| 摘要 |
PURPOSE:To execute a complicated operation by means of a basically same algorithm and to improve a high speed and the reliability of an operation procedure by previously storing an operation result in a storage device. CONSTITUTION:An arithmetic device for special operation 10 consists of a storage device 11, an address input terminal 12 and an output terminal 13. The storage device 11 previously stores the target special operation result in an area designated by an address and executes the operation by calling a storage content with an operation instruction. Namely, the basic operation result such as addition, subtraction, multiplication and division is previously stored in the storage device 11 of the private arithmetic device 10. By inputting the operand to the address input terminal 12 of the arithmetic unit 10 as it is, the storage content is called and is obtained from the output terminal 13. Thus, the arithmetic unit with the high operation speed and with easy constitution can be obtained. |
