Same setup as https://gist.github.com/ZenithalHourlyRate/7b5175734f87acb73d0bbc53391d7140 (aligned from openssl/openssl#18267 and Zbb/Zbc from openssl/openssl#17640)
I've made a PR openssl/openssl#18285
It turned out that both RV32/RV64 can use the same function (I removed RV64 specific asm) and here is the new benchmark