__crc32 give different results between Hightech Tricore GCC 4.6.3.0 and Hightech Tricore GCC 4.6.6.1

[Hedi]

On a project i'm working on, i have to change the compiler from 4.6.6.1 to 4.6.3.0.

I discovered that both compilers call the CRC32 instruction, but i get different result for the same data.

Any ideas are welcome, where should i look ? has anyone encountered this kind of behavior before ?

Thanks in advance.

[µC_Wrangler]

The truth is almost always in the source code - can you share a snippet?

How do you know the data is the same?  Are you comparing hex files?

[agostonrobert · Accepted solution]

Hi, the instruction crc32 before 4.6.4.0 has been implemented according the specification V1.0 D9 2010-11,
but in a later version of the manual V1.0 D12 the specification has changed.
There is an assembler option --warn-crc that will point you to the relevant assembler source lines that you may want to review.