MipsTargetStreamer.h

Go to the documentation of this file.

//===-- MipsTargetStreamer.h - Mips 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_MIPS_MIPSTARGETSTREAMER_H
#define LLVM_LIB_TARGET_MIPS_MIPSTARGETSTREAMER_H
 
#include "MCTargetDesc/MipsABIFlagsSection.h"
#include "MCTargetDesc/MipsABIInfo.h"
#include "MCTargetDesc/MipsMCOptions.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/MC/MCELFStreamer.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCStreamer.h"
 
namespace llvm {
 
class formatted_raw_ostream;
 
class MipsTargetStreamer : public MCTargetStreamer {
public:
  MipsTargetStreamer(MCStreamer &S);
 
  virtual void emitGPRel32Value(const MCExpr *);
  virtual void emitGPRel64Value(const MCExpr *);
  virtual void emitDTPRel32Value(const MCExpr *);
  virtual void emitDTPRel64Value(const MCExpr *);
  virtual void emitTPRel32Value(const MCExpr *);
  virtual void emitTPRel64Value(const MCExpr *);
 
  virtual void setPic(bool Value) {}
 
  virtual void emitDirectiveSetMicroMips();
  virtual void emitDirectiveSetNoMicroMips();
  virtual void setUsesMicroMips();
  virtual void emitDirectiveSetMips16();
  virtual void emitDirectiveSetNoMips16();
 
  virtual void emitDirectiveSetReorder();
  virtual void emitDirectiveSetNoReorder();
  virtual void emitDirectiveSetMacro();
  virtual void emitDirectiveSetNoMacro();
  virtual void emitDirectiveSetMsa();
  virtual void emitDirectiveSetNoMsa();
  virtual void emitDirectiveSetMt();
  virtual void emitDirectiveSetNoMt();
  virtual void emitDirectiveSetCRC();
  virtual void emitDirectiveSetNoCRC();
  virtual void emitDirectiveSetVirt();
  virtual void emitDirectiveSetNoVirt();
  virtual void emitDirectiveSetGINV();
  virtual void emitDirectiveSetNoGINV();
  virtual void emitDirectiveSetEVA();
  virtual void emitDirectiveSetNoEVA();
  virtual void emitDirectiveSetAt();
  virtual void emitDirectiveSetAtWithArg(unsigned RegNo);
  virtual void emitDirectiveSetNoAt();
  virtual void emitDirectiveEnd(StringRef Name);
 
  virtual void emitDirectiveEnt(const MCSymbol &Symbol);
  virtual void emitDirectiveAbiCalls();
  virtual void emitDirectiveNaN2008();
  virtual void emitDirectiveNaNLegacy();
  virtual void emitDirectiveOptionPic0();
  virtual void emitDirectiveOptionPic2();
  virtual void emitDirectiveInsn();
  virtual void emitFrame(MCRegister StackReg, unsigned StackSize,
                         MCRegister ReturnReg);
  virtual void emitMask(unsigned CPUBitmask, int CPUTopSavedRegOff);
  virtual void emitFMask(unsigned FPUBitmask, int FPUTopSavedRegOff);
 
  virtual void emitDirectiveSetArch(StringRef Arch);
  virtual void emitDirectiveSetMips0();
  virtual void emitDirectiveSetMips1();
  virtual void emitDirectiveSetMips2();
  virtual void emitDirectiveSetMips3();
  virtual void emitDirectiveSetMips4();
  virtual void emitDirectiveSetMips5();
  virtual void emitDirectiveSetMips32();
  virtual void emitDirectiveSetMips32R2();
  virtual void emitDirectiveSetMips32R3();
  virtual void emitDirectiveSetMips32R5();
  virtual void emitDirectiveSetMips32R6();
  virtual void emitDirectiveSetMips64();
  virtual void emitDirectiveSetMips64R2();
  virtual void emitDirectiveSetMips64R3();
  virtual void emitDirectiveSetMips64R5();
  virtual void emitDirectiveSetMips64R6();
  virtual void emitDirectiveSetDsp();
  virtual void emitDirectiveSetDspr2();
  virtual void emitDirectiveSetNoDsp();
  virtual void emitDirectiveSetMips3D();
  virtual void emitDirectiveSetNoMips3D();
  virtual void emitDirectiveSetPop();
  virtual void emitDirectiveSetPush();
  virtual void emitDirectiveSetSoftFloat();
  virtual void emitDirectiveSetHardFloat();
 
