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Date:      Tue, 20 Nov 2001 13:07:32 -0800
From:      "David O'Brien" <obrien@FreeBSD.ORG>
To:        John Baldwin <jhb@FreeBSD.ORG>, cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG
Subject:   Re: cvs commit: src/sys/i386/include atomic.h
Message-ID:  <20011120130732.A24794@dragon.nuxi.com>
In-Reply-To: <20011121075927.A74178@gsmx07.alcatel.com.au>; from peter.jeremy@alcatel.com.au on Wed, Nov 21, 2001 at 07:59:27AM %2B1100
References:  <200111121657.fACGvYF20899@freefall.freebsd.org> <20011121075927.A74178@gsmx07.alcatel.com.au>

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On Wed, Nov 21, 2001 at 07:59:27AM +1100, Peter Jeremy wrote:
> On Mon, Nov 12, 2001 at 08:57:33AM -0800, John Baldwin wrote:
> >jhb         2001/11/12 08:57:33 PST
> >
> >  Modified files:
> >    sys/i386/include     atomic.h 
> >  Log:
> >  Use newer constraints for inline assembly for an operand that is both an
> >  input and an output by using the '+' modifier rather than listing the
> >  operand in both the input and output sections.
> 
> This change still leaves the non-memory operand's constraint as "ir"
> in all cases - this isn't correct for the char or short cases.  I have
> some old patches to fix this.

Please dig them up if you can.  I really suspect some of the problems
with 'gcc -O2' may be due to bad ASM constraints.

> In any case, -stable also needs the change to use "+".

yes.

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