first crack at continuous compilation/testing flow

try it out: cd emulator; make test

src/main/scala/Main.scala

@@ -0,0 +1,51 @@
+package ReferenceChip
+
+import sys.process._
+import Chisel._
+
+object Main
+{
+  def classOf(x: String) = try {
+    Class.forName(x)
+  } catch {
+    case _: ClassNotFoundException => {
+      val myPackage = getClass.getName.reverse.dropWhile(_ != '.').reverse
+      Class.forName(myPackage+x)
+    }
+  }
+
+  def main(allArgs: Array[String]): Unit = {
+    require(allArgs.length >= 4, "syntax: run <command> <component> <backend> <dir> [args]")
+    val cmd = allArgs(0)
+    val compName = allArgs(1)
+    val backendName = allArgs(2)
+    val dir = allArgs(3)
+
+    val backend = try {
+      classOf(backendName).getName
+    } catch {
+      case _ => backendName
+    }
+
+    println("I'm gonna "+cmd+" component "+compName+" with backend "+backendName+"...")
+    val comp = classOf(compName)
+
+    val chiselArgs = allArgs.drop(4) ++ Array("--targetDir", dir, "--backend", backend)
+
+    val makeDir = dir+"/.."
+    val jobs = Runtime.getRuntime.availableProcessors
+    val make = "make -C" + makeDir + " -j" + jobs
+    val action = cmd match {
+      case "elaborate" => () =>
+      case "build" => () => make!
+      case "test" => () => {
+        if ((make+" run-fast"!) == 0) println("PASSED")
+        else println("FAILED")
+      }
+      case _ => throw new IllegalArgumentException("unknown command "+cmd)
+    }
+
+    chiselMain(chiselArgs, () => comp.newInstance.asInstanceOf[Component])
+    action()
+  }
+}

src/main/scala/RocketChip.scala

@@ -239,20 +239,3 @@ class Top extends Component {
   io.mem <> uncore.io.mem
   io.debug.error_mode := error_mode
 }
-
-object top_main {
-  def main(args: Array[String]): Unit = { 
-    val top = args(0)
-    val chiselArgs = ArrayBuffer[String]()
-
-    var i = 1
-    while (i < args.length) {
-      val arg = args(i)
-      chiselArgs += arg
-      i += 1
-    }
-
-    chiselMain(chiselArgs.toArray, () => Class.forName(top).newInstance.asInstanceOf[Component])
-  }
-}
-