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
|
/* Raise given exceptions, given the SPEFSCR bits for those exceptions.
Copyright (C) 1997-2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <fenv_libc.h>
int
__FERAISEEXCEPT_INTERNAL (int excepts)
{
unsigned long f;
f = fegetenv_register ();
f |= (excepts & SPEFSCR_ALL_EXCEPT);
fesetenv_register (f);
/* Force the operations that cause the exceptions. */
if ((SPEFSCR_FINVS & excepts) != 0)
/* 0 / 0 */
asm volatile ("efsdiv %0,%0,%1" : : "r" (0), "r" (0));
if ((SPEFSCR_FDBZS & excepts) != 0)
/* 1.0 / 0.0 */
asm volatile ("efsdiv %0,%0,%1" : : "r" (1.0F), "r" (0));
if ((SPEFSCR_FOVFS & excepts) != 0)
/* Largest normalized number plus itself. */
asm volatile ("efsadd %0,%0,%1" : : "r" (0x7f7fffff), "r" (0x7f7fffff));
if ((SPEFSCR_FUNFS & excepts) != 0)
/* Smallest normalized number times itself. */
asm volatile ("efsmul %0,%0,%1" : : "r" (0x800000), "r" (0x800000));
if ((SPEFSCR_FINXS & excepts) != 0)
/* Smallest normalized minus 1.0 raises the inexact flag. */
asm volatile ("efssub %0,%0,%1" : : "r" (0x00800000), "r" (1.0F));
/* Success. */
return 0;
}
|
