enmergent commit on 20230213 by nitload youmu, recovery of math functions

源代码/.Net/StgSharp/Math/ACos.cs

@@ -2,9 +2,9 @@
 using System.Collections.Generic;
 using System.Text;
 
-namespace StgSharp.Math
+namespace StgSharp
 {
-    public static unsafe partial class Calc
+    public static unsafe partial class Math
     {
 
 

源代码/.Net/StgSharp/Math/ASin.cs

@@ -1,4 +1,6 @@
-// some of the code is rewritten from the AMD code:
+//
+// 
+// some of the code is rewritten from the AMD code:
 // https://github.com/amd/aocl-libm-ose/blob/a43e092b03213eb0e129a1cc129900e6e4475778/src/ref/asinf.c
 
 
@@ -7,9 +9,9 @@ using System.Collections.Generic;
 using System.Text;
 
 
-namespace StgSharp.Math
+namespace StgSharp
 {
-    public static unsafe partial class Calc
+    public static unsafe partial class Math
     {
 
         private const float

源代码/.Net/StgSharp/Math/ATan.cs

@@ -0,0 +1,85 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace StgSharp
+{
+    public static unsafe partial class Math
+    {
+        public static unsafe float ATan(float x)
+        {
+            float sign = 1, angle = 0;
+            if (x < 0)
+            {
+                sign = -1;
+                x = -x;
+            }
+            uint xBit = *(uint*)&x;
+            int xExp = (int)(xBit >> 23) - 127;
+            if (xExp >= 26)
+            {
+                return 1;
+            }
+            if (xExp <= -15)
+            {
+                return x;
+            }
+            if (xExp >= 0)
+            {
+                x = (x - 1) / (x + 1);
+                angle = 0.7853981634f;
+            }
+
+            float v = 0.7853981634f * x + x * (1 - x) * (0.2447f+0.0663f * x);
+            v += angle;
+            v *= sign;
+
+            return v;
+
+
+        }
+
+
+        public static unsafe float ATan(float x, float y)
+        {
+
+
+            float z = y / x;
+
+            float sign = 1, angle = 0,angle2 = 0;
+            if (x<0)
+            {
+                angle = -3.1415926535f ;
+            }
+            if (z < 0)
+            {
+                sign = -1;
+                z = -z;
+            }
+            uint zBit = *(uint*)&z;
+            int zExp = (int)(zBit >> 23) - 127;
+            if (zExp >= 26)
+            {
+                return 1;
+            }
+            if (zExp <= -15)
+            {
+                return z;
+            }
+            if (zExp >= 0)
+            {
+                z = (z - 1) / (z + 1);
+                angle2 = 0.7853981634f;
+            }
+
+            float v = 0.7853981634f * z + z * (1 - z) * (0.2447f + 0.0663f * z);
+            v *= 57.29577951f;
+            v += angle2;
+            v += angle;
+            v *= sign;
+
+            return v;
+
+        }
+    }
+}

源代码/.Net/StgSharp/Math/Cos.cs

@@ -2,9 +2,9 @@
 using System.Collections.Generic;
 using System.Text;
 
-namespace StgSharp.Math
+namespace StgSharp
 {
-    public static partial class Calc
+    public static partial class Math
     {
 
         public static float Cos(float x)

源代码/.Net/StgSharp/Math/Exp.cs

@@ -2,9 +2,9 @@
 using System.Collections.Generic;
 using System.Text;
 
-namespace StgSharp.Math
+namespace StgSharp
 {
-    public static unsafe partial class Calc
+    public static unsafe partial class Math
     {
 
         public const float E = 2.718281828f;

源代码/.Net/StgSharp/Math/GetBits32.cs

@@ -2,9 +2,11 @@
 using System.Collections.Generic;
 using System.Text;
 
-namespace StgSharp.Math
+namespace StgSharp
 {
-    public static unsafe partial class Calc
+
+
+    public static unsafe partial class Math
     {
 
         /// <summary>

源代码/.Net/StgSharp/Math/Log.cs

@@ -4,9 +4,12 @@ using System.Net.Sockets;
 using System.Text;
 using static System.Net.WebRequestMethods;
 
-namespace StgSharp.Math
+namespace StgSharp
 {
-    public static partial class Calc
+
+
+
+    public static partial class Math
     {
 
         static private readonly float[] logArray =

源代码/.Net/StgSharp/Math/Pow.cs

@@ -2,9 +2,9 @@
 using System.Collections.Generic;
 using System.Text;
 
-namespace StgSharp.Math
+namespace StgSharp
 { 
-    public static unsafe partial class Calc
+    public static unsafe partial class Math
     {
         /// <summary>
         /// calculate the value of x^y
@@ -35,7 +35,7 @@ namespace StgSharp.Math
             {
                 return 1.0f / 0;
             }
-            z = StgSharp.Math.Calc.Log(x) * y;
+            z = StgSharp.Math.Log(x) * y;
 
             bool sign = false;
             if (z < 0)

源代码/.Net/StgSharp/Math/Sin.cs

@@ -2,9 +2,9 @@
 using System.Collections.Generic;
 using System.Text;
 
-namespace StgSharp.Math
+namespace StgSharp
 {
-    public static partial class Calc
+    public static partial class Math
     {
         private static readonly float[] sinData =
             {

源代码/.Net/StgSharp/Math/Sqrt.cs

@@ -3,9 +3,9 @@ using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
 using System.Text;
 
-namespace StgSharp.Math
+namespace StgSharp
 {
-    public static partial class Clac
+    public static partial class Math
     {
         /*本方法将小数部分统一提升至2^16处后进行线性近似
         const uint sqmov = 0b_0100_0111_1000_0000_0000_0000_0000_0000;

源代码/.Net/StgSharp/Math/Tan.cs

@@ -2,9 +2,9 @@
 using System.Collections.Generic;
 using System.Text;
 
-namespace StgSharp.Math
+namespace StgSharp
 {
-    public static partial class Calc
+    public static partial class Math
     {
 
         public static float Tan(float x)