1 //===-- llvm/MC/MCInstrInfo.h - Target Instruction Info ---------*- C++ -*-===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 // This file describes the target machine instruction set.
11 //===----------------------------------------------------------------------===//
13 #ifndef LLVM_MC_MCINSTRINFO_H
14 #define LLVM_MC_MCINSTRINFO_H
16 #include "llvm/MC/MCInstrDesc.h"
21 //---------------------------------------------------------------------------
22 /// Interface to description of machine instruction set.
24 const MCInstrDesc *Desc; // Raw array to allow static init'n
25 const unsigned *InstrNameIndices; // Array for name indices in InstrNameData
26 const char *InstrNameData; // Instruction name string pool
27 unsigned NumOpcodes; // Number of entries in the desc array
30 /// Initialize MCInstrInfo, called by TableGen auto-generated routines.
32 void InitMCInstrInfo(const MCInstrDesc *D, const unsigned *NI, const char *ND,
35 InstrNameIndices = NI;
40 unsigned getNumOpcodes() const { return NumOpcodes; }
42 /// Return the machine instruction descriptor that corresponds to the
43 /// specified instruction opcode.
44 const MCInstrDesc &get(unsigned Opcode) const {
45 assert(Opcode < NumOpcodes && "Invalid opcode!");
49 /// Returns the name for the instructions with the given opcode.
50 StringRef getName(unsigned Opcode) const {
51 assert(Opcode < NumOpcodes && "Invalid opcode!");
52 return StringRef(&InstrNameData[InstrNameIndices[Opcode]]);
56 } // End llvm namespace