code_generator_arm64.cc revision 4a962e5373bc0992d6e9ba6a43bb65845e7a8783 
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_arm64.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/arm64/assembler_arm64.h"
26#include "utils/assembler.h"
27#include "utils/stack_checks.h"
28
29
30using namespace vixl;   // NOLINT(build/namespaces)
31
32#ifdef __
33#error "ARM64 Codegen VIXL macro-assembler macro already defined."
34#endif
35
36
37namespace art {
38
39namespace arm64 {
40
41// TODO: clean-up some of the constant definitions.
42static constexpr size_t kHeapRefSize = sizeof(mirror::HeapReference<mirror::Object>);
43static constexpr int kCurrentMethodStackOffset = 0;
44
45namespace {
46
47bool IsFPType(Primitive::Type type) {
48  return type == Primitive::kPrimFloat || type == Primitive::kPrimDouble;
49}
50
51bool IsIntegralType(Primitive::Type type) {
52  switch (type) {
53    case Primitive::kPrimByte:
54    case Primitive::kPrimChar:
55    case Primitive::kPrimShort:
56    case Primitive::kPrimInt:
57    case Primitive::kPrimLong:
58      return true;
59    default:
60      return false;
61  }
62}
63
64bool Is64BitType(Primitive::Type type) {
65  return type == Primitive::kPrimLong || type == Primitive::kPrimDouble;
66}
67
68// Convenience helpers to ease conversion to and from VIXL operands.
69static_assert((SP == 31) && (WSP == 31) && (XZR == 32) && (WZR == 32),
70              "Unexpected values for register codes.");
71
72int VIXLRegCodeFromART(int code) {
73  if (code == SP) {
74    return vixl::kSPRegInternalCode;
75  }
76  if (code == XZR) {
77    return vixl::kZeroRegCode;
78  }
79  return code;
80}
81
82int ARTRegCodeFromVIXL(int code) {
83  if (code == vixl::kSPRegInternalCode) {
84    return SP;
85  }
86  if (code == vixl::kZeroRegCode) {
87    return XZR;
88  }
89  return code;
90}
91
92Register XRegisterFrom(Location location) {
93  return Register::XRegFromCode(VIXLRegCodeFromART(location.reg()));
94}
95
96Register WRegisterFrom(Location location) {
97  return Register::WRegFromCode(VIXLRegCodeFromART(location.reg()));
98}
99
100Register RegisterFrom(Location location, Primitive::Type type) {
101  DCHECK(type != Primitive::kPrimVoid && !IsFPType(type));
102  return type == Primitive::kPrimLong ? XRegisterFrom(location) : WRegisterFrom(location);
103}
104
105Register OutputRegister(HInstruction* instr) {
106  return RegisterFrom(instr->GetLocations()->Out(), instr->GetType());
107}
108
109Register InputRegisterAt(HInstruction* instr, int input_index) {
110  return RegisterFrom(instr->GetLocations()->InAt(input_index),
111                      instr->InputAt(input_index)->GetType());
112}
113
114FPRegister DRegisterFrom(Location location) {
115  return FPRegister::DRegFromCode(location.reg());
116}
117
118FPRegister SRegisterFrom(Location location) {
119  return FPRegister::SRegFromCode(location.reg());
120}
121
122FPRegister FPRegisterFrom(Location location, Primitive::Type type) {
123  DCHECK(IsFPType(type));
124  return type == Primitive::kPrimDouble ? DRegisterFrom(location) : SRegisterFrom(location);
125}
126
127FPRegister OutputFPRegister(HInstruction* instr) {
128  return FPRegisterFrom(instr->GetLocations()->Out(), instr->GetType());
129}
130
131FPRegister InputFPRegisterAt(HInstruction* instr, int input_index) {
132  return FPRegisterFrom(instr->GetLocations()->InAt(input_index),
133                        instr->InputAt(input_index)->GetType());
134}
135
136CPURegister OutputCPURegister(HInstruction* instr) {
137  return IsFPType(instr->GetType()) ? static_cast<CPURegister>(OutputFPRegister(instr))
138                                    : static_cast<CPURegister>(OutputRegister(instr));
139}
140
141CPURegister InputCPURegisterAt(HInstruction* instr, int index) {
142  return IsFPType(instr->InputAt(index)->GetType())
143      ? static_cast<CPURegister>(InputFPRegisterAt(instr, index))
144      : static_cast<CPURegister>(InputRegisterAt(instr, index));
145}
146
147int64_t Int64ConstantFrom(Location location) {
148  HConstant* instr = location.GetConstant();
149  return instr->IsIntConstant() ? instr->AsIntConstant()->GetValue()
150                                : instr->AsLongConstant()->GetValue();
151}
152
153Operand OperandFrom(Location location, Primitive::Type type) {
154  if (location.IsRegister()) {
155    return Operand(RegisterFrom(location, type));
156  } else {
157    return Operand(Int64ConstantFrom(location));
158  }
159}
160
161Operand InputOperandAt(HInstruction* instr, int input_index) {
162  return OperandFrom(instr->GetLocations()->InAt(input_index),
163                     instr->InputAt(input_index)->GetType());
164}
165
166MemOperand StackOperandFrom(Location location) {
167  return MemOperand(sp, location.GetStackIndex());
168}
169
170MemOperand HeapOperand(const Register& base, size_t offset) {
171  // A heap reference must be 32bit, so fit in a W register.
172  DCHECK(base.IsW());
173  return MemOperand(base.X(), offset);
174}
175
176MemOperand HeapOperand(const Register& base, Offset offset) {
177  return HeapOperand(base, offset.SizeValue());
178}
179
180MemOperand HeapOperandFrom(Location location, Offset offset) {
181  return HeapOperand(RegisterFrom(location, Primitive::kPrimNot), offset);
182}
183
184Location LocationFrom(const Register& reg) {
185  return Location::RegisterLocation(ARTRegCodeFromVIXL(reg.code()));
186}
187
188Location LocationFrom(const FPRegister& fpreg) {
189  return Location::FpuRegisterLocation(fpreg.code());
190}
191
192}  // namespace
193
194inline Condition ARM64Condition(IfCondition cond) {
195  switch (cond) {
196    case kCondEQ: return eq;
197    case kCondNE: return ne;
198    case kCondLT: return lt;
199    case kCondLE: return le;
200    case kCondGT: return gt;
201    case kCondGE: return ge;
202    default:
203      LOG(FATAL) << "Unknown if condition";
204  }
205  return nv;  // Unreachable.
206}
207
208Location ARM64ReturnLocation(Primitive::Type return_type) {
209  DCHECK_NE(return_type, Primitive::kPrimVoid);
210  // Note that in practice, `LocationFrom(x0)` and `LocationFrom(w0)` create the
211  // same Location object, and so do `LocationFrom(d0)` and `LocationFrom(s0)`,
212  // but we use the exact registers for clarity.
213  if (return_type == Primitive::kPrimFloat) {
214    return LocationFrom(s0);
215  } else if (return_type == Primitive::kPrimDouble) {
216    return LocationFrom(d0);
217  } else if (return_type == Primitive::kPrimLong) {
218    return LocationFrom(x0);
219  } else {
220    return LocationFrom(w0);
221  }
222}
223
224static const Register kRuntimeParameterCoreRegisters[] = { x0, x1, x2, x3, x4, x5, x6, x7 };
225static constexpr size_t kRuntimeParameterCoreRegistersLength =
226    arraysize(kRuntimeParameterCoreRegisters);
227static const FPRegister kRuntimeParameterFpuRegisters[] = { };
228static constexpr size_t kRuntimeParameterFpuRegistersLength = 0;
229
230class InvokeRuntimeCallingConvention : public CallingConvention<Register, FPRegister> {
231 public:
232  static constexpr size_t kParameterCoreRegistersLength = arraysize(kParameterCoreRegisters);
233
234  InvokeRuntimeCallingConvention()
235      : CallingConvention(kRuntimeParameterCoreRegisters,
236                          kRuntimeParameterCoreRegistersLength,
237                          kRuntimeParameterFpuRegisters,
238                          kRuntimeParameterFpuRegistersLength) {}
239
240  Location GetReturnLocation(Primitive::Type return_type);
241
242 private:
243  DISALLOW_COPY_AND_ASSIGN(InvokeRuntimeCallingConvention);
244};
245
246Location InvokeRuntimeCallingConvention::GetReturnLocation(Primitive::Type return_type) {
247  return ARM64ReturnLocation(return_type);
248}
249
250#define __ down_cast<CodeGeneratorARM64*>(codegen)->GetVIXLAssembler()->
251#define QUICK_ENTRY_POINT(x) QUICK_ENTRYPOINT_OFFSET(kArm64WordSize, x).Int32Value()
252
253class SlowPathCodeARM64 : public SlowPathCode {
254 public:
255  SlowPathCodeARM64() : entry_label_(), exit_label_() {}
256
257  vixl::Label* GetEntryLabel() { return &entry_label_; }
258  vixl::Label* GetExitLabel() { return &exit_label_; }
259
260 private:
261  vixl::Label entry_label_;
262  vixl::Label exit_label_;
263
264  DISALLOW_COPY_AND_ASSIGN(SlowPathCodeARM64);
265};
266
267class BoundsCheckSlowPathARM64 : public SlowPathCodeARM64 {
268 public:
269  BoundsCheckSlowPathARM64() {}
270
271  void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
272    __ Bind(GetEntryLabel());
273    __ Brk(__LINE__);  // TODO: Unimplemented BoundsCheckSlowPathARM64.
274  }
275
276 private:
277  DISALLOW_COPY_AND_ASSIGN(BoundsCheckSlowPathARM64);
278};
279
280class DivZeroCheckSlowPathARM64 : public SlowPathCodeARM64 {
281 public:
282  explicit DivZeroCheckSlowPathARM64(HDivZeroCheck* instruction) : instruction_(instruction) {}
283
284  void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
285    CodeGeneratorARM64* arm64_codegen = down_cast<CodeGeneratorARM64*>(codegen);
286    __ Bind(GetEntryLabel());
287    arm64_codegen->InvokeRuntime(
288        QUICK_ENTRY_POINT(pThrowDivZero), instruction_, instruction_->GetDexPc());
289  }
290
291 private:
292  HDivZeroCheck* const instruction_;
293  DISALLOW_COPY_AND_ASSIGN(DivZeroCheckSlowPathARM64);
294};
295
296class LoadClassSlowPathARM64 : public SlowPathCodeARM64 {
297 public:
298  LoadClassSlowPathARM64(HLoadClass* cls,
299                         HInstruction* at,
300                         uint32_t dex_pc,
301                         bool do_clinit)
302      : cls_(cls), at_(at), dex_pc_(dex_pc), do_clinit_(do_clinit) {
303    DCHECK(at->IsLoadClass() || at->IsClinitCheck());
304  }
305
306  void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
307    LocationSummary* locations = at_->GetLocations();
308    CodeGeneratorARM64* arm64_codegen = down_cast<CodeGeneratorARM64*>(codegen);
309
310    __ Bind(GetEntryLabel());
311    codegen->SaveLiveRegisters(locations);
312
313    InvokeRuntimeCallingConvention calling_convention;
314    __ Mov(calling_convention.GetRegisterAt(0).W(), cls_->GetTypeIndex());
315    arm64_codegen->LoadCurrentMethod(calling_convention.GetRegisterAt(1).W());
316    int32_t entry_point_offset = do_clinit_ ? QUICK_ENTRY_POINT(pInitializeStaticStorage)
317                                            : QUICK_ENTRY_POINT(pInitializeType);
318    arm64_codegen->InvokeRuntime(entry_point_offset, at_, dex_pc_);
319
320    // Move the class to the desired location.
