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llvm / llvm-project / e01cefd85d52ea579fe8fd21fa7986c9e64119e1 / . / llvm / lib / Target / Sparc / AsmParser / SparcAsmParser.cpp
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//===-- SparcAsmParser.cpp - Parse Sparc assembly to MCInst instructions --===//
//
// 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/SparcMCExpr.h"
#include "MCTargetDesc/SparcMCTargetDesc.h"
#include "TargetInfo/SparcTargetInfo.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/MC/MCAsmMacro.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstBuilder.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCObjectFileInfo.h"
#include "llvm/MC/MCParser/MCAsmLexer.h"
#include "llvm/MC/MCParser/MCAsmParser.h"
#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
#include "llvm/MC/MCParser/MCTargetAsmParser.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/TargetRegistry.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/SMLoc.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/TargetParser/Triple.h"
#include <algorithm>
#include <cassert>
#include <cstdint>
#include <memory>
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;
} // end namespace Sparc
} // end namespace llvm
namespace {
class SparcOperand;
class SparcAsmParser : public MCTargetAsmParser {
MCAsmParser &Parser;
const MCRegisterInfo &MRI;
enum class TailRelocKind { Load_GOT, Add_TLS, Load_TLS, Call_TLS };
/// @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(MCRegister &Reg, SMLoc &StartLoc, SMLoc &EndLoc) override;
ParseStatus tryParseRegister(MCRegister &Reg, SMLoc &StartLoc,
SMLoc &EndLoc) override;
bool parseInstruction(ParseInstructionInfo &Info, StringRef Name,
SMLoc NameLoc, OperandVector &Operands) override;
ParseStatus parseDirective(AsmToken DirectiveID) override;
unsigned validateTargetOperandClass(MCParsedAsmOperand &Op,
unsigned Kind) override;
// Custom parse functions for Sparc specific operands.
ParseStatus parseMEMOperand(OperandVector &Operands);
ParseStatus parseMembarTag(OperandVector &Operands);
ParseStatus parseASITag(OperandVector &Operands);
ParseStatus parsePrefetchTag(OperandVector &Operands);
template <TailRelocKind Kind>
ParseStatus parseTailRelocSym(OperandVector &Operands);
template <unsigned N> ParseStatus parseShiftAmtImm(OperandVector &Operands);
ParseStatus parseCallTarget(OperandVector &Operands);
ParseStatus parseOperand(OperandVector &Operands, StringRef Name);
ParseStatus parseSparcAsmOperand(std::unique_ptr<SparcOperand> &Operand);
ParseStatus parseBranchModifiers(OperandVector &Operands);
ParseStatus parseExpression(int64_t &Val);
// Helper function for dealing with %lo / %hi in PIC mode.
const SparcMCExpr *adjustPICRelocation(SparcMCExpr::Specifier VK,
const MCExpr *subExpr);
// Helper function to see if current token can start an expression.
bool isPossibleExpression(const AsmToken &Token);
// Check if mnemonic is valid.
MatchResultTy mnemonicIsValid(StringRef Mnemonic, unsigned VariantID);
// returns true if Tok is matched to a register and returns register in RegNo.
MCRegister matchRegisterName(const AsmToken &Tok, unsigned &RegKind);
bool matchSparcAsmModifiers(const MCExpr *&EVal, SMLoc &EndLoc);
bool is64Bit() const {
return getSTI().getTargetTriple().getArch() == Triple::sparcv9;
}
bool expandSET(MCInst &Inst, SMLoc IDLoc,
SmallVectorImpl<MCInst> &Instructions);
bool expandSETSW(MCInst &Inst, SMLoc IDLoc,
SmallVectorImpl<MCInst> &Instructions);
bool expandSETX(MCInst &Inst, SMLoc IDLoc,
SmallVectorImpl<MCInst> &Instructions);
SMLoc getLoc() const { return getParser().getTok().getLoc(); }
public:
SparcAsmParser(const MCSubtargetInfo &sti, MCAsmParser &parser,
const MCInstrInfo &MII, const MCTargetOptions &Options)
: MCTargetAsmParser(Options, sti, MII), Parser(parser),
MRI(*Parser.getContext().getRegisterInfo()) {
Parser.addAliasForDirective(".half", ".2byte");
Parser.addAliasForDirective(".uahalf", ".2byte");
Parser.addAliasForDirective(".word", ".4byte");
Parser.addAliasForDirective(".uaword", ".4byte");
Parser.addAliasForDirective(".nword", is64Bit() ? ".8byte" : ".4byte");
if (is64Bit())
Parser.addAliasForDirective(".xword", ".8byte");
// Initialize the set of available features.
setAvailableFeatures(ComputeAvailableFeatures(getSTI().getFeatureBits()));
}
};
} // end anonymous namespace
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 DoubleRegs[32] = {
Sparc::D0, Sparc::D1, Sparc::D2, Sparc::D3,
Sparc::D4, Sparc::D5, Sparc::D6, Sparc::D7,
Sparc::D8, Sparc::D9, Sparc::D10, Sparc::D11,
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 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};
static const MCPhysReg CoprocPairRegs[] = {
Sparc::C0_C1, Sparc::C2_C3, Sparc::C4_C5, Sparc::C6_C7,
Sparc::C8_C9, Sparc::C10_C11, Sparc::C12_C13, Sparc::C14_C15,
Sparc::C16_C17, Sparc::C18_C19, Sparc::C20_C21, Sparc::C22_C23,
Sparc::C24_C25, Sparc::C26_C27, Sparc::C28_C29, Sparc::C30_C31};
namespace {
/// 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_CoprocReg,
rk_CoprocPairReg,
rk_Special,
};
private:
enum KindTy {
k_Token,
k_Register,
k_Immediate,
k_MemoryReg,
k_MemoryImm,
k_ASITag,
k_PrefetchTag,
k_TailRelocSym, // Special kind of immediate for TLS relocation purposes.
