mptest-4a.c
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上传日期:2007-01-12
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文件大小:3k
- /*
- * mptest4a - modular exponentiation speed test
- *
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- *
- * The Original Code is the MPI Arbitrary Precision Integer Arithmetic
- * library.
- *
- * The Initial Developer of the Original Code is Michael J. Fromberger.
- * Portions created by Michael J. Fromberger are
- * Copyright (C) 1998, 1999, 2000 Michael J. Fromberger.
- * All Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL"), in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your
- * version of this file only under the terms of the GPL and not to
- * allow others to use your version of this file under the MPL,
- * indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient
- * may use your version of this file under either the MPL or the GPL.
- *
- * $Id: mptest-4a.c,v 1.1 2000/07/14 00:44:43 nelsonb%netscape.com Exp $
- */
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <limits.h>
- #include <time.h>
- #include <sys/time.h>
- #include "mpi.h"
- #include "mpprime.h"
- typedef struct {
- unsigned int sec;
- unsigned int usec;
- } instant_t;
- instant_t now(void)
- {
- struct timeval clk;
- instant_t res;
- res.sec = res.usec = 0;
- if(gettimeofday(&clk, NULL) != 0)
- return res;
- res.sec = clk.tv_sec;
- res.usec = clk.tv_usec;
- return res;
- }
- extern mp_err s_mp_pad();
- int main(int argc, char *argv[])
- {
- int ix, num, prec = 8;
- unsigned int d;
- instant_t start, finish;
- time_t seed;
- mp_int a, m, c;
- seed = time(NULL);
- if(argc < 2) {
- fprintf(stderr, "Usage: %s <num-tests> [<precision>]n", argv[0]);
- return 1;
- }
- if((num = atoi(argv[1])) < 0)
- num = -num;
- if(!num) {
- fprintf(stderr, "%s: must perform at least 1 testn", argv[0]);
- return 1;
- }
- if(argc > 2) {
- if((prec = atoi(argv[2])) <= 0)
- prec = 8;
- }
-
- printf("Test 3a: Modular exponentiation timing testn"
- "Precision: %d digits (%d bits)n"
- "# of tests: %dnn", prec, prec * DIGIT_BIT, num);
- mp_init_size(&a, prec);
- mp_init_size(&m, prec);
- mp_init_size(&c, prec);
- s_mp_pad(&a, prec);
- s_mp_pad(&m, prec);
- s_mp_pad(&c, prec);
- printf("Testing modular exponentiation ... n");
- srand((unsigned int)seed);
- start = now();
- for(ix = 0; ix < num; ix++) {
- mpp_random(&a);
- mpp_random(&c);
- mpp_random(&m);
- mp_exptmod(&a, &c, &m, &c);
- }
- finish = now();
- d = (finish.sec - start.sec) * 1000000;
- d -= start.usec; d += finish.usec;
- printf("Total time elapsed: %u usecn", d);
- printf("Time per exponentiation: %u usec (%.3f sec)n",
- (d / num), (double)(d / num) / 1000000);
- mp_clear(&c);
- mp_clear(&a);
- mp_clear(&m);
- return 0;
- }