1 /*
2 * Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "c1/c1_CodeStubs.hpp"
27 #include "c1/c1_FrameMap.hpp"
28 #include "c1/c1_LIRAssembler.hpp"
29 #include "c1/c1_MacroAssembler.hpp"
30 #include "c1/c1_Runtime1.hpp"
31 #include "nativeInst_x86.hpp"
32 #include "oops/objArrayKlass.hpp"
33 #include "runtime/sharedRuntime.hpp"
34 #include "utilities/align.hpp"
35 #include "utilities/macros.hpp"
36 #include "vmreg_x86.inline.hpp"
37
38
39 #define __ ce->masm()->
40
41 float ConversionStub::float_zero = 0.0;
42 double ConversionStub::double_zero = 0.0;
43
44 void ConversionStub::emit_code(LIR_Assembler* ce) {
45 __ bind(_entry);
46 assert(bytecode() == Bytecodes::_f2i || bytecode() == Bytecodes::_d2i, "other conversions do not require stub");
47
48
49 if (input()->is_single_xmm()) {
50 __ comiss(input()->as_xmm_float_reg(),
51 ExternalAddress((address)&float_zero));
52 } else if (input()->is_double_xmm()) {
53 __ comisd(input()->as_xmm_double_reg(),
54 ExternalAddress((address)&double_zero));
55 } else {
56 LP64_ONLY(ShouldNotReachHere());
57 __ push(rax);
58 __ ftst();
59 __ fnstsw_ax();
60 __ sahf();
61 __ pop(rax);
62 }
63
64 Label NaN, do_return;
65 __ jccb(Assembler::parity, NaN);
66 __ jccb(Assembler::below, do_return);
67
68 // input is > 0 -> return maxInt
69 // result register already contains 0x80000000, so subtracting 1 gives 0x7fffffff
70 __ decrement(result()->as_register());
71 __ jmpb(do_return);
72
73 // input is NaN -> return 0
74 __ bind(NaN);
75 __ xorptr(result()->as_register(), result()->as_register());
76
77 __ bind(do_return);
78 __ jmp(_continuation);
79 }
80
81 void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
82 __ bind(_entry);
83 Metadata *m = _method->as_constant_ptr()->as_metadata();
84 ce->store_parameter(m, 1);
85 ce->store_parameter(_bci, 0);
86 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::counter_overflow_id)));
87 ce->add_call_info_here(_info);
88 ce->verify_oop_map(_info);
89 __ jmp(_continuation);
90 }
91
92 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index, LIR_Opr array)
93 : _index(index), _array(array), _throw_index_out_of_bounds_exception(false) {
94 assert(info != NULL, "must have info");
95 _info = new CodeEmitInfo(info);
96 }
97
98 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index)
99 : _index(index), _array(NULL), _throw_index_out_of_bounds_exception(true) {
100 assert(info != NULL, "must have info");
101 _info = new CodeEmitInfo(info);
102 }
103
104 void RangeCheckStub::emit_code(LIR_Assembler* ce) {
105 __ bind(_entry);
106 if (_info->deoptimize_on_exception()) {
107 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
108 __ call(RuntimeAddress(a));
109 ce->add_call_info_here(_info);
110 ce->verify_oop_map(_info);
111 debug_only(__ should_not_reach_here());
112 return;
113 }
114
115 // pass the array index on stack because all registers must be preserved
116 if (_index->is_cpu_register()) {
117 ce->store_parameter(_index->as_register(), 0);
118 } else {
119 ce->store_parameter(_index->as_jint(), 0);
120 }
121 Runtime1::StubID stub_id;
122 if (_throw_index_out_of_bounds_exception) {
123 stub_id = Runtime1::throw_index_exception_id;
124 } else {
125 stub_id = Runtime1::throw_range_check_failed_id;
126 ce->store_parameter(_array->as_pointer_register(), 1);
127 }
128 __ call(RuntimeAddress(Runtime1::entry_for(stub_id)));
129 ce->add_call_info_here(_info);
130 ce->verify_oop_map(_info);
131 debug_only(__ should_not_reach_here());
132 }
133
134 PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) {
135 _info = new CodeEmitInfo(info);
136 }
137
138 void PredicateFailedStub::emit_code(LIR_Assembler* ce) {
139 __ bind(_entry);
140 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
141 __ call(RuntimeAddress(a));
142 ce->add_call_info_here(_info);
143 ce->verify_oop_map(_info);
144 debug_only(__ should_not_reach_here());
145 }
146
147 void DivByZeroStub::emit_code(LIR_Assembler* ce) {
148 if (_offset != -1) {
149 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
150 }
151 __ bind(_entry);
152 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::throw_div0_exception_id)));
153 ce->add_call_info_here(_info);
154 debug_only(__ should_not_reach_here());
155 }
156
157
158 // Implementation of LoadFlattenedArrayStub
159
160 LoadFlattenedArrayStub::LoadFlattenedArrayStub(LIR_Opr array, LIR_Opr index, LIR_Opr result, CodeEmitInfo* info) {
161 _array = array;
162 _index = index;
163 _result = result;
164 // Tell the register allocator that the runtime call will scratch rax.
