code_generator_arm.cc revision cff137481eda0eb8dbdf9d2a303ae2bdac2c7322 
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_arm.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/arm/assembler_arm.h"
26#include "utils/arm/managed_register_arm.h"
27#include "utils/assembler.h"
28#include "utils/stack_checks.h"
29
30namespace art {
31
32namespace arm {
33
34static DRegister FromLowSToD(SRegister reg) {
35  DCHECK_EQ(reg % 2, 0);
36  return static_cast<DRegister>(reg / 2);
37}
38
39static constexpr bool kExplicitStackOverflowCheck = false;
40
41static constexpr int kNumberOfPushedRegistersAtEntry = 1 + 2;  // LR, R6, R7
42static constexpr int kCurrentMethodStackOffset = 0;
43
44static constexpr Register kRuntimeParameterCoreRegisters[] = { R0, R1, R2, R3 };
45static constexpr size_t kRuntimeParameterCoreRegistersLength =
46    arraysize(kRuntimeParameterCoreRegisters);
47static constexpr SRegister kRuntimeParameterFpuRegisters[] = { };
48static constexpr size_t kRuntimeParameterFpuRegistersLength = 0;
49
50class InvokeRuntimeCallingConvention : public CallingConvention<Register, SRegister> {
51 public:
52  InvokeRuntimeCallingConvention()
53      : CallingConvention(kRuntimeParameterCoreRegisters,
54                          kRuntimeParameterCoreRegistersLength,
55                          kRuntimeParameterFpuRegisters,
56                          kRuntimeParameterFpuRegistersLength) {}
57
58 private:
59  DISALLOW_COPY_AND_ASSIGN(InvokeRuntimeCallingConvention);
60};
61
62#define __ reinterpret_cast<ArmAssembler*>(codegen->GetAssembler())->
63#define QUICK_ENTRY_POINT(x) QUICK_ENTRYPOINT_OFFSET(kArmWordSize, x).Int32Value()
64
65class SlowPathCodeARM : public SlowPathCode {
66 public:
67  SlowPathCodeARM() : entry_label_(), exit_label_() {}
68
69  Label* GetEntryLabel() { return &entry_label_; }
70  Label* GetExitLabel() { return &exit_label_; }
71
72 private:
73  Label entry_label_;
74  Label exit_label_;
75
76  DISALLOW_COPY_AND_ASSIGN(SlowPathCodeARM);
77};
78
79class NullCheckSlowPathARM : public SlowPathCodeARM {
80 public:
81  explicit NullCheckSlowPathARM(HNullCheck* instruction) : instruction_(instruction) {}
82
83  virtual void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
84    CodeGeneratorARM* arm_codegen = down_cast<CodeGeneratorARM*>(codegen);
85    __ Bind(GetEntryLabel());
86    arm_codegen->InvokeRuntime(
87        QUICK_ENTRY_POINT(pThrowNullPointer), instruction_, instruction_->GetDexPc());
88  }
89
90 private:
91  HNullCheck* const instruction_;
92  DISALLOW_COPY_AND_ASSIGN(NullCheckSlowPathARM);
93};
94
95class DivZeroCheckSlowPathARM : public SlowPathCodeARM {
96 public:
97  explicit DivZeroCheckSlowPathARM(HDivZeroCheck* instruction) : instruction_(instruction) {}
98
99  virtual void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
100    CodeGeneratorARM* arm_codegen = down_cast<CodeGeneratorARM*>(codegen);
101    __ Bind(GetEntryLabel());
102    arm_codegen->InvokeRuntime(
103        QUICK_ENTRY_POINT(pThrowDivZero), instruction_, instruction_->GetDexPc());
104  }
105
106 private:
107  HDivZeroCheck* const instruction_;
108  DISALLOW_COPY_AND_ASSIGN(DivZeroCheckSlowPathARM);
109};
110
111class StackOverflowCheckSlowPathARM : public SlowPathCodeARM {
112 public:
113  StackOverflowCheckSlowPathARM() {}
114
115  virtual void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
116    __ Bind(GetEntryLabel());
117    __ LoadFromOffset(kLoadWord, PC, TR,
118        QUICK_ENTRYPOINT_OFFSET(kArmWordSize, pThrowStackOverflow).Int32Value());
119  }
120
121 private:
122  DISALLOW_COPY_AND_ASSIGN(StackOverflowCheckSlowPathARM);
123};
124
125class SuspendCheckSlowPathARM : public SlowPathCodeARM {
126 public:
127  explicit SuspendCheckSlowPathARM(HSuspendCheck* instruction, HBasicBlock* successor)
128      : instruction_(instruction), successor_(successor) {}
129
130  virtual void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
131    CodeGeneratorARM* arm_codegen = down_cast<CodeGeneratorARM*>(codegen);
132    __ Bind(GetEntryLabel());
133    codegen->SaveLiveRegisters(instruction_->GetLocations());
134    arm_codegen->InvokeRuntime(
135        QUICK_ENTRY_POINT(pTestSuspend), instruction_, instruction_->GetDexPc());
136    codegen->RestoreLiveRegisters(instruction_->GetLocations());
137    if (successor_ == nullptr) {
138      __ b(GetReturnLabel());
139    } else {
140      __ b(arm_codegen->GetLabelOf(successor_));
141    }
142  }
143
144  Label* GetReturnLabel() {
145    DCHECK(successor_ == nullptr);
146    return &return_label_;
147  }
148
149 private:
150  HSuspendCheck* const instruction_;
151  // If not null, the block to branch to after the suspend check.
152  HBasicBlock* const successor_;
153
154  // If `successor_` is null, the label to branch to after the suspend check.
155  Label return_label_;
156
157  DISALLOW_COPY_AND_ASSIGN(SuspendCheckSlowPathARM);
158};
159
160class BoundsCheckSlowPathARM : public SlowPathCodeARM {
161 public:
162  BoundsCheckSlowPathARM(HBoundsCheck* instruction,
163                         Location index_location,
164                         Location length_location)
165      : instruction_(instruction),
166        index_location_(index_location),
167        length_location_(length_location) {}
168
169  virtual void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
170    CodeGeneratorARM* arm_codegen = down_cast<CodeGeneratorARM*>(codegen);
171    __ Bind(GetEntryLabel());
172    // We're moving two locations to locations that could overlap, so we need a parallel
173    // move resolver.
174    InvokeRuntimeCallingConvention calling_convention;
175    codegen->EmitParallelMoves(
176        index_location_,
177        Location::RegisterLocation(calling_convention.GetRegisterAt(0)),
178        length_location_,
179        Location::RegisterLocation(calling_convention.GetRegisterAt(1)));
180    arm_codegen->InvokeRuntime(
181        QUICK_ENTRY_POINT(pThrowArrayBounds), instruction_, instruction_->GetDexPc());
182  }
183
184 private:
185  HBoundsCheck* const instruction_;
186  const Location index_location_;
187  const Location length_location_;
188
189  DISALLOW_COPY_AND_ASSIGN(BoundsCheckSlowPathARM);
190};
191
192class LoadClassSlowPathARM : public SlowPathCodeARM {
193 public:
194  LoadClassSlowPathARM(HLoadClass* cls,
195                       HInstruction* at,
196                       uint32_t dex_pc,
197                       bool do_clinit)
198      : cls_(cls), at_(at), dex_pc_(dex_pc), do_clinit_(do_clinit) {
199    DCHECK(at->IsLoadClass() || at->IsClinitCheck());
200  }
201
202  virtual void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
203    LocationSummary* locations = at_->GetLocations();
204
205    CodeGeneratorARM* arm_codegen = down_cast<CodeGeneratorARM*>(codegen);
206    __ Bind(GetEntryLabel());
207    codegen->SaveLiveRegisters(locations);
208
209    InvokeRuntimeCallingConvention calling_convention;
210    __ LoadImmediate(calling_convention.GetRegisterAt(0), cls_->GetTypeIndex());
211    arm_codegen->LoadCurrentMethod(calling_convention.GetRegisterAt(1));
212    int32_t entry_point_offset = do_clinit_
213        ? QUICK_ENTRY_POINT(pInitializeStaticStorage)
214        : QUICK_ENTRY_POINT(pInitializeType);
215    arm_codegen->InvokeRuntime(entry_point_offset, at_, dex_pc_);
216
217    // Move the class to the desired location.
218    Location out = locations->Out();
219    if (out.IsValid()) {
220      DCHECK(out.IsRegister() && !locations->GetLiveRegisters()->ContainsCoreRegister(out.reg()));
221      arm_codegen->Move32(locations->Out(), Location::RegisterLocation(R0));
222    }
223    codegen->RestoreLiveRegisters(locations);
224    __ b(GetExitLabel());
225  }
226
227 private:
228  // The class this slow path will load.
229  HLoadClass* const cls_;
230
231  // The instruction where this slow path is happening.
232  // (Might be the load class or an initialization check).
233  HInstruction* const at_;
234
235  // The dex PC of `at_`.
236  const uint32_t dex_pc_;
237
238  // Whether to initialize the class.
239  const bool do_clinit_;
240
241  DISALLOW_COPY_AND_ASSIGN(LoadClassSlowPathARM);
242};
243
244class LoadStringSlowPathARM : public SlowPathCodeARM {
245 public:
246  explicit LoadStringSlowPathARM(HLoadString* instruction) : instruction_(instruction) {}
247
248  virtual void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
249    LocationSummary* locations = instruction_->GetLocations();
250    DCHECK(!locations->GetLiveRegisters()->ContainsCoreRegister(locations->Out().reg()));
251
252    CodeGeneratorARM* arm_codegen = down_cast<CodeGeneratorARM*>(codegen);
253    __ Bind(GetEntryLabel());
254    codegen->SaveLiveRegisters(locations);
255
256    InvokeRuntimeCallingConvention calling_convention;
257    arm_codegen->LoadCurrentMethod(calling_convention.GetRegisterAt(0));
258    __ LoadImmediate(calling_convention.GetRegisterAt(1), instruction_->GetStringIndex());
259    arm_codegen->InvokeRuntime(
260        QUICK_ENTRY_POINT(pResolveString), instruction_, instruction_->GetDexPc());
261    arm_codegen->Move32(locations->Out(), Location::RegisterLocation(R0));
262
263    codegen->RestoreLiveRegisters(locations);
264    __ b(GetExitLabel());
265  }
266
267 private:
268  HLoadString* const instruction_;
269
270  DISALLOW_COPY_AND_ASSIGN(LoadStringSlowPathARM);
271};
272
273class TypeCheckSlowPathARM : public SlowPathCodeARM {
274 public:
275  TypeCheckSlowPathARM(HInstruction* instruction,
276                       Location class_to_check,
277                       Location object_class,
278                       uint32_t dex_pc)
279      : instruction_(instruction),
280        class_to_check_(class_to_check),
281        object_class_(object_class),
282        dex_pc_(dex_pc) {}
283
284  virtual void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
285    LocationSummary* locations = instruction_->GetLocations();
286    DCHECK(instruction_->IsCheckCast()
287           || !locations->GetLiveRegisters()->ContainsCoreRegister(locations->Out().reg()));
288
289    CodeGeneratorARM* arm_codegen = down_cast<CodeGeneratorARM*>(codegen);
290    __ Bind(GetEntryLabel());
291    codegen->SaveLiveRegisters(locations);
292
293    // We're moving two locations to locations that could overlap, so we need a parallel
294    // move resolver.
295    InvokeRuntimeCallingConvention calling_convention;
296    codegen->EmitParallelMoves(
297        class_to_check_,
298        Location::RegisterLocation(calling_convention.GetRegisterAt(0)),
299        object_class_,
300        Location::RegisterLocation(calling_convention.GetRegisterAt(1)));
301
302    if (instruction_->IsInstanceOf()) {
303      arm_codegen->InvokeRuntime(QUICK_ENTRY_POINT(pInstanceofNonTrivial), instruction_, dex_pc_);
304      arm_codegen->Move32(locations->Out(), Location::RegisterLocation(R0));
305    } else {
306      DCHECK(instruction_->IsCheckCast());
307      arm_codegen->InvokeRuntime(QUICK_ENTRY_POINT(pCheckCast), instruction_, dex_pc_);
308    }
309
310    codegen->RestoreLiveRegisters(locations);
311    __ b(GetExitLabel());
312  }
313
314 private:
315  HInstruction* const instruction_;
316  const Location class_to_check_;
317  const Location object_class_;
318  uint32_t dex_pc_;
319
320  DISALLOW_COPY_AND_ASSIGN(TypeCheckSlowPathARM);
321};
322
323#undef __
324
325#undef __
326#define __ reinterpret_cast<ArmAssembler*>(GetAssembler())->
327
328inline Condition ARMCondition(IfCondition cond) {
329  switch (cond) {
330    case kCondEQ: return EQ;
331    case kCondNE: return NE;
332    case kCondLT: return LT;
333    case kCondLE: return LE;
334    case kCondGT: return GT;
335    case kCondGE: return GE;
336    default:
337      LOG(FATAL) << "Unknown if condition";
338  }
339  return EQ;        // Unreachable.
340}
341
342inline Condition ARMOppositeCondition(IfCondition cond) {
343  switch (cond) {
344    case kCondEQ: return NE;
345    case kCondNE: return EQ;
346    case kCondLT: return GE;
347    case kCondLE: return GT;
348    case kCondGT: return LE;
349    case kCondGE: return LT;
350    default:
351      LOG(FATAL) << "Unknown if condition";
352  }
353  return EQ;        // Unreachable.
354}
355
356void CodeGeneratorARM::DumpCoreRegister(std::ostream& stream, int reg) const {
357  stream << ArmManagedRegister::FromCoreRegister(Register(reg));
358}
359
360void CodeGeneratorARM::DumpFloatingPointRegister(std::ostream& stream, int reg) const {
361  stream << ArmManagedRegister::FromSRegister(SRegister(reg));
362}
363
364size_t CodeGeneratorARM::SaveCoreRegister(size_t stack_index, uint32_t reg_id) {
365  __ StoreToOffset(kStoreWord, static_cast<Register>(reg_id), SP, stack_index);
366  return kArmWordSize;
367}
368
369size_t CodeGeneratorARM::RestoreCoreRegister(size_t stack_index, uint32_t reg_id) {
370  __ LoadFromOffset(kLoadWord, static_cast<Register>(reg_id), SP, stack_index);
371  return kArmWordSize;
372}
373
374CodeGeneratorARM::CodeGeneratorARM(HGraph* graph)
375    : CodeGenerator(graph, kNumberOfCoreRegisters, kNumberOfSRegisters, kNumberOfRegisterPairs),
376      block_labels_(graph->GetArena(), 0),
377      location_builder_(graph, this),
378      instruction_visitor_(graph, this),
379      move_resolver_(graph->GetArena(), this),
380      assembler_(true) {}
381
382size_t CodeGeneratorARM::FrameEntrySpillSize() const {
383  return kNumberOfPushedRegistersAtEntry * kArmWordSize;
384}
385
386Location CodeGeneratorARM::AllocateFreeRegister(Primitive::Type type) const {
387  switch (type) {
388    case Primitive::kPrimLong: {
389      size_t reg = FindFreeEntry(blocked_register_pairs_, kNumberOfRegisterPairs);
390      ArmManagedRegister pair =
391          ArmManagedRegister::FromRegisterPair(static_cast<RegisterPair>(reg));
392      DCHECK(!blocked_core_registers_[pair.AsRegisterPairLow()]);
393      DCHECK(!blocked_core_registers_[pair.AsRegisterPairHigh()]);
394
395      blocked_core_registers_[pair.AsRegisterPairLow()] = true;
396      blocked_core_registers_[pair.AsRegisterPairHigh()] = true;
397      UpdateBlockedPairRegisters();
398      return Location::RegisterPairLocation(pair.AsRegisterPairLow(), pair.AsRegisterPairHigh());
399    }
400
401    case Primitive::kPrimByte:
402    case Primitive::kPrimBoolean:
403    case Primitive::kPrimChar:
404    case Primitive::kPrimShort:
405    case Primitive::kPrimInt:
406    case Primitive::kPrimNot: {
407      int reg = FindFreeEntry(blocked_core_registers_, kNumberOfCoreRegisters);
408      // Block all register pairs that contain `reg`.
409      for (int i = 0; i < kNumberOfRegisterPairs; i++) {
410        ArmManagedRegister current =
411            ArmManagedRegister::FromRegisterPair(static_cast<RegisterPair>(i));
412        if (current.AsRegisterPairLow() == reg || current.AsRegisterPairHigh() == reg) {
413          blocked_register_pairs_[i] = true;
414        }
415      }
416      return Location::RegisterLocation(reg);
417    }
418
419    case Primitive::kPrimFloat: {
420      int reg = FindFreeEntry(blocked_fpu_registers_, kNumberOfSRegisters);
421      return Location::FpuRegisterLocation(reg);
422    }
423
424    case Primitive::kPrimDouble: {
425      int reg = FindTwoFreeConsecutiveAlignedEntries(blocked_fpu_registers_, kNumberOfSRegisters);
426      DCHECK_EQ(reg % 2, 0);
427      return Location::FpuRegisterPairLocation(reg, reg + 1);
428    }
429
430    case Primitive::kPrimVoid:
431      LOG(FATAL) << "Unreachable type " << type;
432  }
433
434  return Location();
435}
436
437void CodeGeneratorARM::SetupBlockedRegisters() const {
438  // Don't allocate the dalvik style register pair passing.
439  blocked_register_pairs_[R1_R2] = true;
440
441  // Stack register, LR and PC are always reserved.
442  blocked_core_registers_[SP] = true;
443  blocked_core_registers_[LR] = true;
444  blocked_core_registers_[PC] = true;
445
446  // Reserve thread register.
447  blocked_core_registers_[TR] = true;
448
449  // Reserve temp register.
450  blocked_core_registers_[IP] = true;
451
452  // TODO: We currently don't use Quick's callee saved registers.
