G - Physics – 06 – F
Patent
G - Physics
06
F
354/230.87
G06F 9/38 (2006.01)
Patent
CA 1226958
Abstract of the Disclosure A central processor unit for a digital data processing system that processes prefetched instructions including a condi- tional branch instruction. The processor includes a fetch unit that has separate portions, one that retrieves operands and the other that retrieves instructions. When the fetch unit fetches a conditional branch instruction, it may continue to prefetch "branch not taken" instructions using the instruction fetch portion. The fetch unit initially uses the operand fetch portion to prefetch "branch taken" instructions. If it is determined that the branch is not taken, the prefetch operation is aborted, otherwise the pre- fetch operation is allowed to continue to provide the next instruc- tion used by the processor.
481772
Bruckert William F.
Derosa John A. Jr.
Fossum Tryggve
Glackemeyer Richard E.
Helenius Allan E.
Digital Equipment Corporation
Smart & Biggar
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