Unique int to int hash

Question

I\'m curious as to whether or not there\'s some simple and/or well known hash method with the following properties:

1. It transforms a 32-bit int into another 32-

Answer 1

A simple approach: hash(x) = rotate-shl(x, K1) xor C

You can combine several simple operations to achieve more "random" result, like rotate-shl/shr, bit-reverse, xor, not and so on.