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1f205a47 | 1 | /* Store current floating-point environment and clear exceptions. |
581c785b | 2 | Copyright (C) 1997-2022 Free Software Foundation, Inc. |
1f205a47 UD |
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 | |
41bdb6e2 AJ |
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. | |
1f205a47 UD |
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 | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
1f205a47 | 14 | |
41bdb6e2 | 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/>. */ |
1f205a47 UD |
18 | |
19 | #include <fenv_libc.h> | |
edba7a54 | 20 | #include <fpu_control.h> |
1f205a47 UD |
21 | |
22 | int | |
ef9faf13 | 23 | __feholdexcept (fenv_t *envp) |
1f205a47 | 24 | { |
4a59e9ad | 25 | fenv_union_t old, new; |
1f205a47 | 26 | |
4a59e9ad UD |
27 | /* Save the currently set exceptions. */ |
28 | old.fenv = *envp = fegetenv_register (); | |
1f205a47 | 29 | |
4a59e9ad | 30 | /* Clear everything except for the rounding modes and non-IEEE arithmetic |
1f205a47 | 31 | flag. */ |
4a28b3ca | 32 | new.l = old.l & 0xffffffff00000007LL; |
9c84384c | 33 | |
18f2945a AZ |
34 | if (new.l == old.l) |
35 | return 0; | |
36 | ||
e3d85df5 | 37 | __TEST_AND_ENTER_NON_STOP (old.l, 0ULL); |
1f205a47 UD |
38 | |
39 | /* Put the new state in effect. */ | |
4a59e9ad | 40 | fesetenv_register (new.fenv); |
1f205a47 | 41 | |
8a94dfe4 | 42 | return 0; |
1f205a47 | 43 | } |
ef9faf13 JM |
44 | libm_hidden_def (__feholdexcept) |
45 | weak_alias (__feholdexcept, feholdexcept) | |
46 | libm_hidden_weak (feholdexcept) |