1 /*
2 * Copyright (c) 1997, 2019, 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/macroAssembler.hpp"
27 #include "compiler/disassembler.hpp"
28 #include "interpreter/interpreter.hpp"
29 #include "interpreter/interpreterRuntime.hpp"
30 #include "interpreter/interp_masm.hpp"
31 #include "interpreter/templateTable.hpp"
32 #include "memory/universe.hpp"
33 #include "oops/methodData.hpp"
34 #include "oops/objArrayKlass.hpp"
35 #include "oops/oop.inline.hpp"
36 #include "prims/methodHandles.hpp"
37 #include "runtime/frame.inline.hpp"
38 #include "runtime/safepointMechanism.hpp"
39 #include "runtime/sharedRuntime.hpp"
40 #include "runtime/stubRoutines.hpp"
41 #include "runtime/synchronizer.hpp"
42 #include "utilities/macros.hpp"
43
44 #define __ Disassembler::hook<InterpreterMacroAssembler>(__FILE__, __LINE__, _masm)->
45
46 // Global Register Names
47 static const Register rbcp = LP64_ONLY(r13) NOT_LP64(rsi);
48 static const Register rlocals = LP64_ONLY(r14) NOT_LP64(rdi);
49
50 // Platform-dependent initialization
51 void TemplateTable::pd_initialize() {
52 // No x86 specific initialization
53 }
54
55 // Address Computation: local variables
56 static inline Address iaddress(int n) {
57 return Address(rlocals, Interpreter::local_offset_in_bytes(n));
58 }
59
60 static inline Address laddress(int n) {
61 return iaddress(n + 1);
62 }
63
64 #ifndef _LP64
65 static inline Address haddress(int n) {
66 return iaddress(n + 0);
67 }
68 #endif
69
70 static inline Address faddress(int n) {
71 return iaddress(n);
72 }
73
74 static inline Address daddress(int n) {
75 return laddress(n);
76 }
77
78 static inline Address aaddress(int n) {
79 return iaddress(n);
80 }
81
82 static inline Address iaddress(Register r) {
83 return Address(rlocals, r, Address::times_ptr);
84 }
85
86 static inline Address laddress(Register r) {
87 return Address(rlocals, r, Address::times_ptr, Interpreter::local_offset_in_bytes(1));
88 }
89
90 #ifndef _LP64
91 static inline Address haddress(Register r) {
92 return Address(rlocals, r, Interpreter::stackElementScale(), Interpreter::local_offset_in_bytes(0));
93 }
94 #endif
95
96 static inline Address faddress(Register r) {
97 return iaddress(r);
98 }
99
100 static inline Address daddress(Register r) {
101 return laddress(r);
102 }
103
104 static inline Address aaddress(Register r) {
105 return iaddress(r);
106 }
107
108
109 // expression stack
110 // (Note: Must not use symmetric equivalents at_rsp_m1/2 since they store
111 // data beyond the rsp which is potentially unsafe in an MT environment;
112 // an interrupt may overwrite that data.)
113 static inline Address at_rsp () {
114 return Address(rsp, 0);
115 }
116
117 // At top of Java expression stack which may be different than esp(). It
118 // isn't for category 1 objects.
119 static inline Address at_tos () {
120 return Address(rsp, Interpreter::expr_offset_in_bytes(0));
121 }
122
123 static inline Address at_tos_p1() {
124 return Address(rsp, Interpreter::expr_offset_in_bytes(1));
125 }
126
127 static inline Address at_tos_p2() {
128 return Address(rsp, Interpreter::expr_offset_in_bytes(2));
129 }
130
131 // Condition conversion
132 static Assembler::Condition j_not(TemplateTable::Condition cc) {
133 switch (cc) {
134 case TemplateTable::equal : return Assembler::notEqual;
135 case TemplateTable::not_equal : return Assembler::equal;
136 case TemplateTable::less : return Assembler::greaterEqual;
137 case TemplateTable::less_equal : return Assembler::greater;
138 case TemplateTable::greater : return Assembler::lessEqual;
139 case TemplateTable::greater_equal: return Assembler::less;
140 }
141 ShouldNotReachHere();
142 return Assembler::zero;
143 }
144
145
146
147 // Miscelaneous helper routines
148 // Store an oop (or NULL) at the address described by obj.
149 // If val == noreg this means store a NULL
150
151
152 static void do_oop_store(InterpreterMacroAssembler* _masm,
153 Address dst,
154 Register val,
155 DecoratorSet decorators = 0) {
156 assert(val == noreg || val == rax, "parameter is just for looks");
157 __ store_heap_oop(dst, val, rdx, rbx, noreg, decorators);
158 }
159
160 static void do_oop_load(InterpreterMacroAssembler* _masm,
161 Address src,
162 Register dst,
163 DecoratorSet decorators = 0) {
164 __ load_heap_oop(dst, src, rdx, rbx, decorators);
165 }
166
167 Address TemplateTable::at_bcp(int offset) {
168 assert(_desc->uses_bcp(), "inconsistent uses_bcp information");
169 return Address(rbcp, offset);
170 }
171
172
173 void TemplateTable::patch_bytecode(Bytecodes::Code bc, Register bc_reg,
174 Register temp_reg, bool load_bc_into_bc_reg/*=true*/,
175 int byte_no) {
176 if (!RewriteBytecodes) return;
177 Label L_patch_done;
178
179 switch (bc) {
180 case Bytecodes::_fast_qputfield:
181 case Bytecodes::_fast_aputfield:
182 case Bytecodes::_fast_bputfield:
183 case Bytecodes::_fast_zputfield:
184 case Bytecodes::_fast_cputfield:
185 case Bytecodes::_fast_dputfield:
186 case Bytecodes::_fast_fputfield:
187 case Bytecodes::_fast_iputfield:
188 case Bytecodes::_fast_lputfield:
189 case Bytecodes::_fast_sputfield:
190 {
191 // We skip bytecode quickening for putfield instructions when
192 // the put_code written to the constant pool cache is zero.
193 // This is required so that every execution of this instruction
194 // calls out to InterpreterRuntime::resolve_get_put to do
195 // additional, required work.
196 assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range");
197 assert(load_bc_into_bc_reg, "we use bc_reg as temp");
198 __ get_cache_and_index_and_bytecode_at_bcp(temp_reg, bc_reg, temp_reg, byte_no, 1);
199 __ movl(bc_reg, bc);
200 __ cmpl(temp_reg, (int) 0);
201 __ jcc(Assembler::zero, L_patch_done); // don't patch
202 }
203 break;
204 default:
205 assert(byte_no == -1, "sanity");
206 // the pair bytecodes have already done the load.
207 if (load_bc_into_bc_reg) {
208 __ movl(bc_reg, bc);
209 }
210 }
211
212 if (JvmtiExport::can_post_breakpoint()) {
213 Label L_fast_patch;
214 // if a breakpoint is present we can't rewrite the stream directly
215 __ movzbl(temp_reg, at_bcp(0));
216 __ cmpl(temp_reg, Bytecodes::_breakpoint);
217 __ jcc(Assembler::notEqual, L_fast_patch);
218 __ get_method(temp_reg);
219 // Let breakpoint table handling rewrite to quicker bytecode
220 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::set_original_bytecode_at), temp_reg, rbcp, bc_reg);
221 #ifndef ASSERT
222 __ jmpb(L_patch_done);
223 #else
224 __ jmp(L_patch_done);
225 #endif
226 __ bind(L_fast_patch);
227 }
228
229 #ifdef ASSERT
230 Label L_okay;
231 __ load_unsigned_byte(temp_reg, at_bcp(0));
232 __ cmpl(temp_reg, (int) Bytecodes::java_code(bc));
233 __ jcc(Assembler::equal, L_okay);
234 __ cmpl(temp_reg, bc_reg);
235 __ jcc(Assembler::equal, L_okay);
236 __ stop("patching the wrong bytecode");
237 __ bind(L_okay);
238 #endif
239
240 // patch bytecode
241 __ movb(at_bcp(0), bc_reg);
242 __ bind(L_patch_done);
243 }
244 // Individual instructions
245
246
247 void TemplateTable::nop() {
248 transition(vtos, vtos);
249 // nothing to do
250 }
251
252 void TemplateTable::shouldnotreachhere() {
253 transition(vtos, vtos);
254 __ stop("shouldnotreachhere bytecode");
255 }
256
257 void TemplateTable::aconst_null() {
258 transition(vtos, atos);
259 __ xorl(rax, rax);
260 }
261
262 void TemplateTable::iconst(int value) {
263 transition(vtos, itos);
264 if (value == 0) {
265 __ xorl(rax, rax);
266 } else {
267 __ movl(rax, value);
268 }
269 }
270
271 void TemplateTable::lconst(int value) {
272 transition(vtos, ltos);
273 if (value == 0) {
274 __ xorl(rax, rax);
275 } else {
276 __ movl(rax, value);
277 }
278 #ifndef _LP64
279 assert(value >= 0, "check this code");
280 __ xorptr(rdx, rdx);
281 #endif
282 }
283
284
285
286 void TemplateTable::fconst(int value) {
287 transition(vtos, ftos);
288 if (UseSSE >= 1) {
289 static float one = 1.0f, two = 2.0f;
290 switch (value) {
291 case 0:
292 __ xorps(xmm0, xmm0);
293 break;
294 case 1:
295 __ movflt(xmm0, ExternalAddress((address) &one));
296 break;
297 case 2:
298 __ movflt(xmm0, ExternalAddress((address) &two));
299 break;
300 default:
301 ShouldNotReachHere();
302 break;
303 }
304 } else {
305 #ifdef _LP64
306 ShouldNotReachHere();
307 #else
308 if (value == 0) { __ fldz();
309 } else if (value == 1) { __ fld1();
310 } else if (value == 2) { __ fld1(); __ fld1(); __ faddp(); // should do a better solution here
311 } else { ShouldNotReachHere();
312 }
313 #endif // _LP64
314 }
315 }
316
317 void TemplateTable::dconst(int value) {
318 transition(vtos, dtos);
319 if (UseSSE >= 2) {
320 static double one = 1.0;
321 switch (value) {
322 case 0:
323 __ xorpd(xmm0, xmm0);
324 break;
325 case 1:
326 __ movdbl(xmm0, ExternalAddress((address) &one));
327 break;
328 default:
329 ShouldNotReachHere();
330 break;
331 }
332 } else {
333 #ifdef _LP64
334 ShouldNotReachHere();
335 #else
336 if (value == 0) { __ fldz();
337 } else if (value == 1) { __ fld1();
338 } else { ShouldNotReachHere();
339 }
340 #endif
341 }
342 }
343
344 void TemplateTable::bipush() {
345 transition(vtos, itos);
346 __ load_signed_byte(rax, at_bcp(1));
347 }
348
349 void TemplateTable::sipush() {
350 transition(vtos, itos);
351 __ load_unsigned_short(rax, at_bcp(1));
352 __ bswapl(rax);
353 __ sarl(rax, 16);
354 }
355
356 void TemplateTable::ldc(bool wide) {
357 transition(vtos, vtos);
358 Register rarg = NOT_LP64(rcx) LP64_ONLY(c_rarg1);
359 Label call_ldc, notFloat, notClass, notInt, Done;
360
361 if (wide) {
362 __ get_unsigned_2_byte_index_at_bcp(rbx, 1);
363 } else {
364 __ load_unsigned_byte(rbx, at_bcp(1));
365 }
366
367 __ get_cpool_and_tags(rcx, rax);
368 const int base_offset = ConstantPool::header_size() * wordSize;
369 const int tags_offset = Array<u1>::base_offset_in_bytes();
370
371 // get type
372 __ movzbl(rdx, Address(rax, rbx, Address::times_1, tags_offset));
373 __ andl(rdx, ~JVM_CONSTANT_QDescBit);
374
375 // unresolved class - get the resolved class
376 __ cmpl(rdx, JVM_CONSTANT_UnresolvedClass);
377 __ jccb(Assembler::equal, call_ldc);
378
379 // unresolved class in error state - call into runtime to throw the error
380 // from the first resolution attempt
381 __ cmpl(rdx, JVM_CONSTANT_UnresolvedClassInError);
382 __ jccb(Assembler::equal, call_ldc);
383
384 // resolved class - need to call vm to get java mirror of the class
385 __ cmpl(rdx, JVM_CONSTANT_Class);
386 __ jcc(Assembler::notEqual, notClass);
387
388 __ bind(call_ldc);
389
390 __ movl(rarg, wide);
391 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::ldc), rarg);
392
393 __ push(atos);
394 __ jmp(Done);
395
396 __ bind(notClass);
397 __ cmpl(rdx, JVM_CONSTANT_Float);
398 __ jccb(Assembler::notEqual, notFloat);
399
400 // ftos
401 __ load_float(Address(rcx, rbx, Address::times_ptr, base_offset));
402 __ push(ftos);
403 __ jmp(Done);
404
405 __ bind(notFloat);
406 __ cmpl(rdx, JVM_CONSTANT_Integer);
407 __ jccb(Assembler::notEqual, notInt);
408
409 // itos
410 __ movl(rax, Address(rcx, rbx, Address::times_ptr, base_offset));
411 __ push(itos);
412 __ jmp(Done);
413
414 // assume the tag is for condy; if not, the VM runtime will tell us
415 __ bind(notInt);
416 condy_helper(Done);
417
418 __ bind(Done);
419 }
420
421 // Fast path for caching oop constants.
422 void TemplateTable::fast_aldc(bool wide) {
423 transition(vtos, atos);
424
425 Register result = rax;
426 Register tmp = rdx;
427 Register rarg = NOT_LP64(rcx) LP64_ONLY(c_rarg1);
428 int index_size = wide ? sizeof(u2) : sizeof(u1);
429
430 Label resolved;
431
432 // We are resolved if the resolved reference cache entry contains a
433 // non-null object (String, MethodType, etc.)
434 assert_different_registers(result, tmp);
435 __ get_cache_index_at_bcp(tmp, 1, index_size);
436 __ load_resolved_reference_at_index(result, tmp);
437 __ testptr(result, result);
438 __ jcc(Assembler::notZero, resolved);
439
440 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc);
441
442 // first time invocation - must resolve first
443 __ movl(rarg, (int)bytecode());
444 __ call_VM(result, entry, rarg);
445 __ bind(resolved);
446
447 { // Check for the null sentinel.
448 // If we just called the VM, it already did the mapping for us,
449 // but it's harmless to retry.
450 Label notNull;
451 ExternalAddress null_sentinel((address)Universe::the_null_sentinel_addr());
452 __ movptr(tmp, null_sentinel);
453 __ cmpoop(tmp, result);
454 __ jccb(Assembler::notEqual, notNull);
455 __ xorptr(result, result); // NULL object reference
456 __ bind(notNull);
457 }
458
459 if (VerifyOops) {
460 __ verify_oop(result);
461 }
462 }
463
464 void TemplateTable::ldc2_w() {
465 transition(vtos, vtos);
466 Label notDouble, notLong, Done;
467 __ get_unsigned_2_byte_index_at_bcp(rbx, 1);
468
469 __ get_cpool_and_tags(rcx, rax);
470 const int base_offset = ConstantPool::header_size() * wordSize;
471 const int tags_offset = Array<u1>::base_offset_in_bytes();
472
473 // get type
474 __ movzbl(rdx, Address(rax, rbx, Address::times_1, tags_offset));
475 __ cmpl(rdx, JVM_CONSTANT_Double);
476 __ jccb(Assembler::notEqual, notDouble);
477
478 // dtos
479 __ load_double(Address(rcx, rbx, Address::times_ptr, base_offset));
480 __ push(dtos);
481
482 __ jmp(Done);
483 __ bind(notDouble);
484 __ cmpl(rdx, JVM_CONSTANT_Long);
485 __ jccb(Assembler::notEqual, notLong);
486
487 // ltos
488 __ movptr(rax, Address(rcx, rbx, Address::times_ptr, base_offset + 0 * wordSize));
489 NOT_LP64(__ movptr(rdx, Address(rcx, rbx, Address::times_ptr, base_offset + 1 * wordSize)));
490 __ push(ltos);
491 __ jmp(Done);
492
493 __ bind(notLong);
494 condy_helper(Done);
495
496 __ bind(Done);
497 }
498
499 void TemplateTable::condy_helper(Label& Done) {
500 const Register obj = rax;
501 const Register off = rbx;
502 const Register flags = rcx;
503 const Register rarg = NOT_LP64(rcx) LP64_ONLY(c_rarg1);
504 __ movl(rarg, (int)bytecode());
505 call_VM(obj, CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc), rarg);
506 #ifndef _LP64
507 // borrow rdi from locals
508 __ get_thread(rdi);
509 __ get_vm_result_2(flags, rdi);
510 __ restore_locals();
511 #else
512 __ get_vm_result_2(flags, r15_thread);
513 #endif
514 // VMr = obj = base address to find primitive value to push
515 // VMr2 = flags = (tos, off) using format of CPCE::_flags
516 __ movl(off, flags);
517 __ andl(off, ConstantPoolCacheEntry::field_index_mask);
518 const Address field(obj, off, Address::times_1, 0*wordSize);
519
520 // What sort of thing are we loading?
521 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift);
522 __ andl(flags, ConstantPoolCacheEntry::tos_state_mask);
523
524 switch (bytecode()) {
525 case Bytecodes::_ldc:
526 case Bytecodes::_ldc_w:
527 {
528 // tos in (itos, ftos, stos, btos, ctos, ztos)
529 Label notInt, notFloat, notShort, notByte, notChar, notBool;
530 __ cmpl(flags, itos);
531 __ jcc(Assembler::notEqual, notInt);
532 // itos
533 __ movl(rax, field);
534 __ push(itos);
535 __ jmp(Done);
536
537 __ bind(notInt);
538 __ cmpl(flags, ftos);
539 __ jcc(Assembler::notEqual, notFloat);
540 // ftos
541 __ load_float(field);
542 __ push(ftos);
543 __ jmp(Done);
544
545 __ bind(notFloat);
546 __ cmpl(flags, stos);
547 __ jcc(Assembler::notEqual, notShort);
548 // stos
549 __ load_signed_short(rax, field);
550 __ push(stos);
551 __ jmp(Done);
552
553 __ bind(notShort);
554 __ cmpl(flags, btos);
555 __ jcc(Assembler::notEqual, notByte);
556 // btos
557 __ load_signed_byte(rax, field);
558 __ push(btos);
559 __ jmp(Done);
560
561 __ bind(notByte);
562 __ cmpl(flags, ctos);
563 __ jcc(Assembler::notEqual, notChar);
564 // ctos
565 __ load_unsigned_short(rax, field);
566 __ push(ctos);
567 __ jmp(Done);
568
569 __ bind(notChar);
570 __ cmpl(flags, ztos);
571 __ jcc(Assembler::notEqual, notBool);
572 // ztos
573 __ load_signed_byte(rax, field);
574 __ push(ztos);
575 __ jmp(Done);
576
577 __ bind(notBool);
578 break;
579 }
580
581 case Bytecodes::_ldc2_w:
582 {
583 Label notLong, notDouble;
584 __ cmpl(flags, ltos);
585 __ jcc(Assembler::notEqual, notLong);
586 // ltos
587 // Loading high word first because movptr clobbers rax
588 NOT_LP64(__ movptr(rdx, field.plus_disp(4)));
589 __ movptr(rax, field);
590 __ push(ltos);
591 __ jmp(Done);
592
593 __ bind(notLong);
594 __ cmpl(flags, dtos);
595 __ jcc(Assembler::notEqual, notDouble);
596 // dtos
597 __ load_double(field);
598 __ push(dtos);
599 __ jmp(Done);
600
601 __ bind(notDouble);
602 break;
603 }
604
605 default:
606 ShouldNotReachHere();
607 }
608
609 __ stop("bad ldc/condy");
610 }
611
612 void TemplateTable::locals_index(Register reg, int offset) {
613 __ load_unsigned_byte(reg, at_bcp(offset));
614 __ negptr(reg);
615 }
616
617 void TemplateTable::iload() {
618 iload_internal();
619 }
620
621 void TemplateTable::nofast_iload() {
622 iload_internal(may_not_rewrite);
623 }
624
625 void TemplateTable::iload_internal(RewriteControl rc) {
626 transition(vtos, itos);
627 if (RewriteFrequentPairs && rc == may_rewrite) {
628 Label rewrite, done;
629 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
630 LP64_ONLY(assert(rbx != bc, "register damaged"));
631
632 // get next byte
633 __ load_unsigned_byte(rbx,
634 at_bcp(Bytecodes::length_for(Bytecodes::_iload)));
635 // if _iload, wait to rewrite to iload2. We only want to rewrite the
636 // last two iloads in a pair. Comparing against fast_iload means that
637 // the next bytecode is neither an iload or a caload, and therefore
638 // an iload pair.
639 __ cmpl(rbx, Bytecodes::_iload);
640 __ jcc(Assembler::equal, done);
641
642 __ cmpl(rbx, Bytecodes::_fast_iload);
643 __ movl(bc, Bytecodes::_fast_iload2);
644
645 __ jccb(Assembler::equal, rewrite);
646
647 // if _caload, rewrite to fast_icaload
648 __ cmpl(rbx, Bytecodes::_caload);
649 __ movl(bc, Bytecodes::_fast_icaload);
650 __ jccb(Assembler::equal, rewrite);
651
652 // rewrite so iload doesn't check again.
653 __ movl(bc, Bytecodes::_fast_iload);
654
655 // rewrite
656 // bc: fast bytecode
657 __ bind(rewrite);
658 patch_bytecode(Bytecodes::_iload, bc, rbx, false);
659 __ bind(done);
660 }
661
662 // Get the local value into tos
663 locals_index(rbx);
664 __ movl(rax, iaddress(rbx));
665 }
666
667 void TemplateTable::fast_iload2() {
668 transition(vtos, itos);
669 locals_index(rbx);
670 __ movl(rax, iaddress(rbx));
671 __ push(itos);
672 locals_index(rbx, 3);
673 __ movl(rax, iaddress(rbx));
674 }
675
676 void TemplateTable::fast_iload() {
677 transition(vtos, itos);
678 locals_index(rbx);
679 __ movl(rax, iaddress(rbx));
680 }
681
682 void TemplateTable::lload() {
683 transition(vtos, ltos);
684 locals_index(rbx);
685 __ movptr(rax, laddress(rbx));
686 NOT_LP64(__ movl(rdx, haddress(rbx)));
687 }
688
689 void TemplateTable::fload() {
690 transition(vtos, ftos);
691 locals_index(rbx);
692 __ load_float(faddress(rbx));
693 }
694
695 void TemplateTable::dload() {
696 transition(vtos, dtos);
697 locals_index(rbx);
698 __ load_double(daddress(rbx));
699 }
700
701 void TemplateTable::aload() {
702 transition(vtos, atos);
703 locals_index(rbx);
704 __ movptr(rax, aaddress(rbx));
705 }
706
707 void TemplateTable::locals_index_wide(Register reg) {
708 __ load_unsigned_short(reg, at_bcp(2));
709 __ bswapl(reg);
710 __ shrl(reg, 16);
711 __ negptr(reg);
712 }
713
714 void TemplateTable::wide_iload() {
715 transition(vtos, itos);
716 locals_index_wide(rbx);
717 __ movl(rax, iaddress(rbx));
718 }
719
720 void TemplateTable::wide_lload() {
721 transition(vtos, ltos);
722 locals_index_wide(rbx);
723 __ movptr(rax, laddress(rbx));
724 NOT_LP64(__ movl(rdx, haddress(rbx)));
725 }
726
727 void TemplateTable::wide_fload() {
728 transition(vtos, ftos);
729 locals_index_wide(rbx);
730 __ load_float(faddress(rbx));
731 }
732
733 void TemplateTable::wide_dload() {
734 transition(vtos, dtos);
735 locals_index_wide(rbx);
736 __ load_double(daddress(rbx));
737 }
738
739 void TemplateTable::wide_aload() {
740 transition(vtos, atos);
741 locals_index_wide(rbx);
742 __ movptr(rax, aaddress(rbx));
743 }
744
745 void TemplateTable::index_check(Register array, Register index) {
746 // Pop ptr into array
747 __ pop_ptr(array);
748 index_check_without_pop(array, index);
749 }
750
751 void TemplateTable::index_check_without_pop(Register array, Register index) {
752 // destroys rbx
753 // check array
754 __ null_check(array, arrayOopDesc::length_offset_in_bytes());
755 // sign extend index for use by indexed load
756 __ movl2ptr(index, index);
757 // check index
758 __ cmpl(index, Address(array, arrayOopDesc::length_offset_in_bytes()));
759 if (index != rbx) {
760 // ??? convention: move aberrant index into rbx for exception message
761 assert(rbx != array, "different registers");
762 __ movl(rbx, index);
763 }
764 Label skip;
765 __ jccb(Assembler::below, skip);
766 // Pass array to create more detailed exceptions.
