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);
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);
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 __ cmpptr(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);
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);
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);
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);
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);
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);
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 if (state == qtos) {
2667 const Register thread1 = NOT_LP64(rcx) LP64_ONLY(r15_thread);
2668 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::return_value), rax);
2669 NOT_LP64(__ get_thread(thread1));
2670 __ get_vm_result(rax, thread1);
2671 }
2672 // Narrow result if state is itos but result type is smaller.
2673 // Need to narrow in the return bytecode rather than in generate_return_entry
2674 // since compiled code callers expect the result to already be narrowed.
2675 if (state == itos) {
2676 __ narrow(rax);
2677 }
2678
2679 #ifdef ASSERT
2680 if (EnableMVT || EnableValhalla) {
2681 if (state == atos) {
2682 const Register thread1 = NOT_LP64(rcx) LP64_ONLY(r15_thread);
2683 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::check_areturn), rax);
2684 NOT_LP64(__ get_thread(thread1));
2685 __ get_vm_result(rax, thread1);
2686 }
2687 }
2688 #endif // ASSERT
2689
2690 __ remove_activation(state, rbcp, true, true, true, state == qtos && ValueTypeReturnedAsFields);
2691
2692 __ jmp(rbcp);
2693 }
2694
2695 // ----------------------------------------------------------------------------
2696 // Volatile variables demand their effects be made known to all CPU's
2697 // in order. Store buffers on most chips allow reads & writes to
2698 // reorder; the JMM's ReadAfterWrite.java test fails in -Xint mode
2699 // without some kind of memory barrier (i.e., it's not sufficient that
2700 // the interpreter does not reorder volatile references, the hardware
2701 // also must not reorder them).
2702 //
2703 // According to the new Java Memory Model (JMM):
2704 // (1) All volatiles are serialized wrt to each other. ALSO reads &
2705 // writes act as aquire & release, so:
2706 // (2) A read cannot let unrelated NON-volatile memory refs that
2707 // happen after the read float up to before the read. It's OK for
2708 // non-volatile memory refs that happen before the volatile read to
2709 // float down below it.
2710 // (3) Similar a volatile write cannot let unrelated NON-volatile
2711 // memory refs that happen BEFORE the write float down to after the
2712 // write. It's OK for non-volatile memory refs that happen after the
2713 // volatile write to float up before it.
2714 //
2715 // We only put in barriers around volatile refs (they are expensive),
2716 // not _between_ memory refs (that would require us to track the
2717 // flavor of the previous memory refs). Requirements (2) and (3)
2718 // require some barriers before volatile stores and after volatile
2719 // loads. These nearly cover requirement (1) but miss the
2720 // volatile-store-volatile-load case. This final case is placed after
2721 // volatile-stores although it could just as well go before
2722 // volatile-loads.
2723
2724 void TemplateTable::volatile_barrier(Assembler::Membar_mask_bits order_constraint ) {
2725 // Helper function to insert a is-volatile test and memory barrier
2726 if(!os::is_MP()) return; // Not needed on single CPU
2727 __ membar(order_constraint);
2728 }
2729
2730 void TemplateTable::resolve_cache_and_index(int byte_no,
2731 Register Rcache,
2732 Register index,
2733 size_t index_size) {
2734 const Register temp = rbx;
2735 assert_different_registers(Rcache, index, temp);
2736
2737 Label resolved;
2738
2739 Bytecodes::Code code = bytecode();
2740 switch (code) {
2741 case Bytecodes::_nofast_getfield: code = Bytecodes::_getfield; break;
2742 case Bytecodes::_nofast_putfield: code = Bytecodes::_putfield; break;
2743 default: break;
2744 }
2745
2746 assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range");
2747 __ get_cache_and_index_and_bytecode_at_bcp(Rcache, index, temp, byte_no, 1, index_size);
2748 __ cmpl(temp, code); // have we resolved this bytecode?
2749 __ jcc(Assembler::equal, resolved);
2750
2751 // resolve first time through
2752 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_from_cache);
2753 __ movl(temp, code);
2754 __ call_VM(noreg, entry, temp);
2755 // Update registers with resolved info
2756 __ get_cache_and_index_at_bcp(Rcache, index, 1, index_size);
2757 __ bind(resolved);
2758 }
2759
2760 // The cache and index registers must be set before call
2761 void TemplateTable::load_field_cp_cache_entry(Register obj,
2762 Register cache,
2763 Register index,
2764 Register off,
2765 Register flags,
2766 bool is_static = false) {
2767 assert_different_registers(cache, index, flags, off);
2768
2769 ByteSize cp_base_offset = ConstantPoolCache::base_offset();
2770 // Field offset
2771 __ movptr(off, Address(cache, index, Address::times_ptr,
2772 in_bytes(cp_base_offset +
2773 ConstantPoolCacheEntry::f2_offset())));
2774 // Flags
2775 __ movl(flags, Address(cache, index, Address::times_ptr,
2776 in_bytes(cp_base_offset +
2777 ConstantPoolCacheEntry::flags_offset())));
2778
2779 // klass overwrite register
2780 if (is_static) {
2781 __ movptr(obj, Address(cache, index, Address::times_ptr,
2782 in_bytes(cp_base_offset +
2783 ConstantPoolCacheEntry::f1_offset())));
2784 const int mirror_offset = in_bytes(Klass::java_mirror_offset());
2785 __ movptr(obj, Address(obj, mirror_offset));
2786 }
2787 }
2788
2789 void TemplateTable::load_invoke_cp_cache_entry(int byte_no,
2790 Register method,
2791 Register itable_index,
2792 Register flags,
2793 bool is_invokevirtual,
2794 bool is_invokevfinal, /*unused*/
2795 bool is_invokedynamic) {
2796 // setup registers
2797 const Register cache = rcx;
2798 const Register index = rdx;
2799 assert_different_registers(method, flags);
2800 assert_different_registers(method, cache, index);
2801 assert_different_registers(itable_index, flags);
2802 assert_different_registers(itable_index, cache, index);
2803 // determine constant pool cache field offsets
2804 assert(is_invokevirtual == (byte_no == f2_byte), "is_invokevirtual flag redundant");
2805 const int method_offset = in_bytes(
2806 ConstantPoolCache::base_offset() +
2807 ((byte_no == f2_byte)
2808 ? ConstantPoolCacheEntry::f2_offset()
2809 : ConstantPoolCacheEntry::f1_offset()));
2810 const int flags_offset = in_bytes(ConstantPoolCache::base_offset() +
2811 ConstantPoolCacheEntry::flags_offset());
2812 // access constant pool cache fields
2813 const int index_offset = in_bytes(ConstantPoolCache::base_offset() +
2814 ConstantPoolCacheEntry::f2_offset());
2815
2816 size_t index_size = (is_invokedynamic ? sizeof(u4) : sizeof(u2));
2817 resolve_cache_and_index(byte_no, cache, index, index_size);
2818 __ movptr(method, Address(cache, index, Address::times_ptr, method_offset));
2819
2820 if (itable_index != noreg) {
2821 // pick up itable or appendix index from f2 also:
2822 __ movptr(itable_index, Address(cache, index, Address::times_ptr, index_offset));
2823 }
2824 __ movl(flags, Address(cache, index, Address::times_ptr, flags_offset));
2825 }
2826
2827 // The registers cache and index expected to be set before call.
2828 // Correct values of the cache and index registers are preserved.
2829 void TemplateTable::jvmti_post_field_access(Register cache,
2830 Register index,
2831 bool is_static,
2832 bool has_tos) {
2833 if (JvmtiExport::can_post_field_access()) {
2834 // Check to see if a field access watch has been set before we take
2835 // the time to call into the VM.
2836 Label L1;
2837 assert_different_registers(cache, index, rax);
2838 __ mov32(rax, ExternalAddress((address) JvmtiExport::get_field_access_count_addr()));
2839 __ testl(rax,rax);
2840 __ jcc(Assembler::zero, L1);
2841
2842 // cache entry pointer
2843 __ addptr(cache, in_bytes(ConstantPoolCache::base_offset()));
2844 __ shll(index, LogBytesPerWord);
2845 __ addptr(cache, index);
2846 if (is_static) {
2847 __ xorptr(rax, rax); // NULL object reference
2848 } else {
2849 __ pop(atos); // Get the object
2850 __ verify_oop(rax);
2851 __ push(atos); // Restore stack state
2852 }
2853 // rax,: object pointer or NULL
2854 // cache: cache entry pointer
2855 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access),
2856 rax, cache);
2857 __ get_cache_and_index_at_bcp(cache, index, 1);
2858 __ bind(L1);
2859 }
2860 }
2861
2862 void TemplateTable::pop_and_check_object(Register r) {
2863 __ pop_ptr(r);
2864 __ null_check(r); // for field access must check obj.
