16 bit Barrel shifter question for paper

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I would like to give a question regarding to barrel 16 shifter in paper its code should be in VHDL. kindly anyone help me to provide me a question and its solution.. I'm new in VHDL language.
 

Basically, it's a bunch of multiplexers. Once you understand that, writing the VHDL should be pretty straight forward.

Here's a start:
https://en.wikipedia.org/wiki/Barrel_shifter

If I were doing this, I wouldn't bother with the explicit muxes; the synthesis tool should be able to infer that from your higher-level description.
 

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