1 | /* Store current representation for exceptions. |
2 | Copyright (C) 1997-2022 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 | #include <unistd.h> |
21 | #include <ldsodefs.h> |
22 | #include <dl-procinfo.h> |
23 | |
24 | |
25 | int |
26 | __fegetexceptflag (fexcept_t *flagp, int excepts) |
27 | { |
28 | fexcept_t temp; |
29 | |
30 | /* Get the current exceptions. */ |
31 | __asm__ ("fnstsw %0" : "=m" (*&temp)); |
32 | |
33 | *flagp = temp & excepts & FE_ALL_EXCEPT; |
34 | |
35 | /* If the CPU supports SSE, we clear the MXCSR as well. */ |
36 | if (CPU_FEATURE_USABLE (SSE)) |
37 | { |
38 | unsigned int sse_exc; |
39 | |
40 | /* Get the current MXCSR. */ |
41 | __asm__ ("stmxcsr %0" : "=m" (*&sse_exc)); |
42 | |
43 | *flagp |= sse_exc & excepts & FE_ALL_EXCEPT; |
44 | } |
45 | |
46 | /* Success. */ |
47 | return 0; |
48 | } |
49 | |
50 | #include <shlib-compat.h> |
51 | #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2) |
52 | strong_alias (__fegetexceptflag, __old_fegetexceptflag) |
53 | compat_symbol (libm, __old_fegetexceptflag, fegetexceptflag, GLIBC_2_1); |
54 | #endif |
55 | |
56 | versioned_symbol (libm, __fegetexceptflag, fegetexceptflag, GLIBC_2_2); |
57 | |