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regarding non default rule of nets and wires

jaya sree

Hai everyone,

In my project ,

when i run below command , i see that all nets have either "Track2X_Wide1X_Metal_0 non default rule" or default rule

selectInstByCellName ckbfxss*

dbGet selected.instTerms.net.rule.name

　

However when i run below command i see other non default rules also. "SNPS_DefGenNDR_3 SNPS_DefGenNDR_8 Track2X_Wide1X_Metal_0 SNPS_DefGenNDR_7 SNPS_DefGenNDR_9 SNPS_DefGenNDR_1 SNPS_DefGenNDR_10 SNPS_DefGenNDR_4 SNPS_DefGenNDR_2 SNPS_DefGenNDR_5 SNPS_DefGenNDR_6 SNPS_DefGenNDR_12 SNPS_DefGenNDR_11 SNPS_DefGenNDR_13 SNPS_DefGenNDR_14"

selectInstByCellName ckbfxss*

dbGet selected.instTerms.net.wires.rule.name

　

1) Does that means some of the wire segments of a net are routed with different rules? Why this is happening ?

2) How to select these wire segments.There is command selectNet to select nets. What is the commands to select wire segments.

　

It will be grateful if some one helps

  • I'm not sure why you see 2 different rules on the net. You can run the following to select wires for a specified rule. Change "double" to the rule you want to select segments for:


    set ruleName "double"
    set wireWithRulePtr [dbGet -p2 top.nets.wires.rule.name $ruleName]
    foreach wire $wireWithRulePtr {
      set netName [dbGet $wire.net.name]
      set box [lindex [dbGet $wire.box] 0]
      set layer [dbGet $wire.layer.name]
      eval editSelect -net $netName -area $box -layer $layer
    }

    Hope this helps,
    Brian

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