1 /*
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jvm.h"
27 #include "asm/assembler.hpp"
28 #include "asm/assembler.inline.hpp"
29 #include "compiler/disassembler.hpp"
30 #include "gc/shared/cardTable.hpp"
31 #include "gc/shared/cardTableModRefBS.hpp"
32 #include "gc/shared/collectedHeap.inline.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "memory/universe.hpp"
36 #include "oops/klass.inline.hpp"
37 #include "prims/methodHandles.hpp"
38 #include "runtime/biasedLocking.hpp"
39 #include "runtime/interfaceSupport.hpp"
40 #include "runtime/objectMonitor.hpp"
41 #include "runtime/os.hpp"
42 #include "runtime/safepoint.hpp"
43 #include "runtime/safepointMechanism.hpp"
44 #include "runtime/sharedRuntime.hpp"
45 #include "runtime/stubRoutines.hpp"
46 #include "runtime/thread.hpp"
47 #include "utilities/macros.hpp"
48 #if INCLUDE_ALL_GCS
49 #include "gc/g1/g1BarrierSet.hpp"
50 #include "gc/g1/g1CardTable.hpp"
51 #include "gc/g1/g1CollectedHeap.inline.hpp"
52 #include "gc/g1/heapRegion.hpp"
53 #endif // INCLUDE_ALL_GCS
54 #include "crc32c.h"
55 #ifdef COMPILER2
56 #include "opto/intrinsicnode.hpp"
57 #endif
58
59 #ifdef PRODUCT
60 #define BLOCK_COMMENT(str) /* nothing */
61 #define STOP(error) stop(error)
62 #else
63 #define BLOCK_COMMENT(str) block_comment(str)
64 #define STOP(error) block_comment(error); stop(error)
65 #endif
66
67 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":")
68
69 #ifdef ASSERT
70 bool AbstractAssembler::pd_check_instruction_mark() { return true; }
71 #endif
72
73 static Assembler::Condition reverse[] = {
74 Assembler::noOverflow /* overflow = 0x0 */ ,
75 Assembler::overflow /* noOverflow = 0x1 */ ,
76 Assembler::aboveEqual /* carrySet = 0x2, below = 0x2 */ ,
77 Assembler::below /* aboveEqual = 0x3, carryClear = 0x3 */ ,
78 Assembler::notZero /* zero = 0x4, equal = 0x4 */ ,
79 Assembler::zero /* notZero = 0x5, notEqual = 0x5 */ ,
80 Assembler::above /* belowEqual = 0x6 */ ,
81 Assembler::belowEqual /* above = 0x7 */ ,
82 Assembler::positive /* negative = 0x8 */ ,
83 Assembler::negative /* positive = 0x9 */ ,
84 Assembler::noParity /* parity = 0xa */ ,
85 Assembler::parity /* noParity = 0xb */ ,
86 Assembler::greaterEqual /* less = 0xc */ ,
87 Assembler::less /* greaterEqual = 0xd */ ,
88 Assembler::greater /* lessEqual = 0xe */ ,
89 Assembler::lessEqual /* greater = 0xf, */
90
91 };
92
93
94 // Implementation of MacroAssembler
95
96 // First all the versions that have distinct versions depending on 32/64 bit
97 // Unless the difference is trivial (1 line or so).
98
99 #ifndef _LP64
100
101 // 32bit versions
102
103 Address MacroAssembler::as_Address(AddressLiteral adr) {
104 return Address(adr.target(), adr.rspec());
105 }
106
107 Address MacroAssembler::as_Address(ArrayAddress adr) {
108 return Address::make_array(adr);
109 }
110
111 void MacroAssembler::call_VM_leaf_base(address entry_point,
112 int number_of_arguments) {
113 call(RuntimeAddress(entry_point));
114 increment(rsp, number_of_arguments * wordSize);
115 }
116
117 void MacroAssembler::cmpklass(Address src1, Metadata* obj) {
118 cmp_literal32(src1, (int32_t)obj, metadata_Relocation::spec_for_immediate());
119 }
120
121 void MacroAssembler::cmpklass(Register src1, Metadata* obj) {
122 cmp_literal32(src1, (int32_t)obj, metadata_Relocation::spec_for_immediate());
123 }
124
125 void MacroAssembler::cmpoop(Address src1, jobject obj) {
126 cmp_literal32(src1, (int32_t)obj, oop_Relocation::spec_for_immediate());
127 }
128
129 void MacroAssembler::cmpoop(Register src1, jobject obj) {
130 cmp_literal32(src1, (int32_t)obj, oop_Relocation::spec_for_immediate());
131 }
132
133 void MacroAssembler::extend_sign(Register hi, Register lo) {
134 // According to Intel Doc. AP-526, "Integer Divide", p.18.
135 if (VM_Version::is_P6() && hi == rdx && lo == rax) {
136 cdql();
137 } else {
138 movl(hi, lo);
139 sarl(hi, 31);
140 }
141 }
142
143 void MacroAssembler::jC2(Register tmp, Label& L) {
144 // set parity bit if FPU flag C2 is set (via rax)
145 save_rax(tmp);
146 fwait(); fnstsw_ax();
147 sahf();
148 restore_rax(tmp);
149 // branch
150 jcc(Assembler::parity, L);
151 }
152
153 void MacroAssembler::jnC2(Register tmp, Label& L) {
154 // set parity bit if FPU flag C2 is set (via rax)
155 save_rax(tmp);
156 fwait(); fnstsw_ax();
157 sahf();
158 restore_rax(tmp);
159 // branch
160 jcc(Assembler::noParity, L);
161 }
162
163 // 32bit can do a case table jump in one instruction but we no longer allow the base
164 // to be installed in the Address class
165 void MacroAssembler::jump(ArrayAddress entry) {
166 jmp(as_Address(entry));
167 }
168
169 // Note: y_lo will be destroyed
170 void MacroAssembler::lcmp2int(Register x_hi, Register x_lo, Register y_hi, Register y_lo) {
171 // Long compare for Java (semantics as described in JVM spec.)
172 Label high, low, done;
173
174 cmpl(x_hi, y_hi);
175 jcc(Assembler::less, low);
176 jcc(Assembler::greater, high);
177 // x_hi is the return register
178 xorl(x_hi, x_hi);
179 cmpl(x_lo, y_lo);
180 jcc(Assembler::below, low);
181 jcc(Assembler::equal, done);
182
183 bind(high);
184 xorl(x_hi, x_hi);
185 increment(x_hi);
186 jmp(done);
187
188 bind(low);
189 xorl(x_hi, x_hi);
190 decrementl(x_hi);
191
192 bind(done);
193 }
194
195 void MacroAssembler::lea(Register dst, AddressLiteral src) {
196 mov_literal32(dst, (int32_t)src.target(), src.rspec());
197 }
198
199 void MacroAssembler::lea(Address dst, AddressLiteral adr) {
200 // leal(dst, as_Address(adr));
201 // see note in movl as to why we must use a move
202 mov_literal32(dst, (int32_t) adr.target(), adr.rspec());
203 }
204
205 void MacroAssembler::leave() {
206 mov(rsp, rbp);
207 pop(rbp);
208 }
209
210 void MacroAssembler::lmul(int x_rsp_offset, int y_rsp_offset) {
211 // Multiplication of two Java long values stored on the stack
212 // as illustrated below. Result is in rdx:rax.
213 //
214 // rsp ---> [ ?? ] \ \
215 // .... | y_rsp_offset |
216 // [ y_lo ] / (in bytes) | x_rsp_offset
217 // [ y_hi ] | (in bytes)
218 // .... |
219 // [ x_lo ] /
220 // [ x_hi ]
221 // ....
222 //
223 // Basic idea: lo(result) = lo(x_lo * y_lo)
224 // hi(result) = hi(x_lo * y_lo) + lo(x_hi * y_lo) + lo(x_lo * y_hi)
225 Address x_hi(rsp, x_rsp_offset + wordSize); Address x_lo(rsp, x_rsp_offset);
226 Address y_hi(rsp, y_rsp_offset + wordSize); Address y_lo(rsp, y_rsp_offset);
227 Label quick;
228 // load x_hi, y_hi and check if quick
229 // multiplication is possible
230 movl(rbx, x_hi);
231 movl(rcx, y_hi);
232 movl(rax, rbx);
233 orl(rbx, rcx); // rbx, = 0 <=> x_hi = 0 and y_hi = 0
234 jcc(Assembler::zero, quick); // if rbx, = 0 do quick multiply
235 // do full multiplication
236 // 1st step
237 mull(y_lo); // x_hi * y_lo
238 movl(rbx, rax); // save lo(x_hi * y_lo) in rbx,
239 // 2nd step
240 movl(rax, x_lo);
241 mull(rcx); // x_lo * y_hi
242 addl(rbx, rax); // add lo(x_lo * y_hi) to rbx,
243 // 3rd step
244 bind(quick); // note: rbx, = 0 if quick multiply!
245 movl(rax, x_lo);
246 mull(y_lo); // x_lo * y_lo
247 addl(rdx, rbx); // correct hi(x_lo * y_lo)
248 }
249
250 void MacroAssembler::lneg(Register hi, Register lo) {
251 negl(lo);
252 adcl(hi, 0);
253 negl(hi);
254 }
255
256 void MacroAssembler::lshl(Register hi, Register lo) {
257 // Java shift left long support (semantics as described in JVM spec., p.305)
258 // (basic idea for shift counts s >= n: x << s == (x << n) << (s - n))
259 // shift value is in rcx !
260 assert(hi != rcx, "must not use rcx");
261 assert(lo != rcx, "must not use rcx");
262 const Register s = rcx; // shift count
263 const int n = BitsPerWord;
264 Label L;
265 andl(s, 0x3f); // s := s & 0x3f (s < 0x40)
266 cmpl(s, n); // if (s < n)
267 jcc(Assembler::less, L); // else (s >= n)
268 movl(hi, lo); // x := x << n
269 xorl(lo, lo);
270 // Note: subl(s, n) is not needed since the Intel shift instructions work rcx mod n!
271 bind(L); // s (mod n) < n
272 shldl(hi, lo); // x := x << s
273 shll(lo);
274 }
275
276
277 void MacroAssembler::lshr(Register hi, Register lo, bool sign_extension) {
278 // Java shift right long support (semantics as described in JVM spec., p.306 & p.310)
279 // (basic idea for shift counts s >= n: x >> s == (x >> n) >> (s - n))
280 assert(hi != rcx, "must not use rcx");
281 assert(lo != rcx, "must not use rcx");
282 const Register s = rcx; // shift count
283 const int n = BitsPerWord;
284 Label L;
285 andl(s, 0x3f); // s := s & 0x3f (s < 0x40)
286 cmpl(s, n); // if (s < n)
287 jcc(Assembler::less, L); // else (s >= n)
288 movl(lo, hi); // x := x >> n
289 if (sign_extension) sarl(hi, 31);
290 else xorl(hi, hi);
291 // Note: subl(s, n) is not needed since the Intel shift instructions work rcx mod n!
292 bind(L); // s (mod n) < n
293 shrdl(lo, hi); // x := x >> s
294 if (sign_extension) sarl(hi);
295 else shrl(hi);
296 }
297
298 void MacroAssembler::movoop(Register dst, jobject obj) {
299 mov_literal32(dst, (int32_t)obj, oop_Relocation::spec_for_immediate());
300 }
301
302 void MacroAssembler::movoop(Address dst, jobject obj) {
303 mov_literal32(dst, (int32_t)obj, oop_Relocation::spec_for_immediate());
304 }
305
306 void MacroAssembler::mov_metadata(Register dst, Metadata* obj) {
307 mov_literal32(dst, (int32_t)obj, metadata_Relocation::spec_for_immediate());
308 }
309
310 void MacroAssembler::mov_metadata(Address dst, Metadata* obj) {
311 mov_literal32(dst, (int32_t)obj, metadata_Relocation::spec_for_immediate());
312 }
313
314 void MacroAssembler::movptr(Register dst, AddressLiteral src, Register scratch) {
315 // scratch register is not used,
316 // it is defined to match parameters of 64-bit version of this method.
317 if (src.is_lval()) {
318 mov_literal32(dst, (intptr_t)src.target(), src.rspec());
319 } else {
320 movl(dst, as_Address(src));
321 }
322 }
323
324 void MacroAssembler::movptr(ArrayAddress dst, Register src) {
325 movl(as_Address(dst), src);
326 }
327
328 void MacroAssembler::movptr(Register dst, ArrayAddress src) {
329 movl(dst, as_Address(src));
330 }
331
332 // src should NEVER be a real pointer. Use AddressLiteral for true pointers
333 void MacroAssembler::movptr(Address dst, intptr_t src) {
334 movl(dst, src);
335 }
336
337
338 void MacroAssembler::pop_callee_saved_registers() {
339 pop(rcx);
340 pop(rdx);
341 pop(rdi);
342 pop(rsi);
343 }
344
345 void MacroAssembler::pop_fTOS() {
346 fld_d(Address(rsp, 0));
347 addl(rsp, 2 * wordSize);
348 }
349
350 void MacroAssembler::push_callee_saved_registers() {
351 push(rsi);
352 push(rdi);
353 push(rdx);
354 push(rcx);
355 }
356
357 void MacroAssembler::push_fTOS() {
358 subl(rsp, 2 * wordSize);
359 fstp_d(Address(rsp, 0));
360 }
361
362
363 void MacroAssembler::pushoop(jobject obj) {
364 push_literal32((int32_t)obj, oop_Relocation::spec_for_immediate());
365 }
366
367 void MacroAssembler::pushklass(Metadata* obj) {
368 push_literal32((int32_t)obj, metadata_Relocation::spec_for_immediate());
369 }
370
371 void MacroAssembler::pushptr(AddressLiteral src) {
372 if (src.is_lval()) {
373 push_literal32((int32_t)src.target(), src.rspec());
374 } else {
375 pushl(as_Address(src));
376 }
377 }
378
379 void MacroAssembler::set_word_if_not_zero(Register dst) {
380 xorl(dst, dst);
381 set_byte_if_not_zero(dst);
382 }
383
384 static void pass_arg0(MacroAssembler* masm, Register arg) {
385 masm->push(arg);
386 }
387
388 static void pass_arg1(MacroAssembler* masm, Register arg) {
389 masm->push(arg);
390 }
391
392 static void pass_arg2(MacroAssembler* masm, Register arg) {
393 masm->push(arg);
394 }
395
396 static void pass_arg3(MacroAssembler* masm, Register arg) {
397 masm->push(arg);
398 }
399
400 #ifndef PRODUCT
401 extern "C" void findpc(intptr_t x);
402 #endif
403
404 void MacroAssembler::debug32(int rdi, int rsi, int rbp, int rsp, int rbx, int rdx, int rcx, int rax, int eip, char* msg) {
405 // In order to get locks to work, we need to fake a in_VM state
406 JavaThread* thread = JavaThread::current();
407 JavaThreadState saved_state = thread->thread_state();
408 thread->set_thread_state(_thread_in_vm);
409 if (ShowMessageBoxOnError) {
410 JavaThread* thread = JavaThread::current();
411 JavaThreadState saved_state = thread->thread_state();
412 thread->set_thread_state(_thread_in_vm);
413 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
414 ttyLocker ttyl;
415 BytecodeCounter::print();
416 }
417 // To see where a verify_oop failed, get $ebx+40/X for this frame.
418 // This is the value of eip which points to where verify_oop will return.
419 if (os::message_box(msg, "Execution stopped, print registers?")) {
420 print_state32(rdi, rsi, rbp, rsp, rbx, rdx, rcx, rax, eip);
421 BREAKPOINT;
422 }
423 } else {
424 ttyLocker ttyl;
425 ::tty->print_cr("=============== DEBUG MESSAGE: %s ================\n", msg);
426 }
427 // Don't assert holding the ttyLock
428 assert(false, "DEBUG MESSAGE: %s", msg);
429 ThreadStateTransition::transition(thread, _thread_in_vm, saved_state);
430 }
431
432 void MacroAssembler::print_state32(int rdi, int rsi, int rbp, int rsp, int rbx, int rdx, int rcx, int rax, int eip) {
433 ttyLocker ttyl;
434 FlagSetting fs(Debugging, true);
435 tty->print_cr("eip = 0x%08x", eip);
436 #ifndef PRODUCT
437 if ((WizardMode || Verbose) && PrintMiscellaneous) {
438 tty->cr();
439 findpc(eip);
440 tty->cr();
441 }
442 #endif
443 #define PRINT_REG(rax) \
444 { tty->print("%s = ", #rax); os::print_location(tty, rax); }
445 PRINT_REG(rax);
446 PRINT_REG(rbx);
447 PRINT_REG(rcx);
448 PRINT_REG(rdx);
449 PRINT_REG(rdi);
450 PRINT_REG(rsi);
451 PRINT_REG(rbp);
452 PRINT_REG(rsp);
453 #undef PRINT_REG
454 // Print some words near top of staack.
455 int* dump_sp = (int*) rsp;
456 for (int col1 = 0; col1 < 8; col1++) {
457 tty->print("(rsp+0x%03x) 0x%08x: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp);
458 os::print_location(tty, *dump_sp++);
459 }
460 for (int row = 0; row < 16; row++) {
461 tty->print("(rsp+0x%03x) 0x%08x: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp);
462 for (int col = 0; col < 8; col++) {
463 tty->print(" 0x%08x", *dump_sp++);
464 }
465 tty->cr();
466 }
467 // Print some instructions around pc:
468 Disassembler::decode((address)eip-64, (address)eip);
469 tty->print_cr("--------");
470 Disassembler::decode((address)eip, (address)eip+32);
471 }
472
473 void MacroAssembler::stop(const char* msg) {
474 ExternalAddress message((address)msg);
475 // push address of message
476 pushptr(message.addr());
477 { Label L; call(L, relocInfo::none); bind(L); } // push eip
478 pusha(); // push registers
479 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug32)));
480 hlt();
481 }
482
483 void MacroAssembler::warn(const char* msg) {
484 push_CPU_state();
485
486 ExternalAddress message((address) msg);
487 // push address of message
488 pushptr(message.addr());
489
490 call(RuntimeAddress(CAST_FROM_FN_PTR(address, warning)));
491 addl(rsp, wordSize); // discard argument
492 pop_CPU_state();
493 }
494
495 void MacroAssembler::print_state() {
496 { Label L; call(L, relocInfo::none); bind(L); } // push eip
497 pusha(); // push registers
498
499 push_CPU_state();
500 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::print_state32)));
501 pop_CPU_state();
502
503 popa();
504 addl(rsp, wordSize);
505 }
506
507 #else // _LP64
508
509 // 64 bit versions
510
511 Address MacroAssembler::as_Address(AddressLiteral adr) {
512 // amd64 always does this as a pc-rel
513 // we can be absolute or disp based on the instruction type
514 // jmp/call are displacements others are absolute
515 assert(!adr.is_lval(), "must be rval");
516 assert(reachable(adr), "must be");
517 return Address((int32_t)(intptr_t)(adr.target() - pc()), adr.target(), adr.reloc());
518
519 }
520
521 Address MacroAssembler::as_Address(ArrayAddress adr) {
522 AddressLiteral base = adr.base();
523 lea(rscratch1, base);
524 Address index = adr.index();
525 assert(index._disp == 0, "must not have disp"); // maybe it can?
526 Address array(rscratch1, index._index, index._scale, index._disp);
527 return array;
528 }
529
530 void MacroAssembler::call_VM_leaf_base(address entry_point, int num_args) {
531 Label L, E;
532
533 #ifdef _WIN64
534 // Windows always allocates space for it's register args
535 assert(num_args <= 4, "only register arguments supported");
536 subq(rsp, frame::arg_reg_save_area_bytes);
537 #endif
538
539 // Align stack if necessary
540 testl(rsp, 15);
541 jcc(Assembler::zero, L);
542
543 subq(rsp, 8);
544 {
545 call(RuntimeAddress(entry_point));
546 }
547 addq(rsp, 8);
548 jmp(E);
549
550 bind(L);
551 {
552 call(RuntimeAddress(entry_point));
553 }
554
555 bind(E);
556
557 #ifdef _WIN64
558 // restore stack pointer
559 addq(rsp, frame::arg_reg_save_area_bytes);
560 #endif
561
562 }
563
564 void MacroAssembler::cmp64(Register src1, AddressLiteral src2) {
565 assert(!src2.is_lval(), "should use cmpptr");
566
567 if (reachable(src2)) {
568 cmpq(src1, as_Address(src2));
569 } else {
570 lea(rscratch1, src2);
571 Assembler::cmpq(src1, Address(rscratch1, 0));
572 }
573 }
574
575 int MacroAssembler::corrected_idivq(Register reg) {
576 // Full implementation of Java ldiv and lrem; checks for special
577 // case as described in JVM spec., p.243 & p.271. The function
578 // returns the (pc) offset of the idivl instruction - may be needed
579 // for implicit exceptions.
580 //
581 // normal case special case
582 //
583 // input : rax: dividend min_long
584 // reg: divisor (may not be eax/edx) -1
585 //
586 // output: rax: quotient (= rax idiv reg) min_long
587 // rdx: remainder (= rax irem reg) 0
588 assert(reg != rax && reg != rdx, "reg cannot be rax or rdx register");
589 static const int64_t min_long = 0x8000000000000000;
590 Label normal_case, special_case;
591
592 // check for special case
593 cmp64(rax, ExternalAddress((address) &min_long));
594 jcc(Assembler::notEqual, normal_case);
595 xorl(rdx, rdx); // prepare rdx for possible special case (where
596 // remainder = 0)
597 cmpq(reg, -1);
598 jcc(Assembler::equal, special_case);
599
600 // handle normal case
601 bind(normal_case);
602 cdqq();
603 int idivq_offset = offset();
604 idivq(reg);
605
606 // normal and special case exit
607 bind(special_case);
608
609 return idivq_offset;
610 }
611
612 void MacroAssembler::decrementq(Register reg, int value) {
613 if (value == min_jint) { subq(reg, value); return; }
614 if (value < 0) { incrementq(reg, -value); return; }
615 if (value == 0) { ; return; }
616 if (value == 1 && UseIncDec) { decq(reg) ; return; }
617 /* else */ { subq(reg, value) ; return; }
618 }
619
620 void MacroAssembler::decrementq(Address dst, int value) {
621 if (value == min_jint) { subq(dst, value); return; }
622 if (value < 0) { incrementq(dst, -value); return; }
623 if (value == 0) { ; return; }
624 if (value == 1 && UseIncDec) { decq(dst) ; return; }
625 /* else */ { subq(dst, value) ; return; }
626 }
627
628 void MacroAssembler::incrementq(AddressLiteral dst) {
629 if (reachable(dst)) {
630 incrementq(as_Address(dst));
631 } else {
632 lea(rscratch1, dst);
633 incrementq(Address(rscratch1, 0));
634 }
635 }
636
637 void MacroAssembler::incrementq(Register reg, int value) {
638 if (value == min_jint) { addq(reg, value); return; }
639 if (value < 0) { decrementq(reg, -value); return; }
640 if (value == 0) { ; return; }
641 if (value == 1 && UseIncDec) { incq(reg) ; return; }
642 /* else */ { addq(reg, value) ; return; }
643 }
644
645 void MacroAssembler::incrementq(Address dst, int value) {
646 if (value == min_jint) { addq(dst, value); return; }
647 if (value < 0) { decrementq(dst, -value); return; }
648 if (value == 0) { ; return; }
649 if (value == 1 && UseIncDec) { incq(dst) ; return; }
650 /* else */ { addq(dst, value) ; return; }
651 }
652
653 // 32bit can do a case table jump in one instruction but we no longer allow the base
654 // to be installed in the Address class
655 void MacroAssembler::jump(ArrayAddress entry) {
656 lea(rscratch1, entry.base());
657 Address dispatch = entry.index();
658 assert(dispatch._base == noreg, "must be");
659 dispatch._base = rscratch1;
660 jmp(dispatch);
661 }
662
663 void MacroAssembler::lcmp2int(Register x_hi, Register x_lo, Register y_hi, Register y_lo) {
664 ShouldNotReachHere(); // 64bit doesn't use two regs
665 cmpq(x_lo, y_lo);
666 }
667
668 void MacroAssembler::lea(Register dst, AddressLiteral src) {
669 mov_literal64(dst, (intptr_t)src.target(), src.rspec());
670 }
671
672 void MacroAssembler::lea(Address dst, AddressLiteral adr) {
673 mov_literal64(rscratch1, (intptr_t)adr.target(), adr.rspec());
674 movptr(dst, rscratch1);
675 }
676
677 void MacroAssembler::leave() {
678 // %%% is this really better? Why not on 32bit too?
679 emit_int8((unsigned char)0xC9); // LEAVE
680 }
681
682 void MacroAssembler::lneg(Register hi, Register lo) {
683 ShouldNotReachHere(); // 64bit doesn't use two regs
684 negq(lo);
685 }
686
687 void MacroAssembler::movoop(Register dst, jobject obj) {
688 mov_literal64(dst, (intptr_t)obj, oop_Relocation::spec_for_immediate());
689 }
690
691 void MacroAssembler::movoop(Address dst, jobject obj) {
692 mov_literal64(rscratch1, (intptr_t)obj, oop_Relocation::spec_for_immediate());
693 movq(dst, rscratch1);
694 }
695
696 void MacroAssembler::mov_metadata(Register dst, Metadata* obj) {
697 mov_literal64(dst, (intptr_t)obj, metadata_Relocation::spec_for_immediate());
698 }
699
700 void MacroAssembler::mov_metadata(Address dst, Metadata* obj) {
701 mov_literal64(rscratch1, (intptr_t)obj, metadata_Relocation::spec_for_immediate());
702 movq(dst, rscratch1);
703 }
704
705 void MacroAssembler::movptr(Register dst, AddressLiteral src, Register scratch) {
706 if (src.is_lval()) {
707 mov_literal64(dst, (intptr_t)src.target(), src.rspec());
708 } else {
709 if (reachable(src)) {
710 movq(dst, as_Address(src));
711 } else {
712 lea(scratch, src);
713 movq(dst, Address(scratch, 0));
714 }
715 }
716 }
717
718 void MacroAssembler::movptr(ArrayAddress dst, Register src) {
719 movq(as_Address(dst), src);
720 }
721
722 void MacroAssembler::movptr(Register dst, ArrayAddress src) {
723 movq(dst, as_Address(src));
724 }
725
726 // src should NEVER be a real pointer. Use AddressLiteral for true pointers
727 void MacroAssembler::movptr(Address dst, intptr_t src) {
728 mov64(rscratch1, src);
729 movq(dst, rscratch1);
730 }
731
732 // These are mostly for initializing NULL
733 void MacroAssembler::movptr(Address dst, int32_t src) {
734 movslq(dst, src);
735 }
736
737 void MacroAssembler::movptr(Register dst, int32_t src) {
738 mov64(dst, (intptr_t)src);
739 }
740
741 void MacroAssembler::pushoop(jobject obj) {
742 movoop(rscratch1, obj);
743 push(rscratch1);
744 }
745
746 void MacroAssembler::pushklass(Metadata* obj) {
747 mov_metadata(rscratch1, obj);
748 push(rscratch1);
749 }
750
751 void MacroAssembler::pushptr(AddressLiteral src) {
752 lea(rscratch1, src);
753 if (src.is_lval()) {
754 push(rscratch1);
755 } else {
756 pushq(Address(rscratch1, 0));
757 }
758 }
759
760 void MacroAssembler::reset_last_Java_frame(bool clear_fp) {
761 // we must set sp to zero to clear frame
762 movptr(Address(r15_thread, JavaThread::last_Java_sp_offset()), NULL_WORD);
763 // must clear fp, so that compiled frames are not confused; it is
764 // possible that we need it only for debugging
765 if (clear_fp) {
766 movptr(Address(r15_thread, JavaThread::last_Java_fp_offset()), NULL_WORD);
767 }
768
769 // Always clear the pc because it could have been set by make_walkable()
770 movptr(Address(r15_thread, JavaThread::last_Java_pc_offset()), NULL_WORD);
771 vzeroupper();
772 }
773
774 void MacroAssembler::set_last_Java_frame(Register last_java_sp,
775 Register last_java_fp,
776 address last_java_pc) {
777 vzeroupper();
778 // determine last_java_sp register
779 if (!last_java_sp->is_valid()) {
780 last_java_sp = rsp;
781 }
782
783 // last_java_fp is optional
784 if (last_java_fp->is_valid()) {
785 movptr(Address(r15_thread, JavaThread::last_Java_fp_offset()),
786 last_java_fp);
787 }
788
789 // last_java_pc is optional
790 if (last_java_pc != NULL) {
791 Address java_pc(r15_thread,
792 JavaThread::frame_anchor_offset() + JavaFrameAnchor::last_Java_pc_offset());
793 lea(rscratch1, InternalAddress(last_java_pc));
794 movptr(java_pc, rscratch1);
795 }
796
797 movptr(Address(r15_thread, JavaThread::last_Java_sp_offset()), last_java_sp);
798 }
799
800 static void pass_arg0(MacroAssembler* masm, Register arg) {
801 if (c_rarg0 != arg ) {
802 masm->mov(c_rarg0, arg);
803 }
804 }
805
806 static void pass_arg1(MacroAssembler* masm, Register arg) {
807 if (c_rarg1 != arg ) {
808 masm->mov(c_rarg1, arg);
809 }
810 }
811
812 static void pass_arg2(MacroAssembler* masm, Register arg) {
813 if (c_rarg2 != arg ) {
814 masm->mov(c_rarg2, arg);
815 }
816 }
817
818 static void pass_arg3(MacroAssembler* masm, Register arg) {
819 if (c_rarg3 != arg ) {
820 masm->mov(c_rarg3, arg);
821 }
822 }
823
824 void MacroAssembler::stop(const char* msg) {
825 address rip = pc();
826 pusha(); // get regs on stack
827 lea(c_rarg0, ExternalAddress((address) msg));
828 lea(c_rarg1, InternalAddress(rip));
829 movq(c_rarg2, rsp); // pass pointer to regs array
830 andq(rsp, -16); // align stack as required by ABI
831 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug64)));
832 hlt();
833 }
834
835 void MacroAssembler::warn(const char* msg) {
836 push(rbp);
837 movq(rbp, rsp);
838 andq(rsp, -16); // align stack as required by push_CPU_state and call
839 push_CPU_state(); // keeps alignment at 16 bytes
840 lea(c_rarg0, ExternalAddress((address) msg));
841 lea(rax, ExternalAddress(CAST_FROM_FN_PTR(address, warning)));
842 call(rax);
843 pop_CPU_state();
844 mov(rsp, rbp);
845 pop(rbp);
846 }
847
848 void MacroAssembler::print_state() {
849 address rip = pc();
850 pusha(); // get regs on stack
851 push(rbp);
852 movq(rbp, rsp);
853 andq(rsp, -16); // align stack as required by push_CPU_state and call
854 push_CPU_state(); // keeps alignment at 16 bytes
855
856 lea(c_rarg0, InternalAddress(rip));
857 lea(c_rarg1, Address(rbp, wordSize)); // pass pointer to regs array
858 call_VM_leaf(CAST_FROM_FN_PTR(address, MacroAssembler::print_state64), c_rarg0, c_rarg1);
859
860 pop_CPU_state();
861 mov(rsp, rbp);
862 pop(rbp);
863 popa();
864 }
865
866 #ifndef PRODUCT
867 extern "C" void findpc(intptr_t x);
868 #endif
869
870 void MacroAssembler::debug64(char* msg, int64_t pc, int64_t regs[]) {
871 // In order to get locks to work, we need to fake a in_VM state
872 if (ShowMessageBoxOnError) {
873 JavaThread* thread = JavaThread::current();
874 JavaThreadState saved_state = thread->thread_state();
875 thread->set_thread_state(_thread_in_vm);
876 #ifndef PRODUCT
877 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
878 ttyLocker ttyl;
879 BytecodeCounter::print();
880 }
881 #endif
882 // To see where a verify_oop failed, get $ebx+40/X for this frame.
883 // XXX correct this offset for amd64
884 // This is the value of eip which points to where verify_oop will return.
885 if (os::message_box(msg, "Execution stopped, print registers?")) {
886 print_state64(pc, regs);
887 BREAKPOINT;
888 assert(false, "start up GDB");
889 }
890 ThreadStateTransition::transition(thread, _thread_in_vm, saved_state);
891 } else {
892 ttyLocker ttyl;
893 ::tty->print_cr("=============== DEBUG MESSAGE: %s ================\n",
894 msg);
895 assert(false, "DEBUG MESSAGE: %s", msg);
896 }
897 }
898
899 void MacroAssembler::print_state64(int64_t pc, int64_t regs[]) {
900 ttyLocker ttyl;
901 FlagSetting fs(Debugging, true);
902 tty->print_cr("rip = 0x%016lx", (intptr_t)pc);
903 #ifndef PRODUCT
904 tty->cr();
905 findpc(pc);
906 tty->cr();
907 #endif
908 #define PRINT_REG(rax, value) \
909 { tty->print("%s = ", #rax); os::print_location(tty, value); }
910 PRINT_REG(rax, regs[15]);
911 PRINT_REG(rbx, regs[12]);
912 PRINT_REG(rcx, regs[14]);
913 PRINT_REG(rdx, regs[13]);
914 PRINT_REG(rdi, regs[8]);
915 PRINT_REG(rsi, regs[9]);
916 PRINT_REG(rbp, regs[10]);
917 PRINT_REG(rsp, regs[11]);
918 PRINT_REG(r8 , regs[7]);
919 PRINT_REG(r9 , regs[6]);
920 PRINT_REG(r10, regs[5]);
921 PRINT_REG(r11, regs[4]);
922 PRINT_REG(r12, regs[3]);
923 PRINT_REG(r13, regs[2]);
924 PRINT_REG(r14, regs[1]);
925 PRINT_REG(r15, regs[0]);
926 #undef PRINT_REG
927 // Print some words near top of staack.
928 int64_t* rsp = (int64_t*) regs[11];
929 int64_t* dump_sp = rsp;
930 for (int col1 = 0; col1 < 8; col1++) {
931 tty->print("(rsp+0x%03x) 0x%016lx: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp);
932 os::print_location(tty, *dump_sp++);
933 }
934 for (int row = 0; row < 25; row++) {
935 tty->print("(rsp+0x%03x) 0x%016lx: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp);
936 for (int col = 0; col < 4; col++) {
937 tty->print(" 0x%016lx", (intptr_t)*dump_sp++);
938 }
939 tty->cr();
940 }
941 // Print some instructions around pc:
942 Disassembler::decode((address)pc-64, (address)pc);
943 tty->print_cr("--------");
944 Disassembler::decode((address)pc, (address)pc+32);
945 }
946
947 #endif // _LP64
948
949 // Now versions that are common to 32/64 bit
950
951 void MacroAssembler::addptr(Register dst, int32_t imm32) {
952 LP64_ONLY(addq(dst, imm32)) NOT_LP64(addl(dst, imm32));
953 }
954
955 void MacroAssembler::addptr(Register dst, Register src) {
956 LP64_ONLY(addq(dst, src)) NOT_LP64(addl(dst, src));
957 }
958
959 void MacroAssembler::addptr(Address dst, Register src) {
960 LP64_ONLY(addq(dst, src)) NOT_LP64(addl(dst, src));
961 }
962
963 void MacroAssembler::addsd(XMMRegister dst, AddressLiteral src) {
964 if (reachable(src)) {
965 Assembler::addsd(dst, as_Address(src));
966 } else {
967 lea(rscratch1, src);
968 Assembler::addsd(dst, Address(rscratch1, 0));
969 }
970 }
971
972 void MacroAssembler::addss(XMMRegister dst, AddressLiteral src) {
973 if (reachable(src)) {
974 addss(dst, as_Address(src));
975 } else {
976 lea(rscratch1, src);
977 addss(dst, Address(rscratch1, 0));
978 }
979 }
980
981 void MacroAssembler::addpd(XMMRegister dst, AddressLiteral src) {
982 if (reachable(src)) {
983 Assembler::addpd(dst, as_Address(src));
984 } else {
985 lea(rscratch1, src);
986 Assembler::addpd(dst, Address(rscratch1, 0));
987 }
988 }
989
990 void MacroAssembler::align(int modulus) {
991 align(modulus, offset());
992 }
993
994 void MacroAssembler::align(int modulus, int target) {
995 if (target % modulus != 0) {
996 nop(modulus - (target % modulus));
997 }
998 }
999
1000 void MacroAssembler::andpd(XMMRegister dst, AddressLiteral src) {
1001 // Used in sign-masking with aligned address.
1002 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes");
1003 if (reachable(src)) {
1004 Assembler::andpd(dst, as_Address(src));
1005 } else {
1006 lea(rscratch1, src);
1007 Assembler::andpd(dst, Address(rscratch1, 0));
1008 }
1009 }
1010
1011 void MacroAssembler::andps(XMMRegister dst, AddressLiteral src) {
1012 // Used in sign-masking with aligned address.
1013 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes");
1014 if (reachable(src)) {
1015 Assembler::andps(dst, as_Address(src));
1016 } else {
1017 lea(rscratch1, src);
1018 Assembler::andps(dst, Address(rscratch1, 0));
1019 }
1020 }
1021
1022 void MacroAssembler::andptr(Register dst, int32_t imm32) {
1023 LP64_ONLY(andq(dst, imm32)) NOT_LP64(andl(dst, imm32));
1024 }
1025
1026 void MacroAssembler::atomic_incl(Address counter_addr) {
1027 if (os::is_MP())
1028 lock();
1029 incrementl(counter_addr);
1030 }
1031
1032 void MacroAssembler::atomic_incl(AddressLiteral counter_addr, Register scr) {
1033 if (reachable(counter_addr)) {
1034 atomic_incl(as_Address(counter_addr));
1035 } else {
1036 lea(scr, counter_addr);
1037 atomic_incl(Address(scr, 0));
1038 }
1039 }
1040
1041 #ifdef _LP64
1042 void MacroAssembler::atomic_incq(Address counter_addr) {
1043 if (os::is_MP())
1044 lock();
1045 incrementq(counter_addr);
1046 }
1047
1048 void MacroAssembler::atomic_incq(AddressLiteral counter_addr, Register scr) {
1049 if (reachable(counter_addr)) {
1050 atomic_incq(as_Address(counter_addr));
1051 } else {
1052 lea(scr, counter_addr);
1053 atomic_incq(Address(scr, 0));
1054 }
1055 }
1056 #endif
1057
1058 // Writes to stack successive pages until offset reached to check for
1059 // stack overflow + shadow pages. This clobbers tmp.
1060 void MacroAssembler::bang_stack_size(Register size, Register tmp) {
1061 movptr(tmp, rsp);
1062 // Bang stack for total size given plus shadow page size.
1063 // Bang one page at a time because large size can bang beyond yellow and
1064 // red zones.
1065 Label loop;
1066 bind(loop);
1067 movl(Address(tmp, (-os::vm_page_size())), size );
1068 subptr(tmp, os::vm_page_size());
1069 subl(size, os::vm_page_size());
1070 jcc(Assembler::greater, loop);
1071
1072 // Bang down shadow pages too.
1073 // At this point, (tmp-0) is the last address touched, so don't
1074 // touch it again. (It was touched as (tmp-pagesize) but then tmp
1075 // was post-decremented.) Skip this address by starting at i=1, and
1076 // touch a few more pages below. N.B. It is important to touch all
1077 // the way down including all pages in the shadow zone.
1078 for (int i = 1; i < ((int)JavaThread::stack_shadow_zone_size() / os::vm_page_size()); i++) {
1079 // this could be any sized move but this is can be a debugging crumb
1080 // so the bigger the better.
1081 movptr(Address(tmp, (-i*os::vm_page_size())), size );
1082 }
1083 }
1084
1085 void MacroAssembler::reserved_stack_check() {
1086 // testing if reserved zone needs to be enabled
1087 Label no_reserved_zone_enabling;
1088 Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread);
1089 NOT_LP64(get_thread(rsi);)
1090
1091 cmpptr(rsp, Address(thread, JavaThread::reserved_stack_activation_offset()));
1092 jcc(Assembler::below, no_reserved_zone_enabling);
1093
1094 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), thread);
1095 jump(RuntimeAddress(StubRoutines::throw_delayed_StackOverflowError_entry()));
1096 should_not_reach_here();
1097
1098 bind(no_reserved_zone_enabling);
1099 }
1100
1101 int MacroAssembler::biased_locking_enter(Register lock_reg,
1102 Register obj_reg,
1103 Register swap_reg,
1104 Register tmp_reg,
1105 bool swap_reg_contains_mark,
1106 Label& done,
1107 Label* slow_case,
1108 BiasedLockingCounters* counters) {
1109 assert(UseBiasedLocking, "why call this otherwise?");
1110 assert(swap_reg == rax, "swap_reg must be rax for cmpxchgq");
1111 assert(tmp_reg != noreg, "tmp_reg must be supplied");
1112 assert_different_registers(lock_reg, obj_reg, swap_reg, tmp_reg);
1113 assert(markOopDesc::age_shift == markOopDesc::lock_bits + markOopDesc::biased_lock_bits, "biased locking makes assumptions about bit layout");
1114 Address mark_addr (obj_reg, oopDesc::mark_offset_in_bytes());
1115 NOT_LP64( Address saved_mark_addr(lock_reg, 0); )
1116
1117 if (PrintBiasedLockingStatistics && counters == NULL) {
1118 counters = BiasedLocking::counters();
1119 }
1120 // Biased locking
1121 // See whether the lock is currently biased toward our thread and
1122 // whether the epoch is still valid
1123 // Note that the runtime guarantees sufficient alignment of JavaThread
1124 // pointers to allow age to be placed into low bits
1125 // First check to see whether biasing is even enabled for this object
1126 Label cas_label;
1127 int null_check_offset = -1;
1128 if (!swap_reg_contains_mark) {
1129 null_check_offset = offset();
1130 movptr(swap_reg, mark_addr);
1131 }
1132 movptr(tmp_reg, swap_reg);
1133 andptr(tmp_reg, markOopDesc::biased_lock_mask_in_place);
1134 cmpptr(tmp_reg, markOopDesc::biased_lock_pattern);
1135 jcc(Assembler::notEqual, cas_label);
1136 // The bias pattern is present in the object's header. Need to check
1137 // whether the bias owner and the epoch are both still current.
1138 #ifndef _LP64
1139 // Note that because there is no current thread register on x86_32 we
1140 // need to store off the mark word we read out of the object to
1141 // avoid reloading it and needing to recheck invariants below. This
1142 // store is unfortunate but it makes the overall code shorter and
1143 // simpler.
1144 movptr(saved_mark_addr, swap_reg);
1145 #endif
1146 if (swap_reg_contains_mark) {
1147 null_check_offset = offset();
1148 }
1149 load_prototype_header(tmp_reg, obj_reg);
1150 #ifdef _LP64
1151 orptr(tmp_reg, r15_thread);
1152 xorptr(tmp_reg, swap_reg);
1153 Register header_reg = tmp_reg;
1154 #else
1155 xorptr(tmp_reg, swap_reg);
1156 get_thread(swap_reg);
1157 xorptr(swap_reg, tmp_reg);
1158 Register header_reg = swap_reg;
1159 #endif
1160 andptr(header_reg, ~((int) markOopDesc::age_mask_in_place));
1161 if (counters != NULL) {
1162 cond_inc32(Assembler::zero,
1163 ExternalAddress((address) counters->biased_lock_entry_count_addr()));
1164 }
1165 jcc(Assembler::equal, done);
1166
1167 Label try_revoke_bias;
1168 Label try_rebias;
1169
1170 // At this point we know that the header has the bias pattern and
1171 // that we are not the bias owner in the current epoch. We need to
1172 // figure out more details about the state of the header in order to
1173 // know what operations can be legally performed on the object's
1174 // header.
1175
1176 // If the low three bits in the xor result aren't clear, that means
1177 // the prototype header is no longer biased and we have to revoke
1178 // the bias on this object.
1179 testptr(header_reg, markOopDesc::biased_lock_mask_in_place);
1180 jccb(Assembler::notZero, try_revoke_bias);
1181
1182 // Biasing is still enabled for this data type. See whether the
1183 // epoch of the current bias is still valid, meaning that the epoch
1184 // bits of the mark word are equal to the epoch bits of the
1185 // prototype header. (Note that the prototype header's epoch bits
1186 // only change at a safepoint.) If not, attempt to rebias the object
1187 // toward the current thread. Note that we must be absolutely sure
1188 // that the current epoch is invalid in order to do this because
1189 // otherwise the manipulations it performs on the mark word are
1190 // illegal.
1191 testptr(header_reg, markOopDesc::epoch_mask_in_place);
1192 jccb(Assembler::notZero, try_rebias);
1193
1194 // The epoch of the current bias is still valid but we know nothing
1195 // about the owner; it might be set or it might be clear. Try to
1196 // acquire the bias of the object using an atomic operation. If this
1197 // fails we will go in to the runtime to revoke the object's bias.
1198 // Note that we first construct the presumed unbiased header so we
1199 // don't accidentally blow away another thread's valid bias.
1200 NOT_LP64( movptr(swap_reg, saved_mark_addr); )
1201 andptr(swap_reg,
1202 markOopDesc::biased_lock_mask_in_place | markOopDesc::age_mask_in_place | markOopDesc::epoch_mask_in_place);
1203 #ifdef _LP64
1204 movptr(tmp_reg, swap_reg);
1205 orptr(tmp_reg, r15_thread);
1206 #else
1207 get_thread(tmp_reg);
1208 orptr(tmp_reg, swap_reg);
1209 #endif
1210 if (os::is_MP()) {
1211 lock();
1212 }
1213 cmpxchgptr(tmp_reg, mark_addr); // compare tmp_reg and swap_reg
1214 // If the biasing toward our thread failed, this means that
1215 // another thread succeeded in biasing it toward itself and we
1216 // need to revoke that bias. The revocation will occur in the
1217 // interpreter runtime in the slow case.
1218 if (counters != NULL) {
1219 cond_inc32(Assembler::zero,
1220 ExternalAddress((address) counters->anonymously_biased_lock_entry_count_addr()));
1221 }
1222 if (slow_case != NULL) {
1223 jcc(Assembler::notZero, *slow_case);
1224 }
1225 jmp(done);
1226
1227 bind(try_rebias);
1228 // At this point we know the epoch has expired, meaning that the
1229 // current "bias owner", if any, is actually invalid. Under these
1230 // circumstances _only_, we are allowed to use the current header's
1231 // value as the comparison value when doing the cas to acquire the
1232 // bias in the current epoch. In other words, we allow transfer of
1233 // the bias from one thread to another directly in this situation.
1234 //
1235 // FIXME: due to a lack of registers we currently blow away the age
1236 // bits in this situation. Should attempt to preserve them.
1237 load_prototype_header(tmp_reg, obj_reg);
1238 #ifdef _LP64
1239 orptr(tmp_reg, r15_thread);
1240 #else
1241 get_thread(swap_reg);
1242 orptr(tmp_reg, swap_reg);
1243 movptr(swap_reg, saved_mark_addr);
1244 #endif
1245 if (os::is_MP()) {
1246 lock();
1247 }
1248 cmpxchgptr(tmp_reg, mark_addr); // compare tmp_reg and swap_reg
1249 // If the biasing toward our thread failed, then another thread
1250 // succeeded in biasing it toward itself and we need to revoke that
1251 // bias. The revocation will occur in the runtime in the slow case.
1252 if (counters != NULL) {
1253 cond_inc32(Assembler::zero,
1254 ExternalAddress((address) counters->rebiased_lock_entry_count_addr()));
1255 }
1256 if (slow_case != NULL) {
1257 jcc(Assembler::notZero, *slow_case);
1258 }
1259 jmp(done);
1260
1261 bind(try_revoke_bias);
1262 // The prototype mark in the klass doesn't have the bias bit set any
1263 // more, indicating that objects of this data type are not supposed
1264 // to be biased any more. We are going to try to reset the mark of
1265 // this object to the prototype value and fall through to the
1266 // CAS-based locking scheme. Note that if our CAS fails, it means
1267 // that another thread raced us for the privilege of revoking the
1268 // bias of this particular object, so it's okay to continue in the
1269 // normal locking code.
1270 //
1271 // FIXME: due to a lack of registers we currently blow away the age
1272 // bits in this situation. Should attempt to preserve them.
1273 NOT_LP64( movptr(swap_reg, saved_mark_addr); )
1274 load_prototype_header(tmp_reg, obj_reg);
1275 if (os::is_MP()) {
1276 lock();
1277 }
1278 cmpxchgptr(tmp_reg, mark_addr); // compare tmp_reg and swap_reg
1279 // Fall through to the normal CAS-based lock, because no matter what
1280 // the result of the above CAS, some thread must have succeeded in
1281 // removing the bias bit from the object's header.
1282 if (counters != NULL) {
1283 cond_inc32(Assembler::zero,
1284 ExternalAddress((address) counters->revoked_lock_entry_count_addr()));
1285 }
1286
1287 bind(cas_label);
1288
1289 return null_check_offset;
1290 }
1291
1292 void MacroAssembler::biased_locking_exit(Register obj_reg, Register temp_reg, Label& done) {
1293 assert(UseBiasedLocking, "why call this otherwise?");
1294
1295 // Check for biased locking unlock case, which is a no-op
1296 // Note: we do not have to check the thread ID for two reasons.
1297 // First, the interpreter checks for IllegalMonitorStateException at
1298 // a higher level. Second, if the bias was revoked while we held the
1299 // lock, the object could not be rebiased toward another thread, so
1300 // the bias bit would be clear.
1301 movptr(temp_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1302 andptr(temp_reg, markOopDesc::biased_lock_mask_in_place);
1303 cmpptr(temp_reg, markOopDesc::biased_lock_pattern);
1304 jcc(Assembler::equal, done);
1305 }
1306
1307 #ifdef COMPILER2
1308
1309 #if INCLUDE_RTM_OPT
1310
1311 // Update rtm_counters based on abort status
1312 // input: abort_status
1313 // rtm_counters (RTMLockingCounters*)
1314 // flags are killed
1315 void MacroAssembler::rtm_counters_update(Register abort_status, Register rtm_counters) {
1316
1317 atomic_incptr(Address(rtm_counters, RTMLockingCounters::abort_count_offset()));
1318 if (PrintPreciseRTMLockingStatistics) {
1319 for (int i = 0; i < RTMLockingCounters::ABORT_STATUS_LIMIT; i++) {
1320 Label check_abort;
1321 testl(abort_status, (1<<i));
1322 jccb(Assembler::equal, check_abort);
1323 atomic_incptr(Address(rtm_counters, RTMLockingCounters::abortX_count_offset() + (i * sizeof(uintx))));
1324 bind(check_abort);
1325 }
1326 }
1327 }
1328
1329 // Branch if (random & (count-1) != 0), count is 2^n
1330 // tmp, scr and flags are killed
1331 void MacroAssembler::branch_on_random_using_rdtsc(Register tmp, Register scr, int count, Label& brLabel) {
1332 assert(tmp == rax, "");
1333 assert(scr == rdx, "");
1334 rdtsc(); // modifies EDX:EAX
1335 andptr(tmp, count-1);
1336 jccb(Assembler::notZero, brLabel);
1337 }
1338
1339 // Perform abort ratio calculation, set no_rtm bit if high ratio
1340 // input: rtm_counters_Reg (RTMLockingCounters* address)
1341 // tmpReg, rtm_counters_Reg and flags are killed
1342 void MacroAssembler::rtm_abort_ratio_calculation(Register tmpReg,
1343 Register rtm_counters_Reg,
1344 RTMLockingCounters* rtm_counters,
1345 Metadata* method_data) {
1346 Label L_done, L_check_always_rtm1, L_check_always_rtm2;
1347
1348 if (RTMLockingCalculationDelay > 0) {
1349 // Delay calculation
1350 movptr(tmpReg, ExternalAddress((address) RTMLockingCounters::rtm_calculation_flag_addr()), tmpReg);
1351 testptr(tmpReg, tmpReg);
1352 jccb(Assembler::equal, L_done);
1353 }
1354 // Abort ratio calculation only if abort_count > RTMAbortThreshold
1355 // Aborted transactions = abort_count * 100
1356 // All transactions = total_count * RTMTotalCountIncrRate
1357 // Set no_rtm bit if (Aborted transactions >= All transactions * RTMAbortRatio)
1358
1359 movptr(tmpReg, Address(rtm_counters_Reg, RTMLockingCounters::abort_count_offset()));
1360 cmpptr(tmpReg, RTMAbortThreshold);
1361 jccb(Assembler::below, L_check_always_rtm2);
1362 imulptr(tmpReg, tmpReg, 100);
1363
1364 Register scrReg = rtm_counters_Reg;
1365 movptr(scrReg, Address(rtm_counters_Reg, RTMLockingCounters::total_count_offset()));
1366 imulptr(scrReg, scrReg, RTMTotalCountIncrRate);
1367 imulptr(scrReg, scrReg, RTMAbortRatio);
1368 cmpptr(tmpReg, scrReg);
1369 jccb(Assembler::below, L_check_always_rtm1);
1370 if (method_data != NULL) {
1371 // set rtm_state to "no rtm" in MDO
1372 mov_metadata(tmpReg, method_data);
1373 if (os::is_MP()) {
1374 lock();
1375 }
1376 orl(Address(tmpReg, MethodData::rtm_state_offset_in_bytes()), NoRTM);
1377 }
1378 jmpb(L_done);
1379 bind(L_check_always_rtm1);
1380 // Reload RTMLockingCounters* address
1381 lea(rtm_counters_Reg, ExternalAddress((address)rtm_counters));
1382 bind(L_check_always_rtm2);
1383 movptr(tmpReg, Address(rtm_counters_Reg, RTMLockingCounters::total_count_offset()));
1384 cmpptr(tmpReg, RTMLockingThreshold / RTMTotalCountIncrRate);
1385 jccb(Assembler::below, L_done);
1386 if (method_data != NULL) {
1387 // set rtm_state to "always rtm" in MDO
1388 mov_metadata(tmpReg, method_data);
1389 if (os::is_MP()) {
1390 lock();
1391 }
1392 orl(Address(tmpReg, MethodData::rtm_state_offset_in_bytes()), UseRTM);
1393 }
1394 bind(L_done);
1395 }
1396
1397 // Update counters and perform abort ratio calculation
1398 // input: abort_status_Reg
1399 // rtm_counters_Reg, flags are killed
1400 void MacroAssembler::rtm_profiling(Register abort_status_Reg,
1401 Register rtm_counters_Reg,
1402 RTMLockingCounters* rtm_counters,
1403 Metadata* method_data,
1404 bool profile_rtm) {
1405
1406 assert(rtm_counters != NULL, "should not be NULL when profiling RTM");
1407 // update rtm counters based on rax value at abort
1408 // reads abort_status_Reg, updates flags
1409 lea(rtm_counters_Reg, ExternalAddress((address)rtm_counters));
1410 rtm_counters_update(abort_status_Reg, rtm_counters_Reg);
1411 if (profile_rtm) {
1412 // Save abort status because abort_status_Reg is used by following code.
