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/barrierSet.hpp"
31 #include "gc/shared/barrierSetAssembler.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/access.hpp"
37 #include "oops/klass.inline.hpp"
38 #include "prims/methodHandles.hpp"
39 #include "runtime/biasedLocking.hpp"
40 #include "runtime/flags/flagSetting.hpp"
41 #include "runtime/interfaceSupport.inline.hpp"
42 #include "runtime/objectMonitor.hpp"
43 #include "runtime/os.hpp"
44 #include "runtime/safepoint.hpp"
45 #include "runtime/safepointMechanism.hpp"
46 #include "runtime/sharedRuntime.hpp"
47 #include "runtime/stubRoutines.hpp"
48 #include "runtime/thread.hpp"
49 #include "utilities/macros.hpp"
50 #include "crc32c.h"
51 #ifdef COMPILER2
52 #include "opto/intrinsicnode.hpp"
53 #endif
54
55 #ifdef PRODUCT
56 #define BLOCK_COMMENT(str) /* nothing */
57 #define STOP(error) stop(error)
58 #else
59 #define BLOCK_COMMENT(str) block_comment(str)
60 #define STOP(error) block_comment(error); stop(error)
61 #endif
62
63 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":")
64
65 #ifdef ASSERT
66 bool AbstractAssembler::pd_check_instruction_mark() { return true; }
67 #endif
68
69 static Assembler::Condition reverse[] = {
70 Assembler::noOverflow /* overflow = 0x0 */ ,
71 Assembler::overflow /* noOverflow = 0x1 */ ,
72 Assembler::aboveEqual /* carrySet = 0x2, below = 0x2 */ ,
73 Assembler::below /* aboveEqual = 0x3, carryClear = 0x3 */ ,
74 Assembler::notZero /* zero = 0x4, equal = 0x4 */ ,
75 Assembler::zero /* notZero = 0x5, notEqual = 0x5 */ ,
76 Assembler::above /* belowEqual = 0x6 */ ,
77 Assembler::belowEqual /* above = 0x7 */ ,
78 Assembler::positive /* negative = 0x8 */ ,
79 Assembler::negative /* positive = 0x9 */ ,
80 Assembler::noParity /* parity = 0xa */ ,
81 Assembler::parity /* noParity = 0xb */ ,
82 Assembler::greaterEqual /* less = 0xc */ ,
83 Assembler::less /* greaterEqual = 0xd */ ,
84 Assembler::greater /* lessEqual = 0xe */ ,
85 Assembler::lessEqual /* greater = 0xf, */
86
87 };
88
89
90 // Implementation of MacroAssembler
91
92 // First all the versions that have distinct versions depending on 32/64 bit
93 // Unless the difference is trivial (1 line or so).
94
95 #ifndef _LP64
96
97 // 32bit versions
98
99 Address MacroAssembler::as_Address(AddressLiteral adr) {
100 return Address(adr.target(), adr.rspec());
101 }
102
103 Address MacroAssembler::as_Address(ArrayAddress adr) {
104 return Address::make_array(adr);
105 }
106
107 void MacroAssembler::call_VM_leaf_base(address entry_point,
108 int number_of_arguments) {
109 call(RuntimeAddress(entry_point));
110 increment(rsp, number_of_arguments * wordSize);
111 }
112
113 void MacroAssembler::cmpklass(Address src1, Metadata* obj) {
114 cmp_literal32(src1, (int32_t)obj, metadata_Relocation::spec_for_immediate());
115 }
116
117 void MacroAssembler::cmpklass(Register src1, Metadata* obj) {
118 cmp_literal32(src1, (int32_t)obj, metadata_Relocation::spec_for_immediate());
119 }
120
121 void MacroAssembler::cmpoop(Address src1, jobject obj) {
122 cmp_literal32(src1, (int32_t)obj, oop_Relocation::spec_for_immediate());
123 }
124
125 void MacroAssembler::cmpoop(Register src1, jobject obj) {
126 cmp_literal32(src1, (int32_t)obj, oop_Relocation::spec_for_immediate());
127 }
128
129 void MacroAssembler::extend_sign(Register hi, Register lo) {
130 // According to Intel Doc. AP-526, "Integer Divide", p.18.
131 if (VM_Version::is_P6() && hi == rdx && lo == rax) {
132 cdql();
133 } else {
134 movl(hi, lo);
135 sarl(hi, 31);
136 }
137 }
138
139 void MacroAssembler::jC2(Register tmp, Label& L) {
140 // set parity bit if FPU flag C2 is set (via rax)
141 save_rax(tmp);
142 fwait(); fnstsw_ax();
143 sahf();
144 restore_rax(tmp);
145 // branch
146 jcc(Assembler::parity, L);
147 }
148
149 void MacroAssembler::jnC2(Register tmp, Label& L) {
150 // set parity bit if FPU flag C2 is set (via rax)
151 save_rax(tmp);
152 fwait(); fnstsw_ax();
153 sahf();
154 restore_rax(tmp);
155 // branch
156 jcc(Assembler::noParity, L);
157 }
158
159 // 32bit can do a case table jump in one instruction but we no longer allow the base
160 // to be installed in the Address class
161 void MacroAssembler::jump(ArrayAddress entry) {
162 jmp(as_Address(entry));
163 }
164
165 // Note: y_lo will be destroyed
166 void MacroAssembler::lcmp2int(Register x_hi, Register x_lo, Register y_hi, Register y_lo) {
167 // Long compare for Java (semantics as described in JVM spec.)
168 Label high, low, done;
169
170 cmpl(x_hi, y_hi);
171 jcc(Assembler::less, low);
172 jcc(Assembler::greater, high);
173 // x_hi is the return register
174 xorl(x_hi, x_hi);
175 cmpl(x_lo, y_lo);
176 jcc(Assembler::below, low);
177 jcc(Assembler::equal, done);
178
179 bind(high);
180 xorl(x_hi, x_hi);
181 increment(x_hi);
182 jmp(done);
183
184 bind(low);
185 xorl(x_hi, x_hi);
186 decrementl(x_hi);
187
188 bind(done);
189 }
190
191 void MacroAssembler::lea(Register dst, AddressLiteral src) {
192 mov_literal32(dst, (int32_t)src.target(), src.rspec());
193 }
194
195 void MacroAssembler::lea(Address dst, AddressLiteral adr) {
196 // leal(dst, as_Address(adr));
197 // see note in movl as to why we must use a move
198 mov_literal32(dst, (int32_t) adr.target(), adr.rspec());
199 }
200
201 void MacroAssembler::leave() {
202 mov(rsp, rbp);
203 pop(rbp);
204 }
205
206 void MacroAssembler::lmul(int x_rsp_offset, int y_rsp_offset) {
207 // Multiplication of two Java long values stored on the stack
208 // as illustrated below. Result is in rdx:rax.
209 //
210 // rsp ---> [ ?? ] \ \
211 // .... | y_rsp_offset |
212 // [ y_lo ] / (in bytes) | x_rsp_offset
213 // [ y_hi ] | (in bytes)
214 // .... |
215 // [ x_lo ] /
216 // [ x_hi ]
217 // ....
218 //
219 // Basic idea: lo(result) = lo(x_lo * y_lo)
220 // hi(result) = hi(x_lo * y_lo) + lo(x_hi * y_lo) + lo(x_lo * y_hi)
221 Address x_hi(rsp, x_rsp_offset + wordSize); Address x_lo(rsp, x_rsp_offset);
222 Address y_hi(rsp, y_rsp_offset + wordSize); Address y_lo(rsp, y_rsp_offset);
223 Label quick;
224 // load x_hi, y_hi and check if quick
225 // multiplication is possible
226 movl(rbx, x_hi);
227 movl(rcx, y_hi);
228 movl(rax, rbx);
229 orl(rbx, rcx); // rbx, = 0 <=> x_hi = 0 and y_hi = 0
230 jcc(Assembler::zero, quick); // if rbx, = 0 do quick multiply
231 // do full multiplication
232 // 1st step
233 mull(y_lo); // x_hi * y_lo
234 movl(rbx, rax); // save lo(x_hi * y_lo) in rbx,
235 // 2nd step
236 movl(rax, x_lo);
237 mull(rcx); // x_lo * y_hi
238 addl(rbx, rax); // add lo(x_lo * y_hi) to rbx,
239 // 3rd step
240 bind(quick); // note: rbx, = 0 if quick multiply!
241 movl(rax, x_lo);
242 mull(y_lo); // x_lo * y_lo
243 addl(rdx, rbx); // correct hi(x_lo * y_lo)
244 }
245
246 void MacroAssembler::lneg(Register hi, Register lo) {
247 negl(lo);
248 adcl(hi, 0);
249 negl(hi);
250 }
251
252 void MacroAssembler::lshl(Register hi, Register lo) {
253 // Java shift left long support (semantics as described in JVM spec., p.305)
254 // (basic idea for shift counts s >= n: x << s == (x << n) << (s - n))
255 // shift value is in rcx !
256 assert(hi != rcx, "must not use rcx");
257 assert(lo != rcx, "must not use rcx");
258 const Register s = rcx; // shift count
259 const int n = BitsPerWord;
260 Label L;
261 andl(s, 0x3f); // s := s & 0x3f (s < 0x40)
262 cmpl(s, n); // if (s < n)
263 jcc(Assembler::less, L); // else (s >= n)
264 movl(hi, lo); // x := x << n
265 xorl(lo, lo);
266 // Note: subl(s, n) is not needed since the Intel shift instructions work rcx mod n!
267 bind(L); // s (mod n) < n
268 shldl(hi, lo); // x := x << s
269 shll(lo);
270 }
271
272
273 void MacroAssembler::lshr(Register hi, Register lo, bool sign_extension) {
274 // Java shift right long support (semantics as described in JVM spec., p.306 & p.310)
275 // (basic idea for shift counts s >= n: x >> s == (x >> n) >> (s - n))
276 assert(hi != rcx, "must not use rcx");
277 assert(lo != rcx, "must not use rcx");
278 const Register s = rcx; // shift count
279 const int n = BitsPerWord;
280 Label L;
281 andl(s, 0x3f); // s := s & 0x3f (s < 0x40)
282 cmpl(s, n); // if (s < n)
283 jcc(Assembler::less, L); // else (s >= n)
284 movl(lo, hi); // x := x >> n
285 if (sign_extension) sarl(hi, 31);
286 else xorl(hi, hi);
287 // Note: subl(s, n) is not needed since the Intel shift instructions work rcx mod n!
288 bind(L); // s (mod n) < n
289 shrdl(lo, hi); // x := x >> s
290 if (sign_extension) sarl(hi);
291 else shrl(hi);
292 }
293
294 void MacroAssembler::movoop(Register dst, jobject obj) {
295 mov_literal32(dst, (int32_t)obj, oop_Relocation::spec_for_immediate());
296 }
297
298 void MacroAssembler::movoop(Address dst, jobject obj) {
299 mov_literal32(dst, (int32_t)obj, oop_Relocation::spec_for_immediate());
300 }
301
302 void MacroAssembler::mov_metadata(Register dst, Metadata* obj) {
303 mov_literal32(dst, (int32_t)obj, metadata_Relocation::spec_for_immediate());
304 }
305
306 void MacroAssembler::mov_metadata(Address dst, Metadata* obj) {
307 mov_literal32(dst, (int32_t)obj, metadata_Relocation::spec_for_immediate());
308 }
309
310 void MacroAssembler::movptr(Register dst, AddressLiteral src, Register scratch) {
311 // scratch register is not used,
312 // it is defined to match parameters of 64-bit version of this method.
313 if (src.is_lval()) {
314 mov_literal32(dst, (intptr_t)src.target(), src.rspec());
315 } else {
316 movl(dst, as_Address(src));
317 }
318 }
319
320 void MacroAssembler::movptr(ArrayAddress dst, Register src) {
321 movl(as_Address(dst), src);
322 }
323
324 void MacroAssembler::movptr(Register dst, ArrayAddress src) {
325 movl(dst, as_Address(src));
326 }
327
328 // src should NEVER be a real pointer. Use AddressLiteral for true pointers
329 void MacroAssembler::movptr(Address dst, intptr_t src) {
330 movl(dst, src);
331 }
332
333
334 void MacroAssembler::pop_callee_saved_registers() {
335 pop(rcx);
336 pop(rdx);
337 pop(rdi);
338 pop(rsi);
339 }
340
341 void MacroAssembler::pop_fTOS() {
342 fld_d(Address(rsp, 0));
343 addl(rsp, 2 * wordSize);
344 }
345
346 void MacroAssembler::push_callee_saved_registers() {
347 push(rsi);
348 push(rdi);
349 push(rdx);
350 push(rcx);
351 }
352
353 void MacroAssembler::push_fTOS() {
354 subl(rsp, 2 * wordSize);
355 fstp_d(Address(rsp, 0));
356 }
357
358
359 void MacroAssembler::pushoop(jobject obj) {
360 push_literal32((int32_t)obj, oop_Relocation::spec_for_immediate());
361 }
362
363 void MacroAssembler::pushklass(Metadata* obj) {
364 push_literal32((int32_t)obj, metadata_Relocation::spec_for_immediate());
365 }
366
367 void MacroAssembler::pushptr(AddressLiteral src) {
368 if (src.is_lval()) {
369 push_literal32((int32_t)src.target(), src.rspec());
370 } else {
371 pushl(as_Address(src));
372 }
373 }
374
375 void MacroAssembler::set_word_if_not_zero(Register dst) {
376 xorl(dst, dst);
377 set_byte_if_not_zero(dst);
378 }
379
380 static void pass_arg0(MacroAssembler* masm, Register arg) {
381 masm->push(arg);
382 }
383
384 static void pass_arg1(MacroAssembler* masm, Register arg) {
385 masm->push(arg);
386 }
387
388 static void pass_arg2(MacroAssembler* masm, Register arg) {
389 masm->push(arg);
390 }
391
392 static void pass_arg3(MacroAssembler* masm, Register arg) {
393 masm->push(arg);
394 }
395
396 #ifndef PRODUCT
397 extern "C" void findpc(intptr_t x);
398 #endif
399
400 void MacroAssembler::debug32(int rdi, int rsi, int rbp, int rsp, int rbx, int rdx, int rcx, int rax, int eip, char* msg) {
401 // In order to get locks to work, we need to fake a in_VM state
402 JavaThread* thread = JavaThread::current();
403 JavaThreadState saved_state = thread->thread_state();
404 thread->set_thread_state(_thread_in_vm);
405 if (ShowMessageBoxOnError) {
406 JavaThread* thread = JavaThread::current();
407 JavaThreadState saved_state = thread->thread_state();
408 thread->set_thread_state(_thread_in_vm);
409 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
410 ttyLocker ttyl;
411 BytecodeCounter::print();
412 }
413 // To see where a verify_oop failed, get $ebx+40/X for this frame.
414 // This is the value of eip which points to where verify_oop will return.
415 if (os::message_box(msg, "Execution stopped, print registers?")) {
416 print_state32(rdi, rsi, rbp, rsp, rbx, rdx, rcx, rax, eip);
417 BREAKPOINT;
418 }
419 } else {
420 ttyLocker ttyl;
421 ::tty->print_cr("=============== DEBUG MESSAGE: %s ================\n", msg);
422 }
423 // Don't assert holding the ttyLock
424 assert(false, "DEBUG MESSAGE: %s", msg);
425 ThreadStateTransition::transition(thread, _thread_in_vm, saved_state);
426 }
427
428 void MacroAssembler::print_state32(int rdi, int rsi, int rbp, int rsp, int rbx, int rdx, int rcx, int rax, int eip) {
429 ttyLocker ttyl;
430 FlagSetting fs(Debugging, true);
431 tty->print_cr("eip = 0x%08x", eip);
432 #ifndef PRODUCT
433 if ((WizardMode || Verbose) && PrintMiscellaneous) {
434 tty->cr();
435 findpc(eip);
436 tty->cr();
437 }
438 #endif
439 #define PRINT_REG(rax) \
440 { tty->print("%s = ", #rax); os::print_location(tty, rax); }
441 PRINT_REG(rax);
442 PRINT_REG(rbx);
443 PRINT_REG(rcx);
444 PRINT_REG(rdx);
445 PRINT_REG(rdi);
446 PRINT_REG(rsi);
447 PRINT_REG(rbp);
448 PRINT_REG(rsp);
449 #undef PRINT_REG
450 // Print some words near top of staack.
451 int* dump_sp = (int*) rsp;
452 for (int col1 = 0; col1 < 8; col1++) {
453 tty->print("(rsp+0x%03x) 0x%08x: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp);
454 os::print_location(tty, *dump_sp++);
455 }
456 for (int row = 0; row < 16; row++) {
457 tty->print("(rsp+0x%03x) 0x%08x: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp);
458 for (int col = 0; col < 8; col++) {
459 tty->print(" 0x%08x", *dump_sp++);
460 }
461 tty->cr();
462 }
463 // Print some instructions around pc:
464 Disassembler::decode((address)eip-64, (address)eip);
465 tty->print_cr("--------");
466 Disassembler::decode((address)eip, (address)eip+32);
467 }
468
469 void MacroAssembler::stop(const char* msg) {
470 ExternalAddress message((address)msg);
471 // push address of message
472 pushptr(message.addr());
473 { Label L; call(L, relocInfo::none); bind(L); } // push eip
474 pusha(); // push registers
475 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug32)));
476 hlt();
477 }
478
479 void MacroAssembler::warn(const char* msg) {
480 push_CPU_state();
481
482 ExternalAddress message((address) msg);
483 // push address of message
484 pushptr(message.addr());
485
486 call(RuntimeAddress(CAST_FROM_FN_PTR(address, warning)));
487 addl(rsp, wordSize); // discard argument
488 pop_CPU_state();
489 }
490
491 void MacroAssembler::print_state() {
492 { Label L; call(L, relocInfo::none); bind(L); } // push eip
493 pusha(); // push registers
494
495 push_CPU_state();
496 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::print_state32)));
497 pop_CPU_state();
498
499 popa();
500 addl(rsp, wordSize);
501 }
502
503 #else // _LP64
504
505 // 64 bit versions
506
507 Address MacroAssembler::as_Address(AddressLiteral adr) {
508 // amd64 always does this as a pc-rel
509 // we can be absolute or disp based on the instruction type
510 // jmp/call are displacements others are absolute
511 assert(!adr.is_lval(), "must be rval");
512 assert(reachable(adr), "must be");
513 return Address((int32_t)(intptr_t)(adr.target() - pc()), adr.target(), adr.reloc());
514
515 }
516
517 Address MacroAssembler::as_Address(ArrayAddress adr) {
518 AddressLiteral base = adr.base();
519 lea(rscratch1, base);
520 Address index = adr.index();
521 assert(index._disp == 0, "must not have disp"); // maybe it can?
522 Address array(rscratch1, index._index, index._scale, index._disp);
523 return array;
524 }
525
526 void MacroAssembler::call_VM_leaf_base(address entry_point, int num_args) {
527 Label L, E;
528
529 #ifdef _WIN64
530 // Windows always allocates space for it's register args
531 assert(num_args <= 4, "only register arguments supported");
532 subq(rsp, frame::arg_reg_save_area_bytes);
533 #endif
534
535 // Align stack if necessary
536 testl(rsp, 15);
537 jcc(Assembler::zero, L);
538
539 subq(rsp, 8);
540 {
541 call(RuntimeAddress(entry_point));
542 }
543 addq(rsp, 8);
544 jmp(E);
545
546 bind(L);
547 {
548 call(RuntimeAddress(entry_point));
549 }
550
551 bind(E);
552
553 #ifdef _WIN64
554 // restore stack pointer
555 addq(rsp, frame::arg_reg_save_area_bytes);
556 #endif
557
558 }
559
560 void MacroAssembler::cmp64(Register src1, AddressLiteral src2) {
561 assert(!src2.is_lval(), "should use cmpptr");
562
563 if (reachable(src2)) {
564 cmpq(src1, as_Address(src2));
565 } else {
566 lea(rscratch1, src2);
567 Assembler::cmpq(src1, Address(rscratch1, 0));
568 }
569 }
570
571 int MacroAssembler::corrected_idivq(Register reg) {
572 // Full implementation of Java ldiv and lrem; checks for special
573 // case as described in JVM spec., p.243 & p.271. The function
574 // returns the (pc) offset of the idivl instruction - may be needed
575 // for implicit exceptions.
576 //
577 // normal case special case
578 //
579 // input : rax: dividend min_long
580 // reg: divisor (may not be eax/edx) -1
581 //
582 // output: rax: quotient (= rax idiv reg) min_long
583 // rdx: remainder (= rax irem reg) 0
584 assert(reg != rax && reg != rdx, "reg cannot be rax or rdx register");
585 static const int64_t min_long = 0x8000000000000000;
586 Label normal_case, special_case;
587
588 // check for special case
589 cmp64(rax, ExternalAddress((address) &min_long));
590 jcc(Assembler::notEqual, normal_case);
591 xorl(rdx, rdx); // prepare rdx for possible special case (where
592 // remainder = 0)
593 cmpq(reg, -1);
594 jcc(Assembler::equal, special_case);
595
596 // handle normal case
597 bind(normal_case);
598 cdqq();
599 int idivq_offset = offset();
600 idivq(reg);
601
602 // normal and special case exit
603 bind(special_case);
604
605 return idivq_offset;
606 }
607
608 void MacroAssembler::decrementq(Register reg, int value) {
609 if (value == min_jint) { subq(reg, value); return; }
610 if (value < 0) { incrementq(reg, -value); return; }
611 if (value == 0) { ; return; }
612 if (value == 1 && UseIncDec) { decq(reg) ; return; }
613 /* else */ { subq(reg, value) ; return; }
614 }
615
616 void MacroAssembler::decrementq(Address dst, int value) {
617 if (value == min_jint) { subq(dst, value); return; }
618 if (value < 0) { incrementq(dst, -value); return; }
619 if (value == 0) { ; return; }
620 if (value == 1 && UseIncDec) { decq(dst) ; return; }
621 /* else */ { subq(dst, value) ; return; }
622 }
623
624 void MacroAssembler::incrementq(AddressLiteral dst) {
625 if (reachable(dst)) {
626 incrementq(as_Address(dst));
627 } else {
628 lea(rscratch1, dst);
629 incrementq(Address(rscratch1, 0));
630 }
631 }
632
633 void MacroAssembler::incrementq(Register reg, int value) {
634 if (value == min_jint) { addq(reg, value); return; }
635 if (value < 0) { decrementq(reg, -value); return; }
636 if (value == 0) { ; return; }
637 if (value == 1 && UseIncDec) { incq(reg) ; return; }
638 /* else */ { addq(reg, value) ; return; }
639 }
640
641 void MacroAssembler::incrementq(Address dst, int value) {
642 if (value == min_jint) { addq(dst, value); return; }
643 if (value < 0) { decrementq(dst, -value); return; }
644 if (value == 0) { ; return; }
645 if (value == 1 && UseIncDec) { incq(dst) ; return; }
646 /* else */ { addq(dst, value) ; return; }
647 }
648
649 // 32bit can do a case table jump in one instruction but we no longer allow the base
650 // to be installed in the Address class
651 void MacroAssembler::jump(ArrayAddress entry) {
652 lea(rscratch1, entry.base());
653 Address dispatch = entry.index();
654 assert(dispatch._base == noreg, "must be");
655 dispatch._base = rscratch1;
656 jmp(dispatch);
657 }
658
659 void MacroAssembler::lcmp2int(Register x_hi, Register x_lo, Register y_hi, Register y_lo) {
660 ShouldNotReachHere(); // 64bit doesn't use two regs
661 cmpq(x_lo, y_lo);
662 }
663
664 void MacroAssembler::lea(Register dst, AddressLiteral src) {
665 mov_literal64(dst, (intptr_t)src.target(), src.rspec());
666 }
667
668 void MacroAssembler::lea(Address dst, AddressLiteral adr) {
669 mov_literal64(rscratch1, (intptr_t)adr.target(), adr.rspec());
670 movptr(dst, rscratch1);
671 }
672
673 void MacroAssembler::leave() {
674 // %%% is this really better? Why not on 32bit too?
675 emit_int8((unsigned char)0xC9); // LEAVE
676 }
677
678 void MacroAssembler::lneg(Register hi, Register lo) {
679 ShouldNotReachHere(); // 64bit doesn't use two regs
680 negq(lo);
681 }
682
683 void MacroAssembler::movoop(Register dst, jobject obj) {
684 mov_literal64(dst, (intptr_t)obj, oop_Relocation::spec_for_immediate());
685 }
686
687 void MacroAssembler::movoop(Address dst, jobject obj) {
688 mov_literal64(rscratch1, (intptr_t)obj, oop_Relocation::spec_for_immediate());
689 movq(dst, rscratch1);
690 }
691
692 void MacroAssembler::mov_metadata(Register dst, Metadata* obj) {
693 mov_literal64(dst, (intptr_t)obj, metadata_Relocation::spec_for_immediate());
694 }
695
696 void MacroAssembler::mov_metadata(Address dst, Metadata* obj) {
697 mov_literal64(rscratch1, (intptr_t)obj, metadata_Relocation::spec_for_immediate());
698 movq(dst, rscratch1);
699 }
700
701 void MacroAssembler::movptr(Register dst, AddressLiteral src, Register scratch) {
702 if (src.is_lval()) {
703 mov_literal64(dst, (intptr_t)src.target(), src.rspec());
704 } else {
705 if (reachable(src)) {
706 movq(dst, as_Address(src));
707 } else {
708 lea(scratch, src);
709 movq(dst, Address(scratch, 0));
710 }
711 }
712 }
713
714 void MacroAssembler::movptr(ArrayAddress dst, Register src) {
715 movq(as_Address(dst), src);
716 }
717
718 void MacroAssembler::movptr(Register dst, ArrayAddress src) {
719 movq(dst, as_Address(src));
720 }
721
722 // src should NEVER be a real pointer. Use AddressLiteral for true pointers
723 void MacroAssembler::movptr(Address dst, intptr_t src) {
724 mov64(rscratch1, src);
725 movq(dst, rscratch1);
726 }
727
728 // These are mostly for initializing NULL
729 void MacroAssembler::movptr(Address dst, int32_t src) {
730 movslq(dst, src);
731 }
732
733 void MacroAssembler::movptr(Register dst, int32_t src) {
734 mov64(dst, (intptr_t)src);
735 }
736
737 void MacroAssembler::pushoop(jobject obj) {
738 movoop(rscratch1, obj);
739 push(rscratch1);
740 }
741
742 void MacroAssembler::pushklass(Metadata* obj) {
743 mov_metadata(rscratch1, obj);
744 push(rscratch1);
745 }
746
747 void MacroAssembler::pushptr(AddressLiteral src) {
748 lea(rscratch1, src);
749 if (src.is_lval()) {
750 push(rscratch1);
751 } else {
752 pushq(Address(rscratch1, 0));
753 }
754 }
755
756 void MacroAssembler::reset_last_Java_frame(bool clear_fp) {
757 // we must set sp to zero to clear frame
758 movptr(Address(r15_thread, JavaThread::last_Java_sp_offset()), NULL_WORD);
759 // must clear fp, so that compiled frames are not confused; it is
760 // possible that we need it only for debugging
761 if (clear_fp) {
762 movptr(Address(r15_thread, JavaThread::last_Java_fp_offset()), NULL_WORD);
763 }
764
765 // Always clear the pc because it could have been set by make_walkable()
766 movptr(Address(r15_thread, JavaThread::last_Java_pc_offset()), NULL_WORD);
767 vzeroupper();
768 }
769
770 void MacroAssembler::set_last_Java_frame(Register last_java_sp,
771 Register last_java_fp,
772 address last_java_pc) {
773 vzeroupper();
774 // determine last_java_sp register
775 if (!last_java_sp->is_valid()) {
776 last_java_sp = rsp;
777 }
778
779 // last_java_fp is optional
780 if (last_java_fp->is_valid()) {
781 movptr(Address(r15_thread, JavaThread::last_Java_fp_offset()),
782 last_java_fp);
783 }
784
785 // last_java_pc is optional
786 if (last_java_pc != NULL) {
787 Address java_pc(r15_thread,
788 JavaThread::frame_anchor_offset() + JavaFrameAnchor::last_Java_pc_offset());
789 lea(rscratch1, InternalAddress(last_java_pc));
790 movptr(java_pc, rscratch1);
791 }
792
793 movptr(Address(r15_thread, JavaThread::last_Java_sp_offset()), last_java_sp);
794 }
795
796 static void pass_arg0(MacroAssembler* masm, Register arg) {
797 if (c_rarg0 != arg ) {
798 masm->mov(c_rarg0, arg);
799 }
800 }
801
802 static void pass_arg1(MacroAssembler* masm, Register arg) {
803 if (c_rarg1 != arg ) {
804 masm->mov(c_rarg1, arg);
805 }
806 }
807
808 static void pass_arg2(MacroAssembler* masm, Register arg) {
809 if (c_rarg2 != arg ) {
810 masm->mov(c_rarg2, arg);
811 }
812 }
813
814 static void pass_arg3(MacroAssembler* masm, Register arg) {
815 if (c_rarg3 != arg ) {
816 masm->mov(c_rarg3, arg);
817 }
818 }
819
820 void MacroAssembler::stop(const char* msg) {
821 address rip = pc();
822 pusha(); // get regs on stack
823 lea(c_rarg0, ExternalAddress((address) msg));
824 lea(c_rarg1, InternalAddress(rip));
825 movq(c_rarg2, rsp); // pass pointer to regs array
826 andq(rsp, -16); // align stack as required by ABI
827 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug64)));
828 hlt();
829 }
830
831 void MacroAssembler::warn(const char* msg) {
832 push(rbp);
833 movq(rbp, rsp);
834 andq(rsp, -16); // align stack as required by push_CPU_state and call
835 push_CPU_state(); // keeps alignment at 16 bytes
836 lea(c_rarg0, ExternalAddress((address) msg));
837 lea(rax, ExternalAddress(CAST_FROM_FN_PTR(address, warning)));
838 call(rax);
839 pop_CPU_state();
840 mov(rsp, rbp);
841 pop(rbp);
842 }
843
844 void MacroAssembler::print_state() {
845 address rip = pc();
846 pusha(); // get regs on stack
847 push(rbp);
848 movq(rbp, rsp);
849 andq(rsp, -16); // align stack as required by push_CPU_state and call
850 push_CPU_state(); // keeps alignment at 16 bytes
851
852 lea(c_rarg0, InternalAddress(rip));
853 lea(c_rarg1, Address(rbp, wordSize)); // pass pointer to regs array
854 call_VM_leaf(CAST_FROM_FN_PTR(address, MacroAssembler::print_state64), c_rarg0, c_rarg1);
855
856 pop_CPU_state();
857 mov(rsp, rbp);
858 pop(rbp);
859 popa();
860 }
861
862 #ifndef PRODUCT
863 extern "C" void findpc(intptr_t x);
864 #endif
865
866 void MacroAssembler::debug64(char* msg, int64_t pc, int64_t regs[]) {
867 // In order to get locks to work, we need to fake a in_VM state
868 if (ShowMessageBoxOnError) {
869 JavaThread* thread = JavaThread::current();
870 JavaThreadState saved_state = thread->thread_state();
871 thread->set_thread_state(_thread_in_vm);
872 #ifndef PRODUCT
873 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
874 ttyLocker ttyl;
875 BytecodeCounter::print();
876 }
877 #endif
878 // To see where a verify_oop failed, get $ebx+40/X for this frame.
879 // XXX correct this offset for amd64
880 // This is the value of eip which points to where verify_oop will return.
881 if (os::message_box(msg, "Execution stopped, print registers?")) {
882 print_state64(pc, regs);
883 BREAKPOINT;
884 assert(false, "start up GDB");
885 }
886 ThreadStateTransition::transition(thread, _thread_in_vm, saved_state);
887 } else {
888 ttyLocker ttyl;
889 ::tty->print_cr("=============== DEBUG MESSAGE: %s ================\n",
890 msg);
891 assert(false, "DEBUG MESSAGE: %s", msg);
892 }
893 }
894
895 void MacroAssembler::print_state64(int64_t pc, int64_t regs[]) {
896 ttyLocker ttyl;
897 FlagSetting fs(Debugging, true);
898 tty->print_cr("rip = 0x%016lx", (intptr_t)pc);
899 #ifndef PRODUCT
900 tty->cr();
901 findpc(pc);
902 tty->cr();
903 #endif
904 #define PRINT_REG(rax, value) \
905 { tty->print("%s = ", #rax); os::print_location(tty, value); }
906 PRINT_REG(rax, regs[15]);
907 PRINT_REG(rbx, regs[12]);
908 PRINT_REG(rcx, regs[14]);
909 PRINT_REG(rdx, regs[13]);
910 PRINT_REG(rdi, regs[8]);
911 PRINT_REG(rsi, regs[9]);
912 PRINT_REG(rbp, regs[10]);
913 PRINT_REG(rsp, regs[11]);
914 PRINT_REG(r8 , regs[7]);
915 PRINT_REG(r9 , regs[6]);
916 PRINT_REG(r10, regs[5]);
917 PRINT_REG(r11, regs[4]);
918 PRINT_REG(r12, regs[3]);
919 PRINT_REG(r13, regs[2]);
920 PRINT_REG(r14, regs[1]);
921 PRINT_REG(r15, regs[0]);
922 #undef PRINT_REG
923 // Print some words near top of staack.
924 int64_t* rsp = (int64_t*) regs[11];
925 int64_t* dump_sp = rsp;
926 for (int col1 = 0; col1 < 8; col1++) {
927 tty->print("(rsp+0x%03x) 0x%016lx: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp);
928 os::print_location(tty, *dump_sp++);
929 }
930 for (int row = 0; row < 25; row++) {
931 tty->print("(rsp+0x%03x) 0x%016lx: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp);
932 for (int col = 0; col < 4; col++) {
933 tty->print(" 0x%016lx", (intptr_t)*dump_sp++);
934 }
935 tty->cr();
936 }
937 // Print some instructions around pc:
938 Disassembler::decode((address)pc-64, (address)pc);
939 tty->print_cr("--------");
940 Disassembler::decode((address)pc, (address)pc+32);
941 }
942
943 #endif // _LP64
944
945 // Now versions that are common to 32/64 bit
946
947 void MacroAssembler::addptr(Register dst, int32_t imm32) {
948 LP64_ONLY(addq(dst, imm32)) NOT_LP64(addl(dst, imm32));
949 }
950
951 void MacroAssembler::addptr(Register dst, Register src) {
952 LP64_ONLY(addq(dst, src)) NOT_LP64(addl(dst, src));
953 }
954
955 void MacroAssembler::addptr(Address dst, Register src) {
956 LP64_ONLY(addq(dst, src)) NOT_LP64(addl(dst, src));
957 }
958
959 void MacroAssembler::addsd(XMMRegister dst, AddressLiteral src) {
960 if (reachable(src)) {
961 Assembler::addsd(dst, as_Address(src));
962 } else {
963 lea(rscratch1, src);
964 Assembler::addsd(dst, Address(rscratch1, 0));
965 }
966 }
967
968 void MacroAssembler::addss(XMMRegister dst, AddressLiteral src) {
969 if (reachable(src)) {
970 addss(dst, as_Address(src));
971 } else {
972 lea(rscratch1, src);
973 addss(dst, Address(rscratch1, 0));
974 }
975 }
976
977 void MacroAssembler::addpd(XMMRegister dst, AddressLiteral src) {
978 if (reachable(src)) {
979 Assembler::addpd(dst, as_Address(src));
980 } else {
981 lea(rscratch1, src);
982 Assembler::addpd(dst, Address(rscratch1, 0));
983 }
984 }
985
986 void MacroAssembler::align(int modulus) {
987 align(modulus, offset());
988 }
989
990 void MacroAssembler::align(int modulus, int target) {
991 if (target % modulus != 0) {
992 nop(modulus - (target % modulus));
993 }
994 }
995
996 void MacroAssembler::andpd(XMMRegister dst, AddressLiteral src) {
997 // Used in sign-masking with aligned address.
998 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes");
999 if (reachable(src)) {
1000 Assembler::andpd(dst, as_Address(src));
1001 } else {
1002 lea(rscratch1, src);
1003 Assembler::andpd(dst, Address(rscratch1, 0));
1004 }
1005 }
1006
1007 void MacroAssembler::andps(XMMRegister dst, AddressLiteral src) {
1008 // Used in sign-masking with aligned address.
1009 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes");
1010 if (reachable(src)) {
1011 Assembler::andps(dst, as_Address(src));
1012 } else {
1013 lea(rscratch1, src);
1014 Assembler::andps(dst, Address(rscratch1, 0));
1015 }
1016 }
1017
1018 void MacroAssembler::andptr(Register dst, int32_t imm32) {
1019 LP64_ONLY(andq(dst, imm32)) NOT_LP64(andl(dst, imm32));
1020 }
1021
1022 void MacroAssembler::atomic_incl(Address counter_addr) {
1023 if (os::is_MP())
1024 lock();
1025 incrementl(counter_addr);
1026 }
1027
1028 void MacroAssembler::atomic_incl(AddressLiteral counter_addr, Register scr) {
1029 if (reachable(counter_addr)) {
1030 atomic_incl(as_Address(counter_addr));
1031 } else {
1032 lea(scr, counter_addr);
1033 atomic_incl(Address(scr, 0));
1034 }
1035 }
1036
1037 #ifdef _LP64
1038 void MacroAssembler::atomic_incq(Address counter_addr) {
1039 if (os::is_MP())
1040 lock();
1041 incrementq(counter_addr);
1042 }
1043
1044 void MacroAssembler::atomic_incq(AddressLiteral counter_addr, Register scr) {
1045 if (reachable(counter_addr)) {
1046 atomic_incq(as_Address(counter_addr));
1047 } else {
1048 lea(scr, counter_addr);
1049 atomic_incq(Address(scr, 0));
1050 }
1051 }
1052 #endif
1053
1054 // Writes to stack successive pages until offset reached to check for
1055 // stack overflow + shadow pages. This clobbers tmp.
1056 void MacroAssembler::bang_stack_size(Register size, Register tmp) {
1057 movptr(tmp, rsp);
1058 // Bang stack for total size given plus shadow page size.
1059 // Bang one page at a time because large size can bang beyond yellow and
1060 // red zones.
1061 Label loop;
1062 bind(loop);
1063 movl(Address(tmp, (-os::vm_page_size())), size );
1064 subptr(tmp, os::vm_page_size());
1065 subl(size, os::vm_page_size());
1066 jcc(Assembler::greater, loop);
1067
1068 // Bang down shadow pages too.
1069 // At this point, (tmp-0) is the last address touched, so don't
1070 // touch it again. (It was touched as (tmp-pagesize) but then tmp
1071 // was post-decremented.) Skip this address by starting at i=1, and
1072 // touch a few more pages below. N.B. It is important to touch all
1073 // the way down including all pages in the shadow zone.
1074 for (int i = 1; i < ((int)JavaThread::stack_shadow_zone_size() / os::vm_page_size()); i++) {
1075 // this could be any sized move but this is can be a debugging crumb
1076 // so the bigger the better.
1077 movptr(Address(tmp, (-i*os::vm_page_size())), size );
1078 }
1079 }
1080
1081 void MacroAssembler::reserved_stack_check() {
1082 // testing if reserved zone needs to be enabled
1083 Label no_reserved_zone_enabling;
1084 Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread);
1085 NOT_LP64(get_thread(rsi);)
1086
1087 cmpptr(rsp, Address(thread, JavaThread::reserved_stack_activation_offset()));
1088 jcc(Assembler::below, no_reserved_zone_enabling);
1089
1090 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), thread);
1091 jump(RuntimeAddress(StubRoutines::throw_delayed_StackOverflowError_entry()));
1092 should_not_reach_here();
1093
1094 bind(no_reserved_zone_enabling);
1095 }
1096
1097 int MacroAssembler::biased_locking_enter(Register lock_reg,
1098 Register obj_reg,
1099 Register swap_reg,
1100 Register tmp_reg,
1101 bool swap_reg_contains_mark,
1102 Label& done,
1103 Label* slow_case,
1104 BiasedLockingCounters* counters) {
1105 assert(UseBiasedLocking, "why call this otherwise?");
1106 assert(swap_reg == rax, "swap_reg must be rax for cmpxchgq");
1107 assert(tmp_reg != noreg, "tmp_reg must be supplied");
1108 assert_different_registers(lock_reg, obj_reg, swap_reg, tmp_reg);
1109 assert(markOopDesc::age_shift == markOopDesc::lock_bits + markOopDesc::biased_lock_bits, "biased locking makes assumptions about bit layout");
1110 Address mark_addr (obj_reg, oopDesc::mark_offset_in_bytes());
1111 NOT_LP64( Address saved_mark_addr(lock_reg, 0); )
1112
1113 if (PrintBiasedLockingStatistics && counters == NULL) {
1114 counters = BiasedLocking::counters();
1115 }
1116 // Biased locking
1117 // See whether the lock is currently biased toward our thread and
1118 // whether the epoch is still valid
1119 // Note that the runtime guarantees sufficient alignment of JavaThread
1120 // pointers to allow age to be placed into low bits
1121 // First check to see whether biasing is even enabled for this object
1122 Label cas_label;
1123 int null_check_offset = -1;
1124 if (!swap_reg_contains_mark) {
1125 null_check_offset = offset();
1126 movptr(swap_reg, mark_addr);
1127 }
1128 movptr(tmp_reg, swap_reg);
1129 andptr(tmp_reg, markOopDesc::biased_lock_mask_in_place);
1130 cmpptr(tmp_reg, markOopDesc::biased_lock_pattern);
1131 jcc(Assembler::notEqual, cas_label);
1132 // The bias pattern is present in the object's header. Need to check
1133 // whether the bias owner and the epoch are both still current.
1134 #ifndef _LP64
1135 // Note that because there is no current thread register on x86_32 we
1136 // need to store off the mark word we read out of the object to
1137 // avoid reloading it and needing to recheck invariants below. This
1138 // store is unfortunate but it makes the overall code shorter and
1139 // simpler.
1140 movptr(saved_mark_addr, swap_reg);
1141 #endif
1142 if (swap_reg_contains_mark) {
1143 null_check_offset = offset();
1144 }
1145 load_prototype_header(tmp_reg, obj_reg);
1146 #ifdef _LP64
1147 orptr(tmp_reg, r15_thread);
1148 xorptr(tmp_reg, swap_reg);
1149 Register header_reg = tmp_reg;
1150 #else
1151 xorptr(tmp_reg, swap_reg);
1152 get_thread(swap_reg);
1153 xorptr(swap_reg, tmp_reg);
1154 Register header_reg = swap_reg;
1155 #endif
1156 andptr(header_reg, ~((int) markOopDesc::age_mask_in_place));
1157 if (counters != NULL) {
1158 cond_inc32(Assembler::zero,
1159 ExternalAddress((address) counters->biased_lock_entry_count_addr()));
1160 }
1161 jcc(Assembler::equal, done);
1162
1163 Label try_revoke_bias;
1164 Label try_rebias;
1165
1166 // At this point we know that the header has the bias pattern and
1167 // that we are not the bias owner in the current epoch. We need to
1168 // figure out more details about the state of the header in order to
1169 // know what operations can be legally performed on the object's
1170 // header.
1171
1172 // If the low three bits in the xor result aren't clear, that means
1173 // the prototype header is no longer biased and we have to revoke
1174 // the bias on this object.
1175 testptr(header_reg, markOopDesc::biased_lock_mask_in_place);
1176 jccb(Assembler::notZero, try_revoke_bias);
1177
1178 // Biasing is still enabled for this data type. See whether the
1179 // epoch of the current bias is still valid, meaning that the epoch
1180 // bits of the mark word are equal to the epoch bits of the
1181 // prototype header. (Note that the prototype header's epoch bits
1182 // only change at a safepoint.) If not, attempt to rebias the object
1183 // toward the current thread. Note that we must be absolutely sure
1184 // that the current epoch is invalid in order to do this because
1185 // otherwise the manipulations it performs on the mark word are
1186 // illegal.
1187 testptr(header_reg, markOopDesc::epoch_mask_in_place);
1188 jccb(Assembler::notZero, try_rebias);
1189
1190 // The epoch of the current bias is still valid but we know nothing
1191 // about the owner; it might be set or it might be clear. Try to
1192 // acquire the bias of the object using an atomic operation. If this
1193 // fails we will go in to the runtime to revoke the object's bias.
1194 // Note that we first construct the presumed unbiased header so we
1195 // don't accidentally blow away another thread's valid bias.
1196 NOT_LP64( movptr(swap_reg, saved_mark_addr); )
1197 andptr(swap_reg,
1198 markOopDesc::biased_lock_mask_in_place | markOopDesc::age_mask_in_place | markOopDesc::epoch_mask_in_place);
1199 #ifdef _LP64
1200 movptr(tmp_reg, swap_reg);
1201 orptr(tmp_reg, r15_thread);
1202 #else
1203 get_thread(tmp_reg);
1204 orptr(tmp_reg, swap_reg);
1205 #endif
1206 if (os::is_MP()) {
1207 lock();
1208 }
1209 cmpxchgptr(tmp_reg, mark_addr); // compare tmp_reg and swap_reg
1210 // If the biasing toward our thread failed, this means that
1211 // another thread succeeded in biasing it toward itself and we
1212 // need to revoke that bias. The revocation will occur in the
1213 // interpreter runtime in the slow case.
1214 if (counters != NULL) {
1215 cond_inc32(Assembler::zero,
1216 ExternalAddress((address) counters->anonymously_biased_lock_entry_count_addr()));
1217 }
1218 if (slow_case != NULL) {
1219 jcc(Assembler::notZero, *slow_case);
1220 }
1221 jmp(done);
1222
1223 bind(try_rebias);
1224 // At this point we know the epoch has expired, meaning that the
1225 // current "bias owner", if any, is actually invalid. Under these
1226 // circumstances _only_, we are allowed to use the current header's
1227 // value as the comparison value when doing the cas to acquire the
1228 // bias in the current epoch. In other words, we allow transfer of
1229 // the bias from one thread to another directly in this situation.
1230 //
1231 // FIXME: due to a lack of registers we currently blow away the age
1232 // bits in this situation. Should attempt to preserve them.
1233 load_prototype_header(tmp_reg, obj_reg);
1234 #ifdef _LP64
1235 orptr(tmp_reg, r15_thread);
1236 #else
1237 get_thread(swap_reg);
1238 orptr(tmp_reg, swap_reg);
1239 movptr(swap_reg, saved_mark_addr);
1240 #endif
1241 if (os::is_MP()) {
1242 lock();
1243 }
1244 cmpxchgptr(tmp_reg, mark_addr); // compare tmp_reg and swap_reg
1245 // If the biasing toward our thread failed, then another thread
1246 // succeeded in biasing it toward itself and we need to revoke that
1247 // bias. The revocation will occur in the runtime in the slow case.
1248 if (counters != NULL) {
1249 cond_inc32(Assembler::zero,
1250 ExternalAddress((address) counters->rebiased_lock_entry_count_addr()));
1251 }
1252 if (slow_case != NULL) {
1253 jcc(Assembler::notZero, *slow_case);
1254 }
1255 jmp(done);
1256
1257 bind(try_revoke_bias);
1258 // The prototype mark in the klass doesn't have the bias bit set any
1259 // more, indicating that objects of this data type are not supposed
1260 // to be biased any more. We are going to try to reset the mark of
1261 // this object to the prototype value and fall through to the
1262 // CAS-based locking scheme. Note that if our CAS fails, it means
1263 // that another thread raced us for the privilege of revoking the
1264 // bias of this particular object, so it's okay to continue in the
1265 // normal locking code.
1266 //
1267 // FIXME: due to a lack of registers we currently blow away the age
1268 // bits in this situation. Should attempt to preserve them.
1269 NOT_LP64( movptr(swap_reg, saved_mark_addr); )
1270 load_prototype_header(tmp_reg, obj_reg);
1271 if (os::is_MP()) {
1272 lock();
1273 }
1274 cmpxchgptr(tmp_reg, mark_addr); // compare tmp_reg and swap_reg
1275 // Fall through to the normal CAS-based lock, because no matter what
1276 // the result of the above CAS, some thread must have succeeded in
1277 // removing the bias bit from the object's header.
1278 if (counters != NULL) {
1279 cond_inc32(Assembler::zero,
1280 ExternalAddress((address) counters->revoked_lock_entry_count_addr()));
1281 }
1282
1283 bind(cas_label);
1284
1285 return null_check_offset;
1286 }
1287
1288 void MacroAssembler::biased_locking_exit(Register obj_reg, Register temp_reg, Label& done) {
1289 assert(UseBiasedLocking, "why call this otherwise?");
1290
1291 // Check for biased locking unlock case, which is a no-op
1292 // Note: we do not have to check the thread ID for two reasons.
1293 // First, the interpreter checks for IllegalMonitorStateException at
1294 // a higher level. Second, if the bias was revoked while we held the
1295 // lock, the object could not be rebiased toward another thread, so
1296 // the bias bit would be clear.
1297 movptr(temp_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1298 andptr(temp_reg, markOopDesc::biased_lock_mask_in_place);
1299 cmpptr(temp_reg, markOopDesc::biased_lock_pattern);
1300 jcc(Assembler::equal, done);
1301 }
1302
1303 #ifdef COMPILER2
1304
1305 #if INCLUDE_RTM_OPT
1306
1307 // Update rtm_counters based on abort status
1308 // input: abort_status
1309 // rtm_counters (RTMLockingCounters*)
1310 // flags are killed
1311 void MacroAssembler::rtm_counters_update(Register abort_status, Register rtm_counters) {
1312
1313 atomic_incptr(Address(rtm_counters, RTMLockingCounters::abort_count_offset()));
1314 if (PrintPreciseRTMLockingStatistics) {
1315 for (int i = 0; i < RTMLockingCounters::ABORT_STATUS_LIMIT; i++) {
1316 Label check_abort;
1317 testl(abort_status, (1<<i));
1318 jccb(Assembler::equal, check_abort);
1319 atomic_incptr(Address(rtm_counters, RTMLockingCounters::abortX_count_offset() + (i * sizeof(uintx))));
1320 bind(check_abort);
1321 }
1322 }
1323 }
1324
1325 // Branch if (random & (count-1) != 0), count is 2^n
1326 // tmp, scr and flags are killed
1327 void MacroAssembler::branch_on_random_using_rdtsc(Register tmp, Register scr, int count, Label& brLabel) {
1328 assert(tmp == rax, "");
1329 assert(scr == rdx, "");
1330 rdtsc(); // modifies EDX:EAX
1331 andptr(tmp, count-1);
1332 jccb(Assembler::notZero, brLabel);
1333 }
1334
1335 // Perform abort ratio calculation, set no_rtm bit if high ratio
1336 // input: rtm_counters_Reg (RTMLockingCounters* address)
1337 // tmpReg, rtm_counters_Reg and flags are killed
1338 void MacroAssembler::rtm_abort_ratio_calculation(Register tmpReg,
1339 Register rtm_counters_Reg,
1340 RTMLockingCounters* rtm_counters,
1341 Metadata* method_data) {
1342 Label L_done, L_check_always_rtm1, L_check_always_rtm2;
1343
1344 if (RTMLockingCalculationDelay > 0) {
1345 // Delay calculation
1346 movptr(tmpReg, ExternalAddress((address) RTMLockingCounters::rtm_calculation_flag_addr()), tmpReg);
1347 testptr(tmpReg, tmpReg);
1348 jccb(Assembler::equal, L_done);
1349 }
1350 // Abort ratio calculation only if abort_count > RTMAbortThreshold
1351 // Aborted transactions = abort_count * 100
1352 // All transactions = total_count * RTMTotalCountIncrRate
1353 // Set no_rtm bit if (Aborted transactions >= All transactions * RTMAbortRatio)
1354
1355 movptr(tmpReg, Address(rtm_counters_Reg, RTMLockingCounters::abort_count_offset()));
1356 cmpptr(tmpReg, RTMAbortThreshold);
1357 jccb(Assembler::below, L_check_always_rtm2);
1358 imulptr(tmpReg, tmpReg, 100);
1359
1360 Register scrReg = rtm_counters_Reg;
1361 movptr(scrReg, Address(rtm_counters_Reg, RTMLockingCounters::total_count_offset()));
1362 imulptr(scrReg, scrReg, RTMTotalCountIncrRate);
1363 imulptr(scrReg, scrReg, RTMAbortRatio);
1364 cmpptr(tmpReg, scrReg);
1365 jccb(Assembler::below, L_check_always_rtm1);
1366 if (method_data != NULL) {
1367 // set rtm_state to "no rtm" in MDO
1368 mov_metadata(tmpReg, method_data);
1369 if (os::is_MP()) {
1370 lock();
1371 }
1372 orl(Address(tmpReg, MethodData::rtm_state_offset_in_bytes()), NoRTM);
1373 }
1374 jmpb(L_done);
1375 bind(L_check_always_rtm1);
1376 // Reload RTMLockingCounters* address
1377 lea(rtm_counters_Reg, ExternalAddress((address)rtm_counters));
1378 bind(L_check_always_rtm2);
1379 movptr(tmpReg, Address(rtm_counters_Reg, RTMLockingCounters::total_count_offset()));
1380 cmpptr(tmpReg, RTMLockingThreshold / RTMTotalCountIncrRate);
1381 jccb(Assembler::below, L_done);
1382 if (method_data != NULL) {
1383 // set rtm_state to "always rtm" in MDO
1384 mov_metadata(tmpReg, method_data);
1385 if (os::is_MP()) {
1386 lock();
1387 }
1388 orl(Address(tmpReg, MethodData::rtm_state_offset_in_bytes()), UseRTM);
1389 }
1390 bind(L_done);
1391 }
1392
1393 // Update counters and perform abort ratio calculation
1394 // input: abort_status_Reg
1395 // rtm_counters_Reg, flags are killed
1396 void MacroAssembler::rtm_profiling(Register abort_status_Reg,
1397 Register rtm_counters_Reg,
1398 RTMLockingCounters* rtm_counters,
1399 Metadata* method_data,
1400 bool profile_rtm) {
1401
1402 assert(rtm_counters != NULL, "should not be NULL when profiling RTM");
1403 // update rtm counters based on rax value at abort
1404 // reads abort_status_Reg, updates flags
1405 lea(rtm_counters_Reg, ExternalAddress((address)rtm_counters));
1406 rtm_counters_update(abort_status_Reg, rtm_counters_Reg);
1407 if (profile_rtm) {
1408 // Save abort status because abort_status_Reg is used by following code.
