## _mm256_undefined_si256

# Function _mm256_undefined_si256

1.27.0 · Source

    pub fn _mm256_undefined_si256() -> __m256i

Available on (x86 or x86-64) and target feature `avx` and x86-64 only.
Expand description

Returns vector of type __m256i with with indeterminate elements. Despite using the word “undefined” (following Intel’s naming scheme), this non-deterministically picks some valid value and is not equivalent to `mem::MaybeUninit`. In practice, this is typically equivalent to `mem::zeroed`.

Intel’s documentation