support rotation on segment groups inside RRChan and improve rotatable mirror searching

vpr7_x2p/vpr/SRC/fpga_x2p/base/fpga_x2p_pbtypes_utils.h

@@ -1,3 +1,6 @@
+#ifndef FPGA_X2P_PBTYPES_UTILS_H
+#define FPGA_X2P_PBTYPES_UTILS_H
+
 void check_pb_graph_edge(t_pb_graph_edge pb_graph_edge);
 
 void check_pb_graph_pin_edges(t_pb_graph_pin pb_graph_pin);
@@ -236,3 +239,5 @@ boolean is_pb_used_for_wiring(t_pb_graph_node* cur_pb_graph_node,
                               t_rr_node* pb_rr_graph);
 
 char* get_pb_graph_full_name_in_hierarchy(t_pb_graph_node* cur_pb_graph_node);
+
+#endif

vpr7_x2p/vpr/SRC/fpga_x2p/base/fpga_x2p_unique_routing.c

@@ -1150,16 +1150,16 @@ RRSwitchBlock rotate_rr_switch_block_for_mirror(DeviceCoordinator& device_range,
 
   /* For BOTTOM SIDE: Y-channel in DEC_DIRECTION, rotate by an offset of its y-coordinator */
   if (device_range.get_y() - 1 > rotated_rr_switch_block.get_y()) {
-    rotated_rr_switch_block.counter_rotate_side_chan_node_by_direction(BOTTOM, DEC_DIRECTION, device_range.get_y() - 1 - rotated_rr_switch_block.get_y());
+    rotated_rr_switch_block.counter_rotate_side_chan_node_by_direction(BOTTOM, DEC_DIRECTION, rotated_rr_switch_block.get_y() - 1);
     /* Rotate the same nodes on the opposite side */
-    rotated_rr_switch_block.counter_rotate_side_chan_node_by_direction(TOP, DEC_DIRECTION, device_range.get_y() - 1 - rotated_rr_switch_block.get_y());
+    rotated_rr_switch_block.counter_rotate_side_chan_node_by_direction(TOP, DEC_DIRECTION, rotated_rr_switch_block.get_y() - 1);
   }
 
   /* For LEFT SIDE: X-channel in DEC_DIRECTION, rotate by an offset of its x-coordinator */
   if (device_range.get_x() - 1 > rotated_rr_switch_block.get_x()) {
-    rotated_rr_switch_block.counter_rotate_side_chan_node_by_direction(LEFT, DEC_DIRECTION, device_range.get_x() - 1 - rotated_rr_switch_block.get_x());
+    rotated_rr_switch_block.counter_rotate_side_chan_node_by_direction(LEFT, DEC_DIRECTION, rotated_rr_switch_block.get_x() - 1);
     /* Rotate the same nodes on the opposite side */
-    rotated_rr_switch_block.counter_rotate_side_chan_node_by_direction(RIGHT, DEC_DIRECTION, device_range.get_x() - 1 - rotated_rr_switch_block.get_x());
+    rotated_rr_switch_block.counter_rotate_side_chan_node_by_direction(RIGHT, DEC_DIRECTION, rotated_rr_switch_block.get_x() - 1);
   }
 
   return rotated_rr_switch_block;

vpr7_x2p/vpr/SRC/fpga_x2p/base/rr_blocks.cpp

@@ -101,6 +101,26 @@ bool RRChan::is_mirror(RRChan& cand) const {
   return true;
 }
 
+/* Get a list of segments used in this routing channel */
+std::vector<size_t> RRChan::get_segment_ids() const { 
+  std::vector<size_t> seg_list;
+
+  /* make sure a clean start */
+  seg_list.clear();
+
+  /* Traverse node_segments */
+  for (size_t inode = 0; inode < get_chan_width(); ++inode) {
+    std::vector<size_t>::iterator it;
+    /* Try to find the node_segment id in the list */
+    it = find(seg_list.begin(), seg_list.end(), node_segments_[inode]);
+    if ( it != seg_list.end() ) {
+      /* Not found, add it to the list */
+      seg_list.push_back(node_segments_[inode]);
+    }
+  }
+
+  return seg_list;
+}
 
 /* Mutators */
 void RRChan::set(const RRChan& rr_chan) {
@@ -166,7 +186,7 @@ void RRChan::rotate(size_t rotate_begin, size_t rotate_end, size_t offset) {
 
 /* rotate all the channel nodes by a given offset:
  * Routing Channel nodes are divided into different groups using segment ids
- * each group is rotated separatedly
+ * each group should be rotated separatedly
  */
 void RRChan::rotate_by_node_direction(enum e_direction node_direction, size_t offset) {
   /* skip if there are no nodes */
@@ -174,11 +194,16 @@ void RRChan::rotate_by_node_direction(enum e_direction node_direction, size_t of
     return;
   }
 
+  /* get a list of segment_ids existing in the routing channel */
+  std::vector<size_t> seg_ids = get_segment_ids();
+
+  for (size_t iseg = 0; iseg < seg_ids.size(); ++iseg) {
     /* Get the channel nodes of a given direction */
     std::vector<t_rr_node*> nodes;
     std::vector<size_t> node_segments;
     for (size_t inode = 0; inode < get_chan_width(); ++inode) {
-    if (node_direction == get_node(inode)->direction) {
+      if ( (node_direction == get_node(inode)->direction) 
+        && (seg_ids[iseg] == get_node_segment(inode)) ) {
         nodes.push_back(get_node(inode));
         node_segments.push_back(get_node_segment(inode));
       }
@@ -193,7 +218,8 @@ void RRChan::rotate_by_node_direction(enum e_direction node_direction, size_t of
   
