1 /*
2 * Copyright (c) 1997, 2012, 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 "asm/assembler.hpp"
27 #include "asm/assembler.inline.hpp"
28 #include "compiler/disassembler.hpp"
29 #include "gc_interface/collectedHeap.inline.hpp"
30 #include "interpreter/interpreter.hpp"
31 #include "memory/cardTableModRefBS.hpp"
32 #include "memory/resourceArea.hpp"
33 #include "prims/methodHandles.hpp"
34 #include "runtime/biasedLocking.hpp"
35 #include "runtime/interfaceSupport.hpp"
36 #include "runtime/objectMonitor.hpp"
37 #include "runtime/os.hpp"
38 #include "runtime/sharedRuntime.hpp"
39 #include "runtime/stubRoutines.hpp"
40 #ifndef SERIALGC
41 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
42 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"
43 #include "gc_implementation/g1/heapRegion.hpp"
44 #endif
45
46 #ifdef PRODUCT
47 #define BLOCK_COMMENT(str) /* nothing */
48 #define STOP(error) stop(error)
49 #else
50 #define BLOCK_COMMENT(str) block_comment(str)
51 #define STOP(error) block_comment(error); stop(error)
52 #endif
53
54 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":")
55
56
57 #ifdef ASSERT
58 bool AbstractAssembler::pd_check_instruction_mark() { return true; }
59 #endif
60
61 static Assembler::Condition reverse[] = {
62 Assembler::noOverflow /* overflow = 0x0 */ ,
63 Assembler::overflow /* noOverflow = 0x1 */ ,
64 Assembler::aboveEqual /* carrySet = 0x2, below = 0x2 */ ,
65 Assembler::below /* aboveEqual = 0x3, carryClear = 0x3 */ ,
66 Assembler::notZero /* zero = 0x4, equal = 0x4 */ ,
67 Assembler::zero /* notZero = 0x5, notEqual = 0x5 */ ,
68 Assembler::above /* belowEqual = 0x6 */ ,
69 Assembler::belowEqual /* above = 0x7 */ ,
70 Assembler::positive /* negative = 0x8 */ ,
71 Assembler::negative /* positive = 0x9 */ ,
72 Assembler::noParity /* parity = 0xa */ ,
73 Assembler::parity /* noParity = 0xb */ ,
74 Assembler::greaterEqual /* less = 0xc */ ,
75 Assembler::less /* greaterEqual = 0xd */ ,
76 Assembler::greater /* lessEqual = 0xe */ ,
77 Assembler::lessEqual /* greater = 0xf, */
78
79 };
80
81
82 // Implementation of MacroAssembler
83
84 // First all the versions that have distinct versions depending on 32/64 bit
85 // Unless the difference is trivial (1 line or so).
86
87 #ifndef _LP64
88
89 // 32bit versions
90
91 Address MacroAssembler::as_Address(AddressLiteral adr) {
92 return Address(adr.target(), adr.rspec());
93 }
94
95 Address MacroAssembler::as_Address(ArrayAddress adr) {
96 return Address::make_array(adr);
97 }
98
99 int MacroAssembler::biased_locking_enter(Register lock_reg,
100 Register obj_reg,
101 Register swap_reg,
102 Register tmp_reg,
103 bool swap_reg_contains_mark,
104 Label& done,
105 Label* slow_case,
106 BiasedLockingCounters* counters) {
107 assert(UseBiasedLocking, "why call this otherwise?");
108 assert(swap_reg == rax, "swap_reg must be rax, for cmpxchg");
109 assert_different_registers(lock_reg, obj_reg, swap_reg);
110
111 if (PrintBiasedLockingStatistics && counters == NULL)
112 counters = BiasedLocking::counters();
113
114 bool need_tmp_reg = false;
115 if (tmp_reg == noreg) {
116 need_tmp_reg = true;
117 tmp_reg = lock_reg;
118 } else {
119 assert_different_registers(lock_reg, obj_reg, swap_reg, tmp_reg);
120 }
121 assert(markOopDesc::age_shift == markOopDesc::lock_bits + markOopDesc::biased_lock_bits, "biased locking makes assumptions about bit layout");
122 Address mark_addr (obj_reg, oopDesc::mark_offset_in_bytes());
123 Address klass_addr (obj_reg, oopDesc::klass_offset_in_bytes());
124 Address saved_mark_addr(lock_reg, 0);
125
126 // Biased locking
127 // See whether the lock is currently biased toward our thread and
128 // whether the epoch is still valid
129 // Note that the runtime guarantees sufficient alignment of JavaThread
130 // pointers to allow age to be placed into low bits
131 // First check to see whether biasing is even enabled for this object
132 Label cas_label;
133 int null_check_offset = -1;
134 if (!swap_reg_contains_mark) {
135 null_check_offset = offset();
136 movl(swap_reg, mark_addr);
137 }
138 if (need_tmp_reg) {
139 push(tmp_reg);
140 }
141 movl(tmp_reg, swap_reg);
142 andl(tmp_reg, markOopDesc::biased_lock_mask_in_place);
143 cmpl(tmp_reg, markOopDesc::biased_lock_pattern);
144 if (need_tmp_reg) {
145 pop(tmp_reg);
146 }
147 jcc(Assembler::notEqual, cas_label);
148 // The bias pattern is present in the object's header. Need to check
149 // whether the bias owner and the epoch are both still current.
150 // Note that because there is no current thread register on x86 we
151 // need to store off the mark word we read out of the object to
152 // avoid reloading it and needing to recheck invariants below. This
153 // store is unfortunate but it makes the overall code shorter and
154 // simpler.
155 movl(saved_mark_addr, swap_reg);
156 if (need_tmp_reg) {
157 push(tmp_reg);
158 }
159 get_thread(tmp_reg);
160 xorl(swap_reg, tmp_reg);
161 if (swap_reg_contains_mark) {
162 null_check_offset = offset();
163 }
164 movl(tmp_reg, klass_addr);
165 xorl(swap_reg, Address(tmp_reg, Klass::prototype_header_offset()));
166 andl(swap_reg, ~((int) markOopDesc::age_mask_in_place));
167 if (need_tmp_reg) {
168 pop(tmp_reg);
169 }
170 if (counters != NULL) {
171 cond_inc32(Assembler::zero,
172 ExternalAddress((address)counters->biased_lock_entry_count_addr()));
173 }
174 jcc(Assembler::equal, done);
175
176 Label try_revoke_bias;
177 Label try_rebias;
178
179 // At this point we know that the header has the bias pattern and
180 // that we are not the bias owner in the current epoch. We need to
181 // figure out more details about the state of the header in order to
182 // know what operations can be legally performed on the object's
183 // header.
184
185 // If the low three bits in the xor result aren't clear, that means
186 // the prototype header is no longer biased and we have to revoke
187 // the bias on this object.
188 testl(swap_reg, markOopDesc::biased_lock_mask_in_place);
189 jcc(Assembler::notZero, try_revoke_bias);
190
191 // Biasing is still enabled for this data type. See whether the
192 // epoch of the current bias is still valid, meaning that the epoch
193 // bits of the mark word are equal to the epoch bits of the
194 // prototype header. (Note that the prototype header's epoch bits
195 // only change at a safepoint.) If not, attempt to rebias the object
196 // toward the current thread. Note that we must be absolutely sure
197 // that the current epoch is invalid in order to do this because
198 // otherwise the manipulations it performs on the mark word are
199 // illegal.
200 testl(swap_reg, markOopDesc::epoch_mask_in_place);
201 jcc(Assembler::notZero, try_rebias);
202
203 // The epoch of the current bias is still valid but we know nothing
204 // about the owner; it might be set or it might be clear. Try to
205 // acquire the bias of the object using an atomic operation. If this
206 // fails we will go in to the runtime to revoke the object's bias.
207 // Note that we first construct the presumed unbiased header so we
208 // don't accidentally blow away another thread's valid bias.
209 movl(swap_reg, saved_mark_addr);
210 andl(swap_reg,
211 markOopDesc::biased_lock_mask_in_place | markOopDesc::age_mask_in_place | markOopDesc::epoch_mask_in_place);
212 if (need_tmp_reg) {
213 push(tmp_reg);
214 }
215 get_thread(tmp_reg);
216 orl(tmp_reg, swap_reg);
217 if (os::is_MP()) {
218 lock();
219 }
220 cmpxchgptr(tmp_reg, Address(obj_reg, 0));
221 if (need_tmp_reg) {
222 pop(tmp_reg);
223 }
224 // If the biasing toward our thread failed, this means that
225 // another thread succeeded in biasing it toward itself and we
226 // need to revoke that bias. The revocation will occur in the
227 // interpreter runtime in the slow case.
228 if (counters != NULL) {
229 cond_inc32(Assembler::zero,
230 ExternalAddress((address)counters->anonymously_biased_lock_entry_count_addr()));
231 }
232 if (slow_case != NULL) {
233 jcc(Assembler::notZero, *slow_case);
234 }
235 jmp(done);
236
237 bind(try_rebias);
238 // At this point we know the epoch has expired, meaning that the
239 // current "bias owner", if any, is actually invalid. Under these
240 // circumstances _only_, we are allowed to use the current header's
241 // value as the comparison value when doing the cas to acquire the
242 // bias in the current epoch. In other words, we allow transfer of
243 // the bias from one thread to another directly in this situation.
244 //
245 // FIXME: due to a lack of registers we currently blow away the age
246 // bits in this situation. Should attempt to preserve them.
247 if (need_tmp_reg) {
248 push(tmp_reg);
249 }
250 get_thread(tmp_reg);
251 movl(swap_reg, klass_addr);
252 orl(tmp_reg, Address(swap_reg, Klass::prototype_header_offset()));
253 movl(swap_reg, saved_mark_addr);
254 if (os::is_MP()) {
255 lock();
256 }
257 cmpxchgptr(tmp_reg, Address(obj_reg, 0));
258 if (need_tmp_reg) {
259 pop(tmp_reg);
260 }
261 // If the biasing toward our thread failed, then another thread
262 // succeeded in biasing it toward itself and we need to revoke that
263 // bias. The revocation will occur in the runtime in the slow case.
264 if (counters != NULL) {
265 cond_inc32(Assembler::zero,
266 ExternalAddress((address)counters->rebiased_lock_entry_count_addr()));
267 }
268 if (slow_case != NULL) {
269 jcc(Assembler::notZero, *slow_case);
270 }
271 jmp(done);
272
273 bind(try_revoke_bias);
274 // The prototype mark in the klass doesn't have the bias bit set any
275 // more, indicating that objects of this data type are not supposed
276 // to be biased any more. We are going to try to reset the mark of
277 // this object to the prototype value and fall through to the
278 // CAS-based locking scheme. Note that if our CAS fails, it means
279 // that another thread raced us for the privilege of revoking the
280 // bias of this particular object, so it's okay to continue in the
281 // normal locking code.
282 //
283 // FIXME: due to a lack of registers we currently blow away the age
284 // bits in this situation. Should attempt to preserve them.
285 movl(swap_reg, saved_mark_addr);
286 if (need_tmp_reg) {
287 push(tmp_reg);
288 }
289 movl(tmp_reg, klass_addr);
290 movl(tmp_reg, Address(tmp_reg, Klass::prototype_header_offset()));
291 if (os::is_MP()) {
292 lock();
293 }
294 cmpxchgptr(tmp_reg, Address(obj_reg, 0));
295 if (need_tmp_reg) {
296 pop(tmp_reg);
297 }
298 // Fall through to the normal CAS-based lock, because no matter what
299 // the result of the above CAS, some thread must have succeeded in
300 // removing the bias bit from the object's header.
301 if (counters != NULL) {
302 cond_inc32(Assembler::zero,
303 ExternalAddress((address)counters->revoked_lock_entry_count_addr()));
304 }
305
306 bind(cas_label);
307
308 return null_check_offset;
309 }
310 void MacroAssembler::call_VM_leaf_base(address entry_point,
311 int number_of_arguments) {
312 call(RuntimeAddress(entry_point));
313 increment(rsp, number_of_arguments * wordSize);
314 }
315
316 void MacroAssembler::cmpklass(Address src1, Metadata* obj) {
317 cmp_literal32(src1, (int32_t)obj, metadata_Relocation::spec_for_immediate());
318 }
319
320 void MacroAssembler::cmpklass(Register src1, Metadata* obj) {
321 cmp_literal32(src1, (int32_t)obj, metadata_Relocation::spec_for_immediate());
322 }
323
324 void MacroAssembler::cmpoop(Address src1, jobject obj) {
325 cmp_literal32(src1, (int32_t)obj, oop_Relocation::spec_for_immediate());
326 }
327
328 void MacroAssembler::cmpoop(Register src1, jobject obj) {
329 cmp_literal32(src1, (int32_t)obj, oop_Relocation::spec_for_immediate());
330 }
331
332 void MacroAssembler::extend_sign(Register hi, Register lo) {
333 // According to Intel Doc. AP-526, "Integer Divide", p.18.
334 if (VM_Version::is_P6() && hi == rdx && lo == rax) {
335 cdql();
336 } else {
337 movl(hi, lo);
338 sarl(hi, 31);
339 }
340 }
341
342 void MacroAssembler::jC2(Register tmp, Label& L) {
343 // set parity bit if FPU flag C2 is set (via rax)
344 save_rax(tmp);
345 fwait(); fnstsw_ax();
346 sahf();
347 restore_rax(tmp);
348 // branch
349 jcc(Assembler::parity, L);
350 }
351
352 void MacroAssembler::jnC2(Register tmp, Label& L) {
353 // set parity bit if FPU flag C2 is set (via rax)
354 save_rax(tmp);
355 fwait(); fnstsw_ax();
356 sahf();
357 restore_rax(tmp);
358 // branch
359 jcc(Assembler::noParity, L);
360 }
361
362 // 32bit can do a case table jump in one instruction but we no longer allow the base
363 // to be installed in the Address class
364 void MacroAssembler::jump(ArrayAddress entry) {
365 jmp(as_Address(entry));
366 }
367
368 // Note: y_lo will be destroyed
369 void MacroAssembler::lcmp2int(Register x_hi, Register x_lo, Register y_hi, Register y_lo) {
370 // Long compare for Java (semantics as described in JVM spec.)
371 Label high, low, done;
372
373 cmpl(x_hi, y_hi);
374 jcc(Assembler::less, low);
375 jcc(Assembler::greater, high);
376 // x_hi is the return register
377 xorl(x_hi, x_hi);
378 cmpl(x_lo, y_lo);
379 jcc(Assembler::below, low);
380 jcc(Assembler::equal, done);
381
382 bind(high);
383 xorl(x_hi, x_hi);
384 increment(x_hi);
385 jmp(done);
386
387 bind(low);
388 xorl(x_hi, x_hi);
389 decrementl(x_hi);
390
391 bind(done);
392 }
393
394 void MacroAssembler::lea(Register dst, AddressLiteral src) {
395 mov_literal32(dst, (int32_t)src.target(), src.rspec());
396 }
397
398 void MacroAssembler::lea(Address dst, AddressLiteral adr) {
399 // leal(dst, as_Address(adr));
400 // see note in movl as to why we must use a move
401 mov_literal32(dst, (int32_t) adr.target(), adr.rspec());
402 }
403
404 void MacroAssembler::leave() {
405 mov(rsp, rbp);
406 pop(rbp);
407 }
408
409 void MacroAssembler::lmul(int x_rsp_offset, int y_rsp_offset) {
410 // Multiplication of two Java long values stored on the stack
411 // as illustrated below. Result is in rdx:rax.
412 //
413 // rsp ---> [ ?? ] \ \
414 // .... | y_rsp_offset |
415 // [ y_lo ] / (in bytes) | x_rsp_offset
416 // [ y_hi ] | (in bytes)
417 // .... |
418 // [ x_lo ] /
419 // [ x_hi ]
420 // ....
421 //
422 // Basic idea: lo(result) = lo(x_lo * y_lo)
423 // hi(result) = hi(x_lo * y_lo) + lo(x_hi * y_lo) + lo(x_lo * y_hi)
424 Address x_hi(rsp, x_rsp_offset + wordSize); Address x_lo(rsp, x_rsp_offset);
425 Address y_hi(rsp, y_rsp_offset + wordSize); Address y_lo(rsp, y_rsp_offset);
426 Label quick;
427 // load x_hi, y_hi and check if quick
428 // multiplication is possible
429 movl(rbx, x_hi);
430 movl(rcx, y_hi);
431 movl(rax, rbx);
432 orl(rbx, rcx); // rbx, = 0 <=> x_hi = 0 and y_hi = 0
433 jcc(Assembler::zero, quick); // if rbx, = 0 do quick multiply
434 // do full multiplication
435 // 1st step
436 mull(y_lo); // x_hi * y_lo
437 movl(rbx, rax); // save lo(x_hi * y_lo) in rbx,
438 // 2nd step
439 movl(rax, x_lo);
440 mull(rcx); // x_lo * y_hi
441 addl(rbx, rax); // add lo(x_lo * y_hi) to rbx,
442 // 3rd step
443 bind(quick); // note: rbx, = 0 if quick multiply!
444 movl(rax, x_lo);
445 mull(y_lo); // x_lo * y_lo
446 addl(rdx, rbx); // correct hi(x_lo * y_lo)
447 }
448
449 void MacroAssembler::lneg(Register hi, Register lo) {
450 negl(lo);
451 adcl(hi, 0);
452 negl(hi);
453 }
454
455 void MacroAssembler::lshl(Register hi, Register lo) {
456 // Java shift left long support (semantics as described in JVM spec., p.305)
457 // (basic idea for shift counts s >= n: x << s == (x << n) << (s - n))
458 // shift value is in rcx !
459 assert(hi != rcx, "must not use rcx");
460 assert(lo != rcx, "must not use rcx");
461 const Register s = rcx; // shift count
462 const int n = BitsPerWord;
463 Label L;
464 andl(s, 0x3f); // s := s & 0x3f (s < 0x40)
465 cmpl(s, n); // if (s < n)
466 jcc(Assembler::less, L); // else (s >= n)
467 movl(hi, lo); // x := x << n
468 xorl(lo, lo);
469 // Note: subl(s, n) is not needed since the Intel shift instructions work rcx mod n!
470 bind(L); // s (mod n) < n
471 shldl(hi, lo); // x := x << s
472 shll(lo);
473 }
474
475
476 void MacroAssembler::lshr(Register hi, Register lo, bool sign_extension) {
477 // Java shift right long support (semantics as described in JVM spec., p.306 & p.310)
478 // (basic idea for shift counts s >= n: x >> s == (x >> n) >> (s - n))
479 assert(hi != rcx, "must not use rcx");
480 assert(lo != rcx, "must not use rcx");
481 const Register s = rcx; // shift count
482 const int n = BitsPerWord;
483 Label L;
484 andl(s, 0x3f); // s := s & 0x3f (s < 0x40)
485 cmpl(s, n); // if (s < n)
486 jcc(Assembler::less, L); // else (s >= n)
487 movl(lo, hi); // x := x >> n
488 if (sign_extension) sarl(hi, 31);
489 else xorl(hi, hi);
490 // Note: subl(s, n) is not needed since the Intel shift instructions work rcx mod n!
491 bind(L); // s (mod n) < n
492 shrdl(lo, hi); // x := x >> s
493 if (sign_extension) sarl(hi);
494 else shrl(hi);
495 }
496
497 void MacroAssembler::movoop(Register dst, jobject obj) {
498 mov_literal32(dst, (int32_t)obj, oop_Relocation::spec_for_immediate());
499 }
500
501 void MacroAssembler::movoop(Address dst, jobject obj) {
502 mov_literal32(dst, (int32_t)obj, oop_Relocation::spec_for_immediate());
503 }
504
505 void MacroAssembler::mov_metadata(Register dst, Metadata* obj) {
506 mov_literal32(dst, (int32_t)obj, metadata_Relocation::spec_for_immediate());
507 }
508
509 void MacroAssembler::mov_metadata(Address dst, Metadata* obj) {
510 mov_literal32(dst, (int32_t)obj, metadata_Relocation::spec_for_immediate());
511 }
512
513 void MacroAssembler::movptr(Register dst, AddressLiteral src) {
514 if (src.is_lval()) {
515 mov_literal32(dst, (intptr_t)src.target(), src.rspec());
516 } else {
517 movl(dst, as_Address(src));
518 }
519 }
520
521 void MacroAssembler::movptr(ArrayAddress dst, Register src) {
522 movl(as_Address(dst), src);
523 }
524
525 void MacroAssembler::movptr(Register dst, ArrayAddress src) {
526 movl(dst, as_Address(src));
527 }
528
529 // src should NEVER be a real pointer. Use AddressLiteral for true pointers
530 void MacroAssembler::movptr(Address dst, intptr_t src) {
531 movl(dst, src);
532 }
533
534
535 void MacroAssembler::pop_callee_saved_registers() {
536 pop(rcx);
537 pop(rdx);
538 pop(rdi);
539 pop(rsi);
540 }
541
542 void MacroAssembler::pop_fTOS() {
543 fld_d(Address(rsp, 0));
544 addl(rsp, 2 * wordSize);
545 }
546
547 void MacroAssembler::push_callee_saved_registers() {
548 push(rsi);
549 push(rdi);
550 push(rdx);
551 push(rcx);
552 }
553
554 void MacroAssembler::push_fTOS() {
555 subl(rsp, 2 * wordSize);
556 fstp_d(Address(rsp, 0));
557 }
558
559
560 void MacroAssembler::pushoop(jobject obj) {
561 push_literal32((int32_t)obj, oop_Relocation::spec_for_immediate());
562 }
563
564 void MacroAssembler::pushklass(Metadata* obj) {
565 push_literal32((int32_t)obj, metadata_Relocation::spec_for_immediate());
566 }
567
568 void MacroAssembler::pushptr(AddressLiteral src) {
569 if (src.is_lval()) {
570 push_literal32((int32_t)src.target(), src.rspec());
571 } else {
572 pushl(as_Address(src));
573 }
574 }
575
576 void MacroAssembler::set_word_if_not_zero(Register dst) {
577 xorl(dst, dst);
578 set_byte_if_not_zero(dst);
579 }
580
581 static void pass_arg0(MacroAssembler* masm, Register arg) {
582 masm->push(arg);
583 }
584
585 static void pass_arg1(MacroAssembler* masm, Register arg) {
586 masm->push(arg);
587 }
588
589 static void pass_arg2(MacroAssembler* masm, Register arg) {
590 masm->push(arg);
591 }
592
593 static void pass_arg3(MacroAssembler* masm, Register arg) {
594 masm->push(arg);
595 }
596
597 #ifndef PRODUCT
598 extern "C" void findpc(intptr_t x);
599 #endif
600
601 void MacroAssembler::debug32(int rdi, int rsi, int rbp, int rsp, int rbx, int rdx, int rcx, int rax, int eip, char* msg) {
602 // In order to get locks to work, we need to fake a in_VM state
603 JavaThread* thread = JavaThread::current();
604 JavaThreadState saved_state = thread->thread_state();
605 thread->set_thread_state(_thread_in_vm);
606 if (ShowMessageBoxOnError) {
607 JavaThread* thread = JavaThread::current();
608 JavaThreadState saved_state = thread->thread_state();
609 thread->set_thread_state(_thread_in_vm);
610 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
611 ttyLocker ttyl;
612 BytecodeCounter::print();
613 }
614 // To see where a verify_oop failed, get $ebx+40/X for this frame.
615 // This is the value of eip which points to where verify_oop will return.
616 if (os::message_box(msg, "Execution stopped, print registers?")) {
617 print_state32(rdi, rsi, rbp, rsp, rbx, rdx, rcx, rax, eip);
618 BREAKPOINT;
619 }
620 } else {
621 ttyLocker ttyl;
622 ::tty->print_cr("=============== DEBUG MESSAGE: %s ================\n", msg);
623 }
624 // Don't assert holding the ttyLock
625 assert(false, err_msg("DEBUG MESSAGE: %s", msg));
626 ThreadStateTransition::transition(thread, _thread_in_vm, saved_state);
627 }
628
629 void MacroAssembler::print_state32(int rdi, int rsi, int rbp, int rsp, int rbx, int rdx, int rcx, int rax, int eip) {
630 ttyLocker ttyl;
631 FlagSetting fs(Debugging, true);
632 tty->print_cr("eip = 0x%08x", eip);
633 #ifndef PRODUCT
634 if ((WizardMode || Verbose) && PrintMiscellaneous) {
635 tty->cr();
636 findpc(eip);
637 tty->cr();
638 }
639 #endif
640 #define PRINT_REG(rax) \
641 { tty->print("%s = ", #rax); os::print_location(tty, rax); }
642 PRINT_REG(rax);
643 PRINT_REG(rbx);
644 PRINT_REG(rcx);
645 PRINT_REG(rdx);
646 PRINT_REG(rdi);
647 PRINT_REG(rsi);
648 PRINT_REG(rbp);
649 PRINT_REG(rsp);
650 #undef PRINT_REG
651 // Print some words near top of staack.
652 int* dump_sp = (int*) rsp;
653 for (int col1 = 0; col1 < 8; col1++) {
654 tty->print("(rsp+0x%03x) 0x%08x: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp);
655 os::print_location(tty, *dump_sp++);
656 }
657 for (int row = 0; row < 16; row++) {
658 tty->print("(rsp+0x%03x) 0x%08x: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp);
659 for (int col = 0; col < 8; col++) {
660 tty->print(" 0x%08x", *dump_sp++);
661 }
662 tty->cr();
663 }
664 // Print some instructions around pc:
665 Disassembler::decode((address)eip-64, (address)eip);
666 tty->print_cr("--------");
667 Disassembler::decode((address)eip, (address)eip+32);
668 }
669
670 void MacroAssembler::stop(const char* msg) {
671 ExternalAddress message((address)msg);
672 // push address of message
673 pushptr(message.addr());
674 { Label L; call(L, relocInfo::none); bind(L); } // push eip
675 pusha(); // push registers
676 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug32)));
677 hlt();
678 }
679
680 void MacroAssembler::warn(const char* msg) {
681 push_CPU_state();
682
683 ExternalAddress message((address) msg);
684 // push address of message
685 pushptr(message.addr());
686
687 call(RuntimeAddress(CAST_FROM_FN_PTR(address, warning)));
688 addl(rsp, wordSize); // discard argument
689 pop_CPU_state();
690 }
691
692 void MacroAssembler::print_state() {
693 { Label L; call(L, relocInfo::none); bind(L); } // push eip
694 pusha(); // push registers
695
696 push_CPU_state();
697 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::print_state32)));
698 pop_CPU_state();
699
700 popa();
701 addl(rsp, wordSize);
702 }
703
704 #else // _LP64
705
706 // 64 bit versions
707
708 Address MacroAssembler::as_Address(AddressLiteral adr) {
709 // amd64 always does this as a pc-rel
710 // we can be absolute or disp based on the instruction type
711 // jmp/call are displacements others are absolute
712 assert(!adr.is_lval(), "must be rval");
713 assert(reachable(adr), "must be");
714 return Address((int32_t)(intptr_t)(adr.target() - pc()), adr.target(), adr.reloc());
715
716 }
717
718 Address MacroAssembler::as_Address(ArrayAddress adr) {
719 AddressLiteral base = adr.base();
720 lea(rscratch1, base);
721 Address index = adr.index();
722 assert(index._disp == 0, "must not have disp"); // maybe it can?
723 Address array(rscratch1, index._index, index._scale, index._disp);
724 return array;
725 }
726
727 int MacroAssembler::biased_locking_enter(Register lock_reg,
728 Register obj_reg,
729 Register swap_reg,
730 Register tmp_reg,
731 bool swap_reg_contains_mark,
732 Label& done,
733 Label* slow_case,
734 BiasedLockingCounters* counters) {
735 assert(UseBiasedLocking, "why call this otherwise?");
736 assert(swap_reg == rax, "swap_reg must be rax for cmpxchgq");
737 assert(tmp_reg != noreg, "tmp_reg must be supplied");
738 assert_different_registers(lock_reg, obj_reg, swap_reg, tmp_reg);
739 assert(markOopDesc::age_shift == markOopDesc::lock_bits + markOopDesc::biased_lock_bits, "biased locking makes assumptions about bit layout");
740 Address mark_addr (obj_reg, oopDesc::mark_offset_in_bytes());
741 Address saved_mark_addr(lock_reg, 0);
742
743 if (PrintBiasedLockingStatistics && counters == NULL)
744 counters = BiasedLocking::counters();
745
746 // Biased locking
747 // See whether the lock is currently biased toward our thread and
748 // whether the epoch is still valid
749 // Note that the runtime guarantees sufficient alignment of JavaThread
750 // pointers to allow age to be placed into low bits
751 // First check to see whether biasing is even enabled for this object
752 Label cas_label;
753 int null_check_offset = -1;
754 if (!swap_reg_contains_mark) {
755 null_check_offset = offset();
756 movq(swap_reg, mark_addr);
757 }
758 movq(tmp_reg, swap_reg);
759 andq(tmp_reg, markOopDesc::biased_lock_mask_in_place);
760 cmpq(tmp_reg, markOopDesc::biased_lock_pattern);
761 jcc(Assembler::notEqual, cas_label);
762 // The bias pattern is present in the object's header. Need to check
763 // whether the bias owner and the epoch are both still current.
764 load_prototype_header(tmp_reg, obj_reg);
765 orq(tmp_reg, r15_thread);
766 xorq(tmp_reg, swap_reg);
767 andq(tmp_reg, ~((int) markOopDesc::age_mask_in_place));
768 if (counters != NULL) {
769 cond_inc32(Assembler::zero,
770 ExternalAddress((address) counters->anonymously_biased_lock_entry_count_addr()));
771 }
772 jcc(Assembler::equal, done);
773
774 Label try_revoke_bias;
775 Label try_rebias;
776
777 // At this point we know that the header has the bias pattern and
778 // that we are not the bias owner in the current epoch. We need to
779 // figure out more details about the state of the header in order to
780 // know what operations can be legally performed on the object's
781 // header.
782
783 // If the low three bits in the xor result aren't clear, that means
784 // the prototype header is no longer biased and we have to revoke
785 // the bias on this object.
