#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCTargetAsmParser.h"
#include "llvm/Support/TargetRegistry.h"
+#include "llvm/ADT/APInt.h"
using namespace llvm;
MCAsmParser &Parser;
MipsAssemblerOptions Options;
-
#define GET_ASSEMBLER_HEADER
#include "MipsGenAsmMatcher.inc"
MipsAsmParser::OperandMatchResultTy
parseCCRRegs(SmallVectorImpl<MCParsedAsmOperand*> &Operands);
+ bool searchSymbolAlias(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
+ unsigned RegisterClass);
+
bool ParseOperand(SmallVectorImpl<MCParsedAsmOperand*> &,
StringRef Mnemonic);
SmallVectorImpl<MCInst> &Instructions);
void expandLoadAddressReg(MCInst &Inst, SMLoc IDLoc,
SmallVectorImpl<MCInst> &Instructions);
+ void expandMemInst(MCInst &Inst, SMLoc IDLoc,
+ SmallVectorImpl<MCInst> &Instructions,
+ bool isLoad,bool isImmOpnd);
bool reportParseError(StringRef ErrorMsg);
- bool parseMemOffset(const MCExpr *&Res);
+ bool parseMemOffset(const MCExpr *&Res, bool isParenExpr);
bool parseRelocOperand(const MCExpr *&Res);
+ const MCExpr* evaluateRelocExpr(const MCExpr *Expr, StringRef RelocStr);
+
+ bool isEvaluated(const MCExpr *Expr);
bool parseDirectiveSet();
bool parseSetAtDirective();
bool parseSetReorderDirective();
bool parseSetNoReorderDirective();
+ bool parseSetAssignment();
+
bool parseDirectiveWord(unsigned Size, SMLoc L);
MCSymbolRefExpr::VariantKind getVariantKind(StringRef Symbol);
bool requestsDoubleOperand(StringRef Mnemonic);
- unsigned getReg(int RC,int RegNo);
+ unsigned getReg(int RC, int RegNo);
int getATReg();
+
+ bool processInstruction(MCInst &Inst, SMLoc IDLoc,
+ SmallVectorImpl<MCInst> &Instructions);
public:
MipsAsmParser(MCSubtargetInfo &sti, MCAsmParser &parser)
: MCTargetAsmParser(), STI(sti), Parser(parser) {
MipsOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {}
+ struct Token {
+ const char *Data;
+ unsigned Length;
+ };
+
+ struct RegOp {
+ unsigned RegNum;
+ RegisterKind Kind;
+ };
+
+ struct ImmOp {
+ const MCExpr *Val;
+ };
+
+ struct MemOp {
+ unsigned Base;
+ const MCExpr *Off;
+ };
+
union {
- struct {
- const char *Data;
- unsigned Length;
- } Tok;
-
- struct {
- unsigned RegNum;
- RegisterKind Kind;
- } Reg;
-
- struct {
- const MCExpr *Val;
- } Imm;
-
- struct {
- unsigned Base;
- const MCExpr *Off;
- } Mem;
+ struct Token Tok;
+ struct RegOp Reg;
+ struct ImmOp Imm;
+ struct MemOp Mem;
};
SMLoc StartLoc, EndLoc;
void addImmOperands(MCInst &Inst, unsigned N) const {
assert(N == 1 && "Invalid number of operands!");
const MCExpr *Expr = getImm();
- addExpr(Inst,Expr);
+ addExpr(Inst, Expr);
}
void addMemOperands(MCInst &Inst, unsigned N) const {
Inst.addOperand(MCOperand::CreateReg(getMemBase()));
const MCExpr *Expr = getMemOff();
- addExpr(Inst,Expr);
+ addExpr(Inst, Expr);
}
bool isReg() const { return Kind == k_Register; }
}
/// getStartLoc - Get the location of the first token of this operand.
- SMLoc getStartLoc() const { return StartLoc; }
+ SMLoc getStartLoc() const {
+ return StartLoc;
+ }
/// getEndLoc - Get the location of the last token of this operand.
- SMLoc getEndLoc() const { return EndLoc; }
+ SMLoc getEndLoc() const {
+ return EndLoc;
+ }
virtual void print(raw_ostream &OS) const {
llvm_unreachable("unimplemented!");
}
-};
+}; // class MipsOperand
+} // namespace
+
+namespace llvm {
+extern const MCInstrDesc MipsInsts[];
+}
+static const MCInstrDesc &getInstDesc(unsigned Opcode) {
+ return MipsInsts[Opcode];
+}
+
+bool MipsAsmParser::processInstruction(MCInst &Inst, SMLoc IDLoc,
+ SmallVectorImpl<MCInst> &Instructions) {
+ const MCInstrDesc &MCID = getInstDesc(Inst.getOpcode());
+ Inst.setLoc(IDLoc);
+ if (MCID.hasDelaySlot() && Options.isReorder()) {
+ // If this instruction has a delay slot and .set reorder is active,
+ // emit a NOP after it.
+ Instructions.push_back(Inst);
+ MCInst NopInst;
+ NopInst.setOpcode(Mips::SLL);
+ NopInst.addOperand(MCOperand::CreateReg(Mips::ZERO));
+ NopInst.addOperand(MCOperand::CreateReg(Mips::ZERO));
+ NopInst.addOperand(MCOperand::CreateImm(0));
+ Instructions.push_back(NopInst);
+ return false;
+ }
+
+ if (MCID.mayLoad() || MCID.mayStore()) {
+ // Check the offset of memory operand, if it is a symbol
+ // reference or immediate we may have to expand instructions.
+ for (unsigned i = 0; i < MCID.getNumOperands(); i++) {
+ const MCOperandInfo &OpInfo = MCID.OpInfo[i];
+ if ((OpInfo.OperandType == MCOI::OPERAND_MEMORY)
+ || (OpInfo.OperandType == MCOI::OPERAND_UNKNOWN)) {
+ MCOperand &Op = Inst.getOperand(i);
+ if (Op.isImm()) {
+ int MemOffset = Op.getImm();
+ if (MemOffset < -32768 || MemOffset > 32767) {
+ // Offset can't exceed 16bit value.
+ expandMemInst(Inst, IDLoc, Instructions, MCID.mayLoad(), true);
+ return false;
+ }
+ } else if (Op.isExpr()) {
+ const MCExpr *Expr = Op.getExpr();
+ if (Expr->getKind() == MCExpr::SymbolRef) {
+ const MCSymbolRefExpr *SR =
+ static_cast<const MCSymbolRefExpr*>(Expr);
+ if (SR->getKind() == MCSymbolRefExpr::VK_None) {
+ // Expand symbol.
