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few optimisations

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This commit is contained in:
smremde_cp 2011-01-06 18:11:15 +00:00
parent ede6b418c5
commit c66d8bca19
2 changed files with 23 additions and 28 deletions
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11
source2/Kernel/System/Cosmos.System.Plugs.System/Int32Impl.cs
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@ -16,12 +16,15 @@ namespace Cosmos.System.Plugs.System {
//at Cosmos.Build.MSBuild.IL2CPU.Execute() in M:\source\Cosmos\source2\Build\Cosmos.Build.MSBuild\IL2CPU.cs:line 250 C:\Program Files (x86)\MSBuild\Cosmos\Cosmos.targets 32 10 Guess (source2\Demos\Guess\Guess) //at Cosmos.Build.MSBuild.IL2CPU.Execute() in M:\source\Cosmos\source2\Build\Cosmos.Build.MSBuild\IL2CPU.cs:line 250 C:\Program Files (x86)\MSBuild\Cosmos\Cosmos.targets 32 10 Guess (source2\Demos\Guess\Guess)
// for instance ones still declare as static but add a aThis argument first of same type as target // for instance ones still declare as static but add a aThis argument first of same type as target
public static int Parse(string s) { public static int Parse(string s)
{
int xResult = 0; int xResult = 0;
for (int i = s.Length - 1; i >= 0; i--) { for (int i = s.Length - 1; i >= 0; i--)
{
xResult = xResult * 10; xResult = xResult * 10;
int j = Digits.IndexOf(s[i]); int j = s[i] - '0';
if (j == -1) { if (j < 0 || j > 9)
{
throw new Exception("Non numeric digit found in int.parse"); throw new Exception("Non numeric digit found in int.parse");
} }
xResult = xResult + j; xResult = xResult + j;

32
source2/Kernel/System/Cosmos.System.Plugs.System/MathImpl.cs
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@ -14,16 +14,11 @@ namespace Cosmos.System.Plugs.System
public static double Abs(double value) public static double Abs(double value)
{ {
double xResult;
if (value < 0) if (value < 0)
{ return -value;
xResult = value - (2 * value);
}
else else
{ return value;
xResult = value;
}
return xResult;
} }
//public static float Abs(float value) //public static float Abs(float value)
@ -56,37 +51,34 @@ namespace Cosmos.System.Plugs.System
public static int Abs(int value) public static int Abs(int value)
{ {
int xResult;
if (value < 0) if (value < 0)
{ return -value;
xResult = value - (2 * value);
}
else else
{ return value;
xResult = value;
}
return xResult;
} }
public static double Pow(double x, double y) public static double Pow(double x, double y)
{ {
double xResult = x;
if (y == 0) if (y == 0)
{ {
xResult = 1; return 1;
} }
else if (y == 1) else if (y == 1)
{ {
xResult = x; return x;
} }
else else
{ {
double xResult = x;
for (int i = 2; i <= y; i++) for (int i = 2; i <= y; i++)
{ {
xResult = xResult * x; xResult = xResult * x;
} }
return xResult;
} }
return xResult;
} }
} }
} }