xref: /freebsd/contrib/llvm-project/llvm/lib/Target/VE/AsmParser/VEAsmParser.cpp (revision 19261079b74319502c6ffa1249920079f0f69a72) 
1 //===-- VEAsmParser.cpp - Parse VE assembly to MCInst instructions --------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "MCTargetDesc/VEMCExpr.h"
10 #include "MCTargetDesc/VEMCTargetDesc.h"
11 #include "TargetInfo/VETargetInfo.h"
12 #include "VE.h"
13 #include "llvm/ADT/STLExtras.h"
14 #include "llvm/ADT/SmallVector.h"
15 #include "llvm/ADT/StringRef.h"
16 #include "llvm/ADT/Twine.h"
17 #include "llvm/MC/MCContext.h"
18 #include "llvm/MC/MCExpr.h"
19 #include "llvm/MC/MCInst.h"
20 #include "llvm/MC/MCParser/MCAsmLexer.h"
21 #include "llvm/MC/MCParser/MCAsmParser.h"
22 #include "llvm/MC/MCParser/MCParsedAsmOperand.h"
23 #include "llvm/MC/MCParser/MCTargetAsmParser.h"
24 #include "llvm/MC/MCRegisterInfo.h"
25 #include "llvm/MC/MCStreamer.h"
26 #include "llvm/MC/MCSubtargetInfo.h"
27 #include "llvm/MC/MCSymbol.h"
28 #include "llvm/Support/TargetRegistry.h"
29 #include "llvm/Support/raw_ostream.h"
30 #include <algorithm>
31 #include <memory>
32 
33 using namespace llvm;
34 
35 #define DEBUG_TYPE "ve-asmparser"
36 
37 namespace {
38 
39 class VEOperand;
40 
41 class VEAsmParser : public MCTargetAsmParser {
42   MCAsmParser &Parser;
43 
44   /// @name Auto-generated Match Functions
45   /// {
46 
47 #define GET_ASSEMBLER_HEADER
48 #include "VEGenAsmMatcher.inc"
49 
50   /// }
51 
52   // public interface of the MCTargetAsmParser.
53   bool MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
54                                OperandVector &Operands, MCStreamer &Out,
55                                uint64_t &ErrorInfo,
56                                bool MatchingInlineAsm) override;
57   bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc) override;
58   int parseRegisterName(unsigned (*matchFn)(StringRef));
59   OperandMatchResultTy tryParseRegister(unsigned &RegNo, SMLoc &StartLoc,
60                                         SMLoc &EndLoc) override;
61   bool ParseInstruction(ParseInstructionInfo &Info, StringRef Name,
62                         SMLoc NameLoc, OperandVector &Operands) override;
63   bool ParseDirective(AsmToken DirectiveID) override;
64 
65   unsigned validateTargetOperandClass(MCParsedAsmOperand &Op,
66                                       unsigned Kind) override;
67 
68   // Custom parse functions for VE specific operands.
69   OperandMatchResultTy parseMEMOperand(OperandVector &Operands);
70   OperandMatchResultTy parseMEMAsOperand(OperandVector &Operands);
71   OperandMatchResultTy parseCCOpOperand(OperandVector &Operands);
72   OperandMatchResultTy parseRDOpOperand(OperandVector &Operands);
73   OperandMatchResultTy parseMImmOperand(OperandVector &Operands);
74   OperandMatchResultTy parseOperand(OperandVector &Operands, StringRef Name);
75   OperandMatchResultTy parseVEAsmOperand(std::unique_ptr<VEOperand> &Operand);
76 
77   // Helper function to parse expression with a symbol.
78   const MCExpr *extractModifierFromExpr(const MCExpr *E,
79                                         VEMCExpr::VariantKind &Variant);
80   const MCExpr *fixupVariantKind(const MCExpr *E);
81   bool parseExpression(const MCExpr *&EVal);
82 
83   // Split the mnemonic stripping conditional code and quantifiers
84   StringRef splitMnemonic(StringRef Name, SMLoc NameLoc,
85                           OperandVector *Operands);
86 
87 public:
88   VEAsmParser(const MCSubtargetInfo &sti, MCAsmParser &parser,
89               const MCInstrInfo &MII, const MCTargetOptions &Options)
90       : MCTargetAsmParser(Options, sti, MII), Parser(parser) {
91     // Initialize the set of available features.
92     setAvailableFeatures(ComputeAvailableFeatures(getSTI().getFeatureBits()));
93   }
94 };
95 
96 } // end anonymous namespace
97 
98 static const MCPhysReg I32Regs[64] = {
99     VE::SW0,  VE::SW1,  VE::SW2,  VE::SW3,  VE::SW4,  VE::SW5,  VE::SW6,
100     VE::SW7,  VE::SW8,  VE::SW9,  VE::SW10, VE::SW11, VE::SW12, VE::SW13,
101     VE::SW14, VE::SW15, VE::SW16, VE::SW17, VE::SW18, VE::SW19, VE::SW20,
102     VE::SW21, VE::SW22, VE::SW23, VE::SW24, VE::SW25, VE::SW26, VE::SW27,
103     VE::SW28, VE::SW29, VE::SW30, VE::SW31, VE::SW32, VE::SW33, VE::SW34,
104     VE::SW35, VE::SW36, VE::SW37, VE::SW38, VE::SW39, VE::SW40, VE::SW41,
105     VE::SW42, VE::SW43, VE::SW44, VE::SW45, VE::SW46, VE::SW47, VE::SW48,
106     VE::SW49, VE::SW50, VE::SW51, VE::SW52, VE::SW53, VE::SW54, VE::SW55,
107     VE::SW56, VE::SW57, VE::SW58, VE::SW59, VE::SW60, VE::SW61, VE::SW62,
108     VE::SW63};
109 
110 static const MCPhysReg F32Regs[64] = {
111     VE::SF0,  VE::SF1,  VE::SF2,  VE::SF3,  VE::SF4,  VE::SF5,  VE::SF6,
112     VE::SF7,  VE::SF8,  VE::SF9,  VE::SF10, VE::SF11, VE::SF12, VE::SF13,
113     VE::SF14, VE::SF15, VE::SF16, VE::SF17, VE::SF18, VE::SF19, VE::SF20,
114     VE::SF21, VE::SF22, VE::SF23, VE::SF24, VE::SF25, VE::SF26, VE::SF27,
115     VE::SF28, VE::SF29, VE::SF30, VE::SF31, VE::SF32, VE::SF33, VE::SF34,
116     VE::SF35, VE::SF36, VE::SF37, VE::SF38, VE::SF39, VE::SF40, VE::SF41,
117     VE::SF42, VE::SF43, VE::SF44, VE::SF45, VE::SF46, VE::SF47, VE::SF48,
118     VE::SF49, VE::SF50, VE::SF51, VE::SF52, VE::SF53, VE::SF54, VE::SF55,
119     VE::SF56, VE::SF57, VE::SF58, VE::SF59, VE::SF60, VE::SF61, VE::SF62,
120     VE::SF63};
121 
122 static const MCPhysReg F128Regs[32] = {
123     VE::Q0,  VE::Q1,  VE::Q2,  VE::Q3,  VE::Q4,  VE::Q5,  VE::Q6,  VE::Q7,
124     VE::Q8,  VE::Q9,  VE::Q10, VE::Q11, VE::Q12, VE::Q13, VE::Q14, VE::Q15,
125     VE::Q16, VE::Q17, VE::Q18, VE::Q19, VE::Q20, VE::Q21, VE::Q22, VE::Q23,
126     VE::Q24, VE::Q25, VE::Q26, VE::Q27, VE::Q28, VE::Q29, VE::Q30, VE::Q31};
127 
128 static const MCPhysReg VM512Regs[8] = {VE::VMP0, VE::VMP1, VE::VMP2, VE::VMP3,
129                                        VE::VMP4, VE::VMP5, VE::VMP6, VE::VMP7};
130 
131 static const MCPhysReg MISCRegs[31] = {
132     VE::USRCC,      VE::PSW,        VE::SAR,        VE::NoRegister,
133     VE::NoRegister, VE::NoRegister, VE::NoRegister, VE::PMMR,
134     VE::PMCR0,      VE::PMCR1,      VE::PMCR2,      VE::PMCR3,
135     VE::NoRegister, VE::NoRegister, VE::NoRegister, VE::NoRegister,
136     VE::PMC0,       VE::PMC1,       VE::PMC2,       VE::PMC3,
137     VE::PMC4,       VE::PMC5,       VE::PMC6,       VE::PMC7,
138     VE::PMC8,       VE::PMC9,       VE::PMC10,      VE::PMC11,
139     VE::PMC12,      VE::PMC13,      VE::PMC14};
140 
141 namespace {
142 
143 /// VEOperand - Instances of this class represent a parsed VE machine
144 /// instruction.