1413 if (RTMRetryCount > 0) {
1414 push(abort_status_Reg);
1415 }
1416 assert(rtm_counters != NULL, "should not be NULL when profiling RTM");
1417 rtm_abort_ratio_calculation(abort_status_Reg, rtm_counters_Reg, rtm_counters, method_data);
1418 // restore abort status
1419 if (RTMRetryCount > 0) {
1420 pop(abort_status_Reg);
1421 }
1422 }
1423 }
1424
1425 // Retry on abort if abort's status is 0x6: can retry (0x2) | memory conflict (0x4)
1426 // inputs: retry_count_Reg
1427 // : abort_status_Reg
1428 // output: retry_count_Reg decremented by 1
1429 // flags are killed
1430 void MacroAssembler::rtm_retry_lock_on_abort(Register retry_count_Reg, Register abort_status_Reg, Label& retryLabel) {
1431 Label doneRetry;
1432 assert(abort_status_Reg == rax, "");
1433 // The abort reason bits are in eax (see all states in rtmLocking.hpp)
1434 // 0x6 = conflict on which we can retry (0x2) | memory conflict (0x4)
1435 // if reason is in 0x6 and retry count != 0 then retry
1436 andptr(abort_status_Reg, 0x6);
1437 jccb(Assembler::zero, doneRetry);
1438 testl(retry_count_Reg, retry_count_Reg);
1439 jccb(Assembler::zero, doneRetry);
1440 pause();
1441 decrementl(retry_count_Reg);
1442 jmp(retryLabel);
1443 bind(doneRetry);
1444 }
1445
1446 // Spin and retry if lock is busy,
1447 // inputs: box_Reg (monitor address)
1448 // : retry_count_Reg
1449 // output: retry_count_Reg decremented by 1
1450 // : clear z flag if retry count exceeded
1451 // tmp_Reg, scr_Reg, flags are killed
1452 void MacroAssembler::rtm_retry_lock_on_busy(Register retry_count_Reg, Register box_Reg,
1453 Register tmp_Reg, Register scr_Reg, Label& retryLabel) {
1454 Label SpinLoop, SpinExit, doneRetry;
1455 int owner_offset = OM_OFFSET_NO_MONITOR_VALUE_TAG(owner);
1456
1457 testl(retry_count_Reg, retry_count_Reg);
1458 jccb(Assembler::zero, doneRetry);
1459 decrementl(retry_count_Reg);
1460 movptr(scr_Reg, RTMSpinLoopCount);
1461
1462 bind(SpinLoop);
1463 pause();
1464 decrementl(scr_Reg);
1465 jccb(Assembler::lessEqual, SpinExit);
1466 movptr(tmp_Reg, Address(box_Reg, owner_offset));
1467 testptr(tmp_Reg, tmp_Reg);
1468 jccb(Assembler::notZero, SpinLoop);
1469
1470 bind(SpinExit);
1471 jmp(retryLabel);
1472 bind(doneRetry);
1473 incrementl(retry_count_Reg); // clear z flag
1474 }
1475
1476 // Use RTM for normal stack locks
1477 // Input: objReg (object to lock)
1478 void MacroAssembler::rtm_stack_locking(Register objReg, Register tmpReg, Register scrReg,
1479 Register retry_on_abort_count_Reg,
1480 RTMLockingCounters* stack_rtm_counters,
1481 Metadata* method_data, bool profile_rtm,
1482 Label& DONE_LABEL, Label& IsInflated) {
1483 assert(UseRTMForStackLocks, "why call this otherwise?");
1484 assert(!UseBiasedLocking, "Biased locking is not supported with RTM locking");
1485 assert(tmpReg == rax, "");
1486 assert(scrReg == rdx, "");
1487 Label L_rtm_retry, L_decrement_retry, L_on_abort;
1488
1489 if (RTMRetryCount > 0) {
1490 movl(retry_on_abort_count_Reg, RTMRetryCount); // Retry on abort
1491 bind(L_rtm_retry);
1492 }
1493 movptr(tmpReg, Address(objReg, oopDesc::mark_offset_in_bytes()));
1494 testptr(tmpReg, markOopDesc::monitor_value); // inflated vs stack-locked|neutral|biased
1495 jcc(Assembler::notZero, IsInflated);
1496
1497 if (PrintPreciseRTMLockingStatistics || profile_rtm) {
1498 Label L_noincrement;
1499 if (RTMTotalCountIncrRate > 1) {
1500 // tmpReg, scrReg and flags are killed
1501 branch_on_random_using_rdtsc(tmpReg, scrReg, RTMTotalCountIncrRate, L_noincrement);
1502 }
1503 assert(stack_rtm_counters != NULL, "should not be NULL when profiling RTM");
1504 atomic_incptr(ExternalAddress((address)stack_rtm_counters->total_count_addr()), scrReg);
1505 bind(L_noincrement);
1506 }
1507 xbegin(L_on_abort);
1508 movptr(tmpReg, Address(objReg, oopDesc::mark_offset_in_bytes())); // fetch markword
1509 andptr(tmpReg, markOopDesc::biased_lock_mask_in_place); // look at 3 lock bits
1510 cmpptr(tmpReg, markOopDesc::unlocked_value); // bits = 001 unlocked
1511 jcc(Assembler::equal, DONE_LABEL); // all done if unlocked
1512
1513 Register abort_status_Reg = tmpReg; // status of abort is stored in RAX
1514 if (UseRTMXendForLockBusy) {
1515 xend();
1516 movptr(abort_status_Reg, 0x2); // Set the abort status to 2 (so we can retry)
1517 jmp(L_decrement_retry);
1518 }
1519 else {
1520 xabort(0);
1521 }
1522 bind(L_on_abort);
1523 if (PrintPreciseRTMLockingStatistics || profile_rtm) {
1524 rtm_profiling(abort_status_Reg, scrReg, stack_rtm_counters, method_data, profile_rtm);
1525 }
1526 bind(L_decrement_retry);
1527 if (RTMRetryCount > 0) {
1528 // retry on lock abort if abort status is 'can retry' (0x2) or 'memory conflict' (0x4)
1529 rtm_retry_lock_on_abort(retry_on_abort_count_Reg, abort_status_Reg, L_rtm_retry);
1530 }
1531 }
1532
1533 // Use RTM for inflating locks
1534 // inputs: objReg (object to lock)
1535 // boxReg (on-stack box address (displaced header location) - KILLED)
1536 // tmpReg (ObjectMonitor address + markOopDesc::monitor_value)
1537 void MacroAssembler::rtm_inflated_locking(Register objReg, Register boxReg, Register tmpReg,
1538 Register scrReg, Register retry_on_busy_count_Reg,
1539 Register retry_on_abort_count_Reg,
1540 RTMLockingCounters* rtm_counters,
1541 Metadata* method_data, bool profile_rtm,
1542 Label& DONE_LABEL) {
1543 assert(UseRTMLocking, "why call this otherwise?");
1544 assert(tmpReg == rax, "");
1545 assert(scrReg == rdx, "");
1546 Label L_rtm_retry, L_decrement_retry, L_on_abort;
1547 int owner_offset = OM_OFFSET_NO_MONITOR_VALUE_TAG(owner);
1548
1549 // Without cast to int32_t a movptr will destroy r10 which is typically obj
1550 movptr(Address(boxReg, 0), (int32_t)intptr_t(markOopDesc::unused_mark()));
1551 movptr(boxReg, tmpReg); // Save ObjectMonitor address
1552
1553 if (RTMRetryCount > 0) {
1554 movl(retry_on_busy_count_Reg, RTMRetryCount); // Retry on lock busy
1555 movl(retry_on_abort_count_Reg, RTMRetryCount); // Retry on abort
1556 bind(L_rtm_retry);
1557 }
1558 if (PrintPreciseRTMLockingStatistics || profile_rtm) {
1559 Label L_noincrement;
1560 if (RTMTotalCountIncrRate > 1) {
1561 // tmpReg, scrReg and flags are killed
1562 branch_on_random_using_rdtsc(tmpReg, scrReg, RTMTotalCountIncrRate, L_noincrement);
1563 }
1564 assert(rtm_counters != NULL, "should not be NULL when profiling RTM");
1565 atomic_incptr(ExternalAddress((address)rtm_counters->total_count_addr()), scrReg);
1566 bind(L_noincrement);
1567 }
1568 xbegin(L_on_abort);
1569 movptr(tmpReg, Address(objReg, oopDesc::mark_offset_in_bytes()));
1570 movptr(tmpReg, Address(tmpReg, owner_offset));
1571 testptr(tmpReg, tmpReg);
1572 jcc(Assembler::zero, DONE_LABEL);
1573 if (UseRTMXendForLockBusy) {
1574 xend();
1575 jmp(L_decrement_retry);
1576 }
1577 else {
1578 xabort(0);
1579 }
1580 bind(L_on_abort);
1581 Register abort_status_Reg = tmpReg; // status of abort is stored in RAX
1582 if (PrintPreciseRTMLockingStatistics || profile_rtm) {
1583 rtm_profiling(abort_status_Reg, scrReg, rtm_counters, method_data, profile_rtm);
1584 }
1585 if (RTMRetryCount > 0) {
1586 // retry on lock abort if abort status is 'can retry' (0x2) or 'memory conflict' (0x4)
1587 rtm_retry_lock_on_abort(retry_on_abort_count_Reg, abort_status_Reg, L_rtm_retry);
1588 }
1589
1590 movptr(tmpReg, Address(boxReg, owner_offset)) ;
1591 testptr(tmpReg, tmpReg) ;
1592 jccb(Assembler::notZero, L_decrement_retry) ;
1593
1594 // Appears unlocked - try to swing _owner from null to non-null.
1595 // Invariant: tmpReg == 0. tmpReg is EAX which is the implicit cmpxchg comparand.
1596 #ifdef _LP64
1597 Register threadReg = r15_thread;
1598 #else
1599 get_thread(scrReg);
1600 Register threadReg = scrReg;
1601 #endif
1602 if (os::is_MP()) {
1603 lock();
1604 }
1605 cmpxchgptr(threadReg, Address(boxReg, owner_offset)); // Updates tmpReg
1606
1607 if (RTMRetryCount > 0) {
1608 // success done else retry
1609 jccb(Assembler::equal, DONE_LABEL) ;
1610 bind(L_decrement_retry);
1611 // Spin and retry if lock is busy.
1612 rtm_retry_lock_on_busy(retry_on_busy_count_Reg, boxReg, tmpReg, scrReg, L_rtm_retry);
1613 }
1614 else {
1615 bind(L_decrement_retry);
1616 }
1617 }
1618
1619 #endif // INCLUDE_RTM_OPT
1620
1621 // Fast_Lock and Fast_Unlock used by C2
1622
1623 // Because the transitions from emitted code to the runtime
1624 // monitorenter/exit helper stubs are so slow it's critical that
1625 // we inline both the stack-locking fast-path and the inflated fast path.
1626 //
1627 // See also: cmpFastLock and cmpFastUnlock.
1628 //
1629 // What follows is a specialized inline transliteration of the code
1630 // in slow_enter() and slow_exit(). If we're concerned about I$ bloat
1631 // another option would be to emit TrySlowEnter and TrySlowExit methods
1632 // at startup-time. These methods would accept arguments as
1633 // (rax,=Obj, rbx=Self, rcx=box, rdx=Scratch) and return success-failure
1634 // indications in the icc.ZFlag. Fast_Lock and Fast_Unlock would simply
1635 // marshal the arguments and emit calls to TrySlowEnter and TrySlowExit.
1636 // In practice, however, the # of lock sites is bounded and is usually small.
1637 // Besides the call overhead, TrySlowEnter and TrySlowExit might suffer
1638 // if the processor uses simple bimodal branch predictors keyed by EIP
1639 // Since the helper routines would be called from multiple synchronization
1640 // sites.
1641 //
1642 // An even better approach would be write "MonitorEnter()" and "MonitorExit()"
1643 // in java - using j.u.c and unsafe - and just bind the lock and unlock sites
1644 // to those specialized methods. That'd give us a mostly platform-independent
1645 // implementation that the JITs could optimize and inline at their pleasure.
1646 // Done correctly, the only time we'd need to cross to native could would be
1647 // to park() or unpark() threads. We'd also need a few more unsafe operators
1648 // to (a) prevent compiler-JIT reordering of non-volatile accesses, and
1649 // (b) explicit barriers or fence operations.
1650 //
1651 // TODO:
1652 //
1653 // * Arrange for C2 to pass "Self" into Fast_Lock and Fast_Unlock in one of the registers (scr).
1654 // This avoids manifesting the Self pointer in the Fast_Lock and Fast_Unlock terminals.
1655 // Given TLAB allocation, Self is usually manifested in a register, so passing it into
1656 // the lock operators would typically be faster than reifying Self.
1657 //
1658 // * Ideally I'd define the primitives as:
1659 // fast_lock (nax Obj, nax box, EAX tmp, nax scr) where box, tmp and scr are KILLED.
1660 // fast_unlock (nax Obj, EAX box, nax tmp) where box and tmp are KILLED
1661 // Unfortunately ADLC bugs prevent us from expressing the ideal form.
1662 // Instead, we're stuck with a rather awkward and brittle register assignments below.
1663 // Furthermore the register assignments are overconstrained, possibly resulting in
1664 // sub-optimal code near the synchronization site.
1665 //
1666 // * Eliminate the sp-proximity tests and just use "== Self" tests instead.
1667 // Alternately, use a better sp-proximity test.
1668 //
1669 // * Currently ObjectMonitor._Owner can hold either an sp value or a (THREAD *) value.
1670 // Either one is sufficient to uniquely identify a thread.
1671 // TODO: eliminate use of sp in _owner and use get_thread(tr) instead.
1672 //
1673 // * Intrinsify notify() and notifyAll() for the common cases where the
1674 // object is locked by the calling thread but the waitlist is empty.
1675 // avoid the expensive JNI call to JVM_Notify() and JVM_NotifyAll().
1676 //
1677 // * use jccb and jmpb instead of jcc and jmp to improve code density.
1678 // But beware of excessive branch density on AMD Opterons.
1679 //
1680 // * Both Fast_Lock and Fast_Unlock set the ICC.ZF to indicate success
1681 // or failure of the fast-path. If the fast-path fails then we pass
1682 // control to the slow-path, typically in C. In Fast_Lock and
1683 // Fast_Unlock we often branch to DONE_LABEL, just to find that C2
1684 // will emit a conditional branch immediately after the node.
1685 // So we have branches to branches and lots of ICC.ZF games.
1686 // Instead, it might be better to have C2 pass a "FailureLabel"
1687 // into Fast_Lock and Fast_Unlock. In the case of success, control
1688 // will drop through the node. ICC.ZF is undefined at exit.
1689 // In the case of failure, the node will branch directly to the
1690 // FailureLabel
1691
1692
1693 // obj: object to lock
1694 // box: on-stack box address (displaced header location) - KILLED
1695 // rax,: tmp -- KILLED
1696 // scr: tmp -- KILLED
1697 void MacroAssembler::fast_lock(Register objReg, Register boxReg, Register tmpReg,
1698 Register scrReg, Register cx1Reg, Register cx2Reg,
1699 BiasedLockingCounters* counters,
1700 RTMLockingCounters* rtm_counters,
1701 RTMLockingCounters* stack_rtm_counters,
1702 Metadata* method_data,
1703 bool use_rtm, bool profile_rtm) {
1704 // Ensure the register assignments are disjoint
1705 assert(tmpReg == rax, "");
1706
1707 if (use_rtm) {
1708 assert_different_registers(objReg, boxReg, tmpReg, scrReg, cx1Reg, cx2Reg);
1709 } else {
1710 assert(cx1Reg == noreg, "");
1711 assert(cx2Reg == noreg, "");
1712 assert_different_registers(objReg, boxReg, tmpReg, scrReg);
1713 }
1714
1715 if (counters != NULL) {
1716 atomic_incl(ExternalAddress((address)counters->total_entry_count_addr()), scrReg);
1717 }
1718 if (EmitSync & 1) {
1719 // set box->dhw = markOopDesc::unused_mark()
1720 // Force all sync thru slow-path: slow_enter() and slow_exit()
1721 movptr (Address(boxReg, 0), (int32_t)intptr_t(markOopDesc::unused_mark()));
1722 cmpptr (rsp, (int32_t)NULL_WORD);
1723 } else {
1724 // Possible cases that we'll encounter in fast_lock
1725 // ------------------------------------------------
1726 // * Inflated
1727 // -- unlocked
1728 // -- Locked
1729 // = by self
1730 // = by other
1731 // * biased
1732 // -- by Self
1733 // -- by other
1734 // * neutral
1735 // * stack-locked
1736 // -- by self
1737 // = sp-proximity test hits
1738 // = sp-proximity test generates false-negative
1739 // -- by other
1740 //
1741
1742 Label IsInflated, DONE_LABEL;
1743
1744 // it's stack-locked, biased or neutral
1745 // TODO: optimize away redundant LDs of obj->mark and improve the markword triage
1746 // order to reduce the number of conditional branches in the most common cases.
1747 // Beware -- there's a subtle invariant that fetch of the markword
1748 // at [FETCH], below, will never observe a biased encoding (*101b).
1749 // If this invariant is not held we risk exclusion (safety) failure.
1750 if (UseBiasedLocking && !UseOptoBiasInlining) {
1751 biased_locking_enter(boxReg, objReg, tmpReg, scrReg, false, DONE_LABEL, NULL, counters);
1752 }
1753
1754 #if INCLUDE_RTM_OPT
1755 if (UseRTMForStackLocks && use_rtm) {
1756 rtm_stack_locking(objReg, tmpReg, scrReg, cx2Reg,
1757 stack_rtm_counters, method_data, profile_rtm,
1758 DONE_LABEL, IsInflated);
1759 }
1760 #endif // INCLUDE_RTM_OPT
1761
1762 movptr(tmpReg, Address(objReg, oopDesc::mark_offset_in_bytes())); // [FETCH]
1763 testptr(tmpReg, markOopDesc::monitor_value); // inflated vs stack-locked|neutral|biased
1764 jccb(Assembler::notZero, IsInflated);
1765
1766 // Attempt stack-locking ...
1767 orptr (tmpReg, markOopDesc::unlocked_value);
1768 movptr(Address(boxReg, 0), tmpReg); // Anticipate successful CAS
1769 if (os::is_MP()) {
1770 lock();
1771 }
1772 cmpxchgptr(boxReg, Address(objReg, oopDesc::mark_offset_in_bytes())); // Updates tmpReg
1773 if (counters != NULL) {
1774 cond_inc32(Assembler::equal,
1775 ExternalAddress((address)counters->fast_path_entry_count_addr()));
1776 }
1777 jcc(Assembler::equal, DONE_LABEL); // Success
1778
1779 // Recursive locking.
1780 // The object is stack-locked: markword contains stack pointer to BasicLock.
1781 // Locked by current thread if difference with current SP is less than one page.
1782 subptr(tmpReg, rsp);
1783 // Next instruction set ZFlag == 1 (Success) if difference is less then one page.
1784 andptr(tmpReg, (int32_t) (NOT_LP64(0xFFFFF003) LP64_ONLY(7 - os::vm_page_size())) );
1785 movptr(Address(boxReg, 0), tmpReg);
1786 if (counters != NULL) {
1787 cond_inc32(Assembler::equal,
1788 ExternalAddress((address)counters->fast_path_entry_count_addr()));
1789 }
1790 jmp(DONE_LABEL);
1791
1792 bind(IsInflated);
1793 // The object is inflated. tmpReg contains pointer to ObjectMonitor* + markOopDesc::monitor_value
1794
1795 #if INCLUDE_RTM_OPT
1796 // Use the same RTM locking code in 32- and 64-bit VM.
1797 if (use_rtm) {
1798 rtm_inflated_locking(objReg, boxReg, tmpReg, scrReg, cx1Reg, cx2Reg,
1799 rtm_counters, method_data, profile_rtm, DONE_LABEL);
1800 } else {
1801 #endif // INCLUDE_RTM_OPT
1802
1803 #ifndef _LP64
1804 // The object is inflated.
1805
1806 // boxReg refers to the on-stack BasicLock in the current frame.
1807 // We'd like to write:
1808 // set box->_displaced_header = markOopDesc::unused_mark(). Any non-0 value suffices.
1809 // This is convenient but results a ST-before-CAS penalty. The following CAS suffers
1810 // additional latency as we have another ST in the store buffer that must drain.
1811
1812 if (EmitSync & 8192) {
1813 movptr(Address(boxReg, 0), 3); // results in ST-before-CAS penalty
1814 get_thread (scrReg);
1815 movptr(boxReg, tmpReg); // consider: LEA box, [tmp-2]
1816 movptr(tmpReg, NULL_WORD); // consider: xor vs mov
1817 if (os::is_MP()) {
1818 lock();
1819 }
1820 cmpxchgptr(scrReg, Address(boxReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)));
1821 } else
1822 if ((EmitSync & 128) == 0) { // avoid ST-before-CAS
1823 // register juggle because we need tmpReg for cmpxchgptr below
1824 movptr(scrReg, boxReg);
1825 movptr(boxReg, tmpReg); // consider: LEA box, [tmp-2]
1826
1827 // Using a prefetchw helps avoid later RTS->RTO upgrades and cache probes
1828 if ((EmitSync & 2048) && VM_Version::supports_3dnow_prefetch() && os::is_MP()) {
1829 // prefetchw [eax + Offset(_owner)-2]
1830 prefetchw(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)));
1831 }
1832
1833 if ((EmitSync & 64) == 0) {
1834 // Optimistic form: consider XORL tmpReg,tmpReg
1835 movptr(tmpReg, NULL_WORD);
1836 } else {
1837 // Can suffer RTS->RTO upgrades on shared or cold $ lines
1838 // Test-And-CAS instead of CAS
1839 movptr(tmpReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); // rax, = m->_owner
1840 testptr(tmpReg, tmpReg); // Locked ?
1841 jccb (Assembler::notZero, DONE_LABEL);
1842 }
1843
1844 // Appears unlocked - try to swing _owner from null to non-null.
1845 // Ideally, I'd manifest "Self" with get_thread and then attempt
1846 // to CAS the register containing Self into m->Owner.
1847 // But we don't have enough registers, so instead we can either try to CAS
1848 // rsp or the address of the box (in scr) into &m->owner. If the CAS succeeds
1849 // we later store "Self" into m->Owner. Transiently storing a stack address
1850 // (rsp or the address of the box) into m->owner is harmless.
1851 // Invariant: tmpReg == 0. tmpReg is EAX which is the implicit cmpxchg comparand.
1852 if (os::is_MP()) {
1853 lock();
1854 }
1855 cmpxchgptr(scrReg, Address(boxReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)));
1856 movptr(Address(scrReg, 0), 3); // box->_displaced_header = 3
1857 // If we weren't able to swing _owner from NULL to the BasicLock
1858 // then take the slow path.
1859 jccb (Assembler::notZero, DONE_LABEL);
1860 // update _owner from BasicLock to thread
1861 get_thread (scrReg); // beware: clobbers ICCs
1862 movptr(Address(boxReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), scrReg);
1863 xorptr(boxReg, boxReg); // set icc.ZFlag = 1 to indicate success
1864
1865 // If the CAS fails we can either retry or pass control to the slow-path.
1866 // We use the latter tactic.
1867 // Pass the CAS result in the icc.ZFlag into DONE_LABEL
1868 // If the CAS was successful ...
1869 // Self has acquired the lock
1870 // Invariant: m->_recursions should already be 0, so we don't need to explicitly set it.
1871 // Intentional fall-through into DONE_LABEL ...
1872 } else {
1873 movptr(Address(boxReg, 0), intptr_t(markOopDesc::unused_mark())); // results in ST-before-CAS penalty
1874 movptr(boxReg, tmpReg);
1875
1876 // Using a prefetchw helps avoid later RTS->RTO upgrades and cache probes
1877 if ((EmitSync & 2048) && VM_Version::supports_3dnow_prefetch() && os::is_MP()) {
1878 // prefetchw [eax + Offset(_owner)-2]
1879 prefetchw(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)));
1880 }
1881
1882 if ((EmitSync & 64) == 0) {
1883 // Optimistic form
1884 xorptr (tmpReg, tmpReg);
1885 } else {
1886 // Can suffer RTS->RTO upgrades on shared or cold $ lines
1887 movptr(tmpReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); // rax, = m->_owner
1888 testptr(tmpReg, tmpReg); // Locked ?
1889 jccb (Assembler::notZero, DONE_LABEL);
1890 }
1891
1892 // Appears unlocked - try to swing _owner from null to non-null.
1893 // Use either "Self" (in scr) or rsp as thread identity in _owner.
1894 // Invariant: tmpReg == 0. tmpReg is EAX which is the implicit cmpxchg comparand.
1895 get_thread (scrReg);
1896 if (os::is_MP()) {
1897 lock();
1898 }
1899 cmpxchgptr(scrReg, Address(boxReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)));
1900
1901 // If the CAS fails we can either retry or pass control to the slow-path.
1902 // We use the latter tactic.
1903 // Pass the CAS result in the icc.ZFlag into DONE_LABEL
1904 // If the CAS was successful ...
1905 // Self has acquired the lock
1906 // Invariant: m->_recursions should already be 0, so we don't need to explicitly set it.
1907 // Intentional fall-through into DONE_LABEL ...
1908 }
1909 #else // _LP64
1910 // It's inflated
1911 movq(scrReg, tmpReg);
1912 xorq(tmpReg, tmpReg);
1913
1914 if (os::is_MP()) {
1915 lock();
1916 }
1917 cmpxchgptr(r15_thread, Address(scrReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)));
1918 // Unconditionally set box->_displaced_header = markOopDesc::unused_mark().
1919 // Without cast to int32_t movptr will destroy r10 which is typically obj.
1920 movptr(Address(boxReg, 0), (int32_t)intptr_t(markOopDesc::unused_mark()));
1921 // Intentional fall-through into DONE_LABEL ...
1922 // Propagate ICC.ZF from CAS above into DONE_LABEL.
1923 #endif // _LP64
1924 #if INCLUDE_RTM_OPT
1925 } // use_rtm()
1926 #endif
1927 // DONE_LABEL is a hot target - we'd really like to place it at the
1928 // start of cache line by padding with NOPs.
1929 // See the AMD and Intel software optimization manuals for the
1930 // most efficient "long" NOP encodings.
1931 // Unfortunately none of our alignment mechanisms suffice.
1932 bind(DONE_LABEL);
1933
1934 // At DONE_LABEL the icc ZFlag is set as follows ...
1935 // Fast_Unlock uses the same protocol.
1936 // ZFlag == 1 -> Success
1937 // ZFlag == 0 -> Failure - force control through the slow-path
1938 }
1939 }
1940
1941 // obj: object to unlock
1942 // box: box address (displaced header location), killed. Must be EAX.
1943 // tmp: killed, cannot be obj nor box.
1944 //
1945 // Some commentary on balanced locking:
1946 //
1947 // Fast_Lock and Fast_Unlock are emitted only for provably balanced lock sites.
1948 // Methods that don't have provably balanced locking are forced to run in the
1949 // interpreter - such methods won't be compiled to use fast_lock and fast_unlock.
1950 // The interpreter provides two properties:
1951 // I1: At return-time the interpreter automatically and quietly unlocks any
1952 // objects acquired the current activation (frame). Recall that the
1953 // interpreter maintains an on-stack list of locks currently held by
1954 // a frame.
1955 // I2: If a method attempts to unlock an object that is not held by the
1956 // the frame the interpreter throws IMSX.
1957 //
1958 // Lets say A(), which has provably balanced locking, acquires O and then calls B().
1959 // B() doesn't have provably balanced locking so it runs in the interpreter.
1960 // Control returns to A() and A() unlocks O. By I1 and I2, above, we know that O
1961 // is still locked by A().
1962 //
1963 // The only other source of unbalanced locking would be JNI. The "Java Native Interface:
1964 // Programmer's Guide and Specification" claims that an object locked by jni_monitorenter
1965 // should not be unlocked by "normal" java-level locking and vice-versa. The specification
1966 // doesn't specify what will occur if a program engages in such mixed-mode locking, however.
1967 // Arguably given that the spec legislates the JNI case as undefined our implementation
1968 // could reasonably *avoid* checking owner in Fast_Unlock().
1969 // In the interest of performance we elide m->Owner==Self check in unlock.
1970 // A perfectly viable alternative is to elide the owner check except when
1971 // Xcheck:jni is enabled.
1972
1973 void MacroAssembler::fast_unlock(Register objReg, Register boxReg, Register tmpReg, bool use_rtm) {
1974 assert(boxReg == rax, "");
1975 assert_different_registers(objReg, boxReg, tmpReg);
1976
1977 if (EmitSync & 4) {
1978 // Disable - inhibit all inlining. Force control through the slow-path
1979 cmpptr (rsp, 0);
1980 } else {
1981 Label DONE_LABEL, Stacked, CheckSucc;
1982
1983 // Critically, the biased locking test must have precedence over
1984 // and appear before the (box->dhw == 0) recursive stack-lock test.
1985 if (UseBiasedLocking && !UseOptoBiasInlining) {
1986 biased_locking_exit(objReg, tmpReg, DONE_LABEL);
1987 }
1988
1989 #if INCLUDE_RTM_OPT
1990 if (UseRTMForStackLocks && use_rtm) {
1991 assert(!UseBiasedLocking, "Biased locking is not supported with RTM locking");
1992 Label L_regular_unlock;
1993 movptr(tmpReg, Address(objReg, oopDesc::mark_offset_in_bytes())); // fetch markword
1994 andptr(tmpReg, markOopDesc::biased_lock_mask_in_place); // look at 3 lock bits
1995 cmpptr(tmpReg, markOopDesc::unlocked_value); // bits = 001 unlocked
1996 jccb(Assembler::notEqual, L_regular_unlock); // if !HLE RegularLock
1997 xend(); // otherwise end...
1998 jmp(DONE_LABEL); // ... and we're done
1999 bind(L_regular_unlock);
2000 }
2001 #endif
2002
2003 cmpptr(Address(boxReg, 0), (int32_t)NULL_WORD); // Examine the displaced header
2004 jcc (Assembler::zero, DONE_LABEL); // 0 indicates recursive stack-lock
2005 movptr(tmpReg, Address(objReg, oopDesc::mark_offset_in_bytes())); // Examine the object's markword
2006 testptr(tmpReg, markOopDesc::monitor_value); // Inflated?
2007 jccb (Assembler::zero, Stacked);
2008
2009 // It's inflated.
2010 #if INCLUDE_RTM_OPT
2011 if (use_rtm) {
2012 Label L_regular_inflated_unlock;
2013 int owner_offset = OM_OFFSET_NO_MONITOR_VALUE_TAG(owner);
2014 movptr(boxReg, Address(tmpReg, owner_offset));
2015 testptr(boxReg, boxReg);
2016 jccb(Assembler::notZero, L_regular_inflated_unlock);
2017 xend();
2018 jmpb(DONE_LABEL);
2019 bind(L_regular_inflated_unlock);
2020 }
2021 #endif
2022
2023 // Despite our balanced locking property we still check that m->_owner == Self
2024 // as java routines or native JNI code called by this thread might
2025 // have released the lock.
2026 // Refer to the comments in synchronizer.cpp for how we might encode extra
2027 // state in _succ so we can avoid fetching EntryList|cxq.
2028 //
2029 // I'd like to add more cases in fast_lock() and fast_unlock() --
2030 // such as recursive enter and exit -- but we have to be wary of
2031 // I$ bloat, T$ effects and BP$ effects.
2032 //
2033 // If there's no contention try a 1-0 exit. That is, exit without
2034 // a costly MEMBAR or CAS. See synchronizer.cpp for details on how
2035 // we detect and recover from the race that the 1-0 exit admits.
2036 //
2037 // Conceptually Fast_Unlock() must execute a STST|LDST "release" barrier
2038 // before it STs null into _owner, releasing the lock. Updates
2039 // to data protected by the critical section must be visible before
2040 // we drop the lock (and thus before any other thread could acquire
2041 // the lock and observe the fields protected by the lock).
2042 // IA32's memory-model is SPO, so STs are ordered with respect to
2043 // each other and there's no need for an explicit barrier (fence).
2044 // See also http://gee.cs.oswego.edu/dl/jmm/cookbook.html.
2045 #ifndef _LP64
2046 get_thread (boxReg);
2047 if ((EmitSync & 4096) && VM_Version::supports_3dnow_prefetch() && os::is_MP()) {
2048 // prefetchw [ebx + Offset(_owner)-2]
2049 prefetchw(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)));
2050 }
2051
2052 // Note that we could employ various encoding schemes to reduce
2053 // the number of loads below (currently 4) to just 2 or 3.
2054 // Refer to the comments in synchronizer.cpp.
2055 // In practice the chain of fetches doesn't seem to impact performance, however.
2056 xorptr(boxReg, boxReg);
2057 if ((EmitSync & 65536) == 0 && (EmitSync & 256)) {
2058 // Attempt to reduce branch density - AMD's branch predictor.
2059 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(recursions)));
2060 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(EntryList)));
2061 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(cxq)));
2062 jccb (Assembler::notZero, DONE_LABEL);
2063 movptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), NULL_WORD);
2064 jmpb (DONE_LABEL);
2065 } else {
2066 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(recursions)));
2067 jccb (Assembler::notZero, DONE_LABEL);
2068 movptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(EntryList)));
2069 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(cxq)));
2070 jccb (Assembler::notZero, CheckSucc);
2071 movptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), NULL_WORD);
2072 jmpb (DONE_LABEL);
2073 }
2074
2075 // The Following code fragment (EmitSync & 65536) improves the performance of
2076 // contended applications and contended synchronization microbenchmarks.
2077 // Unfortunately the emission of the code - even though not executed - causes regressions
2078 // in scimark and jetstream, evidently because of $ effects. Replacing the code
2079 // with an equal number of never-executed NOPs results in the same regression.
2080 // We leave it off by default.
2081
2082 if ((EmitSync & 65536) != 0) {
2083 Label LSuccess, LGoSlowPath ;
2084
2085 bind (CheckSucc);
2086
2087 // Optional pre-test ... it's safe to elide this
2088 cmpptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(succ)), (int32_t)NULL_WORD);
2089 jccb(Assembler::zero, LGoSlowPath);
2090
2091 // We have a classic Dekker-style idiom:
2092 // ST m->_owner = 0 ; MEMBAR; LD m->_succ
2093 // There are a number of ways to implement the barrier:
2094 // (1) lock:andl &m->_owner, 0
2095 // is fast, but mask doesn't currently support the "ANDL M,IMM32" form.
2096 // LOCK: ANDL [ebx+Offset(_Owner)-2], 0
2097 // Encodes as 81 31 OFF32 IMM32 or 83 63 OFF8 IMM8
2098 // (2) If supported, an explicit MFENCE is appealing.
2099 // In older IA32 processors MFENCE is slower than lock:add or xchg
2100 // particularly if the write-buffer is full as might be the case if
2101 // if stores closely precede the fence or fence-equivalent instruction.
2102 // See https://blogs.oracle.com/dave/entry/instruction_selection_for_volatile_fences
2103 // as the situation has changed with Nehalem and Shanghai.
2104 // (3) In lieu of an explicit fence, use lock:addl to the top-of-stack
2105 // The $lines underlying the top-of-stack should be in M-state.
2106 // The locked add instruction is serializing, of course.
2107 // (4) Use xchg, which is serializing
2108 // mov boxReg, 0; xchgl boxReg, [tmpReg + Offset(_owner)-2] also works
2109 // (5) ST m->_owner = 0 and then execute lock:orl &m->_succ, 0.
2110 // The integer condition codes will tell us if succ was 0.
2111 // Since _succ and _owner should reside in the same $line and
2112 // we just stored into _owner, it's likely that the $line
2113 // remains in M-state for the lock:orl.
2114 //
2115 // We currently use (3), although it's likely that switching to (2)
2116 // is correct for the future.
2117
2118 movptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), NULL_WORD);
2119 if (os::is_MP()) {
2120 lock(); addptr(Address(rsp, 0), 0);
2121 }
2122 // Ratify _succ remains non-null
2123 cmpptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(succ)), 0);
2124 jccb (Assembler::notZero, LSuccess);
2125
2126 xorptr(boxReg, boxReg); // box is really EAX
2127 if (os::is_MP()) { lock(); }
2128 cmpxchgptr(rsp, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)));
2129 // There's no successor so we tried to regrab the lock with the
2130 // placeholder value. If that didn't work, then another thread
2131 // grabbed the lock so we're done (and exit was a success).
2132 jccb (Assembler::notEqual, LSuccess);
2133 // Since we're low on registers we installed rsp as a placeholding in _owner.
2134 // Now install Self over rsp. This is safe as we're transitioning from
2135 // non-null to non=null
2136 get_thread (boxReg);
2137 movptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), boxReg);
2138 // Intentional fall-through into LGoSlowPath ...
2139
2140 bind (LGoSlowPath);
2141 orptr(boxReg, 1); // set ICC.ZF=0 to indicate failure
2142 jmpb (DONE_LABEL);
2143
2144 bind (LSuccess);
2145 xorptr(boxReg, boxReg); // set ICC.ZF=1 to indicate success
2146 jmpb (DONE_LABEL);
2147 }
2148
2149 bind (Stacked);
2150 // It's not inflated and it's not recursively stack-locked and it's not biased.
2151 // It must be stack-locked.
2152 // Try to reset the header to displaced header.
2153 // The "box" value on the stack is stable, so we can reload
2154 // and be assured we observe the same value as above.
2155 movptr(tmpReg, Address(boxReg, 0));
2156 if (os::is_MP()) {
2157 lock();
2158 }
2159 cmpxchgptr(tmpReg, Address(objReg, oopDesc::mark_offset_in_bytes())); // Uses RAX which is box
2160 // Intention fall-thru into DONE_LABEL
2161
2162 // DONE_LABEL is a hot target - we'd really like to place it at the
2163 // start of cache line by padding with NOPs.
2164 // See the AMD and Intel software optimization manuals for the
2165 // most efficient "long" NOP encodings.
2166 // Unfortunately none of our alignment mechanisms suffice.
2167 if ((EmitSync & 65536) == 0) {
2168 bind (CheckSucc);
2169 }
2170 #else // _LP64
2171 // It's inflated
2172 if (EmitSync & 1024) {
2173 // Emit code to check that _owner == Self
2174 // We could fold the _owner test into subsequent code more efficiently
2175 // than using a stand-alone check, but since _owner checking is off by
2176 // default we don't bother. We also might consider predicating the
2177 // _owner==Self check on Xcheck:jni or running on a debug build.
2178 movptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)));
2179 xorptr(boxReg, r15_thread);
2180 } else {
2181 xorptr(boxReg, boxReg);
2182 }
2183 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(recursions)));
2184 jccb (Assembler::notZero, DONE_LABEL);
2185 movptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(cxq)));
2186 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(EntryList)));
2187 jccb (Assembler::notZero, CheckSucc);
2188 movptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), (int32_t)NULL_WORD);
2189 jmpb (DONE_LABEL);
2190
2191 if ((EmitSync & 65536) == 0) {
2192 // Try to avoid passing control into the slow_path ...
2193 Label LSuccess, LGoSlowPath ;
2194 bind (CheckSucc);
2195
2196 // The following optional optimization can be elided if necessary
2197 // Effectively: if (succ == null) goto SlowPath
2198 // The code reduces the window for a race, however,
2199 // and thus benefits performance.
2200 cmpptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(succ)), (int32_t)NULL_WORD);
2201 jccb (Assembler::zero, LGoSlowPath);
2202
2203 xorptr(boxReg, boxReg);
2204 if ((EmitSync & 16) && os::is_MP()) {
2205 xchgptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)));
2206 } else {
2207 movptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), (int32_t)NULL_WORD);
2208 if (os::is_MP()) {
2209 // Memory barrier/fence
2210 // Dekker pivot point -- fulcrum : ST Owner; MEMBAR; LD Succ
2211 // Instead of MFENCE we use a dummy locked add of 0 to the top-of-stack.
2212 // This is faster on Nehalem and AMD Shanghai/Barcelona.
2213 // See https://blogs.oracle.com/dave/entry/instruction_selection_for_volatile_fences
2214 // We might also restructure (ST Owner=0;barrier;LD _Succ) to
2215 // (mov box,0; xchgq box, &m->Owner; LD _succ) .
2216 lock(); addl(Address(rsp, 0), 0);
2217 }
2218 }
2219 cmpptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(succ)), (int32_t)NULL_WORD);
2220 jccb (Assembler::notZero, LSuccess);
2221
2222 // Rare inopportune interleaving - race.
2223 // The successor vanished in the small window above.
2224 // The lock is contended -- (cxq|EntryList) != null -- and there's no apparent successor.
2225 // We need to ensure progress and succession.
2226 // Try to reacquire the lock.
2227 // If that fails then the new owner is responsible for succession and this
2228 // thread needs to take no further action and can exit via the fast path (success).
2229 // If the re-acquire succeeds then pass control into the slow path.
2230 // As implemented, this latter mode is horrible because we generated more
2231 // coherence traffic on the lock *and* artifically extended the critical section
2232 // length while by virtue of passing control into the slow path.
2233
2234 // box is really RAX -- the following CMPXCHG depends on that binding
2235 // cmpxchg R,[M] is equivalent to rax = CAS(M,rax,R)
2236 if (os::is_MP()) { lock(); }
2237 cmpxchgptr(r15_thread, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)));
2238 // There's no successor so we tried to regrab the lock.
2239 // If that didn't work, then another thread grabbed the
2240 // lock so we're done (and exit was a success).
2241 jccb (Assembler::notEqual, LSuccess);
2242 // Intentional fall-through into slow-path
2243
2244 bind (LGoSlowPath);
2245 orl (boxReg, 1); // set ICC.ZF=0 to indicate failure
2246 jmpb (DONE_LABEL);
2247
2248 bind (LSuccess);
2249 testl (boxReg, 0); // set ICC.ZF=1 to indicate success
2250 jmpb (DONE_LABEL);
2251 }
2252
2253 bind (Stacked);
2254 movptr(tmpReg, Address (boxReg, 0)); // re-fetch
2255 if (os::is_MP()) { lock(); }
2256 cmpxchgptr(tmpReg, Address(objReg, oopDesc::mark_offset_in_bytes())); // Uses RAX which is box
2257
2258 if (EmitSync & 65536) {
2259 bind (CheckSucc);
2260 }
2261 #endif
2262 bind(DONE_LABEL);
2263 }
2264 }
2265 #endif // COMPILER2
2266
2267 void MacroAssembler::c2bool(Register x) {
2268 // implements x == 0 ? 0 : 1
2269 // note: must only look at least-significant byte of x
2270 // since C-style booleans are stored in one byte
2271 // only! (was bug)
2272 andl(x, 0xFF);
2273 setb(Assembler::notZero, x);
2274 }
2275
2276 // Wouldn't need if AddressLiteral version had new name
2277 void MacroAssembler::call(Label& L, relocInfo::relocType rtype) {
2278 Assembler::call(L, rtype);
2279 }
2280
2281 void MacroAssembler::call(Register entry) {
2282 Assembler::call(entry);
2283 }
2284
2285 void MacroAssembler::call(AddressLiteral entry) {
2286 if (reachable(entry)) {
2287 Assembler::call_literal(entry.target(), entry.rspec());
2288 } else {
2289 lea(rscratch1, entry);
2290 Assembler::call(rscratch1);
2291 }
2292 }
2293
2294 void MacroAssembler::ic_call(address entry, jint method_index) {
2295 RelocationHolder rh = virtual_call_Relocation::spec(pc(), method_index);
2296 movptr(rax, (intptr_t)Universe::non_oop_word());
2297 call(AddressLiteral(entry, rh));
2298 }
2299
2300 // Implementation of call_VM versions
2301
2302 void MacroAssembler::call_VM(Register oop_result,
2303 address entry_point,
2304 bool check_exceptions) {
2305 Label C, E;
2306 call(C, relocInfo::none);
2307 jmp(E);
2308
2309 bind(C);
2310 call_VM_helper(oop_result, entry_point, 0, check_exceptions);
2311 ret(0);
2312
2313 bind(E);
2314 }
2315
2316 void MacroAssembler::call_VM(Register oop_result,
2317 address entry_point,
2318 Register arg_1,
2319 bool check_exceptions) {
2320 Label C, E;
2321 call(C, relocInfo::none);
2322 jmp(E);
2323
2324 bind(C);
2325 pass_arg1(this, arg_1);
2326 call_VM_helper(oop_result, entry_point, 1, check_exceptions);
2327 ret(0);
2328
2329 bind(E);
2330 }
2331
2332 void MacroAssembler::call_VM(Register oop_result,
2333 address entry_point,
2334 Register arg_1,
2335 Register arg_2,
2336 bool check_exceptions) {
2337 Label C, E;
2338 call(C, relocInfo::none);
2339 jmp(E);
2340
2341 bind(C);
2342
2343 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg"));
2344
2345 pass_arg2(this, arg_2);
2346 pass_arg1(this, arg_1);
2347 call_VM_helper(oop_result, entry_point, 2, check_exceptions);
2348 ret(0);
2349
2350 bind(E);
2351 }
2352
2353 void MacroAssembler::call_VM(Register oop_result,
2354 address entry_point,
2355 Register arg_1,
2356 Register arg_2,
2357 Register arg_3,
2358 bool check_exceptions) {
2359 Label C, E;
2360 call(C, relocInfo::none);
2361 jmp(E);
2362
2363 bind(C);
2364
2365 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg"));
2366 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg"));
2367 pass_arg3(this, arg_3);
2368
2369 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg"));
2370 pass_arg2(this, arg_2);
2371
2372 pass_arg1(this, arg_1);
2373 call_VM_helper(oop_result, entry_point, 3, check_exceptions);
2374 ret(0);
2375
2376 bind(E);
2377 }
2378
2379 void MacroAssembler::call_VM(Register oop_result,
2380 Register last_java_sp,
2381 address entry_point,
2382 int number_of_arguments,
2383 bool check_exceptions) {
2384 Register thread = LP64_ONLY(r15_thread) NOT_LP64(noreg);
2385 call_VM_base(oop_result, thread, last_java_sp, entry_point, number_of_arguments, check_exceptions);
2386 }
2387
2388 void MacroAssembler::call_VM(Register oop_result,
2389 Register last_java_sp,
2390 address entry_point,
2391 Register arg_1,
2392 bool check_exceptions) {
2393 pass_arg1(this, arg_1);
2394 call_VM(oop_result, last_java_sp, entry_point, 1, check_exceptions);
2395 }
2396
2397 void MacroAssembler::call_VM(Register oop_result,
2398 Register last_java_sp,
2399 address entry_point,
2400 Register arg_1,
2401 Register arg_2,
2402 bool check_exceptions) {
2403
2404 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg"));
2405 pass_arg2(this, arg_2);
2406 pass_arg1(this, arg_1);
2407 call_VM(oop_result, last_java_sp, entry_point, 2, check_exceptions);
2408 }
2409
2410 void MacroAssembler::call_VM(Register oop_result,
2411 Register last_java_sp,
2412 address entry_point,
2413 Register arg_1,
2414 Register arg_2,
2415 Register arg_3,
2416 bool check_exceptions) {
2417 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg"));
2418 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg"));
2419 pass_arg3(this, arg_3);
2420 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg"));
2421 pass_arg2(this, arg_2);
2422 pass_arg1(this, arg_1);
2423 call_VM(oop_result, last_java_sp, entry_point, 3, check_exceptions);
2424 }
2425
2426 void MacroAssembler::super_call_VM(Register oop_result,
2427 Register last_java_sp,
2428 address entry_point,
2429 int number_of_arguments,
2430 bool check_exceptions) {
2431 Register thread = LP64_ONLY(r15_thread) NOT_LP64(noreg);
2432 MacroAssembler::call_VM_base(oop_result, thread, last_java_sp, entry_point, number_of_arguments, check_exceptions);
2433 }
2434
2435 void MacroAssembler::super_call_VM(Register oop_result,
2436 Register last_java_sp,
2437 address entry_point,
2438 Register arg_1,
2439 bool check_exceptions) {
2440 pass_arg1(this, arg_1);
2441 super_call_VM(oop_result, last_java_sp, entry_point, 1, check_exceptions);
2442 }
2443
2444 void MacroAssembler::super_call_VM(Register oop_result,
2445 Register last_java_sp,
2446 address entry_point,
2447 Register arg_1,
2448 Register arg_2,
2449 bool check_exceptions) {
2450
2451 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg"));
2452 pass_arg2(this, arg_2);
2453 pass_arg1(this, arg_1);
2454 super_call_VM(oop_result, last_java_sp, entry_point, 2, check_exceptions);
2455 }
2456
2457 void MacroAssembler::super_call_VM(Register oop_result,
2458 Register last_java_sp,
2459 address entry_point,
2460 Register arg_1,
2461 Register arg_2,
2462 Register arg_3,
2463 bool check_exceptions) {
2464 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg"));
2465 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg"));
2466 pass_arg3(this, arg_3);
2467 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg"));
2468 pass_arg2(this, arg_2);
2469 pass_arg1(this, arg_1);
2470 super_call_VM(oop_result, last_java_sp, entry_point, 3, check_exceptions);
2471 }
2472
2473 void MacroAssembler::call_VM_base(Register oop_result,
2474 Register java_thread,
2475 Register last_java_sp,
2476 address entry_point,
2477 int number_of_arguments,
2478 bool check_exceptions) {
2479 // determine java_thread register
2480 if (!java_thread->is_valid()) {
2481 #ifdef _LP64
2482 java_thread = r15_thread;
2483 #else
2484 java_thread = rdi;
2485 get_thread(java_thread);
2486 #endif // LP64
2487 }
2488 // determine last_java_sp register
2489 if (!last_java_sp->is_valid()) {
2490 last_java_sp = rsp;
2491 }
2492 // debugging support
2493 assert(number_of_arguments >= 0 , "cannot have negative number of arguments");
2494 LP64_ONLY(assert(java_thread == r15_thread, "unexpected register"));
2495 #ifdef ASSERT
2496 // TraceBytecodes does not use r12 but saves it over the call, so don't verify
2497 // r12 is the heapbase.
2498 LP64_ONLY(if ((UseCompressedOops || UseCompressedClassPointers) && !TraceBytecodes) verify_heapbase("call_VM_base: heap base corrupted?");)
2499 #endif // ASSERT
2500
2501 assert(java_thread != oop_result , "cannot use the same register for java_thread & oop_result");
2502 assert(java_thread != last_java_sp, "cannot use the same register for java_thread & last_java_sp");
2503
2504 // push java thread (becomes first argument of C function)
2505
2506 NOT_LP64(push(java_thread); number_of_arguments++);
2507 LP64_ONLY(mov(c_rarg0, r15_thread));
2508
2509 // set last Java frame before call
2510 assert(last_java_sp != rbp, "can't use ebp/rbp");
2511
2512 // Only interpreter should have to set fp
2513 set_last_Java_frame(java_thread, last_java_sp, rbp, NULL);
2514
2515 // do the call, remove parameters
2516 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
2517
2518 // restore the thread (cannot use the pushed argument since arguments
2519 // may be overwritten by C code generated by an optimizing compiler);
2520 // however can use the register value directly if it is callee saved.
2521 if (LP64_ONLY(true ||) java_thread == rdi || java_thread == rsi) {
2522 // rdi & rsi (also r15) are callee saved -> nothing to do
2523 #ifdef ASSERT
2524 guarantee(java_thread != rax, "change this code");
2525 push(rax);
2526 { Label L;
2527 get_thread(rax);
2528 cmpptr(java_thread, rax);
2529 jcc(Assembler::equal, L);
2530 STOP("MacroAssembler::call_VM_base: rdi not callee saved?");
2531 bind(L);
2532 }
2533 pop(rax);
2534 #endif
2535 } else {
2536 get_thread(java_thread);
2537 }
2538 // reset last Java frame
2539 // Only interpreter should have to clear fp
2540 reset_last_Java_frame(java_thread, true);
2541
2542 // C++ interp handles this in the interpreter
2543 check_and_handle_popframe(java_thread);
2544 check_and_handle_earlyret(java_thread);
2545
2546 if (check_exceptions) {
2547 // check for pending exceptions (java_thread is set upon return)
2548 cmpptr(Address(java_thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
2549 #ifndef _LP64
2550 jump_cc(Assembler::notEqual,
2551 RuntimeAddress(StubRoutines::forward_exception_entry()));
2552 #else
2553 // This used to conditionally jump to forward_exception however it is
2554 // possible if we relocate that the branch will not reach. So we must jump
2555 // around so we can always reach
2556
2557 Label ok;
2558 jcc(Assembler::equal, ok);
2559 jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
2560 bind(ok);
2561 #endif // LP64
2562 }
2563
2564 // get oop result if there is one and reset the value in the thread
2565 if (oop_result->is_valid()) {
2566 get_vm_result(oop_result, java_thread);
2567 }
2568 }
2569
2570 void MacroAssembler::call_VM_helper(Register oop_result, address entry_point, int number_of_arguments, bool check_exceptions) {
2571
2572 // Calculate the value for last_Java_sp
2573 // somewhat subtle. call_VM does an intermediate call
2574 // which places a return address on the stack just under the
2575 // stack pointer as the user finsihed with it. This allows
2576 // use to retrieve last_Java_pc from last_Java_sp[-1].
2577 // On 32bit we then have to push additional args on the stack to accomplish
2578 // the actual requested call. On 64bit call_VM only can use register args
2579 // so the only extra space is the return address that call_VM created.
2580 // This hopefully explains the calculations here.
2581
2582 #ifdef _LP64
2583 // We've pushed one address, correct last_Java_sp
2584 lea(rax, Address(rsp, wordSize));
2585 #else
2586 lea(rax, Address(rsp, (1 + number_of_arguments) * wordSize));
2587 #endif // LP64
2588
2589 call_VM_base(oop_result, noreg, rax, entry_point, number_of_arguments, check_exceptions);
2590
2591 }
2592
2593 // Use this method when MacroAssembler version of call_VM_leaf_base() should be called from Interpreter.
2594 void MacroAssembler::call_VM_leaf0(address entry_point) {
2595 MacroAssembler::call_VM_leaf_base(entry_point, 0);
2596 }
2597
2598 void MacroAssembler::call_VM_leaf(address entry_point, int number_of_arguments) {
2599 call_VM_leaf_base(entry_point, number_of_arguments);
2600 }
2601
2602 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0) {
2603 pass_arg0(this, arg_0);
2604 call_VM_leaf(entry_point, 1);
2605 }
2606
2607 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0, Register arg_1) {
2608
2609 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg"));
2610 pass_arg1(this, arg_1);
2611 pass_arg0(this, arg_0);
2612 call_VM_leaf(entry_point, 2);
2613 }
2614
2615 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2) {
2616 LP64_ONLY(assert(arg_0 != c_rarg2, "smashed arg"));
2617 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg"));
2618 pass_arg2(this, arg_2);
2619 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg"));
2620 pass_arg1(this, arg_1);
2621 pass_arg0(this, arg_0);
2622 call_VM_leaf(entry_point, 3);
2623 }
2624
2625 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0) {
2626 pass_arg0(this, arg_0);
2627 MacroAssembler::call_VM_leaf_base(entry_point, 1);
2628 }
2629
2630 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1) {
2631
2632 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg"));
2633 pass_arg1(this, arg_1);
2634 pass_arg0(this, arg_0);
2635 MacroAssembler::call_VM_leaf_base(entry_point, 2);
2636 }
2637
2638 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2) {
2639 LP64_ONLY(assert(arg_0 != c_rarg2, "smashed arg"));
2640 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg"));
2641 pass_arg2(this, arg_2);
2642 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg"));
2643 pass_arg1(this, arg_1);
2644 pass_arg0(this, arg_0);
2645 MacroAssembler::call_VM_leaf_base(entry_point, 3);
2646 }
2647
2648 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2, Register arg_3) {
2649 LP64_ONLY(assert(arg_0 != c_rarg3, "smashed arg"));
2650 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg"));
2651 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg"));
2652 pass_arg3(this, arg_3);
2653 LP64_ONLY(assert(arg_0 != c_rarg2, "smashed arg"));
2654 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg"));
2655 pass_arg2(this, arg_2);
2656 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg"));
2657 pass_arg1(this, arg_1);
2658 pass_arg0(this, arg_0);
2659 MacroAssembler::call_VM_leaf_base(entry_point, 4);
2660 }
2661
2662 void MacroAssembler::get_vm_result(Register oop_result, Register java_thread) {
2663 movptr(oop_result, Address(java_thread, JavaThread::vm_result_offset()));
2664 movptr(Address(java_thread, JavaThread::vm_result_offset()), NULL_WORD);
2665 verify_oop(oop_result, "broken oop in call_VM_base");
2666 }
2667
2668 void MacroAssembler::get_vm_result_2(Register metadata_result, Register java_thread) {
2669 movptr(metadata_result, Address(java_thread, JavaThread::vm_result_2_offset()));
2670 movptr(Address(java_thread, JavaThread::vm_result_2_offset()), NULL_WORD);
2671 }
2672
2673 void MacroAssembler::check_and_handle_earlyret(Register java_thread) {
2674 }
2675
2676 void MacroAssembler::check_and_handle_popframe(Register java_thread) {
2677 }
2678
2679 void MacroAssembler::cmp32(AddressLiteral src1, int32_t imm) {
2680 if (reachable(src1)) {
2681 cmpl(as_Address(src1), imm);
2682 } else {
2683 lea(rscratch1, src1);
2684 cmpl(Address(rscratch1, 0), imm);
2685 }
2686 }
2687
2688 void MacroAssembler::cmp32(Register src1, AddressLiteral src2) {
2689 assert(!src2.is_lval(), "use cmpptr");
2690 if (reachable(src2)) {
2691 cmpl(src1, as_Address(src2));
2692 } else {
2693 lea(rscratch1, src2);
2694 cmpl(src1, Address(rscratch1, 0));
2695 }
2696 }
2697
2698 void MacroAssembler::cmp32(Register src1, int32_t imm) {
2699 Assembler::cmpl(src1, imm);
2700 }
2701
2702 void MacroAssembler::cmp32(Register src1, Address src2) {
2703 Assembler::cmpl(src1, src2);
2704 }
2705
2706 void MacroAssembler::cmpsd2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less) {
2707 ucomisd(opr1, opr2);
2708
2709 Label L;
2710 if (unordered_is_less) {
2711 movl(dst, -1);
2712 jcc(Assembler::parity, L);
2713 jcc(Assembler::below , L);
2714 movl(dst, 0);
2715 jcc(Assembler::equal , L);
2716 increment(dst);
2717 } else { // unordered is greater
2718 movl(dst, 1);
2719 jcc(Assembler::parity, L);
2720 jcc(Assembler::above , L);
2721 movl(dst, 0);
2722 jcc(Assembler::equal , L);
2723 decrementl(dst);
2724 }
2725 bind(L);
2726 }
2727
2728 void MacroAssembler::cmpss2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less) {
2729 ucomiss(opr1, opr2);
2730
2731 Label L;
2732 if (unordered_is_less) {
2733 movl(dst, -1);
2734 jcc(Assembler::parity, L);
2735 jcc(Assembler::below , L);
2736 movl(dst, 0);
2737 jcc(Assembler::equal , L);
2738 increment(dst);
2739 } else { // unordered is greater
2740 movl(dst, 1);
2741 jcc(Assembler::parity, L);
2742 jcc(Assembler::above , L);
2743 movl(dst, 0);
2744 jcc(Assembler::equal , L);
2745 decrementl(dst);
2746 }
2747 bind(L);
2748 }
2749
2750
2751 void MacroAssembler::cmp8(AddressLiteral src1, int imm) {
2752 if (reachable(src1)) {
2753 cmpb(as_Address(src1), imm);
2754 } else {
2755 lea(rscratch1, src1);
2756 cmpb(Address(rscratch1, 0), imm);
2757 }
2758 }
2759
2760 void MacroAssembler::cmpptr(Register src1, AddressLiteral src2) {
2761 #ifdef _LP64
2762 if (src2.is_lval()) {
2763 movptr(rscratch1, src2);
2764 Assembler::cmpq(src1, rscratch1);
2765 } else if (reachable(src2)) {
2766 cmpq(src1, as_Address(src2));
2767 } else {
2768 lea(rscratch1, src2);
2769 Assembler::cmpq(src1, Address(rscratch1, 0));
2770 }
2771 #else
2772 if (src2.is_lval()) {
2773 cmp_literal32(src1, (int32_t) src2.target(), src2.rspec());
2774 } else {
2775 cmpl(src1, as_Address(src2));
2776 }
2777 #endif // _LP64
2778 }
2779
2780 void MacroAssembler::cmpptr(Address src1, AddressLiteral src2) {
2781 assert(src2.is_lval(), "not a mem-mem compare");
2782 #ifdef _LP64
2783 // moves src2's literal address
2784 movptr(rscratch1, src2);
2785 Assembler::cmpq(src1, rscratch1);
2786 #else
2787 cmp_literal32(src1, (int32_t) src2.target(), src2.rspec());
2788 #endif // _LP64
2789 }
2790
2791 void MacroAssembler::cmpoop(Register src1, Register src2) {
2792 cmpptr(src1, src2);
2793 }
2794
2795 void MacroAssembler::cmpoop(Register src1, Address src2) {
2796 cmpptr(src1, src2);
2797 }
2798
2799 #ifdef _LP64
2800 void MacroAssembler::cmpoop(Register src1, jobject src2) {
2801 movoop(rscratch1, src2);
2802 cmpptr(src1, rscratch1);
2803 }
2804 #endif
2805
2806 void MacroAssembler::locked_cmpxchgptr(Register reg, AddressLiteral adr) {
2807 if (reachable(adr)) {
2808 if (os::is_MP())
2809 lock();
2810 cmpxchgptr(reg, as_Address(adr));
2811 } else {
2812 lea(rscratch1, adr);
2813 if (os::is_MP())
2814 lock();
2815 cmpxchgptr(reg, Address(rscratch1, 0));
2816 }
2817 }
2818
2819 void MacroAssembler::cmpxchgptr(Register reg, Address adr) {
2820 LP64_ONLY(cmpxchgq(reg, adr)) NOT_LP64(cmpxchgl(reg, adr));
2821 }
2822
2823 void MacroAssembler::comisd(XMMRegister dst, AddressLiteral src) {
2824 if (reachable(src)) {
2825 Assembler::comisd(dst, as_Address(src));
2826 } else {
2827 lea(rscratch1, src);
2828 Assembler::comisd(dst, Address(rscratch1, 0));
2829 }
2830 }
2831
2832 void MacroAssembler::comiss(XMMRegister dst, AddressLiteral src) {
2833 if (reachable(src)) {
2834 Assembler::comiss(dst, as_Address(src));
2835 } else {
2836 lea(rscratch1, src);
2837 Assembler::comiss(dst, Address(rscratch1, 0));
2838 }
2839 }
2840
2841
2842 void MacroAssembler::cond_inc32(Condition cond, AddressLiteral counter_addr) {
2843 Condition negated_cond = negate_condition(cond);
2844 Label L;
2845 jcc(negated_cond, L);
2846 pushf(); // Preserve flags
2847 atomic_incl(counter_addr);
2848 popf();
2849 bind(L);
2850 }
2851
2852 int MacroAssembler::corrected_idivl(Register reg) {
2853 // Full implementation of Java idiv and irem; checks for
2854 // special case as described in JVM spec., p.243 & p.271.