321    Location out = locations->Out();
322    if (out.IsValid()) {
323      DCHECK(out.IsRegister() && !locations->GetLiveRegisters()->ContainsCoreRegister(out.reg()));
324      Primitive::Type type = at_->GetType();
325      arm64_codegen->MoveHelper(out, calling_convention.GetReturnLocation(type), type);
326    }
327
328    codegen->RestoreLiveRegisters(locations);
329    __ B(GetExitLabel());
330  }
331
332 private:
333  // The class this slow path will load.
334  HLoadClass* const cls_;
335
336  // The instruction where this slow path is happening.
337  // (Might be the load class or an initialization check).
338  HInstruction* const at_;
339
340  // The dex PC of `at_`.
341  const uint32_t dex_pc_;
342
343  // Whether to initialize the class.
344  const bool do_clinit_;
345
346  DISALLOW_COPY_AND_ASSIGN(LoadClassSlowPathARM64);
347};
348
349class LoadStringSlowPathARM64 : public SlowPathCodeARM64 {
350 public:
351  explicit LoadStringSlowPathARM64(HLoadString* instruction) : instruction_(instruction) {}
352
353  void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
354    LocationSummary* locations = instruction_->GetLocations();
355    DCHECK(!locations->GetLiveRegisters()->ContainsCoreRegister(locations->Out().reg()));
356    CodeGeneratorARM64* arm64_codegen = down_cast<CodeGeneratorARM64*>(codegen);
357
358    __ Bind(GetEntryLabel());
359    codegen->SaveLiveRegisters(locations);
360
361    InvokeRuntimeCallingConvention calling_convention;
362    arm64_codegen->LoadCurrentMethod(calling_convention.GetRegisterAt(0).W());
363    __ Mov(calling_convention.GetRegisterAt(1).W(), instruction_->GetStringIndex());
364    arm64_codegen->InvokeRuntime(
365        QUICK_ENTRY_POINT(pResolveString), instruction_, instruction_->GetDexPc());
366    Primitive::Type type = instruction_->GetType();
367    arm64_codegen->MoveHelper(locations->Out(), calling_convention.GetReturnLocation(type), type);
368
369    codegen->RestoreLiveRegisters(locations);
370    __ B(GetExitLabel());
371  }
372
373 private:
374  HLoadString* const instruction_;
375
376  DISALLOW_COPY_AND_ASSIGN(LoadStringSlowPathARM64);
377};
378
379class NullCheckSlowPathARM64 : public SlowPathCodeARM64 {
380 public:
381  explicit NullCheckSlowPathARM64(HNullCheck* instr) : instruction_(instr) {}
382
383  void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
384    CodeGeneratorARM64* arm64_codegen = down_cast<CodeGeneratorARM64*>(codegen);
385    __ Bind(GetEntryLabel());
386    arm64_codegen->InvokeRuntime(
387        QUICK_ENTRY_POINT(pThrowNullPointer), instruction_, instruction_->GetDexPc());
388  }
389
390 private:
391  HNullCheck* const instruction_;
392
393  DISALLOW_COPY_AND_ASSIGN(NullCheckSlowPathARM64);
394};
395
396class SuspendCheckSlowPathARM64 : public SlowPathCodeARM64 {
397 public:
398  explicit SuspendCheckSlowPathARM64(HSuspendCheck* instruction,
399                                     HBasicBlock* successor)
400      : instruction_(instruction), successor_(successor) {}
401
402  void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
403    CodeGeneratorARM64* arm64_codegen = down_cast<CodeGeneratorARM64*>(codegen);
404    __ Bind(GetEntryLabel());
405    codegen->SaveLiveRegisters(instruction_->GetLocations());
406    arm64_codegen->InvokeRuntime(
407        QUICK_ENTRY_POINT(pTestSuspend), instruction_, instruction_->GetDexPc());
408    codegen->RestoreLiveRegisters(instruction_->GetLocations());
409    if (successor_ == nullptr) {
410      __ B(GetReturnLabel());
411    } else {
412      __ B(arm64_codegen->GetLabelOf(successor_));
413    }
414  }
415
416  vixl::Label* GetReturnLabel() {
417    DCHECK(successor_ == nullptr);
418    return &return_label_;
419  }
420
421
422 private:
423  HSuspendCheck* const instruction_;
424  // If not null, the block to branch to after the suspend check.
425  HBasicBlock* const successor_;
426
427  // If `successor_` is null, the label to branch to after the suspend check.
428  vixl::Label return_label_;
429
430  DISALLOW_COPY_AND_ASSIGN(SuspendCheckSlowPathARM64);
431};
432
433class TypeCheckSlowPathARM64 : public SlowPathCodeARM64 {
434 public:
435  TypeCheckSlowPathARM64() {}
436
437  void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
438    __ Bind(GetEntryLabel());
439    __ Brk(__LINE__);  // TODO: Unimplemented TypeCheckSlowPathARM64.
440    __ b(GetExitLabel());
441  }
442
443 private:
444  DISALLOW_COPY_AND_ASSIGN(TypeCheckSlowPathARM64);
445};
446
447#undef __
448
449Location InvokeDexCallingConventionVisitor::GetNextLocation(Primitive::Type type) {
450  Location next_location;
451  if (type == Primitive::kPrimVoid) {
452    LOG(FATAL) << "Unreachable type " << type;
453  }
454
455  if (IsFPType(type) && (fp_index_ < calling_convention.GetNumberOfFpuRegisters())) {
456    next_location = LocationFrom(calling_convention.GetFpuRegisterAt(fp_index_++));
457  } else if (!IsFPType(type) && (gp_index_ < calling_convention.GetNumberOfRegisters())) {
458    next_location = LocationFrom(calling_convention.GetRegisterAt(gp_index_++));
459  } else {
460    size_t stack_offset = calling_convention.GetStackOffsetOf(stack_index_);
461    next_location = Is64BitType(type) ? Location::DoubleStackSlot(stack_offset)
462                                      : Location::StackSlot(stack_offset);
463  }
464
465  // Space on the stack is reserved for all arguments.
466  stack_index_ += Is64BitType(type) ? 2 : 1;
467  return next_location;
468}
469
470CodeGeneratorARM64::CodeGeneratorARM64(HGraph* graph)
471    : CodeGenerator(graph,
472                    kNumberOfAllocatableRegisters,
473                    kNumberOfAllocatableFPRegisters,
474                    kNumberOfAllocatableRegisterPairs),
475      block_labels_(nullptr),
476      location_builder_(graph, this),
477      instruction_visitor_(graph, this) {}
478
479#undef __
480#define __ GetVIXLAssembler()->
481
482void CodeGeneratorARM64::GenerateFrameEntry() {
483  // TODO: Add proper support for the stack overflow check.
484  UseScratchRegisterScope temps(GetVIXLAssembler());
485  Register temp = temps.AcquireX();
486  __ Add(temp, sp, -static_cast<int32_t>(GetStackOverflowReservedBytes(kArm64)));
487  __ Ldr(temp, MemOperand(temp, 0));
488  RecordPcInfo(nullptr, 0);
489
490  CPURegList preserved_regs = GetFramePreservedRegisters();
491  int frame_size = GetFrameSize();
492  core_spill_mask_ |= preserved_regs.list();
493
494  __ Str(w0, MemOperand(sp, -frame_size, PreIndex));
495  __ PokeCPURegList(preserved_regs, frame_size - preserved_regs.TotalSizeInBytes());
496
497  // Stack layout:
498  // sp[frame_size - 8]        : lr.
499  // ...                       : other preserved registers.
500  // sp[frame_size - regs_size]: first preserved register.
501  // ...                       : reserved frame space.
502  // sp[0]                     : current method.
503}
504
505void CodeGeneratorARM64::GenerateFrameExit() {
506  int frame_size = GetFrameSize();
507  CPURegList preserved_regs = GetFramePreservedRegisters();
508  __ PeekCPURegList(preserved_regs, frame_size - preserved_regs.TotalSizeInBytes());
509  __ Drop(frame_size);
510}
511
512void CodeGeneratorARM64::Bind(HBasicBlock* block) {
513  __ Bind(GetLabelOf(block));
514}
515
516void CodeGeneratorARM64::Move(HInstruction* instruction,
517                              Location location,
518                              HInstruction* move_for) {
519  LocationSummary* locations = instruction->GetLocations();
520  if (locations != nullptr && locations->Out().Equals(location)) {
521    return;
522  }
523
524  Primitive::Type type = instruction->GetType();
525  DCHECK_NE(type, Primitive::kPrimVoid);
526
527  if (instruction->IsIntConstant() || instruction->IsLongConstant()) {
528    int64_t value = instruction->IsIntConstant() ? instruction->AsIntConstant()->GetValue()
529                                                 : instruction->AsLongConstant()->GetValue();
530    if (location.IsRegister()) {
531      Register dst = RegisterFrom(location, type);
532      DCHECK((instruction->IsIntConstant() && dst.Is32Bits()) ||
533             (instruction->IsLongConstant() && dst.Is64Bits()));
534      __ Mov(dst, value);
535    } else {
536      DCHECK(location.IsStackSlot() || location.IsDoubleStackSlot());
537      UseScratchRegisterScope temps(GetVIXLAssembler());
538      Register temp = instruction->IsIntConstant() ? temps.AcquireW() : temps.AcquireX();
539      __ Mov(temp, value);
540      __ Str(temp, StackOperandFrom(location));
541    }
542  } else if (instruction->IsTemporary()) {
543    Location temp_location = GetTemporaryLocation(instruction->AsTemporary());
544    MoveHelper(location, temp_location, type);
545  } else if (instruction->IsLoadLocal()) {
546    uint32_t stack_slot = GetStackSlot(instruction->AsLoadLocal()->GetLocal());
547    if (Is64BitType(type)) {
548      MoveHelper(location, Location::DoubleStackSlot(stack_slot), type);
549    } else {
550      MoveHelper(location, Location::StackSlot(stack_slot), type);
551    }
552
553  } else {
554    DCHECK((instruction->GetNext() == move_for) || instruction->GetNext()->IsTemporary());
555    MoveHelper(location, locations->Out(), type);
556  }
557}
558
559size_t CodeGeneratorARM64::FrameEntrySpillSize() const {
560  return GetFramePreservedRegistersSize();
561}
562
563Location CodeGeneratorARM64::GetStackLocation(HLoadLocal* load) const {
564  Primitive::Type type = load->GetType();
565
566  switch (type) {
567    case Primitive::kPrimNot:
568    case Primitive::kPrimInt:
569    case Primitive::kPrimFloat:
570      return Location::StackSlot(GetStackSlot(load->GetLocal()));
571
572    case Primitive::kPrimLong:
573    case Primitive::kPrimDouble:
574      return Location::DoubleStackSlot(GetStackSlot(load->GetLocal()));
575
576    case Primitive::kPrimBoolean:
577    case Primitive::kPrimByte:
578    case Primitive::kPrimChar:
579    case Primitive::kPrimShort:
580    case Primitive::kPrimVoid:
581      LOG(FATAL) << "Unexpected type " << type;
582  }
583
584  LOG(FATAL) << "Unreachable";
585  return Location::NoLocation();
586}
587
588void CodeGeneratorARM64::MarkGCCard(Register object, Register value) {
589  UseScratchRegisterScope temps(GetVIXLAssembler());
590  Register card = temps.AcquireX();
591  Register temp = temps.AcquireX();
592  vixl::Label done;
593  __ Cbz(value, &done);
594  __ Ldr(card, MemOperand(tr, Thread::CardTableOffset<kArm64WordSize>().Int32Value()));
595  __ Lsr(temp, object, gc::accounting::CardTable::kCardShift);
596  __ Strb(card, MemOperand(card, temp));
597  __ Bind(&done);
598}
599
600void CodeGeneratorARM64::SetupBlockedRegisters() const {
601  // Block reserved registers:
602  //   ip0 (VIXL temporary)
603  //   ip1 (VIXL temporary)
604  //   xSuspend (Suspend counter)
605  //   lr
606  // sp is not part of the allocatable registers, so we don't need to block it.
