Re: [boost] [predef] Status and review results?

Subject: Re: [boost] [predef] Status and review results?
From: Rene Rivera (grafikrobot_at_[hidden])
Date: 2013-04-21 20:18:35

On Sun, Apr 21, 2013 at 6:45 PM, Lars Viklund <zao_at_[hidden]> wrote:

> On Mon, Apr 22, 2013 at 01:22:33AM +0400, Andrey Semashev wrote:
> > On Sunday 21 April 2013 16:00:49 Rene Rivera wrote:
> > > Just a quick message to mention that I've finished all the review
> related
> > > changes to the Predef library. And done some of the future tasks on the
> > > library. In particular the addition of endianness definitions and the
> > > moving of MinGW as a platform instead of a compiler (and hence the
> addition
> > > of BOOST_PLAT category of macros.
> > >
> > > And the one question I have is.. When will the review results of the
> > > library be decided on? I ask for two reasons. One, the obvious, is
> just to
> > > know if it's accepted or not. And to know if it's not accepted and
> hence
> > > that I should spend time to recreate a "boost/detail/endian.hpp" header
> > > that implements the Predef logic for endian detection.
> > >
> > > Note the project move to Github earlier this year (in preparation for
> the
> > > Boost git move). You can find the project at <
> > > https://github.com/grafikrobot/boost-predef>, and browse the current
> > > documentation at <http://tinyurl.com/cqqhhev>.
> >
> > I noticed this in the docs:
> >
> > BOOST_ARCH_X86_64
> > Intel IA-64 architecture.
> >
> > x86_64 (aka amd64 and Intel64), which is a widespread extension to IA32
> (x86),
> > is not the same as IA64, which is implemented in Itanium CPUs. Could you,
> > please, separate these two architectures?
> >
> > Also, FYI there is a new "architecture" x86_32 on Linux, which is not
> legacy
> > x86 described by your BOOST_ARCH_X86_32 macro. x86_32 is essentially
> x86_64
> > with 32 bit pointers and size types. You should probably make this clear
> in
> > the docs and I'd even rename BOOST_ARCH_X86_32 to BOOST_ARCH_X86_LEGACY
> or
> > something because of this and introduce BOOST_ARCH_X86_32 with the new
> > meaning. Sorry, I don't have specific macros to detect x86_32 right now
> but it
> > is supported by gcc.
>
> I thought that the mongrel ABI was properly called "x32" [1][2][3].
> Searching for x86_32 just seems to hit a bunch of confused people
> actually meaning the regular boring 32-bit x86.
>
> While they made an odd naming decision calling it "x32", calling it
> something else than what it's actually called would be a disservice.
>

Indeed.. I might consider adding an ARCH_X86_X32. Although more appropriate
might be ARCH_X86_64_X32. But I'm somewhat reticent to add an ARCH that is
just an "emulation" running on X86_64.

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