My program will give wrong result when I run，if I use -o3 optimization

cz h

As the subject ，if I use -o3 optimization build my project，the program will give wrong result，but if I break it after the program compute the result，I can get right result， there are several interrupt in my prog am，and my program was built based ondsp/bios，what's the problem with my program，could some one give me some advice，thanks

over 10 years ago

0 RandyP over 10 years ago

TI__Guru* 84110 points

CZ,

Please go to TI.com and search for "C6000 optimization" (no quotes). You will find a workshop and several documents (online and pdf format). These will have good discussions to help you with understanding how to optimize your DSP code and get good results.

The most common problem is not using the 'volatile' keyword for variables. You can read about this in the materials from the search I mentioned above and also in the C Compiler Users Guide for your version of the compiler.

Regards,
RandyP

0 Sivaraj Kuppuraj over 10 years ago

TI__Mastermind 35645 points

Hi,

Thanks for your post.

There are c64x core optimization workshops and online materials, compiler optimization techniques to enhance performance and reduce code size. Kindly check the below TI wiki resources:

http://processors.wiki.ti.com/index.php/TMS320C6000_DSP_Optimization_Workshop

https://processors.wiki.ti.com/images/e/e8/C64plus_cgt_overview.pdf

http://processors.wiki.ti.com/index.php/Optimization_Techniques_for_the_TI_C6000_Compiler

http://processors.wiki.ti.com/index.php/Debug_versus_Optimization_Tradeoff

Thanks & regards,

Sivaraj K

-------------------------------------------------------------------------------------------------------

Please click the Verify Answer button on this post if it answers your question.

-------------------------------------------------------------------------------------------------------

Processors

Processors forum

My program will give wrong result when I run，if I use -o3 optimization