165 _scratch_reg = FrameMap::rax_oop_opr;
166 _info = new CodeEmitInfo(info);
167 }
168
169 void LoadFlattenedArrayStub::emit_code(LIR_Assembler* ce) {
170 assert(__ rsp_offset() == 0, "frame size should be fixed");
171 __ bind(_entry);
172 ce->store_parameter(_array->as_register(), 1);
173 ce->store_parameter(_index->as_register(), 0);
174 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::load_flattened_array_id)));
175 ce->add_call_info_here(_info);
176 ce->verify_oop_map(_info);
177 if (_result->as_register() != rax) {
178 __ movptr(_result->as_register(), rax);
179 }
180 __ jmp(_continuation);
181 }
182
183
184 // Implementation of StoreFlattenedArrayStub
185
186 StoreFlattenedArrayStub::StoreFlattenedArrayStub(LIR_Opr array, LIR_Opr index, LIR_Opr value, CodeEmitInfo* info) {
187 _array = array;
188 _index = index;
189 _value = value;
190 // Tell the register allocator that the runtime call will scratch rax.
191 _scratch_reg = FrameMap::rax_oop_opr;
192 _info = new CodeEmitInfo(info);
193 }
194
195
196 void StoreFlattenedArrayStub::emit_code(LIR_Assembler* ce) {
197 assert(__ rsp_offset() == 0, "frame size should be fixed");
198 __ bind(_entry);
199 ce->store_parameter(_array->as_register(), 2);
200 ce->store_parameter(_index->as_register(), 1);
201 ce->store_parameter(_value->as_register(), 0);
202 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::store_flattened_array_id)));
203 ce->add_call_info_here(_info);
204 ce->verify_oop_map(_info);
205 __ jmp(_continuation);
206 }
207
208
209 // Implementation of SubstitutabilityCheckStub
210
211 SubstitutabilityCheckStub::SubstitutabilityCheckStub(LIR_Opr left, LIR_Opr right, CodeEmitInfo* info) {
212 _left = left;
213 _right = right;
214 // Tell the register allocator that the runtime call will scratch rax.
215 _scratch_reg = FrameMap::rax_oop_opr;
216 _info = new CodeEmitInfo(info);
217 }
218
219 void SubstitutabilityCheckStub::emit_code(LIR_Assembler* ce) {
220 assert(__ rsp_offset() == 0, "frame size should be fixed");
221 __ bind(_entry);
222 ce->store_parameter(_left->as_register(), 1);
223 ce->store_parameter(_right->as_register(), 0);
224 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::substitutability_check_id)));
225 ce->add_call_info_here(_info);
226 ce->verify_oop_map(_info);
227 __ jmp(_continuation);
228 }
229
230
231 // Implementation of NewInstanceStub
232
233 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {
234 _result = result;
235 _klass = klass;
236 _klass_reg = klass_reg;
237 _info = new CodeEmitInfo(info);
238 assert(stub_id == Runtime1::new_instance_id ||
239 stub_id == Runtime1::fast_new_instance_id ||
240 stub_id == Runtime1::fast_new_instance_init_check_id,
241 "need new_instance id");
242 _stub_id = stub_id;
243 }
244
245
246 void NewInstanceStub::emit_code(LIR_Assembler* ce) {
247 assert(__ rsp_offset() == 0, "frame size should be fixed");
248 __ bind(_entry);
249 __ movptr(rdx, _klass_reg->as_register());
250 __ call(RuntimeAddress(Runtime1::entry_for(_stub_id)));
251 ce->add_call_info_here(_info);
252 ce->verify_oop_map(_info);
253 assert(_result->as_register() == rax, "result must in rax,");
254 __ jmp(_continuation);
255 }
256
257
258 // Implementation of NewTypeArrayStub
259
260 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
261 _klass_reg = klass_reg;
262 _length = length;
263 _result = result;
264 _info = new CodeEmitInfo(info);
265 }
266
267
268 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
269 assert(__ rsp_offset() == 0, "frame size should be fixed");
270 __ bind(_entry);
271 assert(_length->as_register() == rbx, "length must in rbx,");
272 assert(_klass_reg->as_register() == rdx, "klass_reg must in rdx");
273 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_type_array_id)));
274 ce->add_call_info_here(_info);
275 ce->verify_oop_map(_info);
276 assert(_result->as_register() == rax, "result must in rax,");
277 __ jmp(_continuation);
278 }
279
280
