Function safe_arch::store_splat_m128d

pub fn store_splat_m128d(r: &mut m128d, a: m128d)

This is supported with target feature sse2 only.

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

let a = m128d::from_array([10.0, 12.0]);
let mut b = zeroed_m128d();
store_splat_m128d(&mut b, a);
let c = b.to_array();
assert_eq!(c, [10.0, 10.0]);