Working forwarding (i think).

src/main/scala/EXBarrier.scala

@@ -25,6 +25,9 @@ class EXBarrier extends MultiIOModule {
       val branchOut = Output(Bool())
       val jumpIn = Input(Bool())
       val jumpOut = Output(Bool())
+      val forwardEx = Output(Bool())
+      val forwardExAddr = Output(UInt(5.W))
+      val forwardExData = Output(UInt(32.W))
     })
 
   io.ALUResultOut := io.ALUResultIn
@@ -63,5 +66,8 @@ class EXBarrier extends MultiIOModule {
   val jump = RegInit(Bool(), false.B)
   jump := io.jumpIn
   io.jumpOut := jump
-}
 
+  io.forwardEx := io.writeEnableIn && !io.memReadIn
+  io.forwardExAddr := io.writeAddrIn
+  io.forwardExData := io.ALUResultIn
+}