compiler/optimizing/code_generator_x86.h - platform/art - Git at Google

 /*
  * Copyright (C) 2014 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #ifndef ART_COMPILER_OPTIMIZING_CODE_GENERATOR_X86_H_
 #define ART_COMPILER_OPTIMIZING_CODE_GENERATOR_X86_H_

 #include "code_generator.h"
 #include "dex/compiler_enums.h"
 #include "driver/compiler_options.h"
 #include "nodes.h"
 #include "parallel_move_resolver.h"
 #include "utils/x86/assembler_x86.h"

 namespace art {
 namespace x86 {

 // Use a local definition to prevent copying mistakes.
 static constexpr size_t kX86WordSize = kX86PointerSize;

 class CodeGeneratorX86;
 class SlowPathCodeX86;

 static constexpr Register kParameterCoreRegisters[] = { ECX, EDX, EBX };
 static constexpr RegisterPair kParameterCorePairRegisters[] = { ECX_EDX, EDX_EBX };
 static constexpr size_t kParameterCoreRegistersLength = arraysize(kParameterCoreRegisters);
 static constexpr XmmRegister kParameterFpuRegisters[] = { XMM0, XMM1, XMM2, XMM3 };
 static constexpr size_t kParameterFpuRegistersLength = arraysize(kParameterFpuRegisters);

 class InvokeDexCallingConvention : public CallingConvention<Register, XmmRegister> {
  public:
   InvokeDexCallingConvention() : CallingConvention(
       kParameterCoreRegisters,
       kParameterCoreRegistersLength,
       kParameterFpuRegisters,
       kParameterFpuRegistersLength) {}

   RegisterPair GetRegisterPairAt(size_t argument_index) {
     DCHECK_LT(argument_index + 1, GetNumberOfRegisters());
     return kParameterCorePairRegisters[argument_index];
   }

  private:
   DISALLOW_COPY_AND_ASSIGN(InvokeDexCallingConvention);
 };

 class InvokeDexCallingConventionVisitor {
  public:
   InvokeDexCallingConventionVisitor() : gp_index_(0), fp_index_(0), stack_index_(0) {}

   Location GetNextLocation(Primitive::Type type);

  private:
   InvokeDexCallingConvention calling_convention;
   // The current index for cpu registers.
   uint32_t gp_index_;
   // The current index for fpu registers.
   uint32_t fp_index_;
   // The current stack index.
   uint32_t stack_index_;

   DISALLOW_COPY_AND_ASSIGN(InvokeDexCallingConventionVisitor);
 };

 class ParallelMoveResolverX86 : public ParallelMoveResolver {
  public:
   ParallelMoveResolverX86(ArenaAllocator* allocator, CodeGeneratorX86* codegen)
       : ParallelMoveResolver(allocator), codegen_(codegen) {}

   void EmitMove(size_t index) OVERRIDE;
   void EmitSwap(size_t index) OVERRIDE;
   void SpillScratch(int reg) OVERRIDE;
   void RestoreScratch(int reg) OVERRIDE;

   X86Assembler* GetAssembler() const;

  private:
   void Exchange(Register reg, int mem);
   void Exchange(int mem1, int mem2);
   void Exchange32(XmmRegister reg, int mem);
   void MoveMemoryToMemory32(int dst, int src);
   void MoveMemoryToMemory64(int dst, int src);

   CodeGeneratorX86* const codegen_;

   DISALLOW_COPY_AND_ASSIGN(ParallelMoveResolverX86);
 };

 class LocationsBuilderX86 : public HGraphVisitor {
  public:
   LocationsBuilderX86(HGraph* graph, CodeGeneratorX86* codegen)
       : HGraphVisitor(graph), codegen_(codegen) {}

 #define DECLARE_VISIT_INSTRUCTION(name, super)     \
   void Visit##name(H##name* instr) OVERRIDE;

   FOR_EACH_CONCRETE_INSTRUCTION(DECLARE_VISIT_INSTRUCTION)

 #undef DECLARE_VISIT_INSTRUCTION

  private:
   void HandleBitwiseOperation(HBinaryOperation* instruction);
   void HandleInvoke(HInvoke* invoke);
   void HandleShift(HBinaryOperation* instruction);
   void HandleFieldSet(HInstruction* instruction, const FieldInfo& field_info);
   void HandleFieldGet(HInstruction* instruction, const FieldInfo& field_info);

