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???
05/17/07 21:57
Modified:
  05/17/07 22:00
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 		 #139466 - WHAT??? You mean I have it too? Dystypia?
Responding to: ???'s previous message
Dystypia ??? EEEEEK!

Yes, but, it's not too high a price to pay under some curcumstances. It depends on what's going to happen to A, DPTR, etc, in the interim between uses. Sadly, one has little help in discerning that in a HLL. In a case where it makes a good bit of difference, it's probably smart to insert a macro in ASM that speeds things up by doing things in the most efficient way possible.

I do that all the time, primarily by eschewing the use of the HLL.

RE


List of 43 messages in thread
TopicAuthorDate
How to speed code?            01/01/70 00:00      
   How did you come to that bizarre idea...            01/01/70 00:00      
      bizarre!?            01/01/70 00:00      
         I am a C-hater, remember...            01/01/70 00:00      
      Smaller, Faster            01/01/70 00:00      
   Is that true??            01/01/70 00:00      
   Often mutually exclusive...            01/01/70 00:00      
   Take my contribution with a grain of salt.            01/01/70 00:00      
      http://www.8052.com/users/disasm/            01/01/70 00:00      
   what compiler?            01/01/70 00:00      
   Data types            01/01/70 00:00      
   Getting the least            01/01/70 00:00      
   My Two Cents            01/01/70 00:00      
      Turn in your Programmer's ID Card.            01/01/70 00:00      
         heheh...yeah            01/01/70 00:00      
         SJMP            01/01/70 00:00      
   Comments            01/01/70 00:00      
   How to speed code?            01/01/70 00:00      
   a couple of \'rules\'            01/01/70 00:00      
      More on Erik's Rules            01/01/70 00:00      
         a comment            01/01/70 00:00      
         PDATA            01/01/70 00:00      
            don't forget about @DPTR access to CDATA            01/01/70 00:00      
               but            01/01/70 00:00      
                  WHAT??? You mean I have it too? Dystypia?            01/01/70 00:00      
                     Enginnering is all about the tradeoffs            01/01/70 00:00      
                        two places where you REALLY can make an impact            01/01/70 00:00      
                           b) buffer at 256 byte boundary            01/01/70 00:00      
                              Alignment            01/01/70 00:00      
                              you did'nt hear ?            01/01/70 00:00      
               Another \"but\"            01/01/70 00:00      
                  it is, after all, quicker            01/01/70 00:00      
                     Errr...            01/01/70 00:00      
                        perhaps, but it has to "live" somewhere.            01/01/70 00:00      
                           You\'re assuming...            01/01/70 00:00      
                              confirming Andys statement            01/01/70 00:00      
                                 We WERE discusisng 805x ...            01/01/70 00:00      
                                    well, does it not?            01/01/70 00:00      
                                       Tables in code space vs data space            01/01/70 00:00      
                                          Philps XA, the best "16 bit '51"            01/01/70 00:00      
                                             Maxim/Dallas DS89C450            01/01/70 00:00      
   most compilers            01/01/70 00:00      
      Thanks            01/01/70 00:00      

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