| // Copyright 2015 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_INTERPRETER_BYTECODES_H_ |
| #define V8_INTERPRETER_BYTECODES_H_ |
| |
| #include <iosfwd> |
| |
| // Clients of this interface shouldn't depend on lots of interpreter internals. |
| // Do not include anything from src/interpreter here! |
| #include "src/frames.h" |
| #include "src/utils.h" |
| |
| namespace v8 { |
| namespace internal { |
| namespace interpreter { |
| |
| #define INVALID_OPERAND_TYPE_LIST(V) V(None, OperandTypeInfo::kNone) |
| |
| #define REGISTER_INPUT_OPERAND_TYPE_LIST(V) \ |
| V(MaybeReg, OperandTypeInfo::kScalableSignedByte) \ |
| V(Reg, OperandTypeInfo::kScalableSignedByte) \ |
| V(RegPair, OperandTypeInfo::kScalableSignedByte) |
| |
| #define REGISTER_OUTPUT_OPERAND_TYPE_LIST(V) \ |
| V(RegOut, OperandTypeInfo::kScalableSignedByte) \ |
| V(RegOutPair, OperandTypeInfo::kScalableSignedByte) \ |
| V(RegOutTriple, OperandTypeInfo::kScalableSignedByte) |
| |
| #define SCALAR_OPERAND_TYPE_LIST(V) \ |
| V(Flag8, OperandTypeInfo::kFixedUnsignedByte) \ |
| V(Idx, OperandTypeInfo::kScalableUnsignedByte) \ |
| V(Imm, OperandTypeInfo::kScalableSignedByte) \ |
| V(RegCount, OperandTypeInfo::kScalableUnsignedByte) \ |
| V(RuntimeId, OperandTypeInfo::kFixedUnsignedShort) |
| |
| #define REGISTER_OPERAND_TYPE_LIST(V) \ |
| REGISTER_INPUT_OPERAND_TYPE_LIST(V) \ |
| REGISTER_OUTPUT_OPERAND_TYPE_LIST(V) |
| |
| #define NON_REGISTER_OPERAND_TYPE_LIST(V) \ |
| INVALID_OPERAND_TYPE_LIST(V) \ |
| SCALAR_OPERAND_TYPE_LIST(V) |
| |
| // The list of operand types used by bytecodes. |
| #define OPERAND_TYPE_LIST(V) \ |
| NON_REGISTER_OPERAND_TYPE_LIST(V) \ |
| REGISTER_OPERAND_TYPE_LIST(V) |
| |
| // Define one debug break bytecode for each possible size of unscaled |
| // bytecodes. Format is V(<bytecode>, <accumulator_use>, <operands>). |
| #define DEBUG_BREAK_PLAIN_BYTECODE_LIST(V) \ |
| V(DebugBreak0, AccumulatorUse::kRead) \ |
| V(DebugBreak1, AccumulatorUse::kRead, OperandType::kReg) \ |
| V(DebugBreak2, AccumulatorUse::kRead, OperandType::kReg, OperandType::kReg) \ |
| V(DebugBreak3, AccumulatorUse::kRead, OperandType::kReg, OperandType::kReg, \ |
| OperandType::kReg) \ |
| V(DebugBreak4, AccumulatorUse::kRead, OperandType::kReg, OperandType::kReg, \ |
| OperandType::kReg, OperandType::kReg) \ |
| V(DebugBreak5, AccumulatorUse::kRead, OperandType::kRuntimeId, \ |
| OperandType::kReg, OperandType::kReg) \ |
| V(DebugBreak6, AccumulatorUse::kRead, OperandType::kRuntimeId, \ |
| OperandType::kReg, OperandType::kReg, OperandType::kReg) |
| |
| // Define one debug break for each widening prefix. |
| #define DEBUG_BREAK_PREFIX_BYTECODE_LIST(V) \ |
| V(DebugBreakWide, AccumulatorUse::kRead) \ |
| V(DebugBreakExtraWide, AccumulatorUse::kRead) |
| |
| #define DEBUG_BREAK_BYTECODE_LIST(V) \ |
| DEBUG_BREAK_PLAIN_BYTECODE_LIST(V) \ |
| DEBUG_BREAK_PREFIX_BYTECODE_LIST(V) |
| |
| // The list of bytecodes which are interpreted by the interpreter. |
| #define BYTECODE_LIST(V) \ |
| /* Extended width operands */ \ |
| V(Wide, AccumulatorUse::kNone) \ |
| V(ExtraWide, AccumulatorUse::kNone) \ |
| \ |
| /* Loading the accumulator */ \ |
| V(LdaZero, AccumulatorUse::kWrite) \ |
| V(LdaSmi, AccumulatorUse::kWrite, OperandType::kImm) \ |
| V(LdaUndefined, AccumulatorUse::kWrite) \ |
| V(LdaNull, AccumulatorUse::kWrite) \ |
