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Diffstat (limited to 'contrib/llvm/lib/Target/Sparc/AsmParser/SparcAsmParser.cpp')
| -rw-r--r-- | contrib/llvm/lib/Target/Sparc/AsmParser/SparcAsmParser.cpp | 1219 |
1 files changed, 1219 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Target/Sparc/AsmParser/SparcAsmParser.cpp b/contrib/llvm/lib/Target/Sparc/AsmParser/SparcAsmParser.cpp new file mode 100644 index 0000000..a552747 --- /dev/null +++ b/contrib/llvm/lib/Target/Sparc/AsmParser/SparcAsmParser.cpp @@ -0,0 +1,1219 @@ +//===-- SparcAsmParser.cpp - Parse Sparc assembly to MCInst instructions --===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "MCTargetDesc/SparcMCTargetDesc.h" +#include "MCTargetDesc/SparcMCExpr.h" +#include "llvm/ADT/STLExtras.h" +#include "llvm/MC/MCContext.h" +#include "llvm/MC/MCInst.h" +#include "llvm/MC/MCObjectFileInfo.h" +#include "llvm/MC/MCParser/MCParsedAsmOperand.h" +#include "llvm/MC/MCRegisterInfo.h" +#include "llvm/MC/MCStreamer.h" +#include "llvm/MC/MCSubtargetInfo.h" +#include "llvm/MC/MCSymbol.h" +#include "llvm/MC/MCTargetAsmParser.h" +#include "llvm/Support/TargetRegistry.h" + +using namespace llvm; + +// The generated AsmMatcher SparcGenAsmMatcher uses "Sparc" as the target +// namespace. But SPARC backend uses "SP" as its namespace. +namespace llvm { + namespace Sparc { + using namespace SP; + } +} + +namespace { +class SparcOperand; +class SparcAsmParser : public MCTargetAsmParser { + + MCAsmParser &Parser; + + /// @name Auto-generated Match Functions + /// { + +#define GET_ASSEMBLER_HEADER +#include "SparcGenAsmMatcher.inc" + + /// } + + // public interface of the MCTargetAsmParser. + bool MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode, + OperandVector &Operands, MCStreamer &Out, + uint64_t &ErrorInfo, + bool MatchingInlineAsm) override; + bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc) override; + bool ParseInstruction(ParseInstructionInfo &Info, StringRef Name, + SMLoc NameLoc, OperandVector &Operands) override; + bool ParseDirective(AsmToken DirectiveID) override; + + unsigned validateTargetOperandClass(MCParsedAsmOperand &Op, + unsigned Kind) override; + + // Custom parse functions for Sparc specific operands. + OperandMatchResultTy parseMEMOperand(OperandVector &Operands); + + OperandMatchResultTy parseOperand(OperandVector &Operands, StringRef Name); + + OperandMatchResultTy + parseSparcAsmOperand(std::unique_ptr<SparcOperand> &Operand, + bool isCall = false); + + OperandMatchResultTy parseBranchModifiers(OperandVector &Operands); + + // Helper function for dealing with %lo / %hi in PIC mode. + const SparcMCExpr *adjustPICRelocation(SparcMCExpr::VariantKind VK, + const MCExpr *subExpr); + + // returns true if Tok is matched to a register and returns register in RegNo. + bool matchRegisterName(const AsmToken &Tok, unsigned &RegNo, + unsigned &RegKind); + + bool matchSparcAsmModifiers(const MCExpr *&EVal, SMLoc &EndLoc); + bool parseDirectiveWord(unsigned Size, SMLoc L); + + bool is64Bit() const { + return getSTI().getTargetTriple().getArch() == Triple::sparcv9; + } + + void expandSET(MCInst &Inst, SMLoc IDLoc, + SmallVectorImpl<MCInst> &Instructions); + +public: + SparcAsmParser(const MCSubtargetInfo &sti, MCAsmParser &parser, + const MCInstrInfo &MII, + const MCTargetOptions &Options) + : MCTargetAsmParser(Options, sti), Parser(parser) { + // Initialize the set of available features. + setAvailableFeatures(ComputeAvailableFeatures(getSTI().getFeatureBits())); + } + +}; + + static const MCPhysReg IntRegs[32] = { + Sparc::G0, Sparc::G1, Sparc::G2, Sparc::G3, + Sparc::G4, Sparc::G5, Sparc::G6, Sparc::G7, + Sparc::O0, Sparc::O1, Sparc::O2, Sparc::O3, + Sparc::O4, Sparc::O5, Sparc::O6, Sparc::O7, + Sparc::L0, Sparc::L1, Sparc::L2, Sparc::L3, + Sparc::L4, Sparc::L5, Sparc::L6, Sparc::L7, + Sparc::I0, Sparc::I1, Sparc::I2, Sparc::I3, + Sparc::I4, Sparc::I5, Sparc::I6, Sparc::I7 }; + + static const MCPhysReg FloatRegs[32] = { + Sparc::F0, Sparc::F1, Sparc::F2, Sparc::F3, + Sparc::F4, Sparc::F5, Sparc::F6, Sparc::F7, + Sparc::F8, Sparc::F9, Sparc::F10, Sparc::F11, + Sparc::F12, Sparc::F13, Sparc::F14, Sparc::F15, + Sparc::F16, Sparc::F17, Sparc::F18, Sparc::F19, + Sparc::F20, Sparc::F21, Sparc::F22, Sparc::F23, + Sparc::F24, Sparc::F25, Sparc::F26, Sparc::F27, + Sparc::F28, Sparc::F29, Sparc::F30, Sparc::F31 }; + + static const MCPhysReg DoubleRegs[32] = { + Sparc::D0, Sparc::D1, Sparc::D2, Sparc::D3, + Sparc::D4, Sparc::D5, Sparc::D6, Sparc::D7, + Sparc::D8, Sparc::D7, Sparc::D8, Sparc::D9, + Sparc::D12, Sparc::D13, Sparc::D14, Sparc::D15, + Sparc::D16, Sparc::D17, Sparc::D18, Sparc::D19, + Sparc::D20, Sparc::D21, Sparc::D22, Sparc::D23, + Sparc::D24, Sparc::D25, Sparc::D26, Sparc::D27, + Sparc::D28, Sparc::D29, Sparc::D30, Sparc::D31 }; + + static const MCPhysReg QuadFPRegs[32] = { + Sparc::Q0, Sparc::Q1, Sparc::Q2, Sparc::Q3, + Sparc::Q4, Sparc::Q5, Sparc::Q6, Sparc::Q7, + Sparc::Q8, Sparc::Q9, Sparc::Q10, Sparc::Q11, + Sparc::Q12, Sparc::Q13, Sparc::Q14, Sparc::Q15 }; + + static const MCPhysReg ASRRegs[32] = { + SP::Y, SP::ASR1, SP::ASR2, SP::ASR3, + SP::ASR4, SP::ASR5, SP::ASR6, SP::ASR7, + SP::ASR8, SP::ASR9, SP::ASR10, SP::ASR11, + SP::ASR12, SP::ASR13, SP::ASR14, SP::ASR15, + SP::ASR16, SP::ASR17, SP::ASR18, SP::ASR19, + SP::ASR20, SP::ASR21, SP::ASR22, SP::ASR23, + SP::ASR24, SP::ASR25, SP::ASR26, SP::ASR27, + SP::ASR28, SP::ASR29, SP::ASR30, SP::ASR31}; + + static const MCPhysReg IntPairRegs[] = { + Sparc::G0_G1, Sparc::G2_G3, Sparc::G4_G5, Sparc::G6_G7, + Sparc::O0_O1, Sparc::O2_O3, Sparc::O4_O5, Sparc::O6_O7, + Sparc::L0_L1, Sparc::L2_L3, Sparc::L4_L5, Sparc::L6_L7, + Sparc::I0_I1, Sparc::I2_I3, Sparc::I4_I5, Sparc::I6_I7}; + +/// SparcOperand - Instances of this class represent a parsed Sparc machine +/// instruction. +class SparcOperand : public MCParsedAsmOperand { +public: + enum RegisterKind { + rk_None, + rk_IntReg, + rk_IntPairReg, + rk_FloatReg, + rk_DoubleReg, + rk_QuadReg, + rk_Special, + }; + +private: + enum KindTy { + k_Token, + k_Register, + k_Immediate, + k_MemoryReg, + k_MemoryImm + } Kind; + + SMLoc StartLoc, EndLoc; + + struct Token { + const char *Data; + unsigned Length; + }; + + struct RegOp { + unsigned RegNum; + RegisterKind Kind; + }; + + struct ImmOp { + const MCExpr *Val; + }; + + struct MemOp { + unsigned Base; + unsigned OffsetReg; + const MCExpr *Off; + }; + + union { + struct Token Tok; + struct RegOp Reg; + struct ImmOp Imm; + struct MemOp Mem; + }; +public: + SparcOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {} + + bool isToken() const override { return Kind == k_Token; } + bool isReg() const override { return Kind == k_Register; } + bool isImm() const override { return Kind == k_Immediate; } + bool isMem() const override { return isMEMrr() || isMEMri(); } + bool isMEMrr() const { return Kind == k_MemoryReg; } + bool isMEMri() const { return Kind == k_MemoryImm; } + + bool isIntReg() const { + return (Kind == k_Register && Reg.Kind == rk_IntReg); + } + + bool isFloatReg() const { + return (Kind == k_Register && Reg.Kind == rk_FloatReg); + } + + bool isFloatOrDoubleReg() const { + return (Kind == k_Register && (Reg.Kind == rk_FloatReg + || Reg.Kind == rk_DoubleReg)); + } + + + StringRef getToken() const { + assert(Kind == k_Token && "Invalid access!"); + return StringRef(Tok.Data, Tok.Length); + } + + unsigned getReg() const override { + assert((Kind == k_Register) && "Invalid access!"); + return Reg.RegNum; + } + + const MCExpr *getImm() const { + assert((Kind == k_Immediate) && "Invalid access!"); + return Imm.Val; + } + + unsigned getMemBase() const { + assert((Kind == k_MemoryReg || Kind == k_MemoryImm) && "Invalid access!"); + return Mem.Base; + } + + unsigned getMemOffsetReg() const { + assert((Kind == k_MemoryReg) && "Invalid access!"); + return Mem.OffsetReg; + } + + const MCExpr *getMemOff() const { + assert((Kind == k_MemoryImm) && "Invalid access!"); + return Mem.Off; + } + + /// getStartLoc - Get the location of the first token of this operand. + SMLoc getStartLoc() const override { + return StartLoc; + } + /// getEndLoc - Get the location of the last token of this operand. + SMLoc getEndLoc() const override { + return EndLoc; + } + + void print(raw_ostream &OS) const override { + switch (Kind) { + case k_Token: OS << "Token: " << getToken() << "\n"; break; + case k_Register: OS << "Reg: #" << getReg() << "\n"; break; + case k_Immediate: OS << "Imm: " << getImm() << "\n"; break; + case k_MemoryReg: OS << "Mem: " << getMemBase() << "+" + << getMemOffsetReg() << "\n"; break; + case k_MemoryImm: assert(getMemOff() != nullptr); + OS << "Mem: " << getMemBase() + << "+" << *getMemOff() + << "\n"; break; + } + } + + void addRegOperands(MCInst &Inst, unsigned N) const { + assert(N == 1 && "Invalid number of operands!"); + Inst.addOperand(MCOperand::createReg(getReg())); + } + + void addImmOperands(MCInst &Inst, unsigned N) const { + assert(N == 1 && "Invalid number of operands!"); + const MCExpr *Expr = getImm(); + addExpr(Inst, Expr); + } + + void addExpr(MCInst &Inst, const MCExpr *Expr) const{ + // Add as immediate when possible. Null MCExpr = 0. + if (!Expr) + Inst.addOperand(MCOperand::createImm(0)); + else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr)) + Inst.addOperand(MCOperand::createImm(CE->getValue())); + else + Inst.addOperand(MCOperand::createExpr(Expr)); + } + + void addMEMrrOperands(MCInst &Inst, unsigned N) const { + assert(N == 2 && "Invalid number of operands!"); + + Inst.addOperand(MCOperand::createReg(getMemBase())); + + assert(getMemOffsetReg() != 0 && "Invalid offset"); + Inst.addOperand(MCOperand::createReg(getMemOffsetReg())); + } + + void addMEMriOperands(MCInst &Inst, unsigned N) const { + assert(N == 2 && "Invalid number of operands!"); + + Inst.addOperand(MCOperand::createReg(getMemBase())); + + const MCExpr *Expr = getMemOff(); + addExpr(Inst, Expr); + } + + static std::unique_ptr<SparcOperand> CreateToken(StringRef Str, SMLoc S) { + auto Op = make_unique<SparcOperand>(k_Token); + Op->Tok.Data = Str.data(); + Op->Tok.Length = Str.size(); + Op->StartLoc = S; + Op->EndLoc = S; + return Op; + } + + static std::unique_ptr<SparcOperand> CreateReg(unsigned RegNum, unsigned Kind, + SMLoc S, SMLoc E) { + auto Op = make_unique<SparcOperand>(k_Register); + Op->Reg.RegNum = RegNum; + Op->Reg.Kind = (SparcOperand::RegisterKind)Kind; + Op->StartLoc = S; + Op->EndLoc = E; + return Op; + } + + static std::unique_ptr<SparcOperand> CreateImm(const MCExpr *Val, SMLoc S, + SMLoc E) { + auto Op = make_unique<SparcOperand>(k_Immediate); + Op->Imm.Val = Val; + Op->StartLoc = S; + Op->EndLoc = E; + return Op; + } + + static bool MorphToIntPairReg(SparcOperand &Op) { + unsigned Reg = Op.getReg(); + assert(Op.Reg.Kind == rk_IntReg); + unsigned regIdx = 32; + if (Reg >= Sparc::G0 && Reg <= Sparc::G7) + regIdx = Reg - Sparc::G0; + else if (Reg >= Sparc::O0 && Reg <= Sparc::O7) + regIdx = Reg - Sparc::O0 + 8; + else if (Reg >= Sparc::L0 && Reg <= Sparc::L7) + regIdx = Reg - Sparc::L0 + 16; + else if (Reg >= Sparc::I0 && Reg <= Sparc::I7) + regIdx = Reg - Sparc::I0 + 24; + if (regIdx % 2 || regIdx > 31) + return false; + Op.Reg.RegNum = IntPairRegs[regIdx / 2]; + Op.Reg.Kind = rk_IntPairReg; + return true; + } + + static bool MorphToDoubleReg(SparcOperand &Op) { + unsigned Reg = Op.getReg(); + assert(Op.Reg.Kind == rk_FloatReg); + unsigned regIdx = Reg - Sparc::F0; + if (regIdx % 2 || regIdx > 31) + return false; + Op.Reg.RegNum = DoubleRegs[regIdx / 2]; + Op.Reg.Kind = rk_DoubleReg; + return true; + } + + static bool MorphToQuadReg(SparcOperand &Op) { + unsigned Reg = Op.getReg(); + unsigned regIdx = 0; + switch (Op.Reg.Kind) { + default: llvm_unreachable("Unexpected register kind!"); + case rk_FloatReg: + regIdx = Reg - Sparc::F0; + if (regIdx % 4 || regIdx > 31) + return false; + Reg = QuadFPRegs[regIdx / 4]; + break; + case rk_DoubleReg: + regIdx = Reg - Sparc::D0; + if (regIdx % 2 || regIdx > 31) + return false; + Reg = QuadFPRegs[regIdx / 2]; + break; + } + Op.Reg.RegNum = Reg; + Op.Reg.Kind = rk_QuadReg; + return true; + } + + static std::unique_ptr<SparcOperand> + MorphToMEMrr(unsigned Base, std::unique_ptr<SparcOperand> Op) { + unsigned offsetReg = Op->getReg(); + Op->Kind = k_MemoryReg; + Op->Mem.Base = Base; + Op->Mem.OffsetReg = offsetReg; + Op->Mem.Off = nullptr; + return Op; + } + + static std::unique_ptr<SparcOperand> + CreateMEMr(unsigned Base, SMLoc S, SMLoc E) { + auto Op = make_unique<SparcOperand>(k_MemoryReg); + Op->Mem.Base = Base; + Op->Mem.OffsetReg = Sparc::G0; // always 0 + Op->Mem.Off = nullptr; + Op->StartLoc = S; + Op->EndLoc = E; + return Op; + } + + static std::unique_ptr<SparcOperand> + MorphToMEMri(unsigned Base, std::unique_ptr<SparcOperand> Op) { + const MCExpr *Imm = Op->getImm(); + Op->Kind = k_MemoryImm; + Op->Mem.Base = Base; + Op->Mem.OffsetReg = 0; + Op->Mem.Off = Imm; + return Op; + } +}; + +} // end