Implemented fast paths for: (#846)

* opt

* Nit.

* opt_p2

* Nit.

ARMeilleure/CodeGen/X86/Assembler.cs

@@ -103,6 +103,7 @@ namespace ARMeilleure.CodeGen.X86
             Add(X86Instruction.Cvtsi2sd,   new InstructionInfo(BadOp,      BadOp,      BadOp,      BadOp,      0x00000f2a, InstructionFlags.Vex | InstructionFlags.PrefixF2));
             Add(X86Instruction.Cvtsi2ss,   new InstructionInfo(BadOp,      BadOp,      BadOp,      BadOp,      0x00000f2a, InstructionFlags.Vex | InstructionFlags.PrefixF3));
             Add(X86Instruction.Cvtss2sd,   new InstructionInfo(BadOp,      BadOp,      BadOp,      BadOp,      0x00000f5a, InstructionFlags.Vex | InstructionFlags.PrefixF3));
+            Add(X86Instruction.Cvtss2si,   new InstructionInfo(BadOp,      BadOp,      BadOp,      BadOp,      0x00000f2d, InstructionFlags.Vex | InstructionFlags.PrefixF3));
             Add(X86Instruction.Div,        new InstructionInfo(BadOp,      BadOp,      BadOp,      BadOp,      0x060000f7, InstructionFlags.None));
             Add(X86Instruction.Divpd,      new InstructionInfo(BadOp,      BadOp,      BadOp,      BadOp,      0x00000f5e, InstructionFlags.Vex | InstructionFlags.Prefix66));
             Add(X86Instruction.Divps,      new InstructionInfo(BadOp,      BadOp,      BadOp,      BadOp,      0x00000f5e, InstructionFlags.Vex));
@@ -791,6 +792,16 @@ namespace ARMeilleure.CodeGen.X86
             }
         }
 
+        public void WriteInstruction(
+            X86Instruction inst,
+            Operand dest,
+            Operand src1,
+            Operand src2,
+            OperandType type)
+        {
+            WriteInstruction(dest, src1, src2, inst, type);
+        }
+
         public void WriteInstruction(X86Instruction inst, Operand dest, Operand source, byte imm)
         {
             WriteInstruction(dest, null, source, inst);

ARMeilleure/CodeGen/X86/CodeGenerator.cs

@@ -269,11 +269,11 @@ namespace ARMeilleure.CodeGen.X86
                         {
                             if (dest.Type == OperandType.I32)
                             {
-                                context.Assembler.Movd(dest, source); // int _mm_cvtsi128_si32
+                                context.Assembler.Movd(dest, source); // int _mm_cvtsi128_si32(__m128i a)
                             }
                             else /* if (dest.Type == OperandType.I64) */
                             {
-                                context.Assembler.Movq(dest, source); // __int64 _mm_cvtsi128_si64
+                                context.Assembler.Movq(dest, source); // __int64 _mm_cvtsi128_si64(__m128i a)
                             }
                         }
                         else
@@ -305,6 +305,26 @@ namespace ARMeilleure.CodeGen.X86
                         break;
                     }
 
+                    case IntrinsicType.BinaryGpr:
+                    {
+                        Operand dest = operation.Destination;
+                        Operand src1 = operation.GetSource(0);
+                        Operand src2 = operation.GetSource(1);
+
+                        EnsureSameType(dest, src1);
+
+                        if (!HardwareCapabilities.SupportsVexEncoding)
+                        {
+                            EnsureSameReg(dest, src1);
+                        }
+
+                        Debug.Assert(!dest.Type.IsInteger() && src2.Type.IsInteger());
+
+                        context.Assembler.WriteInstruction(info.Inst, dest, src1, src2, src2.Type);
+
+                        break;
+                    }
+
                     case IntrinsicType.BinaryImm:
                     {
                         Operand dest = operation.Destination;
@@ -1070,11 +1090,11 @@ namespace ARMeilleure.CodeGen.X86
 
             if (source.Type == OperandType.I32)
             {
-                context.Assembler.Movd(dest, source);
+                context.Assembler.Movd(dest, source); // (__m128i _mm_cvtsi32_si128(int a))
             }
             else /* if (source.Type == OperandType.I64) */
             {
-                context.Assembler.Movq(dest, source);
+                context.Assembler.Movq(dest, source); // (__m128i _mm_cvtsi64_si128(__int64 a))
             }
         }
 

ARMeilleure/CodeGen/X86/IntrinsicTable.cs

@@ -41,8 +41,11 @@ namespace ARMeilleure.CodeGen.X86
             Add(Intrinsic.X86Cvtps2pd,   new IntrinsicInfo(X86Instruction.Cvtps2pd,   IntrinsicType.Unary));
             Add(Intrinsic.X86Cvtsd2si,   new IntrinsicInfo(X86Instruction.Cvtsd2si,   IntrinsicType.UnaryToGpr));
             Add(Intrinsic.X86Cvtsd2ss,   new IntrinsicInfo(X86Instruction.Cvtsd2ss,   IntrinsicType.Binary));
+            Add(Intrinsic.X86Cvtsi2sd,   new IntrinsicInfo(X86Instruction.Cvtsi2sd,   IntrinsicType.BinaryGpr));
             Add(Intrinsic.X86Cvtsi2si,   new IntrinsicInfo(X86Instruction.Movd,       IntrinsicType.UnaryToGpr));
+            Add(Intrinsic.X86Cvtsi2ss,   new IntrinsicInfo(X86Instruction.Cvtsi2ss,   IntrinsicType.BinaryGpr));
             Add(Intrinsic.X86Cvtss2sd,   new IntrinsicInfo(X86Instruction.Cvtss2sd,   IntrinsicType.Binary));
+            Add(Intrinsic.X86Cvtss2si,   new IntrinsicInfo(X86Instruction.Cvtss2si,   IntrinsicType.UnaryToGpr));
             Add(Intrinsic.X86Divpd,      new IntrinsicInfo(X86Instruction.Divpd,      IntrinsicType.Binary));
             Add(Intrinsic.X86Divps,      new IntrinsicInfo(X86Instruction.Divps,      IntrinsicType.Binary));
             Add(Intrinsic.X86Divsd,      new IntrinsicInfo(X86Instruction.Divsd,      IntrinsicType.Binary));

ARMeilleure/CodeGen/X86/IntrinsicType.cs

@@ -7,6 +7,7 @@ namespace ARMeilleure.CodeGen.X86
         Unary,
         UnaryToGpr,
         Binary,
+        BinaryGpr,
         BinaryImm,
         Ternary,
         TernaryImm

ARMeilleure/CodeGen/X86/X86Instruction.cs

@@ -38,6 +38,7 @@ namespace ARMeilleure.CodeGen.X86
         Cvtsi2sd,
         Cvtsi2ss,
         Cvtss2sd,
+        Cvtss2si,
         Div,
         Divpd,
         Divps,

ARMeilleure/Instructions/InstEmitAlu.cs

@@ -2,6 +2,7 @@ using ARMeilleure.Decoders;
 using ARMeilleure.IntermediateRepresentation;
 using ARMeilleure.State;
 using ARMeilleure.Translation;
+using System.Diagnostics;
 
 using static ARMeilleure.Instructions.InstEmitAluHelper;
 using static ARMeilleure.Instructions.InstEmitHelper;
@@ -265,16 +266,52 @@ namespace ARMeilleure.Instructions
 
             if (op.RegisterSize == RegisterSize.Int32)
             {
-                d = context.Call(new _U32_U32(SoftFallback.ReverseBits32), n);
+                d = EmitReverseBits32Op(context, n);
             }
             else
             {
-                d = context.Call(new _U64_U64(SoftFallback.ReverseBits64), n);
+                d = EmitReverseBits64Op(context, n);
             }
 
             SetAluDOrZR(context, d);
         }
 
+        private static Operand EmitReverseBits32Op(ArmEmitterContext context, Operand op)
+        {
+            Debug.Assert(op.Type == OperandType.I32);
+
+            Operand val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(op, Const(0xaaaaaaaau)), Const(1)),
+                                            context.ShiftLeft   (context.BitwiseAnd(op, Const(0x55555555u)), Const(1)));
+
+            val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(val, Const(0xccccccccu)), Const(2)),
+                                    context.ShiftLeft   (context.BitwiseAnd(val, Const(0x33333333u)), Const(2)));
+            val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(val, Const(0xf0f0f0f0u)), Const(4)),
+                                    context.ShiftLeft   (context.BitwiseAnd(val, Const(0x0f0f0f0fu)), Const(4)));
+            val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(val, Const(0xff00ff00u)), Const(8)),
+                                    context.ShiftLeft   (context.BitwiseAnd(val, Const(0x00ff00ffu)), Const(8)));
+
+            return context.BitwiseOr(context.ShiftRightUI(val, Const(16)), context.ShiftLeft(val, Const(16)));
+        }
+
+        private static Operand EmitReverseBits64Op(ArmEmitterContext context, Operand op)
+        {
+            Debug.Assert(op.Type == OperandType.I64);
+
+            Operand val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(op, Const(0xaaaaaaaaaaaaaaaaul)), Const(1)),
+                                            context.ShiftLeft   (context.BitwiseAnd(op, Const(0x5555555555555555ul)), Const(1)));
+
+            val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(val, Const(0xccccccccccccccccul)), Const(2)),
+                                    context.ShiftLeft   (context.BitwiseAnd(val, Const(0x3333333333333333ul)), Const(2)));
+            val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(val, Const(0xf0f0f0f0f0f0f0f0ul)), Const(4)),
+                                    context.ShiftLeft   (context.BitwiseAnd(val, Const(0x0f0f0f0f0f0f0f0ful)), Const(4)));
+            val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(val, Const(0xff00ff00ff00ff00ul)), Const(8)),
+                                    context.ShiftLeft   (context.BitwiseAnd(val, Const(0x00ff00ff00ff00fful)), Const(8)));
+            val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(val, Const(0xffff0000ffff0000ul)), Const(16)),
+                                    context.ShiftLeft   (context.BitwiseAnd(val, Const(0x0000ffff0000fffful)), Const(16)));
+
+            return context.BitwiseOr(context.ShiftRightUI(val, Const(32)), context.ShiftLeft(val, Const(32)));
+        }
+
         public static void Rev16(ArmEmitterContext context)
         {
             OpCodeAlu op = (OpCodeAlu)context.CurrOp;
@@ -284,32 +321,60 @@ namespace ARMeilleure.Instructions
 
             if (op.RegisterSize == RegisterSize.Int32)
             {
-                d = context.Call(new _U32_U32(SoftFallback.ReverseBytes16_32), n);
+                d = EmitReverseBytes16_32Op(context, n);
             }
             else
             {
-                d = context.Call(new _U64_U64(SoftFallback.ReverseBytes16_64), n);
+                d = EmitReverseBytes16_64Op(context, n);
             }
 
             SetAluDOrZR(context, d);
         }
 
+        private static Operand EmitReverseBytes16_32Op(ArmEmitterContext context, Operand op)
+        {
+            Debug.Assert(op.Type == OperandType.I32);
+
+            Operand val = EmitReverseBytes16_64Op(context, context.ZeroExtend32(OperandType.I64, op));
+
+            return context.ConvertI64ToI32(val);
+        }
+
+        private static Operand EmitReverseBytes16_64Op(ArmEmitterContext context, Operand op)
+        {
+            Debug.Assert(op.Type == OperandType.I64);
+
+            return context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(op, Const(0xff00ff00ff00ff00ul)), Const(8)),
+                                     context.ShiftLeft   (context.BitwiseAnd(op, Const(0x00ff00ff00ff00fful)), Const(8)));
+        }
+
         public static void Rev32(ArmEmitterContext context)
         {
             OpCodeAlu op = (OpCodeAlu)context.CurrOp;
 
