1/* $NetBSD: t_tanh.c,v 1.7 2014/03/03 10:39:08 martin Exp $ */
2
3/*-
4 * Copyright (c) 2011 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jukka Ruohonen.
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_tanh.c,v 1.7 2014/03/03 10:39:08 martin Exp $");
33
34#include <atf-c.h>
35#include <math.h>
36
37/*
38 * tanh(3)
39 */
40ATF_TC(tanh_nan);
41ATF_TC_HEAD(tanh_nan, tc)
42{
43	atf_tc_set_md_var(tc, "descr", "Test tanh(NaN) == NaN");
44}
45
46ATF_TC_BODY(tanh_nan, tc)
47{
48	const double x = 0.0L / 0.0L;
49
50	ATF_CHECK(isnan(x) != 0);
51	ATF_CHECK(isnan(tanh(x)) != 0);
52}
53
54ATF_TC(tanh_inf_neg);
55ATF_TC_HEAD(tanh_inf_neg, tc)
56{
57	atf_tc_set_md_var(tc, "descr", "Test tanh(-Inf) == -1.0");
58}
59
60ATF_TC_BODY(tanh_inf_neg, tc)
61{
62	const double x = -1.0L / 0.0L;
63
64	ATF_CHECK(tanh(x) == -1.0);
65}
66
67ATF_TC(tanh_inf_pos);
68ATF_TC_HEAD(tanh_inf_pos, tc)
69{
70	atf_tc_set_md_var(tc, "descr", "Test tanh(+Inf) == +1.0");
71}
72
73ATF_TC_BODY(tanh_inf_pos, tc)
74{
75	const double x = 1.0L / 0.0L;
76
77	ATF_CHECK(tanh(x) == 1.0);
78}
79
80ATF_TC(tanh_zero_neg);
81ATF_TC_HEAD(tanh_zero_neg, tc)
82{
83	atf_tc_set_md_var(tc, "descr", "Test tanh(-0.0) == -0.0");
84}
85
86ATF_TC_BODY(tanh_zero_neg, tc)
87{
88	const double x = -0.0L;
89	double y = tanh(x);
90
91	ATF_CHECK(x == y);
92	ATF_CHECK(signbit(x) != 0);
93
94	ATF_REQUIRE_MSG(signbit(y) != 0,
95	    "compiler bug, waiting for newer gcc import, see PR lib/44057");
96}
97
98ATF_TC(tanh_zero_pos);
99ATF_TC_HEAD(tanh_zero_pos, tc)
100{
101	atf_tc_set_md_var(tc, "descr", "Test tanh(+0.0) == +0.0");
102}
103
104ATF_TC_BODY(tanh_zero_pos, tc)
105{
106	const double x = 0.0L;
107	double y = tanh(x);
108
109	ATF_CHECK(x == y);
110	ATF_CHECK(signbit(x) == 0);
111	ATF_CHECK(signbit(y) == 0);
112}
113
114/*
115 * tanhf(3)
116 */
117ATF_TC(tanhf_nan);
118ATF_TC_HEAD(tanhf_nan, tc)
119{
120	atf_tc_set_md_var(tc, "descr", "Test tanhf(NaN) == NaN");
121}
122
123ATF_TC_BODY(tanhf_nan, tc)
124{
125	const float x = 0.0L / 0.0L;
126
127	ATF_CHECK(isnan(x) != 0);
128	ATF_CHECK(isnan(tanhf(x)) != 0);
129}
130
131ATF_TC(tanhf_inf_neg);
132ATF_TC_HEAD(tanhf_inf_neg, tc)
133{
134	atf_tc_set_md_var(tc, "descr", "Test tanhf(-Inf) == -1.0");
135}
136
137ATF_TC_BODY(tanhf_inf_neg, tc)
138{
139	const float x = -1.0L / 0.0L;
140
141	ATF_CHECK(tanhf(x) == -1.0);
142}
143
144ATF_TC(tanhf_inf_pos);
145ATF_TC_HEAD(tanhf_inf_pos, tc)
146{
147	atf_tc_set_md_var(tc, "descr", "Test tanhf(+Inf) == +1.0");
148}
149
150ATF_TC_BODY(tanhf_inf_pos, tc)
151{
152	const float x = 1.0L / 0.0L;
153
154	ATF_CHECK(tanhf(x) == 1.0);
155}
156
157ATF_TC(tanhf_zero_neg);
158ATF_TC_HEAD(tanhf_zero_neg, tc)
159{
160	atf_tc_set_md_var(tc, "descr", "Test tanhf(-0.0) == -0.0");
161}
162
163ATF_TC_BODY(tanhf_zero_neg, tc)
164{
165	const float x = -0.0L;
166	float y = tanh(x);
167
168	ATF_CHECK(x == y);
169	ATF_CHECK(signbit(x) != 0);
170
171	ATF_REQUIRE_MSG(signbit(y) != 0,
172	    "compiler bug, waiting for newer gcc import, see PR lib/44057");
173}
174
175ATF_TC(tanhf_zero_pos);
176ATF_TC_HEAD(tanhf_zero_pos, tc)
177{
178	atf_tc_set_md_var(tc, "descr", "Test tanhf(+0.0) == +0.0");
179}
180
181ATF_TC_BODY(tanhf_zero_pos, tc)
182{
183	const float x = 0.0L;
184	float y = tanhf(x);
185
186	ATF_CHECK(x == y);
187	ATF_CHECK(signbit(x) == 0);
188	ATF_CHECK(signbit(y) == 0);
189}
190
191ATF_TP_ADD_TCS(tp)
192{
193
194	ATF_TP_ADD_TC(tp, tanh_nan);
195	ATF_TP_ADD_TC(tp, tanh_inf_neg);
196	ATF_TP_ADD_TC(tp, tanh_inf_pos);
197	ATF_TP_ADD_TC(tp, tanh_zero_neg);
198	ATF_TP_ADD_TC(tp, tanh_zero_pos);
199
200	ATF_TP_ADD_TC(tp, tanhf_nan);
201	ATF_TP_ADD_TC(tp, tanhf_inf_neg);
202	ATF_TP_ADD_TC(tp, tanhf_inf_pos);
203	ATF_TP_ADD_TC(tp, tanhf_zero_neg);
204	ATF_TP_ADD_TC(tp, tanhf_zero_pos);
205
206	return atf_no_error();
207}
208