+ expandMemInst(Inst, IDLoc, Instructions, MCID.mayLoad(), false);
+ return false;
+ }
+ } else if (!isEvaluated(Expr)) {
+ expandMemInst(Inst, IDLoc, Instructions, MCID.mayLoad(), false);
+ return false;
+ }
+ }
+ }
+ } // for
+ } // if load/store
+
+ if (needsExpansion(Inst))
+ expandInstruction(Inst, IDLoc, Instructions);
+ else
+ Instructions.push_back(Inst);
+
+ return false;
}
bool MipsAsmParser::needsExpansion(MCInst &Inst) {
- switch(Inst.getOpcode()) {
- case Mips::LoadImm32Reg:
- case Mips::LoadAddr32Imm:
- case Mips::LoadAddr32Reg:
- return true;
- default:
- return false;
+ switch (Inst.getOpcode()) {
+ case Mips::LoadImm32Reg:
+ case Mips::LoadAddr32Imm:
+ case Mips::LoadAddr32Reg:
+ return true;
+ default:
+ return false;
}
}
void MipsAsmParser::expandInstruction(MCInst &Inst, SMLoc IDLoc,
- SmallVectorImpl<MCInst> &Instructions){
- switch(Inst.getOpcode()) {
- case Mips::LoadImm32Reg:
- return expandLoadImm(Inst, IDLoc, Instructions);
- case Mips::LoadAddr32Imm:
- return expandLoadAddressImm(Inst,IDLoc,Instructions);
- case Mips::LoadAddr32Reg:
- return expandLoadAddressReg(Inst,IDLoc,Instructions);
- }
+ SmallVectorImpl<MCInst> &Instructions) {
+ switch (Inst.getOpcode()) {
+ case Mips::LoadImm32Reg:
+ return expandLoadImm(Inst, IDLoc, Instructions);
+ case Mips::LoadAddr32Imm:
+ return expandLoadAddressImm(Inst, IDLoc, Instructions);
+ case Mips::LoadAddr32Reg:
+ return expandLoadAddressReg(Inst, IDLoc, Instructions);
+ }
}
void MipsAsmParser::expandLoadImm(MCInst &Inst, SMLoc IDLoc,
- SmallVectorImpl<MCInst> &Instructions){
+ SmallVectorImpl<MCInst> &Instructions) {
MCInst tmpInst;
const MCOperand &ImmOp = Inst.getOperand(1);
assert(ImmOp.isImm() && "expected immediate operand kind");
int ImmValue = ImmOp.getImm();
tmpInst.setLoc(IDLoc);
- if ( 0 <= ImmValue && ImmValue <= 65535) {
- // for 0 <= j <= 65535.
+ if (0 <= ImmValue && ImmValue <= 65535) {
+ // For 0 <= j <= 65535.
// li d,j => ori d,$zero,j
tmpInst.setOpcode(Mips::ORi);
tmpInst.addOperand(MCOperand::CreateReg(RegOp.getReg()));
- tmpInst.addOperand(
- MCOperand::CreateReg(Mips::ZERO));
+ tmpInst.addOperand(MCOperand::CreateReg(Mips::ZERO));
tmpInst.addOperand(MCOperand::CreateImm(ImmValue));
Instructions.push_back(tmpInst);
- } else if ( ImmValue < 0 && ImmValue >= -32768) {
- // for -32768 <= j < 0.
+ } else if (ImmValue < 0 && ImmValue >= -32768) {
+ // For -32768 <= j < 0.
// li d,j => addiu d,$zero,j
tmpInst.setOpcode(Mips::ADDiu);
tmpInst.addOperand(MCOperand::CreateReg(RegOp.getReg()));
- tmpInst.addOperand(
- MCOperand::CreateReg(Mips::ZERO));
+ tmpInst.addOperand(MCOperand::CreateReg(Mips::ZERO));
tmpInst.addOperand(MCOperand::CreateImm(ImmValue));
Instructions.push_back(tmpInst);
} else {
- // for any other value of j that is representable as a 32-bit integer.
+ // For any other value of j that is representable as a 32-bit integer.
// li d,j => lui d,hi16(j)
// ori d,d,lo16(j)
tmpInst.setOpcode(Mips::LUi);
}
void MipsAsmParser::expandLoadAddressReg(MCInst &Inst, SMLoc IDLoc,
- SmallVectorImpl<MCInst> &Instructions){
+ SmallVectorImpl<MCInst> &Instructions) {
MCInst tmpInst;
const MCOperand &ImmOp = Inst.getOperand(2);
assert(ImmOp.isImm() && "expected immediate operand kind");
const MCOperand &DstRegOp = Inst.getOperand(0);
assert(DstRegOp.isReg() && "expected register operand kind");
int ImmValue = ImmOp.getImm();
- if ( -32768 <= ImmValue && ImmValue <= 65535) {
- //for -32768 <= j <= 65535.
- //la d,j(s) => addiu d,s,j
+ if (-32768 <= ImmValue && ImmValue <= 65535) {
+ // For -32768 <= j <= 65535.
+ // la d,j(s) => addiu d,s,j
tmpInst.setOpcode(Mips::ADDiu);
tmpInst.addOperand(MCOperand::CreateReg(DstRegOp.getReg()));
tmpInst.addOperand(MCOperand::CreateReg(SrcRegOp.getReg()));
tmpInst.addOperand(MCOperand::CreateImm(ImmValue));
Instructions.push_back(tmpInst);
} else {
- //for any other value of j that is representable as a 32-bit integer.
- //la d,j(s) => lui d,hi16(j)
- // ori d,d,lo16(j)
- // addu d,d,s
+ // For any other value of j that is representable as a 32-bit integer.
+ // la d,j(s) => lui d,hi16(j)
+ // ori d,d,lo16(j)
+ // addu d,d,s
tmpInst.setOpcode(Mips::LUi);
tmpInst.addOperand(MCOperand::CreateReg(DstRegOp.getReg()));
tmpInst.addOperand(MCOperand::CreateImm((ImmValue & 0xffff0000) >> 16));
}
void MipsAsmParser::expandLoadAddressImm(MCInst &Inst, SMLoc IDLoc,
- SmallVectorImpl<MCInst> &Instructions){
+ SmallVectorImpl<MCInst> &Instructions) {
MCInst tmpInst;
const MCOperand &ImmOp = Inst.getOperand(1);
assert(ImmOp.isImm() && "expected immediate operand kind");
const MCOperand &RegOp = Inst.getOperand(0);
assert(RegOp.isReg() && "expected register operand kind");
int ImmValue = ImmOp.getImm();
- if ( -32768 <= ImmValue && ImmValue <= 65535) {
- //for -32768 <= j <= 65535.
- //la d,j => addiu d,$zero,j
+ if (-32768 <= ImmValue && ImmValue <= 65535) {
+ // For -32768 <= j <= 65535.
+ // la d,j => addiu d,$zero,j
tmpInst.setOpcode(Mips::ADDiu);
tmpInst.addOperand(MCOperand::CreateReg(RegOp.getReg()));
- tmpInst.addOperand(
- MCOperand::CreateReg(Mips::ZERO));
+ tmpInst.addOperand(MCOperand::CreateReg(Mips::ZERO));
tmpInst.addOperand(MCOperand::CreateImm(ImmValue));
Instructions.push_back(tmpInst);
} else {
- //for any other value of j that is representable as a 32-bit integer.
- //la d,j => lui d,hi16(j)
- // ori d,d,lo16(j)
+ // For any other value of j that is representable as a 32-bit integer.
+ // la d,j => lui d,hi16(j)
+ // ori d,d,lo16(j)
tmpInst.setOpcode(Mips::LUi);
tmpInst.addOperand(MCOperand::CreateReg(RegOp.getReg()));
tmpInst.addOperand(MCOperand::CreateImm((ImmValue & 0xffff0000) >> 16));
}
}
+void MipsAsmParser::expandMemInst(MCInst &Inst, SMLoc IDLoc,
+ SmallVectorImpl<MCInst> &Instructions, bool isLoad, bool isImmOpnd) {
+ const MCSymbolRefExpr *SR;
+ MCInst TempInst;
+ unsigned ImmOffset, HiOffset, LoOffset;
+ const MCExpr *ExprOffset;
+ unsigned TmpRegNum;
+ unsigned AtRegNum = getReg((isMips64()) ? Mips::CPU64RegsRegClassID
+ : Mips::CPURegsRegClassID, getATReg());
+ // 1st operand is either the source or destination register.
