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git.ipfire.org Git - thirdparty/glibc.git/blob - sysdeps/s390/fpu/fraiseexcpt.c
1 /* Raise given exceptions.
2 Copyright (C) 2000-2013 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Denis Joseph Barrow (djbarrow@de.ibm.com) and
5 Martin Schwidefsky (schwidefsky@de.ibm.com).
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public
9 License as published by the Free Software Foundation; either
10 version 2.1 of the License, or (at your option) any later version.
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public
18 License along with the GNU C Library; if not, see
19 <http://www.gnu.org/licenses/>. */
21 #include <fenv_libc.h>
26 static __inline__
void
27 fexceptdiv (float d
, float e
)
29 __asm__
__volatile__ ("debr %0,%1" : : "f" (d
), "f" (e
) );
32 static __inline__
void
33 fexceptadd (float d
, float e
)
35 __asm__
__volatile__ ("aebr %0,%1" : : "f" (d
), "f" (e
) );
40 feraiseexcept (int excepts
)
42 /* Raise exceptions represented by EXPECTS. But we must raise only
43 one signal at a time. It is important that if the overflow/underflow
44 exception and the inexact exception are given at the same time,
45 the overflow/underflow exception follows the inexact exception. */
47 /* First: invalid exception. */
48 if (FE_INVALID
& excepts
)
49 fexceptdiv (0.0, 0.0);
51 /* Next: division by zero. */
52 if (FE_DIVBYZERO
& excepts
)
53 fexceptdiv (1.0, 0.0);
56 if (FE_OVERFLOW
& excepts
)
57 /* I don't think we can do the same trick as intel so we will have
58 to live with inexact coming also. */
59 fexceptadd (FLT_MAX
, 1.0e32
);
61 /* Next: underflow. */
62 if (FE_UNDERFLOW
& excepts
)
63 fexceptdiv (FLT_MIN
, 3.0);
66 if (FE_INEXACT
& excepts
)
67 fexceptdiv (2.0, 3.0);
72 libm_hidden_def (feraiseexcept
)