} 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;
unsigned ASI;
unsigned Prefetch;
};
public:
SparcOperand(KindTy K) : 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 isMembarTag() const { return Kind == k_Immediate; }
bool isASITag() const { return Kind == k_ASITag; }
bool isPrefetchTag() const { return Kind == k_PrefetchTag; }
bool isTailRelocSym() const { return Kind == k_TailRelocSym; }
bool isCallTarget() const {
if (!isImm())
return false;
if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Imm.Val))
return CE->getValue() % 4 == 0;
return true;
}
bool isShiftAmtImm5() const {
if (!isImm())
return false;
if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Imm.Val))
return isUInt<5>(CE->getValue());
return false;
}
bool isShiftAmtImm6() const {
if (!isImm())
return false;
if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Imm.Val))
return isUInt<6>(CE->getValue());
return false;
}
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));
}
bool isCoprocReg() const {
return (Kind == k_Register && Reg.Kind == rk_CoprocReg);
}
StringRef getToken() const {
assert(Kind == k_Token && "Invalid access!");
return StringRef(Tok.Data, Tok.Length);
}
MCRegister 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;
}
unsigned getASITag() const {
assert((Kind == k_ASITag) && "Invalid access!");
return ASI;
}
unsigned getPrefetchTag() const {
assert((Kind == k_PrefetchTag) && "Invalid access!");
return Prefetch;
}
const MCExpr *getTailRelocSym() const {
assert((Kind == k_TailRelocSym) && "Invalid access!");
return Imm.Val;
}
/// 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;
case k_ASITag:
OS << "ASI tag: " << getASITag() << "\n";
break;
case k_PrefetchTag:
OS << "Prefetch tag: " << getPrefetchTag() << "\n";
break;
case k_TailRelocSym:
OS << "TailReloc: " << getTailRelocSym() << "\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 addShiftAmtImm5Operands(MCInst &Inst, unsigned N) const {
assert(N == 1 && "Invalid number of operands!");
addExpr(Inst, getImm());
}
void addShiftAmtImm6Operands(MCInst &Inst, unsigned N) const {
assert(N == 1 && "Invalid number of operands!");
addExpr(Inst, getImm());
}
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);
}
void addASITagOperands(MCInst &Inst, unsigned N) const {
assert(N == 1 && "Invalid number of operands!");
Inst.addOperand(MCOperand::createImm(getASITag()));
}
void addPrefetchTagOperands(MCInst &Inst, unsigned N) const {
assert(N == 1 && "Invalid number of operands!");
Inst.addOperand(MCOperand::createImm(getPrefetchTag()));
}
void addMembarTagOperands(MCInst &Inst, unsigned N) const {
assert(N == 1 && "Invalid number of operands!");
const MCExpr *Expr = getImm();
addExpr(Inst, Expr);
}
void addCallTargetOperands(MCInst &Inst, unsigned N) const {
assert(N == 1 && "Invalid number of operands!");
addExpr(Inst, getImm());
}
void addTailRelocSymOperands(MCInst &Inst, unsigned N) const {
assert(N == 1 && "Invalid number of operands!");
addExpr(Inst, getTailRelocSym());
}
static std::unique_ptr<SparcOperand> CreateToken(StringRef Str, SMLoc S) {
auto Op = std::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 = std::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 = std::make_unique<SparcOperand>(k_Immediate);
Op->Imm.Val = Val;
Op->StartLoc = S;
Op->EndLoc = E;
return Op;
}
static std::unique_ptr<SparcOperand> CreateASITag(unsigned Val, SMLoc S,
SMLoc E) {
auto Op = std::make_unique<SparcOperand>(k_ASITag);
Op->ASI = Val;
Op->StartLoc = S;
Op->EndLoc = E;
return Op;
}
static std::unique_ptr<SparcOperand> CreatePrefetchTag(unsigned Val, SMLoc S,
SMLoc E) {
auto Op = std::make_unique<SparcOperand>(k_PrefetchTag);
Op->Prefetch = Val;
Op->StartLoc = S;
Op->EndLoc = E;
return Op;
}
static std::unique_ptr<SparcOperand> CreateTailRelocSym(const MCExpr *Val,
SMLoc S, SMLoc E) {
auto Op = std::make_unique<SparcOperand>(k_TailRelocSym);
Op->Imm.Val = Val;
Op->StartLoc = S;
Op->EndLoc = E;
return Op;
}
static bool MorphToIntPairReg(SparcOperand &Op) {
MCRegister 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) {
MCRegister 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) {
MCRegister 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 bool MorphToCoprocPairReg(SparcOperand &Op) {
MCRegister Reg = Op.getReg();
assert(Op.Reg.Kind == rk_CoprocReg);
unsigned regIdx = 32;
if (Reg >= Sparc::C0 && Reg <= Sparc::C31)
regIdx = Reg - Sparc::C0;
if (regIdx % 2 || regIdx > 31)
return false;
Op.Reg.RegNum = CoprocPairRegs[regIdx / 2];
Op.Reg.Kind = rk_CoprocPairReg;
return true;
}
static std::unique_ptr<SparcOperand>
MorphToMEMrr(unsigned Base, std::unique_ptr<SparcOperand> Op) {
MCRegister 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 = std::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 anonymous namespace
#define GET_MATCHER_IMPLEMENTATION
#define GET_REGISTER_MATCHER
#define GET_MNEMONIC_SPELL_CHECKER
#include "SparcGenAsmMatcher.inc"
// Use a custom function instead of the one from SparcGenAsmMatcher
// so we can differentiate between unavailable and unknown instructions.
