| 摘要 |
PURPOSE:To efficiently perform a shift operation, by performing the shift operation for a list data expressed in a list form by using a barrel shift circuit and an adder circuit. CONSTITUTION:The list data outputted selectively at an input selection circuit 21 is separated to an address part which represents the node position of the list data, and a value part which represents reference to a data value. And the data Ad of the address part is inputted to the barrel shift circuit 22, and the data VD of the value part becomes a part of the output RD of a shift device 3 as it is. Furthermore, the data AD inputted to the circuit 22 is outputted after being shifted in a right and a left directions corresponding to a shift selection signal SHC, however, the forefront value of the data AD is added/subtracted by 1 at the adder circuit 23 at the time of CDR shift and RCDR shift, then, it is outputted.
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