http://s290.photobucket.com/albums/ll279/transgalactic/?action=view&current=IMG_8838.jpg

the main problem comes when in one input i need to divide the number by 2
(subtract a zero from the original input)

while in other control input i need to multiply by two
(which meens to add a zero to the original input)

i dont know how to delete or add an output
when i have a certain control input

the number of outputs is constant

what should i do??

 

Shifting bits left one place multiplies by two. Right divides by two.

 

but i dont have a shift register.
i need to implement it using four MUX 4-1 three AND two OR

how to build it using these components
?????