ippsFFTGetSize_C_32fc pBufferSize Question

[Treph]

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

[Gennady_F_Intel]

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]

Hi Gennady,

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

-Treph

[Chao_Y_Intel]

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

thanks,
Chao