_mm512_maskz_expand_epi8
Classification
AVX-512, Swizzle, CPUID Test: AVX512_VBMI2
Header File
Instruction
VPEXPANDB zmm {z}, zmm
Synopsis
_mm512_maskz_expand_epi8(__mmask64 k, __m512i a);
Description
Load contiguous active 8-bit integers from "a" (those with their respective bit set in mask "k"), and store the results in "dst" using zeromask "k" (elements are zeroed out when the corresponding mask bit is not set).
Operation
m := 0
FOR j := 0 to 63
i := j*8
IF k[j]
dst[i+7:i] := a[m+7:m]
m := m + 8
ELSE
dst[i+7:i] := 0
FI
ENDFOR
dst[MAX:512] := 0