| V(LdaTheHole, AccumulatorUse::kWrite) \ |
| V(LdaTrue, AccumulatorUse::kWrite) \ |
| V(LdaFalse, AccumulatorUse::kWrite) \ |
| V(LdaConstant, AccumulatorUse::kWrite, OperandType::kIdx) \ |
| \ |
| /* Globals */ \ |
| V(LdaGlobal, AccumulatorUse::kWrite, OperandType::kIdx, OperandType::kIdx) \ |
| V(LdaGlobalInsideTypeof, AccumulatorUse::kWrite, OperandType::kIdx, \ |
| OperandType::kIdx) \ |
| V(StaGlobalSloppy, AccumulatorUse::kRead, OperandType::kIdx, \ |
| OperandType::kIdx) \ |
| V(StaGlobalStrict, AccumulatorUse::kRead, OperandType::kIdx, \ |
| OperandType::kIdx) \ |
| \ |
| /* Context operations */ \ |
| V(PushContext, AccumulatorUse::kRead, OperandType::kRegOut) \ |
| V(PopContext, AccumulatorUse::kNone, OperandType::kReg) \ |
| V(LdaContextSlot, AccumulatorUse::kWrite, OperandType::kReg, \ |
| OperandType::kIdx) \ |
| V(StaContextSlot, AccumulatorUse::kRead, OperandType::kReg, \ |
| OperandType::kIdx) \ |
| \ |
| /* Load-Store lookup slots */ \ |
| V(LdaLookupSlot, AccumulatorUse::kWrite, OperandType::kIdx) \ |
| V(LdaLookupSlotInsideTypeof, AccumulatorUse::kWrite, OperandType::kIdx) \ |
| V(StaLookupSlotSloppy, AccumulatorUse::kReadWrite, OperandType::kIdx) \ |
| V(StaLookupSlotStrict, AccumulatorUse::kReadWrite, OperandType::kIdx) \ |
| \ |
| /* Register-accumulator transfers */ \ |
| V(Ldar, AccumulatorUse::kWrite, OperandType::kReg) \ |
| V(Star, AccumulatorUse::kRead, OperandType::kRegOut) \ |
| \ |
| /* Register-register transfers */ \ |
| V(Mov, AccumulatorUse::kNone, OperandType::kReg, OperandType::kRegOut) \ |
| \ |
| /* LoadIC operations */ \ |
| V(LoadIC, AccumulatorUse::kWrite, OperandType::kReg, OperandType::kIdx, \ |
| OperandType::kIdx) \ |
| V(KeyedLoadIC, AccumulatorUse::kReadWrite, OperandType::kReg, \ |
| OperandType::kIdx) \ |
| \ |
| /* StoreIC operations */ \ |
| V(StoreICSloppy, AccumulatorUse::kRead, OperandType::kReg, \ |
| OperandType::kIdx, OperandType::kIdx) \ |
| V(StoreICStrict, AccumulatorUse::kRead, OperandType::kReg, \ |
| OperandType::kIdx, OperandType::kIdx) \ |
| V(KeyedStoreICSloppy, AccumulatorUse::kRead, OperandType::kReg, \ |
| OperandType::kReg, OperandType::kIdx) \ |
| V(KeyedStoreICStrict, AccumulatorUse::kRead, OperandType::kReg, \ |
| OperandType::kReg, OperandType::kIdx) \ |
| \ |
| /* Binary Operators */ \ |
| V(Add, AccumulatorUse::kReadWrite, OperandType::kReg) \ |
| V(Sub, AccumulatorUse::kReadWrite, OperandType::kReg) \ |
| V(Mul, AccumulatorUse::kReadWrite, OperandType::kReg) \ |
| V(Div, AccumulatorUse::kReadWrite, OperandType::kReg) \ |
| V(Mod, AccumulatorUse::kReadWrite, OperandType::kReg) \ |
| V(BitwiseOr, AccumulatorUse::kReadWrite, OperandType::kReg) \ |
| V(BitwiseXor, AccumulatorUse::kReadWrite, OperandType::kReg) \ |
| V(BitwiseAnd, AccumulatorUse::kReadWrite, OperandType::kReg) \ |
| V(ShiftLeft, AccumulatorUse::kReadWrite, OperandType::kReg) \ |
| V(ShiftRight, AccumulatorUse::kReadWrite, OperandType::kReg) \ |
| V(ShiftRightLogical, AccumulatorUse::kReadWrite, OperandType::kReg) \ |
| \ |
| /* Unary Operators */ \ |
| V(Inc, AccumulatorUse::kReadWrite) \ |
| V(Dec, AccumulatorUse::kReadWrite) \ |
| V(ToBooleanLogicalNot, AccumulatorUse::kReadWrite) \ |
| V(LogicalNot, AccumulatorUse::kReadWrite) \ |
| V(TypeOf, AccumulatorUse::kReadWrite) \ |
| V(DeletePropertyStrict, AccumulatorUse::kReadWrite, OperandType::kReg) \ |
