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5f72b005 | 1 | /* Set floating-point environment exception handling. |
04277e02 | 2 | Copyright (C) 2018-2019 Free Software Foundation, Inc. |
5f72b005 MH |
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 | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
5f72b005 MH |
18 | |
19 | #include <fenv.h> | |
20 | #include <fpu_control.h> | |
21 | #include <fenv_libc.h> | |
22 | ||
23 | int | |
24 | fesetexceptflag (const fexcept_t *flagp, int excepts) | |
25 | { | |
26 | fpu_control_t temp; | |
27 | ||
28 | /* Get the current exceptions. */ | |
29 | _FPU_GETFPSR (temp); | |
30 | ||
31 | /* Make sure the flags we want restored are legal. */ | |
32 | excepts &= FE_ALL_EXCEPT; | |
33 | ||
34 | /* Now clear the bits called for, and copy them in from flagp. Note that | |
35 | we ignore all non-flag bits from *flagp, so they don't matter. */ | |
36 | temp = ((temp >> CAUSE_SHIFT) & ~excepts) | (*flagp & excepts); | |
37 | temp = temp << CAUSE_SHIFT; | |
38 | ||
39 | _FPU_SETFPSR (temp); | |
40 | ||
41 | /* Success. */ | |
42 | return 0; | |
43 | } |