1409 if (RTMRetryCount > 0) {
1410 push(abort_status_Reg);
1411 }
1412 assert(rtm_counters != NULL, "should not be NULL when profiling RTM");
1413 rtm_abort_ratio_calculation(abort_status_Reg, rtm_counters_Reg, rtm_counters, method_data);
1414 // restore abort status
1415 if (RTMRetryCount > 0) {
1416 pop(abort_status_Reg);
1417 }
1418 }
1419 }
1420
1421 // Retry on abort if abort's status is 0x6: can retry (0x2) | memory conflict (0x4)
1422 // inputs: retry_count_Reg
1423 // : abort_status_Reg
1424 // output: retry_count_Reg decremented by 1
1425 // flags are killed
1426 void MacroAssembler::rtm_retry_lock_on_abort(Register retry_count_Reg, Register abort_status_Reg, Label& retryLabel) {
1427 Label doneRetry;
1428 assert(abort_status_Reg == rax, "");
1429 // The abort reason bits are in eax (see all states in rtmLocking.hpp)
1430 // 0x6 = conflict on which we can retry (0x2) | memory conflict (0x4)
1431 // if reason is in 0x6 and retry count != 0 then retry
1432 andptr(abort_status_Reg, 0x6);
1433 jccb(Assembler::zero, doneRetry);
1434 testl(retry_count_Reg, retry_count_Reg);
1435 jccb(Assembler::zero, doneRetry);
1436 pause();
1437 decrementl(retry_count_Reg);
1438 jmp(retryLabel);
1439 bind(doneRetry);
1440 }
1441
1442 // Spin and retry if lock is busy,
1443 // inputs: box_Reg (monitor address)
1444 // : retry_count_Reg
1445 // output: retry_count_Reg decremented by 1
1446 // : clear z flag if retry count exceeded
1447 // tmp_Reg, scr_Reg, flags are killed
1448 void MacroAssembler::rtm_retry_lock_on_busy(Register retry_count_Reg, Register box_Reg,
1449 Register tmp_Reg, Register scr_Reg, Label& retryLabel) {
1450 Label SpinLoop, SpinExit, doneRetry;
1451 int owner_offset = OM_OFFSET_NO_MONITOR_VALUE_TAG(owner);
1452
1453 testl(retry_count_Reg, retry_count_Reg);
1454 jccb(Assembler::zero, doneRetry);
1455 decrementl(retry_count_Reg);
1456 movptr(scr_Reg, RTMSpinLoopCount);
1457
1458 bind(SpinLoop);
1459 pause();
1460 decrementl(scr_Reg);
1461 jccb(Assembler::lessEqual, SpinExit);
1462 movptr(tmp_Reg, Address(box_Reg, owner_offset));
1463 testptr(tmp_Reg, tmp_Reg);
1464 jccb(Assembler::notZero, SpinLoop);
1465
1466 bind(SpinExit);
1467 jmp(retryLabel);
1468 bind(doneRetry);
1469 incrementl(retry_count_Reg); // clear z flag
1470 }
1471
1472 // Use RTM for normal stack locks
1473 // Input: objReg (object to lock)
1474 void MacroAssembler::rtm_stack_locking(Register objReg, Register tmpReg, Register scrReg,
1475 Register retry_on_abort_count_Reg,
1476 RTMLockingCounters* stack_rtm_counters,
1477 Metadata* method_data, bool profile_rtm,
1478 Label& DONE_LABEL, Label& IsInflated) {
1479 assert(UseRTMForStackLocks, "why call this otherwise?");
1480 assert(!UseBiasedLocking, "Biased locking is not supported with RTM locking");
1481 assert(tmpReg == rax, "");
1482 assert(scrReg == rdx, "");
1483 Label L_rtm_retry, L_decrement_retry, L_on_abort;
1484
1485 if (RTMRetryCount > 0) {
1486 movl(retry_on_abort_count_Reg, RTMRetryCount); // Retry on abort
1487 bind(L_rtm_retry);
1488 }
1489 movptr(tmpReg, Address(objReg, oopDesc::mark_offset_in_bytes()));
1490 testptr(tmpReg, markOopDesc::monitor_value); // inflated vs stack-locked|neutral|biased
1491 jcc(Assembler::notZero, IsInflated);
1492
1493 if (PrintPreciseRTMLockingStatistics || profile_rtm) {
1494 Label L_noincrement;
1495 if (RTMTotalCountIncrRate > 1) {
1496 // tmpReg, scrReg and flags are killed
1497 branch_on_random_using_rdtsc(tmpReg, scrReg, RTMTotalCountIncrRate, L_noincrement);
1498 }
1499 assert(stack_rtm_counters != NULL, "should not be NULL when profiling RTM");
1500 atomic_incptr(ExternalAddress((address)stack_rtm_counters->total_count_addr()), scrReg);
1501 bind(L_noincrement);
1502 }
1503 xbegin(L_on_abort);
1504 movptr(tmpReg, Address(objReg, oopDesc::mark_offset_in_bytes())); // fetch markword
1505 andptr(tmpReg, markOopDesc::biased_lock_mask_in_place); // look at 3 lock bits
1506 cmpptr(tmpReg, markOopDesc::unlocked_value); // bits = 001 unlocked
1507 jcc(Assembler::equal, DONE_LABEL); // all done if unlocked
1508
1509 Register abort_status_Reg = tmpReg; // status of abort is stored in RAX
1510 if (UseRTMXendForLockBusy) {
1511 xend();
1512 movptr(abort_status_Reg, 0x2); // Set the abort status to 2 (so we can retry)
1513 jmp(L_decrement_retry);
1514 }
1515 else {
1516 xabort(0);
1517 }
1518 bind(L_on_abort);
1519 if (PrintPreciseRTMLockingStatistics || profile_rtm) {
1520 rtm_profiling(abort_status_Reg, scrReg, stack_rtm_counters, method_data, profile_rtm);
1521 }
1522 bind(L_decrement_retry);
1523 if (RTMRetryCount > 0) {
1524 // retry on lock abort if abort status is 'can retry' (0x2) or 'memory conflict' (0x4)
1525 rtm_retry_lock_on_abort(retry_on_abort_count_Reg, abort_status_Reg, L_rtm_retry);
1526 }
1527 }
1528
1529 // Use RTM for inflating locks
1530 // inputs: objReg (object to lock)
1531 // boxReg (on-stack box address (displaced header location) - KILLED)
1532 // tmpReg (ObjectMonitor address + markOopDesc::monitor_value)
1533 void MacroAssembler::rtm_inflated_locking(Register objReg, Register boxReg, Register tmpReg,
1534 Register scrReg, Register retry_on_busy_count_Reg,
1535 Register retry_on_abort_count_Reg,
1536 RTMLockingCounters* rtm_counters,
1537 Metadata* method_data, bool profile_rtm,
1538 Label& DONE_LABEL) {
1539 assert(UseRTMLocking, "why call this otherwise?");
1540 assert(tmpReg == rax, "");
1541 assert(scrReg == rdx, "");
1542 Label L_rtm_retry, L_decrement_retry, L_on_abort;
1543 int owner_offset = OM_OFFSET_NO_MONITOR_VALUE_TAG(owner);
1544
1545 // Without cast to int32_t a movptr will destroy r10 which is typically obj
1546 movptr(Address(boxReg, 0), (int32_t)intptr_t(markOopDesc::unused_mark()));
1547 movptr(boxReg, tmpReg); // Save ObjectMonitor address
1548
1549 if (RTMRetryCount > 0) {
1550 movl(retry_on_busy_count_Reg, RTMRetryCount); // Retry on lock busy
1551 movl(retry_on_abort_count_Reg, RTMRetryCount); // Retry on abort
1552 bind(L_rtm_retry);
1553 }
1554 if (PrintPreciseRTMLockingStatistics || profile_rtm) {
1555 Label L_noincrement;
1556 if (RTMTotalCountIncrRate > 1) {
1557 // tmpReg, scrReg and flags are killed
1558 branch_on_random_using_rdtsc(tmpReg, scrReg, RTMTotalCountIncrRate, L_noincrement);
1559 }
1560 assert(rtm_counters != NULL, "should not be NULL when profiling RTM");
1561 atomic_incptr(ExternalAddress((address)rtm_counters->total_count_addr()), scrReg);
1562 bind(L_noincrement);
1563 }
1564 xbegin(L_on_abort);
1565 movptr(tmpReg, Address(objReg, oopDesc::mark_offset_in_bytes()));
1566 movptr(tmpReg, Address(tmpReg, owner_offset));
1567 testptr(tmpReg, tmpReg);
1568 jcc(Assembler::zero, DONE_LABEL);
1569 if (UseRTMXendForLockBusy) {
1570 xend();
1571 jmp(L_decrement_retry);
1572 }
1573 else {
1574 xabort(0);
1575 }
1576 bind(L_on_abort);
1577 Register abort_status_Reg = tmpReg; // status of abort is stored in RAX
1578 if (PrintPreciseRTMLockingStatistics || profile_rtm) {
1579 rtm_profiling(abort_status_Reg, scrReg, rtm_counters, method_data, profile_rtm);
1580 }
1581 if (RTMRetryCount > 0) {
1582 // retry on lock abort if abort status is 'can retry' (0x2) or 'memory conflict' (0x4)
1583 rtm_retry_lock_on_abort(retry_on_abort_count_Reg, abort_status_Reg, L_rtm_retry);
1584 }
1585
1586 movptr(tmpReg, Address(boxReg, owner_offset)) ;
1587 testptr(tmpReg, tmpReg) ;
1588 jccb(Assembler::notZero, L_decrement_retry) ;
1589
1590 // Appears unlocked - try to swing _owner from null to non-null.
1591 // Invariant: tmpReg == 0. tmpReg is EAX which is the implicit cmpxchg comparand.
1592 #ifdef _LP64
1593 Register threadReg = r15_thread;
1594 #else
1595 get_thread(scrReg);
1596 Register threadReg = scrReg;
1597 #endif
1598 if (os::is_MP()) {
1599 lock();
1600 }
1601 cmpxchgptr(threadReg, Address(boxReg, owner_offset)); // Updates tmpReg
1602
1603 if (RTMRetryCount > 0) {
1604 // success done else retry
1605 jccb(Assembler::equal, DONE_LABEL) ;
1606 bind(L_decrement_retry);
1607 // Spin and retry if lock is busy.
1608 rtm_retry_lock_on_busy(retry_on_busy_count_Reg, boxReg, tmpReg, scrReg, L_rtm_retry);
1609 }
1610 else {
1611 bind(L_decrement_retry);
1612 }
1613 }
1614
1615 #endif // INCLUDE_RTM_OPT
1616
1617 // Fast_Lock and Fast_Unlock used by C2
1618
1619 // Because the transitions from emitted code to the runtime
1620 // monitorenter/exit helper stubs are so slow it's critical that
1621 // we inline both the stack-locking fast-path and the inflated fast path.
1622 //
1623 // See also: cmpFastLock and cmpFastUnlock.
1624 //
1625 // What follows is a specialized inline transliteration of the code
1626 // in slow_enter() and slow_exit(). If we're concerned about I$ bloat
1627 // another option would be to emit TrySlowEnter and TrySlowExit methods
1628 // at startup-time. These methods would accept arguments as
1629 // (rax,=Obj, rbx=Self, rcx=box, rdx=Scratch) and return success-failure
1630 // indications in the icc.ZFlag. Fast_Lock and Fast_Unlock would simply
1631 // marshal the arguments and emit calls to TrySlowEnter and TrySlowExit.
1632 // In practice, however, the # of lock sites is bounded and is usually small.
1633 // Besides the call overhead, TrySlowEnter and TrySlowExit might suffer
1634 // if the processor uses simple bimodal branch predictors keyed by EIP
1635 // Since the helper routines would be called from multiple synchronization
1636 // sites.
1637 //
1638 // An even better approach would be write "MonitorEnter()" and "MonitorExit()"
1639 // in java - using j.u.c and unsafe - and just bind the lock and unlock sites
1640 // to those specialized methods. That'd give us a mostly platform-independent
1641 // implementation that the JITs could optimize and inline at their pleasure.
1642 // Done correctly, the only time we'd need to cross to native could would be
1643 // to park() or unpark() threads. We'd also need a few more unsafe operators
1644 // to (a) prevent compiler-JIT reordering of non-volatile accesses, and
1645 // (b) explicit barriers or fence operations.
1646 //
1647 // TODO:
1648 //
1649 // * Arrange for C2 to pass "Self" into Fast_Lock and Fast_Unlock in one of the registers (scr).
1650 // This avoids manifesting the Self pointer in the Fast_Lock and Fast_Unlock terminals.
1651 // Given TLAB allocation, Self is usually manifested in a register, so passing it into
1652 // the lock operators would typically be faster than reifying Self.
1653 //
1654 // * Ideally I'd define the primitives as:
1655 // fast_lock (nax Obj, nax box, EAX tmp, nax scr) where box, tmp and scr are KILLED.
1656 // fast_unlock (nax Obj, EAX box, nax tmp) where box and tmp are KILLED
1657 // Unfortunately ADLC bugs prevent us from expressing the ideal form.
1658 // Instead, we're stuck with a rather awkward and brittle register assignments below.
1659 // Furthermore the register assignments are overconstrained, possibly resulting in
1660 // sub-optimal code near the synchronization site.
1661 //
1662 // * Eliminate the sp-proximity tests and just use "== Self" tests instead.
1663 // Alternately, use a better sp-proximity test.
1664 //
1665 // * Currently ObjectMonitor._Owner can hold either an sp value or a (THREAD *) value.
1666 // Either one is sufficient to uniquely identify a thread.
1667 // TODO: eliminate use of sp in _owner and use get_thread(tr) instead.
1668 //
1669 // * Intrinsify notify() and notifyAll() for the common cases where the
1670 // object is locked by the calling thread but the waitlist is empty.
1671 // avoid the expensive JNI call to JVM_Notify() and JVM_NotifyAll().
1672 //
1673 // * use jccb and jmpb instead of jcc and jmp to improve code density.
1674 // But beware of excessive branch density on AMD Opterons.
1675 //
1676 // * Both Fast_Lock and Fast_Unlock set the ICC.ZF to indicate success
1677 // or failure of the fast-path. If the fast-path fails then we pass
1678 // control to the slow-path, typically in C. In Fast_Lock and
1679 // Fast_Unlock we often branch to DONE_LABEL, just to find that C2
1680 // will emit a conditional branch immediately after the node.
1681 // So we have branches to branches and lots of ICC.ZF games.
1682 // Instead, it might be better to have C2 pass a "FailureLabel"
1683 // into Fast_Lock and Fast_Unlock. In the case of success, control
1684 // will drop through the node. ICC.ZF is undefined at exit.
1685 // In the case of failure, the node will branch directly to the
1686 // FailureLabel
1687
1688
1689 // obj: object to lock
1690 // box: on-stack box address (displaced header location) - KILLED
1691 // rax,: tmp -- KILLED
1692 // scr: tmp -- KILLED
1693 void MacroAssembler::fast_lock(Register objReg, Register boxReg, Register tmpReg,
1694 Register scrReg, Register cx1Reg, Register cx2Reg,
1695 BiasedLockingCounters* counters,
1696 RTMLockingCounters* rtm_counters,
1697 RTMLockingCounters* stack_rtm_counters,
1698 Metadata* method_data,
1699 bool use_rtm, bool profile_rtm) {
1700 // Ensure the register assignments are disjoint
1701 assert(tmpReg == rax, "");
1702
1703 if (use_rtm) {
1704 assert_different_registers(objReg, boxReg, tmpReg, scrReg, cx1Reg, cx2Reg);
1705 } else {
1706 assert(cx1Reg == noreg, "");
1707 assert(cx2Reg == noreg, "");
1708 assert_different_registers(objReg, boxReg, tmpReg, scrReg);
1709 }
1710
1711 if (counters != NULL) {
1712 atomic_incl(ExternalAddress((address)counters->total_entry_count_addr()), scrReg);
1713 }
1714 if (EmitSync & 1) {
1715 // set box->dhw = markOopDesc::unused_mark()
1716 // Force all sync thru slow-path: slow_enter() and slow_exit()
1717 movptr (Address(boxReg, 0), (int32_t)intptr_t(markOopDesc::unused_mark()));
1718 cmpptr (rsp, (int32_t)NULL_WORD);
1719 } else {
1720 // Possible cases that we'll encounter in fast_lock
1721 // ------------------------------------------------
1722 // * Inflated
1723 // -- unlocked
1724 // -- Locked
1725 // = by self
1726 // = by other
1727 // * biased
1728 // -- by Self
1729 // -- by other
1730 // * neutral
1731 // * stack-locked
1732 // -- by self
1733 // = sp-proximity test hits
1734 // = sp-proximity test generates false-negative
1735 // -- by other
1736 //
1737
1738 Label IsInflated, DONE_LABEL;
1739
1740 // it's stack-locked, biased or neutral
1741 // TODO: optimize away redundant LDs of obj->mark and improve the markword triage
1742 // order to reduce the number of conditional branches in the most common cases.
1743 // Beware -- there's a subtle invariant that fetch of the markword
1744 // at [FETCH], below, will never observe a biased encoding (*101b).
1745 // If this invariant is not held we risk exclusion (safety) failure.
1746 if (UseBiasedLocking && !UseOptoBiasInlining) {
1747 biased_locking_enter(boxReg, objReg, tmpReg, scrReg, false, DONE_LABEL, NULL, counters);
1748 }
1749
1750 #if INCLUDE_RTM_OPT
1751 if (UseRTMForStackLocks && use_rtm) {
1752 rtm_stack_locking(objReg, tmpReg, scrReg, cx2Reg,
1753 stack_rtm_counters, method_data, profile_rtm,
1754 DONE_LABEL, IsInflated);
1755 }
1756 #endif // INCLUDE_RTM_OPT
1757
1758 movptr(tmpReg, Address(objReg, oopDesc::mark_offset_in_bytes())); // [FETCH]
1759 testptr(tmpReg, markOopDesc::monitor_value); // inflated vs stack-locked|neutral|biased
1760 jccb(Assembler::notZero, IsInflated);
1761
1762 // Attempt stack-locking ...
1763 orptr (tmpReg, markOopDesc::unlocked_value);
1764 movptr(Address(boxReg, 0), tmpReg); // Anticipate successful CAS
1765 if (os::is_MP()) {
1766 lock();
1767 }
1768 cmpxchgptr(boxReg, Address(objReg, oopDesc::mark_offset_in_bytes())); // Updates tmpReg
1769 if (counters != NULL) {
1770 cond_inc32(Assembler::equal,
1771 ExternalAddress((address)counters->fast_path_entry_count_addr()));
1772 }
1773 jcc(Assembler::equal, DONE_LABEL); // Success
1774
1775 // Recursive locking.
1776 // The object is stack-locked: markword contains stack pointer to BasicLock.
1777 // Locked by current thread if difference with current SP is less than one page.
1778 subptr(tmpReg, rsp);
1779 // Next instruction set ZFlag == 1 (Success) if difference is less then one page.
1780 andptr(tmpReg, (int32_t) (NOT_LP64(0xFFFFF003) LP64_ONLY(7 - os::vm_page_size())) );
1781 movptr(Address(boxReg, 0), tmpReg);
1782 if (counters != NULL) {
1783 cond_inc32(Assembler::equal,
1784 ExternalAddress((address)counters->fast_path_entry_count_addr()));
1785 }
1786 jmp(DONE_LABEL);
1787
1788 bind(IsInflated);
1789 // The object is inflated. tmpReg contains pointer to ObjectMonitor* + markOopDesc::monitor_value
1790
1791 #if INCLUDE_RTM_OPT
1792 // Use the same RTM locking code in 32- and 64-bit VM.
1793 if (use_rtm) {
1794 rtm_inflated_locking(objReg, boxReg, tmpReg, scrReg, cx1Reg, cx2Reg,
1795 rtm_counters, method_data, profile_rtm, DONE_LABEL);
1796 } else {
1797 #endif // INCLUDE_RTM_OPT
1798
1799 #ifndef _LP64
1800 // The object is inflated.
1801
1802 // boxReg refers to the on-stack BasicLock in the current frame.
1803 // We'd like to write:
1804 // set box->_displaced_header = markOopDesc::unused_mark(). Any non-0 value suffices.
1805 // This is convenient but results a ST-before-CAS penalty. The following CAS suffers
1806 // additional latency as we have another ST in the store buffer that must drain.
1807
1808 if (EmitSync & 8192) {
1809 movptr(Address(boxReg, 0), 3); // results in ST-before-CAS penalty
1810 get_thread (scrReg);
1811 movptr(boxReg, tmpReg); // consider: LEA box, [tmp-2]
1812 movptr(tmpReg, NULL_WORD); // consider: xor vs mov
1813 if (os::is_MP()) {
1814 lock();
1815 }
1816 cmpxchgptr(scrReg, Address(boxReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)));
1817 } else
1818 if ((EmitSync & 128) == 0) { // avoid ST-before-CAS
1819 // register juggle because we need tmpReg for cmpxchgptr below
1820 movptr(scrReg, boxReg);
1821 movptr(boxReg, tmpReg); // consider: LEA box, [tmp-2]
1822
1823 // Using a prefetchw helps avoid later RTS->RTO upgrades and cache probes
1824 if ((EmitSync & 2048) && VM_Version::supports_3dnow_prefetch() && os::is_MP()) {
1825 // prefetchw [eax + Offset(_owner)-2]
1826 prefetchw(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)));
1827 }
1828
1829 if ((EmitSync & 64) == 0) {
1830 // Optimistic form: consider XORL tmpReg,tmpReg
1831 movptr(tmpReg, NULL_WORD);
1832 } else {
1833 // Can suffer RTS->RTO upgrades on shared or cold $ lines
1834 // Test-And-CAS instead of CAS
1835 movptr(tmpReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); // rax, = m->_owner
1836 testptr(tmpReg, tmpReg); // Locked ?
1837 jccb (Assembler::notZero, DONE_LABEL);
1838 }
1839
1840 // Appears unlocked - try to swing _owner from null to non-null.
1841 // Ideally, I'd manifest "Self" with get_thread and then attempt
1842 // to CAS the register containing Self into m->Owner.
1843 // But we don't have enough registers, so instead we can either try to CAS
1844 // rsp or the address of the box (in scr) into &m->owner. If the CAS succeeds
1845 // we later store "Self" into m->Owner. Transiently storing a stack address
1846 // (rsp or the address of the box) into m->owner is harmless.
1847 // Invariant: tmpReg == 0. tmpReg is EAX which is the implicit cmpxchg comparand.
1848 if (os::is_MP()) {
1849 lock();
1850 }
1851 cmpxchgptr(scrReg, Address(boxReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)));
1852 movptr(Address(scrReg, 0), 3); // box->_displaced_header = 3
1853 // If we weren't able to swing _owner from NULL to the BasicLock
1854 // then take the slow path.
1855 jccb (Assembler::notZero, DONE_LABEL);
1856 // update _owner from BasicLock to thread
1857 get_thread (scrReg); // beware: clobbers ICCs
1858 movptr(Address(boxReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), scrReg);
1859 xorptr(boxReg, boxReg); // set icc.ZFlag = 1 to indicate success
1860
1861 // If the CAS fails we can either retry or pass control to the slow-path.
1862 // We use the latter tactic.
1863 // Pass the CAS result in the icc.ZFlag into DONE_LABEL
1864 // If the CAS was successful ...
1865 // Self has acquired the lock
1866 // Invariant: m->_recursions should already be 0, so we don't need to explicitly set it.
1867 // Intentional fall-through into DONE_LABEL ...
1868 } else {
1869 movptr(Address(boxReg, 0), intptr_t(markOopDesc::unused_mark())); // results in ST-before-CAS penalty
1870 movptr(boxReg, tmpReg);
1871
1872 // Using a prefetchw helps avoid later RTS->RTO upgrades and cache probes
1873 if ((EmitSync & 2048) && VM_Version::supports_3dnow_prefetch() && os::is_MP()) {
1874 // prefetchw [eax + Offset(_owner)-2]
1875 prefetchw(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)));
1876 }
1877
1878 if ((EmitSync & 64) == 0) {
1879 // Optimistic form
1880 xorptr (tmpReg, tmpReg);
1881 } else {
1882 // Can suffer RTS->RTO upgrades on shared or cold $ lines
1883 movptr(tmpReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); // rax, = m->_owner
1884 testptr(tmpReg, tmpReg); // Locked ?
1885 jccb (Assembler::notZero, DONE_LABEL);
1886 }
1887
1888 // Appears unlocked - try to swing _owner from null to non-null.
1889 // Use either "Self" (in scr) or rsp as thread identity in _owner.
1890 // Invariant: tmpReg == 0. tmpReg is EAX which is the implicit cmpxchg comparand.
1891 get_thread (scrReg);
1892 if (os::is_MP()) {
1893 lock();
1894 }
1895 cmpxchgptr(scrReg, Address(boxReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)));
1896
1897 // If the CAS fails we can either retry or pass control to the slow-path.
1898 // We use the latter tactic.
1899 // Pass the CAS result in the icc.ZFlag into DONE_LABEL
1900 // If the CAS was successful ...
1901 // Self has acquired the lock
1902 // Invariant: m->_recursions should already be 0, so we don't need to explicitly set it.
1903 // Intentional fall-through into DONE_LABEL ...
1904 }
1905 #else // _LP64
1906 // It's inflated
1907 movq(scrReg, tmpReg);
1908 xorq(tmpReg, tmpReg);
1909
1910 if (os::is_MP()) {
1911 lock();
1912 }
1913 cmpxchgptr(r15_thread, Address(scrReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)));
1914 // Unconditionally set box->_displaced_header = markOopDesc::unused_mark().
1915 // Without cast to int32_t movptr will destroy r10 which is typically obj.
1916 movptr(Address(boxReg, 0), (int32_t)intptr_t(markOopDesc::unused_mark()));
1917 // Intentional fall-through into DONE_LABEL ...
1918 // Propagate ICC.ZF from CAS above into DONE_LABEL.
1919 #endif // _LP64
1920 #if INCLUDE_RTM_OPT
1921 } // use_rtm()
1922 #endif
1923 // DONE_LABEL is a hot target - we'd really like to place it at the
1924 // start of cache line by padding with NOPs.
1925 // See the AMD and Intel software optimization manuals for the
1926 // most efficient "long" NOP encodings.
1927 // Unfortunately none of our alignment mechanisms suffice.
1928 bind(DONE_LABEL);
1929
1930 // At DONE_LABEL the icc ZFlag is set as follows ...
1931 // Fast_Unlock uses the same protocol.
1932 // ZFlag == 1 -> Success
1933 // ZFlag == 0 -> Failure - force control through the slow-path
1934 }
1935 }
1936
1937 // obj: object to unlock
1938 // box: box address (displaced header location), killed. Must be EAX.
1939 // tmp: killed, cannot be obj nor box.
1940 //
1941 // Some commentary on balanced locking:
1942 //
1943 // Fast_Lock and Fast_Unlock are emitted only for provably balanced lock sites.
1944 // Methods that don't have provably balanced locking are forced to run in the
1945 // interpreter - such methods won't be compiled to use fast_lock and fast_unlock.
1946 // The interpreter provides two properties:
1947 // I1: At return-time the interpreter automatically and quietly unlocks any
1948 // objects acquired the current activation (frame). Recall that the
1949 // interpreter maintains an on-stack list of locks currently held by
1950 // a frame.
1951 // I2: If a method attempts to unlock an object that is not held by the
1952 // the frame the interpreter throws IMSX.
1953 //
1954 // Lets say A(), which has provably balanced locking, acquires O and then calls B().
1955 // B() doesn't have provably balanced locking so it runs in the interpreter.
1956 // Control returns to A() and A() unlocks O. By I1 and I2, above, we know that O
1957 // is still locked by A().
1958 //
1959 // The only other source of unbalanced locking would be JNI. The "Java Native Interface:
1960 // Programmer's Guide and Specification" claims that an object locked by jni_monitorenter
1961 // should not be unlocked by "normal" java-level locking and vice-versa. The specification
1962 // doesn't specify what will occur if a program engages in such mixed-mode locking, however.
1963 // Arguably given that the spec legislates the JNI case as undefined our implementation
1964 // could reasonably *avoid* checking owner in Fast_Unlock().
1965 // In the interest of performance we elide m->Owner==Self check in unlock.
1966 // A perfectly viable alternative is to elide the owner check except when
1967 // Xcheck:jni is enabled.
1968
1969 void MacroAssembler::fast_unlock(Register objReg, Register boxReg, Register tmpReg, bool use_rtm) {
1970 assert(boxReg == rax, "");
1971 assert_different_registers(objReg, boxReg, tmpReg);
1972
1973 if (EmitSync & 4) {
1974 // Disable - inhibit all inlining. Force control through the slow-path
1975 cmpptr (rsp, 0);
1976 } else {
1977 Label DONE_LABEL, Stacked, CheckSucc;
1978
1979 // Critically, the biased locking test must have precedence over
1980 // and appear before the (box->dhw == 0) recursive stack-lock test.
1981 if (UseBiasedLocking && !UseOptoBiasInlining) {
1982 biased_locking_exit(objReg, tmpReg, DONE_LABEL);
1983 }
1984
1985 #if INCLUDE_RTM_OPT
1986 if (UseRTMForStackLocks && use_rtm) {
1987 assert(!UseBiasedLocking, "Biased locking is not supported with RTM locking");
1988 Label L_regular_unlock;
1989 movptr(tmpReg, Address(objReg, oopDesc::mark_offset_in_bytes())); // fetch markword
1990 andptr(tmpReg, markOopDesc::biased_lock_mask_in_place); // look at 3 lock bits
1991 cmpptr(tmpReg, markOopDesc::unlocked_value); // bits = 001 unlocked
1992 jccb(Assembler::notEqual, L_regular_unlock); // if !HLE RegularLock
1993 xend(); // otherwise end...
1994 jmp(DONE_LABEL); // ... and we're done
1995 bind(L_regular_unlock);
1996 }
1997 #endif
1998
1999 cmpptr(Address(boxReg, 0), (int32_t)NULL_WORD); // Examine the displaced header
2000 jcc (Assembler::zero, DONE_LABEL); // 0 indicates recursive stack-lock
2001 movptr(tmpReg, Address(objReg, oopDesc::mark_offset_in_bytes())); // Examine the object's markword
2002 testptr(tmpReg, markOopDesc::monitor_value); // Inflated?
2003 jccb (Assembler::zero, Stacked);
2004
2005 // It's inflated.
2006 #if INCLUDE_RTM_OPT
2007 if (use_rtm) {
2008 Label L_regular_inflated_unlock;
2009 int owner_offset = OM_OFFSET_NO_MONITOR_VALUE_TAG(owner);
2010 movptr(boxReg, Address(tmpReg, owner_offset));
2011 testptr(boxReg, boxReg);
2012 jccb(Assembler::notZero, L_regular_inflated_unlock);
2013 xend();
2014 jmpb(DONE_LABEL);
2015 bind(L_regular_inflated_unlock);
2016 }
2017 #endif
2018
2019 // Despite our balanced locking property we still check that m->_owner == Self
2020 // as java routines or native JNI code called by this thread might
2021 // have released the lock.
2022 // Refer to the comments in synchronizer.cpp for how we might encode extra
2023 // state in _succ so we can avoid fetching EntryList|cxq.
2024 //
2025 // I'd like to add more cases in fast_lock() and fast_unlock() --
2026 // such as recursive enter and exit -- but we have to be wary of
2027 // I$ bloat, T$ effects and BP$ effects.
2028 //
2029 // If there's no contention try a 1-0 exit. That is, exit without
2030 // a costly MEMBAR or CAS. See synchronizer.cpp for details on how
2031 // we detect and recover from the race that the 1-0 exit admits.
2032 //
2033 // Conceptually Fast_Unlock() must execute a STST|LDST "release" barrier
2034 // before it STs null into _owner, releasing the lock. Updates
2035 // to data protected by the critical section must be visible before
2036 // we drop the lock (and thus before any other thread could acquire
2037 // the lock and observe the fields protected by the lock).
2038 // IA32's memory-model is SPO, so STs are ordered with respect to
2039 // each other and there's no need for an explicit barrier (fence).
2040 // See also http://gee.cs.oswego.edu/dl/jmm/cookbook.html.
2041 #ifndef _LP64
2042 get_thread (boxReg);
2043 if ((EmitSync & 4096) && VM_Version::supports_3dnow_prefetch() && os::is_MP()) {
2044 // prefetchw [ebx + Offset(_owner)-2]
2045 prefetchw(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)));
2046 }
2047
2048 // Note that we could employ various encoding schemes to reduce
2049 // the number of loads below (currently 4) to just 2 or 3.
2050 // Refer to the comments in synchronizer.cpp.
2051 // In practice the chain of fetches doesn't seem to impact performance, however.
2052 xorptr(boxReg, boxReg);
2053 if ((EmitSync & 65536) == 0 && (EmitSync & 256)) {
2054 // Attempt to reduce branch density - AMD's branch predictor.
2055 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(recursions)));
2056 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(EntryList)));
2057 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(cxq)));
2058 jccb (Assembler::notZero, DONE_LABEL);
2059 movptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), NULL_WORD);
2060 jmpb (DONE_LABEL);
2061 } else {
2062 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(recursions)));
2063 jccb (Assembler::notZero, DONE_LABEL);
2064 movptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(EntryList)));
2065 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(cxq)));
2066 jccb (Assembler::notZero, CheckSucc);
2067 movptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), NULL_WORD);
2068 jmpb (DONE_LABEL);
2069 }
2070
2071 // The Following code fragment (EmitSync & 65536) improves the performance of
2072 // contended applications and contended synchronization microbenchmarks.
2073 // Unfortunately the emission of the code - even though not executed - causes regressions
2074 // in scimark and jetstream, evidently because of $ effects. Replacing the code
2075 // with an equal number of never-executed NOPs results in the same regression.
2076 // We leave it off by default.
2077
2078 if ((EmitSync & 65536) != 0) {
2079 Label LSuccess, LGoSlowPath ;
2080
2081 bind (CheckSucc);
2082
2083 // Optional pre-test ... it's safe to elide this
2084 cmpptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(succ)), (int32_t)NULL_WORD);
2085 jccb(Assembler::zero, LGoSlowPath);
2086
2087 // We have a classic Dekker-style idiom:
2088 // ST m->_owner = 0 ; MEMBAR; LD m->_succ
2089 // There are a number of ways to implement the barrier:
2090 // (1) lock:andl &m->_owner, 0
2091 // is fast, but mask doesn't currently support the "ANDL M,IMM32" form.
2092 // LOCK: ANDL [ebx+Offset(_Owner)-2], 0
2093 // Encodes as 81 31 OFF32 IMM32 or 83 63 OFF8 IMM8
2094 // (2) If supported, an explicit MFENCE is appealing.
2095 // In older IA32 processors MFENCE is slower than lock:add or xchg
2096 // particularly if the write-buffer is full as might be the case if
2097 // if stores closely precede the fence or fence-equivalent instruction.
2098 // See https://blogs.oracle.com/dave/entry/instruction_selection_for_volatile_fences
2099 // as the situation has changed with Nehalem and Shanghai.
2100 // (3) In lieu of an explicit fence, use lock:addl to the top-of-stack
2101 // The $lines underlying the top-of-stack should be in M-state.
2102 // The locked add instruction is serializing, of course.
2103 // (4) Use xchg, which is serializing
2104 // mov boxReg, 0; xchgl boxReg, [tmpReg + Offset(_owner)-2] also works
2105 // (5) ST m->_owner = 0 and then execute lock:orl &m->_succ, 0.
2106 // The integer condition codes will tell us if succ was 0.
2107 // Since _succ and _owner should reside in the same $line and
2108 // we just stored into _owner, it's likely that the $line
2109 // remains in M-state for the lock:orl.
2110 //
2111 // We currently use (3), although it's likely that switching to (2)
2112 // is correct for the future.
2113
2114 movptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), NULL_WORD);
2115 if (os::is_MP()) {
2116 lock(); addptr(Address(rsp, 0), 0);
2117 }
2118 // Ratify _succ remains non-null
2119 cmpptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(succ)), 0);
2120 jccb (Assembler::notZero, LSuccess);
2121
2122 xorptr(boxReg, boxReg); // box is really EAX
2123 if (os::is_MP()) { lock(); }
2124 cmpxchgptr(rsp, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)));
2125 // There's no successor so we tried to regrab the lock with the
2126 // placeholder value. If that didn't work, then another thread
2127 // grabbed the lock so we're done (and exit was a success).
2128 jccb (Assembler::notEqual, LSuccess);
2129 // Since we're low on registers we installed rsp as a placeholding in _owner.
2130 // Now install Self over rsp. This is safe as we're transitioning from
2131 // non-null to non=null
2132 get_thread (boxReg);
2133 movptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), boxReg);
2134 // Intentional fall-through into LGoSlowPath ...
2135
2136 bind (LGoSlowPath);
2137 orptr(boxReg, 1); // set ICC.ZF=0 to indicate failure
2138 jmpb (DONE_LABEL);
2139
2140 bind (LSuccess);
2141 xorptr(boxReg, boxReg); // set ICC.ZF=1 to indicate success
2142 jmpb (DONE_LABEL);
2143 }
2144
2145 bind (Stacked);
2146 // It's not inflated and it's not recursively stack-locked and it's not biased.
2147 // It must be stack-locked.
2148 // Try to reset the header to displaced header.
2149 // The "box" value on the stack is stable, so we can reload
2150 // and be assured we observe the same value as above.
2151 movptr(tmpReg, Address(boxReg, 0));
2152 if (os::is_MP()) {
2153 lock();
2154 }
2155 cmpxchgptr(tmpReg, Address(objReg, oopDesc::mark_offset_in_bytes())); // Uses RAX which is box
2156 // Intention fall-thru into DONE_LABEL
2157
2158 // DONE_LABEL is a hot target - we'd really like to place it at the
2159 // start of cache line by padding with NOPs.
2160 // See the AMD and Intel software optimization manuals for the
2161 // most efficient "long" NOP encodings.
2162 // Unfortunately none of our alignment mechanisms suffice.
2163 if ((EmitSync & 65536) == 0) {
2164 bind (CheckSucc);
2165 }
2166 #else // _LP64
2167 // It's inflated
2168 if (EmitSync & 1024) {
2169 // Emit code to check that _owner == Self
2170 // We could fold the _owner test into subsequent code more efficiently
2171 // than using a stand-alone check, but since _owner checking is off by
2172 // default we don't bother. We also might consider predicating the
2173 // _owner==Self check on Xcheck:jni or running on a debug build.
2174 movptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)));
2175 xorptr(boxReg, r15_thread);
2176 } else {
2177 xorptr(boxReg, boxReg);
2178 }
2179 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(recursions)));
2180 jccb (Assembler::notZero, DONE_LABEL);
2181 movptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(cxq)));
2182 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(EntryList)));
2183 jccb (Assembler::notZero, CheckSucc);
2184 movptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), (int32_t)NULL_WORD);
2185 jmpb (DONE_LABEL);
2186
2187 if ((EmitSync & 65536) == 0) {
2188 // Try to avoid passing control into the slow_path ...
2189 Label LSuccess, LGoSlowPath ;
2190 bind (CheckSucc);
2191
2192 // The following optional optimization can be elided if necessary
2193 // Effectively: if (succ == null) goto SlowPath
2194 // The code reduces the window for a race, however,
2195 // and thus benefits performance.
2196 cmpptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(succ)), (int32_t)NULL_WORD);
2197 jccb (Assembler::zero, LGoSlowPath);
2198
2199 xorptr(boxReg, boxReg);
2200 if ((EmitSync & 16) && os::is_MP()) {
2201 xchgptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)));
2202 } else {
2203 movptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), (int32_t)NULL_WORD);
2204 if (os::is_MP()) {
2205 // Memory barrier/fence
2206 // Dekker pivot point -- fulcrum : ST Owner; MEMBAR; LD Succ
2207 // Instead of MFENCE we use a dummy locked add of 0 to the top-of-stack.
2208 // This is faster on Nehalem and AMD Shanghai/Barcelona.
2209 // See https://blogs.oracle.com/dave/entry/instruction_selection_for_volatile_fences
2210 // We might also restructure (ST Owner=0;barrier;LD _Succ) to
2211 // (mov box,0; xchgq box, &m->Owner; LD _succ) .
2212 lock(); addl(Address(rsp, 0), 0);
2213 }
2214 }
2215 cmpptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(succ)), (int32_t)NULL_WORD);
2216 jccb (Assembler::notZero, LSuccess);
2217
2218 // Rare inopportune interleaving - race.
2219 // The successor vanished in the small window above.
2220 // The lock is contended -- (cxq|EntryList) != null -- and there's no apparent successor.
2221 // We need to ensure progress and succession.
2222 // Try to reacquire the lock.
2223 // If that fails then the new owner is responsible for succession and this
2224 // thread needs to take no further action and can exit via the fast path (success).
2225 // If the re-acquire succeeds then pass control into the slow path.
2226 // As implemented, this latter mode is horrible because we generated more
2227 // coherence traffic on the lock *and* artifically extended the critical section
2228 // length while by virtue of passing control into the slow path.
2229
2230 // box is really RAX -- the following CMPXCHG depends on that binding
2231 // cmpxchg R,[M] is equivalent to rax = CAS(M,rax,R)
2232 if (os::is_MP()) { lock(); }
2233 cmpxchgptr(r15_thread, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)));
2234 // There's no successor so we tried to regrab the lock.
2235 // If that didn't work, then another thread grabbed the
2236 // lock so we're done (and exit was a success).
2237 jccb (Assembler::notEqual, LSuccess);
2238 // Intentional fall-through into slow-path
2239
2240 bind (LGoSlowPath);
2241 orl (boxReg, 1); // set ICC.ZF=0 to indicate failure
2242 jmpb (DONE_LABEL);
2243
2244 bind (LSuccess);
2245 testl (boxReg, 0); // set ICC.ZF=1 to indicate success
2246 jmpb (DONE_LABEL);
2247 }
2248
2249 bind (Stacked);
2250 movptr(tmpReg, Address (boxReg, 0)); // re-fetch
2251 if (os::is_MP()) { lock(); }
2252 cmpxchgptr(tmpReg, Address(objReg, oopDesc::mark_offset_in_bytes())); // Uses RAX which is box
2253
2254 if (EmitSync & 65536) {
2255 bind (CheckSucc);
2256 }
2257 #endif
2258 bind(DONE_LABEL);
2259 }
2260 }
2261 #endif // COMPILER2
2262
2263 void MacroAssembler::c2bool(Register x) {
2264 // implements x == 0 ? 0 : 1
2265 // note: must only look at least-significant byte of x
2266 // since C-style booleans are stored in one byte
2267 // only! (was bug)
2268 andl(x, 0xFF);
2269 setb(Assembler::notZero, x);
2270 }
2271
2272 // Wouldn't need if AddressLiteral version had new name
2273 void MacroAssembler::call(Label& L, relocInfo::relocType rtype) {
2274 Assembler::call(L, rtype);
2275 }
2276
2277 void MacroAssembler::call(Register entry) {
2278 Assembler::call(entry);
2279 }
2280
2281 void MacroAssembler::call(AddressLiteral entry) {
2282 if (reachable(entry)) {
2283 Assembler::call_literal(entry.target(), entry.rspec());
2284 } else {
2285 lea(rscratch1, entry);
2286 Assembler::call(rscratch1);
2287 }
2288 }
2289
2290 void MacroAssembler::ic_call(address entry, jint method_index) {
2291 RelocationHolder rh = virtual_call_Relocation::spec(pc(), method_index);
2292 movptr(rax, (intptr_t)Universe::non_oop_word());
2293 call(AddressLiteral(entry, rh));
2294 }
2295
2296 // Implementation of call_VM versions
2297
2298 void MacroAssembler::call_VM(Register oop_result,
2299 address entry_point,
2300 bool check_exceptions) {
2301 Label C, E;
2302 call(C, relocInfo::none);
2303 jmp(E);
2304
2305 bind(C);
2306 call_VM_helper(oop_result, entry_point, 0, check_exceptions);
2307 ret(0);
2308
2309 bind(E);
2310 }
2311
2312 void MacroAssembler::call_VM(Register oop_result,
2313 address entry_point,
2314 Register arg_1,
2315 bool check_exceptions) {
2316 Label C, E;
2317 call(C, relocInfo::none);
2318 jmp(E);
2319
2320 bind(C);
2321 pass_arg1(this, arg_1);
2322 call_VM_helper(oop_result, entry_point, 1, check_exceptions);
2323 ret(0);
2324
2325 bind(E);
2326 }
2327
2328 void MacroAssembler::call_VM(Register oop_result,
2329 address entry_point,
2330 Register arg_1,
2331 Register arg_2,
2332 bool check_exceptions) {
2333 Label C, E;
2334 call(C, relocInfo::none);
2335 jmp(E);
2336
2337 bind(C);
2338
2339 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg"));
2340
2341 pass_arg2(this, arg_2);
2342 pass_arg1(this, arg_1);
2343 call_VM_helper(oop_result, entry_point, 2, check_exceptions);
2344 ret(0);
2345
2346 bind(E);
2347 }
2348
2349 void MacroAssembler::call_VM(Register oop_result,
2350 address entry_point,
2351 Register arg_1,
2352 Register arg_2,
2353 Register arg_3,
2354 bool check_exceptions) {
2355 Label C, E;
2356 call(C, relocInfo::none);
2357 jmp(E);
2358
2359 bind(C);
2360
2361 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg"));
2362 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg"));
2363 pass_arg3(this, arg_3);
2364
2365 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg"));
2366 pass_arg2(this, arg_2);
2367
2368 pass_arg1(this, arg_1);
2369 call_VM_helper(oop_result, entry_point, 3, check_exceptions);
2370 ret(0);
2371
2372 bind(E);
2373 }
2374
2375 void MacroAssembler::call_VM(Register oop_result,
2376 Register last_java_sp,
2377 address entry_point,
2378 int number_of_arguments,
2379 bool check_exceptions) {
2380 Register thread = LP64_ONLY(r15_thread) NOT_LP64(noreg);
2381 call_VM_base(oop_result, thread, last_java_sp, entry_point, number_of_arguments, check_exceptions);
2382 }
2383
2384 void MacroAssembler::call_VM(Register oop_result,
2385 Register last_java_sp,
2386 address entry_point,
2387 Register arg_1,
2388 bool check_exceptions) {
2389 pass_arg1(this, arg_1);
2390 call_VM(oop_result, last_java_sp, entry_point, 1, check_exceptions);
2391 }
2392
2393 void MacroAssembler::call_VM(Register oop_result,
2394 Register last_java_sp,
2395 address entry_point,
2396 Register arg_1,
2397 Register arg_2,
2398 bool check_exceptions) {
2399
2400 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg"));
2401 pass_arg2(this, arg_2);
2402 pass_arg1(this, arg_1);
2403 call_VM(oop_result, last_java_sp, entry_point, 2, check_exceptions);
2404 }
2405
2406 void MacroAssembler::call_VM(Register oop_result,
2407 Register last_java_sp,
2408 address entry_point,
2409 Register arg_1,
2410 Register arg_2,
2411 Register arg_3,
2412 bool check_exceptions) {
2413 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg"));
2414 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg"));
2415 pass_arg3(this, arg_3);
2416 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg"));
2417 pass_arg2(this, arg_2);
2418 pass_arg1(this, arg_1);
2419 call_VM(oop_result, last_java_sp, entry_point, 3, check_exceptions);
2420 }
2421
2422 void MacroAssembler::super_call_VM(Register oop_result,
2423 Register last_java_sp,
2424 address entry_point,
2425 int number_of_arguments,
2426 bool check_exceptions) {
2427 Register thread = LP64_ONLY(r15_thread) NOT_LP64(noreg);
2428 MacroAssembler::call_VM_base(oop_result, thread, last_java_sp, entry_point, number_of_arguments, check_exceptions);
2429 }
2430
2431 void MacroAssembler::super_call_VM(Register oop_result,
2432 Register last_java_sp,
2433 address entry_point,
2434 Register arg_1,
2435 bool check_exceptions) {
2436 pass_arg1(this, arg_1);
2437 super_call_VM(oop_result, last_java_sp, entry_point, 1, check_exceptions);
2438 }
2439
2440 void MacroAssembler::super_call_VM(Register oop_result,
2441 Register last_java_sp,
2442 address entry_point,
2443 Register arg_1,
2444 Register arg_2,
2445 bool check_exceptions) {
2446
2447 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg"));
2448 pass_arg2(this, arg_2);
2449 pass_arg1(this, arg_1);
2450 super_call_VM(oop_result, last_java_sp, entry_point, 2, check_exceptions);
2451 }
2452
2453 void MacroAssembler::super_call_VM(Register oop_result,
2454 Register last_java_sp,
2455 address entry_point,
2456 Register arg_1,
2457 Register arg_2,
2458 Register arg_3,
2459 bool check_exceptions) {
2460 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg"));
2461 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg"));
2462 pass_arg3(this, arg_3);
2463 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg"));
2464 pass_arg2(this, arg_2);
2465 pass_arg1(this, arg_1);
2466 super_call_VM(oop_result, last_java_sp, entry_point, 3, check_exceptions);
2467 }
2468
2469 void MacroAssembler::call_VM_base(Register oop_result,
2470 Register java_thread,
2471 Register last_java_sp,
2472 address entry_point,
2473 int number_of_arguments,
2474 bool check_exceptions) {
2475 // determine java_thread register
2476 if (!java_thread->is_valid()) {
2477 #ifdef _LP64
2478 java_thread = r15_thread;
2479 #else
2480 java_thread = rdi;
2481 get_thread(java_thread);
2482 #endif // LP64
2483 }
2484 // determine last_java_sp register
2485 if (!last_java_sp->is_valid()) {
2486 last_java_sp = rsp;
2487 }
2488 // debugging support
2489 assert(number_of_arguments >= 0 , "cannot have negative number of arguments");
2490 LP64_ONLY(assert(java_thread == r15_thread, "unexpected register"));
2491 #ifdef ASSERT
2492 // TraceBytecodes does not use r12 but saves it over the call, so don't verify
2493 // r12 is the heapbase.
2494 LP64_ONLY(if ((UseCompressedOops || UseCompressedClassPointers) && !TraceBytecodes) verify_heapbase("call_VM_base: heap base corrupted?");)
2495 #endif // ASSERT
2496
2497 assert(java_thread != oop_result , "cannot use the same register for java_thread & oop_result");
2498 assert(java_thread != last_java_sp, "cannot use the same register for java_thread & last_java_sp");
2499
2500 // push java thread (becomes first argument of C function)
2501
2502 NOT_LP64(push(java_thread); number_of_arguments++);
2503 LP64_ONLY(mov(c_rarg0, r15_thread));
2504
2505 // set last Java frame before call
2506 assert(last_java_sp != rbp, "can't use ebp/rbp");
2507
2508 // Only interpreter should have to set fp
2509 set_last_Java_frame(java_thread, last_java_sp, rbp, NULL);
2510
2511 // do the call, remove parameters
2512 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
2513
2514 // restore the thread (cannot use the pushed argument since arguments
2515 // may be overwritten by C code generated by an optimizing compiler);
2516 // however can use the register value directly if it is callee saved.
2517 if (LP64_ONLY(true ||) java_thread == rdi || java_thread == rsi) {
2518 // rdi & rsi (also r15) are callee saved -> nothing to do
2519 #ifdef ASSERT
2520 guarantee(java_thread != rax, "change this code");
2521 push(rax);
2522 { Label L;
2523 get_thread(rax);
2524 cmpptr(java_thread, rax);
2525 jcc(Assembler::equal, L);
2526 STOP("MacroAssembler::call_VM_base: rdi not callee saved?");
2527 bind(L);
2528 }
2529 pop(rax);
2530 #endif
2531 } else {
2532 get_thread(java_thread);
2533 }
2534 // reset last Java frame
2535 // Only interpreter should have to clear fp
2536 reset_last_Java_frame(java_thread, true);
2537
2538 // C++ interp handles this in the interpreter
2539 check_and_handle_popframe(java_thread);
2540 check_and_handle_earlyret(java_thread);
2541
2542 if (check_exceptions) {
2543 // check for pending exceptions (java_thread is set upon return)
2544 cmpptr(Address(java_thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
2545 #ifndef _LP64
2546 jump_cc(Assembler::notEqual,
2547 RuntimeAddress(StubRoutines::forward_exception_entry()));
2548 #else
2549 // This used to conditionally jump to forward_exception however it is
2550 // possible if we relocate that the branch will not reach. So we must jump
2551 // around so we can always reach
2552
2553 Label ok;
2554 jcc(Assembler::equal, ok);
2555 jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
2556 bind(ok);
2557 #endif // LP64
2558 }
2559
2560 // get oop result if there is one and reset the value in the thread
2561 if (oop_result->is_valid()) {
2562 get_vm_result(oop_result, java_thread);
2563 }
2564 }
2565
2566 void MacroAssembler::call_VM_helper(Register oop_result, address entry_point, int number_of_arguments, bool check_exceptions) {
2567
2568 // Calculate the value for last_Java_sp
2569 // somewhat subtle. call_VM does an intermediate call
2570 // which places a return address on the stack just under the
2571 // stack pointer as the user finsihed with it. This allows
2572 // use to retrieve last_Java_pc from last_Java_sp[-1].
2573 // On 32bit we then have to push additional args on the stack to accomplish
2574 // the actual requested call. On 64bit call_VM only can use register args
2575 // so the only extra space is the return address that call_VM created.
2576 // This hopefully explains the calculations here.
2577
2578 #ifdef _LP64
2579 // We've pushed one address, correct last_Java_sp
2580 lea(rax, Address(rsp, wordSize));
2581 #else
2582 lea(rax, Address(rsp, (1 + number_of_arguments) * wordSize));
2583 #endif // LP64
2584
2585 call_VM_base(oop_result, noreg, rax, entry_point, number_of_arguments, check_exceptions);
2586
2587 }
2588
2589 // Use this method when MacroAssembler version of call_VM_leaf_base() should be called from Interpreter.
