Merge remote-tracking branch 'upstream/master' into optimization/messenger-shared-pool

Author: Sergio0694

Directory.Build.props

@@ -14,8 +14,8 @@
     <IsTestProject>$(MSBuildProjectName.Contains('Test'))</IsTestProject>
     <IsUwpProject Condition="'$(IsDesignProject)' != 'true'">$(MSBuildProjectName.Contains('Uwp'))</IsUwpProject>
     <IsSampleProject>$(MSBuildProjectName.Contains('Sample'))</IsSampleProject>
-    <DefaultTargetPlatformVersion>18362</DefaultTargetPlatformVersion>
-    <DefaultTargetPlatformMinVersion>16299</DefaultTargetPlatformMinVersion>
+    <DefaultTargetPlatformVersion>19041</DefaultTargetPlatformVersion>
+    <DefaultTargetPlatformMinVersion>17763</DefaultTargetPlatformMinVersion>
     <PackageOutputPath>$(MSBuildThisFileDirectory)bin\nupkg</PackageOutputPath>
   </PropertyGroup>
 

Directory.Build.targets

@@ -1,6 +1,6 @@
 <Project>
   <Choose>
-    <When Condition="'$(TargetFramework)' == 'uap10.0' or '$(TargetFramework)' == 'uap10.0.16299' or '$(TargetFramework)' == 'native' or '$(TargetFramework)' == 'net461'">
+    <When Condition="'$(TargetFramework)' == 'uap10.0' or '$(TargetFramework)' == 'uap10.0.17763' or '$(TargetFramework)' == 'native' or '$(TargetFramework)' == 'net461'">
       <!-- UAP versions for uap10.0 where TPMV isn't implied -->
       <PropertyGroup>
         <TargetPlatformVersion>10.0.$(DefaultTargetPlatformVersion).0</TargetPlatformVersion>
@@ -15,9 +15,6 @@
         <SDKReference Condition="'$(UseWindowsDesktopSdk)' == 'true' " Include="WindowsDesktop, Version=$(TargetPlatformVersion)">
           <Name>Windows Desktop Extensions for the UWP</Name>
         </SDKReference>
-        <SDKReference Condition="'$(UseWindowsMobileSdk)' == 'true' " Include="WindowsMobile, Version=$(TargetPlatformVersion)">
-          <Name>Windows Mobile Extensions for the UWP</Name>
-        </SDKReference>
       </ItemGroup>
     </When>
   </Choose>

GazeInputTest/GazeInputTest.csproj

@@ -11,7 +11,7 @@
     <AssemblyName>GazeInputTest</AssemblyName>
     <DefaultLanguage>en-US</DefaultLanguage>
     <TargetPlatformIdentifier>UAP</TargetPlatformIdentifier>
-    <TargetPlatformVersion Condition=" '$(TargetPlatformVersion)' == '' ">10.0.18362.0</TargetPlatformVersion>
+    <TargetPlatformVersion Condition=" '$(TargetPlatformVersion)' == '' ">10.0.19041.0</TargetPlatformVersion>
     <TargetPlatformMinVersion>10.0.17134.0</TargetPlatformMinVersion>
     <MinimumVisualStudioVersion>14</MinimumVisualStudioVersion>
     <FileAlignment>512</FileAlignment>

Microsoft.Toolkit.HighPerformance/Helpers/BitHelper.cs

@@ -103,6 +103,68 @@ public static bool HasLookupFlag(uint table, int x, int min = 0)
             return valid;
         }
 
+        /// <summary>
+        /// Checks whether the given value has any bytes that are set to 0.
+        /// That is, given a <see cref="uint"/> value, which has a total of 4 bytes,
+        /// it checks whether any of those have all the bits set to 0.
+        /// </summary>
+        /// <param name="value">The input value to check.</param>
+        /// <returns>Whether <paramref name="value"/> has any bytes set to 0.</returns>
+        /// <remarks>
+        /// This method contains no branches.
+        /// For more background on this subject, see <see href="https://graphics.stanford.edu/~seander/bithacks.html#ZeroInWord"/>.
+        /// </remarks>
+        [Pure]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static bool HasZeroByte(uint value)
+        {
+            return ((value - 0x0101_0101u) & ~value & 0x8080_8080u) != 0;
+        }
+
+        /// <summary>
+        /// Checks whether the given value has any bytes that are set to 0.
+        /// This method mirrors <see cref="HasZeroByte(uint)"/>, but with <see cref="ulong"/> values.
+        /// </summary>
+        /// <param name="value">The input value to check.</param>
+        /// <returns>Whether <paramref name="value"/> has any bytes set to 0.</returns>
+        [Pure]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static bool HasZeroByte(ulong value)
+        {
+            return ((value - 0x0101_0101_0101_0101ul) & ~value & 0x8080_8080_8080_8080ul) != 0;
+        }
+
+        /// <summary>
+        /// Checks whether a byte in the input <see cref="uint"/> value matches a target value.
+        /// </summary>
+        /// <param name="value">The input value to check.</param>
+        /// <param name="target">The target byte to look for.</param>
+        /// <returns>Whether <paramref name="value"/> has any bytes set to <paramref name="target"/>.</returns>
+        /// <remarks>
+        /// This method contains no branches.
+        /// For more info, see <see href="https://graphics.stanford.edu/~seander/bithacks.html#ZeroInWord"/>.
+        /// </remarks>
+        [Pure]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static bool HasByteEqualTo(uint value, byte target)
+        {
+            return HasZeroByte(value ^ (0x0101_0101u * target));
+        }
+
+        /// <summary>
+        /// Checks whether a byte in the input <see cref="uint"/> value matches a target value.
+        /// This method mirrors <see cref="HasByteEqualTo(uint,byte)"/>, but with <see cref="ulong"/> values.
+        /// </summary>
+        /// <param name="value">The input value to check.</param>
+        /// <param name="target">The target byte to look for.</param>
+        /// <returns>Whether <paramref name="value"/> has any bytes set to <paramref name="target"/>.</returns>
+        [Pure]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static bool HasByteEqualTo(ulong value, byte target)
+        {
+            return HasZeroByte(value ^ (0x0101_0101_0101_0101u * target));
+        }
+
         /// <summary>
         /// Sets a bit to a specified value.
         /// </summary>