1 /*
2 * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2014, Red Hat Inc. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "asm/macroAssembler.inline.hpp"
28 #include "gc/shared/barrierSetAssembler.hpp"
29 #include "interpreter/interpreter.hpp"
30 #include "interpreter/interpreterRuntime.hpp"
31 #include "interpreter/interp_masm.hpp"
32 #include "interpreter/templateTable.hpp"
33 #include "memory/universe.hpp"
34 #include "oops/methodData.hpp"
35 #include "oops/method.hpp"
36 #include "oops/objArrayKlass.hpp"
37 #include "oops/oop.inline.hpp"
38 #include "prims/methodHandles.hpp"
39 #include "runtime/frame.inline.hpp"
40 #include "runtime/sharedRuntime.hpp"
41 #include "runtime/stubRoutines.hpp"
42 #include "runtime/synchronizer.hpp"
43
44 #define __ _masm->
45
46 // Platform-dependent initialization
47
48 void TemplateTable::pd_initialize() {
49 // No aarch64 specific initialization
50 }
51
52 // Address computation: local variables
53
54 static inline Address iaddress(int n) {
55 return Address(rlocals, Interpreter::local_offset_in_bytes(n));
56 }
57
58 static inline Address laddress(int n) {
59 return iaddress(n + 1);
60 }
61
62 static inline Address faddress(int n) {
63 return iaddress(n);
64 }
65
66 static inline Address daddress(int n) {
67 return laddress(n);
68 }
69
70 static inline Address aaddress(int n) {
71 return iaddress(n);
72 }
73
74 static inline Address iaddress(Register r) {
75 return Address(rlocals, r, Address::lsl(3));
76 }
77
78 static inline Address laddress(Register r, Register scratch,
79 InterpreterMacroAssembler* _masm) {
80 __ lea(scratch, Address(rlocals, r, Address::lsl(3)));
81 return Address(scratch, Interpreter::local_offset_in_bytes(1));
82 }
83
84 static inline Address faddress(Register r) {
85 return iaddress(r);
86 }
87
88 static inline Address daddress(Register r, Register scratch,
89 InterpreterMacroAssembler* _masm) {
90 return laddress(r, scratch, _masm);
91 }
92
93 static inline Address aaddress(Register r) {
94 return iaddress(r);
95 }
96
97 static inline Address at_rsp() {
98 return Address(esp, 0);
99 }
100
101 // At top of Java expression stack which may be different than esp(). It
102 // isn't for category 1 objects.
103 static inline Address at_tos () {
104 return Address(esp, Interpreter::expr_offset_in_bytes(0));
105 }
106
107 static inline Address at_tos_p1() {
108 return Address(esp, Interpreter::expr_offset_in_bytes(1));
109 }
110
111 static inline Address at_tos_p2() {
112 return Address(esp, Interpreter::expr_offset_in_bytes(2));
113 }
114
115 static inline Address at_tos_p3() {
116 return Address(esp, Interpreter::expr_offset_in_bytes(3));
117 }
118
119 static inline Address at_tos_p4() {
120 return Address(esp, Interpreter::expr_offset_in_bytes(4));
121 }
122
123 static inline Address at_tos_p5() {
124 return Address(esp, Interpreter::expr_offset_in_bytes(5));
125 }
126
127 // Condition conversion
128 static Assembler::Condition j_not(TemplateTable::Condition cc) {
129 switch (cc) {
130 case TemplateTable::equal : return Assembler::NE;
131 case TemplateTable::not_equal : return Assembler::EQ;
132 case TemplateTable::less : return Assembler::GE;
133 case TemplateTable::less_equal : return Assembler::GT;
134 case TemplateTable::greater : return Assembler::LE;
135 case TemplateTable::greater_equal: return Assembler::LT;
136 }
137 ShouldNotReachHere();
138 return Assembler::EQ;
139 }
140
141
142 // Miscelaneous helper routines
143 // Store an oop (or NULL) at the Address described by obj.
144 // If val == noreg this means store a NULL
145 static void do_oop_store(InterpreterMacroAssembler* _masm,
146 Address dst,
147 Register val,
148 DecoratorSet decorators) {
149 assert(val == noreg || val == r0, "parameter is just for looks");
150 __ store_heap_oop(dst, val, r10, r1, decorators);
151 }
152
153 static void do_oop_load(InterpreterMacroAssembler* _masm,
154 Address src,
155 Register dst,
156 DecoratorSet decorators) {
157 __ load_heap_oop(dst, src, r10, r1, decorators);
158 }
159
160 Address TemplateTable::at_bcp(int offset) {
161 assert(_desc->uses_bcp(), "inconsistent uses_bcp information");
162 return Address(rbcp, offset);
163 }
164
165 void TemplateTable::patch_bytecode(Bytecodes::Code bc, Register bc_reg,
166 Register temp_reg, bool load_bc_into_bc_reg/*=true*/,
167 int byte_no)
168 {
169 if (!RewriteBytecodes) return;
170 Label L_patch_done;
171
172 switch (bc) {
173 case Bytecodes::_fast_qputfield:
174 case Bytecodes::_fast_aputfield:
175 case Bytecodes::_fast_bputfield:
176 case Bytecodes::_fast_zputfield:
177 case Bytecodes::_fast_cputfield:
178 case Bytecodes::_fast_dputfield:
179 case Bytecodes::_fast_fputfield:
180 case Bytecodes::_fast_iputfield:
181 case Bytecodes::_fast_lputfield:
182 case Bytecodes::_fast_sputfield:
183 {
184 // We skip bytecode quickening for putfield instructions when
185 // the put_code written to the constant pool cache is zero.
186 // This is required so that every execution of this instruction
187 // calls out to InterpreterRuntime::resolve_get_put to do
188 // additional, required work.
189 assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range");
190 assert(load_bc_into_bc_reg, "we use bc_reg as temp");
191 __ get_cache_and_index_and_bytecode_at_bcp(temp_reg, bc_reg, temp_reg, byte_no, 1);
192 __ movw(bc_reg, bc);
193 __ cbzw(temp_reg, L_patch_done); // don't patch
194 }
195 break;
196 default:
197 assert(byte_no == -1, "sanity");
198 // the pair bytecodes have already done the load.
199 if (load_bc_into_bc_reg) {
200 __ movw(bc_reg, bc);
201 }
202 }
203
204 if (JvmtiExport::can_post_breakpoint()) {
205 Label L_fast_patch;
206 // if a breakpoint is present we can't rewrite the stream directly
207 __ load_unsigned_byte(temp_reg, at_bcp(0));
208 __ cmpw(temp_reg, Bytecodes::_breakpoint);
209 __ br(Assembler::NE, L_fast_patch);
210 // Let breakpoint table handling rewrite to quicker bytecode
211 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::set_original_bytecode_at), rmethod, rbcp, bc_reg);
212 __ b(L_patch_done);
213 __ bind(L_fast_patch);
214 }
215
216 #ifdef ASSERT
217 Label L_okay;
218 __ load_unsigned_byte(temp_reg, at_bcp(0));
219 __ cmpw(temp_reg, (int) Bytecodes::java_code(bc));
220 __ br(Assembler::EQ, L_okay);
221 __ cmpw(temp_reg, bc_reg);
222 __ br(Assembler::EQ, L_okay);
223 __ stop("patching the wrong bytecode");
224 __ bind(L_okay);
225 #endif
226
227 // patch bytecode
228 __ strb(bc_reg, at_bcp(0));
229 __ bind(L_patch_done);
230 }
231
232
233 // Individual instructions
234
235 void TemplateTable::nop() {
236 transition(vtos, vtos);
237 // nothing to do
238 }
239
240 void TemplateTable::shouldnotreachhere() {
241 transition(vtos, vtos);
242 __ stop("shouldnotreachhere bytecode");
243 }
244
245 void TemplateTable::aconst_null()
246 {
247 transition(vtos, atos);
248 __ mov(r0, 0);
249 }
250
251 void TemplateTable::iconst(int value)
252 {
253 transition(vtos, itos);
254 __ mov(r0, value);
255 }
256
257 void TemplateTable::lconst(int value)
258 {
259 __ mov(r0, value);
260 }
261
262 void TemplateTable::fconst(int value)
263 {
264 transition(vtos, ftos);
265 switch (value) {
266 case 0:
267 __ fmovs(v0, zr);
268 break;
269 case 1:
270 __ fmovs(v0, 1.0);
271 break;
272 case 2:
273 __ fmovs(v0, 2.0);
274 break;
275 default:
276 ShouldNotReachHere();
277 break;
278 }
279 }
280
281 void TemplateTable::dconst(int value)
282 {
283 transition(vtos, dtos);
284 switch (value) {
285 case 0:
286 __ fmovd(v0, zr);
287 break;
288 case 1:
289 __ fmovd(v0, 1.0);
290 break;
291 case 2:
292 __ fmovd(v0, 2.0);
293 break;
294 default:
295 ShouldNotReachHere();
296 break;
297 }
298 }
299
300 void TemplateTable::bipush()
301 {
302 transition(vtos, itos);
303 __ load_signed_byte32(r0, at_bcp(1));
304 }
305
306 void TemplateTable::sipush()
307 {
308 transition(vtos, itos);
309 __ load_unsigned_short(r0, at_bcp(1));
310 __ revw(r0, r0);
311 __ asrw(r0, r0, 16);
312 }
313
314 void TemplateTable::ldc(bool wide)
315 {
316 transition(vtos, vtos);
317 Label call_ldc, notFloat, notClass, notInt, Done;
318
319 if (wide) {
320 __ get_unsigned_2_byte_index_at_bcp(r1, 1);
321 } else {
322 __ load_unsigned_byte(r1, at_bcp(1));
323 }
324 __ get_cpool_and_tags(r2, r0);
325
326 const int base_offset = ConstantPool::header_size() * wordSize;
327 const int tags_offset = Array<u1>::base_offset_in_bytes();
328
329 // get type
330 __ add(r3, r1, tags_offset);
331 __ lea(r3, Address(r0, r3));
332 __ ldarb(r3, r3);
333
334 // unresolved class - get the resolved class
335 __ cmp(r3, (u1)JVM_CONSTANT_UnresolvedClass);
336 __ br(Assembler::EQ, call_ldc);
337
338 // unresolved class in error state - call into runtime to throw the error
339 // from the first resolution attempt
340 __ cmp(r3, (u1)JVM_CONSTANT_UnresolvedClassInError);
341 __ br(Assembler::EQ, call_ldc);
342
343 // resolved class - need to call vm to get java mirror of the class
344 __ cmp(r3, (u1)JVM_CONSTANT_Class);
345 __ br(Assembler::NE, notClass);
346
347 __ bind(call_ldc);
348 __ mov(c_rarg1, wide);
349 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::ldc), c_rarg1);
350 __ push_ptr(r0);
351 __ verify_oop(r0);
352 __ b(Done);
353
354 __ bind(notClass);
355 __ cmp(r3, (u1)JVM_CONSTANT_Float);
356 __ br(Assembler::NE, notFloat);
357 // ftos
358 __ adds(r1, r2, r1, Assembler::LSL, 3);
359 __ ldrs(v0, Address(r1, base_offset));
360 __ push_f();
361 __ b(Done);
362
363 __ bind(notFloat);
364
365 __ cmp(r3, (u1)JVM_CONSTANT_Integer);
366 __ br(Assembler::NE, notInt);
367
368 // itos
369 __ adds(r1, r2, r1, Assembler::LSL, 3);
370 __ ldrw(r0, Address(r1, base_offset));
371 __ push_i(r0);
372 __ b(Done);
373
374 __ bind(notInt);
375 condy_helper(Done);
376
377 __ bind(Done);
378 }
379
380 // Fast path for caching oop constants.
381 void TemplateTable::fast_aldc(bool wide)
382 {
383 transition(vtos, atos);
384
385 Register result = r0;
386 Register tmp = r1;
387 Register rarg = r2;
388
389 int index_size = wide ? sizeof(u2) : sizeof(u1);
390
391 Label resolved;
392
393 // We are resolved if the resolved reference cache entry contains a
394 // non-null object (String, MethodType, etc.)
395 assert_different_registers(result, tmp);
396 __ get_cache_index_at_bcp(tmp, 1, index_size);
397 __ load_resolved_reference_at_index(result, tmp);
398 __ cbnz(result, resolved);
399
400 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc);
401
402 // first time invocation - must resolve first
403 __ mov(rarg, (int)bytecode());
404 __ call_VM(result, entry, rarg);
405
406 __ bind(resolved);
407
408 { // Check for the null sentinel.
409 // If we just called the VM, it already did the mapping for us,
410 // but it's harmless to retry.
411 Label notNull;
412
413 // Stash null_sentinel address to get its value later
414 __ movptr(rarg, (uintptr_t)Universe::the_null_sentinel_addr());
415 __ ldr(tmp, Address(rarg));
416 __ cmpoop(result, tmp);
417 __ br(Assembler::NE, notNull);
418 __ mov(result, 0); // NULL object reference
419 __ bind(notNull);
420 }
421
422 if (VerifyOops) {
423 // Safe to call with 0 result
424 __ verify_oop(result);
425 }
426 }
427
428 void TemplateTable::ldc2_w()
429 {
430 transition(vtos, vtos);
431 Label notDouble, notLong, Done;
432 __ get_unsigned_2_byte_index_at_bcp(r0, 1);
433
434 __ get_cpool_and_tags(r1, r2);
435 const int base_offset = ConstantPool::header_size() * wordSize;
436 const int tags_offset = Array<u1>::base_offset_in_bytes();
437
438 // get type
439 __ lea(r2, Address(r2, r0, Address::lsl(0)));
440 __ load_unsigned_byte(r2, Address(r2, tags_offset));
441 __ cmpw(r2, (int)JVM_CONSTANT_Double);
442 __ br(Assembler::NE, notDouble);
443
444 // dtos
445 __ lea (r2, Address(r1, r0, Address::lsl(3)));
446 __ ldrd(v0, Address(r2, base_offset));
447 __ push_d();
448 __ b(Done);
449
450 __ bind(notDouble);
451 __ cmpw(r2, (int)JVM_CONSTANT_Long);
452 __ br(Assembler::NE, notLong);
453
454 // ltos
455 __ lea(r0, Address(r1, r0, Address::lsl(3)));
456 __ ldr(r0, Address(r0, base_offset));
457 __ push_l();
458 __ b(Done);
459
460 __ bind(notLong);
461 condy_helper(Done);
462
463 __ bind(Done);
464 }
465
466 void TemplateTable::condy_helper(Label& Done)
467 {
468 Register obj = r0;
469 Register rarg = r1;
470 Register flags = r2;
471 Register off = r3;
472
473 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc);
474
475 __ mov(rarg, (int) bytecode());
476 __ call_VM(obj, entry, rarg);
477
478 __ get_vm_result_2(flags, rthread);
479
480 // VMr = obj = base address to find primitive value to push
481 // VMr2 = flags = (tos, off) using format of CPCE::_flags
482 __ mov(off, flags);
483 __ andw(off, off, ConstantPoolCacheEntry::field_index_mask);
484
485 const Address field(obj, off);
486
487 // What sort of thing are we loading?
488 // x86 uses a shift and mask or wings it with a shift plus assert
489 // the mask is not needed. aarch64 just uses bitfield extract
490 __ ubfxw(flags, flags, ConstantPoolCacheEntry::tos_state_shift,
491 ConstantPoolCacheEntry::tos_state_bits);
492
493 switch (bytecode()) {
494 case Bytecodes::_ldc:
495 case Bytecodes::_ldc_w:
496 {
497 // tos in (itos, ftos, stos, btos, ctos, ztos)
498 Label notInt, notFloat, notShort, notByte, notChar, notBool;
499 __ cmpw(flags, itos);
500 __ br(Assembler::NE, notInt);
501 // itos
502 __ ldrw(r0, field);
503 __ push(itos);
504 __ b(Done);
505
506 __ bind(notInt);
507 __ cmpw(flags, ftos);
508 __ br(Assembler::NE, notFloat);
509 // ftos
510 __ load_float(field);
511 __ push(ftos);
512 __ b(Done);
513
514 __ bind(notFloat);
515 __ cmpw(flags, stos);
516 __ br(Assembler::NE, notShort);
517 // stos
518 __ load_signed_short(r0, field);
519 __ push(stos);
520 __ b(Done);
521
522 __ bind(notShort);
523 __ cmpw(flags, btos);
524 __ br(Assembler::NE, notByte);
525 // btos
526 __ load_signed_byte(r0, field);
527 __ push(btos);
528 __ b(Done);
529
530 __ bind(notByte);
531 __ cmpw(flags, ctos);
532 __ br(Assembler::NE, notChar);
533 // ctos
534 __ load_unsigned_short(r0, field);
535 __ push(ctos);
536 __ b(Done);
537
538 __ bind(notChar);
539 __ cmpw(flags, ztos);
540 __ br(Assembler::NE, notBool);
541 // ztos
542 __ load_signed_byte(r0, field);
543 __ push(ztos);
544 __ b(Done);
545
546 __ bind(notBool);
547 break;
548 }
549
550 case Bytecodes::_ldc2_w:
551 {
552 Label notLong, notDouble;
553 __ cmpw(flags, ltos);
554 __ br(Assembler::NE, notLong);
555 // ltos
556 __ ldr(r0, field);
557 __ push(ltos);
558 __ b(Done);
559
560 __ bind(notLong);
561 __ cmpw(flags, dtos);
562 __ br(Assembler::NE, notDouble);
563 // dtos
564 __ load_double(field);
565 __ push(dtos);
566 __ b(Done);
567
568 __ bind(notDouble);
569 break;
570 }
571
572 default:
573 ShouldNotReachHere();
574 }
575
576 __ stop("bad ldc/condy");
577 }
578
579 void TemplateTable::locals_index(Register reg, int offset)
580 {
581 __ ldrb(reg, at_bcp(offset));
582 __ neg(reg, reg);
583 }
584
585 void TemplateTable::iload() {
586 iload_internal();
587 }
588
589 void TemplateTable::nofast_iload() {
590 iload_internal(may_not_rewrite);
591 }
592
593 void TemplateTable::iload_internal(RewriteControl rc) {
594 transition(vtos, itos);
595 if (RewriteFrequentPairs && rc == may_rewrite) {
596 Label rewrite, done;
597 Register bc = r4;
598
599 // get next bytecode
600 __ load_unsigned_byte(r1, at_bcp(Bytecodes::length_for(Bytecodes::_iload)));
601
602 // if _iload, wait to rewrite to iload2. We only want to rewrite the
603 // last two iloads in a pair. Comparing against fast_iload means that
604 // the next bytecode is neither an iload or a caload, and therefore
605 // an iload pair.
