Re: [9/9] Support __float128 format on Intel and Power

[Joseph Myers <joseph@codesourcery.com>]

On Thu, 25 Aug 2016, Ulrich Weigand wrote:

> Since at this point we do not yet have any indication in the debug info to
> distinguish different floating-point formats of the same length, we simply
> use the type name as hint.  Types named "__float128" get the IEEE format.

Note that now (GCC 7) __float128 is a built-in typedef (i.e. a name 
registered with the register_builtin_type langhook) for _Float128, and 
_Float128 is the primary name used when the type is created.  If I build a 
program with GCC 7 that uses __float128, the debug info I get references 
_Float128 (and not __float128 as far as I can see).

Obviously debugging should work whether someone uses _Float128 or 
__float128 (and in C++, right now they can only use __float128, as the 
keyword _Float128 is C-specific).  Then on Power, _Float64x is also 
binary128 when available (but is a distinct type at the C level from 
_Float128), but on x86 it has the Intel extended format (but is a distinct 
type from long double).

-- 
Joseph S. Myers
joseph@codesourcery.com