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Date: Mon, 9 Aug 2021 08:03:35 +0200
From: Olivier Galibert <galibert@...ox.com>
To: Rich Felker <dalias@...c.org>
Cc: Jon Chesterfield <jonathanchesterfield@...il.com>, musl@...ts.openwall.com
Subject: Re: [PATCH] stdlib: implement qsort_r
Yeah, the wrapper_cmp version looks rather good, I didn’t realize it would
go down to one instruction. Or that an old patch would have been stalled
for five months ;-)
OG
Le lun. 9 août 2021 à 01:05, Rich Felker <dalias@...c.org> a écrit :
> On Sun, Aug 08, 2021 at 10:21:06PM +0100, Jon Chesterfield wrote:
> > On Sun, Aug 8, 2021 at 9:39 PM Érico Nogueira <ericonr@...root.org>
> wrote:
> >
> > > This is the favored approach, from what I understood of the discussions
> > > surrounding it. It's implemented with musl's namespacing rules and such
> > > in [1].
> > >
> >
> > Unsurprisingly I like your patch.
> >
> > >
> > > It is badly optimized for some archs, unfortunately, as explained in
> the
> > > thread from [2]. I believe that's what's holding it up.
> > >
> > > [1]
> > >
> https://inbox.vuxu.org/musl/20210309210213.29539-1-ericonr@disroot.org/
> > > [2]
> > >
> https://inbox.vuxu.org/musl/20210309150320.GU32655@brightrain.aerifal.cx/
> >
> >
> > And that's what I get for not reading the list carefully enough. I missed
> > the thread
> > from March entirely.
>
> No problem. Indeed, this was stalled because of concerns about bad
> compiler behavior on some archs, but I really don't want to allow that
> to dictate how we solve the problem. The compiler is doing the wrong
> thing (failing to tail call) and should just be fixed. I'll probably
> merge the tail-call patch as-is, or with any minimal fixes needed,
> right after this release so as not to make major API changes at last
> minute.
>
> Rich
>
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