MCInstrInfo.h revision 33b259f46cc281531c36b471862cb0853d2528df
1//===-- llvm/MC/MCInstrInfo.h - Target Instruction Info ---------*- 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 describes the target machine instruction set. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_MC_MCINSTRINFO_H 15#define LLVM_MC_MCINSTRINFO_H 16 17#include "llvm/MC/MCInstrDesc.h" 18#include <cassert> 19 20namespace llvm { 21 22//--------------------------------------------------------------------------- 23/// 24/// MCInstrInfo - Interface to description of machine instruction set 25/// 26class MCInstrInfo { 27 const MCInstrDesc *Desc; // Raw array to allow static init'n 28 unsigned NumOpcodes; // Number of entries in the desc array 29 30public: 31 /// InitMCInstrInfo - Initialize MCInstrInfo, called by TableGen 32 /// auto-generated routines. *DO NOT USE*. 33 void InitMCInstrInfo(const MCInstrDesc *D, unsigned NO) { 34 Desc = D; 35 NumOpcodes = NO; 36 } 37 38 unsigned getNumOpcodes() const { return NumOpcodes; } 39 40 /// get - Return the machine instruction descriptor that corresponds to the 41 /// specified instruction opcode. 42 /// 43 const MCInstrDesc &get(unsigned Opcode) const { 44 assert(Opcode < NumOpcodes && "Invalid opcode!"); 45 return Desc[Opcode]; 46 } 47}; 48 49} // End llvm namespace 50 51#endif 52