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    • 4. 发明申请
    • Method, apparatus, and computer program product for selectively prohibiting speculative conditional branch execution
    • 用于选择性地禁止推测性条件分支执行的方法,装置和计算机程序产品
    • US20060149944A1
    • 2006-07-06
    • US11002522
    • 2004-12-02
    • Lee EisenFrancis O'Connell
    • Lee EisenFrancis O'Connell
    • G06F9/44
    • G06F9/3842G06F9/30058G06F9/30181G06F9/3844G06F9/3851G06F9/3867
    • A method, apparatus, and computer program product are disclosed for selectively prohibiting speculative conditional branch execution. A particular type of conditional branch instruction is selected. An indication is stored within each instruction that is the particular type of conditional branch instruction. A processor then fetches a first instruction from code that is to be executed. A determination is made regarding whether the first instruction includes the indication. In response to determining that the instruction includes the indication: speculative execution of the first instruction is prohibited, an actual location to which the first instruction will branch is resolved, and execution of the code is branched to the actual location. In response to determining that the instruction does not include the indication, the first instruction is speculatively executed.
    • 公开了用于选择性地禁止推测性条件分支执行的方法,装置和计算机程序产品。 选择特定类型的条件分支指令。 指示存储在作为条件分支指令的特定类型的每个指令内。 然后处理器从要执行的代码中获取第一条指令。 确定第一指令是否包括指示。 响应于确定指令包括指示:禁止第一指令的推测执行,第一指令将分支的实际位置被解析,并且代码的执行被分支到实际位置。 响应于确定指令不包括指示,推测性地执行第一指令。