This is the mail archive of the
mailing list for the GCC project.
Re: PowerPC IEEE 128-bit floating point: Language standards
- From: Jason Merrill <jason at redhat dot com>
- To: Michael Meissner <meissner at linux dot vnet dot ibm dot com>, gcc at gcc dot gnu dot org, dje dot gcc at gmail dot com, amodra at gmail dot com, rguenther at suse dot de, jakub at redhat dot com, segher at kernel dot crashing dot org, bergner at vnet dot ibm dot com, rdsandiford at googlemail dot com, pthaugen at us dot ibm dot com, wschmidt at linux dot vnet dot ibm dot com, Ulrich dot Weigand at de dot ibm dot com, stigge at antcom dot de, vmakarov at redhat dot com, andrewd at gentrack dot com, joseph at codesourcery dot com, sjmunroe at us dot ibm dot com, nathan at codesourcery dot com, paul at codesourcery dot com, stigge at debian dot org, doko at ubuntu dot com, steven at gcc dot gnu dot org, dominiq at lps dot ens dot fr, acsawdey at linux dot vnet dot ibm dot com, azanella at linux dot vnet dot ibm dot com
- Date: Mon, 02 Jun 2014 12:06:19 -0400
- Subject: Re: PowerPC IEEE 128-bit floating point: Language standards
- Authentication-results: sourceware.org; auth=none
- References: <20140530195816 dot GA28688 at ibm-tiger dot the-meissners dot org> <20140602154535 dot GA14850 at ibm-tiger dot the-meissners dot org>
On 06/02/2014 11:45 AM, Michael Meissner wrote:
I have not been following the language standards recently. For any of the
recent language standards, or the standards that are being worked on, will
there be requirements for an IEEE 128-bit binary floating point type? For the
C/C++ languages, is this type long double, or is another type being proprosed
(such as __float128)?
C++ doesn't require any particular value representation for arithmetic
types. But std::numeric_limits<long double>::is_iec559 will let you
know whether it conforms or not.