1c5707112e7635d1dd2f2cc9c4f42e79a51302ccaJia Liu//===-- MipsMCCodeEmitter.cpp - Convert Mips Code to Machine Code ---------===// 24520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka// 34520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka// The LLVM Compiler Infrastructure 44520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka// 54520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka// This file is distributed under the University of Illinois Open Source 64520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka// License. See LICENSE.TXT for details. 74520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka// 84520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka//===----------------------------------------------------------------------===// 94520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka// 104520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka// This file implements the MipsMCCodeEmitter class. 114520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka// 124520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka//===----------------------------------------------------------------------===// 134520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka// 144520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka#define DEBUG_TYPE "mccodeemitter" 1547b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes#include "MCTargetDesc/MipsBaseInfo.h" 168e71e617c9b1e42737ffd00984a5025ec90c734cJack Carter#include "MCTargetDesc/MipsDirectObjLower.h" 1747b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes#include "MCTargetDesc/MipsFixupKinds.h" 1847b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes#include "MCTargetDesc/MipsMCTargetDesc.h" 1947b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes#include "llvm/ADT/APFloat.h" 2047b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes#include "llvm/ADT/Statistic.h" 214520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka#include "llvm/MC/MCCodeEmitter.h" 22e8068692f924a1577075bd2d7b72b44820e0ffb2Akira Hatanaka#include "llvm/MC/MCContext.h" 234520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka#include "llvm/MC/MCExpr.h" 244520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka#include "llvm/MC/MCInst.h" 254520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka#include "llvm/MC/MCInstrInfo.h" 264520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka#include "llvm/MC/MCRegisterInfo.h" 274520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka#include "llvm/MC/MCSubtargetInfo.h" 284520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka#include "llvm/Support/raw_ostream.h" 294520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka 304520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanakausing namespace llvm; 314520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka 324520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanakanamespace { 334520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanakaclass MipsMCCodeEmitter : public MCCodeEmitter { 34dd100d831bb8062b64e7037d2bbc21bf20be4f45Craig Topper MipsMCCodeEmitter(const MipsMCCodeEmitter &) LLVM_DELETED_FUNCTION; 35dd100d831bb8062b64e7037d2bbc21bf20be4f45Craig Topper void operator=(const MipsMCCodeEmitter &) LLVM_DELETED_FUNCTION; 364520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka const MCInstrInfo &MCII; 37e8068692f924a1577075bd2d7b72b44820e0ffb2Akira Hatanaka MCContext &Ctx; 38e9e520f23ec3e5dc26e0801ac0d8b9e6899e2626Akira Hatanaka bool IsLittleEndian; 394520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka 404520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanakapublic: 41ccb3c9c2702f548fd0a7d60a622e6f4fdf0940e7Jack Carter MipsMCCodeEmitter(const MCInstrInfo &mcii, MCContext &Ctx_, 42ccb3c9c2702f548fd0a7d60a622e6f4fdf0940e7Jack Carter const MCSubtargetInfo &sti, bool IsLittle) : 435f645953555cee528cd1c0d6faa16d9b89ebba48David Blaikie MCII(mcii), Ctx(Ctx_), IsLittleEndian(IsLittle) {} 444520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka 454520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka ~MipsMCCodeEmitter() {} 464520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka 4747b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes void EmitByte(unsigned char C, raw_ostream &OS) const { 4847b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes OS << (char)C; 4947b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes } 5047b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes 5147b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes void EmitInstruction(uint64_t Val, unsigned Size, raw_ostream &OS) const { 5247b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes // Output the instruction encoding in little endian byte order. 