786 testq(tmp_reg, markOopDesc::biased_lock_mask_in_place);
787 jcc(Assembler::notZero, try_revoke_bias);
788
789 // Biasing is still enabled for this data type. See whether the
790 // epoch of the current bias is still valid, meaning that the epoch
791 // bits of the mark word are equal to the epoch bits of the
792 // prototype header. (Note that the prototype header's epoch bits
793 // only change at a safepoint.) If not, attempt to rebias the object
794 // toward the current thread. Note that we must be absolutely sure
795 // that the current epoch is invalid in order to do this because
796 // otherwise the manipulations it performs on the mark word are
797 // illegal.
798 testq(tmp_reg, markOopDesc::epoch_mask_in_place);
799 jcc(Assembler::notZero, try_rebias);
800
801 // The epoch of the current bias is still valid but we know nothing
802 // about the owner; it might be set or it might be clear. Try to
803 // acquire the bias of the object using an atomic operation. If this
804 // fails we will go in to the runtime to revoke the object's bias.
805 // Note that we first construct the presumed unbiased header so we
806 // don't accidentally blow away another thread's valid bias.
807 andq(swap_reg,
808 markOopDesc::biased_lock_mask_in_place | markOopDesc::age_mask_in_place | markOopDesc::epoch_mask_in_place);
809 movq(tmp_reg, swap_reg);
810 orq(tmp_reg, r15_thread);
811 if (os::is_MP()) {
812 lock();
813 }
814 cmpxchgq(tmp_reg, Address(obj_reg, 0));
815 // If the biasing toward our thread failed, this means that
816 // another thread succeeded in biasing it toward itself and we
817 // need to revoke that bias. The revocation will occur in the
818 // interpreter runtime in the slow case.
819 if (counters != NULL) {
820 cond_inc32(Assembler::zero,
821 ExternalAddress((address) counters->anonymously_biased_lock_entry_count_addr()));
822 }
823 if (slow_case != NULL) {
824 jcc(Assembler::notZero, *slow_case);
825 }
826 jmp(done);
827
828 bind(try_rebias);
829 // At this point we know the epoch has expired, meaning that the
830 // current "bias owner", if any, is actually invalid. Under these
831 // circumstances _only_, we are allowed to use the current header's
832 // value as the comparison value when doing the cas to acquire the
833 // bias in the current epoch. In other words, we allow transfer of
834 // the bias from one thread to another directly in this situation.
835 //
836 // FIXME: due to a lack of registers we currently blow away the age
837 // bits in this situation. Should attempt to preserve them.
838 load_prototype_header(tmp_reg, obj_reg);
839 orq(tmp_reg, r15_thread);
840 if (os::is_MP()) {
841 lock();
842 }
843 cmpxchgq(tmp_reg, Address(obj_reg, 0));
844 // If the biasing toward our thread failed, then another thread
845 // succeeded in biasing it toward itself and we need to revoke that
846 // bias. The revocation will occur in the runtime in the slow case.
847 if (counters != NULL) {
848 cond_inc32(Assembler::zero,
849 ExternalAddress((address) counters->rebiased_lock_entry_count_addr()));
850 }
851 if (slow_case != NULL) {
852 jcc(Assembler::notZero, *slow_case);
853 }
854 jmp(done);
855
856 bind(try_revoke_bias);
857 // The prototype mark in the klass doesn't have the bias bit set any
858 // more, indicating that objects of this data type are not supposed
859 // to be biased any more. We are going to try to reset the mark of
860 // this object to the prototype value and fall through to the
861 // CAS-based locking scheme. Note that if our CAS fails, it means
862 // that another thread raced us for the privilege of revoking the
863 // bias of this particular object, so it's okay to continue in the
864 // normal locking code.
865 //
866 // FIXME: due to a lack of registers we currently blow away the age
867 // bits in this situation. Should attempt to preserve them.
868 load_prototype_header(tmp_reg, obj_reg);
869 if (os::is_MP()) {
870 lock();
871 }
872 cmpxchgq(tmp_reg, Address(obj_reg, 0));
873 // Fall through to the normal CAS-based lock, because no matter what
874 // the result of the above CAS, some thread must have succeeded in
875 // removing the bias bit from the object's header.
876 if (counters != NULL) {
877 cond_inc32(Assembler::zero,
878 ExternalAddress((address) counters->revoked_lock_entry_count_addr()));
879 }
880
881 bind(cas_label);
882
883 return null_check_offset;
884 }
885
886 void MacroAssembler::call_VM_leaf_base(address entry_point, int num_args) {
887 Label L, E;
888
889 #ifdef _WIN64
890 // Windows always allocates space for it's register args
891 assert(num_args <= 4, "only register arguments supported");
892 subq(rsp, frame::arg_reg_save_area_bytes);
893 #endif
894
895 // Align stack if necessary
896 testl(rsp, 15);
897 jcc(Assembler::zero, L);
898
899 subq(rsp, 8);
900 {
901 call(RuntimeAddress(entry_point));
902 }
903 addq(rsp, 8);
904 jmp(E);
905
906 bind(L);
907 {
908 call(RuntimeAddress(entry_point));
909 }
910
911 bind(E);
912
913 #ifdef _WIN64
914 // restore stack pointer
915 addq(rsp, frame::arg_reg_save_area_bytes);
916 #endif
917
918 }
919
920 void MacroAssembler::cmp64(Register src1, AddressLiteral src2) {
921 assert(!src2.is_lval(), "should use cmpptr");
922
923 if (reachable(src2)) {
924 cmpq(src1, as_Address(src2));
925 } else {
926 lea(rscratch1, src2);
927 Assembler::cmpq(src1, Address(rscratch1, 0));
928 }
929 }
930
931 int MacroAssembler::corrected_idivq(Register reg) {
932 // Full implementation of Java ldiv and lrem; checks for special
933 // case as described in JVM spec., p.243 & p.271. The function
934 // returns the (pc) offset of the idivl instruction - may be needed
935 // for implicit exceptions.
936 //
937 // normal case special case
938 //
939 // input : rax: dividend min_long
940 // reg: divisor (may not be eax/edx) -1
941 //
942 // output: rax: quotient (= rax idiv reg) min_long
943 // rdx: remainder (= rax irem reg) 0
944 assert(reg != rax && reg != rdx, "reg cannot be rax or rdx register");
945 static const int64_t min_long = 0x8000000000000000;
946 Label normal_case, special_case;
947
948 // check for special case
949 cmp64(rax, ExternalAddress((address) &min_long));
950 jcc(Assembler::notEqual, normal_case);
951 xorl(rdx, rdx); // prepare rdx for possible special case (where
952 // remainder = 0)
953 cmpq(reg, -1);
954 jcc(Assembler::equal, special_case);
955
956 // handle normal case
957 bind(normal_case);
958 cdqq();
959 int idivq_offset = offset();
960 idivq(reg);
961
962 // normal and special case exit
963 bind(special_case);
964
965 return idivq_offset;
966 }
967
968 void MacroAssembler::decrementq(Register reg, int value) {
969 if (value == min_jint) { subq(reg, value); return; }
970 if (value < 0) { incrementq(reg, -value); return; }
971 if (value == 0) { ; return; }
972 if (value == 1 && UseIncDec) { decq(reg) ; return; }
973 /* else */ { subq(reg, value) ; return; }
974 }
975
976 void MacroAssembler::decrementq(Address dst, int value) {
977 if (value == min_jint) { subq(dst, value); return; }
978 if (value < 0) { incrementq(dst, -value); return; }
979 if (value == 0) { ; return; }
980 if (value == 1 && UseIncDec) { decq(dst) ; return; }
981 /* else */ { subq(dst, value) ; return; }
982 }
983
984 void MacroAssembler::incrementq(Register reg, int value) {
985 if (value == min_jint) { addq(reg, value); return; }
986 if (value < 0) { decrementq(reg, -value); return; }
987 if (value == 0) { ; return; }
988 if (value == 1 && UseIncDec) { incq(reg) ; return; }
989 /* else */ { addq(reg, value) ; return; }
990 }
991
992 void MacroAssembler::incrementq(Address dst, int value) {
993 if (value == min_jint) { addq(dst, value); return; }
994 if (value < 0) { decrementq(dst, -value); return; }
995 if (value == 0) { ; return; }
996 if (value == 1 && UseIncDec) { incq(dst) ; return; }
997 /* else */ { addq(dst, value) ; return; }
998 }
999
1000 // 32bit can do a case table jump in one instruction but we no longer allow the base
1001 // to be installed in the Address class
1002 void MacroAssembler::jump(ArrayAddress entry) {
1003 lea(rscratch1, entry.base());
1004 Address dispatch = entry.index();
1005 assert(dispatch._base == noreg, "must be");
1006 dispatch._base = rscratch1;
1007 jmp(dispatch);
1008 }
1009
1010 void MacroAssembler::lcmp2int(Register x_hi, Register x_lo, Register y_hi, Register y_lo) {
1011 ShouldNotReachHere(); // 64bit doesn't use two regs
1012 cmpq(x_lo, y_lo);
1013 }
1014
1015 void MacroAssembler::lea(Register dst, AddressLiteral src) {
1016 mov_literal64(dst, (intptr_t)src.target(), src.rspec());
1017 }
1018
1019 void MacroAssembler::lea(Address dst, AddressLiteral adr) {
1020 mov_literal64(rscratch1, (intptr_t)adr.target(), adr.rspec());
1021 movptr(dst, rscratch1);
1022 }
1023
1024 void MacroAssembler::leave() {
1025 // %%% is this really better? Why not on 32bit too?
1026 emit_byte(0xC9); // LEAVE
1027 }
1028
1029 void MacroAssembler::lneg(Register hi, Register lo) {
1030 ShouldNotReachHere(); // 64bit doesn't use two regs
1031 negq(lo);
1032 }
1033
1034 void MacroAssembler::movoop(Register dst, jobject obj) {
1035 mov_literal64(dst, (intptr_t)obj, oop_Relocation::spec_for_immediate());
1036 }
1037
1038 void MacroAssembler::movoop(Address dst, jobject obj) {
1039 mov_literal64(rscratch1, (intptr_t)obj, oop_Relocation::spec_for_immediate());
1040 movq(dst, rscratch1);
1041 }
1042
1043 void MacroAssembler::mov_metadata(Register dst, Metadata* obj) {
1044 mov_literal64(dst, (intptr_t)obj, metadata_Relocation::spec_for_immediate());
1045 }
1046
1047 void MacroAssembler::mov_metadata(Address dst, Metadata* obj) {
1048 mov_literal64(rscratch1, (intptr_t)obj, metadata_Relocation::spec_for_immediate());
1049 movq(dst, rscratch1);
1050 }
1051
1052 void MacroAssembler::movptr(Register dst, AddressLiteral src) {
1053 if (src.is_lval()) {
1054 mov_literal64(dst, (intptr_t)src.target(), src.rspec());
1055 } else {
1056 if (reachable(src)) {
1057 movq(dst, as_Address(src));
1058 } else {
1059 lea(rscratch1, src);
1060 movq(dst, Address(rscratch1,0));
1061 }
1062 }
1063 }
1064
1065 void MacroAssembler::movptr(ArrayAddress dst, Register src) {
1066 movq(as_Address(dst), src);
1067 }
1068
1069 void MacroAssembler::movptr(Register dst, ArrayAddress src) {
1070 movq(dst, as_Address(src));
1071 }
1072
1073 // src should NEVER be a real pointer. Use AddressLiteral for true pointers
1074 void MacroAssembler::movptr(Address dst, intptr_t src) {
1075 mov64(rscratch1, src);
1076 movq(dst, rscratch1);
1077 }
1078
1079 // These are mostly for initializing NULL
1080 void MacroAssembler::movptr(Address dst, int32_t src) {
1081 movslq(dst, src);
1082 }
1083
1084 void MacroAssembler::movptr(Register dst, int32_t src) {
1085 mov64(dst, (intptr_t)src);
1086 }
1087
1088 void MacroAssembler::pushoop(jobject obj) {
1089 movoop(rscratch1, obj);
1090 push(rscratch1);
1091 }
1092
1093 void MacroAssembler::pushklass(Metadata* obj) {
1094 mov_metadata(rscratch1, obj);
1095 push(rscratch1);
1096 }
1097
1098 void MacroAssembler::pushptr(AddressLiteral src) {
1099 lea(rscratch1, src);
1100 if (src.is_lval()) {
1101 push(rscratch1);
1102 } else {
1103 pushq(Address(rscratch1, 0));
1104 }
1105 }
1106
1107 void MacroAssembler::reset_last_Java_frame(bool clear_fp,
1108 bool clear_pc) {
1109 // we must set sp to zero to clear frame
1110 movptr(Address(r15_thread, JavaThread::last_Java_sp_offset()), NULL_WORD);
1111 // must clear fp, so that compiled frames are not confused; it is
1112 // possible that we need it only for debugging
1113 if (clear_fp) {
1114 movptr(Address(r15_thread, JavaThread::last_Java_fp_offset()), NULL_WORD);
1115 }
1116
1117 if (clear_pc) {
1118 movptr(Address(r15_thread, JavaThread::last_Java_pc_offset()), NULL_WORD);
1119 }
1120 }
1121
1122 void MacroAssembler::set_last_Java_frame(Register last_java_sp,
1123 Register last_java_fp,
1124 address last_java_pc) {
1125 // determine last_java_sp register
1126 if (!last_java_sp->is_valid()) {
1127 last_java_sp = rsp;
1128 }
1129
1130 // last_java_fp is optional
1131 if (last_java_fp->is_valid()) {
1132 movptr(Address(r15_thread, JavaThread::last_Java_fp_offset()),
1133 last_java_fp);
1134 }
1135
1136 // last_java_pc is optional
1137 if (last_java_pc != NULL) {
1138 Address java_pc(r15_thread,
1139 JavaThread::frame_anchor_offset() + JavaFrameAnchor::last_Java_pc_offset());
1140 lea(rscratch1, InternalAddress(last_java_pc));
1141 movptr(java_pc, rscratch1);
1142 }
1143
1144 movptr(Address(r15_thread, JavaThread::last_Java_sp_offset()), last_java_sp);
1145 }
1146
1147 static void pass_arg0(MacroAssembler* masm, Register arg) {
1148 if (c_rarg0 != arg ) {
1149 masm->mov(c_rarg0, arg);
1150 }
1151 }
1152
1153 static void pass_arg1(MacroAssembler* masm, Register arg) {
1154 if (c_rarg1 != arg ) {
1155 masm->mov(c_rarg1, arg);
1156 }
1157 }
1158
1159 static void pass_arg2(MacroAssembler* masm, Register arg) {
1160 if (c_rarg2 != arg ) {
1161 masm->mov(c_rarg2, arg);
1162 }
1163 }
1164
1165 static void pass_arg3(MacroAssembler* masm, Register arg) {
1166 if (c_rarg3 != arg ) {
1167 masm->mov(c_rarg3, arg);
1168 }
1169 }
1170
1171 void MacroAssembler::stop(const char* msg) {
1172 address rip = pc();
1173 pusha(); // get regs on stack
1174 lea(c_rarg0, ExternalAddress((address) msg));
1175 lea(c_rarg1, InternalAddress(rip));
1176 movq(c_rarg2, rsp); // pass pointer to regs array
1177 andq(rsp, -16); // align stack as required by ABI
1178 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug64)));
1179 hlt();
1180 }
1181
1182 void MacroAssembler::warn(const char* msg) {
1183 push(rbp);
1184 movq(rbp, rsp);
1185 andq(rsp, -16); // align stack as required by push_CPU_state and call
1186 push_CPU_state(); // keeps alignment at 16 bytes
1187 lea(c_rarg0, ExternalAddress((address) msg));
1188 call_VM_leaf(CAST_FROM_FN_PTR(address, warning), c_rarg0);
1189 pop_CPU_state();
1190 mov(rsp, rbp);
1191 pop(rbp);
1192 }
1193
1194 void MacroAssembler::print_state() {
1195 address rip = pc();
1196 pusha(); // get regs on stack
1197 push(rbp);
1198 movq(rbp, rsp);
1199 andq(rsp, -16); // align stack as required by push_CPU_state and call
1200 push_CPU_state(); // keeps alignment at 16 bytes
1201
1202 lea(c_rarg0, InternalAddress(rip));
1203 lea(c_rarg1, Address(rbp, wordSize)); // pass pointer to regs array
1204 call_VM_leaf(CAST_FROM_FN_PTR(address, MacroAssembler::print_state64), c_rarg0, c_rarg1);
1205
1206 pop_CPU_state();
1207 mov(rsp, rbp);
1208 pop(rbp);
1209 popa();
1210 }
1211
1212 #ifndef PRODUCT
1213 extern "C" void findpc(intptr_t x);
1214 #endif
1215
1216 void MacroAssembler::debug64(char* msg, int64_t pc, int64_t regs[]) {
1217 // In order to get locks to work, we need to fake a in_VM state
1218 if (ShowMessageBoxOnError) {
1219 JavaThread* thread = JavaThread::current();
1220 JavaThreadState saved_state = thread->thread_state();
1221 thread->set_thread_state(_thread_in_vm);
1222 #ifndef PRODUCT
1223 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
1224 ttyLocker ttyl;
1225 BytecodeCounter::print();
1226 }
1227 #endif
1228 // To see where a verify_oop failed, get $ebx+40/X for this frame.
1229 // XXX correct this offset for amd64
1230 // This is the value of eip which points to where verify_oop will return.
1231 if (os::message_box(msg, "Execution stopped, print registers?")) {
1232 print_state64(pc, regs);
1233 BREAKPOINT;
1234 assert(false, "start up GDB");
1235 }
1236 ThreadStateTransition::transition(thread, _thread_in_vm, saved_state);
1237 } else {
1238 ttyLocker ttyl;
1239 ::tty->print_cr("=============== DEBUG MESSAGE: %s ================\n",
1240 msg);
1241 assert(false, err_msg("DEBUG MESSAGE: %s", msg));
1242 }
1243 }
1244
1245 void MacroAssembler::print_state64(int64_t pc, int64_t regs[]) {
1246 ttyLocker ttyl;
1247 FlagSetting fs(Debugging, true);
1248 tty->print_cr("rip = 0x%016lx", pc);
1249 #ifndef PRODUCT
1250 tty->cr();
1251 findpc(pc);
1252 tty->cr();
1253 #endif
1254 #define PRINT_REG(rax, value) \
1255 { tty->print("%s = ", #rax); os::print_location(tty, value); }
1256 PRINT_REG(rax, regs[15]);
1257 PRINT_REG(rbx, regs[12]);
1258 PRINT_REG(rcx, regs[14]);
1259 PRINT_REG(rdx, regs[13]);
1260 PRINT_REG(rdi, regs[8]);
1261 PRINT_REG(rsi, regs[9]);
1262 PRINT_REG(rbp, regs[10]);
1263 PRINT_REG(rsp, regs[11]);
1264 PRINT_REG(r8 , regs[7]);
1265 PRINT_REG(r9 , regs[6]);
1266 PRINT_REG(r10, regs[5]);
1267 PRINT_REG(r11, regs[4]);
1268 PRINT_REG(r12, regs[3]);
1269 PRINT_REG(r13, regs[2]);
1270 PRINT_REG(r14, regs[1]);
1271 PRINT_REG(r15, regs[0]);
1272 #undef PRINT_REG
1273 // Print some words near top of staack.
1274 int64_t* rsp = (int64_t*) regs[11];
1275 int64_t* dump_sp = rsp;
1276 for (int col1 = 0; col1 < 8; col1++) {
1277 tty->print("(rsp+0x%03x) 0x%016lx: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (int64_t)dump_sp);
1278 os::print_location(tty, *dump_sp++);
1279 }
1280 for (int row = 0; row < 25; row++) {
1281 tty->print("(rsp+0x%03x) 0x%016lx: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (int64_t)dump_sp);
1282 for (int col = 0; col < 4; col++) {
1283 tty->print(" 0x%016lx", *dump_sp++);
1284 }
1285 tty->cr();
1286 }
1287 // Print some instructions around pc:
1288 Disassembler::decode((address)pc-64, (address)pc);
1289 tty->print_cr("--------");
1290 Disassembler::decode((address)pc, (address)pc+32);
1291 }
1292
1293 #endif // _LP64
1294
1295 // Now versions that are common to 32/64 bit
1296
1297 void MacroAssembler::addptr(Register dst, int32_t imm32) {
1298 LP64_ONLY(addq(dst, imm32)) NOT_LP64(addl(dst, imm32));
1299 }
1300
1301 void MacroAssembler::addptr(Register dst, Register src) {
1302 LP64_ONLY(addq(dst, src)) NOT_LP64(addl(dst, src));
1303 }
1304
1305 void MacroAssembler::addptr(Address dst, Register src) {
1306 LP64_ONLY(addq(dst, src)) NOT_LP64(addl(dst, src));
1307 }
1308
1309 void MacroAssembler::addsd(XMMRegister dst, AddressLiteral src) {
1310 if (reachable(src)) {
1311 Assembler::addsd(dst, as_Address(src));
1312 } else {
1313 lea(rscratch1, src);
1314 Assembler::addsd(dst, Address(rscratch1, 0));
1315 }
1316 }
1317
1318 void MacroAssembler::addss(XMMRegister dst, AddressLiteral src) {
1319 if (reachable(src)) {
1320 addss(dst, as_Address(src));
1321 } else {
1322 lea(rscratch1, src);
1323 addss(dst, Address(rscratch1, 0));
1324 }
1325 }
1326
1327 void MacroAssembler::align(int modulus) {
1328 if (offset() % modulus != 0) {
1329 nop(modulus - (offset() % modulus));
1330 }
1331 }
1332
1333 void MacroAssembler::andpd(XMMRegister dst, AddressLiteral src) {
1334 // Used in sign-masking with aligned address.
1335 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes");
1336 if (reachable(src)) {
1337 Assembler::andpd(dst, as_Address(src));
1338 } else {
1339 lea(rscratch1, src);
1340 Assembler::andpd(dst, Address(rscratch1, 0));
1341 }
1342 }
1343
1344 void MacroAssembler::andps(XMMRegister dst, AddressLiteral src) {
1345 // Used in sign-masking with aligned address.
1346 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes");
1347 if (reachable(src)) {
1348 Assembler::andps(dst, as_Address(src));
1349 } else {
1350 lea(rscratch1, src);
1351 Assembler::andps(dst, Address(rscratch1, 0));
1352 }
1353 }
1354
1355 void MacroAssembler::andptr(Register dst, int32_t imm32) {
1356 LP64_ONLY(andq(dst, imm32)) NOT_LP64(andl(dst, imm32));
1357 }
1358
1359 void MacroAssembler::atomic_incl(AddressLiteral counter_addr) {
1360 pushf();
1361 if (os::is_MP())
1362 lock();
1363 incrementl(counter_addr);
1364 popf();
1365 }
1366
1367 // Writes to stack successive pages until offset reached to check for
1368 // stack overflow + shadow pages. This clobbers tmp.
1369 void MacroAssembler::bang_stack_size(Register size, Register tmp) {
1370 movptr(tmp, rsp);
1371 // Bang stack for total size given plus shadow page size.
1372 // Bang one page at a time because large size can bang beyond yellow and
1373 // red zones.
1374 Label loop;
1375 bind(loop);
1376 movl(Address(tmp, (-os::vm_page_size())), size );
1377 subptr(tmp, os::vm_page_size());
1378 subl(size, os::vm_page_size());
1379 jcc(Assembler::greater, loop);
1380
1381 // Bang down shadow pages too.
1382 // The -1 because we already subtracted 1 page.
1383 for (int i = 0; i< StackShadowPages-1; i++) {
1384 // this could be any sized move but this is can be a debugging crumb
1385 // so the bigger the better.
1386 movptr(Address(tmp, (-i*os::vm_page_size())), size );
1387 }
1388 }
1389
1390 void MacroAssembler::biased_locking_exit(Register obj_reg, Register temp_reg, Label& done) {
1391 assert(UseBiasedLocking, "why call this otherwise?");
1392
1393 // Check for biased locking unlock case, which is a no-op
1394 // Note: we do not have to check the thread ID for two reasons.
1395 // First, the interpreter checks for IllegalMonitorStateException at
1396 // a higher level. Second, if the bias was revoked while we held the
1397 // lock, the object could not be rebiased toward another thread, so
1398 // the bias bit would be clear.
1399 movptr(temp_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1400 andptr(temp_reg, markOopDesc::biased_lock_mask_in_place);
1401 cmpptr(temp_reg, markOopDesc::biased_lock_pattern);
1402 jcc(Assembler::equal, done);
1403 }
1404
1405 void MacroAssembler::c2bool(Register x) {
1406 // implements x == 0 ? 0 : 1
1407 // note: must only look at least-significant byte of x
1408 // since C-style booleans are stored in one byte
1409 // only! (was bug)
1410 andl(x, 0xFF);
1411 setb(Assembler::notZero, x);
1412 }
1413
1414 // Wouldn't need if AddressLiteral version had new name
1415 void MacroAssembler::call(Label& L, relocInfo::relocType rtype) {
1416 Assembler::call(L, rtype);
1417 }
1418
1419 void MacroAssembler::call(Register entry) {
1420 Assembler::call(entry);
1421 }
1422
1423 void MacroAssembler::call(AddressLiteral entry) {
1424 if (reachable(entry)) {
1425 Assembler::call_literal(entry.target(), entry.rspec());
1426 } else {
1427 lea(rscratch1, entry);
1428 Assembler::call(rscratch1);
1429 }
1430 }
1431
1432 void MacroAssembler::ic_call(address entry) {
1433 RelocationHolder rh = virtual_call_Relocation::spec(pc());
1434 movptr(rax, (intptr_t)Universe::non_oop_word());
1435 call(AddressLiteral(entry, rh));
1436 }
1437
1438 // Implementation of call_VM versions
1439
1440 void MacroAssembler::call_VM(Register oop_result,
1441 address entry_point,
1442 bool check_exceptions) {
1443 Label C, E;
1444 call(C, relocInfo::none);
1445 jmp(E);
1446
1447 bind(C);
1448 call_VM_helper(oop_result, entry_point, 0, check_exceptions);
1449 ret(0);
1450
1451 bind(E);
1452 }
1453
1454 void MacroAssembler::call_VM(Register oop_result,
1455 address entry_point,
1456 Register arg_1,
1457 bool check_exceptions) {
1458 Label C, E;
1459 call(C, relocInfo::none);
1460 jmp(E);
1461
1462 bind(C);
1463 pass_arg1(this, arg_1);
1464 call_VM_helper(oop_result, entry_point, 1, check_exceptions);
1465 ret(0);
1466
1467 bind(E);
1468 }
1469
1470 void MacroAssembler::call_VM(Register oop_result,
1471 address entry_point,
1472 Register arg_1,
1473 Register arg_2,
1474 bool check_exceptions) {
1475 Label C, E;
1476 call(C, relocInfo::none);
1477 jmp(E);
1478
1479 bind(C);
1480
1481 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg"));
1482
1483 pass_arg2(this, arg_2);
1484 pass_arg1(this, arg_1);
1485 call_VM_helper(oop_result, entry_point, 2, check_exceptions);
1486 ret(0);
1487
1488 bind(E);
1489 }
1490
1491 void MacroAssembler::call_VM(Register oop_result,
1492 address entry_point,
1493 Register arg_1,
1494 Register arg_2,
1495 Register arg_3,
1496 bool check_exceptions) {
1497 Label C, E;
1498 call(C, relocInfo::none);
1499 jmp(E);
1500
1501 bind(C);
1502
1503 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg"));
1504 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg"));
1505 pass_arg3(this, arg_3);
1506
1507 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg"));
1508 pass_arg2(this, arg_2);
1509
1510 pass_arg1(this, arg_1);
1511 call_VM_helper(oop_result, entry_point, 3, check_exceptions);
1512 ret(0);
1513
1514 bind(E);
1515 }
1516
1517 void MacroAssembler::call_VM(Register oop_result,
1518 Register last_java_sp,
1519 address entry_point,
1520 int number_of_arguments,
1521 bool check_exceptions) {
1522 Register thread = LP64_ONLY(r15_thread) NOT_LP64(noreg);
1523 call_VM_base(oop_result, thread, last_java_sp, entry_point, number_of_arguments, check_exceptions);
1524 }
1525
1526 void MacroAssembler::call_VM(Register oop_result,
1527 Register last_java_sp,
1528 address entry_point,
1529 Register arg_1,
1530 bool check_exceptions) {
1531 pass_arg1(this, arg_1);
1532 call_VM(oop_result, last_java_sp, entry_point, 1, check_exceptions);
1533 }
1534
1535 void MacroAssembler::call_VM(Register oop_result,
1536 Register last_java_sp,
1537 address entry_point,
1538 Register arg_1,
1539 Register arg_2,
1540 bool check_exceptions) {
1541
1542 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg"));
1543 pass_arg2(this, arg_2);
1544 pass_arg1(this, arg_1);
1545 call_VM(oop_result, last_java_sp, entry_point, 2, check_exceptions);
1546 }
1547
1548 void MacroAssembler::call_VM(Register oop_result,
1549 Register last_java_sp,
1550 address entry_point,
1551 Register arg_1,
1552 Register arg_2,
1553 Register arg_3,
1554 bool check_exceptions) {
1555 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg"));
1556 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg"));
1557 pass_arg3(this, arg_3);
1558 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg"));
1559 pass_arg2(this, arg_2);
1560 pass_arg1(this, arg_1);
1561 call_VM(oop_result, last_java_sp, entry_point, 3, check_exceptions);
1562 }
1563
1564 void MacroAssembler::super_call_VM(Register oop_result,
1565 Register last_java_sp,
1566 address entry_point,
1567 int number_of_arguments,
1568 bool check_exceptions) {
1569 Register thread = LP64_ONLY(r15_thread) NOT_LP64(noreg);
1570 MacroAssembler::call_VM_base(oop_result, thread, last_java_sp, entry_point, number_of_arguments, check_exceptions);
1571 }
1572
1573 void MacroAssembler::super_call_VM(Register oop_result,
1574 Register last_java_sp,
1575 address entry_point,
1576 Register arg_1,
1577 bool check_exceptions) {
1578 pass_arg1(this, arg_1);
1579 super_call_VM(oop_result, last_java_sp, entry_point, 1, check_exceptions);
1580 }
1581
1582 void MacroAssembler::super_call_VM(Register oop_result,
1583 Register last_java_sp,
1584 address entry_point,
1585 Register arg_1,
1586 Register arg_2,
1587 bool check_exceptions) {
1588
1589 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg"));
1590 pass_arg2(this, arg_2);
1591 pass_arg1(this, arg_1);
1592 super_call_VM(oop_result, last_java_sp, entry_point, 2, check_exceptions);
1593 }
1594
1595 void MacroAssembler::super_call_VM(Register oop_result,
1596 Register last_java_sp,
1597 address entry_point,
1598 Register arg_1,
1599 Register arg_2,
1600 Register arg_3,
1601 bool check_exceptions) {
1602 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg"));
1603 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg"));
1604 pass_arg3(this, arg_3);
1605 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg"));
1606 pass_arg2(this, arg_2);
1607 pass_arg1(this, arg_1);
1608 super_call_VM(oop_result, last_java_sp, entry_point, 3, check_exceptions);
1609 }
1610
1611 void MacroAssembler::call_VM_base(Register oop_result,
1612 Register java_thread,
1613 Register last_java_sp,
1614 address entry_point,
1615 int number_of_arguments,
1616 bool check_exceptions) {
1617 // determine java_thread register
1618 if (!java_thread->is_valid()) {
1619 #ifdef _LP64
1620 java_thread = r15_thread;
1621 #else
1622 java_thread = rdi;
1623 get_thread(java_thread);
1624 #endif // LP64
1625 }
1626 // determine last_java_sp register
1627 if (!last_java_sp->is_valid()) {
1628 last_java_sp = rsp;
1629 }
1630 // debugging support
1631 assert(number_of_arguments >= 0 , "cannot have negative number of arguments");
1632 LP64_ONLY(assert(java_thread == r15_thread, "unexpected register"));
1633 #ifdef ASSERT
1634 // TraceBytecodes does not use r12 but saves it over the call, so don't verify
1635 // r12 is the heapbase.
