[sdcc-devel] [ sdcc-Feature Requests-1563034 ] Optimize nearby /, %

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Feature Requests item #1563034, was opened at 2006-09-21 19:34
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Category: None
Group: None
Status: Open
Priority: 5
Submitted By: Philipp Krause (spth)
Assigned to: Nobody/Anonymous (nobody)
Summary: Optimize nearby /, %

Initial Comment:
I wrote the following routine to diplay unsigned ints
as ASCII text.
I was surprised when I found that displaying the
highscore, lives left, etc (6 numbers of differing
length) is the bottleneck i a game I wrote.

sdcc treats the / and % separately, so that the
division has to be done twice. I suggest that it should
instead do the division only once and use the results
for both assignments.

void print_number(const cv_vmemp memory, unsigned int
number, unsigned char numbers)
{
	while(numbers)
	{
		unsigned char n = number % 10;
		cv_voutb(n + 48, memory + (--numbers));
		number /= 10;
	}
}


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