ikan Uploader :
Directory : /home/ubuntu/node-v16.18.1/deps/v8/src/interpreter/
Upload File : |
| Current File : //home/ubuntu/node-v16.18.1/deps/v8/src/interpreter/bytecode-operands.h |
// Copyright 2016 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_BYTECODE_OPERANDS_H_
#define V8_INTERPRETER_BYTECODE_OPERANDS_H_
#include "src/base/bounds.h"
#include "src/common/globals.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(Reg, OperandTypeInfo::kScalableSignedByte) \
V(RegList, OperandTypeInfo::kScalableSignedByte) \
V(RegPair, OperandTypeInfo::kScalableSignedByte)
#define REGISTER_OUTPUT_OPERAND_TYPE_LIST(V) \
V(RegOut, OperandTypeInfo::kScalableSignedByte) \
V(RegOutList, OperandTypeInfo::kScalableSignedByte) \
V(RegOutPair, OperandTypeInfo::kScalableSignedByte) \
V(RegOutTriple, OperandTypeInfo::kScalableSignedByte)
#define SIGNED_SCALABLE_SCALAR_OPERAND_TYPE_LIST(V) \
V(Imm, OperandTypeInfo::kScalableSignedByte)
#define UNSIGNED_SCALABLE_SCALAR_OPERAND_TYPE_LIST(V) \
V(Idx, OperandTypeInfo::kScalableUnsignedByte) \
V(UImm, OperandTypeInfo::kScalableUnsignedByte) \
V(RegCount, OperandTypeInfo::kScalableUnsignedByte)
#define UNSIGNED_FIXED_SCALAR_OPERAND_TYPE_LIST(V) \
V(Flag8, OperandTypeInfo::kFixedUnsignedByte) \
V(IntrinsicId, OperandTypeInfo::kFixedUnsignedByte) \
V(RuntimeId, OperandTypeInfo::kFixedUnsignedShort) \
V(NativeContextIndex, OperandTypeInfo::kFixedUnsignedByte)
// Carefully ordered for operand type range checks below.
#define NON_REGISTER_OPERAND_TYPE_LIST(V) \
INVALID_OPERAND_TYPE_LIST(V) \
UNSIGNED_FIXED_SCALAR_OPERAND_TYPE_LIST(V) \
UNSIGNED_SCALABLE_SCALAR_OPERAND_TYPE_LIST(V) \
SIGNED_SCALABLE_SCALAR_OPERAND_TYPE_LIST(V)
// Carefully ordered for operand type range checks below.
#define REGISTER_OPERAND_TYPE_LIST(V) \
REGISTER_INPUT_OPERAND_TYPE_LIST(V) \
REGISTER_OUTPUT_OPERAND_TYPE_LIST(V)
// The list of operand types used by bytecodes.
// Carefully ordered for operand type range checks below.
#define OPERAND_TYPE_LIST(V) \
NON_REGISTER_OPERAND_TYPE_LIST(V) \
REGISTER_OPERAND_TYPE_LIST(V)
// 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
};
enum class ImplicitRegisterUse : uint8_t {
kNone = 0,
kReadAccumulator = 1 << 0,
kWriteAccumulator = 1 << 1,
kWriteShortStar = 1 << 2,
kReadWriteAccumulator = kReadAccumulator | kWriteAccumulator,
kReadAccumulatorWriteShortStar = kReadAccumulator | kWriteShortStar
};
constexpr inline ImplicitRegisterUse operator&(ImplicitRegisterUse lhs,
ImplicitRegisterUse rhs) {
return static_cast<ImplicitRegisterUse>(static_cast<int>(lhs) &
static_cast<int>(rhs));
}
constexpr inline ImplicitRegisterUse operator|(ImplicitRegisterUse lhs,
ImplicitRegisterUse rhs) {
return static_cast<ImplicitRegisterUse>(static_cast<int>(lhs) |
static_cast<int>(rhs));
}
V8_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& os,
const ImplicitRegisterUse& use);
V8_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& os,
const OperandScale& operand_scale);
V8_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& os,
const OperandSize& operand_size);
V8_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& os,
const OperandType& operand_type);
class BytecodeOperands : public AllStatic {
public:
// The total number of bytecode operand types used.
static const int kOperandTypeCount = static_cast<int>(OperandType::kLast) + 1;
// The total number of bytecode operand scales used.
#define OPERAND_SCALE_COUNT(...) +1
static const int kOperandScaleCount =
0 OPERAND_SCALE_LIST(OPERAND_SCALE_COUNT);
#undef OPERAND_SCALE_COUNT
static constexpr int OperandScaleAsIndex(OperandScale operand_scale) {
#ifdef DEBUG
int result = static_cast<int>(operand_scale) >> 1;
switch (operand_scale) {
case OperandScale::kSingle:
DCHECK_EQ(0, result);
break;
case OperandScale::kDouble:
DCHECK_EQ(1, result);
break;
case OperandScale::kQuadruple:
DCHECK_EQ(2, result);
break;
default:
UNREACHABLE();
}
#endif
return static_cast<int>(operand_scale) >> 1;
}
// Returns true if |implicit_register_use| reads the
// accumulator.
static constexpr bool ReadsAccumulator(
ImplicitRegisterUse implicit_register_use) {
return (implicit_register_use & ImplicitRegisterUse::kReadAccumulator) ==
ImplicitRegisterUse::kReadAccumulator;
}
// Returns true if |implicit_register_use| writes the
// accumulator.
static constexpr bool WritesAccumulator(
ImplicitRegisterUse implicit_register_use) {
return (implicit_register_use & ImplicitRegisterUse::kWriteAccumulator) ==
ImplicitRegisterUse::kWriteAccumulator;
}
// Returns true if |implicit_register_use| writes to a
// register not specified by an operand.
static constexpr bool WritesImplicitRegister(
ImplicitRegisterUse implicit_register_use) {
return (implicit_register_use & ImplicitRegisterUse::kWriteShortStar) ==
ImplicitRegisterUse::kWriteShortStar;
}
// Returns true if |operand_type| is a scalable signed byte.
static constexpr bool IsScalableSignedByte(OperandType operand_type) {
return base::IsInRange(operand_type, OperandType::kImm,
OperandType::kRegOutTriple);
}
// Returns true if |operand_type| is a scalable unsigned byte.
static constexpr bool IsScalableUnsignedByte(OperandType operand_type) {
return base::IsInRange(operand_type, OperandType::kIdx,
OperandType::kRegCount);
}
};
} // namespace interpreter
} // namespace internal
} // namespace v8
#endif // V8_INTERPRETER_BYTECODE_OPERANDS_H_
Kontol Shell Bypass