145 class VEOperand : public MCParsedAsmOperand {
146 private:
147   enum KindTy {
148     k_Token,
149     k_Register,
150     k_Immediate,
151     // SX-Aurora ASX form is disp(index, base).
152     k_MemoryRegRegImm,  // base=reg, index=reg, disp=imm
153     k_MemoryRegImmImm,  // base=reg, index=imm, disp=imm
154     k_MemoryZeroRegImm, // base=0, index=reg, disp=imm
155     k_MemoryZeroImmImm, // base=0, index=imm, disp=imm
156     // SX-Aurora AS form is disp(base).
157     k_MemoryRegImm,  // base=reg, disp=imm
158     k_MemoryZeroImm, // base=0, disp=imm
159     // Other special cases for Aurora VE
160     k_CCOp,   // condition code
161     k_RDOp,   // rounding mode
162     k_MImmOp, // Special immediate value of sequential bit stream of 0 or 1.
163   } Kind;
164 
165   SMLoc StartLoc, EndLoc;
166 
167   struct Token {
168     const char *Data;
169     unsigned Length;
170   };
171 
172   struct RegOp {
173     unsigned RegNum;
174   };
175 
176   struct ImmOp {
177     const MCExpr *Val;
178   };
179 
180   struct MemOp {
181     unsigned Base;
182     unsigned IndexReg;
183     const MCExpr *Index;
184     const MCExpr *Offset;
185   };
186 
187   struct CCOp {
188     unsigned CCVal;
189   };
190 
191   struct RDOp {
192     unsigned RDVal;
193   };
194 
195   struct MImmOp {
196     const MCExpr *Val;
197     bool M0Flag;
198   };
199 
200   union {
201     struct Token Tok;
202     struct RegOp Reg;
203     struct ImmOp Imm;
204     struct MemOp Mem;
205     struct CCOp CC;
206     struct RDOp RD;
207     struct MImmOp MImm;
208   };
209 
210 public:
211   VEOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {}
212 
213   bool isToken() const override { return Kind == k_Token; }
214   bool isReg() const override { return Kind == k_Register; }
215   bool isImm() const override { return Kind == k_Immediate; }
216   bool isMem() const override {
217     return isMEMrri() || isMEMrii() || isMEMzri() || isMEMzii() || isMEMri() ||
218            isMEMzi();
219   }
220   bool isMEMrri() const { return Kind == k_MemoryRegRegImm; }
221   bool isMEMrii() const { return Kind == k_MemoryRegImmImm; }
222   bool isMEMzri() const { return Kind == k_MemoryZeroRegImm; }
223   bool isMEMzii() const { return Kind == k_MemoryZeroImmImm; }
224   bool isMEMri() const { return Kind == k_MemoryRegImm; }
225   bool isMEMzi() const { return Kind == k_MemoryZeroImm; }
226   bool isCCOp() const { return Kind == k_CCOp; }
227   bool isRDOp() const { return Kind == k_RDOp; }
228   bool isZero() {
229     if (!isImm())
230       return false;
231 
232     // Constant case
233     if (const auto *ConstExpr = dyn_cast<MCConstantExpr>(Imm.Val)) {
234       int64_t Value = ConstExpr->getValue();
235       return Value == 0;
236     }
237     return false;
238   }
239   bool isUImm0to2() {
240     if (!isImm())
241       return false;
242 
243     // Constant case
244     if (const auto *ConstExpr = dyn_cast<MCConstantExpr>(Imm.Val)) {
245       int64_t Value = ConstExpr->getValue();
246       return Value >= 0 && Value < 3;
247     }
248     return false;
249   }
250   bool isUImm1() {
251     if (!isImm())
252       return false;
253 
254     // Constant case
255     if (const auto *ConstExpr = dyn_cast<MCConstantExpr>(Imm.Val)) {
256       int64_t Value = ConstExpr->getValue();
257       return isUInt<1>(Value);
258     }
259     return false;
260   }
261   bool isUImm2() {
262     if (!isImm())
263       return false;
264 
265     // Constant case
266     if (const auto *ConstExpr = dyn_cast<MCConstantExpr>(Imm.Val)) {
267       int64_t Value = ConstExpr->getValue();
268       return isUInt<2>(Value);
269     }
270     return false;
271   }
272   bool isUImm3() {
273     if (!isImm())
274       return false;
275 
276     // Constant case
277     if (const auto *ConstExpr = dyn_cast<MCConstantExpr>(Imm.Val)) {
278       int64_t Value = ConstExpr->getValue();
279       return isUInt<3>(Value);
280     }
281     return false;
282   }
283   bool isUImm4() {
284     if (!isImm())
285       return false;
286 
287     // Constant case
288     if (const auto *ConstExpr = dyn_cast<MCConstantExpr>(Imm.Val)) {
289       int64_t Value = ConstExpr->getValue();
290       return isUInt<4>(Value);
291     }
292     return false;
293   }
294   bool isUImm6() {
295     if (!isImm())
296       return false;
297 
298     // Constant case
299     if (const auto *ConstExpr = dyn_cast<MCConstantExpr>(Imm.Val)) {
300       int64_t Value = ConstExpr->getValue();
301       return isUInt<6>(Value);
302     }
303     return false;
304   }
305   bool isUImm7() {
306     if (!isImm())
307       return false;
308 
309     // Constant case
310     if (const auto *ConstExpr = dyn_cast<MCConstantExpr>(Imm.Val)) {
311       int64_t Value = ConstExpr->getValue();
312       return isUInt<7>(Value);
313     }
314     return false;
315   }
316   bool isSImm7() {
317     if (!isImm())
318       return false;
319 
320     // Constant case
321     if (const auto *ConstExpr = dyn_cast<MCConstantExpr>(Imm.Val)) {
322       int64_t Value = ConstExpr->getValue();
323       return isInt<7>(Value);
324     }
325     return false;
326   }
327   bool isMImm() const {
328     if (Kind != k_MImmOp)
329       return false;
330 
331     // Constant case
332     if (const auto *ConstExpr = dyn_cast<MCConstantExpr>(MImm.Val)) {
333       int64_t Value = ConstExpr->getValue();
334       return isUInt<6>(Value);
335     }
336     return false;
337   }
338 
339   StringRef getToken() const {
340     assert(Kind == k_Token && "Invalid access!");
341     return StringRef(Tok.Data, Tok.Length);
342   }
343 
344   unsigned getReg() const override {
345     assert((Kind == k_Register) && "Invalid access!");
346     return Reg.RegNum;
347   }
348 
349   const MCExpr *getImm() const {
350     assert((Kind == k_Immediate) && "Invalid access!");
351     return Imm.Val;
352   }
353 
354   unsigned getMemBase() const {
355     assert((Kind == k_MemoryRegRegImm || Kind == k_MemoryRegImmImm ||
356             Kind == k_MemoryRegImm) &&
357            "Invalid access!");
358     return Mem.Base;
359   }
360 
361   unsigned getMemIndexReg() const {
362     assert((Kind == k_MemoryRegRegImm || Kind == k_MemoryZeroRegImm) &&
363            "Invalid access!");
364     return Mem.IndexReg;
365   }
366 
367   const MCExpr *getMemIndex() const {
368     assert((Kind == k_MemoryRegImmImm || Kind == k_MemoryZeroImmImm) &&
369            "Invalid access!");
370     return Mem.Index;
371   }
372 
373   const MCExpr *getMemOffset() const {
374     assert((Kind == k_MemoryRegRegImm || Kind == k_MemoryRegImmImm ||
375             Kind == k_MemoryZeroImmImm || Kind == k_MemoryZeroRegImm ||
376             Kind == k_MemoryRegImm || Kind == k_MemoryZeroImm) &&
377            "Invalid access!");
378     return Mem.Offset;
379   }
380 
381   void setMemOffset(const MCExpr *off) {
382     assert((Kind == k_MemoryRegRegImm || Kind == k_MemoryRegImmImm ||
383             Kind == k_MemoryZeroImmImm || Kind == k_MemoryZeroRegImm ||
384             Kind == k_MemoryRegImm || Kind == k_MemoryZeroImm) &&
385            "Invalid access!");
386     Mem.Offset = off;
387   }
388 
389   unsigned getCCVal() const {
390     assert((Kind == k_CCOp) && "Invalid access!");
391     return CC.CCVal;
392   }
393 
394   unsigned getRDVal() const {
395     assert((Kind == k_RDOp) && "Invalid access!");
396     return RD.RDVal;
397   }
398 
399   const MCExpr *getMImmVal() const {
400     assert((Kind == k_MImmOp) && "Invalid access!");
401     return MImm.Val;
402   }
403   bool getM0Flag() const {
404     assert((Kind == k_MImmOp) && "Invalid access!");
405     return MImm.M0Flag;
406   }
407 
408   /// getStartLoc - Get the location of the first token of this operand.
