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| author | Berkan Diler <b.diler@gmx.de> | 2022-02-18 02:35:23 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2022-02-18 02:35:23 +0100 |
| commit | 98c838b24c464fd627ad09078250e4801db8967e (patch) | |
| tree | ff1fcd0371d55255bcd39876cc2d685a7fe7485b /Ryujinx.Common/Utilities/BitUtils.cs | |
| parent | 63c9c64196465bd97abacceb1d83fa53de358d23 (diff) | |
Use BitOperations methods and delete now unused BitUtils methods (#3134)1.1.42
Replaces BitUtils.CountTrailingZeros/CountLeadingZeros/IsPowerOfTwo with BitOperations methods
Diffstat (limited to 'Ryujinx.Common/Utilities/BitUtils.cs')
| -rw-r--r-- | Ryujinx.Common/Utilities/BitUtils.cs | 58 |
1 files changed, 2 insertions, 56 deletions
diff --git a/Ryujinx.Common/Utilities/BitUtils.cs b/Ryujinx.Common/Utilities/BitUtils.cs index 180f1063..b231886f 100644 --- a/Ryujinx.Common/Utilities/BitUtils.cs +++ b/Ryujinx.Common/Utilities/BitUtils.cs @@ -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) |