Compute the ceiling of an integer division without floating point

ceiling.c

#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>

#define     ceilu32(x, y)          ((((((uint32_t) x) << 16) / (uint32_t) y) + 0xffff) >> 16)

int main(void)
{
    uint16_t var1, var2, result;
    
    for (var1 = 1; var1 <= 50000; var1++)
    {
        for (var2 = 1; var2 <= 50000; var2++)
        {
            result = ceilu32((var1, var2);
        }
    }
    return 0;
}