409   SMLoc getStartLoc() const override { return StartLoc; }
410   /// getEndLoc - Get the location of the last token of this operand.
411   SMLoc getEndLoc() const override { return EndLoc; }
412 
413   void print(raw_ostream &OS) const override {
414     switch (Kind) {
415     case k_Token:
416       OS << "Token: " << getToken() << "\n";
417       break;
418     case k_Register:
419       OS << "Reg: #" << getReg() << "\n";
420       break;
421     case k_Immediate:
422       OS << "Imm: " << getImm() << "\n";
423       break;
424     case k_MemoryRegRegImm:
425       assert(getMemOffset() != nullptr);
426       OS << "Mem: #" << getMemBase() << "+#" << getMemIndexReg() << "+"
427          << *getMemOffset() << "\n";
428       break;
429     case k_MemoryRegImmImm:
430       assert(getMemIndex() != nullptr && getMemOffset() != nullptr);
431       OS << "Mem: #" << getMemBase() << "+" << *getMemIndex() << "+"
432          << *getMemOffset() << "\n";
433       break;
434     case k_MemoryZeroRegImm:
435       assert(getMemOffset() != nullptr);
436       OS << "Mem: 0+#" << getMemIndexReg() << "+" << *getMemOffset() << "\n";
437       break;
438     case k_MemoryZeroImmImm:
439       assert(getMemIndex() != nullptr && getMemOffset() != nullptr);
440       OS << "Mem: 0+" << *getMemIndex() << "+" << *getMemOffset() << "\n";
441       break;
442     case k_MemoryRegImm:
443       assert(getMemOffset() != nullptr);
444       OS << "Mem: #" << getMemBase() << "+" << *getMemOffset() << "\n";
445       break;
446     case k_MemoryZeroImm:
447       assert(getMemOffset() != nullptr);
448       OS << "Mem: 0+" << *getMemOffset() << "\n";
449       break;
450     case k_CCOp:
451       OS << "CCOp: " << getCCVal() << "\n";
452       break;
453     case k_RDOp:
454       OS << "RDOp: " << getRDVal() << "\n";
455       break;
456     case k_MImmOp:
457       OS << "MImm: (" << getMImmVal() << (getM0Flag() ? ")0" : ")1") << "\n";
458       break;
459     }
460   }
461 
462   void addRegOperands(MCInst &Inst, unsigned N) const {
463     assert(N == 1 && "Invalid number of operands!");
464     Inst.addOperand(MCOperand::createReg(getReg()));
465   }
466 
467   void addImmOperands(MCInst &Inst, unsigned N) const {
468     assert(N == 1 && "Invalid number of operands!");
469     const MCExpr *Expr = getImm();
470     addExpr(Inst, Expr);
471   }
472 
473   void addZeroOperands(MCInst &Inst, unsigned N) const {
474     addImmOperands(Inst, N);
475   }
476 
477   void addUImm0to2Operands(MCInst &Inst, unsigned N) const {
478     addImmOperands(Inst, N);
479   }
480 
481   void addUImm1Operands(MCInst &Inst, unsigned N) const {
482     addImmOperands(Inst, N);
483   }
484 
485   void addUImm2Operands(MCInst &Inst, unsigned N) const {
486     addImmOperands(Inst, N);
487   }
488 
489   void addUImm3Operands(MCInst &Inst, unsigned N) const {
490     addImmOperands(Inst, N);
491   }
492 
493   void addUImm4Operands(MCInst &Inst, unsigned N) const {
494     addImmOperands(Inst, N);
495   }
496 
497   void addUImm6Operands(MCInst &Inst, unsigned N) const {
498     addImmOperands(Inst, N);
499   }
500 
501   void addUImm7Operands(MCInst &Inst, unsigned N) const {
502     addImmOperands(Inst, N);
503   }
504 
505   void addSImm7Operands(MCInst &Inst, unsigned N) const {
506     addImmOperands(Inst, N);
507   }
508 
509   void addExpr(MCInst &Inst, const MCExpr *Expr) const {
510     // Add as immediate when possible.  Null MCExpr = 0.
511     if (!Expr)
512       Inst.addOperand(MCOperand::createImm(0));
513     else if (const auto *CE = dyn_cast<MCConstantExpr>(Expr))
514       Inst.addOperand(MCOperand::createImm(CE->getValue()));
515     else
516       Inst.addOperand(MCOperand::createExpr(Expr));
517   }
518 
519   void addMEMrriOperands(MCInst &Inst, unsigned N) const {
520     assert(N == 3 && "Invalid number of operands!");
521 
522     Inst.addOperand(MCOperand::createReg(getMemBase()));
523     Inst.addOperand(MCOperand::createReg(getMemIndexReg()));
524     addExpr(Inst, getMemOffset());
525   }
526 
527   void addMEMriiOperands(MCInst &Inst, unsigned N) const {
528     assert(N == 3 && "Invalid number of operands!");
529 
530     Inst.addOperand(MCOperand::createReg(getMemBase()));
531     addExpr(Inst, getMemIndex());
532     addExpr(Inst, getMemOffset());
533   }
534 
535   void addMEMzriOperands(MCInst &Inst, unsigned N) const {
536     assert(N == 3 && "Invalid number of operands!");
537 
538     Inst.addOperand(MCOperand::createImm(0));
539     Inst.addOperand(MCOperand::createReg(getMemIndexReg()));
540     addExpr(Inst, getMemOffset());
541   }
542 
543   void addMEMziiOperands(MCInst &Inst, unsigned N) const {
544     assert(N == 3 && "Invalid number of operands!");
545 
546     Inst.addOperand(MCOperand::createImm(0));
547     addExpr(Inst, getMemIndex());
548     addExpr(Inst, getMemOffset());
549   }
550 
551   void addMEMriOperands(MCInst &Inst, unsigned N) const {
552     assert(N == 2 && "Invalid number of operands!");
553 
554     Inst.addOperand(MCOperand::createReg(getMemBase()));
555     addExpr(Inst, getMemOffset());
556   }
557 
558   void addMEMziOperands(MCInst &Inst, unsigned N) const {
559     assert(N == 2 && "Invalid number of operands!");
560 
561     Inst.addOperand(MCOperand::createImm(0));
562     addExpr(Inst, getMemOffset());
563   }
564 
565   void addCCOpOperands(MCInst &Inst, unsigned N) const {
566     assert(N == 1 && "Invalid number of operands!");
567 
568     Inst.addOperand(MCOperand::createImm(getCCVal()));
569   }
570 
571   void addRDOpOperands(MCInst &Inst, unsigned N) const {
572     assert(N == 1 && "Invalid number of operands!");
573 
574     Inst.addOperand(MCOperand::createImm(getRDVal()));
575   }
576 
577   void addMImmOperands(MCInst &Inst, unsigned N) const {
578     assert(N == 1 && "Invalid number of operands!");
579     const auto *ConstExpr = dyn_cast<MCConstantExpr>(getMImmVal());
580     assert(ConstExpr && "Null operands!");
581     int64_t Value = ConstExpr->getValue();
582     if (getM0Flag())
583       Value += 64;
584     Inst.addOperand(MCOperand::createImm(Value));
585   }
586 
587   static std::unique_ptr<VEOperand> CreateToken(StringRef Str, SMLoc S) {
588     auto Op = std::make_unique<VEOperand>(k_Token);
589     Op->Tok.Data = Str.data();
590     Op->Tok.Length = Str.size();
591     Op->StartLoc = S;
592     Op->EndLoc = S;
593     return Op;
594   }
595 
596   static std::unique_ptr<VEOperand> CreateReg(unsigned RegNum, SMLoc S,
597                                               SMLoc E) {
598     auto Op = std::make_unique<VEOperand>(k_Register);
599     Op->Reg.RegNum = RegNum;
