2 files changed, 28 insertions, 0 deletions
diff --git a/common/design_utils.cc b/common/design_utils.cc
index 9478afb2..7f339bac 100644
--- a/common/design_utils.cc
+++ b/common/design_utils.cc
@@ -164,4 +164,26 @@ void rename_net(Context *ctx, NetInfo *net, IdString new_name)
     net->name = new_name;
 }
 
+std::vector<NetInfo *> create_bus(Context *ctx, IdString base_name, const std::string &postfix, int width)
+{
+    std::vector<NetInfo *> nets;
+    for (int i = 0; i < width; i++)
+        nets.push_back(ctx->createNet(ctx->id(stringf("%s/%s[%d]", base_name.c_str(ctx), postfix.c_str(), i))));
+    return nets;
+}
+
+void connect_bus(Context *ctx, CellInfo *cell, IdString port, std::vector<NetInfo *> &bus, PortType dir)
+{
+    for (int i = 0; i < int(bus.size()); i++) {
+        IdString p = ctx->id(stringf("%s%d", port.c_str(ctx), i));
+        if (!cell->ports.count(p)) {
+            cell->ports[p].name = p;
+            cell->ports[p].type = dir;
+        } else {
+            NPNR_ASSERT(cell->ports.at(p).type == dir);
+        }
+        connect_port(ctx, bus.at(i), cell, p);
+    }
+}
+
 NEXTPNR_NAMESPACE_END
diff --git a/common/design_utils.h b/common/design_utils.h
index 301547c6..3a2245a7 100644
--- a/common/design_utils.h
+++ b/common/design_utils.h
@@ -104,6 +104,12 @@ void rename_port(Context *ctx, CellInfo *cell, IdString old_name, IdString new_n
 // Rename a net without invalidating pointers to it
 void rename_net(Context *ctx, NetInfo *net, IdString new_name);
 
+// Create a bus of nets
+std::vector<NetInfo *> create_bus(Context *ctx, IdString base_name, const std::string &postfix, int width);
+
+// Connect a bus of nets to a bus of ports
+void connect_bus(Context *ctx, CellInfo *cell, IdString port, std::vector<NetInfo *> &bus, PortType dir);
+
 void print_utilisation(const Context *ctx);
 
 NEXTPNR_NAMESPACE_END