1/* Test file for mpfr_set_si and mpfr_set_ui. 2 3Copyright 1999, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. 4Contributed by the Arenaire and Cacao projects, INRIA. 5 6This file is part of the GNU MPFR Library. 7 8The GNU MPFR Library is free software; you can redistribute it and/or modify 9it under the terms of the GNU Lesser General Public License as published by 10the Free Software Foundation; either version 3 of the License, or (at your 11option) any later version. 12 13The GNU MPFR Library is distributed in the hope that it will be useful, but 14WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 15or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 16License for more details. 17 18You should have received a copy of the GNU Lesser General Public License 19along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see 20http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc., 2151 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */ 22 23#include <stdio.h> 24#include <stdlib.h> 25#include <limits.h> 26 27#include "mpfr-test.h" 28 29#define ERROR(str) {printf("Error for "str"\n"); exit(1);} 30 31static void 32test_2exp (void) 33{ 34 mpfr_t x; 35 int res; 36 37 mpfr_init2 (x, 32); 38 39 mpfr_set_ui_2exp (x, 1, 0, MPFR_RNDN); 40 if (mpfr_cmp_ui(x, 1)) 41 ERROR("(1U,0)"); 42 43 mpfr_set_ui_2exp (x, 1024, -10, MPFR_RNDN); 44 if (mpfr_cmp_ui(x, 1)) 45 ERROR("(1024U,-10)"); 46 47 mpfr_set_ui_2exp (x, 1024, 10, MPFR_RNDN); 48 if (mpfr_cmp_ui(x, 1024*1024)) 49 ERROR("(1024U,+10)"); 50 51 mpfr_set_si_2exp (x, -1024L * 1024L, -10, MPFR_RNDN); 52 if (mpfr_cmp_si(x, -1024)) 53 ERROR("(1M,-10)"); 54 55 mpfr_set_ui_2exp (x, 0x92345678, 16, MPFR_RNDN); 56 if (mpfr_cmp_str (x, "92345678@4", 16, MPFR_RNDN)) 57 ERROR("(x92345678U,+16)"); 58 59 mpfr_set_si_2exp (x, -0x1ABCDEF0, -256, MPFR_RNDN); 60 if (mpfr_cmp_str (x, "-1ABCDEF0@-64", 16, MPFR_RNDN)) 61 ERROR("(-x1ABCDEF0,-256)"); 62 63 mpfr_set_prec (x, 2); 64 res = mpfr_set_si_2exp (x, 7, 10, MPFR_RNDU); 65 if (mpfr_cmp_ui (x, 1<<13) || res <= 0) 66 ERROR ("Prec 2 + si_2exp"); 67 68 res = mpfr_set_ui_2exp (x, 7, 10, MPFR_RNDU); 69 if (mpfr_cmp_ui (x, 1<<13) || res <= 0) 70 ERROR ("Prec 2 + ui_2exp"); 71 72 mpfr_clear_flags (); 73 mpfr_set_ui_2exp (x, 17, MPFR_EMAX_MAX, MPFR_RNDN); 74 if (!mpfr_inf_p (x) || MPFR_IS_NEG (x)) 75 ERROR ("mpfr_set_ui_2exp and overflow (bad result)"); 76 if (!mpfr_overflow_p ()) 77 ERROR ("mpfr_set_ui_2exp and overflow (overflow flag not set)"); 78 79 mpfr_clear_flags (); 80 mpfr_set_si_2exp (x, 17, MPFR_EMAX_MAX, MPFR_RNDN); 81 if (!mpfr_inf_p (x) || MPFR_IS_NEG (x)) 82 ERROR ("mpfr_set_si_2exp (pos) and overflow (bad result)"); 83 if (!mpfr_overflow_p ()) 84 ERROR ("mpfr_set_si_2exp (pos) and overflow (overflow flag not set)"); 85 86 mpfr_clear_flags (); 87 mpfr_set_si_2exp (x, -17, MPFR_EMAX_MAX, MPFR_RNDN); 88 if (!mpfr_inf_p (x) || MPFR_IS_POS (x)) 89 ERROR ("mpfr_set_si_2exp (neg) and overflow (bad result)"); 90 if (!mpfr_overflow_p ()) 91 ERROR ("mpfr_set_si_2exp (neg) and overflow (overflow flag not set)"); 92 93 mpfr_clear (x); 94} 95 96static void 97test_macros (void) 98{ 99 mpfr_t x[3]; 100 mpfr_ptr p; 101 int r; 102 103 mpfr_inits (x[0], x[1], x[2], (mpfr_ptr) 0); 104 p = x[0]; 105 r = 0; 106 mpfr_set_ui (p++, 0, (mpfr_rnd_t) r++); 107 if (p != x[1] || r != 1) 108 { 109 printf ("Error in mpfr_set_ui macro: p - x[0] = %d (expecting 1), " 110 "r = %d (expecting 1)\n", (int) (p - x[0]), r); 111 exit (1); 112 } 113 p = x[0]; 114 r = 0; 115 mpfr_set_si (p++, 0, (mpfr_rnd_t) r++); 116 if (p != x[1] || r != 1) 117 { 118 printf ("Error in mpfr_set_si macro: p - x[0] = %d (expecting 1), " 119 "r = %d (expecting 1)\n", (int) (p - x[0]), r); 120 exit (1); 121 } 122 mpfr_clears (x[0], x[1], x[2], (mpfr_ptr) 0); 123} 124 125/* FIXME: Comparing against mpfr_get_si/ui is not ideal, it'd be better to 126 have all tests examine the bits in mpfr_t for what should come out. */ 127 128int 129main (int argc, char *argv[]) 130{ 131 mpfr_t x; 132 long k, z, d, N; 133 unsigned long zl, dl; 134 int inex; 135 int r; 136 mpfr_exp_t emin, emax; 137 int flag; 138 139 tests_start_mpfr (); 140 141 mpfr_init2 (x, 100); 142 143 N = (argc==1) ? 100000 : atol (argv[1]); 144 145 for (k = 1; k <= N; k++) 146 { 147 z = (long) (randlimb () & LONG_MAX) + LONG_MIN / 2; 148 inex = mpfr_set_si (x, z, MPFR_RNDZ); 149 d = mpfr_get_si (x, MPFR_RNDZ); 150 if (d != z) 151 { 152 printf ("Error in mpfr_set_si: expected %ld got %ld\n", z, d); 153 exit (1); 154 } 155 if (inex) 156 { 157 printf ("Error in mpfr_set_si: inex value incorrect for %ld: %d\n", 158 z, inex); 159 exit (1); 160 } 161 } 162 163 for (k = 1; k <= N; k++) 164 { 165 zl = randlimb (); 166 inex = mpfr_set_ui (x, zl, MPFR_RNDZ); 167 dl = mpfr_get_ui (x, MPFR_RNDZ); 168 if (dl != zl) 169 { 170 printf ("Error in mpfr_set_ui: expected %lu got %lu\n", zl, dl); 171 exit (1); 172 } 173 if (inex) 174 { 175 printf ("Error in mpfr_set_ui: inex value incorrect for %lu: %d\n", 176 zl, inex); 177 exit (1); 178 } 179 } 180 181 mpfr_set_prec (x, 2); 182 if (mpfr_set_si (x, 5, MPFR_RNDZ) >= 0) 183 { 184 printf ("Wrong inexact flag for x=5, rnd=MPFR_RNDZ\n"); 185 exit (1); 186 } 187 188 mpfr_set_prec (x, 2); 189 if (mpfr_set_si (x, -5, MPFR_RNDZ) <= 0) 190 { 191 printf ("Wrong inexact flag for x=-5, rnd=MPFR_RNDZ\n"); 192 exit (1); 193 } 194 195 mpfr_set_prec (x, 3); 196 inex = mpfr_set_si (x, 77617, MPFR_RNDD); /* should be 65536 */ 197 if (MPFR_MANT(x)[0] != ((mp_limb_t)1 << (mp_bits_per_limb-1)) 198 || inex >= 0) 199 { 200 printf ("Error in mpfr_set_si(x:3, 77617, MPFR_RNDD)\n"); 201 mpfr_print_binary (x); 202 puts (""); 203 exit (1); 204 } 205 inex = mpfr_set_ui (x, 77617, MPFR_RNDD); /* should be 65536 */ 206 if (MPFR_MANT(x)[0] != ((mp_limb_t)1 << (mp_bits_per_limb-1)) 207 || inex >= 0) 208 { 209 printf ("Error in mpfr_set_ui(x:3, 77617, MPFR_RNDD)\n"); 210 mpfr_print_binary (x); 211 puts (""); 212 exit (1); 213 } 214 215 mpfr_set_prec (x, 2); 216 inex = mpfr_set_si (x, 33096, MPFR_RNDU); 