1 /* Get enabled 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
fegetexcept(void)22 fegetexcept (void)
23 {
24 union { unsigned long long l; unsigned int sw[2]; } s;
25
26 /* Get the current status word. */
27 __asm__ ("fstd %%fr0,0(%1) \n\t"
28 "fldd 0(%1),%%fr0 \n\t"
29 : "=m" (s.l) : "r" (&s.l) : "%r0");
30
31 return (s.sw[0] & FE_ALL_EXCEPT);
32 }
33