•  You can get VHDL source code for division here: 

  • Division.vhd

  • Division8.vhd

  • Division16.vhd

  • Generic n-bit Division here

For most digital designs can you trade between area and speed:

A sequential n-bit divider will use n-clock pulses in order to produces the result (Quotient : Remainder)
On the other hand will a "true parallel" combinatorial division-circuit typically use 3 to 10x times more logic.

The principle of a sequentiel division can be found in textbooks and served as background for the VHDL sources found at this page.
Please visit this site in order to study combinatorial division and get a automatic generated VHDL source for n-bit division.