A Roadmap for Formal Property Verification by Pallab Dasgupta

By Pallab Dasgupta

Integrating formal estate verification (FPV) into an current layout method increases numerous fascinating questions. Have I written sufficient homes? Have I written a constant set of homes? What should still I do while the FPV device runs into capability concerns? This booklet develops the solutions to those questions and matches them right into a roadmap for formal estate verification – a roadmap that indicates the way to glue FPV expertise into the normal validation stream. A Roadmap for Formal estate Verification explores the most important concerns during this robust expertise via uncomplicated examples – you don't want any history on formal easy methods to learn such a lot components of this book.

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Extra info for A Roadmap for Formal Property Verification

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9 shows the structure of the test bench for the arbiter. We need to bind the interface, ArbChecker, with the arbiter. One way to do this is to bind the interface with the test bench using the following statement. bind Top ArbChecker ArbC( g1, g2, r1, r2, clk ) Binding is an important step in assertion-based verification. It associates the names of the signals used in our properties with the names of the corresponding signals in the RTL module. This ability to create an association between the propositional variables in the properties and the RTL variables used in the module enables us to delineate the task of creating a verification IP for a design from the task of writing the RTL.

SVA allows us to specify assume properties to describe the assumptions about the environment, and assert properties to describe the properties that must be guaranteed by the module under the given assumptions. This style of reasoning is called assume-guarantee reasoning. As an example, let us return to our priority arbiter example. Suppose we add the property: every low priority request, r2, is eventually granted by the arbiter by asserting g2. We can write this property as: property NoStarvation; @(posedge clk) r2 |− > ##[1:$] g2 ; endproperty This property will not hold under all circumstances.

Linear time logics allow the specification of properties over linear traces or 26 2 Languages for Temporal Properties runs of a finite state machine – intuitively, we say that the property holds on the machine if it holds on all runs of the machine. Branching time logics allow the specification of properties over the computation tree created by a state traversal of the state machine. 1 Linear Temporal Logic Designers and validation engineers typically express and interpret the RTL in terms of the simulation semantics of the HDL.

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