xref: /minix/tests/lib/libm/t_exp.c (revision 0a6a1f1d)
1 /* $NetBSD: t_exp.c,v 1.8 2014/10/07 16:53:44 gson 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 
36 /* y = exp(x) */
37 static const struct {
38 	double x;
39 	double y;
40 	double e;
41 } exp_values[] = {
42 	{  -10, 0.4539992976248485e-4, 1e-4, },
43 	{   -5, 0.6737946999085467e-2, 1e-2, },
44 	{   -1, 0.3678794411714423,    1e-1, },
45 	{ -0.1, 0.9048374180359595,    1e-1, },
46 	{    0, 1.0000000000000000,    1,    },
47 	{  0.1, 1.1051709180756477,    1,    },
48 	{    1, 2.7182818284590452,    1,    },
49 	{    5, 148.41315910257660,    1e2, },
50 	{   10, 22026.465794806718,    1e4, },
51 };
52 
53 /*
54  * exp2/exp2f(3)
55  */
56 ATF_LIBM_TEST(exp2_is_nan, "Test exp2(x) == NaN")
57 {
58 #ifdef T_LIBM_NAN
59 	T_LIBM_CHECK_NAN(0, exp2, T_LIBM_NAN);
60 	T_LIBM_CHECK_NAN(0, exp2f, T_LIBM_NAN);
61 #else
62 	atf_tc_skip("no NaN on this machine");
63 #endif
64 }
65 
66 ATF_LIBM_TEST(exp2_is_plus_zero, "Test exp2(x) == +0.0")
67 {
68 #ifdef T_LIBM_MINUS_INF
69 	T_LIBM_CHECK_PLUS_ZERO(0, exp2, T_LIBM_MINUS_INF);
70 	T_LIBM_CHECK_PLUS_ZERO(0, exp2f, T_LIBM_MINUS_INF);
71 #else
72 	atf_tc_skip("no +/-Inf on this machine");
73 #endif
74 }
75 
76 ATF_LIBM_TEST(exp2_powers, "Test exp2(x) is correct for some integer x")
77 {
78 	static const struct {
79 		double	x;
80 		double	d_y;
81 		double	f_y;
82 	} v[] = {
83 	    { +0.0,	1.0,	1.0 },
84 	    { -0.0,	1.0,	1.0 },
85 	    {    1,	0x1p1,	0x1p1 },
86 	    {    2,	0x1p2,	0x1p2 },
87 	    {  100,	0x1p100,	0x1p100 },
88 	    {  125,	0x1p125,	0x1p125 },
89 	    {  126,	0x1p126,	0x1p126 },
90 #if __DBL_MAX_EXP__ > 129
91 	    {  127,	0x1p127,	0x1p127 },
92 #endif
93 #ifdef T_LIBM_PLUS_INF
94 	    {  128,	0x1p128,	T_LIBM_PLUS_INF },
95 	    {  129,	0x1p129,	T_LIBM_PLUS_INF },
96 	    { 1000,	0x1p1000,	T_LIBM_PLUS_INF },
97 	    { 1020,	0x1p1020,	T_LIBM_PLUS_INF },
98 	    { 1023,	0x1p1023,	T_LIBM_PLUS_INF },
99 	    { 1024,	T_LIBM_PLUS_INF,	T_LIBM_PLUS_INF },
100 	    { 1030,	T_LIBM_PLUS_INF,	T_LIBM_PLUS_INF },
101 	    { 1050,	T_LIBM_PLUS_INF,	T_LIBM_PLUS_INF },
102 	    { 2000,	T_LIBM_PLUS_INF,	T_LIBM_PLUS_INF },
103 	    { 16383,	T_LIBM_PLUS_INF,	T_LIBM_PLUS_INF },
104 	    { 16384,	T_LIBM_PLUS_INF,	T_LIBM_PLUS_INF },
105 	    { 16385,	T_LIBM_PLUS_INF,	T_LIBM_PLUS_INF },
106 #endif
107 	    {   -1,	0x1p-1,	0x1p-1 },
108 	    {   -2,	0x1p-2,	0x1p-2 },
109 	    { -100,	0x1p-100,	0x1p-100 },
110 	    { -127,	0x1p-127,	0x1p-127 },
111 	    { -128,	0x1p-128,	0x1p-128 },
