1 /* Copyright 2006, 2007, 2009, 2010 Free Software Foundation, Inc.
3 This program is free software; you can redistribute it and/or modify it under
4 the terms of the GNU General Public License as published by the Free Software
5 Foundation; either version 3 of the License, or (at your option) any later
8 This program is distributed in the hope that it will be useful, but WITHOUT ANY
9 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
10 PARTICULAR PURPOSE. See the GNU General Public License for more details.
12 You should have received a copy of the GNU General Public License along with
13 this program. If not, see http://www.gnu.org/licenses/. */
16 #include <stdlib.h> /* for strtol */
17 #include <stdio.h> /* for printf */
22 #include "tests/tests.h"
26 dumpy (mp_srcptr p, mp_size_t n)
31 for (i = n - 1; i >= n - 4; i--)
33 printf ("%0*lx", (int) (2 * sizeof (mp_limb_t)), p[i]);
37 for (i = 3; i >= 0; i--)
39 printf ("%0*lx", (int) (2 * sizeof (mp_limb_t)), p[i]);
40 printf (" " + (i == 0));
45 for (i = n - 1; i >= 0; i--)
47 printf ("%0*lx", (int) (2 * sizeof (mp_limb_t)), p[i]);
48 printf (" " + (i == 0));
54 static unsigned long test;
57 check_one (mp_ptr qp, mp_srcptr rp, mp_limb_t rh,
58 mp_srcptr np, mp_size_t nn, mp_srcptr dp, mp_size_t dn, char *fname)
63 mp_limb_t cy = 4711; /* silence warnings */
73 tp = TMP_ALLOC_LIMBS (nn + 1);
76 mpn_mul (tp, dp, dn, qp, qn);
78 mpn_mul (tp, qp, qn, dp, dn);
82 cy = mpn_add_n (tp + qn, tp + qn, rp, dn);
83 cmp = cy != rh || mpn_cmp (tp, np, nn) != 0;
86 cmp = mpn_cmp (tp, np, nn - dn) != 0;
90 printf ("\r*******************************************************************************\n");
91 printf ("%s inconsistent in test %lu\n", fname, test);
92 printf ("N= "); dumpy (np, nn);
93 printf ("D= "); dumpy (dp, dn);
94 printf ("Q= "); dumpy (qp, qn);
97 printf ("R= "); dumpy (rp, dn);
98 printf ("Rb= %d, Cy=%d\n", (int) cy, (int) rh);
100 printf ("T= "); dumpy (tp, nn);
101 printf ("nn = %ld, dn = %ld, qn = %ld", nn, dn, qn);
102 printf ("\n*******************************************************************************\n");
110 /* These are *bit* sizes. */
112 #define MAX_DN (1L << SIZE_LOG)
113 #define MAX_NN (1L << (SIZE_LOG + 1))
118 random_word (gmp_randstate_ptr rs)
126 mpz_urandomb (x, rs, 32);
133 main (int argc, char **argv)
135 gmp_randstate_ptr rands;
136 unsigned long maxnbits, maxdbits, nbits, dbits;
138 mp_size_t maxnn, maxdn, nn, dn, clearn, i;
139 mp_ptr np, dp, qp, rp;
146 mp_size_t alloc, itch;
147 mp_limb_t rran0, rran1, qran0, qran1;
153 count = strtol (argv[1], &end, 0);
154 if (*end || count <= 0)
156 fprintf (stderr, "Invalid test count: %s.\n", argv[1]);
172 maxnn = maxnbits / GMP_NUMB_BITS + 1;
173 maxdn = maxdbits / GMP_NUMB_BITS + 1;
177 qp = TMP_ALLOC_LIMBS (maxnn + 2) + 1;
178 rp = TMP_ALLOC_LIMBS (maxnn + 2) + 1;
181 scratch = __GMP_ALLOCATE_FUNC_LIMBS (alloc);
183 for (test = 0; test < count;)
185 nbits = random_word (rands) % (maxnbits - GMP_NUMB_BITS) + 2 * GMP_NUMB_BITS;
186 if (maxdbits > nbits)
187 dbits = random_word (rands) % nbits + 1;
189 dbits = random_word (rands) % maxdbits + 1;