   CodeGeneratorX86* const codegen_;
   InvokeDexCallingConventionVisitor parameter_visitor_;

   DISALLOW_COPY_AND_ASSIGN(LocationsBuilderX86);
 };

 class InstructionCodeGeneratorX86 : public HGraphVisitor {
  public:
   InstructionCodeGeneratorX86(HGraph* graph, CodeGeneratorX86* codegen);

 #define DECLARE_VISIT_INSTRUCTION(name, super)     \
   void Visit##name(H##name* instr) OVERRIDE;

   FOR_EACH_CONCRETE_INSTRUCTION(DECLARE_VISIT_INSTRUCTION)

 #undef DECLARE_VISIT_INSTRUCTION

   X86Assembler* GetAssembler() const { return assembler_; }

  private:
   // Generate code for the given suspend check. If not null, `successor`
   // is the block to branch to if the suspend check is not needed, and after
   // the suspend call.
   void GenerateSuspendCheck(HSuspendCheck* check, HBasicBlock* successor);
   void GenerateClassInitializationCheck(SlowPathCodeX86* slow_path, Register class_reg);
   void HandleBitwiseOperation(HBinaryOperation* instruction);
   void GenerateDivRemIntegral(HBinaryOperation* instruction);
   void GenerateRemFP(HRem *rem);
   void HandleShift(HBinaryOperation* instruction);
   void GenerateShlLong(const Location& loc, Register shifter);
   void GenerateShrLong(const Location& loc, Register shifter);
   void GenerateUShrLong(const Location& loc, Register shifter);
   void GenerateMemoryBarrier(MemBarrierKind kind);
   void HandleFieldSet(HInstruction* instruction, const FieldInfo& field_info);
   void HandleFieldGet(HInstruction* instruction, const FieldInfo& field_info);
   void PushOntoFPStack(Location source, uint32_t temp_offset,
                        uint32_t stack_adjustment, bool is_float);

   void GenerateImplicitNullCheck(HNullCheck* instruction);
   void GenerateExplicitNullCheck(HNullCheck* instruction);

   X86Assembler* const assembler_;
   CodeGeneratorX86* const codegen_;

   DISALLOW_COPY_AND_ASSIGN(InstructionCodeGeneratorX86);
 };

 class CodeGeneratorX86 : public CodeGenerator {
  public:
   CodeGeneratorX86(HGraph* graph, const CompilerOptions& compiler_options);
   virtual ~CodeGeneratorX86() {}

   void GenerateFrameEntry() OVERRIDE;
   void GenerateFrameExit() OVERRIDE;
   void Bind(HBasicBlock* block) OVERRIDE;
   void Move(HInstruction* instruction, Location location, HInstruction* move_for) OVERRIDE;
   size_t SaveCoreRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;
   size_t RestoreCoreRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;
   size_t SaveFloatingPointRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;
   size_t RestoreFloatingPointRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;

   size_t GetWordSize() const OVERRIDE {
     return kX86WordSize;
   }

   size_t GetFloatingPointSpillSlotSize() const OVERRIDE {
     // 8 bytes == 2 words for each spill.
     return 2 * kX86WordSize;
   }

   HGraphVisitor* GetLocationBuilder() OVERRIDE {
     return &location_builder_;
   }

   HGraphVisitor* GetInstructionVisitor() OVERRIDE {
     return &instruction_visitor_;
   }

   X86Assembler* GetAssembler() OVERRIDE {
     return &assembler_;
   }

   uintptr_t GetAddressOf(HBasicBlock* block) const OVERRIDE {
     return GetLabelOf(block)->Position();
   }

   void SetupBlockedRegisters(bool is_baseline) const OVERRIDE;

   Location AllocateFreeRegister(Primitive::Type type) const OVERRIDE;

   Location GetStackLocation(HLoadLocal* load) const OVERRIDE;

   void DumpCoreRegister(std::ostream& stream, int reg) const OVERRIDE;
   void DumpFloatingPointRegister(std::ostream& stream, int reg) const OVERRIDE;

   // Blocks all register pairs made out of blocked core registers.
   void UpdateBlockedPairRegisters() const;

   ParallelMoveResolverX86* GetMoveResolver() OVERRIDE {
     return &move_resolver_;
   }

