+//===-- MipsASMBackend.cpp - ---------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the MipsAsmBackend and MipsELFObjectWriter classes.
+//
+//===----------------------------------------------------------------------===//
+//
+
+#include "MipsFixupKinds.h"
#include "MCTargetDesc/MipsMCTargetDesc.h"
#include "llvm/ADT/Twine.h"
+#include "llvm/MC/MCAsmBackend.h"
#include "llvm/MC/MCAssembler.h"
#include "llvm/MC/MCDirectives.h"
#include "llvm/MC/MCELFObjectWriter.h"
#include "llvm/MC/MCObjectWriter.h"
#include "llvm/MC/MCSectionELF.h"
#include "llvm/MC/MCSectionMachO.h"
-#include "llvm/MC/MCAsmBackend.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/Object/MachOFormat.h"
#include "llvm/Support/ELF.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
+static unsigned adjustFixupValue(unsigned Kind, uint64_t Value) {
+
+ // Add/subtract and shift
+ switch (Kind) {
+ default:
+ break;
+ case Mips::fixup_Mips_PC16:
+ // So far we are only using this type for branches.
+ // For branches we start 1 instruction after the branch
+ // so the displacement will be one instruction size less.
+ Value -= 4;
+ // The displacement is then divided by 4 to give us an 18 bit
+ // address range.
+ Value >>= 2;
+ break;
+ case Mips::fixup_Mips_26:
+ // So far we are only using this type for jumps.
+ // The displacement is then divided by 4 to give us an 28 bit
+ // address range.
+ Value >>= 2;
+ break;
+ }
+
+ // Mask off value for placement as an operand
+ switch (Kind) {
+ default:
+ break;
+ case FK_Data_4:
+ Value &= 0xffffffff;
+ break;
+ case Mips::fixup_Mips_26:
+ Value &= 0x03ffffff;
+ break;
+ case Mips::fixup_Mips_LO16:
+ case Mips::fixup_Mips_PC16:
+ Value &= 0x0000ffff;
+ break;
+ }
+
+ return Value;
+}
+
namespace {
+
class MipsELFObjectWriter : public MCELFObjectTargetWriter {
public:
MipsELFObjectWriter(bool is64Bit, Triple::OSType OSType, uint16_t EMachine,
class MipsAsmBackend : public MCAsmBackend {
public:
- MipsAsmBackend(const Target &T)
- : MCAsmBackend() {}
-
- unsigned getNumFixupKinds() const {
- return 1; //tbd
- }
+ MipsAsmBackend(const Target &T) : MCAsmBackend() {}
/// ApplyFixup - Apply the \arg Value for given \arg Fixup into the provided
/// data fragment, at the offset specified by the fixup and following the
/// fixup kind as appropriate.
void ApplyFixup(const MCFixup &Fixup, char *Data, unsigned DataSize,
uint64_t Value) const {
+ unsigned Kind = (unsigned)Fixup.getKind();
+ Value = adjustFixupValue(Kind, Value);
+
+ if (!Value)
+ return; // Doesn't change encoding.
+
+ unsigned Offset = Fixup.getOffset();
+ switch (Kind) {
+ default:
+ llvm_unreachable("Unknown fixup kind!");
+ case Mips::fixup_Mips_GOT16: // This will be fixed up at link time
+ break;
+ case FK_Data_4:
+ case Mips::fixup_Mips_26:
+ case Mips::fixup_Mips_LO16:
+ case Mips::fixup_Mips_PC16:
+ // For each byte of the fragment that the fixup touches, mask i
+ // the fixup value. The Value has been "split up" into the appr
+ // bitfields above.
+ for (unsigned i = 0; i != 4; ++i) // FIXME - Need to support 2 and 8 bytes
+ Data[Offset + i] |= uint8_t((Value >> (i * 8)) & 0xff);
+ break;
+ }
+ }
+
+ unsigned getNumFixupKinds() const { return Mips::NumTargetFixupKinds; }
+
+ const MCFixupKindInfo &getFixupKindInfo(MCFixupKind Kind) const {
+ const static MCFixupKindInfo Infos[Mips::NumTargetFixupKinds] = {
+ // This table *must* be in the order that the fixup_* kinds a
+ // MipsFixupKinds.h.
