1 /* $NetBSD: t_cbrt.c,v 1.6 2024/04/03 01:52:28 christos 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_cbrt.c,v 1.6 2024/04/03 01:52:28 christos Exp $"); 33 34 #include <atf-c.h> 35 #include <float.h> 36 #include <math.h> 37 #include <stdio.h> 38 39 /* 40 * cbrt(3) 41 */ 42 ATF_TC(cbrt_nan); 43 ATF_TC_HEAD(cbrt_nan, tc) 44 { 45 atf_tc_set_md_var(tc, "descr", "Test cbrt(NaN) == NaN"); 46 } 47 48 ATF_TC_BODY(cbrt_nan, tc) 49 { 50 const double x = 0.0L / 0.0L; 51 52 ATF_CHECK(isnan(x) != 0); 53 ATF_CHECK(isnan(cbrt(x)) != 0); 54 } 55 56 ATF_TC(cbrt_pow); 57 ATF_TC_HEAD(cbrt_pow, tc) 58 { 59 atf_tc_set_md_var(tc, "descr", "Test cbrt(3) vs. pow(3)"); 60 } 61 62 ATF_TC_BODY(cbrt_pow, tc) 63 { 64 const double x[] = { 0.0, 0.005, 1.0, 99.0, 123.123, 9999.0 }; 65 /* Neither cbrt nor pow is required to be correctly rounded. */ 66 const double eps = 2*DBL_EPSILON; 67 size_t i; 68 69 for (i = 0; i < __arraycount(x); i++) { 70 double x_cbrt = cbrt(x[i]); 71 double x_pow13 = pow(x[i], 1.0 / 3.0); 72 bool ok; 73 74 if (x[i] == 0) { 75 ok = (x_cbrt == x_pow13); 76 } else { 77 ok = (fabs((x_cbrt - x_pow13)/x_cbrt) <= eps); 78 } 79 80 if (!ok) { 81 atf_tc_fail_nonfatal("cbrt(%.17g) = %.17g != " 82 "pow(%.17g, 1/3) = %.17g\n", 83 x[i], x_cbrt, x[i], x_pow13); 84 } 85 } 86 } 87 88 ATF_TC(cbrt_inf_neg); 89 ATF_TC_HEAD(cbrt_inf_neg, tc) 90 { 91 atf_tc_set_md_var(tc, "descr", "Test cbrt(-Inf) == -Inf"); 92 } 93 94 ATF_TC_BODY(cbrt_inf_neg, tc) 95 { 96 const double x = -1.0L / 0.0L; 97 double y = cbrt(x); 98 99 ATF_CHECK(isinf(y) != 0); 100 ATF_CHECK(signbit(y) != 0); 101 } 102 103 ATF_TC(cbrt_inf_pos); 104 ATF_TC_HEAD(cbrt_inf_pos, tc) 105 { 106 atf_tc_set_md_var(tc, "descr", "Test cbrt(+Inf) == +Inf"); 107 } 108 109 ATF_TC_BODY(cbrt_inf_pos, tc) 110 { 111 const double x = 1.0L / 0.0L; 112 double y = cbrt(x); 113 114 ATF_CHECK(isinf(y) != 0); 115 ATF_CHECK(signbit(y) == 0); 116 } 117 118 ATF_TC(cbrt_zero_neg); 119 ATF_TC_HEAD(cbrt_zero_neg, tc) 120 { 121 atf_tc_set_md_var(tc, "descr", "Test cbrt(-0.0) == -0.0"); 122 } 123 124 ATF_TC_BODY(cbrt_zero_neg, tc) 125 { 126 const double x = -0.0L; 127 double y = cbrt(x); 128 129 if (fabs(y) > 0.0 || signbit(y) == 0) 130 atf_tc_fail_nonfatal("cbrt(-0.0) != -0.0"); 131 } 132 133 ATF_TC(cbrt_zero_pos); 134 ATF_TC_HEAD(cbrt_zero_pos, tc) 135 { 136 atf_tc_set_md_var(tc, "descr", "Test cbrt(+0.0) == +0.0"); 137 } 138 139 ATF_TC_BODY(cbrt_zero_pos, tc) 140 { 141 const double x = 0.0L; 142 double y = cbrt(x); 143 144 if (fabs(y) > 0.0 || signbit(y) != 0) 145 atf_tc_fail_nonfatal("cbrt(+0.0) != +0.0"); 146 } 147 148 /* 149 * cbrtf(3) 150 */ 151 ATF_TC(cbrtf_nan); 152 ATF_TC_HEAD(cbrtf_nan, tc) 153 { 154 atf_tc_set_md_var(tc, "descr", "Test cbrtf(NaN) == NaN"); 155 } 156 157 ATF_TC_BODY(cbrtf_nan, tc) 