217 if (mpfr_get_si (x, MPFR_RNDZ) != 49152 || inex <= 0) 218 { 219 printf ("Error in mpfr_set_si, exp. 49152, got %ld, inex %d\n", 220 mpfr_get_si (x, MPFR_RNDZ), inex); 221 exit (1); 222 } 223 inex = mpfr_set_ui (x, 33096, MPFR_RNDU); 224 if (mpfr_get_si (x, MPFR_RNDZ) != 49152) 225 { 226 printf ("Error in mpfr_set_ui, exp. 49152, got %ld, inex %d\n", 227 mpfr_get_si (x, MPFR_RNDZ), inex); 228 exit (1); 229 } 230 231 for (r = 0 ; r < MPFR_RND_MAX ; r++) 232 { 233 mpfr_set_si (x, -1, (mpfr_rnd_t) r); 234 mpfr_set_ui (x, 0, (mpfr_rnd_t) r); 235 if (MPFR_IS_NEG (x) || mpfr_get_ui (x, (mpfr_rnd_t) r) != 0) 236 { 237 printf ("mpfr_set_ui (x, 0) gives -0 for %s\n", 238 mpfr_print_rnd_mode ((mpfr_rnd_t) r)); 239 exit (1); 240 } 241 242 mpfr_set_si (x, -1, (mpfr_rnd_t) r); 243 mpfr_set_si (x, 0, (mpfr_rnd_t) r); 244 if (MPFR_IS_NEG (x) || mpfr_get_si (x, (mpfr_rnd_t) r) != 0) 245 { 246 printf ("mpfr_set_si (x, 0) gives -0 for %s\n", 247 mpfr_print_rnd_mode ((mpfr_rnd_t) r)); 248 exit (1); 249 } 250 } 251 252 /* check potential bug in case mp_limb_t is unsigned */ 253 emax = mpfr_get_emax (); 254 set_emax (0); 255 mpfr_set_si (x, -1, MPFR_RNDN); 256 if (mpfr_sgn (x) >= 0) 257 { 258 printf ("mpfr_set_si (x, -1) fails\n"); 259 exit (1); 260 } 261 set_emax (emax); 262 263 emax = mpfr_get_emax (); 264 set_emax (5); 265 mpfr_set_prec (x, 2); 266 mpfr_set_si (x, -31, MPFR_RNDN); 267 if (mpfr_sgn (x) >= 0) 268 { 269 printf ("mpfr_set_si (x, -31) fails\n"); 270 exit (1); 271 } 272 set_emax (emax); 273 274 /* test for get_ui */ 275 mpfr_set_ui (x, 0, MPFR_RNDN); 276 MPFR_ASSERTN(mpfr_get_ui (x, MPFR_RNDN) == 0); 277 mpfr_set_ui (x, ULONG_MAX, MPFR_RNDU); 278 mpfr_nextabove (x); 279 mpfr_get_ui (x, MPFR_RNDU); 280 281 /* another test for get_ui */ 282 mpfr_set_prec (x, 10); 283 mpfr_set_str_binary (x, "10.101"); 284 dl = mpfr_get_ui (x, MPFR_RNDN); 285 MPFR_ASSERTN (dl == 3); 286 287 mpfr_set_str_binary (x, "-1.0"); 288 mpfr_get_ui (x, MPFR_RNDN); 289 290 mpfr_set_str_binary (x, "0.1"); 291 dl = mpfr_get_ui (x, MPFR_RNDN); 292 MPFR_ASSERTN (dl == 0); 293 dl = mpfr_get_ui (x, MPFR_RNDZ); 294 MPFR_ASSERTN (dl == 0); 295 dl = mpfr_get_ui (x, MPFR_RNDD); 296 MPFR_ASSERTN (dl == 0); 297 dl = mpfr_get_ui (x, MPFR_RNDU); 298 MPFR_ASSERTN (dl == 1); 299 300 /* coverage tests */ 301 mpfr_set_prec (x, 2); 302 mpfr_set_si (x, -7, MPFR_RNDD); 303 MPFR_ASSERTN(mpfr_cmp_si (x, -8) == 0); 304 mpfr_set_prec (x, 2); 305 mpfr_set_ui (x, 7, MPFR_RNDU); 306 MPFR_ASSERTN(mpfr_cmp_ui (x, 8) == 0); 307 emax = mpfr_get_emax (); 308 set_emax (3); 309 mpfr_set_ui (x, 7, MPFR_RNDU); 310 MPFR_ASSERTN(mpfr_inf_p (x) && mpfr_sgn (x) > 0); 311 set_emax (1); 312 MPFR_ASSERTN( mpfr_set_ui (x, 7, MPFR_RNDU) ); 313 MPFR_ASSERTN(mpfr_inf_p (x) && mpfr_sgn (x) > 0); 314 set_emax (emax); 315 mpfr_set_ui_2exp (x, 17, -50, MPFR_RNDN); 316 MPFR_ASSERTN (mpfr_get_ui (x, MPFR_RNDD) == 0); 317 MPFR_ASSERTN (mpfr_get_si (x, MPFR_RNDD) == 0); 318 319 /* Test for ERANGE flag + correct behaviour if overflow */ 320 mpfr_set_prec (x, 256); 321 mpfr_set_ui (x, ULONG_MAX, MPFR_RNDN); 322 mpfr_clear_erangeflag (); 323 dl = mpfr_get_ui (x, MPFR_RNDN); 324 if (dl != ULONG_MAX || mpfr_erangeflag_p ()) 325 { 326 printf ("ERROR for get_ui + ERANGE + ULONG_MAX (1)\n"); 327 exit (1); 328 } 329 mpfr_add_ui (x, x, 1, MPFR_RNDN); 330 dl = mpfr_get_ui (x, MPFR_RNDN); 331 if (dl != ULONG_MAX || !mpfr_erangeflag_p ()) 332 { 333 printf ("ERROR for get_ui + ERANGE + ULONG_MAX (2)\n"); 334 exit (1); 335 } 336 mpfr_set_si (x, -1, MPFR_RNDN); 337 mpfr_clear_erangeflag (); 338 dl = mpfr_get_ui (x, MPFR_RNDN); 339 if (dl != 0 || !mpfr_erangeflag_p ()) 340 { 341 printf ("ERROR for get_ui + ERANGE + -1 \n"); 342 exit (1); 343 } 344 mpfr_set_si (x, LONG_MAX, MPFR_RNDN); 345 mpfr_clear_erangeflag (); 346 d = mpfr_get_si (x, MPFR_RNDN); 347 if (d != LONG_MAX || mpfr_erangeflag_p ()) 348 { 349 printf ("ERROR for get_si + ERANGE + LONG_MAX (1): %ld\n", d); 350 exit (1); 351 } 352 mpfr_add_ui (x, x, 1, MPFR_RNDN); 353 d = mpfr_get_si (x, MPFR_RNDN); 354 if (d != LONG_MAX || !mpfr_erangeflag_p ()) 355 { 356 printf ("ERROR for get_si + ERANGE + LONG_MAX (2)\n"); 357 exit (1); 358 } 359 mpfr_set_si (x, LONG_MIN, MPFR_RNDN); 360 mpfr_clear_erangeflag (); 361 d = mpfr_get_si (x, MPFR_RNDN); 362 if (d != LONG_MIN || mpfr_erangeflag_p ()) 363 { 364 printf ("ERROR for get_si + ERANGE + LONG_MIN (1)\n"); 365 exit (1); 366 } 367 mpfr_sub_ui (x, x, 1, MPFR_RNDN); 368 d = mpfr_get_si (x, MPFR_RNDN); 369 if (d != LONG_MIN || !mpfr_erangeflag_p ()) 370 { 371 printf ("ERROR for get_si + ERANGE + LONG_MIN (2)\n"); 372 exit (1); 373 } 374 375 mpfr_set_nan (x); 376 mpfr_clear_erangeflag (); 377 d = mpfr_get_ui (x, MPFR_RNDN); 378 if (d != 0 || !mpfr_erangeflag_p ()) 379 { 380 printf ("ERROR for get_ui + NaN\n"); 381 exit (1); 382 } 383 mpfr_clear_erangeflag (); 384 d = mpfr_get_si (x, MPFR_RNDN); 385 if (d != 0 || !mpfr_erangeflag_p ()) 386 { 387 printf ("ERROR for get_si + NaN\n"); 388 exit (1); 389 } 390 391 emin = mpfr_get_emin (); 392 mpfr_set_prec (x, 2); 393 394 mpfr_set_emin (4); 395 mpfr_clear_flags (); 396 mpfr_set_ui (x, 7, MPFR_RNDU); 397 flag = mpfr_underflow_p (); 398 mpfr_set_emin (emin); 399 if (mpfr_cmp_ui (x, 8) != 0) 400 { 401 printf ("Error for mpfr_set_ui (x, 7, MPFR_RNDU), prec = 2, emin = 4\n"); 402 exit (1); 403 } 404 if (flag) 405 { 406 printf ("mpfr_set_ui (x, 7, MPFR_RNDU) should not underflow " 407 "with prec = 2, emin = 4\n"); 408 exit (1); 409 } 410 411 mpfr_set_emin (4); 412 mpfr_clear_flags (); 413 mpfr_set_si (x, -7, MPFR_RNDD); 414 flag = mpfr_underflow_p (); 415 mpfr_set_emin (emin); 416 if (mpfr_cmp_si (x, -8) != 0) 417 { 418 printf ("Error for mpfr_set_si (x, -7, MPFR_RNDD), prec = 2, emin = 4\n"); 419 exit (1); 420 } 421 if (flag) 422 { 423 printf ("mpfr_set_si (x, -7, MPFR_RNDD) should not underflow " 424 "with prec = 2, emin = 4\n"); 425 exit (1); 426 } 427 428 mpfr_clear (x); 429 430 test_2exp (); 431 test_macros (); 432 tests_end_mpfr (); 433 return 0; 434} 435