Zydis x64/x86 disassembler imported from github, see https://github.com/zyantific/zydis and https://github.com/zyantific/zycore-c.
Zydis is MIT licensed code, see Zydis/LICENSE and Zycore/LICENSE.
Sources here were taken from the tag/revision of Zydis that is recorded in the file imported-revision.txt.
The file hierarchy of Zydis+Zycore has been flattened and processed as described in the script update.sh.
The procedure for pulling a new version is encoded in the script update.sh, which is to be run from the parent directory of zydis, ie, from js/src/. It will create a new zydis directory and pull new files from github into it, leaving the old zydis directory as zydis_old.
It's not a given that the script will work out of the box for new versions of zydis or that the resulting files will build as-is. Buyer beware.