53fb54afbcb8f460c5c4cafa605259ba0dd77504dcAkira Hatanaka for (unsigned i = 0; i < Size; ++i) { 54fb54afbcb8f460c5c4cafa605259ba0dd77504dcAkira Hatanaka unsigned Shift = IsLittleEndian ? i * 8 : (Size - 1 - i) * 8; 55fb54afbcb8f460c5c4cafa605259ba0dd77504dcAkira Hatanaka EmitByte((Val >> Shift) & 0xff, OS); 5647b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes } 574520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka } 5847b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes 5947b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes void EncodeInstruction(const MCInst &MI, raw_ostream &OS, 6047b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes SmallVectorImpl<MCFixup> &Fixups) const; 6147b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes 6247b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes // getBinaryCodeForInstr - TableGen'erated function for getting the 6347b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes // binary encoding for an instruction. 644f8dc7b17accf4f2ec953b80b2cc79786207492eOwen Anderson uint64_t getBinaryCodeForInstr(const MCInst &MI, 6547b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes SmallVectorImpl<MCFixup> &Fixups) const; 6647b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes 6747b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes // getBranchJumpOpValue - Return binary encoding of the jump 6847b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes // target operand. If the machine operand requires relocation, 6947b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes // record the relocation and return zero. 7047b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes unsigned getJumpTargetOpValue(const MCInst &MI, unsigned OpNo, 7147b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes SmallVectorImpl<MCFixup> &Fixups) const; 7247b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes 7347b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes // getBranchTargetOpValue - Return binary encoding of the branch 7447b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes // target operand. If the machine operand requires relocation, 7547b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes // record the relocation and return zero. 7647b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes unsigned getBranchTargetOpValue(const MCInst &MI, unsigned OpNo, 7747b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes SmallVectorImpl<MCFixup> &Fixups) const; 7847b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes 7947b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes // getMachineOpValue - Return binary encoding of operand. If the machin 8047b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes // operand requires relocation, record the relocation and return zero. 8147b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes unsigned getMachineOpValue(const MCInst &MI,const MCOperand &MO, 8247b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes SmallVectorImpl<MCFixup> &Fixups) const; 8347b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes 8447b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes unsigned getMemEncoding(const MCInst &MI, unsigned OpNo, 8547b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes SmallVectorImpl<MCFixup> &Fixups) const; 8647b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes unsigned getSizeExtEncoding(const MCInst &MI, unsigned OpNo, 8747b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes SmallVectorImpl<MCFixup> &Fixups) const; 8847b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes unsigned getSizeInsEncoding(const MCInst &MI, unsigned OpNo, 8947b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes SmallVectorImpl<MCFixup> &Fixups) const; 9047b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes 914520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka}; // class MipsMCCodeEmitter 924520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka} // namespace 934520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka 94e9e520f23ec3e5dc26e0801ac0d8b9e6899e2626Akira HatanakaMCCodeEmitter *llvm::createMipsMCCodeEmitterEB(const