Function antic::_fmpq_mul_small

pub unsafe extern "C" fn _fmpq_mul_small(
    rnum: *mut fmpz, 
    rden: *mut fmpz, 
    p1: mp_limb_signed_t, 
    q1: mp_limb_t, 
    p2: mp_limb_signed_t, 
    q2: mp_limb_t
)