HAVE_OP
#define NEED_OP(x) if (unlikely(!HAVE_OP(x))) goto output_overrun
if (likely(HAVE_OP(t + 15))) {
if (likely(HAVE_IP(6) && HAVE_OP(4))) {
#define NEED_OP(x) if (unlikely(!HAVE_OP(x))) goto output_overrun
if (likely(HAVE_IP(t + 15) && HAVE_OP(t + 15))) {