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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_BYTECODE_TRAITS_H_
#define V8_INTERPRETER_BYTECODE_TRAITS_H_
#include "src/interpreter/bytecodes.h"
namespace v8 {
namespace internal {
namespace interpreter {
template <OperandTypeInfo>
struct OperandTypeInfoTraits {
static const bool kIsScalable = false;
static const bool kIsUnsigned = false;
static const OperandSize kUnscaledSize = OperandSize::kNone;
};
#define DECLARE_OPERAND_TYPE_INFO(Name, Scalable, Unsigned, BaseSize) \
template <> \
struct OperandTypeInfoTraits<OperandTypeInfo::k##Name> { \
static const bool kIsScalable = Scalable; \
static const bool kIsUnsigned = Unsigned; \
static const OperandSize kUnscaledSize = BaseSize; \
};
OPERAND_TYPE_INFO_LIST(DECLARE_OPERAND_TYPE_INFO)
#undef DECLARE_OPERAND_TYPE_INFO
template <OperandType>
struct OperandTraits {
typedef OperandTypeInfoTraits<OperandTypeInfo::kNone> TypeInfo;
};
#define DECLARE_OPERAND_TYPE_TRAITS(Name, InfoType) \
template <> \
struct OperandTraits<OperandType::k##Name> { \
typedef OperandTypeInfoTraits<InfoType> TypeInfo; \
};
OPERAND_TYPE_LIST(DECLARE_OPERAND_TYPE_TRAITS)
#undef DECLARE_OPERAND_TYPE_TRAITS
template <OperandType>
struct RegisterOperandTraits {
static const int kIsRegisterOperand = 0;
};
#define DECLARE_REGISTER_OPERAND(Name, _) \
template <> \
struct RegisterOperandTraits<OperandType::k##Name> { \
static const int kIsRegisterOperand = 1; \
};
REGISTER_OPERAND_TYPE_LIST(DECLARE_REGISTER_OPERAND)
#undef DECLARE_REGISTER_OPERAND
template <AccumulatorUse, OperandType...>
struct BytecodeTraits {};
template <AccumulatorUse accumulator_use, OperandType operand_0,
OperandType operand_1, OperandType operand_2, OperandType operand_3>
struct BytecodeTraits<accumulator_use, operand_0, operand_1, operand_2,
operand_3> {
static OperandType GetOperandType(int i) {
DCHECK(0 <= i && i < kOperandCount);
const OperandType kOperands[] = {operand_0, operand_1, operand_2,
operand_3};
return kOperands[i];
}
template <OperandType ot>
static inline bool HasAnyOperandsOfType() {
return operand_0 == ot || operand_1 == ot || operand_2 == ot ||
operand_3 == ot;
}
static inline bool IsScalable() {
return (OperandTraits<operand_0>::TypeInfo::kIsScalable |
OperandTraits<operand_1>::TypeInfo::kIsScalable |
OperandTraits<operand_2>::TypeInfo::kIsScalable |
OperandTraits<operand_3>::TypeInfo::kIsScalable);
}
static const AccumulatorUse kAccumulatorUse = accumulator_use;
static const int kOperandCount = 4;
static const int kRegisterOperandCount =
RegisterOperandTraits<operand_0>::kIsRegisterOperand +
RegisterOperandTraits<operand_1>::kIsRegisterOperand +
RegisterOperandTraits<operand_2>::kIsRegisterOperand +
RegisterOperandTraits<operand_3>::kIsRegisterOperand;
static const int kRegisterOperandBitmap =
RegisterOperandTraits<operand_0>::kIsRegisterOperand +
(RegisterOperandTraits<operand_1>::kIsRegisterOperand << 1) +
(RegisterOperandTraits<operand_2>::kIsRegisterOperand << 2) +
(RegisterOperandTraits<operand_3>::kIsRegisterOperand << 3);
};
template <AccumulatorUse accumulator_use, OperandType operand_0,
OperandType operand_1, OperandType operand_2>
struct BytecodeTraits<accumulator_use, operand_0, operand_1, operand_2> {
static inline OperandType GetOperandType(int i) {
DCHECK(0 <= i && i <= 2);
const OperandType kOperands[] = {operand_0, operand_1, operand_2};
return kOperands[i];
}
template <OperandType ot>
static inline bool HasAnyOperandsOfType() {
return operand_0 == ot || operand_1 == ot || operand_2 == ot;
}
static inline bool IsScalable() {
return (OperandTraits<operand_0>::TypeInfo::kIsScalable |
OperandTraits<operand_1>::TypeInfo::kIsScalable |
OperandTraits<operand_2>::TypeInfo::kIsScalable);
}
static const AccumulatorUse kAccumulatorUse = accumulator_use;
static const int kOperandCount = 3;
