new version

new version

div6 was prototyped with this program:

typedef unsigned char u8;
int main(void) {
	for (int i = 0; i <= 0x78; i++) {
		u8 real = i/6;
		u8 test = i;

		test >>= 1;
		test += i;

		test >>= 1;
		test += 0;

		test >>= 1;
		test += i;

		test >>= 1;
		test += 0;

		test >>= 1;
		test += i;

		test >>= 1;
		test += 0;

		test >>= 1;
		test >>= 1;

		if (test != real)
			printf ("%hhd/6 == %hhd != %hhd\n", i, real, test);
	}
	return 0;
}