1extern void abort (void);
2
3typedef union i386_operand_type
4{
5  struct
6    {
7      unsigned int reg8:1;
8      unsigned int reg16:1;
9      unsigned int reg32:1;
10      unsigned int reg64:1;
11      unsigned int floatreg:1;
12      unsigned int regmmx:1;
13      unsigned int regxmm:1;
14      unsigned int regymm:1;
15      unsigned int control:1;
16      unsigned int debug:1;
17      unsigned int test:1;
18      unsigned int sreg2:1;
19      unsigned int sreg3:1;
20      unsigned int imm1:1;
21      unsigned int imm8:1;
22      unsigned int imm8s:1;
23      unsigned int imm16:1;
24      unsigned int imm32:1;
25      unsigned int imm32s:1;
26      unsigned int imm64:1;
27      unsigned int disp8:1;
28      unsigned int disp16:1;
29      unsigned int disp32:1;
30      unsigned int disp32s:1;
31      unsigned int disp64:1;
32      unsigned int acc:1;
33      unsigned int floatacc:1;
34      unsigned int baseindex:1;
35      unsigned int inoutportreg:1;
36      unsigned int shiftcount:1;
37      unsigned int jumpabsolute:1;
38      unsigned int esseg:1;
39      unsigned int regmem:1;
40      unsigned int mem:1;
41      unsigned int byte:1;
42      unsigned int word:1;
43      unsigned int dword:1;
44      unsigned int fword:1;
45      unsigned int qword:1;
46      unsigned int tbyte:1;
47      unsigned int xmmword:1;
48      unsigned int ymmword:1;
49      unsigned int unspecified:1;
50      unsigned int anysize:1;
51    } bitfield;
52  unsigned int array[2];
53} i386_operand_type;
54
55unsigned int x00, x01, y00, y01;
56
57int main (int argc, char *argv[])
58{
59  i386_operand_type a,b,c,d;
60
61  a.bitfield.reg16 = 1;
62  a.bitfield.imm16 = 0;
63  a.array[1] = 22;
64
65  b = a;
66  x00 = b.array[0];
67  x01 = b.array[1];
68
69  c = b;
70  y00 = c.array[0];
71  y01 = c.array[1];
72
73  d = c;
74  if (d.bitfield.reg16 != 1)
75    abort();
76  if (d.bitfield.imm16 != 0)
77    abort();
78  if (d.array[1] != 22)
79    abort();
80
81  return 0;
82}
83