MipsMCTargetDesc.h

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//===-- MipsMCTargetDesc.h - Mips Target Descriptions -----------*- 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
//
//===----------------------------------------------------------------------===//
//
// This file provides Mips specific target descriptions.
//
//===----------------------------------------------------------------------===//
 
#ifndef LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSMCTARGETDESC_H
#define LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSMCTARGETDESC_H
 
#include "llvm/MC/MCRegister.h"
#include "llvm/Support/DataTypes.h"
 
#include <memory>
 
namespace llvm {
class MCAsmBackend;
class MCCodeEmitter;
class MCContext;
class MCInstrInfo;
class MCObjectTargetWriter;
class MCObjectWriter;
class MCRegister;
class MCRegisterInfo;
class MCStreamer;
class MCSubtargetInfo;
class MCTargetOptions;
class StringRef;
class Target;
class Triple;
 
MCCodeEmitter *createMipsMCCodeEmitterEB(const MCInstrInfo &MCII,
                                         MCContext &Ctx);
MCCodeEmitter *createMipsMCCodeEmitterEL(const MCInstrInfo &MCII,
                                         MCContext &Ctx);
 
MCAsmBackend *createMipsAsmBackend(const Target &T, const MCSubtargetInfo &STI,
                                   const MCRegisterInfo &MRI,
                                   const MCTargetOptions &Options);
 
/// Construct an MIPS Windows COFF machine code streamer which will generate
/// PE/COFF format object files.
///
/// Takes ownership of \p AB and \p CE.
MCStreamer *createMipsWinCOFFStreamer(MCContext &C,
                                      std::unique_ptr<MCAsmBackend> &&AB,
                                      std::unique_ptr<MCObjectWriter> &&OW,
                                      std::unique_ptr<MCCodeEmitter> &&CE);
 
/// Construct a Mips ELF object writer.
std::unique_ptr<MCObjectTargetWriter>
createMipsELFObjectWriter(const Triple &TT, bool IsN32);
/// Construct a Mips Win COFF object writer.
std::unique_ptr<MCObjectTargetWriter> createMipsWinCOFFObjectWriter();
 
namespace MIPS_MC {
void initLLVMToCVRegMapping(MCRegisterInfo *MRI);
 
/// COP0 hardware encodings reserve five bits each for REG and SEL.
constexpr unsigned encodeCOP0Register(unsigned Reg, unsigned Sel) {
  return (Reg << 5) | Sel;
}
constexpr unsigned getCOP0RegNum(unsigned Encoding) { return Encoding >> 5; }
constexpr unsigned getCOP0Sel(unsigned Encoding) { return Encoding & 31; }
MCRegister getCOP0Register(const MCRegisterInfo &MRI, unsigned Encoding);
 
StringRef selectMipsCPU(const Triple &TT, StringRef CPU);
 
/// Match a symbolic name in RegClassID, or return an invalid register.
MCRegister matchRegisterName(StringRef Name, const MCRegisterInfo &MRI,
                             unsigned RegClassID, unsigned AltIdx);
 
/// Return a GPR name's hardware index, or -1 if unknown.
int getCPURegisterIndex(StringRef Name, const MCRegisterInfo &MRI,
                        unsigned AltIdx, bool *IsDeprecated = nullptr);
}
 
} // End llvm namespace
 
// Defines symbolic names for Mips registers.  This defines a mapping from
// register name to register number.
#define GET_REGINFO_ENUM
#include "MipsGenRegisterInfo.inc"
 
namespace llvm {
namespace Mips {
// Readable names for the GPRs with a dedicated role. Other GPRs use their R<n>
// names, or the MipsABIInfo accessors when their role depends on the ABI.
inline constexpr MCPhysReg GP = R28;
inline constexpr MCPhysReg SP = R29;
inline constexpr MCPhysReg FP = R30;
inline constexpr MCPhysReg RA = R31;
inline constexpr MCPhysReg GP_64 = R28_64;
inline constexpr MCPhysReg SP_64 = R29_64;
inline constexpr MCPhysReg FP_64 = R30_64;
inline constexpr MCPhysReg RA_64 = R31_64;
} // namespace Mips
} // namespace llvm
 
// Defines symbolic names for the Mips instructions.
#define GET_INSTRINFO_ENUM
#define GET_INSTRINFO_MC_HELPER_DECLS
#include "MipsGenInstrInfo.inc"
 
#define GET_SUBTARGETINFO_ENUM
#include "MipsGenSubtargetInfo.inc"
 
#endif