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// 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/utils.h"
namespace v8 {
namespace internal {
namespace interpreter {
// The list of operand types used by bytecodes.
#define OPERAND_TYPE_LIST(V) \
\
/* None operand. */ \
V(None, OperandSize::kNone) \
\
/* Byte operands. */ \
V(Count8, OperandSize::kByte) \
V(Imm8, OperandSize::kByte) \
V(Idx8, OperandSize::kByte) \
V(Reg8, OperandSize::kByte) \
V(MaybeReg8, OperandSize::kByte) \
\
/* Short operands. */ \
V(Idx16, OperandSize::kShort)
// The list of bytecodes which are interpreted by the interpreter.
#define BYTECODE_LIST(V) \
\
/* Loading the accumulator */ \
V(LdaZero, OperandType::kNone) \
V(LdaSmi8, OperandType::kImm8) \
V(LdaUndefined, OperandType::kNone) \
V(LdaNull, OperandType::kNone) \
V(LdaTheHole, OperandType::kNone) \
V(LdaTrue, OperandType::kNone) \
V(LdaFalse, OperandType::kNone) \
V(LdaConstant, OperandType::kIdx8) \
V(LdaConstantWide, OperandType::kIdx16) \
\
/* Globals */ \
V(LdaGlobalSloppy, OperandType::kIdx8, OperandType::kIdx8) \
V(LdaGlobalStrict, OperandType::kIdx8, OperandType::kIdx8) \
V(LdaGlobalInsideTypeofSloppy, OperandType::kIdx8, OperandType::kIdx8) \
V(LdaGlobalInsideTypeofStrict, OperandType::kIdx8, OperandType::kIdx8) \
V(LdaGlobalSloppyWide, OperandType::kIdx16, OperandType::kIdx16) \
V(LdaGlobalStrictWide, OperandType::kIdx16, OperandType::kIdx16) \
V(LdaGlobalInsideTypeofSloppyWide, OperandType::kIdx16, OperandType::kIdx16) \
V(LdaGlobalInsideTypeofStrictWide, OperandType::kIdx16, OperandType::kIdx16) \
V(StaGlobalSloppy, OperandType::kIdx8, OperandType::kIdx8) \
V(StaGlobalStrict, OperandType::kIdx8, OperandType::kIdx8) \
V(StaGlobalSloppyWide, OperandType::kIdx16, OperandType::kIdx16) \
V(StaGlobalStrictWide, OperandType::kIdx16, OperandType::kIdx16) \
\
/* Context operations */ \
V(PushContext, OperandType::kReg8) \
V(PopContext, OperandType::kReg8) \
V(LdaContextSlot, OperandType::kReg8, OperandType::kIdx8) \
V(StaContextSlot, OperandType::kReg8, OperandType::kIdx8) \
\
/* Register-accumulator transfers */ \
V(Ldar, OperandType::kReg8) \
V(Star, OperandType::kReg8) \
\
/* LoadIC operations */ \
V(LoadICSloppy, OperandType::kReg8, OperandType::kIdx8, OperandType::kIdx8) \
V(LoadICStrict, OperandType::kReg8, OperandType::kIdx8, OperandType::kIdx8) \
V(KeyedLoadICSloppy, OperandType::kReg8, OperandType::kIdx8) \
V(KeyedLoadICStrict, OperandType::kReg8, OperandType::kIdx8) \
/* TODO(rmcilroy): Wide register operands too? */ \
V(LoadICSloppyWide, OperandType::kReg8, OperandType::kIdx16, \
OperandType::kIdx16) \
V(LoadICStrictWide, OperandType::kReg8, OperandType::kIdx16, \
OperandType::kIdx16) \
V(KeyedLoadICSloppyWide, OperandType::kReg8, OperandType::kIdx16) \
V(KeyedLoadICStrictWide, OperandType::kReg8, OperandType::kIdx16) \
\
/* StoreIC operations */ \
V(StoreICSloppy, OperandType::kReg8, OperandType::kIdx8, OperandType::kIdx8) \
V(StoreICStrict, OperandType::kReg8, OperandType::kIdx8, OperandType::kIdx8) \
V(KeyedStoreICSloppy, OperandType::kReg8, OperandType::kReg8, \
OperandType::kIdx8) \
V(KeyedStoreICStrict, OperandType::kReg8, OperandType::kReg8, \
OperandType::kIdx8) \
/* TODO(rmcilroy): Wide register operands too? */ \
V(StoreICSloppyWide, OperandType::kReg8, OperandType::kIdx16, \
