| // 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. |
| |
| #include "src/interpreter/bytecodes.h" |
| |
| #include <iomanip> |
| |
| #include "src/frames.h" |
| #include "src/interpreter/bytecode-traits.h" |
| #include "src/interpreter/interpreter.h" |
| |
| namespace v8 { |
| namespace internal { |
| namespace interpreter { |
| |
| |
| // static |
| const char* Bytecodes::ToString(Bytecode bytecode) { |
| switch (bytecode) { |
| #define CASE(Name, ...) \ |
| case Bytecode::k##Name: \ |
| return #Name; |
| BYTECODE_LIST(CASE) |
| #undef CASE |
| } |
| UNREACHABLE(); |
| return ""; |
| } |
| |
| // static |
| std::string Bytecodes::ToString(Bytecode bytecode, OperandScale operand_scale) { |
| static const char kSeparator = '.'; |
| |
| std::string value(ToString(bytecode)); |
| if (operand_scale > OperandScale::kSingle) { |
| Bytecode prefix_bytecode = OperandScaleToPrefixBytecode(operand_scale); |
| std::string suffix = ToString(prefix_bytecode); |
| return value.append(1, kSeparator).append(suffix); |
| } else { |
| return value; |
| } |
| } |
| |
| // static |
| const char* Bytecodes::AccumulatorUseToString(AccumulatorUse accumulator_use) { |
| switch (accumulator_use) { |
| case AccumulatorUse::kNone: |
| return "None"; |
| case AccumulatorUse::kRead: |
| return "Read"; |
| case AccumulatorUse::kWrite: |
| return "Write"; |
| case AccumulatorUse::kReadWrite: |
| return "ReadWrite"; |
| } |
| UNREACHABLE(); |
| return ""; |
| } |
| |
| // static |
| const char* Bytecodes::OperandTypeToString(OperandType operand_type) { |
| switch (operand_type) { |
| #define CASE(Name, _) \ |
| case OperandType::k##Name: \ |
| return #Name; |
| OPERAND_TYPE_LIST(CASE) |
| #undef CASE |
| } |
| UNREACHABLE(); |
| return ""; |
| } |
| |
| // static |
| const char* Bytecodes::OperandScaleToString(OperandScale operand_scale) { |
| switch (operand_scale) { |
| case OperandScale::kSingle: |
| return "Single"; |
| case OperandScale::kDouble: |
| return "Double"; |
| case OperandScale::kQuadruple: |
| return "Quadruple"; |
| case OperandScale::kInvalid: |
| UNREACHABLE(); |
| } |
| return ""; |
| } |
| |
| // static |
| const char* Bytecodes::OperandSizeToString(OperandSize operand_size) { |
| switch (operand_size) { |
| case OperandSize::kNone: |
| return "None"; |
| case OperandSize::kByte: |
| return "Byte"; |
| case OperandSize::kShort: |
| return "Short"; |
| case OperandSize::kQuad: |
| return "Quad"; |
| } |
| UNREACHABLE(); |
| return ""; |
| } |
| |
| |
| // static |
| uint8_t Bytecodes::ToByte(Bytecode bytecode) { |
| DCHECK(bytecode <= Bytecode::kLast); |
| return static_cast<uint8_t>(bytecode); |
| } |
| |
| |
| // static |
| Bytecode Bytecodes::FromByte(uint8_t value) { |
| Bytecode bytecode = static_cast<Bytecode>(value); |
| DCHECK(bytecode <= Bytecode::kLast); |
| return bytecode; |
| } |
| |
| |
| // static |
| Bytecode Bytecodes::GetDebugBreak(Bytecode bytecode) { |
| DCHECK(!IsDebugBreak(bytecode)); |
| if (bytecode == Bytecode::kWide) { |
| return Bytecode::kDebugBreakWide; |
| } |
| if (bytecode == Bytecode::kExtraWide) { |
