| // Copyright 2012 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef V8_CODE_STUBS_H_ |
| #define V8_CODE_STUBS_H_ |
| |
| #include "src/allocation.h" |
| #include "src/assembler.h" |
| #include "src/codegen.h" |
| #include "src/globals.h" |
| #include "src/macro-assembler.h" |
| #include "src/ostreams.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // List of code stubs used on all platforms. |
| #define CODE_STUB_LIST_ALL_PLATFORMS(V) \ |
| V(CallFunction) \ |
| V(CallConstruct) \ |
| V(BinaryOpIC) \ |
| V(BinaryOpICWithAllocationSite) \ |
| V(BinaryOpWithAllocationSite) \ |
| V(StringAdd) \ |
| V(SubString) \ |
| V(StringCompare) \ |
| V(Compare) \ |
| V(CompareIC) \ |
| V(CompareNilIC) \ |
| V(MathPow) \ |
| V(CallIC) \ |
| V(CallIC_Array) \ |
| V(FunctionPrototype) \ |
| V(RecordWrite) \ |
| V(StoreBufferOverflow) \ |
| V(RegExpExec) \ |
| V(Instanceof) \ |
| V(ConvertToDouble) \ |
| V(WriteInt32ToHeapNumber) \ |
| V(StackCheck) \ |
| V(Interrupt) \ |
| V(FastNewClosure) \ |
| V(FastNewContext) \ |
| V(FastCloneShallowArray) \ |
| V(FastCloneShallowObject) \ |
| V(CreateAllocationSite) \ |
| V(ToBoolean) \ |
| V(ToNumber) \ |
| V(ArgumentsAccess) \ |
| V(RegExpConstructResult) \ |
| V(NumberToString) \ |
| V(DoubleToI) \ |
| V(CEntry) \ |
| V(JSEntry) \ |
| V(LoadElement) \ |
| V(KeyedLoadGeneric) \ |
| V(ArrayNoArgumentConstructor) \ |
| V(ArraySingleArgumentConstructor) \ |
| V(ArrayNArgumentsConstructor) \ |
| V(InternalArrayNoArgumentConstructor) \ |
| V(InternalArraySingleArgumentConstructor) \ |
| V(InternalArrayNArgumentsConstructor) \ |
| V(StoreElement) \ |
| V(DebuggerStatement) \ |
| V(NameDictionaryLookup) \ |
| V(ElementsTransitionAndStore) \ |
| V(TransitionElementsKind) \ |
| V(StoreArrayLiteralElement) \ |
| V(StubFailureTrampoline) \ |
| V(ArrayConstructor) \ |
| V(InternalArrayConstructor) \ |
| V(ProfileEntryHook) \ |
| V(StoreGlobal) \ |
| V(CallApiFunction) \ |
| V(CallApiGetter) \ |
| /* IC Handler stubs */ \ |
| V(LoadField) \ |
| V(StoreField) \ |
| V(LoadConstant) \ |
| V(StringLength) |
| |
| // List of code stubs only used on ARM 32 bits platforms. |
| #if V8_TARGET_ARCH_ARM |
| #define CODE_STUB_LIST_ARM(V) \ |
| V(GetProperty) \ |
| V(SetProperty) \ |
| V(InvokeBuiltin) \ |
| V(DirectCEntry) |
| #else |
| #define CODE_STUB_LIST_ARM(V) |
| #endif |
| |
| // List of code stubs only used on ARM 64 bits platforms. |
| #if V8_TARGET_ARCH_ARM64 |
| #define CODE_STUB_LIST_ARM64(V) \ |
| V(GetProperty) \ |
| V(SetProperty) \ |
| V(InvokeBuiltin) \ |
| V(DirectCEntry) \ |
| V(StoreRegistersState) \ |
| V(RestoreRegistersState) |
| #else |
| #define CODE_STUB_LIST_ARM64(V) |
| #endif |
| |
| // List of code stubs only used on MIPS platforms. |
| #if V8_TARGET_ARCH_MIPS |
| #define CODE_STUB_LIST_MIPS(V) \ |
| V(RegExpCEntry) \ |
| V(DirectCEntry) \ |
| V(StoreRegistersState) \ |
| V(RestoreRegistersState) |
| #elif V8_TARGET_ARCH_MIPS64 |
| #define CODE_STUB_LIST_MIPS(V) \ |
| V(RegExpCEntry) \ |
| V(DirectCEntry) \ |
| V(StoreRegistersState) \ |
| V(RestoreRegistersState) |
| #else |
| #define CODE_STUB_LIST_MIPS(V) |
| #endif |
| |
| // Combined list of code stubs. |
| #define CODE_STUB_LIST(V) \ |
| CODE_STUB_LIST_ALL_PLATFORMS(V) \ |
| CODE_STUB_LIST_ARM(V) \ |
| CODE_STUB_LIST_ARM64(V) \ |
| CODE_STUB_LIST_MIPS(V) |
| |
| // Stub is base classes of all stubs. |
| class CodeStub BASE_EMBEDDED { |
| public: |
| enum Major { |
| UninitializedMajorKey = 0, |
| #define DEF_ENUM(name) name, |
| CODE_STUB_LIST(DEF_ENUM) |
| #undef DEF_ENUM |
| NoCache, // marker for stubs that do custom caching |
| NUMBER_OF_IDS |
| }; |
| |
| // Retrieve the code for the stub. Generate the code if needed. |
| Handle<Code> GetCode(); |
| |
| // Retrieve the code for the stub, make and return a copy of the code. |
| Handle<Code> GetCodeCopy(const Code::FindAndReplacePattern& pattern); |
| |
| static Major MajorKeyFromKey(uint32_t key) { |
| return static_cast<Major>(MajorKeyBits::decode(key)); |
| } |
| static int MinorKeyFromKey(uint32_t key) { |
| return MinorKeyBits::decode(key); |
| } |
| |
| // Gets the major key from a code object that is a code stub or binary op IC. |
| static Major GetMajorKey(Code* code_stub) { |
| return MajorKeyFromKey(code_stub->stub_key()); |
| } |
| |
| static uint32_t NoCacheKey() { return MajorKeyBits::encode(NoCache); } |
| |
| static const char* MajorName(Major major_key, bool allow_unknown_keys); |
| |
| explicit CodeStub(Isolate* isolate) : isolate_(isolate) { } |
| virtual ~CodeStub() {} |
| |
| static void GenerateStubsAheadOfTime(Isolate* isolate); |
| static void GenerateFPStubs(Isolate* isolate); |
| |
| // Some stubs put untagged junk on the stack that cannot be scanned by the |
| // GC. This means that we must be statically sure that no GC can occur while |
| // they are running. If that is the case they should override this to return |
| // true, which will cause an assertion if we try to call something that can |
| // GC or if we try to put a stack frame on top of the junk, which would not |
| // result in a traversable stack. |
| virtual bool SometimesSetsUpAFrame() { return true; } |
| |
| // Lookup the code in the (possibly custom) cache. |
| bool FindCodeInCache(Code** code_out); |
| |
| // Returns information for computing the number key. |
| virtual Major MajorKey() const = 0; |
| virtual int MinorKey() const = 0; |
| |
| virtual InlineCacheState GetICState() const { return UNINITIALIZED; } |
| virtual ExtraICState GetExtraICState() const { return kNoExtraICState; } |
| virtual Code::StubType GetStubType() { |
| return Code::NORMAL; |
| } |
| |
| friend OStream& operator<<(OStream& os, const CodeStub& s) { |
| s.PrintName(os); |
| return os; |
| } |
| |
| Isolate* isolate() const { return isolate_; } |
| |
| protected: |
| // Generates the assembler code for the stub. |
| virtual Handle<Code> GenerateCode() = 0; |
| |
| // Returns whether the code generated for this stub needs to be allocated as |
| // a fixed (non-moveable) code object. |
| virtual bool NeedsImmovableCode() { return false; } |
| |
| virtual void PrintName(OStream& os) const; // NOLINT |
| virtual void PrintBaseName(OStream& os) const; // NOLINT |
| virtual void PrintState(OStream& os) const { ; } // NOLINT |
| |
| // Computes the key based on major and minor. |
| uint32_t GetKey() { |
| DCHECK(static_cast<int>(MajorKey()) < NUMBER_OF_IDS); |
| return MinorKeyBits::encode(MinorKey()) | MajorKeyBits::encode(MajorKey()); |
| } |
| |
| private: |
| // Perform bookkeeping required after code generation when stub code is |
| // initially generated. |
| void RecordCodeGeneration(Handle<Code> code); |
| |
| // Finish the code object after it has been generated. |
| virtual void FinishCode(Handle<Code> code) { } |
| |
| // Activate newly generated stub. Is called after |
| // registering stub in the stub cache. |
| virtual void Activate(Code* code) { } |
| |
| // BinaryOpStub needs to override this. |
| virtual Code::Kind GetCodeKind() const; |
| |
| // Add the code to a specialized cache, specific to an individual |
| // stub type. Please note, this method must add the code object to a |
| // roots object, otherwise we will remove the code during GC. |
| virtual void AddToSpecialCache(Handle<Code> new_object) { } |
| |
| // Find code in a specialized cache, work is delegated to the specific stub. |
| virtual bool FindCodeInSpecialCache(Code** code_out) { |
| return false; |
| } |
| |
| // If a stub uses a special cache override this. |
| virtual bool UseSpecialCache() { return false; } |
| |
| STATIC_ASSERT(NUMBER_OF_IDS < (1 << kStubMajorKeyBits)); |
| class MajorKeyBits: public BitField<uint32_t, 0, kStubMajorKeyBits> {}; |
| class MinorKeyBits: public BitField<uint32_t, |
| kStubMajorKeyBits, kStubMinorKeyBits> {}; // NOLINT |
| |
| friend class BreakPointIterator; |
| |
| Isolate* isolate_; |
| }; |
| |
| |
| class PlatformCodeStub : public CodeStub { |
| public: |
| explicit PlatformCodeStub(Isolate* isolate) : CodeStub(isolate) { } |
| |
| // Retrieve the code for the stub. Generate the code if needed. |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| virtual Code::Kind GetCodeKind() const { return Code::STUB; } |
| |
| protected: |
| // Generates the assembler code for the stub. |
| virtual void Generate(MacroAssembler* masm) = 0; |
| }; |
| |
| |
| enum StubFunctionMode { NOT_JS_FUNCTION_STUB_MODE, JS_FUNCTION_STUB_MODE }; |
| enum HandlerArgumentsMode { DONT_PASS_ARGUMENTS, PASS_ARGUMENTS }; |
| |
| |
| class PlatformInterfaceDescriptor; |
| |
| |
| class InterfaceDescriptor { |
| public: |
| bool IsInitialized() const { return register_param_count_ >= 0; } |
| |
| int GetEnvironmentLength() const { return register_param_count_; } |
| |
| int GetRegisterParameterCount() const { return register_param_count_; } |
| |
| Register GetParameterRegister(int index) const { |
| return register_params_[index]; |
| } |
| |
| Representation GetParameterRepresentation(int index) const { |
| DCHECK(index < register_param_count_); |
| if (register_param_representations_.get() == NULL) { |
| return Representation::Tagged(); |
| } |
| |
| return register_param_representations_[index]; |
| } |
| |
| // "Environment" versions of parameter functions. The first register |
| // parameter (context) is not included. |
| int GetEnvironmentParameterCount() const { |
| return GetEnvironmentLength() - 1; |
| } |
| |
| Register GetEnvironmentParameterRegister(int index) const { |
| return GetParameterRegister(index + 1); |
| } |
| |
| Representation GetEnvironmentParameterRepresentation(int index) const { |
| return GetParameterRepresentation(index + 1); |
