1 //===-- PPCAsmParser.cpp - Parse PowerPC asm to MCInst instructions ---------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "MCTargetDesc/PPCMCTargetDesc.h"
11 #include "MCTargetDesc/PPCMCExpr.h"
12 #include "llvm/MC/MCTargetAsmParser.h"
13 #include "llvm/MC/MCStreamer.h"
14 #include "llvm/MC/MCExpr.h"
15 #include "llvm/MC/MCInst.h"
16 #include "llvm/MC/MCRegisterInfo.h"
17 #include "llvm/MC/MCSubtargetInfo.h"
18 #include "llvm/MC/MCParser/MCAsmLexer.h"
19 #include "llvm/MC/MCParser/MCAsmParser.h"
20 #include "llvm/MC/MCParser/MCParsedAsmOperand.h"
21 #include "llvm/ADT/SmallString.h"
22 #include "llvm/ADT/SmallVector.h"
23 #include "llvm/ADT/StringSwitch.h"
24 #include "llvm/ADT/Twine.h"
25 #include "llvm/Support/SourceMgr.h"
26 #include "llvm/Support/TargetRegistry.h"
27 #include "llvm/Support/raw_ostream.h"
33 static unsigned RRegs[32] = {
34 PPC::R0, PPC::R1, PPC::R2, PPC::R3,
35 PPC::R4, PPC::R5, PPC::R6, PPC::R7,
36 PPC::R8, PPC::R9, PPC::R10, PPC::R11,
37 PPC::R12, PPC::R13, PPC::R14, PPC::R15,
38 PPC::R16, PPC::R17, PPC::R18, PPC::R19,
39 PPC::R20, PPC::R21, PPC::R22, PPC::R23,
40 PPC::R24, PPC::R25, PPC::R26, PPC::R27,
41 PPC::R28, PPC::R29, PPC::R30, PPC::R31
43 static unsigned RRegsNoR0[32] = {
45 PPC::R1, PPC::R2, PPC::R3,
46 PPC::R4, PPC::R5, PPC::R6, PPC::R7,
47 PPC::R8, PPC::R9, PPC::R10, PPC::R11,
48 PPC::R12, PPC::R13, PPC::R14, PPC::R15,
49 PPC::R16, PPC::R17, PPC::R18, PPC::R19,
50 PPC::R20, PPC::R21, PPC::R22, PPC::R23,
51 PPC::R24, PPC::R25, PPC::R26, PPC::R27,
52 PPC::R28, PPC::R29, PPC::R30, PPC::R31
54 static unsigned XRegs[32] = {
55 PPC::X0, PPC::X1, PPC::X2, PPC::X3,
56 PPC::X4, PPC::X5, PPC::X6, PPC::X7,
57 PPC::X8, PPC::X9, PPC::X10, PPC::X11,
58 PPC::X12, PPC::X13, PPC::X14, PPC::X15,
59 PPC::X16, PPC::X17, PPC::X18, PPC::X19,
60 PPC::X20, PPC::X21, PPC::X22, PPC::X23,
61 PPC::X24, PPC::X25, PPC::X26, PPC::X27,
62 PPC::X28, PPC::X29, PPC::X30, PPC::X31
64 static unsigned XRegsNoX0[32] = {
66 PPC::X1, PPC::X2, PPC::X3,
67 PPC::X4, PPC::X5, PPC::X6, PPC::X7,
68 PPC::X8, PPC::X9, PPC::X10, PPC::X11,
69 PPC::X12, PPC::X13, PPC::X14, PPC::X15,
70 PPC::X16, PPC::X17, PPC::X18, PPC::X19,
71 PPC::X20, PPC::X21, PPC::X22, PPC::X23,
72 PPC::X24, PPC::X25, PPC::X26, PPC::X27,
73 PPC::X28, PPC::X29, PPC::X30, PPC::X31
75 static unsigned FRegs[32] = {
76 PPC::F0, PPC::F1, PPC::F2, PPC::F3,
77 PPC::F4, PPC::F5, PPC::F6, PPC::F7,
78 PPC::F8, PPC::F9, PPC::F10, PPC::F11,
79 PPC::F12, PPC::F13, PPC::F14, PPC::F15,
80 PPC::F16, PPC::F17, PPC::F18, PPC::F19,
81 PPC::F20, PPC::F21, PPC::F22, PPC::F23,
82 PPC::F24, PPC::F25, PPC::F26, PPC::F27,
83 PPC::F28, PPC::F29, PPC::F30, PPC::F31
85 static unsigned VRegs[32] = {
86 PPC::V0, PPC::V1, PPC::V2, PPC::V3,
87 PPC::V4, PPC::V5, PPC::V6, PPC::V7,
88 PPC::V8, PPC::V9, PPC::V10, PPC::V11,
89 PPC::V12, PPC::V13, PPC::V14, PPC::V15,
90 PPC::V16, PPC::V17, PPC::V18, PPC::V19,
91 PPC::V20, PPC::V21, PPC::V22, PPC::V23,
