| // 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 <cstdint> |
| #include <iosfwd> |
| #include <string> |
| |
| // This interface and it's implementation are independent of the |
| // libv8_base library as they are used by the interpreter and the |
| // standalone mkpeephole table generator program. |
| |
| 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(IntrinsicId, 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) \ |
| \ |
| /* Loading registers */ \ |
| V(LdrUndefined, AccumulatorUse::kNone, OperandType::kRegOut) \ |
| \ |
| /* Globals */ \ |
| V(LdaGlobal, AccumulatorUse::kWrite, OperandType::kIdx) \ |
| V(LdrGlobal, AccumulatorUse::kNone, OperandType::kIdx, OperandType::kRegOut) \ |
| V(LdaGlobalInsideTypeof, AccumulatorUse::kWrite, 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(LdrContextSlot, AccumulatorUse::kNone, OperandType::kReg, \ |
| OperandType::kIdx, OperandType::kRegOut) \ |
| 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) \ |
| \ |
| /* Property loads (LoadIC) operations */ \ |
| V(LdaNamedProperty, AccumulatorUse::kWrite, OperandType::kReg, \ |
| OperandType::kIdx, OperandType::kIdx) \ |
| V(LdrNamedProperty, AccumulatorUse::kNone, OperandType::kReg, \ |
| OperandType::kIdx, OperandType::kIdx, OperandType::kRegOut) \ |
| V(LdaKeyedProperty, AccumulatorUse::kReadWrite, OperandType::kReg, \ |
| OperandType::kIdx) \ |
| V(LdrKeyedProperty, AccumulatorUse::kRead, OperandType::kReg, \ |
| OperandType::kIdx, OperandType::kRegOut) \ |
| \ |
| /* Propery stores (StoreIC) operations */ \ |
| V(StaNamedPropertySloppy, AccumulatorUse::kRead, OperandType::kReg, \ |
| OperandType::kIdx, OperandType::kIdx) \ |
| V(StaNamedPropertyStrict, AccumulatorUse::kRead, OperandType::kReg, \ |
| OperandType::kIdx, OperandType::kIdx) \ |
| V(StaKeyedPropertySloppy, AccumulatorUse::kRead, OperandType::kReg, \ |
| OperandType::kReg, OperandType::kIdx) \ |
| V(StaKeyedPropertyStrict, AccumulatorUse::kRead, OperandType::kReg, \ |
| OperandType::kReg, OperandType::kIdx) \ |
| \ |
| /* Binary Operators */ \ |
| V(Add, AccumulatorUse::kReadWrite, OperandType::kReg, OperandType::kIdx) \ |
| V(Sub, AccumulatorUse::kReadWrite, OperandType::kReg, OperandType::kIdx) \ |
| V(Mul, AccumulatorUse::kReadWrite, OperandType::kReg, OperandType::kIdx) \ |
| V(Div, AccumulatorUse::kReadWrite, OperandType::kReg, OperandType::kIdx) \ |
| V(Mod, AccumulatorUse::kReadWrite, OperandType::kReg, OperandType::kIdx) \ |
| V(BitwiseOr, AccumulatorUse::kReadWrite, OperandType::kReg, \ |
| OperandType::kIdx) \ |
| V(BitwiseXor, AccumulatorUse::kReadWrite, OperandType::kReg, \ |
| OperandType::kIdx) \ |
| V(BitwiseAnd, AccumulatorUse::kReadWrite, OperandType::kReg, \ |
| OperandType::kIdx) \ |
| V(ShiftLeft, AccumulatorUse::kReadWrite, OperandType::kReg, \ |
| OperandType::kIdx) \ |
| V(ShiftRight, AccumulatorUse::kReadWrite, OperandType::kReg, \ |
| OperandType::kIdx) \ |
| V(ShiftRightLogical, AccumulatorUse::kReadWrite, OperandType::kReg, \ |
| OperandType::kIdx) \ |
| \ |
| /* Binary operators with immediate operands */ \ |
| V(AddSmi, AccumulatorUse::kWrite, OperandType::kImm, OperandType::kReg) \ |
| V(SubSmi, AccumulatorUse::kWrite, OperandType::kImm, OperandType::kReg) \ |
| V(BitwiseOrSmi, AccumulatorUse::kWrite, OperandType::kImm, \ |
| OperandType::kReg) \ |
| V(BitwiseAndSmi, AccumulatorUse::kWrite, OperandType::kImm, \ |
| OperandType::kReg) \ |
| V(ShiftLeftSmi, AccumulatorUse::kWrite, OperandType::kImm, \ |
| OperandType::kReg) \ |
| V(ShiftRightSmi, AccumulatorUse::kWrite, OperandType::kImm, \ |
