mirror of
https://github.com/rn10950/RetroZilla.git
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106 lines
2.0 KiB
C
106 lines
2.0 KiB
C
/*
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* mptest4a - modular exponentiation speed test
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include <time.h>
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#include <sys/time.h>
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#include "mpi.h"
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#include "mpprime.h"
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typedef struct {
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unsigned int sec;
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unsigned int usec;
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} instant_t;
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instant_t now(void)
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{
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struct timeval clk;
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instant_t res;
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res.sec = res.usec = 0;
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if(gettimeofday(&clk, NULL) != 0)
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return res;
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res.sec = clk.tv_sec;
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res.usec = clk.tv_usec;
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return res;
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}
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extern mp_err s_mp_pad();
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int main(int argc, char *argv[])
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{
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int ix, num, prec = 8;
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unsigned int d;
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instant_t start, finish;
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time_t seed;
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mp_int a, m, c;
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seed = time(NULL);
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if(argc < 2) {
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fprintf(stderr, "Usage: %s <num-tests> [<precision>]\n", argv[0]);
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return 1;
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}
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if((num = atoi(argv[1])) < 0)
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num = -num;
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if(!num) {
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fprintf(stderr, "%s: must perform at least 1 test\n", argv[0]);
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return 1;
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}
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if(argc > 2) {
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if((prec = atoi(argv[2])) <= 0)
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prec = 8;
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}
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printf("Test 3a: Modular exponentiation timing test\n"
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"Precision: %d digits (%d bits)\n"
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"# of tests: %d\n\n", prec, prec * DIGIT_BIT, num);
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mp_init_size(&a, prec);
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mp_init_size(&m, prec);
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mp_init_size(&c, prec);
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s_mp_pad(&a, prec);
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s_mp_pad(&m, prec);
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s_mp_pad(&c, prec);
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printf("Testing modular exponentiation ... \n");
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srand((unsigned int)seed);
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start = now();
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for(ix = 0; ix < num; ix++) {
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mpp_random(&a);
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mpp_random(&c);
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mpp_random(&m);
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mp_exptmod(&a, &c, &m, &c);
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}
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finish = now();
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d = (finish.sec - start.sec) * 1000000;
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d -= start.usec; d += finish.usec;
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printf("Total time elapsed: %u usec\n", d);
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printf("Time per exponentiation: %u usec (%.3f sec)\n",
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(d / num), (double)(d / num) / 1000000);
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mp_clear(&c);
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mp_clear(&a);
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mp_clear(&m);
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return 0;
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}
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