OperandType::kIdx16) \
V(StoreICStrictWide, OperandType::kReg8, OperandType::kIdx16, \
OperandType::kIdx16) \
V(KeyedStoreICSloppyWide, OperandType::kReg8, OperandType::kReg8, \
OperandType::kIdx16) \
V(KeyedStoreICStrictWide, OperandType::kReg8, OperandType::kReg8, \
OperandType::kIdx16) \
\
/* Binary Operators */ \
V(Add, OperandType::kReg8) \
V(Sub, OperandType::kReg8) \
V(Mul, OperandType::kReg8) \
V(Div, OperandType::kReg8) \
V(Mod, OperandType::kReg8) \
V(BitwiseOr, OperandType::kReg8) \
V(BitwiseXor, OperandType::kReg8) \
V(BitwiseAnd, OperandType::kReg8) \
V(ShiftLeft, OperandType::kReg8) \
V(ShiftRight, OperandType::kReg8) \
V(ShiftRightLogical, OperandType::kReg8) \
\
/* Unary Operators */ \
V(Inc, OperandType::kNone) \
V(Dec, OperandType::kNone) \
V(LogicalNot, OperandType::kNone) \
V(TypeOf, OperandType::kNone) \
V(DeletePropertyStrict, OperandType::kReg8) \
V(DeletePropertySloppy, OperandType::kReg8) \
\
/* Call operations */ \
V(Call, OperandType::kReg8, OperandType::kReg8, OperandType::kCount8) \
V(CallRuntime, OperandType::kIdx16, OperandType::kMaybeReg8, \
OperandType::kCount8) \
V(CallJSRuntime, OperandType::kIdx16, OperandType::kReg8, \
OperandType::kCount8) \
\
/* New operator */ \
V(New, OperandType::kReg8, OperandType::kMaybeReg8, OperandType::kCount8) \
\
/* Test Operators */ \
V(TestEqual, OperandType::kReg8) \
V(TestNotEqual, OperandType::kReg8) \
V(TestEqualStrict, OperandType::kReg8) \
V(TestNotEqualStrict, OperandType::kReg8) \
V(TestLessThan, OperandType::kReg8) \
V(TestGreaterThan, OperandType::kReg8) \
V(TestLessThanOrEqual, OperandType::kReg8) \
V(TestGreaterThanOrEqual, OperandType::kReg8) \
V(TestInstanceOf, OperandType::kReg8) \
V(TestIn, OperandType::kReg8) \
\
/* Cast operators */ \
V(ToBoolean, OperandType::kNone) \
V(ToName, OperandType::kNone) \
V(ToNumber, OperandType::kNone) \
V(ToObject, OperandType::kNone) \
\
/* Literals */ \
V(CreateRegExpLiteral, OperandType::kIdx8, OperandType::kReg8) \
V(CreateArrayLiteral, OperandType::kIdx8, OperandType::kImm8) \
V(CreateObjectLiteral, OperandType::kIdx8, OperandType::kImm8) \
\
/* Closure allocation */ \
V(CreateClosure, OperandType::kImm8) \
\
/* Arguments allocation */ \
V(CreateMappedArguments, OperandType::kNone) \
V(CreateUnmappedArguments, OperandType::kNone) \
\
/* Control Flow */ \
V(Jump, OperandType::kImm8) \
V(JumpConstant, OperandType::kIdx8) \
V(JumpIfTrue, OperandType::kImm8) \
V(JumpIfTrueConstant, OperandType::kIdx8) \
V(JumpIfFalse, OperandType::kImm8) \
V(JumpIfFalseConstant, OperandType::kIdx8) \
V(JumpIfToBooleanTrue, OperandType::kImm8) \
V(JumpIfToBooleanTrueConstant, OperandType::kIdx8) \
V(JumpIfToBooleanFalse, OperandType::kImm8) \
V(JumpIfToBooleanFalseConstant, OperandType::kIdx8) \
V(JumpIfNull, OperandType::kImm8) \
V(JumpIfNullConstant, OperandType::kIdx8) \
V(JumpIfUndefined, OperandType::kImm8) \
V(JumpIfUndefinedConstant, OperandType::kIdx8) \
\
/* Complex flow control For..in */ \
V(ForInPrepare, OperandType::kReg8) \
V(ForInNext, OperandType::kReg8, OperandType::kReg8) \
V(ForInDone, OperandType::kReg8) \
\
/* Non-local flow control */ \
V(Throw, OperandType::kNone) \
V(Return, OperandType::kNone)
// Enumeration of the size classes of operand types used by bytecodes.
