#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>

typedef signed short s16;

#define tick_before(t1,t2) ((((s16)(t1))-((s16)(t2))) < 0)

// This one is good
// #define tick_before_2(t1,t2) ((s16)(((s16)(t1))-((s16)(t2))) < 0)

// This one is good too
#define tick_before_2(t1,t2) ((s16)((t1)-(t2)) < 0)

// This does not work
// #define tick_before_2(t1,t2) ((s16)(t1) - (s16)(t2) < (s16)0)

int main()
{
	unsigned short tick = 32816;
	unsigned short ed_tick = 32766;

	printf("tick %d ed->tick %d\n", tick, ed_tick);
	printf("old tick_before(tick, ed->tick): %d\n", tick_before(tick, ed_tick));
	printf("new tick_before(tick, ed->tick): %d\n", tick_before_2(tick, ed_tick));
	return 0;
}