2590 void MacroAssembler::call_VM_leaf0(address entry_point) {
2591 MacroAssembler::call_VM_leaf_base(entry_point, 0);
2592 }
2593
2594 void MacroAssembler::call_VM_leaf(address entry_point, int number_of_arguments) {
2595 call_VM_leaf_base(entry_point, number_of_arguments);
2596 }
2597
2598 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0) {
2599 pass_arg0(this, arg_0);
2600 call_VM_leaf(entry_point, 1);
2601 }
2602
2603 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0, Register arg_1) {
2604
2605 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg"));
2606 pass_arg1(this, arg_1);
2607 pass_arg0(this, arg_0);
2608 call_VM_leaf(entry_point, 2);
2609 }
2610
2611 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2) {
2612 LP64_ONLY(assert(arg_0 != c_rarg2, "smashed arg"));
2613 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg"));
2614 pass_arg2(this, arg_2);
2615 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg"));
2616 pass_arg1(this, arg_1);
2617 pass_arg0(this, arg_0);
2618 call_VM_leaf(entry_point, 3);
2619 }
2620
2621 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0) {
2622 pass_arg0(this, arg_0);
2623 MacroAssembler::call_VM_leaf_base(entry_point, 1);
2624 }
2625
2626 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1) {
2627
2628 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg"));
2629 pass_arg1(this, arg_1);
2630 pass_arg0(this, arg_0);
2631 MacroAssembler::call_VM_leaf_base(entry_point, 2);
2632 }
2633
2634 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2) {
2635 LP64_ONLY(assert(arg_0 != c_rarg2, "smashed arg"));
2636 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg"));
2637 pass_arg2(this, arg_2);
2638 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg"));
2639 pass_arg1(this, arg_1);
2640 pass_arg0(this, arg_0);
2641 MacroAssembler::call_VM_leaf_base(entry_point, 3);
2642 }
2643
2644 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2, Register arg_3) {
2645 LP64_ONLY(assert(arg_0 != c_rarg3, "smashed arg"));
2646 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg"));
2647 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg"));
2648 pass_arg3(this, arg_3);
2649 LP64_ONLY(assert(arg_0 != c_rarg2, "smashed arg"));
2650 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg"));
2651 pass_arg2(this, arg_2);
2652 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg"));
2653 pass_arg1(this, arg_1);
2654 pass_arg0(this, arg_0);
2655 MacroAssembler::call_VM_leaf_base(entry_point, 4);
2656 }
2657
2658 void MacroAssembler::get_vm_result(Register oop_result, Register java_thread) {
2659 movptr(oop_result, Address(java_thread, JavaThread::vm_result_offset()));
2660 movptr(Address(java_thread, JavaThread::vm_result_offset()), NULL_WORD);
2661 verify_oop(oop_result, "broken oop in call_VM_base");
2662 }
2663
2664 void MacroAssembler::get_vm_result_2(Register metadata_result, Register java_thread) {
2665 movptr(metadata_result, Address(java_thread, JavaThread::vm_result_2_offset()));
2666 movptr(Address(java_thread, JavaThread::vm_result_2_offset()), NULL_WORD);
2667 }
2668
2669 void MacroAssembler::check_and_handle_earlyret(Register java_thread) {
2670 }
2671
2672 void MacroAssembler::check_and_handle_popframe(Register java_thread) {
2673 }
2674
2675 void MacroAssembler::cmp32(AddressLiteral src1, int32_t imm) {
2676 if (reachable(src1)) {
2677 cmpl(as_Address(src1), imm);
2678 } else {
2679 lea(rscratch1, src1);
2680 cmpl(Address(rscratch1, 0), imm);
2681 }
2682 }
2683
2684 void MacroAssembler::cmp32(Register src1, AddressLiteral src2) {
2685 assert(!src2.is_lval(), "use cmpptr");
2686 if (reachable(src2)) {
2687 cmpl(src1, as_Address(src2));
2688 } else {
2689 lea(rscratch1, src2);
2690 cmpl(src1, Address(rscratch1, 0));
2691 }
2692 }
2693
2694 void MacroAssembler::cmp32(Register src1, int32_t imm) {
2695 Assembler::cmpl(src1, imm);
2696 }
2697
2698 void MacroAssembler::cmp32(Register src1, Address src2) {
2699 Assembler::cmpl(src1, src2);
2700 }
2701
2702 void MacroAssembler::cmpsd2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less) {
2703 ucomisd(opr1, opr2);
2704
2705 Label L;
2706 if (unordered_is_less) {
2707 movl(dst, -1);
2708 jcc(Assembler::parity, L);
2709 jcc(Assembler::below , L);
2710 movl(dst, 0);
2711 jcc(Assembler::equal , L);
2712 increment(dst);
2713 } else { // unordered is greater
2714 movl(dst, 1);
2715 jcc(Assembler::parity, L);
2716 jcc(Assembler::above , L);
2717 movl(dst, 0);
2718 jcc(Assembler::equal , L);
2719 decrementl(dst);
2720 }
2721 bind(L);
2722 }
2723
2724 void MacroAssembler::cmpss2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less) {
2725 ucomiss(opr1, opr2);
2726
2727 Label L;
2728 if (unordered_is_less) {
2729 movl(dst, -1);
2730 jcc(Assembler::parity, L);
2731 jcc(Assembler::below , L);
2732 movl(dst, 0);
2733 jcc(Assembler::equal , L);
2734 increment(dst);
2735 } else { // unordered is greater
2736 movl(dst, 1);
2737 jcc(Assembler::parity, L);
2738 jcc(Assembler::above , L);
2739 movl(dst, 0);
2740 jcc(Assembler::equal , L);
2741 decrementl(dst);
2742 }
2743 bind(L);
2744 }
2745
2746
2747 void MacroAssembler::cmp8(AddressLiteral src1, int imm) {
2748 if (reachable(src1)) {
2749 cmpb(as_Address(src1), imm);
2750 } else {
2751 lea(rscratch1, src1);
2752 cmpb(Address(rscratch1, 0), imm);
2753 }
2754 }
2755
2756 void MacroAssembler::cmpptr(Register src1, AddressLiteral src2) {
2757 #ifdef _LP64
2758 if (src2.is_lval()) {
2759 movptr(rscratch1, src2);
2760 Assembler::cmpq(src1, rscratch1);
2761 } else if (reachable(src2)) {
2762 cmpq(src1, as_Address(src2));
2763 } else {
2764 lea(rscratch1, src2);
2765 Assembler::cmpq(src1, Address(rscratch1, 0));
2766 }
2767 #else
2768 if (src2.is_lval()) {
2769 cmp_literal32(src1, (int32_t) src2.target(), src2.rspec());
2770 } else {
2771 cmpl(src1, as_Address(src2));
2772 }
2773 #endif // _LP64
2774 }
2775
2776 void MacroAssembler::cmpptr(Address src1, AddressLiteral src2) {
2777 assert(src2.is_lval(), "not a mem-mem compare");
2778 #ifdef _LP64
2779 // moves src2's literal address
2780 movptr(rscratch1, src2);
2781 Assembler::cmpq(src1, rscratch1);
2782 #else
2783 cmp_literal32(src1, (int32_t) src2.target(), src2.rspec());
2784 #endif // _LP64
2785 }
2786
2787 void MacroAssembler::cmpoop(Register src1, Register src2) {
2788 cmpptr(src1, src2);
2789 }
2790
2791 void MacroAssembler::cmpoop(Register src1, Address src2) {
2792 cmpptr(src1, src2);
2793 }
2794
2795 #ifdef _LP64
2796 void MacroAssembler::cmpoop(Register src1, jobject src2) {
2797 movoop(rscratch1, src2);
2798 cmpptr(src1, rscratch1);
2799 }
2800 #endif
2801
2802 void MacroAssembler::locked_cmpxchgptr(Register reg, AddressLiteral adr) {
2803 if (reachable(adr)) {
2804 if (os::is_MP())
2805 lock();
2806 cmpxchgptr(reg, as_Address(adr));
2807 } else {
2808 lea(rscratch1, adr);
2809 if (os::is_MP())
2810 lock();
2811 cmpxchgptr(reg, Address(rscratch1, 0));
2812 }
2813 }
2814
2815 void MacroAssembler::cmpxchgptr(Register reg, Address adr) {
2816 LP64_ONLY(cmpxchgq(reg, adr)) NOT_LP64(cmpxchgl(reg, adr));
2817 }
2818
2819 void MacroAssembler::comisd(XMMRegister dst, AddressLiteral src) {
2820 if (reachable(src)) {
2821 Assembler::comisd(dst, as_Address(src));
2822 } else {
2823 lea(rscratch1, src);
2824 Assembler::comisd(dst, Address(rscratch1, 0));
2825 }
2826 }
2827
2828 void MacroAssembler::comiss(XMMRegister dst, AddressLiteral src) {
2829 if (reachable(src)) {
2830 Assembler::comiss(dst, as_Address(src));
2831 } else {
2832 lea(rscratch1, src);
2833 Assembler::comiss(dst, Address(rscratch1, 0));
2834 }
2835 }
2836
2837
2838 void MacroAssembler::cond_inc32(Condition cond, AddressLiteral counter_addr) {
2839 Condition negated_cond = negate_condition(cond);
2840 Label L;
2841 jcc(negated_cond, L);
2842 pushf(); // Preserve flags
2843 atomic_incl(counter_addr);
2844 popf();
2845 bind(L);
2846 }
2847
2848 int MacroAssembler::corrected_idivl(Register reg) {
2849 // Full implementation of Java idiv and irem; checks for
2850 // special case as described in JVM spec., p.243 & p.271.
2851 // The function returns the (pc) offset of the idivl
2852 // instruction - may be needed for implicit exceptions.
2853 //
2854 // normal case special case
2855 //
2856 // input : rax,: dividend min_int
2857 // reg: divisor (may not be rax,/rdx) -1
2858 //
2859 // output: rax,: quotient (= rax, idiv reg) min_int
2860 // rdx: remainder (= rax, irem reg) 0
2861 assert(reg != rax && reg != rdx, "reg cannot be rax, or rdx register");
2862 const int min_int = 0x80000000;
2863 Label normal_case, special_case;
2864
2865 // check for special case
2866 cmpl(rax, min_int);
2867 jcc(Assembler::notEqual, normal_case);
2868 xorl(rdx, rdx); // prepare rdx for possible special case (where remainder = 0)
2869 cmpl(reg, -1);
2870 jcc(Assembler::equal, special_case);
2871
2872 // handle normal case
2873 bind(normal_case);
2874 cdql();
2875 int idivl_offset = offset();
2876 idivl(reg);
2877
2878 // normal and special case exit
2879 bind(special_case);
2880
2881 return idivl_offset;
2882 }
2883
2884
2885
2886 void MacroAssembler::decrementl(Register reg, int value) {
2887 if (value == min_jint) {subl(reg, value) ; return; }
2888 if (value < 0) { incrementl(reg, -value); return; }
2889 if (value == 0) { ; return; }
2890 if (value == 1 && UseIncDec) { decl(reg) ; return; }
2891 /* else */ { subl(reg, value) ; return; }
2892 }
2893
2894 void MacroAssembler::decrementl(Address dst, int value) {
2895 if (value == min_jint) {subl(dst, value) ; return; }
2896 if (value < 0) { incrementl(dst, -value); return; }
2897 if (value == 0) { ; return; }
2898 if (value == 1 && UseIncDec) { decl(dst) ; return; }
2899 /* else */ { subl(dst, value) ; return; }
2900 }
2901
2902 void MacroAssembler::division_with_shift (Register reg, int shift_value) {
2903 assert (shift_value > 0, "illegal shift value");
2904 Label _is_positive;
2905 testl (reg, reg);
2906 jcc (Assembler::positive, _is_positive);
2907 int offset = (1 << shift_value) - 1 ;
2908
2909 if (offset == 1) {
2910 incrementl(reg);
2911 } else {
2912 addl(reg, offset);
2913 }
2914
2915 bind (_is_positive);
2916 sarl(reg, shift_value);
2917 }
2918
2919 void MacroAssembler::divsd(XMMRegister dst, AddressLiteral src) {
2920 if (reachable(src)) {
2921 Assembler::divsd(dst, as_Address(src));
2922 } else {
2923 lea(rscratch1, src);
2924 Assembler::divsd(dst, Address(rscratch1, 0));
2925 }
2926 }
2927
2928 void MacroAssembler::divss(XMMRegister dst, AddressLiteral src) {
2929 if (reachable(src)) {
2930 Assembler::divss(dst, as_Address(src));
2931 } else {
2932 lea(rscratch1, src);
2933 Assembler::divss(dst, Address(rscratch1, 0));
2934 }
2935 }
2936
2937 // !defined(COMPILER2) is because of stupid core builds
2938 #if !defined(_LP64) || defined(COMPILER1) || !defined(COMPILER2) || INCLUDE_JVMCI
2939 void MacroAssembler::empty_FPU_stack() {
2940 if (VM_Version::supports_mmx()) {
2941 emms();
2942 } else {
2943 for (int i = 8; i-- > 0; ) ffree(i);
2944 }
2945 }
2946 #endif // !LP64 || C1 || !C2 || INCLUDE_JVMCI
2947
2948
2949 // Defines obj, preserves var_size_in_bytes
2950 void MacroAssembler::eden_allocate(Register obj,
2951 Register var_size_in_bytes,
2952 int con_size_in_bytes,
2953 Register t1,
2954 Label& slow_case) {
2955 assert(obj == rax, "obj must be in rax, for cmpxchg");
2956 assert_different_registers(obj, var_size_in_bytes, t1);
2957 if (!Universe::heap()->supports_inline_contig_alloc()) {
2958 jmp(slow_case);
2959 } else {
2960 Register end = t1;
2961 Label retry;
2962 bind(retry);
2963 ExternalAddress heap_top((address) Universe::heap()->top_addr());
2964 movptr(obj, heap_top);
2965 if (var_size_in_bytes == noreg) {
2966 lea(end, Address(obj, con_size_in_bytes));
2967 } else {
2968 lea(end, Address(obj, var_size_in_bytes, Address::times_1));
2969 }
2970 // if end < obj then we wrapped around => object too long => slow case
2971 cmpptr(end, obj);
2972 jcc(Assembler::below, slow_case);
2973 cmpptr(end, ExternalAddress((address) Universe::heap()->end_addr()));
2974 jcc(Assembler::above, slow_case);
2975 // Compare obj with the top addr, and if still equal, store the new top addr in
2976 // end at the address of the top addr pointer. Sets ZF if was equal, and clears
2977 // it otherwise. Use lock prefix for atomicity on MPs.
2978 locked_cmpxchgptr(end, heap_top);
2979 jcc(Assembler::notEqual, retry);
2980 }
2981 }
2982
2983 void MacroAssembler::enter() {
2984 push(rbp);
2985 mov(rbp, rsp);
2986 }
2987
2988 // A 5 byte nop that is safe for patching (see patch_verified_entry)
2989 void MacroAssembler::fat_nop() {
2990 if (UseAddressNop) {
2991 addr_nop_5();
2992 } else {
2993 emit_int8(0x26); // es:
2994 emit_int8(0x2e); // cs:
2995 emit_int8(0x64); // fs:
2996 emit_int8(0x65); // gs:
2997 emit_int8((unsigned char)0x90);
2998 }
2999 }
3000
3001 void MacroAssembler::fcmp(Register tmp) {
3002 fcmp(tmp, 1, true, true);
3003 }
3004
3005 void MacroAssembler::fcmp(Register tmp, int index, bool pop_left, bool pop_right) {
3006 assert(!pop_right || pop_left, "usage error");
3007 if (VM_Version::supports_cmov()) {
3008 assert(tmp == noreg, "unneeded temp");
3009 if (pop_left) {
3010 fucomip(index);
3011 } else {
3012 fucomi(index);
3013 }
3014 if (pop_right) {
3015 fpop();
3016 }
3017 } else {
3018 assert(tmp != noreg, "need temp");
3019 if (pop_left) {
3020 if (pop_right) {
3021 fcompp();
3022 } else {
3023 fcomp(index);
3024 }
3025 } else {
3026 fcom(index);
3027 }
3028 // convert FPU condition into eflags condition via rax,
3029 save_rax(tmp);
3030 fwait(); fnstsw_ax();
3031 sahf();
3032 restore_rax(tmp);
3033 }
3034 // condition codes set as follows:
3035 //
3036 // CF (corresponds to C0) if x < y
3037 // PF (corresponds to C2) if unordered
3038 // ZF (corresponds to C3) if x = y
3039 }
3040
3041 void MacroAssembler::fcmp2int(Register dst, bool unordered_is_less) {
3042 fcmp2int(dst, unordered_is_less, 1, true, true);
3043 }
3044
3045 void MacroAssembler::fcmp2int(Register dst, bool unordered_is_less, int index, bool pop_left, bool pop_right) {
3046 fcmp(VM_Version::supports_cmov() ? noreg : dst, index, pop_left, pop_right);
3047 Label L;
3048 if (unordered_is_less) {
3049 movl(dst, -1);
3050 jcc(Assembler::parity, L);
3051 jcc(Assembler::below , L);
3052 movl(dst, 0);
3053 jcc(Assembler::equal , L);
3054 increment(dst);
3055 } else { // unordered is greater
3056 movl(dst, 1);
3057 jcc(Assembler::parity, L);
3058 jcc(Assembler::above , L);
3059 movl(dst, 0);
3060 jcc(Assembler::equal , L);
3061 decrementl(dst);
3062 }
3063 bind(L);
3064 }
3065
3066 void MacroAssembler::fld_d(AddressLiteral src) {
3067 fld_d(as_Address(src));
3068 }
3069
3070 void MacroAssembler::fld_s(AddressLiteral src) {
3071 fld_s(as_Address(src));
3072 }
3073
3074 void MacroAssembler::fld_x(AddressLiteral src) {
3075 Assembler::fld_x(as_Address(src));
3076 }
3077
3078 void MacroAssembler::fldcw(AddressLiteral src) {
3079 Assembler::fldcw(as_Address(src));
3080 }
3081
3082 void MacroAssembler::mulpd(XMMRegister dst, AddressLiteral src) {
3083 if (reachable(src)) {
3084 Assembler::mulpd(dst, as_Address(src));
3085 } else {
3086 lea(rscratch1, src);
3087 Assembler::mulpd(dst, Address(rscratch1, 0));
3088 }
3089 }
3090
3091 void MacroAssembler::increase_precision() {
3092 subptr(rsp, BytesPerWord);
3093 fnstcw(Address(rsp, 0));
3094 movl(rax, Address(rsp, 0));
3095 orl(rax, 0x300);
3096 push(rax);
3097 fldcw(Address(rsp, 0));
3098 pop(rax);
3099 }
3100
3101 void MacroAssembler::restore_precision() {
3102 fldcw(Address(rsp, 0));
3103 addptr(rsp, BytesPerWord);
3104 }
3105
3106 void MacroAssembler::fpop() {
3107 ffree();
3108 fincstp();
3109 }
3110
3111 void MacroAssembler::load_float(Address src) {
3112 if (UseSSE >= 1) {
3113 movflt(xmm0, src);
3114 } else {
3115 LP64_ONLY(ShouldNotReachHere());
3116 NOT_LP64(fld_s(src));
3117 }
3118 }
3119
3120 void MacroAssembler::store_float(Address dst) {
3121 if (UseSSE >= 1) {
3122 movflt(dst, xmm0);
3123 } else {
3124 LP64_ONLY(ShouldNotReachHere());
3125 NOT_LP64(fstp_s(dst));
3126 }
3127 }
3128
3129 void MacroAssembler::load_double(Address src) {
3130 if (UseSSE >= 2) {
3131 movdbl(xmm0, src);
3132 } else {
3133 LP64_ONLY(ShouldNotReachHere());
3134 NOT_LP64(fld_d(src));
3135 }
3136 }
3137
3138 void MacroAssembler::store_double(Address dst) {
3139 if (UseSSE >= 2) {
3140 movdbl(dst, xmm0);
3141 } else {
3142 LP64_ONLY(ShouldNotReachHere());
3143 NOT_LP64(fstp_d(dst));
3144 }
3145 }
3146
3147 void MacroAssembler::fremr(Register tmp) {
3148 save_rax(tmp);
3149 { Label L;
3150 bind(L);
3151 fprem();
3152 fwait(); fnstsw_ax();
3153 #ifdef _LP64
3154 testl(rax, 0x400);
3155 jcc(Assembler::notEqual, L);
3156 #else
3157 sahf();
3158 jcc(Assembler::parity, L);
3159 #endif // _LP64
3160 }
3161 restore_rax(tmp);
3162 // Result is in ST0.
3163 // Note: fxch & fpop to get rid of ST1
3164 // (otherwise FPU stack could overflow eventually)
3165 fxch(1);
3166 fpop();
3167 }
3168
3169 // dst = c = a * b + c
3170 void MacroAssembler::fmad(XMMRegister dst, XMMRegister a, XMMRegister b, XMMRegister c) {
3171 Assembler::vfmadd231sd(c, a, b);
3172 if (dst != c) {
3173 movdbl(dst, c);
3174 }
3175 }
3176
3177 // dst = c = a * b + c
3178 void MacroAssembler::fmaf(XMMRegister dst, XMMRegister a, XMMRegister b, XMMRegister c) {
3179 Assembler::vfmadd231ss(c, a, b);
3180 if (dst != c) {
3181 movflt(dst, c);
3182 }
3183 }
3184
3185 // dst = c = a * b + c
3186 void MacroAssembler::vfmad(XMMRegister dst, XMMRegister a, XMMRegister b, XMMRegister c, int vector_len) {
3187 Assembler::vfmadd231pd(c, a, b, vector_len);
3188 if (dst != c) {
3189 vmovdqu(dst, c);
3190 }
3191 }
3192
3193 // dst = c = a * b + c
3194 void MacroAssembler::vfmaf(XMMRegister dst, XMMRegister a, XMMRegister b, XMMRegister c, int vector_len) {
3195 Assembler::vfmadd231ps(c, a, b, vector_len);
3196 if (dst != c) {
3197 vmovdqu(dst, c);
3198 }
3199 }
3200
3201 // dst = c = a * b + c
3202 void MacroAssembler::vfmad(XMMRegister dst, XMMRegister a, Address b, XMMRegister c, int vector_len) {
3203 Assembler::vfmadd231pd(c, a, b, vector_len);
3204 if (dst != c) {
3205 vmovdqu(dst, c);
3206 }
3207 }
3208
3209 // dst = c = a * b + c
3210 void MacroAssembler::vfmaf(XMMRegister dst, XMMRegister a, Address b, XMMRegister c, int vector_len) {
3211 Assembler::vfmadd231ps(c, a, b, vector_len);
3212 if (dst != c) {
3213 vmovdqu(dst, c);
3214 }
3215 }
3216
3217 void MacroAssembler::incrementl(AddressLiteral dst) {
3218 if (reachable(dst)) {
3219 incrementl(as_Address(dst));
3220 } else {
3221 lea(rscratch1, dst);
3222 incrementl(Address(rscratch1, 0));
3223 }
3224 }
3225
3226 void MacroAssembler::incrementl(ArrayAddress dst) {
3227 incrementl(as_Address(dst));
3228 }
3229
3230 void MacroAssembler::incrementl(Register reg, int value) {
3231 if (value == min_jint) {addl(reg, value) ; return; }
3232 if (value < 0) { decrementl(reg, -value); return; }
3233 if (value == 0) { ; return; }
3234 if (value == 1 && UseIncDec) { incl(reg) ; return; }
3235 /* else */ { addl(reg, value) ; return; }
3236 }
3237
3238 void MacroAssembler::incrementl(Address dst, int value) {
3239 if (value == min_jint) {addl(dst, value) ; return; }
3240 if (value < 0) { decrementl(dst, -value); return; }
3241 if (value == 0) { ; return; }
3242 if (value == 1 && UseIncDec) { incl(dst) ; return; }
3243 /* else */ { addl(dst, value) ; return; }
3244 }
3245
3246 void MacroAssembler::jump(AddressLiteral dst) {
3247 if (reachable(dst)) {
3248 jmp_literal(dst.target(), dst.rspec());
3249 } else {
3250 lea(rscratch1, dst);
3251 jmp(rscratch1);
3252 }
3253 }
3254
3255 void MacroAssembler::jump_cc(Condition cc, AddressLiteral dst) {
3256 if (reachable(dst)) {
3257 InstructionMark im(this);
3258 relocate(dst.reloc());
3259 const int short_size = 2;
3260 const int long_size = 6;
3261 int offs = (intptr_t)dst.target() - ((intptr_t)pc());
3262 if (dst.reloc() == relocInfo::none && is8bit(offs - short_size)) {
3263 // 0111 tttn #8-bit disp
3264 emit_int8(0x70 | cc);
3265 emit_int8((offs - short_size) & 0xFF);
3266 } else {
3267 // 0000 1111 1000 tttn #32-bit disp
3268 emit_int8(0x0F);
3269 emit_int8((unsigned char)(0x80 | cc));
3270 emit_int32(offs - long_size);
3271 }
3272 } else {
3273 #ifdef ASSERT
3274 warning("reversing conditional branch");
3275 #endif /* ASSERT */
3276 Label skip;
3277 jccb(reverse[cc], skip);
3278 lea(rscratch1, dst);
3279 Assembler::jmp(rscratch1);
3280 bind(skip);
3281 }
3282 }
3283
3284 void MacroAssembler::ldmxcsr(AddressLiteral src) {
3285 if (reachable(src)) {
3286 Assembler::ldmxcsr(as_Address(src));
3287 } else {
3288 lea(rscratch1, src);
3289 Assembler::ldmxcsr(Address(rscratch1, 0));
3290 }
3291 }
3292
3293 int MacroAssembler::load_signed_byte(Register dst, Address src) {
3294 int off;
3295 if (LP64_ONLY(true ||) VM_Version::is_P6()) {
3296 off = offset();
3297 movsbl(dst, src); // movsxb
3298 } else {
3299 off = load_unsigned_byte(dst, src);
3300 shll(dst, 24);
3301 sarl(dst, 24);
3302 }
3303 return off;
3304 }
3305
3306 // Note: load_signed_short used to be called load_signed_word.
3307 // Although the 'w' in x86 opcodes refers to the term "word" in the assembler
3308 // manual, which means 16 bits, that usage is found nowhere in HotSpot code.
3309 // The term "word" in HotSpot means a 32- or 64-bit machine word.
3310 int MacroAssembler::load_signed_short(Register dst, Address src) {
3311 int off;
3312 if (LP64_ONLY(true ||) VM_Version::is_P6()) {
3313 // This is dubious to me since it seems safe to do a signed 16 => 64 bit
3314 // version but this is what 64bit has always done. This seems to imply
3315 // that users are only using 32bits worth.
3316 off = offset();
3317 movswl(dst, src); // movsxw
3318 } else {
3319 off = load_unsigned_short(dst, src);
3320 shll(dst, 16);
3321 sarl(dst, 16);
3322 }
3323 return off;
3324 }
3325
3326 int MacroAssembler::load_unsigned_byte(Register dst, Address src) {
3327 // According to Intel Doc. AP-526, "Zero-Extension of Short", p.16,
3328 // and "3.9 Partial Register Penalties", p. 22).
3329 int off;
3330 if (LP64_ONLY(true || ) VM_Version::is_P6() || src.uses(dst)) {
3331 off = offset();
3332 movzbl(dst, src); // movzxb
3333 } else {
3334 xorl(dst, dst);
3335 off = offset();
3336 movb(dst, src);
3337 }
3338 return off;
3339 }
3340
3341 // Note: load_unsigned_short used to be called load_unsigned_word.
3342 int MacroAssembler::load_unsigned_short(Register dst, Address src) {
3343 // According to Intel Doc. AP-526, "Zero-Extension of Short", p.16,
3344 // and "3.9 Partial Register Penalties", p. 22).
3345 int off;
3346 if (LP64_ONLY(true ||) VM_Version::is_P6() || src.uses(dst)) {
3347 off = offset();
3348 movzwl(dst, src); // movzxw
3349 } else {
3350 xorl(dst, dst);
3351 off = offset();
3352 movw(dst, src);
3353 }
3354 return off;
3355 }
3356
3357 void MacroAssembler::load_sized_value(Register dst, Address src, size_t size_in_bytes, bool is_signed, Register dst2) {
3358 switch (size_in_bytes) {
3359 #ifndef _LP64
3360 case 8:
3361 assert(dst2 != noreg, "second dest register required");
3362 movl(dst, src);
3363 movl(dst2, src.plus_disp(BytesPerInt));
3364 break;
3365 #else
3366 case 8: movq(dst, src); break;
3367 #endif
3368 case 4: movl(dst, src); break;
3369 case 2: is_signed ? load_signed_short(dst, src) : load_unsigned_short(dst, src); break;
3370 case 1: is_signed ? load_signed_byte( dst, src) : load_unsigned_byte( dst, src); break;
3371 default: ShouldNotReachHere();
3372 }
3373 }
3374
3375 void MacroAssembler::store_sized_value(Address dst, Register src, size_t size_in_bytes, Register src2) {
3376 switch (size_in_bytes) {
3377 #ifndef _LP64
3378 case 8:
3379 assert(src2 != noreg, "second source register required");
3380 movl(dst, src);
3381 movl(dst.plus_disp(BytesPerInt), src2);
3382 break;
3383 #else
3384 case 8: movq(dst, src); break;
3385 #endif
3386 case 4: movl(dst, src); break;
3387 case 2: movw(dst, src); break;
3388 case 1: movb(dst, src); break;
3389 default: ShouldNotReachHere();
3390 }
3391 }
3392
3393 void MacroAssembler::mov32(AddressLiteral dst, Register src) {
3394 if (reachable(dst)) {
3395 movl(as_Address(dst), src);
3396 } else {
3397 lea(rscratch1, dst);
3398 movl(Address(rscratch1, 0), src);
3399 }
3400 }
3401
3402 void MacroAssembler::mov32(Register dst, AddressLiteral src) {
3403 if (reachable(src)) {
3404 movl(dst, as_Address(src));
3405 } else {
3406 lea(rscratch1, src);
3407 movl(dst, Address(rscratch1, 0));
3408 }
3409 }
3410
3411 // C++ bool manipulation
3412
3413 void MacroAssembler::movbool(Register dst, Address src) {
3414 if(sizeof(bool) == 1)
3415 movb(dst, src);
3416 else if(sizeof(bool) == 2)
3417 movw(dst, src);
3418 else if(sizeof(bool) == 4)
3419 movl(dst, src);
3420 else
3421 // unsupported
3422 ShouldNotReachHere();
3423 }
3424
3425 void MacroAssembler::movbool(Address dst, bool boolconst) {
3426 if(sizeof(bool) == 1)
3427 movb(dst, (int) boolconst);
3428 else if(sizeof(bool) == 2)
3429 movw(dst, (int) boolconst);
3430 else if(sizeof(bool) == 4)
3431 movl(dst, (int) boolconst);
3432 else
3433 // unsupported
3434 ShouldNotReachHere();
3435 }
3436
3437 void MacroAssembler::movbool(Address dst, Register src) {
3438 if(sizeof(bool) == 1)
3439 movb(dst, src);
3440 else if(sizeof(bool) == 2)
3441 movw(dst, src);
3442 else if(sizeof(bool) == 4)
3443 movl(dst, src);
3444 else
3445 // unsupported
3446 ShouldNotReachHere();
3447 }
3448
3449 void MacroAssembler::movbyte(ArrayAddress dst, int src) {
3450 movb(as_Address(dst), src);
3451 }
3452
3453 void MacroAssembler::movdl(XMMRegister dst, AddressLiteral src) {
3454 if (reachable(src)) {
3455 movdl(dst, as_Address(src));
3456 } else {
3457 lea(rscratch1, src);
3458 movdl(dst, Address(rscratch1, 0));
3459 }
3460 }
3461
3462 void MacroAssembler::movq(XMMRegister dst, AddressLiteral src) {
3463 if (reachable(src)) {
3464 movq(dst, as_Address(src));
3465 } else {
3466 lea(rscratch1, src);
3467 movq(dst, Address(rscratch1, 0));
3468 }
3469 }
3470
3471 void MacroAssembler::setvectmask(Register dst, Register src) {
3472 Assembler::movl(dst, 1);
3473 Assembler::shlxl(dst, dst, src);
3474 Assembler::decl(dst);
3475 Assembler::kmovdl(k1, dst);
3476 Assembler::movl(dst, src);
3477 }
3478
3479 void MacroAssembler::restorevectmask() {
3480 Assembler::knotwl(k1, k0);
3481 }
3482
3483 void MacroAssembler::movdbl(XMMRegister dst, AddressLiteral src) {
3484 if (reachable(src)) {
3485 if (UseXmmLoadAndClearUpper) {
3486 movsd (dst, as_Address(src));
3487 } else {
3488 movlpd(dst, as_Address(src));
3489 }
3490 } else {
3491 lea(rscratch1, src);
3492 if (UseXmmLoadAndClearUpper) {
3493 movsd (dst, Address(rscratch1, 0));
3494 } else {
3495 movlpd(dst, Address(rscratch1, 0));
3496 }
3497 }
3498 }
3499
3500 void MacroAssembler::movflt(XMMRegister dst, AddressLiteral src) {
3501 if (reachable(src)) {
3502 movss(dst, as_Address(src));
3503 } else {
3504 lea(rscratch1, src);
3505 movss(dst, Address(rscratch1, 0));
3506 }
3507 }
3508
3509 void MacroAssembler::movptr(Register dst, Register src) {
3510 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src));
3511 }
3512
3513 void MacroAssembler::movptr(Register dst, Address src) {
3514 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src));
3515 }
3516
3517 // src should NEVER be a real pointer. Use AddressLiteral for true pointers
3518 void MacroAssembler::movptr(Register dst, intptr_t src) {
3519 LP64_ONLY(mov64(dst, src)) NOT_LP64(movl(dst, src));
3520 }
3521
3522 void MacroAssembler::movptr(Address dst, Register src) {
3523 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src));
3524 }
3525
3526 void MacroAssembler::movdqu(Address dst, XMMRegister src) {
3527 if (UseAVX > 2 && !VM_Version::supports_avx512vl() && (src->encoding() > 15)) {
3528 Assembler::vextractf32x4(dst, src, 0);
3529 } else {
3530 Assembler::movdqu(dst, src);
3531 }
3532 }
3533
3534 void MacroAssembler::movdqu(XMMRegister dst, Address src) {
3535 if (UseAVX > 2 && !VM_Version::supports_avx512vl() && (dst->encoding() > 15)) {
3536 Assembler::vinsertf32x4(dst, dst, src, 0);
3537 } else {
3538 Assembler::movdqu(dst, src);
3539 }
3540 }
3541
3542 void MacroAssembler::movdqu(XMMRegister dst, XMMRegister src) {
3543 if (UseAVX > 2 && !VM_Version::supports_avx512vl()) {
3544 Assembler::evmovdqul(dst, src, Assembler::AVX_512bit);
3545 } else {
3546 Assembler::movdqu(dst, src);
3547 }
3548 }
3549
3550 void MacroAssembler::movdqu(XMMRegister dst, AddressLiteral src, Register scratchReg) {
3551 if (reachable(src)) {
3552 movdqu(dst, as_Address(src));
3553 } else {
3554 lea(scratchReg, src);
3555 movdqu(dst, Address(scratchReg, 0));
3556 }
3557 }
3558
3559 void MacroAssembler::vmovdqu(Address dst, XMMRegister src) {
3560 if (UseAVX > 2 && !VM_Version::supports_avx512vl() && (src->encoding() > 15)) {
3561 vextractf64x4_low(dst, src);
3562 } else {
3563 Assembler::vmovdqu(dst, src);
3564 }
3565 }
3566
3567 void MacroAssembler::vmovdqu(XMMRegister dst, Address src) {
3568 if (UseAVX > 2 && !VM_Version::supports_avx512vl() && (dst->encoding() > 15)) {
3569 vinsertf64x4_low(dst, src);
3570 } else {
3571 Assembler::vmovdqu(dst, src);
3572 }
3573 }
3574
3575 void MacroAssembler::vmovdqu(XMMRegister dst, XMMRegister src) {
3576 if (UseAVX > 2 && !VM_Version::supports_avx512vl()) {
3577 Assembler::evmovdqul(dst, src, Assembler::AVX_512bit);
3578 }
3579 else {
3580 Assembler::vmovdqu(dst, src);
3581 }
3582 }
3583
3584 void MacroAssembler::vmovdqu(XMMRegister dst, AddressLiteral src) {
3585 if (reachable(src)) {
3586 vmovdqu(dst, as_Address(src));
3587 }
3588 else {
3589 lea(rscratch1, src);
3590 vmovdqu(dst, Address(rscratch1, 0));
3591 }
3592 }
3593
3594 void MacroAssembler::movdqa(XMMRegister dst, AddressLiteral src) {
3595 if (reachable(src)) {
3596 Assembler::movdqa(dst, as_Address(src));
3597 } else {
3598 lea(rscratch1, src);
3599 Assembler::movdqa(dst, Address(rscratch1, 0));
3600 }
3601 }
3602
3603 void MacroAssembler::movsd(XMMRegister dst, AddressLiteral src) {
3604 if (reachable(src)) {
3605 Assembler::movsd(dst, as_Address(src));
3606 } else {
3607 lea(rscratch1, src);
3608 Assembler::movsd(dst, Address(rscratch1, 0));
3609 }
3610 }
3611
3612 void MacroAssembler::movss(XMMRegister dst, AddressLiteral src) {
3613 if (reachable(src)) {
3614 Assembler::movss(dst, as_Address(src));
3615 } else {
3616 lea(rscratch1, src);
3617 Assembler::movss(dst, Address(rscratch1, 0));
3618 }
3619 }
3620
3621 void MacroAssembler::mulsd(XMMRegister dst, AddressLiteral src) {
3622 if (reachable(src)) {
3623 Assembler::mulsd(dst, as_Address(src));
3624 } else {
3625 lea(rscratch1, src);
3626 Assembler::mulsd(dst, Address(rscratch1, 0));
3627 }
3628 }
3629
3630 void MacroAssembler::mulss(XMMRegister dst, AddressLiteral src) {
3631 if (reachable(src)) {
3632 Assembler::mulss(dst, as_Address(src));
3633 } else {
3634 lea(rscratch1, src);
3635 Assembler::mulss(dst, Address(rscratch1, 0));
3636 }
3637 }
3638
3639 void MacroAssembler::null_check(Register reg, int offset) {
3640 if (needs_explicit_null_check(offset)) {
3641 // provoke OS NULL exception if reg = NULL by
3642 // accessing M[reg] w/o changing any (non-CC) registers
3643 // NOTE: cmpl is plenty here to provoke a segv
3644 cmpptr(rax, Address(reg, 0));
3645 // Note: should probably use testl(rax, Address(reg, 0));
3646 // may be shorter code (however, this version of
3647 // testl needs to be implemented first)
3648 } else {
3649 // nothing to do, (later) access of M[reg + offset]
3650 // will provoke OS NULL exception if reg = NULL
3651 }
3652 }
3653
3654 void MacroAssembler::os_breakpoint() {
3655 // instead of directly emitting a breakpoint, call os:breakpoint for better debugability
3656 // (e.g., MSVC can't call ps() otherwise)
3657 call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint)));
3658 }
3659
3660 void MacroAssembler::unimplemented(const char* what) {
3661 const char* buf = NULL;
3662 {
3663 ResourceMark rm;
3664 stringStream ss;
3665 ss.print("unimplemented: %s", what);
3666 buf = code_string(ss.as_string());
3667 }
3668 stop(buf);
3669 }
3670
3671 #ifdef _LP64
3672 #define XSTATE_BV 0x200
3673 #endif
3674
3675 void MacroAssembler::pop_CPU_state() {
3676 pop_FPU_state();
3677 pop_IU_state();
3678 }
3679
3680 void MacroAssembler::pop_FPU_state() {
3681 #ifndef _LP64
3682 frstor(Address(rsp, 0));
3683 #else
3684 fxrstor(Address(rsp, 0));
3685 #endif
3686 addptr(rsp, FPUStateSizeInWords * wordSize);
3687 }
3688
3689 void MacroAssembler::pop_IU_state() {
3690 popa();
3691 LP64_ONLY(addq(rsp, 8));
3692 popf();
3693 }
3694
3695 // Save Integer and Float state
3696 // Warning: Stack must be 16 byte aligned (64bit)
3697 void MacroAssembler::push_CPU_state() {
3698 push_IU_state();
3699 push_FPU_state();
3700 }
3701
3702 void MacroAssembler::push_FPU_state() {
3703 subptr(rsp, FPUStateSizeInWords * wordSize);
3704 #ifndef _LP64
3705 fnsave(Address(rsp, 0));
3706 fwait();
3707 #else
3708 fxsave(Address(rsp, 0));
3709 #endif // LP64
3710 }
3711
3712 void MacroAssembler::push_IU_state() {
3713 // Push flags first because pusha kills them
3714 pushf();
3715 // Make sure rsp stays 16-byte aligned
3716 LP64_ONLY(subq(rsp, 8));
3717 pusha();
3718 }
3719
3720 void MacroAssembler::reset_last_Java_frame(Register java_thread, bool clear_fp) { // determine java_thread register
3721 if (!java_thread->is_valid()) {
3722 java_thread = rdi;
3723 get_thread(java_thread);
3724 }
3725 // we must set sp to zero to clear frame
3726 movptr(Address(java_thread, JavaThread::last_Java_sp_offset()), NULL_WORD);
3727 if (clear_fp) {
3728 movptr(Address(java_thread, JavaThread::last_Java_fp_offset()), NULL_WORD);
3729 }
3730
3731 // Always clear the pc because it could have been set by make_walkable()
3732 movptr(Address(java_thread, JavaThread::last_Java_pc_offset()), NULL_WORD);
3733
3734 vzeroupper();
3735 }
3736
3737 void MacroAssembler::restore_rax(Register tmp) {
3738 if (tmp == noreg) pop(rax);
3739 else if (tmp != rax) mov(rax, tmp);
3740 }
3741
3742 void MacroAssembler::round_to(Register reg, int modulus) {
3743 addptr(reg, modulus - 1);
3744 andptr(reg, -modulus);
3745 }
3746
3747 void MacroAssembler::save_rax(Register tmp) {
3748 if (tmp == noreg) push(rax);
3749 else if (tmp != rax) mov(tmp, rax);
3750 }
3751
3752 // Write serialization page so VM thread can do a pseudo remote membar.
3753 // We use the current thread pointer to calculate a thread specific
3754 // offset to write to within the page. This minimizes bus traffic
3755 // due to cache line collision.
3756 void MacroAssembler::serialize_memory(Register thread, Register tmp) {
3757 movl(tmp, thread);
3758 shrl(tmp, os::get_serialize_page_shift_count());
3759 andl(tmp, (os::vm_page_size() - sizeof(int)));
3760
3761 Address index(noreg, tmp, Address::times_1);
3762 ExternalAddress page(os::get_memory_serialize_page());
3763
3764 // Size of store must match masking code above
3765 movl(as_Address(ArrayAddress(page, index)), tmp);
3766 }
3767
3768 void MacroAssembler::safepoint_poll(Label& slow_path, Register thread_reg, Register temp_reg) {
3769 if (SafepointMechanism::uses_thread_local_poll()) {
3770 #ifdef _LP64
3771 assert(thread_reg == r15_thread, "should be");
3772 #else
3773 if (thread_reg == noreg) {
3774 thread_reg = temp_reg;
3775 get_thread(thread_reg);
3776 }
3777 #endif
3778 testb(Address(thread_reg, Thread::polling_page_offset()), SafepointMechanism::poll_bit());
3779 jcc(Assembler::notZero, slow_path); // handshake bit set implies poll
3780 } else {
3781 cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
3782 SafepointSynchronize::_not_synchronized);
3783 jcc(Assembler::notEqual, slow_path);
3784 }
3785 }
3786
3787 // Calls to C land
3788 //
3789 // When entering C land, the rbp, & rsp of the last Java frame have to be recorded
3790 // in the (thread-local) JavaThread object. When leaving C land, the last Java fp
3791 // has to be reset to 0. This is required to allow proper stack traversal.
3792 void MacroAssembler::set_last_Java_frame(Register java_thread,
3793 Register last_java_sp,
3794 Register last_java_fp,
3795 address last_java_pc) {
3796 vzeroupper();
3797 // determine java_thread register
3798 if (!java_thread->is_valid()) {
3799 java_thread = rdi;
3800 get_thread(java_thread);
3801 }
3802 // determine last_java_sp register
3803 if (!last_java_sp->is_valid()) {
3804 last_java_sp = rsp;
3805 }
3806
3807 // last_java_fp is optional
3808
3809 if (last_java_fp->is_valid()) {
3810 movptr(Address(java_thread, JavaThread::last_Java_fp_offset()), last_java_fp);
3811 }
3812
3813 // last_java_pc is optional
3814
3815 if (last_java_pc != NULL) {
3816 lea(Address(java_thread,
3817 JavaThread::frame_anchor_offset() + JavaFrameAnchor::last_Java_pc_offset()),
3818 InternalAddress(last_java_pc));
3819
3820 }
3821 movptr(Address(java_thread, JavaThread::last_Java_sp_offset()), last_java_sp);
3822 }
3823
3824 void MacroAssembler::shlptr(Register dst, int imm8) {
3825 LP64_ONLY(shlq(dst, imm8)) NOT_LP64(shll(dst, imm8));
3826 }
3827
3828 void MacroAssembler::shrptr(Register dst, int imm8) {
3829 LP64_ONLY(shrq(dst, imm8)) NOT_LP64(shrl(dst, imm8));
3830 }
3831
3832 void MacroAssembler::sign_extend_byte(Register reg) {
3833 if (LP64_ONLY(true ||) (VM_Version::is_P6() && reg->has_byte_register())) {
3834 movsbl(reg, reg); // movsxb
3835 } else {
3836 shll(reg, 24);
3837 sarl(reg, 24);
3838 }
3839 }
3840
3841 void MacroAssembler::sign_extend_short(Register reg) {
3842 if (LP64_ONLY(true ||) VM_Version::is_P6()) {
3843 movswl(reg, reg); // movsxw
3844 } else {
3845 shll(reg, 16);
3846 sarl(reg, 16);
3847 }
3848 }
3849
3850 void MacroAssembler::testl(Register dst, AddressLiteral src) {
3851 assert(reachable(src), "Address should be reachable");
3852 testl(dst, as_Address(src));
3853 }
3854
3855 void MacroAssembler::pcmpeqb(XMMRegister dst, XMMRegister src) {
3856 int dst_enc = dst->encoding();
3857 int src_enc = src->encoding();
3858 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
3859 Assembler::pcmpeqb(dst, src);
3860 } else if ((dst_enc < 16) && (src_enc < 16)) {
3861 Assembler::pcmpeqb(dst, src);
3862 } else if (src_enc < 16) {
3863 subptr(rsp, 64);
3864 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
3865 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
3866 Assembler::pcmpeqb(xmm0, src);
3867 movdqu(dst, xmm0);
3868 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
3869 addptr(rsp, 64);
3870 } else if (dst_enc < 16) {
3871 subptr(rsp, 64);
3872 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
3873 evmovdqul(xmm0, src, Assembler::AVX_512bit);
3874 Assembler::pcmpeqb(dst, xmm0);
3875 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
3876 addptr(rsp, 64);
3877 } else {
3878 subptr(rsp, 64);
3879 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
3880 subptr(rsp, 64);
3881 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
3882 movdqu(xmm0, src);
3883 movdqu(xmm1, dst);
3884 Assembler::pcmpeqb(xmm1, xmm0);
3885 movdqu(dst, xmm1);
3886 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
3887 addptr(rsp, 64);
3888 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
3889 addptr(rsp, 64);
3890 }
3891 }
3892
3893 void MacroAssembler::pcmpeqw(XMMRegister dst, XMMRegister src) {
3894 int dst_enc = dst->encoding();
3895 int src_enc = src->encoding();
3896 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
3897 Assembler::pcmpeqw(dst, src);
3898 } else if ((dst_enc < 16) && (src_enc < 16)) {
3899 Assembler::pcmpeqw(dst, src);
3900 } else if (src_enc < 16) {
3901 subptr(rsp, 64);
3902 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
3903 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
3904 Assembler::pcmpeqw(xmm0, src);
3905 movdqu(dst, xmm0);
3906 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
3907 addptr(rsp, 64);
3908 } else if (dst_enc < 16) {
3909 subptr(rsp, 64);
3910 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
3911 evmovdqul(xmm0, src, Assembler::AVX_512bit);
3912 Assembler::pcmpeqw(dst, xmm0);
3913 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
3914 addptr(rsp, 64);
3915 } else {
3916 subptr(rsp, 64);
3917 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
3918 subptr(rsp, 64);
3919 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
3920 movdqu(xmm0, src);
3921 movdqu(xmm1, dst);
3922 Assembler::pcmpeqw(xmm1, xmm0);
3923 movdqu(dst, xmm1);
3924 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
3925 addptr(rsp, 64);
3926 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
3927 addptr(rsp, 64);
3928 }
3929 }
3930
3931 void MacroAssembler::pcmpestri(XMMRegister dst, Address src, int imm8) {
3932 int dst_enc = dst->encoding();
3933 if (dst_enc < 16) {
3934 Assembler::pcmpestri(dst, src, imm8);
3935 } else {
3936 subptr(rsp, 64);
3937 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
3938 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
3939 Assembler::pcmpestri(xmm0, src, imm8);
3940 movdqu(dst, xmm0);
3941 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
3942 addptr(rsp, 64);
3943 }
3944 }
3945
3946 void MacroAssembler::pcmpestri(XMMRegister dst, XMMRegister src, int imm8) {
3947 int dst_enc = dst->encoding();
3948 int src_enc = src->encoding();
3949 if ((dst_enc < 16) && (src_enc < 16)) {
3950 Assembler::pcmpestri(dst, src, imm8);
3951 } else if (src_enc < 16) {
3952 subptr(rsp, 64);
3953 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
3954 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
3955 Assembler::pcmpestri(xmm0, src, imm8);
3956 movdqu(dst, xmm0);
3957 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
3958 addptr(rsp, 64);
3959 } else if (dst_enc < 16) {
3960 subptr(rsp, 64);
3961 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
3962 evmovdqul(xmm0, src, Assembler::AVX_512bit);
3963 Assembler::pcmpestri(dst, xmm0, imm8);
3964 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
3965 addptr(rsp, 64);
3966 } else {
3967 subptr(rsp, 64);
3968 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
3969 subptr(rsp, 64);
3970 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
3971 movdqu(xmm0, src);
3972 movdqu(xmm1, dst);
3973 Assembler::pcmpestri(xmm1, xmm0, imm8);
3974 movdqu(dst, xmm1);
3975 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
3976 addptr(rsp, 64);
3977 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
3978 addptr(rsp, 64);
3979 }
3980 }
3981
3982 void MacroAssembler::pmovzxbw(XMMRegister dst, XMMRegister src) {
3983 int dst_enc = dst->encoding();
3984 int src_enc = src->encoding();
3985 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
3986 Assembler::pmovzxbw(dst, src);
3987 } else if ((dst_enc < 16) && (src_enc < 16)) {
3988 Assembler::pmovzxbw(dst, src);
3989 } else if (src_enc < 16) {
3990 subptr(rsp, 64);
3991 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
3992 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
3993 Assembler::pmovzxbw(xmm0, src);
3994 movdqu(dst, xmm0);
3995 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
3996 addptr(rsp, 64);
3997 } else if (dst_enc < 16) {
3998 subptr(rsp, 64);
3999 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4000 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4001 Assembler::pmovzxbw(dst, xmm0);
4002 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4003 addptr(rsp, 64);
4004 } else {
4005 subptr(rsp, 64);
4006 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4007 subptr(rsp, 64);
4008 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4009 movdqu(xmm0, src);
4010 movdqu(xmm1, dst);
4011 Assembler::pmovzxbw(xmm1, xmm0);
4012 movdqu(dst, xmm1);
4013 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4014 addptr(rsp, 64);
4015 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4016 addptr(rsp, 64);
4017 }
4018 }
4019
4020 void MacroAssembler::pmovzxbw(XMMRegister dst, Address src) {
4021 int dst_enc = dst->encoding();
4022 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4023 Assembler::pmovzxbw(dst, src);
4024 } else if (dst_enc < 16) {
4025 Assembler::pmovzxbw(dst, src);
4026 } else {
4027 subptr(rsp, 64);
4028 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4029 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4030 Assembler::pmovzxbw(xmm0, src);
4031 movdqu(dst, xmm0);
4032 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4033 addptr(rsp, 64);
4034 }
4035 }
4036
4037 void MacroAssembler::pmovmskb(Register dst, XMMRegister src) {
4038 int src_enc = src->encoding();
4039 if (src_enc < 16) {
4040 Assembler::pmovmskb(dst, src);
4041 } else {
4042 subptr(rsp, 64);
4043 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4044 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4045 Assembler::pmovmskb(dst, xmm0);
4046 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4047 addptr(rsp, 64);
4048 }
4049 }
4050
4051 void MacroAssembler::ptest(XMMRegister dst, XMMRegister src) {
4052 int dst_enc = dst->encoding();
4053 int src_enc = src->encoding();
4054 if ((dst_enc < 16) && (src_enc < 16)) {
4055 Assembler::ptest(dst, src);
4056 } else if (src_enc < 16) {
4057 subptr(rsp, 64);
4058 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4059 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4060 Assembler::ptest(xmm0, src);
4061 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4062 addptr(rsp, 64);
4063 } else if (dst_enc < 16) {
4064 subptr(rsp, 64);
4065 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4066 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4067 Assembler::ptest(dst, xmm0);
4068 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4069 addptr(rsp, 64);
4070 } else {
4071 subptr(rsp, 64);
4072 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4073 subptr(rsp, 64);
4074 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4075 movdqu(xmm0, src);
4076 movdqu(xmm1, dst);
4077 Assembler::ptest(xmm1, xmm0);
4078 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4079 addptr(rsp, 64);
4080 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4081 addptr(rsp, 64);
4082 }
4083 }
4084
4085 void MacroAssembler::sqrtsd(XMMRegister dst, AddressLiteral src) {
4086 if (reachable(src)) {
4087 Assembler::sqrtsd(dst, as_Address(src));
4088 } else {
4089 lea(rscratch1, src);
4090 Assembler::sqrtsd(dst, Address(rscratch1, 0));
4091 }
4092 }
4093
4094 void MacroAssembler::sqrtss(XMMRegister dst, AddressLiteral src) {
4095 if (reachable(src)) {
4096 Assembler::sqrtss(dst, as_Address(src));
4097 } else {
4098 lea(rscratch1, src);
4099 Assembler::sqrtss(dst, Address(rscratch1, 0));
4100 }
4101 }
4102
4103 void MacroAssembler::subsd(XMMRegister dst, AddressLiteral src) {
4104 if (reachable(src)) {
4105 Assembler::subsd(dst, as_Address(src));
4106 } else {
4107 lea(rscratch1, src);
4108 Assembler::subsd(dst, Address(rscratch1, 0));
4109 }
4110 }
4111
4112 void MacroAssembler::subss(XMMRegister dst, AddressLiteral src) {
4113 if (reachable(src)) {
4114 Assembler::subss(dst, as_Address(src));
4115 } else {
4116 lea(rscratch1, src);
4117 Assembler::subss(dst, Address(rscratch1, 0));
4118 }
4119 }
4120
4121 void MacroAssembler::ucomisd(XMMRegister dst, AddressLiteral src) {
4122 if (reachable(src)) {
4123 Assembler::ucomisd(dst, as_Address(src));
4124 } else {
4125 lea(rscratch1, src);
4126 Assembler::ucomisd(dst, Address(rscratch1, 0));
4127 }
4128 }
4129
4130 void MacroAssembler::ucomiss(XMMRegister dst, AddressLiteral src) {
4131 if (reachable(src)) {
4132 Assembler::ucomiss(dst, as_Address(src));
4133 } else {
4134 lea(rscratch1, src);
4135 Assembler::ucomiss(dst, Address(rscratch1, 0));
4136 }
4137 }
4138
4139 void MacroAssembler::xorpd(XMMRegister dst, AddressLiteral src) {
4140 // Used in sign-bit flipping with aligned address.
4141 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes");
4142 if (reachable(src)) {
4143 Assembler::xorpd(dst, as_Address(src));
4144 } else {
4145 lea(rscratch1, src);
4146 Assembler::xorpd(dst, Address(rscratch1, 0));
4147 }
4148 }
4149
4150 void MacroAssembler::xorpd(XMMRegister dst, XMMRegister src) {
4151 if (UseAVX > 2 && !VM_Version::supports_avx512dq() && (dst->encoding() == src->encoding())) {
4152 Assembler::vpxor(dst, dst, src, Assembler::AVX_512bit);
4153 }
4154 else {
4155 Assembler::xorpd(dst, src);
4156 }
4157 }
4158
4159 void MacroAssembler::xorps(XMMRegister dst, XMMRegister src) {
4160 if (UseAVX > 2 && !VM_Version::supports_avx512dq() && (dst->encoding() == src->encoding())) {
4161 Assembler::vpxor(dst, dst, src, Assembler::AVX_512bit);
4162 } else {
4163 Assembler::xorps(dst, src);
4164 }
4165 }
4166
4167 void MacroAssembler::xorps(XMMRegister dst, AddressLiteral src) {
4168 // Used in sign-bit flipping with aligned address.
4169 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes");
4170 if (reachable(src)) {
4171 Assembler::xorps(dst, as_Address(src));
4172 } else {
4173 lea(rscratch1, src);
4174 Assembler::xorps(dst, Address(rscratch1, 0));
4175 }
4176 }
4177
4178 void MacroAssembler::pshufb(XMMRegister dst, AddressLiteral src) {
4179 // Used in sign-bit flipping with aligned address.