92 PPC::V24, PPC::V25, PPC::V26, PPC::V27,
93 PPC::V28, PPC::V29, PPC::V30, PPC::V31
95 static unsigned CRBITRegs[32] = {
96 PPC::CR0LT, PPC::CR0GT, PPC::CR0EQ, PPC::CR0UN,
97 PPC::CR1LT, PPC::CR1GT, PPC::CR1EQ, PPC::CR1UN,
98 PPC::CR2LT, PPC::CR2GT, PPC::CR2EQ, PPC::CR2UN,
99 PPC::CR3LT, PPC::CR3GT, PPC::CR3EQ, PPC::CR3UN,
100 PPC::CR4LT, PPC::CR4GT, PPC::CR4EQ, PPC::CR4UN,
101 PPC::CR5LT, PPC::CR5GT, PPC::CR5EQ, PPC::CR5UN,
102 PPC::CR6LT, PPC::CR6GT, PPC::CR6EQ, PPC::CR6UN,
103 PPC::CR7LT, PPC::CR7GT, PPC::CR7EQ, PPC::CR7UN
105 static unsigned CRRegs[8] = {
106 PPC::CR0, PPC::CR1, PPC::CR2, PPC::CR3,
107 PPC::CR4, PPC::CR5, PPC::CR6, PPC::CR7
112 class PPCAsmParser : public MCTargetAsmParser {
113 MCSubtargetInfo &STI;
117 MCAsmParser &getParser() const { return Parser; }
118 MCAsmLexer &getLexer() const { return Parser.getLexer(); }
120 void Warning(SMLoc L, const Twine &Msg) { Parser.Warning(L, Msg); }
121 bool Error(SMLoc L, const Twine &Msg) { return Parser.Error(L, Msg); }
123 bool isPPC64() const { return IsPPC64; }
125 bool MatchRegisterName(const AsmToken &Tok,
126 unsigned &RegNo, int64_t &IntVal);
128 virtual bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc);
130 const MCExpr *ExtractModifierFromExpr(const MCExpr *E,
131 PPCMCExpr::VariantKind &Variant);
132 bool ParseExpression(const MCExpr *&EVal);
134 bool ParseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands);
136 bool ParseDirectiveWord(unsigned Size, SMLoc L);
137 bool ParseDirectiveTC(unsigned Size, SMLoc L);
139 bool MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
140 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
141 MCStreamer &Out, unsigned &ErrorInfo,
142 bool MatchingInlineAsm);
144 void ProcessInstruction(MCInst &Inst,
145 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
147 /// @name Auto-generated Match Functions
150 #define GET_ASSEMBLER_HEADER
151 #include "PPCGenAsmMatcher.inc"
157 PPCAsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser)
158 : MCTargetAsmParser(), STI(_STI), Parser(_Parser) {
159 // Check for 64-bit vs. 32-bit pointer mode.
160 Triple TheTriple(STI.getTargetTriple());
161 IsPPC64 = TheTriple.getArch() == Triple::ppc64;
162 // Initialize the set of available features.
163 setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
166 virtual bool ParseInstruction(ParseInstructionInfo &Info,
167 StringRef Name, SMLoc NameLoc,
168 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
170 virtual bool ParseDirective(AsmToken DirectiveID);
173 /// PPCOperand - Instances of this class represent a parsed PowerPC machine
175 struct PPCOperand : public MCParsedAsmOperand {
182 SMLoc StartLoc, EndLoc;
204 PPCOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {}
206 PPCOperand(const PPCOperand &o) : MCParsedAsmOperand() {
208 StartLoc = o.StartLoc;
224 /// getStartLoc - Get the location of the first token of this operand.
