t_infinity.c revision 1.4 
1/* $NetBSD: t_infinity.c,v 1.4 2011/07/07 11:04:30 jruoho Exp $ */
2
3/*-
4 * Copyright (c) 2002, 2008 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Martin Husemann <martin@NetBSD.org>.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31#include <sys/cdefs.h>
32__RCSID("$NetBSD: t_infinity.c,v 1.4 2011/07/07 11:04:30 jruoho Exp $");
33
34#include <sys/utsname.h>
35
36#include <atf-c.h>
37#include <math.h>
38#include <float.h>
39#include <stdlib.h>
40#include <string.h>
41
42ATF_TC(infinity_float);
43ATF_TC_HEAD(infinity_float, tc)
44{
45	atf_tc_set_md_var(tc, "descr",
46	     "check FPU generated infinite float values");
47}
48
49ATF_TC_BODY(infinity_float, tc)
50{
51	float v;
52
53	v = FLT_MAX;
54	v *= v;
55	ATF_REQUIRE(isinf(v));
56	ATF_REQUIRE(fpclassify(v) == FP_INFINITE);
57
58	v = -FLT_MAX;
59	v *= v;
60	ATF_REQUIRE(isinf(v));
61	ATF_REQUIRE(fpclassify(v) == FP_INFINITE);
62}
63
64ATF_TC(infinity_double);
65ATF_TC_HEAD(infinity_double, tc)
66{
67	atf_tc_set_md_var(tc, "descr",
68	     "check FPU generated infinite double values");
69}
70
71ATF_TC_BODY(infinity_double, tc)
72{
73	double v;
74
75	v = DBL_MAX;
76	v *= v;
77	ATF_REQUIRE(isinf(v));
78	ATF_REQUIRE(fpclassify(v) == FP_INFINITE);
79
80	v = -DBL_MAX;
81	v *= v;
82	ATF_REQUIRE(isinf(v));
83	ATF_REQUIRE(fpclassify(v) == FP_INFINITE);
84}
85
86ATF_TC(infinity_long_double);
87ATF_TC_HEAD(infinity_long_double, tc)
88{
89	atf_tc_set_md_var(tc, "descr",
90	     "check FPU generated infinite long double values");
91}
92
93ATF_TC_BODY(infinity_long_double, tc)
94{
95	struct utsname utsname;
96
97	/*
98	 * May fail under QEMU; cf. PR misc/44767.
99	 */
100	ATF_REQUIRE(uname(&utsname) == 0);
101
102	if (strcmp(utsname.machine, "amd64") == 0 &&
103	    system("cpuctl identify 0 | grep -q QEMU") == 0)
104		atf_tc_expect_fail("PR misc/44767");
105
106#ifndef LDBL_MAX
107	atf_tc_skip("no long double support on this architecture");
108	return;
109#else
110	long double v;
111
112	v = LDBL_MAX;
113	v *= v;
114	ATF_REQUIRE(isinf(v));
115	ATF_REQUIRE(fpclassify(v) == FP_INFINITE);
116
117	v = -LDBL_MAX;
118	v *= v;
119	ATF_REQUIRE(isinf(v));
120	ATF_REQUIRE(fpclassify(v) == FP_INFINITE);
121#endif
122}
123
124ATF_TP_ADD_TCS(tp)
125{
126
127	ATF_TP_ADD_TC(tp, infinity_float);
128	ATF_TP_ADD_TC(tp, infinity_double);
129	ATF_TP_ADD_TC(tp, infinity_long_double);
130
131	return atf_no_error();
132}
133