NOSYNC
sync = NOSYNC;
memset(lc->sync_bits, (sync == NOSYNC) ? -1 : 0, bitset_size);
lc->sync_count = (sync == NOSYNC) ? region_count : 0;
if (lc->sync == NOSYNC)
DMEMIT("%ssync ", lc->sync == NOSYNC ? "no" : ""); \