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/* Test of rounding to nearest, breaking ties away from zero.
Copyright (C) 2007-2020 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, see <https://www.gnu.org/licenses/>. */
/* Written by Ben Pfaff <blp@gnu.org>, 2007.
Based heavily on Bruno Haible's test-trunc.c. */
#include <config.h>
#include <math.h>
#include "signature.h"
SIGNATURE_CHECK (round, double, (double));
#include "isnand-nolibm.h"
#include "minus-zero.h"
#include "infinity.h"
#include "nan.h"
#include "macros.h"
int
main ()
{
/* Zero. */
ASSERT (round (0.0) == 0.0);
ASSERT (round (minus_zerod) == 0.0);
/* Positive numbers. */
ASSERT (round (0.3) == 0.0);
ASSERT (round (0.5) == 1.0);
ASSERT (round (0.7) == 1.0);
ASSERT (round (1.0) == 1.0);
ASSERT (round (1.5) == 2.0);
ASSERT (round (2.5) == 3.0);
ASSERT (round (1.999) == 2.0);
ASSERT (round (2.0) == 2.0);
ASSERT (round (65535.999) == 65536.0);
ASSERT (round (65536.0) == 65536.0);
ASSERT (round (65536.001) == 65536.0);
ASSERT (round (2.341e31) == 2.341e31);
/* Negative numbers. */
ASSERT (round (-0.3) == 0.0);
ASSERT (round (-0.5) == -1.0);
ASSERT (round (-0.7) == -1.0);
ASSERT (round (-1.0) == -1.0);
ASSERT (round (-1.5) == -2.0);
ASSERT (round (-2.5) == -3.0);
ASSERT (round (-1.999) == -2.0);
ASSERT (round (-2.0) == -2.0);
ASSERT (round (-65535.999) == -65536.0);
ASSERT (round (-65536.0) == -65536.0);
ASSERT (round (-65536.001) == -65536.0);
ASSERT (round (-2.341e31) == -2.341e31);
/* Infinite numbers. */
ASSERT (round (Infinityd ()) == Infinityd ());
ASSERT (round (- Infinityd ()) == - Infinityd ());
/* NaNs. */
ASSERT (isnand (round (NaNd ())));
return 0;
}
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