SparcAsmParser::MatchResultTy
SparcAsmParser::mnemonicIsValid(StringRef Mnemonic, unsigned VariantID) {
// Process all MnemonicAliases to remap the mnemonic.
applyMnemonicAliases(Mnemonic, getAvailableFeatures(), VariantID);
// Find the appropriate table for this asm variant.
const MatchEntry *Start, *End;
switch (VariantID) {
default:
llvm_unreachable("invalid variant!");
case 0:
Start = std::begin(MatchTable0);
End = std::end(MatchTable0);
break;
}
// Search the table.
auto MnemonicRange = std::equal_range(Start, End, Mnemonic, LessOpcode());
if (MnemonicRange.first == MnemonicRange.second)
return Match_MnemonicFail;
for (const MatchEntry *it = MnemonicRange.first, *ie = MnemonicRange.second;
it != ie; ++it) {
const FeatureBitset &RequiredFeatures =
FeatureBitsets[it->RequiredFeaturesIdx];
if ((getAvailableFeatures() & RequiredFeatures) == RequiredFeatures)
return Match_Success;
}
return Match_MissingFeature;
}
bool 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) {
return Error(IDLoc,
"set: argument must be between -2147483648 and 4294967295");
}
// 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_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_LO, ValExpr);
TmpInst.setLoc(IDLoc);
TmpInst.setOpcode(SP::ORri);
TmpInst.addOperand(MCRegOp);
TmpInst.addOperand(PrevReg);
TmpInst.addOperand(MCOperand::createExpr(Expr));
Instructions.push_back(TmpInst);
}
return false;
}
bool SparcAsmParser::expandSETSW(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 ImmValue = IsImm ? MCValOp.getImm() : 0;
const MCExpr *ValExpr = IsImm ? MCConstantExpr::create(ImmValue, getContext())
: MCValOp.getExpr();
bool IsSmallImm = IsImm && isInt<13>(ImmValue);
bool NoLowBitsImm = IsImm && ((ImmValue & 0x3FF) == 0);
MCOperand PrevReg = MCOperand::createReg(Sparc::G0);
if (!isInt<32>(ImmValue)) {
return Error(IDLoc,
"set: argument must be between -2147483648 and 2147483647");
}
// Very small immediates can be expressed without emitting a sethi.
if (!IsSmallImm) {
// sethi %hi(val), rd
Instructions.push_back(
MCInstBuilder(SP::SETHIi)
.addReg(MCRegOp.getReg())
.addExpr(adjustPICRelocation(SparcMCExpr::VK_HI, ValExpr)));
PrevReg = MCRegOp;
}
// If the immediate has the lower bits set or is small, we need to emit an or.
if (!NoLowBitsImm || IsSmallImm) {
const MCExpr *Expr =
IsSmallImm ? ValExpr : adjustPICRelocation(SparcMCExpr::VK_LO, ValExpr);
// or rd, %lo(val), rd
Instructions.push_back(MCInstBuilder(SP::ORri)
.addReg(MCRegOp.getReg())
.addReg(PrevReg.getReg())
.addExpr(Expr));
// If it's a small immediate there's nothing more to do.
if (IsSmallImm)
return false;
}
// Large negative or non-immediate expressions would need an sra.
if (!IsImm || ImmValue < 0) {
// sra rd, %g0, rd
Instructions.push_back(MCInstBuilder(SP::SRArr)
.addReg(MCRegOp.getReg())
.addReg(MCRegOp.getReg())
.addReg(Sparc::G0));
}
return false;
}
bool SparcAsmParser::expandSETX(MCInst &Inst, SMLoc IDLoc,
SmallVectorImpl<MCInst> &Instructions) {
MCOperand MCRegOp = Inst.getOperand(0);
MCOperand MCValOp = Inst.getOperand(1);
MCOperand MCTmpOp = Inst.getOperand(2);
assert(MCRegOp.isReg() && MCTmpOp.isReg());
assert(MCValOp.isImm() || MCValOp.isExpr());
// the imm operand can be either an expression or an immediate.
bool IsImm = MCValOp.isImm();
int64_t ImmValue = IsImm ? MCValOp.getImm() : 0;
const MCExpr *ValExpr = IsImm ? MCConstantExpr::create(ImmValue, getContext())
: MCValOp.getExpr();
// Very small immediates can be expressed directly as a single `or`.
if (IsImm && isInt<13>(ImmValue)) {
// or rd, val, rd
Instructions.push_back(MCInstBuilder(SP::ORri)
.addReg(MCRegOp.getReg())
.addReg(Sparc::G0)
.addExpr(ValExpr));
return false;
}
// Otherwise, first we set the lower half of the register.
// sethi %hi(val), rd
Instructions.push_back(
MCInstBuilder(SP::SETHIi)
.addReg(MCRegOp.getReg())
.addExpr(adjustPICRelocation(SparcMCExpr::VK_HI, ValExpr)));
// or rd, %lo(val), rd
Instructions.push_back(
MCInstBuilder(SP::ORri)
.addReg(MCRegOp.getReg())
.addReg(MCRegOp.getReg())
.addExpr(adjustPICRelocation(SparcMCExpr::VK_LO, ValExpr)));
// Small positive immediates can be expressed as a single `sethi`+`or`
// combination, so we can just return here.
if (IsImm && isUInt<32>(ImmValue))
return false;
// For bigger immediates, we need to generate the upper half, then shift and
// merge it with the lower half that has just been generated above.