+ //
+ // name offset bits flags
+ { "fixup_Mips_NONE", 0, 0, 0 },
+ { "fixup_Mips_16", 0, 16, 0 },
+ { "fixup_Mips_32", 0, 32, 0 },
+ { "fixup_Mips_REL32", 0, 32, 0 },
+ { "fixup_Mips_26", 0, 26, 0 },
+ { "fixup_Mips_HI16", 0, 16, 0 },
+ { "fixup_Mips_LO16", 0, 16, 0 },
+ { "fixup_Mips_GPREL16", 0, 16, 0 },
+ { "fixup_Mips_LITERAL", 0, 16, 0 },
+ { "fixup_Mips_GOT16", 0, 16, 0 },
+ { "fixup_Mips_PC16", 0, 16, MCFixupKindInfo::FKF_IsPCRel },
+ { "fixup_Mips_CALL16", 0, 16, 0 },
+ { "fixup_Mips_GPREL32", 0, 32, 0 },
+ { "fixup_Mips_SHIFT5", 6, 5, 0 },
+ { "fixup_Mips_SHIFT6", 6, 5, 0 },
+ { "fixup_Mips_64", 0, 64, 0 },
+ { "fixup_Mips_TLSGD", 0, 16, 0 },
+ { "fixup_Mips_GOTTPREL", 0, 16, 0 },
+ { "fixup_Mips_TPREL_HI", 0, 16, 0 },
+ { "fixup_Mips_TPREL_LO", 0, 16, 0 },
+ { "fixup_Mips_Branch_PCRel", 0, 16, MCFixupKindInfo::FKF_IsPCRel }
+ };
+
+ if (Kind < FirstTargetFixupKind)
+ return MCAsmBackend::getFixupKindInfo(Kind);
+
+ assert(unsigned(Kind - FirstTargetFixupKind) < getNumFixupKinds() &&
+ "Invalid kind!");
+ return Infos[Kind - FirstTargetFixupKind];
}
/// @name Target Relaxation Interfaces
return false;
}
- /// RelaxInstruction - Relax the instruction in the given fragment to the next
- /// wider instruction.
+ /// RelaxInstruction - Relax the instruction in the given fragment
+ /// to the next wider instruction.
///
- /// \param Inst - The instruction to relax, which may be the same as the
- /// output.
+ /// \param Inst - The instruction to relax, which may be the same
+ /// as the output.
/// \parm Res [output] - On return, the relaxed instruction.
void RelaxInstruction(const MCInst &Inst, MCInst &Res) const {
}
/// @}
- /// WriteNopData - Write an (optimal) nop sequence of Count bytes to the given
- /// output. If the target cannot generate such a sequence, it should return an
- /// error.
+ /// WriteNopData - Write an (optimal) nop sequence of Count bytes
+ /// to the given output. If the target cannot generate such a sequence,
+ /// it should return an error.
///
/// \return - True on success.
bool WriteNopData(uint64_t Count, MCObjectWriter *OW) const {
- return false;
+ return true;
}
};
return new MipsELFObjectWriter(false, OSType, ELF::EM_MIPS, false);
}
};
-}
+} // namespace
MCAsmBackend *llvm::createMipsAsmBackend(const Target &T, StringRef TT) {
Triple TheTriple(TT);
#include "llvm/Support/ErrorHandling.h"
namespace llvm {
+
+/// MipsII - This namespace holds all of the target specific flags that
+/// instruction info tracks.
+///
+namespace MipsII {
+ /// Target Operand Flag enum.
+ enum TOF {
+ //===------------------------------------------------------------------===//
+ // Mips Specific MachineOperand flags.
+
+ MO_NO_FLAG,
+
+ /// MO_GOT - Represents the offset into the global offset table at which
+ /// the address the relocation entry symbol resides during execution.
+ MO_GOT,
+
+ /// MO_GOT_CALL - Represents the offset into the global offset table at
+ /// which the address of a call site relocation entry symbol resides
+ /// during execution. This is different from the above since this flag
+ /// can only be present in call instructions.
+ MO_GOT_CALL,
+
+ /// MO_GPREL - Represents the offset from the current gp value to be used
+ /// for the relocatable object file being produced.
+ MO_GPREL,
+
+ /// MO_ABS_HI/LO - Represents the hi or low part of an absolute symbol
+ /// address.
+ MO_ABS_HI,
+ MO_ABS_LO,
+
+ /// MO_TLSGD - Represents the offset into the global offset table at which
+ // the module ID and TSL block offset reside during execution (General
+ // Dynamic TLS).
+ MO_TLSGD,
+
+ /// MO_GOTTPREL - Represents the offset from the thread pointer (Initial
+ // Exec TLS).
+ MO_GOTTPREL,
+
+ /// MO_TPREL_HI/LO - Represents the hi and low part of the offset from
+ // the thread pointer (Local Exec TLS).
+ MO_TPREL_HI,
+ MO_TPREL_LO,
+
+ // N32/64 Flags.
+ MO_GPOFF_HI,
+ MO_GPOFF_LO,
+ MO_GOT_DISP,
+ MO_GOT_PAGE,
+ MO_GOT_OFST
+ };
+
+ enum {
+ //===------------------------------------------------------------------===//
+ // Instruction encodings. These are the standard/most common forms for
+ // Mips instructions.
+ //
+
+ // Pseudo - This represents an instruction that is a pseudo instruction
+ // or one that has not been implemented yet. It is illegal to code generate
+ // it, but tolerated for intermediate implementation stages.
+ Pseudo = 0,
+
+ /// FrmR - This form is for instructions of the format R.
+ FrmR = 1,
+ /// FrmI - This form is for instructions of the format I.
+ FrmI = 2,
+ /// FrmJ - This form is for instructions of the format J.
+ FrmJ = 3,
+ /// FrmFR - This form is for instructions of the format FR.
+ FrmFR = 4,
+ /// FrmFI - This form is for instructions of the format FI.
+ FrmFI = 5,
+ /// FrmOther - This form is for instructions that have no specific format.
+ FrmOther = 6,
+
+ FormMask = 15
+ };
+}
+
+
/// getMipsRegisterNumbering - Given the enum value for some register,
/// return the number that it corresponds to.
inline static unsigned getMipsRegisterNumbering(unsigned RegEnum)
//===----------------------------------------------------------------------===//
//
#define DEBUG_TYPE "mccodeemitter"
+#include "MCTargetDesc/MipsBaseInfo.h"
+#include "MCTargetDesc/MipsFixupKinds.h"
+#include "MCTargetDesc/MipsMCTargetDesc.h"
+#include "llvm/ADT/APFloat.h"
+#include "llvm/ADT/Statistic.h"
#include "llvm/MC/MCCodeEmitter.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCSubtargetInfo.h"
-#include "llvm/ADT/APFloat.h"
-#include "llvm/ADT/Statistic.h"
#include "llvm/Support/raw_ostream.h"
-#include "MCTargetDesc/MipsMCTargetDesc.h"
using namespace llvm;
void operator=(const MipsMCCodeEmitter &); // DO NOT IMPLEMENT
const MCInstrInfo &MCII;
const MCSubtargetInfo &STI;
+ MCContext &Ctx;
public:
MipsMCCodeEmitter(const MCInstrInfo &mcii, const MCSubtargetInfo &sti,
- MCContext &ctx)
- : MCII(mcii), STI(sti) {}
+ MCContext &ctx) : MCII(mcii), STI(sti) , Ctx(ctx) {}
~MipsMCCodeEmitter() {}
- void EncodeInstruction(const MCInst &MI, raw_ostream &OS,
- SmallVectorImpl<MCFixup> &Fixups) const {
+ void EmitByte(unsigned char C, raw_ostream &OS) const {
+ OS << (char)C;
+ }
+
+ void EmitInstruction(uint64_t Val, unsigned Size, raw_ostream &OS) const {
+ // Output the instruction encoding in little endian byte order.
+ for (unsigned i = 0; i != Size; ++i) {
+ EmitByte(Val & 255, OS);
+ Val >>= 8;
+ }
}
+
+ void EncodeInstruction(const MCInst &MI, raw_ostream &OS,
+ SmallVectorImpl<MCFixup> &Fixups) const;
+
+ // getBinaryCodeForInstr - TableGen'erated function for getting the
+ // binary encoding for an instruction.
