1 /* Test of rounding towards zero.
2 Copyright (C) 2007-2008 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 /* Written by Bruno Haible <bruno@clisp.org>, 2007. */
27 #include "isnanl-nolibm.h"
29 #define ASSERT(expr) \
34 fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
41 /* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0L.
42 So we use -zero instead. */
43 long double zero = 0.0L;
48 DECL_LONG_DOUBLE_ROUNDING
50 BEGIN_LONG_DOUBLE_ROUNDING ();
53 ASSERT (truncl (0.0L) == 0.0L);
54 ASSERT (truncl (-zero) == 0.0L);
55 /* Positive numbers. */
56 ASSERT (truncl (0.3L) == 0.0L);
57 ASSERT (truncl (0.7L) == 0.0L);
58 ASSERT (truncl (1.0L) == 1.0L);
59 ASSERT (truncl (1.5L) == 1.0L);
60 ASSERT (truncl (1.999L) == 1.0L);
61 ASSERT (truncl (2.0L) == 2.0L);
62 ASSERT (truncl (65535.999L) == 65535.0L);
63 ASSERT (truncl (65536.0L) == 65536.0L);
64 ASSERT (truncl (2.341e31L) == 2.341e31L);
65 /* Negative numbers. */
66 ASSERT (truncl (-0.3L) == 0.0L);
67 ASSERT (truncl (-0.7L) == 0.0L);
68 ASSERT (truncl (-1.0L) == -1.0L);
69 ASSERT (truncl (-1.5L) == -1.0L);
70 ASSERT (truncl (-1.999L) == -1.0L);
71 ASSERT (truncl (-2.0L) == -2.0L);
72 ASSERT (truncl (-65535.999L) == -65535.0L);
73 ASSERT (truncl (-65536.0L) == -65536.0L);
74 ASSERT (truncl (-2.341e31L) == -2.341e31L);
75 /* Infinite numbers. */
76 ASSERT (truncl (1.0L / 0.0L) == 1.0L / 0.0L);
77 ASSERT (truncl (-1.0L / 0.0L) == -1.0L / 0.0L);
79 ASSERT (isnanl (truncl (0.0L / 0.0L)));