Formal Methods in System Design
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We present a methodology in which the behavior of custom memories can be abstracted by a couple of artifacts { one for the interface and another for the contents. Memories consisting of several ports result into several user-provided abstract specifications, which in turn can be converted to simulation models. We show that (i) a simulation model is an approximation of the corresponding abstract specification and (ii) the abstracted memory core can be composed with the un- abstracted surrounding logic using a simple theory of composition. We make use of this methodology to verify equivalence between register transfer level and transistor level descriptions of custom memories.