code_generator_x86_64.h revision 3d21bdf8894e780d349c481e5c9e29fe1556051c 
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 "driver/compiler_options.h"
23#include "nodes.h"
24#include "parallel_move_resolver.h"
25#include "utils/x86_64/assembler_x86_64.h"
26
27namespace art {
28namespace x86_64 {
29
30// Use a local definition to prevent copying mistakes.
31static constexpr size_t kX86_64WordSize = kX86_64PointerSize;
32
33static constexpr Register kParameterCoreRegisters[] = { RSI, RDX, RCX, R8, R9 };
34static constexpr FloatRegister kParameterFloatRegisters[] =
35    { XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7 };
36
37static constexpr size_t kParameterCoreRegistersLength = arraysize(kParameterCoreRegisters);
38static constexpr size_t kParameterFloatRegistersLength = arraysize(kParameterFloatRegisters);
39
40static constexpr Register kRuntimeParameterCoreRegisters[] = { RDI, RSI, RDX, RCX };
41static constexpr size_t kRuntimeParameterCoreRegistersLength =
42    arraysize(kRuntimeParameterCoreRegisters);
43static constexpr FloatRegister kRuntimeParameterFpuRegisters[] = { XMM0, XMM1 };
44static constexpr size_t kRuntimeParameterFpuRegistersLength =
45    arraysize(kRuntimeParameterFpuRegisters);
46
47class InvokeRuntimeCallingConvention : public CallingConvention<Register, FloatRegister> {
48 public:
49  InvokeRuntimeCallingConvention()
50      : CallingConvention(kRuntimeParameterCoreRegisters,
51                          kRuntimeParameterCoreRegistersLength,
52                          kRuntimeParameterFpuRegisters,
53                          kRuntimeParameterFpuRegistersLength,
54                          kX86_64PointerSize) {}
55
56 private:
57  DISALLOW_COPY_AND_ASSIGN(InvokeRuntimeCallingConvention);
58};
59
60class InvokeDexCallingConvention : public CallingConvention<Register, FloatRegister> {
61 public:
62  InvokeDexCallingConvention() : CallingConvention(
63      kParameterCoreRegisters,
64      kParameterCoreRegistersLength,
65      kParameterFloatRegisters,
66      kParameterFloatRegistersLength,
67      kX86_64PointerSize) {}
68
69 private:
70  DISALLOW_COPY_AND_ASSIGN(InvokeDexCallingConvention);
71};
72
73class InvokeDexCallingConventionVisitorX86_64 : public InvokeDexCallingConventionVisitor {
74 public:
75  InvokeDexCallingConventionVisitorX86_64() {}
76  virtual ~InvokeDexCallingConventionVisitorX86_64() {}
77
78  Location GetNextLocation(Primitive::Type type) OVERRIDE;
79
80 private:
81  InvokeDexCallingConvention calling_convention;
82
83  DISALLOW_COPY_AND_ASSIGN(InvokeDexCallingConventionVisitorX86_64);
84};
85
86class CodeGeneratorX86_64;
87
88class SlowPathCodeX86_64 : public SlowPathCode {
89 public:
90  SlowPathCodeX86_64() : entry_label_(), exit_label_() {}
91
92  Label* GetEntryLabel() { return &entry_label_; }
93  Label* GetExitLabel() { return &exit_label_; }
94
95 private:
96  Label entry_label_;
97  Label exit_label_;
98
99  DISALLOW_COPY_AND_ASSIGN(SlowPathCodeX86_64);
100};
101
102class ParallelMoveResolverX86_64 : public ParallelMoveResolverWithSwap {
103 public:
104  ParallelMoveResolverX86_64(ArenaAllocator* allocator, CodeGeneratorX86_64* codegen)
105      : ParallelMoveResolverWithSwap(allocator), codegen_(codegen) {}
106
107  void EmitMove(size_t index) OVERRIDE;
108  void EmitSwap(size_t index) OVERRIDE;
109  void SpillScratch(int reg) OVERRIDE;
110  void RestoreScratch(int reg) OVERRIDE;
111
112  X86_64Assembler* GetAssembler() const;
113
114 private:
115  void Exchange32(CpuRegister reg, int mem);
116  void Exchange32(XmmRegister reg, int mem);
117  void Exchange32(int mem1, int mem2);
