_mm_dpbusds_avx_epi32
Classification
AVX_ALL, Arithmetic, CPUID Test: AVX_VNNI
Header File
immintrin.h
Instruction
VPDPBUSDS xmm, xmm, xmm
Synopsis
 _mm_dpbusds_avx_epi32(__m128i src, __m128i a, __m128i 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" using signed saturation, and store the packed 32-bit results in "dst".
Operation
FOR j := 0 to 3
	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] := Saturate32(src.dword[j] + tmp1 + tmp2 + tmp3 + tmp4)
ENDFOR
dst[MAX:128] := 0