mgorny added a comment.

At a quick glance, we'd have to enhance `Scalar` to fully support x87 extended 
type. FWICS it's currently modeled to use convert `APFloat` from/to 
`float`/`double`/`long double` types. Maybe we could get away with some lossy 
rounding but it doesn't like a good way forward. It would probably be a better 
idea to drop some of the abstraction and/or use `APFloat` more.

I don't think an effort to getting proper x87 float support should be blocking 
this. If anyone is sufficiently motivated to implement it, it will be easy to 
switch the client to it, both for lldb-server and gdbserver usage.


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