[thirdparty/glibc.git] / sysdeps / generic / s_fdiml.c

/* Return positive difference between arguments.
   Copyright (C) 1997, 2004 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <math.h>

long double
__fdiml (long double x, long double y)
{
  int clsx = fpclassify (x);
  int clsy = fpclassify (y);

  if (clsx == FP_NAN || clsy == FP_NAN
      || (y < 0 && clsx == FP_INFINITE && clsy == FP_INFINITE))
    /* Raise invalid flag.  */
    return x - y;

  return x <= y ? 0 : x - y;
}
weak_alias (__fdiml, fdiml)
Commit	Line	Data
377a515b	1	/* Return positive difference between arguments.
6497a1d0	2	Copyright (C) 1997, 2004 Free Software Foundation, Inc.
377a515b UD	3	This file is part of the GNU C Library.
	4	Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
	5
	6	The GNU C Library is free software; you can redistribute it and/or
41bdb6e2 AJ	7	modify it under the terms of the GNU Lesser General Public
	8	License as published by the Free Software Foundation; either
	9	version 2.1 of the License, or (at your option) any later version.
377a515b UD	10
	11	The GNU C Library is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
41bdb6e2	14	Lesser General Public License for more details.
377a515b	15
41bdb6e2 AJ	16	You should have received a copy of the GNU Lesser General Public
	17	License along with the GNU C Library; if not, write to the Free
	18	Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	19	02111-1307 USA. */
377a515b UD	20
	21	#include <math.h>
	22
	23	long double
	24	__fdiml (long double x, long double y)
	25	{
	26	int clsx = fpclassify (x);
	27	int clsy = fpclassify (y);
	28
	29	if (clsx == FP_NAN \|\| clsy == FP_NAN
	30	\|\| (y < 0 && clsx == FP_INFINITE && clsy == FP_INFINITE))
	31	/* Raise invalid flag. */
	32	return x - y;
	33
6497a1d0	34	return x <= y ? 0 : x - y;
377a515b UD	35	}
377a515b UD	36	weak_alias (__fdiml, fdiml)