| V(DeletePropertySloppy, AccumulatorUse::kReadWrite, OperandType::kReg) \ |
| \ |
| /* Call operations */ \ |
| V(Call, AccumulatorUse::kWrite, OperandType::kReg, OperandType::kReg, \ |
| OperandType::kRegCount, OperandType::kIdx) \ |
| V(TailCall, AccumulatorUse::kWrite, OperandType::kReg, OperandType::kReg, \ |
| OperandType::kRegCount, OperandType::kIdx) \ |
| V(CallRuntime, AccumulatorUse::kWrite, OperandType::kRuntimeId, \ |
| OperandType::kMaybeReg, OperandType::kRegCount) \ |
| V(CallRuntimeForPair, AccumulatorUse::kNone, OperandType::kRuntimeId, \ |
| OperandType::kMaybeReg, OperandType::kRegCount, OperandType::kRegOutPair) \ |
| V(CallJSRuntime, AccumulatorUse::kWrite, OperandType::kIdx, \ |
| OperandType::kReg, OperandType::kRegCount) \ |
| \ |
| /* Intrinsics */ \ |
| V(InvokeIntrinsic, AccumulatorUse::kWrite, OperandType::kRuntimeId, \ |
| OperandType::kMaybeReg, OperandType::kRegCount) \ |
| \ |
| /* New operator */ \ |
| V(New, AccumulatorUse::kReadWrite, OperandType::kReg, \ |
| OperandType::kMaybeReg, OperandType::kRegCount) \ |
| \ |
| /* Test Operators */ \ |
| V(TestEqual, AccumulatorUse::kReadWrite, OperandType::kReg) \ |
| V(TestNotEqual, AccumulatorUse::kReadWrite, OperandType::kReg) \ |
| V(TestEqualStrict, AccumulatorUse::kReadWrite, OperandType::kReg) \ |
| V(TestLessThan, AccumulatorUse::kReadWrite, OperandType::kReg) \ |
| V(TestGreaterThan, AccumulatorUse::kReadWrite, OperandType::kReg) \ |
| V(TestLessThanOrEqual, AccumulatorUse::kReadWrite, OperandType::kReg) \ |
| V(TestGreaterThanOrEqual, AccumulatorUse::kReadWrite, OperandType::kReg) \ |
| V(TestInstanceOf, AccumulatorUse::kReadWrite, OperandType::kReg) \ |
| V(TestIn, AccumulatorUse::kReadWrite, OperandType::kReg) \ |
| \ |
| /* Cast operators */ \ |
| V(ToName, AccumulatorUse::kReadWrite) \ |
| V(ToNumber, AccumulatorUse::kReadWrite) \ |
| V(ToObject, AccumulatorUse::kReadWrite) \ |
| \ |
| /* Literals */ \ |
| V(CreateRegExpLiteral, AccumulatorUse::kWrite, OperandType::kIdx, \ |
| OperandType::kIdx, OperandType::kFlag8) \ |
| V(CreateArrayLiteral, AccumulatorUse::kWrite, OperandType::kIdx, \ |
| OperandType::kIdx, OperandType::kFlag8) \ |
| V(CreateObjectLiteral, AccumulatorUse::kWrite, OperandType::kIdx, \ |
| OperandType::kIdx, OperandType::kFlag8) \ |
| \ |
| /* Closure allocation */ \ |
| V(CreateClosure, AccumulatorUse::kWrite, OperandType::kIdx, \ |
| OperandType::kFlag8) \ |
| \ |
| /* Arguments allocation */ \ |
| V(CreateMappedArguments, AccumulatorUse::kWrite) \ |
| V(CreateUnmappedArguments, AccumulatorUse::kWrite) \ |
| V(CreateRestParameter, AccumulatorUse::kWrite) \ |
| \ |
| /* Control Flow */ \ |
| V(Jump, AccumulatorUse::kNone, OperandType::kImm) \ |
| V(JumpConstant, AccumulatorUse::kNone, OperandType::kIdx) \ |
| V(JumpIfTrue, AccumulatorUse::kRead, OperandType::kImm) \ |
| V(JumpIfTrueConstant, AccumulatorUse::kRead, OperandType::kIdx) \ |
| V(JumpIfFalse, AccumulatorUse::kRead, OperandType::kImm) \ |
| V(JumpIfFalseConstant, AccumulatorUse::kRead, OperandType::kIdx) \ |
| V(JumpIfToBooleanTrue, AccumulatorUse::kRead, OperandType::kImm) \ |
| V(JumpIfToBooleanTrueConstant, AccumulatorUse::kRead, OperandType::kIdx) \ |
| V(JumpIfToBooleanFalse, AccumulatorUse::kRead, OperandType::kImm) \ |
| V(JumpIfToBooleanFalseConstant, AccumulatorUse::kRead, OperandType::kIdx) \ |
| V(JumpIfNull, AccumulatorUse::kRead, OperandType::kImm) \ |
