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March 1978 (vol. 27 no. 3)
pp. 270-275
L.C. Higbie, Cray Research, Inc.
This paper presents a system for parallel operation of functional units in a processor that is under microprogram control. Specifically, for a multiple functional unit computer this new technique allows concurrent operation of the functional units without requiring hardwired instructions. A new interlock system for ordering execution of instructions is also presented. Two applications are shown: one to a three functional unit serial processor and one to an array processor. The mechanism allows holding instructions until the data on which they are to operate are ready and is a microcode version of that used on the IBM 360/91 or on the CDC 6600. This concurrency can be under either hardware, firmware, or software control.
Index Terms:
parallel computation, Microprogramming, overlapped operation
L.C. Higbie, "Overlapped Operation with Microprogramming," IEEE Transactions on Computers, vol. 27, no. 3, pp. 270-275, March 1978, doi:10.1109/TC.1978.1675085
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