| 摘要 |
PURPOSE:To control a data flow in the execution for a recursive procedure at high speed by adding a binary stack instruction circuit for pushing down and popping up a stack memory to a data drive type processor. CONSTITUTION:The binary stack instruction circuit makes signals 100-103 inputs and latches respectively by registers 10-13. Respective input values indicate a data identification number, a push-down/pop-up control, the effective flag of the data and a data value and which stack should be made access is decided according to the data identification number. When the push-down data is inputted, an address value referred by the identification number in an address table 14 is made incremental, the address table is updated and when the activating data for popping-up is inputted, the address value is made decremental and the address table is updated. The address value and the data effective flag and the activating data value for popping-up are outputted and at the time of the push-down processing, an output data value 107 is invalidated according to the value of the data effective flat and at the time of the popping-up processing, it is effective.
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