| 摘要 |
PURPOSE:To increase the arithmetic speed by reflecting the change of contents of a condition code register only on the change of contents of a state register of a control part in case the arithmetic contents of an arithmetic part are changed by the contents of the condition code register and producing directly the control signal out of the contents of a state register only. CONSTITUTION:Some processing is applied to the contents of a data register 11 according to the contents of a condition code register 16 and the processed contents of the register 11 are stored in a data register 12. Otherwise some processing is applied to the contents of a data register 12 and these processed contents are stored in the register 13. Under such conditions, a control part 18 reflects the change of contents of the register 16 only on the change of contents of a state register 14 by usually increasing the state number as necessary. Thus the direct control is carried out only by the contents of the register 14 and no AND gate is needed. Tuns it is possible to perform at a high speed such an operation that varies in response to the change of contents of a condition code register that varies according to the arithmetic result, etc. |
