1 //===-- llvm/MC/MCInst.h - MCInst class -------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file contains the declaration of the MCInst and MCOperand classes, which 11 // is the basic representation used to represent low-level machine code 12 // instructions. 13 // 14 //===----------------------------------------------------------------------===// 15 16 #ifndef LLVM_MC_MCINST_H 17 #define LLVM_MC_MCINST_H 18 19 #include "llvm/ADT/SmallVector.h" 20 #include "llvm/ADT/StringRef.h" 21 #include "llvm/Support/DataTypes.h" 22 23 namespace llvm { 24 class raw_ostream; 25 class MCAsmInfo; 26 class MCInstPrinter; 27 class MCExpr; 28 29 /// MCOperand - Instances of this class represent operands of the MCInst class. 30 /// This is a simple discriminated union. 31 class MCOperand { 32 enum MachineOperandType { 33 kInvalid, ///< Uninitialized. 34 kRegister, ///< Register operand. 35 kImmediate, ///< Immediate operand. 36 kFPImmediate, ///< Floating-point immediate operand. 37 kExpr ///< Relocatable immediate operand. 38 }; 39 unsigned char Kind; 40 41 union { 42 unsigned RegVal; 43 int64_t ImmVal; 44 double FPImmVal; 45 const MCExpr *ExprVal; 46 }; 47 public: 48 49 MCOperand() : Kind(kInvalid), FPImmVal(0.0) {} 50 51 bool isValid() const { return Kind != kInvalid; } 52 bool isReg() const { return Kind == kRegister; } 53 bool isImm() const { return Kind == kImmediate; } 54 bool isFPImm() const { return Kind == kFPImmediate; } 55 bool isExpr() const { return Kind == kExpr; } 56 57 /// getReg - Returns the register number. 58 unsigned getReg() const { 59 assert(isReg() && "This is not a register operand!"); 60 return RegVal; 61 } 62 63 /// setReg - Set the register number. 64 void setReg(unsigned Reg) { 65 assert(isReg() && "This is not a register operand!"); 66 RegVal = Reg; 67 } 68 69 int64_t getImm() const { 70 assert(isImm() && "This is not an immediate"); 71 return ImmVal; 72 } 73 void setImm(int64_t Val) { 74 assert(isImm() && "This is not an immediate"); 75 ImmVal = Val; 76 } 77 78 double getFPImm() const { 79 assert(isFPImm() && "This is not an FP immediate"); 80 return FPImmVal; 81 } 82 83 void setFPImm(double Val) { 84 assert(isFPImm() && "This is not an FP immediate"); 85 FPImmVal = Val; 86 } 87 88 const MCExpr *getExpr() const { 89 assert(isExpr() && "This is not an expression"); 90 return ExprVal; 91 } 92 void setExpr(const MCExpr *Val) { 93 assert(isExpr() && "This is not an expression"); 94 ExprVal = Val; 95 } 96 97 static MCOperand CreateReg(unsigned Reg) { 98 MCOperand Op; 99 Op.Kind = kRegister; 100 Op.RegVal = Reg; 101 return Op; 102 } 103 static MCOperand CreateImm(int64_t Val) { 104 MCOperand Op; 105 Op.Kind = kImmediate; 106 Op.ImmVal = Val; 107 return Op; 108 } 109 static MCOperand CreateFPImm(double Val) { 110 MCOperand Op; 111 Op.Kind = kFPImmediate; 112 Op.FPImmVal = Val; 113 return Op; 114 } 115 static MCOperand CreateExpr(const MCExpr *Val) { 116 MCOperand Op; 117 Op.Kind = kExpr; 118 Op.ExprVal = Val; 119 return Op; 120 } 121 122 void print(raw_ostream &OS, const MCAsmInfo *MAI) const; 123 void dump() const; 124 }; 125 126 template <> struct isPodLike<MCOperand> { static const bool value = true; }; 127 128 /// MCInst - Instances of this class represent a single low-level machine 129 /// instruction. 130 class MCInst { 131 unsigned Opcode; 132 SmallVector<MCOperand, 8> Operands; 133 public: 134 MCInst() : Opcode(0) {} 135 136 void setOpcode(unsigned Op) { Opcode = Op; } 137 138 unsigned getOpcode() const { return Opcode; } 139 140 const MCOperand &getOperand(unsigned i) const { return Operands[i]; } 141 MCOperand &getOperand(unsigned i) { return Operands[i]; } 142 unsigned getNumOperands() const { return Operands.size(); } 143 144 void addOperand(const MCOperand &Op) { 145 Operands.push_back(Op); 146 } 147 148 void clear() { Operands.clear(); } 149 size_t size() { return Operands.size(); } 150 151 typedef SmallVector<MCOperand, 8>::iterator iterator; 152 iterator begin() { return Operands.begin(); } 153 iterator end() { return Operands.end(); } 154 iterator insert(iterator I, const MCOperand &Op) { 155 return Operands.insert(I, Op); 156 } 157 158 void print(raw_ostream &OS, const MCAsmInfo *MAI) const; 159 void dump() const; 160 161 /// \brief Dump the MCInst as prettily as possible using the additional MC 162 /// structures, if given. Operators are separated by the \arg Separator 163 /// string. 164 void dump_pretty(raw_ostream &OS, const MCAsmInfo *MAI = 0, 165 const MCInstPrinter *Printer = 0, 166 StringRef Separator = " ") const; 167 }; 168 169 inline raw_ostream& operator<<(raw_ostream &OS, const MCOperand &MO) { 170 MO.print(OS, 0); 171 return OS; 172 } 173 174 inline raw_ostream& operator<<(raw_ostream &OS, const MCInst &MI) { 175 MI.print(OS, 0); 176 return OS; 177 } 178 179 } // end namespace llvm 180 181 #endif 182
