_mm_maskz_expand_epi64
Classification
AVX-512, Miscellaneous, CPUID Test: AVX512F
Header File
Instruction
VPEXPANDQ xmm {z}, xmm
Synopsis
_mm_maskz_expand_epi64(__mmask8 k, __m128i a);
Description
Load contiguous active 64-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 1
i := j*64
IF k[j]
dst[i+63:i] := a[m+63:m]
m := m + 64
ELSE
dst[i+63:i] := 0
FI
ENDFOR
dst[MAX:128] := 0