blob: 250b47aac3cedfa2c84846e5723a75ed86d6e880 (
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
|
/* Install given floating-point environment and raise exceptions.
Copyright (C) 1997,99,2000,01,07 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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.h>
#include <unistd.h>
libm_hidden_proto(fesetenv)
libm_hidden_proto(feraiseexcept)
int
feupdateenv (const fenv_t *envp)
{
fexcept_t temp;
/* unsigned int xtemp = 0; */
/* Save current exceptions. */
__asm__ ("fnstsw %0" : "=m" (*&temp));
#if 0
/* If the CPU supports SSE we test the MXCSR as well. */
if ((GLRO(dl_hwcap) & HWCAP_I386_XMM) != 0)
__asm__ ("stmxcsr %0" : "=m" (*&xtemp));
temp = (temp | xtemp) & FE_ALL_EXCEPT;
#else
temp &= FE_ALL_EXCEPT;
#endif
/* Install new environment. */
fesetenv (envp);
/* Raise the saved exception. Incidently for us the implementation
defined format of the values in objects of type fexcept_t is the
same as the ones specified using the FE_* constants. */
feraiseexcept ((int) temp);
/* Success. */
return 0;
}
|
