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a8c79c40 | 1 | /* Install given floating-point environment and raise exceptions. |
2b778ceb | 2 | Copyright (C) 1997-2021 Free Software Foundation, Inc. |
a8c79c40 | 3 | This file is part of the GNU C Library. |
a8c79c40 UD |
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 | |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
a8c79c40 UD |
18 | |
19 | #include <fenv.h> | |
20 | ||
21 | int | |
22 | __feupdateenv (const fenv_t *envp) | |
23 | { | |
24 | fexcept_t temp; | |
25 | unsigned int xtemp; | |
26 | ||
27 | /* Save current exceptions. */ | |
28 | __asm__ ("fnstsw %0\n\tstmxcsr %1" : "=m" (*&temp), "=m" (xtemp)); | |
29 | temp = (temp | xtemp) & FE_ALL_EXCEPT; | |
30 | ||
31 | /* Install new environment. */ | |
cd42798a | 32 | __fesetenv (envp); |
a8c79c40 UD |
33 | |
34 | /* Raise the saved exception. Incidently for us the implementation | |
35 | defined format of the values in objects of type fexcept_t is the | |
36 | same as the ones specified using the FE_* constants. */ | |
714fad23 | 37 | __feraiseexcept ((int) temp); |
a8c79c40 UD |
38 | |
39 | /* Success. */ | |
40 | return 0; | |
41 | } | |
42 | ||
43 | #include <shlib-compat.h> | |
44 | #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2) | |
45 | strong_alias (__feupdateenv, __old_feupdateenv) | |
46 | compat_symbol (libm, __old_feupdateenv, feupdateenv, GLIBC_2_1); | |
47 | #endif | |
48 | ||
8116321f | 49 | libm_hidden_def (__feupdateenv) |
9ff8d36f | 50 | libm_hidden_ver (__feupdateenv, feupdateenv) |
a8c79c40 | 51 | versioned_symbol (libm, __feupdateenv, feupdateenv, GLIBC_2_2); |