212   PetscMPIInt     n15, n16, n17, n18, n19, n20, n21, n22, n23, n24, n25, n26;  in DMSetUp_DA_3D()  local
566   n18 = rank + m * n - m - 1;  in DMSetUp_DA_3D()
585     n18 = rank - 1 + (m * n);  in DMSetUp_DA_3D()
609     n18 = rank + m * (n - 1) - 1 + (m * n);  in DMSetUp_DA_3D()
639     n18 = (m * n) - (size - rank) - m - 1;  in DMSetUp_DA_3D()
657     n18 = m * n - (size - rank) + m - 1 - m;  in DMSetUp_DA_3D()
665     n18 = rank + m * n - 1 + m * n;  in DMSetUp_DA_3D()
705     n18 = m * n - (size - rank) + m * (n - 1) - 1;  in DMSetUp_DA_3D()
724   if ((xs == 0) && (ys == 0) && (ze == P)) n18 = m * n - 1;  in DMSetUp_DA_3D()
736     if (xs == 0) n0 = n3 = n6 = n9 = n12 = n15 = n18 = n21 = n24 = -2;  in DMSetUp_DA_3D()
742     if (ys == 0) n0 = n1 = n2 = n9 = n10 = n11 = n18 = n19 = n20 = -2;  in DMSetUp_DA_3D()
749     if (ze == P) n18 = n19 = n20 = n21 = n22 = n23 = n24 = n25 = n26 = -2;  in DMSetUp_DA_3D()
772   dd->neighbors[18] = n18;  in DMSetUp_DA_3D()
797     sn18 = n18;  in DMSetUp_DA_3D()
805 …n0 = n1 = n2 = n3 = n5 = n6 = n7 = n8 = n9 = n11 = n15 = n17 = n18 = n19 = n20 = n21 = n23 = n24 =…  in DMSetUp_DA_3D()
983       if (n18 >= 0) { /* left below */  in DMSetUp_DA_3D()
984         x_t = lx[n18 % m];  in DMSetUp_DA_3D()
985         y_t = ly[(n18 % (m * n)) / m];  in DMSetUp_DA_3D()
987         s_t = bases[n18] - (s_y - i) * x_t - s_x + (k + 1) * x_t * y_t;  in DMSetUp_DA_3D()
988 …if (twod && (s_t >= M * N * P)) s_t = bases[n18] - (s_y - i) * x_t - s_x + x_t * y_t; /* 2d case */  in DMSetUp_DA_3D()
1086     n18 = sn18;  in DMSetUp_DA_3D()
1309         if (n18 >= 0) { /* left below */  in DMSetUp_DA_3D()
1310           x_t = lx[n18 % m];  in DMSetUp_DA_3D()
1311           y_t = ly[(n18 % (m * n)) / m];  in DMSetUp_DA_3D()
1313           s_t = bases[n18] - (s_y - i) * x_t - s_x + (k + 1) * x_t * y_t;  in DMSetUp_DA_3D()