Re: [Qemu-devel] x86 tcg problem

[Vince Weaver <vince@csl.cornell.edu>]

On Tue, 29 Jul 2008, Laurent Desnogues wrote:

> On Tue, Jul 29, 2008 at 5:32 AM, Vince Weaver <vince@csl.cornell.edu> wrote:
>>
>> I've spent a day now trying to figure out why bzip2 compress/decompress
>> doesn't work when using sparc32plus-linux-user on x86.
>>
>> I've tracked the problem to the Zero flag being improperly set (attached is
>> a small exe/src that reproduces the problem.. it reports "Greater"
>> on real hardware, "Less Than" on qemu current).
>
> It looks like it works with revision 4963:
>
> ./sparc32plus-linux-user/qemu-sparc32plus cmp_test
> Less Equal
>
> I guess it's malc commits 4961-2 that fixed it :-)

I made a slight mistake in that post, "Less Equal" is the wrong condition, 
not "Less Than".  It still doesn't work, even with 4963.  Real hardware 
returns this:

(valor is a Niagara system)

valor:~/research/sparc_qemu% ./cmp_test
Greater


Vince