]>
Commit | Line | Data |
---|---|---|
297c592e | 1 | /* Install given floating-point control modes. Alpha version. |
2b778ceb | 2 | Copyright (C) 2016-2021 Free Software Foundation, Inc. |
297c592e 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/>. */ |
297c592e JM |
18 | |
19 | #include <fenv_libc.h> | |
20 | ||
21 | int | |
22 | fesetmode (const femode_t *modep) | |
23 | { | |
24 | unsigned long int fpcr; | |
25 | unsigned long int swcr; | |
26 | femode_t mode; | |
27 | ||
28 | /* As in fesetenv. */ | |
29 | if ((long int) modep >= 0) | |
30 | mode = *modep; | |
31 | else | |
32 | mode = (unsigned long int) modep; | |
33 | ||
34 | __asm__ __volatile__ ("excb; mf_fpcr %0" : "=f" (fpcr)); | |
35 | fpcr = (fpcr & ~FPCR_ROUND_MASK) | (mode & FPCR_ROUND_MASK); | |
36 | __asm__ __volatile__ ("mt_fpcr %0" : : "f" (fpcr)); | |
37 | ||
38 | swcr = __ieee_get_fp_control (); | |
39 | swcr = ((mode & SWCR_ALL_MASK & ~SWCR_STATUS_MASK) | |
40 | | (swcr & SWCR_STATUS_MASK)); | |
41 | __ieee_set_fp_control (swcr); | |
42 | ||
43 | return 0; | |
44 | } |