diff --git a/src/System.Runtime.Intrinsics.Experimental/ref/System.Runtime.Intrinsics.cs b/src/System.Runtime.Intrinsics.Experimental/ref/System.Runtime.Intrinsics.cs
index baa6e1947af1..c02025f876b8 100644
--- a/src/System.Runtime.Intrinsics.Experimental/ref/System.Runtime.Intrinsics.cs
+++ b/src/System.Runtime.Intrinsics.Experimental/ref/System.Runtime.Intrinsics.cs
@@ -264,9 +264,7 @@ public static class Avx
         public static Vector256<float> DuplicateEvenIndexed(Vector256<float> value) { throw null; }
         public static Vector256<double> DuplicateEvenIndexed(Vector256<double> value) { throw null; }
         public static Vector256<float> DuplicateOddIndexed(Vector256<float> value) { throw null; }
-        public static sbyte Extract(Vector256<sbyte> value, byte index) { throw null; }
         public static byte Extract(Vector256<byte> value, byte index) { throw null; }
-        public static short Extract(Vector256<short> value, byte index) { throw null; }
         public static ushort Extract(Vector256<ushort> value, byte index) { throw null; }
         public static int Extract(Vector256<int> value, byte index) { throw null; }
         public static uint Extract(Vector256<uint> value, byte index) { throw null; }
@@ -338,14 +336,14 @@ public static class Avx
         public static unsafe Vector256<uint> LoadDquVector256(uint* address) { throw null; }
         public static unsafe Vector256<long> LoadDquVector256(long* address) { throw null; }
         public static unsafe Vector256<ulong> LoadDquVector256(ulong* address) { throw null; }
-        public static unsafe Vector128<float> MaskLoad(float* address, Vector128<uint> mask) { throw null; }
-        public static unsafe Vector128<double> MaskLoad(double* address, Vector128<ulong> mask) { throw null; }
-        public static unsafe Vector256<float> MaskLoad(float* address, Vector256<uint> mask) { throw null; }
-        public static unsafe Vector256<double> MaskLoad(double* address, Vector256<ulong> mask) { throw null; }
-        public static unsafe void MaskStore(float* address, Vector128<float> mask, Vector128<uint> source) { throw null; }
-        public static unsafe void MaskStore(double* address, Vector128<double> mask, Vector128<ulong> source) { throw null; }
-        public static unsafe void MaskStore(float* address, Vector256<float> mask, Vector256<uint> source) { throw null; }
-        public static unsafe void MaskStore(double* address, Vector256<double> mask, Vector256<ulong> source) { throw null; }
+        public static unsafe Vector128<float> MaskLoad(float* address, Vector128<float> mask) { throw null; }
+        public static unsafe Vector128<double> MaskLoad(double* address, Vector128<double> mask) { throw null; }
+        public static unsafe Vector256<float> MaskLoad(float* address, Vector256<float> mask) { throw null; }
+        public static unsafe Vector256<double> MaskLoad(double* address, Vector256<double> mask) { throw null; }
+        public static unsafe void MaskStore(float* address, Vector128<float> mask, Vector128<float> source) { throw null; }
+        public static unsafe void MaskStore(double* address, Vector128<double> mask, Vector128<double> source) { throw null; }
+        public static unsafe void MaskStore(float* address, Vector256<float> mask, Vector256<float> source) { throw null; }
+        public static unsafe void MaskStore(double* address, Vector256<double> mask, Vector256<double> source) { throw null; }
         public static Vector256<float> Max(Vector256<float> left, Vector256<float> right) { throw null; }
         public static Vector256<double> Max(Vector256<double> left, Vector256<double> right) { throw null; }
         public static Vector256<float> Min(Vector256<float> left, Vector256<float> right) { throw null; }
@@ -1146,7 +1144,6 @@ public static class Sse2
         public static Vector128<ulong> ConvertScalarToVector128UInt64(ulong value) { throw null; }
         public static Vector128<double> Divide(Vector128<double> left, Vector128<double> right) { throw null; }
         public static Vector128<double> DivideScalar(Vector128<double> left, Vector128<double> right) { throw null; }
-        public static short Extract(Vector128<short> value, byte index) { throw null; }
         public static ushort Extract(Vector128<ushort> value, byte index) { throw null; }
         public static Vector128<short> Insert(Vector128<short> value, short data, byte index) { throw null; }
         public static Vector128<ushort> Insert(Vector128<ushort> value, ushort data, byte index) { throw null; }
@@ -1420,7 +1417,6 @@ public static class Sse41
         public static Vector128<long> ConvertToVector128Int64(Vector128<uint> value) { throw null; }
         public static Vector128<float> DotProduct(Vector128<float> left, Vector128<float> right, byte control) { throw null; }
         public static Vector128<double> DotProduct(Vector128<double> left, Vector128<double> right, byte control) { throw null; }
-        public static sbyte Extract(Vector128<sbyte> value, byte index) { throw null; }
         public static byte Extract(Vector128<byte> value, byte index) { throw null; }
         public static int Extract(Vector128<int> value, byte index) { throw null; }
         public static uint Extract(Vector128<uint> value, byte index) { throw null; }
@@ -1439,7 +1435,7 @@ public static class Sse41
         public static Vector128<uint> Insert(Vector128<uint> value, uint data, byte index) { throw null; }
         public static Vector128<long> Insert(Vector128<long> value, long data, byte index) { throw null; }
         public static Vector128<ulong> Insert(Vector128<ulong> value, ulong data, byte index) { throw null; }
-        public static Vector128<float> Insert(Vector128<float> value, float data, byte index) { throw null; }
+        public static Vector128<float> Insert(Vector128<float> value, Vector128<float> data, byte index) { throw null; }
         public static Vector128<sbyte> Max(Vector128<sbyte> left, Vector128<sbyte> right) { throw null; }
         public static Vector128<ushort> Max(Vector128<ushort> left, Vector128<ushort> right) { throw null; }
         public static Vector128<int> Max(Vector128<int> left, Vector128<int> right) { throw null; }