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 RC: to Remove PG pins from a Netlist.. 

Last post Tue, Oct 23 2012 7:39 AM by bmiller. 1 replies.
Started by Yemelya 22 Oct 2012 10:57 AM. Topic has 1 replies and 872 views
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  • Mon, Oct 22 2012 10:57 AM

    • Yemelya
    • Top 150 Contributor
    • Joined on Tue, Feb 16 2010
    • Posts 60
    • Points 870
    RC: to Remove PG pins from a Netlist.. Reply

    Hello,


    There are several Power/Ground pins in the RTL design (and they cross many hierarchies). Given that they require special route in Encounter, to define them as pgpins, this pins have to be removed from the netlist. 

    During the synthesis, I tried to use “rm” or “set_atrribute ... pgpin”   - unsuccessfully. I believe it’s possible to remove them from the netlist by adding “pragma” to the RTL files, but since it’s an IP I don’t want to touch the RTL. 


    So, my question is how Pins and Nets could be removed from the Netlist during RC synthesis, if it's possible?

    Thanks… Boris.

     

    • Post Points: 20
  • Tue, Oct 23 2012 7:39 AM

    • bmiller
    • Top 200 Contributor
    • Joined on Tue, Oct 14 2008
    • Ottawa, Ontario
    • Posts 42
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    Re: RC: to Remove PG pins from a Netlist.. Reply

     To remove a port, you need to remove the "port_bus" object.

     

    rc:/> find / -port my_bidir_port                
    /designs/mydesign/ports_in/my_bidir_port /designs/mydesign/ports_out/my_bidir_port
    rc:/> find / -port_bus my_bidir_port
    /designs/mydesign/port_busses_in/my_bidir_port /designs/mydesign/port_busses_out/my_bidir_port
    rc:/> rm [find / -port_bus my_bidir_port]
    rc:/> find / -port my_bidir_port        
    rc:/>

     

    I hope this helps!

     

     

    • Post Points: 5
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Started by Yemelya at 22 Oct 2012 10:57 AM. Topic has 1 replies.