+ assert(Inst.getOperand(0).isReg() && "expected register operand kind");
+ unsigned RegOpNum = Inst.getOperand(0).getReg();
+ // 2nd operand is the base register.
+ assert(Inst.getOperand(1).isReg() && "expected register operand kind");
+ unsigned BaseRegNum = Inst.getOperand(1).getReg();
+ // 3rd operand is either an immediate or expression.
+ if (isImmOpnd) {
+ assert(Inst.getOperand(2).isImm() && "expected immediate operand kind");
+ ImmOffset = Inst.getOperand(2).getImm();
+ LoOffset = ImmOffset & 0x0000ffff;
+ HiOffset = (ImmOffset & 0xffff0000) >> 16;
+ // If msb of LoOffset is 1(negative number) we must increment HiOffset.
+ if (LoOffset & 0x8000)
+ HiOffset++;
+ } else
+ ExprOffset = Inst.getOperand(2).getExpr();
+ // All instructions will have the same location.
+ TempInst.setLoc(IDLoc);
+ // 1st instruction in expansion is LUi. For load instruction we can use
+ // the dst register as a temporary if base and dst are different,
+ // but for stores we must use $at.
+ TmpRegNum = (isLoad && (BaseRegNum != RegOpNum)) ? RegOpNum : AtRegNum;
+ TempInst.setOpcode(Mips::LUi);
+ TempInst.addOperand(MCOperand::CreateReg(TmpRegNum));
+ if (isImmOpnd)
+ TempInst.addOperand(MCOperand::CreateImm(HiOffset));
+ else {
+ if (ExprOffset->getKind() == MCExpr::SymbolRef) {
+ SR = static_cast<const MCSymbolRefExpr*>(ExprOffset);
+ const MCSymbolRefExpr *HiExpr = MCSymbolRefExpr::Create(
+ SR->getSymbol().getName(), MCSymbolRefExpr::VK_Mips_ABS_HI,
+ getContext());
+ TempInst.addOperand(MCOperand::CreateExpr(HiExpr));
+ } else {
+ const MCExpr *HiExpr = evaluateRelocExpr(ExprOffset, "hi");
+ TempInst.addOperand(MCOperand::CreateExpr(HiExpr));
+ }
+ }
+ // Add the instruction to the list.
+ Instructions.push_back(TempInst);
+ // Prepare TempInst for next instruction.
+ TempInst.clear();
+ // Add temp register to base.
+ TempInst.setOpcode(Mips::ADDu);
+ TempInst.addOperand(MCOperand::CreateReg(TmpRegNum));
+ TempInst.addOperand(MCOperand::CreateReg(TmpRegNum));
+ TempInst.addOperand(MCOperand::CreateReg(BaseRegNum));
+ Instructions.push_back(TempInst);
+ TempInst.clear();
+ // And finaly, create original instruction with low part
+ // of offset and new base.
+ TempInst.setOpcode(Inst.getOpcode());
+ TempInst.addOperand(MCOperand::CreateReg(RegOpNum));
+ TempInst.addOperand(MCOperand::CreateReg(TmpRegNum));
+ if (isImmOpnd)
+ TempInst.addOperand(MCOperand::CreateImm(LoOffset));
+ else {
+ if (ExprOffset->getKind() == MCExpr::SymbolRef) {
+ const MCSymbolRefExpr *LoExpr = MCSymbolRefExpr::Create(
+ SR->getSymbol().getName(), MCSymbolRefExpr::VK_Mips_ABS_LO,
+ getContext());
+ TempInst.addOperand(MCOperand::CreateExpr(LoExpr));
+ } else {
+ const MCExpr *LoExpr = evaluateRelocExpr(ExprOffset, "lo");
+ TempInst.addOperand(MCOperand::CreateExpr(LoExpr));
+ }
+ }
+ Instructions.push_back(TempInst);
+ TempInst.clear();
+}
+
bool MipsAsmParser::
MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
SmallVectorImpl<MCParsedAsmOperand*> &Operands,
MCStreamer &Out, unsigned &ErrorInfo,
bool MatchingInlineAsm) {
MCInst Inst;
+ SmallVector<MCInst, 8> Instructions;
unsigned MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo,
MatchingInlineAsm);
switch (MatchResult) {
- default: break;
+ default:
+ break;
case Match_Success: {
- if (needsExpansion(Inst)) {
- SmallVector<MCInst, 4> Instructions;
- expandInstruction(Inst, IDLoc, Instructions);
- for(unsigned i =0; i < Instructions.size(); i++){
- Out.EmitInstruction(Instructions[i]);
- }
- } else {
- Inst.setLoc(IDLoc);
- Out.EmitInstruction(Inst);
- }
+ if (processInstruction(Inst, IDLoc, Instructions))
+ return true;
+ for (unsigned i = 0; i < Instructions.size(); i++)
+ Out.EmitInstruction(Instructions[i]);
return false;
}
case Match_MissingFeature:
if (ErrorInfo >= Operands.size())
return Error(IDLoc, "too few operands for instruction");
- ErrorLoc = ((MipsOperand*)Operands[ErrorInfo])->getStartLoc();
- if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
+ ErrorLoc = ((MipsOperand*) Operands[ErrorInfo])->getStartLoc();
+ if (ErrorLoc == SMLoc())
+ ErrorLoc = IDLoc;
}
return Error(ErrorLoc, "invalid operand for instruction");
.Case("t9", 25)
.Default(-1);
- // Although SGI documentation just cut out t0-t3 for n32/n64,
+ // Although SGI documentation just cuts out t0-t3 for n32/n64,
// GNU pushes the values of t0-t3 to override the o32/o64 values for t4-t7
// We are supporting both cases, so for t0-t3 we'll just push them to t4-t7.
- if (isMips64() && 8 <= CC && CC <= 11)
+ if (isMips64() && 8 <= CC && CC <= 11)
CC += 4;
if (CC == -1 && isMips64())
return CC;
}
+
int MipsAsmParser::matchRegisterName(StringRef Name, bool is64BitReg) {
+ if (Name.equals("fcc0"))
+ return Mips::FCC0;
+
int CC;
CC = matchCPURegisterName(Name);
if (CC != -1)
- return matchRegisterByNumber(CC,is64BitReg?Mips::CPU64RegsRegClassID:
- Mips::CPURegsRegClassID);
+ return matchRegisterByNumber(CC, is64BitReg ? Mips::CPU64RegsRegClassID
+ : Mips::CPURegsRegClassID);
if (Name[0] == 'f') {
StringRef NumString = Name.substr(1);
unsigned IntVal;
- if( NumString.getAsInteger(10, IntVal))
- return -1; // not integer
+ if (NumString.getAsInteger(10, IntVal))
+ return -1; // This is not an integer.
if (IntVal > 31)
return -1;
if (Format == FP_FORMAT_S || Format == FP_FORMAT_W)
return getReg(Mips::FGR32RegClassID, IntVal);
if (Format == FP_FORMAT_D) {
- if(isFP64()) {
+ if (isFP64()) {
return getReg(Mips::FGR64RegClassID, IntVal);
}
- // only even numbers available as register pairs
- if (( IntVal > 31) || (IntVal%2 != 0))
+ // Only even numbers available as register pairs.
