What integer hash function are good that accepts an integer hash key?

Question

What integer hash function are good that accepts an integer hash key?

Answer 1

• 32-bits multiplicative method (very fast) see @rafal

  #define hash32(x) ((x)*2654435761)
  #define H_BITS 24 // Hashtable size
  #define H_SHIFT (32-H_BITS)
  unsigned hashtab[1<> H_SHIFT
  

• 32-bits and 64-bits (good distribution) at : MurmurHash

• Integer Hash Function