158 { 159 const float x = 0.0L / 0.0L; 160 161 ATF_CHECK(isnan(x) != 0); 162 ATF_CHECK(isnan(cbrtf(x)) != 0); 163 } 164 165 ATF_TC(cbrtf_powf); 166 ATF_TC_HEAD(cbrtf_powf, tc) 167 { 168 atf_tc_set_md_var(tc, "descr", "Test cbrtf(3) vs. powf(3)"); 169 } 170 171 ATF_TC_BODY(cbrtf_powf, tc) 172 { 173 const float x[] = { 0.0, 0.005, 1.0, 99.0, 123.123, 9999.0 }; 174 /* Neither cbrt nor pow is required to be correctly rounded. */ 175 const float eps = 2*FLT_EPSILON; 176 size_t i; 177 178 for (i = 0; i < __arraycount(x); i++) { 179 float x_cbrt = cbrtf(x[i]); 180 float x_pow13 = powf(x[i], 1.0 / 3.0); 181 bool ok; 182 183 if (x[i] == 0) { 184 ok = (x_cbrt == x_pow13); 185 } else { 186 ok = (fabsf((x_cbrt - x_pow13)/x_cbrt) <= eps); 187 } 188 189 if (!ok) { 190 atf_tc_fail_nonfatal("cbrtf(%.9g) = %.9g. != " 191 "powf(%.9g, 1/3) = %.9g\n", 192 (double)x[i], (double)x_cbrt, 193 (double)x[i], (double)x_pow13); 194 } 195 } 196 } 197 198 ATF_TC(cbrtf_inf_neg); 199 ATF_TC_HEAD(cbrtf_inf_neg, tc) 200 { 201 atf_tc_set_md_var(tc, "descr", "Test cbrtf(-Inf) == -Inf"); 202 } 203 204 ATF_TC_BODY(cbrtf_inf_neg, tc) 205 { 206 const float x = -1.0L / 0.0L; 207 float y = cbrtf(x); 208 209 ATF_CHECK(isinf(y) != 0); 210 ATF_CHECK(signbit(y) != 0); 211 } 212 213 ATF_TC(cbrtf_inf_pos); 214 ATF_TC_HEAD(cbrtf_inf_pos, tc) 215 { 216 atf_tc_set_md_var(tc, "descr", "Test cbrtf(+Inf) == +Inf"); 217 } 218 219 ATF_TC_BODY(cbrtf_inf_pos, tc) 220 { 221 const float x = 1.0L / 0.0L; 222 float y = cbrtf(x); 223 224 ATF_CHECK(isinf(y) != 0); 225 ATF_CHECK(signbit(y) == 0); 226 } 227 228 ATF_TC(cbrtf_zero_neg); 229 ATF_TC_HEAD(cbrtf_zero_neg, tc) 230 { 231 atf_tc_set_md_var(tc, "descr", "Test cbrtf(-0.0) == -0.0"); 232 } 233 234 ATF_TC_BODY(cbrtf_zero_neg, tc) 235 { 236 const float x = -0.0L; 237 float y = cbrtf(x); 238 239 if (fabsf(y) > 0.0 || signbit(y) == 0) 240 atf_tc_fail_nonfatal("cbrtf(-0.0) != -0.0"); 241 } 242 243 ATF_TC(cbrtf_zero_pos); 244 ATF_TC_HEAD(cbrtf_zero_pos, tc) 245 { 246 atf_tc_set_md_var(tc, "descr", "Test cbrtf(+0.0) == +0.0"); 247 } 248 249 ATF_TC_BODY(cbrtf_zero_pos, tc) 250 { 251 const float x = 0.0L; 252 float y = cbrtf(x); 253 254 if (fabsf(y) > 0.0 || signbit(y) != 0) 255 atf_tc_fail_nonfatal("cbrtf(+0.0) != +0.0"); 256 } 257 258 /* 259 * cbrtl(3) 260 */ 261 ATF_TC(cbrtl_nan); 262 ATF_TC_HEAD(cbrtl_nan, tc) 263 { 264 atf_tc_set_md_var(tc, "descr", "Test cbrtl(NaN) == NaN"); 265 } 266 267 ATF_TC_BODY(cbrtl_nan, tc) 268 { 269 const long double x = 0.0L / 0.0L; 270 271 ATF_CHECK(isnan(x) != 0); 272 ATF_CHECK(isnan(cbrtl(x)) != 0); 273 } 274 275 ATF_TC(cbrtl_powl); 276 ATF_TC_HEAD(cbrtl_powl, tc) 277 { 278 atf_tc_set_md_var(tc, "descr", "Test cbrtl(3) vs. powl(3)"); 279 } 280 281 ATF_TC_BODY(cbrtl_powl, tc) 282 { 283 const long double