Function safe_arch::sub_horizontal_i32_m128i

#[must_use]pub fn sub_horizontal_i32_m128i(a: m128i, b: m128i) -> m128i

This is supported with target feature ssse3 only.

Subtract horizontal pairs of i32 values, pack the outputs as a then b.

let a = m128i::from([1, 29, 3, 42]);
let b = m128i::from([5, 96, 7, 84]);
let c: [i32; 4] = sub_horizontal_i32_m128i(a, b).into();
assert_eq!(c, [-28, -39, -91, -77]);