Shift 10101111...10101100 by 3

     10101111...10101100 >> 3
     ||||||||   |||||
      \\\\\\\\   \\\\\
       \\\\\\\\   \\\\\
        ||||||||   |||||
     00010101111...10101

     11111111...11111111 << (NUM_BITS-3)
                     |||
       _____________///
      ///
     |||
     11100000...00000000

     00010101111...10101
   | 11100000...00000000
     -------------------
     11110101111...10101