// sethi %hh(val), tmp
Instructions.push_back(
MCInstBuilder(SP::SETHIi)
.addReg(MCTmpOp.getReg())
.addExpr(adjustPICRelocation(SparcMCExpr::VK_HH, ValExpr)));
// or tmp, %hm(val), tmp
Instructions.push_back(
MCInstBuilder(SP::ORri)
.addReg(MCTmpOp.getReg())
.addReg(MCTmpOp.getReg())
.addExpr(adjustPICRelocation(SparcMCExpr::VK_HM, ValExpr)));
// sllx tmp, 32, tmp
Instructions.push_back(MCInstBuilder(SP::SLLXri)
.addReg(MCTmpOp.getReg())
.addReg(MCTmpOp.getReg())
.addImm(32));
// or tmp, rd, rd
Instructions.push_back(MCInstBuilder(SP::ORrr)
.addReg(MCRegOp.getReg())
.addReg(MCTmpOp.getReg())
.addReg(MCRegOp.getReg()));
return false;
}
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:
if (expandSET(Inst, IDLoc, Instructions))
return true;
break;
case SP::SETSW:
if (expandSETSW(Inst, IDLoc, Instructions))
return true;
break;
case SP::SETX:
if (expandSETX(Inst, IDLoc, Instructions))
return true;
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(MCRegister &Reg, SMLoc &StartLoc,
SMLoc &EndLoc) {
if (!tryParseRegister(Reg, StartLoc, EndLoc).isSuccess())
return Error(StartLoc, "invalid register name");
return false;
}
ParseStatus SparcAsmParser::tryParseRegister(MCRegister &Reg, SMLoc &StartLoc,
SMLoc &EndLoc) {
const AsmToken &Tok = Parser.getTok();
StartLoc = Tok.getLoc();
EndLoc = Tok.getEndLoc();
Reg = Sparc::NoRegister;
if (getLexer().getKind() != AsmToken::Percent)
return ParseStatus::NoMatch;
Parser.Lex();
unsigned RegKind = SparcOperand::rk_None;
Reg = matchRegisterName(Tok, RegKind);
if (Reg) {
Parser.Lex();
return ParseStatus::Success;
}
getLexer().UnLex(Tok);
return ParseStatus::NoMatch;
}
bool SparcAsmParser::parseInstruction(ParseInstructionInfo &Info,
StringRef Name, SMLoc NameLoc,
OperandVector &Operands) {
// Validate and reject unavailable mnemonics early before
// running any operand parsing.
// This is needed because some operands (mainly memory ones)
// differ between V8 and V9 ISA and so any operand parsing errors
// will cause IAS to bail out before it reaches matchAndEmitInstruction
// (where the instruction as a whole, including the mnemonic, is validated
// once again just before emission).
// As a nice side effect this also allows us to reject unknown
// instructions and suggest replacements.
MatchResultTy MS = mnemonicIsValid(Name, 0);
switch (MS) {
case Match_Success:
break;
case Match_MissingFeature:
return Error(NameLoc,
"instruction requires a CPU feature not currently enabled");
case Match_MnemonicFail:
return Error(NameLoc,
"invalid instruction mnemonic" +
SparcMnemonicSpellCheck(Name, getAvailableFeatures(), 0));
default:
llvm_unreachable("invalid return status!");
}
// 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).isSuccess()) {
SMLoc Loc = getLexer().getLoc();
return Error(Loc, "unexpected token");
}
}
if (!parseOperand(Operands, Name).isSuccess()) {
SMLoc Loc = getLexer().getLoc();
return Error(Loc, "unexpected token");
}
while (getLexer().is(AsmToken::Comma) || getLexer().is(AsmToken::Plus)) {
if (getLexer().is(AsmToken::Plus)) {
// Plus tokens are significant in software_traps (p83, sparcv8.pdf). We must capture them.
Operands.push_back(SparcOperand::CreateToken("+", Parser.getTok().getLoc()));
}
Parser.Lex(); // Eat the comma or plus.
// Parse and remember the operand.
if (!parseOperand(Operands, Name).isSuccess()) {
SMLoc Loc = getLexer().getLoc();
return Error(Loc, "unexpected token");
}
}
}
if (getLexer().isNot(AsmToken::EndOfStatement)) {
SMLoc Loc = getLexer().getLoc();
return Error(Loc, "unexpected token");
}
Parser.Lex(); // Consume the EndOfStatement.
return false;
}
ParseStatus SparcAsmParser::parseDirective(AsmToken DirectiveID) {
StringRef IDVal = DirectiveID.getString();
if (IDVal == ".register") {
// For now, ignore .register directive.
Parser.eatToEndOfStatement();
return ParseStatus::Success;
}
if (IDVal == ".proc") {
// For compatibility, ignore this directive.
// (It's supposed to be an "optimization" in the Sun assembler)
Parser.eatToEndOfStatement();
return ParseStatus::Success;
}
// Let the MC layer to handle other directives.