             Operand n = GetIntOrZR(context, op.Rn);
+            Operand d;
 
             if (op.RegisterSize == RegisterSize.Int32)
             {
-                SetAluDOrZR(context, context.ByteSwap(n));
+                d = context.ByteSwap(n);
             }
             else
             {
-                Operand d = context.Call(new _U64_U64(SoftFallback.ReverseBytes32_64), n);
-
-                SetAluDOrZR(context, d);
+                d = EmitReverseBytes32_64Op(context, n);
             }
+
+            SetAluDOrZR(context, d);
+        }
+
+        private static Operand EmitReverseBytes32_64Op(ArmEmitterContext context, Operand op)
+        {
+            Debug.Assert(op.Type == OperandType.I64);
+
+            Operand val = EmitReverseBytes16_64Op(context, op);
+
+            return context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(val, Const(0xffff0000ffff0000ul)), Const(16)),
+                                     context.ShiftLeft   (context.BitwiseAnd(val, Const(0x0000ffff0000fffful)), Const(16)));
         }
 
         public static void Rev64(ArmEmitterContext context)

ARMeilleure/Instructions/InstEmitSimdArithmetic.cs

@@ -77,7 +77,14 @@ namespace ARMeilleure.Instructions
 
         public static void Addp_V(ArmEmitterContext context)
         {
-            EmitVectorPairwiseOpZx(context, (op1, op2) => context.Add(op1, op2));
+            if (Optimizations.UseSsse3)
+            {
+                EmitSsse3VectorPairwiseOp(context, X86PaddInstruction);
+            }
+            else
+            {
+                EmitVectorPairwiseOpZx(context, (op1, op2) => context.Add(op1, op2));
+            }
         }
 
         public static void Addv_V(ArmEmitterContext context)
@@ -399,7 +406,7 @@ namespace ARMeilleure.Instructions
         {
             if (Optimizations.FastFP && Optimizations.UseSse2)
             {
-                EmitVectorPairwiseOpF(context, Intrinsic.X86Addps, Intrinsic.X86Addpd);
+                EmitSse2VectorPairwiseOpF(context, Intrinsic.X86Addps, Intrinsic.X86Addpd);
             }
             else
             {
@@ -547,7 +554,7 @@ namespace ARMeilleure.Instructions
         {
             if (Optimizations.FastFP && Optimizations.UseSse2)
             {
-                EmitVectorPairwiseOpF(context, Intrinsic.X86Maxps, Intrinsic.X86Maxpd);
+                EmitSse2VectorPairwiseOpF(context, Intrinsic.X86Maxps, Intrinsic.X86Maxpd);
             }
             else
             {
@@ -622,7 +629,7 @@ namespace ARMeilleure.Instructions
         {
             if (Optimizations.FastFP && Optimizations.UseSse2)
             {
-                EmitVectorPairwiseOpF(context, Intrinsic.X86Minps, Intrinsic.X86Minpd);
+                EmitSse2VectorPairwiseOpF(context, Intrinsic.X86Minps, Intrinsic.X86Minpd);
             }
             else
             {
@@ -664,7 +671,7 @@ namespace ARMeilleure.Instructions
                         res = context.VectorZeroUpper64(res);
                     }
 
-                    context.Copy(GetVec(op.Rd), res);
+                    context.Copy(d, res);
                 }
                 else /* if (sizeF == 1) */
                 {
@@ -672,7 +679,7 @@ namespace ARMeilleure.Instructions
 
                     res = context.AddIntrinsic(Intrinsic.X86Addpd, d, res);
 
-                    context.Copy(GetVec(op.Rd), res);
+                    context.Copy(d, res);
                 }
             }
             else
@@ -710,7 +717,7 @@ namespace ARMeilleure.Instructions
                         res = context.VectorZeroUpper64(res);
                     }
 
-                    context.Copy(GetVec(op.Rd), res);
+                    context.Copy(d, res);
                 }
                 else /* if (sizeF == 1) */
                 {
@@ -721,7 +728,7 @@ namespace ARMeilleure.Instructions
                     res = context.AddIntrinsic(Intrinsic.X86Mulpd, n, res);
                     res = context.AddIntrinsic(Intrinsic.X86Addpd, d, res);
 
-                    context.Copy(GetVec(op.Rd), res);
+                    context.Copy(d, res);
                 }
             }
             else
@@ -764,7 +771,7 @@ namespace ARMeilleure.Instructions
                         res = context.VectorZeroUpper64(res);
                     }
 
-                    context.Copy(GetVec(op.Rd), res);
+                    context.Copy(d, res);
                 }
                 else /* if (sizeF == 1) */
                 {
@@ -772,7 +779,7 @@ namespace ARMeilleure.Instructions
 
                     res = context.AddIntrinsic(Intrinsic.X86Subpd, d, res);
 
-                    context.Copy(GetVec(op.Rd), res);
+                    context.Copy(d, res);
                 }
             }
             else
@@ -810,7 +817,7 @@ namespace ARMeilleure.Instructions
                         res = context.VectorZeroUpper64(res);
                     }
 
-                    context.Copy(GetVec(op.Rd), res);
+                    context.Copy(d, res);
                 }
                 else /* if (sizeF == 1) */
                 {
@@ -821,7 +828,7 @@ namespace ARMeilleure.Instructions
                     res = context.AddIntrinsic(Intrinsic.X86Mulpd, n, res);
                     res = context.AddIntrinsic(Intrinsic.X86Subpd, d, res);
 
-                    context.Copy(GetVec(op.Rd), res);
+                    context.Copy(d, res);
                 }
             }
             else
@@ -2028,9 +2035,16 @@ namespace ARMeilleure.Instructions
 
         public static void Smaxp_V(ArmEmitterContext context)
         {
-            Delegate dlg = new _S64_S64_S64(Math.Max);
+            if (Optimizations.UseSsse3)
+            {
+                EmitSsse3VectorPairwiseOp(context, X86PmaxsInstruction);
+            }
+            else
+            {
+                Delegate dlg = new _S64_S64_S64(Math.Max);
 
-            EmitVectorPairwiseOpSx(context, (op1, op2) => context.Call(dlg, op1, op2));
+                EmitVectorPairwiseOpSx(context, (op1, op2) => context.Call(dlg, op1, op2));
+            }
         }
 
         public static void Smaxv_V(ArmEmitterContext context)
@@ -2070,9 +2084,16 @@ namespace ARMeilleure.Instructions
 
         public static void Sminp_V(ArmEmitterContext context)
         {
-            Delegate dlg = new _S64_S64_S64(Math.Min);
+            if (Optimizations.UseSsse3)
+            {
+                EmitSsse3VectorPairwiseOp(context, X86PminsInstruction);
+            }
+            else
+            {
+                Delegate dlg = new _S64_S64_S64(Math.Min);
 
-            EmitVectorPairwiseOpSx(context, (op1, op2) => context.Call(dlg, op1, op2));
+                EmitVectorPairwiseOpSx(context, (op1, op2) => context.Call(dlg, op1, op2));
+            }
         }
 
         public static void Sminv_V(ArmEmitterContext context)
@@ -2653,9 +2674,16 @@ namespace ARMeilleure.Instructions
 
         public static void Umaxp_V(ArmEmitterContext context)
         {
-            Delegate dlg = new _U64_U64_U64(Math.Max);
+            if (Optimizations.UseSsse3)
+            {
+                EmitSsse3VectorPairwiseOp(context, X86PmaxuInstruction);
+            }
+            else
+            {
+                Delegate dlg = new _U64_U64_U64(Math.Max);
 
-            EmitVectorPairwiseOpZx(context, (op1, op2) => context.Call(dlg, op1, op2));
+                EmitVectorPairwiseOpZx(context, (op1, op2) => context.Call(dlg, op1, op2));
+            }
         }
 
         public static void Umaxv_V(ArmEmitterContext context)
@@ -2695,9 +2723,16 @@ namespace ARMeilleure.Instructions
 
         public static void Uminp_V(ArmEmitterContext context)
         {
-            Delegate dlg = new _U64_U64_U64(Math.Min);
+            if (Optimizations.UseSsse3)
+            {
+                EmitSsse3VectorPairwiseOp(context, X86PminuInstruction);
+            }
+            else
+            {
+                Delegate dlg = new _U64_U64_U64(Math.Min);
 
-            EmitVectorPairwiseOpZx(context, (op1, op2) => context.Call(dlg, op1, op2));
+                EmitVectorPairwiseOpZx(context, (op1, op2) => context.Call(dlg, op1, op2));
+            }
         }
 
         public static void Uminv_V(ArmEmitterContext context)
@@ -3020,7 +3055,9 @@ namespace ARMeilleure.Instructions
 
             int part = op.RegisterSize == RegisterSize.Simd128 ? elems : 0;
 
-            Operand res = part == 0 ? context.VectorZero() : context.Copy(GetVec(op.Rd));
+            Operand d = GetVec(op.Rd);
+
+            Operand res = part == 0 ? context.VectorZero() : context.Copy(d);
 
             long roundConst = 1L << (eSize - 1);
 
@@ -3041,7 +3078,7 @@ namespace ARMeilleure.Instructions
                 res = EmitVectorInsert(context, res, de, part + index, op.Size);
             }
 
-            context.Copy(GetVec(op.Rd), res);
+            context.Copy(d, res);
         }
 
         public static void EmitScalarRoundOpF(ArmEmitterContext context, FPRoundingMode roundMode)
@@ -3124,12 +3161,12 @@ namespace ARMeilleure.Instructions
             Operand n = GetVec(op.Rn);
             Operand m = GetVec(op.Rm);
 
-            Operand nQNaNMask = EmitSse2VectorIsQNaNOpF(context, n);
-            Operand mQNaNMask = EmitSse2VectorIsQNaNOpF(context, m);
-
             Operand nNum = context.Copy(n);
             Operand mNum = context.Copy(m);
 
+            Operand nQNaNMask = EmitSse2VectorIsQNaNOpF(context, nNum);
+            Operand mQNaNMask = EmitSse2VectorIsQNaNOpF(context, mNum);
+
             int sizeF = op.Size & 1;
 
             if (sizeF == 0)

ARMeilleure/Instructions/InstEmitSimdCvt.cs

@@ -163,12 +163,26 @@ namespace ARMeilleure.Instructions
 
         public static void Fcvtms_Gp(ArmEmitterContext context)
         {
-            EmitFcvt_s_Gp(context, (op1) => EmitUnaryMathCall(context, MathF.Floor, Math.Floor, op1));
+            if (Optimizations.UseSse41)
+            {
+                EmitSse41Fcvts_Gp(context, FPRoundingMode.TowardsMinusInfinity, isFixed: false);
+            }
+            else
+            {
+                EmitFcvt_s_Gp(context, (op1) => EmitUnaryMathCall(context, MathF.Floor, Math.Floor, op1));
+            }
         }
 
         public static void Fcvtmu_Gp(ArmEmitterContext context)
         {
-            EmitFcvt_u_Gp(context, (op1) => EmitUnaryMathCall(context, MathF.Floor, Math.Floor, op1));
+            if (Optimizations.UseSse41)
+            {
+                EmitSse41Fcvtu_Gp(context, FPRoundingMode.TowardsMinusInfinity, isFixed: false);
+            }
+            else
+            {
+                EmitFcvt_u_Gp(context, (op1) => EmitUnaryMathCall(context, MathF.Floor, Math.Floor, op1));
+            }
         }
 
         public static void Fcvtn_V(ArmEmitterContext context)
@@ -180,11 +194,10 @@ namespace ARMeilleure.Instructions
             if (Optimizations.UseSse2 && sizeF == 1)
             {
                 Operand d = GetVec(op.Rd);
-                Operand n = GetVec(op.Rn);
 
-                Operand res = context.AddIntrinsic(Intrinsic.X86Movlhps, d, context.VectorZero());
+                Operand res = context.VectorZeroUpper64(d);
 
-                Operand nInt = context.AddIntrinsic(Intrinsic.X86Cvtpd2ps, n);
+                Operand nInt = context.AddIntrinsic(Intrinsic.X86Cvtpd2ps, GetVec(op.Rn));
 
                 nInt = context.AddIntrinsic(Intrinsic.X86Movlhps, nInt, nInt);
 
@@ -194,7 +207,7 @@ namespace ARMeilleure.Instructions
 
                 res = context.AddIntrinsic(movInst, res, nInt);
 
-                context.Copy(GetVec(op.Rd), res);
+                context.Copy(d, res);
             }
             else
             {
@@ -204,7 +217,9 @@ namespace ARMeilleure.Instructions
 
                 int part = op.RegisterSize == RegisterSize.Simd128 ? elems : 0;
 
