diff --git a/MCInstrDesc.h b/MCInstrDesc.h
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+//===-- llvm/MC/MCInstrDesc.h - Instruction Descriptors -*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the MCOperandInfo and MCInstrDesc classes, which
+// are used to describe target instructions and their operands.
+//
+//===----------------------------------------------------------------------===//
+
+/* Capstone Disassembler Engine */
+/* By Nguyen Anh Quynh <aquynh@gmail.com>, 2013> */
+
+#ifndef CS_LLVM_MC_MCINSTRDESC_H
+#define CS_LLVM_MC_MCINSTRDESC_H
+
+#include <stdbool.h>
+#include <stdint.h>
+
+//===----------------------------------------------------------------------===//
+// Machine Operand Flags and Description
+//===----------------------------------------------------------------------===//
+
+// Operand constraints
+enum MCOI_OperandConstraint {
+	MCOI_TIED_TO = 0,    // Must be allocated the same register as.
+	MCOI_EARLY_CLOBBER   // Operand is an early clobber register operand
+};
+
+/// OperandFlags - These are flags set on operands, but should be considered
+/// private, all access should go through the MCOperandInfo accessors.
+/// See the accessors for a description of what these are.
+enum MCOI_OperandFlags {
+	MCOI_LookupPtrRegClass = 0,
+	MCOI_Predicate,
+	MCOI_OptionalDef
+};
+
+/// Operand Type - Operands are tagged with one of the values of this enum.
+enum MCOI_OperandType {
+	MCOI_OPERAND_UNKNOWN,
+	MCOI_OPERAND_IMMEDIATE,
+	MCOI_OPERAND_REGISTER,
+	MCOI_OPERAND_MEMORY,
+	MCOI_OPERAND_PCREL
+};
+
+
+/// MCOperandInfo - This holds information about one operand of a machine
+/// instruction, indicating the register class for register operands, etc.
+///
+typedef struct MCOperandInfo {
+	/// RegClass - This specifies the register class enumeration of the operand
+	/// if the operand is a register.  If isLookupPtrRegClass is set, then this is
+	/// an index that is passed to TargetRegisterInfo::getPointerRegClass(x) to
+	/// get a dynamic register class.
+	int16_t RegClass;
+
+	/// Flags - These are flags from the MCOI::OperandFlags enum.
+	uint8_t Flags;
+
+	/// OperandType - Information about the type of the operand.
+	uint8_t OperandType;
+
+	/// Lower 16 bits are used to specify which constraints are set. The higher 16
+	/// bits are used to specify the value of constraints (4 bits each).
+	uint32_t Constraints;
+	/// Currently no other information.
+} MCOperandInfo;
+
+
+//===----------------------------------------------------------------------===//
+// Machine Instruction Flags and Description
+//===----------------------------------------------------------------------===//
+
+/// MCInstrDesc flags - These should be considered private to the
+/// implementation of the MCInstrDesc class.  Clients should use the predicate
+/// methods on MCInstrDesc, not use these directly.  These all correspond to
+/// bitfields in the MCInstrDesc::Flags field.
+enum {
+	MCID_Variadic = 0,
+	MCID_HasOptionalDef,
+	MCID_Pseudo,
+	MCID_Return,
+	MCID_Call,
+	MCID_Barrier,
+	MCID_Terminator,
+	MCID_Branch,
+	MCID_IndirectBranch,
+	MCID_Compare,
+	MCID_MoveImm,
+	MCID_Bitcast,
+	MCID_Select,
+	MCID_DelaySlot,
+	MCID_FoldableAsLoad,
+	MCID_MayLoad,
+	MCID_MayStore,
+	MCID_Predicable,
+	MCID_NotDuplicable,
+	MCID_UnmodeledSideEffects,
+	MCID_Commutable,
+	MCID_ConvertibleTo3Addr,
+	MCID_UsesCustomInserter,
+	MCID_HasPostISelHook,
+	MCID_Rematerializable,
+	MCID_CheapAsAMove,
+	MCID_ExtraSrcRegAllocReq,
+	MCID_ExtraDefRegAllocReq
+};
+
+/// MCInstrDesc - Describe properties that are true of each instruction in the
+/// target description file.  This captures information about side effects,
+/// register use and many other things.  There is one instance of this struct
+/// for each target instruction class, and the MachineInstr class points to
+/// this struct directly to describe itself.
+typedef struct MCInstrDesc {
+	unsigned short  Opcode;        // The opcode number
+	unsigned short  NumOperands;   // Num of args (may be more if variable_ops)
+	unsigned short  NumDefs;       // Num of args that are definitions
+	unsigned short  SchedClass;    // enum identifying instr sched class
+	unsigned short  Size;          // Number of bytes in encoding.
+	unsigned        Flags;         // Flags identifying machine instr class
+	uint64_t        TSFlags;       // Target Specific Flag values
+	uint16_t *ImplicitUses;  // Registers implicitly read by this instr
+	uint16_t *ImplicitDefs;  // Registers implicitly defined by this instr
+	MCOperandInfo *OpInfo;   // 'NumOperands' entries about operands
+	uint64_t DeprecatedFeatureMask;// Feature bits that this is deprecated on, if any     
+	// A complex method to determine is a certain is deprecated or not, and return        
+	// the reason for deprecation.
+	//bool (*ComplexDeprecationInfo)(MCInst &, MCSubtargetInfo &, std::string &);           
+	unsigned ComplexDeprecationInfo;	// dummy field, just to satisfy initializer
+} MCInstrDesc;
+
+bool MCOperandInfo_isPredicate(MCOperandInfo *m);
+
+bool MCOperandInfo_isOptionalDef(MCOperandInfo *m);
+
+#endif