opensta

OpenSTA Tool Interface.

Provides an interface to run OpenSTA for static timing analysis on a given Verilog netlist.

Classes

OpenStaTool

OpenSTA is an open-source static timing analysis tool.

Module Contents

OpenStaTool

class OpenStaTool(sta_executable, liberty_files=None, top_name=None, verilog_netlist=None, spef_files=None, debug=False)[source]

Bases: StaTool

OpenSTA is an open-source static timing analysis tool.

Initializes the OpenSTATool with the given parameters.

This class provides an interface to run OpenSTA on a given netlist, and to retrieve the generated SDF file after analysis.

Parameters:

  • sta_executable (Path | str) – The path to the OpenSTA executable.

  • liberty_files (list[Path] | Path | None) – The Liberty timing model file(s) to use for analysis. Can be a single Path or a list of Paths.

  • top_name (str | None) – The name of the top-level design to analyze.

  • verilog_netlist (Path | None) – The path to the Verilog gate-level netlist to analyze. If None, it must be set before calling analyze().

  • spef_files (list[Path] | Path | None) – The SPEF RC extraction file(s) to use for analysis. Can be a single Path or a list of Paths.

  • debug (bool) – Flag to enable debug mode, which will print additional information during analysis. Default is False.

Properties

property sta_design_name: str[source]

Return the name of the design being analyzed.

property sta_liberty_files: list[Path] | Path | None[source]

Return the list of Liberty files used for STA analysis.

property sta_netlist_file: Path[source]

Return the path to the netlist file used for STA analysis.

property sta_rc_files: list[Path] | Path | None[source]

Return the list of RC files used for STA analysis.

property sta_sdf_file: Path[source]

Return the path to the generated SDF file after analysis.

Raises:

RuntimeError – If the SDF file has not been generated yet.

Methods

sta_analyze() → None[source]

Generate an temporary SDF file from the Verilog gate-level netlist.

Uses OpenSTA. The SDF file is created in a temporary location and deleted after use.

Raises:

RuntimeError – If the SDF file cannot be generated or is empty after running OpenSTA.

sta_clean_up() → None[source]

Clean up any temporary files generated during STA analysis.

This includes the SDF file.