606 __ cmpw(r1, Bytecodes::_iload);
607 __ br(Assembler::EQ, done);
608
609 // if _fast_iload rewrite to _fast_iload2
610 __ cmpw(r1, Bytecodes::_fast_iload);
611 __ movw(bc, Bytecodes::_fast_iload2);
612 __ br(Assembler::EQ, rewrite);
613
614 // if _caload rewrite to _fast_icaload
615 __ cmpw(r1, Bytecodes::_caload);
616 __ movw(bc, Bytecodes::_fast_icaload);
617 __ br(Assembler::EQ, rewrite);
618
619 // else rewrite to _fast_iload
620 __ movw(bc, Bytecodes::_fast_iload);
621
622 // rewrite
623 // bc: new bytecode
624 __ bind(rewrite);
625 patch_bytecode(Bytecodes::_iload, bc, r1, false);
626 __ bind(done);
627
628 }
629
630 // do iload, get the local value into tos
631 locals_index(r1);
632 __ ldr(r0, iaddress(r1));
633
634 }
635
636 void TemplateTable::fast_iload2()
637 {
638 transition(vtos, itos);
639 locals_index(r1);
640 __ ldr(r0, iaddress(r1));
641 __ push(itos);
642 locals_index(r1, 3);
643 __ ldr(r0, iaddress(r1));
644 }
645
646 void TemplateTable::fast_iload()
647 {
648 transition(vtos, itos);
649 locals_index(r1);
650 __ ldr(r0, iaddress(r1));
651 }
652
653 void TemplateTable::lload()
654 {
655 transition(vtos, ltos);
656 __ ldrb(r1, at_bcp(1));
657 __ sub(r1, rlocals, r1, ext::uxtw, LogBytesPerWord);
658 __ ldr(r0, Address(r1, Interpreter::local_offset_in_bytes(1)));
659 }
660
661 void TemplateTable::fload()
662 {
663 transition(vtos, ftos);
664 locals_index(r1);
665 // n.b. we use ldrd here because this is a 64 bit slot
666 // this is comparable to the iload case
667 __ ldrd(v0, faddress(r1));
668 }
669
670 void TemplateTable::dload()
671 {
672 transition(vtos, dtos);
673 __ ldrb(r1, at_bcp(1));
674 __ sub(r1, rlocals, r1, ext::uxtw, LogBytesPerWord);
675 __ ldrd(v0, Address(r1, Interpreter::local_offset_in_bytes(1)));
676 }
677
678 void TemplateTable::aload()
679 {
680 transition(vtos, atos);
681 locals_index(r1);
682 __ ldr(r0, iaddress(r1));
683 }
684
685 void TemplateTable::locals_index_wide(Register reg) {
686 __ ldrh(reg, at_bcp(2));
687 __ rev16w(reg, reg);
688 __ neg(reg, reg);
689 }
690
691 void TemplateTable::wide_iload() {
692 transition(vtos, itos);
693 locals_index_wide(r1);
694 __ ldr(r0, iaddress(r1));
695 }
696
697 void TemplateTable::wide_lload()
698 {
699 transition(vtos, ltos);
700 __ ldrh(r1, at_bcp(2));
701 __ rev16w(r1, r1);
702 __ sub(r1, rlocals, r1, ext::uxtw, LogBytesPerWord);
703 __ ldr(r0, Address(r1, Interpreter::local_offset_in_bytes(1)));
704 }
705
706 void TemplateTable::wide_fload()
707 {
708 transition(vtos, ftos);
709 locals_index_wide(r1);
710 // n.b. we use ldrd here because this is a 64 bit slot
711 // this is comparable to the iload case
712 __ ldrd(v0, faddress(r1));
713 }
714
715 void TemplateTable::wide_dload()
716 {
717 transition(vtos, dtos);
718 __ ldrh(r1, at_bcp(2));
719 __ rev16w(r1, r1);
720 __ sub(r1, rlocals, r1, ext::uxtw, LogBytesPerWord);
721 __ ldrd(v0, Address(r1, Interpreter::local_offset_in_bytes(1)));
722 }
723
724 void TemplateTable::wide_aload()
725 {
726 transition(vtos, atos);
727 locals_index_wide(r1);
728 __ ldr(r0, aaddress(r1));
729 }
730
731 void TemplateTable::index_check(Register array, Register index)
732 {
733 // destroys r1, rscratch1
734 // check array
735 __ null_check(array, arrayOopDesc::length_offset_in_bytes());
736 // sign extend index for use by indexed load
737 // __ movl2ptr(index, index);
738 // check index
739 Register length = rscratch1;
740 __ ldrw(length, Address(array, arrayOopDesc::length_offset_in_bytes()));
741 __ cmpw(index, length);
742 if (index != r1) {
743 // ??? convention: move aberrant index into r1 for exception message
744 assert(r1 != array, "different registers");
745 __ mov(r1, index);
746 }
747 Label ok;
748 __ br(Assembler::LO, ok);
749 // ??? convention: move array into r3 for exception message
750 __ mov(r3, array);
751 __ mov(rscratch1, Interpreter::_throw_ArrayIndexOutOfBoundsException_entry);
752 __ br(rscratch1);
753 __ bind(ok);
754 }
755
756 void TemplateTable::iaload()
757 {
758 transition(itos, itos);
759 __ mov(r1, r0);
760 __ pop_ptr(r0);
761 // r0: array
762 // r1: index
763 index_check(r0, r1); // leaves index in r1, kills rscratch1
764 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_INT) >> 2);
765 __ access_load_at(T_INT, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(2)), noreg, noreg);
766 }
767
768 void TemplateTable::laload()
769 {
770 transition(itos, ltos);
771 __ mov(r1, r0);
772 __ pop_ptr(r0);
773 // r0: array
774 // r1: index
775 index_check(r0, r1); // leaves index in r1, kills rscratch1
776 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_LONG) >> 3);
777 __ access_load_at(T_LONG, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(3)), noreg, noreg);
778 }
779
780 void TemplateTable::faload()
781 {
782 transition(itos, ftos);
783 __ mov(r1, r0);
784 __ pop_ptr(r0);
785 // r0: array
786 // r1: index
787 index_check(r0, r1); // leaves index in r1, kills rscratch1
788 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_FLOAT) >> 2);
789 __ access_load_at(T_FLOAT, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(2)), noreg, noreg);
790 }
791
792 void TemplateTable::daload()
793 {
794 transition(itos, dtos);
795 __ mov(r1, r0);
796 __ pop_ptr(r0);
797 // r0: array
798 // r1: index
799 index_check(r0, r1); // leaves index in r1, kills rscratch1
800 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_DOUBLE) >> 3);
801 __ access_load_at(T_DOUBLE, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(3)), noreg, noreg);
802 }
803
804 void TemplateTable::aaload()
805 {
806 transition(itos, atos);
807 __ mov(r1, r0);
808 __ pop_ptr(r0);
809 // r0: array
810 // r1: index
811 index_check(r0, r1); // leaves index in r1, kills rscratch1
812 if (EnableValhalla && ValueArrayFlatten) {
813 Label is_flat_array, done;
814
815 __ test_flat_array_oop(r0, r10 /*temp*/, is_flat_array);
816 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_OBJECT) >> LogBytesPerHeapOop);
817 do_oop_load(_masm, Address(r0, r1, Address::uxtw(LogBytesPerHeapOop)), r0, IS_ARRAY);
818
819 __ b(done);
820 __ bind(is_flat_array);
821 __ call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::value_array_load), r0, r1);
822 __ bind(done);
823 } else {
824 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_OBJECT) >> LogBytesPerHeapOop);
825 do_oop_load(_masm, Address(r0, r1, Address::uxtw(LogBytesPerHeapOop)), r0, IS_ARRAY);
826 }
827 }
828
829 void TemplateTable::baload()
830 {
831 transition(itos, itos);
832 __ mov(r1, r0);
833 __ pop_ptr(r0);
834 // r0: array
835 // r1: index
836 index_check(r0, r1); // leaves index in r1, kills rscratch1
837 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_BYTE) >> 0);
838 __ access_load_at(T_BYTE, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(0)), noreg, noreg);
839 }
840
841 void TemplateTable::caload()
842 {
843 transition(itos, itos);
844 __ mov(r1, r0);
845 __ pop_ptr(r0);
846 // r0: array
847 // r1: index
848 index_check(r0, r1); // leaves index in r1, kills rscratch1
849 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_CHAR) >> 1);
850 __ access_load_at(T_CHAR, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(1)), noreg, noreg);
851 }
852
853 // iload followed by caload frequent pair
854 void TemplateTable::fast_icaload()
855 {
856 transition(vtos, itos);
857 // load index out of locals
858 locals_index(r2);
859 __ ldr(r1, iaddress(r2));
860
861 __ pop_ptr(r0);
862
863 // r0: array
864 // r1: index
865 index_check(r0, r1); // leaves index in r1, kills rscratch1
866 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_CHAR) >> 1);
867 __ access_load_at(T_CHAR, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(1)), noreg, noreg);
868 }
869
870 void TemplateTable::saload()
871 {
872 transition(itos, itos);
873 __ mov(r1, r0);
874 __ pop_ptr(r0);
875 // r0: array
876 // r1: index
877 index_check(r0, r1); // leaves index in r1, kills rscratch1
878 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_SHORT) >> 1);
879 __ access_load_at(T_SHORT, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(1)), noreg, noreg);
880 }
881
882 void TemplateTable::iload(int n)
883 {
884 transition(vtos, itos);
885 __ ldr(r0, iaddress(n));
886 }
887
888 void TemplateTable::lload(int n)
889 {
890 transition(vtos, ltos);
891 __ ldr(r0, laddress(n));
892 }
893
894 void TemplateTable::fload(int n)
895 {
896 transition(vtos, ftos);
897 __ ldrs(v0, faddress(n));
898 }
899
900 void TemplateTable::dload(int n)
901 {
902 transition(vtos, dtos);
903 __ ldrd(v0, daddress(n));
904 }
905
906 void TemplateTable::aload(int n)
907 {
908 transition(vtos, atos);
909 __ ldr(r0, iaddress(n));
910 }
911
912 void TemplateTable::aload_0() {
913 aload_0_internal();
914 }
915
916 void TemplateTable::nofast_aload_0() {
917 aload_0_internal(may_not_rewrite);
918 }
919
920 void TemplateTable::aload_0_internal(RewriteControl rc) {
921 // According to bytecode histograms, the pairs:
922 //
923 // _aload_0, _fast_igetfield
924 // _aload_0, _fast_agetfield
925 // _aload_0, _fast_fgetfield
926 //
927 // occur frequently. If RewriteFrequentPairs is set, the (slow)
928 // _aload_0 bytecode checks if the next bytecode is either
929 // _fast_igetfield, _fast_agetfield or _fast_fgetfield and then
930 // rewrites the current bytecode into a pair bytecode; otherwise it
931 // rewrites the current bytecode into _fast_aload_0 that doesn't do
932 // the pair check anymore.
933 //
934 // Note: If the next bytecode is _getfield, the rewrite must be
935 // delayed, otherwise we may miss an opportunity for a pair.
936 //
937 // Also rewrite frequent pairs
938 // aload_0, aload_1
939 // aload_0, iload_1
940 // These bytecodes with a small amount of code are most profitable
941 // to rewrite
942 if (RewriteFrequentPairs && rc == may_rewrite) {
943 Label rewrite, done;
944 const Register bc = r4;
945
946 // get next bytecode
947 __ load_unsigned_byte(r1, at_bcp(Bytecodes::length_for(Bytecodes::_aload_0)));
948
949 // if _getfield then wait with rewrite
950 __ cmpw(r1, Bytecodes::Bytecodes::_getfield);
951 __ br(Assembler::EQ, done);
952
953 // if _igetfield then rewrite to _fast_iaccess_0
954 assert(Bytecodes::java_code(Bytecodes::_fast_iaccess_0) == Bytecodes::_aload_0, "fix bytecode definition");
955 __ cmpw(r1, Bytecodes::_fast_igetfield);
956 __ movw(bc, Bytecodes::_fast_iaccess_0);
957 __ br(Assembler::EQ, rewrite);
958
959 // if _agetfield then rewrite to _fast_aaccess_0
960 assert(Bytecodes::java_code(Bytecodes::_fast_aaccess_0) == Bytecodes::_aload_0, "fix bytecode definition");
961 __ cmpw(r1, Bytecodes::_fast_agetfield);
962 __ movw(bc, Bytecodes::_fast_aaccess_0);
963 __ br(Assembler::EQ, rewrite);
964
965 // if _fgetfield then rewrite to _fast_faccess_0
966 assert(Bytecodes::java_code(Bytecodes::_fast_faccess_0) == Bytecodes::_aload_0, "fix bytecode definition");
967 __ cmpw(r1, Bytecodes::_fast_fgetfield);
968 __ movw(bc, Bytecodes::_fast_faccess_0);
969 __ br(Assembler::EQ, rewrite);
970
971 // else rewrite to _fast_aload0
972 assert(Bytecodes::java_code(Bytecodes::_fast_aload_0) == Bytecodes::_aload_0, "fix bytecode definition");
973 __ movw(bc, Bytecodes::Bytecodes::_fast_aload_0);
974
975 // rewrite
976 // bc: new bytecode
977 __ bind(rewrite);
978 patch_bytecode(Bytecodes::_aload_0, bc, r1, false);
979
980 __ bind(done);
981 }
982
983 // Do actual aload_0 (must do this after patch_bytecode which might call VM and GC might change oop).
984 aload(0);
985 }
986
987 void TemplateTable::istore()
988 {
989 transition(itos, vtos);
990 locals_index(r1);
991 // FIXME: We're being very pernickerty here storing a jint in a
992 // local with strw, which costs an extra instruction over what we'd
993 // be able to do with a simple str. We should just store the whole
994 // word.
995 __ lea(rscratch1, iaddress(r1));
996 __ strw(r0, Address(rscratch1));
997 }
998
999 void TemplateTable::lstore()
1000 {
1001 transition(ltos, vtos);
1002 locals_index(r1);
1003 __ str(r0, laddress(r1, rscratch1, _masm));
1004 }
1005
1006 void TemplateTable::fstore() {
1007 transition(ftos, vtos);
1008 locals_index(r1);
1009 __ lea(rscratch1, iaddress(r1));
1010 __ strs(v0, Address(rscratch1));
1011 }
1012
1013 void TemplateTable::dstore() {
1014 transition(dtos, vtos);
1015 locals_index(r1);
1016 __ strd(v0, daddress(r1, rscratch1, _masm));
1017 }
1018
1019 void TemplateTable::astore()
1020 {
1021 transition(vtos, vtos);
1022 __ pop_ptr(r0);
1023 locals_index(r1);
1024 __ str(r0, aaddress(r1));
1025 }
1026
1027 void TemplateTable::wide_istore() {
1028 transition(vtos, vtos);
1029 __ pop_i();
1030 locals_index_wide(r1);
1031 __ lea(rscratch1, iaddress(r1));
1032 __ strw(r0, Address(rscratch1));
1033 }
1034
1035 void TemplateTable::wide_lstore() {
1036 transition(vtos, vtos);
1037 __ pop_l();
1038 locals_index_wide(r1);
1039 __ str(r0, laddress(r1, rscratch1, _masm));
1040 }
1041
1042 void TemplateTable::wide_fstore() {
1043 transition(vtos, vtos);
1044 __ pop_f();
1045 locals_index_wide(r1);
1046 __ lea(rscratch1, faddress(r1));
1047 __ strs(v0, rscratch1);
1048 }
1049
1050 void TemplateTable::wide_dstore() {
1051 transition(vtos, vtos);
1052 __ pop_d();
1053 locals_index_wide(r1);
1054 __ strd(v0, daddress(r1, rscratch1, _masm));
1055 }
1056
1057 void TemplateTable::wide_astore() {
1058 transition(vtos, vtos);
1059 __ pop_ptr(r0);
1060 locals_index_wide(r1);
1061 __ str(r0, aaddress(r1));
1062 }
1063
1064 void TemplateTable::iastore() {
1065 transition(itos, vtos);
1066 __ pop_i(r1);
1067 __ pop_ptr(r3);
1068 // r0: value
1069 // r1: index
1070 // r3: array
1071 index_check(r3, r1); // prefer index in r1
1072 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_INT) >> 2);
1073 __ access_store_at(T_INT, IN_HEAP | IS_ARRAY, Address(r3, r1, Address::uxtw(2)), r0, noreg, noreg);
1074 }
1075
1076 void TemplateTable::lastore() {
1077 transition(ltos, vtos);
1078 __ pop_i(r1);
1079 __ pop_ptr(r3);
1080 // r0: value
1081 // r1: index
1082 // r3: array
1083 index_check(r3, r1); // prefer index in r1
1084 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_LONG) >> 3);
1085 __ access_store_at(T_LONG, IN_HEAP | IS_ARRAY, Address(r3, r1, Address::uxtw(3)), r0, noreg, noreg);
1086 }
1087
1088 void TemplateTable::fastore() {
1089 transition(ftos, vtos);
1090 __ pop_i(r1);
1091 __ pop_ptr(r3);
1092 // v0: value
1093 // r1: index
1094 // r3: array
1095 index_check(r3, r1); // prefer index in r1
1096 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_FLOAT) >> 2);
1097 __ access_store_at(T_FLOAT, IN_HEAP | IS_ARRAY, Address(r3, r1, Address::uxtw(2)), noreg /* ftos */, noreg, noreg);
1098 }
1099
1100 void TemplateTable::dastore() {
1101 transition(dtos, vtos);
1102 __ pop_i(r1);
1103 __ pop_ptr(r3);
1104 // v0: value
1105 // r1: index
1106 // r3: array
1107 index_check(r3, r1); // prefer index in r1
1108 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_DOUBLE) >> 3);
1109 __ access_store_at(T_DOUBLE, IN_HEAP | IS_ARRAY, Address(r3, r1, Address::uxtw(3)), noreg /* dtos */, noreg, noreg);
1110 }
1111
1112 void TemplateTable::aastore() {
1113 Label is_null, ok_is_subtype, done;
1114 transition(vtos, vtos);
1115 // stack: ..., array, index, value
1116 __ ldr(r0, at_tos()); // value
1117 __ ldr(r2, at_tos_p1()); // index
1118 __ ldr(r3, at_tos_p2()); // array
1119
1120 Address element_address(r3, r4, Address::uxtw(LogBytesPerHeapOop));
1121
1122 index_check(r3, r2); // kills r1
1123
1124 // DMS CHECK: what does line below do?
1125 __ add(r4, r2, arrayOopDesc::base_offset_in_bytes(T_OBJECT) >> LogBytesPerHeapOop);
1126
1127 // do array store check - check for NULL value first
1128 __ cbz(r0, is_null);
1129
1130 // Load array klass to r1, check if it is flat and bail out to ususal way
1131 Label is_flat_array;
1132 if (ValueArrayFlatten) {
1133 __ load_klass(r1, r3);
1134 __ test_flat_array_klass(r1, r10 /*temp*/, is_flat_array);
1135 }
1136
1137 // Move subklass into r1
1138 __ load_klass(r1, r0);
1139 // Move superklass into r0
1140 __ load_klass(r0, r3);
1141 __ ldr(r0, Address(r0,
1142 ObjArrayKlass::element_klass_offset()));
1143 // Compress array + index*oopSize + 12 into a single register. Frees r2.
1144
1145 // Generate subtype check. Blows r2, r5
1146 // Superklass in r0. Subklass in r1.
1147 __ gen_subtype_check(r1, ok_is_subtype);
1148
1149 // Come here on failure
1150 // object is at TOS
1151 __ b(Interpreter::_throw_ArrayStoreException_entry);
1152
1153 // Come here on success
1154 __ bind(ok_is_subtype);
1155
1156 // Get the value we will store
1157 __ ldr(r0, at_tos());
1158 // Now store using the appropriate barrier
1159 do_oop_store(_masm, element_address, r0, IS_ARRAY);
1160 __ b(done);
1161
1162 // Have a NULL in r0, r3=array, r2=index. Store NULL at ary[idx]
1163 __ bind(is_null);
1164 __ profile_null_seen(r2);
1165
1166 if (EnableValhalla) {
1167 Label is_null_into_value_array_npe, store_null;
1168
1169 __ load_klass(r0, r3);
1170 // No way to store null in flat array
1171 __ test_flat_array_klass(r0, r1, is_null_into_value_array_npe);
1172
1173 // Use case for storing values in objArray where element_klass is specifically
1174 // a value type because they could not be flattened "for reasons",
1175 // these need to have the same semantics as flat arrays, i.e. NPE
1176 __ ldr(r0, Address(r0, ObjArrayKlass::element_klass_offset()));
1177 __ test_klass_is_value(r0, r1, is_null_into_value_array_npe);
1178 __ b(store_null);
1179
1180 __ bind(is_null_into_value_array_npe);
1181 __ b(ExternalAddress(Interpreter::_throw_NullPointerException_entry));
1182
1183 __ bind(store_null);
1184 }
1185
1186 // Store a NULL
1187 do_oop_store(_masm, element_address, noreg, IS_ARRAY);
1188 __ b(done);
1189
1190
1191 if (EnableValhalla) {
1192 // r0 - value, r2 - index, r3 - array. r1 - loaded array klass
1193 // store non-null value
1194 __ bind(is_flat_array);
1195
1196 // Simplistic type check...
1197 Label is_type_ok;
1198
1199 // Profile the not-null value's klass.
1200 // Load value class
1201 __ load_klass(r10, r0);
1202 __ profile_typecheck(r2, r1, r0); // blows r2, and r0
1203
1204 // flat value array needs exact type match
1205 // is "r10 == r0" (value subclass == array element superclass)
1206
1207 // Move element klass into r0
1208 __ ldr(r0, Address(r1, ArrayKlass::element_klass_offset()));
1209 __ cmp(r0, r10);
1210 __ br(Assembler::EQ, is_type_ok);
1211
1212 __ profile_typecheck_failed(r2);
1213 __ b(ExternalAddress(Interpreter::_throw_ArrayStoreException_entry));
1214 __ bind(is_type_ok);
1215
1216 // DMS CHECK: Reload from TOS to be safe,
1217 // DMS CHECK: Because of profile_typecheck that blows r2 and r0. Should we really do it?
1218 __ ldr(r1, at_tos()); // value
1219 __ mov(r2, r3); // array
1220 __ ldr(r3, at_tos_p1()); // index
1221 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::value_array_store), r1, r2, r3);
1222 }
1223
1224
1225 // Pop stack arguments
1226 __ bind(done);
1227 __ add(esp, esp, 3 * Interpreter::stackElementSize);
1228 }
1229
1230 void TemplateTable::bastore()
1231 {
1232 transition(itos, vtos);
1233 __ pop_i(r1);
1234 __ pop_ptr(r3);
1235 // r0: value
1236 // r1: index
1237 // r3: array
1238 index_check(r3, r1); // prefer index in r1
1239
1240 // Need to check whether array is boolean or byte
1241 // since both types share the bastore bytecode.
