_mm512_dpbusd_epi32
Classification
AVX-512, Arithmetic, CPUID Test: AVX512_VNNI
Header File
immintrin.h
Instruction
VPDPBUSD zmm, zmm, zmm
Synopsis
 _mm512_dpbusd_epi32(__m512i src, __m512i a, __m512i b);
Description
Multiply groups of 4 adjacent pairs of unsigned 8-bit integers in "a" with corresponding signed 8-bit integers in "b", producing 4 intermediate signed 16-bit results. Sum these 4 results with the corresponding 32-bit integer in "src", and store the packed 32-bit results in "dst".
Operation
FOR j := 0 to 15
	tmp1.word := Signed(ZeroExtend16(a.byte[4*j]) * SignExtend16(b.byte[4*j]))
	tmp2.word := Signed(ZeroExtend16(a.byte[4*j+1]) * SignExtend16(b.byte[4*j+1]))
	tmp3.word := Signed(ZeroExtend16(a.byte[4*j+2]) * SignExtend16(b.byte[4*j+2]))
	tmp4.word := Signed(ZeroExtend16(a.byte[4*j+3]) * SignExtend16(b.byte[4*j+3]))
	dst.dword[j] := src.dword[j] + tmp1 + tmp2 + tmp3 + tmp4
ENDFOR
dst[MAX:512] := 0