| //===- HexagonMCCodeEmitter.cpp - Hexagon Target Descriptions -------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "MCTargetDesc/HexagonMCCodeEmitter.h" |
| #include "MCTargetDesc/HexagonBaseInfo.h" |
| #include "MCTargetDesc/HexagonFixupKinds.h" |
| #include "MCTargetDesc/HexagonMCExpr.h" |
| #include "MCTargetDesc/HexagonMCInstrInfo.h" |
| #include "MCTargetDesc/HexagonMCTargetDesc.h" |
| #include "llvm/ADT/Statistic.h" |
| #include "llvm/MC/MCContext.h" |
| #include "llvm/MC/MCExpr.h" |
| #include "llvm/MC/MCFixup.h" |
| #include "llvm/MC/MCInst.h" |
| #include "llvm/MC/MCInstrDesc.h" |
| #include "llvm/MC/MCInstrInfo.h" |
| #include "llvm/MC/MCRegisterInfo.h" |
| #include "llvm/MC/MCSubtargetInfo.h" |
| #include "llvm/Support/Casting.h" |
| #include "llvm/Support/Compiler.h" |
| #include "llvm/Support/Debug.h" |
| #include "llvm/Support/Endian.h" |
| #include "llvm/Support/EndianStream.h" |
| #include "llvm/Support/ErrorHandling.h" |
| #include "llvm/Support/raw_ostream.h" |
| #include <cassert> |
| #include <cstddef> |
| #include <cstdint> |
| #include <map> |
| #include <string> |
| #include <vector> |
| |
| #define DEBUG_TYPE "mccodeemitter" |
| |
| using namespace llvm; |
| using namespace Hexagon; |
| |
| STATISTIC(MCNumEmitted, "Number of MC instructions emitted"); |
| |
| static const unsigned fixup_Invalid = ~0u; |
| |
| #define _ fixup_Invalid |
| #define P(x) Hexagon::fixup_Hexagon##x |
| static const std::map<unsigned, std::vector<unsigned>> ExtFixups = { |
| { MCSymbolRefExpr::VK_DTPREL, |
| { _, _, _, _, |
| _, _, P(_DTPREL_16_X), P(_DTPREL_11_X), |
| P(_DTPREL_11_X), P(_9_X), _, P(_DTPREL_11_X), |
| P(_DTPREL_16_X), _, _, _, |
| P(_DTPREL_16_X), _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| P(_DTPREL_32_6_X) }}, |
| { MCSymbolRefExpr::VK_GOT, |
| { _, _, _, _, |
| _, _, P(_GOT_11_X), _ /* [1] */, |
| _ /* [1] */, P(_9_X), _, P(_GOT_11_X), |
| P(_GOT_16_X), _, _, _, |
| P(_GOT_16_X), _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| P(_GOT_32_6_X) }}, |
| { MCSymbolRefExpr::VK_GOTREL, |
| { _, _, _, _, |
| _, _, P(_GOTREL_11_X), P(_GOTREL_11_X), |
| P(_GOTREL_11_X), P(_9_X), _, P(_GOTREL_11_X), |
| P(_GOTREL_16_X), _, _, _, |
| P(_GOTREL_16_X), _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| P(_GOTREL_32_6_X) }}, |
| { MCSymbolRefExpr::VK_TPREL, |
| { _, _, _, _, |
| _, _, P(_TPREL_16_X), P(_TPREL_11_X), |
| P(_TPREL_11_X), P(_9_X), _, P(_TPREL_11_X), |
| P(_TPREL_16_X), _, _, _, |
| P(_TPREL_16_X), _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| P(_TPREL_32_6_X) }}, |
| { MCSymbolRefExpr::VK_Hexagon_GD_GOT, |
| { _, _, _, _, |
| _, _, P(_GD_GOT_16_X), P(_GD_GOT_11_X), |
| P(_GD_GOT_11_X), P(_9_X), _, P(_GD_GOT_11_X), |
| P(_GD_GOT_16_X), _, _, _, |
| P(_GD_GOT_16_X), _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| P(_GD_GOT_32_6_X) }}, |
| { MCSymbolRefExpr::VK_Hexagon_GD_PLT, |
| { _, _, _, _, |
| _, _, _, _, |
| _, P(_9_X), _, P(_GD_PLT_B22_PCREL_X), |
| _, _, _, _, |
| _, _, _, _, |
| _, _, P(_GD_PLT_B22_PCREL_X), _, |
| _, _, _, _, |
| _, _, _, _, |
| _ }}, |