1242 __ load_klass(r2, r3);
1243 __ ldrw(r2, Address(r2, Klass::layout_helper_offset()));
1244 int diffbit_index = exact_log2(Klass::layout_helper_boolean_diffbit());
1245 Label L_skip;
1246 __ tbz(r2, diffbit_index, L_skip);
1247 __ andw(r0, r0, 1); // if it is a T_BOOLEAN array, mask the stored value to 0/1
1248 __ bind(L_skip);
1249
1250 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_BYTE) >> 0);
1251 __ access_store_at(T_BYTE, IN_HEAP | IS_ARRAY, Address(r3, r1, Address::uxtw(0)), r0, noreg, noreg);
1252 }
1253
1254 void TemplateTable::castore()
1255 {
1256 transition(itos, vtos);
1257 __ pop_i(r1);
1258 __ pop_ptr(r3);
1259 // r0: value
1260 // r1: index
1261 // r3: array
1262 index_check(r3, r1); // prefer index in r1
1263 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_CHAR) >> 1);
1264 __ access_store_at(T_CHAR, IN_HEAP | IS_ARRAY, Address(r3, r1, Address::uxtw(1)), r0, noreg, noreg);
1265 }
1266
1267 void TemplateTable::sastore()
1268 {
1269 castore();
1270 }
1271
1272 void TemplateTable::istore(int n)
1273 {
1274 transition(itos, vtos);
1275 __ str(r0, iaddress(n));
1276 }
1277
1278 void TemplateTable::lstore(int n)
1279 {
1280 transition(ltos, vtos);
1281 __ str(r0, laddress(n));
1282 }
1283
1284 void TemplateTable::fstore(int n)
1285 {
1286 transition(ftos, vtos);
1287 __ strs(v0, faddress(n));
1288 }
1289
1290 void TemplateTable::dstore(int n)
1291 {
1292 transition(dtos, vtos);
1293 __ strd(v0, daddress(n));
1294 }
1295
1296 void TemplateTable::astore(int n)
1297 {
1298 transition(vtos, vtos);
1299 __ pop_ptr(r0);
1300 __ str(r0, iaddress(n));
1301 }
1302
1303 void TemplateTable::pop()
1304 {
1305 transition(vtos, vtos);
1306 __ add(esp, esp, Interpreter::stackElementSize);
1307 }
1308
1309 void TemplateTable::pop2()
1310 {
1311 transition(vtos, vtos);
1312 __ add(esp, esp, 2 * Interpreter::stackElementSize);
1313 }
1314
1315 void TemplateTable::dup()
1316 {
1317 transition(vtos, vtos);
1318 __ ldr(r0, Address(esp, 0));
1319 __ push(r0);
1320 // stack: ..., a, a
1321 }
1322
1323 void TemplateTable::dup_x1()
1324 {
1325 transition(vtos, vtos);
1326 // stack: ..., a, b
1327 __ ldr(r0, at_tos()); // load b
1328 __ ldr(r2, at_tos_p1()); // load a
1329 __ str(r0, at_tos_p1()); // store b
1330 __ str(r2, at_tos()); // store a
1331 __ push(r0); // push b
1332 // stack: ..., b, a, b
1333 }
1334
1335 void TemplateTable::dup_x2()
1336 {
1337 transition(vtos, vtos);
1338 // stack: ..., a, b, c
1339 __ ldr(r0, at_tos()); // load c
1340 __ ldr(r2, at_tos_p2()); // load a
1341 __ str(r0, at_tos_p2()); // store c in a
1342 __ push(r0); // push c
1343 // stack: ..., c, b, c, c
1344 __ ldr(r0, at_tos_p2()); // load b
1345 __ str(r2, at_tos_p2()); // store a in b
1346 // stack: ..., c, a, c, c
1347 __ str(r0, at_tos_p1()); // store b in c
1348 // stack: ..., c, a, b, c
1349 }
1350
1351 void TemplateTable::dup2()
1352 {
1353 transition(vtos, vtos);
1354 // stack: ..., a, b
1355 __ ldr(r0, at_tos_p1()); // load a
1356 __ push(r0); // push a
1357 __ ldr(r0, at_tos_p1()); // load b
1358 __ push(r0); // push b
1359 // stack: ..., a, b, a, b
1360 }
1361
1362 void TemplateTable::dup2_x1()
1363 {
1364 transition(vtos, vtos);
1365 // stack: ..., a, b, c
1366 __ ldr(r2, at_tos()); // load c
1367 __ ldr(r0, at_tos_p1()); // load b
1368 __ push(r0); // push b
1369 __ push(r2); // push c
1370 // stack: ..., a, b, c, b, c
1371 __ str(r2, at_tos_p3()); // store c in b
1372 // stack: ..., a, c, c, b, c
1373 __ ldr(r2, at_tos_p4()); // load a
1374 __ str(r2, at_tos_p2()); // store a in 2nd c
1375 // stack: ..., a, c, a, b, c
1376 __ str(r0, at_tos_p4()); // store b in a
1377 // stack: ..., b, c, a, b, c
1378 }
1379
1380 void TemplateTable::dup2_x2()
1381 {
1382 transition(vtos, vtos);
1383 // stack: ..., a, b, c, d
1384 __ ldr(r2, at_tos()); // load d
1385 __ ldr(r0, at_tos_p1()); // load c
1386 __ push(r0) ; // push c
1387 __ push(r2); // push d
1388 // stack: ..., a, b, c, d, c, d
1389 __ ldr(r0, at_tos_p4()); // load b
1390 __ str(r0, at_tos_p2()); // store b in d
1391 __ str(r2, at_tos_p4()); // store d in b
1392 // stack: ..., a, d, c, b, c, d
1393 __ ldr(r2, at_tos_p5()); // load a
1394 __ ldr(r0, at_tos_p3()); // load c
1395 __ str(r2, at_tos_p3()); // store a in c
1396 __ str(r0, at_tos_p5()); // store c in a
1397 // stack: ..., c, d, a, b, c, d
1398 }
1399
1400 void TemplateTable::swap()
1401 {
1402 transition(vtos, vtos);
1403 // stack: ..., a, b
1404 __ ldr(r2, at_tos_p1()); // load a
1405 __ ldr(r0, at_tos()); // load b
1406 __ str(r2, at_tos()); // store a in b
1407 __ str(r0, at_tos_p1()); // store b in a
1408 // stack: ..., b, a
1409 }
1410
1411 void TemplateTable::iop2(Operation op)
1412 {
1413 transition(itos, itos);
1414 // r0 <== r1 op r0
1415 __ pop_i(r1);
1416 switch (op) {
1417 case add : __ addw(r0, r1, r0); break;
1418 case sub : __ subw(r0, r1, r0); break;
1419 case mul : __ mulw(r0, r1, r0); break;
1420 case _and : __ andw(r0, r1, r0); break;
1421 case _or : __ orrw(r0, r1, r0); break;
1422 case _xor : __ eorw(r0, r1, r0); break;
1423 case shl : __ lslvw(r0, r1, r0); break;
1424 case shr : __ asrvw(r0, r1, r0); break;
1425 case ushr : __ lsrvw(r0, r1, r0);break;
1426 default : ShouldNotReachHere();
1427 }
1428 }
1429
1430 void TemplateTable::lop2(Operation op)
1431 {
1432 transition(ltos, ltos);
1433 // r0 <== r1 op r0
1434 __ pop_l(r1);
1435 switch (op) {
1436 case add : __ add(r0, r1, r0); break;
1437 case sub : __ sub(r0, r1, r0); break;
1438 case mul : __ mul(r0, r1, r0); break;
1439 case _and : __ andr(r0, r1, r0); break;
1440 case _or : __ orr(r0, r1, r0); break;
1441 case _xor : __ eor(r0, r1, r0); break;
1442 default : ShouldNotReachHere();
1443 }
1444 }
1445
1446 void TemplateTable::idiv()
1447 {
1448 transition(itos, itos);
1449 // explicitly check for div0
1450 Label no_div0;
1451 __ cbnzw(r0, no_div0);
1452 __ mov(rscratch1, Interpreter::_throw_ArithmeticException_entry);
1453 __ br(rscratch1);
1454 __ bind(no_div0);
1455 __ pop_i(r1);
1456 // r0 <== r1 idiv r0
1457 __ corrected_idivl(r0, r1, r0, /* want_remainder */ false);
1458 }
1459
1460 void TemplateTable::irem()
1461 {
1462 transition(itos, itos);
1463 // explicitly check for div0
1464 Label no_div0;
1465 __ cbnzw(r0, no_div0);
1466 __ mov(rscratch1, Interpreter::_throw_ArithmeticException_entry);
1467 __ br(rscratch1);
1468 __ bind(no_div0);
1469 __ pop_i(r1);
1470 // r0 <== r1 irem r0
1471 __ corrected_idivl(r0, r1, r0, /* want_remainder */ true);
1472 }
1473
1474 void TemplateTable::lmul()
1475 {
1476 transition(ltos, ltos);
1477 __ pop_l(r1);
1478 __ mul(r0, r0, r1);
1479 }
1480
1481 void TemplateTable::ldiv()
1482 {
1483 transition(ltos, ltos);
1484 // explicitly check for div0
1485 Label no_div0;
1486 __ cbnz(r0, no_div0);
1487 __ mov(rscratch1, Interpreter::_throw_ArithmeticException_entry);
1488 __ br(rscratch1);
1489 __ bind(no_div0);
1490 __ pop_l(r1);
1491 // r0 <== r1 ldiv r0
1492 __ corrected_idivq(r0, r1, r0, /* want_remainder */ false);
1493 }
1494
1495 void TemplateTable::lrem()
1496 {
1497 transition(ltos, ltos);
1498 // explicitly check for div0
1499 Label no_div0;
1500 __ cbnz(r0, no_div0);
1501 __ mov(rscratch1, Interpreter::_throw_ArithmeticException_entry);
1502 __ br(rscratch1);
1503 __ bind(no_div0);
1504 __ pop_l(r1);
1505 // r0 <== r1 lrem r0
1506 __ corrected_idivq(r0, r1, r0, /* want_remainder */ true);
1507 }
1508
1509 void TemplateTable::lshl()
1510 {
1511 transition(itos, ltos);
1512 // shift count is in r0
1513 __ pop_l(r1);
1514 __ lslv(r0, r1, r0);
1515 }
1516
1517 void TemplateTable::lshr()
1518 {
1519 transition(itos, ltos);
1520 // shift count is in r0
1521 __ pop_l(r1);
1522 __ asrv(r0, r1, r0);
1523 }
1524
1525 void TemplateTable::lushr()
1526 {
1527 transition(itos, ltos);
1528 // shift count is in r0
1529 __ pop_l(r1);
1530 __ lsrv(r0, r1, r0);
1531 }
1532
1533 void TemplateTable::fop2(Operation op)
1534 {
1535 transition(ftos, ftos);
1536 switch (op) {
1537 case add:
1538 // n.b. use ldrd because this is a 64 bit slot
1539 __ pop_f(v1);
1540 __ fadds(v0, v1, v0);
1541 break;
1542 case sub:
1543 __ pop_f(v1);
1544 __ fsubs(v0, v1, v0);
1545 break;
1546 case mul:
1547 __ pop_f(v1);
1548 __ fmuls(v0, v1, v0);
1549 break;
1550 case div:
1551 __ pop_f(v1);
1552 __ fdivs(v0, v1, v0);
1553 break;
1554 case rem:
1555 __ fmovs(v1, v0);
1556 __ pop_f(v0);
1557 __ call_VM_leaf_base1(CAST_FROM_FN_PTR(address, SharedRuntime::frem),
1558 0, 2, MacroAssembler::ret_type_float);
1559 break;
1560 default:
1561 ShouldNotReachHere();
1562 break;
1563 }
1564 }
1565
1566 void TemplateTable::dop2(Operation op)
1567 {
1568 transition(dtos, dtos);
1569 switch (op) {
1570 case add:
1571 // n.b. use ldrd because this is a 64 bit slot
1572 __ pop_d(v1);
1573 __ faddd(v0, v1, v0);
1574 break;
1575 case sub:
1576 __ pop_d(v1);
1577 __ fsubd(v0, v1, v0);
1578 break;
1579 case mul:
1580 __ pop_d(v1);
1581 __ fmuld(v0, v1, v0);
1582 break;
1583 case div:
1584 __ pop_d(v1);
1585 __ fdivd(v0, v1, v0);
1586 break;
1587 case rem:
1588 __ fmovd(v1, v0);
1589 __ pop_d(v0);
1590 __ call_VM_leaf_base1(CAST_FROM_FN_PTR(address, SharedRuntime::drem),
1591 0, 2, MacroAssembler::ret_type_double);
1592 break;
1593 default:
1594 ShouldNotReachHere();
1595 break;
1596 }
1597 }
1598
1599 void TemplateTable::ineg()
1600 {
1601 transition(itos, itos);
1602 __ negw(r0, r0);
1603
1604 }
1605
1606 void TemplateTable::lneg()
1607 {
1608 transition(ltos, ltos);
1609 __ neg(r0, r0);
1610 }
1611
1612 void TemplateTable::fneg()
1613 {
1614 transition(ftos, ftos);
1615 __ fnegs(v0, v0);
1616 }
1617
1618 void TemplateTable::dneg()
1619 {
1620 transition(dtos, dtos);
1621 __ fnegd(v0, v0);
1622 }
1623
1624 void TemplateTable::iinc()
1625 {
1626 transition(vtos, vtos);
1627 __ load_signed_byte(r1, at_bcp(2)); // get constant
1628 locals_index(r2);
1629 __ ldr(r0, iaddress(r2));
1630 __ addw(r0, r0, r1);
1631 __ str(r0, iaddress(r2));
1632 }
1633
1634 void TemplateTable::wide_iinc()
1635 {
1636 transition(vtos, vtos);
1637 // __ mov(r1, zr);
1638 __ ldrw(r1, at_bcp(2)); // get constant and index
1639 __ rev16(r1, r1);
1640 __ ubfx(r2, r1, 0, 16);
1641 __ neg(r2, r2);
1642 __ sbfx(r1, r1, 16, 16);
1643 __ ldr(r0, iaddress(r2));
1644 __ addw(r0, r0, r1);
1645 __ str(r0, iaddress(r2));
1646 }
1647
1648 void TemplateTable::convert()
1649 {
1650 // Checking
1651 #ifdef ASSERT
1652 {
1653 TosState tos_in = ilgl;
1654 TosState tos_out = ilgl;
1655 switch (bytecode()) {
1656 case Bytecodes::_i2l: // fall through
1657 case Bytecodes::_i2f: // fall through
1658 case Bytecodes::_i2d: // fall through
1659 case Bytecodes::_i2b: // fall through
1660 case Bytecodes::_i2c: // fall through
1661 case Bytecodes::_i2s: tos_in = itos; break;
1662 case Bytecodes::_l2i: // fall through
1663 case Bytecodes::_l2f: // fall through
1664 case Bytecodes::_l2d: tos_in = ltos; break;
1665 case Bytecodes::_f2i: // fall through
1666 case Bytecodes::_f2l: // fall through
1667 case Bytecodes::_f2d: tos_in = ftos; break;
1668 case Bytecodes::_d2i: // fall through
1669 case Bytecodes::_d2l: // fall through
1670 case Bytecodes::_d2f: tos_in = dtos; break;
1671 default : ShouldNotReachHere();
1672 }
1673 switch (bytecode()) {
1674 case Bytecodes::_l2i: // fall through
1675 case Bytecodes::_f2i: // fall through
1676 case Bytecodes::_d2i: // fall through
1677 case Bytecodes::_i2b: // fall through
1678 case Bytecodes::_i2c: // fall through
1679 case Bytecodes::_i2s: tos_out = itos; break;
1680 case Bytecodes::_i2l: // fall through
1681 case Bytecodes::_f2l: // fall through
1682 case Bytecodes::_d2l: tos_out = ltos; break;
1683 case Bytecodes::_i2f: // fall through
1684 case Bytecodes::_l2f: // fall through
1685 case Bytecodes::_d2f: tos_out = ftos; break;
1686 case Bytecodes::_i2d: // fall through
1687 case Bytecodes::_l2d: // fall through
1688 case Bytecodes::_f2d: tos_out = dtos; break;
1689 default : ShouldNotReachHere();
1690 }
1691 transition(tos_in, tos_out);
1692 }
1693 #endif // ASSERT
1694 // static const int64_t is_nan = 0x8000000000000000L;
1695
1696 // Conversion
1697 switch (bytecode()) {
1698 case Bytecodes::_i2l:
1699 __ sxtw(r0, r0);
1700 break;
1701 case Bytecodes::_i2f:
1702 __ scvtfws(v0, r0);
1703 break;
1704 case Bytecodes::_i2d:
1705 __ scvtfwd(v0, r0);
1706 break;
1707 case Bytecodes::_i2b:
1708 __ sxtbw(r0, r0);
1709 break;
1710 case Bytecodes::_i2c:
1711 __ uxthw(r0, r0);
1712 break;
1713 case Bytecodes::_i2s:
1714 __ sxthw(r0, r0);
1715 break;
1716 case Bytecodes::_l2i:
1717 __ uxtw(r0, r0);
1718 break;
1719 case Bytecodes::_l2f:
1720 __ scvtfs(v0, r0);
1721 break;
1722 case Bytecodes::_l2d:
1723 __ scvtfd(v0, r0);
1724 break;
1725 case Bytecodes::_f2i:
1726 {
1727 Label L_Okay;
1728 __ clear_fpsr();
1729 __ fcvtzsw(r0, v0);
1730 __ get_fpsr(r1);
1731 __ cbzw(r1, L_Okay);
1732 __ call_VM_leaf_base1(CAST_FROM_FN_PTR(address, SharedRuntime::f2i),
1733 0, 1, MacroAssembler::ret_type_integral);
1734 __ bind(L_Okay);
1735 }
1736 break;
1737 case Bytecodes::_f2l:
1738 {
1739 Label L_Okay;
1740 __ clear_fpsr();
1741 __ fcvtzs(r0, v0);
1742 __ get_fpsr(r1);
1743 __ cbzw(r1, L_Okay);
1744 __ call_VM_leaf_base1(CAST_FROM_FN_PTR(address, SharedRuntime::f2l),
1745 0, 1, MacroAssembler::ret_type_integral);
1746 __ bind(L_Okay);
1747 }
1748 break;
1749 case Bytecodes::_f2d:
1750 __ fcvts(v0, v0);
1751 break;
1752 case Bytecodes::_d2i:
1753 {
1754 Label L_Okay;
1755 __ clear_fpsr();
1756 __ fcvtzdw(r0, v0);
1757 __ get_fpsr(r1);
1758 __ cbzw(r1, L_Okay);
1759 __ call_VM_leaf_base1(CAST_FROM_FN_PTR(address, SharedRuntime::d2i),
1760 0, 1, MacroAssembler::ret_type_integral);
1761 __ bind(L_Okay);
1762 }
1763 break;
1764 case Bytecodes::_d2l:
1765 {
1766 Label L_Okay;
1767 __ clear_fpsr();
1768 __ fcvtzd(r0, v0);
1769 __ get_fpsr(r1);
1770 __ cbzw(r1, L_Okay);
1771 __ call_VM_leaf_base1(CAST_FROM_FN_PTR(address, SharedRuntime::d2l),
1772 0, 1, MacroAssembler::ret_type_integral);
1773 __ bind(L_Okay);
1774 }
1775 break;
1776 case Bytecodes::_d2f:
1777 __ fcvtd(v0, v0);
1778 break;
1779 default:
1780 ShouldNotReachHere();
1781 }
1782 }
1783
1784 void TemplateTable::lcmp()
1785 {
1786 transition(ltos, itos);
1787 Label done;
1788 __ pop_l(r1);
1789 __ cmp(r1, r0);
1790 __ mov(r0, (u_int64_t)-1L);
1791 __ br(Assembler::LT, done);
1792 // __ mov(r0, 1UL);
1793 // __ csel(r0, r0, zr, Assembler::NE);
1794 // and here is a faster way
1795 __ csinc(r0, zr, zr, Assembler::EQ);
1796 __ bind(done);
1797 }
1798
1799 void TemplateTable::float_cmp(bool is_float, int unordered_result)
1800 {
1801 Label done;
1802 if (is_float) {
1803 // XXX get rid of pop here, use ... reg, mem32
1804 __ pop_f(v1);
1805 __ fcmps(v1, v0);
1806 } else {
1807 // XXX get rid of pop here, use ... reg, mem64
1808 __ pop_d(v1);
1809 __ fcmpd(v1, v0);
1810 }
1811 if (unordered_result < 0) {
1812 // we want -1 for unordered or less than, 0 for equal and 1 for
1813 // greater than.
