finish api setup, ready to connect

include/alu.h

@@ -1,4 +1,23 @@
 #pragma once
 #ifndef ALU_H
 #include "tools.h"
+struct ALU_Input {
+  dark::Wire<7 + 3 + 1> request_full_id;
+  dark::Wire<32> operand1;
+  dark::Wire<32> operand2;
+  dark::Wire<5> request_ROB_index;
+};
+struct ALU_Output {
+  dark::Register<1> done;
+  dark::Register<32> result;
+  dark::Register<5> result_ROB_index;
+};
+struct ALU : public dark::Module<ALU_Input, ALU_Output> {
+  ALU() {
+    // Constructor
+  }
+  void update() {
+    // Update function
+  }
+};
 #endif