https://tomsworkspace.github.io/2021/02/27/GCC%E8%87%AA%E5%B8%A6%E7%9A%84%E4%B8%80%E4%BA%9Bbuiltin%E5%86%85%E5%BB%BA%E5%87%BD%E6%95%B0/ 一些GCC自带的内建(bulitin)函数的接口及实现
https://tomsworkspace.github.io/2021/02/27/GCC%E8%87%AA%E5%B8%A6%E7%9A%84%E4%B8%80%E4%BA%9Bbuiltin%E5%86%85%E5%BB%BA%E5%87%BD%E6%95%B0/
一些GCC自带的内建(bulitin)函数的接口及实现