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pseries: Fix qdev.id handling in the VIO bus code
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1#ifndef INT128_H
2#define INT128_H
3
4typedef struct Int128 Int128;
5
6struct Int128 {
7 uint64_t lo;
8 int64_t hi;
9};
10
11static inline Int128 int128_make64(uint64_t a)
12{
13 return (Int128) { a, 0 };
14}
15
16static inline uint64_t int128_get64(Int128 a)
17{
18 assert(!a.hi);
19 return a.lo;
20}
21
22static inline Int128 int128_zero(void)
23{
24 return int128_make64(0);
25}
26
27static inline Int128 int128_one(void)
28{
29 return int128_make64(1);
30}
31
32static inline Int128 int128_2_64(void)
33{
34 return (Int128) { 0, 1 };
35}
36
37static inline Int128 int128_add(Int128 a, Int128 b)
38{
39 Int128 r = { a.lo + b.lo, a.hi + b.hi };
40 r.hi += (r.lo < a.lo) || (r.lo < b.lo);
41 return r;
42}
43
44static inline Int128 int128_neg(Int128 a)
45{
46 a.lo = ~a.lo;
47 a.hi = ~a.hi;
48 return int128_add(a, int128_one());
49}
50
51static inline Int128 int128_sub(Int128 a, Int128 b)
52{
53 return int128_add(a, int128_neg(b));
54}
55
56static inline bool int128_nonneg(Int128 a)
57{
58 return a.hi >= 0;
59}
60
61static inline bool int128_eq(Int128 a, Int128 b)
62{
63 return a.lo == b.lo && a.hi == b.hi;
64}
65
66static inline bool int128_ne(Int128 a, Int128 b)
67{
68 return !int128_eq(a, b);
69}
70
71static inline bool int128_ge(Int128 a, Int128 b)
72{
73 return int128_nonneg(int128_sub(a, b));
74}
75
76static inline bool int128_lt(Int128 a, Int128 b)
77{
78 return !int128_ge(a, b);
79}
80
81static inline bool int128_le(Int128 a, Int128 b)
82{
83 return int128_ge(b, a);
84}
85
86static inline bool int128_gt(Int128 a, Int128 b)
87{
88 return !int128_le(a, b);
89}
90
91static inline bool int128_nz(Int128 a)
92{
93 return a.lo || a.hi;
94}
95
96static inline Int128 int128_min(Int128 a, Int128 b)
97{
98 return int128_le(a, b) ? a : b;
99}
100
101static inline Int128 int128_max(Int128 a, Int128 b)
102{
103 return int128_ge(a, b) ? a : b;
104}
105
106static inline void int128_addto(Int128 *a, Int128 b)
107{
108 *a = int128_add(*a, b);
109}
110
111static inline void int128_subfrom(Int128 *a, Int128 b)
112{
113 *a = int128_sub(*a, b);
114}
115
116#endif