1814 __ mov(r0, (u_int64_t)-1L);
1815 // for FP LT tests less than or unordered
1816 __ br(Assembler::LT, done);
1817 // install 0 for EQ otherwise 1
1818 __ csinc(r0, zr, zr, Assembler::EQ);
1819 } else {
1820 // we want -1 for less than, 0 for equal and 1 for unordered or
1821 // greater than.
1822 __ mov(r0, 1L);
1823 // for FP HI tests greater than or unordered
1824 __ br(Assembler::HI, done);
1825 // install 0 for EQ otherwise ~0
1826 __ csinv(r0, zr, zr, Assembler::EQ);
1827
1828 }
1829 __ bind(done);
1830 }
1831
1832 void TemplateTable::branch(bool is_jsr, bool is_wide)
1833 {
1834 // We might be moving to a safepoint. The thread which calls
1835 // Interpreter::notice_safepoints() will effectively flush its cache
1836 // when it makes a system call, but we need to do something to
1837 // ensure that we see the changed dispatch table.
1838 __ membar(MacroAssembler::LoadLoad);
1839
1840 __ profile_taken_branch(r0, r1);
1841 const ByteSize be_offset = MethodCounters::backedge_counter_offset() +
1842 InvocationCounter::counter_offset();
1843 const ByteSize inv_offset = MethodCounters::invocation_counter_offset() +
1844 InvocationCounter::counter_offset();
1845
1846 // load branch displacement
1847 if (!is_wide) {
1848 __ ldrh(r2, at_bcp(1));
1849 __ rev16(r2, r2);
1850 // sign extend the 16 bit value in r2
1851 __ sbfm(r2, r2, 0, 15);
1852 } else {
1853 __ ldrw(r2, at_bcp(1));
1854 __ revw(r2, r2);
1855 // sign extend the 32 bit value in r2
1856 __ sbfm(r2, r2, 0, 31);
1857 }
1858
1859 // Handle all the JSR stuff here, then exit.
1860 // It's much shorter and cleaner than intermingling with the non-JSR
1861 // normal-branch stuff occurring below.
1862
1863 if (is_jsr) {
1864 // Pre-load the next target bytecode into rscratch1
1865 __ load_unsigned_byte(rscratch1, Address(rbcp, r2));
1866 // compute return address as bci
1867 __ ldr(rscratch2, Address(rmethod, Method::const_offset()));
1868 __ add(rscratch2, rscratch2,
1869 in_bytes(ConstMethod::codes_offset()) - (is_wide ? 5 : 3));
1870 __ sub(r1, rbcp, rscratch2);
1871 __ push_i(r1);
1872 // Adjust the bcp by the 16-bit displacement in r2
1873 __ add(rbcp, rbcp, r2);
1874 __ dispatch_only(vtos, /*generate_poll*/true);
1875 return;
1876 }
1877
1878 // Normal (non-jsr) branch handling
1879
1880 // Adjust the bcp by the displacement in r2
1881 __ add(rbcp, rbcp, r2);
1882
1883 assert(UseLoopCounter || !UseOnStackReplacement,
1884 "on-stack-replacement requires loop counters");
1885 Label backedge_counter_overflow;
1886 Label profile_method;
1887 Label dispatch;
1888 if (UseLoopCounter) {
1889 // increment backedge counter for backward branches
1890 // r0: MDO
1891 // w1: MDO bumped taken-count
1892 // r2: target offset
1893 __ cmp(r2, zr);
1894 __ br(Assembler::GT, dispatch); // count only if backward branch
1895
1896 // ECN: FIXME: This code smells
1897 // check if MethodCounters exists
1898 Label has_counters;
1899 __ ldr(rscratch1, Address(rmethod, Method::method_counters_offset()));
1900 __ cbnz(rscratch1, has_counters);
1901 __ push(r0);
1902 __ push(r1);
1903 __ push(r2);
1904 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
1905 InterpreterRuntime::build_method_counters), rmethod);
1906 __ pop(r2);
1907 __ pop(r1);
1908 __ pop(r0);
1909 __ ldr(rscratch1, Address(rmethod, Method::method_counters_offset()));
1910 __ cbz(rscratch1, dispatch); // No MethodCounters allocated, OutOfMemory
1911 __ bind(has_counters);
1912
1913 if (TieredCompilation) {
1914 Label no_mdo;
1915 int increment = InvocationCounter::count_increment;
1916 if (ProfileInterpreter) {
1917 // Are we profiling?
1918 __ ldr(r1, Address(rmethod, in_bytes(Method::method_data_offset())));
1919 __ cbz(r1, no_mdo);
1920 // Increment the MDO backedge counter
1921 const Address mdo_backedge_counter(r1, in_bytes(MethodData::backedge_counter_offset()) +
1922 in_bytes(InvocationCounter::counter_offset()));
1923 const Address mask(r1, in_bytes(MethodData::backedge_mask_offset()));
1924 __ increment_mask_and_jump(mdo_backedge_counter, increment, mask,
1925 r0, rscratch1, false, Assembler::EQ,
1926 UseOnStackReplacement ? &backedge_counter_overflow : &dispatch);
1927 __ b(dispatch);
1928 }
1929 __ bind(no_mdo);
1930 // Increment backedge counter in MethodCounters*
1931 __ ldr(rscratch1, Address(rmethod, Method::method_counters_offset()));
1932 const Address mask(rscratch1, in_bytes(MethodCounters::backedge_mask_offset()));
1933 __ increment_mask_and_jump(Address(rscratch1, be_offset), increment, mask,
1934 r0, rscratch2, false, Assembler::EQ,
1935 UseOnStackReplacement ? &backedge_counter_overflow : &dispatch);
1936 } else { // not TieredCompilation
1937 // increment counter
1938 __ ldr(rscratch2, Address(rmethod, Method::method_counters_offset()));
1939 __ ldrw(r0, Address(rscratch2, be_offset)); // load backedge counter
1940 __ addw(rscratch1, r0, InvocationCounter::count_increment); // increment counter
1941 __ strw(rscratch1, Address(rscratch2, be_offset)); // store counter
1942
1943 __ ldrw(r0, Address(rscratch2, inv_offset)); // load invocation counter
1944 __ andw(r0, r0, (unsigned)InvocationCounter::count_mask_value); // and the status bits
1945 __ addw(r0, r0, rscratch1); // add both counters
1946
1947 if (ProfileInterpreter) {
1948 // Test to see if we should create a method data oop
1949 __ ldrw(rscratch1, Address(rscratch2, in_bytes(MethodCounters::interpreter_profile_limit_offset())));
1950 __ cmpw(r0, rscratch1);
1951 __ br(Assembler::LT, dispatch);
1952
1953 // if no method data exists, go to profile method
1954 __ test_method_data_pointer(r0, profile_method);
1955
1956 if (UseOnStackReplacement) {
1957 // check for overflow against w1 which is the MDO taken count
1958 __ ldrw(rscratch1, Address(rscratch2, in_bytes(MethodCounters::interpreter_backward_branch_limit_offset())));
1959 __ cmpw(r1, rscratch1);
1960 __ br(Assembler::LO, dispatch); // Intel == Assembler::below
1961
1962 // When ProfileInterpreter is on, the backedge_count comes
1963 // from the MethodData*, which value does not get reset on
1964 // the call to frequency_counter_overflow(). To avoid
1965 // excessive calls to the overflow routine while the method is
1966 // being compiled, add a second test to make sure the overflow
1967 // function is called only once every overflow_frequency.
1968 const int overflow_frequency = 1024;
1969 __ andsw(r1, r1, overflow_frequency - 1);
1970 __ br(Assembler::EQ, backedge_counter_overflow);
1971
1972 }
1973 } else {
1974 if (UseOnStackReplacement) {
1975 // check for overflow against w0, which is the sum of the
1976 // counters
1977 __ ldrw(rscratch1, Address(rscratch2, in_bytes(MethodCounters::interpreter_backward_branch_limit_offset())));
1978 __ cmpw(r0, rscratch1);
1979 __ br(Assembler::HS, backedge_counter_overflow); // Intel == Assembler::aboveEqual
1980 }
1981 }
1982 }
1983 __ bind(dispatch);
1984 }
1985
1986 // Pre-load the next target bytecode into rscratch1
1987 __ load_unsigned_byte(rscratch1, Address(rbcp, 0));
1988
1989 // continue with the bytecode @ target
1990 // rscratch1: target bytecode
1991 // rbcp: target bcp
1992 __ dispatch_only(vtos, /*generate_poll*/true);
1993
1994 if (UseLoopCounter) {
1995 if (ProfileInterpreter) {
1996 // Out-of-line code to allocate method data oop.
1997 __ bind(profile_method);
1998 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
1999 __ load_unsigned_byte(r1, Address(rbcp, 0)); // restore target bytecode
2000 __ set_method_data_pointer_for_bcp();
2001 __ b(dispatch);
2002 }
2003
2004 if (UseOnStackReplacement) {
2005 // invocation counter overflow
2006 __ bind(backedge_counter_overflow);
2007 __ neg(r2, r2);
2008 __ add(r2, r2, rbcp); // branch bcp
2009 // IcoResult frequency_counter_overflow([JavaThread*], address branch_bcp)
2010 __ call_VM(noreg,
2011 CAST_FROM_FN_PTR(address,
2012 InterpreterRuntime::frequency_counter_overflow),
2013 r2);
2014 __ load_unsigned_byte(r1, Address(rbcp, 0)); // restore target bytecode
2015
2016 // r0: osr nmethod (osr ok) or NULL (osr not possible)
2017 // w1: target bytecode
2018 // r2: scratch
2019 __ cbz(r0, dispatch); // test result -- no osr if null
2020 // nmethod may have been invalidated (VM may block upon call_VM return)
2021 __ ldrb(r2, Address(r0, nmethod::state_offset()));
2022 if (nmethod::in_use != 0)
2023 __ sub(r2, r2, nmethod::in_use);
2024 __ cbnz(r2, dispatch);
2025
2026 // We have the address of an on stack replacement routine in r0
2027 // We need to prepare to execute the OSR method. First we must
2028 // migrate the locals and monitors off of the stack.
2029
2030 __ mov(r19, r0); // save the nmethod
2031
2032 call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_begin));
2033
2034 // r0 is OSR buffer, move it to expected parameter location
2035 __ mov(j_rarg0, r0);
2036
2037 // remove activation
2038 // get sender esp
2039 __ ldr(esp,
2040 Address(rfp, frame::interpreter_frame_sender_sp_offset * wordSize));
2041 // remove frame anchor
2042 __ leave();
2043 // Ensure compiled code always sees stack at proper alignment
2044 __ andr(sp, esp, -16);
2045
2046 // and begin the OSR nmethod
2047 __ ldr(rscratch1, Address(r19, nmethod::osr_entry_point_offset()));
2048 __ br(rscratch1);
2049 }
2050 }
2051 }
2052
2053
2054 void TemplateTable::if_0cmp(Condition cc)
2055 {
2056 transition(itos, vtos);
2057 // assume branch is more often taken than not (loops use backward branches)
2058 Label not_taken;
2059 if (cc == equal)
2060 __ cbnzw(r0, not_taken);
2061 else if (cc == not_equal)
2062 __ cbzw(r0, not_taken);
2063 else {
2064 __ andsw(zr, r0, r0);
2065 __ br(j_not(cc), not_taken);
2066 }
2067
2068 branch(false, false);
2069 __ bind(not_taken);
2070 __ profile_not_taken_branch(r0);
2071 }
2072
2073 void TemplateTable::if_icmp(Condition cc)
2074 {
2075 transition(itos, vtos);
2076 // assume branch is more often taken than not (loops use backward branches)
2077 Label not_taken;
2078 __ pop_i(r1);
2079 __ cmpw(r1, r0, Assembler::LSL);
2080 __ br(j_not(cc), not_taken);
2081 branch(false, false);
2082 __ bind(not_taken);
2083 __ profile_not_taken_branch(r0);
2084 }
2085
2086 void TemplateTable::if_nullcmp(Condition cc)
2087 {
2088 transition(atos, vtos);
2089 // assume branch is more often taken than not (loops use backward branches)
2090 Label not_taken;
2091 if (cc == equal)
2092 __ cbnz(r0, not_taken);
2093 else
2094 __ cbz(r0, not_taken);
2095 branch(false, false);
2096 __ bind(not_taken);
2097 __ profile_not_taken_branch(r0);
2098 }
2099
2100 void TemplateTable::if_acmp(Condition cc)
2101 {
2102 transition(atos, vtos);
2103 // assume branch is more often taken than not (loops use backward branches)
2104 Label taken, not_taken;
2105 __ pop_ptr(r1);
2106 __ cmpoop(r1, r0);
2107
2108 if (EnableValhalla) {
2109 guarantee(UsePointerPerturbation == false, "UsePointerPerturbation is not implemented");
2110
2111 __ br(Assembler::NE, (cc == not_equal) ? taken : not_taken);
2112 __ cbz(r1, (cc == equal) ? taken : not_taken);
2113 __ ldr(r2, Address(r1, oopDesc::mark_offset_in_bytes()));
2114 // DMS CHECK: Is code below correct?
2115 __ andr(r2, r2, markOopDesc::always_locked_pattern && 0xF);
2116 __ cmp(r2, (u1) markOopDesc::always_locked_pattern);
2117 cc = (cc == equal) ? not_equal : equal;
2118 }
2119
2120
2121 __ br(j_not(cc), not_taken);
2122 __ bind(taken);
2123 branch(false, false);
2124 __ bind(not_taken);
2125 __ profile_not_taken_branch(r0);
2126 }
2127
2128 void TemplateTable::ret() {
2129 transition(vtos, vtos);
2130 // We might be moving to a safepoint. The thread which calls
2131 // Interpreter::notice_safepoints() will effectively flush its cache
2132 // when it makes a system call, but we need to do something to
2133 // ensure that we see the changed dispatch table.
2134 __ membar(MacroAssembler::LoadLoad);
2135
2136 locals_index(r1);
2137 __ ldr(r1, aaddress(r1)); // get return bci, compute return bcp
2138 __ profile_ret(r1, r2);
2139 __ ldr(rbcp, Address(rmethod, Method::const_offset()));
2140 __ lea(rbcp, Address(rbcp, r1));
2141 __ add(rbcp, rbcp, in_bytes(ConstMethod::codes_offset()));
2142 __ dispatch_next(vtos, 0, /*generate_poll*/true);
2143 }
2144
2145 void TemplateTable::wide_ret() {
2146 transition(vtos, vtos);
2147 locals_index_wide(r1);
2148 __ ldr(r1, aaddress(r1)); // get return bci, compute return bcp
2149 __ profile_ret(r1, r2);
2150 __ ldr(rbcp, Address(rmethod, Method::const_offset()));
2151 __ lea(rbcp, Address(rbcp, r1));
2152 __ add(rbcp, rbcp, in_bytes(ConstMethod::codes_offset()));
2153 __ dispatch_next(vtos, 0, /*generate_poll*/true);
2154 }
2155
2156
2157 void TemplateTable::tableswitch() {
2158 Label default_case, continue_execution;
2159 transition(itos, vtos);
2160 // align rbcp
2161 __ lea(r1, at_bcp(BytesPerInt));
2162 __ andr(r1, r1, -BytesPerInt);
2163 // load lo & hi
2164 __ ldrw(r2, Address(r1, BytesPerInt));
2165 __ ldrw(r3, Address(r1, 2 * BytesPerInt));
2166 __ rev32(r2, r2);
2167 __ rev32(r3, r3);
2168 // check against lo & hi
2169 __ cmpw(r0, r2);
2170 __ br(Assembler::LT, default_case);
2171 __ cmpw(r0, r3);
2172 __ br(Assembler::GT, default_case);
2173 // lookup dispatch offset
2174 __ subw(r0, r0, r2);
2175 __ lea(r3, Address(r1, r0, Address::uxtw(2)));
2176 __ ldrw(r3, Address(r3, 3 * BytesPerInt));
2177 __ profile_switch_case(r0, r1, r2);
2178 // continue execution
2179 __ bind(continue_execution);
2180 __ rev32(r3, r3);
2181 __ load_unsigned_byte(rscratch1, Address(rbcp, r3, Address::sxtw(0)));
2182 __ add(rbcp, rbcp, r3, ext::sxtw);
2183 __ dispatch_only(vtos, /*generate_poll*/true);
2184 // handle default
2185 __ bind(default_case);
2186 __ profile_switch_default(r0);
2187 __ ldrw(r3, Address(r1, 0));
2188 __ b(continue_execution);
2189 }
2190
2191 void TemplateTable::lookupswitch() {
2192 transition(itos, itos);
2193 __ stop("lookupswitch bytecode should have been rewritten");
2194 }
2195
2196 void TemplateTable::fast_linearswitch() {
2197 transition(itos, vtos);
2198 Label loop_entry, loop, found, continue_execution;
2199 // bswap r0 so we can avoid bswapping the table entries
2200 __ rev32(r0, r0);
2201 // align rbcp
2202 __ lea(r19, at_bcp(BytesPerInt)); // btw: should be able to get rid of
2203 // this instruction (change offsets
2204 // below)
2205 __ andr(r19, r19, -BytesPerInt);
2206 // set counter
2207 __ ldrw(r1, Address(r19, BytesPerInt));
2208 __ rev32(r1, r1);
2209 __ b(loop_entry);
2210 // table search
2211 __ bind(loop);
2212 __ lea(rscratch1, Address(r19, r1, Address::lsl(3)));
2213 __ ldrw(rscratch1, Address(rscratch1, 2 * BytesPerInt));
2214 __ cmpw(r0, rscratch1);
2215 __ br(Assembler::EQ, found);
2216 __ bind(loop_entry);
2217 __ subs(r1, r1, 1);
2218 __ br(Assembler::PL, loop);
2219 // default case
2220 __ profile_switch_default(r0);
2221 __ ldrw(r3, Address(r19, 0));
2222 __ b(continue_execution);
2223 // entry found -> get offset
2224 __ bind(found);
2225 __ lea(rscratch1, Address(r19, r1, Address::lsl(3)));
2226 __ ldrw(r3, Address(rscratch1, 3 * BytesPerInt));
2227 __ profile_switch_case(r1, r0, r19);
2228 // continue execution
2229 __ bind(continue_execution);
2230 __ rev32(r3, r3);
2231 __ add(rbcp, rbcp, r3, ext::sxtw);
2232 __ ldrb(rscratch1, Address(rbcp, 0));
2233 __ dispatch_only(vtos, /*generate_poll*/true);
2234 }
2235
2236 void TemplateTable::fast_binaryswitch() {
2237 transition(itos, vtos);
2238 // Implementation using the following core algorithm:
2239 //
2240 // int binary_search(int key, LookupswitchPair* array, int n) {
2241 // // Binary search according to "Methodik des Programmierens" by
2242 // // Edsger W. Dijkstra and W.H.J. Feijen, Addison Wesley Germany 1985.
2243 // int i = 0;
2244 // int j = n;
2245 // while (i+1 < j) {
2246 // // invariant P: 0 <= i < j <= n and (a[i] <= key < a[j] or Q)
2247 // // with Q: for all i: 0 <= i < n: key < a[i]
2248 // // where a stands for the array and assuming that the (inexisting)
2249 // // element a[n] is infinitely big.
