The count value is put into % ecx as it is needed by rep prefix.

因为rep前缀需要count值，所以将它放入% ecx中。

youdao

Then at line C8, the instance pointer is dereferenced and stored in ecx.

然后，在c8行处，instance指针被解除引用并存储到ecx。

youdao

Unless this is done, GCC assumes that % eax and % ecx are free, and it may decide to use them for storing other data.

在完成这一步之前，gcc假设% eax和% ecx是自由的，它可能决定将它们用作存储其它的数据。

youdao