Adios2: Endian_Reverse is broken in master

[keichi]

Reading a big-endian BP file on a little-endian machine gives garbage data. The array content is wrong, but variable names, array shapes and min/max are correct.

• ADIOS2BPWriteReadAsStream2D2x4Test_be_dump.txt: bpls dump of a big-endian BP file on a little-endian machine (broken)
• ADIOS2BPWriteReadAsStream2D2x4Test_le_dump.txt: bpls dump of a little-endian BP file on a little-endian machine (correct )

[williamfgc]

hi @keichi I am working on a patch in the next few days so you won't be stalled. This will require adding external testing so a future master branch won't break this.

[keichi]

Great, thanks! Let me know if you need big-endian files for testing. I've also found out a way to run ppc64 (BE) Debian on x86 using qemu-user and chroot, if that helps.

[williamfgc]

Hi @keichi thanks! I have a patch (running CI now) that I tested previous generated files. I will try to find some time to set up a repo where big-endian files can be added. That way at least we test this at least nightly. I will keep you posted.

In the meantime, this patch should fix the currently broken Endian_Reverse support. BTW, set ADIOS2_USE_Endian_Reverse=ONexplicitly when configuring adios2 with cmake. Thanks!

[keichi]

@williamfgc I've confirmed the fix, thanks!