ARB_CURNODES
curctds = ARB_CURNODES(&CONSTVSD(tdgstclust32, tdgst)->ctdtree);
curctds = ARB_CURNODES(&CONSTVSD(tdgstclust64, tdgst)->ctdtree);
if (i >= ARB_CURNODES(ctd64tree)
ARB_CURNODES(head) -= 1; \
ARB_CURNODES(head) += 1; \