From: terje.mathisen@nospicedham.tmsw.no   
      
   Branimir Maksimovic wrote:   
   > I tried with them recenlty and they are slow, slow,   
   > slower then manualy loading ;)   
   > I mean like "loop" instruction, uselless ;)   
   >   
   Gather is supposed to run at minimum one word per cycle, but preferably   
   all loads that come from the same cache line should happen in a single   
   cycle, so that looking up stuff in a compact structure should be   
   reasonably fast, and much faster than scalar loads.   
      
   The first Larrabee CPU had gather implemented in an external chip, so it   
   was effectively a coprocessor. The idea was that you would setup a bunch   
   of these as part of a big processing loop, then stream the results through.   
      
   I.e. typical GPU optimizing for bandwidth, not latency.   
      
   Terje   
      
   --   
   -    
   "almost all programming can be viewed as an exercise in caching"   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)