### AND (&)
    100
    101
    ---
    100
### OR (|)
    100
    101
    ---
    101
### XOR (^)
    100
    101
    ---
    001
### NOT (~)
    101
    ---
    010
### Shift (>>) and (<<)
    0001_0111 >> 3 = 0000_0010
    0001_0111 << 3 = 1011_1000
# Arithmetic
### Multiply x by 2<sup>k</sup>
    x << k
    Example: 5 * 8 = 5 << 3
### Divide x by 2<sup>k</sup>
    x >> k
    Example: 20 / 16 = 20 >> 4
### Mod by 2<sup>k</sup>
   x & (2<sup>k</sup>-1)

    Example: 20 % 16 = 20 & 15
### Is x power of 2?
    (x != 0) && (x & (x - 1)) == 0