2855 // The function returns the (pc) offset of the idivl
2856 // instruction - may be needed for implicit exceptions.
2857 //
2858 // normal case special case
2859 //
2860 // input : rax,: dividend min_int
2861 // reg: divisor (may not be rax,/rdx) -1
2862 //
2863 // output: rax,: quotient (= rax, idiv reg) min_int
2864 // rdx: remainder (= rax, irem reg) 0
2865 assert(reg != rax && reg != rdx, "reg cannot be rax, or rdx register");
2866 const int min_int = 0x80000000;
2867 Label normal_case, special_case;
2868
2869 // check for special case
2870 cmpl(rax, min_int);
2871 jcc(Assembler::notEqual, normal_case);
2872 xorl(rdx, rdx); // prepare rdx for possible special case (where remainder = 0)
2873 cmpl(reg, -1);
2874 jcc(Assembler::equal, special_case);
2875
2876 // handle normal case
2877 bind(normal_case);
2878 cdql();
2879 int idivl_offset = offset();
2880 idivl(reg);
2881
2882 // normal and special case exit
2883 bind(special_case);
2884
2885 return idivl_offset;
2886 }
2887
2888
2889
2890 void MacroAssembler::decrementl(Register reg, int value) {
2891 if (value == min_jint) {subl(reg, value) ; return; }
2892 if (value < 0) { incrementl(reg, -value); return; }
2893 if (value == 0) { ; return; }
2894 if (value == 1 && UseIncDec) { decl(reg) ; return; }
2895 /* else */ { subl(reg, value) ; return; }
2896 }
2897
2898 void MacroAssembler::decrementl(Address dst, int value) {
2899 if (value == min_jint) {subl(dst, value) ; return; }
2900 if (value < 0) { incrementl(dst, -value); return; }
2901 if (value == 0) { ; return; }
2902 if (value == 1 && UseIncDec) { decl(dst) ; return; }
2903 /* else */ { subl(dst, value) ; return; }
2904 }
2905
2906 void MacroAssembler::division_with_shift (Register reg, int shift_value) {
2907 assert (shift_value > 0, "illegal shift value");
2908 Label _is_positive;
2909 testl (reg, reg);
2910 jcc (Assembler::positive, _is_positive);
2911 int offset = (1 << shift_value) - 1 ;
2912
2913 if (offset == 1) {
2914 incrementl(reg);
2915 } else {
2916 addl(reg, offset);
2917 }
2918
2919 bind (_is_positive);
2920 sarl(reg, shift_value);
2921 }
2922
2923 void MacroAssembler::divsd(XMMRegister dst, AddressLiteral src) {
2924 if (reachable(src)) {
2925 Assembler::divsd(dst, as_Address(src));
2926 } else {
2927 lea(rscratch1, src);
2928 Assembler::divsd(dst, Address(rscratch1, 0));
2929 }
2930 }
2931
2932 void MacroAssembler::divss(XMMRegister dst, AddressLiteral src) {
2933 if (reachable(src)) {
2934 Assembler::divss(dst, as_Address(src));
2935 } else {
2936 lea(rscratch1, src);
2937 Assembler::divss(dst, Address(rscratch1, 0));
2938 }
2939 }
2940
2941 // !defined(COMPILER2) is because of stupid core builds
2942 #if !defined(_LP64) || defined(COMPILER1) || !defined(COMPILER2) || INCLUDE_JVMCI
2943 void MacroAssembler::empty_FPU_stack() {
2944 if (VM_Version::supports_mmx()) {
2945 emms();
2946 } else {
2947 for (int i = 8; i-- > 0; ) ffree(i);
2948 }
2949 }
2950 #endif // !LP64 || C1 || !C2 || INCLUDE_JVMCI
2951
2952
2953 // Defines obj, preserves var_size_in_bytes
2954 void MacroAssembler::eden_allocate(Register obj,
2955 Register var_size_in_bytes,
2956 int con_size_in_bytes,
2957 Register t1,
2958 Label& slow_case) {
2959 assert(obj == rax, "obj must be in rax, for cmpxchg");
2960 assert_different_registers(obj, var_size_in_bytes, t1);
2961 if (!Universe::heap()->supports_inline_contig_alloc()) {
2962 jmp(slow_case);
2963 } else {
2964 Register end = t1;
2965 Label retry;
2966 bind(retry);
2967 ExternalAddress heap_top((address) Universe::heap()->top_addr());
2968 movptr(obj, heap_top);
2969 if (var_size_in_bytes == noreg) {
2970 lea(end, Address(obj, con_size_in_bytes));
2971 } else {
2972 lea(end, Address(obj, var_size_in_bytes, Address::times_1));
2973 }
2974 // if end < obj then we wrapped around => object too long => slow case
2975 cmpptr(end, obj);
2976 jcc(Assembler::below, slow_case);
2977 cmpptr(end, ExternalAddress((address) Universe::heap()->end_addr()));
2978 jcc(Assembler::above, slow_case);
2979 // Compare obj with the top addr, and if still equal, store the new top addr in
2980 // end at the address of the top addr pointer. Sets ZF if was equal, and clears
2981 // it otherwise. Use lock prefix for atomicity on MPs.
2982 locked_cmpxchgptr(end, heap_top);
2983 jcc(Assembler::notEqual, retry);
2984 }
2985 }
2986
2987 void MacroAssembler::enter() {
2988 push(rbp);
2989 mov(rbp, rsp);
2990 }
2991
2992 // A 5 byte nop that is safe for patching (see patch_verified_entry)
2993 void MacroAssembler::fat_nop() {
2994 if (UseAddressNop) {
2995 addr_nop_5();
2996 } else {
2997 emit_int8(0x26); // es:
2998 emit_int8(0x2e); // cs:
2999 emit_int8(0x64); // fs:
3000 emit_int8(0x65); // gs:
3001 emit_int8((unsigned char)0x90);
3002 }
3003 }
3004
3005 void MacroAssembler::fcmp(Register tmp) {
3006 fcmp(tmp, 1, true, true);
3007 }
3008
3009 void MacroAssembler::fcmp(Register tmp, int index, bool pop_left, bool pop_right) {
3010 assert(!pop_right || pop_left, "usage error");
3011 if (VM_Version::supports_cmov()) {
3012 assert(tmp == noreg, "unneeded temp");
3013 if (pop_left) {
3014 fucomip(index);
3015 } else {
3016 fucomi(index);
3017 }
3018 if (pop_right) {
3019 fpop();
3020 }
3021 } else {
3022 assert(tmp != noreg, "need temp");
3023 if (pop_left) {
3024 if (pop_right) {
3025 fcompp();
3026 } else {
3027 fcomp(index);
3028 }
3029 } else {
3030 fcom(index);
3031 }
3032 // convert FPU condition into eflags condition via rax,
3033 save_rax(tmp);
3034 fwait(); fnstsw_ax();
3035 sahf();
3036 restore_rax(tmp);
3037 }
3038 // condition codes set as follows:
3039 //
3040 // CF (corresponds to C0) if x < y
3041 // PF (corresponds to C2) if unordered
3042 // ZF (corresponds to C3) if x = y
3043 }
3044
3045 void MacroAssembler::fcmp2int(Register dst, bool unordered_is_less) {
3046 fcmp2int(dst, unordered_is_less, 1, true, true);
3047 }
3048
3049 void MacroAssembler::fcmp2int(Register dst, bool unordered_is_less, int index, bool pop_left, bool pop_right) {
3050 fcmp(VM_Version::supports_cmov() ? noreg : dst, index, pop_left, pop_right);
3051 Label L;
3052 if (unordered_is_less) {
3053 movl(dst, -1);
3054 jcc(Assembler::parity, L);
3055 jcc(Assembler::below , L);
3056 movl(dst, 0);
3057 jcc(Assembler::equal , L);
3058 increment(dst);
3059 } else { // unordered is greater
3060 movl(dst, 1);
3061 jcc(Assembler::parity, L);
3062 jcc(Assembler::above , L);
3063 movl(dst, 0);
3064 jcc(Assembler::equal , L);
3065 decrementl(dst);
3066 }
3067 bind(L);
3068 }
3069
3070 void MacroAssembler::fld_d(AddressLiteral src) {
3071 fld_d(as_Address(src));
3072 }
3073
3074 void MacroAssembler::fld_s(AddressLiteral src) {
3075 fld_s(as_Address(src));
3076 }
3077
3078 void MacroAssembler::fld_x(AddressLiteral src) {
3079 Assembler::fld_x(as_Address(src));
3080 }
3081
3082 void MacroAssembler::fldcw(AddressLiteral src) {
3083 Assembler::fldcw(as_Address(src));
3084 }
3085
3086 void MacroAssembler::mulpd(XMMRegister dst, AddressLiteral src) {
3087 if (reachable(src)) {
3088 Assembler::mulpd(dst, as_Address(src));
3089 } else {
3090 lea(rscratch1, src);
3091 Assembler::mulpd(dst, Address(rscratch1, 0));
3092 }
3093 }
3094
3095 void MacroAssembler::increase_precision() {
3096 subptr(rsp, BytesPerWord);
3097 fnstcw(Address(rsp, 0));
3098 movl(rax, Address(rsp, 0));
3099 orl(rax, 0x300);
3100 push(rax);
3101 fldcw(Address(rsp, 0));
3102 pop(rax);
3103 }
3104
3105 void MacroAssembler::restore_precision() {
3106 fldcw(Address(rsp, 0));
3107 addptr(rsp, BytesPerWord);
3108 }
3109
3110 void MacroAssembler::fpop() {
3111 ffree();
3112 fincstp();
3113 }
3114
3115 void MacroAssembler::load_float(Address src) {
3116 if (UseSSE >= 1) {
3117 movflt(xmm0, src);
3118 } else {
3119 LP64_ONLY(ShouldNotReachHere());
3120 NOT_LP64(fld_s(src));
3121 }
3122 }
3123
3124 void MacroAssembler::store_float(Address dst) {
3125 if (UseSSE >= 1) {
3126 movflt(dst, xmm0);
3127 } else {
3128 LP64_ONLY(ShouldNotReachHere());
3129 NOT_LP64(fstp_s(dst));
3130 }
3131 }
3132
3133 void MacroAssembler::load_double(Address src) {
3134 if (UseSSE >= 2) {
3135 movdbl(xmm0, src);
3136 } else {
3137 LP64_ONLY(ShouldNotReachHere());
3138 NOT_LP64(fld_d(src));
3139 }
3140 }
3141
3142 void MacroAssembler::store_double(Address dst) {
3143 if (UseSSE >= 2) {
3144 movdbl(dst, xmm0);
3145 } else {
3146 LP64_ONLY(ShouldNotReachHere());
3147 NOT_LP64(fstp_d(dst));
3148 }
3149 }
3150
3151 void MacroAssembler::fremr(Register tmp) {
3152 save_rax(tmp);
3153 { Label L;
3154 bind(L);
3155 fprem();
3156 fwait(); fnstsw_ax();
3157 #ifdef _LP64
3158 testl(rax, 0x400);
3159 jcc(Assembler::notEqual, L);
3160 #else
3161 sahf();
3162 jcc(Assembler::parity, L);
3163 #endif // _LP64
3164 }
3165 restore_rax(tmp);
3166 // Result is in ST0.
3167 // Note: fxch & fpop to get rid of ST1
3168 // (otherwise FPU stack could overflow eventually)
3169 fxch(1);
3170 fpop();
3171 }
3172
3173 // dst = c = a * b + c
3174 void MacroAssembler::fmad(XMMRegister dst, XMMRegister a, XMMRegister b, XMMRegister c) {
3175 Assembler::vfmadd231sd(c, a, b);
3176 if (dst != c) {
3177 movdbl(dst, c);
3178 }
3179 }
3180
3181 // dst = c = a * b + c
3182 void MacroAssembler::fmaf(XMMRegister dst, XMMRegister a, XMMRegister b, XMMRegister c) {
3183 Assembler::vfmadd231ss(c, a, b);
3184 if (dst != c) {
3185 movflt(dst, c);
3186 }
3187 }
3188
3189 // dst = c = a * b + c
3190 void MacroAssembler::vfmad(XMMRegister dst, XMMRegister a, XMMRegister b, XMMRegister c, int vector_len) {
3191 Assembler::vfmadd231pd(c, a, b, vector_len);
3192 if (dst != c) {
3193 vmovdqu(dst, c);
3194 }
3195 }
3196
3197 // dst = c = a * b + c
3198 void MacroAssembler::vfmaf(XMMRegister dst, XMMRegister a, XMMRegister b, XMMRegister c, int vector_len) {
3199 Assembler::vfmadd231ps(c, a, b, vector_len);
3200 if (dst != c) {
3201 vmovdqu(dst, c);
3202 }
3203 }
3204
3205 // dst = c = a * b + c
3206 void MacroAssembler::vfmad(XMMRegister dst, XMMRegister a, Address b, XMMRegister c, int vector_len) {
3207 Assembler::vfmadd231pd(c, a, b, vector_len);
3208 if (dst != c) {
3209 vmovdqu(dst, c);
3210 }
3211 }
3212
3213 // dst = c = a * b + c
3214 void MacroAssembler::vfmaf(XMMRegister dst, XMMRegister a, Address b, XMMRegister c, int vector_len) {
3215 Assembler::vfmadd231ps(c, a, b, vector_len);
3216 if (dst != c) {
3217 vmovdqu(dst, c);
3218 }
3219 }
3220
3221 void MacroAssembler::incrementl(AddressLiteral dst) {
3222 if (reachable(dst)) {
3223 incrementl(as_Address(dst));
3224 } else {
3225 lea(rscratch1, dst);
3226 incrementl(Address(rscratch1, 0));
3227 }
3228 }
3229
3230 void MacroAssembler::incrementl(ArrayAddress dst) {
3231 incrementl(as_Address(dst));
3232 }
3233
3234 void MacroAssembler::incrementl(Register reg, int value) {
3235 if (value == min_jint) {addl(reg, value) ; return; }
3236 if (value < 0) { decrementl(reg, -value); return; }
3237 if (value == 0) { ; return; }
3238 if (value == 1 && UseIncDec) { incl(reg) ; return; }
3239 /* else */ { addl(reg, value) ; return; }
3240 }
3241
3242 void MacroAssembler::incrementl(Address dst, int value) {
3243 if (value == min_jint) {addl(dst, value) ; return; }
3244 if (value < 0) { decrementl(dst, -value); return; }
3245 if (value == 0) { ; return; }
3246 if (value == 1 && UseIncDec) { incl(dst) ; return; }
3247 /* else */ { addl(dst, value) ; return; }
3248 }
3249
3250 void MacroAssembler::jump(AddressLiteral dst) {
3251 if (reachable(dst)) {
3252 jmp_literal(dst.target(), dst.rspec());
3253 } else {
3254 lea(rscratch1, dst);
3255 jmp(rscratch1);
3256 }
3257 }
3258
3259 void MacroAssembler::jump_cc(Condition cc, AddressLiteral dst) {
3260 if (reachable(dst)) {
3261 InstructionMark im(this);
3262 relocate(dst.reloc());
3263 const int short_size = 2;
3264 const int long_size = 6;
3265 int offs = (intptr_t)dst.target() - ((intptr_t)pc());
3266 if (dst.reloc() == relocInfo::none && is8bit(offs - short_size)) {
3267 // 0111 tttn #8-bit disp
3268 emit_int8(0x70 | cc);
3269 emit_int8((offs - short_size) & 0xFF);
3270 } else {
3271 // 0000 1111 1000 tttn #32-bit disp
3272 emit_int8(0x0F);
3273 emit_int8((unsigned char)(0x80 | cc));
3274 emit_int32(offs - long_size);
3275 }
3276 } else {
3277 #ifdef ASSERT
3278 warning("reversing conditional branch");
3279 #endif /* ASSERT */
3280 Label skip;
3281 jccb(reverse[cc], skip);
3282 lea(rscratch1, dst);
3283 Assembler::jmp(rscratch1);
3284 bind(skip);
3285 }
3286 }
3287
3288 void MacroAssembler::ldmxcsr(AddressLiteral src) {
3289 if (reachable(src)) {
3290 Assembler::ldmxcsr(as_Address(src));
3291 } else {
3292 lea(rscratch1, src);
3293 Assembler::ldmxcsr(Address(rscratch1, 0));
3294 }
3295 }
3296
3297 int MacroAssembler::load_signed_byte(Register dst, Address src) {
3298 int off;
3299 if (LP64_ONLY(true ||) VM_Version::is_P6()) {
3300 off = offset();
3301 movsbl(dst, src); // movsxb
3302 } else {
3303 off = load_unsigned_byte(dst, src);
3304 shll(dst, 24);
3305 sarl(dst, 24);
3306 }
3307 return off;
3308 }
3309
3310 // Note: load_signed_short used to be called load_signed_word.
3311 // Although the 'w' in x86 opcodes refers to the term "word" in the assembler
3312 // manual, which means 16 bits, that usage is found nowhere in HotSpot code.
3313 // The term "word" in HotSpot means a 32- or 64-bit machine word.
3314 int MacroAssembler::load_signed_short(Register dst, Address src) {
3315 int off;
3316 if (LP64_ONLY(true ||) VM_Version::is_P6()) {
3317 // This is dubious to me since it seems safe to do a signed 16 => 64 bit
3318 // version but this is what 64bit has always done. This seems to imply
3319 // that users are only using 32bits worth.
3320 off = offset();
3321 movswl(dst, src); // movsxw
3322 } else {
3323 off = load_unsigned_short(dst, src);
3324 shll(dst, 16);
3325 sarl(dst, 16);
3326 }
3327 return off;
3328 }
3329
3330 int MacroAssembler::load_unsigned_byte(Register dst, Address src) {
3331 // According to Intel Doc. AP-526, "Zero-Extension of Short", p.16,
3332 // and "3.9 Partial Register Penalties", p. 22).
3333 int off;
3334 if (LP64_ONLY(true || ) VM_Version::is_P6() || src.uses(dst)) {
3335 off = offset();
3336 movzbl(dst, src); // movzxb
3337 } else {
3338 xorl(dst, dst);
3339 off = offset();
3340 movb(dst, src);
3341 }
3342 return off;
3343 }
3344
3345 // Note: load_unsigned_short used to be called load_unsigned_word.
3346 int MacroAssembler::load_unsigned_short(Register dst, Address src) {
3347 // According to Intel Doc. AP-526, "Zero-Extension of Short", p.16,
3348 // and "3.9 Partial Register Penalties", p. 22).
3349 int off;
3350 if (LP64_ONLY(true ||) VM_Version::is_P6() || src.uses(dst)) {
3351 off = offset();
3352 movzwl(dst, src); // movzxw
3353 } else {
3354 xorl(dst, dst);
3355 off = offset();
3356 movw(dst, src);
3357 }
3358 return off;
3359 }
3360
3361 void MacroAssembler::load_sized_value(Register dst, Address src, size_t size_in_bytes, bool is_signed, Register dst2) {
3362 switch (size_in_bytes) {
3363 #ifndef _LP64
3364 case 8:
3365 assert(dst2 != noreg, "second dest register required");
3366 movl(dst, src);
3367 movl(dst2, src.plus_disp(BytesPerInt));
3368 break;
3369 #else
3370 case 8: movq(dst, src); break;
3371 #endif
3372 case 4: movl(dst, src); break;
3373 case 2: is_signed ? load_signed_short(dst, src) : load_unsigned_short(dst, src); break;
3374 case 1: is_signed ? load_signed_byte( dst, src) : load_unsigned_byte( dst, src); break;
3375 default: ShouldNotReachHere();
3376 }
3377 }
3378
3379 void MacroAssembler::store_sized_value(Address dst, Register src, size_t size_in_bytes, Register src2) {
3380 switch (size_in_bytes) {
3381 #ifndef _LP64
3382 case 8:
3383 assert(src2 != noreg, "second source register required");
3384 movl(dst, src);
3385 movl(dst.plus_disp(BytesPerInt), src2);
3386 break;
3387 #else
3388 case 8: movq(dst, src); break;
3389 #endif
3390 case 4: movl(dst, src); break;
3391 case 2: movw(dst, src); break;
3392 case 1: movb(dst, src); break;
3393 default: ShouldNotReachHere();
3394 }
3395 }
3396
3397 void MacroAssembler::mov32(AddressLiteral dst, Register src) {
3398 if (reachable(dst)) {
3399 movl(as_Address(dst), src);
3400 } else {
3401 lea(rscratch1, dst);
3402 movl(Address(rscratch1, 0), src);
3403 }
3404 }
3405
3406 void MacroAssembler::mov32(Register dst, AddressLiteral src) {
3407 if (reachable(src)) {
3408 movl(dst, as_Address(src));
3409 } else {
3410 lea(rscratch1, src);
3411 movl(dst, Address(rscratch1, 0));
3412 }
3413 }
3414
3415 // C++ bool manipulation
3416
3417 void MacroAssembler::movbool(Register dst, Address src) {
3418 if(sizeof(bool) == 1)
3419 movb(dst, src);
3420 else if(sizeof(bool) == 2)
3421 movw(dst, src);
3422 else if(sizeof(bool) == 4)
3423 movl(dst, src);
3424 else
3425 // unsupported
3426 ShouldNotReachHere();
3427 }
3428
3429 void MacroAssembler::movbool(Address dst, bool boolconst) {
3430 if(sizeof(bool) == 1)
3431 movb(dst, (int) boolconst);
3432 else if(sizeof(bool) == 2)
3433 movw(dst, (int) boolconst);
3434 else if(sizeof(bool) == 4)
3435 movl(dst, (int) boolconst);
3436 else
3437 // unsupported
3438 ShouldNotReachHere();
3439 }
3440
3441 void MacroAssembler::movbool(Address dst, Register src) {
3442 if(sizeof(bool) == 1)
3443 movb(dst, src);
3444 else if(sizeof(bool) == 2)
3445 movw(dst, src);
3446 else if(sizeof(bool) == 4)
3447 movl(dst, src);
3448 else
3449 // unsupported
3450 ShouldNotReachHere();
3451 }
3452
3453 void MacroAssembler::movbyte(ArrayAddress dst, int src) {
3454 movb(as_Address(dst), src);
3455 }
3456
3457 void MacroAssembler::movdl(XMMRegister dst, AddressLiteral src) {
3458 if (reachable(src)) {
3459 movdl(dst, as_Address(src));
3460 } else {
3461 lea(rscratch1, src);
3462 movdl(dst, Address(rscratch1, 0));
3463 }
3464 }
3465
3466 void MacroAssembler::movq(XMMRegister dst, AddressLiteral src) {
3467 if (reachable(src)) {
3468 movq(dst, as_Address(src));
3469 } else {
3470 lea(rscratch1, src);
3471 movq(dst, Address(rscratch1, 0));
3472 }
3473 }
3474
3475 void MacroAssembler::setvectmask(Register dst, Register src) {
3476 Assembler::movl(dst, 1);
3477 Assembler::shlxl(dst, dst, src);
3478 Assembler::decl(dst);
3479 Assembler::kmovdl(k1, dst);
3480 Assembler::movl(dst, src);
3481 }
3482
3483 void MacroAssembler::restorevectmask() {
3484 Assembler::knotwl(k1, k0);
3485 }
3486
3487 void MacroAssembler::movdbl(XMMRegister dst, AddressLiteral src) {
3488 if (reachable(src)) {
3489 if (UseXmmLoadAndClearUpper) {
3490 movsd (dst, as_Address(src));
3491 } else {
3492 movlpd(dst, as_Address(src));
3493 }
3494 } else {
3495 lea(rscratch1, src);
3496 if (UseXmmLoadAndClearUpper) {
3497 movsd (dst, Address(rscratch1, 0));
3498 } else {
3499 movlpd(dst, Address(rscratch1, 0));
3500 }
3501 }
3502 }
3503
3504 void MacroAssembler::movflt(XMMRegister dst, AddressLiteral src) {
3505 if (reachable(src)) {
3506 movss(dst, as_Address(src));
3507 } else {
3508 lea(rscratch1, src);
3509 movss(dst, Address(rscratch1, 0));
3510 }
3511 }
3512
3513 void MacroAssembler::movptr(Register dst, Register src) {
3514 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src));
3515 }
3516
3517 void MacroAssembler::movptr(Register dst, Address src) {
3518 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src));
3519 }
3520
3521 // src should NEVER be a real pointer. Use AddressLiteral for true pointers
3522 void MacroAssembler::movptr(Register dst, intptr_t src) {
3523 LP64_ONLY(mov64(dst, src)) NOT_LP64(movl(dst, src));
3524 }
3525
3526 void MacroAssembler::movptr(Address dst, Register src) {
3527 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src));
3528 }
3529
3530 void MacroAssembler::movdqu(Address dst, XMMRegister src) {
3531 if (UseAVX > 2 && !VM_Version::supports_avx512vl() && (src->encoding() > 15)) {
3532 Assembler::vextractf32x4(dst, src, 0);
3533 } else {
3534 Assembler::movdqu(dst, src);
3535 }
3536 }
3537
3538 void MacroAssembler::movdqu(XMMRegister dst, Address src) {
3539 if (UseAVX > 2 && !VM_Version::supports_avx512vl() && (dst->encoding() > 15)) {
3540 Assembler::vinsertf32x4(dst, dst, src, 0);
3541 } else {
3542 Assembler::movdqu(dst, src);
3543 }
3544 }
3545
3546 void MacroAssembler::movdqu(XMMRegister dst, XMMRegister src) {
3547 if (UseAVX > 2 && !VM_Version::supports_avx512vl()) {
3548 Assembler::evmovdqul(dst, src, Assembler::AVX_512bit);
3549 } else {
3550 Assembler::movdqu(dst, src);
3551 }
3552 }
3553
3554 void MacroAssembler::movdqu(XMMRegister dst, AddressLiteral src, Register scratchReg) {
3555 if (reachable(src)) {
3556 movdqu(dst, as_Address(src));
3557 } else {
3558 lea(scratchReg, src);
3559 movdqu(dst, Address(scratchReg, 0));
3560 }
3561 }
3562
3563 void MacroAssembler::vmovdqu(Address dst, XMMRegister src) {
3564 if (UseAVX > 2 && !VM_Version::supports_avx512vl() && (src->encoding() > 15)) {
3565 vextractf64x4_low(dst, src);
3566 } else {
3567 Assembler::vmovdqu(dst, src);
3568 }
3569 }
3570
3571 void MacroAssembler::vmovdqu(XMMRegister dst, Address src) {
3572 if (UseAVX > 2 && !VM_Version::supports_avx512vl() && (dst->encoding() > 15)) {
3573 vinsertf64x4_low(dst, src);
3574 } else {
3575 Assembler::vmovdqu(dst, src);
3576 }
3577 }
3578
3579 void MacroAssembler::vmovdqu(XMMRegister dst, XMMRegister src) {
3580 if (UseAVX > 2 && !VM_Version::supports_avx512vl()) {
3581 Assembler::evmovdqul(dst, src, Assembler::AVX_512bit);
3582 }
3583 else {
3584 Assembler::vmovdqu(dst, src);
3585 }
3586 }
3587
3588 void MacroAssembler::vmovdqu(XMMRegister dst, AddressLiteral src) {
3589 if (reachable(src)) {
3590 vmovdqu(dst, as_Address(src));
3591 }
3592 else {
3593 lea(rscratch1, src);
3594 vmovdqu(dst, Address(rscratch1, 0));
3595 }
3596 }
3597
3598 void MacroAssembler::movdqa(XMMRegister dst, AddressLiteral src) {
3599 if (reachable(src)) {
3600 Assembler::movdqa(dst, as_Address(src));
3601 } else {
3602 lea(rscratch1, src);
3603 Assembler::movdqa(dst, Address(rscratch1, 0));
3604 }
3605 }
3606
3607 void MacroAssembler::movsd(XMMRegister dst, AddressLiteral src) {
3608 if (reachable(src)) {
3609 Assembler::movsd(dst, as_Address(src));
3610 } else {
3611 lea(rscratch1, src);
3612 Assembler::movsd(dst, Address(rscratch1, 0));
3613 }
3614 }
3615
3616 void MacroAssembler::movss(XMMRegister dst, AddressLiteral src) {
3617 if (reachable(src)) {
3618 Assembler::movss(dst, as_Address(src));
3619 } else {
3620 lea(rscratch1, src);
3621 Assembler::movss(dst, Address(rscratch1, 0));
3622 }
3623 }
3624
3625 void MacroAssembler::mulsd(XMMRegister dst, AddressLiteral src) {
3626 if (reachable(src)) {
3627 Assembler::mulsd(dst, as_Address(src));
3628 } else {
3629 lea(rscratch1, src);
3630 Assembler::mulsd(dst, Address(rscratch1, 0));
3631 }
3632 }
3633
3634 void MacroAssembler::mulss(XMMRegister dst, AddressLiteral src) {
3635 if (reachable(src)) {
3636 Assembler::mulss(dst, as_Address(src));
3637 } else {
3638 lea(rscratch1, src);
3639 Assembler::mulss(dst, Address(rscratch1, 0));
3640 }
3641 }
3642
3643 void MacroAssembler::null_check(Register reg, int offset) {
3644 if (needs_explicit_null_check(offset)) {
3645 // provoke OS NULL exception if reg = NULL by
3646 // accessing M[reg] w/o changing any (non-CC) registers
3647 // NOTE: cmpl is plenty here to provoke a segv
3648 cmpptr(rax, Address(reg, 0));
3649 // Note: should probably use testl(rax, Address(reg, 0));
3650 // may be shorter code (however, this version of
3651 // testl needs to be implemented first)
3652 } else {
3653 // nothing to do, (later) access of M[reg + offset]
3654 // will provoke OS NULL exception if reg = NULL
3655 }
3656 }
3657
3658 void MacroAssembler::os_breakpoint() {
3659 // instead of directly emitting a breakpoint, call os:breakpoint for better debugability
3660 // (e.g., MSVC can't call ps() otherwise)
3661 call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint)));
3662 }
3663
3664 void MacroAssembler::unimplemented(const char* what) {
3665 const char* buf = NULL;
3666 {
3667 ResourceMark rm;
3668 stringStream ss;
3669 ss.print("unimplemented: %s", what);
3670 buf = code_string(ss.as_string());
3671 }
3672 stop(buf);
3673 }
3674
3675 #ifdef _LP64
3676 #define XSTATE_BV 0x200
3677 #endif
3678
3679 void MacroAssembler::pop_CPU_state() {
3680 pop_FPU_state();
3681 pop_IU_state();
3682 }
3683
3684 void MacroAssembler::pop_FPU_state() {
3685 #ifndef _LP64
3686 frstor(Address(rsp, 0));
3687 #else
3688 fxrstor(Address(rsp, 0));
3689 #endif
3690 addptr(rsp, FPUStateSizeInWords * wordSize);
3691 }
3692
3693 void MacroAssembler::pop_IU_state() {
3694 popa();
3695 LP64_ONLY(addq(rsp, 8));
3696 popf();
3697 }
3698
3699 // Save Integer and Float state
3700 // Warning: Stack must be 16 byte aligned (64bit)
3701 void MacroAssembler::push_CPU_state() {
3702 push_IU_state();
3703 push_FPU_state();
3704 }
3705
3706 void MacroAssembler::push_FPU_state() {
3707 subptr(rsp, FPUStateSizeInWords * wordSize);
3708 #ifndef _LP64
3709 fnsave(Address(rsp, 0));
3710 fwait();
3711 #else
3712 fxsave(Address(rsp, 0));
3713 #endif // LP64
3714 }
3715
3716 void MacroAssembler::push_IU_state() {
3717 // Push flags first because pusha kills them
3718 pushf();
3719 // Make sure rsp stays 16-byte aligned
3720 LP64_ONLY(subq(rsp, 8));
3721 pusha();
3722 }
3723
3724 void MacroAssembler::reset_last_Java_frame(Register java_thread, bool clear_fp) { // determine java_thread register
3725 if (!java_thread->is_valid()) {
3726 java_thread = rdi;
3727 get_thread(java_thread);
3728 }
3729 // we must set sp to zero to clear frame
3730 movptr(Address(java_thread, JavaThread::last_Java_sp_offset()), NULL_WORD);
3731 if (clear_fp) {
3732 movptr(Address(java_thread, JavaThread::last_Java_fp_offset()), NULL_WORD);
3733 }
3734
3735 // Always clear the pc because it could have been set by make_walkable()
3736 movptr(Address(java_thread, JavaThread::last_Java_pc_offset()), NULL_WORD);
3737
3738 vzeroupper();
3739 }
3740
3741 void MacroAssembler::restore_rax(Register tmp) {
3742 if (tmp == noreg) pop(rax);
3743 else if (tmp != rax) mov(rax, tmp);
3744 }
3745
3746 void MacroAssembler::round_to(Register reg, int modulus) {
3747 addptr(reg, modulus - 1);
3748 andptr(reg, -modulus);
3749 }
3750
3751 void MacroAssembler::save_rax(Register tmp) {
3752 if (tmp == noreg) push(rax);
3753 else if (tmp != rax) mov(tmp, rax);
3754 }
3755
3756 // Write serialization page so VM thread can do a pseudo remote membar.
3757 // We use the current thread pointer to calculate a thread specific
3758 // offset to write to within the page. This minimizes bus traffic
3759 // due to cache line collision.
3760 void MacroAssembler::serialize_memory(Register thread, Register tmp) {
3761 movl(tmp, thread);
3762 shrl(tmp, os::get_serialize_page_shift_count());
3763 andl(tmp, (os::vm_page_size() - sizeof(int)));
3764
3765 Address index(noreg, tmp, Address::times_1);
3766 ExternalAddress page(os::get_memory_serialize_page());
3767
3768 // Size of store must match masking code above
3769 movl(as_Address(ArrayAddress(page, index)), tmp);
3770 }
3771
3772 void MacroAssembler::safepoint_poll(Label& slow_path, Register thread_reg, Register temp_reg) {
3773 if (SafepointMechanism::uses_thread_local_poll()) {
3774 #ifdef _LP64
3775 assert(thread_reg == r15_thread, "should be");
3776 #else
3777 if (thread_reg == noreg) {
3778 thread_reg = temp_reg;
3779 get_thread(thread_reg);
3780 }
3781 #endif
3782 testb(Address(thread_reg, Thread::polling_page_offset()), SafepointMechanism::poll_bit());
3783 jcc(Assembler::notZero, slow_path); // handshake bit set implies poll
3784 } else {
3785 cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
3786 SafepointSynchronize::_not_synchronized);
3787 jcc(Assembler::notEqual, slow_path);
3788 }
3789 }
3790
3791 // Calls to C land
3792 //
3793 // When entering C land, the rbp, & rsp of the last Java frame have to be recorded
3794 // in the (thread-local) JavaThread object. When leaving C land, the last Java fp
3795 // has to be reset to 0. This is required to allow proper stack traversal.
3796 void MacroAssembler::set_last_Java_frame(Register java_thread,
3797 Register last_java_sp,
3798 Register last_java_fp,
3799 address last_java_pc) {
3800 vzeroupper();
3801 // determine java_thread register
3802 if (!java_thread->is_valid()) {
3803 java_thread = rdi;
3804 get_thread(java_thread);
3805 }
3806 // determine last_java_sp register
3807 if (!last_java_sp->is_valid()) {
3808 last_java_sp = rsp;
3809 }
3810
3811 // last_java_fp is optional
3812
3813 if (last_java_fp->is_valid()) {
3814 movptr(Address(java_thread, JavaThread::last_Java_fp_offset()), last_java_fp);
3815 }
3816
3817 // last_java_pc is optional
3818
3819 if (last_java_pc != NULL) {
3820 lea(Address(java_thread,
3821 JavaThread::frame_anchor_offset() + JavaFrameAnchor::last_Java_pc_offset()),
3822 InternalAddress(last_java_pc));
3823
3824 }
3825 movptr(Address(java_thread, JavaThread::last_Java_sp_offset()), last_java_sp);
3826 }
3827
3828 void MacroAssembler::shlptr(Register dst, int imm8) {
3829 LP64_ONLY(shlq(dst, imm8)) NOT_LP64(shll(dst, imm8));
3830 }
3831
3832 void MacroAssembler::shrptr(Register dst, int imm8) {
3833 LP64_ONLY(shrq(dst, imm8)) NOT_LP64(shrl(dst, imm8));
3834 }
3835
3836 void MacroAssembler::sign_extend_byte(Register reg) {
3837 if (LP64_ONLY(true ||) (VM_Version::is_P6() && reg->has_byte_register())) {
3838 movsbl(reg, reg); // movsxb
3839 } else {
3840 shll(reg, 24);
3841 sarl(reg, 24);
3842 }
3843 }
3844
3845 void MacroAssembler::sign_extend_short(Register reg) {
3846 if (LP64_ONLY(true ||) VM_Version::is_P6()) {
3847 movswl(reg, reg); // movsxw
3848 } else {
3849 shll(reg, 16);
3850 sarl(reg, 16);
3851 }
3852 }
3853
3854 void MacroAssembler::testl(Register dst, AddressLiteral src) {
3855 assert(reachable(src), "Address should be reachable");
3856 testl(dst, as_Address(src));
3857 }
3858
3859 void MacroAssembler::pcmpeqb(XMMRegister dst, XMMRegister src) {
3860 int dst_enc = dst->encoding();
3861 int src_enc = src->encoding();
3862 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
3863 Assembler::pcmpeqb(dst, src);
3864 } else if ((dst_enc < 16) && (src_enc < 16)) {
3865 Assembler::pcmpeqb(dst, src);
3866 } else if (src_enc < 16) {
3867 subptr(rsp, 64);
3868 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
3869 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
3870 Assembler::pcmpeqb(xmm0, src);
3871 movdqu(dst, xmm0);
3872 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
3873 addptr(rsp, 64);
3874 } else if (dst_enc < 16) {
3875 subptr(rsp, 64);
3876 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
3877 evmovdqul(xmm0, src, Assembler::AVX_512bit);
3878 Assembler::pcmpeqb(dst, xmm0);
3879 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
3880 addptr(rsp, 64);
3881 } else {
3882 subptr(rsp, 64);
3883 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
3884 subptr(rsp, 64);
3885 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
3886 movdqu(xmm0, src);
3887 movdqu(xmm1, dst);
3888 Assembler::pcmpeqb(xmm1, xmm0);
3889 movdqu(dst, xmm1);
3890 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
3891 addptr(rsp, 64);
3892 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
3893 addptr(rsp, 64);
3894 }
3895 }
3896
3897 void MacroAssembler::pcmpeqw(XMMRegister dst, XMMRegister src) {
3898 int dst_enc = dst->encoding();
3899 int src_enc = src->encoding();
3900 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
3901 Assembler::pcmpeqw(dst, src);
3902 } else if ((dst_enc < 16) && (src_enc < 16)) {
3903 Assembler::pcmpeqw(dst, src);
3904 } else if (src_enc < 16) {
3905 subptr(rsp, 64);
3906 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
3907 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
3908 Assembler::pcmpeqw(xmm0, src);
3909 movdqu(dst, xmm0);
3910 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
3911 addptr(rsp, 64);
3912 } else if (dst_enc < 16) {
3913 subptr(rsp, 64);
3914 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
3915 evmovdqul(xmm0, src, Assembler::AVX_512bit);
3916 Assembler::pcmpeqw(dst, xmm0);
3917 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
3918 addptr(rsp, 64);
3919 } else {
3920 subptr(rsp, 64);
3921 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
3922 subptr(rsp, 64);
3923 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
3924 movdqu(xmm0, src);
3925 movdqu(xmm1, dst);
3926 Assembler::pcmpeqw(xmm1, xmm0);
3927 movdqu(dst, xmm1);
3928 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
3929 addptr(rsp, 64);
3930 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
3931 addptr(rsp, 64);
3932 }
3933 }
3934
3935 void MacroAssembler::pcmpestri(XMMRegister dst, Address src, int imm8) {
3936 int dst_enc = dst->encoding();
3937 if (dst_enc < 16) {
3938 Assembler::pcmpestri(dst, src, imm8);
3939 } else {
3940 subptr(rsp, 64);
3941 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
3942 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
3943 Assembler::pcmpestri(xmm0, src, imm8);
3944 movdqu(dst, xmm0);
3945 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
3946 addptr(rsp, 64);
3947 }
3948 }
3949
3950 void MacroAssembler::pcmpestri(XMMRegister dst, XMMRegister src, int imm8) {
3951 int dst_enc = dst->encoding();
3952 int src_enc = src->encoding();
3953 if ((dst_enc < 16) && (src_enc < 16)) {
3954 Assembler::pcmpestri(dst, src, imm8);
3955 } else if (src_enc < 16) {
3956 subptr(rsp, 64);
3957 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
3958 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
3959 Assembler::pcmpestri(xmm0, src, imm8);
3960 movdqu(dst, xmm0);
3961 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
3962 addptr(rsp, 64);
3963 } else if (dst_enc < 16) {
3964 subptr(rsp, 64);
3965 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
3966 evmovdqul(xmm0, src, Assembler::AVX_512bit);
3967 Assembler::pcmpestri(dst, xmm0, imm8);
3968 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
3969 addptr(rsp, 64);
3970 } else {
3971 subptr(rsp, 64);
3972 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
3973 subptr(rsp, 64);
3974 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
3975 movdqu(xmm0, src);
3976 movdqu(xmm1, dst);
3977 Assembler::pcmpestri(xmm1, xmm0, imm8);
3978 movdqu(dst, xmm1);
3979 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
3980 addptr(rsp, 64);
3981 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
3982 addptr(rsp, 64);
3983 }
3984 }
3985
3986 void MacroAssembler::pmovzxbw(XMMRegister dst, XMMRegister src) {
3987 int dst_enc = dst->encoding();
3988 int src_enc = src->encoding();
3989 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
3990 Assembler::pmovzxbw(dst, src);
3991 } else if ((dst_enc < 16) && (src_enc < 16)) {
3992 Assembler::pmovzxbw(dst, src);
3993 } else if (src_enc < 16) {
3994 subptr(rsp, 64);
3995 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
3996 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
3997 Assembler::pmovzxbw(xmm0, src);
3998 movdqu(dst, xmm0);
3999 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4000 addptr(rsp, 64);
4001 } else if (dst_enc < 16) {
4002 subptr(rsp, 64);
4003 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4004 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4005 Assembler::pmovzxbw(dst, xmm0);
4006 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4007 addptr(rsp, 64);
4008 } else {
4009 subptr(rsp, 64);
4010 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4011 subptr(rsp, 64);
4012 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4013 movdqu(xmm0, src);
4014 movdqu(xmm1, dst);
4015 Assembler::pmovzxbw(xmm1, xmm0);
4016 movdqu(dst, xmm1);
4017 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4018 addptr(rsp, 64);
4019 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4020 addptr(rsp, 64);
4021 }
4022 }
4023
4024 void MacroAssembler::pmovzxbw(XMMRegister dst, Address src) {
4025 int dst_enc = dst->encoding();
4026 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4027 Assembler::pmovzxbw(dst, src);
4028 } else if (dst_enc < 16) {
4029 Assembler::pmovzxbw(dst, src);
4030 } else {
4031 subptr(rsp, 64);
4032 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4033 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4034 Assembler::pmovzxbw(xmm0, src);
4035 movdqu(dst, xmm0);
4036 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4037 addptr(rsp, 64);
4038 }
4039 }
4040
4041 void MacroAssembler::pmovmskb(Register dst, XMMRegister src) {
4042 int src_enc = src->encoding();
4043 if (src_enc < 16) {
4044 Assembler::pmovmskb(dst, src);
4045 } else {
4046 subptr(rsp, 64);
4047 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4048 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4049 Assembler::pmovmskb(dst, xmm0);
4050 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4051 addptr(rsp, 64);
4052 }
4053 }
4054
4055 void MacroAssembler::ptest(XMMRegister dst, XMMRegister src) {
4056 int dst_enc = dst->encoding();
4057 int src_enc = src->encoding();
4058 if ((dst_enc < 16) && (src_enc < 16)) {
4059 Assembler::ptest(dst, src);
4060 } else if (src_enc < 16) {
4061 subptr(rsp, 64);
4062 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4063 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4064 Assembler::ptest(xmm0, src);
4065 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4066 addptr(rsp, 64);
4067 } else if (dst_enc < 16) {
4068 subptr(rsp, 64);
4069 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4070 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4071 Assembler::ptest(dst, xmm0);
4072 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4073 addptr(rsp, 64);
4074 } else {
4075 subptr(rsp, 64);
4076 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4077 subptr(rsp, 64);
4078 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4079 movdqu(xmm0, src);
4080 movdqu(xmm1, dst);
4081 Assembler::ptest(xmm1, xmm0);
4082 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4083 addptr(rsp, 64);
4084 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4085 addptr(rsp, 64);
4086 }
4087 }
4088
4089 void MacroAssembler::sqrtsd(XMMRegister dst, AddressLiteral src) {
4090 if (reachable(src)) {
4091 Assembler::sqrtsd(dst, as_Address(src));
4092 } else {
4093 lea(rscratch1, src);
4094 Assembler::sqrtsd(dst, Address(rscratch1, 0));
4095 }
4096 }
4097
4098 void MacroAssembler::sqrtss(XMMRegister dst, AddressLiteral src) {
4099 if (reachable(src)) {
4100 Assembler::sqrtss(dst, as_Address(src));
4101 } else {
4102 lea(rscratch1, src);
4103 Assembler::sqrtss(dst, Address(rscratch1, 0));
4104 }
4105 }
4106
4107 void MacroAssembler::subsd(XMMRegister dst, AddressLiteral src) {
4108 if (reachable(src)) {
4109 Assembler::subsd(dst, as_Address(src));
4110 } else {
4111 lea(rscratch1, src);
4112 Assembler::subsd(dst, Address(rscratch1, 0));
4113 }
4114 }
4115
4116 void MacroAssembler::subss(XMMRegister dst, AddressLiteral src) {
4117 if (reachable(src)) {
4118 Assembler::subss(dst, as_Address(src));
4119 } else {
4120 lea(rscratch1, src);
4121 Assembler::subss(dst, Address(rscratch1, 0));
4122 }
4123 }
4124
4125 void MacroAssembler::ucomisd(XMMRegister dst, AddressLiteral src) {
4126 if (reachable(src)) {
4127 Assembler::ucomisd(dst, as_Address(src));
4128 } else {
4129 lea(rscratch1, src);
4130 Assembler::ucomisd(dst, Address(rscratch1, 0));
4131 }
4132 }
4133
4134 void MacroAssembler::ucomiss(XMMRegister dst, AddressLiteral src) {
4135 if (reachable(src)) {
4136 Assembler::ucomiss(dst, as_Address(src));
4137 } else {
4138 lea(rscratch1, src);
4139 Assembler::ucomiss(dst, Address(rscratch1, 0));
4140 }
4141 }
4142
4143 void MacroAssembler::xorpd(XMMRegister dst, AddressLiteral src) {
4144 // Used in sign-bit flipping with aligned address.
4145 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes");
4146 if (reachable(src)) {
4147 Assembler::xorpd(dst, as_Address(src));
4148 } else {
4149 lea(rscratch1, src);
4150 Assembler::xorpd(dst, Address(rscratch1, 0));
4151 }
4152 }
4153
4154 void MacroAssembler::xorpd(XMMRegister dst, XMMRegister src) {
4155 if (UseAVX > 2 && !VM_Version::supports_avx512dq() && (dst->encoding() == src->encoding())) {
4156 Assembler::vpxor(dst, dst, src, Assembler::AVX_512bit);
4157 }
4158 else {
4159 Assembler::xorpd(dst, src);
4160 }
4161 }
4162
4163 void MacroAssembler::xorps(XMMRegister dst, XMMRegister src) {
4164 if (UseAVX > 2 && !VM_Version::supports_avx512dq() && (dst->encoding() == src->encoding())) {
4165 Assembler::vpxor(dst, dst, src, Assembler::AVX_512bit);
4166 } else {
4167 Assembler::xorps(dst, src);
4168 }
4169 }
4170
4171 void MacroAssembler::xorps(XMMRegister dst, AddressLiteral src) {
4172 // Used in sign-bit flipping with aligned address.
4173 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes");
4174 if (reachable(src)) {
4175 Assembler::xorps(dst, as_Address(src));
4176 } else {
4177 lea(rscratch1, src);
4178 Assembler::xorps(dst, Address(rscratch1, 0));
4179 }
4180 }
4181
4182 void MacroAssembler::pshufb(XMMRegister dst, AddressLiteral src) {
4183 // Used in sign-bit flipping with aligned address.
