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Use BitOperations methods and delete now unused BitUtils methods (#3134)

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Replaces BitUtils.CountTrailingZeros/CountLeadingZeros/IsPowerOfTwo with BitOperations methods
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Berkan Diler 2022-02-18 02:35:23 +01:00 • committed by GitHub
parent 63c9c64196
commit 98c838b24c
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6 changed files with 19 additions and 68 deletions
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58
Ryujinx.Common/Utilities/BitUtils.cs
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@ -1,11 +1,10 @@
using System;
using System.Numerics;
namespace Ryujinx.Common
{
public static class BitUtils
{
private static ReadOnlySpan<byte> ClzNibbleTbl => new byte[] { 4, 3, 2, 2, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0 };
public static uint AlignUp(uint value, int size)
{
return (uint)AlignUp((int)value, size);
@ -76,60 +75,7 @@ namespace Ryujinx.Common
public static int Pow2RoundDown(int value)
{
return IsPowerOfTwo32(value) ? value : Pow2RoundUp(value) >> 1;
}
public static bool IsPowerOfTwo32(int value)
{
return value != 0 && (value & (value - 1)) == 0;
}
public static bool IsPowerOfTwo64(long value)
{
return value != 0 && (value & (value - 1)) == 0;
}
public static int CountLeadingZeros32(int value)
{
return (int)CountLeadingZeros((ulong)value, 32);
}
public static int CountLeadingZeros64(long value)
{
return (int)CountLeadingZeros((ulong)value, 64);
}
private static ulong CountLeadingZeros(ulong value, int size)
{
if (value == 0ul)
{
return (ulong)size;
}
int nibbleIdx = size;
int preCount, count = 0;
do
{
nibbleIdx -= 4;
preCount = ClzNibbleTbl[(int)(value >> nibbleIdx) & 0b1111];
count += preCount;
}
while (preCount == 4);
return (ulong)count;
}
public static int CountTrailingZeros32(int value)
{
int count = 0;
while (((value >> count) & 1) == 0)
{
count++;
}
return count;
return BitOperations.IsPow2(value) ? value : Pow2RoundUp(value) >> 1;
}
public static long ReverseBits64(long value)