  // PIC support
  virtual void emitDirectiveCpAdd(MCRegister Reg);
  virtual void emitDirectiveCpLoad(MCRegister Reg);
  virtual void emitDirectiveCpLocal(MCRegister Reg);
  virtual bool emitDirectiveCpRestore(int Offset,
                                      function_ref<MCRegister()> GetATReg,
                                      SMLoc IDLoc, const MCSubtargetInfo *STI);
  virtual void emitDirectiveCpsetup(MCRegister Reg, int RegOrOffset,
                                    const MCSymbol &Sym, bool IsReg);
  virtual void emitDirectiveCpreturn(unsigned SaveLocation,
                                     bool SaveLocationIsRegister);
 
  // FP abiflags directives
  virtual void emitDirectiveModuleFP();
  virtual void emitDirectiveModuleOddSPReg();
  virtual void emitDirectiveModuleSoftFloat();
  virtual void emitDirectiveModuleHardFloat();
  virtual void emitDirectiveModuleMT();
  virtual void emitDirectiveSetFp(MipsABIFlagsSection::FpABIKind Value);
  virtual void emitDirectiveSetOddSPReg();
  virtual void emitDirectiveSetNoOddSPReg();
  virtual void emitDirectiveModuleCRC();
  virtual void emitDirectiveModuleNoCRC();
  virtual void emitDirectiveModuleVirt();
  virtual void emitDirectiveModuleNoVirt();
  virtual void emitDirectiveModuleGINV();
  virtual void emitDirectiveModuleNoGINV();
 
  void emitR(unsigned Opcode, MCRegister Reg0, SMLoc IDLoc,
             const MCSubtargetInfo *STI);
  void emitII(unsigned Opcode, int16_t Imm1, int16_t Imm2, SMLoc IDLoc,
              const MCSubtargetInfo *STI);
  void emitRX(unsigned Opcode, MCRegister Reg0, MCOperand Op1, SMLoc IDLoc,
              const MCSubtargetInfo *STI);
  void emitRI(unsigned Opcode, MCRegister Reg0, int32_t Imm, SMLoc IDLoc,
              const MCSubtargetInfo *STI);
  void emitRR(unsigned Opcode, MCRegister Reg0, MCRegister Reg1, SMLoc IDLoc,
              const MCSubtargetInfo *STI);
  void emitRRX(unsigned Opcode, MCRegister Reg0, MCRegister Reg1, MCOperand Op2,
               SMLoc IDLoc, const MCSubtargetInfo *STI);
  void emitRRR(unsigned Opcode, MCRegister Reg0, MCRegister Reg1,
               MCRegister Reg2, SMLoc IDLoc, const MCSubtargetInfo *STI);
  void emitRRRX(unsigned Opcode, MCRegister Reg0, MCRegister Reg1,
                MCRegister Reg2, MCOperand Op3, SMLoc IDLoc,
                const MCSubtargetInfo *STI);
  void emitRRI(unsigned Opcode, MCRegister Reg0, MCRegister Reg1, int16_t Imm,
               SMLoc IDLoc, const MCSubtargetInfo *STI);
  void emitRRIII(unsigned Opcode, MCRegister Reg0, MCRegister Reg1,
                 int16_t Imm0, int16_t Imm1, int16_t Imm2, SMLoc IDLoc,
                 const MCSubtargetInfo *STI);
  void emitAddu(MCRegister DstReg, MCRegister SrcReg, MCRegister TrgReg,
                bool Is64Bit, const MCSubtargetInfo *STI);
  void emitDSLL(MCRegister DstReg, MCRegister SrcReg, int16_t ShiftAmount,
                SMLoc IDLoc, const MCSubtargetInfo *STI);
  void emitEmptyDelaySlot(bool hasShortDelaySlot, SMLoc IDLoc,
                          const MCSubtargetInfo *STI);
  void emitNop(SMLoc IDLoc, const MCSubtargetInfo *STI);
 
