code_generator_arm.cc revision 86a8d7afc7f00ff0f5ea7b8aaf4d50514250a4e6 
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  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  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  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  SuspendCheckSlowPathARM(HSuspendCheck* instruction, HBasicBlock* successor)
128      : instruction_(instruction), successor_(successor) {}
129
130  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  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  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  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  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(
1192                         kArmWordSize).Int32Value());
1193  // LR()
1194  __ blx(LR);
1195
1196  codegen_->RecordPcInfo(invoke, invoke->GetDexPc());
1197  DCHECK(!codegen_->IsLeafMethod());
1198}
1199
1200void LocationsBuilderARM::HandleInvoke(HInvoke* invoke) {
1201  LocationSummary* locations =
1202      new (GetGraph()->GetArena()) LocationSummary(invoke, LocationSummary::kCall);
1203  locations->AddTemp(Location::RegisterLocation(R0));
1204
1205  InvokeDexCallingConventionVisitor calling_convention_visitor;
1206  for (size_t i = 0; i < invoke->InputCount(); i++) {
1207    HInstruction* input = invoke->InputAt(i);
1208    locations->SetInAt(i, calling_convention_visitor.GetNextLocation(input->GetType()));
1209  }
1210
1211  locations->SetOut(calling_convention_visitor.GetReturnLocation(invoke->GetType()));
1212}
1213
1214void LocationsBuilderARM::VisitInvokeVirtual(HInvokeVirtual* invoke) {
1215  HandleInvoke(invoke);
1216}
1217
1218void InstructionCodeGeneratorARM::VisitInvokeVirtual(HInvokeVirtual* invoke) {
1219  Register temp = invoke->GetLocations()->GetTemp(0).As<Register>();
1220  uint32_t method_offset = mirror::Class::EmbeddedVTableOffset().Uint32Value() +
1221          invoke->GetVTableIndex() * sizeof(mirror::Class::VTableEntry);
1222  LocationSummary* locations = invoke->GetLocations();
1223  Location receiver = locations->InAt(0);
1224  uint32_t class_offset = mirror::Object::ClassOffset().Int32Value();
1225  // temp = object->GetClass();
1226  if (receiver.IsStackSlot()) {
1227    __ LoadFromOffset(kLoadWord, temp, SP, receiver.GetStackIndex());
1228    __ LoadFromOffset(kLoadWord, temp, temp, class_offset);
1229  } else {
1230    __ LoadFromOffset(kLoadWord, temp, receiver.As<Register>(), class_offset);
1231  }
1232  // temp = temp->GetMethodAt(method_offset);
1233  uint32_t entry_point = mirror::ArtMethod::EntryPointFromQuickCompiledCodeOffset(
1234      kArmWordSize).Int32Value();
1235  __ LoadFromOffset(kLoadWord, temp, temp, method_offset);
1236  // LR = temp->GetEntryPoint();
1237  __ LoadFromOffset(kLoadWord, LR, temp, entry_point);
1238  // LR();
1239  __ blx(LR);
1240  DCHECK(!codegen_->IsLeafMethod());
1241  codegen_->RecordPcInfo(invoke, invoke->GetDexPc());
1242}
1243
1244void LocationsBuilderARM::VisitInvokeInterface(HInvokeInterface* invoke) {
1245  HandleInvoke(invoke);
1246  // Add the hidden argument.
1247  invoke->GetLocations()->AddTemp(Location::RegisterLocation(R12));
1248}
1249
1250void InstructionCodeGeneratorARM::VisitInvokeInterface(HInvokeInterface* invoke) {
1251  // TODO: b/18116999, our IMTs can miss an IncompatibleClassChangeError.
1252  Register temp = invoke->GetLocations()->GetTemp(0).As<Register>();
1253  uint32_t method_offset = mirror::Class::EmbeddedImTableOffset().Uint32Value() +
1254          (invoke->GetImtIndex() % mirror::Class::kImtSize) * sizeof(mirror::Class::ImTableEntry);
1255  LocationSummary* locations = invoke->GetLocations();
1256  Location receiver = locations->InAt(0);
1257  uint32_t class_offset = mirror::Object::ClassOffset().Int32Value();
1258
1259  // Set the hidden argument.
1260  __ LoadImmediate(invoke->GetLocations()->GetTemp(1).As<Register>(), invoke->GetDexMethodIndex());
1261
1262  // temp = object->GetClass();
1263  if (receiver.IsStackSlot()) {
1264    __ LoadFromOffset(kLoadWord, temp, SP, receiver.GetStackIndex());
1265    __ LoadFromOffset(kLoadWord, temp, temp, class_offset);
1266  } else {
1267    __ LoadFromOffset(kLoadWord, temp, receiver.As<Register>(), class_offset);
1268  }
1269  // temp = temp->GetImtEntryAt(method_offset);
1270  uint32_t entry_point = mirror::ArtMethod::EntryPointFromQuickCompiledCodeOffset(
1271      kArmWordSize).Int32Value();
1272  __ LoadFromOffset(kLoadWord, temp, temp, method_offset);
1273  // LR = temp->GetEntryPoint();
1274  __ LoadFromOffset(kLoadWord, LR, temp, entry_point);
1275  // LR();
1276  __ blx(LR);
1277  DCHECK(!codegen_->IsLeafMethod());
1278  codegen_->RecordPcInfo(invoke, invoke->GetDexPc());
1279}
1280
1281void LocationsBuilderARM::VisitNeg(HNeg* neg) {
1282  LocationSummary* locations =
1283      new (GetGraph()->GetArena()) LocationSummary(neg, LocationSummary::kNoCall);
1284  switch (neg->GetResultType()) {
1285    case Primitive::kPrimInt:
1286    case Primitive::kPrimLong: {
1287      bool output_overlaps = (neg->GetResultType() == Primitive::kPrimLong);
1288      locations->SetInAt(0, Location::RequiresRegister());
1289      locations->SetOut(Location::RequiresRegister(), output_overlaps);
1290      break;
1291    }
1292
1293    case Primitive::kPrimFloat:
1294    case Primitive::kPrimDouble:
1295      locations->SetInAt(0, Location::RequiresFpuRegister());
1296      locations->SetOut(Location::RequiresFpuRegister(), Location::kNoOutputOverlap);
1297      break;
1298
1299    default:
1300      LOG(FATAL) << "Unexpected neg type " << neg->GetResultType();
1301  }
1302}
1303
1304void InstructionCodeGeneratorARM::VisitNeg(HNeg* neg) {
1305  LocationSummary* locations = neg->GetLocations();
1306  Location out = locations->Out();
1307  Location in = locations->InAt(0);
1308  switch (neg->GetResultType()) {
1309    case Primitive::kPrimInt:
1310      DCHECK(in.IsRegister());
1311      __ rsb(out.As<Register>(), in.As<Register>(), ShifterOperand(0));
1312      break;
1313
1314    case Primitive::kPrimLong:
1315      DCHECK(in.IsRegisterPair());
1316      // out.lo = 0 - in.lo (and update the carry/borrow (C) flag)
1317      __ rsbs(out.AsRegisterPairLow<Register>(),
1318              in.AsRegisterPairLow<Register>(),
1319              ShifterOperand(0));
1320      // We cannot emit an RSC (Reverse Subtract with Carry)
1321      // instruction here, as it does not exist in the Thumb-2
1322      // instruction set.  We use the following approach
1323      // using SBC and SUB instead.
1324      //
1325      // out.hi = -C
1326      __ sbc(out.AsRegisterPairHigh<Register>(),
1327             out.AsRegisterPairHigh<Register>(),
1328             ShifterOperand(out.AsRegisterPairHigh<Register>()));
1329      // out.hi = out.hi - in.hi
1330      __ sub(out.AsRegisterPairHigh<Register>(),
1331             out.AsRegisterPairHigh<Register>(),
1332             ShifterOperand(in.AsRegisterPairHigh<Register>()));
1333      break;
1334
1335    case Primitive::kPrimFloat:
1336      DCHECK(in.IsFpuRegister());
1337      __ vnegs(out.As<SRegister>(), in.As<SRegister>());
1338      break;
1339
1340    case Primitive::kPrimDouble:
1341      DCHECK(in.IsFpuRegisterPair());
1342      __ vnegd(FromLowSToD(out.AsFpuRegisterPairLow<SRegister>()),
1343               FromLowSToD(in.AsFpuRegisterPairLow<SRegister>()));
1344      break;
1345
1346    default:
1347      LOG(FATAL) << "Unexpected neg type " << neg->GetResultType();
1348  }
1349}
1350
1351void LocationsBuilderARM::VisitTypeConversion(HTypeConversion* conversion) {
1352  LocationSummary* locations =
1353      new (GetGraph()->GetArena()) LocationSummary(conversion, LocationSummary::kNoCall);
1354  Primitive::Type result_type = conversion->GetResultType();
1355  Primitive::Type input_type = conversion->GetInputType();
1356  switch (result_type) {
1357    case Primitive::kPrimByte:
1358      switch (input_type) {
1359        case Primitive::kPrimShort:
1360        case Primitive::kPrimInt:
1361        case Primitive::kPrimChar:
1362          // Processing a Dex `int-to-byte' instruction.
1363          locations->SetInAt(0, Location::RequiresRegister());
1364          locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1365          break;
1366
1367        default:
1368          LOG(FATAL) << "Unexpected type conversion from " << input_type
1369                     << " to " << result_type;
1370      }
1371      break;
1372
1373    case Primitive::kPrimShort:
1374      switch (input_type) {
1375        case Primitive::kPrimByte:
1376        case Primitive::kPrimInt:
1377        case Primitive::kPrimChar:
1378          // Processing a Dex `int-to-short' instruction.
1379          locations->SetInAt(0, Location::RequiresRegister());
1380          locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1381          break;
1382
1383        default:
1384          LOG(FATAL) << "Unexpected type conversion from " << input_type
1385                     << " to " << result_type;
1386      }
1387      break;
1388
1389    case Primitive::kPrimInt:
1390      switch (input_type) {
1391        case Primitive::kPrimLong:
1392          // Processing a Dex `long-to-int' instruction.
1393          locations->SetInAt(0, Location::Any());
1394          locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1395          break;
1396
1397        case Primitive::kPrimFloat:
1398        case Primitive::kPrimDouble:
1399          LOG(FATAL) << "Type conversion from " << input_type
1400                     << " to " << result_type << " not yet implemented";
1401          break;
1402
1403        default:
1404          LOG(FATAL) << "Unexpected type conversion from " << input_type
1405                     << " to " << result_type;
1406      }
1407      break;
1408
1409    case Primitive::kPrimLong:
1410      switch (input_type) {
1411        case Primitive::kPrimByte:
1412        case Primitive::kPrimShort:
1413        case Primitive::kPrimInt:
1414        case Primitive::kPrimChar:
1415          // Processing a Dex `int-to-long' instruction.
1416          locations->SetInAt(0, Location::RequiresRegister());
1417          locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1418          break;
1419
1420        case Primitive::kPrimFloat:
1421        case Primitive::kPrimDouble:
1422          LOG(FATAL) << "Type conversion from " << input_type << " to "
1423                     << result_type << " not yet implemented";
1424          break;
1425
1426        default:
1427          LOG(FATAL) << "Unexpected type conversion from " << input_type
1428                     << " to " << result_type;
1429      }
1430      break;
1431
1432    case Primitive::kPrimChar:
1433      switch (input_type) {
1434        case Primitive::kPrimByte:
1435        case Primitive::kPrimShort:
1436        case Primitive::kPrimInt:
1437        case Primitive::kPrimChar:
1438          // Processing a Dex `int-to-char' instruction.
