Add ADDHN{2}, RADDHN{2}, SUBHN{2}, RSUBHN{2} (vector) instructions. Add 8 Tests. (#92)

* Update AOpCodeTable.cs

* Update AInstEmitSimdArithmetic.cs

* Update Pseudocode.cs

* Update Instructions.cs

* Update Bits.cs

* Create CpuTestSimd.cs

* Create CpuTestSimdReg.cs

* Update CpuTestSimd.cs

Provide a better supply of input values for the 20 Simd Tests.

* Update CpuTestSimdReg.cs

Provide a better supply of input values for the 20 Simd Tests.

* Update AOpCodeTable.cs

* Update AInstEmitSimdArithmetic.cs

* Update CpuTestSimd.cs

* Update CpuTestSimdReg.cs

7 files changed, 1410 insertions, 17 deletions

diff --git a/ChocolArm64/AOpCodeTable.cs b/ChocolArm64/AOpCodeTable.cs
index fb74f892..154affec 100644
--- a/ChocolArm64/AOpCodeTable.cs
+++ b/ChocolArm64/AOpCodeTable.cs
@@ -137,6 +137,7 @@ namespace ChocolArm64
             Set("0>001110<<100000101110xxxxxxxxxx", AInstEmit.Abs_V,         typeof(AOpCodeSimd));
             Set("01011110111xxxxx100001xxxxxxxxxx", AInstEmit.Add_S,         typeof(AOpCodeSimdReg));
             Set("0>001110<<1xxxxx100001xxxxxxxxxx", AInstEmit.Add_V,         typeof(AOpCodeSimdReg));
+            Set("0x001110<<1xxxxx010000xxxxxxxxxx", AInstEmit.Addhn_V,       typeof(AOpCodeSimdReg));
             Set("01011110xx110001101110xxxxxxxxxx", AInstEmit.Addp_S,        typeof(AOpCodeSimd));
             Set("0>001110<<1xxxxx101111xxxxxxxxxx", AInstEmit.Addp_V,        typeof(AOpCodeSimdReg));
             Set("000011100x110001101110xxxxxxxxxx", AInstEmit.Addv_V,        typeof(AOpCodeSimd));
@@ -290,7 +291,9 @@ namespace ChocolArm64
             Set("0x10111000100000010110xxxxxxxxxx", AInstEmit.Not_V,         typeof(AOpCodeSimd));
             Set("0x001110101xxxxx000111xxxxxxxxxx", AInstEmit.Orr_V,         typeof(AOpCodeSimdReg));
             Set("0x00111100000xxx<<x101xxxxxxxxxx", AInstEmit.Orr_Vi,        typeof(AOpCodeSimdImm));
+            Set("0x101110<<1xxxxx010000xxxxxxxxxx", AInstEmit.Raddhn_V,      typeof(AOpCodeSimdReg));
             Set("0x001110<<100000000010xxxxxxxxxx", AInstEmit.Rev64_V,       typeof(AOpCodeSimd));
+            Set("0x101110<<1xxxxx011000xxxxxxxxxx", AInstEmit.Rsubhn_V,      typeof(AOpCodeSimdReg));
             Set("0x001110<<1xxxxx000100xxxxxxxxxx", AInstEmit.Saddw_V,       typeof(AOpCodeSimdReg));
             Set("x0011110xx100010000000xxxxxxxxxx", AInstEmit.Scvtf_Gp,      typeof(AOpCodeSimdCvt));
             Set("010111100x100001110110xxxxxxxxxx", AInstEmit.Scvtf_S,       typeof(AOpCodeSimd));
@@ -321,6 +324,7 @@ namespace ChocolArm64
             Set("xx111100x01xxxxxxxxx10xxxxxxxxxx", AInstEmit.Str,           typeof(AOpCodeSimdMemReg));
             Set("01111110111xxxxx100001xxxxxxxxxx", AInstEmit.Sub_S,         typeof(AOpCodeSimdReg));
             Set("0>101110<<1xxxxx100001xxxxxxxxxx", AInstEmit.Sub_V,         typeof(AOpCodeSimdReg));
+            Set("0x001110<<1xxxxx011000xxxxxxxxxx", AInstEmit.Subhn_V,       typeof(AOpCodeSimdReg));
             Set("0x001110000xxxxx0xx000xxxxxxxxxx", AInstEmit.Tbl_V,         typeof(AOpCodeSimdTbl));
             Set("0>001110<<0xxxxx001010xxxxxxxxxx", AInstEmit.Trn1_V,        typeof(AOpCodeSimdReg));
             Set("0>001110<<0xxxxx011010xxxxxxxxxx", AInstEmit.Trn2_V,        typeof(AOpCodeSimdReg));
diff --git a/ChocolArm64/Instruction/AInstEmitSimdArithmetic.cs b/ChocolArm64/Instruction/AInstEmitSimdArithmetic.cs
index 6b65c156..2dce7410 100644
--- a/ChocolArm64/Instruction/AInstEmitSimdArithmetic.cs
+++ b/ChocolArm64/Instruction/AInstEmitSimdArithmetic.cs
@@ -26,7 +26,6 @@ namespace ChocolArm64.Instruction
             AILLabel LblTrue = new AILLabel();
 
             Context.Emit(OpCodes.Dup);
-
             Context.Emit(OpCodes.Ldc_I4_0);
             Context.Emit(OpCodes.Bge_S, LblTrue);
 
@@ -45,6 +44,11 @@ namespace ChocolArm64.Instruction
             EmitVectorBinaryOpZx(Context, () => Context.Emit(OpCodes.Add));
         }
 
+        public static void Addhn_V(AILEmitterCtx Context)
+        {
+            EmitHighNarrow(Context, () => Context.Emit(OpCodes.Add), Round: false);
+        }
+
         public static void Addp_S(AILEmitterCtx Context)
         {
             AOpCodeSimd Op = (AOpCodeSimd)Context.CurrOp;
@@ -130,6 +134,40 @@ namespace ChocolArm64.Instruction
             }
         }
 
+        private static void EmitHighNarrow(AILEmitterCtx Context, Action Emit, bool Round)
+        {
+            AOpCodeSimdReg Op = (AOpCodeSimdReg)Context.CurrOp;
+
+            int Elems = 8 >> Op.Size;
+            int ESize = 8 << Op.Size;
+
+            int Part = Op.RegisterSize == ARegisterSize.SIMD128 ? Elems : 0;
+
+            for (int Index = 0; Index < Elems; Index++)
+            {
+                EmitVectorExtractZx(Context, Op.Rn, Index, Op.Size + 1);
+                EmitVectorExtractZx(Context, Op.Rm, Index, Op.Size + 1);
+
+                Emit();
+
+                if (Round)
+                {
+                    Context.EmitLdc_I8(1L << (ESize - 1));
+
+                    Context.Emit(OpCodes.Add);
+                }
+
+                Context.EmitLsr(ESize);
+
+                EmitVectorInsert(Context, Op.Rd, Part + Index, Op.Size);
+            }
+
+            if (Part == 0)
+            {
+                EmitVectorZeroUpper(Context, Op.Rd);
+            }
+        }
+
         public static void Fabd_S(AILEmitterCtx Context)
         {
             EmitScalarBinaryOpF(Context, () =>
@@ -849,6 +887,16 @@ namespace ChocolArm64.Instruction
             EmitVectorUnaryOpSx(Context, () => Context.Emit(OpCodes.Neg));
         }
 
+        public static void Raddhn_V(AILEmitterCtx Context)
+        {
+            EmitHighNarrow(Context, () => Context.Emit(OpCodes.Add), Round: true);
+        }
+
+        public static void Rsubhn_V(AILEmitterCtx Context)
+        {
+            EmitHighNarrow(Context, () => Context.Emit(OpCodes.Sub), Round: true);
+        }
+
         public static void Saddw_V(AILEmitterCtx Context)
         {
             EmitVectorWidenRmBinaryOpSx(Context, () => Context.Emit(OpCodes.Add));
@@ -896,6 +944,11 @@ namespace ChocolArm64.Instruction
             EmitVectorBinaryOpZx(Context, () => Context.Emit(OpCodes.Sub));
         }
 
