1 /* Install given 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.h>
20 #include <fenv_private.h>
21 #include <shlib-compat.h>
22
23 int
__fesetenv(const fenv_t * envp)24 __fesetenv (const fenv_t *envp)
25 {
26 fenv_t dummy;
27
28 /* Put these constants in memory explicitly, so as to cope with a
29 -fPIC bug as of gcc 970624. Making them automatic is quicker
30 than loading up the pic register in this instance. */
31
32 if (envp == FE_DFL_ENV)
33 {
34 dummy = 0;
35 envp = &dummy;
36 }
37 else if (envp == FE_NOMASK_ENV)
38 {
39 dummy = 0x1f << 23;
40 envp = &dummy;
41 }
42
43 __fenv_ldfsr (*envp);
44
45 /* Success. */
46 return 0;
47 }
48
49 #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
50 strong_alias (__fesetenv, __old_fesetenv)
51 compat_symbol (libm, __old_fesetenv, fesetenv, GLIBC_2_1);
52 #endif
53
54 libm_hidden_def (__fesetenv)
55 libm_hidden_ver (__fesetenv, fesetenv)
56 versioned_symbol (libm, __fesetenv, fesetenv, GLIBC_2_2);
57