Merge pull request #2378 from verilog-to-routing/tileable_rr_graph_write

Added Optional Attribute to RRGraph

Author: vaughnbetz

libs/librrgraph/src/base/rr_graph_builder.cpp

@@ -29,8 +29,12 @@ void RRGraphBuilder::add_node_to_all_locs(RRNodeId node) {
     t_rr_type node_type = node_storage_.node_type(node);
     short node_ptc_num = node_storage_.node_ptc_num(node);
     short node_layer = node_storage_.node_layer(node);
+    short node_twist = node_storage_.node_ptc_twist(node);
+    int node_offset = 0;
     for (int ix = node_storage_.node_xlow(node); ix <= node_storage_.node_xhigh(node); ix++) {
         for (int iy = node_storage_.node_ylow(node); iy <= node_storage_.node_yhigh(node); iy++) {
+            node_ptc_num += node_twist * node_offset;
+            node_offset++;
             switch (node_type) {
                 case SOURCE:
                 case SINK:

libs/librrgraph/src/base/rr_graph_builder.h

@@ -193,6 +193,12 @@ class RRGraphBuilder {
         node_storage_.set_node_layer(id, layer);
     }
 
+    /** @brief set the ptc twist increment number for TILEABLE rr graphs (for more information see rr_graph_storage.h twist increment comment) */
+    inline void set_node_ptc_twist_incr(RRNodeId id, int twist){
+        node_storage_.set_node_ptc_twist_incr(id, twist);
+    }
+
+
     /** @brief set_node_pin_num() is designed for logic blocks, which are IPIN and OPIN nodes */
     inline void set_node_pin_num(RRNodeId id, int new_pin_num) {
         node_storage_.set_node_pin_num(id, new_pin_num);
@@ -295,6 +301,12 @@ class RRGraphBuilder {
     inline void resize_nodes(size_t size) {
         node_storage_.resize(size);
     }
+
+    /** @brief This function resize node ptc twist increment; Since it is only used for tileable rr-graph, we don't put it in general resize function*/
+    inline void resize_ptc_twist_incr(size_t size){
+        node_storage_.resize(size);
+    }
+
     /** @brief This function resize rr_switch to accomidate size RR Switch. */
     inline void resize_switches(size_t size) {
         rr_switch_inf_.resize(size);

libs/librrgraph/src/base/rr_graph_storage.cpp

@@ -622,6 +622,11 @@ void t_rr_graph_storage::set_node_layer(RRNodeId id, short layer) {
     node_layer_[id] = layer;
 }
 
+void t_rr_graph_storage::set_node_ptc_twist_incr(RRNodeId id, short twist_incr){
+    VTR_ASSERT(!node_ptc_twist_incr_.empty());
+    node_ptc_twist_incr_[id] = twist_incr;
+}
+
 void t_rr_graph_storage::set_node_ptc_num(RRNodeId id, int new_ptc_num) {
     node_ptc_[id].ptc_.pin_num = new_ptc_num; //TODO: eventually remove
 }
@@ -785,6 +790,7 @@ t_rr_graph_view t_rr_graph_storage::view() const {
         vtr::make_const_array_view_id(node_first_edge_),
         vtr::make_const_array_view_id(node_fan_in_),
         vtr::make_const_array_view_id(node_layer_),
+        vtr::make_const_array_view_id(node_ptc_twist_incr_),
         vtr::make_const_array_view_id(edge_src_node_),
         vtr::make_const_array_view_id(edge_dest_node_),
         vtr::make_const_array_view_id(edge_switch_));