767 __ mov(NOT_LP64(rax) LP64_ONLY(c_rarg1), array);
768 __ jump(ExternalAddress(Interpreter::_throw_ArrayIndexOutOfBoundsException_entry));
769 __ bind(skip);
770 }
771
772 void TemplateTable::iaload() {
773 transition(itos, itos);
774 // rax: index
775 // rdx: array
776 index_check(rdx, rax); // kills rbx
777 __ access_load_at(T_INT, IN_HEAP | IS_ARRAY, rax,
778 Address(rdx, rax, Address::times_4,
779 arrayOopDesc::base_offset_in_bytes(T_INT)),
780 noreg, noreg);
781 }
782
783 void TemplateTable::laload() {
784 transition(itos, ltos);
785 // rax: index
786 // rdx: array
787 index_check(rdx, rax); // kills rbx
788 NOT_LP64(__ mov(rbx, rax));
789 // rbx,: index
790 __ access_load_at(T_LONG, IN_HEAP | IS_ARRAY, noreg /* ltos */,
791 Address(rdx, rbx, Address::times_8,
792 arrayOopDesc::base_offset_in_bytes(T_LONG)),
793 noreg, noreg);
794 }
795
796
797
798 void TemplateTable::faload() {
799 transition(itos, ftos);
800 // rax: index
801 // rdx: array
802 index_check(rdx, rax); // kills rbx
803 __ access_load_at(T_FLOAT, IN_HEAP | IS_ARRAY, noreg /* ftos */,
804 Address(rdx, rax,
805 Address::times_4,
806 arrayOopDesc::base_offset_in_bytes(T_FLOAT)),
807 noreg, noreg);
808 }
809
810 void TemplateTable::daload() {
811 transition(itos, dtos);
812 // rax: index
813 // rdx: array
814 index_check(rdx, rax); // kills rbx
815 __ access_load_at(T_DOUBLE, IN_HEAP | IS_ARRAY, noreg /* dtos */,
816 Address(rdx, rax,
817 Address::times_8,
818 arrayOopDesc::base_offset_in_bytes(T_DOUBLE)),
819 noreg, noreg);
820 }
821
822 void TemplateTable::aaload() {
823 transition(itos, atos);
824
825 Register array = rcx;
826 Register index = rax;
827
828 index_check(array, index); // kills rbx
829 if (ValueArrayFlatten) {
830 Label is_flat_array, done;
831 __ test_flattened_array_oop(array, rbx, is_flat_array);
832 do_oop_load(_masm,
833 Address(array, index,
834 UseCompressedOops ? Address::times_4 : Address::times_ptr,
835 arrayOopDesc::base_offset_in_bytes(T_OBJECT)),
836 rax,
837 IS_ARRAY);
838 __ jmp(done);
839 __ bind(is_flat_array);
840 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::value_array_load), array, index);
841 __ bind(done);
842 } else {
843 do_oop_load(_masm,
844 Address(array, index,
845 UseCompressedOops ? Address::times_4 : Address::times_ptr,
846 arrayOopDesc::base_offset_in_bytes(T_OBJECT)),
847 rax,
848 IS_ARRAY);
849 }
850 }
851
852 void TemplateTable::baload() {
853 transition(itos, itos);
854 // rax: index
855 // rdx: array
856 index_check(rdx, rax); // kills rbx
857 __ access_load_at(T_BYTE, IN_HEAP | IS_ARRAY, rax,
858 Address(rdx, rax, Address::times_1, arrayOopDesc::base_offset_in_bytes(T_BYTE)),
859 noreg, noreg);
860 }
861
862 void TemplateTable::caload() {
863 transition(itos, itos);
864 // rax: index
865 // rdx: array
866 index_check(rdx, rax); // kills rbx
867 __ access_load_at(T_CHAR, IN_HEAP | IS_ARRAY, rax,
868 Address(rdx, rax, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR)),
869 noreg, noreg);
870 }
871
872 // iload followed by caload frequent pair
873 void TemplateTable::fast_icaload() {
874 transition(vtos, itos);
875 // load index out of locals
876 locals_index(rbx);
877 __ movl(rax, iaddress(rbx));
878
879 // rax: index
880 // rdx: array
881 index_check(rdx, rax); // kills rbx
882 __ access_load_at(T_CHAR, IN_HEAP | IS_ARRAY, rax,
883 Address(rdx, rax, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR)),
884 noreg, noreg);
885 }
886
887
888 void TemplateTable::saload() {
889 transition(itos, itos);
890 // rax: index
891 // rdx: array
892 index_check(rdx, rax); // kills rbx
893 __ access_load_at(T_SHORT, IN_HEAP | IS_ARRAY, rax,
894 Address(rdx, rax, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_SHORT)),
895 noreg, noreg);
896 }
897
898 void TemplateTable::iload(int n) {
899 transition(vtos, itos);
900 __ movl(rax, iaddress(n));
901 }
902
903 void TemplateTable::lload(int n) {
904 transition(vtos, ltos);
905 __ movptr(rax, laddress(n));
906 NOT_LP64(__ movptr(rdx, haddress(n)));
907 }
908
909 void TemplateTable::fload(int n) {
910 transition(vtos, ftos);
911 __ load_float(faddress(n));
912 }
913
914 void TemplateTable::dload(int n) {
915 transition(vtos, dtos);
916 __ load_double(daddress(n));
917 }
918
919 void TemplateTable::aload(int n) {
920 transition(vtos, atos);
921 __ movptr(rax, aaddress(n));
922 }
923
924 void TemplateTable::aload_0() {
925 aload_0_internal();
926 }
927
928 void TemplateTable::nofast_aload_0() {
929 aload_0_internal(may_not_rewrite);
930 }
931
932 void TemplateTable::aload_0_internal(RewriteControl rc) {
933 transition(vtos, atos);
934 // According to bytecode histograms, the pairs:
935 //
936 // _aload_0, _fast_igetfield
937 // _aload_0, _fast_agetfield
938 // _aload_0, _fast_fgetfield
939 //
940 // occur frequently. If RewriteFrequentPairs is set, the (slow)
941 // _aload_0 bytecode checks if the next bytecode is either
942 // _fast_igetfield, _fast_agetfield or _fast_fgetfield and then
943 // rewrites the current bytecode into a pair bytecode; otherwise it
944 // rewrites the current bytecode into _fast_aload_0 that doesn't do
945 // the pair check anymore.
946 //
947 // Note: If the next bytecode is _getfield, the rewrite must be
948 // delayed, otherwise we may miss an opportunity for a pair.
949 //
950 // Also rewrite frequent pairs
951 // aload_0, aload_1
952 // aload_0, iload_1
953 // These bytecodes with a small amount of code are most profitable
954 // to rewrite
955 if (RewriteFrequentPairs && rc == may_rewrite) {
956 Label rewrite, done;
957
958 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
959 LP64_ONLY(assert(rbx != bc, "register damaged"));
960
961 // get next byte
962 __ load_unsigned_byte(rbx, at_bcp(Bytecodes::length_for(Bytecodes::_aload_0)));
963
964 // if _getfield then wait with rewrite
965 __ cmpl(rbx, Bytecodes::_getfield);
966 __ jcc(Assembler::equal, done);
967
968 // if _igetfield then rewrite to _fast_iaccess_0
969 assert(Bytecodes::java_code(Bytecodes::_fast_iaccess_0) == Bytecodes::_aload_0, "fix bytecode definition");
970 __ cmpl(rbx, Bytecodes::_fast_igetfield);
971 __ movl(bc, Bytecodes::_fast_iaccess_0);
972 __ jccb(Assembler::equal, rewrite);
973
974 // if _agetfield then rewrite to _fast_aaccess_0
975 assert(Bytecodes::java_code(Bytecodes::_fast_aaccess_0) == Bytecodes::_aload_0, "fix bytecode definition");
976 __ cmpl(rbx, Bytecodes::_fast_agetfield);
977 __ movl(bc, Bytecodes::_fast_aaccess_0);
978 __ jccb(Assembler::equal, rewrite);
979
980 // if _fgetfield then rewrite to _fast_faccess_0
981 assert(Bytecodes::java_code(Bytecodes::_fast_faccess_0) == Bytecodes::_aload_0, "fix bytecode definition");
982 __ cmpl(rbx, Bytecodes::_fast_fgetfield);
983 __ movl(bc, Bytecodes::_fast_faccess_0);
984 __ jccb(Assembler::equal, rewrite);
985
986 // else rewrite to _fast_aload0
987 assert(Bytecodes::java_code(Bytecodes::_fast_aload_0) == Bytecodes::_aload_0, "fix bytecode definition");
988 __ movl(bc, Bytecodes::_fast_aload_0);
989
990 // rewrite
991 // bc: fast bytecode
992 __ bind(rewrite);
993 patch_bytecode(Bytecodes::_aload_0, bc, rbx, false);
994
995 __ bind(done);
996 }
997
998 // Do actual aload_0 (must do this after patch_bytecode which might call VM and GC might change oop).
999 aload(0);
1000 }
1001
1002 void TemplateTable::istore() {
1003 transition(itos, vtos);
1004 locals_index(rbx);
1005 __ movl(iaddress(rbx), rax);
1006 }
1007
1008
1009 void TemplateTable::lstore() {
1010 transition(ltos, vtos);
1011 locals_index(rbx);
1012 __ movptr(laddress(rbx), rax);
1013 NOT_LP64(__ movptr(haddress(rbx), rdx));
1014 }
1015
1016 void TemplateTable::fstore() {
1017 transition(ftos, vtos);
1018 locals_index(rbx);
1019 __ store_float(faddress(rbx));
1020 }
1021
1022 void TemplateTable::dstore() {
1023 transition(dtos, vtos);
1024 locals_index(rbx);
1025 __ store_double(daddress(rbx));
1026 }
1027
1028 void TemplateTable::astore() {
1029 transition(vtos, vtos);
1030 __ pop_ptr(rax);
1031 locals_index(rbx);
1032 __ movptr(aaddress(rbx), rax);
1033 }
1034
1035 void TemplateTable::wide_istore() {
1036 transition(vtos, vtos);
1037 __ pop_i();
1038 locals_index_wide(rbx);
1039 __ movl(iaddress(rbx), rax);
1040 }
1041
1042 void TemplateTable::wide_lstore() {
1043 transition(vtos, vtos);
1044 NOT_LP64(__ pop_l(rax, rdx));
1045 LP64_ONLY(__ pop_l());
1046 locals_index_wide(rbx);
1047 __ movptr(laddress(rbx), rax);
1048 NOT_LP64(__ movl(haddress(rbx), rdx));
1049 }
1050
1051 void TemplateTable::wide_fstore() {
1052 #ifdef _LP64
1053 transition(vtos, vtos);
1054 __ pop_f(xmm0);
1055 locals_index_wide(rbx);
1056 __ movflt(faddress(rbx), xmm0);
1057 #else
1058 wide_istore();
1059 #endif
1060 }
1061
1062 void TemplateTable::wide_dstore() {
1063 #ifdef _LP64
1064 transition(vtos, vtos);
1065 __ pop_d(xmm0);
1066 locals_index_wide(rbx);
1067 __ movdbl(daddress(rbx), xmm0);
1068 #else
1069 wide_lstore();
1070 #endif
1071 }
1072
1073 void TemplateTable::wide_astore() {
1074 transition(vtos, vtos);
1075 __ pop_ptr(rax);
1076 locals_index_wide(rbx);
1077 __ movptr(aaddress(rbx), rax);
1078 }
1079
1080 void TemplateTable::iastore() {
1081 transition(itos, vtos);
1082 __ pop_i(rbx);
1083 // rax: value
1084 // rbx: index
1085 // rdx: array
1086 index_check(rdx, rbx); // prefer index in rbx
1087 __ access_store_at(T_INT, IN_HEAP | IS_ARRAY,
1088 Address(rdx, rbx, Address::times_4,
1089 arrayOopDesc::base_offset_in_bytes(T_INT)),
1090 rax, noreg, noreg);
1091 }
1092
1093 void TemplateTable::lastore() {
1094 transition(ltos, vtos);
1095 __ pop_i(rbx);
1096 // rax,: low(value)
1097 // rcx: array
1098 // rdx: high(value)
1099 index_check(rcx, rbx); // prefer index in rbx,
1100 // rbx,: index
1101 __ access_store_at(T_LONG, IN_HEAP | IS_ARRAY,
1102 Address(rcx, rbx, Address::times_8,
1103 arrayOopDesc::base_offset_in_bytes(T_LONG)),
1104 noreg /* ltos */, noreg, noreg);
1105 }
1106
1107
1108 void TemplateTable::fastore() {
1109 transition(ftos, vtos);
1110 __ pop_i(rbx);
1111 // value is in UseSSE >= 1 ? xmm0 : ST(0)
1112 // rbx: index
1113 // rdx: array
1114 index_check(rdx, rbx); // prefer index in rbx
1115 __ access_store_at(T_FLOAT, IN_HEAP | IS_ARRAY,
1116 Address(rdx, rbx, Address::times_4,
1117 arrayOopDesc::base_offset_in_bytes(T_FLOAT)),
1118 noreg /* ftos */, noreg, noreg);
1119 }
1120
1121 void TemplateTable::dastore() {
1122 transition(dtos, vtos);
1123 __ pop_i(rbx);
1124 // value is in UseSSE >= 2 ? xmm0 : ST(0)
1125 // rbx: index
1126 // rdx: array
1127 index_check(rdx, rbx); // prefer index in rbx
1128 __ access_store_at(T_DOUBLE, IN_HEAP | IS_ARRAY,
1129 Address(rdx, rbx, Address::times_8,
1130 arrayOopDesc::base_offset_in_bytes(T_DOUBLE)),
1131 noreg /* dtos */, noreg, noreg);
1132 }
1133
1134 void TemplateTable::aastore() {
1135 Label is_null, is_flat_array, ok_is_subtype, done;
1136 transition(vtos, vtos);
1137 // stack: ..., array, index, value
1138 __ movptr(rax, at_tos()); // value
1139 __ movl(rcx, at_tos_p1()); // index
1140 __ movptr(rdx, at_tos_p2()); // array
1141
1142 Address element_address(rdx, rcx,
1143 UseCompressedOops? Address::times_4 : Address::times_ptr,
1144 arrayOopDesc::base_offset_in_bytes(T_OBJECT));
1145
1146 index_check_without_pop(rdx, rcx); // kills rbx
1147
1148 __ testptr(rax, rax);
1149 __ jcc(Assembler::zero, is_null);
1150
1151 // Move array class to rdi
1152 __ load_klass(rdi, rdx);
1153 if (ValueArrayFlatten) {
1154 __ test_flattened_array_oop(rdx, rbx, is_flat_array);
1155 }
1156
1157 // Move subklass into rbx
1158 __ load_klass(rbx, rax);
1159 // Move array element superklass into rax
1160 __ movptr(rax, Address(rdi,
1161 ObjArrayKlass::element_klass_offset()));
1162
1163 // Generate subtype check. Blows rcx, rdi
1164 // Superklass in rax. Subklass in rbx.
1165 // is "rbx <: rax" ? (value subclass <: array element superclass)
1166 __ gen_subtype_check(rbx, ok_is_subtype);
1167
1168 // Come here on failure
1169 // object is at TOS
1170 __ jump(ExternalAddress(Interpreter::_throw_ArrayStoreException_entry));
1171
1172 // Come here on success
1173 __ bind(ok_is_subtype);
1174
1175 // Get the value we will store
1176 __ movptr(rax, at_tos());
1177 __ movl(rcx, at_tos_p1()); // index
1178 // Now store using the appropriate barrier
1179 do_oop_store(_masm, element_address, rax, IS_ARRAY);
1180 __ jmp(done);
1181
1182 // Have a NULL in rax, rdx=array, ecx=index. Store NULL at ary[idx]
1183 __ bind(is_null);
1184 __ profile_null_seen(rbx);
1185 if (EnableValhalla) {
1186 Label is_null_into_value_array_npe, store_null;
1187
1188 // No way to store null in null-free array
1189 __ test_null_free_array_oop(rdx, rbx, is_null_into_value_array_npe);
1190 __ jmp(store_null);
1191
1192 __ bind(is_null_into_value_array_npe);
1193 __ jump(ExternalAddress(Interpreter::_throw_NullPointerException_entry));
1194
1195 __ bind(store_null);
1196 }
1197 // Store a NULL
1198 do_oop_store(_masm, element_address, noreg, IS_ARRAY);
1199 __ jmp(done);
1200
1201 if (EnableValhalla) {
1202 Label is_type_ok;
1203 __ bind(is_flat_array); // Store non-null value to flat
1204
1205 // Simplistic type check...
1206
1207 // Profile the not-null value's klass.
1208 __ load_klass(rbx, rax);
1209 __ profile_typecheck(rcx, rbx, rax); // blows rcx, and rax
1210 // Move element klass into rax
1211 __ movptr(rax, Address(rdi, ArrayKlass::element_klass_offset()));
1212 // flat value array needs exact type match
1213 // is "rax == rbx" (value subclass == array element superclass)
1214 __ cmpptr(rax, rbx);
1215 __ jccb(Assembler::equal, is_type_ok);
1216
1217 __ profile_typecheck_failed(rcx);
1218 __ jump(ExternalAddress(Interpreter::_throw_ArrayStoreException_entry));
1219
1220 __ bind(is_type_ok);
1221 __ movptr(rax, at_tos()); // value
1222 __ movl(rcx, at_tos_p1()); // index
1223 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::value_array_store), rax, rdx, rcx);
1224 }
1225 // Pop stack arguments
1226 __ bind(done);
1227 __ addptr(rsp, 3 * Interpreter::stackElementSize);
1228 }
1229
1230 void TemplateTable::bastore() {
1231 transition(itos, vtos);
1232 __ pop_i(rbx);
1233 // rax: value
1234 // rbx: index
1235 // rdx: array
1236 index_check(rdx, rbx); // prefer index in rbx
1237 // Need to check whether array is boolean or byte
1238 // since both types share the bastore bytecode.
1239 __ load_klass(rcx, rdx);
1240 __ movl(rcx, Address(rcx, Klass::layout_helper_offset()));
1241 int diffbit = Klass::layout_helper_boolean_diffbit();
1242 __ testl(rcx, diffbit);
1243 Label L_skip;
1244 __ jccb(Assembler::zero, L_skip);
1245 __ andl(rax, 1); // if it is a T_BOOLEAN array, mask the stored value to 0/1
1246 __ bind(L_skip);
1247 __ access_store_at(T_BYTE, IN_HEAP | IS_ARRAY,
1248 Address(rdx, rbx,Address::times_1,
1249 arrayOopDesc::base_offset_in_bytes(T_BYTE)),
1250 rax, noreg, noreg);
1251 }
1252
1253 void TemplateTable::castore() {
1254 transition(itos, vtos);
1255 __ pop_i(rbx);
1256 // rax: value
1257 // rbx: index
1258 // rdx: array
1259 index_check(rdx, rbx); // prefer index in rbx
1260 __ access_store_at(T_CHAR, IN_HEAP | IS_ARRAY,
1261 Address(rdx, rbx, Address::times_2,
1262 arrayOopDesc::base_offset_in_bytes(T_CHAR)),
1263 rax, noreg, noreg);
1264 }
1265
1266
1267 void TemplateTable::sastore() {
1268 castore();
1269 }
1270
1271 void TemplateTable::istore(int n) {
1272 transition(itos, vtos);
1273 __ movl(iaddress(n), rax);
1274 }
1275
1276 void TemplateTable::lstore(int n) {
1277 transition(ltos, vtos);
1278 __ movptr(laddress(n), rax);
1279 NOT_LP64(__ movptr(haddress(n), rdx));
1280 }
1281
1282 void TemplateTable::fstore(int n) {
1283 transition(ftos, vtos);
1284 __ store_float(faddress(n));
1285 }
1286
1287 void TemplateTable::dstore(int n) {
1288 transition(dtos, vtos);
1289 __ store_double(daddress(n));
1290 }
1291
1292
1293 void TemplateTable::astore(int n) {
1294 transition(vtos, vtos);
1295 __ pop_ptr(rax);
1296 __ movptr(aaddress(n), rax);
1297 }
1298
1299 void TemplateTable::pop() {
1300 transition(vtos, vtos);
1301 __ addptr(rsp, Interpreter::stackElementSize);
1302 }
1303
1304 void TemplateTable::pop2() {
1305 transition(vtos, vtos);
1306 __ addptr(rsp, 2 * Interpreter::stackElementSize);
1307 }
1308
1309
1310 void TemplateTable::dup() {
1311 transition(vtos, vtos);
1312 __ load_ptr(0, rax);
1313 __ push_ptr(rax);
1314 // stack: ..., a, a
1315 }
1316
1317 void TemplateTable::dup_x1() {
1318 transition(vtos, vtos);
1319 // stack: ..., a, b
1320 __ load_ptr( 0, rax); // load b
1321 __ load_ptr( 1, rcx); // load a
1322 __ store_ptr(1, rax); // store b
1323 __ store_ptr(0, rcx); // store a
1324 __ push_ptr(rax); // push b
1325 // stack: ..., b, a, b
1326 }
1327
1328 void TemplateTable::dup_x2() {
1329 transition(vtos, vtos);
1330 // stack: ..., a, b, c
1331 __ load_ptr( 0, rax); // load c
1332 __ load_ptr( 2, rcx); // load a
1333 __ store_ptr(2, rax); // store c in a
1334 __ push_ptr(rax); // push c
1335 // stack: ..., c, b, c, c
1336 __ load_ptr( 2, rax); // load b
1337 __ store_ptr(2, rcx); // store a in b
1338 // stack: ..., c, a, c, c
1339 __ store_ptr(1, rax); // store b in c
1340 // stack: ..., c, a, b, c
1341 }
1342
1343 void TemplateTable::dup2() {
1344 transition(vtos, vtos);
1345 // stack: ..., a, b
1346 __ load_ptr(1, rax); // load a
1347 __ push_ptr(rax); // push a
1348 __ load_ptr(1, rax); // load b
1349 __ push_ptr(rax); // push b
1350 // stack: ..., a, b, a, b
1351 }
1352
1353
1354 void TemplateTable::dup2_x1() {
1355 transition(vtos, vtos);
1356 // stack: ..., a, b, c
1357 __ load_ptr( 0, rcx); // load c
1358 __ load_ptr( 1, rax); // load b
1359 __ push_ptr(rax); // push b
1360 __ push_ptr(rcx); // push c
1361 // stack: ..., a, b, c, b, c
1362 __ store_ptr(3, rcx); // store c in b
1363 // stack: ..., a, c, c, b, c
1364 __ load_ptr( 4, rcx); // load a
1365 __ store_ptr(2, rcx); // store a in 2nd c
1366 // stack: ..., a, c, a, b, c
1367 __ store_ptr(4, rax); // store b in a
1368 // stack: ..., b, c, a, b, c
1369 }
1370
1371 void TemplateTable::dup2_x2() {
1372 transition(vtos, vtos);
1373 // stack: ..., a, b, c, d
1374 __ load_ptr( 0, rcx); // load d
1375 __ load_ptr( 1, rax); // load c
1376 __ push_ptr(rax); // push c
1377 __ push_ptr(rcx); // push d
1378 // stack: ..., a, b, c, d, c, d
1379 __ load_ptr( 4, rax); // load b
1380 __ store_ptr(2, rax); // store b in d
1381 __ store_ptr(4, rcx); // store d in b
1382 // stack: ..., a, d, c, b, c, d
1383 __ load_ptr( 5, rcx); // load a
1384 __ load_ptr( 3, rax); // load c
1385 __ store_ptr(3, rcx); // store a in c
1386 __ store_ptr(5, rax); // store c in a
1387 // stack: ..., c, d, a, b, c, d
1388 }
1389
1390 void TemplateTable::swap() {
1391 transition(vtos, vtos);
1392 // stack: ..., a, b
1393 __ load_ptr( 1, rcx); // load a
1394 __ load_ptr( 0, rax); // load b
1395 __ store_ptr(0, rcx); // store a in b
1396 __ store_ptr(1, rax); // store b in a
1397 // stack: ..., b, a
1398 }
1399
1400 void TemplateTable::iop2(Operation op) {
1401 transition(itos, itos);
1402 switch (op) {
1403 case add : __ pop_i(rdx); __ addl (rax, rdx); break;
1404 case sub : __ movl(rdx, rax); __ pop_i(rax); __ subl (rax, rdx); break;
1405 case mul : __ pop_i(rdx); __ imull(rax, rdx); break;
1406 case _and : __ pop_i(rdx); __ andl (rax, rdx); break;
1407 case _or : __ pop_i(rdx); __ orl (rax, rdx); break;
1408 case _xor : __ pop_i(rdx); __ xorl (rax, rdx); break;
1409 case shl : __ movl(rcx, rax); __ pop_i(rax); __ shll (rax); break;
1410 case shr : __ movl(rcx, rax); __ pop_i(rax); __ sarl (rax); break;
1411 case ushr : __ movl(rcx, rax); __ pop_i(rax); __ shrl (rax); break;
1412 default : ShouldNotReachHere();
1413 }
1414 }
1415
1416 void TemplateTable::lop2(Operation op) {
1417 transition(ltos, ltos);
1418 #ifdef _LP64
1419 switch (op) {
1420 case add : __ pop_l(rdx); __ addptr(rax, rdx); break;
1421 case sub : __ mov(rdx, rax); __ pop_l(rax); __ subptr(rax, rdx); break;
1422 case _and : __ pop_l(rdx); __ andptr(rax, rdx); break;
1423 case _or : __ pop_l(rdx); __ orptr (rax, rdx); break;
1424 case _xor : __ pop_l(rdx); __ xorptr(rax, rdx); break;
1425 default : ShouldNotReachHere();
1426 }
1427 #else
1428 __ pop_l(rbx, rcx);
1429 switch (op) {
1430 case add : __ addl(rax, rbx); __ adcl(rdx, rcx); break;
1431 case sub : __ subl(rbx, rax); __ sbbl(rcx, rdx);
1432 __ mov (rax, rbx); __ mov (rdx, rcx); break;
1433 case _and : __ andl(rax, rbx); __ andl(rdx, rcx); break;
1434 case _or : __ orl (rax, rbx); __ orl (rdx, rcx); break;
1435 case _xor : __ xorl(rax, rbx); __ xorl(rdx, rcx); break;
1436 default : ShouldNotReachHere();
1437 }
1438 #endif
1439 }
1440
1441 void TemplateTable::idiv() {
1442 transition(itos, itos);
1443 __ movl(rcx, rax);
1444 __ pop_i(rax);
1445 // Note: could xor rax and ecx and compare with (-1 ^ min_int). If
1446 // they are not equal, one could do a normal division (no correction
1447 // needed), which may speed up this implementation for the common case.