| } |
| |
| // Some platforms have extra information to associate with the descriptor. |
| PlatformInterfaceDescriptor* platform_specific_descriptor() const { |
| return platform_specific_descriptor_; |
| } |
| |
| static const Register ContextRegister(); |
| |
| protected: |
| InterfaceDescriptor(); |
| virtual ~InterfaceDescriptor() {} |
| |
| void Initialize(int register_parameter_count, Register* registers, |
| Representation* register_param_representations, |
| PlatformInterfaceDescriptor* platform_descriptor = NULL); |
| |
| private: |
| int register_param_count_; |
| |
| // The Register params are allocated dynamically by the |
| // InterfaceDescriptor, and freed on destruction. This is because static |
| // arrays of Registers cause creation of runtime static initializers |
| // which we don't want. |
| SmartArrayPointer<Register> register_params_; |
| // Specifies Representations for the stub's parameter. Points to an array of |
| // Representations of the same length of the numbers of parameters to the |
| // stub, or if NULL (the default value), Representation of each parameter |
| // assumed to be Tagged(). |
| SmartArrayPointer<Representation> register_param_representations_; |
| |
| PlatformInterfaceDescriptor* platform_specific_descriptor_; |
| |
| DISALLOW_COPY_AND_ASSIGN(InterfaceDescriptor); |
| }; |
| |
| |
| class CodeStubInterfaceDescriptor: public InterfaceDescriptor { |
| public: |
| CodeStubInterfaceDescriptor(); |
| |
| void Initialize(CodeStub::Major major, int register_parameter_count, |
| Register* registers, Address deoptimization_handler = NULL, |
| Representation* register_param_representations = NULL, |
| int hint_stack_parameter_count = -1, |
| StubFunctionMode function_mode = NOT_JS_FUNCTION_STUB_MODE); |
| void Initialize(CodeStub::Major major, int register_parameter_count, |
| Register* registers, Register stack_parameter_count, |
| Address deoptimization_handler = NULL, |
| Representation* register_param_representations = NULL, |
| int hint_stack_parameter_count = -1, |
| StubFunctionMode function_mode = NOT_JS_FUNCTION_STUB_MODE, |
| HandlerArgumentsMode handler_mode = DONT_PASS_ARGUMENTS); |
| |
| void SetMissHandler(ExternalReference handler) { |
| miss_handler_ = handler; |
| has_miss_handler_ = true; |
| // Our miss handler infrastructure doesn't currently support |
| // variable stack parameter counts. |
| DCHECK(!stack_parameter_count_.is_valid()); |
| } |
| |
| ExternalReference miss_handler() const { |
| DCHECK(has_miss_handler_); |
| return miss_handler_; |
| } |
| |
| bool has_miss_handler() const { |
| return has_miss_handler_; |
| } |
| |
| bool IsEnvironmentParameterCountRegister(int index) const { |
| return GetEnvironmentParameterRegister(index).is(stack_parameter_count_); |
| } |
| |
| int GetHandlerParameterCount() const { |
| int params = GetEnvironmentParameterCount(); |
| if (handler_arguments_mode_ == PASS_ARGUMENTS) { |
| params += 1; |
| } |
| return params; |
| } |
| |
| int hint_stack_parameter_count() const { return hint_stack_parameter_count_; } |
| Register stack_parameter_count() const { return stack_parameter_count_; } |
| StubFunctionMode function_mode() const { return function_mode_; } |
| Address deoptimization_handler() const { return deoptimization_handler_; } |
| CodeStub::Major MajorKey() const { return major_; } |
| |
| private: |
| Register stack_parameter_count_; |
| // If hint_stack_parameter_count_ > 0, the code stub can optimize the |
| // return sequence. Default value is -1, which means it is ignored. |
| int hint_stack_parameter_count_; |
| StubFunctionMode function_mode_; |
| |
| Address deoptimization_handler_; |
| HandlerArgumentsMode handler_arguments_mode_; |
| |
| ExternalReference miss_handler_; |
| bool has_miss_handler_; |
| CodeStub::Major major_; |
| }; |
| |
| |
| class CallInterfaceDescriptor: public InterfaceDescriptor { |
| public: |
| CallInterfaceDescriptor() { } |
| |
| // A copy of the passed in registers and param_representations is made |
| // and owned by the CallInterfaceDescriptor. |
| |
| // TODO(mvstanton): Instead of taking parallel arrays register and |
| // param_representations, how about a struct that puts the representation |
| // and register side by side (eg, RegRep(r1, Representation::Tagged()). |
| // The same should go for the CodeStubInterfaceDescriptor class. |
| void Initialize(int register_parameter_count, Register* registers, |
| Representation* param_representations, |
| PlatformInterfaceDescriptor* platform_descriptor = NULL); |
| }; |
| |
| |
| class HydrogenCodeStub : public CodeStub { |
| public: |
| enum InitializationState { |
| UNINITIALIZED, |
| INITIALIZED |
| }; |
| |
| explicit HydrogenCodeStub(Isolate* isolate, |
| InitializationState state = INITIALIZED) |
| : CodeStub(isolate) { |
| is_uninitialized_ = (state == UNINITIALIZED); |
| } |
| |
| virtual Code::Kind GetCodeKind() const { return Code::STUB; } |
| |
| CodeStubInterfaceDescriptor* GetInterfaceDescriptor() { |
| return isolate()->code_stub_interface_descriptor(MajorKey()); |
| } |
| |
| bool IsUninitialized() { return is_uninitialized_; } |
| |
| template<class SubClass> |
| static Handle<Code> GetUninitialized(Isolate* isolate) { |
| SubClass::GenerateAheadOfTime(isolate); |
| return SubClass().GetCode(isolate); |
| } |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor) = 0; |
| |
| // Retrieve the code for the stub. Generate the code if needed. |
| virtual Handle<Code> GenerateCode() = 0; |
| |
| virtual int NotMissMinorKey() const = 0; |
| |
| Handle<Code> GenerateLightweightMissCode(); |
| |
| template<class StateType> |
| void TraceTransition(StateType from, StateType to); |
| |
| private: |
| class MinorKeyBits: public BitField<int, 0, kStubMinorKeyBits - 1> {}; |
| class IsMissBits: public BitField<bool, kStubMinorKeyBits - 1, 1> {}; |
| |
| void GenerateLightweightMiss(MacroAssembler* masm); |
| virtual int MinorKey() const { |
| return IsMissBits::encode(is_uninitialized_) | |
| MinorKeyBits::encode(NotMissMinorKey()); |
| } |
| |
| bool is_uninitialized_; |
| }; |
| |
| |
| // Helper interface to prepare to/restore after making runtime calls. |
| class RuntimeCallHelper { |
| public: |
| virtual ~RuntimeCallHelper() {} |
| |
| virtual void BeforeCall(MacroAssembler* masm) const = 0; |
| |
| virtual void AfterCall(MacroAssembler* masm) const = 0; |
| |
| protected: |
| RuntimeCallHelper() {} |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(RuntimeCallHelper); |
| }; |
| |
| |
| } } // namespace v8::internal |
| |
| #if V8_TARGET_ARCH_IA32 |
| #include "src/ia32/code-stubs-ia32.h" |
| #elif V8_TARGET_ARCH_X64 |
| #include "src/x64/code-stubs-x64.h" |
| #elif V8_TARGET_ARCH_ARM64 |
| #include "src/arm64/code-stubs-arm64.h" |
| #elif V8_TARGET_ARCH_ARM |
| #include "src/arm/code-stubs-arm.h" |
| #elif V8_TARGET_ARCH_MIPS |
| #include "src/mips/code-stubs-mips.h" |
| #elif V8_TARGET_ARCH_MIPS64 |
| #include "src/mips64/code-stubs-mips64.h" |
| #elif V8_TARGET_ARCH_X87 |
| #include "src/x87/code-stubs-x87.h" |
| #else |
| #error Unsupported target architecture. |
| #endif |
| |
| namespace v8 { |
| namespace internal { |
| |
| |
| // RuntimeCallHelper implementation used in stubs: enters/leaves a |
| // newly created internal frame before/after the runtime call. |
| class StubRuntimeCallHelper : public RuntimeCallHelper { |
| public: |
| StubRuntimeCallHelper() {} |
| |
| virtual void BeforeCall(MacroAssembler* masm) const; |
| |
| virtual void AfterCall(MacroAssembler* masm) const; |
| }; |
| |
| |
| // Trivial RuntimeCallHelper implementation. |
| class NopRuntimeCallHelper : public RuntimeCallHelper { |
| public: |
| NopRuntimeCallHelper() {} |
| |
| virtual void BeforeCall(MacroAssembler* masm) const {} |
| |
| virtual void AfterCall(MacroAssembler* masm) const {} |
| }; |
| |
| |
| class ToNumberStub: public HydrogenCodeStub { |
| public: |
| explicit ToNumberStub(Isolate* isolate) : HydrogenCodeStub(isolate) { } |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE; |
| |
| static void InstallDescriptors(Isolate* isolate) { |
| ToNumberStub stub(isolate); |
| stub.InitializeInterfaceDescriptor( |
| isolate->code_stub_interface_descriptor(CodeStub::ToNumber)); |
| } |
| |
| private: |
| Major MajorKey() const { return ToNumber; } |
| int NotMissMinorKey() const { return 0; } |
| }; |
| |
| |
| class NumberToStringStub V8_FINAL : public HydrogenCodeStub { |
| public: |
| explicit NumberToStringStub(Isolate* isolate) : HydrogenCodeStub(isolate) {} |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE; |
| |
| static void InstallDescriptors(Isolate* isolate); |
| |
| // Parameters accessed via CodeStubGraphBuilder::GetParameter() |
| static const int kNumber = 0; |
| |
| private: |
| virtual Major MajorKey() const V8_OVERRIDE { return NumberToString; } |
| virtual int NotMissMinorKey() const V8_OVERRIDE { return 0; } |
| }; |
| |
| |
| class FastNewClosureStub : public HydrogenCodeStub { |
| public: |
| FastNewClosureStub(Isolate* isolate, |
| StrictMode strict_mode, |
| bool is_generator) |
| : HydrogenCodeStub(isolate), |
| strict_mode_(strict_mode), |
| is_generator_(is_generator) { } |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE; |
| |
| static void InstallDescriptors(Isolate* isolate); |
| |
| StrictMode strict_mode() const { return strict_mode_; } |
| bool is_generator() const { return is_generator_; } |
| |
| private: |
| class StrictModeBits: public BitField<bool, 0, 1> {}; |
| class IsGeneratorBits: public BitField<bool, 1, 1> {}; |
| |
| Major MajorKey() const { return FastNewClosure; } |
