code_generator_x86.cc revision 988939683c26c0b1c8808fc206add6337319509a 
1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "code_generator_x86.h"
18
19#include "entrypoints/quick/quick_entrypoints.h"
20#include "gc/accounting/card_table.h"
21#include "mirror/array-inl.h"
22#include "mirror/art_method.h"
23#include "mirror/class.h"
24#include "thread.h"
25#include "utils/assembler.h"
26#include "utils/stack_checks.h"
27#include "utils/x86/assembler_x86.h"
28#include "utils/x86/managed_register_x86.h"
29
30namespace art {
31
32namespace x86 {
33
34static constexpr int kNumberOfPushedRegistersAtEntry = 1;
35static constexpr int kCurrentMethodStackOffset = 0;
36
37static constexpr Register kRuntimeParameterCoreRegisters[] = { EAX, ECX, EDX, EBX };
38static constexpr size_t kRuntimeParameterCoreRegistersLength =
39    arraysize(kRuntimeParameterCoreRegisters);
40static constexpr XmmRegister kRuntimeParameterFpuRegisters[] = { };
41static constexpr size_t kRuntimeParameterFpuRegistersLength = 0;
42
43static constexpr int kC2ConditionMask = 0x400;
44
45// Marker for places that can be updated once we don't follow the quick ABI.
46static constexpr bool kFollowsQuickABI = true;
47
48class InvokeRuntimeCallingConvention : public CallingConvention<Register, XmmRegister> {
49 public:
50  InvokeRuntimeCallingConvention()
51      : CallingConvention(kRuntimeParameterCoreRegisters,
52                          kRuntimeParameterCoreRegistersLength,
53                          kRuntimeParameterFpuRegisters,
54                          kRuntimeParameterFpuRegistersLength) {}
55
56 private:
57  DISALLOW_COPY_AND_ASSIGN(InvokeRuntimeCallingConvention);
58};
59
60#define __ reinterpret_cast<X86Assembler*>(codegen->GetAssembler())->
61
62class SlowPathCodeX86 : public SlowPathCode {
63 public:
64  SlowPathCodeX86() : entry_label_(), exit_label_() {}
65
66  Label* GetEntryLabel() { return &entry_label_; }
67  Label* GetExitLabel() { return &exit_label_; }
68
69 private:
70  Label entry_label_;
71  Label exit_label_;
72
73  DISALLOW_COPY_AND_ASSIGN(SlowPathCodeX86);
74};
75
76class NullCheckSlowPathX86 : public SlowPathCodeX86 {
77 public:
78  explicit NullCheckSlowPathX86(HNullCheck* instruction) : instruction_(instruction) {}
79
80  virtual void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
81    __ Bind(GetEntryLabel());
82    __ fs()->call(Address::Absolute(QUICK_ENTRYPOINT_OFFSET(kX86WordSize, pThrowNullPointer)));
83    codegen->RecordPcInfo(instruction_, instruction_->GetDexPc());
84  }
85
86 private:
87  HNullCheck* const instruction_;
88  DISALLOW_COPY_AND_ASSIGN(NullCheckSlowPathX86);
89};
90
91class DivZeroCheckSlowPathX86 : public SlowPathCodeX86 {
92 public:
93  explicit DivZeroCheckSlowPathX86(HDivZeroCheck* instruction) : instruction_(instruction) {}
94
95  virtual void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
96    __ Bind(GetEntryLabel());
97    __ fs()->call(Address::Absolute(QUICK_ENTRYPOINT_OFFSET(kX86WordSize, pThrowDivZero)));
98    codegen->RecordPcInfo(instruction_, instruction_->GetDexPc());
99  }
100
101 private:
102  HDivZeroCheck* const instruction_;
103  DISALLOW_COPY_AND_ASSIGN(DivZeroCheckSlowPathX86);
104};
105
106class DivRemMinusOneSlowPathX86 : public SlowPathCodeX86 {
107 public:
108  explicit DivRemMinusOneSlowPathX86(Register reg, bool is_div) : reg_(reg), is_div_(is_div) {}
109
110  virtual void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
111    __ Bind(GetEntryLabel());
112    if (is_div_) {
113      __ negl(reg_);
114    } else {
115      __ movl(reg_, Immediate(0));
116    }
117    __ jmp(GetExitLabel());
118  }
119
120 private:
121  Register reg_;
122  bool is_div_;
123  DISALLOW_COPY_AND_ASSIGN(DivRemMinusOneSlowPathX86);
124};
125
126class StackOverflowCheckSlowPathX86 : public SlowPathCodeX86 {
127 public:
128  StackOverflowCheckSlowPathX86() {}
129
130  virtual void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
131    __ Bind(GetEntryLabel());
132    __ addl(ESP,
133            Immediate(codegen->GetFrameSize() - kNumberOfPushedRegistersAtEntry * kX86WordSize));
134    __ fs()->jmp(Address::Absolute(QUICK_ENTRYPOINT_OFFSET(kX86WordSize, pThrowStackOverflow)));
135  }
136
137 private:
138  DISALLOW_COPY_AND_ASSIGN(StackOverflowCheckSlowPathX86);
139};
140
141class BoundsCheckSlowPathX86 : public SlowPathCodeX86 {
142 public:
143  BoundsCheckSlowPathX86(HBoundsCheck* instruction,
144                         Location index_location,
145                         Location length_location)
146      : instruction_(instruction),
147        index_location_(index_location),
148        length_location_(length_location) {}
149
150  virtual void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
151    CodeGeneratorX86* x86_codegen = down_cast<CodeGeneratorX86*>(codegen);
152    __ Bind(GetEntryLabel());
153    // We're moving two locations to locations that could overlap, so we need a parallel
154    // move resolver.
155    InvokeRuntimeCallingConvention calling_convention;
156    x86_codegen->EmitParallelMoves(
157        index_location_,
158        Location::RegisterLocation(calling_convention.GetRegisterAt(0)),
159        length_location_,
160        Location::RegisterLocation(calling_convention.GetRegisterAt(1)));
161    __ fs()->call(Address::Absolute(QUICK_ENTRYPOINT_OFFSET(kX86WordSize, pThrowArrayBounds)));
162    codegen->RecordPcInfo(instruction_, instruction_->GetDexPc());
163  }
164
165 private:
166  HBoundsCheck* const instruction_;
167  const Location index_location_;
168  const Location length_location_;
169
170  DISALLOW_COPY_AND_ASSIGN(BoundsCheckSlowPathX86);
171};
172
173class SuspendCheckSlowPathX86 : public SlowPathCodeX86 {
174 public:
175  explicit SuspendCheckSlowPathX86(HSuspendCheck* instruction, HBasicBlock* successor)
176      : instruction_(instruction), successor_(successor) {}
177
178  virtual void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
179    CodeGeneratorX86* x86_codegen = down_cast<CodeGeneratorX86*>(codegen);
180    __ Bind(GetEntryLabel());
181    codegen->SaveLiveRegisters(instruction_->GetLocations());
182    __ fs()->call(Address::Absolute(QUICK_ENTRYPOINT_OFFSET(kX86WordSize, pTestSuspend)));
183    codegen->RecordPcInfo(instruction_, instruction_->GetDexPc());
184    codegen->RestoreLiveRegisters(instruction_->GetLocations());
185    if (successor_ == nullptr) {
186      __ jmp(GetReturnLabel());
187    } else {
188      __ jmp(x86_codegen->GetLabelOf(successor_));
189    }
190  }
191
192  Label* GetReturnLabel() {
193    DCHECK(successor_ == nullptr);
194    return &return_label_;
195  }
196
197 private:
198  HSuspendCheck* const instruction_;
199  HBasicBlock* const successor_;
200  Label return_label_;
201
202  DISALLOW_COPY_AND_ASSIGN(SuspendCheckSlowPathX86);
203};
204
205class LoadStringSlowPathX86 : public SlowPathCodeX86 {
206 public:
207  explicit LoadStringSlowPathX86(HLoadString* instruction) : instruction_(instruction) {}
208
209  virtual void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
210    LocationSummary* locations = instruction_->GetLocations();
211    DCHECK(!locations->GetLiveRegisters()->ContainsCoreRegister(locations->Out().reg()));
212
213    CodeGeneratorX86* x86_codegen = down_cast<CodeGeneratorX86*>(codegen);
214    __ Bind(GetEntryLabel());
215    codegen->SaveLiveRegisters(locations);
216
217    InvokeRuntimeCallingConvention calling_convention;
218    x86_codegen->LoadCurrentMethod(calling_convention.GetRegisterAt(1));
219    __ movl(calling_convention.GetRegisterAt(0), Immediate(instruction_->GetStringIndex()));
220    __ fs()->call(Address::Absolute(QUICK_ENTRYPOINT_OFFSET(kX86WordSize, pResolveString)));
221    codegen->RecordPcInfo(instruction_, instruction_->GetDexPc());
222    x86_codegen->Move32(locations->Out(), Location::RegisterLocation(EAX));
223    codegen->RestoreLiveRegisters(locations);
224
225    __ jmp(GetExitLabel());
226  }
227
228 private:
229  HLoadString* const instruction_;
230
231  DISALLOW_COPY_AND_ASSIGN(LoadStringSlowPathX86);
232};
233
234class LoadClassSlowPathX86 : public SlowPathCodeX86 {
235 public:
236  LoadClassSlowPathX86(HLoadClass* cls,
237                       HInstruction* at,
238                       uint32_t dex_pc,
239                       bool do_clinit)
240      : cls_(cls), at_(at), dex_pc_(dex_pc), do_clinit_(do_clinit) {
241    DCHECK(at->IsLoadClass() || at->IsClinitCheck());
242  }
243
244  virtual void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
245    LocationSummary* locations = at_->GetLocations();
246    CodeGeneratorX86* x86_codegen = down_cast<CodeGeneratorX86*>(codegen);
247    __ Bind(GetEntryLabel());
248    codegen->SaveLiveRegisters(locations);
249
250    InvokeRuntimeCallingConvention calling_convention;
251    __ movl(calling_convention.GetRegisterAt(0), Immediate(cls_->GetTypeIndex()));
252    x86_codegen->LoadCurrentMethod(calling_convention.GetRegisterAt(1));
253    __ fs()->call(Address::Absolute(do_clinit_
254        ? QUICK_ENTRYPOINT_OFFSET(kX86WordSize, pInitializeStaticStorage)
255        : QUICK_ENTRYPOINT_OFFSET(kX86WordSize, pInitializeType)));
256    codegen->RecordPcInfo(at_, dex_pc_);
257
258    // Move the class to the desired location.
259    Location out = locations->Out();
260    if (out.IsValid()) {
261      DCHECK(out.IsRegister() && !locations->GetLiveRegisters()->ContainsCoreRegister(out.reg()));
262      x86_codegen->Move32(out, Location::RegisterLocation(EAX));
263    }
264
265    codegen->RestoreLiveRegisters(locations);
266    __ jmp(GetExitLabel());
267  }
268
269 private:
270  // The class this slow path will load.
271  HLoadClass* const cls_;
272
273  // The instruction where this slow path is happening.
274  // (Might be the load class or an initialization check).
275  HInstruction* const at_;
276
277  // The dex PC of `at_`.
278  const uint32_t dex_pc_;
279
280  // Whether to initialize the class.
281  const bool do_clinit_;
282
283  DISALLOW_COPY_AND_ASSIGN(LoadClassSlowPathX86);
284};
285
286class TypeCheckSlowPathX86 : public SlowPathCodeX86 {
287 public:
288  TypeCheckSlowPathX86(HInstruction* instruction,
289                       Location class_to_check,
290                       Location object_class,
291                       uint32_t dex_pc)
292      : instruction_(instruction),
293        class_to_check_(class_to_check),
294        object_class_(object_class),
295        dex_pc_(dex_pc) {}
296
297  virtual void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
298    LocationSummary* locations = instruction_->GetLocations();
299    DCHECK(instruction_->IsCheckCast()
300           || !locations->GetLiveRegisters()->ContainsCoreRegister(locations->Out().reg()));
301
302    CodeGeneratorX86* x86_codegen = down_cast<CodeGeneratorX86*>(codegen);
303    __ Bind(GetEntryLabel());
304    codegen->SaveLiveRegisters(locations);
305
306    // We're moving two locations to locations that could overlap, so we need a parallel
307    // move resolver.
308    InvokeRuntimeCallingConvention calling_convention;
309    x86_codegen->EmitParallelMoves(
310        class_to_check_,
311        Location::RegisterLocation(calling_convention.GetRegisterAt(0)),
312        object_class_,
313        Location::RegisterLocation(calling_convention.GetRegisterAt(1)));
314
315    if (instruction_->IsInstanceOf()) {
316      __ fs()->call(Address::Absolute(QUICK_ENTRYPOINT_OFFSET(kX86WordSize,
317                                                              pInstanceofNonTrivial)));
318    } else {
319      DCHECK(instruction_->IsCheckCast());
320      __ fs()->call(Address::Absolute(QUICK_ENTRYPOINT_OFFSET(kX86WordSize, pCheckCast)));
321    }
322
323    codegen->RecordPcInfo(instruction_, dex_pc_);
324    if (instruction_->IsInstanceOf()) {
325      x86_codegen->Move32(locations->Out(), Location::RegisterLocation(EAX));
326    }
327    codegen->RestoreLiveRegisters(locations);
328
329    __ jmp(GetExitLabel());
330  }
331
332 private:
333  HInstruction* const instruction_;
334  const Location class_to_check_;
335  const Location object_class_;
336  const uint32_t dex_pc_;
337
338  DISALLOW_COPY_AND_ASSIGN(TypeCheckSlowPathX86);
339};
340
341#undef __
342#define __ reinterpret_cast<X86Assembler*>(GetAssembler())->
343
344inline Condition X86Condition(IfCondition cond) {
345  switch (cond) {
346    case kCondEQ: return kEqual;
347    case kCondNE: return kNotEqual;
348    case kCondLT: return kLess;
349    case kCondLE: return kLessEqual;
350    case kCondGT: return kGreater;
351    case kCondGE: return kGreaterEqual;
352    default:
353      LOG(FATAL) << "Unknown if condition";
354  }
355  return kEqual;
356}
357
358void CodeGeneratorX86::DumpCoreRegister(std::ostream& stream, int reg) const {
359  stream << X86ManagedRegister::FromCpuRegister(Register(reg));
360}
361
362void CodeGeneratorX86::DumpFloatingPointRegister(std::ostream& stream, int reg) const {
363  stream << X86ManagedRegister::FromXmmRegister(XmmRegister(reg));
364}
365
366size_t CodeGeneratorX86::SaveCoreRegister(size_t stack_index, uint32_t reg_id) {
367  __ movl(Address(ESP, stack_index), static_cast<Register>(reg_id));
368  return kX86WordSize;
369}
370
371size_t CodeGeneratorX86::RestoreCoreRegister(size_t stack_index, uint32_t reg_id) {
372  __ movl(static_cast<Register>(reg_id), Address(ESP, stack_index));
373  return kX86WordSize;
374}
375
376CodeGeneratorX86::CodeGeneratorX86(HGraph* graph, const CompilerOptions& compiler_options)
377    : CodeGenerator(graph, kNumberOfCpuRegisters, kNumberOfXmmRegisters,
378                    kNumberOfRegisterPairs, 0, 0, compiler_options),
379      block_labels_(graph->GetArena(), 0),
380      location_builder_(graph, this),
381      instruction_visitor_(graph, this),
382      move_resolver_(graph->GetArena(), this) {}
383
384size_t CodeGeneratorX86::FrameEntrySpillSize() const {
385  return kNumberOfPushedRegistersAtEntry * kX86WordSize;
386}
387
388Location CodeGeneratorX86::AllocateFreeRegister(Primitive::Type type) const {
389  switch (type) {
390    case Primitive::kPrimLong: {
391      size_t reg = FindFreeEntry(blocked_register_pairs_, kNumberOfRegisterPairs);
392      X86ManagedRegister pair =
393          X86ManagedRegister::FromRegisterPair(static_cast<RegisterPair>(reg));
394      DCHECK(!blocked_core_registers_[pair.AsRegisterPairLow()]);
395      DCHECK(!blocked_core_registers_[pair.AsRegisterPairHigh()]);
396      blocked_core_registers_[pair.AsRegisterPairLow()] = true;
397      blocked_core_registers_[pair.AsRegisterPairHigh()] = true;
398      UpdateBlockedPairRegisters();
399      return Location::RegisterPairLocation(pair.AsRegisterPairLow(), pair.AsRegisterPairHigh());
400    }
401
402    case Primitive::kPrimByte:
403    case Primitive::kPrimBoolean:
404    case Primitive::kPrimChar:
405    case Primitive::kPrimShort:
406    case Primitive::kPrimInt:
407    case Primitive::kPrimNot: {
408      Register reg = static_cast<Register>(
409          FindFreeEntry(blocked_core_registers_, kNumberOfCpuRegisters));
410      // Block all register pairs that contain `reg`.
411      for (int i = 0; i < kNumberOfRegisterPairs; i++) {
412        X86ManagedRegister current =
413            X86ManagedRegister::FromRegisterPair(static_cast<RegisterPair>(i));
414        if (current.AsRegisterPairLow() == reg || current.AsRegisterPairHigh() == reg) {
415          blocked_register_pairs_[i] = true;
416        }
417      }
418      return Location::RegisterLocation(reg);
419    }
420
421    case Primitive::kPrimFloat:
422    case Primitive::kPrimDouble: {
423      return Location::FpuRegisterLocation(
424          FindFreeEntry(blocked_fpu_registers_, kNumberOfXmmRegisters));
425    }
426
427    case Primitive::kPrimVoid:
428      LOG(FATAL) << "Unreachable type " << type;
429  }
430
431  return Location();
432}
433
434void CodeGeneratorX86::SetupBlockedRegisters(bool is_baseline ATTRIBUTE_UNUSED) const {
435  // Don't allocate the dalvik style register pair passing.
436  blocked_register_pairs_[ECX_EDX] = true;
437
438  // Stack register is always reserved.
439  blocked_core_registers_[ESP] = true;
440
441  // TODO: We currently don't use Quick's callee saved registers.
442  DCHECK(kFollowsQuickABI);
443  blocked_core_registers_[EBP] = true;
444  blocked_core_registers_[ESI] = true;
445  blocked_core_registers_[EDI] = true;
446
447  UpdateBlockedPairRegisters();
448}
449
450void CodeGeneratorX86::UpdateBlockedPairRegisters() const {
451  for (int i = 0; i < kNumberOfRegisterPairs; i++) {
452    X86ManagedRegister current =
453        X86ManagedRegister::FromRegisterPair(static_cast<RegisterPair>(i));
454    if (blocked_core_registers_[current.AsRegisterPairLow()]
455        || blocked_core_registers_[current.AsRegisterPairHigh()]) {
456      blocked_register_pairs_[i] = true;
457    }
458  }
459}
460
461InstructionCodeGeneratorX86::InstructionCodeGeneratorX86(HGraph* graph, CodeGeneratorX86* codegen)
462      : HGraphVisitor(graph),
463        assembler_(codegen->GetAssembler()),
464        codegen_(codegen) {}
465
466void CodeGeneratorX86::GenerateFrameEntry() {
467  // Create a fake register to mimic Quick.
468  static const int kFakeReturnRegister = 8;
469  core_spill_mask_ |= (1 << kFakeReturnRegister);
470
471  bool skip_overflow_check =
472      IsLeafMethod() && !FrameNeedsStackCheck(GetFrameSize(), InstructionSet::kX86);
473  bool implicitStackOverflowChecks = GetCompilerOptions().GetImplicitStackOverflowChecks();
474
475  if (!skip_overflow_check && implicitStackOverflowChecks) {
476    __ testl(EAX, Address(ESP, -static_cast<int32_t>(GetStackOverflowReservedBytes(kX86))));
477    RecordPcInfo(nullptr, 0);
478  }
479
480  // The return PC has already been pushed on the stack.
481  __ subl(ESP, Immediate(GetFrameSize() - kNumberOfPushedRegistersAtEntry * kX86WordSize));
482
483  if (!skip_overflow_check && !implicitStackOverflowChecks) {
484    SlowPathCodeX86* slow_path = new (GetGraph()->GetArena()) StackOverflowCheckSlowPathX86();
485    AddSlowPath(slow_path);
486
487    __ fs()->cmpl(ESP, Address::Absolute(Thread::StackEndOffset<kX86WordSize>()));
488    __ j(kLess, slow_path->GetEntryLabel());
489  }
490
491  __ movl(Address(ESP, kCurrentMethodStackOffset), EAX);
492}
493
494void CodeGeneratorX86::GenerateFrameExit() {
495  __ addl(ESP, Immediate(GetFrameSize() - kNumberOfPushedRegistersAtEntry * kX86WordSize));
496}
497
498void CodeGeneratorX86::Bind(HBasicBlock* block) {
499  __ Bind(GetLabelOf(block));
500}
501
502void CodeGeneratorX86::LoadCurrentMethod(Register reg) {
503  __ movl(reg, Address(ESP, kCurrentMethodStackOffset));
504}
505
506Location CodeGeneratorX86::GetStackLocation(HLoadLocal* load) const {
507  switch (load->GetType()) {
508    case Primitive::kPrimLong:
509    case Primitive::kPrimDouble:
510      return Location::DoubleStackSlot(GetStackSlot(load->GetLocal()));
511      break;
512
513    case Primitive::kPrimInt:
514    case Primitive::kPrimNot:
515    case Primitive::kPrimFloat:
516      return Location::StackSlot(GetStackSlot(load->GetLocal()));
517
518    case Primitive::kPrimBoolean:
519    case Primitive::kPrimByte:
520    case Primitive::kPrimChar:
521    case Primitive::kPrimShort:
522    case Primitive::kPrimVoid:
523      LOG(FATAL) << "Unexpected type " << load->GetType();
524  }
525
526  LOG(FATAL) << "Unreachable";
527  return Location();
528}
529
530Location InvokeDexCallingConventionVisitor::GetNextLocation(Primitive::Type type) {
531  switch (type) {
532    case Primitive::kPrimBoolean:
533    case Primitive::kPrimByte:
534    case Primitive::kPrimChar:
535    case Primitive::kPrimShort:
536    case Primitive::kPrimInt:
537    case Primitive::kPrimFloat:
538    case Primitive::kPrimNot: {
539      uint32_t index = gp_index_++;
540      if (index < calling_convention.GetNumberOfRegisters()) {
541        return Location::RegisterLocation(calling_convention.GetRegisterAt(index));
542      } else {
543        return Location::StackSlot(calling_convention.GetStackOffsetOf(index));
544      }
545    }
546
547    case Primitive::kPrimLong:
548    case Primitive::kPrimDouble: {
549      uint32_t index = gp_index_;
550      gp_index_ += 2;
551      if (index + 1 < calling_convention.GetNumberOfRegisters()) {
552        X86ManagedRegister pair = X86ManagedRegister::FromRegisterPair(
553            calling_convention.GetRegisterPairAt(index));
554        return Location::RegisterPairLocation(pair.AsRegisterPairLow(), pair.AsRegisterPairHigh());
555      } else if (index + 1 == calling_convention.GetNumberOfRegisters()) {
556        // On X86, the register index and stack index of a quick parameter is the same, since
557        // we are passing floating pointer values in core registers.