+ unsigned getBinaryCodeForInstr(const MCInst &MI,
+ SmallVectorImpl<MCFixup> &Fixups) const;
+
+ // getBranchJumpOpValue - Return binary encoding of the jump
+ // target operand. If the machine operand requires relocation,
+ // record the relocation and return zero.
+ unsigned getJumpTargetOpValue(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups) const;
+
+ // getBranchTargetOpValue - Return binary encoding of the branch
+ // target operand. If the machine operand requires relocation,
+ // record the relocation and return zero.
+ unsigned getBranchTargetOpValue(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups) const;
+
+ // getMachineOpValue - Return binary encoding of operand. If the machin
+ // operand requires relocation, record the relocation and return zero.
+ unsigned getMachineOpValue(const MCInst &MI,const MCOperand &MO,
+ SmallVectorImpl<MCFixup> &Fixups) const;
+
+ unsigned getMemEncoding(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups) const;
+ unsigned getSizeExtEncoding(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups) const;
+ unsigned getSizeInsEncoding(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups) const;
+
}; // class MipsMCCodeEmitter
} // namespace
MCCodeEmitter *llvm::createMipsMCCodeEmitter(const MCInstrInfo &MCII,
const MCSubtargetInfo &STI,
- MCContext &Ctx) {
+ MCContext &Ctx)
+{
return new MipsMCCodeEmitter(MCII, STI, Ctx);
}
+
+/// EncodeInstruction - Emit the instruction.
+/// Size the instruction (currently only 4 bytes
+void MipsMCCodeEmitter::
+EncodeInstruction(const MCInst &MI, raw_ostream &OS,
+ SmallVectorImpl<MCFixup> &Fixups) const
+{
+ uint32_t Binary = getBinaryCodeForInstr(MI, Fixups);
+
+ // Check for unimplemented opcodes.
+ // Unfortunately in MIPS both NOT and SLL will come in with Binary == 0
+ // so we have to special check for them.
+ unsigned Opcode = MI.getOpcode();
+ if ((Opcode != Mips::NOP) && (Opcode != Mips::SLL) && !Binary)
+ llvm_unreachable("unimplemented opcode in EncodeInstruction()");
+
+ const MCInstrDesc &Desc = MCII.get(MI.getOpcode());
+ uint64_t TSFlags = Desc.TSFlags;
+
+ // Pseudo instructions don't get encoded and shouldn't be here
+ // in the first place!
+ if ((TSFlags & MipsII::FormMask) == MipsII::Pseudo)
+ llvm_unreachable("Pseudo opcode found in EncodeInstruction()");
+
+ // For now all instructions are 4 bytes
+ int Size = 4; // FIXME: Have Desc.getSize() return the correct value!
+
+ EmitInstruction(Binary, Size, OS);
+}
+
+/// getBranchTargetOpValue - Return binary encoding of the branch
+/// target operand. If the machine operand requires relocation,
+/// record the relocation and return zero.
+unsigned MipsMCCodeEmitter::
+getBranchTargetOpValue(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups) const {
+
+ const MCOperand &MO = MI.getOperand(OpNo);
+ assert(MO.isExpr() && "getBranchTargetOpValue expects only expressions");
+
+ const MCExpr *Expr = MO.getExpr();
+ Fixups.push_back(MCFixup::Create(0, Expr,
+ MCFixupKind(Mips::fixup_Mips_PC16)));
+ return 0;
+}
+
+/// getJumpTargetOpValue - Return binary encoding of the jump
+/// target operand. If the machine operand requires relocation,
+/// record the relocation and return zero.
+unsigned MipsMCCodeEmitter::
+getJumpTargetOpValue(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups) const {
+
+ const MCOperand &MO = MI.getOperand(OpNo);
+ assert(MO.isExpr() && "getJumpTargetOpValue expects only expressions");
+
+ const MCExpr *Expr = MO.getExpr();
+ Fixups.push_back(MCFixup::Create(0, Expr,
+ MCFixupKind(Mips::fixup_Mips_26)));
+ return 0;
+}
+
+/// getMachineOpValue - Return binary encoding of operand. If the machine
+/// operand requires relocation, record the relocation and return zero.