225 SMLoc getStartLoc() const { return StartLoc; }
227 /// getEndLoc - Get the location of the last token of this operand.
228 SMLoc getEndLoc() const { return EndLoc; }
230 /// isPPC64 - True if this operand is for an instruction in 64-bit mode.
231 bool isPPC64() const { return IsPPC64; }
233 int64_t getImm() const {
234 assert(Kind == Immediate && "Invalid access!");
238 const MCExpr *getExpr() const {
239 assert(Kind == Expression && "Invalid access!");
243 unsigned getReg() const {
244 assert(isRegNumber() && "Invalid access!");
245 return (unsigned) Imm.Val;
248 unsigned getCCReg() const {
249 assert(isCCRegNumber() && "Invalid access!");
250 return (unsigned) Imm.Val;
253 unsigned getCRBitMask() const {
254 assert(isCRBitMask() && "Invalid access!");
255 return 7 - countTrailingZeros<uint64_t>(Imm.Val);
258 bool isToken() const { return Kind == Token; }
259 bool isImm() const { return Kind == Immediate || Kind == Expression; }
260 bool isU5Imm() const { return Kind == Immediate && isUInt<5>(getImm()); }
261 bool isS5Imm() const { return Kind == Immediate && isInt<5>(getImm()); }
262 bool isU6Imm() const { return Kind == Immediate && isUInt<6>(getImm()); }
263 bool isU16Imm() const { return Kind == Expression ||
264 (Kind == Immediate && isUInt<16>(getImm())); }
265 bool isS16Imm() const { return Kind == Expression ||
266 (Kind == Immediate && isInt<16>(getImm())); }
267 bool isS16ImmX4() const { return Kind == Expression ||
268 (Kind == Immediate && isInt<16>(getImm()) &&
269 (getImm() & 3) == 0); }
270 bool isDirectBr() const { return Kind == Expression ||
271 (Kind == Immediate && isInt<26>(getImm()) &&
272 (getImm() & 3) == 0); }
273 bool isCondBr() const { return Kind == Expression ||
274 (Kind == Immediate && isInt<16>(getImm()) &&
275 (getImm() & 3) == 0); }
276 bool isRegNumber() const { return Kind == Immediate && isUInt<5>(getImm()); }
277 bool isCCRegNumber() const { return Kind == Immediate &&
278 isUInt<3>(getImm()); }
279 bool isCRBitMask() const { return Kind == Immediate && isUInt<8>(getImm()) &&
280 isPowerOf2_32(getImm()); }
281 bool isMem() const { return false; }
282 bool isReg() const { return false; }
284 void addRegOperands(MCInst &Inst, unsigned N) const {
285 llvm_unreachable("addRegOperands");
288 void addRegGPRCOperands(MCInst &Inst, unsigned N) const {
289 assert(N == 1 && "Invalid number of operands!");
290 Inst.addOperand(MCOperand::CreateReg(RRegs[getReg()]));
293 void addRegGPRCNoR0Operands(MCInst &Inst, unsigned N) const {
294 assert(N == 1 && "Invalid number of operands!");
295 Inst.addOperand(MCOperand::CreateReg(RRegsNoR0[getReg()]));
298 void addRegG8RCOperands(MCInst &Inst, unsigned N) const {
299 assert(N == 1 && "Invalid number of operands!");
300 Inst.addOperand(MCOperand::CreateReg(XRegs[getReg()]));
