L2EXTSPERSUM
sword = extno >> L2EXTSPERSUM;
sword = extno >> L2EXTSPERSUM;
extno = (sword << L2EXTSPERSUM) + rem;
extno = (sword << L2EXTSPERSUM) + rem;
extno = (sword << L2EXTSPERSUM) + rem;
extno = (sword << L2EXTSPERSUM) + rem;
sword = extno >> L2EXTSPERSUM;
sword = extno >> L2EXTSPERSUM;
sword = extno >> L2EXTSPERSUM;