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