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Re: [Qemu-devel] [PATCH 1/2] Detect and use GCC atomic builtins for lock

From: malc
Subject: Re: [Qemu-devel] [PATCH 1/2] Detect and use GCC atomic builtins for locking
Date: Sat, 20 Feb 2010 20:57:05 +0300 (MSK)
User-agent: Alpine 2.00 (LNX 1167 2008-08-23)

On Sat, 20 Feb 2010, Lo?c Minier wrote:

> On Sat, Feb 20, 2010, malc wrote:
> > For instance this:
> > http://sources.redhat.com/ml/libc-alpha/2005-06/msg00112.html
> > 
> > The builtins are too coarse grained and will do more stuff than strictly
> > necessary.
>  Is this the case of the builtins I'm proposing to use?  We could ask
>  for new ones without the drawbacks if any.
>  Do you have another option to implement locking on thumb-2?

No, i'm against using locking GCC builtins for all the other targets (well
PPC), if they provide satisfactory results for thumb-2 please do submit an 
updated patch which uses them only for this host.


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