Add TRN1 & TRN2 (vector) instructions. Add 4 simple tests (4S, 8B). (#77)

* Update AOpCodeTable.cs

* Update AInstEmitSimdMove.cs

* Update CpuTestSimdMove.cs

* Update AInstEmitSimdMove.cs

* Update CpuTestSimdMove.cs

1 files changed, 34 insertions, 1 deletions

diff --git a/ChocolArm64/Instruction/AInstEmitSimdMove.cs b/ChocolArm64/Instruction/AInstEmitSimdMove.cs
index 80f41787..20268d58 100644
--- a/ChocolArm64/Instruction/AInstEmitSimdMove.cs
+++ b/ChocolArm64/Instruction/AInstEmitSimdMove.cs
@@ -256,6 +256,16 @@ namespace ChocolArm64.Instruction
             Context.EmitStvec(Op.Rd);
         }
 
+        public static void Trn1_V(AILEmitterCtx Context)
+        {
+            EmitVectorTranspose(Context, Part: 0);
+        }
+
+        public static void Trn2_V(AILEmitterCtx Context)
+        {
+            EmitVectorTranspose(Context, Part: 1);
+        }
+
         public static void Umov_S(AILEmitterCtx Context)
         {
             AOpCodeSimdIns Op = (AOpCodeSimdIns)Context.CurrOp;
@@ -315,6 +325,29 @@ namespace ChocolArm64.Instruction
             }
         }
 
+        private static void EmitVectorTranspose(AILEmitterCtx Context, int Part)
+        {
+            AOpCodeSimdReg Op = (AOpCodeSimdReg)Context.CurrOp;
+
+            int Bytes = Context.CurrOp.GetBitsCount() >> 3;
+
+            int Elems = Bytes >> Op.Size;
+
+            for (int Index = 0; Index < Elems; Index++)
+            {
+                int Elem = (Index & ~1) + Part;
+
+                EmitVectorExtractZx(Context, (Index & 1) == 0 ? Op.Rn : Op.Rm, Elem, Op.Size);
+
+                EmitVectorInsert(Context, Op.Rd, Index, Op.Size);
+            }
+
+            if (Op.RegisterSize == ARegisterSize.SIMD64)
+            {
+                EmitVectorZeroUpper(Context, Op.Rd);
+            }
+        }
+
         private static void EmitVectorUnzip(AILEmitterCtx Context, int Part)
         {
             AOpCodeSimdReg Op = (AOpCodeSimdReg)Context.CurrOp;
@@ -363,4 +396,4 @@ namespace ChocolArm64.Instruction
             }
         }
     }
-}
\ No newline at end of file
+}