2250 // int h = (i + j) >> 1;
2251 // // i < h < j
2252 // if (key < array[h].fast_match()) {
2253 // j = h;
2254 // } else {
2255 // i = h;
2256 // }
2257 // }
2258 // // R: a[i] <= key < a[i+1] or Q
2259 // // (i.e., if key is within array, i is the correct index)
2260 // return i;
2261 // }
2262
2263 // Register allocation
2264 const Register key = r0; // already set (tosca)
2265 const Register array = r1;
2266 const Register i = r2;
2267 const Register j = r3;
2268 const Register h = rscratch1;
2269 const Register temp = rscratch2;
2270
2271 // Find array start
2272 __ lea(array, at_bcp(3 * BytesPerInt)); // btw: should be able to
2273 // get rid of this
2274 // instruction (change
2275 // offsets below)
2276 __ andr(array, array, -BytesPerInt);
2277
2278 // Initialize i & j
2279 __ mov(i, 0); // i = 0;
2280 __ ldrw(j, Address(array, -BytesPerInt)); // j = length(array);
2281
2282 // Convert j into native byteordering
2283 __ rev32(j, j);
2284
2285 // And start
2286 Label entry;
2287 __ b(entry);
2288
2289 // binary search loop
2290 {
2291 Label loop;
2292 __ bind(loop);
2293 // int h = (i + j) >> 1;
2294 __ addw(h, i, j); // h = i + j;
2295 __ lsrw(h, h, 1); // h = (i + j) >> 1;
2296 // if (key < array[h].fast_match()) {
2297 // j = h;
2298 // } else {
2299 // i = h;
2300 // }
2301 // Convert array[h].match to native byte-ordering before compare
2302 __ ldr(temp, Address(array, h, Address::lsl(3)));
2303 __ rev32(temp, temp);
2304 __ cmpw(key, temp);
2305 // j = h if (key < array[h].fast_match())
2306 __ csel(j, h, j, Assembler::LT);
2307 // i = h if (key >= array[h].fast_match())
2308 __ csel(i, h, i, Assembler::GE);
2309 // while (i+1 < j)
2310 __ bind(entry);
2311 __ addw(h, i, 1); // i+1
2312 __ cmpw(h, j); // i+1 < j
2313 __ br(Assembler::LT, loop);
2314 }
2315
2316 // end of binary search, result index is i (must check again!)
2317 Label default_case;
2318 // Convert array[i].match to native byte-ordering before compare
2319 __ ldr(temp, Address(array, i, Address::lsl(3)));
2320 __ rev32(temp, temp);
2321 __ cmpw(key, temp);
2322 __ br(Assembler::NE, default_case);
2323
2324 // entry found -> j = offset
2325 __ add(j, array, i, ext::uxtx, 3);
2326 __ ldrw(j, Address(j, BytesPerInt));
2327 __ profile_switch_case(i, key, array);
2328 __ rev32(j, j);
2329 __ load_unsigned_byte(rscratch1, Address(rbcp, j, Address::sxtw(0)));
2330 __ lea(rbcp, Address(rbcp, j, Address::sxtw(0)));
2331 __ dispatch_only(vtos, /*generate_poll*/true);
2332
2333 // default case -> j = default offset
2334 __ bind(default_case);
2335 __ profile_switch_default(i);
2336 __ ldrw(j, Address(array, -2 * BytesPerInt));
2337 __ rev32(j, j);
2338 __ load_unsigned_byte(rscratch1, Address(rbcp, j, Address::sxtw(0)));
2339 __ lea(rbcp, Address(rbcp, j, Address::sxtw(0)));
2340 __ dispatch_only(vtos, /*generate_poll*/true);
2341 }
2342
2343
2344 void TemplateTable::_return(TosState state)
2345 {
2346 transition(state, state);
2347 assert(_desc->calls_vm(),
2348 "inconsistent calls_vm information"); // call in remove_activation
2349
2350 if (_desc->bytecode() == Bytecodes::_return_register_finalizer) {
2351 assert(state == vtos, "only valid state");
2352
2353 __ ldr(c_rarg1, aaddress(0));
2354 __ load_klass(r3, c_rarg1);
2355 __ ldrw(r3, Address(r3, Klass::access_flags_offset()));
2356 Label skip_register_finalizer;
2357 __ tbz(r3, exact_log2(JVM_ACC_HAS_FINALIZER), skip_register_finalizer);
2358
2359 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::register_finalizer), c_rarg1);
2360
2361 __ bind(skip_register_finalizer);
2362 }
2363
2364 // Issue a StoreStore barrier after all stores but before return
2365 // from any constructor for any class with a final field. We don't
2366 // know if this is a finalizer, so we always do so.
2367 if (_desc->bytecode() == Bytecodes::_return)
2368 __ membar(MacroAssembler::StoreStore);
2369
2370 // Narrow result if state is itos but result type is smaller.
2371 // Need to narrow in the return bytecode rather than in generate_return_entry
2372 // since compiled code callers expect the result to already be narrowed.
2373 if (state == itos) {
2374 __ narrow(r0);
2375 }
2376
2377 __ remove_activation(state);
2378 __ ret(lr);
2379 }
2380
2381 // ----------------------------------------------------------------------------
2382 // Volatile variables demand their effects be made known to all CPU's
2383 // in order. Store buffers on most chips allow reads & writes to
2384 // reorder; the JMM's ReadAfterWrite.java test fails in -Xint mode
2385 // without some kind of memory barrier (i.e., it's not sufficient that
2386 // the interpreter does not reorder volatile references, the hardware
2387 // also must not reorder them).
2388 //
2389 // According to the new Java Memory Model (JMM):
2390 // (1) All volatiles are serialized wrt to each other. ALSO reads &
2391 // writes act as aquire & release, so:
2392 // (2) A read cannot let unrelated NON-volatile memory refs that
2393 // happen after the read float up to before the read. It's OK for
2394 // non-volatile memory refs that happen before the volatile read to
2395 // float down below it.
2396 // (3) Similar a volatile write cannot let unrelated NON-volatile
2397 // memory refs that happen BEFORE the write float down to after the
2398 // write. It's OK for non-volatile memory refs that happen after the
2399 // volatile write to float up before it.
2400 //
2401 // We only put in barriers around volatile refs (they are expensive),
2402 // not _between_ memory refs (that would require us to track the
2403 // flavor of the previous memory refs). Requirements (2) and (3)
2404 // require some barriers before volatile stores and after volatile
2405 // loads. These nearly cover requirement (1) but miss the
2406 // volatile-store-volatile-load case. This final case is placed after
2407 // volatile-stores although it could just as well go before
2408 // volatile-loads.
2409
2410 void TemplateTable::resolve_cache_and_index(int byte_no,
2411 Register Rcache,
2412 Register index,
2413 size_t index_size) {
2414 const Register temp = r19;
2415 assert_different_registers(Rcache, index, temp);
2416
2417 Label resolved;
2418
2419 Bytecodes::Code code = bytecode();
2420 switch (code) {
2421 case Bytecodes::_nofast_getfield: code = Bytecodes::_getfield; break;
2422 case Bytecodes::_nofast_putfield: code = Bytecodes::_putfield; break;
2423 default: break;
2424 }
2425
2426 assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range");
2427 __ get_cache_and_index_and_bytecode_at_bcp(Rcache, index, temp, byte_no, 1, index_size);
2428 __ subs(zr, temp, (int) code); // have we resolved this bytecode?
2429 __ br(Assembler::EQ, resolved);
2430
2431 // resolve first time through
2432 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_from_cache);
2433 __ mov(temp, (int) code);
2434 __ call_VM(noreg, entry, temp);
2435
2436 // Update registers with resolved info
2437 __ get_cache_and_index_at_bcp(Rcache, index, 1, index_size);
2438 // n.b. unlike x86 Rcache is now rcpool plus the indexed offset
2439 // so all clients ofthis method must be modified accordingly
2440 __ bind(resolved);
2441 }
2442
2443 // The Rcache and index registers must be set before call
2444 // n.b unlike x86 cache already includes the index offset
2445 void TemplateTable::load_field_cp_cache_entry(Register obj,
2446 Register cache,
2447 Register index,
2448 Register off,
2449 Register flags,
2450 bool is_static = false) {
2451 assert_different_registers(cache, index, flags, off);
2452
2453 ByteSize cp_base_offset = ConstantPoolCache::base_offset();
2454 // Field offset
2455 __ ldr(off, Address(cache, in_bytes(cp_base_offset +
2456 ConstantPoolCacheEntry::f2_offset())));
2457 // Flags
2458 __ ldrw(flags, Address(cache, in_bytes(cp_base_offset +
2459 ConstantPoolCacheEntry::flags_offset())));
2460
2461 // klass overwrite register
2462 if (is_static) {
2463 __ ldr(obj, Address(cache, in_bytes(cp_base_offset +
2464 ConstantPoolCacheEntry::f1_offset())));
2465 const int mirror_offset = in_bytes(Klass::java_mirror_offset());
2466 __ ldr(obj, Address(obj, mirror_offset));
2467 __ resolve_oop_handle(obj);
2468 }
2469 }
2470
2471 void TemplateTable::load_invoke_cp_cache_entry(int byte_no,
2472 Register method,
2473 Register itable_index,
2474 Register flags,
2475 bool is_invokevirtual,
2476 bool is_invokevfinal, /*unused*/
2477 bool is_invokedynamic) {
2478 // setup registers
2479 const Register cache = rscratch2;
2480 const Register index = r4;
2481 assert_different_registers(method, flags);
2482 assert_different_registers(method, cache, index);
2483 assert_different_registers(itable_index, flags);
2484 assert_different_registers(itable_index, cache, index);
2485 // determine constant pool cache field offsets
2486 assert(is_invokevirtual == (byte_no == f2_byte), "is_invokevirtual flag redundant");
2487 const int method_offset = in_bytes(
2488 ConstantPoolCache::base_offset() +
2489 (is_invokevirtual
2490 ? ConstantPoolCacheEntry::f2_offset()
2491 : ConstantPoolCacheEntry::f1_offset()));
2492 const int flags_offset = in_bytes(ConstantPoolCache::base_offset() +
2493 ConstantPoolCacheEntry::flags_offset());
2494 // access constant pool cache fields
2495 const int index_offset = in_bytes(ConstantPoolCache::base_offset() +
2496 ConstantPoolCacheEntry::f2_offset());
2497
2498 size_t index_size = (is_invokedynamic ? sizeof(u4) : sizeof(u2));
2499 resolve_cache_and_index(byte_no, cache, index, index_size);
2500 __ ldr(method, Address(cache, method_offset));
2501
2502 if (itable_index != noreg) {
2503 __ ldr(itable_index, Address(cache, index_offset));
2504 }
2505 __ ldrw(flags, Address(cache, flags_offset));
2506 }
2507
2508
2509 // The registers cache and index expected to be set before call.
2510 // Correct values of the cache and index registers are preserved.
2511 void TemplateTable::jvmti_post_field_access(Register cache, Register index,
2512 bool is_static, bool has_tos) {
2513 // do the JVMTI work here to avoid disturbing the register state below
2514 // We use c_rarg registers here because we want to use the register used in
2515 // the call to the VM
2516 if (JvmtiExport::can_post_field_access()) {
2517 // Check to see if a field access watch has been set before we
2518 // take the time to call into the VM.
2519 Label L1;
2520 assert_different_registers(cache, index, r0);
2521 __ lea(rscratch1, ExternalAddress((address) JvmtiExport::get_field_access_count_addr()));
2522 __ ldrw(r0, Address(rscratch1));
2523 __ cbzw(r0, L1);
2524
2525 __ get_cache_and_index_at_bcp(c_rarg2, c_rarg3, 1);
2526 __ lea(c_rarg2, Address(c_rarg2, in_bytes(ConstantPoolCache::base_offset())));
2527
2528 if (is_static) {
2529 __ mov(c_rarg1, zr); // NULL object reference
2530 } else {
2531 __ ldr(c_rarg1, at_tos()); // get object pointer without popping it
2532 __ verify_oop(c_rarg1);
2533 }
2534 // c_rarg1: object pointer or NULL
2535 // c_rarg2: cache entry pointer
2536 // c_rarg3: jvalue object on the stack
2537 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
2538 InterpreterRuntime::post_field_access),
2539 c_rarg1, c_rarg2, c_rarg3);
2540 __ get_cache_and_index_at_bcp(cache, index, 1);
2541 __ bind(L1);
2542 }
2543 }
2544
2545 void TemplateTable::pop_and_check_object(Register r)
2546 {
2547 __ pop_ptr(r);
2548 __ null_check(r); // for field access must check obj.
2549 __ verify_oop(r);
2550 }
2551
2552 void TemplateTable::getfield_or_static(int byte_no, bool is_static, RewriteControl rc)
2553 {
2554 const Register cache = r2;
2555 const Register index = r3;
2556 const Register obj = r4;
2557 const Register off = r19;
2558 const Register flags = r0;
2559 const Register raw_flags = r6;
2560 const Register bc = r4; // uses same reg as obj, so don't mix them
2561
2562 resolve_cache_and_index(byte_no, cache, index, sizeof(u2));
2563 jvmti_post_field_access(cache, index, is_static, false);
2564 load_field_cp_cache_entry(obj, cache, index, off, raw_flags, is_static);
2565
2566 if (!is_static) {
2567 // obj is on the stack
2568 pop_and_check_object(obj);
2569 }
2570
2571 // 8179954: We need to make sure that the code generated for
2572 // volatile accesses forms a sequentially-consistent set of
2573 // operations when combined with STLR and LDAR. Without a leading
2574 // membar it's possible for a simple Dekker test to fail if loads
2575 // use LDR;DMB but stores use STLR. This can happen if C2 compiles
2576 // the stores in one method and we interpret the loads in another.
2577 if (! UseBarriersForVolatile) {
2578 Label notVolatile;
2579 __ tbz(raw_flags, ConstantPoolCacheEntry::is_volatile_shift, notVolatile);
2580 __ membar(MacroAssembler::AnyAny);
2581 __ bind(notVolatile);
2582 }
2583
2584 const Address field(obj, off);
2585
2586 Label Done, notByte, notBool, notInt, notShort, notChar,
2587 notLong, notFloat, notObj, notDouble;
2588
2589 // x86 uses a shift and mask or wings it with a shift plus assert
2590 // the mask is not needed. aarch64 just uses bitfield extract
2591 __ ubfxw(flags, raw_flags, ConstantPoolCacheEntry::tos_state_shift, ConstantPoolCacheEntry::tos_state_bits);
2592
2593 assert(btos == 0, "change code, btos != 0");
2594 __ cbnz(flags, notByte);
2595
2596 // Don't rewrite getstatic, only getfield
2597 if (is_static) rc = may_not_rewrite;
2598
2599 // btos
2600 __ access_load_at(T_BYTE, IN_HEAP, r0, field, noreg, noreg);
2601 __ push(btos);
2602 // Rewrite bytecode to be faster
2603 if (rc == may_rewrite) {
2604 patch_bytecode(Bytecodes::_fast_bgetfield, bc, r1);
2605 }
2606 __ b(Done);
2607
2608 __ bind(notByte);
2609 __ cmp(flags, (u1)ztos);
2610 __ br(Assembler::NE, notBool);
2611
2612 // ztos (same code as btos)
2613 __ access_load_at(T_BOOLEAN, IN_HEAP, r0, field, noreg, noreg);
2614 __ push(ztos);
2615 // Rewrite bytecode to be faster
2616 if (rc == may_rewrite) {
2617 // use btos rewriting, no truncating to t/f bit is needed for getfield.
2618 patch_bytecode(Bytecodes::_fast_bgetfield, bc, r1);
2619 }
2620 __ b(Done);
2621
2622 __ bind(notBool);
2623 __ cmp(flags, (u1)atos);
2624 __ br(Assembler::NE, notObj);
2625 // atos
2626 if (!EnableValhalla) {
2627 do_oop_load(_masm, field, r0, IN_HEAP);
2628 __ push(atos);
2629 if (rc == may_rewrite) {
2630 patch_bytecode(Bytecodes::_fast_agetfield, bc, r1);
2631 }
2632 __ b(Done);
2633 } else { // Valhalla
2634
2635 if (is_static) {
2636 __ load_heap_oop(r0, field);
2637 Label isFlattenable, isUninitialized;
2638 // Issue below if the static field has not been initialized yet
2639 __ test_field_is_flattenable(raw_flags, r10, isFlattenable);
2640 // Not flattenable case
2641 __ push(atos);
2642 __ b(Done);
2643 // Flattenable case, must not return null even if uninitialized
2644 __ bind(isFlattenable);
2645 __ cbz(r0, isUninitialized);
2646 __ push(atos);
2647 __ b(Done);
2648 __ bind(isUninitialized);
2649 __ andw(raw_flags, raw_flags, ConstantPoolCacheEntry::field_index_mask);
2650 __ call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::uninitialized_static_value_field), obj, raw_flags);
2651 __ verify_oop(r0);
2652 __ push(atos);
2653 __ b(Done);
2654 } else {
2655 Label isFlattened, isInitialized, isFlattenable, rewriteFlattenable;
2656 __ test_field_is_flattenable(raw_flags, r10, isFlattenable);
2657 // Non-flattenable field case, also covers the object case
2658 __ load_heap_oop(r0, field);
2659 __ push(atos);
2660 if (rc == may_rewrite) {
2661 patch_bytecode(Bytecodes::_fast_agetfield, bc, r1);
2662 }
2663 __ b(Done);
2664 __ bind(isFlattenable);
2665 __ test_field_is_flattened(raw_flags, r10, isFlattened);
2666 // Non-flattened field case
2667 __ load_heap_oop(r0, field);
2668 __ cbnz(r0, isInitialized);
2669 __ andw(raw_flags, raw_flags, ConstantPoolCacheEntry::field_index_mask);
2670 __ call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::uninitialized_instance_value_field), obj, raw_flags);
2671 __ bind(isInitialized);
2672 __ verify_oop(r0);
2673 __ push(atos);
2674 __ b(rewriteFlattenable);
2675 __ bind(isFlattened);
2676 __ ldr(r10, Address(cache, in_bytes(ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::f1_offset())));
2677 __ andw(raw_flags, raw_flags, ConstantPoolCacheEntry::field_index_mask);
2678 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::read_flattened_field), obj, raw_flags, r10);
2679 __ verify_oop(r0);
2680 __ push(atos);
2681 __ bind(rewriteFlattenable);
2682 if (rc == may_rewrite) {
2683 patch_bytecode(Bytecodes::_fast_qgetfield, bc, r1);
2684 }
2685 __ b(Done);
2686 }
2687 }
2688
2689 __ bind(notObj);
2690 __ cmp(flags, (u1)itos);
2691 __ br(Assembler::NE, notInt);
2692 // itos
2693 __ access_load_at(T_INT, IN_HEAP, r0, field, noreg, noreg);
2694 __ push(itos);
2695 // Rewrite bytecode to be faster
2696 if (rc == may_rewrite) {
2697 patch_bytecode(Bytecodes::_fast_igetfield, bc, r1);
2698 }
2699 __ b(Done);
2700
2701 __ bind(notInt);
2702 __ cmp(flags, (u1)ctos);
2703 __ br(Assembler::NE, notChar);
2704 // ctos
2705 __ access_load_at(T_CHAR, IN_HEAP, r0, field, noreg, noreg);
2706 __ push(ctos);
2707 // Rewrite bytecode to be faster
2708 if (rc == may_rewrite) {
2709 patch_bytecode(Bytecodes::_fast_cgetfield, bc, r1);
2710 }
2711 __ b(Done);
2712
2713 __ bind(notChar);
2714 __ cmp(flags, (u1)stos);
2715 __ br(Assembler::NE, notShort);
2716 // stos
2717 __ access_load_at(T_SHORT, IN_HEAP, r0, field, noreg, noreg);
2718 __ push(stos);
2719 // Rewrite bytecode to be faster
2720 if (rc == may_rewrite) {
2721 patch_bytecode(Bytecodes::_fast_sgetfield, bc, r1);
2722 }
2723 __ b(Done);
2724
2725 __ bind(notShort);
2726 __ cmp(flags, (u1)ltos);
2727 __ br(Assembler::NE, notLong);
2728 // ltos
2729 __ access_load_at(T_LONG, IN_HEAP, r0, field, noreg, noreg);
2730 __ push(ltos);
2731 // Rewrite bytecode to be faster
2732 if (rc == may_rewrite) {
2733 patch_bytecode(Bytecodes::_fast_lgetfield, bc, r1);
2734 }
2735 __ b(Done);
2736
2737 __ bind(notLong);
2738 __ cmp(flags, (u1)ftos);
2739 __ br(Assembler::NE, notFloat);
2740 // ftos
2741 __ access_load_at(T_FLOAT, IN_HEAP, noreg /* ftos */, field, noreg, noreg);
2742 __ push(ftos);
2743 // Rewrite bytecode to be faster
2744 if (rc == may_rewrite) {
2745 patch_bytecode(Bytecodes::_fast_fgetfield, bc, r1);
2746 }
2747 __ b(Done);
2748
2749 __ bind(notFloat);
2750 #ifdef ASSERT
2751 __ cmp(flags, (u1)dtos);
2752 __ br(Assembler::NE, notDouble);
2753 #endif
2754 // dtos
2755 __ access_load_at(T_DOUBLE, IN_HEAP, noreg /* ftos */, field, noreg, noreg);
2756 __ push(dtos);
2757 // Rewrite bytecode to be faster
2758 if (rc == may_rewrite) {
2759 patch_bytecode(Bytecodes::_fast_dgetfield, bc, r1);
2760 }
2761 #ifdef ASSERT
2762 __ b(Done);
2763
2764 __ bind(notDouble);
2765 __ stop("Bad state");
2766 #endif
2767
2768 __ bind(Done);
2769
2770 Label notVolatile;
2771 __ tbz(raw_flags, ConstantPoolCacheEntry::is_volatile_shift, notVolatile);
2772 __ membar(MacroAssembler::LoadLoad | MacroAssembler::LoadStore);
2773 __ bind(notVolatile);
2774 }
2775
2776
2777 void TemplateTable::getfield(int byte_no)
2778 {
2779 getfield_or_static(byte_no, false);
2780 }
2781
2782 void TemplateTable::nofast_getfield(int byte_no) {
2783 getfield_or_static(byte_no, false, may_not_rewrite);
2784 }
2785
2786 void TemplateTable::getstatic(int byte_no)
2787 {
2788 getfield_or_static(byte_no, true);
2789 }
2790
2791 // The registers cache and index expected to be set before call.
