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daily update on 2024.03.18 by itload youmu

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This commit is contained in:
YoumuLiu
2024-03-19 02:41:04 +08:00
parent 15bf989285
commit 0c50c6282e
200 changed files with 7663 additions and 3455 deletions
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源代码/StgSharp/Math/Scalar/Exp.cs
+47 -15
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@@ -1,9 +1,40 @@
namespace StgSharp.Math
//-----------------------------------------------------------------------
//-----------------------------------------------------------------------
// file="Exp.cs"
// Project: StgSharp
// AuthorGroup: Nitload Space
// Copyright (c) Nitload Space. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the “Software”), to deal in the Software without restriction,
// including without limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of the Software,
// and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
//
// The above copyright notice and
// this permission notice shall be included in all copies
// or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED “AS IS”,
// WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH
// THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
//-----------------------------------------------------------------------
//-----------------------------------------------------------------------
namespace StgSharp.Math
{
public static unsafe partial class Scaler
{
public const float E = 2.718281828f;
/// <summary>
/// Get the value of E ^ x;
/// </summary>
@@ -30,12 +61,12 @@
float z = x, t;
if (x < 0.5f)
{
t = 1.0f + x * (
1.0f + x * (
0.5f + x * (
0.1666666667f + x * (
0.0416666666667f + x *
8.333333333e-3f))));
t = 1.0f + (x * (
1.0f + (x * (
0.5f + (x * (
0.1666666667f + (x * (
0.0416666666667f + (x *
8.333333333e-3f)))))))));
}
else
{
@@ -45,20 +76,20 @@
*/
uint zBit = *(uint*)&z;
uint zBitAbs = zBit & 0b_0111_1111_1111_1111_1111_1111_1111_1111;
uint uintm = (zBitAbs >> 23);
uint uintm = zBitAbs >> 23;
int m = (*(int*)&uintm) - 126;
uint nBit = (zBitAbs & 0b_0000_0000_0111_1111_1111_1111_1111_1111)
+ 0b_0011_1111_0000_0000_0000_0000_0000_0000;
float n = *(float*)&nBit - 1;
float n = (*(float*)&nBit) - 1;
t = 2.718281828f + n * (
2.718281828f + n * (
1.359140914f + n * (
0.4530469714f + n * (
0.1132617429f + n *
0.02265234857f))));
t = 2.718281828f + (n * (
2.718281828f + (n * (
1.359140914f + (n * (
0.4530469714f + (n * (
0.1132617429f + (n *
0.02265234857f)))))))));
for (int i = 0; i < m; i++)
{
@@ -72,5 +103,6 @@
}
return t;
}
}
}