[FFmpeg-devel] [flamefest-start] A little something on MMX/SSE intrinsics

Balatoni Denes dbalatoni
Wed Feb 27 23:35:36 CET 2008


Wednesday 27 February 2008 23:23-kor Michael Niedermayer ezt ?rta:
> On Wed, Feb 27, 2008 at 09:33:09PM +0000, M?ns Rullg?rd wrote:
> > That depends on the CPU.  Some CPUs are quite particular about
> > instruction scheduling.
> That is true but can gcc schedule instructions properly on these cpus?
> Also the real question is can gcc beat a human in instruction scheduling ;)

And don't forget register allocation. IMHO the compiler should be able to do 
optimal instruction scheduling, also optimal register allocation - doing both 
together (and you need to do both) is hard.


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