[DC] Add scripts to automate the synthesis for local encoders

SNPS_DC/SCRIPTS/dc_template.tcl

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+##########################################################
+# Template scripts to synthesize a combinational circuit 
+# using Design Compiler
+# Author:       Xifan Tang
+# Organization: University of Utah
+# Date:         September 4th, 2020
+##########################################################
+
+# Variable declaration
+set CTRITICAL_PATH 1; # [ns]
+
+# Make sure a clean start
+remove_design -all
+
+set DB_FILE "/research/ece/lnis/CAD_TOOLS/DKITS/skywater/skywater-pdk/vendor/synopsys/results/lib/sky130_fd_sc_hd/db_nldm/sky130_fd_sc_hd__tt_025C_1v80.db"
+
+# Read standard cell library
+# Here we consider the Skywater 130nm High Density(HD) cell library
+read_db ${DB_FILE}
+set target_library ${DB_FILE}
+set link_library ${DB_FILE}
+
+set DESIGN_NAME DESIGN_NAME_VAR
+set RTL_NETLIST RTL_NETLIST_VAR
+
+# Parse the HDL
+analyze -f verilog ${RTL_NETLIST}
+elaborate ${DESIGN_NAME}
+
+# Set constraints
+# Push to 0 for the minimum area
+set_max_area 0
+
+# Link to technology library and start compilation
+link
+compile -map_effort high
+
+# Output netlist
+write -format Verilog -output ../GATE_NETLISTS/${DESIGN_NAME}_post_synth.v
+
+# Report results
+report_unit > ../RPT/${DESIGN_NAME}_unit.rpt
+report_area > ../RPT/${DESIGN_NAME}_area.rpt
+report_timing > ../RPT/${DESIGN_NAME}_timing.rpt
+report_power > ../RPT/${DESIGN_NAME}_power.rpt
+report_reference > ../RPT/${DESIGN_NAME}_reference.rpt
+
+# Finish here
+exit
+
+

