diff options
Diffstat (limited to 'nexus/arch.cc')
| -rw-r--r-- | nexus/arch.cc | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/nexus/arch.cc b/nexus/arch.cc index f3430968..3f3d8c83 100644 --- a/nexus/arch.cc +++ b/nexus/arch.cc @@ -967,6 +967,48 @@ TimingPortClass Arch::lookup_port_type(int type_idx, IdString port, PortType dir return lookup_cell_delay(type_idx, clock, port, dly) ? TMG_REGISTER_OUTPUT : TMG_COMB_OUTPUT; } } +// ----------------------------------------------------------------------- + +bool Arch::getClusterPlacement(ClusterId cluster, BelId root_bel, + std::vector<std::pair<CellInfo *, BelId>> &placement) const +{ + CellInfo *root_cell = cells.at(cluster).get(); + placement.clear(); + NPNR_ASSERT(root_bel != BelId()); + Loc root_loc = getBelLocation(root_bel); + + if (root_cell->constr_abs_z) { + // Coerce root to absolute z constraint + root_loc.z = root_cell->constr_z; + root_bel = getBelByLocation(root_loc); + if (root_bel == BelId() || !isValidBelForCellType(root_cell->type, root_bel)) + return false; + } + placement.emplace_back(root_cell, root_bel); + + for (auto child : root_cell->constr_children) { + Loc child_loc; + child_loc.x = root_loc.x + child->constr_x; + child_loc.y = root_loc.y + child->constr_y; + child_loc.z = child->constr_abs_z ? child->constr_z : (root_loc.z + child->constr_z); + BelId child_bel = getBelByLocation(child_loc); + if (child_bel == BelId() || !isValidBelForCellType(child->type, child_bel)) { + // Special case for DSPs where the delta is sometimes different + bool fixed = false; + if (child->type == id_REG18_CORE && root_cell->is_9x9_18x18) { + child_loc.x -= 1; + child_loc.z += 2; + child_bel = getBelByLocation(child_loc); + if (child_bel != BelId() && isValidBelForCellType(child->type, child_bel)) + fixed = true; + } + if (!fixed) + return false; + } + placement.emplace_back(child, child_bel); + } + return true; +} // ----------------------------------------------------------------------- |