发明名称 |
METHOD AND SYSTEM FOR MITIGATING LOOKAHEAD BRANCH PREDICTION LATENCY WITH BRANCH PRESENCE PREDICTION AT THE TIME OF INSTRUCTION FETCHING |
摘要 |
System and method for mitigating lookahead branch prediction latency with branch presence prediction at the time of instruction fetching. An exemplary embodiment includes a method for mitigating lookahead branch prediction latency, the method including receiving an instruction address in an instruction cache for fetching instructions in the microprocessor pipeline, receiving the instruction address in a branch presence predictor coupled to the microprocessor pipeline, and releasing instructions extracted from the instruction cache after determining that a branch prediction is available or unlikely to occur for instructions identified as potential predictable branches by the branch presence prediction.
|
申请公布号 |
US2009204797(A1) |
申请公布日期 |
2009.08.13 |
申请号 |
US20080029543 |
申请日期 |
2008.02.12 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
BONANNO JAMES J.;HUTTON DAVID S.;PRASKY BRIAN R.;SAPORITO ANTHONY |
分类号 |
G06F9/32 |
主分类号 |
G06F9/32 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|