added tensor index selector

[dcslin]

No description provided.

[dcslin]

Hi @joddiy , regarding Conv padding, i understand that the missing part is the index selection, e.g.tensor1[:,:,1:,1:], which is added in this PR.

Let me know if further info is required.

@nudles , FYI

[joddiy]

thanks, shicong, I'll try it ASAP.

[joddiy]

Hi, @dcslin, for the backward of CNN, I guess I should firstly pad the dy as its shape same with the shape before index selection. So, I need a function that can add one column and row at the end or start of the matrix. For example, for "SAME_UPPER" mode, and output shape of [3,3,32,32], I need to pad one column and one row at the end of the dy to make the shape as [3,3,32,32].

[dcslin]

Hi, @dcslin, for the backward of CNN, I guess I should firstly pad the dy as its shape same with the shape before index selection. So, I need a function that can add one column and row at the end or start of the matrix. For example, for "SAME_UPPER" mode, and output shape of [3,3,32,32], I need to pad one column and one row at the end of the dy to make the shape as [3,3,32,32].

hi could it be done in reverse way? add extra padding and make it symmetrical, and trim off one column by using the selection[].

[joddiy]

Hi, @dcslin, for the backward of CNN, I guess I should firstly pad the dy as its shape same with the shape before index selection. So, I need a function that can add one column and row at the end or start of the matrix. For example, for "SAME_UPPER" mode, and output shape of [3,3,32,32], I need to pad one column and one row at the end of the dy to make the shape as [3,3,32,32].

hi could it be done in reverse way? add extra padding and make it symmetrical, and trim off one column by using the selection[].

sure, and how to add extra padding? can use singa.add_column and add_row?

[dcslin]

this is ready for merge, which is required in ONNX