RegOnly is 8-byte version of BaseReg that allows to store either register or nothing.

This class was designed to decrease the space consumed by each extra "operand" in BaseEmitter and InstNode classes.

Public Members

uint32_t _signature

uint32_t _id

Member Functions

Construction & Destruction

void init(uint32_t signature, uint32_t id) noexcept

void init(const BaseReg& reg) noexcept

void init(const RegOnly& reg) noexcept

void reset() noexcept

Accessors

constexpr bool isNone() const noexcept

constexpr bool isReg() const noexcept

constexpr bool isPhysReg() const noexcept

constexpr bool isVirtReg() const noexcept

constexpr uint32_t signature() const noexcept

constexpr uint32_t id() const noexcept

void setId(uint32_t id) noexcept

constexpr uint32_t type() const noexcept

constexpr uint32_t group() const noexcept

Utilities

template<typename RegT>

constexpr RegT toReg() const noexcept

Member Function Documentation

void RegOnly::init(uint32_t signature, uint32_t id)noexcept¶

Initializes the RegOnly instance to hold register signature and id.

void RegOnly::reset()noexcept¶

Resets the RegOnly members to zeros (none).

bool RegOnly::isNone() constconstexprconstexprnoexcept¶

Tests whether this ExtraReg is none (same as calling Operand_::isNone()).

bool RegOnly::isReg() constconstexprconstexprnoexcept¶

Tests whether the register is valid (either virtual or physical).

bool RegOnly::isPhysReg() constconstexprconstexprnoexcept¶

Tests whether this is a physical register.

bool RegOnly::isVirtReg() constconstexprconstexprnoexcept¶

Tests whether this is a virtual register (used by BaseCompiler).

uint32_t RegOnly::signature() constconstexprconstexprnoexcept¶

Returns the register signature or 0 if no register is assigned.

uint32_t RegOnly::id() constconstexprconstexprnoexcept¶

Returns the register id.

Note: Always check whether the register is assigned before using the returned identifier as non-assigned RegOnly instance would return zero id, which is still a valid register id.

void RegOnly::setId(uint32_t id)noexcept¶

Sets the register id.

uint32_t RegOnly::type() constconstexprconstexprnoexcept¶

Returns the type of the register.

uint32_t RegOnly::group() constconstexprconstexprnoexcept¶

Returns the register group.

template<typename RegT>
RegT RegOnly::toReg() constconstexprconstexprnoexcept¶

Converts this ExtraReg to a real RegT operand.

Member Data Documentation

uint32_t RegOnly::_signature¶

Type of the operand, either kOpNone or kOpReg.

uint32_t RegOnly::_id¶

Physical or virtual register id.