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

   1 /* Wrapper for x86 bits/fenv.h for use when building glibc.
   2    Copyright (C) 1997-2019 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 #ifndef _BITS_FENV_H
  20
  21 #if defined _LIBC && defined __USE_EXTERN_INLINES
  22 # if defined SHARED && !defined NO_HIDDEN && IS_IN (libm)
  23 extern int __REDIRECT_NTH (__feraiseexcept_renamed, (int), __GI_feraiseexcept);
  24 # else
  25 extern int __REDIRECT_NTH (__feraiseexcept_renamed, (int), feraiseexcept);
  26 # endif
  27 #endif
  28
  29 #include_next <bits/fenv.h>
  30
  31 # ifndef _ISOMAC
  32
  33 /* Ensure __feraiseexcept calls in glibc are optimized the same as
  34    feraiseexcept calls.  */
  35
  36 #ifdef __USE_EXTERN_INLINES
  37 __BEGIN_DECLS
  38
  39 extern int __REDIRECT_NTH (____feraiseexcept_renamed, (int), __feraiseexcept);
  40 __extern_inline int
  41 __NTH (__feraiseexcept (int __excepts))
  42 {
  43   if (__builtin_constant_p (__excepts)
  44       && (__excepts & ~(FE_INVALID | FE_DIVBYZERO)) == 0)
  45     {
  46       __feraiseexcept_invalid_divbyzero (__excepts);
  47       return 0;
  48     }
  49
  50   return ____feraiseexcept_renamed (__excepts);
  51 }
  52
  53 __END_DECLS
  54 #endif
  55
  56 # endif /* _ISOMAC */
  57 #endif /* bits/fenv.h */