1448 // (see also JVM spec., p.243 & p.271)
1449 __ corrected_idivl(rcx);
1450 }
1451
1452 void TemplateTable::irem() {
1453 transition(itos, itos);
1454 __ movl(rcx, rax);
1455 __ pop_i(rax);
1456 // Note: could xor rax and ecx and compare with (-1 ^ min_int). If
1457 // they are not equal, one could do a normal division (no correction
1458 // needed), which may speed up this implementation for the common case.
1459 // (see also JVM spec., p.243 & p.271)
1460 __ corrected_idivl(rcx);
1461 __ movl(rax, rdx);
1462 }
1463
1464 void TemplateTable::lmul() {
1465 transition(ltos, ltos);
1466 #ifdef _LP64
1467 __ pop_l(rdx);
1468 __ imulq(rax, rdx);
1469 #else
1470 __ pop_l(rbx, rcx);
1471 __ push(rcx); __ push(rbx);
1472 __ push(rdx); __ push(rax);
1473 __ lmul(2 * wordSize, 0);
1474 __ addptr(rsp, 4 * wordSize); // take off temporaries
1475 #endif
1476 }
1477
1478 void TemplateTable::ldiv() {
1479 transition(ltos, ltos);
1480 #ifdef _LP64
1481 __ mov(rcx, rax);
1482 __ pop_l(rax);
1483 // generate explicit div0 check
1484 __ testq(rcx, rcx);
1485 __ jump_cc(Assembler::zero,
1486 ExternalAddress(Interpreter::_throw_ArithmeticException_entry));
1487 // Note: could xor rax and rcx and compare with (-1 ^ min_int). If
1488 // they are not equal, one could do a normal division (no correction
1489 // needed), which may speed up this implementation for the common case.
1490 // (see also JVM spec., p.243 & p.271)
1491 __ corrected_idivq(rcx); // kills rbx
1492 #else
1493 __ pop_l(rbx, rcx);
1494 __ push(rcx); __ push(rbx);
1495 __ push(rdx); __ push(rax);
1496 // check if y = 0
1497 __ orl(rax, rdx);
1498 __ jump_cc(Assembler::zero,
1499 ExternalAddress(Interpreter::_throw_ArithmeticException_entry));
1500 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::ldiv));
1501 __ addptr(rsp, 4 * wordSize); // take off temporaries
1502 #endif
1503 }
1504
1505 void TemplateTable::lrem() {
1506 transition(ltos, ltos);
1507 #ifdef _LP64
1508 __ mov(rcx, rax);
1509 __ pop_l(rax);
1510 __ testq(rcx, rcx);
1511 __ jump_cc(Assembler::zero,
1512 ExternalAddress(Interpreter::_throw_ArithmeticException_entry));
1513 // Note: could xor rax and rcx and compare with (-1 ^ min_int). If
1514 // they are not equal, one could do a normal division (no correction
1515 // needed), which may speed up this implementation for the common case.
1516 // (see also JVM spec., p.243 & p.271)
1517 __ corrected_idivq(rcx); // kills rbx
1518 __ mov(rax, rdx);
1519 #else
1520 __ pop_l(rbx, rcx);
1521 __ push(rcx); __ push(rbx);
1522 __ push(rdx); __ push(rax);
1523 // check if y = 0
1524 __ orl(rax, rdx);
1525 __ jump_cc(Assembler::zero,
1526 ExternalAddress(Interpreter::_throw_ArithmeticException_entry));
1527 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::lrem));
1528 __ addptr(rsp, 4 * wordSize);
1529 #endif
1530 }
1531
1532 void TemplateTable::lshl() {
1533 transition(itos, ltos);
1534 __ movl(rcx, rax); // get shift count
1535 #ifdef _LP64
1536 __ pop_l(rax); // get shift value
1537 __ shlq(rax);
1538 #else
1539 __ pop_l(rax, rdx); // get shift value
1540 __ lshl(rdx, rax);
1541 #endif
1542 }
1543
1544 void TemplateTable::lshr() {
1545 #ifdef _LP64
1546 transition(itos, ltos);
1547 __ movl(rcx, rax); // get shift count
1548 __ pop_l(rax); // get shift value
1549 __ sarq(rax);
1550 #else
1551 transition(itos, ltos);
1552 __ mov(rcx, rax); // get shift count
1553 __ pop_l(rax, rdx); // get shift value
1554 __ lshr(rdx, rax, true);
1555 #endif
1556 }
1557
1558 void TemplateTable::lushr() {
1559 transition(itos, ltos);
1560 #ifdef _LP64
1561 __ movl(rcx, rax); // get shift count
1562 __ pop_l(rax); // get shift value
1563 __ shrq(rax);
1564 #else
1565 __ mov(rcx, rax); // get shift count
1566 __ pop_l(rax, rdx); // get shift value
1567 __ lshr(rdx, rax);
1568 #endif
1569 }
1570
1571 void TemplateTable::fop2(Operation op) {
1572 transition(ftos, ftos);
1573
1574 if (UseSSE >= 1) {
1575 switch (op) {
1576 case add:
1577 __ addss(xmm0, at_rsp());
1578 __ addptr(rsp, Interpreter::stackElementSize);
1579 break;
1580 case sub:
1581 __ movflt(xmm1, xmm0);
1582 __ pop_f(xmm0);
1583 __ subss(xmm0, xmm1);
1584 break;
1585 case mul:
1586 __ mulss(xmm0, at_rsp());
1587 __ addptr(rsp, Interpreter::stackElementSize);
1588 break;
1589 case div:
1590 __ movflt(xmm1, xmm0);
1591 __ pop_f(xmm0);
1592 __ divss(xmm0, xmm1);
1593 break;
1594 case rem:
1595 // On x86_64 platforms the SharedRuntime::frem method is called to perform the
1596 // modulo operation. The frem method calls the function
1597 // double fmod(double x, double y) in math.h. The documentation of fmod states:
1598 // "If x or y is a NaN, a NaN is returned." without specifying what type of NaN
1599 // (signalling or quiet) is returned.
1600 //
1601 // On x86_32 platforms the FPU is used to perform the modulo operation. The
1602 // reason is that on 32-bit Windows the sign of modulo operations diverges from
1603 // what is considered the standard (e.g., -0.0f % -3.14f is 0.0f (and not -0.0f).
1604 // The fprem instruction used on x86_32 is functionally equivalent to
1605 // SharedRuntime::frem in that it returns a NaN.
1606 #ifdef _LP64
1607 __ movflt(xmm1, xmm0);
1608 __ pop_f(xmm0);
1609 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::frem), 2);
1610 #else
1611 __ push_f(xmm0);
1612 __ pop_f();
1613 __ fld_s(at_rsp());
1614 __ fremr(rax);
1615 __ f2ieee();
1616 __ pop(rax); // pop second operand off the stack
1617 __ push_f();
1618 __ pop_f(xmm0);
1619 #endif
1620 break;
1621 default:
1622 ShouldNotReachHere();
1623 break;
1624 }
1625 } else {
1626 #ifdef _LP64
1627 ShouldNotReachHere();
1628 #else
1629 switch (op) {
1630 case add: __ fadd_s (at_rsp()); break;
1631 case sub: __ fsubr_s(at_rsp()); break;
1632 case mul: __ fmul_s (at_rsp()); break;
1633 case div: __ fdivr_s(at_rsp()); break;
1634 case rem: __ fld_s (at_rsp()); __ fremr(rax); break;
1635 default : ShouldNotReachHere();
1636 }
1637 __ f2ieee();
1638 __ pop(rax); // pop second operand off the stack
1639 #endif // _LP64
1640 }
1641 }
1642
1643 void TemplateTable::dop2(Operation op) {
1644 transition(dtos, dtos);
1645 if (UseSSE >= 2) {
1646 switch (op) {
1647 case add:
1648 __ addsd(xmm0, at_rsp());
1649 __ addptr(rsp, 2 * Interpreter::stackElementSize);
1650 break;
1651 case sub:
1652 __ movdbl(xmm1, xmm0);
1653 __ pop_d(xmm0);
1654 __ subsd(xmm0, xmm1);
1655 break;
1656 case mul:
1657 __ mulsd(xmm0, at_rsp());
1658 __ addptr(rsp, 2 * Interpreter::stackElementSize);
1659 break;
1660 case div:
1661 __ movdbl(xmm1, xmm0);
1662 __ pop_d(xmm0);
1663 __ divsd(xmm0, xmm1);
1664 break;
1665 case rem:
1666 // Similar to fop2(), the modulo operation is performed using the
1667 // SharedRuntime::drem method (on x86_64 platforms) or using the
1668 // FPU (on x86_32 platforms) for the same reasons as mentioned in fop2().
1669 #ifdef _LP64
1670 __ movdbl(xmm1, xmm0);
1671 __ pop_d(xmm0);
1672 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::drem), 2);
1673 #else
1674 __ push_d(xmm0);
1675 __ pop_d();
1676 __ fld_d(at_rsp());
1677 __ fremr(rax);
1678 __ d2ieee();
1679 __ pop(rax);
1680 __ pop(rdx);
1681 __ push_d();
1682 __ pop_d(xmm0);
1683 #endif
1684 break;
1685 default:
1686 ShouldNotReachHere();
1687 break;
1688 }
1689 } else {
1690 #ifdef _LP64
1691 ShouldNotReachHere();
1692 #else
1693 switch (op) {
1694 case add: __ fadd_d (at_rsp()); break;
1695 case sub: __ fsubr_d(at_rsp()); break;
1696 case mul: {
1697 Label L_strict;
1698 Label L_join;
1699 const Address access_flags (rcx, Method::access_flags_offset());
1700 __ get_method(rcx);
1701 __ movl(rcx, access_flags);
1702 __ testl(rcx, JVM_ACC_STRICT);
1703 __ jccb(Assembler::notZero, L_strict);
1704 __ fmul_d (at_rsp());
1705 __ jmpb(L_join);
1706 __ bind(L_strict);
1707 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias1()));
1708 __ fmulp();
1709 __ fmul_d (at_rsp());
1710 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias2()));
1711 __ fmulp();
1712 __ bind(L_join);
1713 break;
1714 }
1715 case div: {
1716 Label L_strict;
1717 Label L_join;
1718 const Address access_flags (rcx, Method::access_flags_offset());
1719 __ get_method(rcx);
1720 __ movl(rcx, access_flags);
1721 __ testl(rcx, JVM_ACC_STRICT);
1722 __ jccb(Assembler::notZero, L_strict);
1723 __ fdivr_d(at_rsp());
1724 __ jmp(L_join);
1725 __ bind(L_strict);
1726 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias1()));
1727 __ fmul_d (at_rsp());
1728 __ fdivrp();
1729 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias2()));
1730 __ fmulp();
1731 __ bind(L_join);
1732 break;
1733 }
1734 case rem: __ fld_d (at_rsp()); __ fremr(rax); break;
1735 default : ShouldNotReachHere();
1736 }
1737 __ d2ieee();
1738 // Pop double precision number from rsp.
1739 __ pop(rax);
1740 __ pop(rdx);
1741 #endif
1742 }
1743 }
1744
1745 void TemplateTable::ineg() {
1746 transition(itos, itos);
1747 __ negl(rax);
1748 }
1749
1750 void TemplateTable::lneg() {
1751 transition(ltos, ltos);
1752 LP64_ONLY(__ negq(rax));
1753 NOT_LP64(__ lneg(rdx, rax));
1754 }
1755
1756 // Note: 'double' and 'long long' have 32-bits alignment on x86.
1757 static jlong* double_quadword(jlong *adr, jlong lo, jlong hi) {
1758 // Use the expression (adr)&(~0xF) to provide 128-bits aligned address
1759 // of 128-bits operands for SSE instructions.
1760 jlong *operand = (jlong*)(((intptr_t)adr)&((intptr_t)(~0xF)));
1761 // Store the value to a 128-bits operand.
1762 operand[0] = lo;
1763 operand[1] = hi;
1764 return operand;
1765 }
1766
1767 // Buffer for 128-bits masks used by SSE instructions.
1768 static jlong float_signflip_pool[2*2];
1769 static jlong double_signflip_pool[2*2];
1770
1771 void TemplateTable::fneg() {
1772 transition(ftos, ftos);
1773 if (UseSSE >= 1) {
1774 static jlong *float_signflip = double_quadword(&float_signflip_pool[1], CONST64(0x8000000080000000), CONST64(0x8000000080000000));
1775 __ xorps(xmm0, ExternalAddress((address) float_signflip));
1776 } else {
1777 LP64_ONLY(ShouldNotReachHere());
1778 NOT_LP64(__ fchs());
1779 }
1780 }
1781
1782 void TemplateTable::dneg() {
1783 transition(dtos, dtos);
1784 if (UseSSE >= 2) {
1785 static jlong *double_signflip =
1786 double_quadword(&double_signflip_pool[1], CONST64(0x8000000000000000), CONST64(0x8000000000000000));
1787 __ xorpd(xmm0, ExternalAddress((address) double_signflip));
1788 } else {
1789 #ifdef _LP64
1790 ShouldNotReachHere();
1791 #else
1792 __ fchs();
1793 #endif
1794 }
1795 }
1796
1797 void TemplateTable::iinc() {
1798 transition(vtos, vtos);
1799 __ load_signed_byte(rdx, at_bcp(2)); // get constant
1800 locals_index(rbx);
1801 __ addl(iaddress(rbx), rdx);
1802 }
1803
1804 void TemplateTable::wide_iinc() {
1805 transition(vtos, vtos);
1806 __ movl(rdx, at_bcp(4)); // get constant
1807 locals_index_wide(rbx);
1808 __ bswapl(rdx); // swap bytes & sign-extend constant
1809 __ sarl(rdx, 16);
1810 __ addl(iaddress(rbx), rdx);
1811 // Note: should probably use only one movl to get both
1812 // the index and the constant -> fix this
1813 }
1814
1815 void TemplateTable::convert() {
1816 #ifdef _LP64
1817 // Checking
1818 #ifdef ASSERT
1819 {
1820 TosState tos_in = ilgl;
1821 TosState tos_out = ilgl;
1822 switch (bytecode()) {
1823 case Bytecodes::_i2l: // fall through
1824 case Bytecodes::_i2f: // fall through
1825 case Bytecodes::_i2d: // fall through
1826 case Bytecodes::_i2b: // fall through
1827 case Bytecodes::_i2c: // fall through
1828 case Bytecodes::_i2s: tos_in = itos; break;
1829 case Bytecodes::_l2i: // fall through
1830 case Bytecodes::_l2f: // fall through
1831 case Bytecodes::_l2d: tos_in = ltos; break;
1832 case Bytecodes::_f2i: // fall through
1833 case Bytecodes::_f2l: // fall through
1834 case Bytecodes::_f2d: tos_in = ftos; break;
1835 case Bytecodes::_d2i: // fall through
1836 case Bytecodes::_d2l: // fall through
1837 case Bytecodes::_d2f: tos_in = dtos; break;
1838 default : ShouldNotReachHere();
1839 }
1840 switch (bytecode()) {
1841 case Bytecodes::_l2i: // fall through
1842 case Bytecodes::_f2i: // fall through
1843 case Bytecodes::_d2i: // fall through
1844 case Bytecodes::_i2b: // fall through
1845 case Bytecodes::_i2c: // fall through
1846 case Bytecodes::_i2s: tos_out = itos; break;
1847 case Bytecodes::_i2l: // fall through
1848 case Bytecodes::_f2l: // fall through
1849 case Bytecodes::_d2l: tos_out = ltos; break;
1850 case Bytecodes::_i2f: // fall through
1851 case Bytecodes::_l2f: // fall through
1852 case Bytecodes::_d2f: tos_out = ftos; break;
1853 case Bytecodes::_i2d: // fall through
1854 case Bytecodes::_l2d: // fall through
1855 case Bytecodes::_f2d: tos_out = dtos; break;
1856 default : ShouldNotReachHere();
1857 }
1858 transition(tos_in, tos_out);
1859 }
1860 #endif // ASSERT
1861
1862 static const int64_t is_nan = 0x8000000000000000L;
1863
1864 // Conversion
1865 switch (bytecode()) {
1866 case Bytecodes::_i2l:
1867 __ movslq(rax, rax);
1868 break;
1869 case Bytecodes::_i2f:
1870 __ cvtsi2ssl(xmm0, rax);
1871 break;
1872 case Bytecodes::_i2d:
1873 __ cvtsi2sdl(xmm0, rax);
1874 break;
1875 case Bytecodes::_i2b:
1876 __ movsbl(rax, rax);
1877 break;
1878 case Bytecodes::_i2c:
1879 __ movzwl(rax, rax);
1880 break;
1881 case Bytecodes::_i2s:
1882 __ movswl(rax, rax);
1883 break;
1884 case Bytecodes::_l2i:
1885 __ movl(rax, rax);
1886 break;
1887 case Bytecodes::_l2f:
1888 __ cvtsi2ssq(xmm0, rax);
1889 break;
1890 case Bytecodes::_l2d:
1891 __ cvtsi2sdq(xmm0, rax);
1892 break;
1893 case Bytecodes::_f2i:
1894 {
1895 Label L;
1896 __ cvttss2sil(rax, xmm0);
1897 __ cmpl(rax, 0x80000000); // NaN or overflow/underflow?
1898 __ jcc(Assembler::notEqual, L);
1899 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2i), 1);
1900 __ bind(L);
1901 }
1902 break;
1903 case Bytecodes::_f2l:
1904 {
1905 Label L;
1906 __ cvttss2siq(rax, xmm0);
1907 // NaN or overflow/underflow?
1908 __ cmp64(rax, ExternalAddress((address) &is_nan));
1909 __ jcc(Assembler::notEqual, L);
1910 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2l), 1);
1911 __ bind(L);
1912 }
1913 break;
1914 case Bytecodes::_f2d:
1915 __ cvtss2sd(xmm0, xmm0);
1916 break;
1917 case Bytecodes::_d2i:
1918 {
1919 Label L;
1920 __ cvttsd2sil(rax, xmm0);
1921 __ cmpl(rax, 0x80000000); // NaN or overflow/underflow?
1922 __ jcc(Assembler::notEqual, L);
1923 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2i), 1);
1924 __ bind(L);
1925 }
1926 break;
1927 case Bytecodes::_d2l:
1928 {
1929 Label L;
1930 __ cvttsd2siq(rax, xmm0);
1931 // NaN or overflow/underflow?
1932 __ cmp64(rax, ExternalAddress((address) &is_nan));
1933 __ jcc(Assembler::notEqual, L);
1934 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2l), 1);
1935 __ bind(L);
1936 }
1937 break;
1938 case Bytecodes::_d2f:
1939 __ cvtsd2ss(xmm0, xmm0);
1940 break;
1941 default:
1942 ShouldNotReachHere();
1943 }
1944 #else
1945 // Checking
1946 #ifdef ASSERT
1947 { TosState tos_in = ilgl;
1948 TosState tos_out = ilgl;
1949 switch (bytecode()) {
1950 case Bytecodes::_i2l: // fall through
1951 case Bytecodes::_i2f: // fall through
1952 case Bytecodes::_i2d: // fall through
1953 case Bytecodes::_i2b: // fall through
1954 case Bytecodes::_i2c: // fall through
1955 case Bytecodes::_i2s: tos_in = itos; break;
1956 case Bytecodes::_l2i: // fall through
1957 case Bytecodes::_l2f: // fall through
1958 case Bytecodes::_l2d: tos_in = ltos; break;
1959 case Bytecodes::_f2i: // fall through
1960 case Bytecodes::_f2l: // fall through
1961 case Bytecodes::_f2d: tos_in = ftos; break;
1962 case Bytecodes::_d2i: // fall through
1963 case Bytecodes::_d2l: // fall through
1964 case Bytecodes::_d2f: tos_in = dtos; break;
1965 default : ShouldNotReachHere();
1966 }
1967 switch (bytecode()) {
1968 case Bytecodes::_l2i: // fall through
1969 case Bytecodes::_f2i: // fall through
1970 case Bytecodes::_d2i: // fall through
1971 case Bytecodes::_i2b: // fall through
1972 case Bytecodes::_i2c: // fall through
1973 case Bytecodes::_i2s: tos_out = itos; break;
1974 case Bytecodes::_i2l: // fall through
1975 case Bytecodes::_f2l: // fall through
1976 case Bytecodes::_d2l: tos_out = ltos; break;
1977 case Bytecodes::_i2f: // fall through
1978 case Bytecodes::_l2f: // fall through
1979 case Bytecodes::_d2f: tos_out = ftos; break;
1980 case Bytecodes::_i2d: // fall through
1981 case Bytecodes::_l2d: // fall through
1982 case Bytecodes::_f2d: tos_out = dtos; break;
1983 default : ShouldNotReachHere();
1984 }
1985 transition(tos_in, tos_out);
1986 }
1987 #endif // ASSERT
1988
1989 // Conversion
1990 // (Note: use push(rcx)/pop(rcx) for 1/2-word stack-ptr manipulation)
1991 switch (bytecode()) {
1992 case Bytecodes::_i2l:
1993 __ extend_sign(rdx, rax);
1994 break;
1995 case Bytecodes::_i2f:
1996 if (UseSSE >= 1) {
1997 __ cvtsi2ssl(xmm0, rax);
1998 } else {
1999 __ push(rax); // store int on tos
2000 __ fild_s(at_rsp()); // load int to ST0
2001 __ f2ieee(); // truncate to float size
2002 __ pop(rcx); // adjust rsp
2003 }
2004 break;
2005 case Bytecodes::_i2d:
2006 if (UseSSE >= 2) {
2007 __ cvtsi2sdl(xmm0, rax);
2008 } else {
2009 __ push(rax); // add one slot for d2ieee()
2010 __ push(rax); // store int on tos
2011 __ fild_s(at_rsp()); // load int to ST0
2012 __ d2ieee(); // truncate to double size
2013 __ pop(rcx); // adjust rsp
2014 __ pop(rcx);
2015 }
2016 break;
2017 case Bytecodes::_i2b:
2018 __ shll(rax, 24); // truncate upper 24 bits
2019 __ sarl(rax, 24); // and sign-extend byte
2020 LP64_ONLY(__ movsbl(rax, rax));
2021 break;
2022 case Bytecodes::_i2c:
2023 __ andl(rax, 0xFFFF); // truncate upper 16 bits
2024 LP64_ONLY(__ movzwl(rax, rax));
2025 break;
2026 case Bytecodes::_i2s:
2027 __ shll(rax, 16); // truncate upper 16 bits
2028 __ sarl(rax, 16); // and sign-extend short
2029 LP64_ONLY(__ movswl(rax, rax));
2030 break;
2031 case Bytecodes::_l2i:
2032 /* nothing to do */
2033 break;
2034 case Bytecodes::_l2f:
2035 // On 64-bit platforms, the cvtsi2ssq instruction is used to convert
2036 // 64-bit long values to floats. On 32-bit platforms it is not possible
2037 // to use that instruction with 64-bit operands, therefore the FPU is
2038 // used to perform the conversion.
