1 /*
2 * Copyright (c) 1997, 2017, 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 "interpreter/interpreter.hpp"
28 #include "interpreter/interpreterRuntime.hpp"
29 #include "interpreter/interp_masm.hpp"
30 #include "interpreter/templateTable.hpp"
31 #include "memory/universe.inline.hpp"
32 #include "oops/methodData.hpp"
33 #include "oops/objArrayKlass.hpp"
34 #include "oops/oop.inline.hpp"
35 #include "prims/methodHandles.hpp"
36 #include "runtime/sharedRuntime.hpp"
37 #include "runtime/stubRoutines.hpp"
38 #include "runtime/synchronizer.hpp"
39 #include "utilities/macros.hpp"
40
41 #define __ _masm->
42
43 // Global Register Names
44 static const Register rbcp = LP64_ONLY(r13) NOT_LP64(rsi);
45 static const Register rlocals = LP64_ONLY(r14) NOT_LP64(rdi);
46
47 // Platform-dependent initialization
48 void TemplateTable::pd_initialize() {
49 // No x86 specific initialization
50 }
51
52 // Address Computation: local variables
53 static inline Address iaddress(int n) {
54 return Address(rlocals, Interpreter::local_offset_in_bytes(n));
55 }
56
57 static inline Address laddress(int n) {
58 return iaddress(n + 1);
59 }
60
61 #ifndef _LP64
62 static inline Address haddress(int n) {
63 return iaddress(n + 0);
64 }
65 #endif
66
67 static inline Address faddress(int n) {
68 return iaddress(n);
69 }
70
71 static inline Address daddress(int n) {
72 return laddress(n);
73 }
74
75 static inline Address aaddress(int n) {
76 return iaddress(n);
77 }
78
79 static inline Address iaddress(Register r) {
80 return Address(rlocals, r, Address::times_ptr);
81 }
82
83 static inline Address laddress(Register r) {
84 return Address(rlocals, r, Address::times_ptr, Interpreter::local_offset_in_bytes(1));
85 }
86
87 #ifndef _LP64
88 static inline Address haddress(Register r) {
89 return Address(rlocals, r, Interpreter::stackElementScale(), Interpreter::local_offset_in_bytes(0));
90 }
91 #endif
92
93 static inline Address faddress(Register r) {
94 return iaddress(r);
95 }
96
97 static inline Address daddress(Register r) {
98 return laddress(r);
99 }
100
101 static inline Address aaddress(Register r) {
102 return iaddress(r);
103 }
104
105
106 // expression stack
107 // (Note: Must not use symmetric equivalents at_rsp_m1/2 since they store
108 // data beyond the rsp which is potentially unsafe in an MT environment;
109 // an interrupt may overwrite that data.)
110 static inline Address at_rsp () {
111 return Address(rsp, 0);
112 }
113
114 // At top of Java expression stack which may be different than esp(). It
115 // isn't for category 1 objects.
116 static inline Address at_tos () {
117 return Address(rsp, Interpreter::expr_offset_in_bytes(0));
118 }
119
120 static inline Address at_tos_p1() {
121 return Address(rsp, Interpreter::expr_offset_in_bytes(1));
122 }
123
124 static inline Address at_tos_p2() {
125 return Address(rsp, Interpreter::expr_offset_in_bytes(2));
126 }
127
128 // Condition conversion
129 static Assembler::Condition j_not(TemplateTable::Condition cc) {
130 switch (cc) {
131 case TemplateTable::equal : return Assembler::notEqual;
132 case TemplateTable::not_equal : return Assembler::equal;
133 case TemplateTable::less : return Assembler::greaterEqual;
134 case TemplateTable::less_equal : return Assembler::greater;
135 case TemplateTable::greater : return Assembler::lessEqual;
136 case TemplateTable::greater_equal: return Assembler::less;
137 }
138 ShouldNotReachHere();
139 return Assembler::zero;
140 }
141
142
143
144 // Miscelaneous helper routines
145 // Store an oop (or NULL) at the address described by obj.
146 // If val == noreg this means store a NULL
147
148
149 static void do_oop_store(InterpreterMacroAssembler* _masm,
150 Address obj,
151 Register val,
152 BarrierSet::Name barrier,
153 bool precise) {
154 assert(val == noreg || val == rax, "parameter is just for looks");
155 switch (barrier) {
156 #if INCLUDE_ALL_GCS
157 case BarrierSet::G1SATBCTLogging:
158 {
159 // flatten object address if needed
160 // We do it regardless of precise because we need the registers
161 if (obj.index() == noreg && obj.disp() == 0) {
162 if (obj.base() != rdx) {
163 __ movptr(rdx, obj.base());
164 }
165 } else {
166 __ lea(rdx, obj);
167 }
168
169 Register rtmp = LP64_ONLY(r8) NOT_LP64(rsi);
170 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
171
172 NOT_LP64(__ get_thread(rcx));
173 NOT_LP64(__ save_bcp());
174
175 __ g1_write_barrier_pre(rdx /* obj */,
176 rbx /* pre_val */,
177 rthread /* thread */,
178 rtmp /* tmp */,
179 val != noreg /* tosca_live */,
180 false /* expand_call */);
181 if (val == noreg) {
182 __ store_heap_oop_null(Address(rdx, 0));
183 } else {
184 // G1 barrier needs uncompressed oop for region cross check.
185 Register new_val = val;
186 if (UseCompressedOops) {
187 new_val = rbx;
188 __ movptr(new_val, val);
189 }
190 __ store_heap_oop(Address(rdx, 0), val);
191 __ g1_write_barrier_post(rdx /* store_adr */,
192 new_val /* new_val */,
193 rthread /* thread */,
194 rtmp /* tmp */,
195 rbx /* tmp2 */);
196 }
197 NOT_LP64( __ restore_bcp());
198 }
199 break;
200 #endif // INCLUDE_ALL_GCS
201 case BarrierSet::CardTableForRS:
202 case BarrierSet::CardTableExtension:
203 {
204 if (val == noreg) {
205 __ store_heap_oop_null(obj);
206 } else {
207 __ store_heap_oop(obj, val);
208 // flatten object address if needed
209 if (!precise || (obj.index() == noreg && obj.disp() == 0)) {
210 __ store_check(obj.base());
211 } else {
212 __ lea(rdx, obj);
213 __ store_check(rdx);
214 }
215 }
216 }
217 break;
218 case BarrierSet::ModRef:
219 if (val == noreg) {
220 __ store_heap_oop_null(obj);
221 } else {
222 __ store_heap_oop(obj, val);
223 }
224 break;
225 default :
226 ShouldNotReachHere();
227
228 }
229 }
230
231 Address TemplateTable::at_bcp(int offset) {
232 assert(_desc->uses_bcp(), "inconsistent uses_bcp information");
233 return Address(rbcp, offset);
234 }
235
236
237 void TemplateTable::patch_bytecode(Bytecodes::Code bc, Register bc_reg,
238 Register temp_reg, bool load_bc_into_bc_reg/*=true*/,
239 int byte_no) {
240 if (!RewriteBytecodes) return;
241 Label L_patch_done;
242
243 switch (bc) {
244 case Bytecodes::_fast_qputfield:
245 __ jmp(L_patch_done); // don't patch yet
246 break;
247 case Bytecodes::_fast_aputfield:
248 case Bytecodes::_fast_bputfield:
249 case Bytecodes::_fast_zputfield:
250 case Bytecodes::_fast_cputfield:
251 case Bytecodes::_fast_dputfield:
252 case Bytecodes::_fast_fputfield:
253 case Bytecodes::_fast_iputfield:
254 case Bytecodes::_fast_lputfield:
255 case Bytecodes::_fast_sputfield:
256 {
257 // We skip bytecode quickening for putfield instructions when
258 // the put_code written to the constant pool cache is zero.
259 // This is required so that every execution of this instruction
260 // calls out to InterpreterRuntime::resolve_get_put to do
261 // additional, required work.
262 assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range");
263 assert(load_bc_into_bc_reg, "we use bc_reg as temp");
264 __ get_cache_and_index_and_bytecode_at_bcp(temp_reg, bc_reg, temp_reg, byte_no, 1);
265 __ movl(bc_reg, bc);
266 __ cmpl(temp_reg, (int) 0);
267 __ jcc(Assembler::zero, L_patch_done); // don't patch
268 }
269 break;
270 default:
271 assert(byte_no == -1, "sanity");
272 // the pair bytecodes have already done the load.
273 if (load_bc_into_bc_reg) {
274 __ movl(bc_reg, bc);
275 }
276 }
277
278 if (JvmtiExport::can_post_breakpoint()) {
279 Label L_fast_patch;
280 // if a breakpoint is present we can't rewrite the stream directly
281 __ movzbl(temp_reg, at_bcp(0));
282 __ cmpl(temp_reg, Bytecodes::_breakpoint);
283 __ jcc(Assembler::notEqual, L_fast_patch);
284 __ get_method(temp_reg);
285 // Let breakpoint table handling rewrite to quicker bytecode
286 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::set_original_bytecode_at), temp_reg, rbcp, bc_reg);
287 #ifndef ASSERT
288 __ jmpb(L_patch_done);
289 #else
290 __ jmp(L_patch_done);
291 #endif
292 __ bind(L_fast_patch);
293 }
294
295 #ifdef ASSERT
296 Label L_okay;
297 __ load_unsigned_byte(temp_reg, at_bcp(0));
298 __ cmpl(temp_reg, (int) Bytecodes::java_code(bc));
299 __ jcc(Assembler::equal, L_okay);
300 __ cmpl(temp_reg, bc_reg);
301 __ jcc(Assembler::equal, L_okay);
302 __ stop("patching the wrong bytecode");
303 __ bind(L_okay);
304 #endif
305
306 // patch bytecode
307 __ movb(at_bcp(0), bc_reg);
308 __ bind(L_patch_done);
309 }
310 // Individual instructions
311
312
313 void TemplateTable::nop() {
314 transition(vtos, vtos);
315 // nothing to do
316 }
317
318 void TemplateTable::shouldnotreachhere() {
319 transition(vtos, vtos);
320 __ stop("shouldnotreachhere bytecode");
321 }
322
323 void TemplateTable::aconst_null() {
324 transition(vtos, atos);
325 __ xorl(rax, rax);
326 }
327
328 void TemplateTable::iconst(int value) {
329 transition(vtos, itos);
330 if (value == 0) {
331 __ xorl(rax, rax);
332 } else {
333 __ movl(rax, value);
334 }
335 }
336
337 void TemplateTable::lconst(int value) {
338 transition(vtos, ltos);
339 if (value == 0) {
340 __ xorl(rax, rax);
341 } else {
342 __ movl(rax, value);
343 }
344 #ifndef _LP64
345 assert(value >= 0, "check this code");
346 __ xorptr(rdx, rdx);
347 #endif
348 }
349
350
351
352 void TemplateTable::fconst(int value) {
353 transition(vtos, ftos);
354 if (UseSSE >= 1) {
355 static float one = 1.0f, two = 2.0f;
356 switch (value) {
357 case 0:
358 __ xorps(xmm0, xmm0);
359 break;
360 case 1:
361 __ movflt(xmm0, ExternalAddress((address) &one));
362 break;
363 case 2:
364 __ movflt(xmm0, ExternalAddress((address) &two));
365 break;
366 default:
367 ShouldNotReachHere();
368 break;
369 }
370 } else {
371 #ifdef _LP64
372 ShouldNotReachHere();
373 #else
374 if (value == 0) { __ fldz();
375 } else if (value == 1) { __ fld1();
376 } else if (value == 2) { __ fld1(); __ fld1(); __ faddp(); // should do a better solution here
377 } else { ShouldNotReachHere();
378 }
379 #endif // _LP64
380 }
381 }
382
383 void TemplateTable::dconst(int value) {
384 transition(vtos, dtos);
385 if (UseSSE >= 2) {
386 static double one = 1.0;
387 switch (value) {
388 case 0:
389 __ xorpd(xmm0, xmm0);
390 break;
391 case 1:
392 __ movdbl(xmm0, ExternalAddress((address) &one));
393 break;
394 default:
395 ShouldNotReachHere();
396 break;
397 }
398 } else {
399 #ifdef _LP64
400 ShouldNotReachHere();
401 #else
402 if (value == 0) { __ fldz();
403 } else if (value == 1) { __ fld1();
404 } else { ShouldNotReachHere();
405 }
406 #endif
407 }
408 }
409
410 void TemplateTable::bipush() {
411 transition(vtos, itos);
412 __ load_signed_byte(rax, at_bcp(1));
413 }
414
415 void TemplateTable::sipush() {
416 transition(vtos, itos);
417 __ load_unsigned_short(rax, at_bcp(1));
418 __ bswapl(rax);
419 __ sarl(rax, 16);
420 }
421
422 void TemplateTable::ldc(bool wide) {
423 transition(vtos, vtos);
424 Register rarg = NOT_LP64(rcx) LP64_ONLY(c_rarg1);
425 Label call_ldc, notFloat, notClass, Done;
426
427 if (wide) {
428 __ get_unsigned_2_byte_index_at_bcp(rbx, 1);
429 } else {
430 __ load_unsigned_byte(rbx, at_bcp(1));
431 }
432
433 __ get_cpool_and_tags(rcx, rax);
434 const int base_offset = ConstantPool::header_size() * wordSize;
435 const int tags_offset = Array<u1>::base_offset_in_bytes();
436
437 // get type
438 __ movzbl(rdx, Address(rax, rbx, Address::times_1, tags_offset));
439
440 // unresolved class - get the resolved class
441 __ cmpl(rdx, JVM_CONSTANT_UnresolvedClass);
442 __ jccb(Assembler::equal, call_ldc);
443
444 // unresolved class in error state - call into runtime to throw the error
445 // from the first resolution attempt
446 __ cmpl(rdx, JVM_CONSTANT_UnresolvedClassInError);
447 __ jccb(Assembler::equal, call_ldc);
448
449 // resolved class - need to call vm to get java mirror of the class
450 __ cmpl(rdx, JVM_CONSTANT_Class);
451 __ jcc(Assembler::equal, call_ldc);
452
453 // unresolved value type - get the resolved class
454 __ cmpl(rdx, JVM_CONSTANT_UnresolvedValue);
455 __ jccb(Assembler::equal, call_ldc);
456
457 // unresolved value type in error state - call into runtime to throw the error
458 // from the first resolution attempt
459 __ cmpl(rdx, JVM_CONSTANT_UnresolvedValueInError);
460 __ jccb(Assembler::equal, call_ldc);
461
462 // resolved value type - need to call vm to get java mirror
463 __ cmpl(rdx, JVM_CONSTANT_Value);
464 __ jcc(Assembler::notEqual, notClass);
465
466 __ bind(call_ldc);
467
468 __ movl(rarg, wide);
469 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::ldc), rarg);
470
471 __ push(atos);
472 __ jmp(Done);
473
474 __ bind(notClass);
475 __ cmpl(rdx, JVM_CONSTANT_Float);
476 __ jccb(Assembler::notEqual, notFloat);
477
478 // ftos
479 __ load_float(Address(rcx, rbx, Address::times_ptr, base_offset));
480 __ push(ftos);
481 __ jmp(Done);
482
483 __ bind(notFloat);
484 #ifdef ASSERT
485 {
486 Label L;
487 __ cmpl(rdx, JVM_CONSTANT_Integer);
488 __ jcc(Assembler::equal, L);
489 // String and Object are rewritten to fast_aldc
490 __ stop("unexpected tag type in ldc");
491 __ bind(L);
492 }
493 #endif
494 // itos JVM_CONSTANT_Integer only
495 __ movl(rax, Address(rcx, rbx, Address::times_ptr, base_offset));
496 __ push(itos);
497 __ bind(Done);
498 }
499
500 // Fast path for caching oop constants.
501 void TemplateTable::fast_aldc(bool wide) {
502 transition(vtos, atos);
503
504 Register result = rax;
505 Register tmp = rdx;
506 int index_size = wide ? sizeof(u2) : sizeof(u1);
507
508 Label resolved;
509
510 // We are resolved if the resolved reference cache entry contains a
511 // non-null object (String, MethodType, etc.)
512 assert_different_registers(result, tmp);
513 __ get_cache_index_at_bcp(tmp, 1, index_size);
514 __ load_resolved_reference_at_index(result, tmp);
515 __ testl(result, result);
516 __ jcc(Assembler::notZero, resolved);
517
518 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc);
519
520 // first time invocation - must resolve first
521 __ movl(tmp, (int)bytecode());
522 __ call_VM(result, entry, tmp);
523
524 __ bind(resolved);
525
526 if (VerifyOops) {
527 __ verify_oop(result);
528 }
529 }
530
531 void TemplateTable::ldc2_w() {
532 transition(vtos, vtos);
533 Label Long, Done;
534 __ get_unsigned_2_byte_index_at_bcp(rbx, 1);
535
536 __ get_cpool_and_tags(rcx, rax);
537 const int base_offset = ConstantPool::header_size() * wordSize;
538 const int tags_offset = Array<u1>::base_offset_in_bytes();
539
540 // get type
541 __ cmpb(Address(rax, rbx, Address::times_1, tags_offset),
542 JVM_CONSTANT_Double);
543 __ jccb(Assembler::notEqual, Long);
544
545 // dtos
546 __ load_double(Address(rcx, rbx, Address::times_ptr, base_offset));
547 __ push(dtos);
548
549 __ jmpb(Done);
550 __ bind(Long);
551
552 // ltos
553 __ movptr(rax, Address(rcx, rbx, Address::times_ptr, base_offset + 0 * wordSize));
554 NOT_LP64(__ movptr(rdx, Address(rcx, rbx, Address::times_ptr, base_offset + 1 * wordSize)));
555 __ push(ltos);
556
557 __ bind(Done);
558 }
559
560 void TemplateTable::locals_index(Register reg, int offset) {
561 __ load_unsigned_byte(reg, at_bcp(offset));
562 __ negptr(reg);
563 }
564
565 void TemplateTable::iload() {
566 iload_internal();
567 }
568
569 void TemplateTable::nofast_iload() {
570 iload_internal(may_not_rewrite);
571 }
572
573 void TemplateTable::iload_internal(RewriteControl rc) {
574 transition(vtos, itos);
575 if (RewriteFrequentPairs && rc == may_rewrite) {
576 Label rewrite, done;
577 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
578 LP64_ONLY(assert(rbx != bc, "register damaged"));
579
580 // get next byte
581 __ load_unsigned_byte(rbx,
582 at_bcp(Bytecodes::length_for(Bytecodes::_iload)));
583 // if _iload, wait to rewrite to iload2. We only want to rewrite the
584 // last two iloads in a pair. Comparing against fast_iload means that
585 // the next bytecode is neither an iload or a caload, and therefore
586 // an iload pair.
587 __ cmpl(rbx, Bytecodes::_iload);
588 __ jcc(Assembler::equal, done);
589
590 __ cmpl(rbx, Bytecodes::_fast_iload);
591 __ movl(bc, Bytecodes::_fast_iload2);
592
593 __ jccb(Assembler::equal, rewrite);
594
595 // if _caload, rewrite to fast_icaload
596 __ cmpl(rbx, Bytecodes::_caload);
597 __ movl(bc, Bytecodes::_fast_icaload);
598 __ jccb(Assembler::equal, rewrite);
599
600 // rewrite so iload doesn't check again.