2865 __ verify_oop(r);
2866 }
2867
2868 void TemplateTable::getfield_or_static(int byte_no, bool is_static, RewriteControl rc) {
2869 transition(vtos, vtos);
2870
2871 const Register cache = rcx;
2872 const Register index = rdx;
2873 const Register obj = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
2874 const Register off = rbx;
2875 const Register flags = rax;
2876 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // uses same reg as obj, so don't mix them
2877 const Register flags2 = rdx;
2878
2879 resolve_cache_and_index(byte_no, cache, index, sizeof(u2));
2880 jvmti_post_field_access(cache, index, is_static, false);
2881 load_field_cp_cache_entry(obj, cache, index, off, flags, is_static);
2882
2883 const Address field(obj, off, Address::times_1, 0*wordSize);
2884 NOT_LP64(const Address hi(obj, off, Address::times_1, 1*wordSize));
2885
2886 Label Done, notByte, notBool, notInt, notShort, notChar, notLong, notFloat, notObj, notValueType, notDouble;
2887
2888 __ movl(flags2, flags);
2889
2890 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift);
2891 // Make sure we don't need to mask edx after the above shift
2892 assert(btos == 0, "change code, btos != 0");
2893
2894 __ andl(flags, ConstantPoolCacheEntry::tos_state_mask);
2895
2896 __ jcc(Assembler::notZero, notByte);
2897 // btos
2898 if (!is_static) pop_and_check_object(obj);
2899 __ load_signed_byte(rax, field);
2900 __ push(btos);
2901 // Rewrite bytecode to be faster
2902 if (!is_static && rc == may_rewrite) {
2903 patch_bytecode(Bytecodes::_fast_bgetfield, bc, rbx);
2904 }
2905 __ jmp(Done);
2906
2907 __ bind(notByte);
2908
2909 __ cmpl(flags, qtos);
2910 __ jcc(Assembler::notEqual, notValueType);
2911 // qtos
2912 if (is_static) {
2913 Label initialized;
2914 // Issue below if the static field has not been initialized yet
2915 __ load_heap_oop(rax, field);
2916 __ testptr(rax, rax);
2917 __ jcc(Assembler::notZero, initialized);
2918 __ andl(flags2, ConstantPoolCacheEntry::field_index_mask);
2919 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::initialize_static_value_field),
2920 obj, flags2);
2921 __ verify_oop(rax);
2922 __ bind(initialized);
2923 __ push(qtos);
2924 } else {
2925 pop_and_check_object(obj);
2926 __ andl(flags2, ConstantPoolCacheEntry::field_index_mask);
2927 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::qgetfield),
2928 obj, flags2);
2929 __ verify_oop(rax);
2930 __ push(qtos);
2931 // Bytecode rewrite?
2932 }
2933 __ jmp(Done);
2934
2935 __ bind(notValueType);
2936
2937 if (!is_static) pop_and_check_object(obj);
2938
2939 __ cmpl(flags, ztos);
2940 __ jcc(Assembler::notEqual, notBool);
2941
2942 // ztos (same code as btos)
2943 __ load_signed_byte(rax, field);
2944 __ push(ztos);
2945 // Rewrite bytecode to be faster
2946 if (!is_static && rc == may_rewrite) {
2947 // use btos rewriting, no truncating to t/f bit is needed for getfield.
2948 patch_bytecode(Bytecodes::_fast_bgetfield, bc, rbx);
2949 }
2950 __ jmp(Done);
2951
2952 __ bind(notBool);
2953 __ cmpl(flags, atos);
2954 __ jcc(Assembler::notEqual, notObj);
2955 // atos
2956 __ load_heap_oop(rax, field);
2957 __ push(atos);
2958 if (!is_static && rc == may_rewrite) {
2959 patch_bytecode(Bytecodes::_fast_agetfield, bc, rbx);
2960 }
2961 __ jmp(Done);
2962
2963 __ bind(notObj);
2964 __ cmpl(flags, itos);
2965 __ jcc(Assembler::notEqual, notInt);
2966 // itos
2967 __ movl(rax, field);
2968 __ push(itos);
2969 // Rewrite bytecode to be faster
2970 if (!is_static && rc == may_rewrite) {
2971 patch_bytecode(Bytecodes::_fast_igetfield, bc, rbx);
2972 }
2973 __ jmp(Done);
2974
2975 __ bind(notInt);
2976 __ cmpl(flags, ctos);
2977 __ jcc(Assembler::notEqual, notChar);
2978 // ctos
2979 __ load_unsigned_short(rax, field);
2980 __ push(ctos);
2981 // Rewrite bytecode to be faster
2982 if (!is_static && rc == may_rewrite) {
2983 patch_bytecode(Bytecodes::_fast_cgetfield, bc, rbx);
2984 }
2985 __ jmp(Done);
2986
2987 __ bind(notChar);
2988 __ cmpl(flags, stos);
2989 __ jcc(Assembler::notEqual, notShort);
2990 // stos
2991 __ load_signed_short(rax, field);
2992 __ push(stos);
2993 // Rewrite bytecode to be faster
2994 if (!is_static && rc == may_rewrite) {
2995 patch_bytecode(Bytecodes::_fast_sgetfield, bc, rbx);
2996 }
2997 __ jmp(Done);
2998
2999 __ bind(notShort);
3000 __ cmpl(flags, ltos);
3001 __ jcc(Assembler::notEqual, notLong);
3002 // ltos
3003
3004 #ifndef _LP64
3005 // Generate code as if volatile. There just aren't enough registers to
3006 // save that information and this code is faster than the test.
3007 __ fild_d(field); // Must load atomically
3008 __ subptr(rsp,2*wordSize); // Make space for store
3009 __ fistp_d(Address(rsp,0));
3010 __ pop(rax);
3011 __ pop(rdx);
3012 #else
3013 __ movq(rax, field);
3014 #endif
3015
3016 __ push(ltos);
3017 // Rewrite bytecode to be faster
3018 LP64_ONLY(if (!is_static && rc == may_rewrite) patch_bytecode(Bytecodes::_fast_lgetfield, bc, rbx));
3019 __ jmp(Done);
3020
3021 __ bind(notLong);
3022 __ cmpl(flags, ftos);
3023 __ jcc(Assembler::notEqual, notFloat);
3024 // ftos
3025
3026 __ load_float(field);
3027 __ push(ftos);
3028 // Rewrite bytecode to be faster
3029 if (!is_static && rc == may_rewrite) {
3030 patch_bytecode(Bytecodes::_fast_fgetfield, bc, rbx);
3031 }
3032 __ jmp(Done);
3033
3034 __ bind(notFloat);
3035 #ifdef ASSERT
3036 __ cmpl(flags, dtos);
3037 __ jcc(Assembler::notEqual, notDouble);
3038 #endif
3039 // dtos
3040 __ load_double(field);
3041 __ push(dtos);
3042 // Rewrite bytecode to be faster
3043 if (!is_static && rc == may_rewrite) {
3044 patch_bytecode(Bytecodes::_fast_dgetfield, bc, rbx);
3045 }
3046 #ifdef ASSERT
3047 __ jmp(Done);
3048
3049
3050 __ bind(notDouble);
3051 __ stop("Bad state");
3052 #endif
3053
3054 __ bind(Done);
3055 // [jk] not needed currently
3056 // volatile_barrier(Assembler::Membar_mask_bits(Assembler::LoadLoad |
3057 // Assembler::LoadStore));
3058 }
3059
3060 void TemplateTable::getfield(int byte_no) {
3061 getfield_or_static(byte_no, false);
3062 }
3063
3064 void TemplateTable::nofast_getfield(int byte_no) {
3065 getfield_or_static(byte_no, false, may_not_rewrite);
3066 }
3067
3068 void TemplateTable::getstatic(int byte_no) {
3069 getfield_or_static(byte_no, true);
3070 }
3071
3072 void TemplateTable::vwithfield() {
3073 transition(vtos, qtos);
3074
3075 Register cache = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
3076 Register index = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
3077
3078 resolve_cache_and_index(f2_byte, cache, index, sizeof(u2));
3079
3080 call_VM(rbx, CAST_FROM_FN_PTR(address, InterpreterRuntime::vwithfield), cache);
3081 // new value type is returned in rbx
3082 // stack adjustement is returned in rax
3083 __ verify_oop(rbx);
3084 __ addptr(rsp, rax);
3085 __ movptr(rax, rbx);
3086 }
3087
3088 // The registers cache and index expected to be set before call.
3089 // The function may destroy various registers, just not the cache and index registers.
3090 void TemplateTable::jvmti_post_field_mod(Register cache, Register index, bool is_static) {
3091
3092 const Register robj = LP64_ONLY(c_rarg2) NOT_LP64(rax);
3093 const Register RBX = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
3094 const Register RCX = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
3095 const Register RDX = LP64_ONLY(rscratch1) NOT_LP64(rdx);
3096
3097 ByteSize cp_base_offset = ConstantPoolCache::base_offset();
3098
3099 if (JvmtiExport::can_post_field_modification()) {
3100 // Check to see if a field modification watch has been set before
3101 // we take the time to call into the VM.
3102 Label L1;
3103 assert_different_registers(cache, index, rax);
3104 __ mov32(rax, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr()));
3105 __ testl(rax, rax);
3106 __ jcc(Assembler::zero, L1);
3107
3108 __ get_cache_and_index_at_bcp(robj, RDX, 1);
3109
3110
3111 if (is_static) {
3112 // Life is simple. Null out the object pointer.
3113 __ xorl(RBX, RBX);
3114
3115 } else {
3116 // Life is harder. The stack holds the value on top, followed by
3117 // the object. We don't know the size of the value, though; it
3118 // could be one or two words depending on its type. As a result,
3119 // we must find the type to determine where the object is.
