
Straight-through addition



Stage 1


	A ---+--- xor  ------+
	     | 	   |	     |
	B ------+--+	     |
	     |	|	     +--------------  A
             |  |
             |  |
             |  +-- and ----- Lft Shift  ---  B
	     |       |
	     +-------+  
		


32 stages, final answer is A from the final stage	