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why lec performed at various steps

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narureddyk

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why logical equivalence check is performed at various steps in some designs?
 

As we go through various design step original netlist is modified many times for example for optimization etc. LEC check whether modified netlist still performs intended function or not i.e. it is logically equivalent to original net list.
 
Is lec performed on the flattened netlist or hierarchical netlist if yes why? if no why?
 

LEC can be performed both on hierarchical netlist and flat netlist.. Equivalence check is done to check whether netlist (after synthesis optimisation, post cts, post route) is logically equivalent to golden RTL or netlist..
 
Netlist is changed in both the cases. LEC is performed if there is change in Netlist. So LEC is performed in both the cases.
 
what is the meaning of golden exactly
 

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