MCInstrInfo &MCII, 95918f55fe239f00651e396be841f2b3b6e242f98dJim Grosbach const MCRegisterInfo &MRI, 96e9e520f23ec3e5dc26e0801ac0d8b9e6899e2626Akira Hatanaka const MCSubtargetInfo &STI, 97e9e520f23ec3e5dc26e0801ac0d8b9e6899e2626Akira Hatanaka MCContext &Ctx) 9847b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes{ 99ccb3c9c2702f548fd0a7d60a622e6f4fdf0940e7Jack Carter return new MipsMCCodeEmitter(MCII, Ctx, STI, false); 100e9e520f23ec3e5dc26e0801ac0d8b9e6899e2626Akira Hatanaka} 101e9e520f23ec3e5dc26e0801ac0d8b9e6899e2626Akira Hatanaka 102e9e520f23ec3e5dc26e0801ac0d8b9e6899e2626Akira HatanakaMCCodeEmitter *llvm::createMipsMCCodeEmitterEL(const MCInstrInfo &MCII, 103918f55fe239f00651e396be841f2b3b6e242f98dJim Grosbach const MCRegisterInfo &MRI, 104e9e520f23ec3e5dc26e0801ac0d8b9e6899e2626Akira Hatanaka const MCSubtargetInfo &STI, 105e9e520f23ec3e5dc26e0801ac0d8b9e6899e2626Akira Hatanaka MCContext &Ctx) 106e9e520f23ec3e5dc26e0801ac0d8b9e6899e2626Akira Hatanaka{ 107ccb3c9c2702f548fd0a7d60a622e6f4fdf0940e7Jack Carter return new MipsMCCodeEmitter(MCII, Ctx, STI, true); 1084520a10fdbaabf1c0cd98b43a61469c5f0e76f38Akira Hatanaka} 10947b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes 11047b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes/// EncodeInstruction - Emit the instruction. 11147b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes/// Size the instruction (currently only 4 bytes 11247b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopesvoid MipsMCCodeEmitter:: 11347b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso LopesEncodeInstruction(const MCInst &MI, raw_ostream &OS, 11447b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes SmallVectorImpl<MCFixup> &Fixups) const 11547b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes{ 1168e71e617c9b1e42737ffd00984a5025ec90c734cJack Carter 1178e71e617c9b1e42737ffd00984a5025ec90c734cJack Carter // Non-pseudo instructions that get changed for direct object 1188e71e617c9b1e42737ffd00984a5025ec90c734cJack Carter // only based on operand values. 1198e71e617c9b1e42737ffd00984a5025ec90c734cJack Carter // If this list of instructions get much longer we will move 1208e71e617c9b1e42737ffd00984a5025ec90c734cJack Carter // the check to a function call. Until then, this is more efficient. 1218e71e617c9b1e42737ffd00984a5025ec90c734cJack Carter MCInst TmpInst = MI; 1228e71e617c9b1e42737ffd00984a5025ec90c734cJack Carter switch (MI.getOpcode()) { 1238e71e617c9b1e42737ffd00984a5025ec90c734cJack Carter // If shift amount is >= 32 it the inst needs to be lowered further 1248e71e617c9b1e42737ffd00984a5025ec90c734cJack Carter case Mips::DSLL: 1258e71e617c9b1e42737ffd00984a5025ec90c734cJack Carter case Mips::DSRL: 1268e71e617c9b1e42737ffd00984a5025ec90c734cJack Carter case Mips::DSRA: 1278e71e617c9b1e42737ffd00984a5025ec90c734cJack Carter Mips::LowerLargeShift(TmpInst); 1288e71e617c9b1e42737ffd00984a5025ec90c734cJack Carter break; 1298e71e617c9b1e42737ffd00984a5025ec90c734cJack Carter // Double extract instruction is chosen by pos and size operands 1308e71e617c9b1e42737ffd00984a5025ec90c734cJack Carter case Mips::DEXT: 1318e71e617c9b1e42737ffd00984a5025ec90c734cJack Carter case Mips::DINS: 1328e71e617c9b1e42737ffd00984a5025ec90c734cJack Carter Mips::LowerDextDins(TmpInst); 1338e71e617c9b1e42737ffd00984a5025ec90c734cJack Carter } 1348e71e617c9b1e42737ffd00984a5025ec90c734cJack Carter 1358e71e617c9b1e42737ffd00984a5025ec90c734cJack Carter uint32_t Binary = getBinaryCodeForInstr(TmpInst, Fixups); 13647b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes 13747b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes // Check for unimplemented opcodes. 1388e71e617c9b1e42737ffd00984a5025ec90c734cJack Carter // Unfortunately in MIPS both NOP and SLL will come in with Binary == 0 13947b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes // so we have to special check for them. 1408e71e617c9b1e42737ffd00984a5025ec90c734cJack Carter unsigned Opcode = TmpInst.getOpcode(); 14147b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes if ((Opcode != Mips::NOP) && (Opcode != Mips::SLL) && !Binary) 14247b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes llvm_unreachable("unimplemented opcode in EncodeInstruction()"); 14347b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes 1448e71e617c9b1e42737ffd00984a5025ec90c734cJack Carter const MCInstrDesc &Desc = MCII.get(TmpInst.getOpcode()); 14547b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes 14642faefc11da326f10a4a52d72953318921d9e43dJack Carter // Get byte count of instruction 14742faefc11da326f10a4a52d72953318921d9e43dJack Carter unsigned Size = Desc.getSize(); 14842faefc11da326f10a4a52d72953318921d9e43dJack Carter if (!Size) 14942faefc11da326f10a4a52d72953318921d9e43dJack Carter llvm_unreachable("Desc.getSize() returns 0"); 15047b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes 15147b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes EmitInstruction(Binary, Size, OS); 15247b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes} 15347b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes 15447b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes/// getBranchTargetOpValue - Return binary encoding of the branch 15547b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes/// target operand. If the machine operand requires relocation, 15647b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes/// record the relocation and return zero. 15747b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopesunsigned MipsMCCodeEmitter:: 15847b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso LopesgetBranchTargetOpValue(const MCInst &MI, unsigned OpNo, 15947b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes SmallVectorImpl<MCFixup> &Fixups) const { 16047b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes 16147b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes const MCOperand &MO = MI.getOperand(OpNo); 162ad51a4a5984a365d671ddfe9eaa23d2e12ee4281Jack Carter 163ad51a4a5984a365d671ddfe9eaa23d2e12ee4281Jack Carter // If the destination is an immediate, we have nothing to do. 164ad51a4a5984a365d671ddfe9eaa23d2e12ee4281Jack Carter if (MO.isImm()) return MO.getImm(); 165ad51a4a5984a365d671ddfe9eaa23d2e12ee4281Jack Carter assert(MO.isExpr() && 166ad51a4a5984a365d671ddfe9eaa23d2e12ee4281Jack Carter "getBranchTargetOpValue expects only expressions or immediates"); 16747b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes 16847b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes const MCExpr *Expr = MO.getExpr(); 16947b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes Fixups.push_back(MCFixup::Create(0, Expr, 17047b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes MCFixupKind(Mips::fixup_Mips_PC16))); 17147b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes return 0; 17247b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes} 17347b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes 17447b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes/// getJumpTargetOpValue - Return binary encoding of the jump 17547b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes/// target operand. If the machine operand requires relocation, 17647b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes/// record the relocation and return zero. 17747b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopesunsigned MipsMCCodeEmitter:: 17847b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso LopesgetJumpTargetOpValue(const MCInst &MI, unsigned OpNo, 17947b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes SmallVectorImpl<MCFixup> &Fixups) const { 18047b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes 18147b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes const MCOperand &MO = MI.getOperand(OpNo); 182ad51a4a5984a365d671ddfe9eaa23d2e12ee4281Jack Carter // If the destination is an immediate, we have nothing to do. 183ad51a4a5984a365d671ddfe9eaa23d2e12ee4281Jack Carter if (MO.isImm()) return MO.getImm(); 184ad51a4a5984a365d671ddfe9eaa23d2e12ee4281Jack Carter assert(MO.isExpr() && 185ad51a4a5984a365d671ddfe9eaa23d2e12ee4281Jack Carter "getJumpTargetOpValue expects only expressions or an immediate"); 18647b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes 18747b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes const MCExpr *Expr = MO.getExpr(); 18847b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes Fixups.push_back(MCFixup::Create(0, Expr, 18947b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes MCFixupKind(Mips::fixup_Mips_26))); 19047b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes return 0; 19147b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes} 19247b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes 19347b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes/// getMachineOpValue - Return binary encoding of operand. If the machine 19447b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes/// operand