607  // TODO: Avoid blocking callee-saved registers, and instead preserve them
608  // where necessary.
609  CPURegList reserved_core_registers = vixl_reserved_core_registers;
610  reserved_core_registers.Combine(runtime_reserved_core_registers);
611  reserved_core_registers.Combine(quick_callee_saved_registers);
612  while (!reserved_core_registers.IsEmpty()) {
613    blocked_core_registers_[reserved_core_registers.PopLowestIndex().code()] = true;
614  }
615  CPURegList reserved_fp_registers = vixl_reserved_fp_registers;
616  reserved_fp_registers.Combine(CPURegList::GetCalleeSavedFP());
617  while (!reserved_core_registers.IsEmpty()) {
618    blocked_fpu_registers_[reserved_fp_registers.PopLowestIndex().code()] = true;
619  }
620}
621
622Location CodeGeneratorARM64::AllocateFreeRegister(Primitive::Type type) const {
623  if (type == Primitive::kPrimVoid) {
624    LOG(FATAL) << "Unreachable type " << type;
625  }
626
627  if (IsFPType(type)) {
628    ssize_t reg = FindFreeEntry(blocked_fpu_registers_, kNumberOfAllocatableFPRegisters);
629    DCHECK_NE(reg, -1);
630    return Location::FpuRegisterLocation(reg);
631  } else {
632    ssize_t reg = FindFreeEntry(blocked_core_registers_, kNumberOfAllocatableRegisters);
633    DCHECK_NE(reg, -1);
634    return Location::RegisterLocation(reg);
635  }
636}
637
638void CodeGeneratorARM64::DumpCoreRegister(std::ostream& stream, int reg) const {
639  stream << Arm64ManagedRegister::FromXRegister(XRegister(reg));
640}
641
642void CodeGeneratorARM64::DumpFloatingPointRegister(std::ostream& stream, int reg) const {
643  stream << Arm64ManagedRegister::FromDRegister(DRegister(reg));
644}
645
646void CodeGeneratorARM64::MoveConstant(CPURegister destination, HConstant* constant) {
647  if (constant->IsIntConstant() || constant->IsLongConstant()) {
648    __ Mov(Register(destination),
649           constant->IsIntConstant() ? constant->AsIntConstant()->GetValue()
650                                     : constant->AsLongConstant()->GetValue());
651  } else if (constant->IsFloatConstant()) {
652    __ Fmov(FPRegister(destination), constant->AsFloatConstant()->GetValue());
653  } else {
654    DCHECK(constant->IsDoubleConstant());
655    __ Fmov(FPRegister(destination), constant->AsDoubleConstant()->GetValue());
656  }
657}
658
659void CodeGeneratorARM64::MoveHelper(Location destination,
660                                    Location source,
661                                    Primitive::Type type) {
662  if (source.Equals(destination)) {
663    return;
664  }
665  if (destination.IsRegister()) {
666    Register dst = RegisterFrom(destination, type);
667    if (source.IsStackSlot() || source.IsDoubleStackSlot()) {
668      DCHECK(dst.Is64Bits() == source.IsDoubleStackSlot());
669      __ Ldr(dst, StackOperandFrom(source));
670    } else {
671      __ Mov(dst, OperandFrom(source, type));
672    }
673  } else if (destination.IsFpuRegister()) {
674    FPRegister dst = FPRegisterFrom(destination, type);
675    if (source.IsStackSlot() || source.IsDoubleStackSlot()) {
676      DCHECK(dst.Is64Bits() == source.IsDoubleStackSlot());
677      __ Ldr(dst, StackOperandFrom(source));
678    } else if (source.IsFpuRegister()) {
679      __ Fmov(dst, FPRegisterFrom(source, type));
680    } else {
681      MoveConstant(dst, source.GetConstant());
682    }
683  } else {
684    DCHECK(destination.IsStackSlot() || destination.IsDoubleStackSlot());
685    if (source.IsRegister()) {
686      __ Str(RegisterFrom(source, type), StackOperandFrom(destination));
687    } else if (source.IsFpuRegister()) {
688      __ Str(FPRegisterFrom(source, type), StackOperandFrom(destination));
689    } else if (source.IsConstant()) {
690      UseScratchRegisterScope temps(GetVIXLAssembler());
691      HConstant* cst = source.GetConstant();
692      CPURegister temp;
693      if (cst->IsIntConstant() || cst->IsLongConstant()) {
694        temp = cst->IsIntConstant() ? temps.AcquireW() : temps.AcquireX();
695      } else {
696        DCHECK(cst->IsFloatConstant() || cst->IsDoubleConstant());
697        temp = cst->IsFloatConstant() ? temps.AcquireS() : temps.AcquireD();
698      }
699      MoveConstant(temp, cst);
700      __ Str(temp, StackOperandFrom(destination));
701    } else {
702      DCHECK(source.IsStackSlot() || source.IsDoubleStackSlot());
703      UseScratchRegisterScope temps(GetVIXLAssembler());
704      Register temp = destination.IsDoubleStackSlot() ? temps.AcquireX() : temps.AcquireW();
705      __ Ldr(temp, StackOperandFrom(source));
706      __ Str(temp, StackOperandFrom(destination));
707    }
708  }
709}
710
711void CodeGeneratorARM64::Load(Primitive::Type type,
712                              vixl::CPURegister dst,
713                              const vixl::MemOperand& src) {
714  switch (type) {
715    case Primitive::kPrimBoolean:
716      __ Ldrb(Register(dst), src);
717      break;
718    case Primitive::kPrimByte:
719      __ Ldrsb(Register(dst), src);
720      break;
721    case Primitive::kPrimShort:
722      __ Ldrsh(Register(dst), src);
723      break;
724    case Primitive::kPrimChar:
725      __ Ldrh(Register(dst), src);
726      break;
727    case Primitive::kPrimInt:
728    case Primitive::kPrimNot:
729    case Primitive::kPrimLong:
730    case Primitive::kPrimFloat:
731    case Primitive::kPrimDouble:
732      DCHECK(dst.Is64Bits() == Is64BitType(type));
733      __ Ldr(dst, src);
734      break;
735    case Primitive::kPrimVoid:
736      LOG(FATAL) << "Unreachable type " << type;
737  }
738}
739
740void CodeGeneratorARM64::Store(Primitive::Type type,
741                               vixl::CPURegister rt,
742                               const vixl::MemOperand& dst) {
743  switch (type) {
744    case Primitive::kPrimBoolean:
745    case Primitive::kPrimByte:
746      __ Strb(Register(rt), dst);
747      break;
748    case Primitive::kPrimChar:
749    case Primitive::kPrimShort:
750      __ Strh(Register(rt), dst);
751      break;
752    case Primitive::kPrimInt:
753    case Primitive::kPrimNot:
754    case Primitive::kPrimLong:
755    case Primitive::kPrimFloat:
756    case Primitive::kPrimDouble:
757      DCHECK(rt.Is64Bits() == Is64BitType(type));
758      __ Str(rt, dst);
759      break;
760    case Primitive::kPrimVoid:
761      LOG(FATAL) << "Unreachable type " << type;
762  }
763}
764
765void CodeGeneratorARM64::LoadCurrentMethod(vixl::Register current_method) {
766  DCHECK(current_method.IsW());
767  __ Ldr(current_method, MemOperand(sp, kCurrentMethodStackOffset));
768}
769
770void CodeGeneratorARM64::InvokeRuntime(int32_t entry_point_offset,
771                                       HInstruction* instruction,
772                                       uint32_t dex_pc) {
773  __ Ldr(lr, MemOperand(tr, entry_point_offset));
774  __ Blr(lr);
775  RecordPcInfo(instruction, dex_pc);
776  DCHECK(instruction->IsSuspendCheck()
777      || instruction->IsBoundsCheck()
778      || instruction->IsNullCheck()
779      || instruction->IsDivZeroCheck()
780      || !IsLeafMethod());
781}
782
783void InstructionCodeGeneratorARM64::GenerateClassInitializationCheck(SlowPathCodeARM64* slow_path,
784                                                                     vixl::Register class_reg) {
785  UseScratchRegisterScope temps(GetVIXLAssembler());
786  Register temp = temps.AcquireW();
787  __ Ldr(temp, HeapOperand(class_reg, mirror::Class::StatusOffset()));
788  __ Cmp(temp, mirror::Class::kStatusInitialized);
789  __ B(lt, slow_path->GetEntryLabel());
790  // Even if the initialized flag is set, we may be in a situation where caches are not synced
791  // properly. Therefore, we do a memory fence.
792  __ Dmb(InnerShareable, BarrierAll);
793  __ Bind(slow_path->GetExitLabel());
794}
795
796InstructionCodeGeneratorARM64::InstructionCodeGeneratorARM64(HGraph* graph,
797                                                             CodeGeneratorARM64* codegen)
798      : HGraphVisitor(graph),
799        assembler_(codegen->GetAssembler()),
800        codegen_(codegen) {}
801
802#define FOR_EACH_UNIMPLEMENTED_INSTRUCTION(M)              \
803  M(ParallelMove)                                          \
804  M(Rem)
805
806#define UNIMPLEMENTED_INSTRUCTION_BREAK_CODE(name) name##UnimplementedInstructionBreakCode
807
808enum UnimplementedInstructionBreakCode {
809  // Using a base helps identify when we hit such breakpoints.
810  UnimplementedInstructionBreakCodeBaseCode = 0x900,
811#define ENUM_UNIMPLEMENTED_INSTRUCTION(name) UNIMPLEMENTED_INSTRUCTION_BREAK_CODE(name),
812  FOR_EACH_UNIMPLEMENTED_INSTRUCTION(ENUM_UNIMPLEMENTED_INSTRUCTION)
813#undef ENUM_UNIMPLEMENTED_INSTRUCTION
814};
815
816#define DEFINE_UNIMPLEMENTED_INSTRUCTION_VISITORS(name)                               \
817  void InstructionCodeGeneratorARM64::Visit##name(H##name* instr) {                   \
818    UNUSED(instr);                                                                    \
819    __ Brk(UNIMPLEMENTED_INSTRUCTION_BREAK_CODE(name));                               \
820  }                                                                                   \
821  void LocationsBuilderARM64::Visit##name(H##name* instr) {                           \
822    LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instr); \
823    locations->SetOut(Location::Any());                                               \
824  }
825  FOR_EACH_UNIMPLEMENTED_INSTRUCTION(DEFINE_UNIMPLEMENTED_INSTRUCTION_VISITORS)
826#undef DEFINE_UNIMPLEMENTED_INSTRUCTION_VISITORS
827
828#undef UNIMPLEMENTED_INSTRUCTION_BREAK_CODE
829#undef FOR_EACH_UNIMPLEMENTED_INSTRUCTION
830
831void LocationsBuilderARM64::HandleBinaryOp(HBinaryOperation* instr) {
832  DCHECK_EQ(instr->InputCount(), 2U);
833  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instr);
834  Primitive::Type type = instr->GetResultType();
835  switch (type) {
836    case Primitive::kPrimInt:
837    case Primitive::kPrimLong:
838      locations->SetInAt(0, Location::RequiresRegister());
839      locations->SetInAt(1, Location::RegisterOrConstant(instr->InputAt(1)));
840      locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
841      break;
842
843    case Primitive::kPrimFloat:
844    case Primitive::kPrimDouble:
845      locations->SetInAt(0, Location::RequiresFpuRegister());
846      locations->SetInAt(1, Location::RequiresFpuRegister());
847      locations->SetOut(Location::RequiresFpuRegister(), Location::kNoOutputOverlap);
848      break;
849
850    default:
851      LOG(FATAL) << "Unexpected " << instr->DebugName() << " type " << type;
852  }
853}
854
855void InstructionCodeGeneratorARM64::HandleBinaryOp(HBinaryOperation* instr) {
856  Primitive::Type type = instr->GetType();
857
858  switch (type) {
859    case Primitive::kPrimInt:
860    case Primitive::kPrimLong: {
861      Register dst = OutputRegister(instr);
862      Register lhs = InputRegisterAt(instr, 0);
863      Operand rhs = InputOperandAt(instr, 1);
864      if (instr->IsAdd()) {
865        __ Add(dst, lhs, rhs);
866      } else if (instr->IsAnd()) {
867        __ And(dst, lhs, rhs);
868      } else if (instr->IsOr()) {
869        __ Orr(dst, lhs, rhs);
870      } else if (instr->IsSub()) {
871        __ Sub(dst, lhs, rhs);
872      } else {
873        DCHECK(instr->IsXor());
874        __ Eor(dst, lhs, rhs);
875      }
876      break;
877    }
878    case Primitive::kPrimFloat:
879    case Primitive::kPrimDouble: {
880      FPRegister dst = OutputFPRegister(instr);
881      FPRegister lhs = InputFPRegisterAt(instr, 0);
882      FPRegister rhs = InputFPRegisterAt(instr, 1);
883      if (instr->IsAdd()) {
884        __ Fadd(dst, lhs, rhs);
885      } else if (instr->IsSub()) {
886        __ Fsub(dst, lhs, rhs);
887      } else {
888        LOG(FATAL) << "Unexpected floating-point binary operation";
889      }
890      break;
891    }
892    default:
893      LOG(FATAL) << "Unexpected binary operation type " << type;
894  }
895}
896
897void LocationsBuilderARM64::VisitAdd(HAdd* instruction) {
898  HandleBinaryOp(instruction);
899}
900
901void InstructionCodeGeneratorARM64::VisitAdd(HAdd* instruction) {
902  HandleBinaryOp(instruction);
903}
904
905void LocationsBuilderARM64::VisitAnd(HAnd* instruction) {
906  HandleBinaryOp(instruction);
907}
908
909void InstructionCodeGeneratorARM64::VisitAnd(HAnd* instruction) {
910  HandleBinaryOp(instruction);
911}
912
913void LocationsBuilderARM64::VisitArrayGet(HArrayGet* instruction) {
914  LocationSummary* locations =
915      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
916  locations->SetInAt(0, Location::RequiresRegister());
917  locations->SetInAt(1, Location::RegisterOrConstant(instruction->InputAt(1)));
918  locations->SetOut(Location::RequiresRegister());
919}
920
921void InstructionCodeGeneratorARM64::VisitArrayGet(HArrayGet* instruction) {
922  LocationSummary* locations = instruction->GetLocations();
923  Primitive::Type type = instruction->GetType();
924  Register obj = InputRegisterAt(instruction, 0);
925  Location index = locations->InAt(1);
926  size_t offset = mirror::Array::DataOffset(Primitive::ComponentSize(type)).Uint32Value();
927  MemOperand source(obj);
928  UseScratchRegisterScope temps(GetVIXLAssembler());
929
930  if (index.IsConstant()) {
931    offset += Int64ConstantFrom(index) << Primitive::ComponentSizeShift(type);
932    source = MemOperand(obj, offset);
933  } else {
934    Register temp = temps.AcquireSameSizeAs(obj);
935    Register index_reg = RegisterFrom(index, Primitive::kPrimInt);
936    __ Add(temp, obj, Operand(index_reg, LSL, Primitive::ComponentSizeShift(type)));
937    source = MemOperand(temp, offset);
938  }
939
940  codegen_->Load(type, OutputCPURegister(instruction), source);
941}
942
943void LocationsBuilderARM64::VisitArrayLength(HArrayLength* instruction) {
944  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instruction);
945  locations->SetInAt(0, Location::RequiresRegister());
946  locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
947}
948
949void InstructionCodeGeneratorARM64::VisitArrayLength(HArrayLength* instruction) {
950  __ Ldr(OutputRegister(instruction),
951         HeapOperand(InputRegisterAt(instruction, 0), mirror::Array::LengthOffset()));
952}
953
954void LocationsBuilderARM64::VisitArraySet(HArraySet* instruction) {
955  Primitive::Type value_type = instruction->GetComponentType();
956  bool is_object = value_type == Primitive::kPrimNot;
957  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(
958      instruction, is_object ? LocationSummary::kCall : LocationSummary::kNoCall);
959  if (is_object) {
960    InvokeRuntimeCallingConvention calling_convention;
961    locations->SetInAt(0, LocationFrom(calling_convention.GetRegisterAt(0)));
962    locations->SetInAt(1, LocationFrom(calling_convention.GetRegisterAt(1)));
963    locations->SetInAt(2, LocationFrom(calling_convention.GetRegisterAt(2)));
964  } else {
965    locations->SetInAt(0, Location::RequiresRegister());
966    locations->SetInAt(1, Location::RegisterOrConstant(instruction->InputAt(1)));
967    locations->SetInAt(2, Location::RequiresRegister());
968  }
969}
970
971void InstructionCodeGeneratorARM64::VisitArraySet(HArraySet* instruction) {
972  Primitive::Type value_type = instruction->GetComponentType();
973  if (value_type == Primitive::kPrimNot) {
974    codegen_->InvokeRuntime(QUICK_ENTRY_POINT(pAputObject), instruction, instruction->GetDexPc());
975
976  } else {
977    LocationSummary* locations = instruction->GetLocations();
978    Register obj = InputRegisterAt(instruction, 0);
979    CPURegister value = InputCPURegisterAt(instruction, 2);
980    Location index = locations->InAt(1);
981    size_t offset = mirror::Array::DataOffset(Primitive::ComponentSize(value_type)).Uint32Value();
982    MemOperand destination(obj);
983    UseScratchRegisterScope temps(GetVIXLAssembler());
984
985    if (index.IsConstant()) {
986      offset += Int64ConstantFrom(index) << Primitive::ComponentSizeShift(value_type);
987      destination = MemOperand(obj, offset);
988    } else {
989      Register temp = temps.AcquireSameSizeAs(obj);
990      Register index_reg = InputRegisterAt(instruction, 1);
991      __ Add(temp, obj, Operand(index_reg, LSL, Primitive::ComponentSizeShift(value_type)));
992      destination = MemOperand(temp, offset);
993    }
994
995    codegen_->Store(value_type, value, destination);
996  }
997}
998
999void LocationsBuilderARM64::VisitBoundsCheck(HBoundsCheck* instruction) {
1000  LocationSummary* locations =
1001      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
1002  locations->SetInAt(0, Location::RequiresRegister());
1003  locations->SetInAt(1, Location::RequiresRegister());
1004  if (instruction->HasUses()) {
1005    locations->SetOut(Location::SameAsFirstInput());
1006  }
1007}
1008
1009void InstructionCodeGeneratorARM64::VisitBoundsCheck(HBoundsCheck* instruction) {
1010  BoundsCheckSlowPathARM64* slow_path = new (GetGraph()->GetArena()) BoundsCheckSlowPathARM64();
1011  codegen_->AddSlowPath(slow_path);
1012
1013  __ Cmp(InputRegisterAt(instruction, 0), InputOperandAt(instruction, 1));
1014  __ B(slow_path->GetEntryLabel(), hs);
1015}
1016
1017void LocationsBuilderARM64::VisitCheckCast(HCheckCast* instruction) {
1018  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(
1019      instruction, LocationSummary::kCallOnSlowPath);
1020  locations->SetInAt(0, Location::RequiresRegister());
1021  locations->SetInAt(1, Location::RequiresRegister());
1022}
1023
1024void InstructionCodeGeneratorARM64::VisitCheckCast(HCheckCast* instruction) {
1025  UseScratchRegisterScope temps(GetVIXLAssembler());
1026  Register obj = InputRegisterAt(instruction, 0);;
1027  Register cls = InputRegisterAt(instruction, 1);;
1028  Register temp = temps.AcquireW();
1029
1030  SlowPathCodeARM64* slow_path = new (GetGraph()->GetArena()) TypeCheckSlowPathARM64();
1031  codegen_->AddSlowPath(slow_path);
1032
1033  // TODO: avoid this check if we know obj is not null.
1034  __ Cbz(obj, slow_path->GetExitLabel());
1035  // Compare the class of `obj` with `cls`.
1036  __ Ldr(temp, HeapOperand(obj, mirror::Object::ClassOffset()));
1037  __ Cmp(temp, cls);
1038  __ B(ne, slow_path->GetEntryLabel());
1039  __ Bind(slow_path->GetExitLabel());
1040}
1041
1042void LocationsBuilderARM64::VisitClinitCheck(HClinitCheck* check) {
1043  LocationSummary* locations =
1044      new (GetGraph()->GetArena()) LocationSummary(check, LocationSummary::kCallOnSlowPath);
1045  locations->SetInAt(0, Location::RequiresRegister());
1046  if (check->HasUses()) {
1047    locations->SetOut(Location::SameAsFirstInput());
1048  }
1049}
1050
1051void InstructionCodeGeneratorARM64::VisitClinitCheck(HClinitCheck* check) {
1052  // We assume the class is not null.
1053  SlowPathCodeARM64* slow_path = new (GetGraph()->GetArena()) LoadClassSlowPathARM64(
1054      check->GetLoadClass(), check, check->GetDexPc(), true);
1055  codegen_->AddSlowPath(slow_path);
1056  GenerateClassInitializationCheck(slow_path, InputRegisterAt(check, 0));
1057}
1058
1059void LocationsBuilderARM64::VisitCompare(HCompare* instruction) {
1060  LocationSummary* locations =
1061      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
1062  locations->SetInAt(0, Location::RequiresRegister());
1063  locations->SetInAt(1, Location::RegisterOrConstant(instruction->InputAt(1)));
1064  locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1065}
1066
1067void InstructionCodeGeneratorARM64::VisitCompare(HCompare* instruction) {
1068  Primitive::Type in_type = instruction->InputAt(0)->GetType();
1069
1070  DCHECK_EQ(in_type, Primitive::kPrimLong);
1071  switch (in_type) {
1072    case Primitive::kPrimLong: {
1073      vixl::Label done;
1074      Register result = OutputRegister(instruction);
1075      Register left = InputRegisterAt(instruction, 0);
1076      Operand right = InputOperandAt(instruction, 1);
1077      __ Subs(result.X(), left, right);
1078      __ B(eq, &done);
1079      __ Mov(result, 1);
1080      __ Cneg(result, result, le);
1081      __ Bind(&done);
1082      break;
1083    }
1084    default:
1085      LOG(FATAL) << "Unimplemented compare type " << in_type;
1086  }
1087}
1088
1089void LocationsBuilderARM64::VisitCondition(HCondition* instruction) {
1090  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instruction);
1091  locations->SetInAt(0, Location::RequiresRegister());
1092  locations->SetInAt(1, Location::RegisterOrConstant(instruction->InputAt(1)));
1093  if (instruction->NeedsMaterialization()) {
1094    locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1095  }
1096}
1097
1098void InstructionCodeGeneratorARM64::VisitCondition(HCondition* instruction) {
1099  if (!instruction->NeedsMaterialization()) {
1100    return;
1101  }
1102
1103  LocationSummary* locations = instruction->GetLocations();
1104  Register lhs = InputRegisterAt(instruction, 0);
1105  Operand rhs = InputOperandAt(instruction, 1);
1106  Register res = RegisterFrom(locations->Out(), instruction->GetType());
1107  Condition cond = ARM64Condition(instruction->GetCondition());
1108
1109  __ Cmp(lhs, rhs);
1110  __ Csel(res, vixl::Assembler::AppropriateZeroRegFor(res), Operand(1), InvertCondition(cond));
1111}
1112
1113#define FOR_EACH_CONDITION_INSTRUCTION(M)                                                \
1114  M(Equal)                                                                               \
1115  M(NotEqual)                                                                            \
1116  M(LessThan)                                                                            \
1117  M(LessThanOrEqual)                                                                     \
1118  M(GreaterThan)                                                                         \
1119  M(GreaterThanOrEqual)
1120#define DEFINE_CONDITION_VISITORS(Name)                                                  \
1121void LocationsBuilderARM64::Visit##Name(H##Name* comp) { VisitCondition(comp); }         \
1122void InstructionCodeGeneratorARM64::Visit##Name(H##Name* comp) { VisitCondition(comp); }
1123FOR_EACH_CONDITION_INSTRUCTION(DEFINE_CONDITION_VISITORS)
1124#undef DEFINE_CONDITION_VISITORS
1125#undef FOR_EACH_CONDITION_INSTRUCTION
1126
1127void LocationsBuilderARM64::VisitDiv(HDiv* div) {
1128  LocationSummary* locations =
1129      new (GetGraph()->GetArena()) LocationSummary(div, LocationSummary::kNoCall);
1130  switch (div->GetResultType()) {
1131    case Primitive::kPrimInt:
1132    case Primitive::kPrimLong:
1133      locations->SetInAt(0, Location::RequiresRegister());
1134      locations->SetInAt(1, Location::RequiresRegister());
1135      locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1136      break;
1137
1138    case Primitive::kPrimFloat:
1139    case Primitive::kPrimDouble:
1140      locations->SetInAt(0, Location::RequiresFpuRegister());
1141      locations->SetInAt(1, Location::RequiresFpuRegister());
1142      locations->SetOut(Location::RequiresFpuRegister(), Location::kNoOutputOverlap);
1143      break;
1144
1145    default:
1146      LOG(FATAL) << "Unexpected div type " << div->GetResultType();
1147  }
1148}
1149
1150void InstructionCodeGeneratorARM64::VisitDiv(HDiv* div) {
1151  Primitive::Type type = div->GetResultType();
1152  switch (type) {
1153    case Primitive::kPrimInt:
1154    case Primitive::kPrimLong:
1155      __ Sdiv(OutputRegister(div), InputRegisterAt(div, 0), InputRegisterAt(div, 1));
1156      break;
1157
1158    case Primitive::kPrimFloat:
1159    case Primitive::kPrimDouble:
1160      __ Fdiv(OutputFPRegister(div), InputFPRegisterAt(div, 0), InputFPRegisterAt(div, 1));
1161      break;
1162
1163    default:
1164      LOG(FATAL) << "Unexpected div type " << type;
1165  }
1166}
1167
1168void LocationsBuilderARM64::VisitDivZeroCheck(HDivZeroCheck* instruction) {
1169  LocationSummary* locations =
1170      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
1171  locations->SetInAt(0, Location::RegisterOrConstant(instruction->InputAt(0)));
1172  if (instruction->HasUses()) {
1173    locations->SetOut(Location::SameAsFirstInput());
1174  }
1175}
1176
1177void InstructionCodeGeneratorARM64::VisitDivZeroCheck(HDivZeroCheck* instruction) {
1178  SlowPathCodeARM64* slow_path =
1179      new (GetGraph()->GetArena()) DivZeroCheckSlowPathARM64(instruction);
1180  codegen_->AddSlowPath(slow_path);
1181  Location value = instruction->GetLocations()->InAt(0);
1182
1183  if (value.IsConstant()) {
1184    int64_t divisor = Int64ConstantFrom(value);
1185    if (divisor == 0) {
1186      __ B(slow_path->GetEntryLabel());
1187    } else {
1188      LOG(FATAL) << "Divisions by non-null constants should have been optimized away.";
1189    }
1190  } else {
1191    __ Cbz(InputRegisterAt(instruction, 0), slow_path->GetEntryLabel());
1192  }
1193}
1194
1195void LocationsBuilderARM64::VisitDoubleConstant(HDoubleConstant* constant) {
1196  LocationSummary* locations =
1197      new (GetGraph()->GetArena()) LocationSummary(constant, LocationSummary::kNoCall);
1198  locations->SetOut(Location::ConstantLocation(constant));
1199}
1200
1201void InstructionCodeGeneratorARM64::VisitDoubleConstant(HDoubleConstant* constant) {
1202  UNUSED(constant);
1203  // Will be generated at use site.
1204}
1205
1206void LocationsBuilderARM64::VisitExit(HExit* exit) {
1207  exit->SetLocations(nullptr);
1208}
1209
1210void InstructionCodeGeneratorARM64::VisitExit(HExit* exit) {
1211  UNUSED(exit);
1212  if (kIsDebugBuild) {
1213    down_cast<Arm64Assembler*>(GetAssembler())->Comment("Unreachable");
1214    __ Brk(__LINE__);    // TODO: Introduce special markers for such code locations.
1215  }
1216}
1217
1218void LocationsBuilderARM64::VisitFloatConstant(HFloatConstant* constant) {
1219  LocationSummary* locations =
1220      new (GetGraph()->GetArena()) LocationSummary(constant, LocationSummary::kNoCall);
1221  locations->SetOut(Location::ConstantLocation(constant));
1222}
1223
1224void InstructionCodeGeneratorARM64::VisitFloatConstant(HFloatConstant* constant) {
1225  UNUSED(constant);
1226  // Will be generated at use site.
1227}
1228
1229void LocationsBuilderARM64::VisitGoto(HGoto* got) {
1230  got->SetLocations(nullptr);
1231}
1232
1233void InstructionCodeGeneratorARM64::VisitGoto(HGoto* got) {
1234  HBasicBlock* successor = got->GetSuccessor();
1235  // TODO: Support for suspend checks emission.
1236  if (!codegen_->GoesToNextBlock(got->GetBlock(), successor)) {
1237    __ B(codegen_->GetLabelOf(successor));
1238  }
1239}
1240
1241void LocationsBuilderARM64::VisitIf(HIf* if_instr) {
1242  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(if_instr);
1243  HInstruction* cond = if_instr->InputAt(0);
1244  DCHECK(cond->IsCondition());
1245  if (cond->AsCondition()->NeedsMaterialization()) {
1246    locations->SetInAt(0, Location::RequiresRegister());
1247  }
1248}
1249
1250void InstructionCodeGeneratorARM64::VisitIf(HIf* if_instr) {
1251  HInstruction* cond = if_instr->InputAt(0);
1252  DCHECK(cond->IsCondition());
1253  HCondition* condition = cond->AsCondition();
1254  vixl::Label* true_target = codegen_->GetLabelOf(if_instr->IfTrueSuccessor());
1255  vixl::Label* false_target = codegen_->GetLabelOf(if_instr->IfFalseSuccessor());
1256
1257  // TODO: Support constant condition input in VisitIf.
1258
1259  if (condition->NeedsMaterialization()) {
1260    // The condition instruction has been materialized, compare the output to 0.
1261    Location cond_val = if_instr->GetLocations()->InAt(0);
1262    DCHECK(cond_val.IsRegister());
1263    __ Cbnz(InputRegisterAt(if_instr, 0), true_target);
1264
1265  } else {
1266    // The condition instruction has not been materialized, use its inputs as
1267    // the comparison and its condition as the branch condition.
