Split main project into core,graphics and chocolarm4 subproject (#29)

ChocolArm64/Instruction/AInstEmitFlow.cs

@@ -0,0 +1,124 @@
+using ChocolArm64.Decoder;
+using ChocolArm64.State;
+using ChocolArm64.Translation;
+using System.Reflection.Emit;
+
+namespace ChocolArm64.Instruction
+{
+    static partial class AInstEmit
+    {
+        public static void B(AILEmitterCtx Context)
+        {
+            AOpCodeBImmAl Op = (AOpCodeBImmAl)Context.CurrOp;
+
+            Context.Emit(OpCodes.Br, Context.GetLabel(Op.Imm));
+        }
+
+        public static void B_Cond(AILEmitterCtx Context)
+        {
+            AOpCodeBImmCond Op = (AOpCodeBImmCond)Context.CurrOp;
+
+            Context.EmitCondBranch(Context.GetLabel(Op.Imm), Op.Cond);
+        }
+
+        public static void Bl(AILEmitterCtx Context)
+        {
+            AOpCodeBImmAl Op = (AOpCodeBImmAl)Context.CurrOp;
+
+            Context.EmitLdc_I(Op.Position + 4);
+            Context.EmitStint(AThreadState.LRIndex);
+            Context.EmitStoreState();
+
+            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(Op.Position + 4);
+
+                AILLabel LblContinue = new AILLabel();
+
+                Context.Emit(OpCodes.Beq_S, LblContinue);
+                Context.Emit(OpCodes.Ret);
+
+                Context.MarkLabel(LblContinue);
+
+                Context.Emit(OpCodes.Pop);
+
+                if (Context.CurrBlock.Next != null)
+                {
+                    Context.EmitLoadState(Context.CurrBlock.Next);
+                }
+            }
+            else
+            {
+                Context.EmitLdc_I8(Op.Imm);
+
+                Context.Emit(OpCodes.Ret);
+            }
+        }
+
+        public static void Blr(AILEmitterCtx Context)
+        {
+            AOpCodeBReg Op = (AOpCodeBReg)Context.CurrOp;
+
+            Context.EmitLdc_I(Op.Position + 4);
+            Context.EmitStint(AThreadState.LRIndex);
+            Context.EmitStoreState();
+            Context.EmitLdintzr(Op.Rn);
+
+            Context.Emit(OpCodes.Ret);
+        }
+
+        public static void Br(AILEmitterCtx Context)
+        {
+            AOpCodeBReg Op = (AOpCodeBReg)Context.CurrOp;
+
+            Context.EmitStoreState();
+            Context.EmitLdintzr(Op.Rn);
+
+            Context.Emit(OpCodes.Ret);
+        }
+
+        public static void Cbnz(AILEmitterCtx Context) => EmitCb(Context, OpCodes.Bne_Un);
+        public static void Cbz(AILEmitterCtx Context)  => EmitCb(Context, OpCodes.Beq);
+
+        private static void EmitCb(AILEmitterCtx Context, OpCode ILOp)
+        {
+            AOpCodeBImmCmp Op = (AOpCodeBImmCmp)Context.CurrOp;
+
+            Context.EmitLdintzr(Op.Rt);
+            Context.EmitLdc_I(0);
+
+            Context.Emit(ILOp, Context.GetLabel(Op.Imm));
+        }
+
+        public static void Ret(AILEmitterCtx Context)
+        {
+            Context.EmitStoreState();
+            Context.EmitLdint(AThreadState.LRIndex);
+
+            Context.Emit(OpCodes.Ret);
+        }
+
+        public static void Tbnz(AILEmitterCtx Context) => EmitTb(Context, OpCodes.Bne_Un);
+        public static void Tbz(AILEmitterCtx Context)  => EmitTb(Context, OpCodes.Beq);
+
+        private static void EmitTb(AILEmitterCtx Context, OpCode ILOp)
+        {
+            AOpCodeBImmTest Op = (AOpCodeBImmTest)Context.CurrOp;
+
+            Context.EmitLdintzr(Op.Rt);
+            Context.EmitLdc_I(1L << Op.Pos);
+
+            Context.Emit(OpCodes.And);
+
+            Context.EmitLdc_I(0);
+
+            Context.Emit(ILOp, Context.GetLabel(Op.Imm));
+        }
+    }
+}