281 // Implementation of NewObjectArrayStub
282
283 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result,
284 CodeEmitInfo* info, bool is_value_type) {
285 _klass_reg = klass_reg;
286 _result = result;
287 _length = length;
288 _info = new CodeEmitInfo(info);
289 _is_value_type = is_value_type;
290 }
291
292
293 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
294 assert(__ rsp_offset() == 0, "frame size should be fixed");
295 __ bind(_entry);
296 assert(_length->as_register() == rbx, "length must in rbx,");
297 assert(_klass_reg->as_register() == rdx, "klass_reg must in rdx");
298 if (_is_value_type) {
299 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_value_array_id)));
300 } else {
301 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_object_array_id)));
302 }
303 ce->add_call_info_here(_info);
304 ce->verify_oop_map(_info);
305 assert(_result->as_register() == rax, "result must in rax,");
306 __ jmp(_continuation);
307 }
308
309
310 // Implementation of MonitorAccessStubs
311
312 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info, CodeStub* throw_imse_stub, LIR_Opr scratch_reg)
313 : MonitorAccessStub(obj_reg, lock_reg)
314 {
315 _info = new CodeEmitInfo(info);
316 _throw_imse_stub = throw_imse_stub;
317 _scratch_reg = scratch_reg;
318 if (_throw_imse_stub != NULL) {
319 assert(_scratch_reg != LIR_OprFact::illegalOpr, "must be");
320 }
321 }
322
323
324 void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
325 assert(__ rsp_offset() == 0, "frame size should be fixed");
326 __ bind(_entry);
327 if (_throw_imse_stub != NULL) {
328 // When we come here, _obj_reg has already been checked to be non-null.
329 const int is_value_mask = markOopDesc::always_locked_pattern;
330 Register mark = _scratch_reg->as_register();
331 __ movptr(mark, Address(_obj_reg->as_register(), oopDesc::mark_offset_in_bytes()));
332 __ andptr(mark, is_value_mask);
333 __ cmpl(mark, is_value_mask);
334 __ jcc(Assembler::equal, *_throw_imse_stub->entry());
335 }
336 ce->store_parameter(_obj_reg->as_register(), 1);
337 ce->store_parameter(_lock_reg->as_register(), 0);
338 Runtime1::StubID enter_id;
339 if (ce->compilation()->has_fpu_code()) {
340 enter_id = Runtime1::monitorenter_id;
341 } else {
342 enter_id = Runtime1::monitorenter_nofpu_id;
343 }
344 __ call(RuntimeAddress(Runtime1::entry_for(enter_id)));
345 ce->add_call_info_here(_info);
346 ce->verify_oop_map(_info);
347 __ jmp(_continuation);
348 }
349
350
351 void MonitorExitStub::emit_code(LIR_Assembler* ce) {
352 __ bind(_entry);
353 if (_compute_lock) {
354 // lock_reg was destroyed by fast unlocking attempt => recompute it
355 ce->monitor_address(_monitor_ix, _lock_reg);
356 }
357 ce->store_parameter(_lock_reg->as_register(), 0);
358 // note: non-blocking leaf routine => no call info needed
359 Runtime1::StubID exit_id;
360 if (ce->compilation()->has_fpu_code()) {
361 exit_id = Runtime1::monitorexit_id;
362 } else {
363 exit_id = Runtime1::monitorexit_nofpu_id;
364 }
365 __ call(RuntimeAddress(Runtime1::entry_for(exit_id)));
366 __ jmp(_continuation);
367 }
368
369
370 // Implementation of patching:
371 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
372 // - Replace original code with a call to the stub
373 // At Runtime:
374 // - call to stub, jump to runtime
375 // - in runtime: preserve all registers (rspecially objects, i.e., source and destination object)
376 // - in runtime: after initializing class, restore original code, reexecute instruction
377
378 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;
379
380 void PatchingStub::align_patch_site(MacroAssembler* masm) {
381 // We're patching a 5-7 byte instruction on intel and we need to
382 // make sure that we don't see a piece of the instruction. It
383 // appears mostly impossible on Intel to simply invalidate other
384 // processors caches and since they may do aggressive prefetch it's
385 // very hard to make a guess about what code might be in the icache.
