1 /* Enable floating-point exceptions.
2 Copyright (C) 2001-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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/>. */
20 #include <fpu_control.h>
21 #include <arm-features.h>
25 feenableexcept (int excepts
)
27 fpu_control_t fpscr
, new_fpscr
, updated_fpscr
;
29 /* Fail if a VFP unit isn't present. */
34 excepts
&= FE_ALL_EXCEPT
;
35 new_fpscr
= fpscr
| (excepts
<< FE_EXCEPT_SHIFT
);
37 if (new_fpscr
!= fpscr
)
39 _FPU_SETCW (new_fpscr
);
41 /* Not all VFP architectures support trapping exceptions, so
42 test whether the relevant bits were set and fail if not. */
43 _FPU_GETCW (updated_fpscr
);
45 if (new_fpscr
& ~updated_fpscr
)
49 return (fpscr
>> FE_EXCEPT_SHIFT
) & FE_ALL_EXCEPT
;