CLEARMASK
Int32 lo = ftab[sb] & CLEARMASK;
Int32 hi = (ftab[sb+1] & CLEARMASK) - 1;
copyStart[j] = ftab[(j << 8) + ss] & CLEARMASK;
copyEnd [j] = (ftab[(j << 8) + ss + 1] & CLEARMASK) - 1;
for (j = ftab[ss << 8] & CLEARMASK; j < copyStart[ss]; j++) {
for (j = (ftab[(ss+1) << 8] & CLEARMASK) - 1; j > copyEnd[ss]; j--) {
Int32 bbStart = ftab[ss << 8] & CLEARMASK;
Int32 bbSize = (ftab[(ss+1) << 8] & CLEARMASK) - bbStart;