Add FuseSoC core files

[flaviens]

Hi there!

I created some FuseSoC cores for this project in a new repo. The goal is to improve dependency management (for the moment it relies on git submodules).
Do you want to integrate them into this repo or should we keep them separate?
If you want to integrate them to this repo, for the future it may be favorable to move from Makefiles to FuseSoC for the testing process as well.

Thanks!
Flavien

[dpetrisko]

Hi, awesome!

I think based on this example that it's preferred to have separate core file repos.

https://github.com/fusesoc/fusesoc-cores

From a maintenance perspective, it seems like having the core files versioned with the code would be better, so we could change them atomically. Maybe the best is to have a subdirectory in the repo that provides the core files? And then when adding the library we use the raw path to the core directory instead of the toplevel git url?

Seems like a discussion we should have with Olof

[flaviens]

Created PR #15.

Maybe the best is to have a subdirectory in the repo that provides the core files

I agree that would look the most elegant.
However, FuseSoC does not seem to like this. If I locate the core files in a new fusesoc directory, then it says:

WARNING: The file ../source/<blablabla>.v in <path to hardfloat>/fusesoc/hardfloat_RISCV.core is not within the directory containing the core file. This is deprecated and will be an error in a future FuseSoC version. A typical solution is to move core file into the root directory of the IP block it describes.