Function safe_arch::store_splat_m128

pub fn store_splat_m128(r: &mut m128, a: m128)

This is supported with target feature sse only.

Stores the low lane value to all lanes of the reference given.

let a = m128::from_array([10.0, 12.0, 13.0, 14.0]);
let mut b = zeroed_m128();
store_splat_m128(&mut b, a);
let c = b.to_array();
assert_eq!(c, [10.0, 10.0, 10.0, 10.0]);