leal和mov的用法:
https://blog.csdn.net/farmwang/article/details/75103220
xorl的用法:
https://blog.csdn.net/linuxheik/article/details/8848768
https://blog.csdn.net/farmwang/article/details/75103220
https://blog.csdn.net/linuxheik/article/details/8848768