| { MCSymbolRefExpr::VK_Hexagon_IE, |
| { _, _, _, _, |
| _, _, P(_IE_16_X), _, |
| _, P(_9_X), _, _, |
| P(_IE_16_X), _, _, _, |
| P(_IE_16_X), _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| P(_IE_32_6_X) }}, |
| { MCSymbolRefExpr::VK_Hexagon_IE_GOT, |
| { _, _, _, _, |
| _, _, P(_IE_GOT_11_X), P(_IE_GOT_11_X), |
| P(_IE_GOT_11_X), P(_9_X), _, P(_IE_GOT_11_X), |
| P(_IE_GOT_16_X), _, _, _, |
| P(_IE_GOT_16_X), _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| P(_IE_GOT_32_6_X) }}, |
| { MCSymbolRefExpr::VK_Hexagon_LD_GOT, |
| { _, _, _, _, |
| _, _, P(_LD_GOT_11_X), P(_LD_GOT_11_X), |
| P(_LD_GOT_11_X), P(_9_X), _, P(_LD_GOT_11_X), |
| P(_LD_GOT_16_X), _, _, _, |
| P(_LD_GOT_16_X), _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| P(_LD_GOT_32_6_X) }}, |
| { MCSymbolRefExpr::VK_Hexagon_LD_PLT, |
| { _, _, _, _, |
| _, _, _, _, |
| _, P(_9_X), _, P(_LD_PLT_B22_PCREL_X), |
| _, _, _, _, |
| _, _, _, _, |
| _, _, P(_LD_PLT_B22_PCREL_X), _, |
| _, _, _, _, |
| _, _, _, _, |
| _ }}, |
| { MCSymbolRefExpr::VK_PCREL, |
| { _, _, _, _, |
| _, _, P(_6_PCREL_X), _, |
| _, P(_9_X), _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| P(_32_PCREL) }}, |
| { MCSymbolRefExpr::VK_None, |
| { _, _, _, _, |
| _, _, P(_6_X), P(_8_X), |
| P(_8_X), P(_9_X), P(_10_X), P(_11_X), |
| P(_12_X), P(_B13_PCREL), _, P(_B15_PCREL_X), |
| P(_16_X), _, _, _, |
| _, _, P(_B22_PCREL_X), _, |
| _, _, _, _, |
| _, _, _, _, |
| P(_32_6_X) }}, |
| }; |
| // [1] The fixup is GOT_16_X for signed values and GOT_11_X for unsigned. |
| |
| static const std::map<unsigned, std::vector<unsigned>> StdFixups = { |
| { MCSymbolRefExpr::VK_DTPREL, |
| { _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| P(_DTPREL_16), _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| P(_DTPREL_32) }}, |
| { MCSymbolRefExpr::VK_GOT, |
| { _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| P(_GOT_32) }}, |
| { MCSymbolRefExpr::VK_GOTREL, |
| { _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _ /* [2] */, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| P(_GOTREL_32) }}, |
| { MCSymbolRefExpr::VK_PLT, |
| { _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, P(_PLT_B22_PCREL), _, |
| _, _, _, _, |
| _, _, _, _, |
| _ }}, |
| { MCSymbolRefExpr::VK_TPREL, |
| { _, _, _, _, |
| _, _, _, _, |
| _, _, _, P(_TPREL_11_X), |
| _, _, _, _, |
| P(_TPREL_16), _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| P(_TPREL_32) }}, |
| { MCSymbolRefExpr::VK_Hexagon_GD_GOT, |
| { _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| P(_GD_GOT_16), _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| P(_GD_GOT_32) }}, |
| { MCSymbolRefExpr::VK_Hexagon_GD_PLT, |
| { _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, P(_GD_PLT_B22_PCREL), _, |
| _, _, _, _, |
| _, _, _, _, |
| _ }}, |
| { MCSymbolRefExpr::VK_Hexagon_GPREL, |
| { _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| P(_GPREL16_0), _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _ }}, |
| { MCSymbolRefExpr::VK_Hexagon_HI16, |