558        return Location::QuickParameter(index, index);
559      } else {
560        return Location::DoubleStackSlot(calling_convention.GetStackOffsetOf(index));
561      }
562    }
563
564    case Primitive::kPrimVoid:
565      LOG(FATAL) << "Unexpected parameter type " << type;
566      break;
567  }
568  return Location();
569}
570
571void CodeGeneratorX86::Move32(Location destination, Location source) {
572  if (source.Equals(destination)) {
573    return;
574  }
575  if (destination.IsRegister()) {
576    if (source.IsRegister()) {
577      __ movl(destination.AsRegister<Register>(), source.AsRegister<Register>());
578    } else if (source.IsFpuRegister()) {
579      __ movd(destination.AsRegister<Register>(), source.AsFpuRegister<XmmRegister>());
580    } else {
581      DCHECK(source.IsStackSlot());
582      __ movl(destination.AsRegister<Register>(), Address(ESP, source.GetStackIndex()));
583    }
584  } else if (destination.IsFpuRegister()) {
585    if (source.IsRegister()) {
586      __ movd(destination.AsFpuRegister<XmmRegister>(), source.AsRegister<Register>());
587    } else if (source.IsFpuRegister()) {
588      __ movaps(destination.AsFpuRegister<XmmRegister>(), source.AsFpuRegister<XmmRegister>());
589    } else {
590      DCHECK(source.IsStackSlot());
591      __ movss(destination.AsFpuRegister<XmmRegister>(), Address(ESP, source.GetStackIndex()));
592    }
593  } else {
594    DCHECK(destination.IsStackSlot()) << destination;
595    if (source.IsRegister()) {
596      __ movl(Address(ESP, destination.GetStackIndex()), source.AsRegister<Register>());
597    } else if (source.IsFpuRegister()) {
598      __ movss(Address(ESP, destination.GetStackIndex()), source.AsFpuRegister<XmmRegister>());
599    } else {
600      DCHECK(source.IsStackSlot());
601      __ pushl(Address(ESP, source.GetStackIndex()));
602      __ popl(Address(ESP, destination.GetStackIndex()));
603    }
604  }
605}
606
607void CodeGeneratorX86::Move64(Location destination, Location source) {
608  if (source.Equals(destination)) {
609    return;
610  }
611  if (destination.IsRegisterPair()) {
612    if (source.IsRegisterPair()) {
613      EmitParallelMoves(
614          Location::RegisterLocation(source.AsRegisterPairHigh<Register>()),
615          Location::RegisterLocation(destination.AsRegisterPairHigh<Register>()),
616          Location::RegisterLocation(source.AsRegisterPairLow<Register>()),
617          Location::RegisterLocation(destination.AsRegisterPairLow<Register>()));
618    } else if (source.IsFpuRegister()) {
619      LOG(FATAL) << "Unimplemented";
620    } else if (source.IsQuickParameter()) {
621      uint16_t register_index = source.GetQuickParameterRegisterIndex();
622      uint16_t stack_index = source.GetQuickParameterStackIndex();
623      InvokeDexCallingConvention calling_convention;
624      EmitParallelMoves(
625          Location::RegisterLocation(calling_convention.GetRegisterAt(register_index)),
626          Location::RegisterLocation(destination.AsRegisterPairLow<Register>()),
627          Location::StackSlot(
628              calling_convention.GetStackOffsetOf(stack_index + 1) + GetFrameSize()),
629          Location::RegisterLocation(destination.AsRegisterPairHigh<Register>()));
630    } else {
631      // No conflict possible, so just do the moves.
632      DCHECK(source.IsDoubleStackSlot());
633      __ movl(destination.AsRegisterPairLow<Register>(), Address(ESP, source.GetStackIndex()));
634      __ movl(destination.AsRegisterPairHigh<Register>(),
635              Address(ESP, source.GetHighStackIndex(kX86WordSize)));
636    }
637  } else if (destination.IsQuickParameter()) {
638    InvokeDexCallingConvention calling_convention;
639    uint16_t register_index = destination.GetQuickParameterRegisterIndex();
640    uint16_t stack_index = destination.GetQuickParameterStackIndex();
641    if (source.IsRegisterPair()) {
642      LOG(FATAL) << "Unimplemented";
643    } else if (source.IsFpuRegister()) {
644      LOG(FATAL) << "Unimplemented";
645    } else {
646      DCHECK(source.IsDoubleStackSlot());
647      EmitParallelMoves(
648          Location::StackSlot(source.GetStackIndex()),
649          Location::StackSlot(calling_convention.GetStackOffsetOf(stack_index)),
650          Location::StackSlot(source.GetHighStackIndex(kX86WordSize)),
651          Location::StackSlot(calling_convention.GetStackOffsetOf(stack_index + 1)));
652      __ movl(calling_convention.GetRegisterAt(register_index), Address(ESP, source.GetStackIndex()));
653    }
654  } else if (destination.IsFpuRegister()) {
655    if (source.IsDoubleStackSlot()) {
656      __ movsd(destination.AsFpuRegister<XmmRegister>(), Address(ESP, source.GetStackIndex()));
657    } else {
658      LOG(FATAL) << "Unimplemented";
659    }
660  } else {
661    DCHECK(destination.IsDoubleStackSlot()) << destination;
662    if (source.IsRegisterPair()) {
663      // No conflict possible, so just do the moves.
664      __ movl(Address(ESP, destination.GetStackIndex()), source.AsRegisterPairLow<Register>());
665      __ movl(Address(ESP, destination.GetHighStackIndex(kX86WordSize)),
666              source.AsRegisterPairHigh<Register>());
667    } else if (source.IsQuickParameter()) {
668      // No conflict possible, so just do the move.
669      InvokeDexCallingConvention calling_convention;
670      uint16_t register_index = source.GetQuickParameterRegisterIndex();
671      uint16_t stack_index = source.GetQuickParameterStackIndex();
672      // Just move the low part. The only time a source is a quick parameter is
673      // when moving the parameter to its stack locations. And the (Java) caller
674      // of this method has already done that.
675      __ movl(Address(ESP, destination.GetStackIndex()),
676              calling_convention.GetRegisterAt(register_index));
677      DCHECK_EQ(calling_convention.GetStackOffsetOf(stack_index + 1) + GetFrameSize(),
678                static_cast<size_t>(destination.GetHighStackIndex(kX86WordSize)));
679    } else if (source.IsFpuRegister()) {
680      __ movsd(Address(ESP, destination.GetStackIndex()), source.AsFpuRegister<XmmRegister>());
681    } else {
682      DCHECK(source.IsDoubleStackSlot());
683      EmitParallelMoves(
684          Location::StackSlot(source.GetStackIndex()),
685          Location::StackSlot(destination.GetStackIndex()),
686          Location::StackSlot(source.GetHighStackIndex(kX86WordSize)),
687          Location::StackSlot(destination.GetHighStackIndex(kX86WordSize)));
688    }
689  }
690}
691
692void CodeGeneratorX86::Move(HInstruction* instruction, Location location, HInstruction* move_for) {
693  LocationSummary* locations = instruction->GetLocations();
694  if (locations != nullptr && locations->Out().Equals(location)) {
695    return;
696  }
697
698  if (locations != nullptr && locations->Out().IsConstant()) {
699    HConstant* const_to_move = locations->Out().GetConstant();
700    if (const_to_move->IsIntConstant()) {
701      Immediate imm(const_to_move->AsIntConstant()->GetValue());
702      if (location.IsRegister()) {
703        __ movl(location.AsRegister<Register>(), imm);
704      } else if (location.IsStackSlot()) {
705        __ movl(Address(ESP, location.GetStackIndex()), imm);
706      } else {
707        DCHECK(location.IsConstant());
708        DCHECK_EQ(location.GetConstant(), const_to_move);
709      }
710    } else if (const_to_move->IsLongConstant()) {
711      int64_t value = const_to_move->AsLongConstant()->GetValue();
712      if (location.IsRegisterPair()) {
713        __ movl(location.AsRegisterPairLow<Register>(), Immediate(Low32Bits(value)));
714        __ movl(location.AsRegisterPairHigh<Register>(), Immediate(High32Bits(value)));
715      } else if (location.IsDoubleStackSlot()) {
716        __ movl(Address(ESP, location.GetStackIndex()), Immediate(Low32Bits(value)));
717        __ movl(Address(ESP, location.GetHighStackIndex(kX86WordSize)),
718                Immediate(High32Bits(value)));
719      } else {
720        DCHECK(location.IsConstant());
721        DCHECK_EQ(location.GetConstant(), instruction);
722      }
723    }
724  } else if (instruction->IsTemporary()) {
725    Location temp_location = GetTemporaryLocation(instruction->AsTemporary());
726    if (temp_location.IsStackSlot()) {
727      Move32(location, temp_location);
728    } else {
729      DCHECK(temp_location.IsDoubleStackSlot());
730      Move64(location, temp_location);
731    }
732  } else if (instruction->IsLoadLocal()) {
733    int slot = GetStackSlot(instruction->AsLoadLocal()->GetLocal());
734    switch (instruction->GetType()) {
735      case Primitive::kPrimBoolean:
736      case Primitive::kPrimByte:
737      case Primitive::kPrimChar:
738      case Primitive::kPrimShort:
739      case Primitive::kPrimInt:
740      case Primitive::kPrimNot:
741      case Primitive::kPrimFloat:
742        Move32(location, Location::StackSlot(slot));
743        break;
744
745      case Primitive::kPrimLong:
746      case Primitive::kPrimDouble:
747        Move64(location, Location::DoubleStackSlot(slot));
748        break;
749
750      default:
751        LOG(FATAL) << "Unimplemented local type " << instruction->GetType();
752    }
753  } else {
754    DCHECK((instruction->GetNext() == move_for) || instruction->GetNext()->IsTemporary());
755    switch (instruction->GetType()) {
756      case Primitive::kPrimBoolean:
757      case Primitive::kPrimByte:
758      case Primitive::kPrimChar:
759      case Primitive::kPrimShort:
760      case Primitive::kPrimInt:
761      case Primitive::kPrimNot:
762      case Primitive::kPrimFloat:
763        Move32(location, locations->Out());
764        break;
765
766      case Primitive::kPrimLong:
767      case Primitive::kPrimDouble:
768        Move64(location, locations->Out());
769        break;
770
771      default:
772        LOG(FATAL) << "Unexpected type " << instruction->GetType();
773    }
774  }
775}
776
777void LocationsBuilderX86::VisitGoto(HGoto* got) {
778  got->SetLocations(nullptr);
779}
780
781void InstructionCodeGeneratorX86::VisitGoto(HGoto* got) {
782  HBasicBlock* successor = got->GetSuccessor();
783  DCHECK(!successor->IsExitBlock());
784
785  HBasicBlock* block = got->GetBlock();
786  HInstruction* previous = got->GetPrevious();
787
788  HLoopInformation* info = block->GetLoopInformation();
789  if (info != nullptr && info->IsBackEdge(block) && info->HasSuspendCheck()) {
790    codegen_->ClearSpillSlotsFromLoopPhisInStackMap(info->GetSuspendCheck());
791    GenerateSuspendCheck(info->GetSuspendCheck(), successor);
792    return;
793  }
794
795  if (block->IsEntryBlock() && (previous != nullptr) && previous->IsSuspendCheck()) {
796    GenerateSuspendCheck(previous->AsSuspendCheck(), nullptr);
797  }
798  if (!codegen_->GoesToNextBlock(got->GetBlock(), successor)) {
799    __ jmp(codegen_->GetLabelOf(successor));
800  }
801}
802
803void LocationsBuilderX86::VisitExit(HExit* exit) {
804  exit->SetLocations(nullptr);
805}
806
807void InstructionCodeGeneratorX86::VisitExit(HExit* exit) {
808  UNUSED(exit);
809  if (kIsDebugBuild) {
810    __ Comment("Unreachable");
811    __ int3();
812  }
813}
814
815void LocationsBuilderX86::VisitIf(HIf* if_instr) {
816  LocationSummary* locations =
817      new (GetGraph()->GetArena()) LocationSummary(if_instr, LocationSummary::kNoCall);
818  HInstruction* cond = if_instr->InputAt(0);
819  if (!cond->IsCondition() || cond->AsCondition()->NeedsMaterialization()) {
820    locations->SetInAt(0, Location::Any());
821  }
822}
823
824void InstructionCodeGeneratorX86::VisitIf(HIf* if_instr) {
825  HInstruction* cond = if_instr->InputAt(0);
826  if (cond->IsIntConstant()) {
827    // Constant condition, statically compared against 1.
828    int32_t cond_value = cond->AsIntConstant()->GetValue();
829    if (cond_value == 1) {
830      if (!codegen_->GoesToNextBlock(if_instr->GetBlock(),
831                                     if_instr->IfTrueSuccessor())) {
832        __ jmp(codegen_->GetLabelOf(if_instr->IfTrueSuccessor()));
833      }
834      return;
835    } else {
836      DCHECK_EQ(cond_value, 0);
837    }
838  } else {
839    bool materialized =
840        !cond->IsCondition() || cond->AsCondition()->NeedsMaterialization();
841    // Moves do not affect the eflags register, so if the condition is
842    // evaluated just before the if, we don't need to evaluate it
843    // again.
844    bool eflags_set = cond->IsCondition()
845        && cond->AsCondition()->IsBeforeWhenDisregardMoves(if_instr);
846    if (materialized) {
847      if (!eflags_set) {
848        // Materialized condition, compare against 0.
849        Location lhs = if_instr->GetLocations()->InAt(0);
850        if (lhs.IsRegister()) {
851          __ cmpl(lhs.AsRegister<Register>(), Immediate(0));
852        } else {
853          __ cmpl(Address(ESP, lhs.GetStackIndex()), Immediate(0));
854        }
855        __ j(kNotEqual,  codegen_->GetLabelOf(if_instr->IfTrueSuccessor()));
856      } else {
857        __ j(X86Condition(cond->AsCondition()->GetCondition()),
858             codegen_->GetLabelOf(if_instr->IfTrueSuccessor()));
859      }
860    } else {
861      Location lhs = cond->GetLocations()->InAt(0);
862      Location rhs = cond->GetLocations()->InAt(1);
863      // LHS is guaranteed to be in a register (see
864      // LocationsBuilderX86::VisitCondition).
865      if (rhs.IsRegister()) {
866        __ cmpl(lhs.AsRegister<Register>(), rhs.AsRegister<Register>());
867      } else if (rhs.IsConstant()) {
868        HIntConstant* instruction = rhs.GetConstant()->AsIntConstant();
869        Immediate imm(instruction->AsIntConstant()->GetValue());
870        __ cmpl(lhs.AsRegister<Register>(), imm);
871      } else {
872        __ cmpl(lhs.AsRegister<Register>(), Address(ESP, rhs.GetStackIndex()));
873      }
874      __ j(X86Condition(cond->AsCondition()->GetCondition()),
875           codegen_->GetLabelOf(if_instr->IfTrueSuccessor()));
876    }
877  }
878  if (!codegen_->GoesToNextBlock(if_instr->GetBlock(),
879                                 if_instr->IfFalseSuccessor())) {
880    __ jmp(codegen_->GetLabelOf(if_instr->IfFalseSuccessor()));
881  }
882}
883
884void LocationsBuilderX86::VisitLocal(HLocal* local) {
885  local->SetLocations(nullptr);
886}
887
888void InstructionCodeGeneratorX86::VisitLocal(HLocal* local) {
889  DCHECK_EQ(local->GetBlock(), GetGraph()->GetEntryBlock());
890}
891
892void LocationsBuilderX86::VisitLoadLocal(HLoadLocal* local) {
893  local->SetLocations(nullptr);
894}
895
896void InstructionCodeGeneratorX86::VisitLoadLocal(HLoadLocal* load) {
897  // Nothing to do, this is driven by the code generator.
898  UNUSED(load);
899}
900
901void LocationsBuilderX86::VisitStoreLocal(HStoreLocal* store) {
902  LocationSummary* locations =
903      new (GetGraph()->GetArena()) LocationSummary(store, LocationSummary::kNoCall);
904  switch (store->InputAt(1)->GetType()) {
905    case Primitive::kPrimBoolean:
906    case Primitive::kPrimByte:
907    case Primitive::kPrimChar:
908    case Primitive::kPrimShort:
909    case Primitive::kPrimInt:
910    case Primitive::kPrimNot:
911    case Primitive::kPrimFloat:
912      locations->SetInAt(1, Location::StackSlot(codegen_->GetStackSlot(store->GetLocal())));
913      break;
914
915    case Primitive::kPrimLong:
916    case Primitive::kPrimDouble:
917      locations->SetInAt(1, Location::DoubleStackSlot(codegen_->GetStackSlot(store->GetLocal())));
918      break;
919
920    default:
921      LOG(FATAL) << "Unknown local type " << store->InputAt(1)->GetType();
922  }
923  store->SetLocations(locations);
924}
925
926void InstructionCodeGeneratorX86::VisitStoreLocal(HStoreLocal* store) {
927  UNUSED(store);
928}
929
930void LocationsBuilderX86::VisitCondition(HCondition* comp) {
931  LocationSummary* locations =
932      new (GetGraph()->GetArena()) LocationSummary(comp, LocationSummary::kNoCall);
933  locations->SetInAt(0, Location::RequiresRegister());
934  locations->SetInAt(1, Location::Any());
935  if (comp->NeedsMaterialization()) {
936    locations->SetOut(Location::RequiresRegister());
937  }
938}
939
940void InstructionCodeGeneratorX86::VisitCondition(HCondition* comp) {
941  if (comp->NeedsMaterialization()) {
942    LocationSummary* locations = comp->GetLocations();
943    Register reg = locations->Out().AsRegister<Register>();
944    // Clear register: setcc only sets the low byte.
945    __ xorl(reg, reg);
946    if (locations->InAt(1).IsRegister()) {
947      __ cmpl(locations->InAt(0).AsRegister<Register>(),
948              locations->InAt(1).AsRegister<Register>());
949    } else if (locations->InAt(1).IsConstant()) {
950      HConstant* instruction = locations->InAt(1).GetConstant();
951      Immediate imm(instruction->AsIntConstant()->GetValue());
952      __ cmpl(locations->InAt(0).AsRegister<Register>(), imm);
953    } else {
954      __ cmpl(locations->InAt(0).AsRegister<Register>(),
955              Address(ESP, locations->InAt(1).GetStackIndex()));
956    }
957    __ setb(X86Condition(comp->GetCondition()), reg);
958  }
959}
960
961void LocationsBuilderX86::VisitEqual(HEqual* comp) {
962  VisitCondition(comp);
963}
964
965void InstructionCodeGeneratorX86::VisitEqual(HEqual* comp) {
966  VisitCondition(comp);
967}
968
969void LocationsBuilderX86::VisitNotEqual(HNotEqual* comp) {
970  VisitCondition(comp);
971}
972
973void InstructionCodeGeneratorX86::VisitNotEqual(HNotEqual* comp) {
974  VisitCondition(comp);
975}
976
977void LocationsBuilderX86::VisitLessThan(HLessThan* comp) {
978  VisitCondition(comp);
979}
980
981void InstructionCodeGeneratorX86::VisitLessThan(HLessThan* comp) {
982  VisitCondition(comp);
983}
984
985void LocationsBuilderX86::VisitLessThanOrEqual(HLessThanOrEqual* comp) {
986  VisitCondition(comp);
987}
988
989void InstructionCodeGeneratorX86::VisitLessThanOrEqual(HLessThanOrEqual* comp) {
990  VisitCondition(comp);
991}
992
993void LocationsBuilderX86::VisitGreaterThan(HGreaterThan* comp) {
994  VisitCondition(comp);
995}
996
997void InstructionCodeGeneratorX86::VisitGreaterThan(HGreaterThan* comp) {
998  VisitCondition(comp);
999}
1000
1001void LocationsBuilderX86::VisitGreaterThanOrEqual(HGreaterThanOrEqual* comp) {
1002  VisitCondition(comp);
1003}
1004
1005void InstructionCodeGeneratorX86::VisitGreaterThanOrEqual(HGreaterThanOrEqual* comp) {
1006  VisitCondition(comp);
1007}
1008
1009void LocationsBuilderX86::VisitIntConstant(HIntConstant* constant) {
1010  LocationSummary* locations =
1011      new (GetGraph()->GetArena()) LocationSummary(constant, LocationSummary::kNoCall);
1012  locations->SetOut(Location::ConstantLocation(constant));
1013}
1014
1015void InstructionCodeGeneratorX86::VisitIntConstant(HIntConstant* constant) {
1016  // Will be generated at use site.