1439          locations->SetInAt(0, Location::RequiresRegister());
1440          locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1441          break;
1442
1443        default:
1444          LOG(FATAL) << "Unexpected type conversion from " << input_type
1445                     << " to " << result_type;
1446      }
1447      break;
1448
1449    case Primitive::kPrimFloat:
1450      switch (input_type) {
1451        case Primitive::kPrimByte:
1452        case Primitive::kPrimShort:
1453        case Primitive::kPrimInt:
1454        case Primitive::kPrimChar:
1455          // Processing a Dex `int-to-float' instruction.
1456          locations->SetInAt(0, Location::RequiresRegister());
1457          locations->SetOut(Location::RequiresFpuRegister());
1458          break;
1459
1460        case Primitive::kPrimLong:
1461        case Primitive::kPrimDouble:
1462          LOG(FATAL) << "Type conversion from " << input_type
1463                     << " to " << result_type << " not yet implemented";
1464          break;
1465
1466        default:
1467          LOG(FATAL) << "Unexpected type conversion from " << input_type
1468                     << " to " << result_type;
1469      };
1470      break;
1471
1472    case Primitive::kPrimDouble:
1473      switch (input_type) {
1474        case Primitive::kPrimByte:
1475        case Primitive::kPrimShort:
1476        case Primitive::kPrimInt:
1477        case Primitive::kPrimChar:
1478          // Processing a Dex `int-to-double' instruction.
1479          locations->SetInAt(0, Location::RequiresRegister());
1480          locations->SetOut(Location::RequiresFpuRegister());
1481          break;
1482
1483        case Primitive::kPrimLong:
1484        case Primitive::kPrimFloat:
1485          LOG(FATAL) << "Type conversion from " << input_type
1486                     << " to " << result_type << " not yet implemented";
1487          break;
1488
1489        default:
1490          LOG(FATAL) << "Unexpected type conversion from " << input_type
1491                     << " to " << result_type;
1492      };
1493      break;
1494
1495    default:
1496      LOG(FATAL) << "Unexpected type conversion from " << input_type
1497                 << " to " << result_type;
1498  }
1499}
1500
1501void InstructionCodeGeneratorARM::VisitTypeConversion(HTypeConversion* conversion) {
1502  LocationSummary* locations = conversion->GetLocations();
1503  Location out = locations->Out();
1504  Location in = locations->InAt(0);
1505  Primitive::Type result_type = conversion->GetResultType();
1506  Primitive::Type input_type = conversion->GetInputType();
1507  switch (result_type) {
1508    case Primitive::kPrimByte:
1509      switch (input_type) {
1510        case Primitive::kPrimShort:
1511        case Primitive::kPrimInt:
1512        case Primitive::kPrimChar:
1513          // Processing a Dex `int-to-byte' instruction.
1514          __ sbfx(out.As<Register>(), in.As<Register>(), 0, 8);
1515          break;
1516
1517        default:
1518          LOG(FATAL) << "Unexpected type conversion from " << input_type
1519                     << " to " << result_type;
1520      }
1521      break;
1522
1523    case Primitive::kPrimShort:
1524      switch (input_type) {
1525        case Primitive::kPrimByte:
1526        case Primitive::kPrimInt:
1527        case Primitive::kPrimChar:
1528          // Processing a Dex `int-to-short' instruction.
1529          __ sbfx(out.As<Register>(), in.As<Register>(), 0, 16);
1530          break;
1531
1532        default:
1533          LOG(FATAL) << "Unexpected type conversion from " << input_type
1534                     << " to " << result_type;
1535      }
1536      break;
1537
1538    case Primitive::kPrimInt:
1539      switch (input_type) {
1540        case Primitive::kPrimLong:
1541          // Processing a Dex `long-to-int' instruction.
1542          DCHECK(out.IsRegister());
1543          if (in.IsRegisterPair()) {
1544            __ Mov(out.As<Register>(), in.AsRegisterPairLow<Register>());
1545          } else if (in.IsDoubleStackSlot()) {
1546            __ LoadFromOffset(kLoadWord, out.As<Register>(), SP, in.GetStackIndex());
1547          } else {
1548            DCHECK(in.IsConstant());
1549            DCHECK(in.GetConstant()->IsLongConstant());
1550            int64_t value = in.GetConstant()->AsLongConstant()->GetValue();
1551            __ LoadImmediate(out.As<Register>(), static_cast<int32_t>(value));
1552          }
1553          break;
1554
1555        case Primitive::kPrimFloat:
1556        case Primitive::kPrimDouble:
1557          LOG(FATAL) << "Type conversion from " << input_type
1558                     << " to " << result_type << " not yet implemented";
1559          break;
1560
1561        default:
1562          LOG(FATAL) << "Unexpected type conversion from " << input_type
1563                     << " to " << result_type;
1564      }
1565      break;
1566
1567    case Primitive::kPrimLong:
1568      switch (input_type) {
1569        case Primitive::kPrimByte:
1570        case Primitive::kPrimShort:
1571        case Primitive::kPrimInt:
1572        case Primitive::kPrimChar:
1573          // Processing a Dex `int-to-long' instruction.
1574          DCHECK(out.IsRegisterPair());
1575          DCHECK(in.IsRegister());
1576          __ Mov(out.AsRegisterPairLow<Register>(), in.As<Register>());
1577          // Sign extension.
1578          __ Asr(out.AsRegisterPairHigh<Register>(),
1579                 out.AsRegisterPairLow<Register>(),
1580                 31);
1581          break;
1582
1583        case Primitive::kPrimFloat:
1584        case Primitive::kPrimDouble:
1585          LOG(FATAL) << "Type conversion from " << input_type << " to "
1586                     << result_type << " not yet implemented";
1587          break;
1588
1589        default:
1590          LOG(FATAL) << "Unexpected type conversion from " << input_type
1591                     << " to " << result_type;
1592      }
1593      break;
1594
1595    case Primitive::kPrimChar:
1596      switch (input_type) {
1597        case Primitive::kPrimByte:
1598        case Primitive::kPrimShort:
1599        case Primitive::kPrimInt:
1600        case Primitive::kPrimChar:
1601          // Processing a Dex `int-to-char' instruction.
1602          __ ubfx(out.As<Register>(), in.As<Register>(), 0, 16);
1603          break;
1604
1605        default:
1606          LOG(FATAL) << "Unexpected type conversion from " << input_type
1607                     << " to " << result_type;
1608      }
1609      break;
1610
1611    case Primitive::kPrimFloat:
1612      switch (input_type) {
1613        case Primitive::kPrimByte:
1614        case Primitive::kPrimShort:
1615        case Primitive::kPrimInt:
1616        case Primitive::kPrimChar: {
1617          // Processing a Dex `int-to-float' instruction.
1618          __ vmovsr(out.As<SRegister>(), in.As<Register>());
1619          __ vcvtsi(out.As<SRegister>(), out.As<SRegister>());
1620          break;
1621        }
1622
1623        case Primitive::kPrimLong:
1624        case Primitive::kPrimDouble:
1625          LOG(FATAL) << "Type conversion from " << input_type
1626                     << " to " << result_type << " not yet implemented";
1627          break;
1628
1629        default:
1630          LOG(FATAL) << "Unexpected type conversion from " << input_type
1631                     << " to " << result_type;
1632      };
1633      break;
1634
1635    case Primitive::kPrimDouble:
1636      switch (input_type) {
1637        case Primitive::kPrimByte:
1638        case Primitive::kPrimShort:
1639        case Primitive::kPrimInt:
1640        case Primitive::kPrimChar: {
1641          // Processing a Dex `int-to-double' instruction.
1642          __ vmovsr(out.AsFpuRegisterPairLow<SRegister>(), in.As<Register>());
1643          __ vcvtdi(FromLowSToD(out.AsFpuRegisterPairLow<SRegister>()),
1644                    out.AsFpuRegisterPairLow<SRegister>());
1645          break;
1646        }
1647
1648        case Primitive::kPrimLong:
1649        case Primitive::kPrimFloat:
1650          LOG(FATAL) << "Type conversion from " << input_type
1651                     << " to " << result_type << " not yet implemented";
1652          break;
1653
1654        default:
1655          LOG(FATAL) << "Unexpected type conversion from " << input_type
1656                     << " to " << result_type;
1657      };
1658      break;
1659
1660    default:
1661      LOG(FATAL) << "Unexpected type conversion from " << input_type
1662                 << " to " << result_type;
1663  }
1664}
1665
1666void LocationsBuilderARM::VisitAdd(HAdd* add) {
1667  LocationSummary* locations =
1668      new (GetGraph()->GetArena()) LocationSummary(add, LocationSummary::kNoCall);
1669  switch (add->GetResultType()) {
1670    case Primitive::kPrimInt:
1671    case Primitive::kPrimLong: {
1672      bool output_overlaps = (add->GetResultType() == Primitive::kPrimLong);
1673      locations->SetInAt(0, Location::RequiresRegister());
1674      locations->SetInAt(1, Location::RegisterOrConstant(add->InputAt(1)));
1675      locations->SetOut(Location::RequiresRegister(), output_overlaps);
1676      break;
1677    }
1678
1679    case Primitive::kPrimFloat:
1680    case Primitive::kPrimDouble: {
1681      locations->SetInAt(0, Location::RequiresFpuRegister());
1682      locations->SetInAt(1, Location::RequiresFpuRegister());
1683      locations->SetOut(Location::RequiresFpuRegister(), Location::kNoOutputOverlap);
1684      break;
1685    }
1686
1687    default:
1688      LOG(FATAL) << "Unexpected add type " << add->GetResultType();
1689  }
1690}
1691
1692void InstructionCodeGeneratorARM::VisitAdd(HAdd* add) {
1693  LocationSummary* locations = add->GetLocations();
1694  Location out = locations->Out();
1695  Location first = locations->InAt(0);
1696  Location second = locations->InAt(1);
1697  switch (add->GetResultType()) {
1698    case Primitive::kPrimInt:
1699      if (second.IsRegister()) {
1700        __ add(out.As<Register>(), first.As<Register>(), ShifterOperand(second.As<Register>()));
1701      } else {
1702        __ AddConstant(out.As<Register>(),
1703                       first.As<Register>(),
1704                       second.GetConstant()->AsIntConstant()->GetValue());
1705      }
1706      break;
1707
1708    case Primitive::kPrimLong:
1709      __ adds(out.AsRegisterPairLow<Register>(),
1710              first.AsRegisterPairLow<Register>(),
1711              ShifterOperand(second.AsRegisterPairLow<Register>()));
1712      __ adc(out.AsRegisterPairHigh<Register>(),
1713             first.AsRegisterPairHigh<Register>(),
1714             ShifterOperand(second.AsRegisterPairHigh<Register>()));
1715      break;
1716
1717    case Primitive::kPrimFloat:
1718      __ vadds(out.As<SRegister>(), first.As<SRegister>(), second.As<SRegister>());
1719      break;
1720
1721    case Primitive::kPrimDouble:
1722      __ vaddd(FromLowSToD(out.AsFpuRegisterPairLow<SRegister>()),
1723               FromLowSToD(first.AsFpuRegisterPairLow<SRegister>()),
1724               FromLowSToD(second.AsFpuRegisterPairLow<SRegister>()));
1725      break;
1726
1727    default:
1728      LOG(FATAL) << "Unexpected add type " << add->GetResultType();
1729  }
1730}
1731
1732void LocationsBuilderARM::VisitSub(HSub* sub) {
1733  LocationSummary* locations =
1734      new (GetGraph()->GetArena()) LocationSummary(sub, LocationSummary::kNoCall);
1735  switch (sub->GetResultType()) {
1736    case Primitive::kPrimInt:
1737    case Primitive::kPrimLong: {
1738      bool output_overlaps = (sub->GetResultType() == Primitive::kPrimLong);
1739      locations->SetInAt(0, Location::RequiresRegister());
1740      locations->SetInAt(1, Location::RegisterOrConstant(sub->InputAt(1)));
1741      locations->SetOut(Location::RequiresRegister(), output_overlaps);
1742      break;
1743    }
1744    case Primitive::kPrimFloat:
1745    case Primitive::kPrimDouble: {
1746      locations->SetInAt(0, Location::RequiresFpuRegister());
1747      locations->SetInAt(1, Location::RequiresFpuRegister());
1748      locations->SetOut(Location::RequiresFpuRegister(), Location::kNoOutputOverlap);
1749      break;
1750    }
1751    default:
1752      LOG(FATAL) << "Unexpected sub type " << sub->GetResultType();
1753  }
1754}
1755
1756void InstructionCodeGeneratorARM::VisitSub(HSub* sub) {
1757  LocationSummary* locations = sub->GetLocations();
1758  Location out = locations->Out();
1759  Location first = locations->InAt(0);
1760  Location second = locations->InAt(1);
1761  switch (sub->GetResultType()) {
1762    case Primitive::kPrimInt: {
1763      if (second.IsRegister()) {
1764        __ sub(out.As<Register>(), first.As<Register>(), ShifterOperand(second.As<Register>()));
1765      } else {
1766        __ AddConstant(out.As<Register>(),
1767                       first.As<Register>(),
1768                       -second.GetConstant()->AsIntConstant()->GetValue());
1769      }
1770      break;
1771    }
1772
1773    case Primitive::kPrimLong: {
1774      __ subs(out.AsRegisterPairLow<Register>(),
1775              first.AsRegisterPairLow<Register>(),
1776              ShifterOperand(second.AsRegisterPairLow<Register>()));
1777      __ sbc(out.AsRegisterPairHigh<Register>(),
1778             first.AsRegisterPairHigh<Register>(),
1779             ShifterOperand(second.AsRegisterPairHigh<Register>()));
1780      break;
1781    }
1782
1783    case Primitive::kPrimFloat: {
1784      __ vsubs(out.As<SRegister>(), first.As<SRegister>(), second.As<SRegister>());
1785      break;
1786    }
1787
1788    case Primitive::kPrimDouble: {
1789      __ vsubd(FromLowSToD(out.AsFpuRegisterPairLow<SRegister>()),
1790               FromLowSToD(first.AsFpuRegisterPairLow<SRegister>()),
1791               FromLowSToD(second.AsFpuRegisterPairLow<SRegister>()));
1792      break;
1793    }
1794
1795
1796    default:
1797      LOG(FATAL) << "Unexpected sub type " << sub->GetResultType();
1798  }
1799}
1800
1801void LocationsBuilderARM::VisitMul(HMul* mul) {
1802  LocationSummary* locations =
1803      new (GetGraph()->GetArena()) LocationSummary(mul, LocationSummary::kNoCall);
1804  switch (mul->GetResultType()) {
1805    case Primitive::kPrimInt:
1806    case Primitive::kPrimLong:  {
1807      locations->SetInAt(0, Location::RequiresRegister());
1808      locations->SetInAt(1, Location::RequiresRegister());
1809      locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1810      break;
1811    }
1812
1813    case Primitive::kPrimFloat:
1814    case Primitive::kPrimDouble: {
1815      locations->SetInAt(0, Location::RequiresFpuRegister());
1816      locations->SetInAt(1, Location::RequiresFpuRegister());
1817      locations->SetOut(Location::RequiresFpuRegister(), Location::kNoOutputOverlap);
1818      break;
1819    }
1820
1821    default:
1822      LOG(FATAL) << "Unexpected mul type " << mul->GetResultType();
1823  }
1824}
1825
1826void InstructionCodeGeneratorARM::VisitMul(HMul* mul) {
1827  LocationSummary* locations = mul->GetLocations();
1828  Location out = locations->Out();
1829  Location first = locations->InAt(0);
1830  Location second = locations->InAt(1);
1831  switch (mul->GetResultType()) {
1832    case Primitive::kPrimInt: {
1833      __ mul(out.As<Register>(), first.As<Register>(), second.As<Register>());
1834      break;
1835    }
1836    case Primitive::kPrimLong: {
1837      Register out_hi = out.AsRegisterPairHigh<Register>();
1838      Register out_lo = out.AsRegisterPairLow<Register>();
1839      Register in1_hi = first.AsRegisterPairHigh<Register>();
1840      Register in1_lo = first.AsRegisterPairLow<Register>();
1841      Register in2_hi = second.AsRegisterPairHigh<Register>();
1842      Register in2_lo = second.AsRegisterPairLow<Register>();
1843
1844      // Extra checks to protect caused by the existence of R1_R2.
1845      // The algorithm is wrong if out.hi is either in1.lo or in2.lo:
1846      // (e.g. in1=r0_r1, in2=r2_r3 and out=r1_r2);
1847      DCHECK_NE(out_hi, in1_lo);
1848      DCHECK_NE(out_hi, in2_lo);
1849
1850      // input: in1 - 64 bits, in2 - 64 bits
1851      // output: out
1852      // formula: out.hi : out.lo = (in1.lo * in2.hi + in1.hi * in2.lo)* 2^32 + in1.lo * in2.lo
1853      // parts: out.hi = in1.lo * in2.hi + in1.hi * in2.lo + (in1.lo * in2.lo)[63:32]
1854      // parts: out.lo = (in1.lo * in2.lo)[31:0]
1855
1856      // IP <- in1.lo * in2.hi
1857      __ mul(IP, in1_lo, in2_hi);
1858      // out.hi <- in1.lo * in2.hi + in1.hi * in2.lo
1859      __ mla(out_hi, in1_hi, in2_lo, IP);
1860      // out.lo <- (in1.lo * in2.lo)[31:0];
1861      __ umull(out_lo, IP, in1_lo, in2_lo);
1862      // out.hi <- in2.hi * in1.lo +  in2.lo * in1.hi + (in1.lo * in2.lo)[63:32]
1863      __ add(out_hi, out_hi, ShifterOperand(IP));
1864      break;
1865    }
1866
1867    case Primitive::kPrimFloat: {
1868      __ vmuls(out.As<SRegister>(), first.As<SRegister>(), second.As<SRegister>());
1869      break;
1870    }
1871
1872    case Primitive::kPrimDouble: {
1873      __ vmuld(FromLowSToD(out.AsFpuRegisterPairLow<SRegister>()),
1874               FromLowSToD(first.AsFpuRegisterPairLow<SRegister>()),
1875               FromLowSToD(second.AsFpuRegisterPairLow<SRegister>()));
1876      break;
1877    }
1878
1879    default:
1880      LOG(FATAL) << "Unexpected mul type " << mul->GetResultType();
1881  }
1882}
1883
1884void LocationsBuilderARM::VisitDiv(HDiv* div) {
1885  LocationSummary::CallKind call_kind = div->GetResultType() == Primitive::kPrimLong
1886      ? LocationSummary::kCall
1887      : LocationSummary::kNoCall;
1888  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(div, call_kind);
1889
1890  switch (div->GetResultType()) {
1891    case Primitive::kPrimInt: {
1892      locations->SetInAt(0, Location::RequiresRegister());
1893      locations->SetInAt(1, Location::RequiresRegister());
1894      locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1895      break;
1896    }
1897    case Primitive::kPrimLong: {
1898      InvokeRuntimeCallingConvention calling_convention;
1899      locations->SetInAt(0, Location::RegisterPairLocation(
1900          calling_convention.GetRegisterAt(0), calling_convention.GetRegisterAt(1)));
1901      locations->SetInAt(1, Location::RegisterPairLocation(
1902          calling_convention.GetRegisterAt(2), calling_convention.GetRegisterAt(3)));
1903      // The runtime helper puts the output in R0,R2.
1904      locations->SetOut(Location::RegisterPairLocation(R0, R2));
1905      break;
1906    }
1907    case Primitive::kPrimFloat:
1908    case Primitive::kPrimDouble: {
1909      locations->SetInAt(0, Location::RequiresFpuRegister());
1910      locations->SetInAt(1, Location::RequiresFpuRegister());
1911      locations->SetOut(Location::RequiresFpuRegister(), Location::kNoOutputOverlap);
1912      break;
1913    }
1914
1915    default:
1916      LOG(FATAL) << "Unexpected div type " << div->GetResultType();
1917  }
1918}
1919
1920void InstructionCodeGeneratorARM::VisitDiv(HDiv* div) {
1921  LocationSummary* locations = div->GetLocations();
1922  Location out = locations->Out();
1923  Location first = locations->InAt(0);
1924  Location second = locations->InAt(1);
1925
1926  switch (div->GetResultType()) {
1927    case Primitive::kPrimInt: {
1928      __ sdiv(out.As<Register>(), first.As<Register>(), second.As<Register>());
1929      break;
1930    }
1931
1932    case Primitive::kPrimLong: {
1933      InvokeRuntimeCallingConvention calling_convention;
1934      DCHECK_EQ(calling_convention.GetRegisterAt(0), first.AsRegisterPairLow<Register>());
1935      DCHECK_EQ(calling_convention.GetRegisterAt(1), first.AsRegisterPairHigh<Register>());
1936      DCHECK_EQ(calling_convention.GetRegisterAt(2), second.AsRegisterPairLow<Register>());
1937      DCHECK_EQ(calling_convention.GetRegisterAt(3), second.AsRegisterPairHigh<Register>());
1938      DCHECK_EQ(R0, out.AsRegisterPairLow<Register>());
1939      DCHECK_EQ(R2, out.AsRegisterPairHigh<Register>());
1940
1941      codegen_->InvokeRuntime(QUICK_ENTRY_POINT(pLdiv), div, div->GetDexPc());
1942      break;
1943    }
1944
1945    case Primitive::kPrimFloat: {
1946      __ vdivs(out.As<SRegister>(), first.As<SRegister>(), second.As<SRegister>());
1947      break;
1948    }
1949
1950    case Primitive::kPrimDouble: {
1951      __ vdivd(FromLowSToD(out.AsFpuRegisterPairLow<SRegister>()),
1952               FromLowSToD(first.AsFpuRegisterPairLow<SRegister>()),
1953               FromLowSToD(second.AsFpuRegisterPairLow<SRegister>()));
1954      break;
1955    }
1956
1957    default:
1958      LOG(FATAL) << "Unexpected div type " << div->GetResultType();
1959  }
1960}
1961
1962void LocationsBuilderARM::VisitRem(HRem* rem) {
1963  LocationSummary::CallKind call_kind = rem->GetResultType() == Primitive::kPrimLong
1964      ? LocationSummary::kCall
1965      : LocationSummary::kNoCall;
1966  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(rem, call_kind);
1967
1968  switch (rem->GetResultType()) {
1969    case Primitive::kPrimInt: {
1970      locations->SetInAt(0, Location::RequiresRegister());
1971      locations->SetInAt(1, Location::RequiresRegister());
1972      locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1973      locations->AddTemp(Location::RequiresRegister());
1974      break;
1975    }
1976    case Primitive::kPrimLong: {
1977      InvokeRuntimeCallingConvention calling_convention;
1978      locations->SetInAt(0, Location::RegisterPairLocation(
1979          calling_convention.GetRegisterAt(0), calling_convention.GetRegisterAt(1)));
1980      locations->SetInAt(1, Location::RegisterPairLocation(
1981          calling_convention.GetRegisterAt(2), calling_convention.GetRegisterAt(3)));
1982      // The runtime helper puts the output in R2,R3.
