how to extract bits in verilog

[cutesue]

i want to extract first four bits of an IP address,then next 4bits,then next 4 and so on in a 32bit IP address sequence...in verilog.how do i do that?

 

[mersault]

Hello,

You have to do an AND operation between the IP address and a mask and then shifts operations
Example:

If you need the first 4 bits you have to do (IP address) & (0x0000000F) without a shift
If you need the second group of 4 bits you have to do [ (IP address) & (0x000000F0)] >> 4
and so on...

Hope this helps.

 

[cutesue]

can you pl tell me how to do this right shift in gate level.. shd i use an encoder?

 

[mersault]

If you are writing the program in verilog, the ">>" command does the right shift.

 

[cutesue]

okay..thank you..