+        public static void Subhn_V(AILEmitterCtx Context)
+        {
+            EmitHighNarrow(Context, () => Context.Emit(OpCodes.Sub), Round: false);
+        }
+
         public static void Uabd_V(AILEmitterCtx Context)
         {
             EmitVectorBinaryOpZx(Context, () => EmitAbd(Context));
diff --git a/Ryujinx.Tests/Cpu/CpuTestSimd.cs b/Ryujinx.Tests/Cpu/CpuTestSimd.cs
new file mode 100644
index 00000000..9107a8f8
--- /dev/null
+++ b/Ryujinx.Tests/Cpu/CpuTestSimd.cs
@@ -0,0 +1,166 @@
+#define Simd
+
+using ChocolArm64.State;
+
+using NUnit.Framework;
+
+namespace Ryujinx.Tests.Cpu
+{
+    using Tester;
+    using Tester.Types;
+
+    [Category("Simd")]
+    public sealed class CpuTestSimd : CpuTest
+    {
+#if Simd
+        [SetUp]
+        public void SetupTester()
+        {
+            AArch64.TakeReset(false);
+        }
+
+#region "ValueSource"
+        private static ulong[] _D_()
+        {
+            return new ulong[] { 0x0000000000000000ul, 0x7FFFFFFFFFFFFFFFul,
+                                 0x8000000000000000ul, 0xFFFFFFFFFFFFFFFFul };
+        }
+
+        private static ulong[] _8B4H2S_()
+        {
+            return new ulong[] { 0x0000000000000000ul, 0x7F7F7F7F7F7F7F7Ful,
+                                 0x8080808080808080ul, 0x7FFF7FFF7FFF7FFFul,
+                                 0x8000800080008000ul, 0x7FFFFFFF7FFFFFFFul,
+                                 0x8000000080000000ul, 0xFFFFFFFFFFFFFFFFul };
+        }
+
+        private static ulong[] _16B8H4S2D_()
+        {
+            return new ulong[] { 0x0000000000000000ul, 0x7F7F7F7F7F7F7F7Ful,
+                                 0x8080808080808080ul, 0x7FFF7FFF7FFF7FFFul,
+                                 0x8000800080008000ul, 0x7FFFFFFF7FFFFFFFul,
+                                 0x8000000080000000ul, 0x7FFFFFFFFFFFFFFFul,
+                                 0x8000000000000000ul, 0xFFFFFFFFFFFFFFFFul };
+        }
+#endregion
+
+        [Test, Description("ABS <V><d>, <V><n>")]
+        public void Abs_S_D([ValueSource("_D_")] [Random(1)] ulong A)
+        {
+            uint Opcode = 0x5EE0B820; // ABS D0, D1
+            Bits Op = new Bits(Opcode);
+
+            AVec V0 = new AVec { X1 = TestContext.CurrentContext.Random.NextULong() };
+            AVec V1 = new AVec { X0 = A };
+            AThreadState ThreadState = SingleOpcode(Opcode, V0: V0, V1: V1);
+
+            AArch64.V(1, new Bits(A));
+            SimdFp.Abs_S(Op[23, 22], Op[9, 5], Op[4, 0]);
+
+            Assert.That(ThreadState.V0.X0, Is.EqualTo(AArch64.V(64, 0).ToUInt64()));
+            Assert.That(ThreadState.V0.X1, Is.Zero);
+        }
+
+        [Test, Description("ABS <Vd>.<T>, <Vn>.<T>")]
+        public void Abs_V_8B_4H_2S([ValueSource("_8B4H2S_")] [Random(1)] ulong A,
+                                   [Values(0b00u, 0b01u, 0b10u)] uint size) // <8B, 4H, 2S>
+        {
+            uint Opcode = 0x0E20B820; // ABS V0.8B, V1.8B
+            Opcode |= ((size & 3) << 22);
+            Bits Op = new Bits(Opcode);
+
+            AVec V0 = new AVec { X1 = TestContext.CurrentContext.Random.NextULong() };
+            AVec V1 = new AVec { X0 = A };
+            AThreadState ThreadState = SingleOpcode(Opcode, V0: V0, V1: V1);
+
+            AArch64.V(1, new Bits(A));
+            SimdFp.Abs_V(Op[30], Op[23, 22], Op[9, 5], Op[4, 0]);
+
+            Assert.That(ThreadState.V0.X0, Is.EqualTo(AArch64.V(64, 0).ToUInt64()));
+            Assert.That(ThreadState.V0.X1, Is.Zero);
+        }
+
+        [Test, Pairwise, Description("ABS <Vd>.<T>, <Vn>.<T>")]
+        public void Abs_V_16B_8H_4S_2D([ValueSource("_16B8H4S2D_")] [Random(1)] ulong A0,
+                                       [ValueSource("_16B8H4S2D_")] [Random(1)] ulong A1,
+                                       [Values(0b00u, 0b01u, 0b10u, 0b11u)] uint size) // <16B, 8H, 4S, 2D>
+        {
+            uint Opcode = 0x4E20B820; // ABS V0.16B, V1.16B
+            Opcode |= ((size & 3) << 22);
+            Bits Op = new Bits(Opcode);
+
+            AVec V1 = new AVec { X0 = A0, X1 = A1 };
+            AThreadState ThreadState = SingleOpcode(Opcode, V1: V1);
+
+            AArch64.Vpart(1, 0, new Bits(A0));
+            AArch64.Vpart(1, 1, new Bits(A1));
+            SimdFp.Abs_V(Op[30], Op[23, 22], Op[9, 5], Op[4, 0]);
+
+            Assert.Multiple(() =>
+            {
+                Assert.That(ThreadState.V0.X0, Is.EqualTo(AArch64.Vpart(64, 0, 0).ToUInt64()));
+                Assert.That(ThreadState.V0.X1, Is.EqualTo(AArch64.Vpart(64, 0, 1).ToUInt64()));
+            });
+        }
+
+        [Test, Description("NEG <V><d>, <V><n>")]
+        public void Neg_S_D([ValueSource("_D_")] [Random(1)] ulong A)
+        {
+            uint Opcode = 0x7EE0B820; // NEG D0, D1
+            Bits Op = new Bits(Opcode);
+
+            AVec V0 = new AVec { X1 = TestContext.CurrentContext.Random.NextULong() };
+            AVec V1 = new AVec { X0 = A };
+            AThreadState ThreadState = SingleOpcode(Opcode, V0: V0, V1: V1);
+
+            AArch64.V(1, new Bits(A));
+            SimdFp.Neg_S(Op[23, 22], Op[9, 5], Op[4, 0]);
+
+            Assert.That(ThreadState.V0.X0, Is.EqualTo(AArch64.V(64, 0).ToUInt64()));
+            Assert.That(ThreadState.V0.X1, Is.Zero);
+        }
+
+        [Test, Description("NEG <Vd>.<T>, <Vn>.<T>")]
+        public void Neg_V_8B_4H_2S([ValueSource("_8B4H2S_")] [Random(1)] ulong A,
+                                   [Values(0b00u, 0b01u, 0b10u)] uint size) // <8B, 4H, 2S>
+        {
+            uint Opcode = 0x2E20B820; // NEG V0.8B, V1.8B
+            Opcode |= ((size & 3) << 22);
+            Bits Op = new Bits(Opcode);
+
+            AVec V0 = new AVec { X1 = TestContext.CurrentContext.Random.NextULong() };
+            AVec V1 = new AVec { X0 = A };
+            AThreadState ThreadState = SingleOpcode(Opcode, V0: V0, V1: V1);
+
+            AArch64.V(1, new Bits(A));
+            SimdFp.Neg_V(Op[30], Op[23, 22], Op[9, 5], Op[4, 0]);
+
+            Assert.That(ThreadState.V0.X0, Is.EqualTo(AArch64.V(64, 0).ToUInt64()));
+            Assert.That(ThreadState.V0.X1, Is.Zero);
+        }
+
+        [Test, Pairwise, Description("NEG <Vd>.<T>, <Vn>.<T>")]
+        public void Neg_V_16B_8H_4S_2D([ValueSource("_16B8H4S2D_")] [Random(1)] ulong A0,
+                                       [ValueSource("_16B8H4S2D_")] [Random(1)] ulong A1,
+                                       [Values(0b00u, 0b01u, 0b10u, 0b11u)] uint size) // <16B, 8H, 4S, 2D>
+        {
+            uint Opcode = 0x6E20B820; // NEG V0.16B, V1.16B
+            Opcode |= ((size & 3) << 22);
+            Bits Op = new Bits(Opcode);
+
+            AVec V1 = new AVec { X0 = A0, X1 = A1 };
+            AThreadState ThreadState = SingleOpcode(Opcode, V1: V1);
+
+            AArch64.Vpart(1, 0, new Bits(A0));
+            AArch64.Vpart(1, 1, new Bits(A1));
+            SimdFp.Neg_V(Op[30], Op[23, 22], Op[9, 5], Op[4, 0]);
+
+            Assert.Multiple(() =>
+            {
+                Assert.That(ThreadState.V0.X0, Is.EqualTo(AArch64.Vpart(64, 0, 0).ToUInt64()));
+                Assert.That(ThreadState.V0.X1, Is.EqualTo(AArch64.Vpart(64, 0, 1).ToUInt64()));
