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    • 7. 发明授权
    • Method and apparatus for improving segmented memory addressing
    • 改善分段存储器寻址的方法和装置
    • US06851040B2
    • 2005-02-01
    • US09930625
    • 2001-08-15
    • H. Peter AnvinAlex KlaiberGuillermo J. RozasParag Gupta
    • H. Peter AnvinAlex KlaiberGuillermo J. RozasParag Gupta
    • G06F9/26G06F9/30G06F9/355G06F12/00
    • G06F9/355G06F9/30101
    • A method and apparatus for breaking complex X86 segment operations and segmented memory addressing into explicit sub-operations so that they may be exposed to compiler or translator-based optimizations. A method includes providing a first segment selector for deriving a linear address of a segment descriptor in a first descriptor table and providing a second segment selector for deriving a linear address of a segment descriptor in a second descriptor table. The method also includes attempting an access of the first descriptor table to derive a segment descriptor, and if the access of the first descriptor table fails, attempting an access of the second descriptor table to derive a segment descriptor. The method also includes storing a derived segment descriptor from a successful attempted access in a descriptor register.
    • 一种用于将复杂X86段操作和分段存储器寻址分解为显式子操作的方法和装置,以便将其暴露于基于编译器或基于翻译器的优化。 一种方法包括提供第一段选择器,用于在第一描述符表中导出段描述符的线性地址,并提供第二段选择器,用于在第二描述符表中导出段描述符的线性地址。 该方法还包括尝试访问第一描述符表以导出段描述符,并且如果第一描述符表的访问失败,则尝试访问第二描述符表以导出段描述符。 该方法还包括在描述符寄存器中存储来自成功尝试访问的导出段描述符。