Re: Debugger support for __float128 type?

Ulrich Weigand wrote on Thu, 01 Oct 2015:

> Right, that's the current situation on PowerPC.  (On Intel, long double
> is the 80-bit IEEE extended type, padded to either 12 bytes (32-bit)
> or 16 bytes (64-bit), while __float128 is IEEE quad-precision.)

A side note here: the Free Pascal Compiler supports the 80-bit  
extended type stored in memory as either 10 bytes (for Turbo Pascal  
and Delphi compatibility) or using the ABI-specified size (which is 16  
bytes for Darwin/i386, and otherwise as you mention above).

We always output the used bytesize in the DWARF info, and in case  
there are padding bytes (i.e., the non-10-byte size cases) we also  
emit the DW_AT_bit_offset.

I don't know how important it is in this context, but it may be useful  
to keep in mind.


Jonas