code_generator_x86_64.h revision 71fb52fee246b7d511f520febbd73dc7a9bbca79 
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#ifndef ART_COMPILER_OPTIMIZING_CODE_GENERATOR_X86_64_H_
18#define ART_COMPILER_OPTIMIZING_CODE_GENERATOR_X86_64_H_
19
20#include "code_generator.h"
21#include "dex/compiler_enums.h"
22#include "nodes.h"
23#include "parallel_move_resolver.h"
24#include "utils/x86_64/assembler_x86_64.h"
25
26namespace art {
27namespace x86_64 {
28
29// Use a local definition to prevent copying mistakes.
30static constexpr size_t kX86_64WordSize = kX86_64PointerSize;
31
32static constexpr Register kParameterCoreRegisters[] = { RSI, RDX, RCX, R8, R9 };
33static constexpr FloatRegister kParameterFloatRegisters[] =
34    { XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7 };
35
36static constexpr size_t kParameterCoreRegistersLength = arraysize(kParameterCoreRegisters);
37static constexpr size_t kParameterFloatRegistersLength = arraysize(kParameterFloatRegisters);
38
39static constexpr bool kCoalescedImplicitNullCheck = false;
40
41class InvokeDexCallingConvention : public CallingConvention<Register, FloatRegister> {
42 public:
43  InvokeDexCallingConvention() : CallingConvention(
44      kParameterCoreRegisters,
45      kParameterCoreRegistersLength,
46      kParameterFloatRegisters,
47      kParameterFloatRegistersLength) {}
48
49 private:
50  DISALLOW_COPY_AND_ASSIGN(InvokeDexCallingConvention);
51};
52
53class InvokeDexCallingConventionVisitor {
54 public:
55  InvokeDexCallingConventionVisitor() : gp_index_(0), fp_index_(0), stack_index_(0) {}
56
57  Location GetNextLocation(Primitive::Type type);
58
59 private:
60  InvokeDexCallingConvention calling_convention;
61  // The current index for cpu registers.
62  uint32_t gp_index_;
63  // The current index for fpu registers.
64  uint32_t fp_index_;
65  // The current stack index.
66  uint32_t stack_index_;
67
68  DISALLOW_COPY_AND_ASSIGN(InvokeDexCallingConventionVisitor);
69};
70
71class CodeGeneratorX86_64;
72
73class SlowPathCodeX86_64 : public SlowPathCode {
74 public:
75  SlowPathCodeX86_64() : entry_label_(), exit_label_() {}
76
77  Label* GetEntryLabel() { return &entry_label_; }
78  Label* GetExitLabel() { return &exit_label_; }
79
80 private:
81  Label entry_label_;
82  Label exit_label_;
83
84  DISALLOW_COPY_AND_ASSIGN(SlowPathCodeX86_64);
85};
86
87class ParallelMoveResolverX86_64 : public ParallelMoveResolver {
88 public:
89  ParallelMoveResolverX86_64(ArenaAllocator* allocator, CodeGeneratorX86_64* codegen)
90      : ParallelMoveResolver(allocator), codegen_(codegen) {}
91
92  void EmitMove(size_t index) OVERRIDE;
93  void EmitSwap(size_t index) OVERRIDE;
94  void SpillScratch(int reg) OVERRIDE;
95  void RestoreScratch(int reg) OVERRIDE;
96
97  X86_64Assembler* GetAssembler() const;
98
99 private:
100  void Exchange32(CpuRegister reg, int mem);
101  void Exchange32(XmmRegister reg, int mem);
102  void Exchange32(int mem1, int mem2);
103  void Exchange64(CpuRegister reg, int mem);
104  void Exchange64(XmmRegister reg, int mem);
105  void Exchange64(int mem1, int mem2);
106
107  CodeGeneratorX86_64* const codegen_;
108
109  DISALLOW_COPY_AND_ASSIGN(ParallelMoveResolverX86_64);
110};
111
112class LocationsBuilderX86_64 : public HGraphVisitor {
113 public:
114  LocationsBuilderX86_64(HGraph* graph, CodeGeneratorX86_64* codegen)
115      : HGraphVisitor(graph), codegen_(codegen) {}
116
117#define DECLARE_VISIT_INSTRUCTION(name, super)     \
118  void Visit##name(H##name* instr) OVERRIDE;
119
120  FOR_EACH_CONCRETE_INSTRUCTION(DECLARE_VISIT_INSTRUCTION)
121
122#undef DECLARE_VISIT_INSTRUCTION
123
124 private:
125  void HandleInvoke(HInvoke* invoke);
126  void HandleBitwiseOperation(HBinaryOperation* operation);
127  void HandleShift(HBinaryOperation* operation);
128  void HandleFieldSet(HInstruction* instruction, const FieldInfo& field_info);
129  void HandleFieldGet(HInstruction* instruction);
130
131  CodeGeneratorX86_64* const codegen_;
132  InvokeDexCallingConventionVisitor parameter_visitor_;
133
134  DISALLOW_COPY_AND_ASSIGN(LocationsBuilderX86_64);
135};
136
137class InstructionCodeGeneratorX86_64 : public HGraphVisitor {
138 public:
139  InstructionCodeGeneratorX86_64(HGraph* graph, CodeGeneratorX86_64* codegen);
140
141#define DECLARE_VISIT_INSTRUCTION(name, super)     \
142  void Visit##name(H##name* instr) OVERRIDE;
143
144  FOR_EACH_CONCRETE_INSTRUCTION(DECLARE_VISIT_INSTRUCTION)
145
146#undef DECLARE_VISIT_INSTRUCTION
147
148  X86_64Assembler* GetAssembler() const { return assembler_; }
149
150 private:
151  // Generate code for the given suspend check. If not null, `successor`
152  // is the block to branch to if the suspend check is not needed, and after
153  // the suspend call.
