WIP uncore and rocket changes compile

src/main/scala/util/Misc.scala

@@ -36,6 +36,23 @@ object MuxT {
     (Mux(cond, con._1, alt._1), Mux(cond, con._2, alt._2), Mux(cond, con._3, alt._3))
 }
 
+/** Creates a cascade of n MuxTs to search for a key value. */
+object MuxTLookup {
+  def apply[S <: UInt, T <: Data, U <: Data](key: S, default: (T, U), mapping: Seq[(S, (T, U))]): (T, U) = {
+    var res = default
+    for ((k, v) <- mapping.reverse)
+      res = MuxT(k === key, v, res)
+    res
+  }
+
+  def apply[S <: UInt, T <: Data, U <: Data, W <: Data](key: S, default: (T, U, W), mapping: Seq[(S, (T, U, W))]): (T, U, W) = {
+    var res = default
+    for ((k, v) <- mapping.reverse)
+      res = MuxT(k === key, v, res)
+    res
+  }
+}
+
 object Str
 {
   def apply(s: String): UInt = {