453  // We always save and restore R6 and R7 to make sure we can use three
454  // register pairs for long operations.
455  blocked_core_registers_[R4] = true;
456  blocked_core_registers_[R5] = true;
457  blocked_core_registers_[R8] = true;
458  blocked_core_registers_[R10] = true;
459  blocked_core_registers_[R11] = true;
460
461  blocked_fpu_registers_[S16] = true;
462  blocked_fpu_registers_[S17] = true;
463  blocked_fpu_registers_[S18] = true;
464  blocked_fpu_registers_[S19] = true;
465  blocked_fpu_registers_[S20] = true;
466  blocked_fpu_registers_[S21] = true;
467  blocked_fpu_registers_[S22] = true;
468  blocked_fpu_registers_[S23] = true;
469  blocked_fpu_registers_[S24] = true;
470  blocked_fpu_registers_[S25] = true;
471  blocked_fpu_registers_[S26] = true;
472  blocked_fpu_registers_[S27] = true;
473  blocked_fpu_registers_[S28] = true;
474  blocked_fpu_registers_[S29] = true;
475  blocked_fpu_registers_[S30] = true;
476  blocked_fpu_registers_[S31] = true;
477
478  UpdateBlockedPairRegisters();
479}
480
481void CodeGeneratorARM::UpdateBlockedPairRegisters() const {
482  for (int i = 0; i < kNumberOfRegisterPairs; i++) {
483    ArmManagedRegister current =
484        ArmManagedRegister::FromRegisterPair(static_cast<RegisterPair>(i));
485    if (blocked_core_registers_[current.AsRegisterPairLow()]
486        || blocked_core_registers_[current.AsRegisterPairHigh()]) {
487      blocked_register_pairs_[i] = true;
488    }
489  }
490}
491
492InstructionCodeGeneratorARM::InstructionCodeGeneratorARM(HGraph* graph, CodeGeneratorARM* codegen)
493      : HGraphVisitor(graph),
494        assembler_(codegen->GetAssembler()),
495        codegen_(codegen) {}
496
497void CodeGeneratorARM::GenerateFrameEntry() {
498  bool skip_overflow_check = IsLeafMethod() && !FrameNeedsStackCheck(GetFrameSize(), InstructionSet::kArm);
499  if (!skip_overflow_check) {
500    if (kExplicitStackOverflowCheck) {
501      SlowPathCodeARM* slow_path = new (GetGraph()->GetArena()) StackOverflowCheckSlowPathARM();
502      AddSlowPath(slow_path);
503
504      __ LoadFromOffset(kLoadWord, IP, TR, Thread::StackEndOffset<kArmWordSize>().Int32Value());
505      __ cmp(SP, ShifterOperand(IP));
506      __ b(slow_path->GetEntryLabel(), CC);
507    } else {
508      __ AddConstant(IP, SP, -static_cast<int32_t>(GetStackOverflowReservedBytes(kArm)));
509      __ LoadFromOffset(kLoadWord, IP, IP, 0);
510      RecordPcInfo(nullptr, 0);
511    }
512  }
513
514  core_spill_mask_ |= (1 << LR | 1 << R6 | 1 << R7);
515  __ PushList(1 << LR | 1 << R6 | 1 << R7);
516
517  // The return PC has already been pushed on the stack.
518  __ AddConstant(SP, -(GetFrameSize() - kNumberOfPushedRegistersAtEntry * kArmWordSize));
519  __ StoreToOffset(kStoreWord, R0, SP, 0);
520}
521
522void CodeGeneratorARM::GenerateFrameExit() {
523  __ AddConstant(SP, GetFrameSize() - kNumberOfPushedRegistersAtEntry * kArmWordSize);
524  __ PopList(1 << PC | 1 << R6 | 1 << R7);
525}
526
527void CodeGeneratorARM::Bind(HBasicBlock* block) {
528  __ Bind(GetLabelOf(block));
529}
530
531Location CodeGeneratorARM::GetStackLocation(HLoadLocal* load) const {
532  switch (load->GetType()) {
533    case Primitive::kPrimLong:
534    case Primitive::kPrimDouble:
535      return Location::DoubleStackSlot(GetStackSlot(load->GetLocal()));
536      break;
537
538    case Primitive::kPrimInt:
539    case Primitive::kPrimNot:
540    case Primitive::kPrimFloat:
541      return Location::StackSlot(GetStackSlot(load->GetLocal()));
542
543    case Primitive::kPrimBoolean:
544    case Primitive::kPrimByte:
545    case Primitive::kPrimChar:
546    case Primitive::kPrimShort:
547    case Primitive::kPrimVoid:
548      LOG(FATAL) << "Unexpected type " << load->GetType();
549  }
550
551  LOG(FATAL) << "Unreachable";
552  return Location();
553}
554
555Location InvokeDexCallingConventionVisitor::GetNextLocation(Primitive::Type type) {
556  switch (type) {
557    case Primitive::kPrimBoolean:
558    case Primitive::kPrimByte:
559    case Primitive::kPrimChar:
560    case Primitive::kPrimShort:
561    case Primitive::kPrimInt:
562    case Primitive::kPrimNot: {
563      uint32_t index = gp_index_++;
564      uint32_t stack_index = stack_index_++;
565      if (index < calling_convention.GetNumberOfRegisters()) {
566        return Location::RegisterLocation(calling_convention.GetRegisterAt(index));
567      } else {
568        return Location::StackSlot(calling_convention.GetStackOffsetOf(stack_index));
569      }
570    }
571
572    case Primitive::kPrimLong: {
573      uint32_t index = gp_index_;
574      uint32_t stack_index = stack_index_;
575      gp_index_ += 2;
576      stack_index_ += 2;
577      if (index + 1 < calling_convention.GetNumberOfRegisters()) {
578        ArmManagedRegister pair = ArmManagedRegister::FromRegisterPair(
579            calling_convention.GetRegisterPairAt(index));
580        return Location::RegisterPairLocation(pair.AsRegisterPairLow(), pair.AsRegisterPairHigh());
581      } else if (index + 1 == calling_convention.GetNumberOfRegisters()) {
582        return Location::QuickParameter(index, stack_index);
583      } else {
584        return Location::DoubleStackSlot(calling_convention.GetStackOffsetOf(stack_index));
585      }
586    }
587
588    case Primitive::kPrimFloat: {
589      uint32_t stack_index = stack_index_++;
590      if (float_index_ % 2 == 0) {
591        float_index_ = std::max(double_index_, float_index_);
592      }
593      if (float_index_ < calling_convention.GetNumberOfFpuRegisters()) {
594        return Location::FpuRegisterLocation(calling_convention.GetFpuRegisterAt(float_index_++));
595      } else {
596        return Location::StackSlot(calling_convention.GetStackOffsetOf(stack_index));
597      }
598    }
599
600    case Primitive::kPrimDouble: {
601      double_index_ = std::max(double_index_, RoundUp(float_index_, 2));
602      uint32_t stack_index = stack_index_;
603      stack_index_ += 2;
604      if (double_index_ + 1 < calling_convention.GetNumberOfFpuRegisters()) {
605        uint32_t index = double_index_;
606        double_index_ += 2;
607        return Location::FpuRegisterPairLocation(
608          calling_convention.GetFpuRegisterAt(index),
609          calling_convention.GetFpuRegisterAt(index + 1));
610      } else {
611        return Location::DoubleStackSlot(calling_convention.GetStackOffsetOf(stack_index));
612      }
613    }
614
615    case Primitive::kPrimVoid:
616      LOG(FATAL) << "Unexpected parameter type " << type;
617      break;
618  }
619  return Location();
620}
621
622Location InvokeDexCallingConventionVisitor::GetReturnLocation(Primitive::Type type) {
623  switch (type) {
624    case Primitive::kPrimBoolean:
625    case Primitive::kPrimByte:
626    case Primitive::kPrimChar:
627    case Primitive::kPrimShort:
628    case Primitive::kPrimInt:
629    case Primitive::kPrimNot: {
630      return Location::RegisterLocation(R0);
631    }
632
633    case Primitive::kPrimFloat: {
634      return Location::FpuRegisterLocation(S0);
635    }
636
637    case Primitive::kPrimLong: {
638      return Location::RegisterPairLocation(R0, R1);
639    }
640
641    case Primitive::kPrimDouble: {
642      return Location::FpuRegisterPairLocation(S0, S1);
643    }
644
645    case Primitive::kPrimVoid:
646      return Location();
647  }
648  UNREACHABLE();
649  return Location();
650}
651
652void CodeGeneratorARM::Move32(Location destination, Location source) {
653  if (source.Equals(destination)) {
654    return;
655  }
656  if (destination.IsRegister()) {
657    if (source.IsRegister()) {
658      __ Mov(destination.As<Register>(), source.As<Register>());
659    } else if (source.IsFpuRegister()) {
660      __ vmovrs(destination.As<Register>(), source.As<SRegister>());
661    } else {
662      __ LoadFromOffset(kLoadWord, destination.As<Register>(), SP, source.GetStackIndex());
663    }
664  } else if (destination.IsFpuRegister()) {
665    if (source.IsRegister()) {
666      __ vmovsr(destination.As<SRegister>(), source.As<Register>());
667    } else if (source.IsFpuRegister()) {
668      __ vmovs(destination.As<SRegister>(), source.As<SRegister>());
669    } else {
670      __ LoadSFromOffset(destination.As<SRegister>(), SP, source.GetStackIndex());
671    }
672  } else {
673    DCHECK(destination.IsStackSlot()) << destination;
674    if (source.IsRegister()) {
675      __ StoreToOffset(kStoreWord, source.As<Register>(), SP, destination.GetStackIndex());
676    } else if (source.IsFpuRegister()) {
677      __ StoreSToOffset(source.As<SRegister>(), SP, destination.GetStackIndex());
678    } else {
679      DCHECK(source.IsStackSlot()) << source;
680      __ LoadFromOffset(kLoadWord, IP, SP, source.GetStackIndex());
681      __ StoreToOffset(kStoreWord, IP, SP, destination.GetStackIndex());
682    }
683  }
684}
685
686void CodeGeneratorARM::Move64(Location destination, Location source) {
687  if (source.Equals(destination)) {
688    return;
689  }
690  if (destination.IsRegisterPair()) {
691    if (source.IsRegisterPair()) {
692      __ Mov(destination.AsRegisterPairLow<Register>(), source.AsRegisterPairLow<Register>());
693      __ Mov(destination.AsRegisterPairHigh<Register>(), source.AsRegisterPairHigh<Register>());
694    } else if (source.IsFpuRegister()) {
695      UNIMPLEMENTED(FATAL);
696    } else if (source.IsQuickParameter()) {
697      uint16_t register_index = source.GetQuickParameterRegisterIndex();
698      uint16_t stack_index = source.GetQuickParameterStackIndex();
699      InvokeDexCallingConvention calling_convention;
700      __ Mov(destination.AsRegisterPairLow<Register>(),
701             calling_convention.GetRegisterAt(register_index));
702      __ LoadFromOffset(kLoadWord, destination.AsRegisterPairHigh<Register>(),
703             SP, calling_convention.GetStackOffsetOf(stack_index + 1) + GetFrameSize());
704    } else {
705      DCHECK(source.IsDoubleStackSlot());
706      if (destination.AsRegisterPairLow<Register>() == R1) {
707        DCHECK_EQ(destination.AsRegisterPairHigh<Register>(), R2);
708        __ LoadFromOffset(kLoadWord, R1, SP, source.GetStackIndex());
709        __ LoadFromOffset(kLoadWord, R2, SP, source.GetHighStackIndex(kArmWordSize));
710      } else {
711        __ LoadFromOffset(kLoadWordPair, destination.AsRegisterPairLow<Register>(),
712                          SP, source.GetStackIndex());
713      }
714    }
715  } else if (destination.IsFpuRegisterPair()) {
716    if (source.IsDoubleStackSlot()) {
717      __ LoadDFromOffset(FromLowSToD(destination.AsFpuRegisterPairLow<SRegister>()),
718                         SP,
719                         source.GetStackIndex());
720    } else {
721      UNIMPLEMENTED(FATAL);
722    }
723  } else if (destination.IsQuickParameter()) {
724    InvokeDexCallingConvention calling_convention;
725    uint16_t register_index = destination.GetQuickParameterRegisterIndex();
726    uint16_t stack_index = destination.GetQuickParameterStackIndex();
727    if (source.IsRegisterPair()) {
728      __ Mov(calling_convention.GetRegisterAt(register_index),
729             source.AsRegisterPairLow<Register>());
730      __ StoreToOffset(kStoreWord, source.AsRegisterPairHigh<Register>(),
731             SP, calling_convention.GetStackOffsetOf(stack_index + 1));
732    } else if (source.IsFpuRegister()) {
733      UNIMPLEMENTED(FATAL);
734    } else {
735      DCHECK(source.IsDoubleStackSlot());
736      __ LoadFromOffset(
737          kLoadWord, calling_convention.GetRegisterAt(register_index), SP, source.GetStackIndex());
738      __ LoadFromOffset(kLoadWord, R0, SP, source.GetHighStackIndex(kArmWordSize));
739      __ StoreToOffset(kStoreWord, R0, SP, calling_convention.GetStackOffsetOf(stack_index + 1));
740    }
741  } else {
742    DCHECK(destination.IsDoubleStackSlot());
743    if (source.IsRegisterPair()) {
744      if (source.AsRegisterPairLow<Register>() == R1) {
745        DCHECK_EQ(source.AsRegisterPairHigh<Register>(), R2);
746        __ StoreToOffset(kStoreWord, R1, SP, destination.GetStackIndex());
747        __ StoreToOffset(kStoreWord, R2, SP, destination.GetHighStackIndex(kArmWordSize));
748      } else {
749        __ StoreToOffset(kStoreWordPair, source.AsRegisterPairLow<Register>(),
750                         SP, destination.GetStackIndex());
751      }
752    } else if (source.IsQuickParameter()) {
753      InvokeDexCallingConvention calling_convention;
754      uint16_t register_index = source.GetQuickParameterRegisterIndex();
755      uint16_t stack_index = source.GetQuickParameterStackIndex();
756      __ StoreToOffset(kStoreWord, calling_convention.GetRegisterAt(register_index),
757             SP, destination.GetStackIndex());
758      __ LoadFromOffset(kLoadWord, R0,
759             SP, calling_convention.GetStackOffsetOf(stack_index + 1) + GetFrameSize());
760      __ StoreToOffset(kStoreWord, R0, SP, destination.GetHighStackIndex(kArmWordSize));
761    } else if (source.IsFpuRegisterPair()) {
762      __ StoreDToOffset(FromLowSToD(source.AsFpuRegisterPairLow<SRegister>()),
763                        SP,
764                        destination.GetStackIndex());
765    } else {
766      DCHECK(source.IsDoubleStackSlot());
767      __ LoadFromOffset(kLoadWord, IP, SP, source.GetStackIndex());
768      __ StoreToOffset(kStoreWord, IP, SP, destination.GetStackIndex());
769      __ LoadFromOffset(kLoadWord, IP, SP, source.GetHighStackIndex(kArmWordSize));
770      __ StoreToOffset(kStoreWord, IP, SP, destination.GetHighStackIndex(kArmWordSize));
771    }
772  }
773}
774
775void CodeGeneratorARM::Move(HInstruction* instruction, Location location, HInstruction* move_for) {
776  LocationSummary* locations = instruction->GetLocations();
777  if (locations != nullptr && locations->Out().Equals(location)) {
778    return;
779  }
780
781  if (locations != nullptr && locations->Out().IsConstant()) {
782    HConstant* const_to_move = locations->Out().GetConstant();
783    if (const_to_move->IsIntConstant()) {
784      int32_t value = const_to_move->AsIntConstant()->GetValue();
785      if (location.IsRegister()) {
786        __ LoadImmediate(location.As<Register>(), value);
787      } else {
788        DCHECK(location.IsStackSlot());
789        __ LoadImmediate(IP, value);
790        __ StoreToOffset(kStoreWord, IP, SP, location.GetStackIndex());
791      }
792    } else if (const_to_move->IsLongConstant()) {
793      int64_t value = const_to_move->AsLongConstant()->GetValue();
794      if (location.IsRegisterPair()) {
795        __ LoadImmediate(location.AsRegisterPairLow<Register>(), Low32Bits(value));
796        __ LoadImmediate(location.AsRegisterPairHigh<Register>(), High32Bits(value));
797      } else {
798        DCHECK(location.IsDoubleStackSlot());
799        __ LoadImmediate(IP, Low32Bits(value));
800        __ StoreToOffset(kStoreWord, IP, SP, location.GetStackIndex());
801        __ LoadImmediate(IP, High32Bits(value));
802        __ StoreToOffset(kStoreWord, IP, SP, location.GetHighStackIndex(kArmWordSize));
803      }
804    }
805  } else if (instruction->IsLoadLocal()) {
806    uint32_t stack_slot = GetStackSlot(instruction->AsLoadLocal()->GetLocal());
807    switch (instruction->GetType()) {
808      case Primitive::kPrimBoolean:
809      case Primitive::kPrimByte:
810      case Primitive::kPrimChar:
811      case Primitive::kPrimShort:
812      case Primitive::kPrimInt:
813      case Primitive::kPrimNot:
814      case Primitive::kPrimFloat:
815        Move32(location, Location::StackSlot(stack_slot));
816        break;
817
818      case Primitive::kPrimLong:
819      case Primitive::kPrimDouble:
820        Move64(location, Location::DoubleStackSlot(stack_slot));
821        break;
822
823      default:
824        LOG(FATAL) << "Unexpected type " << instruction->GetType();
825    }
826  } else if (instruction->IsTemporary()) {
827    Location temp_location = GetTemporaryLocation(instruction->AsTemporary());
828    if (temp_location.IsStackSlot()) {
829      Move32(location, temp_location);
830    } else {
831      DCHECK(temp_location.IsDoubleStackSlot());
832      Move64(location, temp_location);
833    }
834  } else {
835    DCHECK((instruction->GetNext() == move_for) || instruction->GetNext()->IsTemporary());
836    switch (instruction->GetType()) {
837      case Primitive::kPrimBoolean:
838      case Primitive::kPrimByte:
839      case Primitive::kPrimChar:
840      case Primitive::kPrimShort:
841      case Primitive::kPrimNot:
842      case Primitive::kPrimInt:
843      case Primitive::kPrimFloat:
844        Move32(location, locations->Out());
845        break;
846
847      case Primitive::kPrimLong:
848      case Primitive::kPrimDouble:
849        Move64(location, locations->Out());
850        break;
851
852      default:
853        LOG(FATAL) << "Unexpected type " << instruction->GetType();
854    }
855  }
856}
857
858void CodeGeneratorARM::InvokeRuntime(int32_t entry_point_offset,
859                                     HInstruction* instruction,
860                                     uint32_t dex_pc) {
861  __ LoadFromOffset(kLoadWord, LR, TR, entry_point_offset);
862  __ blx(LR);
863  RecordPcInfo(instruction, dex_pc);
864  DCHECK(instruction->IsSuspendCheck()
865      || instruction->IsBoundsCheck()
866      || instruction->IsNullCheck()
867      || instruction->IsDivZeroCheck()
868      || !IsLeafMethod());
869}
870
871void LocationsBuilderARM::VisitGoto(HGoto* got) {
872  got->SetLocations(nullptr);
873}
874
875void InstructionCodeGeneratorARM::VisitGoto(HGoto* got) {
876  HBasicBlock* successor = got->GetSuccessor();
877  DCHECK(!successor->IsExitBlock());
878
879  HBasicBlock* block = got->GetBlock();
880  HInstruction* previous = got->GetPrevious();
881
882  HLoopInformation* info = block->GetLoopInformation();
883  if (info != nullptr && info->IsBackEdge(block) && info->HasSuspendCheck()) {
884    codegen_->ClearSpillSlotsFromLoopPhisInStackMap(info->GetSuspendCheck());
885    GenerateSuspendCheck(info->GetSuspendCheck(), successor);
886    return;
887  }
888
889  if (block->IsEntryBlock() && (previous != nullptr) && previous->IsSuspendCheck()) {
890    GenerateSuspendCheck(previous->AsSuspendCheck(), nullptr);
891  }
892  if (!codegen_->GoesToNextBlock(got->GetBlock(), successor)) {
893    __ b(codegen_->GetLabelOf(successor));
894  }
895}
896
897void LocationsBuilderARM::VisitExit(HExit* exit) {
898  exit->SetLocations(nullptr);
899}
900
901void InstructionCodeGeneratorARM::VisitExit(HExit* exit) {
902  UNUSED(exit);
903  if (kIsDebugBuild) {
904    __ Comment("Unreachable");
905    __ bkpt(0);
906  }
907}
908
909void LocationsBuilderARM::VisitIf(HIf* if_instr) {
910  LocationSummary* locations =
911      new (GetGraph()->GetArena()) LocationSummary(if_instr, LocationSummary::kNoCall);
912  HInstruction* cond = if_instr->InputAt(0);
913  if (!cond->IsCondition() || cond->AsCondition()->NeedsMaterialization()) {
914    locations->SetInAt(0, Location::RequiresRegister());
915  }
916}
917
918void InstructionCodeGeneratorARM::VisitIf(HIf* if_instr) {
919  HInstruction* cond = if_instr->InputAt(0);
920  if (cond->IsIntConstant()) {
921    // Constant condition, statically compared against 1.
