1 /* Enable floating-point exceptions.
2 Copyright (C) 2000-2025 Free Software Foundation, Inc.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library. If not, see
16 <https://www.gnu.org/licenses/>. */
17
18 #include <fenv.h>
19
20 int
feenableexcept(int excepts)21 feenableexcept (int excepts)
22 {
23 unsigned int new_exc, old_exc;
24
25 /* Get the current control register contents. */
26 __asm__ ("fmove%.l %!,%0" : "=dm" (new_exc));
27
28 old_exc = (new_exc >> 6) & FE_ALL_EXCEPT;
29
30 excepts &= FE_ALL_EXCEPT;
31
32 new_exc |= excepts << 6;
33 __asm__ ("fmove%.l %0,%!" : : "dm" (new_exc));
34
35 return old_exc;
36 }
37