1 | /* Set current rounding direction. |
2 | Copyright (C) 1998-2024 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 <fpu_control.h> |
21 | |
22 | int |
23 | __fesetround (int round) |
24 | { |
25 | fpu_control_t cw; |
26 | |
27 | if ((round & ~0x1) != 0) |
28 | /* ROUND is no valid rounding mode. */ |
29 | return 1; |
30 | |
31 | /* Get current state. */ |
32 | _FPU_GETCW (cw); |
33 | |
34 | /* Set rounding bits. */ |
35 | cw &= ~0x1; |
36 | cw |= round; |
37 | /* Set new state. */ |
38 | _FPU_SETCW (cw); |
39 | |
40 | return 0; |
41 | } |
42 | libm_hidden_def (__fesetround) |
43 | weak_alias (__fesetround, fesetround) |
44 | libm_hidden_weak (fesetround) |
45 | |