1 /* Install given floating-point environment and raise exceptions,
2    without clearing currently raised exceptions.
3    Copyright (C) 2020-2021 Free Software Foundation, Inc.
4    This file is part of the GNU C Library.
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    <https://www.gnu.org/licenses/>.  */
19 
20 #include <fenv.h>
21 #include <fpu_control.h>
22 
23 int
__feupdateenv(const fenv_t * envp)24 __feupdateenv (const fenv_t *envp)
25 {
26   unsigned int fpcr;
27   unsigned int fpsr;
28 
29   _FPU_GETS (fpsr);
30 
31   if (envp == FE_DFL_ENV)
32     {
33       fpcr = _FPU_DEFAULT;
34     }
35   else
36     {
37       fpcr = envp->__fpcr;
38 
39       /* currently raised exceptions need to be preserved.  */
40       fpsr |= envp->__fpsr;
41     }
42 
43   _FPU_SETCW (fpcr);
44   _FPU_SETS (fpsr);
45 
46   /* Success.  */
47   return 0;
48 }
49 libm_hidden_def (__feupdateenv)
50 weak_alias (__feupdateenv, feupdateenv)
51 libm_hidden_weak (feupdateenv)
52