Boots – shoes – and leggings
Patent
1987-07-31
1990-01-16
Eng, David Y.
Boots, shoes, and leggings
3642434, 3642613, 3642617, G06F 938, G06F 1300
Patent
active
048947725
ABSTRACT:
A look ahead fetch system for a pipelined digital computer is provided for predicting in advance of decoding the outcome of a branch instruction. The system includes a branch cache having a plurality of associative sets for storing branch target addresses indexed by the lowest significant bits of the corresponding branch instruction's address. A memory for storing a coupling bit vector indicative for each branch cache set of whether the set contains a corresponding branch target address. The coupling bit vector is used to guide prediction logic to the correct branch cache sets for qualifying the entry there contained having an index corresponding to a fetched instruction's address for formulating a prediction of the next instruction to be processed.
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Eng David Y.
Prime Computer Inc.
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