Simplify some branches of mux tree

cpu/src/alu/main.mj

@@ -19,16 +19,9 @@ ALU(input1:[32], input2:[32], alu_control:[4], alu_op:[3], use_shamt,
 						), (*TODO*)
 
 					mux(alu_control[1], (* Case logical shift *) (*TODO : optimiser use_shamt ?*)
-						mux(alu_control[3], (* If 1 then arith shift right, else shift right*)
-							mux(use_shamt,
-								shift_by_shamt_ALU(input1, shamt, 1, 1),
-								shift:_by_reg_ALU(input1, input2, 1, 1)
-								),
-
-							mux(use_shamt,
-								shift_by_shamt_ALU(input1, shamt, 1, 0),
-								shift_by_reg_ALU(input1, input2, 1, 0)
-								)
+						mux(use_shamt,
+							shift_by_shamt_ALU(input1, shamt, 1, alu_control[3]),
+							shift:_by_reg_ALU(input1, input2, 1, alu_control[3])
 							),
 
 						mux(use_shamt, (* Case logical shift left *)
@@ -38,7 +31,7 @@ ALU(input1:[32], input2:[32], alu_control:[4], alu_op:[3], use_shamt,
 						)
 					),
 
-				mux(alu_control[1], (*if 1 then logical else airhtmetical *)
+				mux(alu_control[1], (*if 1 then logical else arihtmetical *)
 					mux(alu_control[2],
 						mux(alu_control[3],
 							xor_ALU(input1, input2),
@@ -58,16 +51,13 @@ ALU(input1:[32], input2:[32], alu_control:[4], alu_op:[3], use_shamt,
 							zero_n<32>()
 							),
 
-						mux(alu_control[3],
-							add_ALU(input1, input2, 1),
-							add_ALU(input1, input2, 0)
-							)
+						add_ALU(input1, input2, alu_control[3]),
+						)
 					)
-				)
-			),
+				),
 
 		(*TODO : opérations pas format R *)
 		zero_n<32>()
-	);
+		);
 	alu_zero = equal_zero_n<32>(result);
 end where