2039 __ push(rdx); // store long on tos
2040 __ push(rax);
2041 __ fild_d(at_rsp()); // load long to ST0
2042 __ f2ieee(); // truncate to float size
2043 __ pop(rcx); // adjust rsp
2044 __ pop(rcx);
2045 if (UseSSE >= 1) {
2046 __ push_f();
2047 __ pop_f(xmm0);
2048 }
2049 break;
2050 case Bytecodes::_l2d:
2051 // On 32-bit platforms the FPU is used for conversion because on
2052 // 32-bit platforms it is not not possible to use the cvtsi2sdq
2053 // instruction with 64-bit operands.
2054 __ push(rdx); // store long on tos
2055 __ push(rax);
2056 __ fild_d(at_rsp()); // load long to ST0
2057 __ d2ieee(); // truncate to double size
2058 __ pop(rcx); // adjust rsp
2059 __ pop(rcx);
2060 if (UseSSE >= 2) {
2061 __ push_d();
2062 __ pop_d(xmm0);
2063 }
2064 break;
2065 case Bytecodes::_f2i:
2066 // SharedRuntime::f2i does not differentiate between sNaNs and qNaNs
2067 // as it returns 0 for any NaN.
2068 if (UseSSE >= 1) {
2069 __ push_f(xmm0);
2070 } else {
2071 __ push(rcx); // reserve space for argument
2072 __ fstp_s(at_rsp()); // pass float argument on stack
2073 }
2074 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2i), 1);
2075 break;
2076 case Bytecodes::_f2l:
2077 // SharedRuntime::f2l does not differentiate between sNaNs and qNaNs
2078 // as it returns 0 for any NaN.
2079 if (UseSSE >= 1) {
2080 __ push_f(xmm0);
2081 } else {
2082 __ push(rcx); // reserve space for argument
2083 __ fstp_s(at_rsp()); // pass float argument on stack
2084 }
2085 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2l), 1);
2086 break;
2087 case Bytecodes::_f2d:
2088 if (UseSSE < 1) {
2089 /* nothing to do */
2090 } else if (UseSSE == 1) {
2091 __ push_f(xmm0);
2092 __ pop_f();
2093 } else { // UseSSE >= 2
2094 __ cvtss2sd(xmm0, xmm0);
2095 }
2096 break;
2097 case Bytecodes::_d2i:
2098 if (UseSSE >= 2) {
2099 __ push_d(xmm0);
2100 } else {
2101 __ push(rcx); // reserve space for argument
2102 __ push(rcx);
2103 __ fstp_d(at_rsp()); // pass double argument on stack
2104 }
2105 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2i), 2);
2106 break;
2107 case Bytecodes::_d2l:
2108 if (UseSSE >= 2) {
2109 __ push_d(xmm0);
2110 } else {
2111 __ push(rcx); // reserve space for argument
2112 __ push(rcx);
2113 __ fstp_d(at_rsp()); // pass double argument on stack
2114 }
2115 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2l), 2);
2116 break;
2117 case Bytecodes::_d2f:
2118 if (UseSSE <= 1) {
2119 __ push(rcx); // reserve space for f2ieee()
2120 __ f2ieee(); // truncate to float size
2121 __ pop(rcx); // adjust rsp
2122 if (UseSSE == 1) {
2123 // The cvtsd2ss instruction is not available if UseSSE==1, therefore
2124 // the conversion is performed using the FPU in this case.
2125 __ push_f();
2126 __ pop_f(xmm0);
2127 }
2128 } else { // UseSSE >= 2
2129 __ cvtsd2ss(xmm0, xmm0);
2130 }
2131 break;
2132 default :
2133 ShouldNotReachHere();
2134 }
2135 #endif
2136 }
2137
2138 void TemplateTable::lcmp() {
2139 transition(ltos, itos);
2140 #ifdef _LP64
2141 Label done;
2142 __ pop_l(rdx);
2143 __ cmpq(rdx, rax);
2144 __ movl(rax, -1);
2145 __ jccb(Assembler::less, done);
2146 __ setb(Assembler::notEqual, rax);
2147 __ movzbl(rax, rax);
2148 __ bind(done);
2149 #else
2150
2151 // y = rdx:rax
2152 __ pop_l(rbx, rcx); // get x = rcx:rbx
2153 __ lcmp2int(rcx, rbx, rdx, rax);// rcx := cmp(x, y)
2154 __ mov(rax, rcx);
2155 #endif
2156 }
2157
2158 void TemplateTable::float_cmp(bool is_float, int unordered_result) {
2159 if ((is_float && UseSSE >= 1) ||
2160 (!is_float && UseSSE >= 2)) {
2161 Label done;
2162 if (is_float) {
2163 // XXX get rid of pop here, use ... reg, mem32
2164 __ pop_f(xmm1);
2165 __ ucomiss(xmm1, xmm0);
2166 } else {
2167 // XXX get rid of pop here, use ... reg, mem64
2168 __ pop_d(xmm1);
2169 __ ucomisd(xmm1, xmm0);
2170 }
2171 if (unordered_result < 0) {
2172 __ movl(rax, -1);
2173 __ jccb(Assembler::parity, done);
2174 __ jccb(Assembler::below, done);
2175 __ setb(Assembler::notEqual, rdx);
2176 __ movzbl(rax, rdx);
2177 } else {
2178 __ movl(rax, 1);
2179 __ jccb(Assembler::parity, done);
2180 __ jccb(Assembler::above, done);
2181 __ movl(rax, 0);
2182 __ jccb(Assembler::equal, done);
2183 __ decrementl(rax);
2184 }
2185 __ bind(done);
2186 } else {
2187 #ifdef _LP64
2188 ShouldNotReachHere();
2189 #else
2190 if (is_float) {
2191 __ fld_s(at_rsp());
2192 } else {
2193 __ fld_d(at_rsp());
2194 __ pop(rdx);
2195 }
2196 __ pop(rcx);
2197 __ fcmp2int(rax, unordered_result < 0);
2198 #endif // _LP64
2199 }
2200 }
2201
2202 void TemplateTable::branch(bool is_jsr, bool is_wide) {
2203 __ get_method(rcx); // rcx holds method
2204 __ profile_taken_branch(rax, rbx); // rax holds updated MDP, rbx
2205 // holds bumped taken count
2206
2207 const ByteSize be_offset = MethodCounters::backedge_counter_offset() +
2208 InvocationCounter::counter_offset();
2209 const ByteSize inv_offset = MethodCounters::invocation_counter_offset() +
2210 InvocationCounter::counter_offset();
2211
2212 // Load up edx with the branch displacement
2213 if (is_wide) {
2214 __ movl(rdx, at_bcp(1));
2215 } else {
2216 __ load_signed_short(rdx, at_bcp(1));
2217 }
2218 __ bswapl(rdx);
2219
2220 if (!is_wide) {
2221 __ sarl(rdx, 16);
2222 }
2223 LP64_ONLY(__ movl2ptr(rdx, rdx));
2224
2225 // Handle all the JSR stuff here, then exit.
2226 // It's much shorter and cleaner than intermingling with the non-JSR
2227 // normal-branch stuff occurring below.
2228 if (is_jsr) {
2229 // Pre-load the next target bytecode into rbx
2230 __ load_unsigned_byte(rbx, Address(rbcp, rdx, Address::times_1, 0));
2231
2232 // compute return address as bci in rax
2233 __ lea(rax, at_bcp((is_wide ? 5 : 3) -
2234 in_bytes(ConstMethod::codes_offset())));
2235 __ subptr(rax, Address(rcx, Method::const_offset()));
2236 // Adjust the bcp in r13 by the displacement in rdx
2237 __ addptr(rbcp, rdx);
2238 // jsr returns atos that is not an oop
2239 __ push_i(rax);
2240 __ dispatch_only(vtos, true);
2241 return;
2242 }
2243
2244 // Normal (non-jsr) branch handling
2245
2246 // Adjust the bcp in r13 by the displacement in rdx
2247 __ addptr(rbcp, rdx);
2248
2249 assert(UseLoopCounter || !UseOnStackReplacement,
2250 "on-stack-replacement requires loop counters");
2251 Label backedge_counter_overflow;
2252 Label profile_method;
2253 Label dispatch;
2254 if (UseLoopCounter) {
2255 // increment backedge counter for backward branches
2256 // rax: MDO
2257 // rbx: MDO bumped taken-count
2258 // rcx: method
2259 // rdx: target offset
2260 // r13: target bcp
2261 // r14: locals pointer
2262 __ testl(rdx, rdx); // check if forward or backward branch
2263 __ jcc(Assembler::positive, dispatch); // count only if backward branch
2264
2265 // check if MethodCounters exists
2266 Label has_counters;
2267 __ movptr(rax, Address(rcx, Method::method_counters_offset()));
2268 __ testptr(rax, rax);
2269 __ jcc(Assembler::notZero, has_counters);
2270 __ push(rdx);
2271 __ push(rcx);
2272 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::build_method_counters),
2273 rcx);
2274 __ pop(rcx);
2275 __ pop(rdx);
2276 __ movptr(rax, Address(rcx, Method::method_counters_offset()));
2277 __ testptr(rax, rax);
2278 __ jcc(Assembler::zero, dispatch);
2279 __ bind(has_counters);
2280
2281 if (TieredCompilation) {
2282 Label no_mdo;
2283 int increment = InvocationCounter::count_increment;
2284 if (ProfileInterpreter) {
2285 // Are we profiling?
2286 __ movptr(rbx, Address(rcx, in_bytes(Method::method_data_offset())));
2287 __ testptr(rbx, rbx);
2288 __ jccb(Assembler::zero, no_mdo);
2289 // Increment the MDO backedge counter
2290 const Address mdo_backedge_counter(rbx, in_bytes(MethodData::backedge_counter_offset()) +
2291 in_bytes(InvocationCounter::counter_offset()));
2292 const Address mask(rbx, in_bytes(MethodData::backedge_mask_offset()));
2293 __ increment_mask_and_jump(mdo_backedge_counter, increment, mask, rax, false, Assembler::zero,
2294 UseOnStackReplacement ? &backedge_counter_overflow : NULL);
2295 __ jmp(dispatch);
2296 }
2297 __ bind(no_mdo);
2298 // Increment backedge counter in MethodCounters*
2299 __ movptr(rcx, Address(rcx, Method::method_counters_offset()));
2300 const Address mask(rcx, in_bytes(MethodCounters::backedge_mask_offset()));
2301 __ increment_mask_and_jump(Address(rcx, be_offset), increment, mask,
2302 rax, false, Assembler::zero,
2303 UseOnStackReplacement ? &backedge_counter_overflow : NULL);
2304 } else { // not TieredCompilation
2305 // increment counter
2306 __ movptr(rcx, Address(rcx, Method::method_counters_offset()));
2307 __ movl(rax, Address(rcx, be_offset)); // load backedge counter
2308 __ incrementl(rax, InvocationCounter::count_increment); // increment counter
2309 __ movl(Address(rcx, be_offset), rax); // store counter
2310
2311 __ movl(rax, Address(rcx, inv_offset)); // load invocation counter
2312
2313 __ andl(rax, InvocationCounter::count_mask_value); // and the status bits
2314 __ addl(rax, Address(rcx, be_offset)); // add both counters
2315
2316 if (ProfileInterpreter) {
2317 // Test to see if we should create a method data oop
2318 __ cmp32(rax, Address(rcx, in_bytes(MethodCounters::interpreter_profile_limit_offset())));
2319 __ jcc(Assembler::less, dispatch);
2320
2321 // if no method data exists, go to profile method
2322 __ test_method_data_pointer(rax, profile_method);
2323
2324 if (UseOnStackReplacement) {
2325 // check for overflow against rbx which is the MDO taken count
2326 __ cmp32(rbx, Address(rcx, in_bytes(MethodCounters::interpreter_backward_branch_limit_offset())));
2327 __ jcc(Assembler::below, dispatch);
2328
2329 // When ProfileInterpreter is on, the backedge_count comes
2330 // from the MethodData*, which value does not get reset on
2331 // the call to frequency_counter_overflow(). To avoid
2332 // excessive calls to the overflow routine while the method is
2333 // being compiled, add a second test to make sure the overflow
2334 // function is called only once every overflow_frequency.
2335 const int overflow_frequency = 1024;
2336 __ andl(rbx, overflow_frequency - 1);
2337 __ jcc(Assembler::zero, backedge_counter_overflow);
2338
2339 }
2340 } else {
2341 if (UseOnStackReplacement) {
2342 // check for overflow against rax, which is the sum of the
2343 // counters
2344 __ cmp32(rax, Address(rcx, in_bytes(MethodCounters::interpreter_backward_branch_limit_offset())));
2345 __ jcc(Assembler::aboveEqual, backedge_counter_overflow);
2346
2347 }
2348 }
2349 }
2350 __ bind(dispatch);
2351 }
2352
2353 // Pre-load the next target bytecode into rbx
2354 __ load_unsigned_byte(rbx, Address(rbcp, 0));
2355
2356 // continue with the bytecode @ target
2357 // rax: return bci for jsr's, unused otherwise
2358 // rbx: target bytecode
2359 // r13: target bcp
2360 __ dispatch_only(vtos, true);
2361
2362 if (UseLoopCounter) {
2363 if (ProfileInterpreter) {
2364 // Out-of-line code to allocate method data oop.
2365 __ bind(profile_method);
2366 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
2367 __ set_method_data_pointer_for_bcp();
2368 __ jmp(dispatch);
2369 }
2370
2371 if (UseOnStackReplacement) {
2372 // invocation counter overflow
2373 __ bind(backedge_counter_overflow);
2374 __ negptr(rdx);
2375 __ addptr(rdx, rbcp); // branch bcp
2376 // IcoResult frequency_counter_overflow([JavaThread*], address branch_bcp)
2377 __ call_VM(noreg,
2378 CAST_FROM_FN_PTR(address,
2379 InterpreterRuntime::frequency_counter_overflow),
2380 rdx);
2381
2382 // rax: osr nmethod (osr ok) or NULL (osr not possible)
2383 // rdx: scratch
2384 // r14: locals pointer
2385 // r13: bcp
2386 __ testptr(rax, rax); // test result
2387 __ jcc(Assembler::zero, dispatch); // no osr if null
2388 // nmethod may have been invalidated (VM may block upon call_VM return)
2389 __ cmpb(Address(rax, nmethod::state_offset()), nmethod::in_use);
2390 __ jcc(Assembler::notEqual, dispatch);
2391
2392 // We have the address of an on stack replacement routine in rax.
2393 // In preparation of invoking it, first we must migrate the locals
2394 // and monitors from off the interpreter frame on the stack.
2395 // Ensure to save the osr nmethod over the migration call,
2396 // it will be preserved in rbx.
2397 __ mov(rbx, rax);
2398
2399 NOT_LP64(__ get_thread(rcx));
2400
2401 call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_begin));
2402
2403 // rax is OSR buffer, move it to expected parameter location
2404 LP64_ONLY(__ mov(j_rarg0, rax));
2405 NOT_LP64(__ mov(rcx, rax));
2406 // We use j_rarg definitions here so that registers don't conflict as parameter
2407 // registers change across platforms as we are in the midst of a calling
2408 // sequence to the OSR nmethod and we don't want collision. These are NOT parameters.
2409
2410 const Register retaddr = LP64_ONLY(j_rarg2) NOT_LP64(rdi);
2411 const Register sender_sp = LP64_ONLY(j_rarg1) NOT_LP64(rdx);
2412
2413 // pop the interpreter frame
2414 __ movptr(sender_sp, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp
2415 __ leave(); // remove frame anchor
2416 __ pop(retaddr); // get return address
2417 __ mov(rsp, sender_sp); // set sp to sender sp
2418 // Ensure compiled code always sees stack at proper alignment
2419 __ andptr(rsp, -(StackAlignmentInBytes));
2420
2421 // unlike x86 we need no specialized return from compiled code
2422 // to the interpreter or the call stub.
2423
2424 // push the return address
2425 __ push(retaddr);
2426
2427 // and begin the OSR nmethod
2428 __ jmp(Address(rbx, nmethod::osr_entry_point_offset()));
2429 }
2430 }
2431 }
2432
2433 void TemplateTable::if_0cmp(Condition cc) {
2434 transition(itos, vtos);
2435 // assume branch is more often taken than not (loops use backward branches)
2436 Label not_taken;
2437 __ testl(rax, rax);
2438 __ jcc(j_not(cc), not_taken);
2439 branch(false, false);
2440 __ bind(not_taken);
2441 __ profile_not_taken_branch(rax);
2442 }
2443
2444 void TemplateTable::if_icmp(Condition cc) {
2445 transition(itos, vtos);
2446 // assume branch is more often taken than not (loops use backward branches)
2447 Label not_taken;
2448 __ pop_i(rdx);
2449 __ cmpl(rdx, rax);
2450 __ jcc(j_not(cc), not_taken);
2451 branch(false, false);
2452 __ bind(not_taken);
2453 __ profile_not_taken_branch(rax);
2454 }
2455
2456 void TemplateTable::if_nullcmp(Condition cc) {
2457 transition(atos, vtos);
2458 // assume branch is more often taken than not (loops use backward branches)
2459 Label not_taken;
2460 __ testptr(rax, rax);
2461 __ jcc(j_not(cc), not_taken);
2462 branch(false, false);
2463 __ bind(not_taken);
2464 __ profile_not_taken_branch(rax);
2465 }
2466
2467 void TemplateTable::if_acmp(Condition cc) {
2468 transition(atos, vtos);
2469 // assume branch is more often taken than not (loops use backward branches)
2470 Label taken, not_taken;
2471 __ pop_ptr(rdx);
2472
2473 const int is_value_mask = markOopDesc::always_locked_pattern;
2474 if (EnableValhalla && ACmpOnValues == 3) {
2475 __ cmpoop(rdx, rax);
2476 __ jcc(Assembler::equal, (cc == equal) ? taken : not_taken);
2477
2478 // might be substitutable, test if either rax or rdx is null
2479 __ movptr(rbx, rdx);
2480 __ andptr(rbx, rax);
2481 __ testptr(rbx, rbx);
2482 __ jcc(Assembler::zero, (cc == equal) ? not_taken : taken);
2483
2484 // and both are values ?
2485 __ movptr(rbx, Address(rdx, oopDesc::mark_offset_in_bytes()));
2486 __ andptr(rbx, is_value_mask);
2487 __ movptr(rcx, Address(rax, oopDesc::mark_offset_in_bytes()));
2488 __ andptr(rbx, is_value_mask);
2489 __ andptr(rbx, rcx);
2490 __ cmpl(rbx, is_value_mask);
2491 __ jcc(Assembler::notEqual, (cc == equal) ? not_taken : taken);
2492
2493 // same value klass ?
2494 __ load_metadata(rbx, rdx);
2495 __ load_metadata(rcx, rax);
2496 __ cmpptr(rbx, rcx);
2497 __ jcc(Assembler::notEqual, (cc == equal) ? not_taken : taken);
2498
2499 // Know both are the same type, let's test for substitutability...
2500 if (cc == equal) {
2501 invoke_is_substitutable(rax, rdx, taken, not_taken);
2502 } else {
2503 invoke_is_substitutable(rax, rdx, not_taken, taken);
2504 }
2505 __ stop("Not reachable");
2506 }
2507
2508
2509 if (EnableValhalla && ACmpOnValues == 1) {
2510 Label is_null;
2511 __ testptr(rdx, rdx);
2512 __ jcc(Assembler::zero, is_null);
2513 __ movptr(rbx, Address(rdx, oopDesc::mark_offset_in_bytes()));
2514 __ andptr(rbx, is_value_mask);
2515 __ cmpl(rbx, is_value_mask);
2516 __ setb(Assembler::equal, rbx);
2517 __ movzbl(rbx, rbx);
2518 __ orptr(rdx, rbx);
2519 __ bind(is_null);
2520 }
2521
2522 __ cmpoop(rdx, rax);
2523
2524 if (EnableValhalla && ACmpOnValues == 2) {
2525 __ jcc(Assembler::notEqual, (cc == not_equal) ? taken : not_taken);
2526 __ testptr(rdx, rdx);
2527 __ jcc(Assembler::zero, (cc == equal) ? taken : not_taken);
2528 __ movptr(rbx, Address(rdx, oopDesc::mark_offset_in_bytes()));
2529 __ andptr(rbx, is_value_mask);
2530 __ cmpl(rbx, is_value_mask);
2531 cc = (cc == equal) ? not_equal : equal;
2532 }
2533
2534 __ jcc(j_not(cc), not_taken);
2535 __ bind(taken);
2536 branch(false, false);
2537 __ bind(not_taken);
2538 __ profile_not_taken_branch(rax);
2539 }
2540
2541 void TemplateTable::invoke_is_substitutable(Register aobj, Register bobj,
2542 Label& is_subst, Label& not_subst) {
2543 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::is_substitutable), aobj, bobj);
2544 // Restored...rax answer, jmp to outcome...
