On Fri, 11 Dec 2009, Bob Axtell wrote:

> The easiest way to reliably do this is to generate flowcharts of the
> assembly, then write in C from the flowcharts. But if you understand
> the code well enough to flowchart it, just change it (if that's what
> you want to do) in ASM. Eliminate the 'C' step...
> 
> --Bob A

Actually the assembly code may be so optimised that the only way to 
flowchart it is either (1) instruction by instruction or (2) at a 
functional level which bares very little relationship to the code on a 
line by line level.

consider this:

original code

	x = x + 1;

	if (x >= 256)
	{	j = j + 1;
		x = 0;
	}

optimised to

	movlw	1
	addwf	x
	btfsc	STATUS, C
	incf	j

What would the flowcharts look like for each case above?

Regards
Sergio Masci
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