1636 LP64_ONLY(if ((UseCompressedOops || UseCompressedKlassPointers) && !TraceBytecodes) verify_heapbase("call_VM_base: heap base corrupted?");)
1637 #endif // ASSERT
1638
1639 assert(java_thread != oop_result , "cannot use the same register for java_thread & oop_result");
1640 assert(java_thread != last_java_sp, "cannot use the same register for java_thread & last_java_sp");
1641
1642 // push java thread (becomes first argument of C function)
1643
1644 NOT_LP64(push(java_thread); number_of_arguments++);
1645 LP64_ONLY(mov(c_rarg0, r15_thread));
1646
1647 // set last Java frame before call
1648 assert(last_java_sp != rbp, "can't use ebp/rbp");
1649
1650 // Only interpreter should have to set fp
1651 set_last_Java_frame(java_thread, last_java_sp, rbp, NULL);
1652
1653 // do the call, remove parameters
1654 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
1655
1656 // restore the thread (cannot use the pushed argument since arguments
1657 // may be overwritten by C code generated by an optimizing compiler);
1658 // however can use the register value directly if it is callee saved.
1659 if (LP64_ONLY(true ||) java_thread == rdi || java_thread == rsi) {
1660 // rdi & rsi (also r15) are callee saved -> nothing to do
1661 #ifdef ASSERT
1662 guarantee(java_thread != rax, "change this code");
1663 push(rax);
1664 { Label L;
1665 get_thread(rax);
1666 cmpptr(java_thread, rax);
1667 jcc(Assembler::equal, L);
1668 STOP("MacroAssembler::call_VM_base: rdi not callee saved?");
1669 bind(L);
1670 }
1671 pop(rax);
1672 #endif
1673 } else {
1674 get_thread(java_thread);
1675 }
1676 // reset last Java frame
1677 // Only interpreter should have to clear fp
1678 reset_last_Java_frame(java_thread, true, false);
1679
1680 #ifndef CC_INTERP
1681 // C++ interp handles this in the interpreter
1682 check_and_handle_popframe(java_thread);
1683 check_and_handle_earlyret(java_thread);
1684 #endif /* CC_INTERP */
1685
1686 if (check_exceptions) {
1687 // check for pending exceptions (java_thread is set upon return)
1688 cmpptr(Address(java_thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
1689 #ifndef _LP64
1690 jump_cc(Assembler::notEqual,
1691 RuntimeAddress(StubRoutines::forward_exception_entry()));
1692 #else
1693 // This used to conditionally jump to forward_exception however it is
1694 // possible if we relocate that the branch will not reach. So we must jump
1695 // around so we can always reach
1696
1697 Label ok;
1698 jcc(Assembler::equal, ok);
1699 jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
1700 bind(ok);
1701 #endif // LP64
1702 }
1703
1704 // get oop result if there is one and reset the value in the thread
1705 if (oop_result->is_valid()) {
1706 get_vm_result(oop_result, java_thread);
1707 }
1708 }
1709
1710 void MacroAssembler::call_VM_helper(Register oop_result, address entry_point, int number_of_arguments, bool check_exceptions) {
1711
1712 // Calculate the value for last_Java_sp
1713 // somewhat subtle. call_VM does an intermediate call
1714 // which places a return address on the stack just under the
1715 // stack pointer as the user finsihed with it. This allows
1716 // use to retrieve last_Java_pc from last_Java_sp[-1].
1717 // On 32bit we then have to push additional args on the stack to accomplish
1718 // the actual requested call. On 64bit call_VM only can use register args
1719 // so the only extra space is the return address that call_VM created.
1720 // This hopefully explains the calculations here.
1721
1722 #ifdef _LP64
1723 // We've pushed one address, correct last_Java_sp
1724 lea(rax, Address(rsp, wordSize));
1725 #else
1726 lea(rax, Address(rsp, (1 + number_of_arguments) * wordSize));
1727 #endif // LP64
1728
1729 call_VM_base(oop_result, noreg, rax, entry_point, number_of_arguments, check_exceptions);
1730
1731 }
1732
1733 void MacroAssembler::call_VM_leaf(address entry_point, int number_of_arguments) {
1734 call_VM_leaf_base(entry_point, number_of_arguments);
1735 }
1736
1737 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0) {
1738 pass_arg0(this, arg_0);
1739 call_VM_leaf(entry_point, 1);
1740 }
1741
1742 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0, Register arg_1) {
1743
1744 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg"));
1745 pass_arg1(this, arg_1);
1746 pass_arg0(this, arg_0);
1747 call_VM_leaf(entry_point, 2);
1748 }
1749
1750 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2) {
1751 LP64_ONLY(assert(arg_0 != c_rarg2, "smashed arg"));
1752 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg"));
1753 pass_arg2(this, arg_2);
1754 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg"));
1755 pass_arg1(this, arg_1);
1756 pass_arg0(this, arg_0);
1757 call_VM_leaf(entry_point, 3);
1758 }
1759
1760 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0) {
1761 pass_arg0(this, arg_0);
1762 MacroAssembler::call_VM_leaf_base(entry_point, 1);
1763 }
1764
1765 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1) {
1766
1767 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg"));
1768 pass_arg1(this, arg_1);
1769 pass_arg0(this, arg_0);
1770 MacroAssembler::call_VM_leaf_base(entry_point, 2);
1771 }
1772
1773 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2) {
1774 LP64_ONLY(assert(arg_0 != c_rarg2, "smashed arg"));
1775 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg"));
1776 pass_arg2(this, arg_2);
1777 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg"));
1778 pass_arg1(this, arg_1);
1779 pass_arg0(this, arg_0);
1780 MacroAssembler::call_VM_leaf_base(entry_point, 3);
1781 }
1782
1783 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2, Register arg_3) {
1784 LP64_ONLY(assert(arg_0 != c_rarg3, "smashed arg"));
1785 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg"));
1786 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg"));
1787 pass_arg3(this, arg_3);
1788 LP64_ONLY(assert(arg_0 != c_rarg2, "smashed arg"));
1789 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg"));
1790 pass_arg2(this, arg_2);
1791 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg"));
1792 pass_arg1(this, arg_1);
1793 pass_arg0(this, arg_0);
1794 MacroAssembler::call_VM_leaf_base(entry_point, 4);
1795 }
1796
1797 void MacroAssembler::get_vm_result(Register oop_result, Register java_thread) {
1798 movptr(oop_result, Address(java_thread, JavaThread::vm_result_offset()));
1799 movptr(Address(java_thread, JavaThread::vm_result_offset()), NULL_WORD);
1800 verify_oop(oop_result, "broken oop in call_VM_base");
1801 }
1802
1803 void MacroAssembler::get_vm_result_2(Register metadata_result, Register java_thread) {
1804 movptr(metadata_result, Address(java_thread, JavaThread::vm_result_2_offset()));
1805 movptr(Address(java_thread, JavaThread::vm_result_2_offset()), NULL_WORD);
1806 }
1807
1808 void MacroAssembler::check_and_handle_earlyret(Register java_thread) {
1809 }
1810
1811 void MacroAssembler::check_and_handle_popframe(Register java_thread) {
1812 }
1813
1814 void MacroAssembler::cmp32(AddressLiteral src1, int32_t imm) {
1815 if (reachable(src1)) {
1816 cmpl(as_Address(src1), imm);
1817 } else {
1818 lea(rscratch1, src1);
1819 cmpl(Address(rscratch1, 0), imm);
1820 }
1821 }
1822
1823 void MacroAssembler::cmp32(Register src1, AddressLiteral src2) {
1824 assert(!src2.is_lval(), "use cmpptr");
1825 if (reachable(src2)) {
1826 cmpl(src1, as_Address(src2));
1827 } else {
1828 lea(rscratch1, src2);
1829 cmpl(src1, Address(rscratch1, 0));
1830 }
1831 }
1832
1833 void MacroAssembler::cmp32(Register src1, int32_t imm) {
1834 Assembler::cmpl(src1, imm);
1835 }
1836
1837 void MacroAssembler::cmp32(Register src1, Address src2) {
1838 Assembler::cmpl(src1, src2);
1839 }
1840
1841 void MacroAssembler::cmpsd2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less) {
1842 ucomisd(opr1, opr2);
1843
1844 Label L;
1845 if (unordered_is_less) {
1846 movl(dst, -1);
1847 jcc(Assembler::parity, L);
1848 jcc(Assembler::below , L);
1849 movl(dst, 0);
1850 jcc(Assembler::equal , L);
1851 increment(dst);
1852 } else { // unordered is greater
1853 movl(dst, 1);
1854 jcc(Assembler::parity, L);
1855 jcc(Assembler::above , L);
1856 movl(dst, 0);
1857 jcc(Assembler::equal , L);
1858 decrementl(dst);
1859 }
1860 bind(L);
1861 }
1862
1863 void MacroAssembler::cmpss2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less) {
1864 ucomiss(opr1, opr2);
1865
1866 Label L;
1867 if (unordered_is_less) {
1868 movl(dst, -1);
1869 jcc(Assembler::parity, L);
1870 jcc(Assembler::below , L);
1871 movl(dst, 0);
1872 jcc(Assembler::equal , L);
1873 increment(dst);
1874 } else { // unordered is greater
1875 movl(dst, 1);
1876 jcc(Assembler::parity, L);
1877 jcc(Assembler::above , L);
1878 movl(dst, 0);
1879 jcc(Assembler::equal , L);
1880 decrementl(dst);
1881 }
1882 bind(L);
1883 }
1884
1885
1886 void MacroAssembler::cmp8(AddressLiteral src1, int imm) {
1887 if (reachable(src1)) {
1888 cmpb(as_Address(src1), imm);
1889 } else {
1890 lea(rscratch1, src1);
1891 cmpb(Address(rscratch1, 0), imm);
1892 }
1893 }
1894
1895 void MacroAssembler::cmpptr(Register src1, AddressLiteral src2) {
1896 #ifdef _LP64
1897 if (src2.is_lval()) {
1898 movptr(rscratch1, src2);
1899 Assembler::cmpq(src1, rscratch1);
1900 } else if (reachable(src2)) {
1901 cmpq(src1, as_Address(src2));
1902 } else {
1903 lea(rscratch1, src2);
1904 Assembler::cmpq(src1, Address(rscratch1, 0));
1905 }
1906 #else
1907 if (src2.is_lval()) {
1908 cmp_literal32(src1, (int32_t) src2.target(), src2.rspec());
1909 } else {
1910 cmpl(src1, as_Address(src2));
1911 }
1912 #endif // _LP64
1913 }
1914
1915 void MacroAssembler::cmpptr(Address src1, AddressLiteral src2) {
1916 assert(src2.is_lval(), "not a mem-mem compare");
1917 #ifdef _LP64
1918 // moves src2's literal address
1919 movptr(rscratch1, src2);
1920 Assembler::cmpq(src1, rscratch1);
1921 #else
1922 cmp_literal32(src1, (int32_t) src2.target(), src2.rspec());
1923 #endif // _LP64
1924 }
1925
1926 void MacroAssembler::locked_cmpxchgptr(Register reg, AddressLiteral adr) {
1927 if (reachable(adr)) {
1928 if (os::is_MP())
1929 lock();
1930 cmpxchgptr(reg, as_Address(adr));
1931 } else {
1932 lea(rscratch1, adr);
1933 if (os::is_MP())
1934 lock();
1935 cmpxchgptr(reg, Address(rscratch1, 0));
1936 }
1937 }
1938
1939 void MacroAssembler::cmpxchgptr(Register reg, Address adr) {
1940 LP64_ONLY(cmpxchgq(reg, adr)) NOT_LP64(cmpxchgl(reg, adr));
1941 }
1942
1943 void MacroAssembler::comisd(XMMRegister dst, AddressLiteral src) {
1944 if (reachable(src)) {
1945 Assembler::comisd(dst, as_Address(src));
1946 } else {
1947 lea(rscratch1, src);
1948 Assembler::comisd(dst, Address(rscratch1, 0));
1949 }
1950 }
1951
1952 void MacroAssembler::comiss(XMMRegister dst, AddressLiteral src) {
1953 if (reachable(src)) {
1954 Assembler::comiss(dst, as_Address(src));
1955 } else {
1956 lea(rscratch1, src);
1957 Assembler::comiss(dst, Address(rscratch1, 0));
1958 }
1959 }
1960
1961
1962 void MacroAssembler::cond_inc32(Condition cond, AddressLiteral counter_addr) {
1963 Condition negated_cond = negate_condition(cond);
1964 Label L;
1965 jcc(negated_cond, L);
1966 atomic_incl(counter_addr);
1967 bind(L);
1968 }
1969
1970 int MacroAssembler::corrected_idivl(Register reg) {
1971 // Full implementation of Java idiv and irem; checks for
1972 // special case as described in JVM spec., p.243 & p.271.
1973 // The function returns the (pc) offset of the idivl
1974 // instruction - may be needed for implicit exceptions.
1975 //
1976 // normal case special case
1977 //
1978 // input : rax,: dividend min_int
1979 // reg: divisor (may not be rax,/rdx) -1
1980 //
1981 // output: rax,: quotient (= rax, idiv reg) min_int
1982 // rdx: remainder (= rax, irem reg) 0
1983 assert(reg != rax && reg != rdx, "reg cannot be rax, or rdx register");
1984 const int min_int = 0x80000000;
1985 Label normal_case, special_case;
1986
1987 // check for special case
1988 cmpl(rax, min_int);
1989 jcc(Assembler::notEqual, normal_case);
1990 xorl(rdx, rdx); // prepare rdx for possible special case (where remainder = 0)
1991 cmpl(reg, -1);
1992 jcc(Assembler::equal, special_case);
1993
1994 // handle normal case
1995 bind(normal_case);
1996 cdql();
1997 int idivl_offset = offset();
1998 idivl(reg);
1999
2000 // normal and special case exit
2001 bind(special_case);
2002
2003 return idivl_offset;
2004 }
2005
2006
2007
2008 void MacroAssembler::decrementl(Register reg, int value) {
2009 if (value == min_jint) {subl(reg, value) ; return; }
2010 if (value < 0) { incrementl(reg, -value); return; }
2011 if (value == 0) { ; return; }
2012 if (value == 1 && UseIncDec) { decl(reg) ; return; }
2013 /* else */ { subl(reg, value) ; return; }
2014 }
2015
2016 void MacroAssembler::decrementl(Address dst, int value) {
2017 if (value == min_jint) {subl(dst, value) ; return; }
2018 if (value < 0) { incrementl(dst, -value); return; }
2019 if (value == 0) { ; return; }
2020 if (value == 1 && UseIncDec) { decl(dst) ; return; }
2021 /* else */ { subl(dst, value) ; return; }
2022 }
2023
2024 void MacroAssembler::division_with_shift (Register reg, int shift_value) {
2025 assert (shift_value > 0, "illegal shift value");
2026 Label _is_positive;
2027 testl (reg, reg);
2028 jcc (Assembler::positive, _is_positive);
2029 int offset = (1 << shift_value) - 1 ;
2030
2031 if (offset == 1) {
2032 incrementl(reg);
2033 } else {
2034 addl(reg, offset);
2035 }
2036
2037 bind (_is_positive);
2038 sarl(reg, shift_value);
2039 }
2040
2041 void MacroAssembler::divsd(XMMRegister dst, AddressLiteral src) {
2042 if (reachable(src)) {
2043 Assembler::divsd(dst, as_Address(src));
2044 } else {
2045 lea(rscratch1, src);
2046 Assembler::divsd(dst, Address(rscratch1, 0));
2047 }
2048 }
2049
2050 void MacroAssembler::divss(XMMRegister dst, AddressLiteral src) {
2051 if (reachable(src)) {
2052 Assembler::divss(dst, as_Address(src));
2053 } else {
2054 lea(rscratch1, src);
2055 Assembler::divss(dst, Address(rscratch1, 0));
2056 }
2057 }
2058
2059 // !defined(COMPILER2) is because of stupid core builds
2060 #if !defined(_LP64) || defined(COMPILER1) || !defined(COMPILER2)
2061 void MacroAssembler::empty_FPU_stack() {
2062 if (VM_Version::supports_mmx()) {
2063 emms();
2064 } else {
2065 for (int i = 8; i-- > 0; ) ffree(i);
2066 }
2067 }
2068 #endif // !LP64 || C1 || !C2
2069
2070
2071 // Defines obj, preserves var_size_in_bytes
2072 void MacroAssembler::eden_allocate(Register obj,
2073 Register var_size_in_bytes,
2074 int con_size_in_bytes,
2075 Register t1,
2076 Label& slow_case) {
2077 assert(obj == rax, "obj must be in rax, for cmpxchg");
2078 assert_different_registers(obj, var_size_in_bytes, t1);
2079 if (CMSIncrementalMode || !Universe::heap()->supports_inline_contig_alloc()) {
2080 jmp(slow_case);
2081 } else {
2082 Register end = t1;
2083 Label retry;
2084 bind(retry);
2085 ExternalAddress heap_top((address) Universe::heap()->top_addr());
2086 movptr(obj, heap_top);
2087 if (var_size_in_bytes == noreg) {
2088 lea(end, Address(obj, con_size_in_bytes));
2089 } else {
2090 lea(end, Address(obj, var_size_in_bytes, Address::times_1));
2091 }
2092 // if end < obj then we wrapped around => object too long => slow case
2093 cmpptr(end, obj);
2094 jcc(Assembler::below, slow_case);
2095 cmpptr(end, ExternalAddress((address) Universe::heap()->end_addr()));
2096 jcc(Assembler::above, slow_case);
2097 // Compare obj with the top addr, and if still equal, store the new top addr in
2098 // end at the address of the top addr pointer. Sets ZF if was equal, and clears
2099 // it otherwise. Use lock prefix for atomicity on MPs.
2100 locked_cmpxchgptr(end, heap_top);
2101 jcc(Assembler::notEqual, retry);
2102 }
2103 }
2104
2105 void MacroAssembler::enter() {
2106 push(rbp);
2107 mov(rbp, rsp);
2108 }
2109
2110 // A 5 byte nop that is safe for patching (see patch_verified_entry)
2111 void MacroAssembler::fat_nop() {
2112 if (UseAddressNop) {
2113 addr_nop_5();
2114 } else {
2115 emit_byte(0x26); // es:
2116 emit_byte(0x2e); // cs:
2117 emit_byte(0x64); // fs:
2118 emit_byte(0x65); // gs:
2119 emit_byte(0x90);
2120 }
2121 }
2122
2123 void MacroAssembler::fcmp(Register tmp) {
2124 fcmp(tmp, 1, true, true);
2125 }
2126
2127 void MacroAssembler::fcmp(Register tmp, int index, bool pop_left, bool pop_right) {
2128 assert(!pop_right || pop_left, "usage error");
2129 if (VM_Version::supports_cmov()) {
2130 assert(tmp == noreg, "unneeded temp");
2131 if (pop_left) {
2132 fucomip(index);
2133 } else {
2134 fucomi(index);
2135 }
2136 if (pop_right) {
2137 fpop();
2138 }
2139 } else {
2140 assert(tmp != noreg, "need temp");
2141 if (pop_left) {
2142 if (pop_right) {
2143 fcompp();
2144 } else {
2145 fcomp(index);
2146 }
2147 } else {
2148 fcom(index);
2149 }
2150 // convert FPU condition into eflags condition via rax,
2151 save_rax(tmp);
2152 fwait(); fnstsw_ax();
2153 sahf();
2154 restore_rax(tmp);
2155 }
2156 // condition codes set as follows:
2157 //
2158 // CF (corresponds to C0) if x < y
2159 // PF (corresponds to C2) if unordered
2160 // ZF (corresponds to C3) if x = y
2161 }
2162
2163 void MacroAssembler::fcmp2int(Register dst, bool unordered_is_less) {
2164 fcmp2int(dst, unordered_is_less, 1, true, true);
2165 }
2166
2167 void MacroAssembler::fcmp2int(Register dst, bool unordered_is_less, int index, bool pop_left, bool pop_right) {
2168 fcmp(VM_Version::supports_cmov() ? noreg : dst, index, pop_left, pop_right);
2169 Label L;
2170 if (unordered_is_less) {
2171 movl(dst, -1);
2172 jcc(Assembler::parity, L);
2173 jcc(Assembler::below , L);
2174 movl(dst, 0);
2175 jcc(Assembler::equal , L);
2176 increment(dst);
2177 } else { // unordered is greater
2178 movl(dst, 1);
2179 jcc(Assembler::parity, L);
2180 jcc(Assembler::above , L);
2181 movl(dst, 0);
2182 jcc(Assembler::equal , L);
2183 decrementl(dst);
2184 }
2185 bind(L);
2186 }
2187
2188 void MacroAssembler::fld_d(AddressLiteral src) {
2189 fld_d(as_Address(src));
2190 }
2191
2192 void MacroAssembler::fld_s(AddressLiteral src) {
2193 fld_s(as_Address(src));
2194 }
2195
2196 void MacroAssembler::fld_x(AddressLiteral src) {
2197 Assembler::fld_x(as_Address(src));
2198 }
2199
2200 void MacroAssembler::fldcw(AddressLiteral src) {
2201 Assembler::fldcw(as_Address(src));
2202 }
2203
2204 void MacroAssembler::pow_exp_core_encoding() {
2205 // kills rax, rcx, rdx
2206 subptr(rsp,sizeof(jdouble));
2207 // computes 2^X. Stack: X ...
2208 // f2xm1 computes 2^X-1 but only operates on -1<=X<=1. Get int(X) and
2209 // keep it on the thread's stack to compute 2^int(X) later
2210 // then compute 2^(X-int(X)) as (2^(X-int(X)-1+1)
2211 // final result is obtained with: 2^X = 2^int(X) * 2^(X-int(X))
2212 fld_s(0); // Stack: X X ...
2213 frndint(); // Stack: int(X) X ...
2214 fsuba(1); // Stack: int(X) X-int(X) ...
2215 fistp_s(Address(rsp,0)); // move int(X) as integer to thread's stack. Stack: X-int(X) ...
2216 f2xm1(); // Stack: 2^(X-int(X))-1 ...
2217 fld1(); // Stack: 1 2^(X-int(X))-1 ...
2218 faddp(1); // Stack: 2^(X-int(X))
2219 // computes 2^(int(X)): add exponent bias (1023) to int(X), then
2220 // shift int(X)+1023 to exponent position.
2221 // Exponent is limited to 11 bits if int(X)+1023 does not fit in 11
2222 // bits, set result to NaN. 0x000 and 0x7FF are reserved exponent
2223 // values so detect them and set result to NaN.
2224 movl(rax,Address(rsp,0));
2225 movl(rcx, -2048); // 11 bit mask and valid NaN binary encoding
2226 addl(rax, 1023);
2227 movl(rdx,rax);
2228 shll(rax,20);
2229 // Check that 0 < int(X)+1023 < 2047. Otherwise set rax to NaN.
2230 addl(rdx,1);
2231 // Check that 1 < int(X)+1023+1 < 2048
2232 // in 3 steps:
2233 // 1- (int(X)+1023+1)&-2048 == 0 => 0 <= int(X)+1023+1 < 2048
2234 // 2- (int(X)+1023+1)&-2048 != 0
2235 // 3- (int(X)+1023+1)&-2048 != 1
2236 // Do 2- first because addl just updated the flags.
2237 cmov32(Assembler::equal,rax,rcx);
2238 cmpl(rdx,1);
2239 cmov32(Assembler::equal,rax,rcx);
2240 testl(rdx,rcx);
2241 cmov32(Assembler::notEqual,rax,rcx);
2242 movl(Address(rsp,4),rax);
2243 movl(Address(rsp,0),0);
2244 fmul_d(Address(rsp,0)); // Stack: 2^X ...
2245 addptr(rsp,sizeof(jdouble));
2246 }
2247
2248 void MacroAssembler::increase_precision() {
2249 subptr(rsp, BytesPerWord);
2250 fnstcw(Address(rsp, 0));
2251 movl(rax, Address(rsp, 0));
2252 orl(rax, 0x300);
2253 push(rax);
2254 fldcw(Address(rsp, 0));
2255 pop(rax);
2256 }
2257
2258 void MacroAssembler::restore_precision() {
2259 fldcw(Address(rsp, 0));
2260 addptr(rsp, BytesPerWord);
2261 }
2262
2263 void MacroAssembler::fast_pow() {
2264 // computes X^Y = 2^(Y * log2(X))
2265 // if fast computation is not possible, result is NaN. Requires
2266 // fallback from user of this macro.
2267 // increase precision for intermediate steps of the computation
2268 increase_precision();
2269 fyl2x(); // Stack: (Y*log2(X)) ...
2270 pow_exp_core_encoding(); // Stack: exp(X) ...
2271 restore_precision();
2272 }
2273
2274 void MacroAssembler::fast_exp() {
2275 // computes exp(X) = 2^(X * log2(e))
2276 // if fast computation is not possible, result is NaN. Requires
2277 // fallback from user of this macro.
2278 // increase precision for intermediate steps of the computation
2279 increase_precision();
2280 fldl2e(); // Stack: log2(e) X ...
2281 fmulp(1); // Stack: (X*log2(e)) ...
2282 pow_exp_core_encoding(); // Stack: exp(X) ...
2283 restore_precision();
2284 }
2285
2286 void MacroAssembler::pow_or_exp(bool is_exp, int num_fpu_regs_in_use) {
2287 // kills rax, rcx, rdx
2288 // pow and exp needs 2 extra registers on the fpu stack.
2289 Label slow_case, done;
2290 Register tmp = noreg;
2291 if (!VM_Version::supports_cmov()) {
2292 // fcmp needs a temporary so preserve rdx,
2293 tmp = rdx;
2294 }
2295 Register tmp2 = rax;
2296 Register tmp3 = rcx;
2297
2298 if (is_exp) {
2299 // Stack: X
2300 fld_s(0); // duplicate argument for runtime call. Stack: X X
2301 fast_exp(); // Stack: exp(X) X
2302 fcmp(tmp, 0, false, false); // Stack: exp(X) X
2303 // exp(X) not equal to itself: exp(X) is NaN go to slow case.
2304 jcc(Assembler::parity, slow_case);
2305 // get rid of duplicate argument. Stack: exp(X)
2306 if (num_fpu_regs_in_use > 0) {
2307 fxch();
2308 fpop();
2309 } else {
2310 ffree(1);
2311 }
2312 jmp(done);
2313 } else {
2314 // Stack: X Y
2315 Label x_negative, y_odd;
2316
2317 fldz(); // Stack: 0 X Y
2318 fcmp(tmp, 1, true, false); // Stack: X Y
2319 jcc(Assembler::above, x_negative);
2320
2321 // X >= 0
2322
2323 fld_s(1); // duplicate arguments for runtime call. Stack: Y X Y
2324 fld_s(1); // Stack: X Y X Y
2325 fast_pow(); // Stack: X^Y X Y
2326 fcmp(tmp, 0, false, false); // Stack: X^Y X Y
2327 // X^Y not equal to itself: X^Y is NaN go to slow case.
2328 jcc(Assembler::parity, slow_case);
2329 // get rid of duplicate arguments. Stack: X^Y
2330 if (num_fpu_regs_in_use > 0) {
2331 fxch(); fpop();
2332 fxch(); fpop();
2333 } else {
2334 ffree(2);
2335 ffree(1);
2336 }
2337 jmp(done);
2338
2339 // X <= 0
2340 bind(x_negative);
2341
2342 fld_s(1); // Stack: Y X Y
2343 frndint(); // Stack: int(Y) X Y
2344 fcmp(tmp, 2, false, false); // Stack: int(Y) X Y
2345 jcc(Assembler::notEqual, slow_case);
2346
2347 subptr(rsp, 8);
2348
2349 // For X^Y, when X < 0, Y has to be an integer and the final
2350 // result depends on whether it's odd or even. We just checked
2351 // that int(Y) == Y. We move int(Y) to gp registers as a 64 bit
2352 // integer to test its parity. If int(Y) is huge and doesn't fit
2353 // in the 64 bit integer range, the integer indefinite value will
2354 // end up in the gp registers. Huge numbers are all even, the
2355 // integer indefinite number is even so it's fine.
2356
2357 #ifdef ASSERT
2358 // Let's check we don't end up with an integer indefinite number
2359 // when not expected. First test for huge numbers: check whether
2360 // int(Y)+1 == int(Y) which is true for very large numbers and
2361 // those are all even. A 64 bit integer is guaranteed to not
2362 // overflow for numbers where y+1 != y (when precision is set to
2363 // double precision).
