[FFmpeg-cvslog] r12487 - trunk/configure

[Michael Niedermayer]

On Mon, Mar 09, 2009 at 11:17:41PM +0000, M?ns Rullg?rd wrote:
> Michael Niedermayer <michaelni at gmx.at> writes:
> 
> > On Tue, Mar 18, 2008 at 01:32:55PM +0100, diego wrote:
> >> Author: diego
> >> Date: Tue Mar 18 13:32:55 2008
> >> New Revision: 12487
> >> 
> >> Log:
> >> Check for and set HAVE_MMX2, it is used in several places.
> >> patch by Alexander Strange, astrange ithinksw com
> > [...]
> >> @@ -1517,8 +1519,9 @@ EOF
> >>      # check wether EBX is available on x86
> >>      check_asm ebx_available '"":::"%ebx"'
> >>  
> >> -    # check whether binutils is new enough to compile SSSE3
> >> +    # check whether binutils is new enough to compile SSSE3/MMX2
> >>      enabled ssse3 && check_asm ssse3 '"pabsw %xmm0, %xmm0"'
> >
> >> +    enabled mmx2  && check_asm mmx2  '"movss %xmm0, %xmm0"'
> >
> > this is not a mmx2 instruction
> 
> Can you suggest a good one to test?

I can suggest a random one
like
pshufw $0x12, %mm0, %mm0
or
pmaxub %mm0, %mm1

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Rewriting code that is poorly written but fully understood is good.
Rewriting code that one doesnt understand is a sign that one is less smart
then the original author, trying to rewrite it will not make it better.
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