实际上应该复制这些设备的寄存器的值。

You should actually duplicate the device's registers.

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如果这样做，counter的值必须先复制到寄存器，递减，然后对其内存更新。

If you do, the value of the counter must first be copied on to a register, decremented, and then updated to its memory.

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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.

youdao

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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