namespace + +void SparcAsmParser::expandSET(MCInst &Inst, SMLoc IDLoc, + SmallVectorImpl<MCInst> &Instructions) { + MCOperand MCRegOp = Inst.getOperand(0); + MCOperand MCValOp = Inst.getOperand(1); + assert(MCRegOp.isReg()); + assert(MCValOp.isImm() || MCValOp.isExpr()); + + // the imm operand can be either an expression or an immediate. + bool IsImm = Inst.getOperand(1).isImm(); + int64_t RawImmValue = IsImm ? MCValOp.getImm() : 0; + + // Allow either a signed or unsigned 32-bit immediate. + if (RawImmValue < -2147483648LL || RawImmValue > 4294967295LL) { + Error(IDLoc, "set: argument must be between -2147483648 and 4294967295"); + return; + } + + // If the value was expressed as a large unsigned number, that's ok. + // We want to see if it "looks like" a small signed number. + int32_t ImmValue = RawImmValue; + // For 'set' you can't use 'or' with a negative operand on V9 because + // that would splat the sign bit across the upper half of the destination + // register, whereas 'set' is defined to zero the high 32 bits. + bool IsEffectivelyImm13 = + IsImm && ((is64Bit() ? 0 : -4096) <= ImmValue && ImmValue < 4096); + const MCExpr *ValExpr; + if (IsImm) + ValExpr = MCConstantExpr::create(ImmValue, getContext()); + else + ValExpr = MCValOp.getExpr(); + + MCOperand PrevReg = MCOperand::createReg(Sparc::G0); + + // If not just a signed imm13 value, then either we use a 'sethi' with a + // following 'or', or a 'sethi' by itself if there are no more 1 bits. + // In either case, start with the 'sethi'. + if (!IsEffectivelyImm13) { + MCInst TmpInst; + const MCExpr *Expr = adjustPICRelocation(SparcMCExpr::VK_Sparc_HI, ValExpr); + TmpInst.setLoc(IDLoc); + TmpInst.setOpcode(SP::SETHIi); + TmpInst.addOperand(MCRegOp); + TmpInst.addOperand(MCOperand::createExpr(Expr)); + Instructions.push_back(TmpInst); + PrevReg = MCRegOp; + } + + // The low bits require touching in 3 cases: + // * A non-immediate value will always require both instructions. + // * An effectively imm13 value needs only an 'or' instruction. + // * Otherwise, an immediate that is not effectively imm13 requires the + // 'or' only if bits remain after clearing the 22 bits that 'sethi' set. + // If the low bits are known zeros, there's nothing to do. + // In the second case, and only in that case, must we NOT clear + // bits of the immediate value via the %lo() assembler function. + // Note also, the 'or' instruction doesn't mind a large value in the case + // where the operand to 'set' was 0xFFFFFzzz - it does exactly what you mean. + if (!IsImm || IsEffectivelyImm13 || (ImmValue & 0x3ff)) { + MCInst TmpInst; + const MCExpr *Expr; + if (IsEffectivelyImm13) + Expr = ValExpr; + else + Expr = adjustPICRelocation(SparcMCExpr::VK_Sparc_LO, ValExpr); + TmpInst.setLoc(IDLoc); + TmpInst.setOpcode(SP::ORri); + TmpInst.addOperand(MCRegOp); + TmpInst.addOperand(PrevReg); + TmpInst.addOperand(MCOperand::createExpr(Expr)); + Instructions.push_back(TmpInst); + } +} + +bool SparcAsmParser::MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode, + OperandVector &Operands, + MCStreamer &Out, + uint64_t &ErrorInfo, + bool MatchingInlineAsm) { + MCInst Inst; + SmallVector<MCInst, 8> Instructions; + unsigned MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo, + MatchingInlineAsm); + switch (MatchResult) { + case Match_Success: { + switch (Inst.getOpcode()) { + default: + Inst.setLoc(IDLoc); + Instructions.push_back(Inst); + break; + case SP::SET: + expandSET(Inst, IDLoc, Instructions); + break; + } + + for (const MCInst &I : Instructions) { + Out.EmitInstruction(I, getSTI()); + } + return false; + } + + case Match_MissingFeature: + return Error(IDLoc, + "instruction requires a CPU feature not currently enabled"); + + case Match_InvalidOperand: { + SMLoc ErrorLoc = IDLoc; + if (ErrorInfo != ~0ULL) { + if (ErrorInfo >= Operands.size()) + return Error(IDLoc, "too few operands for instruction"); + + ErrorLoc = ((SparcOperand &)*Operands[ErrorInfo]).getStartLoc(); + if (ErrorLoc == SMLoc()) + ErrorLoc = IDLoc; + } + + return Error(ErrorLoc, "invalid operand for instruction"); + } + case Match_MnemonicFail: + return Error(IDLoc, "invalid instruction mnemonic"); + } + llvm_unreachable("Implement any new match types added!"); +} + +bool SparcAsmParser:: +ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc) +{ + const AsmToken &Tok = Parser.getTok(); + StartLoc = Tok.getLoc(); + EndLoc = Tok.getEndLoc(); + RegNo = 0; + if (getLexer().getKind() != AsmToken::Percent) + return false; + Parser.Lex(); + unsigned regKind = SparcOperand::rk_None; + if (matchRegisterName(Tok, RegNo, regKind)) { + Parser.Lex(); + return false; + } + + return Error(StartLoc, "invalid register name"); +} + +static void applyMnemonicAliases(StringRef &Mnemonic, uint64_t Features, + unsigned VariantID); + +bool SparcAsmParser::ParseInstruction(ParseInstructionInfo &Info, + StringRef Name, SMLoc NameLoc, + OperandVector &Operands) { + + // First operand in MCInst is instruction mnemonic. + Operands.push_back(SparcOperand::CreateToken(Name, NameLoc)); + + // apply mnemonic aliases, if any, so that we can parse operands correctly. + applyMnemonicAliases(Name, getAvailableFeatures(), 0); + + if (getLexer().isNot(AsmToken::EndOfStatement)) { + // Read the first operand. + if (getLexer().is(AsmToken::Comma)) { + if (parseBranchModifiers(Operands) != MatchOperand_Success) { + SMLoc Loc = getLexer().getLoc(); + Parser.eatToEndOfStatement(); + return Error(Loc, "unexpected token"); + } + } + if (parseOperand(Operands, Name) != MatchOperand_Success) { + SMLoc Loc = getLexer().getLoc(); + Parser.eatToEndOfStatement(); + return Error(Loc, "unexpected token"); + } + + while (getLexer().is(AsmToken::Comma)) { + Parser.Lex(); // Eat the comma. + // Parse and remember the operand. + if (parseOperand(Operands, Name) != MatchOperand_Success) { + SMLoc Loc = getLexer().getLoc(); + Parser.eatToEndOfStatement(); + return Error(Loc, "unexpected token"); + } + } + } + if (getLexer().isNot(AsmToken::EndOfStatement)) { + SMLoc Loc = getLexer().getLoc(); + Parser.eatToEndOfStatement(); + return Error(Loc, "unexpected token"); + } + Parser.Lex(); // Consume the EndOfStatement. + return false; +} + +bool SparcAsmParser:: +ParseDirective(AsmToken DirectiveID) +{ + StringRef IDVal = DirectiveID.getString(); + + if (IDVal == ".byte") + return parseDirectiveWord(1, DirectiveID.getLoc()); + + if (IDVal == ".half") + return parseDirectiveWord(2, DirectiveID.getLoc()); + + if (IDVal == ".word") + return parseDirectiveWord(4, DirectiveID.getLoc()); + + if (IDVal == ".nword") + return parseDirectiveWord(is64Bit() ? 8 : 4, DirectiveID.getLoc()); + + if (is64Bit() && IDVal == ".xword") + return parseDirectiveWord(8, DirectiveID.getLoc()); + + if (IDVal == ".register") { + // For now, ignore .register directive. + Parser.eatToEndOfStatement(); + return false; + } + + // Let the MC layer to handle other directives. + return true; +} + +bool SparcAsmParser:: parseDirectiveWord(unsigned Size, SMLoc L) { + if (getLexer().isNot(AsmToken::EndOfStatement)) { + for (;;) { + const MCExpr *Value; + if (getParser().parseExpression(Value)) + return true; + + getParser().getStreamer().EmitValue(Value, Size); + + if (getLexer().is(AsmToken::EndOfStatement)) + break; + + // FIXME: Improve diagnostic. + if (getLexer().isNot(AsmToken::Comma)) + return Error(L, "unexpected token in directive"); + Parser.Lex(); + } + } + Parser.Lex(); + return false; +} + +SparcAsmParser::OperandMatchResultTy +SparcAsmParser::parseMEMOperand(OperandVector &Operands) { + + SMLoc S, E; + unsigned BaseReg = 0; + + if (ParseRegister(BaseReg, S, E)) { + return MatchOperand_NoMatch; + } + + switch (getLexer().getKind()) { + default: return MatchOperand_NoMatch; + + case AsmToken::Comma: + case AsmToken::RBrac: + case AsmToken::EndOfStatement: + Operands.push_back(SparcOperand::CreateMEMr(BaseReg, S, E)); + return MatchOperand_Success; + + case AsmToken:: Plus: + Parser.Lex(); // Eat the '+' + break; + case AsmToken::Minus: + break; + } + + std::unique_ptr<SparcOperand> Offset; + OperandMatchResultTy ResTy = parseSparcAsmOperand(Offset); + if (ResTy != MatchOperand_Success || !Offset) + return MatchOperand_NoMatch; + + Operands.push_back( + Offset->isImm() ? SparcOperand::MorphToMEMri(BaseReg, std::move(Offset)) + : SparcOperand::MorphToMEMrr(BaseReg, std::move(Offset))); + + return MatchOperand_Success; +} + +SparcAsmParser::OperandMatchResultTy +SparcAsmParser::parseOperand(OperandVector &Operands, StringRef Mnemonic) { + + OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic); + + // If there wasn't a custom