+            });
+        }
+#endif
+    }
+}
diff --git a/Ryujinx.Tests/Cpu/CpuTestSimdReg.cs b/Ryujinx.Tests/Cpu/CpuTestSimdReg.cs
new file mode 100644
index 00000000..04cef60f
--- /dev/null
+++ b/Ryujinx.Tests/Cpu/CpuTestSimdReg.cs
@@ -0,0 +1,432 @@
+#define SimdReg
+
+using ChocolArm64.State;
+
+using NUnit.Framework;
+
+namespace Ryujinx.Tests.Cpu
+{
+    using Tester;
+    using Tester.Types;
+
+    [Category("SimdReg")]
+    public sealed class CpuTestSimdReg : CpuTest
+    {
+#if SimdReg
+        [SetUp]
+        public void SetupTester()
+        {
+            AArch64.TakeReset(false);
+        }
+
+#region "ValueSource"
+        private static ulong[] _D_()
+        {
+            return new ulong[] { 0x0000000000000000ul, 0x7FFFFFFFFFFFFFFFul,
+                                 0x8000000000000000ul, 0xFFFFFFFFFFFFFFFFul };
+        }
+
+        private static ulong[] _8B4H2S_()
+        {
+            return new ulong[] { 0x0000000000000000ul, 0x7F7F7F7F7F7F7F7Ful,
+                                 0x8080808080808080ul, 0x7FFF7FFF7FFF7FFFul,
+                                 0x8000800080008000ul, 0x7FFFFFFF7FFFFFFFul,
+                                 0x8000000080000000ul, 0xFFFFFFFFFFFFFFFFul };
+        }
+
+        private static ulong[] _16B8H4S2D_()
+        {
+            return new ulong[] { 0x0000000000000000ul, 0x7F7F7F7F7F7F7F7Ful,
+                                 0x8080808080808080ul, 0x7FFF7FFF7FFF7FFFul,
+                                 0x8000800080008000ul, 0x7FFFFFFF7FFFFFFFul,
+                                 0x8000000080000000ul, 0x7FFFFFFFFFFFFFFFul,
+                                 0x8000000000000000ul, 0xFFFFFFFFFFFFFFFFul };
+        }
+
+        private static ulong[] _8H4S2D_()
+        {
+            return new ulong[] { 0x0000000000000000ul, 0x7FFF7FFF7FFF7FFFul,
+                                 0x8000800080008000ul, 0x7FFFFFFF7FFFFFFFul,
+                                 0x8000000080000000ul, 0x7FFFFFFFFFFFFFFFul,
+                                 0x8000000000000000ul, 0xFFFFFFFFFFFFFFFFul };
+        }
+#endregion
+
+        [Test, Description("ADD <V><d>, <V><n>, <V><m>")]
+        public void Add_S_D([ValueSource("_D_")] [Random(1)] ulong A,
+                            [ValueSource("_D_")] [Random(1)] ulong B)
+        {
+            uint Opcode = 0x5EE28420; // ADD D0, D1, D2
+            Bits Op = new Bits(Opcode);
+
+            AVec V0 = new AVec { X1 = TestContext.CurrentContext.Random.NextULong() };
+            AVec V1 = new AVec { X0 = A };
+            AVec V2 = new AVec { X0 = B };
+            AThreadState ThreadState = SingleOpcode(Opcode, V0: V0, V1: V1, V2: V2);
+
+            AArch64.V(1, new Bits(A));
+            AArch64.V(2, new Bits(B));
+            SimdFp.Add_S(Op[23, 22], Op[20, 16], Op[9, 5], Op[4, 0]);
+
+            Assert.That(ThreadState.V0.X0, Is.EqualTo(AArch64.V(64, 0).ToUInt64()));
+            Assert.That(ThreadState.V0.X1, Is.Zero);
+        }
+
+        [Test, Description("ADD <Vd>.<T>, <Vn>.<T>, <Vm>.<T>")]
+        public void Add_V_8B_4H_2S([ValueSource("_8B4H2S_")] [Random(1)] ulong A,
+                                   [ValueSource("_8B4H2S_")] [Random(1)] ulong B,
+                                   [Values(0b00u, 0b01u, 0b10u)] uint size) // <8B, 4H, 2S>
+        {
+            uint Opcode = 0x0E228420; // ADD V0.8B, V1.8B, V2.8B
+            Opcode |= ((size & 3) << 22);
+            Bits Op = new Bits(Opcode);
+
+            AVec V0 = new AVec { X1 = TestContext.CurrentContext.Random.NextULong() };
+            AVec V1 = new AVec { X0 = A };
+            AVec V2 = new AVec { X0 = B };
+            AThreadState ThreadState = SingleOpcode(Opcode, V0: V0, V1: V1, V2: V2);
+
+            AArch64.V(1, new Bits(A));
+            AArch64.V(2, new Bits(B));
+            SimdFp.Add_V(Op[30], Op[23, 22], Op[20, 16], Op[9, 5], Op[4, 0]);
+
+            Assert.That(ThreadState.V0.X0, Is.EqualTo(AArch64.V(64, 0).ToUInt64()));
+            Assert.That(ThreadState.V0.X1, Is.Zero);
+        }
+
+        [Test, Pairwise, Description("ADD <Vd>.<T>, <Vn>.<T>, <Vm>.<T>")]
+        public void Add_V_16B_8H_4S_2D([ValueSource("_16B8H4S2D_")] [Random(1)] ulong A0,
+                                       [ValueSource("_16B8H4S2D_")] [Random(1)] ulong A1,
+                                       [ValueSource("_16B8H4S2D_")] [Random(1)] ulong B0,
+                                       [ValueSource("_16B8H4S2D_")] [Random(1)] ulong B1,
+                                       [Values(0b00u, 0b01u, 0b10u, 0b11u)] uint size) // <16B, 8H, 4S, 2D>
+        {
+            uint Opcode = 0x4E228420; // ADD V0.16B, V1.16B, V2.16B
+            Opcode |= ((size & 3) << 22);
+            Bits Op = new Bits(Opcode);
+
+            AVec V1 = new AVec { X0 = A0, X1 = A1 };
+            AVec V2 = new AVec { X0 = B0, X1 = B1 };
+            AThreadState ThreadState = SingleOpcode(Opcode, V1: V1, V2: V2);
+
+            AArch64.Vpart(1, 0, new Bits(A0));
+            AArch64.Vpart(1, 1, new Bits(A1));
+            AArch64.Vpart(2, 0, new Bits(B0));
+            AArch64.Vpart(2, 1, new Bits(B1));
+            SimdFp.Add_V(Op[30], Op[23, 22], Op[20, 16], Op[9, 5], Op[4, 0]);
+
+            Assert.Multiple(() =>
+            {
+                Assert.That(ThreadState.V0.X0, Is.EqualTo(AArch64.Vpart(64, 0, 0).ToUInt64()));
+                Assert.That(ThreadState.V0.X1, Is.EqualTo(AArch64.Vpart(64, 0, 1).ToUInt64()));
+            });
+        }
+
+        [Test, Pairwise, Description("ADDHN{2} <Vd>.<Tb>, <Vn>.<Ta>, <Vm>.<Ta>")]
+        public void Addhn_V_8H8B_4S4H_2D2S([ValueSource("_8H4S2D_")] [Random(1)] ulong A0,
+                                           [ValueSource("_8H4S2D_")] [Random(1)] ulong A1,
+                                           [ValueSource("_8H4S2D_")] [Random(1)] ulong B0,
+                                           [ValueSource("_8H4S2D_")] [Random(1)] ulong B1,
+                                           [Values(0b00u, 0b01u, 0b10u)] uint size) // <8H8B, 4S4H, 2D2S>
+        {
+            uint Opcode = 0x0E224020; // ADDHN V0.8B, V1.8H, V2.8H
+            Opcode |= ((size & 3) << 22);
+            Bits Op = new Bits(Opcode);
+
+            AVec V0 = new AVec { X1 = TestContext.CurrentContext.Random.NextULong() };
+            AVec V1 = new AVec { X0 = A0, X1 = A1 };
+            AVec V2 = new AVec { X0 = B0, X1 = B1 };
+            AThreadState ThreadState = SingleOpcode(Opcode, V0: V0, V1: V1, V2: V2);
+
+            AArch64.Vpart(1, 0, new Bits(A0));
+            AArch64.Vpart(1, 1, new Bits(A1));
+            AArch64.Vpart(2, 0, new Bits(B0));
+            AArch64.Vpart(2, 1, new Bits(B1));
+            SimdFp.Addhn_V(Op[30], Op[23, 22], Op[20, 16], Op[9, 5], Op[4, 0]);
+
+            Assert.Multiple(() =>
+            {
+                Assert.That(ThreadState.V0.X0, Is.EqualTo(AArch64.V(64, 0).ToUInt64()));
+                Assert.That(ThreadState.V0.X1, Is.Zero);
+            });
+        }
+
+        [Test, Pairwise, Description("ADDHN{2} <Vd>.<Tb>, <Vn>.<Ta>, <Vm>.<Ta>")]
+        public void Addhn_V_8H16B_4S8H_2D4S([ValueSource("_8H4S2D_")] [Random(1)] ulong A0,