| V(JumpIfNullConstant, AccumulatorUse::kRead, OperandType::kIdx) \ |
| V(JumpIfUndefined, AccumulatorUse::kRead, OperandType::kImm) \ |
| V(JumpIfUndefinedConstant, AccumulatorUse::kRead, OperandType::kIdx) \ |
| V(JumpIfNotHole, AccumulatorUse::kRead, OperandType::kImm) \ |
| V(JumpIfNotHoleConstant, AccumulatorUse::kRead, OperandType::kIdx) \ |
| \ |
| /* Complex flow control For..in */ \ |
| V(ForInPrepare, AccumulatorUse::kRead, OperandType::kRegOutTriple) \ |
| V(ForInDone, AccumulatorUse::kWrite, OperandType::kReg, OperandType::kReg) \ |
| V(ForInNext, AccumulatorUse::kWrite, OperandType::kReg, OperandType::kReg, \ |
| OperandType::kRegPair, OperandType::kIdx) \ |
| V(ForInStep, AccumulatorUse::kWrite, OperandType::kReg) \ |
| \ |
| /* Perform a stack guard check */ \ |
| V(StackCheck, AccumulatorUse::kNone) \ |
| \ |
| /* Non-local flow control */ \ |
| V(Throw, AccumulatorUse::kRead) \ |
| V(ReThrow, AccumulatorUse::kRead) \ |
| V(Return, AccumulatorUse::kRead) \ |
| \ |
| /* Generators */ \ |
| V(SuspendGenerator, AccumulatorUse::kRead, OperandType::kReg) \ |
| V(ResumeGenerator, AccumulatorUse::kWrite, OperandType::kReg) \ |
| \ |
| /* Debugger */ \ |
| V(Debugger, AccumulatorUse::kNone) \ |
| DEBUG_BREAK_BYTECODE_LIST(V) \ |
| \ |
| /* Illegal bytecode (terminates execution) */ \ |
| V(Illegal, AccumulatorUse::kNone) \ |
| \ |
| /* No operation (used to maintain source positions for peephole */ \ |
| /* eliminated bytecodes). */ \ |
| V(Nop, AccumulatorUse::kNone) |
| |
| enum class AccumulatorUse : uint8_t { |
| kNone = 0, |
| kRead = 1 << 0, |
| kWrite = 1 << 1, |
| kReadWrite = kRead | kWrite |
| }; |
| |
| V8_INLINE AccumulatorUse operator&(AccumulatorUse lhs, AccumulatorUse rhs) { |
| int result = static_cast<int>(lhs) & static_cast<int>(rhs); |
| return static_cast<AccumulatorUse>(result); |
| } |
| |
| V8_INLINE AccumulatorUse operator|(AccumulatorUse lhs, AccumulatorUse rhs) { |
| int result = static_cast<int>(lhs) | static_cast<int>(rhs); |
| return static_cast<AccumulatorUse>(result); |
| } |
| |
| // Enumeration of scaling factors applicable to scalable operands. Code |
| // relies on being able to cast values to integer scaling values. |
| #define OPERAND_SCALE_LIST(V) \ |
| V(Single, 1) \ |
| V(Double, 2) \ |
| V(Quadruple, 4) |
| |
| enum class OperandScale : uint8_t { |
| #define DECLARE_OPERAND_SCALE(Name, Scale) k##Name = Scale, |
| OPERAND_SCALE_LIST(DECLARE_OPERAND_SCALE) |
| #undef DECLARE_OPERAND_SCALE |
| kLast = kQuadruple |
| }; |
| |
| // Enumeration of the size classes of operand types used by |
| // bytecodes. Code relies on being able to cast values to integer |
| // types to get the size in bytes. |
| enum class OperandSize : uint8_t { |
| kNone = 0, |
| kByte = 1, |
| kShort = 2, |
| kQuad = 4, |
| kLast = kQuad |
| }; |
| |
| // Primitive operand info used that summarize properties of operands. |
| // Columns are Name, IsScalable, IsUnsigned, UnscaledSize. |
| #define OPERAND_TYPE_INFO_LIST(V) \ |
| V(None, false, false, OperandSize::kNone) \ |
| V(ScalableSignedByte, true, false, OperandSize::kByte) \ |
| V(ScalableUnsignedByte, true, true, OperandSize::kByte) \ |
| V(FixedUnsignedByte, false, true, OperandSize::kByte) \ |
| V(FixedUnsignedShort, false, true, OperandSize::kShort) |
| |
| enum class OperandTypeInfo : uint8_t { |
