# _mm256_castpd_si256

Typecasts double-precision floating point values to integer values. No corresponding Intel® AVX instruction.

## Syntax

extern __m256i _mm256_castpd_si256(__m256d a);

## Arguments

a | float64 source vector

## Description

Performs a typecast operation from double-precision floating point values (float64 values) to integer values. This intrinsic does not introduce extra moves to the generated code. Source operand bits are passed unchanged to the result.

## Returns

A vector with 256-bit integer values.

Parent topic: Support Intrinsics for Vector Typecasting Operations