2364 Label y_not_huge;
2365
2366 fld1(); // Stack: 1 int(Y) X Y
2367 fadd(1); // Stack: 1+int(Y) int(Y) X Y
2368
2369 #ifdef _LP64
2370 // trip to memory to force the precision down from double extended
2371 // precision
2372 fstp_d(Address(rsp, 0));
2373 fld_d(Address(rsp, 0));
2374 #endif
2375
2376 fcmp(tmp, 1, true, false); // Stack: int(Y) X Y
2377 #endif
2378
2379 // move int(Y) as 64 bit integer to thread's stack
2380 fistp_d(Address(rsp,0)); // Stack: X Y
2381
2382 #ifdef ASSERT
2383 jcc(Assembler::notEqual, y_not_huge);
2384
2385 // Y is huge so we know it's even. It may not fit in a 64 bit
2386 // integer and we don't want the debug code below to see the
2387 // integer indefinite value so overwrite int(Y) on the thread's
2388 // stack with 0.
2389 movl(Address(rsp, 0), 0);
2390 movl(Address(rsp, 4), 0);
2391
2392 bind(y_not_huge);
2393 #endif
2394
2395 fld_s(1); // duplicate arguments for runtime call. Stack: Y X Y
2396 fld_s(1); // Stack: X Y X Y
2397 fabs(); // Stack: abs(X) Y X Y
2398 fast_pow(); // Stack: abs(X)^Y X Y
2399 fcmp(tmp, 0, false, false); // Stack: abs(X)^Y X Y
2400 // abs(X)^Y not equal to itself: abs(X)^Y is NaN go to slow case.
2401
2402 pop(tmp2);
2403 NOT_LP64(pop(tmp3));
2404 jcc(Assembler::parity, slow_case);
2405
2406 #ifdef ASSERT
2407 // Check that int(Y) is not integer indefinite value (int
2408 // overflow). Shouldn't happen because for values that would
2409 // overflow, 1+int(Y)==Y which was tested earlier.
2410 #ifndef _LP64
2411 {
2412 Label integer;
2413 testl(tmp2, tmp2);
2414 jcc(Assembler::notZero, integer);
2415 cmpl(tmp3, 0x80000000);
2416 jcc(Assembler::notZero, integer);
2417 STOP("integer indefinite value shouldn't be seen here");
2418 bind(integer);
2419 }
2420 #else
2421 {
2422 Label integer;
2423 mov(tmp3, tmp2); // preserve tmp2 for parity check below
2424 shlq(tmp3, 1);
2425 jcc(Assembler::carryClear, integer);
2426 jcc(Assembler::notZero, integer);
2427 STOP("integer indefinite value shouldn't be seen here");
2428 bind(integer);
2429 }
2430 #endif
2431 #endif
2432
2433 // get rid of duplicate arguments. Stack: X^Y
2434 if (num_fpu_regs_in_use > 0) {
2435 fxch(); fpop();
2436 fxch(); fpop();
2437 } else {
2438 ffree(2);
2439 ffree(1);
2440 }
2441
2442 testl(tmp2, 1);
2443 jcc(Assembler::zero, done); // X <= 0, Y even: X^Y = abs(X)^Y
2444 // X <= 0, Y even: X^Y = -abs(X)^Y
2445
2446 fchs(); // Stack: -abs(X)^Y Y
2447 jmp(done);
2448 }
2449
2450 // slow case: runtime call
2451 bind(slow_case);
2452
2453 fpop(); // pop incorrect result or int(Y)
2454
2455 fp_runtime_fallback(is_exp ? CAST_FROM_FN_PTR(address, SharedRuntime::dexp) : CAST_FROM_FN_PTR(address, SharedRuntime::dpow),
2456 is_exp ? 1 : 2, num_fpu_regs_in_use);
2457
2458 // Come here with result in F-TOS
2459 bind(done);
2460 }
2461
2462 void MacroAssembler::fpop() {
2463 ffree();
2464 fincstp();
2465 }
2466
2467 void MacroAssembler::fremr(Register tmp) {
2468 save_rax(tmp);
2469 { Label L;
2470 bind(L);
2471 fprem();
2472 fwait(); fnstsw_ax();
2473 #ifdef _LP64
2474 testl(rax, 0x400);
2475 jcc(Assembler::notEqual, L);
2476 #else
2477 sahf();
2478 jcc(Assembler::parity, L);
2479 #endif // _LP64
2480 }
2481 restore_rax(tmp);
2482 // Result is in ST0.
2483 // Note: fxch & fpop to get rid of ST1
2484 // (otherwise FPU stack could overflow eventually)
2485 fxch(1);
2486 fpop();
2487 }
2488
2489
2490 void MacroAssembler::incrementl(AddressLiteral dst) {
2491 if (reachable(dst)) {
2492 incrementl(as_Address(dst));
2493 } else {
2494 lea(rscratch1, dst);
2495 incrementl(Address(rscratch1, 0));
2496 }
2497 }
2498
2499 void MacroAssembler::incrementl(ArrayAddress dst) {
2500 incrementl(as_Address(dst));
2501 }
2502
2503 void MacroAssembler::incrementl(Register reg, int value) {
2504 if (value == min_jint) {addl(reg, value) ; return; }
2505 if (value < 0) { decrementl(reg, -value); return; }
2506 if (value == 0) { ; return; }
2507 if (value == 1 && UseIncDec) { incl(reg) ; return; }
2508 /* else */ { addl(reg, value) ; return; }
2509 }
2510
2511 void MacroAssembler::incrementl(Address dst, int value) {
2512 if (value == min_jint) {addl(dst, value) ; return; }
2513 if (value < 0) { decrementl(dst, -value); return; }
2514 if (value == 0) { ; return; }
2515 if (value == 1 && UseIncDec) { incl(dst) ; return; }
2516 /* else */ { addl(dst, value) ; return; }
2517 }
2518
2519 void MacroAssembler::jump(AddressLiteral dst) {
2520 if (reachable(dst)) {
2521 jmp_literal(dst.target(), dst.rspec());
2522 } else {
2523 lea(rscratch1, dst);
2524 jmp(rscratch1);
2525 }
2526 }
2527
2528 void MacroAssembler::jump_cc(Condition cc, AddressLiteral dst) {
2529 if (reachable(dst)) {
2530 InstructionMark im(this);
2531 relocate(dst.reloc());
2532 const int short_size = 2;
2533 const int long_size = 6;
2534 int offs = (intptr_t)dst.target() - ((intptr_t)pc());
2535 if (dst.reloc() == relocInfo::none && is8bit(offs - short_size)) {
2536 // 0111 tttn #8-bit disp
2537 emit_byte(0x70 | cc);
2538 emit_byte((offs - short_size) & 0xFF);
2539 } else {
2540 // 0000 1111 1000 tttn #32-bit disp
2541 emit_byte(0x0F);
2542 emit_byte(0x80 | cc);
2543 emit_long(offs - long_size);
2544 }
2545 } else {
2546 #ifdef ASSERT
2547 warning("reversing conditional branch");
2548 #endif /* ASSERT */
2549 Label skip;
2550 jccb(reverse[cc], skip);
2551 lea(rscratch1, dst);
2552 Assembler::jmp(rscratch1);
2553 bind(skip);
2554 }
2555 }
2556
2557 void MacroAssembler::ldmxcsr(AddressLiteral src) {
2558 if (reachable(src)) {
2559 Assembler::ldmxcsr(as_Address(src));
2560 } else {
2561 lea(rscratch1, src);
2562 Assembler::ldmxcsr(Address(rscratch1, 0));
2563 }
2564 }
2565
2566 int MacroAssembler::load_signed_byte(Register dst, Address src) {
2567 int off;
2568 if (LP64_ONLY(true ||) VM_Version::is_P6()) {
2569 off = offset();
2570 movsbl(dst, src); // movsxb
2571 } else {
2572 off = load_unsigned_byte(dst, src);
2573 shll(dst, 24);
2574 sarl(dst, 24);
2575 }
2576 return off;
2577 }
2578
2579 // Note: load_signed_short used to be called load_signed_word.
2580 // Although the 'w' in x86 opcodes refers to the term "word" in the assembler
2581 // manual, which means 16 bits, that usage is found nowhere in HotSpot code.
2582 // The term "word" in HotSpot means a 32- or 64-bit machine word.
2583 int MacroAssembler::load_signed_short(Register dst, Address src) {
2584 int off;
2585 if (LP64_ONLY(true ||) VM_Version::is_P6()) {
2586 // This is dubious to me since it seems safe to do a signed 16 => 64 bit
2587 // version but this is what 64bit has always done. This seems to imply
2588 // that users are only using 32bits worth.
2589 off = offset();
2590 movswl(dst, src); // movsxw
2591 } else {
2592 off = load_unsigned_short(dst, src);
2593 shll(dst, 16);
2594 sarl(dst, 16);
2595 }
2596 return off;
2597 }
2598
2599 int MacroAssembler::load_unsigned_byte(Register dst, Address src) {
2600 // According to Intel Doc. AP-526, "Zero-Extension of Short", p.16,
2601 // and "3.9 Partial Register Penalties", p. 22).
2602 int off;
2603 if (LP64_ONLY(true || ) VM_Version::is_P6() || src.uses(dst)) {
2604 off = offset();
2605 movzbl(dst, src); // movzxb
2606 } else {
2607 xorl(dst, dst);
2608 off = offset();
2609 movb(dst, src);
2610 }
2611 return off;
2612 }
2613
2614 // Note: load_unsigned_short used to be called load_unsigned_word.
2615 int MacroAssembler::load_unsigned_short(Register dst, Address src) {
2616 // According to Intel Doc. AP-526, "Zero-Extension of Short", p.16,
2617 // and "3.9 Partial Register Penalties", p. 22).
2618 int off;
2619 if (LP64_ONLY(true ||) VM_Version::is_P6() || src.uses(dst)) {
2620 off = offset();
2621 movzwl(dst, src); // movzxw
2622 } else {
2623 xorl(dst, dst);
2624 off = offset();
2625 movw(dst, src);
2626 }
2627 return off;
2628 }
2629
2630 void MacroAssembler::load_sized_value(Register dst, Address src, size_t size_in_bytes, bool is_signed, Register dst2) {
2631 switch (size_in_bytes) {
2632 #ifndef _LP64
2633 case 8:
2634 assert(dst2 != noreg, "second dest register required");
2635 movl(dst, src);
2636 movl(dst2, src.plus_disp(BytesPerInt));
2637 break;
2638 #else
2639 case 8: movq(dst, src); break;
2640 #endif
2641 case 4: movl(dst, src); break;
2642 case 2: is_signed ? load_signed_short(dst, src) : load_unsigned_short(dst, src); break;
2643 case 1: is_signed ? load_signed_byte( dst, src) : load_unsigned_byte( dst, src); break;
2644 default: ShouldNotReachHere();
2645 }
2646 }
2647
2648 void MacroAssembler::store_sized_value(Address dst, Register src, size_t size_in_bytes, Register src2) {
2649 switch (size_in_bytes) {
2650 #ifndef _LP64
2651 case 8:
2652 assert(src2 != noreg, "second source register required");
2653 movl(dst, src);
2654 movl(dst.plus_disp(BytesPerInt), src2);
2655 break;
2656 #else
2657 case 8: movq(dst, src); break;
2658 #endif
2659 case 4: movl(dst, src); break;
2660 case 2: movw(dst, src); break;
2661 case 1: movb(dst, src); break;
2662 default: ShouldNotReachHere();
2663 }
2664 }
2665
2666 void MacroAssembler::mov32(AddressLiteral dst, Register src) {
2667 if (reachable(dst)) {
2668 movl(as_Address(dst), src);
2669 } else {
2670 lea(rscratch1, dst);
2671 movl(Address(rscratch1, 0), src);
2672 }
2673 }
2674
2675 void MacroAssembler::mov32(Register dst, AddressLiteral src) {
2676 if (reachable(src)) {
2677 movl(dst, as_Address(src));
2678 } else {
2679 lea(rscratch1, src);
2680 movl(dst, Address(rscratch1, 0));
2681 }
2682 }
2683
2684 // C++ bool manipulation
2685
2686 void MacroAssembler::movbool(Register dst, Address src) {
2687 if(sizeof(bool) == 1)
2688 movb(dst, src);
2689 else if(sizeof(bool) == 2)
2690 movw(dst, src);
2691 else if(sizeof(bool) == 4)
2692 movl(dst, src);
2693 else
2694 // unsupported
2695 ShouldNotReachHere();
2696 }
2697
2698 void MacroAssembler::movbool(Address dst, bool boolconst) {
2699 if(sizeof(bool) == 1)
2700 movb(dst, (int) boolconst);
2701 else if(sizeof(bool) == 2)
2702 movw(dst, (int) boolconst);
2703 else if(sizeof(bool) == 4)
2704 movl(dst, (int) boolconst);
2705 else
2706 // unsupported
2707 ShouldNotReachHere();
2708 }
2709
2710 void MacroAssembler::movbool(Address dst, Register src) {
2711 if(sizeof(bool) == 1)
2712 movb(dst, src);
2713 else if(sizeof(bool) == 2)
2714 movw(dst, src);
2715 else if(sizeof(bool) == 4)
2716 movl(dst, src);
2717 else
2718 // unsupported
2719 ShouldNotReachHere();
2720 }
2721
2722 void MacroAssembler::movbyte(ArrayAddress dst, int src) {
2723 movb(as_Address(dst), src);
2724 }
2725
2726 void MacroAssembler::movdl(XMMRegister dst, AddressLiteral src) {
2727 if (reachable(src)) {
2728 movdl(dst, as_Address(src));
2729 } else {
2730 lea(rscratch1, src);
2731 movdl(dst, Address(rscratch1, 0));
2732 }
2733 }
2734
2735 void MacroAssembler::movq(XMMRegister dst, AddressLiteral src) {
2736 if (reachable(src)) {
2737 movq(dst, as_Address(src));
2738 } else {
2739 lea(rscratch1, src);
2740 movq(dst, Address(rscratch1, 0));
2741 }
2742 }
2743
2744 void MacroAssembler::movdbl(XMMRegister dst, AddressLiteral src) {
2745 if (reachable(src)) {
2746 if (UseXmmLoadAndClearUpper) {
2747 movsd (dst, as_Address(src));
2748 } else {
2749 movlpd(dst, as_Address(src));
2750 }
2751 } else {
2752 lea(rscratch1, src);
2753 if (UseXmmLoadAndClearUpper) {
2754 movsd (dst, Address(rscratch1, 0));
2755 } else {
2756 movlpd(dst, Address(rscratch1, 0));
2757 }
2758 }
2759 }
2760
2761 void MacroAssembler::movflt(XMMRegister dst, AddressLiteral src) {
2762 if (reachable(src)) {
2763 movss(dst, as_Address(src));
2764 } else {
2765 lea(rscratch1, src);
2766 movss(dst, Address(rscratch1, 0));
2767 }
2768 }
2769
2770 void MacroAssembler::movptr(Register dst, Register src) {
2771 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src));
2772 }
2773
2774 void MacroAssembler::movptr(Register dst, Address src) {
2775 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src));
2776 }
2777
2778 // src should NEVER be a real pointer. Use AddressLiteral for true pointers
2779 void MacroAssembler::movptr(Register dst, intptr_t src) {
2780 LP64_ONLY(mov64(dst, src)) NOT_LP64(movl(dst, src));
2781 }
2782
2783 void MacroAssembler::movptr(Address dst, Register src) {
2784 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src));
2785 }
2786
2787 void MacroAssembler::movdqu(XMMRegister dst, AddressLiteral src) {
2788 if (reachable(src)) {
2789 Assembler::movdqu(dst, as_Address(src));
2790 } else {
2791 lea(rscratch1, src);
2792 Assembler::movdqu(dst, Address(rscratch1, 0));
2793 }
2794 }
2795
2796 void MacroAssembler::movsd(XMMRegister dst, AddressLiteral src) {
2797 if (reachable(src)) {
2798 Assembler::movsd(dst, as_Address(src));
2799 } else {
2800 lea(rscratch1, src);
2801 Assembler::movsd(dst, Address(rscratch1, 0));
2802 }
2803 }
2804
2805 void MacroAssembler::movss(XMMRegister dst, AddressLiteral src) {
2806 if (reachable(src)) {
2807 Assembler::movss(dst, as_Address(src));
2808 } else {
2809 lea(rscratch1, src);
2810 Assembler::movss(dst, Address(rscratch1, 0));
2811 }
2812 }
2813
2814 void MacroAssembler::mulsd(XMMRegister dst, AddressLiteral src) {
2815 if (reachable(src)) {
2816 Assembler::mulsd(dst, as_Address(src));
2817 } else {
2818 lea(rscratch1, src);
2819 Assembler::mulsd(dst, Address(rscratch1, 0));
2820 }
2821 }
2822
2823 void MacroAssembler::mulss(XMMRegister dst, AddressLiteral src) {
2824 if (reachable(src)) {
2825 Assembler::mulss(dst, as_Address(src));
2826 } else {
2827 lea(rscratch1, src);
2828 Assembler::mulss(dst, Address(rscratch1, 0));
2829 }
2830 }
2831
2832 void MacroAssembler::null_check(Register reg, int offset) {
2833 if (needs_explicit_null_check(offset)) {
2834 // provoke OS NULL exception if reg = NULL by
2835 // accessing M[reg] w/o changing any (non-CC) registers
2836 // NOTE: cmpl is plenty here to provoke a segv
2837 cmpptr(rax, Address(reg, 0));
2838 // Note: should probably use testl(rax, Address(reg, 0));
2839 // may be shorter code (however, this version of
2840 // testl needs to be implemented first)
2841 } else {
2842 // nothing to do, (later) access of M[reg + offset]
2843 // will provoke OS NULL exception if reg = NULL
2844 }
2845 }
2846
2847 void MacroAssembler::os_breakpoint() {
2848 // instead of directly emitting a breakpoint, call os:breakpoint for better debugability
2849 // (e.g., MSVC can't call ps() otherwise)
2850 call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint)));
2851 }
2852
2853 void MacroAssembler::pop_CPU_state() {
2854 pop_FPU_state();
2855 pop_IU_state();
2856 }
2857
2858 void MacroAssembler::pop_FPU_state() {
2859 NOT_LP64(frstor(Address(rsp, 0));)
2860 LP64_ONLY(fxrstor(Address(rsp, 0));)
2861 addptr(rsp, FPUStateSizeInWords * wordSize);
2862 }
2863
2864 void MacroAssembler::pop_IU_state() {
2865 popa();
2866 LP64_ONLY(addq(rsp, 8));
2867 popf();
2868 }
2869
2870 // Save Integer and Float state
2871 // Warning: Stack must be 16 byte aligned (64bit)
2872 void MacroAssembler::push_CPU_state() {
2873 push_IU_state();
2874 push_FPU_state();
2875 }
2876
2877 void MacroAssembler::push_FPU_state() {
2878 subptr(rsp, FPUStateSizeInWords * wordSize);
2879 #ifndef _LP64
2880 fnsave(Address(rsp, 0));
2881 fwait();
2882 #else
2883 fxsave(Address(rsp, 0));
2884 #endif // LP64
2885 }
2886
2887 void MacroAssembler::push_IU_state() {
2888 // Push flags first because pusha kills them
2889 pushf();
2890 // Make sure rsp stays 16-byte aligned
2891 LP64_ONLY(subq(rsp, 8));
2892 pusha();
2893 }
2894
2895 void MacroAssembler::reset_last_Java_frame(Register java_thread, bool clear_fp, bool clear_pc) {
2896 // determine java_thread register
2897 if (!java_thread->is_valid()) {
2898 java_thread = rdi;
2899 get_thread(java_thread);
2900 }
2901 // we must set sp to zero to clear frame
2902 movptr(Address(java_thread, JavaThread::last_Java_sp_offset()), NULL_WORD);
2903 if (clear_fp) {
2904 movptr(Address(java_thread, JavaThread::last_Java_fp_offset()), NULL_WORD);
2905 }
2906
2907 if (clear_pc)
2908 movptr(Address(java_thread, JavaThread::last_Java_pc_offset()), NULL_WORD);
2909
2910 }
2911
2912 void MacroAssembler::restore_rax(Register tmp) {
2913 if (tmp == noreg) pop(rax);
2914 else if (tmp != rax) mov(rax, tmp);
2915 }
2916
2917 void MacroAssembler::round_to(Register reg, int modulus) {
2918 addptr(reg, modulus - 1);
2919 andptr(reg, -modulus);
2920 }
2921
2922 void MacroAssembler::save_rax(Register tmp) {
2923 if (tmp == noreg) push(rax);
2924 else if (tmp != rax) mov(tmp, rax);
2925 }
2926
2927 // Write serialization page so VM thread can do a pseudo remote membar.
2928 // We use the current thread pointer to calculate a thread specific
2929 // offset to write to within the page. This minimizes bus traffic
2930 // due to cache line collision.
2931 void MacroAssembler::serialize_memory(Register thread, Register tmp) {
2932 movl(tmp, thread);
2933 shrl(tmp, os::get_serialize_page_shift_count());
2934 andl(tmp, (os::vm_page_size() - sizeof(int)));
2935
2936 Address index(noreg, tmp, Address::times_1);
2937 ExternalAddress page(os::get_memory_serialize_page());
2938
2939 // Size of store must match masking code above
2940 movl(as_Address(ArrayAddress(page, index)), tmp);
2941 }
2942
2943 // Calls to C land
2944 //
2945 // When entering C land, the rbp, & rsp of the last Java frame have to be recorded
2946 // in the (thread-local) JavaThread object. When leaving C land, the last Java fp
2947 // has to be reset to 0. This is required to allow proper stack traversal.
2948 void MacroAssembler::set_last_Java_frame(Register java_thread,
2949 Register last_java_sp,
2950 Register last_java_fp,
2951 address last_java_pc) {
2952 // determine java_thread register
2953 if (!java_thread->is_valid()) {
2954 java_thread = rdi;
2955 get_thread(java_thread);
2956 }
2957 // determine last_java_sp register
2958 if (!last_java_sp->is_valid()) {
2959 last_java_sp = rsp;
2960 }
2961
2962 // last_java_fp is optional
2963
2964 if (last_java_fp->is_valid()) {
2965 movptr(Address(java_thread, JavaThread::last_Java_fp_offset()), last_java_fp);
2966 }
2967
2968 // last_java_pc is optional
2969
2970 if (last_java_pc != NULL) {
2971 lea(Address(java_thread,
2972 JavaThread::frame_anchor_offset() + JavaFrameAnchor::last_Java_pc_offset()),
2973 InternalAddress(last_java_pc));
2974
2975 }
2976 movptr(Address(java_thread, JavaThread::last_Java_sp_offset()), last_java_sp);
2977 }
2978
2979 void MacroAssembler::shlptr(Register dst, int imm8) {
2980 LP64_ONLY(shlq(dst, imm8)) NOT_LP64(shll(dst, imm8));
2981 }
2982
2983 void MacroAssembler::shrptr(Register dst, int imm8) {
2984 LP64_ONLY(shrq(dst, imm8)) NOT_LP64(shrl(dst, imm8));
2985 }
2986
2987 void MacroAssembler::sign_extend_byte(Register reg) {
2988 if (LP64_ONLY(true ||) (VM_Version::is_P6() && reg->has_byte_register())) {
2989 movsbl(reg, reg); // movsxb
2990 } else {
2991 shll(reg, 24);
2992 sarl(reg, 24);
2993 }
2994 }
2995
2996 void MacroAssembler::sign_extend_short(Register reg) {
2997 if (LP64_ONLY(true ||) VM_Version::is_P6()) {
2998 movswl(reg, reg); // movsxw
2999 } else {
3000 shll(reg, 16);
3001 sarl(reg, 16);
3002 }
3003 }
3004
3005 void MacroAssembler::testl(Register dst, AddressLiteral src) {
3006 assert(reachable(src), "Address should be reachable");
3007 testl(dst, as_Address(src));
3008 }
3009
3010 void MacroAssembler::sqrtsd(XMMRegister dst, AddressLiteral src) {
3011 if (reachable(src)) {
3012 Assembler::sqrtsd(dst, as_Address(src));
3013 } else {
3014 lea(rscratch1, src);
3015 Assembler::sqrtsd(dst, Address(rscratch1, 0));
3016 }
3017 }
3018
3019 void MacroAssembler::sqrtss(XMMRegister dst, AddressLiteral src) {
3020 if (reachable(src)) {
3021 Assembler::sqrtss(dst, as_Address(src));
3022 } else {
3023 lea(rscratch1, src);
3024 Assembler::sqrtss(dst, Address(rscratch1, 0));
3025 }
3026 }
3027
3028 void MacroAssembler::subsd(XMMRegister dst, AddressLiteral src) {
3029 if (reachable(src)) {
3030 Assembler::subsd(dst, as_Address(src));
3031 } else {
3032 lea(rscratch1, src);
3033 Assembler::subsd(dst, Address(rscratch1, 0));
3034 }
3035 }
3036
3037 void MacroAssembler::subss(XMMRegister dst, AddressLiteral src) {
3038 if (reachable(src)) {
3039 Assembler::subss(dst, as_Address(src));
3040 } else {
3041 lea(rscratch1, src);
3042 Assembler::subss(dst, Address(rscratch1, 0));
3043 }
3044 }
3045
3046 void MacroAssembler::ucomisd(XMMRegister dst, AddressLiteral src) {
3047 if (reachable(src)) {
3048 Assembler::ucomisd(dst, as_Address(src));
3049 } else {
3050 lea(rscratch1, src);
3051 Assembler::ucomisd(dst, Address(rscratch1, 0));
3052 }
3053 }
3054
3055 void MacroAssembler::ucomiss(XMMRegister dst, AddressLiteral src) {
3056 if (reachable(src)) {
3057 Assembler::ucomiss(dst, as_Address(src));
3058 } else {
3059 lea(rscratch1, src);
3060 Assembler::ucomiss(dst, Address(rscratch1, 0));
3061 }
3062 }
3063
3064 void MacroAssembler::xorpd(XMMRegister dst, AddressLiteral src) {
3065 // Used in sign-bit flipping with aligned address.
3066 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes");
3067 if (reachable(src)) {
3068 Assembler::xorpd(dst, as_Address(src));
3069 } else {
3070 lea(rscratch1, src);
3071 Assembler::xorpd(dst, Address(rscratch1, 0));
3072 }
3073 }
3074
3075 void MacroAssembler::xorps(XMMRegister dst, AddressLiteral src) {
3076 // Used in sign-bit flipping with aligned address.
3077 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes");
3078 if (reachable(src)) {
3079 Assembler::xorps(dst, as_Address(src));
3080 } else {
3081 lea(rscratch1, src);
3082 Assembler::xorps(dst, Address(rscratch1, 0));
3083 }
3084 }
3085
3086 void MacroAssembler::pshufb(XMMRegister dst, AddressLiteral src) {
3087 // Used in sign-bit flipping with aligned address.
3088 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes");
3089 if (reachable(src)) {
3090 Assembler::pshufb(dst, as_Address(src));
3091 } else {
3092 lea(rscratch1, src);
3093 Assembler::pshufb(dst, Address(rscratch1, 0));
3094 }
3095 }
3096
3097 // AVX 3-operands instructions
3098
3099 void MacroAssembler::vaddsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
3100 if (reachable(src)) {
3101 vaddsd(dst, nds, as_Address(src));
3102 } else {
3103 lea(rscratch1, src);
3104 vaddsd(dst, nds, Address(rscratch1, 0));
3105 }
3106 }
3107
3108 void MacroAssembler::vaddss(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
3109 if (reachable(src)) {
3110 vaddss(dst, nds, as_Address(src));
3111 } else {
3112 lea(rscratch1, src);
3113 vaddss(dst, nds, Address(rscratch1, 0));
3114 }
3115 }
3116
3117 void MacroAssembler::vandpd(XMMRegister dst, XMMRegister nds, AddressLiteral src, bool vector256) {
3118 if (reachable(src)) {
3119 vandpd(dst, nds, as_Address(src), vector256);
3120 } else {
3121 lea(rscratch1, src);
3122 vandpd(dst, nds, Address(rscratch1, 0), vector256);
3123 }
3124 }
3125
3126 void MacroAssembler::vandps(XMMRegister dst, XMMRegister nds, AddressLiteral src, bool vector256) {
3127 if (reachable(src)) {
3128 vandps(dst, nds, as_Address(src), vector256);
3129 } else {
3130 lea(rscratch1, src);
3131 vandps(dst, nds, Address(rscratch1, 0), vector256);
3132 }
3133 }
3134
3135 void MacroAssembler::vdivsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
3136 if (reachable(src)) {
3137 vdivsd(dst, nds, as_Address(src));
3138 } else {
3139 lea(rscratch1, src);
3140 vdivsd(dst, nds, Address(rscratch1, 0));
3141 }
3142 }
3143
3144 void MacroAssembler::vdivss(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
3145 if (reachable(src)) {
3146 vdivss(dst, nds, as_Address(src));
3147 } else {
3148 lea(rscratch1, src);
3149 vdivss(dst, nds, Address(rscratch1, 0));
3150 }
3151 }
3152
3153 void MacroAssembler::vmulsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
3154 if (reachable(src)) {
3155 vmulsd(dst, nds, as_Address(src));
3156 } else {
3157 lea(rscratch1, src);
3158 vmulsd(dst, nds, Address(rscratch1, 0));
3159 }
3160 }
3161
3162 void MacroAssembler::vmulss(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
3163 if (reachable(src)) {
3164 vmulss(dst, nds, as_Address(src));
3165 } else {
3166 lea(rscratch1, src);
3167 vmulss(dst, nds, Address(rscratch1, 0));
3168 }
3169 }
3170
3171 void MacroAssembler::vsubsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
3172 if (reachable(src)) {
3173 vsubsd(dst, nds, as_Address(src));
3174 } else {
3175 lea(rscratch1, src);
3176 vsubsd(dst, nds, Address(rscratch1, 0));
3177 }
3178 }
3179
3180 void MacroAssembler::vsubss(XMMRegister dst, XMMRegister nds, AddressLiteral src) {
3181 if (reachable(src)) {
3182 vsubss(dst, nds, as_Address(src));
3183 } else {
3184 lea(rscratch1, src);
3185 vsubss(dst, nds, Address(rscratch1, 0));
3186 }
3187 }
3188
3189 void MacroAssembler::vxorpd(XMMRegister dst, XMMRegister nds, AddressLiteral src, bool vector256) {
3190 if (reachable(src)) {
3191 vxorpd(dst, nds, as_Address(src), vector256);
3192 } else {
3193 lea(rscratch1, src);
3194 vxorpd(dst, nds, Address(rscratch1, 0), vector256);
3195 }
3196 }
3197
3198 void MacroAssembler::vxorps(XMMRegister dst, XMMRegister nds, AddressLiteral src, bool vector256) {
3199 if (reachable(src)) {
3200 vxorps(dst, nds, as_Address(src), vector256);
3201 } else {
3202 lea(rscratch1, src);
3203 vxorps(dst, nds, Address(rscratch1, 0), vector256);
3204 }
3205 }
3206
3207
3208 //////////////////////////////////////////////////////////////////////////////////
3209 #ifndef SERIALGC
3210
3211 void MacroAssembler::g1_write_barrier_pre(Register obj,
3212 Register pre_val,
3213 Register thread,
3214 Register tmp,
3215 bool tosca_live,
3216 bool expand_call) {
3217
3218 // If expand_call is true then we expand the call_VM_leaf macro
3219 // directly to skip generating the check by
3220 // InterpreterMacroAssembler::call_VM_leaf_base that checks _last_sp.
