Bit Twiddling Hacks: interleave bits the obvious way [closed]

Answer 1

"Interleaving" means that you combine the two numbers by alternating bits from each source. It's easier to see with the following example

x = 0000
y = 1111

result = 01010101

Interleaving the two values you've given gives the following result:

x = 100101 
y = 010101

result = 100100110011