3120 #ifndef _LP64
3121 Label two_word, valsize_known;
3122 #endif
3123 __ movl(RCX, Address(robj, RDX,
3124 Address::times_ptr,
3125 in_bytes(cp_base_offset +
3126 ConstantPoolCacheEntry::flags_offset())));
3127 NOT_LP64(__ mov(rbx, rsp));
3128 __ shrl(RCX, ConstantPoolCacheEntry::tos_state_shift);
3129
3130 // Make sure we don't need to mask rcx after the above shift
3131 ConstantPoolCacheEntry::verify_tos_state_shift();
3132 #ifdef _LP64
3133 __ movptr(c_rarg1, at_tos_p1()); // initially assume a one word jvalue
3134 __ cmpl(c_rarg3, ltos);
3135 __ cmovptr(Assembler::equal,
3136 c_rarg1, at_tos_p2()); // ltos (two word jvalue)
3137 __ cmpl(c_rarg3, dtos);
3138 __ cmovptr(Assembler::equal,
3139 c_rarg1, at_tos_p2()); // dtos (two word jvalue)
3140 #else
3141 __ cmpl(rcx, ltos);
3142 __ jccb(Assembler::equal, two_word);
3143 __ cmpl(rcx, dtos);
3144 __ jccb(Assembler::equal, two_word);
3145 __ addptr(rbx, Interpreter::expr_offset_in_bytes(1)); // one word jvalue (not ltos, dtos)
3146 __ jmpb(valsize_known);
3147
3148 __ bind(two_word);
3149 __ addptr(rbx, Interpreter::expr_offset_in_bytes(2)); // two words jvalue
3150
3151 __ bind(valsize_known);
3152 // setup object pointer
3153 __ movptr(rbx, Address(rbx, 0));
3154 #endif
3155 }
3156 // cache entry pointer
3157 __ addptr(robj, in_bytes(cp_base_offset));
3158 __ shll(RDX, LogBytesPerWord);
3159 __ addptr(robj, RDX);
3160 // object (tos)
3161 __ mov(RCX, rsp);
3162 // c_rarg1: object pointer set up above (NULL if static)
3163 // c_rarg2: cache entry pointer
3164 // c_rarg3: jvalue object on the stack
3165 __ call_VM(noreg,
3166 CAST_FROM_FN_PTR(address,
3167 InterpreterRuntime::post_field_modification),
3168 RBX, robj, RCX);
3169 __ get_cache_and_index_at_bcp(cache, index, 1);
3170 __ bind(L1);
3171 }
3172 }
3173
3174 void TemplateTable::putfield_or_static(int byte_no, bool is_static, RewriteControl rc) {
3175 transition(vtos, vtos);
3176
3177 const Register cache = rcx;
3178 const Register index = rdx;
3179 const Register obj = rcx;
3180 const Register off = rbx;
3181 const Register flags = rax;
3182 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
3183 const Register flags2 = rdx;
3184
3185 resolve_cache_and_index(byte_no, cache, index, sizeof(u2));
3186 jvmti_post_field_mod(cache, index, is_static);
3187 load_field_cp_cache_entry(obj, cache, index, off, flags, is_static);
3188
3189 // [jk] not needed currently
3190 // volatile_barrier(Assembler::Membar_mask_bits(Assembler::LoadStore |
3191 // Assembler::StoreStore));
3192
3193 Label notVolatile, Done;
3194
3195 __ movl(flags2, flags);
3196
3197 // field addresses
3198 const Address field(obj, off, Address::times_1, 0*wordSize);
3199 NOT_LP64( const Address hi(obj, off, Address::times_1, 1*wordSize);)
3200
3201 Label notByte, notBool, notInt, notShort, notChar,
3202 notLong, notFloat, notObj, notValueType, notDouble;
3203
3204 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift);
3205
3206 assert(btos == 0, "change code, btos != 0");
3207 __ andl(flags, ConstantPoolCacheEntry::tos_state_mask);
3208 __ jcc(Assembler::notZero, notByte);
3209
3210 // btos
3211 {
3212 __ pop(btos);
3213 if (!is_static) pop_and_check_object(obj);
3214 __ movb(field, rax);
3215 if (!is_static && rc == may_rewrite) {
3216 patch_bytecode(Bytecodes::_fast_bputfield, bc, rbx, true, byte_no);
3217 }
3218 __ jmp(Done);
3219 }
3220
3221 __ bind(notByte);
3222 __ cmpl(flags, ztos);
3223 __ jcc(Assembler::notEqual, notBool);
3224
3225 // ztos
3226 {
3227 __ pop(ztos);
3228 if (!is_static) pop_and_check_object(obj);
3229 __ andl(rax, 0x1);
3230 __ movb(field, rax);
3231 if (!is_static && rc == may_rewrite) {
3232 patch_bytecode(Bytecodes::_fast_zputfield, bc, rbx, true, byte_no);
3233 }
3234 __ jmp(Done);
3235 }
3236
3237 __ bind(notBool);
3238 __ cmpl(flags, atos);
3239 __ jcc(Assembler::notEqual, notObj);
3240
3241 // atos
3242 {
3243 __ pop(atos);
3244 if (!is_static) pop_and_check_object(obj);
3245 // Store into the field
3246 do_oop_store(_masm, field, rax, _bs->kind(), false);
3247 if (!is_static && rc == may_rewrite) {
3248 patch_bytecode(Bytecodes::_fast_aputfield, bc, rbx, true, byte_no);
3249 }
3250 __ jmp(Done);
3251 }
3252
3253 __ bind(notObj);
3254 __ cmpl(flags, qtos);
3255 __ jcc(Assembler::notEqual, notValueType);
3256
3257 // qtos
3258 {
3259 __ pop(qtos); // => rax == value
3260 if (!is_static) {
3261 // value types in non-static fields are embedded
3262 pop_and_check_object(rbx);
3263 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::qputfield),
3264 rbx, rax, flags2);
3265 __ jmp(notVolatile); // value types are never volatile
3266 } else {
3267 // Store into the static field
3268 // Value types in static fields are currently handled with indirection
3269 // but a copy to the Java heap might be required if the value is currently
3270 // stored in a thread local buffer
3271 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::qputstatic), rax, off, obj);
3272 }
3273 __ jmp(Done);
3274 }
3275
3276 __ bind(notValueType);
3277 __ cmpl(flags, itos);
3278 __ jcc(Assembler::notEqual, notInt);
3279
3280 // itos
3281 {
3282 __ pop(itos);
3283 if (!is_static) pop_and_check_object(obj);
3284 __ movl(field, rax);
3285 if (!is_static && rc == may_rewrite) {
3286 patch_bytecode(Bytecodes::_fast_iputfield, bc, rbx, true, byte_no);
3287 }
3288 __ jmp(Done);
3289 }
3290
3291 __ bind(notInt);
3292 __ cmpl(flags, ctos);
3293 __ jcc(Assembler::notEqual, notChar);
3294
3295 // ctos
3296 {
3297 __ pop(ctos);
3298 if (!is_static) pop_and_check_object(obj);
3299 __ movw(field, rax);
3300 if (!is_static && rc == may_rewrite) {
3301 patch_bytecode(Bytecodes::_fast_cputfield, bc, rbx, true, byte_no);
3302 }
3303 __ jmp(Done);
3304 }
3305
3306 __ bind(notChar);
3307 __ cmpl(flags, stos);
3308 __ jcc(Assembler::notEqual, notShort);
3309
3310 // stos
3311 {
3312 __ pop(stos);
3313 if (!is_static) pop_and_check_object(obj);
3314 __ movw(field, rax);
3315 if (!is_static && rc == may_rewrite) {
3316 patch_bytecode(Bytecodes::_fast_sputfield, bc, rbx, true, byte_no);
3317 }
3318 __ jmp(Done);
3319 }
3320
3321 __ bind(notShort);
3322 __ cmpl(flags, ltos);
3323 __ jcc(Assembler::notEqual, notLong);
3324
3325 // ltos
3326 #ifdef _LP64
3327 {
3328 __ pop(ltos);
3329 if (!is_static) pop_and_check_object(obj);
3330 __ movq(field, rax);
3331 if (!is_static && rc == may_rewrite) {
3332 patch_bytecode(Bytecodes::_fast_lputfield, bc, rbx, true, byte_no);
3333 }
3334 __ jmp(Done);
3335 }
3336 #else
3337 {
3338 Label notVolatileLong;
3339 __ testl(rdx, rdx);
3340 __ jcc(Assembler::zero, notVolatileLong);
3341
3342 __ pop(ltos); // overwrites rdx, do this after testing volatile.
3343 if (!is_static) pop_and_check_object(obj);
3344
3345 // Replace with real volatile test
3346 __ push(rdx);
3347 __ push(rax); // Must update atomically with FIST
3348 __ fild_d(Address(rsp,0)); // So load into FPU register
3349 __ fistp_d(field); // and put into memory atomically
3350 __ addptr(rsp, 2*wordSize);
3351 // volatile_barrier();
3352 volatile_barrier(Assembler::Membar_mask_bits(Assembler::StoreLoad |
3353 Assembler::StoreStore));
3354 // Don't rewrite volatile version
3355 __ jmp(notVolatile);
3356
3357 __ bind(notVolatileLong);
3358
3359 __ pop(ltos); // overwrites rdx
3360 if (!is_static) pop_and_check_object(obj);
3361 __ movptr(hi, rdx);
3362 __ movptr(field, rax);
3363 // Don't rewrite to _fast_lputfield for potential volatile case.
3364 __ jmp(notVolatile);
3365 }
3366 #endif // _LP64
3367
3368 __ bind(notLong);
3369 __ cmpl(flags, ftos);
3370 __ jcc(Assembler::notEqual, notFloat);
3371
3372 // ftos
3373 {
3374 __ pop(ftos);
3375 if (!is_static) pop_and_check_object(obj);
3376 __ store_float(field);
3377 if (!is_static && rc == may_rewrite) {
3378 patch_bytecode(Bytecodes::_fast_fputfield, bc, rbx, true, byte_no);
3379 }
3380 __ jmp(Done);
3381 }
3382
3383 __ bind(notFloat);
3384 #ifdef ASSERT
3385 __ cmpl(flags, dtos);
3386 __ jcc(Assembler::notEqual, notDouble);
3387 #endif
3388
3389 // dtos
3390 {
3391 __ pop(dtos);
3392 if (!is_static) pop_and_check_object(obj);
3393 __ store_double(field);
3394 if (!is_static && rc == may_rewrite) {
3395 patch_bytecode(Bytecodes::_fast_dputfield, bc, rbx, true, byte_no);
3396 }
3397 }
3398
3399 #ifdef ASSERT
3400 __ jmp(Done);
3401
3402 __ bind(notDouble);
3403 __ stop("Bad state");
3404 #endif
3405
3406 __ bind(Done);
3407
3408 __ shrl(flags2, ConstantPoolCacheEntry::is_volatile_shift);
3409 __ andl(flags2, 0x1);
3410
3411 // Check for volatile store
3412 __ testl(flags2, flags2);
3413 __ jcc(Assembler::zero, notVolatile);
3414 volatile_barrier(Assembler::Membar_mask_bits(Assembler::StoreLoad |
3415 Assembler::StoreStore));
3416 __ bind(notVolatile);
3417 }
3418
3419 void TemplateTable::putfield(int byte_no) {
3420 putfield_or_static(byte_no, false);
3421 }
3422
3423 void TemplateTable::nofast_putfield(int byte_no) {
3424 putfield_or_static(byte_no, false, may_not_rewrite);
3425 }
3426
3427 void TemplateTable::putstatic(int byte_no) {
3428 putfield_or_static(byte_no, true);
3429 }
3430
3431 void TemplateTable::jvmti_post_fast_field_mod() {
3432
3433 const Register scratch = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
3434
3435 if (JvmtiExport::can_post_field_modification()) {
3436 // Check to see if a field modification watch has been set before
3437 // we take the time to call into the VM.
