[Mesa-dev] [Bug 93570] the image of llvmpipe has a low quality on arm (with too many points on it)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93570

--- Comment #5 from Roland Scheidegger <sroland at vmware.com> ---
This looks rather interesting, like a shuffle gone wrong (always affects the
same 3 pixel in 4x4 pixel stamp). This chip does have NEON instructions right?
I think llvm used to have quite some problems if it needed to lower all the
vector code to scalars (not to mention the horrific performance).
Theoretically llvmpipe should work pretty ok on arm (albeit there's no arm
specific optimizations, so slower than possible) but there were spurious
reports of it not working well earlier (not many people try, it seems).
It could also well be a llvm bug, I'd suggest a newer version if you're not
already using the latest.

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