Developer Guide and Reference

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_mm256_hadd_pd

Adds horizontal pairs of float64 elements of two vectors. The corresponding Intel® AVX instruction is
VHADDPD
.

Syntax

extern __m256d _mm256_hadd_pd(__m256d m1, __m256d m2);
Arguments
m1
float64 vector used for the operation
m2
float64 vector also used for the operation
Description
Performs a SIMD addition of adjacent (horizontal) pairs of double-precision floating-point elements (float64 elements) ins the first source vector
m1
with adjacent pairs of float64 elements in the second source vector
m2
.
Returns
Result of the addition operation.