922    int32_t cond_value = cond->AsIntConstant()->GetValue();
923    if (cond_value == 1) {
924      if (!codegen_->GoesToNextBlock(if_instr->GetBlock(),
925                                     if_instr->IfTrueSuccessor())) {
926        __ b(codegen_->GetLabelOf(if_instr->IfTrueSuccessor()));
927      }
928      return;
929    } else {
930      DCHECK_EQ(cond_value, 0);
931    }
932  } else {
933    if (!cond->IsCondition() || cond->AsCondition()->NeedsMaterialization()) {
934      // Condition has been materialized, compare the output to 0
935      DCHECK(if_instr->GetLocations()->InAt(0).IsRegister());
936      __ cmp(if_instr->GetLocations()->InAt(0).As<Register>(),
937             ShifterOperand(0));
938      __ b(codegen_->GetLabelOf(if_instr->IfTrueSuccessor()), NE);
939    } else {
940      // Condition has not been materialized, use its inputs as the
941      // comparison and its condition as the branch condition.
942      LocationSummary* locations = cond->GetLocations();
943      if (locations->InAt(1).IsRegister()) {
944        __ cmp(locations->InAt(0).As<Register>(),
945               ShifterOperand(locations->InAt(1).As<Register>()));
946      } else {
947        DCHECK(locations->InAt(1).IsConstant());
948        int32_t value =
949            locations->InAt(1).GetConstant()->AsIntConstant()->GetValue();
950        ShifterOperand operand;
951        if (ShifterOperand::CanHoldArm(value, &operand)) {
952          __ cmp(locations->InAt(0).As<Register>(), ShifterOperand(value));
953        } else {
954          Register temp = IP;
955          __ LoadImmediate(temp, value);
956          __ cmp(locations->InAt(0).As<Register>(), ShifterOperand(temp));
957        }
958      }
959      __ b(codegen_->GetLabelOf(if_instr->IfTrueSuccessor()),
960           ARMCondition(cond->AsCondition()->GetCondition()));
961    }
962  }
963  if (!codegen_->GoesToNextBlock(if_instr->GetBlock(),
964                                 if_instr->IfFalseSuccessor())) {
965    __ b(codegen_->GetLabelOf(if_instr->IfFalseSuccessor()));
966  }
967}
968
969
970void LocationsBuilderARM::VisitCondition(HCondition* comp) {
971  LocationSummary* locations =
972      new (GetGraph()->GetArena()) LocationSummary(comp, LocationSummary::kNoCall);
973  locations->SetInAt(0, Location::RequiresRegister());
974  locations->SetInAt(1, Location::RegisterOrConstant(comp->InputAt(1)));
975  if (comp->NeedsMaterialization()) {
976    locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
977  }
978}
979
980void InstructionCodeGeneratorARM::VisitCondition(HCondition* comp) {
981  if (!comp->NeedsMaterialization()) return;
982
983  LocationSummary* locations = comp->GetLocations();
984  if (locations->InAt(1).IsRegister()) {
985    __ cmp(locations->InAt(0).As<Register>(),
986           ShifterOperand(locations->InAt(1).As<Register>()));
987  } else {
988    DCHECK(locations->InAt(1).IsConstant());
989    int32_t value = locations->InAt(1).GetConstant()->AsIntConstant()->GetValue();
990    ShifterOperand operand;
991    if (ShifterOperand::CanHoldArm(value, &operand)) {
992      __ cmp(locations->InAt(0).As<Register>(), ShifterOperand(value));
993    } else {
994      Register temp = IP;
995      __ LoadImmediate(temp, value);
996      __ cmp(locations->InAt(0).As<Register>(), ShifterOperand(temp));
997    }
998  }
999  __ it(ARMCondition(comp->GetCondition()), kItElse);
1000  __ mov(locations->Out().As<Register>(), ShifterOperand(1),
1001         ARMCondition(comp->GetCondition()));
1002  __ mov(locations->Out().As<Register>(), ShifterOperand(0),
1003         ARMOppositeCondition(comp->GetCondition()));
1004}
1005
1006void LocationsBuilderARM::VisitEqual(HEqual* comp) {
1007  VisitCondition(comp);
1008}
1009
1010void InstructionCodeGeneratorARM::VisitEqual(HEqual* comp) {
1011  VisitCondition(comp);
1012}
1013
1014void LocationsBuilderARM::VisitNotEqual(HNotEqual* comp) {
1015  VisitCondition(comp);
1016}
1017
1018void InstructionCodeGeneratorARM::VisitNotEqual(HNotEqual* comp) {
1019  VisitCondition(comp);
1020}
1021
1022void LocationsBuilderARM::VisitLessThan(HLessThan* comp) {
1023  VisitCondition(comp);
1024}
1025
1026void InstructionCodeGeneratorARM::VisitLessThan(HLessThan* comp) {
1027  VisitCondition(comp);
1028}
1029
1030void LocationsBuilderARM::VisitLessThanOrEqual(HLessThanOrEqual* comp) {
1031  VisitCondition(comp);
1032}
1033
1034void InstructionCodeGeneratorARM::VisitLessThanOrEqual(HLessThanOrEqual* comp) {
1035  VisitCondition(comp);
1036}
1037
1038void LocationsBuilderARM::VisitGreaterThan(HGreaterThan* comp) {
1039  VisitCondition(comp);
1040}
1041
1042void InstructionCodeGeneratorARM::VisitGreaterThan(HGreaterThan* comp) {
1043  VisitCondition(comp);
1044}
1045
1046void LocationsBuilderARM::VisitGreaterThanOrEqual(HGreaterThanOrEqual* comp) {
1047  VisitCondition(comp);
1048}
1049
1050void InstructionCodeGeneratorARM::VisitGreaterThanOrEqual(HGreaterThanOrEqual* comp) {
1051  VisitCondition(comp);
1052}
1053
1054void LocationsBuilderARM::VisitLocal(HLocal* local) {
1055  local->SetLocations(nullptr);
1056}
1057
1058void InstructionCodeGeneratorARM::VisitLocal(HLocal* local) {
1059  DCHECK_EQ(local->GetBlock(), GetGraph()->GetEntryBlock());
1060}
1061
1062void LocationsBuilderARM::VisitLoadLocal(HLoadLocal* load) {
1063  load->SetLocations(nullptr);
1064}
1065
1066void InstructionCodeGeneratorARM::VisitLoadLocal(HLoadLocal* load) {
1067  // Nothing to do, this is driven by the code generator.
1068  UNUSED(load);
1069}
1070
1071void LocationsBuilderARM::VisitStoreLocal(HStoreLocal* store) {
1072  LocationSummary* locations =
1073      new (GetGraph()->GetArena()) LocationSummary(store, LocationSummary::kNoCall);
1074  switch (store->InputAt(1)->GetType()) {
1075    case Primitive::kPrimBoolean:
1076    case Primitive::kPrimByte:
1077    case Primitive::kPrimChar:
1078    case Primitive::kPrimShort:
1079    case Primitive::kPrimInt:
1080    case Primitive::kPrimNot:
1081    case Primitive::kPrimFloat:
1082      locations->SetInAt(1, Location::StackSlot(codegen_->GetStackSlot(store->GetLocal())));
1083      break;
1084
1085    case Primitive::kPrimLong:
1086    case Primitive::kPrimDouble:
1087      locations->SetInAt(1, Location::DoubleStackSlot(codegen_->GetStackSlot(store->GetLocal())));
1088      break;
1089
1090    default:
1091      LOG(FATAL) << "Unexpected local type " << store->InputAt(1)->GetType();
1092  }
1093}
1094
1095void InstructionCodeGeneratorARM::VisitStoreLocal(HStoreLocal* store) {
1096  UNUSED(store);
1097}
1098
1099void LocationsBuilderARM::VisitIntConstant(HIntConstant* constant) {
1100  LocationSummary* locations =
1101      new (GetGraph()->GetArena()) LocationSummary(constant, LocationSummary::kNoCall);
1102  locations->SetOut(Location::ConstantLocation(constant));
1103}
1104
1105void InstructionCodeGeneratorARM::VisitIntConstant(HIntConstant* constant) {
1106  // Will be generated at use site.
1107  UNUSED(constant);
1108}
1109
1110void LocationsBuilderARM::VisitLongConstant(HLongConstant* constant) {
1111  LocationSummary* locations =
1112      new (GetGraph()->GetArena()) LocationSummary(constant, LocationSummary::kNoCall);
1113  locations->SetOut(Location::ConstantLocation(constant));
1114}
1115
1116void InstructionCodeGeneratorARM::VisitLongConstant(HLongConstant* constant) {
1117  // Will be generated at use site.
1118  UNUSED(constant);
1119}
1120
1121void LocationsBuilderARM::VisitFloatConstant(HFloatConstant* constant) {
1122  LocationSummary* locations =
1123      new (GetGraph()->GetArena()) LocationSummary(constant, LocationSummary::kNoCall);
1124  locations->SetOut(Location::ConstantLocation(constant));
1125}
1126
1127void InstructionCodeGeneratorARM::VisitFloatConstant(HFloatConstant* constant) {
1128  // Will be generated at use site.
1129  UNUSED(constant);
1130}
1131
1132void LocationsBuilderARM::VisitDoubleConstant(HDoubleConstant* constant) {
1133  LocationSummary* locations =
1134      new (GetGraph()->GetArena()) LocationSummary(constant, LocationSummary::kNoCall);
1135  locations->SetOut(Location::ConstantLocation(constant));
1136}
1137
1138void InstructionCodeGeneratorARM::VisitDoubleConstant(HDoubleConstant* constant) {
1139  // Will be generated at use site.
1140  UNUSED(constant);
1141}
1142
1143void LocationsBuilderARM::VisitReturnVoid(HReturnVoid* ret) {
1144  ret->SetLocations(nullptr);
1145}
1146
1147void InstructionCodeGeneratorARM::VisitReturnVoid(HReturnVoid* ret) {
1148  UNUSED(ret);
1149  codegen_->GenerateFrameExit();
1150}
1151
1152void LocationsBuilderARM::VisitReturn(HReturn* ret) {
1153  LocationSummary* locations =
1154      new (GetGraph()->GetArena()) LocationSummary(ret, LocationSummary::kNoCall);
1155  locations->SetInAt(0, parameter_visitor_.GetReturnLocation(ret->InputAt(0)->GetType()));
1156}
1157
1158void InstructionCodeGeneratorARM::VisitReturn(HReturn* ret) {
1159  UNUSED(ret);
1160  codegen_->GenerateFrameExit();
1161}
1162
1163void LocationsBuilderARM::VisitInvokeStatic(HInvokeStatic* invoke) {
1164  HandleInvoke(invoke);
1165}
1166
1167void CodeGeneratorARM::LoadCurrentMethod(Register reg) {
1168  __ LoadFromOffset(kLoadWord, reg, SP, kCurrentMethodStackOffset);
1169}
1170
1171void InstructionCodeGeneratorARM::VisitInvokeStatic(HInvokeStatic* invoke) {
1172  Register temp = invoke->GetLocations()->GetTemp(0).As<Register>();
1173
1174  // TODO: Implement all kinds of calls:
1175  // 1) boot -> boot
1176  // 2) app -> boot
1177  // 3) app -> app
1178  //
1179  // Currently we implement the app -> app logic, which looks up in the resolve cache.
1180
1181  // temp = method;
1182  codegen_->LoadCurrentMethod(temp);
1183  // temp = temp->dex_cache_resolved_methods_;
1184  __ LoadFromOffset(
1185      kLoadWord, temp, temp, mirror::ArtMethod::DexCacheResolvedMethodsOffset().Int32Value());
1186  // temp = temp[index_in_cache]
1187  __ LoadFromOffset(
1188      kLoadWord, temp, temp, CodeGenerator::GetCacheOffset(invoke->GetIndexInDexCache()));
1189  // LR = temp[offset_of_quick_compiled_code]
1190  __ LoadFromOffset(kLoadWord, LR, temp,
1191                     mirror::ArtMethod::EntryPointFromQuickCompiledCodeOffset().Int32Value());
1192  // LR()
1193  __ blx(LR);
1194
1195  codegen_->RecordPcInfo(invoke, invoke->GetDexPc());
1196  DCHECK(!codegen_->IsLeafMethod());
1197}
1198
1199void LocationsBuilderARM::HandleInvoke(HInvoke* invoke) {
1200  LocationSummary* locations =
1201      new (GetGraph()->GetArena()) LocationSummary(invoke, LocationSummary::kCall);
1202  locations->AddTemp(Location::RegisterLocation(R0));
1203
1204  InvokeDexCallingConventionVisitor calling_convention_visitor;
1205  for (size_t i = 0; i < invoke->InputCount(); i++) {
1206    HInstruction* input = invoke->InputAt(i);
1207    locations->SetInAt(i, calling_convention_visitor.GetNextLocation(input->GetType()));
1208  }
1209
1210  locations->SetOut(calling_convention_visitor.GetReturnLocation(invoke->GetType()));
1211}
1212
1213void LocationsBuilderARM::VisitInvokeVirtual(HInvokeVirtual* invoke) {
1214  HandleInvoke(invoke);
1215}
1216
1217void InstructionCodeGeneratorARM::VisitInvokeVirtual(HInvokeVirtual* invoke) {
1218  Register temp = invoke->GetLocations()->GetTemp(0).As<Register>();
1219  uint32_t method_offset = mirror::Class::EmbeddedVTableOffset().Uint32Value() +
1220          invoke->GetVTableIndex() * sizeof(mirror::Class::VTableEntry);
1221  LocationSummary* locations = invoke->GetLocations();
1222  Location receiver = locations->InAt(0);
1223  uint32_t class_offset = mirror::Object::ClassOffset().Int32Value();
1224  // temp = object->GetClass();
1225  if (receiver.IsStackSlot()) {
1226    __ LoadFromOffset(kLoadWord, temp, SP, receiver.GetStackIndex());
1227    __ LoadFromOffset(kLoadWord, temp, temp, class_offset);
1228  } else {
1229    __ LoadFromOffset(kLoadWord, temp, receiver.As<Register>(), class_offset);
1230  }
1231  // temp = temp->GetMethodAt(method_offset);
1232  uint32_t entry_point = mirror::ArtMethod::EntryPointFromQuickCompiledCodeOffset().Int32Value();
1233  __ LoadFromOffset(kLoadWord, temp, temp, method_offset);
1234  // LR = temp->GetEntryPoint();
1235  __ LoadFromOffset(kLoadWord, LR, temp, entry_point);
1236  // LR();
1237  __ blx(LR);
1238  DCHECK(!codegen_->IsLeafMethod());
1239  codegen_->RecordPcInfo(invoke, invoke->GetDexPc());
1240}
1241
1242void LocationsBuilderARM::VisitInvokeInterface(HInvokeInterface* invoke) {
1243  HandleInvoke(invoke);
1244  // Add the hidden argument.
