# _mm256_addsub_pd

Adds odd float64 elements and subtracts even float64 elements of vectors. The corresponding Intel® AVX instruction is VADDSUBPD.

## Syntax

extern __m256d _mm256_addsub_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 the odd packed double-precision floating-point elements (float64 elements) from the first source vector m1 to the odd float64 elements of the second source vector m2.

Simultaneously, the intrinsic performs subtraction of the even double-precision floating-point elements of the second source vector m2 from the even float64 elements of the first source vector m1.

## Returns

Result of the operation is stored in the result vector, which is returned by the intrinsic.

Parent topic: Intrinsics for Arithmetic Operations