regarding instant count and gate count

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venkatramanan

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what is the differnce between inst count and gate count.

for ex: 400k inst count means what is the gate count?
 

Inst count = total number of instances. Instances include not only logic gates but fillers, decaps, memories, isolation cells and much more.
So inst count >= gate count.
 

It depends how an instance is defined. An instance is usually defined to mean something from a library, such as a D-Flipflop, or mux, wich is implemented in some number of gates. A DFF might be 8 gates and a Mux might be 4 gates. So 10 instances of a DFF is 80 gates.
 
another one doubt .how clock gating violations occur...how to clear clock gating violatins in PNR
 

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