//===-- llvm/MC/MCInst.h - MCInst class -------------------------*- C++ -*-===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // // This file contains the declaration of the MCInst and MCOperand classes, which // is the basic representation used to represent low-level machine code // instructions. // //===----------------------------------------------------------------------===// #ifndef LLVM_MC_MCINST_H #define LLVM_MC_MCINST_H #include "llvm/ADT/SmallVector.h" #include "llvm/Support/DataTypes.h" namespace llvm { class raw_ostream; class MCAsmInfo; class MCExpr; /// MCOperand - Instances of this class represent operands of the MCInst class. /// This is a simple discriminated union. class MCOperand { enum MachineOperandType { kInvalid, ///< Uninitialized. kRegister, ///< Register operand. kImmediate, ///< Immediate operand. kExpr ///< Relocatable immediate operand. }; unsigned char Kind; union { unsigned RegVal; int64_t ImmVal; const MCExpr *ExprVal; }; public: MCOperand() : Kind(kInvalid) {} MCOperand(const MCOperand &RHS) { *this = RHS; } bool isValid() const { return Kind != kInvalid; } bool isReg() const { return Kind == kRegister; } bool isImm() const { return Kind == kImmediate; } bool isExpr() const { return Kind == kExpr; } /// getReg - Returns the register number. unsigned getReg() const { assert(isReg() && "This is not a register operand!"); return RegVal; } /// setReg - Set the register number. void setReg(unsigned Reg) { assert(isReg() && "This is not a register operand!"); RegVal = Reg; } int64_t getImm() const { assert(isImm() && "This is not an immediate"); return ImmVal; } void setImm(int64_t Val) { assert(isImm() && "This is not an immediate"); ImmVal = Val; } const MCExpr *getExpr() const { assert(isExpr() && "This is not an expression"); return ExprVal; } void setExpr(const MCExpr *Val) { assert(isExpr() && "This is not an expression"); ExprVal = Val; } static MCOperand CreateReg(unsigned Reg) { MCOperand Op; Op.Kind = kRegister; Op.RegVal = Reg; return Op; } static MCOperand CreateImm(int64_t Val) { MCOperand Op; Op.Kind = kImmediate; Op.ImmVal = Val; return Op; } static MCOperand CreateExpr(const MCExpr *Val) { MCOperand Op; Op.Kind = kExpr; Op.ExprVal = Val; return Op; } void print(raw_ostream &OS, const MCAsmInfo *MAI) const; void dump() const; }; /// MCInst - Instances of this class represent a single low-level machine /// instruction. class MCInst { unsigned Opcode; SmallVector<MCOperand, 8> Operands; public: MCInst() : Opcode(0) {} void setOpcode(unsigned Op) { Opcode = Op; } unsigned getOpcode() const { return Opcode; } const MCOperand &getOperand(unsigned i) const { return Operands[i]; } MCOperand &getOperand(unsigned i) { return Operands[i]; } unsigned getNumOperands() const { return Operands.size(); } void addOperand(const MCOperand &Op) { Operands.push_back(Op); } void print(raw_ostream &OS, const MCAsmInfo *MAI) const; void dump() const; }; } // end namespace llvm #endif