Function gmp_mpfr_sys::gmp::mpn_add

pub unsafe extern "C" fn mpn_add(
    rp: *mut limb_t,
    s1p: *const limb_t,
    s1n: size_t,
    s2p: *const limb_t,
    s2n: size_t
) -> limb_t

See: mpn_add