leftt  = (leftt << 1) | ((leftt >>> 31) & 1);

        for ( round = 0; round < 8; ++round )  {
            work   = (right << 28) | (right >>> 4);
            work  ^= keys[keysi++];
            fval   = SP7[ work         & 0x0000003f ];
            fval  |= SP5[(work >>>  8) & 0x0000003f ];
            fval  |= SP3[(work >>> 16) & 0x0000003f ];
            fval  |= SP1[(work >>> 24) & 0x0000003f ];