Function safe_arch::set_i64_m128i

#[must_use]pub fn set_i64_m128i(a: i64, b: i64) -> m128i

This is supported with target feature sse2 only.

Sets the args into an m128i, first arg is the high lane.

let a = m128i::from([1_i64, 0]);
let b = set_i64_m128i(0, 1);
assert_eq!(<[i64; 2]>::from(a), <[i64; 2]>::from(b));