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This article addresses the problem of nondeterminism due to design optimization such as resetting only parts of the design register. Since formal methods are not scalable, the authors developed a scalable X-analysis method.
Due to increases in design complexity, routing a reset signal to all registers is becoming more difficult. One way to solve this problem is to reset only certain registers and rely on a software initialization sequence to reset other registers. This approach, however, may allow unknown values (also called X-values) in uninitialized registers to leak to other registers, leaving the design in a nondeterministic...
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