]>
git.ipfire.org Git - thirdparty/glibc.git/blob - sysdeps/i386/fpu/ftestexcept.c
1 /* Test exception in current environment.
2 Copyright (C) 1997, 2003, 2004, 2010 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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.
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.
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 <http://www.gnu.org/licenses/>. */
22 #include <dl-procinfo.h>
26 fetestexcept (int excepts
)
31 /* Get current exceptions. */
32 __asm__ ("fnstsw %0" : "=a" (temp
));
34 /* If the CPU supports SSE we test the MXCSR as well. */
35 if ((GLRO(dl_hwcap
) & HWCAP_I386_XMM
) != 0)
36 __asm__ ("stmxcsr %0" : "=m" (*&xtemp
));
38 return (temp
| xtemp
) & excepts
& FE_ALL_EXCEPT
;
40 libm_hidden_def (fetestexcept
)