.NET 5開始支援半精度浮點數Half類型
https://www.ithome.com.tw/news/139755
直接查維基感覺是最近才出來的新型別，
Reference來源日期好像都是2018以後
bfloat16 floating-point format
https://en.wikipedia.org/wiki/Bfloat16_floating-point_format
Wang, Shibo; Kanwar, Pankaj (2019-08-23). "BFloat16: The secret to high
performance on Cloud TPUs". Google Cloud. Retrieved 2020-08-11. This custom
floating point format is called “Brain Floating Point Format,” or “bfloat16
” for short. The name flows from “Google Brain”, which is an artificial
intelligence research group at Google where the idea for this format was
conceived.
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