1017  UNUSED(constant);
1018}
1019
1020void LocationsBuilderX86::VisitLongConstant(HLongConstant* constant) {
1021  LocationSummary* locations =
1022      new (GetGraph()->GetArena()) LocationSummary(constant, LocationSummary::kNoCall);
1023  locations->SetOut(Location::ConstantLocation(constant));
1024}
1025
1026void InstructionCodeGeneratorX86::VisitLongConstant(HLongConstant* constant) {
1027  // Will be generated at use site.
1028  UNUSED(constant);
1029}
1030
1031void LocationsBuilderX86::VisitFloatConstant(HFloatConstant* constant) {
1032  LocationSummary* locations =
1033      new (GetGraph()->GetArena()) LocationSummary(constant, LocationSummary::kNoCall);
1034  locations->SetOut(Location::ConstantLocation(constant));
1035}
1036
1037void InstructionCodeGeneratorX86::VisitFloatConstant(HFloatConstant* constant) {
1038  // Will be generated at use site.
1039  UNUSED(constant);
1040}
1041
1042void LocationsBuilderX86::VisitDoubleConstant(HDoubleConstant* constant) {
1043  LocationSummary* locations =
1044      new (GetGraph()->GetArena()) LocationSummary(constant, LocationSummary::kNoCall);
1045  locations->SetOut(Location::ConstantLocation(constant));
1046}
1047
1048void InstructionCodeGeneratorX86::VisitDoubleConstant(HDoubleConstant* constant) {
1049  // Will be generated at use site.
1050  UNUSED(constant);
1051}
1052
1053void LocationsBuilderX86::VisitReturnVoid(HReturnVoid* ret) {
1054  ret->SetLocations(nullptr);
1055}
1056
1057void InstructionCodeGeneratorX86::VisitReturnVoid(HReturnVoid* ret) {
1058  UNUSED(ret);
1059  codegen_->GenerateFrameExit();
1060  __ ret();
1061}
1062
1063void LocationsBuilderX86::VisitReturn(HReturn* ret) {
1064  LocationSummary* locations =
1065      new (GetGraph()->GetArena()) LocationSummary(ret, LocationSummary::kNoCall);
1066  switch (ret->InputAt(0)->GetType()) {
1067    case Primitive::kPrimBoolean:
1068    case Primitive::kPrimByte:
1069    case Primitive::kPrimChar:
1070    case Primitive::kPrimShort:
1071    case Primitive::kPrimInt:
1072    case Primitive::kPrimNot:
1073      locations->SetInAt(0, Location::RegisterLocation(EAX));
1074      break;
1075
1076    case Primitive::kPrimLong:
1077      locations->SetInAt(
1078          0, Location::RegisterPairLocation(EAX, EDX));
1079      break;
1080
1081    case Primitive::kPrimFloat:
1082    case Primitive::kPrimDouble:
1083      locations->SetInAt(
1084          0, Location::FpuRegisterLocation(XMM0));
1085      break;
1086
1087    default:
1088      LOG(FATAL) << "Unknown return type " << ret->InputAt(0)->GetType();
1089  }
1090}
1091
1092void InstructionCodeGeneratorX86::VisitReturn(HReturn* ret) {
1093  if (kIsDebugBuild) {
1094    switch (ret->InputAt(0)->GetType()) {
1095      case Primitive::kPrimBoolean:
1096      case Primitive::kPrimByte:
1097      case Primitive::kPrimChar:
1098      case Primitive::kPrimShort:
1099      case Primitive::kPrimInt:
1100      case Primitive::kPrimNot:
1101        DCHECK_EQ(ret->GetLocations()->InAt(0).AsRegister<Register>(), EAX);
1102        break;
1103
1104      case Primitive::kPrimLong:
1105        DCHECK_EQ(ret->GetLocations()->InAt(0).AsRegisterPairLow<Register>(), EAX);
1106        DCHECK_EQ(ret->GetLocations()->InAt(0).AsRegisterPairHigh<Register>(), EDX);
1107        break;
1108
1109      case Primitive::kPrimFloat:
1110      case Primitive::kPrimDouble:
1111        DCHECK_EQ(ret->GetLocations()->InAt(0).AsFpuRegister<XmmRegister>(), XMM0);
1112        break;
1113
1114      default:
1115        LOG(FATAL) << "Unknown return type " << ret->InputAt(0)->GetType();
1116    }
1117  }
1118  codegen_->GenerateFrameExit();
1119  __ ret();
1120}
1121
1122void LocationsBuilderX86::VisitInvokeStaticOrDirect(HInvokeStaticOrDirect* invoke) {
1123  HandleInvoke(invoke);
1124}
1125
1126void InstructionCodeGeneratorX86::VisitInvokeStaticOrDirect(HInvokeStaticOrDirect* invoke) {
1127  Register temp = invoke->GetLocations()->GetTemp(0).AsRegister<Register>();
1128
1129  // TODO: Implement all kinds of calls:
1130  // 1) boot -> boot
1131  // 2) app -> boot
1132  // 3) app -> app
1133  //
1134  // Currently we implement the app -> app logic, which looks up in the resolve cache.
1135
1136  // temp = method;
1137  codegen_->LoadCurrentMethod(temp);
1138  // temp = temp->dex_cache_resolved_methods_;
1139  __ movl(temp, Address(temp, mirror::ArtMethod::DexCacheResolvedMethodsOffset().Int32Value()));
1140  // temp = temp[index_in_cache]
1141  __ movl(temp, Address(temp, CodeGenerator::GetCacheOffset(invoke->GetDexMethodIndex())));
1142  // (temp + offset_of_quick_compiled_code)()
1143  __ call(Address(
1144      temp, mirror::ArtMethod::EntryPointFromQuickCompiledCodeOffset(kX86WordSize).Int32Value()));
1145
1146  DCHECK(!codegen_->IsLeafMethod());
1147  codegen_->RecordPcInfo(invoke, invoke->GetDexPc());
1148}
1149
1150void LocationsBuilderX86::VisitInvokeVirtual(HInvokeVirtual* invoke) {
1151  HandleInvoke(invoke);
1152}
1153
1154void LocationsBuilderX86::HandleInvoke(HInvoke* invoke) {
1155  LocationSummary* locations =
1156      new (GetGraph()->GetArena()) LocationSummary(invoke, LocationSummary::kCall);
1157  locations->AddTemp(Location::RegisterLocation(EAX));
1158
1159  InvokeDexCallingConventionVisitor calling_convention_visitor;
1160  for (size_t i = 0; i < invoke->InputCount(); i++) {
1161    HInstruction* input = invoke->InputAt(i);
1162    locations->SetInAt(i, calling_convention_visitor.GetNextLocation(input->GetType()));
1163  }
1164
1165  switch (invoke->GetType()) {
1166    case Primitive::kPrimBoolean:
1167    case Primitive::kPrimByte:
1168    case Primitive::kPrimChar:
1169    case Primitive::kPrimShort:
1170    case Primitive::kPrimInt:
1171    case Primitive::kPrimNot:
1172      locations->SetOut(Location::RegisterLocation(EAX));
1173      break;
1174
1175    case Primitive::kPrimLong:
1176      locations->SetOut(Location::RegisterPairLocation(EAX, EDX));
1177      break;
1178
1179    case Primitive::kPrimVoid:
1180      break;
1181
1182    case Primitive::kPrimDouble:
1183    case Primitive::kPrimFloat:
1184      locations->SetOut(Location::FpuRegisterLocation(XMM0));
1185      break;
1186  }
1187
1188  invoke->SetLocations(locations);
1189}
1190
1191void InstructionCodeGeneratorX86::VisitInvokeVirtual(HInvokeVirtual* invoke) {
1192  Register temp = invoke->GetLocations()->GetTemp(0).AsRegister<Register>();
1193  uint32_t method_offset = mirror::Class::EmbeddedVTableOffset().Uint32Value() +
1194          invoke->GetVTableIndex() * sizeof(mirror::Class::VTableEntry);
1195  LocationSummary* locations = invoke->GetLocations();
1196  Location receiver = locations->InAt(0);
1197  uint32_t class_offset = mirror::Object::ClassOffset().Int32Value();
1198  // temp = object->GetClass();
1199  if (receiver.IsStackSlot()) {
1200    __ movl(temp, Address(ESP, receiver.GetStackIndex()));
1201    __ movl(temp, Address(temp, class_offset));
1202  } else {
1203    __ movl(temp, Address(receiver.AsRegister<Register>(), class_offset));
1204  }
1205  codegen_->MaybeRecordImplicitNullCheck(invoke);
1206  // temp = temp->GetMethodAt(method_offset);
1207  __ movl(temp, Address(temp, method_offset));
1208  // call temp->GetEntryPoint();
1209  __ call(Address(
1210      temp, mirror::ArtMethod::EntryPointFromQuickCompiledCodeOffset(kX86WordSize).Int32Value()));
1211
1212  DCHECK(!codegen_->IsLeafMethod());
1213  codegen_->RecordPcInfo(invoke, invoke->GetDexPc());
1214}
1215
1216void LocationsBuilderX86::VisitInvokeInterface(HInvokeInterface* invoke) {
1217  HandleInvoke(invoke);
1218  // Add the hidden argument.
1219  invoke->GetLocations()->AddTemp(Location::FpuRegisterLocation(XMM0));
1220}
1221
1222void InstructionCodeGeneratorX86::VisitInvokeInterface(HInvokeInterface* invoke) {
1223  // TODO: b/18116999, our IMTs can miss an IncompatibleClassChangeError.
1224  Register temp = invoke->GetLocations()->GetTemp(0).AsRegister<Register>();
1225  uint32_t method_offset = mirror::Class::EmbeddedImTableOffset().Uint32Value() +
1226          (invoke->GetImtIndex() % mirror::Class::kImtSize) * sizeof(mirror::Class::ImTableEntry);
1227  LocationSummary* locations = invoke->GetLocations();
1228  Location receiver = locations->InAt(0);
1229  uint32_t class_offset = mirror::Object::ClassOffset().Int32Value();
1230
1231  // Set the hidden argument.
1232  __ movl(temp, Immediate(invoke->GetDexMethodIndex()));
1233  __ movd(invoke->GetLocations()->GetTemp(1).AsFpuRegister<XmmRegister>(), temp);
1234
1235  // temp = object->GetClass();
1236  if (receiver.IsStackSlot()) {
1237    __ movl(temp, Address(ESP, receiver.GetStackIndex()));
1238    __ movl(temp, Address(temp, class_offset));
1239  } else {
1240    __ movl(temp, Address(receiver.AsRegister<Register>(), class_offset));
1241  }
1242    codegen_->MaybeRecordImplicitNullCheck(invoke);
1243  // temp = temp->GetImtEntryAt(method_offset);
1244  __ movl(temp, Address(temp, method_offset));
1245  // call temp->GetEntryPoint();
1246  __ call(Address(temp, mirror::ArtMethod::EntryPointFromQuickCompiledCodeOffset(
1247      kX86WordSize).Int32Value()));
1248
1249  DCHECK(!codegen_->IsLeafMethod());
1250  codegen_->RecordPcInfo(invoke, invoke->GetDexPc());
1251}
1252
1253void LocationsBuilderX86::VisitNeg(HNeg* neg) {
1254  LocationSummary* locations =
1255      new (GetGraph()->GetArena()) LocationSummary(neg, LocationSummary::kNoCall);
1256  switch (neg->GetResultType()) {
1257    case Primitive::kPrimInt:
1258    case Primitive::kPrimLong:
1259      locations->SetInAt(0, Location::RequiresRegister());
1260      locations->SetOut(Location::SameAsFirstInput());
1261      break;
1262
1263    case Primitive::kPrimFloat:
1264      locations->SetInAt(0, Location::RequiresFpuRegister());
1265      locations->SetOut(Location::SameAsFirstInput());
1266      locations->AddTemp(Location::RequiresRegister());
1267      locations->AddTemp(Location::RequiresFpuRegister());
1268      break;
1269
1270    case Primitive::kPrimDouble:
1271      locations->SetInAt(0, Location::RequiresFpuRegister());
1272      locations->SetOut(Location::SameAsFirstInput());
1273      locations->AddTemp(Location::RequiresFpuRegister());
1274      break;
1275
1276    default:
1277      LOG(FATAL) << "Unexpected neg type " << neg->GetResultType();
1278  }
1279}
1280
1281void InstructionCodeGeneratorX86::VisitNeg(HNeg* neg) {
1282  LocationSummary* locations = neg->GetLocations();
1283  Location out = locations->Out();
1284  Location in = locations->InAt(0);
1285  switch (neg->GetResultType()) {
1286    case Primitive::kPrimInt:
1287      DCHECK(in.IsRegister());
1288      DCHECK(in.Equals(out));
1289      __ negl(out.AsRegister<Register>());
1290      break;
1291
1292    case Primitive::kPrimLong:
1293      DCHECK(in.IsRegisterPair());
1294      DCHECK(in.Equals(out));
1295      __ negl(out.AsRegisterPairLow<Register>());
1296      // Negation is similar to subtraction from zero.  The least
1297      // significant byte triggers a borrow when it is different from
1298      // zero; to take it into account, add 1 to the most significant
1299      // byte if the carry flag (CF) is set to 1 after the first NEGL
1300      // operation.
1301      __ adcl(out.AsRegisterPairHigh<Register>(), Immediate(0));
1302      __ negl(out.AsRegisterPairHigh<Register>());
1303      break;
1304
1305    case Primitive::kPrimFloat: {
1306      DCHECK(in.Equals(out));
1307      Register constant = locations->GetTemp(0).AsRegister<Register>();
1308      XmmRegister mask = locations->GetTemp(1).AsFpuRegister<XmmRegister>();
1309      // Implement float negation with an exclusive or with value
1310      // 0x80000000 (mask for bit 31, representing the sign of a
1311      // single-precision floating-point number).
1312      __ movl(constant, Immediate(INT32_C(0x80000000)));
1313      __ movd(mask, constant);
1314      __ xorps(out.AsFpuRegister<XmmRegister>(), mask);
1315      break;
1316    }
1317
1318    case Primitive::kPrimDouble: {
1319      DCHECK(in.Equals(out));
1320      XmmRegister mask = locations->GetTemp(0).AsFpuRegister<XmmRegister>();
1321      // Implement double negation with an exclusive or with value
1322      // 0x8000000000000000 (mask for bit 63, representing the sign of
1323      // a double-precision floating-point number).
1324      __ LoadLongConstant(mask, INT64_C(0x8000000000000000));
1325      __ xorpd(out.AsFpuRegister<XmmRegister>(), mask);
1326      break;
1327    }
1328
1329    default:
1330      LOG(FATAL) << "Unexpected neg type " << neg->GetResultType();
1331  }
1332}
1333
1334void LocationsBuilderX86::VisitTypeConversion(HTypeConversion* conversion) {
1335  Primitive::Type result_type = conversion->GetResultType();
1336  Primitive::Type input_type = conversion->GetInputType();
1337  DCHECK_NE(result_type, input_type);
1338
1339  // The float-to-long and double-to-long type conversions rely on a
1340  // call to the runtime.
1341  LocationSummary::CallKind call_kind =
1342      ((input_type == Primitive::kPrimFloat || input_type == Primitive::kPrimDouble)
1343       && result_type == Primitive::kPrimLong)
1344      ? LocationSummary::kCall
1345      : LocationSummary::kNoCall;
1346  LocationSummary* locations =
1347      new (GetGraph()->GetArena()) LocationSummary(conversion, call_kind);
1348
1349  switch (result_type) {
1350    case Primitive::kPrimByte:
1351      switch (input_type) {
1352        case Primitive::kPrimShort:
1353        case Primitive::kPrimInt:
1354        case Primitive::kPrimChar:
1355          // Processing a Dex `int-to-byte' instruction.
1356          locations->SetInAt(0, Location::Any());
1357          locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1358          break;
1359
1360        default:
1361          LOG(FATAL) << "Unexpected type conversion from " << input_type
1362                     << " to " << result_type;
1363      }
1364      break;
1365
1366    case Primitive::kPrimShort:
1367      switch (input_type) {
1368        case Primitive::kPrimByte:
1369        case Primitive::kPrimInt:
1370        case Primitive::kPrimChar:
1371          // Processing a Dex `int-to-short' instruction.
1372          locations->SetInAt(0, Location::Any());
1373          locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1374          break;
1375
1376        default:
1377          LOG(FATAL) << "Unexpected type conversion from " << input_type
1378                     << " to " << result_type;
1379      }
1380      break;
1381
1382    case Primitive::kPrimInt:
1383      switch (input_type) {
1384        case Primitive::kPrimLong:
1385          // Processing a Dex `long-to-int' instruction.
1386          locations->SetInAt(0, Location::Any());
1387          locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1388          break;
1389
1390        case Primitive::kPrimFloat:
1391          // Processing a Dex `float-to-int' instruction.
1392          locations->SetInAt(0, Location::RequiresFpuRegister());
1393          locations->SetOut(Location::RequiresRegister());
1394          locations->AddTemp(Location::RequiresFpuRegister());
1395          break;
1396
1397        case Primitive::kPrimDouble:
1398          // Processing a Dex `double-to-int' instruction.
1399          locations->SetInAt(0, Location::RequiresFpuRegister());
1400          locations->SetOut(Location::RequiresRegister());
1401          locations->AddTemp(Location::RequiresFpuRegister());
1402          break;
1403
1404        default:
1405          LOG(FATAL) << "Unexpected type conversion from " << input_type
1406                     << " to " << result_type;
1407      }
1408      break;
1409
1410    case Primitive::kPrimLong:
1411      switch (input_type) {
1412        case Primitive::kPrimByte:
1413        case Primitive::kPrimShort:
1414        case Primitive::kPrimInt:
1415        case Primitive::kPrimChar:
1416          // Processing a Dex `int-to-long' instruction.
1417          locations->SetInAt(0, Location::RegisterLocation(EAX));
1418          locations->SetOut(Location::RegisterPairLocation(EAX, EDX));
1419          break;
1420
1421        case Primitive::kPrimFloat: {
1422          // Processing a Dex `float-to-long' instruction.
1423          InvokeRuntimeCallingConvention calling_convention;
1424          // Note that on x86 floating-point parameters are passed
1425          // through core registers (here, EAX).
1426          locations->SetInAt(0, Location::RegisterLocation(
1427              calling_convention.GetRegisterAt(0)));
1428          // The runtime helper puts the result in EAX, EDX.
1429          locations->SetOut(Location::RegisterPairLocation(EAX, EDX));
1430          break;
1431        }
1432
1433        case Primitive::kPrimDouble: {
1434          // Processing a Dex `double-to-long' instruction.
1435          InvokeRuntimeCallingConvention calling_convention;
1436          // Note that on x86 floating-point parameters are passed
1437          // through core registers (here, EAX and ECX).
1438          locations->SetInAt(0, Location::RegisterPairLocation(
1439              calling_convention.GetRegisterAt(0),
1440              calling_convention.GetRegisterAt(1)));
1441          // The runtime helper puts the result in EAX, EDX.
1442          locations->SetOut(Location::RegisterPairLocation(EAX, EDX));
1443          break;
1444        }
1445          break;
1446
1447        default:
1448          LOG(FATAL) << "Unexpected type conversion from " << input_type
1449                     << " to " << result_type;
1450      }
1451      break;
1452
1453    case Primitive::kPrimChar:
1454      switch (input_type) {
1455        case Primitive::kPrimByte:
1456        case Primitive::kPrimShort:
1457        case Primitive::kPrimInt:
1458          // Processing a Dex `int-to-char' instruction.
1459          locations->SetInAt(0, Location::Any());
1460          locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1461          break;
1462
1463        default:
1464          LOG(FATAL) << "Unexpected type conversion from " << input_type
1465                     << " to " << result_type;
1466      }
1467      break;
1468
1469    case Primitive::kPrimFloat:
1470      switch (input_type) {
1471        case Primitive::kPrimByte:
1472        case Primitive::kPrimShort:
1473        case Primitive::kPrimInt:
1474        case Primitive::kPrimChar:
1475          // Processing a Dex `int-to-float' instruction.
1476          locations->SetInAt(0, Location::RequiresRegister());
1477          locations->SetOut(Location::RequiresFpuRegister());
1478          break;
1479
1480        case Primitive::kPrimLong:
1481          // Processing a Dex `long-to-float' instruction.
1482          locations->SetInAt(0, Location::RequiresRegister());
1483          locations->SetOut(Location::RequiresFpuRegister());
1484          locations->AddTemp(Location::RequiresFpuRegister());
1485          locations->AddTemp(Location::RequiresFpuRegister());
1486          break;
1487
1488        case Primitive::kPrimDouble:
1489          // Processing a Dex `double-to-float' instruction.
1490          locations->SetInAt(0, Location::RequiresFpuRegister());
1491          locations->SetOut(Location::RequiresFpuRegister(), Location::kNoOutputOverlap);
1492          break;
1493
1494        default:
1495          LOG(FATAL) << "Unexpected type conversion from " << input_type
1496                     << " to " << result_type;
1497      };
1498      break;
1499
1500    case Primitive::kPrimDouble:
1501      switch (input_type) {
1502        case Primitive::kPrimByte:
1503        case Primitive::kPrimShort:
1504        case Primitive::kPrimInt:
1505        case Primitive::kPrimChar:
1506          // Processing a Dex `int-to-double' instruction.
