Function safe_arch::shl_i64_m128i

#[must_use]pub fn shl_i64_m128i(a: m128i, count: m128i) -> m128i

This is supported with target feature sse2 only.

Shift each i64 lane to the left by the count in the lower i64 lane.

New bits are 0s.

let a = m128i::from([1_i64, -2]);
let b = m128i::from([3_i64, 0]);
let c: [i64; 2] = shl_i64_m128i(a, b).into();
assert_eq!(c, [1 << 3, -2 << 3]);