4180 bool aligned_adr = (((intptr_t)src.target() & 15) == 0);
4181 assert((UseAVX > 0) || aligned_adr, "SSE mode requires address alignment 16 bytes");
4182 if (reachable(src)) {
4183 Assembler::pshufb(dst, as_Address(src));
4184 } else {
4185 lea(rscratch1, src);
4186 Assembler::pshufb(dst, Address(rscratch1, 0));
4187 }
4188 }
4189
4190 // AVX 3-operands instructions
4191
4192 void MacroAssembler::vaddsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
4193 if (reachable(src)) {
4194 vaddsd(dst, nds, as_Address(src));
4195 } else {
4196 lea(rscratch1, src);
4197 vaddsd(dst, nds, Address(rscratch1, 0));
4198 }
4199 }
4200
4201 void MacroAssembler::vaddss(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
4202 if (reachable(src)) {
4203 vaddss(dst, nds, as_Address(src));
4204 } else {
4205 lea(rscratch1, src);
4206 vaddss(dst, nds, Address(rscratch1, 0));
4207 }
4208 }
4209
4210 void MacroAssembler::vabsss(XMMRegister dst, XMMRegister nds, XMMRegister src, AddressLiteral negate_field, int vector_len) {
4211 int dst_enc = dst->encoding();
4212 int nds_enc = nds->encoding();
4213 int src_enc = src->encoding();
4214 if ((dst_enc < 16) && (nds_enc < 16)) {
4215 vandps(dst, nds, negate_field, vector_len);
4216 } else if ((src_enc < 16) && (dst_enc < 16)) {
4217 evmovdqul(src, nds, Assembler::AVX_512bit);
4218 vandps(dst, src, negate_field, vector_len);
4219 } else if (src_enc < 16) {
4220 evmovdqul(src, nds, Assembler::AVX_512bit);
4221 vandps(src, src, negate_field, vector_len);
4222 evmovdqul(dst, src, Assembler::AVX_512bit);
4223 } else if (dst_enc < 16) {
4224 evmovdqul(src, xmm0, Assembler::AVX_512bit);
4225 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4226 vandps(dst, xmm0, negate_field, vector_len);
4227 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4228 } else {
4229 if (src_enc != dst_enc) {
4230 evmovdqul(src, xmm0, Assembler::AVX_512bit);
4231 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4232 vandps(xmm0, xmm0, negate_field, vector_len);
4233 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4234 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4235 } else {
4236 subptr(rsp, 64);
4237 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4238 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4239 vandps(xmm0, xmm0, negate_field, vector_len);
4240 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4241 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4242 addptr(rsp, 64);
4243 }
4244 }
4245 }
4246
4247 void MacroAssembler::vabssd(XMMRegister dst, XMMRegister nds, XMMRegister src, AddressLiteral negate_field, int vector_len) {
4248 int dst_enc = dst->encoding();
4249 int nds_enc = nds->encoding();
4250 int src_enc = src->encoding();
4251 if ((dst_enc < 16) && (nds_enc < 16)) {
4252 vandpd(dst, nds, negate_field, vector_len);
4253 } else if ((src_enc < 16) && (dst_enc < 16)) {
4254 evmovdqul(src, nds, Assembler::AVX_512bit);
4255 vandpd(dst, src, negate_field, vector_len);
4256 } else if (src_enc < 16) {
4257 evmovdqul(src, nds, Assembler::AVX_512bit);
4258 vandpd(src, src, negate_field, vector_len);
4259 evmovdqul(dst, src, Assembler::AVX_512bit);
4260 } else if (dst_enc < 16) {
4261 evmovdqul(src, xmm0, Assembler::AVX_512bit);
4262 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4263 vandpd(dst, xmm0, negate_field, vector_len);
4264 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4265 } else {
4266 if (src_enc != dst_enc) {
4267 evmovdqul(src, xmm0, Assembler::AVX_512bit);
4268 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4269 vandpd(xmm0, xmm0, negate_field, vector_len);
4270 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4271 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4272 } else {
4273 subptr(rsp, 64);
4274 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4275 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4276 vandpd(xmm0, xmm0, negate_field, vector_len);
4277 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4278 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4279 addptr(rsp, 64);
4280 }
4281 }
4282 }
4283
4284 void MacroAssembler::vpaddb(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
4285 int dst_enc = dst->encoding();
4286 int nds_enc = nds->encoding();
4287 int src_enc = src->encoding();
4288 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4289 Assembler::vpaddb(dst, nds, src, vector_len);
4290 } else if ((dst_enc < 16) && (src_enc < 16)) {
4291 Assembler::vpaddb(dst, dst, src, vector_len);
4292 } else if ((dst_enc < 16) && (nds_enc < 16)) {
4293 // use nds as scratch for src
4294 evmovdqul(nds, src, Assembler::AVX_512bit);
4295 Assembler::vpaddb(dst, dst, nds, vector_len);
4296 } else if ((src_enc < 16) && (nds_enc < 16)) {
4297 // use nds as scratch for dst
4298 evmovdqul(nds, dst, Assembler::AVX_512bit);
4299 Assembler::vpaddb(nds, nds, src, vector_len);
4300 evmovdqul(dst, nds, Assembler::AVX_512bit);
4301 } else if (dst_enc < 16) {
4302 // use nds as scatch for xmm0 to hold src
4303 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4304 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4305 Assembler::vpaddb(dst, dst, xmm0, vector_len);
4306 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4307 } else {
4308 // worse case scenario, all regs are in the upper bank
4309 subptr(rsp, 64);
4310 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4311 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4312 evmovdqul(xmm1, src, Assembler::AVX_512bit);
4313 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4314 Assembler::vpaddb(xmm0, xmm0, xmm1, vector_len);
4315 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4316 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4317 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4318 addptr(rsp, 64);
4319 }
4320 }
4321
4322 void MacroAssembler::vpaddb(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
4323 int dst_enc = dst->encoding();
4324 int nds_enc = nds->encoding();
4325 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4326 Assembler::vpaddb(dst, nds, src, vector_len);
4327 } else if (dst_enc < 16) {
4328 Assembler::vpaddb(dst, dst, src, vector_len);
4329 } else if (nds_enc < 16) {
4330 // implies dst_enc in upper bank with src as scratch
4331 evmovdqul(nds, dst, Assembler::AVX_512bit);
4332 Assembler::vpaddb(nds, nds, src, vector_len);
4333 evmovdqul(dst, nds, Assembler::AVX_512bit);
4334 } else {
4335 // worse case scenario, all regs in upper bank
4336 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4337 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4338 Assembler::vpaddb(xmm0, xmm0, src, vector_len);
4339 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4340 }
4341 }
4342
4343 void MacroAssembler::vpaddw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
4344 int dst_enc = dst->encoding();
4345 int nds_enc = nds->encoding();
4346 int src_enc = src->encoding();
4347 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4348 Assembler::vpaddw(dst, nds, src, vector_len);
4349 } else if ((dst_enc < 16) && (src_enc < 16)) {
4350 Assembler::vpaddw(dst, dst, src, vector_len);
4351 } else if ((dst_enc < 16) && (nds_enc < 16)) {
4352 // use nds as scratch for src
4353 evmovdqul(nds, src, Assembler::AVX_512bit);
4354 Assembler::vpaddw(dst, dst, nds, vector_len);
4355 } else if ((src_enc < 16) && (nds_enc < 16)) {
4356 // use nds as scratch for dst
4357 evmovdqul(nds, dst, Assembler::AVX_512bit);
4358 Assembler::vpaddw(nds, nds, src, vector_len);
4359 evmovdqul(dst, nds, Assembler::AVX_512bit);
4360 } else if (dst_enc < 16) {
4361 // use nds as scatch for xmm0 to hold src
4362 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4363 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4364 Assembler::vpaddw(dst, dst, xmm0, vector_len);
4365 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4366 } else {
4367 // worse case scenario, all regs are in the upper bank
4368 subptr(rsp, 64);
4369 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4370 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4371 evmovdqul(xmm1, src, Assembler::AVX_512bit);
4372 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4373 Assembler::vpaddw(xmm0, xmm0, xmm1, vector_len);
4374 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4375 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4376 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4377 addptr(rsp, 64);
4378 }
4379 }
4380
4381 void MacroAssembler::vpaddw(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
4382 int dst_enc = dst->encoding();
4383 int nds_enc = nds->encoding();
4384 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4385 Assembler::vpaddw(dst, nds, src, vector_len);
4386 } else if (dst_enc < 16) {
4387 Assembler::vpaddw(dst, dst, src, vector_len);
4388 } else if (nds_enc < 16) {
4389 // implies dst_enc in upper bank with src as scratch
4390 evmovdqul(nds, dst, Assembler::AVX_512bit);
4391 Assembler::vpaddw(nds, nds, src, vector_len);
4392 evmovdqul(dst, nds, Assembler::AVX_512bit);
4393 } else {
4394 // worse case scenario, all regs in upper bank
4395 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4396 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4397 Assembler::vpaddw(xmm0, xmm0, src, vector_len);
4398 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4399 }
4400 }
4401
4402 void MacroAssembler::vpand(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len) {
4403 if (reachable(src)) {
4404 Assembler::vpand(dst, nds, as_Address(src), vector_len);
4405 } else {
4406 lea(rscratch1, src);
4407 Assembler::vpand(dst, nds, Address(rscratch1, 0), vector_len);
4408 }
4409 }
4410
4411 void MacroAssembler::vpbroadcastw(XMMRegister dst, XMMRegister src) {
4412 int dst_enc = dst->encoding();
4413 int src_enc = src->encoding();
4414 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4415 Assembler::vpbroadcastw(dst, src);
4416 } else if ((dst_enc < 16) && (src_enc < 16)) {
4417 Assembler::vpbroadcastw(dst, src);
4418 } else if (src_enc < 16) {
4419 subptr(rsp, 64);
4420 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4421 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4422 Assembler::vpbroadcastw(xmm0, src);
4423 movdqu(dst, xmm0);
4424 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4425 addptr(rsp, 64);
4426 } else if (dst_enc < 16) {
4427 subptr(rsp, 64);
4428 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4429 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4430 Assembler::vpbroadcastw(dst, xmm0);
4431 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4432 addptr(rsp, 64);
4433 } else {
4434 subptr(rsp, 64);
4435 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4436 subptr(rsp, 64);
4437 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4438 movdqu(xmm0, src);
4439 movdqu(xmm1, dst);
4440 Assembler::vpbroadcastw(xmm1, xmm0);
4441 movdqu(dst, xmm1);
4442 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4443 addptr(rsp, 64);
4444 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4445 addptr(rsp, 64);
4446 }
4447 }
4448
4449 void MacroAssembler::vpcmpeqb(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
4450 int dst_enc = dst->encoding();
4451 int nds_enc = nds->encoding();
4452 int src_enc = src->encoding();
4453 assert(dst_enc == nds_enc, "");
4454 if ((dst_enc < 16) && (src_enc < 16)) {
4455 Assembler::vpcmpeqb(dst, nds, src, vector_len);
4456 } else if (src_enc < 16) {
4457 subptr(rsp, 64);
4458 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4459 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4460 Assembler::vpcmpeqb(xmm0, xmm0, src, vector_len);
4461 movdqu(dst, xmm0);
4462 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4463 addptr(rsp, 64);
4464 } else if (dst_enc < 16) {
4465 subptr(rsp, 64);
4466 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4467 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4468 Assembler::vpcmpeqb(dst, dst, xmm0, vector_len);
4469 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4470 addptr(rsp, 64);
4471 } else {
4472 subptr(rsp, 64);
4473 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4474 subptr(rsp, 64);
4475 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4476 movdqu(xmm0, src);
4477 movdqu(xmm1, dst);
4478 Assembler::vpcmpeqb(xmm1, xmm1, xmm0, vector_len);
4479 movdqu(dst, xmm1);
4480 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4481 addptr(rsp, 64);
4482 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4483 addptr(rsp, 64);
4484 }
4485 }
4486
4487 void MacroAssembler::vpcmpeqw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
4488 int dst_enc = dst->encoding();
4489 int nds_enc = nds->encoding();
4490 int src_enc = src->encoding();
4491 assert(dst_enc == nds_enc, "");
4492 if ((dst_enc < 16) && (src_enc < 16)) {
4493 Assembler::vpcmpeqw(dst, nds, src, vector_len);
4494 } else if (src_enc < 16) {
4495 subptr(rsp, 64);
4496 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4497 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4498 Assembler::vpcmpeqw(xmm0, xmm0, src, vector_len);
4499 movdqu(dst, xmm0);
4500 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4501 addptr(rsp, 64);
4502 } else if (dst_enc < 16) {
4503 subptr(rsp, 64);
4504 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4505 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4506 Assembler::vpcmpeqw(dst, dst, xmm0, vector_len);
4507 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4508 addptr(rsp, 64);
4509 } else {
4510 subptr(rsp, 64);
4511 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4512 subptr(rsp, 64);
4513 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4514 movdqu(xmm0, src);
4515 movdqu(xmm1, dst);
4516 Assembler::vpcmpeqw(xmm1, xmm1, xmm0, vector_len);
4517 movdqu(dst, xmm1);
4518 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4519 addptr(rsp, 64);
4520 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4521 addptr(rsp, 64);
4522 }
4523 }
4524
4525 void MacroAssembler::vpmovzxbw(XMMRegister dst, Address src, int vector_len) {
4526 int dst_enc = dst->encoding();
4527 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4528 Assembler::vpmovzxbw(dst, src, vector_len);
4529 } else if (dst_enc < 16) {
4530 Assembler::vpmovzxbw(dst, src, vector_len);
4531 } else {
4532 subptr(rsp, 64);
4533 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4534 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4535 Assembler::vpmovzxbw(xmm0, src, vector_len);
4536 movdqu(dst, xmm0);
4537 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4538 addptr(rsp, 64);
4539 }
4540 }
4541
4542 void MacroAssembler::vpmovmskb(Register dst, XMMRegister src) {
4543 int src_enc = src->encoding();
4544 if (src_enc < 16) {
4545 Assembler::vpmovmskb(dst, src);
4546 } else {
4547 subptr(rsp, 64);
4548 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4549 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4550 Assembler::vpmovmskb(dst, xmm0);
4551 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4552 addptr(rsp, 64);
4553 }
4554 }
4555
4556 void MacroAssembler::vpmullw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
4557 int dst_enc = dst->encoding();
4558 int nds_enc = nds->encoding();
4559 int src_enc = src->encoding();
4560 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4561 Assembler::vpmullw(dst, nds, src, vector_len);
4562 } else if ((dst_enc < 16) && (src_enc < 16)) {
4563 Assembler::vpmullw(dst, dst, src, vector_len);
4564 } else if ((dst_enc < 16) && (nds_enc < 16)) {
4565 // use nds as scratch for src
4566 evmovdqul(nds, src, Assembler::AVX_512bit);
4567 Assembler::vpmullw(dst, dst, nds, vector_len);
4568 } else if ((src_enc < 16) && (nds_enc < 16)) {
4569 // use nds as scratch for dst
4570 evmovdqul(nds, dst, Assembler::AVX_512bit);
4571 Assembler::vpmullw(nds, nds, src, vector_len);
4572 evmovdqul(dst, nds, Assembler::AVX_512bit);
4573 } else if (dst_enc < 16) {
4574 // use nds as scatch for xmm0 to hold src
4575 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4576 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4577 Assembler::vpmullw(dst, dst, xmm0, vector_len);
4578 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4579 } else {
4580 // worse case scenario, all regs are in the upper bank
4581 subptr(rsp, 64);
4582 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4583 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4584 evmovdqul(xmm1, src, Assembler::AVX_512bit);
4585 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4586 Assembler::vpmullw(xmm0, xmm0, xmm1, vector_len);
4587 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4588 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4589 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4590 addptr(rsp, 64);
4591 }
4592 }
4593
4594 void MacroAssembler::vpmullw(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
4595 int dst_enc = dst->encoding();
4596 int nds_enc = nds->encoding();
4597 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4598 Assembler::vpmullw(dst, nds, src, vector_len);
4599 } else if (dst_enc < 16) {
4600 Assembler::vpmullw(dst, dst, src, vector_len);
4601 } else if (nds_enc < 16) {
4602 // implies dst_enc in upper bank with src as scratch
4603 evmovdqul(nds, dst, Assembler::AVX_512bit);
4604 Assembler::vpmullw(nds, nds, src, vector_len);
4605 evmovdqul(dst, nds, Assembler::AVX_512bit);
4606 } else {
4607 // worse case scenario, all regs in upper bank
4608 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4609 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4610 Assembler::vpmullw(xmm0, xmm0, src, vector_len);
4611 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4612 }
4613 }
4614
4615 void MacroAssembler::vpsubb(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
4616 int dst_enc = dst->encoding();
4617 int nds_enc = nds->encoding();
4618 int src_enc = src->encoding();
4619 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4620 Assembler::vpsubb(dst, nds, src, vector_len);
4621 } else if ((dst_enc < 16) && (src_enc < 16)) {
4622 Assembler::vpsubb(dst, dst, src, vector_len);
4623 } else if ((dst_enc < 16) && (nds_enc < 16)) {
4624 // use nds as scratch for src
4625 evmovdqul(nds, src, Assembler::AVX_512bit);
4626 Assembler::vpsubb(dst, dst, nds, vector_len);
4627 } else if ((src_enc < 16) && (nds_enc < 16)) {
4628 // use nds as scratch for dst
4629 evmovdqul(nds, dst, Assembler::AVX_512bit);
4630 Assembler::vpsubb(nds, nds, src, vector_len);
4631 evmovdqul(dst, nds, Assembler::AVX_512bit);
4632 } else if (dst_enc < 16) {
4633 // use nds as scatch for xmm0 to hold src
4634 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4635 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4636 Assembler::vpsubb(dst, dst, xmm0, vector_len);
4637 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4638 } else {
4639 // worse case scenario, all regs are in the upper bank
4640 subptr(rsp, 64);
4641 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4642 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4643 evmovdqul(xmm1, src, Assembler::AVX_512bit);
4644 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4645 Assembler::vpsubb(xmm0, xmm0, xmm1, vector_len);
4646 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4647 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4648 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4649 addptr(rsp, 64);
4650 }
4651 }
4652
4653 void MacroAssembler::vpsubb(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
4654 int dst_enc = dst->encoding();
4655 int nds_enc = nds->encoding();
4656 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4657 Assembler::vpsubb(dst, nds, src, vector_len);
4658 } else if (dst_enc < 16) {
4659 Assembler::vpsubb(dst, dst, src, vector_len);
4660 } else if (nds_enc < 16) {
4661 // implies dst_enc in upper bank with src as scratch
4662 evmovdqul(nds, dst, Assembler::AVX_512bit);
4663 Assembler::vpsubb(nds, nds, src, vector_len);
4664 evmovdqul(dst, nds, Assembler::AVX_512bit);
4665 } else {
4666 // worse case scenario, all regs in upper bank
4667 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4668 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4669 Assembler::vpsubw(xmm0, xmm0, src, vector_len);
4670 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4671 }
4672 }
4673
4674 void MacroAssembler::vpsubw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
4675 int dst_enc = dst->encoding();
4676 int nds_enc = nds->encoding();
4677 int src_enc = src->encoding();
4678 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4679 Assembler::vpsubw(dst, nds, src, vector_len);
4680 } else if ((dst_enc < 16) && (src_enc < 16)) {
4681 Assembler::vpsubw(dst, dst, src, vector_len);
4682 } else if ((dst_enc < 16) && (nds_enc < 16)) {
4683 // use nds as scratch for src
4684 evmovdqul(nds, src, Assembler::AVX_512bit);
4685 Assembler::vpsubw(dst, dst, nds, vector_len);
4686 } else if ((src_enc < 16) && (nds_enc < 16)) {
4687 // use nds as scratch for dst
4688 evmovdqul(nds, dst, Assembler::AVX_512bit);
4689 Assembler::vpsubw(nds, nds, src, vector_len);
4690 evmovdqul(dst, nds, Assembler::AVX_512bit);
4691 } else if (dst_enc < 16) {
4692 // use nds as scatch for xmm0 to hold src
4693 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4694 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4695 Assembler::vpsubw(dst, dst, xmm0, vector_len);
4696 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4697 } else {
4698 // worse case scenario, all regs are in the upper bank
4699 subptr(rsp, 64);
4700 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4701 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4702 evmovdqul(xmm1, src, Assembler::AVX_512bit);
4703 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4704 Assembler::vpsubw(xmm0, xmm0, xmm1, vector_len);
4705 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4706 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4707 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4708 addptr(rsp, 64);
4709 }
4710 }
4711
4712 void MacroAssembler::vpsubw(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
4713 int dst_enc = dst->encoding();
4714 int nds_enc = nds->encoding();
4715 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4716 Assembler::vpsubw(dst, nds, src, vector_len);
4717 } else if (dst_enc < 16) {
4718 Assembler::vpsubw(dst, dst, src, vector_len);
4719 } else if (nds_enc < 16) {
4720 // implies dst_enc in upper bank with src as scratch
4721 evmovdqul(nds, dst, Assembler::AVX_512bit);
4722 Assembler::vpsubw(nds, nds, src, vector_len);
4723 evmovdqul(dst, nds, Assembler::AVX_512bit);
4724 } else {
4725 // worse case scenario, all regs in upper bank
4726 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4727 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4728 Assembler::vpsubw(xmm0, xmm0, src, vector_len);
4729 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4730 }
4731 }
4732
4733 void MacroAssembler::vpsraw(XMMRegister dst, XMMRegister nds, XMMRegister shift, int vector_len) {
4734 int dst_enc = dst->encoding();
4735 int nds_enc = nds->encoding();
4736 int shift_enc = shift->encoding();
4737 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4738 Assembler::vpsraw(dst, nds, shift, vector_len);
4739 } else if ((dst_enc < 16) && (shift_enc < 16)) {
4740 Assembler::vpsraw(dst, dst, shift, vector_len);
4741 } else if ((dst_enc < 16) && (nds_enc < 16)) {
4742 // use nds_enc as scratch with shift
4743 evmovdqul(nds, shift, Assembler::AVX_512bit);
4744 Assembler::vpsraw(dst, dst, nds, vector_len);
4745 } else if ((shift_enc < 16) && (nds_enc < 16)) {
4746 // use nds as scratch with dst
4747 evmovdqul(nds, dst, Assembler::AVX_512bit);
4748 Assembler::vpsraw(nds, nds, shift, vector_len);
4749 evmovdqul(dst, nds, Assembler::AVX_512bit);
4750 } else if (dst_enc < 16) {
4751 // use nds to save a copy of xmm0 and hold shift
4752 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4753 evmovdqul(xmm0, shift, Assembler::AVX_512bit);
4754 Assembler::vpsraw(dst, dst, xmm0, vector_len);
4755 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4756 } else if (nds_enc < 16) {
4757 // use nds as dest as temps
4758 evmovdqul(nds, dst, Assembler::AVX_512bit);
4759 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4760 evmovdqul(xmm0, shift, Assembler::AVX_512bit);
4761 Assembler::vpsraw(nds, nds, xmm0, vector_len);
4762 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4763 evmovdqul(dst, nds, Assembler::AVX_512bit);
4764 } else {
4765 // worse case scenario, all regs are in the upper bank
4766 subptr(rsp, 64);
4767 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4768 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4769 evmovdqul(xmm1, shift, Assembler::AVX_512bit);
4770 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4771 Assembler::vpsllw(xmm0, xmm0, xmm1, vector_len);
4772 evmovdqul(xmm1, dst, Assembler::AVX_512bit);
4773 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4774 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4775 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4776 addptr(rsp, 64);
4777 }
4778 }
4779
4780 void MacroAssembler::vpsraw(XMMRegister dst, XMMRegister nds, int shift, int vector_len) {
4781 int dst_enc = dst->encoding();
4782 int nds_enc = nds->encoding();
4783 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4784 Assembler::vpsraw(dst, nds, shift, vector_len);
4785 } else if (dst_enc < 16) {
4786 Assembler::vpsraw(dst, dst, shift, vector_len);
4787 } else if (nds_enc < 16) {
4788 // use nds as scratch
4789 evmovdqul(nds, dst, Assembler::AVX_512bit);
4790 Assembler::vpsraw(nds, nds, shift, vector_len);
4791 evmovdqul(dst, nds, Assembler::AVX_512bit);
4792 } else {
4793 // use nds as scratch for xmm0
4794 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4795 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4796 Assembler::vpsraw(xmm0, xmm0, shift, vector_len);
4797 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4798 }
4799 }
4800
4801 void MacroAssembler::vpsrlw(XMMRegister dst, XMMRegister nds, XMMRegister shift, int vector_len) {
4802 int dst_enc = dst->encoding();
4803 int nds_enc = nds->encoding();
4804 int shift_enc = shift->encoding();
4805 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4806 Assembler::vpsrlw(dst, nds, shift, vector_len);
4807 } else if ((dst_enc < 16) && (shift_enc < 16)) {
4808 Assembler::vpsrlw(dst, dst, shift, vector_len);
4809 } else if ((dst_enc < 16) && (nds_enc < 16)) {
4810 // use nds_enc as scratch with shift
4811 evmovdqul(nds, shift, Assembler::AVX_512bit);
4812 Assembler::vpsrlw(dst, dst, nds, vector_len);
4813 } else if ((shift_enc < 16) && (nds_enc < 16)) {
4814 // use nds as scratch with dst
4815 evmovdqul(nds, dst, Assembler::AVX_512bit);
4816 Assembler::vpsrlw(nds, nds, shift, vector_len);
4817 evmovdqul(dst, nds, Assembler::AVX_512bit);
4818 } else if (dst_enc < 16) {
4819 // use nds to save a copy of xmm0 and hold shift
4820 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4821 evmovdqul(xmm0, shift, Assembler::AVX_512bit);
4822 Assembler::vpsrlw(dst, dst, xmm0, vector_len);
4823 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4824 } else if (nds_enc < 16) {
4825 // use nds as dest as temps
4826 evmovdqul(nds, dst, Assembler::AVX_512bit);
4827 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4828 evmovdqul(xmm0, shift, Assembler::AVX_512bit);
4829 Assembler::vpsrlw(nds, nds, xmm0, vector_len);
4830 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4831 evmovdqul(dst, nds, Assembler::AVX_512bit);
4832 } else {
4833 // worse case scenario, all regs are in the upper bank
4834 subptr(rsp, 64);
4835 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4836 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4837 evmovdqul(xmm1, shift, Assembler::AVX_512bit);
4838 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4839 Assembler::vpsllw(xmm0, xmm0, xmm1, vector_len);
4840 evmovdqul(xmm1, dst, Assembler::AVX_512bit);
4841 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4842 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4843 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4844 addptr(rsp, 64);
4845 }
4846 }
4847
4848 void MacroAssembler::vpsrlw(XMMRegister dst, XMMRegister nds, int shift, int vector_len) {
4849 int dst_enc = dst->encoding();
4850 int nds_enc = nds->encoding();
4851 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4852 Assembler::vpsrlw(dst, nds, shift, vector_len);
4853 } else if (dst_enc < 16) {
4854 Assembler::vpsrlw(dst, dst, shift, vector_len);
4855 } else if (nds_enc < 16) {
4856 // use nds as scratch
4857 evmovdqul(nds, dst, Assembler::AVX_512bit);
4858 Assembler::vpsrlw(nds, nds, shift, vector_len);
4859 evmovdqul(dst, nds, Assembler::AVX_512bit);
4860 } else {
4861 // use nds as scratch for xmm0
4862 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4863 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4864 Assembler::vpsrlw(xmm0, xmm0, shift, vector_len);
4865 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4866 }
4867 }
4868
4869 void MacroAssembler::vpsllw(XMMRegister dst, XMMRegister nds, XMMRegister shift, int vector_len) {
4870 int dst_enc = dst->encoding();
4871 int nds_enc = nds->encoding();
4872 int shift_enc = shift->encoding();
4873 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4874 Assembler::vpsllw(dst, nds, shift, vector_len);
4875 } else if ((dst_enc < 16) && (shift_enc < 16)) {
4876 Assembler::vpsllw(dst, dst, shift, vector_len);
4877 } else if ((dst_enc < 16) && (nds_enc < 16)) {
4878 // use nds_enc as scratch with shift
4879 evmovdqul(nds, shift, Assembler::AVX_512bit);
4880 Assembler::vpsllw(dst, dst, nds, vector_len);
4881 } else if ((shift_enc < 16) && (nds_enc < 16)) {
4882 // use nds as scratch with dst
4883 evmovdqul(nds, dst, Assembler::AVX_512bit);
4884 Assembler::vpsllw(nds, nds, shift, vector_len);
4885 evmovdqul(dst, nds, Assembler::AVX_512bit);
4886 } else if (dst_enc < 16) {
4887 // use nds to save a copy of xmm0 and hold shift
4888 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4889 evmovdqul(xmm0, shift, Assembler::AVX_512bit);
4890 Assembler::vpsllw(dst, dst, xmm0, vector_len);
4891 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4892 } else if (nds_enc < 16) {
4893 // use nds as dest as temps
4894 evmovdqul(nds, dst, Assembler::AVX_512bit);
4895 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4896 evmovdqul(xmm0, shift, Assembler::AVX_512bit);
4897 Assembler::vpsllw(nds, nds, xmm0, vector_len);
4898 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4899 evmovdqul(dst, nds, Assembler::AVX_512bit);
4900 } else {
4901 // worse case scenario, all regs are in the upper bank
4902 subptr(rsp, 64);
4903 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4904 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4905 evmovdqul(xmm1, shift, Assembler::AVX_512bit);
4906 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4907 Assembler::vpsllw(xmm0, xmm0, xmm1, vector_len);
4908 evmovdqul(xmm1, dst, Assembler::AVX_512bit);
4909 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4910 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4911 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4912 addptr(rsp, 64);
4913 }
4914 }
4915
4916 void MacroAssembler::vpsllw(XMMRegister dst, XMMRegister nds, int shift, int vector_len) {
4917 int dst_enc = dst->encoding();
4918 int nds_enc = nds->encoding();
4919 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) {
4920 Assembler::vpsllw(dst, nds, shift, vector_len);
4921 } else if (dst_enc < 16) {
4922 Assembler::vpsllw(dst, dst, shift, vector_len);
4923 } else if (nds_enc < 16) {
4924 // use nds as scratch
4925 evmovdqul(nds, dst, Assembler::AVX_512bit);
4926 Assembler::vpsllw(nds, nds, shift, vector_len);
4927 evmovdqul(dst, nds, Assembler::AVX_512bit);
4928 } else {
4929 // use nds as scratch for xmm0
4930 evmovdqul(nds, xmm0, Assembler::AVX_512bit);
4931 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4932 Assembler::vpsllw(xmm0, xmm0, shift, vector_len);
4933 evmovdqul(xmm0, nds, Assembler::AVX_512bit);
4934 }
4935 }
4936
4937 void MacroAssembler::vptest(XMMRegister dst, XMMRegister src) {
4938 int dst_enc = dst->encoding();
4939 int src_enc = src->encoding();
4940 if ((dst_enc < 16) && (src_enc < 16)) {
4941 Assembler::vptest(dst, src);
4942 } else if (src_enc < 16) {
4943 subptr(rsp, 64);
4944 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4945 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4946 Assembler::vptest(xmm0, src);
4947 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4948 addptr(rsp, 64);
4949 } else if (dst_enc < 16) {
4950 subptr(rsp, 64);
4951 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4952 evmovdqul(xmm0, src, Assembler::AVX_512bit);
4953 Assembler::vptest(dst, xmm0);
4954 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4955 addptr(rsp, 64);
4956 } else {
4957 subptr(rsp, 64);
4958 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4959 subptr(rsp, 64);
4960 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
4961 movdqu(xmm0, src);
4962 movdqu(xmm1, dst);
4963 Assembler::vptest(xmm1, xmm0);
4964 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
4965 addptr(rsp, 64);
4966 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4967 addptr(rsp, 64);
4968 }
4969 }
4970
4971 // This instruction exists within macros, ergo we cannot control its input
4972 // when emitted through those patterns.
4973 void MacroAssembler::punpcklbw(XMMRegister dst, XMMRegister src) {
4974 if (VM_Version::supports_avx512nobw()) {
4975 int dst_enc = dst->encoding();
4976 int src_enc = src->encoding();
4977 if (dst_enc == src_enc) {
4978 if (dst_enc < 16) {
4979 Assembler::punpcklbw(dst, src);
4980 } else {
4981 subptr(rsp, 64);
4982 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4983 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4984 Assembler::punpcklbw(xmm0, xmm0);
4985 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4986 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4987 addptr(rsp, 64);
4988 }
4989 } else {
4990 if ((src_enc < 16) && (dst_enc < 16)) {
4991 Assembler::punpcklbw(dst, src);
4992 } else if (src_enc < 16) {
4993 subptr(rsp, 64);
4994 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
4995 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
4996 Assembler::punpcklbw(xmm0, src);
4997 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
4998 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
4999 addptr(rsp, 64);
5000 } else if (dst_enc < 16) {
5001 subptr(rsp, 64);
5002 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
5003 evmovdqul(xmm0, src, Assembler::AVX_512bit);
5004 Assembler::punpcklbw(dst, xmm0);
5005 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
5006 addptr(rsp, 64);
5007 } else {
5008 subptr(rsp, 64);
5009 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
5010 subptr(rsp, 64);
5011 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
5012 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
5013 evmovdqul(xmm1, src, Assembler::AVX_512bit);
5014 Assembler::punpcklbw(xmm0, xmm1);
5015 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
5016 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
5017 addptr(rsp, 64);
5018 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
5019 addptr(rsp, 64);
5020 }
5021 }
5022 } else {
5023 Assembler::punpcklbw(dst, src);
5024 }
5025 }
5026
5027 void MacroAssembler::pshufd(XMMRegister dst, Address src, int mode) {
5028 if (VM_Version::supports_avx512vl()) {
5029 Assembler::pshufd(dst, src, mode);
5030 } else {
5031 int dst_enc = dst->encoding();
5032 if (dst_enc < 16) {
5033 Assembler::pshufd(dst, src, mode);
5034 } else {
5035 subptr(rsp, 64);
5036 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
5037 Assembler::pshufd(xmm0, src, mode);
5038 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
5039 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
5040 addptr(rsp, 64);
5041 }
5042 }
5043 }
5044
5045 // This instruction exists within macros, ergo we cannot control its input
5046 // when emitted through those patterns.
5047 void MacroAssembler::pshuflw(XMMRegister dst, XMMRegister src, int mode) {
5048 if (VM_Version::supports_avx512nobw()) {
5049 int dst_enc = dst->encoding();
5050 int src_enc = src->encoding();
5051 if (dst_enc == src_enc) {
5052 if (dst_enc < 16) {
5053 Assembler::pshuflw(dst, src, mode);
5054 } else {
5055 subptr(rsp, 64);
5056 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
5057 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
5058 Assembler::pshuflw(xmm0, xmm0, mode);
5059 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
5060 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
5061 addptr(rsp, 64);
5062 }
5063 } else {
5064 if ((src_enc < 16) && (dst_enc < 16)) {
5065 Assembler::pshuflw(dst, src, mode);
5066 } else if (src_enc < 16) {
5067 subptr(rsp, 64);
5068 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
5069 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
5070 Assembler::pshuflw(xmm0, src, mode);
5071 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
5072 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
5073 addptr(rsp, 64);
5074 } else if (dst_enc < 16) {
5075 subptr(rsp, 64);
5076 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
5077 evmovdqul(xmm0, src, Assembler::AVX_512bit);
5078 Assembler::pshuflw(dst, xmm0, mode);
5079 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
5080 addptr(rsp, 64);
5081 } else {
5082 subptr(rsp, 64);
5083 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
5084 subptr(rsp, 64);
5085 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit);
5086 evmovdqul(xmm0, dst, Assembler::AVX_512bit);
5087 evmovdqul(xmm1, src, Assembler::AVX_512bit);
5088 Assembler::pshuflw(xmm0, xmm1, mode);
5089 evmovdqul(dst, xmm0, Assembler::AVX_512bit);
5090 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit);
5091 addptr(rsp, 64);
5092 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
5093 addptr(rsp, 64);
5094 }
5095 }
5096 } else {
5097 Assembler::pshuflw(dst, src, mode);
5098 }
5099 }
5100
5101 void MacroAssembler::vandpd(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len) {
5102 if (reachable(src)) {
5103 vandpd(dst, nds, as_Address(src), vector_len);
5104 } else {
5105 lea(rscratch1, src);
5106 vandpd(dst, nds, Address(rscratch1, 0), vector_len);
5107 }
5108 }
5109
5110 void MacroAssembler::vandps(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len) {
5111 if (reachable(src)) {
5112 vandps(dst, nds, as_Address(src), vector_len);
5113 } else {
5114 lea(rscratch1, src);
5115 vandps(dst, nds, Address(rscratch1, 0), vector_len);
5116 }
5117 }
5118
5119 void MacroAssembler::vdivsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
5120 if (reachable(src)) {
5121 vdivsd(dst, nds, as_Address(src));
5122 } else {
5123 lea(rscratch1, src);
5124 vdivsd(dst, nds, Address(rscratch1, 0));
5125 }
5126 }
5127
5128 void MacroAssembler::vdivss(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
5129 if (reachable(src)) {
5130 vdivss(dst, nds, as_Address(src));
5131 } else {
5132 lea(rscratch1, src);
5133 vdivss(dst, nds, Address(rscratch1, 0));
5134 }
5135 }
5136
5137 void MacroAssembler::vmulsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
5138 if (reachable(src)) {
5139 vmulsd(dst, nds, as_Address(src));
5140 } else {
5141 lea(rscratch1, src);
5142 vmulsd(dst, nds, Address(rscratch1, 0));
5143 }
5144 }
5145
5146 void MacroAssembler::vmulss(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
5147 if (reachable(src)) {
5148 vmulss(dst, nds, as_Address(src));
5149 } else {
5150 lea(rscratch1, src);
5151 vmulss(dst, nds, Address(rscratch1, 0));
5152 }
5153 }
5154
5155 void MacroAssembler::vsubsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
5156 if (reachable(src)) {
5157 vsubsd(dst, nds, as_Address(src));
5158 } else {
5159 lea(rscratch1, src);
5160 vsubsd(dst, nds, Address(rscratch1, 0));
5161 }
5162 }
5163
5164 void MacroAssembler::vsubss(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
5165 if (reachable(src)) {
5166 vsubss(dst, nds, as_Address(src));
5167 } else {
5168 lea(rscratch1, src);
5169 vsubss(dst, nds, Address(rscratch1, 0));
5170 }
5171 }
5172
5173 void MacroAssembler::vnegatess(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
5174 int nds_enc = nds->encoding();
5175 int dst_enc = dst->encoding();
5176 bool dst_upper_bank = (dst_enc > 15);
5177 bool nds_upper_bank = (nds_enc > 15);
5178 if (VM_Version::supports_avx512novl() &&
5179 (nds_upper_bank || dst_upper_bank)) {
5180 if (dst_upper_bank) {
5181 subptr(rsp, 64);
5182 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
5183 movflt(xmm0, nds);
5184 vxorps(xmm0, xmm0, src, Assembler::AVX_128bit);
5185 movflt(dst, xmm0);
5186 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
5187 addptr(rsp, 64);
5188 } else {
5189 movflt(dst, nds);
5190 vxorps(dst, dst, src, Assembler::AVX_128bit);
5191 }
5192 } else {
5193 vxorps(dst, nds, src, Assembler::AVX_128bit);
5194 }
5195 }
5196
5197 void MacroAssembler::vnegatesd(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
5198 int nds_enc = nds->encoding();
5199 int dst_enc = dst->encoding();
5200 bool dst_upper_bank = (dst_enc > 15);
5201 bool nds_upper_bank = (nds_enc > 15);
5202 if (VM_Version::supports_avx512novl() &&
5203 (nds_upper_bank || dst_upper_bank)) {
5204 if (dst_upper_bank) {
5205 subptr(rsp, 64);
5206 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit);
5207 movdbl(xmm0, nds);
5208 vxorpd(xmm0, xmm0, src, Assembler::AVX_128bit);
5209 movdbl(dst, xmm0);
5210 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit);
5211 addptr(rsp, 64);
5212 } else {
5213 movdbl(dst, nds);
5214 vxorpd(dst, dst, src, Assembler::AVX_128bit);
5215 }
5216 } else {
5217 vxorpd(dst, nds, src, Assembler::AVX_128bit);
5218 }
5219 }
5220
5221 void MacroAssembler::vxorpd(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len) {
5222 if (reachable(src)) {
5223 vxorpd(dst, nds, as_Address(src), vector_len);
5224 } else {
5225 lea(rscratch1, src);
5226 vxorpd(dst, nds, Address(rscratch1, 0), vector_len);
5227 }
5228 }
5229
5230 void MacroAssembler::vxorps(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len) {
5231 if (reachable(src)) {
5232 vxorps(dst, nds, as_Address(src), vector_len);
5233 } else {
5234 lea(rscratch1, src);
5235 vxorps(dst, nds, Address(rscratch1, 0), vector_len);
5236 }
5237 }
5238
5239 void MacroAssembler::clear_jweak_tag(Register possibly_jweak) {
5240 const int32_t inverted_jweak_mask = ~static_cast<int32_t>(JNIHandles::weak_tag_mask);
5241 STATIC_ASSERT(inverted_jweak_mask == -2); // otherwise check this code
5242 // The inverted mask is sign-extended
5243 andptr(possibly_jweak, inverted_jweak_mask);
5244 }
5245
5246 void MacroAssembler::resolve_jobject(Register value,
5247 Register thread,
5248 Register tmp) {
5249 assert_different_registers(value, thread, tmp);
5250 Label done, not_weak;
5251 testptr(value, value);
5252 jcc(Assembler::zero, done); // Use NULL as-is.
5253 testptr(value, JNIHandles::weak_tag_mask); // Test for jweak tag.
5254 jcc(Assembler::zero, not_weak);
5255 // Resolve jweak.
5256 access_load_at(T_OBJECT, IN_ROOT | ON_PHANTOM_OOP_REF,
5257 value, Address(value, -JNIHandles::weak_tag_value), tmp, thread);
5258 verify_oop(value);
5259 jmp(done);
5260 bind(not_weak);
5261 // Resolve (untagged) jobject.
5262 access_load_at(T_OBJECT, IN_ROOT | IN_CONCURRENT_ROOT,
5263 value, Address(value, 0), tmp, thread);
5264 verify_oop(value);
5265 bind(done);
5266 }
5267
5268 void MacroAssembler::subptr(Register dst, int32_t imm32) {
5269 LP64_ONLY(subq(dst, imm32)) NOT_LP64(subl(dst, imm32));
5270 }
5271
5272 // Force generation of a 4 byte immediate value even if it fits into 8bit
5273 void MacroAssembler::subptr_imm32(Register dst, int32_t imm32) {
5274 LP64_ONLY(subq_imm32(dst, imm32)) NOT_LP64(subl_imm32(dst, imm32));
5275 }
5276
5277 void MacroAssembler::subptr(Register dst, Register src) {
5278 LP64_ONLY(subq(dst, src)) NOT_LP64(subl(dst, src));
5279 }
5280
5281 // C++ bool manipulation
5282 void MacroAssembler::testbool(Register dst) {
5283 if(sizeof(bool) == 1)
5284 testb(dst, 0xff);
5285 else if(sizeof(bool) == 2) {
5286 // testw implementation needed for two byte bools
5287 ShouldNotReachHere();
5288 } else if(sizeof(bool) == 4)
5289 testl(dst, dst);
5290 else
5291 // unsupported
5292 ShouldNotReachHere();
5293 }
5294
5295 void MacroAssembler::testptr(Register dst, Register src) {
5296 LP64_ONLY(testq(dst, src)) NOT_LP64(testl(dst, src));
5297 }
5298
5299 // Defines obj, preserves var_size_in_bytes, okay for t2 == var_size_in_bytes.
5300 void MacroAssembler::tlab_allocate(Register obj,
5301 Register var_size_in_bytes,
5302 int con_size_in_bytes,
5303 Register t1,
5304 Register t2,
5305 Label& slow_case) {
5306 assert_different_registers(obj, t1, t2);
5307 assert_different_registers(obj, var_size_in_bytes, t1);
5308 Register end = t2;
5309 Register thread = NOT_LP64(t1) LP64_ONLY(r15_thread);
5310
5311 verify_tlab();
5312
5313 NOT_LP64(get_thread(thread));
5314
5315 movptr(obj, Address(thread, JavaThread::tlab_top_offset()));
5316 if (var_size_in_bytes == noreg) {
5317 lea(end, Address(obj, con_size_in_bytes));
5318 } else {
5319 lea(end, Address(obj, var_size_in_bytes, Address::times_1));
5320 }
5321 cmpptr(end, Address(thread, JavaThread::tlab_end_offset()));
5322 jcc(Assembler::above, slow_case);
5323
5324 // update the tlab top pointer
5325 movptr(Address(thread, JavaThread::tlab_top_offset()), end);
5326
5327 // recover var_size_in_bytes if necessary
5328 if (var_size_in_bytes == end) {
5329 subptr(var_size_in_bytes, obj);
5330 }
5331 verify_tlab();
5332 }
5333
5334 // Preserves the contents of address, destroys the contents length_in_bytes and temp.
5335 void MacroAssembler::zero_memory(Register address, Register length_in_bytes, int offset_in_bytes, Register temp) {
5336 assert(address != length_in_bytes && address != temp && temp != length_in_bytes, "registers must be different");
5337 assert((offset_in_bytes & (BytesPerWord - 1)) == 0, "offset must be a multiple of BytesPerWord");
5338 Label done;
5339
5340 testptr(length_in_bytes, length_in_bytes);
5341 jcc(Assembler::zero, done);
5342
5343 // initialize topmost word, divide index by 2, check if odd and test if zero
5344 // note: for the remaining code to work, index must be a multiple of BytesPerWord
5345 #ifdef ASSERT
5346 {
5347 Label L;
5348 testptr(length_in_bytes, BytesPerWord - 1);
5349 jcc(Assembler::zero, L);
5350 stop("length must be a multiple of BytesPerWord");
5351 bind(L);
5352 }
5353 #endif
5354 Register index = length_in_bytes;
5355 xorptr(temp, temp); // use _zero reg to clear memory (shorter code)
5356 if (UseIncDec) {
5357 shrptr(index, 3); // divide by 8/16 and set carry flag if bit 2 was set
5358 } else {
5359 shrptr(index, 2); // use 2 instructions to avoid partial flag stall
5360 shrptr(index, 1);
5361 }
5362 #ifndef _LP64
5363 // index could have not been a multiple of 8 (i.e., bit 2 was set)
5364 {
5365 Label even;
5366 // note: if index was a multiple of 8, then it cannot
5367 // be 0 now otherwise it must have been 0 before
5368 // => if it is even, we don't need to check for 0 again
5369 jcc(Assembler::carryClear, even);
5370 // clear topmost word (no jump would be needed if conditional assignment worked here)
5371 movptr(Address(address, index, Address::times_8, offset_in_bytes - 0*BytesPerWord), temp);
5372 // index could be 0 now, must check again
5373 jcc(Assembler::zero, done);
5374 bind(even);
5375 }
5376 #endif // !_LP64
5377 // initialize remaining object fields: index is a multiple of 2 now
5378 {
5379 Label loop;
5380 bind(loop);
5381 movptr(Address(address, index, Address::times_8, offset_in_bytes - 1*BytesPerWord), temp);
5382 NOT_LP64(movptr(Address(address, index, Address::times_8, offset_in_bytes - 2*BytesPerWord), temp);)
5383 decrement(index);
5384 jcc(Assembler::notZero, loop);
5385 }
5386
5387 bind(done);
5388 }
5389
5390 void MacroAssembler::incr_allocated_bytes(Register thread,
5391 Register var_size_in_bytes,
5392 int con_size_in_bytes,
5393 Register t1) {
5394 if (!thread->is_valid()) {
5395 #ifdef _LP64
5396 thread = r15_thread;
5397 #else
5398 assert(t1->is_valid(), "need temp reg");
5399 thread = t1;
5400 get_thread(thread);
5401 #endif
5402 }
5403
5404 #ifdef _LP64
5405 if (var_size_in_bytes->is_valid()) {
5406 addq(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), var_size_in_bytes);
5407 } else {
5408 addq(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), con_size_in_bytes);
5409 }
5410 #else
5411 if (var_size_in_bytes->is_valid()) {
5412 addl(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), var_size_in_bytes);
5413 } else {
5414 addl(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), con_size_in_bytes);
5415 }
5416 adcl(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())+4), 0);
5417 #endif
5418 }
5419
5420 // Look up the method for a megamorphic invokeinterface call.
5421 // The target method is determined by <intf_klass, itable_index>.
5422 // The receiver klass is in recv_klass.
5423 // On success, the result will be in method_result, and execution falls through.
5424 // On failure, execution transfers to the given label.
5425 void MacroAssembler::lookup_interface_method(Register recv_klass,
5426 Register intf_klass,
5427 RegisterOrConstant itable_index,
5428 Register method_result,
5429 Register scan_temp,
5430 Label& L_no_such_interface,
5431 bool return_method) {
5432 assert_different_registers(recv_klass, intf_klass, scan_temp);
5433 assert_different_registers(method_result, intf_klass, scan_temp);
5434 assert(recv_klass != method_result || !return_method,
5435 "recv_klass can be destroyed when method isn't needed");
5436
5437 assert(itable_index.is_constant() || itable_index.as_register() == method_result,
5438 "caller must use same register for non-constant itable index as for method");
5439
5440 // Compute start of first itableOffsetEntry (which is at the end of the vtable)
5441 int vtable_base = in_bytes(Klass::vtable_start_offset());
5442 int itentry_off = itableMethodEntry::method_offset_in_bytes();
5443 int scan_step = itableOffsetEntry::size() * wordSize;
5444 int vte_size = vtableEntry::size_in_bytes();
5445 Address::ScaleFactor times_vte_scale = Address::times_ptr;
5446 assert(vte_size == wordSize, "else adjust times_vte_scale");
5447
5448 movl(scan_temp, Address(recv_klass, Klass::vtable_length_offset()));
5449
5450 // %%% Could store the aligned, prescaled offset in the klassoop.
5451 lea(scan_temp, Address(recv_klass, scan_temp, times_vte_scale, vtable_base));
5452
5453 if (return_method) {
5454 // Adjust recv_klass by scaled itable_index, so we can free itable_index.
5455 assert(itableMethodEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
5456 lea(recv_klass, Address(recv_klass, itable_index, Address::times_ptr, itentry_off));
5457 }
5458
5459 // for (scan = klass->itable(); scan->interface() != NULL; scan += scan_step) {
5460 // if (scan->interface() == intf) {
5461 // result = (klass + scan->offset() + itable_index);
5462 // }
5463 // }
5464 Label search, found_method;
5465
5466 for (int peel = 1; peel >= 0; peel--) {
5467 movptr(method_result, Address(scan_temp, itableOffsetEntry::interface_offset_in_bytes()));
5468 cmpptr(intf_klass, method_result);
5469
5470 if (peel) {
5471 jccb(Assembler::equal, found_method);
5472 } else {
5473 jccb(Assembler::notEqual, search);
5474 // (invert the test to fall through to found_method...)
5475 }
5476
5477 if (!peel) break;
5478
5479 bind(search);
5480
5481 // Check that the previous entry is non-null. A null entry means that
5482 // the receiver class doesn't implement the interface, and wasn't the
5483 // same as when the caller was compiled.
5484 testptr(method_result, method_result);
5485 jcc(Assembler::zero, L_no_such_interface);
5486 addptr(scan_temp, scan_step);
5487 }
5488
5489 bind(found_method);
5490
5491 if (return_method) {
5492 // Got a hit.
5493 movl(scan_temp, Address(scan_temp, itableOffsetEntry::offset_offset_in_bytes()));
5494 movptr(method_result, Address(recv_klass, scan_temp, Address::times_1));
5495 }
5496 }
5497
5498
5499 // virtual method calling
5500 void MacroAssembler::lookup_virtual_method(Register recv_klass,
5501 RegisterOrConstant vtable_index,
5502 Register method_result) {
5503 const int base = in_bytes(Klass::vtable_start_offset());
5504 assert(vtableEntry::size() * wordSize == wordSize, "else adjust the scaling in the code below");
5505 Address vtable_entry_addr(recv_klass,
5506 vtable_index, Address::times_ptr,
5507 base + vtableEntry::method_offset_in_bytes());
5508 movptr(method_result, vtable_entry_addr);
5509 }
5510
5511
5512 void MacroAssembler::check_klass_subtype(Register sub_klass,
5513 Register super_klass,
5514 Register temp_reg,
5515 Label& L_success) {
5516 Label L_failure;
5517 check_klass_subtype_fast_path(sub_klass, super_klass, temp_reg, &L_success, &L_failure, NULL);
5518 check_klass_subtype_slow_path(sub_klass, super_klass, temp_reg, noreg, &L_success, NULL);
5519 bind(L_failure);
5520 }
5521
5522
5523 void MacroAssembler::check_klass_subtype_fast_path(Register sub_klass,
5524 Register super_klass,
5525 Register temp_reg,
5526 Label* L_success,
5527 Label* L_failure,
5528 Label* L_slow_path,
5529 RegisterOrConstant super_check_offset) {
5530 assert_different_registers(sub_klass, super_klass, temp_reg);
5531 bool must_load_sco = (super_check_offset.constant_or_zero() == -1);
5532 if (super_check_offset.is_register()) {
5533 assert_different_registers(sub_klass, super_klass,
5534 super_check_offset.as_register());
5535 } else if (must_load_sco) {
5536 assert(temp_reg != noreg, "supply either a temp or a register offset");
5537 }
5538
5539 Label L_fallthrough;
5540 int label_nulls = 0;
5541 if (L_success == NULL) { L_success = &L_fallthrough; label_nulls++; }
5542 if (L_failure == NULL) { L_failure = &L_fallthrough; label_nulls++; }
5543 if (L_slow_path == NULL) { L_slow_path = &L_fallthrough; label_nulls++; }
5544 assert(label_nulls <= 1, "at most one NULL in the batch");
5545
5546 int sc_offset = in_bytes(Klass::secondary_super_cache_offset());
5547 int sco_offset = in_bytes(Klass::super_check_offset_offset());
5548 Address super_check_offset_addr(super_klass, sco_offset);
5549
5550 // Hacked jcc, which "knows" that L_fallthrough, at least, is in
5551 // range of a jccb. If this routine grows larger, reconsider at
5552 // least some of these.
5553 #define local_jcc(assembler_cond, label) \
5554 if (&(label) == &L_fallthrough) jccb(assembler_cond, label); \
5555 else jcc( assembler_cond, label) /*omit semi*/
5556
5557 // Hacked jmp, which may only be used just before L_fallthrough.
5558 #define final_jmp(label) \
5559 if (&(label) == &L_fallthrough) { /*do nothing*/ } \
5560 else jmp(label) /*omit semi*/
5561
5562 // If the pointers are equal, we are done (e.g., String[] elements).
5563 // This self-check enables sharing of secondary supertype arrays among
5564 // non-primary types such as array-of-interface. Otherwise, each such
5565 // type would need its own customized SSA.
5566 // We move this check to the front of the fast path because many
5567 // type checks are in fact trivially successful in this manner,
5568 // so we get a nicely predicted branch right at the start of the check.
5569 cmpptr(sub_klass, super_klass);
5570 local_jcc(Assembler::equal, *L_success);
5571
5572 // Check the supertype display:
5573 if (must_load_sco) {
5574 // Positive movl does right thing on LP64.
5575 movl(temp_reg, super_check_offset_addr);
5576 super_check_offset = RegisterOrConstant(temp_reg);
5577 }
5578 Address super_check_addr(sub_klass, super_check_offset, Address::times_1, 0);
5579 cmpptr(super_klass, super_check_addr); // load displayed supertype
5580
5581 // This check has worked decisively for primary supers.
5582 // Secondary supers are sought in the super_cache ('super_cache_addr').
5583 // (Secondary supers are interfaces and very deeply nested subtypes.)
5584 // This works in the same check above because of a tricky aliasing
5585 // between the super_cache and the primary super display elements.
5586 // (The 'super_check_addr' can address either, as the case requires.)
5587 // Note that the cache is updated below if it does not help us find
5588 // what we need immediately.
5589 // So if it was a primary super, we can just fail immediately.
5590 // Otherwise, it's the slow path for us (no success at this point).
5591
5592 if (super_check_offset.is_register()) {
5593 local_jcc(Assembler::equal, *L_success);
5594 cmpl(super_check_offset.as_register(), sc_offset);
5595 if (L_failure == &L_fallthrough) {
5596 local_jcc(Assembler::equal, *L_slow_path);
5597 } else {
5598 local_jcc(Assembler::notEqual, *L_failure);
5599 final_jmp(*L_slow_path);
5600 }
5601 } else if (super_check_offset.as_constant() == sc_offset) {
5602 // Need a slow path; fast failure is impossible.
5603 if (L_slow_path == &L_fallthrough) {
5604 local_jcc(Assembler::equal, *L_success);
5605 } else {
5606 local_jcc(Assembler::notEqual, *L_slow_path);
5607 final_jmp(*L_success);
5608 }
5609 } else {
5610 // No slow path; it's a fast decision.
5611 if (L_failure == &L_fallthrough) {
5612 local_jcc(Assembler::equal, *L_success);
5613 } else {
5614 local_jcc(Assembler::notEqual, *L_failure);
5615 final_jmp(*L_success);
5616 }
5617 }
5618
5619 bind(L_fallthrough);
5620
5621 #undef local_jcc
5622 #undef final_jmp
5623 }
5624
5625
5626 void MacroAssembler::check_klass_subtype_slow_path(Register sub_klass,
5627 Register super_klass,
5628 Register temp_reg,
5629 Register temp2_reg,
5630 Label* L_success,
5631 Label* L_failure,
5632 bool set_cond_codes) {
5633 assert_different_registers(sub_klass, super_klass, temp_reg);
5634 if (temp2_reg != noreg)
5635 assert_different_registers(sub_klass, super_klass, temp_reg, temp2_reg);
5636 #define IS_A_TEMP(reg) ((reg) == temp_reg || (reg) == temp2_reg)
5637
5638 Label L_fallthrough;
5639 int label_nulls = 0;
5640 if (L_success == NULL) { L_success = &L_fallthrough; label_nulls++; }
5641 if (L_failure == NULL) { L_failure = &L_fallthrough; label_nulls++; }
5642 assert(label_nulls <= 1, "at most one NULL in the batch");
5643
5644 // a couple of useful fields in sub_klass:
5645 int ss_offset = in_bytes(Klass::secondary_supers_offset());
5646 int sc_offset = in_bytes(Klass::secondary_super_cache_offset());
5647 Address secondary_supers_addr(sub_klass, ss_offset);
5648 Address super_cache_addr( sub_klass, sc_offset);
5649
5650 // Do a linear scan of the secondary super-klass chain.
5651 // This code is rarely used, so simplicity is a virtue here.
5652 // The repne_scan instruction uses fixed registers, which we must spill.
5653 // Don't worry too much about pre-existing connections with the input regs.
5654
5655 assert(sub_klass != rax, "killed reg"); // killed by mov(rax, super)
5656 assert(sub_klass != rcx, "killed reg"); // killed by lea(rcx, &pst_counter)
5657
5658 // Get super_klass value into rax (even if it was in rdi or rcx).
5659 bool pushed_rax = false, pushed_rcx = false, pushed_rdi = false;
5660 if (super_klass != rax || UseCompressedOops) {
5661 if (!IS_A_TEMP(rax)) { push(rax); pushed_rax = true; }
5662 mov(rax, super_klass);
5663 }
5664 if (!IS_A_TEMP(rcx)) { push(rcx); pushed_rcx = true; }
5665 if (!IS_A_TEMP(rdi)) { push(rdi); pushed_rdi = true; }
5666
5667 #ifndef PRODUCT
5668 int* pst_counter = &SharedRuntime::_partial_subtype_ctr;
5669 ExternalAddress pst_counter_addr((address) pst_counter);
5670 NOT_LP64( incrementl(pst_counter_addr) );
5671 LP64_ONLY( lea(rcx, pst_counter_addr) );
5672 LP64_ONLY( incrementl(Address(rcx, 0)) );
5673 #endif //PRODUCT
5674
5675 // We will consult the secondary-super array.