112 #if __LDBL_MIN_EXP__ < -129
113 	    { -300,	0x1p-300,	0.0},
114 	    { -400,	0x1p-400,	0.0},
115 	    {-1000,	0x1p-1000,	0.0},
116 	    {-1022,	0x1p-1022,	0.0},
117 	    /* These should be denormal numbers */
118 	    {-1023,	0x1p-1023,	0.0},
119 	    {-1024,	0x1p-1024,	0.0},
120 	    {-1040,	0x1p-1040,	0.0},
121 	    {-1060,	0x1p-1060,	0.0},
122 	    /* This is the smallest result gcc will allow */
123 	    {-1074,	0x1p-1074,	0.0},
124 #endif
125 	    {-1075,	0x0,	0.0},
126 	    {-1080,	0x0,	0.0},
127 	    {-2000,	0x0,	0.0},
128 	    {-16382,	0x0,	0.0},
129 	    {-16383,	0x0,	0.0},
130 	    {-16384,	0x0,	0.0},
131 	};
132 	unsigned int i;
133 
134 	for (i = 0; i < __arraycount(v); i++) {
135 		T_LIBM_CHECK(i, exp2, v[i].x, v[i].d_y, 0.0);
136 		T_LIBM_CHECK(i, exp2f, v[i].x, v[i].f_y, 0.0);
137 	}
138 }
139 
140 ATF_LIBM_TEST(exp2_values, "Test exp2(x) is correct for some x")
141 {
142 	static const struct {
143 		double	x;
144 		double	d_y;
145 		float   f_y;
146 		double	d_eps;
147 		double	f_eps;
148 	} v[] = {
149 #if __DBL_MAX_EXP__ > 128
150 	    /* The largest double constant */
151 	    { 0x1.fffffffffffffp9,	0x1.ffffffffffd3ap1023,	0.00,
152 		0x1p969,	0.0 },
153 	    /* The largest float constant */
154 	    { 0x1.fffffep6,	0x1.ffff4ep+127,	0x1.ffff4ep+127,	6e30,	0.0 },
155 #endif
156 #ifdef T_LIBM_PLUS_INF
157 	    { T_LIBM_PLUS_INF,	T_LIBM_PLUS_INF,	T_LIBM_PLUS_INF,	0.0,	0.0 },
158 #endif
159 
160 	    /* The few values from the old tests */
161 	    /* Results from i386/amd64, d_eps needed on i386 */
162 	    /* f_y values calculated using py-mpmath */
163 	    {  1.1,	0x1.125fbee250664p+1,	0x1.125fc0p+1,	0x1p-52,	0x1.8p-22 },
164 	    {  2.2,	0x1.2611186bae675p+2,	0x1.26111ap+2,	0x1p-51,	0x1.8p-21 },
165 	    {  3.3,	0x1.3b2c47bff8328p+3,	0x1.3b2c48p+3,	0x1p-50,	0x1.8p-20 },
166 	    {  4.4,	0x1.51cb453b9536ep+4,	0x1.51cb46p+4,	0x1p-49,	0x1.8p-19 },
167 	    {  5.5,	0x1.6a09e667f3bcdp+5,	0x1.6a09e6p+5,	0x1p-48,	0x1.8p-18 },
168 	    {  6.6,	0x1.8406003b2ae5bp+6,	0x1.8405fep+6,	0x1p-47,	0x1.8p-17 },
169 	    {  7.7,	0x1.9fdf8bcce533ep+7,	0x1.9fdf88p+7,	0x1p-46,	0x1.8p-16 },
170 	    {  8.8,	0x1.bdb8cdadbe124p+8,	0x1.bdb8d2p+8,	0x1p-45,	0x1.8p-15 },
171 	};
172 	unsigned int i;
173 
174 	for (i = 0; i < __arraycount(v); i++) {
175 		T_LIBM_CHECK(i, exp2, v[i].x, v[i].d_y, v[i].d_eps);
176 		if (i > 1)
177 			T_LIBM_CHECK(i, exp2f, v[i].x, v[i].f_y, v[i].f_eps);
178 	}
179 }
180 
181 
182 /*
183  * exp(3)
184  */
185 ATF_TC(exp_nan);