| int NotMissMinorKey() const { |
| return StrictModeBits::encode(strict_mode_ == STRICT) | |
| IsGeneratorBits::encode(is_generator_); |
| } |
| |
| StrictMode strict_mode_; |
| bool is_generator_; |
| }; |
| |
| |
| class FastNewContextStub V8_FINAL : public HydrogenCodeStub { |
| public: |
| static const int kMaximumSlots = 64; |
| |
| FastNewContextStub(Isolate* isolate, int slots) |
| : HydrogenCodeStub(isolate), slots_(slots) { |
| DCHECK(slots_ > 0 && slots_ <= kMaximumSlots); |
| } |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE; |
| |
| static void InstallDescriptors(Isolate* isolate); |
| |
| int slots() const { return slots_; } |
| |
| virtual Major MajorKey() const V8_OVERRIDE { return FastNewContext; } |
| virtual int NotMissMinorKey() const V8_OVERRIDE { return slots_; } |
| |
| // Parameters accessed via CodeStubGraphBuilder::GetParameter() |
| static const int kFunction = 0; |
| |
| private: |
| int slots_; |
| }; |
| |
| |
| class FastCloneShallowArrayStub : public HydrogenCodeStub { |
| public: |
| FastCloneShallowArrayStub(Isolate* isolate, |
| AllocationSiteMode allocation_site_mode) |
| : HydrogenCodeStub(isolate), |
| allocation_site_mode_(allocation_site_mode) {} |
| |
| AllocationSiteMode allocation_site_mode() const { |
| return allocation_site_mode_; |
| } |
| |
| virtual Handle<Code> GenerateCode(); |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE; |
| |
| static void InstallDescriptors(Isolate* isolate); |
| |
| private: |
| AllocationSiteMode allocation_site_mode_; |
| |
| class AllocationSiteModeBits: public BitField<AllocationSiteMode, 0, 1> {}; |
| // Ensure data fits within available bits. |
| Major MajorKey() const { return FastCloneShallowArray; } |
| int NotMissMinorKey() const { |
| return AllocationSiteModeBits::encode(allocation_site_mode_); |
| } |
| }; |
| |
| |
| class FastCloneShallowObjectStub : public HydrogenCodeStub { |
| public: |
| // Maximum number of properties in copied object. |
| static const int kMaximumClonedProperties = 6; |
| |
| FastCloneShallowObjectStub(Isolate* isolate, int length) |
| : HydrogenCodeStub(isolate), length_(length) { |
| DCHECK_GE(length_, 0); |
| DCHECK_LE(length_, kMaximumClonedProperties); |
| } |
| |
| int length() const { return length_; } |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE; |
| |
| private: |
| int length_; |
| |
| Major MajorKey() const { return FastCloneShallowObject; } |
| int NotMissMinorKey() const { return length_; } |
| |
| DISALLOW_COPY_AND_ASSIGN(FastCloneShallowObjectStub); |
| }; |
| |
| |
| class CreateAllocationSiteStub : public HydrogenCodeStub { |
| public: |
| explicit CreateAllocationSiteStub(Isolate* isolate) |
| : HydrogenCodeStub(isolate) { } |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| static void GenerateAheadOfTime(Isolate* isolate); |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE; |
| |
| private: |
| Major MajorKey() const { return CreateAllocationSite; } |
| int NotMissMinorKey() const { return 0; } |
| |
| DISALLOW_COPY_AND_ASSIGN(CreateAllocationSiteStub); |
| }; |
| |
| |
| class InstanceofStub: public PlatformCodeStub { |
| public: |
| enum Flags { |
| kNoFlags = 0, |
| kArgsInRegisters = 1 << 0, |
| kCallSiteInlineCheck = 1 << 1, |
| kReturnTrueFalseObject = 1 << 2 |
| }; |
| |
| InstanceofStub(Isolate* isolate, Flags flags) |
| : PlatformCodeStub(isolate), flags_(flags) { } |
| |
| static Register left(); |
| static Register right(); |
| |
| void Generate(MacroAssembler* masm); |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor); |
| |
| private: |
| Major MajorKey() const { return Instanceof; } |
| int MinorKey() const { return static_cast<int>(flags_); } |
| |
| bool HasArgsInRegisters() const { |
| return (flags_ & kArgsInRegisters) != 0; |
| } |
| |
| bool HasCallSiteInlineCheck() const { |
| return (flags_ & kCallSiteInlineCheck) != 0; |
| } |
| |
| bool ReturnTrueFalseObject() const { |
| return (flags_ & kReturnTrueFalseObject) != 0; |
| } |
| |
| virtual void PrintName(OStream& os) const V8_OVERRIDE; // NOLINT |
| |
| Flags flags_; |
| }; |
| |
| |
| enum AllocationSiteOverrideMode { |
| DONT_OVERRIDE, |
| DISABLE_ALLOCATION_SITES, |
| LAST_ALLOCATION_SITE_OVERRIDE_MODE = DISABLE_ALLOCATION_SITES |
| }; |
| |
| |
| class ArrayConstructorStub: public PlatformCodeStub { |
| public: |
| enum ArgumentCountKey { ANY, NONE, ONE, MORE_THAN_ONE }; |
| ArrayConstructorStub(Isolate* isolate, int argument_count); |
| explicit ArrayConstructorStub(Isolate* isolate); |
| |
| void Generate(MacroAssembler* masm); |
| |
| private: |
| void GenerateDispatchToArrayStub(MacroAssembler* masm, |
| AllocationSiteOverrideMode mode); |
| virtual void PrintName(OStream& os) const V8_OVERRIDE; // NOLINT |
| |
| virtual CodeStub::Major MajorKey() const { return ArrayConstructor; } |
| virtual int MinorKey() const { return argument_count_; } |
| |
| ArgumentCountKey argument_count_; |
| }; |
| |
| |
| class InternalArrayConstructorStub: public PlatformCodeStub { |
| public: |
| explicit InternalArrayConstructorStub(Isolate* isolate); |
| |
| void Generate(MacroAssembler* masm); |
| |
| private: |
| virtual CodeStub::Major MajorKey() const { return InternalArrayConstructor; } |
| virtual int MinorKey() const { return 0; } |
| |
| void GenerateCase(MacroAssembler* masm, ElementsKind kind); |
| }; |
| |
| |
| class MathPowStub: public PlatformCodeStub { |
| public: |
| enum ExponentType { INTEGER, DOUBLE, TAGGED, ON_STACK }; |
| |
| MathPowStub(Isolate* isolate, ExponentType exponent_type) |
| : PlatformCodeStub(isolate), exponent_type_(exponent_type) { } |
| virtual void Generate(MacroAssembler* masm); |
| |
| private: |
| virtual CodeStub::Major MajorKey() const { return MathPow; } |
| virtual int MinorKey() const { return exponent_type_; } |
| |
| ExponentType exponent_type_; |
| }; |
| |
| |
| class CallICStub: public PlatformCodeStub { |
| public: |
| CallICStub(Isolate* isolate, const CallIC::State& state) |
| : PlatformCodeStub(isolate), state_(state) {} |
| |
| bool CallAsMethod() const { return state_.CallAsMethod(); } |
| |
| int arg_count() const { return state_.arg_count(); } |
| |
| static int ExtractArgcFromMinorKey(int minor_key) { |
| CallIC::State state((ExtraICState) minor_key); |
| return state.arg_count(); |
| } |
| |
| virtual void Generate(MacroAssembler* masm); |
| |
| virtual Code::Kind GetCodeKind() const V8_OVERRIDE { |
| return Code::CALL_IC; |
| } |
| |
| virtual InlineCacheState GetICState() const V8_OVERRIDE { return DEFAULT; } |
| |
| virtual ExtraICState GetExtraICState() const V8_FINAL V8_OVERRIDE { |
| return state_.GetExtraICState(); |
| } |
| |
| protected: |
| virtual int MinorKey() const { return GetExtraICState(); } |
| virtual void PrintState(OStream& os) const V8_OVERRIDE; // NOLINT |
| |
| virtual CodeStub::Major MajorKey() const { return CallIC; } |
| |
| // Code generation helpers. |
| void GenerateMiss(MacroAssembler* masm, IC::UtilityId id); |
| |
| const CallIC::State state_; |
| }; |
| |
| |
| class CallIC_ArrayStub: public CallICStub { |
| public: |
| CallIC_ArrayStub(Isolate* isolate, const CallIC::State& state_in) |
| : CallICStub(isolate, state_in) {} |
| |
| virtual void Generate(MacroAssembler* masm); |
| |
| virtual InlineCacheState GetICState() const V8_FINAL V8_OVERRIDE { |
| return MONOMORPHIC; |
| } |
| |
| protected: |
| virtual void PrintState(OStream& os) const V8_OVERRIDE; // NOLINT |
| |
| virtual CodeStub::Major MajorKey() const { return CallIC_Array; } |
| }; |
| |
| |
| // TODO(verwaest): Translate to hydrogen code stub. |
| class FunctionPrototypeStub : public PlatformCodeStub { |
| public: |
| explicit FunctionPrototypeStub(Isolate* isolate) |
| : PlatformCodeStub(isolate) {} |
| virtual void Generate(MacroAssembler* masm); |
| virtual Code::Kind GetCodeKind() const { return Code::HANDLER; } |
| |
| private: |
| virtual CodeStub::Major MajorKey() const { return FunctionPrototype; } |
| virtual int MinorKey() const { return 0; } |
| }; |
| |
| |
| class HandlerStub : public HydrogenCodeStub { |
| public: |
| virtual Code::Kind GetCodeKind() const { return Code::HANDLER; } |
| virtual ExtraICState GetExtraICState() const { return kind(); } |
| virtual InlineCacheState GetICState() const { return MONOMORPHIC; } |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE; |
| |
| protected: |
| explicit HandlerStub(Isolate* isolate) |
| : HydrogenCodeStub(isolate), bit_field_(0) {} |
| virtual int NotMissMinorKey() const { return bit_field_; } |
| virtual Code::Kind kind() const = 0; |
| int bit_field_; |
| }; |
| |
| |
| class LoadFieldStub: public HandlerStub { |
| public: |
| LoadFieldStub(Isolate* isolate, FieldIndex index) |
| : HandlerStub(isolate), index_(index) { |
| int property_index_key = index_.GetFieldAccessStubKey(); |
| bit_field_ = EncodedLoadFieldByIndexBits::encode(property_index_key); |
| } |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| FieldIndex index() const { return index_; } |
| |
| protected: |
| explicit LoadFieldStub(Isolate* isolate); |
| virtual Code::Kind kind() const { return Code::LOAD_IC; } |
| virtual Code::StubType GetStubType() { return Code::FAST; } |
| |
| private: |
| class EncodedLoadFieldByIndexBits : public BitField<int, 0, 13> {}; |
| virtual CodeStub::Major MajorKey() const { return LoadField; } |
| FieldIndex index_; |
| }; |
| |
| |
| class LoadConstantStub : public HandlerStub { |
| public: |
| LoadConstantStub(Isolate* isolate, int descriptor) : HandlerStub(isolate) { |
| bit_field_ = descriptor; |
| } |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| int descriptor() const { return bit_field_; } |
