_mm256_movemask

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.