一般CPU的位内存指令

M. Olausson, A. Edman, Dake Liu
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引用次数: 1

摘要

专用集成电路(ASIC)中的嵌入式存储器消耗了大部分芯片面积。不同宽度的数据变量需要比所需更多的内存,因为它们四舍五入到最接近的2次方,即6到8位,11到16位和25到32位。这可以通过添加两位定向的加载和存储指令来避免。存储器仍然可以是8位、16位或32位宽,但是加载和存储可以有任意可变的大小。处理器内部的硬件变化很小,并且在处理器和内存之间添加了一个额外的硬件块。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Bit memory instructions for a general CPU
Embedded memories in an application specific integrated circuit (ASIC) consume most of the chip area. Data variables of different widths require more memory than needed because they are rounded up to nearest power of 2, i.e., 6 to 8 bits, 11 to 16 bits, and 25 to 32 bits. This can be avoided by adding two bit oriented load and store instructions. The memories can still be 8, 16 or 32 bits wide, but the loads and stores can have arbitrary variable sizes. The hardware changes within the processor are small and an extra hardware block between the processor and the memory is added.
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