_mm_mask_expand_pd
Classification
AVX-512, Miscellaneous, CPUID Test: AVX512F
Header File
Instruction
VEXPANDPD xmm {k}, xmm
Synopsis
_mm_mask_expand_pd(__m128d src, __mmask8 k, __m128d a);
Description
Load contiguous active double-precision (64-bit) floating-point elements from "a" (those with their respective bit set in mask "k"), and store the results in "dst" using writemask "k" (elements are copied from "src" 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] := src[i+63:i]
FI
ENDFOR
dst[MAX:128] := 0