3438 Label L2;
3439 __ mov32(scratch, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr()));
3440 __ testl(scratch, scratch);
3441 __ jcc(Assembler::zero, L2);
3442 __ pop_ptr(rbx); // copy the object pointer from tos
3443 __ verify_oop(rbx);
3444 __ push_ptr(rbx); // put the object pointer back on tos
3445 // Save tos values before call_VM() clobbers them. Since we have
3446 // to do it for every data type, we use the saved values as the
3447 // jvalue object.
3448 switch (bytecode()) { // load values into the jvalue object
3449 case Bytecodes::_fast_qputfield: //fall through
3450 case Bytecodes::_fast_aputfield: __ push_ptr(rax); break;
3451 case Bytecodes::_fast_bputfield: // fall through
3452 case Bytecodes::_fast_zputfield: // fall through
3453 case Bytecodes::_fast_sputfield: // fall through
3454 case Bytecodes::_fast_cputfield: // fall through
3455 case Bytecodes::_fast_iputfield: __ push_i(rax); break;
3456 case Bytecodes::_fast_dputfield: __ push(dtos); break;
3457 case Bytecodes::_fast_fputfield: __ push(ftos); break;
3458 case Bytecodes::_fast_lputfield: __ push_l(rax); break;
3459
3460 default:
3461 ShouldNotReachHere();
3462 }
3463 __ mov(scratch, rsp); // points to jvalue on the stack
3464 // access constant pool cache entry
3465 LP64_ONLY(__ get_cache_entry_pointer_at_bcp(c_rarg2, rax, 1));
3466 NOT_LP64(__ get_cache_entry_pointer_at_bcp(rax, rdx, 1));
3467 __ verify_oop(rbx);
3468 // rbx: object pointer copied above
3469 // c_rarg2: cache entry pointer
3470 // c_rarg3: jvalue object on the stack
3471 LP64_ONLY(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_modification), rbx, c_rarg2, c_rarg3));
3472 NOT_LP64(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_modification), rbx, rax, rcx));
3473
3474 switch (bytecode()) { // restore tos values
3475 case Bytecodes::_fast_qputfield: // fall through
3476 case Bytecodes::_fast_aputfield: __ pop_ptr(rax); break;
3477 case Bytecodes::_fast_bputfield: // fall through
3478 case Bytecodes::_fast_zputfield: // fall through
3479 case Bytecodes::_fast_sputfield: // fall through
3480 case Bytecodes::_fast_cputfield: // fall through
3481 case Bytecodes::_fast_iputfield: __ pop_i(rax); break;
3482 case Bytecodes::_fast_dputfield: __ pop(dtos); break;
3483 case Bytecodes::_fast_fputfield: __ pop(ftos); break;
3484 case Bytecodes::_fast_lputfield: __ pop_l(rax); break;
3485 default: break;
3486 }
3487 __ bind(L2);
3488 }
3489 }
3490
3491 void TemplateTable::fast_storefield(TosState state) {
3492 transition(state, vtos);
3493
3494 ByteSize base = ConstantPoolCache::base_offset();
3495
3496 jvmti_post_fast_field_mod();
3497
3498 // access constant pool cache
3499 __ get_cache_and_index_at_bcp(rcx, rbx, 1);
3500
3501 // test for volatile with rdx but rdx is tos register for lputfield.
3502 __ movl(rdx, Address(rcx, rbx, Address::times_ptr,
3503 in_bytes(base +
3504 ConstantPoolCacheEntry::flags_offset())));
3505
3506 // replace index with field offset from cache entry
3507 __ movptr(rbx, Address(rcx, rbx, Address::times_ptr,
3508 in_bytes(base + ConstantPoolCacheEntry::f2_offset())));
3509
3510 // [jk] not needed currently
3511 // volatile_barrier(Assembler::Membar_mask_bits(Assembler::LoadStore |
3512 // Assembler::StoreStore));
3513
3514 Label notVolatile;
3515 __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift);
3516 __ andl(rdx, 0x1);
3517
3518 // Get object from stack
3519 pop_and_check_object(rcx);
3520
3521 // field address
3522 const Address field(rcx, rbx, Address::times_1);
3523
3524 // access field
3525 switch (bytecode()) {
3526 case Bytecodes::_fast_qputfield:
3527 __ stop("should not be rewritten yet");
3528 break;
3529 case Bytecodes::_fast_aputfield:
3530 do_oop_store(_masm, field, rax, _bs->kind(), false);
3531 break;
3532 case Bytecodes::_fast_lputfield:
3533 #ifdef _LP64
3534 __ movq(field, rax);
3535 #else
3536 __ stop("should not be rewritten");
3537 #endif
3538 break;
3539 case Bytecodes::_fast_iputfield:
3540 __ movl(field, rax);
3541 break;
3542 case Bytecodes::_fast_zputfield:
3543 __ andl(rax, 0x1); // boolean is true if LSB is 1
3544 // fall through to bputfield
3545 case Bytecodes::_fast_bputfield:
3546 __ movb(field, rax);
3547 break;
3548 case Bytecodes::_fast_sputfield:
3549 // fall through
3550 case Bytecodes::_fast_cputfield:
3551 __ movw(field, rax);
3552 break;
3553 case Bytecodes::_fast_fputfield:
3554 __ store_float(field);
3555 break;
3556 case Bytecodes::_fast_dputfield:
3557 __ store_double(field);
3558 break;
3559 default:
3560 ShouldNotReachHere();
3561 }
3562
3563 // Check for volatile store
3564 __ testl(rdx, rdx);
3565 __ jcc(Assembler::zero, notVolatile);
3566 volatile_barrier(Assembler::Membar_mask_bits(Assembler::StoreLoad |
3567 Assembler::StoreStore));
3568 __ bind(notVolatile);
3569 }
3570
3571 void TemplateTable::fast_accessfield(TosState state) {
3572 transition(atos, state);
3573
3574 // Do the JVMTI work here to avoid disturbing the register state below
3575 if (JvmtiExport::can_post_field_access()) {
3576 // Check to see if a field access watch has been set before we
3577 // take the time to call into the VM.
