[dpdk-dev] [PATCH v1] lib/hash: support non sse42 cpu architecture

[Stephen Hemminger]

On Fri, 09 Apr 2021 00:41:34 +0200
Thomas Monjalon <thomas at monjalon.net> wrote:

> 25/03/2021 09:06, Thomas Monjalon:
> > 24/03/2021 23:59, Wang, Yipeng1:  
> > > From: kumar amber  
> > > > 
> > > > add _SSE42_ flag to enable compilation of
> > > > sse42 specific instructions only on supported architecture
> > > > 
> > > > Signed-off-by: kumar amber <kumar.amber at intel.com>  
> [...]
> > > [Wang, Yipeng] 
> > > Hi, Kumar, thanks for the patch.
> > > I think the minimum required machine for x86 is sse4.2 compatible already. So I wonder if we really need this.  
> > 
> > Yes, that's why I don't understand this patch.  
> 
> Any comment? Should we reject the patch?
> 
> 
> 

The only use case would be running DPDK in a VM for a hypervisor that
disables those instructions in guest. Some old crufty hypervisors don't
handle it??