From e20d69ffb1f5676bb7960ac4d71c1013e4582149 Mon Sep 17 00:00:00 2001
From: Raymaekers Luca <luca@spacehb.net>
Date: Sun, 26 Oct 2025 15:15:41 +0100
Subject: checkpoint

---
 src/sim86.cpp | 39 ++++++++++++++++++++++++++++++++++++++-
 1 file changed, 38 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/sim86.cpp b/src/sim86.cpp
index e5480d7..7c444bd 100644
--- a/src/sim86.cpp
+++ b/src/sim86.cpp
@@ -157,7 +157,6 @@ Run8086(psize MemorySize, u8 *Memory)
         if(Decoded.Op)
         {
             u32 OldIPRegister = IPRegister;
-            IPRegister += Decoded.Size;
             
 #if SIM86_INTERNAL           
             printf("%s ;", Sim86_MnemonicFromOperationType(Decoded.Op));
@@ -300,6 +299,42 @@ Run8086(psize MemorySize, u8 *Memory)
                 }
 #endif
             }
+            else if(Decoded.Op == Op_ret)
+            {
+                printf("\n");
+                printf("STOPONRET: Return encountered at address %d.\n", IPRegister);
+                
+                break;
+            }
+            else if(Decoded.Op == Op_inc)
+            {
+                Assert(DestinationOperand->Type == Operand_Register);
+                Assert(SourceOperand->Type == Operand_None);
+                *Destination += 1;
+            }
+            else if(Decoded.Op == Op_test)
+            {
+                
+                Assert(DestinationOperand->Type == Operand_Register);
+                Assert(SourceOperand->Type == Operand_Register || SourceOperand->Type == Operand_Immediate);
+                
+                s32 Value =((Decoded.Flags & Inst_Wide) ? 
+                            (u16)((u16)*Destination & ((u16)*Source)) :
+                            (u8)((u8)*Destination & ((u8)*Source))); 
+                FlagsFromValue(&FlagsRegister, Decoded.Flags, Value);
+            }
+            else if(Decoded.Op == Op_xor)
+            {
+                
+                Assert(DestinationOperand->Type == Operand_Register);
+                Assert(SourceOperand->Type == Operand_Register || SourceOperand->Type == Operand_Immediate);
+                
+                s32 Value =((Decoded.Flags & Inst_Wide) ? 
+                            (u16)((u16)*Destination ^ ((u16)*Source)) :
+                            (u8)((u8)*Destination ^ ((u8)*Source))); 
+                FlagsFromValue(&FlagsRegister, Decoded.Flags, Value);
+                *Destination = Value;
+            }
             else if(Decoded.Op == Op_cmp)
             {
                 Assert(DestinationOperand->Type == Operand_Register);
@@ -361,6 +396,8 @@ Run8086(psize MemorySize, u8 *Memory)
                 Assert(0 && "Op not implemented yet.");
             }
             
+            IPRegister += Decoded.Size;
+            
 #if SIM86_INTERNAL
             printf(" ip:0x%x->0x%x", OldIPRegister, IPRegister);
 #endif
-- 
cgit v1.2.3-70-g09d2