diff options
| author | Raymaekers Luca <luca@spacehb.net> | 2025-10-26 15:15:41 +0100 |
|---|---|---|
| committer | Raymaekers Luca <luca@spacehb.net> | 2025-10-26 15:15:41 +0100 |
| commit | e20d69ffb1f5676bb7960ac4d71c1013e4582149 (patch) | |
| tree | 1531cf9786c6b37d799ef623f837a3fea09873c0 /src | |
| parent | aa4bfe45dcb21444ccb54da5c90661410be36676 (diff) | |
checkpoint
Diffstat (limited to 'src')
| -rw-r--r-- | src/sim86.cpp | 39 |
1 files changed, 38 insertions, 1 deletions
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 |