pub unsafe extern "C" fn mpoly_unpack_monomials_tight(
    e1: *mut mp_limb_t,
    e2: *mut mp_limb_t,
    len: mp_limb_signed_t,
    mults: *mut mp_limb_signed_t,
    num: mp_limb_signed_t,
    bits: mp_limb_signed_t
)