Though that code works too for FixedSizeArrays
> On 17 Nov. 2016, at 8:53 am, Sheehan Olver <dlfivefi...@gmail.com> wrote: > > Oh wait, I was referring to Vec from FixedSizeArrays.jl , not from SIMD > > >> On 16 Nov. 2016, at 6:39 pm, Gunnar Farnebäck <gun...@lysator.liu.se >> <mailto:gun...@lysator.liu.se>> wrote: >> >> Is this what you're looking for? >> >> julia> using SIMD >> >> julia> v = rand(2, 5) >> 2×5 Array{Float64,2}: >> 0.391832 0.785861 0.352291 0.874891 0.874593 >> 0.697768 0.51637 0.711525 0.400077 0.266559 >> >> julia> w = reinterpret(Vec{2, Float64}, vec(v)) >> 5-element Array{SIMD.Vec{2,Float64},1}: >> Float64⟨0.391832,0.697768⟩ >> Float64⟨0.785861,0.51637⟩ >> Float64⟨0.352291,0.711525⟩ >> Float64⟨0.874891,0.400077⟩ >> Float64⟨0.874593,0.266559⟩ >> >> >> Den onsdag 16 november 2016 kl. 05:52:14 UTC+1 skrev Sheehan Olver: >> >> In some high performance code I want to convert an 2 x n `Matrix{Float64}` >> to a n long `Matrix{Vec{2,Float64}}`with no memory allocation (both types >> will store memory in the same order). The following works: >> >> v=rand(2,100) >> w=unsafe_wrap(Vector{Vec{2,Float64}}, >> reinterpret(Ptr{Vec{2,Float64}},pointer(v)), >> size(pts,1),true) >> >> The variable v is a throw away variable, however, and as I understand it, >> the way its written the memory for w will be freed as soon as v is no longer >> referenced. Is there any way to tell the garbage collector to not collect v? >