1268    Register lhs = InputRegisterAt(condition, 0);
1269    Operand rhs = InputOperandAt(condition, 1);
1270    Condition arm64_cond = ARM64Condition(condition->GetCondition());
1271    if ((arm64_cond == eq || arm64_cond == ne) && rhs.IsImmediate() && (rhs.immediate() == 0)) {
1272      if (arm64_cond == eq) {
1273        __ Cbz(lhs, true_target);
1274      } else {
1275        __ Cbnz(lhs, true_target);
1276      }
1277    } else {
1278      __ Cmp(lhs, rhs);
1279      __ B(arm64_cond, true_target);
1280    }
1281  }
1282
1283  if (!codegen_->GoesToNextBlock(if_instr->GetBlock(), if_instr->IfFalseSuccessor())) {
1284    __ B(false_target);
1285  }
1286}
1287
1288void LocationsBuilderARM64::VisitInstanceFieldGet(HInstanceFieldGet* instruction) {
1289  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instruction);
1290  locations->SetInAt(0, Location::RequiresRegister());
1291  locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1292}
1293
1294void InstructionCodeGeneratorARM64::VisitInstanceFieldGet(HInstanceFieldGet* instruction) {
1295  MemOperand field = MemOperand(InputRegisterAt(instruction, 0),
1296                                instruction->GetFieldOffset().Uint32Value());
1297  codegen_->Load(instruction->GetType(), OutputCPURegister(instruction), field);
1298}
1299
1300void LocationsBuilderARM64::VisitInstanceFieldSet(HInstanceFieldSet* instruction) {
1301  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instruction);
1302  locations->SetInAt(0, Location::RequiresRegister());
1303  locations->SetInAt(1, Location::RequiresRegister());
1304}
1305
1306void InstructionCodeGeneratorARM64::VisitInstanceFieldSet(HInstanceFieldSet* instruction) {
1307  Primitive::Type field_type = instruction->GetFieldType();
1308  CPURegister value = InputCPURegisterAt(instruction, 1);
1309  Register obj = InputRegisterAt(instruction, 0);
1310  codegen_->Store(field_type, value, MemOperand(obj, instruction->GetFieldOffset().Uint32Value()));
1311  if (field_type == Primitive::kPrimNot) {
1312    codegen_->MarkGCCard(obj, Register(value));
1313  }
1314}
1315
1316void LocationsBuilderARM64::VisitInstanceOf(HInstanceOf* instruction) {
1317  LocationSummary::CallKind call_kind =
1318      instruction->IsClassFinal() ? LocationSummary::kNoCall : LocationSummary::kCallOnSlowPath;
1319  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instruction, call_kind);
1320  locations->SetInAt(0, Location::RequiresRegister());
1321  locations->SetInAt(1, Location::RequiresRegister());
1322  locations->SetOut(Location::RequiresRegister(), true);  // The output does overlap inputs.
1323}
1324
1325void InstructionCodeGeneratorARM64::VisitInstanceOf(HInstanceOf* instruction) {
1326  LocationSummary* locations = instruction->GetLocations();
1327  Register obj = InputRegisterAt(instruction, 0);;
1328  Register cls = InputRegisterAt(instruction, 1);;
1329  Register out = OutputRegister(instruction);
1330
1331  vixl::Label done;
1332
1333  // Return 0 if `obj` is null.
1334  // TODO: Avoid this check if we know `obj` is not null.
1335  __ Mov(out, 0);
1336  __ Cbz(obj, &done);
1337
1338  // Compare the class of `obj` with `cls`.
1339  __ Ldr(out, MemOperand(obj, mirror::Object::ClassOffset().Int32Value()));
1340  __ Cmp(out, cls);
1341  if (instruction->IsClassFinal()) {
1342    // Classes must be equal for the instanceof to succeed.
1343    __ Cset(out, eq);
1344  } else {
1345    // If the classes are not equal, we go into a slow path.
1346    DCHECK(locations->OnlyCallsOnSlowPath());
1347    SlowPathCodeARM64* slow_path =
1348        new (GetGraph()->GetArena()) TypeCheckSlowPathARM64();
1349    codegen_->AddSlowPath(slow_path);
1350    __ B(ne, slow_path->GetEntryLabel());
1351    __ Mov(out, 1);
1352    __ Bind(slow_path->GetExitLabel());
1353  }
1354
1355  __ Bind(&done);
1356}
1357
1358void LocationsBuilderARM64::VisitIntConstant(HIntConstant* constant) {
1359  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(constant);
1360  locations->SetOut(Location::ConstantLocation(constant));
1361}
1362
1363void InstructionCodeGeneratorARM64::VisitIntConstant(HIntConstant* constant) {
1364  // Will be generated at use site.
1365  UNUSED(constant);
1366}
1367
1368void LocationsBuilderARM64::HandleInvoke(HInvoke* invoke) {
1369  LocationSummary* locations =
1370      new (GetGraph()->GetArena()) LocationSummary(invoke, LocationSummary::kCall);
1371  locations->AddTemp(LocationFrom(x0));
1372
1373  InvokeDexCallingConventionVisitor calling_convention_visitor;
1374  for (size_t i = 0; i < invoke->InputCount(); i++) {
1375    HInstruction* input = invoke->InputAt(i);
1376    locations->SetInAt(i, calling_convention_visitor.GetNextLocation(input->GetType()));
1377  }
1378
1379  Primitive::Type return_type = invoke->GetType();
1380  if (return_type != Primitive::kPrimVoid) {
1381    locations->SetOut(calling_convention_visitor.GetReturnLocation(return_type));
1382  }
1383}
1384
1385void LocationsBuilderARM64::VisitInvokeInterface(HInvokeInterface* invoke) {
1386  HandleInvoke(invoke);
1387}
1388
1389void InstructionCodeGeneratorARM64::VisitInvokeInterface(HInvokeInterface* invoke) {
1390  // TODO: b/18116999, our IMTs can miss an IncompatibleClassChangeError.
1391  Register temp = WRegisterFrom(invoke->GetLocations()->GetTemp(0));
1392  uint32_t method_offset = mirror::Class::EmbeddedImTableOffset().Uint32Value() +
1393          (invoke->GetImtIndex() % mirror::Class::kImtSize) * sizeof(mirror::Class::ImTableEntry);
1394  Location receiver = invoke->GetLocations()->InAt(0);
1395  Offset class_offset = mirror::Object::ClassOffset();
1396  Offset entry_point = mirror::ArtMethod::EntryPointFromQuickCompiledCodeOffset(kArm64PointerSize);
1397
1398  // The register ip1 is required to be used for the hidden argument in
1399  // art_quick_imt_conflict_trampoline, so prevent VIXL from using it.
1400  UseScratchRegisterScope scratch_scope(GetVIXLAssembler());
1401  scratch_scope.Exclude(ip1);
1402  __ Mov(ip1, invoke->GetDexMethodIndex());
1403
1404  // temp = object->GetClass();
1405  if (receiver.IsStackSlot()) {
1406    __ Ldr(temp, StackOperandFrom(receiver));
1407    __ Ldr(temp, HeapOperand(temp, class_offset));
1408  } else {
1409    __ Ldr(temp, HeapOperandFrom(receiver, class_offset));
1410  }
1411  // temp = temp->GetImtEntryAt(method_offset);
1412  __ Ldr(temp, HeapOperand(temp, method_offset));
1413  // lr = temp->GetEntryPoint();
1414  __ Ldr(lr, HeapOperand(temp, entry_point));
1415  // lr();
1416  __ Blr(lr);
1417  DCHECK(!codegen_->IsLeafMethod());
1418  codegen_->RecordPcInfo(invoke, invoke->GetDexPc());
1419}
1420
1421void LocationsBuilderARM64::VisitInvokeVirtual(HInvokeVirtual* invoke) {
1422  HandleInvoke(invoke);
1423}
1424
1425void LocationsBuilderARM64::VisitInvokeStatic(HInvokeStatic* invoke) {
1426  HandleInvoke(invoke);
1427}
1428
1429void InstructionCodeGeneratorARM64::VisitInvokeStatic(HInvokeStatic* invoke) {
1430  Register temp = WRegisterFrom(invoke->GetLocations()->GetTemp(0));
1431  // Make sure that ArtMethod* is passed in W0 as per the calling convention
1432  DCHECK(temp.Is(w0));
1433  size_t index_in_cache = mirror::Array::DataOffset(kHeapRefSize).SizeValue() +
1434    invoke->GetIndexInDexCache() * kHeapRefSize;
1435
1436  // TODO: Implement all kinds of calls:
1437  // 1) boot -> boot
1438  // 2) app -> boot
1439  // 3) app -> app
1440  //
1441  // Currently we implement the app -> app logic, which looks up in the resolve cache.
1442
1443  // temp = method;
1444  codegen_->LoadCurrentMethod(temp);
1445  // temp = temp->dex_cache_resolved_methods_;
1446  __ Ldr(temp, MemOperand(temp.X(),
1447                          mirror::ArtMethod::DexCacheResolvedMethodsOffset().SizeValue()));
1448  // temp = temp[index_in_cache];
1449  __ Ldr(temp, MemOperand(temp.X(), index_in_cache));
1450  // lr = temp->entry_point_from_quick_compiled_code_;
1451  __ Ldr(lr, MemOperand(temp.X(),
1452                        mirror::ArtMethod::EntryPointFromQuickCompiledCodeOffset(
1453                            kArm64PointerSize).SizeValue()));
1454  // lr();
1455  __ Blr(lr);
1456
1457  codegen_->RecordPcInfo(invoke, invoke->GetDexPc());
1458  DCHECK(!codegen_->IsLeafMethod());
1459}
1460
1461void InstructionCodeGeneratorARM64::VisitInvokeVirtual(HInvokeVirtual* invoke) {
1462  LocationSummary* locations = invoke->GetLocations();
1463  Location receiver = locations->InAt(0);
1464  Register temp = XRegisterFrom(invoke->GetLocations()->GetTemp(0));
1465  size_t method_offset = mirror::Class::EmbeddedVTableOffset().SizeValue() +
1466    invoke->GetVTableIndex() * sizeof(mirror::Class::VTableEntry);
1467  Offset class_offset = mirror::Object::ClassOffset();
1468  Offset entry_point = mirror::ArtMethod::EntryPointFromQuickCompiledCodeOffset(kArm64PointerSize);
1469
1470  // temp = object->GetClass();
1471  if (receiver.IsStackSlot()) {
1472    __ Ldr(temp.W(), MemOperand(sp, receiver.GetStackIndex()));
1473    __ Ldr(temp.W(), MemOperand(temp, class_offset.SizeValue()));
1474  } else {
1475    DCHECK(receiver.IsRegister());
1476    __ Ldr(temp.W(), HeapOperandFrom(receiver, class_offset));
1477  }
1478  // temp = temp->GetMethodAt(method_offset);
1479  __ Ldr(temp.W(), MemOperand(temp, method_offset));
1480  // lr = temp->GetEntryPoint();
1481  __ Ldr(lr, MemOperand(temp, entry_point.SizeValue()));
1482  // lr();
1483  __ Blr(lr);
1484  DCHECK(!codegen_->IsLeafMethod());
1485  codegen_->RecordPcInfo(invoke, invoke->GetDexPc());
1486}
1487
1488void LocationsBuilderARM64::VisitLoadClass(HLoadClass* cls) {
1489  LocationSummary::CallKind call_kind = cls->CanCallRuntime() ? LocationSummary::kCallOnSlowPath
1490                                                              : LocationSummary::kNoCall;
1491  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(cls, call_kind);
1492  locations->SetOut(Location::RequiresRegister());
1493}
1494
1495void InstructionCodeGeneratorARM64::VisitLoadClass(HLoadClass* cls) {
1496  Register out = OutputRegister(cls);
1497  if (cls->IsReferrersClass()) {
1498    DCHECK(!cls->CanCallRuntime());
1499    DCHECK(!cls->MustGenerateClinitCheck());
1500    codegen_->LoadCurrentMethod(out);
1501    __ Ldr(out, HeapOperand(out, mirror::ArtMethod::DeclaringClassOffset()));
1502  } else {
1503    DCHECK(cls->CanCallRuntime());
1504    codegen_->LoadCurrentMethod(out);
1505    __ Ldr(out, HeapOperand(out, mirror::ArtMethod::DexCacheResolvedTypesOffset()));
1506    __ Ldr(out, MemOperand(out.X(), CodeGenerator::GetCacheOffset(cls->GetTypeIndex())));
1507
1508    SlowPathCodeARM64* slow_path = new (GetGraph()->GetArena()) LoadClassSlowPathARM64(
1509        cls, cls, cls->GetDexPc(), cls->MustGenerateClinitCheck());
1510    codegen_->AddSlowPath(slow_path);
1511    __ Cbz(out, slow_path->GetEntryLabel());
1512    if (cls->MustGenerateClinitCheck()) {
1513      GenerateClassInitializationCheck(slow_path, out);
1514    } else {
1515      __ Bind(slow_path->GetExitLabel());
1516    }
1517  }
1518}
1519
1520void LocationsBuilderARM64::VisitLoadException(HLoadException* load) {
1521  LocationSummary* locations =
1522      new (GetGraph()->GetArena()) LocationSummary(load, LocationSummary::kNoCall);
1523  locations->SetOut(Location::RequiresRegister());
1524}
1525
1526void InstructionCodeGeneratorARM64::VisitLoadException(HLoadException* instruction) {
1527  MemOperand exception = MemOperand(tr, Thread::ExceptionOffset<kArm64WordSize>().Int32Value());
1528  __ Ldr(OutputRegister(instruction), exception);
1529  __ Str(wzr, exception);
1530}
1531
1532void LocationsBuilderARM64::VisitLoadLocal(HLoadLocal* load) {
1533  load->SetLocations(nullptr);
1534}
1535
1536void InstructionCodeGeneratorARM64::VisitLoadLocal(HLoadLocal* load) {
1537  // Nothing to do, this is driven by the code generator.
