1 /* Test of rounding towards zero.
2 Copyright (C) 2007 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. */
26 #define ASSERT(expr) \
31 fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
37 /* The Compaq (ex-DEC) C 6.4 compiler chokes on the expression 0.0 / 0.0. */
42 static float zero = 0.0f;
46 # define NaN() (0.0f / 0.0f)
53 ASSERT (truncf (0.0f) == 0.0f);
54 ASSERT (truncf (-0.0f) == 0.0f);
55 /* Positive numbers. */
56 ASSERT (truncf (0.3f) == 0.0f);
57 ASSERT (truncf (0.7f) == 0.0f);
58 ASSERT (truncf (1.0f) == 1.0f);
59 ASSERT (truncf (1.5f) == 1.0f);
60 ASSERT (truncf (1.999f) == 1.0f);
61 ASSERT (truncf (2.0f) == 2.0f);
62 ASSERT (truncf (65535.99f) == 65535.0f);
63 ASSERT (truncf (65536.0f) == 65536.0f);
64 ASSERT (truncf (2.341e31f) == 2.341e31f);
65 /* Negative numbers. */
66 ASSERT (truncf (-0.3f) == 0.0f);
67 ASSERT (truncf (-0.7f) == 0.0f);
68 ASSERT (truncf (-1.0f) == -1.0f);
69 ASSERT (truncf (-1.5f) == -1.0f);
70 ASSERT (truncf (-1.999f) == -1.0f);
71 ASSERT (truncf (-2.0f) == -2.0f);
72 ASSERT (truncf (-65535.99f) == -65535.0f);
73 ASSERT (truncf (-65536.0f) == -65536.0f);
74 ASSERT (truncf (-2.341e31f) == -2.341e31f);
75 /* Infinite numbers. */
76 ASSERT (truncf (1.0f / 0.0f) == 1.0f / 0.0f);
77 ASSERT (truncf (-1.0f / 0.0f) == -1.0f / 0.0f);
79 ASSERT (isnan (truncf (NaN ())));