glibc/sysdeps/generic/s_fdiml.c
Ulrich Drepper 6497a1d081 [BZ #376]
Update.
	* sysdeps/generic/s_fdim.c: Handle +inf/+inf
	* sysdeps/generic/s_fdimf.c: Likewise.
	* sysdeps/generic/s_fdiml.c: Likewise.
	* sysdeps/i386/i686/fpu/s_fdim.S: Likewise.
	* sysdeps/i386/i686/fpu/s_fdimf.S: Likewise.
	* sysdeps/i386/i686/fpu/s_fdiml.S: Likewise.
	* sysdeps/powerpc/fpu/s_fdim.c: Likewise.
	* sysdeps/powerpc/fpu/s_fdimf.c: Likewise.
	* sysdeps/x86_64/fpu/s_fdiml.S: Likewise.
	* math/libm-test.inc (fdim_test): Add test case.  [BZ #376].
2004-09-26 10:11:59 +00:00

37 lines
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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)