_mm512_mask_maddubs_epi16
Classification
AVX-512, Arithmetic, CPUID Test: AVX512BW
Header File
immintrin.h
Instruction
VPMADDUBSW zmm {k}, zmm, zmm
Synopsis
 _mm512_mask_maddubs_epi16(__m512i src, __mmask32 k, __m512i a, __m512i 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 writemask "k" (elements are copied from "src" when the corresponding mask bit is not set).
Operation
FOR j := 0 to 31
	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] := src[i+15:i]
	FI
ENDFOR
dst[MAX:512] := 0