1// Copyright 2012 the V8 project authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#ifndef V8_CODEGEN_H_ 6#define V8_CODEGEN_H_ 7 8#include "src/code-stubs.h" 9#include "src/runtime.h" 10 11// Include the declaration of the architecture defined class CodeGenerator. 12// The contract to the shared code is that the the CodeGenerator is a subclass 13// of Visitor and that the following methods are available publicly: 14// MakeCode 15// MakeCodePrologue 16// MakeCodeEpilogue 17// masm 18// frame 19// script 20// has_valid_frame 21// SetFrame 22// DeleteFrame 23// allocator 24// AddDeferred 25// in_spilled_code 26// set_in_spilled_code 27// RecordPositions 28// 29// These methods are either used privately by the shared code or implemented as 30// shared code: 31// CodeGenerator 32// ~CodeGenerator 33// Generate 34// ComputeLazyCompile 35// BuildFunctionInfo 36// ProcessDeclarations 37// DeclareGlobals 38// CheckForInlineRuntimeCall 39// AnalyzeCondition 40// CodeForFunctionPosition 41// CodeForReturnPosition 42// CodeForStatementPosition 43// CodeForDoWhileConditionPosition 44// CodeForSourcePosition 45 46enum TypeofState { INSIDE_TYPEOF, NOT_INSIDE_TYPEOF }; 47 48#if V8_TARGET_ARCH_IA32 49#include "src/ia32/codegen-ia32.h" // NOLINT 50#elif V8_TARGET_ARCH_X64 51#include "src/x64/codegen-x64.h" // NOLINT 52#elif V8_TARGET_ARCH_ARM64 53#include "src/arm64/codegen-arm64.h" // NOLINT 54#elif V8_TARGET_ARCH_ARM 55#include "src/arm/codegen-arm.h" // NOLINT 56#elif V8_TARGET_ARCH_MIPS 57#include "src/mips/codegen-mips.h" // NOLINT 58#elif V8_TARGET_ARCH_MIPS64 59#include "src/mips64/codegen-mips64.h" // NOLINT 60#elif V8_TARGET_ARCH_X87 61#include "src/x87/codegen-x87.h" // NOLINT 62#else 63#error Unsupported target architecture. 64#endif 65 66namespace v8 { 67namespace internal { 68 69 70class CompilationInfo; 71 72 73class CodeGenerator { 74 public: 75 // Printing of AST, etc. as requested by flags. 76 static void MakeCodePrologue(CompilationInfo* info, const char* kind); 77 78 // Allocate and install the code. 79 static Handle<Code> MakeCodeEpilogue(MacroAssembler* masm, 80 Code::Flags flags, 81 CompilationInfo* info); 82 83 // Print the code after compiling it. 84 static void PrintCode(Handle<Code> code, CompilationInfo* info); 85 86 static bool RecordPositions(MacroAssembler* masm, 87 int pos, 88 bool right_here = false); 89 90 private: 91 DISALLOW_COPY_AND_ASSIGN(CodeGenerator); 92}; 93 94 95// Results of the library implementation of transcendental functions may differ 96// from the one we use in our generated code. Therefore we use the same 97// generated code both in runtime and compiled code. 98typedef double (*UnaryMathFunction)(double x); 99 100UnaryMathFunction CreateExpFunction(); 101UnaryMathFunction CreateSqrtFunction(); 102 103 104double modulo(double x, double y); 105 106// Custom implementation of math functions. 107double fast_exp(double input); 108double fast_sqrt(double input); 109#ifdef _WIN64 110void init_modulo_function(); 111#endif 112void lazily_initialize_fast_exp(); 113void init_fast_sqrt_function(); 114 115 116class ElementsTransitionGenerator : public AllStatic { 117 public: 118 // If |mode| is set to DONT_TRACK_ALLOCATION_SITE, 119 // |allocation_memento_found| may be NULL. 120 static void GenerateMapChangeElementsTransition( 121 MacroAssembler* masm, 122 Register receiver, 123 Register key, 124 Register value, 125 Register target_map, 126 AllocationSiteMode mode, 127 Label* allocation_memento_found); 128 static void GenerateSmiToDouble( 129 MacroAssembler* masm, 130 Register receiver, 131 Register key, 132 Register value, 133 Register target_map, 134 AllocationSiteMode mode, 135 Label* fail); 136 static void GenerateDoubleToObject( 137 MacroAssembler* masm, 138 Register receiver, 139 Register key, 140 Register value, 141 Register target_map, 142 AllocationSiteMode mode, 143 Label* fail); 144 145 private: 146 DISALLOW_COPY_AND_ASSIGN(ElementsTransitionGenerator); 147}; 148 149static const int kNumberDictionaryProbes = 4; 150 151 152class CodeAgingHelper { 153 public: 154 CodeAgingHelper(); 155 156 uint32_t young_sequence_length() const { return young_sequence_.length(); } 157 bool IsYoung(byte* candidate) const { 158 return memcmp(candidate, 159 young_sequence_.start(), 160 young_sequence_.length()) == 0; 161 } 162 void CopyYoungSequenceTo(byte* new_buffer) const { 163 CopyBytes(new_buffer, young_sequence_.start(), young_sequence_.length()); 164 } 165 166#ifdef DEBUG 167 bool IsOld(byte* candidate) const; 168#endif 169 170 protected: 171 const EmbeddedVector<byte, kNoCodeAgeSequenceLength> young_sequence_; 172#ifdef DEBUG 173#ifdef V8_TARGET_ARCH_ARM64 174 const EmbeddedVector<byte, kNoCodeAgeSequenceLength> old_sequence_; 175#endif 176#endif 177}; 178 179} } // namespace v8::internal 180 181#endif // V8_CODEGEN_H_ 182