指令长度是指一个指令中包含的2进制代码的位数。
... instruction length counter 指令长度计数器 instruction length 指令长度 instruction level language 指令级语言 ...
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对486指令系统的指令长度、指令的使用频率、指令的编码特点进行了深入分析，提出了加快译码速度的设计方案。
Deeply studied the length of the 486 instructions, frequency in using of the instructions, the character of the instruction encoder. Brought out the design idea to speedup decoding.
实际上，内存地址对于任何指令格式可以使用的最大长度只有24位！
In fact, the largest length available for a memory address to any instruction format is only 24 bits!
由于内存系统和指令集设计的特性，用于复制内存的最佳通用例程的执行速度通常比用于复制特定长度的代码慢。
Because of the nature of memory systems and instruction-set designs, the best generic routine to copy memory is rarely as fast as code written to copy a particular length.
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