code: def sar(computation: BaseComputation) -> None:
      
      shift_length, value = computation.stack_pop(num_items=2, type_hint=constants.UINT256)
      value = unsigned_to_signed(value)
  
      if shift_length >= 256:
          result = 0 if value >= 0 else constants.UINT_255_NEGATIVE_ONE
      else:
          result = (value >> shift_length) & constants.UINT_256_MAX
  
      computation.stack_push(result)
docs: Arithmetic bitwise right shift