[vpr][analysis] change report_net_timing format to csv

Author: amin1377

vpr/src/analysis/timing_reports.cpp

@@ -180,75 +180,55 @@ void generate_hold_timing_stats(const std::string& prefix,
     timing_reporter.report_unconstrained_hold(prefix + "report_unconstrained_timing.hold.rpt", *timing_info.hold_analyzer());
 }
 
-void generate_net_timing_report(const std::string& prefix,
-                                const SetupHoldTimingInfo& timing_info,
-                                const AnalysisDelayCalculator& delay_calc) {
-    /* Create a report file for net timing information */
-    std::ofstream os(prefix + "report_net_timing.rpt");
+void generate_net_timing_report_csv(const std::string& prefix,
+                                    const SetupHoldTimingInfo& timing_info,
+                                    const AnalysisDelayCalculator& delay_calc) {
+    std::ofstream os(prefix + "report_net_timing.csv");
     const auto& atom_netlist = g_vpr_ctx.atom().netlist();
     const auto& atom_lookup = g_vpr_ctx.atom().lookup();
-
     const auto& timing_ctx = g_vpr_ctx.timing();
     const auto& timing_graph = timing_ctx.graph;
 
-    os << "# This file is generated by VTR" << std::endl;
-    os << "# Version: " << vtr::VERSION << std::endl;
-    os << "# Revision: " << vtr::VCS_REVISION << std::endl;
-    os << "# For each net, the timing information is reported in the following format:" << std::endl;
-    os << "# netname : Fanout : "
-       << "(bounding_box_xmin,bounding_box_ymin,bounding_box_layermin),(bounding_box_xmax,bounding_box_ymax,bounding_box_layermax) : "
-       << "source_instance <slack_on source pin> : "
-       << "<load pin name1> <slack on load pin name1> <net delay for this net> : "
-       << "<load pin name2> <slack on load pin name2> <net delay for this net> : ..."
-       << std::endl;
-
-    os << std::endl;
+    // Write CSV header
+    os << "netname,Fanout,bb_xmin,bb_ymin,bb_layer_min,"
+       << "bb_xmax,bb_ymax,bb_layer_max,"
+       << "src_pin_name,src_pin_slack,sinks" << std::endl;
 
     for (const auto& net : atom_netlist.nets()) {
-        /* Skip constant nets */
-        if (atom_netlist.net_is_constant(net)) {
-            continue;
-        }
+        if (atom_netlist.net_is_constant(net)) continue;
 
         const auto& net_name = atom_netlist.net_name(net);
-
-        /* Get source pin and its timing information */
         const auto& source_pin = *atom_netlist.net_pins(net).begin();
         auto source_pin_slack = timing_info.setup_pin_slack(source_pin);
-        /* Timing graph node id corresponding to the net's source pin */
         auto tg_source_node = atom_lookup.atom_pin_tnode(source_pin);
         VTR_ASSERT(tg_source_node.is_valid());
 
         const size_t fanout = atom_netlist.net_sinks(net).size();
         const auto& net_bb = get_net_bounding_box(net);
-        os << net_name << " : "
-           << fanout << " : "
-           << "(" << net_bb.xmin << "," << net_bb.ymin << "," << net_bb.layer_min << "),("
-           << net_bb.xmax << "," << net_bb.ymax << "," << net_bb.layer_max << ") : "
-           << atom_netlist.pin_name(source_pin).c_str() << " " << source_pin_slack << " : ";
-
-        /* Iterate over all fanout pins and print their timing information */
-        for (size_t net_pin_index = 1; net_pin_index <= fanout; ++net_pin_index) {
-            const auto& pin = *(atom_netlist.net_pins(net).begin() + net_pin_index);
-
-            /* Get timing graph node id corresponding to the fanout pin */
-            const auto& tg_sink_node = atom_lookup.atom_pin_tnode(pin);
+
+        os << "\"" << net_name << "\"," // netname (quoted for safety)
+           << fanout << ","
+           << net_bb.xmin << "," << net_bb.ymin << "," << net_bb.layer_min << ","
+           << net_bb.xmax << "," << net_bb.ymax << "," << net_bb.layer_max << ","
+           << "\"" << atom_netlist.pin_name(source_pin) << "\"," << source_pin_slack << ",";
+
+        // Write sinks column (quoted, semicolon-delimited, each sink: name,slack,delay)
+        os << "\"";
+        for (size_t i = 0; i < fanout; ++i) {
+            const auto& pin = *(atom_netlist.net_pins(net).begin() + i + 1);
+            auto tg_sink_node = atom_lookup.atom_pin_tnode(pin);
             VTR_ASSERT(tg_sink_node.is_valid());
 
-            /* Get timing graph edge id between atom pins */
-            const auto& tg_edge_id = timing_graph->find_edge(tg_source_node, tg_sink_node);
+            auto tg_edge_id = timing_graph->find_edge(tg_source_node, tg_sink_node);
             VTR_ASSERT(tg_edge_id.is_valid());
 
-            /* Get timing information for the fanout pin */
-            const auto& pin_setup_slack = timing_info.setup_pin_slack(pin);
-            const auto& pin_delay = delay_calc.max_edge_delay(*timing_graph, tg_edge_id);
-
+            auto pin_setup_slack = timing_info.setup_pin_slack(pin);
+            auto pin_delay = delay_calc.max_edge_delay(*timing_graph, tg_edge_id);
             const auto& pin_name = atom_netlist.pin_name(pin);
-            os << pin_name << " " << std::scientific << pin_setup_slack << " " << pin_delay;
-            if (net_pin_index < fanout) {
-                os << " : ";
-            }
+
+            os << pin_name << "," << pin_setup_slack << "," << pin_delay;
+            if (i != fanout - 1) os << ";";
         }
-        os << "," << std::endl;
+        os << "\"" << std::endl; // Close quoted sinks field and finish the row
     }
 }