[INTERPRETER] Slightly better way to handle 3E/F2/F3 prefixes

ptitSeb · Dec 8, 2023 · 7fe38de · 7fe38de
1 parent 9803591
commit 7fe38de
Showing 1 changed file with 6 additions and 4 deletions.
diff --git a/src/emu/x86run.c b/src/emu/x86run.c
@@ -93,12 +93,14 @@ int Run(x86emu_t *emu, int step)
         opcode = F8;
 
         rep = 0;
-        while((opcode==0xF2) || (opcode==0xF3)) {
-            rep = opcode-0xF1;
+        while((opcode==0xF2) || (opcode==0xF3) || (opcode==0x3E)) {
+            switch (opcode) {
+                case 0xF2: rep = 1; break;
+                case 0xF3: rep = 2; break;
+                case 0x3E: /* ignored*/ break;
+            }
             opcode = F8;
         }
-        while((opcode==0x3E))   //Branch Taken Hint ignored
-            opcode = F8;
 
         switch(opcode) {