1983      locations->SetOut(Location::RegisterPairLocation(R2, R3));
1984      break;
1985    }
1986    case Primitive::kPrimFloat:
1987    case Primitive::kPrimDouble: {
1988      LOG(FATAL) << "Unimplemented rem type " << rem->GetResultType();
1989      break;
1990    }
1991
1992    default:
1993      LOG(FATAL) << "Unexpected rem type " << rem->GetResultType();
1994  }
1995}
1996
1997void InstructionCodeGeneratorARM::VisitRem(HRem* rem) {
1998  LocationSummary* locations = rem->GetLocations();
1999  Location out = locations->Out();
2000  Location first = locations->InAt(0);
2001  Location second = locations->InAt(1);
2002
2003  switch (rem->GetResultType()) {
2004    case Primitive::kPrimInt: {
2005      Register reg1 = first.As<Register>();
2006      Register reg2 = second.As<Register>();
2007      Register temp = locations->GetTemp(0).As<Register>();
2008
2009      // temp = reg1 / reg2  (integer division)
2010      // temp = temp * reg2
2011      // dest = reg1 - temp
2012      __ sdiv(temp, reg1, reg2);
2013      __ mul(temp, temp, reg2);
2014      __ sub(out.As<Register>(), reg1, ShifterOperand(temp));
2015      break;
2016    }
2017
2018    case Primitive::kPrimLong: {
2019      InvokeRuntimeCallingConvention calling_convention;
2020      DCHECK_EQ(calling_convention.GetRegisterAt(0), first.AsRegisterPairLow<Register>());
2021      DCHECK_EQ(calling_convention.GetRegisterAt(1), first.AsRegisterPairHigh<Register>());
2022      DCHECK_EQ(calling_convention.GetRegisterAt(2), second.AsRegisterPairLow<Register>());
2023      DCHECK_EQ(calling_convention.GetRegisterAt(3), second.AsRegisterPairHigh<Register>());
2024      DCHECK_EQ(R2, out.AsRegisterPairLow<Register>());
2025      DCHECK_EQ(R3, out.AsRegisterPairHigh<Register>());
2026
2027      codegen_->InvokeRuntime(QUICK_ENTRY_POINT(pLmod), rem, rem->GetDexPc());
2028      break;
2029    }
2030
2031    case Primitive::kPrimFloat:
2032    case Primitive::kPrimDouble: {
2033      LOG(FATAL) << "Unimplemented rem type " << rem->GetResultType();
2034      break;
2035    }
2036
2037    default:
2038      LOG(FATAL) << "Unexpected rem type " << rem->GetResultType();
2039  }
2040}
2041
2042void LocationsBuilderARM::VisitDivZeroCheck(HDivZeroCheck* instruction) {
2043  LocationSummary* locations =
2044      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2045  locations->SetInAt(0, Location::RegisterOrConstant(instruction->InputAt(0)));
2046  if (instruction->HasUses()) {
2047    locations->SetOut(Location::SameAsFirstInput());
2048  }
2049}
2050
2051void InstructionCodeGeneratorARM::VisitDivZeroCheck(HDivZeroCheck* instruction) {
2052  SlowPathCodeARM* slow_path = new (GetGraph()->GetArena()) DivZeroCheckSlowPathARM(instruction);
2053  codegen_->AddSlowPath(slow_path);
2054
2055  LocationSummary* locations = instruction->GetLocations();
2056  Location value = locations->InAt(0);
2057
2058  switch (instruction->GetType()) {
2059    case Primitive::kPrimInt: {
2060      if (value.IsRegister()) {
2061        __ cmp(value.As<Register>(), ShifterOperand(0));
2062        __ b(slow_path->GetEntryLabel(), EQ);
2063      } else {
2064        DCHECK(value.IsConstant()) << value;
2065        if (value.GetConstant()->AsIntConstant()->GetValue() == 0) {
2066          __ b(slow_path->GetEntryLabel());
2067        }
2068      }
2069      break;
2070    }
2071    case Primitive::kPrimLong: {
2072      if (value.IsRegisterPair()) {
2073        __ orrs(IP,
2074                value.AsRegisterPairLow<Register>(),
2075                ShifterOperand(value.AsRegisterPairHigh<Register>()));
2076        __ b(slow_path->GetEntryLabel(), EQ);
2077      } else {
2078        DCHECK(value.IsConstant()) << value;
2079        if (value.GetConstant()->AsLongConstant()->GetValue() == 0) {
2080          __ b(slow_path->GetEntryLabel());
2081        }
2082      }
2083      break;
2084    default:
2085      LOG(FATAL) << "Unexpected type for HDivZeroCheck " << instruction->GetType();
2086    }
2087  }
2088}
2089
2090void LocationsBuilderARM::VisitNewInstance(HNewInstance* instruction) {
2091  LocationSummary* locations =
2092      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kCall);
2093  InvokeRuntimeCallingConvention calling_convention;
2094  locations->AddTemp(Location::RegisterLocation(calling_convention.GetRegisterAt(0)));
2095  locations->AddTemp(Location::RegisterLocation(calling_convention.GetRegisterAt(1)));
2096  locations->SetOut(Location::RegisterLocation(R0));
2097}
2098
2099void InstructionCodeGeneratorARM::VisitNewInstance(HNewInstance* instruction) {
2100  InvokeRuntimeCallingConvention calling_convention;
2101  codegen_->LoadCurrentMethod(calling_convention.GetRegisterAt(1));
2102  __ LoadImmediate(calling_convention.GetRegisterAt(0), instruction->GetTypeIndex());
2103  codegen_->InvokeRuntime(
2104      QUICK_ENTRY_POINT(pAllocObjectWithAccessCheck), instruction, instruction->GetDexPc());
2105}
2106
2107void LocationsBuilderARM::VisitNewArray(HNewArray* instruction) {
2108  LocationSummary* locations =
2109      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kCall);
2110  InvokeRuntimeCallingConvention calling_convention;
2111  locations->AddTemp(Location::RegisterLocation(calling_convention.GetRegisterAt(0)));
2112  locations->AddTemp(Location::RegisterLocation(calling_convention.GetRegisterAt(1)));
2113  locations->SetOut(Location::RegisterLocation(R0));
2114  locations->SetInAt(0, Location::RegisterLocation(calling_convention.GetRegisterAt(2)));
2115}
2116
2117void InstructionCodeGeneratorARM::VisitNewArray(HNewArray* instruction) {
2118  InvokeRuntimeCallingConvention calling_convention;
2119  codegen_->LoadCurrentMethod(calling_convention.GetRegisterAt(1));
2120  __ LoadImmediate(calling_convention.GetRegisterAt(0), instruction->GetTypeIndex());
2121  codegen_->InvokeRuntime(
2122      QUICK_ENTRY_POINT(pAllocArrayWithAccessCheck), instruction, instruction->GetDexPc());
2123}
2124
2125void LocationsBuilderARM::VisitParameterValue(HParameterValue* instruction) {
2126  LocationSummary* locations =
2127      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2128  Location location = parameter_visitor_.GetNextLocation(instruction->GetType());
2129  if (location.IsStackSlot()) {
2130    location = Location::StackSlot(location.GetStackIndex() + codegen_->GetFrameSize());
2131  } else if (location.IsDoubleStackSlot()) {
2132    location = Location::DoubleStackSlot(location.GetStackIndex() + codegen_->GetFrameSize());
2133  }
2134  locations->SetOut(location);
2135}
2136
2137void InstructionCodeGeneratorARM::VisitParameterValue(HParameterValue* instruction) {
2138  // Nothing to do, the parameter is already at its location.
2139  UNUSED(instruction);
2140}
2141
2142void LocationsBuilderARM::VisitNot(HNot* not_) {
2143  LocationSummary* locations =
2144      new (GetGraph()->GetArena()) LocationSummary(not_, LocationSummary::kNoCall);
2145  locations->SetInAt(0, Location::RequiresRegister());
2146  locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
2147}
2148
2149void InstructionCodeGeneratorARM::VisitNot(HNot* not_) {
2150  LocationSummary* locations = not_->GetLocations();
2151  Location out = locations->Out();
2152  Location in = locations->InAt(0);
2153  switch (not_->InputAt(0)->GetType()) {
2154    case Primitive::kPrimBoolean:
2155      __ eor(out.As<Register>(), in.As<Register>(), ShifterOperand(1));
2156      break;
2157
2158    case Primitive::kPrimInt:
2159      __ mvn(out.As<Register>(), ShifterOperand(in.As<Register>()));
2160      break;
2161
2162    case Primitive::kPrimLong:
2163      __ mvn(out.AsRegisterPairLow<Register>(),
2164             ShifterOperand(in.AsRegisterPairLow<Register>()));
2165      __ mvn(out.AsRegisterPairHigh<Register>(),
2166             ShifterOperand(in.AsRegisterPairHigh<Register>()));
2167      break;
2168
2169    default:
2170      LOG(FATAL) << "Unimplemented type for not operation " << not_->GetResultType();
2171  }
2172}
2173
2174void LocationsBuilderARM::VisitCompare(HCompare* compare) {
2175  LocationSummary* locations =
2176      new (GetGraph()->GetArena()) LocationSummary(compare, LocationSummary::kNoCall);
2177  locations->SetInAt(0, Location::RequiresRegister());
2178  locations->SetInAt(1, Location::RequiresRegister());
2179  locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
2180}
2181
2182void InstructionCodeGeneratorARM::VisitCompare(HCompare* compare) {
2183  LocationSummary* locations = compare->GetLocations();
2184  switch (compare->InputAt(0)->GetType()) {
2185    case Primitive::kPrimLong: {
2186      Register output = locations->Out().As<Register>();
2187      Location left = locations->InAt(0);
2188      Location right = locations->InAt(1);
2189      Label less, greater, done;
2190      __ cmp(left.AsRegisterPairHigh<Register>(),
2191             ShifterOperand(right.AsRegisterPairHigh<Register>()));  // Signed compare.
2192      __ b(&less, LT);
2193      __ b(&greater, GT);
2194      // Do LoadImmediate before any `cmp`, as LoadImmediate might affect
2195      // the status flags.
2196      __ LoadImmediate(output, 0);
2197      __ cmp(left.AsRegisterPairLow<Register>(),
2198             ShifterOperand(right.AsRegisterPairLow<Register>()));  // Unsigned compare.
2199      __ b(&done, EQ);
2200      __ b(&less, CC);
2201
2202      __ Bind(&greater);
2203      __ LoadImmediate(output, 1);
2204      __ b(&done);
2205
2206      __ Bind(&less);
2207      __ LoadImmediate(output, -1);
2208
2209      __ Bind(&done);
2210      break;
2211    }
2212    default:
2213      LOG(FATAL) << "Unimplemented compare type " << compare->InputAt(0)->GetType();
2214  }
2215}
2216
2217void LocationsBuilderARM::VisitPhi(HPhi* instruction) {
2218  LocationSummary* locations =
2219      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2220  for (size_t i = 0, e = instruction->InputCount(); i < e; ++i) {
2221    locations->SetInAt(i, Location::Any());
2222  }
2223  locations->SetOut(Location::Any());
2224}
2225
2226void InstructionCodeGeneratorARM::VisitPhi(HPhi* instruction) {
2227  UNUSED(instruction);
2228  LOG(FATAL) << "Unreachable";
2229}
2230
2231void LocationsBuilderARM::VisitInstanceFieldSet(HInstanceFieldSet* instruction) {
2232  LocationSummary* locations =
2233      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2234  bool needs_write_barrier =
2235      CodeGenerator::StoreNeedsWriteBarrier(instruction->GetFieldType(), instruction->GetValue());
2236  locations->SetInAt(0, Location::RequiresRegister());
2237  locations->SetInAt(1, Location::RequiresRegister());
2238  // Temporary registers for the write barrier.