386 // Force the instruction to be double word aligned so that it
387 // doesn't span a cache line.
388 masm->align(align_up((int)NativeGeneralJump::instruction_size, wordSize));
389 }
390
391 void PatchingStub::emit_code(LIR_Assembler* ce) {
392 assert(NativeCall::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF, "not enough room for call");
393
394 Label call_patch;
395
396 // static field accesses have special semantics while the class
397 // initializer is being run so we emit a test which can be used to
398 // check that this code is being executed by the initializing
399 // thread.
400 address being_initialized_entry = __ pc();
401 if (CommentedAssembly) {
402 __ block_comment(" patch template");
403 }
404 if (_id == load_klass_id) {
405 // produce a copy of the load klass instruction for use by the being initialized case
406 #ifdef ASSERT
407 address start = __ pc();
408 #endif
409 Metadata* o = NULL;
410 __ mov_metadata(_obj, o);
411 #ifdef ASSERT
412 for (int i = 0; i < _bytes_to_copy; i++) {
413 address ptr = (address)(_pc_start + i);
414 int a_byte = (*ptr) & 0xFF;
415 assert(a_byte == *start++, "should be the same code");
416 }
417 #endif
418 } else if (_id == load_mirror_id) {
419 // produce a copy of the load mirror instruction for use by the being
420 // initialized case
421 #ifdef ASSERT
422 address start = __ pc();
423 #endif
424 jobject o = NULL;
425 __ movoop(_obj, o);
426 #ifdef ASSERT
427 for (int i = 0; i < _bytes_to_copy; i++) {
428 address ptr = (address)(_pc_start + i);
429 int a_byte = (*ptr) & 0xFF;
430 assert(a_byte == *start++, "should be the same code");
431 }
432 #endif
433 } else {
434 // make a copy the code which is going to be patched.
435 for (int i = 0; i < _bytes_to_copy; i++) {
436 address ptr = (address)(_pc_start + i);
437 int a_byte = (*ptr) & 0xFF;
438 __ emit_int8(a_byte);
439 *ptr = 0x90; // make the site look like a nop
440 }
441 }
442
443 address end_of_patch = __ pc();
444 int bytes_to_skip = 0;
445 if (_id == load_mirror_id) {
446 int offset = __ offset();
447 if (CommentedAssembly) {
448 __ block_comment(" being_initialized check");
449 }
450 assert(_obj != noreg, "must be a valid register");
451 Register tmp = rax;
452 Register tmp2 = rbx;
453 __ push(tmp);
454 __ push(tmp2);
455 // Load without verification to keep code size small. We need it because
456 // begin_initialized_entry_offset has to fit in a byte. Also, we know it's not null.
457 __ movptr(tmp2, Address(_obj, java_lang_Class::klass_offset_in_bytes()));
458 __ get_thread(tmp);
459 __ cmpptr(tmp, Address(tmp2, InstanceKlass::init_thread_offset()));
460 __ pop(tmp2);
461 __ pop(tmp);
462 __ jcc(Assembler::notEqual, call_patch);
463
464 // access_field patches may execute the patched code before it's
465 // copied back into place so we need to jump back into the main
466 // code of the nmethod to continue execution.
467 __ jmp(_patch_site_continuation);
468
469 // make sure this extra code gets skipped
470 bytes_to_skip += __ offset() - offset;
471 }
472 if (CommentedAssembly) {
473 __ block_comment("patch data encoded as movl");
474 }
475 // Now emit the patch record telling the runtime how to find the
476 // pieces of the patch. We only need 3 bytes but for readability of
477 // the disassembly we make the data look like a movl reg, imm32,
478 // which requires 5 bytes
479 int sizeof_patch_record = 5;
480 bytes_to_skip += sizeof_patch_record;
481
482 // emit the offsets needed to find the code to patch
483 int being_initialized_entry_offset = __ pc() - being_initialized_entry + sizeof_patch_record;
484
485 __ emit_int8((unsigned char)0xB8);
486 __ emit_int8(0);
487 __ emit_int8(being_initialized_entry_offset);
488 __ emit_int8(bytes_to_skip);
489 __ emit_int8(_bytes_to_copy);
490 address patch_info_pc = __ pc();
491 assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info");
492
493 address entry = __ pc();
494 NativeGeneralJump::insert_unconditional((address)_pc_start, entry);
495 address target = NULL;
496 relocInfo::relocType reloc_type = relocInfo::none;
497 switch (_id) {
498 case access_field_id: target = Runtime1::entry_for(Runtime1::access_field_patching_id); break;
499 case load_klass_id: target = Runtime1::entry_for(Runtime1::load_klass_patching_id); reloc_type = relocInfo::metadata_type; break;
500 case load_mirror_id: target = Runtime1::entry_for(Runtime1::load_mirror_patching_id); reloc_type = relocInfo::oop_type; break;
501 case load_appendix_id: target = Runtime1::entry_for(Runtime1::load_appendix_patching_id); reloc_type = relocInfo::oop_type; break;
502 default: ShouldNotReachHere();
503 }
504 __ bind(call_patch);
505
506 if (CommentedAssembly) {
507 __ block_comment("patch entry point");
508 }
509 __ call(RuntimeAddress(target));
510 assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change");
511 ce->add_call_info_here(_info);
512 int jmp_off = __ offset();
513 __ jmp(_patch_site_entry);
514 // Add enough nops so deoptimization can overwrite the jmp above with a call
515 // and not destroy the world. We cannot use fat nops here, since the concurrent
516 // code rewrite may transiently create the illegal instruction sequence.