ATF_TC_HEAD(exp_nan,tc)186 ATF_TC_HEAD(exp_nan, tc)
187 {
188 	atf_tc_set_md_var(tc, "descr", "Test exp(NaN) == NaN");
189 }
190 
ATF_TC_BODY(exp_nan,tc)191 ATF_TC_BODY(exp_nan, tc)
192 {
193 	const double x = 0.0L / 0.0L;
194 
195 	if (isnan(exp(x)) == 0)
196 		atf_tc_fail_nonfatal("exp(NaN) != NaN");
197 }
198 
199 ATF_TC(exp_inf_neg);
ATF_TC_HEAD(exp_inf_neg,tc)200 ATF_TC_HEAD(exp_inf_neg, tc)
201 {
202 	atf_tc_set_md_var(tc, "descr", "Test exp(-Inf) == +0.0");
203 }
204 
ATF_TC_BODY(exp_inf_neg,tc)205 ATF_TC_BODY(exp_inf_neg, tc)
206 {
207 	const double x = -1.0L / 0.0L;
208 	double y = exp(x);
209 
210 	if (fabs(y) > 0.0 || signbit(y) != 0)
211 		atf_tc_fail_nonfatal("exp(-Inf) != +0.0");
212 }
213 
214 ATF_TC(exp_inf_pos);
ATF_TC_HEAD(exp_inf_pos,tc)215 ATF_TC_HEAD(exp_inf_pos, tc)
216 {
217 	atf_tc_set_md_var(tc, "descr", "Test exp(+Inf) == +Inf");
218 }
219 
ATF_TC_BODY(exp_inf_pos,tc)220 ATF_TC_BODY(exp_inf_pos, tc)
221 {
222 	const double x = 1.0L / 0.0L;
223 	double y = exp(x);
224 
225 	if (isinf(y) == 0 || signbit(y) != 0)
226 		atf_tc_fail_nonfatal("exp(+Inf) != +Inf");
227 }
228 
229 ATF_TC(exp_product);
ATF_TC_HEAD(exp_product,tc)230 ATF_TC_HEAD(exp_product, tc)
231 {
232 	atf_tc_set_md_var(tc, "descr", "Test some selected exp(x)");
233 }
234 
ATF_TC_BODY(exp_product,tc)235 ATF_TC_BODY(exp_product, tc)
236 {
237 	double eps;
238 	double x;
239 	double y;
240 	size_t i;
241 
242 	for (i = 0; i < __arraycount(exp_values); i++) {
243 		x = exp_values[i].x;
244 		y = exp_values[i].y;
245 		eps = 1e-15 * exp_values[i].e;
246 
247 		if (fabs(exp(x) - y) > eps)
248 			atf_tc_fail_nonfatal("exp(%0.01f) != %18.18e", x, y);
249 	}
250 }
251 
252 ATF_TC(exp_zero_neg);
ATF_TC_HEAD(exp_zero_neg,tc)253 ATF_TC_HEAD(exp_zero_neg, tc)
254 {
255 	atf_tc_set_md_var(tc, "descr", "Test exp(-0.0) == 1.0");
256 }
257 
ATF_TC_BODY(exp_zero_neg,tc)258 ATF_TC_BODY(exp_zero_neg, tc)
259 {
260 	const double x = -0.0L;
261 
262 	if (fabs(exp(x) - 1.0) > 0.0)
263 		atf_tc_fail_nonfatal("exp(-0.0) != 1.0");
264 }
265 
266 ATF_TC(exp_zero_pos);
ATF_TC_HEAD(exp_zero_pos,tc)267 ATF_TC_HEAD(exp_zero_pos, tc)
268 {
269 	atf_tc_set_md_var(tc, "descr", "Test exp(+0.0) == 1.0");
270 }
271 
ATF_TC_BODY(exp_zero_pos,tc)272 ATF_TC_BODY(exp_zero_pos, tc)
273 {
274 	const double x = 0.0L;
275 
276 	if (fabs(exp(x) - 1.0) > 0.0)
277 		atf_tc_fail_nonfatal("exp(+0.0) != 1.0");
278 }
279 
280 /*
281  * expf(3)
282  */
283 ATF_TC(expf_nan);
ATF_TC_HEAD(expf_nan,tc)284 ATF_TC_HEAD(expf_nan, tc)
