case 5:
      switch ((indextype[0] << 2) | (indextype[1] << 1) | (indextype[2] << 0)) {
      case 0b000:
        return &prolongate_ddf_3d_rf2_c000_o5;
      case 0b001:
        return &prolongate_ddf_3d_rf2_c001_o5;
      case 0b010:
        return &prolongate_ddf_3d_rf2_c010_o5;
      case 0b011:
        return &prolongate_ddf_3d_rf2_c011_o5;
      case 0b100:
        return &prolongate_ddf_3d_rf2_c100_o5;
      case 0b101:
        return &prolongate_ddf_3d_rf2_c101_o5;
      case 0b110:
        return &prolongate_ddf_3d_rf2_c110_o5;
      case 0b111:
        return &prolongate_ddf_3d_rf2_c111_o5;
      }
      break;

prolongate_3d_rf2<VC, VC, VC, POLY, POLY, POLY, 5, 5, 5>
    prolongate_ddf_3d_rf2_c000_o5;
prolongate_3d_rf2<VC, VC, CC, POLY, POLY, CONS, 5, 5, 4>
    prolongate_ddf_3d_rf2_c001_o5;
prolongate_3d_rf2<VC, CC, VC, POLY, CONS, POLY, 5, 4, 5>
    prolongate_ddf_3d_rf2_c010_o5;
prolongate_3d_rf2<VC, CC, CC, POLY, CONS, CONS, 5, 4, 4>
    prolongate_ddf_3d_rf2_c011_o5;
prolongate_3d_rf2<CC, VC, VC, CONS, POLY, POLY, 4, 5, 5>
    prolongate_ddf_3d_rf2_c100_o5;
prolongate_3d_rf2<CC, VC, CC, CONS, POLY, CONS, 4, 5, 4>
    prolongate_ddf_3d_rf2_c101_o5;
prolongate_3d_rf2<CC, CC, VC, CONS, CONS, POLY, 4, 4, 5>
    prolongate_ddf_3d_rf2_c110_o5;
prolongate_3d_rf2<CC, CC, CC, CONS, CONS, CONS, 4, 4, 4>
    prolongate_ddf_3d_rf2_c111_o5;

extern prolongate_3d_rf2<VC, VC, VC, POLY, POLY, POLY, 5, 5, 5>
    prolongate_ddf_3d_rf2_c000_o5;
extern prolongate_3d_rf2<VC, VC, CC, POLY, POLY, CONS, 5, 5, 4>
    prolongate_ddf_3d_rf2_c001_o5;
extern prolongate_3d_rf2<VC, CC, VC, POLY, CONS, POLY, 5, 4, 5>
    prolongate_ddf_3d_rf2_c010_o5;
extern prolongate_3d_rf2<VC, CC, CC, POLY, CONS, CONS, 5, 4, 4>
    prolongate_ddf_3d_rf2_c011_o5;
extern prolongate_3d_rf2<CC, VC, VC, CONS, POLY, POLY, 4, 5, 5>
    prolongate_ddf_3d_rf2_c100_o5;
extern prolongate_3d_rf2<CC, VC, CC, CONS, POLY, CONS, 4, 5, 4>
    prolongate_ddf_3d_rf2_c101_o5;
extern prolongate_3d_rf2<CC, CC, VC, CONS, CONS, POLY, 4, 4, 5>
    prolongate_ddf_3d_rf2_c110_o5;
extern prolongate_3d_rf2<CC, CC, CC, CONS, CONS, CONS, 4, 4, 4>
    prolongate_ddf_3d_rf2_c111_o5;