lround_test.c revision 294243 
1/*-
2 * Copyright (c) 2005 David Schultz <das@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27/*
28 * Test for lround(), lroundf(), llround(), and llroundf().
29 */
30
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD: stable/10/lib/msun/tests/lround_test.c 294243 2016-01-18 03:55:40Z ngie $");
33
34#include <assert.h>
35#include <fenv.h>
36#include <limits.h>
37#include <math.h>
38#include <stdio.h>
39
40/*
41 * XXX The volatile here is to avoid gcc's bogus constant folding and work
42 *     around the lack of support for the FENV_ACCESS pragma.
43 */
44#define	test(func, x, result, excepts)	do {				\
45	volatile double _d = x;						\
46	assert(feclearexcept(FE_ALL_EXCEPT) == 0);			\
47	assert((func)(_d) == (result) || fetestexcept(FE_INVALID));	\
48	assert(fetestexcept(FE_ALL_EXCEPT) == (excepts));		\
49} while (0)
50
51#define	testall(x, result, excepts)	do {				\
52	test(lround, x, result, excepts);				\
53	test(lroundf, x, result, excepts);				\
54	test(llround, x, result, excepts);				\
55	test(llroundf, x, result, excepts);				\
56} while (0)
57
58#define	IGNORE	0
59
60#pragma STDC FENV_ACCESS ON
61
62int
63main(int argc, char *argv[])
64{
65
66	printf("1..1\n");
67
68	testall(0.0, 0, 0);
69	testall(0.25, 0, FE_INEXACT);
70	testall(0.5, 1, FE_INEXACT);
71	testall(-0.5, -1, FE_INEXACT);
72	testall(1.0, 1, 0);
73	testall(0x12345000p0, 0x12345000, 0);
74	testall(0x1234.fp0, 0x1235, FE_INEXACT);
75	testall(INFINITY, IGNORE, FE_INVALID);
76	testall(NAN, IGNORE, FE_INVALID);
77
78#if (LONG_MAX == 0x7fffffffl)
79	test(lround, 0x7fffffff.8p0, IGNORE, FE_INVALID);
80	test(lround, -0x80000000.8p0, IGNORE, FE_INVALID);
81	test(lround, 0x80000000.0p0, IGNORE, FE_INVALID);
82	test(lround, 0x7fffffff.4p0, 0x7fffffffl, FE_INEXACT);
83	test(lround, -0x80000000.4p0, -0x80000000l, FE_INEXACT);
84	test(lroundf, 0x80000000.0p0f, IGNORE, FE_INVALID);
85	test(lroundf, 0x7fffff80.0p0f, 0x7fffff80l, 0);
86#elif (LONG_MAX == 0x7fffffffffffffffll)
87	test(lround, 0x8000000000000000.0p0, IGNORE, FE_INVALID);
88	test(lroundf, 0x8000000000000000.0p0f, IGNORE, FE_INVALID);
89	test(lround, 0x7ffffffffffffc00.0p0, 0x7ffffffffffffc00l, 0);
90	test(lroundf, 0x7fffff8000000000.0p0f, 0x7fffff8000000000l, 0);
91	test(lround, -0x8000000000000800.0p0, IGNORE, FE_INVALID);
92	test(lroundf, -0x8000010000000000.0p0f, IGNORE, FE_INVALID);
93	test(lround, -0x8000000000000000.0p0, -0x8000000000000000l, 0);
94	test(lroundf, -0x8000000000000000.0p0f, -0x8000000000000000l, 0);
95#else
96#error "Unsupported long size"
97#endif
98
99#if (LLONG_MAX == 0x7fffffffffffffffLL)
100	test(llround, 0x8000000000000000.0p0, IGNORE, FE_INVALID);
101	test(llroundf, 0x8000000000000000.0p0f, IGNORE, FE_INVALID);
102	test(llround, 0x7ffffffffffffc00.0p0, 0x7ffffffffffffc00ll, 0);
103	test(llroundf, 0x7fffff8000000000.0p0f, 0x7fffff8000000000ll, 0);
104	test(llround, -0x8000000000000800.0p0, IGNORE, FE_INVALID);
105	test(llroundf, -0x8000010000000000.0p0f, IGNORE, FE_INVALID);
106	test(llround, -0x8000000000000000.0p0, -0x8000000000000000ll, 0);
107	test(llroundf, -0x8000000000000000.0p0f, -0x8000000000000000ll, 0);
108#else
109#error "Unsupported long long size"
110#endif
111
112	printf("ok 1 - lround\n");
113
114	return (0);
115}
116