601 __ movl(bc, Bytecodes::_fast_iload);
602
603 // rewrite
604 // bc: fast bytecode
605 __ bind(rewrite);
606 patch_bytecode(Bytecodes::_iload, bc, rbx, false);
607 __ bind(done);
608 }
609
610 // Get the local value into tos
611 locals_index(rbx);
612 __ movl(rax, iaddress(rbx));
613 }
614
615 void TemplateTable::fast_iload2() {
616 transition(vtos, itos);
617 locals_index(rbx);
618 __ movl(rax, iaddress(rbx));
619 __ push(itos);
620 locals_index(rbx, 3);
621 __ movl(rax, iaddress(rbx));
622 }
623
624 void TemplateTable::fast_iload() {
625 transition(vtos, itos);
626 locals_index(rbx);
627 __ movl(rax, iaddress(rbx));
628 }
629
630 void TemplateTable::lload() {
631 transition(vtos, ltos);
632 locals_index(rbx);
633 __ movptr(rax, laddress(rbx));
634 NOT_LP64(__ movl(rdx, haddress(rbx)));
635 }
636
637 void TemplateTable::fload() {
638 transition(vtos, ftos);
639 locals_index(rbx);
640 __ load_float(faddress(rbx));
641 }
642
643 void TemplateTable::dload() {
644 transition(vtos, dtos);
645 locals_index(rbx);
646 __ load_double(daddress(rbx));
647 }
648
649 void TemplateTable::aload() {
650 transition(vtos, atos);
651 locals_index(rbx);
652 __ movptr(rax, aaddress(rbx));
653 }
654
655 void TemplateTable::vload() {
656 transition(vtos, qtos);
657 locals_index(rbx);
658 __ movptr(rax, aaddress(rbx));
659 }
660
661 void TemplateTable::locals_index_wide(Register reg) {
662 __ load_unsigned_short(reg, at_bcp(2));
663 __ bswapl(reg);
664 __ shrl(reg, 16);
665 __ negptr(reg);
666 }
667
668 void TemplateTable::wide_iload() {
669 transition(vtos, itos);
670 locals_index_wide(rbx);
671 __ movl(rax, iaddress(rbx));
672 }
673
674 void TemplateTable::wide_lload() {
675 transition(vtos, ltos);
676 locals_index_wide(rbx);
677 __ movptr(rax, laddress(rbx));
678 NOT_LP64(__ movl(rdx, haddress(rbx)));
679 }
680
681 void TemplateTable::wide_fload() {
682 transition(vtos, ftos);
683 locals_index_wide(rbx);
684 __ load_float(faddress(rbx));
685 }
686
687 void TemplateTable::wide_dload() {
688 transition(vtos, dtos);
689 locals_index_wide(rbx);
690 __ load_double(daddress(rbx));
691 }
692
693 void TemplateTable::wide_aload() {
694 transition(vtos, atos);
695 locals_index_wide(rbx);
696 __ movptr(rax, aaddress(rbx));
697 }
698
699 void TemplateTable::wide_vload() {
700 transition(vtos, qtos);
701 locals_index_wide(rbx);
702 __ movptr(rax, aaddress(rbx));
703 }
704
705 void TemplateTable::index_check(Register array, Register index) {
706 // Pop ptr into array
707 __ pop_ptr(array);
708 index_check_without_pop(array, index);
709 }
710
711 void TemplateTable::index_check_without_pop(Register array, Register index) {
712 // destroys rbx
713 // check array
714 __ null_check(array, arrayOopDesc::length_offset_in_bytes());
715 // sign extend index for use by indexed load
716 __ movl2ptr(index, index);
717 // check index
718 __ cmpl(index, Address(array, arrayOopDesc::length_offset_in_bytes()));
719 if (index != rbx) {
720 // ??? convention: move aberrant index into rbx for exception message
721 assert(rbx != array, "different registers");
722 __ movl(rbx, index);
723 }
724 __ jump_cc(Assembler::aboveEqual,
725 ExternalAddress(Interpreter::_throw_ArrayIndexOutOfBoundsException_entry));
726 }
727
728
729 void TemplateTable::iaload() {
730 transition(itos, itos);
731 // rax: index
732 // rdx: array
733 index_check(rdx, rax); // kills rbx
734 __ movl(rax, Address(rdx, rax,
735 Address::times_4,
736 arrayOopDesc::base_offset_in_bytes(T_INT)));
737 }
738
739 void TemplateTable::laload() {
740 transition(itos, ltos);
741 // rax: index
742 // rdx: array
743 index_check(rdx, rax); // kills rbx
744 NOT_LP64(__ mov(rbx, rax));
745 // rbx,: index
746 __ movptr(rax, Address(rdx, rbx, Address::times_8, arrayOopDesc::base_offset_in_bytes(T_LONG) + 0 * wordSize));
747 NOT_LP64(__ movl(rdx, Address(rdx, rbx, Address::times_8, arrayOopDesc::base_offset_in_bytes(T_LONG) + 1 * wordSize)));
748 }
749
750
751
752 void TemplateTable::faload() {
753 transition(itos, ftos);
754 // rax: index
755 // rdx: array
756 index_check(rdx, rax); // kills rbx
757 __ load_float(Address(rdx, rax,
758 Address::times_4,
759 arrayOopDesc::base_offset_in_bytes(T_FLOAT)));
760 }
761
762 void TemplateTable::daload() {
763 transition(itos, dtos);
764 // rax: index
765 // rdx: array
766 index_check(rdx, rax); // kills rbx
767 __ load_double(Address(rdx, rax,
768 Address::times_8,
769 arrayOopDesc::base_offset_in_bytes(T_DOUBLE)));
770 }
771
772 void TemplateTable::aaload() {
773 transition(itos, atos);
774 // rax: index
775 // rdx: array
776 index_check(rdx, rax); // kills rbx
777 __ load_heap_oop(rax, Address(rdx, rax,
778 UseCompressedOops ? Address::times_4 : Address::times_ptr,
779 arrayOopDesc::base_offset_in_bytes(T_OBJECT)));
780 }
781
782 void TemplateTable::vaload() {
783 transition(itos, qtos);
784
785 Register array = rcx;
786 Register index = rax;
787
788 index_check(array, index); // kills rbx, pops array
789
790 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::value_array_load) , array, index);
791 }
792
793 void TemplateTable::baload() {
794 transition(itos, itos);
795 // rax: index
796 // rdx: array
797 index_check(rdx, rax); // kills rbx
798 __ load_signed_byte(rax, Address(rdx, rax, Address::times_1, arrayOopDesc::base_offset_in_bytes(T_BYTE)));
799 }
800
801 void TemplateTable::caload() {
802 transition(itos, itos);
803 // rax: index
804 // rdx: array
805 index_check(rdx, rax); // kills rbx
806 __ load_unsigned_short(rax, Address(rdx, rax, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR)));
807 }
808
809 // iload followed by caload frequent pair
810 void TemplateTable::fast_icaload() {
811 transition(vtos, itos);
812 // load index out of locals
813 locals_index(rbx);
814 __ movl(rax, iaddress(rbx));
815
816 // rax: index
817 // rdx: array
818 index_check(rdx, rax); // kills rbx
819 __ load_unsigned_short(rax,
820 Address(rdx, rax,
821 Address::times_2,
822 arrayOopDesc::base_offset_in_bytes(T_CHAR)));
823 }
824
825
826 void TemplateTable::saload() {
827 transition(itos, itos);
828 // rax: index
829 // rdx: array
830 index_check(rdx, rax); // kills rbx
831 __ load_signed_short(rax, Address(rdx, rax, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_SHORT)));
832 }
833
834 void TemplateTable::iload(int n) {
835 transition(vtos, itos);
836 __ movl(rax, iaddress(n));
837 }
838
839 void TemplateTable::lload(int n) {
840 transition(vtos, ltos);
841 __ movptr(rax, laddress(n));
842 NOT_LP64(__ movptr(rdx, haddress(n)));
843 }
844
845 void TemplateTable::fload(int n) {
846 transition(vtos, ftos);
847 __ load_float(faddress(n));
848 }
849
850 void TemplateTable::dload(int n) {
851 transition(vtos, dtos);
852 __ load_double(daddress(n));
853 }
854
855 void TemplateTable::aload(int n) {
856 transition(vtos, atos);
857 __ movptr(rax, aaddress(n));
858 }
859
860 void TemplateTable::aload_0() {
861 aload_0_internal();
862 }
863
864 void TemplateTable::nofast_aload_0() {
865 aload_0_internal(may_not_rewrite);
866 }
867
868 void TemplateTable::aload_0_internal(RewriteControl rc) {
869 transition(vtos, atos);
870 // According to bytecode histograms, the pairs:
871 //
872 // _aload_0, _fast_igetfield
873 // _aload_0, _fast_agetfield
874 // _aload_0, _fast_fgetfield
875 //
876 // occur frequently. If RewriteFrequentPairs is set, the (slow)
877 // _aload_0 bytecode checks if the next bytecode is either
878 // _fast_igetfield, _fast_agetfield or _fast_fgetfield and then
879 // rewrites the current bytecode into a pair bytecode; otherwise it
880 // rewrites the current bytecode into _fast_aload_0 that doesn't do
881 // the pair check anymore.
882 //
883 // Note: If the next bytecode is _getfield, the rewrite must be
884 // delayed, otherwise we may miss an opportunity for a pair.
885 //
886 // Also rewrite frequent pairs
887 // aload_0, aload_1
888 // aload_0, iload_1
889 // These bytecodes with a small amount of code are most profitable
890 // to rewrite
891 if (RewriteFrequentPairs && rc == may_rewrite) {
892 Label rewrite, done;
893
894 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
895 LP64_ONLY(assert(rbx != bc, "register damaged"));
896
897 // get next byte
898 __ load_unsigned_byte(rbx, at_bcp(Bytecodes::length_for(Bytecodes::_aload_0)));
899
900 // if _getfield then wait with rewrite
901 __ cmpl(rbx, Bytecodes::_getfield);
902 __ jcc(Assembler::equal, done);
903
904 // if _igetfield then rewrite to _fast_iaccess_0
905 assert(Bytecodes::java_code(Bytecodes::_fast_iaccess_0) == Bytecodes::_aload_0, "fix bytecode definition");
906 __ cmpl(rbx, Bytecodes::_fast_igetfield);
907 __ movl(bc, Bytecodes::_fast_iaccess_0);
908 __ jccb(Assembler::equal, rewrite);
909
910 // if _agetfield then rewrite to _fast_aaccess_0
911 assert(Bytecodes::java_code(Bytecodes::_fast_aaccess_0) == Bytecodes::_aload_0, "fix bytecode definition");
912 __ cmpl(rbx, Bytecodes::_fast_agetfield);
913 __ movl(bc, Bytecodes::_fast_aaccess_0);
914 __ jccb(Assembler::equal, rewrite);
915
916 // if _fgetfield then rewrite to _fast_faccess_0
917 assert(Bytecodes::java_code(Bytecodes::_fast_faccess_0) == Bytecodes::_aload_0, "fix bytecode definition");
918 __ cmpl(rbx, Bytecodes::_fast_fgetfield);
919 __ movl(bc, Bytecodes::_fast_faccess_0);
920 __ jccb(Assembler::equal, rewrite);
921
922 // else rewrite to _fast_aload0
923 assert(Bytecodes::java_code(Bytecodes::_fast_aload_0) == Bytecodes::_aload_0, "fix bytecode definition");
924 __ movl(bc, Bytecodes::_fast_aload_0);
925
926 // rewrite
927 // bc: fast bytecode
928 __ bind(rewrite);
929 patch_bytecode(Bytecodes::_aload_0, bc, rbx, false);
930
931 __ bind(done);
932 }
933
934 // Do actual aload_0 (must do this after patch_bytecode which might call VM and GC might change oop).
935 aload(0);
936 }
937
938 void TemplateTable::istore() {
939 transition(itos, vtos);
940 locals_index(rbx);
941 __ movl(iaddress(rbx), rax);
942 }
943
944
945 void TemplateTable::lstore() {
946 transition(ltos, vtos);
947 locals_index(rbx);
948 __ movptr(laddress(rbx), rax);
949 NOT_LP64(__ movptr(haddress(rbx), rdx));
950 }
951
952 void TemplateTable::fstore() {
953 transition(ftos, vtos);
954 locals_index(rbx);
955 __ store_float(faddress(rbx));
956 }
957
958 void TemplateTable::dstore() {
959 transition(dtos, vtos);
960 locals_index(rbx);
961 __ store_double(daddress(rbx));
962 }
963
964 void TemplateTable::astore() {
965 transition(vtos, vtos);
966 __ pop_ptr(rax);
967 locals_index(rbx);
968 __ movptr(aaddress(rbx), rax);
969 }
970
971 void TemplateTable::vstore() {
972 transition(vtos, vtos);
973 __ pop_ptr(rax);
974 locals_index(rbx);
975 __ movptr(aaddress(rbx), rax);
976 }
977
978 void TemplateTable::wide_istore() {
979 transition(vtos, vtos);
980 __ pop_i();
981 locals_index_wide(rbx);
982 __ movl(iaddress(rbx), rax);
983 }
984
985 void TemplateTable::wide_lstore() {
986 transition(vtos, vtos);
987 NOT_LP64(__ pop_l(rax, rdx));
988 LP64_ONLY(__ pop_l());
989 locals_index_wide(rbx);
990 __ movptr(laddress(rbx), rax);
991 NOT_LP64(__ movl(haddress(rbx), rdx));
992 }
993
994 void TemplateTable::wide_fstore() {
995 #ifdef _LP64
996 transition(vtos, vtos);
997 __ pop_f(xmm0);
998 locals_index_wide(rbx);
999 __ movflt(faddress(rbx), xmm0);
1000 #else
1001 wide_istore();
1002 #endif
1003 }
1004
1005 void TemplateTable::wide_dstore() {
1006 #ifdef _LP64
1007 transition(vtos, vtos);
1008 __ pop_d(xmm0);
1009 locals_index_wide(rbx);
1010 __ movdbl(daddress(rbx), xmm0);
1011 #else
1012 wide_lstore();
1013 #endif
1014 }
1015
1016 void TemplateTable::wide_astore() {
1017 transition(vtos, vtos);
1018 __ pop_ptr(rax);
1019 locals_index_wide(rbx);
1020 __ movptr(aaddress(rbx), rax);
1021 }
1022
1023 void TemplateTable::wide_vstore() {
1024 transition(vtos, vtos);
1025 __ pop_ptr(rax);
1026 locals_index_wide(rbx);
1027 __ movptr(aaddress(rbx), rax);
1028 }
1029
1030 void TemplateTable::iastore() {
1031 transition(itos, vtos);
1032 __ pop_i(rbx);
1033 // rax: value
1034 // rbx: index
1035 // rdx: array
1036 index_check(rdx, rbx); // prefer index in rbx
1037 __ movl(Address(rdx, rbx,
1038 Address::times_4,
1039 arrayOopDesc::base_offset_in_bytes(T_INT)),
1040 rax);
1041 }
1042
1043 void TemplateTable::lastore() {
1044 transition(ltos, vtos);
1045 __ pop_i(rbx);
1046 // rax,: low(value)
1047 // rcx: array
1048 // rdx: high(value)
1049 index_check(rcx, rbx); // prefer index in rbx,
1050 // rbx,: index
1051 __ movptr(Address(rcx, rbx, Address::times_8, arrayOopDesc::base_offset_in_bytes(T_LONG) + 0 * wordSize), rax);
1052 NOT_LP64(__ movl(Address(rcx, rbx, Address::times_8, arrayOopDesc::base_offset_in_bytes(T_LONG) + 1 * wordSize), rdx));
1053 }
1054
1055
1056 void TemplateTable::fastore() {
1057 transition(ftos, vtos);
1058 __ pop_i(rbx);
1059 // value is in UseSSE >= 1 ? xmm0 : ST(0)
1060 // rbx: index
1061 // rdx: array
1062 index_check(rdx, rbx); // prefer index in rbx
1063 __ store_float(Address(rdx, rbx, Address::times_4, arrayOopDesc::base_offset_in_bytes(T_FLOAT)));
1064 }
1065
1066 void TemplateTable::dastore() {
1067 transition(dtos, vtos);
1068 __ pop_i(rbx);
1069 // value is in UseSSE >= 2 ? xmm0 : ST(0)
1070 // rbx: index
1071 // rdx: array
1072 index_check(rdx, rbx); // prefer index in rbx
1073 __ store_double(Address(rdx, rbx, Address::times_8, arrayOopDesc::base_offset_in_bytes(T_DOUBLE)));
1074 }
1075
1076 void TemplateTable::aastore() {
1077 Label is_null, ok_is_subtype, done;
1078 transition(vtos, vtos);
1079 // stack: ..., array, index, value
1080 __ movptr(rax, at_tos()); // value
1081 __ movl(rcx, at_tos_p1()); // index
1082 __ movptr(rdx, at_tos_p2()); // array
1083
1084 Address element_address(rdx, rcx,
1085 UseCompressedOops? Address::times_4 : Address::times_ptr,
1086 arrayOopDesc::base_offset_in_bytes(T_OBJECT));
1087
1088 index_check_without_pop(rdx, rcx); // kills rbx
1089 __ testptr(rax, rax);
1090 __ jcc(Assembler::zero, is_null);
1091
1092 // Move subklass into rbx
1093 __ load_klass(rbx, rax);
1094 // Move superklass into rax
1095 __ load_klass(rax, rdx);
1096 __ movptr(rax, Address(rax,
1097 ObjArrayKlass::element_klass_offset()));
1098 // Compress array + index*oopSize + 12 into a single register. Frees rcx.
1099 __ lea(rdx, element_address);
1100
1101 // Generate subtype check. Blows rcx, rdi
1102 // Superklass in rax. Subklass in rbx.
1103 __ gen_subtype_check(rbx, ok_is_subtype);
1104
1105 // Come here on failure
1106 // object is at TOS
1107 __ jump(ExternalAddress(Interpreter::_throw_ArrayStoreException_entry));
1108
1109 // Come here on success
1110 __ bind(ok_is_subtype);
1111
1112 // Get the value we will store
1113 __ movptr(rax, at_tos());
1114 // Now store using the appropriate barrier
1115 do_oop_store(_masm, Address(rdx, 0), rax, _bs->kind(), true);
1116 __ jmp(done);
1117
1118 // Have a NULL in rax, rdx=array, ecx=index. Store NULL at ary[idx]
1119 __ bind(is_null);
1120 __ profile_null_seen(rbx);
1121
1122 // Store a NULL
1123 do_oop_store(_masm, element_address, noreg, _bs->kind(), true);
1124
1125 // Pop stack arguments
1126 __ bind(done);
1127 __ addptr(rsp, 3 * Interpreter::stackElementSize);
1128 }
1129
1130 void TemplateTable::vastore() {
1131 transition(vtos, vtos);
1132
1133 Register value = rcx;
1134 Register index = rbx;
1135 Register array = rax;
1136
1137 // stack: ..., array, index, value
1138 __ pop_ptr(value);
1139 __ pop_i(index);
1140 __ pop_ptr(array);
1141
1142 index_check_without_pop(array, index);
1143
1144 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::value_array_store), array, index, value);
1145 }
1146
1147 void TemplateTable::bastore() {
1148 transition(itos, vtos);
1149 __ pop_i(rbx);
1150 // rax: value
1151 // rbx: index
1152 // rdx: array
1153 index_check(rdx, rbx); // prefer index in rbx
1154 // Need to check whether array is boolean or byte
1155 // since both types share the bastore bytecode.
1156 __ load_klass(rcx, rdx);
1157 __ movl(rcx, Address(rcx, Klass::layout_helper_offset()));
1158 int diffbit = Klass::layout_helper_boolean_diffbit();
1159 __ testl(rcx, diffbit);
1160 Label L_skip;
1161 __ jccb(Assembler::zero, L_skip);
1162 __ andl(rax, 1); // if it is a T_BOOLEAN array, mask the stored value to 0/1
1163 __ bind(L_skip);
1164 __ movb(Address(rdx, rbx,
1165 Address::times_1,
1166 arrayOopDesc::base_offset_in_bytes(T_BYTE)),
1167 rax);
1168 }
1169
1170 void TemplateTable::castore() {
1171 transition(itos, vtos);
1172 __ pop_i(rbx);
1173 // rax: value
1174 // rbx: index
1175 // rdx: array
1176 index_check(rdx, rbx); // prefer index in rbx
1177 __ movw(Address(rdx, rbx,
1178 Address::times_2,
1179 arrayOopDesc::base_offset_in_bytes(T_CHAR)),
1180 rax);
1181 }
1182
1183
1184 void TemplateTable::sastore() {
1185 castore();
1186 }
1187
1188 void TemplateTable::istore(int n) {
1189 transition(itos, vtos);
1190 __ movl(iaddress(n), rax);
1191 }
1192
1193 void TemplateTable::lstore(int n) {
1194 transition(ltos, vtos);
1195 __ movptr(laddress(n), rax);
1196 NOT_LP64(__ movptr(haddress(n), rdx));
1197 }
1198
1199 void TemplateTable::fstore(int n) {
1200 transition(ftos, vtos);
1201 __ store_float(faddress(n));
1202 }
1203
1204 void TemplateTable::dstore(int n) {
1205 transition(dtos, vtos);
1206 __ store_double(daddress(n));
1207 }
1208
1209
1210 void TemplateTable::astore(int n) {
1211 transition(vtos, vtos);
1212 __ pop_ptr(rax);
1213 __ movptr(aaddress(n), rax);
1214 }
1215
1216 void TemplateTable::pop() {
1217 transition(vtos, vtos);
1218 __ addptr(rsp, Interpreter::stackElementSize);
1219 }
1220
1221 void TemplateTable::pop2() {
1222 transition(vtos, vtos);
1223 __ addptr(rsp, 2 * Interpreter::stackElementSize);
1224 }
1225
1226
1227 void TemplateTable::dup() {
1228 transition(vtos, vtos);
1229 __ load_ptr(0, rax);
1230 __ push_ptr(rax);
1231 // stack: ..., a, a
1232 }
1233
1234 void TemplateTable::dup_x1() {
1235 transition(vtos, vtos);
1236 // stack: ..., a, b
1237 __ load_ptr( 0, rax); // load b
1238 __ load_ptr( 1, rcx); // load a
1239 __ store_ptr(1, rax); // store b
1240 __ store_ptr(0, rcx); // store a
1241 __ push_ptr(rax); // push b
1242 // stack: ..., b, a, b
1243 }
1244
1245 void TemplateTable::dup_x2() {
1246 transition(vtos, vtos);
1247 // stack: ..., a, b, c
1248 __ load_ptr( 0, rax); // load c
1249 __ load_ptr( 2, rcx); // load a
1250 __ store_ptr(2, rax); // store c in a
1251 __ push_ptr(rax); // push c
1252 // stack: ..., c, b, c, c
1253 __ load_ptr( 2, rax); // load b
1254 __ store_ptr(2, rcx); // store a in b
1255 // stack: ..., c, a, c, c
1256 __ store_ptr(1, rax); // store b in c
1257 // stack: ..., c, a, b, c
1258 }
1259
1260 void TemplateTable::dup2() {
1261 transition(vtos, vtos);
1262 // stack: ..., a, b
1263 __ load_ptr(1, rax); // load a
1264 __ push_ptr(rax); // push a
1265 __ load_ptr(1, rax); // load b
1266 __ push_ptr(rax); // push b
1267 // stack: ..., a, b, a, b
1268 }
1269
1270
1271 void TemplateTable::dup2_x1() {
1272 transition(vtos, vtos);
1273 // stack: ..., a, b, c
1274 __ load_ptr( 0, rcx); // load c
1275 __ load_ptr( 1, rax); // load b
1276 __ push_ptr(rax); // push b
1277 __ push_ptr(rcx); // push c
1278 // stack: ..., a, b, c, b, c
1279 __ store_ptr(3, rcx); // store c in b
1280 // stack: ..., a, c, c, b, c
1281 __ load_ptr( 4, rcx); // load a
1282 __ store_ptr(2, rcx); // store a in 2nd c
1283 // stack: ..., a, c, a, b, c
1284 __ store_ptr(4, rax); // store b in a
1285 // stack: ..., b, c, a, b, c
1286 }
1287
1288 void TemplateTable::dup2_x2() {
1289 transition(vtos, vtos);
1290 // stack: ..., a, b, c, d
1291 __ load_ptr( 0, rcx); // load d
1292 __ load_ptr( 1, rax); // load c
1293 __ push_ptr(rax); // push c
1294 __ push_ptr(rcx); // push d
1295 // stack: ..., a, b, c, d, c, d
1296 __ load_ptr( 4, rax); // load b
1297 __ store_ptr(2, rax); // store b in d
1298 __ store_ptr(4, rcx); // store d in b
1299 // stack: ..., a, d, c, b, c, d
1300 __ load_ptr( 5, rcx); // load a
1301 __ load_ptr( 3, rax); // load c
1302 __ store_ptr(3, rcx); // store a in c
1303 __ store_ptr(5, rax); // store c in a
1304 // stack: ..., c, d, a, b, c, d
1305 }
1306
1307 void TemplateTable::swap() {
1308 transition(vtos, vtos);
1309 // stack: ..., a, b
1310 __ load_ptr( 1, rcx); // load a
1311 __ load_ptr( 0, rax); // load b
1312 __ store_ptr(0, rcx); // store a in b
1313 __ store_ptr(1, rax); // store b in a
1314 // stack: ..., b, a
1315 }
1316
1317 void TemplateTable::iop2(Operation op) {
1318 transition(itos, itos);
1319 switch (op) {
1320 case add : __ pop_i(rdx); __ addl (rax, rdx); break;
1321 case sub : __ movl(rdx, rax); __ pop_i(rax); __ subl (rax, rdx); break;
1322 case mul : __ pop_i(rdx); __ imull(rax, rdx); break;
1323 case _and : __ pop_i(rdx); __ andl (rax, rdx); break;
1324 case _or : __ pop_i(rdx); __ orl (rax, rdx); break;
1325 case _xor : __ pop_i(rdx); __ xorl (rax, rdx); break;
1326 case shl : __ movl(rcx, rax); __ pop_i(rax); __ shll (rax); break;
1327 case shr : __ movl(rcx, rax); __ pop_i(rax); __ sarl (rax); break;
1328 case ushr : __ movl(rcx, rax); __ pop_i(rax); __ shrl (rax); break;
1329 default : ShouldNotReachHere();
1330 }
1331 }
1332
1333 void TemplateTable::lop2(Operation op) {
1334 transition(ltos, ltos);
1335 #ifdef _LP64
1336 switch (op) {
1337 case add : __ pop_l(rdx); __ addptr(rax, rdx); break;
1338 case sub : __ mov(rdx, rax); __ pop_l(rax); __ subptr(rax, rdx); break;
1339 case _and : __ pop_l(rdx); __ andptr(rax, rdx); break;
1340 case _or : __ pop_l(rdx); __ orptr (rax, rdx); break;
1341 case _xor : __ pop_l(rdx); __ xorptr(rax, rdx); break;
1342 default : ShouldNotReachHere();
1343 }
1344 #else
1345 __ pop_l(rbx, rcx);
1346 switch (op) {
1347 case add : __ addl(rax, rbx); __ adcl(rdx, rcx); break;
1348 case sub : __ subl(rbx, rax); __ sbbl(rcx, rdx);
1349 __ mov (rax, rbx); __ mov (rdx, rcx); break;
1350 case _and : __ andl(rax, rbx); __ andl(rdx, rcx); break;
1351 case _or : __ orl (rax, rbx); __ orl (rdx, rcx); break;
1352 case _xor : __ xorl(rax, rbx); __ xorl(rdx, rcx); break;
1353 default : ShouldNotReachHere();
1354 }
1355 #endif
1356 }
1357
1358 void TemplateTable::idiv() {
1359 transition(itos, itos);
1360 __ movl(rcx, rax);
1361 __ pop_i(rax);
1362 // Note: could xor rax and ecx and compare with (-1 ^ min_int). If
1363 // they are not equal, one could do a normal division (no correction
1364 // needed), which may speed up this implementation for the common case.
