SmoothQuant original conversion script

This converts an OPT or Bloom 🤗 transformers model to a "smoothed" version, as described in SmoothQuant: Accurate and Efficient Post-Training Quantization for Large Language Models.

$ python smoothquant.py --model facebook/opt-1.3b --save-path smoothed-models/facebook/opt-1.3b

Note: due to hard-coded assumptions on model architecture in the script this only works for OPT models that apply the layer_norm before the attention (do_layer_norm_before=true in config.json). This means all models but facebook/opt-350m.