3578 Label L1;
3579 __ mov32(rcx, ExternalAddress((address) JvmtiExport::get_field_access_count_addr()));
3580 __ testl(rcx, rcx);
3581 __ jcc(Assembler::zero, L1);
3582 // access constant pool cache entry
3583 LP64_ONLY(__ get_cache_entry_pointer_at_bcp(c_rarg2, rcx, 1));
3584 NOT_LP64(__ get_cache_entry_pointer_at_bcp(rcx, rdx, 1));
3585 __ verify_oop(rax);
3586 __ push_ptr(rax); // save object pointer before call_VM() clobbers it
3587 LP64_ONLY(__ mov(c_rarg1, rax));
3588 // c_rarg1: object pointer copied above
3589 // c_rarg2: cache entry pointer
3590 LP64_ONLY(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access), c_rarg1, c_rarg2));
3591 NOT_LP64(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access), rax, rcx));
3592 __ pop_ptr(rax); // restore object pointer
3593 __ bind(L1);
3594 }
3595
3596 // access constant pool cache
3597 __ get_cache_and_index_at_bcp(rcx, rbx, 1);
3598 // replace index with field offset from cache entry
3599 // [jk] not needed currently
3600 // if (os::is_MP()) {
3601 // __ movl(rdx, Address(rcx, rbx, Address::times_8,
3602 // in_bytes(ConstantPoolCache::base_offset() +
3603 // ConstantPoolCacheEntry::flags_offset())));
3604 // __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift);
3605 // __ andl(rdx, 0x1);
3606 // }
3607 __ movptr(rbx, Address(rcx, rbx, Address::times_ptr,
3608 in_bytes(ConstantPoolCache::base_offset() +
3609 ConstantPoolCacheEntry::f2_offset())));
3610
3611 // rax: object
3612 __ verify_oop(rax);
3613 __ null_check(rax);
3614 Address field(rax, rbx, Address::times_1);
3615
3616 // access field
3617 switch (bytecode()) {
3618 case Bytecodes::_fast_qgetfield:
3619 __ stop("should not be rewritten yet");
3620 break;
3621 case Bytecodes::_fast_agetfield:
3622 __ load_heap_oop(rax, field);
3623 __ verify_oop(rax);
3624 break;
3625 case Bytecodes::_fast_lgetfield:
3626 #ifdef _LP64
3627 __ movq(rax, field);
3628 #else
3629 __ stop("should not be rewritten");
3630 #endif
3631 break;
3632 case Bytecodes::_fast_igetfield:
3633 __ movl(rax, field);
3634 break;
3635 case Bytecodes::_fast_bgetfield:
3636 __ movsbl(rax, field);
3637 break;
3638 case Bytecodes::_fast_sgetfield:
3639 __ load_signed_short(rax, field);
3640 break;
3641 case Bytecodes::_fast_cgetfield:
3642 __ load_unsigned_short(rax, field);
3643 break;
3644 case Bytecodes::_fast_fgetfield:
3645 __ load_float(field);
3646 break;
3647 case Bytecodes::_fast_dgetfield:
3648 __ load_double(field);
3649 break;
3650 default:
3651 ShouldNotReachHere();
3652 }
3653 // [jk] not needed currently
3654 // if (os::is_MP()) {
3655 // Label notVolatile;
3656 // __ testl(rdx, rdx);
3657 // __ jcc(Assembler::zero, notVolatile);
3658 // __ membar(Assembler::LoadLoad);
3659 // __ bind(notVolatile);
3660 //};
3661 }
3662
3663 void TemplateTable::fast_xaccess(TosState state) {
3664 transition(vtos, state);
3665
3666 // get receiver
3667 __ movptr(rax, aaddress(0));
3668 // access constant pool cache
3669 __ get_cache_and_index_at_bcp(rcx, rdx, 2);
3670 __ movptr(rbx,
3671 Address(rcx, rdx, Address::times_ptr,
3672 in_bytes(ConstantPoolCache::base_offset() +
3673 ConstantPoolCacheEntry::f2_offset())));
3674 // make sure exception is reported in correct bcp range (getfield is
3675 // next instruction)
3676 __ increment(rbcp);
3677 __ null_check(rax);
3678 const Address field = Address(rax, rbx, Address::times_1, 0*wordSize);
3679 switch (state) {
3680 case itos:
3681 __ movl(rax, field);
3682 break;
3683 case atos:
3684 __ load_heap_oop(rax, field);
3685 __ verify_oop(rax);
3686 break;
3687 case ftos:
3688 __ load_float(field);
3689 break;
3690 default:
3691 ShouldNotReachHere();
3692 }
3693
3694 // [jk] not needed currently
3695 // if (os::is_MP()) {
3696 // Label notVolatile;
3697 // __ movl(rdx, Address(rcx, rdx, Address::times_8,
3698 // in_bytes(ConstantPoolCache::base_offset() +
3699 // ConstantPoolCacheEntry::flags_offset())));
3700 // __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift);
3701 // __ testl(rdx, 0x1);
3702 // __ jcc(Assembler::zero, notVolatile);
3703 // __ membar(Assembler::LoadLoad);
3704 // __ bind(notVolatile);
3705 // }
3706
3707 __ decrement(rbcp);
3708 }
3709
3710 //-----------------------------------------------------------------------------
3711 // Calls
3712
3713 void TemplateTable::count_calls(Register method, Register temp) {
3714 // implemented elsewhere
3715 ShouldNotReachHere();
3716 }
3717
3718 void TemplateTable::prepare_invoke(int byte_no,
3719 Register method, // linked method (or i-klass)
3720 Register index, // itable index, MethodType, etc.
3721 Register recv, // if caller wants to see it
3722 Register flags // if caller wants to test it
3723 ) {
3724 // determine flags
3725 const Bytecodes::Code code = bytecode();
3726 const bool is_invokeinterface = code == Bytecodes::_invokeinterface;
3727 const bool is_invokedynamic = code == Bytecodes::_invokedynamic;
3728 const bool is_invokehandle = code == Bytecodes::_invokehandle;
3729 const bool is_invokevirtual = code == Bytecodes::_invokevirtual;
3730 const bool is_invokespecial = code == Bytecodes::_invokespecial;
3731 const bool load_receiver = (recv != noreg);
3732 const bool save_flags = (flags != noreg);
3733 assert(load_receiver == (code != Bytecodes::_invokestatic && code != Bytecodes::_invokedynamic), "");
3734 assert(save_flags == (is_invokeinterface || is_invokevirtual), "need flags for vfinal");
3735 assert(flags == noreg || flags == rdx, "");
3736 assert(recv == noreg || recv == rcx, "");
3737
3738 // setup registers & access constant pool cache
3739 if (recv == noreg) recv = rcx;
3740 if (flags == noreg) flags = rdx;
3741 assert_different_registers(method, index, recv, flags);
3742
3743 // save 'interpreter return address'
3744 __ save_bcp();
3745
3746 load_invoke_cp_cache_entry(byte_no, method, index, flags, is_invokevirtual, false, is_invokedynamic);
3747
3748 // maybe push appendix to arguments (just before return address)
3749 if (is_invokedynamic || is_invokehandle) {
3750 Label L_no_push;
3751 __ testl(flags, (1 << ConstantPoolCacheEntry::has_appendix_shift));
3752 __ jcc(Assembler::zero, L_no_push);
3753 // Push the appendix as a trailing parameter.
3754 // This must be done before we get the receiver,
3755 // since the parameter_size includes it.
3756 __ push(rbx);
3757 __ mov(rbx, index);
3758 assert(ConstantPoolCacheEntry::_indy_resolved_references_appendix_offset == 0, "appendix expected at index+0");
3759 __ load_resolved_reference_at_index(index, rbx);
3760 __ pop(rbx);
3761 __ push(index); // push appendix (MethodType, CallSite, etc.)
3762 __ bind(L_no_push);
3763 }
3764
3765 // load receiver if needed (after appendix is pushed so parameter size is correct)
3766 // Note: no return address pushed yet
3767 if (load_receiver) {
3768 __ movl(recv, flags);
3769 __ andl(recv, ConstantPoolCacheEntry::parameter_size_mask);
3770 const int no_return_pc_pushed_yet = -1; // argument slot correction before we push return address
3771 const int receiver_is_at_end = -1; // back off one slot to get receiver
3772 Address recv_addr = __ argument_address(recv, no_return_pc_pushed_yet + receiver_is_at_end);
3773 __ movptr(recv, recv_addr);
3774 __ verify_oop(recv);
3775 }
3776
3777 if (save_flags) {
3778 __ movl(rbcp, flags);
3779 }
3780
3781 // compute return type
3782 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift);
3783 // Make sure we don't need to mask flags after the above shift
3784 ConstantPoolCacheEntry::verify_tos_state_shift();
3785 // load return address
3786 {
3787 const address table_addr = (address) Interpreter::invoke_return_entry_table_for(code);
3788 ExternalAddress table(table_addr);
3789 LP64_ONLY(__ lea(rscratch1, table));
3790 LP64_ONLY(__ movptr(flags, Address(rscratch1, flags, Address::times_ptr)));
3791 NOT_LP64(__ movptr(flags, ArrayAddress(table, Address(noreg, flags, Address::times_ptr))));
3792 }
3793
3794 // push return address
3795 __ push(flags);
3796
3797 // Restore flags value from the constant pool cache, and restore rsi
3798 // for later null checks. r13 is the bytecode pointer
3799 if (save_flags) {
3800 __ movl(flags, rbcp);
3801 __ restore_bcp();
3802 }
3803 }
3804
3805 void TemplateTable::invokevirtual_helper(Register index,
3806 Register recv,
3807 Register flags) {
3808 // Uses temporary registers rax, rdx
3809 assert_different_registers(index, recv, rax, rdx);
3810 assert(index == rbx, "");
3811 assert(recv == rcx, "");
3812
3813 // Test for an invoke of a final method
3814 Label notFinal;
3815 __ movl(rax, flags);
3816 __ andl(rax, (1 << ConstantPoolCacheEntry::is_vfinal_shift));
3817 __ jcc(Assembler::zero, notFinal);
3818
3819 const Register method = index; // method must be rbx
3820 assert(method == rbx,
3821 "Method* must be rbx for interpreter calling convention");
3822
3823 // do the call - the index is actually the method to call
3824 // that is, f2 is a vtable index if !is_vfinal, else f2 is a Method*
3825
3826 // It's final, need a null check here!
3827 __ null_check(recv);
3828
3829 // profile this call
3830 __ profile_final_call(rax);
3831 __ profile_arguments_type(rax, method, rbcp, true);
3832
3833 __ jump_from_interpreted(method, rax);
3834
3835 __ bind(notFinal);
3836
3837 // get receiver klass
3838 __ null_check(recv, oopDesc::klass_offset_in_bytes());
3839 __ load_klass(rax, recv);
3840
3841 // profile this call
3842 __ profile_virtual_call(rax, rlocals, rdx);
3843 // get target Method* & entry point
3844 __ lookup_virtual_method(rax, index, method);
3845 __ profile_called_method(method, rdx, rbcp);
3846
3847 __ profile_arguments_type(rdx, method, rbcp, true);
3848 __ jump_from_interpreted(method, rdx);
3849 }
3850
3851 void TemplateTable::invokevirtual(int byte_no) {
3852 transition(vtos, vtos);
3853 assert(byte_no == f2_byte, "use this argument");
3854 prepare_invoke(byte_no,
3855 rbx, // method or vtable index
3856 noreg, // unused itable index
3857 rcx, rdx); // recv, flags
3858
3859 // rbx: index
3860 // rcx: receiver
3861 // rdx: flags
3862
3863 invokevirtual_helper(rbx, rcx, rdx);
3864 }
3865
3866 void TemplateTable::invokespecial(int byte_no) {
3867 transition(vtos, vtos);
3868 assert(byte_no == f1_byte, "use this argument");
3869 prepare_invoke(byte_no, rbx, noreg, // get f1 Method*
3870 rcx); // get receiver also for null check
3871 __ verify_oop(rcx);
3872 __ null_check(rcx);
3873 // do the call
3874 __ profile_call(rax);
3875 __ profile_arguments_type(rax, rbx, rbcp, false);
3876 __ jump_from_interpreted(rbx, rax);
3877 }
3878
3879 void TemplateTable::invokestatic(int byte_no) {
3880 transition(vtos, vtos);
3881 assert(byte_no == f1_byte, "use this argument");
3882 prepare_invoke(byte_no, rbx); // get f1 Method*
3883 // do the call
3884 __ profile_call(rax);
3885 __ profile_arguments_type(rax, rbx, rbcp, false);
3886 __ jump_from_interpreted(rbx, rax);
3887 }
3888
3889
3890 void TemplateTable::fast_invokevfinal(int byte_no) {
3891 transition(vtos, vtos);
3892 assert(byte_no == f2_byte, "use this argument");
3893 __ stop("fast_invokevfinal not used on x86");
3894 }
3895
3896
3897 void TemplateTable::invokeinterface(int byte_no) {
3898 transition(vtos, vtos);
3899 assert(byte_no == f1_byte, "use this argument");
3900 prepare_invoke(byte_no, rax, rbx, // get f1 Klass*, f2 itable index
3901 rcx, rdx); // recv, flags
3902
3903 // rax: interface klass (from f1)
3904 // rbx: itable index (from f2)
3905 // rcx: receiver
3906 // rdx: flags
3907
3908 // Special case of invokeinterface called for virtual method of
3909 // java.lang.Object. See cpCacheOop.cpp for details.
