ryujinx/Ryujinx.Graphics.Vic/Types/BitfieldExtensions.cs

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using System.Runtime.CompilerServices;
namespace Ryujinx.Graphics.Vic.Types
{
static class BitfieldExtensions
{
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static bool Extract(this int value, int lsb)
{
return ((value >> (lsb & 0x1f)) & 1) != 0;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static int Extract(this int value, int lsb, int length)
{
return (value >> (lsb & 0x1f)) & (int)(uint.MaxValue >> (32 - length));
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static bool Extract(this long value, int lsb)
{
return ((int)(value >> (lsb & 0x3f)) & 1) != 0;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static int Extract(this long value, int lsb, int length)
{
return (int)(value >> (lsb & 0x3f)) & (int)(uint.MaxValue >> (32 - length));
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static int ExtractSx(this long value, int lsb, int length)
{
int shift = lsb & 0x3f;
return (int)((value << (64 - (shift + length))) >> (64 - length));
}
}
}