  /// Emit a store instruction with an offset. If the offset is out of range
  /// then it will be synthesized using the assembler temporary.
  ///
  /// GetATReg() is a callback that can be used to obtain the current assembler
  /// temporary and is only called when the assembler temporary is required. It
  /// must handle the case where no assembler temporary is available (typically
  /// by reporting an error).
  void emitStoreWithImmOffset(unsigned Opcode, MCRegister SrcReg,
                              MCRegister BaseReg, int64_t Offset,
                              function_ref<MCRegister()> GetATReg, SMLoc IDLoc,
                              const MCSubtargetInfo *STI);
  void emitLoadWithImmOffset(unsigned Opcode, MCRegister DstReg,
                             MCRegister BaseReg, int64_t Offset,
                             MCRegister TmpReg, SMLoc IDLoc,
                             const MCSubtargetInfo *STI);
  void emitGPRestore(int Offset, SMLoc IDLoc, const MCSubtargetInfo *STI);
 
  void forbidModuleDirective() { ModuleDirectiveAllowed = false; }
  void reallowModuleDirective() { ModuleDirectiveAllowed = true; }
  bool isModuleDirectiveAllowed() { return ModuleDirectiveAllowed; }
 
  // This method enables template classes to set internal abi flags
  // structure values.
  template <class PredicateLibrary>
  void updateABIInfo(const PredicateLibrary &P) {
    ABI = P.getABI();
    ABIFlagsSection.setAllFromPredicates(P);
  }
 
  MipsABIFlagsSection &getABIFlagsSection() { return ABIFlagsSection; }
  const MipsABIInfo &getABI() const {
    assert(ABI && "ABI hasn't been set!");
    return *ABI;
  }
 
protected:
  std::optional<MipsABIInfo> ABI;
  MipsABIFlagsSection ABIFlagsSection;
 
  bool GPRInfoSet;
  unsigned GPRBitMask;
  int GPROffset;
 
  bool FPRInfoSet;
  unsigned FPRBitMask;
  int FPROffset;
 
  bool FrameInfoSet;
  int FrameOffset;
  unsigned FrameReg;
  MCRegister GPReg;
  unsigned ReturnReg;
 
private:
  bool ModuleDirectiveAllowed;
};
 
// This part is for ascii assembly output
class MipsTargetAsmStreamer : public MipsTargetStreamer {
  formatted_raw_ostream &OS;
 
public:
  MipsTargetAsmStreamer(MCStreamer &S, formatted_raw_ostream &OS);
 
  void emitGPRel32Value(const MCExpr *) override;
  void emitGPRel64Value(const MCExpr *) override;
  void emitDTPRel32Value(const MCExpr *) override;
  void emitDTPRel64Value(const MCExpr *) override;
  void emitTPRel32Value(const MCExpr *) override;
  void emitTPRel64Value(const MCExpr *) override;
 
  void emitDirectiveSetMicroMips() override;
  void emitDirectiveSetNoMicroMips() override;
  void emitDirectiveSetMips16() override;
  void emitDirectiveSetNoMips16() override;
 