+                                            [ValueSource("_8H4S2D_")] [Random(1)] ulong A1,
+                                            [ValueSource("_8H4S2D_")] [Random(1)] ulong B0,
+                                            [ValueSource("_8H4S2D_")] [Random(1)] ulong B1,
+                                            [Values(0b00u, 0b01u, 0b10u)] uint size) // <8H16B, 4S8H, 2D4S>
+        {
+            uint Opcode = 0x4E224020; // ADDHN2 V0.16B, V1.8H, V2.8H
+            Opcode |= ((size & 3) << 22);
+            Bits Op = new Bits(Opcode);
+
+            ulong _X0 = TestContext.CurrentContext.Random.NextULong();
+            AVec V0 = new AVec { X0 = _X0 };
+            AVec V1 = new AVec { X0 = A0, X1 = A1 };
+            AVec V2 = new AVec { X0 = B0, X1 = B1 };
+            AThreadState ThreadState = SingleOpcode(Opcode, V0: V0, V1: V1, V2: V2);
+
+            AArch64.Vpart(1, 0, new Bits(A0));
+            AArch64.Vpart(1, 1, new Bits(A1));
+            AArch64.Vpart(2, 0, new Bits(B0));
+            AArch64.Vpart(2, 1, new Bits(B1));
+            SimdFp.Addhn_V(Op[30], Op[23, 22], Op[20, 16], Op[9, 5], Op[4, 0]);
+
+            Assert.Multiple(() =>
+            {
+                Assert.That(ThreadState.V0.X0, Is.EqualTo(_X0));
+                Assert.That(ThreadState.V0.X1, Is.EqualTo(AArch64.Vpart(64, 0, 1).ToUInt64()));
+            });
+        }
+
+        [Test, Pairwise, Description("RADDHN{2} <Vd>.<Tb>, <Vn>.<Ta>, <Vm>.<Ta>")]
+        public void Raddhn_V_8H8B_4S4H_2D2S([ValueSource("_8H4S2D_")] [Random(1)] ulong A0,
+                                            [ValueSource("_8H4S2D_")] [Random(1)] ulong A1,
+                                            [ValueSource("_8H4S2D_")] [Random(1)] ulong B0,
+                                            [ValueSource("_8H4S2D_")] [Random(1)] ulong B1,
+                                            [Values(0b00u, 0b01u, 0b10u)] uint size) // <8H8B, 4S4H, 2D2S>
+        {
+            uint Opcode = 0x2E224020; // RADDHN V0.8B, V1.8H, V2.8H
+            Opcode |= ((size & 3) << 22);
+            Bits Op = new Bits(Opcode);
+
+            AVec V0 = new AVec { X1 = TestContext.CurrentContext.Random.NextULong() };
+            AVec V1 = new AVec { X0 = A0, X1 = A1 };
+            AVec V2 = new AVec { X0 = B0, X1 = B1 };
+            AThreadState ThreadState = SingleOpcode(Opcode, V0: V0, V1: V1, V2: V2);
+
+            AArch64.Vpart(1, 0, new Bits(A0));
+            AArch64.Vpart(1, 1, new Bits(A1));
+            AArch64.Vpart(2, 0, new Bits(B0));
+            AArch64.Vpart(2, 1, new Bits(B1));
+            SimdFp.Raddhn_V(Op[30], Op[23, 22], Op[20, 16], Op[9, 5], Op[4, 0]);
+
+            Assert.Multiple(() =>
+            {
+                Assert.That(ThreadState.V0.X0, Is.EqualTo(AArch64.V(64, 0).ToUInt64()));
+                Assert.That(ThreadState.V0.X1, Is.Zero);
+            });
+        }
+
+        [Test, Pairwise, Description("RADDHN{2} <Vd>.<Tb>, <Vn>.<Ta>, <Vm>.<Ta>")]
+        public void Raddhn_V_8H16B_4S8H_2D4S([ValueSource("_8H4S2D_")] [Random(1)] ulong A0,
+                                             [ValueSource("_8H4S2D_")] [Random(1)] ulong A1,
+                                             [ValueSource("_8H4S2D_")] [Random(1)] ulong B0,
+                                             [ValueSource("_8H4S2D_")] [Random(1)] ulong B1,
+                                             [Values(0b00u, 0b01u, 0b10u)] uint size) // <8H16B, 4S8H, 2D4S>
+        {
+            uint Opcode = 0x6E224020; // RADDHN2 V0.16B, V1.8H, V2.8H
+            Opcode |= ((size & 3) << 22);
+            Bits Op = new Bits(Opcode);
+
+            ulong _X0 = TestContext.CurrentContext.Random.NextULong();
+            AVec V0 = new AVec { X0 = _X0 };
+            AVec V1 = new AVec { X0 = A0, X1 = A1 };
+            AVec V2 = new AVec { X0 = B0, X1 = B1 };
+            AThreadState ThreadState = SingleOpcode(Opcode, V0: V0, V1: V1, V2: V2);
+
+            AArch64.Vpart(1, 0, new Bits(A0));
+            AArch64.Vpart(1, 1, new Bits(A1));
+            AArch64.Vpart(2, 0, new Bits(B0));
+            AArch64.Vpart(2, 1, new Bits(B1));
+            SimdFp.Raddhn_V(Op[30], Op[23, 22], Op[20, 16], Op[9, 5], Op[4, 0]);
+
+            Assert.Multiple(() =>
+            {
+                Assert.That(ThreadState.V0.X0, Is.EqualTo(_X0));
+                Assert.That(ThreadState.V0.X1, Is.EqualTo(AArch64.Vpart(64, 0, 1).ToUInt64()));
+            });
+        }
+
+        [Test, Pairwise, Description("RSUBHN{2} <Vd>.<Tb>, <Vn>.<Ta>, <Vm>.<Ta>")]
+        public void Rsubhn_V_8H8B_4S4H_2D2S([ValueSource("_8H4S2D_")] [Random(1)] ulong A0,
+                                            [ValueSource("_8H4S2D_")] [Random(1)] ulong A1,
+                                            [ValueSource("_8H4S2D_")] [Random(1)] ulong B0,
+                                            [ValueSource("_8H4S2D_")] [Random(1)] ulong B1,
+                                            [Values(0b00u, 0b01u, 0b10u)] uint size) // <8H8B, 4S4H, 2D2S>
+        {
+            uint Opcode = 0x2E226020; // RSUBHN V0.8B, V1.8H, V2.8H
+            Opcode |= ((size & 3) << 22);
+            Bits Op = new Bits(Opcode);
+
+            AVec V0 = new AVec { X1 = TestContext.CurrentContext.Random.NextULong() };
+            AVec V1 = new AVec { X0 = A0, X1 = A1 };
+            AVec V2 = new AVec { X0 = B0, X1 = B1 };
+            AThreadState ThreadState = SingleOpcode(Opcode, V0: V0, V1: V1, V2: V2);
+
+            AArch64.Vpart(1, 0, new Bits(A0));
+            AArch64.Vpart(1, 1, new Bits(A1));
+            AArch64.Vpart(2, 0, new Bits(B0));
+            AArch64.Vpart(2, 1, new Bits(B1));
+            SimdFp.Rsubhn_V(Op[30], Op[23, 22], Op[20, 16], Op[9, 5], Op[4, 0]);
+
+            Assert.Multiple(() =>
+            {
+                Assert.That(ThreadState.V0.X0, Is.EqualTo(AArch64.V(64, 0).ToUInt64()));
+                Assert.That(ThreadState.V0.X1, Is.Zero);
+            });
+        }
+
+        [Test, Pairwise, Description("RSUBHN{2} <Vd>.<Tb>, <Vn>.<Ta>, <Vm>.<Ta>")]
+        public void Rsubhn_V_8H16B_4S8H_2D4S([ValueSource("_8H4S2D_")] [Random(1)] ulong A0,
+                                             [ValueSource("_8H4S2D_")] [Random(1)] ulong A1,
+                                             [ValueSource("_8H4S2D_")] [Random(1)] ulong B0,
+                                             [ValueSource("_8H4S2D_")] [Random(1)] ulong B1,
+                                             [Values(0b00u, 0b01u, 0b10u)] uint size) // <8H16B, 4S8H, 2D4S>
+        {
+            uint Opcode = 0x6E226020; // RSUBHN2 V0.16B, V1.8H, V2.8H
+            Opcode |= ((size & 3) << 22);
+            Bits Op = new Bits(Opcode);
+
+            ulong _X0 = TestContext.CurrentContext.Random.NextULong();
+            AVec V0 = new AVec { X0 = _X0 };
+            AVec V1 = new AVec { X0 = A0, X1 = A1 };
+            AVec V2 = new AVec { X0 = B0, X1 = B1 };
+            AThreadState ThreadState = SingleOpcode(Opcode, V0: V0, V1: V1, V2: V2);
+
+            AArch64.Vpart(1, 0, new Bits(A0));
+            AArch64.Vpart(1, 1, new Bits(A1));
+            AArch64.Vpart(2, 0, new Bits(B0));
