| //=- AArch64/AArch64MCCodeEmitter.cpp - Convert AArch64 code to machine code =// |
| // |
| // 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 AArch64MCCodeEmitter class. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #define DEBUG_TYPE "mccodeemitter" |
| #include "MCTargetDesc/AArch64FixupKinds.h" |
| #include "MCTargetDesc/AArch64MCExpr.h" |
| #include "MCTargetDesc/AArch64MCTargetDesc.h" |
| #include "Utils/AArch64BaseInfo.h" |
| #include "llvm/MC/MCCodeEmitter.h" |
| #include "llvm/MC/MCContext.h" |
| #include "llvm/MC/MCInst.h" |
| #include "llvm/MC/MCInstrInfo.h" |
| #include "llvm/MC/MCRegisterInfo.h" |
| #include "llvm/MC/MCSubtargetInfo.h" |
| #include "llvm/Support/ErrorHandling.h" |
| #include "llvm/Support/raw_ostream.h" |
| |
| using namespace llvm; |
| |
| namespace { |
| class AArch64MCCodeEmitter : public MCCodeEmitter { |
| AArch64MCCodeEmitter(const AArch64MCCodeEmitter &) LLVM_DELETED_FUNCTION; |
| void operator=(const AArch64MCCodeEmitter &) LLVM_DELETED_FUNCTION; |
| MCContext &Ctx; |
| |
| public: |
| AArch64MCCodeEmitter(MCContext &ctx) : Ctx(ctx) {} |
| |
| ~AArch64MCCodeEmitter() {} |
| |
| unsigned getAddSubImmOpValue(const MCInst &MI, unsigned OpIdx, |
| SmallVectorImpl<MCFixup> &Fixups) const; |
| |
| unsigned getAdrpLabelOpValue(const MCInst &MI, unsigned OpIdx, |
| SmallVectorImpl<MCFixup> &Fixups) const; |
| |
| template<int MemSize> |
| unsigned getOffsetUImm12OpValue(const MCInst &MI, unsigned OpIdx, |
| SmallVectorImpl<MCFixup> &Fixups) const { |
| return getOffsetUImm12OpValue(MI, OpIdx, Fixups, MemSize); |
| } |
| |
| unsigned getOffsetUImm12OpValue(const MCInst &MI, unsigned OpIdx, |
| SmallVectorImpl<MCFixup> &Fixups, |
| int MemSize) const; |
| |
| unsigned getBitfield32LSLOpValue(const MCInst &MI, unsigned OpIdx, |
| SmallVectorImpl<MCFixup> &Fixups) const; |
| unsigned getBitfield64LSLOpValue(const MCInst &MI, unsigned OpIdx, |
| SmallVectorImpl<MCFixup> &Fixups) const; |
| |
| |
| // Labels are handled mostly the same way: a symbol is needed, and |
| // just gets some fixup attached. |
| template<AArch64::Fixups fixupDesired> |
| unsigned getLabelOpValue(const MCInst &MI, unsigned OpIdx, |
| SmallVectorImpl<MCFixup> &Fixups) const; |
| |
| unsigned getLoadLitLabelOpValue(const MCInst &MI, unsigned OpIdx, |
| SmallVectorImpl<MCFixup> &Fixups) const; |
| |
| |
| unsigned getMoveWideImmOpValue(const MCInst &MI, unsigned OpIdx, |
| SmallVectorImpl<MCFixup> &Fixups) const; |
| |
| |
| unsigned getAddressWithFixup(const MCOperand &MO, |
| unsigned FixupKind, |
| SmallVectorImpl<MCFixup> &Fixups) const; |
| |
| |
| // getBinaryCodeForInstr - TableGen'erated function for getting the |
| // binary encoding for an instruction. |
| uint64_t 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, |
| SmallVectorImpl<MCFixup> &Fixups) const; |
| |
| |
| void EmitByte(unsigned char C, raw_ostream &OS) const { |
| OS << (char)C; |
| } |
| |
| void EmitInstruction(uint32_t Val, raw_ostream &OS) const { |
| // Output the constant in little endian byte order. |
| for (unsigned i = 0; i != 4; ++i) { |
| EmitByte(Val & 0xff, OS); |
| Val >>= 8; |
| } |
| } |
| |
| |
| void EncodeInstruction(const MCInst &MI, raw_ostream &OS, |
| SmallVectorImpl<MCFixup> &Fixups) const; |
| |
| unsigned fixFCMPImm(const MCInst &MI, unsigned EncodedValue) const; |
| |
| template<int hasRs, int hasRt2> unsigned |
| fixLoadStoreExclusive(const MCInst &MI, unsigned EncodedValue) const; |
| |
| unsigned fixMOVZ(const MCInst &MI, unsigned EncodedValue) const; |
| |
| unsigned fixMulHigh(const MCInst &MI, unsigned EncodedValue) const; |
| |
| |
| }; |
| |
| } // end anonymous namespace |
| |
| unsigned AArch64MCCodeEmitter::getAddressWithFixup(const MCOperand &MO, |
| unsigned FixupKind, |
| SmallVectorImpl<MCFixup> &Fixups) const { |
| if (!MO.isExpr()) { |
| // This can occur for manually decoded or constructed MCInsts, but neither |
| // the assembly-parser nor instruction selection will currently produce an |
| // MCInst that's not a symbol reference. |
| assert(MO.isImm() && "Unexpected address requested"); |
| return MO.getImm(); |
| } |
| |
| const MCExpr *Expr = MO.getExpr(); |
| MCFixupKind Kind = MCFixupKind(FixupKind); |
| Fixups.push_back(MCFixup::Create(0, Expr, Kind)); |
| |
| return 0; |
| } |
| |
| unsigned AArch64MCCodeEmitter:: |
| getOffsetUImm12OpValue(const MCInst &MI, unsigned OpIdx, |
| SmallVectorImpl<MCFixup> &Fixups, |
| int MemSize) const { |
| const MCOperand &ImmOp = MI.getOperand(OpIdx); |
| if (ImmOp.isImm()) |
| return ImmOp.getImm(); |
| |
| assert(ImmOp.isExpr() && "Unexpected operand type"); |
| const AArch64MCExpr *Expr = cast<AArch64MCExpr>(ImmOp.getExpr()); |
| unsigned FixupKind; |
| |
| |
| switch (Expr->getKind()) { |
| default: llvm_unreachable("Unexpected operand modifier"); |
| case AArch64MCExpr::VK_AARCH64_LO12: { |
| unsigned FixupsBySize[] = { AArch64::fixup_a64_ldst8_lo12, |
| AArch64::fixup_a64_ldst16_lo12, |
| AArch64::fixup_a64_ldst32_lo12, |
| AArch64::fixup_a64_ldst64_lo12, |
| AArch64::fixup_a64_ldst128_lo12 }; |
| assert(MemSize <= 16 && "Invalid fixup for operation"); |
| FixupKind = FixupsBySize[Log2_32(MemSize)]; |
| break; |
| } |
| case AArch64MCExpr::VK_AARCH64_GOT_LO12: |
| assert(MemSize == 8 && "Invalid fixup for operation"); |
| FixupKind = AArch64::fixup_a64_ld64_got_lo12_nc; |
| break; |
| case AArch64MCExpr::VK_AARCH64_DTPREL_LO12: { |
| unsigned FixupsBySize[] = { AArch64::fixup_a64_ldst8_dtprel_lo12, |
| AArch64::fixup_a64_ldst16_dtprel_lo12, |
| AArch64::fixup_a64_ldst32_dtprel_lo12, |
| AArch64::fixup_a64_ldst64_dtprel_lo12 }; |
| assert(MemSize <= 8 && "Invalid fixup for operation"); |
| FixupKind = FixupsBySize[Log2_32(MemSize)]; |
| break; |
| } |
| case AArch64MCExpr::VK_AARCH64_DTPREL_LO12_NC: { |
| unsigned FixupsBySize[] = { AArch64::fixup_a64_ldst8_dtprel_lo12_nc, |
| AArch64::fixup_a64_ldst16_dtprel_lo12_nc, |
| AArch64::fixup_a64_ldst32_dtprel_lo12_nc, |
| AArch64::fixup_a64_ldst64_dtprel_lo12_nc }; |
| assert(MemSize <= 8 && "Invalid fixup for operation"); |
