73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
/* Copyright (C) 2012-2018 Free Software Foundation, Inc.
|
|
|
|
This file is part of the GNU Atomic Library (libatomic).
|
|
|
|
Libatomic is free software; you can redistribute it and/or modify it
|
|
under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
Libatomic is distributed in the hope that it will be useful, but WITHOUT ANY
|
|
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
|
FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
more details.
|
|
|
|
Under Section 7 of GPL version 3, you are granted additional
|
|
permissions described in the GCC Runtime Library Exception, version
|
|
3.1, as published by the Free Software Foundation.
|
|
|
|
You should have received a copy of the GNU General Public License and
|
|
a copy of the GCC Runtime Library Exception along with this program;
|
|
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include "libatomic_i.h"
|
|
|
|
#ifdef HAVE_FENV_H
|
|
# include <fenv.h>
|
|
#endif
|
|
|
|
/* Raise the supported floating-point exceptions from EXCEPTS. Other
|
|
bits in EXCEPTS are ignored. */
|
|
|
|
void
|
|
__atomic_feraiseexcept (int excepts __attribute__ ((unused)))
|
|
{
|
|
volatile float r __attribute__ ((unused));
|
|
#ifdef FE_INVALID
|
|
if (excepts & FE_INVALID)
|
|
{
|
|
volatile float zero = 0.0f;
|
|
r = zero / zero;
|
|
}
|
|
#endif
|
|
#ifdef FE_DIVBYZERO
|
|
if (excepts & FE_DIVBYZERO)
|
|
{
|
|
volatile float zero = 0.0f;
|
|
r = 1.0f / zero;
|
|
}
|
|
#endif
|
|
#ifdef FE_OVERFLOW
|
|
if (excepts & FE_OVERFLOW)
|
|
{
|
|
volatile float max = __FLT_MAX__;
|
|
r = max * max;
|
|
}
|
|
#endif
|
|
#ifdef FE_UNDERFLOW
|
|
if (excepts & FE_UNDERFLOW)
|
|
{
|
|
volatile float min = __FLT_MIN__;
|
|
r = min * min;
|
|
}
|
|
#endif
|
|
#ifdef FE_INEXACT
|
|
if (excepts & FE_INEXACT)
|
|
{
|
|
volatile float three = 3.0f;
|
|
r = 1.0f / three;
|
|
}
|
|
#endif
|
|
}
|