#include <stdio.h>
#include <stdint.h>
 
int main(void) {
    uint32_t ret = 0;
    __asm (
        "mov $0xFF00, %%ecx\n"
        "mov $0x0F0F, %%eax\n"
        "andn %%ecx, %%eax, %%ecx\n"
        "mov %%ecx, %0\n"
      : "=r" (ret));
    printf("%08X\n", ret);
    return 0;
}