https://blog.wongcw.com/2021/01/14/%e5%9c%8b%e7%94%a2%e8%8a%af%e7%89%87%e6%96%b0%e7%aa%81%e7%a0%b4%ef%bc%9a%e8%b3%bd%e6%98%89%e7%a7%91%e6%8a%80%e7%99%bc%e5%b8%83risc-v-ai%e5%96%ae%e6%9d%bf%e8%a8%88%e7%ae%97%e6%a9%9f/