Re: [Qemu-devel] RFC: reverse-endian softmmu memory accessors

[Thiemo Seufer <ths@networkno.de>]

J. Mayer wrote:
[snip]
> > > Here's a new version. The only change is that, for consistency, I did
> > > add the big-endian and little-endian accessors that were documented in
> > > cpu-all.h as unimplemented. The implementation is quite trivial, having
> > > native and reverse-endian accessors available, and changes functionnally
> > > nothing to the previous version.
> > 
> > The patch does not apply anymore. The Sparc part looks OK.
> > 
> > The benefits from the patch can be gained by mapping Sparc64 lduw and
> > ldsw in op_mem.h  directly to ldul and ldsl using SPARC_LD_OP and
> > replacing the ldl+bswap etc. for the LE cases with ldlr in
> > op_helper.c. If you prefer, I can do this after you have applied the
> > patch.
> 
> Yes, there are conflicts between this patch and the mmu_idx one I just
> commited. I will regenerate an updated diff in the hours to come, after
> I finished commiting the PowerPC fixes and improvments I got waiting in
> stock.
> For the Sparc improvments, as I merged the PowerPC improvments in the
> patch, I think it can be a good idea to include it directly in the
> patch.
> I'm also wondering if it would not be a good idea to define lduq/ldsq
> even if they in fact do exactly what ldq does now, just to have a fully
> consistent API.

Some architecture specs mention the possibility of 128 bit integers, so
this sounds like a good idea.


Thiemo