lib/Target/AVR/MCTargetDesc/AVRMCELFStreamer.cpp

   1 //===--------- AVRMCELFStreamer.cpp - AVR subclass of MCELFStreamer -------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file is a stub that parses a MCInst bundle and passes the
  10 // instructions on to the real streamer.
  11 //
  12 //===----------------------------------------------------------------------===//
  13 #define DEBUG_TYPE "avrmcelfstreamer"
  14
  15 #include "MCTargetDesc/AVRMCELFStreamer.h"
  16 #include "llvm/MC/MCContext.h"
  17 #include "llvm/MC/MCExpr.h"
  18 #include "llvm/MC/MCSymbol.h"
  19 #include "llvm/MC/MCObjectWriter.h"
  20
  21 using namespace llvm;
  22
  23 void AVRMCELFStreamer::EmitValueForModiferKind(
  24     const MCSymbol *Sym, unsigned SizeInBytes, SMLoc Loc,
  25     AVRMCExpr::VariantKind ModifierKind) {
  26   MCSymbolRefExpr::VariantKind Kind = MCSymbolRefExpr::VK_AVR_NONE;
  27   if (ModifierKind == AVRMCExpr::VK_AVR_None) {
  28     Kind = MCSymbolRefExpr::VK_AVR_DIFF8;
  29     if (SizeInBytes == SIZE_LONG)
  30       Kind = MCSymbolRefExpr::VK_AVR_DIFF32;
  31     else if (SizeInBytes == SIZE_WORD)
  32       Kind = MCSymbolRefExpr::VK_AVR_DIFF16;
  33   } else if (ModifierKind == AVRMCExpr::VK_AVR_LO8)
  34     Kind = MCSymbolRefExpr::VK_AVR_LO8;
  35   else if (ModifierKind == AVRMCExpr::VK_AVR_HI8)
  36     Kind = MCSymbolRefExpr::VK_AVR_HI8;
  37   else if (ModifierKind == AVRMCExpr::VK_AVR_HH8)
  38     Kind = MCSymbolRefExpr::VK_AVR_HLO8;
  39   MCELFStreamer::EmitValue(MCSymbolRefExpr::create(Sym, Kind, getContext()),
  40                            SizeInBytes, Loc);
  41 }
  42
  43 namespace llvm {
  44 MCStreamer *createAVRELFStreamer(Triple const &TT, MCContext &Context,
  45                                  std::unique_ptr<MCAsmBackend> MAB,
  46                                  std::unique_ptr<MCObjectWriter> OW,
  47                                  std::unique_ptr<MCCodeEmitter> CE) {
  48   return new AVRMCELFStreamer(Context, std::move(MAB), std::move(OW),
  49                               std::move(CE));
  50 }
  51
  52 } // end namespace llvm