int test1(){	int n;		asm volatile(		"movl $0, %%eax\n"		"movl $20, %%ecx\n"		"1:\n"		"incl %%eax\n"		"loop 1b\n"		: "=a" (n)		: "c" (0)); 	if(n != 20)		return 1;	return 0;} int test2(){	int n;		asm volatile(		"movl $20, %%eax\n"		"movl $20, %%ecx\n"		"1:\n"		"decl %%eax\n"		"loopnz 1b\n"		: "=a" (n)		: "c" (0)); 	if(n != 0)		return 1;	return 0;} int test3(){	int n;		asm volatile(		"movl $20, %%eax\n"		"movl $20, %%ecx\n"		"1:\n"		"decl %%eax\n"		"loopz 1b\n"		: "=a" (n)		: "c" (0)); 	if(n != 1)		return 1;	return 0;} intmain(void){	return test1() ||		test2() ||		test3();}