return ParseStatus::NoMatch;
}
ParseStatus SparcAsmParser::parseMEMOperand(OperandVector &Operands) {
SMLoc S, E;
std::unique_ptr<SparcOperand> LHS;
if (!parseSparcAsmOperand(LHS).isSuccess())
return ParseStatus::NoMatch;
// Single immediate operand
if (LHS->isImm()) {
Operands.push_back(SparcOperand::MorphToMEMri(Sparc::G0, std::move(LHS)));
return ParseStatus::Success;
}
if (!LHS->isIntReg())
return Error(LHS->getStartLoc(), "invalid register kind for this operand");
AsmToken Tok = getLexer().getTok();
// The plus token may be followed by a register or an immediate value, the
// minus one is always interpreted as sign for the immediate value
if (Tok.is(AsmToken::Plus) || Tok.is(AsmToken::Minus)) {
(void)Parser.parseOptionalToken(AsmToken::Plus);
std::unique_ptr<SparcOperand> RHS;
if (!parseSparcAsmOperand(RHS).isSuccess())
return ParseStatus::NoMatch;
if (RHS->isReg() && !RHS->isIntReg())
return Error(RHS->getStartLoc(),
"invalid register kind for this operand");
Operands.push_back(
RHS->isImm()
? SparcOperand::MorphToMEMri(LHS->getReg(), std::move(RHS))
: SparcOperand::MorphToMEMrr(LHS->getReg(), std::move(RHS)));
return ParseStatus::Success;
}
Operands.push_back(SparcOperand::CreateMEMr(LHS->getReg(), S, E));
return ParseStatus::Success;
}
template <unsigned N>
ParseStatus SparcAsmParser::parseShiftAmtImm(OperandVector &Operands) {
SMLoc S = Parser.getTok().getLoc();
SMLoc E = SMLoc::getFromPointer(S.getPointer() - 1);
// This is a register, not an immediate
if (getLexer().getKind() == AsmToken::Percent)
return ParseStatus::NoMatch;
const MCExpr *Expr;
if (getParser().parseExpression(Expr))
return ParseStatus::Failure;
const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
if (!CE)
return Error(S, "constant expression expected");
if (!isUInt<N>(CE->getValue()))
return Error(S, "immediate shift value out of range");
Operands.push_back(SparcOperand::CreateImm(Expr, S, E));
return ParseStatus::Success;
}
template <SparcAsmParser::TailRelocKind Kind>
ParseStatus SparcAsmParser::parseTailRelocSym(OperandVector &Operands) {
SMLoc S = getLoc();
SMLoc E = SMLoc::getFromPointer(S.getPointer() - 1);
auto MatchesKind = [](SparcMCExpr::Specifier VK) -> bool {
switch (Kind) {
case TailRelocKind::Load_GOT:
// Non-TLS relocations on ld (or ldx).
// ld [%rr + %rr], %rr, %rel(sym)
return VK == SparcMCExpr::VK_GOTDATA_OP;
case TailRelocKind::Add_TLS:
// TLS relocations on add.
// add %rr, %rr, %rr, %rel(sym)
switch (VK) {
case SparcMCExpr::VK_TLS_GD_ADD:
case SparcMCExpr::VK_TLS_IE_ADD:
case SparcMCExpr::VK_TLS_LDM_ADD:
case SparcMCExpr::VK_TLS_LDO_ADD:
return true;
default:
return false;
}
case TailRelocKind::Load_TLS:
// TLS relocations on ld (or ldx).
// ld[x] %addr, %rr, %rel(sym)
switch (VK) {
case SparcMCExpr::VK_TLS_IE_LD:
case SparcMCExpr::VK_TLS_IE_LDX:
return true;
default:
return false;
}
case TailRelocKind::Call_TLS:
// TLS relocations on call.
// call sym, %rel(sym)
switch (VK) {
case SparcMCExpr::VK_TLS_GD_CALL:
case SparcMCExpr::VK_TLS_LDM_CALL:
return true;
default:
return false;
}
}
llvm_unreachable("Unhandled SparcAsmParser::TailRelocKind enum");
};
if (getLexer().getKind() != AsmToken::Percent)
return ParseStatus::NoMatch;
const AsmToken Tok = Parser.getTok();
getParser().Lex(); // Eat '%'
if (getLexer().getKind() != AsmToken::Identifier)
return Error(getLoc(), "expected valid identifier for operand modifier");
StringRef Name = getParser().getTok().getIdentifier();
SparcMCExpr::Specifier VK = SparcMCExpr::parseSpecifier(Name);
if (VK == SparcMCExpr::VK_None)
return Error(getLoc(), "invalid relocation specifier");
if (!MatchesKind(VK)) {
// Did not match the specified set of relocation types, put '%' back.
getLexer().UnLex(Tok);
return ParseStatus::NoMatch;
}
Parser.Lex(); // Eat the identifier.
if (getLexer().getKind() != AsmToken::LParen)
return Error(getLoc(), "expected '('");
getParser().Lex(); // Eat '('
const MCExpr *SubExpr;
if (getParser().parseParenExpression(SubExpr, E))
return ParseStatus::Failure;
const MCExpr *Val = adjustPICRelocation(VK, SubExpr);
Operands.push_back(SparcOperand::CreateTailRelocSym(Val, S, E));
return ParseStatus::Success;
}
ParseStatus SparcAsmParser::parseMembarTag(OperandVector &Operands) {
SMLoc S = Parser.getTok().getLoc();
const MCExpr *EVal;
int64_t ImmVal = 0;
std::unique_ptr<SparcOperand> Mask;
if (parseSparcAsmOperand(Mask).isSuccess()) {
if (!Mask->isImm() || !Mask->getImm()->evaluateAsAbsolute(ImmVal) ||
ImmVal < 0 || ImmVal > 127)
return Error(S, "invalid membar mask number");
}
while (getLexer().getKind() == AsmToken::Hash) {
SMLoc TagStart = getLexer().getLoc();
Parser.Lex(); // Eat the '#'.
unsigned MaskVal = StringSwitch<unsigned>(Parser.getTok().getString())
.Case("LoadLoad", 0x1)
.Case("StoreLoad", 0x2)
.Case("LoadStore", 0x4)
.Case("StoreStore", 0x8)
.Case("Lookaside", 0x10)
.Case("MemIssue", 0x20)
.Case("Sync", 0x40)
.Default(0);
Parser.Lex(); // Eat the identifier token.
if (!MaskVal)
return Error(TagStart, "unknown membar tag");
ImmVal |= MaskVal;
if (getLexer().getKind() == AsmToken::Pipe)
Parser.Lex(); // Eat the '|'.