+ if ((IntVal > 31) || (IntVal % 2 != 0))
return -1;
- return getReg(Mips::AFGR64RegClassID, IntVal/2);
+ return getReg(Mips::AFGR64RegClassID, IntVal / 2);
}
}
return -1;
}
+
void MipsAsmParser::setDefaultFpFormat() {
if (isMips64() || isFP64())
return IsDouble;
}
+
void MipsAsmParser::setFpFormat(StringRef Format) {
FpFormat = StringSwitch<FpFormatTy>(Format.lower())
return Options.getATRegNum();
}
-unsigned MipsAsmParser::getReg(int RC,int RegNo) {
+unsigned MipsAsmParser::getReg(int RC, int RegNo) {
return *(getContext().getRegisterInfo().getRegClass(RC).begin() + RegNo);
}
RegNum = matchRegisterName(lowerCase, is64BitReg);
} else if (Tok.is(AsmToken::Integer))
RegNum = matchRegisterByNumber(static_cast<unsigned>(Tok.getIntVal()),
- is64BitReg ? Mips::CPU64RegsRegClassID
- : Mips::CPURegsRegClassID);
+ is64BitReg ? Mips::CPU64RegsRegClassID : Mips::CPURegsRegClassID);
return RegNum;
}
-bool MipsAsmParser::
- tryParseRegisterOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
- bool is64BitReg){
+bool MipsAsmParser::tryParseRegisterOperand(
+ SmallVectorImpl<MCParsedAsmOperand*> &Operands, bool is64BitReg) {
SMLoc S = Parser.getTok().getLoc();
int RegNo = -1;
return true;
Operands.push_back(MipsOperand::CreateReg(RegNo, S,
- Parser.getTok().getLoc()));
+ Parser.getTok().getLoc()));
Parser.Lex(); // Eat register token.
return false;
}
Error(Parser.getTok().getLoc(), "unexpected token in operand");
return true;
case AsmToken::Dollar: {
- // parse register
+ // Parse the register.
SMLoc S = Parser.getTok().getLoc();
Parser.Lex(); // Eat dollar token.
- // parse register operand
+ // Parse the register operand.
if (!tryParseRegisterOperand(Operands, isMips64())) {
if (getLexer().is(AsmToken::LParen)) {
- // check if it is indexed addressing operand
+ // Check if it is indexed addressing operand.
Operands.push_back(MipsOperand::CreateToken("(", S));
- Parser.Lex(); // eat parenthesis
+ Parser.Lex(); // Eat the parenthesis.
if (getLexer().isNot(AsmToken::Dollar))
return true;
- Parser.Lex(); // eat dollar
+ Parser.Lex(); // Eat the dollar
if (tryParseRegisterOperand(Operands, isMips64()))
return true;
}
return false;
}
- // maybe it is a symbol reference
+ // Maybe it is a symbol reference.
StringRef Identifier;
if (Parser.parseIdentifier(Identifier))
return true;
MCSymbol *Sym = getContext().GetOrCreateSymbol("$" + Identifier);
- // Otherwise create a symbol ref.
+ // Otherwise create a symbol reference.
const MCExpr *Res = MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_None,
getContext());
return false;
}
case AsmToken::Identifier:
+ // Look for the existing symbol, we should check if
+ // we need to assigne the propper RegisterKind.
+ if (searchSymbolAlias(Operands, MipsOperand::Kind_None))
+ return false;
+ // Else drop to expression parsing.
case AsmToken::LParen:
case AsmToken::Minus:
case AsmToken::Plus:
case AsmToken::Integer:
case AsmToken::String: {
- // quoted label names
+ // Quoted label names.
const MCExpr *IdVal;
SMLoc S = Parser.getTok().getLoc();
if (getParser().parseExpression(IdVal))
return false;
}
case AsmToken::Percent: {
- // it is a symbol reference or constant expression
+ // It is a symbol reference or constant expression.
const MCExpr *IdVal;
- SMLoc S = Parser.getTok().getLoc(); // start location of the operand
+ SMLoc S = Parser.getTok().getLoc(); // Start location of the operand.
if (parseRelocOperand(IdVal))
return true;
return true;
}
-bool MipsAsmParser::parseRelocOperand(const MCExpr *&Res) {
+const MCExpr* MipsAsmParser::evaluateRelocExpr(const MCExpr *Expr,
+ StringRef RelocStr) {
+ const MCExpr *Res;
+ // Check the type of the expression.
+ if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Expr)) {
+ // It's a constant, evaluate lo or hi value.
+ if (RelocStr == "lo") {
+ short Val = MCE->getValue();
+ Res = MCConstantExpr::Create(Val, getContext());
+ } else if (RelocStr == "hi") {
+ int Val = MCE->getValue();
+ int LoSign = Val & 0x8000;
+ Val = (Val & 0xffff0000) >> 16;
+ // Lower part is treated as a signed int, so if it is negative
+ // we must add 1 to the hi part to compensate.
+ if (LoSign)
+ Val++;
+ Res = MCConstantExpr::Create(Val, getContext());
+ } else {
+ llvm_unreachable("Invalid RelocStr value");
+ }
+ return Res;
+ }
+
+ if (const MCSymbolRefExpr *MSRE = dyn_cast<MCSymbolRefExpr>(Expr)) {
+ // It's a symbol, create a symbolic expression from the symbol.
+ StringRef Symbol = MSRE->getSymbol().getName();
+ MCSymbolRefExpr::VariantKind VK = getVariantKind(RelocStr);
+ Res = MCSymbolRefExpr::Create(Symbol, VK, getContext());
+ return Res;
+ }
+
+ if (const MCBinaryExpr *BE = dyn_cast<MCBinaryExpr>(Expr)) {
+ const MCExpr *LExp = evaluateRelocExpr(BE->getLHS(), RelocStr);
+ const MCExpr *RExp = evaluateRelocExpr(BE->getRHS(), RelocStr);
+ Res = MCBinaryExpr::Create(BE->getOpcode(), LExp, RExp, getContext());
+ return Res;
+ }
+
+ if (const MCUnaryExpr *UN = dyn_cast<MCUnaryExpr>(Expr)) {
+ const MCExpr *UnExp = evaluateRelocExpr(UN->getSubExpr(), RelocStr);
+ Res = MCUnaryExpr::Create(UN->getOpcode(), UnExp, getContext());
+ return Res;
+ }
+ // Just return the original expression.
+ return Expr;
+}
+
+bool MipsAsmParser::isEvaluated(const MCExpr *Expr) {
+
+ switch (Expr->getKind()) {
+ case MCExpr::Constant:
+ return true;
+ case MCExpr::SymbolRef:
+ return (cast<MCSymbolRefExpr>(Expr)->getKind() != MCSymbolRefExpr::VK_None);
+ case MCExpr::Binary:
+ if (const MCBinaryExpr *BE = dyn_cast<MCBinaryExpr>(Expr)) {
+ if (!isEvaluated(BE->getLHS()))
+ return false;
+ return isEvaluated(BE->getRHS());
+ }
+ case MCExpr::Unary:
+ return isEvaluated(cast<MCUnaryExpr>(Expr)->getSubExpr());
+ default:
+ return false;
+ }
+ return false;
+}
- Parser.Lex(); // eat % token
- const AsmToken &Tok = Parser.getTok(); // get next token, operation
+bool MipsAsmParser::parseRelocOperand(const MCExpr *&Res) {
+ Parser.Lex(); // Eat the % token.
