docs: function(n, x) {
      if (n === 7) {
          return x.lo & 0xFF;
      }
      var bits = (7 - n) * 8;
      if (bits >= 32) { //faster than >= 32
          return (x.hi >>> (bits - 32)) & 0xFF;
      }
  
      var bitsOff32 = 32 - bits,
          toMoveDown = this.hi << bitsOff32 >>> bitsOff32;
      return (x.lo >>> bits | (toMoveDown << bitsOff32)) & 0xFF;
  
  }