| |
| protected: |
| explicit LoadConstantStub(Isolate* isolate); |
| virtual Code::Kind kind() const { return Code::LOAD_IC; } |
| virtual Code::StubType GetStubType() { return Code::FAST; } |
| |
| private: |
| virtual CodeStub::Major MajorKey() const { return LoadConstant; } |
| }; |
| |
| |
| class StringLengthStub: public HandlerStub { |
| public: |
| explicit StringLengthStub(Isolate* isolate) : HandlerStub(isolate) {} |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| protected: |
| virtual Code::Kind kind() const { return Code::LOAD_IC; } |
| virtual Code::StubType GetStubType() { return Code::FAST; } |
| |
| private: |
| virtual CodeStub::Major MajorKey() const { return StringLength; } |
| }; |
| |
| |
| class StoreFieldStub : public HandlerStub { |
| public: |
| StoreFieldStub(Isolate* isolate, FieldIndex index, |
| Representation representation) |
| : HandlerStub(isolate), index_(index), representation_(representation) { |
| int property_index_key = index_.GetFieldAccessStubKey(); |
| bit_field_ = EncodedStoreFieldByIndexBits::encode(property_index_key) | |
| RepresentationBits::encode( |
| PropertyDetails::EncodeRepresentation(representation)); |
| } |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| FieldIndex index() const { return index_; } |
| Representation representation() { return representation_; } |
| static void InstallDescriptors(Isolate* isolate); |
| |
| protected: |
| explicit StoreFieldStub(Isolate* isolate); |
| virtual Code::Kind kind() const { return Code::STORE_IC; } |
| virtual Code::StubType GetStubType() { return Code::FAST; } |
| |
| private: |
| class EncodedStoreFieldByIndexBits : public BitField<int, 0, 13> {}; |
| class RepresentationBits : public BitField<int, 13, 4> {}; |
| virtual CodeStub::Major MajorKey() const { return StoreField; } |
| FieldIndex index_; |
| Representation representation_; |
| }; |
| |
| |
| class StoreGlobalStub : public HandlerStub { |
| public: |
| StoreGlobalStub(Isolate* isolate, bool is_constant, bool check_global) |
| : HandlerStub(isolate) { |
| bit_field_ = IsConstantBits::encode(is_constant) | |
| CheckGlobalBits::encode(check_global); |
| } |
| |
| static Handle<HeapObject> global_placeholder(Isolate* isolate) { |
| return isolate->factory()->uninitialized_value(); |
| } |
| |
| Handle<Code> GetCodeCopyFromTemplate(Handle<GlobalObject> global, |
| Handle<PropertyCell> cell) { |
| if (check_global()) { |
| Code::FindAndReplacePattern pattern; |
| pattern.Add(Handle<Map>(global_placeholder(isolate())->map()), global); |
| pattern.Add(isolate()->factory()->meta_map(), Handle<Map>(global->map())); |
| pattern.Add(isolate()->factory()->global_property_cell_map(), cell); |
| return CodeStub::GetCodeCopy(pattern); |
| } else { |
| Code::FindAndReplacePattern pattern; |
| pattern.Add(isolate()->factory()->global_property_cell_map(), cell); |
| return CodeStub::GetCodeCopy(pattern); |
| } |
| } |
| |
| virtual Code::Kind kind() const { return Code::STORE_IC; } |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| bool is_constant() const { |
| return IsConstantBits::decode(bit_field_); |
| } |
| bool check_global() const { |
| return CheckGlobalBits::decode(bit_field_); |
| } |
| void set_is_constant(bool value) { |
| bit_field_ = IsConstantBits::update(bit_field_, value); |
| } |
| |
| Representation representation() { |
| return Representation::FromKind(RepresentationBits::decode(bit_field_)); |
| } |
| void set_representation(Representation r) { |
| bit_field_ = RepresentationBits::update(bit_field_, r.kind()); |
| } |
| |
| private: |
| Major MajorKey() const { return StoreGlobal; } |
| |
| class IsConstantBits: public BitField<bool, 0, 1> {}; |
| class RepresentationBits: public BitField<Representation::Kind, 1, 8> {}; |
| class CheckGlobalBits: public BitField<bool, 9, 1> {}; |
| |
| DISALLOW_COPY_AND_ASSIGN(StoreGlobalStub); |
| }; |
| |
| |
| class CallApiFunctionStub : public PlatformCodeStub { |
| public: |
| CallApiFunctionStub(Isolate* isolate, |
| bool is_store, |
| bool call_data_undefined, |
| int argc) : PlatformCodeStub(isolate) { |
| bit_field_ = |
| IsStoreBits::encode(is_store) | |
| CallDataUndefinedBits::encode(call_data_undefined) | |
| ArgumentBits::encode(argc); |
| DCHECK(!is_store || argc == 1); |
| } |
| |
| private: |
| virtual void Generate(MacroAssembler* masm) V8_OVERRIDE; |
| virtual Major MajorKey() const V8_OVERRIDE { return CallApiFunction; } |
| virtual int MinorKey() const V8_OVERRIDE { return bit_field_; } |
| |
| class IsStoreBits: public BitField<bool, 0, 1> {}; |
| class CallDataUndefinedBits: public BitField<bool, 1, 1> {}; |
| class ArgumentBits: public BitField<int, 2, Code::kArgumentsBits> {}; |
| |
| int bit_field_; |
| |
| DISALLOW_COPY_AND_ASSIGN(CallApiFunctionStub); |
| }; |
| |
| |
| class CallApiGetterStub : public PlatformCodeStub { |
| public: |
| explicit CallApiGetterStub(Isolate* isolate) : PlatformCodeStub(isolate) {} |
| |
| private: |
| virtual void Generate(MacroAssembler* masm) V8_OVERRIDE; |
| virtual Major MajorKey() const V8_OVERRIDE { return CallApiGetter; } |
| virtual int MinorKey() const V8_OVERRIDE { return 0; } |
| |
| DISALLOW_COPY_AND_ASSIGN(CallApiGetterStub); |
| }; |
| |
| |
| class BinaryOpICStub : public HydrogenCodeStub { |
| public: |
| BinaryOpICStub(Isolate* isolate, Token::Value op, |
| OverwriteMode mode = NO_OVERWRITE) |
| : HydrogenCodeStub(isolate, UNINITIALIZED), state_(isolate, op, mode) {} |
| |
| explicit BinaryOpICStub(Isolate* isolate, const BinaryOpIC::State& state) |
| : HydrogenCodeStub(isolate), state_(state) {} |
| |
| static void GenerateAheadOfTime(Isolate* isolate); |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE; |
| |
| static void InstallDescriptors(Isolate* isolate); |
| |
| virtual Code::Kind GetCodeKind() const V8_OVERRIDE { |
| return Code::BINARY_OP_IC; |
| } |
| |
| virtual InlineCacheState GetICState() const V8_FINAL V8_OVERRIDE { |
| return state_.GetICState(); |
| } |
| |
| virtual ExtraICState GetExtraICState() const V8_FINAL V8_OVERRIDE { |
| return state_.GetExtraICState(); |
| } |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| const BinaryOpIC::State& state() const { return state_; } |
| |
| virtual void PrintState(OStream& os) const V8_FINAL V8_OVERRIDE; // NOLINT |
| |
| virtual Major MajorKey() const V8_OVERRIDE { return BinaryOpIC; } |
| virtual int NotMissMinorKey() const V8_FINAL V8_OVERRIDE { |
| return GetExtraICState(); |
| } |
| |
| // Parameters accessed via CodeStubGraphBuilder::GetParameter() |
| static const int kLeft = 0; |
| static const int kRight = 1; |
| |
| private: |
| static void GenerateAheadOfTime(Isolate* isolate, |
| const BinaryOpIC::State& state); |
| |
| BinaryOpIC::State state_; |
| |
| DISALLOW_COPY_AND_ASSIGN(BinaryOpICStub); |
| }; |
| |
| |
| // TODO(bmeurer): Merge this into the BinaryOpICStub once we have proper tail |
| // call support for stubs in Hydrogen. |
| class BinaryOpICWithAllocationSiteStub V8_FINAL : public PlatformCodeStub { |
| public: |
| BinaryOpICWithAllocationSiteStub(Isolate* isolate, |
| const BinaryOpIC::State& state) |
| : PlatformCodeStub(isolate), state_(state) {} |
| |
| static void GenerateAheadOfTime(Isolate* isolate); |
| |
| Handle<Code> GetCodeCopyFromTemplate(Handle<AllocationSite> allocation_site) { |
| Code::FindAndReplacePattern pattern; |
| pattern.Add(isolate()->factory()->undefined_map(), allocation_site); |
| return CodeStub::GetCodeCopy(pattern); |
| } |
| |
| virtual Code::Kind GetCodeKind() const V8_OVERRIDE { |
| return Code::BINARY_OP_IC; |
| } |
| |
| virtual InlineCacheState GetICState() const V8_OVERRIDE { |
| return state_.GetICState(); |
| } |
| |
| virtual ExtraICState GetExtraICState() const V8_OVERRIDE { |
| return state_.GetExtraICState(); |
| } |
| |
| virtual void Generate(MacroAssembler* masm) V8_OVERRIDE; |
| |
| virtual void PrintState(OStream& os) const V8_OVERRIDE; // NOLINT |
| |
| virtual Major MajorKey() const V8_OVERRIDE { |
| return BinaryOpICWithAllocationSite; |
| } |
| virtual int MinorKey() const V8_OVERRIDE { return GetExtraICState(); } |
| |
| private: |
| static void GenerateAheadOfTime(Isolate* isolate, |
| const BinaryOpIC::State& state); |
| |
| BinaryOpIC::State state_; |
| |
| DISALLOW_COPY_AND_ASSIGN(BinaryOpICWithAllocationSiteStub); |
| }; |
| |
| |
| class BinaryOpWithAllocationSiteStub V8_FINAL : public BinaryOpICStub { |
| public: |
| BinaryOpWithAllocationSiteStub(Isolate* isolate, |
| Token::Value op, |
| OverwriteMode mode) |
| : BinaryOpICStub(isolate, op, mode) {} |
| |
| BinaryOpWithAllocationSiteStub(Isolate* isolate, |
| const BinaryOpIC::State& state) |
| : BinaryOpICStub(isolate, state) {} |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE; |
| |
| static void InstallDescriptors(Isolate* isolate); |
| |
| virtual Code::Kind GetCodeKind() const V8_FINAL V8_OVERRIDE { |
| return Code::STUB; |
| } |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| virtual Major MajorKey() const V8_OVERRIDE { |
| return BinaryOpWithAllocationSite; |
| } |
| |
| // Parameters accessed via CodeStubGraphBuilder::GetParameter() |
| static const int kAllocationSite = 0; |
| static const int kLeft = 1; |
| static const int kRight = 2; |
| }; |
| |
| |
| enum StringAddFlags { |
| // Omit both parameter checks. |
| STRING_ADD_CHECK_NONE = 0, |
| // Check left parameter. |
| STRING_ADD_CHECK_LEFT = 1 << 0, |
| // Check right parameter. |
| STRING_ADD_CHECK_RIGHT = 1 << 1, |
| // Check both parameters. |
| STRING_ADD_CHECK_BOTH = STRING_ADD_CHECK_LEFT | STRING_ADD_CHECK_RIGHT |
| }; |
| |
| |