+ const AsmToken &Tok = Parser.getTok(); // Get next token, operation.
if (Tok.isNot(AsmToken::Identifier))
return true;
std::string Str = Tok.getIdentifier().str();
- Parser.Lex(); // eat identifier
- // now make expression from the rest of the operand
+ Parser.Lex(); // Eat the identifier.
+ // Now make an expression from the rest of the operand.
const MCExpr *IdVal;
SMLoc EndLoc;
if (getLexer().getKind() == AsmToken::LParen) {
while (1) {
- Parser.Lex(); // eat '(' token
+ Parser.Lex(); // Eat the '(' token.
if (getLexer().getKind() == AsmToken::Percent) {
- Parser.Lex(); // eat % token
+ Parser.Lex(); // Eat the % token.
const AsmToken &nextTok = Parser.getTok();
if (nextTok.isNot(AsmToken::Identifier))
return true;
Str += "(%";
Str += nextTok.getIdentifier();
- Parser.Lex(); // eat identifier
+ Parser.Lex(); // Eat the identifier.
if (getLexer().getKind() != AsmToken::LParen)
return true;
} else
break;
}
- if (getParser().parseParenExpression(IdVal,EndLoc))
+ if (getParser().parseParenExpression(IdVal, EndLoc))
return true;
while (getLexer().getKind() == AsmToken::RParen)
- Parser.Lex(); // eat ')' token
+ Parser.Lex(); // Eat the ')' token.
} else
- return true; // parenthesis must follow reloc operand
-
- // Check the type of the expression
- if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(IdVal)) {
- // it's a constant, evaluate lo or hi value
- int Val = MCE->getValue();
- if (Str == "lo") {
- Val = Val & 0xffff;
- } else if (Str == "hi") {
- int LoSign = Val & 0x8000;
- Val = (Val & 0xffff0000) >> 16;
- //lower part is treated as signed int, so if it is negative
- //we must add 1 to hi part to compensate
- if (LoSign)
- Val++;
- }
- Res = MCConstantExpr::Create(Val, getContext());
- return false;
- }
+ return true; // Parenthesis must follow the relocation operand.
- if (const MCSymbolRefExpr *MSRE = dyn_cast<MCSymbolRefExpr>(IdVal)) {
- // it's a symbol, create symbolic expression from symbol
- StringRef Symbol = MSRE->getSymbol().getName();
- MCSymbolRefExpr::VariantKind VK = getVariantKind(Str);
- Res = MCSymbolRefExpr::Create(Symbol,VK,getContext());
- return false;
- }
- return true;
+ Res = evaluateRelocExpr(IdVal, Str);
+ return false;
}
bool MipsAsmParser::ParseRegister(unsigned &RegNo, SMLoc &StartLoc,
SMLoc &EndLoc) {
-
StartLoc = Parser.getTok().getLoc();
RegNo = tryParseRegister(isMips64());
EndLoc = Parser.getTok().getLoc();
- return (RegNo == (unsigned)-1);
+ return (RegNo == (unsigned) -1);
}
-bool MipsAsmParser::parseMemOffset(const MCExpr *&Res) {
-
+bool MipsAsmParser::parseMemOffset(const MCExpr *&Res, bool isParenExpr) {
SMLoc S;
+ bool Result = true;
- switch(getLexer().getKind()) {
+ while (getLexer().getKind() == AsmToken::LParen)
+ Parser.Lex();
+
+ switch (getLexer().getKind()) {
default:
return true;
+ case AsmToken::Identifier:
+ case AsmToken::LParen:
case AsmToken::Integer:
case AsmToken::Minus:
case AsmToken::Plus:
- return (getParser().parseExpression(Res));
+ if (isParenExpr)
+ Result = getParser().parseParenExpression(Res, S);
+ else
+ Result = (getParser().parseExpression(Res));
+ while (getLexer().getKind() == AsmToken::RParen)
+ Parser.Lex();
+ break;
case AsmToken::Percent:
- return parseRelocOperand(Res);
- case AsmToken::LParen:
- return false; // it's probably assuming 0
+ Result = parseRelocOperand(Res);
}
- return true;
+ return Result;
}
MipsAsmParser::OperandMatchResultTy MipsAsmParser::parseMemOperand(
- SmallVectorImpl<MCParsedAsmOperand*>&Operands) {
+ SmallVectorImpl<MCParsedAsmOperand*>&Operands) {
const MCExpr *IdVal = 0;
SMLoc S;
- // first operand is the offset
+ bool isParenExpr = false;
+ // First operand is the offset.
S = Parser.getTok().getLoc();
- if (parseMemOffset(IdVal))
- return MatchOperand_ParseFail;
+ if (getLexer().getKind() == AsmToken::LParen) {
+ Parser.Lex();
+ isParenExpr = true;
+ }
- const AsmToken &Tok = Parser.getTok(); // get next token
- if (Tok.isNot(AsmToken::LParen)) {
- MipsOperand *Mnemonic = static_cast<MipsOperand*>(Operands[0]);
- if (Mnemonic->getToken() == "la") {
- SMLoc E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() -1);
- Operands.push_back(MipsOperand::CreateImm(IdVal, S, E));
- return MatchOperand_Success;
+ if (getLexer().getKind() != AsmToken::Dollar) {
+ if (parseMemOffset(IdVal, isParenExpr))
+ return MatchOperand_ParseFail;
+
+ const AsmToken &Tok = Parser.getTok(); // Get the next token.
+ if (Tok.isNot(AsmToken::LParen)) {
+ MipsOperand *Mnemonic = static_cast<MipsOperand*>(Operands[0]);
+ if (Mnemonic->getToken() == "la") {
+ SMLoc E = SMLoc::getFromPointer(
+ Parser.getTok().getLoc().getPointer() - 1);
+ Operands.push_back(MipsOperand::CreateImm(IdVal, S, E));
+ return MatchOperand_Success;
+ }
+ if (Tok.is(AsmToken::EndOfStatement)) {
+ SMLoc E = SMLoc::getFromPointer(
+ Parser.getTok().getLoc().getPointer() - 1);
+
+ // Zero register assumed, add a memory operand with ZERO as its base.
+ Operands.push_back(MipsOperand::CreateMem(isMips64() ? Mips::ZERO_64
+ : Mips::ZERO,
+ IdVal, S, E));
+ return MatchOperand_Success;
+ }
+ Error(Parser.getTok().getLoc(), "'(' expected");
+ return MatchOperand_ParseFail;
}
- Error(Parser.getTok().getLoc(), "'(' expected");
- return MatchOperand_ParseFail;
- }
- Parser.Lex(); // Eat '(' token.
+ Parser.Lex(); // Eat the '(' token.
+ }
- const AsmToken &Tok1 = Parser.getTok(); // get next token
+ const AsmToken &Tok1 = Parser.getTok(); // Get next token
if (Tok1.is(AsmToken::Dollar)) {
- Parser.Lex(); // Eat '$' token.
+ Parser.Lex(); // Eat the '$' token.
if (tryParseRegisterOperand(Operands, isMips64())) {
Error(Parser.getTok().getLoc(), "unexpected token in operand");
return MatchOperand_ParseFail;
return MatchOperand_ParseFail;
}
- const AsmToken &Tok2 = Parser.getTok(); // get next token
+ const AsmToken &Tok2 = Parser.getTok(); // Get next token.
if (Tok2.isNot(AsmToken::RParen)) {
Error(Parser.getTok().getLoc(), "')' expected");
return MatchOperand_ParseFail;
SMLoc E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
- Parser.Lex(); // Eat ')' token.
