1 //===-- PPCAsmParser.cpp - Parse PowerPC asm to MCInst instructions ---------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "MCTargetDesc/PPCMCTargetDesc.h"
11 #include "MCTargetDesc/PPCMCExpr.h"
12 #include "PPCTargetStreamer.h"
13 #include "llvm/ADT/STLExtras.h"
14 #include "llvm/ADT/SmallString.h"
15 #include "llvm/ADT/SmallVector.h"
16 #include "llvm/ADT/StringSwitch.h"
17 #include "llvm/ADT/Twine.h"
18 #include "llvm/MC/MCContext.h"
19 #include "llvm/MC/MCExpr.h"
20 #include "llvm/MC/MCInst.h"
21 #include "llvm/MC/MCInstrInfo.h"
22 #include "llvm/MC/MCParser/MCAsmLexer.h"
23 #include "llvm/MC/MCParser/MCAsmParser.h"
24 #include "llvm/MC/MCParser/MCParsedAsmOperand.h"
25 #include "llvm/MC/MCRegisterInfo.h"
26 #include "llvm/MC/MCStreamer.h"
27 #include "llvm/MC/MCSymbolELF.h"
28 #include "llvm/MC/MCSubtargetInfo.h"
29 #include "llvm/MC/MCTargetAsmParser.h"
30 #include "llvm/Support/SourceMgr.h"
31 #include "llvm/Support/TargetRegistry.h"
32 #include "llvm/Support/raw_ostream.h"
33 
34 using namespace llvm;
35 
36 static const MCPhysReg RRegs[32] = {
37   PPC::R0,  PPC::R1,  PPC::R2,  PPC::R3,
38   PPC::R4,  PPC::R5,  PPC::R6,  PPC::R7,
39   PPC::R8,  PPC::R9,  PPC::R10, PPC::R11,
40   PPC::R12, PPC::R13, PPC::R14, PPC::R15,
41   PPC::R16, PPC::R17, PPC::R18, PPC::R19,
42   PPC::R20, PPC::R21, PPC::R22, PPC::R23,
43   PPC::R24, PPC::R25, PPC::R26, PPC::R27,
44   PPC::R28, PPC::R29, PPC::R30, PPC::R31
45 };
46 static const MCPhysReg RRegsNoR0[32] = {
47   PPC::ZERO,
48             PPC::R1,  PPC::R2,  PPC::R3,
49   PPC::R4,  PPC::R5,  PPC::R6,  PPC::R7,
50   PPC::R8,  PPC::R9,  PPC::R10, PPC::R11,
51   PPC::R12, PPC::R13, PPC::R14, PPC::R15,
52   PPC::R16, PPC::R17, PPC::R18, PPC::R19,
53   PPC::R20, PPC::R21, PPC::R22, PPC::R23,
54   PPC::R24, PPC::R25, PPC::R26, PPC::R27,
55   PPC::R28, PPC::R29, PPC::R30, PPC::R31
56 };
57 static const MCPhysReg XRegs[32] = {
58   PPC::X0,  PPC::X1,  PPC::X2,  PPC::X3,
59   PPC::X4,  PPC::X5,  PPC::X6,  PPC::X7,
60   PPC::X8,  PPC::X9,  PPC::X10, PPC::X11,
61   PPC::X12, PPC::X13, PPC::X14, PPC::X15,
62   PPC::X16, PPC::X17, PPC::X18, PPC::X19,
63   PPC::X20, PPC::X21, PPC::X22, PPC::X23,
64   PPC::X24, PPC::X25, PPC::X26, PPC::X27,
65   PPC::X28, PPC::X29, PPC::X30, PPC::X31
66 };
67 static const MCPhysReg XRegsNoX0[32] = {
68   PPC::ZERO8,
69             PPC::X1,  PPC::X2,  PPC::X3,
70   PPC::X4,  PPC::X5,  PPC::X6,  PPC::X7,
71   PPC::X8,  PPC::X9,  PPC::X10, PPC::X11,
72   PPC::X12, PPC::X13, PPC::X14, PPC::X15,
73   PPC::X16, PPC::X17, PPC::X18, PPC::X19,
74   PPC::X20, PPC::X21, PPC::X22, PPC::X23,
75   PPC::X24, PPC::X25, PPC::X26, PPC::X27,
76   PPC::X28, PPC::X29, PPC::X30, PPC::X31
77 };
78 static const MCPhysReg FRegs[32] = {
79   PPC::F0,  PPC::F1,  PPC::F2,  PPC::F3,
80   PPC::F4,  PPC::F5,  PPC::F6,  PPC::F7,
81   PPC::F8,  PPC::F9,  PPC::F10, PPC::F11,
82   PPC::F12, PPC::F13, PPC::F14, PPC::F15,
83   PPC::F16, PPC::F17, PPC::F18, PPC::F19,
84   PPC::F20, PPC::F21, PPC::F22, PPC::F23,
85   PPC::F24, PPC::F25, PPC::F26, PPC::F27,
86   PPC::F28, PPC::F29, PPC::F30, PPC::F31
87 };
88 static const MCPhysReg VRegs[32] = {
89   PPC::V0,  PPC::V1,  PPC::V2,  PPC::V3,
90   PPC::V4,  PPC::V5,  PPC::V6,  PPC::V7,
91   PPC::V8,  PPC::V9,  PPC::V10, PPC::V11,
92   PPC::V12, PPC::V13, PPC::V14, PPC::V15,
93   PPC::V16, PPC::V17, PPC::V18, PPC::V19,
94   PPC::V20, PPC::V21, PPC::V22, PPC::V23,
95   PPC::V24, PPC::V25, PPC::V26, PPC::V27,
96   PPC::V28, PPC::V29, PPC::V30, PPC::V31
97 };
98 static const MCPhysReg VSRegs[64] = {
99   PPC::VSL0,  PPC::VSL1,  PPC::VSL2,  PPC::VSL3,
100   PPC::VSL4,  PPC::VSL5,  PPC::VSL6,  PPC::VSL7,
101   PPC::VSL8,  PPC::VSL9,  PPC::VSL10, PPC::VSL11,
102   PPC::VSL12, PPC::VSL13, PPC::VSL14, PPC::VSL15,
103   PPC::VSL16, PPC::VSL17, PPC::VSL18, PPC::VSL19,
104   PPC::VSL20, PPC::VSL21, PPC::VSL22, PPC::VSL23,
105   PPC::VSL24, PPC::VSL25, PPC::VSL26, PPC::VSL27,
106   PPC::VSL28, PPC::VSL29, PPC::VSL30, PPC::VSL31,
107 
108   PPC::VSH0,  PPC::VSH1,  PPC::VSH2,  PPC::VSH3,
109   PPC::VSH4,  PPC::VSH5,  PPC::VSH6,  PPC::VSH7,
110   PPC::VSH8,  PPC::VSH9,  PPC::VSH10, PPC::VSH11,
111   PPC::VSH12, PPC::VSH13, PPC::VSH14, PPC::VSH15,
112   PPC::VSH16, PPC::VSH17, PPC::VSH18, PPC::VSH19,
113   PPC::VSH20, PPC::VSH21, PPC::VSH22, PPC::VSH23,
114   PPC::VSH24, PPC::VSH25, PPC::VSH26, PPC::VSH27,
115   PPC::VSH28, PPC::VSH29, PPC::VSH30, PPC::VSH31
116 };
117 static const MCPhysReg VSFRegs[64] = {
118   PPC::F0,  PPC::F1,  PPC::F2,  PPC::F3,
119   PPC::F4,  PPC::F5,  PPC::F6,  PPC::F7,
120   PPC::F8,  PPC::F9,  PPC::F10, PPC::F11,
121   PPC::F12, PPC::F13, PPC::F14, PPC::F15,
122   PPC::F16, PPC::F17, PPC::F18, PPC::F19,
123   PPC::F20, PPC::F21, PPC::F22, PPC::F23,
124   PPC::F24, PPC::F25, PPC::F26, PPC::F27,
125   PPC::F28, PPC::F29, PPC::F30, PPC::F31,
126 
127   PPC::VF0,  PPC::VF1,  PPC::VF2,  PPC::VF3,
128   PPC::VF4,  PPC::VF5,  PPC::VF6,  PPC::VF7,
129   PPC::VF8,  PPC::VF9,  PPC::VF10, PPC::VF11,
130   PPC::VF12, PPC::VF13, PPC::VF14, PPC::VF15,
131   PPC::VF16, PPC::VF17, PPC::VF18, PPC::VF19,
132   PPC::VF20, PPC::VF21, PPC::VF22, PPC::VF23,
133   PPC::VF24, PPC::VF25, PPC::VF26, PPC::VF27,
134   PPC::VF28, PPC::VF29, PPC::VF30, PPC::VF31
135 };
136 static const MCPhysReg VSSRegs[64] = {
137   PPC::F0,  PPC::F1,  PPC::F2,  PPC::F3,
138   PPC::F4,  PPC::F5,  PPC::F6,  PPC::F7,
139   PPC::F8,  PPC::F9,  PPC::F10, PPC::F11,
140   PPC::F12, PPC::F13, PPC::F14, PPC::F15,
141   PPC::F16, PPC::F17, PPC::F18, PPC::F19,
142   PPC::F20, PPC::F21, PPC::F22, PPC::F23,
143   PPC::F24, PPC::F25, PPC::F26, PPC::F27,
144   PPC::F28, PPC::F29, PPC::F30, PPC::F31,
145 
146   PPC::VF0,  PPC::VF1,  PPC::VF2,  PPC::VF3,
147   PPC::VF4,  PPC::VF5,  PPC::VF6,  PPC::VF7,
148   PPC::VF8,  PPC::VF9,  PPC::VF10, PPC::VF11,
149   PPC::VF12, PPC::VF13, PPC::VF14, PPC::VF15,
150   PPC::VF16, PPC::VF17, PPC::VF18, PPC::VF19,
151   PPC::VF20, PPC::VF21, PPC::VF22, PPC::VF23,
152   PPC::VF24, PPC::VF25, PPC::VF26, PPC::VF27,
153   PPC::VF28, PPC::VF29, PPC::VF30, PPC::VF31
154 };
155 static unsigned QFRegs[32] = {
156   PPC::QF0,  PPC::QF1,  PPC::QF2,  PPC::QF3,
157   PPC::QF4,  PPC::QF5,  PPC::QF6,  PPC::QF7,
158   PPC::QF8,  PPC::QF9,  PPC::QF10, PPC::QF11,
159   PPC::QF12, PPC::QF13, PPC::QF14, PPC::QF15,
160   PPC::QF16, PPC::QF17, PPC::QF18, PPC::QF19,
161   PPC::QF20, PPC::QF21, PPC::QF22, PPC::QF23,
162   PPC::QF24, PPC::QF25, PPC::QF26, PPC::QF27,
163   PPC::QF28, PPC::QF29, PPC::QF30, PPC::QF31
164 };
165 static const MCPhysReg CRBITRegs[32] = {
166   PPC::CR0LT, PPC::CR0GT, PPC::CR0EQ, PPC::CR0UN,
167   PPC::CR1LT, PPC::CR1GT, PPC::CR1EQ, PPC::CR1UN,
168   PPC::CR2LT, PPC::CR2GT, PPC::CR2EQ, PPC::CR2UN,
169   PPC::CR3LT, PPC::CR3GT, PPC::CR3EQ, PPC::CR3UN,
170   PPC::CR4LT, PPC::CR4GT, PPC::CR4EQ, PPC::CR4UN,
171   PPC::CR5LT, PPC::CR5GT, PPC::CR5EQ, PPC::CR5UN,
172   PPC::CR6LT, PPC::CR6GT, PPC::CR6EQ, PPC::CR6UN,
173   PPC::CR7LT, PPC::CR7GT, PPC::CR7EQ, PPC::CR7UN
174 };
175 static const MCPhysReg CRRegs[8] = {
176   PPC::CR0, PPC::CR1, PPC::CR2, PPC::CR3,
177   PPC::CR4, PPC::CR5, PPC::CR6, PPC::CR7
178 };
179 
180 // Evaluate an expression containing condition register
181 // or condition register field symbols.  Returns positive
182 // value on success, or -1 on error.