5676 movptr(rdi, secondary_supers_addr);
5677 // Load the array length. (Positive movl does right thing on LP64.)
5678 movl(rcx, Address(rdi, Array<Klass*>::length_offset_in_bytes()));
5679 // Skip to start of data.
5680 addptr(rdi, Array<Klass*>::base_offset_in_bytes());
5681
5682 // Scan RCX words at [RDI] for an occurrence of RAX.
5683 // Set NZ/Z based on last compare.
5684 // Z flag value will not be set by 'repne' if RCX == 0 since 'repne' does
5685 // not change flags (only scas instruction which is repeated sets flags).
5686 // Set Z = 0 (not equal) before 'repne' to indicate that class was not found.
5687
5688 testptr(rax,rax); // Set Z = 0
5689 repne_scan();
5690
5691 // Unspill the temp. registers:
5692 if (pushed_rdi) pop(rdi);
5693 if (pushed_rcx) pop(rcx);
5694 if (pushed_rax) pop(rax);
5695
5696 if (set_cond_codes) {
5697 // Special hack for the AD files: rdi is guaranteed non-zero.
5698 assert(!pushed_rdi, "rdi must be left non-NULL");
5699 // Also, the condition codes are properly set Z/NZ on succeed/failure.
5700 }
5701
5702 if (L_failure == &L_fallthrough)
5703 jccb(Assembler::notEqual, *L_failure);
5704 else jcc(Assembler::notEqual, *L_failure);
5705
5706 // Success. Cache the super we found and proceed in triumph.
5707 movptr(super_cache_addr, super_klass);
5708
5709 if (L_success != &L_fallthrough) {
5710 jmp(*L_success);
5711 }
5712
5713 #undef IS_A_TEMP
5714
5715 bind(L_fallthrough);
5716 }
5717
5718
5719 void MacroAssembler::cmov32(Condition cc, Register dst, Address src) {
5720 if (VM_Version::supports_cmov()) {
5721 cmovl(cc, dst, src);
5722 } else {
5723 Label L;
5724 jccb(negate_condition(cc), L);
5725 movl(dst, src);
5726 bind(L);
5727 }
5728 }
5729
5730 void MacroAssembler::cmov32(Condition cc, Register dst, Register src) {
5731 if (VM_Version::supports_cmov()) {
5732 cmovl(cc, dst, src);
5733 } else {
5734 Label L;
5735 jccb(negate_condition(cc), L);
5736 movl(dst, src);
5737 bind(L);
5738 }
5739 }
5740
5741 void MacroAssembler::verify_oop(Register reg, const char* s) {
5742 if (!VerifyOops) return;
5743
5744 // Pass register number to verify_oop_subroutine
5745 const char* b = NULL;
5746 {
5747 ResourceMark rm;
5748 stringStream ss;
5749 ss.print("verify_oop: %s: %s", reg->name(), s);
5750 b = code_string(ss.as_string());
5751 }
5752 BLOCK_COMMENT("verify_oop {");
5753 #ifdef _LP64
5754 push(rscratch1); // save r10, trashed by movptr()
5755 #endif
5756 push(rax); // save rax,
5757 push(reg); // pass register argument
5758 ExternalAddress buffer((address) b);
5759 // avoid using pushptr, as it modifies scratch registers
5760 // and our contract is not to modify anything
5761 movptr(rax, buffer.addr());
5762 push(rax);
5763 // call indirectly to solve generation ordering problem
5764 movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address()));
5765 call(rax);
5766 // Caller pops the arguments (oop, message) and restores rax, r10
5767 BLOCK_COMMENT("} verify_oop");
5768 }
5769
5770
5771 RegisterOrConstant MacroAssembler::delayed_value_impl(intptr_t* delayed_value_addr,
5772 Register tmp,
5773 int offset) {
5774 intptr_t value = *delayed_value_addr;
5775 if (value != 0)
5776 return RegisterOrConstant(value + offset);
5777
5778 // load indirectly to solve generation ordering problem
5779 movptr(tmp, ExternalAddress((address) delayed_value_addr));
5780
5781 #ifdef ASSERT
5782 { Label L;
5783 testptr(tmp, tmp);
5784 if (WizardMode) {
5785 const char* buf = NULL;
5786 {
5787 ResourceMark rm;
5788 stringStream ss;
5789 ss.print("DelayedValue=" INTPTR_FORMAT, delayed_value_addr[1]);
5790 buf = code_string(ss.as_string());
5791 }
5792 jcc(Assembler::notZero, L);
5793 STOP(buf);
5794 } else {
5795 jccb(Assembler::notZero, L);
5796 hlt();
5797 }
5798 bind(L);
5799 }
5800 #endif
5801
5802 if (offset != 0)
5803 addptr(tmp, offset);
5804
5805 return RegisterOrConstant(tmp);
5806 }
5807
5808
5809 Address MacroAssembler::argument_address(RegisterOrConstant arg_slot,
5810 int extra_slot_offset) {
5811 // cf. TemplateTable::prepare_invoke(), if (load_receiver).
5812 int stackElementSize = Interpreter::stackElementSize;
5813 int offset = Interpreter::expr_offset_in_bytes(extra_slot_offset+0);
5814 #ifdef ASSERT
5815 int offset1 = Interpreter::expr_offset_in_bytes(extra_slot_offset+1);
5816 assert(offset1 - offset == stackElementSize, "correct arithmetic");
5817 #endif
5818 Register scale_reg = noreg;
5819 Address::ScaleFactor scale_factor = Address::no_scale;
5820 if (arg_slot.is_constant()) {
5821 offset += arg_slot.as_constant() * stackElementSize;
5822 } else {
5823 scale_reg = arg_slot.as_register();
5824 scale_factor = Address::times(stackElementSize);
5825 }
5826 offset += wordSize; // return PC is on stack
5827 return Address(rsp, scale_reg, scale_factor, offset);
5828 }
5829
5830
5831 void MacroAssembler::verify_oop_addr(Address addr, const char* s) {
5832 if (!VerifyOops) return;
5833
5834 // Address adjust(addr.base(), addr.index(), addr.scale(), addr.disp() + BytesPerWord);
5835 // Pass register number to verify_oop_subroutine
5836 const char* b = NULL;
5837 {
5838 ResourceMark rm;
5839 stringStream ss;
5840 ss.print("verify_oop_addr: %s", s);
5841 b = code_string(ss.as_string());
5842 }
5843 #ifdef _LP64
5844 push(rscratch1); // save r10, trashed by movptr()
5845 #endif
5846 push(rax); // save rax,
5847 // addr may contain rsp so we will have to adjust it based on the push
5848 // we just did (and on 64 bit we do two pushes)
5849 // NOTE: 64bit seemed to have had a bug in that it did movq(addr, rax); which
5850 // stores rax into addr which is backwards of what was intended.
5851 if (addr.uses(rsp)) {
5852 lea(rax, addr);
5853 pushptr(Address(rax, LP64_ONLY(2 *) BytesPerWord));
5854 } else {
5855 pushptr(addr);
5856 }
5857
5858 ExternalAddress buffer((address) b);
5859 // pass msg argument
5860 // avoid using pushptr, as it modifies scratch registers
5861 // and our contract is not to modify anything
5862 movptr(rax, buffer.addr());
5863 push(rax);
5864
5865 // call indirectly to solve generation ordering problem
5866 movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address()));
5867 call(rax);
5868 // Caller pops the arguments (addr, message) and restores rax, r10.
5869 }
5870
5871 void MacroAssembler::verify_tlab() {
5872 #ifdef ASSERT
5873 if (UseTLAB && VerifyOops) {
5874 Label next, ok;
5875 Register t1 = rsi;
5876 Register thread_reg = NOT_LP64(rbx) LP64_ONLY(r15_thread);
5877
5878 push(t1);
5879 NOT_LP64(push(thread_reg));
5880 NOT_LP64(get_thread(thread_reg));
5881
5882 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset())));
5883 cmpptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_start_offset())));
5884 jcc(Assembler::aboveEqual, next);
5885 STOP("assert(top >= start)");
5886 should_not_reach_here();
5887
5888 bind(next);
5889 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_end_offset())));
5890 cmpptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset())));
5891 jcc(Assembler::aboveEqual, ok);
5892 STOP("assert(top <= end)");
5893 should_not_reach_here();
5894
5895 bind(ok);
5896 NOT_LP64(pop(thread_reg));
5897 pop(t1);
5898 }
5899 #endif
5900 }
5901
5902 class ControlWord {
5903 public:
5904 int32_t _value;
5905
5906 int rounding_control() const { return (_value >> 10) & 3 ; }
5907 int precision_control() const { return (_value >> 8) & 3 ; }
5908 bool precision() const { return ((_value >> 5) & 1) != 0; }
5909 bool underflow() const { return ((_value >> 4) & 1) != 0; }
5910 bool overflow() const { return ((_value >> 3) & 1) != 0; }
5911 bool zero_divide() const { return ((_value >> 2) & 1) != 0; }
5912 bool denormalized() const { return ((_value >> 1) & 1) != 0; }
5913 bool invalid() const { return ((_value >> 0) & 1) != 0; }
5914
5915 void print() const {
5916 // rounding control
5917 const char* rc;
5918 switch (rounding_control()) {
5919 case 0: rc = "round near"; break;
5920 case 1: rc = "round down"; break;
5921 case 2: rc = "round up "; break;
5922 case 3: rc = "chop "; break;
5923 };
5924 // precision control
5925 const char* pc;
5926 switch (precision_control()) {
5927 case 0: pc = "24 bits "; break;
5928 case 1: pc = "reserved"; break;
5929 case 2: pc = "53 bits "; break;
5930 case 3: pc = "64 bits "; break;
5931 };
5932 // flags
5933 char f[9];
5934 f[0] = ' ';
5935 f[1] = ' ';
5936 f[2] = (precision ()) ? 'P' : 'p';
5937 f[3] = (underflow ()) ? 'U' : 'u';
5938 f[4] = (overflow ()) ? 'O' : 'o';
5939 f[5] = (zero_divide ()) ? 'Z' : 'z';
5940 f[6] = (denormalized()) ? 'D' : 'd';
5941 f[7] = (invalid ()) ? 'I' : 'i';
5942 f[8] = '\x0';
5943 // output
5944 printf("%04x masks = %s, %s, %s", _value & 0xFFFF, f, rc, pc);
5945 }
5946
5947 };
5948
5949 class StatusWord {
5950 public:
5951 int32_t _value;
5952
5953 bool busy() const { return ((_value >> 15) & 1) != 0; }
5954 bool C3() const { return ((_value >> 14) & 1) != 0; }
5955 bool C2() const { return ((_value >> 10) & 1) != 0; }
5956 bool C1() const { return ((_value >> 9) & 1) != 0; }
5957 bool C0() const { return ((_value >> 8) & 1) != 0; }
5958 int top() const { return (_value >> 11) & 7 ; }
5959 bool error_status() const { return ((_value >> 7) & 1) != 0; }
5960 bool stack_fault() const { return ((_value >> 6) & 1) != 0; }
5961 bool precision() const { return ((_value >> 5) & 1) != 0; }
5962 bool underflow() const { return ((_value >> 4) & 1) != 0; }
5963 bool overflow() const { return ((_value >> 3) & 1) != 0; }
5964 bool zero_divide() const { return ((_value >> 2) & 1) != 0; }
5965 bool denormalized() const { return ((_value >> 1) & 1) != 0; }
5966 bool invalid() const { return ((_value >> 0) & 1) != 0; }
5967
5968 void print() const {
5969 // condition codes
5970 char c[5];
5971 c[0] = (C3()) ? '3' : '-';
5972 c[1] = (C2()) ? '2' : '-';
5973 c[2] = (C1()) ? '1' : '-';
5974 c[3] = (C0()) ? '0' : '-';
5975 c[4] = '\x0';
5976 // flags
5977 char f[9];
5978 f[0] = (error_status()) ? 'E' : '-';
5979 f[1] = (stack_fault ()) ? 'S' : '-';
5980 f[2] = (precision ()) ? 'P' : '-';
5981 f[3] = (underflow ()) ? 'U' : '-';
5982 f[4] = (overflow ()) ? 'O' : '-';
5983 f[5] = (zero_divide ()) ? 'Z' : '-';
5984 f[6] = (denormalized()) ? 'D' : '-';
5985 f[7] = (invalid ()) ? 'I' : '-';
5986 f[8] = '\x0';
5987 // output
5988 printf("%04x flags = %s, cc = %s, top = %d", _value & 0xFFFF, f, c, top());
5989 }
5990
5991 };
5992
5993 class TagWord {
5994 public:
5995 int32_t _value;
5996
5997 int tag_at(int i) const { return (_value >> (i*2)) & 3; }
5998
5999 void print() const {
6000 printf("%04x", _value & 0xFFFF);
6001 }
6002
6003 };
6004
6005 class FPU_Register {
6006 public:
6007 int32_t _m0;
6008 int32_t _m1;
6009 int16_t _ex;
6010
6011 bool is_indefinite() const {
6012 return _ex == -1 && _m1 == (int32_t)0xC0000000 && _m0 == 0;
6013 }
6014
6015 void print() const {
6016 char sign = (_ex < 0) ? '-' : '+';
6017 const char* kind = (_ex == 0x7FFF || _ex == (int16_t)-1) ? "NaN" : " ";
6018 printf("%c%04hx.%08x%08x %s", sign, _ex, _m1, _m0, kind);
6019 };
6020
6021 };
6022
6023 class FPU_State {
6024 public:
6025 enum {
6026 register_size = 10,
6027 number_of_registers = 8,
6028 register_mask = 7
6029 };
6030
6031 ControlWord _control_word;
6032 StatusWord _status_word;
6033 TagWord _tag_word;
6034 int32_t _error_offset;
6035 int32_t _error_selector;
6036 int32_t _data_offset;
6037 int32_t _data_selector;
6038 int8_t _register[register_size * number_of_registers];
6039
6040 int tag_for_st(int i) const { return _tag_word.tag_at((_status_word.top() + i) & register_mask); }
6041 FPU_Register* st(int i) const { return (FPU_Register*)&_register[register_size * i]; }
6042
6043 const char* tag_as_string(int tag) const {
6044 switch (tag) {
6045 case 0: return "valid";
6046 case 1: return "zero";
6047 case 2: return "special";
6048 case 3: return "empty";
6049 }
6050 ShouldNotReachHere();
6051 return NULL;
6052 }
6053
6054 void print() const {
6055 // print computation registers
6056 { int t = _status_word.top();
6057 for (int i = 0; i < number_of_registers; i++) {
6058 int j = (i - t) & register_mask;
6059 printf("%c r%d = ST%d = ", (j == 0 ? '*' : ' '), i, j);
6060 st(j)->print();
6061 printf(" %s\n", tag_as_string(_tag_word.tag_at(i)));
6062 }
6063 }
6064 printf("\n");
6065 // print control registers
6066 printf("ctrl = "); _control_word.print(); printf("\n");
6067 printf("stat = "); _status_word .print(); printf("\n");
6068 printf("tags = "); _tag_word .print(); printf("\n");
6069 }
6070
6071 };
6072
6073 class Flag_Register {
6074 public:
6075 int32_t _value;
6076
6077 bool overflow() const { return ((_value >> 11) & 1) != 0; }
6078 bool direction() const { return ((_value >> 10) & 1) != 0; }
6079 bool sign() const { return ((_value >> 7) & 1) != 0; }
6080 bool zero() const { return ((_value >> 6) & 1) != 0; }
6081 bool auxiliary_carry() const { return ((_value >> 4) & 1) != 0; }
6082 bool parity() const { return ((_value >> 2) & 1) != 0; }
6083 bool carry() const { return ((_value >> 0) & 1) != 0; }
6084
6085 void print() const {
6086 // flags
6087 char f[8];
6088 f[0] = (overflow ()) ? 'O' : '-';
6089 f[1] = (direction ()) ? 'D' : '-';
6090 f[2] = (sign ()) ? 'S' : '-';
6091 f[3] = (zero ()) ? 'Z' : '-';
6092 f[4] = (auxiliary_carry()) ? 'A' : '-';
6093 f[5] = (parity ()) ? 'P' : '-';
6094 f[6] = (carry ()) ? 'C' : '-';
6095 f[7] = '\x0';
6096 // output
6097 printf("%08x flags = %s", _value, f);
6098 }
6099
6100 };
6101
6102 class IU_Register {
6103 public:
6104 int32_t _value;
6105
6106 void print() const {
6107 printf("%08x %11d", _value, _value);
6108 }
6109
6110 };
6111
6112 class IU_State {
6113 public:
6114 Flag_Register _eflags;
6115 IU_Register _rdi;
6116 IU_Register _rsi;
6117 IU_Register _rbp;
6118 IU_Register _rsp;
6119 IU_Register _rbx;
6120 IU_Register _rdx;
6121 IU_Register _rcx;
6122 IU_Register _rax;
6123
6124 void print() const {
6125 // computation registers
6126 printf("rax, = "); _rax.print(); printf("\n");
6127 printf("rbx, = "); _rbx.print(); printf("\n");
6128 printf("rcx = "); _rcx.print(); printf("\n");
6129 printf("rdx = "); _rdx.print(); printf("\n");
6130 printf("rdi = "); _rdi.print(); printf("\n");
6131 printf("rsi = "); _rsi.print(); printf("\n");
6132 printf("rbp, = "); _rbp.print(); printf("\n");
6133 printf("rsp = "); _rsp.print(); printf("\n");
6134 printf("\n");
6135 // control registers
6136 printf("flgs = "); _eflags.print(); printf("\n");
6137 }
6138 };
6139
6140
6141 class CPU_State {
6142 public:
6143 FPU_State _fpu_state;
6144 IU_State _iu_state;
6145
6146 void print() const {
6147 printf("--------------------------------------------------\n");
6148 _iu_state .print();
6149 printf("\n");
6150 _fpu_state.print();
6151 printf("--------------------------------------------------\n");
6152 }
6153
6154 };
6155
6156
6157 static void _print_CPU_state(CPU_State* state) {
6158 state->print();
6159 };
6160
6161
6162 void MacroAssembler::print_CPU_state() {
6163 push_CPU_state();
6164 push(rsp); // pass CPU state
6165 call(RuntimeAddress(CAST_FROM_FN_PTR(address, _print_CPU_state)));
6166 addptr(rsp, wordSize); // discard argument
6167 pop_CPU_state();
6168 }
6169
6170
6171 static bool _verify_FPU(int stack_depth, char* s, CPU_State* state) {
6172 static int counter = 0;
6173 FPU_State* fs = &state->_fpu_state;
6174 counter++;
6175 // For leaf calls, only verify that the top few elements remain empty.
6176 // We only need 1 empty at the top for C2 code.
6177 if( stack_depth < 0 ) {
6178 if( fs->tag_for_st(7) != 3 ) {
6179 printf("FPR7 not empty\n");
6180 state->print();
6181 assert(false, "error");
6182 return false;
6183 }
6184 return true; // All other stack states do not matter
6185 }
6186
6187 assert((fs->_control_word._value & 0xffff) == StubRoutines::_fpu_cntrl_wrd_std,
6188 "bad FPU control word");
6189
6190 // compute stack depth
6191 int i = 0;
6192 while (i < FPU_State::number_of_registers && fs->tag_for_st(i) < 3) i++;
6193 int d = i;
6194 while (i < FPU_State::number_of_registers && fs->tag_for_st(i) == 3) i++;
6195 // verify findings
6196 if (i != FPU_State::number_of_registers) {
6197 // stack not contiguous
6198 printf("%s: stack not contiguous at ST%d\n", s, i);
6199 state->print();
6200 assert(false, "error");
6201 return false;
6202 }
6203 // check if computed stack depth corresponds to expected stack depth
6204 if (stack_depth < 0) {
6205 // expected stack depth is -stack_depth or less
6206 if (d > -stack_depth) {
6207 // too many elements on the stack
6208 printf("%s: <= %d stack elements expected but found %d\n", s, -stack_depth, d);
6209 state->print();
6210 assert(false, "error");
6211 return false;
6212 }
6213 } else {
6214 // expected stack depth is stack_depth
6215 if (d != stack_depth) {
6216 // wrong stack depth
6217 printf("%s: %d stack elements expected but found %d\n", s, stack_depth, d);
6218 state->print();
6219 assert(false, "error");
6220 return false;
6221 }
6222 }
6223 // everything is cool
6224 return true;
6225 }
6226
6227
6228 void MacroAssembler::verify_FPU(int stack_depth, const char* s) {
6229 if (!VerifyFPU) return;
6230 push_CPU_state();
6231 push(rsp); // pass CPU state
6232 ExternalAddress msg((address) s);
6233 // pass message string s
6234 pushptr(msg.addr());
6235 push(stack_depth); // pass stack depth
6236 call(RuntimeAddress(CAST_FROM_FN_PTR(address, _verify_FPU)));
6237 addptr(rsp, 3 * wordSize); // discard arguments
6238 // check for error
6239 { Label L;
6240 testl(rax, rax);
6241 jcc(Assembler::notZero, L);
6242 int3(); // break if error condition
6243 bind(L);
6244 }
6245 pop_CPU_state();
6246 }
6247
6248 void MacroAssembler::restore_cpu_control_state_after_jni() {
6249 // Either restore the MXCSR register after returning from the JNI Call
6250 // or verify that it wasn't changed (with -Xcheck:jni flag).
6251 if (VM_Version::supports_sse()) {
6252 if (RestoreMXCSROnJNICalls) {
6253 ldmxcsr(ExternalAddress(StubRoutines::addr_mxcsr_std()));
6254 } else if (CheckJNICalls) {
6255 call(RuntimeAddress(StubRoutines::x86::verify_mxcsr_entry()));
6256 }
6257 }
6258 // Clear upper bits of YMM registers to avoid SSE <-> AVX transition penalty.
6259 vzeroupper();
6260 // Reset k1 to 0xffff.
6261 if (VM_Version::supports_evex()) {
6262 push(rcx);
6263 movl(rcx, 0xffff);
6264 kmovwl(k1, rcx);
6265 pop(rcx);
6266 }
6267
6268 #ifndef _LP64
6269 // Either restore the x87 floating pointer control word after returning
6270 // from the JNI call or verify that it wasn't changed.
6271 if (CheckJNICalls) {
6272 call(RuntimeAddress(StubRoutines::x86::verify_fpu_cntrl_wrd_entry()));
6273 }
6274 #endif // _LP64
6275 }
6276
6277 // ((OopHandle)result).resolve();
6278 void MacroAssembler::resolve_oop_handle(Register result, Register tmp) {
6279 // Only 64 bit platforms support GCs that require a tmp register
6280 // Only IN_HEAP loads require a thread_tmp register
6281 // OopHandle::resolve is an indirection like jobject.
6282 access_load_at(T_OBJECT, IN_ROOT | IN_CONCURRENT_ROOT,
6283 result, Address(result, 0), tmp, /*tmp_thread*/noreg);
6284 }
6285
6286 void MacroAssembler::load_mirror(Register mirror, Register method, Register tmp) {
6287 // get mirror
6288 const int mirror_offset = in_bytes(Klass::java_mirror_offset());
6289 movptr(mirror, Address(method, Method::const_offset()));
6290 movptr(mirror, Address(mirror, ConstMethod::constants_offset()));
6291 movptr(mirror, Address(mirror, ConstantPool::pool_holder_offset_in_bytes()));
6292 movptr(mirror, Address(mirror, mirror_offset));
6293 resolve_oop_handle(mirror, tmp);
6294 }
6295
6296 void MacroAssembler::load_klass(Register dst, Register src) {
6297 #ifdef _LP64
6298 if (UseCompressedClassPointers) {
6299 movl(dst, Address(src, oopDesc::klass_offset_in_bytes()));
6300 decode_klass_not_null(dst);
6301 } else
6302 #endif
6303 movptr(dst, Address(src, oopDesc::klass_offset_in_bytes()));
6304 }
6305
6306 void MacroAssembler::load_prototype_header(Register dst, Register src) {
6307 load_klass(dst, src);
6308 movptr(dst, Address(dst, Klass::prototype_header_offset()));
6309 }
6310
6311 void MacroAssembler::store_klass(Register dst, Register src) {
6312 #ifdef _LP64
6313 if (UseCompressedClassPointers) {
6314 encode_klass_not_null(src);
6315 movl(Address(dst, oopDesc::klass_offset_in_bytes()), src);
6316 } else
6317 #endif
6318 movptr(Address(dst, oopDesc::klass_offset_in_bytes()), src);
6319 }
6320
6321 void MacroAssembler::access_load_at(BasicType type, DecoratorSet decorators, Register dst, Address src,
6322 Register tmp1, Register thread_tmp) {
6323 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
6324 bool as_raw = (decorators & AS_RAW) != 0;
6325 if (as_raw) {
6326 bs->BarrierSetAssembler::load_at(this, decorators, type, dst, src, tmp1, thread_tmp);
6327 } else {
6328 bs->load_at(this, decorators, type, dst, src, tmp1, thread_tmp);
6329 }
6330 }
6331
6332 void MacroAssembler::access_store_at(BasicType type, DecoratorSet decorators, Address dst, Register src,
6333 Register tmp1, Register tmp2) {
6334 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
6335 bool as_raw = (decorators & AS_RAW) != 0;
6336 if (as_raw) {
6337 bs->BarrierSetAssembler::store_at(this, decorators, type, dst, src, tmp1, tmp2);
6338 } else {
6339 bs->store_at(this, decorators, type, dst, src, tmp1, tmp2);
6340 }
6341 }
6342
6343 void MacroAssembler::load_heap_oop(Register dst, Address src, Register tmp1,
6344 Register thread_tmp, DecoratorSet decorators) {
6345 access_load_at(T_OBJECT, IN_HEAP | decorators, dst, src, tmp1, thread_tmp);
6346 }
6347
6348 // Doesn't do verfication, generates fixed size code
6349 void MacroAssembler::load_heap_oop_not_null(Register dst, Address src, Register tmp1,
6350 Register thread_tmp, DecoratorSet decorators) {
6351 access_load_at(T_OBJECT, IN_HEAP | OOP_NOT_NULL | decorators, dst, src, tmp1, thread_tmp);
6352 }
6353
6354 void MacroAssembler::store_heap_oop(Address dst, Register src, Register tmp1,
6355 Register tmp2, DecoratorSet decorators) {
6356 access_store_at(T_OBJECT, IN_HEAP | decorators, dst, src, tmp1, tmp2);
6357 }
6358
6359 // Used for storing NULLs.
6360 void MacroAssembler::store_heap_oop_null(Address dst) {
6361 access_store_at(T_OBJECT, IN_HEAP, dst, noreg, noreg, noreg);
6362 }
6363
6364 #ifdef _LP64
6365 void MacroAssembler::store_klass_gap(Register dst, Register src) {
6366 if (UseCompressedClassPointers) {
6367 // Store to klass gap in destination
6368 movl(Address(dst, oopDesc::klass_gap_offset_in_bytes()), src);
6369 }
6370 }
6371
6372 #ifdef ASSERT
6373 void MacroAssembler::verify_heapbase(const char* msg) {
6374 assert (UseCompressedOops, "should be compressed");
6375 assert (Universe::heap() != NULL, "java heap should be initialized");
6376 if (CheckCompressedOops) {
6377 Label ok;
6378 push(rscratch1); // cmpptr trashes rscratch1
6379 cmpptr(r12_heapbase, ExternalAddress((address)Universe::narrow_ptrs_base_addr()));
6380 jcc(Assembler::equal, ok);
6381 STOP(msg);
6382 bind(ok);
6383 pop(rscratch1);
6384 }
6385 }
6386 #endif
6387
6388 // Algorithm must match oop.inline.hpp encode_heap_oop.
6389 void MacroAssembler::encode_heap_oop(Register r) {
6390 #ifdef ASSERT
6391 verify_heapbase("MacroAssembler::encode_heap_oop: heap base corrupted?");
6392 #endif
6393 verify_oop(r, "broken oop in encode_heap_oop");
6394 if (Universe::narrow_oop_base() == NULL) {
6395 if (Universe::narrow_oop_shift() != 0) {
6396 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong");
6397 shrq(r, LogMinObjAlignmentInBytes);
6398 }
6399 return;
6400 }
6401 testq(r, r);
6402 cmovq(Assembler::equal, r, r12_heapbase);
6403 subq(r, r12_heapbase);
6404 shrq(r, LogMinObjAlignmentInBytes);
6405 }
6406
6407 void MacroAssembler::encode_heap_oop_not_null(Register r) {
6408 #ifdef ASSERT
6409 verify_heapbase("MacroAssembler::encode_heap_oop_not_null: heap base corrupted?");
6410 if (CheckCompressedOops) {
6411 Label ok;
6412 testq(r, r);
6413 jcc(Assembler::notEqual, ok);
6414 STOP("null oop passed to encode_heap_oop_not_null");
6415 bind(ok);
6416 }
6417 #endif
6418 verify_oop(r, "broken oop in encode_heap_oop_not_null");
6419 if (Universe::narrow_oop_base() != NULL) {
6420 subq(r, r12_heapbase);
6421 }
6422 if (Universe::narrow_oop_shift() != 0) {
6423 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong");
6424 shrq(r, LogMinObjAlignmentInBytes);
6425 }
6426 }
6427
6428 void MacroAssembler::encode_heap_oop_not_null(Register dst, Register src) {
6429 #ifdef ASSERT
6430 verify_heapbase("MacroAssembler::encode_heap_oop_not_null2: heap base corrupted?");
6431 if (CheckCompressedOops) {
6432 Label ok;
6433 testq(src, src);
6434 jcc(Assembler::notEqual, ok);
6435 STOP("null oop passed to encode_heap_oop_not_null2");
6436 bind(ok);
6437 }
6438 #endif
6439 verify_oop(src, "broken oop in encode_heap_oop_not_null2");
6440 if (dst != src) {
6441 movq(dst, src);
6442 }
6443 if (Universe::narrow_oop_base() != NULL) {
6444 subq(dst, r12_heapbase);
6445 }
6446 if (Universe::narrow_oop_shift() != 0) {
6447 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong");
6448 shrq(dst, LogMinObjAlignmentInBytes);
6449 }
6450 }
6451
6452 void MacroAssembler::decode_heap_oop(Register r) {
6453 #ifdef ASSERT
6454 verify_heapbase("MacroAssembler::decode_heap_oop: heap base corrupted?");
6455 #endif
6456 if (Universe::narrow_oop_base() == NULL) {
6457 if (Universe::narrow_oop_shift() != 0) {
6458 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong");
6459 shlq(r, LogMinObjAlignmentInBytes);
6460 }
6461 } else {
6462 Label done;
6463 shlq(r, LogMinObjAlignmentInBytes);
6464 jccb(Assembler::equal, done);
6465 addq(r, r12_heapbase);
6466 bind(done);
6467 }
6468 verify_oop(r, "broken oop in decode_heap_oop");
6469 }
6470
6471 void MacroAssembler::decode_heap_oop_not_null(Register r) {
6472 // Note: it will change flags
6473 assert (UseCompressedOops, "should only be used for compressed headers");
6474 assert (Universe::heap() != NULL, "java heap should be initialized");
6475 // Cannot assert, unverified entry point counts instructions (see .ad file)
6476 // vtableStubs also counts instructions in pd_code_size_limit.
6477 // Also do not verify_oop as this is called by verify_oop.
6478 if (Universe::narrow_oop_shift() != 0) {
6479 assert(LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong");
6480 shlq(r, LogMinObjAlignmentInBytes);
6481 if (Universe::narrow_oop_base() != NULL) {
6482 addq(r, r12_heapbase);
6483 }
6484 } else {
6485 assert (Universe::narrow_oop_base() == NULL, "sanity");
6486 }
6487 }
6488
6489 void MacroAssembler::decode_heap_oop_not_null(Register dst, Register src) {
6490 // Note: it will change flags
6491 assert (UseCompressedOops, "should only be used for compressed headers");
6492 assert (Universe::heap() != NULL, "java heap should be initialized");
6493 // Cannot assert, unverified entry point counts instructions (see .ad file)
6494 // vtableStubs also counts instructions in pd_code_size_limit.
6495 // Also do not verify_oop as this is called by verify_oop.
6496 if (Universe::narrow_oop_shift() != 0) {
6497 assert(LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong");
6498 if (LogMinObjAlignmentInBytes == Address::times_8) {
6499 leaq(dst, Address(r12_heapbase, src, Address::times_8, 0));
6500 } else {
6501 if (dst != src) {
6502 movq(dst, src);
6503 }
6504 shlq(dst, LogMinObjAlignmentInBytes);
6505 if (Universe::narrow_oop_base() != NULL) {
6506 addq(dst, r12_heapbase);
6507 }
6508 }
6509 } else {
6510 assert (Universe::narrow_oop_base() == NULL, "sanity");
6511 if (dst != src) {
6512 movq(dst, src);
6513 }
6514 }
6515 }
6516
6517 void MacroAssembler::encode_klass_not_null(Register r) {
6518 if (Universe::narrow_klass_base() != NULL) {
6519 // Use r12 as a scratch register in which to temporarily load the narrow_klass_base.
6520 assert(r != r12_heapbase, "Encoding a klass in r12");
6521 mov64(r12_heapbase, (int64_t)Universe::narrow_klass_base());
6522 subq(r, r12_heapbase);
6523 }
6524 if (Universe::narrow_klass_shift() != 0) {
6525 assert (LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong");
6526 shrq(r, LogKlassAlignmentInBytes);
6527 }
6528 if (Universe::narrow_klass_base() != NULL) {
6529 reinit_heapbase();
6530 }
6531 }
6532
6533 void MacroAssembler::encode_klass_not_null(Register dst, Register src) {
6534 if (dst == src) {
6535 encode_klass_not_null(src);
6536 } else {
6537 if (Universe::narrow_klass_base() != NULL) {
6538 mov64(dst, (int64_t)Universe::narrow_klass_base());
6539 negq(dst);
6540 addq(dst, src);
6541 } else {
6542 movptr(dst, src);
6543 }
6544 if (Universe::narrow_klass_shift() != 0) {
6545 assert (LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong");
6546 shrq(dst, LogKlassAlignmentInBytes);
6547 }
6548 }
6549 }
6550
6551 // Function instr_size_for_decode_klass_not_null() counts the instructions
6552 // generated by decode_klass_not_null(register r) and reinit_heapbase(),
6553 // when (Universe::heap() != NULL). Hence, if the instructions they
6554 // generate change, then this method needs to be updated.
6555 int MacroAssembler::instr_size_for_decode_klass_not_null() {
6556 assert (UseCompressedClassPointers, "only for compressed klass ptrs");
6557 if (Universe::narrow_klass_base() != NULL) {
6558 // mov64 + addq + shlq? + mov64 (for reinit_heapbase()).
6559 return (Universe::narrow_klass_shift() == 0 ? 20 : 24);
6560 } else {
6561 // longest load decode klass function, mov64, leaq
6562 return 16;
6563 }
6564 }
6565
6566 // !!! If the instructions that get generated here change then function
6567 // instr_size_for_decode_klass_not_null() needs to get updated.
6568 void MacroAssembler::decode_klass_not_null(Register r) {
6569 // Note: it will change flags
6570 assert (UseCompressedClassPointers, "should only be used for compressed headers");
6571 assert(r != r12_heapbase, "Decoding a klass in r12");
6572 // Cannot assert, unverified entry point counts instructions (see .ad file)
6573 // vtableStubs also counts instructions in pd_code_size_limit.
6574 // Also do not verify_oop as this is called by verify_oop.
6575 if (Universe::narrow_klass_shift() != 0) {
6576 assert(LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong");
6577 shlq(r, LogKlassAlignmentInBytes);
6578 }
6579 // Use r12 as a scratch register in which to temporarily load the narrow_klass_base.
6580 if (Universe::narrow_klass_base() != NULL) {
6581 mov64(r12_heapbase, (int64_t)Universe::narrow_klass_base());
6582 addq(r, r12_heapbase);
6583 reinit_heapbase();
6584 }
6585 }
6586
6587 void MacroAssembler::decode_klass_not_null(Register dst, Register src) {
6588 // Note: it will change flags
6589 assert (UseCompressedClassPointers, "should only be used for compressed headers");
6590 if (dst == src) {
6591 decode_klass_not_null(dst);
6592 } else {
6593 // Cannot assert, unverified entry point counts instructions (see .ad file)
6594 // vtableStubs also counts instructions in pd_code_size_limit.
6595 // Also do not verify_oop as this is called by verify_oop.
6596 mov64(dst, (int64_t)Universe::narrow_klass_base());
6597 if (Universe::narrow_klass_shift() != 0) {
6598 assert(LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong");
6599 assert(LogKlassAlignmentInBytes == Address::times_8, "klass not aligned on 64bits?");
6600 leaq(dst, Address(dst, src, Address::times_8, 0));
6601 } else {
6602 addq(dst, src);
6603 }
6604 }
6605 }
6606
6607 void MacroAssembler::set_narrow_oop(Register dst, jobject obj) {
6608 assert (UseCompressedOops, "should only be used for compressed headers");
6609 assert (Universe::heap() != NULL, "java heap should be initialized");
6610 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder");
6611 int oop_index = oop_recorder()->find_index(obj);
6612 RelocationHolder rspec = oop_Relocation::spec(oop_index);
6613 mov_narrow_oop(dst, oop_index, rspec);
6614 }
6615
6616 void MacroAssembler::set_narrow_oop(Address dst, jobject obj) {
6617 assert (UseCompressedOops, "should only be used for compressed headers");
6618 assert (Universe::heap() != NULL, "java heap should be initialized");
6619 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder");
6620 int oop_index = oop_recorder()->find_index(obj);
6621 RelocationHolder rspec = oop_Relocation::spec(oop_index);
6622 mov_narrow_oop(dst, oop_index, rspec);
6623 }
6624
6625 void MacroAssembler::set_narrow_klass(Register dst, Klass* k) {
6626 assert (UseCompressedClassPointers, "should only be used for compressed headers");
6627 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder");
6628 int klass_index = oop_recorder()->find_index(k);
6629 RelocationHolder rspec = metadata_Relocation::spec(klass_index);
6630 mov_narrow_oop(dst, Klass::encode_klass(k), rspec);
6631 }
6632
6633 void MacroAssembler::set_narrow_klass(Address dst, Klass* k) {
6634 assert (UseCompressedClassPointers, "should only be used for compressed headers");
6635 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder");
6636 int klass_index = oop_recorder()->find_index(k);
6637 RelocationHolder rspec = metadata_Relocation::spec(klass_index);
6638 mov_narrow_oop(dst, Klass::encode_klass(k), rspec);
6639 }
6640
6641 void MacroAssembler::cmp_narrow_oop(Register dst, jobject obj) {
6642 assert (UseCompressedOops, "should only be used for compressed headers");
6643 assert (Universe::heap() != NULL, "java heap should be initialized");
6644 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder");
6645 int oop_index = oop_recorder()->find_index(obj);
6646 RelocationHolder rspec = oop_Relocation::spec(oop_index);
6647 Assembler::cmp_narrow_oop(dst, oop_index, rspec);
6648 }
6649
6650 void MacroAssembler::cmp_narrow_oop(Address dst, jobject obj) {
6651 assert (UseCompressedOops, "should only be used for compressed headers");
6652 assert (Universe::heap() != NULL, "java heap should be initialized");
6653 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder");
6654 int oop_index = oop_recorder()->find_index(obj);
6655 RelocationHolder rspec = oop_Relocation::spec(oop_index);
6656 Assembler::cmp_narrow_oop(dst, oop_index, rspec);
6657 }
6658
6659 void MacroAssembler::cmp_narrow_klass(Register dst, Klass* k) {
6660 assert (UseCompressedClassPointers, "should only be used for compressed headers");
6661 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder");
6662 int klass_index = oop_recorder()->find_index(k);
6663 RelocationHolder rspec = metadata_Relocation::spec(klass_index);
6664 Assembler::cmp_narrow_oop(dst, Klass::encode_klass(k), rspec);
6665 }
6666
6667 void MacroAssembler::cmp_narrow_klass(Address dst, Klass* k) {
6668 assert (UseCompressedClassPointers, "should only be used for compressed headers");
6669 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder");
6670 int klass_index = oop_recorder()->find_index(k);
6671 RelocationHolder rspec = metadata_Relocation::spec(klass_index);
6672 Assembler::cmp_narrow_oop(dst, Klass::encode_klass(k), rspec);
6673 }
6674
6675 void MacroAssembler::reinit_heapbase() {
6676 if (UseCompressedOops || UseCompressedClassPointers) {
6677 if (Universe::heap() != NULL) {
6678 if (Universe::narrow_oop_base() == NULL) {
6679 MacroAssembler::xorptr(r12_heapbase, r12_heapbase);
6680 } else {
6681 mov64(r12_heapbase, (int64_t)Universe::narrow_ptrs_base());
6682 }
6683 } else {
6684 movptr(r12_heapbase, ExternalAddress((address)Universe::narrow_ptrs_base_addr()));
6685 }
6686 }
6687 }
6688
6689 #endif // _LP64
6690
6691 // C2 compiled method's prolog code.
6692 void MacroAssembler::verified_entry(int framesize, int stack_bang_size, bool fp_mode_24b) {
6693
6694 // WARNING: Initial instruction MUST be 5 bytes or longer so that
6695 // NativeJump::patch_verified_entry will be able to patch out the entry
6696 // code safely. The push to verify stack depth is ok at 5 bytes,
6697 // the frame allocation can be either 3 or 6 bytes. So if we don't do
6698 // stack bang then we must use the 6 byte frame allocation even if
6699 // we have no frame. :-(
6700 assert(stack_bang_size >= framesize || stack_bang_size <= 0, "stack bang size incorrect");
6701
6702 assert((framesize & (StackAlignmentInBytes-1)) == 0, "frame size not aligned");
6703 // Remove word for return addr
6704 framesize -= wordSize;
6705 stack_bang_size -= wordSize;
6706
6707 // Calls to C2R adapters often do not accept exceptional returns.
6708 // We require that their callers must bang for them. But be careful, because
6709 // some VM calls (such as call site linkage) can use several kilobytes of
6710 // stack. But the stack safety zone should account for that.
6711 // See bugs 4446381, 4468289, 4497237.
6712 if (stack_bang_size > 0) {
6713 generate_stack_overflow_check(stack_bang_size);
6714
6715 // We always push rbp, so that on return to interpreter rbp, will be
6716 // restored correctly and we can correct the stack.
6717 push(rbp);
6718 // Save caller's stack pointer into RBP if the frame pointer is preserved.
6719 if (PreserveFramePointer) {
6720 mov(rbp, rsp);
6721 }
6722 // Remove word for ebp
6723 framesize -= wordSize;
6724
6725 // Create frame
6726 if (framesize) {
6727 subptr(rsp, framesize);
6728 }
6729 } else {
6730 // Create frame (force generation of a 4 byte immediate value)
6731 subptr_imm32(rsp, framesize);
6732
6733 // Save RBP register now.
6734 framesize -= wordSize;
6735 movptr(Address(rsp, framesize), rbp);
6736 // Save caller's stack pointer into RBP if the frame pointer is preserved.
6737 if (PreserveFramePointer) {
6738 movptr(rbp, rsp);
6739 if (framesize > 0) {
6740 addptr(rbp, framesize);
6741 }
6742 }
6743 }
6744
6745 if (VerifyStackAtCalls) { // Majik cookie to verify stack depth
6746 framesize -= wordSize;
6747 movptr(Address(rsp, framesize), (int32_t)0xbadb100d);
6748 }
6749
6750 #ifndef _LP64
6751 // If method sets FPU control word do it now
6752 if (fp_mode_24b) {
6753 fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_24()));
6754 }
6755 if (UseSSE >= 2 && VerifyFPU) {
6756 verify_FPU(0, "FPU stack must be clean on entry");
6757 }
6758 #endif
6759
6760 #ifdef ASSERT
6761 if (VerifyStackAtCalls) {
6762 Label L;
6763 push(rax);
6764 mov(rax, rsp);
6765 andptr(rax, StackAlignmentInBytes-1);
6766 cmpptr(rax, StackAlignmentInBytes-wordSize);
6767 pop(rax);
6768 jcc(Assembler::equal, L);
6769 STOP("Stack is not properly aligned!");
6770 bind(L);
6771 }
6772 #endif
6773
6774 }
6775
6776 void MacroAssembler::clear_mem(Register base, Register cnt, Register tmp, bool is_large) {
6777 // cnt - number of qwords (8-byte words).
6778 // base - start address, qword aligned.
6779 // is_large - if optimizers know cnt is larger than InitArrayShortSize
6780 assert(base==rdi, "base register must be edi for rep stos");
6781 assert(tmp==rax, "tmp register must be eax for rep stos");
6782 assert(cnt==rcx, "cnt register must be ecx for rep stos");
6783 assert(InitArrayShortSize % BytesPerLong == 0,
6784 "InitArrayShortSize should be the multiple of BytesPerLong");
6785
6786 Label DONE;
6787
6788 xorptr(tmp, tmp);
6789
6790 if (!is_large) {
6791 Label LOOP, LONG;
6792 cmpptr(cnt, InitArrayShortSize/BytesPerLong);
6793 jccb(Assembler::greater, LONG);
6794
6795 NOT_LP64(shlptr(cnt, 1);) // convert to number of 32-bit words for 32-bit VM
6796
6797 decrement(cnt);
6798 jccb(Assembler::negative, DONE); // Zero length
6799
6800 // Use individual pointer-sized stores for small counts:
6801 BIND(LOOP);
6802 movptr(Address(base, cnt, Address::times_ptr), tmp);
6803 decrement(cnt);
6804 jccb(Assembler::greaterEqual, LOOP);
6805 jmpb(DONE);
6806
6807 BIND(LONG);
6808 }
6809
6810 // Use longer rep-prefixed ops for non-small counts:
6811 if (UseFastStosb) {
6812 shlptr(cnt, 3); // convert to number of bytes
6813 rep_stosb();
6814 } else {
6815 NOT_LP64(shlptr(cnt, 1);) // convert to number of 32-bit words for 32-bit VM
6816 rep_stos();
6817 }
6818
6819 BIND(DONE);
6820 }
6821
6822 #ifdef COMPILER2
6823
6824 // IndexOf for constant substrings with size >= 8 chars
6825 // which don't need to be loaded through stack.
6826 void MacroAssembler::string_indexofC8(Register str1, Register str2,
6827 Register cnt1, Register cnt2,
6828 int int_cnt2, Register result,
6829 XMMRegister vec, Register tmp,
6830 int ae) {
6831 ShortBranchVerifier sbv(this);
6832 assert(UseSSE42Intrinsics, "SSE4.2 intrinsics are required");
6833 assert(ae != StrIntrinsicNode::LU, "Invalid encoding");
6834
6835 // This method uses the pcmpestri instruction with bound registers
6836 // inputs:
6837 // xmm - substring
6838 // rax - substring length (elements count)
6839 // mem - scanned string
6840 // rdx - string length (elements count)
6841 // 0xd - mode: 1100 (substring search) + 01 (unsigned shorts)
6842 // 0xc - mode: 1100 (substring search) + 00 (unsigned bytes)
6843 // outputs:
6844 // rcx - matched index in string
6845 assert(cnt1 == rdx && cnt2 == rax && tmp == rcx, "pcmpestri");
6846 int mode = (ae == StrIntrinsicNode::LL) ? 0x0c : 0x0d; // bytes or shorts
6847 int stride = (ae == StrIntrinsicNode::LL) ? 16 : 8; //UU, UL -> 8
6848 Address::ScaleFactor scale1 = (ae == StrIntrinsicNode::LL) ? Address::times_1 : Address::times_2;
6849 Address::ScaleFactor scale2 = (ae == StrIntrinsicNode::UL) ? Address::times_1 : scale1;
6850
6851 Label RELOAD_SUBSTR, SCAN_TO_SUBSTR, SCAN_SUBSTR,
6852 RET_FOUND, RET_NOT_FOUND, EXIT, FOUND_SUBSTR,
6853 MATCH_SUBSTR_HEAD, RELOAD_STR, FOUND_CANDIDATE;
6854
6855 // Note, inline_string_indexOf() generates checks:
6856 // if (substr.count > string.count) return -1;
6857 // if (substr.count == 0) return 0;
6858 assert(int_cnt2 >= stride, "this code is used only for cnt2 >= 8 chars");
6859
6860 // Load substring.
6861 if (ae == StrIntrinsicNode::UL) {
6862 pmovzxbw(vec, Address(str2, 0));
6863 } else {
6864 movdqu(vec, Address(str2, 0));
6865 }
6866 movl(cnt2, int_cnt2);
6867 movptr(result, str1); // string addr
6868
6869 if (int_cnt2 > stride) {
6870 jmpb(SCAN_TO_SUBSTR);
6871
6872 // Reload substr for rescan, this code
6873 // is executed only for large substrings (> 8 chars)
6874 bind(RELOAD_SUBSTR);
6875 if (ae == StrIntrinsicNode::UL) {
6876 pmovzxbw(vec, Address(str2, 0));
6877 } else {
6878 movdqu(vec, Address(str2, 0));
6879 }
6880 negptr(cnt2); // Jumped here with negative cnt2, convert to positive
6881
6882 bind(RELOAD_STR);
6883 // We came here after the beginning of the substring was
6884 // matched but the rest of it was not so we need to search
6885 // again. Start from the next element after the previous match.
6886
6887 // cnt2 is number of substring reminding elements and
6888 // cnt1 is number of string reminding elements when cmp failed.
6889 // Restored cnt1 = cnt1 - cnt2 + int_cnt2
6890 subl(cnt1, cnt2);
6891 addl(cnt1, int_cnt2);
6892 movl(cnt2, int_cnt2); // Now restore cnt2
6893
6894 decrementl(cnt1); // Shift to next element
6895 cmpl(cnt1, cnt2);
6896 jcc(Assembler::negative, RET_NOT_FOUND); // Left less then substring
6897
6898 addptr(result, (1<<scale1));
6899
6900 } // (int_cnt2 > 8)
6901
6902 // Scan string for start of substr in 16-byte vectors
6903 bind(SCAN_TO_SUBSTR);
6904 pcmpestri(vec, Address(result, 0), mode);
6905 jccb(Assembler::below, FOUND_CANDIDATE); // CF == 1
6906 subl(cnt1, stride);
6907 jccb(Assembler::lessEqual, RET_NOT_FOUND); // Scanned full string
6908 cmpl(cnt1, cnt2);
6909 jccb(Assembler::negative, RET_NOT_FOUND); // Left less then substring
6910 addptr(result, 16);
6911 jmpb(SCAN_TO_SUBSTR);
6912
6913 // Found a potential substr
6914 bind(FOUND_CANDIDATE);
6915 // Matched whole vector if first element matched (tmp(rcx) == 0).
6916 if (int_cnt2 == stride) {
6917 jccb(Assembler::overflow, RET_FOUND); // OF == 1
6918 } else { // int_cnt2 > 8
6919 jccb(Assembler::overflow, FOUND_SUBSTR);
6920 }
6921 // After pcmpestri tmp(rcx) contains matched element index
6922 // Compute start addr of substr
6923 lea(result, Address(result, tmp, scale1));
6924
6925 // Make sure string is still long enough
6926 subl(cnt1, tmp);
6927 cmpl(cnt1, cnt2);
6928 if (int_cnt2 == stride) {
6929 jccb(Assembler::greaterEqual, SCAN_TO_SUBSTR);
6930 } else { // int_cnt2 > 8
6931 jccb(Assembler::greaterEqual, MATCH_SUBSTR_HEAD);
6932 }
6933 // Left less then substring.
6934
6935 bind(RET_NOT_FOUND);
6936 movl(result, -1);
6937 jmp(EXIT);
6938
6939 if (int_cnt2 > stride) {
6940 // This code is optimized for the case when whole substring
6941 // is matched if its head is matched.
6942 bind(MATCH_SUBSTR_HEAD);
6943 pcmpestri(vec, Address(result, 0), mode);
6944 // Reload only string if does not match
6945 jcc(Assembler::noOverflow, RELOAD_STR); // OF == 0
6946
6947 Label CONT_SCAN_SUBSTR;
6948 // Compare the rest of substring (> 8 chars).
6949 bind(FOUND_SUBSTR);
6950 // First 8 chars are already matched.
6951 negptr(cnt2);
6952 addptr(cnt2, stride);
6953
6954 bind(SCAN_SUBSTR);
6955 subl(cnt1, stride);
6956 cmpl(cnt2, -stride); // Do not read beyond substring
6957 jccb(Assembler::lessEqual, CONT_SCAN_SUBSTR);
6958 // Back-up strings to avoid reading beyond substring:
6959 // cnt1 = cnt1 - cnt2 + 8
6960 addl(cnt1, cnt2); // cnt2 is negative
6961 addl(cnt1, stride);
6962 movl(cnt2, stride); negptr(cnt2);
6963 bind(CONT_SCAN_SUBSTR);
6964 if (int_cnt2 < (int)G) {
6965 int tail_off1 = int_cnt2<<scale1;
6966 int tail_off2 = int_cnt2<<scale2;
6967 if (ae == StrIntrinsicNode::UL) {
6968 pmovzxbw(vec, Address(str2, cnt2, scale2, tail_off2));
6969 } else {
6970 movdqu(vec, Address(str2, cnt2, scale2, tail_off2));
6971 }
6972 pcmpestri(vec, Address(result, cnt2, scale1, tail_off1), mode);
6973 } else {
6974 // calculate index in register to avoid integer overflow (int_cnt2*2)
6975 movl(tmp, int_cnt2);
6976 addptr(tmp, cnt2);
6977 if (ae == StrIntrinsicNode::UL) {
6978 pmovzxbw(vec, Address(str2, tmp, scale2, 0));
6979 } else {
6980 movdqu(vec, Address(str2, tmp, scale2, 0));
6981 }
6982 pcmpestri(vec, Address(result, tmp, scale1, 0), mode);
6983 }
6984 // Need to reload strings pointers if not matched whole vector
6985 jcc(Assembler::noOverflow, RELOAD_SUBSTR); // OF == 0
6986 addptr(cnt2, stride);
6987 jcc(Assembler::negative, SCAN_SUBSTR);
6988 // Fall through if found full substring
6989
6990 } // (int_cnt2 > 8)
6991
6992 bind(RET_FOUND);
6993 // Found result if we matched full small substring.
6994 // Compute substr offset
6995 subptr(result, str1);
6996 if (ae == StrIntrinsicNode::UU || ae == StrIntrinsicNode::UL) {
6997 shrl(result, 1); // index
6998 }
6999 bind(EXIT);
7000
7001 } // string_indexofC8
7002
7003 // Small strings are loaded through stack if they cross page boundary.
7004 void MacroAssembler::string_indexof(Register str1, Register str2,
7005 Register cnt1, Register cnt2,
7006 int int_cnt2, Register result,
7007 XMMRegister vec, Register tmp,
7008 int ae) {
7009 ShortBranchVerifier sbv(this);
7010 assert(UseSSE42Intrinsics, "SSE4.2 intrinsics are required");
7011 assert(ae != StrIntrinsicNode::LU, "Invalid encoding");
7012
7013 //
7014 // int_cnt2 is length of small (< 8 chars) constant substring
7015 // or (-1) for non constant substring in which case its length
7016 // is in cnt2 register.
7017 //
7018 // Note, inline_string_indexOf() generates checks:
7019 // if (substr.count > string.count) return -1;
7020 // if (substr.count == 0) return 0;
7021 //
7022 int stride = (ae == StrIntrinsicNode::LL) ? 16 : 8; //UU, UL -> 8
7023 assert(int_cnt2 == -1 || (0 < int_cnt2 && int_cnt2 < stride), "should be != 0");
7024 // This method uses the pcmpestri instruction with bound registers
7025 // inputs:
7026 // xmm - substring
7027 // rax - substring length (elements count)
7028 // mem - scanned string
7029 // rdx - string length (elements count)
7030 // 0xd - mode: 1100 (substring search) + 01 (unsigned shorts)
7031 // 0xc - mode: 1100 (substring search) + 00 (unsigned bytes)
7032 // outputs:
7033 // rcx - matched index in string
7034 assert(cnt1 == rdx && cnt2 == rax && tmp == rcx, "pcmpestri");
7035 int mode = (ae == StrIntrinsicNode::LL) ? 0x0c : 0x0d; // bytes or shorts
7036 Address::ScaleFactor scale1 = (ae == StrIntrinsicNode::LL) ? Address::times_1 : Address::times_2;
7037 Address::ScaleFactor scale2 = (ae == StrIntrinsicNode::UL) ? Address::times_1 : scale1;
7038
7039 Label RELOAD_SUBSTR, SCAN_TO_SUBSTR, SCAN_SUBSTR, ADJUST_STR,
7040 RET_FOUND, RET_NOT_FOUND, CLEANUP, FOUND_SUBSTR,
7041 FOUND_CANDIDATE;
7042
7043 { //========================================================
7044 // We don't know where these strings are located
7045 // and we can't read beyond them. Load them through stack.