requires relocation, record the relocation and return zero. 19547b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopesunsigned MipsMCCodeEmitter:: 19647b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso LopesgetMachineOpValue(const MCInst &MI, const MCOperand &MO, 19747b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes SmallVectorImpl<MCFixup> &Fixups) const { 19847b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes if (MO.isReg()) { 19947b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes unsigned Reg = MO.getReg(); 200e8068692f924a1577075bd2d7b72b44820e0ffb2Akira Hatanaka unsigned RegNo = Ctx.getRegisterInfo().getEncodingValue(Reg); 20147b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes return RegNo; 20247b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes } else if (MO.isImm()) { 20347b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes return static_cast<unsigned>(MO.getImm()); 20447b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes } else if (MO.isFPImm()) { 20547b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes return static_cast<unsigned>(APFloat(MO.getFPImm()) 20647b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes .bitcastToAPInt().getHiBits(32).getLimitedValue()); 207864f66085cd9543070ef01b9f7371c110ecd7898Akira Hatanaka } 20859182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka 20959182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka // MO must be an Expr. 21059182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka assert(MO.isExpr()); 21159182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka 21259182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka const MCExpr *Expr = MO.getExpr(); 21359182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka MCExpr::ExprKind Kind = Expr->getKind(); 214421455f1ea081e2e1767e782ac0d57ca55976e9bAkira Hatanaka 21559182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka if (Kind == MCExpr::Binary) { 21659182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka Expr = static_cast<const MCBinaryExpr*>(Expr)->getLHS(); 21759182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka Kind = Expr->getKind(); 21847b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes } 21959182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka 22059182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka assert (Kind == MCExpr::SymbolRef); 221864f66085cd9543070ef01b9f7371c110ecd7898Akira Hatanaka 222eb23f9e92e607990ffe986735e10a8dec713909aBill Wendling Mips::Fixups FixupKind = Mips::Fixups(0); 22359182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka 22459182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka switch(cast<MCSymbolRefExpr>(Expr)->getKind()) { 2250140e55393c4403ab240c386501cdc5e438dcc0eJack Carter default: llvm_unreachable("Unknown fixup kind!"); 2260140e55393c4403ab240c386501cdc5e438dcc0eJack Carter break; 2270140e55393c4403ab240c386501cdc5e438dcc0eJack Carter case MCSymbolRefExpr::VK_Mips_GPOFF_HI : 2280140e55393c4403ab240c386501cdc5e438dcc0eJack Carter FixupKind = Mips::fixup_Mips_GPOFF_HI; 2290140e55393c4403ab240c386501cdc5e438dcc0eJack Carter break; 2300140e55393c4403ab240c386501cdc5e438dcc0eJack Carter case MCSymbolRefExpr::VK_Mips_GPOFF_LO : 2310140e55393c4403ab240c386501cdc5e438dcc0eJack Carter FixupKind = Mips::fixup_Mips_GPOFF_LO; 2320140e55393c4403ab240c386501cdc5e438dcc0eJack Carter break; 2330140e55393c4403ab240c386501cdc5e438dcc0eJack Carter case MCSymbolRefExpr::VK_Mips_GOT_PAGE : 2340140e55393c4403ab240c386501cdc5e438dcc0eJack Carter FixupKind = Mips::fixup_Mips_GOT_PAGE; 2350140e55393c4403ab240c386501cdc5e438dcc0eJack Carter break; 2360140e55393c4403ab240c386501cdc5e438dcc0eJack Carter case MCSymbolRefExpr::VK_Mips_GOT_OFST : 2370140e55393c4403ab240c386501cdc5e438dcc0eJack Carter FixupKind = Mips::fixup_Mips_GOT_OFST; 2380140e55393c4403ab240c386501cdc5e438dcc0eJack Carter break; 239fd506efec628819f7e6fad8016a9dbb5d8612b8bJack Carter case MCSymbolRefExpr::VK_Mips_GOT_DISP : 240fd506efec628819f7e6fad8016a9dbb5d8612b8bJack Carter FixupKind = Mips::fixup_Mips_GOT_DISP; 241fd506efec628819f7e6fad8016a9dbb5d8612b8bJack Carter break; 24259182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka case MCSymbolRefExpr::VK_Mips_GPREL: 24359182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka FixupKind = Mips::fixup_Mips_GPREL16; 24459182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka break; 