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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _op_generic_HAdd(self, args):
 """ Halving add, for some ARM NEON instructions. """

        components = []
        for a, b in self.vector_args(args):
            if self.is_signed:
                a = a.sign_extend(self._vector_size)
                b = b.sign_extend(self._vector_size)
            else:
                a = a.zero_extend(self._vector_size)
                b = b.zero_extend(self._vector_size)
            components.append((a + b)[self._vector_size:1])
        return claripy.Concat(*components)