1245  invoke->GetLocations()->AddTemp(Location::RegisterLocation(R12));
1246}
1247
1248void InstructionCodeGeneratorARM::VisitInvokeInterface(HInvokeInterface* invoke) {
1249  // TODO: b/18116999, our IMTs can miss an IncompatibleClassChangeError.
1250  Register temp = invoke->GetLocations()->GetTemp(0).As<Register>();
1251  uint32_t method_offset = mirror::Class::EmbeddedImTableOffset().Uint32Value() +
1252          (invoke->GetImtIndex() % mirror::Class::kImtSize) * sizeof(mirror::Class::ImTableEntry);
1253  LocationSummary* locations = invoke->GetLocations();
1254  Location receiver = locations->InAt(0);
1255  uint32_t class_offset = mirror::Object::ClassOffset().Int32Value();
1256
1257  // Set the hidden argument.
1258  __ LoadImmediate(invoke->GetLocations()->GetTemp(1).As<Register>(), invoke->GetDexMethodIndex());
1259
1260  // temp = object->GetClass();
1261  if (receiver.IsStackSlot()) {
1262    __ LoadFromOffset(kLoadWord, temp, SP, receiver.GetStackIndex());
1263    __ LoadFromOffset(kLoadWord, temp, temp, class_offset);
1264  } else {
1265    __ LoadFromOffset(kLoadWord, temp, receiver.As<Register>(), class_offset);
1266  }
1267  // temp = temp->GetImtEntryAt(method_offset);
1268  uint32_t entry_point = mirror::ArtMethod::EntryPointFromQuickCompiledCodeOffset().Int32Value();
1269  __ LoadFromOffset(kLoadWord, temp, temp, method_offset);
1270  // LR = temp->GetEntryPoint();
1271  __ LoadFromOffset(kLoadWord, LR, temp, entry_point);
1272  // LR();
1273  __ blx(LR);
1274  DCHECK(!codegen_->IsLeafMethod());
1275  codegen_->RecordPcInfo(invoke, invoke->GetDexPc());
1276}
1277
1278void LocationsBuilderARM::VisitNeg(HNeg* neg) {
1279  LocationSummary* locations =
1280      new (GetGraph()->GetArena()) LocationSummary(neg, LocationSummary::kNoCall);
1281  switch (neg->GetResultType()) {
1282    case Primitive::kPrimInt:
1283    case Primitive::kPrimLong: {
1284      bool output_overlaps = (neg->GetResultType() == Primitive::kPrimLong);
1285      locations->SetInAt(0, Location::RequiresRegister());
1286      locations->SetOut(Location::RequiresRegister(), output_overlaps);
1287      break;
1288    }
1289
1290    case Primitive::kPrimFloat:
1291    case Primitive::kPrimDouble:
1292      locations->SetInAt(0, Location::RequiresFpuRegister());
1293      locations->SetOut(Location::RequiresFpuRegister(), Location::kNoOutputOverlap);
1294      break;
1295
1296    default:
1297      LOG(FATAL) << "Unexpected neg type " << neg->GetResultType();
1298  }
1299}
1300
1301void InstructionCodeGeneratorARM::VisitNeg(HNeg* neg) {
1302  LocationSummary* locations = neg->GetLocations();
1303  Location out = locations->Out();
1304  Location in = locations->InAt(0);
1305  switch (neg->GetResultType()) {
1306    case Primitive::kPrimInt:
1307      DCHECK(in.IsRegister());
1308      __ rsb(out.As<Register>(), in.As<Register>(), ShifterOperand(0));
1309      break;
1310
1311    case Primitive::kPrimLong:
1312      DCHECK(in.IsRegisterPair());
1313      // out.lo = 0 - in.lo (and update the carry/borrow (C) flag)
1314      __ rsbs(out.AsRegisterPairLow<Register>(),
1315              in.AsRegisterPairLow<Register>(),
1316              ShifterOperand(0));
1317      // We cannot emit an RSC (Reverse Subtract with Carry)
1318      // instruction here, as it does not exist in the Thumb-2
1319      // instruction set.  We use the following approach
1320      // using SBC and SUB instead.
1321      //
1322      // out.hi = -C
1323      __ sbc(out.AsRegisterPairHigh<Register>(),
1324             out.AsRegisterPairHigh<Register>(),
1325             ShifterOperand(out.AsRegisterPairHigh<Register>()));
1326      // out.hi = out.hi - in.hi
1327      __ sub(out.AsRegisterPairHigh<Register>(),
1328             out.AsRegisterPairHigh<Register>(),
1329             ShifterOperand(in.AsRegisterPairHigh<Register>()));
1330      break;
1331
1332    case Primitive::kPrimFloat:
1333      DCHECK(in.IsFpuRegister());
1334      __ vnegs(out.As<SRegister>(), in.As<SRegister>());
1335      break;
1336
1337    case Primitive::kPrimDouble:
1338      DCHECK(in.IsFpuRegisterPair());
1339      __ vnegd(FromLowSToD(out.AsFpuRegisterPairLow<SRegister>()),
1340               FromLowSToD(in.AsFpuRegisterPairLow<SRegister>()));
1341      break;
1342
1343    default:
1344      LOG(FATAL) << "Unexpected neg type " << neg->GetResultType();
1345  }
1346}
1347
1348void LocationsBuilderARM::VisitTypeConversion(HTypeConversion* conversion) {
1349  LocationSummary* locations =
1350      new (GetGraph()->GetArena()) LocationSummary(conversion, LocationSummary::kNoCall);
1351  Primitive::Type result_type = conversion->GetResultType();
1352  Primitive::Type input_type = conversion->GetInputType();
1353  switch (result_type) {
1354    case Primitive::kPrimByte:
1355      switch (input_type) {
1356        case Primitive::kPrimShort:
1357        case Primitive::kPrimInt:
1358        case Primitive::kPrimChar:
1359          // Processing a Dex `int-to-byte' instruction.
1360          locations->SetInAt(0, Location::RequiresRegister());
1361          locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1362          break;
1363
1364        default:
1365          LOG(FATAL) << "Unexpected type conversion from " << input_type
1366                     << " to " << result_type;
1367      }
1368      break;
1369
1370    case Primitive::kPrimShort:
1371      switch (input_type) {
1372        case Primitive::kPrimByte:
1373        case Primitive::kPrimInt:
1374        case Primitive::kPrimChar:
1375          // Processing a Dex `int-to-short' instruction.
1376          locations->SetInAt(0, Location::RequiresRegister());
1377          locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1378          break;
1379
1380        default:
1381          LOG(FATAL) << "Unexpected type conversion from " << input_type
1382                     << " to " << result_type;
1383      }
1384      break;
1385
1386    case Primitive::kPrimInt:
1387      switch (input_type) {
1388        case Primitive::kPrimLong:
1389          // Processing a Dex `long-to-int' instruction.
1390          locations->SetInAt(0, Location::Any());
1391          locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1392          break;
1393
1394        case Primitive::kPrimFloat:
1395        case Primitive::kPrimDouble:
1396          LOG(FATAL) << "Type conversion from " << input_type
1397                     << " to " << result_type << " not yet implemented";
1398          break;
1399
1400        default:
1401          LOG(FATAL) << "Unexpected type conversion from " << input_type
1402                     << " to " << result_type;
1403      }
1404      break;
1405
1406    case Primitive::kPrimLong:
1407      switch (input_type) {
1408        case Primitive::kPrimByte:
1409        case Primitive::kPrimShort:
1410        case Primitive::kPrimInt:
1411        case Primitive::kPrimChar:
1412          // Processing a Dex `int-to-long' instruction.
1413          locations->SetInAt(0, Location::RequiresRegister());
1414          locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1415          break;
1416
1417        case Primitive::kPrimFloat:
1418        case Primitive::kPrimDouble:
1419          LOG(FATAL) << "Type conversion from " << input_type << " to "
1420                     << result_type << " not yet implemented";
1421          break;
1422
1423        default:
1424          LOG(FATAL) << "Unexpected type conversion from " << input_type
1425                     << " to " << result_type;
1426      }
1427      break;
1428
1429    case Primitive::kPrimChar:
1430      switch (input_type) {
1431        case Primitive::kPrimByte:
1432        case Primitive::kPrimShort:
1433        case Primitive::kPrimInt:
1434        case Primitive::kPrimChar:
1435          // Processing a Dex `int-to-char' instruction.
1436          locations->SetInAt(0, Location::RequiresRegister());
1437          locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1438          break;
1439
1440        default:
1441          LOG(FATAL) << "Unexpected type conversion from " << input_type
1442                     << " to " << result_type;
1443      }
1444      break;
1445
1446    case Primitive::kPrimFloat:
1447      switch (input_type) {
1448        case Primitive::kPrimByte:
1449        case Primitive::kPrimShort:
1450        case Primitive::kPrimInt:
1451        case Primitive::kPrimChar:
1452          // Processing a Dex `int-to-float' instruction.
1453          locations->SetInAt(0, Location::RequiresRegister());
1454          locations->SetOut(Location::RequiresFpuRegister());
1455          break;
1456
1457        case Primitive::kPrimLong:
1458        case Primitive::kPrimDouble:
1459          LOG(FATAL) << "Type conversion from " << input_type
1460                     << " to " << result_type << " not yet implemented";
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::kPrimDouble:
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-double' instruction.
1476          locations->SetInAt(0, Location::RequiresRegister());
1477          locations->SetOut(Location::RequiresFpuRegister());
1478          break;
1479
1480        case Primitive::kPrimLong:
1481        case Primitive::kPrimFloat:
1482          LOG(FATAL) << "Type conversion from " << input_type
1483                     << " to " << result_type << " not yet implemented";
1484          break;
1485
1486        default:
1487          LOG(FATAL) << "Unexpected type conversion from " << input_type
1488                     << " to " << result_type;
1489      };
1490      break;
1491
1492    default:
1493      LOG(FATAL) << "Unexpected type conversion from " << input_type
1494                 << " to " << result_type;
1495  }
1496}
1497
1498void InstructionCodeGeneratorARM::VisitTypeConversion(HTypeConversion* conversion) {
1499  LocationSummary* locations = conversion->GetLocations();
1500  Location out = locations->Out();
1501  Location in = locations->InAt(0);
1502  Primitive::Type result_type = conversion->GetResultType();
1503  Primitive::Type input_type = conversion->GetInputType();
1504  switch (result_type) {
1505    case Primitive::kPrimByte:
1506      switch (input_type) {
1507        case Primitive::kPrimShort:
1508        case Primitive::kPrimInt:
1509        case Primitive::kPrimChar:
1510          // Processing a Dex `int-to-byte' instruction.
1511          __ sbfx(out.As<Register>(), in.As<Register>(), 0, 8);
1512          break;
1513
1514        default:
1515          LOG(FATAL) << "Unexpected type conversion from " << input_type
1516                     << " to " << result_type;
1517      }
1518      break;
1519
1520    case Primitive::kPrimShort:
1521      switch (input_type) {
1522        case Primitive::kPrimByte:
1523        case Primitive::kPrimInt:
1524        case Primitive::kPrimChar:
1525          // Processing a Dex `int-to-short' instruction.
1526          __ sbfx(out.As<Register>(), in.As<Register>(), 0, 16);
1527          break;
1528
1529        default:
1530          LOG(FATAL) << "Unexpected type conversion from " << input_type
1531                     << " to " << result_type;
1532      }
1533      break;
1534
1535    case Primitive::kPrimInt:
1536      switch (input_type) {
1537        case Primitive::kPrimLong:
1538          // Processing a Dex `long-to-int' instruction.
1539          DCHECK(out.IsRegister());
1540          if (in.IsRegisterPair()) {
1541            __ Mov(out.As<Register>(), in.AsRegisterPairLow<Register>());
1542          } else if (in.IsDoubleStackSlot()) {
1543            __ LoadFromOffset(kLoadWord, out.As<Register>(), SP, in.GetStackIndex());
1544          } else {
1545            DCHECK(in.IsConstant());
1546            DCHECK(in.GetConstant()->IsLongConstant());
1547            int64_t value = in.GetConstant()->AsLongConstant()->GetValue();
1548            __ LoadImmediate(out.As<Register>(), static_cast<int32_t>(value));
1549          }
1550          break;
1551
1552        case Primitive::kPrimFloat:
1553        case Primitive::kPrimDouble:
1554          LOG(FATAL) << "Type conversion from " << input_type
1555                     << " to " << result_type << " not yet implemented";
1556          break;
1557
1558        default:
1559          LOG(FATAL) << "Unexpected type conversion from " << input_type
1560                     << " to " << result_type;
1561      }
1562      break;
1563
1564    case Primitive::kPrimLong:
1565      switch (input_type) {
1566        case Primitive::kPrimByte:
1567        case Primitive::kPrimShort:
1568        case Primitive::kPrimInt:
1569        case Primitive::kPrimChar:
1570          // Processing a Dex `int-to-long' instruction.
1571          DCHECK(out.IsRegisterPair());
1572          DCHECK(in.IsRegister());
1573          __ Mov(out.AsRegisterPairLow<Register>(), in.As<Register>());
1574          // Sign extension.
1575          __ Asr(out.AsRegisterPairHigh<Register>(),
1576                 out.AsRegisterPairLow<Register>(),
1577                 31);
1578          break;
1579
1580        case Primitive::kPrimFloat:
1581        case Primitive::kPrimDouble:
1582          LOG(FATAL) << "Type conversion from " << input_type << " to "
1583                     << result_type << " not yet implemented";
1584          break;
1585
1586        default:
1587          LOG(FATAL) << "Unexpected type conversion from " << input_type
1588                     << " to " << result_type;
1589      }
1590      break;
1591
1592    case Primitive::kPrimChar:
1593      switch (input_type) {
1594        case Primitive::kPrimByte:
1595        case Primitive::kPrimShort:
1596        case Primitive::kPrimInt:
1597        case Primitive::kPrimChar:
1598          // Processing a Dex `int-to-char' instruction.
1599          __ ubfx(out.As<Register>(), in.As<Register>(), 0, 16);
1600          break;
1601
1602        default:
1603          LOG(FATAL) << "Unexpected type conversion from " << input_type
1604                     << " to " << result_type;
1605      }
1606      break;
1607
1608    case Primitive::kPrimFloat:
1609      switch (input_type) {
1610        case Primitive::kPrimByte:
1611        case Primitive::kPrimShort:
1612        case Primitive::kPrimInt:
1613        case Primitive::kPrimChar: {
1614          // Processing a Dex `int-to-float' instruction.
1615          __ vmovsr(out.As<SRegister>(), in.As<Register>());
1616          __ vcvtsi(out.As<SRegister>(), out.As<SRegister>());
1617          break;
1618        }
1619
1620        case Primitive::kPrimLong:
1621        case Primitive::kPrimDouble:
1622          LOG(FATAL) << "Type conversion from " << input_type
1623                     << " to " << result_type << " not yet implemented";
1624          break;
1625
1626        default:
1627          LOG(FATAL) << "Unexpected type conversion from " << input_type
1628                     << " to " << result_type;
1629      };
1630      break;
1631
1632    case Primitive::kPrimDouble:
1633      switch (input_type) {
1634        case Primitive::kPrimByte:
1635        case Primitive::kPrimShort:
1636        case Primitive::kPrimInt:
1637        case Primitive::kPrimChar: {
1638          // Processing a Dex `int-to-double' instruction.