+unsigned MipsMCCodeEmitter::
+getMachineOpValue(const MCInst &MI, const MCOperand &MO,
+ SmallVectorImpl<MCFixup> &Fixups) const {
+ if (MO.isReg()) {
+ unsigned Reg = MO.getReg();
+ unsigned RegNo = getMipsRegisterNumbering(Reg);
+ return RegNo;
+ } else if (MO.isImm()) {
+ return static_cast<unsigned>(MO.getImm());
+ } else if (MO.isFPImm()) {
+ return static_cast<unsigned>(APFloat(MO.getFPImm())
+ .bitcastToAPInt().getHiBits(32).getLimitedValue());
+ } else if (MO.isExpr()) {
+ const MCExpr *Expr = MO.getExpr();
+ MCExpr::ExprKind Kind = Expr->getKind();
+ if (Kind == MCExpr::SymbolRef) {
+ Mips::Fixups FixupKind = Mips::fixup_Mips_NONE;
+ MCSymbolRefExpr::VariantKind SymRefKind =
+ cast<MCSymbolRefExpr>(Expr)->getKind();
+ switch(SymRefKind) {
+ case MCSymbolRefExpr::VK_Mips_GPREL:
+ FixupKind = Mips::fixup_Mips_GPREL16;
+ break;
+ case MCSymbolRefExpr::VK_Mips_GOT_CALL:
+ FixupKind = Mips::fixup_Mips_CALL16;
+ break;
+ case MCSymbolRefExpr::VK_Mips_GOT:
+ FixupKind = Mips::fixup_Mips_GOT16;
+ break;
+ case MCSymbolRefExpr::VK_Mips_ABS_HI:
+ FixupKind = Mips::fixup_Mips_HI16;
+ break;
+ case MCSymbolRefExpr::VK_Mips_ABS_LO:
+ FixupKind = Mips::fixup_Mips_LO16;
+ break;
+ case MCSymbolRefExpr::VK_Mips_TLSGD:
+ FixupKind = Mips::fixup_Mips_TLSGD;
+ break;
+ case MCSymbolRefExpr::VK_Mips_GOTTPREL:
+ FixupKind = Mips::fixup_Mips_GOTTPREL;
+ break;
+ case MCSymbolRefExpr::VK_Mips_TPREL_HI:
+ FixupKind = Mips::fixup_Mips_TPREL_HI;
+ break;
+ case MCSymbolRefExpr::VK_Mips_TPREL_LO:
+ FixupKind = Mips::fixup_Mips_TPREL_LO;
+ break;
+ default:
+ return 0;
+ } // switch
+ Fixups.push_back(MCFixup::Create(0, Expr, MCFixupKind(FixupKind)));
+ } // if SymbolRef
+ // All of the information is in the fixup.
+ return 0;
+ }
+ llvm_unreachable("Unable to encode MCOperand!");
+ // Not reached
+ return 0;
+}
+
+/// getMemEncoding - Return binary encoding of memory related operand.
+/// If the offset operand requires relocation, record the relocation.
+unsigned
+MipsMCCodeEmitter::getMemEncoding(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups) const {
+ // Base register is encoded in bits 20-16, offset is encoded in bits 15-0.
