DF mangling

[Joseph Myers]

On Tue, 22 May 2018, Segher Boessenkool wrote:

> Hi!
> 
> The Itanium C++ ABI defines
> https://itanium-cxx-abi.github.io/cxx-abi/abi.html#mangling-builtin
> DF<number>_ as the mangling for the <number> bit IEEE binary float type,
> i.e. _Float<number>.
> 
> But the libiberty unwinders decode DF<something> as fixed point type, see
> https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=libiberty/cp-demangle.c;h=3f2a097e7f2075e5750e40a31ce46589d4ab83d5;hb=HEAD#l2659
> 
> This conflicts.  How are we going to resolve it?

I don't think there's any conflict between the mangling DF<number>_ for 
_FloatN, and DF<number>[ijstlmxy]<number>[sn] for fixed point.  If DF is 
followed by a number, the following character is '_' for _FloatN and the 
code for an integer type for fixed point.

-- 
Joseph S. Myers
joseph@codesourcery.com