2545 __ testl(rax, rax);
2546 __ jcc(Assembler::zero, not_subst);
2547 __ jmp(is_subst);
2548 }
2549
2550 void TemplateTable::ret() {
2551 transition(vtos, vtos);
2552 locals_index(rbx);
2553 LP64_ONLY(__ movslq(rbx, iaddress(rbx))); // get return bci, compute return bcp
2554 NOT_LP64(__ movptr(rbx, iaddress(rbx)));
2555 __ profile_ret(rbx, rcx);
2556 __ get_method(rax);
2557 __ movptr(rbcp, Address(rax, Method::const_offset()));
2558 __ lea(rbcp, Address(rbcp, rbx, Address::times_1,
2559 ConstMethod::codes_offset()));
2560 __ dispatch_next(vtos, 0, true);
2561 }
2562
2563 void TemplateTable::wide_ret() {
2564 transition(vtos, vtos);
2565 locals_index_wide(rbx);
2566 __ movptr(rbx, aaddress(rbx)); // get return bci, compute return bcp
2567 __ profile_ret(rbx, rcx);
2568 __ get_method(rax);
2569 __ movptr(rbcp, Address(rax, Method::const_offset()));
2570 __ lea(rbcp, Address(rbcp, rbx, Address::times_1, ConstMethod::codes_offset()));
2571 __ dispatch_next(vtos, 0, true);
2572 }
2573
2574 void TemplateTable::tableswitch() {
2575 Label default_case, continue_execution;
2576 transition(itos, vtos);
2577
2578 // align r13/rsi
2579 __ lea(rbx, at_bcp(BytesPerInt));
2580 __ andptr(rbx, -BytesPerInt);
2581 // load lo & hi
2582 __ movl(rcx, Address(rbx, BytesPerInt));
2583 __ movl(rdx, Address(rbx, 2 * BytesPerInt));
2584 __ bswapl(rcx);
2585 __ bswapl(rdx);
2586 // check against lo & hi
2587 __ cmpl(rax, rcx);
2588 __ jcc(Assembler::less, default_case);
2589 __ cmpl(rax, rdx);
2590 __ jcc(Assembler::greater, default_case);
2591 // lookup dispatch offset
2592 __ subl(rax, rcx);
2593 __ movl(rdx, Address(rbx, rax, Address::times_4, 3 * BytesPerInt));
2594 __ profile_switch_case(rax, rbx, rcx);
2595 // continue execution
2596 __ bind(continue_execution);
2597 __ bswapl(rdx);
2598 LP64_ONLY(__ movl2ptr(rdx, rdx));
2599 __ load_unsigned_byte(rbx, Address(rbcp, rdx, Address::times_1));
2600 __ addptr(rbcp, rdx);
2601 __ dispatch_only(vtos, true);
2602 // handle default
2603 __ bind(default_case);
2604 __ profile_switch_default(rax);
2605 __ movl(rdx, Address(rbx, 0));
2606 __ jmp(continue_execution);
2607 }
2608
2609 void TemplateTable::lookupswitch() {
2610 transition(itos, itos);
2611 __ stop("lookupswitch bytecode should have been rewritten");
2612 }
2613
2614 void TemplateTable::fast_linearswitch() {
2615 transition(itos, vtos);
2616 Label loop_entry, loop, found, continue_execution;
2617 // bswap rax so we can avoid bswapping the table entries
2618 __ bswapl(rax);
2619 // align r13
2620 __ lea(rbx, at_bcp(BytesPerInt)); // btw: should be able to get rid of
2621 // this instruction (change offsets
2622 // below)
2623 __ andptr(rbx, -BytesPerInt);
2624 // set counter
2625 __ movl(rcx, Address(rbx, BytesPerInt));
2626 __ bswapl(rcx);
2627 __ jmpb(loop_entry);
2628 // table search
2629 __ bind(loop);
2630 __ cmpl(rax, Address(rbx, rcx, Address::times_8, 2 * BytesPerInt));
2631 __ jcc(Assembler::equal, found);
2632 __ bind(loop_entry);
2633 __ decrementl(rcx);
2634 __ jcc(Assembler::greaterEqual, loop);
2635 // default case
2636 __ profile_switch_default(rax);
2637 __ movl(rdx, Address(rbx, 0));
2638 __ jmp(continue_execution);
2639 // entry found -> get offset
2640 __ bind(found);
2641 __ movl(rdx, Address(rbx, rcx, Address::times_8, 3 * BytesPerInt));
2642 __ profile_switch_case(rcx, rax, rbx);
2643 // continue execution
2644 __ bind(continue_execution);
2645 __ bswapl(rdx);
2646 __ movl2ptr(rdx, rdx);
2647 __ load_unsigned_byte(rbx, Address(rbcp, rdx, Address::times_1));
2648 __ addptr(rbcp, rdx);
2649 __ dispatch_only(vtos, true);
2650 }
2651
2652 void TemplateTable::fast_binaryswitch() {
2653 transition(itos, vtos);
2654 // Implementation using the following core algorithm:
2655 //
2656 // int binary_search(int key, LookupswitchPair* array, int n) {
2657 // // Binary search according to "Methodik des Programmierens" by
2658 // // Edsger W. Dijkstra and W.H.J. Feijen, Addison Wesley Germany 1985.
2659 // int i = 0;
2660 // int j = n;
2661 // while (i+1 < j) {
2662 // // invariant P: 0 <= i < j <= n and (a[i] <= key < a[j] or Q)
2663 // // with Q: for all i: 0 <= i < n: key < a[i]
2664 // // where a stands for the array and assuming that the (inexisting)
2665 // // element a[n] is infinitely big.
2666 // int h = (i + j) >> 1;
2667 // // i < h < j
2668 // if (key < array[h].fast_match()) {
2669 // j = h;
2670 // } else {
2671 // i = h;
2672 // }
2673 // }
2674 // // R: a[i] <= key < a[i+1] or Q
2675 // // (i.e., if key is within array, i is the correct index)
2676 // return i;
2677 // }
2678
2679 // Register allocation
2680 const Register key = rax; // already set (tosca)
2681 const Register array = rbx;
2682 const Register i = rcx;
2683 const Register j = rdx;
2684 const Register h = rdi;
2685 const Register temp = rsi;
2686
2687 // Find array start
2688 NOT_LP64(__ save_bcp());
2689
2690 __ lea(array, at_bcp(3 * BytesPerInt)); // btw: should be able to
2691 // get rid of this
2692 // instruction (change
2693 // offsets below)
2694 __ andptr(array, -BytesPerInt);
2695
2696 // Initialize i & j
2697 __ xorl(i, i); // i = 0;
2698 __ movl(j, Address(array, -BytesPerInt)); // j = length(array);
2699
2700 // Convert j into native byteordering
2701 __ bswapl(j);
2702
2703 // And start
2704 Label entry;
2705 __ jmp(entry);
2706
2707 // binary search loop
2708 {
2709 Label loop;
2710 __ bind(loop);
2711 // int h = (i + j) >> 1;
2712 __ leal(h, Address(i, j, Address::times_1)); // h = i + j;
2713 __ sarl(h, 1); // h = (i + j) >> 1;
2714 // if (key < array[h].fast_match()) {
2715 // j = h;
2716 // } else {
2717 // i = h;
2718 // }
2719 // Convert array[h].match to native byte-ordering before compare
2720 __ movl(temp, Address(array, h, Address::times_8));
2721 __ bswapl(temp);
2722 __ cmpl(key, temp);
2723 // j = h if (key < array[h].fast_match())
2724 __ cmov32(Assembler::less, j, h);
2725 // i = h if (key >= array[h].fast_match())
2726 __ cmov32(Assembler::greaterEqual, i, h);
2727 // while (i+1 < j)
2728 __ bind(entry);
2729 __ leal(h, Address(i, 1)); // i+1
2730 __ cmpl(h, j); // i+1 < j
2731 __ jcc(Assembler::less, loop);
2732 }
2733
2734 // end of binary search, result index is i (must check again!)
2735 Label default_case;
2736 // Convert array[i].match to native byte-ordering before compare
2737 __ movl(temp, Address(array, i, Address::times_8));
2738 __ bswapl(temp);
2739 __ cmpl(key, temp);
2740 __ jcc(Assembler::notEqual, default_case);
2741
2742 // entry found -> j = offset
2743 __ movl(j , Address(array, i, Address::times_8, BytesPerInt));
2744 __ profile_switch_case(i, key, array);
2745 __ bswapl(j);
2746 LP64_ONLY(__ movslq(j, j));
2747
2748 NOT_LP64(__ restore_bcp());
2749 NOT_LP64(__ restore_locals()); // restore rdi
2750
2751 __ load_unsigned_byte(rbx, Address(rbcp, j, Address::times_1));
2752 __ addptr(rbcp, j);
2753 __ dispatch_only(vtos, true);
2754
2755 // default case -> j = default offset
2756 __ bind(default_case);
2757 __ profile_switch_default(i);
2758 __ movl(j, Address(array, -2 * BytesPerInt));
2759 __ bswapl(j);
2760 LP64_ONLY(__ movslq(j, j));
2761
2762 NOT_LP64(__ restore_bcp());
2763 NOT_LP64(__ restore_locals());
2764
2765 __ load_unsigned_byte(rbx, Address(rbcp, j, Address::times_1));
2766 __ addptr(rbcp, j);
2767 __ dispatch_only(vtos, true);
2768 }
2769
2770 void TemplateTable::_return(TosState state) {
2771 transition(state, state);
2772
2773 assert(_desc->calls_vm(),
2774 "inconsistent calls_vm information"); // call in remove_activation
2775
2776 if (_desc->bytecode() == Bytecodes::_return_register_finalizer) {
2777 assert(state == vtos, "only valid state");
2778 Register robj = LP64_ONLY(c_rarg1) NOT_LP64(rax);
2779 __ movptr(robj, aaddress(0));
2780 __ load_klass(rdi, robj);
2781 __ movl(rdi, Address(rdi, Klass::access_flags_offset()));
2782 __ testl(rdi, JVM_ACC_HAS_FINALIZER);
2783 Label skip_register_finalizer;
2784 __ jcc(Assembler::zero, skip_register_finalizer);
2785
2786 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::register_finalizer), robj);
2787
2788 __ bind(skip_register_finalizer);
2789 }
2790
2791 if (SafepointMechanism::uses_thread_local_poll() && _desc->bytecode() != Bytecodes::_return_register_finalizer) {
2792 Label no_safepoint;
2793 NOT_PRODUCT(__ block_comment("Thread-local Safepoint poll"));
2794 #ifdef _LP64
2795 __ testb(Address(r15_thread, Thread::polling_page_offset()), SafepointMechanism::poll_bit());
2796 #else
2797 const Register thread = rdi;
2798 __ get_thread(thread);
2799 __ testb(Address(thread, Thread::polling_page_offset()), SafepointMechanism::poll_bit());
2800 #endif
2801 __ jcc(Assembler::zero, no_safepoint);
2802 __ push(state);
2803 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
2804 InterpreterRuntime::at_safepoint));
2805 __ pop(state);
2806 __ bind(no_safepoint);
2807 }
2808
2809 // Narrow result if state is itos but result type is smaller.
2810 // Need to narrow in the return bytecode rather than in generate_return_entry
2811 // since compiled code callers expect the result to already be narrowed.
2812 if (state == itos) {
2813 __ narrow(rax);
2814 }
2815
2816 __ remove_activation(state, rbcp, true, true, true);
2817
2818 __ jmp(rbcp);
2819 }
2820
2821 // ----------------------------------------------------------------------------
2822 // Volatile variables demand their effects be made known to all CPU's
2823 // in order. Store buffers on most chips allow reads & writes to
2824 // reorder; the JMM's ReadAfterWrite.java test fails in -Xint mode
2825 // without some kind of memory barrier (i.e., it's not sufficient that
2826 // the interpreter does not reorder volatile references, the hardware
2827 // also must not reorder them).
2828 //
2829 // According to the new Java Memory Model (JMM):
2830 // (1) All volatiles are serialized wrt to each other. ALSO reads &
2831 // writes act as aquire & release, so:
2832 // (2) A read cannot let unrelated NON-volatile memory refs that
2833 // happen after the read float up to before the read. It's OK for
2834 // non-volatile memory refs that happen before the volatile read to
2835 // float down below it.
2836 // (3) Similar a volatile write cannot let unrelated NON-volatile
2837 // memory refs that happen BEFORE the write float down to after the
2838 // write. It's OK for non-volatile memory refs that happen after the
2839 // volatile write to float up before it.
2840 //
2841 // We only put in barriers around volatile refs (they are expensive),
2842 // not _between_ memory refs (that would require us to track the
2843 // flavor of the previous memory refs). Requirements (2) and (3)
2844 // require some barriers before volatile stores and after volatile
2845 // loads. These nearly cover requirement (1) but miss the
2846 // volatile-store-volatile-load case. This final case is placed after
2847 // volatile-stores although it could just as well go before
2848 // volatile-loads.
2849
2850 void TemplateTable::volatile_barrier(Assembler::Membar_mask_bits order_constraint ) {
2851 // Helper function to insert a is-volatile test and memory barrier
2852 __ membar(order_constraint);
2853 }
2854
2855 void TemplateTable::resolve_cache_and_index(int byte_no,
2856 Register cache,
2857 Register index,
2858 size_t index_size) {
2859 const Register temp = rbx;
2860 assert_different_registers(cache, index, temp);
2861
2862 Label L_clinit_barrier_slow;
2863 Label resolved;
2864
2865 Bytecodes::Code code = bytecode();
2866 switch (code) {
2867 case Bytecodes::_nofast_getfield: code = Bytecodes::_getfield; break;
2868 case Bytecodes::_nofast_putfield: code = Bytecodes::_putfield; break;
2869 default: break;
2870 }
2871
2872 assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range");
2873 __ get_cache_and_index_and_bytecode_at_bcp(cache, index, temp, byte_no, 1, index_size);
2874 __ cmpl(temp, code); // have we resolved this bytecode?
2875 __ jcc(Assembler::equal, resolved);
2876
2877 // resolve first time through
2878 // Class initialization barrier slow path lands here as well.
2879 __ bind(L_clinit_barrier_slow);
2880 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_from_cache);
2881 __ movl(temp, code);
2882 __ call_VM(noreg, entry, temp);
2883 // Update registers with resolved info
2884 __ get_cache_and_index_at_bcp(cache, index, 1, index_size);
2885
2886 __ bind(resolved);
2887
2888 // Class initialization barrier for static methods
2889 if (VM_Version::supports_fast_class_init_checks() && bytecode() == Bytecodes::_invokestatic) {
2890 const Register method = temp;
2891 const Register klass = temp;
2892 const Register thread = LP64_ONLY(r15_thread) NOT_LP64(noreg);
2893 assert(thread != noreg, "x86_32 not supported");
2894
2895 __ load_resolved_method_at_index(byte_no, method, cache, index);
2896 __ load_method_holder(klass, method);
2897 __ clinit_barrier(klass, thread, NULL /*L_fast_path*/, &L_clinit_barrier_slow);
2898 }
2899 }
2900
2901 // The cache and index registers must be set before call
2902 void TemplateTable::load_field_cp_cache_entry(Register obj,
2903 Register cache,
2904 Register index,
2905 Register off,
2906 Register flags,
2907 bool is_static = false) {
2908 assert_different_registers(cache, index, flags, off);
2909
2910 ByteSize cp_base_offset = ConstantPoolCache::base_offset();
2911 // Field offset
2912 __ movptr(off, Address(cache, index, Address::times_ptr,
2913 in_bytes(cp_base_offset +
2914 ConstantPoolCacheEntry::f2_offset())));
2915 // Flags
2916 __ movl(flags, Address(cache, index, Address::times_ptr,
2917 in_bytes(cp_base_offset +
2918 ConstantPoolCacheEntry::flags_offset())));
2919
2920 // klass overwrite register
2921 if (is_static) {
2922 __ movptr(obj, Address(cache, index, Address::times_ptr,
2923 in_bytes(cp_base_offset +
2924 ConstantPoolCacheEntry::f1_offset())));
2925 const int mirror_offset = in_bytes(Klass::java_mirror_offset());
2926 __ movptr(obj, Address(obj, mirror_offset));
2927 __ resolve_oop_handle(obj);
2928 }
2929 }
2930
2931 void TemplateTable::load_invoke_cp_cache_entry(int byte_no,
2932 Register method,
2933 Register itable_index,
2934 Register flags,
2935 bool is_invokevirtual,
2936 bool is_invokevfinal, /*unused*/
2937 bool is_invokedynamic) {
2938 // setup registers
2939 const Register cache = rcx;
2940 const Register index = rdx;
2941 assert_different_registers(method, flags);
2942 assert_different_registers(method, cache, index);
2943 assert_different_registers(itable_index, flags);
2944 assert_different_registers(itable_index, cache, index);
2945 // determine constant pool cache field offsets
2946 assert(is_invokevirtual == (byte_no == f2_byte), "is_invokevirtual flag redundant");
2947 const int flags_offset = in_bytes(ConstantPoolCache::base_offset() +
2948 ConstantPoolCacheEntry::flags_offset());
2949 // access constant pool cache fields
2950 const int index_offset = in_bytes(ConstantPoolCache::base_offset() +
2951 ConstantPoolCacheEntry::f2_offset());
2952
2953 size_t index_size = (is_invokedynamic ? sizeof(u4) : sizeof(u2));
2954 resolve_cache_and_index(byte_no, cache, index, index_size);
2955 __ load_resolved_method_at_index(byte_no, method, cache, index);
2956
2957 if (itable_index != noreg) {
2958 // pick up itable or appendix index from f2 also:
2959 __ movptr(itable_index, Address(cache, index, Address::times_ptr, index_offset));
2960 }
2961 __ movl(flags, Address(cache, index, Address::times_ptr, flags_offset));
2962 }
2963
2964 // The registers cache and index expected to be set before call.
2965 // Correct values of the cache and index registers are preserved.
2966 void TemplateTable::jvmti_post_field_access(Register cache,
2967 Register index,
2968 bool is_static,
2969 bool has_tos) {
2970 if (JvmtiExport::can_post_field_access()) {
2971 // Check to see if a field access watch has been set before we take
2972 // the time to call into the VM.
2973 Label L1;
2974 assert_different_registers(cache, index, rax);
2975 __ mov32(rax, ExternalAddress((address) JvmtiExport::get_field_access_count_addr()));
2976 __ testl(rax,rax);
2977 __ jcc(Assembler::zero, L1);
2978
2979 // cache entry pointer
2980 __ addptr(cache, in_bytes(ConstantPoolCache::base_offset()));
2981 __ shll(index, LogBytesPerWord);
2982 __ addptr(cache, index);
2983 if (is_static) {
2984 __ xorptr(rax, rax); // NULL object reference
2985 } else {
2986 __ pop(atos); // Get the object
2987 __ verify_oop(rax);
2988 __ push(atos); // Restore stack state
2989 }
2990 // rax,: object pointer or NULL
2991 // cache: cache entry pointer
2992 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access),
2993 rax, cache);
2994 __ get_cache_and_index_at_bcp(cache, index, 1);
2995 __ bind(L1);
2996 }
2997 }
2998
2999 void TemplateTable::pop_and_check_object(Register r) {
3000 __ pop_ptr(r);
3001 __ null_check(r); // for field access must check obj.
3002 __ verify_oop(r);
3003 }
3004
3005 void TemplateTable::getfield_or_static(int byte_no, bool is_static, RewriteControl rc) {
3006 transition(vtos, vtos);
3007
3008 const Register cache = rcx;
3009 const Register index = rdx;
3010 const Register obj = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
3011 const Register off = rbx;
3012 const Register flags = rax;
3013 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // uses same reg as obj, so don't mix them
3014 const Register flags2 = rdx;
3015
3016 resolve_cache_and_index(byte_no, cache, index, sizeof(u2));
3017 jvmti_post_field_access(cache, index, is_static, false);
3018 load_field_cp_cache_entry(obj, cache, index, off, flags, is_static);
3019
3020 const Address field(obj, off, Address::times_1, 0*wordSize);
3021
3022 Label Done, notByte, notBool, notInt, notShort, notChar, notLong, notFloat, notObj, notValueType;
3023
3024 if (!is_static) {
3025 __ movptr(rcx, Address(cache, index, Address::times_ptr,
3026 in_bytes(ConstantPoolCache::base_offset() +
3027 ConstantPoolCacheEntry::f1_offset())));
3028 }
3029
3030 __ movl(flags2, flags);
3031
3032 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift);
3033 // Make sure we don't need to mask edx after the above shift
3034 assert(btos == 0, "change code, btos != 0");
3035
3036 __ andl(flags, ConstantPoolCacheEntry::tos_state_mask);
3037
3038 __ jcc(Assembler::notZero, notByte);
3039 // btos
3040 if (!is_static) pop_and_check_object(obj);
3041 __ access_load_at(T_BYTE, IN_HEAP, rax, field, noreg, noreg);
3042 __ push(btos);
3043 // Rewrite bytecode to be faster
3044 if (!is_static && rc == may_rewrite) {
3045 patch_bytecode(Bytecodes::_fast_bgetfield, bc, rbx);
3046 }
3047 __ jmp(Done);
3048
3049 __ bind(notByte);
3050
3051 __ cmpl(flags, ztos);
3052 __ jcc(Assembler::notEqual, notBool);
3053 if (!is_static) pop_and_check_object(obj);
3054 // ztos (same code as btos)
3055 __ access_load_at(T_BOOLEAN, IN_HEAP, rax, field, noreg, noreg);
3056 __ push(ztos);
3057 // Rewrite bytecode to be faster
3058 if (!is_static && rc == may_rewrite) {
3059 // use btos rewriting, no truncating to t/f bit is needed for getfield.
3060 patch_bytecode(Bytecodes::_fast_bgetfield, bc, rbx);
3061 }
3062 __ jmp(Done);
3063
3064 __ bind(notBool);
3065 __ cmpl(flags, atos);
3066 __ jcc(Assembler::notEqual, notObj);
3067 // atos
3068 if (!EnableValhalla) {
3069 if (!is_static) pop_and_check_object(obj);
3070 do_oop_load(_masm, field, rax);
3071 __ push(atos);
3072 if (!is_static && rc == may_rewrite) {
3073 patch_bytecode(Bytecodes::_fast_agetfield, bc, rbx);
3074 }
3075 __ jmp(Done);
3076 } else {
3077 if (is_static) {
3078 __ load_heap_oop(rax, field);
3079 Label isFlattenable, uninitialized;
3080 // Issue below if the static field has not been initialized yet
3081 __ test_field_is_flattenable(flags2, rscratch1, isFlattenable);
3082 // Not flattenable case
3083 __ push(atos);
3084 __ jmp(Done);
3085 // Flattenable case, must not return null even if uninitialized
3086 __ bind(isFlattenable);
3087 __ testptr(rax, rax);
3088 __ jcc(Assembler::zero, uninitialized);
3089 __ push(atos);
3090 __ jmp(Done);
3091 __ bind(uninitialized);
3092 __ andl(flags2, ConstantPoolCacheEntry::field_index_mask);
3093 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::uninitialized_static_value_field),
3094 obj, flags2);
3095 __ verify_oop(rax);
3096 __ push(atos);
3097 __ jmp(Done);
3098 } else {
3099 Label isFlattened, nonnull, isFlattenable, rewriteFlattenable;
3100 __ test_field_is_flattenable(flags2, rscratch1, isFlattenable);
3101 // Non-flattenable field case, also covers the object case
3102 pop_and_check_object(obj);
3103 __ load_heap_oop(rax, field);
3104 __ push(atos);
3105 if (rc == may_rewrite) {
3106 patch_bytecode(Bytecodes::_fast_agetfield, bc, rbx);
3107 }
3108 __ jmp(Done);
3109 __ bind(isFlattenable);
3110 __ test_field_is_flattened(flags2, rscratch1, isFlattened);
3111 // Non-flattened field case
3112 pop_and_check_object(obj);
3113 __ load_heap_oop(rax, field);
3114 __ testptr(rax, rax);
3115 __ jcc(Assembler::notZero, nonnull);
3116 __ andl(flags2, ConstantPoolCacheEntry::field_index_mask);
3117 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::uninitialized_instance_value_field),
3118 obj, flags2);
3119 __ bind(nonnull);
3120 __ verify_oop(rax);
3121 __ push(atos);
3122 __ jmp(rewriteFlattenable);
3123 __ bind(isFlattened);
3124 __ andl(flags2, ConstantPoolCacheEntry::field_index_mask);
3125 pop_and_check_object(rbx);
3126 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::read_flattened_field),
3127 rbx, flags2, rcx);
3128 __ verify_oop(rax);
3129 __ push(atos);
3130 __ bind(rewriteFlattenable);
3131 if (rc == may_rewrite) {
3132 patch_bytecode(Bytecodes::_fast_qgetfield, bc, rbx);
3133 }
3134 __ jmp(Done);
3135 }
3136 }
3137
3138 __ bind(notObj);
3139
3140 if (!is_static) pop_and_check_object(obj);
3141
3142 __ cmpl(flags, itos);
3143 __ jcc(Assembler::notEqual, notInt);
3144 // itos
3145 __ access_load_at(T_INT, IN_HEAP, rax, field, noreg, noreg);
3146 __ push(itos);
3147 // Rewrite bytecode to be faster
3148 if (!is_static && rc == may_rewrite) {
3149 patch_bytecode(Bytecodes::_fast_igetfield, bc, rbx);
3150 }
3151 __ jmp(Done);
3152
3153 __ bind(notInt);
3154 __ cmpl(flags, ctos);
3155 __ jcc(Assembler::notEqual, notChar);
3156 // ctos
3157 __ access_load_at(T_CHAR, IN_HEAP, rax, field, noreg, noreg);
3158 __ push(ctos);
3159 // Rewrite bytecode to be faster
3160 if (!is_static && rc == may_rewrite) {
3161 patch_bytecode(Bytecodes::_fast_cgetfield, bc, rbx);
3162 }
3163 __ jmp(Done);
3164
3165 __ bind(notChar);
3166 __ cmpl(flags, stos);
3167 __ jcc(Assembler::notEqual, notShort);
3168 // stos
3169 __ access_load_at(T_SHORT, IN_HEAP, rax, field, noreg, noreg);
3170 __ push(stos);
3171 // Rewrite bytecode to be faster
3172 if (!is_static && rc == may_rewrite) {
3173 patch_bytecode(Bytecodes::_fast_sgetfield, bc, rbx);
3174 }
3175 __ jmp(Done);
3176
3177 __ bind(notShort);
3178 __ cmpl(flags, ltos);
3179 __ jcc(Assembler::notEqual, notLong);
3180 // ltos
3181 // Generate code as if volatile (x86_32). There just aren't enough registers to
3182 // save that information and this code is faster than the test.
