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/* See LICENSE file for copyright and license details. */
#include "common.h"
#ifndef TEST
extern inline void libj2_j2u_abs_diff_j2u_to_j2u(const struct libj2_j2u *a, const struct libj2_j2u *b, struct libj2_j2u *res);
#else
static uintmax_t
random_ju(void)
{
size_t n = LIBJ2_JU_BIT;
uintmax_t r = 0;
while (n--)
if (rand() < rand())
r |= (uintmax_t)1 << n;
return r;
}
static void
check_(const struct libj2_j2u *a, const struct libj2_j2u *b, const struct libj2_j2u *expected)
{
struct libj2_j2u r, a_saved = *a, b_saved = *b;
r = (struct libj2_j2u){111, 222};
libj2_j2u_abs_diff_j2u_to_j2u(a, b, &r);
EXPECT(libj2_j2u_eq_j2u(a, &a_saved));
EXPECT(libj2_j2u_eq_j2u(b, &b_saved));
EXPECT(libj2_j2u_eq_j2u(&r, expected));
r = *a;
libj2_j2u_abs_diff_j2u_to_j2u(&r, b, &r);
EXPECT(libj2_j2u_eq_j2u(b, &b_saved));
EXPECT(libj2_j2u_eq_j2u(&r, expected));
r = *b;
libj2_j2u_abs_diff_j2u_to_j2u(a, &r, &r);
EXPECT(libj2_j2u_eq_j2u(a, &a_saved));
EXPECT(libj2_j2u_eq_j2u(&r, expected));
r = *a;
libj2_j2u_abs_diff_j2u(&r, b);
EXPECT(libj2_j2u_eq_j2u(b, &b_saved));
EXPECT(libj2_j2u_eq_j2u(&r, expected));
r = (struct libj2_j2u){111, 222};
libj2_j2u_abs_diff_j2u_to_j2u(a, a, &r);
EXPECT(libj2_j2u_eq_j2u(a, &a_saved));
EXPECT(libj2_j2u_is_zero(&r));
r = *a;
libj2_j2u_abs_diff_j2u_to_j2u(&r, &r, &r);
EXPECT(libj2_j2u_is_zero(&r));
r = *a;
libj2_j2u_abs_diff_j2u(&r, &r);
EXPECT(libj2_j2u_is_zero(&r));
}
static void
check(const struct libj2_j2u *a, const struct libj2_j2u *b)
{
struct libj2_j2u expected;
if (libj2_j2u_ge_j2u(a, b))
libj2_j2u_sub_j2u_to_j2u(a, b, &expected);
else
libj2_j2u_sub_j2u_to_j2u(b, a, &expected);
check_(a, b, &expected);
check_(b, a, &expected);
}
int
main(void)
{
struct libj2_j2u a, b;
uintmax_t u, v;
unsigned i;
srand((unsigned)time(NULL));
for (i = 0; i < 256U; i++) {
a.high = random_ju();
a.low = u = random_ju();
b.high = random_ju();
b.low = v = random_ju();
check(&a, &b);
b.low = 0;
check(&a, &b);
a.low = 0;
check(&a, &b);
b.high = 0;
a.low = u;
b.low = v;
check(&a, &b);
b.low = 0;
check(&a, &b);
a.low = 0;
check(&a, &b);
a.high = 0;
a.low = u;
b.low = v;
check(&a, &b);
b.low = 0;
check(&a, &b);
}
return 0;
}
#endif
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