| 摘要 |
PURPOSE:To prevent the lowering of operation speed when an arithmetic result is zero by providing a holding means which is set when the arithmetic result of an arithmetic means is not zero, and hold a set state until the operation of all digits is completed and executing the zero discrimination of the arithmetic result by referring to the holding means. CONSTITUTION:When subtraction is executed materially by decimal addition/ subtraction arithmetic processing and moreover the result of it is zero, it is necessary to modify the code of the result into a positive code and when the arithmetic result by an arithmetic means 1 is any number except zero every time when an operation is executed by an arithmetic means 1, the effect of it is accumulate-held by a holding means 2. Then, the holding means 2 is referred to at the end of the operation of all digits and the holding means 2 is not set, that is, all the digits are zero, the code is modified into the positive code. Thus, the subtraction is executed materially by the decimal addition/ subtraction arithmetic processing and moreover even when the result of it is zero, the lowering of operation speed is prevented. |
