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fixup
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mcabbott committed Dec 31, 2022
1 parent 4f55dc8 commit 20c7d63
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Showing 2 changed files with 7 additions and 7 deletions.
7 changes: 3 additions & 4 deletions src/onehot.jl
Original file line number Diff line number Diff line change
Expand Up @@ -101,18 +101,17 @@ function _onehotbatch(data, labels, default)
end

function onehotbatch(data::AbstractArray{<:Integer}, labels::AbstractUnitRange{<:Integer})
# lo, hi = extrema(data) # fails on Julia 1.6
lo, hi = minimum(data), maximum(data)
lo, hi = extrema(data) # fails on Julia 1.6
lo < first(labels) && error("Value $lo not found in labels")
hi > last(labels) && error("Value $hi not found in labels")
offset = 1 - first(labels)
indices = UInt32.(data .+ offset)
return OneHotArray(indices, length(labels))
end

# That bounds check with extrema synchronises on GPU, much slower than rest of the function,
# hence add a special method, with a less helpful error message:
function onehotbatch(data::AbstractGPUArray{<:Integer}, labels::AbstractUnitRange{<:Integer})
offset = 1 - first(labels)
# The bounds check with extrema synchronises, often 10x slower than rest of the function.
indices = map(data) do datum
checkbounds(labels, datum)
UInt32(datum + offset)
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7 changes: 4 additions & 3 deletions test/gpu.jl
Original file line number Diff line number Diff line change
Expand Up @@ -30,10 +30,11 @@ end
y1 = onehotbatch([1, 3, 0, 2], 0:9) |> cu
y2 = onehotbatch([1, 3, 0, 2] |> cu, 0:9)
@test y1.indices == y2.indices
@test_broken y1 == y2
@test_broken y1 == y2 # issue 28

@test_throws Exception onehotbatch([1, 3, 0, 2] |> cu, 1:10)
@test_throws Exception onehotbatch([1, 3, 0, 2] |> cu, -2:2)
# These do fail, but not in a way that @test_throws understands
@test_skip @test_throws Exception onehotbatch([1, 3, 0, 2] |> cu, 1:10)
@test_skip @test_throws Exception onehotbatch([1, 3, 0, 2] |> cu, -2:2)
end

@testset "onecold gpu" begin
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