2239  if (needs_write_barrier) {
2240    locations->AddTemp(Location::RequiresRegister());
2241    locations->AddTemp(Location::RequiresRegister());
2242  }
2243}
2244
2245void InstructionCodeGeneratorARM::VisitInstanceFieldSet(HInstanceFieldSet* instruction) {
2246  LocationSummary* locations = instruction->GetLocations();
2247  Register obj = locations->InAt(0).As<Register>();
2248  uint32_t offset = instruction->GetFieldOffset().Uint32Value();
2249  Primitive::Type field_type = instruction->GetFieldType();
2250
2251  switch (field_type) {
2252    case Primitive::kPrimBoolean:
2253    case Primitive::kPrimByte: {
2254      Register value = locations->InAt(1).As<Register>();
2255      __ StoreToOffset(kStoreByte, value, obj, offset);
2256      break;
2257    }
2258
2259    case Primitive::kPrimShort:
2260    case Primitive::kPrimChar: {
2261      Register value = locations->InAt(1).As<Register>();
2262      __ StoreToOffset(kStoreHalfword, value, obj, offset);
2263      break;
2264    }
2265
2266    case Primitive::kPrimInt:
2267    case Primitive::kPrimNot: {
2268      Register value = locations->InAt(1).As<Register>();
2269      __ StoreToOffset(kStoreWord, value, obj, offset);
2270      if (CodeGenerator::StoreNeedsWriteBarrier(field_type, instruction->GetValue())) {
2271        Register temp = locations->GetTemp(0).As<Register>();
2272        Register card = locations->GetTemp(1).As<Register>();
2273        codegen_->MarkGCCard(temp, card, obj, value);
2274      }
2275      break;
2276    }
2277
2278    case Primitive::kPrimLong: {
2279      Location value = locations->InAt(1);
2280      __ StoreToOffset(kStoreWordPair, value.AsRegisterPairLow<Register>(), obj, offset);
2281      break;
2282    }
2283
2284    case Primitive::kPrimFloat: {
2285      SRegister value = locations->InAt(1).As<SRegister>();
2286      __ StoreSToOffset(value, obj, offset);
2287      break;
2288    }
2289
2290    case Primitive::kPrimDouble: {
2291      DRegister value = FromLowSToD(locations->InAt(1).AsFpuRegisterPairLow<SRegister>());
2292      __ StoreDToOffset(value, obj, offset);
2293      break;
2294    }
2295
2296    case Primitive::kPrimVoid:
2297      LOG(FATAL) << "Unreachable type " << field_type;
2298      UNREACHABLE();
2299  }
2300}
2301
2302void LocationsBuilderARM::VisitInstanceFieldGet(HInstanceFieldGet* instruction) {
2303  LocationSummary* locations =
2304      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2305  locations->SetInAt(0, Location::RequiresRegister());
2306  locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
2307}
2308
2309void InstructionCodeGeneratorARM::VisitInstanceFieldGet(HInstanceFieldGet* instruction) {
2310  LocationSummary* locations = instruction->GetLocations();
2311  Register obj = locations->InAt(0).As<Register>();
2312  uint32_t offset = instruction->GetFieldOffset().Uint32Value();
2313
2314  switch (instruction->GetType()) {
2315    case Primitive::kPrimBoolean: {
2316      Register out = locations->Out().As<Register>();
2317      __ LoadFromOffset(kLoadUnsignedByte, out, obj, offset);
2318      break;
2319    }
2320
2321    case Primitive::kPrimByte: {
2322      Register out = locations->Out().As<Register>();
2323      __ LoadFromOffset(kLoadSignedByte, out, obj, offset);
2324      break;
2325    }
2326
2327    case Primitive::kPrimShort: {
2328      Register out = locations->Out().As<Register>();
2329      __ LoadFromOffset(kLoadSignedHalfword, out, obj, offset);
2330      break;
2331    }
2332
2333    case Primitive::kPrimChar: {
2334      Register out = locations->Out().As<Register>();
2335      __ LoadFromOffset(kLoadUnsignedHalfword, out, obj, offset);
2336      break;
2337    }
2338
2339    case Primitive::kPrimInt:
2340    case Primitive::kPrimNot: {
2341      Register out = locations->Out().As<Register>();
2342      __ LoadFromOffset(kLoadWord, out, obj, offset);
2343      break;
2344    }
2345
2346    case Primitive::kPrimLong: {
2347      // TODO: support volatile.
2348      Location out = locations->Out();
2349      __ LoadFromOffset(kLoadWordPair, out.AsRegisterPairLow<Register>(), obj, offset);
2350      break;
2351    }
2352
2353    case Primitive::kPrimFloat: {
2354      SRegister out = locations->Out().As<SRegister>();
2355      __ LoadSFromOffset(out, obj, offset);
2356      break;
2357    }
2358
2359    case Primitive::kPrimDouble: {
2360      DRegister out = FromLowSToD(locations->Out().AsFpuRegisterPairLow<SRegister>());
2361      __ LoadDFromOffset(out, obj, offset);
2362      break;
2363    }
2364
2365    case Primitive::kPrimVoid:
2366      LOG(FATAL) << "Unreachable type " << instruction->GetType();
2367      UNREACHABLE();
2368  }
2369}
2370
2371void LocationsBuilderARM::VisitNullCheck(HNullCheck* instruction) {
2372  LocationSummary* locations =
2373      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2374  locations->SetInAt(0, Location::RequiresRegister());
2375  if (instruction->HasUses()) {
2376    locations->SetOut(Location::SameAsFirstInput());
2377  }
2378}
2379
2380void InstructionCodeGeneratorARM::VisitNullCheck(HNullCheck* instruction) {
2381  SlowPathCodeARM* slow_path = new (GetGraph()->GetArena()) NullCheckSlowPathARM(instruction);
2382  codegen_->AddSlowPath(slow_path);
2383
2384  LocationSummary* locations = instruction->GetLocations();
2385  Location obj = locations->InAt(0);
2386
2387  if (obj.IsRegister()) {
2388    __ cmp(obj.As<Register>(), ShifterOperand(0));
2389    __ b(slow_path->GetEntryLabel(), EQ);
2390  } else {
2391    DCHECK(obj.IsConstant()) << obj;
2392    DCHECK_EQ(obj.GetConstant()->AsIntConstant()->GetValue(), 0);
2393    __ b(slow_path->GetEntryLabel());
2394  }
2395}
2396
2397void LocationsBuilderARM::VisitArrayGet(HArrayGet* instruction) {
2398  LocationSummary* locations =
2399      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2400  locations->SetInAt(0, Location::RequiresRegister());
2401  locations->SetInAt(1, Location::RegisterOrConstant(instruction->InputAt(1)));
2402  locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
2403}
2404
2405void InstructionCodeGeneratorARM::VisitArrayGet(HArrayGet* instruction) {
2406  LocationSummary* locations = instruction->GetLocations();
2407  Register obj = locations->InAt(0).As<Register>();
2408  Location index = locations->InAt(1);
2409
2410  switch (instruction->GetType()) {
2411    case Primitive::kPrimBoolean: {
2412      uint32_t data_offset = mirror::Array::DataOffset(sizeof(uint8_t)).Uint32Value();
2413      Register out = locations->Out().As<Register>();
2414      if (index.IsConstant()) {
2415        size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_1) + data_offset;
2416        __ LoadFromOffset(kLoadUnsignedByte, out, obj, offset);
2417      } else {
2418        __ add(IP, obj, ShifterOperand(index.As<Register>()));
2419        __ LoadFromOffset(kLoadUnsignedByte, out, IP, data_offset);
2420      }
2421      break;
2422    }
2423
2424    case Primitive::kPrimByte: {
2425      uint32_t data_offset = mirror::Array::DataOffset(sizeof(int8_t)).Uint32Value();
2426      Register out = locations->Out().As<Register>();
2427      if (index.IsConstant()) {
2428        size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_1) + data_offset;
2429        __ LoadFromOffset(kLoadSignedByte, out, obj, offset);
2430      } else {
2431        __ add(IP, obj, ShifterOperand(index.As<Register>()));
2432        __ LoadFromOffset(kLoadSignedByte, out, IP, data_offset);
2433      }
2434      break;
2435    }
2436
2437    case Primitive::kPrimShort: {
2438      uint32_t data_offset = mirror::Array::DataOffset(sizeof(int16_t)).Uint32Value();
2439      Register out = locations->Out().As<Register>();
2440      if (index.IsConstant()) {
2441        size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_2) + data_offset;
2442        __ LoadFromOffset(kLoadSignedHalfword, out, obj, offset);
2443      } else {
2444        __ add(IP, obj, ShifterOperand(index.As<Register>(), LSL, TIMES_2));
2445        __ LoadFromOffset(kLoadSignedHalfword, out, IP, data_offset);
2446      }
2447      break;
2448    }
2449
2450    case Primitive::kPrimChar: {
2451      uint32_t data_offset = mirror::Array::DataOffset(sizeof(uint16_t)).Uint32Value();
2452      Register out = locations->Out().As<Register>();
2453      if (index.IsConstant()) {
2454        size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_2) + data_offset;
2455        __ LoadFromOffset(kLoadUnsignedHalfword, out, obj, offset);
2456      } else {
2457        __ add(IP, obj, ShifterOperand(index.As<Register>(), LSL, TIMES_2));
2458        __ LoadFromOffset(kLoadUnsignedHalfword, out, IP, data_offset);
2459      }
2460      break;
2461    }
2462
2463    case Primitive::kPrimInt:
2464    case Primitive::kPrimNot: {
2465      DCHECK_EQ(sizeof(mirror::HeapReference<mirror::Object>), sizeof(int32_t));
2466      uint32_t data_offset = mirror::Array::DataOffset(sizeof(int32_t)).Uint32Value();
2467      Register out = locations->Out().As<Register>();
2468      if (index.IsConstant()) {
2469        size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_4) + data_offset;
2470        __ LoadFromOffset(kLoadWord, out, obj, offset);
2471      } else {
2472        __ add(IP, obj, ShifterOperand(index.As<Register>(), LSL, TIMES_4));
2473        __ LoadFromOffset(kLoadWord, out, IP, data_offset);
2474      }
2475      break;
2476    }
2477
2478    case Primitive::kPrimLong: {
2479      uint32_t data_offset = mirror::Array::DataOffset(sizeof(int64_t)).Uint32Value();
2480      Location out = locations->Out();
2481      if (index.IsConstant()) {
2482        size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_8) + data_offset;
2483        __ LoadFromOffset(kLoadWordPair, out.AsRegisterPairLow<Register>(), obj, offset);
2484      } else {
2485        __ add(IP, obj, ShifterOperand(index.As<Register>(), LSL, TIMES_8));
2486        __ LoadFromOffset(kLoadWordPair, out.AsRegisterPairLow<Register>(), IP, data_offset);
2487      }
2488      break;
2489    }
2490
2491    case Primitive::kPrimFloat:
2492    case Primitive::kPrimDouble:
2493      LOG(FATAL) << "Unimplemented register type " << instruction->GetType();
2494      UNREACHABLE();
2495    case Primitive::kPrimVoid:
2496      LOG(FATAL) << "Unreachable type " << instruction->GetType();
2497      UNREACHABLE();
2498  }
2499}
2500
2501void LocationsBuilderARM::VisitArraySet(HArraySet* instruction) {
2502  Primitive::Type value_type = instruction->GetComponentType();
2503
2504  bool needs_write_barrier =
2505      CodeGenerator::StoreNeedsWriteBarrier(value_type, instruction->GetValue());
2506  bool needs_runtime_call = instruction->NeedsTypeCheck();
2507
2508  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(
2509      instruction, needs_runtime_call ? LocationSummary::kCall : LocationSummary::kNoCall);
2510  if (needs_runtime_call) {
2511    InvokeRuntimeCallingConvention calling_convention;
2512    locations->SetInAt(0, Location::RegisterLocation(calling_convention.GetRegisterAt(0)));
2513    locations->SetInAt(1, Location::RegisterLocation(calling_convention.GetRegisterAt(1)));
2514    locations->SetInAt(2, Location::RegisterLocation(calling_convention.GetRegisterAt(2)));
2515  } else {
2516    locations->SetInAt(0, Location::RequiresRegister());
2517    locations->SetInAt(1, Location::RegisterOrConstant(instruction->InputAt(1)));
2518    locations->SetInAt(2, Location::RequiresRegister());
2519
2520    if (needs_write_barrier) {
2521      // Temporary registers for the write barrier.