1538  UNUSED(load);
1539}
1540
1541void LocationsBuilderARM64::VisitLoadString(HLoadString* load) {
1542  LocationSummary* locations =
1543      new (GetGraph()->GetArena()) LocationSummary(load, LocationSummary::kCallOnSlowPath);
1544  locations->SetOut(Location::RequiresRegister());
1545}
1546
1547void InstructionCodeGeneratorARM64::VisitLoadString(HLoadString* load) {
1548  SlowPathCodeARM64* slow_path = new (GetGraph()->GetArena()) LoadStringSlowPathARM64(load);
1549  codegen_->AddSlowPath(slow_path);
1550
1551  Register out = OutputRegister(load);
1552  codegen_->LoadCurrentMethod(out);
1553  __ Ldr(out, HeapOperand(out, mirror::ArtMethod::DexCacheStringsOffset()));
1554  __ Ldr(out, MemOperand(out.X(), CodeGenerator::GetCacheOffset(load->GetStringIndex())));
1555  __ Cbz(out, slow_path->GetEntryLabel());
1556  __ Bind(slow_path->GetExitLabel());
1557}
1558
1559void LocationsBuilderARM64::VisitLocal(HLocal* local) {
1560  local->SetLocations(nullptr);
1561}
1562
1563void InstructionCodeGeneratorARM64::VisitLocal(HLocal* local) {
1564  DCHECK_EQ(local->GetBlock(), GetGraph()->GetEntryBlock());
1565}
1566
1567void LocationsBuilderARM64::VisitLongConstant(HLongConstant* constant) {
1568  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(constant);
1569  locations->SetOut(Location::ConstantLocation(constant));
1570}
1571
1572void InstructionCodeGeneratorARM64::VisitLongConstant(HLongConstant* constant) {
1573  // Will be generated at use site.
1574  UNUSED(constant);
1575}
1576
1577void LocationsBuilderARM64::VisitMonitorOperation(HMonitorOperation* instruction) {
1578  LocationSummary* locations =
1579      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kCall);
1580  InvokeRuntimeCallingConvention calling_convention;
1581  locations->SetInAt(0, LocationFrom(calling_convention.GetRegisterAt(0)));
1582}
1583
1584void InstructionCodeGeneratorARM64::VisitMonitorOperation(HMonitorOperation* instruction) {
1585  codegen_->InvokeRuntime(instruction->IsEnter()
1586        ? QUICK_ENTRY_POINT(pLockObject) : QUICK_ENTRY_POINT(pUnlockObject),
1587      instruction,
1588      instruction->GetDexPc());
1589}
1590
1591void LocationsBuilderARM64::VisitMul(HMul* mul) {
1592  LocationSummary* locations =
1593      new (GetGraph()->GetArena()) LocationSummary(mul, LocationSummary::kNoCall);
1594  switch (mul->GetResultType()) {
1595    case Primitive::kPrimInt:
1596    case Primitive::kPrimLong:
1597      locations->SetInAt(0, Location::RequiresRegister());
1598      locations->SetInAt(1, Location::RequiresRegister());
1599      locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1600      break;
1601
1602    case Primitive::kPrimFloat:
1603    case Primitive::kPrimDouble:
1604      locations->SetInAt(0, Location::RequiresFpuRegister());
1605      locations->SetInAt(1, Location::RequiresFpuRegister());
1606      locations->SetOut(Location::RequiresFpuRegister(), Location::kNoOutputOverlap);
1607      break;
1608
1609    default:
1610      LOG(FATAL) << "Unexpected mul type " << mul->GetResultType();
1611  }
1612}
1613
1614void InstructionCodeGeneratorARM64::VisitMul(HMul* mul) {
1615  switch (mul->GetResultType()) {
1616    case Primitive::kPrimInt:
1617    case Primitive::kPrimLong:
1618      __ Mul(OutputRegister(mul), InputRegisterAt(mul, 0), InputRegisterAt(mul, 1));
1619      break;
1620
1621    case Primitive::kPrimFloat:
1622    case Primitive::kPrimDouble:
1623      __ Fmul(OutputFPRegister(mul), InputFPRegisterAt(mul, 0), InputFPRegisterAt(mul, 1));
1624      break;
1625
1626    default:
1627      LOG(FATAL) << "Unexpected mul type " << mul->GetResultType();
1628  }
1629}
1630
1631void LocationsBuilderARM64::VisitNeg(HNeg* neg) {
1632  LocationSummary* locations =
1633      new (GetGraph()->GetArena()) LocationSummary(neg, LocationSummary::kNoCall);
1634  switch (neg->GetResultType()) {
1635    case Primitive::kPrimInt:
1636    case Primitive::kPrimLong:
1637      locations->SetInAt(0, Location::RegisterOrConstant(neg->InputAt(0)));
1638      locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1639      break;
1640
1641    case Primitive::kPrimFloat:
1642    case Primitive::kPrimDouble:
1643      locations->SetInAt(0, Location::RequiresFpuRegister());
1644      locations->SetOut(Location::RequiresFpuRegister(), Location::kNoOutputOverlap);
1645      break;
1646
1647    default:
1648      LOG(FATAL) << "Unexpected neg type " << neg->GetResultType();
1649  }
1650}
1651
1652void InstructionCodeGeneratorARM64::VisitNeg(HNeg* neg) {
1653  switch (neg->GetResultType()) {
1654    case Primitive::kPrimInt:
1655    case Primitive::kPrimLong:
1656      __ Neg(OutputRegister(neg), InputOperandAt(neg, 0));
1657      break;
1658
1659    case Primitive::kPrimFloat:
1660    case Primitive::kPrimDouble:
1661      __ Fneg(OutputFPRegister(neg), InputFPRegisterAt(neg, 0));
1662      break;
1663
1664    default:
1665      LOG(FATAL) << "Unexpected neg type " << neg->GetResultType();
1666  }
1667}
1668
1669void LocationsBuilderARM64::VisitNewArray(HNewArray* instruction) {
1670  LocationSummary* locations =
1671      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kCall);
1672  InvokeRuntimeCallingConvention calling_convention;
1673  locations->AddTemp(LocationFrom(calling_convention.GetRegisterAt(0)));
1674  locations->AddTemp(LocationFrom(calling_convention.GetRegisterAt(1)));
1675  locations->SetOut(LocationFrom(x0));
1676  locations->SetInAt(0, LocationFrom(calling_convention.GetRegisterAt(2)));
1677}
1678
1679void InstructionCodeGeneratorARM64::VisitNewArray(HNewArray* instruction) {
1680  LocationSummary* locations = instruction->GetLocations();
1681  InvokeRuntimeCallingConvention calling_convention;
1682  Register type_index = RegisterFrom(locations->GetTemp(0), Primitive::kPrimInt);
1683  DCHECK(type_index.Is(w0));
1684  Register current_method = RegisterFrom(locations->GetTemp(1), Primitive::kPrimNot);
1685  DCHECK(current_method.Is(w1));
1686  codegen_->LoadCurrentMethod(current_method);
1687  __ Mov(type_index, instruction->GetTypeIndex());
1688  codegen_->InvokeRuntime(
1689      QUICK_ENTRY_POINT(pAllocArrayWithAccessCheck), instruction, instruction->GetDexPc());
1690}
1691
1692void LocationsBuilderARM64::VisitNewInstance(HNewInstance* instruction) {
1693  LocationSummary* locations =
1694      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kCall);
1695  InvokeRuntimeCallingConvention calling_convention;
1696  locations->AddTemp(LocationFrom(calling_convention.GetRegisterAt(0)));
1697  locations->AddTemp(LocationFrom(calling_convention.GetRegisterAt(1)));
1698  locations->SetOut(calling_convention.GetReturnLocation(Primitive::kPrimNot));
1699}
1700
1701void InstructionCodeGeneratorARM64::VisitNewInstance(HNewInstance* instruction) {
1702  LocationSummary* locations = instruction->GetLocations();
1703  Register type_index = RegisterFrom(locations->GetTemp(0), Primitive::kPrimInt);
1704  DCHECK(type_index.Is(w0));
1705  Register current_method = RegisterFrom(locations->GetTemp(1), Primitive::kPrimNot);
1706  DCHECK(current_method.Is(w1));
1707  codegen_->LoadCurrentMethod(current_method);
1708  __ Mov(type_index, instruction->GetTypeIndex());
1709  codegen_->InvokeRuntime(
1710      QUICK_ENTRY_POINT(pAllocObjectWithAccessCheck), instruction, instruction->GetDexPc());
1711}
1712
1713void LocationsBuilderARM64::VisitNot(HNot* instruction) {
1714  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instruction);
1715  locations->SetInAt(0, Location::RequiresRegister());
1716  locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1717}
1718
1719void InstructionCodeGeneratorARM64::VisitNot(HNot* instruction) {
1720  switch (instruction->InputAt(0)->GetType()) {
1721    case Primitive::kPrimBoolean:
1722      __ Eor(OutputRegister(instruction), InputRegisterAt(instruction, 0), Operand(1));
1723      break;
1724
1725    case Primitive::kPrimInt:
1726    case Primitive::kPrimLong:
1727      __ Mvn(OutputRegister(instruction), InputOperandAt(instruction, 0));
1728      break;
1729
1730    default:
1731      LOG(FATAL) << "Unexpected type for not operation " << instruction->GetResultType();
1732  }
1733}
1734
1735void LocationsBuilderARM64::VisitNullCheck(HNullCheck* instruction) {
1736  LocationSummary* locations =
1737      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
1738  locations->SetInAt(0, Location::RequiresRegister());
1739  if (instruction->HasUses()) {
1740    locations->SetOut(Location::SameAsFirstInput());
1741  }
1742}
1743
1744void InstructionCodeGeneratorARM64::VisitNullCheck(HNullCheck* instruction) {
1745  SlowPathCodeARM64* slow_path = new (GetGraph()->GetArena()) NullCheckSlowPathARM64(instruction);
1746  codegen_->AddSlowPath(slow_path);
1747
1748  LocationSummary* locations = instruction->GetLocations();
1749  Location obj = locations->InAt(0);
1750  if (obj.IsRegister()) {
1751    __ Cbz(RegisterFrom(obj, instruction->InputAt(0)->GetType()), slow_path->GetEntryLabel());
1752  } else {
1753    DCHECK(obj.IsConstant()) << obj;
1754    DCHECK_EQ(obj.GetConstant()->AsIntConstant()->GetValue(), 0);
1755    __ B(slow_path->GetEntryLabel());
1756  }
1757}
1758
1759void LocationsBuilderARM64::VisitOr(HOr* instruction) {
1760  HandleBinaryOp(instruction);
1761}
1762
1763void InstructionCodeGeneratorARM64::VisitOr(HOr* instruction) {
1764  HandleBinaryOp(instruction);
1765}
1766
1767void LocationsBuilderARM64::VisitParameterValue(HParameterValue* instruction) {
1768  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instruction);
1769  Location location = parameter_visitor_.GetNextLocation(instruction->GetType());
1770  if (location.IsStackSlot()) {
1771    location = Location::StackSlot(location.GetStackIndex() + codegen_->GetFrameSize());
1772  } else if (location.IsDoubleStackSlot()) {
1773    location = Location::DoubleStackSlot(location.GetStackIndex() + codegen_->GetFrameSize());
1774  }
1775  locations->SetOut(location);
1776}
1777
1778void InstructionCodeGeneratorARM64::VisitParameterValue(HParameterValue* instruction) {
1779  // Nothing to do, the parameter is already at its location.
