code: def BVV(value, size=None, **kwargs):
      
  
      if type(value) in (bytes, str):
          if type(value) is str:
              l.warning("BVV value is a unicode string, encoding as utf-8")
              value = value.encode('utf-8')
  
          if size is None:
              size = len(value)*8
          elif type(size) is not int:
              raise TypeError("Bitvector size  must be either absent (implicit) or an integer")
          elif size != len(value)*8:
              raise ClaripyValueError('string/size mismatch for BVV creation')
  
          value = int(binascii.hexlify(value), 16) if value != b"" else 0
  
      elif size is None or (type(value) is not int and value is not None):
          raise TypeError('BVV() takes either an integer value and a size or a string of bytes')
  
      # ensure the 0 <= value < (1 << size)
      # FIXME hack to handle None which is used for an Empty Strided Interval (ESI)
      if value is not None:
          value &= (1 << size) -1
  
      if not kwargs:
          try: return _bvv_cache[(value, size)]
          except KeyError: pass
  
      result = BV('BVV', (value, size), length=size, **kwargs)
      _bvv_cache[(value, size)] = result
      return result
docs: Creates a bit-vector value (i.e., a concrete value).
  
      :param value:   The value. Either an integer or a string. If it's a string, it will be interpreted as the bytes of
                      a big-endian constant.
      :param size:    The size (in bits) of the bit-vector. Optional if you provide a string, required for an integer.
  
      :returns:       A BV object representing this value.