600     Op->StartLoc = S;
601     Op->EndLoc = E;
602     return Op;
603   }
604 
605   static std::unique_ptr<VEOperand> CreateImm(const MCExpr *Val, SMLoc S,
606                                               SMLoc E) {
607     auto Op = std::make_unique<VEOperand>(k_Immediate);
608     Op->Imm.Val = Val;
609     Op->StartLoc = S;
610     Op->EndLoc = E;
611     return Op;
612   }
613 
614   static std::unique_ptr<VEOperand> CreateCCOp(unsigned CCVal, SMLoc S,
615                                                SMLoc E) {
616     auto Op = std::make_unique<VEOperand>(k_CCOp);
617     Op->CC.CCVal = CCVal;
618     Op->StartLoc = S;
619     Op->EndLoc = E;
620     return Op;
621   }
622 
623   static std::unique_ptr<VEOperand> CreateRDOp(unsigned RDVal, SMLoc S,
624                                                SMLoc E) {
625     auto Op = std::make_unique<VEOperand>(k_RDOp);
626     Op->RD.RDVal = RDVal;
627     Op->StartLoc = S;
628     Op->EndLoc = E;
629     return Op;
630   }
631 
632   static std::unique_ptr<VEOperand> CreateMImm(const MCExpr *Val, bool Flag,
633                                                SMLoc S, SMLoc E) {
634     auto Op = std::make_unique<VEOperand>(k_MImmOp);
635     Op->MImm.Val = Val;
636     Op->MImm.M0Flag = Flag;
637     Op->StartLoc = S;
638     Op->EndLoc = E;
639     return Op;
640   }
641 
642   static bool MorphToI32Reg(VEOperand &Op) {
643     unsigned Reg = Op.getReg();
644     unsigned regIdx = Reg - VE::SX0;
645     if (regIdx > 63)
646       return false;
647     Op.Reg.RegNum = I32Regs[regIdx];
648     return true;
649   }
650 
651   static bool MorphToF32Reg(VEOperand &Op) {
652     unsigned Reg = Op.getReg();
653     unsigned regIdx = Reg - VE::SX0;
654     if (regIdx > 63)
655       return false;
656     Op.Reg.RegNum = F32Regs[regIdx];
657     return true;
658   }
659 
660   static bool MorphToF128Reg(VEOperand &Op) {
661     unsigned Reg = Op.getReg();
662     unsigned regIdx = Reg - VE::SX0;
663     if (regIdx % 2 || regIdx > 63)
664       return false;
665     Op.Reg.RegNum = F128Regs[regIdx / 2];
666     return true;
667   }
668 
669   static bool MorphToVM512Reg(VEOperand &Op) {
670     unsigned Reg = Op.getReg();
671     unsigned regIdx = Reg - VE::VM0;
672     if (regIdx % 2 || regIdx > 15)
673       return false;
674     Op.Reg.RegNum = VM512Regs[regIdx / 2];
675     return true;
676   }
677 
678   static bool MorphToMISCReg(VEOperand &Op) {
679     const auto *ConstExpr = dyn_cast<MCConstantExpr>(Op.getImm());
680     if (!ConstExpr)
681       return false;
682     unsigned regIdx = ConstExpr->getValue();
683     if (regIdx > 31 || MISCRegs[regIdx] == VE::NoRegister)
684       return false;
685     Op.Kind = k_Register;
686     Op.Reg.RegNum = MISCRegs[regIdx];
687     return true;
688   }
689 
690   static std::unique_ptr<VEOperand>
691   MorphToMEMri(unsigned Base, std::unique_ptr<VEOperand> Op) {
692     const MCExpr *Imm = Op->getImm();
693     Op->Kind = k_MemoryRegImm;
694     Op->Mem.Base = Base;
695     Op->Mem.IndexReg = 0;
696     Op->Mem.Index = nullptr;
697     Op->Mem.Offset = Imm;
698     return Op;
699   }
700 
701   static std::unique_ptr<VEOperand>
702   MorphToMEMzi(std::unique_ptr<VEOperand> Op) {
703     const MCExpr *Imm = Op->getImm();
704     Op->Kind = k_MemoryZeroImm;
705     Op->Mem.Base = 0;
706     Op->Mem.IndexReg = 0;
707     Op->Mem.Index = nullptr;
708     Op->Mem.Offset = Imm;
709     return Op;
710   }
711 
712   static std::unique_ptr<VEOperand>
713   MorphToMEMrri(unsigned Base, unsigned Index, std::unique_ptr<VEOperand> Op) {
714     const MCExpr *Imm = Op->getImm();
715     Op->Kind = k_MemoryRegRegImm;
716     Op->Mem.Base = Base;
717     Op->Mem.IndexReg = Index;
718     Op->Mem.Index = nullptr;
719     Op->Mem.Offset = Imm;
720     return Op;
721   }
722 
723   static std::unique_ptr<VEOperand>
724   MorphToMEMrii(unsigned Base, const MCExpr *Index,
725                 std::unique_ptr<VEOperand> Op) {
726     const MCExpr *Imm = Op->getImm();
727     Op->Kind = k_MemoryRegImmImm;
728     Op->Mem.Base = Base;
729     Op->Mem.IndexReg = 0;
730     Op->Mem.Index = Index;
731     Op->Mem.Offset = Imm;
732     return Op;
733   }
734 
735   static std::unique_ptr<VEOperand>
736   MorphToMEMzri(unsigned Index, std::unique_ptr<VEOperand> Op) {
737     const MCExpr *Imm = Op->getImm();
738     Op->Kind = k_MemoryZeroRegImm;
739     Op->Mem.Base = 0;
740     Op->Mem.IndexReg = Index;
741     Op->Mem.Index = nullptr;
742     Op->Mem.Offset = Imm;
743     return Op;
744   }
745 
746   static std::unique_ptr<VEOperand>
747   MorphToMEMzii(const MCExpr *Index, std::unique_ptr<VEOperand> Op) {
748     const MCExpr *Imm = Op->getImm();
749     Op->Kind = k_MemoryZeroImmImm;
750     Op->Mem.Base = 0;
751     Op->Mem.IndexReg = 0;
752     Op->Mem.Index = Index;
753     Op->Mem.Offset = Imm;
754     return Op;
755   }
756 };
757 
758 } // end anonymous namespace
759 
760 bool VEAsmParser::MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
761                                           OperandVector &Operands,
762                                           MCStreamer &Out, uint64_t &ErrorInfo,
763                                           bool MatchingInlineAsm) {
764   MCInst Inst;
765   unsigned MatchResult =
766       MatchInstructionImpl(Operands, Inst, ErrorInfo, MatchingInlineAsm);
767   switch (MatchResult) {
768   case Match_Success:
769     Inst.setLoc(IDLoc);
770     Out.emitInstruction(Inst, getSTI());
771     return false;
772 
773   case Match_MissingFeature:
774     return Error(IDLoc,
775                  "instruction requires a CPU feature not currently enabled");
776 
777   case Match_InvalidOperand: {
778     SMLoc ErrorLoc = IDLoc;
779     if (ErrorInfo != ~0ULL) {
780       if (ErrorInfo >= Operands.size())
781         return Error(IDLoc, "too few operands for instruction");
782 
783       ErrorLoc = ((VEOperand &)*Operands[ErrorInfo]).getStartLoc();
784       if (ErrorLoc == SMLoc())
785         ErrorLoc = IDLoc;
786     }
787 
788     return Error(ErrorLoc, "invalid operand for instruction");
789   }
790   case Match_MnemonicFail:
791     return Error(IDLoc, "invalid instruction mnemonic");
792   }
793   llvm_unreachable("Implement any new match types added!");
794 }
795 
796 bool VEAsmParser::ParseRegister(unsigned &RegNo, SMLoc &StartLoc,
797                                 SMLoc &EndLoc) {
798   if (tryParseRegister(RegNo, StartLoc, EndLoc) != MatchOperand_Success)
799     return Error(StartLoc, "invalid register name");
800   return false;
801 }
802 
803 /// Parses a register name using a given matching function.