-                Operand res = part == 0 ? context.VectorZero() : context.Copy(GetVec(op.Rd));
+                Operand d = GetVec(op.Rd);
+
+                Operand res = part == 0 ? context.VectorZero() : context.Copy(d);
 
                 for (int index = 0; index < elems; index++)
                 {
@@ -228,7 +243,7 @@ namespace ARMeilleure.Instructions
                     }
                 }
 
-                context.Copy(GetVec(op.Rd), res);
+                context.Copy(d, res);
             }
         }
 
@@ -282,22 +297,50 @@ namespace ARMeilleure.Instructions
 
         public static void Fcvtps_Gp(ArmEmitterContext context)
         {
-            EmitFcvt_s_Gp(context, (op1) => EmitUnaryMathCall(context, MathF.Ceiling, Math.Ceiling, op1));
+            if (Optimizations.UseSse41)
+            {
+                EmitSse41Fcvts_Gp(context, FPRoundingMode.TowardsPlusInfinity, isFixed: false);
+            }
+            else
+            {
+                EmitFcvt_s_Gp(context, (op1) => EmitUnaryMathCall(context, MathF.Ceiling, Math.Ceiling, op1));
+            }
         }
 
         public static void Fcvtpu_Gp(ArmEmitterContext context)
         {
-            EmitFcvt_u_Gp(context, (op1) => EmitUnaryMathCall(context, MathF.Ceiling, Math.Ceiling, op1));
+            if (Optimizations.UseSse41)
+            {
+                EmitSse41Fcvtu_Gp(context, FPRoundingMode.TowardsPlusInfinity, isFixed: false);
+            }
+            else
+            {
+                EmitFcvt_u_Gp(context, (op1) => EmitUnaryMathCall(context, MathF.Ceiling, Math.Ceiling, op1));
+            }
         }
 
         public static void Fcvtzs_Gp(ArmEmitterContext context)
         {
-            EmitFcvt_s_Gp(context, (op1) => op1);
+            if (Optimizations.UseSse41)
+            {
+                EmitSse41Fcvts_Gp(context, FPRoundingMode.TowardsZero, isFixed: false);
+            }
+            else
+            {
+                EmitFcvt_s_Gp(context, (op1) => op1);
+            }
         }
 
         public static void Fcvtzs_Gp_Fixed(ArmEmitterContext context)
         {
-            EmitFcvtzs_Gp_Fixed(context);
+            if (Optimizations.UseSse41)
+            {
+                EmitSse41Fcvts_Gp(context, FPRoundingMode.TowardsZero, isFixed: true);
+            }
+            else
+            {
+                EmitFcvtzs_Gp_Fixed(context);
+            }
         }
 
         public static void Fcvtzs_S(ArmEmitterContext context)
@@ -338,12 +381,26 @@ namespace ARMeilleure.Instructions
 
         public static void Fcvtzu_Gp(ArmEmitterContext context)
         {
-            EmitFcvt_u_Gp(context, (op1) => op1);
+            if (Optimizations.UseSse41)
+            {
+                EmitSse41Fcvtu_Gp(context, FPRoundingMode.TowardsZero, isFixed: false);
+            }
+            else
+            {
+                EmitFcvt_u_Gp(context, (op1) => op1);
+            }
         }
 
         public static void Fcvtzu_Gp_Fixed(ArmEmitterContext context)
         {
-            EmitFcvtzu_Gp_Fixed(context);
+            if (Optimizations.UseSse41)
+            {
+                EmitSse41Fcvtu_Gp(context, FPRoundingMode.TowardsZero, isFixed: true);
+            }
+            else
+            {
+                EmitFcvtzu_Gp_Fixed(context);
+            }
         }
 
         public static void Fcvtzu_S(ArmEmitterContext context)
@@ -418,16 +475,16 @@ namespace ARMeilleure.Instructions
 
         public static void Scvtf_S(ArmEmitterContext context)
         {
-            OpCodeSimd op = (OpCodeSimd)context.CurrOp;
-
-            int sizeF = op.Size & 1;
-
-            if (Optimizations.UseSse2 && sizeF == 0)
+            if (Optimizations.UseSse2)
             {
                 EmitSse2Scvtf(context, scalar: true);
             }
             else
             {
+                OpCodeSimd op = (OpCodeSimd)context.CurrOp;
+
+                int sizeF = op.Size & 1;
+
                 Operand res = EmitVectorLongExtract(context, op.Rn, 0, sizeF + 2);
 
                 res = EmitFPConvert(context, res, op.Size, signed: true);
@@ -438,11 +495,7 @@ namespace ARMeilleure.Instructions
 
         public static void Scvtf_V(ArmEmitterContext context)
         {
-            OpCodeSimd op = (OpCodeSimd)context.CurrOp;
-
-            int sizeF = op.Size & 1;
-
-            if (Optimizations.UseSse2 && sizeF == 0)
+            if (Optimizations.UseSse2)
             {
                 EmitSse2Scvtf(context, scalar: false);
             }
@@ -454,12 +507,7 @@ namespace ARMeilleure.Instructions
 
         public static void Scvtf_V_Fixed(ArmEmitterContext context)
         {
-            OpCodeSimd op = (OpCodeSimd)context.CurrOp;
-
-            // sizeF == ((OpCodeSimdShImm64)op).Size - 2
-            int sizeF = op.Size & 1;
-
-            if (Optimizations.UseSse2 && sizeF == 0)
+            if (Optimizations.UseSse2)
             {
                 EmitSse2Scvtf(context, scalar: false);
             }
@@ -495,16 +543,16 @@ namespace ARMeilleure.Instructions
 
         public static void Ucvtf_S(ArmEmitterContext context)
         {
-            OpCodeSimd op = (OpCodeSimd)context.CurrOp;
-
-            int sizeF = op.Size & 1;
-
-            if (Optimizations.UseSse2 && sizeF == 0)
+            if (Optimizations.UseSse2)
             {
                 EmitSse2Ucvtf(context, scalar: true);
             }
             else
             {
+                OpCodeSimd op = (OpCodeSimd)context.CurrOp;
+
+                int sizeF = op.Size & 1;
+
                 Operand ne = EmitVectorLongExtract(context, op.Rn, 0, sizeF + 2);
 
                 Operand res = EmitFPConvert(context, ne, sizeF, signed: false);
@@ -515,11 +563,7 @@ namespace ARMeilleure.Instructions
 
         public static void Ucvtf_V(ArmEmitterContext context)
         {
-            OpCodeSimd op = (OpCodeSimd)context.CurrOp;
-
-            int sizeF = op.Size & 1;
-
-            if (Optimizations.UseSse2 && sizeF == 0)
+            if (Optimizations.UseSse2)
             {
                 EmitSse2Ucvtf(context, scalar: false);
             }
@@ -531,12 +575,7 @@ namespace ARMeilleure.Instructions
 
         public static void Ucvtf_V_Fixed(ArmEmitterContext context)
         {
-            OpCodeSimd op = (OpCodeSimd)context.CurrOp;
-
-            // sizeF == ((OpCodeSimdShImm)op).Size - 2
-            int sizeF = op.Size & 1;
-
-            if (Optimizations.UseSse2 && sizeF == 0)
+            if (Optimizations.UseSse2)
             {
                 EmitSse2Ucvtf(context, scalar: false);
             }
@@ -830,42 +869,145 @@ namespace ARMeilleure.Instructions
             }
         }
 
-        private static void EmitSse41Fcvts(ArmEmitterContext context, FPRoundingMode roundMode, bool scalar)
+        private static Operand EmitSse2CvtDoubleToInt64OpF(ArmEmitterContext context, Operand opF, bool scalar)
+        {
+            Debug.Assert(opF.Type == OperandType.V128);
+
+            Operand longL = context.AddIntrinsicLong  (Intrinsic.X86Cvtsd2si, opF); // opFL
+            Operand res   = context.VectorCreateScalar(longL);
+
+            if (!scalar)
+            {
+                Operand opFH  = context.AddIntrinsic      (Intrinsic.X86Movhlps,  res, opF); // res doesn't matter.
+                Operand longH = context.AddIntrinsicLong  (Intrinsic.X86Cvtsd2si, opFH);
+                Operand resH  = context.VectorCreateScalar(longH);
+                        res   = context.AddIntrinsic      (Intrinsic.X86Movlhps,  res, resH);
+            }
+
+            return res;
+        }
+
+        private static Operand EmitSse2CvtInt64ToDoubleOp(ArmEmitterContext context, Operand op, bool scalar)
+        {
+            Debug.Assert(op.Type == OperandType.V128);
+
+            Operand longL = context.AddIntrinsicLong(Intrinsic.X86Cvtsi2si, op); // opL
+            Operand res   = context.AddIntrinsic    (Intrinsic.X86Cvtsi2sd, context.VectorZero(), longL);
+
+            if (!scalar)
+            {
+                Operand opH   = context.AddIntrinsic    (Intrinsic.X86Movhlps,  res, op);    // res doesn't matter.
+                Operand longH = context.AddIntrinsicLong(Intrinsic.X86Cvtsi2si, opH);
+                Operand resH  = context.AddIntrinsic    (Intrinsic.X86Cvtsi2sd, res, longH); // res doesn't matter.
+                        res   = context.AddIntrinsic    (Intrinsic.X86Movlhps,  res, resH);
+            }
+
+            return res;
+        }
+
+        private static void EmitSse2Scvtf(ArmEmitterContext context, bool scalar)
         {
             OpCodeSimd op = (OpCodeSimd)context.CurrOp;
 
             Operand n = GetVec(op.Rn);
 
-            // sizeF == ((OpCodeSimdShImm64)op).Size - 2
+            // sizeF == ((OpCodeSimdShImm)op).Size - 2
             int sizeF = op.Size & 1;
 
             if (sizeF == 0)
             {
-                Operand nMask = context.AddIntrinsic(Intrinsic.X86Cmpps, n, n, Const((int)CmpCondition.OrderedQ));
+                Operand res = context.AddIntrinsic(Intrinsic.X86Cvtdq2ps, n);
+
+                if (op is OpCodeSimdShImm fixedOp)
+                {
+                    int fBits = GetImmShr(fixedOp);
+
+                    // BitConverter.Int32BitsToSingle(fpScaled) == 1f / MathF.Pow(2f, fBits)
+                    int fpScaled = 0x3F800000 - fBits * 0x800000;
+
+                    Operand fpScaledMask = scalar
+                        ? X86GetScalar     (context, fpScaled)
+                        : X86GetAllElements(context, fpScaled);
+
+                    res = context.AddIntrinsic(Intrinsic.X86Mulps, res, fpScaledMask);
+                }
+
+                if (scalar)
+                {
+                    res = context.VectorZeroUpper96(res);
+                }
+                else if (op.RegisterSize == RegisterSize.Simd64)
+                {
+                    res = context.VectorZeroUpper64(res);
+                }
 
-                Operand nScaled = context.AddIntrinsic(Intrinsic.X86Pand, nMask, n);
+                context.Copy(GetVec(op.Rd), res);
+            }
+            else /* if (sizeF == 1) */
+            {
+                Operand res = EmitSse2CvtInt64ToDoubleOp(context, n, scalar);
 
                 if (op is OpCodeSimdShImm fixedOp)
                 {
                     int fBits = GetImmShr(fixedOp);
 
-                    // BitConverter.Int32BitsToSingle(fpScaled) == MathF.Pow(2f, fBits)
-                    int fpScaled = 0x3F800000 + fBits * 0x800000;
+                    // BitConverter.Int64BitsToDouble(fpScaled) == 1d / Math.Pow(2d, fBits)
+                    long fpScaled = 0x3FF0000000000000L - fBits * 0x10000000000000L;
 
-                    Operand scale = X86GetAllElements(context, fpScaled);
+                    Operand fpScaledMask = scalar
+                        ? X86GetScalar     (context, fpScaled)
+                        : X86GetAllElements(context, fpScaled);
 
-                    nScaled = context.AddIntrinsic(Intrinsic.X86Mulps, nScaled, scale);
+                    res = context.AddIntrinsic(Intrinsic.X86Mulpd, res, fpScaledMask);
                 }
 
