1 files changed, 129 insertions, 0 deletions
diff --git a/ARMeilleure/Instructions/InstEmitAlu32.cs b/ARMeilleure/Instructions/InstEmitAlu32.cs
new file mode 100644
index 00000000..79b0abbc
--- /dev/null
+++ b/ARMeilleure/Instructions/InstEmitAlu32.cs
@@ -0,0 +1,129 @@
+using ARMeilleure.Decoders;
+using ARMeilleure.IntermediateRepresentation;
+using ARMeilleure.State;
+using ARMeilleure.Translation;
+
+using static ARMeilleure.Instructions.InstEmitHelper;
+using static ARMeilleure.Instructions.InstEmitAluHelper;
+using static ARMeilleure.IntermediateRepresentation.OperandHelper;
+
+namespace ARMeilleure.Instructions
+{
+    static partial class InstEmit32
+    {
+        public static void Add(ArmEmitterContext context)
+        {
+            IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
+
+            Operand n = GetAluN(context);
+            Operand m = GetAluM(context, setCarry: false);
+
+            Operand res = context.Add(n, m);
+
+            if (op.SetFlags)
+            {
+                EmitNZFlagsCheck(context, res);
+
+                EmitAddsCCheck(context, n, res);
+                EmitAddsVCheck(context, n, m, res);
+            }
+
+            EmitAluStore(context, res);
+        }
+
+        public static void Cmp(ArmEmitterContext context)
+        {
+            IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
+
+            Operand n = GetAluN(context);
+            Operand m = GetAluM(context, setCarry: false);
+
+            Operand res = context.Subtract(n, m);
+
+            EmitNZFlagsCheck(context, res);
+
+            EmitSubsCCheck(context, n, res);
+            EmitSubsVCheck(context, n, m, res);
+        }
+
+        public static void Mov(ArmEmitterContext context)
+        {
+            IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
+
+            Operand m = GetAluM(context);
+
+            if (op.SetFlags)
+            {
+                EmitNZFlagsCheck(context, m);
+            }
+
+            EmitAluStore(context, m);
+        }
+
+        public static void Sub(ArmEmitterContext context)
+        {
+            IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
+
+            Operand n = GetAluN(context);
+            Operand m = GetAluM(context, setCarry: false);
+
+            Operand res = context.Subtract(n, m);
+
+            if (op.SetFlags)
+            {
+                EmitNZFlagsCheck(context, res);
+
+                EmitSubsCCheck(context, n, res);
+                EmitSubsVCheck(context, n, m, res);
+            }
+
+            EmitAluStore(context, res);
+        }
+
+        private static void EmitAluStore(ArmEmitterContext context, Operand value)
+        {
+            IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
+
+            if (op.Rd == RegisterAlias.Aarch32Pc)
+            {
+                if (op.SetFlags)
+                {
+                    // TODO: Load SPSR etc.
+                    Operand isThumb = GetFlag(PState.TFlag);
+
+                    Operand lblThumb = Label();
+
+                    context.BranchIfTrue(lblThumb, isThumb);
+
+                    context.Return(context.ZeroExtend32(OperandType.I64, context.BitwiseAnd(value, Const(~3))));
+
+                    context.MarkLabel(lblThumb);
+
+                    context.Return(context.ZeroExtend32(OperandType.I64, context.BitwiseAnd(value, Const(~1))));
+                }
+                else
+                {
+                    EmitAluWritePc(context, value);
+                }
+            }
+            else
+            {
+                SetIntA32(context, op.Rd, value);
+            }
+        }
+
+        private static void EmitAluWritePc(ArmEmitterContext context, Operand value)
+        {
+            context.StoreToContext();
+
+            if (IsThumb(context.CurrOp))
+            {
+                context.Return(context.ZeroExtend32(OperandType.I64, context.BitwiseAnd(value, Const(~1))));
+            }
+            else
+            {
+                EmitBxWritePc(context, value);
+            }
+        }
+    }
+}
+\ No newline at end of file