183 static int64_t
184 EvaluateCRExpr(const MCExpr *E) {
185   switch (E->getKind()) {
186   case MCExpr::Target:
187     return -1;
188 
189   case MCExpr::Constant: {
190     int64_t Res = cast<MCConstantExpr>(E)->getValue();
191     return Res < 0 ? -1 : Res;
192   }
193 
194   case MCExpr::SymbolRef: {
195     const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
196     StringRef Name = SRE->getSymbol().getName();
197 
198     if (Name == "lt") return 0;
199     if (Name == "gt") return 1;
200     if (Name == "eq") return 2;
201     if (Name == "so") return 3;
202     if (Name == "un") return 3;
203 
204     if (Name == "cr0") return 0;
205     if (Name == "cr1") return 1;
206     if (Name == "cr2") return 2;
207     if (Name == "cr3") return 3;
208     if (Name == "cr4") return 4;
209     if (Name == "cr5") return 5;
210     if (Name == "cr6") return 6;
211     if (Name == "cr7") return 7;
212 
213     return -1;
214   }
215 
216   case MCExpr::Unary:
217     return -1;
218 
219   case MCExpr::Binary: {
220     const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
221     int64_t LHSVal = EvaluateCRExpr(BE->getLHS());
222     int64_t RHSVal = EvaluateCRExpr(BE->getRHS());
223     int64_t Res;
224 
225     if (LHSVal < 0 || RHSVal < 0)
226       return -1;
227 
228     switch (BE->getOpcode()) {
229     default: return -1;
230     case MCBinaryExpr::Add: Res = LHSVal + RHSVal; break;
231     case MCBinaryExpr::Mul: Res = LHSVal * RHSVal; break;
232     }
233 
234     return Res < 0 ? -1 : Res;
235   }
236   }
237 
238   llvm_unreachable("Invalid expression kind!");
239 }
240 
241 namespace {
242 
243 struct PPCOperand;
244 
245 class PPCAsmParser : public MCTargetAsmParser {
246   MCSubtargetInfo &STI;
247   const MCInstrInfo &MII;
248   bool IsPPC64;
249   bool IsDarwin;
250 
251   void Warning(SMLoc L, const Twine &Msg) { getParser().Warning(L, Msg); }
252   bool Error(SMLoc L, const Twine &Msg) { return getParser().Error(L, Msg); }
253 
254   bool isPPC64() const { return IsPPC64; }
255   bool isDarwin() const { return IsDarwin; }
256 
257   bool MatchRegisterName(const AsmToken &Tok,
258                          unsigned &RegNo, int64_t &IntVal);
259 
260   bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc) override;
261 
262   const MCExpr *ExtractModifierFromExpr(const MCExpr *E,
263                                         PPCMCExpr::VariantKind &Variant);
264   const MCExpr *FixupVariantKind(const MCExpr *E);
265   bool ParseExpression(const MCExpr *&EVal);
266   bool ParseDarwinExpression(const MCExpr *&EVal);
267 
268   bool ParseOperand(OperandVector &Operands);
269 
270   bool ParseDirectiveWord(unsigned Size, SMLoc L);
271   bool ParseDirectiveTC(unsigned Size, SMLoc L);
272   bool ParseDirectiveMachine(SMLoc L);
273   bool ParseDarwinDirectiveMachine(SMLoc L);
274   bool ParseDirectiveAbiVersion(SMLoc L);
275   bool ParseDirectiveLocalEntry(SMLoc L);
276 
277   bool MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
278                                OperandVector &Operands, MCStreamer &Out,
279                                uint64_t &ErrorInfo,
280                                bool MatchingInlineAsm) override;
281 
282   void ProcessInstruction(MCInst &Inst, const OperandVector &Ops);
283 
284   /// @name Auto-generated Match Functions
285   /// {
286 
287 #define GET_ASSEMBLER_HEADER
288 #include "PPCGenAsmMatcher.inc"
289 
290   /// }
291 
292 
293 public:
294   PPCAsmParser(MCSubtargetInfo &STI, MCAsmParser &, const MCInstrInfo &MII,
295                const MCTargetOptions &Options)
296       : MCTargetAsmParser(), STI(STI), MII(MII) {
297     // Check for 64-bit vs. 32-bit pointer mode.
298     Triple TheTriple(STI.getTargetTriple());
299     IsPPC64 = (TheTriple.getArch() == Triple::ppc64 ||
300                TheTriple.getArch() == Triple::ppc64le);
301     IsDarwin = TheTriple.isMacOSX();
302     // Initialize the set of available features.
303     setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
304   }
305 
306   bool ParseInstruction(ParseInstructionInfo &Info, StringRef Name,
307                         SMLoc NameLoc, OperandVector &Operands) override;
308 
309   bool ParseDirective(AsmToken DirectiveID) override;
310 
311   unsigned validateTargetOperandClass(MCParsedAsmOperand &Op,
312                                       unsigned Kind) override;
313 
314   const MCExpr *applyModifierToExpr(const MCExpr *E,
315                                     MCSymbolRefExpr::VariantKind,
316                                     MCContext &Ctx) override;
317 };
318 
319 /// PPCOperand - Instances of this class represent a parsed PowerPC machine
320 /// instruction.
321 struct PPCOperand : public MCParsedAsmOperand {
322   enum KindTy {
323     Token,
324     Immediate,
325     ContextImmediate,
326     Expression,
327     TLSRegister
328   } Kind;
329 
330   SMLoc StartLoc, EndLoc;
331   bool IsPPC64;
332 
333   struct TokOp {
334     const char *Data;
335     unsigned Length;
336   };
337 
338   struct ImmOp {
339     int64_t Val;
340   };
341 
342   struct ExprOp {
343     const MCExpr *Val;
344     int64_t CRVal;     // Cached result of EvaluateCRExpr(Val)
345   };
346 
347   struct TLSRegOp {
348     const MCSymbolRefExpr *Sym;
349   };
350 
351   union {
352     struct TokOp Tok;
353     struct ImmOp Imm;
354     struct ExprOp Expr;
355     struct TLSRegOp TLSReg;
356   };
357 
358   PPCOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {}
359 public:
360   PPCOperand(const PPCOperand &o) : MCParsedAsmOperand() {
361     Kind = o.Kind;
362     StartLoc = o.StartLoc;
363     EndLoc = o.EndLoc;
364     IsPPC64 = o.IsPPC64;
365     switch (Kind) {
366     case Token:
367       Tok = o.Tok;
368       break;
369     case Immediate:
370     case ContextImmediate:
371       Imm = o.Imm;
372       break;
373     case Expression:
374       Expr = o.Expr;
375       break;
376     case TLSRegister:
377       TLSReg = o.TLSReg;
378       break;
379     }
380   }
381 
382   /// getStartLoc - Get the location of the first token of this operand.
383   SMLoc getStartLoc() const override { return StartLoc; }
384 
385   /// getEndLoc - Get the location of the last token of this operand.
386   SMLoc getEndLoc() const override { return EndLoc; }
387 
388   /// isPPC64 - True if this operand is for an instruction in 64-bit mode.
389   bool isPPC64() const { return IsPPC64; }
390 
391   int64_t getImm() const {
392     assert(Kind == Immediate && "Invalid access!");
393     return Imm.Val;
394   }
395   int64_t getImmS16Context() const {
396     assert((Kind == Immediate || Kind == ContextImmediate) && "Invalid access!");
397     if (Kind == Immediate)
398       return Imm.Val;
399     return static_cast<int16_t>(Imm.Val);
400   }
401   int64_t getImmU16Context() const {
402     assert((Kind == Immediate || Kind == ContextImmediate) && "Invalid access!");
403     return Imm.Val;
404   }
405 
406   const MCExpr *getExpr() const {
407     assert(Kind == Expression && "Invalid access!");
408     return Expr.Val;
409   }
410 
411   int64_t getExprCRVal() const {
412     assert(Kind == Expression && "Invalid access!");
413     return Expr.CRVal;
414   }
415 
416   const MCExpr *getTLSReg() const {
417     assert(Kind == TLSRegister && "Invalid access!");
418     return TLSReg.Sym;
419   }
420 
421   unsigned getReg() const override {
422     assert(isRegNumber() && "Invalid access!");
423     return (unsigned) Imm.Val;
424   }
425 
426   unsigned getVSReg() const {
427     assert(isVSRegNumber() && "Invalid access!");
428     return (unsigned) Imm.Val;
429   }
430 
431   unsigned getCCReg() const {
432     assert(isCCRegNumber() && "Invalid access!");
433     return (unsigned) (Kind == Immediate ? Imm.Val : Expr.CRVal);
434   }
435 
436   unsigned getCRBit() const {
437     assert(isCRBitNumber() && "Invalid access!");
438     return (unsigned) (Kind == Immediate ? Imm.Val : Expr.CRVal);
439   }
440 
441   unsigned getCRBitMask() const {
442     assert(isCRBitMask() && "Invalid access!");
443     return 7 - countTrailingZeros<uint64_t>(Imm.Val);
444   }
445 
446   bool isToken() const override { return Kind == Token; }
447   bool isImm() const override { return Kind == Immediate || Kind == Expression; }
448   bool isU1Imm() const { return Kind == Immediate && isUInt<1>(getImm()); }
449   bool isU2Imm() const { return Kind == Immediate && isUInt<2>(getImm()); }
450   bool isU3Imm() const { return Kind == Immediate && isUInt<3>(getImm()); }
451   bool isU4Imm() const { return Kind == Immediate && isUInt<4>(getImm()); }
452   bool isU5Imm() const { return Kind == Immediate && isUInt<5>(getImm()); }
453   bool isS5Imm() const { return Kind == Immediate && isInt<5>(getImm()); }
454   bool isU6Imm() const { return Kind == Immediate && isUInt<6>(getImm()); }
455   bool isU6ImmX2() const { return Kind == Immediate &&
456                                   isUInt<6>(getImm()) &&
457                                   (getImm() & 1) == 0; }
458   bool isU7ImmX4() const { return Kind == Immediate &&
459                                   isUInt<7>(getImm()) &&
460                                   (getImm() & 3) == 0; }
461   bool isU8ImmX8() const { return Kind == Immediate &&
462                                   isUInt<8>(getImm()) &&
463                                   (getImm() & 7) == 0; }
464 
465   bool isU10Imm() const { return Kind == Immediate && isUInt<10>(getImm()); }
466   bool isU12Imm() const { return Kind == Immediate && isUInt<12>(getImm()); }
467   bool isU16Imm() const {
468     switch (Kind) {
469       case Expression:
470         return true;
471       case Immediate:
472       case ContextImmediate:
473         return isUInt<16>(getImmU16Context());
474       default:
475         return false;
476     }
477   }
478   bool isS16Imm() const {
479     switch (Kind) {
480       case Expression:
481         return true;
482       case Immediate:
483       case ContextImmediate:
484         return isInt<16>(getImmS16Context());
485       default:
486         return false;
487     }
488   }
489   bool isS16ImmX4() const { return Kind == Expression ||
490                                    (Kind == Immediate && isInt<16>(getImm()) &&
491                                     (getImm() & 3) == 0); }
492   bool isS17Imm() const {
493     switch (Kind) {
494       case Expression:
495         return true;
496       case Immediate:
497       case ContextImmediate:
498         return isInt<17>(getImmS16Context());
499       default:
500         return false;
501     }
502   }
503   bool isTLSReg() const { return Kind == TLSRegister; }
504   bool isDirectBr() const {
505     if (Kind == Expression)
506       return true;
507     if (Kind != Immediate)
508       return false;
509     // Operand must be 64-bit aligned, signed 27-bit immediate.
