_mm256_madd_epi16
Classification
AVX_ALL, Arithmetic, CPUID Test: AVX2
Header File
Instruction
VPMADDWD ymm, ymm, ymm
Synopsis
_mm256_madd_epi16(__m256i a, __m256i b);
Description
Multiply packed signed 16-bit integers in "a" and "b", producing intermediate signed 32-bit integers. Horizontally add adjacent pairs of intermediate 32-bit integers, and pack the results in "dst".
Operation
FOR j := 0 to 7
i := j*32
dst[i+31:i] := SignExtend32(a[i+31:i+16]*b[i+31:i+16]) + SignExtend32(a[i+15:i]*b[i+15:i])
ENDFOR
dst[MAX:256] := 0