804 /// Checks for lowercase or uppercase if necessary.
805 int VEAsmParser::parseRegisterName(unsigned (*matchFn)(StringRef)) {
806   StringRef Name = Parser.getTok().getString();
807 
808   int RegNum = matchFn(Name);
809 
810   // GCC supports case insensitive register names. All of the VE registers
811   // are all lower case.
812   if (RegNum == VE::NoRegister) {
813     RegNum = matchFn(Name.lower());
814   }
815 
816   return RegNum;
817 }
818 
819 /// Maps from the set of all register names to a register number.
820 /// \note Generated by TableGen.
821 static unsigned MatchRegisterName(StringRef Name);
822 
823 /// Maps from the set of all alternative registernames to a register number.
824 /// \note Generated by TableGen.
825 static unsigned MatchRegisterAltName(StringRef Name);
826 
827 OperandMatchResultTy
828 VEAsmParser::tryParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc) {
829   const AsmToken Tok = Parser.getTok();
830   StartLoc = Tok.getLoc();
831   EndLoc = Tok.getEndLoc();
832   RegNo = 0;
833   if (getLexer().getKind() != AsmToken::Percent)
834     return MatchOperand_NoMatch;
835   Parser.Lex();
836 
837   RegNo = parseRegisterName(&MatchRegisterName);
838   if (RegNo == VE::NoRegister)
839     RegNo = parseRegisterName(&MatchRegisterAltName);
840 
841   if (RegNo != VE::NoRegister) {
842     Parser.Lex();
843     return MatchOperand_Success;
844   }
845 
846   getLexer().UnLex(Tok);
847   return MatchOperand_NoMatch;
848 }
849 
850 static StringRef parseCC(StringRef Name, unsigned Prefix, unsigned Suffix,
851                          bool IntegerCC, bool OmitCC, SMLoc NameLoc,
852                          OperandVector *Operands) {
853   // Parse instructions with a conditional code. For example, 'bne' is
854   // converted into two operands 'b' and 'ne'.
855   StringRef Cond = Name.slice(Prefix, Suffix);
856   VECC::CondCode CondCode =
857       IntegerCC ? stringToVEICondCode(Cond) : stringToVEFCondCode(Cond);
858 
859   // If OmitCC is enabled, CC_AT and CC_AF is treated as a part of mnemonic.
860   if (CondCode != VECC::UNKNOWN &&
861       (!OmitCC || (CondCode != VECC::CC_AT && CondCode != VECC::CC_AF))) {
862     StringRef SuffixStr = Name.substr(Suffix);
863     // Push "b".
864     Name = Name.slice(0, Prefix);
865     Operands->push_back(VEOperand::CreateToken(Name, NameLoc));
866     // Push $cond part.
867     SMLoc CondLoc = SMLoc::getFromPointer(NameLoc.getPointer() + Prefix);
868     SMLoc SuffixLoc = SMLoc::getFromPointer(NameLoc.getPointer() + Suffix);
869     Operands->push_back(VEOperand::CreateCCOp(CondCode, CondLoc, SuffixLoc));
870     // push suffix like ".l.t"
871     if (!SuffixStr.empty())
872       Operands->push_back(VEOperand::CreateToken(SuffixStr, SuffixLoc));
873   } else {
874     Operands->push_back(VEOperand::CreateToken(Name, NameLoc));
875   }
876   return Name;
877 }
878 
879 static StringRef parseRD(StringRef Name, unsigned Prefix, SMLoc NameLoc,
880                          OperandVector *Operands) {
881   // Parse instructions with a conditional code. For example, 'cvt.w.d.sx.rz'
882   // is converted into two operands 'cvt.w.d.sx' and '.rz'.
883   StringRef RD = Name.substr(Prefix);
884   VERD::RoundingMode RoundingMode = stringToVERD(RD);
885 
886   if (RoundingMode != VERD::UNKNOWN) {
887     Name = Name.slice(0, Prefix);
888     // push 1st like `cvt.w.d.sx`
889     Operands->push_back(VEOperand::CreateToken(Name, NameLoc));
890     SMLoc SuffixLoc =
891         SMLoc::getFromPointer(NameLoc.getPointer() + (RD.data() - Name.data()));
892     SMLoc SuffixEnd =
893         SMLoc::getFromPointer(NameLoc.getPointer() + (RD.end() - Name.data()));
894     // push $round if it has rounding mode
895     Operands->push_back(
896         VEOperand::CreateRDOp(RoundingMode, SuffixLoc, SuffixEnd));
897   } else {
898     Operands->push_back(VEOperand::CreateToken(Name, NameLoc));
899   }
900   return Name;
901 }
902 
903 // Split the mnemonic into ASM operand, conditional code and instruction
904 // qualifier (half-word, byte).
905 StringRef VEAsmParser::splitMnemonic(StringRef Name, SMLoc NameLoc,
906                                      OperandVector *Operands) {
907   // Create the leading tokens for the mnemonic
908   StringRef Mnemonic = Name;
909 
910   if (Name[0] == 'b') {
911     // Match b?? or br??.
912     size_t Start = 1;
913     size_t Next = Name.find('.');
914     // Adjust position of CondCode.
915     if (Name.size() > 1 && Name[1] == 'r')
916       Start = 2;
917     // Check suffix.
918     bool ICC = true;
919     if (Next + 1 < Name.size() &&
920         (Name[Next + 1] == 'd' || Name[Next + 1] == 's'))
921       ICC = false;
922     Mnemonic = parseCC(Name, Start, Next, ICC, true, NameLoc, Operands);
923   } else if (Name.startswith("cmov.l.") || Name.startswith("cmov.w.") ||
924              Name.startswith("cmov.d.") || Name.startswith("cmov.s.")) {
925     bool ICC = Name[5] == 'l' || Name[5] == 'w';
926     Mnemonic = parseCC(Name, 7, Name.size(), ICC, false, NameLoc, Operands);
927   } else if (Name.startswith("cvt.w.d.sx") || Name.startswith("cvt.w.d.zx") ||
928              Name.startswith("cvt.w.s.sx") || Name.startswith("cvt.w.s.zx")) {
929     Mnemonic = parseRD(Name, 10, NameLoc, Operands);
930   } else if (Name.startswith("cvt.l.d")) {
931     Mnemonic = parseRD(Name, 7, NameLoc, Operands);
932   } else if (Name.startswith("vcvt.w.d.sx") || Name.startswith("vcvt.w.d.zx") ||
933              Name.startswith("vcvt.w.s.sx") || Name.startswith("vcvt.w.s.zx")) {
934     Mnemonic = parseRD(Name, 11, NameLoc, Operands);
935   } else if (Name.startswith("vcvt.l.d")) {
936     Mnemonic = parseRD(Name, 8, NameLoc, Operands);
937   } else if (Name.startswith("pvcvt.w.s.lo") ||
938              Name.startswith("pvcvt.w.s.up")) {
939     Mnemonic = parseRD(Name, 12, NameLoc, Operands);
940   } else if (Name.startswith("pvcvt.w.s")) {
941     Mnemonic = parseRD(Name, 9, NameLoc, Operands);
942   } else if (Name.startswith("vfmk.l.") || Name.startswith("vfmk.w.") ||
943              Name.startswith("vfmk.d.") || Name.startswith("vfmk.s.")) {
944     bool ICC = Name[5] == 'l' || Name[5] == 'w' ? true : false;
945     Mnemonic = parseCC(Name, 7, Name.size(), ICC, true, NameLoc, Operands);
946   } else if (Name.startswith("pvfmk.w.lo.") || Name.startswith("pvfmk.w.up.") ||
947              Name.startswith("pvfmk.s.lo.") || Name.startswith("pvfmk.s.up.")) {
948     bool ICC = Name[6] == 'l' || Name[6] == 'w' ? true : false;
949     Mnemonic = parseCC(Name, 11, Name.size(), ICC, true, NameLoc, Operands);
950   } else {
951     Operands->push_back(VEOperand::CreateToken(Mnemonic, NameLoc));
952   }
953 
954   return Mnemonic;
955 }
956 
957 static void applyMnemonicAliases(StringRef &Mnemonic,
958                                  const FeatureBitset &Features,
959                                  unsigned VariantID);
960 
961 bool VEAsmParser::ParseInstruction(ParseInstructionInfo &Info, StringRef Name,
962                                    SMLoc NameLoc, OperandVector &Operands) {
963   // If the target architecture uses MnemonicAlias, call it here to parse
964   // operands correctly.
