最低有效位mips [英] Least significant bit mips

问题描述

如何在 Mips 中更改寄存器中的最低有效位?
在另一篇文章如何在 MIPS 中获得 LSB 位?，它看到了如何得到它，但我想改变它.

How can i change least significant bit in a register in Mips?
In another post How to get LSB bit in MIPS? it saws how to get it but i want to change it.

推荐答案

下面一行应该做:

xori $t0, $s0, 1

解释:$s0 中的内容包含 0 和 1，而立即数在 LSB 中包含 0 和 1.当 LSB 为 0 时，与 1 异或输出 1.每当为 1 时，与 1 异或输出 0.其余位如果为 1，则输出 1，如果为 0，则输出 0，因为它们与 0 异或，从而保持它们的状态.

Explained: the contents in $s0 contains zeros and ones, while the immediate value has zeros and a one in the LSB. Whenever the LSB is 0, it is xored with 1 and outputs a 1. Whenever it is 1, it is xored with 1 and outputs a 0. The remaining bits will output a 1 if they are 1 and a 0 if they are 0 because they are being xored with 0, thus preserving their state.

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