old-autovect-branch/libstdc++-v3/testsuite/18_support/numeric_limits/is_iec559.cc

   1 // { dg-options "-mieee" { target alpha*-*-* } }
   2 // { dg-options "-mieee" { target sh*-*-* } }
   3
   4 // 1999-08-23 bkoz
   5
   6 // Copyright (C) 1999, 2001, 2002, 2003, 2004 Free Software Foundation
   7 //
   8 // This file is part of the GNU ISO C++ Library.  This library is free
   9 // software; you can redistribute it and/or modify it under the
  10 // terms of the GNU General Public License as published by the
  11 // Free Software Foundation; either version 2, or (at your option)
  12 // any later version.
  13
  14 // This library is distributed in the hope that it will be useful,
  15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 // GNU General Public License for more details.
  18
  19 // You should have received a copy of the GNU General Public License along
  20 // with this library; see the file COPYING.  If not, write to the Free
  21 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  22 // USA.
  23
  24 // 18.2.1.1 template class numeric_limits
  25
  26 #include <limits>
  27 #include <limits.h>
  28 #include <float.h>
  29 #include <cwchar>
  30 #include <testsuite_hooks.h>
  31
  32 template<typename T>
  33 void
  34 test_is_iec559()
  35 {
  36   bool test;
  37
  38   if (std::numeric_limits<T>::is_iec559)
  39     {
  40       // IEC 559 requires all of the following.
  41       test = (std::numeric_limits<T>::has_infinity
  42               && std::numeric_limits<T>::has_quiet_NaN
  43               && std::numeric_limits<T>::has_signaling_NaN);
  44     }
  45   else
  46     {
  47       // If we had all of the following, why didn't we set IEC 559?
  48       test = (!std::numeric_limits<T>::has_infinity
  49               || !std::numeric_limits<T>::has_quiet_NaN
  50               || !std::numeric_limits<T>::has_signaling_NaN);
  51     }
  52
  53   VERIFY (test);
  54 }
  55
  56 // libstdc++/8949
  57 bool test04()
  58 {
  59   bool test __attribute__((unused)) = true;
  60
  61   VERIFY( !std::numeric_limits<short>::is_iec559 );
  62   VERIFY( !std::numeric_limits<unsigned short>::is_iec559 );
  63   VERIFY( !std::numeric_limits<int>::is_iec559 );
  64   VERIFY( !std::numeric_limits<unsigned int>::is_iec559 );
  65   VERIFY( !std::numeric_limits<long>::is_iec559 );
  66   VERIFY( !std::numeric_limits<unsigned long>::is_iec559 );
  67   VERIFY( !std::numeric_limits<long long>::is_iec559 );
  68   VERIFY( !std::numeric_limits<unsigned long long>::is_iec559 );
  69   return test;
  70 }
  71
  72 int main()
  73 {
  74   test_is_iec559<float>();
  75   test_is_iec559<double>();
  76   test_is_iec559<long double>();
  77
  78   test04();
  79
  80   return 0;
  81 }