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    • 10. 发明授权
    • Store-to-load forwarding mechanism for processor runahead mode operation
    • 存储到负载转发机制,用于处理器跑头模式操作
    • US08639886B2
    • 2014-01-28
    • US12364984
    • 2009-02-03
    • Gordon BellAnil KrishnaSrinivasan Ramani
    • Gordon BellAnil KrishnaSrinivasan Ramani
    • G06F12/08
    • G06F12/0875G06F9/3826G06F9/3834G06F9/3857
    • A system and method to optimize runahead operation for a processor without use of a separate explicit runahead cache structure. Rather than simply dropping store instructions in a processor runahead mode, store instructions write their results in an existing processor store queue, although store instructions are not allowed to update processor caches and system memory. Use of the store queue during runahead mode to hold store instruction results allows more recent runahead load instructions to search retired store queue entries in the store queue for matching addresses to utilize data from the retired, but still searchable, store instructions. Retired store instructions could be either runahead store instructions retired, or retired store instructions that executed before entering runahead mode.
    • 一种用于在不使用单独的显式跑道缓存结构的情况下优化处理器的跑步头操作的系统和方法。 尽管存储指令不允许更新处理器缓存和系统存储器,但存储指令将其结果写入现有的处理器存储队列中,而不是简单地将存储指令放在处理器跑头模式中。 在跑步模式期间使用存储队列来保存存储指令结果允许更多的最新跑步加载指令来搜索存储队列中的退出存储队列条目以匹配地址以利用来自已退休但仍可搜索的存储指令的数据。 退休存储指令可以是退出存储指令退出,或退出存储指令,在进入排头模式之前执行。