2792 // The function may destroy various registers, just not the cache and index registers.
2793 void TemplateTable::jvmti_post_field_mod(Register cache, Register index, bool is_static) {
2794 transition(vtos, vtos);
2795
2796 ByteSize cp_base_offset = ConstantPoolCache::base_offset();
2797
2798 if (JvmtiExport::can_post_field_modification()) {
2799 // Check to see if a field modification watch has been set before
2800 // we take the time to call into the VM.
2801 Label L1;
2802 assert_different_registers(cache, index, r0);
2803 __ lea(rscratch1, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr()));
2804 __ ldrw(r0, Address(rscratch1));
2805 __ cbz(r0, L1);
2806
2807 __ get_cache_and_index_at_bcp(c_rarg2, rscratch1, 1);
2808
2809 if (is_static) {
2810 // Life is simple. Null out the object pointer.
2811 __ mov(c_rarg1, zr);
2812 } else {
2813 // Life is harder. The stack holds the value on top, followed by
2814 // the object. We don't know the size of the value, though; it
2815 // could be one or two words depending on its type. As a result,
2816 // we must find the type to determine where the object is.
2817 __ ldrw(c_rarg3, Address(c_rarg2,
2818 in_bytes(cp_base_offset +
2819 ConstantPoolCacheEntry::flags_offset())));
2820 __ lsr(c_rarg3, c_rarg3,
2821 ConstantPoolCacheEntry::tos_state_shift);
2822 ConstantPoolCacheEntry::verify_tos_state_shift();
2823 Label nope2, done, ok;
2824 __ ldr(c_rarg1, at_tos_p1()); // initially assume a one word jvalue
2825 __ cmpw(c_rarg3, ltos);
2826 __ br(Assembler::EQ, ok);
2827 __ cmpw(c_rarg3, dtos);
2828 __ br(Assembler::NE, nope2);
2829 __ bind(ok);
2830 __ ldr(c_rarg1, at_tos_p2()); // ltos (two word jvalue)
2831 __ bind(nope2);
2832 }
2833 // cache entry pointer
2834 __ add(c_rarg2, c_rarg2, in_bytes(cp_base_offset));
2835 // object (tos)
2836 __ mov(c_rarg3, esp);
2837 // c_rarg1: object pointer set up above (NULL if static)
2838 // c_rarg2: cache entry pointer
2839 // c_rarg3: jvalue object on the stack
2840 __ call_VM(noreg,
2841 CAST_FROM_FN_PTR(address,
2842 InterpreterRuntime::post_field_modification),
2843 c_rarg1, c_rarg2, c_rarg3);
2844 __ get_cache_and_index_at_bcp(cache, index, 1);
2845 __ bind(L1);
2846 }
2847 }
2848
2849 void TemplateTable::putfield_or_static(int byte_no, bool is_static, RewriteControl rc) {
2850 transition(vtos, vtos);
2851
2852 const Register cache = r2;
2853 const Register index = r3;
2854 const Register obj = r2;
2855 const Register off = r19;
2856 const Register flags = r0;
2857 const Register flags2 = r6;
2858 const Register bc = r4;
2859
2860 resolve_cache_and_index(byte_no, cache, index, sizeof(u2));
2861 jvmti_post_field_mod(cache, index, is_static);
2862 load_field_cp_cache_entry(obj, cache, index, off, flags, is_static);
2863
2864 Label Done;
2865 __ mov(r5, flags);
2866
2867 {
2868 Label notVolatile;
2869 __ tbz(r5, ConstantPoolCacheEntry::is_volatile_shift, notVolatile);
2870 __ membar(MacroAssembler::StoreStore);
2871 __ bind(notVolatile);
2872 }
2873
2874 // field address
2875 const Address field(obj, off);
2876
2877 Label notByte, notBool, notInt, notShort, notChar,
2878 notLong, notFloat, notObj, notDouble;
2879
2880 __ mov(flags2, flags);
2881
2882 // x86 uses a shift and mask or wings it with a shift plus assert
2883 // the mask is not needed. aarch64 just uses bitfield extract
2884 __ ubfxw(flags, flags, ConstantPoolCacheEntry::tos_state_shift, ConstantPoolCacheEntry::tos_state_bits);
2885
2886 assert(btos == 0, "change code, btos != 0");
2887 __ cbnz(flags, notByte);
2888
2889 // Don't rewrite putstatic, only putfield
2890 if (is_static) rc = may_not_rewrite;
2891
2892 // btos
2893 {
2894 __ pop(btos);
2895 if (!is_static) pop_and_check_object(obj);
2896 __ access_store_at(T_BYTE, IN_HEAP, field, r0, noreg, noreg);
2897 if (rc == may_rewrite) {
2898 patch_bytecode(Bytecodes::_fast_bputfield, bc, r1, true, byte_no);
2899 }
2900 __ b(Done);
2901 }
2902
2903 __ bind(notByte);
2904 __ cmp(flags, (u1)ztos);
2905 __ br(Assembler::NE, notBool);
2906
2907 // ztos
2908 {
2909 __ pop(ztos);
2910 if (!is_static) pop_and_check_object(obj);
2911 __ access_store_at(T_BOOLEAN, IN_HEAP, field, r0, noreg, noreg);
2912 if (rc == may_rewrite) {
2913 patch_bytecode(Bytecodes::_fast_zputfield, bc, r1, true, byte_no);
2914 }
2915 __ b(Done);
2916 }
2917
2918 __ bind(notBool);
2919 __ cmp(flags, (u1)atos);
2920 __ br(Assembler::NE, notObj);
2921
2922 // atos
2923 {
2924 if (!EnableValhalla) {
2925 __ pop(atos);
2926 if (!is_static) pop_and_check_object(obj);
2927 // Store into the field
2928 do_oop_store(_masm, field, r0, IN_HEAP);
2929 if (rc == may_rewrite) {
2930 patch_bytecode(Bytecodes::_fast_aputfield, bc, r1, true, byte_no);
2931 }
2932 __ b(Done);
2933 } else { // Valhalla
2934
2935 __ pop(atos);
2936 if (is_static) {
2937 Label notFlattenable;
2938 __ test_field_is_not_flattenable(flags2, r10, notFlattenable);
2939 __ null_check(r0);
2940 __ bind(notFlattenable);
2941 do_oop_store(_masm, field, r0, IN_HEAP);
2942 __ b(Done);
2943 } else {
2944 Label isFlattenable, isFlattened, notBuffered, notBuffered2, rewriteNotFlattenable, rewriteFlattenable;
2945 __ test_field_is_flattenable(flags2, r10, isFlattenable);
2946 // Not flattenable case, covers not flattenable values and objects
2947 pop_and_check_object(obj);
2948 // Store into the field
2949 do_oop_store(_masm, field, r0, IN_HEAP);
2950 __ bind(rewriteNotFlattenable);
2951 if (rc == may_rewrite) {
2952 patch_bytecode(Bytecodes::_fast_aputfield, bc, r19, true, byte_no);
2953 }
2954 __ b(Done);
2955 // Implementation of the flattenable semantic
2956 __ bind(isFlattenable);
2957 __ null_check(r0);
2958 __ test_field_is_flattened(flags2, r10, isFlattened);
2959 // Not flattened case
2960 pop_and_check_object(obj);
2961 // Store into the field
2962 do_oop_store(_masm, field, r0, IN_HEAP);
2963 __ b(rewriteFlattenable);
2964 __ bind(isFlattened);
2965 pop_and_check_object(obj);
2966 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::write_flattened_value), r0, off, obj);
2967 __ bind(rewriteFlattenable);
2968 if (rc == may_rewrite) {
2969 patch_bytecode(Bytecodes::_fast_qputfield, bc, r19, true, byte_no);
2970 }
2971 __ b(Done);
2972 }
2973 } // Valhalla
2974 }
2975
2976 __ bind(notObj);
2977 __ cmp(flags, (u1)itos);
2978 __ br(Assembler::NE, notInt);
2979
2980 // itos
2981 {
2982 __ pop(itos);
2983 if (!is_static) pop_and_check_object(obj);
2984 __ access_store_at(T_INT, IN_HEAP, field, r0, noreg, noreg);
2985 if (rc == may_rewrite) {
2986 patch_bytecode(Bytecodes::_fast_iputfield, bc, r1, true, byte_no);
2987 }
2988 __ b(Done);
2989 }
2990
2991 __ bind(notInt);
2992 __ cmp(flags, (u1)ctos);
2993 __ br(Assembler::NE, notChar);
2994
2995 // ctos
2996 {
2997 __ pop(ctos);
2998 if (!is_static) pop_and_check_object(obj);
2999 __ access_store_at(T_CHAR, IN_HEAP, field, r0, noreg, noreg);
3000 if (rc == may_rewrite) {
3001 patch_bytecode(Bytecodes::_fast_cputfield, bc, r1, true, byte_no);
3002 }
3003 __ b(Done);
3004 }
3005
3006 __ bind(notChar);
3007 __ cmp(flags, (u1)stos);
3008 __ br(Assembler::NE, notShort);
3009
3010 // stos
3011 {
3012 __ pop(stos);
3013 if (!is_static) pop_and_check_object(obj);
3014 __ access_store_at(T_SHORT, IN_HEAP, field, r0, noreg, noreg);
3015 if (rc == may_rewrite) {
3016 patch_bytecode(Bytecodes::_fast_sputfield, bc, r1, true, byte_no);
3017 }
3018 __ b(Done);
3019 }
3020
3021 __ bind(notShort);
3022 __ cmp(flags, (u1)ltos);
3023 __ br(Assembler::NE, notLong);
3024
3025 // ltos
3026 {
3027 __ pop(ltos);
3028 if (!is_static) pop_and_check_object(obj);
3029 __ access_store_at(T_LONG, IN_HEAP, field, r0, noreg, noreg);
3030 if (rc == may_rewrite) {
3031 patch_bytecode(Bytecodes::_fast_lputfield, bc, r1, true, byte_no);
3032 }
3033 __ b(Done);
3034 }
3035
3036 __ bind(notLong);
3037 __ cmp(flags, (u1)ftos);
3038 __ br(Assembler::NE, notFloat);
3039
3040 // ftos
3041 {
3042 __ pop(ftos);
3043 if (!is_static) pop_and_check_object(obj);
3044 __ access_store_at(T_FLOAT, IN_HEAP, field, noreg /* ftos */, noreg, noreg);
3045 if (rc == may_rewrite) {
3046 patch_bytecode(Bytecodes::_fast_fputfield, bc, r1, true, byte_no);
3047 }
3048 __ b(Done);
3049 }
3050
3051 __ bind(notFloat);
3052 #ifdef ASSERT
3053 __ cmp(flags, (u1)dtos);
3054 __ br(Assembler::NE, notDouble);
3055 #endif
3056
3057 // dtos
3058 {
3059 __ pop(dtos);
3060 if (!is_static) pop_and_check_object(obj);
3061 __ access_store_at(T_DOUBLE, IN_HEAP, field, noreg /* dtos */, noreg, noreg);
3062 if (rc == may_rewrite) {
3063 patch_bytecode(Bytecodes::_fast_dputfield, bc, r1, true, byte_no);
3064 }
3065 }
3066
3067 #ifdef ASSERT
3068 __ b(Done);
3069
3070 __ bind(notDouble);
3071 __ stop("Bad state");
3072 #endif
3073
3074 __ bind(Done);
3075
3076 {
3077 Label notVolatile;
3078 __ tbz(r5, ConstantPoolCacheEntry::is_volatile_shift, notVolatile);
3079 __ membar(MacroAssembler::StoreLoad);
3080 __ bind(notVolatile);
3081 }
3082 }
3083
3084 void TemplateTable::putfield(int byte_no)
3085 {
3086 putfield_or_static(byte_no, false);
3087 }
3088
3089 void TemplateTable::nofast_putfield(int byte_no) {
3090 putfield_or_static(byte_no, false, may_not_rewrite);
3091 }
3092
3093 void TemplateTable::putstatic(int byte_no) {
3094 putfield_or_static(byte_no, true);
3095 }
3096
3097 void TemplateTable::jvmti_post_fast_field_mod()
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 L2;
3103 __ lea(rscratch1, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr()));
3104 __ ldrw(c_rarg3, Address(rscratch1));
3105 __ cbzw(c_rarg3, L2);
3106 __ pop_ptr(r19); // copy the object pointer from tos
3107 __ verify_oop(r19);
3108 __ push_ptr(r19); // put the object pointer back on tos
3109 // Save tos values before call_VM() clobbers them. Since we have
3110 // to do it for every data type, we use the saved values as the
3111 // jvalue object.
3112 switch (bytecode()) { // load values into the jvalue object
3113 case Bytecodes::_fast_qputfield: //fall through
3114 case Bytecodes::_fast_aputfield: __ push_ptr(r0); break;
3115 case Bytecodes::_fast_bputfield: // fall through
3116 case Bytecodes::_fast_zputfield: // fall through
3117 case Bytecodes::_fast_sputfield: // fall through
3118 case Bytecodes::_fast_cputfield: // fall through
3119 case Bytecodes::_fast_iputfield: __ push_i(r0); break;
3120 case Bytecodes::_fast_dputfield: __ push_d(); break;
3121 case Bytecodes::_fast_fputfield: __ push_f(); break;
3122 case Bytecodes::_fast_lputfield: __ push_l(r0); break;
3123
3124 default:
3125 ShouldNotReachHere();
3126 }
3127 __ mov(c_rarg3, esp); // points to jvalue on the stack
3128 // access constant pool cache entry
3129 __ get_cache_entry_pointer_at_bcp(c_rarg2, r0, 1);
3130 __ verify_oop(r19);
3131 // r19: object pointer copied above
3132 // c_rarg2: cache entry pointer
3133 // c_rarg3: jvalue object on the stack
3134 __ call_VM(noreg,
3135 CAST_FROM_FN_PTR(address,
3136 InterpreterRuntime::post_field_modification),
3137 r19, c_rarg2, c_rarg3);
3138
3139 switch (bytecode()) { // restore tos values
3140 case Bytecodes::_fast_qputfield: //fall through
3141 case Bytecodes::_fast_aputfield: __ pop_ptr(r0); break;
3142 case Bytecodes::_fast_bputfield: // fall through
3143 case Bytecodes::_fast_zputfield: // fall through
3144 case Bytecodes::_fast_sputfield: // fall through
3145 case Bytecodes::_fast_cputfield: // fall through
3146 case Bytecodes::_fast_iputfield: __ pop_i(r0); break;
3147 case Bytecodes::_fast_dputfield: __ pop_d(); break;
3148 case Bytecodes::_fast_fputfield: __ pop_f(); break;
3149 case Bytecodes::_fast_lputfield: __ pop_l(r0); break;
3150 default: break;
3151 }
3152 __ bind(L2);
3153 }
3154 }
3155
3156 void TemplateTable::fast_storefield(TosState state)
3157 {
3158 transition(state, vtos);
3159
3160 ByteSize base = ConstantPoolCache::base_offset();
3161
3162 jvmti_post_fast_field_mod();
3163
3164 // access constant pool cache
3165 __ get_cache_and_index_at_bcp(r2, r1, 1);
3166
3167 // test for volatile with r3
3168 __ ldrw(r3, Address(r2, in_bytes(base +
3169 ConstantPoolCacheEntry::flags_offset())));
3170
3171 // replace index with field offset from cache entry
3172 __ ldr(r1, Address(r2, in_bytes(base + ConstantPoolCacheEntry::f2_offset())));
3173
3174 {
3175 Label notVolatile;
3176 __ tbz(r3, ConstantPoolCacheEntry::is_volatile_shift, notVolatile);
3177 __ membar(MacroAssembler::StoreStore);
3178 __ bind(notVolatile);
3179 }
3180
3181 Label notVolatile;
3182
3183 // Get object from stack
3184 pop_and_check_object(r2);
3185
3186 // field address
3187 const Address field(r2, r1);
3188
3189 // access field
3190 switch (bytecode()) {
3191 case Bytecodes::_fast_qputfield: //fall through
3192 {
3193 Label isFlattened, done;
3194 __ null_check(r0);
3195 __ test_field_is_flattened(r3, r10, isFlattened);
3196 // No Flattened case
3197 do_oop_store(_masm, field, r0, IN_HEAP);
3198 __ b(done);
3199 __ bind(isFlattened);
3200 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::write_flattened_value), r0, r1, r2);
3201 __ bind(done);
3202 }
3203 break;
3204 case Bytecodes::_fast_aputfield:
3205 do_oop_store(_masm, field, r0, IN_HEAP);
3206 break;
3207 case Bytecodes::_fast_lputfield:
3208 __ access_store_at(T_LONG, IN_HEAP, field, r0, noreg, noreg);
3209 break;
3210 case Bytecodes::_fast_iputfield:
3211 __ access_store_at(T_INT, IN_HEAP, field, r0, noreg, noreg);
3212 break;
3213 case Bytecodes::_fast_zputfield:
3214 __ access_store_at(T_BOOLEAN, IN_HEAP, field, r0, noreg, noreg);
3215 break;
3216 case Bytecodes::_fast_bputfield:
3217 __ access_store_at(T_BYTE, IN_HEAP, field, r0, noreg, noreg);
3218 break;
3219 case Bytecodes::_fast_sputfield:
3220 __ access_store_at(T_SHORT, IN_HEAP, field, r0, noreg, noreg);
3221 break;
3222 case Bytecodes::_fast_cputfield:
3223 __ access_store_at(T_CHAR, IN_HEAP, field, r0, noreg, noreg);
3224 break;
3225 case Bytecodes::_fast_fputfield:
3226 __ access_store_at(T_FLOAT, IN_HEAP, field, noreg /* ftos */, noreg, noreg);
3227 break;
3228 case Bytecodes::_fast_dputfield:
3229 __ access_store_at(T_DOUBLE, IN_HEAP, field, noreg /* dtos */, noreg, noreg);
3230 break;
3231 default:
3232 ShouldNotReachHere();
3233 }
3234
3235 {
3236 Label notVolatile;
3237 __ tbz(r3, ConstantPoolCacheEntry::is_volatile_shift, notVolatile);
3238 __ membar(MacroAssembler::StoreLoad);
3239 __ bind(notVolatile);
3240 }
3241 }
3242
3243
3244 void TemplateTable::fast_accessfield(TosState state)
3245 {
3246 transition(atos, state);
3247 // Do the JVMTI work here to avoid disturbing the register state below
3248 if (JvmtiExport::can_post_field_access()) {
3249 // Check to see if a field access watch has been set before we
3250 // take the time to call into the VM.
3251 Label L1;
3252 __ lea(rscratch1, ExternalAddress((address) JvmtiExport::get_field_access_count_addr()));
3253 __ ldrw(r2, Address(rscratch1));
3254 __ cbzw(r2, L1);
3255 // access constant pool cache entry
3256 __ get_cache_entry_pointer_at_bcp(c_rarg2, rscratch2, 1);
3257 __ verify_oop(r0);
3258 __ push_ptr(r0); // save object pointer before call_VM() clobbers it
3259 __ mov(c_rarg1, r0);
3260 // c_rarg1: object pointer copied above
3261 // c_rarg2: cache entry pointer
3262 __ call_VM(noreg,
3263 CAST_FROM_FN_PTR(address,
3264 InterpreterRuntime::post_field_access),
3265 c_rarg1, c_rarg2);
3266 __ pop_ptr(r0); // restore object pointer
3267 __ bind(L1);
3268 }
3269
3270 // access constant pool cache
3271 __ get_cache_and_index_at_bcp(r2, r1, 1);
3272 __ ldr(r1, Address(r2, in_bytes(ConstantPoolCache::base_offset() +
3273 ConstantPoolCacheEntry::f2_offset())));
3274 __ ldrw(r3, Address(r2, in_bytes(ConstantPoolCache::base_offset() +
3275 ConstantPoolCacheEntry::flags_offset())));
3276
3277 // r0: object
3278 __ verify_oop(r0);
3279 __ null_check(r0);
3280 const Address field(r0, r1);
3281
3282 // 8179954: We need to make sure that the code generated for
3283 // volatile accesses forms a sequentially-consistent set of
3284 // operations when combined with STLR and LDAR. Without a leading
3285 // membar it's possible for a simple Dekker test to fail if loads
3286 // use LDR;DMB but stores use STLR. This can happen if C2 compiles
3287 // the stores in one method and we interpret the loads in another.