1780  UNUSED(instruction);
1781}
1782
1783void LocationsBuilderARM64::VisitPhi(HPhi* instruction) {
1784  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instruction);
1785  for (size_t i = 0, e = instruction->InputCount(); i < e; ++i) {
1786    locations->SetInAt(i, Location::Any());
1787  }
1788  locations->SetOut(Location::Any());
1789}
1790
1791void InstructionCodeGeneratorARM64::VisitPhi(HPhi* instruction) {
1792  UNUSED(instruction);
1793  LOG(FATAL) << "Unreachable";
1794}
1795
1796void LocationsBuilderARM64::VisitReturn(HReturn* instruction) {
1797  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instruction);
1798  Primitive::Type return_type = instruction->InputAt(0)->GetType();
1799  locations->SetInAt(0, ARM64ReturnLocation(return_type));
1800}
1801
1802void InstructionCodeGeneratorARM64::VisitReturn(HReturn* instruction) {
1803  UNUSED(instruction);
1804  codegen_->GenerateFrameExit();
1805  __ Br(lr);
1806}
1807
1808void LocationsBuilderARM64::VisitReturnVoid(HReturnVoid* instruction) {
1809  instruction->SetLocations(nullptr);
1810}
1811
1812void InstructionCodeGeneratorARM64::VisitReturnVoid(HReturnVoid* instruction) {
1813  UNUSED(instruction);
1814  codegen_->GenerateFrameExit();
1815  __ Br(lr);
1816}
1817
1818void LocationsBuilderARM64::VisitStoreLocal(HStoreLocal* store) {
1819  LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(store);
1820  Primitive::Type field_type = store->InputAt(1)->GetType();
1821  switch (field_type) {
1822    case Primitive::kPrimNot:
1823    case Primitive::kPrimBoolean:
1824    case Primitive::kPrimByte:
1825    case Primitive::kPrimChar:
1826    case Primitive::kPrimShort:
1827    case Primitive::kPrimInt:
1828    case Primitive::kPrimFloat:
1829      locations->SetInAt(1, Location::StackSlot(codegen_->GetStackSlot(store->GetLocal())));
1830      break;
1831
1832    case Primitive::kPrimLong:
1833    case Primitive::kPrimDouble:
1834      locations->SetInAt(1, Location::DoubleStackSlot(codegen_->GetStackSlot(store->GetLocal())));
1835      break;
1836
1837    default:
1838      LOG(FATAL) << "Unimplemented local type " << field_type;
1839  }
1840}
1841
1842void InstructionCodeGeneratorARM64::VisitStoreLocal(HStoreLocal* store) {
1843  UNUSED(store);
1844}
1845
1846void LocationsBuilderARM64::VisitSub(HSub* instruction) {
1847  HandleBinaryOp(instruction);
1848}
1849
1850void InstructionCodeGeneratorARM64::VisitSub(HSub* instruction) {
1851  HandleBinaryOp(instruction);
1852}
1853
1854void LocationsBuilderARM64::VisitStaticFieldGet(HStaticFieldGet* instruction) {
1855  LocationSummary* locations =
1856      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
1857  locations->SetInAt(0, Location::RequiresRegister());
1858  locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1859}
1860
1861void InstructionCodeGeneratorARM64::VisitStaticFieldGet(HStaticFieldGet* instruction) {
1862  Register cls = InputRegisterAt(instruction, 0);
1863  uint32_t offset = instruction->GetFieldOffset().Uint32Value();
1864  codegen_->Load(instruction->GetType(), OutputCPURegister(instruction), MemOperand(cls, offset));
1865}
1866
1867void LocationsBuilderARM64::VisitStaticFieldSet(HStaticFieldSet* instruction) {
1868  LocationSummary* locations =
1869      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kNoCall);
1870  locations->SetInAt(0, Location::RequiresRegister());
1871  locations->SetInAt(1, Location::RequiresRegister());
1872}
1873
1874void InstructionCodeGeneratorARM64::VisitStaticFieldSet(HStaticFieldSet* instruction) {
1875  CPURegister value = InputCPURegisterAt(instruction, 1);
1876  Register cls = InputRegisterAt(instruction, 0);
1877  uint32_t offset = instruction->GetFieldOffset().Uint32Value();
1878  Primitive::Type field_type = instruction->GetFieldType();
1879
1880  codegen_->Store(field_type, value, MemOperand(cls, offset));
1881  if (field_type == Primitive::kPrimNot) {
1882    codegen_->MarkGCCard(cls, Register(value));
1883  }
1884}
1885
1886void LocationsBuilderARM64::VisitSuspendCheck(HSuspendCheck* instruction) {
1887  new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kCallOnSlowPath);
1888}
1889
1890void InstructionCodeGeneratorARM64::VisitSuspendCheck(HSuspendCheck* instruction) {
1891  // TODO: Improve support for suspend checks.
1892  SuspendCheckSlowPathARM64* slow_path =
1893      new (GetGraph()->GetArena()) SuspendCheckSlowPathARM64(instruction, nullptr);
1894  codegen_->AddSlowPath(slow_path);
1895
1896  __ Subs(wSuspend, wSuspend, 1);
1897  __ B(slow_path->GetEntryLabel(), le);
1898  __ Bind(slow_path->GetReturnLabel());
1899}
1900
1901void LocationsBuilderARM64::VisitTemporary(HTemporary* temp) {
1902  temp->SetLocations(nullptr);
1903}
1904
1905void InstructionCodeGeneratorARM64::VisitTemporary(HTemporary* temp) {
1906  // Nothing to do, this is driven by the code generator.
1907  UNUSED(temp);
1908}
1909
1910void LocationsBuilderARM64::VisitThrow(HThrow* instruction) {
1911  LocationSummary* locations =
1912      new (GetGraph()->GetArena()) LocationSummary(instruction, LocationSummary::kCall);
1913  InvokeRuntimeCallingConvention calling_convention;
1914  locations->SetInAt(0, LocationFrom(calling_convention.GetRegisterAt(0)));
1915}
1916
1917void InstructionCodeGeneratorARM64::VisitThrow(HThrow* instruction) {
1918  codegen_->InvokeRuntime(
1919      QUICK_ENTRY_POINT(pDeliverException), instruction, instruction->GetDexPc());
1920}
1921
1922void LocationsBuilderARM64::VisitTypeConversion(HTypeConversion* conversion) {
1923  LocationSummary* locations =
1924      new (GetGraph()->GetArena()) LocationSummary(conversion, LocationSummary::kNoCall);
1925  Primitive::Type input_type = conversion->GetInputType();
1926  Primitive::Type result_type = conversion->GetResultType();
1927  if ((input_type == Primitive::kPrimNot) || (input_type == Primitive::kPrimVoid) ||
1928      (result_type == Primitive::kPrimNot) || (result_type == Primitive::kPrimVoid)) {
1929    LOG(FATAL) << "Unexpected type conversion from " << input_type << " to " << result_type;
1930  }
1931
1932  if (IsFPType(input_type)) {
1933    locations->SetInAt(0, Location::RequiresFpuRegister());
1934  } else {
1935    locations->SetInAt(0, Location::RequiresRegister());
1936  }
1937
1938  if (IsFPType(result_type)) {
1939    locations->SetOut(Location::RequiresFpuRegister(), Location::kNoOutputOverlap);
1940  } else {
1941    locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
1942  }
1943}
1944
1945void InstructionCodeGeneratorARM64::VisitTypeConversion(HTypeConversion* conversion) {
1946  Primitive::Type result_type = conversion->GetResultType();
1947  Primitive::Type input_type = conversion->GetInputType();
1948
1949  DCHECK_NE(input_type, result_type);
1950
1951  if (IsIntegralType(result_type) && IsIntegralType(input_type)) {
1952    int result_size = Primitive::ComponentSize(result_type);
1953    int input_size = Primitive::ComponentSize(input_type);
1954    int min_size = kBitsPerByte * std::min(result_size, input_size);
1955    if ((result_type == Primitive::kPrimChar) ||
1956        ((input_type == Primitive::kPrimChar) && (result_size > input_size))) {
1957      __ Ubfx(OutputRegister(conversion), InputRegisterAt(conversion, 0), 0, min_size);
1958    } else {
1959      __ Sbfx(OutputRegister(conversion), InputRegisterAt(conversion, 0), 0, min_size);
1960    }
1961    return;
1962  }
1963
1964  LOG(FATAL) << "Unexpected or unimplemented type conversion from " << input_type
1965             << " to " << result_type;
1966}
1967
1968void LocationsBuilderARM64::VisitXor(HXor* instruction) {
1969  HandleBinaryOp(instruction);
1970}
1971
1972void InstructionCodeGeneratorARM64::VisitXor(HXor* instruction) {
1973  HandleBinaryOp(instruction);
1974}
1975
1976#undef __
1977#undef QUICK_ENTRY_POINT
1978
1979}  // namespace arm64
1980}  // namespace art
1981