Use style dispatch in broadcast(!)#393
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maleadt merged 3 commits intoJuliaGPU:masterfrom Mar 15, 2022
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maleadt
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| @inline function Base.copyto!(dest::BroadcastGPUArray, bc::Broadcasted{Nothing}) | ||
| @inline function Base.materialize!(::Style, dest, bc::Broadcasted) where {Style<:AbstractGPUArrayStyle} | ||
| return _copyto!(dest, instantiate(Broadcasted{Style}(bc.f, bc.args, axes(dest)))) |
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If this, and the original Base implementation at https://github.com/JuliaLang/julia/blob/17775537232de5b12a38b257e402756b6df55386/base/broadcast.jl#L871, creates a Broadcasted{<:AbstractGPUArrayStyle}, why doesn't the copyto!(::AbstractArray, Broadcasted{<:AbstractGPUArrayStyle}) implementation below suffice?
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Base won't create a Broadcasted{<:AbstractGPUArrayStyle}, bc's stype is kept there.
So we need to create Broadcasted{<:AbstractGPUArrayStyle} ourself.
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The error should be unrelated? |
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Style-based dispatch would be easier to extend by external array wrapper package. (Reusing more code)
JuliaArrays/StructArrays.jl#215
OffsetArraysshould be simiar, but IIRC@cartesianidx(dest, i)doesn't support 1d offset axes.This PR also wants to move
backendtoAdapt.jlJuliaGPU/Adapt.jl#50 to keep dependence lightweight.