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9969e62e | 1 | /* Install given floating-point control modes. PowerPC version. |
04277e02 | 2 | Copyright (C) 2016-2019 Free Software Foundation, Inc. |
9969e62e JM |
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/>. */ |
9969e62e JM |
18 | |
19 | #include <fenv_libc.h> | |
20 | #include <fpu_control.h> | |
21 | ||
9969e62e JM |
22 | int |
23 | fesetmode (const femode_t *modep) | |
24 | { | |
25 | fenv_union_t old, new; | |
26 | ||
27 | /* Logic regarding enabled exceptions as in fesetenv. */ | |
28 | ||
29 | new.fenv = *modep; | |
3c1766ea PC |
30 | old.fenv = fegetenv_status (); |
31 | new.l = (new.l & ~FPSCR_STATUS_MASK) | (old.l & FPSCR_STATUS_MASK); | |
9969e62e JM |
32 | |
33 | if (old.l == new.l) | |
34 | return 0; | |
35 | ||
3c1766ea | 36 | if ((old.l & FPSCR_ENABLES_MASK) == 0 && (new.l & FPSCR_ENABLES_MASK) != 0) |
9969e62e JM |
37 | (void) __fe_nomask_env_priv (); |
38 | ||
3c1766ea | 39 | if ((old.l & FPSCR_ENABLES_MASK) != 0 && (new.l & FPSCR_ENABLES_MASK) == 0) |
9969e62e JM |
40 | (void) __fe_mask_env (); |
41 | ||
3c1766ea | 42 | fesetenv_mode (new.fenv); |
9969e62e JM |
43 | return 0; |
44 | } |