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   comp.arch      Apparently more than just beeps & boops      131,241 messages   

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   Message 130,123 of 131,241   
   MitchAlsup to All   
   Re: Tonights Tradeoff   
   04 Nov 25 22:51:28   
   
   From: user5857@newsgrouper.org.invalid   
      
   Thomas Koenig  posted:   
      
   > Terje Mathisen  schrieb:   
   >   
   > > I still think the IBM DFP people did an impressively good job packing   
   > > that much data into a decimal representation. :-)   
   >   
   > Yes, that modulo 1000 packing is quite clever.  It is relatively   
   > cheap to implement in hardware (which is the point, of course).   
   > Not sure how easy it would be in software.   
      
   Brain dead easy: 1 table of 1024 entries each 12-bits wide,   
                    1 table of 4096 entries each 10-bits wide,   
   isolate the 10-bit field, LD the converted value.   
   isolate the 12-bit field, LD the converted value.   
      
   Other than "crap loads" of {deMorganizing and gate optimization}   
   that is essentially what HW actually does.   
      
   You still need to build 12-bit decimal ALUs to string together   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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