Intel® C++ Compiler Classic Developer Guide and Reference

ID 767249
Date 12/16/2022
Public

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<span class='option'>_mm256_addsub_pd</span>

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.