}
EVal = MCConstantExpr::create(ImmVal, getContext());
SMLoc E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
Operands.push_back(SparcOperand::CreateImm(EVal, S, E));
return ParseStatus::Success;
}
ParseStatus SparcAsmParser::parseASITag(OperandVector &Operands) {
SMLoc S = Parser.getTok().getLoc();
SMLoc E = Parser.getTok().getEndLoc();
int64_t ASIVal = 0;
if (getLexer().getKind() != AsmToken::Hash) {
// If the ASI tag provided is not a named tag, then it
// must be a constant expression.
ParseStatus ParseExprStatus = parseExpression(ASIVal);
if (!ParseExprStatus.isSuccess())
return ParseExprStatus;
if (!isUInt<8>(ASIVal))
return Error(S, "invalid ASI number, must be between 0 and 255");
Operands.push_back(SparcOperand::CreateASITag(ASIVal, S, E));
return ParseStatus::Success;
}
// For now we only support named tags for 64-bit/V9 systems.
// TODO: add support for 32-bit/V8 systems.
SMLoc TagStart = getLexer().peekTok(false).getLoc();
Parser.Lex(); // Eat the '#'.
const StringRef ASIName = Parser.getTok().getString();
const SparcASITag::ASITag *ASITag = SparcASITag::lookupASITagByName(ASIName);
if (!ASITag)
ASITag = SparcASITag::lookupASITagByAltName(ASIName);
Parser.Lex(); // Eat the identifier token.
if (!ASITag)
return Error(TagStart, "unknown ASI tag");
ASIVal = ASITag->Encoding;
Operands.push_back(SparcOperand::CreateASITag(ASIVal, S, E));
return ParseStatus::Success;
}
ParseStatus SparcAsmParser::parsePrefetchTag(OperandVector &Operands) {
SMLoc S = Parser.getTok().getLoc();
SMLoc E = Parser.getTok().getEndLoc();
int64_t PrefetchVal = 0;
if (getLexer().getKind() != AsmToken::Hash) {
// If the prefetch tag provided is not a named tag, then it
// must be a constant expression.
ParseStatus ParseExprStatus = parseExpression(PrefetchVal);
if (!ParseExprStatus.isSuccess())
return ParseExprStatus;
if (!isUInt<8>(PrefetchVal))
return Error(S, "invalid prefetch number, must be between 0 and 31");
Operands.push_back(SparcOperand::CreatePrefetchTag(PrefetchVal, S, E));
return ParseStatus::Success;
}
SMLoc TagStart = getLexer().peekTok(false).getLoc();
Parser.Lex(); // Eat the '#'.
const StringRef PrefetchName = Parser.getTok().getString();
const SparcPrefetchTag::PrefetchTag *PrefetchTag =
SparcPrefetchTag::lookupPrefetchTagByName(PrefetchName);
Parser.Lex(); // Eat the identifier token.
if (!PrefetchTag)
return Error(TagStart, "unknown prefetch tag");
PrefetchVal = PrefetchTag->Encoding;
Operands.push_back(SparcOperand::CreatePrefetchTag(PrefetchVal, S, E));
return ParseStatus::Success;
}
ParseStatus SparcAsmParser::parseCallTarget(OperandVector &Operands) {
SMLoc S = Parser.getTok().getLoc();
SMLoc E = SMLoc::getFromPointer(S.getPointer() - 1);
switch (getLexer().getKind()) {
default:
return ParseStatus::NoMatch;
case AsmToken::LParen:
case AsmToken::Integer:
case AsmToken::Identifier:
case AsmToken::Dot:
break;
}
const MCExpr *DestValue;
if (getParser().parseExpression(DestValue))
return ParseStatus::NoMatch;
bool IsPic = getContext().getObjectFileInfo()->isPositionIndependent();
SparcMCExpr::Specifier Kind =
IsPic ? SparcMCExpr::VK_WPLT30 : SparcMCExpr::VK_WDISP30;
const MCExpr *DestExpr = SparcMCExpr::create(Kind, DestValue, getContext());
Operands.push_back(SparcOperand::CreateImm(DestExpr, S, E));
return ParseStatus::Success;
}
ParseStatus SparcAsmParser::parseOperand(OperandVector &Operands,
StringRef Mnemonic) {
ParseStatus Res = 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 (Res.isSuccess() || Res.isFailure())
return Res;
if (getLexer().is(AsmToken::LBrac)) {
// Memory operand
Operands.push_back(SparcOperand::CreateToken("[",
Parser.getTok().getLoc()));
Parser.Lex(); // Eat the [
if (Mnemonic == "cas" || Mnemonic == "casl" || Mnemonic == "casa" ||
Mnemonic == "casx" || Mnemonic == "casxl" || Mnemonic == "casxa") {
SMLoc S = Parser.getTok().getLoc();
if (getLexer().getKind() != AsmToken::Percent)
return ParseStatus::NoMatch;
Parser.Lex(); // eat %
unsigned RegKind;
MCRegister Reg = matchRegisterName(Parser.getTok(), RegKind);
if (!Reg)
return ParseStatus::NoMatch;
Parser.Lex(); // Eat the identifier token.
SMLoc E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer()-1);
Operands.push_back(SparcOperand::CreateReg(Reg, RegKind, S, E));
Res = ParseStatus::Success;
} else {
Res = parseMEMOperand(Operands);
}
if (!Res.isSuccess())
return Res;
if (!getLexer().is(AsmToken::RBrac))
return ParseStatus::Failure;
Operands.push_back(SparcOperand::CreateToken("]",
Parser.getTok().getLoc()));
Parser.Lex(); // Eat the ]
// Parse an optional address-space identifier after the address.