3183 __ access_load_at(T_LONG, IN_HEAP | MO_RELAXED, noreg /* ltos */, field, noreg, noreg);
3184 __ push(ltos);
3185 // Rewrite bytecode to be faster
3186 LP64_ONLY(if (!is_static && rc == may_rewrite) patch_bytecode(Bytecodes::_fast_lgetfield, bc, rbx));
3187 __ jmp(Done);
3188
3189 __ bind(notLong);
3190 __ cmpl(flags, ftos);
3191 __ jcc(Assembler::notEqual, notFloat);
3192 // ftos
3193
3194 __ access_load_at(T_FLOAT, IN_HEAP, noreg /* ftos */, field, noreg, noreg);
3195 __ push(ftos);
3196 // Rewrite bytecode to be faster
3197 if (!is_static && rc == may_rewrite) {
3198 patch_bytecode(Bytecodes::_fast_fgetfield, bc, rbx);
3199 }
3200 __ jmp(Done);
3201
3202 __ bind(notFloat);
3203 #ifdef ASSERT
3204 Label notDouble;
3205 __ cmpl(flags, dtos);
3206 __ jcc(Assembler::notEqual, notDouble);
3207 #endif
3208 // dtos
3209 // MO_RELAXED: for the case of volatile field, in fact it adds no extra work for the underlying implementation
3210 __ access_load_at(T_DOUBLE, IN_HEAP | MO_RELAXED, noreg /* dtos */, field, noreg, noreg);
3211 __ push(dtos);
3212 // Rewrite bytecode to be faster
3213 if (!is_static && rc == may_rewrite) {
3214 patch_bytecode(Bytecodes::_fast_dgetfield, bc, rbx);
3215 }
3216 #ifdef ASSERT
3217 __ jmp(Done);
3218
3219 __ bind(notDouble);
3220 __ stop("Bad state");
3221 #endif
3222
3223 __ bind(Done);
3224 // [jk] not needed currently
3225 // volatile_barrier(Assembler::Membar_mask_bits(Assembler::LoadLoad |
3226 // Assembler::LoadStore));
3227 }
3228
3229 void TemplateTable::getfield(int byte_no) {
3230 getfield_or_static(byte_no, false);
3231 }
3232
3233 void TemplateTable::nofast_getfield(int byte_no) {
3234 getfield_or_static(byte_no, false, may_not_rewrite);
3235 }
3236
3237 void TemplateTable::getstatic(int byte_no) {
3238 getfield_or_static(byte_no, true);
3239 }
3240
3241 void TemplateTable::withfield() {
3242 transition(vtos, atos);
3243
3244 Register cache = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
3245 Register index = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
3246
3247 resolve_cache_and_index(f2_byte, cache, index, sizeof(u2));
3248
3249 call_VM(rbx, CAST_FROM_FN_PTR(address, InterpreterRuntime::withfield), cache);
3250 // new value type is returned in rbx
3251 // stack adjustement is returned in rax
3252 __ verify_oop(rbx);
3253 __ addptr(rsp, rax);
3254 __ movptr(rax, rbx);
3255 }
3256
3257 // The registers cache and index expected to be set before call.
3258 // The function may destroy various registers, just not the cache and index registers.
3259 void TemplateTable::jvmti_post_field_mod(Register cache, Register index, bool is_static) {
3260
3261 const Register robj = LP64_ONLY(c_rarg2) NOT_LP64(rax);
3262 const Register RBX = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
3263 const Register RCX = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
3264 const Register RDX = LP64_ONLY(rscratch1) NOT_LP64(rdx);
3265
3266 ByteSize cp_base_offset = ConstantPoolCache::base_offset();
3267
3268 if (JvmtiExport::can_post_field_modification()) {
3269 // Check to see if a field modification watch has been set before
3270 // we take the time to call into the VM.
3271 Label L1;
3272 assert_different_registers(cache, index, rax);
3273 __ mov32(rax, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr()));
3274 __ testl(rax, rax);
3275 __ jcc(Assembler::zero, L1);
3276
3277 __ get_cache_and_index_at_bcp(robj, RDX, 1);
3278
3279
3280 if (is_static) {
3281 // Life is simple. Null out the object pointer.
3282 __ xorl(RBX, RBX);
3283
3284 } else {
3285 // Life is harder. The stack holds the value on top, followed by
3286 // the object. We don't know the size of the value, though; it
3287 // could be one or two words depending on its type. As a result,
3288 // we must find the type to determine where the object is.
3289 #ifndef _LP64
3290 Label two_word, valsize_known;
3291 #endif
3292 __ movl(RCX, Address(robj, RDX,
3293 Address::times_ptr,
3294 in_bytes(cp_base_offset +
3295 ConstantPoolCacheEntry::flags_offset())));
3296 NOT_LP64(__ mov(rbx, rsp));
3297 __ shrl(RCX, ConstantPoolCacheEntry::tos_state_shift);
3298
3299 // Make sure we don't need to mask rcx after the above shift
3300 ConstantPoolCacheEntry::verify_tos_state_shift();
3301 #ifdef _LP64
3302 __ movptr(c_rarg1, at_tos_p1()); // initially assume a one word jvalue
3303 __ cmpl(c_rarg3, ltos);
3304 __ cmovptr(Assembler::equal,
3305 c_rarg1, at_tos_p2()); // ltos (two word jvalue)
3306 __ cmpl(c_rarg3, dtos);
3307 __ cmovptr(Assembler::equal,
3308 c_rarg1, at_tos_p2()); // dtos (two word jvalue)
3309 #else
3310 __ cmpl(rcx, ltos);
3311 __ jccb(Assembler::equal, two_word);
3312 __ cmpl(rcx, dtos);
3313 __ jccb(Assembler::equal, two_word);
3314 __ addptr(rbx, Interpreter::expr_offset_in_bytes(1)); // one word jvalue (not ltos, dtos)
3315 __ jmpb(valsize_known);
3316
3317 __ bind(two_word);
3318 __ addptr(rbx, Interpreter::expr_offset_in_bytes(2)); // two words jvalue
3319
3320 __ bind(valsize_known);
3321 // setup object pointer
3322 __ movptr(rbx, Address(rbx, 0));
3323 #endif
3324 }
3325 // cache entry pointer
3326 __ addptr(robj, in_bytes(cp_base_offset));
3327 __ shll(RDX, LogBytesPerWord);
3328 __ addptr(robj, RDX);
3329 // object (tos)
3330 __ mov(RCX, rsp);
3331 // c_rarg1: object pointer set up above (NULL if static)
3332 // c_rarg2: cache entry pointer
3333 // c_rarg3: jvalue object on the stack
3334 __ call_VM(noreg,
3335 CAST_FROM_FN_PTR(address,
3336 InterpreterRuntime::post_field_modification),
3337 RBX, robj, RCX);
3338 __ get_cache_and_index_at_bcp(cache, index, 1);
3339 __ bind(L1);
3340 }
3341 }
3342
3343 void TemplateTable::putfield_or_static(int byte_no, bool is_static, RewriteControl rc) {
3344 transition(vtos, vtos);
3345
3346 const Register cache = rcx;
3347 const Register index = rdx;
3348 const Register obj = rcx;
3349 const Register off = rbx;
3350 const Register flags = rax;
3351 const Register flags2 = rdx;
3352
3353 resolve_cache_and_index(byte_no, cache, index, sizeof(u2));
3354 jvmti_post_field_mod(cache, index, is_static);
3355 load_field_cp_cache_entry(obj, cache, index, off, flags, is_static);
3356
3357 // [jk] not needed currently
3358 // volatile_barrier(Assembler::Membar_mask_bits(Assembler::LoadStore |
3359 // Assembler::StoreStore));
3360
3361 Label notVolatile, Done;
3362 __ movl(rdx, flags);
3363 __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift);
3364 __ andl(rdx, 0x1);
3365
3366 // Check for volatile store
3367 __ testl(rdx, rdx);
3368 __ movl(flags2, flags);
3369 __ jcc(Assembler::zero, notVolatile);
3370
3371 putfield_or_static_helper(byte_no, is_static, rc, obj, off, flags, flags2);
3372 volatile_barrier(Assembler::Membar_mask_bits(Assembler::StoreLoad |
3373 Assembler::StoreStore));
3374 __ jmp(Done);
3375 __ bind(notVolatile);
3376
3377 putfield_or_static_helper(byte_no, is_static, rc, obj, off, flags, flags2);
3378
3379 __ bind(Done);
3380 }
3381
3382 void TemplateTable::putfield_or_static_helper(int byte_no, bool is_static, RewriteControl rc,
3383 Register obj, Register off, Register flags, Register flags2) {
3384
3385 // field addresses
3386 const Address field(obj, off, Address::times_1, 0*wordSize);
3387 NOT_LP64( const Address hi(obj, off, Address::times_1, 1*wordSize);)
3388
3389 Label notByte, notBool, notInt, notShort, notChar,
3390 notLong, notFloat, notObj, notValueType;
3391 Label Done;
3392
3393 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
3394
3395 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift);
3396
3397 assert(btos == 0, "change code, btos != 0");
3398 __ andl(flags, ConstantPoolCacheEntry::tos_state_mask);
3399 __ jcc(Assembler::notZero, notByte);
3400
3401 // btos
3402 {
3403 __ pop(btos);
3404 if (!is_static) pop_and_check_object(obj);
3405 __ access_store_at(T_BYTE, IN_HEAP, field, rax, noreg, noreg);
3406 if (!is_static && rc == may_rewrite) {
3407 patch_bytecode(Bytecodes::_fast_bputfield, bc, rbx, true, byte_no);
3408 }
3409 __ jmp(Done);
3410 }
3411
3412 __ bind(notByte);
3413 __ cmpl(flags, ztos);
3414 __ jcc(Assembler::notEqual, notBool);
3415
3416 // ztos
3417 {
3418 __ pop(ztos);
3419 if (!is_static) pop_and_check_object(obj);
3420 __ access_store_at(T_BOOLEAN, IN_HEAP, field, rax, noreg, noreg);
3421 if (!is_static && rc == may_rewrite) {
3422 patch_bytecode(Bytecodes::_fast_zputfield, bc, rbx, true, byte_no);
3423 }
3424 __ jmp(Done);
3425 }
3426
3427 __ bind(notBool);
3428 __ cmpl(flags, atos);
3429 __ jcc(Assembler::notEqual, notObj);
3430
3431 // atos
3432 {
3433 if (!EnableValhalla) {
3434 __ pop(atos);
3435 if (!is_static) pop_and_check_object(obj);
3436 // Store into the field
3437 do_oop_store(_masm, field, rax);
3438 if (!is_static && rc == may_rewrite) {
3439 patch_bytecode(Bytecodes::_fast_aputfield, bc, rbx, true, byte_no);
3440 }
3441 __ jmp(Done);
3442 } else {
3443 __ pop(atos);
3444 if (is_static) {
3445 Label notFlattenable, notBuffered;
3446 __ test_field_is_not_flattenable(flags2, rscratch1, notFlattenable);
3447 __ null_check(rax);
3448 __ bind(notFlattenable);
3449 do_oop_store(_masm, field, rax);
3450 __ jmp(Done);
3451 } else {
3452 Label isFlattenable, isFlattened, notBuffered, notBuffered2, rewriteNotFlattenable, rewriteFlattenable;
3453 __ test_field_is_flattenable(flags2, rscratch1, isFlattenable);
3454 // Not flattenable case, covers not flattenable values and objects
3455 pop_and_check_object(obj);
3456 // Store into the field
3457 do_oop_store(_masm, field, rax);
3458 __ bind(rewriteNotFlattenable);
3459 if (rc == may_rewrite) {
3460 patch_bytecode(Bytecodes::_fast_aputfield, bc, rbx, true, byte_no);
3461 }
3462 __ jmp(Done);
3463 // Implementation of the flattenable semantic
3464 __ bind(isFlattenable);
3465 __ null_check(rax);
3466 __ test_field_is_flattened(flags2, rscratch1, isFlattened);
3467 // Not flattened case
3468 pop_and_check_object(obj);
3469 // Store into the field
3470 do_oop_store(_masm, field, rax);
3471 __ jmp(rewriteFlattenable);
3472 __ bind(isFlattened);
3473 pop_and_check_object(obj);
3474 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::write_flattened_value),
3475 rax, off, obj);
3476 __ bind(rewriteFlattenable);
3477 if (rc == may_rewrite) {
3478 patch_bytecode(Bytecodes::_fast_qputfield, bc, rbx, true, byte_no);
3479 }
3480 __ jmp(Done);
3481 }
3482 }
3483 }
3484
3485 __ bind(notObj);
3486 __ cmpl(flags, itos);
3487 __ jcc(Assembler::notEqual, notInt);
3488
3489 // itos
3490 {
3491 __ pop(itos);
3492 if (!is_static) pop_and_check_object(obj);
3493 __ access_store_at(T_INT, IN_HEAP, field, rax, noreg, noreg);
3494 if (!is_static && rc == may_rewrite) {
3495 patch_bytecode(Bytecodes::_fast_iputfield, bc, rbx, true, byte_no);
3496 }
3497 __ jmp(Done);
3498 }
3499
3500 __ bind(notInt);
3501 __ cmpl(flags, ctos);
3502 __ jcc(Assembler::notEqual, notChar);
3503
3504 // ctos
3505 {
3506 __ pop(ctos);
3507 if (!is_static) pop_and_check_object(obj);
3508 __ access_store_at(T_CHAR, IN_HEAP, field, rax, noreg, noreg);
3509 if (!is_static && rc == may_rewrite) {
3510 patch_bytecode(Bytecodes::_fast_cputfield, bc, rbx, true, byte_no);
3511 }
3512 __ jmp(Done);
3513 }
3514
3515 __ bind(notChar);
3516 __ cmpl(flags, stos);
3517 __ jcc(Assembler::notEqual, notShort);
3518
3519 // stos
3520 {
3521 __ pop(stos);
3522 if (!is_static) pop_and_check_object(obj);
3523 __ access_store_at(T_SHORT, IN_HEAP, field, rax, noreg, noreg);
3524 if (!is_static && rc == may_rewrite) {
3525 patch_bytecode(Bytecodes::_fast_sputfield, bc, rbx, true, byte_no);
3526 }
3527 __ jmp(Done);
3528 }
3529
3530 __ bind(notShort);
3531 __ cmpl(flags, ltos);
3532 __ jcc(Assembler::notEqual, notLong);
3533
3534 // ltos
3535 {
3536 __ pop(ltos);
3537 if (!is_static) pop_and_check_object(obj);
3538 // MO_RELAXED: generate atomic store for the case of volatile field (important for x86_32)
3539 __ access_store_at(T_LONG, IN_HEAP | MO_RELAXED, field, noreg /* ltos*/, noreg, noreg);
3540 #ifdef _LP64
3541 if (!is_static && rc == may_rewrite) {
3542 patch_bytecode(Bytecodes::_fast_lputfield, bc, rbx, true, byte_no);
3543 }
3544 #endif // _LP64
3545 __ jmp(Done);
3546 }
3547
3548 __ bind(notLong);
3549 __ cmpl(flags, ftos);
3550 __ jcc(Assembler::notEqual, notFloat);
3551
3552 // ftos
3553 {
3554 __ pop(ftos);
3555 if (!is_static) pop_and_check_object(obj);
3556 __ access_store_at(T_FLOAT, IN_HEAP, field, noreg /* ftos */, noreg, noreg);
3557 if (!is_static && rc == may_rewrite) {
3558 patch_bytecode(Bytecodes::_fast_fputfield, bc, rbx, true, byte_no);
3559 }
3560 __ jmp(Done);
3561 }
3562
3563 __ bind(notFloat);
3564 #ifdef ASSERT
3565 Label notDouble;
3566 __ cmpl(flags, dtos);
3567 __ jcc(Assembler::notEqual, notDouble);
3568 #endif
3569
3570 // dtos
3571 {
3572 __ pop(dtos);
3573 if (!is_static) pop_and_check_object(obj);
3574 // MO_RELAXED: for the case of volatile field, in fact it adds no extra work for the underlying implementation
3575 __ access_store_at(T_DOUBLE, IN_HEAP | MO_RELAXED, field, noreg /* dtos */, noreg, noreg);
3576 if (!is_static && rc == may_rewrite) {
3577 patch_bytecode(Bytecodes::_fast_dputfield, bc, rbx, true, byte_no);
3578 }
3579 }
3580
3581 #ifdef ASSERT
3582 __ jmp(Done);
3583
3584 __ bind(notDouble);
3585 __ stop("Bad state");
3586 #endif
3587
3588 __ bind(Done);
3589 }
3590
3591 void TemplateTable::putfield(int byte_no) {
3592 putfield_or_static(byte_no, false);
3593 }
3594
3595 void TemplateTable::nofast_putfield(int byte_no) {
3596 putfield_or_static(byte_no, false, may_not_rewrite);
3597 }
3598
3599 void TemplateTable::putstatic(int byte_no) {
3600 putfield_or_static(byte_no, true);
3601 }
3602
3603 void TemplateTable::jvmti_post_fast_field_mod() {
3604
3605 const Register scratch = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
3606
3607 if (JvmtiExport::can_post_field_modification()) {
3608 // Check to see if a field modification watch has been set before
3609 // we take the time to call into the VM.
3610 Label L2;
3611 __ mov32(scratch, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr()));
3612 __ testl(scratch, scratch);
3613 __ jcc(Assembler::zero, L2);
3614 __ pop_ptr(rbx); // copy the object pointer from tos
3615 __ verify_oop(rbx);
3616 __ push_ptr(rbx); // put the object pointer back on tos
3617 // Save tos values before call_VM() clobbers them. Since we have
3618 // to do it for every data type, we use the saved values as the
3619 // jvalue object.
3620 switch (bytecode()) { // load values into the jvalue object
3621 case Bytecodes::_fast_qputfield: //fall through
3622 case Bytecodes::_fast_aputfield: __ push_ptr(rax); break;
3623 case Bytecodes::_fast_bputfield: // fall through
3624 case Bytecodes::_fast_zputfield: // fall through
3625 case Bytecodes::_fast_sputfield: // fall through
3626 case Bytecodes::_fast_cputfield: // fall through
3627 case Bytecodes::_fast_iputfield: __ push_i(rax); break;
3628 case Bytecodes::_fast_dputfield: __ push(dtos); break;
3629 case Bytecodes::_fast_fputfield: __ push(ftos); break;
3630 case Bytecodes::_fast_lputfield: __ push_l(rax); break;
3631
3632 default:
3633 ShouldNotReachHere();
3634 }
3635 __ mov(scratch, rsp); // points to jvalue on the stack
3636 // access constant pool cache entry
3637 LP64_ONLY(__ get_cache_entry_pointer_at_bcp(c_rarg2, rax, 1));
3638 NOT_LP64(__ get_cache_entry_pointer_at_bcp(rax, rdx, 1));
3639 __ verify_oop(rbx);
3640 // rbx: object pointer copied above
3641 // c_rarg2: cache entry pointer
3642 // c_rarg3: jvalue object on the stack
3643 LP64_ONLY(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_modification), rbx, c_rarg2, c_rarg3));
3644 NOT_LP64(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_modification), rbx, rax, rcx));
3645
3646 switch (bytecode()) { // restore tos values
3647 case Bytecodes::_fast_qputfield: // fall through
3648 case Bytecodes::_fast_aputfield: __ pop_ptr(rax); break;
3649 case Bytecodes::_fast_bputfield: // fall through
3650 case Bytecodes::_fast_zputfield: // fall through
3651 case Bytecodes::_fast_sputfield: // fall through
3652 case Bytecodes::_fast_cputfield: // fall through
3653 case Bytecodes::_fast_iputfield: __ pop_i(rax); break;
3654 case Bytecodes::_fast_dputfield: __ pop(dtos); break;
3655 case Bytecodes::_fast_fputfield: __ pop(ftos); break;
3656 case Bytecodes::_fast_lputfield: __ pop_l(rax); break;
3657 default: break;
3658 }
3659 __ bind(L2);
3660 }
3661 }
3662
3663 void TemplateTable::fast_storefield(TosState state) {
3664 transition(state, vtos);
3665
3666 ByteSize base = ConstantPoolCache::base_offset();
3667
3668 jvmti_post_fast_field_mod();
3669
3670 // access constant pool cache
3671 __ get_cache_and_index_at_bcp(rcx, rbx, 1);
3672
3673 // test for volatile with rdx but rdx is tos register for lputfield.
