Algorithms

public int CountBits(uint[] data) {
    int count=0;
    foreach (uint dd in data) {
        uint d=dd;
        while(d!=0) {
            count++;
            d&=d-1;
        }
    }
    return count;
}

int[] bitCountInByte=new int[256];  // needs initialization

public int CountBits(byte[] data) {
    int count=0;
    foreach (byte d in data) {
        if (d!=0) count+=bitCountInByte[d];
    }
    return count;
}

A  B  AND OR

0  0   0  0
1  1   1  1

0  1   0  1
1  0   0  1

Tadeusz Westawic wrote:

mind is failing in old age