//=- SystemZTargetStreamer.h - SystemZ Target Streamer ----------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZTARGETSTREAMER_H
#define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZTARGETSTREAMER_H

#include "llvm/ADT/StringRef.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/FormattedStream.h"
#include <map>
#include <utility>

namespace llvm {
class SystemZHLASMAsmStreamer;

class SystemZTargetStreamer : public MCTargetStreamer {
public:
  SystemZTargetStreamer(MCStreamer &S) : MCTargetStreamer(S) {}

  typedef std::pair<MCInst, const MCSubtargetInfo *> MCInstSTIPair;
  struct CmpMCInst {
    bool operator()(const MCInstSTIPair &MCI_STI_A,
                    const MCInstSTIPair &MCI_STI_B) const {
      if (MCI_STI_A.second != MCI_STI_B.second)
        return uintptr_t(MCI_STI_A.second) < uintptr_t(MCI_STI_B.second);
      const MCInst &A = MCI_STI_A.first;
      const MCInst &B = MCI_STI_B.first;
      assert(A.getNumOperands() == B.getNumOperands() &&
             A.getNumOperands() == 5 && A.getOperand(2).getImm() == 1 &&
             B.getOperand(2).getImm() == 1 && "Unexpected EXRL target MCInst");
      if (A.getOpcode() != B.getOpcode())
        return A.getOpcode() < B.getOpcode();
      if (A.getOperand(0).getReg() != B.getOperand(0).getReg())
        return A.getOperand(0).getReg() < B.getOperand(0).getReg();
      if (A.getOperand(1).getImm() != B.getOperand(1).getImm())
        return A.getOperand(1).getImm() < B.getOperand(1).getImm();
      if (A.getOperand(3).getReg() != B.getOperand(3).getReg())
        return A.getOperand(3).getReg() < B.getOperand(3).getReg();
      if (A.getOperand(4).getImm() != B.getOperand(4).getImm())
        return A.getOperand(4).getImm() < B.getOperand(4).getImm();
      return false;
    }
  };
  typedef std::map<MCInstSTIPair, MCSymbol *, CmpMCInst> EXRLT2SymMap;
  EXRLT2SymMap EXRLTargets2Sym;

  void emitConstantPools() override;

  virtual void emitMachine(StringRef CPUOrCommand) {};

  virtual void emitExtern(StringRef Str) {};
  virtual void emitEnd() {};

  virtual const MCExpr *createWordDiffExpr(MCContext &Ctx, const MCSymbol *Hi,
                                           const MCSymbol *Lo) {
    return nullptr;
  }
};

class SystemZTargetGOFFStreamer : public SystemZTargetStreamer {
public:
  SystemZTargetGOFFStreamer(MCStreamer &S) : SystemZTargetStreamer(S) {}
  const MCExpr *createWordDiffExpr(MCContext &Ctx, const MCSymbol *Hi,
                                   const MCSymbol *Lo) override;
};

class SystemZTargetHLASMStreamer : public SystemZTargetStreamer {
  formatted_raw_ostream &OS;

public:
  SystemZTargetHLASMStreamer(MCStreamer &S, formatted_raw_ostream &OS)
      : SystemZTargetStreamer(S), OS(OS) {}
  SystemZHLASMAsmStreamer &getHLASMStreamer();
  void emitExtern(StringRef Sym) override;
  void emitEnd() override;
  const MCExpr *createWordDiffExpr(MCContext &Ctx, const MCSymbol *Hi,
                                   const MCSymbol *Lo) override;
};

class SystemZTargetELFStreamer : public SystemZTargetStreamer {
public:
  SystemZTargetELFStreamer(MCStreamer &S) : SystemZTargetStreamer(S) {}
  void emitMachine(StringRef CPUOrCommand) override {}
};

class SystemZTargetGNUStreamer : public SystemZTargetStreamer {
  formatted_raw_ostream &OS;

public:
  SystemZTargetGNUStreamer(MCStreamer &S, formatted_raw_ostream &OS)
      : SystemZTargetStreamer(S), OS(OS) {}
  void emitMachine(StringRef CPUOrCommand) override {
    OS << "\t.machine " << CPUOrCommand << "\n";
  }
};

} // end namespace llvm

#endif // LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZTARGETSTREAMER_H