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???
06/13/07 23:10
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 		 #140731 - Uninitialised?
Responding to: ???'s previous message
Jan Waclawek said:
1. the Keil's used a RAM variable (r) while there are plenty of empty registers;

It's likely due to 'r' being uninitialised (although all unknown bits are shifted out later). It's a strange situation, and I think the optimiser is saying "I don't know what is going on here, so I won't put this in a register".


List of 87 messages in thread
TopicAuthorDate
Sunday Quiz - Bit Flipper in C            01/01/70 00:00      
   Here's My 41 Bytes            01/01/70 00:00      
      Very nice, but call it 43 (explained herein)            01/01/70 00:00      
   Sunday Quiz Update            01/01/70 00:00      
      OK Then 39 Bytes...            01/01/70 00:00      
         Oh my goodness            01/01/70 00:00      
            If you want performance...            01/01/70 00:00      
         More bytes, but ...            01/01/70 00:00      
   OK Then 38 Bytes            01/01/70 00:00      
      Comma            01/01/70 00:00      
         36! Holy cow! Very nice!            01/01/70 00:00      
            my 36            01/01/70 00:00      
               Non-conforming            01/01/70 00:00      
                  Wow! 34! |<3WL! :-)            01/01/70 00:00      
                     ???            01/01/70 00:00      
                        KEWL = cool in l33t :-) (worse than SMS...)            01/01/70 00:00      
                  Wow is right!!! plus another 36            01/01/70 00:00      
         Broken            01/01/70 00:00      
            C doesn't try to save you ...            01/01/70 00:00      
            Not Broken            01/01/70 00:00      
   look for samples of FFT code ...            01/01/70 00:00      
   this is competing to make the worst possible            01/01/70 00:00      
      it's certainly not the solution...            01/01/70 00:00      
         correction            01/01/70 00:00      
            Unless you're "porting" ...            01/01/70 00:00      
               there are situations...            01/01/70 00:00      
                  au contraire            01/01/70 00:00      
                     overlayed variables            01/01/70 00:00      
                        non-religious reasons and debunking some            01/01/70 00:00      
                           I doubt that            01/01/70 00:00      
                              now try            01/01/70 00:00      
                                 with the error or without?            01/01/70 00:00      
                                    the 49 is a compare the 48 is coding time            01/01/70 00:00      
                                       47, 48, 49            01/01/70 00:00      
                                          for such a cause as            01/01/70 00:00      
                                          Still more            01/01/70 00:00      
                                             one more point for Pascal            01/01/70 00:00      
                                                Language and vocabulary contributions            01/01/70 00:00      
                                                   Language and vocabulary contributions            01/01/70 00:00      
                                                Yes, it's much more "self-documenting"            01/01/70 00:00      
                                    Singular?            01/01/70 00:00      
                                 well... around 5 minutes            01/01/70 00:00      
                              It's not funny            01/01/70 00:00      
                                 this is why I don't like the "modern" over-windowe            01/01/70 00:00      
         Tastes            01/01/70 00:00      
      Skill in reading            01/01/70 00:00      
         in other words: because there are burglars detecti            01/01/70 00:00      
            That's why one should use ASM and not 'C'            01/01/70 00:00      
               nope            01/01/70 00:00      
                  are you perfect?            01/01/70 00:00      
                  That's why the documentation is necessary            01/01/70 00:00      
                     the old argument from C haters            01/01/70 00:00      
                     One page of comments per statement?            01/01/70 00:00      
                        If it's to be understood later on ...            01/01/70 00:00      
                           if I have to explain my choice of syntax in C, the            01/01/70 00:00      
                              The point is to show why, and not why-not            01/01/70 00:00      
                                 I post, you 'reply'            01/01/70 00:00      
                           Sorry, I still need more help on this            01/01/70 00:00      
                              Never had to do that ... and for good reason.            01/01/70 00:00      
                                 Maybe just one unclear point now            01/01/70 00:00      
                                    Well, if it were up to me ...            01/01/70 00:00      
                                       Thanks            01/01/70 00:00      
                                          I hope you're not missing my point ...            01/01/70 00:00      
                                             You explained yourself clearly            01/01/70 00:00      
                                 Upside down            01/01/70 00:00      
                                    Just look at the body of work ...            01/01/70 00:00      
                                       Nature of commercial software            01/01/70 00:00      
                                          Maybe it's more like a 747 vs. a bicycle            01/01/70 00:00      
                                    on driving and "coding"            01/01/70 00:00      
         even Mr. K agrees            01/01/70 00:00      
   Post Mortem #1            01/01/70 00:00      
      I object            01/01/70 00:00      
      Post Mortem #1.1            01/01/70 00:00      
         both translations are "strange"            01/01/70 00:00      
            Uninitialised?            01/01/70 00:00      
      20 bytes.            01/01/70 00:00      
         teaching the compiler...            01/01/70 00:00      
            Maybe for HLLs, but not for C ...            01/01/70 00:00      
               I know this is the praxis....            01/01/70 00:00      
         incorrect/incomplete statement            01/01/70 00:00      
   Post Mortem #2            01/01/70 00:00      
      Vote: 1. Yes 2. Dont care            01/01/70 00:00      
      modify it!!!!            01/01/70 00:00      
      vote            01/01/70 00:00      
         methink            01/01/70 00:00      
   its interesting that C            01/01/70 00:00      
      I like your proposal            01/01/70 00:00      

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