-
Notifications
You must be signed in to change notification settings - Fork 0
/
bitfieldsposix64.c
196 lines (186 loc) · 8 KB
/
bitfieldsposix64.c
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
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
/* test bitfields
* DISABLED: win32 win64 linux32 freebsd32 osx32
* RUN_OUTPUT:
---
T0 = 1 1 | 1 1
T1 = 2 2 | 2 2
T2 = 4 4 | 4 4
T3 = 8 8 | 8 8
T4 = 16 8 | 16 8
T5 = 8 8 | 8 8
S1 = 8 8 | 8 8
S2 = 4 4 | 4 4
S3 = 4 4 | 4 4
S4 = 4 4 | 4 4
S5 = 4 4 | 4 4
S6 = 2 2 | 2 2
S7 = 8 8 | 8 8
S8 = 2 2 | 2 2
S8A = 2 2 | 2 2
S8B = 2 2 | 2 2
S8C = 4 4 | 4 4
S9 = 4 2 | 4 2
S10 = 0 1 | 0 1
S11 = 0 1 | 0 1
S12 = 4 4 | 4 4
S13 = 8 4 | 8 4
S14 = 8 4 | 8 4
S15 = 4 4 | 4 4
S16 = 4 1 | 4 1
S17 = 4 4 | 4 4
S18 = 9 1 | 9 1
A0 = 16 8 | 16 8
A1 = 12 4 | 12 4
A2 = 12 4 | 12 4
A3 = 16 4 | 16 4
A4 = 8 4 | 8 4
A5 = 2 1 | 2 1
A6 = 2 2 | 2 2
A7 = 16 8 | 16 8
A8 = 8 8 | 8 8
A9 = 16 8 | 16 8
A10 = 2 2 | 2 2
A11 = 12 4 | 12 4
S9 = x30200
S14 = x300000201
S15 = xe01
S18 = 8 should be 8
A0 = x1
---
*/
int printf(const char *fmt, ...);
void exit(int);
void assert(int n, int b)
{
if (!b)
{
printf("assert fail %d\n", n);
exit(1);
}
}
int is64bit() { return sizeof(long) == 8; } // otherwise assume 32 bit
/*************************************************************/
struct T0 { char x:1; }; // 1 1
struct T1 { short x:1; }; // 2 2
struct T2 { int x:1; }; // 4 4
struct T3 { char a,b,c,d; long long x:1; }; // 8 4 (32 bit) 8 8 (64 bit)
struct T4 { char a,b,c,d,e,f,g,h; long long x:1; }; // 12 4 (32 bit) 16 8 (64 bit)
struct T5 { char a,b,c,d,e,f,g; long long x:1; }; // 8 4 (32 bit) 8 8 (64 bit)
struct S1 { long long int f:1; }; // 4 4 (32 bit) 8 8 (64 bit)
struct S2 { int x:1; int y:1; }; // 4 4
struct S3 { short c; int x:1; unsigned y:1; }; // 4 4
struct S4 { int x:1; short y:1; }; // 4 4
struct S5 { short x:1; int y:1; }; // 4 4
struct S6 { short x:1; short y:1; }; // 2 2
struct S7 { short x:1; int y:1; long long z:1; }; // 4 4 (32 bit) 8 8 (64 bit)
struct S8 { char a; char b:1; short c:2; }; // 2 2
struct S8A { char b:1; short c:2; }; // 2 2
struct S8B { char a; short b:1; char c:2; }; // 2 2
struct S8C { char a; int b:1; }; // 4 4
struct S9 { char a; char b:2; short c:9; }; // 4 2 x30201
struct S10 { }; // 0 1
struct S11 { int :0; }; // 0 1
struct S12 { int :0; int x; }; // 4 4
struct S13 { unsigned x:12; unsigned x1:1; unsigned x2:1; unsigned x3:1; unsigned x4:1; int w; }; // 8 4
struct S14 { char a; char b:4; int c:30; }; // 8 4
struct S15 { char a; char b:2; int c:9; }; // 4 4 xe01
struct S16 { int :32; }; // 4 1
struct S17 { int a:32; }; // 4 4
struct S18 { char a; long long :0; char b; }; // 5 1 (32 bit) 9 1 (64 bit)
struct A0 { int a; long long b:34, c:4; }; // 12 4 (32 bit) 16 8 (64 bit)
struct A1 { int a; unsigned b:11; int c; }; // 12 4
struct A2 { int a; unsigned b:11, c:5, d:16; // 12 4
int e; };
struct A3 { int a; unsigned b:11, c:5, :0, d:16; // 16 4
int e; };
struct A4 { int a:8; short b:7; // 8 4
unsigned int c:29; };
struct A5 { char a:7, b:2; }; // 2 1
struct A6 { char a:7; short b:2; }; // 2 2
struct A7 { short a:8; long b:16; int c; // 12 4 (32 bit) 16 8 (64 bit)
char d:7; };
struct A8 { short a:8; long b:16; int :0; // 8 4 (32 bit) 8 8 (64 bit)
char c:7; };
struct A9 { unsigned short a:8; long b:16; // 16 4 (32 bit) 16 8 (64 bit)
unsigned long c:29; long long d:9;
unsigned long e:2, f:31; };
struct A10 { unsigned short a:8; char b; }; // 2 2
struct A11 { char a; int b:5, c:11, :0, d:8; // 12 4
struct { int ee:8; } e; };
int main()
{
printf("T0 = %d %d | 1 1\n", (int)sizeof(struct T0), (int)_Alignof(struct T0));
printf("T1 = %d %d | 2 2\n", (int)sizeof(struct T1), (int)_Alignof(struct T1));
