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48 lines
1.5 KiB
C
48 lines
1.5 KiB
C
/* Clear given exceptions in current floating-point environment.
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Copyright (C) 1998, 1999, 2000, 2002 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Andreas Jaeger <aj@suse.de>, 1998.
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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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <fenv.h>
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#include <fenv_libc.h>
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#include <fpu_control.h>
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int
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feclearexcept (int excepts)
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{
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int cw;
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/* Mask out unsupported bits/exceptions. */
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excepts &= FE_ALL_EXCEPT;
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/* Read the complete control word. */
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_FPU_GETCW (cw);
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/* Clear exception flag bits and cause bits. If the cause bit is not
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cleared, the next CTC instruction (just below) will re-generate the
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exception. */
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cw &= ~(excepts | (excepts << CAUSE_SHIFT));
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/* Put the new data in effect. */
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_FPU_SETCW (cw);
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/* Success. */
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return 0;
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}
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