+ Parser.Lex(); // Eat the ')' token.
if (IdVal == 0)
IdVal = MCConstantExpr::Create(0, getContext());
- // now replace register operand with the mem operand
+ // Replace the register operand with the memory operand.
MipsOperand* op = static_cast<MipsOperand*>(Operands.back());
int RegNo = op->getReg();
- // remove register from operands
+ // Remove the register from the operands.
Operands.pop_back();
- // and add memory operand
+ // Add the memory operand.
+ if (const MCBinaryExpr *BE = dyn_cast<MCBinaryExpr>(IdVal)) {
+ int64_t Imm;
+ if (IdVal->EvaluateAsAbsolute(Imm))
+ IdVal = MCConstantExpr::Create(Imm, getContext());
+ else if (BE->getLHS()->getKind() != MCExpr::SymbolRef)
+ IdVal = MCBinaryExpr::Create(BE->getOpcode(), BE->getRHS(), BE->getLHS(),
+ getContext());
+ }
+
Operands.push_back(MipsOperand::CreateMem(RegNo, IdVal, S, E));
delete op;
return MatchOperand_Success;
if (!isMips64())
return MatchOperand_NoMatch;
- // if the first token is not '$' we have an error
+ if (getLexer().getKind() == AsmToken::Identifier) {
+ if (searchSymbolAlias(Operands, MipsOperand::Kind_CPU64Regs))
+ return MatchOperand_Success;
+ return MatchOperand_NoMatch;
+ }
+ // If the first token is not '$', we have an error.
if (Parser.getTok().isNot(AsmToken::Dollar))
return MatchOperand_NoMatch;
Parser.Lex(); // Eat $
- if(!tryParseRegisterOperand(Operands, true)) {
- // set the proper register kind
+ if (!tryParseRegisterOperand(Operands, true)) {
+ // Set the proper register kind.
MipsOperand* op = static_cast<MipsOperand*>(Operands.back());
op->setRegKind(MipsOperand::Kind_CPU64Regs);
return MatchOperand_Success;
return MatchOperand_NoMatch;
}
+bool MipsAsmParser::searchSymbolAlias(
+ SmallVectorImpl<MCParsedAsmOperand*> &Operands, unsigned RegisterKind) {
+
+ MCSymbol *Sym = getContext().LookupSymbol(Parser.getTok().getIdentifier());
+ if (Sym) {
+ SMLoc S = Parser.getTok().getLoc();
+ const MCExpr *Expr;
+ if (Sym->isVariable())
+ Expr = Sym->getVariableValue();
+ else
+ return false;
+ if (Expr->getKind() == MCExpr::SymbolRef) {
+ const MCSymbolRefExpr *Ref = static_cast<const MCSymbolRefExpr*>(Expr);
+ const StringRef DefSymbol = Ref->getSymbol().getName();
+ if (DefSymbol.startswith("$")) {
+ int RegNum = -1;
+ APInt IntVal(32, -1);
+ if (!DefSymbol.substr(1).getAsInteger(10, IntVal))
+ RegNum = matchRegisterByNumber(IntVal.getZExtValue(),
+ isMips64()
+ ? Mips::CPU64RegsRegClassID
+ : Mips::CPURegsRegClassID);
+ else
+ // Lookup for the register with corresponding name
+ RegNum = matchRegisterName(DefSymbol.substr(1), isMips64());
+ if (RegNum > -1) {
+ Parser.Lex();
+ MipsOperand *op = MipsOperand::CreateReg(RegNum, S,
+ Parser.getTok().getLoc());
+ op->setRegKind((MipsOperand::RegisterKind) RegisterKind);
+ Operands.push_back(op);
+ return true;
+ }
+ }
+ } else if (Expr->getKind() == MCExpr::Constant) {
+ Parser.Lex();
+ const MCConstantExpr *Const = static_cast<const MCConstantExpr*>(Expr);
+ MipsOperand *op = MipsOperand::CreateImm(Const, S,
+ Parser.getTok().getLoc());
+ Operands.push_back(op);
+ return true;
+ }
+ }
+ return false;
+}
+
MipsAsmParser::OperandMatchResultTy
MipsAsmParser::parseCPURegs(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
- // if the first token is not '$' we have an error
+ if (getLexer().getKind() == AsmToken::Identifier) {
+ if (searchSymbolAlias(Operands, MipsOperand::Kind_CPURegs))
+ return MatchOperand_Success;
+ return MatchOperand_NoMatch;
+ }
+ // If the first token is not '$' we have an error.
if (Parser.getTok().isNot(AsmToken::Dollar))
return MatchOperand_NoMatch;
Parser.Lex(); // Eat $
- if(!tryParseRegisterOperand(Operands, false)) {
- // set the propper register kind
+ if (!tryParseRegisterOperand(Operands, false)) {
+ // Set the proper register kind.
MipsOperand* op = static_cast<MipsOperand*>(Operands.back());
op->setRegKind(MipsOperand::Kind_CPURegs);
return MatchOperand_Success;
if (isMips64())
return MatchOperand_NoMatch;
- // if the first token is not '$' we have error
+ // If the first token is not '$' we have error.
if (Parser.getTok().isNot(AsmToken::Dollar))
return MatchOperand_NoMatch;
SMLoc S = Parser.getTok().getLoc();
- Parser.Lex(); // Eat $
+ Parser.Lex(); // Eat the '$'.
- const AsmToken &Tok = Parser.getTok(); // get next token
+ const AsmToken &Tok = Parser.getTok(); // Get the next token.
if (Tok.isNot(AsmToken::Integer))
return MatchOperand_NoMatch;
unsigned RegNum = Tok.getIntVal();
- // at the moment only hwreg29 is supported
+ // At the moment only hwreg29 is supported.
if (RegNum != 29)
return MatchOperand_ParseFail;
MipsOperand *op = MipsOperand::CreateReg(Mips::HWR29, S,
- Parser.getTok().getLoc());
+ Parser.getTok().getLoc());
op->setRegKind(MipsOperand::Kind_HWRegs);
Operands.push_back(op);
- Parser.Lex(); // Eat reg number
+ Parser.Lex(); // Eat the register number.
return MatchOperand_Success;
}
MipsAsmParser::OperandMatchResultTy
-MipsAsmParser::parseHW64Regs(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
+MipsAsmParser::parseHW64Regs(
+ SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
if (!isMips64())
return MatchOperand_NoMatch;
- //if the first token is not '$' we have error
+ // If the first token is not '$' we have an error.
if (Parser.getTok().isNot(AsmToken::Dollar))
return MatchOperand_NoMatch;
SMLoc S = Parser.getTok().getLoc();
Parser.Lex(); // Eat $
- const AsmToken &Tok = Parser.getTok(); // get next token
+ const AsmToken &Tok = Parser.getTok(); // Get the next token.
if (Tok.isNot(AsmToken::Integer))
return MatchOperand_NoMatch;
unsigned RegNum = Tok.getIntVal();
- // at the moment only hwreg29 is supported
+ // At the moment only hwreg29 is supported.
if (RegNum != 29)
return MatchOperand_ParseFail;
MipsOperand *op = MipsOperand::CreateReg(Mips::HWR29_64, S,
- Parser.getTok().getLoc());
+ Parser.getTok().getLoc());
op->setRegKind(MipsOperand::Kind_HW64Regs);
Operands.push_back(op);
- Parser.Lex(); // Eat reg number
+ Parser.Lex(); // Eat the register number.
