While this may be an easy way to think about overflow, is it practical in

implementation? Compare your implementation to the simple

implementation of setting overflow $=$ c n$-1$ c n$.$

Module $41$ David O$.$ Johnson EECS $140/1411$

FA

xn $1$

cn cn$-1$

yn $1$

sn $1$

FA

x$1$

c$2$

y$1$

s$1$

FA

c$1$

x$0$ y$0$

s$0$

c$0$

MSB position LSB position