1/*-
2 * Copyright (c) 2008 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 * Tests for fmax{,f,l}() and fmin{,f,l}.
29 */
30
31#include <sys/cdefs.h>
32#include <fenv.h>
33#include <float.h>
34#include <math.h>
35#include <stdio.h>
36
37#include "test-utils.h"
38
39#pragma STDC FENV_ACCESS ON
40
41/*
42 * Test whether func(x, y) has the expected result, and make sure no
43 * exceptions are raised.
44 */
45#define	TEST(func, type, x, y, expected, rmode) do {			      \
46	type __x = (x);	/* convert before we clear exceptions */	      \
47	type __y = (y);							      \
48	ATF_REQUIRE_EQ(0, feclearexcept(ALL_STD_EXCEPT));		      \
49	long double __result = func((__x), (__y));			      \
50	CHECK_FP_EXCEPTIONS_MSG(0, ALL_STD_EXCEPT,			      \
51	    #func "(%.20Lg, %.20Lg) rmode%d", (x), (y), rmode);		      \
52	ATF_CHECK_MSG(fpequal_cs(__result, (expected), true),		      \
53	    #func "(%.20Lg, %.20Lg) rmode%d = %.20Lg, expected %.20Lg\n",     \
54	    (x), (y), rmode, __result, (expected));			      \
55} while (0)
56
57static void
58testall_r(long double big, long double small, int rmode)
59{
60	long double expected_max = isnan(big) ? small : big;
61	long double expected_min = isnan(small) ? big : small;
62	TEST(fmaxf, float, big, small, expected_max, rmode);
63	TEST(fmaxf, float, small, big, expected_max, rmode);
64	TEST(fmax, double, big, small, expected_max, rmode);
65	TEST(fmax, double, small, big, expected_max, rmode);
66	TEST(fmaxl, long double, big, small, expected_max, rmode);
67	TEST(fmaxl, long double, small, big, expected_max, rmode);
68	TEST(fminf, float, big, small, expected_min, rmode);
69	TEST(fminf, float, small, big, expected_min, rmode);
70	TEST(fmin, double, big, small, expected_min, rmode);
71	TEST(fmin, double, small, big, expected_min, rmode);
72	TEST(fminl, long double, big, small, expected_min, rmode);
73	TEST(fminl, long double, small, big, expected_min, rmode);
74}
75
76/*
77 * Test all the functions: fmaxf, fmax, fmaxl, fminf, fmin, and fminl,
78 * in all rounding modes and with the arguments in different orders.
79 * The input 'big' must be >= 'small'.
80 */
81static void
82testall(long double big, long double small)
83{
84	static const int rmodes[] = {
85		FE_TONEAREST, FE_UPWARD, FE_DOWNWARD, FE_TOWARDZERO
86	};
87	int i;
88
89	for (i = 0; i < 4; i++) {
90		fesetround(rmodes[i]);
91		testall_r(big, small, rmodes[i]);
92	}
93}
94
95ATF_TC_WITHOUT_HEAD(test1);
96ATF_TC_BODY(test1, tc)
97{
98	testall(1.0, 0.0);
99}
100
101ATF_TC_WITHOUT_HEAD(test2);
102ATF_TC_BODY(test2, tc)
103{
104	testall(42.0, nextafterf(42.0, -INFINITY));
105}
106ATF_TC_WITHOUT_HEAD(test3);
107ATF_TC_BODY(test3, tc)
108{
109	testall(nextafterf(42.0, INFINITY), 42.0);
110}
111
112ATF_TC_WITHOUT_HEAD(test4);
113ATF_TC_BODY(test4, tc)
114{
115	testall(-5.0, -5.0);
116}
117
118ATF_TC_WITHOUT_HEAD(test5);
119ATF_TC_BODY(test5, tc)
120{
121	testall(-3.0, -4.0);
122}
123
124ATF_TC_WITHOUT_HEAD(test6);
125ATF_TC_BODY(test6, tc)
126{
127	testall(1.0, NAN);
128}
129ATF_TC_WITHOUT_HEAD(test7);
130ATF_TC_BODY(test7, tc)
131{
132	testall(INFINITY, NAN);
133}
134
135ATF_TC_WITHOUT_HEAD(test8);
136ATF_TC_BODY(test8, tc)
137{
138	testall(INFINITY, 1.0);
139}
140
141ATF_TC_WITHOUT_HEAD(test9);
142ATF_TC_BODY(test9, tc)
143{
144	testall(-3.0, -INFINITY);
145}
146
147ATF_TC_WITHOUT_HEAD(test10);
148ATF_TC_BODY(test10, tc)
149{
150	testall(3.0, -INFINITY);
151}
152
153ATF_TC_WITHOUT_HEAD(test11);
154ATF_TC_BODY(test11, tc)
155{
156	testall(NAN, NAN);
157}
158
159ATF_TC_WITHOUT_HEAD(test12);
160ATF_TC_BODY(test12, tc)
161{
162	/* This test isn't strictly required to work by C99. */
163	testall(0.0, -0.0);
164}
165
166
167ATF_TP_ADD_TCS(tp)
168{
169	ATF_TP_ADD_TC(tp, test1);
170	ATF_TP_ADD_TC(tp, test2);
171	ATF_TP_ADD_TC(tp, test3);
172	ATF_TP_ADD_TC(tp, test4);
173	ATF_TP_ADD_TC(tp, test5);
174	ATF_TP_ADD_TC(tp, test6);
175	ATF_TP_ADD_TC(tp, test7);
176	ATF_TP_ADD_TC(tp, test8);
177	ATF_TP_ADD_TC(tp, test9);
178	ATF_TP_ADD_TC(tp, test10);
179	ATF_TP_ADD_TC(tp, test11);
180	ATF_TP_ADD_TC(tp, test12);
181
182	return (atf_no_error());
183}
184