1/* Install given floating-point environment and raise exceptions.
2 Copyright (C) 1997-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <https://www.gnu.org/licenses/>. */
19
20#include <fenv.h>
21
22int
23__feupdateenv (const fenv_t *envp)
24{
25 fexcept_t temp;
26 unsigned int xtemp;
27
28 /* Save current exceptions. */
29 __asm__ ("fnstsw %0\n\tstmxcsr %1" : "=m" (*&temp), "=m" (xtemp));
30 temp = (temp | xtemp) & FE_ALL_EXCEPT;
31
32 /* Install new environment. */
33 __fesetenv (envp);
34
35 /* Raise the saved exception. Incidently for us the implementation
36 defined format of the values in objects of type fexcept_t is the
37 same as the ones specified using the FE_* constants. */
38 __feraiseexcept ((int) temp);
39
40 /* Success. */
41 return 0;
42}
43
44#include <shlib-compat.h>
45#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
46strong_alias (__feupdateenv, __old_feupdateenv)
47compat_symbol (libm, __old_feupdateenv, feupdateenv, GLIBC_2_1);
48#endif
49
50libm_hidden_def (__feupdateenv)
51libm_hidden_ver (__feupdateenv, feupdateenv)
52versioned_symbol (libm, __feupdateenv, feupdateenv, GLIBC_2_2);
53