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glibc  2.9
feholdexcpt.c
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00001 /* Store current floating-point environment and clear exceptions.
00002    Copyright (C) 1997, 1998, 2005, 2007 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #include <fenv.h>
00021 
00022 int
00023 feholdexcept (fenv_t *envp)
00024 {
00025   fenv_t tmp;
00026 
00027   __fenv_stfsr (*envp);
00028 
00029   /* Set all exceptions to non-stop and clear all exceptions.  */
00030   tmp = *envp & ~((0x1f << 23) | FE_ALL_EXCEPT);
00031 
00032   __fenv_ldfsr (tmp);
00033 
00034   return 0;
00035 }
00036 libm_hidden_def (feholdexcept)