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| author | David Shah <dave@ds0.me> | 2018-12-14 13:06:00 +0000 |
|---|---|---|
| committer | David Shah <davey1576@gmail.com> | 2019-02-05 08:20:05 +0100 |
| commit | 564a7e27b125302101c76f5b347880df0381a5ad (patch) | |
| tree | 26ef7189b875729c4a13fea4755573b3326d9360 | |
| parent | 6d664046d3774c8fa2a9dccb64dd8ab06cc0cd0a (diff) | |
| download | nextpnr-564a7e27b125302101c76f5b347880df0381a5ad.tar.gz nextpnr-564a7e27b125302101c76f5b347880df0381a5ad.tar.bz2 nextpnr-564a7e27b125302101c76f5b347880df0381a5ad.zip | |
timing: Add --ignore-loops option
Signed-off-by: David Shah <dave@ds0.me>
| -rw-r--r-- | common/command.cc | 6 | ||||
| -rw-r--r-- | common/timing.cc | 2 |
2 files changed, 7 insertions, 1 deletions
diff --git a/common/command.cc b/common/command.cc index 6ba3442f..8f18f54d 100644 --- a/common/command.cc +++ b/common/command.cc @@ -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()("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()("test", "check architecture database integrity"); 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")) { settings->set("placer1/constraintWeight", vm["cstrweight"].as<float>()); } diff --git a/common/timing.cc b/common/timing.cc index f3cb4306..13f0e07b 100644 --- a/common/timing.cc +++ b/common/timing.cc @@ -225,7 +225,7 @@ struct Timing } // 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) { NetInfo *net = fanin.first->net; if (net != nullptr) { |