1/* $NetBSD: t_sqrt.c,v 1.7 2014/03/12 21:40:07 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#include <sys/cdefs.h> 32__RCSID("$NetBSD: t_sqrt.c,v 1.7 2014/03/12 21:40:07 martin 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#if __DBL_MIN_10_EXP__ <= -40 66 const double eps = 1.0e-40; 67#else 68 const double eps = __DBL_MIN__*4.0; 69#endif 70 double y, z; 71 size_t i; 72 73 for (i = 0; i < __arraycount(x); i++) { 74 75 y = sqrt(x[i]); 76 z = pow(x[i], 1.0 / 2.0); 77 78 if (fabs(y - z) > eps) 79 atf_tc_fail_nonfatal("sqrt(%0.03f) != " 80 "pow(%0.03f, 1/2)\n", x[i], x[i]); 81 } 82} 83 84ATF_TC(sqrt_inf_neg); 85ATF_TC_HEAD(sqrt_inf_neg, tc) 86{ 87 atf_tc_set_md_var(tc, "descr", "Test sqrt(-Inf) == NaN"); 88} 89 90ATF_TC_BODY(sqrt_inf_neg, tc) 91{ 92 const double x = -1.0L / 0.0L; 93 double y = sqrt(x); 94 95 ATF_CHECK(isnan(y) != 0); 96} 97 98ATF_TC(sqrt_inf_pos); 99ATF_TC_HEAD(sqrt_inf_pos, tc) 100{ 101 atf_tc_set_md_var(tc, "descr", "Test sqrt(+Inf) == +Inf"); 102} 103 104ATF_TC_BODY(sqrt_inf_pos, tc) 105{ 106 const double x = 1.0L / 0.0L; 107 double y = sqrt(x); 108 109 ATF_CHECK(isinf(y) != 0); 110 ATF_CHECK(signbit(y) == 0); 111} 112 113ATF_TC(sqrt_zero_neg); 114ATF_TC_HEAD(sqrt_zero_neg, tc) 115{ 116 atf_tc_set_md_var(tc, "descr", "Test sqrt(-0.0) == -0.0"); 117} 118 119ATF_TC_BODY(sqrt_zero_neg, tc) 120{ 121 const double x = -0.0L; 122 double y = sqrt(x); 123 124 if (fabs(y) > 0.0 || signbit(y) == 0) 125 atf_tc_fail_nonfatal("sqrt(-0.0) != -0.0"); 126} 127 128ATF_TC(sqrt_zero_pos); 129ATF_TC_HEAD(sqrt_zero_pos, tc) 130{ 131 atf_tc_set_md_var(tc, "descr", "Test sqrt(+0.0) == +0.0"); 132} 133 134ATF_TC_BODY(sqrt_zero_pos, tc) 135{ 136 const double x = 0.0L; 137 double y = sqrt(x); 138 139 if (fabs(y) > 0.0 || signbit(y) != 0) 140 atf_tc_fail_nonfatal("sqrt(+0.0) != +0.0"); 141} 142 143/* 144 * sqrtf(3) 145 */ 146ATF_TC(sqrtf_nan); 147ATF_TC_HEAD(sqrtf_nan, tc) 148{ 149 atf_tc_set_md_var(tc, "descr", "Test sqrtf(NaN) == NaN"); 150} 151 152ATF_TC_BODY(sqrtf_nan, tc) 153{ 154 const float x = 0.0L / 0.0L; 155 156 ATF_CHECK(isnan(x) != 0); 157 ATF_CHECK(isnan(sqrtf(x)) != 0); 158} 159 160ATF_TC(sqrtf_powf); 161ATF_TC_HEAD(sqrtf_powf, tc) 162{ 163 atf_tc_set_md_var(tc, "descr", "Test sqrtf(3) vs. powf(3)"); 164} 165 166ATF_TC_BODY(sqrtf_powf, tc) 