Ref
内联汇编语法:https://gcc.gnu.org/onlinedocs/gcc/Using-Assembly-Language-with-C.html
gccindex:https://gcc.gnu.org/onlinedocs/gcc/index.html
内联汇编语法:https://gcc.gnu.org/onlinedocs/gcc/Using-Assembly-Language-with-C.html
gccindex:https://gcc.gnu.org/onlinedocs/gcc/index.html