-                Operand nRnd = context.AddIntrinsic(Intrinsic.X86Roundps, nScaled, Const(X86GetRoundControl(roundMode)));
+                if (scalar)
+                {
+                    res = context.VectorZeroUpper64(res);
+                }
 
-                Operand nInt = context.AddIntrinsic(Intrinsic.X86Cvtps2dq, nRnd);
+                context.Copy(GetVec(op.Rd), res);
+            }
+        }
+
+        private static void EmitSse2Ucvtf(ArmEmitterContext context, bool scalar)
+        {
+            OpCodeSimd op = (OpCodeSimd)context.CurrOp;
+
+            Operand n = GetVec(op.Rn);
+
+            // sizeF == ((OpCodeSimdShImm)op).Size - 2
+            int sizeF = op.Size & 1;
+
+            if (sizeF == 0)
+            {
+                Operand mask = scalar // 65536.000f (1 << 16)
+                    ? X86GetScalar     (context, 0x47800000)
+                    : X86GetAllElements(context, 0x47800000);
+
+                Operand res = context.AddIntrinsic(Intrinsic.X86Psrld, n, Const(16));
+                        res = context.AddIntrinsic(Intrinsic.X86Cvtdq2ps, res);
+                        res = context.AddIntrinsic(Intrinsic.X86Mulps, res, mask);
+
+                Operand res2 = context.AddIntrinsic(Intrinsic.X86Pslld, n, Const(16));
+                        res2 = context.AddIntrinsic(Intrinsic.X86Psrld, res2, Const(16));
+                        res2 = context.AddIntrinsic(Intrinsic.X86Cvtdq2ps, res2);
+
+                res = context.AddIntrinsic(Intrinsic.X86Addps, res, res2);
+
+                if (op is OpCodeSimdShImm fixedOp)
+                {
+                    int fBits = GetImmShr(fixedOp);
 
-                Operand mask = X86GetAllElements(context, 0x4F000000); // 2.14748365E9f (2147483648)
+                    // BitConverter.Int32BitsToSingle(fpScaled) == 1f / MathF.Pow(2f, fBits)
+                    int fpScaled = 0x3F800000 - fBits * 0x800000;
 
-                Operand mask2 = context.AddIntrinsic(Intrinsic.X86Cmpps, nRnd, mask, Const((int)CmpCondition.NotLessThan));
+                    Operand fpScaledMask = scalar
+                        ? X86GetScalar     (context, fpScaled)
+                        : X86GetAllElements(context, fpScaled);
 
-                Operand res = context.AddIntrinsic(Intrinsic.X86Pxor, nInt, mask2);
+                    res = context.AddIntrinsic(Intrinsic.X86Mulps, res, fpScaledMask);
+                }
 
                 if (scalar)
                 {
@@ -880,52 +1022,131 @@ namespace ARMeilleure.Instructions
             }
             else /* if (sizeF == 1) */
             {
-                Operand nMask = context.AddIntrinsic(Intrinsic.X86Cmppd, n, n, Const((int)CmpCondition.OrderedQ));
+                Operand mask = scalar // 4294967296.0000000d (1L << 32)
+                    ? X86GetScalar     (context, 0x41F0000000000000L)
+                    : X86GetAllElements(context, 0x41F0000000000000L);
+
+                Operand res = context.AddIntrinsic      (Intrinsic.X86Psrlq, n, Const(32));
+                        res = EmitSse2CvtInt64ToDoubleOp(context, res, scalar);
+                        res = context.AddIntrinsic      (Intrinsic.X86Mulpd, res, mask);
 
-                Operand nScaled = context.AddIntrinsic(Intrinsic.X86Pand, nMask, n);
+                Operand res2 = context.AddIntrinsic      (Intrinsic.X86Psllq, n, Const(32));
+                        res2 = context.AddIntrinsic      (Intrinsic.X86Psrlq, res2, Const(32));
+                        res2 = EmitSse2CvtInt64ToDoubleOp(context, res2, scalar);
+
+                res = context.AddIntrinsic(Intrinsic.X86Addpd, res, res2);
 
                 if (op is OpCodeSimdShImm fixedOp)
                 {
                     int fBits = GetImmShr(fixedOp);
 
-                    // BitConverter.Int64BitsToDouble(fpScaled) == Math.Pow(2d, fBits)
-                    long fpScaled = 0x3FF0000000000000L + fBits * 0x10000000000000L;
+                    // BitConverter.Int64BitsToDouble(fpScaled) == 1d / Math.Pow(2d, fBits)
+                    long fpScaled = 0x3FF0000000000000L - fBits * 0x10000000000000L;
 
-                    Operand scale = X86GetAllElements(context, fpScaled);
+                    Operand fpScaledMask = scalar
+                        ? X86GetScalar     (context, fpScaled)
+                        : X86GetAllElements(context, fpScaled);
 
-                    nScaled = context.AddIntrinsic(Intrinsic.X86Mulpd, nScaled, scale);
+                    res = context.AddIntrinsic(Intrinsic.X86Mulpd, res, fpScaledMask);
                 }
 
-                Operand nRnd = context.AddIntrinsic(Intrinsic.X86Roundpd, nScaled, Const(X86GetRoundControl(roundMode)));
+                if (scalar)
+                {
+                    res = context.VectorZeroUpper64(res);
+                }
+
+                context.Copy(GetVec(op.Rd), res);
+            }
+        }
+
+        private static void EmitSse41Fcvts(ArmEmitterContext context, FPRoundingMode roundMode, bool scalar)
+        {
+            OpCodeSimd op = (OpCodeSimd)context.CurrOp;
+
+            Operand n = GetVec(op.Rn);
 
-                Operand high;
+            // sizeF == ((OpCodeSimdShImm)op).Size - 2
+            int sizeF = op.Size & 1;
+
+            if (sizeF == 0)
+            {
+                Operand nRes = context.AddIntrinsic(Intrinsic.X86Cmpps, n, n, Const((int)CmpCondition.OrderedQ));
+                        nRes = context.AddIntrinsic(Intrinsic.X86Pand, nRes, n);
 
-                if (!scalar)
+                if (op is OpCodeSimdShImm fixedOp)
                 {
-                    high = context.AddIntrinsic(Intrinsic.X86Unpckhpd, nRnd, nRnd);
-                    high = context.AddIntrinsicLong(Intrinsic.X86Cvtsd2si, high);
+                    int fBits = GetImmShr(fixedOp);
+
+                    // BitConverter.Int32BitsToSingle(fpScaled) == MathF.Pow(2f, fBits)
+                    int fpScaled = 0x3F800000 + fBits * 0x800000;
+
+                    Operand fpScaledMask = scalar
+                        ? X86GetScalar     (context, fpScaled)
+                        : X86GetAllElements(context, fpScaled);
+
+                    nRes = context.AddIntrinsic(Intrinsic.X86Mulps, nRes, fpScaledMask);
                 }
-                else
+
+                nRes = context.AddIntrinsic(Intrinsic.X86Roundps, nRes, Const(X86GetRoundControl(roundMode)));
+
+                Operand nInt = context.AddIntrinsic(Intrinsic.X86Cvtps2dq, nRes);
+
+                Operand fpMaxValMask = scalar // 2.14748365E9f (2147483648)
+                    ? X86GetScalar     (context, 0x4F000000)
+                    : X86GetAllElements(context, 0x4F000000);
+
+                nRes = context.AddIntrinsic(Intrinsic.X86Cmpps, nRes, fpMaxValMask, Const((int)CmpCondition.NotLessThan));
+
+                Operand dRes = context.AddIntrinsic(Intrinsic.X86Pxor, nInt, nRes);
+
+                if (scalar)
+                {
+                    dRes = context.VectorZeroUpper96(dRes);
+                }
+                else if (op.RegisterSize == RegisterSize.Simd64)
                 {
-                    high = Const(0L);
+                    dRes = context.VectorZeroUpper64(dRes);
+                }
+
+                context.Copy(GetVec(op.Rd), dRes);
+            }
+            else /* if (sizeF == 1) */
+            {
+                Operand nRes = context.AddIntrinsic(Intrinsic.X86Cmppd, n, n, Const((int)CmpCondition.OrderedQ));
+                        nRes = context.AddIntrinsic(Intrinsic.X86Pand, nRes, n);
+
+                if (op is OpCodeSimdShImm fixedOp)
+                {
+                    int fBits = GetImmShr(fixedOp);
+
+                    // BitConverter.Int64BitsToDouble(fpScaled) == Math.Pow(2d, fBits)
+                    long fpScaled = 0x3FF0000000000000L + fBits * 0x10000000000000L;
+
+                    Operand fpScaledMask = scalar
+                        ? X86GetScalar     (context, fpScaled)
+                        : X86GetAllElements(context, fpScaled);
+
+                    nRes = context.AddIntrinsic(Intrinsic.X86Mulpd, nRes, fpScaledMask);
                 }
 
-                Operand low = context.AddIntrinsicLong(Intrinsic.X86Cvtsd2si, nRnd);
+                nRes = context.AddIntrinsic(Intrinsic.X86Roundpd, nRes, Const(X86GetRoundControl(roundMode)));
 
-                Operand nInt = EmitVectorLongCreate(context, low, high);
+                Operand nLong = EmitSse2CvtDoubleToInt64OpF(context, nRes, scalar);
 
-                Operand mask = X86GetAllElements(context, 0x43E0000000000000L); // 9.2233720368547760E18d (9223372036854775808)
+                Operand fpMaxValMask = scalar // 9.2233720368547760E18d (9223372036854775808)
+                    ? X86GetScalar     (context, 0x43E0000000000000L)
+                    : X86GetAllElements(context, 0x43E0000000000000L);
 
-                Operand mask2 = context.AddIntrinsic(Intrinsic.X86Cmppd, nRnd, mask, Const((int)CmpCondition.NotLessThan));
+                nRes = context.AddIntrinsic(Intrinsic.X86Cmppd, nRes, fpMaxValMask, Const((int)CmpCondition.NotLessThan));
 
-                Operand res = context.AddIntrinsic(Intrinsic.X86Pxor, nInt, mask2);
+                Operand dRes = context.AddIntrinsic(Intrinsic.X86Pxor, nLong, nRes);
 
                 if (scalar)
                 {
-                    res = context.VectorZeroUpper64(res);
+                    dRes = context.VectorZeroUpper64(dRes);
                 }
 
-                context.Copy(GetVec(op.Rd), res);
+                context.Copy(GetVec(op.Rd), dRes);
             }
         }
 
@@ -940,9 +1161,8 @@ namespace ARMeilleure.Instructions
 
             if (sizeF == 0)
             {
-                Operand nMask = context.AddIntrinsic(Intrinsic.X86Cmpps, n, n, Const((int)CmpCondition.OrderedQ));
-
-                Operand nScaled = context.AddIntrinsic(Intrinsic.X86Pand, nMask, n);
+                Operand nRes = context.AddIntrinsic(Intrinsic.X86Cmpps, n, n, Const((int)CmpCondition.OrderedQ));
+                        nRes = context.AddIntrinsic(Intrinsic.X86Pand, nRes, n);
 
                 if (op is OpCodeSimdShImm fixedOp)
                 {
@@ -951,50 +1171,53 @@ namespace ARMeilleure.Instructions
                     // BitConverter.Int32BitsToSingle(fpScaled) == MathF.Pow(2f, fBits)
                     int fpScaled = 0x3F800000 + fBits * 0x800000;
 
-                    Operand scale = X86GetAllElements(context, fpScaled);
+                    Operand fpScaledMask = scalar
+                        ? X86GetScalar     (context, fpScaled)
+                        : X86GetAllElements(context, fpScaled);
 
-                    nScaled = context.AddIntrinsic(Intrinsic.X86Mulps, nScaled, scale);
+                    nRes = context.AddIntrinsic(Intrinsic.X86Mulps, nRes, fpScaledMask);
                 }
 
-                Operand nRnd = context.AddIntrinsic(Intrinsic.X86Roundps, nScaled, Const(X86GetRoundControl(roundMode)));
+                nRes = context.AddIntrinsic(Intrinsic.X86Roundps, nRes, Const(X86GetRoundControl(roundMode)));
 
-                Operand nRndMask = context.AddIntrinsic(Intrinsic.X86Cmpps, nRnd, context.VectorZero(), Const((int)CmpCondition.NotLessThanOrEqual));
+                Operand zero = context.VectorZero();
 