| class StringAddStub V8_FINAL : public HydrogenCodeStub { |
| public: |
| StringAddStub(Isolate* isolate, |
| StringAddFlags flags, |
| PretenureFlag pretenure_flag) |
| : HydrogenCodeStub(isolate), |
| bit_field_(StringAddFlagsBits::encode(flags) | |
| PretenureFlagBits::encode(pretenure_flag)) {} |
| |
| StringAddFlags flags() const { |
| return StringAddFlagsBits::decode(bit_field_); |
| } |
| |
| PretenureFlag pretenure_flag() const { |
| return PretenureFlagBits::decode(bit_field_); |
| } |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE; |
| |
| static void InstallDescriptors(Isolate* isolate); |
| |
| // Parameters accessed via CodeStubGraphBuilder::GetParameter() |
| static const int kLeft = 0; |
| static const int kRight = 1; |
| |
| private: |
| class StringAddFlagsBits: public BitField<StringAddFlags, 0, 2> {}; |
| class PretenureFlagBits: public BitField<PretenureFlag, 2, 1> {}; |
| uint32_t bit_field_; |
| |
| virtual Major MajorKey() const V8_OVERRIDE { return StringAdd; } |
| virtual int NotMissMinorKey() const V8_OVERRIDE { return bit_field_; } |
| |
| virtual void PrintBaseName(OStream& os) const V8_OVERRIDE; // NOLINT |
| |
| DISALLOW_COPY_AND_ASSIGN(StringAddStub); |
| }; |
| |
| |
| class ICCompareStub: public PlatformCodeStub { |
| public: |
| ICCompareStub(Isolate* isolate, |
| Token::Value op, |
| CompareIC::State left, |
| CompareIC::State right, |
| CompareIC::State handler) |
| : PlatformCodeStub(isolate), |
| op_(op), |
| left_(left), |
| right_(right), |
| state_(handler) { |
| DCHECK(Token::IsCompareOp(op)); |
| } |
| |
| virtual void Generate(MacroAssembler* masm); |
| |
| void set_known_map(Handle<Map> map) { known_map_ = map; } |
| |
| static void DecodeKey(uint32_t stub_key, CompareIC::State* left_state, |
| CompareIC::State* right_state, |
| CompareIC::State* handler_state, Token::Value* op); |
| |
| virtual InlineCacheState GetICState() const; |
| |
| private: |
| class OpField: public BitField<int, 0, 3> { }; |
| class LeftStateField: public BitField<int, 3, 4> { }; |
| class RightStateField: public BitField<int, 7, 4> { }; |
| class HandlerStateField: public BitField<int, 11, 4> { }; |
| |
| virtual CodeStub::Major MajorKey() const { return CompareIC; } |
| virtual int MinorKey() const; |
| |
| virtual Code::Kind GetCodeKind() const { return Code::COMPARE_IC; } |
| |
| void GenerateSmis(MacroAssembler* masm); |
| void GenerateNumbers(MacroAssembler* masm); |
| void GenerateInternalizedStrings(MacroAssembler* masm); |
| void GenerateStrings(MacroAssembler* masm); |
| void GenerateUniqueNames(MacroAssembler* masm); |
| void GenerateObjects(MacroAssembler* masm); |
| void GenerateMiss(MacroAssembler* masm); |
| void GenerateKnownObjects(MacroAssembler* masm); |
| void GenerateGeneric(MacroAssembler* masm); |
| |
| bool strict() const { return op_ == Token::EQ_STRICT; } |
| Condition GetCondition() const { return CompareIC::ComputeCondition(op_); } |
| |
| virtual void AddToSpecialCache(Handle<Code> new_object); |
| virtual bool FindCodeInSpecialCache(Code** code_out); |
| virtual bool UseSpecialCache() { return state_ == CompareIC::KNOWN_OBJECT; } |
| |
| Token::Value op_; |
| CompareIC::State left_; |
| CompareIC::State right_; |
| CompareIC::State state_; |
| Handle<Map> known_map_; |
| }; |
| |
| |
| class CompareNilICStub : public HydrogenCodeStub { |
| public: |
| Type* GetType(Zone* zone, Handle<Map> map = Handle<Map>()); |
| Type* GetInputType(Zone* zone, Handle<Map> map); |
| |
| CompareNilICStub(Isolate* isolate, NilValue nil) |
| : HydrogenCodeStub(isolate), nil_value_(nil) { } |
| |
| CompareNilICStub(Isolate* isolate, |
| ExtraICState ic_state, |
| InitializationState init_state = INITIALIZED) |
| : HydrogenCodeStub(isolate, init_state), |
| nil_value_(NilValueField::decode(ic_state)), |
| state_(State(TypesField::decode(ic_state))) { |
| } |
| |
| static Handle<Code> GetUninitialized(Isolate* isolate, |
| NilValue nil) { |
| return CompareNilICStub(isolate, nil, UNINITIALIZED).GetCode(); |
| } |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE; |
| |
| static void InstallDescriptors(Isolate* isolate) { |
| CompareNilICStub compare_stub(isolate, kNullValue, UNINITIALIZED); |
| compare_stub.InitializeInterfaceDescriptor( |
| isolate->code_stub_interface_descriptor(CodeStub::CompareNilIC)); |
| } |
| |
| virtual InlineCacheState GetICState() const { |
| if (state_.Contains(GENERIC)) { |
| return MEGAMORPHIC; |
| } else if (state_.Contains(MONOMORPHIC_MAP)) { |
| return MONOMORPHIC; |
| } else { |
| return PREMONOMORPHIC; |
| } |
| } |
| |
| virtual Code::Kind GetCodeKind() const { return Code::COMPARE_NIL_IC; } |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| virtual ExtraICState GetExtraICState() const { |
| return NilValueField::encode(nil_value_) | |
| TypesField::encode(state_.ToIntegral()); |
| } |
| |
| void UpdateStatus(Handle<Object> object); |
| |
| bool IsMonomorphic() const { return state_.Contains(MONOMORPHIC_MAP); } |
| NilValue GetNilValue() const { return nil_value_; } |
| void ClearState() { state_.RemoveAll(); } |
| |
| virtual void PrintState(OStream& os) const V8_OVERRIDE; // NOLINT |
| virtual void PrintBaseName(OStream& os) const V8_OVERRIDE; // NOLINT |
| |
| private: |
| friend class CompareNilIC; |
| |
| enum CompareNilType { |
| UNDEFINED, |
| NULL_TYPE, |
| MONOMORPHIC_MAP, |
| GENERIC, |
| NUMBER_OF_TYPES |
| }; |
| |
| // At most 6 different types can be distinguished, because the Code object |
| // only has room for a single byte to hold a set and there are two more |
| // boolean flags we need to store. :-P |
| STATIC_ASSERT(NUMBER_OF_TYPES <= 6); |
| |
| class State : public EnumSet<CompareNilType, byte> { |
| public: |
| State() : EnumSet<CompareNilType, byte>(0) { } |
| explicit State(byte bits) : EnumSet<CompareNilType, byte>(bits) { } |
| }; |
| friend OStream& operator<<(OStream& os, const State& s); |
| |
| CompareNilICStub(Isolate* isolate, |
| NilValue nil, |
| InitializationState init_state) |
| : HydrogenCodeStub(isolate, init_state), nil_value_(nil) { } |
| |
| class NilValueField : public BitField<NilValue, 0, 1> {}; |
| class TypesField : public BitField<byte, 1, NUMBER_OF_TYPES> {}; |
| |
| virtual CodeStub::Major MajorKey() const { return CompareNilIC; } |
| virtual int NotMissMinorKey() const { return GetExtraICState(); } |
| |
| NilValue nil_value_; |
| State state_; |
| |
| DISALLOW_COPY_AND_ASSIGN(CompareNilICStub); |
| }; |
| |
| |
| OStream& operator<<(OStream& os, const CompareNilICStub::State& s); |
| |
| |
| class CEntryStub : public PlatformCodeStub { |
| public: |
| CEntryStub(Isolate* isolate, |
| int result_size, |
| SaveFPRegsMode save_doubles = kDontSaveFPRegs) |
| : PlatformCodeStub(isolate), |
| result_size_(result_size), |
| save_doubles_(save_doubles) { } |
| |
| void Generate(MacroAssembler* masm); |
| |
| // The version of this stub that doesn't save doubles is generated ahead of |
| // time, so it's OK to call it from other stubs that can't cope with GC during |
| // their code generation. On machines that always have gp registers (x64) we |
| // can generate both variants ahead of time. |
| static void GenerateAheadOfTime(Isolate* isolate); |
| |
| private: |
| // Number of pointers/values returned. |
| const int result_size_; |
| SaveFPRegsMode save_doubles_; |
| |
| Major MajorKey() const { return CEntry; } |
| int MinorKey() const; |
| |
| bool NeedsImmovableCode(); |
| }; |
| |
| |
| class JSEntryStub : public PlatformCodeStub { |
| public: |
| explicit JSEntryStub(Isolate* isolate) : PlatformCodeStub(isolate) { } |
| |
| void Generate(MacroAssembler* masm) { GenerateBody(masm, false); } |
| |
| protected: |
| void GenerateBody(MacroAssembler* masm, bool is_construct); |
| |
| private: |
| Major MajorKey() const { return JSEntry; } |
| int MinorKey() const { return 0; } |
| |
| virtual void FinishCode(Handle<Code> code); |
| |
| int handler_offset_; |
| }; |
| |
| |
| class JSConstructEntryStub : public JSEntryStub { |
| public: |
| explicit JSConstructEntryStub(Isolate* isolate) : JSEntryStub(isolate) { } |
| |
| void Generate(MacroAssembler* masm) { GenerateBody(masm, true); } |
| |
| private: |
| int MinorKey() const { return 1; } |
| |
| virtual void PrintName(OStream& os) const V8_OVERRIDE { // NOLINT |
| os << "JSConstructEntryStub"; |
| } |
| }; |
| |
| |
| class ArgumentsAccessStub: public PlatformCodeStub { |
| public: |
| enum Type { |
| READ_ELEMENT, |
| NEW_SLOPPY_FAST, |
| NEW_SLOPPY_SLOW, |
| NEW_STRICT |
| }; |
| |
| ArgumentsAccessStub(Isolate* isolate, Type type) |
| : PlatformCodeStub(isolate), type_(type) { } |
| |
| private: |
| Type type_; |
| |
| Major MajorKey() const { return ArgumentsAccess; } |
| int MinorKey() const { return type_; } |
| |
| void Generate(MacroAssembler* masm); |
| void GenerateReadElement(MacroAssembler* masm); |
| void GenerateNewStrict(MacroAssembler* masm); |
| void GenerateNewSloppyFast(MacroAssembler* masm); |
| void GenerateNewSloppySlow(MacroAssembler* masm); |
| |
| virtual void PrintName(OStream& os) const V8_OVERRIDE; // NOLINT |
| }; |
| |
| |
| class RegExpExecStub: public PlatformCodeStub { |
| public: |
| explicit RegExpExecStub(Isolate* isolate) : PlatformCodeStub(isolate) { } |
| |
| private: |
| Major MajorKey() const { return RegExpExec; } |
| int MinorKey() const { return 0; } |
| |
| void Generate(MacroAssembler* masm); |
| }; |
| |
| |
| class RegExpConstructResultStub V8_FINAL : public HydrogenCodeStub { |
| public: |
| explicit RegExpConstructResultStub(Isolate* isolate) |
| : HydrogenCodeStub(isolate) { } |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE; |