1639          __ vmovsr(out.AsFpuRegisterPairLow<SRegister>(), in.As<Register>());
1640          __ vcvtdi(FromLowSToD(out.AsFpuRegisterPairLow<SRegister>()),
1641                    out.AsFpuRegisterPairLow<SRegister>());
1642          break;
1643        }
1644
1645        case Primitive::kPrimLong:
1646        case Primitive::kPrimFloat:
1647          LOG(FATAL) << "Type conversion from " << input_type
1648                     << " to " << result_type << " not yet implemented";
1649          break;
1650
1651        default:
1652          LOG(FATAL) << "Unexpected type conversion from " << input_type
1653                     << " to " << result_type;
1654      };
1655      break;
1656
1657    default:
1658      LOG(FATAL) << "Unexpected type conversion from " << input_type
1659                 << " to " << result_type;
1660  }
1661}
1662
1663void LocationsBuilderARM::VisitAdd(HAdd* add) {
1664  LocationSummary* locations =
1665      new (GetGraph()->GetArena()) LocationSummary(add, LocationSummary::kNoCall);
1666  switch (add->GetResultType()) {
1667    case Primitive::kPrimInt:
1668    case Primitive::kPrimLong: {
1669      bool output_overlaps = (add->GetResultType() == Primitive::kPrimLong);
1670      locations->SetInAt(0, Location::RequiresRegister());
1671      locations->SetInAt(1, Location::RegisterOrConstant(add->InputAt(1)));
1672      locations->SetOut(Location::RequiresRegister(), output_overlaps);
1673      break;
1674    }
1675
1676    case Primitive::kPrimFloat:
1677    case Primitive::kPrimDouble: {
1678      locations->SetInAt(0, Location::RequiresFpuRegister());
1679      locations->SetInAt(1, Location::RequiresFpuRegister());
1680      locations->SetOut(Location::RequiresFpuRegister(), Location::kNoOutputOverlap);
1681      break;
1682    }
1683
1684    default:
1685      LOG(FATAL) << "Unexpected add type " << add->GetResultType();
1686  }
1687}
1688
1689void InstructionCodeGeneratorARM::VisitAdd(HAdd* add) {
1690  LocationSummary* locations = add->GetLocations();
1691  Location out = locations->Out();
1692  Location first = locations->InAt(0);
1693  Location second = locations->InAt(1);
1694  switch (add->GetResultType()) {
1695    case Primitive::kPrimInt:
1696      if (second.IsRegister()) {
1697        __ add(out.As<Register>(), first.As<Register>(), ShifterOperand(second.As<Register>()));
1698      } else {
1699        __ AddConstant(out.As<Register>(),
1700                       first.As<Register>(),
1701                       second.GetConstant()->AsIntConstant()->GetValue());
1702      }
1703      break;
1704
1705    case Primitive::kPrimLong:
1706      __ adds(out.AsRegisterPairLow<Register>(),
1707              first.AsRegisterPairLow<Register>(),
1708              ShifterOperand(second.AsRegisterPairLow<Register>()));
1709      __ adc(out.AsRegisterPairHigh<Register>(),
1710             first.AsRegisterPairHigh<Register>(),
1711             ShifterOperand(second.AsRegisterPairHigh<Register>()));
1712      break;
1713
1714    case Primitive::kPrimFloat:
1715      __ vadds(out.As<SRegister>(), first.As<SRegister>(), second.As<SRegister>());
1716      break;
1717
1718    case Primitive::kPrimDouble:
1719      __ vaddd(FromLowSToD(out.AsFpuRegisterPairLow<SRegister>()),
1720               FromLowSToD(first.AsFpuRegisterPairLow<SRegister>()),
1721               FromLowSToD(second.AsFpuRegisterPairLow<SRegister>()));
1722      break;
1723
1724    default:
1725      LOG(FATAL) << "Unexpected add type " << add->GetResultType();
1726  }
1727}
1728
1729void LocationsBuilderARM::VisitSub(HSub* sub) {
1730  LocationSummary* locations =
1731      new (GetGraph()->GetArena()) LocationSummary(sub, LocationSummary::kNoCall);
1732  switch (sub->GetResultType()) {
1733    case Primitive::kPrimInt:
1734    case Primitive::kPrimLong: {
1735      bool output_overlaps = (sub->GetResultType() == Primitive::kPrimLong);
1736      locations->SetInAt(0, Location::RequiresRegister());
1737      locations->SetInAt(1, Location::RegisterOrConstant(sub->InputAt(1)));
1738      locations->SetOut(Location::RequiresRegister(), output_overlaps);
1739      break;
1740    }
1741    case Primitive::kPrimFloat:
1742    case Primitive::kPrimDouble: {
1743      locations->SetInAt(0, Location::RequiresFpuRegister());
1744      locations->SetInAt(1, Location::RequiresFpuRegister());
1745      locations->SetOut(Location::RequiresFpuRegister(), Location::kNoOutputOverlap);
1746      break;
1747    }
1748    default:
1749      LOG(FATAL) << "Unexpected sub type " << sub->GetResultType();
1750  }
1751}
1752
1753void InstructionCodeGeneratorARM::VisitSub(HSub* sub) {
1754  LocationSummary* locations = sub->GetLocations();
1755  Location out = locations->Out();
1756  Location first = locations->InAt(0);
1757  Location second = locations->InAt(1);
1758  switch (sub->GetResultType()) {
1759    case Primitive::kPrimInt: {
1760      if (second.IsRegister()) {
1761        __ sub(out.As<Register>(), first.As<Register>(), ShifterOperand(second.As<Register>()));
1762      } else {
1763        __ AddConstant(out.As<Register>(),
1764                       first.As<Register>(),
1765                       -second.GetConstant()->AsIntConstant()->GetValue());
1766      }
1767      break;
1768    }
1769
1770    case Primitive::kPrimLong: {
1771      __ subs(out.AsRegisterPairLow<Register>(),
1772              first.AsRegisterPairLow<Register>(),
1773              ShifterOperand(second.AsRegisterPairLow<Register>()));
1774      __ sbc(out.AsRegisterPairHigh<Register>(),
1775             first.AsRegisterPairHigh<Register>(),
1776             ShifterOperand(second.AsRegisterPairHigh<Register>()));
1777      break;
1778    }
1779
1780    case Primitive::kPrimFloat: {
1781      __ vsubs(out.As<SRegister>(), first.As<SRegister>(), second.As<SRegister>());
1782      break;
1783    }
1784
1785    case Primitive::kPrimDouble: {
1786      __ vsubd(FromLowSToD(out.AsFpuRegisterPairLow<SRegister>()),
1787               FromLowSToD(first.AsFpuRegisterPairLow<SRegister>()),
1788               FromLowSToD(second.AsFpuRegisterPairLow<SRegister>()));
1789      break;
1790    }
1791
1792
1793    default:
1794      LOG(FATAL) << "Unexpected sub type " << sub->GetResultType();
1795  }
1796}
1797
1798void LocationsBuilderARM::VisitMul(HMul* mul) {
1799  LocationSummary* locations =
1800      new (GetGraph()->GetArena()) LocationSummary(mul, LocationSummary::kNoCall);
1801  switch (mul->GetResultType()) {
1802    case Primitive::kPrimInt:
1803    case Primitive::kPrimLong:  {
1804      locations->SetInAt(0, Location::RequiresRegister());
1805      locations->SetInAt(1, Location::RequiresRegister());
1806      locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1807      break;
1808    }
1809
1810    case Primitive::kPrimFloat:
1811    case Primitive::kPrimDouble: {
1812      locations->SetInAt(0, Location::RequiresFpuRegister());
1813      locations->SetInAt(1, Location::RequiresFpuRegister());
1814      locations->SetOut(Location::RequiresFpuRegister(), Location::kNoOutputOverlap);
1815      break;
1816    }
1817
1818    default:
1819      LOG(FATAL) << "Unexpected mul type " << mul->GetResultType();
1820  }
1821}
1822
1823void InstructionCodeGeneratorARM::VisitMul(HMul* mul) {
1824  LocationSummary* locations = mul->GetLocations();
1825  Location out = locations->Out();
1826  Location first = locations->InAt(0);
1827  Location second = locations->InAt(1);
1828  switch (mul->GetResultType()) {
1829    case Primitive::kPrimInt: {
1830      __ mul(out.As<Register>(), first.As<Register>(), second.As<Register>());
1831      break;
1832    }
1833    case Primitive::kPrimLong: {
1834      Register out_hi = out.AsRegisterPairHigh<Register>();
1835      Register out_lo = out.AsRegisterPairLow<Register>();
1836      Register in1_hi = first.AsRegisterPairHigh<Register>();
1837      Register in1_lo = first.AsRegisterPairLow<Register>();
1838      Register in2_hi = second.AsRegisterPairHigh<Register>();
1839      Register in2_lo = second.AsRegisterPairLow<Register>();
1840
1841      // Extra checks to protect caused by the existence of R1_R2.
1842      // The algorithm is wrong if out.hi is either in1.lo or in2.lo:
1843      // (e.g. in1=r0_r1, in2=r2_r3 and out=r1_r2);
1844      DCHECK_NE(out_hi, in1_lo);
1845      DCHECK_NE(out_hi, in2_lo);
1846
1847      // input: in1 - 64 bits, in2 - 64 bits
1848      // output: out
1849      // formula: out.hi : out.lo = (in1.lo * in2.hi + in1.hi * in2.lo)* 2^32 + in1.lo * in2.lo
1850      // parts: out.hi = in1.lo * in2.hi + in1.hi * in2.lo + (in1.lo * in2.lo)[63:32]
1851      // parts: out.lo = (in1.lo * in2.lo)[31:0]
1852
1853      // IP <- in1.lo * in2.hi
1854      __ mul(IP, in1_lo, in2_hi);
1855      // out.hi <- in1.lo * in2.hi + in1.hi * in2.lo
1856      __ mla(out_hi, in1_hi, in2_lo, IP);
1857      // out.lo <- (in1.lo * in2.lo)[31:0];
1858      __ umull(out_lo, IP, in1_lo, in2_lo);
1859      // out.hi <- in2.hi * in1.lo +  in2.lo * in1.hi + (in1.lo * in2.lo)[63:32]
1860      __ add(out_hi, out_hi, ShifterOperand(IP));
1861      break;
1862    }
1863
1864    case Primitive::kPrimFloat: {
1865      __ vmuls(out.As<SRegister>(), first.As<SRegister>(), second.As<SRegister>());
1866      break;
1867    }
1868
1869    case Primitive::kPrimDouble: {
1870      __ vmuld(FromLowSToD(out.AsFpuRegisterPairLow<SRegister>()),
1871               FromLowSToD(first.AsFpuRegisterPairLow<SRegister>()),
1872               FromLowSToD(second.AsFpuRegisterPairLow<SRegister>()));
1873      break;
1874    }
1875
1876    default:
1877      LOG(FATAL) << "Unexpected mul type " << mul->GetResultType();
1878  }
1879}
1880
1881void LocationsBuilderARM::VisitDiv(HDiv* div) {
1882  LocationSummary::CallKind call_kind = div->GetResultType() == Primitive::kPrimLong
1883      ? LocationSummary::kCall
1884      : LocationSummary::kNoCall;
1885  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(div, call_kind);
1886
1887  switch (div->GetResultType()) {
1888    case Primitive::kPrimInt: {
1889      locations->SetInAt(0, Location::RequiresRegister());
1890      locations->SetInAt(1, Location::RequiresRegister());
1891      locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1892      break;
1893    }
1894    case Primitive::kPrimLong: {
1895      InvokeRuntimeCallingConvention calling_convention;
1896      locations->SetInAt(0, Location::RegisterPairLocation(
1897          calling_convention.GetRegisterAt(0), calling_convention.GetRegisterAt(1)));
1898      locations->SetInAt(1, Location::RegisterPairLocation(
1899          calling_convention.GetRegisterAt(2), calling_convention.GetRegisterAt(3)));
1900      // The runtime helper puts the output in R0,R2.
1901      locations->SetOut(Location::RegisterPairLocation(R0, R2));
1902      break;
1903    }
1904    case Primitive::kPrimFloat:
1905    case Primitive::kPrimDouble: {
1906      locations->SetInAt(0, Location::RequiresFpuRegister());
1907      locations->SetInAt(1, Location::RequiresFpuRegister());
1908      locations->SetOut(Location::RequiresFpuRegister(), Location::kNoOutputOverlap);
1909      break;
1910    }
1911
1912    default:
1913      LOG(FATAL) << "Unexpected div type " << div->GetResultType();
1914  }
1915}
1916
1917void InstructionCodeGeneratorARM::VisitDiv(HDiv* div) {
1918  LocationSummary* locations = div->GetLocations();
1919  Location out = locations->Out();
1920  Location first = locations->InAt(0);
1921  Location second = locations->InAt(1);
1922
1923  switch (div->GetResultType()) {
1924    case Primitive::kPrimInt: {
1925      __ sdiv(out.As<Register>(), first.As<Register>(), second.As<Register>());
1926      break;
1927    }
1928
1929    case Primitive::kPrimLong: {
1930      InvokeRuntimeCallingConvention calling_convention;
1931      DCHECK_EQ(calling_convention.GetRegisterAt(0), first.AsRegisterPairLow<Register>());
1932      DCHECK_EQ(calling_convention.GetRegisterAt(1), first.AsRegisterPairHigh<Register>());
1933      DCHECK_EQ(calling_convention.GetRegisterAt(2), second.AsRegisterPairLow<Register>());
1934      DCHECK_EQ(calling_convention.GetRegisterAt(3), second.AsRegisterPairHigh<Register>());
1935      DCHECK_EQ(R0, out.AsRegisterPairLow<Register>());
1936      DCHECK_EQ(R2, out.AsRegisterPairHigh<Register>());
1937
1938      codegen_->InvokeRuntime(QUICK_ENTRY_POINT(pLdiv), div, div->GetDexPc());
1939      break;
1940    }
1941
1942    case Primitive::kPrimFloat: {
1943      __ vdivs(out.As<SRegister>(), first.As<SRegister>(), second.As<SRegister>());
1944      break;
1945    }
1946
1947    case Primitive::kPrimDouble: {
1948      __ vdivd(FromLowSToD(out.AsFpuRegisterPairLow<SRegister>()),
1949               FromLowSToD(first.AsFpuRegisterPairLow<SRegister>()),
1950               FromLowSToD(second.AsFpuRegisterPairLow<SRegister>()));
1951      break;
1952    }
1953
1954    default:
1955      LOG(FATAL) << "Unexpected div type " << div->GetResultType();
1956  }
1957}
1958
1959void LocationsBuilderARM::VisitRem(HRem* rem) {
1960  LocationSummary::CallKind call_kind = rem->GetResultType() == Primitive::kPrimLong
1961      ? LocationSummary::kCall
1962      : LocationSummary::kNoCall;
1963  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(rem, call_kind);
1964
1965  switch (rem->GetResultType()) {
1966    case Primitive::kPrimInt: {
1967      locations->SetInAt(0, Location::RequiresRegister());
1968      locations->SetInAt(1, Location::RequiresRegister());
1969      locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1970      locations->AddTemp(Location::RequiresRegister());
1971      break;
1972    }
1973    case Primitive::kPrimLong: {
1974      InvokeRuntimeCallingConvention calling_convention;
1975      locations->SetInAt(0, Location::RegisterPairLocation(
1976          calling_convention.GetRegisterAt(0), calling_convention.GetRegisterAt(1)));
1977      locations->SetInAt(1, Location::RegisterPairLocation(
1978          calling_convention.GetRegisterAt(2), calling_convention.GetRegisterAt(3)));
1979      // The runtime helper puts the output in R2,R3.
1980      locations->SetOut(Location::RegisterPairLocation(R2, R3));
1981      break;
1982    }
1983    case Primitive::kPrimFloat:
1984    case Primitive::kPrimDouble: {
1985      LOG(FATAL) << "Unimplemented rem type " << rem->GetResultType();
1986      break;
1987    }
1988
1989    default:
1990      LOG(FATAL) << "Unexpected rem type " << rem->GetResultType();
1991  }
1992}
1993
1994void InstructionCodeGeneratorARM::VisitRem(HRem* rem) {
1995  LocationSummary* locations = rem->GetLocations();
1996  Location out = locations->Out();
1997  Location first = locations->InAt(0);
1998  Location second = locations->InAt(1);
1999
2000  switch (rem->GetResultType()) {
2001    case Primitive::kPrimInt: {
2002      Register reg1 = first.As<Register>();
2003      Register reg2 = second.As<Register>();
2004      Register temp = locations->GetTemp(0).As<Register>();
2005
2006      // temp = reg1 / reg2  (integer division)
2007      // temp = temp * reg2
2008      // dest = reg1 - temp
2009      __ sdiv(temp, reg1, reg2);
2010      __ mul(temp, temp, reg2);
2011      __ sub(out.As<Register>(), reg1, ShifterOperand(temp));
2012      break;
2013    }
2014
2015    case Primitive::kPrimLong: {
2016      InvokeRuntimeCallingConvention calling_convention;
2017      DCHECK_EQ(calling_convention.GetRegisterAt(0), first.AsRegisterPairLow<Register>());
2018      DCHECK_EQ(calling_convention.GetRegisterAt(1), first.AsRegisterPairHigh<Register>());
2019      DCHECK_EQ(calling_convention.GetRegisterAt(2), second.AsRegisterPairLow<Register>());
2020      DCHECK_EQ(calling_convention.GetRegisterAt(3), second.AsRegisterPairHigh<Register>());
2021      DCHECK_EQ(R2, out.AsRegisterPairLow<Register>());
2022      DCHECK_EQ(R3, out.AsRegisterPairHigh<Register>());
2023
2024      codegen_->InvokeRuntime(QUICK_ENTRY_POINT(pLmod), rem, rem->GetDexPc());
2025      break;
2026    }
2027
2028    case Primitive::kPrimFloat:
2029    case Primitive::kPrimDouble: {
2030      LOG(FATAL) << "Unimplemented rem type " << rem->GetResultType();
2031      break;
2032    }
2033
2034    default:
2035      LOG(FATAL) << "Unexpected rem type " << rem->GetResultType();
2036  }
2037}
2038
2039void LocationsBuilderARM::VisitDivZeroCheck(HDivZeroCheck* instruction) {
2040  LocationSummary* locations =
2041      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2042  locations->SetInAt(0, Location::RegisterOrConstant(instruction->InputAt(0)));
2043  if (instruction->HasUses()) {
2044    locations->SetOut(Location::SameAsFirstInput());
2045  }
2046}
2047
2048void InstructionCodeGeneratorARM::VisitDivZeroCheck(HDivZeroCheck* instruction) {
2049  SlowPathCodeARM* slow_path = new (GetGraph()->GetArena()) DivZeroCheckSlowPathARM(instruction);
2050  codegen_->AddSlowPath(slow_path);
2051
2052  LocationSummary* locations = instruction->GetLocations();
2053  Location value = locations->InAt(0);
2054
2055  switch (instruction->GetType()) {
2056    case Primitive::kPrimInt: {
2057      if (value.IsRegister()) {
2058        __ cmp(value.As<Register>(), ShifterOperand(0));
2059        __ b(slow_path->GetEntryLabel(), EQ);
2060      } else {
2061        DCHECK(value.IsConstant()) << value;
2062        if (value.GetConstant()->AsIntConstant()->GetValue() == 0) {
2063          __ b(slow_path->GetEntryLabel());
2064        }
2065      }
2066      break;
2067    }
2068    case Primitive::kPrimLong: {
2069      if (value.IsRegisterPair()) {
2070        __ orrs(IP,
2071                value.AsRegisterPairLow<Register>(),
2072                ShifterOperand(value.AsRegisterPairHigh<Register>()));
2073        __ b(slow_path->GetEntryLabel(), EQ);
2074      } else {
2075        DCHECK(value.IsConstant()) << value;
2076        if (value.GetConstant()->AsLongConstant()->GetValue() == 0) {
2077          __ b(slow_path->GetEntryLabel());
2078        }
2079      }
2080      break;
2081    default:
2082      LOG(FATAL) << "Unexpected type for HDivZeroCheck " << instruction->GetType();
2083    }
2084  }
2085}
2086
2087void LocationsBuilderARM::VisitNewInstance(HNewInstance* instruction) {
2088  LocationSummary* locations =
2089      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kCall);
2090  InvokeRuntimeCallingConvention calling_convention;
2091  locations->AddTemp(Location::RegisterLocation(calling_convention.GetRegisterAt(0)));
2092  locations->AddTemp(Location::RegisterLocation(calling_convention.GetRegisterAt(1)));
2093  locations->SetOut(Location::RegisterLocation(R0));
2094}
2095
2096void InstructionCodeGeneratorARM::VisitNewInstance(HNewInstance* instruction) {
2097  InvokeRuntimeCallingConvention calling_convention;
2098  codegen_->LoadCurrentMethod(calling_convention.GetRegisterAt(1));
2099  __ LoadImmediate(calling_convention.GetRegisterAt(0), instruction->GetTypeIndex());
2100  codegen_->InvokeRuntime(
2101      QUICK_ENTRY_POINT(pAllocObjectWithAccessCheck), instruction, instruction->GetDexPc());
2102}
2103
2104void LocationsBuilderARM::VisitNewArray(HNewArray* instruction) {
2105  LocationSummary* locations =
2106      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kCall);
2107  InvokeRuntimeCallingConvention calling_convention;
2108  locations->AddTemp(Location::RegisterLocation(calling_convention.GetRegisterAt(0)));
2109  locations->AddTemp(Location::RegisterLocation(calling_convention.GetRegisterAt(1)));
2110  locations->SetOut(Location::RegisterLocation(R0));
2111  locations->SetInAt(0, Location::RegisterLocation(calling_convention.GetRegisterAt(2)));
2112}
2113
2114void InstructionCodeGeneratorARM::VisitNewArray(HNewArray* instruction) {
2115  InvokeRuntimeCallingConvention calling_convention;
2116  codegen_->LoadCurrentMethod(calling_convention.GetRegisterAt(1));
2117  __ LoadImmediate(calling_convention.GetRegisterAt(0), instruction->GetTypeIndex());
2118  codegen_->InvokeRuntime(
2119      QUICK_ENTRY_POINT(pAllocArrayWithAccessCheck), instruction, instruction->GetDexPc());
2120}
2121
2122void LocationsBuilderARM::VisitParameterValue(HParameterValue* instruction) {
2123  LocationSummary* locations =
2124      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2125  Location location = parameter_visitor_.GetNextLocation(instruction->GetType());
2126  if (location.IsStackSlot()) {
2127    location = Location::StackSlot(location.GetStackIndex() + codegen_->GetFrameSize());
2128  } else if (location.IsDoubleStackSlot()) {
2129    location = Location::DoubleStackSlot(location.GetStackIndex() + codegen_->GetFrameSize());
2130  }
2131  locations->SetOut(location);
2132}
2133
2134void InstructionCodeGeneratorARM::VisitParameterValue(HParameterValue* instruction) {
2135  // Nothing to do, the parameter is already at its location.
