fmaximum_mag_num
double fmaximum_mag_num(double, double);
__weak_reference(fmaximum_mag_num, fmaximum_mag_numl);
TEST(fmaximum_mag_num, double, big, small, expected_max_mag_num, rmode);
TEST(fmaximum_mag_num, double, small, big, expected_max_mag_num, rmode);