510     if ((getImm() & 3) != 0)
511       return false;
512     if (isInt<26>(getImm()))
513       return true;
514     if (!IsPPC64) {
515       // In 32-bit mode, large 32-bit quantities wrap around.
516       if (isUInt<32>(getImm()) && isInt<26>(static_cast<int32_t>(getImm())))
517         return true;
518     }
519     return false;
520   }
521   bool isCondBr() const { return Kind == Expression ||
522                                  (Kind == Immediate && isInt<16>(getImm()) &&
523                                   (getImm() & 3) == 0); }
524   bool isRegNumber() const { return Kind == Immediate && isUInt<5>(getImm()); }
525   bool isVSRegNumber() const { return Kind == Immediate && isUInt<6>(getImm()); }
526   bool isCCRegNumber() const { return (Kind == Expression
527                                        && isUInt<3>(getExprCRVal())) ||
528                                       (Kind == Immediate
529                                        && isUInt<3>(getImm())); }
530   bool isCRBitNumber() const { return (Kind == Expression
531                                        && isUInt<5>(getExprCRVal())) ||
532                                       (Kind == Immediate
533                                        && isUInt<5>(getImm())); }
534   bool isCRBitMask() const { return Kind == Immediate && isUInt<8>(getImm()) &&
535                                     isPowerOf2_32(getImm()); }
536   bool isMem() const override { return false; }
537   bool isReg() const override { return false; }
538 
539   void addRegOperands(MCInst &Inst, unsigned N) const {
540     llvm_unreachable("addRegOperands");
541   }
542 
543   void addRegGPRCOperands(MCInst &Inst, unsigned N) const {
544     assert(N == 1 && "Invalid number of operands!");
545     Inst.addOperand(MCOperand::createReg(RRegs[getReg()]));
546   }
547 
548   void addRegGPRCNoR0Operands(MCInst &Inst, unsigned N) const {
549     assert(N == 1 && "Invalid number of operands!");
550     Inst.addOperand(MCOperand::createReg(RRegsNoR0[getReg()]));
551   }
552 
553   void addRegG8RCOperands(MCInst &Inst, unsigned N) const {
554     assert(N == 1 && "Invalid number of operands!");
555     Inst.addOperand(MCOperand::createReg(XRegs[getReg()]));
556   }
557 
558   void addRegG8RCNoX0Operands(MCInst &Inst, unsigned N) const {
559     assert(N == 1 && "Invalid number of operands!");
560     Inst.addOperand(MCOperand::createReg(XRegsNoX0[getReg()]));
561   }
562 
563   void addRegGxRCOperands(MCInst &Inst, unsigned N) const {
564     if (isPPC64())
565       addRegG8RCOperands(Inst, N);
566     else
567       addRegGPRCOperands(Inst, N);
568   }
569 
570   void addRegGxRCNoR0Operands(MCInst &Inst, unsigned N) const {
571     if (isPPC64())
572       addRegG8RCNoX0Operands(Inst, N);
573     else
574       addRegGPRCNoR0Operands(Inst, N);
575   }
576 
577   void addRegF4RCOperands(MCInst &Inst, unsigned N) const {
578     assert(N == 1 && "Invalid number of operands!");
579     Inst.addOperand(MCOperand::createReg(FRegs[getReg()]));
580   }
581 
582   void addRegF8RCOperands(MCInst &Inst, unsigned N) const {
583     assert(N == 1 && "Invalid number of operands!");
584     Inst.addOperand(MCOperand::createReg(FRegs[getReg()]));
585   }
586 
587   void addRegVRRCOperands(MCInst &Inst, unsigned N) const {
588     assert(N == 1 && "Invalid number of operands!");
589     Inst.addOperand(MCOperand::createReg(VRegs[getReg()]));
590   }
591 
592   void addRegVSRCOperands(MCInst &Inst, unsigned N) const {
593     assert(N == 1 && "Invalid number of operands!");
594     Inst.addOperand(MCOperand::createReg(VSRegs[getVSReg()]));
595   }
596 
597   void addRegVSFRCOperands(MCInst &Inst, unsigned N) const {
598     assert(N == 1 && "Invalid number of operands!");
599     Inst.addOperand(MCOperand::createReg(VSFRegs[getVSReg()]));
600   }
601 
602   void addRegVSSRCOperands(MCInst &Inst, unsigned N) const {
603     assert(N == 1 && "Invalid number of operands!");
604     Inst.addOperand(MCOperand::createReg(VSSRegs[getVSReg()]));
605   }
606 
607   void addRegQFRCOperands(MCInst &Inst, unsigned N) const {
608     assert(N == 1 && "Invalid number of operands!");
609     Inst.addOperand(MCOperand::createReg(QFRegs[getReg()]));
610   }
611 
612   void addRegQSRCOperands(MCInst &Inst, unsigned N) const {
613     assert(N == 1 && "Invalid number of operands!");
614     Inst.addOperand(MCOperand::createReg(QFRegs[getReg()]));
615   }
616 
617   void addRegQBRCOperands(MCInst &Inst, unsigned N) const {
618     assert(N == 1 && "Invalid number of operands!");
619     Inst.addOperand(MCOperand::createReg(QFRegs[getReg()]));
620   }
621 
622   void addRegCRBITRCOperands(MCInst &Inst, unsigned N) const {
623     assert(N == 1 && "Invalid number of operands!");
624     Inst.addOperand(MCOperand::createReg(CRBITRegs[getCRBit()]));
625   }
626 
627   void addRegCRRCOperands(MCInst &Inst, unsigned N) const {
628     assert(N == 1 && "Invalid number of operands!");
629     Inst.addOperand(MCOperand::createReg(CRRegs[getCCReg()]));
630   }
631 
632   void addCRBitMaskOperands(MCInst &Inst, unsigned N) const {
633     assert(N == 1 && "Invalid number of operands!");
634     Inst.addOperand(MCOperand::createReg(CRRegs[getCRBitMask()]));
635   }
636 
637   void addImmOperands(MCInst &Inst, unsigned N) const {
638     assert(N == 1 && "Invalid number of operands!");
639     if (Kind == Immediate)
640       Inst.addOperand(MCOperand::createImm(getImm()));
641     else
642       Inst.addOperand(MCOperand::createExpr(getExpr()));
643   }
644 
645   void addS16ImmOperands(MCInst &Inst, unsigned N) const {
646     assert(N == 1 && "Invalid number of operands!");
647     switch (Kind) {
648       case Immediate:
649         Inst.addOperand(MCOperand::createImm(getImm()));
650         break;
651       case ContextImmediate:
652         Inst.addOperand(MCOperand::createImm(getImmS16Context()));
653         break;
654       default:
655         Inst.addOperand(MCOperand::createExpr(getExpr()));
656         break;
657     }
658   }
659 
660   void addU16ImmOperands(MCInst &Inst, unsigned N) const {
661     assert(N == 1 && "Invalid number of operands!");
662     switch (Kind) {
663       case Immediate:
664         Inst.addOperand(MCOperand::createImm(getImm()));
665         break;
666       case ContextImmediate:
667         Inst.addOperand(MCOperand::createImm(getImmU16Context()));
668         break;
669       default:
670         Inst.addOperand(MCOperand::createExpr(getExpr()));
671         break;
672     }
673   }
674 
675   void addBranchTargetOperands(MCInst &Inst, unsigned N) const {
676     assert(N == 1 && "Invalid number of operands!");
677     if (Kind == Immediate)
678       Inst.addOperand(MCOperand::createImm(getImm() / 4));
679     else
680       Inst.addOperand(MCOperand::createExpr(getExpr()));
681   }
682 
683   void addTLSRegOperands(MCInst &Inst, unsigned N) const {
684     assert(N == 1 && "Invalid number of operands!");
685     Inst.addOperand(MCOperand::createExpr(getTLSReg()));
686   }
687 
688   StringRef getToken() const {
689     assert(Kind == Token && "Invalid access!");
690     return StringRef(Tok.Data, Tok.Length);
691   }
692 
693   void print(raw_ostream &OS) const override;
694 
695   static std::unique_ptr<PPCOperand> CreateToken(StringRef Str, SMLoc S,
696                                                  bool IsPPC64) {
697     auto Op = make_unique<PPCOperand>(Token);
698     Op->Tok.Data = Str.data();
699     Op->Tok.Length = Str.size();
700     Op->StartLoc = S;
701     Op->EndLoc = S;
702     Op->IsPPC64 = IsPPC64;
703     return Op;
704   }
705 
706   static std::unique_ptr<PPCOperand>
707   CreateTokenWithStringCopy(StringRef Str, SMLoc S, bool IsPPC64) {
708     // Allocate extra memory for the string and copy it.
709     // FIXME: This is incorrect, Operands are owned by unique_ptr with a default
710     // deleter which will destroy them by simply using "delete", not correctly
711     // calling operator delete on this extra memory after calling the dtor
712     // explicitly.
713     void *Mem = ::operator new(sizeof(PPCOperand) + Str.size());
714     std::unique_ptr<PPCOperand> Op(new (Mem) PPCOperand(Token));
715     Op->Tok.Data = reinterpret_cast<const char *>(Op.get() + 1);
716     Op->Tok.Length = Str.size();
717     std::memcpy(const_cast<char *>(Op->Tok.Data), Str.data(), Str.size());
718     Op->StartLoc = S;
719     Op->EndLoc = S;
720     Op->IsPPC64 = IsPPC64;
721     return Op;
722   }
723 
724   static std::unique_ptr<PPCOperand> CreateImm(int64_t Val, SMLoc S, SMLoc E,
725                                                bool IsPPC64) {
726     auto Op = make_unique<PPCOperand>(Immediate);
727     Op->Imm.Val = Val;
728     Op->StartLoc = S;
729     Op->EndLoc = E;
730     Op->IsPPC64 = IsPPC64;
731     return Op;
732   }
733 
734   static std::unique_ptr<PPCOperand> CreateExpr(const MCExpr *Val, SMLoc S,
735                                                 SMLoc E, bool IsPPC64) {
736     auto Op = make_unique<PPCOperand>(Expression);
737     Op->Expr.Val = Val;
738     Op->Expr.CRVal = EvaluateCRExpr(Val);
739     Op->StartLoc = S;
740     Op->EndLoc = E;
741     Op->IsPPC64 = IsPPC64;
742     return Op;
743   }
744 
745   static std::unique_ptr<PPCOperand>
746   CreateTLSReg(const MCSymbolRefExpr *Sym, SMLoc S, SMLoc E, bool IsPPC64) {
747     auto Op = make_unique<PPCOperand>(TLSRegister);
748     Op->TLSReg.Sym = Sym;
749     Op->StartLoc = S;
750     Op->EndLoc = E;
751     Op->IsPPC64 = IsPPC64;
752     return Op;
753   }
754 
755   static std::unique_ptr<PPCOperand>
756   CreateContextImm(int64_t Val, SMLoc S, SMLoc E, bool IsPPC64) {
757     auto Op = make_unique<PPCOperand>(ContextImmediate);
758     Op->Imm.Val = Val;
759     Op->StartLoc = S;
760     Op->EndLoc = E;
761     Op->IsPPC64 = IsPPC64;
762     return Op;
763   }
764 
765   static std::unique_ptr<PPCOperand>
766   CreateFromMCExpr(const MCExpr *Val, SMLoc S, SMLoc E, bool IsPPC64) {
767     if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Val))
768       return CreateImm(CE->getValue(), S, E, IsPPC64);
769 
770     if (const MCSymbolRefExpr *SRE = dyn_cast<MCSymbolRefExpr>(Val))
771       if (SRE->getKind() == MCSymbolRefExpr::VK_PPC_TLS)
772         return CreateTLSReg(SRE, S, E, IsPPC64);
773 
774     if (const PPCMCExpr *TE = dyn_cast<PPCMCExpr>(Val)) {
775       int64_t Res;
776       if (TE->evaluateAsConstant(Res))
777         return CreateContextImm(Res, S, E, IsPPC64);
778     }
779 
780     return CreateExpr(Val, S, E, IsPPC64);
781   }
782 };
783 
784 } // end anonymous namespace.
785 
786 void PPCOperand::print(raw_ostream &OS) const {
787   switch (Kind) {
788   case Token:
789     OS << "'" << getToken() << "'";
790     break;
791   case Immediate:
792   case ContextImmediate:
793     OS << getImm();
794     break;
795   case Expression:
796     OS << *getExpr();
797     break;
798   case TLSRegister:
799     OS << *getTLSReg();
800     break;
801   }
802 }
803 
804 static void
805 addNegOperand(MCInst &Inst, MCOperand &Op, MCContext &Ctx) {
806   if (Op.isImm()) {
807     Inst.addOperand(MCOperand::createImm(-Op.getImm()));
808     return;
809   }
810   const MCExpr *Expr = Op.getExpr();
811   if (const MCUnaryExpr *UnExpr = dyn_cast<MCUnaryExpr>(Expr)) {
812     if (UnExpr->getOpcode() == MCUnaryExpr::Minus) {
813       Inst.addOperand(MCOperand::createExpr(UnExpr->getSubExpr()));
814       return;
815     }
816   } else if (const MCBinaryExpr *BinExpr = dyn_cast<MCBinaryExpr>(Expr)) {
817     if (BinExpr->getOpcode() == MCBinaryExpr::Sub) {
818       const MCExpr *NE = MCBinaryExpr::createSub(BinExpr->getRHS(),
819                                                  BinExpr->getLHS(), Ctx);
820       Inst.addOperand(MCOperand::createExpr(NE));
821       return;
822     }
823   }
824   Inst.addOperand(MCOperand::createExpr(MCUnaryExpr::createMinus(Expr, Ctx)));
825 }
826 
827 void PPCAsmParser::ProcessInstruction(MCInst &Inst,
828                                       const OperandVector &Operands) {
829   int Opcode = Inst.getOpcode();
830   switch (Opcode) {
831   case PPC::DCBTx:
832   case PPC::DCBTT:
833   case PPC::DCBTSTx:
834   case PPC::DCBTSTT: {
835     MCInst TmpInst;
836     TmpInst.setOpcode((Opcode == PPC::DCBTx || Opcode == PPC::DCBTT) ?
837                       PPC::DCBT : PPC::DCBTST);
838     TmpInst.addOperand(MCOperand::createImm(
839       (Opcode == PPC::DCBTx || Opcode == PPC::DCBTSTx) ? 0 : 16));
840     TmpInst.addOperand(Inst.getOperand(0));
841     TmpInst.addOperand(Inst.getOperand(1));
842     Inst = TmpInst;
843     break;
844   }
845   case PPC::DCBTCT:
846   case PPC::DCBTDS: {
847     MCInst TmpInst;
848     TmpInst.setOpcode(PPC::DCBT);
849     TmpInst.addOperand(Inst.getOperand(2));
850     TmpInst.addOperand(Inst.getOperand(0));
851     TmpInst.addOperand(Inst.getOperand(1));
852     Inst = TmpInst;
853     break;
854   }
855   case PPC::DCBTSTCT:
856   case PPC::DCBTSTDS: {
857     MCInst TmpInst;
858     TmpInst.setOpcode(PPC::DCBTST);
859     TmpInst.addOperand(Inst.getOperand(2));
860     TmpInst.addOperand(Inst.getOperand(0));
861     TmpInst.addOperand(Inst.getOperand(1));
862     Inst = TmpInst;
863     break;
864   }
865   case PPC::LAx: {
866     MCInst TmpInst;
867     TmpInst.setOpcode(PPC::LA);
868     TmpInst.addOperand(Inst.getOperand(0));
869     TmpInst.addOperand(Inst.getOperand(2));
870     TmpInst.addOperand(Inst.getOperand(1));
871     Inst = TmpInst;
872     break;
873   }
874   case PPC::SUBI: {
875     MCInst TmpInst;
876     TmpInst.setOpcode(PPC::ADDI);
877     TmpInst.addOperand(Inst.getOperand(0));
878     TmpInst.addOperand(Inst.getOperand(1));
879     addNegOperand(TmpInst, Inst.getOperand(2), getContext());
880     Inst = TmpInst;
881     break;
882   }
883   case PPC::SUBIS: {
884     MCInst TmpInst;
885     TmpInst.setOpcode(PPC::ADDIS);
886     TmpInst.addOperand(Inst.getOperand(0));
887     TmpInst.addOperand(Inst.getOperand(1));
888     addNegOperand(TmpInst, Inst.getOperand(2), getContext());
889     Inst = TmpInst;
890     break;
891   }
892   case PPC::SUBIC: {
893     MCInst TmpInst;
894     TmpInst.setOpcode(PPC::ADDIC);
895     TmpInst.addOperand(Inst.getOperand(0));
896     TmpInst.addOperand(Inst.getOperand(1));
897     addNegOperand(TmpInst, Inst.getOperand(2), getContext());
898     Inst = TmpInst;
899     break;
900   }
901   case PPC::SUBICo: {
902     MCInst TmpInst;
903     TmpInst.setOpcode(PPC::ADDICo);
904     TmpInst.addOperand(Inst.getOperand(0));
905     TmpInst.addOperand(Inst.getOperand(1));
906     addNegOperand(TmpInst, Inst.getOperand(2), getContext());
907     Inst = TmpInst;
908     break;
909   }
910   case PPC::EXTLWI:
911   case PPC::EXTLWIo: {
912     MCInst TmpInst;
913     int64_t N = Inst.getOperand(2).getImm();
914     int64_t B = Inst.getOperand(3).getImm();
915     TmpInst.setOpcode(Opcode == PPC::EXTLWI? PPC::RLWINM : PPC::RLWINMo);
916     TmpInst.addOperand(Inst.getOperand(0));
917     TmpInst.addOperand(Inst.getOperand(1));
918     TmpInst.addOperand(MCOperand::createImm(B));
919     TmpInst.addOperand(MCOperand::createImm(0));
920     TmpInst.addOperand(MCOperand::createImm(N - 1));
921     Inst = TmpInst;
922     break;
923   }
924   case PPC::EXTRWI:
925   case PPC::EXTRWIo: {
926     MCInst TmpInst;
927     int64_t N = Inst.getOperand(2).getImm();
928     int64_t B = Inst.getOperand(3).getImm();
929     TmpInst.setOpcode(Opcode == PPC::EXTRWI? PPC::RLWINM : PPC::RLWINMo);
930     TmpInst.addOperand(Inst.getOperand(0));
931     TmpInst.addOperand(Inst.getOperand(1));
932     TmpInst.addOperand(MCOperand::createImm(B + N));
933     TmpInst.addOperand(MCOperand::createImm(32 - N));
934     TmpInst.addOperand(MCOperand::createImm(31));
935     Inst = TmpInst;
936     break;
937   }
938   case PPC::INSLWI:
939   case PPC::INSLWIo: {
940     MCInst TmpInst;
941     int64_t N = Inst.getOperand(2).getImm();
942     int64_t B = Inst.getOperand(3).getImm();
943     TmpInst.setOpcode(Opcode == PPC::INSLWI? PPC::RLWIMI : PPC::RLWIMIo);
944     TmpInst.addOperand(Inst.getOperand(0));
945     TmpInst.addOperand(Inst.getOperand(0));
946     TmpInst.addOperand(Inst.getOperand(1));
947     TmpInst.addOperand(MCOperand::createImm(32 - B));
948     TmpInst.addOperand(MCOperand::createImm(B));
949     TmpInst.addOperand(MCOperand::createImm((B + N) - 1));
950     Inst = TmpInst;
951     break;
952   }
953   case PPC::INSRWI:
954   case PPC::INSRWIo: {
955     MCInst TmpInst;
956     int64_t N = Inst.getOperand(2).getImm();
957     int64_t B = Inst.getOperand(3).getImm();
958     TmpInst.setOpcode(Opcode == PPC::INSRWI? PPC::RLWIMI : PPC::RLWIMIo);
959     TmpInst.addOperand(Inst.getOperand(0));
960     TmpInst.addOperand(Inst.getOperand(0));
961     TmpInst.addOperand(Inst.getOperand(1));
962     TmpInst.addOperand(MCOperand::createImm(32 - (B + N)));
963     TmpInst.addOperand(MCOperand::createImm(B));
964     TmpInst.addOperand(MCOperand::createImm((B + N) - 1));
965     Inst = TmpInst;
966     break;
967   }
968   case PPC::ROTRWI:
969   case PPC::ROTRWIo: {
970     MCInst TmpInst;
971     int64_t N = Inst.getOperand(2).getImm();
972     TmpInst.setOpcode(Opcode == PPC::ROTRWI? PPC::RLWINM : PPC::RLWINMo);
973     TmpInst.addOperand(Inst.getOperand(0));
974     TmpInst.addOperand(Inst.getOperand(1));
975     TmpInst.addOperand(MCOperand::createImm(32 - N));
976     TmpInst.addOperand(MCOperand::createImm(0));
977     TmpInst.addOperand(MCOperand::createImm(31));
978     Inst = TmpInst;
979     break;
980   }
981   case PPC::SLWI:
982   case PPC::SLWIo: {
983     MCInst TmpInst;
984     int64_t N = Inst.getOperand(2).getImm();
985     TmpInst.setOpcode(Opcode == PPC::SLWI? PPC::RLWINM : PPC::RLWINMo);
986     TmpInst.addOperand(Inst.getOperand(0));
987     TmpInst.addOperand(Inst.getOperand(1));
988     TmpInst.addOperand(MCOperand::createImm(N));
989     TmpInst.addOperand(MCOperand::createImm(0));
990     TmpInst.addOperand(MCOperand::createImm(31 - N));
991     Inst = TmpInst;
992     break;
993   }
994   case PPC::SRWI:
995   case PPC::SRWIo: {
996     MCInst TmpInst;
997     int64_t N = Inst.getOperand(2).getImm();
998     TmpInst.setOpcode(Opcode == PPC::SRWI? PPC::RLWINM : PPC::RLWINMo);
999     TmpInst.addOperand(Inst.getOperand(0));
1000     TmpInst.addOperand(Inst.getOperand(1));
1001     TmpInst.addOperand(MCOperand::createImm(32 - N));
1002     TmpInst.addOperand(MCOperand::createImm(N));
1003     TmpInst.addOperand(MCOperand::createImm(31));
1004     Inst = TmpInst;
1005     break;
1006   }
1007   case PPC::CLRRWI:
1008   case PPC::CLRRWIo: {
1009     MCInst TmpInst;
1010     int64_t N = Inst.getOperand(2).getImm();
1011     TmpInst.setOpcode(Opcode == PPC::CLRRWI? PPC::RLWINM : PPC::RLWINMo);
1012     TmpInst.addOperand(Inst.getOperand(0));
1013     TmpInst.addOperand(Inst.getOperand(1));
1014     TmpInst.addOperand(MCOperand::createImm(0));
1015     TmpInst.addOperand(MCOperand::createImm(0));
1016     TmpInst.addOperand(MCOperand::createImm(31 - N));
1017     Inst = TmpInst;
1018     break;
1019   }
1020   case PPC::CLRLSLWI:
1021   case PPC::CLRLSLWIo: {
1022     MCInst TmpInst;
1023     int64_t B = Inst.getOperand(2).getImm();
1024     int64_t N = Inst.getOperand(3).getImm();
1025     TmpInst.setOpcode(Opcode == PPC::CLRLSLWI? PPC::RLWINM : PPC::RLWINMo);
1026     TmpInst.addOperand(Inst.getOperand(0));
1027     TmpInst.addOperand(Inst.getOperand(1));
1028     TmpInst.addOperand(MCOperand::createImm(N));
1029     TmpInst.addOperand(MCOperand::createImm(B - N));
1030     TmpInst.addOperand(MCOperand::createImm(31 - N));
1031     Inst = TmpInst;
1032     break;
1033   }
1034   case PPC::EXTLDI:
1035   case PPC::EXTLDIo: {
1036     MCInst TmpInst;
1037     int64_t N = Inst.getOperand(2).getImm();
1038     int64_t B = Inst.getOperand(3).getImm();
1039     TmpInst.setOpcode(Opcode == PPC::EXTLDI? PPC::RLDICR : PPC::RLDICRo);
1040     TmpInst.addOperand(Inst.getOperand(0));
1041     TmpInst.addOperand(Inst.getOperand(1));
1042     TmpInst.addOperand(MCOperand::createImm(B));
1043     TmpInst.addOperand(MCOperand::createImm(N - 1));
1044     Inst = TmpInst;
1045     break;
1046   }
1047   case PPC::EXTRDI:
1048   case PPC::EXTRDIo: {
1049     MCInst TmpInst;
1050     int64_t N = Inst.getOperand(2).getImm();
1051     int64_t B = Inst.getOperand(3).getImm();
1052     TmpInst.setOpcode(Opcode == PPC::EXTRDI? PPC::RLDICL : PPC::RLDICLo);
1053     TmpInst.addOperand(Inst.getOperand(0));
1054     TmpInst.addOperand(Inst.getOperand(1));
1055     TmpInst.addOperand(MCOperand::createImm(B + N));
1056     TmpInst.addOperand(MCOperand::createImm(64 - N));
1057     Inst = TmpInst;
1058     break;
1059   }
1060   case PPC::INSRDI:
1061   case PPC::INSRDIo: {
1062     MCInst TmpInst;
1063     int64_t N = Inst.getOperand(2).getImm();
1064     int64_t B = Inst.getOperand(3).getImm();
1065     TmpInst.setOpcode(Opcode == PPC::INSRDI? PPC::RLDIMI : PPC::RLDIMIo);
1066     TmpInst.addOperand(Inst.getOperand(0));
1067     TmpInst.addOperand(Inst.getOperand(0));
1068     TmpInst.addOperand(Inst.getOperand(1));
1069     TmpInst.addOperand(MCOperand::createImm(64 - (B + N)));
1070     TmpInst.addOperand(MCOperand::createImm(B));
1071     Inst = TmpInst;
1072     break;
1073   }
1074   case PPC::ROTRDI:
1075   case PPC::ROTRDIo: {
1076     MCInst TmpInst;
1077     int64_t N = Inst.getOperand(2).getImm();
1078     TmpInst.setOpcode(Opcode == PPC::ROTRDI? PPC::RLDICL : PPC::RLDICLo);
1079     TmpInst.addOperand(Inst.getOperand(0));
1080     TmpInst.addOperand(Inst.getOperand(1));
1081     TmpInst.addOperand(MCOperand::createImm(64 - N));
1082     TmpInst.addOperand(MCOperand::createImm(0));
1083     Inst = TmpInst;
1084     break;
1085   }
1086   case PPC::SLDI:
1087   case PPC::SLDIo: {
1088     MCInst TmpInst;
1089     int64_t N = Inst.getOperand(2).getImm();
1090     TmpInst.setOpcode(Opcode == PPC::SLDI? PPC::RLDICR : PPC::RLDICRo);
1091     TmpInst.addOperand(Inst.getOperand(0));
1092     TmpInst.addOperand(Inst.getOperand(1));
1093     TmpInst.addOperand(MCOperand::createImm(N));
1094     TmpInst.addOperand(MCOperand::createImm(63 - N));
1095     Inst = TmpInst;
1096     break;
1097   }
1098   case PPC::SRDI:
1099   case PPC::SRDIo: {
1100     MCInst TmpInst;
1101     int64_t N = Inst.getOperand(2).getImm();
1102     TmpInst.setOpcode(Opcode == PPC::SRDI? PPC::RLDICL : PPC::RLDICLo);
1103     TmpInst.addOperand(Inst.getOperand(0));
1104     TmpInst.addOperand(Inst.getOperand(1));
1105     TmpInst.addOperand(MCOperand::createImm(64 - N));
1106     TmpInst.addOperand(MCOperand::createImm(N));
1107     Inst = TmpInst;
1108     break;
1109   }
1110   case PPC::CLRRDI:
1111   case PPC::CLRRDIo: {
1112     MCInst TmpInst;
1113     int64_t N = Inst.getOperand(2).getImm();
1114     TmpInst.setOpcode(Opcode == PPC::CLRRDI? PPC::RLDICR : PPC::RLDICRo);
1115     TmpInst.addOperand(Inst.getOperand(0));
1116     TmpInst.addOperand(Inst.getOperand(1));
1117     TmpInst.addOperand(MCOperand::createImm(0));
1118     TmpInst.addOperand(MCOperand::createImm(63 - N));
1119     Inst = TmpInst;
1120     break;
1121   }
1122   case PPC::CLRLSLDI:
1123   case PPC::CLRLSLDIo: {
1124     MCInst TmpInst;
1125     int64_t B = Inst.getOperand(2).getImm();
1126     int64_t N = Inst.getOperand(3).getImm();
1127     TmpInst.setOpcode(Opcode == PPC::CLRLSLDI? PPC::RLDIC : PPC::RLDICo);
1128     TmpInst.addOperand(Inst.getOperand(0));
1129     TmpInst.addOperand(Inst.getOperand(1));
1130     TmpInst.addOperand(MCOperand::createImm(N));
1131     TmpInst.addOperand(MCOperand::createImm(B - N));
1132     Inst = TmpInst;
1133     break;
1134   }
1135   case PPC::RLWINMbm:
1136   case PPC::RLWINMobm: {
1137     unsigned MB, ME;
1138     int64_t BM = Inst.getOperand(3).getImm();
1139     if (!isRunOfOnes(BM, MB, ME))
1140       break;
1141 
1142     MCInst TmpInst;
1143     TmpInst.setOpcode(Opcode == PPC::RLWINMbm ? PPC::RLWINM : PPC::RLWINMo);
1144     TmpInst.addOperand(Inst.getOperand(0));
1145     TmpInst.addOperand(Inst.getOperand(1));
1146     TmpInst.addOperand(Inst.getOperand(2));
1147     TmpInst.addOperand(MCOperand::createImm(MB));
1148     TmpInst.addOperand(MCOperand::createImm(ME));
1149     Inst = TmpInst;
1150     break;
1151   }
1152   case PPC::RLWIMIbm:
1153   case PPC::RLWIMIobm: {
1154     unsigned MB, ME;
1155     int64_t BM = Inst.getOperand(3).getImm();
1156     if (!isRunOfOnes(BM, MB, ME))
1157       break;
