1. A computation device comprising: a first data storage unit that stores operation target data; an operation processing unit that executes an operation by using data; a data permutation unit that selects indicated data among the operation target data stored in the first data storage unit and data operated by the operation processing unit, provides predetermined delay for data that has received a delay indication among the indicated data based on a parameter, does not delay data that has not received a delay indication, executes permutation of indicated data based on a parameter, and outputs data operated in the operation processing unit and operation result data of the operation processing unit; and second data storage unit that stores the operation result data output by the data permutation unit, wherein the data permutation unit comprises: an input data selection unit that receives data, selecting indicated data, and outputting the data to the second data storage unit or the operation processing unit; a multi-port storage unit that receives data from the input data selection unit, providing delay for data received a delay indication based on the parameter, not delaying data not received a delay indication, executing an indicated permutation based on the parameter, and outputting the data from a predetermined output port; and a permutation control unit that controls the input data selection unit and the multi-port storage unit.