1 
2 /* A test of the alternative (redundant) encodings for {inc,dec}{w,l}. */
3 
4 #include "tests/asm.h"
5 #include <stdio.h>
6 
7 int r1,r2,r3,r4,r5,r6,r7,r8,a1,a2;
8 
9 extern void foo ( void );
10 asm("\n"
11 VG_SYM(foo) ":\n"
12 "\tpushl $0\n"
13 "\tpopfl\n"
14 "\tmovl " VG_SYM(a1) ",%eax\n"
15 "\tmovl " VG_SYM(a2) ",%edx\n"
16 
17 /* inc %eax */
18 "\t.byte 0xFF\n"
19 "\t.byte 0xC0\n"
20 
21 "\tmovl %eax," VG_SYM(r1) "\n"
22 "\tpushfl\n"
23 "\tpopl " VG_SYM(r2) "\n"
24 
25 /* inc %dx */
26 "\t.byte 0x66\n"
27 "\t.byte 0xFF\n"
28 "\t.byte 0xC2\n"
29 
30 "\tmovl %edx," VG_SYM(r3) "\n"
31 "\tpushfl\n"
32 "\tpopl " VG_SYM(r4) "\n"
33 
34 /* dec %edx */
35 "\t.byte 0xFF\n"
36 "\t.byte 0xCA\n"
37 
38 "\tmovl %edx," VG_SYM(r5) "\n"
39 "\tpushfl\n"
40 "\tpopl " VG_SYM(r6) "\n"
41 
42 /* dec %ax */
43 "\t.byte 0x66\n"
44 "\t.byte 0xFF\n"
45 "\t.byte 0xC8\n"
46 
47 "\tmovl %eax," VG_SYM(r7) "\n"
48 "\tpushfl\n"
49 "\tpopl " VG_SYM(r8) "\n"
50 
51 "\tret\n"
52 );
53 
54 int main ( void )
55 {
56   a1 = 0x77777777;
57   a2 = 0x88888888;
58   r1=r2=r3=r4=r5=r6=r7=r8=0;
59   foo();
60   printf("0x%08x\n",r1);
61   printf("0x%08x\n",r2);
62   printf("0x%08x\n",r3);
63   printf("0x%08x\n",r4);
64   printf("0x%08x\n",r5);
65   printf("0x%08x\n",r6);
66   printf("0x%08x\n",r7);
67   printf("0x%08x\n",r8);
68   return 0;
69 }
70