blob: c3ea0df38d954d31cc5a7436164eacb4a7899ca2 (
plain)
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
|
/* Enable floating-point exceptions.
Copyright (C) 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Geoffrey Keating <geoffk@geoffk.org>, 2000.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <fenv_libc.h>
int
feenableexcept (int excepts)
{
fenv_union_t fe;
int result, new;
result = fegetexcept ();
if ((excepts & FE_ALL_INVALID) == FE_ALL_INVALID)
excepts = (excepts | FE_INVALID) & ~ FE_ALL_INVALID;
fe.fenv = fegetenv_register ();
if (excepts & FE_INEXACT)
fe.l[1] |= (1 << (31 - FPSCR_XE));
if (excepts & FE_DIVBYZERO)
fe.l[1] |= (1 << (31 - FPSCR_ZE));
if (excepts & FE_UNDERFLOW)
fe.l[1] |= (1 << (31 - FPSCR_UE));
if (excepts & FE_OVERFLOW)
fe.l[1] |= (1 << (31 - FPSCR_OE));
if (excepts & FE_INVALID)
fe.l[1] |= (1 << (31 - FPSCR_VE));
fesetenv_register (fe.fenv);
new = fegetexcept ();
if (new != 0 && result == 0)
(void)__fe_nomask_env ();
if ((new & excepts) != excepts)
result = -1;
return result;
}
|