192 #define RANDFUNC mpz_urandomb
194 #define RANDFUNC mpz_rrandomb
199 RANDFUNC (n, rands, nbits);
202 RANDFUNC (d, rands, dbits);
204 while (mpz_sgn (d) == 0);
215 mpz_urandomb (tz, rands, 32);
219 dp[0] = GMP_NUMB_MAX;
224 clearn = random_word (rands) % nn;
225 for (i = 0; i <= clearn; i++)
229 mpn_sub_1 (np + nn - dn, dp, dn, random_word (rands));
232 mpn_add_1 (np + nn - dn, dp, dn, random_word (rands));
238 binvert_limb (dinv, dp[0]);
240 rran0 = random_word (rands);
241 rran1 = random_word (rands);
242 qran0 = random_word (rands);
243 qran1 = random_word (rands);
246 qp[nn - dn + 1] = qran1;
249 ran = random_word (rands);
251 if ((double) (nn - dn) * dn < 1e5)
255 /* Test mpn_sbpi1_bdiv_qr */
256 MPN_ZERO (qp, nn - dn);
258 MPN_COPY (rp, np, nn);
259 rh = mpn_sbpi1_bdiv_qr (qp, rp, nn, dp, dn, -dinv);
260 ASSERT_ALWAYS (qp[-1] == qran0); ASSERT_ALWAYS (qp[nn - dn + 1] == qran1);
261 ASSERT_ALWAYS (rp[-1] == rran0);
262 check_one (qp, rp + nn - dn, rh, np, nn, dp, dn, "mpn_sbpi1_bdiv_qr");
267 /* Test mpn_sbpi1_bdiv_q */
268 MPN_COPY (rp, np, nn);
269 MPN_ZERO (qp, nn - dn);
270 mpn_sbpi1_bdiv_q (qp, rp, nn - dn, dp, MIN(dn,nn-dn), -dinv);
271 ASSERT_ALWAYS (qp[-1] == qran0); ASSERT_ALWAYS (qp[nn - dn + 1] == qran1);
272 ASSERT_ALWAYS (rp[-1] == rran0);
273 check_one (qp, NULL, 0, np, nn, dp, dn, "mpn_sbpi1_bdiv_q");
277 if (dn >= 4 && nn - dn >= 2)
279 /* Test mpn_dcpi1_bdiv_qr */
280 MPN_COPY (rp, np, nn);
281 MPN_ZERO (qp, nn - dn);
282 rh = mpn_dcpi1_bdiv_qr (qp, rp, nn, dp, dn, -dinv);
283 ASSERT_ALWAYS (qp[-1] == qran0); ASSERT_ALWAYS (qp[nn - dn + 1] == qran1);
284 ASSERT_ALWAYS (rp[-1] == rran0);
285 check_one (qp, rp + nn - dn, rh, np, nn, dp, dn, "mpn_dcpi1_bdiv_qr");
288 if (dn >= 4 && nn - dn >= 2)
290 /* Test mpn_dcpi1_bdiv_q */
291 MPN_COPY (rp, np, nn);
292 MPN_ZERO (qp, nn - dn);
293 mpn_dcpi1_bdiv_q (qp, rp, nn - dn, dp, MIN(dn,nn-dn), -dinv);
294 ASSERT_ALWAYS (qp[-1] == qran0); ASSERT_ALWAYS (qp[nn - dn + 1] == qran1);
295 ASSERT_ALWAYS (rp[-1] == rran0);
296 check_one (qp, NULL, 0, np, nn, dp, dn, "mpn_dcpi1_bdiv_q");
299 if (nn - dn < 2 || dn < 2)
302 /* Test mpn_mu_bdiv_qr */
303 itch = mpn_mu_bdiv_qr_itch (nn, dn);
304 if (itch + 1 > alloc)
306 scratch = __GMP_REALLOCATE_FUNC_LIMBS (scratch, alloc, itch + 1);
310 MPN_ZERO (qp, nn - dn);
313 rh = mpn_mu_bdiv_qr (qp, rp, np, nn, dp, dn, scratch);
314 ASSERT_ALWAYS (ran == scratch[itch]);
315 ASSERT_ALWAYS (qp[-1] == qran0); ASSERT_ALWAYS (qp[nn - dn + 1] == qran1);
316 ASSERT_ALWAYS (rp[-1] == rran0); ASSERT_ALWAYS (rp[dn] == rran1);
317 check_one (qp, rp, rh, np, nn, dp, dn, "mpn_mu_bdiv_qr");
319 /* Test mpn_mu_bdiv_q */
320 itch = mpn_mu_bdiv_q_itch (nn, dn);
321 if (itch + 1 > alloc)
323 scratch = __GMP_REALLOCATE_FUNC_LIMBS (scratch, alloc, itch + 1);
327 MPN_ZERO (qp, nn - dn + 1);
328 mpn_mu_bdiv_q (qp, np, nn - dn, dp, dn, scratch);
329 ASSERT_ALWAYS (ran == scratch[itch]);
330 ASSERT_ALWAYS (qp[-1] == qran0); ASSERT_ALWAYS (qp[nn - dn + 1] == qran1);
331 check_one (qp, NULL, 0, np, nn, dp, dn, "mpn_mu_bdiv_q");
334 __GMP_FREE_FUNC_LIMBS (scratch, alloc);