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Improvements in equiv_make, equiv_induct

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This commit is contained in:
Clifford Wolf 2015-01-22 21:23:01 +01:00
parent 5707ba22c1
commit 1cb4c925d0
2 changed files with 46 additions and 0 deletions
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12
passes/equiv/equiv_induct.cc
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@ -136,6 +136,18 @@ struct EquivInductPass : public Pass {
log(" -seq <N>\n");
log(" the max. number of time steps to be considered (default = 4)\n");
log("\n");
log("This command is very effective in proving complex sequential circuits, when\n");
log("the internal state of the circuit quickly propagates to $equiv cells.\n");
log("\n");
log("However, this command uses a weak definition of 'equivalence': This command\n");
log("proves that the two circuits will not diverge after they produce equal\n");
log("outputs (observable points via $equiv) for at least <N> cycles (the <N>\n");
log("specified via -seq).\n");
log("\n");
log("Combined with simulation this is very powerful because simulation can give\n");
log("you confidence that the circuits start out synced for at least <N> cycles\n");
log("after reset.\n");
log("\n");
}
virtual void execute(std::vector<std::string> args, Design *design)
{