An arithmetic device allocation design method of the present invention includes
the steps of: in the case of allocating an arithmetic operation A to the arithmetic
device, comparing an increased circuit area due to a selector to be provided so
as to allocate the operation A to an arithmetic device C to which another arithmetic
operation B has already been allocated and an increased area due to an arithmetic
device D to be created anew to which only the operation A is allocated; when the
increased circuit area due to the selector is smaller, allocating the operation
A to the device C to which the another operation B has already been allocated while
providing the selector; and when the increased circuit area due to the device D
is smaller, creating the device D anew so as to allocate the operation A to the
device D created anew.
