Branch prediction would work just as well in the original tests Ken ran,
I think. There must be something else going on.

Jim wrote:
> It could be due to branch prediction by the cpu.
>
> Ken Warner wrote:
>> Yeah, when I integrated it into my bi-cubic interpolator, it slowed it
>> down compared to the logical check clamp.  I'm not sure why yet. Maybe
>> it was the way I integrated it.  I don't know.
>>
>> In my test suite, the time to interpolate a 944 x 644 image went from
>> 1350ms using the logical test clamp to 1440ms using the triple shift.
>> I'm not sure why...  I work on a real slow (800mhz) machine just so I
>> can see these kinds of things better.
>


--
Peter B. West <http://cv.pbw.id.au/>
Folio <http://defoe.sourceforge.net/folio/>

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