1 /* Install given floating-point environment and raise exceptions.
2 Copyright (C) 2013 Imagination Technologies Ltd.
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; see the file COPYING.LIB. If
17 not, see <http://www.gnu.org/licenses/>. */
18
19 #include <fenv.h>
20 #include <unistd.h>
21
22 libm_hidden_proto(fesetenv)
libm_hidden_proto(feraiseexcept)23 libm_hidden_proto(feraiseexcept)
24
25 int
26 feupdateenv (const fenv_t *envp)
27 {
28 unsigned int temp;
29
30 /* Save current exceptions. */
31 __asm__ ("MOV %0,TXDEFR" : "=r" (temp));
32
33 temp >>= 16;
34 temp &= FE_ALL_EXCEPT;
35
36 /* Install new environment. */
37 fesetenv (envp);
38
39 /* Raise the saved exception. */
40 feraiseexcept ((int) temp);
41
42 /* Success. */
43 return 0;
44 }
45