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git.ipfire.org Git - thirdparty/glibc.git/blob - sysdeps/powerpc/powerpc32/e500/nofpu/spe-raise.c
1 /* Raise given exceptions, given the SPEFSCR bits for those exceptions.
2 Copyright (C) 1997-2013 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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 <http://www.gnu.org/licenses/>. */
19 #include <fenv_libc.h>
22 __FERAISEEXCEPT_INTERNAL (int excepts
)
26 f
= fegetenv_register ();
27 f
|= (excepts
& SPEFSCR_ALL_EXCEPT
);
28 fesetenv_register (f
);
30 /* Force the operations that cause the exceptions. */
31 if ((SPEFSCR_FINVS
& excepts
) != 0)
33 asm volatile ("efsdiv %0,%0,%1" : : "r" (0), "r" (0));
35 if ((SPEFSCR_FDBZS
& excepts
) != 0)
37 asm volatile ("efsdiv %0,%0,%1" : : "r" (1.0F
), "r" (0));
39 if ((SPEFSCR_FOVFS
& excepts
) != 0)
40 /* Largest normalized number plus itself. */
41 asm volatile ("efsadd %0,%0,%1" : : "r" (0x7f7fffff), "r" (0x7f7fffff));
43 if ((SPEFSCR_FUNFS
& excepts
) != 0)
44 /* Smallest normalized number times itself. */
45 asm volatile ("efsmul %0,%0,%1" : : "r" (0x800000), "r" (0x800000));
47 if ((SPEFSCR_FINXS
& excepts
) != 0)
48 /* Smallest normalized minus 1.0 raises the inexact flag. */
49 asm volatile ("efssub %0,%0,%1" : : "r" (0x00800000), "r" (1.0F
));