provides signal name methods for firrtl annotation and chisel testers

* signalName: returns the chirrtl name of the signal

* pathName: returns the full path name of the signal from the top module

* parentPathName: returns the full path of the signal's parent module instance from the top module

* parentModName: returns the signal's parent **module(not instance)** name.

2 files changed, 22 insertions, 3 deletions

diff --git a/chiselFrontend/src/main/scala/chisel3/core/Aggregate.scala b/chiselFrontend/src/main/scala/chisel3/core/Aggregate.scala
index de64cb3d..82c6097f 100644
--- a/chiselFrontend/src/main/scala/chisel3/core/Aggregate.scala
+++ b/chiselFrontend/src/main/scala/chisel3/core/Aggregate.scala
@@ -374,4 +374,5 @@ class Bundle extends Aggregate(NO_DIR) {
 
 private[core] object Bundle {
   val keywords = List("flip", "asInput", "asOutput", "cloneType", "toBits",
-   "widthOption", "signalName", "signalPathName", "signalParent", "signalComponent")
+    "widthOption", "signalName", "signalPathName", "signalParent", "signalComponent")
+}
diff --git a/chiselFrontend/src/main/scala/chisel3/core/Module.scala b/chiselFrontend/src/main/scala/chisel3/core/Module.scala
index 4f25515b..eb48a14d 100644
--- a/chiselFrontend/src/main/scala/chisel3/core/Module.scala
+++ b/chiselFrontend/src/main/scala/chisel3/core/Module.scala
@@ -31,7 +31,9 @@ object Module {
     m._commands.prepend(DefInvalid(childSourceInfo, m.io.ref)) // init module outputs
     dynamicContext.currentModule = parent
     val ports = m.computePorts
-    Builder.components += Component(m, m.name, ports, m._commands)
+    val component = Component(m, m.name, ports, m._commands)
+    m._component = Some(component)
+    Builder.components += component
     pushCommand(DefInstance(sourceInfo, m, ports))
     m.setupInParent(childSourceInfo)
   }
@@ -63,8 +65,24 @@ extends HasId {
   /** Legalized name of this module. */
   final val name = Builder.globalNamespace.name(desiredName)
 
+  /** FIRRTL Module name */
+  private var _modName: Option[String] = None
+  private[chisel3] def setModName(name: String) = _modName = Some(name)
+  def modName = _modName match {
+    case Some(name) => name
+    case None => throwException("modName should be called after circuit elaboration")
+  }
+
+  /** Keep component for signal names */
+  private[chisel3] var _component: Option[Component] = None
+
+
   /** Signal name (for simulation). */
-  override def signalName(component: Component) = name
+  override def signalName =
+    if (_parent == None) name else _component match {
+      case None => getRef.name
+      case Some(c) => getRef fullName c
+    }
 
   /** IO for this Module. At the Scala level (pre-FIRRTL transformations),
     * connections in and out of a Module may only go through `io` elements.