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dependency_chain5.c
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dependency_chain5.c
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/*
* Copyright (C) 2014 Marco Antonio Zanata Alves (mazalves at inf.ufrgs.br)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <inttypes.h>
// =============================================================================
uint64_t string_to_uint64(char *string) {
uint64_t result = 0;
char c;
for ( ; (c = *string ^ '0') <= 9 && c >= 0; ++string) {
result = result * 10 + c;
}
return result;
};
// =============================================================================
int main (int argc, char *argv[]) {
uint64_t repetitions;
if(argc == 2) {
repetitions = string_to_uint64(argv[1]);
}
else {
printf("Please provide the number of repetitions.\n");
exit(EXIT_FAILURE);
}
uint64_t i = 0;
uint64_t count0 = 0;
uint64_t count1 = 0;
uint64_t count2 = 0;
uint64_t count3 = 0;
uint64_t count4 = 0;
asm volatile ("nop");
asm volatile ("nop");
asm volatile ("nop");
for (i=0; i<repetitions; i++) {
asm volatile("add %0, %1, %2" : "=r" (count0) : "r" (count0), "r" (count0));
asm volatile("add %0, %1, %2" : "=r" (count1) : "r" (count1), "r" (count1));
asm volatile("add %0, %1, %2" : "=r" (count2) : "r" (count2), "r" (count2));
asm volatile("add %0, %1, %2" : "=r" (count3) : "r" (count3), "r" (count3));
asm volatile("add %0, %1, %2" : "=r" (count4) : "r" (count4), "r" (count4));
asm volatile("add %0, %1, %2" : "=r" (count0) : "r" (count0), "r" (count0));
asm volatile("add %0, %1, %2" : "=r" (count1) : "r" (count1), "r" (count1));
asm volatile("add %0, %1, %2" : "=r" (count2) : "r" (count2), "r" (count2));
asm volatile("add %0, %1, %2" : "=r" (count3) : "r" (count3), "r" (count3));
asm volatile("add %0, %1, %2" : "=r" (count4) : "r" (count4), "r" (count4));
asm volatile("add %0, %1, %2" : "=r" (count0) : "r" (count0), "r" (count0));
asm volatile("add %0, %1, %2" : "=r" (count1) : "r" (count1), "r" (count1));
asm volatile("add %0, %1, %2" : "=r" (count2) : "r" (count2), "r" (count2));
asm volatile("add %0, %1, %2" : "=r" (count3) : "r" (count3), "r" (count3));
asm volatile("add %0, %1, %2" : "=r" (count4) : "r" (count4), "r" (count4));
asm volatile("add %0, %1, %2" : "=r" (count0) : "r" (count0), "r" (count0));
asm volatile("add %0, %1, %2" : "=r" (count1) : "r" (count1), "r" (count1));
asm volatile("add %0, %1, %2" : "=r" (count2) : "r" (count2), "r" (count2));
asm volatile("add %0, %1, %2" : "=r" (count3) : "r" (count3), "r" (count3));
asm volatile("add %0, %1, %2" : "=r" (count4) : "r" (count4), "r" (count4));
asm volatile("add %0, %1, %2" : "=r" (count0) : "r" (count0), "r" (count0));
asm volatile("add %0, %1, %2" : "=r" (count1) : "r" (count1), "r" (count1));
asm volatile("add %0, %1, %2" : "=r" (count2) : "r" (count2), "r" (count2));
asm volatile("add %0, %1, %2" : "=r" (count3) : "r" (count3), "r" (count3));
asm volatile("add %0, %1, %2" : "=r" (count4) : "r" (count4), "r" (count4));
asm volatile("add %0, %1, %2" : "=r" (count0) : "r" (count0), "r" (count0));
asm volatile("add %0, %1, %2" : "=r" (count1) : "r" (count1), "r" (count1));
asm volatile("add %0, %1, %2" : "=r" (count2) : "r" (count2), "r" (count2));
asm volatile("add %0, %1, %2" : "=r" (count3) : "r" (count3), "r" (count3));
asm volatile("add %0, %1, %2" : "=r" (count4) : "r" (count4), "r" (count4));
}
asm volatile ("nop");
asm volatile ("nop");
asm volatile ("nop");
printf("%"PRIu64"\n", count0);
exit(EXIT_SUCCESS);
}