-                Operand nRndMasked = context.AddIntrinsic(Intrinsic.X86Pand, nRnd, nRndMask);
+                Operand nCmp = context.AddIntrinsic(Intrinsic.X86Cmpps, nRes, zero, Const((int)CmpCondition.NotLessThanOrEqual));
+                        nRes = context.AddIntrinsic(Intrinsic.X86Pand,  nRes, nCmp);
 
-                Operand nInt = context.AddIntrinsic(Intrinsic.X86Cvtps2dq, nRndMasked);
+                Operand fpMaxValMask = scalar // 2.14748365E9f (2147483648)
+                    ? X86GetScalar     (context, 0x4F000000)
+                    : X86GetAllElements(context, 0x4F000000);
 
-                Operand mask = X86GetAllElements(context, 0x4F000000); // 2.14748365E9f (2147483648)
+                Operand nInt = context.AddIntrinsic(Intrinsic.X86Cvtps2dq, nRes);
 
-                Operand res = context.AddIntrinsic(Intrinsic.X86Subps, nRndMasked, mask);
+                nRes = context.AddIntrinsic(Intrinsic.X86Subps, nRes, fpMaxValMask);
 
-                Operand mask2 = context.AddIntrinsic(Intrinsic.X86Cmpps, res, context.VectorZero(), Const((int)CmpCondition.NotLessThanOrEqual));
+                nCmp = context.AddIntrinsic(Intrinsic.X86Cmpps, nRes, zero, Const((int)CmpCondition.NotLessThanOrEqual));
+                nRes = context.AddIntrinsic(Intrinsic.X86Pand,  nRes, nCmp);
 
-                Operand resMasked = context.AddIntrinsic(Intrinsic.X86Pand, res, mask2);
+                Operand nInt2 = context.AddIntrinsic(Intrinsic.X86Cvtps2dq, nRes);
 
-                res = context.AddIntrinsic(Intrinsic.X86Cvtps2dq, resMasked);
+                nRes = context.AddIntrinsic(Intrinsic.X86Cmpps, nRes, fpMaxValMask, Const((int)CmpCondition.NotLessThan));
 
-                Operand mask3 = context.AddIntrinsic(Intrinsic.X86Cmpps, resMasked, mask, Const((int)CmpCondition.NotLessThan));
-
-                res = context.AddIntrinsic(Intrinsic.X86Pxor, res, mask3);
-                res = context.AddIntrinsic(Intrinsic.X86Paddd, res, nInt);
+                Operand dRes = context.AddIntrinsic(Intrinsic.X86Pxor,  nInt2, nRes);
+                        dRes = context.AddIntrinsic(Intrinsic.X86Paddd, dRes,  nInt);
 
                 if (scalar)
                 {
-                    res = context.VectorZeroUpper96(res);
+                    dRes = context.VectorZeroUpper96(dRes);
                 }
                 else if (op.RegisterSize == RegisterSize.Simd64)
                 {
-                    res = context.VectorZeroUpper64(res);
+                    dRes = context.VectorZeroUpper64(dRes);
                 }
 
-                context.Copy(GetVec(op.Rd), res);
+                context.Copy(GetVec(op.Rd), dRes);
             }
             else /* if (sizeF == 1) */
             {
-                Operand nMask = context.AddIntrinsic(Intrinsic.X86Cmppd, n, n, Const((int)CmpCondition.OrderedQ));
-
-                Operand nScaled = context.AddIntrinsic(Intrinsic.X86Pand, nMask, n);
+                Operand nRes = context.AddIntrinsic(Intrinsic.X86Cmppd, n, n, Const((int)CmpCondition.OrderedQ));
+                        nRes = context.AddIntrinsic(Intrinsic.X86Pand, nRes, n);
 
                 if (op is OpCodeSimdShImm fixedOp)
                 {
@@ -1003,140 +1226,251 @@ namespace ARMeilleure.Instructions
                     // BitConverter.Int64BitsToDouble(fpScaled) == Math.Pow(2d, fBits)
                     long fpScaled = 0x3FF0000000000000L + fBits * 0x10000000000000L;
 
-                    Operand scale = X86GetAllElements(context, fpScaled);
+                    Operand fpScaledMask = scalar
+                        ? X86GetScalar     (context, fpScaled)
+                        : X86GetAllElements(context, fpScaled);
 
-                    nScaled = context.AddIntrinsic(Intrinsic.X86Mulpd, nScaled, scale);
+                    nRes = context.AddIntrinsic(Intrinsic.X86Mulpd, nRes, fpScaledMask);
                 }
 
-                Operand nRnd = context.AddIntrinsic(Intrinsic.X86Roundpd, nScaled, Const(X86GetRoundControl(roundMode)));
+                nRes = context.AddIntrinsic(Intrinsic.X86Roundpd, nRes, Const(X86GetRoundControl(roundMode)));
+
+                Operand zero = context.VectorZero();
 
-                Operand nRndMask = context.AddIntrinsic(Intrinsic.X86Cmppd, nRnd, context.VectorZero(), Const((int)CmpCondition.NotLessThanOrEqual));
+                Operand nCmp = context.AddIntrinsic(Intrinsic.X86Cmppd, nRes, zero, Const((int)CmpCondition.NotLessThanOrEqual));
+                        nRes = context.AddIntrinsic(Intrinsic.X86Pand,  nRes, nCmp);
 
-                Operand nRndMasked = context.AddIntrinsic(Intrinsic.X86Pand, nRnd, nRndMask);
+                Operand fpMaxValMask = scalar // 9.2233720368547760E18d (9223372036854775808)
+                    ? X86GetScalar     (context, 0x43E0000000000000L)
+                    : X86GetAllElements(context, 0x43E0000000000000L);
 
-                Operand high;
+                Operand nLong = EmitSse2CvtDoubleToInt64OpF(context, nRes, scalar);
 
-                if (!scalar)
+                nRes = context.AddIntrinsic(Intrinsic.X86Subpd, nRes, fpMaxValMask);
+
+                nCmp = context.AddIntrinsic(Intrinsic.X86Cmppd, nRes, zero, Const((int)CmpCondition.NotLessThanOrEqual));
+                nRes = context.AddIntrinsic(Intrinsic.X86Pand,  nRes, nCmp);
+
+                Operand nLong2 = EmitSse2CvtDoubleToInt64OpF(context, nRes, scalar);
+
+                nRes = context.AddIntrinsic(Intrinsic.X86Cmppd, nRes, fpMaxValMask, Const((int)CmpCondition.NotLessThan));
+
+                Operand dRes = context.AddIntrinsic(Intrinsic.X86Pxor,  nLong2, nRes);
+                        dRes = context.AddIntrinsic(Intrinsic.X86Paddq, dRes,   nLong);
+
+                if (scalar)
                 {
-                    high = context.AddIntrinsic(Intrinsic.X86Unpckhpd, nRndMasked, nRndMasked);
-                    high = context.AddIntrinsicLong(Intrinsic.X86Cvtsd2si, high);
+                    dRes = context.VectorZeroUpper64(dRes);
                 }
-                else
+
+                context.Copy(GetVec(op.Rd), dRes);
+            }
+        }
+
+        private static void EmitSse41Fcvts_Gp(ArmEmitterContext context, FPRoundingMode roundMode, bool isFixed)
+        {
+            OpCodeSimdCvt op = (OpCodeSimdCvt)context.CurrOp;
+
+            Operand n = GetVec(op.Rn);
+
+            if (op.Size == 0)
+            {
+                Operand nRes = context.AddIntrinsic(Intrinsic.X86Cmpss, n, n, Const((int)CmpCondition.OrderedQ));
+                        nRes = context.AddIntrinsic(Intrinsic.X86Pand, nRes, n);
+
+                if (isFixed)
                 {
-                    high = Const(0L);
+                    // BitConverter.Int32BitsToSingle(fpScaled) == MathF.Pow(2f, op.FBits)
+                    int fpScaled = 0x3F800000 + op.FBits * 0x800000;
+
+                    Operand fpScaledMask = X86GetScalar(context, fpScaled);
+
+                    nRes = context.AddIntrinsic(Intrinsic.X86Mulss, nRes, fpScaledMask);
                 }
 
-                Operand low = context.AddIntrinsicLong(Intrinsic.X86Cvtsd2si, nRndMasked);
+                nRes = context.AddIntrinsic(Intrinsic.X86Roundss, nRes, Const(X86GetRoundControl(roundMode)));
 
-                Operand nInt = EmitVectorLongCreate(context, low, high);
+                Operand nIntOrLong = op.RegisterSize == RegisterSize.Int32
+                    ? context.AddIntrinsicInt (Intrinsic.X86Cvtss2si, nRes)
+                    : context.AddIntrinsicLong(Intrinsic.X86Cvtss2si, nRes);
 
-                Operand mask = X86GetAllElements(context, 0x43E0000000000000L); // 9.2233720368547760E18d (9223372036854775808)
+                int fpMaxVal = op.RegisterSize == RegisterSize.Int32
+                    ? 0x4F000000  // 2.14748365E9f (2147483648)
+                    : 0x5F000000; // 9.223372E18f  (9223372036854775808)
 
-                Operand res = context.AddIntrinsic(Intrinsic.X86Subpd, nRndMasked, mask);
+                Operand fpMaxValMask = X86GetScalar(context, fpMaxVal);
 
-                Operand mask2 = context.AddIntrinsic(Intrinsic.X86Cmppd, res, context.VectorZero(), Const((int)CmpCondition.NotLessThanOrEqual));
+                nRes = context.AddIntrinsic(Intrinsic.X86Cmpss, nRes, fpMaxValMask, Const((int)CmpCondition.NotLessThan));
 
-                Operand resMasked = context.AddIntrinsic(Intrinsic.X86Pand, res, mask2);
+                Operand nInt = context.AddIntrinsicInt(Intrinsic.X86Cvtsi2si, nRes);
 
-                if (!scalar)
+                if (op.RegisterSize == RegisterSize.Int64)
                 {
-                    high = context.AddIntrinsic(Intrinsic.X86Unpckhpd, resMasked, resMasked);
-                    high = context.AddIntrinsicLong(Intrinsic.X86Cvtsd2si, high);
+                    nInt = context.SignExtend32(OperandType.I64, nInt);
                 }
 
-                low = context.AddIntrinsicLong(Intrinsic.X86Cvtsd2si, resMasked);
+                Operand dRes = context.BitwiseExclusiveOr(nIntOrLong, nInt);
 
-                res = EmitVectorLongCreate(context, low, high);
+                SetIntOrZR(context, op.Rd, dRes);
+            }
+            else /* if (op.Size == 1) */
+            {
+                Operand nRes = context.AddIntrinsic(Intrinsic.X86Cmpsd, n, n, Const((int)CmpCondition.OrderedQ));
+                        nRes = context.AddIntrinsic(Intrinsic.X86Pand, nRes, n);
 
-                Operand mask3 = context.AddIntrinsic(Intrinsic.X86Cmppd, resMasked, mask, Const((int)CmpCondition.NotLessThan));
+                if (isFixed)
+                {
+                    // BitConverter.Int64BitsToDouble(fpScaled) == Math.Pow(2d, op.FBits)
+                    long fpScaled = 0x3FF0000000000000L + op.FBits * 0x10000000000000L;
 
-                res = context.AddIntrinsic(Intrinsic.X86Pxor, res, mask3);
-                res = context.AddIntrinsic(Intrinsic.X86Paddq, res, nInt);
+                    Operand fpScaledMask = X86GetScalar(context, fpScaled);
 
