SIMDVectorB.md

SIMDVectorB (concept)

Describes all SIMD vector types provided by Simdee that have a boolean underlying scalar type.

Implementations

• sd::sseb, sd::avxb, sd::neonb, sd::dumb
• sd::dual<T>, where T satisfies SIMDVectorB
• sd::vec4b, sd::vec8b

Requirements

Type that satisfies SIMDVectorB must also satisfy SIMDVector.

Member types

Additional requirements apply regarding member types of a type T that satisfies SIMDVectorB:

• vec_b is T
• scalar_t is sd::bool32_t
• T has an extra member type mask_t, which is an instantiation of sd::impl::mask

Conversions

A type that satisfies SIMDVectorB must be explicitly convertible to vec_u.

Operations

Additional operations must be provided for a type T that satisfies SIMDVectorB:

syntax	result type	description	notes
!x	T	scalar-wise logical not
x && y	T	scalar-wise logical and, short-circuit evaluation is disabled
x || y	T	scalar-wise logical or, short-circuit evaluation is disabled
x == y	T	scalar-wise equal
x != y	T	scalar-wise not equal
mask(x)	mask_t	provide a bit-mask of truth values	[1]
any(x)	bool	returns true if any of the scalars is true
all(x)	bool	returns true if all of the scalars are true

where x, y are values of type T.

[1] mask operation is inefficient on NEON.