167{ 168 const float x[] = { 0.0, 0.005, 1.0, 99.0, 123.123, 9999.9999 }; 169 const float eps = 1.0e-30; 170 volatile float y, z; 171 size_t i; 172 173 for (i = 0; i < __arraycount(x); i++) { 174 175 y = sqrtf(x[i]); 176 z = powf(x[i], 1.0 / 2.0); 177 178 if (fabsf(y - z) > eps) 179 atf_tc_fail_nonfatal("sqrtf(%0.03f) != " 180 "powf(%0.03f, 1/2)\n", x[i], x[i]); 181 } 182} 183 184ATF_TC(sqrtf_inf_neg); 185ATF_TC_HEAD(sqrtf_inf_neg, tc) 186{ 187 atf_tc_set_md_var(tc, "descr", "Test sqrtf(-Inf) == NaN"); 188} 189 190ATF_TC_BODY(sqrtf_inf_neg, tc) 191{ 192 const float x = -1.0L / 0.0L; 193 float y = sqrtf(x); 194 195 ATF_CHECK(isnan(y) != 0); 196} 197 198ATF_TC(sqrtf_inf_pos); 199ATF_TC_HEAD(sqrtf_inf_pos, tc) 200{ 201 atf_tc_set_md_var(tc, "descr", "Test sqrtf(+Inf) == +Inf"); 202} 203 204ATF_TC_BODY(sqrtf_inf_pos, tc) 205{ 206 const float x = 1.0L / 0.0L; 207 float y = sqrtf(x); 208 209 ATF_CHECK(isinf(y) != 0); 210 ATF_CHECK(signbit(y) == 0); 211} 212 213ATF_TC(sqrtf_zero_neg); 214ATF_TC_HEAD(sqrtf_zero_neg, tc) 215{ 216 atf_tc_set_md_var(tc, "descr", "Test sqrtf(-0.0) == -0.0"); 217} 218 219ATF_TC_BODY(sqrtf_zero_neg, tc) 220{ 221 const float x = -0.0L; 222 float y = sqrtf(x); 223 224 if (fabsf(y) > 0.0 || signbit(y) == 0) 225 atf_tc_fail_nonfatal("sqrtf(-0.0) != -0.0"); 226} 227 228ATF_TC(sqrtf_zero_pos); 229ATF_TC_HEAD(sqrtf_zero_pos, tc) 230{ 231 atf_tc_set_md_var(tc, "descr", "Test sqrtf(+0.0) == +0.0"); 232} 233 234ATF_TC_BODY(sqrtf_zero_pos, tc) 235{ 236 const float x = 0.0L; 237 float y = sqrtf(x); 238 239 if (fabsf(y) > 0.0 || signbit(y) != 0) 240 atf_tc_fail_nonfatal("sqrtf(+0.0) != +0.0"); 241} 242 243/* 244 * sqrtl(3) 245 */ 246ATF_TC(sqrtl_nan); 247ATF_TC_HEAD(sqrtl_nan, tc) 248{ 249 atf_tc_set_md_var(tc, "descr", "Test sqrtl(NaN) == NaN"); 250} 251 252ATF_TC_BODY(sqrtl_nan, tc) 253{ 254 const long double x = 0.0L / 0.0L; 255 256 ATF_CHECK(isnan(x) != 0); 257 ATF_CHECK(isnan(sqrtl(x)) != 0); 258} 259 260ATF_TC(sqrtl_powl); 261ATF_TC_HEAD(sqrtl_powl, tc) 262{ 263 atf_tc_set_md_var(tc, "descr", "Test sqrtl(3) vs. powl(3)"); 264} 265 266ATF_TC_BODY(sqrtl_powl, tc) 267{ 268 const long double x[] = { 0.0, 0.005, 1.0, 99.0, 123.123, 9999.9999 }; 269 const long double eps = 5.0*DBL_EPSILON; /* XXX powl == pow for now */ 270 volatile long double y, z; 