[cxx-abi-dev] IEEE 754r half-precision fp mangling?

[Dennis Handly]

>From: scott douglass <scott.douglass at arm.com>
>I'm happy to use 'D<letter>' if there's already a precedent.

Well, we talked about it for the 3 Dec FP types.
I just mentioned using it for the char16_t and char32_t.

>What are the existing 'D<letter>' manglings?

I think Df, De, Dr.
The only issue is that D0 D1 D2 are used for destructors so there is
some lookahead needed.

>If 'Dh' is available, I change my proposal to:
><type> ::= Dh # half-precision floating point (16bit)

Yes, Dh is free.

>From: Mark Mitchell <mark at codesourcery.com>
>I don't see any precedent there -- but I think we could do that.

Yes, using D, seems to give us 26*2 types.

>Here is another possible trick that we could use for both DFP and 
>half-precision float...  Since we have:
>So, we could use "uh" for half-precision float.  That's the same number 
>of characters and avoids using any new encoding space?
Mark Mitchell

It seems kind of hokey.  Almost as bad as my D[0-9] vs D[a-zA-Z] proposal.
And we can include those two char types.