//===---- MipsABIInfo.h - Information about MIPS ABI's --------------------===//

//

//                     The LLVM Compiler Infrastructure

//

// This file is distributed under the University of Illinois Open Source

// License. See LICENSE.TXT for details.

//

//===----------------------------------------------------------------------===//

#ifndef LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSABIINFO_H

#define LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSABIINFO_H

#include "llvm/ADT/ArrayRef.h"

#include "llvm/ADT/Triple.h"

#include "llvm/MC/MCRegisterInfo.h"

namespace llvm_ks {

class MCTargetOptions;

class StringRef;

class TargetRegisterClass;

class MipsABIInfo {

public:

  enum class ABI { Unknown, O32, N32, N64, EABI };

protected:

  ABI ThisABI;

public:

  MipsABIInfo(ABI ThisABI) : ThisABI(ThisABI) {}

  static MipsABIInfo Unknown() { return MipsABIInfo(ABI::Unknown); }

  static MipsABIInfo O32() { return MipsABIInfo(ABI::O32); }

  static MipsABIInfo N32() { return MipsABIInfo(ABI::N32); }

  static MipsABIInfo N64() { return MipsABIInfo(ABI::N64); }

  static MipsABIInfo EABI() { return MipsABIInfo(ABI::EABI); }

  static MipsABIInfo computeTargetABI(const Triple &TT, StringRef CPU,

                                      const MCTargetOptions &Options);

  bool IsKnown() const { return ThisABI != ABI::Unknown; }

  bool IsO32() const { return ThisABI == ABI::O32; }

  bool IsN32() const { return ThisABI == ABI::N32; }

  bool IsN64() const { return ThisABI == ABI::N64; }

  bool IsEABI() const { return ThisABI == ABI::EABI; }

  ABI GetEnumValue() const { return ThisABI; }

  /// The registers to use for byval arguments.

  ArrayRef<MCPhysReg> GetByValArgRegs() const;

  /// The registers to use for the variable argument list.

  ArrayRef<MCPhysReg> GetVarArgRegs() const;

  /// Ordering of ABI's

  /// MipsGenSubtargetInfo.inc will use this to resolve conflicts when given

  /// multiple ABI options.

  bool operator<(const MipsABIInfo Other) const {

    return ThisABI < Other.GetEnumValue();

  }

  unsigned GetStackPtr() const;

  unsigned GetFramePtr() const;

  unsigned GetBasePtr() const;

  unsigned GetNullPtr() const;

  unsigned GetZeroReg() const;

  unsigned GetPtrAdduOp() const;

  unsigned GetPtrAddiuOp() const;

  unsigned GetGPRMoveOp() const;

  inline bool ArePtrs64bit() const { return IsN64(); }

  inline bool AreGprs64bit() const { return IsN32() || IsN64(); }

  unsigned GetEhDataReg(unsigned I) const;

};

}

#endif