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 MCInstrInfo &MCII;
32 const MCRegisterInfo &MRI;
36 WebAssemblyMCCodeEmitter(const MCInstrInfo &mcii, const MCRegisterInfo &mri,
38 : MCII(mcii), MRI(mri), Ctx(ctx) {}
40 ~WebAssemblyMCCodeEmitter() override {}
42 /// TableGen'erated function for getting the binary encoding for an
44 uint64_t getBinaryCodeForInstr(const MCInst &MI,
45 SmallVectorImpl<MCFixup> &Fixups,
46 const MCSubtargetInfo &STI) const;
48 /// Return binary encoding of operand. If the machine operand requires
49 /// relocation, record the relocation and return zero.
50 unsigned getMachineOpValue(const MCInst &MI, const MCOperand &MO,
51 SmallVectorImpl<MCFixup> &Fixups,
52 const MCSubtargetInfo &STI) const;
54 uint64_t getMemoryOpValue(const MCInst &MI, unsigned Op,
55 SmallVectorImpl<MCFixup> &Fixups,
56 const MCSubtargetInfo &STI) const;
58 void encodeInstruction(const MCInst &MI, raw_ostream &OS,
59 SmallVectorImpl<MCFixup> &Fixups,
60 const MCSubtargetInfo &STI) const override;
62 } // end anonymous namespace
64 MCCodeEmitter *llvm::createWebAssemblyMCCodeEmitter(const MCInstrInfo &MCII,
65 const MCRegisterInfo &MRI,
67 return new WebAssemblyMCCodeEmitter(MCII, MRI, Ctx);
70 unsigned WebAssemblyMCCodeEmitter::getMachineOpValue(
71 const MCInst &MI, const MCOperand &MO, SmallVectorImpl<MCFixup> &Fixups,
72 const MCSubtargetInfo &STI) const {
74 return MRI.getEncodingValue(MO.getReg());
76 return static_cast<unsigned>(MO.getImm());
80 const MCExpr *Expr = MO.getExpr();
82 assert(Expr->getKind() == MCExpr::SymbolRef);
84 assert(false && "FIXME: not implemented yet");
89 void WebAssemblyMCCodeEmitter::encodeInstruction(
90 const MCInst &MI, raw_ostream &OS, SmallVectorImpl<MCFixup> &Fixups,
91 const MCSubtargetInfo &STI) const {
92 assert(false && "FIXME: not implemented yet");
95 // Encode WebAssembly Memory Operand
97 WebAssemblyMCCodeEmitter::getMemoryOpValue(const MCInst &MI, unsigned Op,
98 SmallVectorImpl<MCFixup> &Fixups,
99 const MCSubtargetInfo &STI) const {
100 assert(false && "FIXME: not implemented yet");
104 #include "WebAssemblyGenMCCodeEmitter.inc"