4184 bool aligned_adr = (((intptr_t)src.target() & 15) == 0);
4185 assert((UseAVX > 0) || aligned_adr, "SSE mode requires address alignment 16 bytes");
4186 if (reachable(src)) {
4187 Assembler::pshufb(dst, as_Address(src));
4188 } else {
4189 lea(rscratch1, src);
4190 Assembler::pshufb(dst, Address(rscratch1, 0));
4191 }
4192 }
4193
4194 // AVX 3-operands instructions
4195
4196 void MacroAssembler::vaddsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
4197 if (reachable(src)) {
4198 vaddsd(dst, nds, as_Address(src));
4199 } else {
4200 lea(rscratch1, src);
4201 vaddsd(dst, nds, Address(rscratch1, 0));
4202 }
4203 }
4204
4205 void MacroAssembler::vaddss(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
4206 if (reachable(src)) {
4207 vaddss(dst, nds, as_Address(src));
4208 } else {
4209 lea(rscratch1, src);
4210 vaddss(dst, nds, Address(rscratch1, 0));
4211 }
4212 }
4213
4214 void MacroAssembler::vabsss(XMMRegister dst, XMMRegister nds, XMMRegister src, AddressLiteral negate_field, int vector_len) {
4215 int dst_enc = dst->encoding();
4216 int nds_enc = nds->encoding();
4217 int src_enc = src->encoding();
4218 if ((dst_enc < 16) && (nds_enc < 16)) {
4219 vandps(dst, nds, negate_field, vector_len);
4220 } else if ((src_enc < 16) && (dst_enc < 16)) {
4221 evmovdqul(src, nds, Assembler::AVX_512bit);
4222 vandps(dst, src, negate_field, vector_len);
4223 } else if (src_enc < 16) {
4224 evmovdqul(src, nds, Assembler::AVX_512bit);
4225 vandps(src, src, negate_field, vector_len);
4226 evmovdqul(dst, src, Assembler::AVX_512bit);
4227 } else if (dst_enc < 16) {
4228 evmovdqul(src, xmm0, Assembler::AVX_512bit);
4229 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4230 vandps(dst, xmm0, negate_field, vector_len);
4231 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4232 } else {
4233 if (src_enc != dst_enc) {
4234 evmovdqul(src, xmm0, Assembler::AVX_512bit);
4235 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4236 vandps(xmm0, xmm0, negate_field, vector_len);
4237 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4238 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4239 } else {
4240 subptr(rsp, 64);
4241 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4242 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4243 vandps(xmm0, xmm0, negate_field, vector_len);
4244 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4245 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4246 addptr(rsp, 64);
4247 }
4248 }
4249 }
4250
4251 void MacroAssembler::vabssd(XMMRegister dst, XMMRegister nds, XMMRegister src, AddressLiteral negate_field, int vector_len) {
4252 int dst_enc = dst->encoding();
4253 int nds_enc = nds->encoding();
4254 int src_enc = src->encoding();
4255 if ((dst_enc < 16) && (nds_enc < 16)) {
4256 vandpd(dst, nds, negate_field, vector_len);
4257 } else if ((src_enc < 16) && (dst_enc < 16)) {
4258 evmovdqul(src, nds, Assembler::AVX_512bit);
4259 vandpd(dst, src, negate_field, vector_len);
4260 } else if (src_enc < 16) {
4261 evmovdqul(src, nds, Assembler::AVX_512bit);
4262 vandpd(src, src, negate_field, vector_len);
4263 evmovdqul(dst, src, Assembler::AVX_512bit);
4264 } else if (dst_enc < 16) {
4265 evmovdqul(src, xmm0, Assembler::AVX_512bit);
4266 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4267 vandpd(dst, xmm0, negate_field, vector_len);
4268 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4269 } else {
4270 if (src_enc != dst_enc) {
4271 evmovdqul(src, xmm0, Assembler::AVX_512bit);
4272 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4273 vandpd(xmm0, xmm0, negate_field, vector_len);
4274 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4275 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4276 } else {
4277 subptr(rsp, 64);
4278 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4279 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4280 vandpd(xmm0, xmm0, negate_field, vector_len);
4281 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4282 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4283 addptr(rsp, 64);
4284 }
4285 }
4286 }
4287
4288 void MacroAssembler::vpaddb(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
4289 int dst_enc = dst->encoding();
4290 int nds_enc = nds->encoding();
4291 int src_enc = src->encoding();
4292 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4293 Assembler::vpaddb(dst, nds, src, vector_len);
4294 } else if ((dst_enc < 16) && (src_enc < 16)) {
4295 Assembler::vpaddb(dst, dst, src, vector_len);
4296 } else if ((dst_enc < 16) && (nds_enc < 16)) {
4297 // use nds as scratch for src
4298 evmovdqul(nds, src, Assembler::AVX_512bit);
4299 Assembler::vpaddb(dst, dst, nds, vector_len);
4300 } else if ((src_enc < 16) && (nds_enc < 16)) {
4301 // use nds as scratch for dst
4302 evmovdqul(nds, dst, Assembler::AVX_512bit);
4303 Assembler::vpaddb(nds, nds, src, vector_len);
4304 evmovdqul(dst, nds, Assembler::AVX_512bit);
4305 } else if (dst_enc < 16) {
4306 // use nds as scatch for xmm0 to hold src
4307 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4308 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4309 Assembler::vpaddb(dst, dst, xmm0, vector_len);
4310 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4311 } else {
4312 // worse case scenario, all regs are in the upper bank
4313 subptr(rsp, 64);
4314 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4315 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4316 evmovdqul(xmm1, src, Assembler::AVX_512bit);
4317 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4318 Assembler::vpaddb(xmm0, xmm0, xmm1, vector_len);
4319 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4320 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4321 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4322 addptr(rsp, 64);
4323 }
4324 }
4325
4326 void MacroAssembler::vpaddb(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
4327 int dst_enc = dst->encoding();
4328 int nds_enc = nds->encoding();
4329 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4330 Assembler::vpaddb(dst, nds, src, vector_len);
4331 } else if (dst_enc < 16) {
4332 Assembler::vpaddb(dst, dst, src, vector_len);
4333 } else if (nds_enc < 16) {
4334 // implies dst_enc in upper bank with src as scratch
4335 evmovdqul(nds, dst, Assembler::AVX_512bit);
4336 Assembler::vpaddb(nds, nds, src, vector_len);
4337 evmovdqul(dst, nds, Assembler::AVX_512bit);
4338 } else {
4339 // worse case scenario, all regs in upper bank
4340 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4341 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4342 Assembler::vpaddb(xmm0, xmm0, src, vector_len);
4343 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4344 }
4345 }
4346
4347 void MacroAssembler::vpaddw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
4348 int dst_enc = dst->encoding();
4349 int nds_enc = nds->encoding();
4350 int src_enc = src->encoding();
4351 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4352 Assembler::vpaddw(dst, nds, src, vector_len);
4353 } else if ((dst_enc < 16) && (src_enc < 16)) {
4354 Assembler::vpaddw(dst, dst, src, vector_len);
4355 } else if ((dst_enc < 16) && (nds_enc < 16)) {
4356 // use nds as scratch for src
4357 evmovdqul(nds, src, Assembler::AVX_512bit);
4358 Assembler::vpaddw(dst, dst, nds, vector_len);
4359 } else if ((src_enc < 16) && (nds_enc < 16)) {
4360 // use nds as scratch for dst
4361 evmovdqul(nds, dst, Assembler::AVX_512bit);
4362 Assembler::vpaddw(nds, nds, src, vector_len);
4363 evmovdqul(dst, nds, Assembler::AVX_512bit);
4364 } else if (dst_enc < 16) {
4365 // use nds as scatch for xmm0 to hold src
4366 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4367 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4368 Assembler::vpaddw(dst, dst, xmm0, vector_len);
4369 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4370 } else {
4371 // worse case scenario, all regs are in the upper bank
4372 subptr(rsp, 64);
4373 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4374 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4375 evmovdqul(xmm1, src, Assembler::AVX_512bit);
4376 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4377 Assembler::vpaddw(xmm0, xmm0, xmm1, vector_len);
4378 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4379 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4380 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4381 addptr(rsp, 64);
4382 }
4383 }
4384
4385 void MacroAssembler::vpaddw(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
4386 int dst_enc = dst->encoding();
4387 int nds_enc = nds->encoding();
4388 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4389 Assembler::vpaddw(dst, nds, src, vector_len);
4390 } else if (dst_enc < 16) {
4391 Assembler::vpaddw(dst, dst, src, vector_len);
4392 } else if (nds_enc < 16) {
4393 // implies dst_enc in upper bank with src as scratch
4394 evmovdqul(nds, dst, Assembler::AVX_512bit);
4395 Assembler::vpaddw(nds, nds, src, vector_len);
4396 evmovdqul(dst, nds, Assembler::AVX_512bit);
4397 } else {
4398 // worse case scenario, all regs in upper bank
4399 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4400 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4401 Assembler::vpaddw(xmm0, xmm0, src, vector_len);
4402 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4403 }
4404 }
4405
4406 void MacroAssembler::vpand(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len) {
4407 if (reachable(src)) {
4408 Assembler::vpand(dst, nds, as_Address(src), vector_len);
4409 } else {
4410 lea(rscratch1, src);
4411 Assembler::vpand(dst, nds, Address(rscratch1, 0), vector_len);
4412 }
4413 }
4414
4415 void MacroAssembler::vpbroadcastw(XMMRegister dst, XMMRegister src) {
4416 int dst_enc = dst->encoding();
4417 int src_enc = src->encoding();
4418 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4419 Assembler::vpbroadcastw(dst, src);
4420 } else if ((dst_enc < 16) && (src_enc < 16)) {
4421 Assembler::vpbroadcastw(dst, src);
4422 } else if (src_enc < 16) {
4423 subptr(rsp, 64);
4424 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4425 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4426 Assembler::vpbroadcastw(xmm0, src);
4427 movdqu(dst, xmm0);
4428 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4429 addptr(rsp, 64);
4430 } else if (dst_enc < 16) {
4431 subptr(rsp, 64);
4432 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4433 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4434 Assembler::vpbroadcastw(dst, xmm0);
4435 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4436 addptr(rsp, 64);
4437 } else {
4438 subptr(rsp, 64);
4439 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4440 subptr(rsp, 64);
4441 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4442 movdqu(xmm0, src);
4443 movdqu(xmm1, dst);
4444 Assembler::vpbroadcastw(xmm1, xmm0);
4445 movdqu(dst, xmm1);
4446 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4447 addptr(rsp, 64);
4448 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4449 addptr(rsp, 64);
4450 }
4451 }
4452
4453 void MacroAssembler::vpcmpeqb(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
4454 int dst_enc = dst->encoding();
4455 int nds_enc = nds->encoding();
4456 int src_enc = src->encoding();
4457 assert(dst_enc == nds_enc, "");
4458 if ((dst_enc < 16) && (src_enc < 16)) {
4459 Assembler::vpcmpeqb(dst, nds, src, vector_len);
4460 } else if (src_enc < 16) {
4461 subptr(rsp, 64);
4462 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4463 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4464 Assembler::vpcmpeqb(xmm0, xmm0, src, vector_len);
4465 movdqu(dst, xmm0);
4466 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4467 addptr(rsp, 64);
4468 } else if (dst_enc < 16) {
4469 subptr(rsp, 64);
4470 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4471 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4472 Assembler::vpcmpeqb(dst, dst, xmm0, vector_len);
4473 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4474 addptr(rsp, 64);
4475 } else {
4476 subptr(rsp, 64);
4477 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4478 subptr(rsp, 64);
4479 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4480 movdqu(xmm0, src);
4481 movdqu(xmm1, dst);
4482 Assembler::vpcmpeqb(xmm1, xmm1, xmm0, vector_len);
4483 movdqu(dst, xmm1);
4484 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4485 addptr(rsp, 64);
4486 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4487 addptr(rsp, 64);
4488 }
4489 }
4490
4491 void MacroAssembler::vpcmpeqw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
4492 int dst_enc = dst->encoding();
4493 int nds_enc = nds->encoding();
4494 int src_enc = src->encoding();
4495 assert(dst_enc == nds_enc, "");
4496 if ((dst_enc < 16) && (src_enc < 16)) {
4497 Assembler::vpcmpeqw(dst, nds, src, vector_len);
4498 } else if (src_enc < 16) {
4499 subptr(rsp, 64);
4500 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4501 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4502 Assembler::vpcmpeqw(xmm0, xmm0, src, vector_len);
4503 movdqu(dst, xmm0);
4504 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4505 addptr(rsp, 64);
4506 } else if (dst_enc < 16) {
4507 subptr(rsp, 64);
4508 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4509 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4510 Assembler::vpcmpeqw(dst, dst, xmm0, vector_len);
4511 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4512 addptr(rsp, 64);
4513 } else {
4514 subptr(rsp, 64);
4515 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4516 subptr(rsp, 64);
4517 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4518 movdqu(xmm0, src);
4519 movdqu(xmm1, dst);
4520 Assembler::vpcmpeqw(xmm1, xmm1, xmm0, vector_len);
4521 movdqu(dst, xmm1);
4522 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4523 addptr(rsp, 64);
4524 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4525 addptr(rsp, 64);
4526 }
4527 }
4528
4529 void MacroAssembler::vpmovzxbw(XMMRegister dst, Address src, int vector_len) {
4530 int dst_enc = dst->encoding();
4531 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4532 Assembler::vpmovzxbw(dst, src, vector_len);
4533 } else if (dst_enc < 16) {
4534 Assembler::vpmovzxbw(dst, src, vector_len);
4535 } else {
4536 subptr(rsp, 64);
4537 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4538 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4539 Assembler::vpmovzxbw(xmm0, src, vector_len);
4540 movdqu(dst, xmm0);
4541 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4542 addptr(rsp, 64);
4543 }
4544 }
4545
4546 void MacroAssembler::vpmovmskb(Register dst, XMMRegister src) {
4547 int src_enc = src->encoding();
4548 if (src_enc < 16) {
4549 Assembler::vpmovmskb(dst, src);
4550 } else {
4551 subptr(rsp, 64);
4552 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4553 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4554 Assembler::vpmovmskb(dst, xmm0);
4555 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4556 addptr(rsp, 64);
4557 }
4558 }
4559
4560 void MacroAssembler::vpmullw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
4561 int dst_enc = dst->encoding();
4562 int nds_enc = nds->encoding();
4563 int src_enc = src->encoding();
4564 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4565 Assembler::vpmullw(dst, nds, src, vector_len);
4566 } else if ((dst_enc < 16) && (src_enc < 16)) {
4567 Assembler::vpmullw(dst, dst, src, vector_len);
4568 } else if ((dst_enc < 16) && (nds_enc < 16)) {
4569 // use nds as scratch for src
4570 evmovdqul(nds, src, Assembler::AVX_512bit);
4571 Assembler::vpmullw(dst, dst, nds, vector_len);
4572 } else if ((src_enc < 16) && (nds_enc < 16)) {
4573 // use nds as scratch for dst
4574 evmovdqul(nds, dst, Assembler::AVX_512bit);
4575 Assembler::vpmullw(nds, nds, src, vector_len);
4576 evmovdqul(dst, nds, Assembler::AVX_512bit);
4577 } else if (dst_enc < 16) {
4578 // use nds as scatch for xmm0 to hold src
4579 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4580 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4581 Assembler::vpmullw(dst, dst, xmm0, vector_len);
4582 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4583 } else {
4584 // worse case scenario, all regs are in the upper bank
4585 subptr(rsp, 64);
4586 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4587 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4588 evmovdqul(xmm1, src, Assembler::AVX_512bit);
4589 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4590 Assembler::vpmullw(xmm0, xmm0, xmm1, vector_len);
4591 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4592 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4593 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4594 addptr(rsp, 64);
4595 }
4596 }
4597
4598 void MacroAssembler::vpmullw(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
4599 int dst_enc = dst->encoding();
4600 int nds_enc = nds->encoding();
4601 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4602 Assembler::vpmullw(dst, nds, src, vector_len);
4603 } else if (dst_enc < 16) {
4604 Assembler::vpmullw(dst, dst, src, vector_len);
4605 } else if (nds_enc < 16) {
4606 // implies dst_enc in upper bank with src as scratch
4607 evmovdqul(nds, dst, Assembler::AVX_512bit);
4608 Assembler::vpmullw(nds, nds, src, vector_len);
4609 evmovdqul(dst, nds, Assembler::AVX_512bit);
4610 } else {
4611 // worse case scenario, all regs in upper bank
4612 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4613 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4614 Assembler::vpmullw(xmm0, xmm0, src, vector_len);
4615 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4616 }
4617 }
4618
4619 void MacroAssembler::vpsubb(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
4620 int dst_enc = dst->encoding();
4621 int nds_enc = nds->encoding();
4622 int src_enc = src->encoding();
4623 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4624 Assembler::vpsubb(dst, nds, src, vector_len);
4625 } else if ((dst_enc < 16) && (src_enc < 16)) {
4626 Assembler::vpsubb(dst, dst, src, vector_len);
4627 } else if ((dst_enc < 16) && (nds_enc < 16)) {
4628 // use nds as scratch for src
4629 evmovdqul(nds, src, Assembler::AVX_512bit);
4630 Assembler::vpsubb(dst, dst, nds, vector_len);
4631 } else if ((src_enc < 16) && (nds_enc < 16)) {
4632 // use nds as scratch for dst
4633 evmovdqul(nds, dst, Assembler::AVX_512bit);
4634 Assembler::vpsubb(nds, nds, src, vector_len);
4635 evmovdqul(dst, nds, Assembler::AVX_512bit);
4636 } else if (dst_enc < 16) {
4637 // use nds as scatch for xmm0 to hold src
4638 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4639 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4640 Assembler::vpsubb(dst, dst, xmm0, vector_len);
4641 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4642 } else {
4643 // worse case scenario, all regs are in the upper bank
4644 subptr(rsp, 64);
4645 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4646 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4647 evmovdqul(xmm1, src, Assembler::AVX_512bit);
4648 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4649 Assembler::vpsubb(xmm0, xmm0, xmm1, vector_len);
4650 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4651 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4652 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4653 addptr(rsp, 64);
4654 }
4655 }
4656
4657 void MacroAssembler::vpsubb(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
4658 int dst_enc = dst->encoding();
4659 int nds_enc = nds->encoding();
4660 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4661 Assembler::vpsubb(dst, nds, src, vector_len);
4662 } else if (dst_enc < 16) {
4663 Assembler::vpsubb(dst, dst, src, vector_len);
4664 } else if (nds_enc < 16) {
4665 // implies dst_enc in upper bank with src as scratch
4666 evmovdqul(nds, dst, Assembler::AVX_512bit);
4667 Assembler::vpsubb(nds, nds, src, vector_len);
4668 evmovdqul(dst, nds, Assembler::AVX_512bit);
4669 } else {
4670 // worse case scenario, all regs in upper bank
4671 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4672 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4673 Assembler::vpsubw(xmm0, xmm0, src, vector_len);
4674 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4675 }
4676 }
4677
4678 void MacroAssembler::vpsubw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
4679 int dst_enc = dst->encoding();
4680 int nds_enc = nds->encoding();
4681 int src_enc = src->encoding();
4682 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4683 Assembler::vpsubw(dst, nds, src, vector_len);
4684 } else if ((dst_enc < 16) && (src_enc < 16)) {
4685 Assembler::vpsubw(dst, dst, src, vector_len);
4686 } else if ((dst_enc < 16) && (nds_enc < 16)) {
4687 // use nds as scratch for src
4688 evmovdqul(nds, src, Assembler::AVX_512bit);
4689 Assembler::vpsubw(dst, dst, nds, vector_len);
4690 } else if ((src_enc < 16) && (nds_enc < 16)) {
4691 // use nds as scratch for dst
4692 evmovdqul(nds, dst, Assembler::AVX_512bit);
4693 Assembler::vpsubw(nds, nds, src, vector_len);
4694 evmovdqul(dst, nds, Assembler::AVX_512bit);
4695 } else if (dst_enc < 16) {
4696 // use nds as scatch for xmm0 to hold src
4697 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4698 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4699 Assembler::vpsubw(dst, dst, xmm0, vector_len);
4700 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4701 } else {
4702 // worse case scenario, all regs are in the upper bank
4703 subptr(rsp, 64);
4704 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4705 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4706 evmovdqul(xmm1, src, Assembler::AVX_512bit);
4707 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4708 Assembler::vpsubw(xmm0, xmm0, xmm1, vector_len);
4709 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4710 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4711 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4712 addptr(rsp, 64);
4713 }
4714 }
4715
4716 void MacroAssembler::vpsubw(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
4717 int dst_enc = dst->encoding();
4718 int nds_enc = nds->encoding();
4719 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4720 Assembler::vpsubw(dst, nds, src, vector_len);
4721 } else if (dst_enc < 16) {
4722 Assembler::vpsubw(dst, dst, src, vector_len);
4723 } else if (nds_enc < 16) {
4724 // implies dst_enc in upper bank with src as scratch
4725 evmovdqul(nds, dst, Assembler::AVX_512bit);
4726 Assembler::vpsubw(nds, nds, src, vector_len);
4727 evmovdqul(dst, nds, Assembler::AVX_512bit);
4728 } else {
4729 // worse case scenario, all regs in upper bank
4730 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4731 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4732 Assembler::vpsubw(xmm0, xmm0, src, vector_len);
4733 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4734 }
4735 }
4736
4737 void MacroAssembler::vpsraw(XMMRegister dst, XMMRegister nds, XMMRegister shift, int vector_len) {
4738 int dst_enc = dst->encoding();
4739 int nds_enc = nds->encoding();
4740 int shift_enc = shift->encoding();
4741 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4742 Assembler::vpsraw(dst, nds, shift, vector_len);
4743 } else if ((dst_enc < 16) && (shift_enc < 16)) {
4744 Assembler::vpsraw(dst, dst, shift, vector_len);
4745 } else if ((dst_enc < 16) && (nds_enc < 16)) {
4746 // use nds_enc as scratch with shift
4747 evmovdqul(nds, shift, Assembler::AVX_512bit);
4748 Assembler::vpsraw(dst, dst, nds, vector_len);
4749 } else if ((shift_enc < 16) && (nds_enc < 16)) {
4750 // use nds as scratch with dst
4751 evmovdqul(nds, dst, Assembler::AVX_512bit);
4752 Assembler::vpsraw(nds, nds, shift, vector_len);
4753 evmovdqul(dst, nds, Assembler::AVX_512bit);
4754 } else if (dst_enc < 16) {
4755 // use nds to save a copy of xmm0 and hold shift
4756 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4757 evmovdqul(xmm0, shift, Assembler::AVX_512bit);
4758 Assembler::vpsraw(dst, dst, xmm0, vector_len);
4759 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4760 } else if (nds_enc < 16) {
4761 // use nds as dest as temps
4762 evmovdqul(nds, dst, Assembler::AVX_512bit);
4763 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4764 evmovdqul(xmm0, shift, Assembler::AVX_512bit);
4765 Assembler::vpsraw(nds, nds, xmm0, vector_len);
4766 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4767 evmovdqul(dst, nds, Assembler::AVX_512bit);
4768 } else {
4769 // worse case scenario, all regs are in the upper bank
4770 subptr(rsp, 64);
4771 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4772 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4773 evmovdqul(xmm1, shift, Assembler::AVX_512bit);
4774 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4775 Assembler::vpsllw(xmm0, xmm0, xmm1, vector_len);
4776 evmovdqul(xmm1, dst, Assembler::AVX_512bit);
4777 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4778 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4779 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4780 addptr(rsp, 64);
4781 }
4782 }
4783
4784 void MacroAssembler::vpsraw(XMMRegister dst, XMMRegister nds, int shift, int vector_len) {
4785 int dst_enc = dst->encoding();
4786 int nds_enc = nds->encoding();
4787 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4788 Assembler::vpsraw(dst, nds, shift, vector_len);
4789 } else if (dst_enc < 16) {
4790 Assembler::vpsraw(dst, dst, shift, vector_len);
4791 } else if (nds_enc < 16) {
4792 // use nds as scratch
4793 evmovdqul(nds, dst, Assembler::AVX_512bit);
4794 Assembler::vpsraw(nds, nds, shift, vector_len);
4795 evmovdqul(dst, nds, Assembler::AVX_512bit);
4796 } else {
4797 // use nds as scratch for xmm0
4798 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4799 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4800 Assembler::vpsraw(xmm0, xmm0, shift, vector_len);
4801 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4802 }
4803 }
4804
4805 void MacroAssembler::vpsrlw(XMMRegister dst, XMMRegister nds, XMMRegister shift, int vector_len) {
4806 int dst_enc = dst->encoding();
4807 int nds_enc = nds->encoding();
4808 int shift_enc = shift->encoding();
4809 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4810 Assembler::vpsrlw(dst, nds, shift, vector_len);
4811 } else if ((dst_enc < 16) && (shift_enc < 16)) {
4812 Assembler::vpsrlw(dst, dst, shift, vector_len);
4813 } else if ((dst_enc < 16) && (nds_enc < 16)) {
4814 // use nds_enc as scratch with shift
4815 evmovdqul(nds, shift, Assembler::AVX_512bit);
4816 Assembler::vpsrlw(dst, dst, nds, vector_len);
4817 } else if ((shift_enc < 16) && (nds_enc < 16)) {
4818 // use nds as scratch with dst
4819 evmovdqul(nds, dst, Assembler::AVX_512bit);
4820 Assembler::vpsrlw(nds, nds, shift, vector_len);
4821 evmovdqul(dst, nds, Assembler::AVX_512bit);
4822 } else if (dst_enc < 16) {
4823 // use nds to save a copy of xmm0 and hold shift
4824 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4825 evmovdqul(xmm0, shift, Assembler::AVX_512bit);
4826 Assembler::vpsrlw(dst, dst, xmm0, vector_len);
4827 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4828 } else if (nds_enc < 16) {
4829 // use nds as dest as temps
4830 evmovdqul(nds, dst, Assembler::AVX_512bit);
4831 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4832 evmovdqul(xmm0, shift, Assembler::AVX_512bit);
4833 Assembler::vpsrlw(nds, nds, xmm0, vector_len);
4834 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4835 evmovdqul(dst, nds, Assembler::AVX_512bit);
4836 } else {
4837 // worse case scenario, all regs are in the upper bank
4838 subptr(rsp, 64);
4839 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4840 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4841 evmovdqul(xmm1, shift, Assembler::AVX_512bit);
4842 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4843 Assembler::vpsllw(xmm0, xmm0, xmm1, vector_len);
4844 evmovdqul(xmm1, dst, Assembler::AVX_512bit);
4845 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4846 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4847 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4848 addptr(rsp, 64);
4849 }
4850 }
4851
4852 void MacroAssembler::vpsrlw(XMMRegister dst, XMMRegister nds, int shift, int vector_len) {
4853 int dst_enc = dst->encoding();
4854 int nds_enc = nds->encoding();
4855 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4856 Assembler::vpsrlw(dst, nds, shift, vector_len);
4857 } else if (dst_enc < 16) {
4858 Assembler::vpsrlw(dst, dst, shift, vector_len);
4859 } else if (nds_enc < 16) {
4860 // use nds as scratch
4861 evmovdqul(nds, dst, Assembler::AVX_512bit);
4862 Assembler::vpsrlw(nds, nds, shift, vector_len);
4863 evmovdqul(dst, nds, Assembler::AVX_512bit);
4864 } else {
4865 // use nds as scratch for xmm0
4866 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4867 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4868 Assembler::vpsrlw(xmm0, xmm0, shift, vector_len);
4869 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4870 }
4871 }
4872
4873 void MacroAssembler::vpsllw(XMMRegister dst, XMMRegister nds, XMMRegister shift, int vector_len) {
4874 int dst_enc = dst->encoding();
4875 int nds_enc = nds->encoding();
4876 int shift_enc = shift->encoding();
4877 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4878 Assembler::vpsllw(dst, nds, shift, vector_len);
4879 } else if ((dst_enc < 16) && (shift_enc < 16)) {
4880 Assembler::vpsllw(dst, dst, shift, vector_len);
4881 } else if ((dst_enc < 16) && (nds_enc < 16)) {
4882 // use nds_enc as scratch with shift
4883 evmovdqul(nds, shift, Assembler::AVX_512bit);
4884 Assembler::vpsllw(dst, dst, nds, vector_len);
4885 } else if ((shift_enc < 16) && (nds_enc < 16)) {
4886 // use nds as scratch with dst
4887 evmovdqul(nds, dst, Assembler::AVX_512bit);
4888 Assembler::vpsllw(nds, nds, shift, vector_len);
4889 evmovdqul(dst, nds, Assembler::AVX_512bit);
4890 } else if (dst_enc < 16) {
4891 // use nds to save a copy of xmm0 and hold shift
4892 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4893 evmovdqul(xmm0, shift, Assembler::AVX_512bit);
4894 Assembler::vpsllw(dst, dst, xmm0, vector_len);
4895 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4896 } else if (nds_enc < 16) {
4897 // use nds as dest as temps
4898 evmovdqul(nds, dst, Assembler::AVX_512bit);
4899 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4900 evmovdqul(xmm0, shift, Assembler::AVX_512bit);
4901 Assembler::vpsllw(nds, nds, xmm0, vector_len);
4902 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4903 evmovdqul(dst, nds, Assembler::AVX_512bit);
4904 } else {
4905 // worse case scenario, all regs are in the upper bank
4906 subptr(rsp, 64);
4907 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4908 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4909 evmovdqul(xmm1, shift, Assembler::AVX_512bit);
4910 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4911 Assembler::vpsllw(xmm0, xmm0, xmm1, vector_len);
4912 evmovdqul(xmm1, dst, Assembler::AVX_512bit);
4913 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4914 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4915 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4916 addptr(rsp, 64);
4917 }
4918 }
4919
4920 void MacroAssembler::vpsllw(XMMRegister dst, XMMRegister nds, int shift, int vector_len) {
4921 int dst_enc = dst->encoding();
4922 int nds_enc = nds->encoding();
4923 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4924 Assembler::vpsllw(dst, nds, shift, vector_len);
4925 } else if (dst_enc < 16) {
4926 Assembler::vpsllw(dst, dst, shift, vector_len);
4927 } else if (nds_enc < 16) {
4928 // use nds as scratch
4929 evmovdqul(nds, dst, Assembler::AVX_512bit);
4930 Assembler::vpsllw(nds, nds, shift, vector_len);
4931 evmovdqul(dst, nds, Assembler::AVX_512bit);
4932 } else {
4933 // use nds as scratch for xmm0
4934 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4935 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4936 Assembler::vpsllw(xmm0, xmm0, shift, vector_len);
4937 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4938 }
4939 }
4940
4941 void MacroAssembler::vptest(XMMRegister dst, XMMRegister src) {
4942 int dst_enc = dst->encoding();
4943 int src_enc = src->encoding();
4944 if ((dst_enc < 16) && (src_enc < 16)) {
4945 Assembler::vptest(dst, src);
4946 } else if (src_enc < 16) {
4947 subptr(rsp, 64);
4948 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4949 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4950 Assembler::vptest(xmm0, src);
4951 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4952 addptr(rsp, 64);
4953 } else if (dst_enc < 16) {
4954 subptr(rsp, 64);
4955 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4956 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4957 Assembler::vptest(dst, xmm0);
4958 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4959 addptr(rsp, 64);
4960 } else {
4961 subptr(rsp, 64);
4962 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4963 subptr(rsp, 64);
4964 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4965 movdqu(xmm0, src);
4966 movdqu(xmm1, dst);
4967 Assembler::vptest(xmm1, xmm0);
4968 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4969 addptr(rsp, 64);
4970 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4971 addptr(rsp, 64);
4972 }
4973 }
4974
4975 // This instruction exists within macros, ergo we cannot control its input
4976 // when emitted through those patterns.
4977 void MacroAssembler::punpcklbw(XMMRegister dst, XMMRegister src) {
4978 if (VM_Version::supports_avx512nobw()) {
4979 int dst_enc = dst->encoding();
4980 int src_enc = src->encoding();
4981 if (dst_enc == src_enc) {
4982 if (dst_enc < 16) {
4983 Assembler::punpcklbw(dst, src);
4984 } else {
4985 subptr(rsp, 64);
4986 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4987 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4988 Assembler::punpcklbw(xmm0, xmm0);
4989 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4990 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4991 addptr(rsp, 64);
4992 }
4993 } else {
4994 if ((src_enc < 16) && (dst_enc < 16)) {
4995 Assembler::punpcklbw(dst, src);
4996 } else if (src_enc < 16) {
4997 subptr(rsp, 64);
4998 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4999 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
5000 Assembler::punpcklbw(xmm0, src);
5001 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
5002 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
5003 addptr(rsp, 64);
5004 } else if (dst_enc < 16) {
5005 subptr(rsp, 64);
5006 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
5007 evmovdqul(xmm0, src, Assembler::AVX_512bit);
5008 Assembler::punpcklbw(dst, xmm0);
5009 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
5010 addptr(rsp, 64);
5011 } else {
5012 subptr(rsp, 64);
5013 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
5014 subptr(rsp, 64);
5015 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
5016 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
5017 evmovdqul(xmm1, src, Assembler::AVX_512bit);
5018 Assembler::punpcklbw(xmm0, xmm1);
5019 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
5020 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
5021 addptr(rsp, 64);
5022 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
5023 addptr(rsp, 64);
5024 }
5025 }
5026 } else {
5027 Assembler::punpcklbw(dst, src);
5028 }
5029 }
5030
5031 void MacroAssembler::pshufd(XMMRegister dst, Address src, int mode) {
5032 if (VM_Version::supports_avx512vl()) {
5033 Assembler::pshufd(dst, src, mode);
5034 } else {
5035 int dst_enc = dst->encoding();
5036 if (dst_enc < 16) {
5037 Assembler::pshufd(dst, src, mode);
5038 } else {
5039 subptr(rsp, 64);
5040 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
5041 Assembler::pshufd(xmm0, src, mode);
5042 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
5043 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
5044 addptr(rsp, 64);
5045 }
5046 }
5047 }
5048
5049 // This instruction exists within macros, ergo we cannot control its input
5050 // when emitted through those patterns.
5051 void MacroAssembler::pshuflw(XMMRegister dst, XMMRegister src, int mode) {
5052 if (VM_Version::supports_avx512nobw()) {
5053 int dst_enc = dst->encoding();
5054 int src_enc = src->encoding();
5055 if (dst_enc == src_enc) {
5056 if (dst_enc < 16) {
5057 Assembler::pshuflw(dst, src, mode);
5058 } else {
5059 subptr(rsp, 64);
5060 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
5061 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
5062 Assembler::pshuflw(xmm0, xmm0, mode);
5063 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
5064 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
5065 addptr(rsp, 64);
5066 }
5067 } else {
5068 if ((src_enc < 16) && (dst_enc < 16)) {
5069 Assembler::pshuflw(dst, src, mode);
5070 } else if (src_enc < 16) {
5071 subptr(rsp, 64);
5072 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
5073 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
5074 Assembler::pshuflw(xmm0, src, mode);
5075 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
5076 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
5077 addptr(rsp, 64);
5078 } else if (dst_enc < 16) {
5079 subptr(rsp, 64);
5080 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
5081 evmovdqul(xmm0, src, Assembler::AVX_512bit);
5082 Assembler::pshuflw(dst, xmm0, mode);
5083 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
5084 addptr(rsp, 64);
5085 } else {
5086 subptr(rsp, 64);
5087 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
5088 subptr(rsp, 64);
5089 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
5090 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
5091 evmovdqul(xmm1, src, Assembler::AVX_512bit);
5092 Assembler::pshuflw(xmm0, xmm1, mode);
5093 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
5094 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
5095 addptr(rsp, 64);
5096 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
5097 addptr(rsp, 64);
5098 }
5099 }
5100 } else {
5101 Assembler::pshuflw(dst, src, mode);
5102 }
5103 }
5104
5105 void MacroAssembler::vandpd(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len) {
5106 if (reachable(src)) {
5107 vandpd(dst, nds, as_Address(src), vector_len);
5108 } else {
5109 lea(rscratch1, src);
5110 vandpd(dst, nds, Address(rscratch1, 0), vector_len);
5111 }
5112 }
5113
5114 void MacroAssembler::vandps(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len) {
5115 if (reachable(src)) {
5116 vandps(dst, nds, as_Address(src), vector_len);
5117 } else {
5118 lea(rscratch1, src);
5119 vandps(dst, nds, Address(rscratch1, 0), vector_len);
5120 }
5121 }
5122
5123 void MacroAssembler::vdivsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
5124 if (reachable(src)) {
5125 vdivsd(dst, nds, as_Address(src));
5126 } else {
5127 lea(rscratch1, src);
5128 vdivsd(dst, nds, Address(rscratch1, 0));
5129 }
5130 }
5131
5132 void MacroAssembler::vdivss(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
5133 if (reachable(src)) {
5134 vdivss(dst, nds, as_Address(src));
5135 } else {
5136 lea(rscratch1, src);
5137 vdivss(dst, nds, Address(rscratch1, 0));
5138 }
5139 }
5140
5141 void MacroAssembler::vmulsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
5142 if (reachable(src)) {
5143 vmulsd(dst, nds, as_Address(src));
5144 } else {
5145 lea(rscratch1, src);
5146 vmulsd(dst, nds, Address(rscratch1, 0));
5147 }
5148 }
5149
5150 void MacroAssembler::vmulss(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
5151 if (reachable(src)) {
5152 vmulss(dst, nds, as_Address(src));
5153 } else {
5154 lea(rscratch1, src);
5155 vmulss(dst, nds, Address(rscratch1, 0));
5156 }
5157 }
5158
5159 void MacroAssembler::vsubsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
5160 if (reachable(src)) {
5161 vsubsd(dst, nds, as_Address(src));
5162 } else {
5163 lea(rscratch1, src);
5164 vsubsd(dst, nds, Address(rscratch1, 0));
5165 }
5166 }
5167
5168 void MacroAssembler::vsubss(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
5169 if (reachable(src)) {
5170 vsubss(dst, nds, as_Address(src));
5171 } else {
5172 lea(rscratch1, src);
5173 vsubss(dst, nds, Address(rscratch1, 0));
5174 }
5175 }
5176
5177 void MacroAssembler::vnegatess(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
5178 int nds_enc = nds->encoding();
5179 int dst_enc = dst->encoding();
5180 bool dst_upper_bank = (dst_enc > 15);
5181 bool nds_upper_bank = (nds_enc > 15);
5182 if (VM_Version::supports_avx512novl() &&
5183 (nds_upper_bank || dst_upper_bank)) {
5184 if (dst_upper_bank) {
5185 subptr(rsp, 64);
5186 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
5187 movflt(xmm0, nds);
5188 vxorps(xmm0, xmm0, src, Assembler::AVX_128bit);
5189 movflt(dst, xmm0);
5190 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
5191 addptr(rsp, 64);
5192 } else {
5193 movflt(dst, nds);
5194 vxorps(dst, dst, src, Assembler::AVX_128bit);
5195 }
5196 } else {
5197 vxorps(dst, nds, src, Assembler::AVX_128bit);
5198 }
5199 }
5200
5201 void MacroAssembler::vnegatesd(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
5202 int nds_enc = nds->encoding();
5203 int dst_enc = dst->encoding();
5204 bool dst_upper_bank = (dst_enc > 15);
5205 bool nds_upper_bank = (nds_enc > 15);
5206 if (VM_Version::supports_avx512novl() &&
5207 (nds_upper_bank || dst_upper_bank)) {
5208 if (dst_upper_bank) {
5209 subptr(rsp, 64);
5210 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
5211 movdbl(xmm0, nds);
5212 vxorpd(xmm0, xmm0, src, Assembler::AVX_128bit);
5213 movdbl(dst, xmm0);
5214 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
5215 addptr(rsp, 64);
5216 } else {
5217 movdbl(dst, nds);
5218 vxorpd(dst, dst, src, Assembler::AVX_128bit);
5219 }
5220 } else {
5221 vxorpd(dst, nds, src, Assembler::AVX_128bit);
5222 }
5223 }
5224
5225 void MacroAssembler::vxorpd(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len) {
5226 if (reachable(src)) {
5227 vxorpd(dst, nds, as_Address(src), vector_len);
5228 } else {
5229 lea(rscratch1, src);
5230 vxorpd(dst, nds, Address(rscratch1, 0), vector_len);
5231 }
5232 }
5233
5234 void MacroAssembler::vxorps(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len) {
5235 if (reachable(src)) {
5236 vxorps(dst, nds, as_Address(src), vector_len);
5237 } else {
5238 lea(rscratch1, src);
5239 vxorps(dst, nds, Address(rscratch1, 0), vector_len);
5240 }
5241 }
5242
5243
5244 void MacroAssembler::resolve_jobject(Register value,
5245 Register thread,
5246 Register tmp) {
5247 assert_different_registers(value, thread, tmp);
5248 Label done, not_weak;
5249 testptr(value, value);
5250 jcc(Assembler::zero, done); // Use NULL as-is.
5251 testptr(value, JNIHandles::weak_tag_mask); // Test for jweak tag.
5252 jcc(Assembler::zero, not_weak);
5253 // Resolve jweak.
5254 #if INCLUDE_ALL_GCS
5255 if (UseLoadBarrier) {
5256 load_barrier(value, Address(value, -JNIHandles::weak_tag_value), false /* expand call */, LoadBarrierOnPhantomOopRef);
5257 } else
5258 #endif
5259 {
5260 movptr(value, Address(value, -JNIHandles::weak_tag_value));
5261 }
5262 verify_oop(value);
5263 #if INCLUDE_ALL_GCS
5264 if (UseG1GC) {
5265 g1_write_barrier_pre(noreg /* obj */,
5266 value /* pre_val */,
5267 thread /* thread */,
5268 tmp /* tmp */,
5269 true /* tosca_live */,
5270 true /* expand_call */);
5271 }
5272 #endif // INCLUDE_ALL_GCS
5273 jmp(done);
5274 bind(not_weak);
5275 // Resolve (untagged) jobject.
5276 movptr(value, Address(value, 0));
5277 verify_oop(value);
5278 bind(done);
5279 }
5280
5281 void MacroAssembler::clear_jweak_tag(Register possibly_jweak) {
5282 const int32_t inverted_jweak_mask = ~static_cast<int32_t>(JNIHandles::weak_tag_mask);
5283 STATIC_ASSERT(inverted_jweak_mask == -2); // otherwise check this code
5284 // The inverted mask is sign-extended
5285 andptr(possibly_jweak, inverted_jweak_mask);
5286 }
5287
5288 //////////////////////////////////////////////////////////////////////////////////
5289 #if INCLUDE_ALL_GCS
5290
5291 void MacroAssembler::g1_write_barrier_pre(Register obj,
5292 Register pre_val,
5293 Register thread,
5294 Register tmp,
5295 bool tosca_live,
5296 bool expand_call) {
5297
5298 // If expand_call is true then we expand the call_VM_leaf macro
5299 // directly to skip generating the check by
5300 // InterpreterMacroAssembler::call_VM_leaf_base that checks _last_sp.
5301
5302 #ifdef _LP64
5303 assert(thread == r15_thread, "must be");
5304 #endif // _LP64
5305
5306 Label done;
5307 Label runtime;
5308
5309 assert(pre_val != noreg, "check this code");
5310
5311 if (obj != noreg) {
5312 assert_different_registers(obj, pre_val, tmp);
5313 assert(pre_val != rax, "check this code");
5314 }
5315
5316 Address in_progress(thread, in_bytes(JavaThread::satb_mark_queue_offset() +
5317 SATBMarkQueue::byte_offset_of_active()));
5318 Address index(thread, in_bytes(JavaThread::satb_mark_queue_offset() +
5319 SATBMarkQueue::byte_offset_of_index()));
5320 Address buffer(thread, in_bytes(JavaThread::satb_mark_queue_offset() +
5321 SATBMarkQueue::byte_offset_of_buf()));
5322
5323
5324 // Is marking active?
5325 if (in_bytes(SATBMarkQueue::byte_width_of_active()) == 4) {
5326 cmpl(in_progress, 0);
5327 } else {
5328 assert(in_bytes(SATBMarkQueue::byte_width_of_active()) == 1, "Assumption");
5329 cmpb(in_progress, 0);
5330 }
5331 jcc(Assembler::equal, done);
5332
5333 // Do we need to load the previous value?
5334 if (obj != noreg) {
5335 load_heap_oop(pre_val, Address(obj, 0));
5336 }
5337
5338 // Is the previous value null?
5339 cmpptr(pre_val, (int32_t) NULL_WORD);
5340 jcc(Assembler::equal, done);
5341
5342 // Can we store original value in the thread's buffer?
5343 // Is index == 0?
5344 // (The index field is typed as size_t.)
5345
5346 movptr(tmp, index); // tmp := *index_adr
5347 cmpptr(tmp, 0); // tmp == 0?
5348 jcc(Assembler::equal, runtime); // If yes, goto runtime
5349
5350 subptr(tmp, wordSize); // tmp := tmp - wordSize
5351 movptr(index, tmp); // *index_adr := tmp
5352 addptr(tmp, buffer); // tmp := tmp + *buffer_adr
5353
5354 // Record the previous value
5355 movptr(Address(tmp, 0), pre_val);
5356 jmp(done);
5357
5358 bind(runtime);
5359 // save the live input values
5360 if(tosca_live) push(rax);
5361
5362 if (obj != noreg && obj != rax)
5363 push(obj);
5364
5365 if (pre_val != rax)
5366 push(pre_val);
5367
5368 // Calling the runtime using the regular call_VM_leaf mechanism generates
5369 // code (generated by InterpreterMacroAssember::call_VM_leaf_base)
5370 // that checks that the *(ebp+frame::interpreter_frame_last_sp) == NULL.
5371 //
5372 // If we care generating the pre-barrier without a frame (e.g. in the
5373 // intrinsified Reference.get() routine) then ebp might be pointing to
5374 // the caller frame and so this check will most likely fail at runtime.
5375 //
5376 // Expanding the call directly bypasses the generation of the check.
5377 // So when we do not have have a full interpreter frame on the stack
5378 // expand_call should be passed true.
5379
5380 NOT_LP64( push(thread); )
5381
5382 if (expand_call) {
5383 LP64_ONLY( assert(pre_val != c_rarg1, "smashed arg"); )
5384 pass_arg1(this, thread);
5385 pass_arg0(this, pre_val);
5386 MacroAssembler::call_VM_leaf_base(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_pre), 2);
5387 } else {
5388 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_pre), pre_val, thread);
5389 }
5390
5391 NOT_LP64( pop(thread); )
5392
5393 // save the live input values
5394 if (pre_val != rax)
5395 pop(pre_val);
5396
5397 if (obj != noreg && obj != rax)
5398 pop(obj);
5399
5400 if(tosca_live) pop(rax);
5401
5402 bind(done);
5403 }
5404
5405 void MacroAssembler::g1_write_barrier_post(Register store_addr,
5406 Register new_val,
5407 Register thread,
5408 Register tmp,
5409 Register tmp2) {
5410 #ifdef _LP64
5411 assert(thread == r15_thread, "must be");
5412 #endif // _LP64
5413
5414 Address queue_index(thread, in_bytes(JavaThread::dirty_card_queue_offset() +
5415 DirtyCardQueue::byte_offset_of_index()));
5416 Address buffer(thread, in_bytes(JavaThread::dirty_card_queue_offset() +
5417 DirtyCardQueue::byte_offset_of_buf()));
5418
5419 CardTableModRefBS* ctbs =
5420 barrier_set_cast<CardTableModRefBS>(Universe::heap()->barrier_set());
5421 CardTable* ct = ctbs->card_table();
5422 assert(sizeof(*ct->byte_map_base()) == sizeof(jbyte), "adjust this code");
5423
5424 Label done;
5425 Label runtime;
5426
5427 // Does store cross heap regions?
5428
5429 movptr(tmp, store_addr);
5430 xorptr(tmp, new_val);
5431 shrptr(tmp, HeapRegion::LogOfHRGrainBytes);
5432 jcc(Assembler::equal, done);
5433
5434 // crosses regions, storing NULL?
5435
5436 cmpptr(new_val, (int32_t) NULL_WORD);
5437 jcc(Assembler::equal, done);
5438
5439 // storing region crossing non-NULL, is card already dirty?
5440
5441 const Register card_addr = tmp;
5442 const Register cardtable = tmp2;
5443
5444 movptr(card_addr, store_addr);
5445 shrptr(card_addr, CardTable::card_shift);
5446 // Do not use ExternalAddress to load 'byte_map_base', since 'byte_map_base' is NOT
5447 // a valid address and therefore is not properly handled by the relocation code.
5448 movptr(cardtable, (intptr_t)ct->byte_map_base());
5449 addptr(card_addr, cardtable);
5450
5451 cmpb(Address(card_addr, 0), (int)G1CardTable::g1_young_card_val());
5452 jcc(Assembler::equal, done);
5453
5454 membar(Assembler::Membar_mask_bits(Assembler::StoreLoad));
5455 cmpb(Address(card_addr, 0), (int)CardTable::dirty_card_val());
5456 jcc(Assembler::equal, done);
5457
5458
5459 // storing a region crossing, non-NULL oop, card is clean.
5460 // dirty card and log.
5461
5462 movb(Address(card_addr, 0), (int)CardTable::dirty_card_val());
5463
5464 cmpl(queue_index, 0);
5465 jcc(Assembler::equal, runtime);
5466 subl(queue_index, wordSize);
5467 movptr(tmp2, buffer);
5468 #ifdef _LP64
5469 movslq(rscratch1, queue_index);
5470 addq(tmp2, rscratch1);
5471 movq(Address(tmp2, 0), card_addr);
5472 #else
5473 addl(tmp2, queue_index);
5474 movl(Address(tmp2, 0), card_addr);
5475 #endif
5476 jmp(done);
5477
5478 bind(runtime);
5479 // save the live input values
5480 push(store_addr);
5481 push(new_val);
5482 #ifdef _LP64
5483 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_post), card_addr, r15_thread);
5484 #else
5485 push(thread);
5486 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_post), card_addr, thread);
5487 pop(thread);
5488 #endif
5489 pop(new_val);
5490 pop(store_addr);
5491
5492 bind(done);
5493 }
5494
5495 #endif // INCLUDE_ALL_GCS
5496 //////////////////////////////////////////////////////////////////////////////////
5497
5498
5499 void MacroAssembler::store_check(Register obj, Address dst) {
5500 store_check(obj);
5501 }
5502
5503 void MacroAssembler::store_check(Register obj) {
5504 // Does a store check for the oop in register obj. The content of
5505 // register obj is destroyed afterwards.
5506 BarrierSet* bs = Universe::heap()->barrier_set();
5507 assert(bs->kind() == BarrierSet::CardTableModRef,
5508 "Wrong barrier set kind");
5509
5510 CardTableModRefBS* ctbs = barrier_set_cast<CardTableModRefBS>(bs);
5511 CardTable* ct = ctbs->card_table();
5512 assert(sizeof(*ct->byte_map_base()) == sizeof(jbyte), "adjust this code");
5513
5514 shrptr(obj, CardTable::card_shift);
5515
5516 Address card_addr;
5517
5518 // The calculation for byte_map_base is as follows:
5519 // byte_map_base = _byte_map - (uintptr_t(low_bound) >> card_shift);
5520 // So this essentially converts an address to a displacement and it will
5521 // never need to be relocated. On 64bit however the value may be too
5522 // large for a 32bit displacement.
5523 intptr_t disp = (intptr_t) ct->byte_map_base();
5524 if (is_simm32(disp)) {
5525 card_addr = Address(noreg, obj, Address::times_1, disp);
5526 } else {
5527 // By doing it as an ExternalAddress 'disp' could be converted to a rip-relative
5528 // displacement and done in a single instruction given favorable mapping and a
5529 // smarter version of as_Address. However, 'ExternalAddress' generates a relocation
5530 // entry and that entry is not properly handled by the relocation code.
5531 AddressLiteral cardtable((address)ct->byte_map_base(), relocInfo::none);
5532 Address index(noreg, obj, Address::times_1);
5533 card_addr = as_Address(ArrayAddress(cardtable, index));
5534 }
5535
5536 int dirty = CardTable::dirty_card_val();
5537 if (UseCondCardMark) {
5538 Label L_already_dirty;
5539 if (UseConcMarkSweepGC) {
5540 membar(Assembler::StoreLoad);
5541 }
5542 cmpb(card_addr, dirty);
5543 jcc(Assembler::equal, L_already_dirty);
5544 movb(card_addr, dirty);
5545 bind(L_already_dirty);
5546 } else {
5547 movb(card_addr, dirty);
5548 }
5549 }
5550
5551 void MacroAssembler::subptr(Register dst, int32_t imm32) {
5552 LP64_ONLY(subq(dst, imm32)) NOT_LP64(subl(dst, imm32));
5553 }
5554
5555 // Force generation of a 4 byte immediate value even if it fits into 8bit
5556 void MacroAssembler::subptr_imm32(Register dst, int32_t imm32) {
5557 LP64_ONLY(subq_imm32(dst, imm32)) NOT_LP64(subl_imm32(dst, imm32));
5558 }
5559
5560 void MacroAssembler::subptr(Register dst, Register src) {
5561 LP64_ONLY(subq(dst, src)) NOT_LP64(subl(dst, src));
5562 }
5563
5564 // C++ bool manipulation
5565 void MacroAssembler::testbool(Register dst) {
5566 if(sizeof(bool) == 1)
5567 testb(dst, 0xff);
5568 else if(sizeof(bool) == 2) {
5569 // testw implementation needed for two byte bools
5570 ShouldNotReachHere();
5571 } else if(sizeof(bool) == 4)
5572 testl(dst, dst);
5573 else
5574 // unsupported
5575 ShouldNotReachHere();
5576 }
5577
5578 void MacroAssembler::testptr(Register dst, Register src) {
5579 LP64_ONLY(testq(dst, src)) NOT_LP64(testl(dst, src));
5580 }
5581
5582 // Defines obj, preserves var_size_in_bytes, okay for t2 == var_size_in_bytes.
5583 void MacroAssembler::tlab_allocate(Register obj,
5584 Register var_size_in_bytes,
5585 int con_size_in_bytes,
5586 Register t1,
5587 Register t2,
5588 Label& slow_case) {
5589 assert_different_registers(obj, t1, t2);
5590 assert_different_registers(obj, var_size_in_bytes, t1);
5591 Register end = t2;
5592 Register thread = NOT_LP64(t1) LP64_ONLY(r15_thread);
5593
5594 verify_tlab();
5595
5596 NOT_LP64(get_thread(thread));
5597
5598 movptr(obj, Address(thread, JavaThread::tlab_top_offset()));
5599 if (var_size_in_bytes == noreg) {
5600 lea(end, Address(obj, con_size_in_bytes));
5601 } else {
5602 lea(end, Address(obj, var_size_in_bytes, Address::times_1));
5603 }
5604 cmpptr(end, Address(thread, JavaThread::tlab_end_offset()));
5605 jcc(Assembler::above, slow_case);
5606
5607 // update the tlab top pointer
5608 movptr(Address(thread, JavaThread::tlab_top_offset()), end);
5609
5610 // recover var_size_in_bytes if necessary
5611 if (var_size_in_bytes == end) {
5612 subptr(var_size_in_bytes, obj);
5613 }
5614 verify_tlab();
5615 }
5616
5617 // Preserves the contents of address, destroys the contents length_in_bytes and temp.
5618 void MacroAssembler::zero_memory(Register address, Register length_in_bytes, int offset_in_bytes, Register temp) {
5619 assert(address != length_in_bytes && address != temp && temp != length_in_bytes, "registers must be different");
5620 assert((offset_in_bytes & (BytesPerWord - 1)) == 0, "offset must be a multiple of BytesPerWord");
5621 Label done;
5622
5623 testptr(length_in_bytes, length_in_bytes);
5624 jcc(Assembler::zero, done);
5625
5626 // initialize topmost word, divide index by 2, check if odd and test if zero
5627 // note: for the remaining code to work, index must be a multiple of BytesPerWord
5628 #ifdef ASSERT
5629 {
5630 Label L;
5631 testptr(length_in_bytes, BytesPerWord - 1);
5632 jcc(Assembler::zero, L);
5633 stop("length must be a multiple of BytesPerWord");
5634 bind(L);
5635 }
5636 #endif
5637 Register index = length_in_bytes;
5638 xorptr(temp, temp); // use _zero reg to clear memory (shorter code)
5639 if (UseIncDec) {
5640 shrptr(index, 3); // divide by 8/16 and set carry flag if bit 2 was set
5641 } else {
5642 shrptr(index, 2); // use 2 instructions to avoid partial flag stall
5643 shrptr(index, 1);
5644 }
5645 #ifndef _LP64
5646 // index could have not been a multiple of 8 (i.e., bit 2 was set)
5647 {
5648 Label even;
5649 // note: if index was a multiple of 8, then it cannot
5650 // be 0 now otherwise it must have been 0 before
5651 // => if it is even, we don't need to check for 0 again
5652 jcc(Assembler::carryClear, even);
5653 // clear topmost word (no jump would be needed if conditional assignment worked here)
5654 movptr(Address(address, index, Address::times_8, offset_in_bytes - 0*BytesPerWord), temp);
5655 // index could be 0 now, must check again
5656 jcc(Assembler::zero, done);
5657 bind(even);
5658 }
5659 #endif // !_LP64
5660 // initialize remaining object fields: index is a multiple of 2 now
5661 {
5662 Label loop;
5663 bind(loop);
5664 movptr(Address(address, index, Address::times_8, offset_in_bytes - 1*BytesPerWord), temp);
5665 NOT_LP64(movptr(Address(address, index, Address::times_8, offset_in_bytes - 2*BytesPerWord), temp);)
5666 decrement(index);
5667 jcc(Assembler::notZero, loop);
5668 }
5669
5670 bind(done);
5671 }
5672
5673 void MacroAssembler::incr_allocated_bytes(Register thread,
5674 Register var_size_in_bytes,
5675 int con_size_in_bytes,
5676 Register t1) {
5677 if (!thread->is_valid()) {
5678 #ifdef _LP64
5679 thread = r15_thread;
5680 #else
5681 assert(t1->is_valid(), "need temp reg");
5682 thread = t1;
5683 get_thread(thread);
5684 #endif
5685 }
5686
5687 #ifdef _LP64
5688 if (var_size_in_bytes->is_valid()) {
5689 addq(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), var_size_in_bytes);
5690 } else {
5691 addq(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), con_size_in_bytes);
5692 }
5693 #else
5694 if (var_size_in_bytes->is_valid()) {
5695 addl(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), var_size_in_bytes);
5696 } else {
5697 addl(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), con_size_in_bytes);
5698 }
5699 adcl(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())+4), 0);
5700 #endif
5701 }
5702
5703 // Look up the method for a megamorphic invokeinterface call.
5704 // The target method is determined by <intf_klass, itable_index>.
5705 // The receiver klass is in recv_klass.
5706 // On success, the result will be in method_result, and execution falls through.
5707 // On failure, execution transfers to the given label.
5708 void MacroAssembler::lookup_interface_method(Register recv_klass,
5709 Register intf_klass,
5710 RegisterOrConstant itable_index,
5711 Register method_result,
5712 Register scan_temp,
5713 Label& L_no_such_interface,
5714 bool return_method) {
5715 assert_different_registers(recv_klass, intf_klass, scan_temp);
5716 assert_different_registers(method_result, intf_klass, scan_temp);
5717 assert(recv_klass != method_result || !return_method,
5718 "recv_klass can be destroyed when method isn't needed");
5719
5720 assert(itable_index.is_constant() || itable_index.as_register() == method_result,
5721 "caller must use same register for non-constant itable index as for method");
5722
5723 // Compute start of first itableOffsetEntry (which is at the end of the vtable)
5724 int vtable_base = in_bytes(Klass::vtable_start_offset());
5725 int itentry_off = itableMethodEntry::method_offset_in_bytes();
5726 int scan_step = itableOffsetEntry::size() * wordSize;
5727 int vte_size = vtableEntry::size_in_bytes();
5728 Address::ScaleFactor times_vte_scale = Address::times_ptr;
5729 assert(vte_size == wordSize, "else adjust times_vte_scale");
5730
5731 movl(scan_temp, Address(recv_klass, Klass::vtable_length_offset()));
5732
5733 // %%% Could store the aligned, prescaled offset in the klassoop.
5734 lea(scan_temp, Address(recv_klass, scan_temp, times_vte_scale, vtable_base));
5735
5736 if (return_method) {
5737 // Adjust recv_klass by scaled itable_index, so we can free itable_index.
5738 assert(itableMethodEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
5739 lea(recv_klass, Address(recv_klass, itable_index, Address::times_ptr, itentry_off));
5740 }
5741
5742 // for (scan = klass->itable(); scan->interface() != NULL; scan += scan_step) {
5743 // if (scan->interface() == intf) {
5744 // result = (klass + scan->offset() + itable_index);
5745 // }
5746 // }
5747 Label search, found_method;
5748
5749 for (int peel = 1; peel >= 0; peel--) {
5750 movptr(method_result, Address(scan_temp, itableOffsetEntry::interface_offset_in_bytes()));
5751 cmpptr(intf_klass, method_result);
5752
5753 if (peel) {
5754 jccb(Assembler::equal, found_method);
5755 } else {
5756 jccb(Assembler::notEqual, search);
5757 // (invert the test to fall through to found_method...)
5758 }
5759
5760 if (!peel) break;
5761
5762 bind(search);
5763
5764 // Check that the previous entry is non-null. A null entry means that
5765 // the receiver class doesn't implement the interface, and wasn't the
5766 // same as when the caller was compiled.
5767 testptr(method_result, method_result);
5768 jcc(Assembler::zero, L_no_such_interface);
5769 addptr(scan_temp, scan_step);
5770 }
5771
5772 bind(found_method);
5773
5774 if (return_method) {
5775 // Got a hit.
5776 movl(scan_temp, Address(scan_temp, itableOffsetEntry::offset_offset_in_bytes()));
5777 movptr(method_result, Address(recv_klass, scan_temp, Address::times_1));
5778 }
5779 }
5780
5781
5782 // virtual method calling
5783 void MacroAssembler::lookup_virtual_method(Register recv_klass,
5784 RegisterOrConstant vtable_index,
5785 Register method_result) {
5786 const int base = in_bytes(Klass::vtable_start_offset());
5787 assert(vtableEntry::size() * wordSize == wordSize, "else adjust the scaling in the code below");
5788 Address vtable_entry_addr(recv_klass,
5789 vtable_index, Address::times_ptr,
5790 base + vtableEntry::method_offset_in_bytes());
5791 movptr(method_result, vtable_entry_addr);
5792 }
5793
5794
5795 void MacroAssembler::check_klass_subtype(Register sub_klass,
5796 Register super_klass,
5797 Register temp_reg,
5798 Label& L_success) {
5799 Label L_failure;
5800 check_klass_subtype_fast_path(sub_klass, super_klass, temp_reg, &L_success, &L_failure, NULL);
5801 check_klass_subtype_slow_path(sub_klass, super_klass, temp_reg, noreg, &L_success, NULL);
5802 bind(L_failure);
5803 }
5804
5805
5806 void MacroAssembler::check_klass_subtype_fast_path(Register sub_klass,
5807 Register super_klass,
5808 Register temp_reg,
5809 Label* L_success,
5810 Label* L_failure,
5811 Label* L_slow_path,
5812 RegisterOrConstant super_check_offset) {
5813 assert_different_registers(sub_klass, super_klass, temp_reg);
5814 bool must_load_sco = (super_check_offset.constant_or_zero() == -1);
5815 if (super_check_offset.is_register()) {
5816 assert_different_registers(sub_klass, super_klass,
5817 super_check_offset.as_register());
5818 } else if (must_load_sco) {
5819 assert(temp_reg != noreg, "supply either a temp or a register offset");
5820 }
5821
5822 Label L_fallthrough;
5823 int label_nulls = 0;
5824 if (L_success == NULL) { L_success = &L_fallthrough; label_nulls++; }
5825 if (L_failure == NULL) { L_failure = &L_fallthrough; label_nulls++; }
5826 if (L_slow_path == NULL) { L_slow_path = &L_fallthrough; label_nulls++; }
5827 assert(label_nulls <= 1, "at most one NULL in the batch");
5828
5829 int sc_offset = in_bytes(Klass::secondary_super_cache_offset());
5830 int sco_offset = in_bytes(Klass::super_check_offset_offset());
5831 Address super_check_offset_addr(super_klass, sco_offset);
5832
5833 // Hacked jcc, which "knows" that L_fallthrough, at least, is in
5834 // range of a jccb. If this routine grows larger, reconsider at
5835 // least some of these.
5836 #define local_jcc(assembler_cond, label) \
5837 if (&(label) == &L_fallthrough) jccb(assembler_cond, label); \
5838 else jcc( assembler_cond, label) /*omit semi*/
5839
5840 // Hacked jmp, which may only be used just before L_fallthrough.
5841 #define final_jmp(label) \
5842 if (&(label) == &L_fallthrough) { /*do nothing*/ } \
5843 else jmp(label) /*omit semi*/
5844
5845 // If the pointers are equal, we are done (e.g., String[] elements).
5846 // This self-check enables sharing of secondary supertype arrays among
5847 // non-primary types such as array-of-interface. Otherwise, each such
5848 // type would need its own customized SSA.
5849 // We move this check to the front of the fast path because many
5850 // type checks are in fact trivially successful in this manner,
5851 // so we get a nicely predicted branch right at the start of the check.
5852 cmpptr(sub_klass, super_klass);
5853 local_jcc(Assembler::equal, *L_success);
5854
5855 // Check the supertype display:
5856 if (must_load_sco) {
5857 // Positive movl does right thing on LP64.
5858 movl(temp_reg, super_check_offset_addr);
5859 super_check_offset = RegisterOrConstant(temp_reg);
5860 }
5861 Address super_check_addr(sub_klass, super_check_offset, Address::times_1, 0);
5862 cmpptr(super_klass, super_check_addr); // load displayed supertype
5863
5864 // This check has worked decisively for primary supers.
5865 // Secondary supers are sought in the super_cache ('super_cache_addr').
5866 // (Secondary supers are interfaces and very deeply nested subtypes.)
5867 // This works in the same check above because of a tricky aliasing
5868 // between the super_cache and the primary super display elements.
5869 // (The 'super_check_addr' can address either, as the case requires.)
5870 // Note that the cache is updated below if it does not help us find
5871 // what we need immediately.
5872 // So if it was a primary super, we can just fail immediately.
5873 // Otherwise, it's the slow path for us (no success at this point).
5874
5875 if (super_check_offset.is_register()) {
5876 local_jcc(Assembler::equal, *L_success);
5877 cmpl(super_check_offset.as_register(), sc_offset);
5878 if (L_failure == &L_fallthrough) {
5879 local_jcc(Assembler::equal, *L_slow_path);
5880 } else {
5881 local_jcc(Assembler::notEqual, *L_failure);
5882 final_jmp(*L_slow_path);
5883 }
5884 } else if (super_check_offset.as_constant() == sc_offset) {
5885 // Need a slow path; fast failure is impossible.
