Posted on May 17, 2011 at 11:32While debugging my project I have discovered the following behavior which does not make sense to me. I am hoping that maybe someone out there may see the reason for the problem and could give me a hint or a solution.
The following code sniped reads like this in C…
m_nValue += m_nValue;
and like this in the .lst file (listing).
ldw rro,#@m_nValue
addw @m_nValue+2,2(rr0)
adcw @m_nValue,(rr0)
m_nValue is a static long variable and it is also #pragma REGISTER_FILE m_nValue
For example, if I initialize m_nValue with 0 the output after the += function is not 0 as suggested. The output can be anywhere in the 32bit range. The output value is always the same for a compilation. If I change code and recompile the output variable is different than before.
My compile options look like this:
-m$(MODEL) -mfp-on -I$(INCDIR) -O1 -Wall -c -Wa,-alhd=$*.lis
I am using the MODEL: medium.
Any suggestions are highly appreciated.
