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39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
/* Enable floating-point exceptions.
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Copyright (C) 2000-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Andreas Schwab <schwab@suse.de>, 2000.
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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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<https://www.gnu.org/licenses/>. */
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#include <fenv.h>
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int
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feenableexcept (int excepts)
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{
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unsigned int new_exc, old_exc;
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/* Get the current control register contents. */
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__asm__ ("fmove%.l %!,%0" : "=dm" (new_exc));
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old_exc = (new_exc >> 6) & FE_ALL_EXCEPT;
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excepts &= FE_ALL_EXCEPT;
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new_exc |= excepts << 6;
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__asm__ ("fmove%.l %0,%!" : : "dm" (new_exc));
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return old_exc;
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}
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