5886 if (L_slow_path == &L_fallthrough) {
5887 local_jcc(Assembler::equal, *L_success);
5888 } else {
5889 local_jcc(Assembler::notEqual, *L_slow_path);
5890 final_jmp(*L_success);
5891 }
5892 } else {
5893 // No slow path; it's a fast decision.
5894 if (L_failure == &L_fallthrough) {
5895 local_jcc(Assembler::equal, *L_success);
5896 } else {
5897 local_jcc(Assembler::notEqual, *L_failure);
5898 final_jmp(*L_success);
5899 }
5900 }
5901
5902 bind(L_fallthrough);
5903
5904 #undef local_jcc
5905 #undef final_jmp
5906 }
5907
5908
5909 void MacroAssembler::check_klass_subtype_slow_path(Register sub_klass,
5910 Register super_klass,
5911 Register temp_reg,
5912 Register temp2_reg,
5913 Label* L_success,
5914 Label* L_failure,
5915 bool set_cond_codes) {
5916 assert_different_registers(sub_klass, super_klass, temp_reg);
5917 if (temp2_reg != noreg)
5918 assert_different_registers(sub_klass, super_klass, temp_reg, temp2_reg);
5919 #define IS_A_TEMP(reg) ((reg) == temp_reg || (reg) == temp2_reg)
5920
5921 Label L_fallthrough;
5922 int label_nulls = 0;
5923 if (L_success == NULL) { L_success = &L_fallthrough; label_nulls++; }
5924 if (L_failure == NULL) { L_failure = &L_fallthrough; label_nulls++; }
5925 assert(label_nulls <= 1, "at most one NULL in the batch");
5926
5927 // a couple of useful fields in sub_klass:
5928 int ss_offset = in_bytes(Klass::secondary_supers_offset());
5929 int sc_offset = in_bytes(Klass::secondary_super_cache_offset());
5930 Address secondary_supers_addr(sub_klass, ss_offset);
5931 Address super_cache_addr( sub_klass, sc_offset);
5932
5933 // Do a linear scan of the secondary super-klass chain.
5934 // This code is rarely used, so simplicity is a virtue here.
5935 // The repne_scan instruction uses fixed registers, which we must spill.
5936 // Don't worry too much about pre-existing connections with the input regs.
5937
5938 assert(sub_klass != rax, "killed reg"); // killed by mov(rax, super)
5939 assert(sub_klass != rcx, "killed reg"); // killed by lea(rcx, &pst_counter)
5940
5941 // Get super_klass value into rax (even if it was in rdi or rcx).
5942 bool pushed_rax = false, pushed_rcx = false, pushed_rdi = false;
5943 if (super_klass != rax || UseCompressedOops) {
5944 if (!IS_A_TEMP(rax)) { push(rax); pushed_rax = true; }
5945 mov(rax, super_klass);
5946 }
5947 if (!IS_A_TEMP(rcx)) { push(rcx); pushed_rcx = true; }
5948 if (!IS_A_TEMP(rdi)) { push(rdi); pushed_rdi = true; }
5949
5950 #ifndef PRODUCT
5951 int* pst_counter = &SharedRuntime::_partial_subtype_ctr;
5952 ExternalAddress pst_counter_addr((address) pst_counter);
5953 NOT_LP64( incrementl(pst_counter_addr) );
5954 LP64_ONLY( lea(rcx, pst_counter_addr) );
5955 LP64_ONLY( incrementl(Address(rcx, 0)) );
5956 #endif //PRODUCT
5957
5958 // We will consult the secondary-super array.
5959 movptr(rdi, secondary_supers_addr);
5960 // Load the array length. (Positive movl does right thing on LP64.)
5961 movl(rcx, Address(rdi, Array<Klass*>::length_offset_in_bytes()));
5962 // Skip to start of data.
5963 addptr(rdi, Array<Klass*>::base_offset_in_bytes());
5964
5965 // Scan RCX words at [RDI] for an occurrence of RAX.
5966 // Set NZ/Z based on last compare.
5967 // Z flag value will not be set by 'repne' if RCX == 0 since 'repne' does
5968 // not change flags (only scas instruction which is repeated sets flags).
5969 // Set Z = 0 (not equal) before 'repne' to indicate that class was not found.
5970
5971 testptr(rax,rax); // Set Z = 0
5972 repne_scan();
5973
5974 // Unspill the temp. registers:
5975 if (pushed_rdi) pop(rdi);
5976 if (pushed_rcx) pop(rcx);
5977 if (pushed_rax) pop(rax);
5978
5979 if (set_cond_codes) {
5980 // Special hack for the AD files: rdi is guaranteed non-zero.
5981 assert(!pushed_rdi, "rdi must be left non-NULL");
5982 // Also, the condition codes are properly set Z/NZ on succeed/failure.
5983 }
5984
5985 if (L_failure == &L_fallthrough)
5986 jccb(Assembler::notEqual, *L_failure);
5987 else jcc(Assembler::notEqual, *L_failure);
5988
5989 // Success. Cache the super we found and proceed in triumph.
5990 movptr(super_cache_addr, super_klass);
5991
5992 if (L_success != &L_fallthrough) {
5993 jmp(*L_success);
5994 }
5995
5996 #undef IS_A_TEMP
5997
5998 bind(L_fallthrough);
5999 }
6000
6001
6002 void MacroAssembler::cmov32(Condition cc, Register dst, Address src) {
6003 if (VM_Version::supports_cmov()) {
6004 cmovl(cc, dst, src);
6005 } else {
6006 Label L;
6007 jccb(negate_condition(cc), L);
6008 movl(dst, src);
6009 bind(L);
6010 }
6011 }
6012
6013 void MacroAssembler::cmov32(Condition cc, Register dst, Register src) {
6014 if (VM_Version::supports_cmov()) {
6015 cmovl(cc, dst, src);
6016 } else {
6017 Label L;
6018 jccb(negate_condition(cc), L);
6019 movl(dst, src);
6020 bind(L);
6021 }
6022 }
6023
6024 void MacroAssembler::verify_oop(Register reg, const char* s) {
6025 if (!VerifyOops) return;
6026
6027 // Pass register number to verify_oop_subroutine
6028 const char* b = NULL;
6029 {
6030 ResourceMark rm;
6031 stringStream ss;
6032 ss.print("verify_oop: %s: %s", reg->name(), s);
6033 b = code_string(ss.as_string());
6034 }
6035 BLOCK_COMMENT("verify_oop {");
6036 #ifdef _LP64
6037 push(rscratch1); // save r10, trashed by movptr()
6038 #endif
6039 push(rax); // save rax,
6040 push(reg); // pass register argument
6041 ExternalAddress buffer((address) b);
6042 // avoid using pushptr, as it modifies scratch registers
6043 // and our contract is not to modify anything
6044 movptr(rax, buffer.addr());
6045 push(rax);
6046 // call indirectly to solve generation ordering problem
6047 movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address()));
6048 call(rax);
6049 // Caller pops the arguments (oop, message) and restores rax, r10
6050 BLOCK_COMMENT("} verify_oop");
6051 }
6052
6053
6054 RegisterOrConstant MacroAssembler::delayed_value_impl(intptr_t* delayed_value_addr,
6055 Register tmp,
6056 int offset) {
6057 intptr_t value = *delayed_value_addr;
6058 if (value != 0)
6059 return RegisterOrConstant(value + offset);
6060
6061 // load indirectly to solve generation ordering problem
6062 movptr(tmp, ExternalAddress((address) delayed_value_addr));
6063
6064 #ifdef ASSERT
6065 { Label L;
6066 testptr(tmp, tmp);
6067 if (WizardMode) {
6068 const char* buf = NULL;
6069 {
6070 ResourceMark rm;
6071 stringStream ss;
6072 ss.print("DelayedValue=" INTPTR_FORMAT, delayed_value_addr[1]);
6073 buf = code_string(ss.as_string());
6074 }
6075 jcc(Assembler::notZero, L);
6076 STOP(buf);
6077 } else {
6078 jccb(Assembler::notZero, L);
6079 hlt();
6080 }
6081 bind(L);
6082 }
6083 #endif
6084
6085 if (offset != 0)
6086 addptr(tmp, offset);
6087
6088 return RegisterOrConstant(tmp);
6089 }
6090
6091
6092 Address MacroAssembler::argument_address(RegisterOrConstant arg_slot,
6093 int extra_slot_offset) {
6094 // cf. TemplateTable::prepare_invoke(), if (load_receiver).
6095 int stackElementSize = Interpreter::stackElementSize;
6096 int offset = Interpreter::expr_offset_in_bytes(extra_slot_offset+0);
6097 #ifdef ASSERT
6098 int offset1 = Interpreter::expr_offset_in_bytes(extra_slot_offset+1);
6099 assert(offset1 - offset == stackElementSize, "correct arithmetic");
6100 #endif
6101 Register scale_reg = noreg;
6102 Address::ScaleFactor scale_factor = Address::no_scale;
6103 if (arg_slot.is_constant()) {
6104 offset += arg_slot.as_constant() * stackElementSize;
6105 } else {
6106 scale_reg = arg_slot.as_register();
6107 scale_factor = Address::times(stackElementSize);
6108 }
6109 offset += wordSize; // return PC is on stack
6110 return Address(rsp, scale_reg, scale_factor, offset);
6111 }
6112
6113
6114 void MacroAssembler::verify_oop_addr(Address addr, const char* s) {
6115 if (!VerifyOops) return;
6116
6117 // Address adjust(addr.base(), addr.index(), addr.scale(), addr.disp() + BytesPerWord);
6118 // Pass register number to verify_oop_subroutine
6119 const char* b = NULL;
6120 {
6121 ResourceMark rm;
6122 stringStream ss;
6123 ss.print("verify_oop_addr: %s", s);
6124 b = code_string(ss.as_string());
6125 }
6126 #ifdef _LP64
6127 push(rscratch1); // save r10, trashed by movptr()
6128 #endif
6129 push(rax); // save rax,
6130 // addr may contain rsp so we will have to adjust it based on the push
6131 // we just did (and on 64 bit we do two pushes)
6132 // NOTE: 64bit seemed to have had a bug in that it did movq(addr, rax); which
6133 // stores rax into addr which is backwards of what was intended.
6134 if (addr.uses(rsp)) {
6135 lea(rax, addr);
6136 pushptr(Address(rax, LP64_ONLY(2 *) BytesPerWord));
6137 } else {
6138 pushptr(addr);
6139 }
6140
6141 ExternalAddress buffer((address) b);
6142 // pass msg argument
6143 // avoid using pushptr, as it modifies scratch registers
6144 // and our contract is not to modify anything
6145 movptr(rax, buffer.addr());
6146 push(rax);
6147
6148 // call indirectly to solve generation ordering problem
6149 movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address()));
6150 call(rax);
6151 // Caller pops the arguments (addr, message) and restores rax, r10.
6152 }
6153
6154 void MacroAssembler::verify_tlab() {
6155 #ifdef ASSERT
6156 if (UseTLAB && VerifyOops) {
6157 Label next, ok;
6158 Register t1 = rsi;
6159 Register thread_reg = NOT_LP64(rbx) LP64_ONLY(r15_thread);
6160
6161 push(t1);
6162 NOT_LP64(push(thread_reg));
6163 NOT_LP64(get_thread(thread_reg));
6164
6165 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset())));
6166 cmpptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_start_offset())));
6167 jcc(Assembler::aboveEqual, next);
6168 STOP("assert(top >= start)");
6169 should_not_reach_here();
6170
6171 bind(next);
6172 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_end_offset())));
6173 cmpptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset())));
6174 jcc(Assembler::aboveEqual, ok);
6175 STOP("assert(top <= end)");
6176 should_not_reach_here();
6177
6178 bind(ok);
6179 NOT_LP64(pop(thread_reg));
6180 pop(t1);
6181 }
6182 #endif
6183 }
6184
6185 class ControlWord {
6186 public:
6187 int32_t _value;
6188
6189 int rounding_control() const { return (_value >> 10) & 3 ; }
6190 int precision_control() const { return (_value >> 8) & 3 ; }
6191 bool precision() const { return ((_value >> 5) & 1) != 0; }
6192 bool underflow() const { return ((_value >> 4) & 1) != 0; }
6193 bool overflow() const { return ((_value >> 3) & 1) != 0; }
6194 bool zero_divide() const { return ((_value >> 2) & 1) != 0; }
6195 bool denormalized() const { return ((_value >> 1) & 1) != 0; }
6196 bool invalid() const { return ((_value >> 0) & 1) != 0; }
6197
6198 void print() const {
6199 // rounding control
6200 const char* rc;
6201 switch (rounding_control()) {
6202 case 0: rc = "round near"; break;
6203 case 1: rc = "round down"; break;
6204 case 2: rc = "round up "; break;
6205 case 3: rc = "chop "; break;
6206 };
6207 // precision control
6208 const char* pc;
6209 switch (precision_control()) {
6210 case 0: pc = "24 bits "; break;
6211 case 1: pc = "reserved"; break;
6212 case 2: pc = "53 bits "; break;
6213 case 3: pc = "64 bits "; break;
6214 };
6215 // flags
6216 char f[9];
6217 f[0] = ' ';
6218 f[1] = ' ';
6219 f[2] = (precision ()) ? 'P' : 'p';
6220 f[3] = (underflow ()) ? 'U' : 'u';
6221 f[4] = (overflow ()) ? 'O' : 'o';
6222 f[5] = (zero_divide ()) ? 'Z' : 'z';
6223 f[6] = (denormalized()) ? 'D' : 'd';
6224 f[7] = (invalid ()) ? 'I' : 'i';
6225 f[8] = '\x0';
6226 // output
6227 printf("%04x masks = %s, %s, %s", _value & 0xFFFF, f, rc, pc);
6228 }
6229
6230 };
6231
6232 class StatusWord {
6233 public:
6234 int32_t _value;
6235
6236 bool busy() const { return ((_value >> 15) & 1) != 0; }
6237 bool C3() const { return ((_value >> 14) & 1) != 0; }
6238 bool C2() const { return ((_value >> 10) & 1) != 0; }
6239 bool C1() const { return ((_value >> 9) & 1) != 0; }
6240 bool C0() const { return ((_value >> 8) & 1) != 0; }
6241 int top() const { return (_value >> 11) & 7 ; }
6242 bool error_status() const { return ((_value >> 7) & 1) != 0; }
6243 bool stack_fault() const { return ((_value >> 6) & 1) != 0; }
6244 bool precision() const { return ((_value >> 5) & 1) != 0; }
6245 bool underflow() const { return ((_value >> 4) & 1) != 0; }
6246 bool overflow() const { return ((_value >> 3) & 1) != 0; }
6247 bool zero_divide() const { return ((_value >> 2) & 1) != 0; }
6248 bool denormalized() const { return ((_value >> 1) & 1) != 0; }
6249 bool invalid() const { return ((_value >> 0) & 1) != 0; }
6250
6251 void print() const {
6252 // condition codes
6253 char c[5];
6254 c[0] = (C3()) ? '3' : '-';
6255 c[1] = (C2()) ? '2' : '-';
6256 c[2] = (C1()) ? '1' : '-';
6257 c[3] = (C0()) ? '0' : '-';
6258 c[4] = '\x0';
6259 // flags
6260 char f[9];
6261 f[0] = (error_status()) ? 'E' : '-';
6262 f[1] = (stack_fault ()) ? 'S' : '-';
6263 f[2] = (precision ()) ? 'P' : '-';
6264 f[3] = (underflow ()) ? 'U' : '-';
6265 f[4] = (overflow ()) ? 'O' : '-';
6266 f[5] = (zero_divide ()) ? 'Z' : '-';
6267 f[6] = (denormalized()) ? 'D' : '-';
6268 f[7] = (invalid ()) ? 'I' : '-';
6269 f[8] = '\x0';
6270 // output
6271 printf("%04x flags = %s, cc = %s, top = %d", _value & 0xFFFF, f, c, top());
6272 }
6273
6274 };
6275
6276 class TagWord {
6277 public:
6278 int32_t _value;
6279
6280 int tag_at(int i) const { return (_value >> (i*2)) & 3; }
6281
6282 void print() const {
6283 printf("%04x", _value & 0xFFFF);
6284 }
6285
6286 };
6287
6288 class FPU_Register {
6289 public:
6290 int32_t _m0;
6291 int32_t _m1;
6292 int16_t _ex;
6293
6294 bool is_indefinite() const {
6295 return _ex == -1 && _m1 == (int32_t)0xC0000000 && _m0 == 0;
6296 }
6297
6298 void print() const {
6299 char sign = (_ex < 0) ? '-' : '+';
6300 const char* kind = (_ex == 0x7FFF || _ex == (int16_t)-1) ? "NaN" : " ";
6301 printf("%c%04hx.%08x%08x %s", sign, _ex, _m1, _m0, kind);
6302 };
6303
6304 };
6305
6306 class FPU_State {
6307 public:
6308 enum {
6309 register_size = 10,
6310 number_of_registers = 8,
6311 register_mask = 7
6312 };
6313
6314 ControlWord _control_word;
6315 StatusWord _status_word;
6316 TagWord _tag_word;
6317 int32_t _error_offset;
6318 int32_t _error_selector;
6319 int32_t _data_offset;
6320 int32_t _data_selector;
6321 int8_t _register[register_size * number_of_registers];
6322
6323 int tag_for_st(int i) const { return _tag_word.tag_at((_status_word.top() + i) & register_mask); }
6324 FPU_Register* st(int i) const { return (FPU_Register*)&_register[register_size * i]; }
6325
6326 const char* tag_as_string(int tag) const {
6327 switch (tag) {
6328 case 0: return "valid";
6329 case 1: return "zero";
6330 case 2: return "special";
6331 case 3: return "empty";
6332 }
6333 ShouldNotReachHere();
6334 return NULL;
6335 }
6336
6337 void print() const {
6338 // print computation registers
6339 { int t = _status_word.top();
6340 for (int i = 0; i < number_of_registers; i++) {
6341 int j = (i - t) & register_mask;
6342 printf("%c r%d = ST%d = ", (j == 0 ? '*' : ' '), i, j);
6343 st(j)->print();
6344 printf(" %s\n", tag_as_string(_tag_word.tag_at(i)));
6345 }
6346 }
6347 printf("\n");
6348 // print control registers
6349 printf("ctrl = "); _control_word.print(); printf("\n");
6350 printf("stat = "); _status_word .print(); printf("\n");
6351 printf("tags = "); _tag_word .print(); printf("\n");
6352 }
6353
6354 };
6355
6356 class Flag_Register {
6357 public:
6358 int32_t _value;
6359
6360 bool overflow() const { return ((_value >> 11) & 1) != 0; }
6361 bool direction() const { return ((_value >> 10) & 1) != 0; }
6362 bool sign() const { return ((_value >> 7) & 1) != 0; }
6363 bool zero() const { return ((_value >> 6) & 1) != 0; }
6364 bool auxiliary_carry() const { return ((_value >> 4) & 1) != 0; }
6365 bool parity() const { return ((_value >> 2) & 1) != 0; }
6366 bool carry() const { return ((_value >> 0) & 1) != 0; }
6367
6368 void print() const {
6369 // flags
6370 char f[8];
6371 f[0] = (overflow ()) ? 'O' : '-';
6372 f[1] = (direction ()) ? 'D' : '-';
6373 f[2] = (sign ()) ? 'S' : '-';
6374 f[3] = (zero ()) ? 'Z' : '-';
6375 f[4] = (auxiliary_carry()) ? 'A' : '-';
6376 f[5] = (parity ()) ? 'P' : '-';
6377 f[6] = (carry ()) ? 'C' : '-';
6378 f[7] = '\x0';
6379 // output
6380 printf("%08x flags = %s", _value, f);
6381 }
6382
6383 };
6384
6385 class IU_Register {
6386 public:
6387 int32_t _value;
6388
6389 void print() const {
6390 printf("%08x %11d", _value, _value);
6391 }
6392
6393 };
6394
6395 class IU_State {
6396 public:
6397 Flag_Register _eflags;
6398 IU_Register _rdi;
6399 IU_Register _rsi;
6400 IU_Register _rbp;
6401 IU_Register _rsp;
6402 IU_Register _rbx;
6403 IU_Register _rdx;
6404 IU_Register _rcx;
6405 IU_Register _rax;
6406
6407 void print() const {
6408 // computation registers
6409 printf("rax, = "); _rax.print(); printf("\n");
6410 printf("rbx, = "); _rbx.print(); printf("\n");
6411 printf("rcx = "); _rcx.print(); printf("\n");
6412 printf("rdx = "); _rdx.print(); printf("\n");
6413 printf("rdi = "); _rdi.print(); printf("\n");
6414 printf("rsi = "); _rsi.print(); printf("\n");
6415 printf("rbp, = "); _rbp.print(); printf("\n");
6416 printf("rsp = "); _rsp.print(); printf("\n");
6417 printf("\n");
6418 // control registers
6419 printf("flgs = "); _eflags.print(); printf("\n");
6420 }
6421 };
6422
6423
6424 class CPU_State {
6425 public:
6426 FPU_State _fpu_state;
6427 IU_State _iu_state;
6428
6429 void print() const {
6430 printf("--------------------------------------------------\n");
6431 _iu_state .print();
6432 printf("\n");
6433 _fpu_state.print();
6434 printf("--------------------------------------------------\n");
6435 }
6436
6437 };
6438
6439
6440 static void _print_CPU_state(CPU_State* state) {
6441 state->print();
6442 };
6443
6444
6445 void MacroAssembler::print_CPU_state() {
6446 push_CPU_state();
6447 push(rsp); // pass CPU state
6448 call(RuntimeAddress(CAST_FROM_FN_PTR(address, _print_CPU_state)));
6449 addptr(rsp, wordSize); // discard argument
6450 pop_CPU_state();
6451 }
6452
6453
6454 static bool _verify_FPU(int stack_depth, char* s, CPU_State* state) {
6455 static int counter = 0;
6456 FPU_State* fs = &state->_fpu_state;
6457 counter++;
6458 // For leaf calls, only verify that the top few elements remain empty.
6459 // We only need 1 empty at the top for C2 code.
6460 if( stack_depth < 0 ) {
6461 if( fs->tag_for_st(7) != 3 ) {
6462 printf("FPR7 not empty\n");
6463 state->print();
6464 assert(false, "error");
6465 return false;
6466 }
6467 return true; // All other stack states do not matter
6468 }
6469
6470 assert((fs->_control_word._value & 0xffff) == StubRoutines::_fpu_cntrl_wrd_std,
6471 "bad FPU control word");
6472
6473 // compute stack depth
6474 int i = 0;
6475 while (i < FPU_State::number_of_registers && fs->tag_for_st(i) < 3) i++;
6476 int d = i;
6477 while (i < FPU_State::number_of_registers && fs->tag_for_st(i) == 3) i++;
6478 // verify findings
6479 if (i != FPU_State::number_of_registers) {
6480 // stack not contiguous
6481 printf("%s: stack not contiguous at ST%d\n", s, i);
6482 state->print();
6483 assert(false, "error");
6484 return false;
6485 }
6486 // check if computed stack depth corresponds to expected stack depth
6487 if (stack_depth < 0) {
6488 // expected stack depth is -stack_depth or less
6489 if (d > -stack_depth) {
6490 // too many elements on the stack
6491 printf("%s: <= %d stack elements expected but found %d\n", s, -stack_depth, d);
6492 state->print();
6493 assert(false, "error");
6494 return false;
6495 }
6496 } else {
6497 // expected stack depth is stack_depth
6498 if (d != stack_depth) {
6499 // wrong stack depth
6500 printf("%s: %d stack elements expected but found %d\n", s, stack_depth, d);
6501 state->print();
6502 assert(false, "error");
6503 return false;
6504 }
6505 }
6506 // everything is cool
6507 return true;
6508 }
6509
6510
6511 void MacroAssembler::verify_FPU(int stack_depth, const char* s) {
6512 if (!VerifyFPU) return;
6513 push_CPU_state();
6514 push(rsp); // pass CPU state
6515 ExternalAddress msg((address) s);
6516 // pass message string s
6517 pushptr(msg.addr());
6518 push(stack_depth); // pass stack depth
6519 call(RuntimeAddress(CAST_FROM_FN_PTR(address, _verify_FPU)));
6520 addptr(rsp, 3 * wordSize); // discard arguments
6521 // check for error
6522 { Label L;
6523 testl(rax, rax);
6524 jcc(Assembler::notZero, L);
6525 int3(); // break if error condition
6526 bind(L);
6527 }
6528 pop_CPU_state();
6529 }
6530
6531 void MacroAssembler::restore_cpu_control_state_after_jni() {
6532 // Either restore the MXCSR register after returning from the JNI Call
6533 // or verify that it wasn't changed (with -Xcheck:jni flag).
6534 if (VM_Version::supports_sse()) {
6535 if (RestoreMXCSROnJNICalls) {
6536 ldmxcsr(ExternalAddress(StubRoutines::addr_mxcsr_std()));
6537 } else if (CheckJNICalls) {
6538 call(RuntimeAddress(StubRoutines::x86::verify_mxcsr_entry()));
6539 }
6540 }
6541 // Clear upper bits of YMM registers to avoid SSE <-> AVX transition penalty.
6542 vzeroupper();
6543 // Reset k1 to 0xffff.
6544 if (VM_Version::supports_evex()) {
6545 push(rcx);
6546 movl(rcx, 0xffff);
6547 kmovwl(k1, rcx);
6548 pop(rcx);
6549 }
6550
6551 #ifndef _LP64
6552 // Either restore the x87 floating pointer control word after returning
6553 // from the JNI call or verify that it wasn't changed.
6554 if (CheckJNICalls) {
6555 call(RuntimeAddress(StubRoutines::x86::verify_fpu_cntrl_wrd_entry()));
6556 }
6557 #endif // _LP64
6558 }
6559
6560 // ((OopHandle)result).resolve();
6561 void MacroAssembler::resolve_oop_handle(Register result) {
6562 // OopHandle::resolve is an indirection.
6563 movptr(result, Address(result, 0));
6564 }
6565
6566 void MacroAssembler::load_mirror(Register mirror, Register method) {
6567 // get mirror
6568 const int mirror_offset = in_bytes(Klass::java_mirror_offset());
6569 movptr(mirror, Address(method, Method::const_offset()));
6570 movptr(mirror, Address(mirror, ConstMethod::constants_offset()));
6571 movptr(mirror, Address(mirror, ConstantPool::pool_holder_offset_in_bytes()));
6572 movptr(mirror, Address(mirror, mirror_offset));
6573 resolve_oop_handle(mirror);
6574 }
6575
6576 void MacroAssembler::load_klass(Register dst, Register src) {
6577 #ifdef _LP64
6578 if (UseCompressedClassPointers) {
6579 movl(dst, Address(src, oopDesc::klass_offset_in_bytes()));
6580 decode_klass_not_null(dst);
6581 } else
6582 #endif
6583 movptr(dst, Address(src, oopDesc::klass_offset_in_bytes()));
6584 }
6585
6586 void MacroAssembler::load_prototype_header(Register dst, Register src) {
6587 load_klass(dst, src);
6588 movptr(dst, Address(dst, Klass::prototype_header_offset()));
6589 }
6590
6591 void MacroAssembler::store_klass(Register dst, Register src) {
6592 #ifdef _LP64
6593 if (UseCompressedClassPointers) {
6594 encode_klass_not_null(src);
6595 movl(Address(dst, oopDesc::klass_offset_in_bytes()), src);
6596 } else
6597 #endif
6598 movptr(Address(dst, oopDesc::klass_offset_in_bytes()), src);
6599 }
6600
6601 #if INCLUDE_ALL_GCS && defined(_LP64)
6602
6603 void MacroAssembler::load_barrier(Register ref, Address ref_addr, bool expand_call, LoadBarrierOn on) {
6604 Label done;
6605 const Register resolved_ref_addr = rsi;
6606 assert_different_registers(ref, resolved_ref_addr);
6607
6608 BLOCK_COMMENT("load_barrier {");
6609
6610 // Save temp register
6611 push(resolved_ref_addr);
6612
6613 // Resolve reference address now, ref_addr might use the same register as ref,
6614 // which means it gets killed when we write to ref.
6615 lea(resolved_ref_addr, ref_addr);
6616
6617 // Load reference
6618 movptr(ref, Address(resolved_ref_addr, 0));
6619
6620 // Check if mask is not bad, which includes an implicit null check.
6621 testptr(ref, Address(r15_thread, JavaThread::zaddress_bad_mask_offset()));
6622 jcc(Assembler::zero, done);
6623
6624 // Save live registers
6625 push(rax);
6626 push(rcx);
6627 push(rdx);
6628 push(rdi);
6629 push(r8);
6630 push(r9);
6631 push(r10);
6632 push(r11);
6633
6634 // We may end up here from generate_native_wrapper, then the method may have
6635 // floats as arguments, and we must spill them before calling the VM runtime
6636 // leaf. From the interpreter all floats are passed on the stack.
6637 assert(Argument::n_float_register_parameters_j == 8, "Found %d float regs", Argument::n_float_register_parameters_j);
6638 int f_spill_size = Argument::n_float_register_parameters_j * wordSize * 2;
6639 subptr(rsp, f_spill_size);
6640 movdqu(Address(rsp, 14 * wordSize), xmm7);
6641 movdqu(Address(rsp, 12 * wordSize), xmm6);
6642 movdqu(Address(rsp, 10 * wordSize), xmm5);
6643 movdqu(Address(rsp, 8 * wordSize), xmm4);
6644 movdqu(Address(rsp, 6 * wordSize), xmm3);
6645 movdqu(Address(rsp, 4 * wordSize), xmm2);
6646 movdqu(Address(rsp, 2 * wordSize), xmm1);
6647 movdqu(Address(rsp, 0 * wordSize), xmm0);
6648
6649 // Call into VM to handle the slow path
6650 if (expand_call) {
6651 assert(ref != c_rarg1, "smashed arg");
6652 pass_arg1(this, resolved_ref_addr);
6653 pass_arg0(this, ref);
6654 switch (on) {
6655 case LoadBarrierOnStrongOopRef:
6656 MacroAssembler::call_VM_leaf_base(CAST_FROM_FN_PTR(address, SharedRuntime::z_load_barrier_on_oop_field_preloaded), 2);
6657 break;
6658 case LoadBarrierOnWeakOopRef:
6659 MacroAssembler::call_VM_leaf_base(CAST_FROM_FN_PTR(address, SharedRuntime::z_load_barrier_on_weak_oop_field_preloaded), 2);
6660 break;
6661 case LoadBarrierOnPhantomOopRef:
6662 MacroAssembler::call_VM_leaf_base(CAST_FROM_FN_PTR(address, SharedRuntime::z_load_barrier_on_phantom_oop_field_preloaded), 2);
6663 break;
6664 default:
6665 fatal("Unknown strength: %d", on);
6666 break;
6667 }
6668 } else {
6669 switch (on) {
6670 case LoadBarrierOnStrongOopRef:
6671 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::z_load_barrier_on_oop_field_preloaded), ref, resolved_ref_addr);
6672 break;
6673 case LoadBarrierOnWeakOopRef:
6674 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::z_load_barrier_on_weak_oop_field_preloaded), ref, resolved_ref_addr);
6675 break;
6676 case LoadBarrierOnPhantomOopRef:
6677 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::z_load_barrier_on_phantom_oop_field_preloaded), ref, resolved_ref_addr);
6678 break;
6679 default: fatal("Unknown strength: %d", on);
6680 break;
6681 }
6682 }
6683
6684 // Restore live registers
6685 movdqu(xmm0, Address(rsp, 0 * wordSize));
6686 movdqu(xmm1, Address(rsp, 2 * wordSize));
6687 movdqu(xmm2, Address(rsp, 4 * wordSize));
6688 movdqu(xmm3, Address(rsp, 6 * wordSize));
6689 movdqu(xmm4, Address(rsp, 8 * wordSize));
6690 movdqu(xmm5, Address(rsp, 10 * wordSize));
6691 movdqu(xmm6, Address(rsp, 12 * wordSize));
6692 movdqu(xmm7, Address(rsp, 14 * wordSize));
6693 addptr(rsp, f_spill_size);
6694
6695 pop(r11);
6696 pop(r10);
6697 pop(r9);
6698 pop(r8);
6699 pop(rdi);
6700 pop(rdx);
6701 pop(rcx);
6702
6703 if (ref == rax) {
6704 addptr(rsp, wordSize);
6705 } else {
6706 movptr(ref, rax);
6707 pop(rax);
6708 }
6709
6710 bind(done);
6711
6712 // Restore temp register
6713 pop(resolved_ref_addr);
6714
6715 BLOCK_COMMENT("} load_barrier");
6716 }
6717
6718 #endif
6719
6720 void MacroAssembler::load_heap_oop(Register dst, Address src, bool expand_call, LoadBarrierOn on) {
6721 #ifdef _LP64
6722 #if INCLUDE_ALL_GCS
6723 if (UseLoadBarrier) {
6724 load_barrier(dst, src, expand_call, on);
6725 } else
6726 #endif
6727 if (UseCompressedOops) {
6728 movl(dst, src);
6729 decode_heap_oop(dst);
6730 } else
6731 #endif
6732 movptr(dst, src);
6733 }
6734
6735 // Doesn't do verfication, generates fixed size code
6736 void MacroAssembler::load_heap_oop_not_null(Register dst, Address src) {
6737 #ifdef _LP64
6738 if (UseCompressedOops) {
6739 movl(dst, src);
6740 decode_heap_oop_not_null(dst);
6741 } else
6742 #endif
6743 movptr(dst, src);
6744 }
6745
6746 void MacroAssembler::store_heap_oop(Address dst, Register src) {
6747 #ifdef ASSERT
6748 if (VerifyOops && UseLoadBarrier) {
6749 // Check if mask is good
6750 Label done;
6751 testptr(src, Address(r15_thread, JavaThread::zaddress_bad_mask_offset()));
6752 jcc(Assembler::zero, done);
6753 STOP("Writing broken oop");
6754 should_not_reach_here();
6755 bind(done);
6756 }
6757 #endif
6758
6759 #ifdef _LP64
6760 if (UseCompressedOops) {
6761 assert(!dst.uses(src), "not enough registers");
6762 encode_heap_oop(src);
6763 movl(dst, src);
6764 } else
6765 #endif
6766 movptr(dst, src);
6767 }
6768
6769 void MacroAssembler::cmp_heap_oop(Register src1, Address src2, Register tmp) {
6770 assert_different_registers(src1, tmp);
6771 #ifdef _LP64
6772 if (UseCompressedOops) {
6773 bool did_push = false;
6774 if (tmp == noreg) {
6775 tmp = rax;
6776 push(tmp);
6777 did_push = true;
6778 assert(!src2.uses(rsp), "can't push");
6779 }
6780 load_heap_oop(tmp, src2);
6781 cmpptr(src1, tmp);
6782 if (did_push) pop(tmp);
6783 } else
6784 #endif
6785 cmpptr(src1, src2);
6786 }
6787
6788 // Used for storing NULLs.
6789 void MacroAssembler::store_heap_oop_null(Address dst) {
6790 #ifdef _LP64
6791 if (UseCompressedOops) {
6792 movl(dst, (int32_t)NULL_WORD);
6793 } else {
6794 movslq(dst, (int32_t)NULL_WORD);
6795 }
6796 #else
6797 movl(dst, (int32_t)NULL_WORD);
6798 #endif
6799 }
6800
6801 #ifdef _LP64
6802 void MacroAssembler::store_klass_gap(Register dst, Register src) {
6803 if (UseCompressedClassPointers) {
6804 // Store to klass gap in destination
6805 movl(Address(dst, oopDesc::klass_gap_offset_in_bytes()), src);
6806 }
6807 }
6808
6809 #ifdef ASSERT
6810 void MacroAssembler::verify_heapbase(const char* msg) {
6811 assert (UseCompressedOops, "should be compressed");
6812 assert (Universe::heap() != NULL, "java heap should be initialized");
6813 if (CheckCompressedOops) {
6814 Label ok;
6815 push(rscratch1); // cmpptr trashes rscratch1
6816 cmpptr(r12_heapbase, ExternalAddress((address)Universe::narrow_ptrs_base_addr()));
6817 jcc(Assembler::equal, ok);
6818 STOP(msg);
6819 bind(ok);
6820 pop(rscratch1);
6821 }
6822 }
6823 #endif
6824
6825 // Algorithm must match oop.inline.hpp encode_heap_oop.
6826 void MacroAssembler::encode_heap_oop(Register r) {
6827 #ifdef ASSERT
6828 verify_heapbase("MacroAssembler::encode_heap_oop: heap base corrupted?");
6829 #endif
6830 verify_oop(r, "broken oop in encode_heap_oop");
6831 if (Universe::narrow_oop_base() == NULL) {
6832 if (Universe::narrow_oop_shift() != 0) {
6833 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong");
6834 shrq(r, LogMinObjAlignmentInBytes);
6835 }
6836 return;
6837 }
6838 testq(r, r);
6839 cmovq(Assembler::equal, r, r12_heapbase);
6840 subq(r, r12_heapbase);
6841 shrq(r, LogMinObjAlignmentInBytes);
6842 }
6843
6844 void MacroAssembler::encode_heap_oop_not_null(Register r) {
6845 #ifdef ASSERT
6846 verify_heapbase("MacroAssembler::encode_heap_oop_not_null: heap base corrupted?");
6847 if (CheckCompressedOops) {
6848 Label ok;
6849 testq(r, r);
6850 jcc(Assembler::notEqual, ok);
6851 STOP("null oop passed to encode_heap_oop_not_null");
6852 bind(ok);
6853 }
6854 #endif
6855 verify_oop(r, "broken oop in encode_heap_oop_not_null");
6856 if (Universe::narrow_oop_base() != NULL) {
6857 subq(r, r12_heapbase);
6858 }
6859 if (Universe::narrow_oop_shift() != 0) {
6860 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong");
6861 shrq(r, LogMinObjAlignmentInBytes);
6862 }
6863 }
6864
6865 void MacroAssembler::encode_heap_oop_not_null(Register dst, Register src) {
6866 #ifdef ASSERT
6867 verify_heapbase("MacroAssembler::encode_heap_oop_not_null2: heap base corrupted?");
6868 if (CheckCompressedOops) {
6869 Label ok;
6870 testq(src, src);
6871 jcc(Assembler::notEqual, ok);
6872 STOP("null oop passed to encode_heap_oop_not_null2");
6873 bind(ok);
6874 }
6875 #endif
6876 verify_oop(src, "broken oop in encode_heap_oop_not_null2");
6877 if (dst != src) {
6878 movq(dst, src);
6879 }
6880 if (Universe::narrow_oop_base() != NULL) {
6881 subq(dst, r12_heapbase);
6882 }
6883 if (Universe::narrow_oop_shift() != 0) {
6884 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong");
6885 shrq(dst, LogMinObjAlignmentInBytes);
6886 }
6887 }
6888
6889 void MacroAssembler::decode_heap_oop(Register r) {
6890 #ifdef ASSERT
6891 verify_heapbase("MacroAssembler::decode_heap_oop: heap base corrupted?");
6892 #endif
6893 if (Universe::narrow_oop_base() == NULL) {
6894 if (Universe::narrow_oop_shift() != 0) {
6895 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong");
6896 shlq(r, LogMinObjAlignmentInBytes);
6897 }
6898 } else {
6899 Label done;
6900 shlq(r, LogMinObjAlignmentInBytes);
6901 jccb(Assembler::equal, done);
6902 addq(r, r12_heapbase);
6903 bind(done);
6904 }
6905 verify_oop(r, "broken oop in decode_heap_oop");
6906 }
6907
6908 void MacroAssembler::decode_heap_oop_not_null(Register r) {
6909 // Note: it will change flags
6910 assert (UseCompressedOops, "should only be used for compressed headers");
6911 assert (Universe::heap() != NULL, "java heap should be initialized");
6912 // Cannot assert, unverified entry point counts instructions (see .ad file)
6913 // vtableStubs also counts instructions in pd_code_size_limit.
6914 // Also do not verify_oop as this is called by verify_oop.
6915 if (Universe::narrow_oop_shift() != 0) {
6916 assert(LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong");
6917 shlq(r, LogMinObjAlignmentInBytes);
6918 if (Universe::narrow_oop_base() != NULL) {
6919 addq(r, r12_heapbase);
6920 }
6921 } else {
6922 assert (Universe::narrow_oop_base() == NULL, "sanity");
6923 }
6924 }
6925
6926 void MacroAssembler::decode_heap_oop_not_null(Register dst, Register src) {
6927 // Note: it will change flags
6928 assert (UseCompressedOops, "should only be used for compressed headers");
6929 assert (Universe::heap() != NULL, "java heap should be initialized");
6930 // Cannot assert, unverified entry point counts instructions (see .ad file)
6931 // vtableStubs also counts instructions in pd_code_size_limit.
6932 // Also do not verify_oop as this is called by verify_oop.
6933 if (Universe::narrow_oop_shift() != 0) {
6934 assert(LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong");
6935 if (LogMinObjAlignmentInBytes == Address::times_8) {
6936 leaq(dst, Address(r12_heapbase, src, Address::times_8, 0));
6937 } else {
6938 if (dst != src) {
6939 movq(dst, src);
6940 }
6941 shlq(dst, LogMinObjAlignmentInBytes);
6942 if (Universe::narrow_oop_base() != NULL) {
6943 addq(dst, r12_heapbase);
6944 }
6945 }
6946 } else {
6947 assert (Universe::narrow_oop_base() == NULL, "sanity");
6948 if (dst != src) {
6949 movq(dst, src);
6950 }
6951 }
6952 }
6953
6954 void MacroAssembler::encode_klass_not_null(Register r) {
6955 if (Universe::narrow_klass_base() != NULL) {
6956 // Use r12 as a scratch register in which to temporarily load the narrow_klass_base.
6957 assert(r != r12_heapbase, "Encoding a klass in r12");
6958 mov64(r12_heapbase, (int64_t)Universe::narrow_klass_base());
6959 subq(r, r12_heapbase);
6960 }
6961 if (Universe::narrow_klass_shift() != 0) {
6962 assert (LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong");
6963 shrq(r, LogKlassAlignmentInBytes);
6964 }
6965 if (Universe::narrow_klass_base() != NULL) {
6966 reinit_heapbase();
6967 }
6968 }
6969
6970 void MacroAssembler::encode_klass_not_null(Register dst, Register src) {
6971 if (dst == src) {
6972 encode_klass_not_null(src);
6973 } else {
6974 if (Universe::narrow_klass_base() != NULL) {
6975 mov64(dst, (int64_t)Universe::narrow_klass_base());
6976 negq(dst);
6977 addq(dst, src);
6978 } else {
6979 movptr(dst, src);
6980 }
6981 if (Universe::narrow_klass_shift() != 0) {
6982 assert (LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong");
6983 shrq(dst, LogKlassAlignmentInBytes);
6984 }
6985 }
6986 }
6987
6988 // Function instr_size_for_decode_klass_not_null() counts the instructions
6989 // generated by decode_klass_not_null(register r) and reinit_heapbase(),
6990 // when (Universe::heap() != NULL). Hence, if the instructions they
6991 // generate change, then this method needs to be updated.
6992 int MacroAssembler::instr_size_for_decode_klass_not_null() {
6993 assert (UseCompressedClassPointers, "only for compressed klass ptrs");
6994 if (Universe::narrow_klass_base() != NULL) {
6995 // mov64 + addq + shlq? + mov64 (for reinit_heapbase()).
6996 return (Universe::narrow_klass_shift() == 0 ? 20 : 24);
6997 } else {
6998 // longest load decode klass function, mov64, leaq
6999 return 16;
7000 }
7001 }
7002
7003 // !!! If the instructions that get generated here change then function
7004 // instr_size_for_decode_klass_not_null() needs to get updated.
7005 void MacroAssembler::decode_klass_not_null(Register r) {
7006 // Note: it will change flags
7007 assert (UseCompressedClassPointers, "should only be used for compressed headers");
7008 assert(r != r12_heapbase, "Decoding a klass in r12");
7009 // Cannot assert, unverified entry point counts instructions (see .ad file)
7010 // vtableStubs also counts instructions in pd_code_size_limit.
7011 // Also do not verify_oop as this is called by verify_oop.
7012 if (Universe::narrow_klass_shift() != 0) {
7013 assert(LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong");
7014 shlq(r, LogKlassAlignmentInBytes);
7015 }
7016 // Use r12 as a scratch register in which to temporarily load the narrow_klass_base.
7017 if (Universe::narrow_klass_base() != NULL) {
7018 mov64(r12_heapbase, (int64_t)Universe::narrow_klass_base());
7019 addq(r, r12_heapbase);
7020 reinit_heapbase();
7021 }
7022 }
7023
7024 void MacroAssembler::decode_klass_not_null(Register dst, Register src) {
7025 // Note: it will change flags
7026 assert (UseCompressedClassPointers, "should only be used for compressed headers");
7027 if (dst == src) {
7028 decode_klass_not_null(dst);
7029 } else {
7030 // Cannot assert, unverified entry point counts instructions (see .ad file)
7031 // vtableStubs also counts instructions in pd_code_size_limit.
7032 // Also do not verify_oop as this is called by verify_oop.
7033 mov64(dst, (int64_t)Universe::narrow_klass_base());
7034 if (Universe::narrow_klass_shift() != 0) {
7035 assert(LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong");
7036 assert(LogKlassAlignmentInBytes == Address::times_8, "klass not aligned on 64bits?");
7037 leaq(dst, Address(dst, src, Address::times_8, 0));
7038 } else {
7039 addq(dst, src);
7040 }
7041 }
7042 }
7043
7044 void MacroAssembler::set_narrow_oop(Register dst, jobject obj) {
7045 assert (UseCompressedOops, "should only be used for compressed headers");
7046 assert (Universe::heap() != NULL, "java heap should be initialized");
7047 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder");
7048 int oop_index = oop_recorder()->find_index(obj);
7049 RelocationHolder rspec = oop_Relocation::spec(oop_index);
7050 mov_narrow_oop(dst, oop_index, rspec);
7051 }
7052
7053 void MacroAssembler::set_narrow_oop(Address dst, jobject obj) {
7054 assert (UseCompressedOops, "should only be used for compressed headers");
7055 assert (Universe::heap() != NULL, "java heap should be initialized");
7056 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder");
7057 int oop_index = oop_recorder()->find_index(obj);
7058 RelocationHolder rspec = oop_Relocation::spec(oop_index);
7059 mov_narrow_oop(dst, oop_index, rspec);
7060 }
7061
7062 void MacroAssembler::set_narrow_klass(Register dst, Klass* k) {
7063 assert (UseCompressedClassPointers, "should only be used for compressed headers");
7064 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder");
7065 int klass_index = oop_recorder()->find_index(k);
7066 RelocationHolder rspec = metadata_Relocation::spec(klass_index);
7067 mov_narrow_oop(dst, Klass::encode_klass(k), rspec);
7068 }
7069
7070 void MacroAssembler::set_narrow_klass(Address dst, Klass* k) {
7071 assert (UseCompressedClassPointers, "should only be used for compressed headers");
7072 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder");
7073 int klass_index = oop_recorder()->find_index(k);
7074 RelocationHolder rspec = metadata_Relocation::spec(klass_index);
7075 mov_narrow_oop(dst, Klass::encode_klass(k), rspec);
7076 }
7077
7078 void MacroAssembler::cmp_narrow_oop(Register dst, jobject obj) {
7079 assert (UseCompressedOops, "should only be used for compressed headers");
7080 assert (Universe::heap() != NULL, "java heap should be initialized");
7081 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder");
7082 int oop_index = oop_recorder()->find_index(obj);
7083 RelocationHolder rspec = oop_Relocation::spec(oop_index);
7084 Assembler::cmp_narrow_oop(dst, oop_index, rspec);
7085 }
7086
7087 void MacroAssembler::cmp_narrow_oop(Address dst, jobject obj) {
7088 assert (UseCompressedOops, "should only be used for compressed headers");
7089 assert (Universe::heap() != NULL, "java heap should be initialized");
7090 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder");
7091 int oop_index = oop_recorder()->find_index(obj);
7092 RelocationHolder rspec = oop_Relocation::spec(oop_index);
7093 Assembler::cmp_narrow_oop(dst, oop_index, rspec);
7094 }
7095
7096 void MacroAssembler::cmp_narrow_klass(Register dst, Klass* k) {
7097 assert (UseCompressedClassPointers, "should only be used for compressed headers");
7098 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder");
7099 int klass_index = oop_recorder()->find_index(k);
7100 RelocationHolder rspec = metadata_Relocation::spec(klass_index);
7101 Assembler::cmp_narrow_oop(dst, Klass::encode_klass(k), rspec);
7102 }
7103
7104 void MacroAssembler::cmp_narrow_klass(Address dst, Klass* k) {
7105 assert (UseCompressedClassPointers, "should only be used for compressed headers");
7106 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder");
7107 int klass_index = oop_recorder()->find_index(k);
7108 RelocationHolder rspec = metadata_Relocation::spec(klass_index);
7109 Assembler::cmp_narrow_oop(dst, Klass::encode_klass(k), rspec);
7110 }
7111
7112 void MacroAssembler::reinit_heapbase() {
7113 if (UseCompressedOops || UseCompressedClassPointers) {
7114 if (Universe::heap() != NULL) {
7115 if (Universe::narrow_oop_base() == NULL) {
7116 MacroAssembler::xorptr(r12_heapbase, r12_heapbase);
7117 } else {
7118 mov64(r12_heapbase, (int64_t)Universe::narrow_ptrs_base());
7119 }
7120 } else {
7121 movptr(r12_heapbase, ExternalAddress((address)Universe::narrow_ptrs_base_addr()));
7122 }
7123 }
7124 }
7125
7126 #endif // _LP64
7127
7128 // C2 compiled method's prolog code.
7129 void MacroAssembler::verified_entry(int framesize, int stack_bang_size, bool fp_mode_24b) {
7130
7131 // WARNING: Initial instruction MUST be 5 bytes or longer so that
7132 // NativeJump::patch_verified_entry will be able to patch out the entry
7133 // code safely. The push to verify stack depth is ok at 5 bytes,
7134 // the frame allocation can be either 3 or 6 bytes. So if we don't do
7135 // stack bang then we must use the 6 byte frame allocation even if
7136 // we have no frame. :-(
7137 assert(stack_bang_size >= framesize || stack_bang_size <= 0, "stack bang size incorrect");
7138
7139 assert((framesize & (StackAlignmentInBytes-1)) == 0, "frame size not aligned");
7140 // Remove word for return addr
7141 framesize -= wordSize;
7142 stack_bang_size -= wordSize;
7143
7144 // Calls to C2R adapters often do not accept exceptional returns.
7145 // We require that their callers must bang for them. But be careful, because
7146 // some VM calls (such as call site linkage) can use several kilobytes of
7147 // stack. But the stack safety zone should account for that.
7148 // See bugs 4446381, 4468289, 4497237.
7149 if (stack_bang_size > 0) {
7150 generate_stack_overflow_check(stack_bang_size);
7151
7152 // We always push rbp, so that on return to interpreter rbp, will be
7153 // restored correctly and we can correct the stack.
7154 push(rbp);
7155 // Save caller's stack pointer into RBP if the frame pointer is preserved.
7156 if (PreserveFramePointer) {
7157 mov(rbp, rsp);
7158 }
7159 // Remove word for ebp
7160 framesize -= wordSize;
7161
7162 // Create frame
7163 if (framesize) {
7164 subptr(rsp, framesize);
7165 }
7166 } else {
7167 // Create frame (force generation of a 4 byte immediate value)
7168 subptr_imm32(rsp, framesize);
7169
7170 // Save RBP register now.
7171 framesize -= wordSize;
7172 movptr(Address(rsp, framesize), rbp);
7173 // Save caller's stack pointer into RBP if the frame pointer is preserved.
7174 if (PreserveFramePointer) {
7175 movptr(rbp, rsp);
7176 if (framesize > 0) {
7177 addptr(rbp, framesize);
7178 }
7179 }
7180 }
7181
7182 if (VerifyStackAtCalls) { // Majik cookie to verify stack depth
7183 framesize -= wordSize;
7184 movptr(Address(rsp, framesize), (int32_t)0xbadb100d);
7185 }
7186
7187 #ifndef _LP64
7188 // If method sets FPU control word do it now
7189 if (fp_mode_24b) {
7190 fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_24()));
7191 }
7192 if (UseSSE >= 2 && VerifyFPU) {
7193 verify_FPU(0, "FPU stack must be clean on entry");
7194 }
7195 #endif
7196
7197 #ifdef ASSERT
7198 if (VerifyStackAtCalls) {
7199 Label L;
7200 push(rax);
7201 mov(rax, rsp);
7202 andptr(rax, StackAlignmentInBytes-1);
7203 cmpptr(rax, StackAlignmentInBytes-wordSize);
7204 pop(rax);
7205 jcc(Assembler::equal, L);
7206 STOP("Stack is not properly aligned!");
7207 bind(L);
7208 }
7209 #endif
7210
7211 }
7212
7213 void MacroAssembler::clear_mem(Register base, Register cnt, Register tmp, bool is_large) {
7214 // cnt - number of qwords (8-byte words).
7215 // base - start address, qword aligned.
7216 // is_large - if optimizers know cnt is larger than InitArrayShortSize
7217 assert(base==rdi, "base register must be edi for rep stos");
7218 assert(tmp==rax, "tmp register must be eax for rep stos");
7219 assert(cnt==rcx, "cnt register must be ecx for rep stos");
7220 assert(InitArrayShortSize % BytesPerLong == 0,
7221 "InitArrayShortSize should be the multiple of BytesPerLong");
7222
7223 Label DONE;
7224
7225 xorptr(tmp, tmp);
7226
7227 if (!is_large) {
7228 Label LOOP, LONG;
7229 cmpptr(cnt, InitArrayShortSize/BytesPerLong);
7230 jccb(Assembler::greater, LONG);
7231
7232 NOT_LP64(shlptr(cnt, 1);) // convert to number of 32-bit words for 32-bit VM
7233
7234 decrement(cnt);
7235 jccb(Assembler::negative, DONE); // Zero length
7236
7237 // Use individual pointer-sized stores for small counts:
7238 BIND(LOOP);
7239 movptr(Address(base, cnt, Address::times_ptr), tmp);
7240 decrement(cnt);
7241 jccb(Assembler::greaterEqual, LOOP);
7242 jmpb(DONE);
7243
7244 BIND(LONG);
7245 }
7246
7247 // Use longer rep-prefixed ops for non-small counts:
7248 if (UseFastStosb) {
7249 shlptr(cnt, 3); // convert to number of bytes
7250 rep_stosb();
7251 } else {
7252 NOT_LP64(shlptr(cnt, 1);) // convert to number of 32-bit words for 32-bit VM
7253 rep_stos();
7254 }
7255
7256 BIND(DONE);
7257 }
7258
7259 #ifdef COMPILER2
7260
7261 // IndexOf for constant substrings with size >= 8 chars
7262 // which don't need to be loaded through stack.
7263 void MacroAssembler::string_indexofC8(Register str1, Register str2,
7264 Register cnt1, Register cnt2,
7265 int int_cnt2, Register result,
7266 XMMRegister vec, Register tmp,
7267 int ae) {
7268 ShortBranchVerifier sbv(this);
7269 assert(UseSSE42Intrinsics, "SSE4.2 intrinsics are required");
7270 assert(ae != StrIntrinsicNode::LU, "Invalid encoding");
7271
7272 // This method uses the pcmpestri instruction with bound registers
7273 // inputs:
7274 // xmm - substring
7275 // rax - substring length (elements count)
7276 // mem - scanned string
7277 // rdx - string length (elements count)
7278 // 0xd - mode: 1100 (substring search) + 01 (unsigned shorts)
7279 // 0xc - mode: 1100 (substring search) + 00 (unsigned bytes)
7280 // outputs:
7281 // rcx - matched index in string
7282 assert(cnt1 == rdx && cnt2 == rax && tmp == rcx, "pcmpestri");
7283 int mode = (ae == StrIntrinsicNode::LL) ? 0x0c : 0x0d; // bytes or shorts
7284 int stride = (ae == StrIntrinsicNode::LL) ? 16 : 8; //UU, UL -> 8
7285 Address::ScaleFactor scale1 = (ae == StrIntrinsicNode::LL) ? Address::times_1 : Address::times_2;
7286 Address::ScaleFactor scale2 = (ae == StrIntrinsicNode::UL) ? Address::times_1 : scale1;
7287
7288 Label RELOAD_SUBSTR, SCAN_TO_SUBSTR, SCAN_SUBSTR,
7289 RET_FOUND, RET_NOT_FOUND, EXIT, FOUND_SUBSTR,
7290 MATCH_SUBSTR_HEAD, RELOAD_STR, FOUND_CANDIDATE;
7291
7292 // Note, inline_string_indexOf() generates checks:
7293 // if (substr.count > string.count) return -1;
7294 // if (substr.count == 0) return 0;
7295 assert(int_cnt2 >= stride, "this code is used only for cnt2 >= 8 chars");
7296
7297 // Load substring.
7298 if (ae == StrIntrinsicNode::UL) {
7299 pmovzxbw(vec, Address(str2, 0));
7300 } else {
7301 movdqu(vec, Address(str2, 0));
7302 }
7303 movl(cnt2, int_cnt2);
7304 movptr(result, str1); // string addr
7305
7306 if (int_cnt2 > stride) {
7307 jmpb(SCAN_TO_SUBSTR);
7308
7309 // Reload substr for rescan, this code
7310 // is executed only for large substrings (> 8 chars)
7311 bind(RELOAD_SUBSTR);
7312 if (ae == StrIntrinsicNode::UL) {
7313 pmovzxbw(vec, Address(str2, 0));
7314 } else {
7315 movdqu(vec, Address(str2, 0));
7316 }
7317 negptr(cnt2); // Jumped here with negative cnt2, convert to positive
7318
7319 bind(RELOAD_STR);
7320 // We came here after the beginning of the substring was
7321 // matched but the rest of it was not so we need to search
7322 // again. Start from the next element after the previous match.
7323
7324 // cnt2 is number of substring reminding elements and
7325 // cnt1 is number of string reminding elements when cmp failed.