| #define DECLARE_OPERAND_TYPE_INFO(Name, ...) k##Name, |
| OPERAND_TYPE_INFO_LIST(DECLARE_OPERAND_TYPE_INFO) |
| #undef DECLARE_OPERAND_TYPE_INFO |
| }; |
| |
| // Enumeration of operand types used by bytecodes. |
| enum class OperandType : uint8_t { |
| #define DECLARE_OPERAND_TYPE(Name, _) k##Name, |
| OPERAND_TYPE_LIST(DECLARE_OPERAND_TYPE) |
| #undef DECLARE_OPERAND_TYPE |
| #define COUNT_OPERAND_TYPES(x, _) +1 |
| // The COUNT_OPERAND macro will turn this into kLast = -1 +1 +1... which will |
| // evaluate to the same value as the last operand. |
| kLast = -1 OPERAND_TYPE_LIST(COUNT_OPERAND_TYPES) |
| #undef COUNT_OPERAND_TYPES |
| }; |
| |
| |
| // Enumeration of interpreter bytecodes. |
| enum class Bytecode : uint8_t { |
| #define DECLARE_BYTECODE(Name, ...) k##Name, |
| BYTECODE_LIST(DECLARE_BYTECODE) |
| #undef DECLARE_BYTECODE |
| #define COUNT_BYTECODE(x, ...) +1 |
| // The COUNT_BYTECODE macro will turn this into kLast = -1 +1 +1... which will |
| // evaluate to the same value as the last real bytecode. |
| kLast = -1 BYTECODE_LIST(COUNT_BYTECODE) |
| #undef COUNT_BYTECODE |
| }; |
| |
| |
| // An interpreter Register which is located in the function's Register file |
| // in its stack-frame. Register hold parameters, this, and expression values. |
| class Register final { |
| public: |
| explicit Register(int index = kInvalidIndex) : index_(index) {} |
| |
| int index() const { return index_; } |
| bool is_parameter() const { return index() < 0; } |
| bool is_valid() const { return index_ != kInvalidIndex; } |
| |
| static Register FromParameterIndex(int index, int parameter_count); |
| int ToParameterIndex(int parameter_count) const; |
| |
| // Returns an invalid register. |
| static Register invalid_value() { return Register(); } |
| |
| // Returns the register for the function's closure object. |
| static Register function_closure(); |
| bool is_function_closure() const; |
| |
| // Returns the register which holds the current context object. |
| static Register current_context(); |
| bool is_current_context() const; |
| |
| // Returns the register for the incoming new target value. |
| static Register new_target(); |
| bool is_new_target() const; |
| |
| // Returns the register for the bytecode array. |
| static Register bytecode_array(); |
| bool is_bytecode_array() const; |
| |
| // Returns the register for the saved bytecode offset. |
| static Register bytecode_offset(); |
| bool is_bytecode_offset() const; |
| |
| OperandSize SizeOfOperand() const; |
| |
| int32_t ToOperand() const { return kRegisterFileStartOffset - index_; } |
| static Register FromOperand(int32_t operand) { |
| return Register(kRegisterFileStartOffset - operand); |
| } |
| |
| static bool AreContiguous(Register reg1, Register reg2, |
| Register reg3 = Register(), |
| Register reg4 = Register(), |
| Register reg5 = Register()); |
| |
| std::string ToString(int parameter_count); |
| |
| bool operator==(const Register& other) const { |
| return index() == other.index(); |
| } |
| bool operator!=(const Register& other) const { |
| return index() != other.index(); |
| } |
| bool operator<(const Register& other) const { |
| return index() < other.index(); |
| } |
| bool operator<=(const Register& other) const { |
| return index() <= other.index(); |
| } |
| bool operator>(const Register& other) const { |
