New Operation: Fill_Tile_Pad ; Op to fill tile padding with a specific value

[yugi957]

Ticket

#16393

Problem description

Need to create an op that fills any tile padding with a particular value

What's changed

Only parallelizing across dims that aren't the last 2 for now. Simply iterate through the space between the logical shape and padded shape and fill with the respective value.

Checklist

• Post commit CI passes: https://github.com/tenstorrent/tt-metal/actions/runs/12835147070

[github-actions]

⚠️ Clang-Tidy found issue(s) with the introduced code (1/1)

[sjameelTT]

Rename the PR title to something more descriptive

[github-actions]

⚠️ Clang-Tidy found issue(s) with the introduced code (1/1)

[bbradelTT]

You should probably make the github actions error go away (either by changing the code or maybe adding a pragma).

[ntarafdar]

A few comments. Overall great PR!

[ntarafdar]

Instead of TT constants for tile height can you get it from the tensor, tile shape, @TT-BrianLiu , can you point us to the appropriate tile shape api.

[bbradelTT]

You'd need to pass in an optional Tile parameter and plumb it through. You can look at struct Matmul's output_tile parameter in ttnn/cpp/ttnn/operations/matmul/device/matmul_op.hpp

I think it'd be better not to block this PR for adding that functionality.

[yugi957]

Hi all, I'm trying to be more specific with what name we bind the op to for users, and these options came up:

• fill_tile_padding
• • I'd like to go with this for now as this addresses the fact we are filling some kind of padding, but specifically implicit padding from tile alignment
• fill_tile_alignment
• • I think this option is for if we decide it makes most sense not to consider alignment padding padding at all

and certainly open to more suggestions

[bbradelTT]

Hi all, I'm trying to be more specific with what name we bind the op to for users, and these options came up:

• fill_tile_padding
• • I'd like to go with this for now as this addresses the fact we are filling some kind of padding, but specifically implicit padding from tile alignment
• fill_tile_alignment
• • I think this option is for if we decide it makes most sense not to consider alignment padding padding at all

and certainly open to more suggestions

A few more specific names could be something like

• fill_implicit_tile_padding
• fill_implicit_tile_alignment
• fill_tile_alignment_padding (which I think you mentioned as well)

Anything with more words would probably be too long, although even with this length, most people will stay away from it.

I don't have a preference.

@ayerofieiev-tt you probably have the strongest opinion. What's your preference?

[yugi957]

• fill_implicit_tile_padding
  I like this one personally!

[sjameelTT]

For your next PR use these to get tile_shape/face_shape

const auto& tile_shape = input_tensor.get_tensor_spec().tile().get_tile_shape();
const auto& face_shape = input_tensor.get_tensor_spec().tile().get_face_shape();