3221
3222 #ifdef _LP64
3223 assert(thread == r15_thread, "must be");
3224 #endif // _LP64
3225
3226 Label done;
3227 Label runtime;
3228
3229 assert(pre_val != noreg, "check this code");
3230
3231 if (obj != noreg) {
3232 assert_different_registers(obj, pre_val, tmp);
3233 assert(pre_val != rax, "check this code");
3234 }
3235
3236 Address in_progress(thread, in_bytes(JavaThread::satb_mark_queue_offset() +
3237 PtrQueue::byte_offset_of_active()));
3238 Address index(thread, in_bytes(JavaThread::satb_mark_queue_offset() +
3239 PtrQueue::byte_offset_of_index()));
3240 Address buffer(thread, in_bytes(JavaThread::satb_mark_queue_offset() +
3241 PtrQueue::byte_offset_of_buf()));
3242
3243
3244 // Is marking active?
3245 if (in_bytes(PtrQueue::byte_width_of_active()) == 4) {
3246 cmpl(in_progress, 0);
3247 } else {
3248 assert(in_bytes(PtrQueue::byte_width_of_active()) == 1, "Assumption");
3249 cmpb(in_progress, 0);
3250 }
3251 jcc(Assembler::equal, done);
3252
3253 // Do we need to load the previous value?
3254 if (obj != noreg) {
3255 load_heap_oop(pre_val, Address(obj, 0));
3256 }
3257
3258 // Is the previous value null?
3259 cmpptr(pre_val, (int32_t) NULL_WORD);
3260 jcc(Assembler::equal, done);
3261
3262 // Can we store original value in the thread's buffer?
3263 // Is index == 0?
3264 // (The index field is typed as size_t.)
3265
3266 movptr(tmp, index); // tmp := *index_adr
3267 cmpptr(tmp, 0); // tmp == 0?
3268 jcc(Assembler::equal, runtime); // If yes, goto runtime
3269
3270 subptr(tmp, wordSize); // tmp := tmp - wordSize
3271 movptr(index, tmp); // *index_adr := tmp
3272 addptr(tmp, buffer); // tmp := tmp + *buffer_adr
3273
3274 // Record the previous value
3275 movptr(Address(tmp, 0), pre_val);
3276 jmp(done);
3277
3278 bind(runtime);
3279 // save the live input values
3280 if(tosca_live) push(rax);
3281
3282 if (obj != noreg && obj != rax)
3283 push(obj);
3284
3285 if (pre_val != rax)
3286 push(pre_val);
3287
3288 // Calling the runtime using the regular call_VM_leaf mechanism generates
3289 // code (generated by InterpreterMacroAssember::call_VM_leaf_base)
3290 // that checks that the *(ebp+frame::interpreter_frame_last_sp) == NULL.
3291 //
3292 // If we care generating the pre-barrier without a frame (e.g. in the
3293 // intrinsified Reference.get() routine) then ebp might be pointing to
3294 // the caller frame and so this check will most likely fail at runtime.
3295 //
3296 // Expanding the call directly bypasses the generation of the check.
3297 // So when we do not have have a full interpreter frame on the stack
3298 // expand_call should be passed true.
3299
3300 NOT_LP64( push(thread); )
3301
3302 if (expand_call) {
3303 LP64_ONLY( assert(pre_val != c_rarg1, "smashed arg"); )
3304 pass_arg1(this, thread);
3305 pass_arg0(this, pre_val);
3306 MacroAssembler::call_VM_leaf_base(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_pre), 2);
3307 } else {
3308 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_pre), pre_val, thread);
3309 }
3310
3311 NOT_LP64( pop(thread); )
3312
3313 // save the live input values
3314 if (pre_val != rax)
3315 pop(pre_val);
3316
3317 if (obj != noreg && obj != rax)
3318 pop(obj);
3319
3320 if(tosca_live) pop(rax);
3321
3322 bind(done);
3323 }
3324
3325 void MacroAssembler::g1_write_barrier_post(Register store_addr,
3326 Register new_val,
3327 Register thread,
3328 Register tmp,
3329 Register tmp2) {
3330 #ifdef _LP64
3331 assert(thread == r15_thread, "must be");
3332 #endif // _LP64
3333
3334 Address queue_index(thread, in_bytes(JavaThread::dirty_card_queue_offset() +
3335 PtrQueue::byte_offset_of_index()));
3336 Address buffer(thread, in_bytes(JavaThread::dirty_card_queue_offset() +
3337 PtrQueue::byte_offset_of_buf()));
3338
3339 BarrierSet* bs = Universe::heap()->barrier_set();
3340 CardTableModRefBS* ct = (CardTableModRefBS*)bs;
3341 Label done;
3342 Label runtime;
3343
3344 // Does store cross heap regions?
3345
3346 movptr(tmp, store_addr);
3347 xorptr(tmp, new_val);
3348 shrptr(tmp, HeapRegion::LogOfHRGrainBytes);
3349 jcc(Assembler::equal, done);
3350
3351 // crosses regions, storing NULL?
3352
3353 cmpptr(new_val, (int32_t) NULL_WORD);
3354 jcc(Assembler::equal, done);
3355
3356 // storing region crossing non-NULL, is card already dirty?
3357
3358 ExternalAddress cardtable((address) ct->byte_map_base);
3359 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code");
3360 #ifdef _LP64
3361 const Register card_addr = tmp;
3362
3363 movq(card_addr, store_addr);
3364 shrq(card_addr, CardTableModRefBS::card_shift);
3365
3366 lea(tmp2, cardtable);
3367
3368 // get the address of the card
3369 addq(card_addr, tmp2);
3370 #else
3371 const Register card_index = tmp;
3372
3373 movl(card_index, store_addr);
3374 shrl(card_index, CardTableModRefBS::card_shift);
3375
3376 Address index(noreg, card_index, Address::times_1);
3377 const Register card_addr = tmp;
3378 lea(card_addr, as_Address(ArrayAddress(cardtable, index)));
3379 #endif
3380 cmpb(Address(card_addr, 0), 0);
3381 jcc(Assembler::equal, done);
3382
3383 // storing a region crossing, non-NULL oop, card is clean.
3384 // dirty card and log.
3385
3386 movb(Address(card_addr, 0), 0);
3387
3388 cmpl(queue_index, 0);
3389 jcc(Assembler::equal, runtime);
3390 subl(queue_index, wordSize);
3391 movptr(tmp2, buffer);
3392 #ifdef _LP64
3393 movslq(rscratch1, queue_index);
3394 addq(tmp2, rscratch1);
3395 movq(Address(tmp2, 0), card_addr);
3396 #else
3397 addl(tmp2, queue_index);
3398 movl(Address(tmp2, 0), card_index);
3399 #endif
3400 jmp(done);
3401
3402 bind(runtime);
3403 // save the live input values
3404 push(store_addr);
3405 push(new_val);
3406 #ifdef _LP64
3407 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_post), card_addr, r15_thread);
3408 #else
3409 push(thread);
3410 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_post), card_addr, thread);
3411 pop(thread);
3412 #endif
3413 pop(new_val);
3414 pop(store_addr);
3415
3416 bind(done);
3417 }
3418
3419 #endif // SERIALGC
3420 //////////////////////////////////////////////////////////////////////////////////
3421
3422
3423 void MacroAssembler::store_check(Register obj) {
3424 // Does a store check for the oop in register obj. The content of
3425 // register obj is destroyed afterwards.
3426 store_check_part_1(obj);
3427 store_check_part_2(obj);
3428 }
3429
3430 void MacroAssembler::store_check(Register obj, Address dst) {
3431 store_check(obj);
3432 }
3433
3434
3435 // split the store check operation so that other instructions can be scheduled inbetween
3436 void MacroAssembler::store_check_part_1(Register obj) {
3437 BarrierSet* bs = Universe::heap()->barrier_set();
3438 assert(bs->kind() == BarrierSet::CardTableModRef, "Wrong barrier set kind");
3439 shrptr(obj, CardTableModRefBS::card_shift);
3440 }
3441
3442 void MacroAssembler::store_check_part_2(Register obj) {
3443 BarrierSet* bs = Universe::heap()->barrier_set();
3444 assert(bs->kind() == BarrierSet::CardTableModRef, "Wrong barrier set kind");
3445 CardTableModRefBS* ct = (CardTableModRefBS*)bs;
3446 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code");
3447
3448 // The calculation for byte_map_base is as follows:
3449 // byte_map_base = _byte_map - (uintptr_t(low_bound) >> card_shift);
3450 // So this essentially converts an address to a displacement and
3451 // it will never need to be relocated. On 64bit however the value may be too
3452 // large for a 32bit displacement
3453
3454 intptr_t disp = (intptr_t) ct->byte_map_base;
3455 if (is_simm32(disp)) {
3456 Address cardtable(noreg, obj, Address::times_1, disp);
3457 movb(cardtable, 0);
3458 } else {
3459 // By doing it as an ExternalAddress disp could be converted to a rip-relative
3460 // displacement and done in a single instruction given favorable mapping and
3461 // a smarter version of as_Address. Worst case it is two instructions which
3462 // is no worse off then loading disp into a register and doing as a simple
3463 // Address() as above.
3464 // We can't do as ExternalAddress as the only style since if disp == 0 we'll
3465 // assert since NULL isn't acceptable in a reloci (see 6644928). In any case
3466 // in some cases we'll get a single instruction version.
3467
3468 ExternalAddress cardtable((address)disp);
3469 Address index(noreg, obj, Address::times_1);
3470 movb(as_Address(ArrayAddress(cardtable, index)), 0);
3471 }
3472 }
3473
3474 void MacroAssembler::subptr(Register dst, int32_t imm32) {
3475 LP64_ONLY(subq(dst, imm32)) NOT_LP64(subl(dst, imm32));
3476 }
3477
3478 // Force generation of a 4 byte immediate value even if it fits into 8bit
3479 void MacroAssembler::subptr_imm32(Register dst, int32_t imm32) {
3480 LP64_ONLY(subq_imm32(dst, imm32)) NOT_LP64(subl_imm32(dst, imm32));
3481 }
3482
3483 void MacroAssembler::subptr(Register dst, Register src) {
3484 LP64_ONLY(subq(dst, src)) NOT_LP64(subl(dst, src));
3485 }
3486
3487 // C++ bool manipulation
3488 void MacroAssembler::testbool(Register dst) {
3489 if(sizeof(bool) == 1)
3490 testb(dst, 0xff);
3491 else if(sizeof(bool) == 2) {
3492 // testw implementation needed for two byte bools
3493 ShouldNotReachHere();
3494 } else if(sizeof(bool) == 4)
3495 testl(dst, dst);
3496 else
3497 // unsupported
3498 ShouldNotReachHere();
3499 }
3500
3501 void MacroAssembler::testptr(Register dst, Register src) {
3502 LP64_ONLY(testq(dst, src)) NOT_LP64(testl(dst, src));
3503 }
3504
3505 // Defines obj, preserves var_size_in_bytes, okay for t2 == var_size_in_bytes.
3506 void MacroAssembler::tlab_allocate(Register obj,
3507 Register var_size_in_bytes,
3508 int con_size_in_bytes,
3509 Register t1,
3510 Register t2,
3511 Label& slow_case) {
3512 assert_different_registers(obj, t1, t2);
3513 assert_different_registers(obj, var_size_in_bytes, t1);
3514 Register end = t2;
3515 Register thread = NOT_LP64(t1) LP64_ONLY(r15_thread);
3516
3517 verify_tlab();
3518
3519 NOT_LP64(get_thread(thread));
3520
3521 movptr(obj, Address(thread, JavaThread::tlab_top_offset()));
3522 if (var_size_in_bytes == noreg) {
3523 lea(end, Address(obj, con_size_in_bytes));
3524 } else {
3525 lea(end, Address(obj, var_size_in_bytes, Address::times_1));
3526 }
3527 cmpptr(end, Address(thread, JavaThread::tlab_end_offset()));
3528 jcc(Assembler::above, slow_case);
3529
3530 // update the tlab top pointer
3531 movptr(Address(thread, JavaThread::tlab_top_offset()), end);
3532
3533 // recover var_size_in_bytes if necessary
3534 if (var_size_in_bytes == end) {
3535 subptr(var_size_in_bytes, obj);
3536 }
3537 verify_tlab();
3538 }
3539
3540 // Preserves rbx, and rdx.
3541 Register MacroAssembler::tlab_refill(Label& retry,
3542 Label& try_eden,
3543 Label& slow_case) {
3544 Register top = rax;
3545 Register t1 = rcx;
3546 Register t2 = rsi;
3547 Register thread_reg = NOT_LP64(rdi) LP64_ONLY(r15_thread);
3548 assert_different_registers(top, thread_reg, t1, t2, /* preserve: */ rbx, rdx);
3549 Label do_refill, discard_tlab;
3550
3551 if (CMSIncrementalMode || !Universe::heap()->supports_inline_contig_alloc()) {
3552 // No allocation in the shared eden.
3553 jmp(slow_case);
3554 }
3555
3556 NOT_LP64(get_thread(thread_reg));
3557
3558 movptr(top, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset())));
3559 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_end_offset())));
3560
3561 // calculate amount of free space
3562 subptr(t1, top);
3563 shrptr(t1, LogHeapWordSize);
3564
3565 // Retain tlab and allocate object in shared space if
3566 // the amount free in the tlab is too large to discard.
3567 cmpptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_refill_waste_limit_offset())));
3568 jcc(Assembler::lessEqual, discard_tlab);
3569
3570 // Retain
3571 // %%% yuck as movptr...
3572 movptr(t2, (int32_t) ThreadLocalAllocBuffer::refill_waste_limit_increment());
3573 addptr(Address(thread_reg, in_bytes(JavaThread::tlab_refill_waste_limit_offset())), t2);
3574 if (TLABStats) {
3575 // increment number of slow_allocations
3576 addl(Address(thread_reg, in_bytes(JavaThread::tlab_slow_allocations_offset())), 1);
3577 }
3578 jmp(try_eden);
3579
3580 bind(discard_tlab);
3581 if (TLABStats) {
3582 // increment number of refills
3583 addl(Address(thread_reg, in_bytes(JavaThread::tlab_number_of_refills_offset())), 1);
3584 // accumulate wastage -- t1 is amount free in tlab
3585 addl(Address(thread_reg, in_bytes(JavaThread::tlab_fast_refill_waste_offset())), t1);
3586 }
3587
3588 // if tlab is currently allocated (top or end != null) then
3589 // fill [top, end + alignment_reserve) with array object
3590 testptr(top, top);
3591 jcc(Assembler::zero, do_refill);
3592
3593 // set up the mark word
3594 movptr(Address(top, oopDesc::mark_offset_in_bytes()), (intptr_t)markOopDesc::prototype()->copy_set_hash(0x2));
3595 // set the length to the remaining space
3596 subptr(t1, typeArrayOopDesc::header_size(T_INT));
3597 addptr(t1, (int32_t)ThreadLocalAllocBuffer::alignment_reserve());
3598 shlptr(t1, log2_intptr(HeapWordSize/sizeof(jint)));
3599 movl(Address(top, arrayOopDesc::length_offset_in_bytes()), t1);
3600 // set klass to intArrayKlass
3601 // dubious reloc why not an oop reloc?
3602 movptr(t1, ExternalAddress((address)Universe::intArrayKlassObj_addr()));
3603 // store klass last. concurrent gcs assumes klass length is valid if
3604 // klass field is not null.
3605 store_klass(top, t1);
3606
3607 movptr(t1, top);
3608 subptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_start_offset())));
3609 incr_allocated_bytes(thread_reg, t1, 0);
3610
3611 // refill the tlab with an eden allocation
3612 bind(do_refill);
3613 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_size_offset())));
3614 shlptr(t1, LogHeapWordSize);
3615 // allocate new tlab, address returned in top
3616 eden_allocate(top, t1, 0, t2, slow_case);
3617
3618 // Check that t1 was preserved in eden_allocate.
3619 #ifdef ASSERT
3620 if (UseTLAB) {
3621 Label ok;
3622 Register tsize = rsi;
3623 assert_different_registers(tsize, thread_reg, t1);
3624 push(tsize);
3625 movptr(tsize, Address(thread_reg, in_bytes(JavaThread::tlab_size_offset())));
3626 shlptr(tsize, LogHeapWordSize);
3627 cmpptr(t1, tsize);
3628 jcc(Assembler::equal, ok);
3629 STOP("assert(t1 != tlab size)");
3630 should_not_reach_here();
3631
3632 bind(ok);
3633 pop(tsize);
3634 }
3635 #endif
3636 movptr(Address(thread_reg, in_bytes(JavaThread::tlab_start_offset())), top);
3637 movptr(Address(thread_reg, in_bytes(JavaThread::tlab_top_offset())), top);
3638 addptr(top, t1);
3639 subptr(top, (int32_t)ThreadLocalAllocBuffer::alignment_reserve_in_bytes());
3640 movptr(Address(thread_reg, in_bytes(JavaThread::tlab_end_offset())), top);
3641 verify_tlab();
3642 jmp(retry);
3643
3644 return thread_reg; // for use by caller
3645 }
3646
3647 void MacroAssembler::incr_allocated_bytes(Register thread,
3648 Register var_size_in_bytes,
3649 int con_size_in_bytes,
3650 Register t1) {
3651 if (!thread->is_valid()) {
3652 #ifdef _LP64
3653 thread = r15_thread;
3654 #else
3655 assert(t1->is_valid(), "need temp reg");
3656 thread = t1;
3657 get_thread(thread);
3658 #endif
3659 }
3660
3661 #ifdef _LP64
3662 if (var_size_in_bytes->is_valid()) {
3663 addq(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), var_size_in_bytes);
3664 } else {
3665 addq(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), con_size_in_bytes);
3666 }
3667 #else
3668 if (var_size_in_bytes->is_valid()) {
3669 addl(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), var_size_in_bytes);
3670 } else {
3671 addl(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), con_size_in_bytes);
3672 }
3673 adcl(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())+4), 0);
3674 #endif
3675 }
3676
3677 void MacroAssembler::fp_runtime_fallback(address runtime_entry, int nb_args, int num_fpu_regs_in_use) {
3678 pusha();
3679
3680 // if we are coming from c1, xmm registers may be live
3681 int off = 0;
3682 if (UseSSE == 1) {
3683 subptr(rsp, sizeof(jdouble)*8);
3684 movflt(Address(rsp,off++*sizeof(jdouble)),xmm0);
3685 movflt(Address(rsp,off++*sizeof(jdouble)),xmm1);
3686 movflt(Address(rsp,off++*sizeof(jdouble)),xmm2);
3687 movflt(Address(rsp,off++*sizeof(jdouble)),xmm3);
3688 movflt(Address(rsp,off++*sizeof(jdouble)),xmm4);
3689 movflt(Address(rsp,off++*sizeof(jdouble)),xmm5);
3690 movflt(Address(rsp,off++*sizeof(jdouble)),xmm6);
3691 movflt(Address(rsp,off++*sizeof(jdouble)),xmm7);
3692 } else if (UseSSE >= 2) {
3693 #ifdef COMPILER2
3694 if (MaxVectorSize > 16) {
3695 assert(UseAVX > 0, "256bit vectors are supported only with AVX");
3696 // Save upper half of YMM registes
3697 subptr(rsp, 16 * LP64_ONLY(16) NOT_LP64(8));
3698 vextractf128h(Address(rsp, 0),xmm0);
3699 vextractf128h(Address(rsp, 16),xmm1);
3700 vextractf128h(Address(rsp, 32),xmm2);
3701 vextractf128h(Address(rsp, 48),xmm3);
3702 vextractf128h(Address(rsp, 64),xmm4);
3703 vextractf128h(Address(rsp, 80),xmm5);
3704 vextractf128h(Address(rsp, 96),xmm6);
3705 vextractf128h(Address(rsp,112),xmm7);
3706 #ifdef _LP64
3707 vextractf128h(Address(rsp,128),xmm8);
3708 vextractf128h(Address(rsp,144),xmm9);
3709 vextractf128h(Address(rsp,160),xmm10);
3710 vextractf128h(Address(rsp,176),xmm11);
3711 vextractf128h(Address(rsp,192),xmm12);
3712 vextractf128h(Address(rsp,208),xmm13);
3713 vextractf128h(Address(rsp,224),xmm14);
3714 vextractf128h(Address(rsp,240),xmm15);
3715 #endif
3716 }
3717 #endif
3718 // Save whole 128bit (16 bytes) XMM regiters
3719 subptr(rsp, 16 * LP64_ONLY(16) NOT_LP64(8));
3720 movdqu(Address(rsp,off++*16),xmm0);
3721 movdqu(Address(rsp,off++*16),xmm1);
3722 movdqu(Address(rsp,off++*16),xmm2);
3723 movdqu(Address(rsp,off++*16),xmm3);
3724 movdqu(Address(rsp,off++*16),xmm4);
3725 movdqu(Address(rsp,off++*16),xmm5);
3726 movdqu(Address(rsp,off++*16),xmm6);
3727 movdqu(Address(rsp,off++*16),xmm7);
3728 #ifdef _LP64
3729 movdqu(Address(rsp,off++*16),xmm8);
3730 movdqu(Address(rsp,off++*16),xmm9);
3731 movdqu(Address(rsp,off++*16),xmm10);
3732 movdqu(Address(rsp,off++*16),xmm11);
3733 movdqu(Address(rsp,off++*16),xmm12);
3734 movdqu(Address(rsp,off++*16),xmm13);
3735 movdqu(Address(rsp,off++*16),xmm14);
3736 movdqu(Address(rsp,off++*16),xmm15);
3737 #endif
3738 }
3739
3740 // Preserve registers across runtime call
3741 int incoming_argument_and_return_value_offset = -1;
3742 if (num_fpu_regs_in_use > 1) {
3743 // Must preserve all other FPU regs (could alternatively convert
3744 // SharedRuntime::dsin, dcos etc. into assembly routines known not to trash
3745 // FPU state, but can not trust C compiler)
3746 NEEDS_CLEANUP;
3747 // NOTE that in this case we also push the incoming argument(s) to
3748 // the stack and restore it later; we also use this stack slot to
3749 // hold the return value from dsin, dcos etc.
3750 for (int i = 0; i < num_fpu_regs_in_use; i++) {
3751 subptr(rsp, sizeof(jdouble));
3752 fstp_d(Address(rsp, 0));
3753 }
3754 incoming_argument_and_return_value_offset = sizeof(jdouble)*(num_fpu_regs_in_use-1);
3755 for (int i = nb_args-1; i >= 0; i--) {
3756 fld_d(Address(rsp, incoming_argument_and_return_value_offset-i*sizeof(jdouble)));
3757 }
3758 }
3759
3760 subptr(rsp, nb_args*sizeof(jdouble));
3761 for (int i = 0; i < nb_args; i++) {
3762 fstp_d(Address(rsp, i*sizeof(jdouble)));
3763 }
3764
3765 #ifdef _LP64
3766 if (nb_args > 0) {
3767 movdbl(xmm0, Address(rsp, 0));
3768 }
3769 if (nb_args > 1) {
3770 movdbl(xmm1, Address(rsp, sizeof(jdouble)));
3771 }
3772 assert(nb_args <= 2, "unsupported number of args");
3773 #endif // _LP64
3774
3775 // NOTE: we must not use call_VM_leaf here because that requires a
3776 // complete interpreter frame in debug mode -- same bug as 4387334
3777 // MacroAssembler::call_VM_leaf_base is perfectly safe and will
3778 // do proper 64bit abi
3779
3780 NEEDS_CLEANUP;
3781 // Need to add stack banging before this runtime call if it needs to
3782 // be taken; however, there is no generic stack banging routine at
3783 // the MacroAssembler level
3784
3785 MacroAssembler::call_VM_leaf_base(runtime_entry, 0);
3786
3787 #ifdef _LP64
3788 movsd(Address(rsp, 0), xmm0);
3789 fld_d(Address(rsp, 0));
3790 #endif // _LP64
3791 addptr(rsp, sizeof(jdouble) * nb_args);
3792 if (num_fpu_regs_in_use > 1) {
3793 // Must save return value to stack and then restore entire FPU
3794 // stack except incoming arguments
3795 fstp_d(Address(rsp, incoming_argument_and_return_value_offset));
3796 for (int i = 0; i < num_fpu_regs_in_use - nb_args; i++) {
3797 fld_d(Address(rsp, 0));
3798 addptr(rsp, sizeof(jdouble));
3799 }
3800 fld_d(Address(rsp, (nb_args-1)*sizeof(jdouble)));
3801 addptr(rsp, sizeof(jdouble) * nb_args);
3802 }
3803
3804 off = 0;
3805 if (UseSSE == 1) {
3806 movflt(xmm0, Address(rsp,off++*sizeof(jdouble)));
3807 movflt(xmm1, Address(rsp,off++*sizeof(jdouble)));
3808 movflt(xmm2, Address(rsp,off++*sizeof(jdouble)));
3809 movflt(xmm3, Address(rsp,off++*sizeof(jdouble)));
3810 movflt(xmm4, Address(rsp,off++*sizeof(jdouble)));
3811 movflt(xmm5, Address(rsp,off++*sizeof(jdouble)));
3812 movflt(xmm6, Address(rsp,off++*sizeof(jdouble)));
3813 movflt(xmm7, Address(rsp,off++*sizeof(jdouble)));
3814 addptr(rsp, sizeof(jdouble)*8);
3815 } else if (UseSSE >= 2) {
3816 // Restore whole 128bit (16 bytes) XMM regiters
3817 movdqu(xmm0, Address(rsp,off++*16));
3818 movdqu(xmm1, Address(rsp,off++*16));
3819 movdqu(xmm2, Address(rsp,off++*16));
3820 movdqu(xmm3, Address(rsp,off++*16));
3821 movdqu(xmm4, Address(rsp,off++*16));
3822 movdqu(xmm5, Address(rsp,off++*16));
3823 movdqu(xmm6, Address(rsp,off++*16));
3824 movdqu(xmm7, Address(rsp,off++*16));
3825 #ifdef _LP64
3826 movdqu(xmm8, Address(rsp,off++*16));
3827 movdqu(xmm9, Address(rsp,off++*16));
3828 movdqu(xmm10, Address(rsp,off++*16));
3829 movdqu(xmm11, Address(rsp,off++*16));
3830 movdqu(xmm12, Address(rsp,off++*16));
3831 movdqu(xmm13, Address(rsp,off++*16));
3832 movdqu(xmm14, Address(rsp,off++*16));
3833 movdqu(xmm15, Address(rsp,off++*16));
3834 #endif
3835 addptr(rsp, 16 * LP64_ONLY(16) NOT_LP64(8));
3836 #ifdef COMPILER2
3837 if (MaxVectorSize > 16) {
3838 // Restore upper half of YMM registes.
3839 vinsertf128h(xmm0, Address(rsp, 0));
3840 vinsertf128h(xmm1, Address(rsp, 16));
3841 vinsertf128h(xmm2, Address(rsp, 32));
3842 vinsertf128h(xmm3, Address(rsp, 48));
3843 vinsertf128h(xmm4, Address(rsp, 64));
3844 vinsertf128h(xmm5, Address(rsp, 80));
3845 vinsertf128h(xmm6, Address(rsp, 96));
3846 vinsertf128h(xmm7, Address(rsp,112));
3847 #ifdef _LP64
3848 vinsertf128h(xmm8, Address(rsp,128));
3849 vinsertf128h(xmm9, Address(rsp,144));
3850 vinsertf128h(xmm10, Address(rsp,160));
3851 vinsertf128h(xmm11, Address(rsp,176));
3852 vinsertf128h(xmm12, Address(rsp,192));
3853 vinsertf128h(xmm13, Address(rsp,208));
3854 vinsertf128h(xmm14, Address(rsp,224));
3855 vinsertf128h(xmm15, Address(rsp,240));
3856 #endif
3857 addptr(rsp, 16 * LP64_ONLY(16) NOT_LP64(8));
3858 }
3859 #endif
3860 }
3861 popa();
3862 }
3863
3864 static const double pi_4 = 0.7853981633974483;
3865
3866 void MacroAssembler::trigfunc(char trig, int num_fpu_regs_in_use) {
3867 // A hand-coded argument reduction for values in fabs(pi/4, pi/2)
3868 // was attempted in this code; unfortunately it appears that the
3869 // switch to 80-bit precision and back causes this to be
3870 // unprofitable compared with simply performing a runtime call if
3871 // the argument is out of the (-pi/4, pi/4) range.