285 {
286 	atf_tc_set_md_var(tc, "descr", "Test expf(NaN) == NaN");
287 }
288 
ATF_TC_BODY(expf_nan,tc)289 ATF_TC_BODY(expf_nan, tc)
290 {
291 	const float x = 0.0L / 0.0L;
292 
293 	if (isnan(expf(x)) == 0)
294 		atf_tc_fail_nonfatal("expf(NaN) != NaN");
295 }
296 
297 ATF_TC(expf_inf_neg);
ATF_TC_HEAD(expf_inf_neg,tc)298 ATF_TC_HEAD(expf_inf_neg, tc)
299 {
300 	atf_tc_set_md_var(tc, "descr", "Test expf(-Inf) == +0.0");
301 }
302 
ATF_TC_BODY(expf_inf_neg,tc)303 ATF_TC_BODY(expf_inf_neg, tc)
304 {
305 	const float x = -1.0L / 0.0L;
306 	float y = expf(x);
307 
308 	if (fabsf(y) > 0.0 || signbit(y) != 0)
309 		atf_tc_fail_nonfatal("expf(-Inf) != +0.0");
310 }
311 
312 ATF_TC(expf_inf_pos);
ATF_TC_HEAD(expf_inf_pos,tc)313 ATF_TC_HEAD(expf_inf_pos, tc)
314 {
315 	atf_tc_set_md_var(tc, "descr", "Test expf(+Inf) == +Inf");
316 }
317 
ATF_TC_BODY(expf_inf_pos,tc)318 ATF_TC_BODY(expf_inf_pos, tc)
319 {
320 	const float x = 1.0L / 0.0L;
321 	float y = expf(x);
322 
323 	if (isinf(y) == 0 || signbit(y) != 0)
324 		atf_tc_fail_nonfatal("expf(+Inf) != +Inf");
325 }
326 
327 ATF_TC(expf_product);
ATF_TC_HEAD(expf_product,tc)328 ATF_TC_HEAD(expf_product, tc)
329 {
330 	atf_tc_set_md_var(tc, "descr", "Test some selected expf(x)");
331 }
332 
ATF_TC_BODY(expf_product,tc)333 ATF_TC_BODY(expf_product, tc)
334 {
335 	float eps;
336 	float x;
337 	float y;
338 	size_t i;
339 
340 	for (i = 0; i < __arraycount(exp_values); i++) {
341 		x = exp_values[i].x;
342 		y = exp_values[i].y;
343 		eps = 1e-6 * exp_values[i].e;
344 
345 		if (fabsf(expf(x) - y) > eps)
346 			atf_tc_fail_nonfatal("expf(%0.01f) != %18.18e", x, y);
347 	}
348 }
349 
350 ATF_TC(expf_zero_neg);
ATF_TC_HEAD(expf_zero_neg,tc)351 ATF_TC_HEAD(expf_zero_neg, tc)
352 {
353 	atf_tc_set_md_var(tc, "descr", "Test expf(-0.0) == 1.0");
354 }
355 
ATF_TC_BODY(expf_zero_neg,tc)356 ATF_TC_BODY(expf_zero_neg, tc)
357 {
358 	const float x = -0.0L;
359 
360 	if (fabsf(expf(x) - 1.0f) > 0.0)
361 		atf_tc_fail_nonfatal("expf(-0.0) != 1.0");
362 }
363 
364 ATF_TC(expf_zero_pos);
ATF_TC_HEAD(expf_zero_pos,tc)365 ATF_TC_HEAD(expf_zero_pos, tc)
366 {
367 	atf_tc_set_md_var(tc, "descr", "Test expf(+0.0) == 1.0");
368 }
369 
ATF_TC_BODY(expf_zero_pos,tc)370 ATF_TC_BODY(expf_zero_pos, tc)
371 {
372 	const float x = 0.0L;
373 
374 	if (fabsf(expf(x) - 1.0f) > 0.0)
375 		atf_tc_fail_nonfatal("expf(+0.0) != 1.0");
376 }
377 
378 /*
379  * expm1(3)
380  */
381 ATF_TC(expm1_nan);
ATF_TC_HEAD(expm1_nan,tc)382 ATF_TC_HEAD(expm1_nan, tc)
383 {
