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42 lines
1.5 KiB
C
42 lines
1.5 KiB
C
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/* Set floating-point environment exception handling.
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Copyright (C) 1997, 1999, 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by David Huggins-Daines <dhd@debian.org>, 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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <fenv.h>
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#include <math.h>
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int
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fesetexceptflag (const fexcept_t *flagp, int excepts)
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{
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unsigned int sw[2];
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/* Get the current status word. */
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__asm__ ("fstd %%fr0,0(%1)" : "=m" (*sw) : "r" (sw));
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/* Install the new exception flags bits. */
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sw[0] &= ~(excepts & (FE_ALL_EXCEPT >> 27));
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sw[0] |= (*flagp & excepts & FE_ALL_EXCEPT) << 27;
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/* Store the new status word. */
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__asm__ ("fldd 0(%0),%%fr0" : : "r" (sw));
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/* Success. */
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return 0;
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}
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