| 摘要 |
PURPOSE:To realize the stack mechanism of a high-level language computer efficiently by exercising control so that data required for arithmetic processing resides in a register stack in every internal state without fail. CONSTITUTION:A multiple stack device is equipped with a means 1 of prescribed internal states, resister stacks RS21-RS23 and RS41-RS43 controlled on FIFO basis, significant-state display means 31-33 for respective blocks, an address specifying pointer 40 for the blocks, a main storage device 6 stored with data from the RS on FIFO basis, and address pointers AP71 and AP72 which correspond to the internal states of up-to-date significant data area of the device 6. Then, a control means 8, when each RS has no empty block as a result of push operation, expels the oldest block of the RS to the device 6 by the indication of the AP and, when the RS obtains an empty block as a result of hop operation, fetches data from the device 6 to the oldest empty block. Therefore, data required for arithmetic control resides in the RS in every internal state without fail. |