384 	atf_tc_set_md_var(tc, "descr", "Test expm1(NaN) == NaN");
385 }
386 
ATF_TC_BODY(expm1_nan,tc)387 ATF_TC_BODY(expm1_nan, tc)
388 {
389 	const double x = 0.0L / 0.0L;
390 
391 	if (isnan(expm1(x)) == 0)
392 		atf_tc_fail_nonfatal("expm1(NaN) != NaN");
393 }
394 
395 ATF_TC(expm1_inf_neg);
ATF_TC_HEAD(expm1_inf_neg,tc)396 ATF_TC_HEAD(expm1_inf_neg, tc)
397 {
398 	atf_tc_set_md_var(tc, "descr", "Test expm1(-Inf) == -1");
399 }
400 
ATF_TC_BODY(expm1_inf_neg,tc)401 ATF_TC_BODY(expm1_inf_neg, tc)
402 {
403 	const double x = -1.0L / 0.0L;
404 
405 	if (expm1(x) != -1.0)
406 		atf_tc_fail_nonfatal("expm1(-Inf) != -1.0");
407 }
408 
409 ATF_TC(expm1_inf_pos);
ATF_TC_HEAD(expm1_inf_pos,tc)410 ATF_TC_HEAD(expm1_inf_pos, tc)
411 {
412 	atf_tc_set_md_var(tc, "descr", "Test expm1(+Inf) == +Inf");
413 }
414 
ATF_TC_BODY(expm1_inf_pos,tc)415 ATF_TC_BODY(expm1_inf_pos, tc)
416 {
417 	const double x = 1.0L / 0.0L;
418 	double y = expm1(x);
419 
420 	if (isinf(y) == 0 || signbit(y) != 0)
421 		atf_tc_fail_nonfatal("expm1(+Inf) != +Inf");
422 }
423 
424 ATF_TC(expm1_zero_neg);
ATF_TC_HEAD(expm1_zero_neg,tc)425 ATF_TC_HEAD(expm1_zero_neg, tc)
426 {
427 	atf_tc_set_md_var(tc, "descr", "Test expm1(-0.0) == -0.0");
428 }
429 
ATF_TC_BODY(expm1_zero_neg,tc)430 ATF_TC_BODY(expm1_zero_neg, tc)
431 {
432 	const double x = -0.0L;
433 	double y = expm1(x);
434 
435 	if (fabs(y) > 0.0 || signbit(y) == 0)
436 		atf_tc_fail_nonfatal("expm1(-0.0) != -0.0");
437 }
438 
439 ATF_TC(expm1_zero_pos);
ATF_TC_HEAD(expm1_zero_pos,tc)440 ATF_TC_HEAD(expm1_zero_pos, tc)
441 {
442 	atf_tc_set_md_var(tc, "descr", "Test expm1(+0.0) == 1.0");
443 }
444 
ATF_TC_BODY(expm1_zero_pos,tc)445 ATF_TC_BODY(expm1_zero_pos, tc)
446 {
447 	const double x = 0.0L;
448 	double y = expm1(x);
449 
450 	if (fabs(y) > 0.0 || signbit(y) != 0)
451 		atf_tc_fail_nonfatal("expm1(+0.0) != +0.0");
452 }
453 
454 /*
455  * expm1f(3)
456  */
457 ATF_TC(expm1f_nan);
ATF_TC_HEAD(expm1f_nan,tc)458 ATF_TC_HEAD(expm1f_nan, tc)
459 {
460 	atf_tc_set_md_var(tc, "descr", "Test expm1f(NaN) == NaN");
461 }
462 
ATF_TC_BODY(expm1f_nan,tc)463 ATF_TC_BODY(expm1f_nan, tc)
464 {
465 	const float x = 0.0L / 0.0L;
466 
467 	if (isnan(expm1f(x)) == 0)
468 		atf_tc_fail_nonfatal("expm1f(NaN) != NaN");
469 }
470 
471 ATF_TC(expm1f_inf_neg);
ATF_TC_HEAD(expm1f_inf_neg,tc)472 ATF_TC_HEAD(expm1f_inf_neg, tc)
473 {
474 	atf_tc_set_md_var(tc, "descr", "Test expm1f(-Inf) == -1");
475 }
476 
ATF_TC_BODY(expm1f_inf_neg,tc)477 ATF_TC_BODY(expm1f_inf_neg, tc)
