_mm_hadd_pd
Classification
SSE_ALL, Arithmetic, CPUID Test: SSE3
Header File
pmmintrin.h
Instruction
HADDPD xmm, xmm
Synopsis
 _mm_hadd_pd(__m128d a, __m128d b);
Description
Horizontally add adjacent pairs of double-precision (64-bit) floating-point elements in "a" and "b", and pack the results in "dst".
Operation
dst[63:0] := a[127:64] + a[63:0]
dst[127:64] := b[127:64] + b[63:0]