1/* $NetBSD: t_sqrt.c,v 1.8 2018/11/07 03:59:36 riastradh 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_sqrt.c,v 1.8 2018/11/07 03:59:36 riastradh Exp $");
33
34#include <atf-c.h>
35#include <math.h>
36#include <float.h>
37#include <stdio.h>
38
39/*
40 * sqrt(3)
41 */
42ATF_TC(sqrt_nan);
43ATF_TC_HEAD(sqrt_nan, tc)
44{
45	atf_tc_set_md_var(tc, "descr", "Test sqrt(NaN) == NaN");
46}
47
48ATF_TC_BODY(sqrt_nan, tc)
49{
50	const double x = 0.0L / 0.0L;
51
52	ATF_CHECK(isnan(x) != 0);
53	ATF_CHECK(isnan(sqrt(x)) != 0);
54}
55
56ATF_TC(sqrt_pow);
57ATF_TC_HEAD(sqrt_pow, tc)
58{
59	atf_tc_set_md_var(tc, "descr", "Test sqrt(3) vs. pow(3)");
60}
61
62ATF_TC_BODY(sqrt_pow, tc)
63{
64	const double x[] = { 0.0, 0.005, 1.0, 99.0, 123.123, 9999.9999 };
65	const double eps = DBL_EPSILON;
66	size_t i;
67
68	for (i = 0; i < __arraycount(x); i++) {
69		double x_sqrt = sqrt(x[i]);
70		double x_pow12 = pow(x[i], 1.0 / 2.0);
71		bool ok;
72
73		if (x[i] == 0) {
74			ok = (x_sqrt == x_pow12);
75		} else {
76			ok = (fabs((x_sqrt - x_pow12)/x_sqrt) <= eps);
77		}
78
79		if (!ok) {
80			atf_tc_fail_nonfatal("sqrt(%.17g) = %.17g != "
81			    "pow(%.17g, 1/2) = %.17g\n",
82			    x[i], x_sqrt, x[i], x_pow12);
83		}
84	}
85}
86
87ATF_TC(sqrt_inf_neg);
88ATF_TC_HEAD(sqrt_inf_neg, tc)
89{
90	atf_tc_set_md_var(tc, "descr", "Test sqrt(-Inf) == NaN");
91}
92
93ATF_TC_BODY(sqrt_inf_neg, tc)
94{
95	const double x = -1.0L / 0.0L;
96	double y = sqrt(x);
97
98	ATF_CHECK(isnan(y) != 0);
99}
100
101ATF_TC(sqrt_inf_pos);
102ATF_TC_HEAD(sqrt_inf_pos, tc)
103{
104	atf_tc_set_md_var(tc, "descr", "Test sqrt(+Inf) == +Inf");
105}
106
107ATF_TC_BODY(sqrt_inf_pos, tc)
108{
109	const double x = 1.0L / 0.0L;
110	double y = sqrt(x);
111
112	ATF_CHECK(isinf(y) != 0);
113	ATF_CHECK(signbit(y) == 0);
114}
115
116ATF_TC(sqrt_zero_neg);
117ATF_TC_HEAD(sqrt_zero_neg, tc)
118{
119	atf_tc_set_md_var(tc, "descr", "Test sqrt(-0.0) == -0.0");
120}
121
122ATF_TC_BODY(sqrt_zero_neg, tc)
123{
124	const double x = -0.0L;
125	double y = sqrt(x);
126
127	if (fabs(y) > 0.0 || signbit(y) == 0)
128		atf_tc_fail_nonfatal("sqrt(-0.0) != -0.0");
129}
130
131ATF_TC(sqrt_zero_pos);
132ATF_TC_HEAD(sqrt_zero_pos, tc)
133{
134	atf_tc_set_md_var(tc, "descr", "Test sqrt(+0.0) == +0.0");
135}
136
137ATF_TC_BODY(sqrt_zero_pos, tc)
138{
139	const double x = 0.0L;
140	double y = sqrt(x);
141
142	if (fabs(y) > 0.0 || signbit(y) != 0)
143		atf_tc_fail_nonfatal("sqrt(+0.0) != +0.0");
144}
145
146/*
147 * sqrtf(3)
148 */
149ATF_TC(sqrtf_nan);
150ATF_TC_HEAD(sqrtf_nan, tc)
151{
152	atf_tc_set_md_var(tc, "descr", "Test sqrtf(NaN) == NaN");
153}
154
155ATF_TC_BODY(sqrtf_nan, tc)
156{
