Merge remote-tracking branch 'origin/master' into regressions

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>());
     }

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) {

gui/designwidget.cc

@@ -706,8 +706,12 @@ void DesignWidget::onSelectionChanged(int num, const QItemSelection &, const QIt
         addProperty(topItem, QVariant::String, "Type", ctx->getPipType(pip).c_str(ctx));
         addProperty(topItem, QVariant::Bool, "Available", ctx->checkPipAvail(pip));
         addProperty(topItem, QVariant::String, "Bound Net", ctx->nameOf(ctx->getBoundPipNet(pip)), ElementType::NET);
+        if (ctx->getConflictingPipWire(pip) != WireId()) {
             addProperty(topItem, QVariant::String, "Conflicting Wire",
                         ctx->getWireName(ctx->getConflictingPipWire(pip)).c_str(ctx), ElementType::WIRE);
+        } else {
+            addProperty(topItem, QVariant::String, "Conflicting Wire", "", ElementType::NONE);
+        }
         addProperty(topItem, QVariant::String, "Conflicting Net", ctx->nameOf(ctx->getConflictingPipNet(pip)),
                     ElementType::NET);
         addProperty(topItem, QVariant::String, "Src Wire", ctx->getWireName(ctx->getPipSrcWire(pip)).c_str(ctx),

gui/fpgaviewwidget.cc

@@ -102,7 +102,7 @@ void FPGAViewWidget::newContext(Context *ctx)
     pokeRenderer();
 }
 
-QSize FPGAViewWidget::minimumSizeHint() const { return QSize(640, 480); }
+QSize FPGAViewWidget::minimumSizeHint() const { return QSize(320, 200); }
 
 QSize FPGAViewWidget::sizeHint() const { return QSize(640, 480); }
 

ice40/arch.cc

@@ -594,26 +594,29 @@ std::vector<GroupId> Arch::getGroupGroups(GroupId group) const
 bool Arch::getBudgetOverride(const NetInfo *net_info, const PortRef &sink, delay_t &budget) const
 {
     const auto &driver = net_info->driver;
-    if (driver.port == id_COUT && sink.port == id_CIN) {
+    if (driver.port == id_COUT) {
-        if (driver.cell->constr_abs_z && driver.cell->constr_z < 7)
+        NPNR_ASSERT(sink.port == id_CIN || sink.port == id_I3);
+        NPNR_ASSERT(driver.cell->constr_abs_z);
+        bool cin = sink.port == id_CIN;
+        bool same_y = driver.cell->constr_z < 7;
+        if (cin && same_y)
             budget = 0;
         else {
-            NPNR_ASSERT(driver.cell->constr_z == 7);
             switch (args.type) {
 #ifndef ICE40_HX1K_ONLY
             case ArchArgs::HX8K:
 #endif
             case ArchArgs::HX1K:
-                budget = 190;
+                budget = cin ? 190 : (same_y ? 260 : 560);
                 break;
 #ifndef ICE40_HX1K_ONLY
             case ArchArgs::LP384:
             case ArchArgs::LP1K:
             case ArchArgs::LP8K:
-                budget = 290;
+                budget = cin ? 290 : (same_y ? 380 : 670);
                 break;
             case ArchArgs::UP5K:
-                budget = 560;
+                budget = cin ? 560 : (same_y ? 660 : 1220);
                 break;
 #endif
             default: