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AM5718: DDR3 bit swapping

Part Number: AM5718

I hand previously raised  a query in this regards

based on this I happen to swap bit 0, bit 8, bit 16 & bit 24

I happen to come across this thread

e2e.ti.com/.../655828 and Application note www.ti.com/.../spraci2a.pdf

""Databit swappingis allowedto simplifyrouting,providedthe bits swappedare withinthe samebytegroup.However,the primebit, the lowestnumberedbit in eachbyte,mustbe connectedto thecorrespondingbit on the SDRAMwithoutswapping.Thatis, bit 0, bit 8, bit16,and so forth.Also,the DM and DQS bits mustnot be swapped.""

Is it mandatory to maintain bit0 , bit8 , bit16, bit24 positions as in evaluation board?? or these bits can be subjected to swapping within their byte lanes. pls confirm.

Regards

Rakesh M