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glibc  2.9
fsetexcptflg.c
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00001 /* Set floating-point environment exception handling.
00002    Copyright (C) 1998, 1999, 2000, 2002 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004    Contributed by Hartvig Ekner <hartvige@mips.com>, 2002.
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 #include <fpu_control.h>
00023 
00024 int
00025 fesetexceptflag (const fexcept_t *flagp, int excepts)
00026 {
00027   fpu_control_t temp;
00028 
00029   /* Get the current exceptions.  */
00030   _FPU_GETCW (temp);
00031 
00032   /* Make sure the flags we want restored are legal.  */
00033   excepts &= FE_ALL_EXCEPT;
00034 
00035   /* Now clear the bits called for, and copy them in from flagp. Note that
00036      we ignore all non-flag bits from *flagp, so they don't matter.  */
00037   temp = (temp & ~excepts) | (*flagp & excepts);
00038 
00039   _FPU_SETCW (temp);
00040 
00041   /* Success.  */
00042   return 0;
00043 }