3872
3873 Register tmp = noreg;
3874 if (!VM_Version::supports_cmov()) {
3875 // fcmp needs a temporary so preserve rbx,
3876 tmp = rbx;
3877 push(tmp);
3878 }
3879
3880 Label slow_case, done;
3881
3882 ExternalAddress pi4_adr = (address)&pi_4;
3883 if (reachable(pi4_adr)) {
3884 // x ?<= pi/4
3885 fld_d(pi4_adr);
3886 fld_s(1); // Stack: X PI/4 X
3887 fabs(); // Stack: |X| PI/4 X
3888 fcmp(tmp);
3889 jcc(Assembler::above, slow_case);
3890
3891 // fastest case: -pi/4 <= x <= pi/4
3892 switch(trig) {
3893 case 's':
3894 fsin();
3895 break;
3896 case 'c':
3897 fcos();
3898 break;
3899 case 't':
3900 ftan();
3901 break;
3902 default:
3903 assert(false, "bad intrinsic");
3904 break;
3905 }
3906 jmp(done);
3907 }
3908
3909 // slow case: runtime call
3910 bind(slow_case);
3911
3912 switch(trig) {
3913 case 's':
3914 {
3915 fp_runtime_fallback(CAST_FROM_FN_PTR(address, SharedRuntime::dsin), 1, num_fpu_regs_in_use);
3916 }
3917 break;
3918 case 'c':
3919 {
3920 fp_runtime_fallback(CAST_FROM_FN_PTR(address, SharedRuntime::dcos), 1, num_fpu_regs_in_use);
3921 }
3922 break;
3923 case 't':
3924 {
3925 fp_runtime_fallback(CAST_FROM_FN_PTR(address, SharedRuntime::dtan), 1, num_fpu_regs_in_use);
3926 }
3927 break;
3928 default:
3929 assert(false, "bad intrinsic");
3930 break;
3931 }
3932
3933 // Come here with result in F-TOS
3934 bind(done);
3935
3936 if (tmp != noreg) {
3937 pop(tmp);
3938 }
3939 }
3940
3941
3942 // Look up the method for a megamorphic invokeinterface call.
3943 // The target method is determined by <intf_klass, itable_index>.
3944 // The receiver klass is in recv_klass.
3945 // On success, the result will be in method_result, and execution falls through.
3946 // On failure, execution transfers to the given label.
3947 void MacroAssembler::lookup_interface_method(Register recv_klass,
3948 Register intf_klass,
3949 RegisterOrConstant itable_index,
3950 Register method_result,
3951 Register scan_temp,
3952 Label& L_no_such_interface) {
3953 assert_different_registers(recv_klass, intf_klass, method_result, scan_temp);
3954 assert(itable_index.is_constant() || itable_index.as_register() == method_result,
3955 "caller must use same register for non-constant itable index as for method");
3956
3957 // Compute start of first itableOffsetEntry (which is at the end of the vtable)
3958 int vtable_base = InstanceKlass::vtable_start_offset() * wordSize;
3959 int itentry_off = itableMethodEntry::method_offset_in_bytes();
3960 int scan_step = itableOffsetEntry::size() * wordSize;
3961 int vte_size = vtableEntry::size() * wordSize;
3962 Address::ScaleFactor times_vte_scale = Address::times_ptr;
3963 assert(vte_size == wordSize, "else adjust times_vte_scale");
3964
3965 movl(scan_temp, Address(recv_klass, InstanceKlass::vtable_length_offset() * wordSize));
3966
3967 // %%% Could store the aligned, prescaled offset in the klassoop.
3968 lea(scan_temp, Address(recv_klass, scan_temp, times_vte_scale, vtable_base));
3969 if (HeapWordsPerLong > 1) {
3970 // Round up to align_object_offset boundary
3971 // see code for InstanceKlass::start_of_itable!
3972 round_to(scan_temp, BytesPerLong);
3973 }
3974
3975 // Adjust recv_klass by scaled itable_index, so we can free itable_index.
3976 assert(itableMethodEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
3977 lea(recv_klass, Address(recv_klass, itable_index, Address::times_ptr, itentry_off));
3978
3979 // for (scan = klass->itable(); scan->interface() != NULL; scan += scan_step) {
3980 // if (scan->interface() == intf) {
3981 // result = (klass + scan->offset() + itable_index);
3982 // }
3983 // }
3984 Label search, found_method;
3985
3986 for (int peel = 1; peel >= 0; peel--) {
3987 movptr(method_result, Address(scan_temp, itableOffsetEntry::interface_offset_in_bytes()));
3988 cmpptr(intf_klass, method_result);
3989
3990 if (peel) {
3991 jccb(Assembler::equal, found_method);
3992 } else {
3993 jccb(Assembler::notEqual, search);
3994 // (invert the test to fall through to found_method...)
3995 }
3996
3997 if (!peel) break;
3998
3999 bind(search);
4000
4001 // Check that the previous entry is non-null. A null entry means that
4002 // the receiver class doesn't implement the interface, and wasn't the
4003 // same as when the caller was compiled.
4004 testptr(method_result, method_result);
4005 jcc(Assembler::zero, L_no_such_interface);
4006 addptr(scan_temp, scan_step);
4007 }
4008
4009 bind(found_method);
4010
4011 // Got a hit.
4012 movl(scan_temp, Address(scan_temp, itableOffsetEntry::offset_offset_in_bytes()));
4013 movptr(method_result, Address(recv_klass, scan_temp, Address::times_1));
4014 }
4015
4016
4017 // virtual method calling
4018 void MacroAssembler::lookup_virtual_method(Register recv_klass,
4019 RegisterOrConstant vtable_index,
4020 Register method_result) {
4021 const int base = InstanceKlass::vtable_start_offset() * wordSize;
4022 assert(vtableEntry::size() * wordSize == wordSize, "else adjust the scaling in the code below");
4023 Address vtable_entry_addr(recv_klass,
4024 vtable_index, Address::times_ptr,
4025 base + vtableEntry::method_offset_in_bytes());
4026 movptr(method_result, vtable_entry_addr);
4027 }
4028
4029
4030 void MacroAssembler::check_klass_subtype(Register sub_klass,
4031 Register super_klass,
4032 Register temp_reg,
4033 Label& L_success) {
4034 Label L_failure;
4035 check_klass_subtype_fast_path(sub_klass, super_klass, temp_reg, &L_success, &L_failure, NULL);
4036 check_klass_subtype_slow_path(sub_klass, super_klass, temp_reg, noreg, &L_success, NULL);
4037 bind(L_failure);
4038 }
4039
4040
4041 void MacroAssembler::check_klass_subtype_fast_path(Register sub_klass,
4042 Register super_klass,
4043 Register temp_reg,
4044 Label* L_success,
4045 Label* L_failure,
4046 Label* L_slow_path,
4047 RegisterOrConstant super_check_offset) {
4048 assert_different_registers(sub_klass, super_klass, temp_reg);
4049 bool must_load_sco = (super_check_offset.constant_or_zero() == -1);
4050 if (super_check_offset.is_register()) {
4051 assert_different_registers(sub_klass, super_klass,
4052 super_check_offset.as_register());
4053 } else if (must_load_sco) {
4054 assert(temp_reg != noreg, "supply either a temp or a register offset");
4055 }
4056
4057 Label L_fallthrough;
4058 int label_nulls = 0;
4059 if (L_success == NULL) { L_success = &L_fallthrough; label_nulls++; }
4060 if (L_failure == NULL) { L_failure = &L_fallthrough; label_nulls++; }
4061 if (L_slow_path == NULL) { L_slow_path = &L_fallthrough; label_nulls++; }
4062 assert(label_nulls <= 1, "at most one NULL in the batch");
4063
4064 int sc_offset = in_bytes(Klass::secondary_super_cache_offset());
4065 int sco_offset = in_bytes(Klass::super_check_offset_offset());
4066 Address super_check_offset_addr(super_klass, sco_offset);
4067
4068 // Hacked jcc, which "knows" that L_fallthrough, at least, is in
4069 // range of a jccb. If this routine grows larger, reconsider at
4070 // least some of these.
4071 #define local_jcc(assembler_cond, label) \
4072 if (&(label) == &L_fallthrough) jccb(assembler_cond, label); \
4073 else jcc( assembler_cond, label) /*omit semi*/
4074
4075 // Hacked jmp, which may only be used just before L_fallthrough.
4076 #define final_jmp(label) \
4077 if (&(label) == &L_fallthrough) { /*do nothing*/ } \
4078 else jmp(label) /*omit semi*/
4079
4080 // If the pointers are equal, we are done (e.g., String[] elements).
4081 // This self-check enables sharing of secondary supertype arrays among
4082 // non-primary types such as array-of-interface. Otherwise, each such
4083 // type would need its own customized SSA.
4084 // We move this check to the front of the fast path because many
4085 // type checks are in fact trivially successful in this manner,
4086 // so we get a nicely predicted branch right at the start of the check.
4087 cmpptr(sub_klass, super_klass);
4088 local_jcc(Assembler::equal, *L_success);
4089
4090 // Check the supertype display:
4091 if (must_load_sco) {
4092 // Positive movl does right thing on LP64.
4093 movl(temp_reg, super_check_offset_addr);
4094 super_check_offset = RegisterOrConstant(temp_reg);
4095 }
4096 Address super_check_addr(sub_klass, super_check_offset, Address::times_1, 0);
4097 cmpptr(super_klass, super_check_addr); // load displayed supertype
4098
4099 // This check has worked decisively for primary supers.
4100 // Secondary supers are sought in the super_cache ('super_cache_addr').
4101 // (Secondary supers are interfaces and very deeply nested subtypes.)
4102 // This works in the same check above because of a tricky aliasing
4103 // between the super_cache and the primary super display elements.
4104 // (The 'super_check_addr' can address either, as the case requires.)
4105 // Note that the cache is updated below if it does not help us find
4106 // what we need immediately.
4107 // So if it was a primary super, we can just fail immediately.
4108 // Otherwise, it's the slow path for us (no success at this point).
4109
4110 if (super_check_offset.is_register()) {
4111 local_jcc(Assembler::equal, *L_success);
4112 cmpl(super_check_offset.as_register(), sc_offset);
4113 if (L_failure == &L_fallthrough) {
4114 local_jcc(Assembler::equal, *L_slow_path);
4115 } else {
4116 local_jcc(Assembler::notEqual, *L_failure);
4117 final_jmp(*L_slow_path);
4118 }
4119 } else if (super_check_offset.as_constant() == sc_offset) {
4120 // Need a slow path; fast failure is impossible.
4121 if (L_slow_path == &L_fallthrough) {
4122 local_jcc(Assembler::equal, *L_success);
4123 } else {
4124 local_jcc(Assembler::notEqual, *L_slow_path);
4125 final_jmp(*L_success);
4126 }
4127 } else {
4128 // No slow path; it's a fast decision.
4129 if (L_failure == &L_fallthrough) {
4130 local_jcc(Assembler::equal, *L_success);
4131 } else {
4132 local_jcc(Assembler::notEqual, *L_failure);
4133 final_jmp(*L_success);
4134 }
4135 }
4136
4137 bind(L_fallthrough);
4138
4139 #undef local_jcc
4140 #undef final_jmp
4141 }
4142
4143
4144 void MacroAssembler::check_klass_subtype_slow_path(Register sub_klass,
4145 Register super_klass,
4146 Register temp_reg,
4147 Register temp2_reg,
4148 Label* L_success,
4149 Label* L_failure,
4150 bool set_cond_codes) {
4151 assert_different_registers(sub_klass, super_klass, temp_reg);
4152 if (temp2_reg != noreg)
4153 assert_different_registers(sub_klass, super_klass, temp_reg, temp2_reg);
4154 #define IS_A_TEMP(reg) ((reg) == temp_reg || (reg) == temp2_reg)
4155
4156 Label L_fallthrough;
4157 int label_nulls = 0;
4158 if (L_success == NULL) { L_success = &L_fallthrough; label_nulls++; }
4159 if (L_failure == NULL) { L_failure = &L_fallthrough; label_nulls++; }
4160 assert(label_nulls <= 1, "at most one NULL in the batch");
4161
4162 // a couple of useful fields in sub_klass:
4163 int ss_offset = in_bytes(Klass::secondary_supers_offset());
4164 int sc_offset = in_bytes(Klass::secondary_super_cache_offset());
4165 Address secondary_supers_addr(sub_klass, ss_offset);
4166 Address super_cache_addr( sub_klass, sc_offset);
4167
4168 // Do a linear scan of the secondary super-klass chain.
4169 // This code is rarely used, so simplicity is a virtue here.
4170 // The repne_scan instruction uses fixed registers, which we must spill.
4171 // Don't worry too much about pre-existing connections with the input regs.
4172
4173 assert(sub_klass != rax, "killed reg"); // killed by mov(rax, super)
4174 assert(sub_klass != rcx, "killed reg"); // killed by lea(rcx, &pst_counter)
4175
4176 // Get super_klass value into rax (even if it was in rdi or rcx).
4177 bool pushed_rax = false, pushed_rcx = false, pushed_rdi = false;
4178 if (super_klass != rax || UseCompressedOops) {
4179 if (!IS_A_TEMP(rax)) { push(rax); pushed_rax = true; }
4180 mov(rax, super_klass);
4181 }
4182 if (!IS_A_TEMP(rcx)) { push(rcx); pushed_rcx = true; }
4183 if (!IS_A_TEMP(rdi)) { push(rdi); pushed_rdi = true; }
4184
4185 #ifndef PRODUCT
4186 int* pst_counter = &SharedRuntime::_partial_subtype_ctr;
4187 ExternalAddress pst_counter_addr((address) pst_counter);
4188 NOT_LP64( incrementl(pst_counter_addr) );
4189 LP64_ONLY( lea(rcx, pst_counter_addr) );
4190 LP64_ONLY( incrementl(Address(rcx, 0)) );
4191 #endif //PRODUCT
4192
4193 // We will consult the secondary-super array.
4194 movptr(rdi, secondary_supers_addr);
4195 // Load the array length. (Positive movl does right thing on LP64.)
4196 movl(rcx, Address(rdi, Array<Klass*>::length_offset_in_bytes()));
4197 // Skip to start of data.
4198 addptr(rdi, Array<Klass*>::base_offset_in_bytes());
4199
4200 // Scan RCX words at [RDI] for an occurrence of RAX.
4201 // Set NZ/Z based on last compare.
4202 // Z flag value will not be set by 'repne' if RCX == 0 since 'repne' does
4203 // not change flags (only scas instruction which is repeated sets flags).
4204 // Set Z = 0 (not equal) before 'repne' to indicate that class was not found.
4205
4206 testptr(rax,rax); // Set Z = 0
4207 repne_scan();
4208
4209 // Unspill the temp. registers:
4210 if (pushed_rdi) pop(rdi);
4211 if (pushed_rcx) pop(rcx);
4212 if (pushed_rax) pop(rax);
4213
4214 if (set_cond_codes) {
4215 // Special hack for the AD files: rdi is guaranteed non-zero.
4216 assert(!pushed_rdi, "rdi must be left non-NULL");
4217 // Also, the condition codes are properly set Z/NZ on succeed/failure.
4218 }
4219
4220 if (L_failure == &L_fallthrough)
4221 jccb(Assembler::notEqual, *L_failure);
4222 else jcc(Assembler::notEqual, *L_failure);
4223
4224 // Success. Cache the super we found and proceed in triumph.
4225 movptr(super_cache_addr, super_klass);
4226
4227 if (L_success != &L_fallthrough) {
4228 jmp(*L_success);
4229 }
4230
4231 #undef IS_A_TEMP
4232
4233 bind(L_fallthrough);
4234 }
4235
4236
4237 void MacroAssembler::cmov32(Condition cc, Register dst, Address src) {
4238 if (VM_Version::supports_cmov()) {
4239 cmovl(cc, dst, src);
4240 } else {
4241 Label L;
4242 jccb(negate_condition(cc), L);
4243 movl(dst, src);
4244 bind(L);
4245 }
4246 }
4247
4248 void MacroAssembler::cmov32(Condition cc, Register dst, Register src) {
4249 if (VM_Version::supports_cmov()) {
4250 cmovl(cc, dst, src);
4251 } else {
4252 Label L;
4253 jccb(negate_condition(cc), L);
4254 movl(dst, src);
4255 bind(L);
4256 }
4257 }
4258
4259 void MacroAssembler::verify_oop(Register reg, const char* s) {
4260 if (!VerifyOops) return;
4261
4262 // Pass register number to verify_oop_subroutine
4263 char* b = new char[strlen(s) + 50];
4264 sprintf(b, "verify_oop: %s: %s", reg->name(), s);
4265 BLOCK_COMMENT("verify_oop {");
4266 #ifdef _LP64
4267 push(rscratch1); // save r10, trashed by movptr()
4268 #endif
4269 push(rax); // save rax,
4270 push(reg); // pass register argument
4271 ExternalAddress buffer((address) b);
4272 // avoid using pushptr, as it modifies scratch registers
4273 // and our contract is not to modify anything
4274 movptr(rax, buffer.addr());
4275 push(rax);
4276 // call indirectly to solve generation ordering problem
4277 movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address()));
4278 call(rax);
4279 // Caller pops the arguments (oop, message) and restores rax, r10
4280 BLOCK_COMMENT("} verify_oop");
4281 }
4282
4283
4284 RegisterOrConstant MacroAssembler::delayed_value_impl(intptr_t* delayed_value_addr,
4285 Register tmp,
4286 int offset) {
4287 intptr_t value = *delayed_value_addr;
4288 if (value != 0)
4289 return RegisterOrConstant(value + offset);
4290
4291 // load indirectly to solve generation ordering problem
4292 movptr(tmp, ExternalAddress((address) delayed_value_addr));
4293
4294 #ifdef ASSERT
4295 { Label L;
4296 testptr(tmp, tmp);
4297 if (WizardMode) {
4298 jcc(Assembler::notZero, L);
4299 char* buf = new char[40];
4300 sprintf(buf, "DelayedValue="INTPTR_FORMAT, delayed_value_addr[1]);
4301 STOP(buf);
4302 } else {
4303 jccb(Assembler::notZero, L);
4304 hlt();
4305 }
4306 bind(L);
4307 }
4308 #endif
4309
4310 if (offset != 0)
4311 addptr(tmp, offset);
4312
4313 return RegisterOrConstant(tmp);
4314 }
4315
4316
4317 Address MacroAssembler::argument_address(RegisterOrConstant arg_slot,
4318 int extra_slot_offset) {
4319 // cf. TemplateTable::prepare_invoke(), if (load_receiver).
4320 int stackElementSize = Interpreter::stackElementSize;
4321 int offset = Interpreter::expr_offset_in_bytes(extra_slot_offset+0);
4322 #ifdef ASSERT
4323 int offset1 = Interpreter::expr_offset_in_bytes(extra_slot_offset+1);
4324 assert(offset1 - offset == stackElementSize, "correct arithmetic");
4325 #endif
4326 Register scale_reg = noreg;
4327 Address::ScaleFactor scale_factor = Address::no_scale;
4328 if (arg_slot.is_constant()) {
4329 offset += arg_slot.as_constant() * stackElementSize;
4330 } else {
4331 scale_reg = arg_slot.as_register();
4332 scale_factor = Address::times(stackElementSize);
4333 }
4334 offset += wordSize; // return PC is on stack
4335 return Address(rsp, scale_reg, scale_factor, offset);
4336 }
4337
4338
4339 void MacroAssembler::verify_oop_addr(Address addr, const char* s) {
4340 if (!VerifyOops) return;
4341
4342 // Address adjust(addr.base(), addr.index(), addr.scale(), addr.disp() + BytesPerWord);
4343 // Pass register number to verify_oop_subroutine
4344 char* b = new char[strlen(s) + 50];
4345 sprintf(b, "verify_oop_addr: %s", s);
4346
4347 #ifdef _LP64
4348 push(rscratch1); // save r10, trashed by movptr()
4349 #endif
4350 push(rax); // save rax,
4351 // addr may contain rsp so we will have to adjust it based on the push
4352 // we just did (and on 64 bit we do two pushes)
4353 // NOTE: 64bit seemed to have had a bug in that it did movq(addr, rax); which
4354 // stores rax into addr which is backwards of what was intended.
4355 if (addr.uses(rsp)) {
4356 lea(rax, addr);
4357 pushptr(Address(rax, LP64_ONLY(2 *) BytesPerWord));
4358 } else {
4359 pushptr(addr);
4360 }
4361
4362 ExternalAddress buffer((address) b);
4363 // pass msg argument
4364 // avoid using pushptr, as it modifies scratch registers
4365 // and our contract is not to modify anything
4366 movptr(rax, buffer.addr());
4367 push(rax);
4368
4369 // call indirectly to solve generation ordering problem
4370 movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address()));
4371 call(rax);
4372 // Caller pops the arguments (addr, message) and restores rax, r10.
4373 }
4374
4375 void MacroAssembler::verify_tlab() {
4376 #ifdef ASSERT
4377 if (UseTLAB && VerifyOops) {
4378 Label next, ok;
4379 Register t1 = rsi;
4380 Register thread_reg = NOT_LP64(rbx) LP64_ONLY(r15_thread);
4381
4382 push(t1);
4383 NOT_LP64(push(thread_reg));
4384 NOT_LP64(get_thread(thread_reg));
4385
4386 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset())));
4387 cmpptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_start_offset())));
4388 jcc(Assembler::aboveEqual, next);
4389 STOP("assert(top >= start)");
4390 should_not_reach_here();
4391
4392 bind(next);
4393 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_end_offset())));
4394 cmpptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset())));
4395 jcc(Assembler::aboveEqual, ok);
4396 STOP("assert(top <= end)");
4397 should_not_reach_here();
4398
4399 bind(ok);
4400 NOT_LP64(pop(thread_reg));
4401 pop(t1);
4402 }
4403 #endif
4404 }
4405
4406 class ControlWord {
4407 public:
4408 int32_t _value;
4409
4410 int rounding_control() const { return (_value >> 10) & 3 ; }
4411 int precision_control() const { return (_value >> 8) & 3 ; }
4412 bool precision() const { return ((_value >> 5) & 1) != 0; }
4413 bool underflow() const { return ((_value >> 4) & 1) != 0; }
4414 bool overflow() const { return ((_value >> 3) & 1) != 0; }
4415 bool zero_divide() const { return ((_value >> 2) & 1) != 0; }
4416 bool denormalized() const { return ((_value >> 1) & 1) != 0; }
4417 bool invalid() const { return ((_value >> 0) & 1) != 0; }
4418
4419 void print() const {
4420 // rounding control
4421 const char* rc;
4422 switch (rounding_control()) {
4423 case 0: rc = "round near"; break;
4424 case 1: rc = "round down"; break;
4425 case 2: rc = "round up "; break;
4426 case 3: rc = "chop "; break;
4427 };
4428 // precision control
4429 const char* pc;
4430 switch (precision_control()) {
4431 case 0: pc = "24 bits "; break;
4432 case 1: pc = "reserved"; break;
4433 case 2: pc = "53 bits "; break;
4434 case 3: pc = "64 bits "; break;
4435 };
4436 // flags
4437 char f[9];
4438 f[0] = ' ';
4439 f[1] = ' ';
4440 f[2] = (precision ()) ? 'P' : 'p';
4441 f[3] = (underflow ()) ? 'U' : 'u';
4442 f[4] = (overflow ()) ? 'O' : 'o';
4443 f[5] = (zero_divide ()) ? 'Z' : 'z';
4444 f[6] = (denormalized()) ? 'D' : 'd';
4445 f[7] = (invalid ()) ? 'I' : 'i';
4446 f[8] = '\x0';
4447 // output
4448 printf("%04x masks = %s, %s, %s", _value & 0xFFFF, f, rc, pc);
4449 }
4450
4451 };
4452
4453 class StatusWord {
4454 public:
4455 int32_t _value;
4456
4457 bool busy() const { return ((_value >> 15) & 1) != 0; }
4458 bool C3() const { return ((_value >> 14) & 1) != 0; }
4459 bool C2() const { return ((_value >> 10) & 1) != 0; }
4460 bool C1() const { return ((_value >> 9) & 1) != 0; }
4461 bool C0() const { return ((_value >> 8) & 1) != 0; }
4462 int top() const { return (_value >> 11) & 7 ; }
4463 bool error_status() const { return ((_value >> 7) & 1) != 0; }
4464 bool stack_fault() const { return ((_value >> 6) & 1) != 0; }
4465 bool precision() const { return ((_value >> 5) & 1) != 0; }
4466 bool underflow() const { return ((_value >> 4) & 1) != 0; }
4467 bool overflow() const { return ((_value >> 3) & 1) != 0; }
4468 bool zero_divide() const { return ((_value >> 2) & 1) != 0; }
4469 bool denormalized() const { return ((_value >> 1) & 1) != 0; }
4470 bool invalid() const { return ((_value >> 0) & 1) != 0; }
4471
4472 void print() const {
4473 // condition codes
4474 char c[5];
4475 c[0] = (C3()) ? '3' : '-';
4476 c[1] = (C2()) ? '2' : '-';
4477 c[2] = (C1()) ? '1' : '-';
4478 c[3] = (C0()) ? '0' : '-';
4479 c[4] = '\x0';
4480 // flags
4481 char f[9];
4482 f[0] = (error_status()) ? 'E' : '-';
4483 f[1] = (stack_fault ()) ? 'S' : '-';
4484 f[2] = (precision ()) ? 'P' : '-';
4485 f[3] = (underflow ()) ? 'U' : '-';
4486 f[4] = (overflow ()) ? 'O' : '-';
4487 f[5] = (zero_divide ()) ? 'Z' : '-';
4488 f[6] = (denormalized()) ? 'D' : '-';
4489 f[7] = (invalid ()) ? 'I' : '-';
4490 f[8] = '\x0';
4491 // output
4492 printf("%04x flags = %s, cc = %s, top = %d", _value & 0xFFFF, f, c, top());
4493 }
4494
4495 };
4496
4497 class TagWord {
4498 public:
4499 int32_t _value;
4500
4501 int tag_at(int i) const { return (_value >> (i*2)) & 3; }
4502
4503 void print() const {
4504 printf("%04x", _value & 0xFFFF);
4505 }
4506
4507 };
4508
4509 class FPU_Register {
4510 public:
4511 int32_t _m0;
4512 int32_t _m1;
4513 int16_t _ex;
4514
4515 bool is_indefinite() const {
4516 return _ex == -1 && _m1 == (int32_t)0xC0000000 && _m0 == 0;
4517 }
4518
4519 void print() const {
4520 char sign = (_ex < 0) ? '-' : '+';
4521 const char* kind = (_ex == 0x7FFF || _ex == (int16_t)-1) ? "NaN" : " ";
4522 printf("%c%04hx.%08x%08x %s", sign, _ex, _m1, _m0, kind);
4523 };
4524
4525 };
4526
4527 class FPU_State {
4528 public:
4529 enum {
4530 register_size = 10,
4531 number_of_registers = 8,
4532 register_mask = 7
4533 };
4534
4535 ControlWord _control_word;
4536 StatusWord _status_word;
4537 TagWord _tag_word;
4538 int32_t _error_offset;
4539 int32_t _error_selector;
4540 int32_t _data_offset;
4541 int32_t _data_selector;
4542 int8_t _register[register_size * number_of_registers];
4543
4544 int tag_for_st(int i) const { return _tag_word.tag_at((_status_word.top() + i) & register_mask); }
4545 FPU_Register* st(int i) const { return (FPU_Register*)&_register[register_size * i]; }
4546
4547 const char* tag_as_string(int tag) const {
4548 switch (tag) {
4549 case 0: return "valid";
4550 case 1: return "zero";
4551 case 2: return "special";
4552 case 3: return "empty";
4553 }
4554 ShouldNotReachHere();
4555 return NULL;
4556 }
4557
4558 void print() const {
4559 // print computation registers
4560 { int t = _status_word.top();
4561 for (int i = 0; i < number_of_registers; i++) {
4562 int j = (i - t) & register_mask;
4563 printf("%c r%d = ST%d = ", (j == 0 ? '*' : ' '), i, j);
4564 st(j)->print();
4565 printf(" %s\n", tag_as_string(_tag_word.tag_at(i)));
4566 }
4567 }
4568 printf("\n");
4569 // print control registers
4570 printf("ctrl = "); _control_word.print(); printf("\n");
4571 printf("stat = "); _status_word .print(); printf("\n");
4572 printf("tags = "); _tag_word .print(); printf("\n");
4573 }
4574
4575 };
4576
4577 class Flag_Register {
4578 public:
4579 int32_t _value;
4580
4581 bool overflow() const { return ((_value >> 11) & 1) != 0; }
4582 bool direction() const { return ((_value >> 10) & 1) != 0; }
4583 bool sign() const { return ((_value >> 7) & 1) != 0; }
4584 bool zero() const { return ((_value >> 6) & 1) != 0; }
4585 bool auxiliary_carry() const { return ((_value >> 4) & 1) != 0; }
4586 bool parity() const { return ((_value >> 2) & 1) != 0; }
4587 bool carry() const { return ((_value >> 0) & 1) != 0; }
4588
4589 void print() const {
4590 // flags
4591 char f[8];
4592 f[0] = (overflow ()) ? 'O' : '-';
4593 f[1] = (direction ()) ? 'D' : '-';
4594 f[2] = (sign ()) ? 'S' : '-';
4595 f[3] = (zero ()) ? 'Z' : '-';
4596 f[4] = (auxiliary_carry()) ? 'A' : '-';
4597 f[5] = (parity ()) ? 'P' : '-';
4598 f[6] = (carry ()) ? 'C' : '-';
4599 f[7] = '\x0';
4600 // output
4601 printf("%08x flags = %s", _value, f);
4602 }
4603
4604 };
4605
4606 class IU_Register {
4607 public:
4608 int32_t _value;
4609
4610 void print() const {
4611 printf("%08x %11d", _value, _value);
4612 }
4613
4614 };
4615
4616 class IU_State {
4617 public:
4618 Flag_Register _eflags;
4619 IU_Register _rdi;
4620 IU_Register _rsi;
4621 IU_Register _rbp;
4622 IU_Register _rsp;
4623 IU_Register _rbx;
4624 IU_Register _rdx;
4625 IU_Register _rcx;
4626 IU_Register _rax;
4627
4628 void print() const {
4629 // computation registers
4630 printf("rax, = "); _rax.print(); printf("\n");
4631 printf("rbx, = "); _rbx.print(); printf("\n");
4632 printf("rcx = "); _rcx.print(); printf("\n");
4633 printf("rdx = "); _rdx.print(); printf("\n");
4634 printf("rdi = "); _rdi.print(); printf("\n");
4635 printf("rsi = "); _rsi.print(); printf("\n");
4636 printf("rbp, = "); _rbp.print(); printf("\n");
4637 printf("rsp = "); _rsp.print(); printf("\n");
4638 printf("\n");
4639 // control registers
4640 printf("flgs = "); _eflags.print(); printf("\n");
4641 }
4642 };
4643
4644
4645 class CPU_State {
4646 public:
4647 FPU_State _fpu_state;
4648 IU_State _iu_state;
4649
4650 void print() const {
4651 printf("--------------------------------------------------\n");
4652 _iu_state .print();
4653 printf("\n");
4654 _fpu_state.print();
4655 printf("--------------------------------------------------\n");
4656 }
4657
4658 };
4659
4660
4661 static void _print_CPU_state(CPU_State* state) {
4662 state->print();
4663 };
4664
4665
4666 void MacroAssembler::print_CPU_state() {
4667 push_CPU_state();
4668 push(rsp); // pass CPU state
4669 call(RuntimeAddress(CAST_FROM_FN_PTR(address, _print_CPU_state)));
4670 addptr(rsp, wordSize); // discard argument
4671 pop_CPU_state();
4672 }
4673
4674
4675 static bool _verify_FPU(int stack_depth, char* s, CPU_State* state) {
4676 static int counter = 0;
4677 FPU_State* fs = &state->_fpu_state;
4678 counter++;
4679 // For leaf calls, only verify that the top few elements remain empty.