| return Bytecode::kDebugBreakExtraWide; |
| } |
| int bytecode_size = Size(bytecode, OperandScale::kSingle); |
| #define RETURN_IF_DEBUG_BREAK_SIZE_MATCHES(Name, ...) \ |
| if (bytecode_size == Size(Bytecode::k##Name, OperandScale::kSingle)) { \ |
| return Bytecode::k##Name; \ |
| } |
| DEBUG_BREAK_PLAIN_BYTECODE_LIST(RETURN_IF_DEBUG_BREAK_SIZE_MATCHES) |
| #undef RETURN_IF_DEBUG_BREAK_SIZE_MATCHES |
| UNREACHABLE(); |
| return Bytecode::kIllegal; |
| } |
| |
| // static |
| int Bytecodes::Size(Bytecode bytecode, OperandScale operand_scale) { |
| int size = 1; |
| for (int i = 0; i < NumberOfOperands(bytecode); i++) { |
| OperandSize operand_size = GetOperandSize(bytecode, i, operand_scale); |
| int delta = static_cast<int>(operand_size); |
| DCHECK(base::bits::IsPowerOfTwo32(static_cast<uint32_t>(delta))); |
| size += delta; |
| } |
| return size; |
| } |
| |
| |
| // static |
| int Bytecodes::NumberOfOperands(Bytecode bytecode) { |
| DCHECK(bytecode <= Bytecode::kLast); |
| switch (bytecode) { |
| #define CASE(Name, ...) \ |
| case Bytecode::k##Name: \ |
| return BytecodeTraits<__VA_ARGS__>::kOperandCount; |
| BYTECODE_LIST(CASE) |
| #undef CASE |
| } |
| UNREACHABLE(); |
| return 0; |
| } |
| |
| |
| // static |
| int Bytecodes::NumberOfRegisterOperands(Bytecode bytecode) { |
| DCHECK(bytecode <= Bytecode::kLast); |
| switch (bytecode) { |
| #define CASE(Name, ...) \ |
| case Bytecode::k##Name: \ |
| typedef BytecodeTraits<__VA_ARGS__> Name##Trait; \ |
| return Name##Trait::kRegisterOperandCount; |
| BYTECODE_LIST(CASE) |
| #undef CASE |
| } |
| UNREACHABLE(); |
| return false; |
| } |
| |
| // static |
| Bytecode Bytecodes::OperandScaleToPrefixBytecode(OperandScale operand_scale) { |
| switch (operand_scale) { |
| case OperandScale::kQuadruple: |
| return Bytecode::kExtraWide; |
| case OperandScale::kDouble: |
| return Bytecode::kWide; |
| default: |
| UNREACHABLE(); |
| return Bytecode::kIllegal; |
| } |
| } |
| |
| // static |
| bool Bytecodes::OperandScaleRequiresPrefixBytecode(OperandScale operand_scale) { |
| return operand_scale != OperandScale::kSingle; |
| } |
| |
| // static |
| OperandScale Bytecodes::PrefixBytecodeToOperandScale(Bytecode bytecode) { |
| switch (bytecode) { |
| case Bytecode::kExtraWide: |
| case Bytecode::kDebugBreakExtraWide: |
| return OperandScale::kQuadruple; |
| case Bytecode::kWide: |
| case Bytecode::kDebugBreakWide: |
| return OperandScale::kDouble; |
| default: |
| UNREACHABLE(); |
| return OperandScale::kSingle; |
| } |
| } |
| |
| // static |
| AccumulatorUse Bytecodes::GetAccumulatorUse(Bytecode bytecode) { |
| DCHECK(bytecode <= Bytecode::kLast); |
| switch (bytecode) { |
| #define CASE(Name, ...) \ |
| case Bytecode::k##Name: \ |
| return BytecodeTraits<__VA_ARGS__>::kAccumulatorUse; |
| BYTECODE_LIST(CASE) |
| #undef CASE |
| } |
| UNREACHABLE(); |
| return AccumulatorUse::kNone; |
| } |
| |
| // static |
| bool Bytecodes::ReadsAccumulator(Bytecode bytecode) { |
| return (GetAccumulatorUse(bytecode) & AccumulatorUse::kRead) == |
| AccumulatorUse::kRead; |
| } |
| |
| // static |
| bool Bytecodes::WritesAccumulator(Bytecode bytecode) { |