24559182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka case MCSymbolRefExpr::VK_Mips_GOT_CALL: 24659182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka FixupKind = Mips::fixup_Mips_CALL16; 24759182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka break; 24859182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka case MCSymbolRefExpr::VK_Mips_GOT16: 24959182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka FixupKind = Mips::fixup_Mips_GOT_Global; 25059182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka break; 25159182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka case MCSymbolRefExpr::VK_Mips_GOT: 25259182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka FixupKind = Mips::fixup_Mips_GOT_Local; 25359182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka break; 25459182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka case MCSymbolRefExpr::VK_Mips_ABS_HI: 25559182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka FixupKind = Mips::fixup_Mips_HI16; 25659182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka break; 25759182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka case MCSymbolRefExpr::VK_Mips_ABS_LO: 25859182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka FixupKind = Mips::fixup_Mips_LO16; 25959182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka break; 26059182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka case MCSymbolRefExpr::VK_Mips_TLSGD: 26159182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka FixupKind = Mips::fixup_Mips_TLSGD; 26259182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka break; 26359182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka case MCSymbolRefExpr::VK_Mips_TLSLDM: 26459182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka FixupKind = Mips::fixup_Mips_TLSLDM; 26559182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka break; 26659182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka case MCSymbolRefExpr::VK_Mips_DTPREL_HI: 26759182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka FixupKind = Mips::fixup_Mips_DTPREL_HI; 26859182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka break; 26959182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka case MCSymbolRefExpr::VK_Mips_DTPREL_LO: 27059182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka FixupKind = Mips::fixup_Mips_DTPREL_LO; 27159182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka break; 27259182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka case MCSymbolRefExpr::VK_Mips_GOTTPREL: 27359182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka FixupKind = Mips::fixup_Mips_GOTTPREL; 27459182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka break; 27559182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka case MCSymbolRefExpr::VK_Mips_TPREL_HI: 27659182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka FixupKind = Mips::fixup_Mips_TPREL_HI; 27759182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka break; 27859182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka case MCSymbolRefExpr::VK_Mips_TPREL_LO: 27959182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka FixupKind = Mips::fixup_Mips_TPREL_LO; 28059182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka break; 281fc54d9e47a1276650f14f38e7d037c9b58c8dc2dJack Carter case MCSymbolRefExpr::VK_Mips_HIGHER: 282fc54d9e47a1276650f14f38e7d037c9b58c8dc2dJack Carter FixupKind = Mips::fixup_Mips_HIGHER; 283fc54d9e47a1276650f14f38e7d037c9b58c8dc2dJack Carter break; 284fc54d9e47a1276650f14f38e7d037c9b58c8dc2dJack Carter case MCSymbolRefExpr::VK_Mips_HIGHEST: 285fc54d9e47a1276650f14f38e7d037c9b58c8dc2dJack Carter FixupKind = Mips::fixup_Mips_HIGHEST; 286fc54d9e47a1276650f14f38e7d037c9b58c8dc2dJack Carter break; 287198ad916d736047f8a439f19dee25cee917df8a9Jack Carter case MCSymbolRefExpr::VK_Mips_GOT_HI16: 288198ad916d736047f8a439f19dee25cee917df8a9Jack Carter FixupKind = Mips::fixup_Mips_GOT_HI16; 289198ad916d736047f8a439f19dee25cee917df8a9Jack Carter break; 290198ad916d736047f8a439f19dee25cee917df8a9Jack Carter case MCSymbolRefExpr::VK_Mips_GOT_LO16: 291198ad916d736047f8a439f19dee25cee917df8a9Jack Carter FixupKind = Mips::fixup_Mips_GOT_LO16; 292198ad916d736047f8a439f19dee25cee917df8a9Jack Carter break; 293198ad916d736047f8a439f19dee25cee917df8a9Jack Carter case MCSymbolRefExpr::VK_Mips_CALL_HI16: 294198ad916d736047f8a439f19dee25cee917df8a9Jack Carter FixupKind = Mips::fixup_Mips_CALL_HI16; 295198ad916d736047f8a439f19dee25cee917df8a9Jack Carter break; 296198ad916d736047f8a439f19dee25cee917df8a9Jack Carter case MCSymbolRefExpr::VK_Mips_CALL_LO16: 297198ad916d736047f8a439f19dee25cee917df8a9Jack Carter FixupKind = Mips::fixup_Mips_CALL_LO16; 298198ad916d736047f8a439f19dee25cee917df8a9Jack Carter break; 29959182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka } // switch 30059182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka 30159182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka Fixups.push_back(MCFixup::Create(0, MO.getExpr(), MCFixupKind(FixupKind))); 30259182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka 30359182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka // All of the information is in the fixup. 30459182f9425dba2d5e0035155bd2b0a04c6ababb3Akira Hatanaka return 0; 30547b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes} 30647b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes 30747b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes/// getMemEncoding - Return binary encoding of memory related operand. 30847b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes/// If the offset operand requires relocation, record the relocation. 30947b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopesunsigned 31047b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso LopesMipsMCCodeEmitter::getMemEncoding(const MCInst &MI, unsigned OpNo, 31147b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes SmallVectorImpl<MCFixup> &Fixups) const { 31247b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes // Base register is encoded in bits 20-16, offset is encoded in bits 15-0. 31347b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes assert(MI.getOperand(OpNo).isReg()); 31447b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes unsigned RegBits = getMachineOpValue(MI, MI.getOperand(OpNo),Fixups) << 16; 31547b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes unsigned OffBits = getMachineOpValue(MI, MI.getOperand(OpNo+1), Fixups); 31647b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes 31747b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes return (OffBits & 0xFFFF) | RegBits; 31847b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes} 31947b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes 32047b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopesunsigned 32147b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso LopesMipsMCCodeEmitter::getSizeExtEncoding(const MCInst &MI, unsigned OpNo, 32247b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes SmallVectorImpl<MCFixup> &Fixups) const { 323421455f1ea081e2e1767e782ac0d57ca55976e9bAkira Hatanaka assert(MI.getOperand(OpNo).isImm()); 324d1bcf0dbc18f39e51fd3b5bf3b90d737f9965739Bruno Cardoso Lopes unsigned SizeEncoding = getMachineOpValue(MI, MI.getOperand(OpNo), Fixups); 325d1bcf0dbc18f39e51fd3b5bf3b90d737f9965739Bruno Cardoso Lopes return SizeEncoding - 1; 32647b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes} 32747b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes 328421455f1ea081e2e1767e782ac0d57ca55976e9bAkira Hatanaka// FIXME: should be called getMSBEncoding 329421455f1ea081e2e1767e782ac0d57ca55976e9bAkira Hatanaka// 33047b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopesunsigned 33147b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso LopesMipsMCCodeEmitter::getSizeInsEncoding(const MCInst &MI, unsigned OpNo, 33247b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes SmallVectorImpl<MCFixup> &Fixups) const { 333421455f1ea081e2e1767e782ac0d57ca55976e9bAkira Hatanaka assert(MI.getOperand(OpNo-1).isImm()); 334421455f1ea081e2e1767e782ac0d57ca55976e9bAkira Hatanaka assert(MI.getOperand(OpNo).isImm()); 335d1bcf0dbc18f39e51fd3b5bf3b90d737f9965739Bruno Cardoso Lopes unsigned Position = getMachineOpValue(MI, MI.getOperand(OpNo-1), Fixups); 336d1bcf0dbc18f39e51fd3b5bf3b90d737f9965739Bruno Cardoso Lopes unsigned Size = getMachineOpValue(MI, MI.getOperand(OpNo), Fixups); 337421455f1ea081e2e1767e782ac0d57ca55976e9bAkira Hatanaka 338d1bcf0dbc18f39e51fd3b5bf3b90d737f9965739Bruno Cardoso Lopes return Position + Size - 1; 33947b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes} 34047b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes 34147b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes#include "MipsGenMCCodeEmitter.inc" 34247b92f3d8362518596d57269dc53d985bc13323aBruno Cardoso Lopes 343