[sdcc-devel] [ sdcc-Support Requests-1589768 ] Execution time and machine cycles

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Support Requests item #1589768, was opened at 2006-11-03 09:14
Message generated for change (Comment added) made by frief
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Category: None
Group: None
Status: Closed
Priority: 5
Private: No
Submitted By: Anton (candanabi)
Assigned to: Nobody/Anonymous (nobody)
Summary: Execution time and machine cycles

Initial Comment:
Can you add execution time in listing file for every
function in program, and add machine cycles in listing
file in line with every assembler codes ? Thanks.

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>Comment By: Frieder Ferlemann (frief)
Date: 2006-11-07 18:16

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another option would be to try persuading asx8051 
to output the (plain 8051) cycles to the assembly 
listing (*.lst) file like:

 0059 EE                  790         mov     a,r6        ; 12
 005A 12s00r00            791         lcall   __gptrput   ; 24  


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Comment By: Frieder Ferlemann (frief)
Date: 2006-11-07 18:00

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another option would be to try persuading asx8051 
to output the (plain 8051) cycles to the assembly 
listing (*.lst) file like:

 0059 EE                  790         mov     a,r6        ; 12
 005A 12s00r00            791         lcall   __gptrput   ; 24  


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Comment By: Anton (candanabi)
Date: 2006-11-04 09:02

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Marteen,

Thanks for your explanation, i appreciate it.

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Comment By: Maarten Brock (maartenbrock)
Date: 2006-11-03 19:43

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Anton,

It will be impossible to predict the execution time of functions as it depends on runtime inputs.

It is also hard to add machine cycles for every instruction as it differs from derivative to derivative these days. 
Not to mention mcu's with an instruction cache.

I think you're better off writing a utility for this for the mcu of your choice that parses the generated asm files.

Maarten

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