| { _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| P(_HI16), _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _ }}, |
| { MCSymbolRefExpr::VK_Hexagon_IE, |
| { _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| P(_IE_32) }}, |
| { MCSymbolRefExpr::VK_Hexagon_IE_GOT, |
| { _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| P(_IE_GOT_16), _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| P(_IE_GOT_32) }}, |
| { MCSymbolRefExpr::VK_Hexagon_LD_GOT, |
| { _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| P(_LD_GOT_16), _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| P(_LD_GOT_32) }}, |
| { MCSymbolRefExpr::VK_Hexagon_LD_PLT, |
| { _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, P(_LD_PLT_B22_PCREL), _, |
| _, _, _, _, |
| _, _, _, _, |
| _ }}, |
| { MCSymbolRefExpr::VK_Hexagon_LO16, |
| { _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| P(_LO16), _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _ }}, |
| { MCSymbolRefExpr::VK_PCREL, |
| { _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| P(_32_PCREL) }}, |
| { MCSymbolRefExpr::VK_None, |
| { _, _, _, _, |
| _, _, _, _, |
| _, _, _, _, |
| _, P(_B13_PCREL), _, P(_B15_PCREL), |
| _, _, _, _, |
| _, _, P(_B22_PCREL), _, |
| _, _, _, _, |
| _, _, _, _, |
| P(_32) }}, |
| }; |
| // |
| // [2] The actual fixup is LO16 or HI16, depending on the instruction. |
| #undef P |
| #undef _ |
| |
| uint32_t HexagonMCCodeEmitter::parseBits(size_t Last, MCInst const &MCB, |
| MCInst const &MCI) const { |
| bool Duplex = HexagonMCInstrInfo::isDuplex(MCII, MCI); |
| if (State.Index == 0) { |
| if (HexagonMCInstrInfo::isInnerLoop(MCB)) { |
| assert(!Duplex); |
| assert(State.Index != Last); |
| return HexagonII::INST_PARSE_LOOP_END; |
| } |
| } |
| if (State.Index == 1) { |
| if (HexagonMCInstrInfo::isOuterLoop(MCB)) { |
| assert(!Duplex); |
| assert(State.Index != Last); |
| return HexagonII::INST_PARSE_LOOP_END; |
| } |
| } |
| if (Duplex) { |
| assert(State.Index == Last); |
| return HexagonII::INST_PARSE_DUPLEX; |
| } |
| if (State.Index == Last) |
| return HexagonII::INST_PARSE_PACKET_END; |
| return HexagonII::INST_PARSE_NOT_END; |
| } |
| |
| /// Emit the bundle. |
| void HexagonMCCodeEmitter::encodeInstruction(const MCInst &MI, raw_ostream &OS, |
| SmallVectorImpl<MCFixup> &Fixups, |
| const MCSubtargetInfo &STI) const { |
| MCInst &HMB = const_cast<MCInst &>(MI); |
| |
| assert(HexagonMCInstrInfo::isBundle(HMB)); |
| LLVM_DEBUG(dbgs() << "Encoding bundle\n";); |
| State.Addend = 0; |
| State.Extended = false; |
| State.Bundle = &MI; |
| State.Index = 0; |
| size_t Last = HexagonMCInstrInfo::bundleSize(HMB) - 1; |
| FeatureBitset Features = computeAvailableFeatures(STI.getFeatureBits()); |
| |
| for (auto &I : HexagonMCInstrInfo::bundleInstructions(HMB)) { |
| MCInst &HMI = const_cast<MCInst &>(*I.getInst()); |
| verifyInstructionPredicates(HMI, Features); |
| |
| EncodeSingleInstruction(HMI, OS, Fixups, STI, parseBits(Last, HMB, HMI)); |
| State.Extended = HexagonMCInstrInfo::isImmext(HMI); |
| State.Addend += HEXAGON_INSTR_SIZE; |
| ++State.Index; |
| } |
| } |
| |
| static bool RegisterMatches(unsigned Consumer, unsigned Producer, |
| unsigned Producer2) { |
| return (Consumer == Producer) || (Consumer == Producer2) || |
| HexagonMCInstrInfo::IsSingleConsumerRefPairProducer(Producer, |
| Consumer); |
| } |
| |
| /// EncodeSingleInstruction - Emit a single |
| void HexagonMCCodeEmitter::EncodeSingleInstruction(const MCInst &MI, |
| raw_ostream &OS, SmallVectorImpl<MCFixup> &Fixups, |
| const MCSubtargetInfo &STI, uint32_t Parse) const { |
| assert(!HexagonMCInstrInfo::isBundle(MI)); |
| uint64_t Binary; |
| |
| // Pseudo instructions don't get encoded and shouldn't be here |
| // in the first place! |
| assert(!HexagonMCInstrInfo::getDesc(MCII, MI).isPseudo() && |
| "pseudo-instruction found"); |
| LLVM_DEBUG(dbgs() << "Encoding insn `" |
| << HexagonMCInstrInfo::getName(MCII, MI) << "'\n"); |
| |
| Binary = getBinaryCodeForInstr(MI, Fixups, STI); |
| unsigned Opc = MI.getOpcode(); |
| |
| // Check for unimplemented instructions. Immediate extenders |
| // are encoded as zero, so they need to be accounted for. |
| if (!Binary && Opc != DuplexIClass0 && Opc != A4_ext) { |
| LLVM_DEBUG(dbgs() << "Unimplemented inst `" |
| << HexagonMCInstrInfo::getName(MCII, MI) << "'\n"); |
| llvm_unreachable("Unimplemented Instruction"); |
| } |
| Binary |= Parse; |
| |
| // if we need to emit a duplexed instruction |
| if (Opc >= Hexagon::DuplexIClass0 && Opc <= Hexagon::DuplexIClassF) { |
| assert(Parse == HexagonII::INST_PARSE_DUPLEX && |
| "Emitting duplex without duplex parse bits"); |
| unsigned DupIClass = MI.getOpcode() - Hexagon::DuplexIClass0; |
| // 29 is the bit position. |
| // 0b1110 =0xE bits are masked off and down shifted by 1 bit. |
| // Last bit is moved to bit position 13 |
| Binary = ((DupIClass & 0xE) << (29 - 1)) | ((DupIClass & 0x1) << 13); |
| |
| const MCInst *Sub0 = MI.getOperand(0).getInst(); |
| const MCInst *Sub1 = MI.getOperand(1).getInst(); |
| |
| // Get subinstruction slot 0. |
| unsigned SubBits0 = getBinaryCodeForInstr(*Sub0, Fixups, STI); |
| // Get subinstruction slot 1. |
| State.SubInst1 = true; |
| unsigned SubBits1 = getBinaryCodeForInstr(*Sub1, Fixups, STI); |
| State.SubInst1 = false; |
| |
| Binary |= SubBits0 | (SubBits1 << 16); |
| } |
| support::endian::write<uint32_t>(OS, Binary, support::little); |
| ++MCNumEmitted; |
| } |
| |
| LLVM_ATTRIBUTE_NORETURN |
| static void raise_relocation_error(unsigned Width, unsigned Kind) { |
| std::string Text; |
| raw_string_ostream Stream(Text); |
| Stream << "Unrecognized relocation combination: width=" << Width |
| << " kind=" << Kind; |
| report_fatal_error(Stream.str()); |
| } |
| |
| /// Some insns are not extended and thus have no bits. These cases require |
| /// a more brute force method for determining the correct relocation. |
| Hexagon::Fixups HexagonMCCodeEmitter::getFixupNoBits( |
| MCInstrInfo const &MCII, const MCInst &MI, const MCOperand &MO, |
| const MCSymbolRefExpr::VariantKind VarKind) const { |
| const MCInstrDesc &MCID = HexagonMCInstrInfo::getDesc(MCII, MI); |
| unsigned InsnType = HexagonMCInstrInfo::getType(MCII, MI); |
| using namespace Hexagon; |
| |
| if (InsnType == HexagonII::TypeEXTENDER) { |
| if (VarKind == MCSymbolRefExpr::VK_None) { |
| auto Instrs = HexagonMCInstrInfo::bundleInstructions(*State.Bundle); |
| for (auto I = Instrs.begin(), N = Instrs.end(); I != N; ++I) { |
| if (I->getInst() != &MI) |
| continue; |
| assert(I+1 != N && "Extender cannot be last in packet"); |
| const MCInst &NextI = *(I+1)->getInst(); |
| const MCInstrDesc &NextD = HexagonMCInstrInfo::getDesc(MCII, NextI); |
| if (NextD.isBranch() || NextD.isCall() || |
| HexagonMCInstrInfo::getType(MCII, NextI) == HexagonII::TypeCR) |
| return fixup_Hexagon_B32_PCREL_X; |
| return fixup_Hexagon_32_6_X; |
| } |
| } |
| |
| static const std::map<unsigned,unsigned> Relocs = { |
| { MCSymbolRefExpr::VK_GOTREL, fixup_Hexagon_GOTREL_32_6_X }, |
| { MCSymbolRefExpr::VK_GOT, fixup_Hexagon_GOT_32_6_X }, |
| { MCSymbolRefExpr::VK_TPREL, fixup_Hexagon_TPREL_32_6_X }, |
| { MCSymbolRefExpr::VK_DTPREL, fixup_Hexagon_DTPREL_32_6_X }, |
| { MCSymbolRefExpr::VK_Hexagon_GD_GOT, fixup_Hexagon_GD_GOT_32_6_X }, |
| { MCSymbolRefExpr::VK_Hexagon_LD_GOT, fixup_Hexagon_LD_GOT_32_6_X }, |
| { MCSymbolRefExpr::VK_Hexagon_IE, fixup_Hexagon_IE_32_6_X }, |
| { MCSymbolRefExpr::VK_Hexagon_IE_GOT, fixup_Hexagon_IE_GOT_32_6_X }, |
| { MCSymbolRefExpr::VK_PCREL, fixup_Hexagon_B32_PCREL_X }, |
| { MCSymbolRefExpr::VK_Hexagon_GD_PLT, fixup_Hexagon_GD_PLT_B32_PCREL_X }, |
| { MCSymbolRefExpr::VK_Hexagon_LD_PLT, fixup_Hexagon_LD_PLT_B32_PCREL_X }, |
| }; |
| |
| auto F = Relocs.find(VarKind); |
| if (F != Relocs.end()) |
| return Hexagon::Fixups(F->second); |
| raise_relocation_error(0, VarKind); |
| } |
| |
| if (MCID.isBranch()) |
| return fixup_Hexagon_B13_PCREL; |
| |
| static const std::map<unsigned,unsigned> RelocsLo = { |
| { MCSymbolRefExpr::VK_GOT, fixup_Hexagon_GOT_LO16 }, |
| { MCSymbolRefExpr::VK_GOTREL, fixup_Hexagon_GOTREL_LO16 }, |
| { MCSymbolRefExpr::VK_Hexagon_GD_GOT, fixup_Hexagon_GD_GOT_LO16 }, |
| { MCSymbolRefExpr::VK_Hexagon_LD_GOT, fixup_Hexagon_LD_GOT_LO16 }, |
| { MCSymbolRefExpr::VK_Hexagon_IE, fixup_Hexagon_IE_LO16 }, |
| { MCSymbolRefExpr::VK_Hexagon_IE_GOT, fixup_Hexagon_IE_GOT_LO16 }, |
| { MCSymbolRefExpr::VK_TPREL, fixup_Hexagon_TPREL_LO16 }, |
| { MCSymbolRefExpr::VK_DTPREL, fixup_Hexagon_DTPREL_LO16 }, |
| { MCSymbolRefExpr::VK_None, fixup_Hexagon_LO16 }, |
| }; |
| |
| static const std::map<unsigned,unsigned> RelocsHi = { |
| { MCSymbolRefExpr::VK_GOT, fixup_Hexagon_GOT_HI16 }, |
| { MCSymbolRefExpr::VK_GOTREL, fixup_Hexagon_GOTREL_HI16 }, |
| { MCSymbolRefExpr::VK_Hexagon_GD_GOT, fixup_Hexagon_GD_GOT_HI16 }, |
| { MCSymbolRefExpr::VK_Hexagon_LD_GOT, fixup_Hexagon_LD_GOT_HI16 }, |
| { MCSymbolRefExpr::VK_Hexagon_IE, fixup_Hexagon_IE_HI16 }, |
| { MCSymbolRefExpr::VK_Hexagon_IE_GOT, fixup_Hexagon_IE_GOT_HI16 }, |
| { MCSymbolRefExpr::VK_TPREL, fixup_Hexagon_TPREL_HI16 }, |
| { MCSymbolRefExpr::VK_DTPREL, fixup_Hexagon_DTPREL_HI16 }, |
| { MCSymbolRefExpr::VK_None, fixup_Hexagon_HI16 }, |
| }; |
| |
| switch (MCID.getOpcode()) { |
| case Hexagon::LO: |
| case Hexagon::A2_tfril: { |
| auto F = RelocsLo.find(VarKind); |
| if (F != RelocsLo.end()) |
| return Hexagon::Fixups(F->second); |
| break; |
| } |
| case Hexagon::HI: |
| case Hexagon::A2_tfrih: { |
| auto F = RelocsHi.find(VarKind); |
| if (F != RelocsHi.end()) |
| return Hexagon::Fixups(F->second); |
| break; |
| } |
| } |
| |
| raise_relocation_error(0, VarKind); |
| } |
| |
| static bool isPCRel(unsigned Kind) { |
| switch (Kind){ |
| case fixup_Hexagon_B22_PCREL: |
| case fixup_Hexagon_B15_PCREL: |
| case fixup_Hexagon_B7_PCREL: |
| case fixup_Hexagon_B13_PCREL: |
| case fixup_Hexagon_B9_PCREL: |
| case fixup_Hexagon_B32_PCREL_X: |
| case fixup_Hexagon_B22_PCREL_X: |
| case fixup_Hexagon_B15_PCREL_X: |
| case fixup_Hexagon_B13_PCREL_X: |
| case fixup_Hexagon_B9_PCREL_X: |
| case fixup_Hexagon_B7_PCREL_X: |
| case fixup_Hexagon_32_PCREL: |
| case fixup_Hexagon_PLT_B22_PCREL: |
| case fixup_Hexagon_GD_PLT_B22_PCREL: |
| case fixup_Hexagon_LD_PLT_B22_PCREL: |
| case fixup_Hexagon_GD_PLT_B22_PCREL_X: |
| case fixup_Hexagon_LD_PLT_B22_PCREL_X: |
| case fixup_Hexagon_6_PCREL_X: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| unsigned HexagonMCCodeEmitter::getExprOpValue(const MCInst &MI, |
| const MCOperand &MO, const MCExpr *ME, SmallVectorImpl<MCFixup> &Fixups, |
| const MCSubtargetInfo &STI) const { |
| if (isa<HexagonMCExpr>(ME)) |
| ME = &HexagonMCInstrInfo::getExpr(*ME); |
| int64_t Value; |
| if (ME->evaluateAsAbsolute(Value)) { |
| bool InstExtendable = HexagonMCInstrInfo::isExtendable(MCII, MI) || |
| HexagonMCInstrInfo::isExtended(MCII, MI); |
| // Only sub-instruction #1 can be extended in a duplex. If MI is a |
| // sub-instruction #0, it is not extended even if Extended is true |
| // (it can be true for the duplex as a whole). |
| bool IsSub0 = HexagonMCInstrInfo::isSubInstruction(MI) && !State.SubInst1; |
| if (State.Extended && InstExtendable && !IsSub0) { |
| unsigned OpIdx = ~0u; |
| for (unsigned I = 0, E = MI.getNumOperands(); I != E; ++I) { |
| if (&MO != &MI.getOperand(I)) |
| continue; |
| OpIdx = I; |
| break; |
| } |
| assert(OpIdx != ~0u); |
| if (OpIdx == HexagonMCInstrInfo::getExtendableOp(MCII, MI)) { |
| unsigned Shift = HexagonMCInstrInfo::getExtentAlignment(MCII, MI); |
| Value = (Value & 0x3f) << Shift; |
| } |
| } |
| return Value; |
| } |
| assert(ME->getKind() == MCExpr::SymbolRef || |
| ME->getKind() == MCExpr::Binary); |
| if (ME->getKind() == MCExpr::Binary) { |
| MCBinaryExpr const *Binary = cast<MCBinaryExpr>(ME); |
| getExprOpValue(MI, MO, Binary->getLHS(), Fixups, STI); |
| getExprOpValue(MI, MO, Binary->getRHS(), Fixups, STI); |
| return 0; |
| } |
| |
| unsigned FixupKind = fixup_Invalid; |
| const MCSymbolRefExpr *MCSRE = static_cast<const MCSymbolRefExpr *>(ME); |
| const MCInstrDesc &MCID = HexagonMCInstrInfo::getDesc(MCII, MI); |
| unsigned FixupWidth = HexagonMCInstrInfo::getExtentBits(MCII, MI) - |
| HexagonMCInstrInfo::getExtentAlignment(MCII, MI); |
| MCSymbolRefExpr::VariantKind VarKind = MCSRE->getKind(); |
| unsigned Opc = MCID.getOpcode(); |
