1 /* Test of rounding to nearest, breaking ties away from 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 2, or (at your option)
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, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
18 /* Written by Ben Pfaff <blp@gnu.org>, 2007.
19 Based heavily on Bruno Haible's test-truncf.c. */
30 #define ASSERT(expr) \
35 fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
41 /* The Compaq (ex-DEC) C 6.4 compiler chokes on the expression 0.0 / 0.0. */
46 static float zero = 0.0f;
50 # define NaN() (0.0f / 0.0f)
57 ASSERT (roundf (0.0f) == 0.0f);
58 ASSERT (roundf (-0.0f) == 0.0f);
59 /* Positive numbers. */
60 ASSERT (roundf (0.3f) == 0.0f);
61 ASSERT (roundf (0.5f) == 1.0f);
62 ASSERT (roundf (0.7f) == 1.0f);
63 ASSERT (roundf (1.0f) == 1.0f);
64 ASSERT (roundf (1.5f) == 2.0f);
65 ASSERT (roundf (2.5f) == 3.0f);
66 ASSERT (roundf (1.999f) == 2.0f);
67 ASSERT (roundf (2.0f) == 2.0f);
68 ASSERT (roundf (65535.99f) == 65536.0f);
69 ASSERT (roundf (65536.0f) == 65536.0f);
70 ASSERT (roundf (65536.01f) == 65536.0f);
71 ASSERT (roundf (2.341e31f) == 2.341e31f);
72 /* Negative numbers. */
73 ASSERT (roundf (-0.3f) == 0.0f);
74 ASSERT (roundf (-0.5f) == -1.0f);
75 ASSERT (roundf (-0.7f) == -1.0f);
76 ASSERT (roundf (-1.0f) == -1.0f);
77 ASSERT (roundf (-1.5f) == -2.0f);
78 ASSERT (roundf (-2.5f) == -3.0f);
79 ASSERT (roundf (-1.999f) == -2.0f);
80 ASSERT (roundf (-2.0f) == -2.0f);
81 ASSERT (roundf (-65535.99f) == -65536.0f);
82 ASSERT (roundf (-65536.0f) == -65536.0f);
83 ASSERT (roundf (-65536.01f) == -65536.0f);
84 ASSERT (roundf (-2.341e31f) == -2.341e31f);
85 /* Infinite numbers. */
86 ASSERT (roundf (1.0 / 0.0f) == 1.0 / 0.0f);
87 ASSERT (roundf (-1.0 / 0.0f) == -1.0 / 0.0f);
89 ASSERT (isnanf (roundf (NaN ())));