303 void addRegG8RCNoX0Operands(MCInst &Inst, unsigned N) const {
304 assert(N == 1 && "Invalid number of operands!");
305 Inst.addOperand(MCOperand::CreateReg(XRegsNoX0[getReg()]));
308 void addRegGxRCOperands(MCInst &Inst, unsigned N) const {
310 addRegG8RCOperands(Inst, N);
312 addRegGPRCOperands(Inst, N);
315 void addRegGxRCNoR0Operands(MCInst &Inst, unsigned N) const {
317 addRegG8RCNoX0Operands(Inst, N);
319 addRegGPRCNoR0Operands(Inst, N);
322 void addRegF4RCOperands(MCInst &Inst, unsigned N) const {
323 assert(N == 1 && "Invalid number of operands!");
324 Inst.addOperand(MCOperand::CreateReg(FRegs[getReg()]));
327 void addRegF8RCOperands(MCInst &Inst, unsigned N) const {
328 assert(N == 1 && "Invalid number of operands!");
329 Inst.addOperand(MCOperand::CreateReg(FRegs[getReg()]));
332 void addRegVRRCOperands(MCInst &Inst, unsigned N) const {
333 assert(N == 1 && "Invalid number of operands!");
334 Inst.addOperand(MCOperand::CreateReg(VRegs[getReg()]));
337 void addRegCRBITRCOperands(MCInst &Inst, unsigned N) const {
338 assert(N == 1 && "Invalid number of operands!");
339 Inst.addOperand(MCOperand::CreateReg(CRBITRegs[getReg()]));
342 void addRegCRRCOperands(MCInst &Inst, unsigned N) const {
343 assert(N == 1 && "Invalid number of operands!");
344 Inst.addOperand(MCOperand::CreateReg(CRRegs[getCCReg()]));
347 void addCRBitMaskOperands(MCInst &Inst, unsigned N) const {
348 assert(N == 1 && "Invalid number of operands!");
349 Inst.addOperand(MCOperand::CreateReg(CRRegs[getCRBitMask()]));
352 void addImmOperands(MCInst &Inst, unsigned N) const {
353 assert(N == 1 && "Invalid number of operands!");
354 if (Kind == Immediate)
355 Inst.addOperand(MCOperand::CreateImm(getImm()));
357 Inst.addOperand(MCOperand::CreateExpr(getExpr()));
360 void addBranchTargetOperands(MCInst &Inst, unsigned N) const {
361 assert(N == 1 && "Invalid number of operands!");
362 if (Kind == Immediate)
363 Inst.addOperand(MCOperand::CreateImm(getImm() / 4));
365 Inst.addOperand(MCOperand::CreateExpr(getExpr()));
368 StringRef getToken() const {
369 assert(Kind == Token && "Invalid access!");
370 return StringRef(Tok.Data, Tok.Length);
373 virtual void print(raw_ostream &OS) const;
375 static PPCOperand *CreateToken(StringRef Str, SMLoc S, bool IsPPC64) {
376 PPCOperand *Op = new PPCOperand(Token);
377 Op->Tok.Data = Str.data();
378 Op->Tok.Length = Str.size();
381 Op->IsPPC64 = IsPPC64;
385 static PPCOperand *CreateImm(int64_t Val, SMLoc S, SMLoc E, bool IsPPC64) {
386 PPCOperand *Op = new PPCOperand(Immediate);
390 Op->IsPPC64 = IsPPC64;
394 static PPCOperand *CreateExpr(const MCExpr *Val,
395 SMLoc S, SMLoc E, bool IsPPC64) {
396 PPCOperand *Op = new PPCOperand(Expression);
400 Op->IsPPC64 = IsPPC64;
405 } // end anonymous namespace.