7326 // Restored cnt1 = cnt1 - cnt2 + int_cnt2
7327 subl(cnt1, cnt2);
7328 addl(cnt1, int_cnt2);
7329 movl(cnt2, int_cnt2); // Now restore cnt2
7330
7331 decrementl(cnt1); // Shift to next element
7332 cmpl(cnt1, cnt2);
7333 jcc(Assembler::negative, RET_NOT_FOUND); // Left less then substring
7334
7335 addptr(result, (1<<scale1));
7336
7337 } // (int_cnt2 > 8)
7338
7339 // Scan string for start of substr in 16-byte vectors
7340 bind(SCAN_TO_SUBSTR);
7341 pcmpestri(vec, Address(result, 0), mode);
7342 jccb(Assembler::below, FOUND_CANDIDATE); // CF == 1
7343 subl(cnt1, stride);
7344 jccb(Assembler::lessEqual, RET_NOT_FOUND); // Scanned full string
7345 cmpl(cnt1, cnt2);
7346 jccb(Assembler::negative, RET_NOT_FOUND); // Left less then substring
7347 addptr(result, 16);
7348 jmpb(SCAN_TO_SUBSTR);
7349
7350 // Found a potential substr
7351 bind(FOUND_CANDIDATE);
7352 // Matched whole vector if first element matched (tmp(rcx) == 0).
7353 if (int_cnt2 == stride) {
7354 jccb(Assembler::overflow, RET_FOUND); // OF == 1
7355 } else { // int_cnt2 > 8
7356 jccb(Assembler::overflow, FOUND_SUBSTR);
7357 }
7358 // After pcmpestri tmp(rcx) contains matched element index
7359 // Compute start addr of substr
7360 lea(result, Address(result, tmp, scale1));
7361
7362 // Make sure string is still long enough
7363 subl(cnt1, tmp);
7364 cmpl(cnt1, cnt2);
7365 if (int_cnt2 == stride) {
7366 jccb(Assembler::greaterEqual, SCAN_TO_SUBSTR);
7367 } else { // int_cnt2 > 8
7368 jccb(Assembler::greaterEqual, MATCH_SUBSTR_HEAD);
7369 }
7370 // Left less then substring.
7371
7372 bind(RET_NOT_FOUND);
7373 movl(result, -1);
7374 jmp(EXIT);
7375
7376 if (int_cnt2 > stride) {
7377 // This code is optimized for the case when whole substring
7378 // is matched if its head is matched.
7379 bind(MATCH_SUBSTR_HEAD);
7380 pcmpestri(vec, Address(result, 0), mode);
7381 // Reload only string if does not match
7382 jcc(Assembler::noOverflow, RELOAD_STR); // OF == 0
7383
7384 Label CONT_SCAN_SUBSTR;
7385 // Compare the rest of substring (> 8 chars).
7386 bind(FOUND_SUBSTR);
7387 // First 8 chars are already matched.
7388 negptr(cnt2);
7389 addptr(cnt2, stride);
7390
7391 bind(SCAN_SUBSTR);
7392 subl(cnt1, stride);
7393 cmpl(cnt2, -stride); // Do not read beyond substring
7394 jccb(Assembler::lessEqual, CONT_SCAN_SUBSTR);
7395 // Back-up strings to avoid reading beyond substring:
7396 // cnt1 = cnt1 - cnt2 + 8
7397 addl(cnt1, cnt2); // cnt2 is negative
7398 addl(cnt1, stride);
7399 movl(cnt2, stride); negptr(cnt2);
7400 bind(CONT_SCAN_SUBSTR);
7401 if (int_cnt2 < (int)G) {
7402 int tail_off1 = int_cnt2<<scale1;
7403 int tail_off2 = int_cnt2<<scale2;
7404 if (ae == StrIntrinsicNode::UL) {
7405 pmovzxbw(vec, Address(str2, cnt2, scale2, tail_off2));
7406 } else {
7407 movdqu(vec, Address(str2, cnt2, scale2, tail_off2));
7408 }
7409 pcmpestri(vec, Address(result, cnt2, scale1, tail_off1), mode);
7410 } else {
7411 // calculate index in register to avoid integer overflow (int_cnt2*2)
7412 movl(tmp, int_cnt2);
7413 addptr(tmp, cnt2);
7414 if (ae == StrIntrinsicNode::UL) {
7415 pmovzxbw(vec, Address(str2, tmp, scale2, 0));
7416 } else {
7417 movdqu(vec, Address(str2, tmp, scale2, 0));
7418 }
7419 pcmpestri(vec, Address(result, tmp, scale1, 0), mode);
7420 }
7421 // Need to reload strings pointers if not matched whole vector
7422 jcc(Assembler::noOverflow, RELOAD_SUBSTR); // OF == 0
7423 addptr(cnt2, stride);
7424 jcc(Assembler::negative, SCAN_SUBSTR);
7425 // Fall through if found full substring
7426
7427 } // (int_cnt2 > 8)
7428
7429 bind(RET_FOUND);
7430 // Found result if we matched full small substring.
7431 // Compute substr offset
7432 subptr(result, str1);
7433 if (ae == StrIntrinsicNode::UU || ae == StrIntrinsicNode::UL) {
7434 shrl(result, 1); // index
7435 }
7436 bind(EXIT);
7437
7438 } // string_indexofC8
7439
7440 // Small strings are loaded through stack if they cross page boundary.
7441 void MacroAssembler::string_indexof(Register str1, Register str2,
7442 Register cnt1, Register cnt2,
7443 int int_cnt2, Register result,
7444 XMMRegister vec, Register tmp,
7445 int ae) {
7446 ShortBranchVerifier sbv(this);
7447 assert(UseSSE42Intrinsics, "SSE4.2 intrinsics are required");
7448 assert(ae != StrIntrinsicNode::LU, "Invalid encoding");
7449
7450 //
7451 // int_cnt2 is length of small (< 8 chars) constant substring
7452 // or (-1) for non constant substring in which case its length
7453 // is in cnt2 register.
7454 //
7455 // Note, inline_string_indexOf() generates checks:
7456 // if (substr.count > string.count) return -1;
7457 // if (substr.count == 0) return 0;
7458 //
7459 int stride = (ae == StrIntrinsicNode::LL) ? 16 : 8; //UU, UL -> 8
7460 assert(int_cnt2 == -1 || (0 < int_cnt2 && int_cnt2 < stride), "should be != 0");
7461 // This method uses the pcmpestri instruction with bound registers
7462 // inputs:
7463 // xmm - substring
7464 // rax - substring length (elements count)
7465 // mem - scanned string
7466 // rdx - string length (elements count)
7467 // 0xd - mode: 1100 (substring search) + 01 (unsigned shorts)
7468 // 0xc - mode: 1100 (substring search) + 00 (unsigned bytes)
7469 // outputs:
7470 // rcx - matched index in string
7471 assert(cnt1 == rdx && cnt2 == rax && tmp == rcx, "pcmpestri");
7472 int mode = (ae == StrIntrinsicNode::LL) ? 0x0c : 0x0d; // bytes or shorts
7473 Address::ScaleFactor scale1 = (ae == StrIntrinsicNode::LL) ? Address::times_1 : Address::times_2;
7474 Address::ScaleFactor scale2 = (ae == StrIntrinsicNode::UL) ? Address::times_1 : scale1;
7475
7476 Label RELOAD_SUBSTR, SCAN_TO_SUBSTR, SCAN_SUBSTR, ADJUST_STR,
7477 RET_FOUND, RET_NOT_FOUND, CLEANUP, FOUND_SUBSTR,
7478 FOUND_CANDIDATE;
7479
7480 { //========================================================
7481 // We don't know where these strings are located
7482 // and we can't read beyond them. Load them through stack.
7483 Label BIG_STRINGS, CHECK_STR, COPY_SUBSTR, COPY_STR;
7484
7485 movptr(tmp, rsp); // save old SP
7486
7487 if (int_cnt2 > 0) { // small (< 8 chars) constant substring
7488 if (int_cnt2 == (1>>scale2)) { // One byte
7489 assert((ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UL), "Only possible for latin1 encoding");
7490 load_unsigned_byte(result, Address(str2, 0));
7491 movdl(vec, result); // move 32 bits
7492 } else if (ae == StrIntrinsicNode::LL && int_cnt2 == 3) { // Three bytes
7493 // Not enough header space in 32-bit VM: 12+3 = 15.
7494 movl(result, Address(str2, -1));
7495 shrl(result, 8);
7496 movdl(vec, result); // move 32 bits
7497 } else if (ae != StrIntrinsicNode::UL && int_cnt2 == (2>>scale2)) { // One char
7498 load_unsigned_short(result, Address(str2, 0));
7499 movdl(vec, result); // move 32 bits
7500 } else if (ae != StrIntrinsicNode::UL && int_cnt2 == (4>>scale2)) { // Two chars
7501 movdl(vec, Address(str2, 0)); // move 32 bits
7502 } else if (ae != StrIntrinsicNode::UL && int_cnt2 == (8>>scale2)) { // Four chars
7503 movq(vec, Address(str2, 0)); // move 64 bits
7504 } else { // cnt2 = { 3, 5, 6, 7 } || (ae == StrIntrinsicNode::UL && cnt2 ={2, ..., 7})
7505 // Array header size is 12 bytes in 32-bit VM
7506 // + 6 bytes for 3 chars == 18 bytes,
7507 // enough space to load vec and shift.
7508 assert(HeapWordSize*TypeArrayKlass::header_size() >= 12,"sanity");
7509 if (ae == StrIntrinsicNode::UL) {
7510 int tail_off = int_cnt2-8;
7511 pmovzxbw(vec, Address(str2, tail_off));
7512 psrldq(vec, -2*tail_off);
7513 }
7514 else {
7515 int tail_off = int_cnt2*(1<<scale2);
7516 movdqu(vec, Address(str2, tail_off-16));
7517 psrldq(vec, 16-tail_off);
7518 }
7519 }
7520 } else { // not constant substring
7521 cmpl(cnt2, stride);
7522 jccb(Assembler::aboveEqual, BIG_STRINGS); // Both strings are big enough
7523
7524 // We can read beyond string if srt+16 does not cross page boundary
7525 // since heaps are aligned and mapped by pages.
7526 assert(os::vm_page_size() < (int)G, "default page should be small");
7527 movl(result, str2); // We need only low 32 bits
7528 andl(result, (os::vm_page_size()-1));
7529 cmpl(result, (os::vm_page_size()-16));
7530 jccb(Assembler::belowEqual, CHECK_STR);
7531
7532 // Move small strings to stack to allow load 16 bytes into vec.
7533 subptr(rsp, 16);
7534 int stk_offset = wordSize-(1<<scale2);
7535 push(cnt2);
7536
7537 bind(COPY_SUBSTR);
7538 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UL) {
7539 load_unsigned_byte(result, Address(str2, cnt2, scale2, -1));
7540 movb(Address(rsp, cnt2, scale2, stk_offset), result);
7541 } else if (ae == StrIntrinsicNode::UU) {
7542 load_unsigned_short(result, Address(str2, cnt2, scale2, -2));
7543 movw(Address(rsp, cnt2, scale2, stk_offset), result);
7544 }
7545 decrement(cnt2);
7546 jccb(Assembler::notZero, COPY_SUBSTR);
7547
7548 pop(cnt2);
7549 movptr(str2, rsp); // New substring address
7550 } // non constant
7551
7552 bind(CHECK_STR);
7553 cmpl(cnt1, stride);
7554 jccb(Assembler::aboveEqual, BIG_STRINGS);
7555
7556 // Check cross page boundary.
7557 movl(result, str1); // We need only low 32 bits
7558 andl(result, (os::vm_page_size()-1));
7559 cmpl(result, (os::vm_page_size()-16));
7560 jccb(Assembler::belowEqual, BIG_STRINGS);
7561
7562 subptr(rsp, 16);
7563 int stk_offset = -(1<<scale1);
7564 if (int_cnt2 < 0) { // not constant
7565 push(cnt2);
7566 stk_offset += wordSize;
7567 }
7568 movl(cnt2, cnt1);
7569
7570 bind(COPY_STR);
7571 if (ae == StrIntrinsicNode::LL) {
7572 load_unsigned_byte(result, Address(str1, cnt2, scale1, -1));
7573 movb(Address(rsp, cnt2, scale1, stk_offset), result);
7574 } else {
7575 load_unsigned_short(result, Address(str1, cnt2, scale1, -2));
7576 movw(Address(rsp, cnt2, scale1, stk_offset), result);
7577 }
7578 decrement(cnt2);
7579 jccb(Assembler::notZero, COPY_STR);
7580
7581 if (int_cnt2 < 0) { // not constant
7582 pop(cnt2);
7583 }
7584 movptr(str1, rsp); // New string address
7585
7586 bind(BIG_STRINGS);
7587 // Load substring.
7588 if (int_cnt2 < 0) { // -1
7589 if (ae == StrIntrinsicNode::UL) {
7590 pmovzxbw(vec, Address(str2, 0));
7591 } else {
7592 movdqu(vec, Address(str2, 0));
7593 }
7594 push(cnt2); // substr count
7595 push(str2); // substr addr
7596 push(str1); // string addr
7597 } else {
7598 // Small (< 8 chars) constant substrings are loaded already.
7599 movl(cnt2, int_cnt2);
7600 }
7601 push(tmp); // original SP
7602
7603 } // Finished loading
7604
7605 //========================================================
7606 // Start search
7607 //
7608
7609 movptr(result, str1); // string addr
7610
7611 if (int_cnt2 < 0) { // Only for non constant substring
7612 jmpb(SCAN_TO_SUBSTR);
7613
7614 // SP saved at sp+0
7615 // String saved at sp+1*wordSize
7616 // Substr saved at sp+2*wordSize
7617 // Substr count saved at sp+3*wordSize
7618
7619 // Reload substr for rescan, this code
7620 // is executed only for large substrings (> 8 chars)
7621 bind(RELOAD_SUBSTR);
7622 movptr(str2, Address(rsp, 2*wordSize));
7623 movl(cnt2, Address(rsp, 3*wordSize));
7624 if (ae == StrIntrinsicNode::UL) {
7625 pmovzxbw(vec, Address(str2, 0));
7626 } else {
7627 movdqu(vec, Address(str2, 0));
7628 }
7629 // We came here after the beginning of the substring was
7630 // matched but the rest of it was not so we need to search
7631 // again. Start from the next element after the previous match.
7632 subptr(str1, result); // Restore counter
7633 if (ae == StrIntrinsicNode::UU || ae == StrIntrinsicNode::UL) {
7634 shrl(str1, 1);
7635 }
7636 addl(cnt1, str1);
7637 decrementl(cnt1); // Shift to next element
7638 cmpl(cnt1, cnt2);
7639 jcc(Assembler::negative, RET_NOT_FOUND); // Left less then substring
7640
7641 addptr(result, (1<<scale1));
7642 } // non constant
7643
7644 // Scan string for start of substr in 16-byte vectors
7645 bind(SCAN_TO_SUBSTR);
7646 assert(cnt1 == rdx && cnt2 == rax && tmp == rcx, "pcmpestri");
7647 pcmpestri(vec, Address(result, 0), mode);
7648 jccb(Assembler::below, FOUND_CANDIDATE); // CF == 1
7649 subl(cnt1, stride);
7650 jccb(Assembler::lessEqual, RET_NOT_FOUND); // Scanned full string
7651 cmpl(cnt1, cnt2);
7652 jccb(Assembler::negative, RET_NOT_FOUND); // Left less then substring
7653 addptr(result, 16);
7654
7655 bind(ADJUST_STR);
7656 cmpl(cnt1, stride); // Do not read beyond string
7657 jccb(Assembler::greaterEqual, SCAN_TO_SUBSTR);
7658 // Back-up string to avoid reading beyond string.
7659 lea(result, Address(result, cnt1, scale1, -16));
7660 movl(cnt1, stride);
7661 jmpb(SCAN_TO_SUBSTR);
7662
7663 // Found a potential substr
7664 bind(FOUND_CANDIDATE);
7665 // After pcmpestri tmp(rcx) contains matched element index
7666
7667 // Make sure string is still long enough
7668 subl(cnt1, tmp);
7669 cmpl(cnt1, cnt2);
7670 jccb(Assembler::greaterEqual, FOUND_SUBSTR);
7671 // Left less then substring.
7672
7673 bind(RET_NOT_FOUND);
7674 movl(result, -1);
7675 jmpb(CLEANUP);
7676
7677 bind(FOUND_SUBSTR);
7678 // Compute start addr of substr
7679 lea(result, Address(result, tmp, scale1));
7680 if (int_cnt2 > 0) { // Constant substring
7681 // Repeat search for small substring (< 8 chars)
7682 // from new point without reloading substring.
7683 // Have to check that we don't read beyond string.
7684 cmpl(tmp, stride-int_cnt2);
7685 jccb(Assembler::greater, ADJUST_STR);
7686 // Fall through if matched whole substring.
7687 } else { // non constant
7688 assert(int_cnt2 == -1, "should be != 0");
7689
7690 addl(tmp, cnt2);
7691 // Found result if we matched whole substring.
7692 cmpl(tmp, stride);
7693 jccb(Assembler::lessEqual, RET_FOUND);
7694
7695 // Repeat search for small substring (<= 8 chars)
7696 // from new point 'str1' without reloading substring.
7697 cmpl(cnt2, stride);
7698 // Have to check that we don't read beyond string.
7699 jccb(Assembler::lessEqual, ADJUST_STR);
7700
7701 Label CHECK_NEXT, CONT_SCAN_SUBSTR, RET_FOUND_LONG;
7702 // Compare the rest of substring (> 8 chars).
7703 movptr(str1, result);
7704
7705 cmpl(tmp, cnt2);
7706 // First 8 chars are already matched.
7707 jccb(Assembler::equal, CHECK_NEXT);
7708
7709 bind(SCAN_SUBSTR);
7710 pcmpestri(vec, Address(str1, 0), mode);
7711 // Need to reload strings pointers if not matched whole vector
7712 jcc(Assembler::noOverflow, RELOAD_SUBSTR); // OF == 0
7713
7714 bind(CHECK_NEXT);
7715 subl(cnt2, stride);
7716 jccb(Assembler::lessEqual, RET_FOUND_LONG); // Found full substring
7717 addptr(str1, 16);
7718 if (ae == StrIntrinsicNode::UL) {
7719 addptr(str2, 8);
7720 } else {
7721 addptr(str2, 16);
7722 }
7723 subl(cnt1, stride);
7724 cmpl(cnt2, stride); // Do not read beyond substring
7725 jccb(Assembler::greaterEqual, CONT_SCAN_SUBSTR);
7726 // Back-up strings to avoid reading beyond substring.
7727
7728 if (ae == StrIntrinsicNode::UL) {
7729 lea(str2, Address(str2, cnt2, scale2, -8));
7730 lea(str1, Address(str1, cnt2, scale1, -16));
7731 } else {
7732 lea(str2, Address(str2, cnt2, scale2, -16));
7733 lea(str1, Address(str1, cnt2, scale1, -16));
7734 }
7735 subl(cnt1, cnt2);
7736 movl(cnt2, stride);
7737 addl(cnt1, stride);
7738 bind(CONT_SCAN_SUBSTR);
7739 if (ae == StrIntrinsicNode::UL) {
7740 pmovzxbw(vec, Address(str2, 0));
7741 } else {
7742 movdqu(vec, Address(str2, 0));
7743 }
7744 jmp(SCAN_SUBSTR);
7745
7746 bind(RET_FOUND_LONG);
7747 movptr(str1, Address(rsp, wordSize));
7748 } // non constant
7749
7750 bind(RET_FOUND);
7751 // Compute substr offset
7752 subptr(result, str1);
7753 if (ae == StrIntrinsicNode::UU || ae == StrIntrinsicNode::UL) {
7754 shrl(result, 1); // index
7755 }
7756 bind(CLEANUP);
7757 pop(rsp); // restore SP
7758
7759 } // string_indexof
7760
7761 void MacroAssembler::string_indexof_char(Register str1, Register cnt1, Register ch, Register result,
7762 XMMRegister vec1, XMMRegister vec2, XMMRegister vec3, Register tmp) {
7763 ShortBranchVerifier sbv(this);
7764 assert(UseSSE42Intrinsics, "SSE4.2 intrinsics are required");
7765
7766 int stride = 8;
7767
7768 Label FOUND_CHAR, SCAN_TO_CHAR, SCAN_TO_CHAR_LOOP,
7769 SCAN_TO_8_CHAR, SCAN_TO_8_CHAR_LOOP, SCAN_TO_16_CHAR_LOOP,
7770 RET_NOT_FOUND, SCAN_TO_8_CHAR_INIT,
7771 FOUND_SEQ_CHAR, DONE_LABEL;
7772
7773 movptr(result, str1);
7774 if (UseAVX >= 2) {
7775 cmpl(cnt1, stride);
7776 jcc(Assembler::less, SCAN_TO_CHAR_LOOP);
7777 cmpl(cnt1, 2*stride);
7778 jcc(Assembler::less, SCAN_TO_8_CHAR_INIT);
7779 movdl(vec1, ch);
7780 vpbroadcastw(vec1, vec1);
7781 vpxor(vec2, vec2);
7782 movl(tmp, cnt1);
7783 andl(tmp, 0xFFFFFFF0); //vector count (in chars)
7784 andl(cnt1,0x0000000F); //tail count (in chars)
7785
7786 bind(SCAN_TO_16_CHAR_LOOP);
7787 vmovdqu(vec3, Address(result, 0));
7788 vpcmpeqw(vec3, vec3, vec1, 1);
7789 vptest(vec2, vec3);
7790 jcc(Assembler::carryClear, FOUND_CHAR);
7791 addptr(result, 32);
7792 subl(tmp, 2*stride);
7793 jccb(Assembler::notZero, SCAN_TO_16_CHAR_LOOP);
7794 jmp(SCAN_TO_8_CHAR);
7795 bind(SCAN_TO_8_CHAR_INIT);
7796 movdl(vec1, ch);
7797 pshuflw(vec1, vec1, 0x00);
7798 pshufd(vec1, vec1, 0);
7799 pxor(vec2, vec2);
7800 }
7801 bind(SCAN_TO_8_CHAR);
7802 cmpl(cnt1, stride);
7803 if (UseAVX >= 2) {
7804 jcc(Assembler::less, SCAN_TO_CHAR);
7805 } else {
7806 jcc(Assembler::less, SCAN_TO_CHAR_LOOP);
7807 movdl(vec1, ch);
7808 pshuflw(vec1, vec1, 0x00);
7809 pshufd(vec1, vec1, 0);
7810 pxor(vec2, vec2);
7811 }
7812 movl(tmp, cnt1);
7813 andl(tmp, 0xFFFFFFF8); //vector count (in chars)
7814 andl(cnt1,0x00000007); //tail count (in chars)
7815
7816 bind(SCAN_TO_8_CHAR_LOOP);
7817 movdqu(vec3, Address(result, 0));
7818 pcmpeqw(vec3, vec1);
7819 ptest(vec2, vec3);
7820 jcc(Assembler::carryClear, FOUND_CHAR);
7821 addptr(result, 16);
7822 subl(tmp, stride);
7823 jccb(Assembler::notZero, SCAN_TO_8_CHAR_LOOP);
7824 bind(SCAN_TO_CHAR);
7825 testl(cnt1, cnt1);
7826 jcc(Assembler::zero, RET_NOT_FOUND);
7827 bind(SCAN_TO_CHAR_LOOP);
7828 load_unsigned_short(tmp, Address(result, 0));
7829 cmpl(ch, tmp);
7830 jccb(Assembler::equal, FOUND_SEQ_CHAR);
7831 addptr(result, 2);
7832 subl(cnt1, 1);
7833 jccb(Assembler::zero, RET_NOT_FOUND);
7834 jmp(SCAN_TO_CHAR_LOOP);
7835
7836 bind(RET_NOT_FOUND);
7837 movl(result, -1);
7838 jmpb(DONE_LABEL);
7839
7840 bind(FOUND_CHAR);
7841 if (UseAVX >= 2) {
7842 vpmovmskb(tmp, vec3);
7843 } else {
7844 pmovmskb(tmp, vec3);
7845 }
7846 bsfl(ch, tmp);
7847 addl(result, ch);
7848
7849 bind(FOUND_SEQ_CHAR);
7850 subptr(result, str1);
7851 shrl(result, 1);
7852
7853 bind(DONE_LABEL);
7854 } // string_indexof_char
7855
7856 // helper function for string_compare
7857 void MacroAssembler::load_next_elements(Register elem1, Register elem2, Register str1, Register str2,
7858 Address::ScaleFactor scale, Address::ScaleFactor scale1,
7859 Address::ScaleFactor scale2, Register index, int ae) {
7860 if (ae == StrIntrinsicNode::LL) {
7861 load_unsigned_byte(elem1, Address(str1, index, scale, 0));
7862 load_unsigned_byte(elem2, Address(str2, index, scale, 0));
7863 } else if (ae == StrIntrinsicNode::UU) {
7864 load_unsigned_short(elem1, Address(str1, index, scale, 0));
7865 load_unsigned_short(elem2, Address(str2, index, scale, 0));
7866 } else {
7867 load_unsigned_byte(elem1, Address(str1, index, scale1, 0));
7868 load_unsigned_short(elem2, Address(str2, index, scale2, 0));
7869 }
7870 }
7871
7872 // Compare strings, used for char[] and byte[].
7873 void MacroAssembler::string_compare(Register str1, Register str2,
7874 Register cnt1, Register cnt2, Register result,
7875 XMMRegister vec1, int ae) {
7876 ShortBranchVerifier sbv(this);
7877 Label LENGTH_DIFF_LABEL, POP_LABEL, DONE_LABEL, WHILE_HEAD_LABEL;
7878 Label COMPARE_WIDE_VECTORS_LOOP_FAILED; // used only _LP64 && AVX3
7879 int stride, stride2, adr_stride, adr_stride1, adr_stride2;
7880 int stride2x2 = 0x40;
7881 Address::ScaleFactor scale = Address::no_scale;
7882 Address::ScaleFactor scale1 = Address::no_scale;
7883 Address::ScaleFactor scale2 = Address::no_scale;
7884
7885 if (ae != StrIntrinsicNode::LL) {
7886 stride2x2 = 0x20;
7887 }
7888
7889 if (ae == StrIntrinsicNode::LU || ae == StrIntrinsicNode::UL) {
7890 shrl(cnt2, 1);
7891 }
7892 // Compute the minimum of the string lengths and the
7893 // difference of the string lengths (stack).
7894 // Do the conditional move stuff
7895 movl(result, cnt1);
7896 subl(cnt1, cnt2);
7897 push(cnt1);
7898 cmov32(Assembler::lessEqual, cnt2, result); // cnt2 = min(cnt1, cnt2)
7899
7900 // Is the minimum length zero?
7901 testl(cnt2, cnt2);
7902 jcc(Assembler::zero, LENGTH_DIFF_LABEL);
7903 if (ae == StrIntrinsicNode::LL) {
7904 // Load first bytes
7905 load_unsigned_byte(result, Address(str1, 0)); // result = str1[0]
7906 load_unsigned_byte(cnt1, Address(str2, 0)); // cnt1 = str2[0]
7907 } else if (ae == StrIntrinsicNode::UU) {
7908 // Load first characters
7909 load_unsigned_short(result, Address(str1, 0));
7910 load_unsigned_short(cnt1, Address(str2, 0));
7911 } else {
7912 load_unsigned_byte(result, Address(str1, 0));
7913 load_unsigned_short(cnt1, Address(str2, 0));
7914 }
7915 subl(result, cnt1);
7916 jcc(Assembler::notZero, POP_LABEL);
7917
7918 if (ae == StrIntrinsicNode::UU) {
7919 // Divide length by 2 to get number of chars
7920 shrl(cnt2, 1);
7921 }
7922 cmpl(cnt2, 1);
7923 jcc(Assembler::equal, LENGTH_DIFF_LABEL);
7924
7925 // Check if the strings start at the same location and setup scale and stride
7926 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
7927 cmpptr(str1, str2);
7928 jcc(Assembler::equal, LENGTH_DIFF_LABEL);
7929 if (ae == StrIntrinsicNode::LL) {
7930 scale = Address::times_1;
7931 stride = 16;
7932 } else {
7933 scale = Address::times_2;
7934 stride = 8;
7935 }
7936 } else {
7937 scale1 = Address::times_1;
7938 scale2 = Address::times_2;
7939 // scale not used
7940 stride = 8;
7941 }
7942
7943 if (UseAVX >= 2 && UseSSE42Intrinsics) {
7944 Label COMPARE_WIDE_VECTORS, VECTOR_NOT_EQUAL, COMPARE_WIDE_TAIL, COMPARE_SMALL_STR;
7945 Label COMPARE_WIDE_VECTORS_LOOP, COMPARE_16_CHARS, COMPARE_INDEX_CHAR;
7946 Label COMPARE_WIDE_VECTORS_LOOP_AVX2;
7947 Label COMPARE_TAIL_LONG;
7948 Label COMPARE_WIDE_VECTORS_LOOP_AVX3; // used only _LP64 && AVX3
7949
7950 int pcmpmask = 0x19;
7951 if (ae == StrIntrinsicNode::LL) {
7952 pcmpmask &= ~0x01;
7953 }
7954
7955 // Setup to compare 16-chars (32-bytes) vectors,
7956 // start from first character again because it has aligned address.
7957 if (ae == StrIntrinsicNode::LL) {
7958 stride2 = 32;
7959 } else {
7960 stride2 = 16;
7961 }
7962 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
7963 adr_stride = stride << scale;
7964 } else {
7965 adr_stride1 = 8; //stride << scale1;
7966 adr_stride2 = 16; //stride << scale2;
7967 }
7968
7969 assert(result == rax && cnt2 == rdx && cnt1 == rcx, "pcmpestri");
7970 // rax and rdx are used by pcmpestri as elements counters
7971 movl(result, cnt2);
7972 andl(cnt2, ~(stride2-1)); // cnt2 holds the vector count
7973 jcc(Assembler::zero, COMPARE_TAIL_LONG);
7974
7975 // fast path : compare first 2 8-char vectors.
7976 bind(COMPARE_16_CHARS);
7977 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
7978 movdqu(vec1, Address(str1, 0));
7979 } else {
7980 pmovzxbw(vec1, Address(str1, 0));
7981 }
7982 pcmpestri(vec1, Address(str2, 0), pcmpmask);
7983 jccb(Assembler::below, COMPARE_INDEX_CHAR);
7984
7985 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
7986 movdqu(vec1, Address(str1, adr_stride));
7987 pcmpestri(vec1, Address(str2, adr_stride), pcmpmask);
7988 } else {
7989 pmovzxbw(vec1, Address(str1, adr_stride1));
7990 pcmpestri(vec1, Address(str2, adr_stride2), pcmpmask);
7991 }
7992 jccb(Assembler::aboveEqual, COMPARE_WIDE_VECTORS);
7993 addl(cnt1, stride);
7994
7995 // Compare the characters at index in cnt1
7996 bind(COMPARE_INDEX_CHAR); // cnt1 has the offset of the mismatching character
7997 load_next_elements(result, cnt2, str1, str2, scale, scale1, scale2, cnt1, ae);
7998 subl(result, cnt2);
7999 jmp(POP_LABEL);
8000
8001 // Setup the registers to start vector comparison loop
8002 bind(COMPARE_WIDE_VECTORS);
8003 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
8004 lea(str1, Address(str1, result, scale));
8005 lea(str2, Address(str2, result, scale));
8006 } else {
8007 lea(str1, Address(str1, result, scale1));
8008 lea(str2, Address(str2, result, scale2));
8009 }
8010 subl(result, stride2);
8011 subl(cnt2, stride2);
8012 jcc(Assembler::zero, COMPARE_WIDE_TAIL);
8013 negptr(result);
8014
8015 // In a loop, compare 16-chars (32-bytes) at once using (vpxor+vptest)
8016 bind(COMPARE_WIDE_VECTORS_LOOP);
8017
8018 #ifdef _LP64
8019 if (VM_Version::supports_avx512vlbw()) { // trying 64 bytes fast loop
8020 cmpl(cnt2, stride2x2);
8021 jccb(Assembler::below, COMPARE_WIDE_VECTORS_LOOP_AVX2);
8022 testl(cnt2, stride2x2-1); // cnt2 holds the vector count
8023 jccb(Assembler::notZero, COMPARE_WIDE_VECTORS_LOOP_AVX2); // means we cannot subtract by 0x40
8024
8025 bind(COMPARE_WIDE_VECTORS_LOOP_AVX3); // the hottest loop
8026 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
8027 evmovdquq(vec1, Address(str1, result, scale), Assembler::AVX_512bit);
8028 evpcmpeqb(k7, vec1, Address(str2, result, scale), Assembler::AVX_512bit); // k7 == 11..11, if operands equal, otherwise k7 has some 0
8029 } else {
8030 vpmovzxbw(vec1, Address(str1, result, scale1), Assembler::AVX_512bit);
8031 evpcmpeqb(k7, vec1, Address(str2, result, scale2), Assembler::AVX_512bit); // k7 == 11..11, if operands equal, otherwise k7 has some 0
8032 }
8033 kortestql(k7, k7);
8034 jcc(Assembler::aboveEqual, COMPARE_WIDE_VECTORS_LOOP_FAILED); // miscompare
8035 addptr(result, stride2x2); // update since we already compared at this addr
8036 subl(cnt2, stride2x2); // and sub the size too
8037 jccb(Assembler::notZero, COMPARE_WIDE_VECTORS_LOOP_AVX3);
8038
8039 vpxor(vec1, vec1);
8040 jmpb(COMPARE_WIDE_TAIL);
8041 }//if (VM_Version::supports_avx512vlbw())
8042 #endif // _LP64
8043
8044
8045 bind(COMPARE_WIDE_VECTORS_LOOP_AVX2);
8046 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
8047 vmovdqu(vec1, Address(str1, result, scale));
8048 vpxor(vec1, Address(str2, result, scale));
8049 } else {
8050 vpmovzxbw(vec1, Address(str1, result, scale1), Assembler::AVX_256bit);
8051 vpxor(vec1, Address(str2, result, scale2));
8052 }
8053 vptest(vec1, vec1);
8054 jcc(Assembler::notZero, VECTOR_NOT_EQUAL);
8055 addptr(result, stride2);
8056 subl(cnt2, stride2);
8057 jcc(Assembler::notZero, COMPARE_WIDE_VECTORS_LOOP);
8058 // clean upper bits of YMM registers
8059 vpxor(vec1, vec1);
8060
8061 // compare wide vectors tail
8062 bind(COMPARE_WIDE_TAIL);
8063 testptr(result, result);
8064 jcc(Assembler::zero, LENGTH_DIFF_LABEL);
8065
8066 movl(result, stride2);
8067 movl(cnt2, result);
8068 negptr(result);
8069 jmp(COMPARE_WIDE_VECTORS_LOOP_AVX2);
8070
8071 // Identifies the mismatching (higher or lower)16-bytes in the 32-byte vectors.
8072 bind(VECTOR_NOT_EQUAL);
8073 // clean upper bits of YMM registers
8074 vpxor(vec1, vec1);
8075 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
8076 lea(str1, Address(str1, result, scale));
8077 lea(str2, Address(str2, result, scale));
8078 } else {
8079 lea(str1, Address(str1, result, scale1));
8080 lea(str2, Address(str2, result, scale2));
8081 }
8082 jmp(COMPARE_16_CHARS);
8083
8084 // Compare tail chars, length between 1 to 15 chars
8085 bind(COMPARE_TAIL_LONG);
8086 movl(cnt2, result);
8087 cmpl(cnt2, stride);
8088 jcc(Assembler::less, COMPARE_SMALL_STR);
8089
8090 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
8091 movdqu(vec1, Address(str1, 0));
8092 } else {
8093 pmovzxbw(vec1, Address(str1, 0));
8094 }
8095 pcmpestri(vec1, Address(str2, 0), pcmpmask);
8096 jcc(Assembler::below, COMPARE_INDEX_CHAR);
8097 subptr(cnt2, stride);
8098 jcc(Assembler::zero, LENGTH_DIFF_LABEL);
8099 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
8100 lea(str1, Address(str1, result, scale));
8101 lea(str2, Address(str2, result, scale));
8102 } else {
8103 lea(str1, Address(str1, result, scale1));
8104 lea(str2, Address(str2, result, scale2));
8105 }
8106 negptr(cnt2);
8107 jmpb(WHILE_HEAD_LABEL);
8108
8109 bind(COMPARE_SMALL_STR);
8110 } else if (UseSSE42Intrinsics) {
8111 Label COMPARE_WIDE_VECTORS, VECTOR_NOT_EQUAL, COMPARE_TAIL;
8112 int pcmpmask = 0x19;
8113 // Setup to compare 8-char (16-byte) vectors,
8114 // start from first character again because it has aligned address.
8115 movl(result, cnt2);
8116 andl(cnt2, ~(stride - 1)); // cnt2 holds the vector count
8117 if (ae == StrIntrinsicNode::LL) {
8118 pcmpmask &= ~0x01;
8119 }
8120 jcc(Assembler::zero, COMPARE_TAIL);
8121 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
8122 lea(str1, Address(str1, result, scale));
8123 lea(str2, Address(str2, result, scale));
8124 } else {
8125 lea(str1, Address(str1, result, scale1));
8126 lea(str2, Address(str2, result, scale2));
8127 }
8128 negptr(result);
8129
8130 // pcmpestri
8131 // inputs:
8132 // vec1- substring
8133 // rax - negative string length (elements count)
8134 // mem - scanned string
8135 // rdx - string length (elements count)
8136 // pcmpmask - cmp mode: 11000 (string compare with negated result)
8137 // + 00 (unsigned bytes) or + 01 (unsigned shorts)
8138 // outputs:
8139 // rcx - first mismatched element index
8140 assert(result == rax && cnt2 == rdx && cnt1 == rcx, "pcmpestri");
8141
8142 bind(COMPARE_WIDE_VECTORS);
8143 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
8144 movdqu(vec1, Address(str1, result, scale));
8145 pcmpestri(vec1, Address(str2, result, scale), pcmpmask);
8146 } else {
8147 pmovzxbw(vec1, Address(str1, result, scale1));
8148 pcmpestri(vec1, Address(str2, result, scale2), pcmpmask);
8149 }
8150 // After pcmpestri cnt1(rcx) contains mismatched element index
8151
8152 jccb(Assembler::below, VECTOR_NOT_EQUAL); // CF==1
8153 addptr(result, stride);
8154 subptr(cnt2, stride);
8155 jccb(Assembler::notZero, COMPARE_WIDE_VECTORS);
8156
8157 // compare wide vectors tail
8158 testptr(result, result);
8159 jcc(Assembler::zero, LENGTH_DIFF_LABEL);
8160
8161 movl(cnt2, stride);
8162 movl(result, stride);
8163 negptr(result);
8164 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
8165 movdqu(vec1, Address(str1, result, scale));
8166 pcmpestri(vec1, Address(str2, result, scale), pcmpmask);
8167 } else {
8168 pmovzxbw(vec1, Address(str1, result, scale1));
8169 pcmpestri(vec1, Address(str2, result, scale2), pcmpmask);
8170 }
8171 jccb(Assembler::aboveEqual, LENGTH_DIFF_LABEL);
8172
8173 // Mismatched characters in the vectors
8174 bind(VECTOR_NOT_EQUAL);
8175 addptr(cnt1, result);
8176 load_next_elements(result, cnt2, str1, str2, scale, scale1, scale2, cnt1, ae);
8177 subl(result, cnt2);
8178 jmpb(POP_LABEL);
8179
8180 bind(COMPARE_TAIL); // limit is zero
8181 movl(cnt2, result);
8182 // Fallthru to tail compare
8183 }
8184 // Shift str2 and str1 to the end of the arrays, negate min
8185 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
8186 lea(str1, Address(str1, cnt2, scale));
8187 lea(str2, Address(str2, cnt2, scale));
8188 } else {
8189 lea(str1, Address(str1, cnt2, scale1));
8190 lea(str2, Address(str2, cnt2, scale2));
8191 }
8192 decrementl(cnt2); // first character was compared already
8193 negptr(cnt2);
8194
8195 // Compare the rest of the elements
8196 bind(WHILE_HEAD_LABEL);
8197 load_next_elements(result, cnt1, str1, str2, scale, scale1, scale2, cnt2, ae);
8198 subl(result, cnt1);
8199 jccb(Assembler::notZero, POP_LABEL);
8200 increment(cnt2);
8201 jccb(Assembler::notZero, WHILE_HEAD_LABEL);
8202
8203 // Strings are equal up to min length. Return the length difference.
8204 bind(LENGTH_DIFF_LABEL);
8205 pop(result);
8206 if (ae == StrIntrinsicNode::UU) {
8207 // Divide diff by 2 to get number of chars
8208 sarl(result, 1);
8209 }
8210 jmpb(DONE_LABEL);
8211
8212 #ifdef _LP64
8213 if (VM_Version::supports_avx512vlbw()) {
8214
8215 bind(COMPARE_WIDE_VECTORS_LOOP_FAILED);
8216
8217 kmovql(cnt1, k7);
8218 notq(cnt1);
8219 bsfq(cnt2, cnt1);
8220 if (ae != StrIntrinsicNode::LL) {
8221 // Divide diff by 2 to get number of chars
8222 sarl(cnt2, 1);
8223 }
8224 addq(result, cnt2);
8225 if (ae == StrIntrinsicNode::LL) {
8226 load_unsigned_byte(cnt1, Address(str2, result));
8227 load_unsigned_byte(result, Address(str1, result));
8228 } else if (ae == StrIntrinsicNode::UU) {
8229 load_unsigned_short(cnt1, Address(str2, result, scale));
8230 load_unsigned_short(result, Address(str1, result, scale));
8231 } else {
8232 load_unsigned_short(cnt1, Address(str2, result, scale2));
8233 load_unsigned_byte(result, Address(str1, result, scale1));
8234 }
8235 subl(result, cnt1);
8236 jmpb(POP_LABEL);
8237 }//if (VM_Version::supports_avx512vlbw())
8238 #endif // _LP64
8239
8240 // Discard the stored length difference
8241 bind(POP_LABEL);
8242 pop(cnt1);
8243
8244 // That's it
8245 bind(DONE_LABEL);
8246 if(ae == StrIntrinsicNode::UL) {
8247 negl(result);
8248 }
8249
8250 }
8251
8252 // Search for Non-ASCII character (Negative byte value) in a byte array,
8253 // return true if it has any and false otherwise.
8254 // ..\jdk\src\java.base\share\classes\java\lang\StringCoding.java
8255 // @HotSpotIntrinsicCandidate
8256 // private static boolean hasNegatives(byte[] ba, int off, int len) {
8257 // for (int i = off; i < off + len; i++) {
8258 // if (ba[i] < 0) {
8259 // return true;
8260 // }
8261 // }
8262 // return false;
8263 // }
8264 void MacroAssembler::has_negatives(Register ary1, Register len,
8265 Register result, Register tmp1,
8266 XMMRegister vec1, XMMRegister vec2) {
8267 // rsi: byte array
8268 // rcx: len
8269 // rax: result
8270 ShortBranchVerifier sbv(this);
8271 assert_different_registers(ary1, len, result, tmp1);
8272 assert_different_registers(vec1, vec2);
8273 Label TRUE_LABEL, FALSE_LABEL, DONE, COMPARE_CHAR, COMPARE_VECTORS, COMPARE_BYTE;
8274
8275 // len == 0
8276 testl(len, len);
8277 jcc(Assembler::zero, FALSE_LABEL);
8278
8279 if ((UseAVX > 2) && // AVX512
8280 VM_Version::supports_avx512vlbw() &&
8281 VM_Version::supports_bmi2()) {
8282
8283 set_vector_masking(); // opening of the stub context for programming mask registers
8284
8285 Label test_64_loop, test_tail;
8286 Register tmp3_aliased = len;
8287
8288 movl(tmp1, len);
8289 vpxor(vec2, vec2, vec2, Assembler::AVX_512bit);
8290
8291 andl(tmp1, 64 - 1); // tail count (in chars) 0x3F
8292 andl(len, ~(64 - 1)); // vector count (in chars)
8293 jccb(Assembler::zero, test_tail);
8294
8295 lea(ary1, Address(ary1, len, Address::times_1));
8296 negptr(len);
8297
8298 bind(test_64_loop);
8299 // Check whether our 64 elements of size byte contain negatives
8300 evpcmpgtb(k2, vec2, Address(ary1, len, Address::times_1), Assembler::AVX_512bit);
8301 kortestql(k2, k2);
8302 jcc(Assembler::notZero, TRUE_LABEL);
8303
8304 addptr(len, 64);
8305 jccb(Assembler::notZero, test_64_loop);
8306
8307
8308 bind(test_tail);
8309 // bail out when there is nothing to be done
8310 testl(tmp1, -1);
8311 jcc(Assembler::zero, FALSE_LABEL);
8312
8313 // Save k1
8314 kmovql(k3, k1);
8315
8316 // ~(~0 << len) applied up to two times (for 32-bit scenario)
8317 #ifdef _LP64
8318 mov64(tmp3_aliased, 0xFFFFFFFFFFFFFFFF);
8319 shlxq(tmp3_aliased, tmp3_aliased, tmp1);
8320 notq(tmp3_aliased);
8321 kmovql(k1, tmp3_aliased);
8322 #else
8323 Label k_init;
8324 jmp(k_init);
8325
8326 // We could not read 64-bits from a general purpose register thus we move
8327 // data required to compose 64 1's to the instruction stream
8328 // We emit 64 byte wide series of elements from 0..63 which later on would
8329 // be used as a compare targets with tail count contained in tmp1 register.
8330 // Result would be a k1 register having tmp1 consecutive number or 1
8331 // counting from least significant bit.
8332 address tmp = pc();
8333 emit_int64(0x0706050403020100);
8334 emit_int64(0x0F0E0D0C0B0A0908);
8335 emit_int64(0x1716151413121110);
8336 emit_int64(0x1F1E1D1C1B1A1918);
8337 emit_int64(0x2726252423222120);
8338 emit_int64(0x2F2E2D2C2B2A2928);
8339 emit_int64(0x3736353433323130);
8340 emit_int64(0x3F3E3D3C3B3A3938);
8341
8342 bind(k_init);
8343 lea(len, InternalAddress(tmp));
8344 // create mask to test for negative byte inside a vector
8345 evpbroadcastb(vec1, tmp1, Assembler::AVX_512bit);
8346 evpcmpgtb(k1, vec1, Address(len, 0), Assembler::AVX_512bit);
8347
8348 #endif
8349 evpcmpgtb(k2, k1, vec2, Address(ary1, 0), Assembler::AVX_512bit);
8350 ktestq(k2, k1);
8351 // Restore k1
8352 kmovql(k1, k3);
8353 jcc(Assembler::notZero, TRUE_LABEL);
8354
8355 jmp(FALSE_LABEL);
8356
8357 clear_vector_masking(); // closing of the stub context for programming mask registers
8358 } else {
8359 movl(result, len); // copy
8360
8361 if (UseAVX == 2 && UseSSE >= 2) {
8362 // With AVX2, use 32-byte vector compare
8363 Label COMPARE_WIDE_VECTORS, COMPARE_TAIL;
8364
8365 // Compare 32-byte vectors
8366 andl(result, 0x0000001f); // tail count (in bytes)
8367 andl(len, 0xffffffe0); // vector count (in bytes)
8368 jccb(Assembler::zero, COMPARE_TAIL);
8369
8370 lea(ary1, Address(ary1, len, Address::times_1));
8371 negptr(len);
8372
8373 movl(tmp1, 0x80808080); // create mask to test for Unicode chars in vector
8374 movdl(vec2, tmp1);
8375 vpbroadcastd(vec2, vec2);
8376
8377 bind(COMPARE_WIDE_VECTORS);
8378 vmovdqu(vec1, Address(ary1, len, Address::times_1));
8379 vptest(vec1, vec2);
8380 jccb(Assembler::notZero, TRUE_LABEL);
8381 addptr(len, 32);
8382 jcc(Assembler::notZero, COMPARE_WIDE_VECTORS);
8383
8384 testl(result, result);
8385 jccb(Assembler::zero, FALSE_LABEL);
8386
8387 vmovdqu(vec1, Address(ary1, result, Address::times_1, -32));
8388 vptest(vec1, vec2);
8389 jccb(Assembler::notZero, TRUE_LABEL);
8390 jmpb(FALSE_LABEL);
8391
8392 bind(COMPARE_TAIL); // len is zero
8393 movl(len, result);
8394 // Fallthru to tail compare
8395 } else if (UseSSE42Intrinsics) {
8396 // With SSE4.2, use double quad vector compare
8397 Label COMPARE_WIDE_VECTORS, COMPARE_TAIL;
8398
8399 // Compare 16-byte vectors
8400 andl(result, 0x0000000f); // tail count (in bytes)
8401 andl(len, 0xfffffff0); // vector count (in bytes)
8402 jccb(Assembler::zero, COMPARE_TAIL);
8403
8404 lea(ary1, Address(ary1, len, Address::times_1));
8405 negptr(len);
8406
8407 movl(tmp1, 0x80808080);
8408 movdl(vec2, tmp1);
8409 pshufd(vec2, vec2, 0);
8410
8411 bind(COMPARE_WIDE_VECTORS);
8412 movdqu(vec1, Address(ary1, len, Address::times_1));
8413 ptest(vec1, vec2);
8414 jccb(Assembler::notZero, TRUE_LABEL);
8415 addptr(len, 16);
8416 jcc(Assembler::notZero, COMPARE_WIDE_VECTORS);
8417
8418 testl(result, result);
8419 jccb(Assembler::zero, FALSE_LABEL);
8420
8421 movdqu(vec1, Address(ary1, result, Address::times_1, -16));
8422 ptest(vec1, vec2);
8423 jccb(Assembler::notZero, TRUE_LABEL);
8424 jmpb(FALSE_LABEL);
8425
8426 bind(COMPARE_TAIL); // len is zero
8427 movl(len, result);
8428 // Fallthru to tail compare
8429 }
8430 }
8431 // Compare 4-byte vectors
8432 andl(len, 0xfffffffc); // vector count (in bytes)
8433 jccb(Assembler::zero, COMPARE_CHAR);
8434
8435 lea(ary1, Address(ary1, len, Address::times_1));
8436 negptr(len);
8437
8438 bind(COMPARE_VECTORS);
8439 movl(tmp1, Address(ary1, len, Address::times_1));
8440 andl(tmp1, 0x80808080);
8441 jccb(Assembler::notZero, TRUE_LABEL);
8442 addptr(len, 4);
8443 jcc(Assembler::notZero, COMPARE_VECTORS);
8444
8445 // Compare trailing char (final 2 bytes), if any
8446 bind(COMPARE_CHAR);
8447 testl(result, 0x2); // tail char
8448 jccb(Assembler::zero, COMPARE_BYTE);
8449 load_unsigned_short(tmp1, Address(ary1, 0));
8450 andl(tmp1, 0x00008080);
8451 jccb(Assembler::notZero, TRUE_LABEL);
8452 subptr(result, 2);
8453 lea(ary1, Address(ary1, 2));
8454
8455 bind(COMPARE_BYTE);
8456 testl(result, 0x1); // tail byte
8457 jccb(Assembler::zero, FALSE_LABEL);
8458 load_unsigned_byte(tmp1, Address(ary1, 0));
8459 andl(tmp1, 0x00000080);
8460 jccb(Assembler::notEqual, TRUE_LABEL);
8461 jmpb(FALSE_LABEL);
8462
8463 bind(TRUE_LABEL);
8464 movl(result, 1); // return true
8465 jmpb(DONE);
8466
8467 bind(FALSE_LABEL);
8468 xorl(result, result); // return false
8469
8470 // That's it
8471 bind(DONE);
8472 if (UseAVX >= 2 && UseSSE >= 2) {
8473 // clean upper bits of YMM registers
8474 vpxor(vec1, vec1);
8475 vpxor(vec2, vec2);
8476 }
8477 }
8478 // Compare char[] or byte[] arrays aligned to 4 bytes or substrings.
8479 void MacroAssembler::arrays_equals(bool is_array_equ, Register ary1, Register ary2,
8480 Register limit, Register result, Register chr,
8481 XMMRegister vec1, XMMRegister vec2, bool is_char) {
8482 ShortBranchVerifier sbv(this);
8483 Label TRUE_LABEL, FALSE_LABEL, DONE, COMPARE_VECTORS, COMPARE_CHAR, COMPARE_BYTE;
8484
8485 int length_offset = arrayOopDesc::length_offset_in_bytes();
8486 int base_offset = arrayOopDesc::base_offset_in_bytes(is_char ? T_CHAR : T_BYTE);
8487
8488 if (is_array_equ) {
8489 // Check the input args
8490 cmpoop(ary1, ary2);
8491 jcc(Assembler::equal, TRUE_LABEL);
8492
8493 // Need additional checks for arrays_equals.
8494 testptr(ary1, ary1);
8495 jcc(Assembler::zero, FALSE_LABEL);
8496 testptr(ary2, ary2);
8497 jcc(Assembler::zero, FALSE_LABEL);
8498
8499 // Check the lengths
8500 movl(limit, Address(ary1, length_offset));
8501 cmpl(limit, Address(ary2, length_offset));
8502 jcc(Assembler::notEqual, FALSE_LABEL);
8503 }
8504
8505 // count == 0
8506 testl(limit, limit);
8507 jcc(Assembler::zero, TRUE_LABEL);
8508
8509 if (is_array_equ) {
8510 // Load array address
8511 lea(ary1, Address(ary1, base_offset));
8512 lea(ary2, Address(ary2, base_offset));
8513 }
8514
8515 if (is_array_equ && is_char) {
8516 // arrays_equals when used for char[].
8517 shll(limit, 1); // byte count != 0
8518 }
8519 movl(result, limit); // copy
8520
8521 if (UseAVX >= 2) {
8522 // With AVX2, use 32-byte vector compare
8523 Label COMPARE_WIDE_VECTORS, COMPARE_TAIL;
8524
8525 // Compare 32-byte vectors
8526 andl(result, 0x0000001f); // tail count (in bytes)
8527 andl(limit, 0xffffffe0); // vector count (in bytes)
8528 jcc(Assembler::zero, COMPARE_TAIL);
8529
8530 lea(ary1, Address(ary1, limit, Address::times_1));
8531 lea(ary2, Address(ary2, limit, Address::times_1));
8532 negptr(limit);
8533
8534 bind(COMPARE_WIDE_VECTORS);
8535
8536 #ifdef _LP64
8537 if (VM_Version::supports_avx512vlbw()) { // trying 64 bytes fast loop
8538 Label COMPARE_WIDE_VECTORS_LOOP_AVX2, COMPARE_WIDE_VECTORS_LOOP_AVX3;
8539
8540 cmpl(limit, -64);
8541 jccb(Assembler::greater, COMPARE_WIDE_VECTORS_LOOP_AVX2);
8542
8543 bind(COMPARE_WIDE_VECTORS_LOOP_AVX3); // the hottest loop
8544
8545 evmovdquq(vec1, Address(ary1, limit, Address::times_1), Assembler::AVX_512bit);
8546 evpcmpeqb(k7, vec1, Address(ary2, limit, Address::times_1), Assembler::AVX_512bit);
8547 kortestql(k7, k7);
8548 jcc(Assembler::aboveEqual, FALSE_LABEL); // miscompare
8549 addptr(limit, 64); // update since we already compared at this addr
8550 cmpl(limit, -64);
8551 jccb(Assembler::lessEqual, COMPARE_WIDE_VECTORS_LOOP_AVX3);
8552
8553 // At this point we may still need to compare -limit+result bytes.
8554 // We could execute the next two instruction and just continue via non-wide path:
8555 // cmpl(limit, 0);
8556 // jcc(Assembler::equal, COMPARE_TAIL); // true
8557 // But since we stopped at the points ary{1,2}+limit which are
8558 // not farther than 64 bytes from the ends of arrays ary{1,2}+result
8559 // (|limit| <= 32 and result < 32),
8560 // we may just compare the last 64 bytes.