  void emitDirectiveSetReorder() override;
  void emitDirectiveSetNoReorder() override;
  void emitDirectiveSetMacro() override;
  void emitDirectiveSetNoMacro() override;
  void emitDirectiveSetMsa() override;
  void emitDirectiveSetNoMsa() override;
  void emitDirectiveSetMt() override;
  void emitDirectiveSetNoMt() override;
  void emitDirectiveSetCRC() override;
  void emitDirectiveSetNoCRC() override;
  void emitDirectiveSetVirt() override;
  void emitDirectiveSetNoVirt() override;
  void emitDirectiveSetGINV() override;
  void emitDirectiveSetNoGINV() override;
  void emitDirectiveSetEVA() override;
  void emitDirectiveSetNoEVA() override;
  void emitDirectiveSetAt() override;
  void emitDirectiveSetAtWithArg(unsigned RegNo) override;
  void emitDirectiveSetNoAt() override;
  void emitDirectiveEnd(StringRef Name) override;
 
  void emitDirectiveEnt(const MCSymbol &Symbol) override;
  void emitDirectiveAbiCalls() override;
  void emitDirectiveNaN2008() override;
  void emitDirectiveNaNLegacy() override;
  void emitDirectiveOptionPic0() override;
  void emitDirectiveOptionPic2() override;
  void emitDirectiveInsn() override;
  void emitFrame(MCRegister StackReg, unsigned StackSize,
                 MCRegister ReturnReg) override;
  void emitMask(unsigned CPUBitmask, int CPUTopSavedRegOff) override;
  void emitFMask(unsigned FPUBitmask, int FPUTopSavedRegOff) override;
 
  void emitDirectiveSetArch(StringRef Arch) override;
  void emitDirectiveSetMips0() override;
  void emitDirectiveSetMips1() override;
  void emitDirectiveSetMips2() override;
  void emitDirectiveSetMips3() override;
  void emitDirectiveSetMips4() override;
  void emitDirectiveSetMips5() override;
  void emitDirectiveSetMips32() override;
  void emitDirectiveSetMips32R2() override;
  void emitDirectiveSetMips32R3() override;
  void emitDirectiveSetMips32R5() override;
  void emitDirectiveSetMips32R6() override;
  void emitDirectiveSetMips64() override;
  void emitDirectiveSetMips64R2() override;
  void emitDirectiveSetMips64R3() override;
  void emitDirectiveSetMips64R5() override;
  void emitDirectiveSetMips64R6() override;
  void emitDirectiveSetDsp() override;
  void emitDirectiveSetDspr2() override;
  void emitDirectiveSetNoDsp() override;
  void emitDirectiveSetMips3D() override;
  void emitDirectiveSetNoMips3D() override;
  void emitDirectiveSetPop() override;
  void emitDirectiveSetPush() override;
  void emitDirectiveSetSoftFloat() override;
  void emitDirectiveSetHardFloat() override;
 
  // PIC support
  void emitDirectiveCpAdd(MCRegister Reg) override;
  void emitDirectiveCpLoad(MCRegister Reg) override;
  void emitDirectiveCpLocal(MCRegister Reg) override;
 
  /// Emit a .cprestore directive.  If the offset is out of range then it will
  /// be synthesized using the assembler temporary.
  ///
  /// GetATReg() is a callback that can be used to obtain the current assembler
  /// temporary and is only called when the assembler temporary is required. It
  /// must handle the case where no assembler temporary is available (typically
  /// by reporting an error).
  bool emitDirectiveCpRestore(int Offset, function_ref<MCRegister()> GetATReg,
                              SMLoc IDLoc, const MCSubtargetInfo *STI) override;
  void emitDirectiveCpsetup(MCRegister Reg, int RegOrOffset,
                            const MCSymbol &Sym, bool IsReg) override;
  void emitDirectiveCpreturn(unsigned SaveLocation,
                             bool SaveLocationIsRegister) override;
 
