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maint: Run 'make update-copyright'
author Paul Eggert <eggert@cs.ucla.edu>
date Tue, 01 Jan 2019 00:25:11 +0100
parents 10eb9086bea0
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /* Test of rounding to nearest, breaking ties away from zero.
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2 Copyright (C) 2007-2019 Free Software Foundation, Inc.
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3
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4 This program is free software; you can redistribute it and/or modify
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5 it under the terms of the GNU General Public License as published by
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6 the Free Software Foundation; either version 3, or (at your option)
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7 any later version.
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8
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9 This program is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 GNU General Public License for more details.
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13
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14 You should have received a copy of the GNU General Public License
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15 along with this program; if not, see <https://www.gnu.org/licenses/>. */
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16
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17 /* Written by Ben Pfaff <blp@gnu.org>, 2007.
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18 Based heavily on Bruno Haible's test-trunc.c. */
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19
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20 #include <config.h>
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21
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22 #include <math.h>
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23
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24 #include "signature.h"
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25 SIGNATURE_CHECK (round, double, (double));
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26
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27 #include "isnand-nolibm.h"
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28 #include "minus-zero.h"
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29 #include "infinity.h"
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30 #include "nan.h"
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31 #include "macros.h"
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32
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33 int
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34 main ()
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35 {
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36 /* Zero. */
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37 ASSERT (round (0.0) == 0.0);
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38 ASSERT (round (minus_zerod) == 0.0);
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39 /* Positive numbers. */
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40 ASSERT (round (0.3) == 0.0);
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41 ASSERT (round (0.5) == 1.0);
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42 ASSERT (round (0.7) == 1.0);
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43 ASSERT (round (1.0) == 1.0);
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44 ASSERT (round (1.5) == 2.0);
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45 ASSERT (round (2.5) == 3.0);
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46 ASSERT (round (1.999) == 2.0);
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47 ASSERT (round (2.0) == 2.0);
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48 ASSERT (round (65535.999) == 65536.0);
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49 ASSERT (round (65536.0) == 65536.0);
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50 ASSERT (round (65536.001) == 65536.0);
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51 ASSERT (round (2.341e31) == 2.341e31);
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52 /* Negative numbers. */
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53 ASSERT (round (-0.3) == 0.0);
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54 ASSERT (round (-0.5) == -1.0);
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55 ASSERT (round (-0.7) == -1.0);
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56 ASSERT (round (-1.0) == -1.0);
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57 ASSERT (round (-1.5) == -2.0);
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58 ASSERT (round (-2.5) == -3.0);
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59 ASSERT (round (-1.999) == -2.0);
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60 ASSERT (round (-2.0) == -2.0);
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61 ASSERT (round (-65535.999) == -65536.0);
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62 ASSERT (round (-65536.0) == -65536.0);
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63 ASSERT (round (-65536.001) == -65536.0);
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64 ASSERT (round (-2.341e31) == -2.341e31);
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65 /* Infinite numbers. */
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66 ASSERT (round (Infinityd ()) == Infinityd ());
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67 ASSERT (round (- Infinityd ()) == - Infinityd ());
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68 /* NaNs. */
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69 ASSERT (isnand (round (NaNd ())));
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70
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71 return 0;
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72 }