SNPS_DC/SCRIPTS/run_dc_synth.py

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+#####################################################################
+# Python script to execute Design Compiler Synthesis for a given template tcl script
+# This script will
+# - Create the tcl script as synthesis recipe
+# - Run Design Compiler
+# - Analyze output log files and return succeed or failure
+#####################################################################
+
+import sys
+import os
+from os.path import dirname, abspath, isfile
+import shutil
+import re
+import argparse
+import logging
+import subprocess
+
+#####################################################################
+# Initialize logger
+#####################################################################
+logging.basicConfig(format='%(levelname)s: %(message)s', level=logging.INFO)
+#####################################################################
+# Main function of this script, so that it can be called by other scripts
+#####################################################################
+def main(args):
+  #####################################################################
+  # Parse the options
+  #####################################################################
+  parser = argparse.ArgumentParser(description='Run Synopsys Design Compiler Synthesis for an input netlist')
+  parser.add_argument('--rtl_netlist', required=True,
+                      help='Specify the file path to the RTL netlist as input')
+  parser.add_argument('--recipe_template', required=True,
+                      help='Specify the file path to tcl script contain template synthesis recipe')
+  parser.add_argument('--technology_library', required=True,
+                      help='Specify the technology library which the RTL netlist will be mapped to')
+  parser.add_argument('--project_workspace', required=True,
+                      help='Specify the directory to run Design Compiler')
+  args = parser.parse_args(args)
+
+  run_dc_batch_synth(args.rtl_netlist, args.recipe_template, args.technology_library, args.project_workspace)
+
+#####################################################################
+# A function to execute a single-run of Design Compiler for a RTL design
+#####################################################################
+def run_dc_synth(rtl_netlist, rtl_design_name, recipe_template, technology_library, project_workspace):
+  project_abs_path = os.path.abspath(project_workspace)
+  if not os.path.isdir(project_abs_path):
+    logging.debug("Creating Design Compiler project directory : " + project_abs_path + " ...\n")
+    os.makedirs(project_abs_path, exist_ok=True)
+    logging.debug("Done\n")
+
+  #####################################################################
+  # Create the Tcl script for Design Compiler
+  #####################################################################
+  # Get absolute path to the template tcl script, it must be valid
+  template_tcl_path = os.path.abspath(recipe_template)
+  assert(isfile(template_tcl_path))
+  
+  # Create output file handler
+  tcl_file_path = project_abs_path + "/" + os.path.basename(rtl_design_name) + "_dc.tcl"
+  logging.debug("Generating Tcl script from template recipe: " + tcl_file_path)
+
+  tcl_file = open(tcl_file_path, "w")
+
+  with open(template_tcl_path, "r") as wp:
+    template_tcl_file = wp.readlines()
+    for line_num, curr_line in enumerate(template_tcl_file):
+      line2output = curr_line 
+      # Replace keywords with custom values
+      line2output = re.sub("TECH_DB_VAR", technology_library, curr_line)
+      line2output = re.sub("DESIGN_NAME_VAR", rtl_design_name, curr_line)
+      line2output = re.sub("RTL_NETLIST_VAR", rtl_netlist, curr_line)
+      # Finished processing
+      # Output the line
+      tcl_file.write(line2output)
+  
+  tcl_file.close()
+  logging.debug("Done")
+  
+  #####################################################################
+  # Run Design Compiler
+  #####################################################################
+  curr_dir = os.getcwd()
+  # Change to the project directory
+  os.chdir(project_abs_path)
+  logging.debug("Changed to directory: " + project_abs_path)
+  
+  # Run Design Compiler
+  dc_log_file_path = project_abs_path + "/" + os.path.basename(rtl_design_name) + "_dc.log"
+  dc_shell_bin = "dc_shell"
+  dc_shell_cmd = dc_shell_bin + " -f " + os.path.abspath(tcl_file_path) + " > " + dc_log_file_path
+  logging.debug("Running Design Compiler by : " + dc_shell_cmd)
+  subprocess.run(dc_shell_cmd, shell=True, check=True)
+  
+  # Go back to current directory
+  os.chdir(curr_dir)
+
+#####################################################################
+# Main function of this script, so that it can be called by other scripts
+#####################################################################
+def run_dc_batch_synth(rtl_netlist, recipe_template, technology_library, project_workspace):
+  #####################################################################
+  # Check options:
+  # - Input files must be valid
+  #   Otherwise, error out
+  #####################################################################
+  if not isfile(rtl_netlist):
+    logging.error("Invalid RTL netlist: " + rtr_netlist + "\nFile does not exist!\n")
+    exit(1)
+
+  if not isfile(recipe_template):
+    logging.error("Invalid recipe template: " + recipe_template + "\nFile does not exist!\n")
+    exit(1)
+
+  if not isfile(technology_library):
+    logging.error("Invalid technology library: " + technology_library + "\nFile does not exist!\n")
+    exit(1)
+
+  #####################################################################
+  # Collect all the RTL designs to synthesis from the RTL netlist
+  #####################################################################
+  rtl_design_names = []
+  with open(rtl_netlist, "r") as wp:
+    rtl_file = wp.readlines()
+    # If a line starts with 'module', it is an RTL design to be synthesized
+    for line_num, curr_line in enumerate(rtl_file):
+      if (curr_line.startswith("module")):
+        # Get the design name
+        rtl_design_name = re.findall("module(\s+)(\w+)\(", curr_line)[0][1]
+        rtl_design_names.append(rtl_design_name)
+
+  logging.info("Found " + str(len(rtl_design_names)) + " RTL designs to synthesize")
+
+  # Get absolute path to the template tcl script, it must be valid
+  rtl_netlist_abs_path = os.path.abspath(rtl_netlist)
+  assert(isfile(rtl_netlist_abs_path))
+
+  for rtl_design_name in rtl_design_names:
+    logging.info("Running Design Compiler for design: " + rtl_design_name)
+    run_dc_synth(rtl_netlist_abs_path, rtl_design_name, recipe_template, technology_library, project_workspace)
+    logging.info("Done")
+
+if __name__ == "__main__":
+  main(sys.argv[1:])

SNPS_DC/synth_local_encoders.sh

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+python3 SCRIPTS/run_dc_synth.py --rtl_netlist ../HDL/k4_N8_reset_softadder_caravel_io_FPGA_12x12_customhd_cc/SRC/sub_module/local_encoder.v --recipe_template SCRIPTS/dc_template.tcl --technology_library ../PDK/skywater-pdk/vendor/synopsys/results/lib/sky130_fd_sc_hd/db_nldm/sky130_fd_sc_hd__tt_025C_1v80.db --project_workspace ./TEMP