Value Proposition

When constraints are mapped, promoted, demoted or merged comments in the SDC written out by FishTail maintain the location of the original constraint, allowing engineers to easily review the user Tcl and the comments associated with it even while working with an SDC file written out by a tool.

Our mode-merging solution imposes no restrictions on the way the constraints should be written for each mode being merged. Nor are there any restrictions on the number of modes being merged. Scenario merging is supported. There is no requirement that one mode dominate another. Users can request signoff quality merged constraints, or simpler constraints for driving implementation.

After automatically mapping top-level clocks to IP clocks, timing exceptions inside IPs are carefully promoted up the hierarchy while ensuring that their scope remains within the block for which they were specified. This prevents a common mistake when reusing IP constraints – applying them on an SoC with a scope that is broader than what was verified to be correct at the IP level.

Immediately after constraints are mapped, promoted, demoted or merged, the quality of these transformations is established by using the best-in-class SDC Equivalence verification solution in the industry that is exhaustive (all paths are verified), yet fast. Any discrepancies are easily rootcaused using a powerful debug tool.

FishTail’s SDC management solution takes SDC or TCL constraints from one design representation and transforms it to another, working with either RTL or netlist input. Our SDC management solution is used to map RTL constraints to the gate-level, transform gate-level constraints so they apply to RTL, promote IP constraints into an SoC, demote SoC constraints down to implementation blocks, merge multi-mode constraints into a single super-mode. The integrity of all these transformations is verified using an SDC Equivalence verification solution.

SDC Management Solutions

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Constraint Management

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Constraint Management

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Constraint Management

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