xaddl decl 32位汇编代码

	__asm__ __volatile__(
		"mov	$-1,	%0	\n"
	"	lock			\n"
	"	xaddl	%0,	%1	\n"
	"	decl	%0		\n"
	:	"=r"(Value), "+m"(*pAddend)
	:
	:	"cc");
#endif

　　https://www.cnblogs.com/findumars/p/6995637.html