| |
| virtual Major MajorKey() const V8_OVERRIDE { return RegExpConstructResult; } |
| virtual int NotMissMinorKey() const V8_OVERRIDE { return 0; } |
| |
| static void InstallDescriptors(Isolate* isolate); |
| |
| // Parameters accessed via CodeStubGraphBuilder::GetParameter() |
| static const int kLength = 0; |
| static const int kIndex = 1; |
| static const int kInput = 2; |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(RegExpConstructResultStub); |
| }; |
| |
| |
| class CallFunctionStub: public PlatformCodeStub { |
| public: |
| CallFunctionStub(Isolate* isolate, int argc, CallFunctionFlags flags) |
| : PlatformCodeStub(isolate), argc_(argc), flags_(flags) { |
| DCHECK(argc <= Code::kMaxArguments); |
| } |
| |
| void Generate(MacroAssembler* masm); |
| |
| static int ExtractArgcFromMinorKey(int minor_key) { |
| return ArgcBits::decode(minor_key); |
| } |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor); |
| |
| private: |
| int argc_; |
| CallFunctionFlags flags_; |
| |
| virtual void PrintName(OStream& os) const V8_OVERRIDE; // NOLINT |
| |
| // Minor key encoding in 32 bits with Bitfield <Type, shift, size>. |
| class FlagBits: public BitField<CallFunctionFlags, 0, 2> {}; |
| class ArgcBits : public BitField<unsigned, 2, Code::kArgumentsBits> {}; |
| |
| STATIC_ASSERT(Code::kArgumentsBits + 2 <= kStubMinorKeyBits); |
| |
| Major MajorKey() const { return CallFunction; } |
| int MinorKey() const { |
| // Encode the parameters in a unique 32 bit value. |
| return FlagBits::encode(flags_) | ArgcBits::encode(argc_); |
| } |
| |
| bool CallAsMethod() { |
| return flags_ == CALL_AS_METHOD || flags_ == WRAP_AND_CALL; |
| } |
| |
| bool NeedsChecks() { |
| return flags_ != WRAP_AND_CALL; |
| } |
| }; |
| |
| |
| class CallConstructStub: public PlatformCodeStub { |
| public: |
| CallConstructStub(Isolate* isolate, CallConstructorFlags flags) |
| : PlatformCodeStub(isolate), flags_(flags) {} |
| |
| void Generate(MacroAssembler* masm); |
| |
| virtual void FinishCode(Handle<Code> code) { |
| code->set_has_function_cache(RecordCallTarget()); |
| } |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor); |
| |
| private: |
| CallConstructorFlags flags_; |
| |
| virtual void PrintName(OStream& os) const V8_OVERRIDE; // NOLINT |
| |
| Major MajorKey() const { return CallConstruct; } |
| int MinorKey() const { return flags_; } |
| |
| bool RecordCallTarget() const { |
| return (flags_ & RECORD_CONSTRUCTOR_TARGET) != 0; |
| } |
| }; |
| |
| |
| enum StringIndexFlags { |
| // Accepts smis or heap numbers. |
| STRING_INDEX_IS_NUMBER, |
| |
| // Accepts smis or heap numbers that are valid array indices |
| // (ECMA-262 15.4). Invalid indices are reported as being out of |
| // range. |
| STRING_INDEX_IS_ARRAY_INDEX |
| }; |
| |
| |
| // Generates code implementing String.prototype.charCodeAt. |
| // |
| // Only supports the case when the receiver is a string and the index |
| // is a number (smi or heap number) that is a valid index into the |
| // string. Additional index constraints are specified by the |
| // flags. Otherwise, bails out to the provided labels. |
| // |
| // Register usage: |object| may be changed to another string in a way |
| // that doesn't affect charCodeAt/charAt semantics, |index| is |
| // preserved, |scratch| and |result| are clobbered. |
| class StringCharCodeAtGenerator { |
| public: |
| StringCharCodeAtGenerator(Register object, |
| Register index, |
| Register result, |
| Label* receiver_not_string, |
| Label* index_not_number, |
| Label* index_out_of_range, |
| StringIndexFlags index_flags) |
| : object_(object), |
| index_(index), |
| result_(result), |
| receiver_not_string_(receiver_not_string), |
| index_not_number_(index_not_number), |
| index_out_of_range_(index_out_of_range), |
| index_flags_(index_flags) { |
| DCHECK(!result_.is(object_)); |
| DCHECK(!result_.is(index_)); |
| } |
| |
| // Generates the fast case code. On the fallthrough path |result| |
| // register contains the result. |
| void GenerateFast(MacroAssembler* masm); |
| |
| // Generates the slow case code. Must not be naturally |
| // reachable. Expected to be put after a ret instruction (e.g., in |
| // deferred code). Always jumps back to the fast case. |
| void GenerateSlow(MacroAssembler* masm, |
| const RuntimeCallHelper& call_helper); |
| |
| // Skip handling slow case and directly jump to bailout. |
| void SkipSlow(MacroAssembler* masm, Label* bailout) { |
| masm->bind(&index_not_smi_); |
| masm->bind(&call_runtime_); |
| masm->jmp(bailout); |
| } |
| |
| private: |
| Register object_; |
| Register index_; |
| Register result_; |
| |
| Label* receiver_not_string_; |
| Label* index_not_number_; |
| Label* index_out_of_range_; |
| |
| StringIndexFlags index_flags_; |
| |
| Label call_runtime_; |
| Label index_not_smi_; |
| Label got_smi_index_; |
| Label exit_; |
| |
| DISALLOW_COPY_AND_ASSIGN(StringCharCodeAtGenerator); |
| }; |
| |
| |
| // Generates code for creating a one-char string from a char code. |
| class StringCharFromCodeGenerator { |
| public: |
| StringCharFromCodeGenerator(Register code, |
| Register result) |
| : code_(code), |
| result_(result) { |
| DCHECK(!code_.is(result_)); |
| } |
| |
| // Generates the fast case code. On the fallthrough path |result| |
| // register contains the result. |
| void GenerateFast(MacroAssembler* masm); |
| |
| // Generates the slow case code. Must not be naturally |
| // reachable. Expected to be put after a ret instruction (e.g., in |
| // deferred code). Always jumps back to the fast case. |
| void GenerateSlow(MacroAssembler* masm, |
| const RuntimeCallHelper& call_helper); |
| |
| // Skip handling slow case and directly jump to bailout. |
| void SkipSlow(MacroAssembler* masm, Label* bailout) { |
| masm->bind(&slow_case_); |
| masm->jmp(bailout); |
| } |
| |
| private: |
| Register code_; |
| Register result_; |
| |
| Label slow_case_; |
| Label exit_; |
| |
| DISALLOW_COPY_AND_ASSIGN(StringCharFromCodeGenerator); |
| }; |
| |
| |
| // Generates code implementing String.prototype.charAt. |
| // |
| // Only supports the case when the receiver is a string and the index |
| // is a number (smi or heap number) that is a valid index into the |
| // string. Additional index constraints are specified by the |
| // flags. Otherwise, bails out to the provided labels. |
| // |
| // Register usage: |object| may be changed to another string in a way |
| // that doesn't affect charCodeAt/charAt semantics, |index| is |
| // preserved, |scratch1|, |scratch2|, and |result| are clobbered. |
| class StringCharAtGenerator { |
| public: |
| StringCharAtGenerator(Register object, |
| Register index, |
| Register scratch, |
| Register result, |
| Label* receiver_not_string, |
| Label* index_not_number, |
| Label* index_out_of_range, |
| StringIndexFlags index_flags) |
| : char_code_at_generator_(object, |
| index, |
| scratch, |
| receiver_not_string, |
| index_not_number, |
| index_out_of_range, |
| index_flags), |
| char_from_code_generator_(scratch, result) {} |
| |
| // Generates the fast case code. On the fallthrough path |result| |
| // register contains the result. |
| void GenerateFast(MacroAssembler* masm) { |
| char_code_at_generator_.GenerateFast(masm); |
| char_from_code_generator_.GenerateFast(masm); |
| } |
| |
| // Generates the slow case code. Must not be naturally |
| // reachable. Expected to be put after a ret instruction (e.g., in |
| // deferred code). Always jumps back to the fast case. |
| void GenerateSlow(MacroAssembler* masm, |
| const RuntimeCallHelper& call_helper) { |
| char_code_at_generator_.GenerateSlow(masm, call_helper); |
| char_from_code_generator_.GenerateSlow(masm, call_helper); |
| } |
| |
| // Skip handling slow case and directly jump to bailout. |
| void SkipSlow(MacroAssembler* masm, Label* bailout) { |
| char_code_at_generator_.SkipSlow(masm, bailout); |
| char_from_code_generator_.SkipSlow(masm, bailout); |
| } |
| |
| private: |
| StringCharCodeAtGenerator char_code_at_generator_; |
| StringCharFromCodeGenerator char_from_code_generator_; |
| |
| DISALLOW_COPY_AND_ASSIGN(StringCharAtGenerator); |
| }; |
| |
| |
| class LoadDictionaryElementStub : public HydrogenCodeStub { |
| public: |
| explicit LoadDictionaryElementStub(Isolate* isolate) |
| : HydrogenCodeStub(isolate) {} |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE; |
| |
| private: |
| Major MajorKey() const { return LoadElement; } |
| int NotMissMinorKey() const { return DICTIONARY_ELEMENTS; } |
| |
| DISALLOW_COPY_AND_ASSIGN(LoadDictionaryElementStub); |
| }; |
| |
| |
| class LoadDictionaryElementPlatformStub : public PlatformCodeStub { |
| public: |
| explicit LoadDictionaryElementPlatformStub(Isolate* isolate) |
| : PlatformCodeStub(isolate) {} |
| |
| void Generate(MacroAssembler* masm); |
| |
| private: |
| Major MajorKey() const { return LoadElement; } |
| int MinorKey() const { return DICTIONARY_ELEMENTS; } |
| |
| DISALLOW_COPY_AND_ASSIGN(LoadDictionaryElementPlatformStub); |
| }; |
| |
| |
| class KeyedLoadGenericStub : public HydrogenCodeStub { |
| public: |
| explicit KeyedLoadGenericStub(Isolate* isolate) : HydrogenCodeStub(isolate) {} |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE; |
| |
| static void InstallDescriptors(Isolate* isolate); |
| |
| virtual Code::Kind GetCodeKind() const { return Code::KEYED_LOAD_IC; } |
| virtual InlineCacheState GetICState() const { return GENERIC; } |
| |
| private: |
| Major MajorKey() const { return KeyedLoadGeneric; } |
| int NotMissMinorKey() const { return 0; } |
| |
| DISALLOW_COPY_AND_ASSIGN(KeyedLoadGenericStub); |
| }; |
| |
