Function guile_sys::__gmpn_sub

pub unsafe extern "C" fn __gmpn_sub(
    __gmp_wp: mp_ptr, 
    __gmp_xp: mp_srcptr, 
    __gmp_xsize: mp_size_t, 
    __gmp_yp: mp_srcptr, 
    __gmp_ysize: mp_size_t
) -> mp_limb_t