3910 // This code isn't produced by javac, but could be produced by
3911 // another compliant java compiler.
3912 Label notMethod;
3913 __ movl(rlocals, rdx);
3914 __ andl(rlocals, (1 << ConstantPoolCacheEntry::is_forced_virtual_shift));
3915
3916 __ jcc(Assembler::zero, notMethod);
3917
3918 invokevirtual_helper(rbx, rcx, rdx);
3919 __ bind(notMethod);
3920
3921 // Get receiver klass into rdx - also a null check
3922 __ restore_locals(); // restore r14
3923 __ null_check(rcx, oopDesc::klass_offset_in_bytes());
3924 __ load_klass(rdx, rcx);
3925
3926 // profile this call
3927 __ profile_virtual_call(rdx, rbcp, rlocals);
3928
3929 Label no_such_interface, no_such_method;
3930
3931 __ lookup_interface_method(// inputs: rec. class, interface, itable index
3932 rdx, rax, rbx,
3933 // outputs: method, scan temp. reg
3934 rbx, rbcp,
3935 no_such_interface);
3936
3937 // rbx: Method* to call
3938 // rcx: receiver
3939 // Check for abstract method error
3940 // Note: This should be done more efficiently via a throw_abstract_method_error
3941 // interpreter entry point and a conditional jump to it in case of a null
3942 // method.
3943 __ testptr(rbx, rbx);
3944 __ jcc(Assembler::zero, no_such_method);
3945
3946 __ profile_called_method(rbx, rbcp, rdx);
3947 __ profile_arguments_type(rdx, rbx, rbcp, true);
3948
3949 // do the call
3950 // rcx: receiver
3951 // rbx,: Method*
3952 __ jump_from_interpreted(rbx, rdx);
3953 __ should_not_reach_here();
3954
3955 // exception handling code follows...
3956 // note: must restore interpreter registers to canonical
3957 // state for exception handling to work correctly!
3958
3959 __ bind(no_such_method);
3960 // throw exception
3961 __ pop(rbx); // pop return address (pushed by prepare_invoke)
3962 __ restore_bcp(); // rbcp must be correct for exception handler (was destroyed)
3963 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
3964 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodError));
3965 // the call_VM checks for exception, so we should never return here.
3966 __ should_not_reach_here();
3967
3968 __ bind(no_such_interface);
3969 // throw exception
3970 __ pop(rbx); // pop return address (pushed by prepare_invoke)
3971 __ restore_bcp(); // rbcp must be correct for exception handler (was destroyed)
3972 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
3973 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
3974 InterpreterRuntime::throw_IncompatibleClassChangeError));
3975 // the call_VM checks for exception, so we should never return here.
3976 __ should_not_reach_here();
3977 }
3978
3979 void TemplateTable::invokehandle(int byte_no) {
3980 transition(vtos, vtos);
3981 assert(byte_no == f1_byte, "use this argument");
3982 const Register rbx_method = rbx;
3983 const Register rax_mtype = rax;
3984 const Register rcx_recv = rcx;
3985 const Register rdx_flags = rdx;
3986
3987 prepare_invoke(byte_no, rbx_method, rax_mtype, rcx_recv);
3988 __ verify_method_ptr(rbx_method);
3989 __ verify_oop(rcx_recv);
3990 __ null_check(rcx_recv);
3991
3992 // rax: MethodType object (from cpool->resolved_references[f1], if necessary)
3993 // rbx: MH.invokeExact_MT method (from f2)
3994
3995 // Note: rax_mtype is already pushed (if necessary) by prepare_invoke
3996
3997 // FIXME: profile the LambdaForm also
3998 __ profile_final_call(rax);
3999 __ profile_arguments_type(rdx, rbx_method, rbcp, true);
4000
4001 __ jump_from_interpreted(rbx_method, rdx);
4002 }
4003
4004 void TemplateTable::invokedynamic(int byte_no) {
4005 transition(vtos, vtos);
4006 assert(byte_no == f1_byte, "use this argument");
4007
4008 const Register rbx_method = rbx;
4009 const Register rax_callsite = rax;
4010
4011 prepare_invoke(byte_no, rbx_method, rax_callsite);
4012
4013 // rax: CallSite object (from cpool->resolved_references[f1])
4014 // rbx: MH.linkToCallSite method (from f2)
4015
4016 // Note: rax_callsite is already pushed by prepare_invoke
4017
4018 // %%% should make a type profile for any invokedynamic that takes a ref argument
4019 // profile this call
4020 __ profile_call(rbcp);
4021 __ profile_arguments_type(rdx, rbx_method, rbcp, false);
4022
4023 __ verify_oop(rax_callsite);
4024
4025 __ jump_from_interpreted(rbx_method, rdx);
4026 }
4027
4028 //-----------------------------------------------------------------------------
4029 // Allocation
4030
4031 void TemplateTable::_new() {
4032 transition(vtos, atos);
4033 __ get_unsigned_2_byte_index_at_bcp(rdx, 1);
4034 Label slow_case;
4035 Label slow_case_no_pop;
4036 Label done;
4037 Label initialize_header;
4038 Label initialize_object; // including clearing the fields
4039 Label allocate_shared;
4040
4041 __ get_cpool_and_tags(rcx, rax);
4042
4043 // Make sure the class we're about to instantiate has been resolved.
4044 // This is done before loading InstanceKlass to be consistent with the order
4045 // how Constant Pool is updated (see ConstantPool::klass_at_put)
4046 const int tags_offset = Array<u1>::base_offset_in_bytes();
4047 __ cmpb(Address(rax, rdx, Address::times_1, tags_offset), JVM_CONSTANT_Class);
4048 __ jcc(Assembler::notEqual, slow_case_no_pop);
4049
4050 // get InstanceKlass
4051 __ load_resolved_klass_at_index(rcx, rdx, rcx);
4052 __ push(rcx); // save the contexts of klass for initializing the header
4053
4054 // make sure klass is initialized & doesn't have finalizer
4055 // make sure klass is fully initialized
4056 __ cmpb(Address(rcx, InstanceKlass::init_state_offset()), InstanceKlass::fully_initialized);
4057 __ jcc(Assembler::notEqual, slow_case);
4058
4059 // get instance_size in InstanceKlass (scaled to a count of bytes)
4060 __ movl(rdx, Address(rcx, Klass::layout_helper_offset()));
4061 // test to see if it has a finalizer or is malformed in some way
4062 __ testl(rdx, Klass::_lh_instance_slow_path_bit);
4063 __ jcc(Assembler::notZero, slow_case);
4064
4065 //
4066 // Allocate the instance
4067 // 1) Try to allocate in the TLAB
4068 // 2) if fail and the object is large allocate in the shared Eden
4069 // 3) if the above fails (or is not applicable), go to a slow case
4070 // (creates a new TLAB, etc.)
4071
4072 const bool allow_shared_alloc =
4073 Universe::heap()->supports_inline_contig_alloc();
4074
4075 const Register thread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
4076 #ifndef _LP64
4077 if (UseTLAB || allow_shared_alloc) {
4078 __ get_thread(thread);
4079 }
4080 #endif // _LP64
4081
4082 if (UseTLAB) {
4083 __ movptr(rax, Address(thread, in_bytes(JavaThread::tlab_top_offset())));
4084 __ lea(rbx, Address(rax, rdx, Address::times_1));
4085 __ cmpptr(rbx, Address(thread, in_bytes(JavaThread::tlab_end_offset())));
4086 __ jcc(Assembler::above, allow_shared_alloc ? allocate_shared : slow_case);
4087 __ movptr(Address(thread, in_bytes(JavaThread::tlab_top_offset())), rbx);
4088 if (ZeroTLAB) {
4089 // the fields have been already cleared
4090 __ jmp(initialize_header);
4091 } else {
4092 // initialize both the header and fields
4093 __ jmp(initialize_object);
4094 }
4095 }
4096
4097 // Allocation in the shared Eden, if allowed.
4098 //
4099 // rdx: instance size in bytes
4100 if (allow_shared_alloc) {
4101 __ bind(allocate_shared);
4102
4103 ExternalAddress heap_top((address)Universe::heap()->top_addr());
4104 ExternalAddress heap_end((address)Universe::heap()->end_addr());
4105
4106 Label retry;
4107 __ bind(retry);
4108 __ movptr(rax, heap_top);
4109 __ lea(rbx, Address(rax, rdx, Address::times_1));
4110 __ cmpptr(rbx, heap_end);
4111 __ jcc(Assembler::above, slow_case);
4112
4113 // Compare rax, with the top addr, and if still equal, store the new
4114 // top addr in rbx, at the address of the top addr pointer. Sets ZF if was
4115 // equal, and clears it otherwise. Use lock prefix for atomicity on MPs.