-                if (scalar)
+                    nRes = context.AddIntrinsic(Intrinsic.X86Mulsd, nRes, fpScaledMask);
+                }
+
+                nRes = context.AddIntrinsic(Intrinsic.X86Roundsd, nRes, Const(X86GetRoundControl(roundMode)));
+
+                Operand nIntOrLong = op.RegisterSize == RegisterSize.Int32
+                    ? context.AddIntrinsicInt (Intrinsic.X86Cvtsd2si, nRes)
+                    : context.AddIntrinsicLong(Intrinsic.X86Cvtsd2si, nRes);
+
+                long fpMaxVal = op.RegisterSize == RegisterSize.Int32
+                    ? 0x41E0000000000000L  // 2147483648.0000000d    (2147483648)
+                    : 0x43E0000000000000L; // 9.2233720368547760E18d (9223372036854775808)
+
+                Operand fpMaxValMask = X86GetScalar(context, fpMaxVal);
+
+                nRes = context.AddIntrinsic(Intrinsic.X86Cmpsd, nRes, fpMaxValMask, Const((int)CmpCondition.NotLessThan));
+
+                Operand nLong = context.AddIntrinsicLong(Intrinsic.X86Cvtsi2si, nRes);
+
+                if (op.RegisterSize == RegisterSize.Int32)
                 {
-                    res = context.VectorZeroUpper64(res);
+                    nLong = context.ConvertI64ToI32(nLong);
                 }
 
-                context.Copy(GetVec(op.Rd), res);
+                Operand dRes = context.BitwiseExclusiveOr(nIntOrLong, nLong);
+
+                SetIntOrZR(context, op.Rd, dRes);
             }
         }
 
-        private static void EmitSse2Scvtf(ArmEmitterContext context, bool scalar)
+        private static void EmitSse41Fcvtu_Gp(ArmEmitterContext context, FPRoundingMode roundMode, bool isFixed)
         {
-            OpCodeSimd op = (OpCodeSimd)context.CurrOp;
+            OpCodeSimdCvt op = (OpCodeSimdCvt)context.CurrOp;
 
             Operand n = GetVec(op.Rn);
 
-            Operand res = context.AddIntrinsic(Intrinsic.X86Cvtdq2ps, n);
-
-            if (op is OpCodeSimdShImm fixedOp)
+            if (op.Size == 0)
             {
-                int fBits = GetImmShr(fixedOp);
+                Operand nRes = context.AddIntrinsic(Intrinsic.X86Cmpss, n, n, Const((int)CmpCondition.OrderedQ));
+                        nRes = context.AddIntrinsic(Intrinsic.X86Pand, nRes, n);
 
-                // BitConverter.Int32BitsToSingle(fpScaled) == 1f / MathF.Pow(2f, fBits)
-                int fpScaled = 0x3F800000 - fBits * 0x800000;
+                if (isFixed)
+                {
+                    // BitConverter.Int32BitsToSingle(fpScaled) == MathF.Pow(2f, op.FBits)
+                    int fpScaled = 0x3F800000 + op.FBits * 0x800000;
 
-                Operand scale = X86GetAllElements(context, fpScaled);
+                    Operand fpScaledMask = X86GetScalar(context, fpScaled);
 
-                res = context.AddIntrinsic(Intrinsic.X86Mulps, res, scale);
-            }
+                    nRes = context.AddIntrinsic(Intrinsic.X86Mulss, nRes, fpScaledMask);
+                }
 
-            if (scalar)
-            {
-                res = context.VectorZeroUpper96(res);
+                nRes = context.AddIntrinsic(Intrinsic.X86Roundss, nRes, Const(X86GetRoundControl(roundMode)));
+
+                Operand zero = context.VectorZero();
+
+                Operand nCmp = context.AddIntrinsic(Intrinsic.X86Cmpss, nRes, zero, Const((int)CmpCondition.NotLessThanOrEqual));
+                        nRes = context.AddIntrinsic(Intrinsic.X86Pand,  nRes, nCmp);
+
+                int fpMaxVal = op.RegisterSize == RegisterSize.Int32
+                    ? 0x4F000000  // 2.14748365E9f (2147483648)
+                    : 0x5F000000; // 9.223372E18f  (9223372036854775808)
+
+                Operand fpMaxValMask = X86GetScalar(context, fpMaxVal);
+
+                Operand nIntOrLong = op.RegisterSize == RegisterSize.Int32
+                    ? context.AddIntrinsicInt (Intrinsic.X86Cvtss2si, nRes)
+                    : context.AddIntrinsicLong(Intrinsic.X86Cvtss2si, nRes);
+
+                nRes = context.AddIntrinsic(Intrinsic.X86Subss, nRes, fpMaxValMask);
+
+                nCmp = context.AddIntrinsic(Intrinsic.X86Cmpss, nRes, zero, Const((int)CmpCondition.NotLessThanOrEqual));
+                nRes = context.AddIntrinsic(Intrinsic.X86Pand,  nRes, nCmp);
+
+                Operand nIntOrLong2 = op.RegisterSize == RegisterSize.Int32
+                    ? context.AddIntrinsicInt (Intrinsic.X86Cvtss2si, nRes)
+                    : context.AddIntrinsicLong(Intrinsic.X86Cvtss2si, nRes);
+
+                nRes = context.AddIntrinsic(Intrinsic.X86Cmpss, nRes, fpMaxValMask, Const((int)CmpCondition.NotLessThan));
+
+                Operand nInt = context.AddIntrinsicInt(Intrinsic.X86Cvtsi2si, nRes);
+
+                if (op.RegisterSize == RegisterSize.Int64)
+                {
+                    nInt = context.SignExtend32(OperandType.I64, nInt);
+                }
+
+                Operand dRes = context.BitwiseExclusiveOr(nIntOrLong2, nInt);
+                        dRes = context.Add(dRes, nIntOrLong);
+
+                SetIntOrZR(context, op.Rd, dRes);
             }
-            else if (op.RegisterSize == RegisterSize.Simd64)
+            else /* if (op.Size == 1) */
             {
-                res = context.VectorZeroUpper64(res);
-            }
+                Operand nRes = context.AddIntrinsic(Intrinsic.X86Cmpsd, n, n, Const((int)CmpCondition.OrderedQ));
+                        nRes = context.AddIntrinsic(Intrinsic.X86Pand, nRes, n);
 
-            context.Copy(GetVec(op.Rd), res);
-        }
+                if (isFixed)
+                {
+                    // BitConverter.Int64BitsToDouble(fpScaled) == Math.Pow(2d, op.FBits)
+                    long fpScaled = 0x3FF0000000000000L + op.FBits * 0x10000000000000L;
 
-        private static void EmitSse2Ucvtf(ArmEmitterContext context, bool scalar)
-        {
-            OpCodeSimd op = (OpCodeSimd)context.CurrOp;
+                    Operand fpScaledMask = X86GetScalar(context, fpScaled);
 
-            Operand n = GetVec(op.Rn);
+                    nRes = context.AddIntrinsic(Intrinsic.X86Mulsd, nRes, fpScaledMask);
+                }
 
-            Operand res = context.AddIntrinsic(Intrinsic.X86Psrld, n, Const(16));
+                nRes = context.AddIntrinsic(Intrinsic.X86Roundsd, nRes, Const(X86GetRoundControl(roundMode)));
 
-            res = context.AddIntrinsic(Intrinsic.X86Cvtdq2ps, res);
+                Operand zero = context.VectorZero();
 
-            Operand mask = X86GetAllElements(context, 0x47800000); // 65536.0f (1 << 16)
+                Operand nCmp = context.AddIntrinsic(Intrinsic.X86Cmpsd, nRes, zero, Const((int)CmpCondition.NotLessThanOrEqual));
+                        nRes = context.AddIntrinsic(Intrinsic.X86Pand,  nRes, nCmp);
 
-            res = context.AddIntrinsic(Intrinsic.X86Mulps, res, mask);
+                long fpMaxVal = op.RegisterSize == RegisterSize.Int32
+                    ? 0x41E0000000000000L  // 2147483648.0000000d    (2147483648)
+                    : 0x43E0000000000000L; // 9.2233720368547760E18d (9223372036854775808)
 
-            Operand res2 = context.AddIntrinsic(Intrinsic.X86Pslld, n, Const(16));
+                Operand fpMaxValMask = X86GetScalar(context, fpMaxVal);
 
-            res2 = context.AddIntrinsic(Intrinsic.X86Psrld, res2, Const(16));
-            res2 = context.AddIntrinsic(Intrinsic.X86Cvtdq2ps, res2);
+                Operand nIntOrLong = op.RegisterSize == RegisterSize.Int32
+                    ? context.AddIntrinsicInt (Intrinsic.X86Cvtsd2si, nRes)
+                    : context.AddIntrinsicLong(Intrinsic.X86Cvtsd2si, nRes);
 
-            res = context.AddIntrinsic(Intrinsic.X86Addps, res, res2);
+                nRes = context.AddIntrinsic(Intrinsic.X86Subsd, nRes, fpMaxValMask);
 
-            if (op is OpCodeSimdShImm fixedOp)
-            {
-                int fBits = GetImmShr(fixedOp);
+                nCmp = context.AddIntrinsic(Intrinsic.X86Cmpsd, nRes, zero, Const((int)CmpCondition.NotLessThanOrEqual));
+                nRes = context.AddIntrinsic(Intrinsic.X86Pand,  nRes, nCmp);
 
-                // BitConverter.Int32BitsToSingle(fpScaled) == 1f / MathF.Pow(2f, fBits)
-                int fpScaled = 0x3F800000 - fBits * 0x800000;
+                Operand nIntOrLong2 = op.RegisterSize == RegisterSize.Int32
+                    ? context.AddIntrinsicInt (Intrinsic.X86Cvtsd2si, nRes)
+                    : context.AddIntrinsicLong(Intrinsic.X86Cvtsd2si, nRes);
 
-                Operand scale = X86GetAllElements(context, fpScaled);
+                nRes = context.AddIntrinsic(Intrinsic.X86Cmpsd, nRes, fpMaxValMask, Const((int)CmpCondition.NotLessThan));
 
-                res = context.AddIntrinsic(Intrinsic.X86Mulps, res, scale);
-            }
+                Operand nLong = context.AddIntrinsicLong(Intrinsic.X86Cvtsi2si, nRes);
 
-            if (scalar)
-            {
-                res = context.VectorZeroUpper96(res);
-            }
-            else if (op.RegisterSize == RegisterSize.Simd64)
-            {
-                res = context.VectorZeroUpper64(res);
-            }
+                if (op.RegisterSize == RegisterSize.Int32)
+                {
+                    nLong = context.ConvertI64ToI32(nLong);
+                }
 
-            context.Copy(GetVec(op.Rd), res);
+                Operand dRes = context.BitwiseExclusiveOr(nIntOrLong2, nLong);
+                        dRes = context.Add(dRes, nIntOrLong);
+
+                SetIntOrZR(context, op.Rd, dRes);
+            }
         }
 
         private static Operand EmitVectorLongExtract(ArmEmitterContext context, int reg, int index, int size)
@@ -1145,14 +1479,5 @@ namespace ARMeilleure.Instructions
 
             return context.VectorExtract(type, GetVec(reg), index);
         }
-
-        private static Operand EmitVectorLongCreate(ArmEmitterContext context, Operand low, Operand high)
-        {
-            Operand vector = context.VectorCreateScalar(low);
-
-            vector = context.VectorInsert(vector, high, 1);
-
-            return vector;
-        }
     }
 }

ARMeilleure/Instructions/InstEmitSimdHelper.cs

@@ -16,6 +16,24 @@ namespace ARMeilleure.Instructions
 
     static class InstEmitSimdHelper
     {
+#region "Masks"
+        public static readonly long[] EvenMasks = new long[]
+        {
+            14L << 56 | 12L << 48 | 10L << 40 | 08L << 32 | 06L << 24 | 04L << 16 | 02L << 8 | 00L << 0, // B
+            13L << 56 | 12L << 48 | 09L << 40 | 08L << 32 | 05L << 24 | 04L << 16 | 01L << 8 | 00L << 0, // H
+            11L << 56 | 10L << 48 | 09L << 40 | 08L << 32 | 03L << 24 | 02L << 16 | 01L << 8 | 00L << 0  // S
+        };
+
+        public static readonly long[] OddMasks = new long[]
+        {
+            15L << 56 | 13L << 48 | 11L << 40 | 09L << 32 | 07L << 24 | 05L << 16 | 03L << 8 | 01L << 0, // B
+            15L << 56 | 14L << 48 | 11L << 40 | 10L << 32 | 07L << 24 | 06L << 16 | 03L << 8 | 02L << 0, // H
+            15L << 56 | 14L << 48 | 13L << 40 | 12L << 32 | 07L << 24 | 06L << 16 | 05L << 8 | 04L << 0  // S
+        };
+
+        private static readonly long _zeroMask = 128L << 56 | 128L << 48 | 128L << 40 | 128L << 32 | 128L << 24 | 128L << 16 | 128L << 8 | 128L << 0;
+#endregion
+
 #region "X86 SSE Intrinsics"
         public static readonly Intrinsic[] X86PaddInstruction = new Intrinsic[]
         {
@@ -189,11 +207,19 @@ namespace ARMeilleure.Instructions
             return vector;
         }
 
