Function safe_arch::test_all_ones_m128i

#[must_use]pub fn test_all_ones_m128i(a: m128i) -> i32

This is supported with target feature sse4.1 only.

Tests if all bits are 1.

let a = m128i::from(0_u128);
let b = m128i::from(u128::MAX);
assert_eq!(test_all_ones_m128i(a), 0);
assert_eq!(test_all_ones_m128i(b), 1);