1 files changed, 80 insertions, 0 deletions
diff --git a/ChocolArm64/Instruction/AInstEmitMul.cs b/ChocolArm64/Instruction/AInstEmitMul.cs
new file mode 100644
index 00000000..3713c81f
--- /dev/null
+++ b/ChocolArm64/Instruction/AInstEmitMul.cs
@@ -0,0 +1,80 @@
+using ChocolArm64.Decoder;
+using ChocolArm64.Translation;
+using System.Reflection.Emit;
+
+namespace ChocolArm64.Instruction
+{
+    static partial class AInstEmit
+    {
+        public static void Madd(AILEmitterCtx Context) => EmitMul(Context, OpCodes.Add);
+        public static void Msub(AILEmitterCtx Context) => EmitMul(Context, OpCodes.Sub);
+
+        private static void EmitMul(AILEmitterCtx Context, OpCode ILOp)
+        {
+            AOpCodeMul Op = (AOpCodeMul)Context.CurrOp;
+
+            Context.EmitLdintzr(Op.Ra);
+            Context.EmitLdintzr(Op.Rn);
+            Context.EmitLdintzr(Op.Rm);
+
+            Context.Emit(OpCodes.Mul);
+            Context.Emit(ILOp);
+
+            Context.EmitStintzr(Op.Rd);
+        }
+
+        public static void Smaddl(AILEmitterCtx Context) => EmitMull(Context, OpCodes.Add, true);
+        public static void Smsubl(AILEmitterCtx Context) => EmitMull(Context, OpCodes.Sub, true);
+        public static void Umaddl(AILEmitterCtx Context) => EmitMull(Context, OpCodes.Add, false);
+        public static void Umsubl(AILEmitterCtx Context) => EmitMull(Context, OpCodes.Sub, false);
+
+        private static void EmitMull(AILEmitterCtx Context, OpCode AddSubOp, bool Signed)
+        {
+            AOpCodeMul Op = (AOpCodeMul)Context.CurrOp;
+
+            OpCode CastOp = Signed
+                ? OpCodes.Conv_I8
+                : OpCodes.Conv_U8;
+
+            Context.EmitLdintzr(Op.Ra);
+            Context.EmitLdintzr(Op.Rn);
+
+            Context.Emit(OpCodes.Conv_I4);
+            Context.Emit(CastOp);
+
+            Context.EmitLdintzr(Op.Rm);
+
+            Context.Emit(OpCodes.Conv_I4);
+            Context.Emit(CastOp);
+            Context.Emit(OpCodes.Mul);
+
+            Context.Emit(AddSubOp);
+
+            Context.EmitStintzr(Op.Rd);
+        }
+
+        public static void Smulh(AILEmitterCtx Context)
+        {
+            AOpCodeMul Op = (AOpCodeMul)Context.CurrOp;
+
+            Context.EmitLdintzr(Op.Rn);
+            Context.EmitLdintzr(Op.Rm);
+
+            ASoftFallback.EmitCall(Context, nameof(ASoftFallback.SMulHi128));
+
+            Context.EmitStintzr(Op.Rd);
+        }
+
+        public static void Umulh(AILEmitterCtx Context)
+        {
+            AOpCodeMul Op = (AOpCodeMul)Context.CurrOp;
+
+            Context.EmitLdintzr(Op.Rn);
+            Context.EmitLdintzr(Op.Rm);
+
+            ASoftFallback.EmitCall(Context, nameof(ASoftFallback.UMulHi128));
+
+            Context.EmitStintzr(Op.Rd);
+        }
+    }
+}
+\ No newline at end of file