965   applyMnemonicAliases(Name, getAvailableFeatures(), 0);
966 
967   // Split name to first token and the rest, e.g. "bgt.l.t" to "b", "gt", and
968   // ".l.t".  We treat "b" as a mnemonic, "gt" as first operand, and ".l.t"
969   // as second operand.
970   StringRef Mnemonic = splitMnemonic(Name, NameLoc, &Operands);
971 
972   if (getLexer().isNot(AsmToken::EndOfStatement)) {
973     // Read the first operand.
974     if (parseOperand(Operands, Mnemonic) != MatchOperand_Success) {
975       SMLoc Loc = getLexer().getLoc();
976       return Error(Loc, "unexpected token");
977     }
978 
979     while (getLexer().is(AsmToken::Comma)) {
980       Parser.Lex(); // Eat the comma.
981       // Parse and remember the operand.
982       if (parseOperand(Operands, Mnemonic) != MatchOperand_Success) {
983         SMLoc Loc = getLexer().getLoc();
984         return Error(Loc, "unexpected token");
985       }
986     }
987   }
988   if (getLexer().isNot(AsmToken::EndOfStatement)) {
989     SMLoc Loc = getLexer().getLoc();
990     return Error(Loc, "unexpected token");
991   }
992   Parser.Lex(); // Consume the EndOfStatement.
993   return false;
994 }
995 
996 bool VEAsmParser::ParseDirective(AsmToken DirectiveID) {
997   // Let the MC layer to handle other directives.
998   return true;
999 }
1000 
1001 /// Extract \code @lo32/@hi32/etc \endcode modifier from expression.
1002 /// Recursively scan the expression and check for VK_VE_HI32/LO32/etc
1003 /// symbol variants.  If all symbols with modifier use the same
1004 /// variant, return the corresponding VEMCExpr::VariantKind,
1005 /// and a modified expression using the default symbol variant.
1006 /// Otherwise, return NULL.
1007 const MCExpr *
1008 VEAsmParser::extractModifierFromExpr(const MCExpr *E,
1009                                      VEMCExpr::VariantKind &Variant) {
1010   MCContext &Context = getParser().getContext();
1011   Variant = VEMCExpr::VK_VE_None;
1012 
1013   switch (E->getKind()) {
1014   case MCExpr::Target:
1015   case MCExpr::Constant:
1016     return nullptr;
1017 
1018   case MCExpr::SymbolRef: {
1019     const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
1020 
1021     switch (SRE->getKind()) {
1022     case MCSymbolRefExpr::VK_None:
1023       // Use VK_VE_REFLONG to a symbol without modifiers.
1024       Variant = VEMCExpr::VK_VE_REFLONG;
1025       break;
1026     case MCSymbolRefExpr::VK_VE_HI32:
1027       Variant = VEMCExpr::VK_VE_HI32;
1028       break;
1029     case MCSymbolRefExpr::VK_VE_LO32:
1030       Variant = VEMCExpr::VK_VE_LO32;
1031       break;
1032     case MCSymbolRefExpr::VK_VE_PC_HI32:
1033       Variant = VEMCExpr::VK_VE_PC_HI32;
1034       break;
1035     case MCSymbolRefExpr::VK_VE_PC_LO32:
1036       Variant = VEMCExpr::VK_VE_PC_LO32;
1037       break;
1038     case MCSymbolRefExpr::VK_VE_GOT_HI32:
1039       Variant = VEMCExpr::VK_VE_GOT_HI32;
1040       break;
1041     case MCSymbolRefExpr::VK_VE_GOT_LO32:
1042       Variant = VEMCExpr::VK_VE_GOT_LO32;
1043       break;
1044     case MCSymbolRefExpr::VK_VE_GOTOFF_HI32:
1045       Variant = VEMCExpr::VK_VE_GOTOFF_HI32;
1046       break;
1047     case MCSymbolRefExpr::VK_VE_GOTOFF_LO32:
1048       Variant = VEMCExpr::VK_VE_GOTOFF_LO32;
1049       break;
1050     case MCSymbolRefExpr::VK_VE_PLT_HI32:
1051       Variant = VEMCExpr::VK_VE_PLT_HI32;
1052       break;
1053     case MCSymbolRefExpr::VK_VE_PLT_LO32:
1054       Variant = VEMCExpr::VK_VE_PLT_LO32;
1055       break;
1056     case MCSymbolRefExpr::VK_VE_TLS_GD_HI32:
1057       Variant = VEMCExpr::VK_VE_TLS_GD_HI32;
1058       break;
1059     case MCSymbolRefExpr::VK_VE_TLS_GD_LO32:
1060       Variant = VEMCExpr::VK_VE_TLS_GD_LO32;
1061       break;
1062     case MCSymbolRefExpr::VK_VE_TPOFF_HI32:
1063       Variant = VEMCExpr::VK_VE_TPOFF_HI32;
1064       break;
1065     case MCSymbolRefExpr::VK_VE_TPOFF_LO32:
1066       Variant = VEMCExpr::VK_VE_TPOFF_LO32;
1067       break;
1068     default:
1069       return nullptr;
1070     }
1071 
1072     return MCSymbolRefExpr::create(&SRE->getSymbol(), Context);
1073   }
1074 
1075   case MCExpr::Unary: {
1076     const MCUnaryExpr *UE = cast<MCUnaryExpr>(E);
1077     const MCExpr *Sub = extractModifierFromExpr(UE->getSubExpr(), Variant);
1078     if (!Sub)
1079       return nullptr;
1080     return MCUnaryExpr::create(UE->getOpcode(), Sub, Context);
1081   }
1082 
1083   case MCExpr::Binary: {
1084     const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
1085     VEMCExpr::VariantKind LHSVariant, RHSVariant;
1086     const MCExpr *LHS = extractModifierFromExpr(BE->getLHS(), LHSVariant);
1087     const MCExpr *RHS = extractModifierFromExpr(BE->getRHS(), RHSVariant);
1088 
1089     if (!LHS && !RHS)
1090       return nullptr;
1091 
1092     if (!LHS)
1093       LHS = BE->getLHS();
1094     if (!RHS)
1095       RHS = BE->getRHS();
1096 
1097     if (LHSVariant == VEMCExpr::VK_VE_None)
1098       Variant = RHSVariant;
1099     else if (RHSVariant == VEMCExpr::VK_VE_None)
1100       Variant = LHSVariant;
1101     else if (LHSVariant == RHSVariant)
1102       Variant = LHSVariant;
1103     else
1104       return nullptr;
1105 
1106     return MCBinaryExpr::create(BE->getOpcode(), LHS, RHS, Context);
1107   }
1108   }
1109 
1110   llvm_unreachable("Invalid expression kind!");
1111 }
1112 
1113 const MCExpr *VEAsmParser::fixupVariantKind(const MCExpr *E) {
1114   MCContext &Context = getParser().getContext();
1115 
1116   switch (E->getKind()) {
1117   case MCExpr::Target:
1118   case MCExpr::Constant:
1119   case MCExpr::SymbolRef:
1120     return E;
1121 
1122   case MCExpr::Unary: {
1123     const MCUnaryExpr *UE = cast<MCUnaryExpr>(E);
1124     const MCExpr *Sub = fixupVariantKind(UE->getSubExpr());
1125     if (Sub == UE->getSubExpr())
1126       return E;
1127     return MCUnaryExpr::create(UE->getOpcode(), Sub, Context);
1128   }
1129 
1130   case MCExpr::Binary: {
1131     const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
1132     const MCExpr *LHS = fixupVariantKind(BE->getLHS());
1133     const MCExpr *RHS = fixupVariantKind(BE->getRHS());
1134     if (LHS == BE->getLHS() && RHS == BE->getRHS())
1135       return E;
1136     return MCBinaryExpr::create(BE->getOpcode(), LHS, RHS, Context);
1137   }
1138   }
1139 
1140   llvm_unreachable("Invalid expression kind!");
1141 }
1142 
1143 /// ParseExpression.  This differs from the default "parseExpression" in that
1144 /// it handles modifiers.
