#include<stdio.h>

int main(){
	int x = 5;
/*	
	asm(
		"mov $1, %rax \n"
		"mov $31, %rbx \n"
		"int $0x80"
	);
*/
	printf("x = %d\n", x);

	asm("mov $42, %%rax; mov %%eax, %0" : : "r"(x));
	printf("x = %d\n", x);

	return 0;
}