Function safe_arch::sub_m128

#[must_use]pub fn sub_m128(a: m128, b: m128) -> m128

This is supported with target feature sse only.

Lanewise a - b.

let a = m128::from_array([1.0, 2.0, 3.0, 4.0]);
let b = m128::from_array([5.0, 8.0, 12.0, 3.0]);
let c = sub_m128(a, b).to_array();
assert_eq!(c, [-4.0, -6.0, -9.0, 1.0]);