+            AArch64.Vpart(2, 1, new Bits(B1));
+            SimdFp.Rsubhn_V(Op[30], Op[23, 22], Op[20, 16], Op[9, 5], Op[4, 0]);
+
+            Assert.Multiple(() =>
+            {
+                Assert.That(ThreadState.V0.X0, Is.EqualTo(_X0));
+                Assert.That(ThreadState.V0.X1, Is.EqualTo(AArch64.Vpart(64, 0, 1).ToUInt64()));
+            });
+        }
+
+        [Test, Description("SUB <V><d>, <V><n>, <V><m>")]
+        public void Sub_S_D([ValueSource("_D_")] [Random(1)] ulong A,
+                            [ValueSource("_D_")] [Random(1)] ulong B)
+        {
+            uint Opcode = 0x7EE28420; // SUB D0, D1, D2
+            Bits Op = new Bits(Opcode);
+
+            AVec V0 = new AVec { X1 = TestContext.CurrentContext.Random.NextULong() };
+            AVec V1 = new AVec { X0 = A };
+            AVec V2 = new AVec { X0 = B };
+            AThreadState ThreadState = SingleOpcode(Opcode, V0: V0, V1: V1, V2: V2);
+
+            AArch64.V(1, new Bits(A));
+            AArch64.V(2, new Bits(B));
+            SimdFp.Sub_S(Op[23, 22], Op[20, 16], Op[9, 5], Op[4, 0]);
+
+            Assert.That(ThreadState.V0.X0, Is.EqualTo(AArch64.V(64, 0).ToUInt64()));
+            Assert.That(ThreadState.V0.X1, Is.Zero);
+        }
+
+        [Test, Description("SUB <Vd>.<T>, <Vn>.<T>, <Vm>.<T>")]
+        public void Sub_V_8B_4H_2S([ValueSource("_8B4H2S_")] [Random(1)] ulong A,
+                                   [ValueSource("_8B4H2S_")] [Random(1)] ulong B,
+                                   [Values(0b00u, 0b01u, 0b10u)] uint size) // <8B, 4H, 2S>
+        {
+            uint Opcode = 0x2E228420; // SUB V0.8B, V1.8B, V2.8B
+            Opcode |= ((size & 3) << 22);
+            Bits Op = new Bits(Opcode);
+
+            AVec V0 = new AVec { X1 = TestContext.CurrentContext.Random.NextULong() };
+            AVec V1 = new AVec { X0 = A };
+            AVec V2 = new AVec { X0 = B };
+            AThreadState ThreadState = SingleOpcode(Opcode, V0: V0, V1: V1, V2: V2);
+
+            AArch64.V(1, new Bits(A));
+            AArch64.V(2, new Bits(B));
+            SimdFp.Sub_V(Op[30], Op[23, 22], Op[20, 16], Op[9, 5], Op[4, 0]);
+
+            Assert.That(ThreadState.V0.X0, Is.EqualTo(AArch64.V(64, 0).ToUInt64()));
+            Assert.That(ThreadState.V0.X1, Is.Zero);
+        }
+
+        [Test, Pairwise, Description("SUB <Vd>.<T>, <Vn>.<T>, <Vm>.<T>")]
+        public void Sub_V_16B_8H_4S_2D([ValueSource("_16B8H4S2D_")] [Random(1)] ulong A0,
+                                       [ValueSource("_16B8H4S2D_")] [Random(1)] ulong A1,
+                                       [ValueSource("_16B8H4S2D_")] [Random(1)] ulong B0,
+                                       [ValueSource("_16B8H4S2D_")] [Random(1)] ulong B1,
+                                       [Values(0b00u, 0b01u, 0b10u, 0b11u)] uint size) // <16B, 8H, 4S, 2D>
+        {
+            uint Opcode = 0x6E228420; // SUB V0.16B, V1.16B, V2.16B
+            Opcode |= ((size & 3) << 22);
+            Bits Op = new Bits(Opcode);
+
+            AVec V1 = new AVec { X0 = A0, X1 = A1 };
+            AVec V2 = new AVec { X0 = B0, X1 = B1 };
+            AThreadState ThreadState = SingleOpcode(Opcode, V1: V1, V2: V2);
+
+            AArch64.Vpart(1, 0, new Bits(A0));
+            AArch64.Vpart(1, 1, new Bits(A1));
+            AArch64.Vpart(2, 0, new Bits(B0));
+            AArch64.Vpart(2, 1, new Bits(B1));
+            SimdFp.Sub_V(Op[30], Op[23, 22], Op[20, 16], Op[9, 5], Op[4, 0]);
+
+            Assert.Multiple(() =>
+            {
+                Assert.That(ThreadState.V0.X0, Is.EqualTo(AArch64.Vpart(64, 0, 0).ToUInt64()));
+                Assert.That(ThreadState.V0.X1, Is.EqualTo(AArch64.Vpart(64, 0, 1).ToUInt64()));
+            });
+        }
+
+        [Test, Pairwise, Description("SUBHN{2} <Vd>.<Tb>, <Vn>.<Ta>, <Vm>.<Ta>")]
+        public void Subhn_V_8H8B_4S4H_2D2S([ValueSource("_8H4S2D_")] [Random(1)] ulong A0,
+                                           [ValueSource("_8H4S2D_")] [Random(1)] ulong A1,
+                                           [ValueSource("_8H4S2D_")] [Random(1)] ulong B0,
+                                           [ValueSource("_8H4S2D_")] [Random(1)] ulong B1,
+                                           [Values(0b00u, 0b01u, 0b10u)] uint size) // <8H8B, 4S4H, 2D2S>
+        {
+            uint Opcode = 0x0E226020; // SUBHN V0.8B, V1.8H, V2.8H
+            Opcode |= ((size & 3) << 22);
+            Bits Op = new Bits(Opcode);
+
+            AVec V0 = new AVec { X1 = TestContext.CurrentContext.Random.NextULong() };
+            AVec V1 = new AVec { X0 = A0, X1 = A1 };
+            AVec V2 = new AVec { X0 = B0, X1 = B1 };
+            AThreadState ThreadState = SingleOpcode(Opcode, V0: V0, V1: V1, V2: V2);
+
+            AArch64.Vpart(1, 0, new Bits(A0));
+            AArch64.Vpart(1, 1, new Bits(A1));
+            AArch64.Vpart(2, 0, new Bits(B0));
+            AArch64.Vpart(2, 1, new Bits(B1));
+            SimdFp.Subhn_V(Op[30], Op[23, 22], Op[20, 16], Op[9, 5], Op[4, 0]);
+
+            Assert.Multiple(() =>
+            {
+                Assert.That(ThreadState.V0.X0, Is.EqualTo(AArch64.V(64, 0).ToUInt64()));
+                Assert.That(ThreadState.V0.X1, Is.Zero);
+            });
+        }
+
+        [Test, Pairwise, Description("SUBHN{2} <Vd>.<Tb>, <Vn>.<Ta>, <Vm>.<Ta>")]
+        public void Subhn_V_8H16B_4S8H_2D4S([ValueSource("_8H4S2D_")] [Random(1)] ulong A0,
+                                            [ValueSource("_8H4S2D_")] [Random(1)] ulong A1,
+                                            [ValueSource("_8H4S2D_")] [Random(1)] ulong B0,
+                                            [ValueSource("_8H4S2D_")] [Random(1)] ulong B1,
+                                            [Values(0b00u, 0b01u, 0b10u)] uint size) // <8H16B, 4S8H, 2D4S>
+        {
+            uint Opcode = 0x4E226020; // SUBHN2 V0.16B, V1.8H, V2.8H
+            Opcode |= ((size & 3) << 22);
+            Bits Op = new Bits(Opcode);
+
+            ulong _X0 = TestContext.CurrentContext.Random.NextULong();
+            AVec V0 = new AVec { X0 = _X0 };
+            AVec V1 = new AVec { X0 = A0, X1 = A1 };
+            AVec V2 = new AVec { X0 = B0, X1 = B1 };
+            AThreadState ThreadState = SingleOpcode(Opcode, V0: V0, V1: V1, V2: V2);
+
+            AArch64.Vpart(1, 0, new Bits(A0));
+            AArch64.Vpart(1, 1, new Bits(A1));
+            AArch64.Vpart(2, 0, new Bits(B0));
+            AArch64.Vpart(2, 1, new Bits(B1));
+            SimdFp.Subhn_V(Op[30], Op[23, 22], Op[20, 16], Op[9, 5], Op[4, 0]);
+
+            Assert.Multiple(() =>
+            {
+                Assert.That(ThreadState.V0.X0, Is.EqualTo(_X0));
+                Assert.That(ThreadState.V0.X1, Is.EqualTo(AArch64.Vpart(64, 0, 1).ToUInt64()));
+            });
+        }
+#endif
+    }
+}
diff --git a/Ryujinx.Tests/Cpu/Tester/Instructions.cs b/Ryujinx.Tests/Cpu/Tester/Instructions.cs
index 7a51923f..2ca76ffd 100644
--- a/Ryujinx.Tests/Cpu/Tester/Instructions.cs
+++ b/Ryujinx.Tests/Cpu/Tester/Instructions.cs
@@ -1,7 +1,7 @@
 // https://github.com/LDj3SNuD/ARM_v8-A_AArch64_Instructions_Tester/blob/master/Tester/Instructions.cs
 