| return (GetAccumulatorUse(bytecode) & AccumulatorUse::kWrite) == |
| AccumulatorUse::kWrite; |
| } |
| |
| // static |
| OperandType Bytecodes::GetOperandType(Bytecode bytecode, int i) { |
| DCHECK(bytecode <= Bytecode::kLast); |
| switch (bytecode) { |
| #define CASE(Name, ...) \ |
| case Bytecode::k##Name: \ |
| return BytecodeTraits<__VA_ARGS__>::GetOperandType(i); |
| BYTECODE_LIST(CASE) |
| #undef CASE |
| } |
| UNREACHABLE(); |
| return OperandType::kNone; |
| } |
| |
| // static |
| OperandSize Bytecodes::GetOperandSize(Bytecode bytecode, int i, |
| OperandScale operand_scale) { |
| OperandType op_type = GetOperandType(bytecode, i); |
| return ScaledOperandSize(op_type, operand_scale); |
| } |
| |
| // static |
| int Bytecodes::GetRegisterOperandBitmap(Bytecode bytecode) { |
| DCHECK(bytecode <= Bytecode::kLast); |
| switch (bytecode) { |
| #define CASE(Name, ...) \ |
| case Bytecode::k##Name: \ |
| typedef BytecodeTraits<__VA_ARGS__> Name##Trait; \ |
| return Name##Trait::kRegisterOperandBitmap; |
| BYTECODE_LIST(CASE) |
| #undef CASE |
| } |
| UNREACHABLE(); |
| return false; |
| } |
| |
| // static |
| int Bytecodes::GetOperandOffset(Bytecode bytecode, int i, |
| OperandScale operand_scale) { |
| // TODO(oth): restore this to a statically determined constant. |
| int offset = 1; |
| for (int operand_index = 0; operand_index < i; ++operand_index) { |
| OperandSize operand_size = |
| GetOperandSize(bytecode, operand_index, operand_scale); |
| offset += static_cast<int>(operand_size); |
| } |
| return offset; |
| } |
| |
| // static |
| OperandSize Bytecodes::SizeOfOperand(OperandType operand_type, |
| OperandScale operand_scale) { |
| return static_cast<OperandSize>( |
| ScaledOperandSize(operand_type, operand_scale)); |
| } |
| |
| // static |
| bool Bytecodes::IsConditionalJumpImmediate(Bytecode bytecode) { |
| return bytecode == Bytecode::kJumpIfTrue || |
| bytecode == Bytecode::kJumpIfFalse || |
| bytecode == Bytecode::kJumpIfToBooleanTrue || |
| bytecode == Bytecode::kJumpIfToBooleanFalse || |
| bytecode == Bytecode::kJumpIfNotHole || |
| bytecode == Bytecode::kJumpIfNull || |
| bytecode == Bytecode::kJumpIfUndefined; |
| } |
| |
| |
| // static |
| bool Bytecodes::IsConditionalJumpConstant(Bytecode bytecode) { |
| return bytecode == Bytecode::kJumpIfTrueConstant || |
| bytecode == Bytecode::kJumpIfFalseConstant || |
| bytecode == Bytecode::kJumpIfToBooleanTrueConstant || |
| bytecode == Bytecode::kJumpIfToBooleanFalseConstant || |
| bytecode == Bytecode::kJumpIfNotHoleConstant || |
| bytecode == Bytecode::kJumpIfNullConstant || |
| bytecode == Bytecode::kJumpIfUndefinedConstant; |
| } |
| |
| // static |
| bool Bytecodes::IsConditionalJump(Bytecode bytecode) { |
| return IsConditionalJumpImmediate(bytecode) || |
| IsConditionalJumpConstant(bytecode); |
| } |
| |
| |
| // static |
| bool Bytecodes::IsJumpImmediate(Bytecode bytecode) { |
| return bytecode == Bytecode::kJump || IsConditionalJumpImmediate(bytecode); |
| } |
| |
| |
| // static |
| bool Bytecodes::IsJumpConstant(Bytecode bytecode) { |
