[C7x]Stream engine copy padding example

user4836286

Expert 1300 points

Hello,

I'm implementing 3x3 filter need copy padding with Stream engine. Could you share example code?

Best regards,

Wilson.

over 5 years ago

0 Rishabh Garg over 5 years ago

TI__Guru 55685 points

Hi Wilson,

You can download TI_C7X_DSP_TRAINING_00.05.zip from mySecure software (same link as release download).

Regards,

Rishabh

0 user4836286 over 5 years ago in reply to Rishabh Garg

Expert 1300 points

Hi Rishabh,

Which sample code can I reference?

Best regards,

Wilson.

0 Rishabh Garg over 5 years ago in reply to user4836286

TI__Guru 55685 points

Hi WIlson,

You can see TI_C7X_DSP_TRAINING_00.05/c7x_dsp_code_samples/c7x_sample_2.html.

Regards,

Rishabh

0 user4836286 over 5 years ago in reply to Rishabh Garg

Expert 1300 points

Rishabh,

c7x_sample2 looks like using zero padding. I can' find copy code. Is there any trick using vector permutation and stream engine?

Best regards,

Wilson.

0 Shyam Jagannathan over 5 years ago in reply to user4836286

TI__Genius 10355 points

Yes you can use either the vector permute operation to duplicate elements or use streaming engine element-duplication feature. Look at streaming engine chapter for examples on element duplication.

Regards,
Shyam

0 user4836286 over 5 years ago in reply to Shyam Jagannathan

Expert 1300 points

Shyam,

I've implemented copy padding with __permute(). Thanks for advice. I hope more C7x example code available soon.

Best regards,

Wilson.

0 Shyam Jagannathan over 5 years ago in reply to user4836286

TI__Genius 10355 points

Thanks for the feedback Wilson,

There are a few more highly optimized kernels under "TI_C7X_DSP_TRAINING_00.05/c7x_dsp_code_samples_adv" folder, but I have to write some documentation on each of them. Planning to have it by next release sometime in 1Q20.

We will surely try to add more examples to the training material.

Regards,

Shyam

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[C7x]Stream engine copy padding example