Use proper constant

JimBobSquarePants · JimBobSquarePants · commit c9b4edda19f6 · 2024-01-15T17:18:31.000+10:00
diff --git a/src/ImageSharp/Common/Helpers/Vector128Utilities.cs b/src/ImageSharp/Common/Helpers/Vector128Utilities.cs
@@ -140,7 +140,7 @@ public static Vector128<byte> ShiftLeftBytesInVector(Vector128<byte> value, [Con
         if (AdvSimd.IsSupported)
         {
 #pragma warning disable CA1857 // A constant is expected for the parameter
-            return AdvSimd.ExtractVector128(Vector128<byte>.Zero, value, (byte)(16 - numBytes));
+            return AdvSimd.ExtractVector128(Vector128<byte>.Zero, value, (byte)(Vector128<byte>.Count - numBytes));
 #pragma warning restore CA1857 // A constant is expected for the parameter
         }
 

Original file line number	Diff line number	Diff line change
`@@ -140,7 +140,7 @@ public static Vector128<byte> ShiftLeftBytesInVector(Vector128<byte> value, [Con`
`140`	`140`	`if (AdvSimd.IsSupported)`
`141`	`141`	`{`
`142`	`142`	`#pragma warning disable CA1857 // A constant is expected for the parameter`
`143`		`- return AdvSimd.ExtractVector128(Vector128<byte>.Zero, value, (byte)(16 - numBytes));`
	`143`	`+ return AdvSimd.ExtractVector128(Vector128<byte>.Zero, value, (byte)(Vector128<byte>.Count - numBytes));`
`144`	`144`	`#pragma warning restore CA1857 // A constant is expected for the parameter`
`145`	`145`	`}`
`146`	`146`