1158 
1159     MCInst TmpInst;
1160     TmpInst.setOpcode(Opcode == PPC::RLWIMIbm ? PPC::RLWIMI : PPC::RLWIMIo);
1161     TmpInst.addOperand(Inst.getOperand(0));
1162     TmpInst.addOperand(Inst.getOperand(0)); // The tied operand.
1163     TmpInst.addOperand(Inst.getOperand(1));
1164     TmpInst.addOperand(Inst.getOperand(2));
1165     TmpInst.addOperand(MCOperand::createImm(MB));
1166     TmpInst.addOperand(MCOperand::createImm(ME));
1167     Inst = TmpInst;
1168     break;
1169   }
1170   case PPC::RLWNMbm:
1171   case PPC::RLWNMobm: {
1172     unsigned MB, ME;
1173     int64_t BM = Inst.getOperand(3).getImm();
1174     if (!isRunOfOnes(BM, MB, ME))
1175       break;
1176 
1177     MCInst TmpInst;
1178     TmpInst.setOpcode(Opcode == PPC::RLWNMbm ? PPC::RLWNM : PPC::RLWNMo);
1179     TmpInst.addOperand(Inst.getOperand(0));
1180     TmpInst.addOperand(Inst.getOperand(1));
1181     TmpInst.addOperand(Inst.getOperand(2));
1182     TmpInst.addOperand(MCOperand::createImm(MB));
1183     TmpInst.addOperand(MCOperand::createImm(ME));
1184     Inst = TmpInst;
1185     break;
1186   }
1187   }
1188 }
1189 
1190 bool PPCAsmParser::MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
1191                                            OperandVector &Operands,
1192                                            MCStreamer &Out, uint64_t &ErrorInfo,
1193                                            bool MatchingInlineAsm) {
1194   MCInst Inst;
1195 
1196   switch (MatchInstructionImpl(Operands, Inst, ErrorInfo, MatchingInlineAsm)) {
1197   case Match_Success:
1198     // Post-process instructions (typically extended mnemonics)
1199     ProcessInstruction(Inst, Operands);
1200     Inst.setLoc(IDLoc);
1201     Out.EmitInstruction(Inst, STI);
1202     return false;
1203   case Match_MissingFeature:
1204     return Error(IDLoc, "instruction use requires an option to be enabled");
1205   case Match_MnemonicFail:
1206     return Error(IDLoc, "unrecognized instruction mnemonic");
1207   case Match_InvalidOperand: {
1208     SMLoc ErrorLoc = IDLoc;
1209     if (ErrorInfo != ~0ULL) {
1210       if (ErrorInfo >= Operands.size())
1211         return Error(IDLoc, "too few operands for instruction");
1212 
1213       ErrorLoc = ((PPCOperand &)*Operands[ErrorInfo]).getStartLoc();
1214       if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
1215     }
1216 
1217     return Error(ErrorLoc, "invalid operand for instruction");
1218   }
1219   }
1220 
1221   llvm_unreachable("Implement any new match types added!");
1222 }
1223 
1224 bool PPCAsmParser::
1225 MatchRegisterName(const AsmToken &Tok, unsigned &RegNo, int64_t &IntVal) {
1226   if (Tok.is(AsmToken::Identifier)) {
1227     StringRef Name = Tok.getString();
1228 
1229     if (Name.equals_lower("lr")) {
1230       RegNo = isPPC64()? PPC::LR8 : PPC::LR;
1231       IntVal = 8;
1232       return false;
1233     } else if (Name.equals_lower("ctr")) {
1234       RegNo = isPPC64()? PPC::CTR8 : PPC::CTR;
1235       IntVal = 9;
1236       return false;
1237     } else if (Name.equals_lower("vrsave")) {
1238       RegNo = PPC::VRSAVE;
1239       IntVal = 256;
1240       return false;
1241     } else if (Name.startswith_lower("r") &&
1242                !Name.substr(1).getAsInteger(10, IntVal) && IntVal < 32) {
1243       RegNo = isPPC64()? XRegs[IntVal] : RRegs[IntVal];
1244       return false;
1245     } else if (Name.startswith_lower("f") &&
1246                !Name.substr(1).getAsInteger(10, IntVal) && IntVal < 32) {
1247       RegNo = FRegs[IntVal];
1248       return false;
1249     } else if (Name.startswith_lower("vs") &&
1250                !Name.substr(2).getAsInteger(10, IntVal) && IntVal < 64) {
1251       RegNo = VSRegs[IntVal];
1252       return false;
1253     } else if (Name.startswith_lower("v") &&
1254                !Name.substr(1).getAsInteger(10, IntVal) && IntVal < 32) {
1255       RegNo = VRegs[IntVal];
1256       return false;
1257     } else if (Name.startswith_lower("q") &&
1258                !Name.substr(1).getAsInteger(10, IntVal) && IntVal < 32) {
1259       RegNo = QFRegs[IntVal];
1260       return false;
1261     } else if (Name.startswith_lower("cr") &&
1262                !Name.substr(2).getAsInteger(10, IntVal) && IntVal < 8) {
1263       RegNo = CRRegs[IntVal];
1264       return false;
1265     }
1266   }
1267 
1268   return true;
1269 }
1270 
1271 bool PPCAsmParser::
1272 ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc) {
1273   MCAsmParser &Parser = getParser();
1274   const AsmToken &Tok = Parser.getTok();
1275   StartLoc = Tok.getLoc();
1276   EndLoc = Tok.getEndLoc();
1277   RegNo = 0;
1278   int64_t IntVal;
1279 
1280   if (!MatchRegisterName(Tok, RegNo, IntVal)) {
1281     Parser.Lex(); // Eat identifier token.
1282     return false;
1283   }
1284 
1285   return Error(StartLoc, "invalid register name");
1286 }
1287 
1288 /// Extract \code @l/@ha \endcode modifier from expression.  Recursively scan
1289 /// the expression and check for VK_PPC_LO/HI/HA
1290 /// symbol variants.  If all symbols with modifier use the same
1291 /// variant, return the corresponding PPCMCExpr::VariantKind,
1292 /// and a modified expression using the default symbol variant.
1293 /// Otherwise, return NULL.
1294 const MCExpr *PPCAsmParser::
1295 ExtractModifierFromExpr(const MCExpr *E,
1296                         PPCMCExpr::VariantKind &Variant) {
1297   MCContext &Context = getParser().getContext();
1298   Variant = PPCMCExpr::VK_PPC_None;
1299 
1300   switch (E->getKind()) {
1301   case MCExpr::Target:
1302   case MCExpr::Constant:
1303     return nullptr;
1304 
1305   case MCExpr::SymbolRef: {
1306     const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
1307 
1308     switch (SRE->getKind()) {
1309     case MCSymbolRefExpr::VK_PPC_LO:
1310       Variant = PPCMCExpr::VK_PPC_LO;
1311       break;
1312     case MCSymbolRefExpr::VK_PPC_HI:
1313       Variant = PPCMCExpr::VK_PPC_HI;
1314       break;
1315     case MCSymbolRefExpr::VK_PPC_HA:
1316       Variant = PPCMCExpr::VK_PPC_HA;
1317       break;
1318     case MCSymbolRefExpr::VK_PPC_HIGHER:
1319       Variant = PPCMCExpr::VK_PPC_HIGHER;
1320       break;
1321     case MCSymbolRefExpr::VK_PPC_HIGHERA:
1322       Variant = PPCMCExpr::VK_PPC_HIGHERA;
1323       break;
1324     case MCSymbolRefExpr::VK_PPC_HIGHEST:
1325       Variant = PPCMCExpr::VK_PPC_HIGHEST;
1326       break;
1327     case MCSymbolRefExpr::VK_PPC_HIGHESTA:
1328       Variant = PPCMCExpr::VK_PPC_HIGHESTA;
1329       break;
1330     default:
1331       return nullptr;
1332     }
1333 
1334     return MCSymbolRefExpr::create(&SRE->getSymbol(), Context);
1335   }
1336 
1337   case MCExpr::Unary: {
1338     const MCUnaryExpr *UE = cast<MCUnaryExpr>(E);
1339     const MCExpr *Sub = ExtractModifierFromExpr(UE->getSubExpr(), Variant);
1340     if (!Sub)
1341       return nullptr;
1342     return MCUnaryExpr::create(UE->getOpcode(), Sub, Context);
1343   }
1344 
1345   case MCExpr::Binary: {
1346     const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
1347     PPCMCExpr::VariantKind LHSVariant, RHSVariant;
1348     const MCExpr *LHS = ExtractModifierFromExpr(BE->getLHS(), LHSVariant);
1349     const MCExpr *RHS = ExtractModifierFromExpr(BE->getRHS(), RHSVariant);
1350 
1351     if (!LHS && !RHS)
1352       return nullptr;
1353 
1354     if (!LHS) LHS = BE->getLHS();
1355     if (!RHS) RHS = BE->getRHS();
1356 
1357     if (LHSVariant == PPCMCExpr::VK_PPC_None)
1358       Variant = RHSVariant;
1359     else if (RHSVariant == PPCMCExpr::VK_PPC_None)
1360       Variant = LHSVariant;
1361     else if (LHSVariant == RHSVariant)
1362       Variant = LHSVariant;
1363     else
1364       return nullptr;
1365 
1366     return MCBinaryExpr::create(BE->getOpcode(), LHS, RHS, Context);
1367   }
1368   }
1369 
1370   llvm_unreachable("Invalid expression kind!");
1371 }
1372 
1373 /// Find all VK_TLSGD/VK_TLSLD symbol references in expression and replace
1374 /// them by VK_PPC_TLSGD/VK_PPC_TLSLD.  This is necessary to avoid having
1375 /// _GLOBAL_OFFSET_TABLE_ created via ELFObjectWriter::RelocNeedsGOT.
1376 /// FIXME: This is a hack.
1377 const MCExpr *PPCAsmParser::
1378 FixupVariantKind(const MCExpr *E) {
1379   MCContext &Context = getParser().getContext();
1380 
1381   switch (E->getKind()) {
1382   case MCExpr::Target:
1383   case MCExpr::Constant:
1384     return E;
1385 
1386   case MCExpr::SymbolRef: {
1387     const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
1388     MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
1389 
1390     switch (SRE->getKind()) {
1391     case MCSymbolRefExpr::VK_TLSGD:
1392       Variant = MCSymbolRefExpr::VK_PPC_TLSGD;
1393       break;
1394     case MCSymbolRefExpr::VK_TLSLD:
1395       Variant = MCSymbolRefExpr::VK_PPC_TLSLD;
1396       break;
1397     default:
1398       return E;
1399     }
1400     return MCSymbolRefExpr::create(&SRE->getSymbol(), Variant, Context);
1401   }
1402 
1403   case MCExpr::Unary: {
1404     const MCUnaryExpr *UE = cast<MCUnaryExpr>(E);
1405     const MCExpr *Sub = FixupVariantKind(UE->getSubExpr());
1406     if (Sub == UE->getSubExpr())
1407       return E;
1408     return MCUnaryExpr::create(UE->getOpcode(), Sub, Context);
1409   }
1410 
1411   case MCExpr::Binary: {
1412     const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
1413     const MCExpr *LHS = FixupVariantKind(BE->getLHS());
1414     const MCExpr *RHS = FixupVariantKind(BE->getRHS());
1415     if (LHS == BE->getLHS() && RHS == BE->getRHS())
1416       return E;
1417     return MCBinaryExpr::create(BE->getOpcode(), LHS, RHS, Context);
1418   }
1419   }
1420 
1421   llvm_unreachable("Invalid expression kind!");
1422 }
1423 
1424 /// ParseExpression.  This differs from the default "parseExpression" in that
1425 /// it handles modifiers.
1426 bool PPCAsmParser::
1427 ParseExpression(const MCExpr *&EVal) {
1428 
1429   if (isDarwin())
1430     return ParseDarwinExpression(EVal);
1431 
1432   // (ELF Platforms)
1433   // Handle \code @l/@ha \endcode
1434   if (getParser().parseExpression(EVal))
1435     return true;
1436 
1437   EVal = FixupVariantKind(EVal);
1438 
1439   PPCMCExpr::VariantKind Variant;
1440   const MCExpr *E = ExtractModifierFromExpr(EVal, Variant);
1441   if (E)
1442     EVal = PPCMCExpr::create(Variant, E, false, getParser().getContext());
1443 
1444   return false;
1445 }
1446 
1447 /// ParseDarwinExpression.  (MachO Platforms)
1448 /// This differs from the default "parseExpression" in that it handles detection
1449 /// of the \code hi16(), ha16() and lo16() \endcode modifiers.  At present,
1450 /// parseExpression() doesn't recognise the modifiers when in the Darwin/MachO
1451 /// syntax form so it is done here.  TODO: Determine if there is merit in arranging
1452 /// for this to be done at a higher level.
