From 7ac5f40532e4bd96641867035dfda86d2a9d7260 Mon Sep 17 00:00:00 2001
From: gdkchan <gab.dark.100@gmail.com>
Date: Fri, 18 May 2018 14:44:49 -0300
Subject: [PATCH] Add scalar variants of FCVTZS/FCVTZU, fix a issue on
 Ryushader

---
 ChocolArm64/AOpCodeTable.cs                 |  2 +
 ChocolArm64/Instruction/AInstEmitSimdCvt.cs | 54 +++++++++++++++++++++
 Ryushader/Program.cs                        |  2 +-
 3 files changed, 57 insertions(+), 1 deletion(-)

diff --git a/ChocolArm64/AOpCodeTable.cs b/ChocolArm64/AOpCodeTable.cs
index 64b7e10f..754c8abc 100644
--- a/ChocolArm64/AOpCodeTable.cs
+++ b/ChocolArm64/AOpCodeTable.cs
@@ -231,10 +231,12 @@ namespace ChocolArm64
             Set("x00111100x101001000000xxxxxxxxxx", AInstEmit.Fcvtpu_Gp,     typeof(AOpCodeSimdCvt));
             Set("x00111100x111000000000xxxxxxxxxx", AInstEmit.Fcvtzs_Gp,     typeof(AOpCodeSimdCvt));
             Set("x00111100x011000xxxxxxxxxxxxxxxx", AInstEmit.Fcvtzs_Gp_Fix, typeof(AOpCodeSimdCvt));
+            Set("010111101x100001101110xxxxxxxxxx", AInstEmit.Fcvtzs_S,      typeof(AOpCodeSimd));
             Set("0>0011101<100001101110xxxxxxxxxx", AInstEmit.Fcvtzs_V,      typeof(AOpCodeSimd));
             Set("0x0011110>>xxxxx111111xxxxxxxxxx", AInstEmit.Fcvtzs_V,      typeof(AOpCodeSimdShImm));
             Set("x00111100x111001000000xxxxxxxxxx", AInstEmit.Fcvtzu_Gp,     typeof(AOpCodeSimdCvt));
             Set("x00111100x011001xxxxxxxxxxxxxxxx", AInstEmit.Fcvtzu_Gp_Fix, typeof(AOpCodeSimdCvt));
+            Set("011111101x100001101110xxxxxxxxxx", AInstEmit.Fcvtzu_S,      typeof(AOpCodeSimd));
             Set("0>1011101<100001101110xxxxxxxxxx", AInstEmit.Fcvtzu_V,      typeof(AOpCodeSimd));
             Set("0x1011110>>xxxxx111111xxxxxxxxxx", AInstEmit.Fcvtzu_V,      typeof(AOpCodeSimdShImm));
             Set("000111100x1xxxxx000110xxxxxxxxxx", AInstEmit.Fdiv_S,        typeof(AOpCodeSimdReg));
diff --git a/ChocolArm64/Instruction/AInstEmitSimdCvt.cs b/ChocolArm64/Instruction/AInstEmitSimdCvt.cs
index 444638e6..98bb972a 100644
--- a/ChocolArm64/Instruction/AInstEmitSimdCvt.cs
+++ b/ChocolArm64/Instruction/AInstEmitSimdCvt.cs
@@ -126,6 +126,11 @@ namespace ChocolArm64.Instruction
             EmitFcvtzs_Gp_Fix(Context);
         }
 
+        public static void Fcvtzs_S(AILEmitterCtx Context)
+        {
+            EmitScalarFcvtzs(Context);
+        }
+
         public static void Fcvtzs_V(AILEmitterCtx Context)
         {
             EmitVectorFcvtzs(Context);
@@ -141,6 +146,11 @@ namespace ChocolArm64.Instruction
             EmitFcvtzu_Gp_Fix(Context);
         }
 
+        public static void Fcvtzu_S(AILEmitterCtx Context)
+        {
+            EmitScalarFcvtzu(Context);
+        }
+
         public static void Fcvtzu_V(AILEmitterCtx Context)
         {
             EmitVectorFcvtzu(Context);
@@ -353,6 +363,50 @@ namespace ChocolArm64.Instruction
             }
         }
 
+        private static void EmitScalarFcvtzs(AILEmitterCtx Context)
+        {
+            EmitScalarFcvtz(Context, true);
+        }
+
+        private static void EmitScalarFcvtzu(AILEmitterCtx Context)
+        {
+            EmitScalarFcvtz(Context, false);
+        }
+
+        private static void EmitScalarFcvtz(AILEmitterCtx Context, bool Signed)
+        {
+            AOpCodeSimd Op = (AOpCodeSimd)Context.CurrOp;
+
+            int SizeF = Op.Size & 1;
+            int SizeI = SizeF + 2;
+
+            int FBits = GetFBits(Context);
+
+            EmitVectorExtractF(Context, Op.Rn, 0, SizeF);
+
+            EmitF2iFBitsMul(Context, SizeF, FBits);
+
+            if (SizeF == 0)
+            {
+                AVectorHelper.EmitCall(Context, Signed
+                    ? nameof(AVectorHelper.SatF32ToS32)
+                    : nameof(AVectorHelper.SatF32ToU32));
+            }
+            else /* if (SizeF == 1) */
+            {
+                AVectorHelper.EmitCall(Context, Signed
+                    ? nameof(AVectorHelper.SatF64ToS64)
+                    : nameof(AVectorHelper.SatF64ToU64));
+            }
+
+            if (SizeF == 0)
+            {
+                Context.Emit(OpCodes.Conv_U8);
+            }
+
+            EmitScalarSet(Context, Op.Rd, SizeI);
+        }
+
         private static void EmitVectorFcvtzs(AILEmitterCtx Context)
         {
             EmitVectorFcvtz(Context, true);
diff --git a/Ryushader/Program.cs b/Ryushader/Program.cs
index 21eb3d79..6fec744d 100644
--- a/Ryushader/Program.cs
+++ b/Ryushader/Program.cs
@@ -28,7 +28,7 @@ namespace Ryushader
 
                 int[] Code = new int[Data.Length / 4];
 
-                for (int Offset = 0; Offset < Data.Length; Offset += 4)
+                for (int Offset = 0; Offset + 4 <= Data.Length; Offset += 4)
                 {
                     int Value = BitConverter.ToInt32(Data, Offset);