118  void Exchange64(CpuRegister reg, int mem);
119  void Exchange64(XmmRegister reg, int mem);
120  void Exchange64(int mem1, int mem2);
121
122  CodeGeneratorX86_64* const codegen_;
123
124  DISALLOW_COPY_AND_ASSIGN(ParallelMoveResolverX86_64);
125};
126
127class LocationsBuilderX86_64 : public HGraphVisitor {
128 public:
129  LocationsBuilderX86_64(HGraph* graph, CodeGeneratorX86_64* codegen)
130      : HGraphVisitor(graph), codegen_(codegen) {}
131
132#define DECLARE_VISIT_INSTRUCTION(name, super)     \
133  void Visit##name(H##name* instr) OVERRIDE;
134
135  FOR_EACH_CONCRETE_INSTRUCTION(DECLARE_VISIT_INSTRUCTION)
136
137#undef DECLARE_VISIT_INSTRUCTION
138
139 private:
140  void HandleInvoke(HInvoke* invoke);
141  void HandleBitwiseOperation(HBinaryOperation* operation);
142  void HandleShift(HBinaryOperation* operation);
143  void HandleFieldSet(HInstruction* instruction, const FieldInfo& field_info);
144  void HandleFieldGet(HInstruction* instruction);
145
146  CodeGeneratorX86_64* const codegen_;
147  InvokeDexCallingConventionVisitorX86_64 parameter_visitor_;
148
149  DISALLOW_COPY_AND_ASSIGN(LocationsBuilderX86_64);
150};
151
152class InstructionCodeGeneratorX86_64 : public HGraphVisitor {
153 public:
154  InstructionCodeGeneratorX86_64(HGraph* graph, CodeGeneratorX86_64* codegen);
155
156#define DECLARE_VISIT_INSTRUCTION(name, super)     \
157  void Visit##name(H##name* instr) OVERRIDE;
158
159  FOR_EACH_CONCRETE_INSTRUCTION(DECLARE_VISIT_INSTRUCTION)
160
161#undef DECLARE_VISIT_INSTRUCTION
162
163  X86_64Assembler* GetAssembler() const { return assembler_; }
164
165 private:
166  // Generate code for the given suspend check. If not null, `successor`
167  // is the block to branch to if the suspend check is not needed, and after
168  // the suspend call.
169  void GenerateSuspendCheck(HSuspendCheck* instruction, HBasicBlock* successor);
170  void GenerateClassInitializationCheck(SlowPathCodeX86_64* slow_path, CpuRegister class_reg);
171  void HandleBitwiseOperation(HBinaryOperation* operation);
172  void GenerateRemFP(HRem *rem);
173  void DivRemOneOrMinusOne(HBinaryOperation* instruction);
174  void DivByPowerOfTwo(HDiv* instruction);
175  void GenerateDivRemWithAnyConstant(HBinaryOperation* instruction);
176  void GenerateDivRemIntegral(HBinaryOperation* instruction);
177  void HandleShift(HBinaryOperation* operation);
178  void GenerateMemoryBarrier(MemBarrierKind kind);
179  void HandleFieldSet(HInstruction* instruction, const FieldInfo& field_info);
180  void HandleFieldGet(HInstruction* instruction, const FieldInfo& field_info);
181  void GenerateImplicitNullCheck(HNullCheck* instruction);
182  void GenerateExplicitNullCheck(HNullCheck* instruction);
183  void PushOntoFPStack(Location source, uint32_t temp_offset,
184                       uint32_t stack_adjustment, bool is_float);
185  void GenerateTestAndBranch(HInstruction* instruction,
186                             Label* true_target,
187                             Label* false_target,
188                             Label* always_true_target);
189
190  X86_64Assembler* const assembler_;
191  CodeGeneratorX86_64* const codegen_;
192
193  DISALLOW_COPY_AND_ASSIGN(InstructionCodeGeneratorX86_64);
194};
195
196class CodeGeneratorX86_64 : public CodeGenerator {
197 public:
198  CodeGeneratorX86_64(HGraph* graph,
199                  const X86_64InstructionSetFeatures& isa_features,
200                  const CompilerOptions& compiler_options);
201  virtual ~CodeGeneratorX86_64() {}
202
203  void GenerateFrameEntry() OVERRIDE;
204  void GenerateFrameExit() OVERRIDE;
205  void Bind(HBasicBlock* block) OVERRIDE;
