Tristate debugging

Author: akashlevy

liberty/LibertyBuilder.cc

@@ -308,19 +308,19 @@ LibertyBuilder::makeCombinationalArcs(LibertyCell *cell,
 				      TimingArcAttrsPtr attrs)
 {
   FuncExpr *func = to_port->function();
-  FuncExpr *enable = to_port->tristateEnable();
+  // FuncExpr *enable = to_port->tristateEnable();
   TimingArcSet *arc_set = makeTimingArcSet(cell, from_port, to_port,
 					   TimingRole::combinational(), attrs);
   TimingSense sense = attrs->timingSense();
   if (sense == TimingSense::unknown) {
     // Timing sense not specified - find it from function.
     if (func && func->hasPort(from_port))
       sense = func->portTimingSense(from_port);
-    // Check tristate enable.
-    else if (to_port->direction()->isAnyTristate()
-             && enable
-             && enable->hasPort(from_port))
-      sense = TimingSense::non_unate;
+//     // Check tristate enable.
+//     else if (to_port->direction()->isAnyTristate()
+//              && enable
+//              && enable->hasPort(from_port))
+//       sense = TimingSense::non_unate;
     // Don't warn for functions that reference ff/latch/lut internal ports.
     //else if (func->port() && !func->port()->direction()->isInternal())
     //  report_->fileWarn(172, cell->filename(), line,

liberty/LibertyReader.cc

@@ -3454,10 +3454,14 @@ LibertyReader::visitThreeState(LibertyAttr *attr)
 {
   if (ports_) {
     const char *three_state = getAttrString(attr);
+    printf("DEBUG THREE_STATE: %s %s\n", cell_->name(), three_state);
     if (three_state) {
-      for (LibertyPort *port : *ports_)
-	makeLibertyFunc(three_state, port->tristateEnableRef(), true,
-			"three_state", attr);
+      for (LibertyPort *port : *ports_) {
+        printf("  THREE_STATE PORT: %s\n", port->name());
+        makeLibertyFunc(three_state, port->tristateEnableRef(), true,
+                        "three_state", attr);
+        printf("  THREE_STATE PORT ENABLE REF: %p\n", port->tristateEnableRef());
+      }
     }
   }
 }