Function safe_arch::max_m128d_s

#[must_use]pub fn max_m128d_s(a: m128d, b: m128d) -> m128d

This is supported with target feature sse2 only.

Low lane max(a, b), other lanes unchanged.

let a = m128d::from_array([1.0, 12.0]);
let b = m128d::from_array([5.0, 6.0]);
let c = max_m128d_s(a, b).to_array();
assert_eq!(c, [5.0, 12.0]);