MCInstPrinter.h revision cde4ce411b1ace4a80ea1dd38df97e8508aed0c9 
1//===-- MCInstPrinter.h - Convert an MCInst to target assembly syntax -----===//
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#ifndef LLVM_MC_MCINSTPRINTER_H
11#define LLVM_MC_MCINSTPRINTER_H
12
13namespace llvm {
14class MCInst;
15class raw_ostream;
16class MCAsmInfo;
17class StringRef;
18
19/// MCInstPrinter - This is an instance of a target assembly language printer
20/// that converts an MCInst to valid target assembly syntax.
21class MCInstPrinter {
22protected:
23  /// CommentStream - a stream that comments can be emitted to if desired.
24  /// Each comment must end with a newline.  This will be null if verbose
25  /// assembly emission is disable.
26  raw_ostream *CommentStream;
27  const MCAsmInfo &MAI;
28
29  /// The current set of available features.
30  unsigned AvailableFeatures;
31public:
32  MCInstPrinter(const MCAsmInfo &mai)
33    : CommentStream(0), MAI(mai), AvailableFeatures(0) {}
34
35  virtual ~MCInstPrinter();
36
37  /// setCommentStream - Specify a stream to emit comments to.
38  void setCommentStream(raw_ostream &OS) { CommentStream = &OS; }
39
40  /// printInst - Print the specified MCInst to the specified raw_ostream.
41  ///
42  virtual void printInst(const MCInst *MI, raw_ostream &OS) = 0;
43
44  /// getOpcodeName - Return the name of the specified opcode enum (e.g.
45  /// "MOV32ri") or empty if we can't resolve it.
46  virtual StringRef getOpcodeName(unsigned Opcode) const;
47
48  /// printRegName - Print the assembler register name.
49  virtual void printRegName(raw_ostream &OS, unsigned RegNo) const;
50
51  unsigned getAvailableFeatures() const { return AvailableFeatures; }
52  void setAvailableFeatures(unsigned Value) { AvailableFeatures = Value; }
53};
54
55} // namespace llvm
56
57#endif
58