| return bytecode == Bytecode::kJumpConstant || |
| IsConditionalJumpConstant(bytecode); |
| } |
| |
| // static |
| bool Bytecodes::IsJump(Bytecode bytecode) { |
| return IsJumpImmediate(bytecode) || IsJumpConstant(bytecode); |
| } |
| |
| |
| // static |
| bool Bytecodes::IsCallOrNew(Bytecode bytecode) { |
| return bytecode == Bytecode::kCall || bytecode == Bytecode::kTailCall || |
| bytecode == Bytecode::kNew; |
| } |
| |
| // static |
| bool Bytecodes::IsCallRuntime(Bytecode bytecode) { |
| return bytecode == Bytecode::kCallRuntime || |
| bytecode == Bytecode::kCallRuntimeForPair || |
| bytecode == Bytecode::kInvokeIntrinsic; |
| } |
| |
| // static |
| bool Bytecodes::IsDebugBreak(Bytecode bytecode) { |
| switch (bytecode) { |
| #define CASE(Name, ...) case Bytecode::k##Name: |
| DEBUG_BREAK_BYTECODE_LIST(CASE); |
| #undef CASE |
| return true; |
| default: |
| break; |
| } |
| return false; |
| } |
| |
| // static |
| bool Bytecodes::IsBytecodeWithScalableOperands(Bytecode bytecode) { |
| switch (bytecode) { |
| #define CASE(Name, ...) \ |
| case Bytecode::k##Name: \ |
| typedef BytecodeTraits<__VA_ARGS__> Name##Trait; \ |
| return Name##Trait::IsScalable(); |
| BYTECODE_LIST(CASE) |
| #undef CASE |
| } |
| UNREACHABLE(); |
| return false; |
| } |
| |
| // static |
| bool Bytecodes::IsPrefixScalingBytecode(Bytecode bytecode) { |
| switch (bytecode) { |
| case Bytecode::kExtraWide: |
| case Bytecode::kDebugBreakExtraWide: |
| case Bytecode::kWide: |
| case Bytecode::kDebugBreakWide: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| // static |
| bool Bytecodes::IsJumpOrReturn(Bytecode bytecode) { |
| return bytecode == Bytecode::kReturn || IsJump(bytecode); |
| } |
| |
| // static |
| bool Bytecodes::IsMaybeRegisterOperandType(OperandType operand_type) { |
| return operand_type == OperandType::kMaybeReg; |
| } |
| |
| // static |
| bool Bytecodes::IsRegisterOperandType(OperandType operand_type) { |
| switch (operand_type) { |
| #define CASE(Name, _) \ |
| case OperandType::k##Name: \ |
| return true; |
| REGISTER_OPERAND_TYPE_LIST(CASE) |
| #undef CASE |
| #define CASE(Name, _) \ |
| case OperandType::k##Name: \ |
| break; |
| NON_REGISTER_OPERAND_TYPE_LIST(CASE) |
| #undef CASE |
| } |
| return false; |
| } |
| |
| // static |
| bool Bytecodes::IsRegisterInputOperandType(OperandType operand_type) { |
| switch (operand_type) { |
| #define CASE(Name, _) \ |
| case OperandType::k##Name: \ |
| return true; |
| REGISTER_INPUT_OPERAND_TYPE_LIST(CASE) |
| #undef CASE |
| #define CASE(Name, _) \ |
| case OperandType::k##Name: \ |
| break; |
| NON_REGISTER_OPERAND_TYPE_LIST(CASE) |
| REGISTER_OUTPUT_OPERAND_TYPE_LIST(CASE) |
| #undef CASE |
| } |
| return false; |
| } |
| |
| // static |
| bool Bytecodes::IsRegisterOutputOperandType(OperandType operand_type) { |
| switch (operand_type) { |
| #define CASE(Name, _) \ |
| case OperandType::k##Name: \ |
| return true; |
| REGISTER_OUTPUT_OPERAND_TYPE_LIST(CASE) |
| #undef CASE |
| #define CASE(Name, _) \ |
| case OperandType::k##Name: \ |
| break; |
| NON_REGISTER_OPERAND_TYPE_LIST(CASE) |
| REGISTER_INPUT_OPERAND_TYPE_LIST(CASE) |
