Re: [v3] atomics

[David Daney <ddaney at avtrex dot com>]

Jakub Jelinek wrote:
> On Fri, Apr 18, 2008 at 10:51:33AM -0700, David Daney wrote:
> > At this point I don't really have an opinion as to how to fix the 
> > problem.  One thought that comes to mind is to change the definition of 
> > atomic_flag so that the size of the atomic variable is appropriate for 
> > the target architecture (32 bits in the case of MIPS)
>
> Best is to add support for the 8 and 16-bit sync builtins.
> See e.g. sparc or s390 backends how it can be done using 32-bit
> compare and swap instruction.

Thanks Jakub,

Would it make sense to handle this in a more generic manner where the 
operations are expanded?  Or should each target just write patterns for 
8 and 16 bit operations if they don't natively support it?

David Daney