The following options are available when using the
read_checkpoint -incremental command.
This enables the automatic incremental flow described in Automatic Incremental.
-fix_objects <cell objects>
-fix_objects option can be used to lock a
subset of cells. These cells are not touched by the incremental place and route
-fix_objects option only works on cells
that match and are identified for cell reuse.
The following are examples of the
- To reuse all objects and fix only Block Memory
read_checkpoint -incremental routed.dcp -fix_objects [all_rams]
- To reuse all objects and fix only DSP
read_checkpoint -incremental routed.dcp -fix_objects [all_dsps]
-force_incr option can be used to force
the incremental implementation flow irrespective of the incremental criteria checks.
When not specified the incremental implementation flow might exit and continue in
non-incremental or default flow.
This option can be used instead of modifying the incremental implementation configurations values to update the minimum thresholds for cell matching, net matching, and WNS in the automatic incremental flow.
-force_incris only used along with the -incremental switch.