1453 bool PPCAsmParser::
1454 ParseDarwinExpression(const MCExpr *&EVal) {
1455   MCAsmParser &Parser = getParser();
1456   PPCMCExpr::VariantKind Variant = PPCMCExpr::VK_PPC_None;
1457   switch (getLexer().getKind()) {
1458   default:
1459     break;
1460   case AsmToken::Identifier:
1461     // Compiler-generated Darwin identifiers begin with L,l,_ or "; thus
1462     // something starting with any other char should be part of the
1463     // asm syntax.  If handwritten asm includes an identifier like lo16,
1464     // then all bets are off - but no-one would do that, right?
1465     StringRef poss = Parser.getTok().getString();
1466     if (poss.equals_lower("lo16")) {
1467       Variant = PPCMCExpr::VK_PPC_LO;
1468     } else if (poss.equals_lower("hi16")) {
1469       Variant = PPCMCExpr::VK_PPC_HI;
1470     } else if (poss.equals_lower("ha16")) {
1471       Variant = PPCMCExpr::VK_PPC_HA;
1472     }
1473     if (Variant != PPCMCExpr::VK_PPC_None) {
1474       Parser.Lex(); // Eat the xx16
1475       if (getLexer().isNot(AsmToken::LParen))
1476         return Error(Parser.getTok().getLoc(), "expected '('");
1477       Parser.Lex(); // Eat the '('
1478     }
1479     break;
1480   }
1481 
1482   if (getParser().parseExpression(EVal))
1483     return true;
1484 
1485   if (Variant != PPCMCExpr::VK_PPC_None) {
1486     if (getLexer().isNot(AsmToken::RParen))
1487       return Error(Parser.getTok().getLoc(), "expected ')'");
1488     Parser.Lex(); // Eat the ')'
1489     EVal = PPCMCExpr::create(Variant, EVal, false, getParser().getContext());
1490   }
1491   return false;
1492 }
1493 
1494 /// ParseOperand
1495 /// This handles registers in the form 'NN', '%rNN' for ELF platforms and
1496 /// rNN for MachO.
1497 bool PPCAsmParser::ParseOperand(OperandVector &Operands) {
1498   MCAsmParser &Parser = getParser();
1499   SMLoc S = Parser.getTok().getLoc();
1500   SMLoc E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
1501   const MCExpr *EVal;
1502 
1503   // Attempt to parse the next token as an immediate
1504   switch (getLexer().getKind()) {
1505   // Special handling for register names.  These are interpreted
1506   // as immediates corresponding to the register number.
1507   case AsmToken::Percent:
1508     Parser.Lex(); // Eat the '%'.
1509     unsigned RegNo;
1510     int64_t IntVal;
1511     if (!MatchRegisterName(Parser.getTok(), RegNo, IntVal)) {
1512       Parser.Lex(); // Eat the identifier token.
1513       Operands.push_back(PPCOperand::CreateImm(IntVal, S, E, isPPC64()));
1514       return false;
1515     }
1516     return Error(S, "invalid register name");
1517 
1518   case AsmToken::Identifier:
1519     // Note that non-register-name identifiers from the compiler will begin
1520     // with '_', 'L'/'l' or '"'.  Of course, handwritten asm could include
1521     // identifiers like r31foo - so we fall through in the event that parsing
1522     // a register name fails.
1523     if (isDarwin()) {
1524       unsigned RegNo;
1525       int64_t IntVal;
1526       if (!MatchRegisterName(Parser.getTok(), RegNo, IntVal)) {
1527         Parser.Lex(); // Eat the identifier token.
1528         Operands.push_back(PPCOperand::CreateImm(IntVal, S, E, isPPC64()));
1529         return false;
1530       }
1531     }
1532   // Fall-through to process non-register-name identifiers as expression.
1533   // All other expressions
1534   case AsmToken::LParen:
1535   case AsmToken::Plus:
1536   case AsmToken::Minus:
1537   case AsmToken::Integer:
1538   case AsmToken::Dot:
1539   case AsmToken::Dollar:
1540   case AsmToken::Exclaim:
1541   case AsmToken::Tilde:
1542     if (!ParseExpression(EVal))
1543       break;
1544     /* fall through */
1545   default:
1546     return Error(S, "unknown operand");
1547   }
1548 
1549   // Push the parsed operand into the list of operands
1550   Operands.push_back(PPCOperand::CreateFromMCExpr(EVal, S, E, isPPC64()));
1551 
1552   // Check whether this is a TLS call expression
1553   bool TLSCall = false;
1554   if (const MCSymbolRefExpr *Ref = dyn_cast<MCSymbolRefExpr>(EVal))
1555     TLSCall = Ref->getSymbol().getName() == "__tls_get_addr";
1556 
1557   if (TLSCall && getLexer().is(AsmToken::LParen)) {
1558     const MCExpr *TLSSym;
1559 
1560     Parser.Lex(); // Eat the '('.
1561     S = Parser.getTok().getLoc();
1562     if (ParseExpression(TLSSym))
1563       return Error(S, "invalid TLS call expression");
1564     if (getLexer().isNot(AsmToken::RParen))
1565       return Error(Parser.getTok().getLoc(), "missing ')'");
1566     E = Parser.getTok().getLoc();
1567     Parser.Lex(); // Eat the ')'.
1568 
1569     Operands.push_back(PPCOperand::CreateFromMCExpr(TLSSym, S, E, isPPC64()));
1570   }
1571 
1572   // Otherwise, check for D-form memory operands
1573   if (!TLSCall && getLexer().is(AsmToken::LParen)) {
1574     Parser.Lex(); // Eat the '('.
1575     S = Parser.getTok().getLoc();
1576 
1577     int64_t IntVal;
1578     switch (getLexer().getKind()) {
1579     case AsmToken::Percent:
1580       Parser.Lex(); // Eat the '%'.
1581       unsigned RegNo;
1582       if (MatchRegisterName(Parser.getTok(), RegNo, IntVal))
1583         return Error(S, "invalid register name");
1584       Parser.Lex(); // Eat the identifier token.
1585       break;
1586 
1587     case AsmToken::Integer:
1588       if (!isDarwin()) {
1589         if (getParser().parseAbsoluteExpression(IntVal) ||
1590           IntVal < 0 || IntVal > 31)
1591         return Error(S, "invalid register number");
1592       } else {
1593         return Error(S, "unexpected integer value");
1594       }
1595       break;
1596 
1597    case AsmToken::Identifier:
1598     if (isDarwin()) {
1599       unsigned RegNo;
1600       if (!MatchRegisterName(Parser.getTok(), RegNo, IntVal)) {
1601         Parser.Lex(); // Eat the identifier token.
1602         break;
1603       }
1604     }
1605     // Fall-through..
1606 
1607     default:
1608       return Error(S, "invalid memory operand");
1609     }
1610 
1611     if (getLexer().isNot(AsmToken::RParen))
1612       return Error(Parser.getTok().getLoc(), "missing ')'");
1613     E = Parser.getTok().getLoc();
1614     Parser.Lex(); // Eat the ')'.
1615 
1616     Operands.push_back(PPCOperand::CreateImm(IntVal, S, E, isPPC64()));
1617   }
1618 
1619   return false;
1620 }
1621 
1622 /// Parse an instruction mnemonic followed by its operands.
1623 bool PPCAsmParser::ParseInstruction(ParseInstructionInfo &Info, StringRef Name,
1624                                     SMLoc NameLoc, OperandVector &Operands) {
1625   // The first operand is the token for the instruction name.
1626   // If the next character is a '+' or '-', we need to add it to the
1627   // instruction name, to match what TableGen is doing.
1628   std::string NewOpcode;
1629   if (getLexer().is(AsmToken::Plus)) {
1630     getLexer().Lex();
1631     NewOpcode = Name;
1632     NewOpcode += '+';
1633     Name = NewOpcode;
1634   }
1635   if (getLexer().is(AsmToken::Minus)) {
1636     getLexer().Lex();
1637     NewOpcode = Name;
1638     NewOpcode += '-';
1639     Name = NewOpcode;
1640   }
1641   // If the instruction ends in a '.', we need to create a separate
1642   // token for it, to match what TableGen is doing.
1643   size_t Dot = Name.find('.');
1644   StringRef Mnemonic = Name.slice(0, Dot);
1645   if (!NewOpcode.empty()) // Underlying memory for Name is volatile.
1646     Operands.push_back(
1647         PPCOperand::CreateTokenWithStringCopy(Mnemonic, NameLoc, isPPC64()));
1648   else
1649     Operands.push_back(PPCOperand::CreateToken(Mnemonic, NameLoc, isPPC64()));
1650   if (Dot != StringRef::npos) {
1651     SMLoc DotLoc = SMLoc::getFromPointer(NameLoc.getPointer() + Dot);
1652     StringRef DotStr = Name.slice(Dot, StringRef::npos);
1653     if (!NewOpcode.empty()) // Underlying memory for Name is volatile.
1654       Operands.push_back(
1655           PPCOperand::CreateTokenWithStringCopy(DotStr, DotLoc, isPPC64()));
1656     else
1657       Operands.push_back(PPCOperand::CreateToken(DotStr, DotLoc, isPPC64()));
1658   }
1659 
1660   // If there are no more operands then finish
1661   if (getLexer().is(AsmToken::EndOfStatement))
1662     return false;
1663 
1664   // Parse the first operand
1665   if (ParseOperand(Operands))
1666     return true;
1667 
1668   while (getLexer().isNot(AsmToken::EndOfStatement) &&
1669          getLexer().is(AsmToken::Comma)) {
1670     // Consume the comma token
1671     getLexer().Lex();
1672 
1673     // Parse the next operand
1674     if (ParseOperand(Operands))
1675       return true;
1676   }
1677 
1678   // We'll now deal with an unfortunate special case: the syntax for the dcbt
1679   // and dcbtst instructions differs for server vs. embedded cores.
1680   //  The syntax for dcbt is:
1681   //    dcbt ra, rb, th [server]
1682   //    dcbt th, ra, rb [embedded]
1683   //  where th can be omitted when it is 0. dcbtst is the same. We take the
1684   //  server form to be the default, so swap the operands if we're parsing for
1685   //  an embedded core (they'll be swapped again upon printing).
