1 /** @file time_lw_C.cpp
3 * Test C from the paper "Comparison of Polynomial-Oriented CAS" by Robert H.
4 * Lewis and Michael Wester. */
7 * GiNaC Copyright (C) 1999-2003 Johannes Gutenberg University Mainz, Germany
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 static unsigned test(void)
31 for (int i=1; i<200; ++i)
32 gcd(pow(x,300+(i%181)),pow(y,200+(i%183)));
34 ex lastgcd = gcd(pow(x,300+(200%181)),pow(y,200+(200%183)));
35 if (lastgcd != numeric("53174994123961114423610399251974962981084780166115806651505844915220196792416194060680805428433601792982500430324916963290494659936522782673704312949880308677990050199363768068005367578752699785180694630122629259539608472261461289805919741933")) {
36 clog << "gcd(" << x << "^" << 300+(200%181) << ","
37 << y << "^" << 200+(200%183) << ") erroneously returned "
44 unsigned time_lw_C(void)
51 cout << "timing Lewis-Wester test C (gcd of big integers)" << flush;
52 clog << "-------Lewis-Wester test C (gcd of big integers):" << endl;
55 // correct for very small times:
59 } while ((time=rolex.read())<0.1 && !result);
64 clog << "(no output)" << endl;
68 cout << int(1000*(time/count))*0.001 << 's' << endl;