topic DFTI_FORWARD_SCALE Do not work on x64 in Intel® oneAPI Math Kernel Library

DFTI_FORWARD_SCALE Do not work on x64

yu__yiming — Sat, 06 Jun 2020 12:27:48 GMT

Hi,

I am using the DftiSetValue API to set FFT gain. However I find it does not work as the same as the api reference.

The reference says " the data type of the scale factor is the same precision as the value for DFTI_PRECISION. " I find it should always be Double even I do the Single FFT.

While I change to intel64 system, this api doesn't work whatever I set. When I call this api to set the DFTI_FORWARD_SCALE, I can't get the correct result when doing the FFT. The result of the FFT always be 0. I call the DftiGetValue to get the DFTI_FORWARD_SCALE back and I find it is 0 on both Double or Single FFT.

Have anyone met the problem ?

Yiming

Re:DFTI_FORWARD_SCALE Do not work on x64

Gennady_F_Intel — Tue, 07 Jul 2020 15:30:20 GMT

the duplicated topic with https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/DFTI-FORWARD-SCALE-Do-not-work-on-x64/m-p/1185872#M29593

Re: Re:DFTI_FORWARD_SCALE Do not work on x64

Gennady_F_Intel — Tue, 07 Jul 2020 15:39:10 GMT

https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/DFT-FORWARD-SCALE-do-not-work/m-p/1186027#M29596