4.12 Examine the difficulty of adding a proposed swap Rd, Rn instruction to LEGv8. Interpretation: Reg[Rd]-RegIRn]: RegtRn]-Reg[Rd] 4.12.1 [5] Which new functional blocks (if any) do we need for this instruction? 4.12.2 [10] Which existing functional blocks (if any) require modification? 4.12.3 [5] Modify Figure 4.23 to demonstrate an implementation of this new instruction