x86程序集以编程方式确定endianess(x86 assembly to programmatically determine endianess)

x86程序集以编程方式确定endianess(x86 assembly to programmatically determine endianess)

据我所知，英特尔x86是小端。 但是，如何编写汇编以编程方式确定处理器的字节顺序？

I understand that Intel x86 is little endian. However, how would I write assembly to programmatically determine the endianess of a processor?

最满意答案

存储一个具有不同值的单词，每个单词的两个字节（例如0x0001 ）。 从同一地址加载一个字节，并检查它匹配的原始字的哪个字节。

Store a word that has different values for each of it’s two bytes (0x0001, for example). Load a byte from the same address and check to see which byte of the original word it matches.