intel-avx

intel-avx-test.c

#include <stdio.h>
#include <time.h>

#define YOUR_CLOCK_MH (1600)
#define COUNT  (64)

int main()
{
  unsigned long long i, j;
  float s[COUNT];
  float r = 0;
  
  for(i=0; i<COUNT; i++)
    s[i] = clock();

  for(i=0; i<(unsigned long long)1000 * 1000 * YOUR_CLOCK_MH; i++) {
    for(j=0; j<COUNT; j++)
      s[j] += 3.89;
  }

  for(i=0; i<COUNT; i++)
    r += s[i];
  printf("%f\n", r);
  printf("Time in: %d\n", clock());
  return 0;
}

Makefile

all:
	gcc intel-avx-test.c -O3 -o a.out
	gcc intel-avx-test.c -O3 -S
	./a.out
nosse:
	gcc intel-avx-test.c -O3 -mno-sse -o a.out
	gcc intel-avx-test.c -O3 -S -mno-sse 
	./a.out
std:
	gcc intel-avx-test.c -O3 -std=c99 -o a.out
	./a.out
avx:
	gcc intel-avx-test.c -O3 -mavx -o a.out
	gcc intel-avx-test.c -O3 -S -mavx
	./a.out
avx2:
	gcc intel-avx-test.c -O3 -mavx2 -o a.out
	gcc intel-avx-test.c -O3 -S -mavx2
	./a.out