cnoa said:
Why 32 Why 64. I mean if it were 512 bit all of the processing can be done from one instruction?
Your question makes no sense whatsoever. There is no relation of "bit" to instruction calculation depth. If you have no underlying concept of programming or computing, why are you asking the question? Was this some question on some comp sci exam? We are not here to help with schoolwork or to explain programming fundamentals, that is what reading books is for.