1 files changed, 33 insertions, 0 deletions
diff --git a/src/System.Private.CoreLib/shared/System/Runtime/Intrinsics/Arm/Arm64/Base.PlatformNotSupported.cs b/src/System.Private.CoreLib/shared/System/Runtime/Intrinsics/Arm/Arm64/Base.PlatformNotSupported.cs
new file mode 100644
index 000000000..0a13828ee
--- /dev/null
+++ b/src/System.Private.CoreLib/shared/System/Runtime/Intrinsics/Arm/Arm64/Base.PlatformNotSupported.cs
@@ -0,0 +1,33 @@
+using System.Runtime.CompilerServices;
+using System.Runtime.Intrinsics;
+
+
+namespace System.Runtime.Intrinsics.Arm.Arm64
+{
+    /// <summary>
+    /// This class provides access to the Arm64 Base intrinsics
+    ///
+    /// These intrinsics are supported by all Arm64 CPUs
+    /// </summary>
+    [CLSCompliant(false)]
+    public static class Base
+    {
+        public static bool IsSupported { get { return false; }}
+
+        /// <summary>
+        /// Vector LeadingSignCount
+        /// Corresponds to integer forms of ARM64 CLS
+        /// </summary>
+        public static int LeadingSignCount(int  value) { throw new PlatformNotSupportedException(); }
+        public static int LeadingSignCount(long value) { throw new PlatformNotSupportedException(); }
+
+        /// <summary>
+        /// Vector LeadingZeroCount
+        /// Corresponds to integer forms of ARM64 CLZ
+        /// </summary>
+        public static int LeadingZeroCount(int   value) { throw new PlatformNotSupportedException(); }
+        public static int LeadingZeroCount(uint  value) { throw new PlatformNotSupportedException(); }
+        public static int LeadingZeroCount(long  value) { throw new PlatformNotSupportedException(); }
+        public static int LeadingZeroCount(ulong value) { throw new PlatformNotSupportedException(); }
+    }
+}