XRELEASE
__asm __volatile(XRELEASE MPLOCKED OP \
__asm __volatile(XRELEASE MPLOCKED "cmpxchgl %2,%1; " \
__asm __volatile(XRELEASE MPLOCKED "cmpxchgq %2,%1; " \
__asm __volatile(XRELEASE MPLOCKED "xaddl %0,%1; " \
__asm __volatile(XRELEASE MPLOCKED "xaddq %0,%1; " \