You can configure the incremental flow using the config_implementation command. To view the default and current values of
this command use the report_config_implementation
command. To update these values use the config_implementation command. Following is an example:
report_config_implementation
config_implementation { {incr.ignore_user_clock_uncertainty true} }Note: You can update more than one element at a
time by grouping key value pairs in the same method shown above within the outer
brackets.
You can configure the following:
- Minimum thresholds for cell matching, net matching, and WNS in the automatic incremental flow.
- Behavior of both synthesis and implementation when the automatic incremental flow criteria is
not met. This check happens at the beginning of the synthesis run and during
read_checkpoint -incrementalfor implementation. It can be set toTerminatewhich stops the flow orSwitchToDefaultFlowwhich exits the incremental flow but continues with default flow settings. - Whether the flow ignores user clock uncertainty constraints that are typically used to overconstrain the placer and force closer placement.