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Teach ARM Target to use the tblgen support for generating an MC'ized

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CodeEmitter.

llvm-svn: 118209
This commit is contained in:
Jim Grosbach 2010-11-03 23:52:49 +00:00
parent e89ee5eb80
commit af6104d4bf
3 changed files with 64 additions and 47 deletions
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108
lib/Target/ARM/ARMMCCodeEmitter.cpp
View File

@ -43,31 +43,38 @@ public:
// getBinaryCodeForInstr - TableGen'erated function for getting the
// binary encoding for an instruction.
unsigned getBinaryCodeForInstr(const MCInst &MI) const;
unsigned getBinaryCodeForInstr(const MCInst &MI,
SmallVectorImpl<MCFixup> &Fixups) const;
/// getMachineOpValue - Return binary encoding of operand. If the machine
/// operand requires relocation, record the relocation and return zero.
unsigned getMachineOpValue(const MCInst &MI,const MCOperand &MO) const;
unsigned getMachineOpValue(const MCInst &MI,const MCOperand &MO,
SmallVectorImpl<MCFixup> &Fixups) const;
bool EncodeAddrModeOpValues(const MCInst &MI, unsigned OpIdx,
unsigned &Reg, unsigned &Imm) const;
unsigned &Reg, unsigned &Imm,
SmallVectorImpl<MCFixup> &Fixups) const;
/// getAddrModeImm12OpValue - Return encoding info for 'reg +/- imm12'
/// operand.
uint32_t getAddrModeImm12OpValue(const MCInst &MI, unsigned OpIdx) const;
uint32_t getAddrModeImm12OpValue(const MCInst &MI, unsigned OpIdx,
SmallVectorImpl<MCFixup> &Fixups) const;
/// getAddrMode5OpValue - Return encoding info for 'reg +/- imm8' operand.
uint32_t getAddrMode5OpValue(const MCInst &MI, unsigned OpIdx) const;
uint32_t getAddrMode5OpValue(const MCInst &MI, unsigned OpIdx,
SmallVectorImpl<MCFixup> &Fixups) const;
/// getCCOutOpValue - Return encoding of the 's' bit.
unsigned getCCOutOpValue(const MCInst &MI, unsigned Op) const {
unsigned getCCOutOpValue(const MCInst &MI, unsigned Op,
SmallVectorImpl<MCFixup> &Fixups) const {
// The operand is either reg0 or CPSR. The 's' bit is encoded as '0' or
// '1' respectively.
return MI.getOperand(Op).getReg() == ARM::CPSR;
}
/// getSOImmOpValue - Return an encoded 12-bit shifted-immediate value.
unsigned getSOImmOpValue(const MCInst &MI, unsigned Op) const {
unsigned getSOImmOpValue(const MCInst &MI, unsigned Op,
SmallVectorImpl<MCFixup> &Fixups) const {
unsigned SoImm = MI.getOperand(Op).getImm();
int SoImmVal = ARM_AM::getSOImmVal(SoImm);
assert(SoImmVal != -1 && "Not a valid so_imm value!");
@ -82,9 +89,11 @@ public:
}
/// getSORegOpValue - Return an encoded so_reg shifted register value.
unsigned getSORegOpValue(const MCInst &MI, unsigned Op) const;
unsigned getSORegOpValue(const MCInst &MI, unsigned Op,
SmallVectorImpl<MCFixup> &Fixups) const;
unsigned getRotImmOpValue(const MCInst &MI, unsigned Op) const {
unsigned getRotImmOpValue(const MCInst &MI, unsigned Op,
SmallVectorImpl<MCFixup> &Fixups) const {
switch (MI.getOperand(Op).getImm()) {
default: assert (0 && "Not a valid rot_imm value!");
case 0: return 0;
@ -94,19 +103,25 @@ public:
}
}
unsigned getImmMinusOneOpValue(const MCInst &MI, unsigned Op) const {
unsigned getImmMinusOneOpValue(const MCInst &MI, unsigned Op,
SmallVectorImpl<MCFixup> &Fixups) const {
return MI.getOperand(Op).getImm() - 1;
}
unsigned getNEONVcvtImm32OpValue(const MCInst &MI, unsigned Op) const {
unsigned getNEONVcvtImm32OpValue(const MCInst &MI, unsigned Op,
SmallVectorImpl<MCFixup> &Fixups) const {
return 64 - MI.getOperand(Op).getImm();
}
unsigned getBitfieldInvertedMaskOpValue(const MCInst &MI, unsigned Op) const;
unsigned getBitfieldInvertedMaskOpValue(const MCInst &MI, unsigned Op,
SmallVectorImpl<MCFixup> &Fixups) const;
unsigned getRegisterListOpValue(const MCInst &MI, unsigned Op) const;
unsigned getAddrMode6AddressOpValue(const MCInst &MI, unsigned Op) const;
unsigned getAddrMode6OffsetOpValue(const MCInst &MI, unsigned Op) const;
unsigned getRegisterListOpValue(const MCInst &MI, unsigned Op,
SmallVectorImpl<MCFixup> &Fixups) const;
unsigned getAddrMode6AddressOpValue(const MCInst &MI, unsigned Op,
SmallVectorImpl<MCFixup> &Fixups) const;
unsigned getAddrMode6OffsetOpValue(const MCInst &MI, unsigned Op,
SmallVectorImpl<MCFixup> &Fixups) const;
unsigned getNumFixupKinds() const {
assert(0 && "ARMMCCodeEmitter::getNumFixupKinds() not yet implemented.");
@ -146,8 +161,9 @@ MCCodeEmitter *llvm::createARMMCCodeEmitter(const Target &, TargetMachine &TM,
/// getMachineOpValue - Return binary encoding of operand. If the machine
/// operand requires relocation, record the relocation and return zero.
unsigned ARMMCCodeEmitter::getMachineOpValue(const MCInst &MI,
const MCOperand &MO) const {
unsigned ARMMCCodeEmitter::
getMachineOpValue(const MCInst &MI, const MCOperand &MO,
SmallVectorImpl<MCFixup> &Fixups) const {
if (MO.isReg()) {
unsigned Reg = MO.getReg();
unsigned RegNo = getARMRegisterNumbering(Reg);
@ -177,9 +193,9 @@ unsigned ARMMCCodeEmitter::getMachineOpValue(const MCInst &MI,
}
/// getAddrModeImmOpValue - Return encoding info for 'reg +/- imm' operand.