3288 if (! UseBarriersForVolatile) {
3289 Label notVolatile;
3290 __ tbz(r3, ConstantPoolCacheEntry::is_volatile_shift, notVolatile);
3291 __ membar(MacroAssembler::AnyAny);
3292 __ bind(notVolatile);
3293 }
3294
3295 // access field
3296 switch (bytecode()) {
3297 case Bytecodes::_fast_qgetfield:
3298 {
3299 Label isFlattened, isInitialized, Done;
3300 // DMS CHECK: We don't need to reload multiple times, but stay close to original code
3301 __ ldrw(r10, Address(r2, in_bytes(ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset())));
3302 __ test_field_is_flattened(r10, r10, isFlattened);
3303 // Non-flattened field case
3304 __ mov(r10, r0);
3305 __ load_heap_oop(r0, field);
3306 __ cbnz(r0, isInitialized);
3307 __ mov(r0, r10);
3308 __ ldrw(r10, Address(r2, in_bytes(ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset())));
3309 __ andw(r10, r10, ConstantPoolCacheEntry::field_index_mask);
3310 __ call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::uninitialized_instance_value_field), r0, r10);
3311 __ bind(isInitialized);
3312 __ verify_oop(r0);
3313 __ b(Done);
3314 __ bind(isFlattened);
3315 __ ldrw(r10, Address(r2, in_bytes(ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset())));
3316 __ andw(r10, r10, ConstantPoolCacheEntry::field_index_mask);
3317 __ ldr(r3, Address(r2, in_bytes(ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::f1_offset())));
3318 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::read_flattened_field), r0, r10, r3);
3319 __ verify_oop(r0);
3320 __ bind(Done);
3321 }
3322 break;
3323 case Bytecodes::_fast_agetfield:
3324 do_oop_load(_masm, field, r0, IN_HEAP);
3325 __ verify_oop(r0);
3326 break;
3327 case Bytecodes::_fast_lgetfield:
3328 __ access_load_at(T_LONG, IN_HEAP, r0, field, noreg, noreg);
3329 break;
3330 case Bytecodes::_fast_igetfield:
3331 __ access_load_at(T_INT, IN_HEAP, r0, field, noreg, noreg);
3332 break;
3333 case Bytecodes::_fast_bgetfield:
3334 __ access_load_at(T_BYTE, IN_HEAP, r0, field, noreg, noreg);
3335 break;
3336 case Bytecodes::_fast_sgetfield:
3337 __ access_load_at(T_SHORT, IN_HEAP, r0, field, noreg, noreg);
3338 break;
3339 case Bytecodes::_fast_cgetfield:
3340 __ access_load_at(T_CHAR, IN_HEAP, r0, field, noreg, noreg);
3341 break;
3342 case Bytecodes::_fast_fgetfield:
3343 __ access_load_at(T_FLOAT, IN_HEAP, noreg /* ftos */, field, noreg, noreg);
3344 break;
3345 case Bytecodes::_fast_dgetfield:
3346 __ access_load_at(T_DOUBLE, IN_HEAP, noreg /* dtos */, field, noreg, noreg);
3347 break;
3348 default:
3349 ShouldNotReachHere();
3350 }
3351 {
3352 Label notVolatile;
3353 __ tbz(r3, ConstantPoolCacheEntry::is_volatile_shift, notVolatile);
3354 __ membar(MacroAssembler::LoadLoad | MacroAssembler::LoadStore);
3355 __ bind(notVolatile);
3356 }
3357 }
3358
3359 void TemplateTable::fast_xaccess(TosState state)
3360 {
3361 transition(vtos, state);
3362
3363 // get receiver
3364 __ ldr(r0, aaddress(0));
3365 // access constant pool cache
3366 __ get_cache_and_index_at_bcp(r2, r3, 2);
3367 __ ldr(r1, Address(r2, in_bytes(ConstantPoolCache::base_offset() +
3368 ConstantPoolCacheEntry::f2_offset())));
3369
3370 // 8179954: We need to make sure that the code generated for
3371 // volatile accesses forms a sequentially-consistent set of
3372 // operations when combined with STLR and LDAR. Without a leading
3373 // membar it's possible for a simple Dekker test to fail if loads
3374 // use LDR;DMB but stores use STLR. This can happen if C2 compiles
3375 // the stores in one method and we interpret the loads in another.
3376 if (! UseBarriersForVolatile) {
3377 Label notVolatile;
3378 __ ldrw(r3, Address(r2, in_bytes(ConstantPoolCache::base_offset() +
3379 ConstantPoolCacheEntry::flags_offset())));
3380 __ tbz(r3, ConstantPoolCacheEntry::is_volatile_shift, notVolatile);
3381 __ membar(MacroAssembler::AnyAny);
3382 __ bind(notVolatile);
3383 }
3384
3385 // make sure exception is reported in correct bcp range (getfield is
3386 // next instruction)
3387 __ increment(rbcp);
3388 __ null_check(r0);
3389 switch (state) {
3390 case itos:
3391 __ access_load_at(T_INT, IN_HEAP, r0, Address(r0, r1, Address::lsl(0)), noreg, noreg);
3392 break;
3393 case atos:
3394 do_oop_load(_masm, Address(r0, r1, Address::lsl(0)), r0, IN_HEAP);
3395 __ verify_oop(r0);
3396 break;
3397 case ftos:
3398 __ access_load_at(T_FLOAT, IN_HEAP, noreg /* ftos */, Address(r0, r1, Address::lsl(0)), noreg, noreg);
3399 break;
3400 default:
3401 ShouldNotReachHere();
3402 }
3403
3404 {
3405 Label notVolatile;
3406 __ ldrw(r3, Address(r2, in_bytes(ConstantPoolCache::base_offset() +
3407 ConstantPoolCacheEntry::flags_offset())));
3408 __ tbz(r3, ConstantPoolCacheEntry::is_volatile_shift, notVolatile);
3409 __ membar(MacroAssembler::LoadLoad | MacroAssembler::LoadStore);
3410 __ bind(notVolatile);
3411 }
3412
3413 __ decrement(rbcp);
3414 }
3415
3416
3417
3418 //-----------------------------------------------------------------------------
3419 // Calls
3420
3421 void TemplateTable::count_calls(Register method, Register temp)
3422 {
3423 __ call_Unimplemented();
3424 }
3425
3426 void TemplateTable::prepare_invoke(int byte_no,
3427 Register method, // linked method (or i-klass)
3428 Register index, // itable index, MethodType, etc.
3429 Register recv, // if caller wants to see it
3430 Register flags // if caller wants to test it
3431 ) {
3432 // determine flags
3433 Bytecodes::Code code = bytecode();
3434 const bool is_invokeinterface = code == Bytecodes::_invokeinterface;
3435 const bool is_invokedynamic = code == Bytecodes::_invokedynamic;
3436 const bool is_invokehandle = code == Bytecodes::_invokehandle;
3437 const bool is_invokevirtual = code == Bytecodes::_invokevirtual;
3438 const bool is_invokespecial = code == Bytecodes::_invokespecial;
3439 const bool load_receiver = (recv != noreg);
3440 const bool save_flags = (flags != noreg);
3441 assert(load_receiver == (code != Bytecodes::_invokestatic && code != Bytecodes::_invokedynamic), "");
3442 assert(save_flags == (is_invokeinterface || is_invokevirtual), "need flags for vfinal");
3443 assert(flags == noreg || flags == r3, "");
3444 assert(recv == noreg || recv == r2, "");
3445
3446 // setup registers & access constant pool cache
3447 if (recv == noreg) recv = r2;
3448 if (flags == noreg) flags = r3;
3449 assert_different_registers(method, index, recv, flags);
3450
3451 // save 'interpreter return address'
3452 __ save_bcp();
3453
3454 load_invoke_cp_cache_entry(byte_no, method, index, flags, is_invokevirtual, false, is_invokedynamic);
3455
3456 // maybe push appendix to arguments (just before return address)
3457 if (is_invokedynamic || is_invokehandle) {
3458 Label L_no_push;
3459 __ tbz(flags, ConstantPoolCacheEntry::has_appendix_shift, L_no_push);
3460 // Push the appendix as a trailing parameter.
3461 // This must be done before we get the receiver,
3462 // since the parameter_size includes it.
3463 __ push(r19);
3464 __ mov(r19, index);
3465 assert(ConstantPoolCacheEntry::_indy_resolved_references_appendix_offset == 0, "appendix expected at index+0");
3466 __ load_resolved_reference_at_index(index, r19);
3467 __ pop(r19);
3468 __ push(index); // push appendix (MethodType, CallSite, etc.)
3469 __ bind(L_no_push);
3470 }
3471
3472 // load receiver if needed (note: no return address pushed yet)
3473 if (load_receiver) {
3474 __ andw(recv, flags, ConstantPoolCacheEntry::parameter_size_mask);
3475 // FIXME -- is this actually correct? looks like it should be 2
3476 // const int no_return_pc_pushed_yet = -1; // argument slot correction before we push return address
3477 // const int receiver_is_at_end = -1; // back off one slot to get receiver
3478 // Address recv_addr = __ argument_address(recv, no_return_pc_pushed_yet + receiver_is_at_end);
3479 // __ movptr(recv, recv_addr);
3480 __ add(rscratch1, esp, recv, ext::uxtx, 3); // FIXME: uxtb here?
3481 __ ldr(recv, Address(rscratch1, -Interpreter::expr_offset_in_bytes(1)));
3482 __ verify_oop(recv);
3483 }
3484
3485 // compute return type
3486 // x86 uses a shift and mask or wings it with a shift plus assert
3487 // the mask is not needed. aarch64 just uses bitfield extract
3488 __ ubfxw(rscratch2, flags, ConstantPoolCacheEntry::tos_state_shift, ConstantPoolCacheEntry::tos_state_bits);
3489 // load return address
3490 {
3491 const address table_addr = (address) Interpreter::invoke_return_entry_table_for(code);
3492 __ mov(rscratch1, table_addr);
3493 __ ldr(lr, Address(rscratch1, rscratch2, Address::lsl(3)));
3494 }
3495 }
3496
3497
3498 void TemplateTable::invokevirtual_helper(Register index,
3499 Register recv,
3500 Register flags)
3501 {
3502 // Uses temporary registers r0, r3
3503 assert_different_registers(index, recv, r0, r3);
3504 // Test for an invoke of a final method
3505 Label notFinal;
3506 __ tbz(flags, ConstantPoolCacheEntry::is_vfinal_shift, notFinal);
3507
3508 const Register method = index; // method must be rmethod
3509 assert(method == rmethod,
3510 "methodOop must be rmethod for interpreter calling convention");
3511
3512 // do the call - the index is actually the method to call
3513 // that is, f2 is a vtable index if !is_vfinal, else f2 is a Method*
3514
3515 // It's final, need a null check here!
3516 __ null_check(recv);
3517
3518 // profile this call
3519 __ profile_final_call(r0);
3520 __ profile_arguments_type(r0, method, r4, true);
3521
3522 __ jump_from_interpreted(method, r0);
3523
3524 __ bind(notFinal);
3525
3526 // get receiver klass
3527 __ null_check(recv, oopDesc::klass_offset_in_bytes());
3528 __ load_klass(r0, recv);
3529
3530 // profile this call
3531 __ profile_virtual_call(r0, rlocals, r3);
3532
3533 // get target methodOop & entry point
3534 __ lookup_virtual_method(r0, index, method);
3535 __ profile_arguments_type(r3, method, r4, true);
3536 // FIXME -- this looks completely redundant. is it?
3537 // __ ldr(r3, Address(method, Method::interpreter_entry_offset()));
3538 __ jump_from_interpreted(method, r3);
3539 }
3540
3541 void TemplateTable::invokevirtual(int byte_no)
3542 {
3543 transition(vtos, vtos);
3544 assert(byte_no == f2_byte, "use this argument");
3545
3546 prepare_invoke(byte_no, rmethod, noreg, r2, r3);
3547
3548 // rmethod: index (actually a Method*)
3549 // r2: receiver
3550 // r3: flags
3551
3552 invokevirtual_helper(rmethod, r2, r3);
3553 }
3554
3555 void TemplateTable::invokespecial(int byte_no)
3556 {
3557 transition(vtos, vtos);
3558 assert(byte_no == f1_byte, "use this argument");
3559
3560 prepare_invoke(byte_no, rmethod, noreg, // get f1 Method*
3561 r2); // get receiver also for null check
3562 __ verify_oop(r2);
3563 __ null_check(r2);
3564 // do the call
3565 __ profile_call(r0);
3566 __ profile_arguments_type(r0, rmethod, rbcp, false);
3567 __ jump_from_interpreted(rmethod, r0);
3568 }
3569
3570 void TemplateTable::invokestatic(int byte_no)
3571 {
3572 transition(vtos, vtos);
3573 assert(byte_no == f1_byte, "use this argument");
3574
3575 prepare_invoke(byte_no, rmethod); // get f1 Method*
3576 // do the call
3577 __ profile_call(r0);
3578 __ profile_arguments_type(r0, rmethod, r4, false);
3579 __ jump_from_interpreted(rmethod, r0);
3580 }
3581
3582 void TemplateTable::fast_invokevfinal(int byte_no)
3583 {
3584 __ call_Unimplemented();
3585 }
3586
3587 void TemplateTable::invokeinterface(int byte_no) {
3588 transition(vtos, vtos);
3589 assert(byte_no == f1_byte, "use this argument");
3590
3591 prepare_invoke(byte_no, r0, rmethod, // get f1 Klass*, f2 Method*
3592 r2, r3); // recv, flags
3593
3594 // r0: interface klass (from f1)
3595 // rmethod: method (from f2)
3596 // r2: receiver
3597 // r3: flags
3598
3599 // First check for Object case, then private interface method,
3600 // then regular interface method.
3601
3602 // Special case of invokeinterface called for virtual method of
3603 // java.lang.Object. See cpCache.cpp for details.
3604 Label notObjectMethod;
3605 __ tbz(r3, ConstantPoolCacheEntry::is_forced_virtual_shift, notObjectMethod);
3606
3607 invokevirtual_helper(rmethod, r2, r3);
3608 __ bind(notObjectMethod);
3609
3610 Label no_such_interface;
3611
3612 // Check for private method invocation - indicated by vfinal
3613 Label notVFinal;
3614 __ tbz(r3, ConstantPoolCacheEntry::is_vfinal_shift, notVFinal);
3615
3616 // Get receiver klass into r3 - also a null check
3617 __ null_check(r2, oopDesc::klass_offset_in_bytes());
3618 __ load_klass(r3, r2);
3619
3620 Label subtype;
3621 __ check_klass_subtype(r3, r0, r4, subtype);
3622 // If we get here the typecheck failed
3623 __ b(no_such_interface);
3624 __ bind(subtype);
3625
3626 __ profile_final_call(r0);
3627 __ profile_arguments_type(r0, rmethod, r4, true);
3628 __ jump_from_interpreted(rmethod, r0);
3629
3630 __ bind(notVFinal);
3631
3632 // Get receiver klass into r3 - also a null check
3633 __ restore_locals();
3634 __ null_check(r2, oopDesc::klass_offset_in_bytes());
3635 __ load_klass(r3, r2);
3636
3637 Label no_such_method;
3638
3639 // Preserve method for throw_AbstractMethodErrorVerbose.
3640 __ mov(r16, rmethod);
3641 // Receiver subtype check against REFC.
3642 // Superklass in r0. Subklass in r3. Blows rscratch2, r13
3643 __ lookup_interface_method(// inputs: rec. class, interface, itable index
3644 r3, r0, noreg,
3645 // outputs: scan temp. reg, scan temp. reg
3646 rscratch2, r13,
3647 no_such_interface,
3648 /*return_method=*/false);
3649
3650 // profile this call
3651 __ profile_virtual_call(r3, r13, r19);
3652
3653 // Get declaring interface class from method, and itable index
3654 __ ldr(r0, Address(rmethod, Method::const_offset()));
3655 __ ldr(r0, Address(r0, ConstMethod::constants_offset()));
3656 __ ldr(r0, Address(r0, ConstantPool::pool_holder_offset_in_bytes()));
3657 __ ldrw(rmethod, Address(rmethod, Method::itable_index_offset()));
3658 __ subw(rmethod, rmethod, Method::itable_index_max);
3659 __ negw(rmethod, rmethod);
3660
3661 // Preserve recvKlass for throw_AbstractMethodErrorVerbose.
3662 __ mov(rlocals, r3);
3663 __ lookup_interface_method(// inputs: rec. class, interface, itable index
3664 rlocals, r0, rmethod,
3665 // outputs: method, scan temp. reg
3666 rmethod, r13,
3667 no_such_interface);
3668
3669 // rmethod,: methodOop to call
3670 // r2: receiver
3671 // Check for abstract method error
3672 // Note: This should be done more efficiently via a throw_abstract_method_error
3673 // interpreter entry point and a conditional jump to it in case of a null
3674 // method.
3675 __ cbz(rmethod, no_such_method);
3676
3677 __ profile_arguments_type(r3, rmethod, r13, true);
3678
3679 // do the call
3680 // r2: receiver
3681 // rmethod,: methodOop
3682 __ jump_from_interpreted(rmethod, r3);
3683 __ should_not_reach_here();
3684
3685 // exception handling code follows...
3686 // note: must restore interpreter registers to canonical
3687 // state for exception handling to work correctly!
3688
3689 __ bind(no_such_method);
3690 // throw exception
3691 __ restore_bcp(); // bcp must be correct for exception handler (was destroyed)
3692 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
3693 // Pass arguments for generating a verbose error message.
3694 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodErrorVerbose), r3, r16);
3695 // the call_VM checks for exception, so we should never return here.
3696 __ should_not_reach_here();
3697
3698 __ bind(no_such_interface);
3699 // throw exception
3700 __ restore_bcp(); // bcp must be correct for exception handler (was destroyed)
3701 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
3702 // Pass arguments for generating a verbose error message.
3703 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
3704 InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose), r3, r0);
3705 // the call_VM checks for exception, so we should never return here.
3706 __ should_not_reach_here();
3707 return;
3708 }
3709
3710 void TemplateTable::invokehandle(int byte_no) {
3711 transition(vtos, vtos);
3712 assert(byte_no == f1_byte, "use this argument");
3713
3714 prepare_invoke(byte_no, rmethod, r0, r2);
3715 __ verify_method_ptr(r2);
3716 __ verify_oop(r2);
3717 __ null_check(r2);
3718
3719 // FIXME: profile the LambdaForm also
3720
3721 // r13 is safe to use here as a scratch reg because it is about to
3722 // be clobbered by jump_from_interpreted().
3723 __ profile_final_call(r13);
3724 __ profile_arguments_type(r13, rmethod, r4, true);
3725
3726 __ jump_from_interpreted(rmethod, r0);
3727 }
3728
3729 void TemplateTable::invokedynamic(int byte_no) {
3730 transition(vtos, vtos);
3731 assert(byte_no == f1_byte, "use this argument");
3732
3733 prepare_invoke(byte_no, rmethod, r0);
3734
3735 // r0: CallSite object (from cpool->resolved_references[])
3736 // rmethod: MH.linkToCallSite method (from f2)
3737
3738 // Note: r0_callsite is already pushed by prepare_invoke
3739
3740 // %%% should make a type profile for any invokedynamic that takes a ref argument
3741 // profile this call
3742 __ profile_call(rbcp);
3743 __ profile_arguments_type(r3, rmethod, r13, false);
3744
3745 __ verify_oop(r0);
3746
3747 __ jump_from_interpreted(rmethod, r0);
3748 }
3749
3750
3751 //-----------------------------------------------------------------------------
3752 // Allocation
3753
3754 void TemplateTable::_new() {
3755 transition(vtos, atos);
3756
3757 __ get_unsigned_2_byte_index_at_bcp(r3, 1);
3758 Label slow_case;
3759 Label done;
3760 Label initialize_header;
3761 Label initialize_object; // including clearing the fields
3762
3763 __ get_cpool_and_tags(r4, r0);
3764 // Make sure the class we're about to instantiate has been resolved.
