Add Sqxtn_S, Sqxtn_V, Uqxtn_S, Uqxtn_V instructions and Tests (6). (#110)

* Update ILGeneratorEx.cs

* Update AOpCodeTable.cs

* Update AInstEmitSimdArithmetic.cs

* Update CpuTestSimd.cs

* Update CpuTestSimdReg.cs

* Update CpuTest.cs

* Update Pseudocode.cs

* Update Instructions.cs

* Update AInstEmitSimdArithmetic.cs

* Update AInstEmitSimdArithmetic.cs

* Update AInstEmitSimdArithmetic.cs

AOpCodeTable.cs

@@ -337,6 +337,8 @@ namespace ChocolArm64
             Set("0x001110<<1xxxxx011011xxxxxxxxxx", AInstEmit.Smin_V,        typeof(AOpCodeSimdReg));
             Set("0x001110<<1xxxxx100000xxxxxxxxxx", AInstEmit.Smlal_V,       typeof(AOpCodeSimdReg));
             Set("0x001110<<1xxxxx110000xxxxxxxxxx", AInstEmit.Smull_V,       typeof(AOpCodeSimdReg));
+            Set("01011110<<100001010010xxxxxxxxxx", AInstEmit.Sqxtn_S,       typeof(AOpCodeSimd));
+            Set("0x001110<<100001010010xxxxxxxxxx", AInstEmit.Sqxtn_V,       typeof(AOpCodeSimd));
             Set("0>001110<<1xxxxx010001xxxxxxxxxx", AInstEmit.Sshl_V,        typeof(AOpCodeSimdReg));
             Set("0x00111100>>>xxx101001xxxxxxxxxx", AInstEmit.Sshll_V,       typeof(AOpCodeSimdShImm));
             Set("010111110>>>>xxx000001xxxxxxxxxx", AInstEmit.Sshr_S,        typeof(AOpCodeSimdShImm));
@@ -370,6 +372,8 @@ namespace ChocolArm64
             Set("0x101110<<1xxxxx000001xxxxxxxxxx", AInstEmit.Uhadd_V,       typeof(AOpCodeSimdReg));
             Set("0x001110000xxxxx001111xxxxxxxxxx", AInstEmit.Umov_S,        typeof(AOpCodeSimdIns));
             Set("0x101110<<1xxxxx110000xxxxxxxxxx", AInstEmit.Umull_V,       typeof(AOpCodeSimdReg));
+            Set("01111110<<100001010010xxxxxxxxxx", AInstEmit.Uqxtn_S,       typeof(AOpCodeSimd));
+            Set("0x101110<<100001010010xxxxxxxxxx", AInstEmit.Uqxtn_V,       typeof(AOpCodeSimd));
             Set("0>101110<<1xxxxx010001xxxxxxxxxx", AInstEmit.Ushl_V,        typeof(AOpCodeSimdReg));
             Set("0x10111100>>>xxx101001xxxxxxxxxx", AInstEmit.Ushll_V,       typeof(AOpCodeSimdShImm));
             Set("011111110>>>>xxx000001xxxxxxxxxx", AInstEmit.Ushr_S,        typeof(AOpCodeSimdShImm));