206  void Move(HInstruction* instruction, Location location, HInstruction* move_for) OVERRIDE;
207  size_t SaveCoreRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;
208  size_t RestoreCoreRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;
209  size_t SaveFloatingPointRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;
210  size_t RestoreFloatingPointRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;
211
212  size_t GetWordSize() const OVERRIDE {
213    return kX86_64WordSize;
214  }
215
216  size_t GetFloatingPointSpillSlotSize() const OVERRIDE {
217    return kX86_64WordSize;
218  }
219
220  HGraphVisitor* GetLocationBuilder() OVERRIDE {
221    return &location_builder_;
222  }
223
224  HGraphVisitor* GetInstructionVisitor() OVERRIDE {
225    return &instruction_visitor_;
226  }
227
228  X86_64Assembler* GetAssembler() OVERRIDE {
229    return &assembler_;
230  }
231
232  ParallelMoveResolverX86_64* GetMoveResolver() OVERRIDE {
233    return &move_resolver_;
234  }
235
236  uintptr_t GetAddressOf(HBasicBlock* block) const OVERRIDE {
237    return GetLabelOf(block)->Position();
238  }
239
240  Location GetStackLocation(HLoadLocal* load) const OVERRIDE;
241
242  void SetupBlockedRegisters(bool is_baseline) const OVERRIDE;
243  Location AllocateFreeRegister(Primitive::Type type) const OVERRIDE;
244  void DumpCoreRegister(std::ostream& stream, int reg) const OVERRIDE;
245  void DumpFloatingPointRegister(std::ostream& stream, int reg) const OVERRIDE;
246  void Finalize(CodeAllocator* allocator) OVERRIDE;
247
248  InstructionSet GetInstructionSet() const OVERRIDE {
249    return InstructionSet::kX86_64;
250  }
251
252  // Emit a write barrier.
253  void MarkGCCard(CpuRegister temp, CpuRegister card, CpuRegister object, CpuRegister value);
254
255  // Helper method to move a value between two locations.
256  void Move(Location destination, Location source);
257
258  void LoadCurrentMethod(CpuRegister reg);
259
260  Label* GetLabelOf(HBasicBlock* block) const {
261    return CommonGetLabelOf<Label>(block_labels_.GetRawStorage(), block);
262  }
263
264  void Initialize() OVERRIDE {
265    block_labels_.SetSize(GetGraph()->GetBlocks().Size());
266  }
267
268  bool NeedsTwoRegisters(Primitive::Type type ATTRIBUTE_UNUSED) const OVERRIDE {
269    return false;
270  }
271
272  void GenerateStaticOrDirectCall(HInvokeStaticOrDirect* invoke, CpuRegister temp);
273
274  const X86_64InstructionSetFeatures& GetInstructionSetFeatures() const {
275    return isa_features_;
276  }
277
278  int ConstantAreaStart() const {
279    return constant_area_start_;
280  }
281
282  Address LiteralDoubleAddress(double v);
283  Address LiteralFloatAddress(float v);
284  Address LiteralInt32Address(int32_t v);
285  Address LiteralInt64Address(int64_t v);
286
287  // Load a 64 bit value into a register in the most efficient manner.
288  void Load64BitValue(CpuRegister dest, int64_t value);
289
290 private:
291  // Labels for each block that will be compiled.
292  GrowableArray<Label> block_labels_;
293  Label frame_entry_label_;
294  LocationsBuilderX86_64 location_builder_;
295  InstructionCodeGeneratorX86_64 instruction_visitor_;
296  ParallelMoveResolverX86_64 move_resolver_;
297  X86_64Assembler assembler_;
298  const X86_64InstructionSetFeatures& isa_features_;
299
300  // Offset to the start of the constant area in the assembled code.
301  // Used for fixups to the constant area.
302  int constant_area_start_;
303
304  DISALLOW_COPY_AND_ASSIGN(CodeGeneratorX86_64);
305};
306
307}  // namespace x86_64
308}  // namespace art
309
310#endif  // ART_COMPILER_OPTIMIZING_CODE_GENERATOR_X86_64_H_
311