[Ffmpeg-devel] [PATCH] Chinese AVS video decoder

[Rich Felker]

On Thu, Jun 29, 2006 at 08:35:56PM +0100, M?ns Rullg?rd wrote:
> >> Possible exception is machines with large caches and no byte access to
> >> memory.  Such things exist.
> >
> > And such things will have hopelessly poor multimedia performance
> 
> Some DSPs fall into this category.  They are certainly not poor at
> multimedia if programmed properly.

DSP will be bad at parsing bitstream, even if it is good at the
arithmetic.

> > already. As well as poor string performance, etc...
> 
> The first generation of Alpha CPUs had no byte-access to memory.  They
> did however have powerful instructions for processing bytes within
> 64-bit registers.  On typical tasks (and especially floating point),
> they vastly outperformed then-current (1992) x86 CPUs.

In raw performance at certain tasks, yes. Depends a lot on the task.
They lost by at least a factor of 5 in performance:price ratio though.

Rich