1507          locations->SetInAt(0, Location::RequiresRegister());
1508          locations->SetOut(Location::RequiresFpuRegister());
1509          break;
1510
1511        case Primitive::kPrimLong:
1512          // Processing a Dex `long-to-double' instruction.
1513          locations->SetInAt(0, Location::RequiresRegister());
1514          locations->SetOut(Location::RequiresFpuRegister());
1515          locations->AddTemp(Location::RequiresFpuRegister());
1516          locations->AddTemp(Location::RequiresFpuRegister());
1517          break;
1518
1519        case Primitive::kPrimFloat:
1520          // Processing a Dex `float-to-double' instruction.
1521          locations->SetInAt(0, Location::RequiresFpuRegister());
1522          locations->SetOut(Location::RequiresFpuRegister(), Location::kNoOutputOverlap);
1523          break;
1524
1525        default:
1526          LOG(FATAL) << "Unexpected type conversion from " << input_type
1527                     << " to " << result_type;
1528      }
1529      break;
1530
1531    default:
1532      LOG(FATAL) << "Unexpected type conversion from " << input_type
1533                 << " to " << result_type;
1534  }
1535}
1536
1537void InstructionCodeGeneratorX86::VisitTypeConversion(HTypeConversion* conversion) {
1538  LocationSummary* locations = conversion->GetLocations();
1539  Location out = locations->Out();
1540  Location in = locations->InAt(0);
1541  Primitive::Type result_type = conversion->GetResultType();
1542  Primitive::Type input_type = conversion->GetInputType();
1543  DCHECK_NE(result_type, input_type);
1544  switch (result_type) {
1545    case Primitive::kPrimByte:
1546      switch (input_type) {
1547        case Primitive::kPrimShort:
1548        case Primitive::kPrimInt:
1549        case Primitive::kPrimChar:
1550          // Processing a Dex `int-to-byte' instruction.
1551          if (in.IsRegister()) {
1552            __ movsxb(out.AsRegister<Register>(), in.AsRegister<ByteRegister>());
1553          } else if (in.IsStackSlot()) {
1554            __ movsxb(out.AsRegister<Register>(), Address(ESP, in.GetStackIndex()));
1555          } else {
1556            DCHECK(in.GetConstant()->IsIntConstant());
1557            int32_t value = in.GetConstant()->AsIntConstant()->GetValue();
1558            __ movl(out.AsRegister<Register>(), Immediate(static_cast<int8_t>(value)));
1559          }
1560          break;
1561
1562        default:
1563          LOG(FATAL) << "Unexpected type conversion from " << input_type
1564                     << " to " << result_type;
1565      }
1566      break;
1567
1568    case Primitive::kPrimShort:
1569      switch (input_type) {
1570        case Primitive::kPrimByte:
1571        case Primitive::kPrimInt:
1572        case Primitive::kPrimChar:
1573          // Processing a Dex `int-to-short' instruction.
1574          if (in.IsRegister()) {
1575            __ movsxw(out.AsRegister<Register>(), in.AsRegister<Register>());
1576          } else if (in.IsStackSlot()) {
1577            __ movsxw(out.AsRegister<Register>(), Address(ESP, in.GetStackIndex()));
1578          } else {
1579            DCHECK(in.GetConstant()->IsIntConstant());
1580            int32_t value = in.GetConstant()->AsIntConstant()->GetValue();
1581            __ movl(out.AsRegister<Register>(), Immediate(static_cast<int16_t>(value)));
1582          }
1583          break;
1584
1585        default:
1586          LOG(FATAL) << "Unexpected type conversion from " << input_type
1587                     << " to " << result_type;
1588      }
1589      break;
1590
1591    case Primitive::kPrimInt:
1592      switch (input_type) {
1593        case Primitive::kPrimLong:
1594          // Processing a Dex `long-to-int' instruction.
1595          if (in.IsRegisterPair()) {
1596            __ movl(out.AsRegister<Register>(), in.AsRegisterPairLow<Register>());
1597          } else if (in.IsDoubleStackSlot()) {
1598            __ movl(out.AsRegister<Register>(), Address(ESP, in.GetStackIndex()));
1599          } else {
1600            DCHECK(in.IsConstant());
1601            DCHECK(in.GetConstant()->IsLongConstant());
1602            int64_t value = in.GetConstant()->AsLongConstant()->GetValue();
1603            __ movl(out.AsRegister<Register>(), Immediate(static_cast<int32_t>(value)));
1604          }
1605          break;
1606
1607        case Primitive::kPrimFloat: {
1608          // Processing a Dex `float-to-int' instruction.
1609          XmmRegister input = in.AsFpuRegister<XmmRegister>();
1610          Register output = out.AsRegister<Register>();
1611          XmmRegister temp = locations->GetTemp(0).AsFpuRegister<XmmRegister>();
1612          Label done, nan;
1613
1614          __ movl(output, Immediate(kPrimIntMax));
1615          // temp = int-to-float(output)
1616          __ cvtsi2ss(temp, output);
1617          // if input >= temp goto done
1618          __ comiss(input, temp);
1619          __ j(kAboveEqual, &done);
1620          // if input == NaN goto nan
1621          __ j(kUnordered, &nan);
1622          // output = float-to-int-truncate(input)
1623          __ cvttss2si(output, input);
1624          __ jmp(&done);
1625          __ Bind(&nan);
1626          //  output = 0
1627          __ xorl(output, output);
1628          __ Bind(&done);
1629          break;
1630        }
1631
1632        case Primitive::kPrimDouble: {
1633          // Processing a Dex `double-to-int' instruction.
1634          XmmRegister input = in.AsFpuRegister<XmmRegister>();
1635          Register output = out.AsRegister<Register>();
1636          XmmRegister temp = locations->GetTemp(0).AsFpuRegister<XmmRegister>();
1637          Label done, nan;
1638
1639          __ movl(output, Immediate(kPrimIntMax));
1640          // temp = int-to-double(output)
1641          __ cvtsi2sd(temp, output);
1642          // if input >= temp goto done
1643          __ comisd(input, temp);
1644          __ j(kAboveEqual, &done);
1645          // if input == NaN goto nan
1646          __ j(kUnordered, &nan);
1647          // output = double-to-int-truncate(input)
1648          __ cvttsd2si(output, input);
1649          __ jmp(&done);
1650          __ Bind(&nan);
1651          //  output = 0
1652          __ xorl(output, output);
1653          __ Bind(&done);
1654          break;
1655        }
1656
1657        default:
1658          LOG(FATAL) << "Unexpected type conversion from " << input_type
1659                     << " to " << result_type;
1660      }
1661      break;
1662
1663    case Primitive::kPrimLong:
1664      switch (input_type) {
1665        case Primitive::kPrimByte:
1666        case Primitive::kPrimShort:
1667        case Primitive::kPrimInt:
1668        case Primitive::kPrimChar:
1669          // Processing a Dex `int-to-long' instruction.
1670          DCHECK_EQ(out.AsRegisterPairLow<Register>(), EAX);
1671          DCHECK_EQ(out.AsRegisterPairHigh<Register>(), EDX);
1672          DCHECK_EQ(in.AsRegister<Register>(), EAX);
1673          __ cdq();
1674          break;
1675
1676        case Primitive::kPrimFloat:
1677          // Processing a Dex `float-to-long' instruction.
1678          __ fs()->call(Address::Absolute(QUICK_ENTRYPOINT_OFFSET(kX86WordSize, pF2l)));
1679          codegen_->RecordPcInfo(conversion, conversion->GetDexPc());
1680          break;
1681
1682        case Primitive::kPrimDouble:
1683          // Processing a Dex `double-to-long' instruction.
1684          __ fs()->call(Address::Absolute(QUICK_ENTRYPOINT_OFFSET(kX86WordSize, pD2l)));
1685          codegen_->RecordPcInfo(conversion, conversion->GetDexPc());
1686          break;
1687
1688        default:
1689          LOG(FATAL) << "Unexpected type conversion from " << input_type
1690                     << " to " << result_type;
1691      }
1692      break;
1693
1694    case Primitive::kPrimChar:
1695      switch (input_type) {
1696        case Primitive::kPrimByte:
1697        case Primitive::kPrimShort:
1698        case Primitive::kPrimInt:
1699          // Processing a Dex `Process a Dex `int-to-char'' instruction.
1700          if (in.IsRegister()) {
1701            __ movzxw(out.AsRegister<Register>(), in.AsRegister<Register>());
1702          } else if (in.IsStackSlot()) {
1703            __ movzxw(out.AsRegister<Register>(), Address(ESP, in.GetStackIndex()));
1704          } else {
1705            DCHECK(in.GetConstant()->IsIntConstant());
1706            int32_t value = in.GetConstant()->AsIntConstant()->GetValue();
1707            __ movl(out.AsRegister<Register>(), Immediate(static_cast<uint16_t>(value)));
1708          }
1709          break;
1710
1711        default:
1712          LOG(FATAL) << "Unexpected type conversion from " << input_type
1713                     << " to " << result_type;
1714      }
1715      break;
1716
1717    case Primitive::kPrimFloat:
1718      switch (input_type) {
1719        case Primitive::kPrimByte:
1720        case Primitive::kPrimShort:
1721        case Primitive::kPrimInt:
1722        case Primitive::kPrimChar:
1723          // Processing a Dex `int-to-float' instruction.
1724          __ cvtsi2ss(out.AsFpuRegister<XmmRegister>(), in.AsRegister<Register>());
1725          break;
1726
1727        case Primitive::kPrimLong: {
1728          // Processing a Dex `long-to-float' instruction.
1729          Register low = in.AsRegisterPairLow<Register>();
1730          Register high = in.AsRegisterPairHigh<Register>();
1731          XmmRegister result = out.AsFpuRegister<XmmRegister>();
1732          XmmRegister temp = locations->GetTemp(0).AsFpuRegister<XmmRegister>();
1733          XmmRegister constant = locations->GetTemp(1).AsFpuRegister<XmmRegister>();
1734
1735          // Operations use doubles for precision reasons (each 32-bit
1736          // half of a long fits in the 53-bit mantissa of a double,
1737          // but not in the 24-bit mantissa of a float).  This is
1738          // especially important for the low bits.  The result is
1739          // eventually converted to float.
1740
1741          // low = low - 2^31 (to prevent bit 31 of `low` to be
1742          // interpreted as a sign bit)
1743          __ subl(low, Immediate(0x80000000));
1744          // temp = int-to-double(high)
1745          __ cvtsi2sd(temp, high);
1746          // temp = temp * 2^32
1747          __ LoadLongConstant(constant, k2Pow32EncodingForDouble);
1748          __ mulsd(temp, constant);
1749          // result = int-to-double(low)
1750          __ cvtsi2sd(result, low);
1751          // result = result + 2^31 (restore the original value of `low`)
1752          __ LoadLongConstant(constant, k2Pow31EncodingForDouble);
1753          __ addsd(result, constant);
1754          // result = result + temp
1755          __ addsd(result, temp);
1756          // result = double-to-float(result)
1757          __ cvtsd2ss(result, result);
1758          break;
1759        }
1760
1761        case Primitive::kPrimDouble:
1762          // Processing a Dex `double-to-float' instruction.
1763          __ cvtsd2ss(out.AsFpuRegister<XmmRegister>(), in.AsFpuRegister<XmmRegister>());
1764          break;
1765
1766        default:
1767          LOG(FATAL) << "Unexpected type conversion from " << input_type
1768                     << " to " << result_type;
1769      };
1770      break;
1771
1772    case Primitive::kPrimDouble:
1773      switch (input_type) {
1774        case Primitive::kPrimByte:
1775        case Primitive::kPrimShort:
1776        case Primitive::kPrimInt:
1777        case Primitive::kPrimChar:
1778          // Processing a Dex `int-to-double' instruction.
1779          __ cvtsi2sd(out.AsFpuRegister<XmmRegister>(), in.AsRegister<Register>());
1780          break;
1781
1782        case Primitive::kPrimLong: {
1783          // Processing a Dex `long-to-double' instruction.
1784          Register low = in.AsRegisterPairLow<Register>();
1785          Register high = in.AsRegisterPairHigh<Register>();
1786          XmmRegister result = out.AsFpuRegister<XmmRegister>();
1787          XmmRegister temp = locations->GetTemp(0).AsFpuRegister<XmmRegister>();
1788          XmmRegister constant = locations->GetTemp(1).AsFpuRegister<XmmRegister>();
1789
1790          // low = low - 2^31 (to prevent bit 31 of `low` to be
1791          // interpreted as a sign bit)
1792          __ subl(low, Immediate(0x80000000));
1793          // temp = int-to-double(high)
1794          __ cvtsi2sd(temp, high);
1795          // temp = temp * 2^32
1796          __ LoadLongConstant(constant, k2Pow32EncodingForDouble);
1797          __ mulsd(temp, constant);
1798          // result = int-to-double(low)
1799          __ cvtsi2sd(result, low);
1800          // result = result + 2^31 (restore the original value of `low`)
1801          __ LoadLongConstant(constant, k2Pow31EncodingForDouble);
1802          __ addsd(result, constant);
1803          // result = result + temp
1804          __ addsd(result, temp);
1805          break;
1806        }
1807
1808        case Primitive::kPrimFloat:
1809          // Processing a Dex `float-to-double' instruction.
1810          __ cvtss2sd(out.AsFpuRegister<XmmRegister>(), in.AsFpuRegister<XmmRegister>());
1811          break;
1812
1813        default:
1814          LOG(FATAL) << "Unexpected type conversion from " << input_type
1815                     << " to " << result_type;
1816      };
1817      break;
1818
1819    default:
1820      LOG(FATAL) << "Unexpected type conversion from " << input_type
1821                 << " to " << result_type;
1822  }
1823}
1824
1825void LocationsBuilderX86::VisitAdd(HAdd* add) {
1826  LocationSummary* locations =
1827      new (GetGraph()->GetArena()) LocationSummary(add, LocationSummary::kNoCall);
1828  switch (add->GetResultType()) {
1829    case Primitive::kPrimInt:
1830    case Primitive::kPrimLong: {
1831      locations->SetInAt(0, Location::RequiresRegister());
1832      locations->SetInAt(1, Location::Any());
1833      locations->SetOut(Location::SameAsFirstInput());
1834      break;
1835    }
1836
1837    case Primitive::kPrimFloat:
1838    case Primitive::kPrimDouble: {
1839      locations->SetInAt(0, Location::RequiresFpuRegister());
1840      locations->SetInAt(1, Location::Any());
1841      locations->SetOut(Location::SameAsFirstInput());
1842      break;
1843    }
1844
1845    default:
1846      LOG(FATAL) << "Unexpected add type " << add->GetResultType();
1847      break;
1848  }
1849}
1850
1851void InstructionCodeGeneratorX86::VisitAdd(HAdd* add) {
1852  LocationSummary* locations = add->GetLocations();
1853  Location first = locations->InAt(0);
1854  Location second = locations->InAt(1);
1855  DCHECK(first.Equals(locations->Out()));
1856  switch (add->GetResultType()) {
1857    case Primitive::kPrimInt: {
1858      if (second.IsRegister()) {
1859        __ addl(first.AsRegister<Register>(), second.AsRegister<Register>());
1860      } else if (second.IsConstant()) {
1861        __ addl(first.AsRegister<Register>(),
1862                Immediate(second.GetConstant()->AsIntConstant()->GetValue()));
1863      } else {
1864        __ addl(first.AsRegister<Register>(), Address(ESP, second.GetStackIndex()));
1865      }
1866      break;
1867    }
1868
1869    case Primitive::kPrimLong: {
1870      if (second.IsRegisterPair()) {
1871        __ addl(first.AsRegisterPairLow<Register>(), second.AsRegisterPairLow<Register>());
1872        __ adcl(first.AsRegisterPairHigh<Register>(), second.AsRegisterPairHigh<Register>());
1873      } else {
1874        __ addl(first.AsRegisterPairLow<Register>(), Address(ESP, second.GetStackIndex()));
1875        __ adcl(first.AsRegisterPairHigh<Register>(),
1876                Address(ESP, second.GetHighStackIndex(kX86WordSize)));
1877      }
1878      break;
1879    }
1880
1881    case Primitive::kPrimFloat: {
1882      if (second.IsFpuRegister()) {
1883        __ addss(first.AsFpuRegister<XmmRegister>(), second.AsFpuRegister<XmmRegister>());
1884      } else {
1885        __ addss(first.AsFpuRegister<XmmRegister>(), Address(ESP, second.GetStackIndex()));
1886      }
1887      break;
1888    }
1889
1890    case Primitive::kPrimDouble: {
1891      if (second.IsFpuRegister()) {
1892        __ addsd(first.AsFpuRegister<XmmRegister>(), second.AsFpuRegister<XmmRegister>());
1893      } else {
1894        __ addsd(first.AsFpuRegister<XmmRegister>(), Address(ESP, second.GetStackIndex()));
1895      }
1896      break;
1897    }
1898
1899    default:
1900      LOG(FATAL) << "Unexpected add type " << add->GetResultType();
1901  }
1902}
1903
1904void LocationsBuilderX86::VisitSub(HSub* sub) {
1905  LocationSummary* locations =
1906      new (GetGraph()->GetArena()) LocationSummary(sub, LocationSummary::kNoCall);
1907  switch (sub->GetResultType()) {
1908    case Primitive::kPrimInt:
1909    case Primitive::kPrimLong: {
1910      locations->SetInAt(0, Location::RequiresRegister());
1911      locations->SetInAt(1, Location::Any());
1912      locations->SetOut(Location::SameAsFirstInput());
1913      break;
1914    }
1915    case Primitive::kPrimFloat:
1916    case Primitive::kPrimDouble: {
1917      locations->SetInAt(0, Location::RequiresFpuRegister());
1918      locations->SetInAt(1, Location::RequiresFpuRegister());
1919      locations->SetOut(Location::SameAsFirstInput());
1920      break;
1921    }
1922
1923    default:
1924      LOG(FATAL) << "Unexpected sub type " << sub->GetResultType();
1925  }
1926}
1927
1928void InstructionCodeGeneratorX86::VisitSub(HSub* sub) {
1929  LocationSummary* locations = sub->GetLocations();
1930  Location first = locations->InAt(0);
1931  Location second = locations->InAt(1);
1932  DCHECK(first.Equals(locations->Out()));
1933  switch (sub->GetResultType()) {
1934    case Primitive::kPrimInt: {
1935      if (second.IsRegister()) {
1936        __ subl(first.AsRegister<Register>(), second.AsRegister<Register>());
1937      } else if (second.IsConstant()) {
1938        __ subl(first.AsRegister<Register>(),
1939                Immediate(second.GetConstant()->AsIntConstant()->GetValue()));
1940      } else {
1941        __ subl(first.AsRegister<Register>(), Address(ESP, second.GetStackIndex()));
1942      }
1943      break;
1944    }
1945
1946    case Primitive::kPrimLong: {
1947      if (second.IsRegisterPair()) {
1948        __ subl(first.AsRegisterPairLow<Register>(), second.AsRegisterPairLow<Register>());
1949        __ sbbl(first.AsRegisterPairHigh<Register>(), second.AsRegisterPairHigh<Register>());
1950      } else {
1951        __ subl(first.AsRegisterPairLow<Register>(), Address(ESP, second.GetStackIndex()));
1952        __ sbbl(first.AsRegisterPairHigh<Register>(),
1953                Address(ESP, second.GetHighStackIndex(kX86WordSize)));
1954      }
1955      break;
1956    }
1957
1958    case Primitive::kPrimFloat: {
1959      __ subss(first.AsFpuRegister<XmmRegister>(), second.AsFpuRegister<XmmRegister>());
1960      break;
1961    }
1962
1963    case Primitive::kPrimDouble: {
1964      __ subsd(first.AsFpuRegister<XmmRegister>(), second.AsFpuRegister<XmmRegister>());
1965      break;
1966    }
1967
1968    default:
1969      LOG(FATAL) << "Unexpected sub type " << sub->GetResultType();
1970  }
1971}
1972
1973void LocationsBuilderX86::VisitMul(HMul* mul) {
1974  LocationSummary* locations =
1975      new (GetGraph()->GetArena()) LocationSummary(mul, LocationSummary::kNoCall);
1976  switch (mul->GetResultType()) {
1977    case Primitive::kPrimInt:
1978      locations->SetInAt(0, Location::RequiresRegister());
1979      locations->SetInAt(1, Location::Any());
1980      locations->SetOut(Location::SameAsFirstInput());
1981      break;
1982    case Primitive::kPrimLong: {
1983      locations->SetInAt(0, Location::RequiresRegister());
1984      // TODO: Currently this handles only stack operands:
1985      // - we don't have enough registers because we currently use Quick ABI.
1986      // - by the time we have a working register allocator we will probably change the ABI
1987      // and fix the above.
1988      // - we don't have a way yet to request operands on stack but the base line compiler
1989      // will leave the operands on the stack with Any().
1990      locations->SetInAt(1, Location::Any());
1991      locations->SetOut(Location::SameAsFirstInput());
1992      // Needed for imul on 32bits with 64bits output.
