[syn] Synth flow improvements

Adds significant functionality to synthesis flow. Timing reports are
generated using OpenSTA and an area report is generated. Flow supports
open Nangate45 library from OpenROAD.

syn/python/translate_timing_csv.py

@@ -0,0 +1,41 @@
+#!/usr/bin/python3
+
+# Copyright lowRISC contributors.
+# Licensed under the Apache License, Version 2.0, see LICENSE for details.
+# SPDX-License-Identifier: Apache-2.0
+
+import argparse
+
+from flow_utils import *
+
+
+def main():
+    arg_parser = argparse.ArgumentParser(
+        description=
+        """Translates CSV timing report to have human readable start and end
+        points given yosys generated name translation file (generated with
+        build_translated_names.py""")
+
+    arg_parser.add_argument('rpt_file', help='Name of the CSV report file')
+    arg_parser.add_argument(
+        'gen_out', help='Path containing generated name translation file')
+
+    args = arg_parser.parse_args()
+
+    (cells_to_translate, path_info) = extract_path_info(args.rpt_file)
+
+    path_info = translate_path_info(
+        path_info, '{}/{}'.format(args.gen_out, ys_translated_names))
+
+    translated_rpt_out = open(sys.argv[1], 'w')
+
+    translated_rpt_out.write('Start Point, End Point, WNS (ns)\n')
+
+    for p in path_info:
+        translated_rpt_out.write('{},{},{}\n'.format(p[0], p[1], p[2]))
+
+    translated_rpt_out.close()
+
+
+if __name__ == "__main__":
+    main()