1 /* Raise given exceptions.
2 Copyright (C) 1997-2022 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 <https://www.gnu.org/licenses/>. */
24 __feraiseexcept (int excepts
)
26 /* Raise exceptions represented by EXCEPTS. But we must raise only one
27 signal at a time. It is important that if the overflow/underflow
28 exception and the divide by zero exception are given at the same
29 time, the overflow/underflow exception follows the divide by zero
32 /* First: invalid exception. */
33 if (excepts
& FE_INVALID
)
35 /* One example of an invalid operation is 0 * Infinity. */
37 __asm__
__volatile__ ("fmul%.s %#0r0,%0; fnop" : "=f" (d
) : "0" (d
));
40 /* Next: division by zero. */
41 if (excepts
& FE_DIVBYZERO
)
44 __asm__
__volatile__ ("fdiv%.s %#0r0,%0; fnop" : "=f" (d
) : "0" (d
));
48 if (excepts
& FE_OVERFLOW
)
50 long double d
= LDBL_MAX
;
52 __asm__
__volatile__ ("fmul%.x %0,%0; fnop" : "=f" (d
) : "0" (d
));
55 /* Next: underflow. */
56 if (excepts
& FE_UNDERFLOW
)
58 long double d
= -LDBL_MAX
;
60 __asm__
__volatile__ ("fetox%.x %0; fnop" : "=f" (d
) : "0" (d
));
64 if (excepts
& FE_INEXACT
)
67 __asm__
__volatile__ ("fdiv%.s %#0r3,%0; fnop" : "=f" (d
) : "0" (d
));
74 #include <shlib-compat.h>
75 #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
76 strong_alias (__feraiseexcept
, __old_feraiseexcept
)
77 compat_symbol (libm
, __old_feraiseexcept
, feraiseexcept
, GLIBC_2_1
);
80 libm_hidden_def (__feraiseexcept
)
81 libm_hidden_ver (__feraiseexcept
, feraiseexcept
)
82 versioned_symbol (libm
, __feraiseexcept
, feraiseexcept
, GLIBC_2_2
);