On Tue, Dec 04, 2018 at 12:10:05PM -0800, David Miller wrote:
> From: Alexei Starovoitov <alexei.starovoi...@gmail.com>
> Date: Tue, 4 Dec 2018 11:29:55 -0800
> 
> > I guess sparc doesn't really have 32 subregisters.  All registers
> > are considered 64-bit. It has 32-bit alu ops on 64-bit registers
> > instead.
> 
> Right.
> 
> Anyways, sparc will require two instructions because of this, the
> 'sra' then a 'srl' by zero bits to clear the top 32-bits.
> 
> I'll code up the sparc JIT part when this goes in.

You already did :)
As far as I can see sparc64 JIT supports it properly.
Just like x64.
Hence the patches for these JITs are missing in Joing's set.

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