Almost working jump.

src/main/scala/ID.scala

@@ -33,6 +33,8 @@ class InstructionDecode extends MultiIOModule {
       val memWrite = Output(Bool())
       val memRead = Output(Bool())
       val branchType = Output(UInt(3.W))
+      val jump = Output(Bool())
+      val returnAddr = Output(UInt(32.W))
     }
   )
 
@@ -73,6 +75,9 @@ class InstructionDecode extends MultiIOModule {
   io.r1Value := registers.io.readData1
   io.r2Value := registers.io.readData2
 
+  io.jump := decoder.controlSignals.jump
+  io.returnAddr := io.pc + 4.U
+
   io.ALUOp := decoder.ALUop
   io.branchType := decoder.branchType
   io.writeAddrOut := decoder.instruction.registerRd