For the stack to be portable (that is, so it will run on processors of both types), it will have to decide whether or not to do this reordering, typically at compile time.

• 为了使栈具有可移植性（也就是说，能正确运行于两种类型的处理器上），它必须决定是否做这种字节重排，这种决定通常在编译时做出。