| return index() > other.index(); |
| } |
| bool operator>=(const Register& other) const { |
| return index() >= other.index(); |
| } |
| |
| private: |
| static const int kInvalidIndex = kMaxInt; |
| static const int kRegisterFileStartOffset = |
| InterpreterFrameConstants::kRegisterFileFromFp / kPointerSize; |
| |
| void* operator new(size_t size); |
| void operator delete(void* p); |
| |
| int index_; |
| }; |
| |
| |
| class Bytecodes { |
| public: |
| // Returns string representation of |bytecode|. |
| static const char* ToString(Bytecode bytecode); |
| |
| // Returns string representation of |bytecode|. |
| static std::string ToString(Bytecode bytecode, OperandScale operand_scale); |
| |
| // Returns string representation of |accumulator_use|. |
| static const char* AccumulatorUseToString(AccumulatorUse accumulator_use); |
| |
| // Returns string representation of |operand_type|. |
| static const char* OperandTypeToString(OperandType operand_type); |
| |
| // Returns string representation of |operand_scale|. |
| static const char* OperandScaleToString(OperandScale operand_scale); |
| |
| // Returns string representation of |operand_size|. |
| static const char* OperandSizeToString(OperandSize operand_size); |
| |
| // Returns byte value of bytecode. |
| static uint8_t ToByte(Bytecode bytecode); |
| |
| // Returns bytecode for |value|. |
| static Bytecode FromByte(uint8_t value); |
| |
| // Returns the number of operands expected by |bytecode|. |
| static int NumberOfOperands(Bytecode bytecode); |
| |
| // Returns the number of register operands expected by |bytecode|. |
| static int NumberOfRegisterOperands(Bytecode bytecode); |
| |
| // Returns the prefix bytecode representing an operand scale to be |
| // applied to a a bytecode. |
| static Bytecode OperandScaleToPrefixBytecode(OperandScale operand_scale); |
| |
| // Returns true if the operand scale requires a prefix bytecode. |
| static bool OperandScaleRequiresPrefixBytecode(OperandScale operand_scale); |
| |
| // Returns the scaling applied to scalable operands if bytecode is |
| // is a scaling prefix. |
| static OperandScale PrefixBytecodeToOperandScale(Bytecode bytecode); |
| |
| // Returns how accumulator is used by |bytecode|. |
| static AccumulatorUse GetAccumulatorUse(Bytecode bytecode); |
| |
| // Returns true if |bytecode| reads the accumulator. |
| static bool ReadsAccumulator(Bytecode bytecode); |
| |
| // Returns true if |bytecode| writes the accumulator. |
| static bool WritesAccumulator(Bytecode bytecode); |
| |
| // Return true if |bytecode| writes the accumulator with a boolean value. |
| static bool WritesBooleanToAccumulator(Bytecode bytecode); |
| |
| // Return true if |bytecode| is an accumulator load bytecode, |
| // e.g. LdaConstant, LdaTrue, Ldar. |
| static bool IsAccumulatorLoadWithoutEffects(Bytecode bytecode); |
| |
| // Returns the i-th operand of |bytecode|. |
| static OperandType GetOperandType(Bytecode bytecode, int i); |
| |
| // Returns a pointer to an array of operand types terminated in |
| // OperandType::kNone. |
| static const OperandType* GetOperandTypes(Bytecode bytecode); |
| |
| // Returns the size of the i-th operand of |bytecode|. |
| static OperandSize GetOperandSize(Bytecode bytecode, int i, |
| OperandScale operand_scale); |
| |
| // Returns the offset of the i-th operand of |bytecode| relative to the start |
