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/*
* 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);
// 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);
};
} // namespace x86
} // namespace art
#endif // ART_COMPILER_OPTIMIZING_CODE_GENERATOR_X86_H_