1993      locations->AddTemp(Location::RegisterLocation(EAX));
1994      locations->AddTemp(Location::RegisterLocation(EDX));
1995      break;
1996    }
1997    case Primitive::kPrimFloat:
1998    case Primitive::kPrimDouble: {
1999      locations->SetInAt(0, Location::RequiresFpuRegister());
2000      locations->SetInAt(1, Location::RequiresFpuRegister());
2001      locations->SetOut(Location::SameAsFirstInput());
2002      break;
2003    }
2004
2005    default:
2006      LOG(FATAL) << "Unexpected mul type " << mul->GetResultType();
2007  }
2008}
2009
2010void InstructionCodeGeneratorX86::VisitMul(HMul* mul) {
2011  LocationSummary* locations = mul->GetLocations();
2012  Location first = locations->InAt(0);
2013  Location second = locations->InAt(1);
2014  DCHECK(first.Equals(locations->Out()));
2015
2016  switch (mul->GetResultType()) {
2017    case Primitive::kPrimInt: {
2018      if (second.IsRegister()) {
2019        __ imull(first.AsRegister<Register>(), second.AsRegister<Register>());
2020      } else if (second.IsConstant()) {
2021        Immediate imm(second.GetConstant()->AsIntConstant()->GetValue());
2022        __ imull(first.AsRegister<Register>(), imm);
2023      } else {
2024        DCHECK(second.IsStackSlot());
2025        __ imull(first.AsRegister<Register>(), Address(ESP, second.GetStackIndex()));
2026      }
2027      break;
2028    }
2029
2030    case Primitive::kPrimLong: {
2031      DCHECK(second.IsDoubleStackSlot());
2032
2033      Register in1_hi = first.AsRegisterPairHigh<Register>();
2034      Register in1_lo = first.AsRegisterPairLow<Register>();
2035      Address in2_hi(ESP, second.GetHighStackIndex(kX86WordSize));
2036      Address in2_lo(ESP, second.GetStackIndex());
2037      Register eax = locations->GetTemp(0).AsRegister<Register>();
2038      Register edx = locations->GetTemp(1).AsRegister<Register>();
2039
2040      DCHECK_EQ(EAX, eax);
2041      DCHECK_EQ(EDX, edx);
2042
2043      // input: in1 - 64 bits, in2 - 64 bits
2044      // output: in1
2045      // formula: in1.hi : in1.lo = (in1.lo * in2.hi + in1.hi * in2.lo)* 2^32 + in1.lo * in2.lo
2046      // parts: in1.hi = in1.lo * in2.hi + in1.hi * in2.lo + (in1.lo * in2.lo)[63:32]
2047      // parts: in1.lo = (in1.lo * in2.lo)[31:0]
2048
2049      __ movl(eax, in2_hi);
2050      // eax <- in1.lo * in2.hi
2051      __ imull(eax, in1_lo);
2052      // in1.hi <- in1.hi * in2.lo
2053      __ imull(in1_hi, in2_lo);
2054      // in1.hi <- in1.lo * in2.hi + in1.hi * in2.lo
2055      __ addl(in1_hi, eax);
2056      // move in1_lo to eax to prepare for double precision
2057      __ movl(eax, in1_lo);
2058      // edx:eax <- in1.lo * in2.lo
2059      __ mull(in2_lo);
2060      // in1.hi <- in2.hi * in1.lo +  in2.lo * in1.hi + (in1.lo * in2.lo)[63:32]
2061      __ addl(in1_hi, edx);
2062      // in1.lo <- (in1.lo * in2.lo)[31:0];
2063      __ movl(in1_lo, eax);
2064
2065      break;
2066    }
2067
2068    case Primitive::kPrimFloat: {
2069      __ mulss(first.AsFpuRegister<XmmRegister>(), second.AsFpuRegister<XmmRegister>());
2070      break;
2071    }
2072
2073    case Primitive::kPrimDouble: {
2074      __ mulsd(first.AsFpuRegister<XmmRegister>(), second.AsFpuRegister<XmmRegister>());
2075      break;
2076    }
2077
2078    default:
2079      LOG(FATAL) << "Unexpected mul type " << mul->GetResultType();
2080  }
2081}
2082
2083void InstructionCodeGeneratorX86::PushOntoFPStack(Location source, uint32_t temp_offset,
2084                                                  uint32_t stack_adjustment, bool is_float) {
2085  if (source.IsStackSlot()) {
2086    DCHECK(is_float);
2087    __ flds(Address(ESP, source.GetStackIndex() + stack_adjustment));
2088  } else if (source.IsDoubleStackSlot()) {
2089    DCHECK(!is_float);
2090    __ fldl(Address(ESP, source.GetStackIndex() + stack_adjustment));
2091  } else {
2092    // Write the value to the temporary location on the stack and load to FP stack.
2093    if (is_float) {
2094      Location stack_temp = Location::StackSlot(temp_offset);
2095      codegen_->Move32(stack_temp, source);
2096      __ flds(Address(ESP, temp_offset));
2097    } else {
2098      Location stack_temp = Location::DoubleStackSlot(temp_offset);
2099      codegen_->Move64(stack_temp, source);
2100      __ fldl(Address(ESP, temp_offset));
2101    }
2102  }
2103}
2104
2105void InstructionCodeGeneratorX86::GenerateRemFP(HRem *rem) {
2106  Primitive::Type type = rem->GetResultType();
2107  bool is_float = type == Primitive::kPrimFloat;
2108  size_t elem_size = Primitive::ComponentSize(type);
2109  LocationSummary* locations = rem->GetLocations();
2110  Location first = locations->InAt(0);
2111  Location second = locations->InAt(1);
2112  Location out = locations->Out();
2113
2114  // Create stack space for 2 elements.
2115  // TODO: enhance register allocator to ask for stack temporaries.
2116  __ subl(ESP, Immediate(2 * elem_size));
2117
2118  // Load the values to the FP stack in reverse order, using temporaries if needed.
2119  PushOntoFPStack(second, elem_size, 2 * elem_size, is_float);
2120  PushOntoFPStack(first, 0, 2 * elem_size, is_float);
2121
2122  // Loop doing FPREM until we stabilize.
2123  Label retry;
2124  __ Bind(&retry);
2125  __ fprem();
2126
2127  // Move FP status to AX.
2128  __ fstsw();
2129
2130  // And see if the argument reduction is complete. This is signaled by the
2131  // C2 FPU flag bit set to 0.
2132  __ andl(EAX, Immediate(kC2ConditionMask));
2133  __ j(kNotEqual, &retry);
2134
2135  // We have settled on the final value. Retrieve it into an XMM register.
2136  // Store FP top of stack to real stack.
2137  if (is_float) {
2138    __ fsts(Address(ESP, 0));
2139  } else {
2140    __ fstl(Address(ESP, 0));
2141  }
2142
2143  // Pop the 2 items from the FP stack.
2144  __ fucompp();
2145
2146  // Load the value from the stack into an XMM register.
2147  DCHECK(out.IsFpuRegister()) << out;
2148  if (is_float) {
2149    __ movss(out.AsFpuRegister<XmmRegister>(), Address(ESP, 0));
2150  } else {
2151    __ movsd(out.AsFpuRegister<XmmRegister>(), Address(ESP, 0));
2152  }
2153
2154  // And remove the temporary stack space we allocated.
2155  __ addl(ESP, Immediate(2 * elem_size));
2156}
2157
2158void InstructionCodeGeneratorX86::GenerateDivRemIntegral(HBinaryOperation* instruction) {
2159  DCHECK(instruction->IsDiv() || instruction->IsRem());
2160
2161  LocationSummary* locations = instruction->GetLocations();
2162  Location out = locations->Out();
2163  Location first = locations->InAt(0);
2164  Location second = locations->InAt(1);
2165  bool is_div = instruction->IsDiv();
2166
2167  switch (instruction->GetResultType()) {
2168    case Primitive::kPrimInt: {
2169      Register second_reg = second.AsRegister<Register>();
2170      DCHECK_EQ(EAX, first.AsRegister<Register>());
2171      DCHECK_EQ(is_div ? EAX : EDX, out.AsRegister<Register>());
2172
2173      SlowPathCodeX86* slow_path =
2174          new (GetGraph()->GetArena()) DivRemMinusOneSlowPathX86(out.AsRegister<Register>(),
2175                                                                 is_div);
2176      codegen_->AddSlowPath(slow_path);
2177
2178      // 0x80000000/-1 triggers an arithmetic exception!
2179      // Dividing by -1 is actually negation and -0x800000000 = 0x80000000 so
2180      // it's safe to just use negl instead of more complex comparisons.
2181
2182      __ cmpl(second_reg, Immediate(-1));
2183      __ j(kEqual, slow_path->GetEntryLabel());
2184
2185      // edx:eax <- sign-extended of eax
2186      __ cdq();
2187      // eax = quotient, edx = remainder
2188      __ idivl(second_reg);
2189
2190      __ Bind(slow_path->GetExitLabel());
2191      break;
2192    }
2193
2194    case Primitive::kPrimLong: {
2195      InvokeRuntimeCallingConvention calling_convention;
2196      DCHECK_EQ(calling_convention.GetRegisterAt(0), first.AsRegisterPairLow<Register>());
2197      DCHECK_EQ(calling_convention.GetRegisterAt(1), first.AsRegisterPairHigh<Register>());
2198      DCHECK_EQ(calling_convention.GetRegisterAt(2), second.AsRegisterPairLow<Register>());
2199      DCHECK_EQ(calling_convention.GetRegisterAt(3), second.AsRegisterPairHigh<Register>());
2200      DCHECK_EQ(EAX, out.AsRegisterPairLow<Register>());
2201      DCHECK_EQ(EDX, out.AsRegisterPairHigh<Register>());
2202
2203      if (is_div) {
2204        __ fs()->call(Address::Absolute(QUICK_ENTRYPOINT_OFFSET(kX86WordSize, pLdiv)));
2205      } else {
2206        __ fs()->call(Address::Absolute(QUICK_ENTRYPOINT_OFFSET(kX86WordSize, pLmod)));
2207      }
2208      uint32_t dex_pc = is_div
2209          ? instruction->AsDiv()->GetDexPc()
2210          : instruction->AsRem()->GetDexPc();
2211      codegen_->RecordPcInfo(instruction, dex_pc);
2212
2213      break;
2214    }
2215
2216    default:
2217      LOG(FATAL) << "Unexpected type for GenerateDivRemIntegral " << instruction->GetResultType();
2218  }
2219}
2220
2221void LocationsBuilderX86::VisitDiv(HDiv* div) {
2222  LocationSummary::CallKind call_kind = div->GetResultType() == Primitive::kPrimLong
2223      ? LocationSummary::kCall
2224      : LocationSummary::kNoCall;
2225  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(div, call_kind);
2226
2227  switch (div->GetResultType()) {
2228    case Primitive::kPrimInt: {
2229      locations->SetInAt(0, Location::RegisterLocation(EAX));
2230      locations->SetInAt(1, Location::RequiresRegister());
2231      locations->SetOut(Location::SameAsFirstInput());
2232      // Intel uses edx:eax as the dividend.
2233      locations->AddTemp(Location::RegisterLocation(EDX));
2234      break;
2235    }
2236    case Primitive::kPrimLong: {
2237      InvokeRuntimeCallingConvention calling_convention;
2238      locations->SetInAt(0, Location::RegisterPairLocation(
2239          calling_convention.GetRegisterAt(0), calling_convention.GetRegisterAt(1)));
2240      locations->SetInAt(1, Location::RegisterPairLocation(
2241          calling_convention.GetRegisterAt(2), calling_convention.GetRegisterAt(3)));
2242      // Runtime helper puts the result in EAX, EDX.
2243      locations->SetOut(Location::RegisterPairLocation(EAX, EDX));
2244      break;
2245    }
2246    case Primitive::kPrimFloat:
2247    case Primitive::kPrimDouble: {
2248      locations->SetInAt(0, Location::RequiresFpuRegister());
2249      locations->SetInAt(1, Location::RequiresFpuRegister());
2250      locations->SetOut(Location::SameAsFirstInput());
2251      break;
2252    }
2253
2254    default:
2255      LOG(FATAL) << "Unexpected div type " << div->GetResultType();
2256  }
2257}
2258
2259void InstructionCodeGeneratorX86::VisitDiv(HDiv* div) {
2260  LocationSummary* locations = div->GetLocations();
2261  Location out = locations->Out();
2262  Location first = locations->InAt(0);
2263  Location second = locations->InAt(1);
2264
2265  switch (div->GetResultType()) {
2266    case Primitive::kPrimInt:
2267    case Primitive::kPrimLong: {
2268      GenerateDivRemIntegral(div);
2269      break;
2270    }
2271
2272    case Primitive::kPrimFloat: {
2273      DCHECK(first.Equals(out));
2274      __ divss(first.AsFpuRegister<XmmRegister>(), second.AsFpuRegister<XmmRegister>());
2275      break;
2276    }
2277
2278    case Primitive::kPrimDouble: {
2279      DCHECK(first.Equals(out));
2280      __ divsd(first.AsFpuRegister<XmmRegister>(), second.AsFpuRegister<XmmRegister>());
2281      break;
2282    }
2283
2284    default:
2285      LOG(FATAL) << "Unexpected div type " << div->GetResultType();
2286  }
2287}
2288
2289void LocationsBuilderX86::VisitRem(HRem* rem) {
2290  Primitive::Type type = rem->GetResultType();
2291  LocationSummary* locations =
2292    new (GetGraph()->GetArena()) LocationSummary(rem, LocationSummary::kNoCall);
2293
2294  switch (type) {
2295    case Primitive::kPrimInt: {
2296      locations->SetInAt(0, Location::RegisterLocation(EAX));
2297      locations->SetInAt(1, Location::RequiresRegister());
2298      locations->SetOut(Location::RegisterLocation(EDX));
2299      break;
2300    }
2301    case Primitive::kPrimLong: {
2302      InvokeRuntimeCallingConvention calling_convention;
2303      locations->SetInAt(0, Location::RegisterPairLocation(
2304          calling_convention.GetRegisterAt(0), calling_convention.GetRegisterAt(1)));
2305      locations->SetInAt(1, Location::RegisterPairLocation(
2306          calling_convention.GetRegisterAt(2), calling_convention.GetRegisterAt(3)));
2307      // Runtime helper puts the result in EAX, EDX.
2308      locations->SetOut(Location::RegisterPairLocation(EAX, EDX));
2309      break;
2310    }
2311    case Primitive::kPrimDouble:
2312    case Primitive::kPrimFloat: {
2313      locations->SetInAt(0, Location::Any());
2314      locations->SetInAt(1, Location::Any());
2315      locations->SetOut(Location::RequiresFpuRegister());
2316      locations->AddTemp(Location::RegisterLocation(EAX));
2317      break;
2318    }
2319
2320    default:
2321      LOG(FATAL) << "Unexpected rem type " << type;
2322  }
2323}
2324
2325void InstructionCodeGeneratorX86::VisitRem(HRem* rem) {
2326  Primitive::Type type = rem->GetResultType();
2327  switch (type) {
2328    case Primitive::kPrimInt:
2329    case Primitive::kPrimLong: {
2330      GenerateDivRemIntegral(rem);
2331      break;
2332    }
2333    case Primitive::kPrimFloat:
2334    case Primitive::kPrimDouble: {
2335      GenerateRemFP(rem);
2336      break;
2337    }
2338    default:
2339      LOG(FATAL) << "Unexpected rem type " << type;
2340  }
2341}
2342
2343void LocationsBuilderX86::VisitDivZeroCheck(HDivZeroCheck* instruction) {
2344  LocationSummary* locations =
2345      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2346  switch (instruction->GetType()) {
2347    case Primitive::kPrimInt: {
2348      locations->SetInAt(0, Location::Any());
2349      break;
2350    }
2351    case Primitive::kPrimLong: {
2352      locations->SetInAt(0, Location::RegisterOrConstant(instruction->InputAt(0)));
2353      if (!instruction->IsConstant()) {
2354        locations->AddTemp(Location::RequiresRegister());
2355      }
2356      break;
2357    }
2358    default:
2359      LOG(FATAL) << "Unexpected type for HDivZeroCheck " << instruction->GetType();
2360  }
2361  if (instruction->HasUses()) {
2362    locations->SetOut(Location::SameAsFirstInput());
2363  }
2364}
2365
2366void InstructionCodeGeneratorX86::VisitDivZeroCheck(HDivZeroCheck* instruction) {
2367  SlowPathCodeX86* slow_path = new (GetGraph()->GetArena()) DivZeroCheckSlowPathX86(instruction);
2368  codegen_->AddSlowPath(slow_path);
2369
2370  LocationSummary* locations = instruction->GetLocations();
2371  Location value = locations->InAt(0);
2372
2373  switch (instruction->GetType()) {
2374    case Primitive::kPrimInt: {
2375      if (value.IsRegister()) {
2376        __ testl(value.AsRegister<Register>(), value.AsRegister<Register>());
2377        __ j(kEqual, slow_path->GetEntryLabel());
2378      } else if (value.IsStackSlot()) {
2379        __ cmpl(Address(ESP, value.GetStackIndex()), Immediate(0));
2380        __ j(kEqual, slow_path->GetEntryLabel());
2381      } else {
2382        DCHECK(value.IsConstant()) << value;
2383        if (value.GetConstant()->AsIntConstant()->GetValue() == 0) {
2384        __ jmp(slow_path->GetEntryLabel());
2385        }
2386      }
2387      break;
2388    }
2389    case Primitive::kPrimLong: {
2390      if (value.IsRegisterPair()) {
2391        Register temp = locations->GetTemp(0).AsRegister<Register>();
2392        __ movl(temp, value.AsRegisterPairLow<Register>());
2393        __ orl(temp, value.AsRegisterPairHigh<Register>());
2394        __ j(kEqual, slow_path->GetEntryLabel());
2395      } else {
2396        DCHECK(value.IsConstant()) << value;
2397        if (value.GetConstant()->AsLongConstant()->GetValue() == 0) {
2398          __ jmp(slow_path->GetEntryLabel());
2399        }
2400      }
2401      break;
2402    }
2403    default:
2404      LOG(FATAL) << "Unexpected type for HDivZeroCheck" << instruction->GetType();
2405  }
2406}
2407
2408void LocationsBuilderX86::HandleShift(HBinaryOperation* op) {
2409  DCHECK(op->IsShl() || op->IsShr() || op->IsUShr());
2410
2411  LocationSummary* locations =
2412      new (GetGraph()->GetArena()) LocationSummary(op, LocationSummary::kNoCall);
2413
2414  switch (op->GetResultType()) {
2415    case Primitive::kPrimInt: {
2416      locations->SetInAt(0, Location::RequiresRegister());
2417      // The shift count needs to be in CL.
2418      locations->SetInAt(1, Location::ByteRegisterOrConstant(ECX, op->InputAt(1)));
2419      locations->SetOut(Location::SameAsFirstInput());
2420      break;
2421    }
2422    case Primitive::kPrimLong: {
2423      locations->SetInAt(0, Location::RequiresRegister());
2424      // The shift count needs to be in CL.