| |
| class DoubleToIStub : public PlatformCodeStub { |
| public: |
| DoubleToIStub(Isolate* isolate, |
| Register source, |
| Register destination, |
| int offset, |
| bool is_truncating, |
| bool skip_fastpath = false) |
| : PlatformCodeStub(isolate), bit_field_(0) { |
| bit_field_ = SourceRegisterBits::encode(source.code()) | |
| DestinationRegisterBits::encode(destination.code()) | |
| OffsetBits::encode(offset) | |
| IsTruncatingBits::encode(is_truncating) | |
| SkipFastPathBits::encode(skip_fastpath) | |
| SSE3Bits::encode(CpuFeatures::IsSupported(SSE3) ? 1 : 0); |
| } |
| |
| Register source() { |
| return Register::from_code(SourceRegisterBits::decode(bit_field_)); |
| } |
| |
| Register destination() { |
| return Register::from_code(DestinationRegisterBits::decode(bit_field_)); |
| } |
| |
| bool is_truncating() { |
| return IsTruncatingBits::decode(bit_field_); |
| } |
| |
| bool skip_fastpath() { |
| return SkipFastPathBits::decode(bit_field_); |
| } |
| |
| int offset() { |
| return OffsetBits::decode(bit_field_); |
| } |
| |
| void Generate(MacroAssembler* masm); |
| |
| virtual bool SometimesSetsUpAFrame() { return false; } |
| |
| private: |
| static const int kBitsPerRegisterNumber = 6; |
| STATIC_ASSERT((1L << kBitsPerRegisterNumber) >= Register::kNumRegisters); |
| class SourceRegisterBits: |
| public BitField<int, 0, kBitsPerRegisterNumber> {}; // NOLINT |
| class DestinationRegisterBits: |
| public BitField<int, kBitsPerRegisterNumber, |
| kBitsPerRegisterNumber> {}; // NOLINT |
| class IsTruncatingBits: |
| public BitField<bool, 2 * kBitsPerRegisterNumber, 1> {}; // NOLINT |
| class OffsetBits: |
| public BitField<int, 2 * kBitsPerRegisterNumber + 1, 3> {}; // NOLINT |
| class SkipFastPathBits: |
| public BitField<int, 2 * kBitsPerRegisterNumber + 4, 1> {}; // NOLINT |
| class SSE3Bits: |
| public BitField<int, 2 * kBitsPerRegisterNumber + 5, 1> {}; // NOLINT |
| |
| Major MajorKey() const { return DoubleToI; } |
| int MinorKey() const { return bit_field_; } |
| |
| int bit_field_; |
| |
| DISALLOW_COPY_AND_ASSIGN(DoubleToIStub); |
| }; |
| |
| |
| class LoadFastElementStub : public HydrogenCodeStub { |
| public: |
| LoadFastElementStub(Isolate* isolate, bool is_js_array, |
| ElementsKind elements_kind) |
| : HydrogenCodeStub(isolate) { |
| bit_field_ = ElementsKindBits::encode(elements_kind) | |
| IsJSArrayBits::encode(is_js_array); |
| } |
| |
| bool is_js_array() const { |
| return IsJSArrayBits::decode(bit_field_); |
| } |
| |
| ElementsKind elements_kind() const { |
| return ElementsKindBits::decode(bit_field_); |
| } |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE; |
| |
| private: |
| class ElementsKindBits: public BitField<ElementsKind, 0, 8> {}; |
| class IsJSArrayBits: public BitField<bool, 8, 1> {}; |
| uint32_t bit_field_; |
| |
| Major MajorKey() const { return LoadElement; } |
| int NotMissMinorKey() const { return bit_field_; } |
| |
| DISALLOW_COPY_AND_ASSIGN(LoadFastElementStub); |
| }; |
| |
| |
| class StoreFastElementStub : public HydrogenCodeStub { |
| public: |
| StoreFastElementStub(Isolate* isolate, bool is_js_array, |
| ElementsKind elements_kind, KeyedAccessStoreMode mode) |
| : HydrogenCodeStub(isolate) { |
| bit_field_ = ElementsKindBits::encode(elements_kind) | |
| IsJSArrayBits::encode(is_js_array) | |
| StoreModeBits::encode(mode); |
| } |
| |
| bool is_js_array() const { |
| return IsJSArrayBits::decode(bit_field_); |
| } |
| |
| ElementsKind elements_kind() const { |
| return ElementsKindBits::decode(bit_field_); |
| } |
| |
| KeyedAccessStoreMode store_mode() const { |
| return StoreModeBits::decode(bit_field_); |
| } |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE; |
| |
| private: |
| class ElementsKindBits: public BitField<ElementsKind, 0, 8> {}; |
| class StoreModeBits: public BitField<KeyedAccessStoreMode, 8, 4> {}; |
| class IsJSArrayBits: public BitField<bool, 12, 1> {}; |
| uint32_t bit_field_; |
| |
| Major MajorKey() const { return StoreElement; } |
| int NotMissMinorKey() const { return bit_field_; } |
| |
| DISALLOW_COPY_AND_ASSIGN(StoreFastElementStub); |
| }; |
| |
| |
| class TransitionElementsKindStub : public HydrogenCodeStub { |
| public: |
| TransitionElementsKindStub(Isolate* isolate, |
| ElementsKind from_kind, |
| ElementsKind to_kind, |
| bool is_js_array) : HydrogenCodeStub(isolate) { |
| bit_field_ = FromKindBits::encode(from_kind) | |
| ToKindBits::encode(to_kind) | |
| IsJSArrayBits::encode(is_js_array); |
| } |
| |
| ElementsKind from_kind() const { |
| return FromKindBits::decode(bit_field_); |
| } |
| |
| ElementsKind to_kind() const { |
| return ToKindBits::decode(bit_field_); |
| } |
| |
| bool is_js_array() const { |
| return IsJSArrayBits::decode(bit_field_); |
| } |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE; |
| |
| private: |
| class FromKindBits: public BitField<ElementsKind, 8, 8> {}; |
| class ToKindBits: public BitField<ElementsKind, 0, 8> {}; |
| class IsJSArrayBits: public BitField<bool, 16, 1> {}; |
| uint32_t bit_field_; |
| |
| Major MajorKey() const { return TransitionElementsKind; } |
| int NotMissMinorKey() const { return bit_field_; } |
| |
| DISALLOW_COPY_AND_ASSIGN(TransitionElementsKindStub); |
| }; |
| |
| |
| class ArrayConstructorStubBase : public HydrogenCodeStub { |
| public: |
| ArrayConstructorStubBase(Isolate* isolate, |
| ElementsKind kind, |
| AllocationSiteOverrideMode override_mode) |
| : HydrogenCodeStub(isolate) { |
| // It only makes sense to override local allocation site behavior |
| // if there is a difference between the global allocation site policy |
| // for an ElementsKind and the desired usage of the stub. |
| DCHECK(override_mode != DISABLE_ALLOCATION_SITES || |
| AllocationSite::GetMode(kind) == TRACK_ALLOCATION_SITE); |
| bit_field_ = ElementsKindBits::encode(kind) | |
| AllocationSiteOverrideModeBits::encode(override_mode); |
| } |
| |
| ElementsKind elements_kind() const { |
| return ElementsKindBits::decode(bit_field_); |
| } |
| |
| AllocationSiteOverrideMode override_mode() const { |
| return AllocationSiteOverrideModeBits::decode(bit_field_); |
| } |
| |
| static void GenerateStubsAheadOfTime(Isolate* isolate); |
| static void InstallDescriptors(Isolate* isolate); |
| |
| // Parameters accessed via CodeStubGraphBuilder::GetParameter() |
| static const int kConstructor = 0; |
| static const int kAllocationSite = 1; |
| |
| protected: |
| OStream& BasePrintName(OStream& os, const char* name) const; // NOLINT |
| |
| private: |
| int NotMissMinorKey() const { return bit_field_; } |
| |
| // Ensure data fits within available bits. |
| STATIC_ASSERT(LAST_ALLOCATION_SITE_OVERRIDE_MODE == 1); |
| |
| class ElementsKindBits: public BitField<ElementsKind, 0, 8> {}; |
| class AllocationSiteOverrideModeBits: public |
| BitField<AllocationSiteOverrideMode, 8, 1> {}; // NOLINT |
| uint32_t bit_field_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ArrayConstructorStubBase); |
| }; |
| |
| |
| class ArrayNoArgumentConstructorStub : public ArrayConstructorStubBase { |
| public: |
| ArrayNoArgumentConstructorStub( |
| Isolate* isolate, |
| ElementsKind kind, |
| AllocationSiteOverrideMode override_mode = DONT_OVERRIDE) |
| : ArrayConstructorStubBase(isolate, kind, override_mode) { |
| } |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE; |
| |
| private: |
| Major MajorKey() const { return ArrayNoArgumentConstructor; } |
| |
| virtual void PrintName(OStream& os) const V8_OVERRIDE { // NOLINT |
| BasePrintName(os, "ArrayNoArgumentConstructorStub"); |
| } |
| |
| DISALLOW_COPY_AND_ASSIGN(ArrayNoArgumentConstructorStub); |
| }; |
| |
| |
| class ArraySingleArgumentConstructorStub : public ArrayConstructorStubBase { |
| public: |
| ArraySingleArgumentConstructorStub( |
| Isolate* isolate, |
| ElementsKind kind, |
| AllocationSiteOverrideMode override_mode = DONT_OVERRIDE) |
| : ArrayConstructorStubBase(isolate, kind, override_mode) { |
| } |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE; |
| |
| private: |
| Major MajorKey() const { return ArraySingleArgumentConstructor; } |
| |
| virtual void PrintName(OStream& os) const { // NOLINT |
| BasePrintName(os, "ArraySingleArgumentConstructorStub"); |
| } |
| |
| DISALLOW_COPY_AND_ASSIGN(ArraySingleArgumentConstructorStub); |
| }; |
| |
| |
| class ArrayNArgumentsConstructorStub : public ArrayConstructorStubBase { |
| public: |
| ArrayNArgumentsConstructorStub( |
| Isolate* isolate, |
| ElementsKind kind, |
| AllocationSiteOverrideMode override_mode = DONT_OVERRIDE) |
| : ArrayConstructorStubBase(isolate, kind, override_mode) { |
| } |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE; |
| |
| private: |
| Major MajorKey() const { return ArrayNArgumentsConstructor; } |
| |
| virtual void PrintName(OStream& os) const { // NOLINT |
| BasePrintName(os, "ArrayNArgumentsConstructorStub"); |
| } |
| |
| DISALLOW_COPY_AND_ASSIGN(ArrayNArgumentsConstructorStub); |
| }; |
| |
| |
| class InternalArrayConstructorStubBase : public HydrogenCodeStub { |
| public: |
| InternalArrayConstructorStubBase(Isolate* isolate, ElementsKind kind) |
| : HydrogenCodeStub(isolate) { |
| kind_ = kind; |
| } |
| |
| static void GenerateStubsAheadOfTime(Isolate* isolate); |
| static void InstallDescriptors(Isolate* isolate); |
| |
| // Parameters accessed via CodeStubGraphBuilder::GetParameter() |
| static const int kConstructor = 0; |
| |
| ElementsKind elements_kind() const { return kind_; } |
| |
| private: |
| int NotMissMinorKey() const { return kind_; } |
| |
| ElementsKind kind_; |
| |
| DISALLOW_COPY_AND_ASSIGN(InternalArrayConstructorStubBase); |
| }; |
| |