| FixupKind = FixupsBySize[Log2_32(MemSize)]; |
| break; |
| } |
| case AArch64MCExpr::VK_AARCH64_GOTTPREL_LO12: |
| assert(MemSize == 8 && "Invalid fixup for operation"); |
| FixupKind = AArch64::fixup_a64_ld64_gottprel_lo12_nc; |
| break; |
| case AArch64MCExpr::VK_AARCH64_TPREL_LO12:{ |
| unsigned FixupsBySize[] = { AArch64::fixup_a64_ldst8_tprel_lo12, |
| AArch64::fixup_a64_ldst16_tprel_lo12, |
| AArch64::fixup_a64_ldst32_tprel_lo12, |
| AArch64::fixup_a64_ldst64_tprel_lo12 }; |
| assert(MemSize <= 8 && "Invalid fixup for operation"); |
| FixupKind = FixupsBySize[Log2_32(MemSize)]; |
| break; |
| } |
| case AArch64MCExpr::VK_AARCH64_TPREL_LO12_NC: { |
| unsigned FixupsBySize[] = { AArch64::fixup_a64_ldst8_tprel_lo12_nc, |
| AArch64::fixup_a64_ldst16_tprel_lo12_nc, |
| AArch64::fixup_a64_ldst32_tprel_lo12_nc, |
| AArch64::fixup_a64_ldst64_tprel_lo12_nc }; |
| assert(MemSize <= 8 && "Invalid fixup for operation"); |
| FixupKind = FixupsBySize[Log2_32(MemSize)]; |
| break; |
| } |
| case AArch64MCExpr::VK_AARCH64_TLSDESC_LO12: |
| assert(MemSize == 8 && "Invalid fixup for operation"); |
| FixupKind = AArch64::fixup_a64_tlsdesc_ld64_lo12_nc; |
| break; |
| } |
| |
| return getAddressWithFixup(ImmOp, FixupKind, Fixups); |
| } |
| |
| unsigned |
| AArch64MCCodeEmitter::getAddSubImmOpValue(const MCInst &MI, unsigned OpIdx, |
| SmallVectorImpl<MCFixup> &Fixups) const { |
| const MCOperand &MO = MI.getOperand(OpIdx); |
| if (MO.isImm()) |
| return static_cast<unsigned>(MO.getImm()); |
| |
| assert(MO.isExpr()); |
| |
| unsigned FixupKind = 0; |
| switch(cast<AArch64MCExpr>(MO.getExpr())->getKind()) { |
| default: llvm_unreachable("Invalid expression modifier"); |
| case AArch64MCExpr::VK_AARCH64_LO12: |
| FixupKind = AArch64::fixup_a64_add_lo12; break; |
| case AArch64MCExpr::VK_AARCH64_DTPREL_HI12: |
| FixupKind = AArch64::fixup_a64_add_dtprel_hi12; break; |
| case AArch64MCExpr::VK_AARCH64_DTPREL_LO12: |
| FixupKind = AArch64::fixup_a64_add_dtprel_lo12; break; |
| case AArch64MCExpr::VK_AARCH64_DTPREL_LO12_NC: |
| FixupKind = AArch64::fixup_a64_add_dtprel_lo12_nc; break; |
| case AArch64MCExpr::VK_AARCH64_TPREL_HI12: |
| FixupKind = AArch64::fixup_a64_add_tprel_hi12; break; |
| case AArch64MCExpr::VK_AARCH64_TPREL_LO12: |
| FixupKind = AArch64::fixup_a64_add_tprel_lo12; break; |
| case AArch64MCExpr::VK_AARCH64_TPREL_LO12_NC: |
| FixupKind = AArch64::fixup_a64_add_tprel_lo12_nc; break; |
| case AArch64MCExpr::VK_AARCH64_TLSDESC_LO12: |
| FixupKind = AArch64::fixup_a64_tlsdesc_add_lo12_nc; break; |
| } |
| |
| return getAddressWithFixup(MO, FixupKind, Fixups); |
| } |
| |
| unsigned |
| AArch64MCCodeEmitter::getAdrpLabelOpValue(const MCInst &MI, unsigned OpIdx, |
| SmallVectorImpl<MCFixup> &Fixups) const { |
| |
| const MCOperand &MO = MI.getOperand(OpIdx); |
| if (MO.isImm()) |
| return static_cast<unsigned>(MO.getImm()); |
| |
| assert(MO.isExpr()); |
| |
| unsigned Modifier = AArch64MCExpr::VK_AARCH64_None; |
| if (const AArch64MCExpr *Expr = dyn_cast<AArch64MCExpr>(MO.getExpr())) |
| Modifier = Expr->getKind(); |
| |
| unsigned FixupKind = 0; |
| switch(Modifier) { |
| case AArch64MCExpr::VK_AARCH64_None: |
| FixupKind = AArch64::fixup_a64_adr_prel_page; |
| break; |
| case AArch64MCExpr::VK_AARCH64_GOT: |
| FixupKind = AArch64::fixup_a64_adr_prel_got_page; |
| break; |
| case AArch64MCExpr::VK_AARCH64_GOTTPREL: |
| FixupKind = AArch64::fixup_a64_adr_gottprel_page; |
| break; |
| case AArch64MCExpr::VK_AARCH64_TLSDESC: |
| FixupKind = AArch64::fixup_a64_tlsdesc_adr_page; |
| break; |
| default: |
| llvm_unreachable("Unknown symbol reference kind for ADRP instruction"); |
| } |
| |
| return getAddressWithFixup(MO, FixupKind, Fixups); |
| } |
| |
| unsigned |
| AArch64MCCodeEmitter::getBitfield32LSLOpValue(const MCInst &MI, unsigned OpIdx, |
| SmallVectorImpl<MCFixup> &Fixups) const { |
| |
| const MCOperand &MO = MI.getOperand(OpIdx); |
| assert(MO.isImm() && "Only immediate expected for shift"); |
| |
| return ((32 - MO.getImm()) & 0x1f) | (31 - MO.getImm()) << 6; |
| } |
| |
| unsigned |
| AArch64MCCodeEmitter::getBitfield64LSLOpValue(const MCInst &MI, unsigned OpIdx, |
| SmallVectorImpl<MCFixup> &Fixups) const { |
| |
| const MCOperand &MO = MI.getOperand(OpIdx); |
| assert(MO.isImm() && "Only immediate expected for shift"); |
| |
| return ((64 - MO.getImm()) & 0x3f) | (63 - MO.getImm()) << 6; |
| } |
| |
| |
| template<AArch64::Fixups fixupDesired> unsigned |
| AArch64MCCodeEmitter::getLabelOpValue(const MCInst &MI, |
| unsigned OpIdx, |
| SmallVectorImpl<MCFixup> &Fixups) const { |
| const MCOperand &MO = MI.getOperand(OpIdx); |
| |
| if (MO.isExpr()) |
| return getAddressWithFixup(MO, fixupDesired, Fixups); |
| |
| assert(MO.isImm()); |
| return MO.getImm(); |
| } |
| |
| unsigned |
| AArch64MCCodeEmitter::getLoadLitLabelOpValue(const MCInst &MI, |
| unsigned OpIdx, |
| SmallVectorImpl<MCFixup> &Fixups) const { |
| const MCOperand &MO = MI.getOperand(OpIdx); |
| |
| if (MO.isImm()) |
| return MO.getImm(); |
| |
| assert(MO.isExpr()); |
| |
| unsigned FixupKind; |
| if (isa<AArch64MCExpr>(MO.getExpr())) { |
| assert(dyn_cast<AArch64MCExpr>(MO.getExpr())->getKind() |
| == AArch64MCExpr::VK_AARCH64_GOTTPREL |
| && "Invalid symbol modifier for literal load"); |
| FixupKind = AArch64::fixup_a64_ld_gottprel_prel19; |
| } else { |
| FixupKind = AArch64::fixup_a64_ld_prel; |
| } |
| |
| return getAddressWithFixup(MO, FixupKind, Fixups); |
| } |
| |
| |
| unsigned |
| AArch64MCCodeEmitter::getMachineOpValue(const MCInst &MI, |
| const MCOperand &MO, |
| SmallVectorImpl<MCFixup> &Fixups) const { |
| if (MO.isReg()) { |
| return Ctx.getRegisterInfo().getEncodingValue(MO.getReg()); |
| } else if (MO.isImm()) { |
| return static_cast<unsigned>(MO.getImm()); |
| } |
| |
| llvm_unreachable("Unable to encode MCOperand!"); |
| return 0; |
| } |
| |
| unsigned |
| AArch64MCCodeEmitter::getMoveWideImmOpValue(const MCInst &MI, unsigned OpIdx, |
| SmallVectorImpl<MCFixup> &Fixups) const { |
| const MCOperand &UImm16MO = MI.getOperand(OpIdx); |
| const MCOperand &ShiftMO = MI.getOperand(OpIdx + 1); |
| |
| unsigned Result = static_cast<unsigned>(ShiftMO.getImm()) << 16; |
| |
| if (UImm16MO.isImm()) { |
| Result |= UImm16MO.getImm(); |
| return Result; |
| } |
| |
| const AArch64MCExpr *A64E = cast<AArch64MCExpr>(UImm16MO.getExpr()); |
| AArch64::Fixups requestedFixup; |
| switch (A64E->getKind()) { |
| default: llvm_unreachable("unexpected expression modifier"); |
| case AArch64MCExpr::VK_AARCH64_ABS_G0: |
| requestedFixup = AArch64::fixup_a64_movw_uabs_g0; break; |
| case AArch64MCExpr::VK_AARCH64_ABS_G0_NC: |
| requestedFixup = AArch64::fixup_a64_movw_uabs_g0_nc; break; |
| case AArch64MCExpr::VK_AARCH64_ABS_G1: |
| requestedFixup = AArch64::fixup_a64_movw_uabs_g1; break; |
| case AArch64MCExpr::VK_AARCH64_ABS_G1_NC: |
| requestedFixup = AArch64::fixup_a64_movw_uabs_g1_nc; break; |
| case AArch64MCExpr::VK_AARCH64_ABS_G2: |
| requestedFixup = AArch64::fixup_a64_movw_uabs_g2; break; |
| case AArch64MCExpr::VK_AARCH64_ABS_G2_NC: |
| requestedFixup = AArch64::fixup_a64_movw_uabs_g2_nc; break; |
| case AArch64MCExpr::VK_AARCH64_ABS_G3: |
| requestedFixup = AArch64::fixup_a64_movw_uabs_g3; break; |
| case AArch64MCExpr::VK_AARCH64_SABS_G0: |
| requestedFixup = AArch64::fixup_a64_movw_sabs_g0; break; |
| case AArch64MCExpr::VK_AARCH64_SABS_G1: |
| requestedFixup = AArch64::fixup_a64_movw_sabs_g1; break; |
| case AArch64MCExpr::VK_AARCH64_SABS_G2: |
| requestedFixup = AArch64::fixup_a64_movw_sabs_g2; break; |
| case AArch64MCExpr::VK_AARCH64_DTPREL_G2: |
| requestedFixup = AArch64::fixup_a64_movw_dtprel_g2; break; |
| case AArch64MCExpr::VK_AARCH64_DTPREL_G1: |
| requestedFixup = AArch64::fixup_a64_movw_dtprel_g1; break; |
| case AArch64MCExpr::VK_AARCH64_DTPREL_G1_NC: |
| requestedFixup = AArch64::fixup_a64_movw_dtprel_g1_nc; break; |
| case AArch64MCExpr::VK_AARCH64_DTPREL_G0: |
| requestedFixup = AArch64::fixup_a64_movw_dtprel_g0; break; |
| case AArch64MCExpr::VK_AARCH64_DTPREL_G0_NC: |
| requestedFixup = AArch64::fixup_a64_movw_dtprel_g0_nc; break; |
| case AArch64MCExpr::VK_AARCH64_GOTTPREL_G1: |
| requestedFixup = AArch64::fixup_a64_movw_gottprel_g1; break; |
| case AArch64MCExpr::VK_AARCH64_GOTTPREL_G0_NC: |
| requestedFixup = AArch64::fixup_a64_movw_gottprel_g0_nc; break; |
| case AArch64MCExpr::VK_AARCH64_TPREL_G2: |
| requestedFixup = AArch64::fixup_a64_movw_tprel_g2; break; |
| case AArch64MCExpr::VK_AARCH64_TPREL_G1: |
| requestedFixup = AArch64::fixup_a64_movw_tprel_g1; break; |
| case AArch64MCExpr::VK_AARCH64_TPREL_G1_NC: |
| requestedFixup = AArch64::fixup_a64_movw_tprel_g1_nc; break; |
| case AArch64MCExpr::VK_AARCH64_TPREL_G0: |
| requestedFixup = AArch64::fixup_a64_movw_tprel_g0; break; |
| case AArch64MCExpr::VK_AARCH64_TPREL_G0_NC: |
| requestedFixup = AArch64::fixup_a64_movw_tprel_g0_nc; break; |
| } |
| |
| return Result | getAddressWithFixup(UImm16MO, requestedFixup, Fixups); |
| } |
| |
| unsigned AArch64MCCodeEmitter::fixFCMPImm(const MCInst &MI, |
| unsigned EncodedValue) const { |
