Merge branch 'rr-graph-binary-read-write' into master+wip

Signed-off-by: Alessandro Comodi <[email protected]>

Author: acomodi

vpr/src/route/rr_graph.cpp

@@ -2508,6 +2508,54 @@ static vtr::NdMatrix<std::vector<int>, 4> alloc_and_load_track_to_pin_lookup(vtr
     return track_to_pin_lookup;
 }
 
+/* Writes out data (excludes fasm metadata) about node inode to binary in file fp *
+ * Writes data in the following order: int inode, t_rr_type type, e_direction     *
+ * direction (if CHANX or CHANY), uint16_t capacity, length 5 uint16_t array pos, *
+ * e_side side (if IPIN or OPIN), float R, float C, uint16_t num_edges.Then loops *
+ * through every edge writing out int edge_sink node and uint16_t edge_switch.    */
+void write_rr_node(FILE* fp, const std::vector<t_rr_node>& L_rr_node, int inode) {
+    const auto& rr_node = L_rr_node[inode];
+    t_rr_type type = rr_node.type();
+    uint16_t num_edges = rr_node.num_edges();
+    int edge_sink_node;
+    uint16_t edge_switch;
+    uint16_t capacity = (uint16_t)rr_node.capacity();
+    float R = rr_node.R();
+    float C = rr_node.C();
+    uint16_t pos[5];
+
+    pos[0] = rr_node.xlow();
+    pos[1] = rr_node.ylow();
+    pos[2] = rr_node.xhigh();
+    pos[3] = rr_node.yhigh();
+    pos[4] = rr_node.ptc_num();
+
+    fwrite(&inode, sizeof(inode), 1, fp);
+    fwrite(&type, sizeof(type), 1, fp);
+    if (rr_node.type() == CHANX || rr_node.type() == CHANY) {
+        e_direction direction = rr_node.direction();
+        fwrite(&direction, sizeof(direction), 1, fp);
+    }
+    fwrite(&capacity, sizeof(capacity), 1, fp);
+    fwrite(pos, sizeof(*pos), 5, fp);
+
+    if (rr_node.type() == IPIN || rr_node.type() == OPIN) {
+        e_side side = rr_node.side();
+        fwrite(&side, sizeof(side), 1, fp);
+    }
+
+    fwrite(&R, sizeof(R), 1, fp);
+    fwrite(&C, sizeof(C), 1, fp);
+    fwrite(&num_edges, sizeof(num_edges), 1, fp);
+
+    for (int iedge = 0; iedge < rr_node.num_edges(); ++iedge) {
+        edge_sink_node = rr_node.edge_sink_node(iedge);
+        edge_switch = rr_node.edge_switch(iedge);
+        fwrite(&edge_sink_node, sizeof(edge_sink_node), 1, fp);
+        fwrite(&edge_switch, sizeof(edge_switch), 1, fp);
+    }
+}
+
 std::string describe_rr_node(int inode) {
     auto& device_ctx = g_vpr_ctx.device();
 

vpr/src/route/rr_graph.h

@@ -6,6 +6,9 @@
  * and so are not currently used in commercial architectures. */
 #define INCLUDE_TRACK_BUFFERS false
 
+#define BINARY_MAGIC_NUM 0x42525247
+#define BINARY_FILE_VERSION 1
+
 #include "device_grid.h"
 
 enum e_graph_type {
@@ -47,6 +50,9 @@ void free_rr_graph();
 //Returns a brief one-line summary of an RR node
 std::string describe_rr_node(int inode);
 
+void print_rr_node(FILE* fp, const std::vector<t_rr_node>& L_rr_node, int inode);
+void write_rr_node(FILE* fp, const std::vector<t_rr_node>& L_rr_node, int inode);
+
 void init_fan_in(std::vector<t_rr_node>& L_rr_node, const int num_rr_nodes);
 
 // Sets the spec for the rr_switch based on the arch switch