match, try the generic matcher below. Otherwise, + // there was a match, but an error occurred, in which case, just return that + // the operand parsing failed. + if (ResTy == MatchOperand_Success || ResTy == MatchOperand_ParseFail) + return ResTy; + + if (getLexer().is(AsmToken::LBrac)) { + // Memory operand + Operands.push_back(SparcOperand::CreateToken("[", + Parser.getTok().getLoc())); + Parser.Lex(); // Eat the [ + + if (Mnemonic == "cas" || Mnemonic == "casx") { + SMLoc S = Parser.getTok().getLoc(); + if (getLexer().getKind() != AsmToken::Percent) + return MatchOperand_NoMatch; + Parser.Lex(); // eat % + + unsigned RegNo, RegKind; + if (!matchRegisterName(Parser.getTok(), RegNo, RegKind)) + return MatchOperand_NoMatch; + + Parser.Lex(); // Eat the identifier token. + SMLoc E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer()-1); + Operands.push_back(SparcOperand::CreateReg(RegNo, RegKind, S, E)); + ResTy = MatchOperand_Success; + } else { + ResTy = parseMEMOperand(Operands); + } + + if (ResTy != MatchOperand_Success) + return ResTy; + + if (!getLexer().is(AsmToken::RBrac)) + return MatchOperand_ParseFail; + + Operands.push_back(SparcOperand::CreateToken("]", + Parser.getTok().getLoc())); + Parser.Lex(); // Eat the ] + + // Parse an optional address-space identifier after the address. + if (getLexer().is(AsmToken::Integer)) { + std::unique_ptr<SparcOperand> Op; + ResTy = parseSparcAsmOperand(Op, false); + if (ResTy != MatchOperand_Success || !Op) + return MatchOperand_ParseFail; + Operands.push_back(std::move(Op)); + } + return MatchOperand_Success; + } + + std::unique_ptr<SparcOperand> Op; + + ResTy = parseSparcAsmOperand(Op, (Mnemonic == "call")); + if (ResTy != MatchOperand_Success || !Op) + return MatchOperand_ParseFail; + + // Push the parsed operand into the list of operands + Operands.push_back(std::move(Op)); + + return MatchOperand_Success; +} + +SparcAsmParser::OperandMatchResultTy +SparcAsmParser::parseSparcAsmOperand(std::unique_ptr<SparcOperand> &Op, + bool isCall) { + + SMLoc S = Parser.getTok().getLoc(); + SMLoc E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1); + const MCExpr *EVal; + + Op = nullptr; + switch (getLexer().getKind()) { + default: break; + + case AsmToken::Percent: + Parser.Lex(); // Eat the '%'. + unsigned RegNo; + unsigned RegKind; + if (matchRegisterName(Parser.getTok(), RegNo, RegKind)) { + StringRef name = Parser.getTok().getString(); + Parser.Lex(); // Eat the identifier token. + E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1); + switch (RegNo) { + default: + Op = SparcOperand::CreateReg(RegNo, RegKind, S, E); + break; + case Sparc::PSR: + Op = SparcOperand::CreateToken("%psr", S); + break; + case Sparc::FSR: + Op = SparcOperand::CreateToken("%fsr", S); + break; + case Sparc::WIM: + Op = SparcOperand::CreateToken("%wim", S); + break; + case Sparc::TBR: + Op = SparcOperand::CreateToken("%tbr", S); + break; + case Sparc::ICC: + if (name == "xcc") + Op = SparcOperand::CreateToken("%xcc", S); + else + Op = SparcOperand::CreateToken("%icc", S); + break; + } + break; + } + if (matchSparcAsmModifiers(EVal, E)) { + E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1); + Op = SparcOperand::CreateImm(EVal, S, E); + } + break; + + case AsmToken::Minus: + case AsmToken::Integer: + case AsmToken::LParen: + case AsmToken::Dot: + if (!getParser().parseExpression(EVal, E)) + Op = SparcOperand::CreateImm(EVal, S, E); + break; + + case AsmToken::Identifier: { + StringRef Identifier; + if (!getParser().parseIdentifier(Identifier)) { + E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1); + MCSymbol *Sym = getContext().getOrCreateSymbol(Identifier); + + const MCExpr *Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None, + getContext()); + if (isCall && + getContext().getObjectFileInfo()->getRelocM() == Reloc::PIC_) + Res = SparcMCExpr::create(SparcMCExpr::VK_Sparc_WPLT30, Res, + getContext()); + Op = SparcOperand::CreateImm(Res, S, E); + } + break; + } + } + return (Op) ? MatchOperand_Success : MatchOperand_ParseFail; +} + +SparcAsmParser::OperandMatchResultTy +SparcAsmParser::parseBranchModifiers(OperandVector &Operands) { + + // parse (,a|,pn|,pt)+ + + while (getLexer().is(AsmToken::Comma)) { + + Parser.Lex(); // Eat the comma + + if (!getLexer().is(AsmToken::Identifier)) + return