How to count the number of ones in a byte without a loop in c?

Possible Duplicate:
Best algorithm to count the number of set bits in a 32-bit integer?

Hello,

Is there a more compact way of counting the number of ones in a byte without using a loop? I don't want to do the following if I don't have to. Thanks.

char myValue = 0x0F;

int counter = 0;

while (myValue > 0)
{
 if (myValue & 0x01)
 {
  counter ++;

 }

 myValue = myValue >> 1;
}

Answer

 ((i>>3)&1)+((i>>2)&1)+((i>>1)&1)+(i&1)

Or use assembly (SSE/MMX).

http://gurmeet.net/puzzles/fast-bit-counting-routines/