FIX: Bad Code Generated for Inline Assembly Using Enumerators

   void main()
   {
   enum { FALL=1, WINTER, SPRING, SUMMER };

   _asm {
        mov eax, WINTER  ; <--- This will incorrectly load 'eax'
                          ;      with something other than 2.
        }
   }
				

MORE INFORMATION

This problem will impact developers that are using the Microsoft Windows 95 Device Driver Kit (DDK) or other tools that are used to build VXD drivers with C/C++. The DDK provides C/C++ header files that use enumerators and inline assembly in this fashion.

There are no workarounds for this problem. The following are possible alternatives if the developer is at liberty to modify the source code:

   void main()
   {

   #define FALL   1
   #define WINTER 2
   #define SPRING 3
   #define SUMMER 4

   _asm {
        mov eax, WINTER
        }
   }
				

The drawback to the #define directive method is that it has no scope. Another method that does have scope is this:

   void main()
   {

   const int FALL   = 1,
             WINTER = 2,
             SPRING = 3,
             SUMMER = 4;

   _asm {
        mov eax, WINTER
        }
   }