| OperandType::kReg) \ |
| \ |
| /* Unary Operators */ \ |
| V(Inc, AccumulatorUse::kReadWrite, OperandType::kIdx) \ |
| V(Dec, AccumulatorUse::kReadWrite, OperandType::kIdx) \ |
| 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::kIntrinsicId, \ |
| 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::kRead, OperandType::kRegOut) \ |
| V(ToNumber, AccumulatorUse::kRead, OperandType::kRegOut) \ |
| V(ToObject, AccumulatorUse::kRead, OperandType::kRegOut) \ |
| \ |
| /* Literals */ \ |
| V(CreateRegExpLiteral, AccumulatorUse::kWrite, OperandType::kIdx, \ |
| OperandType::kIdx, OperandType::kFlag8) \ |
| V(CreateArrayLiteral, AccumulatorUse::kWrite, OperandType::kIdx, \ |
| OperandType::kIdx, OperandType::kFlag8) \ |
| V(CreateObjectLiteral, AccumulatorUse::kNone, OperandType::kIdx, \ |
| OperandType::kIdx, OperandType::kFlag8, OperandType::kRegOut) \ |
| \ |
| /* Closure allocation */ \ |
| V(CreateClosure, AccumulatorUse::kWrite, OperandType::kIdx, \ |
| OperandType::kFlag8) \ |
| \ |
| /* Context allocation */ \ |
| V(CreateBlockContext, AccumulatorUse::kReadWrite, OperandType::kIdx) \ |
| /* TODO(klaasb) rename Idx or add unsigned Imm OperandType? */ \ |
| V(CreateFunctionContext, AccumulatorUse::kWrite, OperandType::kIdx) \ |
| \ |
| /* 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::kNone, OperandType::kReg, \ |
| 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) \ |
| \ |
| /* Perform a check to trigger on-stack replacement */ \ |
| V(OsrPoll, AccumulatorUse::kNone, OperandType::kImm) \ |
| \ |
| /* 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 |
| }; |
| |
| inline AccumulatorUse operator&(AccumulatorUse lhs, AccumulatorUse rhs) { |
| int result = static_cast<int>(lhs) & static_cast<int>(rhs); |
| return static_cast<AccumulatorUse>(result); |
| } |
| |
| 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 |
| }; |
| |
| class Bytecodes final { |
| public: |
| // The maximum number of operands a bytecode may have. |
| static const int kMaxOperands = 4; |
| |
| // 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 without effects, |
| // e.g. LdaConstant, LdaTrue, Ldar. |
| static bool IsAccumulatorLoadWithoutEffects(Bytecode bytecode); |
| |
| // Return true if |bytecode| is a jump without effects, |
| // e.g. any jump excluding those that include type coercion like |
| // JumpIfTrueToBoolean. |
| static bool IsJumpWithoutEffects(Bytecode bytecode); |
| |
| // Return true if |bytecode| is a register load without effects, |
| // e.g. Mov, Star, LdrUndefined. |
| static bool IsRegisterLoadWithoutEffects(Bytecode bytecode); |
| |
| // Returns true if |bytecode| has no effects. |
| static bool IsWithoutExternalSideEffects(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 a pointer to an array of operand type info terminated in |
| // OperandTypeInfo::kNone. |
| static const OperandTypeInfo* GetOperandTypeInfos(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 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 |bytecode| puts a name in the accumulator. |
| static bool PutsNameInAccumulator(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 true if the handler for |bytecode| should look ahead and inline a |
| // dispatch to a Star bytecode. |
| static bool IsStarLookahead(Bytecode bytecode, OperandScale operand_scale); |
| |
| // 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); |
| |
| // 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(uint32_t value); |
| }; |
| |
| 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_ |
