Required Task:

Use the structural modeling to implement the following N $-$bit ALU.

Description:

The ALU has two $16-$bit data input signals $($ A and $B)$ and $3-$bit control signals $($ALU$\_$Op$)$ that specifies the

operation to be performed. The output of ALU is also $16-$bit result signal $($Result$)$ and two status flags $($Zero

and Carry$).$

The ALU can perform the listed operations in table $1.$ Note that the subtraction should be performed in two's

complement. A shift left logical $($SHL$)$ of one position moves each bit to the left by one. The low$-$order bit $($the

right$-$most bit$)$ is replaced by a zero bit and the high$-$order bit $($the left$-$most bit$)$ is discarded.

Fig. $1$: N$-$bit ALU unit

Table $1$: $N-$bit ALU operations