_mm256_maskz_maddubs_epi16
Classification
AVX-512, Arithmetic, CPUID Test: AVX512BW
Header File
Instruction
VPMADDUBSW ymm {z}, ymm, ymm
Synopsis
_mm256_maskz_maddubs_epi16(__mmask16 k, __m256i a, __m256i b);
Description
Multiply packed unsigned 8-bit integers in "a" by packed signed 8-bit integers in "b", producing intermediate signed 16-bit integers. Horizontally add adjacent pairs of intermediate signed 16-bit integers, and pack the saturated results in "dst" using zeromask "k" (elements are zeroed out when the corresponding mask bit is not set).
Operation
FOR j := 0 to 15
i := j*16
IF k[j]
dst[i+15:i] := Saturate16( a[i+15:i+8]*b[i+15:i+8] + a[i+7:i]*b[i+7:i] )
ELSE
dst[i+15:i] := 0
FI
ENDFOR
dst[MAX:256] := 0