Optimize some Matrix4x4 operations with SSE (dotnet/corefx#31779)

* Optimize some Matrix4x4 operations with SSE

* fix typo

* use SetZeroVector128 instead of SetAllVector128(0.0f)

* [StructLayout(LayoutKind.Sequential)] on top of Matrix4x4

* collapse operators (call corresponding methods)

* mark operators with [MethodImpl(MethodImplOptions.AggressiveInlining)]

* remove [MethodImpl(MethodImplOptions.AggressiveInlining)], call operators inside static methods if SSE is enabled (operators should be small enough to be inlined)

* overwrite value1 in Multiply instead of new instance

* Optimize == and !=

* prefer CompareNotEqual than CompareEqual

* fix typo in == and !=

* clean up methods-operators

* optimize Transpose

* simplify Equals

* improve Transpose

* Lerp as a separate method

* remove SSE from != as it fails some NaN-related tests

* remove unsafe from !=

* wrap intrinsics with #if netcoreapp

* forgot Letp method and usings

* define netcoreapp in csproj

* rename netcoreapp symbol to HAS_INTRINSICS

* Move Equal and Lerp to VectorMath.cs internal helper

* Implement != operator

* Debug.Assert(Sse.IsSupported) in VectorMath

* replace SetAllVector with Shuffle in Multiply

* remove #if HAS_INTRINSICS from VectorMath

* fix indention in System.Numerics.Vectors.csproj


Commit migrated from dotnet/corefx@5ab0d37

src/libraries/System.Numerics.Vectors/src/System.Numerics.Vectors.csproj

@@ -7,6 +7,8 @@
     <IsTargetingNetFx Condition="'$(TargetGroup)'=='netfx' OR '$(TargetGroup)'=='net46'">true</IsTargetingNetFx>
     <IsTargetingNetCoreApp Condition="'$(TargetGroup)'=='netcoreapp' OR '$(TargetGroup)'=='uap' OR '$(TargetGroup)'=='uapaot'">true</IsTargetingNetCoreApp>
     <IsPartialFacadeAssembly Condition="'$(IsTargetingNetFx)'=='true' OR '$(IsTargetingNetCoreApp)'=='true'">true</IsPartialFacadeAssembly>
+    <HasIntrinsics Condition="'$(TargetsNetCoreApp)'=='true'">true</HasIntrinsics>
+    <DefineConstants Condition="'$(HasIntrinsics)'=='true'">$(DefineConstants);HAS_INTRINSICS</DefineConstants>
     <PackageTargetFramework Condition="'$(TargetGroup)' == 'netstandard1.0'">netstandard1.0;portable-net45+win8+wp8+wpa81</PackageTargetFramework>
     <Configurations>net46-Debug;net46-Release;netcoreapp-Unix-Debug;netcoreapp-Unix-Release;netcoreapp-Windows_NT-Debug;netcoreapp-Windows_NT-Release;netfx-Windows_NT-Debug;netfx-Windows_NT-Release;netstandard-Debug;netstandard-Release;netstandard1.0-Debug;netstandard1.0-Release;uap-Windows_NT-Debug;uap-Windows_NT-Release;uapaot-Windows_NT-Debug;uapaot-Windows_NT-Release</Configurations>
   </PropertyGroup>
@@ -62,6 +64,9 @@
     <Compile Include="System\Numerics\Vector4.cs" />
     <Compile Include="System\Numerics\Vector4_Intrinsics.cs" />
   </ItemGroup>
+  <ItemGroup Condition="'$(HasIntrinsics)' == 'true'">
+    <Compile Include="System\Numerics\VectorMath.cs" />
+  </ItemGroup>
   <ItemGroup Condition="'$(IsTargetingNetFx)' == 'true'">
     <Reference Include="mscorlib" />
     <Reference Include="System.Numerics" />