Error in my sse2 code

//.h file
#ifndef _SSEEXAMPLE1_H
#define _SSEEXAMPLE1_H
#include <emmintrin.h>
class sseexample1
{
public:
    void charles(__m128i *x, __m128i *y);
};
#endif
//,cpp file
#include "stdafx.h"
#include <stdio.h>
#include <emmintrin.h>
#include "sseexample1.h"
void sseexample1::charles(__m128i* x,__m128i* y)
{
for (int j = 0;j<4;j++)
{
*&y[j] = _mm_add_epi16(*&x[j],*&x[j+1]);
}
}
//main.cpp file
#include "stdafx.h"
#include <stdio.h>
#include <emmintrin.h>
#include "sseexample1.h"
#include <iostream>
using namespace std;
int _tmain(int argc, _TCHAR* argv[])
{
    int x[2][4]={1,1,1,1,2,2,2,2};
    int y[2][4];
    sseexample1 z;
    z.charles(x,y);//error C2664: 'sseexample1::charles' : cannot convert parameter 1 from 'int [2][4]' to '__m128i *'
    for (int j = 0; j < 4; j++)
        cout << y[j] << " ";
          cout << endl;
    return 0;
}