DSPLIB C64x+: missing objects in LIB

Pascal COINCE

Prodigy 200 points

Other Parts Discussed in Thread: OMAP-L137

Hello,

I'm trying to compile a project with the function "DSP_fft16x16r_i" from DSPLIB C64x+ v3.1.0.0.

I've put the right paths in compilation options and added "dsplib.ae64P" in linker (ELF output).

The linker complains that it misses DSP_fft16x16r_i symbol.

I tried the example supplied with the lib, but in the example it uses DSP_fft16x16, which doesn't seem to be the optimized version (moreover there's a warning saying the function is implicitly declared). If I modify to DSP_fft16x16_i, it doesn't link (but no more warning by the compiler).

What's wrong ?

Regards

over 13 years ago

0 Karl Wechsler over 13 years ago

TI__Mastermind 20805 points

Which device are you using? We need to move this post to the correct forum since this is not a BIOS issue.

Regards,
-Karl-

0 Pascal COINCE over 13 years ago in reply to Karl Wechsler

Prodigy 200 points

I'm using an OMAP-L137, developping on the DSP.C674x.

I posted in the BIOS forum, as requested in the DSPLIB Release Notes.

Regards

0 Yimin Zhang over 13 years ago in reply to Pascal COINCE

TI__Intellectual 1690 points

Hi,

The linear assembly implementation DSP_fft16x16r is fully optimized, which should be included in the object library. The intrinsic C kernel DSP_fft16x16r_i is not as optimized, and not included in the library. The same applies to DSP_fft16x16. Is there a reason why you want to use the intrinsic C kernel?

regards,

Yimin

0 Pascal COINCE over 13 years ago in reply to Yimin Zhang

Prodigy 200 points

Hi,

I'm using DSP_fft16x16r_i instead of DSP_fft16x16r because:

- the API reference mentions DSP_fft16x16r_i, not DSP_fft16x16r

- when including "dsplib.h", the compiler finds the prototype of DSP_fft16x16r_i, not DSP_fft16x16r

- I understood that the optimized C version was more optimized than the linear assembly version, that doesn't use parallelism.

Which function should I use ?

Regards

0 Yimin Zhang over 13 years ago in reply to Pascal COINCE

TI__Intellectual 1690 points

Hi,

You should use DSP_fft16x16r, which is the more optimzed version. I just ckecked the API reference and dsplib.h. They pointed to the intrinsic kernel by mistake. We will fixed it in the next release. Sorry for the confusion and inconvenience.

regards,

Yimin

0 John Emilian over 13 years ago in reply to Yimin Zhang

Prodigy 80 points

I just ran into this problem as well! I'm glad I found this thread before going home for the weekend!

Processors

Processors forum

DSPLIB C64x+: missing objects in LIB