+ assert(MI.getOperand(OpNo).isReg());
+ unsigned RegBits = getMachineOpValue(MI, MI.getOperand(OpNo),Fixups) << 16;
+ unsigned OffBits = getMachineOpValue(MI, MI.getOperand(OpNo+1), Fixups);
+
+ return (OffBits & 0xFFFF) | RegBits;
+}
+
+unsigned
+MipsMCCodeEmitter::getSizeExtEncoding(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups) const {
+ // FIXME: implement
+ return 0;
+}
+
+unsigned
+MipsMCCodeEmitter::getSizeInsEncoding(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups) const {
+ // FIXME: implement
+ return 0;
+}
+
+#include "MipsGenMCCodeEmitter.inc"
+
//
//===----------------------------------------------------------------------===//
-#include "MipsMCTargetDesc.h"
#include "MipsMCAsmInfo.h"
+#include "MipsMCTargetDesc.h"
#include "InstPrinter/MipsInstPrinter.h"
#include "llvm/MC/MachineLocation.h"
#include "llvm/MC/MCCodeGenInfo.h"
TargetRegistry::RegisterMCAsmBackend(TheMips64Target, createMipsAsmBackend);
TargetRegistry::RegisterMCAsmBackend(TheMips64elTarget, createMipsAsmBackend);
+ TargetRegistry::RegisterMCCodeEmitter(TheMipsTarget, createMipsMCCodeEmitter);
+ TargetRegistry::RegisterMCCodeEmitter(TheMipselTarget, createMipsMCCodeEmitter);
+
// Register the MC subtarget info.
TargetRegistry::RegisterMCSubtargetInfo(TheMipsTarget,
createMipsMCSubtargetInfo);
namespace llvm {
class MCAsmBackend;
-class MCInstrInfo;
class MCCodeEmitter;
class MCContext;
+class MCInstrInfo;
+class MCObjectWriter;
class MCSubtargetInfo;
class StringRef;
class Target;
+class raw_ostream;
extern Target TheMipsTarget;
extern Target TheMipselTarget;
MCContext &Ctx);
MCAsmBackend *createMipsAsmBackend(const Target &T, StringRef TT);
+
} // End llvm namespace
// Defines symbolic names for Mips registers. This defines a mapping from
BUILT_SOURCES = MipsGenRegisterInfo.inc MipsGenInstrInfo.inc \
MipsGenAsmWriter.inc MipsGenCodeEmitter.inc \
MipsGenDAGISel.inc MipsGenCallingConv.inc \
- MipsGenSubtargetInfo.inc
+ MipsGenSubtargetInfo.inc MipsGenMCCodeEmitter.inc
DIRS = InstPrinter TargetInfo MCTargetDesc
#include "MipsMCInstLower.h"
#include "MipsMCSymbolRefExpr.h"
#include "InstPrinter/MipsInstPrinter.h"
+#include "MCTargetDesc/MipsBaseInfo.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/Twine.h"
#include "MipsRelocations.h"
#include "MipsSubtarget.h"
#include "MipsTargetMachine.h"
-#include "llvm/Constants.h"
-#include "llvm/DerivedTypes.h"
-#include "llvm/Function.h"
-#include "llvm/PassManager.h"
+#include "MCTargetDesc/MipsBaseInfo.h"
+#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/JITCodeEmitter.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
+#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/Passes.h"
-#include "llvm/ADT/Statistic.h"
+#include "llvm/Constants.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Function.h"
+#include "llvm/PassManager.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include <iomanip>
#endif
-#include "llvm/CodeGen/MachineOperand.h"
-
using namespace llvm;
STATISTIC(NumEmitted, "Number of machine instructions emitted");
public:
MipsCodeEmitter(TargetMachine &tm, JITCodeEmitter &mce) :
MachineFunctionPass(ID), JTI(0),
- II((const MipsInstrInfo *) tm.getInstrInfo()),
- TD(tm.getTargetData()), TM(tm), MCE(mce), MCPEs(0), MJTEs(0),
- IsPIC(TM.getRelocationModel() == Reloc::PIC_) {
+ II((const MipsInstrInfo *) tm.getInstrInfo()),
+ TD(tm.getTargetData()), TM(tm), MCE(mce), MCPEs(0), MJTEs(0),
+ IsPIC(TM.getRelocationModel() == Reloc::PIC_) {
}
bool runOnMachineFunction(MachineFunction &MF);
/// Routines that handle operands which add machine relocations which are
/// fixed up by the relocation stage.
void emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
- bool MayNeedFarStub) const;
+ bool MayNeedFarStub) const;
void emitExternalSymbolAddress(const char *ES, unsigned Reloc) const;
void emitConstPoolAddress(unsigned CPI, unsigned Reloc) const;
void emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const;
unsigned getRelocation(const MachineInstr &MI,
const MachineOperand &MO) const;
+ unsigned getJumpTargetOpValue(const MachineInstr &MI, unsigned OpNo) const;
+
+ unsigned getBranchTargetOpValue(const MachineInstr &MI, unsigned OpNo) const;
unsigned getMemEncoding(const MachineInstr &MI, unsigned OpNo) const;
unsigned getSizeExtEncoding(const MachineInstr &MI, unsigned OpNo) const;
unsigned getSizeInsEncoding(const MachineInstr &MI, unsigned OpNo) const;
return Mips::reloc_mips_lo;
}
+unsigned MipsCodeEmitter::getJumpTargetOpValue(const MachineInstr &MI,
+ unsigned OpNo) const {
+ // FIXME: implement
+ return 0;
+}
+
+unsigned MipsCodeEmitter::getBranchTargetOpValue(const MachineInstr &MI,
+ unsigned OpNo) const {
+ // FIXME: implement
+ return 0;
+}
+
unsigned MipsCodeEmitter::getMemEncoding(const MachineInstr &MI,
- unsigned OpNo) const {
+ unsigned OpNo) const {
// Base register is encoded in bits 20-16, offset is encoded in bits 15-0.
assert(MI.getOperand(OpNo).isReg());
unsigned RegBits = getMachineOpValue(MI, MI.getOperand(OpNo)) << 16;
- return
- (getMachineOpValue(MI, MI.getOperand(OpNo+1)) & 0xFFFF) | RegBits;
+ return (getMachineOpValue(MI, MI.getOperand(OpNo+1)) & 0xFFFF) | RegBits;
}
unsigned MipsCodeEmitter::getSizeExtEncoding(const MachineInstr &MI,
- unsigned OpNo) const {
+ unsigned OpNo) const {
// size is encoded as size-1.
return getMachineOpValue(MI, MI.getOperand(OpNo)) - 1;
}
unsigned MipsCodeEmitter::getSizeInsEncoding(const MachineInstr &MI,
- unsigned OpNo) const {
+ unsigned OpNo) const {
// size is encoded as pos+size-1.
return getMachineOpValue(MI, MI.getOperand(OpNo-1)) +
getMachineOpValue(MI, MI.getOperand(OpNo)) - 1;
/// getMachineOpValue - Return binary encoding of operand. If the machine
/// operand requires relocation, record the relocation and return zero.
unsigned MipsCodeEmitter::getMachineOpValue(const MachineInstr &MI,
- const MachineOperand &MO) const {
+ const MachineOperand &MO) const {
if (MO.isReg())
return MipsRegisterInfo::getRegisterNumbering(MO.getReg());
else if (MO.isImm())
}
void MipsCodeEmitter::emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
- bool MayNeedFarStub) const {
+ bool MayNeedFarStub) const {
MCE.addRelocation(MachineRelocation::getGV(MCE.getCurrentPCOffset(), Reloc,
- const_cast<GlobalValue *>(GV), 0, MayNeedFarStub));
+ const_cast<GlobalValue *>(GV), 0,
+ MayNeedFarStub));
}
void MipsCodeEmitter::emitGlobalAddressUnaligned(const GlobalValue *GV,
}
void MipsCodeEmitter::emitMachineBasicBlock(MachineBasicBlock *BB,
- unsigned Reloc) const {
+ unsigned Reloc) const {
MCE.addRelocation(MachineRelocation::getBB(MCE.getCurrentPCOffset(),
Reloc, BB));
}
/// createMipsJITCodeEmitterPass - Return a pass that emits the collected Mips
/// code to the specified MCE object.
FunctionPass *llvm::createMipsJITCodeEmitterPass(MipsTargetMachine &TM,
- JITCodeEmitter &JCE) {
+ JITCodeEmitter &JCE) {
return new MipsCodeEmitter(TM, JCE);
}
#include "MipsFrameLowering.h"
#include "MipsInstrInfo.h"
#include "MipsMachineFunction.h"
+#include "MCTargetDesc/MipsBaseInfo.h"
#include "llvm/Function.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/Intrinsics.h"
#include "llvm/CallingConv.h"
#include "InstPrinter/MipsInstPrinter.h"
+#include "MCTargetDesc/MipsBaseInfo.h"
#include "llvm/CodeGen/CallingConvLower.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
unsigned GetOppositeBranchOpc(unsigned Opc);
}
-/// MipsII - This namespace holds all of the target specific flags that
-/// instruction info tracks.
