Branch predictor search qualification using stream length prediction
A computer-implemented method includes determining, by a stream-based index accelerator predictor of a processor, a predicted stream length between an instruction address and a taken branch ending an instruction stream. A first-level branch predictor of a hierarchical asynchronous lookahead branch p...
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| Main Authors | , , , |
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| Format | Patent |
| Language | Chinese English |
| Published |
01.07.2018
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| Subjects | |
| Online Access | Get full text |
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| Abstract | A computer-implemented method includes determining, by a stream-based index accelerator predictor of a processor, a predicted stream length between an instruction address and a taken branch ending an instruction stream. A first-level branch predictor of a hierarchical asynchronous lookahead branch predictor of the processor is searched for a branch prediction in one or more entries in a search range bounded by the instruction address and the predicted stream length. A search of a second-level branch predictor of the hierarchical asynchronous lookahead branch predictor is triggered based on failing to locate the branch prediction in the search range. |
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| AbstractList | A computer-implemented method includes determining, by a stream-based index accelerator predictor of a processor, a predicted stream length between an instruction address and a taken branch ending an instruction stream. A first-level branch predictor of a hierarchical asynchronous lookahead branch predictor of the processor is searched for a branch prediction in one or more entries in a search range bounded by the instruction address and the predicted stream length. A search of a second-level branch predictor of the hierarchical asynchronous lookahead branch predictor is triggered based on failing to locate the branch prediction in the search range. |
| Author | COLLURA, ADAM B LIPETZ, DANIEL BONANNO, JAMES J CADIGAN, MICHAEL J |
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| Notes | Application Number: TW20176138706 |
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| Snippet | A computer-implemented method includes determining, by a stream-based index accelerator predictor of a processor, a predicted stream length between an... |
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| SubjectTerms | CALCULATING COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING PHYSICS |
| Title | Branch predictor search qualification using stream length prediction |
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