Add more data format

[fumihwh]

@evanw
This is an awesome project and I love it!
But lack of some new data format, such as BF16, TF32. Could you add supports of them?

[leoniescape]

hi evanw, this project is great!!! I use it everyday 👍 Do you consider adding new data format like F8? Thanks

[HarryWu99]

Yeah! I need BF16, TF32, too!