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## _mm_undefined_si128

# Function _mm_undefined_si128

1.27.0 (const: unstable) · Source

    pub fn _mm_undefined_si128() -> __m128i

Available on x86-64 and target feature `sse2` only.
Expand description

Returns vector of type __m128i with indeterminate elements.with indetermination 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