| |
| class InternalArrayNoArgumentConstructorStub : public |
| InternalArrayConstructorStubBase { |
| public: |
| InternalArrayNoArgumentConstructorStub(Isolate* isolate, |
| ElementsKind kind) |
| : InternalArrayConstructorStubBase(isolate, kind) { } |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE; |
| |
| private: |
| Major MajorKey() const { return InternalArrayNoArgumentConstructor; } |
| |
| DISALLOW_COPY_AND_ASSIGN(InternalArrayNoArgumentConstructorStub); |
| }; |
| |
| |
| class InternalArraySingleArgumentConstructorStub : public |
| InternalArrayConstructorStubBase { |
| public: |
| InternalArraySingleArgumentConstructorStub(Isolate* isolate, |
| ElementsKind kind) |
| : InternalArrayConstructorStubBase(isolate, kind) { } |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE; |
| |
| private: |
| Major MajorKey() const { return InternalArraySingleArgumentConstructor; } |
| |
| DISALLOW_COPY_AND_ASSIGN(InternalArraySingleArgumentConstructorStub); |
| }; |
| |
| |
| class InternalArrayNArgumentsConstructorStub : public |
| InternalArrayConstructorStubBase { |
| public: |
| InternalArrayNArgumentsConstructorStub(Isolate* isolate, ElementsKind kind) |
| : InternalArrayConstructorStubBase(isolate, kind) { } |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE; |
| |
| private: |
| Major MajorKey() const { return InternalArrayNArgumentsConstructor; } |
| |
| DISALLOW_COPY_AND_ASSIGN(InternalArrayNArgumentsConstructorStub); |
| }; |
| |
| |
| class StoreElementStub : public PlatformCodeStub { |
| public: |
| StoreElementStub(Isolate* isolate, bool is_js_array, |
| ElementsKind elements_kind, KeyedAccessStoreMode store_mode) |
| : PlatformCodeStub(isolate), |
| is_js_array_(is_js_array), |
| elements_kind_(elements_kind), |
| store_mode_(store_mode) {} |
| |
| Major MajorKey() const { return StoreElement; } |
| int MinorKey() const { |
| return ElementsKindBits::encode(elements_kind_) | |
| IsJSArrayBits::encode(is_js_array_) | |
| StoreModeBits::encode(store_mode_); |
| } |
| |
| void Generate(MacroAssembler* masm); |
| |
| private: |
| class ElementsKindBits: public BitField<ElementsKind, 0, 8> {}; |
| class StoreModeBits: public BitField<KeyedAccessStoreMode, 8, 4> {}; |
| class IsJSArrayBits: public BitField<bool, 12, 1> {}; |
| |
| bool is_js_array_; |
| ElementsKind elements_kind_; |
| KeyedAccessStoreMode store_mode_; |
| |
| DISALLOW_COPY_AND_ASSIGN(StoreElementStub); |
| }; |
| |
| |
| class ToBooleanStub: public HydrogenCodeStub { |
| public: |
| enum Type { |
| UNDEFINED, |
| BOOLEAN, |
| NULL_TYPE, |
| SMI, |
| SPEC_OBJECT, |
| STRING, |
| SYMBOL, |
| HEAP_NUMBER, |
| NUMBER_OF_TYPES |
| }; |
| |
| enum ResultMode { |
| RESULT_AS_SMI, // For Smi(1) on truthy value, Smi(0) otherwise. |
| RESULT_AS_ODDBALL, // For {true} on truthy value, {false} otherwise. |
| RESULT_AS_INVERSE_ODDBALL // For {false} on truthy value, {true} otherwise. |
| }; |
| |
| // At most 8 different types can be distinguished, because the Code object |
| // only has room for a single byte to hold a set of these types. :-P |
| STATIC_ASSERT(NUMBER_OF_TYPES <= 8); |
| |
| class Types : public EnumSet<Type, byte> { |
| public: |
| Types() : EnumSet<Type, byte>(0) {} |
| explicit Types(byte bits) : EnumSet<Type, byte>(bits) {} |
| |
| byte ToByte() const { return ToIntegral(); } |
| bool UpdateStatus(Handle<Object> object); |
| bool NeedsMap() const; |
| bool CanBeUndetectable() const; |
| bool IsGeneric() const { return ToIntegral() == Generic().ToIntegral(); } |
| |
| static Types Generic() { return Types((1 << NUMBER_OF_TYPES) - 1); } |
| }; |
| |
| ToBooleanStub(Isolate* isolate, ResultMode mode, Types types = Types()) |
| : HydrogenCodeStub(isolate), types_(types), mode_(mode) {} |
| ToBooleanStub(Isolate* isolate, ExtraICState state) |
| : HydrogenCodeStub(isolate), |
| types_(static_cast<byte>(state)), |
| mode_(RESULT_AS_SMI) {} |
| |
| bool UpdateStatus(Handle<Object> object); |
| Types GetTypes() { return types_; } |
| ResultMode GetMode() { return mode_; } |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE; |
| |
| virtual Code::Kind GetCodeKind() const { return Code::TO_BOOLEAN_IC; } |
| virtual void PrintState(OStream& os) const V8_OVERRIDE; // NOLINT |
| |
| virtual bool SometimesSetsUpAFrame() { return false; } |
| |
| static void InstallDescriptors(Isolate* isolate) { |
| ToBooleanStub stub(isolate, RESULT_AS_SMI); |
| stub.InitializeInterfaceDescriptor( |
| isolate->code_stub_interface_descriptor(CodeStub::ToBoolean)); |
| } |
| |
| static Handle<Code> GetUninitialized(Isolate* isolate) { |
| return ToBooleanStub(isolate, UNINITIALIZED).GetCode(); |
| } |
| |
| virtual ExtraICState GetExtraICState() const { return types_.ToIntegral(); } |
| |
| virtual InlineCacheState GetICState() const { |
| if (types_.IsEmpty()) { |
| return ::v8::internal::UNINITIALIZED; |
| } else { |
| return MONOMORPHIC; |
| } |
| } |
| |
| private: |
| class TypesBits : public BitField<byte, 0, NUMBER_OF_TYPES> {}; |
| class ResultModeBits : public BitField<ResultMode, NUMBER_OF_TYPES, 2> {}; |
| |
| Major MajorKey() const { return ToBoolean; } |
| int NotMissMinorKey() const { |
| return TypesBits::encode(types_.ToByte()) | ResultModeBits::encode(mode_); |
| } |
| |
| ToBooleanStub(Isolate* isolate, InitializationState init_state) |
| : HydrogenCodeStub(isolate, init_state), mode_(RESULT_AS_SMI) {} |
| |
| Types types_; |
| ResultMode mode_; |
| }; |
| |
| |
| OStream& operator<<(OStream& os, const ToBooleanStub::Types& t); |
| |
| |
| class ElementsTransitionAndStoreStub : public HydrogenCodeStub { |
| public: |
| ElementsTransitionAndStoreStub(Isolate* isolate, |
| ElementsKind from_kind, |
| ElementsKind to_kind, |
| bool is_jsarray, |
| KeyedAccessStoreMode store_mode) |
| : HydrogenCodeStub(isolate), |
| from_kind_(from_kind), |
| to_kind_(to_kind), |
| is_jsarray_(is_jsarray), |
| store_mode_(store_mode) {} |
| |
| ElementsKind from_kind() const { return from_kind_; } |
| ElementsKind to_kind() const { return to_kind_; } |
| bool is_jsarray() const { return is_jsarray_; } |
| KeyedAccessStoreMode store_mode() const { return store_mode_; } |
| |
| virtual Handle<Code> GenerateCode() V8_OVERRIDE; |
| |
| virtual void InitializeInterfaceDescriptor( |
| CodeStubInterfaceDescriptor* descriptor) V8_OVERRIDE; |
| |
| // Parameters accessed via CodeStubGraphBuilder::GetParameter() |
| enum ParameterIndices { |
| kValueIndex, |
| kMapIndex, |
| kKeyIndex, |
| kObjectIndex, |
| kParameterCount |
| }; |
| |
| static const Register ValueRegister() { |
| return KeyedStoreIC::ValueRegister(); |
| } |
| static const Register MapRegister() { return KeyedStoreIC::MapRegister(); } |
| static const Register KeyRegister() { return KeyedStoreIC::NameRegister(); } |
| static const Register ObjectRegister() { |
| return KeyedStoreIC::ReceiverRegister(); |
| } |
| |
| private: |
| class FromBits: public BitField<ElementsKind, 0, 8> {}; |
| class ToBits: public BitField<ElementsKind, 8, 8> {}; |
| class IsJSArrayBits: public BitField<bool, 16, 1> {}; |
| class StoreModeBits: public BitField<KeyedAccessStoreMode, 17, 4> {}; |
| |
| Major MajorKey() const { return ElementsTransitionAndStore; } |
| int NotMissMinorKey() const { |
| return FromBits::encode(from_kind_) | |
| ToBits::encode(to_kind_) | |
| IsJSArrayBits::encode(is_jsarray_) | |
| StoreModeBits::encode(store_mode_); |
| } |
| |
| ElementsKind from_kind_; |
| ElementsKind to_kind_; |
| bool is_jsarray_; |
| KeyedAccessStoreMode store_mode_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ElementsTransitionAndStoreStub); |
| }; |
| |
| |
| class StoreArrayLiteralElementStub : public PlatformCodeStub { |
| public: |
| explicit StoreArrayLiteralElementStub(Isolate* isolate) |
| : PlatformCodeStub(isolate) { } |
| |
| private: |
| Major MajorKey() const { return StoreArrayLiteralElement; } |
| int MinorKey() const { return 0; } |
| |
| void Generate(MacroAssembler* masm); |
| |
| DISALLOW_COPY_AND_ASSIGN(StoreArrayLiteralElementStub); |
| }; |
| |
| |
| class StubFailureTrampolineStub : public PlatformCodeStub { |
| public: |
| StubFailureTrampolineStub(Isolate* isolate, StubFunctionMode function_mode) |
| : PlatformCodeStub(isolate), |
| function_mode_(function_mode) {} |
| |
| static void GenerateAheadOfTime(Isolate* isolate); |
| |
| private: |
| class FunctionModeField: public BitField<StubFunctionMode, 0, 1> {}; |
| |
| Major MajorKey() const { return StubFailureTrampoline; } |
| int MinorKey() const { return FunctionModeField::encode(function_mode_); } |
| |
| void Generate(MacroAssembler* masm); |
| |
| StubFunctionMode function_mode_; |
| |
| DISALLOW_COPY_AND_ASSIGN(StubFailureTrampolineStub); |
| }; |
| |
| |
| class ProfileEntryHookStub : public PlatformCodeStub { |
| public: |
| explicit ProfileEntryHookStub(Isolate* isolate) : PlatformCodeStub(isolate) {} |
| |
| // The profile entry hook function is not allowed to cause a GC. |
| virtual bool SometimesSetsUpAFrame() { return false; } |
| |
| // Generates a call to the entry hook if it's enabled. |
| static void MaybeCallEntryHook(MacroAssembler* masm); |
| |
| private: |
| static void EntryHookTrampoline(intptr_t function, |
| intptr_t stack_pointer, |
| Isolate* isolate); |
| |
| Major MajorKey() const { return ProfileEntryHook; } |
| int MinorKey() const { return 0; } |
| |
| void Generate(MacroAssembler* masm); |
| |
| DISALLOW_COPY_AND_ASSIGN(ProfileEntryHookStub); |
| }; |
| |
| |
| class CallDescriptors { |
| public: |
| static void InitializeForIsolate(Isolate* isolate); |
| }; |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_CODE_STUBS_H_ |