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/* Test of rounding to nearest, breaking ties away from zero.
Copyright (C) 2007, 2008 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-truncf.c. */
#include <config.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include "isnanf.h"
#include "nan.h"
#define ASSERT(expr) \
do \
{ \
if (!(expr)) \
{ \
fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
abort (); \
} \
} \
while (0)
int
main ()
{
/* Zero. */
ASSERT (roundf (0.0f) == 0.0f);
ASSERT (roundf (-0.0f) == 0.0f);
/* Positive numbers. */
ASSERT (roundf (0.3f) == 0.0f);
ASSERT (roundf (0.5f) == 1.0f);
ASSERT (roundf (0.7f) == 1.0f);
ASSERT (roundf (1.0f) == 1.0f);
ASSERT (roundf (1.5f) == 2.0f);
ASSERT (roundf (2.5f) == 3.0f);
ASSERT (roundf (1.999f) == 2.0f);
ASSERT (roundf (2.0f) == 2.0f);
ASSERT (roundf (65535.99f) == 65536.0f);
ASSERT (roundf (65536.0f) == 65536.0f);
ASSERT (roundf (65536.01f) == 65536.0f);
ASSERT (roundf (2.341e31f) == 2.341e31f);
/* Negative numbers. */
ASSERT (roundf (-0.3f) == 0.0f);
ASSERT (roundf (-0.5f) == -1.0f);
ASSERT (roundf (-0.7f) == -1.0f);
ASSERT (roundf (-1.0f) == -1.0f);
ASSERT (roundf (-1.5f) == -2.0f);
ASSERT (roundf (-2.5f) == -3.0f);
ASSERT (roundf (-1.999f) == -2.0f);
ASSERT (roundf (-2.0f) == -2.0f);
ASSERT (roundf (-65535.99f) == -65536.0f);
ASSERT (roundf (-65536.0f) == -65536.0f);
ASSERT (roundf (-65536.01f) == -65536.0f);
ASSERT (roundf (-2.341e31f) == -2.341e31f);
/* Infinite numbers. */
ASSERT (roundf (1.0 / 0.0f) == 1.0 / 0.0f);
ASSERT (roundf (-1.0 / 0.0f) == -1.0 / 0.0f);
/* NaNs. */
ASSERT (isnanf (roundf (NaNf ())));
return 0;
}
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