sysdeps/x86/fpu/include/bits/fenv.h

   1 /* Wrapper for x86 bits/fenv.h for use when building glibc.
   2    Copyright (C) 1997-2014 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include_next <bits/fenv.h>
  20
  21 /* Ensure __feraiseexcept calls in glibc are optimized the same as
  22    feraiseexcept calls.  */
  23
  24 #ifdef __USE_EXTERN_INLINES
  25 __BEGIN_DECLS
  26
  27 extern int __REDIRECT_NTH (____feraiseexcept_renamed, (int), __feraiseexcept);
  28 __extern_inline int
  29 __NTH (__feraiseexcept (int __excepts))
  30 {
  31   if (__builtin_constant_p (__excepts)
  32       && (__excepts & ~(FE_INVALID | FE_DIVBYZERO)) == 0)
  33     {
  34       __feraiseexcept_invalid_divbyzero (__excepts);
  35       return 0;
  36     }
  37
  38   return ____feraiseexcept_renamed (__excepts);
  39 }
  40
  41 __END_DECLS
  42 #endif