在这种模式中，指令本身就包含了数据加载的源地址。
In this mode, the instruction itself contains the address from which to load the data.
结果是指令集中包含大部分算术操作和转移操作，但是并不包含PPE中的那种内核模式指令。
As a consequence, the instruction set contains mostly arithmetic and branch operations but none that resemble kernel mode instructions of the PPE.
几乎所有指令都可用于两种模式。
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