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/* Test of rounding to nearest, breaking ties away from zero.
Copyright (C) 2007-2009 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
/* Written by Ben Pfaff <blp@gnu.org>, 2007.
Based heavily on Bruno Haible's test-truncl.c. */
#include <config.h>
#include <math.h>
#include <float.h>
#include <stdio.h>
#include <stdlib.h>
#include "fpucw.h"
#include "isnanl-nolibm.h"
#include "nan.h"
#define ASSERT(expr) \
do \
{ \
if (!(expr)) \
{ \
fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
fflush (stderr); \
abort (); \
} \
} \
while (0)
/* On HP-UX 10.20, negating 0.0L does not yield -0.0L.
So we use minus_zero instead.
IRIX cc can't put -0.0L into .data, but can compute at runtime.
Note that the expression -LDBL_MIN * LDBL_MIN does not work on other
platforms, such as when cross-compiling to PowerPC on MacOS X 10.5. */
#if defined __hpux || defined __sgi
static long double
compute_minus_zero (void)
{
return -LDBL_MIN * LDBL_MIN;
}
# define minus_zero compute_minus_zero ()
#else
long double minus_zero = -0.0L;
#endif
int
main ()
{
DECL_LONG_DOUBLE_ROUNDING
BEGIN_LONG_DOUBLE_ROUNDING ();
/* Zero. */
ASSERT (roundl (0.0L) == 0.0L);
ASSERT (roundl (minus_zero) == 0.0L);
/* Positive numbers. */
ASSERT (roundl (0.3L) == 0.0L);
ASSERT (roundl (0.5L) == 1.0L);
ASSERT (roundl (0.7L) == 1.0L);
ASSERT (roundl (1.0L) == 1.0L);
ASSERT (roundl (1.5L) == 2.0L);
ASSERT (roundl (2.5L) == 3.0L);
ASSERT (roundl (1.999L) == 2.0L);
ASSERT (roundl (2.0L) == 2.0L);
ASSERT (roundl (65535.999L) == 65536.0L);
ASSERT (roundl (65536.0L) == 65536.0L);
ASSERT (roundl (65536.001L) == 65536.0L);
ASSERT (roundl (2.341e31L) == 2.341e31L);
/* Negative numbers. */
ASSERT (roundl (-0.3L) == 0.0L);
ASSERT (roundl (-0.5L) == -1.0L);
ASSERT (roundl (-0.7L) == -1.0L);
ASSERT (roundl (-1.0L) == -1.0L);
ASSERT (roundl (-1.5L) == -2.0L);
ASSERT (roundl (-2.5L) == -3.0L);
ASSERT (roundl (-1.999L) == -2.0L);
ASSERT (roundl (-2.0L) == -2.0L);
ASSERT (roundl (-65535.999L) == -65536.0L);
ASSERT (roundl (-65536.0L) == -65536.0L);
ASSERT (roundl (-65536.001L) == -65536.0L);
ASSERT (roundl (-2.341e31L) == -2.341e31L);
/* Infinite numbers. */
ASSERT (roundl (1.0 / 0.0L) == 1.0 / 0.0L);
ASSERT (roundl (-1.0 / 0.0L) == -1.0 / 0.0L);
/* NaNs. */
ASSERT (isnanl (roundl (NaNl ())));
return 0;
}
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