 // https://meriac.github.io/archex/A64_v83A_ISA/index.xml
-/* https://meriac.github.io/archex/A64_v83A_ISA/fpsimdindex.xml */
+// https://meriac.github.io/archex/A64_v83A_ISA/fpsimdindex.xml
 
 using System.Numerics;
 
@@ -1674,9 +1674,578 @@ namespace Ryujinx.Tests.Cpu.Tester
 #endregion
     }
 
-    /*
-    internal static class Advanced
+    internal static class SimdFp
     {
+#region "Simd"
+        // https://meriac.github.io/archex/A64_v83A_ISA/abs_advsimd.xml#ABS_asisdmisc_R
+        public static void Abs_S(Bits size, Bits Rn, Bits Rd)
+        {
+            bool U = false;
+
+            /* Decode Scalar */
+            int d = (int)UInt(Rd);
+            int n = (int)UInt(Rn);
+
+            /* if size != '11' then ReservedValue(); */
+
+            int esize = 8 << (int)UInt(size);
+            int datasize = esize;
+            int elements = 1;
+
+            bool neg = (U == true);
+
+            /* Operation */
+            /* CheckFPAdvSIMDEnabled64(); */
+
+            Bits result = new Bits(datasize);
+            Bits operand = V(datasize, n);
+            BigInteger element;
+
+            for (int e = 0; e <= elements - 1; e++)
+            {
+                element = SInt(Elem(operand, e, esize));
+
+                if (neg)
+                {
+                    element = -element;
+                }
+                else
+                {
+                    element = Abs(element);
+                }
+
+                Elem(result, e, esize, element.SubBigInteger(esize - 1, 0));
+            }
+
+            V(d, result);
+        }
+
+        // https://meriac.github.io/archex/A64_v83A_ISA/abs_advsimd.xml#ABS_asimdmisc_R
+        public static void Abs_V(bool Q, Bits size, Bits Rn, Bits Rd)
+        {
+            bool U = false;
+
+            /* Decode Vector */
+            int d = (int)UInt(Rd);
+            int n = (int)UInt(Rn);
+
+            /* if size:Q == '110' then ReservedValue(); */
+
+            int esize = 8 << (int)UInt(size);
+            int datasize = (Q ? 128 : 64);
+            int elements = datasize / esize;
+
+            bool neg = (U == true);
+
+            /* Operation */
+            /* CheckFPAdvSIMDEnabled64(); */
+
+            Bits result = new Bits(datasize);
+            Bits operand = V(datasize, n);
+            BigInteger element;
+
+            for (int e = 0; e <= elements - 1; e++)
+            {
+                element = SInt(Elem(operand, e, esize));
+
+                if (neg)
+                {
+                    element = -element;
+                }
+                else
+                {
+                    element = Abs(element);
+                }
+
+                Elem(result, e, esize, element.SubBigInteger(esize - 1, 0));
+            }
+
+            V(d, result);
+        }
+
+        // https://meriac.github.io/archex/A64_v83A_ISA/neg_advsimd.xml#NEG_asisdmisc_R
+        public static void Neg_S(Bits size, Bits Rn, Bits Rd)
+        {
+            bool U = true;
+
+            /* Decode Scalar */
+            int d = (int)UInt(Rd);
+            int n = (int)UInt(Rn);
+
+            /* if size != '11' then ReservedValue(); */
+
+            int esize = 8 << (int)UInt(size);
+            int datasize = esize;
+            int elements = 1;
+
+            bool neg = (U == true);
+
+            /* Operation */
+            /* CheckFPAdvSIMDEnabled64(); */
+
+            Bits result = new Bits(datasize);
+            Bits operand = V(datasize, n);
+            BigInteger element;
+
+            for (int e = 0; e <= elements - 1; e++)
+            {
+                element = SInt(Elem(operand, e, esize));
+
+                if (neg)
+                {
+                    element = -element;
+                }
+                else
+                {
+                    element = Abs(element);
+                }
+
+                Elem(result, e, esize, element.SubBigInteger(esize - 1, 0));
+            }
+
+            V(d, result);
+        }
+
+        // https://meriac.github.io/archex/A64_v83A_ISA/neg_advsimd.xml#NEG_asimdmisc_R
+        public static void Neg_V(bool Q, Bits size, Bits Rn, Bits Rd)
+        {
+            bool U = true;
+
+            /* Decode Vector */
+            int d = (int)UInt(Rd);
+            int n = (int)UInt(Rn);
+
+            /* if size:Q == '110' then ReservedValue(); */
+
+            int esize = 8 << (int)UInt(size);
+            int datasize = (Q ? 128 : 64);
+            int elements = datasize / esize;
+
+            bool neg = (U == true);
+
+            /* Operation */
+            /* CheckFPAdvSIMDEnabled64(); */
+
+            Bits result = new Bits(datasize);
+            Bits operand = V(datasize, n);
+            BigInteger element;
+
+            for (int e = 0; e <= elements - 1; e++)
+            {
+                element = SInt(Elem(operand, e, esize));
+
+                if (neg)
+                {
+                    element = -element;
+                }
+                else
+                {
+                    element = Abs(element);
+                }
+
+                Elem(result, e, esize, element.SubBigInteger(esize - 1, 0));
+            }
+
+            V(d, result);
+        }
+#endregion
+
+#region "SimdReg"
+        // https://meriac.github.io/archex/A64_v83A_ISA/add_advsimd.xml#ADD_asisdsame_only
+        public static void Add_S(Bits size, Bits Rm, Bits Rn, Bits Rd)
+        {
+            bool U = false;
+
+            /* Decode Scalar */
+            int d = (int)UInt(Rd);
+            int n = (int)UInt(Rn);
+            int m = (int)UInt(Rm);
+
+            /* if size != '11' then ReservedValue(); */
+
+            int esize = 8 << (int)UInt(size);
+            int datasize = esize;
+            int elements = 1;
+
+            bool sub_op = (U == true);
+
+            /* Operation */
+            /* CheckFPAdvSIMDEnabled64(); */
+
+            Bits result = new Bits(datasize);
+            Bits operand1 = V(datasize, n);
+            Bits operand2 = V(datasize, m);
+            Bits element1;
+            Bits element2;
+
+            for (int e = 0; e <= elements - 1; e++)
+            {
+                element1 = Elem(operand1, e, esize);
+                element2 = Elem(operand2, e, esize);
+
+                if (sub_op)
+                {
+                    Elem(result, e, esize, element1 - element2);
+                }
+                else
+                {
+                    Elem(result, e, esize, element1 + element2);
+                }
+            }
+
+            V(d, result);
+        }
+
+        // https://meriac.github.io/archex/A64_v83A_ISA/add_advsimd.xml#ADD_asimdsame_only
+        public static void Add_V(bool Q, Bits size, Bits Rm, Bits Rn, Bits Rd)
+        {
+            bool U = false;
+
+            /* Decode Vector */
+            int d = (int)UInt(Rd);
+            int n = (int)UInt(Rn);
+            int m = (int)UInt(Rm);
+
+            /* if size:Q == '110' then ReservedValue(); */
+
+            int esize = 8 << (int)UInt(size);
+            int datasize = (Q ? 128 : 64);
+            int elements = datasize / esize;
+
+            bool sub_op = (U == true);
+
+            /* Operation */
+            /* CheckFPAdvSIMDEnabled64(); */
+
+            Bits result = new Bits(datasize);
+            Bits operand1 = V(datasize, n);
+            Bits operand2 = V(datasize, m);
+            Bits element1;
+            Bits element2;
+
+            for (int e = 0; e <= elements - 1; e++)
+            {
+                element1 = Elem(operand1, e, esize);
+                element2 = Elem(operand2, e, esize);
+
+                if (sub_op)
+                {
+                    Elem(result, e, esize, element1 - element2);
+                }
+                else
+                {
+                    Elem(result, e, esize, element1 + element2);
+                }
+            }
+
+            V(d, result);
+        }
+
+        // https://meriac.github.io/archex/A64_v83A_ISA/addhn_advsimd.xml
+        public static void Addhn_V(bool Q, Bits size, Bits Rm, Bits Rn, Bits Rd)
+        {
+            bool U = false;
+            bool o1 = false;
+
+            /* Decode */
+            int d = (int)UInt(Rd);
+            int n = (int)UInt(Rn);
+            int m = (int)UInt(Rm);
+
+            /* if size == '11' then ReservedValue(); */
+
+            int esize = 8 << (int)UInt(size);
+            int datasize = 64;
+            int part = (int)UInt(Q);
+            int elements = datasize / esize;
+
+            bool sub_op = (o1 == true);
+            bool round = (U == true);
+
+            /* Operation */
+            /* CheckFPAdvSIMDEnabled64(); */
+
+            Bits result = new Bits(datasize);
+            Bits operand1 = V(2 * datasize, n);
+            Bits operand2 = V(2 * datasize, m);
+            BigInteger round_const = (round ? (BigInteger)1 << (esize - 1) : 0);
+            Bits sum;
+            Bits element1;
+            Bits element2;
+
+            for (int e = 0; e <= elements - 1; e++)
+            {
+                element1 = Elem(operand1, e, 2 * esize);
+                element2 = Elem(operand2, e, 2 * esize);
+
+                if (sub_op)
+                {
+                    sum = element1 - element2;
+                }
+                else
+                {
+                    sum = element1 + element2;
+                }
+
+                sum = sum + round_const;
+
+                Elem(result, e, esize, sum[2 * esize - 1, esize]);
+            }
+
+            Vpart(d, part, result);
+        }
+
+        // https://meriac.github.io/archex/A64_v83A_ISA/raddhn_advsimd.xml
+        public static void Raddhn_V(bool Q, Bits size, Bits Rm, Bits Rn, Bits Rd)
+        {
+            bool U = true;
+            bool o1 = false;
+
+            /* Decode */
+            int d = (int)UInt(Rd);
+            int n = (int)UInt(Rn);
+            int m = (int)UInt(Rm);
+
+            /* if size == '11' then ReservedValue(); */
+
+            int esize = 8 << (int)UInt(size);
+            int datasize = 64;
+            int part = (int)UInt(Q);
+            int elements = datasize / esize;
+
+            bool sub_op = (o1 == true);
+            bool round = (U == true);
+
+            /* Operation */
+            /* CheckFPAdvSIMDEnabled64(); */
+
+            Bits result = new Bits(datasize);
+            Bits operand1 = V(2 * datasize, n);
+            Bits operand2 = V(2 * datasize, m);
+            BigInteger round_const = (round ? (BigInteger)1 << (esize - 1) : 0);
+            Bits sum;
+            Bits element1;
+            Bits element2;
+
+            for (int e = 0; e <= elements - 1; e++)
+            {
+                element1 = Elem(operand1, e, 2 * esize);
+                element2 = Elem(operand2, e, 2 * esize);
+
+                if (sub_op)
+                {
+                    sum = element1 - element2;
+                }
+                else
+                {
+                    sum = element1 + element2;
+                }
+
+                sum = sum + round_const;
+
+                Elem(result, e, esize, sum[2 * esize - 1, esize]);
+            }
+
+            Vpart(d, part, result);
+        }
+
+        // https://meriac.github.io/archex/A64_v83A_ISA/rsubhn_advsimd.xml
+        public static void Rsubhn_V(bool Q, Bits size, Bits Rm, Bits Rn, Bits Rd)
+        {
+            bool U = true;
+            bool o1 = true;
+
+            /* Decode */
+            int d = (int)UInt(Rd);
+            int n = (int)UInt(Rn);
+            int m = (int)UInt(Rm);
+
+            /* if size == '11' then ReservedValue(); */
+
+            int esize = 8 << (int)UInt(size);
+            int datasize = 64;
+            int part = (int)UInt(Q);
+            int elements = datasize / esize;
+
+            bool sub_op = (o1 == true);
+            bool round = (U == true);
+
+            /* Operation */
+            /* CheckFPAdvSIMDEnabled64(); */
+
+            Bits result = new Bits(datasize);
+            Bits operand1 = V(2 * datasize, n);
+            Bits operand2 = V(2 * datasize, m);
+            BigInteger round_const = (round ? (BigInteger)1 << (esize - 1) : 0);
+            Bits sum;
+            Bits element1;
+            Bits element2;
+
+            for (int e = 0; e <= elements - 1; e++)
+            {
+                element1 = Elem(operand1, e, 2 * esize);
+                element2 = Elem(operand2, e, 2 * esize);
+
+                if (sub_op)
+                {
+                    sum = element1 - element2;
+                }
+                else
+                {
+                    sum = element1 + element2;
+                }
+
+                sum = sum + round_const;
+
+                Elem(result, e, esize, sum[2 * esize - 1, esize]);
+            }
+
+            Vpart(d, part, result);
+        }
+
+        // https://meriac.github.io/archex/A64_v83A_ISA/sub_advsimd.xml#SUB_asisdsame_only
+        public static void Sub_S(Bits size, Bits Rm, Bits Rn, Bits Rd)
+        {
+            bool U = true;
+
+            /* Decode Scalar */
+            int d = (int)UInt(Rd);
+            int n = (int)UInt(Rn);
+            int m = (int)UInt(Rm);
+
+            /* if size != '11' then ReservedValue(); */
+
+            int esize = 8 << (int)UInt(size);
+            int datasize = esize;
+            int elements = 1;
+
+            bool sub_op = (U == true);
+
+            /* Operation */
+            /* CheckFPAdvSIMDEnabled64(); */
+
+            Bits result = new Bits(datasize);
+            Bits operand1 = V(datasize, n);
+            Bits operand2 = V(datasize, m);
+            Bits element1;
+            Bits element2;
+
+            for (int e = 0; e <= elements - 1; e++)
+            {
+                element1 = Elem(operand1, e, esize);
+                element2 = Elem(operand2, e, esize);
+
+                if (sub_op)
+                {
+                    Elem(result, e, esize, element1 - element2);
+                }
+                else
+                {
+                    Elem(result, e, esize, element1 + element2);
+                }
+            }
+
+            V(d, result);
+        }
+
+        // https://meriac.github.io/archex/A64_v83A_ISA/sub_advsimd.xml#SUB_asimdsame_only
+        public static void Sub_V(bool Q, Bits size, Bits Rm, Bits Rn, Bits Rd)
+        {
+            bool U = true;
+
+            /* Decode Vector */
+            int d = (int)UInt(Rd);
+            int n = (int)UInt(Rn);
+            int m = (int)UInt(Rm);
+
+            /* if size:Q == '110' then ReservedValue(); */
+
+            int esize = 8 << (int)UInt(size);
+            int datasize = (Q ? 128 : 64);
+            int elements = datasize / esize;
+
+            bool sub_op = (U == true);
+
+            /* Operation */
+            /* CheckFPAdvSIMDEnabled64(); */
+
+            Bits result = new Bits(datasize);
+            Bits operand1 = V(datasize, n);
+            Bits operand2 = V(datasize, m);
+            Bits element1;
+            Bits element2;
+
+            for (int e = 0; e <= elements - 1; e++)
+            {
+                element1 = Elem(operand1, e, esize);
+                element2 = Elem(operand2, e, esize);
+
+                if (sub_op)
+                {
+                    Elem(result, e, esize, element1 - element2);
+                }
+                else
+                {
+                    Elem(result, e, esize, element1 + element2);
+                }
+            }
+
+            V(d, result);
+        }
+
+        // https://meriac.github.io/archex/A64_v83A_ISA/subhn_advsimd.xml
+        public static void Subhn_V(bool Q, Bits size, Bits Rm, Bits Rn, Bits Rd)
+        {
+            bool U = false;
+            bool o1 = true;
+
+            /* Decode */
+            int d = (int)UInt(Rd);
+            int n = (int)UInt(Rn);
+            int m = (int)UInt(Rm);
+
+            /* if size == '11' then ReservedValue(); */
+
+            int esize = 8 << (int)UInt(size);
+            int datasize = 64;
+            int part = (int)UInt(Q);
+            int elements = datasize / esize;
+
+            bool sub_op = (o1 == true);
+            bool round = (U == true);
+
+            /* Operation */
+            /* CheckFPAdvSIMDEnabled64(); */
+
+            Bits result = new Bits(datasize);
+            Bits operand1 = V(2 * datasize, n);
+            Bits operand2 = V(2 * datasize, m);
+            BigInteger round_const = (round ? (BigInteger)1 << (esize - 1) : 0);
+            Bits sum;
+            Bits element1;
+            Bits element2;
+
+            for (int e = 0; e <= elements - 1; e++)
+            {
+                element1 = Elem(operand1, e, 2 * esize);
+                element2 = Elem(operand2, e, 2 * esize);
+
+                if (sub_op)
+                {
+                    sum = element1 - element2;
+                }
+                else
+                {
+                    sum = element1 + element2;
+                }
+
+                sum = sum + round_const;
+
+                Elem(result, e, esize, sum[2 * esize - 1, esize]);
+            }
+
+            Vpart(d, part, result);
+        }
+#endregion
     }
-    */
 }
diff --git a/Ryujinx.Tests/Cpu/Tester/Pseudocode.cs b/Ryujinx.Tests/Cpu/Tester/Pseudocode.cs
index 1da17c49..21c3935c 100644
--- a/Ryujinx.Tests/Cpu/Tester/Pseudocode.cs
+++ b/Ryujinx.Tests/Cpu/Tester/Pseudocode.cs
@@ -70,6 +70,7 @@ namespace Ryujinx.Tests.Cpu.Tester
             // ELR_ELx and SPSR_ELx have UNKNOWN values, so that it
             // is impossible to return from a reset in an architecturally defined way.
             AArch64.ResetGeneralRegisters();
+            AArch64.ResetSIMDFPRegisters();
             AArch64.ResetSpecialRegisters();
         }
 #endregion
@@ -85,6 +86,16 @@ namespace Ryujinx.Tests.Cpu.Tester
             }
         }
 
