diff options
Diffstat (limited to 'gowin/pack.cc')
| -rw-r--r-- | gowin/pack.cc | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/gowin/pack.cc b/gowin/pack.cc index cb63f1c9..553eeb4e 100644 --- a/gowin/pack.cc +++ b/gowin/pack.cc @@ -629,7 +629,7 @@ static void pack_constants(Context *ctx) std::vector<IdString> dead_nets; - bool gnd_used = false; + bool gnd_used = true; // XXX May be needed for simplified IO for (auto &net : ctx->nets) { NetInfo *ni = net.second.get(); @@ -718,8 +718,27 @@ static void pack_io(Context *ctx) } packed_cells.insert(iob->name); } + // what type to create + IdString new_cell_type = id_IOB; + std::string constr_bel_name = std::string(""); + // check whether the given IO is limited to simplified IO cells + auto constr_bel = ci->attrs.find(id_BEL); + if (constr_bel != ci->attrs.end()) { + constr_bel_name = constr_bel->second.as_string(); + } + constr_bel = iob->attrs.find(id_BEL); + if (constr_bel != iob->attrs.end()) { + constr_bel_name = constr_bel->second.as_string(); + } + if (!constr_bel_name.empty()) { + BelId constr_bel = ctx->getBelByNameStr(constr_bel_name); + if (constr_bel != BelId()) { + new_cell_type = ctx->bels[constr_bel].type; + } + } + // Create a IOB buffer - std::unique_ptr<CellInfo> ice_cell = create_generic_cell(ctx, id_IOB, ci->name.str(ctx) + "$iob"); + std::unique_ptr<CellInfo> ice_cell = create_generic_cell(ctx, new_cell_type, ci->name.str(ctx) + "$iob"); gwio_to_iob(ctx, ci, ice_cell.get(), packed_cells); new_cells.push_back(std::move(ice_cell)); auto gwiob = new_cells.back().get(); |