How to understand obfuscated IP codes?

It could be a nightmare. If you just want to view it as blackbox then run a testbench of your own with your inputs and reference outputs. Many designers have no mercy about readability or comments or documentation.

Alternatively post this on DSPRelated and I guarantee you will get 89 replies at least from the 5 robots there. Seriously

Kaz

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Depends on how complex. Look at the generated RTL perhaps.....

Wouldn't hold out much hope. On anything sufficiently complex you can have a full description of the low-level implementation, but not enough context to give full understanding of what is actually being implemented.

e.g. Take this description - what does it do?

There is a single bit register, and it gets XORed with the value that is fr om a 1-bit x 256 table, indexed by the 8-bit input, After that the 8-bit nu mber plus the bit is used to index another 10-bit x 512 table, containing s eemingly random values, to generate the final output value.

Am Mittwoch, 9. September 2015 14:11:48 UTC+2 schrieb Sumathigokul:

I assume you paid money to get this code. I would request documentation and read it.

For obfuscated code it is really hard to tell a