Template-based circuit understanding

Adria Gascon, Pramod Subramanyan, Bruno Dutertre, Ashish Tiwari, Dejan Jovanovic, Sharad Malik
2014 2014 Formal Methods in Computer-Aided Design (FMCAD)  
When verifying or reverse-engineering digital circuits, one often wants to identify and understand small components in a larger system. A possible approach is to show that the sub-circuit under investigation is functionally equivalent to a reference implementation. In many cases, this task is difficult as one may not have full information about the mapping between input and output of the two circuits, or because the equivalence depends on settings of control inputs. We propose a template-based
more » ... e a template-based approach that automates this process. It extracts a functional description for a low-level combinational circuit by showing it to be equivalent to a reference implementation, while synthesizing an appropriate mapping of input and output signals and setting of control signals. The method relies on solving an exists/forall problem using an SMT solver, and on a pruning technique based on signature computation.
doi:10.1109/fmcad.2014.6987599 dblp:conf/fmcad/GasconSDTJM14 fatcat:3b7ao7xpbnh6vhz3nxxlwo4zgu