The PSIP_RETIMING_BACKWARD attribute instructs the tool to move a
register from the output of a gate and creates new registers at the inputs of the
same gate. Applying this attribute on a cell instructs the PSIP engine (Physical
Synthesis in Placer, a sub phase in placer optimization) to perform retiming.
- Architecture Support
-
All architectures.
- Applicable Objects
-
Cells (
get_cells). - Values
-
- True (or 1): The Vivado PSIP engine performs backward retiming.
- False (or 0): The Vivado PSIP engine does not perform backward retiming.
Affected Steps
- Place Design