Message-ID: <47D024AA.9010300@zytor.com>
Date: Thu, 06 Mar 2008 09:06:50 -0800
From: "H. Peter Anvin" <hpa@zytor.com>
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To: "H.J. Lu" <hjl.tools@gmail.com>
CC: Jakub Jelinek <jakub@redhat.com>, NightStrike <nightstrike@gmail.com>,
       Olivier Galibert <galibert@pobox.com>,
       Chris Lattner <clattner@apple.com>, Michael Matz <matz@suse.de>,
       Richard Guenther <richard.guenther@gmail.com>,
       Joe Buck <Joe.Buck@synopsys.com>, Jan Hubicka <hubicka@ucw.cz>,
       Aurelien Jarno <aurelien@aurel32.net>, linux-kernel@vger.kernel.org,
       gcc@gcc.gnu.org
Subject: Re: RELEASE BLOCKER: Linux doesn't follow x86/x86-64 ABI wrt direction
 flag
References: <738B72DB-A1D6-43F8-813A-E49688D05771@apple.com>	 <2F47E21A-9055-4EC3-99CF-B666BBC045C3@apple.com>	 <47CF3F09.4080606@zytor.com>	 <578FCA7D-D7A6-44F6-9310-4A97C13CDCBE@apple.com>	 <47CF44E7.3020106@zytor.com> <20080306135139.GA5236@dspnet.fr.eu.org>	 <b609cb3b0803060737xa0c3c0byb51d51af797eb81f@mail.gmail.com>	 <6dc9ffc80803060743h502fc96bj6117ef87a8555c3a@mail.gmail.com>	 <47D012B4.3020104@zytor.com>	 <20080306162353.GF24887@devserv.devel.redhat.com> <6dc9ffc80803060858i7d4e8b56o99ff8ad301a5cc1a@mail.gmail.com>
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H.J. Lu wrote:
> On Thu, Mar 6, 2008 at 8:23 AM, Jakub Jelinek <jakub@redhat.com> wrote:
>> On Thu, Mar 06, 2008 at 07:50:12AM -0800, H. Peter Anvin wrote:
>>  > H.J. Lu wrote:
>>  > >I agree with it. There is no  right or wrong here Let's start from
>>  > >scratch and figure out
>>  > >what is the best way to handle this, assuming we are defining a new psABI.
>>
>>  BTW, just tested icc and icc doesn't generate cld either (so it matches the
>>  new gcc behavior).
>>  char buf1[32], buf2[32];
>>  void bar (void);
>>  void foo (void)
>>  {
>>   __builtin_memset (buf1, 0, 32);
>>   bar ();
>>   __builtin_memset (buf2, 0, 32);
>>  }
>>
> 
> Icc follows the psABI. If we are saying icc/gcc 4.3 need a fix, we'd
> better define
> a new psABI first.
> 

Not a fix, an (optional) workaround for a system bug.

	-hpa
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