static const int kRegisterOperandCount =
RegisterOperandTraits<operand_0>::kIsRegisterOperand +
RegisterOperandTraits<operand_1>::kIsRegisterOperand +
RegisterOperandTraits<operand_2>::kIsRegisterOperand;
static const int kRegisterOperandBitmap =
RegisterOperandTraits<operand_0>::kIsRegisterOperand +
(RegisterOperandTraits<operand_1>::kIsRegisterOperand << 1) +
(RegisterOperandTraits<operand_2>::kIsRegisterOperand << 2);
};
template <AccumulatorUse accumulator_use, OperandType operand_0,
OperandType operand_1>
struct BytecodeTraits<accumulator_use, operand_0, operand_1> {
static inline OperandType GetOperandType(int i) {
DCHECK(0 <= i && i < kOperandCount);
const OperandType kOperands[] = {operand_0, operand_1};
return kOperands[i];
}
template <OperandType ot>
static inline bool HasAnyOperandsOfType() {
return operand_0 == ot || operand_1 == ot;
}
static inline bool IsScalable() {
return (OperandTraits<operand_0>::TypeInfo::kIsScalable |
OperandTraits<operand_1>::TypeInfo::kIsScalable);
}
static const AccumulatorUse kAccumulatorUse = accumulator_use;
static const int kOperandCount = 2;
static const int kRegisterOperandCount =
RegisterOperandTraits<operand_0>::kIsRegisterOperand +
RegisterOperandTraits<operand_1>::kIsRegisterOperand;
static const int kRegisterOperandBitmap =
RegisterOperandTraits<operand_0>::kIsRegisterOperand +
(RegisterOperandTraits<operand_1>::kIsRegisterOperand << 1);
};
template <AccumulatorUse accumulator_use, OperandType operand_0>
struct BytecodeTraits<accumulator_use, operand_0> {
static inline OperandType GetOperandType(int i) {
DCHECK(i == 0);
return operand_0;
}
template <OperandType ot>
static inline bool HasAnyOperandsOfType() {
return operand_0 == ot;
}
static inline bool IsScalable() {
return OperandTraits<operand_0>::TypeInfo::kIsScalable;
}
static const AccumulatorUse kAccumulatorUse = accumulator_use;
static const int kOperandCount = 1;
static const int kRegisterOperandCount =
RegisterOperandTraits<operand_0>::kIsRegisterOperand;
static const int kRegisterOperandBitmap =
RegisterOperandTraits<operand_0>::kIsRegisterOperand;
};
template <AccumulatorUse accumulator_use>
struct BytecodeTraits<accumulator_use> {
static inline OperandType GetOperandType(int i) {
UNREACHABLE();
return OperandType::kNone;
}
template <OperandType ot>
static inline bool HasAnyOperandsOfType() {
return false;
}
static inline bool IsScalable() { return false; }
static const AccumulatorUse kAccumulatorUse = accumulator_use;
static const int kOperandCount = 0;
static const int kRegisterOperandCount = 0;
static const int kRegisterOperandBitmap = 0;
};
template <bool>
struct OperandScaler {
static int Multiply(int size, int operand_scale) { return 0; }
};
template <>
struct OperandScaler<false> {
static int Multiply(int size, int operand_scale) { return size; }
};
template <>
struct OperandScaler<true> {
static int Multiply(int size, int operand_scale) {
return size * operand_scale;
}
};
static OperandSize ScaledOperandSize(OperandType operand_type,
OperandScale operand_scale) {
switch (operand_type) {
#define CASE(Name, TypeInfo) \
case OperandType::k##Name: { \
OperandSize base_size = OperandTypeInfoTraits<TypeInfo>::kUnscaledSize; \
int size = \
OperandScaler<OperandTypeInfoTraits<TypeInfo>::kIsScalable>::Multiply( \
static_cast<int>(base_size), static_cast<int>(operand_scale)); \
OperandSize operand_size = static_cast<OperandSize>(size); \
DCHECK(operand_size == OperandSize::kByte || \
operand_size == OperandSize::kShort || \
operand_size == OperandSize::kQuad); \
return operand_size; \
}
OPERAND_TYPE_LIST(CASE)
#undef CASE
}
UNREACHABLE();
return OperandSize::kNone;
}
} // namespace interpreter
} // namespace internal
} // namespace v8
#endif // V8_INTERPRETER_BYTECODE_TRAITS_H_
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