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44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
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/* Return positive difference between arguments.
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Copyright (C) 1997, 2004, 2009 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 <errno.h>
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#include "quadmath-imp.h"
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__float128
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fdimq (__float128 x, __float128 y)
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{
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int clsx = fpclassifyq (x);
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int clsy = fpclassifyq (y);
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if (clsx == QUADFP_NAN || clsy == QUADFP_NAN
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|| (y < 0 && clsx == QUADFP_INFINITE && clsy == QUADFP_INFINITE))
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/* Raise invalid flag. */
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return x - y;
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if (x <= y)
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return 0.0Q;
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__float128 r = x - y;
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if (isinfq (r))
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errno = ERANGE;
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return r;
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}
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