return MatchOperand_Success;
}
MipsAsmParser::OperandMatchResultTy
MipsAsmParser::parseCCRRegs(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
unsigned RegNum;
- //if the first token is not '$' we have error
+ // If the first token is not '$' we have an error.
if (Parser.getTok().isNot(AsmToken::Dollar))
return MatchOperand_NoMatch;
SMLoc S = Parser.getTok().getLoc();
- Parser.Lex(); // Eat $
+ Parser.Lex(); // Eat the '$'
- const AsmToken &Tok = Parser.getTok(); // get next token
+ const AsmToken &Tok = Parser.getTok(); // Get next token.
if (Tok.is(AsmToken::Integer)) {
RegNum = Tok.getIntVal();
- // at the moment only fcc0 is supported
+ // At the moment only fcc0 is supported.
if (RegNum != 0)
return MatchOperand_ParseFail;
} else if (Tok.is(AsmToken::Identifier)) {
- // at the moment only fcc0 is supported
+ // At the moment only fcc0 is supported.
if (Tok.getIdentifier() != "fcc0")
return MatchOperand_ParseFail;
} else
return MatchOperand_NoMatch;
MipsOperand *op = MipsOperand::CreateReg(Mips::FCC0, S,
- Parser.getTok().getLoc());
+ Parser.getTok().getLoc());
op->setRegKind(MipsOperand::Kind_CCRRegs);
Operands.push_back(op);
- Parser.Lex(); // Eat reg number
+ Parser.Lex(); // Eat the register number.
return MatchOperand_Success;
}
static int ConvertCcString(StringRef CondString) {
int CC = StringSwitch<unsigned>(CondString)
- .Case(".f", 0)
- .Case(".un", 1)
- .Case(".eq", 2)
- .Case(".ueq", 3)
- .Case(".olt", 4)
- .Case(".ult", 5)
- .Case(".ole", 6)
- .Case(".ule", 7)
- .Case(".sf", 8)
- .Case(".ngle", 9)
- .Case(".seq", 10)
- .Case(".ngl", 11)
- .Case(".lt", 12)
- .Case(".nge", 13)
- .Case(".le", 14)
- .Case(".ngt", 15)
- .Default(-1);
+ .Case(".f", 0)
+ .Case(".un", 1)
+ .Case(".eq", 2)
+ .Case(".ueq", 3)
+ .Case(".olt", 4)
+ .Case(".ult", 5)
+ .Case(".ole", 6)
+ .Case(".ule", 7)
+ .Case(".sf", 8)
+ .Case(".ngle", 9)
+ .Case(".seq", 10)
+ .Case(".ngl", 11)
+ .Case(".lt", 12)
+ .Case(".nge", 13)
+ .Case(".le", 14)
+ .Case(".ngt", 15)
+ .Default(-1);
return CC;
}
bool MipsAsmParser::
parseMathOperation(StringRef Name, SMLoc NameLoc,
SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
- // split the format
+ // Split the format.
size_t Start = Name.find('.'), Next = Name.rfind('.');
StringRef Format1 = Name.slice(Start, Next);
- // and add the first format to the operands
+ // Add the first format to the operands.
Operands.push_back(MipsOperand::CreateToken(Format1, NameLoc));
- // now for the second format
+ // Now for the second format.
StringRef Format2 = Name.slice(Next, StringRef::npos);
Operands.push_back(MipsOperand::CreateToken(Format2, NameLoc));
- // set the format for the first register
+ // Set the format for the first register.
setFpFormat(Format1);
// Read the remaining operands.
SMLoc Loc = getLexer().getLoc();
Parser.eatToEndOfStatement();
return Error(Loc, "unexpected token in argument list");
-
}
- Parser.Lex(); // Eat the comma.
+ Parser.Lex(); // Eat the comma.
- //set the format for the first register
+ // Set the format for the first register
setFpFormat(Format2);
// Parse and remember the operand.
return Error(Loc, "unexpected token in argument list");
}
- Parser.Lex(); // Consume the EndOfStatement
+ Parser.Lex(); // Consume the EndOfStatement.
return false;
}
ParseInstruction(ParseInstructionInfo &Info, StringRef Name, SMLoc NameLoc,
SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
StringRef Mnemonic;
- // floating point instructions: should register be treated as double?
+ // Floating point instructions: Should the register be treated as a double?
if (requestsDoubleOperand(Name)) {
setFpFormat(FP_FORMAT_D);
- Operands.push_back(MipsOperand::CreateToken(Name, NameLoc));
- Mnemonic = Name;
- }
- else {
+ Operands.push_back(MipsOperand::CreateToken(Name, NameLoc));
+ Mnemonic = Name;
+ } else {
setDefaultFpFormat();
// Create the leading tokens for the mnemonic, split by '.' characters.
size_t Start = 0, Next = Name.find('.');
Operands.push_back(MipsOperand::CreateToken(Mnemonic, NameLoc));
if (Next != StringRef::npos) {
- // there is a format token in mnemonic
- // StringRef Rest = Name.slice(Next, StringRef::npos);
- size_t Dot = Name.find('.', Next+1);
+ // There is a format token in mnemonic.
+ size_t Dot = Name.find('.', Next + 1);
StringRef Format = Name.slice(Next, Dot);
- if (Dot == StringRef::npos) //only one '.' in a string, it's a format
+ if (Dot == StringRef::npos) // Only one '.' in a string, it's a format.
Operands.push_back(MipsOperand::CreateToken(Format, NameLoc));
else {
- if (Name.startswith("c.")){
- // floating point compare, add '.' and immediate represent for cc
+ if (Name.startswith("c.")) {
+ // Floating point compare, add '.' and immediate represent for cc.
Operands.push_back(MipsOperand::CreateToken(".", NameLoc));
int Cc = ConvertCcString(Format);
if (Cc == -1) {
return Error(NameLoc, "Invalid conditional code");
}
SMLoc E = SMLoc::getFromPointer(
- Parser.getTok().getLoc().getPointer() -1 );
- Operands.push_back(MipsOperand::CreateImm(
- MCConstantExpr::Create(Cc, getContext()), NameLoc, E));
+ Parser.getTok().getLoc().getPointer() - 1);
+ Operands.push_back(
+ MipsOperand::CreateImm(MCConstantExpr::Create(Cc, getContext()),
+ NameLoc, E));
} else {
// trunc, ceil, floor ...
return parseMathOperation(Name, NameLoc, Operands);
}
- // the rest is a format
+ // The rest is a format.
Format = Name.slice(Dot, StringRef::npos);
Operands.push_back(MipsOperand::CreateToken(Format, NameLoc));
}
return Error(Loc, "unexpected token in argument list");
}
- while (getLexer().is(AsmToken::Comma) ) {
- Parser.Lex(); // Eat the comma.
+ while (getLexer().is(AsmToken::Comma)) {
+ Parser.Lex(); // Eat the comma.
// Parse and remember the operand.
if (ParseOperand(Operands, Name)) {
return Error(Loc, "unexpected token in argument list");
}
- Parser.Lex(); // Consume the EndOfStatement
+ Parser.Lex(); // Consume the EndOfStatement.
return false;
}
bool MipsAsmParser::reportParseError(StringRef ErrorMsg) {
- SMLoc Loc = getLexer().getLoc();
- Parser.eatToEndOfStatement();
- return Error(Loc, ErrorMsg);
+ SMLoc Loc = getLexer().getLoc();
+ Parser.eatToEndOfStatement();
+ return Error(Loc, ErrorMsg);
}
bool MipsAsmParser::parseSetNoAtDirective() {
- // line should look like:
- // .set noat
- // set at reg to 0
+ // Line should look like: ".set noat".