-///
-namespace MipsII {
- /// Target Operand Flag enum.
- enum TOF {
- //===------------------------------------------------------------------===//
- // Mips Specific MachineOperand flags.
-
- MO_NO_FLAG,
-
- /// MO_GOT - Represents the offset into the global offset table at which
- /// the address the relocation entry symbol resides during execution.
- MO_GOT,
-
- /// MO_GOT_CALL - Represents the offset into the global offset table at
- /// which the address of a call site relocation entry symbol resides
- /// during execution. This is different from the above since this flag
- /// can only be present in call instructions.
- MO_GOT_CALL,
-
- /// MO_GPREL - Represents the offset from the current gp value to be used
- /// for the relocatable object file being produced.
- MO_GPREL,
-
- /// MO_ABS_HI/LO - Represents the hi or low part of an absolute symbol
- /// address.
- MO_ABS_HI,
- MO_ABS_LO,
-
- /// MO_TLSGD - Represents the offset into the global offset table at which
- // the module ID and TSL block offset reside during execution (General
- // Dynamic TLS).
- MO_TLSGD,
-
- /// MO_GOTTPREL - Represents the offset from the thread pointer (Initial
- // Exec TLS).
- MO_GOTTPREL,
-
- /// MO_TPREL_HI/LO - Represents the hi and low part of the offset from
- // the thread pointer (Local Exec TLS).
- MO_TPREL_HI,
- MO_TPREL_LO,
-
- // N32/64 Flags.
- MO_GPOFF_HI,
- MO_GPOFF_LO,
- MO_GOT_DISP,
- MO_GOT_PAGE,
- MO_GOT_OFST
- };
-
- enum {
- //===------------------------------------------------------------------===//
- // Instruction encodings. These are the standard/most common forms for
- // Mips instructions.
- //
-
- // Pseudo - This represents an instruction that is a pseudo instruction
- // or one that has not been implemented yet. It is illegal to code generate
- // it, but tolerated for intermediate implementation stages.
- Pseudo = 0,
-
- /// FrmR - This form is for instructions of the format R.
- FrmR = 1,
- /// FrmI - This form is for instructions of the format I.
- FrmI = 2,
- /// FrmJ - This form is for instructions of the format J.
- FrmJ = 3,
- /// FrmFR - This form is for instructions of the format FR.
- FrmFR = 4,
- /// FrmFI - This form is for instructions of the format FI.
- FrmFI = 5,
- /// FrmOther - This form is for instructions that have no specific format.
- FrmOther = 6,
-
- FormMask = 15
- };
-}
-
class MipsInstrInfo : public MipsGenInstrInfo {
MipsTargetMachine &TM;
bool IsN64;
//===----------------------------------------------------------------------===//
// Instruction operand types
-def brtarget : Operand<OtherVT>;
+def jmptarget : Operand<OtherVT> {
+ let EncoderMethod = "getJumpTargetOpValue";
+}
+def brtarget : Operand<OtherVT> {
+ let EncoderMethod = "getBranchTargetOpValue";
+ let OperandType = "OPERAND_PCREL";
+}
def calltarget : Operand<i32>;
def calltarget64: Operand<i64>;
def simm16 : Operand<i32>;
// Unconditional branch
let isBranch=1, isTerminator=1, isBarrier=1, hasDelaySlot = 1 in
class JumpFJ<bits<6> op, string instr_asm>:
- FJ<op, (outs), (ins brtarget:$target),
+ FJ<op, (outs), (ins jmptarget:$target),
!strconcat(instr_asm, "\t$target"), [(br bb:$target)], IIBranch>;
let isBranch=1, isTerminator=1, isBarrier=1, rd=0, hasDelaySlot = 1 in
#include "MipsAsmPrinter.h"
#include "MipsInstrInfo.h"
#include "MipsMCInstLower.h"
+#include "MCTargetDesc/MipsBaseInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineOperand.h"
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