Intel® C++ Compiler Classic Developer Guide and Reference

ID 767249
Date 12/16/2022
Public

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<span class='option'>_mm256_movemask_pd</span>

Extracts float64 sign mask. The corresponding Intel® AVX instruction is VMOVMSKPD.

Syntax

extern int _mm256_movemask_pd(__m256d a);

Arguments

a

float64 source vector

Description

Performs an extract operation of sign bits from four double-precision floating point elements (float64 elements) of the source vector a, and composes them into bitmasks.

Returns

An integer bitmask of four meaningful bits.