1 /* Store current floating-point environment.
2 Copyright (C) 2001-2017 Free Software Foundation, Inc.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
17
18 #include <fenv.h>
19
20 int
fegetenv(fenv_t * envp)21 fegetenv (fenv_t *envp)
22 {
23 __asm__ ("fnstenv %0\n"
24 /* fnstenv changes the exception mask, so load back the
25 stored environment. */
26 "fldenv %0\n"
27 "stmxcsr %1" : "=m" (*envp), "=m" (envp->__mxcsr));
28
29 /* Success. */
30 return 0;
31 }
32