int _divu__ (int dividend, int divisor) {
	if (dividend < 0) {
		if (divisor < 0) {
			return divisor > dividend ? 0 : 1;
		} else {
			int multiple = divisor;
			int twice = multiple << 1;
			int quot = 1;
			while (twice > 0) {
				multiple = twice;
				twice <<= 1;
				quot <<= 1;
			}
			dividend -= multiple;
			if (dividend < 0) {
				dividend -= multiple;
				quot <<= 1;
			}
			return dividend / divisor + quot;
		}
	} else {
		if (divisor < 0) {
			return 0;	
		} else {
			return dividend / divisor;
		}
		
	}
}

int _remu__ (int dividend, int divisor) {
	return dividend - _divu__(dividend, divisor) * divisor;
}

int _rem__ (int dividend, int divisor) {
	return dividend - (dividend / divisor) * divisor;
}

void _copy__(int src, int dest, int size) {
	int i, *s, *d, *end;
	s = &(((int*)0)[src]);
	d = &(((int*)0)[dest]);
	end = s + size;
	do {
		*s++ = *d++;
	} while (s < end);
}

int _int_to_byte__(int i) {
	int mask;
	i = i & 0xff;
	if (i > 0x7f)
		mask = (signed)0xffffff00;
	else 
		mask = 0;
	return mask | i;
}	

int _int_to_short__(int i) {
	int mask;
	i = i & 0xffff;
	if (i > 0x7fff)
		mask = (signed)0xffff0000;
	else 
		mask = 0;
	return mask | i;	
}