failing [option]
where option is one of the following:all
unordered
summary
The failing command returns a list of all the names of the nets that have not been routed due to failure. This is largely for diagnostic purposes. However, the form "failing all" has a special purpose, to place all the nets in the design onto the failing list. This allows the first stage routing to be bypassed, with all routing being performed in the second stage (rip-up and re-route)."failing unordered" moves all nets to the failing list as they were originally ordered (instead of sorted by number of nodes).
"failing summary" returns a list of two values: the number of nets that have failed to route, and the total number of nets in the design. Note that upon loading a DEF file, the number of failing nets is zero; this does not get updated until one of the route stages has been run.
failing is implemented as a built-in command in qrouter, only in the Tcl version.
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Last updated: June 14, 2017 at 11:43am