157	const float x = 0.0L / 0.0L;
158
159	ATF_CHECK(isnan(x) != 0);
160	ATF_CHECK(isnan(sqrtf(x)) != 0);
161}
162
163ATF_TC(sqrtf_powf);
164ATF_TC_HEAD(sqrtf_powf, tc)
165{
166	atf_tc_set_md_var(tc, "descr", "Test sqrtf(3) vs. powf(3)");
167}
168
169ATF_TC_BODY(sqrtf_powf, tc)
170{
171	const float x[] = { 0.0, 0.005, 1.0, 99.0, 123.123, 9999.9999 };
172	const float eps = FLT_EPSILON;
173	size_t i;
174
175	for (i = 0; i < __arraycount(x); i++) {
176		float x_sqrt = sqrtf(x[i]);
177		float x_pow12 = powf(x[i], 1.0 / 2.0);
178		bool ok;
179
180		if (x[i] == 0) {
181			ok = (x_sqrt == x_pow12);
182		} else {
183			ok = (fabsf((x_sqrt - x_pow12)/x_sqrt) <= eps);
184		}
185
186		if (!ok) {
187			atf_tc_fail_nonfatal("sqrtf(%.8g) = %.8g != "
188			    "powf(%.8g, 1/2) = %.8g\n",
189			    (double)x[i], (double)x_sqrt,
190			    (double)x[i], (double)x_pow12);
191		}
192	}
193}
194
195ATF_TC(sqrtf_inf_neg);
196ATF_TC_HEAD(sqrtf_inf_neg, tc)
197{
198	atf_tc_set_md_var(tc, "descr", "Test sqrtf(-Inf) == NaN");
199}
200
201ATF_TC_BODY(sqrtf_inf_neg, tc)
202{
203	const float x = -1.0L / 0.0L;
204	float y = sqrtf(x);
205
206	ATF_CHECK(isnan(y) != 0);
207}
208
209ATF_TC(sqrtf_inf_pos);
210ATF_TC_HEAD(sqrtf_inf_pos, tc)
211{
212	atf_tc_set_md_var(tc, "descr", "Test sqrtf(+Inf) == +Inf");
213}
214
215ATF_TC_BODY(sqrtf_inf_pos, tc)
216{
217	const float x = 1.0L / 0.0L;
218	float y = sqrtf(x);
219
220	ATF_CHECK(isinf(y) != 0);
221	ATF_CHECK(signbit(y) == 0);
222}
223
224ATF_TC(sqrtf_zero_neg);
225ATF_TC_HEAD(sqrtf_zero_neg, tc)
226{
227	atf_tc_set_md_var(tc, "descr", "Test sqrtf(-0.0) == -0.0");
228}
229
230ATF_TC_BODY(sqrtf_zero_neg, tc)
231{
232	const float x = -0.0L;
233	float y = sqrtf(x);
234
235	if (fabsf(y) > 0.0 || signbit(y) == 0)
236		atf_tc_fail_nonfatal("sqrtf(-0.0) != -0.0");
237}
238
239ATF_TC(sqrtf_zero_pos);
240ATF_TC_HEAD(sqrtf_zero_pos, tc)
241{
242	atf_tc_set_md_var(tc, "descr", "Test sqrtf(+0.0) == +0.0");
243}
244
245ATF_TC_BODY(sqrtf_zero_pos, tc)
246{
247	const float x = 0.0L;
248	float y = sqrtf(x);
249
250	if (fabsf(y) > 0.0 || signbit(y) != 0)
251		atf_tc_fail_nonfatal("sqrtf(+0.0) != +0.0");
252}
253
254/*
255 * sqrtl(3)
256 */
257ATF_TC(sqrtl_nan);
258ATF_TC_HEAD(sqrtl_nan, tc)
259{
260	atf_tc_set_md_var(tc, "descr", "Test sqrtl(NaN) == NaN");
261}
262
263ATF_TC_BODY(sqrtl_nan, tc)
264{
265	const long double x = 0.0L / 0.0L;
266
267	ATF_CHECK(isnan(x) != 0);
268	ATF_CHECK(isnan(sqrtl(x)) != 0);
269}
270
271ATF_TC(sqrtl_powl);
272ATF_TC_HEAD(sqrtl_powl, tc)
273{
274	atf_tc_set_md_var(tc, "descr", "Test sqrtl(3) vs. powl(3)");
275}
276
277ATF_TC_BODY(sqrtl_powl, tc)
278{
