RBX_VAL
if (flags & RBX_VAL) {
rctlsys_rblk_xfrm(oblk, NULL, oval, RBX_FROM_BLK | RBX_VAL);
rctlsys_rblk_xfrm(nblk, krde, nval, RBX_TO_BLK | RBX_VAL | RBX_CTL);
rctlsys_rblk_xfrm(nblk, NULL, nval, RBX_FROM_BLK | RBX_VAL);
rctlsys_rblk_xfrm(oblk, NULL, oval, RBX_FROM_BLK | RBX_VAL);
if (flags & RBX_VAL) {
RBX_FROM_BLK | RBX_VAL);