2136  UNUSED(instruction);
2137}
2138
2139void LocationsBuilderARM::VisitNot(HNot* not_) {
2140  LocationSummary* locations =
2141      new (GetGraph()->GetArena()) LocationSummary(not_, LocationSummary::kNoCall);
2142  locations->SetInAt(0, Location::RequiresRegister());
2143  locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
2144}
2145
2146void InstructionCodeGeneratorARM::VisitNot(HNot* not_) {
2147  LocationSummary* locations = not_->GetLocations();
2148  Location out = locations->Out();
2149  Location in = locations->InAt(0);
2150  switch (not_->InputAt(0)->GetType()) {
2151    case Primitive::kPrimBoolean:
2152      __ eor(out.As<Register>(), in.As<Register>(), ShifterOperand(1));
2153      break;
2154
2155    case Primitive::kPrimInt:
2156      __ mvn(out.As<Register>(), ShifterOperand(in.As<Register>()));
2157      break;
2158
2159    case Primitive::kPrimLong:
2160      __ mvn(out.AsRegisterPairLow<Register>(),
2161             ShifterOperand(in.AsRegisterPairLow<Register>()));
2162      __ mvn(out.AsRegisterPairHigh<Register>(),
2163             ShifterOperand(in.AsRegisterPairHigh<Register>()));
2164      break;
2165
2166    default:
2167      LOG(FATAL) << "Unimplemented type for not operation " << not_->GetResultType();
2168  }
2169}
2170
2171void LocationsBuilderARM::VisitCompare(HCompare* compare) {
2172  LocationSummary* locations =
2173      new (GetGraph()->GetArena()) LocationSummary(compare, LocationSummary::kNoCall);
2174  locations->SetInAt(0, Location::RequiresRegister());
2175  locations->SetInAt(1, Location::RequiresRegister());
2176  locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
2177}
2178
2179void InstructionCodeGeneratorARM::VisitCompare(HCompare* compare) {
2180  LocationSummary* locations = compare->GetLocations();
2181  switch (compare->InputAt(0)->GetType()) {
2182    case Primitive::kPrimLong: {
2183      Register output = locations->Out().As<Register>();
2184      Location left = locations->InAt(0);
2185      Location right = locations->InAt(1);
2186      Label less, greater, done;
2187      __ cmp(left.AsRegisterPairHigh<Register>(),
2188             ShifterOperand(right.AsRegisterPairHigh<Register>()));  // Signed compare.
2189      __ b(&less, LT);
2190      __ b(&greater, GT);
2191      // Do LoadImmediate before any `cmp`, as LoadImmediate might affect
2192      // the status flags.
2193      __ LoadImmediate(output, 0);
2194      __ cmp(left.AsRegisterPairLow<Register>(),
2195             ShifterOperand(right.AsRegisterPairLow<Register>()));  // Unsigned compare.
2196      __ b(&done, EQ);
2197      __ b(&less, CC);
2198
2199      __ Bind(&greater);
2200      __ LoadImmediate(output, 1);
2201      __ b(&done);
2202
2203      __ Bind(&less);
2204      __ LoadImmediate(output, -1);
2205
2206      __ Bind(&done);
2207      break;
2208    }
2209    default:
2210      LOG(FATAL) << "Unimplemented compare type " << compare->InputAt(0)->GetType();
2211  }
2212}
2213
2214void LocationsBuilderARM::VisitPhi(HPhi* instruction) {
2215  LocationSummary* locations =
2216      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2217  for (size_t i = 0, e = instruction->InputCount(); i < e; ++i) {
2218    locations->SetInAt(i, Location::Any());
2219  }
2220  locations->SetOut(Location::Any());
2221}
2222
2223void InstructionCodeGeneratorARM::VisitPhi(HPhi* instruction) {
2224  UNUSED(instruction);
2225  LOG(FATAL) << "Unreachable";
2226}
2227
2228void LocationsBuilderARM::VisitInstanceFieldSet(HInstanceFieldSet* instruction) {
2229  LocationSummary* locations =
2230      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2231  bool needs_write_barrier =
2232      CodeGenerator::StoreNeedsWriteBarrier(instruction->GetFieldType(), instruction->GetValue());
2233  locations->SetInAt(0, Location::RequiresRegister());
2234  locations->SetInAt(1, Location::RequiresRegister());
2235  // Temporary registers for the write barrier.
2236  if (needs_write_barrier) {
2237    locations->AddTemp(Location::RequiresRegister());
2238    locations->AddTemp(Location::RequiresRegister());
2239  }
2240}
2241
2242void InstructionCodeGeneratorARM::VisitInstanceFieldSet(HInstanceFieldSet* instruction) {
2243  LocationSummary* locations = instruction->GetLocations();
2244  Register obj = locations->InAt(0).As<Register>();
2245  uint32_t offset = instruction->GetFieldOffset().Uint32Value();
2246  Primitive::Type field_type = instruction->GetFieldType();
2247
2248  switch (field_type) {
2249    case Primitive::kPrimBoolean:
2250    case Primitive::kPrimByte: {
2251      Register value = locations->InAt(1).As<Register>();
2252      __ StoreToOffset(kStoreByte, value, obj, offset);
2253      break;
2254    }
2255
2256    case Primitive::kPrimShort:
2257    case Primitive::kPrimChar: {
2258      Register value = locations->InAt(1).As<Register>();
2259      __ StoreToOffset(kStoreHalfword, value, obj, offset);
2260      break;
2261    }
2262
2263    case Primitive::kPrimInt:
2264    case Primitive::kPrimNot: {
2265      Register value = locations->InAt(1).As<Register>();
2266      __ StoreToOffset(kStoreWord, value, obj, offset);
2267      if (CodeGenerator::StoreNeedsWriteBarrier(field_type, instruction->GetValue())) {
2268        Register temp = locations->GetTemp(0).As<Register>();
2269        Register card = locations->GetTemp(1).As<Register>();
2270        codegen_->MarkGCCard(temp, card, obj, value);
2271      }
2272      break;
2273    }
2274
2275    case Primitive::kPrimLong: {
2276      Location value = locations->InAt(1);
2277      __ StoreToOffset(kStoreWordPair, value.AsRegisterPairLow<Register>(), obj, offset);
2278      break;
2279    }
2280
2281    case Primitive::kPrimFloat: {
2282      SRegister value = locations->InAt(1).As<SRegister>();
2283      __ StoreSToOffset(value, obj, offset);
2284      break;
2285    }
2286
2287    case Primitive::kPrimDouble: {
2288      DRegister value = FromLowSToD(locations->InAt(1).AsFpuRegisterPairLow<SRegister>());
2289      __ StoreDToOffset(value, obj, offset);
2290      break;
2291    }
2292
2293    case Primitive::kPrimVoid:
2294      LOG(FATAL) << "Unreachable type " << field_type;
2295      UNREACHABLE();
2296  }
2297}
2298
2299void LocationsBuilderARM::VisitInstanceFieldGet(HInstanceFieldGet* instruction) {
2300  LocationSummary* locations =
2301      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2302  locations->SetInAt(0, Location::RequiresRegister());
2303  locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
2304}
2305
2306void InstructionCodeGeneratorARM::VisitInstanceFieldGet(HInstanceFieldGet* instruction) {
2307  LocationSummary* locations = instruction->GetLocations();
2308  Register obj = locations->InAt(0).As<Register>();
2309  uint32_t offset = instruction->GetFieldOffset().Uint32Value();
2310
2311  switch (instruction->GetType()) {
2312    case Primitive::kPrimBoolean: {
2313      Register out = locations->Out().As<Register>();
2314      __ LoadFromOffset(kLoadUnsignedByte, out, obj, offset);
2315      break;
2316    }
2317
2318    case Primitive::kPrimByte: {
2319      Register out = locations->Out().As<Register>();
2320      __ LoadFromOffset(kLoadSignedByte, out, obj, offset);
2321      break;
2322    }
2323
2324    case Primitive::kPrimShort: {
2325      Register out = locations->Out().As<Register>();
2326      __ LoadFromOffset(kLoadSignedHalfword, out, obj, offset);
2327      break;
2328    }
2329
2330    case Primitive::kPrimChar: {
2331      Register out = locations->Out().As<Register>();
2332      __ LoadFromOffset(kLoadUnsignedHalfword, out, obj, offset);
2333      break;
2334    }
2335
2336    case Primitive::kPrimInt:
2337    case Primitive::kPrimNot: {
2338      Register out = locations->Out().As<Register>();
2339      __ LoadFromOffset(kLoadWord, out, obj, offset);
2340      break;
2341    }
2342
2343    case Primitive::kPrimLong: {
2344      // TODO: support volatile.
2345      Location out = locations->Out();
2346      __ LoadFromOffset(kLoadWordPair, out.AsRegisterPairLow<Register>(), obj, offset);
2347      break;
2348    }
2349
2350    case Primitive::kPrimFloat: {
2351      SRegister out = locations->Out().As<SRegister>();
2352      __ LoadSFromOffset(out, obj, offset);
2353      break;
2354    }
2355
2356    case Primitive::kPrimDouble: {
2357      DRegister out = FromLowSToD(locations->Out().AsFpuRegisterPairLow<SRegister>());
2358      __ LoadDFromOffset(out, obj, offset);
2359      break;
2360    }
2361
2362    case Primitive::kPrimVoid:
2363      LOG(FATAL) << "Unreachable type " << instruction->GetType();
2364      UNREACHABLE();
2365  }
2366}
2367
2368void LocationsBuilderARM::VisitNullCheck(HNullCheck* instruction) {
2369  LocationSummary* locations =
2370      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2371  locations->SetInAt(0, Location::RequiresRegister());
2372  if (instruction->HasUses()) {
2373    locations->SetOut(Location::SameAsFirstInput());
2374  }
2375}
2376
2377void InstructionCodeGeneratorARM::VisitNullCheck(HNullCheck* instruction) {
2378  SlowPathCodeARM* slow_path = new (GetGraph()->GetArena()) NullCheckSlowPathARM(instruction);
2379  codegen_->AddSlowPath(slow_path);
2380
2381  LocationSummary* locations = instruction->GetLocations();
2382  Location obj = locations->InAt(0);
2383
2384  if (obj.IsRegister()) {
2385    __ cmp(obj.As<Register>(), ShifterOperand(0));
2386    __ b(slow_path->GetEntryLabel(), EQ);
2387  } else {
2388    DCHECK(obj.IsConstant()) << obj;
2389    DCHECK_EQ(obj.GetConstant()->AsIntConstant()->GetValue(), 0);
2390    __ b(slow_path->GetEntryLabel());
2391  }
2392}
2393
2394void LocationsBuilderARM::VisitArrayGet(HArrayGet* instruction) {
2395  LocationSummary* locations =
2396      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2397  locations->SetInAt(0, Location::RequiresRegister());
2398  locations->SetInAt(1, Location::RegisterOrConstant(instruction->InputAt(1)));
2399  locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
2400}
2401
2402void InstructionCodeGeneratorARM::VisitArrayGet(HArrayGet* instruction) {
2403  LocationSummary* locations = instruction->GetLocations();
2404  Register obj = locations->InAt(0).As<Register>();
2405  Location index = locations->InAt(1);
2406
2407  switch (instruction->GetType()) {
2408    case Primitive::kPrimBoolean: {
2409      uint32_t data_offset = mirror::Array::DataOffset(sizeof(uint8_t)).Uint32Value();
2410      Register out = locations->Out().As<Register>();
2411      if (index.IsConstant()) {
2412        size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_1) + data_offset;
2413        __ LoadFromOffset(kLoadUnsignedByte, out, obj, offset);
2414      } else {
2415        __ add(IP, obj, ShifterOperand(index.As<Register>()));
2416        __ LoadFromOffset(kLoadUnsignedByte, out, IP, data_offset);
2417      }
2418      break;
2419    }
2420
2421    case Primitive::kPrimByte: {
2422      uint32_t data_offset = mirror::Array::DataOffset(sizeof(int8_t)).Uint32Value();
2423      Register out = locations->Out().As<Register>();
2424      if (index.IsConstant()) {
2425        size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_1) + data_offset;
2426        __ LoadFromOffset(kLoadSignedByte, out, obj, offset);
2427      } else {
2428        __ add(IP, obj, ShifterOperand(index.As<Register>()));
2429        __ LoadFromOffset(kLoadSignedByte, out, IP, data_offset);
2430      }
2431      break;
2432    }
2433
2434    case Primitive::kPrimShort: {
2435      uint32_t data_offset = mirror::Array::DataOffset(sizeof(int16_t)).Uint32Value();
2436      Register out = locations->Out().As<Register>();
2437      if (index.IsConstant()) {
2438        size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_2) + data_offset;
2439        __ LoadFromOffset(kLoadSignedHalfword, out, obj, offset);
2440      } else {
2441        __ add(IP, obj, ShifterOperand(index.As<Register>(), LSL, TIMES_2));
2442        __ LoadFromOffset(kLoadSignedHalfword, out, IP, data_offset);
2443      }
2444      break;
2445    }
2446
2447    case Primitive::kPrimChar: {
2448      uint32_t data_offset = mirror::Array::DataOffset(sizeof(uint16_t)).Uint32Value();
2449      Register out = locations->Out().As<Register>();
2450      if (index.IsConstant()) {
2451        size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_2) + data_offset;
2452        __ LoadFromOffset(kLoadUnsignedHalfword, out, obj, offset);
2453      } else {
2454        __ add(IP, obj, ShifterOperand(index.As<Register>(), LSL, TIMES_2));
2455        __ LoadFromOffset(kLoadUnsignedHalfword, out, IP, data_offset);
2456      }
2457      break;
2458    }
2459
2460    case Primitive::kPrimInt:
2461    case Primitive::kPrimNot: {
2462      DCHECK_EQ(sizeof(mirror::HeapReference<mirror::Object>), sizeof(int32_t));
2463      uint32_t data_offset = mirror::Array::DataOffset(sizeof(int32_t)).Uint32Value();
2464      Register out = locations->Out().As<Register>();
2465      if (index.IsConstant()) {
2466        size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_4) + data_offset;
2467        __ LoadFromOffset(kLoadWord, out, obj, offset);
2468      } else {
2469        __ add(IP, obj, ShifterOperand(index.As<Register>(), LSL, TIMES_4));
2470        __ LoadFromOffset(kLoadWord, out, IP, data_offset);
2471      }
2472      break;
2473    }
2474
2475    case Primitive::kPrimLong: {
2476      uint32_t data_offset = mirror::Array::DataOffset(sizeof(int64_t)).Uint32Value();
2477      Location out = locations->Out();
2478      if (index.IsConstant()) {
2479        size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_8) + data_offset;
2480        __ LoadFromOffset(kLoadWordPair, out.AsRegisterPairLow<Register>(), obj, offset);
2481      } else {
2482        __ add(IP, obj, ShifterOperand(index.As<Register>(), LSL, TIMES_8));
2483        __ LoadFromOffset(kLoadWordPair, out.AsRegisterPairLow<Register>(), IP, data_offset);
2484      }
2485      break;
2486    }
2487
2488    case Primitive::kPrimFloat:
2489    case Primitive::kPrimDouble:
2490      LOG(FATAL) << "Unimplemented register type " << instruction->GetType();
2491      UNREACHABLE();
2492    case Primitive::kPrimVoid:
2493      LOG(FATAL) << "Unreachable type " << instruction->GetType();
2494      UNREACHABLE();
2495  }
2496}
2497
2498void LocationsBuilderARM::VisitArraySet(HArraySet* instruction) {
2499  Primitive::Type value_type = instruction->GetComponentType();
2500
2501  bool needs_write_barrier =
2502      CodeGenerator::StoreNeedsWriteBarrier(value_type, instruction->GetValue());
2503  bool needs_runtime_call = instruction->NeedsTypeCheck();
2504
2505  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(
2506      instruction, needs_runtime_call ? LocationSummary::kCall : LocationSummary::kNoCall);
2507  if (needs_runtime_call) {
2508    InvokeRuntimeCallingConvention calling_convention;
2509    locations->SetInAt(0, Location::RegisterLocation(calling_convention.GetRegisterAt(0)));
2510    locations->SetInAt(1, Location::RegisterLocation(calling_convention.GetRegisterAt(1)));
2511    locations->SetInAt(2, Location::RegisterLocation(calling_convention.GetRegisterAt(2)));
2512  } else {
2513    locations->SetInAt(0, Location::RequiresRegister());
2514    locations->SetInAt(1, Location::RegisterOrConstant(instruction->InputAt(1)));
2515    locations->SetInAt(2, Location::RequiresRegister());
2516
2517    if (needs_write_barrier) {
2518      // Temporary registers for the write barrier.