| unsigned IType = HexagonMCInstrInfo::getType(MCII, MI); |
| |
| LLVM_DEBUG(dbgs() << "----------------------------------------\n" |
| << "Opcode Name: " << HexagonMCInstrInfo::getName(MCII, MI) |
| << "\nOpcode: " << Opc << "\nRelocation bits: " |
| << FixupWidth << "\nAddend: " << State.Addend |
| << "\nVariant: " << unsigned(VarKind) |
| << "\n----------------------------------------\n"); |
| |
| // Pick the applicable fixup kind for the symbol. |
| // Handle special cases first, the rest will be looked up in the tables. |
| |
| if (FixupWidth == 16 && !State.Extended) { |
| if (VarKind == MCSymbolRefExpr::VK_None) { |
| if (HexagonMCInstrInfo::s27_2_reloc(*MO.getExpr())) { |
| // A2_iconst. |
| FixupKind = Hexagon::fixup_Hexagon_27_REG; |
| } else { |
| // Look for GP-relative fixups. |
| unsigned Shift = HexagonMCInstrInfo::getExtentAlignment(MCII, MI); |
| static const Hexagon::Fixups GPRelFixups[] = { |
| Hexagon::fixup_Hexagon_GPREL16_0, Hexagon::fixup_Hexagon_GPREL16_1, |
| Hexagon::fixup_Hexagon_GPREL16_2, Hexagon::fixup_Hexagon_GPREL16_3 |
| }; |
| assert(Shift < array_lengthof(GPRelFixups)); |
| auto UsesGP = [] (const MCInstrDesc &D) { |
| for (const MCPhysReg *U = D.getImplicitUses(); U && *U; ++U) |
| if (*U == Hexagon::GP) |
| return true; |
| return false; |
| }; |
| if (UsesGP(MCID)) |
| FixupKind = GPRelFixups[Shift]; |
| } |
| } else if (VarKind == MCSymbolRefExpr::VK_GOTREL) { |
| // Select between LO/HI. |
| if (Opc == Hexagon::LO) |
| FixupKind = Hexagon::fixup_Hexagon_GOTREL_LO16; |
| else if (Opc == Hexagon::HI) |
| FixupKind = Hexagon::fixup_Hexagon_GOTREL_HI16; |
| } |
| } else { |
| bool BranchOrCR = MCID.isBranch() || IType == HexagonII::TypeCR; |
| switch (FixupWidth) { |
| case 9: |
| if (BranchOrCR) |
| FixupKind = State.Extended ? Hexagon::fixup_Hexagon_B9_PCREL_X |
| : Hexagon::fixup_Hexagon_B9_PCREL; |
| break; |
| case 8: |
| case 7: |
| if (State.Extended && VarKind == MCSymbolRefExpr::VK_GOT) |
| FixupKind = HexagonMCInstrInfo::isExtentSigned(MCII, MI) |
| ? Hexagon::fixup_Hexagon_GOT_16_X |
| : Hexagon::fixup_Hexagon_GOT_11_X; |
| else if (FixupWidth == 7 && BranchOrCR) |
| FixupKind = State.Extended ? Hexagon::fixup_Hexagon_B7_PCREL_X |
| : Hexagon::fixup_Hexagon_B7_PCREL; |
| break; |
| case 0: |
| FixupKind = getFixupNoBits(MCII, MI, MO, VarKind); |
| break; |
| } |
| } |
| |
| if (FixupKind == fixup_Invalid) { |
| const auto &FixupTable = State.Extended ? ExtFixups : StdFixups; |
| |
| auto FindVK = FixupTable.find(VarKind); |
| if (FindVK != FixupTable.end()) |
| FixupKind = FindVK->second[FixupWidth]; |
| } |
| |
| if (FixupKind == fixup_Invalid) |
| raise_relocation_error(FixupWidth, VarKind); |
| |
| const MCExpr *FixupExpr = MO.getExpr(); |
| if (State.Addend != 0 && isPCRel(FixupKind)) { |
| const MCExpr *C = MCConstantExpr::create(State.Addend, MCT); |
| FixupExpr = MCBinaryExpr::createAdd(FixupExpr, C, MCT); |
| } |
| |
| MCFixup Fixup = MCFixup::create(State.Addend, FixupExpr, |
| MCFixupKind(FixupKind), MI.getLoc()); |
| Fixups.push_back(Fixup); |
| // All of the information is in the fixup. |
