295         if (Py_IS_NAN(x) || x > 0.0)  in m_tgamma()
397         if (Py_IS_NAN(x))  in m_lgamma()
556     if (Py_IS_NAN(x))  in m_erf()
578     if (Py_IS_NAN(x))  in m_erfc()
601     if (Py_IS_NAN(x) || Py_IS_NAN(y))  in m_atan2()
708     if (Py_IS_NAN(x)) {  in m_remainder()
711     if (Py_IS_NAN(y)) {  in m_remainder()
741     else if (Py_IS_NAN(x))  in m_log()
765         if (Py_IS_NAN(x))  in m_log2()
818     else if (Py_IS_NAN(x))  in m_log10()
1029     if (Py_IS_NAN(r) && !Py_IS_NAN(x)) {  in math_1_to_whatever()
1118     if (Py_IS_NAN(r)) {  in math_2()
1119         if (!Py_IS_NAN(x) && !Py_IS_NAN(y))  in math_2()
1489         if (Py_IS_NAN(inf_sum))  in math_fsum()
2177     if (Py_IS_NAN(x) || Py_IS_INFINITY(x) || !x) {  in math_frexp_impl()
2268         else if (Py_IS_NAN(x))  in math_modf_impl()
2421     if (Py_IS_NAN(r)) {  in math_fmod_impl()
2422         if (!Py_IS_NAN(x) && !Py_IS_NAN(y))  in math_fmod_impl()
2561         found_nan |= Py_IS_NAN(x);  in math_dist_impl()
2614         found_nan |= Py_IS_NAN(x);  in math_hypot()
2678         if (Py_IS_NAN(x))  in math_pow_impl()
2680         else if (Py_IS_NAN(y))  in math_pow_impl()
2712             if (Py_IS_NAN(r)) {  in math_pow_impl()
2803     return PyBool_FromLong((long)Py_IS_NAN(x));  in math_isnan_impl()
3412     if (Py_IS_NAN(x)) {  in math_ulp_impl()