  // FP abiflags directives
  void emitDirectiveModuleFP() override;
  void emitDirectiveModuleOddSPReg() override;
  void emitDirectiveModuleSoftFloat() override;
  void emitDirectiveModuleHardFloat() override;
  void emitDirectiveModuleMT() override;
  void emitDirectiveModuleCRC() override;
  void emitDirectiveModuleNoCRC() override;
  void emitDirectiveModuleVirt() override;
  void emitDirectiveModuleNoVirt() override;
  void emitDirectiveModuleGINV() override;
  void emitDirectiveModuleNoGINV() override;
  void emitDirectiveSetFp(MipsABIFlagsSection::FpABIKind Value) override;
  void emitDirectiveSetOddSPReg() override;
  void emitDirectiveSetNoOddSPReg() override;
};
 
// This part is for ELF object output
class MipsTargetELFStreamer : public MipsTargetStreamer {
  enum class ISAMode { Standard, MicroMips, Mips16 };
  static ISAMode getISAMode(const MCSubtargetInfo &STI);
 
  const MipsMCOptions &CLOpts;
  ISAMode Mode;
  SmallVector<ISAMode, 4> ModeStack;
  const MCSubtargetInfo &STI;
  bool Pic;
 
public:
  bool isMicroMipsEnabled() const { return Mode == ISAMode::MicroMips; }
  bool isMips16Enabled() const { return Mode == ISAMode::Mips16; }
  MCELFStreamer &getStreamer();
  MipsTargetELFStreamer(MCStreamer &S, const MCSubtargetInfo &STI);
 
  void setPic(bool Value) override { Pic = Value; }
 
  void emitLabel(MCSymbol *Symbol) override;
  void emitAssignment(MCSymbol *Symbol, const MCExpr *Value) override;
  void finish() override;
 
  void emitGPRel32Value(const MCExpr *) override;
  void emitGPRel64Value(const MCExpr *) override;
  void emitDTPRel32Value(const MCExpr *) override;
  void emitDTPRel64Value(const MCExpr *) override;
  void emitTPRel32Value(const MCExpr *) override;
  void emitTPRel64Value(const MCExpr *) override;
 
  void emitDirectiveSetMicroMips() override;
  void emitDirectiveSetNoMicroMips() override;
  void emitDirectiveSetPush() override;
  void emitDirectiveSetPop() override;
  void emitDirectiveSetMips0() override;
  void setUsesMicroMips() override;
  void emitDirectiveSetMips16() override;
  void emitDirectiveSetNoMips16() override;
 
  void emitDirectiveSetNoReorder() override;
  void emitDirectiveEnd(StringRef Name) override;
 
  void emitDirectiveEnt(const MCSymbol &Symbol) override;
  void emitDirectiveAbiCalls() override;
  void emitDirectiveNaN2008() override;
  void emitDirectiveNaNLegacy() override;
  void emitDirectiveOptionPic0() override;
  void emitDirectiveOptionPic2() override;
  void emitDirectiveInsn() override;
  void emitFrame(MCRegister StackReg, unsigned StackSize,
                 MCRegister ReturnReg) override;
  void emitMask(unsigned CPUBitmask, int CPUTopSavedRegOff) override;
  void emitFMask(unsigned FPUBitmask, int FPUTopSavedRegOff) override;
 
  // PIC support
  void emitDirectiveCpAdd(MCRegister Reg) override;
  void emitDirectiveCpLoad(MCRegister Reg) override;
  void emitDirectiveCpLocal(MCRegister Reg) override;
  bool emitDirectiveCpRestore(int Offset, function_ref<MCRegister()> GetATReg,
                              SMLoc IDLoc, const MCSubtargetInfo *STI) override;
  void emitDirectiveCpsetup(MCRegister Reg, int RegOrOffset,
                            const MCSymbol &Sym, bool IsReg) override;
  void emitDirectiveCpreturn(unsigned SaveLocation,
                             bool SaveLocationIsRegister) override;
 
  void emitMipsAbiFlags();
};
}
#endif