4 files changed, 76 insertions, 9 deletions
diff --git a/ARMeilleure/Instructions/InstEmitFlow32.cs b/ARMeilleure/Instructions/InstEmitFlow32.cs
index 030713fb..19524b42 100644
--- a/ARMeilleure/Instructions/InstEmitFlow32.cs
+++ b/ARMeilleure/Instructions/InstEmitFlow32.cs
@@ -107,5 +107,30 @@ namespace ARMeilleure.Instructions
 
             context.SetIfThenBlockState(op.IfThenBlockConds);
         }
+
+        public static void Tbb(ArmEmitterContext context) => EmitTb(context, halfword: false);
+        public static void Tbh(ArmEmitterContext context)  => EmitTb(context, halfword: true);
+
+        private static void EmitTb(ArmEmitterContext context, bool halfword)
+        {
+            OpCodeT32Tb op = (OpCodeT32Tb)context.CurrOp;
+
+            Operand halfwords;
+
+            if (halfword)
+            {
+                Operand address = context.Add(GetIntA32(context, op.Rn), context.ShiftLeft(GetIntA32(context, op.Rm), Const(1)));
+                halfwords = InstEmitMemoryHelper.EmitReadInt(context, address, 1);
+            }
+            else
+            {
+                Operand address = context.Add(GetIntA32(context, op.Rn), GetIntA32(context, op.Rm));
+                halfwords = InstEmitMemoryHelper.EmitReadIntAligned(context, address, 0);
+            }
+
+            Operand targetAddress = context.Add(Const((int)op.GetPc()), context.ShiftLeft(halfwords, Const(1)));
+
+            EmitVirtualJump(context, targetAddress, isReturn: false);
+        }
     }
 }
 \ No newline at end of file
diff --git a/ARMeilleure/Instructions/InstEmitMemory32.cs b/ARMeilleure/Instructions/InstEmitMemory32.cs
index e15f6a5b..17ec97aa 100644
--- a/ARMeilleure/Instructions/InstEmitMemory32.cs
+++ b/ARMeilleure/Instructions/InstEmitMemory32.cs
@@ -204,15 +204,15 @@ namespace ARMeilleure.Instructions
 
                     context.BranchIfTrue(lblBigEndian, GetFlag(PState.EFlag));
 
-                    Load(op.Rt,     0, WordSizeLog2);
-                    Load(op.Rt | 1, 4, WordSizeLog2);
+                    Load(op.Rt, 0, WordSizeLog2);
+                    Load(op.Rt2, 4, WordSizeLog2);
 
                     context.Branch(lblEnd);
 
                     context.MarkLabel(lblBigEndian);
 
-                    Load(op.Rt | 1, 0, WordSizeLog2);
-                    Load(op.Rt,     4, WordSizeLog2);
+                    Load(op.Rt2, 0, WordSizeLog2);
+                    Load(op.Rt, 4, WordSizeLog2);
 
                     context.MarkLabel(lblEnd);
                 }
@@ -237,15 +237,15 @@ namespace ARMeilleure.Instructions
 
                     context.BranchIfTrue(lblBigEndian, GetFlag(PState.EFlag));
 
-                    Store(op.Rt,     0, WordSizeLog2);
-                    Store(op.Rt | 1, 4, WordSizeLog2);
+                    Store(op.Rt, 0, WordSizeLog2);
+                    Store(op.Rt2, 4, WordSizeLog2);
 
                     context.Branch(lblEnd);
 
                     context.MarkLabel(lblBigEndian);
 
-                    Store(op.Rt | 1, 0, WordSizeLog2);
-                    Store(op.Rt,     4, WordSizeLog2);
+                    Store(op.Rt2, 0, WordSizeLog2);
+                    Store(op.Rt, 4, WordSizeLog2);
 
                     context.MarkLabel(lblEnd);
                 }
diff --git a/ARMeilleure/Instructions/InstEmitMemoryHelper.cs b/ARMeilleure/Instructions/InstEmitMemoryHelper.cs
index 2877d53e..f97e395c 100644
--- a/ARMeilleure/Instructions/InstEmitMemoryHelper.cs
+++ b/ARMeilleure/Instructions/InstEmitMemoryHelper.cs
@@ -123,6 +123,41 @@ namespace ARMeilleure.Instructions
                    context.CurrOp is OpCodeSimdMemSs);
         }
 
+        public static Operand EmitReadInt(ArmEmitterContext context, Operand address, int size)
+        {
+            Operand temp = context.AllocateLocal(size == 3 ? OperandType.I64 : OperandType.I32);
+
+            Operand lblSlowPath = Label();
+            Operand lblEnd      = Label();
+
+            Operand physAddr = EmitPtPointerLoad(context, address, lblSlowPath, write: false, size);
+
+            Operand value = default;
+
+            switch (size)
+            {
+                case 0: value = context.Load8 (physAddr);                  break;
+                case 1: value = context.Load16(physAddr);                  break;
+                case 2: value = context.Load  (OperandType.I32, physAddr); break;
+                case 3: value = context.Load  (OperandType.I64, physAddr); break;
+            }
+
+            context.Copy(temp, value);
+
+            if (!context.Memory.Type.IsHostMapped())
+            {
+                context.Branch(lblEnd);
+
+                context.MarkLabel(lblSlowPath, BasicBlockFrequency.Cold);
+
+                context.Copy(temp, EmitReadIntFallback(context, address, size));
+
+                context.MarkLabel(lblEnd);
+            }
+
+            return temp;
+        }
+
         private static void EmitReadInt(ArmEmitterContext context, Operand address, int rt, int size)
         {
             Operand lblSlowPath = Label();
@@ -420,6 +455,11 @@ namespace ARMeilleure.Instructions
 
         private static void EmitReadIntFallback(ArmEmitterContext context, Operand address, int rt, int size)
         {
+            SetInt(context, rt, EmitReadIntFallback(context, address, size));
+        }
+
+        private static Operand EmitReadIntFallback(ArmEmitterContext context, Operand address, int size)
+        {
             MethodInfo info = null;
 
             switch (size)
@@ -430,7 +470,7 @@ namespace ARMeilleure.Instructions
                 case 3: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.ReadUInt64)); break;
             }
 
-            SetInt(context, rt, context.Call(info, address));
+            return context.Call(info, address);
         }
 
         private static void EmitReadVectorFallback(
diff --git a/ARMeilleure/Instructions/InstName.cs b/ARMeilleure/Instructions/InstName.cs
index 0d63820b..f2c95ae9 100644
--- a/ARMeilleure/Instructions/InstName.cs
+++ b/ARMeilleure/Instructions/InstName.cs
@@ -545,6 +545,8 @@ namespace ARMeilleure.Instructions
         Strexh,
         Strh,
         Sxtb16,
+        Tbb,
+        Tbh,
         Teq,
         Trap,
         Tst,