Re: [ros-dev] [ros-diffs] [jgardou] 58660: [MESA32] * Disable SSE optimizations, as they only cause mayhem.

[Kamil Hornicek]

"LOL", I'm not "trying" to "fix" "anything" -
disabling the whole SSE 
support is on par with disabling just the check. You fix the kernel and 
you better do it soon.

Dne 4.4.2013 21:58, Timo Kreuzer napsal(a):
>  
>  LOL, we have a bug in the kernel and you try to "fix" this in MESA?
>
>
>  Am 04.04.2013 14:33, schrieb Kamil Hornicek:
> >   If I recall correctly there's a check whether
> > the OS can handle
> >  masked/unmasked sse exceptions. It causes trouble even in Windows if
> >  the app using Mesa has it's own exception handlers installed IIRC. SSE
> >  works just fine. Just disable the (useless) _mesa_check_os_sse_suppor
> >  stuff (ReactOS supports this, no need to do the check) or find a way
> >  to stop the exception from propagating.
> >
> >  Regards,
> >  Kamil
> >
> >  Dne 4.4.2013 12:34, Jérôme Gardou napsal(a):
> > >   It causes some kernel mode exception. The code
> > > deliberately throws an
> > >  SSE exception to see if the OS supports them. The trap handler considers
> > >  this as a k-mode exception and bug checks.
> > >
> > >  See http://jira.reactos.org/browse/CORE-6776
> > >
> > >  Timo Kreuzer a écrit :
> > > >  
> > > >  What exactly does it cause? And shouldn't we rather fix that,
> > > >  instead of
> > > >  disabling optimizations? mesa is already slow enough.
> > > >
> > > >  Am 03.04.2013 14:02, schrieb jgardou(a)svn.reactos.org:
> > > > > Author: jgardou
> > > > > Date: Wed Apr  3 12:02:58 2013
> > > > > New Revision: 58660
> > > > >
> > > > > URL: http://svn.reactos.org/svn/reactos?rev=58660&view=rev
> > > > > Log:
> > > > > [MESA32]
> > > > >   * Disable SSE optimizations, as they only cause mayhem.
> > > > >
> > > > > Modified:
> > > > >      trunk/reactos/dll/opengl/mesa/src/mesa/CMakeLists.txt
> > > > >
> > > > > Modified: trunk/reactos/dll/opengl/mesa/src/mesa/CMakeLists.txt
> > > > > URL:
> > > > >
> > > > http://svn.reactos.org/svn/reactos/trunk/reactos/dll/opengl/mesa/src/mesa/C…
> > > > >
> > > > >
> > > > >
> > > > > ==============================================================================
> > > > >
> > > > >
> > > > >
> > > > > --- trunk/reactos/dll/opengl/mesa/src/mesa/CMakeLists.txt [iso-8859-1]
> > > > > (original)
> > > > > +++ trunk/reactos/dll/opengl/mesa/src/mesa/CMakeLists.txt [iso-8859-1]
> > > > > Wed Apr  3 12:02:58 2013
> > > > > @@ -33,17 +33,18 @@
> > > > >           x86/3dnow_xform3.S
> > > > >           x86/3dnow_xform4.S
> > > > >           x86/3dnow_normal.S
> > > > > -        x86/sse_xform1.S
> > > > > -        x86/sse_xform2.S
> > > > > -        x86/sse_xform3.S
> > > > > -        x86/sse_xform4.S
> > > > > -        x86/sse_normal.S
> > > > > +        # x86/sse_xform1.S
> > > > > +        # x86/sse_xform2.S
> > > > > +        # x86/sse_xform3.S
> > > > > +        # x86/sse_xform4.S
> > > > > +        # x86/sse_normal.S
> > > > >           x86/read_rgba_span_x86.S)
> > > > >       add_definitions(
> > > > >           -DUSE_X86_ASM
> > > > >           -DUSE_MMX_ASM
> > > > >           -DUSE_3DNOW_ASM
> > > > > -        -DUSE_SSE_ASM)
> > > > > +        # -DUSE_SSE_ASM
> > > > > +    )
> > > > >   endif()
> > > > >   list(APPEND SOURCE
> > > > >
> > > > >
> > > > >
> > > >
> > > >
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