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b15cb495 UD |
1 | /* Set current rounding direction. |
2 | Copyright (C) 2000 Free Software Foundation, Inc. | |
3 | This file is part of the GNU C Library. | |
4 | Contributed by David Huggins-Daines <dhd@debian.org>, 2000 | |
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. | |
b15cb495 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. |
b15cb495 | 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. */ | |
b15cb495 UD |
20 | |
21 | #include <fenv.h> | |
22 | ||
23 | int | |
24 | fesetround (int round) | |
25 | { | |
26 | unsigned int sw[2]; | |
27 | ||
28 | if (round & ~FE_DOWNWARD) | |
29 | /* ROUND is not a valid rounding mode. */ | |
30 | return 1; | |
31 | ||
32 | /* Get the current status word. */ | |
33 | __asm__ ("fstd %%fr0,0(%1)" : "=m" (*sw) : "r" (sw)); | |
fa9a4ff0 | 34 | sw[0] &= ~FE_DOWNWARD; |
b15cb495 UD |
35 | sw[0] |= round; |
36 | __asm__ ("fldd 0(%0),%%fr0" : : "r" (sw)); | |
37 | ||
38 | return 0; | |
39 | } |