> Hi @FrozenGene ,
> I agree that different strategies should be available to the auto-tuner. See 
> if the solution proposed is good enough for you (at least as a temporary 
> work-around). For Armv7-A or NCHW, nothing changes, we follow exactly the 
> previous path.
> 
> For Armv8-A and NHWC we don't convert during the legalization step, but 
> during the `_alter_conv2d_layout` pass. The only difference now is that the 
> offset contribution will be added after the convolution instead than before.
> 
> I agree that a better solution, where the legalization changes depending on 
> the strategy, would be better. However, I don't think the legalization step 
> has got enough information to know the strategy (for now).
> 
> What do you think?

I think it is ok.

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