SliceNdLayer now uses GatherLayer to get the slices.#635

Merged

albertz merged 14 commits intorwth-i6:masterfrom

robin-p-schmitt:schmitt-slicend-use-gatherlayer

Sep 16, 2021

Commits on Sep 16, 2021

SliceNdLayer now uses GatherLayer to get the slices. The start argument of SliceNdLayer can now be of any shape and not only of shape (B,) as before.
robin-p-schmitt
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Quick fixes, reintroduced the min_size option and allow size=None in order to use the max possible size.
robin-p-schmitt
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SliceNdLayer: Changed some lines to their previous version
robin-p-schmitt
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SliceNdLayer get_out_data_from_opts: removed batch argument from DimensionTag because it led to an error
robin-p-schmitt
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SliceNdLayer: added comment explaining the possible gradient issue of the padding
robin-p-schmitt
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SliceNdLayer: create new dimension tag in get_out_data_from_opts and reuse it in __init__
robin-p-schmitt
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SliceNdLayer: small changes
robin-p-schmitt
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dyn_size can now have shapes other than [B]
robin-p-schmitt
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Added dyn_size in case that seq_lens is None
robin-p-schmitt
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Changed hard-coded index to time_dim_axis and added assert
robin-p-schmitt
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Added test for case that start is of shape [B] in loop and of shape [B,T] when optimized out of the loop
robin-p-schmitt
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Small fix for compatibility in test
robin-p-schmitt
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Added blank lines
robin-p-schmitt
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Added min_size compatibility and small beam fix
robin-p-schmitt
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