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glibc  2.9
fsetexcptflg.c
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00001 /* Set floating-point environment exception handling.
00002    Copyright (C) 1997, 1998, 2000 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 #include <math.h>
00022 #include <fpu_control.h>
00023 
00024 int
00025 fesetexceptflag (const fexcept_t *flagp, int excepts)
00026 {
00027   fexcept_t temp;
00028 
00029   /* Get the current environment.  */
00030   _FPU_GETCW (temp);
00031 
00032   /* Set the desired exception mask.  */
00033   temp &= ~(excepts & FE_ALL_EXCEPT);
00034   temp |= (*flagp & excepts & FE_ALL_EXCEPT);
00035 
00036   /* Save state back to the FPU.  */
00037   _FPU_SETCW (temp);
00038 
00039   return 0;
00040 }