Architectures and Processors forum what changes to the source code of ARM Cortex-M3 can i make in order to shorten execution time?

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what changes to the source code of ARM Cortex-M3 can i make in order to shorten execution time?

kris over 11 years ago

here are the 3 codes i need to change to shorten execution time.

any help will be greatly appreciated.

5734.zip

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Peter Harris over 11 years ago in reply to kris +1 verified

Ignore the current code, and design the solution from a clean sheet; the best optimizations are those which solve the problem a different way rather than trying to move instructions about. If someone told...

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0 kris over 11 years ago in reply to Peter Harris

hey peterharris
Im getting the wrong answers with the above changes.
Any idea why?
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0 kris over 11 years ago in reply to Peter Harris

hey peterharris
Im getting the wrong answers with the above changes.
Any idea why?
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0 kris over 11 years ago in reply to ali

Hi Ali, can you please explain further why its wrong. i dont fully understand.
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0 ali over 11 years ago in reply to kris

Hi
individ_loop

MOV r4,#5 ----------------> MOVLE r4,#5
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0 ali over 11 years ago in reply to kris

Hi
this is wrong :
       CMP rx,#10
       MOVLT rx,rx,LSR #1          --------------> rx=5 (always)
      MOV rx,#5
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