selftests/powerpc: Replace stxvx and lxvx with their equivalent instruction

[Michael Ellerman]

On Tue, 2017-03-07 at 00:39:31 UTC, Cyril Bur wrote:
> On POWER8 (ISA 2.07) lxvx and stxvx are defined to be extended mnemonics
> of lxvd2x and stxvd2x. For POWER9 (ISA 3.0) the HW architects in their
> infinite wisdom made lxvx and stxvx instructions in their own right.
> 
> POWER9 aware GCC will use the POWER9 instruction for lxvx and stxvx
> causing these selftests to fail on POWER8. Further compounding the
> issue, because of the way -mvsx works it will cause the power9
> instructions to be used regardless of -mcpu=power8 to GCC or -mpower8 to
> AS.
> 
> The safest way to address the problem for now is to not use the extended
> mnemonic. These tests only perform register comparisons the big endian
> only byte ordering for stxvd2x and lxvd2x does not impact the test.
> 
> Signed-off-by: Cyril Bur <cyrilbur at gmail.com>
> Signed-off-by: Cyril Bur <cyrilbur at gmail.com>
> Acked-by: Balbir Singh<bsingharora at gmail.com>

Applied to powerpc fixes, thanks.

https://git.kernel.org/powerpc/c/605df8d674ac65e044a0bf4998b28c

cheers