test.c

#include <stdio.h>

/* ARM output:
1000 / div = 10
-1000 / div = 42949662
-1000 / (long)div = -10
*/

int main() {
    unsigned long div = 100;
    long result;

    result = 1000 / div;
    printf("1000 / div = %ld\n", result);

    result = -1000 / div;
    printf("-1000 / div = %ld\n", result);

    result = -1000 / (long)div;
    printf("-1000 / (long)div = %ld\n", result);

    return 0;
}