1 //===-- llvm/MC/MCInstrInfo.h - Target Instruction Info ---------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file describes the target machine instruction set.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_MC_MCINSTRINFO_H
15 #define LLVM_MC_MCINSTRINFO_H
17 #include "llvm/MC/MCInstrDesc.h"
22 //---------------------------------------------------------------------------
23 /// \brief Interface to description of machine instruction set.
25 const MCInstrDesc *Desc; // Raw array to allow static init'n
26 const unsigned *InstrNameIndices; // Array for name indices in InstrNameData
27 const char *InstrNameData; // Instruction name string pool
28 unsigned NumOpcodes; // Number of entries in the desc array
31 /// \brief Initialize MCInstrInfo, called by TableGen auto-generated routines.
33 void InitMCInstrInfo(const MCInstrDesc *D, const unsigned *NI, const char *ND,
36 InstrNameIndices = NI;
41 unsigned getNumOpcodes() const { return NumOpcodes; }
43 /// \brief Return the machine instruction descriptor that corresponds to the
44 /// specified instruction opcode.
45 const MCInstrDesc &get(unsigned Opcode) const {
46 assert(Opcode < NumOpcodes && "Invalid opcode!");
50 /// \brief Returns the name for the instructions with the given opcode.
51 const char *getName(unsigned Opcode) const {
52 assert(Opcode < NumOpcodes && "Invalid opcode!");
53 return &InstrNameData[InstrNameIndices[Opcode]];
57 } // End llvm namespace