_mm256_mask_subs_epi8
Classification
AVX-512, Arithmetic, CPUID Test: AVX512BW
Header File
Instruction
VPSUBSB ymm {k}, ymm, ymm
Synopsis
_mm256_mask_subs_epi8(__m256i src, __mmask32 k, __m256i a, __m256i b);
Description
Subtract packed signed 8-bit integers in "b" from packed 8-bit integers in "a" using saturation, 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 31
i := j*8
IF k[j]
dst[i+7:i] := Saturate8(a[i+7:i] - b[i+7:i])
ELSE
dst[i+7:i] := src[i+7:i]
FI
ENDFOR
dst[MAX:256] := 0