1 /* Store current representation for exceptions.
2 Copyright (C) 2001-2021 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
21 int
fegetexceptflag(fexcept_t * flagp,int excepts)22 fegetexceptflag (fexcept_t *flagp, int excepts)
23 {
24 fexcept_t temp;
25 unsigned int mxscr;
26
27 /* Get the current exceptions for the x87 FPU and SSE unit. */
28 __asm__ ("fnstsw %0\n"
29 "stmxcsr %1" : "=m" (*&temp), "=m" (*&mxscr));
30
31 *flagp = (temp | mxscr) & FE_ALL_EXCEPT & excepts;
32
33 /* Success. */
34 return 0;
35 }
36