1365 // (see also JVM spec., p.243 & p.271)
1366 __ corrected_idivl(rcx);
1367 }
1368
1369 void TemplateTable::irem() {
1370 transition(itos, itos);
1371 __ movl(rcx, rax);
1372 __ pop_i(rax);
1373 // Note: could xor rax and ecx and compare with (-1 ^ min_int). If
1374 // they are not equal, one could do a normal division (no correction
1375 // needed), which may speed up this implementation for the common case.
1376 // (see also JVM spec., p.243 & p.271)
1377 __ corrected_idivl(rcx);
1378 __ movl(rax, rdx);
1379 }
1380
1381 void TemplateTable::lmul() {
1382 transition(ltos, ltos);
1383 #ifdef _LP64
1384 __ pop_l(rdx);
1385 __ imulq(rax, rdx);
1386 #else
1387 __ pop_l(rbx, rcx);
1388 __ push(rcx); __ push(rbx);
1389 __ push(rdx); __ push(rax);
1390 __ lmul(2 * wordSize, 0);
1391 __ addptr(rsp, 4 * wordSize); // take off temporaries
1392 #endif
1393 }
1394
1395 void TemplateTable::ldiv() {
1396 transition(ltos, ltos);
1397 #ifdef _LP64
1398 __ mov(rcx, rax);
1399 __ pop_l(rax);
1400 // generate explicit div0 check
1401 __ testq(rcx, rcx);
1402 __ jump_cc(Assembler::zero,
1403 ExternalAddress(Interpreter::_throw_ArithmeticException_entry));
1404 // Note: could xor rax and rcx and compare with (-1 ^ min_int). If
1405 // they are not equal, one could do a normal division (no correction
1406 // needed), which may speed up this implementation for the common case.
1407 // (see also JVM spec., p.243 & p.271)
1408 __ corrected_idivq(rcx); // kills rbx
1409 #else
1410 __ pop_l(rbx, rcx);
1411 __ push(rcx); __ push(rbx);
1412 __ push(rdx); __ push(rax);
1413 // check if y = 0
1414 __ orl(rax, rdx);
1415 __ jump_cc(Assembler::zero,
1416 ExternalAddress(Interpreter::_throw_ArithmeticException_entry));
1417 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::ldiv));
1418 __ addptr(rsp, 4 * wordSize); // take off temporaries
1419 #endif
1420 }
1421
1422 void TemplateTable::lrem() {
1423 transition(ltos, ltos);
1424 #ifdef _LP64
1425 __ mov(rcx, rax);
1426 __ pop_l(rax);
1427 __ testq(rcx, rcx);
1428 __ jump_cc(Assembler::zero,
1429 ExternalAddress(Interpreter::_throw_ArithmeticException_entry));
1430 // Note: could xor rax and rcx and compare with (-1 ^ min_int). If
1431 // they are not equal, one could do a normal division (no correction
1432 // needed), which may speed up this implementation for the common case.
1433 // (see also JVM spec., p.243 & p.271)
1434 __ corrected_idivq(rcx); // kills rbx
1435 __ mov(rax, rdx);
1436 #else
1437 __ pop_l(rbx, rcx);
1438 __ push(rcx); __ push(rbx);
1439 __ push(rdx); __ push(rax);
1440 // check if y = 0
1441 __ orl(rax, rdx);
1442 __ jump_cc(Assembler::zero,
1443 ExternalAddress(Interpreter::_throw_ArithmeticException_entry));
1444 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::lrem));
1445 __ addptr(rsp, 4 * wordSize);
1446 #endif
1447 }
1448
1449 void TemplateTable::lshl() {
1450 transition(itos, ltos);
1451 __ movl(rcx, rax); // get shift count
1452 #ifdef _LP64
1453 __ pop_l(rax); // get shift value
1454 __ shlq(rax);
1455 #else
1456 __ pop_l(rax, rdx); // get shift value
1457 __ lshl(rdx, rax);
1458 #endif
1459 }
1460
1461 void TemplateTable::lshr() {
1462 #ifdef _LP64
1463 transition(itos, ltos);
1464 __ movl(rcx, rax); // get shift count
1465 __ pop_l(rax); // get shift value
1466 __ sarq(rax);
1467 #else
1468 transition(itos, ltos);
1469 __ mov(rcx, rax); // get shift count
1470 __ pop_l(rax, rdx); // get shift value
1471 __ lshr(rdx, rax, true);
1472 #endif
1473 }
1474
1475 void TemplateTable::lushr() {
1476 transition(itos, ltos);
1477 #ifdef _LP64
1478 __ movl(rcx, rax); // get shift count
1479 __ pop_l(rax); // get shift value
1480 __ shrq(rax);
1481 #else
1482 __ mov(rcx, rax); // get shift count
1483 __ pop_l(rax, rdx); // get shift value
1484 __ lshr(rdx, rax);
1485 #endif
1486 }
1487
1488 void TemplateTable::fop2(Operation op) {
1489 transition(ftos, ftos);
1490
1491 if (UseSSE >= 1) {
1492 switch (op) {
1493 case add:
1494 __ addss(xmm0, at_rsp());
1495 __ addptr(rsp, Interpreter::stackElementSize);
1496 break;
1497 case sub:
1498 __ movflt(xmm1, xmm0);
1499 __ pop_f(xmm0);
1500 __ subss(xmm0, xmm1);
1501 break;
1502 case mul:
1503 __ mulss(xmm0, at_rsp());
1504 __ addptr(rsp, Interpreter::stackElementSize);
1505 break;
1506 case div:
1507 __ movflt(xmm1, xmm0);
1508 __ pop_f(xmm0);
1509 __ divss(xmm0, xmm1);
1510 break;
1511 case rem:
1512 // On x86_64 platforms the SharedRuntime::frem method is called to perform the
1513 // modulo operation. The frem method calls the function
1514 // double fmod(double x, double y) in math.h. The documentation of fmod states:
1515 // "If x or y is a NaN, a NaN is returned." without specifying what type of NaN
1516 // (signalling or quiet) is returned.
1517 //
1518 // On x86_32 platforms the FPU is used to perform the modulo operation. The
1519 // reason is that on 32-bit Windows the sign of modulo operations diverges from
1520 // what is considered the standard (e.g., -0.0f % -3.14f is 0.0f (and not -0.0f).
1521 // The fprem instruction used on x86_32 is functionally equivalent to
1522 // SharedRuntime::frem in that it returns a NaN.
1523 #ifdef _LP64
1524 __ movflt(xmm1, xmm0);
1525 __ pop_f(xmm0);
1526 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::frem), 2);
1527 #else
1528 __ push_f(xmm0);
1529 __ pop_f();
1530 __ fld_s(at_rsp());
1531 __ fremr(rax);
1532 __ f2ieee();
1533 __ pop(rax); // pop second operand off the stack
1534 __ push_f();
1535 __ pop_f(xmm0);
1536 #endif
1537 break;
1538 default:
1539 ShouldNotReachHere();
1540 break;
1541 }
1542 } else {
1543 #ifdef _LP64
1544 ShouldNotReachHere();
1545 #else
1546 switch (op) {
1547 case add: __ fadd_s (at_rsp()); break;
1548 case sub: __ fsubr_s(at_rsp()); break;
1549 case mul: __ fmul_s (at_rsp()); break;
1550 case div: __ fdivr_s(at_rsp()); break;
1551 case rem: __ fld_s (at_rsp()); __ fremr(rax); break;
1552 default : ShouldNotReachHere();
1553 }
1554 __ f2ieee();
1555 __ pop(rax); // pop second operand off the stack
1556 #endif // _LP64
1557 }
1558 }
1559
1560 void TemplateTable::dop2(Operation op) {
1561 transition(dtos, dtos);
1562 if (UseSSE >= 2) {
1563 switch (op) {
1564 case add:
1565 __ addsd(xmm0, at_rsp());
1566 __ addptr(rsp, 2 * Interpreter::stackElementSize);
1567 break;
1568 case sub:
1569 __ movdbl(xmm1, xmm0);
1570 __ pop_d(xmm0);
1571 __ subsd(xmm0, xmm1);
1572 break;
1573 case mul:
1574 __ mulsd(xmm0, at_rsp());
1575 __ addptr(rsp, 2 * Interpreter::stackElementSize);
1576 break;
1577 case div:
1578 __ movdbl(xmm1, xmm0);
1579 __ pop_d(xmm0);
1580 __ divsd(xmm0, xmm1);
1581 break;
1582 case rem:
1583 // Similar to fop2(), the modulo operation is performed using the
1584 // SharedRuntime::drem method (on x86_64 platforms) or using the
1585 // FPU (on x86_32 platforms) for the same reasons as mentioned in fop2().
1586 #ifdef _LP64
1587 __ movdbl(xmm1, xmm0);
1588 __ pop_d(xmm0);
1589 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::drem), 2);
1590 #else
1591 __ push_d(xmm0);
1592 __ pop_d();
1593 __ fld_d(at_rsp());
1594 __ fremr(rax);
1595 __ d2ieee();
1596 __ pop(rax);
1597 __ pop(rdx);
1598 __ push_d();
1599 __ pop_d(xmm0);
1600 #endif
1601 break;
1602 default:
1603 ShouldNotReachHere();
1604 break;
1605 }
1606 } else {
1607 #ifdef _LP64
1608 ShouldNotReachHere();
1609 #else
1610 switch (op) {
1611 case add: __ fadd_d (at_rsp()); break;
1612 case sub: __ fsubr_d(at_rsp()); break;
1613 case mul: {
1614 Label L_strict;
1615 Label L_join;
1616 const Address access_flags (rcx, Method::access_flags_offset());
1617 __ get_method(rcx);
1618 __ movl(rcx, access_flags);
1619 __ testl(rcx, JVM_ACC_STRICT);
1620 __ jccb(Assembler::notZero, L_strict);
1621 __ fmul_d (at_rsp());
1622 __ jmpb(L_join);
1623 __ bind(L_strict);
1624 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias1()));
1625 __ fmulp();
1626 __ fmul_d (at_rsp());
1627 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias2()));
1628 __ fmulp();
1629 __ bind(L_join);
1630 break;
1631 }
1632 case div: {
1633 Label L_strict;
1634 Label L_join;
1635 const Address access_flags (rcx, Method::access_flags_offset());
1636 __ get_method(rcx);
1637 __ movl(rcx, access_flags);
1638 __ testl(rcx, JVM_ACC_STRICT);
1639 __ jccb(Assembler::notZero, L_strict);
1640 __ fdivr_d(at_rsp());
1641 __ jmp(L_join);
1642 __ bind(L_strict);
1643 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias1()));
1644 __ fmul_d (at_rsp());
1645 __ fdivrp();
1646 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias2()));
1647 __ fmulp();
1648 __ bind(L_join);
1649 break;
1650 }
1651 case rem: __ fld_d (at_rsp()); __ fremr(rax); break;
1652 default : ShouldNotReachHere();
1653 }
1654 __ d2ieee();
1655 // Pop double precision number from rsp.
1656 __ pop(rax);
1657 __ pop(rdx);
1658 #endif
1659 }
1660 }
1661
1662 void TemplateTable::ineg() {
1663 transition(itos, itos);
1664 __ negl(rax);
1665 }
1666
1667 void TemplateTable::lneg() {
1668 transition(ltos, ltos);
1669 LP64_ONLY(__ negq(rax));
1670 NOT_LP64(__ lneg(rdx, rax));
1671 }
1672
1673 // Note: 'double' and 'long long' have 32-bits alignment on x86.
1674 static jlong* double_quadword(jlong *adr, jlong lo, jlong hi) {
1675 // Use the expression (adr)&(~0xF) to provide 128-bits aligned address
1676 // of 128-bits operands for SSE instructions.
1677 jlong *operand = (jlong*)(((intptr_t)adr)&((intptr_t)(~0xF)));
1678 // Store the value to a 128-bits operand.
1679 operand[0] = lo;
1680 operand[1] = hi;
1681 return operand;
1682 }
1683
1684 // Buffer for 128-bits masks used by SSE instructions.
1685 static jlong float_signflip_pool[2*2];
1686 static jlong double_signflip_pool[2*2];
1687
1688 void TemplateTable::fneg() {
1689 transition(ftos, ftos);
1690 if (UseSSE >= 1) {
1691 static jlong *float_signflip = double_quadword(&float_signflip_pool[1], CONST64(0x8000000080000000), CONST64(0x8000000080000000));
1692 __ xorps(xmm0, ExternalAddress((address) float_signflip));
1693 } else {
1694 LP64_ONLY(ShouldNotReachHere());
1695 NOT_LP64(__ fchs());
1696 }
1697 }
1698
1699 void TemplateTable::dneg() {
1700 transition(dtos, dtos);
1701 if (UseSSE >= 2) {
1702 static jlong *double_signflip =
1703 double_quadword(&double_signflip_pool[1], CONST64(0x8000000000000000), CONST64(0x8000000000000000));
1704 __ xorpd(xmm0, ExternalAddress((address) double_signflip));
1705 } else {
1706 #ifdef _LP64
1707 ShouldNotReachHere();
1708 #else
1709 __ fchs();
1710 #endif
1711 }
1712 }
1713
1714 void TemplateTable::iinc() {
1715 transition(vtos, vtos);
1716 __ load_signed_byte(rdx, at_bcp(2)); // get constant
1717 locals_index(rbx);
1718 __ addl(iaddress(rbx), rdx);
1719 }
1720
1721 void TemplateTable::wide_iinc() {
1722 transition(vtos, vtos);
1723 __ movl(rdx, at_bcp(4)); // get constant
1724 locals_index_wide(rbx);
1725 __ bswapl(rdx); // swap bytes & sign-extend constant
1726 __ sarl(rdx, 16);
1727 __ addl(iaddress(rbx), rdx);
1728 // Note: should probably use only one movl to get both
1729 // the index and the constant -> fix this
1730 }
1731
1732 void TemplateTable::convert() {
1733 #ifdef _LP64
1734 // Checking
1735 #ifdef ASSERT
1736 {
1737 TosState tos_in = ilgl;
1738 TosState tos_out = ilgl;
1739 switch (bytecode()) {
1740 case Bytecodes::_i2l: // fall through
1741 case Bytecodes::_i2f: // fall through
1742 case Bytecodes::_i2d: // fall through
1743 case Bytecodes::_i2b: // fall through
1744 case Bytecodes::_i2c: // fall through
1745 case Bytecodes::_i2s: tos_in = itos; break;
1746 case Bytecodes::_l2i: // fall through
1747 case Bytecodes::_l2f: // fall through
1748 case Bytecodes::_l2d: tos_in = ltos; break;
1749 case Bytecodes::_f2i: // fall through
1750 case Bytecodes::_f2l: // fall through
1751 case Bytecodes::_f2d: tos_in = ftos; break;
1752 case Bytecodes::_d2i: // fall through
1753 case Bytecodes::_d2l: // fall through
1754 case Bytecodes::_d2f: tos_in = dtos; break;
1755 default : ShouldNotReachHere();
1756 }
1757 switch (bytecode()) {
1758 case Bytecodes::_l2i: // fall through
1759 case Bytecodes::_f2i: // fall through
1760 case Bytecodes::_d2i: // fall through
1761 case Bytecodes::_i2b: // fall through
1762 case Bytecodes::_i2c: // fall through
1763 case Bytecodes::_i2s: tos_out = itos; break;
1764 case Bytecodes::_i2l: // fall through
1765 case Bytecodes::_f2l: // fall through
1766 case Bytecodes::_d2l: tos_out = ltos; break;
1767 case Bytecodes::_i2f: // fall through
1768 case Bytecodes::_l2f: // fall through
1769 case Bytecodes::_d2f: tos_out = ftos; break;
1770 case Bytecodes::_i2d: // fall through
1771 case Bytecodes::_l2d: // fall through
1772 case Bytecodes::_f2d: tos_out = dtos; break;
1773 default : ShouldNotReachHere();
1774 }
1775 transition(tos_in, tos_out);
1776 }
1777 #endif // ASSERT
1778
1779 static const int64_t is_nan = 0x8000000000000000L;
1780
1781 // Conversion
1782 switch (bytecode()) {
1783 case Bytecodes::_i2l:
1784 __ movslq(rax, rax);
1785 break;
1786 case Bytecodes::_i2f:
1787 __ cvtsi2ssl(xmm0, rax);
1788 break;
1789 case Bytecodes::_i2d:
1790 __ cvtsi2sdl(xmm0, rax);
1791 break;
1792 case Bytecodes::_i2b:
1793 __ movsbl(rax, rax);
1794 break;
1795 case Bytecodes::_i2c:
1796 __ movzwl(rax, rax);
1797 break;
1798 case Bytecodes::_i2s:
1799 __ movswl(rax, rax);
1800 break;
1801 case Bytecodes::_l2i:
1802 __ movl(rax, rax);
1803 break;
1804 case Bytecodes::_l2f:
1805 __ cvtsi2ssq(xmm0, rax);
1806 break;
1807 case Bytecodes::_l2d:
1808 __ cvtsi2sdq(xmm0, rax);
1809 break;
1810 case Bytecodes::_f2i:
1811 {
1812 Label L;
1813 __ cvttss2sil(rax, xmm0);
1814 __ cmpl(rax, 0x80000000); // NaN or overflow/underflow?
1815 __ jcc(Assembler::notEqual, L);
1816 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2i), 1);
1817 __ bind(L);
1818 }
1819 break;
1820 case Bytecodes::_f2l:
1821 {
1822 Label L;
1823 __ cvttss2siq(rax, xmm0);
1824 // NaN or overflow/underflow?
1825 __ cmp64(rax, ExternalAddress((address) &is_nan));
1826 __ jcc(Assembler::notEqual, L);
1827 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2l), 1);
1828 __ bind(L);
1829 }
1830 break;
1831 case Bytecodes::_f2d:
1832 __ cvtss2sd(xmm0, xmm0);
1833 break;
1834 case Bytecodes::_d2i:
1835 {
1836 Label L;
1837 __ cvttsd2sil(rax, xmm0);
1838 __ cmpl(rax, 0x80000000); // NaN or overflow/underflow?
1839 __ jcc(Assembler::notEqual, L);
1840 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2i), 1);
1841 __ bind(L);
1842 }
1843 break;
1844 case Bytecodes::_d2l:
1845 {
1846 Label L;
1847 __ cvttsd2siq(rax, xmm0);
1848 // NaN or overflow/underflow?