+        public static Operand X86GetElements(ArmEmitterContext context, long e1, long e0)
+        {
+            Operand vector0 = context.VectorCreateScalar(Const(e0));
+            Operand vector1 = context.VectorCreateScalar(Const(e1));
+
+            return context.AddIntrinsic(Intrinsic.X86Punpcklqdq, vector0, vector1);
+        }
+
         public static int X86GetRoundControl(FPRoundingMode roundMode)
         {
             switch (roundMode)
             {
-                case FPRoundingMode.ToNearest:            return 8 | 0;
+                case FPRoundingMode.ToNearest:            return 8 | 0; // even
                 case FPRoundingMode.TowardsPlusInfinity:  return 8 | 2;
                 case FPRoundingMode.TowardsMinusInfinity: return 8 | 1;
                 case FPRoundingMode.TowardsZero:          return 8 | 3;
@@ -991,6 +1017,46 @@ namespace ARMeilleure.Instructions
             context.Copy(GetVec(op.Rd), res);
         }
 
+        public static void EmitSsse3VectorPairwiseOp(ArmEmitterContext context, Intrinsic[] inst)
+        {
+            OpCodeSimdReg op = (OpCodeSimdReg)context.CurrOp;
+
+            Operand n = GetVec(op.Rn);
+            Operand m = GetVec(op.Rm);
+
+            if (op.RegisterSize == RegisterSize.Simd64)
+            {
+                Operand zeroEvenMask = X86GetElements(context, _zeroMask, EvenMasks[op.Size]);
+                Operand zeroOddMask  = X86GetElements(context, _zeroMask, OddMasks [op.Size]);
+
+                Operand mN = context.AddIntrinsic(Intrinsic.X86Punpcklqdq, n, m); // m:n
+
+                Operand left  = context.AddIntrinsic(Intrinsic.X86Pshufb, mN, zeroEvenMask); // 0:even from m:n
+                Operand right = context.AddIntrinsic(Intrinsic.X86Pshufb, mN, zeroOddMask);  // 0:odd  from m:n
+
+                context.Copy(GetVec(op.Rd), context.AddIntrinsic(inst[op.Size], left, right));
+            }
+            else if (op.Size < 3)
+            {
+                Operand oddEvenMask = X86GetElements(context, OddMasks[op.Size], EvenMasks[op.Size]);
+
+                Operand oddEvenN = context.AddIntrinsic(Intrinsic.X86Pshufb, n, oddEvenMask); // odd:even from n
+                Operand oddEvenM = context.AddIntrinsic(Intrinsic.X86Pshufb, m, oddEvenMask); // odd:even from m
+
+                Operand left  = context.AddIntrinsic(Intrinsic.X86Punpcklqdq, oddEvenN, oddEvenM);
+                Operand right = context.AddIntrinsic(Intrinsic.X86Punpckhqdq, oddEvenN, oddEvenM);
+
+                context.Copy(GetVec(op.Rd), context.AddIntrinsic(inst[op.Size], left, right));
+            }
+            else
+            {
+                Operand left  = context.AddIntrinsic(Intrinsic.X86Punpcklqdq, n, m);
+                Operand right = context.AddIntrinsic(Intrinsic.X86Punpckhqdq, n, m);
+
+                context.Copy(GetVec(op.Rd), context.AddIntrinsic(inst[3], left, right));
+            }
+        }
+
         public static void EmitVectorAcrossVectorOpSx(ArmEmitterContext context, Func2I emit)
         {
             EmitVectorAcrossVectorOp(context, emit, signed: true, isLong: false);
@@ -1066,7 +1132,7 @@ namespace ARMeilleure.Instructions
             context.Copy(GetVec(op.Rd), res);
         }
 
-        public static void EmitVectorPairwiseOpF(ArmEmitterContext context, Intrinsic inst32, Intrinsic inst64)
+        public static void EmitSse2VectorPairwiseOpF(ArmEmitterContext context, Intrinsic inst32, Intrinsic inst64)
         {
             OpCodeSimdReg op = (OpCodeSimdReg)context.CurrOp;
 
@@ -1231,8 +1297,7 @@ namespace ARMeilleure.Instructions
 
                     if (op.Size <= 2)
                     {
-                        Operand temp = add ? context.Add     (ne, me)
-                                           : context.Subtract(ne, me);
+                        Operand temp = add ? context.Add(ne, me) : context.Subtract(ne, me);
 
                         de = EmitSatQ(context, temp, op.Size, signedSrc: true, signedDst: signed);
                     }
@@ -1316,7 +1381,9 @@ namespace ARMeilleure.Instructions
 
             int part = !scalar && (op.RegisterSize == RegisterSize.Simd128) ? elems : 0;
 
-            Operand res = part == 0 ? context.VectorZero() : context.Copy(GetVec(op.Rd));
+            Operand d = GetVec(op.Rd);
+
+            Operand res = part == 0 ? context.VectorZero() : context.Copy(d);
 
             for (int index = 0; index < elems; index++)
             {
@@ -1327,7 +1394,7 @@ namespace ARMeilleure.Instructions
                 res = EmitVectorInsert(context, res, temp, part + index, op.Size);
             }
 
-            context.Copy(GetVec(op.Rd), res);
+            context.Copy(d, res);
         }
 
         // TSrc (16bit, 32bit, 64bit; signed, unsigned) > TDst (8bit, 16bit, 32bit; signed, unsigned).

ARMeilleure/Instructions/InstEmitSimdLogical.cs

@@ -1,6 +1,7 @@
 using ARMeilleure.Decoders;
 using ARMeilleure.IntermediateRepresentation;
 using ARMeilleure.Translation;
+using System.Diagnostics;
 
 using static ARMeilleure.Instructions.InstEmitHelper;
 using static ARMeilleure.Instructions.InstEmitSimdHelper;
@@ -107,7 +108,7 @@ namespace ARMeilleure.Instructions
                     res = context.VectorZeroUpper64(res);
                 }
 
-                context.Copy(GetVec(op.Rd), res);
+                context.Copy(d, res);
             }
             else
             {
@@ -158,7 +159,7 @@ namespace ARMeilleure.Instructions
                     res = context.VectorZeroUpper64(res);
                 }
 
-                context.Copy(GetVec(op.Rd), res);
+                context.Copy(d, res);
             }
             else
             {
@@ -292,11 +293,7 @@ namespace ARMeilleure.Instructions
             {
                 Operand ne = EmitVectorExtractZx(context, op.Rn, index, 0);
 
-                ne = context.ConvertI64ToI32(ne);
-
-                Operand de = context.Call(new _U32_U32(SoftFallback.ReverseBits8), ne);
-
-                de = context.ZeroExtend32(OperandType.I64, de);
+                Operand de = EmitReverseBits8Op(context, ne);
 
                 res = EmitVectorInsert(context, res, de, index, 0);
             }
@@ -304,6 +301,20 @@ namespace ARMeilleure.Instructions
             context.Copy(GetVec(op.Rd), res);
         }
 
+        private static Operand EmitReverseBits8Op(ArmEmitterContext context, Operand op)
+        {
+            Debug.Assert(op.Type == OperandType.I64);
+
+            Operand val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(op, Const(0xaaul)), Const(1)),
+                                            context.ShiftLeft   (context.BitwiseAnd(op, Const(0x55ul)), Const(1)));
+
+            val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(val, Const(0xccul)), Const(2)),
+                                    context.ShiftLeft   (context.BitwiseAnd(val, Const(0x33ul)), Const(2)));
+
+            return context.BitwiseOr(context.ShiftRightUI(val, Const(4)),
+                                     context.ShiftLeft   (context.BitwiseAnd(val, Const(0x0ful)), Const(4)));
+        }
+
         public static void Rev16_V(ArmEmitterContext context)
         {
             if (Optimizations.UseSsse3)

ARMeilleure/Instructions/InstEmitSimdMove.cs

@@ -13,20 +13,6 @@ namespace ARMeilleure.Instructions
     static partial class InstEmit
     {
 #region "Masks"
-        private static readonly long[] _masksE0_TrnUzpXtn = new long[]
-        {
-            14L << 56 | 12L << 48 | 10L << 40 | 08L << 32 | 06L << 24 | 04L << 16 | 02L << 8 | 00L << 0,
-            13L << 56 | 12L << 48 | 09L << 40 | 08L << 32 | 05L << 24 | 04L << 16 | 01L << 8 | 00L << 0,
-            11L << 56 | 10L << 48 | 09L << 40 | 08L << 32 | 03L << 24 | 02L << 16 | 01L << 8 | 00L << 0
-        };
-
-        private static readonly long[] _masksE1_TrnUzp = new long[]
-        {
-            15L << 56 | 13L << 48 | 11L << 40 | 09L << 32 | 07L << 24 | 05L << 16 | 03L << 8 | 01L << 0,
-            15L << 56 | 14L << 48 | 11L << 40 | 10L << 32 | 07L << 24 | 06L << 16 | 03L << 8 | 02L << 0,
-            15L << 56 | 14L << 48 | 13L << 40 | 12L << 32 | 07L << 24 | 06L << 16 | 05L << 8 | 04L << 0
-        };
-
         private static readonly long[] _masksE0_Uzp = new long[]
         {
             13L << 56 | 09L << 48 | 05L << 40 | 01L << 32 | 12L << 24 | 08L << 16 | 04L << 8 | 00L << 0,
@@ -447,7 +433,7 @@ namespace ARMeilleure.Instructions
 
                 Operand res = context.VectorZeroUpper64(d);
 
-                Operand mask = X86GetAllElements(context, _masksE0_TrnUzpXtn[op.Size]);
+                Operand mask = X86GetAllElements(context, EvenMasks[op.Size]);
 
                 Operand res2 = context.AddIntrinsic(Intrinsic.X86Pshufb, GetVec(op.Rn), mask);
 
@@ -646,8 +632,8 @@ namespace ARMeilleure.Instructions
 
                 if (op.Size < 3)
                 {
-                    long maskE0 = _masksE0_TrnUzpXtn[op.Size];
-                    long maskE1 = _masksE1_TrnUzp   [op.Size];
+                    long maskE0 = EvenMasks[op.Size];
+                    long maskE1 = OddMasks [op.Size];
 
                     mask = X86GetScalar(context, maskE0);
 
@@ -714,8 +700,8 @@ namespace ARMeilleure.Instructions
 
                     if (op.Size < 3)
                     {
-                        long maskE0 = _masksE0_TrnUzpXtn[op.Size];
-                        long maskE1 = _masksE1_TrnUzp   [op.Size];
+                        long maskE0 = EvenMasks[op.Size];
+                        long maskE1 = OddMasks [op.Size];
 
                         mask = X86GetScalar(context, maskE0);
 

ARMeilleure/Instructions/InstEmitSimdShift.cs

@@ -4,6 +4,7 @@ using ARMeilleure.Decoders;
 using ARMeilleure.IntermediateRepresentation;
 using ARMeilleure.Translation;
 using System;
+using System.Diagnostics;
 
 using static ARMeilleure.Instructions.InstEmitHelper;
 using static ARMeilleure.Instructions.InstEmitSimdHelper;
@@ -16,13 +17,6 @@ namespace ARMeilleure.Instructions
     static partial class InstEmit
     {
 #region "Masks"
-        private static readonly long[] _masks_RshrnShrn = new long[]
-        {
-            14L << 56 | 12L << 48 | 10L << 40 | 08L << 32 | 06L << 24 | 04L << 16 | 02L << 8 | 00L << 0,
-            13L << 56 | 12L << 48 | 09L << 40 | 08L << 32 | 05L << 24 | 04L << 16 | 01L << 8 | 00L << 0,
-            11L << 56 | 10L << 48 | 09L << 40 | 08L << 32 | 03L << 24 | 02L << 16 | 01L << 8 | 00L << 0
-        };
-
         private static readonly long[] _masks_SliSri = new long[] // Replication masks.
         {
             0x0101010101010101L, 0x0001000100010001L, 0x0000000100000001L, 0x0000000000000001L
@@ -42,7 +36,7 @@ namespace ARMeilleure.Instructions
                 Operand d = GetVec(op.Rd);
                 Operand n = GetVec(op.Rn);
 
