1 //=- WebAssemblyMCCodeEmitter.cpp - Convert WebAssembly code to machine code -//
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 //===----------------------------------------------------------------------===//
11 /// \brief This file implements the WebAssemblyMCCodeEmitter class.
13 //===----------------------------------------------------------------------===//
15 #include "MCTargetDesc/WebAssemblyMCTargetDesc.h"
16 #include "llvm/ADT/Statistic.h"
17 #include "llvm/MC/MCCodeEmitter.h"
18 #include "llvm/MC/MCFixup.h"
19 #include "llvm/MC/MCInst.h"
20 #include "llvm/MC/MCInstrInfo.h"
21 #include "llvm/MC/MCRegisterInfo.h"
22 #include "llvm/MC/MCSubtargetInfo.h"
23 #include "llvm/MC/MCSymbol.h"
24 #include "llvm/Support/raw_ostream.h"
27 #define DEBUG_TYPE "mccodeemitter"
30 class WebAssemblyMCCodeEmitter final : public MCCodeEmitter {
31 const MCRegisterInfo &MRI;
34 WebAssemblyMCCodeEmitter(const MCInstrInfo &, const MCRegisterInfo &mri,
38 ~WebAssemblyMCCodeEmitter() override {}
40 /// TableGen'erated function for getting the binary encoding for an
42 uint64_t getBinaryCodeForInstr(const MCInst &MI,
43 SmallVectorImpl<MCFixup> &Fixups,
44 const MCSubtargetInfo &STI) const;
46 /// Return binary encoding of operand. If the machine operand requires
47 /// relocation, record the relocation and return zero.
48 unsigned getMachineOpValue(const MCInst &MI, const MCOperand &MO,
49 SmallVectorImpl<MCFixup> &Fixups,
50 const MCSubtargetInfo &STI) const;
52 uint64_t getMemoryOpValue(const MCInst &MI, unsigned Op,
53 SmallVectorImpl<MCFixup> &Fixups,
54 const MCSubtargetInfo &STI) const;
56 void encodeInstruction(const MCInst &MI, raw_ostream &OS,
57 SmallVectorImpl<MCFixup> &Fixups,
58 const MCSubtargetInfo &STI) const override;
60 } // end anonymous namespace
62 MCCodeEmitter *llvm::createWebAssemblyMCCodeEmitter(const MCInstrInfo &MCII,
63 const MCRegisterInfo &MRI,
65 return new WebAssemblyMCCodeEmitter(MCII, MRI, Ctx);
68 unsigned WebAssemblyMCCodeEmitter::getMachineOpValue(
69 const MCInst &MI, const MCOperand &MO, SmallVectorImpl<MCFixup> &Fixups,
70 const MCSubtargetInfo &STI) const {
72 return MRI.getEncodingValue(MO.getReg());
74 return static_cast<unsigned>(MO.getImm());
78 assert(MO.getExpr()->getKind() == MCExpr::SymbolRef);
80 assert(false && "FIXME: not implemented yet");
85 void WebAssemblyMCCodeEmitter::encodeInstruction(
86 const MCInst &MI, raw_ostream &OS, SmallVectorImpl<MCFixup> &Fixups,
87 const MCSubtargetInfo &STI) const {
88 assert(false && "FIXME: not implemented yet");
91 // Encode WebAssembly Memory Operand
93 WebAssemblyMCCodeEmitter::getMemoryOpValue(const MCInst &MI, unsigned Op,
94 SmallVectorImpl<MCFixup> &Fixups,
95 const MCSubtargetInfo &STI) const {
96 assert(false && "FIXME: not implemented yet");
100 #include "WebAssemblyGenMCCodeEmitter.inc"