// This will be either an immediate constant expression, or, on 64-bit
// processors, the %asi register.
if (getLexer().is(AsmToken::Percent)) {
SMLoc S = Parser.getTok().getLoc();
if (!is64Bit())
return Error(
S, "malformed ASI tag, must be a constant integer expression");
Parser.Lex(); // Eat the %.
const AsmToken Tok = Parser.getTok();
if (Tok.is(AsmToken::Identifier) && Tok.getString() == "asi") {
// Here we patch the MEM operand from [base + %g0] into [base + 0]
// as memory operations with ASI tag stored in %asi register needs
// to use immediate offset. We need to do this because Reg addressing
// will be parsed as Reg+G0 initially.
// This allows forms such as `ldxa [%o0] %asi, %o0` to parse correctly.
SparcOperand &OldMemOp = (SparcOperand &)*Operands[Operands.size() - 2];
if (OldMemOp.isMEMrr()) {
if (OldMemOp.getMemOffsetReg() != Sparc::G0) {
return Error(S, "invalid operand for instruction");
}
Operands[Operands.size() - 2] = SparcOperand::MorphToMEMri(
OldMemOp.getMemBase(),
SparcOperand::CreateImm(MCConstantExpr::create(0, getContext()),
OldMemOp.getStartLoc(),
OldMemOp.getEndLoc()));
}
Parser.Lex(); // Eat the identifier.
// In this context, we convert the register operand into
// a plain "%asi" token since the register access is already
// implicit in the instruction definition and encoding.
// See LoadASI/StoreASI in SparcInstrInfo.td.
Operands.push_back(SparcOperand::CreateToken("%asi", S));
return ParseStatus::Success;
}
return Error(S, "malformed ASI tag, must be %asi, a constant integer "
"expression, or a named tag");
}
// If we're not at the end of statement and the next token is not a comma,
// then it is an immediate ASI value.
if (getLexer().isNot(AsmToken::EndOfStatement) &&
getLexer().isNot(AsmToken::Comma))
return parseASITag(Operands);
return ParseStatus::Success;
}
std::unique_ptr<SparcOperand> Op;
Res = parseSparcAsmOperand(Op);
if (!Res.isSuccess() || !Op)
return ParseStatus::Failure;
// Push the parsed operand into the list of operands
Operands.push_back(std::move(Op));
return ParseStatus::Success;
}
ParseStatus
SparcAsmParser::parseSparcAsmOperand(std::unique_ptr<SparcOperand> &Op) {
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 RegKind;
if (MCRegister Reg = matchRegisterName(Parser.getTok(), RegKind)) {
StringRef Name = Parser.getTok().getString();
Parser.Lex(); // Eat the identifier token.
E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
if (Reg == Sparc::ICC && Name == "xcc")
Op = SparcOperand::CreateToken("%xcc", S);
else
Op = SparcOperand::CreateReg(Reg, RegKind, S, E);
break;
}
if (matchSparcAsmModifiers(EVal, E)) {
E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
Op = SparcOperand::CreateImm(EVal, S, E);
}
break;
}
case AsmToken::Plus:
case AsmToken::Minus:
case AsmToken::Integer:
case AsmToken::LParen:
case AsmToken::Dot:
case AsmToken::Identifier:
if (getParser().parseExpression(EVal, E))
break;
Op = SparcOperand::CreateImm(EVal, S, E);
break;
}
return Op ? ParseStatus::Success : ParseStatus::Failure;
}
ParseStatus SparcAsmParser::parseBranchModifiers(OperandVector &Operands) {
// parse (,a|,pn|,pt)+
while (getLexer().is(AsmToken::Comma)) {
Parser.Lex(); // Eat the comma
if (!getLexer().is(AsmToken::Identifier))
return ParseStatus::Failure;
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 ParseStatus::Success;
}
ParseStatus SparcAsmParser::parseExpression(int64_t &Val) {
AsmToken Tok = getLexer().getTok();
if (!isPossibleExpression(Tok))
return ParseStatus::NoMatch;
return getParser().parseAbsoluteExpression(Val);
}
MCRegister SparcAsmParser::matchRegisterName(const AsmToken &Tok,
unsigned &RegKind) {
RegKind = SparcOperand::rk_None;
if (!Tok.is(AsmToken::Identifier))
return SP::NoRegister;
StringRef Name = Tok.getString();
MCRegister Reg = MatchRegisterName(Name.lower());
if (!Reg)
Reg = MatchRegisterAltName(Name.lower());
if (Reg) {
// Some registers have identical spellings. The generated matcher might
// have chosen one or another spelling, e.g. "%fp" or "%i6" might have been
// matched to either SP::I6 or SP::I6_I7. Other parts of SparcAsmParser
// are not prepared for this, so we do some canonicalization.