x[] = { 0.0, 0.005, 1.0, 99.0, 123.123, 9999.0 }; 284 /* Neither cbrt nor pow is required to be correctly rounded. */ 285 const long double eps = 2*LDBL_EPSILON; 286 size_t i; 287 288 for (i = 0; i < __arraycount(x); i++) { 289 long double x_cbrt = cbrtl(x[i]); 290 long double x_pow13 = powl(x[i], 1.0L / 3.0L); 291 bool ok; 292 293 if (x[i] == 0) { 294 ok = (x_cbrt == x_pow13); 295 } else { 296 ok = (fabsl((x_cbrt - x_pow13)/x_cbrt) <= eps); 297 } 298 299 if (!ok) { 300 atf_tc_fail_nonfatal("cbrtl(%.35Lg) = %.35Lg != " 301 "powl(%.35Lg, 1/3) = %.35Lg\n", 302 x[i], x_cbrt, x[i], x_pow13); 303 } 304 } 305 } 306 307 ATF_TC(cbrtl_inf_neg); 308 ATF_TC_HEAD(cbrtl_inf_neg, tc) 309 { 310 atf_tc_set_md_var(tc, "descr", "Test cbrtl(-Inf) == -Inf"); 311 } 312 313 ATF_TC_BODY(cbrtl_inf_neg, tc) 314 { 315 const long double x = -1.0L / 0.0L; 316 long double y = cbrtl(x); 317 318 ATF_CHECK(isinf(y) != 0); 319 ATF_CHECK(signbit(y) != 0); 320 } 321 322 ATF_TC(cbrtl_inf_pos); 323 ATF_TC_HEAD(cbrtl_inf_pos, tc) 324 { 325 atf_tc_set_md_var(tc, "descr", "Test cbrtl(+Inf) == +Inf"); 326 } 327 328 ATF_TC_BODY(cbrtl_inf_pos, tc) 329 { 330 const long double x = 1.0L / 0.0L; 331 long double y = cbrtl(x); 332 333 ATF_CHECK(isinf(y) != 0); 334 ATF_CHECK(signbit(y) == 0); 335 } 336 337 ATF_TC(cbrtl_zero_neg); 338 ATF_TC_HEAD(cbrtl_zero_neg, tc) 339 { 340 atf_tc_set_md_var(tc, "descr", "Test cbrtl(-0.0) == -0.0"); 341 } 342 343 ATF_TC_BODY(cbrtl_zero_neg, tc) 344 { 345 const long double x = -0.0L; 346 long double y = cbrtl(x); 347 348 if (fabsl(y) > 0.0 || signbit(y) == 0) 349 atf_tc_fail_nonfatal("cbrtl(-0.0) != -0.0"); 350 } 351 352 ATF_TC(cbrtl_zero_pos); 353 ATF_TC_HEAD(cbrtl_zero_pos, tc) 354 { 355 atf_tc_set_md_var(tc, "descr", "Test cbrtl(+0.0) == +0.0"); 356 } 357 358 ATF_TC_BODY(cbrtl_zero_pos, tc) 359 { 360 const long double x = 0.0L; 361 long double y = cbrtl(x); 362 363 if (fabsl(y) > 0.0 || signbit(y) != 0) 364 atf_tc_fail_nonfatal("cbrtl(+0.0) != +0.0"); 365 } 366 367 ATF_TP_ADD_TCS(tp) 368 { 369 370 ATF_TP_ADD_TC(tp, cbrt_nan); 371 ATF_TP_ADD_TC(tp, cbrt_pow); 372 ATF_TP_ADD_TC(tp, cbrt_inf_neg); 373 ATF_TP_ADD_TC(tp, cbrt_inf_pos); 374 ATF_TP_ADD_TC(tp, cbrt_zero_neg); 375 ATF_TP_ADD_TC(tp, cbrt_zero_pos); 376 377 ATF_TP_ADD_TC(tp, cbrtf_nan); 378 ATF_TP_ADD_TC(tp, cbrtf_powf); 379 ATF_TP_ADD_TC(tp, cbrtf_inf_neg); 380 ATF_TP_ADD_TC(tp, cbrtf_inf_pos); 381 ATF_TP_ADD_TC(tp, cbrtf_zero_neg); 382 ATF_TP_ADD_TC(tp, cbrtf_zero_pos); 383 384 ATF_TP_ADD_TC(tp, cbrtl_nan); 385 ATF_TP_ADD_TC(tp, cbrtl_powl); 386 ATF_TP_ADD_TC(tp, cbrtl_inf_neg); 387 ATF_TP_ADD_TC(tp, cbrtl_inf_pos); 388 ATF_TP_ADD_TC(tp, cbrtl_zero_neg); 389 ATF_TP_ADD_TC(tp, cbrtl_zero_pos); 390 391 return atf_no_error(); 392 } 393
Indexes created Tue Sep 30 17:09:57 GMT 2025