JinxRyu/ChocolArm64/ABitUtils.cs

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2018-02-04 23:08:20 +00:00
namespace ChocolArm64
{
static class ABitUtils
{
public static int CountBitsSet(long Value)
{
int Count = 0;
for (int Bit = 0; Bit < 64; Bit++)
{
Count += (int)(Value >> Bit) & 1;
}
return Count;
}
public static int HighestBitSet32(int Value)
{
for (int Bit = 31; Bit >= 0; Bit--)
{
if (((Value >> Bit) & 1) != 0)
{
return Bit;
}
}
return -1;
}
public static long Replicate(long Bits, int Size)
{
long Output = 0;
for (int Bit = 0; Bit < 64; Bit += Size)
{
Output |= Bits << Bit;
}
return Output;
}
public static long FillWithOnes(int Bits)
{
return Bits == 64 ? -1L : (1L << Bits) - 1;
}
public static long RotateRight(long Bits, int Shift, int Size)
{
return (Bits >> Shift) | (Bits << (Size - Shift));
}
public static bool IsPow2(int Value)
{
return Value != 0 && (Value & (Value - 1)) == 0;
}
}
}