#ifndef GETTIME_H

#define GETTIME_H

#include <sys/time.h>

#define rdtscll(val) \

        __asm__ __volatile__("rdtsc" : "=A" (val))

#ifdef __i386__

#define TIME(str, exp) { \

    long long _then, _now, best = 1000000000; \

    int i; \

    for (i=0; i<10; i++) { \

	    rdtscll(_then); \

	    exp; \

	    rdtscll(_now); \

	    if (_now - _then < best) { \

		best = _now - _then; \

	    } \

    } \

    printf(str " took %.1f cycles/sample\n", (double)best/(double)SIZE); \

}

#else

#define TIME(str, exp) { \

    double _then, _now; \

    _then = gettime(); \

    exp; \

    _now = gettime(); \

    printf(str " took %f us/sample\n", 1000000.0 * (_now-_then) / (double)SIZE); \

}

#endif

static inline double gettime()

{

    struct timeval tv;

    gettimeofday(&tv, NULL);

    return (double)(tv.tv_usec * 1.0e-6) + (double)(tv.tv_sec);

}

#endif