| 摘要 |
A branch target buffer (BTB) receives, from a processor, a current fetch group address which corresponds to a current fetch group including a plurality of instructions. In response to the current fetch group address resulting in a group hit in the BTB, the BTB provides to the processor a branch target address corresponding to a branch instruction within the current fetch group which is indicated by a control field as valid and predicted taken. The BTB generates the branch target address using an unshared lower order target portion, corresponding to the branch instruction and located within the entry of the BTB which caused the group hit, and one of a shared higher order target portion located within the entry of the BTB which caused the group hit or a higher order portion of the current fetch group address based on a value of the control field.
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