bool ARMMCCodeEmitter::EncodeAddrModeOpValues(const MCInst &MI, unsigned OpIdx,
unsigned &Reg,
unsigned &Imm) const {
bool ARMMCCodeEmitter::
EncodeAddrModeOpValues(const MCInst &MI, unsigned OpIdx, unsigned &Reg,
unsigned &Imm, SmallVectorImpl<MCFixup> &Fixups) const {
const MCOperand &MO = MI.getOperand(OpIdx);
const MCOperand &MO1 = MI.getOperand(OpIdx + 1);
@ -211,13 +227,14 @@ bool ARMMCCodeEmitter::EncodeAddrModeOpValues(const MCInst &MI, unsigned OpIdx,
}
/// getAddrModeImm12OpValue - Return encoding info for 'reg +/- imm12' operand.
uint32_t ARMMCCodeEmitter::getAddrModeImm12OpValue(const MCInst &MI,
unsigned OpIdx) const {
uint32_t ARMMCCodeEmitter::
getAddrModeImm12OpValue(const MCInst &MI, unsigned OpIdx,
SmallVectorImpl<MCFixup> &Fixups) const {
// {17-13} = reg
// {12} = (U)nsigned (add == '1', sub == '0')
// {11-0} = imm12
unsigned Reg, Imm12;
bool isAdd = EncodeAddrModeOpValues(MI, OpIdx, Reg, Imm12);
bool isAdd = EncodeAddrModeOpValues(MI, OpIdx, Reg, Imm12, Fixups);
if (Reg == ARM::PC)
return ARM::PC << 13; // Rn is PC;
@ -231,13 +248,14 @@ uint32_t ARMMCCodeEmitter::getAddrModeImm12OpValue(const MCInst &MI,
}
/// getAddrMode5OpValue - Return encoding info for 'reg +/- imm12' operand.
uint32_t ARMMCCodeEmitter::getAddrMode5OpValue(const MCInst &MI,
unsigned OpIdx) const {
uint32_t ARMMCCodeEmitter::
getAddrMode5OpValue(const MCInst &MI, unsigned OpIdx,
SmallVectorImpl<MCFixup> &Fixups) const {
// {12-9} = reg
// {8} = (U)nsigned (add == '1', sub == '0')
// {7-0} = imm8
unsigned Reg, Imm8;
EncodeAddrModeOpValues(MI, OpIdx, Reg, Imm8);
EncodeAddrModeOpValues(MI, OpIdx, Reg, Imm8, Fixups);
if (Reg == ARM::PC)
return ARM::PC << 9; // Rn is PC;
@ -250,8 +268,9 @@ uint32_t ARMMCCodeEmitter::getAddrMode5OpValue(const MCInst &MI,
return Binary;
}
unsigned ARMMCCodeEmitter::getSORegOpValue(const MCInst &MI,
unsigned OpIdx) const {
unsigned ARMMCCodeEmitter::
getSORegOpValue(const MCInst &MI, unsigned OpIdx,
SmallVectorImpl<MCFixup> &Fixups) const {
// Sub-operands are [reg, reg, imm]. The first register is Rm, the reg to be
// shifted. The second is either Rs, the amount to shift by, or reg0 in which
// case the imm contains the amount to shift by.
@ -321,8 +340,9 @@ unsigned ARMMCCodeEmitter::getSORegOpValue(const MCInst &MI,
return Binary | ARM_AM::getSORegOffset(MO2.getImm()) << 7;
}
unsigned ARMMCCodeEmitter::getBitfieldInvertedMaskOpValue(const MCInst &MI,
unsigned Op) const {
unsigned ARMMCCodeEmitter::
getBitfieldInvertedMaskOpValue(const MCInst &MI, unsigned Op,
SmallVectorImpl<MCFixup> &Fixups) const {
// 10 bits. lower 5 bits are are the lsb of the mask, high five bits are the
// msb of the mask.
const MCOperand &MO = MI.getOperand(Op);
@ -333,8 +353,9 @@ unsigned ARMMCCodeEmitter::getBitfieldInvertedMaskOpValue(const MCInst &MI,
return lsb | (msb << 5);
}
unsigned ARMMCCodeEmitter::getRegisterListOpValue(const MCInst &MI,
unsigned Op) const {
unsigned ARMMCCodeEmitter::
getRegisterListOpValue(const MCInst &MI, unsigned Op,
SmallVectorImpl<MCFixup> &Fixups) const {
// Convert a list of GPRs into a bitfield (R0 -> bit 0). For each
// register in the list, set the corresponding bit.
unsigned Binary = 0;
@ -345,8 +366,9 @@ unsigned ARMMCCodeEmitter::getRegisterListOpValue(const MCInst &MI,
return Binary;
}
unsigned ARMMCCodeEmitter::getAddrMode6AddressOpValue(const MCInst &MI,
unsigned Op) const {
unsigned ARMMCCodeEmitter::
getAddrMode6AddressOpValue(const MCInst &MI, unsigned Op,
SmallVectorImpl<MCFixup> &Fixups) const {
const MCOperand &Reg = MI.getOperand(Op);
const MCOperand &Imm = MI.getOperand(Op + 1);
@ -365,8 +387,9 @@ unsigned ARMMCCodeEmitter::getAddrMode6AddressOpValue(const MCInst &MI,
return RegNo | (Align << 4);
}
unsigned ARMMCCodeEmitter::getAddrMode6OffsetOpValue(const MCInst &MI,
unsigned Op) const {
unsigned ARMMCCodeEmitter::
getAddrMode6OffsetOpValue(const MCInst &MI, unsigned Op,
SmallVectorImpl<MCFixup> &Fixups) const {
const MCOperand &MO = MI.getOperand(Op);
if (MO.getReg() == 0) return 0x0D;
return MO.getReg();
@ -374,7 +397,7 @@ unsigned ARMMCCodeEmitter::getAddrMode6OffsetOpValue(const MCInst &MI,
void ARMMCCodeEmitter::
EncodeInstruction(const MCInst &MI, raw_ostream &OS,
SmallVectorImpl<MCFixup> &) const {
SmallVectorImpl<MCFixup> &Fixups) const {
// Pseudo instructions don't get encoded.
const TargetInstrDesc &Desc = TII.get(MI.getOpcode());
if ((Desc.TSFlags & ARMII::FormMask) == ARMII::Pseudo)
@ -382,15 +405,8 @@ EncodeInstruction(const MCInst &MI, raw_ostream &OS,
// Keep track of the current byte being emitted.
unsigned CurByte = 0;
EmitConstant(getBinaryCodeForInstr(MI), 4, CurByte, OS);
EmitConstant(getBinaryCodeForInstr(MI, Fixups), 4, CurByte, OS);
++MCNumEmitted; // Keep track of the # of mi's emitted.
}
// FIXME: These #defines shouldn't be necessary. Instead, tblgen should
// be able to generate code emitter helpers for either variant, like it
// does for the AsmWriter.
#define ARMCodeEmitter ARMMCCodeEmitter
#define MachineInstr MCInst
#include "ARMGenCodeEmitter.inc"
#undef ARMCodeEmitter
#undef MachineInstr
#include "ARMGenMCCodeEmitter.inc"

