206 #ifdef _GLIBCXX_LONG_DOUBLE_ALT128_COMPAT
  207 # if defined __LONG_DOUBLE_IEEE128__
  208   // long double is __ieee128, define traits for __ibm128
  209   template<>
  210   ¦ struct __numeric_traits_floating<__ibm128>
  211   ¦ {
  212   ¦ ¦ static const int __max_digits10 = 33;
  213   ¦ ¦ static const bool __is_signed = true;
  214   ¦ ¦ static const int __digits10 = 31;
  215   ¦ ¦ static const int __max_exponent10 = 308;
  216   ¦ };
  217   template<>
  218   ¦ struct __numeric_traits<__ibm128>
  219   ¦ : public __numeric_traits_floating<__ibm128>
  220   ¦ { };
  221 # elif defined __LONG_DOUBLE_IBM128__
  222   // long double is __ibm128, define traits for __ieee128
  223   template<>
  224   ¦ struct __numeric_traits_floating<__ieee128>
  225   ¦ {
  226   ¦ ¦ static const int __max_digits10 = 36;
  227   ¦ ¦ static const bool __is_signed = true;
  228   ¦ ¦ static const int __digits10 = 33;
  229   ¦ ¦ static const int __max_exponent10 = 4932;
  230   ¦ };
  231   template<>
  232   ¦ struct __numeric_traits<__ieee128>
  233   ¦ : public __numeric_traits_floating<__ieee128>
  234   ¦ { };
  235 # endif
  236 #endif