From: Daniel Jacobowitz <dan@codesourcery.com>
To: Dave Korn <dave.korn.cygwin@googlemail.com>
Cc: Andrew Haley <aph@redhat.com>, gcc@gcc.gnu.org
Subject: Re: Release novops attribute for external use?
Date: Mon, 12 Apr 2010 20:53:00 -0000 [thread overview]
Message-ID: <20100412200514.GA19435@caradoc.them.org> (raw)
In-Reply-To: <4BC36AC3.6090700@gmail.com>
On Mon, Apr 12, 2010 at 07:47:31PM +0100, Dave Korn wrote:
> On 12/04/2010 19:04, Andrew Haley wrote:
>
> > I was thinking about non-memory-mapped I/O, a la x86 I/O ports.
>
> I've always thought that was a bad misnomer. Isn't it just an alternative
> memory-mapped address space pretty much like main memory (regardless that the
> mapped devices may have some fairly non-standard characteristics)? Certainly
> from the compiler's point of view it's got to count as "memory"; it's
> somewhere values come from and go to and are "externally visible".
Then you can think about it as "does not alias any non-device
memory", or any number of variants on that.
--
Daniel Jacobowitz
CodeSourcery
next prev parent reply other threads:[~2010-04-12 20:05 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-12 16:56 Bingfeng Mei
2010-04-12 16:58 ` Andrew Haley
2010-04-12 18:05 ` Dave Korn
2010-04-12 18:10 ` Andrew Haley
2010-04-12 18:29 ` Dave Korn
2010-04-12 20:53 ` Daniel Jacobowitz [this message]
2010-04-13 9:45 ` Bingfeng Mei
2010-04-13 9:56 ` Richard Guenther
2010-04-13 10:15 ` Andrew Haley
2010-04-13 10:23 ` Bingfeng Mei
2010-04-13 10:25 ` Richard Guenther
2010-04-13 10:57 ` Richard Guenther
2010-04-13 11:35 ` Bingfeng Mei
2010-04-13 11:53 ` Manuel López-Ibáñez
2010-04-13 15:06 ` Richard Guenther
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