1849 __ cmp64(rax, ExternalAddress((address) &is_nan));
1850 __ jcc(Assembler::notEqual, L);
1851 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2l), 1);
1852 __ bind(L);
1853 }
1854 break;
1855 case Bytecodes::_d2f:
1856 __ cvtsd2ss(xmm0, xmm0);
1857 break;
1858 default:
1859 ShouldNotReachHere();
1860 }
1861 #else
1862 // Checking
1863 #ifdef ASSERT
1864 { TosState tos_in = ilgl;
1865 TosState tos_out = ilgl;
1866 switch (bytecode()) {
1867 case Bytecodes::_i2l: // fall through
1868 case Bytecodes::_i2f: // fall through
1869 case Bytecodes::_i2d: // fall through
1870 case Bytecodes::_i2b: // fall through
1871 case Bytecodes::_i2c: // fall through
1872 case Bytecodes::_i2s: tos_in = itos; break;
1873 case Bytecodes::_l2i: // fall through
1874 case Bytecodes::_l2f: // fall through
1875 case Bytecodes::_l2d: tos_in = ltos; break;
1876 case Bytecodes::_f2i: // fall through
1877 case Bytecodes::_f2l: // fall through
1878 case Bytecodes::_f2d: tos_in = ftos; break;
1879 case Bytecodes::_d2i: // fall through
1880 case Bytecodes::_d2l: // fall through
1881 case Bytecodes::_d2f: tos_in = dtos; break;
1882 default : ShouldNotReachHere();
1883 }
1884 switch (bytecode()) {
1885 case Bytecodes::_l2i: // fall through
1886 case Bytecodes::_f2i: // fall through
1887 case Bytecodes::_d2i: // fall through
1888 case Bytecodes::_i2b: // fall through
1889 case Bytecodes::_i2c: // fall through
1890 case Bytecodes::_i2s: tos_out = itos; break;
1891 case Bytecodes::_i2l: // fall through
1892 case Bytecodes::_f2l: // fall through
1893 case Bytecodes::_d2l: tos_out = ltos; break;
1894 case Bytecodes::_i2f: // fall through
1895 case Bytecodes::_l2f: // fall through
1896 case Bytecodes::_d2f: tos_out = ftos; break;
1897 case Bytecodes::_i2d: // fall through
1898 case Bytecodes::_l2d: // fall through
1899 case Bytecodes::_f2d: tos_out = dtos; break;
1900 default : ShouldNotReachHere();
1901 }
1902 transition(tos_in, tos_out);
1903 }
1904 #endif // ASSERT
1905
1906 // Conversion
1907 // (Note: use push(rcx)/pop(rcx) for 1/2-word stack-ptr manipulation)
1908 switch (bytecode()) {
1909 case Bytecodes::_i2l:
1910 __ extend_sign(rdx, rax);
1911 break;
1912 case Bytecodes::_i2f:
1913 if (UseSSE >= 1) {
1914 __ cvtsi2ssl(xmm0, rax);
1915 } else {
1916 __ push(rax); // store int on tos
1917 __ fild_s(at_rsp()); // load int to ST0
1918 __ f2ieee(); // truncate to float size
1919 __ pop(rcx); // adjust rsp
1920 }
1921 break;
1922 case Bytecodes::_i2d:
1923 if (UseSSE >= 2) {
1924 __ cvtsi2sdl(xmm0, rax);
1925 } else {
1926 __ push(rax); // add one slot for d2ieee()
1927 __ push(rax); // store int on tos
1928 __ fild_s(at_rsp()); // load int to ST0
1929 __ d2ieee(); // truncate to double size
1930 __ pop(rcx); // adjust rsp
1931 __ pop(rcx);
1932 }
1933 break;
1934 case Bytecodes::_i2b:
1935 __ shll(rax, 24); // truncate upper 24 bits
1936 __ sarl(rax, 24); // and sign-extend byte
1937 LP64_ONLY(__ movsbl(rax, rax));
1938 break;
1939 case Bytecodes::_i2c:
1940 __ andl(rax, 0xFFFF); // truncate upper 16 bits
1941 LP64_ONLY(__ movzwl(rax, rax));
1942 break;
1943 case Bytecodes::_i2s:
1944 __ shll(rax, 16); // truncate upper 16 bits
1945 __ sarl(rax, 16); // and sign-extend short
1946 LP64_ONLY(__ movswl(rax, rax));
1947 break;
1948 case Bytecodes::_l2i:
1949 /* nothing to do */
1950 break;
1951 case Bytecodes::_l2f:
1952 // On 64-bit platforms, the cvtsi2ssq instruction is used to convert
1953 // 64-bit long values to floats. On 32-bit platforms it is not possible
1954 // to use that instruction with 64-bit operands, therefore the FPU is
1955 // used to perform the conversion.
1956 __ push(rdx); // store long on tos
1957 __ push(rax);
1958 __ fild_d(at_rsp()); // load long to ST0
1959 __ f2ieee(); // truncate to float size
1960 __ pop(rcx); // adjust rsp
1961 __ pop(rcx);
1962 if (UseSSE >= 1) {
1963 __ push_f();
1964 __ pop_f(xmm0);
1965 }
1966 break;
1967 case Bytecodes::_l2d:
1968 // On 32-bit platforms the FPU is used for conversion because on
1969 // 32-bit platforms it is not not possible to use the cvtsi2sdq
1970 // instruction with 64-bit operands.
1971 __ push(rdx); // store long on tos
1972 __ push(rax);
1973 __ fild_d(at_rsp()); // load long to ST0
1974 __ d2ieee(); // truncate to double size
1975 __ pop(rcx); // adjust rsp
1976 __ pop(rcx);
1977 if (UseSSE >= 2) {
1978 __ push_d();
1979 __ pop_d(xmm0);
1980 }
1981 break;
1982 case Bytecodes::_f2i:
1983 // SharedRuntime::f2i does not differentiate between sNaNs and qNaNs
1984 // as it returns 0 for any NaN.
1985 if (UseSSE >= 1) {
1986 __ push_f(xmm0);
1987 } else {
1988 __ push(rcx); // reserve space for argument
1989 __ fstp_s(at_rsp()); // pass float argument on stack
1990 }
1991 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2i), 1);
1992 break;
1993 case Bytecodes::_f2l:
1994 // SharedRuntime::f2l does not differentiate between sNaNs and qNaNs
1995 // as it returns 0 for any NaN.
1996 if (UseSSE >= 1) {
1997 __ push_f(xmm0);
1998 } else {
1999 __ push(rcx); // reserve space for argument
2000 __ fstp_s(at_rsp()); // pass float argument on stack
2001 }
2002 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2l), 1);
2003 break;
2004 case Bytecodes::_f2d:
2005 if (UseSSE < 1) {
2006 /* nothing to do */
2007 } else if (UseSSE == 1) {
2008 __ push_f(xmm0);
2009 __ pop_f();
2010 } else { // UseSSE >= 2
2011 __ cvtss2sd(xmm0, xmm0);
2012 }
2013 break;
2014 case Bytecodes::_d2i:
2015 if (UseSSE >= 2) {
2016 __ push_d(xmm0);
2017 } else {
2018 __ push(rcx); // reserve space for argument
2019 __ push(rcx);
2020 __ fstp_d(at_rsp()); // pass double argument on stack
2021 }
2022 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2i), 2);
2023 break;
2024 case Bytecodes::_d2l:
2025 if (UseSSE >= 2) {
2026 __ push_d(xmm0);
2027 } else {
2028 __ push(rcx); // reserve space for argument
2029 __ push(rcx);
2030 __ fstp_d(at_rsp()); // pass double argument on stack
2031 }
2032 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2l), 2);
2033 break;
2034 case Bytecodes::_d2f:
2035 if (UseSSE <= 1) {
2036 __ push(rcx); // reserve space for f2ieee()
2037 __ f2ieee(); // truncate to float size
2038 __ pop(rcx); // adjust rsp
2039 if (UseSSE == 1) {
2040 // The cvtsd2ss instruction is not available if UseSSE==1, therefore
2041 // the conversion is performed using the FPU in this case.
2042 __ push_f();
2043 __ pop_f(xmm0);
2044 }
2045 } else { // UseSSE >= 2
2046 __ cvtsd2ss(xmm0, xmm0);
2047 }
2048 break;
2049 default :
2050 ShouldNotReachHere();
2051 }
2052 #endif
2053 }
2054
2055 void TemplateTable::lcmp() {
2056 transition(ltos, itos);
2057 #ifdef _LP64
2058 Label done;
2059 __ pop_l(rdx);
2060 __ cmpq(rdx, rax);
2061 __ movl(rax, -1);
2062 __ jccb(Assembler::less, done);
2063 __ setb(Assembler::notEqual, rax);
2064 __ movzbl(rax, rax);
2065 __ bind(done);
2066 #else
2067
2068 // y = rdx:rax
2069 __ pop_l(rbx, rcx); // get x = rcx:rbx
2070 __ lcmp2int(rcx, rbx, rdx, rax);// rcx := cmp(x, y)
2071 __ mov(rax, rcx);
2072 #endif
2073 }
2074
2075 void TemplateTable::float_cmp(bool is_float, int unordered_result) {
2076 if ((is_float && UseSSE >= 1) ||
2077 (!is_float && UseSSE >= 2)) {
2078 Label done;
2079 if (is_float) {
2080 // XXX get rid of pop here, use ... reg, mem32
2081 __ pop_f(xmm1);
2082 __ ucomiss(xmm1, xmm0);
2083 } else {
2084 // XXX get rid of pop here, use ... reg, mem64
2085 __ pop_d(xmm1);
2086 __ ucomisd(xmm1, xmm0);
2087 }
2088 if (unordered_result < 0) {
2089 __ movl(rax, -1);
2090 __ jccb(Assembler::parity, done);
2091 __ jccb(Assembler::below, done);
2092 __ setb(Assembler::notEqual, rdx);
2093 __ movzbl(rax, rdx);
2094 } else {
2095 __ movl(rax, 1);
2096 __ jccb(Assembler::parity, done);
2097 __ jccb(Assembler::above, done);
2098 __ movl(rax, 0);
2099 __ jccb(Assembler::equal, done);
2100 __ decrementl(rax);
2101 }
2102 __ bind(done);
2103 } else {
2104 #ifdef _LP64
2105 ShouldNotReachHere();
2106 #else
2107 if (is_float) {
2108 __ fld_s(at_rsp());
2109 } else {
2110 __ fld_d(at_rsp());
2111 __ pop(rdx);
2112 }
2113 __ pop(rcx);
2114 __ fcmp2int(rax, unordered_result < 0);
2115 #endif // _LP64
2116 }
2117 }
2118
2119 void TemplateTable::branch(bool is_jsr, bool is_wide) {
2120 if (ValueTypesThreadLocalRecycling) {
2121 Label no_vt_recycling, no_fixing_required;
2122 const Register thread1 = NOT_LP64(rbx) LP64_ONLY(r15_thread);
2123 NOT_LP64(__ get_thread(thread1));
2124 __ movptr(rbx, Address(thread1, in_bytes(JavaThread::vt_alloc_ptr_offset())));
2125 __ testptr(rbx, rbx);
2126 __ jcc(Assembler::zero, no_vt_recycling);
2127 __ movptr(rcx, Address(rbp, frame::interpreter_frame_vt_alloc_ptr_offset * wordSize));
2128 __ testptr(rcx, rcx);
2129 __ jcc(Assembler::notZero, no_fixing_required);
2130 // vt_alloc_ptr in JavaThread is non-null but frame vt_alloc_ptr is null
2131 // which means frame vt_alloc_ptr needs to be initialized
2132 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::fix_frame_vt_alloc_ptr));
2133 __ movptr(rcx, Address(rbp, frame::interpreter_frame_vt_alloc_ptr_offset * wordSize));
2134 __ bind(no_fixing_required);
2135 __ testptr(rcx, rbx);
2136 __ jcc(Assembler::equal, no_vt_recycling);
2137 __ andptr(rcx, VTBufferChunk::chunk_mask());
2138 __ movl(rcx, Address(rcx, VTBufferChunk::index_offset()));
2139 __ andptr(rbx, VTBufferChunk::chunk_mask());
2140 __ movl(rbx, Address(rbx, VTBufferChunk::index_offset()));
2141 __ subl(rbx, rcx);
2142 __ get_method(rcx);
2143 __ movl(rcx, Address(rcx, Method::max_vt_buffer_offset()));
2144 __ cmpl(rbx, rcx);
2145 __ jcc(Assembler::lessEqual, no_vt_recycling);
2146 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::recycle_buffered_values));
2147 __ bind(no_vt_recycling);
2148 }
2149
2150 __ get_method(rcx); // rcx holds method
2151 __ profile_taken_branch(rax, rbx); // rax holds updated MDP, rbx
2152 // holds bumped taken count
2153
2154 const ByteSize be_offset = MethodCounters::backedge_counter_offset() +
2155 InvocationCounter::counter_offset();
2156 const ByteSize inv_offset = MethodCounters::invocation_counter_offset() +
2157 InvocationCounter::counter_offset();
2158
2159 // Load up edx with the branch displacement
2160 if (is_wide) {
2161 __ movl(rdx, at_bcp(1));
2162 } else {
2163 __ load_signed_short(rdx, at_bcp(1));
2164 }
2165 __ bswapl(rdx);
2166
2167 if (!is_wide) {
2168 __ sarl(rdx, 16);
2169 }
2170 LP64_ONLY(__ movl2ptr(rdx, rdx));
2171
2172 // Handle all the JSR stuff here, then exit.
2173 // It's much shorter and cleaner than intermingling with the non-JSR
2174 // normal-branch stuff occurring below.
2175 if (is_jsr) {
2176 // Pre-load the next target bytecode into rbx
2177 __ load_unsigned_byte(rbx, Address(rbcp, rdx, Address::times_1, 0));
2178
2179 // compute return address as bci in rax
2180 __ lea(rax, at_bcp((is_wide ? 5 : 3) -
2181 in_bytes(ConstMethod::codes_offset())));
2182 __ subptr(rax, Address(rcx, Method::const_offset()));
2183 // Adjust the bcp in r13 by the displacement in rdx
2184 __ addptr(rbcp, rdx);
2185 // jsr returns atos that is not an oop
2186 __ push_i(rax);
2187 __ dispatch_only(vtos, true);
2188 return;
2189 }
2190
2191 // Normal (non-jsr) branch handling
2192
2193 // Adjust the bcp in r13 by the displacement in rdx
2194 __ addptr(rbcp, rdx);
2195
2196 assert(UseLoopCounter || !UseOnStackReplacement,
2197 "on-stack-replacement requires loop counters");
2198 Label backedge_counter_overflow;
2199 Label profile_method;
2200 Label dispatch;
2201 if (UseLoopCounter) {
2202 // increment backedge counter for backward branches
2203 // rax: MDO
2204 // rbx: MDO bumped taken-count
2205 // rcx: method
2206 // rdx: target offset
2207 // r13: target bcp
2208 // r14: locals pointer
2209 __ testl(rdx, rdx); // check if forward or backward branch
2210 __ jcc(Assembler::positive, dispatch); // count only if backward branch
2211
2212 // check if MethodCounters exists
2213 Label has_counters;
2214 __ movptr(rax, Address(rcx, Method::method_counters_offset()));
2215 __ testptr(rax, rax);
2216 __ jcc(Assembler::notZero, has_counters);
2217 __ push(rdx);
2218 __ push(rcx);
2219 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::build_method_counters),
2220 rcx);
2221 __ pop(rcx);
2222 __ pop(rdx);
2223 __ movptr(rax, Address(rcx, Method::method_counters_offset()));
2224 __ testptr(rax, rax);
2225 __ jcc(Assembler::zero, dispatch);
2226 __ bind(has_counters);
2227
2228 if (TieredCompilation) {
2229 Label no_mdo;
2230 int increment = InvocationCounter::count_increment;
2231 if (ProfileInterpreter) {
2232 // Are we profiling?
2233 __ movptr(rbx, Address(rcx, in_bytes(Method::method_data_offset())));
2234 __ testptr(rbx, rbx);
2235 __ jccb(Assembler::zero, no_mdo);
2236 // Increment the MDO backedge counter
2237 const Address mdo_backedge_counter(rbx, in_bytes(MethodData::backedge_counter_offset()) +
2238 in_bytes(InvocationCounter::counter_offset()));
2239 const Address mask(rbx, in_bytes(MethodData::backedge_mask_offset()));
2240 __ increment_mask_and_jump(mdo_backedge_counter, increment, mask,
2241 rax, false, Assembler::zero, &backedge_counter_overflow);
2242 __ jmp(dispatch);
2243 }
2244 __ bind(no_mdo);
2245 // Increment backedge counter in MethodCounters*
2246 __ movptr(rcx, Address(rcx, Method::method_counters_offset()));
2247 const Address mask(rcx, in_bytes(MethodCounters::backedge_mask_offset()));
2248 __ increment_mask_and_jump(Address(rcx, be_offset), increment, mask,
2249 rax, false, Assembler::zero, &backedge_counter_overflow);
2250 } else { // not TieredCompilation
2251 // increment counter
2252 __ movptr(rcx, Address(rcx, Method::method_counters_offset()));
2253 __ movl(rax, Address(rcx, be_offset)); // load backedge counter
2254 __ incrementl(rax, InvocationCounter::count_increment); // increment counter
2255 __ movl(Address(rcx, be_offset), rax); // store counter
2256
2257 __ movl(rax, Address(rcx, inv_offset)); // load invocation counter
2258
2259 __ andl(rax, InvocationCounter::count_mask_value); // and the status bits
2260 __ addl(rax, Address(rcx, be_offset)); // add both counters
2261
2262 if (ProfileInterpreter) {
2263 // Test to see if we should create a method data oop
2264 __ cmp32(rax, Address(rcx, in_bytes(MethodCounters::interpreter_profile_limit_offset())));
2265 __ jcc(Assembler::less, dispatch);
2266
2267 // if no method data exists, go to profile method
2268 __ test_method_data_pointer(rax, profile_method);
2269
2270 if (UseOnStackReplacement) {
2271 // check for overflow against rbx which is the MDO taken count
2272 __ cmp32(rbx, Address(rcx, in_bytes(MethodCounters::interpreter_backward_branch_limit_offset())));
2273 __ jcc(Assembler::below, dispatch);
2274
2275 // When ProfileInterpreter is on, the backedge_count comes
2276 // from the MethodData*, which value does not get reset on
2277 // the call to frequency_counter_overflow(). To avoid
2278 // excessive calls to the overflow routine while the method is
2279 // being compiled, add a second test to make sure the overflow
2280 // function is called only once every overflow_frequency.
2281 const int overflow_frequency = 1024;
2282 __ andl(rbx, overflow_frequency - 1);
2283 __ jcc(Assembler::zero, backedge_counter_overflow);
2284
2285 }
2286 } else {
2287 if (UseOnStackReplacement) {
2288 // check for overflow against rax, which is the sum of the
2289 // counters
2290 __ cmp32(rax, Address(rcx, in_bytes(MethodCounters::interpreter_backward_branch_limit_offset())));
2291 __ jcc(Assembler::aboveEqual, backedge_counter_overflow);
2292
2293 }
2294 }
2295 }
2296 __ bind(dispatch);
2297 }
2298
2299 // Pre-load the next target bytecode into rbx
2300 __ load_unsigned_byte(rbx, Address(rbcp, 0));
2301
2302 // continue with the bytecode @ target
2303 // rax: return bci for jsr's, unused otherwise
2304 // rbx: target bytecode
2305 // r13: target bcp
2306 __ dispatch_only(vtos, true);
2307
2308 if (UseLoopCounter) {
2309 if (ProfileInterpreter) {
2310 // Out-of-line code to allocate method data oop.
2311 __ bind(profile_method);
2312 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
2313 __ set_method_data_pointer_for_bcp();
2314 __ jmp(dispatch);
2315 }
2316
2317 if (UseOnStackReplacement) {
2318 // invocation counter overflow
2319 __ bind(backedge_counter_overflow);
2320 __ negptr(rdx);
2321 __ addptr(rdx, rbcp); // branch bcp
2322 // IcoResult frequency_counter_overflow([JavaThread*], address branch_bcp)
2323 __ call_VM(noreg,
2324 CAST_FROM_FN_PTR(address,
2325 InterpreterRuntime::frequency_counter_overflow),
2326 rdx);
2327
2328 // rax: osr nmethod (osr ok) or NULL (osr not possible)
2329 // rdx: scratch
2330 // r14: locals pointer
2331 // r13: bcp
2332 __ testptr(rax, rax); // test result
2333 __ jcc(Assembler::zero, dispatch); // no osr if null
2334 // nmethod may have been invalidated (VM may block upon call_VM return)
2335 __ cmpb(Address(rax, nmethod::state_offset()), nmethod::in_use);
2336 __ jcc(Assembler::notEqual, dispatch);
2337
2338 // We have the address of an on stack replacement routine in rax.
2339 // In preparation of invoking it, first we must migrate the locals
2340 // and monitors from off the interpreter frame on the stack.
2341 // Ensure to save the osr nmethod over the migration call,
2342 // it will be preserved in rbx.
2343 __ mov(rbx, rax);
2344
2345 NOT_LP64(__ get_thread(rcx));
2346
2347 call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_begin));
2348
2349 // rax is OSR buffer, move it to expected parameter location
2350 LP64_ONLY(__ mov(j_rarg0, rax));
2351 NOT_LP64(__ mov(rcx, rax));
2352 // We use j_rarg definitions here so that registers don't conflict as parameter
2353 // registers change across platforms as we are in the midst of a calling
2354 // sequence to the OSR nmethod and we don't want collision. These are NOT parameters.
2355
2356 const Register retaddr = LP64_ONLY(j_rarg2) NOT_LP64(rdi);
2357 const Register sender_sp = LP64_ONLY(j_rarg1) NOT_LP64(rdx);
2358
2359 // pop the interpreter frame
2360 __ movptr(sender_sp, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp
2361 __ leave(); // remove frame anchor
2362 __ pop(retaddr); // get return address
2363 __ mov(rsp, sender_sp); // set sp to sender sp
2364 // Ensure compiled code always sees stack at proper alignment
2365 __ andptr(rsp, -(StackAlignmentInBytes));
2366
2367 // unlike x86 we need no specialized return from compiled code
2368 // to the interpreter or the call stub.
