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" 50#elif V8_TARGET_ARCH_X64 51#include "src/x64/codegen-x64.h" 52#elif V8_TARGET_ARCH_ARM64 53#include "src/arm64/codegen-arm64.h" 54#elif V8_TARGET_ARCH_ARM 55#include "src/arm/codegen-arm.h" 56#elif V8_TARGET_ARCH_MIPS 57#include "src/mips/codegen-mips.h" 58#elif V8_TARGET_ARCH_X87 59#include "src/x87/codegen-x87.h" 60#else 61#error Unsupported target architecture. 62#endif 63 64namespace v8 { 65namespace internal { 66 67 68class CompilationInfo; 69 70 71class CodeGenerator { 72 public: 73 // Printing of AST, etc. as requested by flags. 74 static void MakeCodePrologue(CompilationInfo* info, const char* kind); 75 76 // Allocate and install the code. 77 static Handle<Code> MakeCodeEpilogue(MacroAssembler* masm, 78 Code::Flags flags, 79 CompilationInfo* info); 80 81 // Print the code after compiling it. 82 static void PrintCode(Handle<Code> code, CompilationInfo* info); 83 84 static bool RecordPositions(MacroAssembler* masm, 85 int pos, 86 bool right_here = false); 87 88 private: 89 DISALLOW_COPY_AND_ASSIGN(CodeGenerator); 90}; 91 92 93// Results of the library implementation of transcendental functions may differ 94// from the one we use in our generated code. Therefore we use the same 95// generated code both in runtime and compiled code. 96typedef double (*UnaryMathFunction)(double x); 97 98UnaryMathFunction CreateExpFunction(); 99UnaryMathFunction CreateSqrtFunction(); 100 101 102double modulo(double x, double y); 103 104// Custom implementation of math functions. 105double fast_exp(double input); 106double fast_sqrt(double input); 107#ifdef _WIN64 108void init_modulo_function(); 109#endif 110void lazily_initialize_fast_exp(); 111void init_fast_sqrt_function(); 112 113 114class ElementsTransitionGenerator : public AllStatic { 115 public: 116 // If |mode| is set to DONT_TRACK_ALLOCATION_SITE, 117 // |allocation_memento_found| may be NULL. 118 static void GenerateMapChangeElementsTransition(MacroAssembler* masm, 119 AllocationSiteMode mode, 120 Label* allocation_memento_found); 121 static void GenerateSmiToDouble(MacroAssembler* masm, 122 AllocationSiteMode mode, 123 Label* fail); 124 static void GenerateDoubleToObject(MacroAssembler* masm, 125 AllocationSiteMode mode, 126 Label* fail); 127 128 private: 129 DISALLOW_COPY_AND_ASSIGN(ElementsTransitionGenerator); 130}; 131 132static const int kNumberDictionaryProbes = 4; 133 134 135class CodeAgingHelper { 136 public: 137 CodeAgingHelper(); 138 139 uint32_t young_sequence_length() const { return young_sequence_.length(); } 140 bool IsYoung(byte* candidate) const { 141 return memcmp(candidate, 142 young_sequence_.start(), 143 young_sequence_.length()) == 0; 144 } 145 void CopyYoungSequenceTo(byte* new_buffer) const { 146 CopyBytes(new_buffer, young_sequence_.start(), young_sequence_.length()); 147 } 148 149#ifdef DEBUG 150 bool IsOld(byte* candidate) const; 151#endif 152 153 protected: 154 const EmbeddedVector<byte, kNoCodeAgeSequenceLength> young_sequence_; 155#ifdef DEBUG 156#ifdef V8_TARGET_ARCH_ARM64 157 const EmbeddedVector<byte, kNoCodeAgeSequenceLength> old_sequence_; 158#endif 159#endif 160}; 161 162} } // namespace v8::internal 163 164#endif // V8_CODEGEN_H_ 165