return a >>> LEV_LPOS | b >>> (LEV_HPOS-LEV_LBITS);
int lev = a >>> LEV_LPOS | b >>> (LEV_HPOS-LEV_LBITS); return lev;
    private final int LEVEL(int node) {        int a = table[node*__node_size + offset__llev] & LEV_LMASK;        int b = table[node*__node_size + offset__hlev] & LEV_HMASK;        return a >>> LEV_LPOS | b >>> (LEV_HPOS-LEV_LBITS);    }