Function gmp_mpfr_sys::mpfr::mpfr_set_z_2exp

pub unsafe extern fn mpfr_set_z_2exp(arg1: mpfr_ptr,
                                     arg2: mpz_srcptr,
                                     arg3: mpfr_exp_t,
                                     arg4: mpfr_rnd_t)
                                     -> c_int