From: kyle@mcmartin.ca (Kyle McMartin)
To: Grant Grundler <grundler@parisc-linux.org>
Cc: parisc-linux@lists.parisc-linux.org
Subject: Re: [parisc-linux] memory barriers, spinlocks, debuglocks, oh my
Date: Mon, 30 Aug 2004 00:14:19 -0400 [thread overview]
Message-ID: <20040830041419.GA12022@mcmartin.ca> (raw)
In-Reply-To: <20040830040635.GA18211@colo.lackof.org>
On Sun, Aug 29, 2004 at 10:06:35PM -0600, Grant Grundler wrote:
> I think you missed Joel's point.
> Where does SPIN_UNLOCK set the register that it stores to 1?
>
Eh, that's what the "r" (...) does. As I understand it, GCC will have
the value inside the brackets loaded into a register (in this case,
%1 which can be any general register) when the execution path gets to
the assembler.
AIUI, the syntax is
asm(" /* assembler */ "
: output
: input
: clobbers );
Cheers,
--
Kyle McMartin
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next prev parent reply other threads:[~2004-08-30 4:14 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-27 16:37 [parisc-linux] memory barriers, spinlocks, debuglocks, oh my Kyle McMartin
[not found] ` <1093625820.2010.26.camel@mulgrave>
[not found] ` <20040827170342.GD25975@baldric.uwo.ca>
2004-08-28 16:57 ` Joel Soete
2004-08-28 17:07 ` Kyle McMartin
2004-08-28 22:15 ` Kyle McMartin
2004-08-29 16:11 ` Joel Soete
2004-08-29 16:13 ` Kyle McMartin
2004-08-30 4:06 ` Grant Grundler
2004-08-30 4:14 ` Kyle McMartin [this message]
2004-08-30 4:30 ` Grant Grundler
2004-08-30 4:37 ` Kyle McMartin
2004-08-29 16:14 ` Thibaut VARENE
2004-08-29 17:45 ` John David Anglin
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