FLIP_EM
if (FLIP_EM(*freeblocks) & (0x80000000 >> i++))
if (FLIP_EM(*freeblocks) & (0x80000000 >> i++))
if (FLIP_EM(*freeblocks) & (0x80000000 >> i++))
if (FLIP_EM(*freeblocks) & (0x80000000 >> i++))
*freeblocks &= FLIP_EM(~index);
if (FLIP_EM(*freeblocks) & (0x80000000 >> i)) {