Recurrent network support.

[rodrigo-breia-lopes]

Are recurrent networks, such as RNN, LSTM, GRU, supported by the fork?

If so, what are the main considerations to be had when approaching an implementation of these with the FINN+ Framework?

[iksnagreb]

No, recurrent networks are currently not supported, at least not out of the box. There are both practical (no one fully implemented all the operators) as well as conceptual (how to handle the state/feedback) concerns. If you have any ideas/insights on these or want to contribute something, suggestions are welcome.

[fpjentzsch]

See also these papers about LSTM support in FINN (not FINN+ specific):

• Old paper: FINN-L: Library Extensions and Design Trade-off Analysis for Variable Precision LSTM Networks on FPGAs
• Very recent paper: FINN-GL: Generalized Mixed-Precision Extensions for FPGA-Accelerated LSTMs

[rodrigo-breia-lopes]

@fpjentzsch @iksnagreb
Thank you both for your attention and subsequent replies! A few days later I messaged one of the authors of the FINN-GL (PhD Shashwat Khandelwal), which was very kind to offer me a very thorough explanation on how to approach the problem.

Thank you!