Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Treph
Beginner
89 Views

ippsFFTGetSize_C_32fc pBufferSize Question

Hi,

I am using ippsFFTGetSize_C_32fc() to size for a FFT with an order of 19. The pBufferSize calculated is 262,208. However, if I size a FFT with an order of 18, the pBufferSize is 2,097,216. I expect the larger FFT order to calculate a larger pBufferSize. Is this assumption incorrect?

-Treph

0 Kudos
3 Replies
Gennady_F_Intel
Moderator
89 Views

Treph, what version of IPP did you try? Checking this case with the latest 2018 u1 version of IPP, I see the follows results

ffttest.exe
major = 2018
minor = 0
majorBuild = 1
build = 56998
targetCpu = y8
Name = ippSP SSE4.2 (y8)
Version = 2018.0.1 (r56998)
BuildDate = Oct 10 2017
 ..................... FFTOrder == 18 ................
 ..................... FFTOrder == 18, sizeBuffer == 131136 ................

 

testftt.exe
major = 2018
minor = 0
majorBuild = 1
build = 56998
targetCpu = y8
Name = ippSP SSE4.2 (y8)
Version = 2018.0.1 (r56998)
BuildDate = Oct 10 2017
 ..................... FFTOrder == 19 ................
 ..................... FFTOrder == 19, sizeBuffer == 262208 ................
 
--Gennady
Treph
Beginner
89 Views

Hi Gennady,

Thanks for your reply. I checked the ippversion.h file, and the version string is "9.0.3".

-Treph

Chao_Y_Intel
Employee
89 Views

Treph, could you check the new release of IPP? and see if it still an issue for you?

thanks,
Chao

Reply