3674 __ movl(rdx, Address(rcx, rbx, Address::times_ptr,
3675 in_bytes(base +
3676 ConstantPoolCacheEntry::flags_offset())));
3677
3678 // replace index with field offset from cache entry
3679 __ movptr(rbx, Address(rcx, rbx, Address::times_ptr,
3680 in_bytes(base + ConstantPoolCacheEntry::f2_offset())));
3681
3682 // [jk] not needed currently
3683 // volatile_barrier(Assembler::Membar_mask_bits(Assembler::LoadStore |
3684 // Assembler::StoreStore));
3685
3686 Label notVolatile, Done;
3687 if (bytecode() == Bytecodes::_fast_qputfield) {
3688 __ movl(rscratch2, rdx);
3689 }
3690
3691 __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift);
3692 __ andl(rdx, 0x1);
3693
3694 // Get object from stack
3695 pop_and_check_object(rcx);
3696
3697 // field address
3698 const Address field(rcx, rbx, Address::times_1);
3699
3700 // Check for volatile store
3701 __ testl(rdx, rdx);
3702 __ jcc(Assembler::zero, notVolatile);
3703
3704 fast_storefield_helper(field, rax);
3705 volatile_barrier(Assembler::Membar_mask_bits(Assembler::StoreLoad |
3706 Assembler::StoreStore));
3707 __ jmp(Done);
3708 __ bind(notVolatile);
3709
3710 fast_storefield_helper(field, rax);
3711
3712 __ bind(Done);
3713 }
3714
3715 void TemplateTable::fast_storefield_helper(Address field, Register rax) {
3716
3717 // access field
3718 switch (bytecode()) {
3719 case Bytecodes::_fast_qputfield:
3720 {
3721 Label isFlattened, done;
3722 __ null_check(rax);
3723 __ test_field_is_flattened(rscratch2, rscratch1, isFlattened);
3724 // No Flattened case
3725 do_oop_store(_masm, field, rax);
3726 __ jmp(done);
3727 __ bind(isFlattened);
3728 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::write_flattened_value),
3729 rax, rbx, rcx);
3730 __ bind(done);
3731 }
3732 break;
3733 case Bytecodes::_fast_aputfield:
3734 {
3735 do_oop_store(_masm, field, rax);
3736 }
3737 break;
3738 case Bytecodes::_fast_lputfield:
3739 #ifdef _LP64
3740 __ access_store_at(T_LONG, IN_HEAP, field, noreg /* ltos */, noreg, noreg);
3741 #else
3742 __ stop("should not be rewritten");
3743 #endif
3744 break;
3745 case Bytecodes::_fast_iputfield:
3746 __ access_store_at(T_INT, IN_HEAP, field, rax, noreg, noreg);
3747 break;
3748 case Bytecodes::_fast_zputfield:
3749 __ access_store_at(T_BOOLEAN, IN_HEAP, field, rax, noreg, noreg);
3750 break;
3751 case Bytecodes::_fast_bputfield:
3752 __ access_store_at(T_BYTE, IN_HEAP, field, rax, noreg, noreg);
3753 break;
3754 case Bytecodes::_fast_sputfield:
3755 __ access_store_at(T_SHORT, IN_HEAP, field, rax, noreg, noreg);
3756 break;
3757 case Bytecodes::_fast_cputfield:
3758 __ access_store_at(T_CHAR, IN_HEAP, field, rax, noreg, noreg);
3759 break;
3760 case Bytecodes::_fast_fputfield:
3761 __ access_store_at(T_FLOAT, IN_HEAP, field, noreg /* ftos*/, noreg, noreg);
3762 break;
3763 case Bytecodes::_fast_dputfield:
3764 __ access_store_at(T_DOUBLE, IN_HEAP, field, noreg /* dtos*/, noreg, noreg);
3765 break;
3766 default:
3767 ShouldNotReachHere();
3768 }
3769 }
3770
3771 void TemplateTable::fast_accessfield(TosState state) {
3772 transition(atos, state);
3773
3774 // Do the JVMTI work here to avoid disturbing the register state below
3775 if (JvmtiExport::can_post_field_access()) {
3776 // Check to see if a field access watch has been set before we
3777 // take the time to call into the VM.
3778 Label L1;
3779 __ mov32(rcx, ExternalAddress((address) JvmtiExport::get_field_access_count_addr()));
3780 __ testl(rcx, rcx);
3781 __ jcc(Assembler::zero, L1);
3782 // access constant pool cache entry
3783 LP64_ONLY(__ get_cache_entry_pointer_at_bcp(c_rarg2, rcx, 1));
3784 NOT_LP64(__ get_cache_entry_pointer_at_bcp(rcx, rdx, 1));
3785 __ verify_oop(rax);
3786 __ push_ptr(rax); // save object pointer before call_VM() clobbers it
3787 LP64_ONLY(__ mov(c_rarg1, rax));
3788 // c_rarg1: object pointer copied above
3789 // c_rarg2: cache entry pointer
3790 LP64_ONLY(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access), c_rarg1, c_rarg2));
3791 NOT_LP64(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access), rax, rcx));
3792 __ pop_ptr(rax); // restore object pointer
3793 __ bind(L1);
3794 }
3795
3796 // access constant pool cache
3797 __ get_cache_and_index_at_bcp(rcx, rbx, 1);
3798 // replace index with field offset from cache entry
3799 // [jk] not needed currently
3800 // __ movl(rdx, Address(rcx, rbx, Address::times_8,
3801 // in_bytes(ConstantPoolCache::base_offset() +
3802 // ConstantPoolCacheEntry::flags_offset())));
3803 // __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift);
3804 // __ andl(rdx, 0x1);
3805 //
3806 __ movptr(rdx, Address(rcx, rbx, Address::times_ptr,
3807 in_bytes(ConstantPoolCache::base_offset() +
3808 ConstantPoolCacheEntry::f2_offset())));
3809
3810 // rax: object
3811 __ verify_oop(rax);
3812 __ null_check(rax);
3813 Address field(rax, rdx, Address::times_1);
3814
3815 // access field
3816 switch (bytecode()) {
3817 case Bytecodes::_fast_qgetfield:
3818 {
3819 Label isFlattened, nonnull, Done;
3820 __ movptr(rscratch1, Address(rcx, rbx, Address::times_ptr,
3821 in_bytes(ConstantPoolCache::base_offset() +
3822 ConstantPoolCacheEntry::flags_offset())));
3823 __ test_field_is_flattened(rscratch1, rscratch2, isFlattened);
3824 // Non-flattened field case
3825 __ movptr(rscratch1, rax);
3826 __ load_heap_oop(rax, field);
3827 __ testptr(rax, rax);
3828 __ jcc(Assembler::notZero, nonnull);
3829 __ movptr(rax, rscratch1);
3830 __ movl(rcx, Address(rcx, rbx, Address::times_ptr,
3831 in_bytes(ConstantPoolCache::base_offset() +
3832 ConstantPoolCacheEntry::flags_offset())));
3833 __ andl(rcx, ConstantPoolCacheEntry::field_index_mask);
3834 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::uninitialized_instance_value_field),
3835 rax, rcx);
3836 __ bind(nonnull);
3837 __ verify_oop(rax);
3838 __ jmp(Done);
3839 __ bind(isFlattened);
3840 __ movl(rdx, Address(rcx, rbx, Address::times_ptr,
3841 in_bytes(ConstantPoolCache::base_offset() +
3842 ConstantPoolCacheEntry::flags_offset())));
3843 __ andl(rdx, ConstantPoolCacheEntry::field_index_mask);
3844 __ movptr(rcx, Address(rcx, rbx, Address::times_ptr,
3845 in_bytes(ConstantPoolCache::base_offset() +
3846 ConstantPoolCacheEntry::f1_offset())));
3847 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::read_flattened_field),
3848 rax, rdx, rcx);
3849 __ verify_oop(rax);
3850 __ bind(Done);
3851 }
3852 break;
3853 case Bytecodes::_fast_agetfield:
3854 do_oop_load(_masm, field, rax);
3855 __ verify_oop(rax);
3856 break;
3857 case Bytecodes::_fast_lgetfield:
3858 #ifdef _LP64
3859 __ access_load_at(T_LONG, IN_HEAP, noreg /* ltos */, field, noreg, noreg);
3860 #else
3861 __ stop("should not be rewritten");
3862 #endif
3863 break;
3864 case Bytecodes::_fast_igetfield:
3865 __ access_load_at(T_INT, IN_HEAP, rax, field, noreg, noreg);
3866 break;
3867 case Bytecodes::_fast_bgetfield:
3868 __ access_load_at(T_BYTE, IN_HEAP, rax, field, noreg, noreg);
3869 break;
3870 case Bytecodes::_fast_sgetfield:
3871 __ access_load_at(T_SHORT, IN_HEAP, rax, field, noreg, noreg);
3872 break;
3873 case Bytecodes::_fast_cgetfield:
3874 __ access_load_at(T_CHAR, IN_HEAP, rax, field, noreg, noreg);
3875 break;
3876 case Bytecodes::_fast_fgetfield:
3877 __ access_load_at(T_FLOAT, IN_HEAP, noreg /* ftos */, field, noreg, noreg);
3878 break;
3879 case Bytecodes::_fast_dgetfield:
3880 __ access_load_at(T_DOUBLE, IN_HEAP, noreg /* dtos */, field, noreg, noreg);
3881 break;
3882 default:
3883 ShouldNotReachHere();
3884 }
3885 // [jk] not needed currently
3886 // Label notVolatile;
3887 // __ testl(rdx, rdx);
3888 // __ jcc(Assembler::zero, notVolatile);
3889 // __ membar(Assembler::LoadLoad);
3890 // __ bind(notVolatile);
3891 }
3892
3893 void TemplateTable::fast_xaccess(TosState state) {
3894 transition(vtos, state);
3895
3896 // get receiver
3897 __ movptr(rax, aaddress(0));
3898 // access constant pool cache
3899 __ get_cache_and_index_at_bcp(rcx, rdx, 2);
3900 __ movptr(rbx,
3901 Address(rcx, rdx, Address::times_ptr,
3902 in_bytes(ConstantPoolCache::base_offset() +
3903 ConstantPoolCacheEntry::f2_offset())));
3904 // make sure exception is reported in correct bcp range (getfield is
3905 // next instruction)
3906 __ increment(rbcp);
3907 __ null_check(rax);
3908 const Address field = Address(rax, rbx, Address::times_1, 0*wordSize);
3909 switch (state) {
3910 case itos:
3911 __ access_load_at(T_INT, IN_HEAP, rax, field, noreg, noreg);
3912 break;
3913 case atos:
3914 do_oop_load(_masm, field, rax);
3915 __ verify_oop(rax);
3916 break;
3917 case ftos:
3918 __ access_load_at(T_FLOAT, IN_HEAP, noreg /* ftos */, field, noreg, noreg);
3919 break;
3920 default:
3921 ShouldNotReachHere();
3922 }
3923
3924 // [jk] not needed currently
3925 // Label notVolatile;
3926 // __ movl(rdx, Address(rcx, rdx, Address::times_8,
3927 // in_bytes(ConstantPoolCache::base_offset() +
3928 // ConstantPoolCacheEntry::flags_offset())));
3929 // __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift);
3930 // __ testl(rdx, 0x1);
3931 // __ jcc(Assembler::zero, notVolatile);
3932 // __ membar(Assembler::LoadLoad);
3933 // __ bind(notVolatile);
3934
3935 __ decrement(rbcp);
3936 }
3937
3938 //-----------------------------------------------------------------------------
3939 // Calls
3940
3941 void TemplateTable::count_calls(Register method, Register temp) {
3942 // implemented elsewhere
3943 ShouldNotReachHere();
3944 }
3945
3946 void TemplateTable::prepare_invoke(int byte_no,
3947 Register method, // linked method (or i-klass)
3948 Register index, // itable index, MethodType, etc.
3949 Register recv, // if caller wants to see it
3950 Register flags // if caller wants to test it
3951 ) {
3952 // determine flags
3953 const Bytecodes::Code code = bytecode();
3954 const bool is_invokeinterface = code == Bytecodes::_invokeinterface;
3955 const bool is_invokedynamic = code == Bytecodes::_invokedynamic;
3956 const bool is_invokehandle = code == Bytecodes::_invokehandle;
3957 const bool is_invokevirtual = code == Bytecodes::_invokevirtual;
3958 const bool is_invokespecial = code == Bytecodes::_invokespecial;
3959 const bool load_receiver = (recv != noreg);
3960 const bool save_flags = (flags != noreg);
3961 assert(load_receiver == (code != Bytecodes::_invokestatic && code != Bytecodes::_invokedynamic), "");
3962 assert(save_flags == (is_invokeinterface || is_invokevirtual), "need flags for vfinal");
3963 assert(flags == noreg || flags == rdx, "");
3964 assert(recv == noreg || recv == rcx, "");
3965
3966 // setup registers & access constant pool cache
3967 if (recv == noreg) recv = rcx;
3968 if (flags == noreg) flags = rdx;
3969 assert_different_registers(method, index, recv, flags);
3970
3971 // save 'interpreter return address'
3972 __ save_bcp();
3973
3974 load_invoke_cp_cache_entry(byte_no, method, index, flags, is_invokevirtual, false, is_invokedynamic);
3975
3976 // maybe push appendix to arguments (just before return address)
3977 if (is_invokedynamic || is_invokehandle) {
3978 Label L_no_push;
3979 __ testl(flags, (1 << ConstantPoolCacheEntry::has_appendix_shift));
3980 __ jcc(Assembler::zero, L_no_push);
3981 // Push the appendix as a trailing parameter.
3982 // This must be done before we get the receiver,
3983 // since the parameter_size includes it.
3984 __ push(rbx);
3985 __ mov(rbx, index);
3986 __ load_resolved_reference_at_index(index, rbx);
3987 __ pop(rbx);
3988 __ push(index); // push appendix (MethodType, CallSite, etc.)
3989 __ bind(L_no_push);
3990 }
3991
3992 // load receiver if needed (after appendix is pushed so parameter size is correct)
3993 // Note: no return address pushed yet
3994 if (load_receiver) {
3995 __ movl(recv, flags);
3996 __ andl(recv, ConstantPoolCacheEntry::parameter_size_mask);
3997 const int no_return_pc_pushed_yet = -1; // argument slot correction before we push return address
3998 const int receiver_is_at_end = -1; // back off one slot to get receiver
3999 Address recv_addr = __ argument_address(recv, no_return_pc_pushed_yet + receiver_is_at_end);
4000 __ movptr(recv, recv_addr);
4001 __ verify_oop(recv);
4002 }
4003
4004 if (save_flags) {
4005 __ movl(rbcp, flags);
4006 }
4007
4008 // compute return type
4009 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift);
4010 // Make sure we don't need to mask flags after the above shift
4011 ConstantPoolCacheEntry::verify_tos_state_shift();
4012 // load return address
4013 {
4014 const address table_addr = (address) Interpreter::invoke_return_entry_table_for(code);
4015 ExternalAddress table(table_addr);
4016 LP64_ONLY(__ lea(rscratch1, table));
4017 LP64_ONLY(__ movptr(flags, Address(rscratch1, flags, Address::times_ptr)));
4018 NOT_LP64(__ movptr(flags, ArrayAddress(table, Address(noreg, flags, Address::times_ptr))));
4019 }
4020
4021 // push return address
4022 __ push(flags);
4023
4024 // Restore flags value from the constant pool cache, and restore rsi
4025 // for later null checks. r13 is the bytecode pointer
4026 if (save_flags) {
4027 __ movl(flags, rbcp);
4028 __ restore_bcp();
4029 }
4030 }
4031
4032 void TemplateTable::invokevirtual_helper(Register index,
4033 Register recv,
4034 Register flags) {
4035 // Uses temporary registers rax, rdx
4036 assert_different_registers(index, recv, rax, rdx);
4037 assert(index == rbx, "");
4038 assert(recv == rcx, "");
4039
4040 // Test for an invoke of a final method
4041 Label notFinal;
4042 __ movl(rax, flags);
4043 __ andl(rax, (1 << ConstantPoolCacheEntry::is_vfinal_shift));
4044 __ jcc(Assembler::zero, notFinal);
4045
4046 const Register method = index; // method must be rbx
4047 assert(method == rbx,
4048 "Method* must be rbx for interpreter calling convention");
4049
4050 // do the call - the index is actually the method to call
4051 // that is, f2 is a vtable index if !is_vfinal, else f2 is a Method*
4052
4053 // It's final, need a null check here!
4054 __ null_check(recv);
4055
4056 // profile this call
4057 __ profile_final_call(rax);
4058 __ profile_arguments_type(rax, method, rbcp, true);
4059
4060 __ jump_from_interpreted(method, rax);
4061
4062 __ bind(notFinal);
4063
4064 // get receiver klass
4065 __ null_check(recv, oopDesc::klass_offset_in_bytes());
4066 __ load_klass(rax, recv);
4067
4068 // profile this call
4069 __ profile_virtual_call(rax, rlocals, rdx);
4070 // get target Method* & entry point
4071 __ lookup_virtual_method(rax, index, method);
4072 __ profile_called_method(method, rdx, rbcp);
4073
4074 __ profile_arguments_type(rdx, method, rbcp, true);
4075 __ jump_from_interpreted(method, rdx);
4076 }
4077
4078 void TemplateTable::invokevirtual(int byte_no) {
4079 transition(vtos, vtos);
4080 assert(byte_no == f2_byte, "use this argument");
4081 prepare_invoke(byte_no,
4082 rbx, // method or vtable index
4083 noreg, // unused itable index
4084 rcx, rdx); // recv, flags
4085
4086 // rbx: index
4087 // rcx: receiver
4088 // rdx: flags
4089
4090 invokevirtual_helper(rbx, rcx, rdx);
4091 }
4092
4093 void TemplateTable::invokespecial(int byte_no) {
4094 transition(vtos, vtos);
4095 assert(byte_no == f1_byte, "use this argument");
4096 prepare_invoke(byte_no, rbx, noreg, // get f1 Method*
4097 rcx); // get receiver also for null check
4098 __ verify_oop(rcx);
4099 __ null_check(rcx);
4100 // do the call
4101 __ profile_call(rax);
4102 __ profile_arguments_type(rax, rbx, rbcp, false);
4103 __ jump_from_interpreted(rbx, rax);
4104 }
4105
4106 void TemplateTable::invokestatic(int byte_no) {
4107 transition(vtos, vtos);
4108 assert(byte_no == f1_byte, "use this argument");
4109 prepare_invoke(byte_no, rbx); // get f1 Method*
4110 // do the call
4111 __ profile_call(rax);
4112 __ profile_arguments_type(rax, rbx, rbcp, false);
4113 __ jump_from_interpreted(rbx, rax);
4114 }
4115
4116
4117 void TemplateTable::fast_invokevfinal(int byte_no) {
4118 transition(vtos, vtos);
4119 assert(byte_no == f2_byte, "use this argument");
4120 __ stop("fast_invokevfinal not used on x86");
4121 }
4122
4123
4124 void TemplateTable::invokeinterface(int byte_no) {
4125 transition(vtos, vtos);
4126 assert(byte_no == f1_byte, "use this argument");
4127 prepare_invoke(byte_no, rax, rbx, // get f1 Klass*, f2 Method*
4128 rcx, rdx); // recv, flags
4129
4130 // rax: reference klass (from f1) if interface method
4131 // rbx: method (from f2)
4132 // rcx: receiver
4133 // rdx: flags
4134
4135 // First check for Object case, then private interface method,
4136 // then regular interface method.
4137
4138 // Special case of invokeinterface called for virtual method of
4139 // java.lang.Object. See cpCache.cpp for details.
4140 Label notObjectMethod;
4141 __ movl(rlocals, rdx);
4142 __ andl(rlocals, (1 << ConstantPoolCacheEntry::is_forced_virtual_shift));
4143 __ jcc(Assembler::zero, notObjectMethod);
4144 invokevirtual_helper(rbx, rcx, rdx);
4145 // no return from above
4146 __ bind(notObjectMethod);
4147
4148 Label no_such_interface; // for receiver subtype check
4149 Register recvKlass; // used for exception processing
4150
4151 // Check for private method invocation - indicated by vfinal
4152 Label notVFinal;
4153 __ movl(rlocals, rdx);
4154 __ andl(rlocals, (1 << ConstantPoolCacheEntry::is_vfinal_shift));
4155 __ jcc(Assembler::zero, notVFinal);
4156
4157 // Get receiver klass into rlocals - also a null check
4158 __ null_check(rcx, oopDesc::klass_offset_in_bytes());
4159 __ load_klass(rlocals, rcx);
4160
4161 Label subtype;
4162 __ check_klass_subtype(rlocals, rax, rbcp, subtype);
4163 // If we get here the typecheck failed
4164 recvKlass = rdx;
4165 __ mov(recvKlass, rlocals); // shuffle receiver class for exception use
4166 __ jmp(no_such_interface);
4167
4168 __ bind(subtype);
4169
4170 // do the call - rbx is actually the method to call
4171
4172 __ profile_final_call(rdx);
4173 __ profile_arguments_type(rdx, rbx, rbcp, true);
4174
4175 __ jump_from_interpreted(rbx, rdx);
4176 // no return from above
4177 __ bind(notVFinal);
4178
4179 // Get receiver klass into rdx - also a null check
4180 __ restore_locals(); // restore r14
4181 __ null_check(rcx, oopDesc::klass_offset_in_bytes());
4182 __ load_klass(rdx, rcx);
4183
4184 Label no_such_method;
4185
4186 // Preserve method for throw_AbstractMethodErrorVerbose.
4187 __ mov(rcx, rbx);
4188 // Receiver subtype check against REFC.
4189 // Superklass in rax. Subklass in rdx. Blows rcx, rdi.
4190 __ lookup_interface_method(// inputs: rec. class, interface, itable index
4191 rdx, rax, noreg,
4192 // outputs: scan temp. reg, scan temp. reg
4193 rbcp, rlocals,
4194 no_such_interface,
4195 /*return_method=*/false);
4196
4197 // profile this call
4198 __ restore_bcp(); // rbcp was destroyed by receiver type check
4199 __ profile_virtual_call(rdx, rbcp, rlocals);
4200
4201 // Get declaring interface class from method, and itable index
4202 __ load_method_holder(rax, rbx);
4203 __ movl(rbx, Address(rbx, Method::itable_index_offset()));
4204 __ subl(rbx, Method::itable_index_max);
4205 __ negl(rbx);
4206
4207 // Preserve recvKlass for throw_AbstractMethodErrorVerbose.
4208 __ mov(rlocals, rdx);
4209 __ lookup_interface_method(// inputs: rec. class, interface, itable index
4210 rlocals, rax, rbx,
4211 // outputs: method, scan temp. reg
4212 rbx, rbcp,
4213 no_such_interface);
4214
4215 // rbx: Method* to call
4216 // rcx: receiver
4217 // Check for abstract method error
4218 // Note: This should be done more efficiently via a throw_abstract_method_error
4219 // interpreter entry point and a conditional jump to it in case of a null
4220 // method.
4221 __ testptr(rbx, rbx);
4222 __ jcc(Assembler::zero, no_such_method);
4223
4224 __ profile_called_method(rbx, rbcp, rdx);
4225 __ profile_arguments_type(rdx, rbx, rbcp, true);
4226
4227 // do the call
4228 // rcx: receiver
4229 // rbx,: Method*
4230 __ jump_from_interpreted(rbx, rdx);
4231 __ should_not_reach_here();
4232
4233 // exception handling code follows...
4234 // note: must restore interpreter registers to canonical
4235 // state for exception handling to work correctly!
4236
4237 __ bind(no_such_method);
4238 // throw exception
4239 __ pop(rbx); // pop return address (pushed by prepare_invoke)
4240 __ restore_bcp(); // rbcp must be correct for exception handler (was destroyed)
4241 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
4242 // Pass arguments for generating a verbose error message.
4243 #ifdef _LP64
4244 recvKlass = c_rarg1;
4245 Register method = c_rarg2;
4246 if (recvKlass != rdx) { __ movq(recvKlass, rdx); }
4247 if (method != rcx) { __ movq(method, rcx); }
4248 #else
4249 recvKlass = rdx;
4250 Register method = rcx;
4251 #endif
4252 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodErrorVerbose),
4253 recvKlass, method);
4254 // The call_VM checks for exception, so we should never return here.
4255 __ should_not_reach_here();
4256
4257 __ bind(no_such_interface);
4258 // throw exception
4259 __ pop(rbx); // pop return address (pushed by prepare_invoke)
4260 __ restore_bcp(); // rbcp must be correct for exception handler (was destroyed)
4261 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
4262 // Pass arguments for generating a verbose error message.
4263 LP64_ONLY( if (recvKlass != rdx) { __ movq(recvKlass, rdx); } )
4264 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose),
4265 recvKlass, rax);
4266 // the call_VM checks for exception, so we should never return here.
