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73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
/* Test of rounding to nearest, breaking ties away from zero.
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Copyright (C) 2007-2017 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>. */
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/* Written by Ben Pfaff <blp@gnu.org>, 2007.
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Based heavily on Bruno Haible's test-trunc.c. */
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#include <config.h>
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#include <math.h>
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#include "signature.h"
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SIGNATURE_CHECK (round, double, (double));
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#include "isnand-nolibm.h"
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#include "minus-zero.h"
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#include "infinity.h"
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#include "nan.h"
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#include "macros.h"
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int
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main ()
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{
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/* Zero. */
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ASSERT (round (0.0) == 0.0);
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ASSERT (round (minus_zerod) == 0.0);
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/* Positive numbers. */
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ASSERT (round (0.3) == 0.0);
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ASSERT (round (0.5) == 1.0);
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ASSERT (round (0.7) == 1.0);
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ASSERT (round (1.0) == 1.0);
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ASSERT (round (1.5) == 2.0);
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ASSERT (round (2.5) == 3.0);
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ASSERT (round (1.999) == 2.0);
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ASSERT (round (2.0) == 2.0);
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ASSERT (round (65535.999) == 65536.0);
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ASSERT (round (65536.0) == 65536.0);
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ASSERT (round (65536.001) == 65536.0);
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ASSERT (round (2.341e31) == 2.341e31);
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/* Negative numbers. */
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ASSERT (round (-0.3) == 0.0);
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ASSERT (round (-0.5) == -1.0);
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ASSERT (round (-0.7) == -1.0);
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ASSERT (round (-1.0) == -1.0);
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ASSERT (round (-1.5) == -2.0);
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ASSERT (round (-2.5) == -3.0);
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ASSERT (round (-1.999) == -2.0);
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ASSERT (round (-2.0) == -2.0);
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ASSERT (round (-65535.999) == -65536.0);
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ASSERT (round (-65536.0) == -65536.0);
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ASSERT (round (-65536.001) == -65536.0);
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ASSERT (round (-2.341e31) == -2.341e31);
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/* Infinite numbers. */
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ASSERT (round (Infinityd ()) == Infinityd ());
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ASSERT (round (- Infinityd ()) == - Infinityd ());
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/* NaNs. */
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ASSERT (isnand (round (NaNd ())));
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return 0;
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}
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