8561 //
8562 addptr(result, -64); // it is safe, bc we just came from this area
8563 evmovdquq(vec1, Address(ary1, result, Address::times_1), Assembler::AVX_512bit);
8564 evpcmpeqb(k7, vec1, Address(ary2, result, Address::times_1), Assembler::AVX_512bit);
8565 kortestql(k7, k7);
8566 jcc(Assembler::aboveEqual, FALSE_LABEL); // miscompare
8567
8568 jmp(TRUE_LABEL);
8569
8570 bind(COMPARE_WIDE_VECTORS_LOOP_AVX2);
8571
8572 }//if (VM_Version::supports_avx512vlbw())
8573 #endif //_LP64
8574
8575 vmovdqu(vec1, Address(ary1, limit, Address::times_1));
8576 vmovdqu(vec2, Address(ary2, limit, Address::times_1));
8577 vpxor(vec1, vec2);
8578
8579 vptest(vec1, vec1);
8580 jcc(Assembler::notZero, FALSE_LABEL);
8581 addptr(limit, 32);
8582 jcc(Assembler::notZero, COMPARE_WIDE_VECTORS);
8583
8584 testl(result, result);
8585 jcc(Assembler::zero, TRUE_LABEL);
8586
8587 vmovdqu(vec1, Address(ary1, result, Address::times_1, -32));
8588 vmovdqu(vec2, Address(ary2, result, Address::times_1, -32));
8589 vpxor(vec1, vec2);
8590
8591 vptest(vec1, vec1);
8592 jccb(Assembler::notZero, FALSE_LABEL);
8593 jmpb(TRUE_LABEL);
8594
8595 bind(COMPARE_TAIL); // limit is zero
8596 movl(limit, result);
8597 // Fallthru to tail compare
8598 } else if (UseSSE42Intrinsics) {
8599 // With SSE4.2, use double quad vector compare
8600 Label COMPARE_WIDE_VECTORS, COMPARE_TAIL;
8601
8602 // Compare 16-byte vectors
8603 andl(result, 0x0000000f); // tail count (in bytes)
8604 andl(limit, 0xfffffff0); // vector count (in bytes)
8605 jcc(Assembler::zero, COMPARE_TAIL);
8606
8607 lea(ary1, Address(ary1, limit, Address::times_1));
8608 lea(ary2, Address(ary2, limit, Address::times_1));
8609 negptr(limit);
8610
8611 bind(COMPARE_WIDE_VECTORS);
8612 movdqu(vec1, Address(ary1, limit, Address::times_1));
8613 movdqu(vec2, Address(ary2, limit, Address::times_1));
8614 pxor(vec1, vec2);
8615
8616 ptest(vec1, vec1);
8617 jcc(Assembler::notZero, FALSE_LABEL);
8618 addptr(limit, 16);
8619 jcc(Assembler::notZero, COMPARE_WIDE_VECTORS);
8620
8621 testl(result, result);
8622 jcc(Assembler::zero, TRUE_LABEL);
8623
8624 movdqu(vec1, Address(ary1, result, Address::times_1, -16));
8625 movdqu(vec2, Address(ary2, result, Address::times_1, -16));
8626 pxor(vec1, vec2);
8627
8628 ptest(vec1, vec1);
8629 jccb(Assembler::notZero, FALSE_LABEL);
8630 jmpb(TRUE_LABEL);
8631
8632 bind(COMPARE_TAIL); // limit is zero
8633 movl(limit, result);
8634 // Fallthru to tail compare
8635 }
8636
8637 // Compare 4-byte vectors
8638 andl(limit, 0xfffffffc); // vector count (in bytes)
8639 jccb(Assembler::zero, COMPARE_CHAR);
8640
8641 lea(ary1, Address(ary1, limit, Address::times_1));
8642 lea(ary2, Address(ary2, limit, Address::times_1));
8643 negptr(limit);
8644
8645 bind(COMPARE_VECTORS);
8646 movl(chr, Address(ary1, limit, Address::times_1));
8647 cmpl(chr, Address(ary2, limit, Address::times_1));
8648 jccb(Assembler::notEqual, FALSE_LABEL);
8649 addptr(limit, 4);
8650 jcc(Assembler::notZero, COMPARE_VECTORS);
8651
8652 // Compare trailing char (final 2 bytes), if any
8653 bind(COMPARE_CHAR);
8654 testl(result, 0x2); // tail char
8655 jccb(Assembler::zero, COMPARE_BYTE);
8656 load_unsigned_short(chr, Address(ary1, 0));
8657 load_unsigned_short(limit, Address(ary2, 0));
8658 cmpl(chr, limit);
8659 jccb(Assembler::notEqual, FALSE_LABEL);
8660
8661 if (is_array_equ && is_char) {
8662 bind(COMPARE_BYTE);
8663 } else {
8664 lea(ary1, Address(ary1, 2));
8665 lea(ary2, Address(ary2, 2));
8666
8667 bind(COMPARE_BYTE);
8668 testl(result, 0x1); // tail byte
8669 jccb(Assembler::zero, TRUE_LABEL);
8670 load_unsigned_byte(chr, Address(ary1, 0));
8671 load_unsigned_byte(limit, Address(ary2, 0));
8672 cmpl(chr, limit);
8673 jccb(Assembler::notEqual, FALSE_LABEL);
8674 }
8675 bind(TRUE_LABEL);
8676 movl(result, 1); // return true
8677 jmpb(DONE);
8678
8679 bind(FALSE_LABEL);
8680 xorl(result, result); // return false
8681
8682 // That's it
8683 bind(DONE);
8684 if (UseAVX >= 2) {
8685 // clean upper bits of YMM registers
8686 vpxor(vec1, vec1);
8687 vpxor(vec2, vec2);
8688 }
8689 }
8690
8691 #endif
8692
8693 void MacroAssembler::generate_fill(BasicType t, bool aligned,
8694 Register to, Register value, Register count,
8695 Register rtmp, XMMRegister xtmp) {
8696 ShortBranchVerifier sbv(this);
8697 assert_different_registers(to, value, count, rtmp);
8698 Label L_exit, L_skip_align1, L_skip_align2, L_fill_byte;
8699 Label L_fill_2_bytes, L_fill_4_bytes;
8700
8701 int shift = -1;
8702 switch (t) {
8703 case T_BYTE:
8704 shift = 2;
8705 break;
8706 case T_SHORT:
8707 shift = 1;
8708 break;
8709 case T_INT:
8710 shift = 0;
8711 break;
8712 default: ShouldNotReachHere();
8713 }
8714
8715 if (t == T_BYTE) {
8716 andl(value, 0xff);
8717 movl(rtmp, value);
8718 shll(rtmp, 8);
8719 orl(value, rtmp);
8720 }
8721 if (t == T_SHORT) {
8722 andl(value, 0xffff);
8723 }
8724 if (t == T_BYTE || t == T_SHORT) {
8725 movl(rtmp, value);
8726 shll(rtmp, 16);
8727 orl(value, rtmp);
8728 }
8729
8730 cmpl(count, 2<<shift); // Short arrays (< 8 bytes) fill by element
8731 jcc(Assembler::below, L_fill_4_bytes); // use unsigned cmp
8732 if (!UseUnalignedLoadStores && !aligned && (t == T_BYTE || t == T_SHORT)) {
8733 // align source address at 4 bytes address boundary
8734 if (t == T_BYTE) {
8735 // One byte misalignment happens only for byte arrays
8736 testptr(to, 1);
8737 jccb(Assembler::zero, L_skip_align1);
8738 movb(Address(to, 0), value);
8739 increment(to);
8740 decrement(count);
8741 BIND(L_skip_align1);
8742 }
8743 // Two bytes misalignment happens only for byte and short (char) arrays
8744 testptr(to, 2);
8745 jccb(Assembler::zero, L_skip_align2);
8746 movw(Address(to, 0), value);
8747 addptr(to, 2);
8748 subl(count, 1<<(shift-1));
8749 BIND(L_skip_align2);
8750 }
8751 if (UseSSE < 2) {
8752 Label L_fill_32_bytes_loop, L_check_fill_8_bytes, L_fill_8_bytes_loop, L_fill_8_bytes;
8753 // Fill 32-byte chunks
8754 subl(count, 8 << shift);
8755 jcc(Assembler::less, L_check_fill_8_bytes);
8756 align(16);
8757
8758 BIND(L_fill_32_bytes_loop);
8759
8760 for (int i = 0; i < 32; i += 4) {
8761 movl(Address(to, i), value);
8762 }
8763
8764 addptr(to, 32);
8765 subl(count, 8 << shift);
8766 jcc(Assembler::greaterEqual, L_fill_32_bytes_loop);
8767 BIND(L_check_fill_8_bytes);
8768 addl(count, 8 << shift);
8769 jccb(Assembler::zero, L_exit);
8770 jmpb(L_fill_8_bytes);
8771
8772 //
8773 // length is too short, just fill qwords
8774 //
8775 BIND(L_fill_8_bytes_loop);
8776 movl(Address(to, 0), value);
8777 movl(Address(to, 4), value);
8778 addptr(to, 8);
8779 BIND(L_fill_8_bytes);
8780 subl(count, 1 << (shift + 1));
8781 jcc(Assembler::greaterEqual, L_fill_8_bytes_loop);
8782 // fall through to fill 4 bytes
8783 } else {
8784 Label L_fill_32_bytes;
8785 if (!UseUnalignedLoadStores) {
8786 // align to 8 bytes, we know we are 4 byte aligned to start
8787 testptr(to, 4);
8788 jccb(Assembler::zero, L_fill_32_bytes);
8789 movl(Address(to, 0), value);
8790 addptr(to, 4);
8791 subl(count, 1<<shift);
8792 }
8793 BIND(L_fill_32_bytes);
8794 {
8795 assert( UseSSE >= 2, "supported cpu only" );
8796 Label L_fill_32_bytes_loop, L_check_fill_8_bytes, L_fill_8_bytes_loop, L_fill_8_bytes;
8797 if (UseAVX > 2) {
8798 movl(rtmp, 0xffff);
8799 kmovwl(k1, rtmp);
8800 }
8801 movdl(xtmp, value);
8802 if (UseAVX > 2 && UseUnalignedLoadStores) {
8803 // Fill 64-byte chunks
8804 Label L_fill_64_bytes_loop, L_check_fill_32_bytes;
8805 evpbroadcastd(xtmp, xtmp, Assembler::AVX_512bit);
8806
8807 subl(count, 16 << shift);
8808 jcc(Assembler::less, L_check_fill_32_bytes);
8809 align(16);
8810
8811 BIND(L_fill_64_bytes_loop);
8812 evmovdqul(Address(to, 0), xtmp, Assembler::AVX_512bit);
8813 addptr(to, 64);
8814 subl(count, 16 << shift);
8815 jcc(Assembler::greaterEqual, L_fill_64_bytes_loop);
8816
8817 BIND(L_check_fill_32_bytes);
8818 addl(count, 8 << shift);
8819 jccb(Assembler::less, L_check_fill_8_bytes);
8820 vmovdqu(Address(to, 0), xtmp);
8821 addptr(to, 32);
8822 subl(count, 8 << shift);
8823
8824 BIND(L_check_fill_8_bytes);
8825 } else if (UseAVX == 2 && UseUnalignedLoadStores) {
8826 // Fill 64-byte chunks
8827 Label L_fill_64_bytes_loop, L_check_fill_32_bytes;
8828 vpbroadcastd(xtmp, xtmp);
8829
8830 subl(count, 16 << shift);
8831 jcc(Assembler::less, L_check_fill_32_bytes);
8832 align(16);
8833
8834 BIND(L_fill_64_bytes_loop);
8835 vmovdqu(Address(to, 0), xtmp);
8836 vmovdqu(Address(to, 32), xtmp);
8837 addptr(to, 64);
8838 subl(count, 16 << shift);
8839 jcc(Assembler::greaterEqual, L_fill_64_bytes_loop);
8840
8841 BIND(L_check_fill_32_bytes);
8842 addl(count, 8 << shift);
8843 jccb(Assembler::less, L_check_fill_8_bytes);
8844 vmovdqu(Address(to, 0), xtmp);
8845 addptr(to, 32);
8846 subl(count, 8 << shift);
8847
8848 BIND(L_check_fill_8_bytes);
8849 // clean upper bits of YMM registers
8850 movdl(xtmp, value);
8851 pshufd(xtmp, xtmp, 0);
8852 } else {
8853 // Fill 32-byte chunks
8854 pshufd(xtmp, xtmp, 0);
8855
8856 subl(count, 8 << shift);
8857 jcc(Assembler::less, L_check_fill_8_bytes);
8858 align(16);
8859
8860 BIND(L_fill_32_bytes_loop);
8861
8862 if (UseUnalignedLoadStores) {
8863 movdqu(Address(to, 0), xtmp);
8864 movdqu(Address(to, 16), xtmp);
8865 } else {
8866 movq(Address(to, 0), xtmp);
8867 movq(Address(to, 8), xtmp);
8868 movq(Address(to, 16), xtmp);
8869 movq(Address(to, 24), xtmp);
8870 }
8871
8872 addptr(to, 32);
8873 subl(count, 8 << shift);
8874 jcc(Assembler::greaterEqual, L_fill_32_bytes_loop);
8875
8876 BIND(L_check_fill_8_bytes);
8877 }
8878 addl(count, 8 << shift);
8879 jccb(Assembler::zero, L_exit);
8880 jmpb(L_fill_8_bytes);
8881
8882 //
8883 // length is too short, just fill qwords
8884 //
8885 BIND(L_fill_8_bytes_loop);
8886 movq(Address(to, 0), xtmp);
8887 addptr(to, 8);
8888 BIND(L_fill_8_bytes);
8889 subl(count, 1 << (shift + 1));
8890 jcc(Assembler::greaterEqual, L_fill_8_bytes_loop);
8891 }
8892 }
8893 // fill trailing 4 bytes
8894 BIND(L_fill_4_bytes);
8895 testl(count, 1<<shift);
8896 jccb(Assembler::zero, L_fill_2_bytes);
8897 movl(Address(to, 0), value);
8898 if (t == T_BYTE || t == T_SHORT) {
8899 addptr(to, 4);
8900 BIND(L_fill_2_bytes);
8901 // fill trailing 2 bytes
8902 testl(count, 1<<(shift-1));
8903 jccb(Assembler::zero, L_fill_byte);
8904 movw(Address(to, 0), value);
8905 if (t == T_BYTE) {
8906 addptr(to, 2);
8907 BIND(L_fill_byte);
8908 // fill trailing byte
8909 testl(count, 1);
8910 jccb(Assembler::zero, L_exit);
8911 movb(Address(to, 0), value);
8912 } else {
8913 BIND(L_fill_byte);
8914 }
8915 } else {
8916 BIND(L_fill_2_bytes);
8917 }
8918 BIND(L_exit);
8919 }
8920
8921 // encode char[] to byte[] in ISO_8859_1
8922 //@HotSpotIntrinsicCandidate
8923 //private static int implEncodeISOArray(byte[] sa, int sp,
8924 //byte[] da, int dp, int len) {
8925 // int i = 0;
8926 // for (; i < len; i++) {
8927 // char c = StringUTF16.getChar(sa, sp++);
8928 // if (c > '\u00FF')
8929 // break;
8930 // da[dp++] = (byte)c;
8931 // }
8932 // return i;
8933 //}
8934 void MacroAssembler::encode_iso_array(Register src, Register dst, Register len,
8935 XMMRegister tmp1Reg, XMMRegister tmp2Reg,
8936 XMMRegister tmp3Reg, XMMRegister tmp4Reg,
8937 Register tmp5, Register result) {
8938
8939 // rsi: src
8940 // rdi: dst
8941 // rdx: len
8942 // rcx: tmp5
8943 // rax: result
8944 ShortBranchVerifier sbv(this);
8945 assert_different_registers(src, dst, len, tmp5, result);
8946 Label L_done, L_copy_1_char, L_copy_1_char_exit;
8947
8948 // set result
8949 xorl(result, result);
8950 // check for zero length
8951 testl(len, len);
8952 jcc(Assembler::zero, L_done);
8953
8954 movl(result, len);
8955
8956 // Setup pointers
8957 lea(src, Address(src, len, Address::times_2)); // char[]
8958 lea(dst, Address(dst, len, Address::times_1)); // byte[]
8959 negptr(len);
8960
8961 if (UseSSE42Intrinsics || UseAVX >= 2) {
8962 Label L_chars_8_check, L_copy_8_chars, L_copy_8_chars_exit;
8963 Label L_chars_16_check, L_copy_16_chars, L_copy_16_chars_exit;
8964
8965 if (UseAVX >= 2) {
8966 Label L_chars_32_check, L_copy_32_chars, L_copy_32_chars_exit;
8967 movl(tmp5, 0xff00ff00); // create mask to test for Unicode chars in vector
8968 movdl(tmp1Reg, tmp5);
8969 vpbroadcastd(tmp1Reg, tmp1Reg);
8970 jmp(L_chars_32_check);
8971
8972 bind(L_copy_32_chars);
8973 vmovdqu(tmp3Reg, Address(src, len, Address::times_2, -64));
8974 vmovdqu(tmp4Reg, Address(src, len, Address::times_2, -32));
8975 vpor(tmp2Reg, tmp3Reg, tmp4Reg, /* vector_len */ 1);
8976 vptest(tmp2Reg, tmp1Reg); // check for Unicode chars in vector
8977 jccb(Assembler::notZero, L_copy_32_chars_exit);
8978 vpackuswb(tmp3Reg, tmp3Reg, tmp4Reg, /* vector_len */ 1);
8979 vpermq(tmp4Reg, tmp3Reg, 0xD8, /* vector_len */ 1);
8980 vmovdqu(Address(dst, len, Address::times_1, -32), tmp4Reg);
8981
8982 bind(L_chars_32_check);
8983 addptr(len, 32);
8984 jcc(Assembler::lessEqual, L_copy_32_chars);
8985
8986 bind(L_copy_32_chars_exit);
8987 subptr(len, 16);
8988 jccb(Assembler::greater, L_copy_16_chars_exit);
8989
8990 } else if (UseSSE42Intrinsics) {
8991 movl(tmp5, 0xff00ff00); // create mask to test for Unicode chars in vector
8992 movdl(tmp1Reg, tmp5);
8993 pshufd(tmp1Reg, tmp1Reg, 0);
8994 jmpb(L_chars_16_check);
8995 }
8996
8997 bind(L_copy_16_chars);
8998 if (UseAVX >= 2) {
8999 vmovdqu(tmp2Reg, Address(src, len, Address::times_2, -32));
9000 vptest(tmp2Reg, tmp1Reg);
9001 jcc(Assembler::notZero, L_copy_16_chars_exit);
9002 vpackuswb(tmp2Reg, tmp2Reg, tmp1Reg, /* vector_len */ 1);
9003 vpermq(tmp3Reg, tmp2Reg, 0xD8, /* vector_len */ 1);
9004 } else {
9005 if (UseAVX > 0) {
9006 movdqu(tmp3Reg, Address(src, len, Address::times_2, -32));
9007 movdqu(tmp4Reg, Address(src, len, Address::times_2, -16));
9008 vpor(tmp2Reg, tmp3Reg, tmp4Reg, /* vector_len */ 0);
9009 } else {
9010 movdqu(tmp3Reg, Address(src, len, Address::times_2, -32));
9011 por(tmp2Reg, tmp3Reg);
9012 movdqu(tmp4Reg, Address(src, len, Address::times_2, -16));
9013 por(tmp2Reg, tmp4Reg);
9014 }
9015 ptest(tmp2Reg, tmp1Reg); // check for Unicode chars in vector
9016 jccb(Assembler::notZero, L_copy_16_chars_exit);
9017 packuswb(tmp3Reg, tmp4Reg);
9018 }
9019 movdqu(Address(dst, len, Address::times_1, -16), tmp3Reg);
9020
9021 bind(L_chars_16_check);
9022 addptr(len, 16);
9023 jcc(Assembler::lessEqual, L_copy_16_chars);
9024
9025 bind(L_copy_16_chars_exit);
9026 if (UseAVX >= 2) {
9027 // clean upper bits of YMM registers
9028 vpxor(tmp2Reg, tmp2Reg);
9029 vpxor(tmp3Reg, tmp3Reg);
9030 vpxor(tmp4Reg, tmp4Reg);
9031 movdl(tmp1Reg, tmp5);
9032 pshufd(tmp1Reg, tmp1Reg, 0);
9033 }
9034 subptr(len, 8);
9035 jccb(Assembler::greater, L_copy_8_chars_exit);
9036
9037 bind(L_copy_8_chars);
9038 movdqu(tmp3Reg, Address(src, len, Address::times_2, -16));
9039 ptest(tmp3Reg, tmp1Reg);
9040 jccb(Assembler::notZero, L_copy_8_chars_exit);
9041 packuswb(tmp3Reg, tmp1Reg);
9042 movq(Address(dst, len, Address::times_1, -8), tmp3Reg);
9043 addptr(len, 8);
9044 jccb(Assembler::lessEqual, L_copy_8_chars);
9045
9046 bind(L_copy_8_chars_exit);
9047 subptr(len, 8);
9048 jccb(Assembler::zero, L_done);
9049 }
9050
9051 bind(L_copy_1_char);
9052 load_unsigned_short(tmp5, Address(src, len, Address::times_2, 0));
9053 testl(tmp5, 0xff00); // check if Unicode char
9054 jccb(Assembler::notZero, L_copy_1_char_exit);
9055 movb(Address(dst, len, Address::times_1, 0), tmp5);
9056 addptr(len, 1);
9057 jccb(Assembler::less, L_copy_1_char);
9058
9059 bind(L_copy_1_char_exit);
9060 addptr(result, len); // len is negative count of not processed elements
9061
9062 bind(L_done);
9063 }
9064
9065 #ifdef _LP64
9066 /**
9067 * Helper for multiply_to_len().
9068 */
9069 void MacroAssembler::add2_with_carry(Register dest_hi, Register dest_lo, Register src1, Register src2) {
9070 addq(dest_lo, src1);
9071 adcq(dest_hi, 0);
9072 addq(dest_lo, src2);
9073 adcq(dest_hi, 0);
9074 }
9075
9076 /**
9077 * Multiply 64 bit by 64 bit first loop.
9078 */
9079 void MacroAssembler::multiply_64_x_64_loop(Register x, Register xstart, Register x_xstart,
9080 Register y, Register y_idx, Register z,
9081 Register carry, Register product,
9082 Register idx, Register kdx) {
9083 //
9084 // jlong carry, x[], y[], z[];
9085 // for (int idx=ystart, kdx=ystart+1+xstart; idx >= 0; idx-, kdx--) {
9086 // huge_128 product = y[idx] * x[xstart] + carry;
9087 // z[kdx] = (jlong)product;
9088 // carry = (jlong)(product >>> 64);
9089 // }
9090 // z[xstart] = carry;
9091 //
9092
9093 Label L_first_loop, L_first_loop_exit;
9094 Label L_one_x, L_one_y, L_multiply;
9095
9096 decrementl(xstart);
9097 jcc(Assembler::negative, L_one_x);
9098
9099 movq(x_xstart, Address(x, xstart, Address::times_4, 0));
9100 rorq(x_xstart, 32); // convert big-endian to little-endian
9101
9102 bind(L_first_loop);
9103 decrementl(idx);
9104 jcc(Assembler::negative, L_first_loop_exit);
9105 decrementl(idx);
9106 jcc(Assembler::negative, L_one_y);
9107 movq(y_idx, Address(y, idx, Address::times_4, 0));
9108 rorq(y_idx, 32); // convert big-endian to little-endian
9109 bind(L_multiply);
9110 movq(product, x_xstart);
9111 mulq(y_idx); // product(rax) * y_idx -> rdx:rax
9112 addq(product, carry);
9113 adcq(rdx, 0);
9114 subl(kdx, 2);
9115 movl(Address(z, kdx, Address::times_4, 4), product);
9116 shrq(product, 32);
9117 movl(Address(z, kdx, Address::times_4, 0), product);
9118 movq(carry, rdx);
9119 jmp(L_first_loop);
9120
9121 bind(L_one_y);
9122 movl(y_idx, Address(y, 0));
9123 jmp(L_multiply);
9124
9125 bind(L_one_x);
9126 movl(x_xstart, Address(x, 0));
9127 jmp(L_first_loop);
9128
9129 bind(L_first_loop_exit);
9130 }
9131
9132 /**
9133 * Multiply 64 bit by 64 bit and add 128 bit.
9134 */
9135 void MacroAssembler::multiply_add_128_x_128(Register x_xstart, Register y, Register z,
9136 Register yz_idx, Register idx,
9137 Register carry, Register product, int offset) {
9138 // huge_128 product = (y[idx] * x_xstart) + z[kdx] + carry;
9139 // z[kdx] = (jlong)product;
9140
9141 movq(yz_idx, Address(y, idx, Address::times_4, offset));
9142 rorq(yz_idx, 32); // convert big-endian to little-endian
9143 movq(product, x_xstart);
9144 mulq(yz_idx); // product(rax) * yz_idx -> rdx:product(rax)
9145 movq(yz_idx, Address(z, idx, Address::times_4, offset));
9146 rorq(yz_idx, 32); // convert big-endian to little-endian
9147
9148 add2_with_carry(rdx, product, carry, yz_idx);
9149
9150 movl(Address(z, idx, Address::times_4, offset+4), product);
9151 shrq(product, 32);
9152 movl(Address(z, idx, Address::times_4, offset), product);
9153
9154 }
9155
9156 /**
9157 * Multiply 128 bit by 128 bit. Unrolled inner loop.
9158 */
9159 void MacroAssembler::multiply_128_x_128_loop(Register x_xstart, Register y, Register z,
9160 Register yz_idx, Register idx, Register jdx,
9161 Register carry, Register product,
9162 Register carry2) {
9163 // jlong carry, x[], y[], z[];
9164 // int kdx = ystart+1;
9165 // for (int idx=ystart-2; idx >= 0; idx -= 2) { // Third loop
9166 // huge_128 product = (y[idx+1] * x_xstart) + z[kdx+idx+1] + carry;
9167 // z[kdx+idx+1] = (jlong)product;
9168 // jlong carry2 = (jlong)(product >>> 64);
9169 // product = (y[idx] * x_xstart) + z[kdx+idx] + carry2;
9170 // z[kdx+idx] = (jlong)product;
9171 // carry = (jlong)(product >>> 64);
9172 // }
9173 // idx += 2;
9174 // if (idx > 0) {
9175 // product = (y[idx] * x_xstart) + z[kdx+idx] + carry;
9176 // z[kdx+idx] = (jlong)product;
9177 // carry = (jlong)(product >>> 64);
9178 // }
9179 //
9180
9181 Label L_third_loop, L_third_loop_exit, L_post_third_loop_done;
9182
9183 movl(jdx, idx);
9184 andl(jdx, 0xFFFFFFFC);
9185 shrl(jdx, 2);
9186
9187 bind(L_third_loop);
9188 subl(jdx, 1);
9189 jcc(Assembler::negative, L_third_loop_exit);
9190 subl(idx, 4);
9191
9192 multiply_add_128_x_128(x_xstart, y, z, yz_idx, idx, carry, product, 8);
9193 movq(carry2, rdx);
9194
9195 multiply_add_128_x_128(x_xstart, y, z, yz_idx, idx, carry2, product, 0);
9196 movq(carry, rdx);
9197 jmp(L_third_loop);
9198
9199 bind (L_third_loop_exit);
9200
9201 andl (idx, 0x3);
9202 jcc(Assembler::zero, L_post_third_loop_done);
9203
9204 Label L_check_1;
9205 subl(idx, 2);
9206 jcc(Assembler::negative, L_check_1);
9207
9208 multiply_add_128_x_128(x_xstart, y, z, yz_idx, idx, carry, product, 0);
9209 movq(carry, rdx);
9210
9211 bind (L_check_1);
9212 addl (idx, 0x2);
9213 andl (idx, 0x1);
9214 subl(idx, 1);
9215 jcc(Assembler::negative, L_post_third_loop_done);
9216
9217 movl(yz_idx, Address(y, idx, Address::times_4, 0));
9218 movq(product, x_xstart);
9219 mulq(yz_idx); // product(rax) * yz_idx -> rdx:product(rax)
9220 movl(yz_idx, Address(z, idx, Address::times_4, 0));
9221
9222 add2_with_carry(rdx, product, yz_idx, carry);
9223
9224 movl(Address(z, idx, Address::times_4, 0), product);
9225 shrq(product, 32);
9226
9227 shlq(rdx, 32);
9228 orq(product, rdx);
9229 movq(carry, product);
9230
9231 bind(L_post_third_loop_done);
9232 }
9233
9234 /**
9235 * Multiply 128 bit by 128 bit using BMI2. Unrolled inner loop.
9236 *
9237 */
9238 void MacroAssembler::multiply_128_x_128_bmi2_loop(Register y, Register z,
9239 Register carry, Register carry2,
9240 Register idx, Register jdx,
9241 Register yz_idx1, Register yz_idx2,
9242 Register tmp, Register tmp3, Register tmp4) {
9243 assert(UseBMI2Instructions, "should be used only when BMI2 is available");
9244
9245 // jlong carry, x[], y[], z[];
9246 // int kdx = ystart+1;
9247 // for (int idx=ystart-2; idx >= 0; idx -= 2) { // Third loop
9248 // huge_128 tmp3 = (y[idx+1] * rdx) + z[kdx+idx+1] + carry;
9249 // jlong carry2 = (jlong)(tmp3 >>> 64);
9250 // huge_128 tmp4 = (y[idx] * rdx) + z[kdx+idx] + carry2;
9251 // carry = (jlong)(tmp4 >>> 64);
9252 // z[kdx+idx+1] = (jlong)tmp3;
9253 // z[kdx+idx] = (jlong)tmp4;
9254 // }
9255 // idx += 2;
9256 // if (idx > 0) {
9257 // yz_idx1 = (y[idx] * rdx) + z[kdx+idx] + carry;
9258 // z[kdx+idx] = (jlong)yz_idx1;
9259 // carry = (jlong)(yz_idx1 >>> 64);
9260 // }
9261 //
9262
9263 Label L_third_loop, L_third_loop_exit, L_post_third_loop_done;
9264
9265 movl(jdx, idx);
9266 andl(jdx, 0xFFFFFFFC);
9267 shrl(jdx, 2);
9268
9269 bind(L_third_loop);
9270 subl(jdx, 1);
9271 jcc(Assembler::negative, L_third_loop_exit);
9272 subl(idx, 4);
9273
9274 movq(yz_idx1, Address(y, idx, Address::times_4, 8));
9275 rorxq(yz_idx1, yz_idx1, 32); // convert big-endian to little-endian
9276 movq(yz_idx2, Address(y, idx, Address::times_4, 0));
9277 rorxq(yz_idx2, yz_idx2, 32);
9278
9279 mulxq(tmp4, tmp3, yz_idx1); // yz_idx1 * rdx -> tmp4:tmp3
9280 mulxq(carry2, tmp, yz_idx2); // yz_idx2 * rdx -> carry2:tmp
9281
9282 movq(yz_idx1, Address(z, idx, Address::times_4, 8));
9283 rorxq(yz_idx1, yz_idx1, 32);
9284 movq(yz_idx2, Address(z, idx, Address::times_4, 0));
9285 rorxq(yz_idx2, yz_idx2, 32);
9286
9287 if (VM_Version::supports_adx()) {
9288 adcxq(tmp3, carry);
9289 adoxq(tmp3, yz_idx1);
9290
9291 adcxq(tmp4, tmp);
9292 adoxq(tmp4, yz_idx2);
9293
9294 movl(carry, 0); // does not affect flags
9295 adcxq(carry2, carry);
9296 adoxq(carry2, carry);
9297 } else {
9298 add2_with_carry(tmp4, tmp3, carry, yz_idx1);
9299 add2_with_carry(carry2, tmp4, tmp, yz_idx2);
9300 }
9301 movq(carry, carry2);
9302
9303 movl(Address(z, idx, Address::times_4, 12), tmp3);
9304 shrq(tmp3, 32);
9305 movl(Address(z, idx, Address::times_4, 8), tmp3);
9306
9307 movl(Address(z, idx, Address::times_4, 4), tmp4);
9308 shrq(tmp4, 32);
9309 movl(Address(z, idx, Address::times_4, 0), tmp4);
9310
9311 jmp(L_third_loop);
9312
9313 bind (L_third_loop_exit);
9314
9315 andl (idx, 0x3);
9316 jcc(Assembler::zero, L_post_third_loop_done);
9317
9318 Label L_check_1;
9319 subl(idx, 2);
9320 jcc(Assembler::negative, L_check_1);
9321
9322 movq(yz_idx1, Address(y, idx, Address::times_4, 0));
9323 rorxq(yz_idx1, yz_idx1, 32);
9324 mulxq(tmp4, tmp3, yz_idx1); // yz_idx1 * rdx -> tmp4:tmp3
9325 movq(yz_idx2, Address(z, idx, Address::times_4, 0));
9326 rorxq(yz_idx2, yz_idx2, 32);
9327
9328 add2_with_carry(tmp4, tmp3, carry, yz_idx2);
9329
9330 movl(Address(z, idx, Address::times_4, 4), tmp3);
9331 shrq(tmp3, 32);
9332 movl(Address(z, idx, Address::times_4, 0), tmp3);
9333 movq(carry, tmp4);
9334
9335 bind (L_check_1);
9336 addl (idx, 0x2);
9337 andl (idx, 0x1);
9338 subl(idx, 1);
9339 jcc(Assembler::negative, L_post_third_loop_done);
9340 movl(tmp4, Address(y, idx, Address::times_4, 0));
9341 mulxq(carry2, tmp3, tmp4); // tmp4 * rdx -> carry2:tmp3
9342 movl(tmp4, Address(z, idx, Address::times_4, 0));
9343
9344 add2_with_carry(carry2, tmp3, tmp4, carry);
9345
9346 movl(Address(z, idx, Address::times_4, 0), tmp3);
9347 shrq(tmp3, 32);
9348
9349 shlq(carry2, 32);
9350 orq(tmp3, carry2);
9351 movq(carry, tmp3);
9352
9353 bind(L_post_third_loop_done);
9354 }
9355
9356 /**
9357 * Code for BigInteger::multiplyToLen() instrinsic.
9358 *
9359 * rdi: x
9360 * rax: xlen
9361 * rsi: y
9362 * rcx: ylen
9363 * r8: z
9364 * r11: zlen
9365 * r12: tmp1
9366 * r13: tmp2
9367 * r14: tmp3
9368 * r15: tmp4
9369 * rbx: tmp5
9370 *
9371 */
9372 void MacroAssembler::multiply_to_len(Register x, Register xlen, Register y, Register ylen, Register z, Register zlen,
9373 Register tmp1, Register tmp2, Register tmp3, Register tmp4, Register tmp5) {
9374 ShortBranchVerifier sbv(this);
9375 assert_different_registers(x, xlen, y, ylen, z, zlen, tmp1, tmp2, tmp3, tmp4, tmp5, rdx);
9376
9377 push(tmp1);
9378 push(tmp2);
9379 push(tmp3);
9380 push(tmp4);
9381 push(tmp5);
9382
9383 push(xlen);
9384 push(zlen);
9385
9386 const Register idx = tmp1;
9387 const Register kdx = tmp2;
9388 const Register xstart = tmp3;
9389
9390 const Register y_idx = tmp4;
9391 const Register carry = tmp5;
9392 const Register product = xlen;
9393 const Register x_xstart = zlen; // reuse register
9394
9395 // First Loop.
9396 //
9397 // final static long LONG_MASK = 0xffffffffL;
9398 // int xstart = xlen - 1;
9399 // int ystart = ylen - 1;
9400 // long carry = 0;
9401 // for (int idx=ystart, kdx=ystart+1+xstart; idx >= 0; idx-, kdx--) {
9402 // long product = (y[idx] & LONG_MASK) * (x[xstart] & LONG_MASK) + carry;
9403 // z[kdx] = (int)product;
9404 // carry = product >>> 32;
9405 // }
9406 // z[xstart] = (int)carry;
9407 //
9408
9409 movl(idx, ylen); // idx = ylen;
9410 movl(kdx, zlen); // kdx = xlen+ylen;
9411 xorq(carry, carry); // carry = 0;
9412
9413 Label L_done;
9414
9415 movl(xstart, xlen);
9416 decrementl(xstart);
9417 jcc(Assembler::negative, L_done);
9418
9419 multiply_64_x_64_loop(x, xstart, x_xstart, y, y_idx, z, carry, product, idx, kdx);
9420
9421 Label L_second_loop;
9422 testl(kdx, kdx);
9423 jcc(Assembler::zero, L_second_loop);
9424
9425 Label L_carry;
9426 subl(kdx, 1);
9427 jcc(Assembler::zero, L_carry);
9428
9429 movl(Address(z, kdx, Address::times_4, 0), carry);
9430 shrq(carry, 32);
9431 subl(kdx, 1);
9432
9433 bind(L_carry);
9434 movl(Address(z, kdx, Address::times_4, 0), carry);
9435
9436 // Second and third (nested) loops.
9437 //
9438 // for (int i = xstart-1; i >= 0; i--) { // Second loop
9439 // carry = 0;
9440 // for (int jdx=ystart, k=ystart+1+i; jdx >= 0; jdx--, k--) { // Third loop
9441 // long product = (y[jdx] & LONG_MASK) * (x[i] & LONG_MASK) +
9442 // (z[k] & LONG_MASK) + carry;
9443 // z[k] = (int)product;
9444 // carry = product >>> 32;
9445 // }
9446 // z[i] = (int)carry;
9447 // }
9448 //
9449 // i = xlen, j = tmp1, k = tmp2, carry = tmp5, x[i] = rdx
9450
9451 const Register jdx = tmp1;
9452
9453 bind(L_second_loop);
9454 xorl(carry, carry); // carry = 0;
9455 movl(jdx, ylen); // j = ystart+1
9456
9457 subl(xstart, 1); // i = xstart-1;
9458 jcc(Assembler::negative, L_done);
9459
9460 push (z);
9461
9462 Label L_last_x;
9463 lea(z, Address(z, xstart, Address::times_4, 4)); // z = z + k - j
9464 subl(xstart, 1); // i = xstart-1;
9465 jcc(Assembler::negative, L_last_x);
9466
9467 if (UseBMI2Instructions) {
9468 movq(rdx, Address(x, xstart, Address::times_4, 0));
9469 rorxq(rdx, rdx, 32); // convert big-endian to little-endian
9470 } else {
9471 movq(x_xstart, Address(x, xstart, Address::times_4, 0));
9472 rorq(x_xstart, 32); // convert big-endian to little-endian
9473 }
9474
9475 Label L_third_loop_prologue;
9476 bind(L_third_loop_prologue);
9477
9478 push (x);
9479 push (xstart);
9480 push (ylen);
9481
9482
9483 if (UseBMI2Instructions) {
9484 multiply_128_x_128_bmi2_loop(y, z, carry, x, jdx, ylen, product, tmp2, x_xstart, tmp3, tmp4);
9485 } else { // !UseBMI2Instructions
9486 multiply_128_x_128_loop(x_xstart, y, z, y_idx, jdx, ylen, carry, product, x);
9487 }
9488
9489 pop(ylen);
9490 pop(xlen);
9491 pop(x);
9492 pop(z);
9493
9494 movl(tmp3, xlen);
9495 addl(tmp3, 1);
9496 movl(Address(z, tmp3, Address::times_4, 0), carry);
9497 subl(tmp3, 1);
9498 jccb(Assembler::negative, L_done);
9499
9500 shrq(carry, 32);
9501 movl(Address(z, tmp3, Address::times_4, 0), carry);
9502 jmp(L_second_loop);
9503
9504 // Next infrequent code is moved outside loops.
9505 bind(L_last_x);
9506 if (UseBMI2Instructions) {
9507 movl(rdx, Address(x, 0));
9508 } else {
9509 movl(x_xstart, Address(x, 0));
9510 }
9511 jmp(L_third_loop_prologue);
9512
9513 bind(L_done);
9514
9515 pop(zlen);
9516 pop(xlen);
9517
9518 pop(tmp5);
9519 pop(tmp4);
9520 pop(tmp3);
9521 pop(tmp2);
9522 pop(tmp1);
9523 }
9524
9525 void MacroAssembler::vectorized_mismatch(Register obja, Register objb, Register length, Register log2_array_indxscale,
9526 Register result, Register tmp1, Register tmp2, XMMRegister rymm0, XMMRegister rymm1, XMMRegister rymm2){
9527 assert(UseSSE42Intrinsics, "SSE4.2 must be enabled.");
9528 Label VECTOR64_LOOP, VECTOR64_TAIL, VECTOR64_NOT_EQUAL, VECTOR32_TAIL;
9529 Label VECTOR32_LOOP, VECTOR16_LOOP, VECTOR8_LOOP, VECTOR4_LOOP;
9530 Label VECTOR16_TAIL, VECTOR8_TAIL, VECTOR4_TAIL;
9531 Label VECTOR32_NOT_EQUAL, VECTOR16_NOT_EQUAL, VECTOR8_NOT_EQUAL, VECTOR4_NOT_EQUAL;
9532 Label SAME_TILL_END, DONE;
9533 Label BYTES_LOOP, BYTES_TAIL, BYTES_NOT_EQUAL;
9534
9535 //scale is in rcx in both Win64 and Unix
9536 ShortBranchVerifier sbv(this);
9537
9538 shlq(length);
9539 xorq(result, result);
9540
9541 if ((UseAVX > 2) &&
9542 VM_Version::supports_avx512vlbw()) {
9543 set_vector_masking(); // opening of the stub context for programming mask registers
9544 cmpq(length, 64);
9545 jcc(Assembler::less, VECTOR32_TAIL);
9546 movq(tmp1, length);
9547 andq(tmp1, 0x3F); // tail count
9548 andq(length, ~(0x3F)); //vector count
9549
9550 bind(VECTOR64_LOOP);
9551 // AVX512 code to compare 64 byte vectors.
9552 evmovdqub(rymm0, Address(obja, result), Assembler::AVX_512bit);
9553 evpcmpeqb(k7, rymm0, Address(objb, result), Assembler::AVX_512bit);
9554 kortestql(k7, k7);
9555 jcc(Assembler::aboveEqual, VECTOR64_NOT_EQUAL); // mismatch
9556 addq(result, 64);
9557 subq(length, 64);
9558 jccb(Assembler::notZero, VECTOR64_LOOP);
9559
9560 //bind(VECTOR64_TAIL);
9561 testq(tmp1, tmp1);
9562 jcc(Assembler::zero, SAME_TILL_END);
9563
9564 bind(VECTOR64_TAIL);
9565 // AVX512 code to compare upto 63 byte vectors.
9566 // Save k1
9567 kmovql(k3, k1);
9568 mov64(tmp2, 0xFFFFFFFFFFFFFFFF);
9569 shlxq(tmp2, tmp2, tmp1);
9570 notq(tmp2);
9571 kmovql(k1, tmp2);
9572
9573 evmovdqub(rymm0, k1, Address(obja, result), Assembler::AVX_512bit);
9574 evpcmpeqb(k7, k1, rymm0, Address(objb, result), Assembler::AVX_512bit);
9575
9576 ktestql(k7, k1);
9577 // Restore k1
9578 kmovql(k1, k3);
9579 jcc(Assembler::below, SAME_TILL_END); // not mismatch
9580
9581 bind(VECTOR64_NOT_EQUAL);
9582 kmovql(tmp1, k7);
9583 notq(tmp1);
9584 tzcntq(tmp1, tmp1);
9585 addq(result, tmp1);
9586 shrq(result);
9587 jmp(DONE);
9588 bind(VECTOR32_TAIL);
9589 clear_vector_masking(); // closing of the stub context for programming mask registers
9590 }
9591
9592 cmpq(length, 8);
9593 jcc(Assembler::equal, VECTOR8_LOOP);
9594 jcc(Assembler::less, VECTOR4_TAIL);
9595
9596 if (UseAVX >= 2) {
9597
9598 cmpq(length, 16);
9599 jcc(Assembler::equal, VECTOR16_LOOP);
9600 jcc(Assembler::less, VECTOR8_LOOP);
9601
9602 cmpq(length, 32);
9603 jccb(Assembler::less, VECTOR16_TAIL);
9604
9605 subq(length, 32);
9606 bind(VECTOR32_LOOP);
9607 vmovdqu(rymm0, Address(obja, result));
9608 vmovdqu(rymm1, Address(objb, result));
9609 vpxor(rymm2, rymm0, rymm1, Assembler::AVX_256bit);
9610 vptest(rymm2, rymm2);
9611 jcc(Assembler::notZero, VECTOR32_NOT_EQUAL);//mismatch found
9612 addq(result, 32);
9613 subq(length, 32);
9614 jccb(Assembler::greaterEqual, VECTOR32_LOOP);
9615 addq(length, 32);
9616 jcc(Assembler::equal, SAME_TILL_END);
9617 //falling through if less than 32 bytes left //close the branch here.
9618
9619 bind(VECTOR16_TAIL);
9620 cmpq(length, 16);
9621 jccb(Assembler::less, VECTOR8_TAIL);
9622 bind(VECTOR16_LOOP);
9623 movdqu(rymm0, Address(obja, result));
9624 movdqu(rymm1, Address(objb, result));
9625 vpxor(rymm2, rymm0, rymm1, Assembler::AVX_128bit);
9626 ptest(rymm2, rymm2);
9627 jcc(Assembler::notZero, VECTOR16_NOT_EQUAL);//mismatch found
9628 addq(result, 16);
9629 subq(length, 16);
9630 jcc(Assembler::equal, SAME_TILL_END);
9631 //falling through if less than 16 bytes left
9632 } else {//regular intrinsics
9633
9634 cmpq(length, 16);
9635 jccb(Assembler::less, VECTOR8_TAIL);
9636
9637 subq(length, 16);
9638 bind(VECTOR16_LOOP);
9639 movdqu(rymm0, Address(obja, result));
9640 movdqu(rymm1, Address(objb, result));
9641 pxor(rymm0, rymm1);
9642 ptest(rymm0, rymm0);
9643 jcc(Assembler::notZero, VECTOR16_NOT_EQUAL);//mismatch found
9644 addq(result, 16);
9645 subq(length, 16);
9646 jccb(Assembler::greaterEqual, VECTOR16_LOOP);
9647 addq(length, 16);
9648 jcc(Assembler::equal, SAME_TILL_END);
9649 //falling through if less than 16 bytes left
9650 }
9651
9652 bind(VECTOR8_TAIL);
9653 cmpq(length, 8);
9654 jccb(Assembler::less, VECTOR4_TAIL);
9655 bind(VECTOR8_LOOP);
9656 movq(tmp1, Address(obja, result));
9657 movq(tmp2, Address(objb, result));
9658 xorq(tmp1, tmp2);
9659 testq(tmp1, tmp1);
9660 jcc(Assembler::notZero, VECTOR8_NOT_EQUAL);//mismatch found
9661 addq(result, 8);
9662 subq(length, 8);
9663 jcc(Assembler::equal, SAME_TILL_END);
9664 //falling through if less than 8 bytes left
9665
9666 bind(VECTOR4_TAIL);
9667 cmpq(length, 4);
9668 jccb(Assembler::less, BYTES_TAIL);
9669 bind(VECTOR4_LOOP);
9670 movl(tmp1, Address(obja, result));
9671 xorl(tmp1, Address(objb, result));
9672 testl(tmp1, tmp1);
9673 jcc(Assembler::notZero, VECTOR4_NOT_EQUAL);//mismatch found
9674 addq(result, 4);
9675 subq(length, 4);
9676 jcc(Assembler::equal, SAME_TILL_END);
9677 //falling through if less than 4 bytes left
9678
9679 bind(BYTES_TAIL);
9680 bind(BYTES_LOOP);
9681 load_unsigned_byte(tmp1, Address(obja, result));
9682 load_unsigned_byte(tmp2, Address(objb, result));
9683 xorl(tmp1, tmp2);
9684 testl(tmp1, tmp1);
9685 jccb(Assembler::notZero, BYTES_NOT_EQUAL);//mismatch found
9686 decq(length);
9687 jccb(Assembler::zero, SAME_TILL_END);
9688 incq(result);
9689 load_unsigned_byte(tmp1, Address(obja, result));
9690 load_unsigned_byte(tmp2, Address(objb, result));
9691 xorl(tmp1, tmp2);
9692 testl(tmp1, tmp1);
9693 jccb(Assembler::notZero, BYTES_NOT_EQUAL);//mismatch found
9694 decq(length);
9695 jccb(Assembler::zero, SAME_TILL_END);
9696 incq(result);
9697 load_unsigned_byte(tmp1, Address(obja, result));
9698 load_unsigned_byte(tmp2, Address(objb, result));
9699 xorl(tmp1, tmp2);
9700 testl(tmp1, tmp1);
9701 jccb(Assembler::notZero, BYTES_NOT_EQUAL);//mismatch found
9702 jmpb(SAME_TILL_END);
9703
9704 if (UseAVX >= 2) {
9705 bind(VECTOR32_NOT_EQUAL);
9706 vpcmpeqb(rymm2, rymm2, rymm2, Assembler::AVX_256bit);
9707 vpcmpeqb(rymm0, rymm0, rymm1, Assembler::AVX_256bit);
9708 vpxor(rymm0, rymm0, rymm2, Assembler::AVX_256bit);
9709 vpmovmskb(tmp1, rymm0);
9710 bsfq(tmp1, tmp1);
9711 addq(result, tmp1);
9712 shrq(result);
9713 jmpb(DONE);
9714 }
9715
9716 bind(VECTOR16_NOT_EQUAL);
9717 if (UseAVX >= 2) {
9718 vpcmpeqb(rymm2, rymm2, rymm2, Assembler::AVX_128bit);
9719 vpcmpeqb(rymm0, rymm0, rymm1, Assembler::AVX_128bit);
9720 pxor(rymm0, rymm2);
9721 } else {
9722 pcmpeqb(rymm2, rymm2);
9723 pxor(rymm0, rymm1);
9724 pcmpeqb(rymm0, rymm1);
9725 pxor(rymm0, rymm2);
9726 }
9727 pmovmskb(tmp1, rymm0);
9728 bsfq(tmp1, tmp1);
9729 addq(result, tmp1);
9730 shrq(result);
9731 jmpb(DONE);
9732
9733 bind(VECTOR8_NOT_EQUAL);
9734 bind(VECTOR4_NOT_EQUAL);
9735 bsfq(tmp1, tmp1);
9736 shrq(tmp1, 3);
9737 addq(result, tmp1);
9738 bind(BYTES_NOT_EQUAL);
9739 shrq(result);
9740 jmpb(DONE);
9741
9742 bind(SAME_TILL_END);
9743 mov64(result, -1);
9744
9745 bind(DONE);
9746 }
9747
9748 //Helper functions for square_to_len()
9749
9750 /**
9751 * Store the squares of x[], right shifted one bit (divided by 2) into z[]
9752 * Preserves x and z and modifies rest of the registers.
9753 */
9754 void MacroAssembler::square_rshift(Register x, Register xlen, Register z, Register tmp1, Register tmp3, Register tmp4, Register tmp5, Register rdxReg, Register raxReg) {
9755 // Perform square and right shift by 1
9756 // Handle odd xlen case first, then for even xlen do the following
9757 // jlong carry = 0;
9758 // for (int j=0, i=0; j < xlen; j+=2, i+=4) {
9759 // huge_128 product = x[j:j+1] * x[j:j+1];
9760 // z[i:i+1] = (carry << 63) | (jlong)(product >>> 65);
9761 // z[i+2:i+3] = (jlong)(product >>> 1);
9762 // carry = (jlong)product;
9763 // }
9764
9765 xorq(tmp5, tmp5); // carry
9766 xorq(rdxReg, rdxReg);
9767 xorl(tmp1, tmp1); // index for x
9768 xorl(tmp4, tmp4); // index for z
9769
9770 Label L_first_loop, L_first_loop_exit;
9771
9772 testl(xlen, 1);
9773 jccb(Assembler::zero, L_first_loop); //jump if xlen is even
9774
9775 // Square and right shift by 1 the odd element using 32 bit multiply
9776 movl(raxReg, Address(x, tmp1, Address::times_4, 0));
9777 imulq(raxReg, raxReg);
9778 shrq(raxReg, 1);
9779 adcq(tmp5, 0);
9780 movq(Address(z, tmp4, Address::times_4, 0), raxReg);
9781 incrementl(tmp1);
9782 addl(tmp4, 2);
9783
9784 // Square and right shift by 1 the rest using 64 bit multiply
9785 bind(L_first_loop);
9786 cmpptr(tmp1, xlen);
9787 jccb(Assembler::equal, L_first_loop_exit);
9788
9789 // Square
9790 movq(raxReg, Address(x, tmp1, Address::times_4, 0));
9791 rorq(raxReg, 32); // convert big-endian to little-endian
9792 mulq(raxReg); // 64-bit multiply rax * rax -> rdx:rax
9793
9794 // Right shift by 1 and save carry
9795 shrq(tmp5, 1); // rdx:rax:tmp5 = (tmp5:rdx:rax) >>> 1
9796 rcrq(rdxReg, 1);
9797 rcrq(raxReg, 1);
9798 adcq(tmp5, 0);
9799
9800 // Store result in z
9801 movq(Address(z, tmp4, Address::times_4, 0), rdxReg);
9802 movq(Address(z, tmp4, Address::times_4, 8), raxReg);
9803
9804 // Update indices for x and z
9805 addl(tmp1, 2);
9806 addl(tmp4, 4);
9807 jmp(L_first_loop);
9808
9809 bind(L_first_loop_exit);
9810 }
9811
9812
9813 /**
9814 * Perform the following multiply add operation using BMI2 instructions
9815 * carry:sum = sum + op1*op2 + carry
9816 * op2 should be in rdx
9817 * op2 is preserved, all other registers are modified
9818 */
9819 void MacroAssembler::multiply_add_64_bmi2(Register sum, Register op1, Register op2, Register carry, Register tmp2) {
9820 // assert op2 is rdx
9821 mulxq(tmp2, op1, op1); // op1 * op2 -> tmp2:op1
9822 addq(sum, carry);
9823 adcq(tmp2, 0);
9824 addq(sum, op1);
9825 adcq(tmp2, 0);
9826 movq(carry, tmp2);
9827 }
9828
9829 /**
9830 * Perform the following multiply add operation:
9831 * carry:sum = sum + op1*op2 + carry
9832 * Preserves op1, op2 and modifies rest of registers
9833 */
9834 void MacroAssembler::multiply_add_64(Register sum, Register op1, Register op2, Register carry, Register rdxReg, Register raxReg) {
9835 // rdx:rax = op1 * op2
9836 movq(raxReg, op2);
9837 mulq(op1);
9838
9839 // rdx:rax = sum + carry + rdx:rax
9840 addq(sum, carry);
9841 adcq(rdxReg, 0);
9842 addq(sum, raxReg);
9843 adcq(rdxReg, 0);
9844
9845 // carry:sum = rdx:sum
9846 movq(carry, rdxReg);
9847 }
9848
9849 /**
9850 * Add 64 bit long carry into z[] with carry propogation.
9851 * Preserves z and carry register values and modifies rest of registers.
9852 *
9853 */
9854 void MacroAssembler::add_one_64(Register z, Register zlen, Register carry, Register tmp1) {
9855 Label L_fourth_loop, L_fourth_loop_exit;
9856
9857 movl(tmp1, 1);
9858 subl(zlen, 2);
9859 addq(Address(z, zlen, Address::times_4, 0), carry);
9860
9861 bind(L_fourth_loop);
9862 jccb(Assembler::carryClear, L_fourth_loop_exit);
9863 subl(zlen, 2);
9864 jccb(Assembler::negative, L_fourth_loop_exit);
9865 addq(Address(z, zlen, Address::times_4, 0), tmp1);
9866 jmp(L_fourth_loop);
9867 bind(L_fourth_loop_exit);
9868 }
9869
9870 /**
9871 * Shift z[] left by 1 bit.
9872 * Preserves x, len, z and zlen registers and modifies rest of the registers.
9873 *
9874 */
9875 void MacroAssembler::lshift_by_1(Register x, Register len, Register z, Register zlen, Register tmp1, Register tmp2, Register tmp3, Register tmp4) {
9876
9877 Label L_fifth_loop, L_fifth_loop_exit;
9878
9879 // Fifth loop
9880 // Perform primitiveLeftShift(z, zlen, 1)
9881
9882 const Register prev_carry = tmp1;
9883 const Register new_carry = tmp4;
9884 const Register value = tmp2;
9885 const Register zidx = tmp3;
9886
9887 // int zidx, carry;
9888 // long value;
9889 // carry = 0;
9890 // for (zidx = zlen-2; zidx >=0; zidx -= 2) {
9891 // (carry:value) = (z[i] << 1) | carry ;
9892 // z[i] = value;
9893 // }
9894
9895 movl(zidx, zlen);
9896 xorl(prev_carry, prev_carry); // clear carry flag and prev_carry register
9897
9898 bind(L_fifth_loop);
9899 decl(zidx); // Use decl to preserve carry flag
9900 decl(zidx);
9901 jccb(Assembler::negative, L_fifth_loop_exit);
9902
9903 if (UseBMI2Instructions) {
9904 movq(value, Address(z, zidx, Address::times_4, 0));
9905 rclq(value, 1);
9906 rorxq(value, value, 32);
9907 movq(Address(z, zidx, Address::times_4, 0), value); // Store back in big endian form
9908 }
9909 else {
9910 // clear new_carry
9911 xorl(new_carry, new_carry);
9912
9913 // Shift z[i] by 1, or in previous carry and save new carry
9914 movq(value, Address(z, zidx, Address::times_4, 0));
9915 shlq(value, 1);
9916 adcl(new_carry, 0);
9917
9918 orq(value, prev_carry);
9919 rorq(value, 0x20);
9920 movq(Address(z, zidx, Address::times_4, 0), value); // Store back in big endian form
9921
9922 // Set previous carry = new carry
9923 movl(prev_carry, new_carry);
9924 }
9925 jmp(L_fifth_loop);
9926
9927 bind(L_fifth_loop_exit);
9928 }
9929
9930
9931 /**
9932 * Code for BigInteger::squareToLen() intrinsic
9933 *
9934 * rdi: x
9935 * rsi: len
9936 * r8: z
9937 * rcx: zlen
9938 * r12: tmp1
9939 * r13: tmp2
9940 * r14: tmp3
9941 * r15: tmp4
9942 * rbx: tmp5
9943 *
9944 */
9945 void MacroAssembler::square_to_len(Register x, Register len, Register z, Register zlen, Register tmp1, Register tmp2, Register tmp3, Register tmp4, Register tmp5, Register rdxReg, Register raxReg) {
9946
9947 Label L_second_loop, L_second_loop_exit, L_third_loop, L_third_loop_exit, fifth_loop, fifth_loop_exit, L_last_x, L_multiply;
9948 push(tmp1);
9949 push(tmp2);
9950 push(tmp3);
9951 push(tmp4);
9952 push(tmp5);
9953
9954 // First loop
9955 // Store the squares, right shifted one bit (i.e., divided by 2).
9956 square_rshift(x, len, z, tmp1, tmp3, tmp4, tmp5, rdxReg, raxReg);
9957
9958 // Add in off-diagonal sums.
9959 //
9960 // Second, third (nested) and fourth loops.
9961 // zlen +=2;
9962 // for (int xidx=len-2,zidx=zlen-4; xidx > 0; xidx-=2,zidx-=4) {
9963 // carry = 0;
9964 // long op2 = x[xidx:xidx+1];
9965 // for (int j=xidx-2,k=zidx; j >= 0; j-=2) {
9966 // k -= 2;
9967 // long op1 = x[j:j+1];
9968 // long sum = z[k:k+1];
9969 // carry:sum = multiply_add_64(sum, op1, op2, carry, tmp_regs);
9970 // z[k:k+1] = sum;
9971 // }
9972 // add_one_64(z, k, carry, tmp_regs);
9973 // }
9974
9975 const Register carry = tmp5;
9976 const Register sum = tmp3;
9977 const Register op1 = tmp4;
9978 Register op2 = tmp2;
9979
9980 push(zlen);
9981 push(len);
9982 addl(zlen,2);
9983 bind(L_second_loop);
9984 xorq(carry, carry);
9985 subl(zlen, 4);
9986 subl(len, 2);
9987 push(zlen);
9988 push(len);
9989 cmpl(len, 0);
9990 jccb(Assembler::lessEqual, L_second_loop_exit);
9991
9992 // Multiply an array by one 64 bit long.
9993 if (UseBMI2Instructions) {
9994 op2 = rdxReg;
9995 movq(op2, Address(x, len, Address::times_4, 0));
9996 rorxq(op2, op2, 32);
9997 }
9998 else {
9999 movq(op2, Address(x, len, Address::times_4, 0));
10000 rorq(op2, 32);
10001 }
10002
10003 bind(L_third_loop);
10004 decrementl(len);
10005 jccb(Assembler::negative, L_third_loop_exit);
10006 decrementl(len);
10007 jccb(Assembler::negative, L_last_x);
10008
10009 movq(op1, Address(x, len, Address::times_4, 0));
10010 rorq(op1, 32);
10011
10012 bind(L_multiply);
10013 subl(zlen, 2);
10014 movq(sum, Address(z, zlen, Address::times_4, 0));
10015
10016 // Multiply 64 bit by 64 bit and add 64 bits lower half and upper 64 bits as carry.
