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timing: Add --ignore-loops option

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Signed-off-by: David Shah <dave@ds0.me>
This commit is contained in:
David Shah 2018-12-14 13:06:00 +00:00 committed by David Shah
parent 6d664046d3
commit 564a7e27b1
2 changed files with 7 additions and 1 deletions
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6
common/command.cc
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@ -124,6 +124,8 @@ po::options_description CommandHandler::getGeneralOptions()
general.add_options()("cstrweight", po::value<float>(), "placer weighting for relative constraint satisfaction"); general.add_options()("cstrweight", po::value<float>(), "placer weighting for relative constraint satisfaction");
general.add_options()("pack-only", "pack design only without placement or routing"); general.add_options()("pack-only", "pack design only without placement or routing");
general.add_options()("ignore-loops", "ignore combinational loops in timing analysis");
general.add_options()("version,V", "show version"); general.add_options()("version,V", "show version");
general.add_options()("test", "check architecture database integrity"); general.add_options()("test", "check architecture database integrity");
general.add_options()("freq", po::value<double>(), "set target frequency for design in MHz"); general.add_options()("freq", po::value<double>(), "set target frequency for design in MHz");
@ -172,6 +174,10 @@ void CommandHandler::setupContext(Context *ctx)
} }
} }
if (vm.count("ignore-loops")) {
settings->set("timing/ignoreLoops", true);
}
if (vm.count("cstrweight")) { if (vm.count("cstrweight")) {
settings->set("placer1/constraintWeight", vm["cstrweight"].as<float>()); settings->set("placer1/constraintWeight", vm["cstrweight"].as<float>());
} }

2
common/timing.cc
View File

@ -225,7 +225,7 @@ struct Timing
} }
// Sanity check to ensure that all ports where fanins were recorded were indeed visited // Sanity check to ensure that all ports where fanins were recorded were indeed visited
if (!port_fanin.empty()) { if (!port_fanin.empty() && !bool_or_default(ctx->settings, ctx->id("timing/ignoreLoops"), false)) {
for (auto fanin : port_fanin) { for (auto fanin : port_fanin) {
NetInfo *net = fanin.first->net; NetInfo *net = fanin.first->net;
if (net != nullptr) { if (net != nullptr) {