Re: [Qemu-devel] [Qemu-ppc] [PATCH v4 0/9] POWER9 TCG enablements - part4

[Thomas Huth]

On 28.09.2016 07:31, Nikunj A Dadhania wrote:
> This series contains 7 new instructions for POWER9 ISA3.0
> Use newer qemu load/store tcg helpers and optimize stxvw4x and lxvw4x.
> 
> GCC was adding epilogue for every VSX instructions causing change in 
> behaviour. For testing the load vector instructions used mfvsrld/mfvsrd 
> for loading vsr to register. And for testing store vector, used mtvsrdd 
> instructions. This helped in getting rid of the epilogue added by gcc. Tried 
> adding the test cases to kvm-unit-tests, but executing vsx instructions 
> results in cpu exception. Will debug that later. I will send the test code 
> and steps to execute as reply to this email.

Did you enable the VEC bit in the MSR before trying to run your
instruction in a kvm-unit-test? If not, that might be the cause.

Alternatively, there is also a tests/tcg/ folder in QEMU ... you could
add a tests/tcg/ppc64 subfolder there.

 Thomas