2369
2370 // push the return address
2371 __ push(retaddr);
2372
2373 // and begin the OSR nmethod
2374 __ jmp(Address(rbx, nmethod::osr_entry_point_offset()));
2375 }
2376 }
2377 }
2378
2379 void TemplateTable::if_0cmp(Condition cc) {
2380 transition(itos, vtos);
2381 // assume branch is more often taken than not (loops use backward branches)
2382 Label not_taken;
2383 __ testl(rax, rax);
2384 __ jcc(j_not(cc), not_taken);
2385 branch(false, false);
2386 __ bind(not_taken);
2387 __ profile_not_taken_branch(rax);
2388 }
2389
2390 void TemplateTable::if_icmp(Condition cc) {
2391 transition(itos, vtos);
2392 // assume branch is more often taken than not (loops use backward branches)
2393 Label not_taken;
2394 __ pop_i(rdx);
2395 __ cmpl(rdx, rax);
2396 __ jcc(j_not(cc), not_taken);
2397 branch(false, false);
2398 __ bind(not_taken);
2399 __ profile_not_taken_branch(rax);
2400 }
2401
2402 void TemplateTable::if_nullcmp(Condition cc) {
2403 transition(atos, vtos);
2404 // assume branch is more often taken than not (loops use backward branches)
2405 Label not_taken;
2406 __ testptr(rax, rax);
2407 __ jcc(j_not(cc), not_taken);
2408 branch(false, false);
2409 __ bind(not_taken);
2410 __ profile_not_taken_branch(rax);
2411 }
2412
2413 void TemplateTable::if_acmp(Condition cc) {
2414 transition(atos, vtos);
2415 // assume branch is more often taken than not (loops use backward branches)
2416 Label not_taken;
2417 __ pop_ptr(rdx);
2418 __ cmpoop(rdx, rax);
2419 __ jcc(j_not(cc), not_taken);
2420 branch(false, false);
2421 __ bind(not_taken);
2422 __ profile_not_taken_branch(rax);
2423 }
2424
2425 void TemplateTable::ret() {
2426 transition(vtos, vtos);
2427 locals_index(rbx);
2428 LP64_ONLY(__ movslq(rbx, iaddress(rbx))); // get return bci, compute return bcp
2429 NOT_LP64(__ movptr(rbx, iaddress(rbx)));
2430 __ profile_ret(rbx, rcx);
2431 __ get_method(rax);
2432 __ movptr(rbcp, Address(rax, Method::const_offset()));
2433 __ lea(rbcp, Address(rbcp, rbx, Address::times_1,
2434 ConstMethod::codes_offset()));
2435 __ dispatch_next(vtos, 0, true);
2436 }
2437
2438 void TemplateTable::wide_ret() {
2439 transition(vtos, vtos);
2440 locals_index_wide(rbx);
2441 __ movptr(rbx, aaddress(rbx)); // get return bci, compute return bcp
2442 __ profile_ret(rbx, rcx);
2443 __ get_method(rax);
2444 __ movptr(rbcp, Address(rax, Method::const_offset()));
2445 __ lea(rbcp, Address(rbcp, rbx, Address::times_1, ConstMethod::codes_offset()));
2446 __ dispatch_next(vtos, 0, true);
2447 }
2448
2449 void TemplateTable::tableswitch() {
2450 Label default_case, continue_execution;
2451 transition(itos, vtos);
2452
2453 // align r13/rsi
2454 __ lea(rbx, at_bcp(BytesPerInt));
2455 __ andptr(rbx, -BytesPerInt);
2456 // load lo & hi
2457 __ movl(rcx, Address(rbx, BytesPerInt));
2458 __ movl(rdx, Address(rbx, 2 * BytesPerInt));
2459 __ bswapl(rcx);
2460 __ bswapl(rdx);
2461 // check against lo & hi
2462 __ cmpl(rax, rcx);
2463 __ jcc(Assembler::less, default_case);
2464 __ cmpl(rax, rdx);
2465 __ jcc(Assembler::greater, default_case);
2466 // lookup dispatch offset
2467 __ subl(rax, rcx);
2468 __ movl(rdx, Address(rbx, rax, Address::times_4, 3 * BytesPerInt));
2469 __ profile_switch_case(rax, rbx, rcx);
2470 // continue execution
2471 __ bind(continue_execution);
2472 __ bswapl(rdx);
2473 LP64_ONLY(__ movl2ptr(rdx, rdx));
2474 __ load_unsigned_byte(rbx, Address(rbcp, rdx, Address::times_1));
2475 __ addptr(rbcp, rdx);
2476 __ dispatch_only(vtos, true);
2477 // handle default
2478 __ bind(default_case);
2479 __ profile_switch_default(rax);
2480 __ movl(rdx, Address(rbx, 0));
2481 __ jmp(continue_execution);
2482 }
2483
2484 void TemplateTable::lookupswitch() {
2485 transition(itos, itos);
2486 __ stop("lookupswitch bytecode should have been rewritten");
2487 }
2488
2489 void TemplateTable::fast_linearswitch() {
2490 transition(itos, vtos);
2491 Label loop_entry, loop, found, continue_execution;
2492 // bswap rax so we can avoid bswapping the table entries
2493 __ bswapl(rax);
2494 // align r13
2495 __ lea(rbx, at_bcp(BytesPerInt)); // btw: should be able to get rid of
2496 // this instruction (change offsets
2497 // below)
2498 __ andptr(rbx, -BytesPerInt);
2499 // set counter
2500 __ movl(rcx, Address(rbx, BytesPerInt));
2501 __ bswapl(rcx);
2502 __ jmpb(loop_entry);
2503 // table search
2504 __ bind(loop);
2505 __ cmpl(rax, Address(rbx, rcx, Address::times_8, 2 * BytesPerInt));
2506 __ jcc(Assembler::equal, found);
2507 __ bind(loop_entry);
2508 __ decrementl(rcx);
2509 __ jcc(Assembler::greaterEqual, loop);
2510 // default case
2511 __ profile_switch_default(rax);
2512 __ movl(rdx, Address(rbx, 0));
2513 __ jmp(continue_execution);
2514 // entry found -> get offset
2515 __ bind(found);
2516 __ movl(rdx, Address(rbx, rcx, Address::times_8, 3 * BytesPerInt));
2517 __ profile_switch_case(rcx, rax, rbx);
2518 // continue execution
2519 __ bind(continue_execution);
2520 __ bswapl(rdx);
2521 __ movl2ptr(rdx, rdx);
2522 __ load_unsigned_byte(rbx, Address(rbcp, rdx, Address::times_1));
2523 __ addptr(rbcp, rdx);
2524 __ dispatch_only(vtos, true);
2525 }
2526
2527 void TemplateTable::fast_binaryswitch() {
2528 transition(itos, vtos);
2529 // Implementation using the following core algorithm:
2530 //
2531 // int binary_search(int key, LookupswitchPair* array, int n) {
2532 // // Binary search according to "Methodik des Programmierens" by
2533 // // Edsger W. Dijkstra and W.H.J. Feijen, Addison Wesley Germany 1985.
2534 // int i = 0;
2535 // int j = n;
2536 // while (i+1 < j) {
2537 // // invariant P: 0 <= i < j <= n and (a[i] <= key < a[j] or Q)
2538 // // with Q: for all i: 0 <= i < n: key < a[i]
2539 // // where a stands for the array and assuming that the (inexisting)
2540 // // element a[n] is infinitely big.
2541 // int h = (i + j) >> 1;
2542 // // i < h < j
2543 // if (key < array[h].fast_match()) {
2544 // j = h;
2545 // } else {
2546 // i = h;
2547 // }
2548 // }
2549 // // R: a[i] <= key < a[i+1] or Q
2550 // // (i.e., if key is within array, i is the correct index)
2551 // return i;
2552 // }
2553
2554 // Register allocation
2555 const Register key = rax; // already set (tosca)
2556 const Register array = rbx;
2557 const Register i = rcx;
2558 const Register j = rdx;
2559 const Register h = rdi;
2560 const Register temp = rsi;
2561
2562 // Find array start
2563 NOT_LP64(__ save_bcp());
2564
2565 __ lea(array, at_bcp(3 * BytesPerInt)); // btw: should be able to
2566 // get rid of this
2567 // instruction (change
2568 // offsets below)
2569 __ andptr(array, -BytesPerInt);
2570
2571 // Initialize i & j
2572 __ xorl(i, i); // i = 0;
2573 __ movl(j, Address(array, -BytesPerInt)); // j = length(array);
2574
2575 // Convert j into native byteordering
2576 __ bswapl(j);
2577
2578 // And start
2579 Label entry;
2580 __ jmp(entry);
2581
2582 // binary search loop
2583 {
2584 Label loop;
2585 __ bind(loop);
2586 // int h = (i + j) >> 1;
2587 __ leal(h, Address(i, j, Address::times_1)); // h = i + j;
2588 __ sarl(h, 1); // h = (i + j) >> 1;
2589 // if (key < array[h].fast_match()) {
2590 // j = h;
2591 // } else {
2592 // i = h;
2593 // }
2594 // Convert array[h].match to native byte-ordering before compare
2595 __ movl(temp, Address(array, h, Address::times_8));
2596 __ bswapl(temp);
2597 __ cmpl(key, temp);
2598 // j = h if (key < array[h].fast_match())
2599 __ cmov32(Assembler::less, j, h);
2600 // i = h if (key >= array[h].fast_match())
2601 __ cmov32(Assembler::greaterEqual, i, h);
2602 // while (i+1 < j)
2603 __ bind(entry);
2604 __ leal(h, Address(i, 1)); // i+1
2605 __ cmpl(h, j); // i+1 < j
2606 __ jcc(Assembler::less, loop);
2607 }
2608
2609 // end of binary search, result index is i (must check again!)
2610 Label default_case;
2611 // Convert array[i].match to native byte-ordering before compare
2612 __ movl(temp, Address(array, i, Address::times_8));
2613 __ bswapl(temp);
2614 __ cmpl(key, temp);
2615 __ jcc(Assembler::notEqual, default_case);
2616
2617 // entry found -> j = offset
2618 __ movl(j , Address(array, i, Address::times_8, BytesPerInt));
2619 __ profile_switch_case(i, key, array);
2620 __ bswapl(j);
2621 LP64_ONLY(__ movslq(j, j));
2622
2623 NOT_LP64(__ restore_bcp());
2624 NOT_LP64(__ restore_locals()); // restore rdi
2625
2626 __ load_unsigned_byte(rbx, Address(rbcp, j, Address::times_1));
2627 __ addptr(rbcp, j);
2628 __ dispatch_only(vtos, true);
2629
2630 // default case -> j = default offset
2631 __ bind(default_case);
2632 __ profile_switch_default(i);
2633 __ movl(j, Address(array, -2 * BytesPerInt));
2634 __ bswapl(j);
2635 LP64_ONLY(__ movslq(j, j));
2636
2637 NOT_LP64(__ restore_bcp());
2638 NOT_LP64(__ restore_locals());
2639
2640 __ load_unsigned_byte(rbx, Address(rbcp, j, Address::times_1));
2641 __ addptr(rbcp, j);
2642 __ dispatch_only(vtos, true);
2643 }
2644
2645 void TemplateTable::_return(TosState state) {
2646 transition(state, state);
2647
2648 assert(_desc->calls_vm(),
2649 "inconsistent calls_vm information"); // call in remove_activation
2650
2651 if (_desc->bytecode() == Bytecodes::_return_register_finalizer) {
2652 assert(state == vtos, "only valid state");
2653 Register robj = LP64_ONLY(c_rarg1) NOT_LP64(rax);
2654 __ movptr(robj, aaddress(0));
2655 __ load_klass(rdi, robj);
2656 __ movl(rdi, Address(rdi, Klass::access_flags_offset()));
2657 __ testl(rdi, JVM_ACC_HAS_FINALIZER);
2658 Label skip_register_finalizer;
2659 __ jcc(Assembler::zero, skip_register_finalizer);
2660
2661 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::register_finalizer), robj);
2662
2663 __ bind(skip_register_finalizer);
2664 }
2665
2666 #ifdef _LP64
2667 if (SafepointMechanism::uses_thread_local_poll() && _desc->bytecode() != Bytecodes::_return_register_finalizer) {
2668 Label no_safepoint;
2669 NOT_PRODUCT(__ block_comment("Thread-local Safepoint poll"));
2670 __ testb(Address(r15_thread, Thread::polling_page_offset()), SafepointMechanism::poll_bit());
2671 __ jcc(Assembler::zero, no_safepoint);
2672 __ push(state);
2673 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
2674 InterpreterRuntime::at_safepoint));
2675 __ pop(state);
2676 __ bind(no_safepoint);
2677 }
2678 #endif
2679 if (state == qtos) {
2680 #ifndef _LP64
2681 ShouldNotReachHere();
2682 #else
2683 Label not_buffered;
2684 __ lea(r14, ExternalAddress(VTBuffer::_base));
2685 __ cmpptr(rax, r14);
2686 __ jcc(Assembler::below, not_buffered);
2687 __ lea(r14, ExternalAddress(VTBuffer::_end));
2688 __ cmpptr(rax, r14);
2689 __ jcc(Assembler::aboveEqual, not_buffered);
2690 if (ReturnValuesInThreadLocalBuffer) {
2691 __ movptr((Address(r15_thread, JavaThread::return_buffered_value_offset())), rax);
2692 } else {
2693 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::reallocate_value_in_heap), rax);
2694 __ get_vm_result(rax, r15_thread);
2695 }
2696 __ bind(not_buffered);
2697 #endif
2698 }
2699
2700 // Narrow result if state is itos but result type is smaller.
2701 // Need to narrow in the return bytecode rather than in generate_return_entry
2702 // since compiled code callers expect the result to already be narrowed.
2703 if (state == itos) {
2704 __ narrow(rax);
2705 }
2706
2707 #ifdef ASSERT
2708 if (EnableMVT || EnableValhalla) {
2709 if (state == atos) {
2710 const Register thread1 = NOT_LP64(rcx) LP64_ONLY(r15_thread);
2711 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::check_areturn), rax);
2712 NOT_LP64(__ get_thread(thread1));
2713 __ get_vm_result(rax, thread1);
2714 }
2715 }
2716 #endif // ASSERT
2717
2718 __ remove_activation(state, rbcp, true, true, true, state == qtos && ValueTypeReturnedAsFields);
2719
2720 __ jmp(rbcp);
2721 }
2722
2723 // ----------------------------------------------------------------------------
2724 // Volatile variables demand their effects be made known to all CPU's
2725 // in order. Store buffers on most chips allow reads & writes to
2726 // reorder; the JMM's ReadAfterWrite.java test fails in -Xint mode
2727 // without some kind of memory barrier (i.e., it's not sufficient that
2728 // the interpreter does not reorder volatile references, the hardware
2729 // also must not reorder them).
2730 //
2731 // According to the new Java Memory Model (JMM):
2732 // (1) All volatiles are serialized wrt to each other. ALSO reads &
2733 // writes act as aquire & release, so:
2734 // (2) A read cannot let unrelated NON-volatile memory refs that
2735 // happen after the read float up to before the read. It's OK for
2736 // non-volatile memory refs that happen before the volatile read to
2737 // float down below it.
2738 // (3) Similar a volatile write cannot let unrelated NON-volatile
2739 // memory refs that happen BEFORE the write float down to after the
2740 // write. It's OK for non-volatile memory refs that happen after the
2741 // volatile write to float up before it.
2742 //
2743 // We only put in barriers around volatile refs (they are expensive),
2744 // not _between_ memory refs (that would require us to track the
2745 // flavor of the previous memory refs). Requirements (2) and (3)
2746 // require some barriers before volatile stores and after volatile
2747 // loads. These nearly cover requirement (1) but miss the
2748 // volatile-store-volatile-load case. This final case is placed after
2749 // volatile-stores although it could just as well go before
2750 // volatile-loads.
2751
2752 void TemplateTable::volatile_barrier(Assembler::Membar_mask_bits order_constraint ) {
2753 // Helper function to insert a is-volatile test and memory barrier
2754 if(!os::is_MP()) return; // Not needed on single CPU
2755 __ membar(order_constraint);
2756 }
2757
2758 void TemplateTable::resolve_cache_and_index(int byte_no,
2759 Register Rcache,
2760 Register index,
2761 size_t index_size) {
2762 const Register temp = rbx;
2763 assert_different_registers(Rcache, index, temp);
2764
2765 Label resolved;
2766
2767 Bytecodes::Code code = bytecode();
2768 switch (code) {
2769 case Bytecodes::_nofast_getfield: code = Bytecodes::_getfield; break;
2770 case Bytecodes::_nofast_putfield: code = Bytecodes::_putfield; break;
2771 default: break;
2772 }
2773
2774 assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range");
2775 __ get_cache_and_index_and_bytecode_at_bcp(Rcache, index, temp, byte_no, 1, index_size);
2776 __ cmpl(temp, code); // have we resolved this bytecode?
2777 __ jcc(Assembler::equal, resolved);
2778
2779 // resolve first time through
2780 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_from_cache);
2781 __ movl(temp, code);
2782 __ call_VM(noreg, entry, temp);
2783 // Update registers with resolved info
2784 __ get_cache_and_index_at_bcp(Rcache, index, 1, index_size);
2785 __ bind(resolved);
2786 }
2787
2788 // The cache and index registers must be set before call
2789 void TemplateTable::load_field_cp_cache_entry(Register obj,
2790 Register cache,
2791 Register index,
2792 Register off,
2793 Register flags,
2794 bool is_static = false) {
2795 assert_different_registers(cache, index, flags, off);
2796
2797 ByteSize cp_base_offset = ConstantPoolCache::base_offset();
2798 // Field offset
2799 __ movptr(off, Address(cache, index, Address::times_ptr,
2800 in_bytes(cp_base_offset +
2801 ConstantPoolCacheEntry::f2_offset())));
2802 // Flags
2803 __ movl(flags, Address(cache, index, Address::times_ptr,
2804 in_bytes(cp_base_offset +
2805 ConstantPoolCacheEntry::flags_offset())));
2806
2807 // klass overwrite register
2808 if (is_static) {
2809 __ movptr(obj, Address(cache, index, Address::times_ptr,
2810 in_bytes(cp_base_offset +
2811 ConstantPoolCacheEntry::f1_offset())));
2812 const int mirror_offset = in_bytes(Klass::java_mirror_offset());
2813 __ movptr(obj, Address(obj, mirror_offset));
2814 __ resolve_oop_handle(obj);
2815 }
2816 }
2817
2818 void TemplateTable::load_invoke_cp_cache_entry(int byte_no,
2819 Register method,
2820 Register itable_index,
2821 Register flags,
2822 bool is_invokevirtual,
2823 bool is_invokevfinal, /*unused*/
2824 bool is_invokedynamic) {
2825 // setup registers
2826 const Register cache = rcx;
2827 const Register index = rdx;
2828 assert_different_registers(method, flags);
2829 assert_different_registers(method, cache, index);
2830 assert_different_registers(itable_index, flags);
2831 assert_different_registers(itable_index, cache, index);
2832 // determine constant pool cache field offsets
2833 assert(is_invokevirtual == (byte_no == f2_byte), "is_invokevirtual flag redundant");
2834 const int method_offset = in_bytes(
2835 ConstantPoolCache::base_offset() +
2836 ((byte_no == f2_byte)
2837 ? ConstantPoolCacheEntry::f2_offset()
2838 : ConstantPoolCacheEntry::f1_offset()));
2839 const int flags_offset = in_bytes(ConstantPoolCache::base_offset() +
2840 ConstantPoolCacheEntry::flags_offset());
2841 // access constant pool cache fields
2842 const int index_offset = in_bytes(ConstantPoolCache::base_offset() +
2843 ConstantPoolCacheEntry::f2_offset());
2844
2845 size_t index_size = (is_invokedynamic ? sizeof(u4) : sizeof(u2));
2846 resolve_cache_and_index(byte_no, cache, index, index_size);
2847 __ movptr(method, Address(cache, index, Address::times_ptr, method_offset));
2848
2849 if (itable_index != noreg) {
2850 // pick up itable or appendix index from f2 also:
2851 __ movptr(itable_index, Address(cache, index, Address::times_ptr, index_offset));
2852 }
2853 __ movl(flags, Address(cache, index, Address::times_ptr, flags_offset));
2854 }
2855
2856 // The registers cache and index expected to be set before call.
2857 // Correct values of the cache and index registers are preserved.
2858 void TemplateTable::jvmti_post_field_access(Register cache,
2859 Register index,
2860 bool is_static,
2861 bool has_tos) {
2862 if (JvmtiExport::can_post_field_access()) {
2863 // Check to see if a field access watch has been set before we take
2864 // the time to call into the VM.
2865 Label L1;
2866 assert_different_registers(cache, index, rax);
2867 __ mov32(rax, ExternalAddress((address) JvmtiExport::get_field_access_count_addr()));
2868 __ testl(rax,rax);
2869 __ jcc(Assembler::zero, L1);
2870
2871 // cache entry pointer
2872 __ addptr(cache, in_bytes(ConstantPoolCache::base_offset()));
2873 __ shll(index, LogBytesPerWord);
2874 __ addptr(cache, index);
2875 if (is_static) {
2876 __ xorptr(rax, rax); // NULL object reference
2877 } else {
2878 __ pop(atos); // Get the object
2879 __ verify_oop(rax);
2880 __ push(atos); // Restore stack state
2881 }
2882 // rax,: object pointer or NULL
2883 // cache: cache entry pointer
2884 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access),
2885 rax, cache);
2886 __ get_cache_and_index_at_bcp(cache, index, 1);
2887 __ bind(L1);
2888 }
2889 }
2890
2891 void TemplateTable::pop_and_check_object(Register r) {
2892 __ pop_ptr(r);
2893 __ null_check(r); // for field access must check obj.
2894 __ verify_oop(r);
2895 }
2896
2897 void TemplateTable::getfield_or_static(int byte_no, bool is_static, RewriteControl rc) {
2898 transition(vtos, vtos);
2899
2900 const Register cache = rcx;
2901 const Register index = rdx;
2902 const Register obj = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
2903 const Register off = rbx;
2904 const Register flags = rax;
2905 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // uses same reg as obj, so don't mix them
2906 const Register flags2 = rdx;
2907
2908 resolve_cache_and_index(byte_no, cache, index, sizeof(u2));
2909 jvmti_post_field_access(cache, index, is_static, false);
2910 load_field_cp_cache_entry(obj, cache, index, off, flags, is_static);
2911
2912 const Address field(obj, off, Address::times_1, 0*wordSize);
2913 NOT_LP64(const Address hi(obj, off, Address::times_1, 1*wordSize));
2914
2915 Label Done, notByte, notBool, notInt, notShort, notChar, notLong, notFloat, notObj, notValueType, notDouble;
2916
2917 if (!is_static) {
2918 __ movptr(rcx, Address(cache, index, Address::times_ptr,
2919 in_bytes(ConstantPoolCache::base_offset() +
2920 ConstantPoolCacheEntry::f1_offset())));
2921 }
2922
2923 __ movl(flags2, flags);
2924
2925 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift);
2926 // Make sure we don't need to mask edx after the above shift
2927 assert(btos == 0, "change code, btos != 0");
2928
2929 __ andl(flags, ConstantPoolCacheEntry::tos_state_mask);
2930
2931 __ jcc(Assembler::notZero, notByte);
2932 // btos
2933 if (!is_static) pop_and_check_object(obj);
2934 __ load_signed_byte(rax, field);
2935 __ push(btos);
2936 // Rewrite bytecode to be faster
2937 if (!is_static && rc == may_rewrite) {
2938 patch_bytecode(Bytecodes::_fast_bgetfield, bc, rbx);
2939 }
2940 __ jmp(Done);
2941
2942 __ bind(notByte);
2943
2944 __ cmpl(flags, qtos);
2945 __ jcc(Assembler::notEqual, notValueType);
2946 // qtos
2947 if (is_static) {
2948 Label initialized;
2949 // Issue below if the static field has not been initialized yet
2950 __ load_heap_oop(rax, field);
2951 __ testptr(rax, rax);
2952 __ jcc(Assembler::notZero, initialized);
2953 __ andl(flags2, ConstantPoolCacheEntry::field_index_mask);
2954 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::uninitialized_static_value_field),
2955 obj, flags2);
2956 __ verify_oop(rax);
2957 __ bind(initialized);
2958 __ push(qtos);
2959 } else {
2960 __ andl(flags2, ConstantPoolCacheEntry::field_index_mask);
2961 pop_and_check_object(rbx);
2962 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::qgetfield),
2963 rbx, flags2, rcx);
2964 __ verify_oop(rax);
2965 __ push(qtos);
2966 // Bytecode rewrite?
