Function atomic_fetchadd_int

freebsd/i386/include/atomic.h:238–250

* Atomically add the value of v to the integer pointed to by p and return * the previous value of *p. */

 * the previous value of *p.
 */
static __inline u_int
atomic_fetchadd_int(volatile u_int *p, u_int v)
{

	__asm __volatile(
	"	" MPLOCKED "		"
	"	xaddl	%0,%1 ;		"
	"# atomic_fetchadd_int"
	: "+r" (v),			/* 0 */
	  "+m" (*p)			/* 1 */
	: : "cc");
	return (v);
}

static __inline int
atomic_testandset_int(volatile u_int *p, u_int v)