271 size_t i; 272 273 for (i = 0; i < __arraycount(x); i++) { 274 275 y = sqrtl(x[i]); 276 z = powl(x[i], 1.0 / 2.0); 277 278 if (fabsl(y - z) > eps) 279 atf_tc_fail_nonfatal("sqrtl(%0.03Lf) != " 280 "powl(%0.03Lf, 1/2)\n", x[i], x[i]); 281 } 282} 283 284ATF_TC(sqrtl_inf_neg); 285ATF_TC_HEAD(sqrtl_inf_neg, tc) 286{ 287 atf_tc_set_md_var(tc, "descr", "Test sqrtl(-Inf) == NaN"); 288} 289 290ATF_TC_BODY(sqrtl_inf_neg, tc) 291{ 292 const long double x = -1.0L / 0.0L; 293 long double y = sqrtl(x); 294 295 ATF_CHECK(isnan(y) != 0); 296} 297 298ATF_TC(sqrtl_inf_pos); 299ATF_TC_HEAD(sqrtl_inf_pos, tc) 300{ 301 atf_tc_set_md_var(tc, "descr", "Test sqrtl(+Inf) == +Inf"); 302} 303 304ATF_TC_BODY(sqrtl_inf_pos, tc) 305{ 306 const long double x = 1.0L / 0.0L; 307 long double y = sqrtl(x); 308 309 ATF_CHECK(isinf(y) != 0); 310 ATF_CHECK(signbit(y) == 0); 311} 312 313ATF_TC(sqrtl_zero_neg); 314ATF_TC_HEAD(sqrtl_zero_neg, tc) 315{ 316 atf_tc_set_md_var(tc, "descr", "Test sqrtl(-0.0) == -0.0"); 317} 318 319ATF_TC_BODY(sqrtl_zero_neg, tc) 320{ 321 const long double x = -0.0L; 322 long double y = sqrtl(x); 323 324 if (fabsl(y) > 0.0 || signbit(y) == 0) 325 atf_tc_fail_nonfatal("sqrtl(-0.0) != -0.0"); 326} 327 328ATF_TC(sqrtl_zero_pos); 329ATF_TC_HEAD(sqrtl_zero_pos, tc) 330{ 331 atf_tc_set_md_var(tc, "descr", "Test sqrtl(+0.0) == +0.0"); 332} 333 334ATF_TC_BODY(sqrtl_zero_pos, tc) 335{ 336 const long double x = 0.0L; 337 long double y = sqrtl(x); 338 339 if (fabsl(y) > 0.0 || signbit(y) != 0) 340 atf_tc_fail_nonfatal("sqrtl(+0.0) != +0.0"); 341} 342 343ATF_TP_ADD_TCS(tp) 344{ 345 346 ATF_TP_ADD_TC(tp, sqrt_nan); 347 ATF_TP_ADD_TC(tp, sqrt_pow); 348 ATF_TP_ADD_TC(tp, sqrt_inf_neg); 349 ATF_TP_ADD_TC(tp, sqrt_inf_pos); 350 ATF_TP_ADD_TC(tp, sqrt_zero_neg); 351 ATF_TP_ADD_TC(tp, sqrt_zero_pos); 352 353 ATF_TP_ADD_TC(tp, sqrtf_nan); 354 ATF_TP_ADD_TC(tp, sqrtf_powf); 355 ATF_TP_ADD_TC(tp, sqrtf_inf_neg); 356 ATF_TP_ADD_TC(tp, sqrtf_inf_pos); 357 ATF_TP_ADD_TC(tp, sqrtf_zero_neg); 358 ATF_TP_ADD_TC(tp, sqrtf_zero_pos); 359 360 ATF_TP_ADD_TC(tp, sqrtl_nan); 361 ATF_TP_ADD_TC(tp, sqrtl_powl); 362 ATF_TP_ADD_TC(tp, sqrtl_inf_neg); 363 ATF_TP_ADD_TC(tp, sqrtl_inf_pos); 364 ATF_TP_ADD_TC(tp, sqrtl_zero_neg); 365 ATF_TP_ADD_TC(tp, sqrtl_zero_pos); 366 367 return atf_no_error(); 368} 369