407 void PPCOperand::print(raw_ostream &OS) const {
410 OS << "'" << getToken() << "'";
416 getExpr()->print(OS);
423 ProcessInstruction(MCInst &Inst,
424 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
425 switch (Inst.getOpcode()) {
428 int64_t N = Inst.getOperand(2).getImm();
429 TmpInst.setOpcode(PPC::RLWINM);
430 TmpInst.addOperand(Inst.getOperand(0));
431 TmpInst.addOperand(Inst.getOperand(1));
432 TmpInst.addOperand(MCOperand::CreateImm(N));
433 TmpInst.addOperand(MCOperand::CreateImm(0));
434 TmpInst.addOperand(MCOperand::CreateImm(31 - N));
440 int64_t N = Inst.getOperand(2).getImm();
441 TmpInst.setOpcode(PPC::RLWINM);
442 TmpInst.addOperand(Inst.getOperand(0));
443 TmpInst.addOperand(Inst.getOperand(1));
444 TmpInst.addOperand(MCOperand::CreateImm(32 - N));
445 TmpInst.addOperand(MCOperand::CreateImm(N));
446 TmpInst.addOperand(MCOperand::CreateImm(31));
452 int64_t N = Inst.getOperand(2).getImm();
453 TmpInst.setOpcode(PPC::RLDICR);
454 TmpInst.addOperand(Inst.getOperand(0));
455 TmpInst.addOperand(Inst.getOperand(1));
456 TmpInst.addOperand(MCOperand::CreateImm(N));
457 TmpInst.addOperand(MCOperand::CreateImm(63 - N));
463 int64_t N = Inst.getOperand(2).getImm();
464 TmpInst.setOpcode(PPC::RLDICL);
465 TmpInst.addOperand(Inst.getOperand(0));
466 TmpInst.addOperand(Inst.getOperand(1));
467 TmpInst.addOperand(MCOperand::CreateImm(64 - N));
468 TmpInst.addOperand(MCOperand::CreateImm(N));
476 MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
477 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
478 MCStreamer &Out, unsigned &ErrorInfo,
479 bool MatchingInlineAsm) {
482 switch (MatchInstructionImpl(Operands, Inst, ErrorInfo, MatchingInlineAsm)) {
485 // Post-process instructions (typically extended mnemonics)
486 ProcessInstruction(Inst, Operands);
488 Out.EmitInstruction(Inst);
490 case Match_MissingFeature:
491 return Error(IDLoc, "instruction use requires an option to be enabled");
492 case Match_MnemonicFail:
493 return Error(IDLoc, "unrecognized instruction mnemonic");
494 case Match_InvalidOperand: {
495 SMLoc ErrorLoc = IDLoc;
496 if (ErrorInfo != ~0U) {
497 if (ErrorInfo >= Operands.size())
498 return Error(IDLoc, "too few operands for instruction");
500 ErrorLoc = ((PPCOperand*)Operands[ErrorInfo])->getStartLoc();
501 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
504 return Error(ErrorLoc, "invalid operand for instruction");
508 llvm_unreachable("Implement any new match types added!");
512 MatchRegisterName(const AsmToken &Tok, unsigned &RegNo, int64_t &IntVal) {
513 if (Tok.is(AsmToken::Identifier)) {
514 StringRef Name = Tok.getString();
516 if (Name.equals_lower("lr")) {
517 RegNo = isPPC64()? PPC::LR8 : PPC::LR;
520 } else if (Name.equals_lower("ctr")) {
521 RegNo = isPPC64()? PPC::CTR8 : PPC::CTR;
524 } else if (Name.substr(0, 1).equals_lower("r") &&
525 !Name.substr(1).getAsInteger(10, IntVal) && IntVal < 32) {
526 RegNo = isPPC64()? XRegs[IntVal] : RRegs[IntVal];
528 } else if (Name.substr(0, 1).equals_lower("f") &&
529 !Name.substr(1).getAsInteger(10, IntVal) && IntVal < 32) {
530 RegNo = FRegs[IntVal];
532 } else if (Name.substr(0, 1).equals_lower("v") &&
533 !Name.substr(1).getAsInteger(10, IntVal) && IntVal < 32) {
534 RegNo = VRegs[IntVal];
536 } else if (Name.substr(0, 2).equals_lower("cr") &&
537 !Name.substr(2).getAsInteger(10, IntVal) && IntVal < 8) {
538 RegNo = CRRegs[IntVal];
547 ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc) {
548 const AsmToken &Tok = Parser.getTok();
549 StartLoc = Tok.getLoc();
550 EndLoc = Tok.getEndLoc();
554 if (!MatchRegisterName(Tok, RegNo, IntVal)) {
555 Parser.Lex(); // Eat identifier token.
559 return Error(StartLoc, "invalid register name");
562 /// Extract @l/@ha modifier from expression. Recursively scan
563 /// the expression and check for VK_PPC_LO/HI/HA
564 /// symbol variants. If all symbols with modifier use the same
565 /// variant, return the corresponding PPCMCExpr::VariantKind,
566 /// and a modified expression using the default symbol variant.
567 /// Otherwise, return NULL.
