Download Applied Formal Verification by Douglas L. Perry, Harry Foster PDF

By Douglas L. Perry, Harry Foster

Formal verification is a strong new electronic layout technique. during this state of the art instructional, of the field's top identified authors staff as much as exhibit designers the best way to successfully observe Formal Verification, in addition to description languages like Verilog and VHDL, to extra successfully clear up real-world layout difficulties.

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Today, mathematical reasoning techniques offer dramatic improvement over simulation and test vectors in establishing proof of equality for many designs. , the revised model) satisfies its specification (the reference model). What traditionally took weeks and days to only partially check using a simulation-based approach can now be verified completely on many designs in a matter of hours and minutes using formal boolean equivalence verification. Furthermore, formal equivalence-checking tools are one of three key components of today’s RTL static sign-off flow, along with static-timing-verifier and automatic test pattern generation tools.

2. A list of processes that need to be run is generated each time cycle; then each process is run one at a time, one after the other. 3 shows how the HDL software simulator will execute processes. If an event occurs that triggers process 1, that process will execute and cause process 2 to execute during the next cycle. Process 2 will trigger process 3 and process 7 to execute the next cycle. 17 Copyright © 2005 by The McGraw-Hill Companies, Inc. Click here for terms of use. 3 Process Changes Process 1 Cycle1 Process 2 Cycle2 Process 3 Cycle3 Process 7 Process 4 Cycle4 Process 6 This is a very natural way to view the operation of the design, except that in the real hardware all these operations happen concurrently.

Note that while in theory a simulation testbench has high controllability of its input ports for the design under verification, testbenches generally have poor controllability over internal points. Observability, in contrast, is a measurement of the ability to observe the effects of a specific, internal, stimulated point. , often internal signals and structures are hidden from the testbench). , sensitize) a bug at some point in the design. Proper input stimulus must be generated to propagate all effects resulting from the bug to an output port.

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