2519      locations->AddTemp(Location::RequiresRegister());
2520      locations->AddTemp(Location::RequiresRegister());
2521    }
2522  }
2523}
2524
2525void InstructionCodeGeneratorARM::VisitArraySet(HArraySet* instruction) {
2526  LocationSummary* locations = instruction->GetLocations();
2527  Register obj = locations->InAt(0).As<Register>();
2528  Location index = locations->InAt(1);
2529  Primitive::Type value_type = instruction->GetComponentType();
2530  bool needs_runtime_call = locations->WillCall();
2531  bool needs_write_barrier =
2532      CodeGenerator::StoreNeedsWriteBarrier(value_type, instruction->GetValue());
2533
2534  switch (value_type) {
2535    case Primitive::kPrimBoolean:
2536    case Primitive::kPrimByte: {
2537      uint32_t data_offset = mirror::Array::DataOffset(sizeof(uint8_t)).Uint32Value();
2538      Register value = locations->InAt(2).As<Register>();
2539      if (index.IsConstant()) {
2540        size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_1) + data_offset;
2541        __ StoreToOffset(kStoreByte, value, obj, offset);
2542      } else {
2543        __ add(IP, obj, ShifterOperand(index.As<Register>()));
2544        __ StoreToOffset(kStoreByte, value, IP, data_offset);
2545      }
2546      break;
2547    }
2548
2549    case Primitive::kPrimShort:
2550    case Primitive::kPrimChar: {
2551      uint32_t data_offset = mirror::Array::DataOffset(sizeof(uint16_t)).Uint32Value();
2552      Register value = locations->InAt(2).As<Register>();
2553      if (index.IsConstant()) {
2554        size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_2) + data_offset;
2555        __ StoreToOffset(kStoreHalfword, value, obj, offset);
2556      } else {
2557        __ add(IP, obj, ShifterOperand(index.As<Register>(), LSL, TIMES_2));
2558        __ StoreToOffset(kStoreHalfword, value, IP, data_offset);
2559      }
2560      break;
2561    }
2562
2563    case Primitive::kPrimInt:
2564    case Primitive::kPrimNot: {
2565      if (!needs_runtime_call) {
2566        uint32_t data_offset = mirror::Array::DataOffset(sizeof(int32_t)).Uint32Value();
2567        Register value = locations->InAt(2).As<Register>();
2568        if (index.IsConstant()) {
2569          size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_4) + data_offset;
2570          __ StoreToOffset(kStoreWord, value, obj, offset);
2571        } else {
2572          DCHECK(index.IsRegister()) << index;
2573          __ add(IP, obj, ShifterOperand(index.As<Register>(), LSL, TIMES_4));
2574          __ StoreToOffset(kStoreWord, value, IP, data_offset);
2575        }
2576        if (needs_write_barrier) {
2577          DCHECK_EQ(value_type, Primitive::kPrimNot);
2578          Register temp = locations->GetTemp(0).As<Register>();
2579          Register card = locations->GetTemp(1).As<Register>();
2580          codegen_->MarkGCCard(temp, card, obj, value);
2581        }
2582      } else {
2583        DCHECK_EQ(value_type, Primitive::kPrimNot);
2584        codegen_->InvokeRuntime(QUICK_ENTRY_POINT(pAputObject), instruction, instruction->GetDexPc());
2585      }
2586      break;
2587    }
2588
2589    case Primitive::kPrimLong: {
2590      uint32_t data_offset = mirror::Array::DataOffset(sizeof(int64_t)).Uint32Value();
2591      Location value = locations->InAt(2);
2592      if (index.IsConstant()) {
2593        size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_8) + data_offset;
2594        __ StoreToOffset(kStoreWordPair, value.AsRegisterPairLow<Register>(), obj, offset);
2595      } else {
2596        __ add(IP, obj, ShifterOperand(index.As<Register>(), LSL, TIMES_8));
2597        __ StoreToOffset(kStoreWordPair, value.AsRegisterPairLow<Register>(), IP, data_offset);
2598      }
2599      break;
2600    }
2601
2602    case Primitive::kPrimFloat:
2603    case Primitive::kPrimDouble:
2604      LOG(FATAL) << "Unimplemented register type " << instruction->GetType();
2605      UNREACHABLE();
2606    case Primitive::kPrimVoid:
2607      LOG(FATAL) << "Unreachable type " << instruction->GetType();
2608      UNREACHABLE();
2609  }
2610}
2611
2612void LocationsBuilderARM::VisitArrayLength(HArrayLength* instruction) {
2613  LocationSummary* locations =
2614      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2615  locations->SetInAt(0, Location::RequiresRegister());
2616  locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
2617}
2618
2619void InstructionCodeGeneratorARM::VisitArrayLength(HArrayLength* instruction) {
2620  LocationSummary* locations = instruction->GetLocations();
2621  uint32_t offset = mirror::Array::LengthOffset().Uint32Value();
2622  Register obj = locations->InAt(0).As<Register>();
2623  Register out = locations->Out().As<Register>();
2624  __ LoadFromOffset(kLoadWord, out, obj, offset);
2625}
2626
2627void LocationsBuilderARM::VisitBoundsCheck(HBoundsCheck* instruction) {
2628  LocationSummary* locations =
2629      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2630  locations->SetInAt(0, Location::RequiresRegister());
2631  locations->SetInAt(1, Location::RequiresRegister());
2632  if (instruction->HasUses()) {
2633    locations->SetOut(Location::SameAsFirstInput());
2634  }
2635}
2636
2637void InstructionCodeGeneratorARM::VisitBoundsCheck(HBoundsCheck* instruction) {
2638  LocationSummary* locations = instruction->GetLocations();
2639  SlowPathCodeARM* slow_path = new (GetGraph()->GetArena()) BoundsCheckSlowPathARM(
2640      instruction, locations->InAt(0), locations->InAt(1));
2641  codegen_->AddSlowPath(slow_path);
2642
2643  Register index = locations->InAt(0).As<Register>();
2644  Register length = locations->InAt(1).As<Register>();
2645
2646  __ cmp(index, ShifterOperand(length));
2647  __ b(slow_path->GetEntryLabel(), CS);
2648}
2649
2650void CodeGeneratorARM::MarkGCCard(Register temp, Register card, Register object, Register value) {
2651  Label is_null;
2652  __ CompareAndBranchIfZero(value, &is_null);
2653  __ LoadFromOffset(kLoadWord, card, TR, Thread::CardTableOffset<kArmWordSize>().Int32Value());
2654  __ Lsr(temp, object, gc::accounting::CardTable::kCardShift);
2655  __ strb(card, Address(card, temp));
2656  __ Bind(&is_null);
2657}
2658
2659void LocationsBuilderARM::VisitTemporary(HTemporary* temp) {
2660  temp->SetLocations(nullptr);
2661}
2662
2663void InstructionCodeGeneratorARM::VisitTemporary(HTemporary* temp) {
2664  // Nothing to do, this is driven by the code generator.
2665  UNUSED(temp);
2666}
2667
2668void LocationsBuilderARM::VisitParallelMove(HParallelMove* instruction) {
2669  UNUSED(instruction);
2670  LOG(FATAL) << "Unreachable";
2671}
2672
2673void InstructionCodeGeneratorARM::VisitParallelMove(HParallelMove* instruction) {
2674  codegen_->GetMoveResolver()->EmitNativeCode(instruction);
2675}
2676
2677void LocationsBuilderARM::VisitSuspendCheck(HSuspendCheck* instruction) {
2678  new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kCallOnSlowPath);
2679}
2680
2681void InstructionCodeGeneratorARM::VisitSuspendCheck(HSuspendCheck* instruction) {
2682  HBasicBlock* block = instruction->GetBlock();
2683  if (block->GetLoopInformation() != nullptr) {
2684    DCHECK(block->GetLoopInformation()->GetSuspendCheck() == instruction);
2685    // The back edge will generate the suspend check.
2686    return;
2687  }
2688  if (block->IsEntryBlock() && instruction->GetNext()->IsGoto()) {
2689    // The goto will generate the suspend check.
2690    return;
2691  }
2692  GenerateSuspendCheck(instruction, nullptr);
2693}
2694
2695void InstructionCodeGeneratorARM::GenerateSuspendCheck(HSuspendCheck* instruction,
2696                                                       HBasicBlock* successor) {
2697  SuspendCheckSlowPathARM* slow_path =
2698      new (GetGraph()->GetArena()) SuspendCheckSlowPathARM(instruction, successor);
2699  codegen_->AddSlowPath(slow_path);
2700
2701  __ LoadFromOffset(
2702      kLoadUnsignedHalfword, IP, TR, Thread::ThreadFlagsOffset<kArmWordSize>().Int32Value());
2703  __ cmp(IP, ShifterOperand(0));
2704  // TODO: Figure out the branch offsets and use cbz/cbnz.
2705  if (successor == nullptr) {
2706    __ b(slow_path->GetEntryLabel(), NE);
2707    __ Bind(slow_path->GetReturnLabel());
2708  } else {
2709    __ b(codegen_->GetLabelOf(successor), EQ);
2710    __ b(slow_path->GetEntryLabel());
2711  }
2712}
2713
2714ArmAssembler* ParallelMoveResolverARM::GetAssembler() const {
2715  return codegen_->GetAssembler();
2716}
2717
2718void ParallelMoveResolverARM::EmitMove(size_t index) {
2719  MoveOperands* move = moves_.Get(index);
2720  Location source = move->GetSource();
2721  Location destination = move->GetDestination();
2722
2723  if (source.IsRegister()) {
2724    if (destination.IsRegister()) {
2725      __ Mov(destination.As<Register>(), source.As<Register>());
2726    } else {
2727      DCHECK(destination.IsStackSlot());
2728      __ StoreToOffset(kStoreWord, source.As<Register>(),
2729                       SP, destination.GetStackIndex());
2730    }
2731  } else if (source.IsStackSlot()) {
2732    if (destination.IsRegister()) {
2733      __ LoadFromOffset(kLoadWord, destination.As<Register>(),
2734                        SP, source.GetStackIndex());
2735    } else {
2736      DCHECK(destination.IsStackSlot());
2737      __ LoadFromOffset(kLoadWord, IP, SP, source.GetStackIndex());
2738      __ StoreToOffset(kStoreWord, IP, SP, destination.GetStackIndex());
2739    }
2740  } else {
2741    DCHECK(source.IsConstant());
2742    DCHECK(source.GetConstant()->IsIntConstant());
2743    int32_t value = source.GetConstant()->AsIntConstant()->GetValue();
2744    if (destination.IsRegister()) {
2745      __ LoadImmediate(destination.As<Register>(), value);
2746    } else {
2747      DCHECK(destination.IsStackSlot());
2748      __ LoadImmediate(IP, value);
2749      __ StoreToOffset(kStoreWord, IP, SP, destination.GetStackIndex());
2750    }
2751  }
2752}
2753
2754void ParallelMoveResolverARM::Exchange(Register reg, int mem) {
2755  __ Mov(IP, reg);
2756  __ LoadFromOffset(kLoadWord, reg, SP, mem);
2757  __ StoreToOffset(kStoreWord, IP, SP, mem);
2758}
2759
2760void ParallelMoveResolverARM::Exchange(int mem1, int mem2) {
2761  ScratchRegisterScope ensure_scratch(this, IP, R0, codegen_->GetNumberOfCoreRegisters());
2762  int stack_offset = ensure_scratch.IsSpilled() ? kArmWordSize : 0;
2763  __ LoadFromOffset(kLoadWord, static_cast<Register>(ensure_scratch.GetRegister()),
2764                    SP, mem1 + stack_offset);
2765  __ LoadFromOffset(kLoadWord, IP, SP, mem2 + stack_offset);
2766  __ StoreToOffset(kStoreWord, static_cast<Register>(ensure_scratch.GetRegister()),
2767                   SP, mem2 + stack_offset);
2768  __ StoreToOffset(kStoreWord, IP, SP, mem1 + stack_offset);
2769}
2770
2771void ParallelMoveResolverARM::EmitSwap(size_t index) {
2772  MoveOperands* move = moves_.Get(index);
2773  Location source = move->GetSource();
2774  Location destination = move->GetDestination();
2775
2776  if (source.IsRegister() && destination.IsRegister()) {
2777    DCHECK_NE(source.As<Register>(), IP);
2778    DCHECK_NE(destination.As<Register>(), IP);
2779    __ Mov(IP, source.As<Register>());
2780    __ Mov(source.As<Register>(), destination.As<Register>());
2781    __ Mov(destination.As<Register>(), IP);
2782  } else if (source.IsRegister() && destination.IsStackSlot()) {
2783    Exchange(source.As<Register>(), destination.GetStackIndex());
2784  } else if (source.IsStackSlot() && destination.IsRegister()) {
2785    Exchange(destination.As<Register>(), source.GetStackIndex());
2786  } else if (source.IsStackSlot() && destination.IsStackSlot()) {
2787    Exchange(source.GetStackIndex(), destination.GetStackIndex());
2788  } else {
2789    LOG(FATAL) << "Unimplemented";
2790  }
2791}
2792
2793void ParallelMoveResolverARM::SpillScratch(int reg) {
2794  __ Push(static_cast<Register>(reg));
2795}
2796
2797void ParallelMoveResolverARM::RestoreScratch(int reg) {
2798  __ Pop(static_cast<Register>(reg));
2799}
2800
2801void LocationsBuilderARM::VisitLoadClass(HLoadClass* cls) {
2802  LocationSummary::CallKind call_kind = cls->CanCallRuntime()
2803      ? LocationSummary::kCallOnSlowPath
2804      : LocationSummary::kNoCall;
2805  LocationSummary* locations =
2806      new (GetGraph()->GetArena()) LocationSummary(cls, call_kind);
2807  locations->SetOut(Location::RequiresRegister());
2808}
2809
2810void InstructionCodeGeneratorARM::VisitLoadClass(HLoadClass* cls) {
2811  Register out = cls->GetLocations()->Out().As<Register>();
2812  if (cls->IsReferrersClass()) {
2813    DCHECK(!cls->CanCallRuntime());
2814    DCHECK(!cls->MustGenerateClinitCheck());
2815    codegen_->LoadCurrentMethod(out);
2816    __ LoadFromOffset(kLoadWord, out, out, mirror::ArtMethod::DeclaringClassOffset().Int32Value());
2817  } else {
2818    DCHECK(cls->CanCallRuntime());
2819    codegen_->LoadCurrentMethod(out);
2820    __ LoadFromOffset(
2821        kLoadWord, out, out, mirror::ArtMethod::DexCacheResolvedTypesOffset().Int32Value());
2822    __ LoadFromOffset(kLoadWord, out, out, CodeGenerator::GetCacheOffset(cls->GetTypeIndex()));
2823
2824    SlowPathCodeARM* slow_path = new (GetGraph()->GetArena()) LoadClassSlowPathARM(
2825        cls, cls, cls->GetDexPc(), cls->MustGenerateClinitCheck());
2826    codegen_->AddSlowPath(slow_path);
2827    __ cmp(out, ShifterOperand(0));
2828    __ b(slow_path->GetEntryLabel(), EQ);
2829    if (cls->MustGenerateClinitCheck()) {
2830      GenerateClassInitializationCheck(slow_path, out);
2831    } else {
2832      __ Bind(slow_path->GetExitLabel());
2833    }
2834  }
2835}
2836
2837void LocationsBuilderARM::VisitClinitCheck(HClinitCheck* check) {
2838  LocationSummary* locations =
2839      new (GetGraph()->GetArena()) LocationSummary(check, LocationSummary::kCallOnSlowPath);
2840  locations->SetInAt(0, Location::RequiresRegister());
2841  if (check->HasUses()) {
2842    locations->SetOut(Location::SameAsFirstInput());
2843  }
2844}
2845
2846void InstructionCodeGeneratorARM::VisitClinitCheck(HClinitCheck* check) {
2847  // We assume the class is not null.
