is real an 80-bit type or not?

[Bill Baxter]

That all sounds perfectly reasonable.  So why would that make it onto 
someone's "top D peeves" list?

--bb

Anders F Björklund wrote:
> Bill Baxter wrote:
> 
>> I read somewhere (won't say where ;-)) that someone is annoyed by D 
>> "pretending that "real" is an 80-bit type".  Is it not?  real.sizeof 
>> sure seems to return 10 for me.
> 
> 
> It's an 80-bit type on all (make that "both") DMD platforms...
> It varies on the platforms and architectures that GDC supports.
> 
> "int" is a fixed 32-bit type, everywhere. "real" varies in size.
> It's 80-bit on Intel, 64 bits on PowerPC and 128 bits on SPARC ?
> 
> It's defined as the "largest hardware implemented" float type.
> Basically since it maps directly onto the "long double" C type.
> 
> --anders
> 
> PS. real.sizeof varies between Intel too, due to padding.
>     But it should be the same x87 format of the registers.
> 
>     GDC manual says: "On Win32, GDC allocates 12 bytes for
>     the real type, while DMD allocates 10 bytes."