| return 0; |
| } |
| |
| unsigned |
| HexagonMCCodeEmitter::getMachineOpValue(MCInst const &MI, MCOperand const &MO, |
| SmallVectorImpl<MCFixup> &Fixups, |
| MCSubtargetInfo const &STI) const { |
| #ifndef NDEBUG |
| size_t OperandNumber = ~0U; |
| for (unsigned i = 0, n = MI.getNumOperands(); i < n; ++i) |
| if (&MI.getOperand(i) == &MO) { |
| OperandNumber = i; |
| break; |
| } |
| assert((OperandNumber != ~0U) && "Operand not found"); |
| #endif |
| |
| if (HexagonMCInstrInfo::isNewValue(MCII, MI) && |
| &MO == &HexagonMCInstrInfo::getNewValueOperand(MCII, MI)) { |
| // Calculate the new value distance to the associated producer |
| unsigned SOffset = 0; |
| unsigned VOffset = 0; |
| unsigned UseReg = MO.getReg(); |
| unsigned DefReg1 = Hexagon::NoRegister; |
| unsigned DefReg2 = Hexagon::NoRegister; |
| |
| auto Instrs = HexagonMCInstrInfo::bundleInstructions(*State.Bundle); |
| const MCOperand *I = Instrs.begin() + State.Index - 1; |
| |
| for (;; --I) { |
| assert(I != Instrs.begin() - 1 && "Couldn't find producer"); |
| MCInst const &Inst = *I->getInst(); |
| if (HexagonMCInstrInfo::isImmext(Inst)) |
| continue; |
| |
| DefReg1 = Hexagon::NoRegister; |
| DefReg2 = Hexagon::NoRegister; |
| ++SOffset; |
| if (HexagonMCInstrInfo::isVector(MCII, Inst)) { |
| // Vector instructions don't count scalars. |
| ++VOffset; |
| } |
| if (HexagonMCInstrInfo::hasNewValue(MCII, Inst)) |
| DefReg1 = HexagonMCInstrInfo::getNewValueOperand(MCII, Inst).getReg(); |
| if (HexagonMCInstrInfo::hasNewValue2(MCII, Inst)) |
| DefReg2 = HexagonMCInstrInfo::getNewValueOperand2(MCII, Inst).getReg(); |
| if (!RegisterMatches(UseReg, DefReg1, DefReg2)) { |
| // This isn't the register we're looking for |
| continue; |
| } |
| if (!HexagonMCInstrInfo::isPredicated(MCII, Inst)) { |
| // Producer is unpredicated |
| break; |
| } |
| assert(HexagonMCInstrInfo::isPredicated(MCII, MI) && |
| "Unpredicated consumer depending on predicated producer"); |
| if (HexagonMCInstrInfo::isPredicatedTrue(MCII, Inst) == |
| HexagonMCInstrInfo::isPredicatedTrue(MCII, MI)) |
| // Producer predicate sense matched ours. |
| break; |
| } |
| // Hexagon PRM 10.11 Construct Nt from distance |
| unsigned Offset = HexagonMCInstrInfo::isVector(MCII, MI) ? VOffset |
| : SOffset; |
| Offset <<= 1; |
| Offset |= HexagonMCInstrInfo::SubregisterBit(UseReg, DefReg1, DefReg2); |
| return Offset; |
| } |
| |
| assert(!MO.isImm()); |
| if (MO.isReg()) { |
| unsigned Reg = MO.getReg(); |
| if (HexagonMCInstrInfo::isSubInstruction(MI) || |
| HexagonMCInstrInfo::getType(MCII, MI) == HexagonII::TypeCJ) |
| return HexagonMCInstrInfo::getDuplexRegisterNumbering(Reg); |
| return MCT.getRegisterInfo()->getEncodingValue(Reg); |
| } |
| |
| return getExprOpValue(MI, MO, MO.getExpr(), Fixups, STI); |
| } |
| |
| MCCodeEmitter *llvm::createHexagonMCCodeEmitter(MCInstrInfo const &MII, |
| MCRegisterInfo const &MRI, |
| MCContext &MCT) { |
| return new HexagonMCCodeEmitter(MII, MCT); |
| } |
| |
| #define ENABLE_INSTR_PREDICATE_VERIFIER |
| #include "HexagonGenMCCodeEmitter.inc" |