2967 }
2968 __ jmp(Done);
2969
2970 __ bind(notValueType);
2971
2972 if (!is_static) pop_and_check_object(obj);
2973
2974 __ cmpl(flags, ztos);
2975 __ jcc(Assembler::notEqual, notBool);
2976
2977 // ztos (same code as btos)
2978 __ load_signed_byte(rax, field);
2979 __ push(ztos);
2980 // Rewrite bytecode to be faster
2981 if (!is_static && rc == may_rewrite) {
2982 // use btos rewriting, no truncating to t/f bit is needed for getfield.
2983 patch_bytecode(Bytecodes::_fast_bgetfield, bc, rbx);
2984 }
2985 __ jmp(Done);
2986
2987 __ bind(notBool);
2988 __ cmpl(flags, atos);
2989 __ jcc(Assembler::notEqual, notObj);
2990 // atos
2991 __ load_heap_oop(rax, field);
2992 __ push(atos);
2993 if (!is_static && rc == may_rewrite) {
2994 patch_bytecode(Bytecodes::_fast_agetfield, bc, rbx);
2995 }
2996 __ jmp(Done);
2997
2998 __ bind(notObj);
2999 __ cmpl(flags, itos);
3000 __ jcc(Assembler::notEqual, notInt);
3001 // itos
3002 __ movl(rax, field);
3003 __ push(itos);
3004 // Rewrite bytecode to be faster
3005 if (!is_static && rc == may_rewrite) {
3006 patch_bytecode(Bytecodes::_fast_igetfield, bc, rbx);
3007 }
3008 __ jmp(Done);
3009
3010 __ bind(notInt);
3011 __ cmpl(flags, ctos);
3012 __ jcc(Assembler::notEqual, notChar);
3013 // ctos
3014 __ load_unsigned_short(rax, field);
3015 __ push(ctos);
3016 // Rewrite bytecode to be faster
3017 if (!is_static && rc == may_rewrite) {
3018 patch_bytecode(Bytecodes::_fast_cgetfield, bc, rbx);
3019 }
3020 __ jmp(Done);
3021
3022 __ bind(notChar);
3023 __ cmpl(flags, stos);
3024 __ jcc(Assembler::notEqual, notShort);
3025 // stos
3026 __ load_signed_short(rax, field);
3027 __ push(stos);
3028 // Rewrite bytecode to be faster
3029 if (!is_static && rc == may_rewrite) {
3030 patch_bytecode(Bytecodes::_fast_sgetfield, bc, rbx);
3031 }
3032 __ jmp(Done);
3033
3034 __ bind(notShort);
3035 __ cmpl(flags, ltos);
3036 __ jcc(Assembler::notEqual, notLong);
3037 // ltos
3038
3039 #ifndef _LP64
3040 // Generate code as if volatile. There just aren't enough registers to
3041 // save that information and this code is faster than the test.
3042 __ fild_d(field); // Must load atomically
3043 __ subptr(rsp,2*wordSize); // Make space for store
3044 __ fistp_d(Address(rsp,0));
3045 __ pop(rax);
3046 __ pop(rdx);
3047 #else
3048 __ movq(rax, field);
3049 #endif
3050
3051 __ push(ltos);
3052 // Rewrite bytecode to be faster
3053 LP64_ONLY(if (!is_static && rc == may_rewrite) patch_bytecode(Bytecodes::_fast_lgetfield, bc, rbx));
3054 __ jmp(Done);
3055
3056 __ bind(notLong);
3057 __ cmpl(flags, ftos);
3058 __ jcc(Assembler::notEqual, notFloat);
3059 // ftos
3060
3061 __ load_float(field);
3062 __ push(ftos);
3063 // Rewrite bytecode to be faster
3064 if (!is_static && rc == may_rewrite) {
3065 patch_bytecode(Bytecodes::_fast_fgetfield, bc, rbx);
3066 }
3067 __ jmp(Done);
3068
3069 __ bind(notFloat);
3070 #ifdef ASSERT
3071 __ cmpl(flags, dtos);
3072 __ jcc(Assembler::notEqual, notDouble);
3073 #endif
3074 // dtos
3075 __ load_double(field);
3076 __ push(dtos);
3077 // Rewrite bytecode to be faster
3078 if (!is_static && rc == may_rewrite) {
3079 patch_bytecode(Bytecodes::_fast_dgetfield, bc, rbx);
3080 }
3081 #ifdef ASSERT
3082 __ jmp(Done);
3083
3084
3085 __ bind(notDouble);
3086 __ stop("Bad state");
3087 #endif
3088
3089 __ bind(Done);
3090 // [jk] not needed currently
3091 // volatile_barrier(Assembler::Membar_mask_bits(Assembler::LoadLoad |
3092 // Assembler::LoadStore));
3093 }
3094
3095 void TemplateTable::getfield(int byte_no) {
3096 getfield_or_static(byte_no, false);
3097 }
3098
3099 void TemplateTable::nofast_getfield(int byte_no) {
3100 getfield_or_static(byte_no, false, may_not_rewrite);
3101 }
3102
3103 void TemplateTable::getstatic(int byte_no) {
3104 getfield_or_static(byte_no, true);
3105 }
3106
3107 void TemplateTable::vwithfield() {
3108 transition(vtos, qtos);
3109
3110 Register cache = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
3111 Register index = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
3112
3113 resolve_cache_and_index(f2_byte, cache, index, sizeof(u2));
3114
3115 call_VM(rbx, CAST_FROM_FN_PTR(address, InterpreterRuntime::vwithfield), cache);
3116 // new value type is returned in rbx
3117 // stack adjustement is returned in rax
3118 __ verify_oop(rbx);
3119 __ addptr(rsp, rax);
3120 __ movptr(rax, rbx);
3121 }
3122
3123 // The registers cache and index expected to be set before call.
3124 // The function may destroy various registers, just not the cache and index registers.
3125 void TemplateTable::jvmti_post_field_mod(Register cache, Register index, bool is_static) {
3126
3127 const Register robj = LP64_ONLY(c_rarg2) NOT_LP64(rax);
3128 const Register RBX = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
3129 const Register RCX = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
3130 const Register RDX = LP64_ONLY(rscratch1) NOT_LP64(rdx);
3131
3132 ByteSize cp_base_offset = ConstantPoolCache::base_offset();
3133
3134 if (JvmtiExport::can_post_field_modification()) {
3135 // Check to see if a field modification watch has been set before
3136 // we take the time to call into the VM.
3137 Label L1;
3138 assert_different_registers(cache, index, rax);
3139 __ mov32(rax, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr()));
3140 __ testl(rax, rax);
3141 __ jcc(Assembler::zero, L1);
3142
3143 __ get_cache_and_index_at_bcp(robj, RDX, 1);
3144
3145
3146 if (is_static) {
3147 // Life is simple. Null out the object pointer.
3148 __ xorl(RBX, RBX);
3149
3150 } else {
3151 // Life is harder. The stack holds the value on top, followed by
3152 // the object. We don't know the size of the value, though; it
3153 // could be one or two words depending on its type. As a result,
3154 // we must find the type to determine where the object is.
3155 #ifndef _LP64
3156 Label two_word, valsize_known;
3157 #endif
3158 __ movl(RCX, Address(robj, RDX,
3159 Address::times_ptr,
3160 in_bytes(cp_base_offset +
3161 ConstantPoolCacheEntry::flags_offset())));
3162 NOT_LP64(__ mov(rbx, rsp));
3163 __ shrl(RCX, ConstantPoolCacheEntry::tos_state_shift);
3164
3165 // Make sure we don't need to mask rcx after the above shift
3166 ConstantPoolCacheEntry::verify_tos_state_shift();
3167 #ifdef _LP64
3168 __ movptr(c_rarg1, at_tos_p1()); // initially assume a one word jvalue
3169 __ cmpl(c_rarg3, ltos);
3170 __ cmovptr(Assembler::equal,
3171 c_rarg1, at_tos_p2()); // ltos (two word jvalue)
3172 __ cmpl(c_rarg3, dtos);
3173 __ cmovptr(Assembler::equal,
3174 c_rarg1, at_tos_p2()); // dtos (two word jvalue)
3175 #else
3176 __ cmpl(rcx, ltos);
3177 __ jccb(Assembler::equal, two_word);
3178 __ cmpl(rcx, dtos);
3179 __ jccb(Assembler::equal, two_word);
3180 __ addptr(rbx, Interpreter::expr_offset_in_bytes(1)); // one word jvalue (not ltos, dtos)
3181 __ jmpb(valsize_known);
3182
3183 __ bind(two_word);
3184 __ addptr(rbx, Interpreter::expr_offset_in_bytes(2)); // two words jvalue
3185
3186 __ bind(valsize_known);
3187 // setup object pointer
3188 __ movptr(rbx, Address(rbx, 0));
3189 #endif
3190 }
3191 // cache entry pointer
3192 __ addptr(robj, in_bytes(cp_base_offset));
3193 __ shll(RDX, LogBytesPerWord);
3194 __ addptr(robj, RDX);
3195 // object (tos)
3196 __ mov(RCX, rsp);
3197 // c_rarg1: object pointer set up above (NULL if static)
3198 // c_rarg2: cache entry pointer
3199 // c_rarg3: jvalue object on the stack
3200 __ call_VM(noreg,
3201 CAST_FROM_FN_PTR(address,
3202 InterpreterRuntime::post_field_modification),
3203 RBX, robj, RCX);
3204 __ get_cache_and_index_at_bcp(cache, index, 1);
3205 __ bind(L1);
3206 }
3207 }
3208
3209 void TemplateTable::putfield_or_static(int byte_no, bool is_static, RewriteControl rc) {
3210 transition(vtos, vtos);
3211
3212 const Register cache = rcx;
3213 const Register index = rdx;
3214 const Register obj = rcx;
3215 const Register off = rbx;
3216 const Register flags = rax;
3217 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
3218 const Register flags2 = rdx;
3219
3220 resolve_cache_and_index(byte_no, cache, index, sizeof(u2));
3221 jvmti_post_field_mod(cache, index, is_static);
3222 load_field_cp_cache_entry(obj, cache, index, off, flags, is_static);
3223
3224 // [jk] not needed currently
3225 // volatile_barrier(Assembler::Membar_mask_bits(Assembler::LoadStore |
3226 // Assembler::StoreStore));
3227
3228 Label notVolatile, Done;
3229
3230 __ movl(flags2, flags);
3231
3232 // field addresses
3233 const Address field(obj, off, Address::times_1, 0*wordSize);
3234 NOT_LP64( const Address hi(obj, off, Address::times_1, 1*wordSize);)
3235
3236 Label notByte, notBool, notInt, notShort, notChar,
3237 notLong, notFloat, notObj, notValueType, notDouble;
3238
3239 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift);
3240
3241 assert(btos == 0, "change code, btos != 0");
3242 __ andl(flags, ConstantPoolCacheEntry::tos_state_mask);
3243 __ jcc(Assembler::notZero, notByte);
3244
3245 // btos
3246 {
3247 __ pop(btos);
3248 if (!is_static) pop_and_check_object(obj);
3249 __ movb(field, rax);
3250 if (!is_static && rc == may_rewrite) {
3251 patch_bytecode(Bytecodes::_fast_bputfield, bc, rbx, true, byte_no);
3252 }
3253 __ jmp(Done);
3254 }
3255
3256 __ bind(notByte);
3257 __ cmpl(flags, ztos);
3258 __ jcc(Assembler::notEqual, notBool);
3259
3260 // ztos
3261 {
3262 __ pop(ztos);
3263 if (!is_static) pop_and_check_object(obj);
3264 __ andl(rax, 0x1);
3265 __ movb(field, rax);
3266 if (!is_static && rc == may_rewrite) {
3267 patch_bytecode(Bytecodes::_fast_zputfield, bc, rbx, true, byte_no);
3268 }
3269 __ jmp(Done);
3270 }
3271
3272 __ bind(notBool);
3273 __ cmpl(flags, atos);
3274 __ jcc(Assembler::notEqual, notObj);
3275
3276 // atos
3277 {
3278 __ pop(atos);
3279 if (!is_static) pop_and_check_object(obj);
3280 // Store into the field
3281 do_oop_store(_masm, field, rax, _bs->kind(), false);
3282 if (!is_static && rc == may_rewrite) {
3283 patch_bytecode(Bytecodes::_fast_aputfield, bc, rbx, true, byte_no);
3284 }
3285 __ jmp(Done);
3286 }
3287
3288 __ bind(notObj);
3289 __ cmpl(flags, qtos);
3290 __ jcc(Assembler::notEqual, notValueType);
3291
3292 // qtos
3293 {
3294 __ pop(qtos); // => rax == value
3295 if (!is_static) {
3296 // value types in non-static fields are embedded
3297 pop_and_check_object(rbx);
3298 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::qputfield),
3299 rbx, rax, rcx);
3300 __ jmp(notVolatile); // value types are never volatile
3301 } else {
3302 // Store into the static field
3303 // Value types in static fields are currently handled with indirection
3304 // but a copy to the Java heap might be required if the value is currently
3305 // stored in a thread local buffer
3306 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::qputstatic), rax, off, obj);
3307 }
3308 __ jmp(Done);
3309 }
3310
3311 __ bind(notValueType);
3312 __ cmpl(flags, itos);
3313 __ jcc(Assembler::notEqual, notInt);
3314
3315 // itos
3316 {
3317 __ pop(itos);
3318 if (!is_static) pop_and_check_object(obj);
3319 __ movl(field, rax);
3320 if (!is_static && rc == may_rewrite) {
3321 patch_bytecode(Bytecodes::_fast_iputfield, bc, rbx, true, byte_no);
3322 }
3323 __ jmp(Done);
3324 }
3325
3326 __ bind(notInt);
3327 __ cmpl(flags, ctos);
3328 __ jcc(Assembler::notEqual, notChar);
3329
3330 // ctos
3331 {
3332 __ pop(ctos);
3333 if (!is_static) pop_and_check_object(obj);
3334 __ movw(field, rax);
3335 if (!is_static && rc == may_rewrite) {
3336 patch_bytecode(Bytecodes::_fast_cputfield, bc, rbx, true, byte_no);
3337 }
3338 __ jmp(Done);
3339 }
3340
3341 __ bind(notChar);
3342 __ cmpl(flags, stos);
3343 __ jcc(Assembler::notEqual, notShort);
3344
3345 // stos
3346 {
3347 __ pop(stos);
3348 if (!is_static) pop_and_check_object(obj);
3349 __ movw(field, rax);
3350 if (!is_static && rc == may_rewrite) {
3351 patch_bytecode(Bytecodes::_fast_sputfield, bc, rbx, true, byte_no);
3352 }
3353 __ jmp(Done);
3354 }
3355
3356 __ bind(notShort);
3357 __ cmpl(flags, ltos);
3358 __ jcc(Assembler::notEqual, notLong);
3359
3360 // ltos
3361 #ifdef _LP64
3362 {
3363 __ pop(ltos);
3364 if (!is_static) pop_and_check_object(obj);
3365 __ movq(field, rax);
3366 if (!is_static && rc == may_rewrite) {
3367 patch_bytecode(Bytecodes::_fast_lputfield, bc, rbx, true, byte_no);
3368 }
3369 __ jmp(Done);
3370 }
3371 #else
3372 {
3373 Label notVolatileLong;
3374 __ testl(rdx, rdx);
3375 __ jcc(Assembler::zero, notVolatileLong);
3376
3377 __ pop(ltos); // overwrites rdx, do this after testing volatile.
3378 if (!is_static) pop_and_check_object(obj);
3379
3380 // Replace with real volatile test
3381 __ push(rdx);
3382 __ push(rax); // Must update atomically with FIST
3383 __ fild_d(Address(rsp,0)); // So load into FPU register
3384 __ fistp_d(field); // and put into memory atomically
3385 __ addptr(rsp, 2*wordSize);
3386 // volatile_barrier();
3387 volatile_barrier(Assembler::Membar_mask_bits(Assembler::StoreLoad |
3388 Assembler::StoreStore));
3389 // Don't rewrite volatile version
3390 __ jmp(notVolatile);
3391
3392 __ bind(notVolatileLong);
3393
3394 __ pop(ltos); // overwrites rdx
3395 if (!is_static) pop_and_check_object(obj);
3396 __ movptr(hi, rdx);
3397 __ movptr(field, rax);
3398 // Don't rewrite to _fast_lputfield for potential volatile case.
3399 __ jmp(notVolatile);
3400 }
3401 #endif // _LP64
3402
3403 __ bind(notLong);
3404 __ cmpl(flags, ftos);
3405 __ jcc(Assembler::notEqual, notFloat);
3406
3407 // ftos
3408 {
3409 __ pop(ftos);
3410 if (!is_static) pop_and_check_object(obj);
3411 __ store_float(field);
3412 if (!is_static && rc == may_rewrite) {
3413 patch_bytecode(Bytecodes::_fast_fputfield, bc, rbx, true, byte_no);
3414 }
3415 __ jmp(Done);
3416 }
3417
3418 __ bind(notFloat);
3419 #ifdef ASSERT
3420 __ cmpl(flags, dtos);
3421 __ jcc(Assembler::notEqual, notDouble);
3422 #endif
3423
3424 // dtos
3425 {
3426 __ pop(dtos);
3427 if (!is_static) pop_and_check_object(obj);
3428 __ store_double(field);
3429 if (!is_static && rc == may_rewrite) {
3430 patch_bytecode(Bytecodes::_fast_dputfield, bc, rbx, true, byte_no);
3431 }
3432 }
3433
3434 #ifdef ASSERT
3435 __ jmp(Done);
3436
3437 __ bind(notDouble);
3438 __ stop("Bad state");
3439 #endif
3440
3441 __ bind(Done);
3442
3443 __ shrl(flags2, ConstantPoolCacheEntry::is_volatile_shift);
3444 __ andl(flags2, 0x1);
3445
3446 // Check for volatile store
3447 __ testl(flags2, flags2);
3448 __ jcc(Assembler::zero, notVolatile);
3449 volatile_barrier(Assembler::Membar_mask_bits(Assembler::StoreLoad |
3450 Assembler::StoreStore));
3451 __ bind(notVolatile);
3452 }
3453
3454 void TemplateTable::putfield(int byte_no) {
3455 putfield_or_static(byte_no, false);
3456 }
3457
3458 void TemplateTable::nofast_putfield(int byte_no) {
3459 putfield_or_static(byte_no, false, may_not_rewrite);
3460 }
3461
3462 void TemplateTable::putstatic(int byte_no) {
3463 putfield_or_static(byte_no, true);
3464 }
3465
3466 void TemplateTable::jvmti_post_fast_field_mod() {
3467
3468 const Register scratch = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
3469
3470 if (JvmtiExport::can_post_field_modification()) {
3471 // Check to see if a field modification watch has been set before
3472 // we take the time to call into the VM.
3473 Label L2;
3474 __ mov32(scratch, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr()));
3475 __ testl(scratch, scratch);
3476 __ jcc(Assembler::zero, L2);
3477 __ pop_ptr(rbx); // copy the object pointer from tos
3478 __ verify_oop(rbx);
3479 __ push_ptr(rbx); // put the object pointer back on tos
3480 // Save tos values before call_VM() clobbers them. Since we have
3481 // to do it for every data type, we use the saved values as the
3482 // jvalue object.
3483 switch (bytecode()) { // load values into the jvalue object
3484 case Bytecodes::_fast_qputfield: //fall through
3485 case Bytecodes::_fast_aputfield: __ push_ptr(rax); break;
3486 case Bytecodes::_fast_bputfield: // fall through
3487 case Bytecodes::_fast_zputfield: // fall through
3488 case Bytecodes::_fast_sputfield: // fall through
3489 case Bytecodes::_fast_cputfield: // fall through
3490 case Bytecodes::_fast_iputfield: __ push_i(rax); break;
3491 case Bytecodes::_fast_dputfield: __ push(dtos); break;
3492 case Bytecodes::_fast_fputfield: __ push(ftos); break;
3493 case Bytecodes::_fast_lputfield: __ push_l(rax); break;
3494
3495 default:
3496 ShouldNotReachHere();
3497 }
3498 __ mov(scratch, rsp); // points to jvalue on the stack
3499 // access constant pool cache entry
3500 LP64_ONLY(__ get_cache_entry_pointer_at_bcp(c_rarg2, rax, 1));
3501 NOT_LP64(__ get_cache_entry_pointer_at_bcp(rax, rdx, 1));
3502 __ verify_oop(rbx);
3503 // rbx: object pointer copied above
3504 // c_rarg2: cache entry pointer
3505 // c_rarg3: jvalue object on the stack
3506 LP64_ONLY(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_modification), rbx, c_rarg2, c_rarg3));
3507 NOT_LP64(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_modification), rbx, rax, rcx));
3508
3509 switch (bytecode()) { // restore tos values
3510 case Bytecodes::_fast_qputfield: // fall through
3511 case Bytecodes::_fast_aputfield: __ pop_ptr(rax); break;
3512 case Bytecodes::_fast_bputfield: // fall through
3513 case Bytecodes::_fast_zputfield: // fall through
3514 case Bytecodes::_fast_sputfield: // fall through
3515 case Bytecodes::_fast_cputfield: // fall through
3516 case Bytecodes::_fast_iputfield: __ pop_i(rax); break;
3517 case Bytecodes::_fast_dputfield: __ pop(dtos); break;
3518 case Bytecodes::_fast_fputfield: __ pop(ftos); break;
3519 case Bytecodes::_fast_lputfield: __ pop_l(rax); break;
3520 default: break;
3521 }
3522 __ bind(L2);
3523 }
3524 }
3525
3526 void TemplateTable::fast_storefield(TosState state) {
3527 transition(state, vtos);
3528
3529 ByteSize base = ConstantPoolCache::base_offset();
3530
3531 jvmti_post_fast_field_mod();
3532
3533 // access constant pool cache
3534 __ get_cache_and_index_at_bcp(rcx, rbx, 1);
3535
3536 // test for volatile with rdx but rdx is tos register for lputfield.