enum class OperandSize : uint8_t {
kNone = 0,
kByte = 1,
kShort = 2,
};
// 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 {
public:
static const int kMaxRegisterIndex = 127;
static const int kMinRegisterIndex = -128;
Register() : index_(kIllegalIndex) {}
explicit Register(int index) : index_(index) {
DCHECK_LE(index_, kMaxRegisterIndex);
DCHECK_GE(index_, kMinRegisterIndex);
}
int index() const {
DCHECK(index_ != kIllegalIndex);
return index_;
}
bool is_parameter() const { return index() < 0; }
bool is_valid() const { return index_ != kIllegalIndex; }
static Register FromParameterIndex(int index, int parameter_count);
int ToParameterIndex(int parameter_count) const;
static int MaxParameterIndex();
// Returns the register for the function's closure object.
static Register function_closure();
bool is_function_closure() const;
// Returns the register for the function's outer context.
static Register function_context();
bool is_function_context() const;
static Register FromOperand(uint8_t operand);
uint8_t ToOperand() const;
static bool AreContiguous(Register reg1, Register reg2,
Register reg3 = Register(),
Register reg4 = Register(),
Register reg5 = Register());
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 kIllegalIndex = kMaxInt;
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 |operand_type|.
static const char* OperandTypeToString(OperandType operand_type);
// 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);
// Return the i-th operand of |bytecode|.
static OperandType GetOperandType(Bytecode bytecode, int i);
// Return the size of the i-th operand of |bytecode|.
static OperandSize GetOperandSize(Bytecode bytecode, int i);
// Returns the offset of the i-th operand of |bytecode| relative to the start
// of the bytecode.
static int GetOperandOffset(Bytecode bytecode, int i);
// Returns the size of the bytecode including its operands.
static int Size(Bytecode bytecode);
// Returns the size of |operand|.
static OperandSize SizeOfOperand(OperandType operand);
// Return true if the bytecode is a jump or a conditional jump taking
// an immediate byte operand (OperandType::kImm8).
static bool IsJump(Bytecode bytecode);
// Return true if the bytecode is a jump or conditional jump taking a
// constant pool entry (OperandType::kIdx).
static bool IsJumpConstant(Bytecode bytecode);
// Decode a single bytecode and operands to |os|.
static std::ostream& Decode(std::ostream& os, const uint8_t* bytecode_start,
int number_of_parameters);
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(Bytecodes);
};
std::ostream& operator<<(std::ostream& os, const Bytecode& bytecode);
std::ostream& operator<<(std::ostream& os, const OperandType& operand_type);
std::ostream& operator<<(std::ostream& os, const OperandSize& operand_type);
} // namespace interpreter
} // namespace internal
} // namespace v8
#endif // V8_INTERPRETER_BYTECODES_H_
|
