Function vgetmantss 

unsafe extern "C" fn vgetmantss(
    a: Simd<f32, 4>,
    b: Simd<f32, 4>,
    mantissas: i32,
    src: Simd<f32, 4>,
    m: u8,
    sae: i32,
) -> Simd<f32, 4>

Available on x86 or x86-64 only.