I am attaching a block diagram of sequential unsigned multiplier . please modify this block diagram and provide me a block diagram that perform the sequential signed multiplier implementing the shift-and-add algorithm. I need urgent solution

This is the sequential unsigned multiplier implementing the shift-and-add algorithm

O S2k..k+1 Sk init 10 en X init en en clk en >> d REG q Jk sout clk > SRR a k xj = Po P2k-1..k Pk-1..0 AND cout ADD k+1 S2k..k O S2k..k+1 Sk init 10 en X init en en clk en >> d REG q Jk sout clk > SRR a k xj = Po P2k-1..k Pk-1..0 AND cout ADD k+1 S2k..k