BMI1

Collaboration diagram for BMI1:

Functions
template<isa< x86 > Arch = NATIVE_BASELINE> requires (Arch.has(x86_feature::bmi1))
constexpr std::uint32_t	native::andn (std::uint32_t first, std::uint32_t second) noexcept
	ANDN: complement the first operand, then AND with the second.
template<isa< x86 > Arch = NATIVE_BASELINE> requires (Arch.has(x86_feature::bmi1))
constexpr std::uint64_t	native::andn (std::uint64_t first, std::uint64_t second) noexcept
	ANDN, with 64-bit operands.
template<isa< x86 > Arch = NATIVE_BASELINE> requires (Arch.has(x86_feature::bmi1))
constexpr std::uint32_t	native::bextr (std::uint32_t value, std::uint32_t control) noexcept
template<isa< x86 > Arch = NATIVE_BASELINE> requires (Arch.has(x86_feature::bmi1))
constexpr std::uint64_t	native::bextr (std::uint64_t value, std::uint32_t control) noexcept
	BEXTR, with a 64-bit value and the same packed control format.
template<isa< x86 > Arch = NATIVE_BASELINE> requires (Arch.has(x86_feature::bmi1))
constexpr std::uint32_t	native::bextr (std::uint32_t value, unsigned start, unsigned length) noexcept
	BEXTR with separate controls; only the low eight bits of each are used.
template<isa< x86 > Arch = NATIVE_BASELINE> requires (Arch.has(x86_feature::bmi1))
constexpr std::uint64_t	native::bextr (std::uint64_t value, unsigned start, unsigned length) noexcept
	BEXTR with a 64-bit value and separate low-eight-bit controls.
template<isa< x86 > Arch = NATIVE_BASELINE> requires (Arch.has(x86_feature::bmi1))
constexpr std::uint32_t	native::blsi (std::uint32_t value) noexcept
	BLSI: retain only the lowest set bit; zero remains zero.
template<isa< x86 > Arch = NATIVE_BASELINE> requires (Arch.has(x86_feature::bmi1))
constexpr std::uint64_t	native::blsi (std::uint64_t value) noexcept
	BLSI, with a 64-bit operand.
template<isa< x86 > Arch = NATIVE_BASELINE> requires (Arch.has(x86_feature::bmi1))
constexpr std::uint32_t	native::blsmsk (std::uint32_t value) noexcept
	BLSMSK: set every bit through the lowest set bit; zero produces all ones.
template<isa< x86 > Arch = NATIVE_BASELINE> requires (Arch.has(x86_feature::bmi1))
constexpr std::uint64_t	native::blsmsk (std::uint64_t value) noexcept
	BLSMSK, with a 64-bit operand.
template<isa< x86 > Arch = NATIVE_BASELINE> requires (Arch.has(x86_feature::bmi1))
constexpr std::uint32_t	native::blsr (std::uint32_t value) noexcept
	BLSR: clear the lowest set bit; zero remains zero.
template<isa< x86 > Arch = NATIVE_BASELINE> requires (Arch.has(x86_feature::bmi1))
constexpr std::uint64_t	native::blsr (std::uint64_t value) noexcept
	BLSR, with a 64-bit operand.
template<isa< x86 > Arch = NATIVE_BASELINE> requires (Arch.has(x86_feature::bmi1))
constexpr std::uint16_t	native::tzcnt (std::uint16_t value) noexcept
	TZCNT: count low zero bits; zero returns the operand width, including 16-bit operands.
template<isa< x86 > Arch = NATIVE_BASELINE> requires (Arch.has(x86_feature::bmi1))
constexpr std::uint32_t	native::tzcnt (std::uint32_t value) noexcept
	TZCNT, with a 32-bit operand and result; zero returns 32.
template<isa< x86 > Arch = NATIVE_BASELINE> requires (Arch.has(x86_feature::bmi1))
constexpr std::uint64_t	native::tzcnt (std::uint64_t value) noexcept
	TZCNT, with a 64-bit operand and result; zero returns 64.

Detailed Description

Integer bit operations; runtime calls require x86_feature::bmi1 and target "bmi". Constant evaluation supports every x86 Arch; weak tags select consteval overloads.

Function Documentation

bextr()

template<isa< x86 > Arch = NATIVE_BASELINE>
requires (Arch.has(x86_feature::bmi1))

std::uint32_t native::bextr ( std::uint32_t value, std::uint32_t control )

inlineconstexprexportnoexcept

BEXTR: control[7:0] is start; control[15:8] is length; higher bits are ignored. Extraction stops at the operand width; an out-of-range start or zero length yields zero.

Definition at line 56 of file bmi1.h.

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