MatchOperand_ParseFail; + StringRef modName = Parser.getTok().getString(); + if (modName == "a" || modName == "pn" || modName == "pt") { + Operands.push_back(SparcOperand::CreateToken(modName, + Parser.getTok().getLoc())); + Parser.Lex(); // eat the identifier. + } + } + return MatchOperand_Success; +} + +bool SparcAsmParser::matchRegisterName(const AsmToken &Tok, + unsigned &RegNo, + unsigned &RegKind) +{ + int64_t intVal = 0; + RegNo = 0; + RegKind = SparcOperand::rk_None; + if (Tok.is(AsmToken::Identifier)) { + StringRef name = Tok.getString(); + + // %fp + if (name.equals("fp")) { + RegNo = Sparc::I6; + RegKind = SparcOperand::rk_IntReg; + return true; + } + // %sp + if (name.equals("sp")) { + RegNo = Sparc::O6; + RegKind = SparcOperand::rk_IntReg; + return true; + } + + if (name.equals("y")) { + RegNo = Sparc::Y; + RegKind = SparcOperand::rk_Special; + return true; + } + + if (name.substr(0, 3).equals_lower("asr") + && !name.substr(3).getAsInteger(10, intVal) + && intVal > 0 && intVal < 32) { + RegNo = ASRRegs[intVal]; + RegKind = SparcOperand::rk_Special; + return true; + } + + // %fprs is an alias of %asr6. + if (name.equals("fprs")) { + RegNo = ASRRegs[6]; + RegKind = SparcOperand::rk_Special; + return true; + } + + if (name.equals("icc")) { + RegNo = Sparc::ICC; + RegKind = SparcOperand::rk_Special; + return true; + } + + if (name.equals("psr")) { + RegNo = Sparc::PSR; + RegKind = SparcOperand::rk_Special; + return true; + } + + if (name.equals("fsr")) { + RegNo = Sparc::FSR; + RegKind = SparcOperand::rk_Special; + return true; + } + + if (name.equals("wim")) { + RegNo = Sparc::WIM; + RegKind = SparcOperand::rk_Special; + return true; + } + + if (name.equals("tbr")) { + RegNo = Sparc::TBR; + RegKind = SparcOperand::rk_Special; + return true; + } + + if (name.equals("xcc")) { + // FIXME:: check 64bit. + RegNo = Sparc::ICC; + RegKind = SparcOperand::rk_Special; + return true; + } + + // %fcc0 - %fcc3 + if (name.substr(0, 3).equals_lower("fcc") + && !name.substr(3).getAsInteger(10, intVal) + && intVal < 4) { + // FIXME: check 64bit and handle %fcc1 - %fcc3 + RegNo = Sparc::FCC0 + intVal; + RegKind = SparcOperand::rk_Special; + return true; + } + + // %g0 - %g7 + if (name.substr(0, 1).equals_lower("g") + && !name.substr(1).getAsInteger(10, intVal) + && intVal < 8) { + RegNo = IntRegs[intVal]; + RegKind = SparcOperand::rk_IntReg; + return true; + } + // %o0 - %o7 + if (name.substr(0, 1).equals_lower("o") + && !name.substr(1).getAsInteger(10, intVal) + && intVal < 8) { + RegNo = IntRegs[8 + intVal]; + RegKind = SparcOperand::rk_IntReg; + return true; + } + if (name.substr(0, 1).equals_lower("l") + && !name.substr(1).getAsInteger(10, intVal) + && intVal < 8) { + RegNo = IntRegs[16 + intVal]; + RegKind = SparcOperand::rk_IntReg; + return true; + } + if (name.substr(0, 1).equals_lower("i") + && !name.substr(1).getAsInteger(10, intVal) + && intVal < 8) { + RegNo = IntRegs[24 + intVal]; + RegKind = SparcOperand::rk_IntReg; + return true; + } + // %f0 - %f31 + if (name.substr(0, 1).equals_lower("f") + && !name.substr(1, 2).getAsInteger(10, intVal) && intVal < 32) { + RegNo = FloatRegs[intVal]; + RegKind = SparcOperand::rk_FloatReg; + return true; + } + // %f32 - %f62 + if (name.substr(0, 1).equals_lower("f") + && !name.substr(1, 2).getAsInteger(10, intVal) + && intVal >= 32 && intVal <= 62 && (intVal % 2 == 0)) { + // FIXME: Check V9 + RegNo = DoubleRegs[intVal/2]; + RegKind = SparcOperand::rk_DoubleReg; + return true; + } + + // %r0 - %r31 + if (name.substr(0, 1).equals_lower("r") + && !name.substr(1, 2).getAsInteger(10, intVal) && intVal < 31) { + RegNo = IntRegs[intVal]; + RegKind = SparcOperand::rk_IntReg; + return true; + } + + if (name.equals("tpc")) { + RegNo = Sparc::TPC; + RegKind = SparcOperand::rk_Special; + return true; + } + if (name.equals("tnpc")) { + RegNo = Sparc::TNPC; + RegKind = SparcOperand::rk_Special; + return true; + } + if (name.equals("tstate")) { + RegNo = Sparc::TSTATE; + RegKind = SparcOperand::rk_Special; + return true; + } + if (name.equals("tt")) { + RegNo = Sparc::TT; + RegKind = SparcOperand::rk_Special; + return true; + } + if (name.equals("tick")) { + RegNo = Sparc::TICK; + RegKind = SparcOperand::rk_Special; + return true; + } + if (name.equals("tba")) { + RegNo = Sparc::TBA; + RegKind = SparcOperand::rk_Special; + return true; + } + if (name.equals("pstate")) { + RegNo = Sparc::PSTATE; + RegKind = SparcOperand::rk_Special; + return true; + } + if (name.equals("tl")) { + RegNo = Sparc::TL; + RegKind = SparcOperand::rk_Special; + return true; + } + if (name.equals("pil")) { + RegNo = Sparc::PIL; + RegKind = SparcOperand::rk_Special; + return true; + } + if (name.equals("cwp")) { + RegNo = Sparc::CWP; + RegKind = SparcOperand::rk_Special; + return true; + } + if (name.equals("cansave")) { + RegNo = Sparc::CANSAVE; + RegKind = SparcOperand::rk_Special; + return true; + } + if (name.equals("canrestore")) { + RegNo = Sparc::CANRESTORE; + RegKind = SparcOperand::rk_Special; + return true; + } + if (name.equals("cleanwin")) { + RegNo = Sparc::CLEANWIN; + RegKind = SparcOperand::rk_Special; + return true; + } + if (name.equals("otherwin")) { + RegNo = Sparc::OTHERWIN; + RegKind = SparcOperand::rk_Special; + return true; + } + if (name.equals("wstate")) { + RegNo = Sparc::WSTATE; + RegKind = SparcOperand::rk_Special; + return true; + } + } + return false; +} + +// Determine if an expression contains a reference to the symbol +// "_GLOBAL_OFFSET_TABLE_". +static bool hasGOTReference(const MCExpr *Expr) { + switch (Expr->getKind()) { + case MCExpr::Target: + if (const SparcMCExpr *SE = dyn_cast<SparcMCExpr>(Expr)) + return hasGOTReference(SE->getSubExpr()); + break; + + case MCExpr::Constant: + break; + + case MCExpr::Binary: { + const MCBinaryExpr *BE = cast<MCBinaryExpr>(Expr); + return hasGOTReference(BE->getLHS()) || hasGOTReference(BE->getRHS()); + } + + case MCExpr::SymbolRef: { + const MCSymbolRefExpr &SymRef = *cast<MCSymbolRefExpr>(Expr); + return (SymRef.getSymbol().getName() == "_GLOBAL_OFFSET_TABLE_"); + } + + case MCExpr::Unary: + return hasGOTReference(cast<MCUnaryExpr>(Expr)->getSubExpr()); + } + return false; +} + +const SparcMCExpr * +SparcAsmParser::adjustPICRelocation(SparcMCExpr::VariantKind VK, + const MCExpr *subExpr) +{ + // When in PIC mode, "%lo(...)" and "%hi(...)" behave differently. + // If the expression refers contains _GLOBAL_OFFSETE_TABLE, it is + // actually a %pc10 or %pc22 relocation. Otherwise, they are interpreted + // as %got10 or %got22 relocation. + + if (getContext().getObjectFileInfo()->getRelocM() == Reloc::PIC_) { + switch(VK) { + default: break; + case SparcMCExpr::VK_Sparc_LO: + VK = (hasGOTReference(subExpr) ? SparcMCExpr::VK_Sparc_PC10 + : SparcMCExpr::VK_Sparc_GOT10); + break; + case SparcMCExpr::VK_Sparc_HI: + VK = (hasGOTReference(subExpr) ? SparcMCExpr::VK_Sparc_PC22 + : SparcMCExpr::VK_Sparc_GOT22); + break; + } + } + + return SparcMCExpr::create(VK, subExpr, getContext()); +} + +bool SparcAsmParser::matchSparcAsmModifiers(const MCExpr *&EVal, + SMLoc &EndLoc) +{ + AsmToken Tok = Parser.getTok(); + if (!Tok.is(AsmToken::Identifier)) + return false; + + StringRef name = Tok.getString(); + + SparcMCExpr::VariantKind VK = SparcMCExpr::parseVariantKind(name); + + if (VK == SparcMCExpr::VK_Sparc_None) + return false; + + Parser.Lex(); // Eat the identifier. + if (Parser.getTok().getKind() != AsmToken::LParen) + return false; + + Parser.Lex(); // Eat the LParen token. + const MCExpr *subExpr; + if (Parser.parseParenExpression(subExpr, EndLoc)) + return false; + + EVal = adjustPICRelocation(VK, subExpr); + return true; +} + +extern "C" void LLVMInitializeSparcAsmParser() { + RegisterMCAsmParser<SparcAsmParser> A(TheSparcTarget); + RegisterMCAsmParser<SparcAsmParser> B(TheSparcV9Target); + RegisterMCAsmParser<SparcAsmParser> C(TheSparcelTarget); +} + +#define GET_REGISTER_MATCHER +#define GET_MATCHER_IMPLEMENTATION +#include "SparcGenAsmMatcher.inc" + +unsigned SparcAsmParser::validateTargetOperandClass(MCParsedAsmOperand &GOp, + unsigned Kind) { + SparcOperand &Op = (SparcOperand &)GOp; + if (Op.isFloatOrDoubleReg()) { + switch (Kind) { + default: break; + case MCK_DFPRegs: + if (!Op.isFloatReg() || SparcOperand::MorphToDoubleReg(Op)) + return MCTargetAsmParser::Match_Success; + break; + case MCK_QFPRegs: + if (SparcOperand::MorphToQuadReg(Op)) + return MCTargetAsmParser::Match_Success; + break; + } + } + if (Op.isIntReg() && Kind == MCK_IntPair) { + if (SparcOperand::MorphToIntPairReg(Op)) + return MCTargetAsmParser::Match_Success; + } + return Match_InvalidOperand; +} |
