_mm_mask_expandloadu_epi8
Classification
AVX-512, Swizzle, CPUID Test: AVX512_VBMI2
Header File
Instruction
VPEXPANDB xmm {k}, m128
Synopsis
_mm_mask_expandloadu_epi8(__m128i src, __mmask16 k, const void* mem_addr);
Description
Load contiguous active 8-bit integers from unaligned memory at "mem_addr" (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 15
i := j*8
IF k[j]
dst[i+7:i] := MEM[mem_addr+m+7:mem_addr+m]
m := m + 8
ELSE
dst[i+7:i] := src[i+7:i]
FI
ENDFOR
dst[MAX:128] := 0