DFT generation with 1 sample per cycle fails

I changed the project version from 1.5.5 to 1.8.0 to get around a Java issue like this related to sbt not starting:
sbt/sbt#6925

Now the generator runs, but not if I select n=6, k=0 (1 sample per cycle). With n=6, k=1 it works fine. Or with n=6, k=6 it also works fine. See below for the NoSuchElementException:

sbt "run -n 6 -k 0 -hw complex fixedpoint 16 0 -dualramcontrol -o sgen_dft.v dft"
[info] welcome to sbt 1.8.0 (Homebrew Java 19.0.1)
[info] loading project definition from /Users/<user>/git/SGen/project
[info] loading settings for project root from build.sbt ...
[info] set current project to SGen (in build file:/Users/<user>/git/SGen/)
[info] running (fork) Main -n 6 -k 0 -hw complex fixedpoint 16 0 -dualramcontrol -o sgen_dft.v dft
[info]    _____ ______          SGen v.0.2 - A Generator of Streaming Hardware
[info]   / ___// ____/__  ____  Department of Computer Science, ETH Zurich, Switzerland
[info]   \__ \/ / __/ _ \/ __ \
[info]  ___/ / /_/ /  __/ / / / Copyright (C) 2020-2021 François Serre (serref@inf.ethz.ch)
[info] /____/\____/\___/_/ /_/  https://github.com/fserre/sgen
[info] This program comes with ABSOLUTELY NO WARRANTY. This is free software, and you are welcome to redistribute it and to modify it under the terms of the GNU GPLv3+ <http://gnu.org/licenses/gpl.html>.
[error] Exception in thread "main" java.util.NoSuchElementException: empty.head
[error] 	at scala.collection.immutable.Vector.head(Vector.scala:277)
[error] 	at Main$.r$1(Main.scala:62)
[error] 	at Main$.main(Main.scala:153)
[error] 	at Main.main(Main.scala)
[error] Nonzero exit code returned from runner: 1
[error] (Compile / run) Nonzero exit code returned from runner: 1
[error] Total time: 1 s, completed Dec 12, 2022, 3:17:50 PM

Maybe it's unrelated to the sbt version and you just don't support a fully-pipelined version that accepts exactly 1 complex sample per cycle?

[LightCannon]

Maybe it's unrelated to the sbt version and you just don't support a fully-pipelined version that accepts exactly 1 complex sample per cycle?

Hello. Have you reached any update regarding this? I cannot generate a single input DFT

I found that this particular FFT generator simply doesn't support a 1-sample-per-cycle use case. But, it's a very high quality generator for all other settings. It compares favorably with Spiral, for example (I did a benchmark on utilization).

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On Wed, Feb 21, 2024 at 12:15 PM LightCannon ***@***.***> wrote: Maybe it's unrelated to the sbt version and you just don't support a fully-pipelined version that accepts exactly 1 complex sample per cycle? Hello. Have you reached any update regarding this? I cannot generate a single input DFT — Reply to this email directly, view it on GitHub <#8 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AOICLWRYHYNMWZBSZ2HXYJ3YUZIUJAVCNFSM6AAAAAAS4QXKNKVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMYTSNJXHAZDSMBWGE> . You are receiving this because you authored the thread.Message ID: ***@***.***>