568 const MCExpr *PPCAsmParser::
569 ExtractModifierFromExpr(const MCExpr *E,
570 PPCMCExpr::VariantKind &Variant) {
571 MCContext &Context = getParser().getContext();
572 Variant = PPCMCExpr::VK_PPC_None;
574 switch (E->getKind()) {
576 case MCExpr::Constant:
579 case MCExpr::SymbolRef: {
580 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
582 switch (SRE->getKind()) {
583 case MCSymbolRefExpr::VK_PPC_LO:
584 Variant = PPCMCExpr::VK_PPC_LO;
586 case MCSymbolRefExpr::VK_PPC_HI:
587 Variant = PPCMCExpr::VK_PPC_HI;
589 case MCSymbolRefExpr::VK_PPC_HA:
590 Variant = PPCMCExpr::VK_PPC_HA;
592 case MCSymbolRefExpr::VK_PPC_HIGHER:
593 Variant = PPCMCExpr::VK_PPC_HIGHER;
595 case MCSymbolRefExpr::VK_PPC_HIGHERA:
596 Variant = PPCMCExpr::VK_PPC_HIGHERA;
598 case MCSymbolRefExpr::VK_PPC_HIGHEST:
599 Variant = PPCMCExpr::VK_PPC_HIGHEST;
601 case MCSymbolRefExpr::VK_PPC_HIGHESTA:
602 Variant = PPCMCExpr::VK_PPC_HIGHESTA;
608 return MCSymbolRefExpr::Create(&SRE->getSymbol(), Context);
611 case MCExpr::Unary: {
612 const MCUnaryExpr *UE = cast<MCUnaryExpr>(E);
613 const MCExpr *Sub = ExtractModifierFromExpr(UE->getSubExpr(), Variant);
616 return MCUnaryExpr::Create(UE->getOpcode(), Sub, Context);
619 case MCExpr::Binary: {
620 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
621 PPCMCExpr::VariantKind LHSVariant, RHSVariant;
622 const MCExpr *LHS = ExtractModifierFromExpr(BE->getLHS(), LHSVariant);
623 const MCExpr *RHS = ExtractModifierFromExpr(BE->getRHS(), RHSVariant);
628 if (!LHS) LHS = BE->getLHS();
629 if (!RHS) RHS = BE->getRHS();
631 if (LHSVariant == PPCMCExpr::VK_PPC_None)
632 Variant = RHSVariant;
633 else if (RHSVariant == PPCMCExpr::VK_PPC_None)
634 Variant = LHSVariant;
635 else if (LHSVariant == RHSVariant)
636 Variant = LHSVariant;
640 return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, Context);
644 llvm_unreachable("Invalid expression kind!");
647 /// Parse an expression. This differs from the default "parseExpression"
648 /// in that it handles complex @l/@ha modifiers.
650 ParseExpression(const MCExpr *&EVal) {
651 if (getParser().parseExpression(EVal))
654 PPCMCExpr::VariantKind Variant;
655 const MCExpr *E = ExtractModifierFromExpr(EVal, Variant);
657 EVal = PPCMCExpr::Create(Variant, E, getParser().getContext());
663 ParseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
664 SMLoc S = Parser.getTok().getLoc();
665 SMLoc E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
669 // Attempt to parse the next token as an immediate
670 switch (getLexer().getKind()) {
671 // Special handling for register names. These are interpreted
672 // as immediates corresponding to the register number.
673 case AsmToken::Percent:
674 Parser.Lex(); // Eat the '%'.
677 if (!MatchRegisterName(Parser.getTok(), RegNo, IntVal)) {
678 Parser.Lex(); // Eat the identifier token.
679 Op = PPCOperand::CreateImm(IntVal, S, E, isPPC64());
680 Operands.push_back(Op);
683 return Error(S, "invalid register name");
685 // All other expressions
686 case AsmToken::LParen:
688 case AsmToken::Minus:
689 case AsmToken::Integer:
690 case AsmToken::Identifier:
692 case AsmToken::Dollar:
693 if (!ParseExpression(EVal))
697 return Error(S, "unknown operand");
700 if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(EVal))