2522      locations->AddTemp(Location::RequiresRegister());
2523      locations->AddTemp(Location::RequiresRegister());
2524    }
2525  }
2526}
2527
2528void InstructionCodeGeneratorARM::VisitArraySet(HArraySet* instruction) {
2529  LocationSummary* locations = instruction->GetLocations();
2530  Register obj = locations->InAt(0).As<Register>();
2531  Location index = locations->InAt(1);
2532  Primitive::Type value_type = instruction->GetComponentType();
2533  bool needs_runtime_call = locations->WillCall();
2534  bool needs_write_barrier =
2535      CodeGenerator::StoreNeedsWriteBarrier(value_type, instruction->GetValue());
2536
2537  switch (value_type) {
2538    case Primitive::kPrimBoolean:
2539    case Primitive::kPrimByte: {
2540      uint32_t data_offset = mirror::Array::DataOffset(sizeof(uint8_t)).Uint32Value();
2541      Register value = locations->InAt(2).As<Register>();
2542      if (index.IsConstant()) {
2543        size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_1) + data_offset;
2544        __ StoreToOffset(kStoreByte, value, obj, offset);
2545      } else {
2546        __ add(IP, obj, ShifterOperand(index.As<Register>()));
2547        __ StoreToOffset(kStoreByte, value, IP, data_offset);
2548      }
2549      break;
2550    }
2551
2552    case Primitive::kPrimShort:
2553    case Primitive::kPrimChar: {
2554      uint32_t data_offset = mirror::Array::DataOffset(sizeof(uint16_t)).Uint32Value();
2555      Register value = locations->InAt(2).As<Register>();
2556      if (index.IsConstant()) {
2557        size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_2) + data_offset;
2558        __ StoreToOffset(kStoreHalfword, value, obj, offset);
2559      } else {
2560        __ add(IP, obj, ShifterOperand(index.As<Register>(), LSL, TIMES_2));
2561        __ StoreToOffset(kStoreHalfword, value, IP, data_offset);
2562      }
2563      break;
2564    }
2565
2566    case Primitive::kPrimInt:
2567    case Primitive::kPrimNot: {
2568      if (!needs_runtime_call) {
2569        uint32_t data_offset = mirror::Array::DataOffset(sizeof(int32_t)).Uint32Value();
2570        Register value = locations->InAt(2).As<Register>();
2571        if (index.IsConstant()) {
2572          size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_4) + data_offset;
2573          __ StoreToOffset(kStoreWord, value, obj, offset);
2574        } else {
2575          DCHECK(index.IsRegister()) << index;
2576          __ add(IP, obj, ShifterOperand(index.As<Register>(), LSL, TIMES_4));
2577          __ StoreToOffset(kStoreWord, value, IP, data_offset);
2578        }
2579        if (needs_write_barrier) {
2580          DCHECK_EQ(value_type, Primitive::kPrimNot);
2581          Register temp = locations->GetTemp(0).As<Register>();
2582          Register card = locations->GetTemp(1).As<Register>();
2583          codegen_->MarkGCCard(temp, card, obj, value);
2584        }
2585      } else {
2586        DCHECK_EQ(value_type, Primitive::kPrimNot);
2587        codegen_->InvokeRuntime(QUICK_ENTRY_POINT(pAputObject), instruction, instruction->GetDexPc());
2588      }
2589      break;
2590    }
2591
2592    case Primitive::kPrimLong: {
2593      uint32_t data_offset = mirror::Array::DataOffset(sizeof(int64_t)).Uint32Value();
2594      Location value = locations->InAt(2);
2595      if (index.IsConstant()) {
2596        size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_8) + data_offset;
2597        __ StoreToOffset(kStoreWordPair, value.AsRegisterPairLow<Register>(), obj, offset);
2598      } else {
2599        __ add(IP, obj, ShifterOperand(index.As<Register>(), LSL, TIMES_8));
2600        __ StoreToOffset(kStoreWordPair, value.AsRegisterPairLow<Register>(), IP, data_offset);
2601      }
2602      break;
2603    }
2604
2605    case Primitive::kPrimFloat:
2606    case Primitive::kPrimDouble:
2607      LOG(FATAL) << "Unimplemented register type " << instruction->GetType();
2608      UNREACHABLE();
2609    case Primitive::kPrimVoid:
2610      LOG(FATAL) << "Unreachable type " << instruction->GetType();
2611      UNREACHABLE();
2612  }
2613}
2614
2615void LocationsBuilderARM::VisitArrayLength(HArrayLength* instruction) {
2616  LocationSummary* locations =
2617      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2618  locations->SetInAt(0, Location::RequiresRegister());
2619  locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
2620}
2621
2622void InstructionCodeGeneratorARM::VisitArrayLength(HArrayLength* instruction) {
2623  LocationSummary* locations = instruction->GetLocations();
2624  uint32_t offset = mirror::Array::LengthOffset().Uint32Value();
2625  Register obj = locations->InAt(0).As<Register>();
2626  Register out = locations->Out().As<Register>();
2627  __ LoadFromOffset(kLoadWord, out, obj, offset);
2628}
2629
2630void LocationsBuilderARM::VisitBoundsCheck(HBoundsCheck* instruction) {
2631  LocationSummary* locations =
2632      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2633  locations->SetInAt(0, Location::RequiresRegister());
2634  locations->SetInAt(1, Location::RequiresRegister());
2635  if (instruction->HasUses()) {
2636    locations->SetOut(Location::SameAsFirstInput());
2637  }
2638}
2639
2640void InstructionCodeGeneratorARM::VisitBoundsCheck(HBoundsCheck* instruction) {
2641  LocationSummary* locations = instruction->GetLocations();
2642  SlowPathCodeARM* slow_path = new (GetGraph()->GetArena()) BoundsCheckSlowPathARM(
2643      instruction, locations->InAt(0), locations->InAt(1));
2644  codegen_->AddSlowPath(slow_path);
2645
2646  Register index = locations->InAt(0).As<Register>();
2647  Register length = locations->InAt(1).As<Register>();
2648
2649  __ cmp(index, ShifterOperand(length));
2650  __ b(slow_path->GetEntryLabel(), CS);
2651}
2652
2653void CodeGeneratorARM::MarkGCCard(Register temp, Register card, Register object, Register value) {
2654  Label is_null;
2655  __ CompareAndBranchIfZero(value, &is_null);
2656  __ LoadFromOffset(kLoadWord, card, TR, Thread::CardTableOffset<kArmWordSize>().Int32Value());
2657  __ Lsr(temp, object, gc::accounting::CardTable::kCardShift);
2658  __ strb(card, Address(card, temp));
2659  __ Bind(&is_null);
2660}
2661
2662void LocationsBuilderARM::VisitTemporary(HTemporary* temp) {
2663  temp->SetLocations(nullptr);
2664}
2665
2666void InstructionCodeGeneratorARM::VisitTemporary(HTemporary* temp) {
2667  // Nothing to do, this is driven by the code generator.
2668  UNUSED(temp);
2669}
2670
2671void LocationsBuilderARM::VisitParallelMove(HParallelMove* instruction) {
2672  UNUSED(instruction);
2673  LOG(FATAL) << "Unreachable";
2674}
2675
2676void InstructionCodeGeneratorARM::VisitParallelMove(HParallelMove* instruction) {
2677  codegen_->GetMoveResolver()->EmitNativeCode(instruction);
2678}
2679
2680void LocationsBuilderARM::VisitSuspendCheck(HSuspendCheck* instruction) {
2681  new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kCallOnSlowPath);
2682}
2683
2684void InstructionCodeGeneratorARM::VisitSuspendCheck(HSuspendCheck* instruction) {
2685  HBasicBlock* block = instruction->GetBlock();
2686  if (block->GetLoopInformation() != nullptr) {
2687    DCHECK(block->GetLoopInformation()->GetSuspendCheck() == instruction);
2688    // The back edge will generate the suspend check.
2689    return;
2690  }
2691  if (block->IsEntryBlock() && instruction->GetNext()->IsGoto()) {
2692    // The goto will generate the suspend check.
2693    return;
2694  }
2695  GenerateSuspendCheck(instruction, nullptr);
2696}
2697
2698void InstructionCodeGeneratorARM::GenerateSuspendCheck(HSuspendCheck* instruction,
2699                                                       HBasicBlock* successor) {
2700  SuspendCheckSlowPathARM* slow_path =
2701      new (GetGraph()->GetArena()) SuspendCheckSlowPathARM(instruction, successor);
2702  codegen_->AddSlowPath(slow_path);
2703
2704  __ LoadFromOffset(
2705      kLoadUnsignedHalfword, IP, TR, Thread::ThreadFlagsOffset<kArmWordSize>().Int32Value());
2706  __ cmp(IP, ShifterOperand(0));
2707  // TODO: Figure out the branch offsets and use cbz/cbnz.
