Constraint-Based Verification by Jun Yuan

By Jun Yuan

Constraint-Based Verifcation covers the rising box in useful verification of digital designs thats is now typically spoke of through this name.

Topics are built within the context of a variety of dynamic and static verification methods together with stimulation, emulation and formal tools. The aim is to teach how constraints, or assertions, can be utilized towards automating the new release of testbenches, leading to a continuing verifcation stream. subject matters akin to verification assurance, and reference to assertion-based verification also are covered.

Constraint-Based Verification is written for verification engineers, in addition to researchers - it explains either methodological and technical matters. specific tension is given to the most recent advances in practical verification.

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In all of the languages, constraints are commutative by default. However, in SVRC, a variable ordering can be imposed. This provides an extra control on randomization, as well as simplifies constraint solving. The caveat is that variable ordering alters a constraint: it makes the constraint tighter and can cause the constraint solving to fail. 3 Randomization Several randomization schemes are provided by these languages. By default, the SVRC and SCV constraint solvers realize a uniform distribution.

If the constraints are satisfiable, then the generator will produce an input with no backtracking. 2. Without user-specified weighting, the generated inputs follow the uniform distribution. Constraint solving in Simgen is preceded by several passes of optimizations, including extraction and simplification, partitioning, and decomposition [YKAP02, YPAA03]. 3 Prioritized Constraints To further enhance its constraint solving capacity, Simgen introduced a new concept called prioritized constraints. Prioritized constraints are basically normal constraints assigned with priority levels.

Chapters 3 and 4 are devoted to front-end language issues, while the remaining chapters give an in-depth treatment of the back-end technical issues of constrained random simulation. In Chapter 3, high level design and verification languages are reviewed, together with the specific requirements of constrained random simulation language constructs. Later in this chapter, we focus our discussion on the verification language of SystemVerilog. This refines the constrained random simulation concepts introduced in Chapter 2.

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