printf("T2 = %d %d | 4 4\n", (int)sizeof(struct T2), (int)_Alignof(struct T2));
printf("T3 = %d %d | 8 8\n", (int)sizeof(struct T3), (int)_Alignof(struct T3));
printf("T4 = %d %d | 16 8\n", (int)sizeof(struct T4), (int)_Alignof(struct T4));
printf("T5 = %d %d | 8 8\n", (int)sizeof(struct T5), (int)_Alignof(struct T5));
printf("S1 = %d %d | 8 8\n", (int)sizeof(struct S1), (int)_Alignof(struct S1));
printf("S2 = %d %d | 4 4\n", (int)sizeof(struct S2), (int)_Alignof(struct S2));
printf("S3 = %d %d | 4 4\n", (int)sizeof(struct S3), (int)_Alignof(struct S3));
printf("S4 = %d %d | 4 4\n", (int)sizeof(struct S4), (int)_Alignof(struct S4));
printf("S5 = %d %d | 4 4\n", (int)sizeof(struct S5), (int)_Alignof(struct S5));
printf("S6 = %d %d | 2 2\n", (int)sizeof(struct S6), (int)_Alignof(struct S6));
printf("S7 = %d %d | 8 8\n", (int)sizeof(struct S7), (int)_Alignof(struct S7));
printf("S8 = %d %d | 2 2\n", (int)sizeof(struct S8), (int)_Alignof(struct S8));
printf("S8A = %d %d | 2 2\n", (int)sizeof(struct S8A), (int)_Alignof(struct S8A));
printf("S8B = %d %d | 2 2\n", (int)sizeof(struct S8B), (int)_Alignof(struct S8B));
printf("S8C = %d %d | 4 4\n", (int)sizeof(struct S8C), (int)_Alignof(struct S8C));
printf("S9 = %d %d | 4 2\n", (int)sizeof(struct S9), (int)_Alignof(struct S9));
printf("S10 = %d %d | 0 1\n", (int)sizeof(struct S10), (int)_Alignof(struct S10));
printf("S11 = %d %d | 0 1\n", (int)sizeof(struct S11), (int)_Alignof(struct S11));
printf("S12 = %d %d | 4 4\n", (int)sizeof(struct S12), (int)_Alignof(struct S12));
printf("S13 = %d %d | 8 4\n", (int)sizeof(struct S13), (int)_Alignof(struct S13));
printf("S14 = %d %d | 8 4\n", (int)sizeof(struct S14), (int)_Alignof(struct S14));
printf("S15 = %d %d | 4 4\n", (int)sizeof(struct S15), (int)_Alignof(struct S15));
printf("S16 = %d %d | 4 1\n", (int)sizeof(struct S16), (int)_Alignof(struct S16));
printf("S17 = %d %d | 4 4\n", (int)sizeof(struct S17), (int)_Alignof(struct S17));
printf("S18 = %d %d | 9 1\n", (int)sizeof(struct S18), (int)_Alignof(struct S18));
printf("A0 = %d %d | 16 8\n", (int)sizeof(struct A0), (int)_Alignof(struct A0));
printf("A1 = %d %d | 12 4\n", (int)sizeof(struct A1), (int)_Alignof(struct A1));
printf("A2 = %d %d | 12 4\n", (int)sizeof(struct A2), (int)_Alignof(struct A2));
printf("A3 = %d %d | 16 4\n", (int)sizeof(struct A3), (int)_Alignof(struct A3));
printf("A4 = %d %d | 8 4\n", (int)sizeof(struct A4), (int)_Alignof(struct A4));
printf("A5 = %d %d | 2 1\n", (int)sizeof(struct A5), (int)_Alignof(struct A5));
printf("A6 = %d %d | 2 2\n", (int)sizeof(struct A6), (int)_Alignof(struct A6));
printf("A7 = %d %d | 16 8\n", (int)sizeof(struct A7), (int)_Alignof(struct A7));
printf("A8 = %d %d | 8 8\n", (int)sizeof(struct A8), (int)_Alignof(struct A8));
printf("A9 = %d %d | 16 8\n", (int)sizeof(struct A9), (int)_Alignof(struct A9));
printf("A10 = %d %d | 2 2\n", (int)sizeof(struct A10), (int)_Alignof(struct A10));
printf("A11 = %d %d | 12 4\n", (int)sizeof(struct A11), (int)_Alignof(struct A11));
{
struct S9 s;
*(unsigned *)&s = 0;
s.b = 2; s.c = 3;
unsigned x = *(unsigned *)&s;
printf("S9 = x%x\n", x);
}
{
struct S14 s = { 1, 2, 3 };
*(long long *)&s = 0;
s.a = 1;
s.b = 2;
s.c = 3;
unsigned long long v = *(unsigned long long *)&s;
printf("S14 = x%llx\n", v);
}
{
struct S15 s = { 1,2,3 };
*(unsigned *)&s = 0;
s.a = 1; s.b = 2; s.c = 3;
unsigned x = *(unsigned *)&s;
printf("S15 = x%x\n", x);
}
{
struct S18 s;
printf("S18 = %d should be %d\n", (int)(&s.b - &s.a), is64bit() ? 8 : 4);
}
{
struct A0 s;
*(long long *)&s = 0;
s.a = 1; s.b = 15;
long long x = *(long long *)&s;
printf("A0 = x%llx\n", x);
}
return 0;
}