+        /* #AArch64.ResetSIMDFPRegisters.0 */
+        public static void ResetSIMDFPRegisters()
+        {
+            for (int i = 0; i <= 31; i++)
+            {
+                /* V[i] = bits(128) UNKNOWN; */
+                _V[i].SetAll(false);
+            }
+        }
+
         /* #AArch64.ResetSpecialRegisters.0 */
         public static void ResetSpecialRegisters()
         {
@@ -116,8 +127,8 @@ namespace Ryujinx.Tests.Cpu.Tester
                     default:
                     case Bits bits when bits == EL1:
                         SP_EL1 = ZeroExtend(64, value);
-                        break;
-                    /*case Bits bits when bits == EL2:
+                        break;/*
+                    case Bits bits when bits == EL2:
                         SP_EL2 = ZeroExtend(64, value);
                         break;
                     case Bits bits when bits == EL3:
@@ -144,8 +155,8 @@ namespace Ryujinx.Tests.Cpu.Tester
                         return SP_EL0[width - 1, 0];
                     default:
                     case Bits bits when bits == EL1:
-                        return SP_EL1[width - 1, 0];
-                    /*case Bits bits when bits == EL2:
+                        return SP_EL1[width - 1, 0];/*
+                    case Bits bits when bits == EL2:
                         return SP_EL2[width - 1, 0];
                     case Bits bits when bits == EL3:
                         return SP_EL3[width - 1, 0];*/
@@ -153,6 +164,64 @@ namespace Ryujinx.Tests.Cpu.Tester
             }
         }
 
