]>
Commit | Line | Data |
---|---|---|
05ef7ce9 | 1 | /* Enable floating-point exceptions. |
ad04a62f | 2 | Copyright (C) 1999, 2000 Free Software Foundation, Inc. |
05ef7ce9 UD |
3 | This file is part of the GNU C Library. |
4 | Contributed by Andreas Jaeger <aj@suse.de>, 1999. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
05ef7ce9 UD |
10 | |
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 14 | Lesser General Public License for more details. |
05ef7ce9 | 15 | |
41bdb6e2 AJ |
16 | You should have received a copy of the GNU Lesser General Public |
17 | License along with the GNU C Library; if not, write to the Free | |
18 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
19 | 02111-1307 USA. */ | |
05ef7ce9 UD |
20 | |
21 | #include <fenv.h> | |
22 | ||
23 | int | |
24 | feenableexcept (int excepts) | |
25 | { | |
26 | unsigned short int new_exc, old_exc; | |
27 | ||
28 | /* Get the current control word. */ | |
29 | __asm__ ("fstcw %0" : "=m" (*&new_exc)); | |
30 | ||
31 | excepts &= FE_ALL_EXCEPT; | |
522554b1 | 32 | old_exc = (~new_exc) & FE_ALL_EXCEPT; |
05ef7ce9 | 33 | |
ad04a62f | 34 | new_exc &= ~excepts; |
05ef7ce9 UD |
35 | __asm__ ("fldcw %0" : : "m" (*&new_exc)); |
36 | ||
37 | return old_exc; | |
38 | } |