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 20 namespace llvm { 21 22 //--------------------------------------------------------------------------- 23 /// 24 /// MCInstrInfo - Interface to description of machine instruction set 25 /// 26 class MCInstrInfo { 27 const MCInstrDesc *Desc; // Raw array to allow static init'n 28 const unsigned *InstrNameIndices; // Array for name indices in InstrNameData 29 const char *InstrNameData; // Instruction name string pool 30 unsigned NumOpcodes; // Number of entries in the desc array 31 32 public: 33 /// InitMCInstrInfo - Initialize MCInstrInfo, called by TableGen 34 /// auto-generated routines. *DO NOT USE*. 35 void InitMCInstrInfo(const MCInstrDesc *D, const unsigned *NI, const char *ND, 36 unsigned NO) { 37 Desc = D; 38 InstrNameIndices = NI; 39 InstrNameData = ND; 40 NumOpcodes = NO; 41 } 42 43 unsigned getNumOpcodes() const { return NumOpcodes; } 44 45 /// get - Return the machine instruction descriptor that corresponds to the 46 /// specified instruction opcode. 47 /// 48 const MCInstrDesc &get(unsigned Opcode) const { 49 assert(Opcode < NumOpcodes && "Invalid opcode!"); 50 return Desc[Opcode]; 51 } 52 53 /// getName - Returns the name for the instructions with the given opcode. 54 const char *getName(unsigned Opcode) const { 55 assert(Opcode < NumOpcodes && "Invalid opcode!"); 56 return &InstrNameData[InstrNameIndices[Opcode]]; 57 } 58 }; 59 60 } // End llvm namespace 61 62 #endif 63
