ryujinx/Ryujinx.Common/Utilities/BitfieldExtensions.cs
gdkchan 08831eecf7
IPC refactor part 3+4: New server HIPC message processor (#4188)
* IPC refactor part 3 + 4: New server HIPC message processor with source generator based serialization

* Make types match on calls to AlignUp/AlignDown

* Formatting

* Address some PR feedback

* Move BitfieldExtensions to Ryujinx.Common.Utilities and consolidate implementations

* Rename Reader/Writer to SpanReader/SpanWriter and move to Ryujinx.Common.Memory

* Implement EventType

* Address more PR feedback

* Log request processing errors since they are not normal

* Rename waitable to multiwait and add missing lock

* PR feedback

* Ac_K PR feedback
2023-01-04 23:15:45 +01:00

57 lines
1.9 KiB
C#

using System.Numerics;
using System.Runtime.CompilerServices;
namespace Ryujinx.Common.Utilities
{
public static class BitfieldExtensions
{
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static bool Extract<T>(this T value, int lsb) where T : IBinaryInteger<T>
{
int bitSize = Unsafe.SizeOf<T>() * 8;
lsb &= bitSize - 1;
return !T.IsZero((value >>> lsb) & T.One);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static T Extract<T>(this T value, int lsb, int length) where T : IBinaryInteger<T>
{
int bitSize = Unsafe.SizeOf<T>() * 8;
lsb &= bitSize - 1;
return (value >>> lsb) & (~T.Zero >>> (bitSize - length));
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static T ExtractSx<T>(this T value, int lsb, int length) where T : IBinaryInteger<T>
{
int bitSize = Unsafe.SizeOf<T>() * 8;
int shift = lsb & (bitSize - 1);
return (value << (bitSize - (shift + length))) >> (bitSize - length);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static T Insert<T>(this T value, int lsb, bool toInsert) where T : IBinaryInteger<T>
{
int bitSize = Unsafe.SizeOf<T>() * 8;
lsb &= bitSize - 1;
T mask = T.One << lsb;
return (value & ~mask) | (toInsert ? mask : T.Zero);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static T Insert<T>(this T value, int lsb, int length, T toInsert) where T : IBinaryInteger<T>
{
int bitSize = Unsafe.SizeOf<T>() * 8;
lsb &= bitSize - 1;
T mask = (~T.Zero >>> (bitSize - length)) << lsb;
return (value & ~mask) | ((toInsert << lsb) & mask);
}
}
}