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