| //=- WebAssemblyMCCodeEmitter.cpp - Convert WebAssembly code to machine code -// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| /// |
| /// \file |
| /// \brief This file implements the WebAssemblyMCCodeEmitter class. |
| /// |
| //===----------------------------------------------------------------------===// |
| |
| #include "MCTargetDesc/WebAssemblyMCTargetDesc.h" |
| #include "llvm/ADT/Statistic.h" |
| #include "llvm/MC/MCCodeEmitter.h" |
| #include "llvm/MC/MCFixup.h" |
| #include "llvm/MC/MCInst.h" |
| #include "llvm/MC/MCInstrInfo.h" |
| #include "llvm/MC/MCRegisterInfo.h" |
| #include "llvm/MC/MCSubtargetInfo.h" |
| #include "llvm/MC/MCSymbol.h" |
| #include "llvm/Support/raw_ostream.h" |
| using namespace llvm; |
| |
| #define DEBUG_TYPE "mccodeemitter" |
| |
| namespace { |
| class WebAssemblyMCCodeEmitter final : public MCCodeEmitter { |
| const MCRegisterInfo &MRI; |
| |
| public: |
| WebAssemblyMCCodeEmitter(const MCInstrInfo &, const MCRegisterInfo &mri, |
| MCContext &) |
| : MRI(mri) {} |
| |
| ~WebAssemblyMCCodeEmitter() override {} |
| |
| /// TableGen'erated function for getting the binary encoding for an |
| /// instruction. |
| uint64_t getBinaryCodeForInstr(const MCInst &MI, |
| SmallVectorImpl<MCFixup> &Fixups, |
| const MCSubtargetInfo &STI) const; |
| |
| /// Return binary encoding of operand. If the machine operand requires |
| /// relocation, record the relocation and return zero. |
| unsigned getMachineOpValue(const MCInst &MI, const MCOperand &MO, |
| SmallVectorImpl<MCFixup> &Fixups, |
| const MCSubtargetInfo &STI) const; |
| |
| uint64_t getMemoryOpValue(const MCInst &MI, unsigned Op, |
| SmallVectorImpl<MCFixup> &Fixups, |
| const MCSubtargetInfo &STI) const; |
| |
| void encodeInstruction(const MCInst &MI, raw_ostream &OS, |
| SmallVectorImpl<MCFixup> &Fixups, |
| const MCSubtargetInfo &STI) const override; |
| }; |
| } // end anonymous namespace |
| |
| MCCodeEmitter *llvm::createWebAssemblyMCCodeEmitter(const MCInstrInfo &MCII, |
| const MCRegisterInfo &MRI, |
| MCContext &Ctx) { |
| return new WebAssemblyMCCodeEmitter(MCII, MRI, Ctx); |
| } |
| |
| unsigned WebAssemblyMCCodeEmitter::getMachineOpValue( |
| const MCInst &MI, const MCOperand &MO, SmallVectorImpl<MCFixup> &Fixups, |
| const MCSubtargetInfo &STI) const { |
| if (MO.isReg()) |
| return MRI.getEncodingValue(MO.getReg()); |
| if (MO.isImm()) |
| return static_cast<unsigned>(MO.getImm()); |
| |
| assert(MO.isExpr()); |
| |
| assert(MO.getExpr()->getKind() == MCExpr::SymbolRef); |
| |
| assert(false && "FIXME: not implemented yet"); |
| |
| return 0; |
| } |
| |
| void WebAssemblyMCCodeEmitter::encodeInstruction( |
| const MCInst &MI, raw_ostream &OS, SmallVectorImpl<MCFixup> &Fixups, |
| const MCSubtargetInfo &STI) const { |
| assert(false && "FIXME: not implemented yet"); |
| } |
| |
| // Encode WebAssembly Memory Operand |
| uint64_t |
| WebAssemblyMCCodeEmitter::getMemoryOpValue(const MCInst &MI, unsigned Op, |
| SmallVectorImpl<MCFixup> &Fixups, |
| const MCSubtargetInfo &STI) const { |
| assert(false && "FIXME: not implemented yet"); |
| return 0; |
| } |
| |
| #include "WebAssemblyGenMCCodeEmitter.inc" |