2425      locations->SetInAt(1, Location::RegisterLocation(ECX));
2426      locations->SetOut(Location::SameAsFirstInput());
2427      break;
2428    }
2429    default:
2430      LOG(FATAL) << "Unexpected op type " << op->GetResultType();
2431  }
2432}
2433
2434void InstructionCodeGeneratorX86::HandleShift(HBinaryOperation* op) {
2435  DCHECK(op->IsShl() || op->IsShr() || op->IsUShr());
2436
2437  LocationSummary* locations = op->GetLocations();
2438  Location first = locations->InAt(0);
2439  Location second = locations->InAt(1);
2440  DCHECK(first.Equals(locations->Out()));
2441
2442  switch (op->GetResultType()) {
2443    case Primitive::kPrimInt: {
2444      Register first_reg = first.AsRegister<Register>();
2445      if (second.IsRegister()) {
2446        Register second_reg = second.AsRegister<Register>();
2447        DCHECK_EQ(ECX, second_reg);
2448        if (op->IsShl()) {
2449          __ shll(first_reg, second_reg);
2450        } else if (op->IsShr()) {
2451          __ sarl(first_reg, second_reg);
2452        } else {
2453          __ shrl(first_reg, second_reg);
2454        }
2455      } else {
2456        Immediate imm(second.GetConstant()->AsIntConstant()->GetValue() & kMaxIntShiftValue);
2457        if (op->IsShl()) {
2458          __ shll(first_reg, imm);
2459        } else if (op->IsShr()) {
2460          __ sarl(first_reg, imm);
2461        } else {
2462          __ shrl(first_reg, imm);
2463        }
2464      }
2465      break;
2466    }
2467    case Primitive::kPrimLong: {
2468      Register second_reg = second.AsRegister<Register>();
2469      DCHECK_EQ(ECX, second_reg);
2470      if (op->IsShl()) {
2471        GenerateShlLong(first, second_reg);
2472      } else if (op->IsShr()) {
2473        GenerateShrLong(first, second_reg);
2474      } else {
2475        GenerateUShrLong(first, second_reg);
2476      }
2477      break;
2478    }
2479    default:
2480      LOG(FATAL) << "Unexpected op type " << op->GetResultType();
2481  }
2482}
2483
2484void InstructionCodeGeneratorX86::GenerateShlLong(const Location& loc, Register shifter) {
2485  Label done;
2486  __ shld(loc.AsRegisterPairHigh<Register>(), loc.AsRegisterPairLow<Register>(), shifter);
2487  __ shll(loc.AsRegisterPairLow<Register>(), shifter);
2488  __ testl(shifter, Immediate(32));
2489  __ j(kEqual, &done);
2490  __ movl(loc.AsRegisterPairHigh<Register>(), loc.AsRegisterPairLow<Register>());
2491  __ movl(loc.AsRegisterPairLow<Register>(), Immediate(0));
2492  __ Bind(&done);
2493}
2494
2495void InstructionCodeGeneratorX86::GenerateShrLong(const Location& loc, Register shifter) {
2496  Label done;
2497  __ shrd(loc.AsRegisterPairLow<Register>(), loc.AsRegisterPairHigh<Register>(), shifter);
2498  __ sarl(loc.AsRegisterPairHigh<Register>(), shifter);
2499  __ testl(shifter, Immediate(32));
2500  __ j(kEqual, &done);
2501  __ movl(loc.AsRegisterPairLow<Register>(), loc.AsRegisterPairHigh<Register>());
2502  __ sarl(loc.AsRegisterPairHigh<Register>(), Immediate(31));
2503  __ Bind(&done);
2504}
2505
2506void InstructionCodeGeneratorX86::GenerateUShrLong(const Location& loc, Register shifter) {
2507  Label done;
2508  __ shrd(loc.AsRegisterPairLow<Register>(), loc.AsRegisterPairHigh<Register>(), shifter);
2509  __ shrl(loc.AsRegisterPairHigh<Register>(), shifter);
2510  __ testl(shifter, Immediate(32));
2511  __ j(kEqual, &done);
2512  __ movl(loc.AsRegisterPairLow<Register>(), loc.AsRegisterPairHigh<Register>());
2513  __ movl(loc.AsRegisterPairHigh<Register>(), Immediate(0));
2514  __ Bind(&done);
2515}
2516
2517void LocationsBuilderX86::VisitShl(HShl* shl) {
2518  HandleShift(shl);
2519}
2520
2521void InstructionCodeGeneratorX86::VisitShl(HShl* shl) {
2522  HandleShift(shl);
2523}
2524
2525void LocationsBuilderX86::VisitShr(HShr* shr) {
2526  HandleShift(shr);
2527}
2528
2529void InstructionCodeGeneratorX86::VisitShr(HShr* shr) {
2530  HandleShift(shr);
2531}
2532
2533void LocationsBuilderX86::VisitUShr(HUShr* ushr) {
2534  HandleShift(ushr);
2535}
2536
2537void InstructionCodeGeneratorX86::VisitUShr(HUShr* ushr) {
2538  HandleShift(ushr);
2539}
2540
2541void LocationsBuilderX86::VisitNewInstance(HNewInstance* instruction) {
2542  LocationSummary* locations =
2543      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kCall);
2544  locations->SetOut(Location::RegisterLocation(EAX));
2545  InvokeRuntimeCallingConvention calling_convention;
2546  locations->AddTemp(Location::RegisterLocation(calling_convention.GetRegisterAt(0)));
2547  locations->AddTemp(Location::RegisterLocation(calling_convention.GetRegisterAt(1)));
2548}
2549
2550void InstructionCodeGeneratorX86::VisitNewInstance(HNewInstance* instruction) {
2551  InvokeRuntimeCallingConvention calling_convention;
2552  codegen_->LoadCurrentMethod(calling_convention.GetRegisterAt(1));
2553  __ movl(calling_convention.GetRegisterAt(0), Immediate(instruction->GetTypeIndex()));
2554
2555  __ fs()->call(
2556      Address::Absolute(QUICK_ENTRYPOINT_OFFSET(kX86WordSize, pAllocObjectWithAccessCheck)));
2557
2558  codegen_->RecordPcInfo(instruction, instruction->GetDexPc());
2559  DCHECK(!codegen_->IsLeafMethod());
2560}
2561
2562void LocationsBuilderX86::VisitNewArray(HNewArray* instruction) {
2563  LocationSummary* locations =
2564      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kCall);
2565  locations->SetOut(Location::RegisterLocation(EAX));
2566  InvokeRuntimeCallingConvention calling_convention;
2567  locations->AddTemp(Location::RegisterLocation(calling_convention.GetRegisterAt(0)));
2568  locations->AddTemp(Location::RegisterLocation(calling_convention.GetRegisterAt(2)));
2569  locations->SetInAt(0, Location::RegisterLocation(calling_convention.GetRegisterAt(1)));
2570}
2571
2572void InstructionCodeGeneratorX86::VisitNewArray(HNewArray* instruction) {
2573  InvokeRuntimeCallingConvention calling_convention;
2574  codegen_->LoadCurrentMethod(calling_convention.GetRegisterAt(2));
2575  __ movl(calling_convention.GetRegisterAt(0), Immediate(instruction->GetTypeIndex()));
2576
2577  __ fs()->call(
2578      Address::Absolute(QUICK_ENTRYPOINT_OFFSET(kX86WordSize, pAllocArrayWithAccessCheck)));
2579
2580  codegen_->RecordPcInfo(instruction, instruction->GetDexPc());
2581  DCHECK(!codegen_->IsLeafMethod());
2582}
2583
2584void LocationsBuilderX86::VisitParameterValue(HParameterValue* instruction) {
2585  LocationSummary* locations =
2586      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2587  Location location = parameter_visitor_.GetNextLocation(instruction->GetType());
2588  if (location.IsStackSlot()) {
2589    location = Location::StackSlot(location.GetStackIndex() + codegen_->GetFrameSize());
2590  } else if (location.IsDoubleStackSlot()) {
2591    location = Location::DoubleStackSlot(location.GetStackIndex() + codegen_->GetFrameSize());
2592  }
2593  locations->SetOut(location);
2594}
2595
2596void InstructionCodeGeneratorX86::VisitParameterValue(HParameterValue* instruction) {
2597  UNUSED(instruction);
2598}
2599
2600void LocationsBuilderX86::VisitNot(HNot* not_) {
2601  LocationSummary* locations =
2602      new (GetGraph()->GetArena()) LocationSummary(not_, LocationSummary::kNoCall);
2603  locations->SetInAt(0, Location::RequiresRegister());
2604  locations->SetOut(Location::SameAsFirstInput());
2605}
2606
2607void InstructionCodeGeneratorX86::VisitNot(HNot* not_) {
2608  LocationSummary* locations = not_->GetLocations();
2609  Location in = locations->InAt(0);
2610  Location out = locations->Out();
2611  DCHECK(in.Equals(out));
2612  switch (not_->InputAt(0)->GetType()) {
2613    case Primitive::kPrimInt:
2614      __ notl(out.AsRegister<Register>());
2615      break;
2616
2617    case Primitive::kPrimLong:
2618      __ notl(out.AsRegisterPairLow<Register>());
2619      __ notl(out.AsRegisterPairHigh<Register>());
2620      break;
2621
2622    default:
2623      LOG(FATAL) << "Unimplemented type for not operation " << not_->GetResultType();
2624  }
2625}
2626
2627void LocationsBuilderX86::VisitCompare(HCompare* compare) {
2628  LocationSummary* locations =
2629      new (GetGraph()->GetArena()) LocationSummary(compare, LocationSummary::kNoCall);
2630  switch (compare->InputAt(0)->GetType()) {
2631    case Primitive::kPrimLong: {
2632      locations->SetInAt(0, Location::RequiresRegister());
2633      // TODO: we set any here but we don't handle constants
2634      locations->SetInAt(1, Location::Any());
2635      locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
2636      break;
2637    }
2638    case Primitive::kPrimFloat:
2639    case Primitive::kPrimDouble: {
2640      locations->SetInAt(0, Location::RequiresFpuRegister());
2641      locations->SetInAt(1, Location::RequiresFpuRegister());
2642      locations->SetOut(Location::RequiresRegister());
2643      break;
2644    }
2645    default:
2646      LOG(FATAL) << "Unexpected type for compare operation " << compare->InputAt(0)->GetType();
2647  }
2648}
2649
2650void InstructionCodeGeneratorX86::VisitCompare(HCompare* compare) {
2651  LocationSummary* locations = compare->GetLocations();
2652  Register out = locations->Out().AsRegister<Register>();
2653  Location left = locations->InAt(0);
2654  Location right = locations->InAt(1);
2655
2656  Label less, greater, done;
2657  switch (compare->InputAt(0)->GetType()) {
2658    case Primitive::kPrimLong: {
2659      if (right.IsRegisterPair()) {
2660        __ cmpl(left.AsRegisterPairHigh<Register>(), right.AsRegisterPairHigh<Register>());
2661      } else {
2662        DCHECK(right.IsDoubleStackSlot());
2663        __ cmpl(left.AsRegisterPairHigh<Register>(),
2664                Address(ESP, right.GetHighStackIndex(kX86WordSize)));
2665      }
2666      __ j(kLess, &less);  // Signed compare.
2667      __ j(kGreater, &greater);  // Signed compare.
2668      if (right.IsRegisterPair()) {
2669        __ cmpl(left.AsRegisterPairLow<Register>(), right.AsRegisterPairLow<Register>());
2670      } else {
2671        DCHECK(right.IsDoubleStackSlot());
2672        __ cmpl(left.AsRegisterPairLow<Register>(), Address(ESP, right.GetStackIndex()));
2673      }
2674      break;
2675    }
2676    case Primitive::kPrimFloat: {
2677      __ ucomiss(left.AsFpuRegister<XmmRegister>(), right.AsFpuRegister<XmmRegister>());
2678      __ j(kUnordered, compare->IsGtBias() ? &greater : &less);
2679      break;
2680    }
2681    case Primitive::kPrimDouble: {
2682      __ ucomisd(left.AsFpuRegister<XmmRegister>(), right.AsFpuRegister<XmmRegister>());
2683      __ j(kUnordered, compare->IsGtBias() ? &greater : &less);
2684      break;
2685    }
2686    default:
2687      LOG(FATAL) << "Unexpected type for compare operation " << compare->InputAt(0)->GetType();
2688  }
2689  __ movl(out, Immediate(0));
2690  __ j(kEqual, &done);
2691  __ j(kBelow, &less);  // kBelow is for CF (unsigned & floats).
2692
2693  __ Bind(&greater);
2694  __ movl(out, Immediate(1));
2695  __ jmp(&done);
2696
2697  __ Bind(&less);
2698  __ movl(out, Immediate(-1));
2699
2700  __ Bind(&done);
2701}
2702
2703void LocationsBuilderX86::VisitPhi(HPhi* instruction) {
2704  LocationSummary* locations =
2705      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2706  for (size_t i = 0, e = instruction->InputCount(); i < e; ++i) {
2707    locations->SetInAt(i, Location::Any());
2708  }
2709  locations->SetOut(Location::Any());
2710}
2711
2712void InstructionCodeGeneratorX86::VisitPhi(HPhi* instruction) {
2713  UNUSED(instruction);
2714  LOG(FATAL) << "Unreachable";
2715}
2716
2717void InstructionCodeGeneratorX86::GenerateMemoryBarrier(MemBarrierKind kind) {
2718  /*
2719   * According to the JSR-133 Cookbook, for x86 only StoreLoad/AnyAny barriers need memory fence.
2720   * All other barriers (LoadAny, AnyStore, StoreStore) are nops due to the x86 memory model.
2721   * For those cases, all we need to ensure is that there is a scheduling barrier in place.
2722   */
2723  switch (kind) {
2724    case MemBarrierKind::kAnyAny: {
2725      __ mfence();
2726      break;
2727    }
2728    case MemBarrierKind::kAnyStore:
2729    case MemBarrierKind::kLoadAny:
2730    case MemBarrierKind::kStoreStore: {
2731      // nop
2732      break;
2733    }
2734    default:
2735      LOG(FATAL) << "Unexpected memory barrier " << kind;
2736  }
2737}
2738
2739
2740void CodeGeneratorX86::MarkGCCard(Register temp, Register card, Register object, Register value) {
2741  Label is_null;
2742  __ testl(value, value);
2743  __ j(kEqual, &is_null);
2744  __ fs()->movl(card, Address::Absolute(Thread::CardTableOffset<kX86WordSize>().Int32Value()));
2745  __ movl(temp, object);
2746  __ shrl(temp, Immediate(gc::accounting::CardTable::kCardShift));
2747  __ movb(Address(temp, card, TIMES_1, 0),
2748          X86ManagedRegister::FromCpuRegister(card).AsByteRegister());
2749  __ Bind(&is_null);
2750}
2751
2752void LocationsBuilderX86::HandleFieldGet(HInstruction* instruction, const FieldInfo& field_info) {
2753  DCHECK(instruction->IsInstanceFieldGet() || instruction->IsStaticFieldGet());
2754  LocationSummary* locations =
2755      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2756  locations->SetInAt(0, Location::RequiresRegister());
2757  locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
2758
2759  if (field_info.IsVolatile() && (field_info.GetFieldType() == Primitive::kPrimLong)) {
2760    // Long values can be loaded atomically into an XMM using movsd.
2761    // So we use an XMM register as a temp to achieve atomicity (first load the temp into the XMM
2762    // and then copy the XMM into the output 32bits at a time).
2763    locations->AddTemp(Location::RequiresFpuRegister());
2764  }
2765}
2766
2767void InstructionCodeGeneratorX86::HandleFieldGet(HInstruction* instruction,
2768                                                 const FieldInfo& field_info) {
2769  DCHECK(instruction->IsInstanceFieldGet() || instruction->IsStaticFieldGet());
2770
2771  LocationSummary* locations = instruction->GetLocations();
2772  Register base = locations->InAt(0).AsRegister<Register>();
2773  Location out = locations->Out();
2774  bool is_volatile = field_info.IsVolatile();
2775  Primitive::Type field_type = field_info.GetFieldType();
2776  uint32_t offset = field_info.GetFieldOffset().Uint32Value();
2777
2778  switch (field_type) {
2779    case Primitive::kPrimBoolean: {
2780      __ movzxb(out.AsRegister<Register>(), Address(base, offset));
2781      break;
2782    }
2783
2784    case Primitive::kPrimByte: {
2785      __ movsxb(out.AsRegister<Register>(), Address(base, offset));
2786      break;
2787    }
2788
2789    case Primitive::kPrimShort: {
2790      __ movsxw(out.AsRegister<Register>(), Address(base, offset));
2791      break;
2792    }
2793
2794    case Primitive::kPrimChar: {
2795      __ movzxw(out.AsRegister<Register>(), Address(base, offset));
2796      break;
2797    }
2798
2799    case Primitive::kPrimInt:
2800    case Primitive::kPrimNot: {
2801      __ movl(out.AsRegister<Register>(), Address(base, offset));
2802      break;
2803    }
2804
2805    case Primitive::kPrimLong: {
2806      if (is_volatile) {
2807        XmmRegister temp = locations->GetTemp(0).AsFpuRegister<XmmRegister>();
2808        __ movsd(temp, Address(base, offset));
2809        codegen_->MaybeRecordImplicitNullCheck(instruction);
2810        __ movd(out.AsRegisterPairLow<Register>(), temp);
2811        __ psrlq(temp, Immediate(32));
2812        __ movd(out.AsRegisterPairHigh<Register>(), temp);
2813      } else {
2814        __ movl(out.AsRegisterPairLow<Register>(), Address(base, offset));
2815        codegen_->MaybeRecordImplicitNullCheck(instruction);
2816        __ movl(out.AsRegisterPairHigh<Register>(), Address(base, kX86WordSize + offset));
2817      }
2818      break;
2819    }
2820
2821    case Primitive::kPrimFloat: {
2822      __ movss(out.AsFpuRegister<XmmRegister>(), Address(base, offset));
2823      break;
2824    }
2825
2826    case Primitive::kPrimDouble: {
2827      __ movsd(out.AsFpuRegister<XmmRegister>(), Address(base, offset));
2828      break;
2829    }
2830
2831    case Primitive::kPrimVoid:
2832      LOG(FATAL) << "Unreachable type " << field_type;
2833      UNREACHABLE();
2834  }
2835
2836  // Longs are handled in the switch.
2837  if (field_type != Primitive::kPrimLong) {
2838    codegen_->MaybeRecordImplicitNullCheck(instruction);
2839  }
2840
2841  if (is_volatile) {
2842    GenerateMemoryBarrier(MemBarrierKind::kLoadAny);
2843  }
2844}
2845
2846void LocationsBuilderX86::HandleFieldSet(HInstruction* instruction, const FieldInfo& field_info) {
2847  DCHECK(instruction->IsInstanceFieldSet() || instruction->IsStaticFieldSet());
2848
2849  LocationSummary* locations =
2850      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2851  locations->SetInAt(0, Location::RequiresRegister());
2852  bool is_volatile = field_info.IsVolatile();
2853  Primitive::Type field_type = field_info.GetFieldType();
2854  bool is_byte_type = (field_type == Primitive::kPrimBoolean)
2855    || (field_type == Primitive::kPrimByte);
2856
2857  // The register allocator does not support multiple
2858  // inputs that die at entry with one in a specific register.
2859  if (is_byte_type) {
2860    // Ensure the value is in a byte register.
2861    locations->SetInAt(1, Location::RegisterLocation(EAX));
2862  } else {
2863    locations->SetInAt(1, Location::RequiresRegister());
2864  }
2865  // Temporary registers for the write barrier.
2866  if (CodeGenerator::StoreNeedsWriteBarrier(field_type, instruction->InputAt(1))) {
2867    locations->AddTemp(Location::RequiresRegister());
2868    // Ensure the card is in a byte register.
2869    locations->AddTemp(Location::RegisterLocation(ECX));
2870  } else if (is_volatile && (field_type == Primitive::kPrimLong)) {
2871    // 64bits value can be atomically written to an address with movsd and an XMM register.
2872    // We need two XMM registers because there's no easier way to (bit) copy a register pair
2873    // into a single XMM register (we copy each pair part into the XMMs and then interleave them).
2874    // NB: We could make the register allocator understand fp_reg <-> core_reg moves but given the
2875    // isolated cases when we need this it isn't worth adding the extra complexity.
2876    locations->AddTemp(Location::RequiresFpuRegister());
2877    locations->AddTemp(Location::RequiresFpuRegister());
2878  }
2879}
2880
2881void InstructionCodeGeneratorX86::HandleFieldSet(HInstruction* instruction,
2882                                                 const FieldInfo& field_info) {
2883  DCHECK(instruction->IsInstanceFieldSet() || instruction->IsStaticFieldSet());
2884
2885  LocationSummary* locations = instruction->GetLocations();
2886  Register base = locations->InAt(0).AsRegister<Register>();
2887  Location value = locations->InAt(1);
2888  bool is_volatile = field_info.IsVolatile();
2889  Primitive::Type field_type = field_info.GetFieldType();
2890  uint32_t offset = field_info.GetFieldOffset().Uint32Value();
2891
2892  if (is_volatile) {
2893    GenerateMemoryBarrier(MemBarrierKind::kAnyStore);
2894  }
2895
2896  switch (field_type) {
2897    case Primitive::kPrimBoolean:
2898    case Primitive::kPrimByte: {
2899      __ movb(Address(base, offset), value.AsRegister<ByteRegister>());
2900      break;
2901    }
2902
2903    case Primitive::kPrimShort:
2904    case Primitive::kPrimChar: {
2905      __ movw(Address(base, offset), value.AsRegister<Register>());
2906      break;
2907    }
2908
2909    case Primitive::kPrimInt:
2910    case Primitive::kPrimNot: {
2911      __ movl(Address(base, offset), value.AsRegister<Register>());
2912      break;
2913    }
2914
2915    case Primitive::kPrimLong: {
2916      if (is_volatile) {
2917        XmmRegister temp1 = locations->GetTemp(0).AsFpuRegister<XmmRegister>();
2918        XmmRegister temp2 = locations->GetTemp(1).AsFpuRegister<XmmRegister>();
2919        __ movd(temp1, value.AsRegisterPairLow<Register>());
2920        __ movd(temp2, value.AsRegisterPairHigh<Register>());
2921        __ punpckldq(temp1, temp2);
2922        __ movsd(Address(base, offset), temp1);
2923        codegen_->MaybeRecordImplicitNullCheck(instruction);
2924      } else {
2925        __ movl(Address(base, offset), value.AsRegisterPairLow<Register>());
2926        codegen_->MaybeRecordImplicitNullCheck(instruction);
2927        __ movl(Address(base, kX86WordSize + offset), value.AsRegisterPairHigh<Register>());
2928      }
2929      break;
2930    }
2931
2932    case Primitive::kPrimFloat: {
2933      __ movss(Address(base, offset), value.AsFpuRegister<XmmRegister>());
2934      break;
2935    }
2936
2937    case Primitive::kPrimDouble: {
2938      __ movsd(Address(base, offset), value.AsFpuRegister<XmmRegister>());
2939      break;
2940    }
2941
2942    case Primitive::kPrimVoid:
2943      LOG(FATAL) << "Unreachable type " << field_type;
2944      UNREACHABLE();
2945  }
2946
2947  // Longs are handled in the switch.
