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

[Balbir Singh]

On 07-Mar-2017 11:43 AM, "Cyril Bur" <cyrilbur at gmail.com> 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>
---



Acked-by: Balbir Singh<bsingharora at gmail.com>
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