1 /* Enable floating-point exceptions.
2 Copyright (C) 2000-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library. If not, see
17 <https://www.gnu.org/licenses/>. */
18
19 #include <fenv.h>
20
21 int
feenableexcept(int excepts)22 feenableexcept (int excepts)
23 {
24 unsigned int new_exc, old_exc;
25
26 /* Get the current control register contents. */
27 __asm__ ("fmove%.l %!,%0" : "=dm" (new_exc));
28
29 old_exc = (new_exc >> 6) & FE_ALL_EXCEPT;
30
31 excepts &= FE_ALL_EXCEPT;
32
33 new_exc |= excepts << 6;
34 __asm__ ("fmove%.l %0,%!" : : "dm" (new_exc));
35
36 return old_exc;
37 }
38