Support for Custom Properties

[nicolaimueller]

Hi RapidWright Experts,

I would like to define custom properties for certain wires in Verilog like the following:
(* CUSTOM_PROPERTY = "0" *) wire test;

Is it possible to access such custom properties through RapidWright? For example, I would expect functionality similar to this:

design = Design.readCheckpoint(dcp_path, edif_path)
for net in design.getNets():
    property = net.getProperty("CUSTOM_PROPERTY")

If this functionality is not currently supported, would it be feasible to add support for accessing these user-defined attributes in a future version of RapidWright?

Thank you for your time and support.

[clavin-xlnx]

@nicolaimueller - Yes, RapidWright does support netlist properties. In RapidWright, we have a logical netlist view and a physical netlist view. All of the properties you would typically find on Verilog are annotated on the logical netlist which is represented by the EDIFNetlist object. Many of the classes in the com.xilinx.rapidwright.edif correspond to logical netlist elements inherit from an object called EDIFPropertyObject which has its own map of properties. Here is the Object Heirarchy for the [EDIFPropertyObject]:

From your example, you could get the properties of a logical net (from a physical Net) by:

design = Design.readCheckpoint(dcp_path, edif_path)
for net in design.getNets():
    property = net.getLogicalNet().getProperty("CUSTOM_PROPERTY")