2708  if (successor == nullptr) {
2709    __ b(slow_path->GetEntryLabel(), NE);
2710    __ Bind(slow_path->GetReturnLabel());
2711  } else {
2712    __ b(codegen_->GetLabelOf(successor), EQ);
2713    __ b(slow_path->GetEntryLabel());
2714  }
2715}
2716
2717ArmAssembler* ParallelMoveResolverARM::GetAssembler() const {
2718  return codegen_->GetAssembler();
2719}
2720
2721void ParallelMoveResolverARM::EmitMove(size_t index) {
2722  MoveOperands* move = moves_.Get(index);
2723  Location source = move->GetSource();
2724  Location destination = move->GetDestination();
2725
2726  if (source.IsRegister()) {
2727    if (destination.IsRegister()) {
2728      __ Mov(destination.As<Register>(), source.As<Register>());
2729    } else {
2730      DCHECK(destination.IsStackSlot());
2731      __ StoreToOffset(kStoreWord, source.As<Register>(),
2732                       SP, destination.GetStackIndex());
2733    }
2734  } else if (source.IsStackSlot()) {
2735    if (destination.IsRegister()) {
2736      __ LoadFromOffset(kLoadWord, destination.As<Register>(),
2737                        SP, source.GetStackIndex());
2738    } else {
2739      DCHECK(destination.IsStackSlot());
2740      __ LoadFromOffset(kLoadWord, IP, SP, source.GetStackIndex());
2741      __ StoreToOffset(kStoreWord, IP, SP, destination.GetStackIndex());
2742    }
2743  } else {
2744    DCHECK(source.IsConstant());
2745    DCHECK(source.GetConstant()->IsIntConstant());
2746    int32_t value = source.GetConstant()->AsIntConstant()->GetValue();
2747    if (destination.IsRegister()) {
2748      __ LoadImmediate(destination.As<Register>(), value);
2749    } else {
2750      DCHECK(destination.IsStackSlot());
2751      __ LoadImmediate(IP, value);
2752      __ StoreToOffset(kStoreWord, IP, SP, destination.GetStackIndex());
2753    }
2754  }
2755}
2756
2757void ParallelMoveResolverARM::Exchange(Register reg, int mem) {
2758  __ Mov(IP, reg);
2759  __ LoadFromOffset(kLoadWord, reg, SP, mem);
2760  __ StoreToOffset(kStoreWord, IP, SP, mem);
2761}
2762
2763void ParallelMoveResolverARM::Exchange(int mem1, int mem2) {
2764  ScratchRegisterScope ensure_scratch(this, IP, R0, codegen_->GetNumberOfCoreRegisters());
2765  int stack_offset = ensure_scratch.IsSpilled() ? kArmWordSize : 0;
2766  __ LoadFromOffset(kLoadWord, static_cast<Register>(ensure_scratch.GetRegister()),
2767                    SP, mem1 + stack_offset);
2768  __ LoadFromOffset(kLoadWord, IP, SP, mem2 + stack_offset);
2769  __ StoreToOffset(kStoreWord, static_cast<Register>(ensure_scratch.GetRegister()),
2770                   SP, mem2 + stack_offset);
2771  __ StoreToOffset(kStoreWord, IP, SP, mem1 + stack_offset);
2772}
2773
2774void ParallelMoveResolverARM::EmitSwap(size_t index) {
2775  MoveOperands* move = moves_.Get(index);
2776  Location source = move->GetSource();
2777  Location destination = move->GetDestination();
2778
2779  if (source.IsRegister() && destination.IsRegister()) {
2780    DCHECK_NE(source.As<Register>(), IP);
2781    DCHECK_NE(destination.As<Register>(), IP);
2782    __ Mov(IP, source.As<Register>());
2783    __ Mov(source.As<Register>(), destination.As<Register>());
2784    __ Mov(destination.As<Register>(), IP);
2785  } else if (source.IsRegister() && destination.IsStackSlot()) {
2786    Exchange(source.As<Register>(), destination.GetStackIndex());
2787  } else if (source.IsStackSlot() && destination.IsRegister()) {
2788    Exchange(destination.As<Register>(), source.GetStackIndex());
2789  } else if (source.IsStackSlot() && destination.IsStackSlot()) {
2790    Exchange(source.GetStackIndex(), destination.GetStackIndex());
2791  } else {
2792    LOG(FATAL) << "Unimplemented";
2793  }
2794}
2795
2796void ParallelMoveResolverARM::SpillScratch(int reg) {
2797  __ Push(static_cast<Register>(reg));
2798}
2799
2800void ParallelMoveResolverARM::RestoreScratch(int reg) {
2801  __ Pop(static_cast<Register>(reg));
2802}
2803
2804void LocationsBuilderARM::VisitLoadClass(HLoadClass* cls) {
2805  LocationSummary::CallKind call_kind = cls->CanCallRuntime()
2806      ? LocationSummary::kCallOnSlowPath
2807      : LocationSummary::kNoCall;
2808  LocationSummary* locations =
2809      new (GetGraph()->GetArena()) LocationSummary(cls, call_kind);
2810  locations->SetOut(Location::RequiresRegister());
2811}
2812
2813void InstructionCodeGeneratorARM::VisitLoadClass(HLoadClass* cls) {
2814  Register out = cls->GetLocations()->Out().As<Register>();
2815  if (cls->IsReferrersClass()) {
2816    DCHECK(!cls->CanCallRuntime());
2817    DCHECK(!cls->MustGenerateClinitCheck());
2818    codegen_->LoadCurrentMethod(out);
2819    __ LoadFromOffset(kLoadWord, out, out, mirror::ArtMethod::DeclaringClassOffset().Int32Value());
2820  } else {
2821    DCHECK(cls->CanCallRuntime());
2822    codegen_->LoadCurrentMethod(out);
2823    __ LoadFromOffset(
2824        kLoadWord, out, out, mirror::ArtMethod::DexCacheResolvedTypesOffset().Int32Value());
2825    __ LoadFromOffset(kLoadWord, out, out, CodeGenerator::GetCacheOffset(cls->GetTypeIndex()));
2826
2827    SlowPathCodeARM* slow_path = new (GetGraph()->GetArena()) LoadClassSlowPathARM(
2828        cls, cls, cls->GetDexPc(), cls->MustGenerateClinitCheck());
2829    codegen_->AddSlowPath(slow_path);
2830    __ cmp(out, ShifterOperand(0));
2831    __ b(slow_path->GetEntryLabel(), EQ);
2832    if (cls->MustGenerateClinitCheck()) {
2833      GenerateClassInitializationCheck(slow_path, out);
2834    } else {
2835      __ Bind(slow_path->GetExitLabel());
2836    }
2837  }
2838}
2839
2840void LocationsBuilderARM::VisitClinitCheck(HClinitCheck* check) {
2841  LocationSummary* locations =
2842      new (GetGraph()->GetArena()) LocationSummary(check, LocationSummary::kCallOnSlowPath);
2843  locations->SetInAt(0, Location::RequiresRegister());
2844  if (check->HasUses()) {
2845    locations->SetOut(Location::SameAsFirstInput());
2846  }
2847}
2848
2849void InstructionCodeGeneratorARM::VisitClinitCheck(HClinitCheck* check) {
2850  // We assume the class is not null.
2851  SlowPathCodeARM* slow_path = new (GetGraph()->GetArena()) LoadClassSlowPathARM(
2852      check->GetLoadClass(), check, check->GetDexPc(), true);
2853  codegen_->AddSlowPath(slow_path);
2854  GenerateClassInitializationCheck(slow_path, check->GetLocations()->InAt(0).As<Register>());
2855}
2856
2857void InstructionCodeGeneratorARM::GenerateClassInitializationCheck(
2858    SlowPathCodeARM* slow_path, Register class_reg) {
2859  __ LoadFromOffset(kLoadWord, IP, class_reg, mirror::Class::StatusOffset().Int32Value());
2860  __ cmp(IP, ShifterOperand(mirror::Class::kStatusInitialized));
2861  __ b(slow_path->GetEntryLabel(), LT);
2862  // Even if the initialized flag is set, we may be in a situation where caches are not synced
2863  // properly. Therefore, we do a memory fence.
2864  __ dmb(ISH);
2865  __ Bind(slow_path->GetExitLabel());
2866}
2867
2868void LocationsBuilderARM::VisitStaticFieldGet(HStaticFieldGet* instruction) {
2869  LocationSummary* locations =
2870      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2871  locations->SetInAt(0, Location::RequiresRegister());
2872  locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
2873}
2874
2875void InstructionCodeGeneratorARM::VisitStaticFieldGet(HStaticFieldGet* instruction) {
2876  LocationSummary* locations = instruction->GetLocations();
2877  Register cls = locations->InAt(0).As<Register>();
2878  uint32_t offset = instruction->GetFieldOffset().Uint32Value();
2879
2880  switch (instruction->GetType()) {
2881    case Primitive::kPrimBoolean: {
2882      Register out = locations->Out().As<Register>();
2883      __ LoadFromOffset(kLoadUnsignedByte, out, cls, offset);
2884      break;
2885    }
2886
2887    case Primitive::kPrimByte: {
2888      Register out = locations->Out().As<Register>();
2889      __ LoadFromOffset(kLoadSignedByte, out, cls, offset);
2890      break;
2891    }
2892
2893    case Primitive::kPrimShort: {
2894      Register out = locations->Out().As<Register>();
2895      __ LoadFromOffset(kLoadSignedHalfword, out, cls, offset);
2896      break;
2897    }
2898
2899    case Primitive::kPrimChar: {
2900      Register out = locations->Out().As<Register>();
2901      __ LoadFromOffset(kLoadUnsignedHalfword, out, cls, offset);
2902      break;
2903    }
2904
2905    case Primitive::kPrimInt:
2906    case Primitive::kPrimNot: {
2907      Register out = locations->Out().As<Register>();
2908      __ LoadFromOffset(kLoadWord, out, cls, offset);
2909      break;
2910    }
2911
2912    case Primitive::kPrimLong: {
2913      // TODO: support volatile.
2914      Location out = locations->Out();
2915      __ LoadFromOffset(kLoadWordPair, out.AsRegisterPairLow<Register>(), cls, offset);
2916      break;
2917    }
2918
2919    case Primitive::kPrimFloat: {
2920      SRegister out = locations->Out().As<SRegister>();
2921      __ LoadSFromOffset(out, cls, offset);
2922      break;
2923    }
2924
2925    case Primitive::kPrimDouble: {
2926      DRegister out = FromLowSToD(locations->Out().AsFpuRegisterPairLow<SRegister>());
2927      __ LoadDFromOffset(out, cls, offset);
2928      break;
2929    }
2930
2931    case Primitive::kPrimVoid:
2932      LOG(FATAL) << "Unreachable type " << instruction->GetType();
2933      UNREACHABLE();
2934  }
2935}
2936
2937void LocationsBuilderARM::VisitStaticFieldSet(HStaticFieldSet* instruction) {
2938  LocationSummary* locations =
2939      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
2940  bool needs_write_barrier =
2941      CodeGenerator::StoreNeedsWriteBarrier(instruction->GetFieldType(), instruction->GetValue());
2942  locations->SetInAt(0, Location::RequiresRegister());
2943  locations->SetInAt(1, Location::RequiresRegister());
2944  // Temporary registers for the write barrier.
