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A fast algorithm for division by constant divisors is presented. The method has proved very useful implemented as microcode on a binary machine, and can be adapted directly into hardware. The mathematical foundations of the algorithm are presented as well as some performance measures.

The foundations of capability schemes are critically examined. The context free utilization of capabilities once acquired is shown to be inconsistent with both least privilege norm and information flow requirements. An enhanced Capability Vector mechanism which pre-confines the set of capabilities with which a given capability can be combined is proposed.… (More)

An algorithm is presented for the assignment of instruction addresses and formats under the following conditions: (1) the length of the instruction varies as a function of the distance of the instruction from its target; (2) there exists an optimality criterion which implies some preferential choices subject to the addressing constraints. This may be, for… (More)

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