首页>
外国专利>
Global history branch prediction updating responsive to taken branches
Global history branch prediction updating responsive to taken branches
展开▼
机译:全局历史分支预测响应于已采取的分支而更新
展开▼
页面导航
摘要
著录项
相似文献
摘要
A system and method are provided for updating a global history prediction record in a microprocessor system using pipelined instruction processing. The method accepts a microprocessor instruction of consecutive operations, including a conditional branch operation with an associated branch address, at a first stage in a pipelined microprocessor execution process. A global history record (GHR) of conditional branch resolutions and predictions is accessed and hashed with the branch address, creating a first hash result. The first hash result is used to access an indexed branch history table (BHT) of branch direction counts and the BHT is used to make a branch prediction. If the branch prediction being “taken”, the current GHR value is left-shifted and hashed with the branch address, creating a second hash result which is used in creating an updated GHR.
展开▼