https://bugs.freedesktop.org/show_bug.cgi?id=86788
José Fonseca <jfons...@vmware.com> changed:
What |Removed |Added
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CC| |jfons...@vmware.com
--- Comment #6 from José Fonseca <jfons...@vmware.com> ---
> ./ioUrbanTerror.i386
[..]
> unsigned vec_count __attribute__ ((aligned (16)));
This won;'t work on 32-bits unless you use -mstackrealign or
-mincoming-stack-boundary=2.
This is because some years ago gcc started to assume the stack alignment is
16-bytes. But old applications were still built with 4-byte stack aligment.
And because Mesa drivers can't get to choose, they must assume the worst, ie. 4
bytes stack alignment.
BTW, wefore we start investing on custom SSE code paths, we really should be
using -mfpmath=sse on Linux 32bits too. It's recommend by Intel and the
default on MSVC.
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