1 /* Set current rounding direction.
2    Copyright (C) 2020-2022 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 <fenv_private.h>
21 
22 int
__fesetround(int round)23 __fesetround (int round)
24 {
25   unsigned int fpcr;
26 
27   _FPU_GETCW (fpcr);
28 
29   if (((fpcr >> __FPU_RND_SHIFT) & __FPU_RND_MASK) != round)
30     {
31       fpcr &= ~(__FPU_RND_MASK << __FPU_RND_SHIFT);
32       fpcr |= (round & __FPU_RND_MASK) << __FPU_RND_SHIFT;
33       _FPU_SETCW (fpcr);
34     }
35 
36   return 0;
37 }
38 libm_hidden_def (__fesetround)
39 weak_alias (__fesetround, fesetround)
40 libm_hidden_weak (fesetround)
41