Function safe_arch::shr_all_i16_m128i

#[must_use]pub fn shr_all_i16_m128i(a: m128i, count: m128i) -> m128i

This is supported with target feature sse2 only.

Shift each i16 lane to the right by the count in the lower i64 lane.

New bits are the sign bit.

let a = m128i::from([1_i16, 2, 3, 4, -1, -2, -3, -4]);
let b = m128i::from([3_i64, 0]);
let c: [i16; 8] = shr_all_i16_m128i(a, b).into();
assert_eq!(
  c,
  [1_i16 >> 3, 2 >> 3, 3 >> 3, 4 >> 3, -1 >> 3, -2 >> 3, -3 >> 3, -4 >> 3]
);