1 files changed, 189 insertions, 0 deletions
diff --git a/src/System.Private.CoreLib/shared/System/Runtime/Intrinsics/X86/Enums.cs b/src/System.Private.CoreLib/shared/System/Runtime/Intrinsics/X86/Enums.cs
new file mode 100644
index 000000000..cf8cd4370
--- /dev/null
+++ b/src/System.Private.CoreLib/shared/System/Runtime/Intrinsics/X86/Enums.cs
@@ -0,0 +1,189 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace System.Runtime.Intrinsics.X86
+{
+    public enum FloatComparisonMode : byte
+    {
+        /// <summary>
+        /// _CMP_EQ_OQ
+        /// </summary>
+        EqualOrderedNonSignaling = 0,
+
+        /// <summary>
+        /// _CMP_LT_OS
+        /// </summary>
+        LessThanOrderedSignaling = 1,
+
+        /// <summary>
+        /// _CMP_LE_OS
+        /// </summary>
+        LessThanOrEqualOrderedSignaling = 2,
+
+        /// <summary>
+        /// _CMP_UNORD_Q
+        /// </summary>
+        UnorderedNonSignaling = 3,
+
+        /// <summary>
+        /// _CMP_NEQ_UQ
+        /// </summary>
+        NotEqualUnorderedNonSignaling = 4,
+
+        /// <summary>
+        /// _CMP_NLT_US
+        /// </summary>
+        NotLessThanUnorderedSignaling = 5,
+
+        /// <summary>
+        /// _CMP_NLE_US
+        /// </summary>
+        NotLessThanOrEqualUnorderedSignaling = 6,
+
+        /// <summary>
+        /// _CMP_ORD_Q
+        /// </summary>
+        OrderedNonSignaling = 7,
+
+        /// <summary>
+        /// _CMP_EQ_UQ
+        /// </summary>
+        EqualUnorderedNonSignaling = 8,
+
+        /// <summary>
+        /// _CMP_NGE_US
+        /// </summary>
+        NotGreaterThanOrEqualUnorderedSignaling = 9,
+
+        /// <summary>
+        /// _CMP_NGT_US
+        /// </summary>
+        NotGreaterThanUnorderedSignaling = 10,
+
+        /// <summary>
+        /// _CMP_FALSE_OQ
+        /// </summary>
+        FalseOrderedNonSignaling = 11,
+
+        /// <summary>
+        /// _CMP_NEQ_OQ
+        /// </summary>
+        NotEqualOrderedNonSignaling = 12,
+
+        /// <summary>
+        /// _CMP_GE_OS
+        /// </summary>
+        GreaterThanOrEqualOrderedSignaling = 13,
+
+        /// <summary>
+        /// _CMP_GT_OS
+        /// </summary>
+        GreaterThanOrderedSignaling = 14,
+
+        /// <summary>
+        /// _CMP_TRUE_UQ
+        /// </summary>
+        TrueUnorderedNonSignaling = 15,
+
+        /// <summary>
+        /// _CMP_EQ_OS
+        /// </summary>
+        EqualOrderedSignaling = 16,
+
+        /// <summary>
+        /// _CMP_LT_OQ
+        /// </summary>
+        LessThanOrderedNonSignaling = 17,
+
+        /// <summary>
+        /// _CMP_LE_OQ
+        /// </summary>
+        LessThanOrEqualOrderedNonSignaling = 18,
+
+        /// <summary>
+        /// _CMP_UNORD_S
+        /// </summary>
+        UnorderedSignaling = 19,
+
+        /// <summary>
+        /// _CMP_NEQ_US
+        /// </summary>
+        NotEqualUnorderedSignaling = 20,
+
+        /// <summary>
+        /// _CMP_NLT_UQ
+        /// </summary>
+        NotLessThanUnorderedNonSignaling = 21,
+
+        /// <summary>
+        /// _CMP_NLE_UQ
+        /// </summary>
+        NotLessThanOrEqualUnorderedNonSignaling = 22,
+
+        /// <summary>
+        /// _CMP_ORD_S
+        /// </summary>
+        OrderedSignaling = 23,
+
+        /// <summary>
+        /// _CMP_EQ_US
+        /// </summary>
+        EqualUnorderedSignaling = 24,
+
+        /// <summary>
+        /// _CMP_NGE_UQ
+        /// </summary>
+        NotGreaterThanOrEqualUnorderedNonSignaling = 25,
+
+        /// <summary>
+        /// _CMP_NGT_UQ
+        /// </summary>
+        NotGreaterThanUnorderedNonSignaling = 26,
+
+        /// <summary>
+        /// _CMP_FALSE_OS
+        /// </summary>
+        FalseOrderedSignaling = 27,
+
+        /// <summary>
+        /// _CMP_NEQ_OS
+        /// </summary>
+        NotEqualOrderedSignaling = 28,
+
+        /// <summary>
+        /// _CMP_GE_OQ
+        /// </summary>
+        GreaterThanOrEqualOrderedNonSignaling = 29,
+
+        /// <summary>
+        /// _CMP_GT_OQ
+        /// </summary>
+        GreaterThanOrderedNonSignaling = 30,
+
+        /// <summary>
+        /// _CMP_TRUE_US
+        /// </summary>
+        TrueUnorderedSignaling = 31,
+    }
+
+    public enum StringComparisonMode : byte {
+        EqualAny = 0x00,
+        Ranges = 0x04,
+        EqualEach = 0x08,
+        EqualOrdered = 0x0c,
+        NegativePolarity = 0x10,
+        MaskedNegativePolarity = 0x30,
+        LeastSignificant = 0x00,
+        MostSignificant = 0x40,
+    }
+
+
+    public enum ResultsFlag : byte {
+        CFlag = 0,
+        NotCFlagAndNotZFlag = 1,
+        OFlag = 2,
+        SFlag = 3,
+        ZFlag = 4,
+    }
+}