内联汇编_把a值赋给b的汇编代码

int main(int argc, char *argv[])

{

    int a = 10, b;

    __asm__("movl %1, %%eax\n\t"

            "movl %%eax, %0\n\t"

            :"=r"(b)

            :"r"(a)

            :"%eax"

            );

    printf("ret: %d, %d\n", a, b);

    return 0;

}