mirror of git://gcc.gnu.org/git/gcc.git
73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
/* Copyright (C) 2012-2019 Free Software Foundation, Inc.
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This file is part of the GNU Atomic Library (libatomic).
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Libatomic is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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Libatomic is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "libatomic_i.h"
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#ifdef HAVE_FENV_H
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# include <fenv.h>
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#endif
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/* Raise the supported floating-point exceptions from EXCEPTS. Other
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bits in EXCEPTS are ignored. */
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void
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__atomic_feraiseexcept (int excepts __attribute__ ((unused)))
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{
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volatile float r __attribute__ ((unused));
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#ifdef FE_INVALID
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if (excepts & FE_INVALID)
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{
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volatile float zero = 0.0f;
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r = zero / zero;
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}
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#endif
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#ifdef FE_DIVBYZERO
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if (excepts & FE_DIVBYZERO)
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{
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volatile float zero = 0.0f;
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r = 1.0f / zero;
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}
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#endif
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#ifdef FE_OVERFLOW
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if (excepts & FE_OVERFLOW)
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{
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volatile float max = __FLT_MAX__;
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r = max * max;
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}
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#endif
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#ifdef FE_UNDERFLOW
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if (excepts & FE_UNDERFLOW)
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{
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volatile float min = __FLT_MIN__;
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r = min * min;
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}
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#endif
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#ifdef FE_INEXACT
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if (excepts & FE_INEXACT)
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{
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volatile float three = 3.0f;
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r = 1.0f / three;
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}
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#endif
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}
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