| #undef CASE |
| } |
| return false; |
| } |
| |
| // static |
| bool Bytecodes::IsUnsignedOperandType(OperandType operand_type) { |
| switch (operand_type) { |
| #define CASE(Name, _) \ |
| case OperandType::k##Name: \ |
| return OperandTraits<OperandType::k##Name>::TypeInfo::kIsUnsigned; |
| OPERAND_TYPE_LIST(CASE) |
| #undef CASE |
| } |
| UNREACHABLE(); |
| return false; |
| } |
| |
| // static |
| OperandScale Bytecodes::NextOperandScale(OperandScale operand_scale) { |
| DCHECK(operand_scale >= OperandScale::kSingle && |
| operand_scale <= OperandScale::kMaxValid); |
| return static_cast<OperandScale>(2 * static_cast<int>(operand_scale)); |
| } |
| |
| // static |
| Register Bytecodes::DecodeRegisterOperand(const uint8_t* operand_start, |
| OperandType operand_type, |
| OperandScale operand_scale) { |
| DCHECK(Bytecodes::IsRegisterOperandType(operand_type)); |
| int32_t operand = |
| DecodeSignedOperand(operand_start, operand_type, operand_scale); |
| return Register::FromOperand(operand); |
| } |
| |
| // static |
| int32_t Bytecodes::DecodeSignedOperand(const uint8_t* operand_start, |
| OperandType operand_type, |
| OperandScale operand_scale) { |
| DCHECK(!Bytecodes::IsUnsignedOperandType(operand_type)); |
| switch (Bytecodes::SizeOfOperand(operand_type, operand_scale)) { |
| case OperandSize::kByte: |
| return static_cast<int8_t>(*operand_start); |
| case OperandSize::kShort: |
| return static_cast<int16_t>(ReadUnalignedUInt16(operand_start)); |
| case OperandSize::kQuad: |
| return static_cast<int32_t>(ReadUnalignedUInt32(operand_start)); |
| case OperandSize::kNone: |
| UNREACHABLE(); |
| } |
| return 0; |
| } |
| |
| // static |
| uint32_t Bytecodes::DecodeUnsignedOperand(const uint8_t* operand_start, |
| OperandType operand_type, |
| OperandScale operand_scale) { |
| DCHECK(Bytecodes::IsUnsignedOperandType(operand_type)); |
| switch (Bytecodes::SizeOfOperand(operand_type, operand_scale)) { |
| case OperandSize::kByte: |
| return *operand_start; |
| case OperandSize::kShort: |
| return ReadUnalignedUInt16(operand_start); |
| case OperandSize::kQuad: |
| return ReadUnalignedUInt32(operand_start); |
| case OperandSize::kNone: |
| UNREACHABLE(); |
| } |
| return 0; |
| } |
| |
| // static |
| std::ostream& Bytecodes::Decode(std::ostream& os, const uint8_t* bytecode_start, |
| int parameter_count) { |
| Bytecode bytecode = Bytecodes::FromByte(bytecode_start[0]); |
| int prefix_offset = 0; |
| OperandScale operand_scale = OperandScale::kSingle; |
| if (IsPrefixScalingBytecode(bytecode)) { |
| prefix_offset = 1; |
| operand_scale = Bytecodes::PrefixBytecodeToOperandScale(bytecode); |
| bytecode = Bytecodes::FromByte(bytecode_start[1]); |
| } |
| |
| // Prepare to print bytecode and operands as hex digits. |
| std::ios saved_format(nullptr); |
| saved_format.copyfmt(saved_format); |
| os.fill('0'); |
| os.flags(std::ios::hex); |
| |
| int bytecode_size = Bytecodes::Size(bytecode, operand_scale); |
| for (int i = 0; i < prefix_offset + bytecode_size; i++) { |
| os << std::setw(2) << static_cast<uint32_t>(bytecode_start[i]) << ' '; |
