Function safe_arch::set_splat_i16_m256i

#[must_use]pub fn set_splat_i16_m256i(i: i16) -> m256i

This is supported with target feature avx only.

Splat an i16 arg into an m256i lane.

let a: [i16; 16] = set_splat_i16_m256i(56).into();
assert_eq!(a, [56_i16; 16]);