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formalff: Document -declockgate option

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This commit is contained in:
Jannis Harder 2025-02-12 17:45:02 +01:00
parent 904b4194cc
commit 43b5e109f3
1 changed files with 6 additions and 0 deletions
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6
passes/sat/formalff.cc
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@ -538,6 +538,12 @@ struct FormalFfPass : public Pass {
log(" Add assumptions that constrain wires with the 'replaced_by_gclk'\n"); log(" Add assumptions that constrain wires with the 'replaced_by_gclk'\n");
log(" attribute to the value they would have before an active clock edge.\n"); log(" attribute to the value they would have before an active clock edge.\n");
log("\n"); log("\n");
log(" -declockgate\n");
log(" Detect clock-gating patterns and modify any FFs clocked by the gated\n");
log(" clock to use the ungated clock with the gate signal as clock enable.\n");
log(" This doesn't affect the design's behavior during FV but can enable the\n");
log(" use of formal verification methods that only support a single global\n");
log(" clock.\n");
// TODO: An option to check whether all FFs use the same clock before changing it to the global clock // TODO: An option to check whether all FFs use the same clock before changing it to the global clock
} }