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bug: fft #522

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ThomasPiellard opened this issue Jul 21, 2024 · 0 comments · Fixed by #523
Closed

bug: fft #522

ThomasPiellard opened this issue Jul 21, 2024 · 0 comments · Fixed by #523

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@ThomasPiellard
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ThomasPiellard commented Jul 21, 2024 •
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Description

This sample causes a panic:

a := make([]fr.Element, 4)
f := fft.NewDomain(4, fft.WithoutPrecompute())
f.FFTInverse(a, fft.DIF)

Possible Fix

twiddlesInv = make([][]fr.Element, nbStages-twiddlesStartStage) -> nbStages=2, twiddlesStartStage=3 here, the indices should be adjusted

Your Environment

  • gnark-crypto version used: 0.13.0
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@ThomasPiellard