code: def shuffle_vector(self, vector1, vector2, mask, name=''):
          
          instr = instructions.ShuffleVector(self.block, vector1, vector2, mask,
                                             name=name)
          self._insert(instr)
          return instr
docs: Constructs a permutation of elements from *vector1* and *vector2*.
          Returns a new vector in the same length of *mask*.
  
          * *vector1* and *vector2* must have the same element type.
          * *mask* must be a constant vector of integer types.