_mm_maddubs_pi16
Classification
SSE_ALL, Arithmetic, CPUID Test: SSSE3
Header File
Instruction
PMADDUBSW mm, mm
Synopsis
_mm_maddubs_pi16(__m64 a, __m64 b);
Description
Vertically multiply each unsigned 8-bit integer from "a" with the corresponding signed 8-bit integer from "b", producing intermediate signed 16-bit integers. Horizontally add adjacent pairs of intermediate signed 16-bit integers, and pack the saturated results in "dst".
Operation
FOR j := 0 to 3
i := j*16
dst[i+15:i] := Saturate16( a[i+15:i+8]*b[i+15:i+8] + a[i+7:i]*b[i+7:i] )
ENDFOR