1int abs (int);
2int find_sad_16x16(int *intra_mode)
3{
4  int current_intra_sad_2,best_intra_sad2;
5  int M1[16][16],M0[4][4][4][4],M3[4],M4[4][4];
6  int i,j,k;
7  int ii,jj;
8  int up_avail, left_avail, left_up_avail;
9  for (i=0;i<17;i++)
10    if (left_up_avail)
11      {
12	for (jj=0;jj<4;jj++)
13	  for (ii=0;ii<4;ii++)
14	    for (j=0;j<4;j++)
15	      for (i=0;i<4;i++)
16		{
17		  M0[i][ii][2][jj]=M3[0]-M3[1];
18		  M0[i][ii][1][jj]=M3[2]+M3[3];
19		  current_intra_sad_2 += abs(M0[i][ii][j][jj]);
20		}
21
22        if(current_intra_sad_2 < best_intra_sad2)
23          best_intra_sad2=current_intra_sad_2;
24      }
25}
26