1 /* Test mpz_abs, mpz_add, mpz_cmp, mpz_cmp_ui, mpz_tdiv_qr, mpz_tdiv_q,
4 Copyright 1991, 1993, 1994, 1996, 1997, 2000, 2001 Free Software Foundation, Inc.
6 This file is part of the GNU MP Library.
8 The GNU MP Library is free software; you can redistribute it and/or modify
9 it under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or (at your
11 option) any later version.
13 The GNU MP Library is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
16 License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
28 void dump_abort __GMP_PROTO ((mpz_t, mpz_t));
29 void debug_mp __GMP_PROTO ((mpz_t, int));
32 main (int argc, char **argv)
34 mpz_t dividend, divisor;
35 mpz_t quotient, remainder;
36 mpz_t quotient2, remainder2;
38 mp_size_t dividend_size, divisor_size;
41 gmp_randstate_ptr rands;
43 unsigned long bsi, size_range;
46 TESTS_REPS (reps, argv, argc);
57 mpz_init (remainder2);
60 for (i = 0; i < reps; i++)
62 mpz_urandomb (bs, rands, 32);
63 size_range = mpz_get_ui (bs) % 18 + 2; /* 0..524288 bit operands */
67 mpz_urandomb (bs, rands, size_range);
68 divisor_size = mpz_get_ui (bs);
69 mpz_rrandomb (divisor, rands, divisor_size);
71 while (mpz_sgn (divisor) == 0);
73 mpz_urandomb (bs, rands, size_range);
74 dividend_size = mpz_get_ui (bs) + divisor_size;
75 mpz_rrandomb (dividend, rands, dividend_size);
77 mpz_urandomb (bs, rands, 2);
78 bsi = mpz_get_ui (bs);
80 mpz_neg (dividend, dividend);
82 mpz_neg (divisor, divisor);
84 /* printf ("%ld %ld\n", SIZ (dividend), SIZ (divisor)); */
86 mpz_tdiv_qr (quotient, remainder, dividend, divisor);
87 mpz_tdiv_q (quotient2, dividend, divisor);
88 mpz_tdiv_r (remainder2, dividend, divisor);
90 /* First determine that the quotients and remainders computed
91 with different functions are equal. */
92 if (mpz_cmp (quotient, quotient2) != 0)
93 dump_abort (dividend, divisor);
94 if (mpz_cmp (remainder, remainder2) != 0)
95 dump_abort (dividend, divisor);
97 /* Check if the sign of the quotient is correct. */
98 if (mpz_cmp_ui (quotient, 0) != 0)
99 if ((mpz_cmp_ui (quotient, 0) < 0)
100 != ((mpz_cmp_ui (dividend, 0) ^ mpz_cmp_ui (divisor, 0)) < 0))
101 dump_abort (dividend, divisor);
103 /* Check if the remainder has the same sign as the dividend
104 (quotient rounded towards 0). */
105 if (mpz_cmp_ui (remainder, 0) != 0)
106 if ((mpz_cmp_ui (remainder, 0) < 0) != (mpz_cmp_ui (dividend, 0) < 0))
107 dump_abort (dividend, divisor);
109 mpz_mul (temp, quotient, divisor);
110 mpz_add (temp, temp, remainder);
111 if (mpz_cmp (temp, dividend) != 0)
112 dump_abort (dividend, divisor);
114 mpz_abs (temp, divisor);
115 mpz_abs (remainder, remainder);
116 if (mpz_cmp (remainder, temp) >= 0)
117 dump_abort (dividend, divisor);
121 mpz_clear (dividend);
123 mpz_clear (quotient);
124 mpz_clear (remainder);
125 mpz_clear (quotient2);
126 mpz_clear (remainder2);
134 dump_abort (mpz_t dividend, mpz_t divisor)
136 fprintf (stderr, "ERROR\n");
137 fprintf (stderr, "dividend = "); debug_mp (dividend, -16);
138 fprintf (stderr, "divisor = "); debug_mp (divisor, -16);
143 debug_mp (mpz_t x, int base)
145 mpz_out_str (stderr, base, x); fputc ('\n', stderr);