3537 __ movl(rdx, Address(rcx, rbx, Address::times_ptr,
3538 in_bytes(base +
3539 ConstantPoolCacheEntry::flags_offset())));
3540
3541 // replace index with field offset from cache entry
3542 __ movptr(rbx, Address(rcx, rbx, Address::times_ptr,
3543 in_bytes(base + ConstantPoolCacheEntry::f2_offset())));
3544
3545 // [jk] not needed currently
3546 // volatile_barrier(Assembler::Membar_mask_bits(Assembler::LoadStore |
3547 // Assembler::StoreStore));
3548
3549 Label notVolatile;
3550 __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift);
3551 __ andl(rdx, 0x1);
3552
3553 // Get object from stack
3554 pop_and_check_object(rcx);
3555
3556 // field address
3557 const Address field(rcx, rbx, Address::times_1);
3558
3559 // access field
3560 switch (bytecode()) {
3561 case Bytecodes::_fast_qputfield:
3562 __ stop("should not be rewritten yet");
3563 break;
3564 case Bytecodes::_fast_aputfield:
3565 do_oop_store(_masm, field, rax, _bs->kind(), false);
3566 break;
3567 case Bytecodes::_fast_lputfield:
3568 #ifdef _LP64
3569 __ movq(field, rax);
3570 #else
3571 __ stop("should not be rewritten");
3572 #endif
3573 break;
3574 case Bytecodes::_fast_iputfield:
3575 __ movl(field, rax);
3576 break;
3577 case Bytecodes::_fast_zputfield:
3578 __ andl(rax, 0x1); // boolean is true if LSB is 1
3579 // fall through to bputfield
3580 case Bytecodes::_fast_bputfield:
3581 __ movb(field, rax);
3582 break;
3583 case Bytecodes::_fast_sputfield:
3584 // fall through
3585 case Bytecodes::_fast_cputfield:
3586 __ movw(field, rax);
3587 break;
3588 case Bytecodes::_fast_fputfield:
3589 __ store_float(field);
3590 break;
3591 case Bytecodes::_fast_dputfield:
3592 __ store_double(field);
3593 break;
3594 default:
3595 ShouldNotReachHere();
3596 }
3597
3598 // Check for volatile store
3599 __ testl(rdx, rdx);
3600 __ jcc(Assembler::zero, notVolatile);
3601 volatile_barrier(Assembler::Membar_mask_bits(Assembler::StoreLoad |
3602 Assembler::StoreStore));
3603 __ bind(notVolatile);
3604 }
3605
3606 void TemplateTable::fast_accessfield(TosState state) {
3607 transition(atos, state);
3608
3609 // Do the JVMTI work here to avoid disturbing the register state below
3610 if (JvmtiExport::can_post_field_access()) {
3611 // Check to see if a field access watch has been set before we
3612 // take the time to call into the VM.
3613 Label L1;
3614 __ mov32(rcx, ExternalAddress((address) JvmtiExport::get_field_access_count_addr()));
3615 __ testl(rcx, rcx);
3616 __ jcc(Assembler::zero, L1);
3617 // access constant pool cache entry
3618 LP64_ONLY(__ get_cache_entry_pointer_at_bcp(c_rarg2, rcx, 1));
3619 NOT_LP64(__ get_cache_entry_pointer_at_bcp(rcx, rdx, 1));
3620 __ verify_oop(rax);
3621 __ push_ptr(rax); // save object pointer before call_VM() clobbers it
3622 LP64_ONLY(__ mov(c_rarg1, rax));
3623 // c_rarg1: object pointer copied above
3624 // c_rarg2: cache entry pointer
3625 LP64_ONLY(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access), c_rarg1, c_rarg2));
3626 NOT_LP64(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access), rax, rcx));
3627 __ pop_ptr(rax); // restore object pointer
3628 __ bind(L1);
3629 }
3630
3631 // access constant pool cache
3632 __ get_cache_and_index_at_bcp(rcx, rbx, 1);
3633 // replace index with field offset from cache entry
3634 // [jk] not needed currently
3635 // if (os::is_MP()) {
3636 // __ movl(rdx, Address(rcx, rbx, Address::times_8,
3637 // in_bytes(ConstantPoolCache::base_offset() +
3638 // ConstantPoolCacheEntry::flags_offset())));
3639 // __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift);
3640 // __ andl(rdx, 0x1);
3641 // }
3642 __ movptr(rbx, Address(rcx, rbx, Address::times_ptr,
3643 in_bytes(ConstantPoolCache::base_offset() +
3644 ConstantPoolCacheEntry::f2_offset())));
3645
3646 // rax: object
3647 __ verify_oop(rax);
3648 __ null_check(rax);
3649 Address field(rax, rbx, Address::times_1);
3650
3651 // access field
3652 switch (bytecode()) {
3653 case Bytecodes::_fast_qgetfield:
3654 __ stop("should not be rewritten yet");
3655 break;
3656 case Bytecodes::_fast_agetfield:
3657 __ load_heap_oop(rax, field);
3658 __ verify_oop(rax);
3659 break;
3660 case Bytecodes::_fast_lgetfield:
3661 #ifdef _LP64
3662 __ movq(rax, field);
3663 #else
3664 __ stop("should not be rewritten");
3665 #endif
3666 break;
3667 case Bytecodes::_fast_igetfield:
3668 __ movl(rax, field);
3669 break;
3670 case Bytecodes::_fast_bgetfield:
3671 __ movsbl(rax, field);
3672 break;
3673 case Bytecodes::_fast_sgetfield:
3674 __ load_signed_short(rax, field);
3675 break;
3676 case Bytecodes::_fast_cgetfield:
3677 __ load_unsigned_short(rax, field);
3678 break;
3679 case Bytecodes::_fast_fgetfield:
3680 __ load_float(field);
3681 break;
3682 case Bytecodes::_fast_dgetfield:
3683 __ load_double(field);
3684 break;
3685 default:
3686 ShouldNotReachHere();
3687 }
3688 // [jk] not needed currently
3689 // if (os::is_MP()) {
3690 // Label notVolatile;
3691 // __ testl(rdx, rdx);
3692 // __ jcc(Assembler::zero, notVolatile);
3693 // __ membar(Assembler::LoadLoad);
3694 // __ bind(notVolatile);
3695 //};
3696 }
3697
3698 void TemplateTable::fast_xaccess(TosState state) {
3699 transition(vtos, state);
3700
3701 // get receiver
3702 __ movptr(rax, aaddress(0));
3703 // access constant pool cache
3704 __ get_cache_and_index_at_bcp(rcx, rdx, 2);
3705 __ movptr(rbx,
3706 Address(rcx, rdx, Address::times_ptr,
3707 in_bytes(ConstantPoolCache::base_offset() +
3708 ConstantPoolCacheEntry::f2_offset())));
3709 // make sure exception is reported in correct bcp range (getfield is
3710 // next instruction)
3711 __ increment(rbcp);
3712 __ null_check(rax);
3713 const Address field = Address(rax, rbx, Address::times_1, 0*wordSize);
3714 switch (state) {
3715 case itos:
3716 __ movl(rax, field);
3717 break;
3718 case atos:
3719 __ load_heap_oop(rax, field);
3720 __ verify_oop(rax);
3721 break;
3722 case ftos:
3723 __ load_float(field);
3724 break;
3725 default:
3726 ShouldNotReachHere();
3727 }
3728
3729 // [jk] not needed currently
3730 // if (os::is_MP()) {
3731 // Label notVolatile;
3732 // __ movl(rdx, Address(rcx, rdx, Address::times_8,
3733 // in_bytes(ConstantPoolCache::base_offset() +
3734 // ConstantPoolCacheEntry::flags_offset())));
3735 // __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift);
3736 // __ testl(rdx, 0x1);
3737 // __ jcc(Assembler::zero, notVolatile);
3738 // __ membar(Assembler::LoadLoad);
3739 // __ bind(notVolatile);
3740 // }
3741
3742 __ decrement(rbcp);
3743 }
3744
3745 //-----------------------------------------------------------------------------
3746 // Calls
3747
3748 void TemplateTable::count_calls(Register method, Register temp) {
3749 // implemented elsewhere
3750 ShouldNotReachHere();
3751 }
3752
3753 void TemplateTable::prepare_invoke(int byte_no,
3754 Register method, // linked method (or i-klass)
3755 Register index, // itable index, MethodType, etc.
3756 Register recv, // if caller wants to see it
3757 Register flags // if caller wants to test it
3758 ) {
3759 // determine flags
3760 const Bytecodes::Code code = bytecode();
3761 const bool is_invokeinterface = code == Bytecodes::_invokeinterface;
3762 const bool is_invokedynamic = code == Bytecodes::_invokedynamic;
3763 const bool is_invokehandle = code == Bytecodes::_invokehandle;
3764 const bool is_invokevirtual = code == Bytecodes::_invokevirtual;
3765 const bool is_invokespecial = code == Bytecodes::_invokespecial;
3766 const bool load_receiver = (recv != noreg);
3767 const bool save_flags = (flags != noreg);
3768 assert(load_receiver == (code != Bytecodes::_invokestatic && code != Bytecodes::_invokedynamic), "");
3769 assert(save_flags == (is_invokeinterface || is_invokevirtual), "need flags for vfinal");
3770 assert(flags == noreg || flags == rdx, "");
3771 assert(recv == noreg || recv == rcx, "");
3772
3773 // setup registers & access constant pool cache
3774 if (recv == noreg) recv = rcx;
3775 if (flags == noreg) flags = rdx;
3776 assert_different_registers(method, index, recv, flags);
3777
3778 // save 'interpreter return address'
3779 __ save_bcp();
3780
3781 load_invoke_cp_cache_entry(byte_no, method, index, flags, is_invokevirtual, false, is_invokedynamic);
3782
3783 // maybe push appendix to arguments (just before return address)
3784 if (is_invokedynamic || is_invokehandle) {
3785 Label L_no_push;
3786 __ testl(flags, (1 << ConstantPoolCacheEntry::has_appendix_shift));
3787 __ jcc(Assembler::zero, L_no_push);
3788 // Push the appendix as a trailing parameter.
3789 // This must be done before we get the receiver,
3790 // since the parameter_size includes it.
3791 __ push(rbx);
3792 __ mov(rbx, index);
3793 assert(ConstantPoolCacheEntry::_indy_resolved_references_appendix_offset == 0, "appendix expected at index+0");
3794 __ load_resolved_reference_at_index(index, rbx);
3795 __ pop(rbx);
3796 __ push(index); // push appendix (MethodType, CallSite, etc.)
3797 __ bind(L_no_push);
3798 }
3799
3800 // load receiver if needed (after appendix is pushed so parameter size is correct)
3801 // Note: no return address pushed yet
3802 if (load_receiver) {
3803 __ movl(recv, flags);
3804 __ andl(recv, ConstantPoolCacheEntry::parameter_size_mask);
3805 const int no_return_pc_pushed_yet = -1; // argument slot correction before we push return address
3806 const int receiver_is_at_end = -1; // back off one slot to get receiver
3807 Address recv_addr = __ argument_address(recv, no_return_pc_pushed_yet + receiver_is_at_end);
3808 __ movptr(recv, recv_addr);
3809 __ verify_oop(recv);
3810 }
3811
3812 if (save_flags) {
3813 __ movl(rbcp, flags);
3814 }
3815
3816 // compute return type
3817 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift);
3818 // Make sure we don't need to mask flags after the above shift
3819 ConstantPoolCacheEntry::verify_tos_state_shift();
3820 // load return address
3821 {
3822 const address table_addr = (address) Interpreter::invoke_return_entry_table_for(code);
3823 ExternalAddress table(table_addr);
3824 LP64_ONLY(__ lea(rscratch1, table));
3825 LP64_ONLY(__ movptr(flags, Address(rscratch1, flags, Address::times_ptr)));
3826 NOT_LP64(__ movptr(flags, ArrayAddress(table, Address(noreg, flags, Address::times_ptr))));
3827 }
3828
3829 // push return address
3830 __ push(flags);
3831
3832 // Restore flags value from the constant pool cache, and restore rsi
3833 // for later null checks. r13 is the bytecode pointer
3834 if (save_flags) {
3835 __ movl(flags, rbcp);
3836 __ restore_bcp();
3837 }
3838 }
3839
3840 void TemplateTable::invokevirtual_helper(Register index,
3841 Register recv,
3842 Register flags) {
3843 // Uses temporary registers rax, rdx
3844 assert_different_registers(index, recv, rax, rdx);
3845 assert(index == rbx, "");
3846 assert(recv == rcx, "");
3847
3848 // Test for an invoke of a final method
3849 Label notFinal;
3850 __ movl(rax, flags);
3851 __ andl(rax, (1 << ConstantPoolCacheEntry::is_vfinal_shift));
3852 __ jcc(Assembler::zero, notFinal);
3853
3854 const Register method = index; // method must be rbx
3855 assert(method == rbx,
3856 "Method* must be rbx for interpreter calling convention");
3857
3858 // do the call - the index is actually the method to call
3859 // that is, f2 is a vtable index if !is_vfinal, else f2 is a Method*
3860
3861 // It's final, need a null check here!
3862 __ null_check(recv);
3863
3864 // profile this call
3865 __ profile_final_call(rax);
3866 __ profile_arguments_type(rax, method, rbcp, true);
3867
3868 __ jump_from_interpreted(method, rax);
3869
3870 __ bind(notFinal);
3871
3872 // get receiver klass
3873 __ null_check(recv, oopDesc::klass_offset_in_bytes());
3874 __ load_klass(rax, recv);
3875
3876 // profile this call
3877 __ profile_virtual_call(rax, rlocals, rdx);
3878 // get target Method* & entry point
3879 __ lookup_virtual_method(rax, index, method);
3880 __ profile_called_method(method, rdx, rbcp);
3881
3882 __ profile_arguments_type(rdx, method, rbcp, true);
3883 __ jump_from_interpreted(method, rdx);
3884 }
3885
3886 void TemplateTable::invokevirtual(int byte_no) {
3887 transition(vtos, vtos);
3888 assert(byte_no == f2_byte, "use this argument");
3889 prepare_invoke(byte_no,
3890 rbx, // method or vtable index
3891 noreg, // unused itable index
3892 rcx, rdx); // recv, flags
3893
3894 // rbx: index
3895 // rcx: receiver
3896 // rdx: flags
3897
3898 invokevirtual_helper(rbx, rcx, rdx);
3899 }
3900
3901 void TemplateTable::invokespecial(int byte_no) {
3902 transition(vtos, vtos);
3903 assert(byte_no == f1_byte, "use this argument");
3904 prepare_invoke(byte_no, rbx, noreg, // get f1 Method*
3905 rcx); // get receiver also for null check
3906 __ verify_oop(rcx);
3907 __ null_check(rcx);
3908 // do the call
3909 __ profile_call(rax);
3910 __ profile_arguments_type(rax, rbx, rbcp, false);
3911 __ jump_from_interpreted(rbx, rax);
3912 }
3913
3914 void TemplateTable::invokestatic(int byte_no) {
3915 transition(vtos, vtos);
3916 assert(byte_no == f1_byte, "use this argument");
3917 prepare_invoke(byte_no, rbx); // get f1 Method*
3918 // do the call
3919 __ profile_call(rax);
3920 __ profile_arguments_type(rax, rbx, rbcp, false);
3921 __ jump_from_interpreted(rbx, rax);
3922 }
3923
3924
3925 void TemplateTable::fast_invokevfinal(int byte_no) {
3926 transition(vtos, vtos);
3927 assert(byte_no == f2_byte, "use this argument");
3928 __ stop("fast_invokevfinal not used on x86");
3929 }
3930
3931
3932 void TemplateTable::invokeinterface(int byte_no) {
3933 transition(vtos, vtos);
3934 assert(byte_no == f1_byte, "use this argument");
3935 prepare_invoke(byte_no, rax, rbx, // get f1 Klass*, f2 itable index
3936 rcx, rdx); // recv, flags
3937
3938 // rax: interface klass (from f1)
3939 // rbx: itable index (from f2)
3940 // rcx: receiver
3941 // rdx: flags
3942
3943 // Special case of invokeinterface called for virtual method of
3944 // java.lang.Object. See cpCacheOop.cpp for details.
3945 // This code isn't produced by javac, but could be produced by
3946 // another compliant java compiler.
3947 Label notMethod;
3948 __ movl(rlocals, rdx);
3949 __ andl(rlocals, (1 << ConstantPoolCacheEntry::is_forced_virtual_shift));
3950
3951 __ jcc(Assembler::zero, notMethod);
3952
3953 invokevirtual_helper(rbx, rcx, rdx);
3954 __ bind(notMethod);
3955
3956 // Get receiver klass into rdx - also a null check
3957 __ restore_locals(); // restore r14
3958 __ null_check(rcx, oopDesc::klass_offset_in_bytes());
3959 __ load_klass(rdx, rcx);
3960
3961 // profile this call
3962 __ profile_virtual_call(rdx, rbcp, rlocals);
3963
3964 Label no_such_interface, no_such_method;
3965
3966 __ lookup_interface_method(// inputs: rec. class, interface, itable index
3967 rdx, rax, rbx,
3968 // outputs: method, scan temp. reg
3969 rbx, rbcp,
3970 no_such_interface);
3971
3972 // rbx: Method* to call
3973 // rcx: receiver
3974 // Check for abstract method error
3975 // Note: This should be done more efficiently via a throw_abstract_method_error
3976 // interpreter entry point and a conditional jump to it in case of a null
3977 // method.
3978 __ testptr(rbx, rbx);
3979 __ jcc(Assembler::zero, no_such_method);
3980
3981 __ profile_called_method(rbx, rbcp, rdx);
3982 __ profile_arguments_type(rdx, rbx, rbcp, true);
3983
3984 // do the call
3985 // rcx: receiver
3986 // rbx,: Method*
3987 __ jump_from_interpreted(rbx, rdx);
3988 __ should_not_reach_here();
3989
3990 // exception handling code follows...
3991 // note: must restore interpreter registers to canonical
3992 // state for exception handling to work correctly!
3993
3994 __ bind(no_such_method);
3995 // throw exception
3996 __ pop(rbx); // pop return address (pushed by prepare_invoke)
3997 __ restore_bcp(); // rbcp must be correct for exception handler (was destroyed)
3998 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
3999 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodError));
4000 // the call_VM checks for exception, so we should never return here.
4001 __ should_not_reach_here();
4002
4003 __ bind(no_such_interface);
4004 // throw exception
4005 __ pop(rbx); // pop return address (pushed by prepare_invoke)
4006 __ restore_bcp(); // rbcp must be correct for exception handler (was destroyed)
4007 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
4008 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
4009 InterpreterRuntime::throw_IncompatibleClassChangeError));
4010 // the call_VM checks for exception, so we should never return here.
4011 __ should_not_reach_here();
4012 }
4013
4014 void TemplateTable::invokehandle(int byte_no) {
4015 transition(vtos, vtos);
4016 assert(byte_no == f1_byte, "use this argument");
4017 const Register rbx_method = rbx;
4018 const Register rax_mtype = rax;
4019 const Register rcx_recv = rcx;
4020 const Register rdx_flags = rdx;
4021
4022 prepare_invoke(byte_no, rbx_method, rax_mtype, rcx_recv);
4023 __ verify_method_ptr(rbx_method);
4024 __ verify_oop(rcx_recv);
4025 __ null_check(rcx_recv);
4026
4027 // rax: MethodType object (from cpool->resolved_references[f1], if necessary)
4028 // rbx: MH.invokeExact_MT method (from f2)
4029
4030 // Note: rax_mtype is already pushed (if necessary) by prepare_invoke
4031
4032 // FIXME: profile the LambdaForm also
4033 __ profile_final_call(rax);
4034 __ profile_arguments_type(rdx, rbx_method, rbcp, true);
4035
4036 __ jump_from_interpreted(rbx_method, rdx);
4037 }
4038
4039 void TemplateTable::invokedynamic(int byte_no) {
4040 transition(vtos, vtos);
4041 assert(byte_no == f1_byte, "use this argument");
4042
4043 const Register rbx_method = rbx;
4044 const Register rax_callsite = rax;
4045
4046 prepare_invoke(byte_no, rbx_method, rax_callsite);
4047
4048 // rax: CallSite object (from cpool->resolved_references[f1])
4049 // rbx: MH.linkToCallSite method (from f2)
4050
4051 // Note: rax_callsite is already pushed by prepare_invoke
4052
4053 // %%% should make a type profile for any invokedynamic that takes a ref argument
4054 // profile this call
4055 __ profile_call(rbcp);
4056 __ profile_arguments_type(rdx, rbx_method, rbcp, false);
4057
4058 __ verify_oop(rax_callsite);
4059
4060 __ jump_from_interpreted(rbx_method, rdx);
4061 }
4062
4063 //-----------------------------------------------------------------------------
4064 // Allocation
4065
4066 void TemplateTable::_new() {
4067 transition(vtos, atos);
4068 __ get_unsigned_2_byte_index_at_bcp(rdx, 1);
4069 Label slow_case;
4070 Label slow_case_no_pop;
4071 Label done;
4072 Label initialize_header;
4073 Label initialize_object; // including clearing the fields
4074 Label allocate_shared;
4075
4076 __ get_cpool_and_tags(rcx, rax);
4077
4078 // Make sure the class we're about to instantiate has been resolved.
