_mm256_mask_permutexvar_ps
Classification
AVX-512, Miscellaneous, CPUID Test: AVX512F
Header File
Instruction
VPERMPS ymm {k}, ymm, ymm
Synopsis
_mm256_mask_permutexvar_ps(__m256 src, __mmask8 k, __m256i idx, __m256 a);
Description
Shuffle single-precision (32-bit) floating-point elements in "a" across lanes using the corresponding index in "idx", and store the results in "dst" using writemask "k" (elements are copied from "src" when the corresponding mask bit is not set).
Operation
FOR j := 0 to 7
i := j*32
id := idx[i+2:i]*32
IF k[j]
dst[i+31:i] := a[id+31:id]
ELSE
dst[i+31:i] := src[i+31:i]
FI
ENDFOR
dst[MAX:256] := 0