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    • 1. 发明申请
    • System and method for executing conditional branch instructions in a data processor
    • 用于在数据处理器中执行条件转移指令的系统和方法
    • US20080010443A1
    • 2008-01-10
    • US11900978
    • 2007-09-14
    • Mark HomewoodGary VondranGeoffrey BrownPaolo Faraboschi
    • Mark HomewoodGary VondranGeoffrey BrownPaolo Faraboschi
    • G06F9/00
    • G06F9/30058G06F9/3885
    • There is disclosed a data processor having a clustered architecture that comprises at least one branching cluster, at least one non-branching cluster and remote conditional branching control circuitry. Each of the clusters is capable of computing branch conditions, though only the branching cluster is operable to perform branch address computations. The remote conditional branching control circuitry, which is associated with each of the clusters, is operable in response to sensing a conditional branch instruction in a non-branching cluster to (i) cause the branching cluster to compute a branch address and a next program counter address, (ii) cause the non-branching cluster to compute a branch condition, and (iii) communicate the computed branch condition from the non-branching cluster to the branching cluster. The data processor then uses the computed branch condition to select one of the branch address or the next program counter address.
    • 公开了一种数据处理器,其具有包括至少一个分支簇,至少一个非分支簇和远程条件分支控制电路的集群架构。 每个集群都能够计算分支条件,尽管只有分支集群可用于执行分支地址计算。 响应于感测非分支集群中的条件分支指令,可以操作与每个集群相关联的远程条件分支控制电路,以(i)使分支集群计算分支地址和下一个程序计数器 (ii)使非分支集群计算分支条件,并且(iii)将所计算的分支条件从非分支集群传递到分支集群。 然后,数据处理器使用计算出的分支条件来选择分支地址或下一个程序计数器地址之一。