   InstructionSet GetInstructionSet() const OVERRIDE {
     return InstructionSet::kX86;
   }

   // Helper method to move a 32bits value between two locations.
   void Move32(Location destination, Location source);
   // Helper method to move a 64bits value between two locations.
   void Move64(Location destination, Location source);

   // Generate a call to a static or direct method.
   void GenerateStaticOrDirectCall(HInvokeStaticOrDirect* invoke, Register temp);

   // Emit a write barrier.
   void MarkGCCard(Register temp, Register card, Register object, Register value);

   void LoadCurrentMethod(Register reg);

   Label* GetLabelOf(HBasicBlock* block) const {
     return CommonGetLabelOf<Label>(block_labels_.GetRawStorage(), block);
   }

   void Initialize() OVERRIDE {
     block_labels_.SetSize(GetGraph()->GetBlocks().Size());
   }

   bool NeedsTwoRegisters(Primitive::Type type) const OVERRIDE {
     return type == Primitive::kPrimLong;
   }

   bool ShouldSplitLongMoves() const OVERRIDE { return true; }

   Label* GetFrameEntryLabel() { return &frame_entry_label_; }

  private:
   // Labels for each block that will be compiled.
   GrowableArray<Label> block_labels_;
   Label frame_entry_label_;
   LocationsBuilderX86 location_builder_;
   InstructionCodeGeneratorX86 instruction_visitor_;
   ParallelMoveResolverX86 move_resolver_;
   X86Assembler assembler_;

   DISALLOW_COPY_AND_ASSIGN(CodeGeneratorX86);
 };

 class SlowPathCodeX86 : public SlowPathCode {
  public:
   SlowPathCodeX86() : entry_label_(), exit_label_() {}

   Label* GetEntryLabel() { return &entry_label_; }
   Label* GetExitLabel() { return &exit_label_; }

  private:
   Label entry_label_;
   Label exit_label_;

   DISALLOW_COPY_AND_ASSIGN(SlowPathCodeX86);
 };

 }  // namespace x86
 }  // namespace art

 #endif  // ART_COMPILER_OPTIMIZING_CODE_GENERATOR_X86_H_
	/*
	* Copyright (C) 2014 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#ifndef ART_COMPILER_OPTIMIZING_CODE_GENERATOR_X86_H_
	#define ART_COMPILER_OPTIMIZING_CODE_GENERATOR_X86_H_

	#include "code_generator.h"
	#include "dex/compiler_enums.h"
	#include "driver/compiler_options.h"
	#include "nodes.h"
	#include "parallel_move_resolver.h"
	#include "utils/x86/assembler_x86.h"

	namespace art {
	namespace x86 {

	// Use a local definition to prevent copying mistakes.
	static constexpr size_t kX86WordSize = kX86PointerSize;

	class CodeGeneratorX86;
	class SlowPathCodeX86;

	static constexpr Register kParameterCoreRegisters[] = { ECX, EDX, EBX };
	static constexpr RegisterPair kParameterCorePairRegisters[] = { ECX_EDX, EDX_EBX };
	static constexpr size_t kParameterCoreRegistersLength = arraysize(kParameterCoreRegisters);
	static constexpr XmmRegister kParameterFpuRegisters[] = { XMM0, XMM1, XMM2, XMM3 };
	static constexpr size_t kParameterFpuRegistersLength = arraysize(kParameterFpuRegisters);

	class InvokeDexCallingConvention : public CallingConvention<Register, XmmRegister> {
	public:
	InvokeDexCallingConvention() : CallingConvention(
	kParameterCoreRegisters,
	kParameterCoreRegistersLength,
	kParameterFpuRegisters,
	kParameterFpuRegistersLength) {}

	RegisterPair GetRegisterPairAt(size_t argument_index) {
	DCHECK_LT(argument_index + 1, GetNumberOfRegisters());
	return kParameterCorePairRegisters[argument_index];
	}

	private:
	DISALLOW_COPY_AND_ASSIGN(InvokeDexCallingConvention);
	};

	class InvokeDexCallingConventionVisitor {
	public:
	InvokeDexCallingConventionVisitor() : gp_index_(0), fp_index_(0), stack_index_(0) {}

