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FFT App #780

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FFT App #780

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drichmond
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Adding current FFT code to replicant repository. This code was developed by @ptpan

There are two configurations:

  • 128x128, producing a 16K FFT
  • 256x256, producing a 64K FFT

drichmond and others added 6 commits May 17, 2022 16:22
@drichmond
Ported Peitian's FFT code to replicant, and moved to apps directory
ffde7b0
@drichmond
Minor changes to FFT code
345e547
@drichmond
Add noalias to top level declaration
76f209a
@drichmond
Modifications to FFT Kernel
79fc0e5 
* Switch to CLANG
* Unroll loading of twiddle factors and FFT computation
  * Had to pointer cast to float * to add attr_remote
* Put data (twiddles, data, output) in cache to avoid cache misses
* Switch to HW Barrier (in 256)
* Put barrier init code outside of kernel measurement tag
@drichmond
Add trace commands
06461ab
@ptpan @drichmond
Minor bug fix in FFT unrolled twiddle factor load (#790)
c35a6c3
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@drichmond @ptpan