Importance

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Abstract

A method and an arithmetic unit for structural arithmetic processing is described. Data words are stored in several registers, each data word having a mark part and an information part. The mark part includes a mark indicating if the register in question being in use or not. The data words are arranged in lists. Each of the lists is stored in a predetermined number of the registers. The mark part of each of the words in the lists stored in the registers is marked in use indicating that one of the lists has at least a part stored in the actual register. The list having a part stored in said actual register includes a list instruction denoting which kind of list it is and the relation between the lists is apparent from the arrangement of the lists in the registers. The registers are controlled by a control device making use of the list instructions belonging to lists stored in the registers to rearrange the lists among the registers and for input/output of register content in accordance with the list instructions.

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First Claim