4680 // We only need 1 empty at the top for C2 code.
4681 if( stack_depth < 0 ) {
4682 if( fs->tag_for_st(7) != 3 ) {
4683 printf("FPR7 not empty\n");
4684 state->print();
4685 assert(false, "error");
4686 return false;
4687 }
4688 return true; // All other stack states do not matter
4689 }
4690
4691 assert((fs->_control_word._value & 0xffff) == StubRoutines::_fpu_cntrl_wrd_std,
4692 "bad FPU control word");
4693
4694 // compute stack depth
4695 int i = 0;
4696 while (i < FPU_State::number_of_registers && fs->tag_for_st(i) < 3) i++;
4697 int d = i;
4698 while (i < FPU_State::number_of_registers && fs->tag_for_st(i) == 3) i++;
4699 // verify findings
4700 if (i != FPU_State::number_of_registers) {
4701 // stack not contiguous
4702 printf("%s: stack not contiguous at ST%d\n", s, i);
4703 state->print();
4704 assert(false, "error");
4705 return false;
4706 }
4707 // check if computed stack depth corresponds to expected stack depth
4708 if (stack_depth < 0) {
4709 // expected stack depth is -stack_depth or less
4710 if (d > -stack_depth) {
4711 // too many elements on the stack
4712 printf("%s: <= %d stack elements expected but found %d\n", s, -stack_depth, d);
4713 state->print();
4714 assert(false, "error");
4715 return false;
4716 }
4717 } else {
4718 // expected stack depth is stack_depth
4719 if (d != stack_depth) {
4720 // wrong stack depth
4721 printf("%s: %d stack elements expected but found %d\n", s, stack_depth, d);
4722 state->print();
4723 assert(false, "error");
4724 return false;
4725 }
4726 }
4727 // everything is cool
4728 return true;
4729 }
4730
4731
4732 void MacroAssembler::verify_FPU(int stack_depth, const char* s) {
4733 if (!VerifyFPU) return;
4734 push_CPU_state();
4735 push(rsp); // pass CPU state
4736 ExternalAddress msg((address) s);
4737 // pass message string s
4738 pushptr(msg.addr());
4739 push(stack_depth); // pass stack depth
4740 call(RuntimeAddress(CAST_FROM_FN_PTR(address, _verify_FPU)));
4741 addptr(rsp, 3 * wordSize); // discard arguments
4742 // check for error
4743 { Label L;
4744 testl(rax, rax);
4745 jcc(Assembler::notZero, L);
4746 int3(); // break if error condition
4747 bind(L);
4748 }
4749 pop_CPU_state();
4750 }
4751
4752 void MacroAssembler::load_klass(Register dst, Register src) {
4753 #ifdef _LP64
4754 if (UseCompressedKlassPointers) {
4755 movl(dst, Address(src, oopDesc::klass_offset_in_bytes()));
4756 decode_klass_not_null(dst);
4757 } else
4758 #endif
4759 movptr(dst, Address(src, oopDesc::klass_offset_in_bytes()));
4760 }
4761
4762 void MacroAssembler::load_prototype_header(Register dst, Register src) {
4763 #ifdef _LP64
4764 if (UseCompressedKlassPointers) {
4765 assert (Universe::heap() != NULL, "java heap should be initialized");
4766 movl(dst, Address(src, oopDesc::klass_offset_in_bytes()));
4767 if (Universe::narrow_klass_shift() != 0) {
4768 assert(LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong");
4769 assert(LogKlassAlignmentInBytes == Address::times_8, "klass not aligned on 64bits?");
4770 movq(dst, Address(r12_heapbase, dst, Address::times_8, Klass::prototype_header_offset()));
4771 } else {
4772 movq(dst, Address(dst, Klass::prototype_header_offset()));
4773 }
4774 } else
4775 #endif
4776 {
4777 movptr(dst, Address(src, oopDesc::klass_offset_in_bytes()));
4778 movptr(dst, Address(dst, Klass::prototype_header_offset()));
4779 }
4780 }
4781
4782 void MacroAssembler::store_klass(Register dst, Register src) {
4783 #ifdef _LP64
4784 if (UseCompressedKlassPointers) {
4785 encode_klass_not_null(src);
4786 movl(Address(dst, oopDesc::klass_offset_in_bytes()), src);
4787 } else
4788 #endif
4789 movptr(Address(dst, oopDesc::klass_offset_in_bytes()), src);
4790 }
4791
4792 void MacroAssembler::load_heap_oop(Register dst, Address src) {
4793 #ifdef _LP64
4794 // FIXME: Must change all places where we try to load the klass.
4795 if (UseCompressedOops) {
4796 movl(dst, src);
4797 decode_heap_oop(dst);
4798 } else
4799 #endif
4800 movptr(dst, src);
4801 }
4802
4803 // Doesn't do verfication, generates fixed size code
4804 void MacroAssembler::load_heap_oop_not_null(Register dst, Address src) {
4805 #ifdef _LP64
4806 if (UseCompressedOops) {
4807 movl(dst, src);
4808 decode_heap_oop_not_null(dst);
4809 } else
4810 #endif
4811 movptr(dst, src);
4812 }
4813
4814 void MacroAssembler::store_heap_oop(Address dst, Register src) {
4815 #ifdef _LP64
4816 if (UseCompressedOops) {
4817 assert(!dst.uses(src), "not enough registers");
4818 encode_heap_oop(src);
4819 movl(dst, src);
4820 } else
4821 #endif
4822 movptr(dst, src);
4823 }
4824
4825 void MacroAssembler::cmp_heap_oop(Register src1, Address src2, Register tmp) {
4826 assert_different_registers(src1, tmp);
4827 #ifdef _LP64
4828 if (UseCompressedOops) {
4829 bool did_push = false;
4830 if (tmp == noreg) {
4831 tmp = rax;
4832 push(tmp);
4833 did_push = true;
4834 assert(!src2.uses(rsp), "can't push");
4835 }
4836 load_heap_oop(tmp, src2);
4837 cmpptr(src1, tmp);
4838 if (did_push) pop(tmp);
4839 } else
4840 #endif
4841 cmpptr(src1, src2);
4842 }
4843
4844 // Used for storing NULLs.
4845 void MacroAssembler::store_heap_oop_null(Address dst) {
4846 #ifdef _LP64
4847 if (UseCompressedOops) {
4848 movl(dst, (int32_t)NULL_WORD);
4849 } else {
4850 movslq(dst, (int32_t)NULL_WORD);
4851 }
4852 #else
4853 movl(dst, (int32_t)NULL_WORD);
4854 #endif
4855 }
4856
4857 #ifdef _LP64
4858 void MacroAssembler::store_klass_gap(Register dst, Register src) {
4859 if (UseCompressedKlassPointers) {
4860 // Store to klass gap in destination
4861 movl(Address(dst, oopDesc::klass_gap_offset_in_bytes()), src);
4862 }
4863 }
4864
4865 #ifdef ASSERT
4866 void MacroAssembler::verify_heapbase(const char* msg) {
4867 assert (UseCompressedOops || UseCompressedKlassPointers, "should be compressed");
4868 assert (Universe::heap() != NULL, "java heap should be initialized");
4869 if (CheckCompressedOops) {
4870 Label ok;
4871 push(rscratch1); // cmpptr trashes rscratch1
4872 cmpptr(r12_heapbase, ExternalAddress((address)Universe::narrow_ptrs_base_addr()));
4873 jcc(Assembler::equal, ok);
4874 STOP(msg);
4875 bind(ok);
4876 pop(rscratch1);
4877 }
4878 }
4879 #endif
4880
4881 // Algorithm must match oop.inline.hpp encode_heap_oop.
4882 void MacroAssembler::encode_heap_oop(Register r) {
4883 #ifdef ASSERT
4884 verify_heapbase("MacroAssembler::encode_heap_oop: heap base corrupted?");
4885 #endif
4886 verify_oop(r, "broken oop in encode_heap_oop");
4887 if (Universe::narrow_oop_base() == NULL) {
4888 if (Universe::narrow_oop_shift() != 0) {
4889 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong");
4890 shrq(r, LogMinObjAlignmentInBytes);
4891 }
4892 return;
4893 }
4894 testq(r, r);
4895 cmovq(Assembler::equal, r, r12_heapbase);
4896 subq(r, r12_heapbase);
4897 shrq(r, LogMinObjAlignmentInBytes);
4898 }
4899
4900 void MacroAssembler::encode_heap_oop_not_null(Register r) {
4901 #ifdef ASSERT
4902 verify_heapbase("MacroAssembler::encode_heap_oop_not_null: heap base corrupted?");
4903 if (CheckCompressedOops) {
4904 Label ok;
4905 testq(r, r);
4906 jcc(Assembler::notEqual, ok);
4907 STOP("null oop passed to encode_heap_oop_not_null");
4908 bind(ok);
4909 }
4910 #endif
4911 verify_oop(r, "broken oop in encode_heap_oop_not_null");
4912 if (Universe::narrow_oop_base() != NULL) {
4913 subq(r, r12_heapbase);
4914 }
4915 if (Universe::narrow_oop_shift() != 0) {
4916 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong");
4917 shrq(r, LogMinObjAlignmentInBytes);
4918 }
4919 }
4920
4921 void MacroAssembler::encode_heap_oop_not_null(Register dst, Register src) {
4922 #ifdef ASSERT
4923 verify_heapbase("MacroAssembler::encode_heap_oop_not_null2: heap base corrupted?");
4924 if (CheckCompressedOops) {
4925 Label ok;
4926 testq(src, src);
4927 jcc(Assembler::notEqual, ok);
4928 STOP("null oop passed to encode_heap_oop_not_null2");
4929 bind(ok);
4930 }
4931 #endif
4932 verify_oop(src, "broken oop in encode_heap_oop_not_null2");
4933 if (dst != src) {
4934 movq(dst, src);
4935 }
4936 if (Universe::narrow_oop_base() != NULL) {
4937 subq(dst, r12_heapbase);
4938 }
4939 if (Universe::narrow_oop_shift() != 0) {
4940 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong");
4941 shrq(dst, LogMinObjAlignmentInBytes);
4942 }
4943 }
4944
4945 void MacroAssembler::decode_heap_oop(Register r) {
4946 #ifdef ASSERT
4947 verify_heapbase("MacroAssembler::decode_heap_oop: heap base corrupted?");
4948 #endif
4949 if (Universe::narrow_oop_base() == NULL) {
4950 if (Universe::narrow_oop_shift() != 0) {
4951 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong");
4952 shlq(r, LogMinObjAlignmentInBytes);
4953 }
4954 } else {
4955 Label done;
4956 shlq(r, LogMinObjAlignmentInBytes);
4957 jccb(Assembler::equal, done);
4958 addq(r, r12_heapbase);
4959 bind(done);
4960 }
4961 verify_oop(r, "broken oop in decode_heap_oop");
4962 }
4963
4964 void MacroAssembler::decode_heap_oop_not_null(Register r) {
4965 // Note: it will change flags
4966 assert (UseCompressedOops, "should only be used for compressed headers");
4967 assert (Universe::heap() != NULL, "java heap should be initialized");
4968 // Cannot assert, unverified entry point counts instructions (see .ad file)
4969 // vtableStubs also counts instructions in pd_code_size_limit.
4970 // Also do not verify_oop as this is called by verify_oop.
4971 if (Universe::narrow_oop_shift() != 0) {
4972 assert(LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong");
4973 shlq(r, LogMinObjAlignmentInBytes);
4974 if (Universe::narrow_oop_base() != NULL) {
4975 addq(r, r12_heapbase);
4976 }
4977 } else {
4978 assert (Universe::narrow_oop_base() == NULL, "sanity");
4979 }
4980 }
4981
4982 void MacroAssembler::decode_heap_oop_not_null(Register dst, Register src) {
4983 // Note: it will change flags
4984 assert (UseCompressedOops, "should only be used for compressed headers");
4985 assert (Universe::heap() != NULL, "java heap should be initialized");
4986 // Cannot assert, unverified entry point counts instructions (see .ad file)
4987 // vtableStubs also counts instructions in pd_code_size_limit.
4988 // Also do not verify_oop as this is called by verify_oop.
4989 if (Universe::narrow_oop_shift() != 0) {
4990 assert(LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong");
4991 if (LogMinObjAlignmentInBytes == Address::times_8) {
4992 leaq(dst, Address(r12_heapbase, src, Address::times_8, 0));
4993 } else {
4994 if (dst != src) {
4995 movq(dst, src);
4996 }
4997 shlq(dst, LogMinObjAlignmentInBytes);
4998 if (Universe::narrow_oop_base() != NULL) {
4999 addq(dst, r12_heapbase);
5000 }
5001 }
5002 } else {
5003 assert (Universe::narrow_oop_base() == NULL, "sanity");
5004 if (dst != src) {
5005 movq(dst, src);
5006 }
5007 }
5008 }
5009
5010 void MacroAssembler::encode_klass_not_null(Register r) {
5011 assert(Metaspace::is_initialized(), "metaspace should be initialized");
5012 #ifdef ASSERT
5013 verify_heapbase("MacroAssembler::encode_klass_not_null: heap base corrupted?");
5014 #endif
5015 if (Universe::narrow_klass_base() != NULL) {
5016 subq(r, r12_heapbase);
5017 }
5018 if (Universe::narrow_klass_shift() != 0) {
5019 assert (LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong");
5020 shrq(r, LogKlassAlignmentInBytes);
5021 }
5022 }
5023
5024 void MacroAssembler::encode_klass_not_null(Register dst, Register src) {
5025 assert(Metaspace::is_initialized(), "metaspace should be initialized");
5026 #ifdef ASSERT
5027 verify_heapbase("MacroAssembler::encode_klass_not_null2: heap base corrupted?");
5028 #endif
5029 if (dst != src) {
5030 movq(dst, src);
5031 }
5032 if (Universe::narrow_klass_base() != NULL) {
5033 subq(dst, r12_heapbase);
5034 }
5035 if (Universe::narrow_klass_shift() != 0) {
5036 assert (LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong");
5037 shrq(dst, LogKlassAlignmentInBytes);
5038 }
5039 }
5040
5041 void MacroAssembler::decode_klass_not_null(Register r) {
5042 assert(Metaspace::is_initialized(), "metaspace should be initialized");
5043 // Note: it will change flags
5044 assert (UseCompressedKlassPointers, "should only be used for compressed headers");
5045 // Cannot assert, unverified entry point counts instructions (see .ad file)
5046 // vtableStubs also counts instructions in pd_code_size_limit.
5047 // Also do not verify_oop as this is called by verify_oop.
5048 if (Universe::narrow_klass_shift() != 0) {
5049 assert(LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong");
5050 shlq(r, LogKlassAlignmentInBytes);
5051 if (Universe::narrow_klass_base() != NULL) {
5052 addq(r, r12_heapbase);
5053 }
5054 } else {
5055 assert (Universe::narrow_klass_base() == NULL, "sanity");
5056 }
5057 }
5058
5059 void MacroAssembler::decode_klass_not_null(Register dst, Register src) {
5060 assert(Metaspace::is_initialized(), "metaspace should be initialized");
5061 // Note: it will change flags
5062 assert (UseCompressedKlassPointers, "should only be used for compressed headers");
5063 // Cannot assert, unverified entry point counts instructions (see .ad file)
5064 // vtableStubs also counts instructions in pd_code_size_limit.
5065 // Also do not verify_oop as this is called by verify_oop.
5066 if (Universe::narrow_klass_shift() != 0) {
5067 assert(LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong");
5068 assert(LogKlassAlignmentInBytes == Address::times_8, "klass not aligned on 64bits?");
5069 leaq(dst, Address(r12_heapbase, src, Address::times_8, 0));
5070 } else {
5071 assert (Universe::narrow_klass_base() == NULL, "sanity");
5072 if (dst != src) {
5073 movq(dst, src);
5074 }
5075 }
5076 }
5077
5078 void MacroAssembler::set_narrow_oop(Register dst, jobject obj) {
5079 assert (UseCompressedOops, "should only be used for compressed headers");
5080 assert (Universe::heap() != NULL, "java heap should be initialized");
5081 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder");
5082 int oop_index = oop_recorder()->find_index(obj);
5083 RelocationHolder rspec = oop_Relocation::spec(oop_index);
5084 mov_narrow_oop(dst, oop_index, rspec);
5085 }
5086
5087 void MacroAssembler::set_narrow_oop(Address dst, jobject obj) {
5088 assert (UseCompressedOops, "should only be used for compressed headers");
5089 assert (Universe::heap() != NULL, "java heap should be initialized");
5090 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder");
5091 int oop_index = oop_recorder()->find_index(obj);
5092 RelocationHolder rspec = oop_Relocation::spec(oop_index);
5093 mov_narrow_oop(dst, oop_index, rspec);
5094 }
5095
5096 void MacroAssembler::set_narrow_klass(Register dst, Klass* k) {
5097 assert (UseCompressedKlassPointers, "should only be used for compressed headers");
5098 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder");
5099 int klass_index = oop_recorder()->find_index(k);
5100 RelocationHolder rspec = metadata_Relocation::spec(klass_index);
5101 mov_narrow_oop(dst, oopDesc::encode_klass(k), rspec);
5102 }
5103
5104 void MacroAssembler::set_narrow_klass(Address dst, Klass* k) {
5105 assert (UseCompressedKlassPointers, "should only be used for compressed headers");
5106 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder");
5107 int klass_index = oop_recorder()->find_index(k);
5108 RelocationHolder rspec = metadata_Relocation::spec(klass_index);
5109 mov_narrow_oop(dst, oopDesc::encode_klass(k), rspec);
5110 }
5111
5112 void MacroAssembler::cmp_narrow_oop(Register dst, jobject obj) {
5113 assert (UseCompressedOops, "should only be used for compressed headers");
5114 assert (Universe::heap() != NULL, "java heap should be initialized");
5115 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder");
5116 int oop_index = oop_recorder()->find_index(obj);
5117 RelocationHolder rspec = oop_Relocation::spec(oop_index);
5118 Assembler::cmp_narrow_oop(dst, oop_index, rspec);
5119 }
5120
5121 void MacroAssembler::cmp_narrow_oop(Address dst, jobject obj) {
5122 assert (UseCompressedOops, "should only be used for compressed headers");
5123 assert (Universe::heap() != NULL, "java heap should be initialized");
5124 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder");
5125 int oop_index = oop_recorder()->find_index(obj);
5126 RelocationHolder rspec = oop_Relocation::spec(oop_index);
5127 Assembler::cmp_narrow_oop(dst, oop_index, rspec);
5128 }
5129
5130 void MacroAssembler::cmp_narrow_klass(Register dst, Klass* k) {
5131 assert (UseCompressedKlassPointers, "should only be used for compressed headers");
5132 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder");
5133 int klass_index = oop_recorder()->find_index(k);
5134 RelocationHolder rspec = metadata_Relocation::spec(klass_index);
5135 Assembler::cmp_narrow_oop(dst, oopDesc::encode_klass(k), rspec);
5136 }
5137
5138 void MacroAssembler::cmp_narrow_klass(Address dst, Klass* k) {
5139 assert (UseCompressedKlassPointers, "should only be used for compressed headers");
5140 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder");
5141 int klass_index = oop_recorder()->find_index(k);
5142 RelocationHolder rspec = metadata_Relocation::spec(klass_index);
5143 Assembler::cmp_narrow_oop(dst, oopDesc::encode_klass(k), rspec);
5144 }
5145
5146 void MacroAssembler::reinit_heapbase() {
5147 if (UseCompressedOops || UseCompressedKlassPointers) {
5148 movptr(r12_heapbase, ExternalAddress((address)Universe::narrow_ptrs_base_addr()));
5149 }
5150 }
5151 #endif // _LP64
5152
5153
5154 // C2 compiled method's prolog code.
5155 void MacroAssembler::verified_entry(int framesize, bool stack_bang, bool fp_mode_24b) {
5156
5157 // WARNING: Initial instruction MUST be 5 bytes or longer so that
5158 // NativeJump::patch_verified_entry will be able to patch out the entry
5159 // code safely. The push to verify stack depth is ok at 5 bytes,
5160 // the frame allocation can be either 3 or 6 bytes. So if we don't do
5161 // stack bang then we must use the 6 byte frame allocation even if
5162 // we have no frame. :-(
5163
5164 assert((framesize & (StackAlignmentInBytes-1)) == 0, "frame size not aligned");
5165 // Remove word for return addr
5166 framesize -= wordSize;
5167
5168 // Calls to C2R adapters often do not accept exceptional returns.
5169 // We require that their callers must bang for them. But be careful, because
5170 // some VM calls (such as call site linkage) can use several kilobytes of
5171 // stack. But the stack safety zone should account for that.
5172 // See bugs 4446381, 4468289, 4497237.
5173 if (stack_bang) {
5174 generate_stack_overflow_check(framesize);
5175
5176 // We always push rbp, so that on return to interpreter rbp, will be
5177 // restored correctly and we can correct the stack.
5178 push(rbp);
5179 // Remove word for ebp
5180 framesize -= wordSize;
5181
5182 // Create frame
5183 if (framesize) {
5184 subptr(rsp, framesize);
5185 }
5186 } else {
5187 // Create frame (force generation of a 4 byte immediate value)
5188 subptr_imm32(rsp, framesize);
5189
5190 // Save RBP register now.
5191 framesize -= wordSize;
5192 movptr(Address(rsp, framesize), rbp);
5193 }
5194
5195 if (VerifyStackAtCalls) { // Majik cookie to verify stack depth
5196 framesize -= wordSize;
5197 movptr(Address(rsp, framesize), (int32_t)0xbadb100d);
5198 }
5199
5200 #ifndef _LP64
5201 // If method sets FPU control word do it now
5202 if (fp_mode_24b) {
5203 fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_24()));
5204 }
5205 if (UseSSE >= 2 && VerifyFPU) {
5206 verify_FPU(0, "FPU stack must be clean on entry");
5207 }
5208 #endif
5209
5210 #ifdef ASSERT
5211 if (VerifyStackAtCalls) {
5212 Label L;
5213 push(rax);
5214 mov(rax, rsp);
5215 andptr(rax, StackAlignmentInBytes-1);
5216 cmpptr(rax, StackAlignmentInBytes-wordSize);
5217 pop(rax);
5218 jcc(Assembler::equal, L);
5219 STOP("Stack is not properly aligned!");
5220 bind(L);
5221 }
5222 #endif
5223
5224 }
5225
5226
5227 // IndexOf for constant substrings with size >= 8 chars
5228 // which don't need to be loaded through stack.
5229 void MacroAssembler::string_indexofC8(Register str1, Register str2,
5230 Register cnt1, Register cnt2,
5231 int int_cnt2, Register result,
5232 XMMRegister vec, Register tmp) {
5233 ShortBranchVerifier sbv(this);
5234 assert(UseSSE42Intrinsics, "SSE4.2 is required");
5235
5236 // This method uses pcmpestri inxtruction with bound registers
5237 // inputs:
5238 // xmm - substring
5239 // rax - substring length (elements count)
5240 // mem - scanned string
5241 // rdx - string length (elements count)
5242 // 0xd - mode: 1100 (substring search) + 01 (unsigned shorts)
5243 // outputs:
5244 // rcx - matched index in string
5245 assert(cnt1 == rdx && cnt2 == rax && tmp == rcx, "pcmpestri");
5246
5247 Label RELOAD_SUBSTR, SCAN_TO_SUBSTR, SCAN_SUBSTR,
5248 RET_FOUND, RET_NOT_FOUND, EXIT, FOUND_SUBSTR,
5249 MATCH_SUBSTR_HEAD, RELOAD_STR, FOUND_CANDIDATE;
5250
5251 // Note, inline_string_indexOf() generates checks:
5252 // if (substr.count > string.count) return -1;
5253 // if (substr.count == 0) return 0;
5254 assert(int_cnt2 >= 8, "this code isused only for cnt2 >= 8 chars");
5255
5256 // Load substring.
5257 movdqu(vec, Address(str2, 0));
5258 movl(cnt2, int_cnt2);
5259 movptr(result, str1); // string addr
5260
5261 if (int_cnt2 > 8) {
5262 jmpb(SCAN_TO_SUBSTR);
5263
5264 // Reload substr for rescan, this code
5265 // is executed only for large substrings (> 8 chars)
5266 bind(RELOAD_SUBSTR);
5267 movdqu(vec, Address(str2, 0));
5268 negptr(cnt2); // Jumped here with negative cnt2, convert to positive
5269
5270 bind(RELOAD_STR);
5271 // We came here after the beginning of the substring was
5272 // matched but the rest of it was not so we need to search
5273 // again. Start from the next element after the previous match.
5274
5275 // cnt2 is number of substring reminding elements and
5276 // cnt1 is number of string reminding elements when cmp failed.
5277 // Restored cnt1 = cnt1 - cnt2 + int_cnt2
5278 subl(cnt1, cnt2);
5279 addl(cnt1, int_cnt2);
5280 movl(cnt2, int_cnt2); // Now restore cnt2
5281
5282 decrementl(cnt1); // Shift to next element
5283 cmpl(cnt1, cnt2);
5284 jccb(Assembler::negative, RET_NOT_FOUND); // Left less then substring
5285
5286 addptr(result, 2);
5287
5288 } // (int_cnt2 > 8)
5289
5290 // Scan string for start of substr in 16-byte vectors
5291 bind(SCAN_TO_SUBSTR);
5292 pcmpestri(vec, Address(result, 0), 0x0d);
5293 jccb(Assembler::below, FOUND_CANDIDATE); // CF == 1
5294 subl(cnt1, 8);
5295 jccb(Assembler::lessEqual, RET_NOT_FOUND); // Scanned full string
5296 cmpl(cnt1, cnt2);
5297 jccb(Assembler::negative, RET_NOT_FOUND); // Left less then substring
5298 addptr(result, 16);
5299 jmpb(SCAN_TO_SUBSTR);
5300
5301 // Found a potential substr
5302 bind(FOUND_CANDIDATE);
5303 // Matched whole vector if first element matched (tmp(rcx) == 0).
5304 if (int_cnt2 == 8) {
5305 jccb(Assembler::overflow, RET_FOUND); // OF == 1
5306 } else { // int_cnt2 > 8
5307 jccb(Assembler::overflow, FOUND_SUBSTR);
5308 }
5309 // After pcmpestri tmp(rcx) contains matched element index
5310 // Compute start addr of substr
5311 lea(result, Address(result, tmp, Address::times_2));
5312
5313 // Make sure string is still long enough
5314 subl(cnt1, tmp);
5315 cmpl(cnt1, cnt2);
5316 if (int_cnt2 == 8) {
5317 jccb(Assembler::greaterEqual, SCAN_TO_SUBSTR);
5318 } else { // int_cnt2 > 8
5319 jccb(Assembler::greaterEqual, MATCH_SUBSTR_HEAD);
5320 }
5321 // Left less then substring.
5322
5323 bind(RET_NOT_FOUND);
5324 movl(result, -1);
5325 jmpb(EXIT);
5326
5327 if (int_cnt2 > 8) {
5328 // This code is optimized for the case when whole substring
5329 // is matched if its head is matched.
5330 bind(MATCH_SUBSTR_HEAD);
5331 pcmpestri(vec, Address(result, 0), 0x0d);
5332 // Reload only string if does not match
5333 jccb(Assembler::noOverflow, RELOAD_STR); // OF == 0
5334
5335 Label CONT_SCAN_SUBSTR;
5336 // Compare the rest of substring (> 8 chars).
5337 bind(FOUND_SUBSTR);
5338 // First 8 chars are already matched.
5339 negptr(cnt2);
5340 addptr(cnt2, 8);
5341
5342 bind(SCAN_SUBSTR);
5343 subl(cnt1, 8);
5344 cmpl(cnt2, -8); // Do not read beyond substring
5345 jccb(Assembler::lessEqual, CONT_SCAN_SUBSTR);
5346 // Back-up strings to avoid reading beyond substring:
5347 // cnt1 = cnt1 - cnt2 + 8
5348 addl(cnt1, cnt2); // cnt2 is negative
5349 addl(cnt1, 8);
5350 movl(cnt2, 8); negptr(cnt2);
5351 bind(CONT_SCAN_SUBSTR);
5352 if (int_cnt2 < (int)G) {
5353 movdqu(vec, Address(str2, cnt2, Address::times_2, int_cnt2*2));
5354 pcmpestri(vec, Address(result, cnt2, Address::times_2, int_cnt2*2), 0x0d);
5355 } else {
5356 // calculate index in register to avoid integer overflow (int_cnt2*2)
5357 movl(tmp, int_cnt2);
5358 addptr(tmp, cnt2);
5359 movdqu(vec, Address(str2, tmp, Address::times_2, 0));
5360 pcmpestri(vec, Address(result, tmp, Address::times_2, 0), 0x0d);
5361 }
5362 // Need to reload strings pointers if not matched whole vector
5363 jcc(Assembler::noOverflow, RELOAD_SUBSTR); // OF == 0
5364 addptr(cnt2, 8);
5365 jcc(Assembler::negative, SCAN_SUBSTR);
5366 // Fall through if found full substring
5367
5368 } // (int_cnt2 > 8)
5369
5370 bind(RET_FOUND);
5371 // Found result if we matched full small substring.
