Fix typos in cute docs

[irasin]

No description provided.

[ccecka]

Thanks!

[irasin]

Hi, @ccecka, in this example, I think it should be <3:3, (2,4):(1,8)> instead of <3:4, (2,4):(1,8)> , but I can't modify the image.
https://github.com/NVIDIA/cutlass/blob/main/media/images/cute/divide2.png

[ccecka]

You're right about that one too, thanks!

Here's the edited image to include in this MR so we can keep everything together.

[ccecka]

Looks like that last line describing divide2.png also has an error.

It should read

Note that the first mode of each mode of the result is the sublayout (3,(2,4)):(177,(13,2)) and is precisely the result we would have received if we had applied composition instead of logical_divide.

[irasin]

Found another mistake in https://github.com/NVIDIA/cutlass/blob/main/media/docs/cute/03_tensor.md#owning-tensors

The example of make_tensor_like should be

Tensor rmem_4x8_pad = make_tensor<float>(Shape <_4, _8>{},
                                         Stride<_2,_32>{});
Tensor rmem_4x8_like = make_tensor_like(rmem_4x8_pad);

and according to the order of the Stride<_2,_32>{}, the printed output should be

rmem_4x8_pad  : ptr[32b](0x7ff1c8fff920) o (_4,_8):(_2,_32)
rmem_4x8_like : ptr[32b](0x7f4158fffc60) o (_4,_8):(_1,_4)

[ccecka]

Gah, good finds. Can you edit those to:

Tensor rmem_4x8_pad = make_tensor<float>(Shape < _4,_8>{},
                                         Stride<_32,_2>{});
Tensor rmem_4x8_like = make_tensor_like(rmem_4x8_pad);

and

rmem_4x8_pad  : ptr[32b](0x7ff1c8fff920) o (_4,_8):(_32,_2)
rmem_4x8_like : ptr[32b](0x7f4158fffc60) o (_4,_8):(_8,_1)

Thanks for your help!

[irasin]

Got it. I am a beginner in cutlass/cute. I will read all cute docs, fix the typos and submit them in this MR.

[ccecka]

EDIT: Let's actually keep the references to and uses of composition(Tensor, Layout) the way they are and just add an implementation for completeness purposes.

[ccecka]

For explanation purposes, I would rather keep it as the simple composition. There are other examples that use a *_divide.

[hwu36]

@ccecka , @thakkarV , more work needed in this pr?

[ccecka]

@irasin Are you happy with this PR?

This is a good time to add in the composition(Tensor, Layout) to tensor.hpp?

[irasin]

Sorry for the lack of updates.
Since I have some new work recently, I have to temporarily suspend my study of cute.
Please review and merge this PR if everything's OK.

@ccecka , About the composition(Tensor, Layout), I don't know what your expected implementation should be. Maybe you can add it in someother PR?

[ccecka]

Ok @hwu36, let's merge this now and I'll deal with the missing function in another review.

Thanks for your help!