| } |
| os.copyfmt(saved_format); |
| |
| const int kBytecodeColumnSize = 6; |
| for (int i = prefix_offset + bytecode_size; i < kBytecodeColumnSize; i++) { |
| os << " "; |
| } |
| |
| os << Bytecodes::ToString(bytecode, operand_scale) << " "; |
| |
| // Operands for the debug break are from the original instruction. |
| if (IsDebugBreak(bytecode)) return os; |
| |
| int number_of_operands = NumberOfOperands(bytecode); |
| int range = 0; |
| for (int i = 0; i < number_of_operands; i++) { |
| OperandType op_type = GetOperandType(bytecode, i); |
| const uint8_t* operand_start = |
| &bytecode_start[prefix_offset + |
| GetOperandOffset(bytecode, i, operand_scale)]; |
| switch (op_type) { |
| case interpreter::OperandType::kRegCount: |
| os << "#" |
| << DecodeUnsignedOperand(operand_start, op_type, operand_scale); |
| break; |
| case interpreter::OperandType::kIdx: |
| case interpreter::OperandType::kRuntimeId: |
| os << "[" |
| << DecodeUnsignedOperand(operand_start, op_type, operand_scale) |
| << "]"; |
| break; |
| case interpreter::OperandType::kImm: |
| os << "[" << DecodeSignedOperand(operand_start, op_type, operand_scale) |
| << "]"; |
| break; |
| case interpreter::OperandType::kFlag8: |
| os << "#" |
| << DecodeUnsignedOperand(operand_start, op_type, operand_scale); |
| break; |
| case interpreter::OperandType::kMaybeReg: |
| case interpreter::OperandType::kReg: |
| case interpreter::OperandType::kRegOut: { |
| Register reg = |
| DecodeRegisterOperand(operand_start, op_type, operand_scale); |
| os << reg.ToString(parameter_count); |
| break; |
| } |
| case interpreter::OperandType::kRegOutTriple: |
| range += 1; |
| case interpreter::OperandType::kRegOutPair: |
| case interpreter::OperandType::kRegPair: { |
| range += 1; |
| Register first_reg = |
| DecodeRegisterOperand(operand_start, op_type, operand_scale); |
| Register last_reg = Register(first_reg.index() + range); |
| os << first_reg.ToString(parameter_count) << "-" |
| << last_reg.ToString(parameter_count); |
| break; |
| } |
| case interpreter::OperandType::kNone: |
| UNREACHABLE(); |
| break; |
| } |
| if (i != number_of_operands - 1) { |
| os << ", "; |
| } |
| } |
| return os; |
| } |
| |
| // static |
| bool Bytecodes::BytecodeHasHandler(Bytecode bytecode, |
| OperandScale operand_scale) { |
| return operand_scale == OperandScale::kSingle || |
| Bytecodes::IsBytecodeWithScalableOperands(bytecode); |
| } |
| |
| std::ostream& operator<<(std::ostream& os, const Bytecode& bytecode) { |
| return os << Bytecodes::ToString(bytecode); |
| } |
| |
| std::ostream& operator<<(std::ostream& os, const AccumulatorUse& use) { |
| return os << Bytecodes::AccumulatorUseToString(use); |
| } |
| |
| std::ostream& operator<<(std::ostream& os, const OperandSize& operand_size) { |
| return os << Bytecodes::OperandSizeToString(operand_size); |
| } |
| |
| std::ostream& operator<<(std::ostream& os, const OperandScale& operand_scale) { |
| return os << Bytecodes::OperandScaleToString(operand_scale); |
| } |
| |
| std::ostream& operator<<(std::ostream& os, const OperandType& operand_type) { |