2948  if (field_type != Primitive::kPrimLong) {
2949    codegen_->MaybeRecordImplicitNullCheck(instruction);
2950  }
2951
2952  if (CodeGenerator::StoreNeedsWriteBarrier(field_type, instruction->InputAt(1))) {
2953    Register temp = locations->GetTemp(0).AsRegister<Register>();
2954    Register card = locations->GetTemp(1).AsRegister<Register>();
2955    codegen_->MarkGCCard(temp, card, base, value.AsRegister<Register>());
2956  }
2957
2958  if (is_volatile) {
2959    GenerateMemoryBarrier(MemBarrierKind::kAnyAny);
2960  }
2961}
2962
2963void LocationsBuilderX86::VisitStaticFieldGet(HStaticFieldGet* instruction) {
2964  HandleFieldGet(instruction, instruction->GetFieldInfo());
2965}
2966
2967void InstructionCodeGeneratorX86::VisitStaticFieldGet(HStaticFieldGet* instruction) {
2968  HandleFieldGet(instruction, instruction->GetFieldInfo());
2969}
2970
2971void LocationsBuilderX86::VisitStaticFieldSet(HStaticFieldSet* instruction) {
2972  HandleFieldSet(instruction, instruction->GetFieldInfo());
2973}
2974
2975void InstructionCodeGeneratorX86::VisitStaticFieldSet(HStaticFieldSet* instruction) {
2976  HandleFieldSet(instruction, instruction->GetFieldInfo());
2977}
2978
2979void LocationsBuilderX86::VisitInstanceFieldSet(HInstanceFieldSet* instruction) {
2980  HandleFieldSet(instruction, instruction->GetFieldInfo());
2981}
2982
2983void InstructionCodeGeneratorX86::VisitInstanceFieldSet(HInstanceFieldSet* instruction) {
2984  HandleFieldSet(instruction, instruction->GetFieldInfo());
2985}
2986
2987void LocationsBuilderX86::VisitInstanceFieldGet(HInstanceFieldGet* instruction) {
2988  HandleFieldGet(instruction, instruction->GetFieldInfo());
2989}
2990
2991void InstructionCodeGeneratorX86::VisitInstanceFieldGet(HInstanceFieldGet* instruction) {
2992  HandleFieldGet(instruction, instruction->GetFieldInfo());
2993}
2994
2995void LocationsBuilderX86::VisitNullCheck(HNullCheck* instruction) {
2996  LocationSummary* locations =
2997      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2998  Location loc = codegen_->GetCompilerOptions().GetImplicitNullChecks()
2999      ? Location::RequiresRegister()
3000      : Location::Any();
3001  locations->SetInAt(0, loc);
3002  if (instruction->HasUses()) {
3003    locations->SetOut(Location::SameAsFirstInput());
3004  }
3005}
3006
3007void InstructionCodeGeneratorX86::GenerateImplicitNullCheck(HNullCheck* instruction) {
3008  if (codegen_->CanMoveNullCheckToUser(instruction)) {
3009    return;
3010  }
3011  LocationSummary* locations = instruction->GetLocations();
3012  Location obj = locations->InAt(0);
3013
3014  __ testl(EAX, Address(obj.AsRegister<Register>(), 0));
3015  codegen_->RecordPcInfo(instruction, instruction->GetDexPc());
3016}
3017
3018void InstructionCodeGeneratorX86::GenerateExplicitNullCheck(HNullCheck* instruction) {
3019  SlowPathCodeX86* slow_path = new (GetGraph()->GetArena()) NullCheckSlowPathX86(instruction);
3020  codegen_->AddSlowPath(slow_path);
3021
3022  LocationSummary* locations = instruction->GetLocations();
3023  Location obj = locations->InAt(0);
3024
3025  if (obj.IsRegister()) {
3026    __ cmpl(obj.AsRegister<Register>(), Immediate(0));
3027  } else if (obj.IsStackSlot()) {
3028    __ cmpl(Address(ESP, obj.GetStackIndex()), Immediate(0));
3029  } else {
3030    DCHECK(obj.IsConstant()) << obj;
3031    DCHECK_EQ(obj.GetConstant()->AsIntConstant()->GetValue(), 0);
3032    __ jmp(slow_path->GetEntryLabel());
3033    return;
3034  }
3035  __ j(kEqual, slow_path->GetEntryLabel());
3036}
3037
3038void InstructionCodeGeneratorX86::VisitNullCheck(HNullCheck* instruction) {
3039  if (codegen_->GetCompilerOptions().GetImplicitNullChecks()) {
3040    GenerateImplicitNullCheck(instruction);
3041  } else {
3042    GenerateExplicitNullCheck(instruction);
3043  }
3044}
3045
3046void LocationsBuilderX86::VisitArrayGet(HArrayGet* instruction) {
3047  LocationSummary* locations =
3048      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
3049  locations->SetInAt(0, Location::RequiresRegister());
3050  locations->SetInAt(1, Location::RegisterOrConstant(instruction->InputAt(1)));
3051  locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
3052}
3053
3054void InstructionCodeGeneratorX86::VisitArrayGet(HArrayGet* instruction) {
3055  LocationSummary* locations = instruction->GetLocations();
3056  Register obj = locations->InAt(0).AsRegister<Register>();
3057  Location index = locations->InAt(1);
3058
3059  Primitive::Type type = instruction->GetType();
3060  switch (type) {
3061    case Primitive::kPrimBoolean: {
3062      uint32_t data_offset = mirror::Array::DataOffset(sizeof(uint8_t)).Uint32Value();
3063      Register out = locations->Out().AsRegister<Register>();
3064      if (index.IsConstant()) {
3065        __ movzxb(out, Address(obj,
3066            (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_1) + data_offset));
3067      } else {
3068        __ movzxb(out, Address(obj, index.AsRegister<Register>(), TIMES_1, data_offset));
3069      }
3070      break;
3071    }
3072
3073    case Primitive::kPrimByte: {
3074      uint32_t data_offset = mirror::Array::DataOffset(sizeof(int8_t)).Uint32Value();
3075      Register out = locations->Out().AsRegister<Register>();
3076      if (index.IsConstant()) {
3077        __ movsxb(out, Address(obj,
3078            (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_1) + data_offset));
3079      } else {
3080        __ movsxb(out, Address(obj, index.AsRegister<Register>(), TIMES_1, data_offset));
3081      }
3082      break;
3083    }
3084
3085    case Primitive::kPrimShort: {
3086      uint32_t data_offset = mirror::Array::DataOffset(sizeof(int16_t)).Uint32Value();
3087      Register out = locations->Out().AsRegister<Register>();
3088      if (index.IsConstant()) {
3089        __ movsxw(out, Address(obj,
3090            (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_2) + data_offset));
3091      } else {
3092        __ movsxw(out, Address(obj, index.AsRegister<Register>(), TIMES_2, data_offset));
3093      }
3094      break;
3095    }
3096
3097    case Primitive::kPrimChar: {
3098      uint32_t data_offset = mirror::Array::DataOffset(sizeof(uint16_t)).Uint32Value();
3099      Register out = locations->Out().AsRegister<Register>();
3100      if (index.IsConstant()) {
3101        __ movzxw(out, Address(obj,
3102            (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_2) + data_offset));
3103      } else {
3104        __ movzxw(out, Address(obj, index.AsRegister<Register>(), TIMES_2, data_offset));
3105      }
3106      break;
3107    }
3108
3109    case Primitive::kPrimInt:
3110    case Primitive::kPrimNot: {
3111      uint32_t data_offset = mirror::Array::DataOffset(sizeof(int32_t)).Uint32Value();
3112      Register out = locations->Out().AsRegister<Register>();
3113      if (index.IsConstant()) {
3114        __ movl(out, Address(obj,
3115            (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_4) + data_offset));
3116      } else {
3117        __ movl(out, Address(obj, index.AsRegister<Register>(), TIMES_4, data_offset));
3118      }
3119      break;
3120    }
3121
3122    case Primitive::kPrimLong: {
3123      uint32_t data_offset = mirror::Array::DataOffset(sizeof(int64_t)).Uint32Value();
3124      Location out = locations->Out();
3125      if (index.IsConstant()) {
3126        size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_8) + data_offset;
3127        __ movl(out.AsRegisterPairLow<Register>(), Address(obj, offset));
3128        codegen_->MaybeRecordImplicitNullCheck(instruction);
3129        __ movl(out.AsRegisterPairHigh<Register>(), Address(obj, offset + kX86WordSize));
3130      } else {
3131        __ movl(out.AsRegisterPairLow<Register>(),
3132                Address(obj, index.AsRegister<Register>(), TIMES_8, data_offset));
3133        codegen_->MaybeRecordImplicitNullCheck(instruction);
3134        __ movl(out.AsRegisterPairHigh<Register>(),
3135                Address(obj, index.AsRegister<Register>(), TIMES_8, data_offset + kX86WordSize));
3136      }
3137      break;
3138    }
3139
3140    case Primitive::kPrimFloat:
3141    case Primitive::kPrimDouble:
3142      LOG(FATAL) << "Unimplemented register type " << type;
3143      UNREACHABLE();
3144    case Primitive::kPrimVoid:
3145      LOG(FATAL) << "Unreachable type " << type;
3146      UNREACHABLE();
3147  }
3148
3149  if (type != Primitive::kPrimLong) {
3150    codegen_->MaybeRecordImplicitNullCheck(instruction);
3151  }
3152}
3153
3154void LocationsBuilderX86::VisitArraySet(HArraySet* instruction) {
3155  Primitive::Type value_type = instruction->GetComponentType();
3156  bool needs_write_barrier =
3157      CodeGenerator::StoreNeedsWriteBarrier(value_type, instruction->GetValue());
3158
3159  DCHECK(kFollowsQuickABI);
3160  bool not_enough_registers = needs_write_barrier
3161      && !instruction->GetValue()->IsConstant()
3162      && !instruction->GetIndex()->IsConstant();
3163  bool needs_runtime_call = instruction->NeedsTypeCheck() || not_enough_registers;
3164
3165  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(
3166      instruction,
3167      needs_runtime_call ? LocationSummary::kCall : LocationSummary::kNoCall);
3168
3169  if (needs_runtime_call) {
3170    InvokeRuntimeCallingConvention calling_convention;
3171    locations->SetInAt(0, Location::RegisterLocation(calling_convention.GetRegisterAt(0)));
3172    locations->SetInAt(1, Location::RegisterLocation(calling_convention.GetRegisterAt(1)));
3173    locations->SetInAt(2, Location::RegisterLocation(calling_convention.GetRegisterAt(2)));
3174  } else {
3175    bool is_byte_type = (value_type == Primitive::kPrimBoolean)
3176        || (value_type == Primitive::kPrimByte);
3177    // We need the inputs to be different than the output in case of long operation.
3178    // In case of a byte operation, the register allocator does not support multiple
3179    // inputs that die at entry with one in a specific register.
3180    locations->SetInAt(0, Location::RequiresRegister());
3181    locations->SetInAt(1, Location::RegisterOrConstant(instruction->InputAt(1)));
3182    if (is_byte_type) {
3183      // Ensure the value is in a byte register.
3184      locations->SetInAt(2, Location::ByteRegisterOrConstant(EAX, instruction->InputAt(2)));
3185    } else {
3186      locations->SetInAt(2, Location::RegisterOrConstant(instruction->InputAt(2)));
3187    }
3188    // Temporary registers for the write barrier.
3189    if (needs_write_barrier) {
3190      locations->AddTemp(Location::RequiresRegister());
3191      // Ensure the card is in a byte register.
3192      locations->AddTemp(Location::RegisterLocation(ECX));
3193    }
3194  }
3195}
3196
3197void InstructionCodeGeneratorX86::VisitArraySet(HArraySet* instruction) {
3198  LocationSummary* locations = instruction->GetLocations();
3199  Register obj = locations->InAt(0).AsRegister<Register>();
3200  Location index = locations->InAt(1);
3201  Location value = locations->InAt(2);
3202  Primitive::Type value_type = instruction->GetComponentType();
3203  bool needs_runtime_call = locations->WillCall();
3204  bool needs_write_barrier =
3205      CodeGenerator::StoreNeedsWriteBarrier(value_type, instruction->GetValue());
3206
3207  switch (value_type) {
3208    case Primitive::kPrimBoolean:
3209    case Primitive::kPrimByte: {
3210      uint32_t data_offset = mirror::Array::DataOffset(sizeof(uint8_t)).Uint32Value();
3211      if (index.IsConstant()) {
3212        size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_1) + data_offset;
3213        if (value.IsRegister()) {
3214          __ movb(Address(obj, offset), value.AsRegister<ByteRegister>());
3215        } else {
3216          __ movb(Address(obj, offset),
3217                  Immediate(value.GetConstant()->AsIntConstant()->GetValue()));
3218        }
3219      } else {
3220        if (value.IsRegister()) {
3221          __ movb(Address(obj, index.AsRegister<Register>(), TIMES_1, data_offset),
3222                  value.AsRegister<ByteRegister>());
3223        } else {
3224          __ movb(Address(obj, index.AsRegister<Register>(), TIMES_1, data_offset),
3225                  Immediate(value.GetConstant()->AsIntConstant()->GetValue()));
3226        }
3227      }
3228      codegen_->MaybeRecordImplicitNullCheck(instruction);
3229      break;
3230    }
3231
3232    case Primitive::kPrimShort:
3233    case Primitive::kPrimChar: {
3234      uint32_t data_offset = mirror::Array::DataOffset(sizeof(uint16_t)).Uint32Value();
3235      if (index.IsConstant()) {
3236        size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_2) + data_offset;
3237        if (value.IsRegister()) {
3238          __ movw(Address(obj, offset), value.AsRegister<Register>());
3239        } else {
3240          __ movw(Address(obj, offset),
3241                  Immediate(value.GetConstant()->AsIntConstant()->GetValue()));
3242        }
3243      } else {
3244        if (value.IsRegister()) {
3245          __ movw(Address(obj, index.AsRegister<Register>(), TIMES_2, data_offset),
3246                  value.AsRegister<Register>());
3247        } else {
3248          __ movw(Address(obj, index.AsRegister<Register>(), TIMES_2, data_offset),
3249                  Immediate(value.GetConstant()->AsIntConstant()->GetValue()));
3250        }
3251      }
3252      codegen_->MaybeRecordImplicitNullCheck(instruction);
3253      break;
3254    }
3255
3256    case Primitive::kPrimInt:
3257    case Primitive::kPrimNot: {
3258      if (!needs_runtime_call) {
3259        uint32_t data_offset = mirror::Array::DataOffset(sizeof(int32_t)).Uint32Value();
3260        if (index.IsConstant()) {
3261          size_t offset =
3262              (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_4) + data_offset;
3263          if (value.IsRegister()) {
3264            __ movl(Address(obj, offset), value.AsRegister<Register>());
3265          } else {
3266            DCHECK(value.IsConstant()) << value;
3267            __ movl(Address(obj, offset),
3268                    Immediate(value.GetConstant()->AsIntConstant()->GetValue()));
3269          }
3270        } else {
3271          DCHECK(index.IsRegister()) << index;
3272          if (value.IsRegister()) {
3273            __ movl(Address(obj, index.AsRegister<Register>(), TIMES_4, data_offset),
3274                    value.AsRegister<Register>());
3275          } else {
3276            DCHECK(value.IsConstant()) << value;
3277            __ movl(Address(obj, index.AsRegister<Register>(), TIMES_4, data_offset),
3278                    Immediate(value.GetConstant()->AsIntConstant()->GetValue()));
3279          }
3280        }
3281        codegen_->MaybeRecordImplicitNullCheck(instruction);
3282
3283        if (needs_write_barrier) {
3284          Register temp = locations->GetTemp(0).AsRegister<Register>();
3285          Register card = locations->GetTemp(1).AsRegister<Register>();
3286          codegen_->MarkGCCard(temp, card, obj, value.AsRegister<Register>());
3287        }
3288      } else {
3289        DCHECK_EQ(value_type, Primitive::kPrimNot);
3290        DCHECK(!codegen_->IsLeafMethod());
3291        __ fs()->call(Address::Absolute(QUICK_ENTRYPOINT_OFFSET(kX86WordSize, pAputObject)));
3292        codegen_->RecordPcInfo(instruction, instruction->GetDexPc());
3293      }
3294      break;
3295    }
3296
3297    case Primitive::kPrimLong: {
3298      uint32_t data_offset = mirror::Array::DataOffset(sizeof(int64_t)).Uint32Value();
3299      if (index.IsConstant()) {
3300        size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_8) + data_offset;
3301        if (value.IsRegisterPair()) {
3302          __ movl(Address(obj, offset), value.AsRegisterPairLow<Register>());
3303          codegen_->MaybeRecordImplicitNullCheck(instruction);
3304          __ movl(Address(obj, offset + kX86WordSize), value.AsRegisterPairHigh<Register>());
3305        } else {
3306          DCHECK(value.IsConstant());
3307          int64_t val = value.GetConstant()->AsLongConstant()->GetValue();
3308          __ movl(Address(obj, offset), Immediate(Low32Bits(val)));
3309          codegen_->MaybeRecordImplicitNullCheck(instruction);
3310          __ movl(Address(obj, offset + kX86WordSize), Immediate(High32Bits(val)));
3311        }
3312      } else {
3313        if (value.IsRegisterPair()) {
3314          __ movl(Address(obj, index.AsRegister<Register>(), TIMES_8, data_offset),
3315                  value.AsRegisterPairLow<Register>());
3316          codegen_->MaybeRecordImplicitNullCheck(instruction);
3317          __ movl(Address(obj, index.AsRegister<Register>(), TIMES_8, data_offset + kX86WordSize),
3318                  value.AsRegisterPairHigh<Register>());
3319        } else {
3320          DCHECK(value.IsConstant());
3321          int64_t val = value.GetConstant()->AsLongConstant()->GetValue();
3322          __ movl(Address(obj, index.AsRegister<Register>(), TIMES_8, data_offset),
3323                  Immediate(Low32Bits(val)));
3324          codegen_->MaybeRecordImplicitNullCheck(instruction);
3325          __ movl(Address(obj, index.AsRegister<Register>(), TIMES_8, data_offset + kX86WordSize),
3326                  Immediate(High32Bits(val)));
3327        }
3328      }
3329      break;
3330    }
3331
3332    case Primitive::kPrimFloat:
3333    case Primitive::kPrimDouble:
3334      LOG(FATAL) << "Unimplemented register type " << instruction->GetType();
3335      UNREACHABLE();
3336    case Primitive::kPrimVoid:
3337      LOG(FATAL) << "Unreachable type " << instruction->GetType();
3338      UNREACHABLE();
3339  }
3340}
3341
3342void LocationsBuilderX86::VisitArrayLength(HArrayLength* instruction) {
3343  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instruction);
3344  locations->SetInAt(0, Location::RequiresRegister());
3345  locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
3346  instruction->SetLocations(locations);
3347}
3348
3349void InstructionCodeGeneratorX86::VisitArrayLength(HArrayLength* instruction) {
3350  LocationSummary* locations = instruction->GetLocations();
3351  uint32_t offset = mirror::Array::LengthOffset().Uint32Value();
3352  Register obj = locations->InAt(0).AsRegister<Register>();
3353  Register out = locations->Out().AsRegister<Register>();
3354  __ movl(out, Address(obj, offset));
3355  codegen_->MaybeRecordImplicitNullCheck(instruction);
3356}
3357
3358void LocationsBuilderX86::VisitBoundsCheck(HBoundsCheck* instruction) {
3359  LocationSummary* locations =
3360      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
3361  locations->SetInAt(0, Location::RequiresRegister());
3362  locations->SetInAt(1, Location::RequiresRegister());
3363  if (instruction->HasUses()) {
3364    locations->SetOut(Location::SameAsFirstInput());
3365  }
3366}
3367
3368void InstructionCodeGeneratorX86::VisitBoundsCheck(HBoundsCheck* instruction) {
3369  LocationSummary* locations = instruction->GetLocations();
3370  SlowPathCodeX86* slow_path = new (GetGraph()->GetArena()) BoundsCheckSlowPathX86(
3371      instruction, locations->InAt(0), locations->InAt(1));
3372  codegen_->AddSlowPath(slow_path);
3373
3374  Register index = locations->InAt(0).AsRegister<Register>();
3375  Register length = locations->InAt(1).AsRegister<Register>();
3376
3377  __ cmpl(index, length);
3378  __ j(kAboveEqual, slow_path->GetEntryLabel());
3379}
3380
3381void LocationsBuilderX86::VisitTemporary(HTemporary* temp) {
3382  temp->SetLocations(nullptr);
3383}
3384
3385void InstructionCodeGeneratorX86::VisitTemporary(HTemporary* temp) {
3386  // Nothing to do, this is driven by the code generator.
3387  UNUSED(temp);
3388}
3389
3390void LocationsBuilderX86::VisitParallelMove(HParallelMove* instruction) {
3391  UNUSED(instruction);
3392  LOG(FATAL) << "Unreachable";
3393}
3394
3395void InstructionCodeGeneratorX86::VisitParallelMove(HParallelMove* instruction) {
3396  codegen_->GetMoveResolver()->EmitNativeCode(instruction);
3397}
3398
3399void LocationsBuilderX86::VisitSuspendCheck(HSuspendCheck* instruction) {
3400  new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kCallOnSlowPath);
3401}
3402
3403void InstructionCodeGeneratorX86::VisitSuspendCheck(HSuspendCheck* instruction) {
3404  HBasicBlock* block = instruction->GetBlock();
3405  if (block->GetLoopInformation() != nullptr) {
3406    DCHECK(block->GetLoopInformation()->GetSuspendCheck() == instruction);
3407    // The back edge will generate the suspend check.
3408    return;
3409  }
3410  if (block->IsEntryBlock() && instruction->GetNext()->IsGoto()) {
3411    // The goto will generate the suspend check.
