Alexander Gerstenberger

Integer floor for negative input yields wrong result

3

**Describe the bug** Currently, we need a `ceildiv` operation to compute the sequence lengths after convolution for sequence models. The `ceildiv` operation is implemented as ``` ceildiv(a, b) := -floordiv(-a,...

Onnx: ceildiv yields wrong result during conversion

12

We had one particular problem when converting a Conformer acoustic model from TensorFlow to ONNX: Calculating the sequence lengths after convolution resulted in wrong calculations on ONNX side. The issue...

Stateless Graphs

9

Currently we are working on converting LMs from TensorFlow to Onnx. As Onnx does not allow persistent state between session runs, in contrast to TF, we need to manage the...

task eval broken for PyTorch engine

1

The task eval is currently broken for the `backend=torch`. The call https://github.com/rwth-i6/returnn/blob/e1762d85a17ebf71a16e6ce333068e231f763abb/returnn/__main__.py#L563-L570 is incompatible with the torch engine's signature of https://github.com/rwth-i6/returnn/blob/e1762d85a17ebf71a16e6ce333068e231f763abb/returnn/torch/engine.py#L642 Is the eval task intended to be used with...