| // For FCMP[E] Rn, #0.0, the Rm field has a canonical representation |
| // with 0s, but is architecturally ignored |
| EncodedValue &= ~0x1f0000u; |
| |
| return EncodedValue; |
| } |
| |
| template<int hasRs, int hasRt2> unsigned |
| AArch64MCCodeEmitter::fixLoadStoreExclusive(const MCInst &MI, |
| unsigned EncodedValue) const { |
| if (!hasRs) EncodedValue |= 0x001F0000; |
| if (!hasRt2) EncodedValue |= 0x00007C00; |
| |
| return EncodedValue; |
| } |
| |
| unsigned |
| AArch64MCCodeEmitter::fixMOVZ(const MCInst &MI, unsigned EncodedValue) const { |
| // If one of the signed fixup kinds is applied to a MOVZ instruction, the |
| // eventual result could be either a MOVZ or a MOVN. It's the MCCodeEmitter's |
| // job to ensure that any bits possibly affected by this are 0. This means we |
| // must zero out bit 30 (essentially emitting a MOVN). |
| MCOperand UImm16MO = MI.getOperand(1); |
| |
| // Nothing to do if there's no fixup. |
| if (UImm16MO.isImm()) |
| return EncodedValue; |
| |
| const AArch64MCExpr *A64E = cast<AArch64MCExpr>(UImm16MO.getExpr()); |
| switch (A64E->getKind()) { |
| case AArch64MCExpr::VK_AARCH64_SABS_G0: |
| case AArch64MCExpr::VK_AARCH64_SABS_G1: |
| case AArch64MCExpr::VK_AARCH64_SABS_G2: |
| case AArch64MCExpr::VK_AARCH64_DTPREL_G2: |
| case AArch64MCExpr::VK_AARCH64_DTPREL_G1: |
| case AArch64MCExpr::VK_AARCH64_DTPREL_G0: |
| case AArch64MCExpr::VK_AARCH64_GOTTPREL_G1: |
| case AArch64MCExpr::VK_AARCH64_TPREL_G2: |
| case AArch64MCExpr::VK_AARCH64_TPREL_G1: |
| case AArch64MCExpr::VK_AARCH64_TPREL_G0: |
| return EncodedValue & ~(1u << 30); |
| default: |
| // Nothing to do for an unsigned fixup. |
| return EncodedValue; |
| } |
| |
| llvm_unreachable("Should have returned by now"); |
| } |
| |
| unsigned |
| AArch64MCCodeEmitter::fixMulHigh(const MCInst &MI, |
| unsigned EncodedValue) const { |
| // The Ra field of SMULH and UMULH is unused: it should be assembled as 31 |
| // (i.e. all bits 1) but is ignored by the processor. |
| EncodedValue |= 0x1f << 10; |
| return EncodedValue; |
| } |
| |
| MCCodeEmitter *llvm::createAArch64MCCodeEmitter(const MCInstrInfo &MCII, |
| const MCRegisterInfo &MRI, |
| const MCSubtargetInfo &STI, |
| MCContext &Ctx) { |
| return new AArch64MCCodeEmitter(Ctx); |
| } |
| |
| void AArch64MCCodeEmitter:: |
| EncodeInstruction(const MCInst &MI, raw_ostream &OS, |
| SmallVectorImpl<MCFixup> &Fixups) const { |
| if (MI.getOpcode() == AArch64::TLSDESCCALL) { |
| // This is a directive which applies an R_AARCH64_TLSDESC_CALL to the |
| // following (BLR) instruction. It doesn't emit any code itself so it |
| // doesn't go through the normal TableGenerated channels. |
| MCFixupKind Fixup = MCFixupKind(AArch64::fixup_a64_tlsdesc_call); |
| const MCExpr *Expr; |
| Expr = AArch64MCExpr::CreateTLSDesc(MI.getOperand(0).getExpr(), Ctx); |
| Fixups.push_back(MCFixup::Create(0, Expr, Fixup)); |
| return; |
| } |
| |
| uint32_t Binary = getBinaryCodeForInstr(MI, Fixups); |
| |
| EmitInstruction(Binary, OS); |
| } |
| |
| |
| #include "AArch64GenMCCodeEmitter.inc" |
