Re: [Xen-devel] [PATCH v5 02/17] x86emul: support MMX/SSE{, 2, 3} moves

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 03/03/17 14:58, Jan Beulich wrote:
> Previously supported insns are being converted to the new model, and
> several new ones are being added.
>
> To keep the stub handling reasonably simple, integrate SET_SSE_PREFIX()
> into copy_REX_VEX(), at once switching the stubs to use an empty REX
> prefix instead of a double DS: one (no byte registers are being
> accessed, so an empty REX prefix has no effect), except (of course) for
> the 32-bit test harness build.
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

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