2945  if (needs_write_barrier) {
2946    locations->AddTemp(Location::RequiresRegister());
2947    locations->AddTemp(Location::RequiresRegister());
2948  }
2949}
2950
2951void InstructionCodeGeneratorARM::VisitStaticFieldSet(HStaticFieldSet* instruction) {
2952  LocationSummary* locations = instruction->GetLocations();
2953  Register cls = locations->InAt(0).As<Register>();
2954  uint32_t offset = instruction->GetFieldOffset().Uint32Value();
2955  Primitive::Type field_type = instruction->GetFieldType();
2956
2957  switch (field_type) {
2958    case Primitive::kPrimBoolean:
2959    case Primitive::kPrimByte: {
2960      Register value = locations->InAt(1).As<Register>();
2961      __ StoreToOffset(kStoreByte, value, cls, offset);
2962      break;
2963    }
2964
2965    case Primitive::kPrimShort:
2966    case Primitive::kPrimChar: {
2967      Register value = locations->InAt(1).As<Register>();
2968      __ StoreToOffset(kStoreHalfword, value, cls, offset);
2969      break;
2970    }
2971
2972    case Primitive::kPrimInt:
2973    case Primitive::kPrimNot: {
2974      Register value = locations->InAt(1).As<Register>();
2975      __ StoreToOffset(kStoreWord, value, cls, offset);
2976      if (CodeGenerator::StoreNeedsWriteBarrier(field_type, instruction->GetValue())) {
2977        Register temp = locations->GetTemp(0).As<Register>();
2978        Register card = locations->GetTemp(1).As<Register>();
2979        codegen_->MarkGCCard(temp, card, cls, value);
2980      }
2981      break;
2982    }
2983
2984    case Primitive::kPrimLong: {
2985      Location value = locations->InAt(1);
2986      __ StoreToOffset(kStoreWordPair, value.AsRegisterPairLow<Register>(), cls, offset);
2987      break;
2988    }
2989
2990    case Primitive::kPrimFloat: {
2991      SRegister value = locations->InAt(1).As<SRegister>();
2992      __ StoreSToOffset(value, cls, offset);
2993      break;
2994    }
2995
2996    case Primitive::kPrimDouble: {
2997      DRegister value = FromLowSToD(locations->InAt(1).AsFpuRegisterPairLow<SRegister>());
2998      __ StoreDToOffset(value, cls, offset);
2999      break;
3000    }
3001
3002    case Primitive::kPrimVoid:
3003      LOG(FATAL) << "Unreachable type " << field_type;
3004      UNREACHABLE();
3005  }
3006}
3007
3008void LocationsBuilderARM::VisitLoadString(HLoadString* load) {
3009  LocationSummary* locations =
3010      new (GetGraph()->GetArena()) LocationSummary(load, LocationSummary::kCallOnSlowPath);
3011  locations->SetOut(Location::RequiresRegister());
3012}
3013
3014void InstructionCodeGeneratorARM::VisitLoadString(HLoadString* load) {
3015  SlowPathCodeARM* slow_path = new (GetGraph()->GetArena()) LoadStringSlowPathARM(load);
3016  codegen_->AddSlowPath(slow_path);
3017
3018  Register out = load->GetLocations()->Out().As<Register>();
3019  codegen_->LoadCurrentMethod(out);
3020  __ LoadFromOffset(
3021      kLoadWord, out, out, mirror::ArtMethod::DexCacheStringsOffset().Int32Value());
3022  __ LoadFromOffset(kLoadWord, out, out, CodeGenerator::GetCacheOffset(load->GetStringIndex()));
3023  __ cmp(out, ShifterOperand(0));
3024  __ b(slow_path->GetEntryLabel(), EQ);
3025  __ Bind(slow_path->GetExitLabel());
3026}
3027
3028void LocationsBuilderARM::VisitLoadException(HLoadException* load) {
3029  LocationSummary* locations =
3030      new (GetGraph()->GetArena()) LocationSummary(load, LocationSummary::kNoCall);
3031  locations->SetOut(Location::RequiresRegister());
3032}
3033
3034void InstructionCodeGeneratorARM::VisitLoadException(HLoadException* load) {
3035  Register out = load->GetLocations()->Out().As<Register>();
3036  int32_t offset = Thread::ExceptionOffset<kArmWordSize>().Int32Value();
3037  __ LoadFromOffset(kLoadWord, out, TR, offset);
3038  __ LoadImmediate(IP, 0);
3039  __ StoreToOffset(kStoreWord, IP, TR, offset);
3040}
3041
3042void LocationsBuilderARM::VisitThrow(HThrow* instruction) {
3043  LocationSummary* locations =
3044      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kCall);
3045  InvokeRuntimeCallingConvention calling_convention;
3046  locations->SetInAt(0, Location::RegisterLocation(calling_convention.GetRegisterAt(0)));
3047}
3048
3049void InstructionCodeGeneratorARM::VisitThrow(HThrow* instruction) {
3050  codegen_->InvokeRuntime(
3051      QUICK_ENTRY_POINT(pDeliverException), instruction, instruction->GetDexPc());
3052}
3053
3054void LocationsBuilderARM::VisitInstanceOf(HInstanceOf* instruction) {
3055  LocationSummary::CallKind call_kind = instruction->IsClassFinal()
3056      ? LocationSummary::kNoCall
3057      : LocationSummary::kCallOnSlowPath;
3058  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instruction, call_kind);
3059  locations->SetInAt(0, Location::RequiresRegister());
3060  locations->SetInAt(1, Location::RequiresRegister());
3061  locations->SetOut(Location::RequiresRegister());
3062}
3063
3064void InstructionCodeGeneratorARM::VisitInstanceOf(HInstanceOf* instruction) {
3065  LocationSummary* locations = instruction->GetLocations();
3066  Register obj = locations->InAt(0).As<Register>();
3067  Register cls = locations->InAt(1).As<Register>();
3068  Register out = locations->Out().As<Register>();
3069  uint32_t class_offset = mirror::Object::ClassOffset().Int32Value();
3070  Label done, zero;
3071  SlowPathCodeARM* slow_path = nullptr;
3072
3073  // Return 0 if `obj` is null.
3074  // TODO: avoid this check if we know obj is not null.
3075  __ cmp(obj, ShifterOperand(0));
3076  __ b(&zero, EQ);
3077  // Compare the class of `obj` with `cls`.
3078  __ LoadFromOffset(kLoadWord, out, obj, class_offset);
3079  __ cmp(out, ShifterOperand(cls));
3080  if (instruction->IsClassFinal()) {
3081    // Classes must be equal for the instanceof to succeed.
3082    __ b(&zero, NE);
3083    __ LoadImmediate(out, 1);
3084    __ b(&done);
3085  } else {
3086    // If the classes are not equal, we go into a slow path.
3087    DCHECK(locations->OnlyCallsOnSlowPath());
3088    slow_path = new (GetGraph()->GetArena()) TypeCheckSlowPathARM(
3089        instruction, locations->InAt(1), locations->Out(), instruction->GetDexPc());
3090    codegen_->AddSlowPath(slow_path);
3091    __ b(slow_path->GetEntryLabel(), NE);
3092    __ LoadImmediate(out, 1);
3093    __ b(&done);
3094  }
3095  __ Bind(&zero);
3096  __ LoadImmediate(out, 0);
3097  if (slow_path != nullptr) {
3098    __ Bind(slow_path->GetExitLabel());
3099  }
3100  __ Bind(&done);
3101}
3102
3103void LocationsBuilderARM::VisitCheckCast(HCheckCast* instruction) {
3104  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(
3105      instruction, LocationSummary::kCallOnSlowPath);
3106  locations->SetInAt(0, Location::RequiresRegister());
3107  locations->SetInAt(1, Location::RequiresRegister());
3108  locations->AddTemp(Location::RequiresRegister());
3109}
3110
3111void InstructionCodeGeneratorARM::VisitCheckCast(HCheckCast* instruction) {
3112  LocationSummary* locations = instruction->GetLocations();
3113  Register obj = locations->InAt(0).As<Register>();
3114  Register cls = locations->InAt(1).As<Register>();
3115  Register temp = locations->GetTemp(0).As<Register>();
3116  uint32_t class_offset = mirror::Object::ClassOffset().Int32Value();
3117
3118  SlowPathCodeARM* slow_path = new (GetGraph()->GetArena()) TypeCheckSlowPathARM(
3119      instruction, locations->InAt(1), locations->GetTemp(0), instruction->GetDexPc());
3120  codegen_->AddSlowPath(slow_path);
3121
3122  // TODO: avoid this check if we know obj is not null.
3123  __ cmp(obj, ShifterOperand(0));
3124  __ b(slow_path->GetExitLabel(), EQ);
3125  // Compare the class of `obj` with `cls`.
3126  __ LoadFromOffset(kLoadWord, temp, obj, class_offset);
3127  __ cmp(temp, ShifterOperand(cls));
3128  __ b(slow_path->GetEntryLabel(), NE);
3129  __ Bind(slow_path->GetExitLabel());
3130}
3131
3132void LocationsBuilderARM::VisitMonitorOperation(HMonitorOperation* instruction) {
3133  LocationSummary* locations =
3134      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kCall);
3135  InvokeRuntimeCallingConvention calling_convention;
3136  locations->SetInAt(0, Location::RegisterLocation(calling_convention.GetRegisterAt(0)));
3137}
3138
3139void InstructionCodeGeneratorARM::VisitMonitorOperation(HMonitorOperation* instruction) {
3140  codegen_->InvokeRuntime(instruction->IsEnter()
3141        ? QUICK_ENTRY_POINT(pLockObject) : QUICK_ENTRY_POINT(pUnlockObject),
3142      instruction,
3143      instruction->GetDexPc());
3144}
3145
3146void LocationsBuilderARM::VisitAnd(HAnd* instruction) { HandleBitwiseOperation(instruction); }
3147void LocationsBuilderARM::VisitOr(HOr* instruction) { HandleBitwiseOperation(instruction); }
3148void LocationsBuilderARM::VisitXor(HXor* instruction) { HandleBitwiseOperation(instruction); }
3149
3150void LocationsBuilderARM::HandleBitwiseOperation(HBinaryOperation* instruction) {
3151  LocationSummary* locations =
3152      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
3153  DCHECK(instruction->GetResultType() == Primitive::kPrimInt
3154         || instruction->GetResultType() == Primitive::kPrimLong);
3155  locations->SetInAt(0, Location::RequiresRegister());
3156  locations->SetInAt(1, Location::RequiresRegister());
3157  bool output_overlaps = (instruction->GetResultType() == Primitive::kPrimLong);
3158  locations->SetOut(Location::RequiresRegister(), output_overlaps);
3159}
3160
3161void InstructionCodeGeneratorARM::VisitAnd(HAnd* instruction) {
3162  HandleBitwiseOperation(instruction);
3163}
3164
3165void InstructionCodeGeneratorARM::VisitOr(HOr* instruction) {
3166  HandleBitwiseOperation(instruction);
3167}
3168
3169void InstructionCodeGeneratorARM::VisitXor(HXor* instruction) {
3170  HandleBitwiseOperation(instruction);
3171}
3172
3173void InstructionCodeGeneratorARM::HandleBitwiseOperation(HBinaryOperation* instruction) {
3174  LocationSummary* locations = instruction->GetLocations();
3175
3176  if (instruction->GetResultType() == Primitive::kPrimInt) {
3177    Register first = locations->InAt(0).As<Register>();
3178    Register second = locations->InAt(1).As<Register>();
3179    Register out = locations->Out().As<Register>();
3180    if (instruction->IsAnd()) {
3181      __ and_(out, first, ShifterOperand(second));
3182    } else if (instruction->IsOr()) {
3183      __ orr(out, first, ShifterOperand(second));
3184    } else {
3185      DCHECK(instruction->IsXor());
3186      __ eor(out, first, ShifterOperand(second));
3187    }
3188  } else {
3189    DCHECK_EQ(instruction->GetResultType(), Primitive::kPrimLong);
3190    Location first = locations->InAt(0);
3191    Location second = locations->InAt(1);
3192    Location out = locations->Out();
3193    if (instruction->IsAnd()) {
3194      __ and_(out.AsRegisterPairLow<Register>(),
3195              first.AsRegisterPairLow<Register>(),
3196              ShifterOperand(second.AsRegisterPairLow<Register>()));
3197      __ and_(out.AsRegisterPairHigh<Register>(),
3198              first.AsRegisterPairHigh<Register>(),
3199              ShifterOperand(second.AsRegisterPairHigh<Register>()));
3200    } else if (instruction->IsOr()) {
3201      __ orr(out.AsRegisterPairLow<Register>(),
3202             first.AsRegisterPairLow<Register>(),
3203             ShifterOperand(second.AsRegisterPairLow<Register>()));
3204      __ orr(out.AsRegisterPairHigh<Register>(),
3205             first.AsRegisterPairHigh<Register>(),
3206             ShifterOperand(second.AsRegisterPairHigh<Register>()));
3207    } else {
3208      DCHECK(instruction->IsXor());
3209      __ eor(out.AsRegisterPairLow<Register>(),
3210             first.AsRegisterPairLow<Register>(),
3211             ShifterOperand(second.AsRegisterPairLow<Register>()));
3212      __ eor(out.AsRegisterPairHigh<Register>(),
3213             first.AsRegisterPairHigh<Register>(),
3214             ShifterOperand(second.AsRegisterPairHigh<Register>()));
3215    }
3216  }
3217}
3218
3219}  // namespace arm
3220}  // namespace art
3221