1
lib/Target/ARM/CMakeLists.txt
View File

@ -6,6 +6,7 @@ tablegen(ARMGenRegisterInfo.inc -gen-register-desc)
tablegen(ARMGenInstrNames.inc -gen-instr-enums)
tablegen(ARMGenInstrInfo.inc -gen-instr-desc)
tablegen(ARMGenCodeEmitter.inc -gen-emitter)
tablegen(ARMGenMCCodeEmitter.inc -gen-emitter -mc-emitter)
tablegen(ARMGenAsmWriter.inc -gen-asm-writer)
tablegen(ARMGenAsmMatcher.inc -gen-asm-matcher)
tablegen(ARMGenDAGISel.inc -gen-dag-isel)

2
lib/Target/ARM/Makefile
View File

@ -18,7 +18,7 @@ BUILT_SOURCES = ARMGenRegisterInfo.h.inc ARMGenRegisterNames.inc \
ARMGenDAGISel.inc ARMGenSubtarget.inc \
ARMGenCodeEmitter.inc ARMGenCallingConv.inc \
ARMGenDecoderTables.inc ARMGenEDInfo.inc \
ARMGenFastISel.inc
ARMGenFastISel.inc ARMGenMCCodeEmitter.inc
DIRS = InstPrinter AsmParser Disassembler TargetInfo