5372 // Compute substr offset
5373 subptr(result, str1);
5374 shrl(result, 1); // index
5375 bind(EXIT);
5376
5377 } // string_indexofC8
5378
5379 // Small strings are loaded through stack if they cross page boundary.
5380 void MacroAssembler::string_indexof(Register str1, Register str2,
5381 Register cnt1, Register cnt2,
5382 int int_cnt2, Register result,
5383 XMMRegister vec, Register tmp) {
5384 ShortBranchVerifier sbv(this);
5385 assert(UseSSE42Intrinsics, "SSE4.2 is required");
5386 //
5387 // int_cnt2 is length of small (< 8 chars) constant substring
5388 // or (-1) for non constant substring in which case its length
5389 // is in cnt2 register.
5390 //
5391 // Note, inline_string_indexOf() generates checks:
5392 // if (substr.count > string.count) return -1;
5393 // if (substr.count == 0) return 0;
5394 //
5395 assert(int_cnt2 == -1 || (0 < int_cnt2 && int_cnt2 < 8), "should be != 0");
5396
5397 // This method uses pcmpestri inxtruction with bound registers
5398 // inputs:
5399 // xmm - substring
5400 // rax - substring length (elements count)
5401 // mem - scanned string
5402 // rdx - string length (elements count)
5403 // 0xd - mode: 1100 (substring search) + 01 (unsigned shorts)
5404 // outputs:
5405 // rcx - matched index in string
5406 assert(cnt1 == rdx && cnt2 == rax && tmp == rcx, "pcmpestri");
5407
5408 Label RELOAD_SUBSTR, SCAN_TO_SUBSTR, SCAN_SUBSTR, ADJUST_STR,
5409 RET_FOUND, RET_NOT_FOUND, CLEANUP, FOUND_SUBSTR,
5410 FOUND_CANDIDATE;
5411
5412 { //========================================================
5413 // We don't know where these strings are located
5414 // and we can't read beyond them. Load them through stack.
5415 Label BIG_STRINGS, CHECK_STR, COPY_SUBSTR, COPY_STR;
5416
5417 movptr(tmp, rsp); // save old SP
5418
5419 if (int_cnt2 > 0) { // small (< 8 chars) constant substring
5420 if (int_cnt2 == 1) { // One char
5421 load_unsigned_short(result, Address(str2, 0));
5422 movdl(vec, result); // move 32 bits
5423 } else if (int_cnt2 == 2) { // Two chars
5424 movdl(vec, Address(str2, 0)); // move 32 bits
5425 } else if (int_cnt2 == 4) { // Four chars
5426 movq(vec, Address(str2, 0)); // move 64 bits
5427 } else { // cnt2 = { 3, 5, 6, 7 }
5428 // Array header size is 12 bytes in 32-bit VM
5429 // + 6 bytes for 3 chars == 18 bytes,
5430 // enough space to load vec and shift.
5431 assert(HeapWordSize*TypeArrayKlass::header_size() >= 12,"sanity");
5432 movdqu(vec, Address(str2, (int_cnt2*2)-16));
5433 psrldq(vec, 16-(int_cnt2*2));
5434 }
5435 } else { // not constant substring
5436 cmpl(cnt2, 8);
5437 jccb(Assembler::aboveEqual, BIG_STRINGS); // Both strings are big enough
5438
5439 // We can read beyond string if srt+16 does not cross page boundary
5440 // since heaps are aligned and mapped by pages.
5441 assert(os::vm_page_size() < (int)G, "default page should be small");
5442 movl(result, str2); // We need only low 32 bits
5443 andl(result, (os::vm_page_size()-1));
5444 cmpl(result, (os::vm_page_size()-16));
5445 jccb(Assembler::belowEqual, CHECK_STR);
5446
5447 // Move small strings to stack to allow load 16 bytes into vec.
5448 subptr(rsp, 16);
5449 int stk_offset = wordSize-2;
5450 push(cnt2);
5451
5452 bind(COPY_SUBSTR);
5453 load_unsigned_short(result, Address(str2, cnt2, Address::times_2, -2));
5454 movw(Address(rsp, cnt2, Address::times_2, stk_offset), result);
5455 decrement(cnt2);
5456 jccb(Assembler::notZero, COPY_SUBSTR);
5457
5458 pop(cnt2);
5459 movptr(str2, rsp); // New substring address
5460 } // non constant
5461
5462 bind(CHECK_STR);
5463 cmpl(cnt1, 8);
5464 jccb(Assembler::aboveEqual, BIG_STRINGS);
5465
5466 // Check cross page boundary.
5467 movl(result, str1); // We need only low 32 bits
5468 andl(result, (os::vm_page_size()-1));
5469 cmpl(result, (os::vm_page_size()-16));
5470 jccb(Assembler::belowEqual, BIG_STRINGS);
5471
5472 subptr(rsp, 16);
5473 int stk_offset = -2;
5474 if (int_cnt2 < 0) { // not constant
5475 push(cnt2);
5476 stk_offset += wordSize;
5477 }
5478 movl(cnt2, cnt1);
5479
5480 bind(COPY_STR);
5481 load_unsigned_short(result, Address(str1, cnt2, Address::times_2, -2));
5482 movw(Address(rsp, cnt2, Address::times_2, stk_offset), result);
5483 decrement(cnt2);
5484 jccb(Assembler::notZero, COPY_STR);
5485
5486 if (int_cnt2 < 0) { // not constant
5487 pop(cnt2);
5488 }
5489 movptr(str1, rsp); // New string address
5490
5491 bind(BIG_STRINGS);
5492 // Load substring.
5493 if (int_cnt2 < 0) { // -1
5494 movdqu(vec, Address(str2, 0));
5495 push(cnt2); // substr count
5496 push(str2); // substr addr
5497 push(str1); // string addr
5498 } else {
5499 // Small (< 8 chars) constant substrings are loaded already.
5500 movl(cnt2, int_cnt2);
5501 }
5502 push(tmp); // original SP
5503
5504 } // Finished loading
5505
5506 //========================================================
5507 // Start search
5508 //
5509
5510 movptr(result, str1); // string addr
5511
5512 if (int_cnt2 < 0) { // Only for non constant substring
5513 jmpb(SCAN_TO_SUBSTR);
5514
5515 // SP saved at sp+0
5516 // String saved at sp+1*wordSize
5517 // Substr saved at sp+2*wordSize
5518 // Substr count saved at sp+3*wordSize
5519
5520 // Reload substr for rescan, this code
5521 // is executed only for large substrings (> 8 chars)
5522 bind(RELOAD_SUBSTR);
5523 movptr(str2, Address(rsp, 2*wordSize));
5524 movl(cnt2, Address(rsp, 3*wordSize));
5525 movdqu(vec, Address(str2, 0));
5526 // We came here after the beginning of the substring was
5527 // matched but the rest of it was not so we need to search
5528 // again. Start from the next element after the previous match.
5529 subptr(str1, result); // Restore counter
5530 shrl(str1, 1);
5531 addl(cnt1, str1);
5532 decrementl(cnt1); // Shift to next element
5533 cmpl(cnt1, cnt2);
5534 jccb(Assembler::negative, RET_NOT_FOUND); // Left less then substring
5535
5536 addptr(result, 2);
5537 } // non constant
5538
5539 // Scan string for start of substr in 16-byte vectors
5540 bind(SCAN_TO_SUBSTR);
5541 assert(cnt1 == rdx && cnt2 == rax && tmp == rcx, "pcmpestri");
5542 pcmpestri(vec, Address(result, 0), 0x0d);
5543 jccb(Assembler::below, FOUND_CANDIDATE); // CF == 1
5544 subl(cnt1, 8);
5545 jccb(Assembler::lessEqual, RET_NOT_FOUND); // Scanned full string
5546 cmpl(cnt1, cnt2);
5547 jccb(Assembler::negative, RET_NOT_FOUND); // Left less then substring
5548 addptr(result, 16);
5549
5550 bind(ADJUST_STR);
5551 cmpl(cnt1, 8); // Do not read beyond string
5552 jccb(Assembler::greaterEqual, SCAN_TO_SUBSTR);
5553 // Back-up string to avoid reading beyond string.
5554 lea(result, Address(result, cnt1, Address::times_2, -16));
5555 movl(cnt1, 8);
5556 jmpb(SCAN_TO_SUBSTR);
5557
5558 // Found a potential substr
5559 bind(FOUND_CANDIDATE);
5560 // After pcmpestri tmp(rcx) contains matched element index
5561
5562 // Make sure string is still long enough
5563 subl(cnt1, tmp);
5564 cmpl(cnt1, cnt2);
5565 jccb(Assembler::greaterEqual, FOUND_SUBSTR);
5566 // Left less then substring.
5567
5568 bind(RET_NOT_FOUND);
5569 movl(result, -1);
5570 jmpb(CLEANUP);
5571
5572 bind(FOUND_SUBSTR);
5573 // Compute start addr of substr
5574 lea(result, Address(result, tmp, Address::times_2));
5575
5576 if (int_cnt2 > 0) { // Constant substring
5577 // Repeat search for small substring (< 8 chars)
5578 // from new point without reloading substring.
5579 // Have to check that we don't read beyond string.
5580 cmpl(tmp, 8-int_cnt2);
5581 jccb(Assembler::greater, ADJUST_STR);
5582 // Fall through if matched whole substring.
5583 } else { // non constant
5584 assert(int_cnt2 == -1, "should be != 0");
5585
5586 addl(tmp, cnt2);
5587 // Found result if we matched whole substring.
5588 cmpl(tmp, 8);
5589 jccb(Assembler::lessEqual, RET_FOUND);
5590
5591 // Repeat search for small substring (<= 8 chars)
5592 // from new point 'str1' without reloading substring.
5593 cmpl(cnt2, 8);
5594 // Have to check that we don't read beyond string.
5595 jccb(Assembler::lessEqual, ADJUST_STR);
5596
5597 Label CHECK_NEXT, CONT_SCAN_SUBSTR, RET_FOUND_LONG;
5598 // Compare the rest of substring (> 8 chars).
5599 movptr(str1, result);
5600
5601 cmpl(tmp, cnt2);
5602 // First 8 chars are already matched.
5603 jccb(Assembler::equal, CHECK_NEXT);
5604
5605 bind(SCAN_SUBSTR);
5606 pcmpestri(vec, Address(str1, 0), 0x0d);
5607 // Need to reload strings pointers if not matched whole vector
5608 jcc(Assembler::noOverflow, RELOAD_SUBSTR); // OF == 0
5609
5610 bind(CHECK_NEXT);
5611 subl(cnt2, 8);
5612 jccb(Assembler::lessEqual, RET_FOUND_LONG); // Found full substring
5613 addptr(str1, 16);
5614 addptr(str2, 16);
5615 subl(cnt1, 8);
5616 cmpl(cnt2, 8); // Do not read beyond substring
5617 jccb(Assembler::greaterEqual, CONT_SCAN_SUBSTR);
5618 // Back-up strings to avoid reading beyond substring.
5619 lea(str2, Address(str2, cnt2, Address::times_2, -16));
5620 lea(str1, Address(str1, cnt2, Address::times_2, -16));
5621 subl(cnt1, cnt2);
5622 movl(cnt2, 8);
5623 addl(cnt1, 8);
5624 bind(CONT_SCAN_SUBSTR);
5625 movdqu(vec, Address(str2, 0));
5626 jmpb(SCAN_SUBSTR);
5627
5628 bind(RET_FOUND_LONG);
5629 movptr(str1, Address(rsp, wordSize));
5630 } // non constant
5631
5632 bind(RET_FOUND);
5633 // Compute substr offset
5634 subptr(result, str1);
5635 shrl(result, 1); // index
5636
5637 bind(CLEANUP);
5638 pop(rsp); // restore SP
5639
5640 } // string_indexof
5641
5642 // Compare strings.
5643 void MacroAssembler::string_compare(Register str1, Register str2,
5644 Register cnt1, Register cnt2, Register result,
5645 XMMRegister vec1) {
5646 ShortBranchVerifier sbv(this);
5647 Label LENGTH_DIFF_LABEL, POP_LABEL, DONE_LABEL, WHILE_HEAD_LABEL;
5648
5649 // Compute the minimum of the string lengths and the
5650 // difference of the string lengths (stack).
5651 // Do the conditional move stuff
5652 movl(result, cnt1);
5653 subl(cnt1, cnt2);
5654 push(cnt1);
5655 cmov32(Assembler::lessEqual, cnt2, result);
5656
5657 // Is the minimum length zero?
5658 testl(cnt2, cnt2);
5659 jcc(Assembler::zero, LENGTH_DIFF_LABEL);
5660
5661 // Load first characters
5662 load_unsigned_short(result, Address(str1, 0));
5663 load_unsigned_short(cnt1, Address(str2, 0));
5664
5665 // Compare first characters
5666 subl(result, cnt1);
5667 jcc(Assembler::notZero, POP_LABEL);
5668 decrementl(cnt2);
5669 jcc(Assembler::zero, LENGTH_DIFF_LABEL);
5670
5671 {
5672 // Check after comparing first character to see if strings are equivalent
5673 Label LSkip2;
5674 // Check if the strings start at same location
5675 cmpptr(str1, str2);
5676 jccb(Assembler::notEqual, LSkip2);
5677
5678 // Check if the length difference is zero (from stack)
5679 cmpl(Address(rsp, 0), 0x0);
5680 jcc(Assembler::equal, LENGTH_DIFF_LABEL);
5681
5682 // Strings might not be equivalent
5683 bind(LSkip2);
5684 }
5685
5686 Address::ScaleFactor scale = Address::times_2;
5687 int stride = 8;
5688
5689 // Advance to next element
5690 addptr(str1, 16/stride);
5691 addptr(str2, 16/stride);
5692
5693 if (UseSSE42Intrinsics) {
5694 Label COMPARE_WIDE_VECTORS, VECTOR_NOT_EQUAL, COMPARE_TAIL;
5695 int pcmpmask = 0x19;
5696 // Setup to compare 16-byte vectors
5697 movl(result, cnt2);
5698 andl(cnt2, ~(stride - 1)); // cnt2 holds the vector count
5699 jccb(Assembler::zero, COMPARE_TAIL);
5700
5701 lea(str1, Address(str1, result, scale));
5702 lea(str2, Address(str2, result, scale));
5703 negptr(result);
5704
5705 // pcmpestri
5706 // inputs:
5707 // vec1- substring
5708 // rax - negative string length (elements count)
5709 // mem - scaned string
5710 // rdx - string length (elements count)
5711 // pcmpmask - cmp mode: 11000 (string compare with negated result)
5712 // + 00 (unsigned bytes) or + 01 (unsigned shorts)
5713 // outputs:
5714 // rcx - first mismatched element index
5715 assert(result == rax && cnt2 == rdx && cnt1 == rcx, "pcmpestri");
5716
5717 bind(COMPARE_WIDE_VECTORS);
5718 movdqu(vec1, Address(str1, result, scale));
5719 pcmpestri(vec1, Address(str2, result, scale), pcmpmask);
5720 // After pcmpestri cnt1(rcx) contains mismatched element index
5721
5722 jccb(Assembler::below, VECTOR_NOT_EQUAL); // CF==1
5723 addptr(result, stride);
5724 subptr(cnt2, stride);
5725 jccb(Assembler::notZero, COMPARE_WIDE_VECTORS);
5726
5727 // compare wide vectors tail
5728 testl(result, result);
5729 jccb(Assembler::zero, LENGTH_DIFF_LABEL);
5730
5731 movl(cnt2, stride);
5732 movl(result, stride);
5733 negptr(result);
5734 movdqu(vec1, Address(str1, result, scale));
5735 pcmpestri(vec1, Address(str2, result, scale), pcmpmask);
5736 jccb(Assembler::aboveEqual, LENGTH_DIFF_LABEL);
5737
5738 // Mismatched characters in the vectors
5739 bind(VECTOR_NOT_EQUAL);
5740 addptr(result, cnt1);
5741 movptr(cnt2, result);
5742 load_unsigned_short(result, Address(str1, cnt2, scale));
5743 load_unsigned_short(cnt1, Address(str2, cnt2, scale));
5744 subl(result, cnt1);
5745 jmpb(POP_LABEL);
5746
5747 bind(COMPARE_TAIL); // limit is zero
5748 movl(cnt2, result);
5749 // Fallthru to tail compare
5750 }
5751
5752 // Shift str2 and str1 to the end of the arrays, negate min
5753 lea(str1, Address(str1, cnt2, scale, 0));
5754 lea(str2, Address(str2, cnt2, scale, 0));
5755 negptr(cnt2);
5756
5757 // Compare the rest of the elements
5758 bind(WHILE_HEAD_LABEL);
5759 load_unsigned_short(result, Address(str1, cnt2, scale, 0));
5760 load_unsigned_short(cnt1, Address(str2, cnt2, scale, 0));
5761 subl(result, cnt1);
5762 jccb(Assembler::notZero, POP_LABEL);
5763 increment(cnt2);
5764 jccb(Assembler::notZero, WHILE_HEAD_LABEL);
5765
5766 // Strings are equal up to min length. Return the length difference.
5767 bind(LENGTH_DIFF_LABEL);
5768 pop(result);
5769 jmpb(DONE_LABEL);
5770
5771 // Discard the stored length difference
5772 bind(POP_LABEL);
5773 pop(cnt1);
5774
5775 // That's it
5776 bind(DONE_LABEL);
5777 }
5778
5779 // Compare char[] arrays aligned to 4 bytes or substrings.
5780 void MacroAssembler::char_arrays_equals(bool is_array_equ, Register ary1, Register ary2,
5781 Register limit, Register result, Register chr,
5782 XMMRegister vec1, XMMRegister vec2) {
5783 ShortBranchVerifier sbv(this);
5784 Label TRUE_LABEL, FALSE_LABEL, DONE, COMPARE_VECTORS, COMPARE_CHAR;
5785
5786 int length_offset = arrayOopDesc::length_offset_in_bytes();
5787 int base_offset = arrayOopDesc::base_offset_in_bytes(T_CHAR);
5788
5789 // Check the input args
5790 cmpptr(ary1, ary2);
5791 jcc(Assembler::equal, TRUE_LABEL);
5792
5793 if (is_array_equ) {
5794 // Need additional checks for arrays_equals.
5795 testptr(ary1, ary1);
5796 jcc(Assembler::zero, FALSE_LABEL);
5797 testptr(ary2, ary2);
5798 jcc(Assembler::zero, FALSE_LABEL);
5799
5800 // Check the lengths
5801 movl(limit, Address(ary1, length_offset));
5802 cmpl(limit, Address(ary2, length_offset));
5803 jcc(Assembler::notEqual, FALSE_LABEL);
5804 }
5805
5806 // count == 0
5807 testl(limit, limit);
5808 jcc(Assembler::zero, TRUE_LABEL);
5809
5810 if (is_array_equ) {
5811 // Load array address
5812 lea(ary1, Address(ary1, base_offset));
5813 lea(ary2, Address(ary2, base_offset));
5814 }
5815
5816 shll(limit, 1); // byte count != 0
5817 movl(result, limit); // copy
5818
5819 if (UseSSE42Intrinsics) {
5820 // With SSE4.2, use double quad vector compare
5821 Label COMPARE_WIDE_VECTORS, COMPARE_TAIL;
5822
5823 // Compare 16-byte vectors
5824 andl(result, 0x0000000e); // tail count (in bytes)
5825 andl(limit, 0xfffffff0); // vector count (in bytes)
5826 jccb(Assembler::zero, COMPARE_TAIL);
5827
5828 lea(ary1, Address(ary1, limit, Address::times_1));
5829 lea(ary2, Address(ary2, limit, Address::times_1));
5830 negptr(limit);
5831
5832 bind(COMPARE_WIDE_VECTORS);
5833 movdqu(vec1, Address(ary1, limit, Address::times_1));
5834 movdqu(vec2, Address(ary2, limit, Address::times_1));
5835 pxor(vec1, vec2);
5836
5837 ptest(vec1, vec1);
5838 jccb(Assembler::notZero, FALSE_LABEL);
5839 addptr(limit, 16);
5840 jcc(Assembler::notZero, COMPARE_WIDE_VECTORS);
5841
5842 testl(result, result);
5843 jccb(Assembler::zero, TRUE_LABEL);
5844
5845 movdqu(vec1, Address(ary1, result, Address::times_1, -16));
5846 movdqu(vec2, Address(ary2, result, Address::times_1, -16));
5847 pxor(vec1, vec2);
5848
5849 ptest(vec1, vec1);
5850 jccb(Assembler::notZero, FALSE_LABEL);
5851 jmpb(TRUE_LABEL);
5852
5853 bind(COMPARE_TAIL); // limit is zero
5854 movl(limit, result);
5855 // Fallthru to tail compare
5856 }
5857
5858 // Compare 4-byte vectors
5859 andl(limit, 0xfffffffc); // vector count (in bytes)
5860 jccb(Assembler::zero, COMPARE_CHAR);
5861
5862 lea(ary1, Address(ary1, limit, Address::times_1));
5863 lea(ary2, Address(ary2, limit, Address::times_1));
5864 negptr(limit);
5865
5866 bind(COMPARE_VECTORS);
5867 movl(chr, Address(ary1, limit, Address::times_1));
5868 cmpl(chr, Address(ary2, limit, Address::times_1));
5869 jccb(Assembler::notEqual, FALSE_LABEL);
5870 addptr(limit, 4);
5871 jcc(Assembler::notZero, COMPARE_VECTORS);
5872
5873 // Compare trailing char (final 2 bytes), if any
5874 bind(COMPARE_CHAR);
5875 testl(result, 0x2); // tail char
5876 jccb(Assembler::zero, TRUE_LABEL);
5877 load_unsigned_short(chr, Address(ary1, 0));
5878 load_unsigned_short(limit, Address(ary2, 0));
5879 cmpl(chr, limit);
5880 jccb(Assembler::notEqual, FALSE_LABEL);
5881
5882 bind(TRUE_LABEL);
5883 movl(result, 1); // return true
5884 jmpb(DONE);
5885
5886 bind(FALSE_LABEL);
5887 xorl(result, result); // return false
5888
5889 // That's it
5890 bind(DONE);
5891 }
5892
5893 void MacroAssembler::generate_fill(BasicType t, bool aligned,
5894 Register to, Register value, Register count,
5895 Register rtmp, XMMRegister xtmp) {
5896 ShortBranchVerifier sbv(this);
5897 assert_different_registers(to, value, count, rtmp);
5898 Label L_exit, L_skip_align1, L_skip_align2, L_fill_byte;
5899 Label L_fill_2_bytes, L_fill_4_bytes;
5900
5901 int shift = -1;
5902 switch (t) {
5903 case T_BYTE:
5904 shift = 2;
5905 break;
5906 case T_SHORT:
5907 shift = 1;
5908 break;
5909 case T_INT:
5910 shift = 0;
5911 break;
5912 default: ShouldNotReachHere();
5913 }
5914
5915 if (t == T_BYTE) {
5916 andl(value, 0xff);
5917 movl(rtmp, value);
5918 shll(rtmp, 8);
5919 orl(value, rtmp);
5920 }
5921 if (t == T_SHORT) {
5922 andl(value, 0xffff);
5923 }
5924 if (t == T_BYTE || t == T_SHORT) {
5925 movl(rtmp, value);
5926 shll(rtmp, 16);
5927 orl(value, rtmp);
5928 }
5929
5930 cmpl(count, 2<<shift); // Short arrays (< 8 bytes) fill by element
5931 jcc(Assembler::below, L_fill_4_bytes); // use unsigned cmp
5932 if (!UseUnalignedLoadStores && !aligned && (t == T_BYTE || t == T_SHORT)) {
5933 // align source address at 4 bytes address boundary
5934 if (t == T_BYTE) {
5935 // One byte misalignment happens only for byte arrays
5936 testptr(to, 1);
5937 jccb(Assembler::zero, L_skip_align1);
5938 movb(Address(to, 0), value);
5939 increment(to);
5940 decrement(count);
5941 BIND(L_skip_align1);
5942 }
5943 // Two bytes misalignment happens only for byte and short (char) arrays
5944 testptr(to, 2);
5945 jccb(Assembler::zero, L_skip_align2);
5946 movw(Address(to, 0), value);
5947 addptr(to, 2);
5948 subl(count, 1<<(shift-1));
5949 BIND(L_skip_align2);
5950 }
5951 if (UseSSE < 2) {
5952 Label L_fill_32_bytes_loop, L_check_fill_8_bytes, L_fill_8_bytes_loop, L_fill_8_bytes;
5953 // Fill 32-byte chunks
5954 subl(count, 8 << shift);
5955 jcc(Assembler::less, L_check_fill_8_bytes);
5956 align(16);
5957
5958 BIND(L_fill_32_bytes_loop);
5959
5960 for (int i = 0; i < 32; i += 4) {
5961 movl(Address(to, i), value);
5962 }
5963
5964 addptr(to, 32);
5965 subl(count, 8 << shift);
5966 jcc(Assembler::greaterEqual, L_fill_32_bytes_loop);
5967 BIND(L_check_fill_8_bytes);
5968 addl(count, 8 << shift);
5969 jccb(Assembler::zero, L_exit);
5970 jmpb(L_fill_8_bytes);
5971
5972 //
5973 // length is too short, just fill qwords
5974 //
5975 BIND(L_fill_8_bytes_loop);
5976 movl(Address(to, 0), value);
5977 movl(Address(to, 4), value);
5978 addptr(to, 8);
5979 BIND(L_fill_8_bytes);
5980 subl(count, 1 << (shift + 1));
5981 jcc(Assembler::greaterEqual, L_fill_8_bytes_loop);
5982 // fall through to fill 4 bytes
5983 } else {
5984 Label L_fill_32_bytes;
5985 if (!UseUnalignedLoadStores) {
5986 // align to 8 bytes, we know we are 4 byte aligned to start
5987 testptr(to, 4);
5988 jccb(Assembler::zero, L_fill_32_bytes);
5989 movl(Address(to, 0), value);
5990 addptr(to, 4);
5991 subl(count, 1<<shift);
5992 }
5993 BIND(L_fill_32_bytes);
5994 {
5995 assert( UseSSE >= 2, "supported cpu only" );
5996 Label L_fill_32_bytes_loop, L_check_fill_8_bytes, L_fill_8_bytes_loop, L_fill_8_bytes;
5997 // Fill 32-byte chunks
5998 movdl(xtmp, value);
5999 pshufd(xtmp, xtmp, 0);
6000
6001 subl(count, 8 << shift);
6002 jcc(Assembler::less, L_check_fill_8_bytes);
6003 align(16);
6004
6005 BIND(L_fill_32_bytes_loop);
6006
6007 if (UseUnalignedLoadStores) {
6008 movdqu(Address(to, 0), xtmp);
6009 movdqu(Address(to, 16), xtmp);
6010 } else {
6011 movq(Address(to, 0), xtmp);
6012 movq(Address(to, 8), xtmp);
6013 movq(Address(to, 16), xtmp);
6014 movq(Address(to, 24), xtmp);
6015 }
6016
6017 addptr(to, 32);
6018 subl(count, 8 << shift);
6019 jcc(Assembler::greaterEqual, L_fill_32_bytes_loop);
6020 BIND(L_check_fill_8_bytes);
6021 addl(count, 8 << shift);
6022 jccb(Assembler::zero, L_exit);
6023 jmpb(L_fill_8_bytes);
6024
6025 //
6026 // length is too short, just fill qwords
6027 //
6028 BIND(L_fill_8_bytes_loop);
6029 movq(Address(to, 0), xtmp);
6030 addptr(to, 8);
6031 BIND(L_fill_8_bytes);
6032 subl(count, 1 << (shift + 1));
6033 jcc(Assembler::greaterEqual, L_fill_8_bytes_loop);
6034 }
6035 }
6036 // fill trailing 4 bytes
6037 BIND(L_fill_4_bytes);
6038 testl(count, 1<<shift);
6039 jccb(Assembler::zero, L_fill_2_bytes);
6040 movl(Address(to, 0), value);
6041 if (t == T_BYTE || t == T_SHORT) {
6042 addptr(to, 4);
6043 BIND(L_fill_2_bytes);
6044 // fill trailing 2 bytes
6045 testl(count, 1<<(shift-1));
6046 jccb(Assembler::zero, L_fill_byte);
6047 movw(Address(to, 0), value);
6048 if (t == T_BYTE) {
6049 addptr(to, 2);
6050 BIND(L_fill_byte);
6051 // fill trailing byte
6052 testl(count, 1);
6053 jccb(Assembler::zero, L_exit);
6054 movb(Address(to, 0), value);
6055 } else {
6056 BIND(L_fill_byte);
6057 }
6058 } else {
6059 BIND(L_fill_2_bytes);
6060 }
6061 BIND(L_exit);
6062 }
6063 #undef BIND
6064 #undef BLOCK_COMMENT
6065
6066
6067 Assembler::Condition MacroAssembler::negate_condition(Assembler::Condition cond) {
6068 switch (cond) {
6069 // Note some conditions are synonyms for others
6070 case Assembler::zero: return Assembler::notZero;
6071 case Assembler::notZero: return Assembler::zero;
6072 case Assembler::less: return Assembler::greaterEqual;
6073 case Assembler::lessEqual: return Assembler::greater;
6074 case Assembler::greater: return Assembler::lessEqual;
6075 case Assembler::greaterEqual: return Assembler::less;
6076 case Assembler::below: return Assembler::aboveEqual;
6077 case Assembler::belowEqual: return Assembler::above;
6078 case Assembler::above: return Assembler::belowEqual;
6079 case Assembler::aboveEqual: return Assembler::below;
6080 case Assembler::overflow: return Assembler::noOverflow;
6081 case Assembler::noOverflow: return Assembler::overflow;
6082 case Assembler::negative: return Assembler::positive;
6083 case Assembler::positive: return Assembler::negative;
6084 case Assembler::parity: return Assembler::noParity;
6085 case Assembler::noParity: return Assembler::parity;
6086 }
6087 ShouldNotReachHere(); return Assembler::overflow;
6088 }
6089
6090 SkipIfEqual::SkipIfEqual(
6091 MacroAssembler* masm, const bool* flag_addr, bool value) {
6092 _masm = masm;
6093 _masm->cmp8(ExternalAddress((address)flag_addr), value);
6094 _masm->jcc(Assembler::equal, _label);
6095 }
6096
6097 SkipIfEqual::~SkipIfEqual() {
6098 _masm->bind(_label);
6099 }