1145 bool VEAsmParser::parseExpression(const MCExpr *&EVal) {
1146   // Handle \code symbol @lo32/@hi32/etc \endcode.
1147   if (getParser().parseExpression(EVal))
1148     return true;
1149 
1150   // Convert MCSymbolRefExpr with VK_* to MCExpr with VK_*.
1151   EVal = fixupVariantKind(EVal);
1152   VEMCExpr::VariantKind Variant;
1153   const MCExpr *E = extractModifierFromExpr(EVal, Variant);
1154   if (E)
1155     EVal = VEMCExpr::create(Variant, E, getParser().getContext());
1156 
1157   return false;
1158 }
1159 
1160 OperandMatchResultTy VEAsmParser::parseMEMOperand(OperandVector &Operands) {
1161   LLVM_DEBUG(dbgs() << "parseMEMOperand\n");
1162   const AsmToken &Tok = Parser.getTok();
1163   SMLoc S = Tok.getLoc();
1164   SMLoc E = Tok.getEndLoc();
1165   // Parse ASX format
1166   //   disp
1167   //   disp(, base)
1168   //   disp(index)
1169   //   disp(index, base)
1170   //   (, base)
1171   //   (index)
1172   //   (index, base)
1173 
1174   std::unique_ptr<VEOperand> Offset;
1175   switch (getLexer().getKind()) {
1176   default:
1177     return MatchOperand_NoMatch;
1178 
1179   case AsmToken::Minus:
1180   case AsmToken::Integer:
1181   case AsmToken::Dot:
1182   case AsmToken::Identifier: {
1183     const MCExpr *EVal;
1184     if (!parseExpression(EVal))
1185       Offset = VEOperand::CreateImm(EVal, S, E);
1186     else
1187       return MatchOperand_NoMatch;
1188     break;
1189   }
1190 
1191   case AsmToken::LParen:
1192     // empty disp (= 0)
1193     Offset =
1194         VEOperand::CreateImm(MCConstantExpr::create(0, getContext()), S, E);
1195     break;
1196   }
1197 
1198   switch (getLexer().getKind()) {
1199   default:
1200     return MatchOperand_ParseFail;
1201 
1202   case AsmToken::EndOfStatement:
1203     Operands.push_back(VEOperand::MorphToMEMzii(
1204         MCConstantExpr::create(0, getContext()), std::move(Offset)));
1205     return MatchOperand_Success;
1206 
1207   case AsmToken::LParen:
1208     Parser.Lex(); // Eat the (
1209     break;
1210   }
1211 
1212   const MCExpr *IndexValue = nullptr;
1213   unsigned IndexReg = 0;
1214 
1215   switch (getLexer().getKind()) {
1216   default:
1217     if (ParseRegister(IndexReg, S, E))
1218       return MatchOperand_ParseFail;
1219     break;
1220 
1221   case AsmToken::Minus:
1222   case AsmToken::Integer:
1223   case AsmToken::Dot:
1224     if (getParser().parseExpression(IndexValue, E))
1225       return MatchOperand_ParseFail;
1226     break;
1227 
1228   case AsmToken::Comma:
1229     // empty index
1230     IndexValue = MCConstantExpr::create(0, getContext());
1231     break;
1232   }
1233 
1234   switch (getLexer().getKind()) {
1235   default:
1236     return MatchOperand_ParseFail;
1237 
1238   case AsmToken::RParen:
1239     Parser.Lex(); // Eat the )
1240     Operands.push_back(
1241         IndexValue ? VEOperand::MorphToMEMzii(IndexValue, std::move(Offset))
1242                    : VEOperand::MorphToMEMzri(IndexReg, std::move(Offset)));
1243     return MatchOperand_Success;
1244 
1245   case AsmToken::Comma:
1246     Parser.Lex(); // Eat the ,
1247     break;
1248   }
1249 
1250   unsigned BaseReg = 0;
1251   if (ParseRegister(BaseReg, S, E))
1252     return MatchOperand_ParseFail;
1253 
1254   if (!Parser.getTok().is(AsmToken::RParen))
1255     return MatchOperand_ParseFail;
1256 
1257   Parser.Lex(); // Eat the )
1258   Operands.push_back(
1259       IndexValue
1260           ? VEOperand::MorphToMEMrii(BaseReg, IndexValue, std::move(Offset))
1261           : VEOperand::MorphToMEMrri(BaseReg, IndexReg, std::move(Offset)));
1262 
1263   return MatchOperand_Success;
1264 }
1265 
1266 OperandMatchResultTy VEAsmParser::parseMEMAsOperand(OperandVector &Operands) {
1267   LLVM_DEBUG(dbgs() << "parseMEMAsOperand\n");
1268   const AsmToken &Tok = Parser.getTok();
1269   SMLoc S = Tok.getLoc();
1270   SMLoc E = Tok.getEndLoc();
1271   // Parse AS format
1272   //   disp
1273   //   disp(, base)
1274   //   disp(base)
1275   //   disp()
1276   //   (, base)
1277   //   (base)
1278   //   base
1279 
1280   unsigned BaseReg = VE::NoRegister;
1281   std::unique_ptr<VEOperand> Offset;
1282   switch (getLexer().getKind()) {
1283   default:
1284     return MatchOperand_NoMatch;
1285 
1286   case AsmToken::Minus:
1287   case AsmToken::Integer:
1288   case AsmToken::Dot:
1289   case AsmToken::Identifier: {
1290     const MCExpr *EVal;
1291     if (!parseExpression(EVal))
1292       Offset = VEOperand::CreateImm(EVal, S, E);
1293     else
1294       return MatchOperand_NoMatch;
1295     break;
1296   }
1297 
1298   case AsmToken::Percent:
1299     if (ParseRegister(BaseReg, S, E))
1300       return MatchOperand_NoMatch;
1301     Offset =
1302         VEOperand::CreateImm(MCConstantExpr::create(0, getContext()), S, E);
1303     break;
1304 
1305   case AsmToken::LParen:
1306     // empty disp (= 0)
1307     Offset =
1308         VEOperand::CreateImm(MCConstantExpr::create(0, getContext()), S, E);
1309     break;
1310   }
1311 
1312   switch (getLexer().getKind()) {
1313   default:
1314     return MatchOperand_ParseFail;
1315 
1316   case AsmToken::EndOfStatement:
1317   case AsmToken::Comma:
1318     Operands.push_back(BaseReg != VE::NoRegister
1319                            ? VEOperand::MorphToMEMri(BaseReg, std::move(Offset))
1320                            : VEOperand::MorphToMEMzi(std::move(Offset)));
1321     return MatchOperand_Success;
1322 
1323   case AsmToken::LParen:
1324     if (BaseReg != VE::NoRegister)
1325       return MatchOperand_ParseFail;
1326     Parser.Lex(); // Eat the (
1327     break;
1328   }
1329 
1330   switch (getLexer().getKind()) {
1331   default:
1332     if (ParseRegister(BaseReg, S, E))
1333       return MatchOperand_ParseFail;
1334     break;
1335 
1336   case AsmToken::Comma:
1337     Parser.Lex(); // Eat the ,
1338     if (ParseRegister(BaseReg, S, E))
1339       return MatchOperand_ParseFail;
1340     break;
1341 
1342   case AsmToken::RParen:
1343     break;
1344   }
1345 
1346   if (!Parser.getTok().is(AsmToken::RParen))
1347     return MatchOperand_ParseFail;
1348 
1349   Parser.Lex(); // Eat the )
1350   Operands.push_back(BaseReg != VE::NoRegister
1351                          ? VEOperand::MorphToMEMri(BaseReg, std::move(Offset))
1352                          : VEOperand::MorphToMEMzi(std::move(Offset)));
1353 
1354   return MatchOperand_Success;
1355 }
1356 
1357 OperandMatchResultTy VEAsmParser::parseMImmOperand(OperandVector &Operands) {
1358   LLVM_DEBUG(dbgs() << "parseMImmOperand\n");
1359 
1360   // Parsing "(" + number + ")0/1"
1361   const AsmToken Tok1 = Parser.getTok();
1362   if (!Tok1.is(AsmToken::LParen))
1363     return MatchOperand_NoMatch;
