1/* Copyright (C) 2012-2015 Free Software Foundation, Inc.
2
3   This file is part of the GNU Atomic Library (libatomic).
4
5   Libatomic is free software; you can redistribute it and/or modify it
6   under the terms of the GNU General Public License as published by
7   the Free Software Foundation; either version 3 of the License, or
8   (at your option) any later version.
9
10   Libatomic is distributed in the hope that it will be useful, but WITHOUT ANY
11   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
12   FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
13   more details.
14
15   Under Section 7 of GPL version 3, you are granted additional
16   permissions described in the GCC Runtime Library Exception, version
17   3.1, as published by the Free Software Foundation.
18
19   You should have received a copy of the GNU General Public License and
20   a copy of the GCC Runtime Library Exception along with this program;
21   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
22   <http://www.gnu.org/licenses/>.  */
23
24#include "libatomic_i.h"
25
26#ifdef HAVE_FENV_H
27# include <fenv.h>
28#endif
29
30/* Raise the supported floating-point exceptions from EXCEPTS.  Other
31   bits in EXCEPTS are ignored.  */
32
33void
34__atomic_feraiseexcept (int excepts __attribute__ ((unused)))
35{
36  volatile float r __attribute__ ((unused));
37#ifdef FE_INVALID
38  if (excepts & FE_INVALID)
39  {
40    volatile float zero = 0.0f;
41    r = zero / zero;
42  }
43#endif
44#ifdef FE_DIVBYZERO
45  if (excepts & FE_DIVBYZERO)
46    {
47      volatile float zero = 0.0f;
48      r = 1.0f / zero;
49    }
50#endif
51#ifdef FE_OVERFLOW
52  if (excepts & FE_OVERFLOW)
53    {
54      volatile float max = __FLT_MAX__;
55      r = max * max;
56    }
57#endif
58#ifdef FE_UNDERFLOW
59  if (excepts & FE_UNDERFLOW)
60    {
61      volatile float min = __FLT_MIN__;
62      r = min * min;
63    }
64#endif
65#ifdef FE_INEXACT
66  if (excepts & FE_INEXACT)
67    {
68      volatile float three = 3.0f;
69      r = 1.0f / three;
70    }
71#endif
72}
73