| // of the bytecode. |
| static int GetOperandOffset(Bytecode bytecode, int i, |
| OperandScale operand_scale); |
| |
| // Returns a zero-based bitmap of the register operand positions of |
| // |bytecode|. |
| static int GetRegisterOperandBitmap(Bytecode bytecode); |
| |
| // Returns a debug break bytecode to replace |bytecode|. |
| static Bytecode GetDebugBreak(Bytecode bytecode); |
| |
| // Returns the size of the bytecode including its operands for the |
| // given |operand_scale|. |
| static int Size(Bytecode bytecode, OperandScale operand_scale); |
| |
| // Returns the size of |operand|. |
| static OperandSize SizeOfOperand(OperandType operand, OperandScale scale); |
| |
| // Returns the number of values which |bytecode| returns. |
| static size_t ReturnCount(Bytecode bytecode); |
| |
| // Returns true if the bytecode is a conditional jump taking |
| // an immediate byte operand (OperandType::kImm). |
| static bool IsConditionalJumpImmediate(Bytecode bytecode); |
| |
| // Returns true if the bytecode is a conditional jump taking |
| // a constant pool entry (OperandType::kIdx). |
| static bool IsConditionalJumpConstant(Bytecode bytecode); |
| |
| // Returns true if the bytecode is a conditional jump taking |
| // any kind of operand. |
| static bool IsConditionalJump(Bytecode bytecode); |
| |
| // Returns true if the bytecode is a jump or a conditional jump taking |
| // an immediate byte operand (OperandType::kImm). |
| static bool IsJumpImmediate(Bytecode bytecode); |
| |
| // Returns true if the bytecode is a jump or conditional jump taking a |
| // constant pool entry (OperandType::kIdx). |
| static bool IsJumpConstant(Bytecode bytecode); |
| |
| // Returns true if the bytecode is a jump or conditional jump taking |
| // any kind of operand. |
| static bool IsJump(Bytecode bytecode); |
| |
| // Returns true if the bytecode is a jump that internally coerces the |
| // accumulator to a boolean. |
| static bool IsJumpIfToBoolean(Bytecode bytecode); |
| |
| // Returns the equivalent jump bytecode without the accumulator coercion. |
| static Bytecode GetJumpWithoutToBoolean(Bytecode bytecode); |
| |
| // Returns true if the bytecode is a conditional jump, a jump, or a return. |
| static bool IsJumpOrReturn(Bytecode bytecode); |
| |
| // Returns true if the bytecode is a call or a constructor call. |
| static bool IsCallOrNew(Bytecode bytecode); |
| |
| // Returns true if the bytecode is a call to the runtime. |
| static bool IsCallRuntime(Bytecode bytecode); |
| |
| // Returns true if the bytecode is a debug break. |
| static bool IsDebugBreak(Bytecode bytecode); |
| |
| // Returns true if the bytecode is Ldar or Star. |
| static bool IsLdarOrStar(Bytecode bytecode); |
| |
| // Returns true if the bytecode has wider operand forms. |
| static bool IsBytecodeWithScalableOperands(Bytecode bytecode); |
| |
| // Returns true if the bytecode is a scaling prefix bytecode. |
| static bool IsPrefixScalingBytecode(Bytecode bytecode); |
| |
| // Returns true if |operand_type| is any type of register operand. |
| static bool IsRegisterOperandType(OperandType operand_type); |
| |
| // Returns true if |operand_type| represents a register used as an input. |
| static bool IsRegisterInputOperandType(OperandType operand_type); |
| |
| // Returns true if |operand_type| represents a register used as an output. |
