_mm512_mask_permutexvar_pd
Classification
AVX-512, Swizzle, CPUID Test: AVX512F
Header File
Instruction
VPERMPD zmm {k}, zmm, zmm
Synopsis
_mm512_mask_permutexvar_pd(__m512d src, __mmask8 k, __m512i idx, __m512d a);
Description
Shuffle double-precision (64-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*64
id := idx[i+2:i]*64
IF k[j]
dst[i+63:i] := a[id+63:id]
ELSE
dst[i+63:i] := src[i+63:i]
FI
ENDFOR
dst[MAX:512] := 0