	Location GetNextLocation(Primitive::Type type);

	private:
	InvokeDexCallingConvention calling_convention;
	// The current index for cpu registers.
	uint32_t gp_index_;
	// The current index for fpu registers.
	uint32_t fp_index_;
	// The current stack index.
	uint32_t stack_index_;

	DISALLOW_COPY_AND_ASSIGN(InvokeDexCallingConventionVisitor);
	};

	class ParallelMoveResolverX86 : public ParallelMoveResolver {
	public:
	ParallelMoveResolverX86(ArenaAllocator* allocator, CodeGeneratorX86* codegen)
	: ParallelMoveResolver(allocator), codegen_(codegen) {}

	void EmitMove(size_t index) OVERRIDE;
	void EmitSwap(size_t index) OVERRIDE;
	void SpillScratch(int reg) OVERRIDE;
	void RestoreScratch(int reg) OVERRIDE;

	X86Assembler* GetAssembler() const;

	private:
	void Exchange(Register reg, int mem);
	void Exchange(int mem1, int mem2);
	void Exchange32(XmmRegister reg, int mem);
	void MoveMemoryToMemory32(int dst, int src);
	void MoveMemoryToMemory64(int dst, int src);

	CodeGeneratorX86* const codegen_;

	DISALLOW_COPY_AND_ASSIGN(ParallelMoveResolverX86);
	};

	class LocationsBuilderX86 : public HGraphVisitor {
	public:
	LocationsBuilderX86(HGraph* graph, CodeGeneratorX86* codegen)
	: HGraphVisitor(graph), codegen_(codegen) {}

	#define DECLARE_VISIT_INSTRUCTION(name, super) \
	void Visit##name(H##name* instr) OVERRIDE;

	FOR_EACH_CONCRETE_INSTRUCTION(DECLARE_VISIT_INSTRUCTION)

	#undef DECLARE_VISIT_INSTRUCTION

	private:
	void HandleBitwiseOperation(HBinaryOperation* instruction);
	void HandleInvoke(HInvoke* invoke);
	void HandleShift(HBinaryOperation* instruction);
	void HandleFieldSet(HInstruction* instruction, const FieldInfo& field_info);
	void HandleFieldGet(HInstruction* instruction, const FieldInfo& field_info);

	CodeGeneratorX86* const codegen_;
	InvokeDexCallingConventionVisitor parameter_visitor_;

	DISALLOW_COPY_AND_ASSIGN(LocationsBuilderX86);
	};

	class InstructionCodeGeneratorX86 : public HGraphVisitor {
	public:
	InstructionCodeGeneratorX86(HGraph* graph, CodeGeneratorX86* codegen);

	#define DECLARE_VISIT_INSTRUCTION(name, super) \
	void Visit##name(H##name* instr) OVERRIDE;

	FOR_EACH_CONCRETE_INSTRUCTION(DECLARE_VISIT_INSTRUCTION)

	#undef DECLARE_VISIT_INSTRUCTION

	X86Assembler* GetAssembler() const { return assembler_; }

	private:
	// Generate code for the given suspend check. If not null, `successor`
	// is the block to branch to if the suspend check is not needed, and after
	// the suspend call.
	void GenerateSuspendCheck(HSuspendCheck* check, HBasicBlock* successor);
	void GenerateClassInitializationCheck(SlowPathCodeX86* slow_path, Register class_reg);
	void HandleBitwiseOperation(HBinaryOperation* instruction);
	void GenerateDivRemIntegral(HBinaryOperation* instruction);
	void GenerateRemFP(HRem *rem);
	void HandleShift(HBinaryOperation* instruction);
	void GenerateShlLong(const Location& loc, Register shifter);
	void GenerateShrLong(const Location& loc, Register shifter);
	void GenerateUShrLong(const Location& loc, Register shifter);
	void GenerateMemoryBarrier(MemBarrierKind kind);
	void HandleFieldSet(HInstruction* instruction, const FieldInfo& field_info);
	void HandleFieldGet(HInstruction* instruction, const FieldInfo& field_info);
	void PushOntoFPStack(Location source, uint32_t temp_offset,
	uint32_t stack_adjustment, bool is_float);

	void GenerateImplicitNullCheck(HNullCheck* instruction);
	void GenerateExplicitNullCheck(HNullCheck* instruction);

	X86Assembler* const assembler_;
	CodeGeneratorX86* const codegen_;