2848  SlowPathCodeARM* slow_path = new (GetGraph()->GetArena()) LoadClassSlowPathARM(
2849      check->GetLoadClass(), check, check->GetDexPc(), true);
2850  codegen_->AddSlowPath(slow_path);
2851  GenerateClassInitializationCheck(slow_path, check->GetLocations()->InAt(0).As<Register>());
2852}
2853
2854void InstructionCodeGeneratorARM::GenerateClassInitializationCheck(
2855    SlowPathCodeARM* slow_path, Register class_reg) {
2856  __ LoadFromOffset(kLoadWord, IP, class_reg, mirror::Class::StatusOffset().Int32Value());
2857  __ cmp(IP, ShifterOperand(mirror::Class::kStatusInitialized));
2858  __ b(slow_path->GetEntryLabel(), LT);
2859  // Even if the initialized flag is set, we may be in a situation where caches are not synced
2860  // properly. Therefore, we do a memory fence.
2861  __ dmb(ISH);
2862  __ Bind(slow_path->GetExitLabel());
2863}
2864
2865void LocationsBuilderARM::VisitStaticFieldGet(HStaticFieldGet* instruction) {
2866  LocationSummary* locations =
2867      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2868  locations->SetInAt(0, Location::RequiresRegister());
2869  locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
2870}
2871
2872void InstructionCodeGeneratorARM::VisitStaticFieldGet(HStaticFieldGet* instruction) {
2873  LocationSummary* locations = instruction->GetLocations();
2874  Register cls = locations->InAt(0).As<Register>();
2875  uint32_t offset = instruction->GetFieldOffset().Uint32Value();
2876
2877  switch (instruction->GetType()) {
2878    case Primitive::kPrimBoolean: {
2879      Register out = locations->Out().As<Register>();
2880      __ LoadFromOffset(kLoadUnsignedByte, out, cls, offset);
2881      break;
2882    }
2883
2884    case Primitive::kPrimByte: {
2885      Register out = locations->Out().As<Register>();
2886      __ LoadFromOffset(kLoadSignedByte, out, cls, offset);
2887      break;
2888    }
2889
2890    case Primitive::kPrimShort: {
2891      Register out = locations->Out().As<Register>();
2892      __ LoadFromOffset(kLoadSignedHalfword, out, cls, offset);
2893      break;
2894    }
2895
2896    case Primitive::kPrimChar: {
2897      Register out = locations->Out().As<Register>();
2898      __ LoadFromOffset(kLoadUnsignedHalfword, out, cls, offset);
2899      break;
2900    }
2901
2902    case Primitive::kPrimInt:
2903    case Primitive::kPrimNot: {
2904      Register out = locations->Out().As<Register>();
2905      __ LoadFromOffset(kLoadWord, out, cls, offset);
2906      break;
2907    }
2908
2909    case Primitive::kPrimLong: {
2910      // TODO: support volatile.
2911      Location out = locations->Out();
2912      __ LoadFromOffset(kLoadWordPair, out.AsRegisterPairLow<Register>(), cls, offset);
2913      break;
2914    }
2915
2916    case Primitive::kPrimFloat: {
2917      SRegister out = locations->Out().As<SRegister>();
2918      __ LoadSFromOffset(out, cls, offset);
2919      break;
2920    }
2921
2922    case Primitive::kPrimDouble: {
2923      DRegister out = FromLowSToD(locations->Out().AsFpuRegisterPairLow<SRegister>());
2924      __ LoadDFromOffset(out, cls, offset);
2925      break;
2926    }
2927
2928    case Primitive::kPrimVoid:
2929      LOG(FATAL) << "Unreachable type " << instruction->GetType();
2930      UNREACHABLE();
2931  }
2932}
2933
2934void LocationsBuilderARM::VisitStaticFieldSet(HStaticFieldSet* instruction) {
2935  LocationSummary* locations =
2936      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2937  bool needs_write_barrier =
2938      CodeGenerator::StoreNeedsWriteBarrier(instruction->GetFieldType(), instruction->GetValue());
2939  locations->SetInAt(0, Location::RequiresRegister());
2940  locations->SetInAt(1, Location::RequiresRegister());
2941  // Temporary registers for the write barrier.
2942  if (needs_write_barrier) {
2943    locations->AddTemp(Location::RequiresRegister());
2944    locations->AddTemp(Location::RequiresRegister());
2945  }
2946}
2947
2948void InstructionCodeGeneratorARM::VisitStaticFieldSet(HStaticFieldSet* instruction) {
2949  LocationSummary* locations = instruction->GetLocations();
2950  Register cls = locations->InAt(0).As<Register>();
2951  uint32_t offset = instruction->GetFieldOffset().Uint32Value();
2952  Primitive::Type field_type = instruction->GetFieldType();
2953
2954  switch (field_type) {
2955    case Primitive::kPrimBoolean:
2956    case Primitive::kPrimByte: {
2957      Register value = locations->InAt(1).As<Register>();
2958      __ StoreToOffset(kStoreByte, value, cls, offset);
2959      break;
2960    }
2961
2962    case Primitive::kPrimShort:
2963    case Primitive::kPrimChar: {
2964      Register value = locations->InAt(1).As<Register>();
2965      __ StoreToOffset(kStoreHalfword, value, cls, offset);
2966      break;
2967    }
2968
2969    case Primitive::kPrimInt:
2970    case Primitive::kPrimNot: {
2971      Register value = locations->InAt(1).As<Register>();
2972      __ StoreToOffset(kStoreWord, value, cls, offset);
2973      if (CodeGenerator::StoreNeedsWriteBarrier(field_type, instruction->GetValue())) {
2974        Register temp = locations->GetTemp(0).As<Register>();
2975        Register card = locations->GetTemp(1).As<Register>();
2976        codegen_->MarkGCCard(temp, card, cls, value);
2977      }
2978      break;
2979    }
2980
2981    case Primitive::kPrimLong: {
2982      Location value = locations->InAt(1);
2983      __ StoreToOffset(kStoreWordPair, value.AsRegisterPairLow<Register>(), cls, offset);
2984      break;
2985    }
2986
2987    case Primitive::kPrimFloat: {
2988      SRegister value = locations->InAt(1).As<SRegister>();
2989      __ StoreSToOffset(value, cls, offset);
2990      break;
2991    }
2992
2993    case Primitive::kPrimDouble: {
2994      DRegister value = FromLowSToD(locations->InAt(1).AsFpuRegisterPairLow<SRegister>());
2995      __ StoreDToOffset(value, cls, offset);
2996      break;
2997    }
2998
2999    case Primitive::kPrimVoid:
3000      LOG(FATAL) << "Unreachable type " << field_type;
3001      UNREACHABLE();
3002  }
3003}
3004
3005void LocationsBuilderARM::VisitLoadString(HLoadString* load) {
3006  LocationSummary* locations =
3007      new (GetGraph()->GetArena()) LocationSummary(load, LocationSummary::kCallOnSlowPath);
3008  locations->SetOut(Location::RequiresRegister());
3009}
3010
3011void InstructionCodeGeneratorARM::VisitLoadString(HLoadString* load) {
3012  SlowPathCodeARM* slow_path = new (GetGraph()->GetArena()) LoadStringSlowPathARM(load);
3013  codegen_->AddSlowPath(slow_path);
3014
3015  Register out = load->GetLocations()->Out().As<Register>();
3016  codegen_->LoadCurrentMethod(out);
3017  __ LoadFromOffset(
3018      kLoadWord, out, out, mirror::ArtMethod::DexCacheStringsOffset().Int32Value());
3019  __ LoadFromOffset(kLoadWord, out, out, CodeGenerator::GetCacheOffset(load->GetStringIndex()));
3020  __ cmp(out, ShifterOperand(0));
3021  __ b(slow_path->GetEntryLabel(), EQ);
3022  __ Bind(slow_path->GetExitLabel());
3023}
3024
3025void LocationsBuilderARM::VisitLoadException(HLoadException* load) {
3026  LocationSummary* locations =
3027      new (GetGraph()->GetArena()) LocationSummary(load, LocationSummary::kNoCall);
3028  locations->SetOut(Location::RequiresRegister());
3029}
3030
3031void InstructionCodeGeneratorARM::VisitLoadException(HLoadException* load) {
3032  Register out = load->GetLocations()->Out().As<Register>();
3033  int32_t offset = Thread::ExceptionOffset<kArmWordSize>().Int32Value();
3034  __ LoadFromOffset(kLoadWord, out, TR, offset);
3035  __ LoadImmediate(IP, 0);
3036  __ StoreToOffset(kStoreWord, IP, TR, offset);
3037}
3038
3039void LocationsBuilderARM::VisitThrow(HThrow* instruction) {
3040  LocationSummary* locations =
3041      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kCall);
3042  InvokeRuntimeCallingConvention calling_convention;
3043  locations->SetInAt(0, Location::RegisterLocation(calling_convention.GetRegisterAt(0)));
3044}
3045
3046void InstructionCodeGeneratorARM::VisitThrow(HThrow* instruction) {
3047  codegen_->InvokeRuntime(
3048      QUICK_ENTRY_POINT(pDeliverException), instruction, instruction->GetDexPc());
3049}
3050
3051void LocationsBuilderARM::VisitInstanceOf(HInstanceOf* instruction) {
3052  LocationSummary::CallKind call_kind = instruction->IsClassFinal()
3053      ? LocationSummary::kNoCall
3054      : LocationSummary::kCallOnSlowPath;
3055  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instruction, call_kind);
3056  locations->SetInAt(0, Location::RequiresRegister());
3057  locations->SetInAt(1, Location::RequiresRegister());
3058  locations->SetOut(Location::RequiresRegister());
3059}
3060
3061void InstructionCodeGeneratorARM::VisitInstanceOf(HInstanceOf* instruction) {
3062  LocationSummary* locations = instruction->GetLocations();
3063  Register obj = locations->InAt(0).As<Register>();
3064  Register cls = locations->InAt(1).As<Register>();
3065  Register out = locations->Out().As<Register>();
3066  uint32_t class_offset = mirror::Object::ClassOffset().Int32Value();
3067  Label done, zero;
3068  SlowPathCodeARM* slow_path = nullptr;
3069
3070  // Return 0 if `obj` is null.
3071  // TODO: avoid this check if we know obj is not null.
3072  __ cmp(obj, ShifterOperand(0));
3073  __ b(&zero, EQ);
3074  // Compare the class of `obj` with `cls`.
3075  __ LoadFromOffset(kLoadWord, out, obj, class_offset);
3076  __ cmp(out, ShifterOperand(cls));
3077  if (instruction->IsClassFinal()) {
3078    // Classes must be equal for the instanceof to succeed.
3079    __ b(&zero, NE);
3080    __ LoadImmediate(out, 1);
3081    __ b(&done);
3082  } else {
3083    // If the classes are not equal, we go into a slow path.
3084    DCHECK(locations->OnlyCallsOnSlowPath());
3085    slow_path = new (GetGraph()->GetArena()) TypeCheckSlowPathARM(
3086        instruction, locations->InAt(1), locations->Out(), instruction->GetDexPc());
3087    codegen_->AddSlowPath(slow_path);
3088    __ b(slow_path->GetEntryLabel(), NE);
3089    __ LoadImmediate(out, 1);
3090    __ b(&done);
3091  }
3092  __ Bind(&zero);
3093  __ LoadImmediate(out, 0);
3094  if (slow_path != nullptr) {
3095    __ Bind(slow_path->GetExitLabel());
3096  }
3097  __ Bind(&done);
3098}
3099
3100void LocationsBuilderARM::VisitCheckCast(HCheckCast* instruction) {
3101  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(
3102      instruction, LocationSummary::kCallOnSlowPath);
3103  locations->SetInAt(0, Location::RequiresRegister());
3104  locations->SetInAt(1, Location::RequiresRegister());
3105  locations->AddTemp(Location::RequiresRegister());
3106}
3107
3108void InstructionCodeGeneratorARM::VisitCheckCast(HCheckCast* instruction) {
3109  LocationSummary* locations = instruction->GetLocations();
3110  Register obj = locations->InAt(0).As<Register>();
3111  Register cls = locations->InAt(1).As<Register>();
3112  Register temp = locations->GetTemp(0).As<Register>();
3113  uint32_t class_offset = mirror::Object::ClassOffset().Int32Value();
3114
3115  SlowPathCodeARM* slow_path = new (GetGraph()->GetArena()) TypeCheckSlowPathARM(
3116      instruction, locations->InAt(1), locations->GetTemp(0), instruction->GetDexPc());
3117  codegen_->AddSlowPath(slow_path);
3118
3119  // TODO: avoid this check if we know obj is not null.
3120  __ cmp(obj, ShifterOperand(0));
3121  __ b(slow_path->GetExitLabel(), EQ);
3122  // Compare the class of `obj` with `cls`.
3123  __ LoadFromOffset(kLoadWord, temp, obj, class_offset);
3124  __ cmp(temp, ShifterOperand(cls));
3125  __ b(slow_path->GetEntryLabel(), NE);
3126  __ Bind(slow_path->GetExitLabel());
3127}
3128
3129void LocationsBuilderARM::VisitMonitorOperation(HMonitorOperation* instruction) {
3130  LocationSummary* locations =
3131      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kCall);
3132  InvokeRuntimeCallingConvention calling_convention;
3133  locations->SetInAt(0, Location::RegisterLocation(calling_convention.GetRegisterAt(0)));
3134}
3135
3136void InstructionCodeGeneratorARM::VisitMonitorOperation(HMonitorOperation* instruction) {
3137  codegen_->InvokeRuntime(instruction->IsEnter()
3138        ? QUICK_ENTRY_POINT(pLockObject) : QUICK_ENTRY_POINT(pUnlockObject),
3139      instruction,
3140      instruction->GetDexPc());
3141}
3142
3143void LocationsBuilderARM::VisitAnd(HAnd* instruction) { HandleBitwiseOperation(instruction); }
3144void LocationsBuilderARM::VisitOr(HOr* instruction) { HandleBitwiseOperation(instruction); }
3145void LocationsBuilderARM::VisitXor(HXor* instruction) { HandleBitwiseOperation(instruction); }
3146
3147void LocationsBuilderARM::HandleBitwiseOperation(HBinaryOperation* instruction) {
3148  LocationSummary* locations =
3149      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
3150  DCHECK(instruction->GetResultType() == Primitive::kPrimInt
3151         || instruction->GetResultType() == Primitive::kPrimLong);
3152  locations->SetInAt(0, Location::RequiresRegister());
3153  locations->SetInAt(1, Location::RequiresRegister());
3154  bool output_overlaps = (instruction->GetResultType() == Primitive::kPrimLong);
3155  locations->SetOut(Location::RequiresRegister(), output_overlaps);
3156}
3157
3158void InstructionCodeGeneratorARM::VisitAnd(HAnd* instruction) {
3159  HandleBitwiseOperation(instruction);
3160}
3161
3162void InstructionCodeGeneratorARM::VisitOr(HOr* instruction) {
3163  HandleBitwiseOperation(instruction);
3164}
3165
3166void InstructionCodeGeneratorARM::VisitXor(HXor* instruction) {
3167  HandleBitwiseOperation(instruction);
3168}
3169
3170void InstructionCodeGeneratorARM::HandleBitwiseOperation(HBinaryOperation* instruction) {
3171  LocationSummary* locations = instruction->GetLocations();
3172
3173  if (instruction->GetResultType() == Primitive::kPrimInt) {
3174    Register first = locations->InAt(0).As<Register>();
3175    Register second = locations->InAt(1).As<Register>();
3176    Register out = locations->Out().As<Register>();
3177    if (instruction->IsAnd()) {
3178      __ and_(out, first, ShifterOperand(second));
3179    } else if (instruction->IsOr()) {
3180      __ orr(out, first, ShifterOperand(second));
3181    } else {
3182      DCHECK(instruction->IsXor());
3183      __ eor(out, first, ShifterOperand(second));
3184    }
3185  } else {
3186    DCHECK_EQ(instruction->GetResultType(), Primitive::kPrimLong);
3187    Location first = locations->InAt(0);
3188    Location second = locations->InAt(1);
3189    Location out = locations->Out();
3190    if (instruction->IsAnd()) {
3191      __ and_(out.AsRegisterPairLow<Register>(),
3192              first.AsRegisterPairLow<Register>(),
3193              ShifterOperand(second.AsRegisterPairLow<Register>()));
3194      __ and_(out.AsRegisterPairHigh<Register>(),
3195              first.AsRegisterPairHigh<Register>(),
3196              ShifterOperand(second.AsRegisterPairHigh<Register>()));
3197    } else if (instruction->IsOr()) {
3198      __ orr(out.AsRegisterPairLow<Register>(),
3199             first.AsRegisterPairLow<Register>(),
3200             ShifterOperand(second.AsRegisterPairLow<Register>()));
3201      __ orr(out.AsRegisterPairHigh<Register>(),
3202             first.AsRegisterPairHigh<Register>(),
3203             ShifterOperand(second.AsRegisterPairHigh<Register>()));
3204    } else {
3205      DCHECK(instruction->IsXor());
3206      __ eor(out.AsRegisterPairLow<Register>(),
3207             first.AsRegisterPairLow<Register>(),
3208             ShifterOperand(second.AsRegisterPairLow<Register>()));
3209      __ eor(out.AsRegisterPairHigh<Register>(),
3210             first.AsRegisterPairHigh<Register>(),
3211             ShifterOperand(second.AsRegisterPairHigh<Register>()));
3212    }
3213  }
3214}
3215
3216}  // namespace arm
3217}  // namespace art
3218