3765 // This is done before loading InstanceKlass to be consistent with the order
3766 // how Constant Pool is updated (see ConstantPool::klass_at_put)
3767 const int tags_offset = Array<u1>::base_offset_in_bytes();
3768 __ lea(rscratch1, Address(r0, r3, Address::lsl(0)));
3769 __ lea(rscratch1, Address(rscratch1, tags_offset));
3770 __ ldarb(rscratch1, rscratch1);
3771 __ cmp(rscratch1, (u1)JVM_CONSTANT_Class);
3772 __ br(Assembler::NE, slow_case);
3773
3774 // get InstanceKlass
3775 __ load_resolved_klass_at_offset(r4, r3, r4, rscratch1);
3776
3777 // make sure klass is initialized & doesn't have finalizer
3778 // make sure klass is fully initialized
3779 __ ldrb(rscratch1, Address(r4, InstanceKlass::init_state_offset()));
3780 __ cmp(rscratch1, (u1)InstanceKlass::fully_initialized);
3781 __ br(Assembler::NE, slow_case);
3782
3783 // get instance_size in InstanceKlass (scaled to a count of bytes)
3784 __ ldrw(r3,
3785 Address(r4,
3786 Klass::layout_helper_offset()));
3787 // test to see if it has a finalizer or is malformed in some way
3788 __ tbnz(r3, exact_log2(Klass::_lh_instance_slow_path_bit), slow_case);
3789
3790 // Allocate the instance:
3791 // If TLAB is enabled:
3792 // Try to allocate in the TLAB.
3793 // If fails, go to the slow path.
3794 // Else If inline contiguous allocations are enabled:
3795 // Try to allocate in eden.
3796 // If fails due to heap end, go to slow path.
3797 //
3798 // If TLAB is enabled OR inline contiguous is enabled:
3799 // Initialize the allocation.
3800 // Exit.
3801 //
3802 // Go to slow path.
3803 const bool allow_shared_alloc =
3804 Universe::heap()->supports_inline_contig_alloc();
3805
3806 if (UseTLAB) {
3807 __ tlab_allocate(r0, r3, 0, noreg, r1, slow_case);
3808
3809 if (ZeroTLAB) {
3810 // the fields have been already cleared
3811 __ b(initialize_header);
3812 } else {
3813 // initialize both the header and fields
3814 __ b(initialize_object);
3815 }
3816 } else {
3817 // Allocation in the shared Eden, if allowed.
3818 //
3819 // r3: instance size in bytes
3820 if (allow_shared_alloc) {
3821 __ eden_allocate(r0, r3, 0, r10, slow_case);
3822 }
3823 }
3824
3825 // If UseTLAB or allow_shared_alloc are true, the object is created above and
3826 // there is an initialize need. Otherwise, skip and go to the slow path.
3827 if (UseTLAB || allow_shared_alloc) {
3828 // The object is initialized before the header. If the object size is
3829 // zero, go directly to the header initialization.
3830 __ bind(initialize_object);
3831 __ sub(r3, r3, sizeof(oopDesc));
3832 __ cbz(r3, initialize_header);
3833
3834 // Initialize object fields
3835 {
3836 __ add(r2, r0, sizeof(oopDesc));
3837 Label loop;
3838 __ bind(loop);
3839 __ str(zr, Address(__ post(r2, BytesPerLong)));
3840 __ sub(r3, r3, BytesPerLong);
3841 __ cbnz(r3, loop);
3842 }
3843
3844 // initialize object header only.
3845 __ bind(initialize_header);
3846 if (UseBiasedLocking) {
3847 __ ldr(rscratch1, Address(r4, Klass::prototype_header_offset()));
3848 } else {
3849 __ mov(rscratch1, (intptr_t)markOopDesc::prototype());
3850 }
3851 __ str(rscratch1, Address(r0, oopDesc::mark_offset_in_bytes()));
3852 __ store_klass_gap(r0, zr); // zero klass gap for compressed oops
3853 __ store_klass(r0, r4); // store klass last
3854
3855 {
3856 SkipIfEqual skip(_masm, &DTraceAllocProbes, false);
3857 // Trigger dtrace event for fastpath
3858 __ push(atos); // save the return value
3859 __ call_VM_leaf(
3860 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc), r0);
3861 __ pop(atos); // restore the return value
3862
3863 }
3864 __ b(done);
3865 }
3866
3867 // slow case
3868 __ bind(slow_case);
3869 __ get_constant_pool(c_rarg1);
3870 __ get_unsigned_2_byte_index_at_bcp(c_rarg2, 1);
3871 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::_new), c_rarg1, c_rarg2);
3872 __ verify_oop(r0);
3873
3874 // continue
3875 __ bind(done);
3876 // Must prevent reordering of stores for object initialization with stores that publish the new object.
3877 __ membar(Assembler::StoreStore);
3878 }
3879
3880 void TemplateTable::defaultvalue() {
3881 transition(vtos, atos);
3882 __ get_unsigned_2_byte_index_at_bcp(c_rarg2, 1);
3883 __ get_constant_pool(c_rarg1);
3884 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::defaultvalue),
3885 c_rarg1, c_rarg2);
3886 __ verify_oop(r0);
3887 // Must prevent reordering of stores for object initialization with stores that publish the new object.
3888 __ membar(Assembler::StoreStore);
3889 }
3890
3891 void TemplateTable::withfield() {
3892 transition(vtos, atos);
3893 resolve_cache_and_index(f2_byte, c_rarg1 /*cache*/, c_rarg2 /*index*/, sizeof(u2));
3894
3895 // n.b. unlike x86 cache is now rcpool plus the indexed offset
3896 // so using rcpool to meet shared code expectations
3897
3898 call_VM(r1, CAST_FROM_FN_PTR(address, InterpreterRuntime::withfield), rcpool);
3899 __ verify_oop(r1);
3900 __ add(esp, esp, r0);
3901 __ mov(r0, r1);
3902 }
3903
3904 void TemplateTable::newarray() {
3905 transition(itos, atos);
3906 __ load_unsigned_byte(c_rarg1, at_bcp(1));
3907 __ mov(c_rarg2, r0);
3908 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::newarray),
3909 c_rarg1, c_rarg2);
3910 // Must prevent reordering of stores for object initialization with stores that publish the new object.
3911 __ membar(Assembler::StoreStore);
3912 }
3913
3914 void TemplateTable::anewarray() {
3915 transition(itos, atos);
3916 __ get_unsigned_2_byte_index_at_bcp(c_rarg2, 1);
3917 __ get_constant_pool(c_rarg1);
3918 __ mov(c_rarg3, r0);
3919 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::anewarray),
3920 c_rarg1, c_rarg2, c_rarg3);
3921 // Must prevent reordering of stores for object initialization with stores that publish the new object.
3922 __ membar(Assembler::StoreStore);
3923 }
3924
3925 void TemplateTable::arraylength() {
3926 transition(atos, itos);
3927 __ null_check(r0, arrayOopDesc::length_offset_in_bytes());
3928 __ ldrw(r0, Address(r0, arrayOopDesc::length_offset_in_bytes()));
3929 }
3930
3931 void TemplateTable::checkcast()
3932 {
3933 transition(atos, atos);
3934 Label done, is_null, ok_is_subtype, quicked, resolved;
3935 __ cbz(r0, is_null);
3936
3937 // Get cpool & tags index
3938 __ get_cpool_and_tags(r2, r3); // r2=cpool, r3=tags array
3939 __ get_unsigned_2_byte_index_at_bcp(r19, 1); // r19=index
3940 // See if bytecode has already been quicked
3941 __ add(rscratch1, r3, Array<u1>::base_offset_in_bytes());
3942 __ lea(r1, Address(rscratch1, r19));
3943 __ ldarb(r1, r1);
3944 __ cmp(r1, (u1)JVM_CONSTANT_Class);
3945 __ br(Assembler::EQ, quicked);
3946
3947 __ push(atos); // save receiver for result, and for GC
3948 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc));
3949 // vm_result_2 has metadata result
3950 __ get_vm_result_2(r0, rthread);
3951 __ pop(r3); // restore receiver
3952 __ b(resolved);
3953
3954 // Get superklass in r0 and subklass in r3
3955 __ bind(quicked);
3956 __ mov(r3, r0); // Save object in r3; r0 needed for subtype check
3957 __ load_resolved_klass_at_offset(r2, r19, r0, rscratch1); // r0 = klass
3958
3959 __ bind(resolved);
3960 __ load_klass(r19, r3);
3961
3962 // Generate subtype check. Blows r2, r5. Object in r3.
3963 // Superklass in r0. Subklass in r19.
3964 __ gen_subtype_check(r19, ok_is_subtype);
3965
3966 // Come here on failure
3967 __ push(r3);
3968 // object is at TOS
3969 __ b(Interpreter::_throw_ClassCastException_entry);
3970
3971 // Come here on success
3972 __ bind(ok_is_subtype);
3973 __ mov(r0, r3); // Restore object in r3
3974
3975 __ b(done);
3976 __ bind(is_null);
3977
3978 // Collect counts on whether this test sees NULLs a lot or not.
3979 if (ProfileInterpreter) {
3980 __ profile_null_seen(r2);
3981 }
3982
3983 if (EnableValhalla) {
3984 // Get cpool & tags index
3985 __ get_cpool_and_tags(r2, r3); // r2=cpool, r3=tags array
3986 __ get_unsigned_2_byte_index_at_bcp(r19, 1); // r19=index
3987 // See if bytecode has already been quicked
3988 __ add(rscratch1, r3, Array<u1>::base_offset_in_bytes());
3989 __ lea(r1, Address(rscratch1, r19));
3990 __ ldarb(r1, r1);
3991 // See if CP entry is a Q-descriptor
3992 __ andr (r1, r1, JVM_CONSTANT_QDESC_BIT);
3993 __ cmp(r1, (u1) JVM_CONSTANT_QDESC_BIT);
3994 __ br(Assembler::NE, done);
3995 __ b(ExternalAddress(Interpreter::_throw_NullPointerException_entry));
3996 }
3997
3998 __ bind(done);
3999 }
4000
4001 void TemplateTable::instanceof() {
4002 transition(atos, itos);
4003 Label done, is_null, ok_is_subtype, quicked, resolved;
4004 __ cbz(r0, is_null);
4005
4006 // Get cpool & tags index
4007 __ get_cpool_and_tags(r2, r3); // r2=cpool, r3=tags array
4008 __ get_unsigned_2_byte_index_at_bcp(r19, 1); // r19=index
4009 // See if bytecode has already been quicked
4010 __ add(rscratch1, r3, Array<u1>::base_offset_in_bytes());
4011 __ lea(r1, Address(rscratch1, r19));
4012 __ ldarb(r1, r1);
4013 __ cmp(r1, (u1)JVM_CONSTANT_Class);
4014 __ br(Assembler::EQ, quicked);
4015
4016 __ push(atos); // save receiver for result, and for GC
4017 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc));
4018 // vm_result_2 has metadata result
4019 __ get_vm_result_2(r0, rthread);
4020 __ pop(r3); // restore receiver
4021 __ verify_oop(r3);
4022 __ load_klass(r3, r3);
4023 __ b(resolved);
4024
4025 // Get superklass in r0 and subklass in r3
4026 __ bind(quicked);
4027 __ load_klass(r3, r0);
4028 __ load_resolved_klass_at_offset(r2, r19, r0, rscratch1);
4029
4030 __ bind(resolved);
4031
4032 // Generate subtype check. Blows r2, r5
4033 // Superklass in r0. Subklass in r3.
4034 __ gen_subtype_check(r3, ok_is_subtype);
4035
4036 // Come here on failure
4037 __ mov(r0, 0);
4038 __ b(done);
4039 // Come here on success
4040 __ bind(ok_is_subtype);
4041 __ mov(r0, 1);
4042
4043 // Collect counts on whether this test sees NULLs a lot or not.
4044 if (ProfileInterpreter) {
4045 __ b(done);
4046 __ bind(is_null);
4047 __ profile_null_seen(r2);
4048 } else {
4049 __ bind(is_null); // same as 'done'
4050 }
4051 __ bind(done);
4052 // r0 = 0: obj == NULL or obj is not an instanceof the specified klass
4053 // r0 = 1: obj != NULL and obj is an instanceof the specified klass
4054 }
4055
4056 //-----------------------------------------------------------------------------
4057 // Breakpoints
4058 void TemplateTable::_breakpoint() {
4059 // Note: We get here even if we are single stepping..
4060 // jbug inists on setting breakpoints at every bytecode
4061 // even if we are in single step mode.
4062
4063 transition(vtos, vtos);
4064
4065 // get the unpatched byte code
4066 __ get_method(c_rarg1);
4067 __ call_VM(noreg,
4068 CAST_FROM_FN_PTR(address,
4069 InterpreterRuntime::get_original_bytecode_at),
4070 c_rarg1, rbcp);
4071 __ mov(r19, r0);
4072
4073 // post the breakpoint event
4074 __ call_VM(noreg,
4075 CAST_FROM_FN_PTR(address, InterpreterRuntime::_breakpoint),
4076 rmethod, rbcp);
4077
4078 // complete the execution of original bytecode
4079 __ mov(rscratch1, r19);
4080 __ dispatch_only_normal(vtos);
4081 }
4082
4083 //-----------------------------------------------------------------------------
4084 // Exceptions
4085
4086 void TemplateTable::athrow() {
4087 transition(atos, vtos);
4088 __ null_check(r0);
4089 __ b(Interpreter::throw_exception_entry());
4090 }
4091
4092 //-----------------------------------------------------------------------------
4093 // Synchronization
4094 //
4095 // Note: monitorenter & exit are symmetric routines; which is reflected
4096 // in the assembly code structure as well
4097 //
4098 // Stack layout:
4099 //
4100 // [expressions ] <--- esp = expression stack top
4101 // ..
4102 // [expressions ]
4103 // [monitor entry] <--- monitor block top = expression stack bot
4104 // ..
4105 // [monitor entry]
4106 // [frame data ] <--- monitor block bot
4107 // ...
4108 // [saved rbp ] <--- rbp
4109 void TemplateTable::monitorenter()
4110 {
4111 transition(atos, vtos);
4112
4113 // check for NULL object
4114 __ null_check(r0);
4115
4116 __ resolve(IS_NOT_NULL, r0);
4117
4118 const Address monitor_block_top(
4119 rfp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
4120 const Address monitor_block_bot(
4121 rfp, frame::interpreter_frame_initial_sp_offset * wordSize);
4122 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
4123
4124 Label allocated;
4125
4126 // initialize entry pointer
4127 __ mov(c_rarg1, zr); // points to free slot or NULL
4128
4129 // find a free slot in the monitor block (result in c_rarg1)
4130 {
4131 Label entry, loop, exit;
4132 __ ldr(c_rarg3, monitor_block_top); // points to current entry,
4133 // starting with top-most entry
4134 __ lea(c_rarg2, monitor_block_bot); // points to word before bottom
4135
4136 __ b(entry);
4137
4138 __ bind(loop);
4139 // check if current entry is used
4140 // if not used then remember entry in c_rarg1
4141 __ ldr(rscratch1, Address(c_rarg3, BasicObjectLock::obj_offset_in_bytes()));
4142 __ cmp(zr, rscratch1);
4143 __ csel(c_rarg1, c_rarg3, c_rarg1, Assembler::EQ);
4144 // check if current entry is for same object
4145 __ cmp(r0, rscratch1);
4146 // if same object then stop searching
4147 __ br(Assembler::EQ, exit);
4148 // otherwise advance to next entry
4149 __ add(c_rarg3, c_rarg3, entry_size);
4150 __ bind(entry);
4151 // check if bottom reached
4152 __ cmp(c_rarg3, c_rarg2);
4153 // if not at bottom then check this entry
4154 __ br(Assembler::NE, loop);
4155 __ bind(exit);
4156 }
4157
4158 __ cbnz(c_rarg1, allocated); // check if a slot has been found and
4159 // if found, continue with that on
4160
4161 // allocate one if there's no free slot
4162 {
4163 Label entry, loop;
4164 // 1. compute new pointers // rsp: old expression stack top
4165 __ ldr(c_rarg1, monitor_block_bot); // c_rarg1: old expression stack bottom
4166 __ sub(esp, esp, entry_size); // move expression stack top
4167 __ sub(c_rarg1, c_rarg1, entry_size); // move expression stack bottom
4168 __ mov(c_rarg3, esp); // set start value for copy loop
4169 __ str(c_rarg1, monitor_block_bot); // set new monitor block bottom
4170
4171 __ sub(sp, sp, entry_size); // make room for the monitor
4172
4173 __ b(entry);
4174 // 2. move expression stack contents
4175 __ bind(loop);
4176 __ ldr(c_rarg2, Address(c_rarg3, entry_size)); // load expression stack
4177 // word from old location
4178 __ str(c_rarg2, Address(c_rarg3, 0)); // and store it at new location
4179 __ add(c_rarg3, c_rarg3, wordSize); // advance to next word
4180 __ bind(entry);
4181 __ cmp(c_rarg3, c_rarg1); // check if bottom reached
4182 __ br(Assembler::NE, loop); // if not at bottom then
4183 // copy next word
4184 }
4185
4186 // call run-time routine
4187 // c_rarg1: points to monitor entry
4188 __ bind(allocated);
4189
4190 // Increment bcp to point to the next bytecode, so exception
4191 // handling for async. exceptions work correctly.
4192 // The object has already been poped from the stack, so the
4193 // expression stack looks correct.
4194 __ increment(rbcp);
4195
4196 // store object
4197 __ str(r0, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes()));
4198 __ lock_object(c_rarg1);
4199
4200 // check to make sure this monitor doesn't cause stack overflow after locking
4201 __ save_bcp(); // in case of exception
4202 __ generate_stack_overflow_check(0);
4203
4204 // The bcp has already been incremented. Just need to dispatch to
4205 // next instruction.
4206 __ dispatch_next(vtos);
4207 }
4208
4209
4210 void TemplateTable::monitorexit()
4211 {
4212 transition(atos, vtos);
4213
4214 // check for NULL object
4215 __ null_check(r0);
4216
4217 __ resolve(IS_NOT_NULL, r0);
4218
4219 const Address monitor_block_top(
4220 rfp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
4221 const Address monitor_block_bot(
4222 rfp, frame::interpreter_frame_initial_sp_offset * wordSize);
4223 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
4224
4225 Label found;
4226
4227 // find matching slot
4228 {
4229 Label entry, loop;
4230 __ ldr(c_rarg1, monitor_block_top); // points to current entry,
4231 // starting with top-most entry
4232 __ lea(c_rarg2, monitor_block_bot); // points to word before bottom
4233 // of monitor block
4234 __ b(entry);
4235
4236 __ bind(loop);
4237 // check if current entry is for same object
4238 __ ldr(rscratch1, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes()));
4239 __ cmp(r0, rscratch1);
4240 // if same object then stop searching
4241 __ br(Assembler::EQ, found);
4242 // otherwise advance to next entry
4243 __ add(c_rarg1, c_rarg1, entry_size);
4244 __ bind(entry);
4245 // check if bottom reached
4246 __ cmp(c_rarg1, c_rarg2);
4247 // if not at bottom then check this entry
4248 __ br(Assembler::NE, loop);
4249 }
4250
4251 // error handling. Unlocking was not block-structured
4252 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
4253 InterpreterRuntime::throw_illegal_monitor_state_exception));
4254 __ should_not_reach_here();
4255
4256 // call run-time routine
4257 __ bind(found);
4258 __ push_ptr(r0); // make sure object is on stack (contract with oopMaps)
4259 __ unlock_object(c_rarg1);
4260 __ pop_ptr(r0); // discard object
4261 }
4262
4263
4264 // Wide instructions
4265 void TemplateTable::wide()
4266 {
4267 __ load_unsigned_byte(r19, at_bcp(1));
4268 __ mov(rscratch1, (address)Interpreter::_wentry_point);
4269 __ ldr(rscratch1, Address(rscratch1, r19, Address::uxtw(3)));
4270 __ br(rscratch1);
4271 }
4272
4273
4274 // Multi arrays
4275 void TemplateTable::multianewarray() {
4276 transition(vtos, atos);
4277 __ load_unsigned_byte(r0, at_bcp(3)); // get number of dimensions
4278 // last dim is on top of stack; we want address of first one:
4279 // first_addr = last_addr + (ndims - 1) * wordSize
4280 __ lea(c_rarg1, Address(esp, r0, Address::uxtw(3)));
4281 __ sub(c_rarg1, c_rarg1, wordSize);
4282 call_VM(r0,
4283 CAST_FROM_FN_PTR(address, InterpreterRuntime::multianewarray),
4284 c_rarg1);
4285 __ load_unsigned_byte(r1, at_bcp(3));
4286 __ lea(esp, Address(esp, r1, Address::uxtw(3)));
4287 }