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glibc  2.9
fedisblxcpt.c
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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 Jakub Jelinek <jakub@redhat.com>, 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_libc.h>
00022 
00023 int
00024 fedisableexcept (int excepts)
00025 {
00026   unsigned long int new_exc, old_exc;
00027 
00028   new_exc = __ieee_get_fp_control ();
00029 
00030   old_exc = (new_exc & SWCR_ENABLE_MASK) << SWCR_ENABLE_SHIFT;
00031   new_exc &= ~((excepts >> SWCR_ENABLE_SHIFT) & SWCR_ENABLE_MASK);
00032 
00033   __ieee_set_fp_control (new_exc);
00034 
00035   return old_exc;
00036 }