212   PetscMPIInt     n15, n16, n17, n18, n19, n20, n21, n22, n23, n24, n25, n26;  in DMSetUp_DA_3D()  local
568   n20 = rank + m * n - m + 1;  in DMSetUp_DA_3D()
597     n20 = rank - 2 * m + 1 + (m * n);  in DMSetUp_DA_3D()
611     n20 = rank + m * (n - 1) + 1 + (m * n);  in DMSetUp_DA_3D()
641     n20 = (m * n) - (size - rank) - m + 1;  in DMSetUp_DA_3D()
681     n20 = m * n - (size - rank) - (m - 1) - m;  in DMSetUp_DA_3D()
689     n20 = rank + m * (n - 1) - (m - 1) + m * n;  in DMSetUp_DA_3D()
707     n20 = m * n - (size - rank) + m * (n - 1) + 1;  in DMSetUp_DA_3D()
728   if ((xe == M) && (ys == 0) && (ze == P)) n20 = m * n - m;  in DMSetUp_DA_3D()
737     if (xe == M) n2 = n5 = n8 = n11 = n14 = n17 = n20 = n23 = n26 = -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()
774   dd->neighbors[20] = n20;  in DMSetUp_DA_3D()
799     sn20 = n20;  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()
999       if (n20 >= 0) { /* right below */  in DMSetUp_DA_3D()
1000         x_t = lx[n20 % m];  in DMSetUp_DA_3D()
1001         y_t = ly[(n20 % (m * n)) / m];  in DMSetUp_DA_3D()
1003         s_t = bases[n20] - (s_y + 1 - i) * x_t + (k + 1) * x_t * y_t;  in DMSetUp_DA_3D()
1004 …  if (twod && (s_t >= M * N * P)) s_t = bases[n20] - (s_y + 1 - i) * x_t + x_t * y_t; /* 2d case */  in DMSetUp_DA_3D()
1088     n20 = sn20;  in DMSetUp_DA_3D()
1327         if (n20 >= 0) { /* right below */  in DMSetUp_DA_3D()
1328           x_t = lx[n20 % m];  in DMSetUp_DA_3D()
1329           y_t = ly[(n20 % (m * n)) / m];  in DMSetUp_DA_3D()
1331           s_t = bases[n20] - (s_y + 1 - i) * x_t + (k + 1) * x_t * y_t;  in DMSetUp_DA_3D()