3412    return;
3413  }
3414  GenerateSuspendCheck(instruction, nullptr);
3415}
3416
3417void InstructionCodeGeneratorX86::GenerateSuspendCheck(HSuspendCheck* instruction,
3418                                                       HBasicBlock* successor) {
3419  SuspendCheckSlowPathX86* slow_path =
3420      new (GetGraph()->GetArena()) SuspendCheckSlowPathX86(instruction, successor);
3421  codegen_->AddSlowPath(slow_path);
3422  __ fs()->cmpw(Address::Absolute(
3423      Thread::ThreadFlagsOffset<kX86WordSize>().Int32Value()), Immediate(0));
3424  if (successor == nullptr) {
3425    __ j(kNotEqual, slow_path->GetEntryLabel());
3426    __ Bind(slow_path->GetReturnLabel());
3427  } else {
3428    __ j(kEqual, codegen_->GetLabelOf(successor));
3429    __ jmp(slow_path->GetEntryLabel());
3430  }
3431}
3432
3433X86Assembler* ParallelMoveResolverX86::GetAssembler() const {
3434  return codegen_->GetAssembler();
3435}
3436
3437void ParallelMoveResolverX86::MoveMemoryToMemory(int dst, int src) {
3438  ScratchRegisterScope ensure_scratch(
3439      this, kNoRegister, EAX, codegen_->GetNumberOfCoreRegisters());
3440  int stack_offset = ensure_scratch.IsSpilled() ? kX86WordSize : 0;
3441  __ movl(static_cast<Register>(ensure_scratch.GetRegister()), Address(ESP, src + stack_offset));
3442  __ movl(Address(ESP, dst + stack_offset), static_cast<Register>(ensure_scratch.GetRegister()));
3443}
3444
3445void ParallelMoveResolverX86::EmitMove(size_t index) {
3446  MoveOperands* move = moves_.Get(index);
3447  Location source = move->GetSource();
3448  Location destination = move->GetDestination();
3449
3450  if (source.IsRegister()) {
3451    if (destination.IsRegister()) {
3452      __ movl(destination.AsRegister<Register>(), source.AsRegister<Register>());
3453    } else {
3454      DCHECK(destination.IsStackSlot());
3455      __ movl(Address(ESP, destination.GetStackIndex()), source.AsRegister<Register>());
3456    }
3457  } else if (source.IsStackSlot()) {
3458    if (destination.IsRegister()) {
3459      __ movl(destination.AsRegister<Register>(), Address(ESP, source.GetStackIndex()));
3460    } else {
3461      DCHECK(destination.IsStackSlot());
3462      MoveMemoryToMemory(destination.GetStackIndex(),
3463                         source.GetStackIndex());
3464    }
3465  } else if (source.IsConstant()) {
3466    HIntConstant* instruction = source.GetConstant()->AsIntConstant();
3467    Immediate imm(instruction->AsIntConstant()->GetValue());
3468    if (destination.IsRegister()) {
3469      __ movl(destination.AsRegister<Register>(), imm);
3470    } else {
3471      __ movl(Address(ESP, destination.GetStackIndex()), imm);
3472    }
3473  } else {
3474    LOG(FATAL) << "Unimplemented move: " << destination << " <- " << source;
3475  }
3476}
3477
3478void ParallelMoveResolverX86::Exchange(Register reg, int mem) {
3479  Register suggested_scratch = reg == EAX ? EBX : EAX;
3480  ScratchRegisterScope ensure_scratch(
3481      this, reg, suggested_scratch, codegen_->GetNumberOfCoreRegisters());
3482
3483  int stack_offset = ensure_scratch.IsSpilled() ? kX86WordSize : 0;
3484  __ movl(static_cast<Register>(ensure_scratch.GetRegister()), Address(ESP, mem + stack_offset));
3485  __ movl(Address(ESP, mem + stack_offset), reg);
3486  __ movl(reg, static_cast<Register>(ensure_scratch.GetRegister()));
3487}
3488
3489void ParallelMoveResolverX86::Exchange(int mem1, int mem2) {
3490  ScratchRegisterScope ensure_scratch1(
3491      this, kNoRegister, EAX, codegen_->GetNumberOfCoreRegisters());
3492
3493  Register suggested_scratch = ensure_scratch1.GetRegister() == EAX ? EBX : EAX;
3494  ScratchRegisterScope ensure_scratch2(
3495      this, ensure_scratch1.GetRegister(), suggested_scratch, codegen_->GetNumberOfCoreRegisters());
3496
3497  int stack_offset = ensure_scratch1.IsSpilled() ? kX86WordSize : 0;
3498  stack_offset += ensure_scratch2.IsSpilled() ? kX86WordSize : 0;
3499  __ movl(static_cast<Register>(ensure_scratch1.GetRegister()), Address(ESP, mem1 + stack_offset));
3500  __ movl(static_cast<Register>(ensure_scratch2.GetRegister()), Address(ESP, mem2 + stack_offset));
3501  __ movl(Address(ESP, mem2 + stack_offset), static_cast<Register>(ensure_scratch1.GetRegister()));
3502  __ movl(Address(ESP, mem1 + stack_offset), static_cast<Register>(ensure_scratch2.GetRegister()));
3503}
3504
3505void ParallelMoveResolverX86::EmitSwap(size_t index) {
3506  MoveOperands* move = moves_.Get(index);
3507  Location source = move->GetSource();
3508  Location destination = move->GetDestination();
3509
3510  if (source.IsRegister() && destination.IsRegister()) {
3511    __ xchgl(destination.AsRegister<Register>(), source.AsRegister<Register>());
3512  } else if (source.IsRegister() && destination.IsStackSlot()) {
3513    Exchange(source.AsRegister<Register>(), destination.GetStackIndex());
3514  } else if (source.IsStackSlot() && destination.IsRegister()) {
3515    Exchange(destination.AsRegister<Register>(), source.GetStackIndex());
3516  } else if (source.IsStackSlot() && destination.IsStackSlot()) {
3517    Exchange(destination.GetStackIndex(), source.GetStackIndex());
3518  } else {
3519    LOG(FATAL) << "Unimplemented";
3520  }
3521}
3522
3523void ParallelMoveResolverX86::SpillScratch(int reg) {
3524  __ pushl(static_cast<Register>(reg));
3525}
3526
3527void ParallelMoveResolverX86::RestoreScratch(int reg) {
3528  __ popl(static_cast<Register>(reg));
3529}
3530
3531void LocationsBuilderX86::VisitLoadClass(HLoadClass* cls) {
3532  LocationSummary::CallKind call_kind = cls->CanCallRuntime()
3533      ? LocationSummary::kCallOnSlowPath
3534      : LocationSummary::kNoCall;
3535  LocationSummary* locations =
3536      new (GetGraph()->GetArena()) LocationSummary(cls, call_kind);
3537  locations->SetOut(Location::RequiresRegister());
3538}
3539
3540void InstructionCodeGeneratorX86::VisitLoadClass(HLoadClass* cls) {
3541  Register out = cls->GetLocations()->Out().AsRegister<Register>();
3542  if (cls->IsReferrersClass()) {
3543    DCHECK(!cls->CanCallRuntime());
3544    DCHECK(!cls->MustGenerateClinitCheck());
3545    codegen_->LoadCurrentMethod(out);
3546    __ movl(out, Address(out, mirror::ArtMethod::DeclaringClassOffset().Int32Value()));
3547  } else {
3548    DCHECK(cls->CanCallRuntime());
3549    codegen_->LoadCurrentMethod(out);
3550    __ movl(out, Address(out, mirror::ArtMethod::DexCacheResolvedTypesOffset().Int32Value()));
3551    __ movl(out, Address(out, CodeGenerator::GetCacheOffset(cls->GetTypeIndex())));
3552
3553    SlowPathCodeX86* slow_path = new (GetGraph()->GetArena()) LoadClassSlowPathX86(
3554        cls, cls, cls->GetDexPc(), cls->MustGenerateClinitCheck());
3555    codegen_->AddSlowPath(slow_path);
3556    __ testl(out, out);
3557    __ j(kEqual, slow_path->GetEntryLabel());
3558    if (cls->MustGenerateClinitCheck()) {
3559      GenerateClassInitializationCheck(slow_path, out);
3560    } else {
3561      __ Bind(slow_path->GetExitLabel());
3562    }
3563  }
3564}
3565
3566void LocationsBuilderX86::VisitClinitCheck(HClinitCheck* check) {
3567  LocationSummary* locations =
3568      new (GetGraph()->GetArena()) LocationSummary(check, LocationSummary::kCallOnSlowPath);
3569  locations->SetInAt(0, Location::RequiresRegister());
3570  if (check->HasUses()) {
3571    locations->SetOut(Location::SameAsFirstInput());
3572  }
3573}
3574
3575void InstructionCodeGeneratorX86::VisitClinitCheck(HClinitCheck* check) {
3576  // We assume the class to not be null.
3577  SlowPathCodeX86* slow_path = new (GetGraph()->GetArena()) LoadClassSlowPathX86(
3578      check->GetLoadClass(), check, check->GetDexPc(), true);
3579  codegen_->AddSlowPath(slow_path);
3580  GenerateClassInitializationCheck(slow_path,
3581                                   check->GetLocations()->InAt(0).AsRegister<Register>());
3582}
3583
3584void InstructionCodeGeneratorX86::GenerateClassInitializationCheck(
3585    SlowPathCodeX86* slow_path, Register class_reg) {
3586  __ cmpl(Address(class_reg,  mirror::Class::StatusOffset().Int32Value()),
3587          Immediate(mirror::Class::kStatusInitialized));
3588  __ j(kLess, slow_path->GetEntryLabel());
3589  __ Bind(slow_path->GetExitLabel());
3590  // No need for memory fence, thanks to the X86 memory model.
3591}
3592
3593void LocationsBuilderX86::VisitLoadString(HLoadString* load) {
3594  LocationSummary* locations =
3595      new (GetGraph()->GetArena()) LocationSummary(load, LocationSummary::kCallOnSlowPath);
3596  locations->SetOut(Location::RequiresRegister());
3597}
3598
3599void InstructionCodeGeneratorX86::VisitLoadString(HLoadString* load) {
3600  SlowPathCodeX86* slow_path = new (GetGraph()->GetArena()) LoadStringSlowPathX86(load);
3601  codegen_->AddSlowPath(slow_path);
3602
3603  Register out = load->GetLocations()->Out().AsRegister<Register>();
3604  codegen_->LoadCurrentMethod(out);
3605  __ movl(out, Address(out, mirror::ArtMethod::DeclaringClassOffset().Int32Value()));
3606  __ movl(out, Address(out, mirror::Class::DexCacheStringsOffset().Int32Value()));
3607  __ movl(out, Address(out, CodeGenerator::GetCacheOffset(load->GetStringIndex())));
3608  __ testl(out, out);
3609  __ j(kEqual, slow_path->GetEntryLabel());
3610  __ Bind(slow_path->GetExitLabel());
3611}
3612
3613void LocationsBuilderX86::VisitLoadException(HLoadException* load) {
3614  LocationSummary* locations =
3615      new (GetGraph()->GetArena()) LocationSummary(load, LocationSummary::kNoCall);
3616  locations->SetOut(Location::RequiresRegister());
3617}
3618
3619void InstructionCodeGeneratorX86::VisitLoadException(HLoadException* load) {
3620  Address address = Address::Absolute(Thread::ExceptionOffset<kX86WordSize>().Int32Value());
3621  __ fs()->movl(load->GetLocations()->Out().AsRegister<Register>(), address);
3622  __ fs()->movl(address, Immediate(0));
3623}
3624
3625void LocationsBuilderX86::VisitThrow(HThrow* instruction) {
3626  LocationSummary* locations =
3627      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kCall);
3628  InvokeRuntimeCallingConvention calling_convention;
3629  locations->SetInAt(0, Location::RegisterLocation(calling_convention.GetRegisterAt(0)));
3630}
3631
3632void InstructionCodeGeneratorX86::VisitThrow(HThrow* instruction) {
3633  __ fs()->call(Address::Absolute(QUICK_ENTRYPOINT_OFFSET(kX86WordSize, pDeliverException)));
3634  codegen_->RecordPcInfo(instruction, instruction->GetDexPc());
3635}
3636
3637void LocationsBuilderX86::VisitInstanceOf(HInstanceOf* instruction) {
3638  LocationSummary::CallKind call_kind = instruction->IsClassFinal()
3639      ? LocationSummary::kNoCall
3640      : LocationSummary::kCallOnSlowPath;
3641  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instruction, call_kind);
3642  locations->SetInAt(0, Location::RequiresRegister());
3643  locations->SetInAt(1, Location::Any());
3644  locations->SetOut(Location::RequiresRegister());
3645}
3646
3647void InstructionCodeGeneratorX86::VisitInstanceOf(HInstanceOf* instruction) {
3648  LocationSummary* locations = instruction->GetLocations();
3649  Register obj = locations->InAt(0).AsRegister<Register>();
3650  Location cls = locations->InAt(1);
3651  Register out = locations->Out().AsRegister<Register>();
3652  uint32_t class_offset = mirror::Object::ClassOffset().Int32Value();
3653  Label done, zero;
3654  SlowPathCodeX86* slow_path = nullptr;
3655
3656  // Return 0 if `obj` is null.
3657  // TODO: avoid this check if we know obj is not null.
3658  __ testl(obj, obj);
3659  __ j(kEqual, &zero);
3660  __ movl(out, Address(obj, class_offset));
3661  // Compare the class of `obj` with `cls`.
3662  if (cls.IsRegister()) {
3663    __ cmpl(out, cls.AsRegister<Register>());
3664  } else {
3665    DCHECK(cls.IsStackSlot()) << cls;
3666    __ cmpl(out, Address(ESP, cls.GetStackIndex()));
3667  }
3668
3669  if (instruction->IsClassFinal()) {
3670    // Classes must be equal for the instanceof to succeed.
3671    __ j(kNotEqual, &zero);
3672    __ movl(out, Immediate(1));
3673    __ jmp(&done);
3674  } else {
3675    // If the classes are not equal, we go into a slow path.
3676    DCHECK(locations->OnlyCallsOnSlowPath());
3677    slow_path = new (GetGraph()->GetArena()) TypeCheckSlowPathX86(
3678        instruction, locations->InAt(1), locations->Out(), instruction->GetDexPc());
3679    codegen_->AddSlowPath(slow_path);
3680    __ j(kNotEqual, slow_path->GetEntryLabel());
3681    __ movl(out, Immediate(1));
3682    __ jmp(&done);
3683  }
3684  __ Bind(&zero);
3685  __ movl(out, Immediate(0));
3686  if (slow_path != nullptr) {
3687    __ Bind(slow_path->GetExitLabel());
3688  }
3689  __ Bind(&done);
3690}
3691
3692void LocationsBuilderX86::VisitCheckCast(HCheckCast* instruction) {
3693  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(
3694      instruction, LocationSummary::kCallOnSlowPath);
3695  locations->SetInAt(0, Location::RequiresRegister());
3696  locations->SetInAt(1, Location::Any());
3697  locations->AddTemp(Location::RequiresRegister());
3698}
3699
3700void InstructionCodeGeneratorX86::VisitCheckCast(HCheckCast* instruction) {
3701  LocationSummary* locations = instruction->GetLocations();
3702  Register obj = locations->InAt(0).AsRegister<Register>();
3703  Location cls = locations->InAt(1);
3704  Register temp = locations->GetTemp(0).AsRegister<Register>();
3705  uint32_t class_offset = mirror::Object::ClassOffset().Int32Value();
3706  SlowPathCodeX86* slow_path = new (GetGraph()->GetArena()) TypeCheckSlowPathX86(
3707      instruction, locations->InAt(1), locations->GetTemp(0), instruction->GetDexPc());
3708  codegen_->AddSlowPath(slow_path);
3709
3710  // TODO: avoid this check if we know obj is not null.
3711  __ testl(obj, obj);
3712  __ j(kEqual, slow_path->GetExitLabel());
3713  __ movl(temp, Address(obj, class_offset));
3714
3715  // Compare the class of `obj` with `cls`.
3716  if (cls.IsRegister()) {
3717    __ cmpl(temp, cls.AsRegister<Register>());
3718  } else {
3719    DCHECK(cls.IsStackSlot()) << cls;
3720    __ cmpl(temp, Address(ESP, cls.GetStackIndex()));
3721  }
3722
3723  __ j(kNotEqual, slow_path->GetEntryLabel());
3724  __ Bind(slow_path->GetExitLabel());
3725}
3726
3727void LocationsBuilderX86::VisitMonitorOperation(HMonitorOperation* instruction) {
3728  LocationSummary* locations =
3729      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kCall);
3730  InvokeRuntimeCallingConvention calling_convention;
3731  locations->SetInAt(0, Location::RegisterLocation(calling_convention.GetRegisterAt(0)));
3732}
3733
3734void InstructionCodeGeneratorX86::VisitMonitorOperation(HMonitorOperation* instruction) {
3735  __ fs()->call(Address::Absolute(instruction->IsEnter()
3736        ? QUICK_ENTRYPOINT_OFFSET(kX86WordSize, pLockObject)
3737        : QUICK_ENTRYPOINT_OFFSET(kX86WordSize, pUnlockObject)));
3738  codegen_->RecordPcInfo(instruction, instruction->GetDexPc());
3739}
3740
3741void LocationsBuilderX86::VisitAnd(HAnd* instruction) { HandleBitwiseOperation(instruction); }
3742void LocationsBuilderX86::VisitOr(HOr* instruction) { HandleBitwiseOperation(instruction); }
3743void LocationsBuilderX86::VisitXor(HXor* instruction) { HandleBitwiseOperation(instruction); }
3744
3745void LocationsBuilderX86::HandleBitwiseOperation(HBinaryOperation* instruction) {
3746  LocationSummary* locations =
3747      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
3748  DCHECK(instruction->GetResultType() == Primitive::kPrimInt
3749         || instruction->GetResultType() == Primitive::kPrimLong);
3750  locations->SetInAt(0, Location::RequiresRegister());
3751  locations->SetInAt(1, Location::Any());
3752  locations->SetOut(Location::SameAsFirstInput());
3753}
3754
3755void InstructionCodeGeneratorX86::VisitAnd(HAnd* instruction) {
3756  HandleBitwiseOperation(instruction);
3757}
3758
3759void InstructionCodeGeneratorX86::VisitOr(HOr* instruction) {
3760  HandleBitwiseOperation(instruction);
3761}
3762
3763void InstructionCodeGeneratorX86::VisitXor(HXor* instruction) {
3764  HandleBitwiseOperation(instruction);
3765}
3766
3767void InstructionCodeGeneratorX86::HandleBitwiseOperation(HBinaryOperation* instruction) {
3768  LocationSummary* locations = instruction->GetLocations();
3769  Location first = locations->InAt(0);
3770  Location second = locations->InAt(1);
3771  DCHECK(first.Equals(locations->Out()));
3772
3773  if (instruction->GetResultType() == Primitive::kPrimInt) {
3774    if (second.IsRegister()) {
3775      if (instruction->IsAnd()) {
3776        __ andl(first.AsRegister<Register>(), second.AsRegister<Register>());
3777      } else if (instruction->IsOr()) {
3778        __ orl(first.AsRegister<Register>(), second.AsRegister<Register>());
3779      } else {
3780        DCHECK(instruction->IsXor());
3781        __ xorl(first.AsRegister<Register>(), second.AsRegister<Register>());
3782      }
3783    } else if (second.IsConstant()) {
3784      if (instruction->IsAnd()) {
3785        __ andl(first.AsRegister<Register>(),
3786                Immediate(second.GetConstant()->AsIntConstant()->GetValue()));
3787      } else if (instruction->IsOr()) {
3788        __ orl(first.AsRegister<Register>(),
3789               Immediate(second.GetConstant()->AsIntConstant()->GetValue()));
3790      } else {
3791        DCHECK(instruction->IsXor());
3792        __ xorl(first.AsRegister<Register>(),
3793                Immediate(second.GetConstant()->AsIntConstant()->GetValue()));
3794      }
3795    } else {
3796      if (instruction->IsAnd()) {
3797        __ andl(first.AsRegister<Register>(), Address(ESP, second.GetStackIndex()));
3798      } else if (instruction->IsOr()) {
3799        __ orl(first.AsRegister<Register>(), Address(ESP, second.GetStackIndex()));
3800      } else {
3801        DCHECK(instruction->IsXor());
3802        __ xorl(first.AsRegister<Register>(), Address(ESP, second.GetStackIndex()));
3803      }
3804    }
3805  } else {
3806    DCHECK_EQ(instruction->GetResultType(), Primitive::kPrimLong);
3807    if (second.IsRegisterPair()) {
3808      if (instruction->IsAnd()) {
3809        __ andl(first.AsRegisterPairLow<Register>(), second.AsRegisterPairLow<Register>());
3810        __ andl(first.AsRegisterPairHigh<Register>(), second.AsRegisterPairHigh<Register>());
3811      } else if (instruction->IsOr()) {
3812        __ orl(first.AsRegisterPairLow<Register>(), second.AsRegisterPairLow<Register>());
3813        __ orl(first.AsRegisterPairHigh<Register>(), second.AsRegisterPairHigh<Register>());
3814      } else {
3815        DCHECK(instruction->IsXor());
3816        __ xorl(first.AsRegisterPairLow<Register>(), second.AsRegisterPairLow<Register>());
3817        __ xorl(first.AsRegisterPairHigh<Register>(), second.AsRegisterPairHigh<Register>());
3818      }
3819    } else {
3820      if (instruction->IsAnd()) {
3821        __ andl(first.AsRegisterPairLow<Register>(), Address(ESP, second.GetStackIndex()));
3822        __ andl(first.AsRegisterPairHigh<Register>(),
3823                Address(ESP, second.GetHighStackIndex(kX86WordSize)));
3824      } else if (instruction->IsOr()) {
3825        __ orl(first.AsRegisterPairLow<Register>(), Address(ESP, second.GetStackIndex()));
3826        __ orl(first.AsRegisterPairHigh<Register>(),
3827                Address(ESP, second.GetHighStackIndex(kX86WordSize)));
3828      } else {
3829        DCHECK(instruction->IsXor());
3830        __ xorl(first.AsRegisterPairLow<Register>(), Address(ESP, second.GetStackIndex()));
3831        __ xorl(first.AsRegisterPairHigh<Register>(),
3832                Address(ESP, second.GetHighStackIndex(kX86WordSize)));
3833      }
3834    }
3835  }
3836}
3837
3838}  // namespace x86
3839}  // namespace art
3840