_mm512_mask_shuffle_epi8
Classification
AVX-512, Swizzle, CPUID Test: AVX512BW
Header File
Instruction
VPSHUFB zmm {k}, zmm, zmm
Synopsis
_mm512_mask_shuffle_epi8(__m512i src, __mmask64 k, __m512i a, __m512i b);
Description
Shuffle 8-bit integers in "a" within 128-bit lanes using the control in the corresponding 8-bit element of "b", 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 63
i := j*8
IF k[j]
IF b[i+7] == 1
dst[i+7:i] := 0
ELSE
index[5:0] := b[i+3:i] + (j & 0x30)
dst[i+7:i] := a[index*8+7:index*8]
FI
ELSE
dst[i+7:i] := src[i+7:i]
FI
ENDFOR
dst[MAX:512] := 0