Support dequantizing GGUF FP16 format
Author: PenutChen
Pull request: yes
Labels: name: Quantization

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Fixes #31762: Supports GGUF integration to dequantize FP16 format.


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@SunMarc 

Comments:
> Thanks for adding this ! Could you add a test to make sure that it works ? You can put it in the tests/quantization/ggml/test_ggml.py file

@SunMarc currently, only TinyLlama has reasonable outputs, but I can't find an FP16 GGUF model on HF Hub. Should I upload one myself?

Yes, that would be great ! 

@SunMarc I've added an f16 test, and the models are now uploaded to the [HF Hub](https://huggingface.co/PenutChen/TinyLlama-1.1B-Chat-v1.0-GGUF). Also, I've uploaded the bf16 and f32 tinyllama for future tests. Let me know if you need anything else!

Hi @SunMarc, I'm wondering if there's anything more I can do to help with this PR?

Can you try to rebase on main and check if this fixes the CI ? 

The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/transformers/pr_31783). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

> Can you try to rebase on main and check if this fixes the CI ?

@SunMarc am i doing this right?

Can you run `make style` ? the quality ci is not passing 

Got it! I also found that the bad BF16 implementation was pushed, so I removed it.