torch.logaddexp2
torch.logaddexp2(input, other, *, out=None) -> Tensor
Logarithm of the sum of exponentiations of the inputs in base-2.
Calculates pointwise \log_2\left(2^x + 2^y\right). See
   "torch.logaddexp()" for more details.
Parameters:
      * input (Tensor) -- the input tensor.
  * **other** (*Tensor*) -- the second input tensor

Keyword Arguments:
      out (Tensor, optional) -- the output tensor.