4116 //
4117 // rax,: object begin
4118 // rbx,: object end
4119 // rdx: instance size in bytes
4120 __ locked_cmpxchgptr(rbx, heap_top);
4121
4122 // if someone beat us on the allocation, try again, otherwise continue
4123 __ jcc(Assembler::notEqual, retry);
4124
4125 __ incr_allocated_bytes(thread, rdx, 0);
4126 }
4127
4128 if (UseTLAB || Universe::heap()->supports_inline_contig_alloc()) {
4129 // The object is initialized before the header. If the object size is
4130 // zero, go directly to the header initialization.
4131 __ bind(initialize_object);
4132 __ decrement(rdx, sizeof(oopDesc));
4133 __ jcc(Assembler::zero, initialize_header);
4134
4135 // Initialize topmost object field, divide rdx by 8, check if odd and
4136 // test if zero.
4137 __ xorl(rcx, rcx); // use zero reg to clear memory (shorter code)
4138 __ shrl(rdx, LogBytesPerLong); // divide by 2*oopSize and set carry flag if odd
4139
4140 // rdx must have been multiple of 8
4141 #ifdef ASSERT
4142 // make sure rdx was multiple of 8
4143 Label L;
4144 // Ignore partial flag stall after shrl() since it is debug VM
4145 __ jccb(Assembler::carryClear, L);
4146 __ stop("object size is not multiple of 2 - adjust this code");
4147 __ bind(L);
4148 // rdx must be > 0, no extra check needed here
4149 #endif
4150
4151 // initialize remaining object fields: rdx was a multiple of 8
4152 { Label loop;
4153 __ bind(loop);
4154 __ movptr(Address(rax, rdx, Address::times_8, sizeof(oopDesc) - 1*oopSize), rcx);
4155 NOT_LP64(__ movptr(Address(rax, rdx, Address::times_8, sizeof(oopDesc) - 2*oopSize), rcx));
4156 __ decrement(rdx);
4157 __ jcc(Assembler::notZero, loop);
4158 }
4159
4160 // initialize object header only.
4161 __ bind(initialize_header);
4162 if (UseBiasedLocking) {
4163 __ pop(rcx); // get saved klass back in the register.
4164 __ movptr(rbx, Address(rcx, Klass::prototype_header_offset()));
4165 __ movptr(Address(rax, oopDesc::mark_offset_in_bytes ()), rbx);
4166 } else {
4167 __ movptr(Address(rax, oopDesc::mark_offset_in_bytes ()),
4168 (intptr_t)markOopDesc::prototype()); // header
4169 __ pop(rcx); // get saved klass back in the register.
4170 }
4171 #ifdef _LP64
4172 __ xorl(rsi, rsi); // use zero reg to clear memory (shorter code)
4173 __ store_klass_gap(rax, rsi); // zero klass gap for compressed oops
4174 #endif
4175 __ store_klass(rax, rcx); // klass
4176
4177 {
4178 SkipIfEqual skip_if(_masm, &DTraceAllocProbes, 0);
4179 // Trigger dtrace event for fastpath
4180 __ push(atos);
4181 __ call_VM_leaf(
4182 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc), rax);
4183 __ pop(atos);
4184 }
4185
4186 __ jmp(done);
4187 }
4188
4189 // slow case
4190 __ bind(slow_case);
4191 __ pop(rcx); // restore stack pointer to what it was when we came in.
4192 __ bind(slow_case_no_pop);
4193
4194 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rax);
4195 Register rarg2 = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
4196
4197 __ get_constant_pool(rarg1);
4198 __ get_unsigned_2_byte_index_at_bcp(rarg2, 1);
4199 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::_new), rarg1, rarg2);
4200 __ verify_oop(rax);
4201
4202 // continue
4203 __ bind(done);
4204 }
4205
4206 void TemplateTable::vdefault() {
4207 transition(vtos, qtos);
4208
4209 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
4210 Register rarg2 = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
4211
4212 __ get_unsigned_2_byte_index_at_bcp(rarg2, 1);
4213 __ get_constant_pool(rarg1);
4214
4215 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::vdefault),
4216 rarg1, rarg2);
4217 __ verify_oop(rax);
4218 }
4219
4220 void TemplateTable::newarray() {
4221 transition(itos, atos);
4222 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
4223 __ load_unsigned_byte(rarg1, at_bcp(1));
4224 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::newarray),
4225 rarg1, rax);
4226 }
4227
4228 void TemplateTable::anewarray() {
4229 transition(itos, atos);
4230
4231 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
4232 Register rarg2 = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
4233
4234 __ get_unsigned_2_byte_index_at_bcp(rarg2, 1);
4235 __ get_constant_pool(rarg1);
4236 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::anewarray),
4237 rarg1, rarg2, rax);
4238 }
4239
4240 void TemplateTable::arraylength() {
4241 transition(atos, itos);
4242 __ null_check(rax, arrayOopDesc::length_offset_in_bytes());
4243 __ movl(rax, Address(rax, arrayOopDesc::length_offset_in_bytes()));
4244 }
4245
4246 void TemplateTable::checkcast() {
4247 transition(atos, atos);
4248 Label done, is_null, ok_is_subtype, quicked, resolved;
4249 __ testptr(rax, rax); // object is in rax
4250 __ jcc(Assembler::zero, is_null);
4251
4252 // Get cpool & tags index
4253 __ get_cpool_and_tags(rcx, rdx); // rcx=cpool, rdx=tags array
4254 __ get_unsigned_2_byte_index_at_bcp(rbx, 1); // rbx=index
4255 // See if bytecode has already been quicked
4256 __ cmpb(Address(rdx, rbx,
4257 Address::times_1,
4258 Array<u1>::base_offset_in_bytes()),
4259 JVM_CONSTANT_Class);
4260 __ jcc(Assembler::equal, quicked);
4261 __ push(atos); // save receiver for result, and for GC
4262 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc));
4263
4264 // vm_result_2 has metadata result
4265 #ifndef _LP64
4266 // borrow rdi from locals
4267 __ get_thread(rdi);
4268 __ get_vm_result_2(rax, rdi);
4269 __ restore_locals();
4270 #else
4271 __ get_vm_result_2(rax, r15_thread);
4272 #endif
4273
4274 __ pop_ptr(rdx); // restore receiver
4275 __ jmpb(resolved);
4276
4277 // Get superklass in rax and subklass in rbx
4278 __ bind(quicked);
4279 __ mov(rdx, rax); // Save object in rdx; rax needed for subtype check
4280 __ load_resolved_klass_at_index(rcx, rbx, rax);
4281
4282 __ bind(resolved);
4283 __ load_klass(rbx, rdx);
4284
4285 // Generate subtype check. Blows rcx, rdi. Object in rdx.
4286 // Superklass in rax. Subklass in rbx.
4287 __ gen_subtype_check(rbx, ok_is_subtype);
4288
4289 // Come here on failure
4290 __ push_ptr(rdx);
4291 // object is at TOS
4292 __ jump(ExternalAddress(Interpreter::_throw_ClassCastException_entry));
4293
4294 // Come here on success
4295 __ bind(ok_is_subtype);
4296 __ mov(rax, rdx); // Restore object in rdx
4297
4298 // Collect counts on whether this check-cast sees NULLs a lot or not.
4299 if (ProfileInterpreter) {
4300 __ jmp(done);
4301 __ bind(is_null);
4302 __ profile_null_seen(rcx);
4303 } else {
4304 __ bind(is_null); // same as 'done'
4305 }
4306 __ bind(done);
4307 }
4308
4309 void TemplateTable::instanceof() {
4310 transition(atos, itos);
4311 Label done, is_null, ok_is_subtype, quicked, resolved;
4312 __ testptr(rax, rax);
4313 __ jcc(Assembler::zero, is_null);
4314
4315 // Get cpool & tags index
4316 __ get_cpool_and_tags(rcx, rdx); // rcx=cpool, rdx=tags array
4317 __ get_unsigned_2_byte_index_at_bcp(rbx, 1); // rbx=index
4318 // See if bytecode has already been quicked
4319 __ cmpb(Address(rdx, rbx,
4320 Address::times_1,
4321 Array<u1>::base_offset_in_bytes()),
4322 JVM_CONSTANT_Class);
4323 __ jcc(Assembler::equal, quicked);
4324
4325 __ push(atos); // save receiver for result, and for GC
4326 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc));
4327 // vm_result_2 has metadata result
4328
4329 #ifndef _LP64
4330 // borrow rdi from locals
4331 __ get_thread(rdi);
4332 __ get_vm_result_2(rax, rdi);
4333 __ restore_locals();
4334 #else
4335 __ get_vm_result_2(rax, r15_thread);
4336 #endif
4337
4338 __ pop_ptr(rdx); // restore receiver
4339 __ verify_oop(rdx);
4340 __ load_klass(rdx, rdx);
4341 __ jmpb(resolved);
4342
4343 // Get superklass in rax and subklass in rdx
4344 __ bind(quicked);
4345 __ load_klass(rdx, rax);
4346 __ load_resolved_klass_at_index(rcx, rbx, rax);
4347
4348 __ bind(resolved);
4349
4350 // Generate subtype check. Blows rcx, rdi
4351 // Superklass in rax. Subklass in rdx.
4352 __ gen_subtype_check(rdx, ok_is_subtype);
4353
4354 // Come here on failure
4355 __ xorl(rax, rax);
4356 __ jmpb(done);
4357 // Come here on success
4358 __ bind(ok_is_subtype);
4359 __ movl(rax, 1);
4360
4361 // Collect counts on whether this test sees NULLs a lot or not.
