#if i386_HOST_ARCH || x86_64_HOST_ARCH
__asm__ __volatile__ ("" : : : "memory");
#elif powerpc_HOST_ARCH
__asm__ __volatile__ ("lwsync" : : : "memory");
#if i386_HOST_ARCH || x86_64_HOST_ARCH
__asm__ __volatile__ ("" : : : "memory");
#elif powerpc_HOST_ARCH
__asm__ __volatile__ ("lwsync" : : : "memory");