| Austin Schuh | dace2a6 | 2020-08-18 10:56:48 -0700 | [diff] [blame] | 1 | /* Tests the (internal) function mpz_lucas_mod |
| 2 | |
| 3 | Copyright 2018, Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of the GNU MP Library test suite. |
| 6 | |
| 7 | The GNU MP Library test suite is free software; you can redistribute it |
| 8 | and/or modify it under the terms of the GNU General Public License as |
| 9 | published by the Free Software Foundation; either version 3 of the License, |
| 10 | or (at your option) any later version. |
| 11 | |
| 12 | The GNU MP Library test suite is distributed in the hope that it will be |
| 13 | useful, but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
| 15 | Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License along with |
| 18 | the GNU MP Library test suite. If not, see https://www.gnu.org/licenses/. */ |
| 19 | |
| 20 | #include <limits.h> |
| 21 | #include <stdlib.h> |
| 22 | #include <stdio.h> |
| 23 | #include <string.h> |
| 24 | |
| 25 | #include "testutils.h" |
| 26 | |
| 27 | #define MAXBITS 100 |
| 28 | #define COUNT 1000 |
| 29 | |
| 30 | void |
| 31 | testmain (int argc, char **argv) |
| 32 | { |
| 33 | unsigned i; |
| 34 | mpz_t m, vr, qr, vm, qm, vt; |
| 35 | int resm, resr; |
| 36 | long Q; |
| 37 | unsigned long b0; |
| 38 | |
| 39 | mpz_init (m); |
| 40 | mpz_init (vr); |
| 41 | mpz_init (qr); |
| 42 | mpz_init (vm); |
| 43 | mpz_init (qm); |
| 44 | mpz_init (vt); |
| 45 | |
| 46 | for (i = 0; i < COUNT; i++) |
| 47 | { |
| 48 | mini_random_lucm_op (MAXBITS, vr, qr, m, &Q, &b0, &resr); |
| 49 | if (b0 == 0) |
| 50 | { |
| 51 | fprintf (stderr, "lucas_mod: test disabled (%u tests done).\n", i); |
| 52 | break; |
| 53 | } |
| 54 | resm = mpz_lucas_mod (vm, qm, Q, b0, m); |
| 55 | |
| 56 | if (resr != resm) |
| 57 | { |
| 58 | if (resm != 0 || mpz_cmp_ui (vm, 0) != 0) |
| 59 | { |
| 60 | fprintf (stderr, "mpz_lucas_mod wrong return value (%d != %d):\n", resr, resm); |
| 61 | fprintf (stderr, "Q = %ld , b0 = %lu\n", Q, b0); |
| 62 | dump ("m", m); |
| 63 | dump ("vm", vm); |
| 64 | dump ("qm", qm); |
| 65 | abort (); |
| 66 | } |
| 67 | } |
| 68 | else if (resm == 0) |
| 69 | { |
| 70 | mpz_abs (vr, vr); |
| 71 | mpz_sub (vt, m, vr); |
| 72 | mpz_abs (vm, vm); |
| 73 | mpz_mod (qm, qm, m); |
| 74 | if (mpz_cmp_ui (qr, 0) < 0) |
| 75 | mpz_add (qr, qr, m); |
| 76 | if (mpz_cmp (qm, qr) != 0 || |
| 77 | (mpz_cmp (vm, vr) != 0 && mpz_cmp (vm, vt) != 0)) |
| 78 | { |
| 79 | fprintf (stderr, "mpz_lucas_mod error:\n"); |
| 80 | fprintf (stderr, "Q = %ld , b0 = %lu\n", Q, b0); |
| 81 | dump ("m", m); |
| 82 | dump ("vm", vm); |
| 83 | dump ("vr", vr); |
| 84 | dump ("vt", vt); |
| 85 | dump ("qm", qm); |
| 86 | dump ("qr", qr); |
| 87 | abort (); |
| 88 | } |
| 89 | |
| 90 | } |
| 91 | } |
| 92 | mpz_clear (m); |
| 93 | mpz_clear (vr); |
| 94 | mpz_clear (qr); |
| 95 | mpz_clear (vm); |
| 96 | mpz_clear (qm); |
| 97 | mpz_clear (vt); |
| 98 | } |