7046 Label BIG_STRINGS, CHECK_STR, COPY_SUBSTR, COPY_STR;
7047
7048 movptr(tmp, rsp); // save old SP
7049
7050 if (int_cnt2 > 0) { // small (< 8 chars) constant substring
7051 if (int_cnt2 == (1>>scale2)) { // One byte
7052 assert((ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UL), "Only possible for latin1 encoding");
7053 load_unsigned_byte(result, Address(str2, 0));
7054 movdl(vec, result); // move 32 bits
7055 } else if (ae == StrIntrinsicNode::LL && int_cnt2 == 3) { // Three bytes
7056 // Not enough header space in 32-bit VM: 12+3 = 15.
7057 movl(result, Address(str2, -1));
7058 shrl(result, 8);
7059 movdl(vec, result); // move 32 bits
7060 } else if (ae != StrIntrinsicNode::UL && int_cnt2 == (2>>scale2)) { // One char
7061 load_unsigned_short(result, Address(str2, 0));
7062 movdl(vec, result); // move 32 bits
7063 } else if (ae != StrIntrinsicNode::UL && int_cnt2 == (4>>scale2)) { // Two chars
7064 movdl(vec, Address(str2, 0)); // move 32 bits
7065 } else if (ae != StrIntrinsicNode::UL && int_cnt2 == (8>>scale2)) { // Four chars
7066 movq(vec, Address(str2, 0)); // move 64 bits
7067 } else { // cnt2 = { 3, 5, 6, 7 } || (ae == StrIntrinsicNode::UL && cnt2 ={2, ..., 7})
7068 // Array header size is 12 bytes in 32-bit VM
7069 // + 6 bytes for 3 chars == 18 bytes,
7070 // enough space to load vec and shift.
7071 assert(HeapWordSize*TypeArrayKlass::header_size() >= 12,"sanity");
7072 if (ae == StrIntrinsicNode::UL) {
7073 int tail_off = int_cnt2-8;
7074 pmovzxbw(vec, Address(str2, tail_off));
7075 psrldq(vec, -2*tail_off);
7076 }
7077 else {
7078 int tail_off = int_cnt2*(1<<scale2);
7079 movdqu(vec, Address(str2, tail_off-16));
7080 psrldq(vec, 16-tail_off);
7081 }
7082 }
7083 } else { // not constant substring
7084 cmpl(cnt2, stride);
7085 jccb(Assembler::aboveEqual, BIG_STRINGS); // Both strings are big enough
7086
7087 // We can read beyond string if srt+16 does not cross page boundary
7088 // since heaps are aligned and mapped by pages.
7089 assert(os::vm_page_size() < (int)G, "default page should be small");
7090 movl(result, str2); // We need only low 32 bits
7091 andl(result, (os::vm_page_size()-1));
7092 cmpl(result, (os::vm_page_size()-16));
7093 jccb(Assembler::belowEqual, CHECK_STR);
7094
7095 // Move small strings to stack to allow load 16 bytes into vec.
7096 subptr(rsp, 16);
7097 int stk_offset = wordSize-(1<<scale2);
7098 push(cnt2);
7099
7100 bind(COPY_SUBSTR);
7101 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UL) {
7102 load_unsigned_byte(result, Address(str2, cnt2, scale2, -1));
7103 movb(Address(rsp, cnt2, scale2, stk_offset), result);
7104 } else if (ae == StrIntrinsicNode::UU) {
7105 load_unsigned_short(result, Address(str2, cnt2, scale2, -2));
7106 movw(Address(rsp, cnt2, scale2, stk_offset), result);
7107 }
7108 decrement(cnt2);
7109 jccb(Assembler::notZero, COPY_SUBSTR);
7110
7111 pop(cnt2);
7112 movptr(str2, rsp); // New substring address
7113 } // non constant
7114
7115 bind(CHECK_STR);
7116 cmpl(cnt1, stride);
7117 jccb(Assembler::aboveEqual, BIG_STRINGS);
7118
7119 // Check cross page boundary.
7120 movl(result, str1); // We need only low 32 bits
7121 andl(result, (os::vm_page_size()-1));
7122 cmpl(result, (os::vm_page_size()-16));
7123 jccb(Assembler::belowEqual, BIG_STRINGS);
7124
7125 subptr(rsp, 16);
7126 int stk_offset = -(1<<scale1);
7127 if (int_cnt2 < 0) { // not constant
7128 push(cnt2);
7129 stk_offset += wordSize;
7130 }
7131 movl(cnt2, cnt1);
7132
7133 bind(COPY_STR);
7134 if (ae == StrIntrinsicNode::LL) {
7135 load_unsigned_byte(result, Address(str1, cnt2, scale1, -1));
7136 movb(Address(rsp, cnt2, scale1, stk_offset), result);
7137 } else {
7138 load_unsigned_short(result, Address(str1, cnt2, scale1, -2));
7139 movw(Address(rsp, cnt2, scale1, stk_offset), result);
7140 }
7141 decrement(cnt2);
7142 jccb(Assembler::notZero, COPY_STR);
7143
7144 if (int_cnt2 < 0) { // not constant
7145 pop(cnt2);
7146 }
7147 movptr(str1, rsp); // New string address
7148
7149 bind(BIG_STRINGS);
7150 // Load substring.
7151 if (int_cnt2 < 0) { // -1
7152 if (ae == StrIntrinsicNode::UL) {
7153 pmovzxbw(vec, Address(str2, 0));
7154 } else {
7155 movdqu(vec, Address(str2, 0));
7156 }
7157 push(cnt2); // substr count
7158 push(str2); // substr addr
7159 push(str1); // string addr
7160 } else {
7161 // Small (< 8 chars) constant substrings are loaded already.
7162 movl(cnt2, int_cnt2);
7163 }
7164 push(tmp); // original SP
7165
7166 } // Finished loading
7167
7168 //========================================================
7169 // Start search
7170 //
7171
7172 movptr(result, str1); // string addr
7173
7174 if (int_cnt2 < 0) { // Only for non constant substring
7175 jmpb(SCAN_TO_SUBSTR);
7176
7177 // SP saved at sp+0
7178 // String saved at sp+1*wordSize
7179 // Substr saved at sp+2*wordSize
7180 // Substr count saved at sp+3*wordSize
7181
7182 // Reload substr for rescan, this code
7183 // is executed only for large substrings (> 8 chars)
7184 bind(RELOAD_SUBSTR);
7185 movptr(str2, Address(rsp, 2*wordSize));
7186 movl(cnt2, Address(rsp, 3*wordSize));
7187 if (ae == StrIntrinsicNode::UL) {
7188 pmovzxbw(vec, Address(str2, 0));
7189 } else {
7190 movdqu(vec, Address(str2, 0));
7191 }
7192 // We came here after the beginning of the substring was
7193 // matched but the rest of it was not so we need to search
7194 // again. Start from the next element after the previous match.
7195 subptr(str1, result); // Restore counter
7196 if (ae == StrIntrinsicNode::UU || ae == StrIntrinsicNode::UL) {
7197 shrl(str1, 1);
7198 }
7199 addl(cnt1, str1);
7200 decrementl(cnt1); // Shift to next element
7201 cmpl(cnt1, cnt2);
7202 jcc(Assembler::negative, RET_NOT_FOUND); // Left less then substring
7203
7204 addptr(result, (1<<scale1));
7205 } // non constant
7206
7207 // Scan string for start of substr in 16-byte vectors
7208 bind(SCAN_TO_SUBSTR);
7209 assert(cnt1 == rdx && cnt2 == rax && tmp == rcx, "pcmpestri");
7210 pcmpestri(vec, Address(result, 0), mode);
7211 jccb(Assembler::below, FOUND_CANDIDATE); // CF == 1
7212 subl(cnt1, stride);
7213 jccb(Assembler::lessEqual, RET_NOT_FOUND); // Scanned full string
7214 cmpl(cnt1, cnt2);
7215 jccb(Assembler::negative, RET_NOT_FOUND); // Left less then substring
7216 addptr(result, 16);
7217
7218 bind(ADJUST_STR);
7219 cmpl(cnt1, stride); // Do not read beyond string
7220 jccb(Assembler::greaterEqual, SCAN_TO_SUBSTR);
7221 // Back-up string to avoid reading beyond string.
7222 lea(result, Address(result, cnt1, scale1, -16));
7223 movl(cnt1, stride);
7224 jmpb(SCAN_TO_SUBSTR);
7225
7226 // Found a potential substr
7227 bind(FOUND_CANDIDATE);
7228 // After pcmpestri tmp(rcx) contains matched element index
7229
7230 // Make sure string is still long enough
7231 subl(cnt1, tmp);
7232 cmpl(cnt1, cnt2);
7233 jccb(Assembler::greaterEqual, FOUND_SUBSTR);
7234 // Left less then substring.
7235
7236 bind(RET_NOT_FOUND);
7237 movl(result, -1);
7238 jmpb(CLEANUP);
7239
7240 bind(FOUND_SUBSTR);
7241 // Compute start addr of substr
7242 lea(result, Address(result, tmp, scale1));
7243 if (int_cnt2 > 0) { // Constant substring
7244 // Repeat search for small substring (< 8 chars)
7245 // from new point without reloading substring.
7246 // Have to check that we don't read beyond string.
7247 cmpl(tmp, stride-int_cnt2);
7248 jccb(Assembler::greater, ADJUST_STR);
7249 // Fall through if matched whole substring.
7250 } else { // non constant
7251 assert(int_cnt2 == -1, "should be != 0");
7252
7253 addl(tmp, cnt2);
7254 // Found result if we matched whole substring.
7255 cmpl(tmp, stride);
7256 jccb(Assembler::lessEqual, RET_FOUND);
7257
7258 // Repeat search for small substring (<= 8 chars)
7259 // from new point 'str1' without reloading substring.
7260 cmpl(cnt2, stride);
7261 // Have to check that we don't read beyond string.
7262 jccb(Assembler::lessEqual, ADJUST_STR);
7263
7264 Label CHECK_NEXT, CONT_SCAN_SUBSTR, RET_FOUND_LONG;
7265 // Compare the rest of substring (> 8 chars).
7266 movptr(str1, result);
7267
7268 cmpl(tmp, cnt2);
7269 // First 8 chars are already matched.
7270 jccb(Assembler::equal, CHECK_NEXT);
7271
7272 bind(SCAN_SUBSTR);
7273 pcmpestri(vec, Address(str1, 0), mode);
7274 // Need to reload strings pointers if not matched whole vector
7275 jcc(Assembler::noOverflow, RELOAD_SUBSTR); // OF == 0
7276
7277 bind(CHECK_NEXT);
7278 subl(cnt2, stride);
7279 jccb(Assembler::lessEqual, RET_FOUND_LONG); // Found full substring
7280 addptr(str1, 16);
7281 if (ae == StrIntrinsicNode::UL) {
7282 addptr(str2, 8);
7283 } else {
7284 addptr(str2, 16);
7285 }
7286 subl(cnt1, stride);
7287 cmpl(cnt2, stride); // Do not read beyond substring
7288 jccb(Assembler::greaterEqual, CONT_SCAN_SUBSTR);
7289 // Back-up strings to avoid reading beyond substring.
7290
7291 if (ae == StrIntrinsicNode::UL) {
7292 lea(str2, Address(str2, cnt2, scale2, -8));
7293 lea(str1, Address(str1, cnt2, scale1, -16));
7294 } else {
7295 lea(str2, Address(str2, cnt2, scale2, -16));
7296 lea(str1, Address(str1, cnt2, scale1, -16));
7297 }
7298 subl(cnt1, cnt2);
7299 movl(cnt2, stride);
7300 addl(cnt1, stride);
7301 bind(CONT_SCAN_SUBSTR);
7302 if (ae == StrIntrinsicNode::UL) {
7303 pmovzxbw(vec, Address(str2, 0));
7304 } else {
7305 movdqu(vec, Address(str2, 0));
7306 }
7307 jmp(SCAN_SUBSTR);
7308
7309 bind(RET_FOUND_LONG);
7310 movptr(str1, Address(rsp, wordSize));
7311 } // non constant
7312
7313 bind(RET_FOUND);
7314 // Compute substr offset
7315 subptr(result, str1);
7316 if (ae == StrIntrinsicNode::UU || ae == StrIntrinsicNode::UL) {
7317 shrl(result, 1); // index
7318 }
7319 bind(CLEANUP);
7320 pop(rsp); // restore SP
7321
7322 } // string_indexof
7323
7324 void MacroAssembler::string_indexof_char(Register str1, Register cnt1, Register ch, Register result,
7325 XMMRegister vec1, XMMRegister vec2, XMMRegister vec3, Register tmp) {
7326 ShortBranchVerifier sbv(this);
7327 assert(UseSSE42Intrinsics, "SSE4.2 intrinsics are required");
7328
7329 int stride = 8;
7330
7331 Label FOUND_CHAR, SCAN_TO_CHAR, SCAN_TO_CHAR_LOOP,
7332 SCAN_TO_8_CHAR, SCAN_TO_8_CHAR_LOOP, SCAN_TO_16_CHAR_LOOP,
7333 RET_NOT_FOUND, SCAN_TO_8_CHAR_INIT,
7334 FOUND_SEQ_CHAR, DONE_LABEL;
7335
7336 movptr(result, str1);
7337 if (UseAVX >= 2) {
7338 cmpl(cnt1, stride);
7339 jcc(Assembler::less, SCAN_TO_CHAR_LOOP);
7340 cmpl(cnt1, 2*stride);
7341 jcc(Assembler::less, SCAN_TO_8_CHAR_INIT);
7342 movdl(vec1, ch);
7343 vpbroadcastw(vec1, vec1);
7344 vpxor(vec2, vec2);
7345 movl(tmp, cnt1);
7346 andl(tmp, 0xFFFFFFF0); //vector count (in chars)
7347 andl(cnt1,0x0000000F); //tail count (in chars)
7348
7349 bind(SCAN_TO_16_CHAR_LOOP);
7350 vmovdqu(vec3, Address(result, 0));
7351 vpcmpeqw(vec3, vec3, vec1, 1);
7352 vptest(vec2, vec3);
7353 jcc(Assembler::carryClear, FOUND_CHAR);
7354 addptr(result, 32);
7355 subl(tmp, 2*stride);
7356 jccb(Assembler::notZero, SCAN_TO_16_CHAR_LOOP);
7357 jmp(SCAN_TO_8_CHAR);
7358 bind(SCAN_TO_8_CHAR_INIT);
7359 movdl(vec1, ch);
7360 pshuflw(vec1, vec1, 0x00);
7361 pshufd(vec1, vec1, 0);
7362 pxor(vec2, vec2);
7363 }
7364 bind(SCAN_TO_8_CHAR);
7365 cmpl(cnt1, stride);
7366 if (UseAVX >= 2) {
7367 jcc(Assembler::less, SCAN_TO_CHAR);
7368 } else {
7369 jcc(Assembler::less, SCAN_TO_CHAR_LOOP);
7370 movdl(vec1, ch);
7371 pshuflw(vec1, vec1, 0x00);
7372 pshufd(vec1, vec1, 0);
7373 pxor(vec2, vec2);
7374 }
7375 movl(tmp, cnt1);
7376 andl(tmp, 0xFFFFFFF8); //vector count (in chars)
7377 andl(cnt1,0x00000007); //tail count (in chars)
7378
7379 bind(SCAN_TO_8_CHAR_LOOP);
7380 movdqu(vec3, Address(result, 0));
7381 pcmpeqw(vec3, vec1);
7382 ptest(vec2, vec3);
7383 jcc(Assembler::carryClear, FOUND_CHAR);
7384 addptr(result, 16);
7385 subl(tmp, stride);
7386 jccb(Assembler::notZero, SCAN_TO_8_CHAR_LOOP);
7387 bind(SCAN_TO_CHAR);
7388 testl(cnt1, cnt1);
7389 jcc(Assembler::zero, RET_NOT_FOUND);
7390 bind(SCAN_TO_CHAR_LOOP);
7391 load_unsigned_short(tmp, Address(result, 0));
7392 cmpl(ch, tmp);
7393 jccb(Assembler::equal, FOUND_SEQ_CHAR);
7394 addptr(result, 2);
7395 subl(cnt1, 1);
7396 jccb(Assembler::zero, RET_NOT_FOUND);
7397 jmp(SCAN_TO_CHAR_LOOP);
7398
7399 bind(RET_NOT_FOUND);
7400 movl(result, -1);
7401 jmpb(DONE_LABEL);
7402
7403 bind(FOUND_CHAR);
7404 if (UseAVX >= 2) {
7405 vpmovmskb(tmp, vec3);
7406 } else {
7407 pmovmskb(tmp, vec3);
7408 }
7409 bsfl(ch, tmp);
7410 addl(result, ch);
7411
7412 bind(FOUND_SEQ_CHAR);
7413 subptr(result, str1);
7414 shrl(result, 1);
7415
7416 bind(DONE_LABEL);
7417 } // string_indexof_char
7418
7419 // helper function for string_compare
7420 void MacroAssembler::load_next_elements(Register elem1, Register elem2, Register str1, Register str2,
7421 Address::ScaleFactor scale, Address::ScaleFactor scale1,
7422 Address::ScaleFactor scale2, Register index, int ae) {
7423 if (ae == StrIntrinsicNode::LL) {
7424 load_unsigned_byte(elem1, Address(str1, index, scale, 0));
7425 load_unsigned_byte(elem2, Address(str2, index, scale, 0));
7426 } else if (ae == StrIntrinsicNode::UU) {
7427 load_unsigned_short(elem1, Address(str1, index, scale, 0));
7428 load_unsigned_short(elem2, Address(str2, index, scale, 0));
7429 } else {
7430 load_unsigned_byte(elem1, Address(str1, index, scale1, 0));
7431 load_unsigned_short(elem2, Address(str2, index, scale2, 0));
7432 }
7433 }
7434
7435 // Compare strings, used for char[] and byte[].
7436 void MacroAssembler::string_compare(Register str1, Register str2,
7437 Register cnt1, Register cnt2, Register result,
7438 XMMRegister vec1, int ae) {
7439 ShortBranchVerifier sbv(this);
7440 Label LENGTH_DIFF_LABEL, POP_LABEL, DONE_LABEL, WHILE_HEAD_LABEL;
7441 Label COMPARE_WIDE_VECTORS_LOOP_FAILED; // used only _LP64 && AVX3
7442 int stride, stride2, adr_stride, adr_stride1, adr_stride2;
7443 int stride2x2 = 0x40;
7444 Address::ScaleFactor scale = Address::no_scale;
7445 Address::ScaleFactor scale1 = Address::no_scale;
7446 Address::ScaleFactor scale2 = Address::no_scale;
7447
7448 if (ae != StrIntrinsicNode::LL) {
7449 stride2x2 = 0x20;
7450 }
7451
7452 if (ae == StrIntrinsicNode::LU || ae == StrIntrinsicNode::UL) {
7453 shrl(cnt2, 1);
7454 }
7455 // Compute the minimum of the string lengths and the
7456 // difference of the string lengths (stack).
7457 // Do the conditional move stuff
7458 movl(result, cnt1);
7459 subl(cnt1, cnt2);
7460 push(cnt1);
7461 cmov32(Assembler::lessEqual, cnt2, result); // cnt2 = min(cnt1, cnt2)
7462
7463 // Is the minimum length zero?
7464 testl(cnt2, cnt2);
7465 jcc(Assembler::zero, LENGTH_DIFF_LABEL);
7466 if (ae == StrIntrinsicNode::LL) {
7467 // Load first bytes
7468 load_unsigned_byte(result, Address(str1, 0)); // result = str1[0]
7469 load_unsigned_byte(cnt1, Address(str2, 0)); // cnt1 = str2[0]
7470 } else if (ae == StrIntrinsicNode::UU) {
7471 // Load first characters
7472 load_unsigned_short(result, Address(str1, 0));
7473 load_unsigned_short(cnt1, Address(str2, 0));
7474 } else {
7475 load_unsigned_byte(result, Address(str1, 0));
7476 load_unsigned_short(cnt1, Address(str2, 0));
7477 }
7478 subl(result, cnt1);
7479 jcc(Assembler::notZero, POP_LABEL);
7480
7481 if (ae == StrIntrinsicNode::UU) {
7482 // Divide length by 2 to get number of chars
7483 shrl(cnt2, 1);
7484 }
7485 cmpl(cnt2, 1);
7486 jcc(Assembler::equal, LENGTH_DIFF_LABEL);
7487
7488 // Check if the strings start at the same location and setup scale and stride
7489 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
7490 cmpptr(str1, str2);
7491 jcc(Assembler::equal, LENGTH_DIFF_LABEL);
7492 if (ae == StrIntrinsicNode::LL) {
7493 scale = Address::times_1;
7494 stride = 16;
7495 } else {
7496 scale = Address::times_2;
7497 stride = 8;
7498 }
7499 } else {
7500 scale1 = Address::times_1;
7501 scale2 = Address::times_2;
7502 // scale not used
7503 stride = 8;
7504 }
7505
7506 if (UseAVX >= 2 && UseSSE42Intrinsics) {
7507 Label COMPARE_WIDE_VECTORS, VECTOR_NOT_EQUAL, COMPARE_WIDE_TAIL, COMPARE_SMALL_STR;
7508 Label COMPARE_WIDE_VECTORS_LOOP, COMPARE_16_CHARS, COMPARE_INDEX_CHAR;
7509 Label COMPARE_WIDE_VECTORS_LOOP_AVX2;
7510 Label COMPARE_TAIL_LONG;
7511 Label COMPARE_WIDE_VECTORS_LOOP_AVX3; // used only _LP64 && AVX3
7512
7513 int pcmpmask = 0x19;
7514 if (ae == StrIntrinsicNode::LL) {
7515 pcmpmask &= ~0x01;
7516 }
7517
7518 // Setup to compare 16-chars (32-bytes) vectors,
7519 // start from first character again because it has aligned address.
7520 if (ae == StrIntrinsicNode::LL) {
7521 stride2 = 32;
7522 } else {
7523 stride2 = 16;
7524 }
7525 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
7526 adr_stride = stride << scale;
7527 } else {
7528 adr_stride1 = 8; //stride << scale1;
7529 adr_stride2 = 16; //stride << scale2;
7530 }
7531
7532 assert(result == rax && cnt2 == rdx && cnt1 == rcx, "pcmpestri");
7533 // rax and rdx are used by pcmpestri as elements counters
7534 movl(result, cnt2);
7535 andl(cnt2, ~(stride2-1)); // cnt2 holds the vector count
7536 jcc(Assembler::zero, COMPARE_TAIL_LONG);
7537
7538 // fast path : compare first 2 8-char vectors.
7539 bind(COMPARE_16_CHARS);
7540 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
7541 movdqu(vec1, Address(str1, 0));
7542 } else {
7543 pmovzxbw(vec1, Address(str1, 0));
7544 }
7545 pcmpestri(vec1, Address(str2, 0), pcmpmask);
7546 jccb(Assembler::below, COMPARE_INDEX_CHAR);
7547
7548 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
7549 movdqu(vec1, Address(str1, adr_stride));
7550 pcmpestri(vec1, Address(str2, adr_stride), pcmpmask);
7551 } else {
7552 pmovzxbw(vec1, Address(str1, adr_stride1));
7553 pcmpestri(vec1, Address(str2, adr_stride2), pcmpmask);
7554 }
7555 jccb(Assembler::aboveEqual, COMPARE_WIDE_VECTORS);
7556 addl(cnt1, stride);
7557
7558 // Compare the characters at index in cnt1
7559 bind(COMPARE_INDEX_CHAR); // cnt1 has the offset of the mismatching character
7560 load_next_elements(result, cnt2, str1, str2, scale, scale1, scale2, cnt1, ae);
7561 subl(result, cnt2);
7562 jmp(POP_LABEL);
7563
7564 // Setup the registers to start vector comparison loop
7565 bind(COMPARE_WIDE_VECTORS);
7566 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
7567 lea(str1, Address(str1, result, scale));
7568 lea(str2, Address(str2, result, scale));
7569 } else {
7570 lea(str1, Address(str1, result, scale1));
7571 lea(str2, Address(str2, result, scale2));
7572 }
7573 subl(result, stride2);
7574 subl(cnt2, stride2);
7575 jcc(Assembler::zero, COMPARE_WIDE_TAIL);
7576 negptr(result);
7577
7578 // In a loop, compare 16-chars (32-bytes) at once using (vpxor+vptest)
7579 bind(COMPARE_WIDE_VECTORS_LOOP);
7580
7581 #ifdef _LP64
7582 if (VM_Version::supports_avx512vlbw()) { // trying 64 bytes fast loop
7583 cmpl(cnt2, stride2x2);
7584 jccb(Assembler::below, COMPARE_WIDE_VECTORS_LOOP_AVX2);
7585 testl(cnt2, stride2x2-1); // cnt2 holds the vector count
7586 jccb(Assembler::notZero, COMPARE_WIDE_VECTORS_LOOP_AVX2); // means we cannot subtract by 0x40
7587
7588 bind(COMPARE_WIDE_VECTORS_LOOP_AVX3); // the hottest loop
7589 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
7590 evmovdquq(vec1, Address(str1, result, scale), Assembler::AVX_512bit);
7591 evpcmpeqb(k7, vec1, Address(str2, result, scale), Assembler::AVX_512bit); // k7 == 11..11, if operands equal, otherwise k7 has some 0
7592 } else {
7593 vpmovzxbw(vec1, Address(str1, result, scale1), Assembler::AVX_512bit);
7594 evpcmpeqb(k7, vec1, Address(str2, result, scale2), Assembler::AVX_512bit); // k7 == 11..11, if operands equal, otherwise k7 has some 0
7595 }
7596 kortestql(k7, k7);
7597 jcc(Assembler::aboveEqual, COMPARE_WIDE_VECTORS_LOOP_FAILED); // miscompare
7598 addptr(result, stride2x2); // update since we already compared at this addr
7599 subl(cnt2, stride2x2); // and sub the size too
7600 jccb(Assembler::notZero, COMPARE_WIDE_VECTORS_LOOP_AVX3);
7601
7602 vpxor(vec1, vec1);
7603 jmpb(COMPARE_WIDE_TAIL);
7604 }//if (VM_Version::supports_avx512vlbw())
7605 #endif // _LP64
7606
7607
7608 bind(COMPARE_WIDE_VECTORS_LOOP_AVX2);
7609 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
7610 vmovdqu(vec1, Address(str1, result, scale));
7611 vpxor(vec1, Address(str2, result, scale));
7612 } else {
7613 vpmovzxbw(vec1, Address(str1, result, scale1), Assembler::AVX_256bit);
7614 vpxor(vec1, Address(str2, result, scale2));
7615 }
7616 vptest(vec1, vec1);
7617 jcc(Assembler::notZero, VECTOR_NOT_EQUAL);
7618 addptr(result, stride2);
7619 subl(cnt2, stride2);
7620 jcc(Assembler::notZero, COMPARE_WIDE_VECTORS_LOOP);
7621 // clean upper bits of YMM registers
7622 vpxor(vec1, vec1);
7623
7624 // compare wide vectors tail
7625 bind(COMPARE_WIDE_TAIL);
7626 testptr(result, result);
7627 jcc(Assembler::zero, LENGTH_DIFF_LABEL);
7628
7629 movl(result, stride2);
7630 movl(cnt2, result);
7631 negptr(result);
7632 jmp(COMPARE_WIDE_VECTORS_LOOP_AVX2);
7633
7634 // Identifies the mismatching (higher or lower)16-bytes in the 32-byte vectors.
7635 bind(VECTOR_NOT_EQUAL);
7636 // clean upper bits of YMM registers
7637 vpxor(vec1, vec1);
7638 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
7639 lea(str1, Address(str1, result, scale));
7640 lea(str2, Address(str2, result, scale));
7641 } else {
7642 lea(str1, Address(str1, result, scale1));
7643 lea(str2, Address(str2, result, scale2));
7644 }
7645 jmp(COMPARE_16_CHARS);
7646
7647 // Compare tail chars, length between 1 to 15 chars
7648 bind(COMPARE_TAIL_LONG);
7649 movl(cnt2, result);
7650 cmpl(cnt2, stride);
7651 jcc(Assembler::less, COMPARE_SMALL_STR);
7652
7653 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
7654 movdqu(vec1, Address(str1, 0));
7655 } else {
7656 pmovzxbw(vec1, Address(str1, 0));
7657 }
7658 pcmpestri(vec1, Address(str2, 0), pcmpmask);
7659 jcc(Assembler::below, COMPARE_INDEX_CHAR);
7660 subptr(cnt2, stride);
7661 jcc(Assembler::zero, LENGTH_DIFF_LABEL);
7662 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
7663 lea(str1, Address(str1, result, scale));
7664 lea(str2, Address(str2, result, scale));
7665 } else {
7666 lea(str1, Address(str1, result, scale1));
7667 lea(str2, Address(str2, result, scale2));
7668 }
7669 negptr(cnt2);
7670 jmpb(WHILE_HEAD_LABEL);
7671
7672 bind(COMPARE_SMALL_STR);
7673 } else if (UseSSE42Intrinsics) {
7674 Label COMPARE_WIDE_VECTORS, VECTOR_NOT_EQUAL, COMPARE_TAIL;
7675 int pcmpmask = 0x19;
7676 // Setup to compare 8-char (16-byte) vectors,
7677 // start from first character again because it has aligned address.
7678 movl(result, cnt2);
7679 andl(cnt2, ~(stride - 1)); // cnt2 holds the vector count
7680 if (ae == StrIntrinsicNode::LL) {
7681 pcmpmask &= ~0x01;
7682 }
7683 jcc(Assembler::zero, COMPARE_TAIL);
7684 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
7685 lea(str1, Address(str1, result, scale));
7686 lea(str2, Address(str2, result, scale));
7687 } else {
7688 lea(str1, Address(str1, result, scale1));
7689 lea(str2, Address(str2, result, scale2));
7690 }
7691 negptr(result);
7692
7693 // pcmpestri
7694 // inputs:
7695 // vec1- substring
7696 // rax - negative string length (elements count)
7697 // mem - scanned string
7698 // rdx - string length (elements count)
7699 // pcmpmask - cmp mode: 11000 (string compare with negated result)
7700 // + 00 (unsigned bytes) or + 01 (unsigned shorts)
7701 // outputs:
7702 // rcx - first mismatched element index
7703 assert(result == rax && cnt2 == rdx && cnt1 == rcx, "pcmpestri");
7704
7705 bind(COMPARE_WIDE_VECTORS);
7706 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
7707 movdqu(vec1, Address(str1, result, scale));
7708 pcmpestri(vec1, Address(str2, result, scale), pcmpmask);
7709 } else {
7710 pmovzxbw(vec1, Address(str1, result, scale1));
7711 pcmpestri(vec1, Address(str2, result, scale2), pcmpmask);
7712 }
7713 // After pcmpestri cnt1(rcx) contains mismatched element index
7714
7715 jccb(Assembler::below, VECTOR_NOT_EQUAL); // CF==1
7716 addptr(result, stride);
7717 subptr(cnt2, stride);
7718 jccb(Assembler::notZero, COMPARE_WIDE_VECTORS);
7719
7720 // compare wide vectors tail
7721 testptr(result, result);
7722 jcc(Assembler::zero, LENGTH_DIFF_LABEL);
7723
7724 movl(cnt2, stride);
7725 movl(result, stride);
7726 negptr(result);
7727 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
7728 movdqu(vec1, Address(str1, result, scale));
7729 pcmpestri(vec1, Address(str2, result, scale), pcmpmask);
7730 } else {
7731 pmovzxbw(vec1, Address(str1, result, scale1));
7732 pcmpestri(vec1, Address(str2, result, scale2), pcmpmask);
7733 }
7734 jccb(Assembler::aboveEqual, LENGTH_DIFF_LABEL);
7735
7736 // Mismatched characters in the vectors
7737 bind(VECTOR_NOT_EQUAL);
7738 addptr(cnt1, result);
7739 load_next_elements(result, cnt2, str1, str2, scale, scale1, scale2, cnt1, ae);
7740 subl(result, cnt2);
7741 jmpb(POP_LABEL);
7742
7743 bind(COMPARE_TAIL); // limit is zero
7744 movl(cnt2, result);
7745 // Fallthru to tail compare
7746 }
7747 // Shift str2 and str1 to the end of the arrays, negate min
7748 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) {
7749 lea(str1, Address(str1, cnt2, scale));
7750 lea(str2, Address(str2, cnt2, scale));
7751 } else {
7752 lea(str1, Address(str1, cnt2, scale1));
7753 lea(str2, Address(str2, cnt2, scale2));
7754 }
7755 decrementl(cnt2); // first character was compared already
7756 negptr(cnt2);
7757
7758 // Compare the rest of the elements
7759 bind(WHILE_HEAD_LABEL);
7760 load_next_elements(result, cnt1, str1, str2, scale, scale1, scale2, cnt2, ae);
7761 subl(result, cnt1);
7762 jccb(Assembler::notZero, POP_LABEL);
7763 increment(cnt2);
7764 jccb(Assembler::notZero, WHILE_HEAD_LABEL);
7765
7766 // Strings are equal up to min length. Return the length difference.
7767 bind(LENGTH_DIFF_LABEL);
7768 pop(result);
7769 if (ae == StrIntrinsicNode::UU) {
7770 // Divide diff by 2 to get number of chars
7771 sarl(result, 1);
7772 }
7773 jmpb(DONE_LABEL);
7774
7775 #ifdef _LP64
7776 if (VM_Version::supports_avx512vlbw()) {
7777
7778 bind(COMPARE_WIDE_VECTORS_LOOP_FAILED);
7779
7780 kmovql(cnt1, k7);
7781 notq(cnt1);
7782 bsfq(cnt2, cnt1);
7783 if (ae != StrIntrinsicNode::LL) {
7784 // Divide diff by 2 to get number of chars
7785 sarl(cnt2, 1);
7786 }
7787 addq(result, cnt2);
7788 if (ae == StrIntrinsicNode::LL) {
7789 load_unsigned_byte(cnt1, Address(str2, result));
7790 load_unsigned_byte(result, Address(str1, result));
7791 } else if (ae == StrIntrinsicNode::UU) {
7792 load_unsigned_short(cnt1, Address(str2, result, scale));
7793 load_unsigned_short(result, Address(str1, result, scale));
7794 } else {
7795 load_unsigned_short(cnt1, Address(str2, result, scale2));
7796 load_unsigned_byte(result, Address(str1, result, scale1));
7797 }
7798 subl(result, cnt1);
7799 jmpb(POP_LABEL);
7800 }//if (VM_Version::supports_avx512vlbw())
7801 #endif // _LP64
7802
7803 // Discard the stored length difference
7804 bind(POP_LABEL);
7805 pop(cnt1);
7806
7807 // That's it
7808 bind(DONE_LABEL);
7809 if(ae == StrIntrinsicNode::UL) {
7810 negl(result);
7811 }
7812
7813 }
7814
7815 // Search for Non-ASCII character (Negative byte value) in a byte array,
7816 // return true if it has any and false otherwise.
7817 // ..\jdk\src\java.base\share\classes\java\lang\StringCoding.java
7818 // @HotSpotIntrinsicCandidate
7819 // private static boolean hasNegatives(byte[] ba, int off, int len) {
7820 // for (int i = off; i < off + len; i++) {
7821 // if (ba[i] < 0) {
7822 // return true;
7823 // }
7824 // }
7825 // return false;
7826 // }
7827 void MacroAssembler::has_negatives(Register ary1, Register len,
7828 Register result, Register tmp1,
7829 XMMRegister vec1, XMMRegister vec2) {
7830 // rsi: byte array
7831 // rcx: len
7832 // rax: result
7833 ShortBranchVerifier sbv(this);
7834 assert_different_registers(ary1, len, result, tmp1);
7835 assert_different_registers(vec1, vec2);
7836 Label TRUE_LABEL, FALSE_LABEL, DONE, COMPARE_CHAR, COMPARE_VECTORS, COMPARE_BYTE;
7837
7838 // len == 0
7839 testl(len, len);
7840 jcc(Assembler::zero, FALSE_LABEL);
7841
7842 if ((UseAVX > 2) && // AVX512
7843 VM_Version::supports_avx512vlbw() &&
7844 VM_Version::supports_bmi2()) {
7845
7846 set_vector_masking(); // opening of the stub context for programming mask registers
7847
7848 Label test_64_loop, test_tail;
7849 Register tmp3_aliased = len;
7850
7851 movl(tmp1, len);
7852 vpxor(vec2, vec2, vec2, Assembler::AVX_512bit);
7853
7854 andl(tmp1, 64 - 1); // tail count (in chars) 0x3F
7855 andl(len, ~(64 - 1)); // vector count (in chars)
7856 jccb(Assembler::zero, test_tail);
7857
7858 lea(ary1, Address(ary1, len, Address::times_1));
7859 negptr(len);
7860
7861 bind(test_64_loop);
7862 // Check whether our 64 elements of size byte contain negatives
7863 evpcmpgtb(k2, vec2, Address(ary1, len, Address::times_1), Assembler::AVX_512bit);
7864 kortestql(k2, k2);
7865 jcc(Assembler::notZero, TRUE_LABEL);
7866
7867 addptr(len, 64);
7868 jccb(Assembler::notZero, test_64_loop);
7869
7870
7871 bind(test_tail);
7872 // bail out when there is nothing to be done
7873 testl(tmp1, -1);
7874 jcc(Assembler::zero, FALSE_LABEL);
7875
7876 // Save k1
7877 kmovql(k3, k1);
7878
7879 // ~(~0 << len) applied up to two times (for 32-bit scenario)
7880 #ifdef _LP64
7881 mov64(tmp3_aliased, 0xFFFFFFFFFFFFFFFF);
7882 shlxq(tmp3_aliased, tmp3_aliased, tmp1);
7883 notq(tmp3_aliased);
7884 kmovql(k1, tmp3_aliased);
7885 #else
7886 Label k_init;
7887 jmp(k_init);
7888
7889 // We could not read 64-bits from a general purpose register thus we move
7890 // data required to compose 64 1's to the instruction stream
7891 // We emit 64 byte wide series of elements from 0..63 which later on would
7892 // be used as a compare targets with tail count contained in tmp1 register.
7893 // Result would be a k1 register having tmp1 consecutive number or 1
7894 // counting from least significant bit.
7895 address tmp = pc();
7896 emit_int64(0x0706050403020100);
7897 emit_int64(0x0F0E0D0C0B0A0908);
7898 emit_int64(0x1716151413121110);
7899 emit_int64(0x1F1E1D1C1B1A1918);
7900 emit_int64(0x2726252423222120);
7901 emit_int64(0x2F2E2D2C2B2A2928);
7902 emit_int64(0x3736353433323130);
7903 emit_int64(0x3F3E3D3C3B3A3938);
7904
7905 bind(k_init);
7906 lea(len, InternalAddress(tmp));
7907 // create mask to test for negative byte inside a vector
7908 evpbroadcastb(vec1, tmp1, Assembler::AVX_512bit);
7909 evpcmpgtb(k1, vec1, Address(len, 0), Assembler::AVX_512bit);
7910
7911 #endif
7912 evpcmpgtb(k2, k1, vec2, Address(ary1, 0), Assembler::AVX_512bit);
7913 ktestq(k2, k1);
7914 // Restore k1
7915 kmovql(k1, k3);
7916 jcc(Assembler::notZero, TRUE_LABEL);
7917
7918 jmp(FALSE_LABEL);
7919
7920 clear_vector_masking(); // closing of the stub context for programming mask registers
7921 } else {
7922 movl(result, len); // copy
7923
7924 if (UseAVX == 2 && UseSSE >= 2) {
7925 // With AVX2, use 32-byte vector compare
7926 Label COMPARE_WIDE_VECTORS, COMPARE_TAIL;
7927
7928 // Compare 32-byte vectors
7929 andl(result, 0x0000001f); // tail count (in bytes)
7930 andl(len, 0xffffffe0); // vector count (in bytes)
7931 jccb(Assembler::zero, COMPARE_TAIL);
7932
7933 lea(ary1, Address(ary1, len, Address::times_1));
7934 negptr(len);
7935
7936 movl(tmp1, 0x80808080); // create mask to test for Unicode chars in vector
7937 movdl(vec2, tmp1);
7938 vpbroadcastd(vec2, vec2);
7939
7940 bind(COMPARE_WIDE_VECTORS);
7941 vmovdqu(vec1, Address(ary1, len, Address::times_1));
7942 vptest(vec1, vec2);
7943 jccb(Assembler::notZero, TRUE_LABEL);
7944 addptr(len, 32);
7945 jcc(Assembler::notZero, COMPARE_WIDE_VECTORS);
7946
7947 testl(result, result);
7948 jccb(Assembler::zero, FALSE_LABEL);
7949
7950 vmovdqu(vec1, Address(ary1, result, Address::times_1, -32));
7951 vptest(vec1, vec2);
7952 jccb(Assembler::notZero, TRUE_LABEL);
7953 jmpb(FALSE_LABEL);
7954
7955 bind(COMPARE_TAIL); // len is zero
7956 movl(len, result);
7957 // Fallthru to tail compare
7958 } else if (UseSSE42Intrinsics) {
7959 // With SSE4.2, use double quad vector compare
7960 Label COMPARE_WIDE_VECTORS, COMPARE_TAIL;
7961
7962 // Compare 16-byte vectors
7963 andl(result, 0x0000000f); // tail count (in bytes)
7964 andl(len, 0xfffffff0); // vector count (in bytes)
7965 jccb(Assembler::zero, COMPARE_TAIL);
7966
7967 lea(ary1, Address(ary1, len, Address::times_1));
7968 negptr(len);
7969
7970 movl(tmp1, 0x80808080);
7971 movdl(vec2, tmp1);
7972 pshufd(vec2, vec2, 0);
7973
7974 bind(COMPARE_WIDE_VECTORS);
7975 movdqu(vec1, Address(ary1, len, Address::times_1));
7976 ptest(vec1, vec2);
7977 jccb(Assembler::notZero, TRUE_LABEL);
7978 addptr(len, 16);
7979 jcc(Assembler::notZero, COMPARE_WIDE_VECTORS);
7980
7981 testl(result, result);
7982 jccb(Assembler::zero, FALSE_LABEL);
7983
7984 movdqu(vec1, Address(ary1, result, Address::times_1, -16));
7985 ptest(vec1, vec2);
7986 jccb(Assembler::notZero, TRUE_LABEL);
7987 jmpb(FALSE_LABEL);
7988
7989 bind(COMPARE_TAIL); // len is zero
7990 movl(len, result);
7991 // Fallthru to tail compare
7992 }
7993 }
7994 // Compare 4-byte vectors
7995 andl(len, 0xfffffffc); // vector count (in bytes)
7996 jccb(Assembler::zero, COMPARE_CHAR);
7997
7998 lea(ary1, Address(ary1, len, Address::times_1));
7999 negptr(len);
8000
8001 bind(COMPARE_VECTORS);
8002 movl(tmp1, Address(ary1, len, Address::times_1));
8003 andl(tmp1, 0x80808080);
8004 jccb(Assembler::notZero, TRUE_LABEL);
8005 addptr(len, 4);
8006 jcc(Assembler::notZero, COMPARE_VECTORS);
8007
8008 // Compare trailing char (final 2 bytes), if any
8009 bind(COMPARE_CHAR);
8010 testl(result, 0x2); // tail char
8011 jccb(Assembler::zero, COMPARE_BYTE);
8012 load_unsigned_short(tmp1, Address(ary1, 0));
8013 andl(tmp1, 0x00008080);
8014 jccb(Assembler::notZero, TRUE_LABEL);
8015 subptr(result, 2);
8016 lea(ary1, Address(ary1, 2));
8017
8018 bind(COMPARE_BYTE);
8019 testl(result, 0x1); // tail byte
8020 jccb(Assembler::zero, FALSE_LABEL);
8021 load_unsigned_byte(tmp1, Address(ary1, 0));
8022 andl(tmp1, 0x00000080);
8023 jccb(Assembler::notEqual, TRUE_LABEL);
8024 jmpb(FALSE_LABEL);
8025
8026 bind(TRUE_LABEL);
8027 movl(result, 1); // return true
8028 jmpb(DONE);
8029
8030 bind(FALSE_LABEL);
8031 xorl(result, result); // return false
8032
8033 // That's it
8034 bind(DONE);
8035 if (UseAVX >= 2 && UseSSE >= 2) {
8036 // clean upper bits of YMM registers
8037 vpxor(vec1, vec1);
8038 vpxor(vec2, vec2);
8039 }
8040 }
8041 // Compare char[] or byte[] arrays aligned to 4 bytes or substrings.
8042 void MacroAssembler::arrays_equals(bool is_array_equ, Register ary1, Register ary2,
8043 Register limit, Register result, Register chr,
8044 XMMRegister vec1, XMMRegister vec2, bool is_char) {
8045 ShortBranchVerifier sbv(this);
8046 Label TRUE_LABEL, FALSE_LABEL, DONE, COMPARE_VECTORS, COMPARE_CHAR, COMPARE_BYTE;
8047
8048 int length_offset = arrayOopDesc::length_offset_in_bytes();
8049 int base_offset = arrayOopDesc::base_offset_in_bytes(is_char ? T_CHAR : T_BYTE);
8050
8051 if (is_array_equ) {
8052 // Check the input args
8053 cmpoop(ary1, ary2);
8054 jcc(Assembler::equal, TRUE_LABEL);
8055
8056 // Need additional checks for arrays_equals.
8057 testptr(ary1, ary1);
8058 jcc(Assembler::zero, FALSE_LABEL);
8059 testptr(ary2, ary2);
8060 jcc(Assembler::zero, FALSE_LABEL);
8061
8062 // Check the lengths
8063 movl(limit, Address(ary1, length_offset));
8064 cmpl(limit, Address(ary2, length_offset));
8065 jcc(Assembler::notEqual, FALSE_LABEL);
8066 }
8067
8068 // count == 0
8069 testl(limit, limit);
8070 jcc(Assembler::zero, TRUE_LABEL);
8071
8072 if (is_array_equ) {
8073 // Load array address
8074 lea(ary1, Address(ary1, base_offset));
8075 lea(ary2, Address(ary2, base_offset));
8076 }
8077
8078 if (is_array_equ && is_char) {
8079 // arrays_equals when used for char[].
8080 shll(limit, 1); // byte count != 0
8081 }
8082 movl(result, limit); // copy
8083
8084 if (UseAVX >= 2) {
8085 // With AVX2, use 32-byte vector compare
8086 Label COMPARE_WIDE_VECTORS, COMPARE_TAIL;
8087
8088 // Compare 32-byte vectors
8089 andl(result, 0x0000001f); // tail count (in bytes)
8090 andl(limit, 0xffffffe0); // vector count (in bytes)
8091 jcc(Assembler::zero, COMPARE_TAIL);
8092
8093 lea(ary1, Address(ary1, limit, Address::times_1));
8094 lea(ary2, Address(ary2, limit, Address::times_1));
8095 negptr(limit);
8096
8097 bind(COMPARE_WIDE_VECTORS);
8098
8099 #ifdef _LP64
8100 if (VM_Version::supports_avx512vlbw()) { // trying 64 bytes fast loop
8101 Label COMPARE_WIDE_VECTORS_LOOP_AVX2, COMPARE_WIDE_VECTORS_LOOP_AVX3;
8102
8103 cmpl(limit, -64);
8104 jccb(Assembler::greater, COMPARE_WIDE_VECTORS_LOOP_AVX2);
8105
8106 bind(COMPARE_WIDE_VECTORS_LOOP_AVX3); // the hottest loop
8107
8108 evmovdquq(vec1, Address(ary1, limit, Address::times_1), Assembler::AVX_512bit);
8109 evpcmpeqb(k7, vec1, Address(ary2, limit, Address::times_1), Assembler::AVX_512bit);
8110 kortestql(k7, k7);
8111 jcc(Assembler::aboveEqual, FALSE_LABEL); // miscompare
8112 addptr(limit, 64); // update since we already compared at this addr
8113 cmpl(limit, -64);
8114 jccb(Assembler::lessEqual, COMPARE_WIDE_VECTORS_LOOP_AVX3);
8115
8116 // At this point we may still need to compare -limit+result bytes.
8117 // We could execute the next two instruction and just continue via non-wide path:
8118 // cmpl(limit, 0);
8119 // jcc(Assembler::equal, COMPARE_TAIL); // true
8120 // But since we stopped at the points ary{1,2}+limit which are
8121 // not farther than 64 bytes from the ends of arrays ary{1,2}+result
8122 // (|limit| <= 32 and result < 32),
8123 // we may just compare the last 64 bytes.
