#include <stdio.h>

#include <sys/time.h>

#include <string.h>

union data

{

    unsigned char str[];

    unsigned long long ll_value[];

    unsigned int i_value[];

};

int main(int argc, char **argv)

{

    union data a;

    union data b;

    struct timeval start, end;

    int i = ;

    memset((char *)&a, , );

    memset((char *)&b, , );

    gettimeofday(&start, NULL);

    for (i = ; i < ; i++)

    {

        a.str[i] = a.str[i] ^ b.str[i];

    }

    gettimeofday(&end, NULL);

    printf("take %dus \n", (int)(((end.tv_sec-start.tv_sec)*+end.tv_usec)-start.tv_usec));

    gettimeofday(&start, NULL);

    for (i = ; i < ; i++)

    {

        a.ll_value[i] = a.ll_value[i] ^ b.ll_value[i];

    }

    gettimeofday(&end, NULL);

    printf("take %dus \n", (int)(((end.tv_sec-start.tv_sec)*+end.tv_usec)-start.tv_usec));

    gettimeofday(&start, NULL);

    for (i = ; i < ; i++)

    {

        a.i_value[i] = a.i_value[i] ^ b.i_value[i];

    }

    gettimeofday(&end, NULL);

    printf("take %dus \n", (int)(((end.tv_sec-start.tv_sec)*+end.tv_usec)-start.tv_usec));

　　return 0;

}