[FAST486]

- Fix the privilege checks.
- Store the CPL in a special field, so that it doesn't get mixed up
  with the lowest 2 bits of real mode selectors while switching
  into protected mode.
- Reset the exception count after a successful ISR call.
- In Fast486OpcodeGroup0F01, check for prefix overrides after parsing
  the Mod-Reg-R/M, which might add a SS: prefix override in some cases.


svn path=/branches/ntvdm/; revision=60995

lib/fast486/opgroups.c

@@ -1668,6 +1668,12 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeGroup0F01)
     NO_LOCK_PREFIX();
     TOGGLE_ADSIZE(AddressSize);
 
+    if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
+    {
+        /* Exception occurred */
+        return FALSE;
+    }
+
     /* Check for the segment override */
     if (State->PrefixFlags & FAST486_PREFIX_SEG)
     {
@@ -1675,12 +1681,6 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeGroup0F01)
         Segment = State->SegmentOverride;
     }
 
-    if (!Fast486ParseModRegRm(State, AddressSize, &ModRegRm))
-    {
-        /* Exception occurred */
-        return FALSE;
-    }
-
     /* Check which operation this is */
     switch (ModRegRm.Register)
     {