// See the note in SparcRegisterInfo.td near ASRRegs register class.
if (Reg == SP::ASR4 && Name == "tick") {
RegKind = SparcOperand::rk_Special;
return SP::TICK;
}
if (MRI.getRegClass(SP::IntRegsRegClassID).contains(Reg)) {
RegKind = SparcOperand::rk_IntReg;
return Reg;
}
if (MRI.getRegClass(SP::FPRegsRegClassID).contains(Reg)) {
RegKind = SparcOperand::rk_FloatReg;
return Reg;
}
if (MRI.getRegClass(SP::CoprocRegsRegClassID).contains(Reg)) {
RegKind = SparcOperand::rk_CoprocReg;
return Reg;
}
// Canonicalize G0_G1 ... G30_G31 etc. to G0 ... G30.
if (MRI.getRegClass(SP::IntPairRegClassID).contains(Reg)) {
RegKind = SparcOperand::rk_IntReg;
return MRI.getSubReg(Reg, SP::sub_even);
}
// Canonicalize D0 ... D15 to F0 ... F30.
if (MRI.getRegClass(SP::DFPRegsRegClassID).contains(Reg)) {
// D16 ... D31 do not have sub-registers.
if (MCRegister SubReg = MRI.getSubReg(Reg, SP::sub_even)) {
RegKind = SparcOperand::rk_FloatReg;
return SubReg;
}
RegKind = SparcOperand::rk_DoubleReg;
return Reg;
}
// The generated matcher does not currently return QFP registers.
// If it changes, we will need to handle them in a similar way.
assert(!MRI.getRegClass(SP::QFPRegsRegClassID).contains(Reg));
// Canonicalize C0_C1 ... C30_C31 to C0 ... C30.
if (MRI.getRegClass(SP::CoprocPairRegClassID).contains(Reg)) {
RegKind = SparcOperand::rk_CoprocReg;
return MRI.getSubReg(Reg, SP::sub_even);
}
// Other registers do not need special handling.
RegKind = SparcOperand::rk_Special;
return Reg;
}
// If we still have no match, try custom parsing.
// Not all registers and their spellings are modeled in td files.
// %r0 - %r31
int64_t RegNo = 0;
if (Name.starts_with_insensitive("r") &&
!Name.substr(1, 2).getAsInteger(10, RegNo) && RegNo < 31) {
RegKind = SparcOperand::rk_IntReg;
return IntRegs[RegNo];
}
if (Name == "xcc") {
// FIXME:: check 64bit.
RegKind = SparcOperand::rk_Special;
return SP::ICC;
}
// JPS1 extension - aliases for ASRs
// Section 5.2.11 - Ancillary State Registers (ASRs)
if (Name == "pcr") {
RegKind = SparcOperand::rk_Special;
return SP::ASR16;
}
if (Name == "pic") {
RegKind = SparcOperand::rk_Special;
return SP::ASR17;
}
if (Name == "dcr") {
RegKind = SparcOperand::rk_Special;
return SP::ASR18;
}
if (Name == "gsr") {
RegKind = SparcOperand::rk_Special;
return SP::ASR19;
}
if (Name == "set_softint") {
RegKind = SparcOperand::rk_Special;
return SP::ASR20;
}
if (Name == "clear_softint") {
RegKind = SparcOperand::rk_Special;
return SP::ASR21;
}
if (Name == "softint") {
RegKind = SparcOperand::rk_Special;
return SP::ASR22;
}
if (Name == "tick_cmpr") {
RegKind = SparcOperand::rk_Special;
return SP::ASR23;
}
if (Name == "stick" || Name == "sys_tick") {
RegKind = SparcOperand::rk_Special;
return SP::ASR24;
}
if (Name == "stick_cmpr" || Name == "sys_tick_cmpr") {
RegKind = SparcOperand::rk_Special;
return SP::ASR25;
}
return SP::NoRegister;
}
// 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::Specifier VK,
const MCExpr *subExpr) {
// When in PIC mode, "%lo(...)" and "%hi(...)" behave differently.
// If the expression refers contains _GLOBAL_OFFSET_TABLE, it is
// actually a %pc10 or %pc22 relocation. Otherwise, they are interpreted
// as %got10 or %got22 relocation.
if (getContext().getObjectFileInfo()->isPositionIndependent()) {
switch(VK) {
default: break;
case SparcMCExpr::VK_LO:
VK = (hasGOTReference(subExpr) ? SparcMCExpr::VK_PC10
: SparcMCExpr::VK_GOT10);
break;
case SparcMCExpr::VK_HI:
VK = (hasGOTReference(subExpr) ? SparcMCExpr::VK_PC22
: SparcMCExpr::VK_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::Specifier VK = SparcMCExpr::parseSpecifier(name);
switch (VK) {
case SparcMCExpr::VK_None:
Error(getLoc(), "invalid relocation specifier");
return false;
case SparcMCExpr::VK_GOTDATA_OP:
case SparcMCExpr::VK_TLS_GD_ADD:
case SparcMCExpr::VK_TLS_GD_CALL:
case SparcMCExpr::VK_TLS_IE_ADD:
case SparcMCExpr::VK_TLS_IE_LD:
case SparcMCExpr::VK_TLS_IE_LDX:
case SparcMCExpr::VK_TLS_LDM_ADD:
case SparcMCExpr::VK_TLS_LDM_CALL:
case SparcMCExpr::VK_TLS_LDO_ADD:
// These are special-cased at tablegen level.
return false;
default:
break;
}
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;
}
bool SparcAsmParser::isPossibleExpression(const AsmToken &Token) {
switch (Token.getKind()) {
case AsmToken::LParen:
case AsmToken::Integer:
case AsmToken::Identifier:
case AsmToken::Plus:
case AsmToken::Minus:
case AsmToken::Tilde:
return true;
default:
return false;
}
}
extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeSparcAsmParser() {
RegisterMCAsmParser<SparcAsmParser> A(getTheSparcTarget());
RegisterMCAsmParser<SparcAsmParser> B(getTheSparcV9Target());
RegisterMCAsmParser<SparcAsmParser> C(getTheSparcelTarget());
}
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;
}
if (Op.isCoprocReg() && Kind == MCK_CoprocPair) {
if (SparcOperand::MorphToCoprocPairReg(Op))
return MCTargetAsmParser::Match_Success;
}
return Match_InvalidOperand;
}