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Use stackalloc instead of a Buffer20 struct

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This commit is contained in:
Alex Barney 2019-12-17 17:35:03 -06:00
parent ba739d4361
commit 0b3e6afbe2
2 changed files with 1 additions and 55 deletions
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53
Ryujinx.Common/Utilities/Buffers.cs
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@ -56,57 +56,4 @@ namespace Ryujinx.Common.Utilities
return SpanHelpers.AsReadOnlySpan<Buffer16, T>(ref Unsafe.AsRef(in this));
}
}
[DebuggerDisplay("{ToString()}")]
[StructLayout(LayoutKind.Sequential, Size = 20)]
public struct Buffer20
{
[DebuggerBrowsable(DebuggerBrowsableState.Never)] private ulong _dummy0;
[DebuggerBrowsable(DebuggerBrowsableState.Never)] private ulong _dummy1;
[DebuggerBrowsable(DebuggerBrowsableState.Never)] private uint _dummy3;
public byte this[int i]
{
get => Bytes[i];
set => Bytes[i] = value;
}
public Span<byte> Bytes => SpanHelpers.AsByteSpan(ref this);
// Prevent a defensive copy by changing the read-only in reference to a reference with Unsafe.AsRef()
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static implicit operator Span<byte>(in Buffer20 value)
{
return SpanHelpers.AsByteSpan(ref Unsafe.AsRef(in value));
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static implicit operator ReadOnlySpan<byte>(in Buffer20 value)
{
return SpanHelpers.AsReadOnlyByteSpan(ref Unsafe.AsRef(in value));
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public ref T As<T>() where T : unmanaged
{
if (Unsafe.SizeOf<T>() > (uint)Unsafe.SizeOf<Buffer20>())
{
throw new ArgumentException();
}
return ref MemoryMarshal.GetReference(AsSpan<T>());
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public Span<T> AsSpan<T>() where T : unmanaged
{
return SpanHelpers.AsSpan<Buffer20, T>(ref this);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public readonly ReadOnlySpan<T> AsReadOnlySpan<T>() where T : unmanaged
{
return SpanHelpers.AsReadOnlySpan<Buffer20, T>(ref Unsafe.AsRef(in this));
}
}
}

3
Ryujinx.Graphics.Texture/Astc/IntegerEncoded.cs
View file

@ -111,8 +111,7 @@ namespace Ryujinx.Graphics.Texture.Astc
int numberBitsPerValue)
{
// Implement the algorithm in section C.2.12
var mBuf = new Buffer20();
Span<int> m = mBuf.AsSpan<int>();
Span<int> m = stackalloc int[5];
m[0] = bitStream.ReadBits(numberBitsPerValue);
int encoded = bitStream.ReadBits(2);