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What do the vsim-SDF-3438 warnings mean?

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pandit_vlsi

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Hi All,
i am annaotating SDF into my design.
After simulation i am getting the warnings with code vsim-SDF-3438.
can i know
1. Why these warnings have surfaced?
2.can i ignore these warnings?


Thanks,
Pandit.
 

aji_vlsi

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vsim sdf 3438

Use verror command:

Verror 3438 said:
Owner@cvc ~
$ verror.exe 3438

vsim Message # 3438:
A non-zero INTERCONNECT delay is specified from a source output lower
in the hierarchy to a destination output higher in the hierarchy.
Verilog-XL treats such an INTERCONNECT delay as a delay on the drivers
of the source. ModelSim adds the INTERCONNECT delay to the driver delays
because there may also be IOPATH delays (which must come before the
INTERCONNECT delays in the SDF file). (Note that output to output delays
are not legal according to the SDF Specification.)

HTH
Ajeetha, CVC
www.noveldv.com
 

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