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63551311 | 1 | /* Set current rounding direction. |
a334319f | 2 | Copyright (C) 1998 Free Software Foundation, Inc. |
63551311 | 3 | This file is part of the GNU C Library. |
a334319f | 4 | Contributed by Andreas Jaeger <aj@arthur.rhein-neckar.de>, 1998. |
63551311 UD |
5 | |
6 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 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. | |
63551311 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 | |
41bdb6e2 | 14 | Lesser General Public License for more details. |
63551311 | 15 | |
41bdb6e2 AJ |
16 | You should have received a copy of the GNU Lesser General Public |
17 | License along with the GNU C Library; if not, write to the Free | |
18 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
19 | 02111-1307 USA. */ | |
63551311 UD |
20 | |
21 | #include <fenv.h> | |
a334319f | 22 | #include <fpu_control.h> |
63551311 UD |
23 | |
24 | int | |
25 | fesetround (int round) | |
26 | { | |
a334319f UD |
27 | unsigned short int cw; |
28 | ||
29 | if ((round & ~0x3) != 0) | |
30 | /* ROUND is no valid rounding mode. */ | |
31 | return 1; | |
32 | ||
33 | /* Get current state. */ | |
34 | _FPU_GETCW (cw); | |
35 | ||
36 | /* Set rounding bits. */ | |
37 | cw &= ~0x3; | |
38 | cw |= round; | |
39 | /* Set new state. */ | |
40 | _FPU_SETCW (cw); | |
41 | ||
42 | return 0; | |
63551311 | 43 | } |