meson test failed about su2@7.3.1 on centos8_aarch64 but sucesses on centos8_x86_64

[Tom-python0121]

hello,I meet a problem:meson test failed about su2@7.3.1 on centos8_aarch64 but sucesses on centos8_x86_64

Steps to reproduce the issue

aarch64:
[root@localhost spack-build]# meson test
ninja: Entering directory `/home/stage/root/spack-stage-su2-7.3.0-hclqgqw633hcplsgqfeortvmkzd3ee2m/spack-src/spack-build'
[2/2] Linking target UnitTests/test_driver
1/1 Catch2 test driver        FAIL            0.04s   exit status 1
>>> MALLOC_PERTURB_=57 /home/stage/root/spack-stage-su2-7.3.0-hclqgqw633hcplsgqfeortvmkzd3ee2m/spack-src/spack-build/UnitTests/test_driver



Ok:                 0
Expected Fail:      0
Fail:               1
Unexpected Pass:    0
Skipped:            0
Timeout:            0

Full log written to /home/stage/root/spack-stage-su2-7.3.0-hclqgqw633hcplsgqfeortvmkzd3ee2m/spack-src/spack-build/meson-logs/testlog.txt
logs:
1/1 Catch2 test driver FAIL            0.04s   exit status 1
07:06:51 MALLOC_PERTURB_=57 /home/stage/root/spack-stage-su2-7.3.0-hclqgqw633hcplsgqfeortvmkzd3ee2m/spack-src/spack-build/UnitTests/test_driver
----------------------------------- output -----------------------------------

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
test_driver is a Catch v2.11.1 host application.
Run with -? for options

-------------------------------------------------------------------------------
SIMD DOUBLE
-------------------------------------------------------------------------------
../UnitTests/Common/vectorization.cpp:71
...............................................................................

../UnitTests/Common/vectorization.cpp:82: FAILED:
  CHECK( t[1] == 7 )
with expansion:
  0.0 == 7

===============================================================================
test cases:  21 |  20 passed | 1 failed
assertions: 222 | 221 passed | 1 failed

x86_64:
[root@localhost spack-build]# meson test
ninja: Entering directory `/home/stage/root/spack-stage-su2-7.3.0-kuuiztf3o7iuzi424u4nekgw5ge6xv3r/spack-src/spack-build'
ninja: no work to do.
1/1 Catch2 test driver        OK              0.05s


Ok:                 1
Expected Fail:      0
Fail:               0
Unexpected Pass:    0
Skipped:            0
Timeout:            0

Full log written to /home/stage/root/spack-stage-su2-7.3.0-kuuiztf3o7iuzi424u4nekgw5ge6xv3r/spack-src/spack-build/meson-logs/testlog.txt

I want to know what's causing this difference. Does su2 not support aarch64 testing?

[pcarruscag]

Hi, I think it is because our vectorization wrapper does not support ARM yet.
This makes the default SIMD array type have only 1 element, so t[1] in that unit test does not exist basically, using t[0] should pass the test.