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deb5c024 | 1 | /* Set current rounding direction. |
d4697bc9 | 2 | Copyright (C) 1998-2014 Free Software Foundation, Inc. |
deb5c024 UD |
3 | This file is part of the GNU C Library. |
4 | Contributed by Andreas Jaeger <aj@arthur.rhein-neckar.de>, 1998. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
3214b89b AJ |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
deb5c024 UD |
10 | |
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
3214b89b | 14 | Lesser General Public License for more details. |
deb5c024 | 15 | |
3214b89b | 16 | You should have received a copy of the GNU Lesser General Public |
ab84e3ff PE |
17 | License along with the GNU C Library. If not, see |
18 | <http://www.gnu.org/licenses/>. */ | |
deb5c024 UD |
19 | |
20 | #include <fenv.h> | |
21 | #include <fpu_control.h> | |
22 | ||
23 | int | |
24 | fesetround (int round) | |
25 | { | |
af7eda0f | 26 | fpu_control_t cw; |
deb5c024 | 27 | |
6b9a5fe4 | 28 | if ((round & ~_FPU_RC_MASK) != 0) |
deb5c024 | 29 | /* ROUND is no valid rounding mode. */ |
16e4bf6f | 30 | return 1; |
deb5c024 UD |
31 | |
32 | /* Get current state. */ | |
33 | _FPU_GETCW (cw); | |
34 | ||
35 | /* Set rounding bits. */ | |
6b9a5fe4 | 36 | cw &= ~_FPU_RC_MASK; |
deb5c024 UD |
37 | cw |= round; |
38 | /* Set new state. */ | |
39 | _FPU_SETCW (cw); | |
40 | ||
16e4bf6f | 41 | return 0; |
deb5c024 | 42 | } |
37896d39 DJ |
43 | |
44 | libm_hidden_def (fesetround) |