cpu

			cpu(m)

Moves m onto the CPU, the opposite of gpu. Recurses into structs marked @functor .

			julia> m = Dense(1,2)
Dense(1, 2)

julia> m_gpu = gpu(m)
Dense(1, 2)

julia> typeof(m_gpu.W)
CuArray{Float32, 2}

julia> m_cpu = cpu(m_gpu)
Dense(1, 2)

julia> typeof(m_cpu.W)
Matrix{Float32}