1364 
1365   Parser.Lex(); // Eat the '('.
1366 
1367   const AsmToken Tok2 = Parser.getTok();
1368   SMLoc E;
1369   const MCExpr *EVal;
1370   if (!Tok2.is(AsmToken::Integer) || getParser().parseExpression(EVal, E)) {
1371     getLexer().UnLex(Tok1);
1372     return MatchOperand_NoMatch;
1373   }
1374 
1375   const AsmToken Tok3 = Parser.getTok();
1376   if (!Tok3.is(AsmToken::RParen)) {
1377     getLexer().UnLex(Tok2);
1378     getLexer().UnLex(Tok1);
1379     return MatchOperand_NoMatch;
1380   }
1381   Parser.Lex(); // Eat the ')'.
1382 
1383   const AsmToken &Tok4 = Parser.getTok();
1384   StringRef Suffix = Tok4.getString();
1385   if (Suffix != "1" && Suffix != "0") {
1386     getLexer().UnLex(Tok3);
1387     getLexer().UnLex(Tok2);
1388     getLexer().UnLex(Tok1);
1389     return MatchOperand_NoMatch;
1390   }
1391   Parser.Lex(); // Eat the value.
1392   SMLoc EndLoc = SMLoc::getFromPointer(Suffix.end());
1393   Operands.push_back(
1394       VEOperand::CreateMImm(EVal, Suffix == "0", Tok1.getLoc(), EndLoc));
1395   return MatchOperand_Success;
1396 }
1397 
1398 OperandMatchResultTy VEAsmParser::parseOperand(OperandVector &Operands,
1399                                                StringRef Mnemonic) {
1400   LLVM_DEBUG(dbgs() << "parseOperand\n");
1401   OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
1402 
1403   // If there wasn't a custom match, try the generic matcher below. Otherwise,
1404   // there was a match, but an error occurred, in which case, just return that
1405   // the operand parsing failed.
1406   if (ResTy == MatchOperand_Success || ResTy == MatchOperand_ParseFail)
1407     return ResTy;
1408 
1409   switch (getLexer().getKind()) {
1410   case AsmToken::LParen: {
1411     // Parsing "(" + %vreg + ", " + %vreg + ")"
1412     const AsmToken Tok1 = Parser.getTok();
1413     Parser.Lex(); // Eat the '('.
1414 
1415     unsigned RegNo1;
1416     SMLoc S1, E1;
1417     if (tryParseRegister(RegNo1, S1, E1) != MatchOperand_Success) {
1418       getLexer().UnLex(Tok1);
1419       return MatchOperand_NoMatch;
1420     }
1421 
1422     if (!Parser.getTok().is(AsmToken::Comma))
1423       return MatchOperand_ParseFail;
1424     Parser.Lex(); // Eat the ','.
1425 
1426     unsigned RegNo2;
1427     SMLoc S2, E2;
1428     if (tryParseRegister(RegNo2, S2, E2) != MatchOperand_Success)
1429       return MatchOperand_ParseFail;
1430 
1431     if (!Parser.getTok().is(AsmToken::RParen))
1432       return MatchOperand_ParseFail;
1433 
1434     Operands.push_back(VEOperand::CreateToken(Tok1.getString(), Tok1.getLoc()));
1435     Operands.push_back(VEOperand::CreateReg(RegNo1, S1, E1));
1436     Operands.push_back(VEOperand::CreateReg(RegNo2, S2, E2));
1437     Operands.push_back(VEOperand::CreateToken(Parser.getTok().getString(),
1438                                               Parser.getTok().getLoc()));
1439     Parser.Lex(); // Eat the ')'.
1440     break;
1441   }
1442   default: {
1443     std::unique_ptr<VEOperand> Op;
1444     ResTy = parseVEAsmOperand(Op);
1445     if (ResTy != MatchOperand_Success || !Op)
1446       return MatchOperand_ParseFail;
1447 
1448     // Push the parsed operand into the list of operands
1449     Operands.push_back(std::move(Op));
1450 
1451     if (!Parser.getTok().is(AsmToken::LParen))
1452       break;
1453 
1454     // Parsing %vec-reg + "(" + %sclar-reg/number + ")"
1455     std::unique_ptr<VEOperand> Op1 = VEOperand::CreateToken(
1456         Parser.getTok().getString(), Parser.getTok().getLoc());
1457     Parser.Lex(); // Eat the '('.
1458 
1459     std::unique_ptr<VEOperand> Op2;
1460     ResTy = parseVEAsmOperand(Op2);
1461     if (ResTy != MatchOperand_Success || !Op2)
1462       return MatchOperand_ParseFail;
1463 
1464     if (!Parser.getTok().is(AsmToken::RParen))
1465       return MatchOperand_ParseFail;
1466 
1467     Operands.push_back(std::move(Op1));
1468     Operands.push_back(std::move(Op2));
1469     Operands.push_back(VEOperand::CreateToken(Parser.getTok().getString(),
1470                                               Parser.getTok().getLoc()));
1471     Parser.Lex(); // Eat the ')'.
1472     break;
1473   }
1474   }
1475 
1476   return MatchOperand_Success;
1477 }
1478 
1479 OperandMatchResultTy
1480 VEAsmParser::parseVEAsmOperand(std::unique_ptr<VEOperand> &Op) {
1481   LLVM_DEBUG(dbgs() << "parseVEAsmOperand\n");
1482   SMLoc S = Parser.getTok().getLoc();
1483   SMLoc E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
1484   const MCExpr *EVal;
1485 
1486   Op = nullptr;
1487   switch (getLexer().getKind()) {
1488   default:
1489     break;
1490 
1491   case AsmToken::Percent:
1492     unsigned RegNo;
1493     if (tryParseRegister(RegNo, S, E) == MatchOperand_Success)
1494       Op = VEOperand::CreateReg(RegNo, S, E);
1495     break;
1496 
1497   case AsmToken::Minus:
1498   case AsmToken::Integer:
1499   case AsmToken::Dot:
1500   case AsmToken::Identifier:
1501     if (!parseExpression(EVal))
1502       Op = VEOperand::CreateImm(EVal, S, E);
1503     break;
1504   }
1505   return (Op) ? MatchOperand_Success : MatchOperand_ParseFail;
1506 }
1507 
1508 // Force static initialization.
1509 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeVEAsmParser() {
1510   RegisterMCAsmParser<VEAsmParser> A(getTheVETarget());
1511 }
1512 
1513 #define GET_REGISTER_MATCHER
1514 #define GET_MATCHER_IMPLEMENTATION
1515 #include "VEGenAsmMatcher.inc"
1516 
1517 unsigned VEAsmParser::validateTargetOperandClass(MCParsedAsmOperand &GOp,
1518                                                  unsigned Kind) {
1519   VEOperand &Op = (VEOperand &)GOp;
1520 
1521   // VE uses identical register name for all registers like both
1522   // F32 and I32 uses "%s23".  Need to convert the name of them
1523   // for validation.
1524   switch (Kind) {
1525   default:
1526     break;
1527   case MCK_F32:
1528     if (Op.isReg() && VEOperand::MorphToF32Reg(Op))
1529       return MCTargetAsmParser::Match_Success;
1530     break;
1531   case MCK_I32:
1532     if (Op.isReg() && VEOperand::MorphToI32Reg(Op))
1533       return MCTargetAsmParser::Match_Success;
1534     break;
1535   case MCK_F128:
1536     if (Op.isReg() && VEOperand::MorphToF128Reg(Op))
1537       return MCTargetAsmParser::Match_Success;
1538     break;
1539   case MCK_VM512:
1540     if (Op.isReg() && VEOperand::MorphToVM512Reg(Op))
1541       return MCTargetAsmParser::Match_Success;
1542     break;
1543   case MCK_MISC:
1544     if (Op.isImm() && VEOperand::MorphToMISCReg(Op))
1545       return MCTargetAsmParser::Match_Success;
1546     break;
1547   }
1548   return Match_InvalidOperand;
1549 }
1550