Clock alias for timing analysis of an integrated circuit design
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United States of America Patent
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Mar 25, 2014
Grant Date -
Mar 21, 2013
app pub date -
Nov 14, 2012
filing date -
Apr 29, 2010
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Abstract
A timing analysis mechanism allows defining a clock alias that correlates a clock that is not present in an integrated circuit design to a real clock in the integrated circuit design. In a first implementation, when an existing user assertion references a clock alias, the timing analysis mechanism generates a new user assertion that references the real clock specified in the clock alias. The new user assertion is then used in the timing analysis and the existing user assertion is not. In a second implementation, when an existing user assertion references a clock alias, the timing analysis mechanism generates a duplicate clock in the timing database, preserving all its attributes, and then passes the assertion using the alias name as well as any assertions using the corresponding real clock name to the timing engine to be used in the timing analysis.
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