blob: ff00e2f9b7b80344e992b513e937ff476ba9502c (
plain) (
blame)
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
|
/* Store current floating-point environment and clear exceptions.
Copyright (C) 1997-2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
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>
int
__feholdexcept (fenv_t *envp)
{
fexcept_t fpcr, fpsr;
/* Store the environment. */
#ifdef __mcoldfire__
__asm__ ("fmove%.l %/fpcr,%0" : "=dm" (envp->__control_register));
__asm__ ("fmove%.l %/fpsr,%0" : "=dm" (envp->__status_register));
__asm__ ("fmove%.l %/fpiar,%0" : "=dm" (envp->__instruction_address));
#else
__asm__ ("fmovem%.l %/fpcr/%/fpsr/%/fpiar,%0" : "=m" (*envp));
#endif
/* Now clear all exceptions. */
fpsr = envp->__status_register & ~FE_ALL_EXCEPT;
__asm__ __volatile__ ("fmove%.l %0,%/fpsr" : : "dm" (fpsr));
/* And set all exceptions to non-stop. */
fpcr = envp->__control_register & ~(FE_ALL_EXCEPT << 6);
__asm__ __volatile__ ("fmove%.l %0,%!" : : "dm" (fpcr));
return 0;
}
libm_hidden_def (__feholdexcept)
weak_alias (__feholdexcept, feholdexcept)
libm_hidden_weak (feholdexcept)
|
