Function safe_arch::zero_extend_m128i

#[must_use]pub fn zero_extend_m128i(a: m128i) -> m256i

This is supported with target feature avx only.

Zero extend an m128i to m256i

let a: [i32; 8] = zero_extend_m128i(m128i::from([1, 2, 3, 4])).into();
assert_eq!(a, [1, 2, 3, 4, 0, 0, 0, 0]);