4267 __ should_not_reach_here();
4268 }
4269
4270 void TemplateTable::invokehandle(int byte_no) {
4271 transition(vtos, vtos);
4272 assert(byte_no == f1_byte, "use this argument");
4273 const Register rbx_method = rbx;
4274 const Register rax_mtype = rax;
4275 const Register rcx_recv = rcx;
4276 const Register rdx_flags = rdx;
4277
4278 prepare_invoke(byte_no, rbx_method, rax_mtype, rcx_recv);
4279 __ verify_method_ptr(rbx_method);
4280 __ verify_oop(rcx_recv);
4281 __ null_check(rcx_recv);
4282
4283 // rax: MethodType object (from cpool->resolved_references[f1], if necessary)
4284 // rbx: MH.invokeExact_MT method (from f2)
4285
4286 // Note: rax_mtype is already pushed (if necessary) by prepare_invoke
4287
4288 // FIXME: profile the LambdaForm also
4289 __ profile_final_call(rax);
4290 __ profile_arguments_type(rdx, rbx_method, rbcp, true);
4291
4292 __ jump_from_interpreted(rbx_method, rdx);
4293 }
4294
4295 void TemplateTable::invokedynamic(int byte_no) {
4296 transition(vtos, vtos);
4297 assert(byte_no == f1_byte, "use this argument");
4298
4299 const Register rbx_method = rbx;
4300 const Register rax_callsite = rax;
4301
4302 prepare_invoke(byte_no, rbx_method, rax_callsite);
4303
4304 // rax: CallSite object (from cpool->resolved_references[f1])
4305 // rbx: MH.linkToCallSite method (from f2)
4306
4307 // Note: rax_callsite is already pushed by prepare_invoke
4308
4309 // %%% should make a type profile for any invokedynamic that takes a ref argument
4310 // profile this call
4311 __ profile_call(rbcp);
4312 __ profile_arguments_type(rdx, rbx_method, rbcp, false);
4313
4314 __ verify_oop(rax_callsite);
4315
4316 __ jump_from_interpreted(rbx_method, rdx);
4317 }
4318
4319 //-----------------------------------------------------------------------------
4320 // Allocation
4321
4322 void TemplateTable::_new() {
4323 transition(vtos, atos);
4324 __ get_unsigned_2_byte_index_at_bcp(rdx, 1);
4325 Label slow_case;
4326 Label slow_case_no_pop;
4327 Label done;
4328 Label initialize_header;
4329 Label initialize_object; // including clearing the fields
4330
4331 __ get_cpool_and_tags(rcx, rax);
4332
4333 // Make sure the class we're about to instantiate has been resolved.
4334 // This is done before loading InstanceKlass to be consistent with the order
4335 // how Constant Pool is updated (see ConstantPool::klass_at_put)
4336 const int tags_offset = Array<u1>::base_offset_in_bytes();
4337 __ cmpb(Address(rax, rdx, Address::times_1, tags_offset), JVM_CONSTANT_Class);
4338 __ jcc(Assembler::notEqual, slow_case_no_pop);
4339
4340 // get InstanceKlass
4341 __ load_resolved_klass_at_index(rcx, rcx, rdx);
4342 __ push(rcx); // save the contexts of klass for initializing the header
4343
4344 // make sure klass is initialized & doesn't have finalizer
4345 // make sure klass is fully initialized
4346 __ cmpb(Address(rcx, InstanceKlass::init_state_offset()), InstanceKlass::fully_initialized);
4347 __ jcc(Assembler::notEqual, slow_case);
4348
4349 // get instance_size in InstanceKlass (scaled to a count of bytes)
4350 __ movl(rdx, Address(rcx, Klass::layout_helper_offset()));
4351 // test to see if it has a finalizer or is malformed in some way
4352 __ testl(rdx, Klass::_lh_instance_slow_path_bit);
4353 __ jcc(Assembler::notZero, slow_case);
4354
4355 // Allocate the instance:
4356 // If TLAB is enabled:
4357 // Try to allocate in the TLAB.
4358 // If fails, go to the slow path.
4359 // Else If inline contiguous allocations are enabled:
4360 // Try to allocate in eden.
4361 // If fails due to heap end, go to slow path.
4362 //
4363 // If TLAB is enabled OR inline contiguous is enabled:
4364 // Initialize the allocation.
4365 // Exit.
4366 //
4367 // Go to slow path.
4368
4369 const bool allow_shared_alloc =
4370 Universe::heap()->supports_inline_contig_alloc();
4371
4372 const Register thread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
4373 #ifndef _LP64
4374 if (UseTLAB || allow_shared_alloc) {
4375 __ get_thread(thread);
4376 }
4377 #endif // _LP64
4378
4379 if (UseTLAB) {
4380 __ tlab_allocate(thread, rax, rdx, 0, rcx, rbx, slow_case);
4381 if (ZeroTLAB) {
4382 // the fields have been already cleared
4383 __ jmp(initialize_header);
4384 } else {
4385 // initialize both the header and fields
4386 __ jmp(initialize_object);
4387 }
4388 } else {
4389 // Allocation in the shared Eden, if allowed.
4390 //
4391 // rdx: instance size in bytes
4392 __ eden_allocate(thread, rax, rdx, 0, rbx, slow_case);
4393 }
4394
4395 // If UseTLAB or allow_shared_alloc are true, the object is created above and
4396 // there is an initialize need. Otherwise, skip and go to the slow path.
4397 if (UseTLAB || allow_shared_alloc) {
4398 // The object is initialized before the header. If the object size is
4399 // zero, go directly to the header initialization.
4400 __ bind(initialize_object);
4401 __ decrement(rdx, sizeof(oopDesc));
4402 __ jcc(Assembler::zero, initialize_header);
4403
4404 // Initialize topmost object field, divide rdx by 8, check if odd and
4405 // test if zero.
4406 __ xorl(rcx, rcx); // use zero reg to clear memory (shorter code)
4407 __ shrl(rdx, LogBytesPerLong); // divide by 2*oopSize and set carry flag if odd
4408
4409 // rdx must have been multiple of 8
4410 #ifdef ASSERT
4411 // make sure rdx was multiple of 8
4412 Label L;
4413 // Ignore partial flag stall after shrl() since it is debug VM
4414 __ jcc(Assembler::carryClear, L);
4415 __ stop("object size is not multiple of 2 - adjust this code");
4416 __ bind(L);
4417 // rdx must be > 0, no extra check needed here
4418 #endif
4419
4420 // initialize remaining object fields: rdx was a multiple of 8
4421 { Label loop;
4422 __ bind(loop);
4423 __ movptr(Address(rax, rdx, Address::times_8, sizeof(oopDesc) - 1*oopSize), rcx);
4424 NOT_LP64(__ movptr(Address(rax, rdx, Address::times_8, sizeof(oopDesc) - 2*oopSize), rcx));
4425 __ decrement(rdx);
4426 __ jcc(Assembler::notZero, loop);
4427 }
4428
4429 // initialize object header only.
4430 __ bind(initialize_header);
4431 if (UseBiasedLocking) {
4432 __ pop(rcx); // get saved klass back in the register.
4433 __ movptr(rbx, Address(rcx, Klass::prototype_header_offset()));
4434 __ movptr(Address(rax, oopDesc::mark_offset_in_bytes ()), rbx);
4435 } else {
4436 __ movptr(Address(rax, oopDesc::mark_offset_in_bytes ()),
4437 (intptr_t)markOopDesc::prototype()); // header
4438 __ pop(rcx); // get saved klass back in the register.
4439 }
4440 #ifdef _LP64
4441 __ xorl(rsi, rsi); // use zero reg to clear memory (shorter code)
4442 __ store_klass_gap(rax, rsi); // zero klass gap for compressed oops
4443 #endif
4444 __ store_klass(rax, rcx); // klass
4445
4446 {
4447 SkipIfEqual skip_if(_masm, &DTraceAllocProbes, 0);
4448 // Trigger dtrace event for fastpath
4449 __ push(atos);
4450 __ call_VM_leaf(
4451 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc), rax);
4452 __ pop(atos);
4453 }
4454
4455 __ jmp(done);
4456 }
4457
4458 // slow case
4459 __ bind(slow_case);
4460 __ pop(rcx); // restore stack pointer to what it was when we came in.
4461 __ bind(slow_case_no_pop);
4462
4463 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rax);
4464 Register rarg2 = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
4465
4466 __ get_constant_pool(rarg1);
4467 __ get_unsigned_2_byte_index_at_bcp(rarg2, 1);
4468 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::_new), rarg1, rarg2);
4469 __ verify_oop(rax);
4470
4471 // continue
4472 __ bind(done);
4473 }
4474
4475 void TemplateTable::defaultvalue() {
4476 transition(vtos, atos);
4477
4478 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
4479 Register rarg2 = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
4480
4481 __ get_unsigned_2_byte_index_at_bcp(rarg2, 1);
4482 __ get_constant_pool(rarg1);
4483
4484 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::defaultvalue),
4485 rarg1, rarg2);
4486 __ verify_oop(rax);
4487 }
4488
4489 void TemplateTable::newarray() {
4490 transition(itos, atos);
4491 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
4492 __ load_unsigned_byte(rarg1, at_bcp(1));
4493 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::newarray),
4494 rarg1, rax);
4495 }
4496
4497 void TemplateTable::anewarray() {
4498 transition(itos, atos);
4499
4500 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
4501 Register rarg2 = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
4502
4503 __ get_unsigned_2_byte_index_at_bcp(rarg2, 1);
4504 __ get_constant_pool(rarg1);
4505 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::anewarray),
4506 rarg1, rarg2, rax);
4507 }
4508
4509 void TemplateTable::arraylength() {
4510 transition(atos, itos);
4511 __ null_check(rax, arrayOopDesc::length_offset_in_bytes());
4512 __ movl(rax, Address(rax, arrayOopDesc::length_offset_in_bytes()));
4513 }
4514
4515 void TemplateTable::checkcast() {
4516 transition(atos, atos);
4517 Label done, is_null, ok_is_subtype, quicked, resolved;
4518 __ testptr(rax, rax); // object is in rax
4519 __ jcc(Assembler::zero, is_null);
4520
4521 // Get cpool & tags index
4522 __ get_cpool_and_tags(rcx, rdx); // rcx=cpool, rdx=tags array
4523 __ get_unsigned_2_byte_index_at_bcp(rbx, 1); // rbx=index
4524 // See if bytecode has already been quicked
4525 __ movzbl(rdx, Address(rdx, rbx,
4526 Address::times_1,
4527 Array<u1>::base_offset_in_bytes()));
4528 __ andl (rdx, ~JVM_CONSTANT_QDescBit);
4529 __ cmpl(rdx, JVM_CONSTANT_Class);
4530 __ jcc(Assembler::equal, quicked);
4531 __ push(atos); // save receiver for result, and for GC
4532 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc));
4533
4534 // vm_result_2 has metadata result
4535 #ifndef _LP64
4536 // borrow rdi from locals
4537 __ get_thread(rdi);
4538 __ get_vm_result_2(rax, rdi);
4539 __ restore_locals();
4540 #else
4541 __ get_vm_result_2(rax, r15_thread);
4542 #endif
4543
4544 __ pop_ptr(rdx); // restore receiver
4545 __ jmpb(resolved);
4546
4547 // Get superklass in rax and subklass in rbx
4548 __ bind(quicked);
4549 __ mov(rdx, rax); // Save object in rdx; rax needed for subtype check
4550 __ load_resolved_klass_at_index(rax, rcx, rbx);
4551
4552 __ bind(resolved);
4553 __ load_klass(rbx, rdx);
4554
4555 // Generate subtype check. Blows rcx, rdi. Object in rdx.
4556 // Superklass in rax. Subklass in rbx.
4557 __ gen_subtype_check(rbx, ok_is_subtype);
4558
4559 // Come here on failure
4560 __ push_ptr(rdx);
4561 // object is at TOS
4562 __ jump(ExternalAddress(Interpreter::_throw_ClassCastException_entry));
4563
4564 // Come here on success
4565 __ bind(ok_is_subtype);
4566 __ mov(rax, rdx); // Restore object in rdx
4567 __ jmp(done);
4568
4569 __ bind(is_null);
4570
4571 // Collect counts on whether this check-cast sees NULLs a lot or not.
4572 if (ProfileInterpreter) {
4573 __ profile_null_seen(rcx);
4574 }
4575
4576 if (EnableValhalla) {
4577 // Get cpool & tags index
4578 __ get_cpool_and_tags(rcx, rdx); // rcx=cpool, rdx=tags array
4579 __ get_unsigned_2_byte_index_at_bcp(rbx, 1); // rbx=index
4580 // See if CP entry is a Q-descriptor
4581 __ movzbl(rcx, Address(rdx, rbx,
4582 Address::times_1,
4583 Array<u1>::base_offset_in_bytes()));
4584 __ andl (rcx, JVM_CONSTANT_QDescBit);
4585 __ cmpl(rcx, JVM_CONSTANT_QDescBit);
4586 __ jcc(Assembler::notEqual, done);
4587 __ jump(ExternalAddress(Interpreter::_throw_NullPointerException_entry));
4588 }
4589
4590 __ bind(done);
4591 }
4592
4593 void TemplateTable::instanceof() {
4594 transition(atos, itos);
4595 Label done, is_null, ok_is_subtype, quicked, resolved;
4596 __ testptr(rax, rax);
4597 __ jcc(Assembler::zero, is_null);
4598
4599 // Get cpool & tags index
4600 __ get_cpool_and_tags(rcx, rdx); // rcx=cpool, rdx=tags array
4601 __ get_unsigned_2_byte_index_at_bcp(rbx, 1); // rbx=index
4602 // See if bytecode has already been quicked
4603 __ movzbl(rdx, Address(rdx, rbx,
4604 Address::times_1,
4605 Array<u1>::base_offset_in_bytes()));
4606 __ andl (rdx, ~JVM_CONSTANT_QDescBit);
4607 __ cmpl(rdx, JVM_CONSTANT_Class);
4608 __ jcc(Assembler::equal, quicked);
4609
4610 __ push(atos); // save receiver for result, and for GC
4611 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc));
4612 // vm_result_2 has metadata result
4613
4614 #ifndef _LP64
4615 // borrow rdi from locals
4616 __ get_thread(rdi);
4617 __ get_vm_result_2(rax, rdi);
4618 __ restore_locals();
4619 #else
4620 __ get_vm_result_2(rax, r15_thread);
4621 #endif
4622
4623 __ pop_ptr(rdx); // restore receiver
4624 __ verify_oop(rdx);
4625 __ load_klass(rdx, rdx);
4626 __ jmpb(resolved);
4627
4628 // Get superklass in rax and subklass in rdx
4629 __ bind(quicked);
4630 __ load_klass(rdx, rax);
4631 __ load_resolved_klass_at_index(rax, rcx, rbx);
4632
4633 __ bind(resolved);
4634
4635 // Generate subtype check. Blows rcx, rdi
4636 // Superklass in rax. Subklass in rdx.
4637 __ gen_subtype_check(rdx, ok_is_subtype);
4638
4639 // Come here on failure
4640 __ xorl(rax, rax);
4641 __ jmpb(done);
4642 // Come here on success
4643 __ bind(ok_is_subtype);
4644 __ movl(rax, 1);
4645
4646 // Collect counts on whether this test sees NULLs a lot or not.
4647 if (ProfileInterpreter) {
4648 __ jmp(done);
4649 __ bind(is_null);
4650 __ profile_null_seen(rcx);
4651 } else {
4652 __ bind(is_null); // same as 'done'
4653 }
4654 __ bind(done);
4655 // rax = 0: obj == NULL or obj is not an instanceof the specified klass
4656 // rax = 1: obj != NULL and obj is an instanceof the specified klass
4657 }
4658
4659 //----------------------------------------------------------------------------------------------------
4660 // Breakpoints
4661 void TemplateTable::_breakpoint() {
4662 // Note: We get here even if we are single stepping..
4663 // jbug insists on setting breakpoints at every bytecode
4664 // even if we are in single step mode.
4665
4666 transition(vtos, vtos);
4667
4668 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
4669
4670 // get the unpatched byte code
4671 __ get_method(rarg);
4672 __ call_VM(noreg,
4673 CAST_FROM_FN_PTR(address,
4674 InterpreterRuntime::get_original_bytecode_at),
4675 rarg, rbcp);
4676 __ mov(rbx, rax); // why?
4677
4678 // post the breakpoint event
4679 __ get_method(rarg);
4680 __ call_VM(noreg,
4681 CAST_FROM_FN_PTR(address, InterpreterRuntime::_breakpoint),
4682 rarg, rbcp);
4683
4684 // complete the execution of original bytecode
4685 __ dispatch_only_normal(vtos);
4686 }
4687
4688 //-----------------------------------------------------------------------------
4689 // Exceptions
4690
4691 void TemplateTable::athrow() {
4692 transition(atos, vtos);
4693 __ null_check(rax);
4694 __ jump(ExternalAddress(Interpreter::throw_exception_entry()));
4695 }
4696
4697 //-----------------------------------------------------------------------------
4698 // Synchronization
4699 //
4700 // Note: monitorenter & exit are symmetric routines; which is reflected
4701 // in the assembly code structure as well
4702 //
4703 // Stack layout:
4704 //
4705 // [expressions ] <--- rsp = expression stack top
4706 // ..
4707 // [expressions ]
4708 // [monitor entry] <--- monitor block top = expression stack bot
4709 // ..
4710 // [monitor entry]
4711 // [frame data ] <--- monitor block bot
4712 // ...
4713 // [saved rbp ] <--- rbp
4714 void TemplateTable::monitorenter() {
4715 transition(atos, vtos);
4716
4717 // check for NULL object
4718 __ null_check(rax);
4719
4720 __ resolve(IS_NOT_NULL, rax);
4721
4722 const int is_value_mask = markOopDesc::always_locked_pattern;
4723 Label has_identity;
4724 __ movptr(rbx, Address(rax, oopDesc::mark_offset_in_bytes()));
4725 __ andptr(rbx, is_value_mask);
4726 __ cmpl(rbx, is_value_mask);
4727 __ jcc(Assembler::notEqual, has_identity);
4728 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
4729 InterpreterRuntime::throw_illegal_monitor_state_exception));
4730 __ should_not_reach_here();
4731 __ bind(has_identity);
4732
4733 const Address monitor_block_top(
4734 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
4735 const Address monitor_block_bot(
4736 rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
4737 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
4738
4739 Label allocated;
4740
4741 Register rtop = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
4742 Register rbot = LP64_ONLY(c_rarg2) NOT_LP64(rbx);
4743 Register rmon = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
4744
4745 // initialize entry pointer
4746 __ xorl(rmon, rmon); // points to free slot or NULL
4747
4748 // find a free slot in the monitor block (result in rmon)
4749 {
4750 Label entry, loop, exit;
4751 __ movptr(rtop, monitor_block_top); // points to current entry,
4752 // starting with top-most entry
4753 __ lea(rbot, monitor_block_bot); // points to word before bottom
4754 // of monitor block
4755 __ jmpb(entry);
4756
4757 __ bind(loop);
4758 // check if current entry is used
4759 __ cmpptr(Address(rtop, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL_WORD);
4760 // if not used then remember entry in rmon
4761 __ cmovptr(Assembler::equal, rmon, rtop); // cmov => cmovptr
4762 // check if current entry is for same object
4763 __ cmpptr(rax, Address(rtop, BasicObjectLock::obj_offset_in_bytes()));
4764 // if same object then stop searching
4765 __ jccb(Assembler::equal, exit);
4766 // otherwise advance to next entry
4767 __ addptr(rtop, entry_size);
4768 __ bind(entry);
4769 // check if bottom reached
4770 __ cmpptr(rtop, rbot);
4771 // if not at bottom then check this entry
4772 __ jcc(Assembler::notEqual, loop);
4773 __ bind(exit);
4774 }
4775
4776 __ testptr(rmon, rmon); // check if a slot has been found
4777 __ jcc(Assembler::notZero, allocated); // if found, continue with that one
4778
4779 // allocate one if there's no free slot
4780 {
4781 Label entry, loop;
4782 // 1. compute new pointers // rsp: old expression stack top
4783 __ movptr(rmon, monitor_block_bot); // rmon: old expression stack bottom
4784 __ subptr(rsp, entry_size); // move expression stack top
4785 __ subptr(rmon, entry_size); // move expression stack bottom
4786 __ mov(rtop, rsp); // set start value for copy loop
4787 __ movptr(monitor_block_bot, rmon); // set new monitor block bottom
4788 __ jmp(entry);
4789 // 2. move expression stack contents
4790 __ bind(loop);
4791 __ movptr(rbot, Address(rtop, entry_size)); // load expression stack
4792 // word from old location
4793 __ movptr(Address(rtop, 0), rbot); // and store it at new location
4794 __ addptr(rtop, wordSize); // advance to next word
4795 __ bind(entry);
4796 __ cmpptr(rtop, rmon); // check if bottom reached
4797 __ jcc(Assembler::notEqual, loop); // if not at bottom then
4798 // copy next word
4799 }
4800
4801 // call run-time routine
4802 // rmon: points to monitor entry
4803 __ bind(allocated);
4804
4805 // Increment bcp to point to the next bytecode, so exception
4806 // handling for async. exceptions work correctly.
4807 // The object has already been poped from the stack, so the
4808 // expression stack looks correct.
4809 __ increment(rbcp);
4810
4811 // store object
4812 __ movptr(Address(rmon, BasicObjectLock::obj_offset_in_bytes()), rax);
4813 __ lock_object(rmon);
4814
4815 // check to make sure this monitor doesn't cause stack overflow after locking
4816 __ save_bcp(); // in case of exception
4817 __ generate_stack_overflow_check(0);
4818
4819 // The bcp has already been incremented. Just need to dispatch to
4820 // next instruction.
4821 __ dispatch_next(vtos);
4822 }
4823
4824 void TemplateTable::monitorexit() {
4825 transition(atos, vtos);
4826
4827 // check for NULL object
4828 __ null_check(rax);
4829
4830 __ resolve(IS_NOT_NULL, rax);
4831
4832 const int is_value_mask = markOopDesc::always_locked_pattern;
4833 Label has_identity;
4834 __ movptr(rbx, Address(rax, oopDesc::mark_offset_in_bytes()));
4835 __ andptr(rbx, is_value_mask);
4836 __ cmpl(rbx, is_value_mask);
4837 __ jcc(Assembler::notEqual, has_identity);
4838 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
4839 InterpreterRuntime::throw_illegal_monitor_state_exception));
4840 __ should_not_reach_here();
4841 __ bind(has_identity);
4842
4843 const Address monitor_block_top(
4844 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
4845 const Address monitor_block_bot(
4846 rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
4847 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
4848
4849 Register rtop = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
4850 Register rbot = LP64_ONLY(c_rarg2) NOT_LP64(rbx);
4851
4852 Label found;
4853
4854 // find matching slot
4855 {
4856 Label entry, loop;
4857 __ movptr(rtop, monitor_block_top); // points to current entry,
4858 // starting with top-most entry
4859 __ lea(rbot, monitor_block_bot); // points to word before bottom
4860 // of monitor block
4861 __ jmpb(entry);
4862
4863 __ bind(loop);
4864 // check if current entry is for same object
4865 __ cmpptr(rax, Address(rtop, BasicObjectLock::obj_offset_in_bytes()));
4866 // if same object then stop searching
4867 __ jcc(Assembler::equal, found);
4868 // otherwise advance to next entry
4869 __ addptr(rtop, entry_size);
4870 __ bind(entry);
4871 // check if bottom reached
4872 __ cmpptr(rtop, rbot);
4873 // if not at bottom then check this entry
4874 __ jcc(Assembler::notEqual, loop);
4875 }
4876
4877 // error handling. Unlocking was not block-structured
4878 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
4879 InterpreterRuntime::throw_illegal_monitor_state_exception));
4880 __ should_not_reach_here();
4881
4882 // call run-time routine
4883 __ bind(found);
4884 __ push_ptr(rax); // make sure object is on stack (contract with oopMaps)
4885 __ unlock_object(rtop);
4886 __ pop_ptr(rax); // discard object
4887 }
4888
4889 // Wide instructions
4890 void TemplateTable::wide() {
4891 transition(vtos, vtos);
4892 __ load_unsigned_byte(rbx, at_bcp(1));
4893 ExternalAddress wtable((address)Interpreter::_wentry_point);
4894 __ jump(ArrayAddress(wtable, Address(noreg, rbx, Address::times_ptr)));
4895 // Note: the rbcp increment step is part of the individual wide bytecode implementations
4896 }
4897
4898 // Multi arrays
4899 void TemplateTable::multianewarray() {
4900 transition(vtos, atos);
4901
4902 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rax);
4903 __ load_unsigned_byte(rax, at_bcp(3)); // get number of dimensions
4904 // last dim is on top of stack; we want address of first one:
4905 // first_addr = last_addr + (ndims - 1) * stackElementSize - 1*wordsize
4906 // the latter wordSize to point to the beginning of the array.
4907 __ lea(rarg, Address(rsp, rax, Interpreter::stackElementScale(), -wordSize));
4908 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::multianewarray), rarg);
4909 __ load_unsigned_byte(rbx, at_bcp(3));
4910 __ lea(rsp, Address(rsp, rbx, Interpreter::stackElementScale())); // get rid of counts
4911 }