LMBench ops model example

foo.c

#include <stdint.h>

#define TEN(a) a a a a a a a a a a

static volatile uint64_t  use_result_dummy;
void
use_int(int result) { use_result_dummy += result; }

void
do_int64_mul(unsigned int iterations, unsigned int N)
{
	register int64_t r = (int64_t)N + 37420;
	register int64_t s = (int64_t)N + 4;
	register int64_t t;

	r += (int64_t)(N + 6)<<32;
	t = r * s * s * s * s * s * s * s * s * s * s - r;

	while (iterations-- > 0) {
		TEN(r *= s;); r -= t;
		TEN(r *= s;); r -= t;
	}
	use_int((int)r);
}

int main(int argc, char **argv)
{
	int i;

	for (i = 0; i < 30; i++) 
		do_int64_mul(153592747 ,1);
	return 0;
}