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Support new AbstractFFTs.AdjointStyle trait for FFT and DCT plans #249

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merged 8 commits into from
Sep 4, 2023
Merged

Support new AbstractFFTs.AdjointStyle trait for FFT and DCT plans #249

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3c727ab
Support new AdjointStyle trait
gaurav-arya Jul 30, 2023
1662489
Remove extraneous test deps
gaurav-arya Jul 30, 2023
b700223
Add AbstractFFTs compat
gaurav-arya Jul 30, 2023
6a90c92
Only run new adjoint tests on FFTW
gaurav-arya Jul 30, 2023
6da1939
Revert test/Project.toml change
gaurav-arya Aug 2, 2023
4662374
Remove R2RAdjointStyle.(accidentally included)
gaurav-arya Aug 2, 2023
38f72b4
Use small p for consistency
gaurav-arya Sep 4, 2023
969315a
Fix typo
gaurav-arya Sep 4, 2023
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2 changes: 1 addition & 1 deletion Project.toml
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Expand Up @@ -11,7 +11,7 @@ Preferences = "21216c6a-2e73-6563-6e65-726566657250"
Reexport = "189a3867-3050-52da-a836-e630ba90ab69"

[compat]
AbstractFFTs = "1.0"
AbstractFFTs = "1.5"
FFTW_jll = "3.3.9"
MKL_jll = "2019.0.117, 2020, 2021, 2022, 2023"
Preferences = "1.2"
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2 changes: 2 additions & 0 deletions src/dct.jl
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Expand Up @@ -171,3 +171,5 @@ end
mul!(Array{T}(undef, p.plan.osz), p, copy(x)) # need copy to preserve input

*(p::DCTPlan{T,K,true}, x::StridedArray{T}) where {T,K} = mul!(x, p, x)

AbstractFFTs.AdjointStyle(::DCTPlan) = AbstractFFTs.UnitaryAdjointStyle()
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6 changes: 6 additions & 0 deletions src/fft.jl
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Expand Up @@ -1049,3 +1049,9 @@ function *(p::r2rFFTWPlan{T,K,true}, x::StridedArray{T}) where {T,K}
unsafe_execute!(p, x, x)
return x
end

#######################################################################

AbstractFFTs.AdjointStyle(::cFFTWPlan) = AbstractFFTs.FFTAdjointStyle()
AbstractFFTs.AdjointStyle(::rFFTWPlan{T, FORWARD}) where {T} = AbstractFFTs.RFFTAdjointStyle()
AbstractFFTs.AdjointStyle(p::rFFTWPlan{T, BACKWARD}) where {T} = AbstractFFTs.IRFFTAdjointStyle(p.osz[first(p.region)])
24 changes: 24 additions & 0 deletions test/runtests.jl
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Expand Up @@ -577,3 +577,27 @@ end
end
end
end

@testset "DCT adjoints" begin
# only test on FFTW because MKL is missing functionality
if FFTW.get_provider() == "fftw"
for x in (randn(3), randn(4), randn(3, 4), randn(3, 4, 5))
y = randn(size(x))
N = ndims(x)
for dims in unique((1, 1:N, N))
for P in (plan_dct(x, dims), plan_idct(x, dims))
AbstractFFTs.TestUtils.test_plan_adjoint(P, x)
end
end
end
end
end

@testset "AbstractFFTs FFT backend tests" begin
# note this also tests adjoint functionality for FFT plans
# only test on FFTW because MKL is missing functionality
if FFTW.get_provider() == "fftw"
AbstractFFTs.TestUtils.test_complex_ffts(Array)
AbstractFFTs.TestUtils.test_real_ffts(Array; copy_input=true)
end
end
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