IQmath atan2 pipeline performance

SNBANIK

Intellectual 645 points

I am not getting the documented pipelined performance for atan2 (or other functions like sqrt). (SPRUGG9)

This is what I tried --

for (i=0; col <SizeX; i++)
{

phiRadQ15[i] = _IQ15atan2(xRFxd[i],yRFxd[i]);

}

I get 118 cycles per point which is the non pipelined performace. (processor used: c6455)

I tried #pragma MUST_ITERATE. No difference in cycle count.

Can someone please tell me what I need to do to get the pipelined performace?

Thanks,

SBanik

over 14 years ago

0 RandyP over 14 years ago

TI__Guru* 84110 points

You need the inline source header files. Because these contain TI Intellectual Proprietary, these files are released only under Non-Disclosure Agreement. We are trying to figure out what, if any, procedure can be offered on the E2E Forum for obtaining these source files while protecting our IP. Please know there there is considerable internal discussion about the tradeoffs of protecting this IP vs. providing the best application code for our customers like you.

If you have access to a TI sales person who can assist you with getting this code, that would be the best approach. If not, please standby until we can come up with more information.

0 RandyP over 14 years ago in reply to RandyP

TI__Guru* 84110 points

SBanik,

Late-breaking news for the IQMath source files. You can now request access to the source files at http://focus.ti.com/docs/toolsw/folders/print/sprc542.html .

Regards,
RandyP

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0 Estian Malan over 14 years ago in reply to RandyP

Intellectual 635 points

Hi.

Will this include the previously mentioned inline source header files?

Estian.

0 RandyP over 14 years ago in reply to Estian Malan

TI__Guru* 84110 points

Yes

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IQmath atan2 pipeline performance