1 //===-- HexagonMCCodeEmitter.h - Hexagon Target Descriptions ----*- 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 /// \file
11 /// \brief Definition for classes that emit Hexagon machine code from MCInsts
12 ///
13 //===----------------------------------------------------------------------===//
14 
15 #ifndef HEXAGONMCCODEEMITTER_H
16 #define HEXAGONMCCODEEMITTER_H
17 
18 #include "llvm/MC/MCCodeEmitter.h"
19 #include "llvm/MC/MCExpr.h"
20 #include "llvm/MC/MCInst.h"
21 #include "llvm/MC/MCInstrInfo.h"
22 #include "llvm/MC/MCRegisterInfo.h"
23 #include "llvm/MC/MCSubtargetInfo.h"
24 #include "llvm/Support/raw_ostream.h"
25 
26 namespace llvm {
27 
28 class HexagonMCCodeEmitter : public MCCodeEmitter {
29   MCContext &MCT;
30   MCInstrInfo const &MCII;
31   std::unique_ptr<unsigned> Addend;
32   std::unique_ptr<bool> Extended;
33   std::unique_ptr<MCInst const *> CurrentBundle;
34 
35   // helper routine for getMachineOpValue()
36   unsigned getExprOpValue(const MCInst &MI, const MCOperand &MO,
37                           const MCExpr *ME, SmallVectorImpl<MCFixup> &Fixups,
38                           const MCSubtargetInfo &STI) const;
39 
40 public:
41   HexagonMCCodeEmitter(MCInstrInfo const &aMII, MCContext &aMCT);
42 
43   // Return parse bits for instruction `MCI' inside bundle `MCB'
44   uint32_t parseBits(size_t Instruction, size_t Last, MCInst const &MCB,
45                     MCInst const &MCI) const;
46 
47   void encodeInstruction(MCInst const &MI, raw_ostream &OS,
48                          SmallVectorImpl<MCFixup> &Fixups,
49                          MCSubtargetInfo const &STI) const override;
50 
51   void EncodeSingleInstruction(const MCInst &MI, raw_ostream &OS,
52                                SmallVectorImpl<MCFixup> &Fixups,
53                                const MCSubtargetInfo &STI,
54                                uint32_t Parse, size_t Index) const;
55 
56   // \brief TableGen'erated function for getting the
57   // binary encoding for an instruction.
58   uint64_t getBinaryCodeForInstr(MCInst const &MI,
59                                  SmallVectorImpl<MCFixup> &Fixups,
60                                  MCSubtargetInfo const &STI) const;
61 
62   /// \brief Return binary encoding of operand.
63   unsigned getMachineOpValue(MCInst const &MI, MCOperand const &MO,
64                              SmallVectorImpl<MCFixup> &Fixups,
65                              MCSubtargetInfo const &STI) const;
66 }; // class HexagonMCCodeEmitter
67 
68 } // namespace llvm
69 
70 #endif /* HEXAGONMCCODEEMITTER_H */
71