     /* back-annotate to to the original chan nodes*/
     for (size_t inode = 0; inode < get_chan_width(); ++inode) {
-    if (node_direction == get_node(inode)->direction) {
+      if ( (node_direction == get_node(inode)->direction) 
+        && (seg_ids[iseg] == get_node_segment(inode)) ) {
         nodes_[inode] = nodes.front();
         node_segments_[inode] = node_segments.front();
         /* pop up temp vectors */
@@ -205,6 +231,7 @@ void RRChan::rotate_by_node_direction(enum e_direction node_direction, size_t of
     /* Make sure temp vectors are all poped out */
     assert ( 0 == nodes.size());
     assert ( 0 == node_segments.size());
+  }
 
   return;
 } 
@@ -219,11 +246,16 @@ void RRChan::counter_rotate_by_node_direction(enum e_direction node_direction, s
     return;
   }
 
+  /* get a list of segment_ids existing in the routing channel */
+  std::vector<size_t> seg_ids = get_segment_ids();
+
+  for (size_t iseg = 0; iseg < seg_ids.size(); ++iseg) {
     /* Get the channel nodes of a given direction */
     std::vector<t_rr_node*> nodes;
     std::vector<size_t> node_segments;
     for (size_t inode = 0; inode < get_chan_width(); ++inode) {
-    if (node_direction == get_node(inode)->direction) {
+      if ( (node_direction == get_node(inode)->direction) 
+        && (seg_ids[iseg] == get_node_segment(inode)) ) {
         nodes.push_back(get_node(inode));
         node_segments.push_back(get_node_segment(inode));
       }
@@ -238,7 +270,8 @@ void RRChan::counter_rotate_by_node_direction(enum e_direction node_direction, s
 
     /* back-annotate to to the original chan nodes*/
     for (size_t inode = 0; inode < get_chan_width(); ++inode) {
-    if (node_direction == get_node(inode)->direction) {
+      if ( (node_direction == get_node(inode)->direction) 
+        && (seg_ids[iseg] == get_node_segment(inode)) ) {
         nodes_[inode] = nodes.front();
         node_segments_[inode] = node_segments.front();
         /* pop up temp vectors */
@@ -250,6 +283,7 @@ void RRChan::counter_rotate_by_node_direction(enum e_direction node_direction, s
     /* Make sure temp vectors are all poped out */
     assert ( 0 == nodes.size());
     assert ( 0 == node_segments.size());
+  }
 
   return;
 } 
@@ -1763,6 +1797,9 @@ void DeviceRRSwitchBlock::add_rr_switch_block(DeviceCoordinator& coordinator,
 
 /* Add a switch block to the array, which will automatically identify and update the lists of unique mirrors and rotatable mirrors */
 void DeviceRRSwitchBlock::build_unique_mirror() {
+  /* Make sure a clean start */
+  clear_mirror();
+
   for (size_t ix = 0; ix < rr_switch_block_.size(); ++ix) {
     for (size_t iy = 0; iy < rr_switch_block_[ix].size(); ++iy) {
       bool is_unique_mirror = true;
@@ -1830,15 +1867,34 @@ void DeviceRRSwitchBlock::clear() {
   /* clean rr_switch_block array */
   for (size_t x = 0; x < rr_switch_block_.size(); ++x) {
     rr_switch_block_[x].clear(); 
+    rr_switch_block_mirror_id_[x].clear(); 
+    rr_switch_block_rotatable_mirror_id_[x].clear(); 
   }
   rr_switch_block_.clear();
+  rr_switch_block_mirror_id_.clear();
+  rr_switch_block_rotatable_mirror_id_.clear();
 
+  /* clean unique mirror */
+  clear_mirror();
+
+  /* clean unique mirror */
+  clear_rotatable_mirror();
+
+  return;
+}
+
+/* clean the content related to unique_mirrors */
+void DeviceRRSwitchBlock::clear_mirror() {
   /* clean unique mirror */
   unique_mirror_.clear();
 
+  return;
+} 
+
+/* clean the content related to rotatable_mirrors */
+void DeviceRRSwitchBlock::clear_rotatable_mirror() {
   /* clean unique mirror */
   rotatable_mirror_.clear();
-
   return;
 } 
 

vpr7_x2p/vpr/SRC/fpga_x2p/base/rr_blocks.h

@@ -47,6 +47,7 @@ class RRChan {
     int get_node_segment(t_rr_node* node) const;
     int get_node_segment(size_t track_num) const;
     bool is_mirror(RRChan& cand) const; /* evaluate if two RR_chan is mirror to each other */
+    std::vector<size_t> get_segment_ids() const; /* Get a list of segments used in this routing channel */
   public: /* Mutators */
     void set(const RRChan&); /* copy */
     void set_type(t_rr_type type); /* modify type */
@@ -253,6 +254,8 @@ class DeviceRRSwitchBlock {
     void build_unique_mirror(); /* Add a switch block to the array, which will automatically identify and update the lists of unique mirrors and rotatable mirrors */
     void add_rotatable_mirror(DeviceCoordinator& coordinator, RRSwitchBlock& rr_sb); /* Add a switch block to the array, which will automatically identify and update the lists of unique mirrors and rotatable mirrors */
     void clear(); /* clean the content */
+    void clear_mirror(); /* clean the content */
+    void clear_rotatable_mirror(); /* clean the content */
   private: /* Validators */
     bool validate_coordinator(DeviceCoordinator& coordinator) const; /* Validate if the (x,y) is the range of this device */
     bool validate_unique_mirror_index(size_t index) const; /* Validate if the index in the range of unique_mirror vector*/