8124 //
8125 addptr(result, -64); // it is safe, bc we just came from this area
8126 evmovdquq(vec1, Address(ary1, result, Address::times_1), Assembler::AVX_512bit);
8127 evpcmpeqb(k7, vec1, Address(ary2, result, Address::times_1), Assembler::AVX_512bit);
8128 kortestql(k7, k7);
8129 jcc(Assembler::aboveEqual, FALSE_LABEL); // miscompare
8130
8131 jmp(TRUE_LABEL);
8132
8133 bind(COMPARE_WIDE_VECTORS_LOOP_AVX2);
8134
8135 }//if (VM_Version::supports_avx512vlbw())
8136 #endif //_LP64
8137
8138 vmovdqu(vec1, Address(ary1, limit, Address::times_1));
8139 vmovdqu(vec2, Address(ary2, limit, Address::times_1));
8140 vpxor(vec1, vec2);
8141
8142 vptest(vec1, vec1);
8143 jcc(Assembler::notZero, FALSE_LABEL);
8144 addptr(limit, 32);
8145 jcc(Assembler::notZero, COMPARE_WIDE_VECTORS);
8146
8147 testl(result, result);
8148 jcc(Assembler::zero, TRUE_LABEL);
8149
8150 vmovdqu(vec1, Address(ary1, result, Address::times_1, -32));
8151 vmovdqu(vec2, Address(ary2, result, Address::times_1, -32));
8152 vpxor(vec1, vec2);
8153
8154 vptest(vec1, vec1);
8155 jccb(Assembler::notZero, FALSE_LABEL);
8156 jmpb(TRUE_LABEL);
8157
8158 bind(COMPARE_TAIL); // limit is zero
8159 movl(limit, result);
8160 // Fallthru to tail compare
8161 } else if (UseSSE42Intrinsics) {
8162 // With SSE4.2, use double quad vector compare
8163 Label COMPARE_WIDE_VECTORS, COMPARE_TAIL;
8164
8165 // Compare 16-byte vectors
8166 andl(result, 0x0000000f); // tail count (in bytes)
8167 andl(limit, 0xfffffff0); // vector count (in bytes)
8168 jcc(Assembler::zero, COMPARE_TAIL);
8169
8170 lea(ary1, Address(ary1, limit, Address::times_1));
8171 lea(ary2, Address(ary2, limit, Address::times_1));
8172 negptr(limit);
8173
8174 bind(COMPARE_WIDE_VECTORS);
8175 movdqu(vec1, Address(ary1, limit, Address::times_1));
8176 movdqu(vec2, Address(ary2, limit, Address::times_1));
8177 pxor(vec1, vec2);
8178
8179 ptest(vec1, vec1);
8180 jcc(Assembler::notZero, FALSE_LABEL);
8181 addptr(limit, 16);
8182 jcc(Assembler::notZero, COMPARE_WIDE_VECTORS);
8183
8184 testl(result, result);
8185 jcc(Assembler::zero, TRUE_LABEL);
8186
8187 movdqu(vec1, Address(ary1, result, Address::times_1, -16));
8188 movdqu(vec2, Address(ary2, result, Address::times_1, -16));
8189 pxor(vec1, vec2);
8190
8191 ptest(vec1, vec1);
8192 jccb(Assembler::notZero, FALSE_LABEL);
8193 jmpb(TRUE_LABEL);
8194
8195 bind(COMPARE_TAIL); // limit is zero
8196 movl(limit, result);
8197 // Fallthru to tail compare
8198 }
8199
8200 // Compare 4-byte vectors
8201 andl(limit, 0xfffffffc); // vector count (in bytes)
8202 jccb(Assembler::zero, COMPARE_CHAR);
8203
8204 lea(ary1, Address(ary1, limit, Address::times_1));
8205 lea(ary2, Address(ary2, limit, Address::times_1));
8206 negptr(limit);
8207
8208 bind(COMPARE_VECTORS);
8209 movl(chr, Address(ary1, limit, Address::times_1));
8210 cmpl(chr, Address(ary2, limit, Address::times_1));
8211 jccb(Assembler::notEqual, FALSE_LABEL);
8212 addptr(limit, 4);
8213 jcc(Assembler::notZero, COMPARE_VECTORS);
8214
8215 // Compare trailing char (final 2 bytes), if any
8216 bind(COMPARE_CHAR);
8217 testl(result, 0x2); // tail char
8218 jccb(Assembler::zero, COMPARE_BYTE);
8219 load_unsigned_short(chr, Address(ary1, 0));
8220 load_unsigned_short(limit, Address(ary2, 0));
8221 cmpl(chr, limit);
8222 jccb(Assembler::notEqual, FALSE_LABEL);
8223
8224 if (is_array_equ && is_char) {
8225 bind(COMPARE_BYTE);
8226 } else {
8227 lea(ary1, Address(ary1, 2));
8228 lea(ary2, Address(ary2, 2));
8229
8230 bind(COMPARE_BYTE);
8231 testl(result, 0x1); // tail byte
8232 jccb(Assembler::zero, TRUE_LABEL);
8233 load_unsigned_byte(chr, Address(ary1, 0));
8234 load_unsigned_byte(limit, Address(ary2, 0));
8235 cmpl(chr, limit);
8236 jccb(Assembler::notEqual, FALSE_LABEL);
8237 }
8238 bind(TRUE_LABEL);
8239 movl(result, 1); // return true
8240 jmpb(DONE);
8241
8242 bind(FALSE_LABEL);
8243 xorl(result, result); // return false
8244
8245 // That's it
8246 bind(DONE);
8247 if (UseAVX >= 2) {
8248 // clean upper bits of YMM registers
8249 vpxor(vec1, vec1);
8250 vpxor(vec2, vec2);
8251 }
8252 }
8253
8254 #endif
8255
8256 void MacroAssembler::generate_fill(BasicType t, bool aligned,
8257 Register to, Register value, Register count,
8258 Register rtmp, XMMRegister xtmp) {
8259 ShortBranchVerifier sbv(this);
8260 assert_different_registers(to, value, count, rtmp);
8261 Label L_exit, L_skip_align1, L_skip_align2, L_fill_byte;
8262 Label L_fill_2_bytes, L_fill_4_bytes;
8263
8264 int shift = -1;
8265 switch (t) {
8266 case T_BYTE:
8267 shift = 2;
8268 break;
8269 case T_SHORT:
8270 shift = 1;
8271 break;
8272 case T_INT:
8273 shift = 0;
8274 break;
8275 default: ShouldNotReachHere();
8276 }
8277
8278 if (t == T_BYTE) {
8279 andl(value, 0xff);
8280 movl(rtmp, value);
8281 shll(rtmp, 8);
8282 orl(value, rtmp);
8283 }
8284 if (t == T_SHORT) {
8285 andl(value, 0xffff);
8286 }
8287 if (t == T_BYTE || t == T_SHORT) {
8288 movl(rtmp, value);
8289 shll(rtmp, 16);
8290 orl(value, rtmp);
8291 }
8292
8293 cmpl(count, 2<<shift); // Short arrays (< 8 bytes) fill by element
8294 jcc(Assembler::below, L_fill_4_bytes); // use unsigned cmp
8295 if (!UseUnalignedLoadStores && !aligned && (t == T_BYTE || t == T_SHORT)) {
8296 // align source address at 4 bytes address boundary
8297 if (t == T_BYTE) {
8298 // One byte misalignment happens only for byte arrays
8299 testptr(to, 1);
8300 jccb(Assembler::zero, L_skip_align1);
8301 movb(Address(to, 0), value);
8302 increment(to);
8303 decrement(count);
8304 BIND(L_skip_align1);
8305 }
8306 // Two bytes misalignment happens only for byte and short (char) arrays
8307 testptr(to, 2);
8308 jccb(Assembler::zero, L_skip_align2);
8309 movw(Address(to, 0), value);
8310 addptr(to, 2);
8311 subl(count, 1<<(shift-1));
8312 BIND(L_skip_align2);
8313 }
8314 if (UseSSE < 2) {
8315 Label L_fill_32_bytes_loop, L_check_fill_8_bytes, L_fill_8_bytes_loop, L_fill_8_bytes;
8316 // Fill 32-byte chunks
8317 subl(count, 8 << shift);
8318 jcc(Assembler::less, L_check_fill_8_bytes);
8319 align(16);
8320
8321 BIND(L_fill_32_bytes_loop);
8322
8323 for (int i = 0; i < 32; i += 4) {
8324 movl(Address(to, i), value);
8325 }
8326
8327 addptr(to, 32);
8328 subl(count, 8 << shift);
8329 jcc(Assembler::greaterEqual, L_fill_32_bytes_loop);
8330 BIND(L_check_fill_8_bytes);
8331 addl(count, 8 << shift);
8332 jccb(Assembler::zero, L_exit);
8333 jmpb(L_fill_8_bytes);
8334
8335 //
8336 // length is too short, just fill qwords
8337 //
8338 BIND(L_fill_8_bytes_loop);
8339 movl(Address(to, 0), value);
8340 movl(Address(to, 4), value);
8341 addptr(to, 8);
8342 BIND(L_fill_8_bytes);
8343 subl(count, 1 << (shift + 1));
8344 jcc(Assembler::greaterEqual, L_fill_8_bytes_loop);
8345 // fall through to fill 4 bytes
8346 } else {
8347 Label L_fill_32_bytes;
8348 if (!UseUnalignedLoadStores) {
8349 // align to 8 bytes, we know we are 4 byte aligned to start
8350 testptr(to, 4);
8351 jccb(Assembler::zero, L_fill_32_bytes);
8352 movl(Address(to, 0), value);
8353 addptr(to, 4);
8354 subl(count, 1<<shift);
8355 }
8356 BIND(L_fill_32_bytes);
8357 {
8358 assert( UseSSE >= 2, "supported cpu only" );
8359 Label L_fill_32_bytes_loop, L_check_fill_8_bytes, L_fill_8_bytes_loop, L_fill_8_bytes;
8360 if (UseAVX > 2) {
8361 movl(rtmp, 0xffff);
8362 kmovwl(k1, rtmp);
8363 }
8364 movdl(xtmp, value);
8365 if (UseAVX > 2 && UseUnalignedLoadStores) {
8366 // Fill 64-byte chunks
8367 Label L_fill_64_bytes_loop, L_check_fill_32_bytes;
8368 evpbroadcastd(xtmp, xtmp, Assembler::AVX_512bit);
8369
8370 subl(count, 16 << shift);
8371 jcc(Assembler::less, L_check_fill_32_bytes);
8372 align(16);
8373
8374 BIND(L_fill_64_bytes_loop);
8375 evmovdqul(Address(to, 0), xtmp, Assembler::AVX_512bit);
8376 addptr(to, 64);
8377 subl(count, 16 << shift);
8378 jcc(Assembler::greaterEqual, L_fill_64_bytes_loop);
8379
8380 BIND(L_check_fill_32_bytes);
8381 addl(count, 8 << shift);
8382 jccb(Assembler::less, L_check_fill_8_bytes);
8383 vmovdqu(Address(to, 0), xtmp);
8384 addptr(to, 32);
8385 subl(count, 8 << shift);
8386
8387 BIND(L_check_fill_8_bytes);
8388 } else if (UseAVX == 2 && UseUnalignedLoadStores) {
8389 // Fill 64-byte chunks
8390 Label L_fill_64_bytes_loop, L_check_fill_32_bytes;
8391 vpbroadcastd(xtmp, xtmp);
8392
8393 subl(count, 16 << shift);
8394 jcc(Assembler::less, L_check_fill_32_bytes);
8395 align(16);
8396
8397 BIND(L_fill_64_bytes_loop);
8398 vmovdqu(Address(to, 0), xtmp);
8399 vmovdqu(Address(to, 32), xtmp);
8400 addptr(to, 64);
8401 subl(count, 16 << shift);
8402 jcc(Assembler::greaterEqual, L_fill_64_bytes_loop);
8403
8404 BIND(L_check_fill_32_bytes);
8405 addl(count, 8 << shift);
8406 jccb(Assembler::less, L_check_fill_8_bytes);
8407 vmovdqu(Address(to, 0), xtmp);
8408 addptr(to, 32);
8409 subl(count, 8 << shift);
8410
8411 BIND(L_check_fill_8_bytes);
8412 // clean upper bits of YMM registers
8413 movdl(xtmp, value);
8414 pshufd(xtmp, xtmp, 0);
8415 } else {
8416 // Fill 32-byte chunks
8417 pshufd(xtmp, xtmp, 0);
8418
8419 subl(count, 8 << shift);
8420 jcc(Assembler::less, L_check_fill_8_bytes);
8421 align(16);
8422
8423 BIND(L_fill_32_bytes_loop);
8424
8425 if (UseUnalignedLoadStores) {
8426 movdqu(Address(to, 0), xtmp);
8427 movdqu(Address(to, 16), xtmp);
8428 } else {
8429 movq(Address(to, 0), xtmp);
8430 movq(Address(to, 8), xtmp);
8431 movq(Address(to, 16), xtmp);
8432 movq(Address(to, 24), xtmp);
8433 }
8434
8435 addptr(to, 32);
8436 subl(count, 8 << shift);
8437 jcc(Assembler::greaterEqual, L_fill_32_bytes_loop);
8438
8439 BIND(L_check_fill_8_bytes);
8440 }
8441 addl(count, 8 << shift);
8442 jccb(Assembler::zero, L_exit);
8443 jmpb(L_fill_8_bytes);
8444
8445 //
8446 // length is too short, just fill qwords
8447 //
8448 BIND(L_fill_8_bytes_loop);
8449 movq(Address(to, 0), xtmp);
8450 addptr(to, 8);
8451 BIND(L_fill_8_bytes);
8452 subl(count, 1 << (shift + 1));
8453 jcc(Assembler::greaterEqual, L_fill_8_bytes_loop);
8454 }
8455 }
8456 // fill trailing 4 bytes
8457 BIND(L_fill_4_bytes);
8458 testl(count, 1<<shift);
8459 jccb(Assembler::zero, L_fill_2_bytes);
8460 movl(Address(to, 0), value);
8461 if (t == T_BYTE || t == T_SHORT) {
8462 addptr(to, 4);
8463 BIND(L_fill_2_bytes);
8464 // fill trailing 2 bytes
8465 testl(count, 1<<(shift-1));
8466 jccb(Assembler::zero, L_fill_byte);
8467 movw(Address(to, 0), value);
8468 if (t == T_BYTE) {
8469 addptr(to, 2);
8470 BIND(L_fill_byte);
8471 // fill trailing byte
8472 testl(count, 1);
8473 jccb(Assembler::zero, L_exit);
8474 movb(Address(to, 0), value);
8475 } else {
8476 BIND(L_fill_byte);
8477 }
8478 } else {
8479 BIND(L_fill_2_bytes);
8480 }
8481 BIND(L_exit);
8482 }
8483
8484 // encode char[] to byte[] in ISO_8859_1
8485 //@HotSpotIntrinsicCandidate
8486 //private static int implEncodeISOArray(byte[] sa, int sp,
8487 //byte[] da, int dp, int len) {
8488 // int i = 0;
8489 // for (; i < len; i++) {
8490 // char c = StringUTF16.getChar(sa, sp++);
8491 // if (c > '\u00FF')
8492 // break;
8493 // da[dp++] = (byte)c;
8494 // }
8495 // return i;
8496 //}
8497 void MacroAssembler::encode_iso_array(Register src, Register dst, Register len,
8498 XMMRegister tmp1Reg, XMMRegister tmp2Reg,
8499 XMMRegister tmp3Reg, XMMRegister tmp4Reg,
8500 Register tmp5, Register result) {
8501
8502 // rsi: src
8503 // rdi: dst
8504 // rdx: len
8505 // rcx: tmp5
8506 // rax: result
8507 ShortBranchVerifier sbv(this);
8508 assert_different_registers(src, dst, len, tmp5, result);
8509 Label L_done, L_copy_1_char, L_copy_1_char_exit;
8510
8511 // set result
8512 xorl(result, result);
8513 // check for zero length
8514 testl(len, len);
8515 jcc(Assembler::zero, L_done);
8516
8517 movl(result, len);
8518
8519 // Setup pointers
8520 lea(src, Address(src, len, Address::times_2)); // char[]
8521 lea(dst, Address(dst, len, Address::times_1)); // byte[]
8522 negptr(len);
8523
8524 if (UseSSE42Intrinsics || UseAVX >= 2) {
8525 Label L_chars_8_check, L_copy_8_chars, L_copy_8_chars_exit;
8526 Label L_chars_16_check, L_copy_16_chars, L_copy_16_chars_exit;
8527
8528 if (UseAVX >= 2) {
8529 Label L_chars_32_check, L_copy_32_chars, L_copy_32_chars_exit;
8530 movl(tmp5, 0xff00ff00); // create mask to test for Unicode chars in vector
8531 movdl(tmp1Reg, tmp5);
8532 vpbroadcastd(tmp1Reg, tmp1Reg);
8533 jmp(L_chars_32_check);
8534
8535 bind(L_copy_32_chars);
8536 vmovdqu(tmp3Reg, Address(src, len, Address::times_2, -64));
8537 vmovdqu(tmp4Reg, Address(src, len, Address::times_2, -32));
8538 vpor(tmp2Reg, tmp3Reg, tmp4Reg, /* vector_len */ 1);
8539 vptest(tmp2Reg, tmp1Reg); // check for Unicode chars in vector
8540 jccb(Assembler::notZero, L_copy_32_chars_exit);
8541 vpackuswb(tmp3Reg, tmp3Reg, tmp4Reg, /* vector_len */ 1);
8542 vpermq(tmp4Reg, tmp3Reg, 0xD8, /* vector_len */ 1);
8543 vmovdqu(Address(dst, len, Address::times_1, -32), tmp4Reg);
8544
8545 bind(L_chars_32_check);
8546 addptr(len, 32);
8547 jcc(Assembler::lessEqual, L_copy_32_chars);
8548
8549 bind(L_copy_32_chars_exit);
8550 subptr(len, 16);
8551 jccb(Assembler::greater, L_copy_16_chars_exit);
8552
8553 } else if (UseSSE42Intrinsics) {
8554 movl(tmp5, 0xff00ff00); // create mask to test for Unicode chars in vector
8555 movdl(tmp1Reg, tmp5);
8556 pshufd(tmp1Reg, tmp1Reg, 0);
8557 jmpb(L_chars_16_check);
8558 }
8559
8560 bind(L_copy_16_chars);
8561 if (UseAVX >= 2) {
8562 vmovdqu(tmp2Reg, Address(src, len, Address::times_2, -32));
8563 vptest(tmp2Reg, tmp1Reg);
8564 jcc(Assembler::notZero, L_copy_16_chars_exit);
8565 vpackuswb(tmp2Reg, tmp2Reg, tmp1Reg, /* vector_len */ 1);
8566 vpermq(tmp3Reg, tmp2Reg, 0xD8, /* vector_len */ 1);
8567 } else {
8568 if (UseAVX > 0) {
8569 movdqu(tmp3Reg, Address(src, len, Address::times_2, -32));
8570 movdqu(tmp4Reg, Address(src, len, Address::times_2, -16));
8571 vpor(tmp2Reg, tmp3Reg, tmp4Reg, /* vector_len */ 0);
8572 } else {
8573 movdqu(tmp3Reg, Address(src, len, Address::times_2, -32));
8574 por(tmp2Reg, tmp3Reg);
8575 movdqu(tmp4Reg, Address(src, len, Address::times_2, -16));
8576 por(tmp2Reg, tmp4Reg);
8577 }
8578 ptest(tmp2Reg, tmp1Reg); // check for Unicode chars in vector
8579 jccb(Assembler::notZero, L_copy_16_chars_exit);
8580 packuswb(tmp3Reg, tmp4Reg);
8581 }
8582 movdqu(Address(dst, len, Address::times_1, -16), tmp3Reg);
8583
8584 bind(L_chars_16_check);
8585 addptr(len, 16);
8586 jcc(Assembler::lessEqual, L_copy_16_chars);
8587
8588 bind(L_copy_16_chars_exit);
8589 if (UseAVX >= 2) {
8590 // clean upper bits of YMM registers
8591 vpxor(tmp2Reg, tmp2Reg);
8592 vpxor(tmp3Reg, tmp3Reg);
8593 vpxor(tmp4Reg, tmp4Reg);
8594 movdl(tmp1Reg, tmp5);
8595 pshufd(tmp1Reg, tmp1Reg, 0);
8596 }
8597 subptr(len, 8);
8598 jccb(Assembler::greater, L_copy_8_chars_exit);
8599
8600 bind(L_copy_8_chars);
8601 movdqu(tmp3Reg, Address(src, len, Address::times_2, -16));
8602 ptest(tmp3Reg, tmp1Reg);
8603 jccb(Assembler::notZero, L_copy_8_chars_exit);
8604 packuswb(tmp3Reg, tmp1Reg);
8605 movq(Address(dst, len, Address::times_1, -8), tmp3Reg);
8606 addptr(len, 8);
8607 jccb(Assembler::lessEqual, L_copy_8_chars);
8608
8609 bind(L_copy_8_chars_exit);
8610 subptr(len, 8);
8611 jccb(Assembler::zero, L_done);
8612 }
8613
8614 bind(L_copy_1_char);
8615 load_unsigned_short(tmp5, Address(src, len, Address::times_2, 0));
8616 testl(tmp5, 0xff00); // check if Unicode char
8617 jccb(Assembler::notZero, L_copy_1_char_exit);
8618 movb(Address(dst, len, Address::times_1, 0), tmp5);
8619 addptr(len, 1);
8620 jccb(Assembler::less, L_copy_1_char);
8621
8622 bind(L_copy_1_char_exit);
8623 addptr(result, len); // len is negative count of not processed elements
8624
8625 bind(L_done);
8626 }
8627
8628 #ifdef _LP64
8629 /**
8630 * Helper for multiply_to_len().
8631 */
8632 void MacroAssembler::add2_with_carry(Register dest_hi, Register dest_lo, Register src1, Register src2) {
8633 addq(dest_lo, src1);
8634 adcq(dest_hi, 0);
8635 addq(dest_lo, src2);
8636 adcq(dest_hi, 0);
8637 }
8638
8639 /**
8640 * Multiply 64 bit by 64 bit first loop.
8641 */
8642 void MacroAssembler::multiply_64_x_64_loop(Register x, Register xstart, Register x_xstart,
8643 Register y, Register y_idx, Register z,
8644 Register carry, Register product,
8645 Register idx, Register kdx) {
8646 //
8647 // jlong carry, x[], y[], z[];
8648 // for (int idx=ystart, kdx=ystart+1+xstart; idx >= 0; idx-, kdx--) {
8649 // huge_128 product = y[idx] * x[xstart] + carry;
8650 // z[kdx] = (jlong)product;
8651 // carry = (jlong)(product >>> 64);
8652 // }
8653 // z[xstart] = carry;
8654 //
8655
8656 Label L_first_loop, L_first_loop_exit;
8657 Label L_one_x, L_one_y, L_multiply;
8658
8659 decrementl(xstart);
8660 jcc(Assembler::negative, L_one_x);
8661
8662 movq(x_xstart, Address(x, xstart, Address::times_4, 0));
8663 rorq(x_xstart, 32); // convert big-endian to little-endian
8664
8665 bind(L_first_loop);
8666 decrementl(idx);
8667 jcc(Assembler::negative, L_first_loop_exit);
8668 decrementl(idx);
8669 jcc(Assembler::negative, L_one_y);
8670 movq(y_idx, Address(y, idx, Address::times_4, 0));
8671 rorq(y_idx, 32); // convert big-endian to little-endian
8672 bind(L_multiply);
8673 movq(product, x_xstart);
8674 mulq(y_idx); // product(rax) * y_idx -> rdx:rax
8675 addq(product, carry);
8676 adcq(rdx, 0);
8677 subl(kdx, 2);
8678 movl(Address(z, kdx, Address::times_4, 4), product);
8679 shrq(product, 32);
8680 movl(Address(z, kdx, Address::times_4, 0), product);
8681 movq(carry, rdx);
8682 jmp(L_first_loop);
8683
8684 bind(L_one_y);
8685 movl(y_idx, Address(y, 0));
8686 jmp(L_multiply);
8687
8688 bind(L_one_x);
8689 movl(x_xstart, Address(x, 0));
8690 jmp(L_first_loop);
8691
8692 bind(L_first_loop_exit);
8693 }
8694
8695 /**
8696 * Multiply 64 bit by 64 bit and add 128 bit.
8697 */
8698 void MacroAssembler::multiply_add_128_x_128(Register x_xstart, Register y, Register z,
8699 Register yz_idx, Register idx,
8700 Register carry, Register product, int offset) {
8701 // huge_128 product = (y[idx] * x_xstart) + z[kdx] + carry;
8702 // z[kdx] = (jlong)product;
8703
8704 movq(yz_idx, Address(y, idx, Address::times_4, offset));
8705 rorq(yz_idx, 32); // convert big-endian to little-endian
8706 movq(product, x_xstart);
8707 mulq(yz_idx); // product(rax) * yz_idx -> rdx:product(rax)
8708 movq(yz_idx, Address(z, idx, Address::times_4, offset));
8709 rorq(yz_idx, 32); // convert big-endian to little-endian
8710
8711 add2_with_carry(rdx, product, carry, yz_idx);
8712
8713 movl(Address(z, idx, Address::times_4, offset+4), product);
8714 shrq(product, 32);
8715 movl(Address(z, idx, Address::times_4, offset), product);
8716
8717 }
8718
8719 /**
8720 * Multiply 128 bit by 128 bit. Unrolled inner loop.
8721 */
8722 void MacroAssembler::multiply_128_x_128_loop(Register x_xstart, Register y, Register z,
8723 Register yz_idx, Register idx, Register jdx,
8724 Register carry, Register product,
8725 Register carry2) {
8726 // jlong carry, x[], y[], z[];
8727 // int kdx = ystart+1;
8728 // for (int idx=ystart-2; idx >= 0; idx -= 2) { // Third loop
8729 // huge_128 product = (y[idx+1] * x_xstart) + z[kdx+idx+1] + carry;
8730 // z[kdx+idx+1] = (jlong)product;
8731 // jlong carry2 = (jlong)(product >>> 64);
8732 // product = (y[idx] * x_xstart) + z[kdx+idx] + carry2;
8733 // z[kdx+idx] = (jlong)product;
8734 // carry = (jlong)(product >>> 64);
8735 // }
8736 // idx += 2;
8737 // if (idx > 0) {
8738 // product = (y[idx] * x_xstart) + z[kdx+idx] + carry;
8739 // z[kdx+idx] = (jlong)product;
8740 // carry = (jlong)(product >>> 64);
8741 // }
8742 //
8743
8744 Label L_third_loop, L_third_loop_exit, L_post_third_loop_done;
8745
8746 movl(jdx, idx);
8747 andl(jdx, 0xFFFFFFFC);
8748 shrl(jdx, 2);
8749
8750 bind(L_third_loop);
8751 subl(jdx, 1);
8752 jcc(Assembler::negative, L_third_loop_exit);
8753 subl(idx, 4);
8754
8755 multiply_add_128_x_128(x_xstart, y, z, yz_idx, idx, carry, product, 8);
8756 movq(carry2, rdx);
8757
8758 multiply_add_128_x_128(x_xstart, y, z, yz_idx, idx, carry2, product, 0);
8759 movq(carry, rdx);
8760 jmp(L_third_loop);
8761
8762 bind (L_third_loop_exit);
8763
8764 andl (idx, 0x3);
8765 jcc(Assembler::zero, L_post_third_loop_done);
8766
8767 Label L_check_1;
8768 subl(idx, 2);
8769 jcc(Assembler::negative, L_check_1);
8770
8771 multiply_add_128_x_128(x_xstart, y, z, yz_idx, idx, carry, product, 0);
8772 movq(carry, rdx);
8773
8774 bind (L_check_1);
8775 addl (idx, 0x2);
8776 andl (idx, 0x1);
8777 subl(idx, 1);
8778 jcc(Assembler::negative, L_post_third_loop_done);
8779
8780 movl(yz_idx, Address(y, idx, Address::times_4, 0));
8781 movq(product, x_xstart);
8782 mulq(yz_idx); // product(rax) * yz_idx -> rdx:product(rax)
8783 movl(yz_idx, Address(z, idx, Address::times_4, 0));
8784
8785 add2_with_carry(rdx, product, yz_idx, carry);
8786
8787 movl(Address(z, idx, Address::times_4, 0), product);
8788 shrq(product, 32);
8789
8790 shlq(rdx, 32);
8791 orq(product, rdx);
8792 movq(carry, product);
8793
8794 bind(L_post_third_loop_done);
8795 }
8796
8797 /**
8798 * Multiply 128 bit by 128 bit using BMI2. Unrolled inner loop.
8799 *
8800 */
8801 void MacroAssembler::multiply_128_x_128_bmi2_loop(Register y, Register z,
8802 Register carry, Register carry2,
8803 Register idx, Register jdx,
8804 Register yz_idx1, Register yz_idx2,
8805 Register tmp, Register tmp3, Register tmp4) {
8806 assert(UseBMI2Instructions, "should be used only when BMI2 is available");
8807
8808 // jlong carry, x[], y[], z[];
8809 // int kdx = ystart+1;
8810 // for (int idx=ystart-2; idx >= 0; idx -= 2) { // Third loop
8811 // huge_128 tmp3 = (y[idx+1] * rdx) + z[kdx+idx+1] + carry;
8812 // jlong carry2 = (jlong)(tmp3 >>> 64);
8813 // huge_128 tmp4 = (y[idx] * rdx) + z[kdx+idx] + carry2;
8814 // carry = (jlong)(tmp4 >>> 64);
8815 // z[kdx+idx+1] = (jlong)tmp3;
8816 // z[kdx+idx] = (jlong)tmp4;
8817 // }
8818 // idx += 2;
8819 // if (idx > 0) {
8820 // yz_idx1 = (y[idx] * rdx) + z[kdx+idx] + carry;
8821 // z[kdx+idx] = (jlong)yz_idx1;
8822 // carry = (jlong)(yz_idx1 >>> 64);
8823 // }
8824 //
8825
8826 Label L_third_loop, L_third_loop_exit, L_post_third_loop_done;
8827
8828 movl(jdx, idx);
8829 andl(jdx, 0xFFFFFFFC);
8830 shrl(jdx, 2);
8831
8832 bind(L_third_loop);
8833 subl(jdx, 1);
8834 jcc(Assembler::negative, L_third_loop_exit);
8835 subl(idx, 4);
8836
8837 movq(yz_idx1, Address(y, idx, Address::times_4, 8));
8838 rorxq(yz_idx1, yz_idx1, 32); // convert big-endian to little-endian
8839 movq(yz_idx2, Address(y, idx, Address::times_4, 0));
8840 rorxq(yz_idx2, yz_idx2, 32);
8841
8842 mulxq(tmp4, tmp3, yz_idx1); // yz_idx1 * rdx -> tmp4:tmp3
8843 mulxq(carry2, tmp, yz_idx2); // yz_idx2 * rdx -> carry2:tmp
8844
8845 movq(yz_idx1, Address(z, idx, Address::times_4, 8));
8846 rorxq(yz_idx1, yz_idx1, 32);
8847 movq(yz_idx2, Address(z, idx, Address::times_4, 0));
8848 rorxq(yz_idx2, yz_idx2, 32);
8849
8850 if (VM_Version::supports_adx()) {
8851 adcxq(tmp3, carry);
8852 adoxq(tmp3, yz_idx1);
8853
8854 adcxq(tmp4, tmp);
8855 adoxq(tmp4, yz_idx2);
8856
8857 movl(carry, 0); // does not affect flags
8858 adcxq(carry2, carry);
8859 adoxq(carry2, carry);
8860 } else {
8861 add2_with_carry(tmp4, tmp3, carry, yz_idx1);
8862 add2_with_carry(carry2, tmp4, tmp, yz_idx2);
8863 }
8864 movq(carry, carry2);
8865
8866 movl(Address(z, idx, Address::times_4, 12), tmp3);
8867 shrq(tmp3, 32);
8868 movl(Address(z, idx, Address::times_4, 8), tmp3);
8869
8870 movl(Address(z, idx, Address::times_4, 4), tmp4);
8871 shrq(tmp4, 32);
8872 movl(Address(z, idx, Address::times_4, 0), tmp4);
8873
8874 jmp(L_third_loop);
8875
8876 bind (L_third_loop_exit);
8877
8878 andl (idx, 0x3);
8879 jcc(Assembler::zero, L_post_third_loop_done);
8880
8881 Label L_check_1;
8882 subl(idx, 2);
8883 jcc(Assembler::negative, L_check_1);
8884
8885 movq(yz_idx1, Address(y, idx, Address::times_4, 0));
8886 rorxq(yz_idx1, yz_idx1, 32);
8887 mulxq(tmp4, tmp3, yz_idx1); // yz_idx1 * rdx -> tmp4:tmp3
8888 movq(yz_idx2, Address(z, idx, Address::times_4, 0));
8889 rorxq(yz_idx2, yz_idx2, 32);
8890
8891 add2_with_carry(tmp4, tmp3, carry, yz_idx2);
8892
8893 movl(Address(z, idx, Address::times_4, 4), tmp3);
8894 shrq(tmp3, 32);
8895 movl(Address(z, idx, Address::times_4, 0), tmp3);
8896 movq(carry, tmp4);
8897
8898 bind (L_check_1);
8899 addl (idx, 0x2);
8900 andl (idx, 0x1);
8901 subl(idx, 1);
8902 jcc(Assembler::negative, L_post_third_loop_done);
8903 movl(tmp4, Address(y, idx, Address::times_4, 0));
8904 mulxq(carry2, tmp3, tmp4); // tmp4 * rdx -> carry2:tmp3
8905 movl(tmp4, Address(z, idx, Address::times_4, 0));
8906
8907 add2_with_carry(carry2, tmp3, tmp4, carry);
8908
8909 movl(Address(z, idx, Address::times_4, 0), tmp3);
8910 shrq(tmp3, 32);
8911
8912 shlq(carry2, 32);
8913 orq(tmp3, carry2);
8914 movq(carry, tmp3);
8915
8916 bind(L_post_third_loop_done);
8917 }
8918
8919 /**
8920 * Code for BigInteger::multiplyToLen() instrinsic.
8921 *
8922 * rdi: x
8923 * rax: xlen
8924 * rsi: y
8925 * rcx: ylen
8926 * r8: z
8927 * r11: zlen
8928 * r12: tmp1
8929 * r13: tmp2
8930 * r14: tmp3
8931 * r15: tmp4
8932 * rbx: tmp5
8933 *
8934 */
8935 void MacroAssembler::multiply_to_len(Register x, Register xlen, Register y, Register ylen, Register z, Register zlen,
8936 Register tmp1, Register tmp2, Register tmp3, Register tmp4, Register tmp5) {
8937 ShortBranchVerifier sbv(this);
8938 assert_different_registers(x, xlen, y, ylen, z, zlen, tmp1, tmp2, tmp3, tmp4, tmp5, rdx);
8939
8940 push(tmp1);
8941 push(tmp2);
8942 push(tmp3);
8943 push(tmp4);
8944 push(tmp5);
8945
8946 push(xlen);
8947 push(zlen);
8948
8949 const Register idx = tmp1;
8950 const Register kdx = tmp2;
8951 const Register xstart = tmp3;
8952
8953 const Register y_idx = tmp4;
8954 const Register carry = tmp5;
8955 const Register product = xlen;
8956 const Register x_xstart = zlen; // reuse register
8957
8958 // First Loop.
8959 //
8960 // final static long LONG_MASK = 0xffffffffL;
8961 // int xstart = xlen - 1;
8962 // int ystart = ylen - 1;
8963 // long carry = 0;
8964 // for (int idx=ystart, kdx=ystart+1+xstart; idx >= 0; idx-, kdx--) {
8965 // long product = (y[idx] & LONG_MASK) * (x[xstart] & LONG_MASK) + carry;
8966 // z[kdx] = (int)product;
8967 // carry = product >>> 32;
8968 // }
8969 // z[xstart] = (int)carry;
8970 //
8971
8972 movl(idx, ylen); // idx = ylen;
8973 movl(kdx, zlen); // kdx = xlen+ylen;
8974 xorq(carry, carry); // carry = 0;
8975
8976 Label L_done;
8977
8978 movl(xstart, xlen);
8979 decrementl(xstart);
8980 jcc(Assembler::negative, L_done);
8981
8982 multiply_64_x_64_loop(x, xstart, x_xstart, y, y_idx, z, carry, product, idx, kdx);
8983
8984 Label L_second_loop;
8985 testl(kdx, kdx);
8986 jcc(Assembler::zero, L_second_loop);
8987
8988 Label L_carry;
8989 subl(kdx, 1);
8990 jcc(Assembler::zero, L_carry);
8991
8992 movl(Address(z, kdx, Address::times_4, 0), carry);
8993 shrq(carry, 32);
8994 subl(kdx, 1);
8995
8996 bind(L_carry);
8997 movl(Address(z, kdx, Address::times_4, 0), carry);
8998
8999 // Second and third (nested) loops.
9000 //
9001 // for (int i = xstart-1; i >= 0; i--) { // Second loop
9002 // carry = 0;
9003 // for (int jdx=ystart, k=ystart+1+i; jdx >= 0; jdx--, k--) { // Third loop
9004 // long product = (y[jdx] & LONG_MASK) * (x[i] & LONG_MASK) +
9005 // (z[k] & LONG_MASK) + carry;
9006 // z[k] = (int)product;
9007 // carry = product >>> 32;
9008 // }
9009 // z[i] = (int)carry;
9010 // }
9011 //
9012 // i = xlen, j = tmp1, k = tmp2, carry = tmp5, x[i] = rdx
9013
9014 const Register jdx = tmp1;
9015
9016 bind(L_second_loop);
9017 xorl(carry, carry); // carry = 0;
9018 movl(jdx, ylen); // j = ystart+1
9019
9020 subl(xstart, 1); // i = xstart-1;
9021 jcc(Assembler::negative, L_done);
9022
9023 push (z);
9024
9025 Label L_last_x;
9026 lea(z, Address(z, xstart, Address::times_4, 4)); // z = z + k - j
9027 subl(xstart, 1); // i = xstart-1;
9028 jcc(Assembler::negative, L_last_x);
9029
9030 if (UseBMI2Instructions) {
9031 movq(rdx, Address(x, xstart, Address::times_4, 0));
9032 rorxq(rdx, rdx, 32); // convert big-endian to little-endian
9033 } else {
9034 movq(x_xstart, Address(x, xstart, Address::times_4, 0));
9035 rorq(x_xstart, 32); // convert big-endian to little-endian
9036 }
9037
9038 Label L_third_loop_prologue;
9039 bind(L_third_loop_prologue);
9040
9041 push (x);
9042 push (xstart);
9043 push (ylen);
9044
9045
9046 if (UseBMI2Instructions) {
9047 multiply_128_x_128_bmi2_loop(y, z, carry, x, jdx, ylen, product, tmp2, x_xstart, tmp3, tmp4);
9048 } else { // !UseBMI2Instructions
9049 multiply_128_x_128_loop(x_xstart, y, z, y_idx, jdx, ylen, carry, product, x);
9050 }
9051
9052 pop(ylen);
9053 pop(xlen);
9054 pop(x);
9055 pop(z);
9056
9057 movl(tmp3, xlen);
9058 addl(tmp3, 1);
9059 movl(Address(z, tmp3, Address::times_4, 0), carry);
9060 subl(tmp3, 1);
9061 jccb(Assembler::negative, L_done);
9062
9063 shrq(carry, 32);
9064 movl(Address(z, tmp3, Address::times_4, 0), carry);
9065 jmp(L_second_loop);
9066
9067 // Next infrequent code is moved outside loops.
9068 bind(L_last_x);
9069 if (UseBMI2Instructions) {
9070 movl(rdx, Address(x, 0));
9071 } else {
9072 movl(x_xstart, Address(x, 0));
9073 }
9074 jmp(L_third_loop_prologue);
9075
9076 bind(L_done);
9077
9078 pop(zlen);
9079 pop(xlen);
9080
9081 pop(tmp5);
9082 pop(tmp4);
9083 pop(tmp3);
9084 pop(tmp2);
9085 pop(tmp1);
9086 }
9087
9088 void MacroAssembler::vectorized_mismatch(Register obja, Register objb, Register length, Register log2_array_indxscale,
9089 Register result, Register tmp1, Register tmp2, XMMRegister rymm0, XMMRegister rymm1, XMMRegister rymm2){
9090 assert(UseSSE42Intrinsics, "SSE4.2 must be enabled.");
9091 Label VECTOR64_LOOP, VECTOR64_TAIL, VECTOR64_NOT_EQUAL, VECTOR32_TAIL;
9092 Label VECTOR32_LOOP, VECTOR16_LOOP, VECTOR8_LOOP, VECTOR4_LOOP;
9093 Label VECTOR16_TAIL, VECTOR8_TAIL, VECTOR4_TAIL;
9094 Label VECTOR32_NOT_EQUAL, VECTOR16_NOT_EQUAL, VECTOR8_NOT_EQUAL, VECTOR4_NOT_EQUAL;
9095 Label SAME_TILL_END, DONE;
9096 Label BYTES_LOOP, BYTES_TAIL, BYTES_NOT_EQUAL;
9097
9098 //scale is in rcx in both Win64 and Unix
9099 ShortBranchVerifier sbv(this);
9100
9101 shlq(length);
9102 xorq(result, result);
9103
9104 if ((UseAVX > 2) &&
9105 VM_Version::supports_avx512vlbw()) {
9106 set_vector_masking(); // opening of the stub context for programming mask registers
9107 cmpq(length, 64);
9108 jcc(Assembler::less, VECTOR32_TAIL);
9109 movq(tmp1, length);
9110 andq(tmp1, 0x3F); // tail count
9111 andq(length, ~(0x3F)); //vector count
9112
9113 bind(VECTOR64_LOOP);
9114 // AVX512 code to compare 64 byte vectors.
9115 evmovdqub(rymm0, Address(obja, result), Assembler::AVX_512bit);
9116 evpcmpeqb(k7, rymm0, Address(objb, result), Assembler::AVX_512bit);
9117 kortestql(k7, k7);
9118 jcc(Assembler::aboveEqual, VECTOR64_NOT_EQUAL); // mismatch
9119 addq(result, 64);
9120 subq(length, 64);
9121 jccb(Assembler::notZero, VECTOR64_LOOP);
9122
9123 //bind(VECTOR64_TAIL);
9124 testq(tmp1, tmp1);
9125 jcc(Assembler::zero, SAME_TILL_END);
9126
9127 bind(VECTOR64_TAIL);
9128 // AVX512 code to compare upto 63 byte vectors.
9129 // Save k1
9130 kmovql(k3, k1);
9131 mov64(tmp2, 0xFFFFFFFFFFFFFFFF);
9132 shlxq(tmp2, tmp2, tmp1);
9133 notq(tmp2);
9134 kmovql(k1, tmp2);
9135
9136 evmovdqub(rymm0, k1, Address(obja, result), Assembler::AVX_512bit);
9137 evpcmpeqb(k7, k1, rymm0, Address(objb, result), Assembler::AVX_512bit);
9138
9139 ktestql(k7, k1);
9140 // Restore k1
9141 kmovql(k1, k3);
9142 jcc(Assembler::below, SAME_TILL_END); // not mismatch
9143
9144 bind(VECTOR64_NOT_EQUAL);
9145 kmovql(tmp1, k7);
9146 notq(tmp1);
9147 tzcntq(tmp1, tmp1);
9148 addq(result, tmp1);
9149 shrq(result);
9150 jmp(DONE);
9151 bind(VECTOR32_TAIL);
9152 clear_vector_masking(); // closing of the stub context for programming mask registers
9153 }
9154
9155 cmpq(length, 8);
9156 jcc(Assembler::equal, VECTOR8_LOOP);
9157 jcc(Assembler::less, VECTOR4_TAIL);
9158
9159 if (UseAVX >= 2) {
9160
9161 cmpq(length, 16);
9162 jcc(Assembler::equal, VECTOR16_LOOP);
9163 jcc(Assembler::less, VECTOR8_LOOP);
9164
9165 cmpq(length, 32);
9166 jccb(Assembler::less, VECTOR16_TAIL);
9167
9168 subq(length, 32);
9169 bind(VECTOR32_LOOP);
9170 vmovdqu(rymm0, Address(obja, result));
9171 vmovdqu(rymm1, Address(objb, result));
9172 vpxor(rymm2, rymm0, rymm1, Assembler::AVX_256bit);
9173 vptest(rymm2, rymm2);
9174 jcc(Assembler::notZero, VECTOR32_NOT_EQUAL);//mismatch found
9175 addq(result, 32);
9176 subq(length, 32);
9177 jccb(Assembler::greaterEqual, VECTOR32_LOOP);
9178 addq(length, 32);
9179 jcc(Assembler::equal, SAME_TILL_END);
9180 //falling through if less than 32 bytes left //close the branch here.
9181
9182 bind(VECTOR16_TAIL);
9183 cmpq(length, 16);
9184 jccb(Assembler::less, VECTOR8_TAIL);
9185 bind(VECTOR16_LOOP);
9186 movdqu(rymm0, Address(obja, result));
9187 movdqu(rymm1, Address(objb, result));
9188 vpxor(rymm2, rymm0, rymm1, Assembler::AVX_128bit);
9189 ptest(rymm2, rymm2);
9190 jcc(Assembler::notZero, VECTOR16_NOT_EQUAL);//mismatch found
9191 addq(result, 16);
9192 subq(length, 16);
9193 jcc(Assembler::equal, SAME_TILL_END);
9194 //falling through if less than 16 bytes left
9195 } else {//regular intrinsics
9196
9197 cmpq(length, 16);
9198 jccb(Assembler::less, VECTOR8_TAIL);
9199
9200 subq(length, 16);
9201 bind(VECTOR16_LOOP);
9202 movdqu(rymm0, Address(obja, result));
9203 movdqu(rymm1, Address(objb, result));
9204 pxor(rymm0, rymm1);
9205 ptest(rymm0, rymm0);
9206 jcc(Assembler::notZero, VECTOR16_NOT_EQUAL);//mismatch found
9207 addq(result, 16);
9208 subq(length, 16);
9209 jccb(Assembler::greaterEqual, VECTOR16_LOOP);
9210 addq(length, 16);
9211 jcc(Assembler::equal, SAME_TILL_END);
9212 //falling through if less than 16 bytes left
9213 }
9214
9215 bind(VECTOR8_TAIL);
9216 cmpq(length, 8);
9217 jccb(Assembler::less, VECTOR4_TAIL);
9218 bind(VECTOR8_LOOP);
9219 movq(tmp1, Address(obja, result));
9220 movq(tmp2, Address(objb, result));
9221 xorq(tmp1, tmp2);
9222 testq(tmp1, tmp1);
9223 jcc(Assembler::notZero, VECTOR8_NOT_EQUAL);//mismatch found
9224 addq(result, 8);
9225 subq(length, 8);
9226 jcc(Assembler::equal, SAME_TILL_END);
9227 //falling through if less than 8 bytes left
9228
9229 bind(VECTOR4_TAIL);
9230 cmpq(length, 4);
9231 jccb(Assembler::less, BYTES_TAIL);
9232 bind(VECTOR4_LOOP);
9233 movl(tmp1, Address(obja, result));
9234 xorl(tmp1, Address(objb, result));
9235 testl(tmp1, tmp1);
9236 jcc(Assembler::notZero, VECTOR4_NOT_EQUAL);//mismatch found
9237 addq(result, 4);
9238 subq(length, 4);
9239 jcc(Assembler::equal, SAME_TILL_END);
9240 //falling through if less than 4 bytes left
9241
9242 bind(BYTES_TAIL);
9243 bind(BYTES_LOOP);
9244 load_unsigned_byte(tmp1, Address(obja, result));
9245 load_unsigned_byte(tmp2, Address(objb, result));
9246 xorl(tmp1, tmp2);
9247 testl(tmp1, tmp1);
9248 jccb(Assembler::notZero, BYTES_NOT_EQUAL);//mismatch found
9249 decq(length);
9250 jccb(Assembler::zero, SAME_TILL_END);
9251 incq(result);
9252 load_unsigned_byte(tmp1, Address(obja, result));
9253 load_unsigned_byte(tmp2, Address(objb, result));
9254 xorl(tmp1, tmp2);
9255 testl(tmp1, tmp1);
9256 jccb(Assembler::notZero, BYTES_NOT_EQUAL);//mismatch found
9257 decq(length);
9258 jccb(Assembler::zero, SAME_TILL_END);
9259 incq(result);
9260 load_unsigned_byte(tmp1, Address(obja, result));
9261 load_unsigned_byte(tmp2, Address(objb, result));
9262 xorl(tmp1, tmp2);
9263 testl(tmp1, tmp1);
9264 jccb(Assembler::notZero, BYTES_NOT_EQUAL);//mismatch found
9265 jmpb(SAME_TILL_END);
9266
9267 if (UseAVX >= 2) {
9268 bind(VECTOR32_NOT_EQUAL);
9269 vpcmpeqb(rymm2, rymm2, rymm2, Assembler::AVX_256bit);
9270 vpcmpeqb(rymm0, rymm0, rymm1, Assembler::AVX_256bit);
9271 vpxor(rymm0, rymm0, rymm2, Assembler::AVX_256bit);
9272 vpmovmskb(tmp1, rymm0);
9273 bsfq(tmp1, tmp1);
9274 addq(result, tmp1);
9275 shrq(result);
9276 jmpb(DONE);
9277 }
9278
9279 bind(VECTOR16_NOT_EQUAL);
9280 if (UseAVX >= 2) {
9281 vpcmpeqb(rymm2, rymm2, rymm2, Assembler::AVX_128bit);
9282 vpcmpeqb(rymm0, rymm0, rymm1, Assembler::AVX_128bit);
9283 pxor(rymm0, rymm2);
9284 } else {
9285 pcmpeqb(rymm2, rymm2);
9286 pxor(rymm0, rymm1);
9287 pcmpeqb(rymm0, rymm1);
9288 pxor(rymm0, rymm2);
9289 }
9290 pmovmskb(tmp1, rymm0);
9291 bsfq(tmp1, tmp1);
9292 addq(result, tmp1);
9293 shrq(result);
9294 jmpb(DONE);
9295
9296 bind(VECTOR8_NOT_EQUAL);
9297 bind(VECTOR4_NOT_EQUAL);
9298 bsfq(tmp1, tmp1);
9299 shrq(tmp1, 3);
9300 addq(result, tmp1);
9301 bind(BYTES_NOT_EQUAL);
9302 shrq(result);
9303 jmpb(DONE);
9304
9305 bind(SAME_TILL_END);
9306 mov64(result, -1);
9307
9308 bind(DONE);
9309 }
9310
9311 //Helper functions for square_to_len()
9312
9313 /**
9314 * Store the squares of x[], right shifted one bit (divided by 2) into z[]
9315 * Preserves x and z and modifies rest of the registers.
9316 */
9317 void MacroAssembler::square_rshift(Register x, Register xlen, Register z, Register tmp1, Register tmp3, Register tmp4, Register tmp5, Register rdxReg, Register raxReg) {
9318 // Perform square and right shift by 1
9319 // Handle odd xlen case first, then for even xlen do the following
9320 // jlong carry = 0;
9321 // for (int j=0, i=0; j < xlen; j+=2, i+=4) {
9322 // huge_128 product = x[j:j+1] * x[j:j+1];
9323 // z[i:i+1] = (carry << 63) | (jlong)(product >>> 65);
9324 // z[i+2:i+3] = (jlong)(product >>> 1);
9325 // carry = (jlong)product;
9326 // }
9327
9328 xorq(tmp5, tmp5); // carry
9329 xorq(rdxReg, rdxReg);
9330 xorl(tmp1, tmp1); // index for x
9331 xorl(tmp4, tmp4); // index for z
9332
9333 Label L_first_loop, L_first_loop_exit;
9334
9335 testl(xlen, 1);
9336 jccb(Assembler::zero, L_first_loop); //jump if xlen is even
9337
9338 // Square and right shift by 1 the odd element using 32 bit multiply
9339 movl(raxReg, Address(x, tmp1, Address::times_4, 0));
9340 imulq(raxReg, raxReg);
9341 shrq(raxReg, 1);
9342 adcq(tmp5, 0);
9343 movq(Address(z, tmp4, Address::times_4, 0), raxReg);
9344 incrementl(tmp1);
9345 addl(tmp4, 2);
9346
9347 // Square and right shift by 1 the rest using 64 bit multiply
9348 bind(L_first_loop);
9349 cmpptr(tmp1, xlen);
9350 jccb(Assembler::equal, L_first_loop_exit);
9351
9352 // Square
9353 movq(raxReg, Address(x, tmp1, Address::times_4, 0));
9354 rorq(raxReg, 32); // convert big-endian to little-endian
9355 mulq(raxReg); // 64-bit multiply rax * rax -> rdx:rax
9356
9357 // Right shift by 1 and save carry
9358 shrq(tmp5, 1); // rdx:rax:tmp5 = (tmp5:rdx:rax) >>> 1
9359 rcrq(rdxReg, 1);
9360 rcrq(raxReg, 1);
9361 adcq(tmp5, 0);
9362
9363 // Store result in z
9364 movq(Address(z, tmp4, Address::times_4, 0), rdxReg);
9365 movq(Address(z, tmp4, Address::times_4, 8), raxReg);
9366
9367 // Update indices for x and z
9368 addl(tmp1, 2);
9369 addl(tmp4, 4);
9370 jmp(L_first_loop);
9371
9372 bind(L_first_loop_exit);
9373 }
9374
9375
9376 /**
9377 * Perform the following multiply add operation using BMI2 instructions
9378 * carry:sum = sum + op1*op2 + carry
9379 * op2 should be in rdx
9380 * op2 is preserved, all other registers are modified
9381 */
9382 void MacroAssembler::multiply_add_64_bmi2(Register sum, Register op1, Register op2, Register carry, Register tmp2) {
9383 // assert op2 is rdx
9384 mulxq(tmp2, op1, op1); // op1 * op2 -> tmp2:op1
9385 addq(sum, carry);
9386 adcq(tmp2, 0);
9387 addq(sum, op1);
9388 adcq(tmp2, 0);
9389 movq(carry, tmp2);
9390 }
9391
9392 /**
9393 * Perform the following multiply add operation:
9394 * carry:sum = sum + op1*op2 + carry
9395 * Preserves op1, op2 and modifies rest of registers
9396 */
9397 void MacroAssembler::multiply_add_64(Register sum, Register op1, Register op2, Register carry, Register rdxReg, Register raxReg) {
9398 // rdx:rax = op1 * op2
9399 movq(raxReg, op2);
9400 mulq(op1);
9401
9402 // rdx:rax = sum + carry + rdx:rax
9403 addq(sum, carry);
9404 adcq(rdxReg, 0);
9405 addq(sum, raxReg);
9406 adcq(rdxReg, 0);
9407
9408 // carry:sum = rdx:sum
9409 movq(carry, rdxReg);
9410 }
9411
9412 /**
9413 * Add 64 bit long carry into z[] with carry propogation.
9414 * Preserves z and carry register values and modifies rest of registers.
9415 *
9416 */
9417 void MacroAssembler::add_one_64(Register z, Register zlen, Register carry, Register tmp1) {
9418 Label L_fourth_loop, L_fourth_loop_exit;
9419
9420 movl(tmp1, 1);
9421 subl(zlen, 2);
9422 addq(Address(z, zlen, Address::times_4, 0), carry);
9423
9424 bind(L_fourth_loop);
9425 jccb(Assembler::carryClear, L_fourth_loop_exit);
9426 subl(zlen, 2);
9427 jccb(Assembler::negative, L_fourth_loop_exit);
9428 addq(Address(z, zlen, Address::times_4, 0), tmp1);
9429 jmp(L_fourth_loop);
9430 bind(L_fourth_loop_exit);
9431 }
9432
9433 /**
9434 * Shift z[] left by 1 bit.
9435 * Preserves x, len, z and zlen registers and modifies rest of the registers.
9436 *
9437 */
9438 void MacroAssembler::lshift_by_1(Register x, Register len, Register z, Register zlen, Register tmp1, Register tmp2, Register tmp3, Register tmp4) {
9439
9440 Label L_fifth_loop, L_fifth_loop_exit;
9441
9442 // Fifth loop
9443 // Perform primitiveLeftShift(z, zlen, 1)
9444
9445 const Register prev_carry = tmp1;
9446 const Register new_carry = tmp4;
9447 const Register value = tmp2;
9448 const Register zidx = tmp3;
9449
9450 // int zidx, carry;
9451 // long value;
9452 // carry = 0;
9453 // for (zidx = zlen-2; zidx >=0; zidx -= 2) {
9454 // (carry:value) = (z[i] << 1) | carry ;
9455 // z[i] = value;
9456 // }
9457
9458 movl(zidx, zlen);
9459 xorl(prev_carry, prev_carry); // clear carry flag and prev_carry register
9460
9461 bind(L_fifth_loop);
9462 decl(zidx); // Use decl to preserve carry flag
9463 decl(zidx);
9464 jccb(Assembler::negative, L_fifth_loop_exit);
9465
9466 if (UseBMI2Instructions) {
9467 movq(value, Address(z, zidx, Address::times_4, 0));
9468 rclq(value, 1);
9469 rorxq(value, value, 32);
9470 movq(Address(z, zidx, Address::times_4, 0), value); // Store back in big endian form
9471 }
9472 else {
9473 // clear new_carry
9474 xorl(new_carry, new_carry);
9475
9476 // Shift z[i] by 1, or in previous carry and save new carry
9477 movq(value, Address(z, zidx, Address::times_4, 0));
9478 shlq(value, 1);
9479 adcl(new_carry, 0);
9480
9481 orq(value, prev_carry);
9482 rorq(value, 0x20);
9483 movq(Address(z, zidx, Address::times_4, 0), value); // Store back in big endian form
9484
9485 // Set previous carry = new carry
9486 movl(prev_carry, new_carry);
9487 }
9488 jmp(L_fifth_loop);
9489
9490 bind(L_fifth_loop_exit);
9491 }
9492
9493
9494 /**
9495 * Code for BigInteger::squareToLen() intrinsic
9496 *
9497 * rdi: x
9498 * rsi: len
9499 * r8: z
9500 * rcx: zlen
9501 * r12: tmp1
9502 * r13: tmp2
9503 * r14: tmp3
9504 * r15: tmp4
9505 * rbx: tmp5
9506 *
9507 */
9508 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) {
9509
9510 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;
9511 push(tmp1);
9512 push(tmp2);
9513 push(tmp3);
9514 push(tmp4);
9515 push(tmp5);
9516
9517 // First loop
9518 // Store the squares, right shifted one bit (i.e., divided by 2).
9519 square_rshift(x, len, z, tmp1, tmp3, tmp4, tmp5, rdxReg, raxReg);
9520
9521 // Add in off-diagonal sums.
9522 //
9523 // Second, third (nested) and fourth loops.
9524 // zlen +=2;
9525 // for (int xidx=len-2,zidx=zlen-4; xidx > 0; xidx-=2,zidx-=4) {
9526 // carry = 0;
9527 // long op2 = x[xidx:xidx+1];
9528 // for (int j=xidx-2,k=zidx; j >= 0; j-=2) {
9529 // k -= 2;
9530 // long op1 = x[j:j+1];
9531 // long sum = z[k:k+1];
9532 // carry:sum = multiply_add_64(sum, op1, op2, carry, tmp_regs);
9533 // z[k:k+1] = sum;
9534 // }
9535 // add_one_64(z, k, carry, tmp_regs);
9536 // }
9537
9538 const Register carry = tmp5;
9539 const Register sum = tmp3;
9540 const Register op1 = tmp4;
9541 Register op2 = tmp2;
9542
9543 push(zlen);
9544 push(len);
9545 addl(zlen,2);
9546 bind(L_second_loop);
9547 xorq(carry, carry);
9548 subl(zlen, 4);
9549 subl(len, 2);
9550 push(zlen);
9551 push(len);
9552 cmpl(len, 0);
9553 jccb(Assembler::lessEqual, L_second_loop_exit);
9554
9555 // Multiply an array by one 64 bit long.
9556 if (UseBMI2Instructions) {
9557 op2 = rdxReg;
9558 movq(op2, Address(x, len, Address::times_4, 0));
9559 rorxq(op2, op2, 32);
9560 }
9561 else {
9562 movq(op2, Address(x, len, Address::times_4, 0));
9563 rorq(op2, 32);
9564 }
9565
9566 bind(L_third_loop);
9567 decrementl(len);
9568 jccb(Assembler::negative, L_third_loop_exit);
9569 decrementl(len);
9570 jccb(Assembler::negative, L_last_x);
9571
9572 movq(op1, Address(x, len, Address::times_4, 0));
9573 rorq(op1, 32);
9574
9575 bind(L_multiply);
9576 subl(zlen, 2);
9577 movq(sum, Address(z, zlen, Address::times_4, 0));
9578
9579 // Multiply 64 bit by 64 bit and add 64 bits lower half and upper 64 bits as carry.
9580 if (UseBMI2Instructions) {
9581 multiply_add_64_bmi2(sum, op1, op2, carry, tmp2);
9582 }
9583 else {
9584 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg);
9585 }
9586
9587 movq(Address(z, zlen, Address::times_4, 0), sum);
9588
9589 jmp(L_third_loop);
9590 bind(L_third_loop_exit);
9591
9592 // Fourth loop
9593 // Add 64 bit long carry into z with carry propogation.
9594 // Uses offsetted zlen.
9595 add_one_64(z, zlen, carry, tmp1);
9596
9597 pop(len);
9598 pop(zlen);
9599 jmp(L_second_loop);
9600
9601 // Next infrequent code is moved outside loops.
9602 bind(L_last_x);
9603 movl(op1, Address(x, 0));
9604 jmp(L_multiply);
9605
9606 bind(L_second_loop_exit);
9607 pop(len);
9608 pop(zlen);
9609 pop(len);
9610 pop(zlen);
9611
9612 // Fifth loop
9613 // Shift z left 1 bit.
9614 lshift_by_1(x, len, z, zlen, tmp1, tmp2, tmp3, tmp4);
9615
9616 // z[zlen-1] |= x[len-1] & 1;
9617 movl(tmp3, Address(x, len, Address::times_4, -4));
9618 andl(tmp3, 1);
9619 orl(Address(z, zlen, Address::times_4, -4), tmp3);
9620
9621 pop(tmp5);
9622 pop(tmp4);
9623 pop(tmp3);
9624 pop(tmp2);
9625 pop(tmp1);
9626 }
9627
9628 /**
9629 * Helper function for mul_add()
9630 * Multiply the in[] by int k and add to out[] starting at offset offs using
9631 * 128 bit by 32 bit multiply and return the carry in tmp5.
9632 * Only quad int aligned length of in[] is operated on in this function.
9633 * k is in rdxReg for BMI2Instructions, for others it is in tmp2.
9634 * This function preserves out, in and k registers.
9635 * len and offset point to the appropriate index in "in" & "out" correspondingly
9636 * tmp5 has the carry.
9637 * other registers are temporary and are modified.
