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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libquadmath/] [math/] [fdimq.c] - Blame information for rev 740

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1 740 jeremybenn
/* 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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