[Numpy-discussion] A proposal to implement round in C Was: Rookie problems - Why is C-code much faster?

[Bill Baxter]

Generally, C99 support in MSVC.NET is pretty much nil, except for maybe
support for "inline" (which MS had already added prior to the C99
standard).  This wikipedia article links to a quote from the Visual C++
program manager at Microsoft saying "In general we don't see a lot of demand
for C99 features":
      http://en.wikipedia.org/wiki/C_programming_language#C99
So it's not clear the situtation will change any time soon.  I don't know if
VC8 is any better in its C99 support.  I doubt it.  Wikipedia says Borland
is dragging their feet too.

--Bill

On 2/24/06, Bill Baxter <wbaxter at gmail.com> wrote:
>
> There doesn't seem to be any rint() round() or nearestint() defined in
> MSVC 7.1.  Can't find it in an MSDN search either.  I think that's why a
> lot of people in the game biz, at least, use that lrintf function written
> using intrinsics that I posted a link to earlier.  I first heard about that
> on the gd-algorithms mailing list.
>
> --Bill
>
> On 2/24/06, Travis Oliphant <oliphant.travis at ieee.org> wrote:
> >
> > Sasha wrote:
> >
> > >Rint ufunc and ndarray metod "round" are in svn.  x.round(...) is
> > >about 20x faster than around(x) for decimals=0 and about 6x faster for
> > >decimals>0.  The case decimals<0   is slower on integers, but it
> > >actually does something :-)
> > >
> > >
> > Great job.  Thanks for adding this, Sasha...
> >
> > I think many will enjoy using it.
> >
> > Regarding portability:  On my system rint says it conforms to BSD 4.3.
> > How portable is that?
> >
> > Can anyone try it out on say the MSVC compiler for windows?
> >
> > -Travis
> >
> >
> >
> >
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