+ // set at reg to 0.
Options.setATReg(0);
// eat noat
Parser.Lex();
- // if this is not the end of the statement, report error
+ // If this is not the end of the statement, report an error.
if (getLexer().isNot(AsmToken::EndOfStatement)) {
reportParseError("unexpected token in statement");
return false;
}
- Parser.Lex(); // Consume the EndOfStatement
+ Parser.Lex(); // Consume the EndOfStatement.
return false;
}
+
bool MipsAsmParser::parseSetAtDirective() {
- // line can be
- // .set at - defaults to $1
+ // Line can be .set at - defaults to $1
// or .set at=$reg
int AtRegNo;
getParser().Lex();
if (getLexer().is(AsmToken::EndOfStatement)) {
Options.setATReg(1);
- Parser.Lex(); // Consume the EndOfStatement
+ Parser.Lex(); // Consume the EndOfStatement.
return false;
} else if (getLexer().is(AsmToken::Equal)) {
- getParser().Lex(); //eat '='
+ getParser().Lex(); // Eat the '='.
if (getLexer().isNot(AsmToken::Dollar)) {
reportParseError("unexpected token in statement");
return false;
}
- Parser.Lex(); // eat '$'
+ Parser.Lex(); // Eat the '$'.
const AsmToken &Reg = Parser.getTok();
if (Reg.is(AsmToken::Identifier)) {
AtRegNo = matchCPURegisterName(Reg.getIdentifier());
return false;
}
- if ( AtRegNo < 1 || AtRegNo > 31) {
+ if (AtRegNo < 1 || AtRegNo > 31) {
reportParseError("unexpected token in statement");
return false;
}
reportParseError("unexpected token in statement");
return false;
}
- getParser().Lex(); //eat reg
+ getParser().Lex(); // Eat the register.
if (getLexer().isNot(AsmToken::EndOfStatement)) {
reportParseError("unexpected token in statement");
return false;
- }
- Parser.Lex(); // Consume the EndOfStatement
+ }
+ Parser.Lex(); // Consume the EndOfStatement.
return false;
} else {
reportParseError("unexpected token in statement");
bool MipsAsmParser::parseSetReorderDirective() {
Parser.Lex();
- // if this is not the end of the statement, report error
+ // If this is not the end of the statement, report an error.
if (getLexer().isNot(AsmToken::EndOfStatement)) {
reportParseError("unexpected token in statement");
return false;
}
Options.setReorder();
- Parser.Lex(); // Consume the EndOfStatement
+ Parser.Lex(); // Consume the EndOfStatement.
return false;
}
bool MipsAsmParser::parseSetNoReorderDirective() {
- Parser.Lex();
- // if this is not the end of the statement, report error
- if (getLexer().isNot(AsmToken::EndOfStatement)) {
- reportParseError("unexpected token in statement");
- return false;
- }
- Options.setNoreorder();
- Parser.Lex(); // Consume the EndOfStatement
+ Parser.Lex();
+ // If this is not the end of the statement, report an error.
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ reportParseError("unexpected token in statement");
return false;
+ }
+ Options.setNoreorder();
+ Parser.Lex(); // Consume the EndOfStatement.
+ return false;
}
bool MipsAsmParser::parseSetMacroDirective() {
Parser.Lex();
- // if this is not the end of the statement, report error
+ // If this is not the end of the statement, report an error.
if (getLexer().isNot(AsmToken::EndOfStatement)) {
reportParseError("unexpected token in statement");
return false;
}
Options.setMacro();
- Parser.Lex(); // Consume the EndOfStatement
+ Parser.Lex(); // Consume the EndOfStatement.
return false;
}
bool MipsAsmParser::parseSetNoMacroDirective() {
Parser.Lex();
- // if this is not the end of the statement, report error
+ // If this is not the end of the statement, report an error.
if (getLexer().isNot(AsmToken::EndOfStatement)) {
reportParseError("`noreorder' must be set before `nomacro'");
return false;
return false;
}
Options.setNomacro();
- Parser.Lex(); // Consume the EndOfStatement
+ Parser.Lex(); // Consume the EndOfStatement.
+ return false;
+}
+
+bool MipsAsmParser::parseSetAssignment() {
+ StringRef Name;
+ const MCExpr *Value;
+
+ if (Parser.parseIdentifier(Name))
+ reportParseError("expected identifier after .set");
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return reportParseError("unexpected token in .set directive");
+ Lex(); // Eat comma
+
+ if (getLexer().is(AsmToken::Dollar)) {
+ MCSymbol *Symbol;
+ SMLoc DollarLoc = getLexer().getLoc();
+ // Consume the dollar sign, and check for a following identifier.
+ Parser.Lex();
+ // We have a '$' followed by something, make sure they are adjacent.
+ if (DollarLoc.getPointer() + 1 != getTok().getLoc().getPointer())
+ return true;
+ StringRef Res = StringRef(DollarLoc.getPointer(),
+ getTok().getEndLoc().getPointer() - DollarLoc.getPointer());
+ Symbol = getContext().GetOrCreateSymbol(Res);
+ Parser.Lex();
+ Value = MCSymbolRefExpr::Create(Symbol, MCSymbolRefExpr::VK_None,
+ getContext());
+ } else if (Parser.parseExpression(Value))
+ return reportParseError("expected valid expression after comma");
+
+ // Check if the Name already exists as a symbol.
+ MCSymbol *Sym = getContext().LookupSymbol(Name);
+ if (Sym)
+ return reportParseError("symbol already defined");
+ Sym = getContext().GetOrCreateSymbol(Name);
+ Sym->setVariableValue(Value);
+
return false;
}
+
bool MipsAsmParser::parseDirectiveSet() {
- // get next token
+ // Get the next token.
const AsmToken &Tok = Parser.getTok();
if (Tok.getString() == "noat") {
} else if (Tok.getString() == "nomacro") {
return parseSetNoMacroDirective();
} else if (Tok.getString() == "nomips16") {
- // ignore this directive for now
+ // Ignore this directive for now.
Parser.eatToEndOfStatement();
return false;
} else if (Tok.getString() == "nomicromips") {
- // ignore this directive for now
+ // Ignore this directive for now.
Parser.eatToEndOfStatement();
return false;
+ } else {
+ // It is just an identifier, look for an assignment.
+ parseSetAssignment();
+ return false;
}
return true;
StringRef IDVal = DirectiveID.getString();
- if ( IDVal == ".ent") {
- // ignore this directive for now
+ if (IDVal == ".ent") {
+ // Ignore this directive for now.
Parser.Lex();
return false;
}
if (IDVal == ".end") {
- // ignore this directive for now
+ // Ignore this directive for now.
Parser.Lex();
return false;
}
if (IDVal == ".frame") {
- // ignore this directive for now
+ // Ignore this directive for now.
Parser.eatToEndOfStatement();
return false;
}
}
if (IDVal == ".fmask") {
- // ignore this directive for now
+ // Ignore this directive for now.
Parser.eatToEndOfStatement();
return false;
}
if (IDVal == ".mask") {
- // ignore this directive for now
+ // Ignore this directive for now.
Parser.eatToEndOfStatement();
return false;
}
if (IDVal == ".gpword") {
- // ignore this directive for now
+ // Ignore this directive for now.
Parser.eatToEndOfStatement();
return false;
}
projects / oota-llvm.git / blobdiff