diff --git a/lab1/src/main/scala/riscv/core/Execute.scala b/lab1/src/main/scala/riscv/core/Execute.scala
index c2b16a0..0ca0e39 100644
--- a/lab1/src/main/scala/riscv/core/Execute.scala
+++ b/lab1/src/main/scala/riscv/core/Execute.scala
@@ -47,9 +47,17 @@ class Execute extends Module {
   alu_ctrl.io.funct7 := funct7
 
   // lab1(Execute)
-
-
-
+  alu.io.func := alu_ctrl.io.alu_funct
+  alu.io.op1 := Mux(
+    io.aluop1_source === ALUOp1Source.Register,
+    io.reg1_data,
+    io.instruction_address
+  )
+  alu.io.op2 := Mux(
+    io.aluop2_source === ALUOp2Source.Register,
+    io.reg2_data,
+    io.immediate
+  )
 
 
   // lab1(Execute) end