# _mm256_undefined_si256

Returns a vector of eight packed doubleword integer elements. No corresponding Intel® AVX instruction.

## Syntax

extern __m256i _mm256_undefined_si256(void);

## Description

This intrinsic returns a vector of eight packed doubleword integer elements. The content of the vector is not specified. The prototype of this intrinsic is in the immintrin.h header file.

## Returns

A vector of eight packed doubleword integer elements.

Parent topic: Intrinsics Generating Vectors of Undefined Values

## See Also

Intrinsics Returning Vectors of Undefined Values