HLS4ML Sequential Model Support

[Gekow, Alex]

Hello, 

My name is Alex Gekow, I am a graduate student studying machine learning applications in the ATLAS trigger. Both myself and colleague Haider Abidi cc'd in this email have been in contact before about the HLS4ML package. It has been extraordinary useful thus far, and we are at a point where we are interested in testing sequential models on FPGA. I understand that models such as RNN/LSTM/GRU are currently in development and would like to inquire as to the state of these developments. 

If there is work to be done on this front, we are interested in contributing to the synthesis of sequential models and would be happy to talk more. 

Regards,

Alex Gekow