1 | /* Store current floating-point environment. |
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_libc.h> |
20 | |
21 | int |
22 | __fegetenv (fenv_t *envp) |
23 | { |
24 | unsigned long int fpcr; |
25 | unsigned long int swcr; |
26 | |
27 | /* Get status from software and hardware. Note that we don't need an |
28 | excb because the callsys is an implied trap barrier. */ |
29 | swcr = __ieee_get_fp_control (); |
30 | __asm__ __volatile__ ("mf_fpcr %0" : "=f" (fpcr)); |
31 | |
32 | /* Merge the two bits of information. */ |
33 | *envp = ((fpcr & FPCR_ROUND_MASK) | (swcr & SWCR_ALL_MASK)); |
34 | |
35 | /* Success. */ |
36 | return 0; |
37 | } |
38 | |
39 | #include <shlib-compat.h> |
40 | #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2) |
41 | strong_alias (__fegetenv, __old_fegetenv) |
42 | compat_symbol (libm, __old_fegetenv, fegetenv, GLIBC_2_1); |
43 | #endif |
44 | |
45 | libm_hidden_def (__fegetenv) |
46 | versioned_symbol (libm, __fegetenv, fegetenv, GLIBC_2_2); |
47 | libm_hidden_ver(__fegetenv, fegetenv) |
48 | |