Re: [Qemu-devel] [PATCH] target-s390x: fix LOAD MULTIPLE instruction on page boundary

[Peter Maydell]

On 23 May 2015 at 09:22, Aurelien Jarno <address@hidden> wrote:
> On 2015-05-22 00:00, Alexander Graf wrote:
>> Looks like you're finding lots of fun corner case bugs in the
>> emulation. Have you or Richard considered to implement s390x
>> support in Risu yet? Aarch64 emulation accuracy is remarkable
>> since its introduction.
>
> I have just learned about Risu, so no I haven't considered that. Do you
> have an idea about the efforts required to port it to another
> architecture?

The C code parts should be pretty trivial to port: we've kept
the architecture-specific parts fairly cleanly separated. More awkward
is the risugen perl script, which currently handles ARM, Thumb
and 64-bit ARM instructions but doesn't currently have the
same careful separation of CPU specific bits. Still, the necessary
refactoring should not be too difficult.

-- PMM