SIMDVectorS.md

SIMDVectorS (concept)

Describes all SIMD vector types provided by Simdee that have a 32-bit signed integral underlying scalar type.

Implementations

• sd::sses, sd::avxs, sd::neons, sd::dums
• sd::dual<T>, where T satisfies SIMDVectorS
• sd::vec4s, sd::vec8s

Requirements

Type that satisfies SIMDVectorS must also satisfy SIMDVector.

Member types

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

• vec_s is T
• scalar_t is std::int32_t

Conversions

A type that satisfies SIMDVectorS must be:

• explicitly convertible to and from vec_f.
• explicitly convertible to and from vec_u.

Operations

Additional operations must be provided for a type T that satisfies SIMDVectorS, unless the macro SIMDEE_NEED_INT is set to 0:

syntax	result type	description	notes
x == y	vec_b	scalar-wise equal
x != y	vec_b	scalar-wise not equal
x > y	vec_b	scalar-wise greater than
x < y	vec_b	scalar-wise less than
x >= y	vec_b	scalar-wise greater than or equal
x <= y	vec_b	scalar-wise less than or equal
~x	T	bit-wise not
x & y	T	bit-wise and
x | y	T	bit-wise or
x ^ y	T	bit-wise xor
x &= y	T	same as x = x & y
x |= y	T	same as x = x | y
x ^= y	T	same as x = x ^ y
+x	T	scalar-wise unary plus
-x	T	scalar-wise unary minus
x + y	T	scalar-wise addition
x - y	T	scalar-wise subtraction
x * y	T	scalar-wise multiplication	[1]
x += y	T	same as x = x + y
x -= y	T	same as x = x - y
x *= y	T	same as x = x * y	[1]
min(x)	T	scalar-wise minimum
max(x)	T	scalar-wise maximum
abs(x)	T	scalar-wise absolute value

where x, y are values of type T.

[1] Multiplication operations are inefficient on SSE2. Requiring SSE4.1 or AVX ensures efficient implementation.