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47 lines
1.6 KiB
C
47 lines
1.6 KiB
C
/* Software floating-point exception handling emulation.
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Copyright (C) 2002-2013 Free Software Foundation, Inc.
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Contributed by Aldy Hernandez <aldyh@redhat.com>, 2002.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<http://www.gnu.org/licenses/>. */
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#include <signal.h>
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#include "soft-fp.h"
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#include "soft-supp.h"
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/* FIXME: these variables should be thread specific (see bugzilla bug
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15483) and ideally preserved across signal handlers, like hardware
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FP status words, but the latter is quite difficult to accomplish in
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userland. */
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/* Global to store sticky exceptions. */
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int __sim_exceptions __attribute__ ((nocommon));
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libc_hidden_data_def (__sim_exceptions);
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/* By default, no exceptions should trap. */
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int __sim_disabled_exceptions = 0xffffffff;
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libc_hidden_data_def (__sim_disabled_exceptions);
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int __sim_round_mode __attribute__ ((nocommon));
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libc_hidden_data_def (__sim_round_mode);
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void
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__simulate_exceptions (int x)
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{
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__sim_exceptions |= x;
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if (x & ~__sim_disabled_exceptions)
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raise (SIGFPE);
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}
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