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34 lines
1.2 KiB
C
34 lines
1.2 KiB
C
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/* Return current rounding direction.
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Copyright (C) 1997, 2001 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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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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int
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fegetround (void)
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{
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int cw;
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/* We only check the x87 FPU unit. The SSE unit should be the same
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- and if it's not the same there's no way to signal it. */
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__asm__ ("fnstcw %0" : "=m" (*&cw));
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return cw & 0xc00;
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}
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