1 /* Set current rounding direction.
2 Copyright (C) 2004, 2006 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Aldy Hernandez <aldyh@redhat.com>, 2004.
5
6 The GNU C Library is free software; you can redistribute it and/or
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.
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
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
19
20 #include "fenv_libc.h"
21
22 int
fesetround(int round)23 fesetround (int round)
24 {
25 unsigned long fpescr;
26
27 if ((unsigned int) round > 3)
28 return 1;
29
30 fpescr = fegetenv_register ();
31 fpescr = (fpescr & ~SPEFSCR_FRMC) | (round & 3);
32 fesetenv_register (fpescr);
33
34 return 0;
35 }
36 libm_hidden_def (fesetround)
37