Function _mm256_undefined_si256

pub fn _mm256_undefined_si256() -> __m256i

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

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