701 Op = PPCOperand::CreateImm(CE->getValue(), S, E, isPPC64());
703 Op = PPCOperand::CreateExpr(EVal, S, E, isPPC64());
705 // Push the parsed operand into the list of operands
706 Operands.push_back(Op);
708 // Check for D-form memory operands
709 if (getLexer().is(AsmToken::LParen)) {
710 Parser.Lex(); // Eat the '('.
711 S = Parser.getTok().getLoc();
714 switch (getLexer().getKind()) {
715 case AsmToken::Percent:
716 Parser.Lex(); // Eat the '%'.
718 if (MatchRegisterName(Parser.getTok(), RegNo, IntVal))
719 return Error(S, "invalid register name");
720 Parser.Lex(); // Eat the identifier token.
723 case AsmToken::Integer:
724 if (getParser().parseAbsoluteExpression(IntVal) ||
725 IntVal < 0 || IntVal > 31)
726 return Error(S, "invalid register number");
730 return Error(S, "invalid memory operand");
733 if (getLexer().isNot(AsmToken::RParen))
734 return Error(Parser.getTok().getLoc(), "missing ')'");
735 E = Parser.getTok().getLoc();
736 Parser.Lex(); // Eat the ')'.
738 Op = PPCOperand::CreateImm(IntVal, S, E, isPPC64());
739 Operands.push_back(Op);
745 /// Parse an instruction mnemonic followed by its operands.
747 ParseInstruction(ParseInstructionInfo &Info, StringRef Name, SMLoc NameLoc,
748 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
749 // The first operand is the token for the instruction name.
750 // If the instruction ends in a '.', we need to create a separate
751 // token for it, to match what TableGen is doing.
752 size_t Dot = Name.find('.');
753 StringRef Mnemonic = Name.slice(0, Dot);
754 Operands.push_back(PPCOperand::CreateToken(Mnemonic, NameLoc, isPPC64()));
755 if (Dot != StringRef::npos) {
756 SMLoc DotLoc = SMLoc::getFromPointer(NameLoc.getPointer() + Dot);
757 StringRef DotStr = Name.slice(Dot, StringRef::npos);
758 Operands.push_back(PPCOperand::CreateToken(DotStr, DotLoc, isPPC64()));
761 // If there are no more operands then finish
762 if (getLexer().is(AsmToken::EndOfStatement))
765 // Parse the first operand
766 if (ParseOperand(Operands))
769 while (getLexer().isNot(AsmToken::EndOfStatement) &&
770 getLexer().is(AsmToken::Comma)) {
771 // Consume the comma token
774 // Parse the next operand
775 if (ParseOperand(Operands))
782 /// ParseDirective parses the PPC specific directives
783 bool PPCAsmParser::ParseDirective(AsmToken DirectiveID) {
784 StringRef IDVal = DirectiveID.getIdentifier();
785 if (IDVal == ".word")
786 return ParseDirectiveWord(4, DirectiveID.getLoc());
788 return ParseDirectiveTC(isPPC64()? 8 : 4, DirectiveID.getLoc());
792 /// ParseDirectiveWord
793 /// ::= .word [ expression (, expression)* ]
794 bool PPCAsmParser::ParseDirectiveWord(unsigned Size, SMLoc L) {
795 if (getLexer().isNot(AsmToken::EndOfStatement)) {
798 if (getParser().parseExpression(Value))
801 getParser().getStreamer().EmitValue(Value, Size);
803 if (getLexer().is(AsmToken::EndOfStatement))
806 if (getLexer().isNot(AsmToken::Comma))
807 return Error(L, "unexpected token in directive");
817 /// ::= .tc [ symbol (, expression)* ]
818 bool PPCAsmParser::ParseDirectiveTC(unsigned Size, SMLoc L) {
819 // Skip TC symbol, which is only used with XCOFF.
820 while (getLexer().isNot(AsmToken::EndOfStatement)
821 && getLexer().isNot(AsmToken::Comma))
823 if (getLexer().isNot(AsmToken::Comma))
824 return Error(L, "unexpected token in directive");
827 // Align to word size.
828 getParser().getStreamer().EmitValueToAlignment(Size);
831 return ParseDirectiveWord(Size, L);
834 /// Force static initialization.
835 extern "C" void LLVMInitializePowerPCAsmParser() {
836 RegisterMCAsmParser<PPCAsmParser> A(ThePPC32Target);
837 RegisterMCAsmParser<PPCAsmParser> B(ThePPC64Target);
840 #define GET_REGISTER_MATCHER
841 #define GET_MATCHER_IMPLEMENTATION
842 #include "PPCGenAsmMatcher.inc"