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glibc  2.9
feupdateenv.c
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00001 /* Install given floating-point environment and raise exceptions.
00002    Copyright (C) 1997, 2000, 2007 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004    Contributed by Christian Boissat <Christian.Boissat@cern.ch>, 1999.
00005 
00006    The GNU C Library is free software; you can redistribute it and/or
00007    modify it under the terms of the GNU Lesser General Public
00008    License as published by the Free Software Foundation; either
00009    version 2.1 of the License, or (at your option) any later version.
00010 
00011    The GNU C Library is distributed in the hope that it will be useful,
00012    but WITHOUT ANY WARRANTY; without even the implied warranty of
00013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014    Lesser General Public License for more details.
00015 
00016    You should have received a copy of the GNU Lesser General Public
00017    License along with the GNU C Library; if not, write to the Free
00018    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00019    02111-1307 USA.  */
00020 
00021 #include <fenv.h>
00022 
00023 int
00024 feupdateenv (const fenv_t *envp)
00025 {
00026   fenv_t fpsr;
00027 
00028 
00029   /* Get the current exception state.  */
00030   __asm__ __volatile__ ("mov.m %0=ar.fpsr" : "=r" (fpsr));
00031 
00032   /* Install new environment.  */
00033   fesetenv (envp);
00034 
00035   /* Raise the saved exceptions.  */
00036   feraiseexcept ((int) (fpsr >> 13) & FE_ALL_EXCEPT);
00037 
00038   /* Success.  */
00039   return 0;
00040 }