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Re: [PATCH] more x86-64 corrections
- From: "H. J. Lu" <hjl at lucon dot org>
- To: Jan Beulich <JBeulich at novell dot com>
- Cc: nickc at redhat dot com, binutils at sources dot redhat dot com
- Date: Fri, 23 Jul 2004 08:08:38 -0700
- Subject: Re: [PATCH] more x86-64 corrections
- References: <firstname.lastname@example.org>
Feel free to submit a patch to do what you prefer as long as it doesn't
break gcc for Intel EM64T.
On Fri, Jul 23, 2004 at 04:35:09PM +0200, Jan Beulich wrote:
> I'm not happy with that, but then let's leave this hunk out. However,
> your change to revert to allow the segment overrides is then incomplete:
> You either allow them all (cs,ds,es,fs,gs,ss), or you disallow all that
> are pointless (cs,ds,es,ss). Or, as I indicated, you suppress their use
> as segment override elsewhere, thus *only* allowing them as branch
> prediction hints (but for a standalone prefix I can't imagine how one
> would do that correctly). Jan
> >>> "H. J. Lu" <email@example.com> 23.07.04 16:04:47 >>>
> On Fri, Jul 23, 2004 at 02:54:38PM +0200, Jan Beulich wrote:
> > additions that should be done. Finally, intermediately cs and ds
> > segment
> > overrides got wrongly re-enabled in 64-bit mode. This patch tries to
> > address
> > all of this.
> Nick, please don't apply this patch. It is wrong for Intel EM64T.
> Jan, please bootstrap gcc 3.4.1 with -mtune=nocona on x86-64 and let
> us know how it goes.