279	const long double x[] = { 0.0, 0.005, 1.0, 99.0, 123.123, 9999.9999 };
280	const long double eps = DBL_EPSILON; /* XXX powl == pow for now */
281	size_t i;
282
283	for (i = 0; i < __arraycount(x); i++) {
284		long double x_sqrt = sqrtl(x[i]);
285		long double x_pow12 = powl(x[i], 1.0 / 2.0);
286		bool ok;
287
288		if (x[i] == 0) {
289			ok = (x_sqrt == x_pow12);
290		} else {
291			ok = (fabsl((x_sqrt - x_pow12)/x_sqrt) <= eps);
292		}
293
294		if (!ok) {
295			atf_tc_fail_nonfatal("sqrtl(%.35Lg) = %.35Lg != "
296			    "powl(%.35Lg, 1/2) = %.35Lg\n",
297			    x[i], x_sqrt, x[i], x_pow12);
298		}
299	}
300}
301
302ATF_TC(sqrtl_inf_neg);
303ATF_TC_HEAD(sqrtl_inf_neg, tc)
304{
305	atf_tc_set_md_var(tc, "descr", "Test sqrtl(-Inf) == NaN");
306}
307
308ATF_TC_BODY(sqrtl_inf_neg, tc)
309{
310	const long double x = -1.0L / 0.0L;
311	long double y = sqrtl(x);
312
313	ATF_CHECK(isnan(y) != 0);
314}
315
316ATF_TC(sqrtl_inf_pos);
317ATF_TC_HEAD(sqrtl_inf_pos, tc)
318{
319	atf_tc_set_md_var(tc, "descr", "Test sqrtl(+Inf) == +Inf");
320}
321
322ATF_TC_BODY(sqrtl_inf_pos, tc)
323{
324	const long double x = 1.0L / 0.0L;
325	long double y = sqrtl(x);
326
327	ATF_CHECK(isinf(y) != 0);
328	ATF_CHECK(signbit(y) == 0);
329}
330
331ATF_TC(sqrtl_zero_neg);
332ATF_TC_HEAD(sqrtl_zero_neg, tc)
333{
334	atf_tc_set_md_var(tc, "descr", "Test sqrtl(-0.0) == -0.0");
335}
336
337ATF_TC_BODY(sqrtl_zero_neg, tc)
338{
339	const long double x = -0.0L;
340	long double y = sqrtl(x);
341
342	if (fabsl(y) > 0.0 || signbit(y) == 0)
343		atf_tc_fail_nonfatal("sqrtl(-0.0) != -0.0");
344}
345
346ATF_TC(sqrtl_zero_pos);
347ATF_TC_HEAD(sqrtl_zero_pos, tc)
348{
349	atf_tc_set_md_var(tc, "descr", "Test sqrtl(+0.0) == +0.0");
350}
351
352ATF_TC_BODY(sqrtl_zero_pos, tc)
353{
354	const long double x = 0.0L;
355	long double y = sqrtl(x);
356
357	if (fabsl(y) > 0.0 || signbit(y) != 0)
358		atf_tc_fail_nonfatal("sqrtl(+0.0) != +0.0");
359}
360
361ATF_TP_ADD_TCS(tp)
362{
363
364	ATF_TP_ADD_TC(tp, sqrt_nan);
365	ATF_TP_ADD_TC(tp, sqrt_pow);
366	ATF_TP_ADD_TC(tp, sqrt_inf_neg);
367	ATF_TP_ADD_TC(tp, sqrt_inf_pos);
368	ATF_TP_ADD_TC(tp, sqrt_zero_neg);
369	ATF_TP_ADD_TC(tp, sqrt_zero_pos);
370
371	ATF_TP_ADD_TC(tp, sqrtf_nan);
372	ATF_TP_ADD_TC(tp, sqrtf_powf);
373	ATF_TP_ADD_TC(tp, sqrtf_inf_neg);
374	ATF_TP_ADD_TC(tp, sqrtf_inf_pos);
375	ATF_TP_ADD_TC(tp, sqrtf_zero_neg);
376	ATF_TP_ADD_TC(tp, sqrtf_zero_pos);
377
378	ATF_TP_ADD_TC(tp, sqrtl_nan);
379	ATF_TP_ADD_TC(tp, sqrtl_powl);
380	ATF_TP_ADD_TC(tp, sqrtl_inf_neg);
381	ATF_TP_ADD_TC(tp, sqrtl_inf_pos);
382	ATF_TP_ADD_TC(tp, sqrtl_zero_neg);
383	ATF_TP_ADD_TC(tp, sqrtl_zero_pos);
384
385	return atf_no_error();
386}
387