Two boolean arrays are not more compact than one signed `int8` array. But since you'd have to make bool masks from such an array anyways to do anything useful, you might as well pass the bool masks.
I think this example shows that you don't need any special infrastructure from numpy. I don't think there is going to be much appetite to expand our API in this direction. On Thu, Apr 27, 2023 at 9:13 AM <jmsa...@gmail.com> wrote: > > Ideally if there is an overflow in an array operation I'd like to > produce an "overflow array" that's the same size as the result array, but > with the values +1 if it's a positive overflow or -1 if it's a negative > overflow. > > Alternatively, if boolean arrays are a much more compact memory footprint, > then return two overflow arrays, one positive and one negative. > > Use case: > > X = ... something ... > Y = ... something else ... > Z, ovpos, ovneg = multiply_check_ov(X,Y) > if ovpos.any(): > np.iinfo(Z.dtype).max > if ovneg.any(): > # uh oh, something we didn't expect, so raise an error > _______________________________________________ > NumPy-Discussion mailing list -- numpy-discussion@python.org > To unsubscribe send an email to numpy-discussion-le...@python.org > https://mail.python.org/mailman3/lists/numpy-discussion.python.org/ > Member address: robert.k...@gmail.com > -- Robert Kern
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