| static bool IsRegisterOutputOperandType(OperandType operand_type); |
| |
| // Returns the number of registers represented by a register operand. For |
| // instance, a RegPair represents two registers. |
| static int GetNumberOfRegistersRepresentedBy(OperandType operand_type); |
| |
| // Returns true if |operand_type| is a maybe register operand |
| // (kMaybeReg). |
| static bool IsMaybeRegisterOperandType(OperandType operand_type); |
| |
| // Returns true if |operand_type| is a runtime-id operand (kRuntimeId). |
| static bool IsRuntimeIdOperandType(OperandType operand_type); |
| |
| // Returns true if |operand_type| is unsigned, false if signed. |
| static bool IsUnsignedOperandType(OperandType operand_type); |
| |
| // Decodes a register operand in a byte array. |
| static Register DecodeRegisterOperand(const uint8_t* operand_start, |
| OperandType operand_type, |
| OperandScale operand_scale); |
| |
| // Decodes a signed operand in a byte array. |
| static int32_t DecodeSignedOperand(const uint8_t* operand_start, |
| OperandType operand_type, |
| OperandScale operand_scale); |
| |
| // Decodes an unsigned operand in a byte array. |
| static uint32_t DecodeUnsignedOperand(const uint8_t* operand_start, |
| OperandType operand_type, |
| OperandScale operand_scale); |
| |
| // Decode a single bytecode and operands to |os|. |
| static std::ostream& Decode(std::ostream& os, const uint8_t* bytecode_start, |
| int number_of_parameters); |
| |
| // Returns true if a handler is generated for a bytecode at a given |
| // operand scale. All bytecodes have handlers at OperandScale::kSingle, |
| // but only bytecodes with scalable operands have handlers with larger |
| // OperandScale values. |
| static bool BytecodeHasHandler(Bytecode bytecode, OperandScale operand_scale); |
| |
| // Return the operand size required to hold a signed operand. |
| static OperandSize SizeForSignedOperand(int value); |
| |
| // Return the operand size required to hold an unsigned operand. |
| static OperandSize SizeForUnsignedOperand(int value); |
| |
| // Return the operand size required to hold an unsigned operand. |
| static OperandSize SizeForUnsignedOperand(size_t value); |
| |
| // Return the OperandScale required for bytecode emission of |
| // operand sizes. |
| static OperandScale OperandSizesToScale( |
| OperandSize size0, OperandSize size1 = OperandSize::kByte, |
| OperandSize size2 = OperandSize::kByte, |
| OperandSize size3 = OperandSize::kByte); |
| |
| private: |
| DISALLOW_IMPLICIT_CONSTRUCTORS(Bytecodes); |
| }; |
| |
| class CreateObjectLiteralFlags { |
| public: |
| class FlagsBits : public BitField8<int, 0, 3> {}; |
| class FastClonePropertiesCountBits |
| : public BitField8<int, FlagsBits::kNext, 3> {}; |
| STATIC_ASSERT((FlagsBits::kMask & FastClonePropertiesCountBits::kMask) == 0); |
| }; |
| |
| std::ostream& operator<<(std::ostream& os, const Bytecode& bytecode); |
| std::ostream& operator<<(std::ostream& os, const AccumulatorUse& use); |
| std::ostream& operator<<(std::ostream& os, const OperandScale& operand_scale); |
| std::ostream& operator<<(std::ostream& os, const OperandSize& operand_size); |
| std::ostream& operator<<(std::ostream& os, const OperandType& operand_type); |
| |
| } // namespace interpreter |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_INTERPRETER_BYTECODES_H_ |
