1 /* Raise given exceptions.
2 Copyright (C) 1997,99,2000,01,02 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
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/>. */
25 __feraiseexcept (int excepts
)
27 /* Raise exceptions represented by EXCEPTS. But we must raise only one
28 signal at a time. It is important that if the overflow/underflow
29 exception and the divide by zero exception are given at the same
30 time, the overflow/underflow exception follows the divide by zero
33 /* First: invalid exception. */
34 if (excepts
& FE_INVALID
)
36 /* One example of a invalid operation is 0 * Infinity. */
38 __asm__
__volatile__ ("fmul%.s %#0r0,%0; fnop" : "=f" (d
) : "0" (d
));
41 /* Next: division by zero. */
42 if (excepts
& FE_DIVBYZERO
)
45 __asm__
__volatile__ ("fdiv%.s %#0r0,%0; fnop" : "=f" (d
) : "0" (d
));
49 if (excepts
& FE_OVERFLOW
)
51 long double d
= LDBL_MAX
;
53 __asm__
__volatile__ ("fmul%.x %0,%0; fnop" : "=f" (d
) : "0" (d
));
56 /* Next: underflow. */
57 if (excepts
& FE_UNDERFLOW
)
59 long double d
= -LDBL_MAX
;
61 __asm__
__volatile__ ("fetox%.x %0; fnop" : "=f" (d
) : "0" (d
));
65 if (excepts
& FE_INEXACT
)
68 __asm__
__volatile__ ("fdiv%.s %#0r3,%0; fnop" : "=f" (d
) : "0" (d
));
75 #include <shlib-compat.h>
76 #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
77 strong_alias (__feraiseexcept
, __old_feraiseexcept
)
78 compat_symbol (libm
, __old_feraiseexcept
, feraiseexcept
, GLIBC_2_1
);
81 libm_hidden_ver (__feraiseexcept
, feraiseexcept
)
82 versioned_symbol (libm
, __feraiseexcept
, feraiseexcept
, GLIBC_2_2
);