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/*
* Simple test driver for MPI library
*
* Test 3a: Multiplication vs. squaring timing test
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <limits.h>
#include <time.h>
#include "mpi.h"
#include "mpprime.h"
int
main(int argc, char *argv[])
{
int ix, num, prec = 8;
double d1, d2;
clock_t start, finish;
time_t seed;
mp_int a, c, d;
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 test\n", argv[0]);
return 1;
}
if (argc > 2) {
if ((prec = atoi(argv[2])) <= 0)
prec = 8;
else
prec = (prec + (DIGIT_BIT - 1)) / DIGIT_BIT;
}
printf("Test 3a: Multiplication vs squaring timing test\n"
"Precision: %d digits (%u bits)\n"
"# of tests: %d\n\n",
prec, prec * DIGIT_BIT, num);
mp_init_size(&a, prec);
mp_init(&c);
mp_init(&d);
printf("Verifying accuracy ... \n");
srand((unsigned int)seed);
for (ix = 0; ix < num; ix++) {
mpp_random_size(&a, prec);
mp_mul(&a, &a, &c);
mp_sqr(&a, &d);
if (mp_cmp(&c, &d) != 0) {
printf("Error! Results not accurate:\n");
printf("a = ");
mp_print(&a, stdout);
fputc('\n', stdout);
printf("c = ");
mp_print(&c, stdout);
fputc('\n', stdout);
printf("d = ");
mp_print(&d, stdout);
fputc('\n', stdout);
mp_sub(&c, &d, &d);
printf("dif ");
mp_print(&d, stdout);
fputc('\n', stdout);
mp_clear(&c);
mp_clear(&d);
mp_clear(&a);
return 1;
}
}
printf("Accuracy is confirmed for the %d test samples\n", num);
mp_clear(&d);
printf("Testing squaring ... \n");
srand((unsigned int)seed);
start = clock();
for (ix = 0; ix < num; ix++) {
mpp_random_size(&a, prec);
mp_sqr(&a, &c);
}
finish = clock();
d2 = (double)(finish - start) / CLOCKS_PER_SEC;
printf("Testing multiplication ... \n");
srand((unsigned int)seed);
start = clock();
for (ix = 0; ix < num; ix++) {
mpp_random(&a);
mp_mul(&a, &a, &c);
}
finish = clock();
d1 = (double)(finish - start) / CLOCKS_PER_SEC;
printf("Multiplication time: %.3f sec (%.3f each)\n", d1, d1 / num);
printf("Squaring time: %.3f sec (%.3f each)\n", d2, d2 / num);
printf("Improvement: %.2f%%\n", (1.0 - (d2 / d1)) * 100.0);
mp_clear(&c);
mp_clear(&a);
return 0;
}
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