_mm256_permutevar

Permutes float32 values into a 256-bit or 128-bit destination vector. The corresponding Intel® AVX instruction is VPERMILPS.

Syntax

extern __m256 _mm256_permutevar_ps(__m256 m1, __m256i control);

extern __m128 _mm_permutevar_ps(__m128 m1, __m128i control);

Arguments

m1

a 256-bit or 128-bit float32 vector

control

a vector with 2-bit control fields, one for each corresponding element of the source vector

for the 256-bit m1 source vector this control vector contains eight 2-bit control fields
for the 128-bit m1 source vector this control vector contains four 2-bit control fields

Description

Permutes single-precision floating-point values in the source vector, m1, according to the the 2-bit control fields in the low bytes of corresponding elements of a shuffle control. The result is stored in a destination vector.

Returns

A 256-bit or 128-bit float32 vector with permuted values.