Back to index

glibc  2.9
fedisblxcpt.c
Go to the documentation of this file.
00001 /* Disable floating-point exceptions.
00002    Copyright (C) 2000 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004    Contributed by Andreas Jaeger <aj@suse.de>, 2000.
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 <fenv_libc.h>
00023 #include <fpu_control.h>
00024 
00025 int
00026 fedisableexcept (int excepts)
00027 {
00028   unsigned int new_exc, old_exc;
00029 
00030   /* Get the current control word.  */
00031   _FPU_GETCW (new_exc);
00032 
00033   old_exc = (new_exc & ENABLE_MASK) >> ENABLE_SHIFT;
00034 
00035   excepts &= FE_ALL_EXCEPT;
00036 
00037   new_exc &= ~(excepts << ENABLE_SHIFT);
00038   new_exc &= ~_FPU_RESERVED;
00039   _FPU_SETCW (new_exc);
00040 
00041   return old_exc;
00042 }