154  void GenerateSuspendCheck(HSuspendCheck* instruction, HBasicBlock* successor);
155  void GenerateClassInitializationCheck(SlowPathCodeX86_64* slow_path, CpuRegister class_reg);
156  void HandleBitwiseOperation(HBinaryOperation* operation);
157  void GenerateDivRemIntegral(HBinaryOperation* instruction);
158  void HandleShift(HBinaryOperation* operation);
159  void GenerateMemoryBarrier(MemBarrierKind kind);
160  void HandleFieldSet(HInstruction* instruction, const FieldInfo& field_info);
161  void HandleFieldGet(HInstruction* instruction, const FieldInfo& field_info);
162
163  X86_64Assembler* const assembler_;
164  CodeGeneratorX86_64* const codegen_;
165
166  DISALLOW_COPY_AND_ASSIGN(InstructionCodeGeneratorX86_64);
167};
168
169class CodeGeneratorX86_64 : public CodeGenerator {
170 public:
171  explicit CodeGeneratorX86_64(HGraph* graph);
172  virtual ~CodeGeneratorX86_64() {}
173
174  void GenerateFrameEntry() OVERRIDE;
175  void GenerateFrameExit() OVERRIDE;
176  void Bind(HBasicBlock* block) OVERRIDE;
177  void Move(HInstruction* instruction, Location location, HInstruction* move_for) OVERRIDE;
178  size_t SaveCoreRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;
179  size_t RestoreCoreRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;
180  size_t SaveFloatingPointRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;
181  size_t RestoreFloatingPointRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;
182
183  size_t GetWordSize() const OVERRIDE {
184    return kX86_64WordSize;
185  }
186
187  size_t GetFloatingPointSpillSlotSize() const OVERRIDE {
188    return kX86_64WordSize;
189  }
190
191  size_t FrameEntrySpillSize() const OVERRIDE;
192
193  HGraphVisitor* GetLocationBuilder() OVERRIDE {
194    return &location_builder_;
195  }
196
197  HGraphVisitor* GetInstructionVisitor() OVERRIDE {
198    return &instruction_visitor_;
199  }
200
201  X86_64Assembler* GetAssembler() OVERRIDE {
202    return &assembler_;
203  }
204
205  ParallelMoveResolverX86_64* GetMoveResolver() OVERRIDE {
206    return &move_resolver_;
207  }
208
209  uintptr_t GetAddressOf(HBasicBlock* block) const OVERRIDE {
210    return GetLabelOf(block)->Position();
211  }
212
213  Location GetStackLocation(HLoadLocal* load) const OVERRIDE;
214
215  void SetupBlockedRegisters() const OVERRIDE;
216  Location AllocateFreeRegister(Primitive::Type type) const OVERRIDE;
217  void DumpCoreRegister(std::ostream& stream, int reg) const OVERRIDE;
218  void DumpFloatingPointRegister(std::ostream& stream, int reg) const OVERRIDE;
219
220  InstructionSet GetInstructionSet() const OVERRIDE {
221    return InstructionSet::kX86_64;
222  }
223
224  // Emit a write barrier.
225  void MarkGCCard(CpuRegister temp, CpuRegister card, CpuRegister object, CpuRegister value);
226
227  // Helper method to move a value between two locations.
228  void Move(Location destination, Location source);
229
230  void LoadCurrentMethod(CpuRegister reg);
231
232  Label* GetLabelOf(HBasicBlock* block) const {
233    return block_labels_.GetRawStorage() + block->GetBlockId();
234  }
235
236  void Initialize() OVERRIDE {
237    block_labels_.SetSize(GetGraph()->GetBlocks().Size());
238  }
239
240  bool NeedsTwoRegisters(Primitive::Type type ATTRIBUTE_UNUSED) const OVERRIDE {
241    return false;
242  }
243
244  void GenerateStaticOrDirectCall(HInvokeStaticOrDirect* invoke, CpuRegister temp);
245
246 private:
247  // Labels for each block that will be compiled.
248  GrowableArray<Label> block_labels_;
249  LocationsBuilderX86_64 location_builder_;
250  InstructionCodeGeneratorX86_64 instruction_visitor_;
251  ParallelMoveResolverX86_64 move_resolver_;
252  X86_64Assembler assembler_;
253
254  DISALLOW_COPY_AND_ASSIGN(CodeGeneratorX86_64);
255};
256
257}  // namespace x86_64
258}  // namespace art
259
260#endif  // ART_COMPILER_OPTIMIZING_CODE_GENERATOR_X86_64_H_
261