微处理器的指令集架构（Instruction Set Architecture）常见种类如下： 复杂指令集运算（Complex Instruction Set Computing，CISC）；精简指令集运算（Reduced Instruction Set Computing，RISC） ；显式并行指令集运算（Explicitly Parallel Instruction Computing，EPIC）；超长指令字指令集运算（VLIW）
仿真还常常解释来宾vm的指令(与虚拟化相比，此处来宾的指令集架构必须与主机相同)。
Emulation also commonly interprets the instructions of the guest VM (compared to virtualization, where the instruction set architecture of the guests must be the same as the host).
如果您没有可以生成代码来利用底层处理器架构和指令集的编译器，那么最快的机器也将是无用的。
If you don't have a compiler that can produce code to take advantage of the underlying processor architecture and instruction set, then the fastest machines will be useless.
由于SPU指令集并不与现有的CPU架构直接相关，因此我们为GCC和binutils编写了一个新的后端程序。
Since the SPU instruction set is not directly related to an existing CPU architecture, a new back end was written for both GCC and binutils.
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