4362 if (ProfileInterpreter) {
4363 __ jmp(done);
4364 __ bind(is_null);
4365 __ profile_null_seen(rcx);
4366 } else {
4367 __ bind(is_null); // same as 'done'
4368 }
4369 __ bind(done);
4370 // rax = 0: obj == NULL or obj is not an instanceof the specified klass
4371 // rax = 1: obj != NULL and obj is an instanceof the specified klass
4372 }
4373
4374 void TemplateTable::_vbox() {
4375 transition(qtos, atos);
4376
4377 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
4378 Register rarg2 = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
4379
4380 __ get_unsigned_2_byte_index_at_bcp(rarg2, 1);
4381 __ get_constant_pool(rarg1);
4382 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::vbox),
4383 rarg1, rarg2, rax);
4384 }
4385
4386 void TemplateTable::_vunbox() {
4387 transition(atos, qtos);
4388
4389 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
4390 Register rarg2 = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
4391
4392 __ get_unsigned_2_byte_index_at_bcp(rarg2, 1);
4393 __ get_constant_pool(rarg1);
4394 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::vunbox),
4395 rarg1, rarg2, rax);
4396 }
4397
4398 //----------------------------------------------------------------------------------------------------
4399 // Breakpoints
4400 void TemplateTable::_breakpoint() {
4401 // Note: We get here even if we are single stepping..
4402 // jbug insists on setting breakpoints at every bytecode
4403 // even if we are in single step mode.
4404
4405 transition(vtos, vtos);
4406
4407 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
4408
4409 // get the unpatched byte code
4410 __ get_method(rarg);
4411 __ call_VM(noreg,
4412 CAST_FROM_FN_PTR(address,
4413 InterpreterRuntime::get_original_bytecode_at),
4414 rarg, rbcp);
4415 __ mov(rbx, rax); // why?
4416
4417 // post the breakpoint event
4418 __ get_method(rarg);
4419 __ call_VM(noreg,
4420 CAST_FROM_FN_PTR(address, InterpreterRuntime::_breakpoint),
4421 rarg, rbcp);
4422
4423 // complete the execution of original bytecode
4424 __ dispatch_only_normal(vtos);
4425 }
4426
4427 //-----------------------------------------------------------------------------
4428 // Exceptions
4429
4430 void TemplateTable::athrow() {
4431 transition(atos, vtos);
4432 __ null_check(rax);
4433 __ jump(ExternalAddress(Interpreter::throw_exception_entry()));
4434 }
4435
4436 //-----------------------------------------------------------------------------
4437 // Synchronization
4438 //
4439 // Note: monitorenter & exit are symmetric routines; which is reflected
4440 // in the assembly code structure as well
4441 //
4442 // Stack layout:
4443 //
4444 // [expressions ] <--- rsp = expression stack top
4445 // ..
4446 // [expressions ]
4447 // [monitor entry] <--- monitor block top = expression stack bot
4448 // ..
4449 // [monitor entry]
4450 // [frame data ] <--- monitor block bot
4451 // ...
4452 // [saved rbp ] <--- rbp
4453 void TemplateTable::monitorenter() {
4454 transition(atos, vtos);
4455
4456 // check for NULL object
4457 __ null_check(rax);
4458
4459 const Address monitor_block_top(
4460 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
4461 const Address monitor_block_bot(
4462 rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
4463 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
4464
4465 Label allocated;
4466
4467 Register rtop = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
4468 Register rbot = LP64_ONLY(c_rarg2) NOT_LP64(rbx);
4469 Register rmon = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
4470
4471 // initialize entry pointer
4472 __ xorl(rmon, rmon); // points to free slot or NULL
4473
4474 // find a free slot in the monitor block (result in rmon)
4475 {
4476 Label entry, loop, exit;
4477 __ movptr(rtop, monitor_block_top); // points to current entry,
4478 // starting with top-most entry
4479 __ lea(rbot, monitor_block_bot); // points to word before bottom
4480 // of monitor block
4481 __ jmpb(entry);
4482
4483 __ bind(loop);
4484 // check if current entry is used
4485 __ cmpptr(Address(rtop, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL_WORD);
4486 // if not used then remember entry in rmon
4487 __ cmovptr(Assembler::equal, rmon, rtop); // cmov => cmovptr
4488 // check if current entry is for same object
4489 __ cmpptr(rax, Address(rtop, BasicObjectLock::obj_offset_in_bytes()));
4490 // if same object then stop searching
4491 __ jccb(Assembler::equal, exit);
4492 // otherwise advance to next entry
4493 __ addptr(rtop, entry_size);
4494 __ bind(entry);
4495 // check if bottom reached
4496 __ cmpptr(rtop, rbot);
4497 // if not at bottom then check this entry
4498 __ jcc(Assembler::notEqual, loop);
4499 __ bind(exit);
4500 }
4501
4502 __ testptr(rmon, rmon); // check if a slot has been found
4503 __ jcc(Assembler::notZero, allocated); // if found, continue with that one
4504
4505 // allocate one if there's no free slot
4506 {
4507 Label entry, loop;
4508 // 1. compute new pointers // rsp: old expression stack top
4509 __ movptr(rmon, monitor_block_bot); // rmon: old expression stack bottom
4510 __ subptr(rsp, entry_size); // move expression stack top
4511 __ subptr(rmon, entry_size); // move expression stack bottom
4512 __ mov(rtop, rsp); // set start value for copy loop
4513 __ movptr(monitor_block_bot, rmon); // set new monitor block bottom
4514 __ jmp(entry);
4515 // 2. move expression stack contents
4516 __ bind(loop);
4517 __ movptr(rbot, Address(rtop, entry_size)); // load expression stack
4518 // word from old location
4519 __ movptr(Address(rtop, 0), rbot); // and store it at new location
4520 __ addptr(rtop, wordSize); // advance to next word
4521 __ bind(entry);
4522 __ cmpptr(rtop, rmon); // check if bottom reached
4523 __ jcc(Assembler::notEqual, loop); // if not at bottom then
4524 // copy next word
4525 }
4526
4527 // call run-time routine
4528 // rmon: points to monitor entry
4529 __ bind(allocated);
4530
4531 // Increment bcp to point to the next bytecode, so exception
4532 // handling for async. exceptions work correctly.
4533 // The object has already been poped from the stack, so the
4534 // expression stack looks correct.
4535 __ increment(rbcp);
4536
4537 // store object
4538 __ movptr(Address(rmon, BasicObjectLock::obj_offset_in_bytes()), rax);
4539 __ lock_object(rmon);
4540
4541 // check to make sure this monitor doesn't cause stack overflow after locking
4542 __ save_bcp(); // in case of exception
4543 __ generate_stack_overflow_check(0);
4544
4545 // The bcp has already been incremented. Just need to dispatch to
4546 // next instruction.
4547 __ dispatch_next(vtos);
4548 }
4549
4550 void TemplateTable::monitorexit() {
4551 transition(atos, vtos);
4552
4553 // check for NULL object
4554 __ null_check(rax);
4555
4556 const Address monitor_block_top(
4557 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
4558 const Address monitor_block_bot(
4559 rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
4560 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
4561
4562 Register rtop = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
4563 Register rbot = LP64_ONLY(c_rarg2) NOT_LP64(rbx);
4564
4565 Label found;
4566
4567 // find matching slot
4568 {
4569 Label entry, loop;
4570 __ movptr(rtop, monitor_block_top); // points to current entry,
4571 // starting with top-most entry
4572 __ lea(rbot, monitor_block_bot); // points to word before bottom
4573 // of monitor block
4574 __ jmpb(entry);
4575
4576 __ bind(loop);
4577 // check if current entry is for same object
4578 __ cmpptr(rax, Address(rtop, BasicObjectLock::obj_offset_in_bytes()));
4579 // if same object then stop searching
4580 __ jcc(Assembler::equal, found);
4581 // otherwise advance to next entry
4582 __ addptr(rtop, entry_size);
4583 __ bind(entry);
4584 // check if bottom reached
4585 __ cmpptr(rtop, rbot);
4586 // if not at bottom then check this entry
4587 __ jcc(Assembler::notEqual, loop);
4588 }
4589
4590 // error handling. Unlocking was not block-structured
4591 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
4592 InterpreterRuntime::throw_illegal_monitor_state_exception));
4593 __ should_not_reach_here();
4594
4595 // call run-time routine
4596 __ bind(found);
4597 __ push_ptr(rax); // make sure object is on stack (contract with oopMaps)
4598 __ unlock_object(rtop);
4599 __ pop_ptr(rax); // discard object
4600 }
4601
4602 // Wide instructions
4603 void TemplateTable::wide() {
4604 transition(vtos, vtos);
4605 __ load_unsigned_byte(rbx, at_bcp(1));
4606 ExternalAddress wtable((address)Interpreter::_wentry_point);
4607 __ jump(ArrayAddress(wtable, Address(noreg, rbx, Address::times_ptr)));
4608 // Note: the rbcp increment step is part of the individual wide bytecode implementations
4609 }
4610
4611 // Multi arrays
4612 void TemplateTable::multianewarray() {
4613 transition(vtos, atos);
4614
4615 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rax);
4616 __ load_unsigned_byte(rax, at_bcp(3)); // get number of dimensions
4617 // last dim is on top of stack; we want address of first one:
4618 // first_addr = last_addr + (ndims - 1) * stackElementSize - 1*wordsize
4619 // the latter wordSize to point to the beginning of the array.
4620 __ lea(rarg, Address(rsp, rax, Interpreter::stackElementScale(), -wordSize));
4621 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::multianewarray), rarg);
4622 __ load_unsigned_byte(rbx, at_bcp(3));
4623 __ lea(rsp, Address(rsp, rbx, Interpreter::stackElementScale())); // get rid of counts
4624 }