"Joseph S. Myers" <jos...@codesourcery.com> writes:
> On Wed, 18 Nov 2009, Rainer Orth wrote:
>
>> be added on legacy platforms like IRIX and Tru64 UNIX, and even on
>> Solaris probably won't show up until DFP is fully standardized.
>
> I'd have expected the Solaris maintainers to care more about whether
> Solaris customers are asking for DFP support, than about whether it is an
> ISO/IEC Technical Report Type 2 (as at present - TR 24732:2009 published
> 2009-01-05) or an International Standard.
I wasn't aware of that. Buying the TR from ISO is prohibitive, to I
stayed with the (last?) draft, N1312 for now. I've asked the Sun
compiler guys about their plans for decimal float support, but no answer
so far:
http://mail.opensolaris.org/pipermail/tools-compilers/2009-November/000907.html
> As Janis says, the psABI needs to be aware of decimal floating point, so
> if there is any group or community for a particular target concerned with
> its ABI for interoperability between multiple implementations, you should
> work with them on establishing the ABI for decimal floating point for that
> target.
While the i386 and amd64 psABIs already exist (although I haven't found
the i386 specification yet), for SPARC that would be SPARC
International, I think. Since I expect neither SGI nor HP to implement
decimal float in libc on IRIX 6 or Tru64 UNIX, MIPS and Alpha are
irrelevant from my point of view.
> Much the same applies if anyone wishes to add fixed point (TR 18037)
> support for more targets.
I'll have a look at the last draft (N1169) for now. Right now, only
MIPS support is in GCC, so there seems to be less traction so far.
Thanks.
Rainer
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Rainer Orth, Center for Biotechnology, Bielefeld University