-                Operand dLow = context.AddIntrinsic(Intrinsic.X86Movlhps, d, context.VectorZero());
+                Operand dLow = context.VectorZeroUpper64(d);
 
                 Operand mask = null;
 
@@ -61,7 +55,7 @@ namespace ARMeilleure.Instructions
 
                 res = context.AddIntrinsic(srlInst, res, Const(shift));
 
-                Operand mask2 = X86GetAllElements(context, _masks_RshrnShrn[op.Size]);
+                Operand mask2 = X86GetAllElements(context, EvenMasks[op.Size]);
 
                 res = context.AddIntrinsic(Intrinsic.X86Pshufb, res, mask2);
 
@@ -157,13 +151,13 @@ namespace ARMeilleure.Instructions
                 Operand d = GetVec(op.Rd);
                 Operand n = GetVec(op.Rn);
 
-                Operand dLow = context.AddIntrinsic(Intrinsic.X86Movlhps, d, context.VectorZero());
+                Operand dLow = context.VectorZeroUpper64(d);
 
                 Intrinsic srlInst = X86PsrlInstruction[op.Size + 1];
 
                 Operand nShifted = context.AddIntrinsic(srlInst, n, Const(shift));
 
-                Operand mask = X86GetAllElements(context, _masks_RshrnShrn[op.Size]);
+                Operand mask = X86GetAllElements(context, EvenMasks[op.Size]);
 
                 Operand res = context.AddIntrinsic(Intrinsic.X86Pshufb, nShifted, mask);
 
@@ -702,9 +696,9 @@ namespace ARMeilleure.Instructions
             for (int index = 0; index < elems; index++)
             {
                 Operand ne = EmitVectorExtractZx(context, op.Rn, index, op.Size);
-                Operand me = EmitVectorExtractZx(context, op.Rm, index, op.Size);
+                Operand me = EmitVectorExtractSx(context, op.Rm, index << op.Size, 0);
 
-                Operand e = context.Call(new _U64_U64_U64_Bool_S32(SoftFallback.UnsignedShlReg), ne, me, Const(0), Const(op.Size));
+                Operand e = EmitUnsignedShlRegOp(context, ne, context.ConvertI64ToI32(me), op.Size);
 
                 res = EmitVectorInsert(context, res, e, index, op.Size);
             }
@@ -879,9 +873,7 @@ namespace ARMeilleure.Instructions
                         e = context.Add(e, Const(roundConst));
                     }
 
-                    e = signed
-                        ? context.ShiftRightSI(e, Const(shift))
-                        : context.ShiftRightUI(e, Const(shift));
+                    e = signed ? context.ShiftRightSI(e, Const(shift)) : context.ShiftRightUI(e, Const(shift));
                 }
                 else /* if (op.Size == 3) */
                 {
@@ -901,6 +893,28 @@ namespace ARMeilleure.Instructions
             context.Copy(GetVec(op.Rd), res);
         }
 
+        private static Operand EmitUnsignedShlRegOp(ArmEmitterContext context, Operand op, Operand shiftLsB, int size)
+        {
+            Debug.Assert(op.Type       == OperandType.I64);
+            Debug.Assert(shiftLsB.Type == OperandType.I32);
+            Debug.Assert((uint)size < 4u);
+
+            Operand negShiftLsB = context.Negate(shiftLsB);
+
+            Operand isPositive = context.ICompareGreaterOrEqual(shiftLsB, Const(0));
+
+            Operand shl = context.ShiftLeft   (op, shiftLsB);
+            Operand shr = context.ShiftRightUI(op, negShiftLsB);
+
+            Operand res = context.ConditionalSelect(isPositive, shl, shr);
+
+            Operand isOutOfRange = context.BitwiseOr(
+                context.ICompareGreaterOrEqual(shiftLsB,    Const(8 << size)),
+                context.ICompareGreaterOrEqual(negShiftLsB, Const(8 << size)));
+
+            return context.ConditionalSelect(isOutOfRange, Const(0UL), res);
+        }
+
         private static void EmitVectorShrImmNarrowOpZx(ArmEmitterContext context, bool round)
         {
             OpCodeSimdShImm op = (OpCodeSimdShImm)context.CurrOp;
@@ -913,7 +927,9 @@ namespace ARMeilleure.Instructions
 
             int part = op.RegisterSize == RegisterSize.Simd128 ? elems : 0;
 
-            Operand res = part == 0 ? context.VectorZero() : context.Copy(GetVec(op.Rd));
+            Operand d = GetVec(op.Rd);
+
+            Operand res = part == 0 ? context.VectorZero() : context.Copy(d);
 
             for (int index = 0; index < elems; index++)
             {
@@ -929,7 +945,7 @@ namespace ARMeilleure.Instructions
                 res = EmitVectorInsert(context, res, e, part + index, op.Size);
             }
 
-            context.Copy(GetVec(op.Rd), res);
+            context.Copy(d, res);
         }
 
         [Flags]
@@ -972,7 +988,9 @@ namespace ARMeilleure.Instructions
 
             int part = !scalar && (op.RegisterSize == RegisterSize.Simd128) ? elems : 0;
 
-            Operand res = part == 0 ? context.VectorZero() : context.Copy(GetVec(op.Rd));
+            Operand d = GetVec(op.Rd);
+
+            Operand res = part == 0 ? context.VectorZero() : context.Copy(d);
 
             for (int index = 0; index < elems; index++)
             {
@@ -985,9 +1003,7 @@ namespace ARMeilleure.Instructions
                         e = context.Add(e, Const(roundConst));
                     }
 
-                    e = signedSrc
-                        ? context.ShiftRightSI(e, Const(shift))
-                        : context.ShiftRightUI(e, Const(shift));
+                    e = signedSrc ? context.ShiftRightSI(e, Const(shift)) : context.ShiftRightUI(e, Const(shift));
                 }
                 else /* if (op.Size == 2 && round) */
                 {
@@ -999,7 +1015,7 @@ namespace ARMeilleure.Instructions
                 res = EmitVectorInsert(context, res, e, part + index, op.Size);
             }
 
-            context.Copy(GetVec(op.Rd), res);
+            context.Copy(d, res);
         }
 
         // dst64 = (Int(src64, signed) + roundConst) >> shift;

ARMeilleure/Instructions/SoftFallback.cs

@@ -1240,74 +1240,5 @@ namespace ARMeilleure.Instructions
                 : (uint)(value >> 32);
         }
 #endregion
-
-#region "Reverse"
-        public static uint ReverseBits8(uint value)
-        {
-            value = ((value & 0xaa) >> 1) | ((value & 0x55) << 1);
-            value = ((value & 0xcc) >> 2) | ((value & 0x33) << 2);
-
-            return (value >> 4) | ((value & 0x0f) << 4);
-        }
-
-        public static uint ReverseBits32(uint value)
-        {
-            value = ((value & 0xaaaaaaaa) >> 1) | ((value & 0x55555555) << 1);
-            value = ((value & 0xcccccccc) >> 2) | ((value & 0x33333333) << 2);
-            value = ((value & 0xf0f0f0f0) >> 4) | ((value & 0x0f0f0f0f) << 4);
-            value = ((value & 0xff00ff00) >> 8) | ((value & 0x00ff00ff) << 8);
-
-            return (value >> 16) | (value << 16);
-        }
-
-        public static ulong ReverseBits64(ulong value)
-        {
-            value = ((value & 0xaaaaaaaaaaaaaaaa) >> 1 ) | ((value & 0x5555555555555555) << 1 );
-            value = ((value & 0xcccccccccccccccc) >> 2 ) | ((value & 0x3333333333333333) << 2 );
-            value = ((value & 0xf0f0f0f0f0f0f0f0) >> 4 ) | ((value & 0x0f0f0f0f0f0f0f0f) << 4 );
-            value = ((value & 0xff00ff00ff00ff00) >> 8 ) | ((value & 0x00ff00ff00ff00ff) << 8 );
-            value = ((value & 0xffff0000ffff0000) >> 16) | ((value & 0x0000ffff0000ffff) << 16);
-
-            return (value >> 32) | (value << 32);
-        }
-
-        public static uint ReverseBytes16_32(uint value) => (uint)ReverseBytes16_64(value);
-
-        public static ulong ReverseBytes16_64(ulong value) => ReverseBytes(value, RevSize.Rev16);
-        public static ulong ReverseBytes32_64(ulong value) => ReverseBytes(value, RevSize.Rev32);
-
-        private enum RevSize
-        {
-            Rev16,
-            Rev32,
-            Rev64
-        }
-
-        private static ulong ReverseBytes(ulong value, RevSize size)
-        {
-            value = ((value & 0xff00ff00ff00ff00) >> 8) | ((value & 0x00ff00ff00ff00ff) << 8);
-
-            if (size == RevSize.Rev16)
-            {
-                return value;
-            }
-
-            value = ((value & 0xffff0000ffff0000) >> 16) | ((value & 0x0000ffff0000ffff) << 16);
-
-            if (size == RevSize.Rev32)
-            {
-                return value;
-            }
-
-            value = ((value & 0xffffffff00000000) >> 32) | ((value & 0x00000000ffffffff) << 32);
-
-            if (size == RevSize.Rev64)
-            {
-                return value;
-            }
-
-            throw new ArgumentException(nameof(size));
-        }
-#endregion
     }
 }

ARMeilleure/IntermediateRepresentation/Intrinsic.cs

@@ -30,8 +30,11 @@ namespace ARMeilleure.IntermediateRepresentation
         X86Cvtps2pd,
         X86Cvtsd2si,
         X86Cvtsd2ss,
+        X86Cvtsi2sd,
         X86Cvtsi2si,
+        X86Cvtsi2ss,
         X86Cvtss2sd,
+        X86Cvtss2si,
         X86Divpd,
         X86Divps,
         X86Divsd,

Ryujinx.Tests/Cpu/CpuTestSimd.cs

@@ -2856,7 +2856,7 @@ namespace Ryujinx.Tests.Cpu
 
             SingleOpcode(opcodes, v0: v0, v1: v1);
 
-            CompareAgainstUnicorn(fpTolerances: FpTolerances.UpToOneUlpsD); // unsigned
+            CompareAgainstUnicorn();
         }
 
         [Test, Pairwise] [Explicit]
@@ -2892,7 +2892,7 @@ namespace Ryujinx.Tests.Cpu
 
             SingleOpcode(opcodes, v0: v0, v1: v1);
 
-            CompareAgainstUnicorn(fpTolerances: FpTolerances.UpToOneUlpsD); // unsigned
+            CompareAgainstUnicorn();
         }
 
         [Test, Pairwise]

Ryujinx.Tests/Cpu/CpuTestSimdCvt.cs

@@ -582,7 +582,7 @@ namespace Ryujinx.Tests.Cpu
 
             SingleOpcode(opcodes, x1: xn, x31: x31, v0: v0);
 
-            CompareAgainstUnicorn(fpTolerances: FpTolerances.UpToOneUlpsD); // unsigned
+            CompareAgainstUnicorn();
         }
 
         [Test, Pairwise] [Explicit]
@@ -666,7 +666,7 @@ namespace Ryujinx.Tests.Cpu
 
             SingleOpcode(opcodes, x1: xn, x31: x31, v0: v0);
 
-            CompareAgainstUnicorn(fpTolerances: FpTolerances.UpToOneUlpsD); // unsigned
+            CompareAgainstUnicorn();
         }
 #endif
     }

Ryujinx.Tests/Cpu/CpuTestSimdShImm.cs

@@ -564,7 +564,7 @@ namespace Ryujinx.Tests.Cpu
 
             SingleOpcode(opcodes, v0: v0, v1: v1);
 
-            CompareAgainstUnicorn(fpTolerances: FpTolerances.UpToOneUlpsD); // unsigned
+            CompareAgainstUnicorn();
         }
 
         [Test, Pairwise]