LGPL VP6 decoder released

[hellfred]

Originally Posted by akupenguin

That's unsigned integers or shift operators... because x/2 is not the same as x>>1 for signed x, so no compiler is allowed to optimize one into the other.

I am not sure if I understood you correct.
I wanted to express that ppl are advised to change

int x = 8;
int y = x/2;

to

unsigned int x = 8;
unsigned y = x >> 1;

So they are supposed to use unsigned int together with the shift operator.
here.
Hellfred

Small programm to test:

#include <iostream>
using namespace std;
int main() {
	unsigned int x = 8;
	x = x >> 1;                // x/2
	cout << x << endl;
	x = x >> 1;                // x/2
	cout << x << endl;
	unsigned int y = 2;
	y = y << 1;                // y*2
	cout << y << endl;
	y = y << 1;                // y*2
	cout << y << endl;
	return 0;
}

will output

haibane@LapLap:~/tmp$ g++ shift.cpp -o shift
haibane@LapLap:~/tmp$ ./shift
4
2
4
8