1 files changed, 39 insertions, 0 deletions
diff --git a/ChocolArm64/Instructions/InstEmitFlowHelper.cs b/ChocolArm64/Instructions/InstEmitFlowHelper.cs
new file mode 100644
index 00000000..cf093bb3
--- /dev/null
+++ b/ChocolArm64/Instructions/InstEmitFlowHelper.cs
@@ -0,0 +1,39 @@
+using ChocolArm64.Translation;
+using System.Reflection.Emit;
+
+namespace ChocolArm64.Instructions
+{
+    static class InstEmitFlowHelper
+    {
+        public static void EmitCall(ILEmitterCtx context, long imm)
+        {
+            if (context.TryOptEmitSubroutineCall())
+            {
+                //Note: the return value of the called method will be placed
+                //at the Stack, the return value is always a Int64 with the
+                //return address of the function. We check if the address is
+                //correct, if it isn't we keep returning until we reach the dispatcher.
+                context.Emit(OpCodes.Dup);
+
+                context.EmitLdc_I8(context.CurrOp.Position + 4);
+
+                ILLabel lblContinue = new ILLabel();
+
+                context.Emit(OpCodes.Beq_S, lblContinue);
+                context.Emit(OpCodes.Ret);
+
+                context.MarkLabel(lblContinue);
+
+                context.Emit(OpCodes.Pop);
+
+                context.EmitLoadState();
+            }
+            else
+            {
+                context.EmitLdc_I8(imm);
+
+                context.Emit(OpCodes.Ret);
+            }
+        }
+    }
+}