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