How to efficiently de-interleave bits (inverse Morton)

Question

This question: How to de-interleave bits (UnMortonizing?) has a good answer for extracting one of the two halves of a Morton number (just the odd bits), but I need a solutio

Answer 1

If your processor handles 64 bit ints efficiently, you could combine the operations...

int64 w = (z &0xAAAAAAAA)<<31 | (z &0x55555555 )
w = (w | (w >> 1)) & 0x3333333333333333;
w = (w | (w >> 2)) & 0x0F0F0F0F0F0F0F0F; 
...