+        // #impl-aarch64.V.write.1
+        public static void V(int n, Bits value)
+        {
+            /* int width = value.Count; */
+
+            /* assert n >= 0 && n <= 31; */
+            /* assert width IN {8,16,32,64,128}; */
+
+            _V[n] = ZeroExtend(128, value);
+        }
+
+        /* #impl-aarch64.V.read.1 */
+        public static Bits V(int width, int n)
+        {
+            /* assert n >= 0 && n <= 31; */
+            /* assert width IN {8,16,32,64,128}; */
+
+            return _V[n][width - 1, 0];
+        }
+
+        /* #impl-aarch64.Vpart.read.2 */
+        public static Bits Vpart(int width, int n, int part)
+        {
+            /* assert n >= 0 && n <= 31; */
+            /* assert part IN {0, 1}; */
+
+            if (part == 0)
+            {
+                /* assert width IN {8,16,32,64}; */
+                return _V[n][width - 1, 0];
+            }
+            else
+            {
+                /* assert width == 64; */
+                return _V[n][(width * 2) - 1, width];
+            }
+        }
+
+        // #impl-aarch64.Vpart.write.2
+        public static void Vpart(int n, int part, Bits value)
+        {
+            int width = value.Count;
+
+            /* assert n >= 0 && n <= 31; */
+            /* assert part IN {0, 1}; */
+
+            if (part == 0)
+            {
+                /* assert width IN {8,16,32,64}; */
+                _V[n] = ZeroExtend(128, value);
+            }
+            else
+            {
+                /* assert width == 64; */
+                _V[n][(width * 2) - 1, width] = value[width - 1, 0];
+            }
+        }
+
         // #impl-aarch64.X.write.1
         public static void X(int n, Bits value)
         {
@@ -214,6 +283,7 @@ namespace Ryujinx.Tests.Cpu.Tester
         public static Bits ExtendReg(int N, int reg, ExtendType type, int shift)
         {
             /* assert shift >= 0 && shift <= 4; */
+
             Bits val = X(N, reg);
             bool unsigned;
             int len;
@@ -384,6 +454,12 @@ namespace Ryujinx.Tests.Cpu.Tester
                 _R[i] = new Bits(64, false);
             }
 
+            _V = new Bits[32];
+            for (int i = 0; i <= 31; i++)
+            {
+                _V[i] = new Bits(128, false);
+            }
+
             SP_EL0 = new Bits(64, false);
             SP_EL1 = new Bits(64, false);
 
@@ -437,6 +513,12 @@ namespace Ryujinx.Tests.Cpu.Tester
             return (result, carry_out);
         }
 
+        // #impl-shared.Abs.1
+        public static BigInteger Abs(BigInteger x)
+        {
+            return (x >= 0 ? x : -x);
+        }
+
         // #impl-shared.CountLeadingSignBits.1
         public static int CountLeadingSignBits(Bits x)
         {
@@ -453,6 +535,26 @@ namespace Ryujinx.Tests.Cpu.Tester
             return (N - 1 - HighestSetBit(x));
         }
 
+        // #impl-shared.Elem.read.3
+        public static Bits Elem(/*in */Bits vector, int e, int size)
+        {
+            /* int N = vector.Count; */
+
+            /* assert e >= 0 && (e+1)*size <= N; */
+
+            return vector[e * size + size - 1, e * size];
+        }
+
+        // #impl-shared.Elem.write.3
+        public static void Elem(/*out */Bits vector, int e, int size, Bits value)
+        {
+            /* int N = vector.Count; */
+
+            /* assert e >= 0 && (e+1)*size <= N; */
+
+            vector[(e + 1) * size - 1, e * size] = value;
+        }
+
         /* */
         public static Bits EOR(Bits x, Bits y)
         {
@@ -855,6 +957,8 @@ namespace Ryujinx.Tests.Cpu.Tester
 #region "functions/registers/"
         public static readonly Bits[] _R;
 
+        public static readonly Bits[] _V;
+
         public static Bits SP_EL0;
         public static Bits SP_EL1;
 #endregion
diff --git a/Ryujinx.Tests/Cpu/Tester/Types/Bits.cs b/Ryujinx.Tests/Cpu/Tester/Types/Bits.cs
index f4ee966c..30d63264 100644
--- a/Ryujinx.Tests/Cpu/Tester/Types/Bits.cs
+++ b/Ryujinx.Tests/Cpu/Tester/Types/Bits.cs
@@ -15,14 +15,15 @@ namespace Ryujinx.Tests.Cpu.Tester.Types
         public Bits(bool[] values) => bits = new BitArray(values);
         public Bits(byte[] bytes) => bits = new BitArray(bytes);
         public Bits(Bits bits) => this.bits = new BitArray(bits.bits);
-        private Bits(BitArray bitArray) => bits = new BitArray(bitArray);
         public Bits(int length) => bits = new BitArray(length);
         public Bits(int length, bool defaultValue) => bits = new BitArray(length, defaultValue);
+        private Bits(BitArray bitArray) => bits = new BitArray(bitArray);
         public Bits(ulong value) => bits = new BitArray(BitConverter.GetBytes(value));
         public Bits(uint value) => bits = new BitArray(BitConverter.GetBytes(value));
         public Bits(ushort value) => bits = new BitArray(BitConverter.GetBytes(value));
         public Bits(byte value) => bits = new BitArray(new byte[1] {value});
 
+        private BitArray ToBitArray() => new BitArray(bits);
         public ulong ToUInt64()
         {
             byte[] dst = new byte[8];
@@ -39,7 +40,22 @@ namespace Ryujinx.Tests.Cpu.Tester.Types
 
             return BitConverter.ToUInt32(dst, 0);
         }
-        private BitArray ToBitArray() => new BitArray(bits);
+        public ushort ToUInt16()
+        {
+            byte[] dst = new byte[2];
+
+            bits.CopyTo(dst, 0);
+
+            return BitConverter.ToUInt16(dst, 0);
+        }
+        public byte ToByte()
+        {
+            byte[] dst = new byte[1];
+
+            bits.CopyTo(dst, 0);
+
+            return dst[0];
+        }
 
         public bool this[int index] // ASL: "<>".
         {
@@ -166,17 +182,66 @@ namespace Ryujinx.Tests.Cpu.Tester.Types
 
             BigInteger dst;
 
-            if (left.Count <= 32)
+            switch (left.Count)
             {
-                dst = left.ToUInt32() + right;
+                case  8: dst = left.ToByte()   + right; break;
+                case 16: dst = left.ToUInt16() + right; break;
+                case 32: dst = left.ToUInt32() + right; break;
+                case 64: dst = left.ToUInt64() + right; break;
+
+                default: throw new ArgumentOutOfRangeException();
             }
-            else if (left.Count <= 64)
+
+            return dst.SubBigInteger(left.Count - 1, 0);
+        }
+        public static Bits operator +(Bits left, Bits right) // ASL: "+".
+        {
+            if (((object)left == null) || ((object)right == null))
             {
-                dst = left.ToUInt64() + right;
+                throw new ArgumentNullException();
             }
-            else
+
+            if (left.Count != right.Count)
             {
-                throw new ArgumentOutOfRangeException();
+                throw new ArgumentException();
+            }
+
+            BigInteger dst;
+
+            switch (left.Count)
+            {
+                case  8: dst = left.ToByte()   + (BigInteger)right.ToByte();   break;
+                case 16: dst = left.ToUInt16() + (BigInteger)right.ToUInt16(); break;
+                case 32: dst = left.ToUInt32() + (BigInteger)right.ToUInt32(); break;
+                case 64: dst = left.ToUInt64() + (BigInteger)right.ToUInt64(); break;
+
+                default: throw new ArgumentOutOfRangeException();
+            }
+
+            return dst.SubBigInteger(left.Count - 1, 0);
+        }
+        public static Bits operator -(Bits left, Bits right) // ASL: "-".
+        {
+            if (((object)left == null) || ((object)right == null))
+            {
+                throw new ArgumentNullException();
+            }
+
+            if (left.Count != right.Count)
+            {
+                throw new ArgumentException();
+            }
+
+            BigInteger dst;
+
+            switch (left.Count)
+            {
+                case  8: dst = left.ToByte()   - (BigInteger)right.ToByte();   break;
+                case 16: dst = left.ToUInt16() - (BigInteger)right.ToUInt16(); break;
+                case 32: dst = left.ToUInt32() - (BigInteger)right.ToUInt32(); break;
+                case 64: dst = left.ToUInt64() - (BigInteger)right.ToUInt64(); break;
+
+                default: throw new ArgumentOutOfRangeException();
             }
 
             return dst.SubBigInteger(left.Count - 1, 0);