Instruction/AInstEmitSimdArithmetic.cs

@@ -205,6 +205,84 @@ namespace ChocolArm64.Instruction
             }
         }
 
+        private static void EmitQxtn(AILEmitterCtx Context, bool Signed, bool Scalar)
+        {
+            AOpCodeSimd Op = (AOpCodeSimd)Context.CurrOp;
+
+            int Elems = (!Scalar ? 8 >> Op.Size : 1);
+            int ESize = 8 << Op.Size;
+
+            int TMaxValue = (Signed ? (1 << (ESize - 1)) - 1 : (int)((1L << ESize) - 1L));
+            int TMinValue = (Signed ? -((1 << (ESize - 1))) : 0);
+
+            int Part = (!Scalar & (Op.RegisterSize == ARegisterSize.SIMD128) ? Elems : 0);
+
+            Context.EmitLdc_I8(0L);
+            Context.EmitSttmp();
+
+            for (int Index = 0; Index < Elems; Index++)
+            {
+                AILLabel LblLe    = new AILLabel();
+                AILLabel LblGeEnd = new AILLabel();
+
+                EmitVectorExtract(Context, Op.Rn, Index, Op.Size + 1, Signed);
+
+                Context.Emit(OpCodes.Dup);
+
+                Context.EmitLdc_I4(TMaxValue);
+                Context.Emit(OpCodes.Conv_U8);
+
+                Context.Emit(Signed ? OpCodes.Ble_S : OpCodes.Ble_Un_S, LblLe);
+
+                Context.Emit(OpCodes.Pop);
+
+                Context.EmitLdc_I4(TMaxValue);
+
+                Context.EmitLdc_I8(0x8000000L);
+                Context.EmitSttmp();
+
+                Context.Emit(OpCodes.Br_S, LblGeEnd);
+
+                Context.MarkLabel(LblLe);
+
+                Context.Emit(OpCodes.Dup);
+
+                Context.EmitLdc_I4(TMinValue);
+                Context.Emit(OpCodes.Conv_I8);
+
+                Context.Emit(Signed ? OpCodes.Bge_S : OpCodes.Bge_Un_S, LblGeEnd);
+
+                Context.Emit(OpCodes.Pop);
+
+                Context.EmitLdc_I4(TMinValue);
+
+                Context.EmitLdc_I8(0x8000000L);
+                Context.EmitSttmp();
+
+                Context.MarkLabel(LblGeEnd);
+
+                if (Scalar)
+                {
+                    EmitVectorZeroLower(Context, Op.Rd);
+                }
+
+                EmitVectorInsert(Context, Op.Rd, Part + Index, Op.Size);
+            }
+
+            if (Part == 0)
+            {
+                EmitVectorZeroUpper(Context, Op.Rd);
+            }
+
+            Context.EmitLdarg(ATranslatedSub.StateArgIdx);
+            Context.EmitLdarg(ATranslatedSub.StateArgIdx);
+            Context.EmitCallPropGet(typeof(AThreadState), nameof(AThreadState.Fpsr));
+            Context.EmitLdtmp();
+            Context.Emit(OpCodes.Conv_I4);
+            Context.Emit(OpCodes.Or);
+            Context.EmitCallPropSet(typeof(AThreadState), nameof(AThreadState.Fpsr));
+        }
+
         public static void Fabd_S(AILEmitterCtx Context)
         {
             EmitScalarBinaryOpF(Context, () =>
@@ -971,6 +1049,16 @@ namespace ChocolArm64.Instruction
             EmitVectorWidenRnRmBinaryOpSx(Context, () => Context.Emit(OpCodes.Mul));
         }
 
+        public static void Sqxtn_S(AILEmitterCtx Context)
+        {
+            EmitQxtn(Context, Signed: true, Scalar: true);
+        }
+
+        public static void Sqxtn_V(AILEmitterCtx Context)
+        {
+            EmitQxtn(Context, Signed: true, Scalar: false);
+        }
+
         public static void Sub_S(AILEmitterCtx Context)
         {
             EmitScalarBinaryOpZx(Context, () => Context.Emit(OpCodes.Sub));
@@ -1049,5 +1137,15 @@ namespace ChocolArm64.Instruction
         {
             EmitVectorWidenRnRmBinaryOpZx(Context, () => Context.Emit(OpCodes.Mul));
         }
+
+        public static void Uqxtn_S(AILEmitterCtx Context)
+        {
+            EmitQxtn(Context, Signed: false, Scalar: true);
+        }
+
+        public static void Uqxtn_V(AILEmitterCtx Context)
+        {
+            EmitQxtn(Context, Signed: false, Scalar: false);
+        }
     }
 }

Translation/ILGeneratorEx.cs

@@ -6,7 +6,7 @@ namespace ChocolArm64
 
     static class ILGeneratorEx
     {
-        public static void EmitLdc_I4(this ILGenerator Generator,int Value)
+        public static void EmitLdc_I4(this ILGenerator Generator, int Value)
         {
             switch (Value)
             {
@@ -126,4 +126,4 @@ namespace ChocolArm64
             }         
         }
     }
-}
+}