1686   if (STI.getFeatureBits()[PPC::FeatureBookE] &&
1687       Operands.size() == 4 &&
1688       (Name == "dcbt" || Name == "dcbtst")) {
1689     std::swap(Operands[1], Operands[3]);
1690     std::swap(Operands[2], Operands[1]);
1691   }
1692 
1693   return false;
1694 }
1695 
1696 /// ParseDirective parses the PPC specific directives
1697 bool PPCAsmParser::ParseDirective(AsmToken DirectiveID) {
1698   StringRef IDVal = DirectiveID.getIdentifier();
1699   if (!isDarwin()) {
1700     if (IDVal == ".word")
1701       return ParseDirectiveWord(2, DirectiveID.getLoc());
1702     if (IDVal == ".llong")
1703       return ParseDirectiveWord(8, DirectiveID.getLoc());
1704     if (IDVal == ".tc")
1705       return ParseDirectiveTC(isPPC64()? 8 : 4, DirectiveID.getLoc());
1706     if (IDVal == ".machine")
1707       return ParseDirectiveMachine(DirectiveID.getLoc());
1708     if (IDVal == ".abiversion")
1709       return ParseDirectiveAbiVersion(DirectiveID.getLoc());
1710     if (IDVal == ".localentry")
1711       return ParseDirectiveLocalEntry(DirectiveID.getLoc());
1712   } else {
1713     if (IDVal == ".machine")
1714       return ParseDarwinDirectiveMachine(DirectiveID.getLoc());
1715   }
1716   return true;
1717 }
1718 
1719 /// ParseDirectiveWord
1720 ///  ::= .word [ expression (, expression)* ]
1721 bool PPCAsmParser::ParseDirectiveWord(unsigned Size, SMLoc L) {
1722   MCAsmParser &Parser = getParser();
1723   if (getLexer().isNot(AsmToken::EndOfStatement)) {
1724     for (;;) {
1725       const MCExpr *Value;
1726       if (getParser().parseExpression(Value))
1727         return false;
1728 
1729       getParser().getStreamer().EmitValue(Value, Size);
1730 
1731       if (getLexer().is(AsmToken::EndOfStatement))
1732         break;
1733 
1734       if (getLexer().isNot(AsmToken::Comma))
1735         return Error(L, "unexpected token in directive");
1736       Parser.Lex();
1737     }
1738   }
1739 
1740   Parser.Lex();
1741   return false;
1742 }
1743 
1744 /// ParseDirectiveTC
1745 ///  ::= .tc [ symbol (, expression)* ]
1746 bool PPCAsmParser::ParseDirectiveTC(unsigned Size, SMLoc L) {
1747   MCAsmParser &Parser = getParser();
1748   // Skip TC symbol, which is only used with XCOFF.
1749   while (getLexer().isNot(AsmToken::EndOfStatement)
1750          && getLexer().isNot(AsmToken::Comma))
1751     Parser.Lex();
1752   if (getLexer().isNot(AsmToken::Comma)) {
1753     Error(L, "unexpected token in directive");
1754     return false;
1755   }
1756   Parser.Lex();
1757 
1758   // Align to word size.
1759   getParser().getStreamer().EmitValueToAlignment(Size);
1760 
1761   // Emit expressions.
1762   return ParseDirectiveWord(Size, L);
1763 }
1764 
1765 /// ParseDirectiveMachine (ELF platforms)
1766 ///  ::= .machine [ cpu | "push" | "pop" ]
1767 bool PPCAsmParser::ParseDirectiveMachine(SMLoc L) {
1768   MCAsmParser &Parser = getParser();
1769   if (getLexer().isNot(AsmToken::Identifier) &&
1770       getLexer().isNot(AsmToken::String)) {
1771     Error(L, "unexpected token in directive");
1772     return false;
1773   }
1774 
1775   StringRef CPU = Parser.getTok().getIdentifier();
1776   Parser.Lex();
1777 
1778   // FIXME: Right now, the parser always allows any available
1779   // instruction, so the .machine directive is not useful.
1780   // Implement ".machine any" (by doing nothing) for the benefit
1781   // of existing assembler code.  Likewise, we can then implement
1782   // ".machine push" and ".machine pop" as no-op.
1783   if (CPU != "any" && CPU != "push" && CPU != "pop") {
1784     Error(L, "unrecognized machine type");
1785     return false;
1786   }
1787 
1788   if (getLexer().isNot(AsmToken::EndOfStatement)) {
1789     Error(L, "unexpected token in directive");
1790     return false;
1791   }
1792   PPCTargetStreamer &TStreamer =
1793       *static_cast<PPCTargetStreamer *>(
1794            getParser().getStreamer().getTargetStreamer());
1795   TStreamer.emitMachine(CPU);
1796 
1797   return false;
1798 }
1799 
1800 /// ParseDarwinDirectiveMachine (Mach-o platforms)
1801 ///  ::= .machine cpu-identifier
1802 bool PPCAsmParser::ParseDarwinDirectiveMachine(SMLoc L) {
1803   MCAsmParser &Parser = getParser();
1804   if (getLexer().isNot(AsmToken::Identifier) &&
1805       getLexer().isNot(AsmToken::String)) {
1806     Error(L, "unexpected token in directive");
1807     return false;
1808   }
1809 
1810   StringRef CPU = Parser.getTok().getIdentifier();
1811   Parser.Lex();
1812 
1813   // FIXME: this is only the 'default' set of cpu variants.
1814   // However we don't act on this information at present, this is simply
1815   // allowing parsing to proceed with minimal sanity checking.
1816   if (CPU != "ppc7400" && CPU != "ppc" && CPU != "ppc64") {
1817     Error(L, "unrecognized cpu type");
1818     return false;
1819   }
1820 
1821   if (isPPC64() && (CPU == "ppc7400" || CPU == "ppc")) {
1822     Error(L, "wrong cpu type specified for 64bit");
1823     return false;
1824   }
1825   if (!isPPC64() && CPU == "ppc64") {
1826     Error(L, "wrong cpu type specified for 32bit");
1827     return false;
1828   }
1829 
1830   if (getLexer().isNot(AsmToken::EndOfStatement)) {
1831     Error(L, "unexpected token in directive");
1832     return false;
1833   }
1834 
1835   return false;
1836 }
1837 
1838 /// ParseDirectiveAbiVersion
1839 ///  ::= .abiversion constant-expression
1840 bool PPCAsmParser::ParseDirectiveAbiVersion(SMLoc L) {
1841   int64_t AbiVersion;
1842   if (getParser().parseAbsoluteExpression(AbiVersion)){
1843     Error(L, "expected constant expression");
1844     return false;
1845   }
1846   if (getLexer().isNot(AsmToken::EndOfStatement)) {
1847     Error(L, "unexpected token in directive");
1848     return false;
1849   }
1850 
1851   PPCTargetStreamer &TStreamer =
1852       *static_cast<PPCTargetStreamer *>(
1853            getParser().getStreamer().getTargetStreamer());
1854   TStreamer.emitAbiVersion(AbiVersion);
1855 
1856   return false;
1857 }
1858 
1859 /// ParseDirectiveLocalEntry
1860 ///  ::= .localentry symbol, expression
1861 bool PPCAsmParser::ParseDirectiveLocalEntry(SMLoc L) {
1862   StringRef Name;
1863   if (getParser().parseIdentifier(Name)) {
1864     Error(L, "expected identifier in directive");
1865     return false;
1866   }
1867   MCSymbolELF *Sym = cast<MCSymbolELF>(getContext().getOrCreateSymbol(Name));
1868 
1869   if (getLexer().isNot(AsmToken::Comma)) {
1870     Error(L, "unexpected token in directive");
1871     return false;
1872   }
1873   Lex();
1874 
1875   const MCExpr *Expr;
1876   if (getParser().parseExpression(Expr)) {
1877     Error(L, "expected expression");
1878     return false;
1879   }
1880 
1881   if (getLexer().isNot(AsmToken::EndOfStatement)) {
1882     Error(L, "unexpected token in directive");
1883     return false;
1884   }
1885 
1886   PPCTargetStreamer &TStreamer =
1887       *static_cast<PPCTargetStreamer *>(
1888            getParser().getStreamer().getTargetStreamer());
1889   TStreamer.emitLocalEntry(Sym, Expr);
1890 
1891   return false;
1892 }
1893 
1894 
1895 
1896 /// Force static initialization.
1897 extern "C" void LLVMInitializePowerPCAsmParser() {
1898   RegisterMCAsmParser<PPCAsmParser> A(ThePPC32Target);
1899   RegisterMCAsmParser<PPCAsmParser> B(ThePPC64Target);
1900   RegisterMCAsmParser<PPCAsmParser> C(ThePPC64LETarget);
1901 }
1902 
1903 #define GET_REGISTER_MATCHER
1904 #define GET_MATCHER_IMPLEMENTATION
1905 #include "PPCGenAsmMatcher.inc"
1906 
1907 // Define this matcher function after the auto-generated include so we
1908 // have the match class enum definitions.
1909 unsigned PPCAsmParser::validateTargetOperandClass(MCParsedAsmOperand &AsmOp,
1910                                                   unsigned Kind) {
1911   // If the kind is a token for a literal immediate, check if our asm
1912   // operand matches. This is for InstAliases which have a fixed-value
1913   // immediate in the syntax.
1914   int64_t ImmVal;
1915   switch (Kind) {
1916     case MCK_0: ImmVal = 0; break;
1917     case MCK_1: ImmVal = 1; break;
1918     case MCK_2: ImmVal = 2; break;
1919     case MCK_3: ImmVal = 3; break;
1920     case MCK_4: ImmVal = 4; break;
1921     case MCK_5: ImmVal = 5; break;
1922     case MCK_6: ImmVal = 6; break;
1923     case MCK_7: ImmVal = 7; break;
1924     default: return Match_InvalidOperand;
1925   }
1926 
1927   PPCOperand &Op = static_cast<PPCOperand &>(AsmOp);
1928   if (Op.isImm() && Op.getImm() == ImmVal)
1929     return Match_Success;
1930 
1931   return Match_InvalidOperand;
1932 }
1933 
1934 const MCExpr *
1935 PPCAsmParser::applyModifierToExpr(const MCExpr *E,
1936                                   MCSymbolRefExpr::VariantKind Variant,
1937                                   MCContext &Ctx) {
1938   switch (Variant) {
1939   case MCSymbolRefExpr::VK_PPC_LO:
1940     return PPCMCExpr::create(PPCMCExpr::VK_PPC_LO, E, false, Ctx);
1941   case MCSymbolRefExpr::VK_PPC_HI:
1942     return PPCMCExpr::create(PPCMCExpr::VK_PPC_HI, E, false, Ctx);
1943   case MCSymbolRefExpr::VK_PPC_HA:
1944     return PPCMCExpr::create(PPCMCExpr::VK_PPC_HA, E, false, Ctx);
1945   case MCSymbolRefExpr::VK_PPC_HIGHER:
1946     return PPCMCExpr::create(PPCMCExpr::VK_PPC_HIGHER, E, false, Ctx);
1947   case MCSymbolRefExpr::VK_PPC_HIGHERA:
1948     return PPCMCExpr::create(PPCMCExpr::VK_PPC_HIGHERA, E, false, Ctx);
1949   case MCSymbolRefExpr::VK_PPC_HIGHEST:
1950     return PPCMCExpr::create(PPCMCExpr::VK_PPC_HIGHEST, E, false, Ctx);
1951   case MCSymbolRefExpr::VK_PPC_HIGHESTA:
1952     return PPCMCExpr::create(PPCMCExpr::VK_PPC_HIGHESTA, E, false, Ctx);
1953   default:
1954     return nullptr;
1955   }
1956 }
1957