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#include <assert.h>
#include <limits.h>
struct TestS {
long x, y, q, r;
};
static struct TestS test_s[] = {
{ 4, 2, 2, 0 }, /* normal cases */
{ 9, 7, 1, 2 },
{ 0, 0, -1, 0 }, /* div by zero cases */
{ 9, 0, -1, 9 },
{ LONG_MIN, -1, LONG_MIN, 0 }, /* overflow case */
};
struct TestU {
unsigned long x, y, q, r;
};
static struct TestU test_u[] = {
{ 4, 2, 2, 0 }, /* normal cases */
{ 9, 7, 1, 2 },
{ 0, 0, ULONG_MAX, 0 }, /* div by zero cases */
{ 9, 0, ULONG_MAX, 9 },
};
#define ARRAY_SIZE(X) (sizeof(X) / sizeof(*(X)))
int main (void)
{
int i;
for (i = 0; i < ARRAY_SIZE(test_s); i++) {
long q, r;
asm("div %0, %2, %3\n\t"
"rem %1, %2, %3"
: "=&r" (q), "=r" (r)
: "r" (test_s[i].x), "r" (test_s[i].y));
assert(q == test_s[i].q);
assert(r == test_s[i].r);
}
for (i = 0; i < ARRAY_SIZE(test_u); i++) {
unsigned long q, r;
asm("divu %0, %2, %3\n\t"
"remu %1, %2, %3"
: "=&r" (q), "=r" (r)
: "r" (test_u[i].x), "r" (test_u[i].y));
assert(q == test_u[i].q);
assert(r == test_u[i].r);
}
return 0;
}
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