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glibc  2.9
fegetexcept.c
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00001 /* Get floating-point exceptions.
00002    Copyright (C) 2000, 2008 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004    Contributed by Geoffrey Keating <geoffk@geoffk.org>, 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 __fegetexcept (void)
00025 {
00026   fenv_union_t fe;
00027   int result = 0;
00028 
00029   fe.fenv = fegetenv_register ();
00030 
00031   if (fe.l[1] & (1 << (31 - FPSCR_XE)))
00032       result |= FE_INEXACT;
00033   if (fe.l[1] & (1 << (31 - FPSCR_ZE)))
00034       result |= FE_DIVBYZERO;
00035   if (fe.l[1] & (1 << (31 - FPSCR_UE)))
00036       result |= FE_UNDERFLOW;
00037   if (fe.l[1] & (1 << (31 - FPSCR_OE)))
00038       result |= FE_OVERFLOW;
00039   if (fe.l[1] & (1 << (31 - FPSCR_VE)))
00040       result |= FE_INVALID;
00041 
00042   return result;
00043 }
00044 weak_alias (__fegetexcept, fegetexcept)