sysdeps/arm/eabi/feupdateenv.c

   1 /* Install given floating-point environment and raise exceptions.
   2    Copyright (C) 1997, 1999, 2000, 2008, 2010 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library.  If not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <fenv.h>
  21 #include <fpu_control.h>
  22
  23 #include <unistd.h>
  24 #include <ldsodefs.h>
  25 #include <dl-procinfo.h>
  26 #include <sysdep.h>
  27
  28 int
  29 __feupdateenv (const fenv_t *envp)
  30 {
  31   if (GLRO (dl_hwcap) & HWCAP_ARM_VFP)
  32     {
  33       unsigned int temp;
  34
  35       /* Get the current exception state.  */
  36       _FPU_GETCW (temp);
  37
  38       /* Install new environment.  */
  39       fesetenv (envp);
  40
  41       /* Raise the saved exceptions.  */
  42       feraiseexcept (temp & FE_ALL_EXCEPT);
  43
  44       /* Success.  */
  45       return 0;
  46     }
  47
  48   /* Unsupported, so fail.  */
  49   return 1;
  50 }
  51
  52 #include <shlib-compat.h>
  53 #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
  54 strong_alias (__feupdateenv, __old_feupdateenv)
  55 compat_symbol (libm, __old_feupdateenv, feupdateenv, GLIBC_2_1);
  56 #endif
  57
  58 libm_hidden_ver (__feupdateenv, feupdateenv)
  59 versioned_symbol (libm, __feupdateenv, feupdateenv, GLIBC_2_2);