Macro safe_arch::shift_left_i16_immediate_m128i

macro_rules! shift_left_i16_immediate_m128i {
    ($a:expr, $imm:expr) => { ... };
}

Shifts all i16 lanes left by an immediate.

let a = m128i::from([1_i16, 2, 3, 4, -1, -2, -3, -4]);
let c: [i16; 8] = shift_left_i16_immediate_m128i!(a, 3).into();
assert_eq!(
  c,
  [1_i16 << 3, 2 << 3, 3 << 3, 4 << 3, -1 << 3, -2 << 3, -3 << 3, -4 << 3]
);