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Jan Waclawek
08/01/05 05:12
Read: 774 times
Bratislava
Slovakia


 
#98571 - nohohoho
Responding to: Andy Neil's previous message
Andy Neil said:
Jan Waclawek said:
... the major drawback is, that you need to perform the simulation/cycle counting each time whan you recompile

That is why you'd use Assembler - then you'd know that it would stay the same unless you specifically changed it.

No - if I'd C, and had critical routine, I'd use assembler only if unable to make it fast enough in C (and able to do so in asm). I'm sure I will find my way how to enforce staying it the same, if I've counted the cycles once (e.g. there must be something like .obj for '51, or a way to switch off further optimisation using those smart linkers you mentioned).

Maybe I didn't make my point clear enough - one needs to recount the cycles each time when modifying the source - _that_ would be a pain.

But, if you want, let's agree on that automatic cycle counting is rather complicated so maybe not worth doing it - I don't care at all as I don't C - it was of pure academic interest for me.

Jan Waclawek


List of 18 messages in thread
TopicAuthorDate
Counting cycles... possible in C?      Jan Waclawek      07/28/05 01:03      
   You need a Profiler      Andy Neil      08/01/05 00:00      
      The compiler knows      Jan Waclawek      08/01/05 03:21      
         Source code useless      Andy Neil      08/01/05 04:50      
         That's why you need Assembler!      Andy Neil      08/01/05 04:56      
            nohohoho      Jan Waclawek      08/01/05 05:12      
               Speed is not everything!      Andy Neil      08/01/05 05:54      
   Cycles vary?      James Krushlucki      08/01/05 01:37      
      I know      Jan Waclawek      08/01/05 03:23      
   absolutely, but what good does it do      Erik Malund      08/01/05 06:27      
      other way round      Jan Waclawek      08/01/05 07:10      
         Yes, the things posted apply in this cas      Erik Malund      08/01/05 07:23      
            exactly for this reason      Jan Waclawek      08/01/05 08:29      
               how can you automate that it is small en      Erik Malund      08/01/05 08:35      
   Use Microsoft Excel      Aubrey Kagan      08/01/05 18:04      
      excel and conditional branches ?      Erik Malund      08/02/05 05:53      
         That's why      Aubrey Kagan      08/02/05 07:13      
            That makes absolutotally no difference,      Erik Malund      08/02/05 07:23      

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