1/* $NetBSD: t_atan.c,v 1.15 2014/03/17 11:08:11 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
32#include <atf-c.h>
33#include <math.h>
34#include "t_libm.h"
35
36static const struct {
37	double x;
38	double y;
39} values[] = {
40#ifndef __vax__
41	/* vax has no +/- INF */
42	{ T_LIBM_MINUS_INF, -M_PI / 2 },
43	{ T_LIBM_PLUS_INF,   M_PI / 2 },
44#endif
45	{ -100, -1.560796660108231, },
46	{  -10, -1.471127674303735, },
47	{   -1, -M_PI / 4, },
48	{ -0.1, -0.09966865249116204, },
49	{  0.1,  0.09966865249116204, },
50	{    1,  M_PI / 4, },
51	{   10,  1.471127674303735, },
52	{  100,  1.560796660108231, },
53};
54
55/*
56 * atan(3)
57 */
58ATF_LIBM_TEST(atan_nan, "Test atan/atanf(NaN) == NaN")
59{
60#ifdef T_LIBM_NAN
61	T_LIBM_CHECK_NAN(0, atan, T_LIBM_NAN);
62	T_LIBM_CHECK_NAN(0, atanf, T_LIBM_NAN);
63#else
64	atf_tc_skip("no NaN on this machine");
65#endif
66}
67
68ATF_LIBM_TEST(atan_inrange, "Test atan/atanf(x) for some values")
69{
70	unsigned int i;
71
72	for (i = 0; i < __arraycount(values); i++) {
73		T_LIBM_CHECK(i, atan, values[i].x, values[i].y, 1.0e-15);
74		T_LIBM_CHECK(i, atanf, values[i].x, values[i].y, 1.0e-7);
75	}
76}
77
78ATF_LIBM_TEST(atan_zero_neg, "Test atan/atanf(-0.0) == -0.0")
79{
80
81	T_LIBM_CHECK_MINUS_ZERO(0, atan, -0.0);
82	T_LIBM_CHECK_MINUS_ZERO(0, atanf, -0.0);
83}
84
85ATF_LIBM_TEST(atan_zero_pos, "Test atan/atanf(+0.0) == +0.0")
86{
87
88	T_LIBM_CHECK_PLUS_ZERO(0, atan, +0.0);
89	T_LIBM_CHECK_PLUS_ZERO(0, atanf, +0.0);
90}
91
92ATF_TP_ADD_TCS(tp)
93{
94
95	ATF_TP_ADD_TC(tp, atan_nan);
96	ATF_TP_ADD_TC(tp, atan_inrange);
97	ATF_TP_ADD_TC(tp, atan_zero_neg);
98	ATF_TP_ADD_TC(tp, atan_zero_pos);
99
100	return atf_no_error();
101}
102