478 {
479 	const float x = -1.0L / 0.0L;
480 
481 	if (expm1f(x) != -1.0)
482 		atf_tc_fail_nonfatal("expm1f(-Inf) != -1.0");
483 }
484 
485 ATF_TC(expm1f_inf_pos);
ATF_TC_HEAD(expm1f_inf_pos,tc)486 ATF_TC_HEAD(expm1f_inf_pos, tc)
487 {
488 	atf_tc_set_md_var(tc, "descr", "Test expm1f(+Inf) == +Inf");
489 }
490 
ATF_TC_BODY(expm1f_inf_pos,tc)491 ATF_TC_BODY(expm1f_inf_pos, tc)
492 {
493 	const float x = 1.0L / 0.0L;
494 	float y = expm1f(x);
495 
496 	if (isinf(y) == 0 || signbit(y) != 0)
497 		atf_tc_fail_nonfatal("expm1f(+Inf) != +Inf");
498 }
499 
500 ATF_TC(expm1f_zero_neg);
ATF_TC_HEAD(expm1f_zero_neg,tc)501 ATF_TC_HEAD(expm1f_zero_neg, tc)
502 {
503 	atf_tc_set_md_var(tc, "descr", "Test expm1f(-0.0) == -0.0");
504 }
505 
ATF_TC_BODY(expm1f_zero_neg,tc)506 ATF_TC_BODY(expm1f_zero_neg, tc)
507 {
508 	const float x = -0.0L;
509 	float y = expm1f(x);
510 
511 	if (fabsf(y) > 0.0 || signbit(y) == 0)
512 		atf_tc_fail_nonfatal("expm1f(-0.0) != -0.0");
513 }
514 
515 ATF_TC(expm1f_zero_pos);
ATF_TC_HEAD(expm1f_zero_pos,tc)516 ATF_TC_HEAD(expm1f_zero_pos, tc)
517 {
518 	atf_tc_set_md_var(tc, "descr", "Test expm1f(+0.0) == 1.0");
519 }
520 
ATF_TC_BODY(expm1f_zero_pos,tc)521 ATF_TC_BODY(expm1f_zero_pos, tc)
522 {
523 	const float x = 0.0L;
524 	float y = expm1f(x);
525 
526 	if (fabsf(y) > 0.0 || signbit(y) != 0)
527 		atf_tc_fail_nonfatal("expm1f(+0.0) != +0.0");
528 }
529 
ATF_TP_ADD_TCS(tp)530 ATF_TP_ADD_TCS(tp)
531 {
532 
533 	ATF_TP_ADD_TC(tp, exp2_is_nan);
534 	ATF_TP_ADD_TC(tp, exp2_is_plus_zero);
535 	ATF_TP_ADD_TC(tp, exp2_values);
536 	ATF_TP_ADD_TC(tp, exp2_powers);
537 
538 	ATF_TP_ADD_TC(tp, exp_nan);
539 	ATF_TP_ADD_TC(tp, exp_inf_neg);
540 	ATF_TP_ADD_TC(tp, exp_inf_pos);
541 	ATF_TP_ADD_TC(tp, exp_product);
542 	ATF_TP_ADD_TC(tp, exp_zero_neg);
543 	ATF_TP_ADD_TC(tp, exp_zero_pos);
544 
545 	ATF_TP_ADD_TC(tp, expf_nan);
546 	ATF_TP_ADD_TC(tp, expf_inf_neg);
547 	ATF_TP_ADD_TC(tp, expf_inf_pos);
548 	ATF_TP_ADD_TC(tp, expf_product);
549 	ATF_TP_ADD_TC(tp, expf_zero_neg);
550 	ATF_TP_ADD_TC(tp, expf_zero_pos);
551 
552 	ATF_TP_ADD_TC(tp, expm1_nan);
553 	ATF_TP_ADD_TC(tp, expm1_inf_neg);
554 	ATF_TP_ADD_TC(tp, expm1_inf_pos);
555 	ATF_TP_ADD_TC(tp, expm1_zero_neg);
556 	ATF_TP_ADD_TC(tp, expm1_zero_pos);
557 
558 	ATF_TP_ADD_TC(tp, expm1f_nan);
559 	ATF_TP_ADD_TC(tp, expm1f_inf_neg);
560 	ATF_TP_ADD_TC(tp, expm1f_inf_pos);
561 	ATF_TP_ADD_TC(tp, expm1f_zero_neg);
562 	ATF_TP_ADD_TC(tp, expm1f_zero_pos);
563 
564 	return atf_no_error();
565 }
566