4079 // This is done before loading InstanceKlass to be consistent with the order
4080 // how Constant Pool is updated (see ConstantPool::klass_at_put)
4081 const int tags_offset = Array<u1>::base_offset_in_bytes();
4082 __ cmpb(Address(rax, rdx, Address::times_1, tags_offset), JVM_CONSTANT_Class);
4083 __ jcc(Assembler::notEqual, slow_case_no_pop);
4084
4085 // get InstanceKlass
4086 __ load_resolved_klass_at_index(rcx, rdx, rcx);
4087 __ push(rcx); // save the contexts of klass for initializing the header
4088
4089 // make sure klass is initialized & doesn't have finalizer
4090 // make sure klass is fully initialized
4091 __ cmpb(Address(rcx, InstanceKlass::init_state_offset()), InstanceKlass::fully_initialized);
4092 __ jcc(Assembler::notEqual, slow_case);
4093
4094 // get instance_size in InstanceKlass (scaled to a count of bytes)
4095 __ movl(rdx, Address(rcx, Klass::layout_helper_offset()));
4096 // test to see if it has a finalizer or is malformed in some way
4097 __ testl(rdx, Klass::_lh_instance_slow_path_bit);
4098 __ jcc(Assembler::notZero, slow_case);
4099
4100 //
4101 // Allocate the instance
4102 // 1) Try to allocate in the TLAB
4103 // 2) if fail and the object is large allocate in the shared Eden
4104 // 3) if the above fails (or is not applicable), go to a slow case
4105 // (creates a new TLAB, etc.)
4106
4107 const bool allow_shared_alloc =
4108 Universe::heap()->supports_inline_contig_alloc();
4109
4110 const Register thread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
4111 #ifndef _LP64
4112 if (UseTLAB || allow_shared_alloc) {
4113 __ get_thread(thread);
4114 }
4115 #endif // _LP64
4116
4117 if (UseTLAB) {
4118 __ movptr(rax, Address(thread, in_bytes(JavaThread::tlab_top_offset())));
4119 __ lea(rbx, Address(rax, rdx, Address::times_1));
4120 __ cmpptr(rbx, Address(thread, in_bytes(JavaThread::tlab_end_offset())));
4121 __ jcc(Assembler::above, allow_shared_alloc ? allocate_shared : slow_case);
4122 __ movptr(Address(thread, in_bytes(JavaThread::tlab_top_offset())), rbx);
4123 if (ZeroTLAB) {
4124 // the fields have been already cleared
4125 __ jmp(initialize_header);
4126 } else {
4127 // initialize both the header and fields
4128 __ jmp(initialize_object);
4129 }
4130 }
4131
4132 // Allocation in the shared Eden, if allowed.
4133 //
4134 // rdx: instance size in bytes
4135 if (allow_shared_alloc) {
4136 __ bind(allocate_shared);
4137
4138 ExternalAddress heap_top((address)Universe::heap()->top_addr());
4139 ExternalAddress heap_end((address)Universe::heap()->end_addr());
4140
4141 Label retry;
4142 __ bind(retry);
4143 __ movptr(rax, heap_top);
4144 __ lea(rbx, Address(rax, rdx, Address::times_1));
4145 __ cmpptr(rbx, heap_end);
4146 __ jcc(Assembler::above, slow_case);
4147
4148 // Compare rax, with the top addr, and if still equal, store the new
4149 // top addr in rbx, at the address of the top addr pointer. Sets ZF if was
4150 // equal, and clears it otherwise. Use lock prefix for atomicity on MPs.
4151 //
4152 // rax,: object begin
4153 // rbx,: object end
4154 // rdx: instance size in bytes
4155 __ locked_cmpxchgptr(rbx, heap_top);
4156
4157 // if someone beat us on the allocation, try again, otherwise continue
4158 __ jcc(Assembler::notEqual, retry);
4159
4160 __ incr_allocated_bytes(thread, rdx, 0);
4161 }
4162
4163 if (UseTLAB || Universe::heap()->supports_inline_contig_alloc()) {
4164 // The object is initialized before the header. If the object size is
4165 // zero, go directly to the header initialization.
4166 __ bind(initialize_object);
4167 __ decrement(rdx, sizeof(oopDesc));
4168 __ jcc(Assembler::zero, initialize_header);
4169
4170 // Initialize topmost object field, divide rdx by 8, check if odd and
4171 // test if zero.
4172 __ xorl(rcx, rcx); // use zero reg to clear memory (shorter code)
4173 __ shrl(rdx, LogBytesPerLong); // divide by 2*oopSize and set carry flag if odd
4174
4175 // rdx must have been multiple of 8
4176 #ifdef ASSERT
4177 // make sure rdx was multiple of 8
4178 Label L;
4179 // Ignore partial flag stall after shrl() since it is debug VM
4180 __ jccb(Assembler::carryClear, L);
4181 __ stop("object size is not multiple of 2 - adjust this code");
4182 __ bind(L);
4183 // rdx must be > 0, no extra check needed here
4184 #endif
4185
4186 // initialize remaining object fields: rdx was a multiple of 8
4187 { Label loop;
4188 __ bind(loop);
4189 __ movptr(Address(rax, rdx, Address::times_8, sizeof(oopDesc) - 1*oopSize), rcx);
4190 NOT_LP64(__ movptr(Address(rax, rdx, Address::times_8, sizeof(oopDesc) - 2*oopSize), rcx));
4191 __ decrement(rdx);
4192 __ jcc(Assembler::notZero, loop);
4193 }
4194
4195 // initialize object header only.
4196 __ bind(initialize_header);
4197 if (UseBiasedLocking) {
4198 __ pop(rcx); // get saved klass back in the register.
4199 __ movptr(rbx, Address(rcx, Klass::prototype_header_offset()));
4200 __ movptr(Address(rax, oopDesc::mark_offset_in_bytes ()), rbx);
4201 } else {
4202 __ movptr(Address(rax, oopDesc::mark_offset_in_bytes ()),
4203 (intptr_t)markOopDesc::prototype()); // header
4204 __ pop(rcx); // get saved klass back in the register.
4205 }
4206 #ifdef _LP64
4207 __ xorl(rsi, rsi); // use zero reg to clear memory (shorter code)
4208 __ store_klass_gap(rax, rsi); // zero klass gap for compressed oops
4209 #endif
4210 __ store_klass(rax, rcx); // klass
4211
4212 {
4213 SkipIfEqual skip_if(_masm, &DTraceAllocProbes, 0);
4214 // Trigger dtrace event for fastpath
4215 __ push(atos);
4216 __ call_VM_leaf(
4217 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc), rax);
4218 __ pop(atos);
4219 }
4220
4221 __ jmp(done);
4222 }
4223
4224 // slow case
4225 __ bind(slow_case);
4226 __ pop(rcx); // restore stack pointer to what it was when we came in.
4227 __ bind(slow_case_no_pop);
4228
4229 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rax);
4230 Register rarg2 = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
4231
4232 __ get_constant_pool(rarg1);
4233 __ get_unsigned_2_byte_index_at_bcp(rarg2, 1);
4234 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::_new), rarg1, rarg2);
4235 __ verify_oop(rax);
4236
4237 // continue
4238 __ bind(done);
4239 }
4240
4241 void TemplateTable::vdefault() {
4242 transition(vtos, qtos);
4243
4244 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
4245 Register rarg2 = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
4246
4247 __ get_unsigned_2_byte_index_at_bcp(rarg2, 1);
4248 __ get_constant_pool(rarg1);
4249
4250 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::vdefault),
4251 rarg1, rarg2);
4252 __ verify_oop(rax);
4253 }
4254
4255 void TemplateTable::newarray() {
4256 transition(itos, atos);
4257 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
4258 __ load_unsigned_byte(rarg1, at_bcp(1));
4259 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::newarray),
4260 rarg1, rax);
4261 }
4262
4263 void TemplateTable::anewarray() {
4264 transition(itos, atos);
4265
4266 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
4267 Register rarg2 = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
4268
4269 __ get_unsigned_2_byte_index_at_bcp(rarg2, 1);
4270 __ get_constant_pool(rarg1);
4271 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::anewarray),
4272 rarg1, rarg2, rax);
4273 }
4274
4275 void TemplateTable::arraylength() {
4276 transition(atos, itos);
4277 __ null_check(rax, arrayOopDesc::length_offset_in_bytes());
4278 __ movl(rax, Address(rax, arrayOopDesc::length_offset_in_bytes()));
4279 }
4280
4281 void TemplateTable::checkcast() {
4282 transition(atos, atos);
4283 Label done, is_null, ok_is_subtype, quicked, resolved;
4284 __ testptr(rax, rax); // object is in rax
4285 __ jcc(Assembler::zero, is_null);
4286
4287 // Get cpool & tags index
4288 __ get_cpool_and_tags(rcx, rdx); // rcx=cpool, rdx=tags array
4289 __ get_unsigned_2_byte_index_at_bcp(rbx, 1); // rbx=index
4290 // See if bytecode has already been quicked
4291 __ cmpb(Address(rdx, rbx,
4292 Address::times_1,
4293 Array<u1>::base_offset_in_bytes()),
4294 JVM_CONSTANT_Class);
4295 __ jcc(Assembler::equal, quicked);
4296 __ push(atos); // save receiver for result, and for GC
4297 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc));
4298
4299 // vm_result_2 has metadata result
4300 #ifndef _LP64
4301 // borrow rdi from locals
4302 __ get_thread(rdi);
4303 __ get_vm_result_2(rax, rdi);
4304 __ restore_locals();
4305 #else
4306 __ get_vm_result_2(rax, r15_thread);
4307 #endif
4308
4309 __ pop_ptr(rdx); // restore receiver
4310 __ jmpb(resolved);
4311
4312 // Get superklass in rax and subklass in rbx
4313 __ bind(quicked);
4314 __ mov(rdx, rax); // Save object in rdx; rax needed for subtype check
4315 __ load_resolved_klass_at_index(rcx, rbx, rax);
4316
4317 __ bind(resolved);
4318 __ load_klass(rbx, rdx);
4319
4320 // Generate subtype check. Blows rcx, rdi. Object in rdx.
4321 // Superklass in rax. Subklass in rbx.
4322 __ gen_subtype_check(rbx, ok_is_subtype);
4323
4324 // Come here on failure
4325 __ push_ptr(rdx);
4326 // object is at TOS
4327 __ jump(ExternalAddress(Interpreter::_throw_ClassCastException_entry));
4328
4329 // Come here on success
4330 __ bind(ok_is_subtype);
4331 __ mov(rax, rdx); // Restore object in rdx
4332
4333 // Collect counts on whether this check-cast sees NULLs a lot or not.
4334 if (ProfileInterpreter) {
4335 __ jmp(done);
4336 __ bind(is_null);
4337 __ profile_null_seen(rcx);
4338 } else {
4339 __ bind(is_null); // same as 'done'
4340 }
4341 __ bind(done);
4342 }
4343
4344 void TemplateTable::instanceof() {
4345 transition(atos, itos);
4346 Label done, is_null, ok_is_subtype, quicked, resolved;
4347 __ testptr(rax, rax);
4348 __ jcc(Assembler::zero, is_null);
4349
4350 // Get cpool & tags index
4351 __ get_cpool_and_tags(rcx, rdx); // rcx=cpool, rdx=tags array
4352 __ get_unsigned_2_byte_index_at_bcp(rbx, 1); // rbx=index
4353 // See if bytecode has already been quicked
4354 __ cmpb(Address(rdx, rbx,
4355 Address::times_1,
4356 Array<u1>::base_offset_in_bytes()),
4357 JVM_CONSTANT_Class);
4358 __ jcc(Assembler::equal, quicked);
4359
4360 __ push(atos); // save receiver for result, and for GC
4361 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc));
4362 // vm_result_2 has metadata result
4363
4364 #ifndef _LP64
4365 // borrow rdi from locals
4366 __ get_thread(rdi);
4367 __ get_vm_result_2(rax, rdi);
4368 __ restore_locals();
4369 #else
4370 __ get_vm_result_2(rax, r15_thread);
4371 #endif
4372
4373 __ pop_ptr(rdx); // restore receiver
4374 __ verify_oop(rdx);
4375 __ load_klass(rdx, rdx);
4376 __ jmpb(resolved);
4377
4378 // Get superklass in rax and subklass in rdx
4379 __ bind(quicked);
4380 __ load_klass(rdx, rax);
4381 __ load_resolved_klass_at_index(rcx, rbx, rax);
4382
4383 __ bind(resolved);
4384
4385 // Generate subtype check. Blows rcx, rdi
4386 // Superklass in rax. Subklass in rdx.
4387 __ gen_subtype_check(rdx, ok_is_subtype);
4388
4389 // Come here on failure
4390 __ xorl(rax, rax);
4391 __ jmpb(done);
4392 // Come here on success
4393 __ bind(ok_is_subtype);
4394 __ movl(rax, 1);
4395
4396 // Collect counts on whether this test sees NULLs a lot or not.
4397 if (ProfileInterpreter) {
4398 __ jmp(done);
4399 __ bind(is_null);
4400 __ profile_null_seen(rcx);
4401 } else {
4402 __ bind(is_null); // same as 'done'
4403 }
4404 __ bind(done);
4405 // rax = 0: obj == NULL or obj is not an instanceof the specified klass
4406 // rax = 1: obj != NULL and obj is an instanceof the specified klass
4407 }
4408
4409 void TemplateTable::_vbox() {
4410 transition(qtos, atos);
4411
4412 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
4413 Register rarg2 = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
4414
4415 __ get_unsigned_2_byte_index_at_bcp(rarg2, 1);
4416 __ get_constant_pool(rarg1);
4417 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::vbox),
4418 rarg1, rarg2, rax);
4419 }
4420
4421 void TemplateTable::_vunbox() {
4422 transition(atos, qtos);
4423
4424 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
4425 Register rarg2 = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
4426
4427 __ get_unsigned_2_byte_index_at_bcp(rarg2, 1);
4428 __ get_constant_pool(rarg1);
4429 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::vunbox),
4430 rarg1, rarg2, rax);
4431 }
4432
4433 //----------------------------------------------------------------------------------------------------
4434 // Breakpoints
4435 void TemplateTable::_breakpoint() {
4436 // Note: We get here even if we are single stepping..
4437 // jbug insists on setting breakpoints at every bytecode
4438 // even if we are in single step mode.
4439
4440 transition(vtos, vtos);
4441
4442 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
4443
4444 // get the unpatched byte code
4445 __ get_method(rarg);
4446 __ call_VM(noreg,
4447 CAST_FROM_FN_PTR(address,
4448 InterpreterRuntime::get_original_bytecode_at),
4449 rarg, rbcp);
4450 __ mov(rbx, rax); // why?
4451
4452 // post the breakpoint event
4453 __ get_method(rarg);
4454 __ call_VM(noreg,
4455 CAST_FROM_FN_PTR(address, InterpreterRuntime::_breakpoint),
4456 rarg, rbcp);
4457
4458 // complete the execution of original bytecode
4459 __ dispatch_only_normal(vtos);
4460 }
4461
4462 //-----------------------------------------------------------------------------
4463 // Exceptions
4464
4465 void TemplateTable::athrow() {
4466 transition(atos, vtos);
4467 __ null_check(rax);
4468 __ jump(ExternalAddress(Interpreter::throw_exception_entry()));
4469 }
4470
4471 //-----------------------------------------------------------------------------
4472 // Synchronization
4473 //
4474 // Note: monitorenter & exit are symmetric routines; which is reflected
4475 // in the assembly code structure as well
4476 //
4477 // Stack layout:
4478 //
4479 // [expressions ] <--- rsp = expression stack top
4480 // ..
4481 // [expressions ]
4482 // [monitor entry] <--- monitor block top = expression stack bot
4483 // ..
4484 // [monitor entry]
4485 // [frame data ] <--- monitor block bot
4486 // ...
4487 // [saved rbp ] <--- rbp
4488 void TemplateTable::monitorenter() {
4489 transition(atos, vtos);
4490
4491 // check for NULL object
4492 __ null_check(rax);
4493
4494 const Address monitor_block_top(
4495 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
4496 const Address monitor_block_bot(
4497 rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
4498 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
4499
4500 Label allocated;
4501
4502 Register rtop = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
4503 Register rbot = LP64_ONLY(c_rarg2) NOT_LP64(rbx);
4504 Register rmon = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
4505
4506 // initialize entry pointer
4507 __ xorl(rmon, rmon); // points to free slot or NULL
4508
4509 // find a free slot in the monitor block (result in rmon)
4510 {
4511 Label entry, loop, exit;
4512 __ movptr(rtop, monitor_block_top); // points to current entry,
4513 // starting with top-most entry
4514 __ lea(rbot, monitor_block_bot); // points to word before bottom
4515 // of monitor block
4516 __ jmpb(entry);
4517
4518 __ bind(loop);
4519 // check if current entry is used
4520 __ cmpptr(Address(rtop, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL_WORD);
4521 // if not used then remember entry in rmon
4522 __ cmovptr(Assembler::equal, rmon, rtop); // cmov => cmovptr
4523 // check if current entry is for same object
4524 __ cmpptr(rax, Address(rtop, BasicObjectLock::obj_offset_in_bytes()));
4525 // if same object then stop searching
4526 __ jccb(Assembler::equal, exit);
4527 // otherwise advance to next entry
4528 __ addptr(rtop, entry_size);
4529 __ bind(entry);
4530 // check if bottom reached
4531 __ cmpptr(rtop, rbot);
4532 // if not at bottom then check this entry
4533 __ jcc(Assembler::notEqual, loop);
4534 __ bind(exit);
4535 }
4536
4537 __ testptr(rmon, rmon); // check if a slot has been found
4538 __ jcc(Assembler::notZero, allocated); // if found, continue with that one
4539
4540 // allocate one if there's no free slot
4541 {
4542 Label entry, loop;
4543 // 1. compute new pointers // rsp: old expression stack top
4544 __ movptr(rmon, monitor_block_bot); // rmon: old expression stack bottom
4545 __ subptr(rsp, entry_size); // move expression stack top
4546 __ subptr(rmon, entry_size); // move expression stack bottom
4547 __ mov(rtop, rsp); // set start value for copy loop
4548 __ movptr(monitor_block_bot, rmon); // set new monitor block bottom
4549 __ jmp(entry);
4550 // 2. move expression stack contents
4551 __ bind(loop);
4552 __ movptr(rbot, Address(rtop, entry_size)); // load expression stack
4553 // word from old location
4554 __ movptr(Address(rtop, 0), rbot); // and store it at new location
4555 __ addptr(rtop, wordSize); // advance to next word
4556 __ bind(entry);
4557 __ cmpptr(rtop, rmon); // check if bottom reached
4558 __ jcc(Assembler::notEqual, loop); // if not at bottom then
4559 // copy next word
4560 }
4561
4562 // call run-time routine
4563 // rmon: points to monitor entry
4564 __ bind(allocated);
4565
4566 // Increment bcp to point to the next bytecode, so exception
4567 // handling for async. exceptions work correctly.
4568 // The object has already been poped from the stack, so the
4569 // expression stack looks correct.
4570 __ increment(rbcp);
4571
4572 // store object
4573 __ movptr(Address(rmon, BasicObjectLock::obj_offset_in_bytes()), rax);
4574 __ lock_object(rmon);
4575
4576 // check to make sure this monitor doesn't cause stack overflow after locking
4577 __ save_bcp(); // in case of exception
4578 __ generate_stack_overflow_check(0);
4579
4580 // The bcp has already been incremented. Just need to dispatch to
4581 // next instruction.
4582 __ dispatch_next(vtos);
4583 }
4584
4585 void TemplateTable::monitorexit() {
4586 transition(atos, vtos);
4587
4588 // check for NULL object
4589 __ null_check(rax);
4590
4591 const Address monitor_block_top(
4592 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
4593 const Address monitor_block_bot(
4594 rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
4595 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
4596
4597 Register rtop = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
4598 Register rbot = LP64_ONLY(c_rarg2) NOT_LP64(rbx);
4599
4600 Label found;
4601
4602 // find matching slot
4603 {
4604 Label entry, loop;
4605 __ movptr(rtop, monitor_block_top); // points to current entry,
4606 // starting with top-most entry
4607 __ lea(rbot, monitor_block_bot); // points to word before bottom
4608 // of monitor block
4609 __ jmpb(entry);
4610
4611 __ bind(loop);
4612 // check if current entry is for same object
4613 __ cmpptr(rax, Address(rtop, BasicObjectLock::obj_offset_in_bytes()));
4614 // if same object then stop searching
4615 __ jcc(Assembler::equal, found);
4616 // otherwise advance to next entry
4617 __ addptr(rtop, entry_size);
4618 __ bind(entry);
4619 // check if bottom reached
4620 __ cmpptr(rtop, rbot);
4621 // if not at bottom then check this entry
4622 __ jcc(Assembler::notEqual, loop);
4623 }
4624
4625 // error handling. Unlocking was not block-structured
4626 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
4627 InterpreterRuntime::throw_illegal_monitor_state_exception));
4628 __ should_not_reach_here();
4629
4630 // call run-time routine
4631 __ bind(found);
4632 __ push_ptr(rax); // make sure object is on stack (contract with oopMaps)
4633 __ unlock_object(rtop);
4634 __ pop_ptr(rax); // discard object
4635 }
4636
4637 // Wide instructions
4638 void TemplateTable::wide() {
4639 transition(vtos, vtos);
4640 __ load_unsigned_byte(rbx, at_bcp(1));
4641 ExternalAddress wtable((address)Interpreter::_wentry_point);
4642 __ jump(ArrayAddress(wtable, Address(noreg, rbx, Address::times_ptr)));
4643 // Note: the rbcp increment step is part of the individual wide bytecode implementations
4644 }
4645
4646 // Multi arrays
4647 void TemplateTable::multianewarray() {
4648 transition(vtos, atos);
4649
4650 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rax);
4651 __ load_unsigned_byte(rax, at_bcp(3)); // get number of dimensions
4652 // last dim is on top of stack; we want address of first one:
4653 // first_addr = last_addr + (ndims - 1) * stackElementSize - 1*wordsize
4654 // the latter wordSize to point to the beginning of the array.
4655 __ lea(rarg, Address(rsp, rax, Interpreter::stackElementScale(), -wordSize));
4656 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::multianewarray), rarg);
4657 __ load_unsigned_byte(rbx, at_bcp(3));
4658 __ lea(rsp, Address(rsp, rbx, Interpreter::stackElementScale())); // get rid of counts
4659 }