[m-dev.] MR_CPU_SFENCE required for .par grades?

[Paul Bone]

On Fri, Aug 26, 2011 at 03:23:53PM +1000, Julien Fischer wrote:
> 
> Hi,
> 
> The .par grades (including hlc.par.gc) now require MR_CPU_SFENCE to be
> available.  Is this intentional?  Even, for the hlc.par.gc grade?
> 

It is intentional for low level C par grades, but not for high level C ones.

There are slower algorithms we can (and should be) using when it's not
available.  This is also true for many of the other assembler definitions and
compiler intrinsics.

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