517 for (int j = __ offset() ; j < jmp_off + 5 ; j++ ) {
518 __ nop();
519 }
520 if (_id == load_klass_id || _id == load_mirror_id || _id == load_appendix_id) {
521 CodeSection* cs = __ code_section();
522 RelocIterator iter(cs, (address)_pc_start, (address)(_pc_start + 1));
523 relocInfo::change_reloc_info_for_address(&iter, (address) _pc_start, reloc_type, relocInfo::none);
524 }
525 }
526
527
528 void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
529 __ bind(_entry);
530 ce->store_parameter(_trap_request, 0);
531 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::deoptimize_id)));
532 ce->add_call_info_here(_info);
533 DEBUG_ONLY(__ should_not_reach_here());
534 }
535
536
537 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
538 address a;
539 if (_info->deoptimize_on_exception()) {
540 // Deoptimize, do not throw the exception, because it is probably wrong to do it here.
541 a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
542 } else {
543 a = Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id);
544 }
545
546 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
547 __ bind(_entry);
548 __ call(RuntimeAddress(a));
549 ce->add_call_info_here(_info);
550 ce->verify_oop_map(_info);
551 debug_only(__ should_not_reach_here());
552 }
553
554
555 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
556 assert(__ rsp_offset() == 0, "frame size should be fixed");
557
558 __ bind(_entry);
559 // pass the object on stack because all registers must be preserved
560 if (_obj->is_cpu_register()) {
561 ce->store_parameter(_obj->as_register(), 0);
562 }
563 __ call(RuntimeAddress(Runtime1::entry_for(_stub)));
564 ce->add_call_info_here(_info);
565 debug_only(__ should_not_reach_here());
566 }
567
568
569 void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
570 //---------------slow case: call to native-----------------
571 __ bind(_entry);
572 // Figure out where the args should go
573 // This should really convert the IntrinsicID to the Method* and signature
574 // but I don't know how to do that.
575 //
576 VMRegPair args[5];
577 BasicType signature[5] = { T_OBJECT, T_INT, T_OBJECT, T_INT, T_INT};
578 SharedRuntime::java_calling_convention(signature, args, 5, true);
579
580 // push parameters
581 // (src, src_pos, dest, destPos, length)
582 Register r[5];
583 r[0] = src()->as_register();
584 r[1] = src_pos()->as_register();
585 r[2] = dst()->as_register();
586 r[3] = dst_pos()->as_register();
587 r[4] = length()->as_register();
588
589 // next registers will get stored on the stack
590 for (int i = 0; i < 5 ; i++ ) {
591 VMReg r_1 = args[i].first();
592 if (r_1->is_stack()) {
593 int st_off = r_1->reg2stack() * wordSize;
594 __ movptr (Address(rsp, st_off), r[i]);
595 } else {
596 assert(r[i] == args[i].first()->as_Register(), "Wrong register for arg ");
597 }
598 }
599
600 ce->align_call(lir_static_call);
601
602 ce->emit_static_call_stub();
603 if (ce->compilation()->bailed_out()) {
604 return; // CodeCache is full
605 }
606 AddressLiteral resolve(SharedRuntime::get_resolve_static_call_stub(),
607 relocInfo::static_call_type);
608 __ call(resolve);
609 ce->add_call_info_here(info());
610
611 #ifndef PRODUCT
612 __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_slowcase_cnt));
613 #endif
614
615 __ jmp(_continuation);
616 }
617
618 #undef __