| return os << Bytecodes::OperandTypeToString(operand_type); |
| } |
| |
| static const int kLastParamRegisterIndex = |
| -InterpreterFrameConstants::kLastParamFromRegisterPointer / kPointerSize; |
| static const int kFunctionClosureRegisterIndex = |
| -InterpreterFrameConstants::kFunctionFromRegisterPointer / kPointerSize; |
| static const int kCurrentContextRegisterIndex = |
| -InterpreterFrameConstants::kContextFromRegisterPointer / kPointerSize; |
| static const int kNewTargetRegisterIndex = |
| -InterpreterFrameConstants::kNewTargetFromRegisterPointer / kPointerSize; |
| |
| bool Register::is_byte_operand() const { |
| return index_ >= -kMaxInt8 && index_ <= -kMinInt8; |
| } |
| |
| bool Register::is_short_operand() const { |
| return index_ >= -kMaxInt16 && index_ <= -kMinInt16; |
| } |
| |
| Register Register::FromParameterIndex(int index, int parameter_count) { |
| DCHECK_GE(index, 0); |
| DCHECK_LT(index, parameter_count); |
| int register_index = kLastParamRegisterIndex - parameter_count + index + 1; |
| DCHECK_LT(register_index, 0); |
| return Register(register_index); |
| } |
| |
| |
| int Register::ToParameterIndex(int parameter_count) const { |
| DCHECK(is_parameter()); |
| return index() - kLastParamRegisterIndex + parameter_count - 1; |
| } |
| |
| |
| Register Register::function_closure() { |
| return Register(kFunctionClosureRegisterIndex); |
| } |
| |
| |
| bool Register::is_function_closure() const { |
| return index() == kFunctionClosureRegisterIndex; |
| } |
| |
| |
| Register Register::current_context() { |
| return Register(kCurrentContextRegisterIndex); |
| } |
| |
| |
| bool Register::is_current_context() const { |
| return index() == kCurrentContextRegisterIndex; |
| } |
| |
| |
| Register Register::new_target() { return Register(kNewTargetRegisterIndex); } |
| |
| |
| bool Register::is_new_target() const { |
| return index() == kNewTargetRegisterIndex; |
| } |
| |
| bool Register::AreContiguous(Register reg1, Register reg2, Register reg3, |
| Register reg4, Register reg5) { |
| if (reg1.index() + 1 != reg2.index()) { |
| return false; |
| } |
| if (reg3.is_valid() && reg2.index() + 1 != reg3.index()) { |
| return false; |
| } |
| if (reg4.is_valid() && reg3.index() + 1 != reg4.index()) { |
| return false; |
| } |
| if (reg5.is_valid() && reg4.index() + 1 != reg5.index()) { |
| return false; |
| } |
| return true; |
| } |
| |
| std::string Register::ToString(int parameter_count) { |
| if (is_current_context()) { |
| return std::string("<context>"); |
| } else if (is_function_closure()) { |
| return std::string("<closure>"); |
| } else if (is_new_target()) { |
| return std::string("<new.target>"); |
| } else if (is_parameter()) { |
| int parameter_index = ToParameterIndex(parameter_count); |
| if (parameter_index == 0) { |
| return std::string("<this>"); |
| } else { |
| std::ostringstream s; |
| s << "a" << parameter_index - 1; |
| return s.str(); |
| } |
| } else { |
| std::ostringstream s; |
| s << "r" << index(); |
| return s.str(); |
| } |
| } |
| |
| } // namespace interpreter |
| } // namespace internal |
| } // namespace v8 |