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-rw-r--r--Ryujinx.Common/Utilities/BitfieldExtensions.cs57
1 files changed, 57 insertions, 0 deletions
diff --git a/Ryujinx.Common/Utilities/BitfieldExtensions.cs b/Ryujinx.Common/Utilities/BitfieldExtensions.cs
new file mode 100644
index 00000000..ca429944
--- /dev/null
+++ b/Ryujinx.Common/Utilities/BitfieldExtensions.cs
@@ -0,0 +1,57 @@
+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);
+ }
+ }
+} \ No newline at end of file