asmjit::InstRWInfo Struct Reference

Read/Write information of an instruction.

Public Members

Members

InstRWFlags _instFlags

CpuRWFlags _readFlags

CpuRWFlags _writeFlags

uint8_t _opCount

uint8_t _rmFeature

uint8_t _reserved[18]

OpRWInfo _extraReg

OpRWInfo _operands[Globals::kMaxOpCount]

Member Functions

Commons

void reset() noexcept

Instruction Flags

InstRWFlags instFlags() const noexcept

bool hasInstFlag(InstRWFlags flag) const noexcept

bool isMovOp() const noexcept

CPU Flags Information

CpuRWFlags readFlags() const noexcept

CpuRWFlags writeFlags() const noexcept

Reg/Mem Information

uint32_t rmFeature() const noexcept

Operand Read/Write Information

const OpRWInfo& extraReg() const noexcept

const OpRWInfo* operands() const noexcept

const OpRWInfo& operand(size_t index) const noexcept

uint32_t opCount() const noexcept

Member Function Documentation

void InstRWInfo::reset()noexcept

Resets this RW information to all zeros.

InstRWFlags InstRWInfo::instFlags() constnoexcept

Returns flags associated with the instruction, see InstRWFlags.

bool InstRWInfo::hasInstFlag(InstRWFlags flag) constnoexcept

Tests whether the instruction flags contain flag.

bool InstRWInfo::isMovOp() constnoexcept

Tests whether the instruction flags contain InstRWFlags::kMovOp.

CpuRWFlags InstRWInfo::readFlags() constnoexcept

Returns a mask of CPU flags read.

CpuRWFlags InstRWInfo::writeFlags() constnoexcept

Returns a mask of CPU flags written.

uint32_t InstRWInfo::rmFeature() constnoexcept

Returns the CPU feature required to replace a register operand with memory operand.

If the returned feature is zero (none) then this instruction either doesn't provide memory operand combination or there is no extra CPU feature required.

X86 Specific

Some AVX+ instructions may require extra features for replacing registers with memory operands, for example VPSLLDQ instruction only supports vpslldq reg, reg, imm combination on AVX/AVX2 capable CPUs and requires AVX-512 for vpslldq reg, mem, imm combination.

const OpRWInfo& InstRWInfo::extraReg() constnoexcept

Returns RW information of extra register operand (extraReg).

const OpRWInfo* InstRWInfo::operands() constnoexcept

Returns RW information of all instruction's operands.

const OpRWInfo& InstRWInfo::operand(size_t index) constnoexcept

Returns RW information of the operand at the given index.

uint32_t InstRWInfo::opCount() constnoexcept

Returns the number of operands this instruction has.

Member Data Documentation

InstRWFlags InstRWInfo::_instFlags

Instruction flags (there are no flags at the moment, this field is reserved).

CpuRWFlags InstRWInfo::_readFlags

CPU flags read.

CpuRWFlags InstRWInfo::_writeFlags

CPU flags written.

uint8_t InstRWInfo::_opCount

Count of operands.

uint8_t InstRWInfo::_rmFeature

CPU feature required for replacing register operand with memory operand.

uint8_t InstRWInfo::_reserved[18]

Reserved for future use.

OpRWInfo InstRWInfo::_extraReg

Read/Write info of extra register (rep{} or kz{}).

OpRWInfo InstRWInfo::_operands[Globals::kMaxOpCount]

Read/Write info of instruction operands.