This is the fdlibm library imported from
https://github.com/freebsd/freebsd
Upstream code can be viewed at
https://github.com/freebsd/freebsd/tree/master/lib/msun/src
Each file is downloaded separately, as cloning whole repository takes so much
resources.
The in-tree copy is updated by running
sh update.sh
from within the modules/fdlibm directory.
Current version: [commit f2287da07ac7a26ac08745cac66eec82ab9ba384].
patches 01-14 fixes files to be usable within mozilla-central tree.
See https://bugzilla.mozilla.org/show_bug.cgi?id=933257
ec5b99da7e