libstdc++-v3/testsuite/26_numerics/headers/cmath/60637.cc

   1 // Copyright (C) 2016-2019 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-options "-std=gnu++98 -ffast-math" }
  19 // { dg-do run { target i?86-*-* x86_64-*-* } }
  20
  21 #include <cmath>
  22 #include <testsuite_hooks.h>
  23
  24 void
  25 test01()
  26 {
  27   long double ld = -5.3165867831218916301793863361917824e-2467L;
  28   VERIFY( std::signbit(ld) == 1 );
  29 }
  30
  31 int
  32 main()
  33 {
  34   test01();
  35 }