ni...@lysator.liu.se (Niels Möller) writes:
> Do I understand that code correctly, that qemu never reads the third
> "vrc" input to the instruction?
Actually, it appears latest qemu is doing this correctly (it's just that
for some reason, operands are named a->vra, a->vrb, a->rc (sic!), a->vrt
in the qemu sources, which had me a bit confused). I've tried building
qemu from source, which was a very easy, and then the tests pass.
I've also checked the sources of the version I have in debian
("qemu-ppc64le version 5.2.0 (Debian 1:5.2+dfsg-11+deb11u2)"), and it
appears it has no support for the vmsumudm instruction at all. The
confusing part is that (i) the tests fail with incorrect results, rather
than some kind of unimplemented instruction exception, and (ii) support
is still advertised so that it is picked up by the fat build logic.
A proper implementation is in qemu-7, currently in debian testing.
Regards,
/Niels
--
Niels Möller. PGP key CB4962D070D77D7FCB8BA36271D8F1FF368C6677.
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