4 tests fail on POWER8 ppc64le about box64 HOT 7 OPEN

can you try to diff the result of the failing test with the reference?
For the build folder, do something like

git diff --no-index test07.out ../tests/ref07.txt

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diff --git a/test07.out b/../box64-9999//tests/ref07.txt
index bbad3e3..76649ab 100644
--- a/test07.out
+++ b/../box64-9999//tests/ref07.txt
@@ -1 +1 @@
-0 is 0.000000, sin(pi/2) is 0.000000 and 3*1.5 is 1.000000.
+0 is 0.000000, sin(pi/2) is 1.000000 and 3*1.5 is 4.500000.

from box64.

Ah ok. Looks like some issue with printf (or a variant) wrapping!

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Also, did you built with the PPC64LE cmake flags?

from box64.

sure did!!
Htuo.log < build log

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Let me know if there's anything wrong with my cmake flags (I package box for gentoo's guru repository). nogit was intentional as this is a git live ebuild

You are also free to ssh access at any point in the future too to test things or if you want to set up CI on my box

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I bisected this issue on a ppc64le power9 system (has the same issue with test07 failing) and got e2077c4 as the bad change. Looking into it more, I don't think that the change to the flag handling itself is the issue, but rather some packing / alignment side effects of changing the total size of the flags in x64emu_t.

My theory is that the scratch array declared later on in x64emu_t needs extra alignment on ppc64le for some reason, and it used to just happen to be right with the old flag fields. If I force the scratch array to be aligned to 16 bytes, the test starts passing.

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