Simplify checks

src/ImageSharp/Common/Helpers/SimdUtils.Convert.cs

@@ -57,7 +57,7 @@ internal static partial class SimdUtils
 
         for (int i = 0; i < source.Length; i++)
         {
-            Unsafe.Add(ref dBase, i) = Unsafe.Add(ref sBase, i) / 255f;
+            Unsafe.Add(ref dBase, (uint)i) = Unsafe.Add(ref sBase, (uint)i) / 255f;
         }
     }
 
@@ -66,12 +66,13 @@ internal static partial class SimdUtils
     {
         ref float sBase = ref MemoryMarshal.GetReference(source);
         ref byte dBase = ref MemoryMarshal.GetReference(destination);
+
         for (int i = 0; i < source.Length; i++)
         {
-            Unsafe.Add(ref dBase, i) = ConvertToByte(Unsafe.Add(ref sBase, i));
+            Unsafe.Add(ref dBase, (uint)i) = ConvertToByte(Unsafe.Add(ref sBase, (uint)i));
         }
     }
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    private static byte ConvertToByte(float f) => (byte)Numerics.Clamp((f * 255F) + 0.5F, 0, 255F);
+    private static byte ConvertToByte(float f) => (byte)Numerics.Clamp((f * 255f) + 0.5f, 0, 255f);
 }

src/ImageSharp/Common/Helpers/SimdUtils.HwIntrinsics.cs

@@ -761,13 +761,10 @@ internal static partial class SimdUtils
         {
             DebugGuard.IsTrue(source.Length == destination.Length, nameof(source), "Input spans must be of same length!");
 
-            if ((Vector512.IsHardwareAccelerated && Avx512F.IsSupported) ||
+            if (Vector128.IsHardwareAccelerated)
-                Avx2.IsSupported ||
-                Sse2.IsSupported ||
-                AdvSimd.IsSupported)
             {
                 int remainder;
-                if (Avx512F.IsSupported)
+                if (Vector512.IsHardwareAccelerated && Avx512F.IsSupported)
                 {
                     remainder = Numerics.ModuloP2(source.Length, Vector512<byte>.Count);
                 }
@@ -805,7 +802,7 @@ internal static partial class SimdUtils
             ReadOnlySpan<byte> source,
             Span<float> destination)
         {
-            if (Avx512F.IsSupported)
+            if (Vector512.IsHardwareAccelerated && Avx512F.IsSupported)
             {
                 DebugVerifySpanInput(source, destination, Vector512<byte>.Count);
 
@@ -870,7 +867,7 @@ internal static partial class SimdUtils
                     Unsafe.Add(ref d, 3) = f3;
                 }
             }
-            else if (Sse2.IsSupported || AdvSimd.IsSupported)
+            else if (Vector128.IsHardwareAccelerated)
             {
                 DebugVerifySpanInput(source, destination, Vector128<byte>.Count);
 
@@ -897,7 +894,7 @@ internal static partial class SimdUtils
                     }
                     else
                     {
-                        // Sse2, AdvSimd
+                        // Sse2, AdvSimd, etc
                         Vector128<byte> b = Vector128.LoadUnsafe(ref sourceBase, si);
                         (Vector128<ushort> s0, Vector128<ushort> s1) = Vector128.Widen(b);
                         (i0, i1) = Vector128.Widen(s0.AsInt16());
@@ -931,13 +928,11 @@ internal static partial class SimdUtils
         {
             DebugGuard.IsTrue(source.Length == destination.Length, nameof(source), "Input spans must be of same length!");
 
-            if ((Vector512.IsHardwareAccelerated && Avx512BW.IsSupported) ||
+            if (Sse2.IsSupported || AdvSimd.IsSupported)
-                (Vector256.IsHardwareAccelerated && Avx2.IsSupported) ||
-                (Vector128.IsHardwareAccelerated && (Sse2.IsSupported || AdvSimd.IsSupported)))
             {
                 int remainder;
 
-                if (Avx512BW.IsSupported)
+                if (Vector512.IsHardwareAccelerated && Avx512BW.IsSupported)
                 {
                     remainder = Numerics.ModuloP2(source.Length, Vector512<byte>.Count);
                 }
@@ -977,7 +972,7 @@ internal static partial class SimdUtils
             ReadOnlySpan<float> source,
             Span<byte> destination)
         {
-            if (Avx512BW.IsSupported)
+            if (Vector512.IsHardwareAccelerated && Avx512BW.IsSupported)
             {
                 DebugVerifySpanInput(source, destination, Vector512<byte>.Count);
 
@@ -1011,8 +1006,7 @@ internal static partial class SimdUtils
                     Unsafe.Add(ref destinationBase, i) = b;
                 }
             }
-            else
+            else if (Avx2.IsSupported)
-            if (Avx2.IsSupported)
             {
                 DebugVerifySpanInput(source, destination, Vector256<byte>.Count);
 
@@ -1046,7 +1040,7 @@ internal static partial class SimdUtils
                     Unsafe.Add(ref destinationBase, i) = b;
                 }
             }
-            else
+            else if (Sse2.IsSupported || AdvSimd.IsSupported)
             {
                 // Sse, AdvSimd
                 DebugVerifySpanInput(source, destination, Vector128<byte>.Count);