Function vaddss 

unsafe extern "C" fn vaddss(
    a: Simd<f32, 4>,
    b: Simd<f32, 4>,
    src: Simd<f32, 4>,
    mask: u8,
    rounding: i32,
) -> Simd<f32, 4>

Available on x86 or x86-64 only.