[Bug testsuite/126866] New: rs6000: gcc.target/powerpc/mma-double-test.c fails on Power10 big-endian.

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126866

            Bug ID: 126866
           Summary: rs6000: gcc.target/powerpc/mma-double-test.c fails on
                    Power10 big-endian.
           Product: gcc
           Version: 16.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: testsuite
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mmatti at linux dot vnet.ibm.com
  Target Milestone: ---

PASS: gcc.target/powerpc/mma-double-test.c (test for excess errors)
FAIL: gcc.target/powerpc/mma-double-test.c execution test 

This test fails on Power10 big-endian, the failure may be due to
endian-dependent expected values.

__builtin_mma_assemble_pair (&rowB, rb[1], rb[0]); <= probable cause for the
fail. The register order of __builtin_mma_assemble_pair is endian dependent.