[ethmac] CRC Magic number! How to figure out c704dd7b?

[fievel@netrd.iii.org.tw]

Dear All:
I need the information or documentation about how to figure out the 
CRC magic number,c704dd7b.
I've searched AMD Site that Allan said befor.
However, I didn't get any documentation to reference.
Could Allan or someone tell me that where I can get more information 
about CRC magic.
I've searched Google, But still nothing at all.
Therefore, I come here for helping.
All I want to know is how to figure out it?
Thanks!

Have a nice day
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