在SPU上，大部分指令都可以在寄存器上进行操作，就仿佛它们分别包含多个无关的值一样(因此可以对多个数据项执行一条指令)。

On the SPUs, most instructions can operate on registers as if they contained multiple, independent values (thus the single instruction acting on multiple data items).

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每个操作都是并行地针对多个数据元素进行，这些数据分别存储在一些128位的寄存器中。

Every operation works on multiple data elements in parallel, stored in 128-bit registers.

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检查点机制的状态检查操作就是将进程在该运行时刻的用户级寄存器上下文和用户数据段保存到检查点文件中。

Statecheck operation of checkpoint preserves the user register context and user data segment of process checkpointed at this time to checkpoint file.

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