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      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