1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
|
/* See LICENSE file for copyright and license details. */
#include "common.h"
#ifndef TEST
extern inline void libj2_j2i_abs_diff_j2i_to_j2u(const struct libj2_j2i *a, const struct libj2_j2i *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
calc_expected(const struct libj2_j2i *large, const struct libj2_j2i *small, struct libj2_j2u *expected)
{
struct libj2_j2u l, s;
struct libj2_j2i e;
if (!libj2_j2i_is_negative(small)) {
libj2_j2i_sub_j2i_to_j2i(large, small, &e);
libj2_j2i_to_j2u(&e, expected);
} else if (!libj2_j2i_is_positive(large)) {
libj2_abs_j2i_to_j2u(large, &s);
libj2_abs_j2i_to_j2u(small, &l);
libj2_j2u_sub_j2u_to_j2u(&l, &s, expected);
} else {
libj2_j2i_to_j2u(large, expected);
libj2_abs_j2i_to_j2u(small, &s);
libj2_j2u_add_j2u(expected, &s);
}
}
static void
check(const struct libj2_j2i *a, const struct libj2_j2i *b)
{
struct libj2_j2u r, expected;
struct libj2_j2i a_saved = *a, b_saved = *b;
if (libj2_j2i_ge_j2i(a, b))
calc_expected(a, b, &expected);
else
calc_expected(b, a, &expected);
r = (struct libj2_j2u){111, 222};
libj2_j2i_abs_diff_j2i_to_j2u(a, b, &r);
EXPECT(libj2_j2i_eq_j2i(a, &a_saved));
EXPECT(libj2_j2i_eq_j2i(b, &b_saved));
EXPECT(libj2_j2u_eq_j2u(&r, &expected));
r = (struct libj2_j2u){111, 222};
libj2_j2i_abs_diff_j2i_to_j2u(b, a, &r);
EXPECT(libj2_j2i_eq_j2i(a, &a_saved));
EXPECT(libj2_j2i_eq_j2i(b, &b_saved));
EXPECT(libj2_j2u_eq_j2u(&r, &expected));
r = (struct libj2_j2u){111, 222};
libj2_j2i_abs_diff_j2i_to_j2u(a, a, &r);
EXPECT(libj2_j2i_eq_j2i(a, &a_saved));
EXPECT(libj2_j2u_is_zero(&r));
}
int
main(void)
{
struct libj2_j2i 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
|
