Re: What does this mean?

[Thomas Huth]

On 28/05/2023 14.23, Harold Grovesteen wrote:
> It is triggered by a CLC instruction.  The "bizarre" cc goes away when
> the CLC instruction is commented out.
>
> I can rework the code to avoid the use of the CLC instruction.  But
> thought it should be shared.
>
> /home/harold/qemu-7.2.0-rc4/install/bin/qemu-system-s390x -machine
> s390-ccw-virtio -cpu max -m 3M -no-shutdown -nographic -serial
> mon:stdio -kernel test12.elf
> QEMU 7.1.94 monitor - type 'help' for more information
> (qemu) info registers
>
> CPU#0
> PSW=mask 0000100180000000 addr 0000000000002034 cc CC_OP_LTUGTU_64

It's an internal representation of the condition code ... a little bit ugly 
for the end user, I guess, but likely quite useful if you're working on the 
instruction emulation within QEMU.

You can find more information here:


https://gitlab.com/qemu-project/qemu/-/blob/v8.0.0/target/s390x/s390x-internal.h#L144

 HTH,
  Thomas