	DISALLOW_COPY_AND_ASSIGN(InstructionCodeGeneratorX86);
	};

	class CodeGeneratorX86 : public CodeGenerator {
	public:
	CodeGeneratorX86(HGraph* graph, const CompilerOptions& compiler_options);
	virtual ~CodeGeneratorX86() {}

	void GenerateFrameEntry() OVERRIDE;
	void GenerateFrameExit() OVERRIDE;
	void Bind(HBasicBlock* block) OVERRIDE;
	void Move(HInstruction* instruction, Location location, HInstruction* move_for) OVERRIDE;
	size_t SaveCoreRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;
	size_t RestoreCoreRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;
	size_t SaveFloatingPointRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;
	size_t RestoreFloatingPointRegister(size_t stack_index, uint32_t reg_id) OVERRIDE;

	size_t GetWordSize() const OVERRIDE {
	return kX86WordSize;
	}

	size_t GetFloatingPointSpillSlotSize() const OVERRIDE {
	// 8 bytes == 2 words for each spill.
	return 2 * kX86WordSize;
	}

	HGraphVisitor* GetLocationBuilder() OVERRIDE {
	return &location_builder_;
	}

	HGraphVisitor* GetInstructionVisitor() OVERRIDE {
	return &instruction_visitor_;
	}

	X86Assembler* GetAssembler() OVERRIDE {
	return &assembler_;
	}

	uintptr_t GetAddressOf(HBasicBlock* block) const OVERRIDE {
	return GetLabelOf(block)->Position();
	}

	void SetupBlockedRegisters(bool is_baseline) const OVERRIDE;

	Location AllocateFreeRegister(Primitive::Type type) const OVERRIDE;

	Location GetStackLocation(HLoadLocal* load) const OVERRIDE;

	void DumpCoreRegister(std::ostream& stream, int reg) const OVERRIDE;
	void DumpFloatingPointRegister(std::ostream& stream, int reg) const OVERRIDE;

	// Blocks all register pairs made out of blocked core registers.
	void UpdateBlockedPairRegisters() const;

	ParallelMoveResolverX86* GetMoveResolver() OVERRIDE {
	return &move_resolver_;
	}

	InstructionSet GetInstructionSet() const OVERRIDE {
	return InstructionSet::kX86;
	}

	// Helper method to move a 32bits value between two locations.
	void Move32(Location destination, Location source);
	// Helper method to move a 64bits value between two locations.
	void Move64(Location destination, Location source);

	// Generate a call to a static or direct method.
	void GenerateStaticOrDirectCall(HInvokeStaticOrDirect* invoke, Register temp);

	// Emit a write barrier.
	void MarkGCCard(Register temp, Register card, Register object, Register value);

	void LoadCurrentMethod(Register reg);

	Label* GetLabelOf(HBasicBlock* block) const {
	return CommonGetLabelOf<Label>(block_labels_.GetRawStorage(), block);
	}

	void Initialize() OVERRIDE {
	block_labels_.SetSize(GetGraph()->GetBlocks().Size());
	}

	bool NeedsTwoRegisters(Primitive::Type type) const OVERRIDE {
	return type == Primitive::kPrimLong;
	}

	bool ShouldSplitLongMoves() const OVERRIDE { return true; }

	Label* GetFrameEntryLabel() { return &frame_entry_label_; }

	private:
	// Labels for each block that will be compiled.
	GrowableArray<Label> block_labels_;
	Label frame_entry_label_;
	LocationsBuilderX86 location_builder_;
	InstructionCodeGeneratorX86 instruction_visitor_;
	ParallelMoveResolverX86 move_resolver_;
	X86Assembler assembler_;

	DISALLOW_COPY_AND_ASSIGN(CodeGeneratorX86);
	};

	class SlowPathCodeX86 : public SlowPathCode {
	public:
	SlowPathCodeX86() : entry_label_(), exit_label_() {}

	Label* GetEntryLabel() { return &entry_label_; }
	Label* GetExitLabel() { return &exit_label_; }

	private:
	Label entry_label_;
	Label exit_label_;

	DISALLOW_COPY_AND_ASSIGN(SlowPathCodeX86);
	};

	} // namespace x86
	} // namespace art

	#endif // ART_COMPILER_OPTIMIZING_CODE_GENERATOR_X86_H_