[Proto] Fixed ARM64 Compatibility for Proto

Author: Linwenxuan04

Lagrange.Proto.Test/EncoderTest.cs

@@ -1,4 +1,5 @@
 using System.Buffers;
+using System.Runtime.Intrinsics.X86;
 using Lagrange.Proto.Primitives;
 
 namespace Lagrange.Proto.Test;
@@ -72,6 +73,8 @@ public void TestLongInt()
     [Test]
     public void TestReadTwoInt()
     {
+        if (!Sse3.IsSupported) Assert.Ignore("SSE3 is not supported on this platform.");
+
         var reader = new ProtoReader(_twoInt);
         var (number1, number2) = reader.DecodeVarIntUnsafe<int, int>(_twoInt);
 
@@ -85,6 +88,8 @@ public void TestReadTwoInt()
     [Test]
     public void TestReadLongInt()
     {
+        if (!Sse3.IsSupported) Assert.Ignore("SSE3 is not supported on this platform.");
+        
         var reader = new ProtoReader(_longInt);
         var (number1, number2) = reader.DecodeVarIntUnsafe<long, int>(_longInt);
 
@@ -98,6 +103,8 @@ public void TestReadLongInt()
     [Test]
     public void TestUnsafeRead()
     {
+        if (!Sse3.IsSupported) Assert.Ignore("SSE3 is not supported on this platform.");
+
         Span<byte> longerBuffer = stackalloc byte[256];
         _longInt.AsSpan().CopyTo(longerBuffer);
 

Lagrange.Proto/Primitives/ProtoWriter.cs

@@ -171,8 +171,6 @@ public void WriteRawBytes(ReadOnlySpan<byte> bytes)
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     private unsafe void EncodeVarIntUnsafe<T>(T value) where T : unmanaged, INumberBase<T>
     {
-        if (!Sse2.IsSupported) throw new PlatformNotSupportedException();
-        
         ulong v = ulong.CreateTruncating(value);
 
         if (sizeof(T) <= 4)