10017 if (UseBMI2Instructions) {
10018 multiply_add_64_bmi2(sum, op1, op2, carry, tmp2);
10019 }
10020 else {
10021 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg);
10022 }
10023
10024 movq(Address(z, zlen, Address::times_4, 0), sum);
10025
10026 jmp(L_third_loop);
10027 bind(L_third_loop_exit);
10028
10029 // Fourth loop
10030 // Add 64 bit long carry into z with carry propogation.
10031 // Uses offsetted zlen.
10032 add_one_64(z, zlen, carry, tmp1);
10033
10034 pop(len);
10035 pop(zlen);
10036 jmp(L_second_loop);
10037
10038 // Next infrequent code is moved outside loops.
10039 bind(L_last_x);
10040 movl(op1, Address(x, 0));
10041 jmp(L_multiply);
10042
10043 bind(L_second_loop_exit);
10044 pop(len);
10045 pop(zlen);
10046 pop(len);
10047 pop(zlen);
10048
10049 // Fifth loop
10050 // Shift z left 1 bit.
10051 lshift_by_1(x, len, z, zlen, tmp1, tmp2, tmp3, tmp4);
10052
10053 // z[zlen-1] |= x[len-1] & 1;
10054 movl(tmp3, Address(x, len, Address::times_4, -4));
10055 andl(tmp3, 1);
10056 orl(Address(z, zlen, Address::times_4, -4), tmp3);
10057
10058 pop(tmp5);
10059 pop(tmp4);
10060 pop(tmp3);
10061 pop(tmp2);
10062 pop(tmp1);
10063 }
10064
10065 /**
10066 * Helper function for mul_add()
10067 * Multiply the in[] by int k and add to out[] starting at offset offs using
10068 * 128 bit by 32 bit multiply and return the carry in tmp5.
10069 * Only quad int aligned length of in[] is operated on in this function.
10070 * k is in rdxReg for BMI2Instructions, for others it is in tmp2.
10071 * This function preserves out, in and k registers.
10072 * len and offset point to the appropriate index in "in" & "out" correspondingly
10073 * tmp5 has the carry.
10074 * other registers are temporary and are modified.
10075 *
10076 */
10077 void MacroAssembler::mul_add_128_x_32_loop(Register out, Register in,
10078 Register offset, Register len, Register tmp1, Register tmp2, Register tmp3,
10079 Register tmp4, Register tmp5, Register rdxReg, Register raxReg) {
10080
10081 Label L_first_loop, L_first_loop_exit;
10082
10083 movl(tmp1, len);
10084 shrl(tmp1, 2);
10085
10086 bind(L_first_loop);
10087 subl(tmp1, 1);
10088 jccb(Assembler::negative, L_first_loop_exit);
10089
10090 subl(len, 4);
10091 subl(offset, 4);
10092
10093 Register op2 = tmp2;
10094 const Register sum = tmp3;
10095 const Register op1 = tmp4;
10096 const Register carry = tmp5;
10097
10098 if (UseBMI2Instructions) {
10099 op2 = rdxReg;
10100 }
10101
10102 movq(op1, Address(in, len, Address::times_4, 8));
10103 rorq(op1, 32);
10104 movq(sum, Address(out, offset, Address::times_4, 8));
10105 rorq(sum, 32);
10106 if (UseBMI2Instructions) {
10107 multiply_add_64_bmi2(sum, op1, op2, carry, raxReg);
10108 }
10109 else {
10110 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg);
10111 }
10112 // Store back in big endian from little endian
10113 rorq(sum, 0x20);
10114 movq(Address(out, offset, Address::times_4, 8), sum);
10115
10116 movq(op1, Address(in, len, Address::times_4, 0));
10117 rorq(op1, 32);
10118 movq(sum, Address(out, offset, Address::times_4, 0));
10119 rorq(sum, 32);
10120 if (UseBMI2Instructions) {
10121 multiply_add_64_bmi2(sum, op1, op2, carry, raxReg);
10122 }
10123 else {
10124 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg);
10125 }
10126 // Store back in big endian from little endian
10127 rorq(sum, 0x20);
10128 movq(Address(out, offset, Address::times_4, 0), sum);
10129
10130 jmp(L_first_loop);
10131 bind(L_first_loop_exit);
10132 }
10133
10134 /**
10135 * Code for BigInteger::mulAdd() intrinsic
10136 *
10137 * rdi: out
10138 * rsi: in
10139 * r11: offs (out.length - offset)
10140 * rcx: len
10141 * r8: k
10142 * r12: tmp1
10143 * r13: tmp2
10144 * r14: tmp3
10145 * r15: tmp4
10146 * rbx: tmp5
10147 * Multiply the in[] by word k and add to out[], return the carry in rax
10148 */
10149 void MacroAssembler::mul_add(Register out, Register in, Register offs,
10150 Register len, Register k, Register tmp1, Register tmp2, Register tmp3,
10151 Register tmp4, Register tmp5, Register rdxReg, Register raxReg) {
10152
10153 Label L_carry, L_last_in, L_done;
10154
10155 // carry = 0;
10156 // for (int j=len-1; j >= 0; j--) {
10157 // long product = (in[j] & LONG_MASK) * kLong +
10158 // (out[offs] & LONG_MASK) + carry;
10159 // out[offs--] = (int)product;
10160 // carry = product >>> 32;
10161 // }
10162 //
10163 push(tmp1);
10164 push(tmp2);
10165 push(tmp3);
10166 push(tmp4);
10167 push(tmp5);
10168
10169 Register op2 = tmp2;
10170 const Register sum = tmp3;
10171 const Register op1 = tmp4;
10172 const Register carry = tmp5;
10173
10174 if (UseBMI2Instructions) {
10175 op2 = rdxReg;
10176 movl(op2, k);
10177 }
10178 else {
10179 movl(op2, k);
10180 }
10181
10182 xorq(carry, carry);
10183
10184 //First loop
10185
10186 //Multiply in[] by k in a 4 way unrolled loop using 128 bit by 32 bit multiply
10187 //The carry is in tmp5
10188 mul_add_128_x_32_loop(out, in, offs, len, tmp1, tmp2, tmp3, tmp4, tmp5, rdxReg, raxReg);
10189
10190 //Multiply the trailing in[] entry using 64 bit by 32 bit, if any
10191 decrementl(len);
10192 jccb(Assembler::negative, L_carry);
10193 decrementl(len);
10194 jccb(Assembler::negative, L_last_in);
10195
10196 movq(op1, Address(in, len, Address::times_4, 0));
10197 rorq(op1, 32);
10198
10199 subl(offs, 2);
10200 movq(sum, Address(out, offs, Address::times_4, 0));
10201 rorq(sum, 32);
10202
10203 if (UseBMI2Instructions) {
10204 multiply_add_64_bmi2(sum, op1, op2, carry, raxReg);
10205 }
10206 else {
10207 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg);
10208 }
10209
10210 // Store back in big endian from little endian
10211 rorq(sum, 0x20);
10212 movq(Address(out, offs, Address::times_4, 0), sum);
10213
10214 testl(len, len);
10215 jccb(Assembler::zero, L_carry);
10216
10217 //Multiply the last in[] entry, if any
10218 bind(L_last_in);
10219 movl(op1, Address(in, 0));
10220 movl(sum, Address(out, offs, Address::times_4, -4));
10221
10222 movl(raxReg, k);
10223 mull(op1); //tmp4 * eax -> edx:eax
10224 addl(sum, carry);
10225 adcl(rdxReg, 0);
10226 addl(sum, raxReg);
10227 adcl(rdxReg, 0);
10228 movl(carry, rdxReg);
10229
10230 movl(Address(out, offs, Address::times_4, -4), sum);
10231
10232 bind(L_carry);
10233 //return tmp5/carry as carry in rax
10234 movl(rax, carry);
10235
10236 bind(L_done);
10237 pop(tmp5);
10238 pop(tmp4);
10239 pop(tmp3);
10240 pop(tmp2);
10241 pop(tmp1);
10242 }
10243 #endif
10244
10245 /**
10246 * Emits code to update CRC-32 with a byte value according to constants in table
10247 *
10248 * @param [in,out]crc Register containing the crc.
10249 * @param [in]val Register containing the byte to fold into the CRC.
10250 * @param [in]table Register containing the table of crc constants.
10251 *
10252 * uint32_t crc;
10253 * val = crc_table[(val ^ crc) & 0xFF];
10254 * crc = val ^ (crc >> 8);
10255 *
10256 */
10257 void MacroAssembler::update_byte_crc32(Register crc, Register val, Register table) {
10258 xorl(val, crc);
10259 andl(val, 0xFF);
10260 shrl(crc, 8); // unsigned shift
10261 xorl(crc, Address(table, val, Address::times_4, 0));
10262 }
10263
10264 /**
10265 * Fold 128-bit data chunk
10266 */
10267 void MacroAssembler::fold_128bit_crc32(XMMRegister xcrc, XMMRegister xK, XMMRegister xtmp, Register buf, int offset) {
10268 if (UseAVX > 0) {
10269 vpclmulhdq(xtmp, xK, xcrc); // [123:64]
10270 vpclmulldq(xcrc, xK, xcrc); // [63:0]
10271 vpxor(xcrc, xcrc, Address(buf, offset), 0 /* vector_len */);
10272 pxor(xcrc, xtmp);
10273 } else {
10274 movdqa(xtmp, xcrc);
10275 pclmulhdq(xtmp, xK); // [123:64]
10276 pclmulldq(xcrc, xK); // [63:0]
10277 pxor(xcrc, xtmp);
10278 movdqu(xtmp, Address(buf, offset));
10279 pxor(xcrc, xtmp);
10280 }
10281 }
10282
10283 void MacroAssembler::fold_128bit_crc32(XMMRegister xcrc, XMMRegister xK, XMMRegister xtmp, XMMRegister xbuf) {
10284 if (UseAVX > 0) {
10285 vpclmulhdq(xtmp, xK, xcrc);
10286 vpclmulldq(xcrc, xK, xcrc);
10287 pxor(xcrc, xbuf);
10288 pxor(xcrc, xtmp);
10289 } else {
10290 movdqa(xtmp, xcrc);
10291 pclmulhdq(xtmp, xK);
10292 pclmulldq(xcrc, xK);
10293 pxor(xcrc, xbuf);
10294 pxor(xcrc, xtmp);
10295 }
10296 }
10297
10298 /**
10299 * 8-bit folds to compute 32-bit CRC
10300 *
10301 * uint64_t xcrc;
10302 * timesXtoThe32[xcrc & 0xFF] ^ (xcrc >> 8);
10303 */
10304 void MacroAssembler::fold_8bit_crc32(XMMRegister xcrc, Register table, XMMRegister xtmp, Register tmp) {
10305 movdl(tmp, xcrc);
10306 andl(tmp, 0xFF);
10307 movdl(xtmp, Address(table, tmp, Address::times_4, 0));
10308 psrldq(xcrc, 1); // unsigned shift one byte
10309 pxor(xcrc, xtmp);
10310 }
10311
10312 /**
10313 * uint32_t crc;
10314 * timesXtoThe32[crc & 0xFF] ^ (crc >> 8);
10315 */
10316 void MacroAssembler::fold_8bit_crc32(Register crc, Register table, Register tmp) {
10317 movl(tmp, crc);
10318 andl(tmp, 0xFF);
10319 shrl(crc, 8);
10320 xorl(crc, Address(table, tmp, Address::times_4, 0));
10321 }
10322
10323 /**
10324 * @param crc register containing existing CRC (32-bit)
10325 * @param buf register pointing to input byte buffer (byte*)
10326 * @param len register containing number of bytes
10327 * @param table register that will contain address of CRC table
10328 * @param tmp scratch register
10329 */
10330 void MacroAssembler::kernel_crc32(Register crc, Register buf, Register len, Register table, Register tmp) {
10331 assert_different_registers(crc, buf, len, table, tmp, rax);
10332
10333 Label L_tail, L_tail_restore, L_tail_loop, L_exit, L_align_loop, L_aligned;
10334 Label L_fold_tail, L_fold_128b, L_fold_512b, L_fold_512b_loop, L_fold_tail_loop;
10335
10336 // For EVEX with VL and BW, provide a standard mask, VL = 128 will guide the merge
10337 // context for the registers used, where all instructions below are using 128-bit mode
10338 // On EVEX without VL and BW, these instructions will all be AVX.
10339 if (VM_Version::supports_avx512vlbw()) {
10340 movl(tmp, 0xffff);
10341 kmovwl(k1, tmp);
10342 }
10343
10344 lea(table, ExternalAddress(StubRoutines::crc_table_addr()));
10345 notl(crc); // ~crc
10346 cmpl(len, 16);
10347 jcc(Assembler::less, L_tail);
10348
10349 // Align buffer to 16 bytes
10350 movl(tmp, buf);
10351 andl(tmp, 0xF);
10352 jccb(Assembler::zero, L_aligned);
10353 subl(tmp, 16);
10354 addl(len, tmp);
10355
10356 align(4);
10357 BIND(L_align_loop);
10358 movsbl(rax, Address(buf, 0)); // load byte with sign extension
10359 update_byte_crc32(crc, rax, table);
10360 increment(buf);
10361 incrementl(tmp);
10362 jccb(Assembler::less, L_align_loop);
10363
10364 BIND(L_aligned);
10365 movl(tmp, len); // save
10366 shrl(len, 4);
10367 jcc(Assembler::zero, L_tail_restore);
10368
10369 // Fold crc into first bytes of vector
10370 movdqa(xmm1, Address(buf, 0));
10371 movdl(rax, xmm1);
10372 xorl(crc, rax);
10373 if (VM_Version::supports_sse4_1()) {
10374 pinsrd(xmm1, crc, 0);
10375 } else {
10376 pinsrw(xmm1, crc, 0);
10377 shrl(crc, 16);
10378 pinsrw(xmm1, crc, 1);
10379 }
10380 addptr(buf, 16);
10381 subl(len, 4); // len > 0
10382 jcc(Assembler::less, L_fold_tail);
10383
10384 movdqa(xmm2, Address(buf, 0));
10385 movdqa(xmm3, Address(buf, 16));
10386 movdqa(xmm4, Address(buf, 32));
10387 addptr(buf, 48);
10388 subl(len, 3);
10389 jcc(Assembler::lessEqual, L_fold_512b);
10390
10391 // Fold total 512 bits of polynomial on each iteration,
10392 // 128 bits per each of 4 parallel streams.
10393 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 32));
10394
10395 align(32);
10396 BIND(L_fold_512b_loop);
10397 fold_128bit_crc32(xmm1, xmm0, xmm5, buf, 0);
10398 fold_128bit_crc32(xmm2, xmm0, xmm5, buf, 16);
10399 fold_128bit_crc32(xmm3, xmm0, xmm5, buf, 32);
10400 fold_128bit_crc32(xmm4, xmm0, xmm5, buf, 48);
10401 addptr(buf, 64);
10402 subl(len, 4);
10403 jcc(Assembler::greater, L_fold_512b_loop);
10404
10405 // Fold 512 bits to 128 bits.
10406 BIND(L_fold_512b);
10407 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 16));
10408 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm2);
10409 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm3);
10410 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm4);
10411
10412 // Fold the rest of 128 bits data chunks
10413 BIND(L_fold_tail);
10414 addl(len, 3);
10415 jccb(Assembler::lessEqual, L_fold_128b);
10416 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 16));
10417
10418 BIND(L_fold_tail_loop);
10419 fold_128bit_crc32(xmm1, xmm0, xmm5, buf, 0);
10420 addptr(buf, 16);
10421 decrementl(len);
10422 jccb(Assembler::greater, L_fold_tail_loop);
10423
10424 // Fold 128 bits in xmm1 down into 32 bits in crc register.
10425 BIND(L_fold_128b);
10426 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr()));
10427 if (UseAVX > 0) {
10428 vpclmulqdq(xmm2, xmm0, xmm1, 0x1);
10429 vpand(xmm3, xmm0, xmm2, 0 /* vector_len */);
10430 vpclmulqdq(xmm0, xmm0, xmm3, 0x1);
10431 } else {
10432 movdqa(xmm2, xmm0);
10433 pclmulqdq(xmm2, xmm1, 0x1);
10434 movdqa(xmm3, xmm0);
10435 pand(xmm3, xmm2);
10436 pclmulqdq(xmm0, xmm3, 0x1);
10437 }
10438 psrldq(xmm1, 8);
10439 psrldq(xmm2, 4);
10440 pxor(xmm0, xmm1);
10441 pxor(xmm0, xmm2);
10442
10443 // 8 8-bit folds to compute 32-bit CRC.
10444 for (int j = 0; j < 4; j++) {
10445 fold_8bit_crc32(xmm0, table, xmm1, rax);
10446 }
10447 movdl(crc, xmm0); // mov 32 bits to general register
10448 for (int j = 0; j < 4; j++) {
10449 fold_8bit_crc32(crc, table, rax);
10450 }
10451
10452 BIND(L_tail_restore);
10453 movl(len, tmp); // restore
10454 BIND(L_tail);
10455 andl(len, 0xf);
10456 jccb(Assembler::zero, L_exit);
10457
10458 // Fold the rest of bytes
10459 align(4);
10460 BIND(L_tail_loop);
10461 movsbl(rax, Address(buf, 0)); // load byte with sign extension
10462 update_byte_crc32(crc, rax, table);
10463 increment(buf);
10464 decrementl(len);
10465 jccb(Assembler::greater, L_tail_loop);
10466
10467 BIND(L_exit);
10468 notl(crc); // ~c
10469 }
10470
10471 #ifdef _LP64
10472 // S. Gueron / Information Processing Letters 112 (2012) 184
10473 // Algorithm 4: Computing carry-less multiplication using a precomputed lookup table.
10474 // Input: A 32 bit value B = [byte3, byte2, byte1, byte0].
10475 // Output: the 64-bit carry-less product of B * CONST
10476 void MacroAssembler::crc32c_ipl_alg4(Register in, uint32_t n,
10477 Register tmp1, Register tmp2, Register tmp3) {
10478 lea(tmp3, ExternalAddress(StubRoutines::crc32c_table_addr()));
10479 if (n > 0) {
10480 addq(tmp3, n * 256 * 8);
10481 }
10482 // Q1 = TABLEExt[n][B & 0xFF];
10483 movl(tmp1, in);
10484 andl(tmp1, 0x000000FF);
10485 shll(tmp1, 3);
10486 addq(tmp1, tmp3);
10487 movq(tmp1, Address(tmp1, 0));
10488
10489 // Q2 = TABLEExt[n][B >> 8 & 0xFF];
10490 movl(tmp2, in);
10491 shrl(tmp2, 8);
10492 andl(tmp2, 0x000000FF);
10493 shll(tmp2, 3);
10494 addq(tmp2, tmp3);
10495 movq(tmp2, Address(tmp2, 0));
10496
10497 shlq(tmp2, 8);
10498 xorq(tmp1, tmp2);
10499
10500 // Q3 = TABLEExt[n][B >> 16 & 0xFF];
10501 movl(tmp2, in);
10502 shrl(tmp2, 16);
10503 andl(tmp2, 0x000000FF);
10504 shll(tmp2, 3);
10505 addq(tmp2, tmp3);
10506 movq(tmp2, Address(tmp2, 0));
10507
10508 shlq(tmp2, 16);
10509 xorq(tmp1, tmp2);
10510
10511 // Q4 = TABLEExt[n][B >> 24 & 0xFF];
10512 shrl(in, 24);
10513 andl(in, 0x000000FF);
10514 shll(in, 3);
10515 addq(in, tmp3);
10516 movq(in, Address(in, 0));
10517
10518 shlq(in, 24);
10519 xorq(in, tmp1);
10520 // return Q1 ^ Q2 << 8 ^ Q3 << 16 ^ Q4 << 24;
10521 }
10522
10523 void MacroAssembler::crc32c_pclmulqdq(XMMRegister w_xtmp1,
10524 Register in_out,
10525 uint32_t const_or_pre_comp_const_index, bool is_pclmulqdq_supported,
10526 XMMRegister w_xtmp2,
10527 Register tmp1,
10528 Register n_tmp2, Register n_tmp3) {
10529 if (is_pclmulqdq_supported) {
10530 movdl(w_xtmp1, in_out); // modified blindly
10531
10532 movl(tmp1, const_or_pre_comp_const_index);
10533 movdl(w_xtmp2, tmp1);
10534 pclmulqdq(w_xtmp1, w_xtmp2, 0);
10535
10536 movdq(in_out, w_xtmp1);
10537 } else {
10538 crc32c_ipl_alg4(in_out, const_or_pre_comp_const_index, tmp1, n_tmp2, n_tmp3);
10539 }
10540 }
10541
10542 // Recombination Alternative 2: No bit-reflections
10543 // T1 = (CRC_A * U1) << 1
10544 // T2 = (CRC_B * U2) << 1
10545 // C1 = T1 >> 32
10546 // C2 = T2 >> 32
10547 // T1 = T1 & 0xFFFFFFFF
10548 // T2 = T2 & 0xFFFFFFFF
10549 // T1 = CRC32(0, T1)
10550 // T2 = CRC32(0, T2)
10551 // C1 = C1 ^ T1
10552 // C2 = C2 ^ T2
10553 // CRC = C1 ^ C2 ^ CRC_C
10554 void MacroAssembler::crc32c_rec_alt2(uint32_t const_or_pre_comp_const_index_u1, uint32_t const_or_pre_comp_const_index_u2, bool is_pclmulqdq_supported, Register in_out, Register in1, Register in2,
10555 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3,
10556 Register tmp1, Register tmp2,
10557 Register n_tmp3) {
10558 crc32c_pclmulqdq(w_xtmp1, in_out, const_or_pre_comp_const_index_u1, is_pclmulqdq_supported, w_xtmp3, tmp1, tmp2, n_tmp3);
10559 crc32c_pclmulqdq(w_xtmp2, in1, const_or_pre_comp_const_index_u2, is_pclmulqdq_supported, w_xtmp3, tmp1, tmp2, n_tmp3);
10560 shlq(in_out, 1);
10561 movl(tmp1, in_out);
10562 shrq(in_out, 32);
10563 xorl(tmp2, tmp2);
10564 crc32(tmp2, tmp1, 4);
10565 xorl(in_out, tmp2); // we don't care about upper 32 bit contents here
10566 shlq(in1, 1);
10567 movl(tmp1, in1);
10568 shrq(in1, 32);
10569 xorl(tmp2, tmp2);
10570 crc32(tmp2, tmp1, 4);
10571 xorl(in1, tmp2);
10572 xorl(in_out, in1);
10573 xorl(in_out, in2);
10574 }
10575
10576 // Set N to predefined value
10577 // Subtract from a lenght of a buffer
10578 // execute in a loop:
10579 // CRC_A = 0xFFFFFFFF, CRC_B = 0, CRC_C = 0
10580 // for i = 1 to N do
10581 // CRC_A = CRC32(CRC_A, A[i])
10582 // CRC_B = CRC32(CRC_B, B[i])
10583 // CRC_C = CRC32(CRC_C, C[i])
10584 // end for
10585 // Recombine
10586 void MacroAssembler::crc32c_proc_chunk(uint32_t size, uint32_t const_or_pre_comp_const_index_u1, uint32_t const_or_pre_comp_const_index_u2, bool is_pclmulqdq_supported,
10587 Register in_out1, Register in_out2, Register in_out3,
10588 Register tmp1, Register tmp2, Register tmp3,
10589 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3,
10590 Register tmp4, Register tmp5,
10591 Register n_tmp6) {
10592 Label L_processPartitions;
10593 Label L_processPartition;
10594 Label L_exit;
10595
10596 bind(L_processPartitions);
10597 cmpl(in_out1, 3 * size);
10598 jcc(Assembler::less, L_exit);
10599 xorl(tmp1, tmp1);
10600 xorl(tmp2, tmp2);
10601 movq(tmp3, in_out2);
10602 addq(tmp3, size);
10603
10604 bind(L_processPartition);
10605 crc32(in_out3, Address(in_out2, 0), 8);
10606 crc32(tmp1, Address(in_out2, size), 8);
10607 crc32(tmp2, Address(in_out2, size * 2), 8);
10608 addq(in_out2, 8);
10609 cmpq(in_out2, tmp3);
10610 jcc(Assembler::less, L_processPartition);
10611 crc32c_rec_alt2(const_or_pre_comp_const_index_u1, const_or_pre_comp_const_index_u2, is_pclmulqdq_supported, in_out3, tmp1, tmp2,
10612 w_xtmp1, w_xtmp2, w_xtmp3,
10613 tmp4, tmp5,
10614 n_tmp6);
10615 addq(in_out2, 2 * size);
10616 subl(in_out1, 3 * size);
10617 jmp(L_processPartitions);
10618
10619 bind(L_exit);
10620 }
10621 #else
10622 void MacroAssembler::crc32c_ipl_alg4(Register in_out, uint32_t n,
10623 Register tmp1, Register tmp2, Register tmp3,
10624 XMMRegister xtmp1, XMMRegister xtmp2) {
10625 lea(tmp3, ExternalAddress(StubRoutines::crc32c_table_addr()));
10626 if (n > 0) {
10627 addl(tmp3, n * 256 * 8);
10628 }
10629 // Q1 = TABLEExt[n][B & 0xFF];
10630 movl(tmp1, in_out);
10631 andl(tmp1, 0x000000FF);
10632 shll(tmp1, 3);
10633 addl(tmp1, tmp3);
10634 movq(xtmp1, Address(tmp1, 0));
10635
10636 // Q2 = TABLEExt[n][B >> 8 & 0xFF];
10637 movl(tmp2, in_out);
10638 shrl(tmp2, 8);
10639 andl(tmp2, 0x000000FF);
10640 shll(tmp2, 3);
10641 addl(tmp2, tmp3);
10642 movq(xtmp2, Address(tmp2, 0));
10643
10644 psllq(xtmp2, 8);
10645 pxor(xtmp1, xtmp2);
10646
10647 // Q3 = TABLEExt[n][B >> 16 & 0xFF];
10648 movl(tmp2, in_out);
10649 shrl(tmp2, 16);
10650 andl(tmp2, 0x000000FF);
10651 shll(tmp2, 3);
10652 addl(tmp2, tmp3);
10653 movq(xtmp2, Address(tmp2, 0));
10654
10655 psllq(xtmp2, 16);
10656 pxor(xtmp1, xtmp2);
10657
10658 // Q4 = TABLEExt[n][B >> 24 & 0xFF];
10659 shrl(in_out, 24);
10660 andl(in_out, 0x000000FF);
10661 shll(in_out, 3);
10662 addl(in_out, tmp3);
10663 movq(xtmp2, Address(in_out, 0));
10664
10665 psllq(xtmp2, 24);
10666 pxor(xtmp1, xtmp2); // Result in CXMM
10667 // return Q1 ^ Q2 << 8 ^ Q3 << 16 ^ Q4 << 24;
10668 }
10669
10670 void MacroAssembler::crc32c_pclmulqdq(XMMRegister w_xtmp1,
10671 Register in_out,
10672 uint32_t const_or_pre_comp_const_index, bool is_pclmulqdq_supported,
10673 XMMRegister w_xtmp2,
10674 Register tmp1,
10675 Register n_tmp2, Register n_tmp3) {
10676 if (is_pclmulqdq_supported) {
10677 movdl(w_xtmp1, in_out);
10678
10679 movl(tmp1, const_or_pre_comp_const_index);
10680 movdl(w_xtmp2, tmp1);
10681 pclmulqdq(w_xtmp1, w_xtmp2, 0);
10682 // Keep result in XMM since GPR is 32 bit in length
10683 } else {
10684 crc32c_ipl_alg4(in_out, const_or_pre_comp_const_index, tmp1, n_tmp2, n_tmp3, w_xtmp1, w_xtmp2);
10685 }
10686 }
10687
10688 void MacroAssembler::crc32c_rec_alt2(uint32_t const_or_pre_comp_const_index_u1, uint32_t const_or_pre_comp_const_index_u2, bool is_pclmulqdq_supported, Register in_out, Register in1, Register in2,
10689 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3,
10690 Register tmp1, Register tmp2,
10691 Register n_tmp3) {
10692 crc32c_pclmulqdq(w_xtmp1, in_out, const_or_pre_comp_const_index_u1, is_pclmulqdq_supported, w_xtmp3, tmp1, tmp2, n_tmp3);
10693 crc32c_pclmulqdq(w_xtmp2, in1, const_or_pre_comp_const_index_u2, is_pclmulqdq_supported, w_xtmp3, tmp1, tmp2, n_tmp3);
10694
10695 psllq(w_xtmp1, 1);
10696 movdl(tmp1, w_xtmp1);
10697 psrlq(w_xtmp1, 32);
10698 movdl(in_out, w_xtmp1);
10699
10700 xorl(tmp2, tmp2);
10701 crc32(tmp2, tmp1, 4);
10702 xorl(in_out, tmp2);
10703
10704 psllq(w_xtmp2, 1);
10705 movdl(tmp1, w_xtmp2);
10706 psrlq(w_xtmp2, 32);
10707 movdl(in1, w_xtmp2);
10708
10709 xorl(tmp2, tmp2);
10710 crc32(tmp2, tmp1, 4);
10711 xorl(in1, tmp2);
10712 xorl(in_out, in1);
10713 xorl(in_out, in2);
10714 }
10715
10716 void MacroAssembler::crc32c_proc_chunk(uint32_t size, uint32_t const_or_pre_comp_const_index_u1, uint32_t const_or_pre_comp_const_index_u2, bool is_pclmulqdq_supported,
10717 Register in_out1, Register in_out2, Register in_out3,
10718 Register tmp1, Register tmp2, Register tmp3,
10719 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3,
10720 Register tmp4, Register tmp5,
10721 Register n_tmp6) {
10722 Label L_processPartitions;
10723 Label L_processPartition;
10724 Label L_exit;
10725
10726 bind(L_processPartitions);
10727 cmpl(in_out1, 3 * size);
10728 jcc(Assembler::less, L_exit);
10729 xorl(tmp1, tmp1);
10730 xorl(tmp2, tmp2);
10731 movl(tmp3, in_out2);
10732 addl(tmp3, size);
10733
10734 bind(L_processPartition);
10735 crc32(in_out3, Address(in_out2, 0), 4);
10736 crc32(tmp1, Address(in_out2, size), 4);
10737 crc32(tmp2, Address(in_out2, size*2), 4);
10738 crc32(in_out3, Address(in_out2, 0+4), 4);
10739 crc32(tmp1, Address(in_out2, size+4), 4);
10740 crc32(tmp2, Address(in_out2, size*2+4), 4);
10741 addl(in_out2, 8);
10742 cmpl(in_out2, tmp3);
10743 jcc(Assembler::less, L_processPartition);
10744
10745 push(tmp3);
10746 push(in_out1);
10747 push(in_out2);
10748 tmp4 = tmp3;
10749 tmp5 = in_out1;
10750 n_tmp6 = in_out2;
10751
10752 crc32c_rec_alt2(const_or_pre_comp_const_index_u1, const_or_pre_comp_const_index_u2, is_pclmulqdq_supported, in_out3, tmp1, tmp2,
10753 w_xtmp1, w_xtmp2, w_xtmp3,
10754 tmp4, tmp5,
10755 n_tmp6);
10756
10757 pop(in_out2);
10758 pop(in_out1);
10759 pop(tmp3);
10760
10761 addl(in_out2, 2 * size);
10762 subl(in_out1, 3 * size);
10763 jmp(L_processPartitions);
10764
10765 bind(L_exit);
10766 }
10767 #endif //LP64
10768
10769 #ifdef _LP64
10770 // Algorithm 2: Pipelined usage of the CRC32 instruction.
10771 // Input: A buffer I of L bytes.
10772 // Output: the CRC32C value of the buffer.
10773 // Notations:
10774 // Write L = 24N + r, with N = floor (L/24).
10775 // r = L mod 24 (0 <= r < 24).
10776 // Consider I as the concatenation of A|B|C|R, where A, B, C, each,
10777 // N quadwords, and R consists of r bytes.
10778 // A[j] = I [8j+7:8j], j= 0, 1, ..., N-1
10779 // B[j] = I [N + 8j+7:N + 8j], j= 0, 1, ..., N-1
10780 // C[j] = I [2N + 8j+7:2N + 8j], j= 0, 1, ..., N-1
10781 // if r > 0 R[j] = I [3N +j], j= 0, 1, ...,r-1
10782 void MacroAssembler::crc32c_ipl_alg2_alt2(Register in_out, Register in1, Register in2,
10783 Register tmp1, Register tmp2, Register tmp3,
10784 Register tmp4, Register tmp5, Register tmp6,
10785 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3,
10786 bool is_pclmulqdq_supported) {
10787 uint32_t const_or_pre_comp_const_index[CRC32C_NUM_PRECOMPUTED_CONSTANTS];
10788 Label L_wordByWord;
10789 Label L_byteByByteProlog;
10790 Label L_byteByByte;
10791 Label L_exit;
10792
10793 if (is_pclmulqdq_supported ) {
10794 const_or_pre_comp_const_index[1] = *(uint32_t *)StubRoutines::_crc32c_table_addr;
10795 const_or_pre_comp_const_index[0] = *((uint32_t *)StubRoutines::_crc32c_table_addr+1);
10796
10797 const_or_pre_comp_const_index[3] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 2);
10798 const_or_pre_comp_const_index[2] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 3);
10799
10800 const_or_pre_comp_const_index[5] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 4);
10801 const_or_pre_comp_const_index[4] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 5);
10802 assert((CRC32C_NUM_PRECOMPUTED_CONSTANTS - 1 ) == 5, "Checking whether you declared all of the constants based on the number of \"chunks\"");
10803 } else {
10804 const_or_pre_comp_const_index[0] = 1;
10805 const_or_pre_comp_const_index[1] = 0;
10806
10807 const_or_pre_comp_const_index[2] = 3;
10808 const_or_pre_comp_const_index[3] = 2;
10809
10810 const_or_pre_comp_const_index[4] = 5;
10811 const_or_pre_comp_const_index[5] = 4;
10812 }
10813 crc32c_proc_chunk(CRC32C_HIGH, const_or_pre_comp_const_index[0], const_or_pre_comp_const_index[1], is_pclmulqdq_supported,
10814 in2, in1, in_out,
10815 tmp1, tmp2, tmp3,
10816 w_xtmp1, w_xtmp2, w_xtmp3,
10817 tmp4, tmp5,
10818 tmp6);
10819 crc32c_proc_chunk(CRC32C_MIDDLE, const_or_pre_comp_const_index[2], const_or_pre_comp_const_index[3], is_pclmulqdq_supported,
10820 in2, in1, in_out,
10821 tmp1, tmp2, tmp3,
10822 w_xtmp1, w_xtmp2, w_xtmp3,
10823 tmp4, tmp5,
10824 tmp6);
10825 crc32c_proc_chunk(CRC32C_LOW, const_or_pre_comp_const_index[4], const_or_pre_comp_const_index[5], is_pclmulqdq_supported,
10826 in2, in1, in_out,
10827 tmp1, tmp2, tmp3,
10828 w_xtmp1, w_xtmp2, w_xtmp3,
10829 tmp4, tmp5,
10830 tmp6);
10831 movl(tmp1, in2);
10832 andl(tmp1, 0x00000007);
10833 negl(tmp1);
10834 addl(tmp1, in2);
10835 addq(tmp1, in1);
10836
10837 BIND(L_wordByWord);
10838 cmpq(in1, tmp1);
10839 jcc(Assembler::greaterEqual, L_byteByByteProlog);
10840 crc32(in_out, Address(in1, 0), 4);
10841 addq(in1, 4);
10842 jmp(L_wordByWord);
10843
10844 BIND(L_byteByByteProlog);
10845 andl(in2, 0x00000007);
10846 movl(tmp2, 1);
10847
10848 BIND(L_byteByByte);
10849 cmpl(tmp2, in2);
10850 jccb(Assembler::greater, L_exit);
10851 crc32(in_out, Address(in1, 0), 1);
10852 incq(in1);
10853 incl(tmp2);
10854 jmp(L_byteByByte);
10855
10856 BIND(L_exit);
10857 }
10858 #else
10859 void MacroAssembler::crc32c_ipl_alg2_alt2(Register in_out, Register in1, Register in2,
10860 Register tmp1, Register tmp2, Register tmp3,
10861 Register tmp4, Register tmp5, Register tmp6,
10862 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3,
10863 bool is_pclmulqdq_supported) {
10864 uint32_t const_or_pre_comp_const_index[CRC32C_NUM_PRECOMPUTED_CONSTANTS];
10865 Label L_wordByWord;
10866 Label L_byteByByteProlog;
10867 Label L_byteByByte;
10868 Label L_exit;
10869
10870 if (is_pclmulqdq_supported) {
10871 const_or_pre_comp_const_index[1] = *(uint32_t *)StubRoutines::_crc32c_table_addr;
10872 const_or_pre_comp_const_index[0] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 1);
10873
10874 const_or_pre_comp_const_index[3] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 2);
10875 const_or_pre_comp_const_index[2] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 3);
10876
10877 const_or_pre_comp_const_index[5] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 4);
10878 const_or_pre_comp_const_index[4] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 5);
10879 } else {
10880 const_or_pre_comp_const_index[0] = 1;
10881 const_or_pre_comp_const_index[1] = 0;
10882
10883 const_or_pre_comp_const_index[2] = 3;
10884 const_or_pre_comp_const_index[3] = 2;
10885
10886 const_or_pre_comp_const_index[4] = 5;
10887 const_or_pre_comp_const_index[5] = 4;
10888 }
10889 crc32c_proc_chunk(CRC32C_HIGH, const_or_pre_comp_const_index[0], const_or_pre_comp_const_index[1], is_pclmulqdq_supported,
10890 in2, in1, in_out,
10891 tmp1, tmp2, tmp3,
10892 w_xtmp1, w_xtmp2, w_xtmp3,
10893 tmp4, tmp5,
10894 tmp6);
10895 crc32c_proc_chunk(CRC32C_MIDDLE, const_or_pre_comp_const_index[2], const_or_pre_comp_const_index[3], is_pclmulqdq_supported,
10896 in2, in1, in_out,
10897 tmp1, tmp2, tmp3,
10898 w_xtmp1, w_xtmp2, w_xtmp3,
10899 tmp4, tmp5,
10900 tmp6);
10901 crc32c_proc_chunk(CRC32C_LOW, const_or_pre_comp_const_index[4], const_or_pre_comp_const_index[5], is_pclmulqdq_supported,
10902 in2, in1, in_out,
10903 tmp1, tmp2, tmp3,
10904 w_xtmp1, w_xtmp2, w_xtmp3,
10905 tmp4, tmp5,
10906 tmp6);
10907 movl(tmp1, in2);
10908 andl(tmp1, 0x00000007);
10909 negl(tmp1);
10910 addl(tmp1, in2);
10911 addl(tmp1, in1);
10912
10913 BIND(L_wordByWord);
10914 cmpl(in1, tmp1);
10915 jcc(Assembler::greaterEqual, L_byteByByteProlog);
10916 crc32(in_out, Address(in1,0), 4);
10917 addl(in1, 4);
10918 jmp(L_wordByWord);
10919
10920 BIND(L_byteByByteProlog);
10921 andl(in2, 0x00000007);
10922 movl(tmp2, 1);
10923
10924 BIND(L_byteByByte);
10925 cmpl(tmp2, in2);
10926 jccb(Assembler::greater, L_exit);
10927 movb(tmp1, Address(in1, 0));
10928 crc32(in_out, tmp1, 1);
10929 incl(in1);
10930 incl(tmp2);
10931 jmp(L_byteByByte);
10932
10933 BIND(L_exit);
10934 }
10935 #endif // LP64
10936 #undef BIND
10937 #undef BLOCK_COMMENT
10938
10939 // Compress char[] array to byte[].
10940 // ..\jdk\src\java.base\share\classes\java\lang\StringUTF16.java
10941 // @HotSpotIntrinsicCandidate
10942 // private static int compress(char[] src, int srcOff, byte[] dst, int dstOff, int len) {
10943 // for (int i = 0; i < len; i++) {
10944 // int c = src[srcOff++];
10945 // if (c >>> 8 != 0) {
10946 // return 0;
10947 // }
10948 // dst[dstOff++] = (byte)c;
10949 // }
10950 // return len;
10951 // }
10952 void MacroAssembler::char_array_compress(Register src, Register dst, Register len,
10953 XMMRegister tmp1Reg, XMMRegister tmp2Reg,
10954 XMMRegister tmp3Reg, XMMRegister tmp4Reg,
10955 Register tmp5, Register result) {
10956 Label copy_chars_loop, return_length, return_zero, done, below_threshold;
10957
10958 // rsi: src
10959 // rdi: dst
10960 // rdx: len
10961 // rcx: tmp5
10962 // rax: result
10963
10964 // rsi holds start addr of source char[] to be compressed
10965 // rdi holds start addr of destination byte[]
10966 // rdx holds length
10967
10968 assert(len != result, "");
10969
10970 // save length for return
10971 push(len);
10972
10973 if ((UseAVX > 2) && // AVX512
10974 VM_Version::supports_avx512vlbw() &&
10975 VM_Version::supports_bmi2()) {
10976
10977 set_vector_masking(); // opening of the stub context for programming mask registers
10978
10979 Label copy_32_loop, copy_loop_tail, restore_k1_return_zero;
10980
10981 // alignement
10982 Label post_alignement;
10983
10984 // if length of the string is less than 16, handle it in an old fashioned
10985 // way
10986 testl(len, -32);
10987 jcc(Assembler::zero, below_threshold);
10988
10989 // First check whether a character is compressable ( <= 0xFF).
10990 // Create mask to test for Unicode chars inside zmm vector
10991 movl(result, 0x00FF);
10992 evpbroadcastw(tmp2Reg, result, Assembler::AVX_512bit);
10993
10994 // Save k1
10995 kmovql(k3, k1);
10996
10997 testl(len, -64);
10998 jcc(Assembler::zero, post_alignement);
10999
11000 movl(tmp5, dst);
11001 andl(tmp5, (32 - 1));
11002 negl(tmp5);
11003 andl(tmp5, (32 - 1));
11004
11005 // bail out when there is nothing to be done
11006 testl(tmp5, 0xFFFFFFFF);
11007 jcc(Assembler::zero, post_alignement);
11008
11009 // ~(~0 << len), where len is the # of remaining elements to process
11010 movl(result, 0xFFFFFFFF);
11011 shlxl(result, result, tmp5);
11012 notl(result);
11013 kmovdl(k1, result);
11014
11015 evmovdquw(tmp1Reg, k1, Address(src, 0), Assembler::AVX_512bit);
11016 evpcmpuw(k2, k1, tmp1Reg, tmp2Reg, Assembler::le, Assembler::AVX_512bit);
11017 ktestd(k2, k1);
11018 jcc(Assembler::carryClear, restore_k1_return_zero);
11019
11020 evpmovwb(Address(dst, 0), k1, tmp1Reg, Assembler::AVX_512bit);
11021
11022 addptr(src, tmp5);
11023 addptr(src, tmp5);
11024 addptr(dst, tmp5);
11025 subl(len, tmp5);
11026
11027 bind(post_alignement);
11028 // end of alignement
11029
11030 movl(tmp5, len);
11031 andl(tmp5, (32 - 1)); // tail count (in chars)
11032 andl(len, ~(32 - 1)); // vector count (in chars)
11033 jcc(Assembler::zero, copy_loop_tail);
11034
11035 lea(src, Address(src, len, Address::times_2));
11036 lea(dst, Address(dst, len, Address::times_1));
11037 negptr(len);
11038
11039 bind(copy_32_loop);
11040 evmovdquw(tmp1Reg, Address(src, len, Address::times_2), Assembler::AVX_512bit);
11041 evpcmpuw(k2, tmp1Reg, tmp2Reg, Assembler::le, Assembler::AVX_512bit);
11042 kortestdl(k2, k2);
11043 jcc(Assembler::carryClear, restore_k1_return_zero);
11044
11045 // All elements in current processed chunk are valid candidates for
11046 // compression. Write a truncated byte elements to the memory.
11047 evpmovwb(Address(dst, len, Address::times_1), tmp1Reg, Assembler::AVX_512bit);
11048 addptr(len, 32);
11049 jcc(Assembler::notZero, copy_32_loop);
11050
11051 bind(copy_loop_tail);
11052 // bail out when there is nothing to be done
11053 testl(tmp5, 0xFFFFFFFF);
11054 // Restore k1
11055 kmovql(k1, k3);
11056 jcc(Assembler::zero, return_length);
11057
11058 movl(len, tmp5);
11059
11060 // ~(~0 << len), where len is the # of remaining elements to process
11061 movl(result, 0xFFFFFFFF);
11062 shlxl(result, result, len);
11063 notl(result);
11064
11065 kmovdl(k1, result);
11066
11067 evmovdquw(tmp1Reg, k1, Address(src, 0), Assembler::AVX_512bit);
11068 evpcmpuw(k2, k1, tmp1Reg, tmp2Reg, Assembler::le, Assembler::AVX_512bit);
11069 ktestd(k2, k1);
11070 jcc(Assembler::carryClear, restore_k1_return_zero);
11071
11072 evpmovwb(Address(dst, 0), k1, tmp1Reg, Assembler::AVX_512bit);
11073 // Restore k1
11074 kmovql(k1, k3);
11075 jmp(return_length);
11076
11077 bind(restore_k1_return_zero);
11078 // Restore k1
11079 kmovql(k1, k3);
11080 jmp(return_zero);
11081
11082 clear_vector_masking(); // closing of the stub context for programming mask registers
11083 }
11084 if (UseSSE42Intrinsics) {
11085 Label copy_32_loop, copy_16, copy_tail;
11086
11087 bind(below_threshold);
11088
11089 movl(result, len);
11090
11091 movl(tmp5, 0xff00ff00); // create mask to test for Unicode chars in vectors
11092
11093 // vectored compression
11094 andl(len, 0xfffffff0); // vector count (in chars)
11095 andl(result, 0x0000000f); // tail count (in chars)
11096 testl(len, len);
11097 jccb(Assembler::zero, copy_16);
11098
11099 // compress 16 chars per iter
11100 movdl(tmp1Reg, tmp5);
11101 pshufd(tmp1Reg, tmp1Reg, 0); // store Unicode mask in tmp1Reg
11102 pxor(tmp4Reg, tmp4Reg);
11103
11104 lea(src, Address(src, len, Address::times_2));
11105 lea(dst, Address(dst, len, Address::times_1));
11106 negptr(len);
11107
11108 bind(copy_32_loop);
11109 movdqu(tmp2Reg, Address(src, len, Address::times_2)); // load 1st 8 characters
11110 por(tmp4Reg, tmp2Reg);
11111 movdqu(tmp3Reg, Address(src, len, Address::times_2, 16)); // load next 8 characters
11112 por(tmp4Reg, tmp3Reg);
11113 ptest(tmp4Reg, tmp1Reg); // check for Unicode chars in next vector
11114 jcc(Assembler::notZero, return_zero);
11115 packuswb(tmp2Reg, tmp3Reg); // only ASCII chars; compress each to 1 byte
11116 movdqu(Address(dst, len, Address::times_1), tmp2Reg);
11117 addptr(len, 16);
11118 jcc(Assembler::notZero, copy_32_loop);
11119
11120 // compress next vector of 8 chars (if any)
11121 bind(copy_16);
11122 movl(len, result);
11123 andl(len, 0xfffffff8); // vector count (in chars)
11124 andl(result, 0x00000007); // tail count (in chars)
11125 testl(len, len);
11126 jccb(Assembler::zero, copy_tail);
11127
11128 movdl(tmp1Reg, tmp5);
11129 pshufd(tmp1Reg, tmp1Reg, 0); // store Unicode mask in tmp1Reg
11130 pxor(tmp3Reg, tmp3Reg);
11131
11132 movdqu(tmp2Reg, Address(src, 0));
11133 ptest(tmp2Reg, tmp1Reg); // check for Unicode chars in vector
11134 jccb(Assembler::notZero, return_zero);
11135 packuswb(tmp2Reg, tmp3Reg); // only LATIN1 chars; compress each to 1 byte
11136 movq(Address(dst, 0), tmp2Reg);
11137 addptr(src, 16);
11138 addptr(dst, 8);
11139
11140 bind(copy_tail);
11141 movl(len, result);
11142 }
11143 // compress 1 char per iter
11144 testl(len, len);
11145 jccb(Assembler::zero, return_length);
11146 lea(src, Address(src, len, Address::times_2));
11147 lea(dst, Address(dst, len, Address::times_1));
11148 negptr(len);
11149
11150 bind(copy_chars_loop);
11151 load_unsigned_short(result, Address(src, len, Address::times_2));
11152 testl(result, 0xff00); // check if Unicode char
11153 jccb(Assembler::notZero, return_zero);
11154 movb(Address(dst, len, Address::times_1), result); // ASCII char; compress to 1 byte
11155 increment(len);
11156 jcc(Assembler::notZero, copy_chars_loop);
11157
11158 // if compression succeeded, return length
11159 bind(return_length);
11160 pop(result);
11161 jmpb(done);
11162
11163 // if compression failed, return 0
11164 bind(return_zero);
11165 xorl(result, result);
11166 addptr(rsp, wordSize);
11167
11168 bind(done);
11169 }
11170
11171 // Inflate byte[] array to char[].
11172 // ..\jdk\src\java.base\share\classes\java\lang\StringLatin1.java
11173 // @HotSpotIntrinsicCandidate
11174 // private static void inflate(byte[] src, int srcOff, char[] dst, int dstOff, int len) {
11175 // for (int i = 0; i < len; i++) {
11176 // dst[dstOff++] = (char)(src[srcOff++] & 0xff);
11177 // }
11178 // }
11179 void MacroAssembler::byte_array_inflate(Register src, Register dst, Register len,
11180 XMMRegister tmp1, Register tmp2) {
11181 Label copy_chars_loop, done, below_threshold;
11182 // rsi: src
11183 // rdi: dst
11184 // rdx: len
11185 // rcx: tmp2
11186
11187 // rsi holds start addr of source byte[] to be inflated
11188 // rdi holds start addr of destination char[]
11189 // rdx holds length
11190 assert_different_registers(src, dst, len, tmp2);
11191
11192 if ((UseAVX > 2) && // AVX512
11193 VM_Version::supports_avx512vlbw() &&
11194 VM_Version::supports_bmi2()) {
11195
11196 set_vector_masking(); // opening of the stub context for programming mask registers
11197
11198 Label copy_32_loop, copy_tail;
11199 Register tmp3_aliased = len;
11200
11201 // if length of the string is less than 16, handle it in an old fashioned
11202 // way
11203 testl(len, -16);
11204 jcc(Assembler::zero, below_threshold);
11205
11206 // In order to use only one arithmetic operation for the main loop we use
11207 // this pre-calculation
11208 movl(tmp2, len);
11209 andl(tmp2, (32 - 1)); // tail count (in chars), 32 element wide loop
11210 andl(len, -32); // vector count
11211 jccb(Assembler::zero, copy_tail);
11212
11213 lea(src, Address(src, len, Address::times_1));
11214 lea(dst, Address(dst, len, Address::times_2));
11215 negptr(len);
11216
11217
11218 // inflate 32 chars per iter
11219 bind(copy_32_loop);
11220 vpmovzxbw(tmp1, Address(src, len, Address::times_1), Assembler::AVX_512bit);
11221 evmovdquw(Address(dst, len, Address::times_2), tmp1, Assembler::AVX_512bit);
11222 addptr(len, 32);
11223 jcc(Assembler::notZero, copy_32_loop);
11224
11225 bind(copy_tail);
11226 // bail out when there is nothing to be done
11227 testl(tmp2, -1); // we don't destroy the contents of tmp2 here
11228 jcc(Assembler::zero, done);
11229
11230 // Save k1
11231 kmovql(k2, k1);
11232
11233 // ~(~0 << length), where length is the # of remaining elements to process
11234 movl(tmp3_aliased, -1);
11235 shlxl(tmp3_aliased, tmp3_aliased, tmp2);
11236 notl(tmp3_aliased);
11237 kmovdl(k1, tmp3_aliased);
11238 evpmovzxbw(tmp1, k1, Address(src, 0), Assembler::AVX_512bit);
11239 evmovdquw(Address(dst, 0), k1, tmp1, Assembler::AVX_512bit);
11240
11241 // Restore k1
11242 kmovql(k1, k2);
11243 jmp(done);
11244
11245 clear_vector_masking(); // closing of the stub context for programming mask registers
11246 }
11247 if (UseSSE42Intrinsics) {
11248 Label copy_16_loop, copy_8_loop, copy_bytes, copy_new_tail, copy_tail;
11249
11250 movl(tmp2, len);
11251
11252 if (UseAVX > 1) {
11253 andl(tmp2, (16 - 1));
11254 andl(len, -16);
11255 jccb(Assembler::zero, copy_new_tail);
11256 } else {
11257 andl(tmp2, 0x00000007); // tail count (in chars)
11258 andl(len, 0xfffffff8); // vector count (in chars)
11259 jccb(Assembler::zero, copy_tail);
11260 }
11261
11262 // vectored inflation
11263 lea(src, Address(src, len, Address::times_1));
11264 lea(dst, Address(dst, len, Address::times_2));
11265 negptr(len);
11266
11267 if (UseAVX > 1) {
11268 bind(copy_16_loop);
11269 vpmovzxbw(tmp1, Address(src, len, Address::times_1), Assembler::AVX_256bit);
11270 vmovdqu(Address(dst, len, Address::times_2), tmp1);
11271 addptr(len, 16);
11272 jcc(Assembler::notZero, copy_16_loop);
11273
11274 bind(below_threshold);
11275 bind(copy_new_tail);
11276 if ((UseAVX > 2) &&
11277 VM_Version::supports_avx512vlbw() &&
11278 VM_Version::supports_bmi2()) {
11279 movl(tmp2, len);
11280 } else {
11281 movl(len, tmp2);
11282 }
11283 andl(tmp2, 0x00000007);
11284 andl(len, 0xFFFFFFF8);
11285 jccb(Assembler::zero, copy_tail);
11286
11287 pmovzxbw(tmp1, Address(src, 0));
11288 movdqu(Address(dst, 0), tmp1);
11289 addptr(src, 8);
11290 addptr(dst, 2 * 8);
11291
11292 jmp(copy_tail, true);
11293 }
11294
11295 // inflate 8 chars per iter
11296 bind(copy_8_loop);
11297 pmovzxbw(tmp1, Address(src, len, Address::times_1)); // unpack to 8 words
11298 movdqu(Address(dst, len, Address::times_2), tmp1);
11299 addptr(len, 8);
11300 jcc(Assembler::notZero, copy_8_loop);
11301
11302 bind(copy_tail);
11303 movl(len, tmp2);
11304
11305 cmpl(len, 4);
11306 jccb(Assembler::less, copy_bytes);
11307
11308 movdl(tmp1, Address(src, 0)); // load 4 byte chars
11309 pmovzxbw(tmp1, tmp1);
11310 movq(Address(dst, 0), tmp1);
11311 subptr(len, 4);
11312 addptr(src, 4);
11313 addptr(dst, 8);
11314
11315 bind(copy_bytes);
11316 }
11317 testl(len, len);
11318 jccb(Assembler::zero, done);
11319 lea(src, Address(src, len, Address::times_1));
11320 lea(dst, Address(dst, len, Address::times_2));
11321 negptr(len);
11322
11323 // inflate 1 char per iter
11324 bind(copy_chars_loop);
11325 load_unsigned_byte(tmp2, Address(src, len, Address::times_1)); // load byte char
11326 movw(Address(dst, len, Address::times_2), tmp2); // inflate byte char to word
11327 increment(len);
11328 jcc(Assembler::notZero, copy_chars_loop);
11329
11330 bind(done);
11331 }
11332
11333 Assembler::Condition MacroAssembler::negate_condition(Assembler::Condition cond) {
11334 switch (cond) {
11335 // Note some conditions are synonyms for others
11336 case Assembler::zero: return Assembler::notZero;
11337 case Assembler::notZero: return Assembler::zero;
11338 case Assembler::less: return Assembler::greaterEqual;
11339 case Assembler::lessEqual: return Assembler::greater;
11340 case Assembler::greater: return Assembler::lessEqual;
11341 case Assembler::greaterEqual: return Assembler::less;
11342 case Assembler::below: return Assembler::aboveEqual;
11343 case Assembler::belowEqual: return Assembler::above;
11344 case Assembler::above: return Assembler::belowEqual;
11345 case Assembler::aboveEqual: return Assembler::below;
11346 case Assembler::overflow: return Assembler::noOverflow;
11347 case Assembler::noOverflow: return Assembler::overflow;
11348 case Assembler::negative: return Assembler::positive;
11349 case Assembler::positive: return Assembler::negative;
11350 case Assembler::parity: return Assembler::noParity;
11351 case Assembler::noParity: return Assembler::parity;
11352 }
11353 ShouldNotReachHere(); return Assembler::overflow;
11354 }
11355
11356 SkipIfEqual::SkipIfEqual(
11357 MacroAssembler* masm, const bool* flag_addr, bool value) {
11358 _masm = masm;
11359 _masm->cmp8(ExternalAddress((address)flag_addr), value);
11360 _masm->jcc(Assembler::equal, _label);
11361 }
11362
11363 SkipIfEqual::~SkipIfEqual() {
11364 _masm->bind(_label);
11365 }
11366
11367 // 32-bit Windows has its own fast-path implementation
11368 // of get_thread
11369 #if !defined(WIN32) || defined(_LP64)
11370
11371 // This is simply a call to Thread::current()
11372 void MacroAssembler::get_thread(Register thread) {
11373 if (thread != rax) {
11374 push(rax);
11375 }
11376 LP64_ONLY(push(rdi);)
11377 LP64_ONLY(push(rsi);)
11378 push(rdx);
11379 push(rcx);
11380 #ifdef _LP64
11381 push(r8);
11382 push(r9);
11383 push(r10);
11384 push(r11);
11385 #endif
11386
11387 MacroAssembler::call_VM_leaf_base(CAST_FROM_FN_PTR(address, Thread::current), 0);
11388
11389 #ifdef _LP64
11390 pop(r11);
11391 pop(r10);
11392 pop(r9);
11393 pop(r8);
11394 #endif
11395 pop(rcx);
11396 pop(rdx);
11397 LP64_ONLY(pop(rsi);)
11398 LP64_ONLY(pop(rdi);)
11399 if (thread != rax) {
11400 mov(thread, rax);
11401 pop(rax);
11402 }
11403 }
11404
11405 #endif