PowerPC 使用了加载/存储（也成为 RISC）指令集，这意味着访问主存的惟一 时机就是将内存加载到寄存器或将寄存器中的内容复制到内存中时。

The PowerPC uses a load/store (also called RISC) instruction set, which means that the only time it accesses main memory is for loading into registers or copying a register to memory.

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PPE用载入和存储指令访问主存储器(有效地址空间)，可以在主存储器与内容可以缓存的私有寄存器文件之间移动数据。

The PPE accesses main storage (the effective-address space) with load and store instructions that move data between main storage and a private register file, the contents of which may be cached.

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SPE 用直接内存访问（DMA）命令访问主存储器，可以在主存储器与称为本地库或本地存储（LS）的私有本地内存之间移动数据和指令。

The SPEs access main storage with direct memory access (DMA) commands that move data and instructions between main storage and a private local memory, called a local store or local storage (LS).

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