9638 *
9639 */
9640 void MacroAssembler::mul_add_128_x_32_loop(Register out, Register in,
9641 Register offset, Register len, Register tmp1, Register tmp2, Register tmp3,
9642 Register tmp4, Register tmp5, Register rdxReg, Register raxReg) {
9643
9644 Label L_first_loop, L_first_loop_exit;
9645
9646 movl(tmp1, len);
9647 shrl(tmp1, 2);
9648
9649 bind(L_first_loop);
9650 subl(tmp1, 1);
9651 jccb(Assembler::negative, L_first_loop_exit);
9652
9653 subl(len, 4);
9654 subl(offset, 4);
9655
9656 Register op2 = tmp2;
9657 const Register sum = tmp3;
9658 const Register op1 = tmp4;
9659 const Register carry = tmp5;
9660
9661 if (UseBMI2Instructions) {
9662 op2 = rdxReg;
9663 }
9664
9665 movq(op1, Address(in, len, Address::times_4, 8));
9666 rorq(op1, 32);
9667 movq(sum, Address(out, offset, Address::times_4, 8));
9668 rorq(sum, 32);
9669 if (UseBMI2Instructions) {
9670 multiply_add_64_bmi2(sum, op1, op2, carry, raxReg);
9671 }
9672 else {
9673 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg);
9674 }
9675 // Store back in big endian from little endian
9676 rorq(sum, 0x20);
9677 movq(Address(out, offset, Address::times_4, 8), sum);
9678
9679 movq(op1, Address(in, len, Address::times_4, 0));
9680 rorq(op1, 32);
9681 movq(sum, Address(out, offset, Address::times_4, 0));
9682 rorq(sum, 32);
9683 if (UseBMI2Instructions) {
9684 multiply_add_64_bmi2(sum, op1, op2, carry, raxReg);
9685 }
9686 else {
9687 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg);
9688 }
9689 // Store back in big endian from little endian
9690 rorq(sum, 0x20);
9691 movq(Address(out, offset, Address::times_4, 0), sum);
9692
9693 jmp(L_first_loop);
9694 bind(L_first_loop_exit);
9695 }
9696
9697 /**
9698 * Code for BigInteger::mulAdd() intrinsic
9699 *
9700 * rdi: out
9701 * rsi: in
9702 * r11: offs (out.length - offset)
9703 * rcx: len
9704 * r8: k
9705 * r12: tmp1
9706 * r13: tmp2
9707 * r14: tmp3
9708 * r15: tmp4
9709 * rbx: tmp5
9710 * Multiply the in[] by word k and add to out[], return the carry in rax
9711 */
9712 void MacroAssembler::mul_add(Register out, Register in, Register offs,
9713 Register len, Register k, Register tmp1, Register tmp2, Register tmp3,
9714 Register tmp4, Register tmp5, Register rdxReg, Register raxReg) {
9715
9716 Label L_carry, L_last_in, L_done;
9717
9718 // carry = 0;
9719 // for (int j=len-1; j >= 0; j--) {
9720 // long product = (in[j] & LONG_MASK) * kLong +
9721 // (out[offs] & LONG_MASK) + carry;
9722 // out[offs--] = (int)product;
9723 // carry = product >>> 32;
9724 // }
9725 //
9726 push(tmp1);
9727 push(tmp2);
9728 push(tmp3);
9729 push(tmp4);
9730 push(tmp5);
9731
9732 Register op2 = tmp2;
9733 const Register sum = tmp3;
9734 const Register op1 = tmp4;
9735 const Register carry = tmp5;
9736
9737 if (UseBMI2Instructions) {
9738 op2 = rdxReg;
9739 movl(op2, k);
9740 }
9741 else {
9742 movl(op2, k);
9743 }
9744
9745 xorq(carry, carry);
9746
9747 //First loop
9748
9749 //Multiply in[] by k in a 4 way unrolled loop using 128 bit by 32 bit multiply
9750 //The carry is in tmp5
9751 mul_add_128_x_32_loop(out, in, offs, len, tmp1, tmp2, tmp3, tmp4, tmp5, rdxReg, raxReg);
9752
9753 //Multiply the trailing in[] entry using 64 bit by 32 bit, if any
9754 decrementl(len);
9755 jccb(Assembler::negative, L_carry);
9756 decrementl(len);
9757 jccb(Assembler::negative, L_last_in);
9758
9759 movq(op1, Address(in, len, Address::times_4, 0));
9760 rorq(op1, 32);
9761
9762 subl(offs, 2);
9763 movq(sum, Address(out, offs, Address::times_4, 0));
9764 rorq(sum, 32);
9765
9766 if (UseBMI2Instructions) {
9767 multiply_add_64_bmi2(sum, op1, op2, carry, raxReg);
9768 }
9769 else {
9770 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg);
9771 }
9772
9773 // Store back in big endian from little endian
9774 rorq(sum, 0x20);
9775 movq(Address(out, offs, Address::times_4, 0), sum);
9776
9777 testl(len, len);
9778 jccb(Assembler::zero, L_carry);
9779
9780 //Multiply the last in[] entry, if any
9781 bind(L_last_in);
9782 movl(op1, Address(in, 0));
9783 movl(sum, Address(out, offs, Address::times_4, -4));
9784
9785 movl(raxReg, k);
9786 mull(op1); //tmp4 * eax -> edx:eax
9787 addl(sum, carry);
9788 adcl(rdxReg, 0);
9789 addl(sum, raxReg);
9790 adcl(rdxReg, 0);
9791 movl(carry, rdxReg);
9792
9793 movl(Address(out, offs, Address::times_4, -4), sum);
9794
9795 bind(L_carry);
9796 //return tmp5/carry as carry in rax
9797 movl(rax, carry);
9798
9799 bind(L_done);
9800 pop(tmp5);
9801 pop(tmp4);
9802 pop(tmp3);
9803 pop(tmp2);
9804 pop(tmp1);
9805 }
9806 #endif
9807
9808 /**
9809 * Emits code to update CRC-32 with a byte value according to constants in table
9810 *
9811 * @param [in,out]crc Register containing the crc.
9812 * @param [in]val Register containing the byte to fold into the CRC.
9813 * @param [in]table Register containing the table of crc constants.
9814 *
9815 * uint32_t crc;
9816 * val = crc_table[(val ^ crc) & 0xFF];
9817 * crc = val ^ (crc >> 8);
9818 *
9819 */
9820 void MacroAssembler::update_byte_crc32(Register crc, Register val, Register table) {
9821 xorl(val, crc);
9822 andl(val, 0xFF);
9823 shrl(crc, 8); // unsigned shift
9824 xorl(crc, Address(table, val, Address::times_4, 0));
9825 }
9826
9827 /**
9828 * Fold four 128-bit data chunks
9829 */
9830 void MacroAssembler::fold_128bit_crc32_avx512(XMMRegister xcrc, XMMRegister xK, XMMRegister xtmp, Register buf, int offset) {
9831 evpclmulhdq(xtmp, xK, xcrc, Assembler::AVX_512bit); // [123:64]
9832 evpclmulldq(xcrc, xK, xcrc, Assembler::AVX_512bit); // [63:0]
9833 evpxorq(xcrc, xcrc, Address(buf, offset), Assembler::AVX_512bit /* vector_len */);
9834 evpxorq(xcrc, xcrc, xtmp, Assembler::AVX_512bit /* vector_len */);
9835 }
9836
9837 /**
9838 * Fold 128-bit data chunk
9839 */
9840 void MacroAssembler::fold_128bit_crc32(XMMRegister xcrc, XMMRegister xK, XMMRegister xtmp, Register buf, int offset) {
9841 if (UseAVX > 0) {
9842 vpclmulhdq(xtmp, xK, xcrc); // [123:64]
9843 vpclmulldq(xcrc, xK, xcrc); // [63:0]
9844 vpxor(xcrc, xcrc, Address(buf, offset), 0 /* vector_len */);
9845 pxor(xcrc, xtmp);
9846 } else {
9847 movdqa(xtmp, xcrc);
9848 pclmulhdq(xtmp, xK); // [123:64]
9849 pclmulldq(xcrc, xK); // [63:0]
9850 pxor(xcrc, xtmp);
9851 movdqu(xtmp, Address(buf, offset));
9852 pxor(xcrc, xtmp);
9853 }
9854 }
9855
9856 void MacroAssembler::fold_128bit_crc32(XMMRegister xcrc, XMMRegister xK, XMMRegister xtmp, XMMRegister xbuf) {
9857 if (UseAVX > 0) {
9858 vpclmulhdq(xtmp, xK, xcrc);
9859 vpclmulldq(xcrc, xK, xcrc);
9860 pxor(xcrc, xbuf);
9861 pxor(xcrc, xtmp);
9862 } else {
9863 movdqa(xtmp, xcrc);
9864 pclmulhdq(xtmp, xK);
9865 pclmulldq(xcrc, xK);
9866 pxor(xcrc, xbuf);
9867 pxor(xcrc, xtmp);
9868 }
9869 }
9870
9871 /**
9872 * 8-bit folds to compute 32-bit CRC
9873 *
9874 * uint64_t xcrc;
9875 * timesXtoThe32[xcrc & 0xFF] ^ (xcrc >> 8);
9876 */
9877 void MacroAssembler::fold_8bit_crc32(XMMRegister xcrc, Register table, XMMRegister xtmp, Register tmp) {
9878 movdl(tmp, xcrc);
9879 andl(tmp, 0xFF);
9880 movdl(xtmp, Address(table, tmp, Address::times_4, 0));
9881 psrldq(xcrc, 1); // unsigned shift one byte
9882 pxor(xcrc, xtmp);
9883 }
9884
9885 /**
9886 * uint32_t crc;
9887 * timesXtoThe32[crc & 0xFF] ^ (crc >> 8);
9888 */
9889 void MacroAssembler::fold_8bit_crc32(Register crc, Register table, Register tmp) {
9890 movl(tmp, crc);
9891 andl(tmp, 0xFF);
9892 shrl(crc, 8);
9893 xorl(crc, Address(table, tmp, Address::times_4, 0));
9894 }
9895
9896 /**
9897 * @param crc register containing existing CRC (32-bit)
9898 * @param buf register pointing to input byte buffer (byte*)
9899 * @param len register containing number of bytes
9900 * @param table register that will contain address of CRC table
9901 * @param tmp scratch register
9902 */
9903 void MacroAssembler::kernel_crc32(Register crc, Register buf, Register len, Register table, Register tmp) {
9904 assert_different_registers(crc, buf, len, table, tmp, rax);
9905
9906 Label L_tail, L_tail_restore, L_tail_loop, L_exit, L_align_loop, L_aligned;
9907 Label L_fold_tail, L_fold_128b, L_fold_512b, L_fold_512b_loop, L_fold_tail_loop;
9908
9909 // For EVEX with VL and BW, provide a standard mask, VL = 128 will guide the merge
9910 // context for the registers used, where all instructions below are using 128-bit mode
9911 // On EVEX without VL and BW, these instructions will all be AVX.
9912 if (VM_Version::supports_avx512vlbw()) {
9913 movl(tmp, 0xffff);
9914 kmovwl(k1, tmp);
9915 }
9916
9917 lea(table, ExternalAddress(StubRoutines::crc_table_addr()));
9918 notl(crc); // ~crc
9919 cmpl(len, 16);
9920 jcc(Assembler::less, L_tail);
9921
9922 // Align buffer to 16 bytes
9923 movl(tmp, buf);
9924 andl(tmp, 0xF);
9925 jccb(Assembler::zero, L_aligned);
9926 subl(tmp, 16);
9927 addl(len, tmp);
9928
9929 align(4);
9930 BIND(L_align_loop);
9931 movsbl(rax, Address(buf, 0)); // load byte with sign extension
9932 update_byte_crc32(crc, rax, table);
9933 increment(buf);
9934 incrementl(tmp);
9935 jccb(Assembler::less, L_align_loop);
9936
9937 BIND(L_aligned);
9938 movl(tmp, len); // save
9939 shrl(len, 4);
9940 jcc(Assembler::zero, L_tail_restore);
9941
9942 // Fold total 512 bits of polynomial on each iteration
9943 if (VM_Version::supports_vpclmulqdq()) {
9944 Label Parallel_loop, L_No_Parallel;
9945
9946 cmpl(len, 8);
9947 jccb(Assembler::less, L_No_Parallel);
9948
9949 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 32));
9950 evmovdquq(xmm1, Address(buf, 0), Assembler::AVX_512bit);
9951 movdl(xmm5, crc);
9952 evpxorq(xmm1, xmm1, xmm5, Assembler::AVX_512bit);
9953 addptr(buf, 64);
9954 subl(len, 7);
9955 evshufi64x2(xmm0, xmm0, xmm0, 0x00, Assembler::AVX_512bit); //propagate the mask from 128 bits to 512 bits
9956
9957 BIND(Parallel_loop);
9958 fold_128bit_crc32_avx512(xmm1, xmm0, xmm5, buf, 0);
9959 addptr(buf, 64);
9960 subl(len, 4);
9961 jcc(Assembler::greater, Parallel_loop);
9962
9963 vextracti64x2(xmm2, xmm1, 0x01);
9964 vextracti64x2(xmm3, xmm1, 0x02);
9965 vextracti64x2(xmm4, xmm1, 0x03);
9966 jmp(L_fold_512b);
9967
9968 BIND(L_No_Parallel);
9969 }
9970 // Fold crc into first bytes of vector
9971 movdqa(xmm1, Address(buf, 0));
9972 movdl(rax, xmm1);
9973 xorl(crc, rax);
9974 if (VM_Version::supports_sse4_1()) {
9975 pinsrd(xmm1, crc, 0);
9976 } else {
9977 pinsrw(xmm1, crc, 0);
9978 shrl(crc, 16);
9979 pinsrw(xmm1, crc, 1);
9980 }
9981 addptr(buf, 16);
9982 subl(len, 4); // len > 0
9983 jcc(Assembler::less, L_fold_tail);
9984
9985 movdqa(xmm2, Address(buf, 0));
9986 movdqa(xmm3, Address(buf, 16));
9987 movdqa(xmm4, Address(buf, 32));
9988 addptr(buf, 48);
9989 subl(len, 3);
9990 jcc(Assembler::lessEqual, L_fold_512b);
9991
9992 // Fold total 512 bits of polynomial on each iteration,
9993 // 128 bits per each of 4 parallel streams.
9994 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 32));
9995
9996 align(32);
9997 BIND(L_fold_512b_loop);
9998 fold_128bit_crc32(xmm1, xmm0, xmm5, buf, 0);
9999 fold_128bit_crc32(xmm2, xmm0, xmm5, buf, 16);
10000 fold_128bit_crc32(xmm3, xmm0, xmm5, buf, 32);
10001 fold_128bit_crc32(xmm4, xmm0, xmm5, buf, 48);
10002 addptr(buf, 64);
10003 subl(len, 4);
10004 jcc(Assembler::greater, L_fold_512b_loop);
10005
10006 // Fold 512 bits to 128 bits.
10007 BIND(L_fold_512b);
10008 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 16));
10009 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm2);
10010 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm3);
10011 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm4);
10012
10013 // Fold the rest of 128 bits data chunks
10014 BIND(L_fold_tail);
10015 addl(len, 3);
10016 jccb(Assembler::lessEqual, L_fold_128b);
10017 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 16));
10018
10019 BIND(L_fold_tail_loop);
10020 fold_128bit_crc32(xmm1, xmm0, xmm5, buf, 0);
10021 addptr(buf, 16);
10022 decrementl(len);
10023 jccb(Assembler::greater, L_fold_tail_loop);
10024
10025 // Fold 128 bits in xmm1 down into 32 bits in crc register.
10026 BIND(L_fold_128b);
10027 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr()));
10028 if (UseAVX > 0) {
10029 vpclmulqdq(xmm2, xmm0, xmm1, 0x1);
10030 vpand(xmm3, xmm0, xmm2, 0 /* vector_len */);
10031 vpclmulqdq(xmm0, xmm0, xmm3, 0x1);
10032 } else {
10033 movdqa(xmm2, xmm0);
10034 pclmulqdq(xmm2, xmm1, 0x1);
10035 movdqa(xmm3, xmm0);
10036 pand(xmm3, xmm2);
10037 pclmulqdq(xmm0, xmm3, 0x1);
10038 }
10039 psrldq(xmm1, 8);
10040 psrldq(xmm2, 4);
10041 pxor(xmm0, xmm1);
10042 pxor(xmm0, xmm2);
10043
10044 // 8 8-bit folds to compute 32-bit CRC.
10045 for (int j = 0; j < 4; j++) {
10046 fold_8bit_crc32(xmm0, table, xmm1, rax);
10047 }
10048 movdl(crc, xmm0); // mov 32 bits to general register
10049 for (int j = 0; j < 4; j++) {
10050 fold_8bit_crc32(crc, table, rax);
10051 }
10052
10053 BIND(L_tail_restore);
10054 movl(len, tmp); // restore
10055 BIND(L_tail);
10056 andl(len, 0xf);
10057 jccb(Assembler::zero, L_exit);
10058
10059 // Fold the rest of bytes
10060 align(4);
10061 BIND(L_tail_loop);
10062 movsbl(rax, Address(buf, 0)); // load byte with sign extension
10063 update_byte_crc32(crc, rax, table);
10064 increment(buf);
10065 decrementl(len);
10066 jccb(Assembler::greater, L_tail_loop);
10067
10068 BIND(L_exit);
10069 notl(crc); // ~c
10070 }
10071
10072 #ifdef _LP64
10073 // S. Gueron / Information Processing Letters 112 (2012) 184
10074 // Algorithm 4: Computing carry-less multiplication using a precomputed lookup table.
10075 // Input: A 32 bit value B = [byte3, byte2, byte1, byte0].
10076 // Output: the 64-bit carry-less product of B * CONST
10077 void MacroAssembler::crc32c_ipl_alg4(Register in, uint32_t n,
10078 Register tmp1, Register tmp2, Register tmp3) {
10079 lea(tmp3, ExternalAddress(StubRoutines::crc32c_table_addr()));
10080 if (n > 0) {
10081 addq(tmp3, n * 256 * 8);
10082 }
10083 // Q1 = TABLEExt[n][B & 0xFF];
10084 movl(tmp1, in);
10085 andl(tmp1, 0x000000FF);
10086 shll(tmp1, 3);
10087 addq(tmp1, tmp3);
10088 movq(tmp1, Address(tmp1, 0));
10089
10090 // Q2 = TABLEExt[n][B >> 8 & 0xFF];
10091 movl(tmp2, in);
10092 shrl(tmp2, 8);
10093 andl(tmp2, 0x000000FF);
10094 shll(tmp2, 3);
10095 addq(tmp2, tmp3);
10096 movq(tmp2, Address(tmp2, 0));
10097
10098 shlq(tmp2, 8);
10099 xorq(tmp1, tmp2);
10100
10101 // Q3 = TABLEExt[n][B >> 16 & 0xFF];
10102 movl(tmp2, in);
10103 shrl(tmp2, 16);
10104 andl(tmp2, 0x000000FF);
10105 shll(tmp2, 3);
10106 addq(tmp2, tmp3);
10107 movq(tmp2, Address(tmp2, 0));
10108
10109 shlq(tmp2, 16);
10110 xorq(tmp1, tmp2);
10111
10112 // Q4 = TABLEExt[n][B >> 24 & 0xFF];
10113 shrl(in, 24);
10114 andl(in, 0x000000FF);
10115 shll(in, 3);
10116 addq(in, tmp3);
10117 movq(in, Address(in, 0));
10118
10119 shlq(in, 24);
10120 xorq(in, tmp1);
10121 // return Q1 ^ Q2 << 8 ^ Q3 << 16 ^ Q4 << 24;
10122 }
10123
10124 void MacroAssembler::crc32c_pclmulqdq(XMMRegister w_xtmp1,
10125 Register in_out,
10126 uint32_t const_or_pre_comp_const_index, bool is_pclmulqdq_supported,
10127 XMMRegister w_xtmp2,
10128 Register tmp1,
10129 Register n_tmp2, Register n_tmp3) {
10130 if (is_pclmulqdq_supported) {
10131 movdl(w_xtmp1, in_out); // modified blindly
10132
10133 movl(tmp1, const_or_pre_comp_const_index);
10134 movdl(w_xtmp2, tmp1);
10135 pclmulqdq(w_xtmp1, w_xtmp2, 0);
10136
10137 movdq(in_out, w_xtmp1);
10138 } else {
10139 crc32c_ipl_alg4(in_out, const_or_pre_comp_const_index, tmp1, n_tmp2, n_tmp3);
10140 }
10141 }
10142
10143 // Recombination Alternative 2: No bit-reflections
10144 // T1 = (CRC_A * U1) << 1
10145 // T2 = (CRC_B * U2) << 1
10146 // C1 = T1 >> 32
10147 // C2 = T2 >> 32
10148 // T1 = T1 & 0xFFFFFFFF
10149 // T2 = T2 & 0xFFFFFFFF
10150 // T1 = CRC32(0, T1)
10151 // T2 = CRC32(0, T2)
10152 // C1 = C1 ^ T1
10153 // C2 = C2 ^ T2
10154 // CRC = C1 ^ C2 ^ CRC_C
10155 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,
10156 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3,
10157 Register tmp1, Register tmp2,
10158 Register n_tmp3) {
10159 crc32c_pclmulqdq(w_xtmp1, in_out, const_or_pre_comp_const_index_u1, is_pclmulqdq_supported, w_xtmp3, tmp1, tmp2, n_tmp3);
10160 crc32c_pclmulqdq(w_xtmp2, in1, const_or_pre_comp_const_index_u2, is_pclmulqdq_supported, w_xtmp3, tmp1, tmp2, n_tmp3);
10161 shlq(in_out, 1);
10162 movl(tmp1, in_out);
10163 shrq(in_out, 32);
10164 xorl(tmp2, tmp2);
10165 crc32(tmp2, tmp1, 4);
10166 xorl(in_out, tmp2); // we don't care about upper 32 bit contents here
10167 shlq(in1, 1);
10168 movl(tmp1, in1);
10169 shrq(in1, 32);
10170 xorl(tmp2, tmp2);
10171 crc32(tmp2, tmp1, 4);
10172 xorl(in1, tmp2);
10173 xorl(in_out, in1);
10174 xorl(in_out, in2);
10175 }
10176
10177 // Set N to predefined value
10178 // Subtract from a lenght of a buffer
10179 // execute in a loop:
10180 // CRC_A = 0xFFFFFFFF, CRC_B = 0, CRC_C = 0
10181 // for i = 1 to N do
10182 // CRC_A = CRC32(CRC_A, A[i])
10183 // CRC_B = CRC32(CRC_B, B[i])
10184 // CRC_C = CRC32(CRC_C, C[i])
10185 // end for
10186 // Recombine
10187 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,
10188 Register in_out1, Register in_out2, Register in_out3,
10189 Register tmp1, Register tmp2, Register tmp3,
10190 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3,
10191 Register tmp4, Register tmp5,
10192 Register n_tmp6) {
10193 Label L_processPartitions;
10194 Label L_processPartition;
10195 Label L_exit;
10196
10197 bind(L_processPartitions);
10198 cmpl(in_out1, 3 * size);
10199 jcc(Assembler::less, L_exit);
10200 xorl(tmp1, tmp1);
10201 xorl(tmp2, tmp2);
10202 movq(tmp3, in_out2);
10203 addq(tmp3, size);
10204
10205 bind(L_processPartition);
10206 crc32(in_out3, Address(in_out2, 0), 8);
10207 crc32(tmp1, Address(in_out2, size), 8);
10208 crc32(tmp2, Address(in_out2, size * 2), 8);
10209 addq(in_out2, 8);
10210 cmpq(in_out2, tmp3);
10211 jcc(Assembler::less, L_processPartition);
10212 crc32c_rec_alt2(const_or_pre_comp_const_index_u1, const_or_pre_comp_const_index_u2, is_pclmulqdq_supported, in_out3, tmp1, tmp2,
10213 w_xtmp1, w_xtmp2, w_xtmp3,
10214 tmp4, tmp5,
10215 n_tmp6);
10216 addq(in_out2, 2 * size);
10217 subl(in_out1, 3 * size);
10218 jmp(L_processPartitions);
10219
10220 bind(L_exit);
10221 }
10222 #else
10223 void MacroAssembler::crc32c_ipl_alg4(Register in_out, uint32_t n,
10224 Register tmp1, Register tmp2, Register tmp3,
10225 XMMRegister xtmp1, XMMRegister xtmp2) {
10226 lea(tmp3, ExternalAddress(StubRoutines::crc32c_table_addr()));
10227 if (n > 0) {
10228 addl(tmp3, n * 256 * 8);
10229 }
10230 // Q1 = TABLEExt[n][B & 0xFF];
10231 movl(tmp1, in_out);
10232 andl(tmp1, 0x000000FF);
10233 shll(tmp1, 3);
10234 addl(tmp1, tmp3);
10235 movq(xtmp1, Address(tmp1, 0));
10236
10237 // Q2 = TABLEExt[n][B >> 8 & 0xFF];
10238 movl(tmp2, in_out);
10239 shrl(tmp2, 8);
10240 andl(tmp2, 0x000000FF);
10241 shll(tmp2, 3);
10242 addl(tmp2, tmp3);
10243 movq(xtmp2, Address(tmp2, 0));
10244
10245 psllq(xtmp2, 8);
10246 pxor(xtmp1, xtmp2);
10247
10248 // Q3 = TABLEExt[n][B >> 16 & 0xFF];
10249 movl(tmp2, in_out);
10250 shrl(tmp2, 16);
10251 andl(tmp2, 0x000000FF);
10252 shll(tmp2, 3);
10253 addl(tmp2, tmp3);
10254 movq(xtmp2, Address(tmp2, 0));
10255
10256 psllq(xtmp2, 16);
10257 pxor(xtmp1, xtmp2);
10258
10259 // Q4 = TABLEExt[n][B >> 24 & 0xFF];
10260 shrl(in_out, 24);
10261 andl(in_out, 0x000000FF);
10262 shll(in_out, 3);
10263 addl(in_out, tmp3);
10264 movq(xtmp2, Address(in_out, 0));
10265
10266 psllq(xtmp2, 24);
10267 pxor(xtmp1, xtmp2); // Result in CXMM
10268 // return Q1 ^ Q2 << 8 ^ Q3 << 16 ^ Q4 << 24;
10269 }
10270
10271 void MacroAssembler::crc32c_pclmulqdq(XMMRegister w_xtmp1,
10272 Register in_out,
10273 uint32_t const_or_pre_comp_const_index, bool is_pclmulqdq_supported,
10274 XMMRegister w_xtmp2,
10275 Register tmp1,
10276 Register n_tmp2, Register n_tmp3) {
10277 if (is_pclmulqdq_supported) {
10278 movdl(w_xtmp1, in_out);
10279
10280 movl(tmp1, const_or_pre_comp_const_index);
10281 movdl(w_xtmp2, tmp1);
10282 pclmulqdq(w_xtmp1, w_xtmp2, 0);
10283 // Keep result in XMM since GPR is 32 bit in length
10284 } else {
10285 crc32c_ipl_alg4(in_out, const_or_pre_comp_const_index, tmp1, n_tmp2, n_tmp3, w_xtmp1, w_xtmp2);
10286 }
10287 }
10288
10289 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,
10290 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3,
10291 Register tmp1, Register tmp2,
10292 Register n_tmp3) {
10293 crc32c_pclmulqdq(w_xtmp1, in_out, const_or_pre_comp_const_index_u1, is_pclmulqdq_supported, w_xtmp3, tmp1, tmp2, n_tmp3);
10294 crc32c_pclmulqdq(w_xtmp2, in1, const_or_pre_comp_const_index_u2, is_pclmulqdq_supported, w_xtmp3, tmp1, tmp2, n_tmp3);
10295
10296 psllq(w_xtmp1, 1);
10297 movdl(tmp1, w_xtmp1);
10298 psrlq(w_xtmp1, 32);
10299 movdl(in_out, w_xtmp1);
10300
10301 xorl(tmp2, tmp2);
10302 crc32(tmp2, tmp1, 4);
10303 xorl(in_out, tmp2);
10304
10305 psllq(w_xtmp2, 1);
10306 movdl(tmp1, w_xtmp2);
10307 psrlq(w_xtmp2, 32);
10308 movdl(in1, w_xtmp2);
10309
10310 xorl(tmp2, tmp2);
10311 crc32(tmp2, tmp1, 4);
10312 xorl(in1, tmp2);
10313 xorl(in_out, in1);
10314 xorl(in_out, in2);
10315 }
10316
10317 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,
10318 Register in_out1, Register in_out2, Register in_out3,
10319 Register tmp1, Register tmp2, Register tmp3,
10320 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3,
10321 Register tmp4, Register tmp5,
10322 Register n_tmp6) {
10323 Label L_processPartitions;
10324 Label L_processPartition;
10325 Label L_exit;
10326
10327 bind(L_processPartitions);
10328 cmpl(in_out1, 3 * size);
10329 jcc(Assembler::less, L_exit);
10330 xorl(tmp1, tmp1);
10331 xorl(tmp2, tmp2);
10332 movl(tmp3, in_out2);
10333 addl(tmp3, size);
10334
10335 bind(L_processPartition);
10336 crc32(in_out3, Address(in_out2, 0), 4);
10337 crc32(tmp1, Address(in_out2, size), 4);
10338 crc32(tmp2, Address(in_out2, size*2), 4);
10339 crc32(in_out3, Address(in_out2, 0+4), 4);
10340 crc32(tmp1, Address(in_out2, size+4), 4);
10341 crc32(tmp2, Address(in_out2, size*2+4), 4);
10342 addl(in_out2, 8);
10343 cmpl(in_out2, tmp3);
10344 jcc(Assembler::less, L_processPartition);
10345
10346 push(tmp3);
10347 push(in_out1);
10348 push(in_out2);
10349 tmp4 = tmp3;
10350 tmp5 = in_out1;
10351 n_tmp6 = in_out2;
10352
10353 crc32c_rec_alt2(const_or_pre_comp_const_index_u1, const_or_pre_comp_const_index_u2, is_pclmulqdq_supported, in_out3, tmp1, tmp2,
10354 w_xtmp1, w_xtmp2, w_xtmp3,
10355 tmp4, tmp5,
10356 n_tmp6);
10357
10358 pop(in_out2);
10359 pop(in_out1);
10360 pop(tmp3);
10361
10362 addl(in_out2, 2 * size);
10363 subl(in_out1, 3 * size);
10364 jmp(L_processPartitions);
10365
10366 bind(L_exit);
10367 }
10368 #endif //LP64
10369
10370 #ifdef _LP64
10371 // Algorithm 2: Pipelined usage of the CRC32 instruction.
10372 // Input: A buffer I of L bytes.
10373 // Output: the CRC32C value of the buffer.
10374 // Notations:
10375 // Write L = 24N + r, with N = floor (L/24).
10376 // r = L mod 24 (0 <= r < 24).
10377 // Consider I as the concatenation of A|B|C|R, where A, B, C, each,
10378 // N quadwords, and R consists of r bytes.
10379 // A[j] = I [8j+7:8j], j= 0, 1, ..., N-1
10380 // B[j] = I [N + 8j+7:N + 8j], j= 0, 1, ..., N-1
10381 // C[j] = I [2N + 8j+7:2N + 8j], j= 0, 1, ..., N-1
10382 // if r > 0 R[j] = I [3N +j], j= 0, 1, ...,r-1
10383 void MacroAssembler::crc32c_ipl_alg2_alt2(Register in_out, Register in1, Register in2,
10384 Register tmp1, Register tmp2, Register tmp3,
10385 Register tmp4, Register tmp5, Register tmp6,
10386 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3,
10387 bool is_pclmulqdq_supported) {
10388 uint32_t const_or_pre_comp_const_index[CRC32C_NUM_PRECOMPUTED_CONSTANTS];
10389 Label L_wordByWord;
10390 Label L_byteByByteProlog;
10391 Label L_byteByByte;
10392 Label L_exit;
10393
10394 if (is_pclmulqdq_supported ) {
10395 const_or_pre_comp_const_index[1] = *(uint32_t *)StubRoutines::_crc32c_table_addr;
10396 const_or_pre_comp_const_index[0] = *((uint32_t *)StubRoutines::_crc32c_table_addr+1);
10397
10398 const_or_pre_comp_const_index[3] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 2);
10399 const_or_pre_comp_const_index[2] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 3);
10400
10401 const_or_pre_comp_const_index[5] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 4);
10402 const_or_pre_comp_const_index[4] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 5);
10403 assert((CRC32C_NUM_PRECOMPUTED_CONSTANTS - 1 ) == 5, "Checking whether you declared all of the constants based on the number of \"chunks\"");
10404 } else {
10405 const_or_pre_comp_const_index[0] = 1;
10406 const_or_pre_comp_const_index[1] = 0;
10407
10408 const_or_pre_comp_const_index[2] = 3;
10409 const_or_pre_comp_const_index[3] = 2;
10410
10411 const_or_pre_comp_const_index[4] = 5;
10412 const_or_pre_comp_const_index[5] = 4;
10413 }
10414 crc32c_proc_chunk(CRC32C_HIGH, const_or_pre_comp_const_index[0], const_or_pre_comp_const_index[1], is_pclmulqdq_supported,
10415 in2, in1, in_out,
10416 tmp1, tmp2, tmp3,
10417 w_xtmp1, w_xtmp2, w_xtmp3,
10418 tmp4, tmp5,
10419 tmp6);
10420 crc32c_proc_chunk(CRC32C_MIDDLE, const_or_pre_comp_const_index[2], const_or_pre_comp_const_index[3], is_pclmulqdq_supported,
10421 in2, in1, in_out,
10422 tmp1, tmp2, tmp3,
10423 w_xtmp1, w_xtmp2, w_xtmp3,
10424 tmp4, tmp5,
10425 tmp6);
10426 crc32c_proc_chunk(CRC32C_LOW, const_or_pre_comp_const_index[4], const_or_pre_comp_const_index[5], is_pclmulqdq_supported,
10427 in2, in1, in_out,
10428 tmp1, tmp2, tmp3,
10429 w_xtmp1, w_xtmp2, w_xtmp3,
10430 tmp4, tmp5,
10431 tmp6);
10432 movl(tmp1, in2);
10433 andl(tmp1, 0x00000007);
10434 negl(tmp1);
10435 addl(tmp1, in2);
10436 addq(tmp1, in1);
10437
10438 BIND(L_wordByWord);
10439 cmpq(in1, tmp1);
10440 jcc(Assembler::greaterEqual, L_byteByByteProlog);
10441 crc32(in_out, Address(in1, 0), 4);
10442 addq(in1, 4);
10443 jmp(L_wordByWord);
10444
10445 BIND(L_byteByByteProlog);
10446 andl(in2, 0x00000007);
10447 movl(tmp2, 1);
10448
10449 BIND(L_byteByByte);
10450 cmpl(tmp2, in2);
10451 jccb(Assembler::greater, L_exit);
10452 crc32(in_out, Address(in1, 0), 1);
10453 incq(in1);
10454 incl(tmp2);
10455 jmp(L_byteByByte);
10456
10457 BIND(L_exit);
10458 }
10459 #else
10460 void MacroAssembler::crc32c_ipl_alg2_alt2(Register in_out, Register in1, Register in2,
10461 Register tmp1, Register tmp2, Register tmp3,
10462 Register tmp4, Register tmp5, Register tmp6,
10463 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3,
10464 bool is_pclmulqdq_supported) {
10465 uint32_t const_or_pre_comp_const_index[CRC32C_NUM_PRECOMPUTED_CONSTANTS];
10466 Label L_wordByWord;
10467 Label L_byteByByteProlog;
10468 Label L_byteByByte;
10469 Label L_exit;
10470
10471 if (is_pclmulqdq_supported) {
10472 const_or_pre_comp_const_index[1] = *(uint32_t *)StubRoutines::_crc32c_table_addr;
10473 const_or_pre_comp_const_index[0] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 1);
10474
10475 const_or_pre_comp_const_index[3] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 2);
10476 const_or_pre_comp_const_index[2] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 3);
10477
10478 const_or_pre_comp_const_index[5] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 4);
10479 const_or_pre_comp_const_index[4] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 5);
10480 } else {
10481 const_or_pre_comp_const_index[0] = 1;
10482 const_or_pre_comp_const_index[1] = 0;
10483
10484 const_or_pre_comp_const_index[2] = 3;
10485 const_or_pre_comp_const_index[3] = 2;
10486
10487 const_or_pre_comp_const_index[4] = 5;
10488 const_or_pre_comp_const_index[5] = 4;
10489 }
10490 crc32c_proc_chunk(CRC32C_HIGH, const_or_pre_comp_const_index[0], const_or_pre_comp_const_index[1], is_pclmulqdq_supported,
10491 in2, in1, in_out,
10492 tmp1, tmp2, tmp3,
10493 w_xtmp1, w_xtmp2, w_xtmp3,
10494 tmp4, tmp5,
10495 tmp6);
10496 crc32c_proc_chunk(CRC32C_MIDDLE, const_or_pre_comp_const_index[2], const_or_pre_comp_const_index[3], is_pclmulqdq_supported,
10497 in2, in1, in_out,
10498 tmp1, tmp2, tmp3,
10499 w_xtmp1, w_xtmp2, w_xtmp3,
10500 tmp4, tmp5,
10501 tmp6);
10502 crc32c_proc_chunk(CRC32C_LOW, const_or_pre_comp_const_index[4], const_or_pre_comp_const_index[5], is_pclmulqdq_supported,
10503 in2, in1, in_out,
10504 tmp1, tmp2, tmp3,
10505 w_xtmp1, w_xtmp2, w_xtmp3,
10506 tmp4, tmp5,
10507 tmp6);
10508 movl(tmp1, in2);
10509 andl(tmp1, 0x00000007);
10510 negl(tmp1);
10511 addl(tmp1, in2);
10512 addl(tmp1, in1);
10513
10514 BIND(L_wordByWord);
10515 cmpl(in1, tmp1);
10516 jcc(Assembler::greaterEqual, L_byteByByteProlog);
10517 crc32(in_out, Address(in1,0), 4);
10518 addl(in1, 4);
10519 jmp(L_wordByWord);
10520
10521 BIND(L_byteByByteProlog);
10522 andl(in2, 0x00000007);
10523 movl(tmp2, 1);
10524
10525 BIND(L_byteByByte);
10526 cmpl(tmp2, in2);
10527 jccb(Assembler::greater, L_exit);
10528 movb(tmp1, Address(in1, 0));
10529 crc32(in_out, tmp1, 1);
10530 incl(in1);
10531 incl(tmp2);
10532 jmp(L_byteByByte);
10533
10534 BIND(L_exit);
10535 }
10536 #endif // LP64
10537 #undef BIND
10538 #undef BLOCK_COMMENT
10539
10540 // Compress char[] array to byte[].
10541 // ..\jdk\src\java.base\share\classes\java\lang\StringUTF16.java
10542 // @HotSpotIntrinsicCandidate
10543 // private static int compress(char[] src, int srcOff, byte[] dst, int dstOff, int len) {
10544 // for (int i = 0; i < len; i++) {
10545 // int c = src[srcOff++];
10546 // if (c >>> 8 != 0) {
10547 // return 0;
10548 // }
10549 // dst[dstOff++] = (byte)c;
10550 // }
10551 // return len;
10552 // }
10553 void MacroAssembler::char_array_compress(Register src, Register dst, Register len,
10554 XMMRegister tmp1Reg, XMMRegister tmp2Reg,
10555 XMMRegister tmp3Reg, XMMRegister tmp4Reg,
10556 Register tmp5, Register result) {
10557 Label copy_chars_loop, return_length, return_zero, done, below_threshold;
10558
10559 // rsi: src
10560 // rdi: dst
10561 // rdx: len
10562 // rcx: tmp5
10563 // rax: result
10564
10565 // rsi holds start addr of source char[] to be compressed
10566 // rdi holds start addr of destination byte[]
10567 // rdx holds length
10568
10569 assert(len != result, "");
10570
10571 // save length for return
10572 push(len);
10573
10574 if ((UseAVX > 2) && // AVX512
10575 VM_Version::supports_avx512vlbw() &&
10576 VM_Version::supports_bmi2()) {
10577
10578 set_vector_masking(); // opening of the stub context for programming mask registers
10579
10580 Label copy_32_loop, copy_loop_tail, restore_k1_return_zero;
10581
10582 // alignement
10583 Label post_alignement;
10584
10585 // if length of the string is less than 16, handle it in an old fashioned
10586 // way
10587 testl(len, -32);
10588 jcc(Assembler::zero, below_threshold);
10589
10590 // First check whether a character is compressable ( <= 0xFF).
10591 // Create mask to test for Unicode chars inside zmm vector
10592 movl(result, 0x00FF);
10593 evpbroadcastw(tmp2Reg, result, Assembler::AVX_512bit);
10594
10595 // Save k1
10596 kmovql(k3, k1);
10597
10598 testl(len, -64);
10599 jcc(Assembler::zero, post_alignement);
10600
10601 movl(tmp5, dst);
10602 andl(tmp5, (32 - 1));
10603 negl(tmp5);
10604 andl(tmp5, (32 - 1));
10605
10606 // bail out when there is nothing to be done
10607 testl(tmp5, 0xFFFFFFFF);
10608 jcc(Assembler::zero, post_alignement);
10609
10610 // ~(~0 << len), where len is the # of remaining elements to process
10611 movl(result, 0xFFFFFFFF);
10612 shlxl(result, result, tmp5);
10613 notl(result);
10614 kmovdl(k1, result);
10615
10616 evmovdquw(tmp1Reg, k1, Address(src, 0), Assembler::AVX_512bit);
10617 evpcmpuw(k2, k1, tmp1Reg, tmp2Reg, Assembler::le, Assembler::AVX_512bit);
10618 ktestd(k2, k1);
10619 jcc(Assembler::carryClear, restore_k1_return_zero);
10620
10621 evpmovwb(Address(dst, 0), k1, tmp1Reg, Assembler::AVX_512bit);
10622
10623 addptr(src, tmp5);
10624 addptr(src, tmp5);
10625 addptr(dst, tmp5);
10626 subl(len, tmp5);
10627
10628 bind(post_alignement);
10629 // end of alignement
10630
10631 movl(tmp5, len);
10632 andl(tmp5, (32 - 1)); // tail count (in chars)
10633 andl(len, ~(32 - 1)); // vector count (in chars)
10634 jcc(Assembler::zero, copy_loop_tail);
10635
10636 lea(src, Address(src, len, Address::times_2));
10637 lea(dst, Address(dst, len, Address::times_1));
10638 negptr(len);
10639
10640 bind(copy_32_loop);
10641 evmovdquw(tmp1Reg, Address(src, len, Address::times_2), Assembler::AVX_512bit);
10642 evpcmpuw(k2, tmp1Reg, tmp2Reg, Assembler::le, Assembler::AVX_512bit);
10643 kortestdl(k2, k2);
10644 jcc(Assembler::carryClear, restore_k1_return_zero);
10645
10646 // All elements in current processed chunk are valid candidates for
10647 // compression. Write a truncated byte elements to the memory.
10648 evpmovwb(Address(dst, len, Address::times_1), tmp1Reg, Assembler::AVX_512bit);
10649 addptr(len, 32);
10650 jcc(Assembler::notZero, copy_32_loop);
10651
10652 bind(copy_loop_tail);
10653 // bail out when there is nothing to be done
10654 testl(tmp5, 0xFFFFFFFF);
10655 // Restore k1
10656 kmovql(k1, k3);
10657 jcc(Assembler::zero, return_length);
10658
10659 movl(len, tmp5);
10660
10661 // ~(~0 << len), where len is the # of remaining elements to process
10662 movl(result, 0xFFFFFFFF);
10663 shlxl(result, result, len);
10664 notl(result);
10665
10666 kmovdl(k1, result);
10667
10668 evmovdquw(tmp1Reg, k1, Address(src, 0), Assembler::AVX_512bit);
10669 evpcmpuw(k2, k1, tmp1Reg, tmp2Reg, Assembler::le, Assembler::AVX_512bit);
10670 ktestd(k2, k1);
10671 jcc(Assembler::carryClear, restore_k1_return_zero);
10672
10673 evpmovwb(Address(dst, 0), k1, tmp1Reg, Assembler::AVX_512bit);
10674 // Restore k1
10675 kmovql(k1, k3);
10676 jmp(return_length);
10677
10678 bind(restore_k1_return_zero);
10679 // Restore k1
10680 kmovql(k1, k3);
10681 jmp(return_zero);
10682
10683 clear_vector_masking(); // closing of the stub context for programming mask registers
10684 }
10685 if (UseSSE42Intrinsics) {
10686 Label copy_32_loop, copy_16, copy_tail;
10687
10688 bind(below_threshold);
10689
10690 movl(result, len);
10691
10692 movl(tmp5, 0xff00ff00); // create mask to test for Unicode chars in vectors
10693
10694 // vectored compression
10695 andl(len, 0xfffffff0); // vector count (in chars)
10696 andl(result, 0x0000000f); // tail count (in chars)
10697 testl(len, len);
10698 jccb(Assembler::zero, copy_16);
10699
10700 // compress 16 chars per iter
10701 movdl(tmp1Reg, tmp5);
10702 pshufd(tmp1Reg, tmp1Reg, 0); // store Unicode mask in tmp1Reg
10703 pxor(tmp4Reg, tmp4Reg);
10704
10705 lea(src, Address(src, len, Address::times_2));
10706 lea(dst, Address(dst, len, Address::times_1));
10707 negptr(len);
10708
10709 bind(copy_32_loop);
10710 movdqu(tmp2Reg, Address(src, len, Address::times_2)); // load 1st 8 characters
10711 por(tmp4Reg, tmp2Reg);
10712 movdqu(tmp3Reg, Address(src, len, Address::times_2, 16)); // load next 8 characters
10713 por(tmp4Reg, tmp3Reg);
10714 ptest(tmp4Reg, tmp1Reg); // check for Unicode chars in next vector
10715 jcc(Assembler::notZero, return_zero);
10716 packuswb(tmp2Reg, tmp3Reg); // only ASCII chars; compress each to 1 byte
10717 movdqu(Address(dst, len, Address::times_1), tmp2Reg);
10718 addptr(len, 16);
10719 jcc(Assembler::notZero, copy_32_loop);
10720
10721 // compress next vector of 8 chars (if any)
10722 bind(copy_16);
10723 movl(len, result);
10724 andl(len, 0xfffffff8); // vector count (in chars)
10725 andl(result, 0x00000007); // tail count (in chars)
10726 testl(len, len);
10727 jccb(Assembler::zero, copy_tail);
10728
10729 movdl(tmp1Reg, tmp5);
10730 pshufd(tmp1Reg, tmp1Reg, 0); // store Unicode mask in tmp1Reg
10731 pxor(tmp3Reg, tmp3Reg);
10732
10733 movdqu(tmp2Reg, Address(src, 0));
10734 ptest(tmp2Reg, tmp1Reg); // check for Unicode chars in vector
10735 jccb(Assembler::notZero, return_zero);
10736 packuswb(tmp2Reg, tmp3Reg); // only LATIN1 chars; compress each to 1 byte
10737 movq(Address(dst, 0), tmp2Reg);
10738 addptr(src, 16);
10739 addptr(dst, 8);
10740
10741 bind(copy_tail);
10742 movl(len, result);
10743 }
10744 // compress 1 char per iter
10745 testl(len, len);
10746 jccb(Assembler::zero, return_length);
10747 lea(src, Address(src, len, Address::times_2));
10748 lea(dst, Address(dst, len, Address::times_1));
10749 negptr(len);
10750
10751 bind(copy_chars_loop);
10752 load_unsigned_short(result, Address(src, len, Address::times_2));
10753 testl(result, 0xff00); // check if Unicode char
10754 jccb(Assembler::notZero, return_zero);
10755 movb(Address(dst, len, Address::times_1), result); // ASCII char; compress to 1 byte
10756 increment(len);
10757 jcc(Assembler::notZero, copy_chars_loop);
10758
10759 // if compression succeeded, return length
10760 bind(return_length);
10761 pop(result);
10762 jmpb(done);
10763
10764 // if compression failed, return 0
10765 bind(return_zero);
10766 xorl(result, result);
10767 addptr(rsp, wordSize);
10768
10769 bind(done);
10770 }
10771
10772 // Inflate byte[] array to char[].
10773 // ..\jdk\src\java.base\share\classes\java\lang\StringLatin1.java
10774 // @HotSpotIntrinsicCandidate
10775 // private static void inflate(byte[] src, int srcOff, char[] dst, int dstOff, int len) {
10776 // for (int i = 0; i < len; i++) {
10777 // dst[dstOff++] = (char)(src[srcOff++] & 0xff);
10778 // }
10779 // }
10780 void MacroAssembler::byte_array_inflate(Register src, Register dst, Register len,
10781 XMMRegister tmp1, Register tmp2) {
10782 Label copy_chars_loop, done, below_threshold;
10783 // rsi: src
10784 // rdi: dst
10785 // rdx: len
10786 // rcx: tmp2
10787
10788 // rsi holds start addr of source byte[] to be inflated
10789 // rdi holds start addr of destination char[]
10790 // rdx holds length
10791 assert_different_registers(src, dst, len, tmp2);
10792
10793 if ((UseAVX > 2) && // AVX512
10794 VM_Version::supports_avx512vlbw() &&
10795 VM_Version::supports_bmi2()) {
10796
10797 set_vector_masking(); // opening of the stub context for programming mask registers
10798
10799 Label copy_32_loop, copy_tail;
10800 Register tmp3_aliased = len;
10801
10802 // if length of the string is less than 16, handle it in an old fashioned
10803 // way
10804 testl(len, -16);
10805 jcc(Assembler::zero, below_threshold);
10806
10807 // In order to use only one arithmetic operation for the main loop we use
10808 // this pre-calculation
10809 movl(tmp2, len);
10810 andl(tmp2, (32 - 1)); // tail count (in chars), 32 element wide loop
10811 andl(len, -32); // vector count
10812 jccb(Assembler::zero, copy_tail);
10813
10814 lea(src, Address(src, len, Address::times_1));
10815 lea(dst, Address(dst, len, Address::times_2));
10816 negptr(len);
10817
10818
10819 // inflate 32 chars per iter
10820 bind(copy_32_loop);
10821 vpmovzxbw(tmp1, Address(src, len, Address::times_1), Assembler::AVX_512bit);
10822 evmovdquw(Address(dst, len, Address::times_2), tmp1, Assembler::AVX_512bit);
10823 addptr(len, 32);
10824 jcc(Assembler::notZero, copy_32_loop);
10825
10826 bind(copy_tail);
10827 // bail out when there is nothing to be done
10828 testl(tmp2, -1); // we don't destroy the contents of tmp2 here
10829 jcc(Assembler::zero, done);
10830
10831 // Save k1
10832 kmovql(k2, k1);
10833
10834 // ~(~0 << length), where length is the # of remaining elements to process
10835 movl(tmp3_aliased, -1);
10836 shlxl(tmp3_aliased, tmp3_aliased, tmp2);
10837 notl(tmp3_aliased);
10838 kmovdl(k1, tmp3_aliased);
10839 evpmovzxbw(tmp1, k1, Address(src, 0), Assembler::AVX_512bit);
10840 evmovdquw(Address(dst, 0), k1, tmp1, Assembler::AVX_512bit);
10841
10842 // Restore k1
10843 kmovql(k1, k2);
10844 jmp(done);
10845
10846 clear_vector_masking(); // closing of the stub context for programming mask registers
10847 }
10848 if (UseSSE42Intrinsics) {
10849 Label copy_16_loop, copy_8_loop, copy_bytes, copy_new_tail, copy_tail;
10850
10851 movl(tmp2, len);
10852
10853 if (UseAVX > 1) {
10854 andl(tmp2, (16 - 1));
10855 andl(len, -16);
10856 jccb(Assembler::zero, copy_new_tail);
10857 } else {
10858 andl(tmp2, 0x00000007); // tail count (in chars)
10859 andl(len, 0xfffffff8); // vector count (in chars)
10860 jccb(Assembler::zero, copy_tail);
10861 }
10862
10863 // vectored inflation
10864 lea(src, Address(src, len, Address::times_1));
10865 lea(dst, Address(dst, len, Address::times_2));
10866 negptr(len);
10867
10868 if (UseAVX > 1) {
10869 bind(copy_16_loop);
10870 vpmovzxbw(tmp1, Address(src, len, Address::times_1), Assembler::AVX_256bit);
10871 vmovdqu(Address(dst, len, Address::times_2), tmp1);
10872 addptr(len, 16);
10873 jcc(Assembler::notZero, copy_16_loop);
10874
10875 bind(below_threshold);
10876 bind(copy_new_tail);
10877 if ((UseAVX > 2) &&
10878 VM_Version::supports_avx512vlbw() &&
10879 VM_Version::supports_bmi2()) {
10880 movl(tmp2, len);
10881 } else {
10882 movl(len, tmp2);
10883 }
10884 andl(tmp2, 0x00000007);
10885 andl(len, 0xFFFFFFF8);
10886 jccb(Assembler::zero, copy_tail);
10887
10888 pmovzxbw(tmp1, Address(src, 0));
10889 movdqu(Address(dst, 0), tmp1);
10890 addptr(src, 8);
10891 addptr(dst, 2 * 8);
10892
10893 jmp(copy_tail, true);
10894 }
10895
10896 // inflate 8 chars per iter
10897 bind(copy_8_loop);
10898 pmovzxbw(tmp1, Address(src, len, Address::times_1)); // unpack to 8 words
10899 movdqu(Address(dst, len, Address::times_2), tmp1);
10900 addptr(len, 8);
10901 jcc(Assembler::notZero, copy_8_loop);
10902
10903 bind(copy_tail);
10904 movl(len, tmp2);
10905
10906 cmpl(len, 4);
10907 jccb(Assembler::less, copy_bytes);
10908
10909 movdl(tmp1, Address(src, 0)); // load 4 byte chars
10910 pmovzxbw(tmp1, tmp1);
10911 movq(Address(dst, 0), tmp1);
10912 subptr(len, 4);
10913 addptr(src, 4);
10914 addptr(dst, 8);
10915
10916 bind(copy_bytes);
10917 }
10918 testl(len, len);
10919 jccb(Assembler::zero, done);
10920 lea(src, Address(src, len, Address::times_1));
10921 lea(dst, Address(dst, len, Address::times_2));
10922 negptr(len);
10923
10924 // inflate 1 char per iter
10925 bind(copy_chars_loop);
10926 load_unsigned_byte(tmp2, Address(src, len, Address::times_1)); // load byte char
10927 movw(Address(dst, len, Address::times_2), tmp2); // inflate byte char to word
10928 increment(len);
10929 jcc(Assembler::notZero, copy_chars_loop);
10930
10931 bind(done);
10932 }
10933
10934 Assembler::Condition MacroAssembler::negate_condition(Assembler::Condition cond) {
10935 switch (cond) {
10936 // Note some conditions are synonyms for others
10937 case Assembler::zero: return Assembler::notZero;
10938 case Assembler::notZero: return Assembler::zero;
10939 case Assembler::less: return Assembler::greaterEqual;
10940 case Assembler::lessEqual: return Assembler::greater;
10941 case Assembler::greater: return Assembler::lessEqual;
10942 case Assembler::greaterEqual: return Assembler::less;
10943 case Assembler::below: return Assembler::aboveEqual;
10944 case Assembler::belowEqual: return Assembler::above;
10945 case Assembler::above: return Assembler::belowEqual;
10946 case Assembler::aboveEqual: return Assembler::below;
10947 case Assembler::overflow: return Assembler::noOverflow;
10948 case Assembler::noOverflow: return Assembler::overflow;
10949 case Assembler::negative: return Assembler::positive;
10950 case Assembler::positive: return Assembler::negative;
10951 case Assembler::parity: return Assembler::noParity;
10952 case Assembler::noParity: return Assembler::parity;
10953 }
10954 ShouldNotReachHere(); return Assembler::overflow;
10955 }
10956
10957 SkipIfEqual::SkipIfEqual(
10958 MacroAssembler* masm, const bool* flag_addr, bool value) {
10959 _masm = masm;
10960 _masm->cmp8(ExternalAddress((address)flag_addr), value);
10961 _masm->jcc(Assembler::equal, _label);
10962 }
10963
10964 SkipIfEqual::~SkipIfEqual() {
10965 _masm->bind(_label);
10966 }
10967
10968 // 32-bit Windows has its own fast-path implementation
10969 // of get_thread
10970 #if !defined(WIN32) || defined(_LP64)
10971
10972 // This is simply a call to Thread::current()
10973 void MacroAssembler::get_thread(Register thread) {
10974 if (thread != rax) {
10975 push(rax);
10976 }
10977 LP64_ONLY(push(rdi);)
10978 LP64_ONLY(push(rsi);)
10979 push(rdx);
10980 push(rcx);
10981 #ifdef _LP64
10982 push(r8);
10983 push(r9);
10984 push(r10);
10985 push(r11);
10986 #endif
10987
10988 MacroAssembler::call_VM_leaf_base(CAST_FROM_FN_PTR(address, Thread::current), 0);
10989
10990 #ifdef _LP64
10991 pop(r11);
10992 pop(r10);
10993 pop(r9);
10994 pop(r8);
10995 #endif
10996 pop(rcx);
10997 pop(rdx);
10998 LP64_ONLY(pop(rsi);)
10999 LP64_ONLY(pop(rdi);)
11000 if (thread != rax) {
11001 mov(thread, rax);
11002 pop(rax);
11003 }
11004 }
11005
11006 #endif