OpenSTA Timing Analyzer Release Notes ------------------------------------- This file summarizes user visible changes for each release. Release 2.7.0 2025/05/19 ------------------------- The OpenSTA library `libOpenSTA` and `sta` executable are now built in the build directory instead of `app/`. Release 2.6.1 2025/03/30 ------------------------- The -list_annotated and -list_not_annotated arguments to the report_annotated_delay and report_annotated_check commands have been renamed to -report_annotated and -report_unannotated. The Tcl "source" command is no longer redefined to support "-echo" and "-verbose" arguments and redirecton. Use the "include" command instead. include [-echo] [-verbose] filename [> filename] [>> filename] -echo echos commands as they are read -verbose prints command results as they are evaluated Unlike the Tcl source command, "include" expands filenames with tilda '~' and respects sta_continue_on_error. Release 2.6.0 2024/07/22 ------------------------- The version of c++ used by OpenSTA is now 17. The Cudd BBD packager is now required. The USE_TCL_READLINE option defaults to ON. The variable link_make_black_boxes has been removed. Use the -no_black_boxes option to the link_design command. link_design [-no_black_blocks] [top_cell_name] The all_inputs command now supports -no_clocks to remove clocks inputs from the returned list. all_inputs [-no_clocks] The read_power_activities command has been deprecated. Use read_vcd instead. read_vcd [-scope scope] filename The Switching Activity Interchange Format (SAIF) for reading power activities is now supported by the the read_saif command. read_saif [-scope scope] filename The report_checks -group_count option has been renamed to -group_path_count. The report_checks -endpoint_count option has been renamed to -endpoint_path_count. The report_checks -field hierarchical_pins field reports hierarchical pins between a driver and a load in the path report. The suppress_msg and unsuppress_msg commands allow suppression/unsuppression of warnings/errors by ID. Message IDs can be found in doc/messages.txt. Release 2.5.0 2024/01/17 ------------------------- The report_net -connections, -verbose and -hier_pins flags are deprecated. The report_instance -connections and -verbose flags are deprecated. The options are now enabled in all cases. The read_spef parasitic reduction arguments have changed. The -reduce_to and -delete_after_reduce arguments are deprecated and replaced with the -reduce flag. With the -reduce flag, the current delay calculator reduces the parastic network to the appropriate type and deletes the parasitic network. The report_clock_skew and report_clock_latency commands now supports the -include_internal_latency flag to control inclusion of macro internal clock delays from the cell liberty min/max_clock_tree_path timing groups. report_clock_skew -include_internal_latency report_clock_latency -include_internal_latency The all_inputs command now supports the -no_clocks argument to exclude clocks from the list. all_inputs [-no_clocks] The report_activity_annotation command reports power activity annotaton from vcd, saif or the set_input_activity command. report_activity_annotation [-report_unannotated] [-report_annotated] Release 2.4.0 2023/01/19 ------------------------- The report_parasitics_annotation command reports SPEF annotation completeness. report_parasitics_annotation [-report_unannotated] The read_power_activities command reads a verilog vcd file and extracts pin activities for power analysis. read_power_activities -vcd filename The report_cell command has been removed; use report_instance. The read_liberty command latch inference (see OpenSTA.pdf) is now disabled by default. The -no_latch_infer flag is deprecated. To enable latch inference, use the -infer_latches flag. The report fanout and capacitance fields are now shown on output pin lines rather than net lines. Release 2.3.3 2022/09/24 ------------------------- TCL readline support added. See README.md for build instructions. Release 2.3.2 2022/07/03 ------------------------- The liberty default_wire_load is now ignored. You must explicitly set the wire load model with the set_wire_load_model command to apply wire load model based parasitics. Release 2.3.1 2020/11/08 ------------------------- The read_sdf command no longer supports the -analysis_type, -type, -min_type, and -max_type arguments. Use the set_operating_conditions -analysis_type command to set the analysis type before read_sdf. Release 2.2.0 2020/07/18 ------------------------- The report_units reports the current units used by commands. report_units The report_check_types -min_fanout -max_fanout -max_capacitance -min_capacitance report_check_types [-min_fanout] [-max_fanout] [-max_capacitance] [-min_capacitance] The insert_buffer command is no longer supported. Release 2.0.0 2018/09/28 ------------------------- The command line options have changed to the following: -help show help and exit -version show version and exit -no_init do not read .sta init file -threads count|max use count threads -no_splash do not show the license splash at startup -exit exit after reading cmd_file cmd_file source cmd_file .... Builds using Autotools/configure are no longer supported. Use CMake as documented in README.md. .... The check_timing command -no_output_delay checks output ports for set_output_delay. .... The report_power command reports the power consumption of the design or a specific instance. report_power [-instances inst] [-digits digits] [> filename] [>> filename] The internal, switching, leakage and total power are reported. Design power is reported separately for combinational, sequential, macro and pad groups. Use -instances to report power for a specific instance. Use the set_power_activity command to specify activity/duty globally using -global, the input port default using -input, or for input ports using -input_ports, or pins using -pins. set_power_activity [-global] [-input] [-input_ports ports] [-pins pins] [-activiity activity] [-duty duty] .... The write_path_spice command writes a spice netlist for a timing path. write_path_spice -path_args path_args -spice_directory spice_directory -subckt_file subckt_file -lib_subckt_file lib_subckts_file\ -model_file model_file -power power -ground ground Use path_args to specify -from/-through/-to as arguments to the find_timing_paths command. For each path, a spice netlist and the subckts referenced by the path are written in spice_directory. The spice netlist is written in path_.sp and subckt file is path_.subckt. Spice netlists for liberty library cells are read from lib_subckts_file. The spice netlists used by the path are written to subckt_file, which spice_file .includes. The device models used by the spice subckt netlists in model_file are .included in spice_file. Power and ground names are specified with the -power and -ground arguments. The spice netlist includes a piecewise linear voltage source at the input and .measure statement for each gate delay and pin slew. .... The report_checks and report_check_types commands now support an -unconstrained flag. report_checks -unconstrained report_check_types -unconstrained The sta_report_unconstrained_paths variable will be supported for for compatibility in the current release. .... The transition_time path reporting field has been renamed to slew. report_checks -fields {slew} report_check_types -fields {slew} ... The read_parasitics command has been renamed read_spef and no longer supports the SPF format. .... The make_instance command now takes a single instance name argument and returns the instance. make_instance instance_name The make_net command now takes a single net name argument and returns the net. make_net net_name The delete_instance command deletes a single instance instead of a list of instances. delete_instance instance The delete_net command deletes a single net instead of a list of nets. delete_net net The disconnect_pins command is renamed disconnect_pin and disconnects a single pin. disconnect_pin net pin The report_tns and report_wns commands print the value returned by total_negative_slack and worst_negative_slack respectively. report_tns report_wns report_worst_slack The set_clock_sense command was deprecated by SDC 2.1. Use set_sense -type clock instead. # Local Variables: # mode:text # End: