1 //===-- ARMAsmParser.cpp - Parse ARM assembly to MCInst instructions ------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "MCTargetDesc/ARMBaseInfo.h"
11 #include "MCTargetDesc/ARMAddressingModes.h"
12 #include "MCTargetDesc/ARMMCExpr.h"
13 #include "llvm/MC/MCParser/MCAsmLexer.h"
14 #include "llvm/MC/MCParser/MCAsmParser.h"
15 #include "llvm/MC/MCParser/MCParsedAsmOperand.h"
16 #include "llvm/MC/MCAsmInfo.h"
17 #include "llvm/MC/MCContext.h"
18 #include "llvm/MC/MCStreamer.h"
19 #include "llvm/MC/MCExpr.h"
20 #include "llvm/MC/MCInst.h"
21 #include "llvm/MC/MCInstrDesc.h"
22 #include "llvm/MC/MCRegisterInfo.h"
23 #include "llvm/MC/MCSubtargetInfo.h"
24 #include "llvm/MC/MCTargetAsmParser.h"
25 #include "llvm/Support/SourceMgr.h"
26 #include "llvm/Support/TargetRegistry.h"
27 #include "llvm/Support/raw_ostream.h"
28 #include "llvm/ADT/BitVector.h"
29 #include "llvm/ADT/OwningPtr.h"
30 #include "llvm/ADT/STLExtras.h"
31 #include "llvm/ADT/SmallVector.h"
32 #include "llvm/ADT/StringExtras.h"
33 #include "llvm/ADT/StringSwitch.h"
34 #include "llvm/ADT/Twine.h"
42 class ARMAsmParser : public MCTargetAsmParser {
46 MCAsmParser &getParser() const { return Parser; }
47 MCAsmLexer &getLexer() const { return Parser.getLexer(); }
49 void Warning(SMLoc L, const Twine &Msg) { Parser.Warning(L, Msg); }
50 bool Error(SMLoc L, const Twine &Msg) { return Parser.Error(L, Msg); }
52 int tryParseRegister();
53 bool tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &);
54 int tryParseShiftRegister(SmallVectorImpl<MCParsedAsmOperand*> &);
55 bool parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &);
56 bool parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &);
57 bool parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &, StringRef Mnemonic);
58 bool parsePrefix(ARMMCExpr::VariantKind &RefKind);
59 const MCExpr *applyPrefixToExpr(const MCExpr *E,
60 MCSymbolRefExpr::VariantKind Variant);
63 bool parseMemRegOffsetShift(ARM_AM::ShiftOpc &ShiftType,
64 unsigned &ShiftAmount);
65 bool parseDirectiveWord(unsigned Size, SMLoc L);
66 bool parseDirectiveThumb(SMLoc L);
67 bool parseDirectiveThumbFunc(SMLoc L);
68 bool parseDirectiveCode(SMLoc L);
69 bool parseDirectiveSyntax(SMLoc L);
71 StringRef splitMnemonic(StringRef Mnemonic, unsigned &PredicationCode,
72 bool &CarrySetting, unsigned &ProcessorIMod);
73 void getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
74 bool &CanAcceptPredicationCode);
76 bool isThumb() const {
77 // FIXME: Can tablegen auto-generate this?
78 return (STI.getFeatureBits() & ARM::ModeThumb) != 0;
80 bool isThumbOne() const {
81 return isThumb() && (STI.getFeatureBits() & ARM::FeatureThumb2) == 0;
83 bool isThumbTwo() const {
84 return isThumb() && (STI.getFeatureBits() & ARM::FeatureThumb2);
86 bool hasV6Ops() const {
87 return STI.getFeatureBits() & ARM::HasV6Ops;
90 unsigned FB = ComputeAvailableFeatures(STI.ToggleFeature(ARM::ModeThumb));
91 setAvailableFeatures(FB);
94 /// @name Auto-generated Match Functions
97 #define GET_ASSEMBLER_HEADER
98 #include "ARMGenAsmMatcher.inc"
102 OperandMatchResultTy parseCoprocNumOperand(
103 SmallVectorImpl<MCParsedAsmOperand*>&);
104 OperandMatchResultTy parseCoprocRegOperand(
105 SmallVectorImpl<MCParsedAsmOperand*>&);
106 OperandMatchResultTy parseMemBarrierOptOperand(
107 SmallVectorImpl<MCParsedAsmOperand*>&);
108 OperandMatchResultTy parseProcIFlagsOperand(
109 SmallVectorImpl<MCParsedAsmOperand*>&);
110 OperandMatchResultTy parseMSRMaskOperand(
111 SmallVectorImpl<MCParsedAsmOperand*>&);
112 OperandMatchResultTy parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &O,
113 StringRef Op, int Low, int High);
114 OperandMatchResultTy parsePKHLSLImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
115 return parsePKHImm(O, "lsl", 0, 31);
117 OperandMatchResultTy parsePKHASRImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
118 return parsePKHImm(O, "asr", 1, 32);
120 OperandMatchResultTy parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*>&);
121 OperandMatchResultTy parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*>&);
122 OperandMatchResultTy parseRotImm(SmallVectorImpl<MCParsedAsmOperand*>&);
123 OperandMatchResultTy parseBitfield(SmallVectorImpl<MCParsedAsmOperand*>&);
124 OperandMatchResultTy parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*>&);
125 OperandMatchResultTy parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*>&);
127 // Asm Match Converter Methods
128 bool cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
129 const SmallVectorImpl<MCParsedAsmOperand*> &);
130 bool cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
131 const SmallVectorImpl<MCParsedAsmOperand*> &);
132 bool cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
133 const SmallVectorImpl<MCParsedAsmOperand*> &);
134 bool cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
135 const SmallVectorImpl<MCParsedAsmOperand*> &);
136 bool cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
137 const SmallVectorImpl<MCParsedAsmOperand*> &);
138 bool cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
139 const SmallVectorImpl<MCParsedAsmOperand*> &);
140 bool cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
141 const SmallVectorImpl<MCParsedAsmOperand*> &);
142 bool cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
143 const SmallVectorImpl<MCParsedAsmOperand*> &);
144 bool cvtLdrdPre(MCInst &Inst, unsigned Opcode,
145 const SmallVectorImpl<MCParsedAsmOperand*> &);
146 bool cvtStrdPre(MCInst &Inst, unsigned Opcode,
147 const SmallVectorImpl<MCParsedAsmOperand*> &);
148 bool cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
149 const SmallVectorImpl<MCParsedAsmOperand*> &);
150 bool cvtThumbMultiply(MCInst &Inst, unsigned Opcode,
151 const SmallVectorImpl<MCParsedAsmOperand*> &);
153 bool validateInstruction(MCInst &Inst,
154 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
155 void processInstruction(MCInst &Inst,
156 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
157 bool shouldOmitCCOutOperand(StringRef Mnemonic,
158 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
161 enum ARMMatchResultTy {
162 Match_RequiresITBlock = FIRST_TARGET_MATCH_RESULT_TY,
167 ARMAsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser)
168 : MCTargetAsmParser(), STI(_STI), Parser(_Parser) {
169 MCAsmParserExtension::Initialize(_Parser);
171 // Initialize the set of available features.
172 setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
175 // Implementation of the MCTargetAsmParser interface:
176 bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc);
177 bool ParseInstruction(StringRef Name, SMLoc NameLoc,
178 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
179 bool ParseDirective(AsmToken DirectiveID);
181 unsigned checkTargetMatchPredicate(MCInst &Inst);
183 bool MatchAndEmitInstruction(SMLoc IDLoc,
184 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
187 } // end anonymous namespace
191 /// ARMOperand - Instances of this class represent a parsed ARM machine
193 class ARMOperand : public MCParsedAsmOperand {
217 SMLoc StartLoc, EndLoc;
218 SmallVector<unsigned, 8> Registers;
222 ARMCC::CondCodes Val;
234 ARM_PROC::IFlags Val;
254 /// Combined record for all forms of ARM address expressions.
257 // Offset is in OffsetReg or OffsetImm. If both are zero, no offset
259 const MCConstantExpr *OffsetImm; // Offset immediate value
260 unsigned OffsetRegNum; // Offset register num, when OffsetImm == NULL
261 ARM_AM::ShiftOpc ShiftType; // Shift type for OffsetReg
262 unsigned ShiftImm; // shift for OffsetReg.
263 unsigned isNegative : 1; // Negated OffsetReg? (~'U' bit)
269 ARM_AM::ShiftOpc ShiftTy;
278 ARM_AM::ShiftOpc ShiftTy;
284 ARM_AM::ShiftOpc ShiftTy;
297 ARMOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {}
299 ARMOperand(const ARMOperand &o) : MCParsedAsmOperand() {
301 StartLoc = o.StartLoc;
315 case DPRRegisterList:
316 case SPRRegisterList:
317 Registers = o.Registers;
332 case PostIndexRegister:
333 PostIdxReg = o.PostIdxReg;
341 case ShifterImmediate:
342 ShifterImm = o.ShifterImm;
344 case ShiftedRegister:
345 RegShiftedReg = o.RegShiftedReg;
347 case ShiftedImmediate:
348 RegShiftedImm = o.RegShiftedImm;
350 case RotateImmediate:
353 case BitfieldDescriptor:
354 Bitfield = o.Bitfield;
359 /// getStartLoc - Get the location of the first token of this operand.
360 SMLoc getStartLoc() const { return StartLoc; }
361 /// getEndLoc - Get the location of the last token of this operand.
362 SMLoc getEndLoc() const { return EndLoc; }
364 ARMCC::CondCodes getCondCode() const {
365 assert(Kind == CondCode && "Invalid access!");
369 unsigned getCoproc() const {
370 assert((Kind == CoprocNum || Kind == CoprocReg) && "Invalid access!");
374 StringRef getToken() const {
375 assert(Kind == Token && "Invalid access!");
376 return StringRef(Tok.Data, Tok.Length);
379 unsigned getReg() const {
380 assert((Kind == Register || Kind == CCOut) && "Invalid access!");
384 const SmallVectorImpl<unsigned> &getRegList() const {
385 assert((Kind == RegisterList || Kind == DPRRegisterList ||
386 Kind == SPRRegisterList) && "Invalid access!");
390 const MCExpr *getImm() const {
391 assert(Kind == Immediate && "Invalid access!");
395 ARM_MB::MemBOpt getMemBarrierOpt() const {
396 assert(Kind == MemBarrierOpt && "Invalid access!");
400 ARM_PROC::IFlags getProcIFlags() const {
401 assert(Kind == ProcIFlags && "Invalid access!");
405 unsigned getMSRMask() const {
406 assert(Kind == MSRMask && "Invalid access!");
410 bool isCoprocNum() const { return Kind == CoprocNum; }
411 bool isCoprocReg() const { return Kind == CoprocReg; }
412 bool isCondCode() const { return Kind == CondCode; }
413 bool isCCOut() const { return Kind == CCOut; }
414 bool isImm() const { return Kind == Immediate; }
415 bool isImm0_255() const {
416 if (Kind != Immediate)
418 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
419 if (!CE) return false;
420 int64_t Value = CE->getValue();
421 return Value >= 0 && Value < 256;
423 bool isImm0_7() const {
424 if (Kind != Immediate)
426 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
427 if (!CE) return false;
428 int64_t Value = CE->getValue();
429 return Value >= 0 && Value < 8;
431 bool isImm0_15() const {
432 if (Kind != Immediate)
434 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
435 if (!CE) return false;
436 int64_t Value = CE->getValue();
437 return Value >= 0 && Value < 16;
439 bool isImm0_31() const {
440 if (Kind != Immediate)
442 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
443 if (!CE) return false;
444 int64_t Value = CE->getValue();
445 return Value >= 0 && Value < 32;
447 bool isImm1_16() const {
448 if (Kind != Immediate)
450 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
451 if (!CE) return false;
452 int64_t Value = CE->getValue();
453 return Value > 0 && Value < 17;
455 bool isImm1_32() const {
456 if (Kind != Immediate)
458 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
459 if (!CE) return false;
460 int64_t Value = CE->getValue();
461 return Value > 0 && Value < 33;
463 bool isImm0_65535() const {
464 if (Kind != Immediate)
466 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
467 if (!CE) return false;
468 int64_t Value = CE->getValue();
469 return Value >= 0 && Value < 65536;
471 bool isImm0_65535Expr() const {
472 if (Kind != Immediate)
474 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
475 // If it's not a constant expression, it'll generate a fixup and be
477 if (!CE) return true;
478 int64_t Value = CE->getValue();
479 return Value >= 0 && Value < 65536;
481 bool isImm24bit() const {
482 if (Kind != Immediate)
484 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
485 if (!CE) return false;
486 int64_t Value = CE->getValue();
487 return Value >= 0 && Value <= 0xffffff;
489 bool isImmThumbSR() const {
490 if (Kind != Immediate)
492 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
493 if (!CE) return false;
494 int64_t Value = CE->getValue();
495 return Value > 0 && Value < 33;
497 bool isPKHLSLImm() const {
498 if (Kind != Immediate)
500 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
501 if (!CE) return false;
502 int64_t Value = CE->getValue();
503 return Value >= 0 && Value < 32;
505 bool isPKHASRImm() const {
506 if (Kind != Immediate)
508 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
509 if (!CE) return false;
510 int64_t Value = CE->getValue();
511 return Value > 0 && Value <= 32;
513 bool isARMSOImm() const {
514 if (Kind != Immediate)
516 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
517 if (!CE) return false;
518 int64_t Value = CE->getValue();
519 return ARM_AM::getSOImmVal(Value) != -1;
521 bool isT2SOImm() const {
522 if (Kind != Immediate)
524 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
525 if (!CE) return false;
526 int64_t Value = CE->getValue();
527 return ARM_AM::getT2SOImmVal(Value) != -1;
529 bool isSetEndImm() const {
530 if (Kind != Immediate)
532 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
533 if (!CE) return false;
534 int64_t Value = CE->getValue();
535 return Value == 1 || Value == 0;
537 bool isReg() const { return Kind == Register; }
538 bool isRegList() const { return Kind == RegisterList; }
539 bool isDPRRegList() const { return Kind == DPRRegisterList; }
540 bool isSPRRegList() const { return Kind == SPRRegisterList; }
541 bool isToken() const { return Kind == Token; }
542 bool isMemBarrierOpt() const { return Kind == MemBarrierOpt; }
543 bool isMemory() const { return Kind == Memory; }
544 bool isShifterImm() const { return Kind == ShifterImmediate; }
545 bool isRegShiftedReg() const { return Kind == ShiftedRegister; }
546 bool isRegShiftedImm() const { return Kind == ShiftedImmediate; }
547 bool isRotImm() const { return Kind == RotateImmediate; }
548 bool isBitfield() const { return Kind == BitfieldDescriptor; }
549 bool isPostIdxRegShifted() const { return Kind == PostIndexRegister; }
550 bool isPostIdxReg() const {
551 return Kind == PostIndexRegister && PostIdxReg.ShiftTy == ARM_AM::no_shift;
553 bool isMemNoOffset() const {
556 // No offset of any kind.
557 return Mem.OffsetRegNum == 0 && Mem.OffsetImm == 0;
559 bool isAddrMode2() const {
562 // Check for register offset.
563 if (Mem.OffsetRegNum) return true;
564 // Immediate offset in range [-4095, 4095].
565 if (!Mem.OffsetImm) return true;
566 int64_t Val = Mem.OffsetImm->getValue();
567 return Val > -4096 && Val < 4096;
569 bool isAM2OffsetImm() const {
570 if (Kind != Immediate)
572 // Immediate offset in range [-4095, 4095].
573 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
574 if (!CE) return false;
575 int64_t Val = CE->getValue();
576 return Val > -4096 && Val < 4096;
578 bool isAddrMode3() const {
581 // No shifts are legal for AM3.
582 if (Mem.ShiftType != ARM_AM::no_shift) return false;
583 // Check for register offset.
584 if (Mem.OffsetRegNum) return true;
585 // Immediate offset in range [-255, 255].
586 if (!Mem.OffsetImm) return true;
587 int64_t Val = Mem.OffsetImm->getValue();
588 return Val > -256 && Val < 256;
590 bool isAM3Offset() const {
591 if (Kind != Immediate && Kind != PostIndexRegister)
593 if (Kind == PostIndexRegister)
594 return PostIdxReg.ShiftTy == ARM_AM::no_shift;
595 // Immediate offset in range [-255, 255].
596 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
597 if (!CE) return false;
598 int64_t Val = CE->getValue();
599 // Special case, #-0 is INT32_MIN.
600 return (Val > -256 && Val < 256) || Val == INT32_MIN;
602 bool isAddrMode5() const {
605 // Check for register offset.
606 if (Mem.OffsetRegNum) return false;
607 // Immediate offset in range [-1020, 1020] and a multiple of 4.
608 if (!Mem.OffsetImm) return true;
609 int64_t Val = Mem.OffsetImm->getValue();
610 return Val >= -1020 && Val <= 1020 && ((Val & 3) == 0);
612 bool isMemRegOffset() const {
613 if (Kind != Memory || !Mem.OffsetRegNum)
617 bool isMemThumbRR() const {
618 // Thumb reg+reg addressing is simple. Just two registers, a base and
619 // an offset. No shifts, negations or any other complicating factors.
620 if (Kind != Memory || !Mem.OffsetRegNum || Mem.isNegative ||
621 Mem.ShiftType != ARM_AM::no_shift)
623 return isARMLowRegister(Mem.BaseRegNum) &&
624 (!Mem.OffsetRegNum || isARMLowRegister(Mem.OffsetRegNum));
626 bool isMemThumbRIs4() const {
627 if (Kind != Memory || Mem.OffsetRegNum != 0 ||
628 !isARMLowRegister(Mem.BaseRegNum))
630 // Immediate offset, multiple of 4 in range [0, 124].
631 if (!Mem.OffsetImm) return true;
632 int64_t Val = Mem.OffsetImm->getValue();
633 return Val >= 0 && Val <= 124 && (Val % 4) == 0;
635 bool isMemThumbRIs2() const {
636 if (Kind != Memory || Mem.OffsetRegNum != 0 ||
637 !isARMLowRegister(Mem.BaseRegNum))
639 // Immediate offset, multiple of 4 in range [0, 62].
640 if (!Mem.OffsetImm) return true;
641 int64_t Val = Mem.OffsetImm->getValue();
642 return Val >= 0 && Val <= 62 && (Val % 2) == 0;
644 bool isMemThumbRIs1() const {
645 if (Kind != Memory || Mem.OffsetRegNum != 0 ||
646 !isARMLowRegister(Mem.BaseRegNum))
648 // Immediate offset in range [0, 31].
649 if (!Mem.OffsetImm) return true;
650 int64_t Val = Mem.OffsetImm->getValue();
651 return Val >= 0 && Val <= 31;
653 bool isMemThumbSPI() const {
654 if (Kind != Memory || Mem.OffsetRegNum != 0 || Mem.BaseRegNum != ARM::SP)
656 // Immediate offset, multiple of 4 in range [0, 1020].
657 if (!Mem.OffsetImm) return true;
658 int64_t Val = Mem.OffsetImm->getValue();
659 return Val >= 0 && Val <= 1020 && (Val % 4) == 0;
661 bool isMemImm8Offset() const {
662 if (Kind != Memory || Mem.OffsetRegNum != 0)
664 // Immediate offset in range [-255, 255].
665 if (!Mem.OffsetImm) return true;
666 int64_t Val = Mem.OffsetImm->getValue();
667 return Val > -256 && Val < 256;
669 bool isMemImm12Offset() const {
670 // If we have an immediate that's not a constant, treat it as a label
671 // reference needing a fixup. If it is a constant, it's something else
673 if (Kind == Immediate && !isa<MCConstantExpr>(getImm()))
676 if (Kind != Memory || Mem.OffsetRegNum != 0)
678 // Immediate offset in range [-4095, 4095].
679 if (!Mem.OffsetImm) return true;
680 int64_t Val = Mem.OffsetImm->getValue();
681 return Val > -4096 && Val < 4096;
683 bool isPostIdxImm8() const {
684 if (Kind != Immediate)
686 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
687 if (!CE) return false;
688 int64_t Val = CE->getValue();
689 return Val > -256 && Val < 256;
692 bool isMSRMask() const { return Kind == MSRMask; }
693 bool isProcIFlags() const { return Kind == ProcIFlags; }
695 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
696 // Add as immediates when possible. Null MCExpr = 0.
698 Inst.addOperand(MCOperand::CreateImm(0));
699 else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
700 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
702 Inst.addOperand(MCOperand::CreateExpr(Expr));
705 void addCondCodeOperands(MCInst &Inst, unsigned N) const {
706 assert(N == 2 && "Invalid number of operands!");
707 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
708 unsigned RegNum = getCondCode() == ARMCC::AL ? 0: ARM::CPSR;
709 Inst.addOperand(MCOperand::CreateReg(RegNum));
712 void addCoprocNumOperands(MCInst &Inst, unsigned N) const {
713 assert(N == 1 && "Invalid number of operands!");
714 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
717 void addCoprocRegOperands(MCInst &Inst, unsigned N) const {
718 assert(N == 1 && "Invalid number of operands!");
719 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
722 void addCCOutOperands(MCInst &Inst, unsigned N) const {
723 assert(N == 1 && "Invalid number of operands!");
724 Inst.addOperand(MCOperand::CreateReg(getReg()));
727 void addRegOperands(MCInst &Inst, unsigned N) const {
728 assert(N == 1 && "Invalid number of operands!");
729 Inst.addOperand(MCOperand::CreateReg(getReg()));
732 void addRegShiftedRegOperands(MCInst &Inst, unsigned N) const {
733 assert(N == 3 && "Invalid number of operands!");
734 assert(isRegShiftedReg() && "addRegShiftedRegOperands() on non RegShiftedReg!");
735 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.SrcReg));
736 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.ShiftReg));
737 Inst.addOperand(MCOperand::CreateImm(
738 ARM_AM::getSORegOpc(RegShiftedReg.ShiftTy, RegShiftedReg.ShiftImm)));
741 void addRegShiftedImmOperands(MCInst &Inst, unsigned N) const {
742 assert(N == 2 && "Invalid number of operands!");
743 assert(isRegShiftedImm() && "addRegShiftedImmOperands() on non RegShiftedImm!");
744 Inst.addOperand(MCOperand::CreateReg(RegShiftedImm.SrcReg));
745 Inst.addOperand(MCOperand::CreateImm(
746 ARM_AM::getSORegOpc(RegShiftedImm.ShiftTy, RegShiftedImm.ShiftImm)));
750 void addShifterImmOperands(MCInst &Inst, unsigned N) const {
751 assert(N == 1 && "Invalid number of operands!");
752 Inst.addOperand(MCOperand::CreateImm((ShifterImm.isASR << 5) |
756 void addRegListOperands(MCInst &Inst, unsigned N) const {
757 assert(N == 1 && "Invalid number of operands!");
758 const SmallVectorImpl<unsigned> &RegList = getRegList();
759 for (SmallVectorImpl<unsigned>::const_iterator
760 I = RegList.begin(), E = RegList.end(); I != E; ++I)
761 Inst.addOperand(MCOperand::CreateReg(*I));
764 void addDPRRegListOperands(MCInst &Inst, unsigned N) const {
765 addRegListOperands(Inst, N);
768 void addSPRRegListOperands(MCInst &Inst, unsigned N) const {
769 addRegListOperands(Inst, N);
772 void addRotImmOperands(MCInst &Inst, unsigned N) const {
773 assert(N == 1 && "Invalid number of operands!");
774 // Encoded as val>>3. The printer handles display as 8, 16, 24.
775 Inst.addOperand(MCOperand::CreateImm(RotImm.Imm >> 3));
778 void addBitfieldOperands(MCInst &Inst, unsigned N) const {
779 assert(N == 1 && "Invalid number of operands!");
780 // Munge the lsb/width into a bitfield mask.
781 unsigned lsb = Bitfield.LSB;
782 unsigned width = Bitfield.Width;
783 // Make a 32-bit mask w/ the referenced bits clear and all other bits set.
784 uint32_t Mask = ~(((uint32_t)0xffffffff >> lsb) << (32 - width) >>
785 (32 - (lsb + width)));
786 Inst.addOperand(MCOperand::CreateImm(Mask));
789 void addImmOperands(MCInst &Inst, unsigned N) const {
790 assert(N == 1 && "Invalid number of operands!");
791 addExpr(Inst, getImm());
794 void addImm0_255Operands(MCInst &Inst, unsigned N) const {
795 assert(N == 1 && "Invalid number of operands!");
796 addExpr(Inst, getImm());
799 void addImm0_7Operands(MCInst &Inst, unsigned N) const {
800 assert(N == 1 && "Invalid number of operands!");
801 addExpr(Inst, getImm());
804 void addImm0_15Operands(MCInst &Inst, unsigned N) const {
805 assert(N == 1 && "Invalid number of operands!");
806 addExpr(Inst, getImm());
809 void addImm0_31Operands(MCInst &Inst, unsigned N) const {
810 assert(N == 1 && "Invalid number of operands!");
811 addExpr(Inst, getImm());
814 void addImm1_16Operands(MCInst &Inst, unsigned N) const {
815 assert(N == 1 && "Invalid number of operands!");
816 // The constant encodes as the immediate-1, and we store in the instruction
817 // the bits as encoded, so subtract off one here.
818 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
819 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
822 void addImm1_32Operands(MCInst &Inst, unsigned N) const {
823 assert(N == 1 && "Invalid number of operands!");
824 // The constant encodes as the immediate-1, and we store in the instruction
825 // the bits as encoded, so subtract off one here.
826 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
827 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
830 void addImm0_65535Operands(MCInst &Inst, unsigned N) const {
831 assert(N == 1 && "Invalid number of operands!");
832 addExpr(Inst, getImm());
835 void addImm0_65535ExprOperands(MCInst &Inst, unsigned N) const {
836 assert(N == 1 && "Invalid number of operands!");
837 addExpr(Inst, getImm());
840 void addImm24bitOperands(MCInst &Inst, unsigned N) const {
841 assert(N == 1 && "Invalid number of operands!");
842 addExpr(Inst, getImm());
845 void addImmThumbSROperands(MCInst &Inst, unsigned N) const {
846 assert(N == 1 && "Invalid number of operands!");
847 // The constant encodes as the immediate, except for 32, which encodes as
849 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
850 unsigned Imm = CE->getValue();
851 Inst.addOperand(MCOperand::CreateImm((Imm == 32 ? 0 : Imm)));
854 void addPKHLSLImmOperands(MCInst &Inst, unsigned N) const {
855 assert(N == 1 && "Invalid number of operands!");
856 addExpr(Inst, getImm());
859 void addPKHASRImmOperands(MCInst &Inst, unsigned N) const {
860 assert(N == 1 && "Invalid number of operands!");
861 // An ASR value of 32 encodes as 0, so that's how we want to add it to
862 // the instruction as well.
863 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
864 int Val = CE->getValue();
865 Inst.addOperand(MCOperand::CreateImm(Val == 32 ? 0 : Val));
868 void addARMSOImmOperands(MCInst &Inst, unsigned N) const {
869 assert(N == 1 && "Invalid number of operands!");
870 addExpr(Inst, getImm());
873 void addT2SOImmOperands(MCInst &Inst, unsigned N) const {
874 assert(N == 1 && "Invalid number of operands!");
875 addExpr(Inst, getImm());
878 void addSetEndImmOperands(MCInst &Inst, unsigned N) const {
879 assert(N == 1 && "Invalid number of operands!");
880 addExpr(Inst, getImm());
883 void addMemBarrierOptOperands(MCInst &Inst, unsigned N) const {
884 assert(N == 1 && "Invalid number of operands!");
885 Inst.addOperand(MCOperand::CreateImm(unsigned(getMemBarrierOpt())));
888 void addMemNoOffsetOperands(MCInst &Inst, unsigned N) const {
889 assert(N == 1 && "Invalid number of operands!");
890 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
893 void addAddrMode2Operands(MCInst &Inst, unsigned N) const {
894 assert(N == 3 && "Invalid number of operands!");
895 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
896 if (!Mem.OffsetRegNum) {
897 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
898 // Special case for #-0
899 if (Val == INT32_MIN) Val = 0;
900 if (Val < 0) Val = -Val;
901 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
903 // For register offset, we encode the shift type and negation flag
905 Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
906 Mem.ShiftImm, Mem.ShiftType);
908 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
909 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
910 Inst.addOperand(MCOperand::CreateImm(Val));
913 void addAM2OffsetImmOperands(MCInst &Inst, unsigned N) const {
914 assert(N == 2 && "Invalid number of operands!");
915 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
916 assert(CE && "non-constant AM2OffsetImm operand!");
917 int32_t Val = CE->getValue();
918 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
919 // Special case for #-0
920 if (Val == INT32_MIN) Val = 0;
921 if (Val < 0) Val = -Val;
922 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
923 Inst.addOperand(MCOperand::CreateReg(0));
924 Inst.addOperand(MCOperand::CreateImm(Val));
927 void addAddrMode3Operands(MCInst &Inst, unsigned N) const {
928 assert(N == 3 && "Invalid number of operands!");
929 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
930 if (!Mem.OffsetRegNum) {
931 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
932 // Special case for #-0
933 if (Val == INT32_MIN) Val = 0;
934 if (Val < 0) Val = -Val;
935 Val = ARM_AM::getAM3Opc(AddSub, Val);
937 // For register offset, we encode the shift type and negation flag
939 Val = ARM_AM::getAM3Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add, 0);
941 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
942 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
943 Inst.addOperand(MCOperand::CreateImm(Val));
946 void addAM3OffsetOperands(MCInst &Inst, unsigned N) const {
947 assert(N == 2 && "Invalid number of operands!");
948 if (Kind == PostIndexRegister) {
950 ARM_AM::getAM3Opc(PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub, 0);
951 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
952 Inst.addOperand(MCOperand::CreateImm(Val));
957 const MCConstantExpr *CE = static_cast<const MCConstantExpr*>(getImm());
958 int32_t Val = CE->getValue();
959 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
960 // Special case for #-0
961 if (Val == INT32_MIN) Val = 0;
962 if (Val < 0) Val = -Val;
963 Val = ARM_AM::getAM3Opc(AddSub, Val);
964 Inst.addOperand(MCOperand::CreateReg(0));
965 Inst.addOperand(MCOperand::CreateImm(Val));
968 void addAddrMode5Operands(MCInst &Inst, unsigned N) const {
969 assert(N == 2 && "Invalid number of operands!");
970 // The lower two bits are always zero and as such are not encoded.
971 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() / 4 : 0;
972 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
973 // Special case for #-0
974 if (Val == INT32_MIN) Val = 0;
975 if (Val < 0) Val = -Val;
976 Val = ARM_AM::getAM5Opc(AddSub, Val);
977 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
978 Inst.addOperand(MCOperand::CreateImm(Val));
981 void addMemImm8OffsetOperands(MCInst &Inst, unsigned N) const {
982 assert(N == 2 && "Invalid number of operands!");
983 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
984 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
985 Inst.addOperand(MCOperand::CreateImm(Val));
988 void addMemImm12OffsetOperands(MCInst &Inst, unsigned N) const {
989 assert(N == 2 && "Invalid number of operands!");
990 // If this is an immediate, it's a label reference.
991 if (Kind == Immediate) {
992 addExpr(Inst, getImm());
993 Inst.addOperand(MCOperand::CreateImm(0));
997 // Otherwise, it's a normal memory reg+offset.
998 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
999 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1000 Inst.addOperand(MCOperand::CreateImm(Val));
1003 void addMemRegOffsetOperands(MCInst &Inst, unsigned N) const {
1004 assert(N == 3 && "Invalid number of operands!");
1005 unsigned Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
1006 Mem.ShiftImm, Mem.ShiftType);
1007 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1008 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
1009 Inst.addOperand(MCOperand::CreateImm(Val));
1012 void addMemThumbRROperands(MCInst &Inst, unsigned N) const {
1013 assert(N == 2 && "Invalid number of operands!");
1014 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1015 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
1018 void addMemThumbRIs4Operands(MCInst &Inst, unsigned N) const {
1019 assert(N == 2 && "Invalid number of operands!");
1020 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 4) : 0;
1021 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1022 Inst.addOperand(MCOperand::CreateImm(Val));
1025 void addMemThumbRIs2Operands(MCInst &Inst, unsigned N) const {
1026 assert(N == 2 && "Invalid number of operands!");
1027 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 2) : 0;
1028 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1029 Inst.addOperand(MCOperand::CreateImm(Val));
1032 void addMemThumbRIs1Operands(MCInst &Inst, unsigned N) const {
1033 assert(N == 2 && "Invalid number of operands!");
1034 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue()) : 0;
1035 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1036 Inst.addOperand(MCOperand::CreateImm(Val));
1039 void addMemThumbSPIOperands(MCInst &Inst, unsigned N) const {
1040 assert(N == 2 && "Invalid number of operands!");
1041 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 4) : 0;
1042 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1043 Inst.addOperand(MCOperand::CreateImm(Val));
1046 void addPostIdxImm8Operands(MCInst &Inst, unsigned N) const {
1047 assert(N == 1 && "Invalid number of operands!");
1048 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1049 assert(CE && "non-constant post-idx-imm8 operand!");
1050 int Imm = CE->getValue();
1051 bool isAdd = Imm >= 0;
1052 Imm = (Imm < 0 ? -Imm : Imm) | (int)isAdd << 8;
1053 Inst.addOperand(MCOperand::CreateImm(Imm));
1056 void addPostIdxRegOperands(MCInst &Inst, unsigned N) const {
1057 assert(N == 2 && "Invalid number of operands!");
1058 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1059 Inst.addOperand(MCOperand::CreateImm(PostIdxReg.isAdd));
1062 void addPostIdxRegShiftedOperands(MCInst &Inst, unsigned N) const {
1063 assert(N == 2 && "Invalid number of operands!");
1064 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1065 // The sign, shift type, and shift amount are encoded in a single operand
1066 // using the AM2 encoding helpers.
1067 ARM_AM::AddrOpc opc = PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub;
1068 unsigned Imm = ARM_AM::getAM2Opc(opc, PostIdxReg.ShiftImm,
1069 PostIdxReg.ShiftTy);
1070 Inst.addOperand(MCOperand::CreateImm(Imm));
1073 void addMSRMaskOperands(MCInst &Inst, unsigned N) const {
1074 assert(N == 1 && "Invalid number of operands!");
1075 Inst.addOperand(MCOperand::CreateImm(unsigned(getMSRMask())));
1078 void addProcIFlagsOperands(MCInst &Inst, unsigned N) const {
1079 assert(N == 1 && "Invalid number of operands!");
1080 Inst.addOperand(MCOperand::CreateImm(unsigned(getProcIFlags())));
1083 virtual void print(raw_ostream &OS) const;
1085 static ARMOperand *CreateCondCode(ARMCC::CondCodes CC, SMLoc S) {
1086 ARMOperand *Op = new ARMOperand(CondCode);
1093 static ARMOperand *CreateCoprocNum(unsigned CopVal, SMLoc S) {
1094 ARMOperand *Op = new ARMOperand(CoprocNum);
1095 Op->Cop.Val = CopVal;
1101 static ARMOperand *CreateCoprocReg(unsigned CopVal, SMLoc S) {
1102 ARMOperand *Op = new ARMOperand(CoprocReg);
1103 Op->Cop.Val = CopVal;
1109 static ARMOperand *CreateCCOut(unsigned RegNum, SMLoc S) {
1110 ARMOperand *Op = new ARMOperand(CCOut);
1111 Op->Reg.RegNum = RegNum;
1117 static ARMOperand *CreateToken(StringRef Str, SMLoc S) {
1118 ARMOperand *Op = new ARMOperand(Token);
1119 Op->Tok.Data = Str.data();
1120 Op->Tok.Length = Str.size();
1126 static ARMOperand *CreateReg(unsigned RegNum, SMLoc S, SMLoc E) {
1127 ARMOperand *Op = new ARMOperand(Register);
1128 Op->Reg.RegNum = RegNum;
1134 static ARMOperand *CreateShiftedRegister(ARM_AM::ShiftOpc ShTy,
1139 ARMOperand *Op = new ARMOperand(ShiftedRegister);
1140 Op->RegShiftedReg.ShiftTy = ShTy;
1141 Op->RegShiftedReg.SrcReg = SrcReg;
1142 Op->RegShiftedReg.ShiftReg = ShiftReg;
1143 Op->RegShiftedReg.ShiftImm = ShiftImm;
1149 static ARMOperand *CreateShiftedImmediate(ARM_AM::ShiftOpc ShTy,
1153 ARMOperand *Op = new ARMOperand(ShiftedImmediate);
1154 Op->RegShiftedImm.ShiftTy = ShTy;
1155 Op->RegShiftedImm.SrcReg = SrcReg;
1156 Op->RegShiftedImm.ShiftImm = ShiftImm;
1162 static ARMOperand *CreateShifterImm(bool isASR, unsigned Imm,
1164 ARMOperand *Op = new ARMOperand(ShifterImmediate);
1165 Op->ShifterImm.isASR = isASR;
1166 Op->ShifterImm.Imm = Imm;
1172 static ARMOperand *CreateRotImm(unsigned Imm, SMLoc S, SMLoc E) {
1173 ARMOperand *Op = new ARMOperand(RotateImmediate);
1174 Op->RotImm.Imm = Imm;
1180 static ARMOperand *CreateBitfield(unsigned LSB, unsigned Width,
1182 ARMOperand *Op = new ARMOperand(BitfieldDescriptor);
1183 Op->Bitfield.LSB = LSB;
1184 Op->Bitfield.Width = Width;
1191 CreateRegList(const SmallVectorImpl<std::pair<unsigned, SMLoc> > &Regs,
1192 SMLoc StartLoc, SMLoc EndLoc) {
1193 KindTy Kind = RegisterList;
1195 if (llvm::ARMMCRegisterClasses[ARM::DPRRegClassID].
1196 contains(Regs.front().first))
1197 Kind = DPRRegisterList;
1198 else if (llvm::ARMMCRegisterClasses[ARM::SPRRegClassID].
1199 contains(Regs.front().first))
1200 Kind = SPRRegisterList;
1202 ARMOperand *Op = new ARMOperand(Kind);
1203 for (SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1204 I = Regs.begin(), E = Regs.end(); I != E; ++I)
1205 Op->Registers.push_back(I->first);
1206 array_pod_sort(Op->Registers.begin(), Op->Registers.end());
1207 Op->StartLoc = StartLoc;
1208 Op->EndLoc = EndLoc;
1212 static ARMOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
1213 ARMOperand *Op = new ARMOperand(Immediate);
1220 static ARMOperand *CreateMem(unsigned BaseRegNum,
1221 const MCConstantExpr *OffsetImm,
1222 unsigned OffsetRegNum,
1223 ARM_AM::ShiftOpc ShiftType,
1227 ARMOperand *Op = new ARMOperand(Memory);
1228 Op->Mem.BaseRegNum = BaseRegNum;
1229 Op->Mem.OffsetImm = OffsetImm;
1230 Op->Mem.OffsetRegNum = OffsetRegNum;
1231 Op->Mem.ShiftType = ShiftType;
1232 Op->Mem.ShiftImm = ShiftImm;
1233 Op->Mem.isNegative = isNegative;
1239 static ARMOperand *CreatePostIdxReg(unsigned RegNum, bool isAdd,
1240 ARM_AM::ShiftOpc ShiftTy,
1243 ARMOperand *Op = new ARMOperand(PostIndexRegister);
1244 Op->PostIdxReg.RegNum = RegNum;
1245 Op->PostIdxReg.isAdd = isAdd;
1246 Op->PostIdxReg.ShiftTy = ShiftTy;
1247 Op->PostIdxReg.ShiftImm = ShiftImm;
1253 static ARMOperand *CreateMemBarrierOpt(ARM_MB::MemBOpt Opt, SMLoc S) {
1254 ARMOperand *Op = new ARMOperand(MemBarrierOpt);
1255 Op->MBOpt.Val = Opt;
1261 static ARMOperand *CreateProcIFlags(ARM_PROC::IFlags IFlags, SMLoc S) {
1262 ARMOperand *Op = new ARMOperand(ProcIFlags);
1263 Op->IFlags.Val = IFlags;
1269 static ARMOperand *CreateMSRMask(unsigned MMask, SMLoc S) {
1270 ARMOperand *Op = new ARMOperand(MSRMask);
1271 Op->MMask.Val = MMask;
1278 } // end anonymous namespace.
1280 void ARMOperand::print(raw_ostream &OS) const {
1283 OS << "<ARMCC::" << ARMCondCodeToString(getCondCode()) << ">";
1286 OS << "<ccout " << getReg() << ">";
1289 OS << "<coprocessor number: " << getCoproc() << ">";
1292 OS << "<coprocessor register: " << getCoproc() << ">";
1295 OS << "<mask: " << getMSRMask() << ">";
1298 getImm()->print(OS);
1301 OS << "<ARM_MB::" << MemBOptToString(getMemBarrierOpt()) << ">";
1305 << " base:" << Mem.BaseRegNum;
1308 case PostIndexRegister:
1309 OS << "post-idx register " << (PostIdxReg.isAdd ? "" : "-")
1310 << PostIdxReg.RegNum;
1311 if (PostIdxReg.ShiftTy != ARM_AM::no_shift)
1312 OS << ARM_AM::getShiftOpcStr(PostIdxReg.ShiftTy) << " "
1313 << PostIdxReg.ShiftImm;
1317 OS << "<ARM_PROC::";
1318 unsigned IFlags = getProcIFlags();
1319 for (int i=2; i >= 0; --i)
1320 if (IFlags & (1 << i))
1321 OS << ARM_PROC::IFlagsToString(1 << i);
1326 OS << "<register " << getReg() << ">";
1328 case ShifterImmediate:
1329 OS << "<shift " << (ShifterImm.isASR ? "asr" : "lsl")
1330 << " #" << ShifterImm.Imm << ">";
1332 case ShiftedRegister:
1333 OS << "<so_reg_reg "
1334 << RegShiftedReg.SrcReg
1335 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedReg.ShiftImm))
1336 << ", " << RegShiftedReg.ShiftReg << ", "
1337 << ARM_AM::getSORegOffset(RegShiftedReg.ShiftImm)
1340 case ShiftedImmediate:
1341 OS << "<so_reg_imm "
1342 << RegShiftedImm.SrcReg
1343 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedImm.ShiftImm))
1344 << ", " << ARM_AM::getSORegOffset(RegShiftedImm.ShiftImm)
1347 case RotateImmediate:
1348 OS << "<ror " << " #" << (RotImm.Imm * 8) << ">";
1350 case BitfieldDescriptor:
1351 OS << "<bitfield " << "lsb: " << Bitfield.LSB
1352 << ", width: " << Bitfield.Width << ">";
1355 case DPRRegisterList:
1356 case SPRRegisterList: {
1357 OS << "<register_list ";
1359 const SmallVectorImpl<unsigned> &RegList = getRegList();
1360 for (SmallVectorImpl<unsigned>::const_iterator
1361 I = RegList.begin(), E = RegList.end(); I != E; ) {
1363 if (++I < E) OS << ", ";
1370 OS << "'" << getToken() << "'";
1375 /// @name Auto-generated Match Functions
1378 static unsigned MatchRegisterName(StringRef Name);
1382 bool ARMAsmParser::ParseRegister(unsigned &RegNo,
1383 SMLoc &StartLoc, SMLoc &EndLoc) {
1384 RegNo = tryParseRegister();
1386 return (RegNo == (unsigned)-1);
1389 /// Try to parse a register name. The token must be an Identifier when called,
1390 /// and if it is a register name the token is eaten and the register number is
1391 /// returned. Otherwise return -1.
1393 int ARMAsmParser::tryParseRegister() {
1394 const AsmToken &Tok = Parser.getTok();
1395 if (Tok.isNot(AsmToken::Identifier)) return -1;
1397 // FIXME: Validate register for the current architecture; we have to do
1398 // validation later, so maybe there is no need for this here.
1399 std::string upperCase = Tok.getString().str();
1400 std::string lowerCase = LowercaseString(upperCase);
1401 unsigned RegNum = MatchRegisterName(lowerCase);
1403 RegNum = StringSwitch<unsigned>(lowerCase)
1404 .Case("r13", ARM::SP)
1405 .Case("r14", ARM::LR)
1406 .Case("r15", ARM::PC)
1407 .Case("ip", ARM::R12)
1410 if (!RegNum) return -1;
1412 Parser.Lex(); // Eat identifier token.
1416 // Try to parse a shifter (e.g., "lsl <amt>"). On success, return 0.
1417 // If a recoverable error occurs, return 1. If an irrecoverable error
1418 // occurs, return -1. An irrecoverable error is one where tokens have been
1419 // consumed in the process of trying to parse the shifter (i.e., when it is
1420 // indeed a shifter operand, but malformed).
1421 int ARMAsmParser::tryParseShiftRegister(
1422 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1423 SMLoc S = Parser.getTok().getLoc();
1424 const AsmToken &Tok = Parser.getTok();
1425 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1427 std::string upperCase = Tok.getString().str();
1428 std::string lowerCase = LowercaseString(upperCase);
1429 ARM_AM::ShiftOpc ShiftTy = StringSwitch<ARM_AM::ShiftOpc>(lowerCase)
1430 .Case("lsl", ARM_AM::lsl)
1431 .Case("lsr", ARM_AM::lsr)
1432 .Case("asr", ARM_AM::asr)
1433 .Case("ror", ARM_AM::ror)
1434 .Case("rrx", ARM_AM::rrx)
1435 .Default(ARM_AM::no_shift);
1437 if (ShiftTy == ARM_AM::no_shift)
1440 Parser.Lex(); // Eat the operator.
1442 // The source register for the shift has already been added to the
1443 // operand list, so we need to pop it off and combine it into the shifted
1444 // register operand instead.
1445 OwningPtr<ARMOperand> PrevOp((ARMOperand*)Operands.pop_back_val());
1446 if (!PrevOp->isReg())
1447 return Error(PrevOp->getStartLoc(), "shift must be of a register");
1448 int SrcReg = PrevOp->getReg();
1451 if (ShiftTy == ARM_AM::rrx) {
1452 // RRX Doesn't have an explicit shift amount. The encoder expects
1453 // the shift register to be the same as the source register. Seems odd,
1457 // Figure out if this is shifted by a constant or a register (for non-RRX).
1458 if (Parser.getTok().is(AsmToken::Hash)) {
1459 Parser.Lex(); // Eat hash.
1460 SMLoc ImmLoc = Parser.getTok().getLoc();
1461 const MCExpr *ShiftExpr = 0;
1462 if (getParser().ParseExpression(ShiftExpr)) {
1463 Error(ImmLoc, "invalid immediate shift value");
1466 // The expression must be evaluatable as an immediate.
1467 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftExpr);
1469 Error(ImmLoc, "invalid immediate shift value");
1472 // Range check the immediate.
1473 // lsl, ror: 0 <= imm <= 31
1474 // lsr, asr: 0 <= imm <= 32
1475 Imm = CE->getValue();
1477 ((ShiftTy == ARM_AM::lsl || ShiftTy == ARM_AM::ror) && Imm > 31) ||
1478 ((ShiftTy == ARM_AM::lsr || ShiftTy == ARM_AM::asr) && Imm > 32)) {
1479 Error(ImmLoc, "immediate shift value out of range");
1482 } else if (Parser.getTok().is(AsmToken::Identifier)) {
1483 ShiftReg = tryParseRegister();
1484 SMLoc L = Parser.getTok().getLoc();
1485 if (ShiftReg == -1) {
1486 Error (L, "expected immediate or register in shift operand");
1490 Error (Parser.getTok().getLoc(),
1491 "expected immediate or register in shift operand");
1496 if (ShiftReg && ShiftTy != ARM_AM::rrx)
1497 Operands.push_back(ARMOperand::CreateShiftedRegister(ShiftTy, SrcReg,
1499 S, Parser.getTok().getLoc()));
1501 Operands.push_back(ARMOperand::CreateShiftedImmediate(ShiftTy, SrcReg, Imm,
1502 S, Parser.getTok().getLoc()));
1508 /// Try to parse a register name. The token must be an Identifier when called.
1509 /// If it's a register, an AsmOperand is created. Another AsmOperand is created
1510 /// if there is a "writeback". 'true' if it's not a register.
1512 /// TODO this is likely to change to allow different register types and or to
1513 /// parse for a specific register type.
1515 tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1516 SMLoc S = Parser.getTok().getLoc();
1517 int RegNo = tryParseRegister();
1521 Operands.push_back(ARMOperand::CreateReg(RegNo, S, Parser.getTok().getLoc()));
1523 const AsmToken &ExclaimTok = Parser.getTok();
1524 if (ExclaimTok.is(AsmToken::Exclaim)) {
1525 Operands.push_back(ARMOperand::CreateToken(ExclaimTok.getString(),
1526 ExclaimTok.getLoc()));
1527 Parser.Lex(); // Eat exclaim token
1533 /// MatchCoprocessorOperandName - Try to parse an coprocessor related
1534 /// instruction with a symbolic operand name. Example: "p1", "p7", "c3",
1536 static int MatchCoprocessorOperandName(StringRef Name, char CoprocOp) {
1537 // Use the same layout as the tablegen'erated register name matcher. Ugly,
1539 switch (Name.size()) {
1542 if (Name[0] != CoprocOp)
1559 if (Name[0] != CoprocOp || Name[1] != '1')
1563 case '0': return 10;
1564 case '1': return 11;
1565 case '2': return 12;
1566 case '3': return 13;
1567 case '4': return 14;
1568 case '5': return 15;
1576 /// parseCoprocNumOperand - Try to parse an coprocessor number operand. The
1577 /// token must be an Identifier when called, and if it is a coprocessor
1578 /// number, the token is eaten and the operand is added to the operand list.
1579 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1580 parseCoprocNumOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1581 SMLoc S = Parser.getTok().getLoc();
1582 const AsmToken &Tok = Parser.getTok();
1583 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1585 int Num = MatchCoprocessorOperandName(Tok.getString(), 'p');
1587 return MatchOperand_NoMatch;
1589 Parser.Lex(); // Eat identifier token.
1590 Operands.push_back(ARMOperand::CreateCoprocNum(Num, S));
1591 return MatchOperand_Success;
1594 /// parseCoprocRegOperand - Try to parse an coprocessor register operand. The
1595 /// token must be an Identifier when called, and if it is a coprocessor
1596 /// number, the token is eaten and the operand is added to the operand list.
1597 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1598 parseCoprocRegOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1599 SMLoc S = Parser.getTok().getLoc();
1600 const AsmToken &Tok = Parser.getTok();
1601 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1603 int Reg = MatchCoprocessorOperandName(Tok.getString(), 'c');
1605 return MatchOperand_NoMatch;
1607 Parser.Lex(); // Eat identifier token.
1608 Operands.push_back(ARMOperand::CreateCoprocReg(Reg, S));
1609 return MatchOperand_Success;
1612 /// Parse a register list, return it if successful else return null. The first
1613 /// token must be a '{' when called.
1615 parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1616 assert(Parser.getTok().is(AsmToken::LCurly) &&
1617 "Token is not a Left Curly Brace");
1618 SMLoc S = Parser.getTok().getLoc();
1620 // Read the rest of the registers in the list.
1621 unsigned PrevRegNum = 0;
1622 SmallVector<std::pair<unsigned, SMLoc>, 32> Registers;
1625 bool IsRange = Parser.getTok().is(AsmToken::Minus);
1626 Parser.Lex(); // Eat non-identifier token.
1628 const AsmToken &RegTok = Parser.getTok();
1629 SMLoc RegLoc = RegTok.getLoc();
1630 if (RegTok.isNot(AsmToken::Identifier)) {
1631 Error(RegLoc, "register expected");
1635 int RegNum = tryParseRegister();
1637 Error(RegLoc, "register expected");
1642 int Reg = PrevRegNum;
1645 Registers.push_back(std::make_pair(Reg, RegLoc));
1646 } while (Reg != RegNum);
1648 Registers.push_back(std::make_pair(RegNum, RegLoc));
1651 PrevRegNum = RegNum;
1652 } while (Parser.getTok().is(AsmToken::Comma) ||
1653 Parser.getTok().is(AsmToken::Minus));
1655 // Process the right curly brace of the list.
1656 const AsmToken &RCurlyTok = Parser.getTok();
1657 if (RCurlyTok.isNot(AsmToken::RCurly)) {
1658 Error(RCurlyTok.getLoc(), "'}' expected");
1662 SMLoc E = RCurlyTok.getLoc();
1663 Parser.Lex(); // Eat right curly brace token.
1665 // Verify the register list.
1666 bool EmittedWarning = false;
1667 unsigned HighRegNum = 0;
1668 BitVector RegMap(32);
1669 for (unsigned i = 0, e = Registers.size(); i != e; ++i) {
1670 const std::pair<unsigned, SMLoc> &RegInfo = Registers[i];
1671 unsigned Reg = getARMRegisterNumbering(RegInfo.first);
1674 Error(RegInfo.second, "register duplicated in register list");
1678 if (!EmittedWarning && Reg < HighRegNum)
1679 Warning(RegInfo.second,
1680 "register not in ascending order in register list");
1683 HighRegNum = std::max(Reg, HighRegNum);
1686 Operands.push_back(ARMOperand::CreateRegList(Registers, S, E));
1690 /// parseMemBarrierOptOperand - Try to parse DSB/DMB data barrier options.
1691 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1692 parseMemBarrierOptOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1693 SMLoc S = Parser.getTok().getLoc();
1694 const AsmToken &Tok = Parser.getTok();
1695 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1696 StringRef OptStr = Tok.getString();
1698 unsigned Opt = StringSwitch<unsigned>(OptStr.slice(0, OptStr.size()))
1699 .Case("sy", ARM_MB::SY)
1700 .Case("st", ARM_MB::ST)
1701 .Case("sh", ARM_MB::ISH)
1702 .Case("ish", ARM_MB::ISH)
1703 .Case("shst", ARM_MB::ISHST)
1704 .Case("ishst", ARM_MB::ISHST)
1705 .Case("nsh", ARM_MB::NSH)
1706 .Case("un", ARM_MB::NSH)
1707 .Case("nshst", ARM_MB::NSHST)
1708 .Case("unst", ARM_MB::NSHST)
1709 .Case("osh", ARM_MB::OSH)
1710 .Case("oshst", ARM_MB::OSHST)
1714 return MatchOperand_NoMatch;
1716 Parser.Lex(); // Eat identifier token.
1717 Operands.push_back(ARMOperand::CreateMemBarrierOpt((ARM_MB::MemBOpt)Opt, S));
1718 return MatchOperand_Success;
1721 /// parseProcIFlagsOperand - Try to parse iflags from CPS instruction.
1722 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1723 parseProcIFlagsOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1724 SMLoc S = Parser.getTok().getLoc();
1725 const AsmToken &Tok = Parser.getTok();
1726 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1727 StringRef IFlagsStr = Tok.getString();
1729 unsigned IFlags = 0;
1730 for (int i = 0, e = IFlagsStr.size(); i != e; ++i) {
1731 unsigned Flag = StringSwitch<unsigned>(IFlagsStr.substr(i, 1))
1732 .Case("a", ARM_PROC::A)
1733 .Case("i", ARM_PROC::I)
1734 .Case("f", ARM_PROC::F)
1737 // If some specific iflag is already set, it means that some letter is
1738 // present more than once, this is not acceptable.
1739 if (Flag == ~0U || (IFlags & Flag))
1740 return MatchOperand_NoMatch;
1745 Parser.Lex(); // Eat identifier token.
1746 Operands.push_back(ARMOperand::CreateProcIFlags((ARM_PROC::IFlags)IFlags, S));
1747 return MatchOperand_Success;
1750 /// parseMSRMaskOperand - Try to parse mask flags from MSR instruction.
1751 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1752 parseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1753 SMLoc S = Parser.getTok().getLoc();
1754 const AsmToken &Tok = Parser.getTok();
1755 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1756 StringRef Mask = Tok.getString();
1758 // Split spec_reg from flag, example: CPSR_sxf => "CPSR" and "sxf"
1759 size_t Start = 0, Next = Mask.find('_');
1760 StringRef Flags = "";
1761 std::string SpecReg = LowercaseString(Mask.slice(Start, Next));
1762 if (Next != StringRef::npos)
1763 Flags = Mask.slice(Next+1, Mask.size());
1765 // FlagsVal contains the complete mask:
1767 // 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1768 unsigned FlagsVal = 0;
1770 if (SpecReg == "apsr") {
1771 FlagsVal = StringSwitch<unsigned>(Flags)
1772 .Case("nzcvq", 0x8) // same as CPSR_f
1773 .Case("g", 0x4) // same as CPSR_s
1774 .Case("nzcvqg", 0xc) // same as CPSR_fs
1777 if (FlagsVal == ~0U) {
1779 return MatchOperand_NoMatch;
1781 FlagsVal = 0; // No flag
1783 } else if (SpecReg == "cpsr" || SpecReg == "spsr") {
1784 if (Flags == "all") // cpsr_all is an alias for cpsr_fc
1786 for (int i = 0, e = Flags.size(); i != e; ++i) {
1787 unsigned Flag = StringSwitch<unsigned>(Flags.substr(i, 1))
1794 // If some specific flag is already set, it means that some letter is
1795 // present more than once, this is not acceptable.
1796 if (FlagsVal == ~0U || (FlagsVal & Flag))
1797 return MatchOperand_NoMatch;
1800 } else // No match for special register.
1801 return MatchOperand_NoMatch;
1803 // Special register without flags are equivalent to "fc" flags.
1807 // Bit 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1808 if (SpecReg == "spsr")
1811 Parser.Lex(); // Eat identifier token.
1812 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
1813 return MatchOperand_Success;
1816 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1817 parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands, StringRef Op,
1818 int Low, int High) {
1819 const AsmToken &Tok = Parser.getTok();
1820 if (Tok.isNot(AsmToken::Identifier)) {
1821 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1822 return MatchOperand_ParseFail;
1824 StringRef ShiftName = Tok.getString();
1825 std::string LowerOp = LowercaseString(Op);
1826 std::string UpperOp = UppercaseString(Op);
1827 if (ShiftName != LowerOp && ShiftName != UpperOp) {
1828 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1829 return MatchOperand_ParseFail;
1831 Parser.Lex(); // Eat shift type token.
1833 // There must be a '#' and a shift amount.
1834 if (Parser.getTok().isNot(AsmToken::Hash)) {
1835 Error(Parser.getTok().getLoc(), "'#' expected");
1836 return MatchOperand_ParseFail;
1838 Parser.Lex(); // Eat hash token.
1840 const MCExpr *ShiftAmount;
1841 SMLoc Loc = Parser.getTok().getLoc();
1842 if (getParser().ParseExpression(ShiftAmount)) {
1843 Error(Loc, "illegal expression");
1844 return MatchOperand_ParseFail;
1846 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1848 Error(Loc, "constant expression expected");
1849 return MatchOperand_ParseFail;
1851 int Val = CE->getValue();
1852 if (Val < Low || Val > High) {
1853 Error(Loc, "immediate value out of range");
1854 return MatchOperand_ParseFail;
1857 Operands.push_back(ARMOperand::CreateImm(CE, Loc, Parser.getTok().getLoc()));
1859 return MatchOperand_Success;
1862 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1863 parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1864 const AsmToken &Tok = Parser.getTok();
1865 SMLoc S = Tok.getLoc();
1866 if (Tok.isNot(AsmToken::Identifier)) {
1867 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1868 return MatchOperand_ParseFail;
1870 int Val = StringSwitch<int>(Tok.getString())
1874 Parser.Lex(); // Eat the token.
1877 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1878 return MatchOperand_ParseFail;
1880 Operands.push_back(ARMOperand::CreateImm(MCConstantExpr::Create(Val,
1882 S, Parser.getTok().getLoc()));
1883 return MatchOperand_Success;
1886 /// parseShifterImm - Parse the shifter immediate operand for SSAT/USAT
1887 /// instructions. Legal values are:
1888 /// lsl #n 'n' in [0,31]
1889 /// asr #n 'n' in [1,32]
1890 /// n == 32 encoded as n == 0.
1891 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1892 parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1893 const AsmToken &Tok = Parser.getTok();
1894 SMLoc S = Tok.getLoc();
1895 if (Tok.isNot(AsmToken::Identifier)) {
1896 Error(S, "shift operator 'asr' or 'lsl' expected");
1897 return MatchOperand_ParseFail;
1899 StringRef ShiftName = Tok.getString();
1901 if (ShiftName == "lsl" || ShiftName == "LSL")
1903 else if (ShiftName == "asr" || ShiftName == "ASR")
1906 Error(S, "shift operator 'asr' or 'lsl' expected");
1907 return MatchOperand_ParseFail;
1909 Parser.Lex(); // Eat the operator.
1911 // A '#' and a shift amount.
1912 if (Parser.getTok().isNot(AsmToken::Hash)) {
1913 Error(Parser.getTok().getLoc(), "'#' expected");
1914 return MatchOperand_ParseFail;
1916 Parser.Lex(); // Eat hash token.
1918 const MCExpr *ShiftAmount;
1919 SMLoc E = Parser.getTok().getLoc();
1920 if (getParser().ParseExpression(ShiftAmount)) {
1921 Error(E, "malformed shift expression");
1922 return MatchOperand_ParseFail;
1924 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1926 Error(E, "shift amount must be an immediate");
1927 return MatchOperand_ParseFail;
1930 int64_t Val = CE->getValue();
1932 // Shift amount must be in [1,32]
1933 if (Val < 1 || Val > 32) {
1934 Error(E, "'asr' shift amount must be in range [1,32]");
1935 return MatchOperand_ParseFail;
1937 // asr #32 encoded as asr #0.
1938 if (Val == 32) Val = 0;
1940 // Shift amount must be in [1,32]
1941 if (Val < 0 || Val > 31) {
1942 Error(E, "'lsr' shift amount must be in range [0,31]");
1943 return MatchOperand_ParseFail;
1947 E = Parser.getTok().getLoc();
1948 Operands.push_back(ARMOperand::CreateShifterImm(isASR, Val, S, E));
1950 return MatchOperand_Success;
1953 /// parseRotImm - Parse the shifter immediate operand for SXTB/UXTB family
1954 /// of instructions. Legal values are:
1955 /// ror #n 'n' in {0, 8, 16, 24}
1956 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1957 parseRotImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1958 const AsmToken &Tok = Parser.getTok();
1959 SMLoc S = Tok.getLoc();
1960 if (Tok.isNot(AsmToken::Identifier)) {
1961 Error(S, "rotate operator 'ror' expected");
1962 return MatchOperand_ParseFail;
1964 StringRef ShiftName = Tok.getString();
1965 if (ShiftName != "ror" && ShiftName != "ROR") {
1966 Error(S, "rotate operator 'ror' expected");
1967 return MatchOperand_ParseFail;
1969 Parser.Lex(); // Eat the operator.
1971 // A '#' and a rotate amount.
1972 if (Parser.getTok().isNot(AsmToken::Hash)) {
1973 Error(Parser.getTok().getLoc(), "'#' expected");
1974 return MatchOperand_ParseFail;
1976 Parser.Lex(); // Eat hash token.
1978 const MCExpr *ShiftAmount;
1979 SMLoc E = Parser.getTok().getLoc();
1980 if (getParser().ParseExpression(ShiftAmount)) {
1981 Error(E, "malformed rotate expression");
1982 return MatchOperand_ParseFail;
1984 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1986 Error(E, "rotate amount must be an immediate");
1987 return MatchOperand_ParseFail;
1990 int64_t Val = CE->getValue();
1991 // Shift amount must be in {0, 8, 16, 24} (0 is undocumented extension)
1992 // normally, zero is represented in asm by omitting the rotate operand
1994 if (Val != 8 && Val != 16 && Val != 24 && Val != 0) {
1995 Error(E, "'ror' rotate amount must be 8, 16, or 24");
1996 return MatchOperand_ParseFail;
1999 E = Parser.getTok().getLoc();
2000 Operands.push_back(ARMOperand::CreateRotImm(Val, S, E));
2002 return MatchOperand_Success;
2005 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2006 parseBitfield(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2007 SMLoc S = Parser.getTok().getLoc();
2008 // The bitfield descriptor is really two operands, the LSB and the width.
2009 if (Parser.getTok().isNot(AsmToken::Hash)) {
2010 Error(Parser.getTok().getLoc(), "'#' expected");
2011 return MatchOperand_ParseFail;
2013 Parser.Lex(); // Eat hash token.
2015 const MCExpr *LSBExpr;
2016 SMLoc E = Parser.getTok().getLoc();
2017 if (getParser().ParseExpression(LSBExpr)) {
2018 Error(E, "malformed immediate expression");
2019 return MatchOperand_ParseFail;
2021 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(LSBExpr);
2023 Error(E, "'lsb' operand must be an immediate");
2024 return MatchOperand_ParseFail;
2027 int64_t LSB = CE->getValue();
2028 // The LSB must be in the range [0,31]
2029 if (LSB < 0 || LSB > 31) {
2030 Error(E, "'lsb' operand must be in the range [0,31]");
2031 return MatchOperand_ParseFail;
2033 E = Parser.getTok().getLoc();
2035 // Expect another immediate operand.
2036 if (Parser.getTok().isNot(AsmToken::Comma)) {
2037 Error(Parser.getTok().getLoc(), "too few operands");
2038 return MatchOperand_ParseFail;
2040 Parser.Lex(); // Eat hash token.
2041 if (Parser.getTok().isNot(AsmToken::Hash)) {
2042 Error(Parser.getTok().getLoc(), "'#' expected");
2043 return MatchOperand_ParseFail;
2045 Parser.Lex(); // Eat hash token.
2047 const MCExpr *WidthExpr;
2048 if (getParser().ParseExpression(WidthExpr)) {
2049 Error(E, "malformed immediate expression");
2050 return MatchOperand_ParseFail;
2052 CE = dyn_cast<MCConstantExpr>(WidthExpr);
2054 Error(E, "'width' operand must be an immediate");
2055 return MatchOperand_ParseFail;
2058 int64_t Width = CE->getValue();
2059 // The LSB must be in the range [1,32-lsb]
2060 if (Width < 1 || Width > 32 - LSB) {
2061 Error(E, "'width' operand must be in the range [1,32-lsb]");
2062 return MatchOperand_ParseFail;
2064 E = Parser.getTok().getLoc();
2066 Operands.push_back(ARMOperand::CreateBitfield(LSB, Width, S, E));
2068 return MatchOperand_Success;
2071 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2072 parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2073 // Check for a post-index addressing register operand. Specifically:
2074 // postidx_reg := '+' register {, shift}
2075 // | '-' register {, shift}
2076 // | register {, shift}
2078 // This method must return MatchOperand_NoMatch without consuming any tokens
2079 // in the case where there is no match, as other alternatives take other
2081 AsmToken Tok = Parser.getTok();
2082 SMLoc S = Tok.getLoc();
2083 bool haveEaten = false;
2086 if (Tok.is(AsmToken::Plus)) {
2087 Parser.Lex(); // Eat the '+' token.
2089 } else if (Tok.is(AsmToken::Minus)) {
2090 Parser.Lex(); // Eat the '-' token.
2094 if (Parser.getTok().is(AsmToken::Identifier))
2095 Reg = tryParseRegister();
2098 return MatchOperand_NoMatch;
2099 Error(Parser.getTok().getLoc(), "register expected");
2100 return MatchOperand_ParseFail;
2102 SMLoc E = Parser.getTok().getLoc();
2104 ARM_AM::ShiftOpc ShiftTy = ARM_AM::no_shift;
2105 unsigned ShiftImm = 0;
2106 if (Parser.getTok().is(AsmToken::Comma)) {
2107 Parser.Lex(); // Eat the ','.
2108 if (parseMemRegOffsetShift(ShiftTy, ShiftImm))
2109 return MatchOperand_ParseFail;
2112 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ShiftTy,
2115 return MatchOperand_Success;
2118 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2119 parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2120 // Check for a post-index addressing register operand. Specifically:
2121 // am3offset := '+' register
2128 // This method must return MatchOperand_NoMatch without consuming any tokens
2129 // in the case where there is no match, as other alternatives take other
2131 AsmToken Tok = Parser.getTok();
2132 SMLoc S = Tok.getLoc();
2134 // Do immediates first, as we always parse those if we have a '#'.
2135 if (Parser.getTok().is(AsmToken::Hash)) {
2136 Parser.Lex(); // Eat the '#'.
2137 // Explicitly look for a '-', as we need to encode negative zero
2139 bool isNegative = Parser.getTok().is(AsmToken::Minus);
2140 const MCExpr *Offset;
2141 if (getParser().ParseExpression(Offset))
2142 return MatchOperand_ParseFail;
2143 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2145 Error(S, "constant expression expected");
2146 return MatchOperand_ParseFail;
2148 SMLoc E = Tok.getLoc();
2149 // Negative zero is encoded as the flag value INT32_MIN.
2150 int32_t Val = CE->getValue();
2151 if (isNegative && Val == 0)
2155 ARMOperand::CreateImm(MCConstantExpr::Create(Val, getContext()), S, E));
2157 return MatchOperand_Success;
2161 bool haveEaten = false;
2164 if (Tok.is(AsmToken::Plus)) {
2165 Parser.Lex(); // Eat the '+' token.
2167 } else if (Tok.is(AsmToken::Minus)) {
2168 Parser.Lex(); // Eat the '-' token.
2172 if (Parser.getTok().is(AsmToken::Identifier))
2173 Reg = tryParseRegister();
2176 return MatchOperand_NoMatch;
2177 Error(Parser.getTok().getLoc(), "register expected");
2178 return MatchOperand_ParseFail;
2180 SMLoc E = Parser.getTok().getLoc();
2182 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ARM_AM::no_shift,
2185 return MatchOperand_Success;
2188 /// cvtLdWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2189 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2190 /// when they refer multiple MIOperands inside a single one.
2192 cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2193 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2194 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2196 // Create a writeback register dummy placeholder.
2197 Inst.addOperand(MCOperand::CreateImm(0));
2199 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2200 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2204 /// cvtStWriteBackRegAddrModeImm12 - Convert parsed operands to MCInst.
2205 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2206 /// when they refer multiple MIOperands inside a single one.
2208 cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
2209 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2210 // Create a writeback register dummy placeholder.
2211 Inst.addOperand(MCOperand::CreateImm(0));
2212 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2213 ((ARMOperand*)Operands[3])->addMemImm12OffsetOperands(Inst, 2);
2214 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2218 /// cvtStWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2219 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2220 /// when they refer multiple MIOperands inside a single one.
2222 cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2223 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2224 // Create a writeback register dummy placeholder.
2225 Inst.addOperand(MCOperand::CreateImm(0));
2226 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2227 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2228 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2232 /// cvtStWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
2233 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2234 /// when they refer multiple MIOperands inside a single one.
2236 cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
2237 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2238 // Create a writeback register dummy placeholder.
2239 Inst.addOperand(MCOperand::CreateImm(0));
2240 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2241 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
2242 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2246 /// cvtLdExtTWriteBackImm - Convert parsed operands to MCInst.
2247 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2248 /// when they refer multiple MIOperands inside a single one.
2250 cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2251 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2253 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2254 // Create a writeback register dummy placeholder.
2255 Inst.addOperand(MCOperand::CreateImm(0));
2257 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2259 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2261 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2265 /// cvtLdExtTWriteBackReg - Convert parsed operands to MCInst.
2266 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2267 /// when they refer multiple MIOperands inside a single one.
2269 cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2270 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2272 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2273 // Create a writeback register dummy placeholder.
2274 Inst.addOperand(MCOperand::CreateImm(0));
2276 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2278 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2280 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2284 /// cvtStExtTWriteBackImm - Convert parsed operands to MCInst.
2285 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2286 /// when they refer multiple MIOperands inside a single one.
2288 cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2289 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2290 // Create a writeback register dummy placeholder.
2291 Inst.addOperand(MCOperand::CreateImm(0));
2293 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2295 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2297 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2299 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2303 /// cvtStExtTWriteBackReg - Convert parsed operands to MCInst.
2304 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2305 /// when they refer multiple MIOperands inside a single one.
2307 cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2308 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2309 // Create a writeback register dummy placeholder.
2310 Inst.addOperand(MCOperand::CreateImm(0));
2312 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2314 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2316 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2318 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2322 /// cvtLdrdPre - Convert parsed operands to MCInst.
2323 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2324 /// when they refer multiple MIOperands inside a single one.
2326 cvtLdrdPre(MCInst &Inst, unsigned Opcode,
2327 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2329 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2330 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2331 // Create a writeback register dummy placeholder.
2332 Inst.addOperand(MCOperand::CreateImm(0));
2334 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
2336 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2340 /// cvtStrdPre - Convert parsed operands to MCInst.
2341 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2342 /// when they refer multiple MIOperands inside a single one.
2344 cvtStrdPre(MCInst &Inst, unsigned Opcode,
2345 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2346 // Create a writeback register dummy placeholder.
2347 Inst.addOperand(MCOperand::CreateImm(0));
2349 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2350 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2352 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
2354 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2358 /// cvtLdWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
2359 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2360 /// when they refer multiple MIOperands inside a single one.
2362 cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
2363 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2364 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2365 // Create a writeback register dummy placeholder.
2366 Inst.addOperand(MCOperand::CreateImm(0));
2367 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
2368 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2372 /// cvtThumbMultiple- Convert parsed operands to MCInst.
2373 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2374 /// when they refer multiple MIOperands inside a single one.
2376 cvtThumbMultiply(MCInst &Inst, unsigned Opcode,
2377 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2378 // The second source operand must be the same register as the destination
2380 if (Operands.size() == 6 &&
2381 (((ARMOperand*)Operands[3])->getReg() !=
2382 ((ARMOperand*)Operands[5])->getReg()) &&
2383 (((ARMOperand*)Operands[3])->getReg() !=
2384 ((ARMOperand*)Operands[4])->getReg())) {
2385 Error(Operands[3]->getStartLoc(),
2386 "destination register must match source register");
2389 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2390 ((ARMOperand*)Operands[1])->addCCOutOperands(Inst, 1);
2391 ((ARMOperand*)Operands[4])->addRegOperands(Inst, 1);
2392 // If we have a three-operand form, use that, else the second source operand
2393 // is just the destination operand again.
2394 if (Operands.size() == 6)
2395 ((ARMOperand*)Operands[5])->addRegOperands(Inst, 1);
2397 Inst.addOperand(Inst.getOperand(0));
2398 ((ARMOperand*)Operands[2])->addCondCodeOperands(Inst, 2);
2403 /// Parse an ARM memory expression, return false if successful else return true
2404 /// or an error. The first token must be a '[' when called.
2406 parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2408 assert(Parser.getTok().is(AsmToken::LBrac) &&
2409 "Token is not a Left Bracket");
2410 S = Parser.getTok().getLoc();
2411 Parser.Lex(); // Eat left bracket token.
2413 const AsmToken &BaseRegTok = Parser.getTok();
2414 int BaseRegNum = tryParseRegister();
2415 if (BaseRegNum == -1)
2416 return Error(BaseRegTok.getLoc(), "register expected");
2418 // The next token must either be a comma or a closing bracket.
2419 const AsmToken &Tok = Parser.getTok();
2420 if (!Tok.is(AsmToken::Comma) && !Tok.is(AsmToken::RBrac))
2421 return Error(Tok.getLoc(), "malformed memory operand");
2423 if (Tok.is(AsmToken::RBrac)) {
2425 Parser.Lex(); // Eat right bracket token.
2427 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0, ARM_AM::no_shift,
2433 assert(Tok.is(AsmToken::Comma) && "Lost comma in memory operand?!");
2434 Parser.Lex(); // Eat the comma.
2436 // If we have a '#' it's an immediate offset, else assume it's a register
2438 if (Parser.getTok().is(AsmToken::Hash)) {
2439 Parser.Lex(); // Eat the '#'.
2440 E = Parser.getTok().getLoc();
2442 // FIXME: Special case #-0 so we can correctly set the U bit.
2444 const MCExpr *Offset;
2445 if (getParser().ParseExpression(Offset))
2448 // The expression has to be a constant. Memory references with relocations
2449 // don't come through here, as they use the <label> forms of the relevant
2451 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2453 return Error (E, "constant expression expected");
2455 // Now we should have the closing ']'
2456 E = Parser.getTok().getLoc();
2457 if (Parser.getTok().isNot(AsmToken::RBrac))
2458 return Error(E, "']' expected");
2459 Parser.Lex(); // Eat right bracket token.
2461 // Don't worry about range checking the value here. That's handled by
2462 // the is*() predicates.
2463 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, CE, 0,
2464 ARM_AM::no_shift, 0, false, S,E));
2466 // If there's a pre-indexing writeback marker, '!', just add it as a token
2468 if (Parser.getTok().is(AsmToken::Exclaim)) {
2469 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2470 Parser.Lex(); // Eat the '!'.
2476 // The register offset is optionally preceded by a '+' or '-'
2477 bool isNegative = false;
2478 if (Parser.getTok().is(AsmToken::Minus)) {
2480 Parser.Lex(); // Eat the '-'.
2481 } else if (Parser.getTok().is(AsmToken::Plus)) {
2483 Parser.Lex(); // Eat the '+'.
2486 E = Parser.getTok().getLoc();
2487 int OffsetRegNum = tryParseRegister();
2488 if (OffsetRegNum == -1)
2489 return Error(E, "register expected");
2491 // If there's a shift operator, handle it.
2492 ARM_AM::ShiftOpc ShiftType = ARM_AM::no_shift;
2493 unsigned ShiftImm = 0;
2494 if (Parser.getTok().is(AsmToken::Comma)) {
2495 Parser.Lex(); // Eat the ','.
2496 if (parseMemRegOffsetShift(ShiftType, ShiftImm))
2500 // Now we should have the closing ']'
2501 E = Parser.getTok().getLoc();
2502 if (Parser.getTok().isNot(AsmToken::RBrac))
2503 return Error(E, "']' expected");
2504 Parser.Lex(); // Eat right bracket token.
2506 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, OffsetRegNum,
2507 ShiftType, ShiftImm, isNegative,
2510 // If there's a pre-indexing writeback marker, '!', just add it as a token
2512 if (Parser.getTok().is(AsmToken::Exclaim)) {
2513 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2514 Parser.Lex(); // Eat the '!'.
2520 /// parseMemRegOffsetShift - one of these two:
2521 /// ( lsl | lsr | asr | ror ) , # shift_amount
2523 /// return true if it parses a shift otherwise it returns false.
2524 bool ARMAsmParser::parseMemRegOffsetShift(ARM_AM::ShiftOpc &St,
2526 SMLoc Loc = Parser.getTok().getLoc();
2527 const AsmToken &Tok = Parser.getTok();
2528 if (Tok.isNot(AsmToken::Identifier))
2530 StringRef ShiftName = Tok.getString();
2531 if (ShiftName == "lsl" || ShiftName == "LSL")
2533 else if (ShiftName == "lsr" || ShiftName == "LSR")
2535 else if (ShiftName == "asr" || ShiftName == "ASR")
2537 else if (ShiftName == "ror" || ShiftName == "ROR")
2539 else if (ShiftName == "rrx" || ShiftName == "RRX")
2542 return Error(Loc, "illegal shift operator");
2543 Parser.Lex(); // Eat shift type token.
2545 // rrx stands alone.
2547 if (St != ARM_AM::rrx) {
2548 Loc = Parser.getTok().getLoc();
2549 // A '#' and a shift amount.
2550 const AsmToken &HashTok = Parser.getTok();
2551 if (HashTok.isNot(AsmToken::Hash))
2552 return Error(HashTok.getLoc(), "'#' expected");
2553 Parser.Lex(); // Eat hash token.
2556 if (getParser().ParseExpression(Expr))
2558 // Range check the immediate.
2559 // lsl, ror: 0 <= imm <= 31
2560 // lsr, asr: 0 <= imm <= 32
2561 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
2563 return Error(Loc, "shift amount must be an immediate");
2564 int64_t Imm = CE->getValue();
2566 ((St == ARM_AM::lsl || St == ARM_AM::ror) && Imm > 31) ||
2567 ((St == ARM_AM::lsr || St == ARM_AM::asr) && Imm > 32))
2568 return Error(Loc, "immediate shift value out of range");
2575 /// Parse a arm instruction operand. For now this parses the operand regardless
2576 /// of the mnemonic.
2577 bool ARMAsmParser::parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2578 StringRef Mnemonic) {
2581 // Check if the current operand has a custom associated parser, if so, try to
2582 // custom parse the operand, or fallback to the general approach.
2583 OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
2584 if (ResTy == MatchOperand_Success)
2586 // If there wasn't a custom match, try the generic matcher below. Otherwise,
2587 // there was a match, but an error occurred, in which case, just return that
2588 // the operand parsing failed.
2589 if (ResTy == MatchOperand_ParseFail)
2592 switch (getLexer().getKind()) {
2594 Error(Parser.getTok().getLoc(), "unexpected token in operand");
2596 case AsmToken::Identifier: {
2597 if (!tryParseRegisterWithWriteBack(Operands))
2599 int Res = tryParseShiftRegister(Operands);
2600 if (Res == 0) // success
2602 else if (Res == -1) // irrecoverable error
2605 // Fall though for the Identifier case that is not a register or a
2608 case AsmToken::Integer: // things like 1f and 2b as a branch targets
2609 case AsmToken::Dot: { // . as a branch target
2610 // This was not a register so parse other operands that start with an
2611 // identifier (like labels) as expressions and create them as immediates.
2612 const MCExpr *IdVal;
2613 S = Parser.getTok().getLoc();
2614 if (getParser().ParseExpression(IdVal))
2616 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2617 Operands.push_back(ARMOperand::CreateImm(IdVal, S, E));
2620 case AsmToken::LBrac:
2621 return parseMemory(Operands);
2622 case AsmToken::LCurly:
2623 return parseRegisterList(Operands);
2624 case AsmToken::Hash:
2625 // #42 -> immediate.
2626 // TODO: ":lower16:" and ":upper16:" modifiers after # before immediate
2627 S = Parser.getTok().getLoc();
2629 const MCExpr *ImmVal;
2630 if (getParser().ParseExpression(ImmVal))
2632 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2633 Operands.push_back(ARMOperand::CreateImm(ImmVal, S, E));
2635 case AsmToken::Colon: {
2636 // ":lower16:" and ":upper16:" expression prefixes
2637 // FIXME: Check it's an expression prefix,
2638 // e.g. (FOO - :lower16:BAR) isn't legal.
2639 ARMMCExpr::VariantKind RefKind;
2640 if (parsePrefix(RefKind))
2643 const MCExpr *SubExprVal;
2644 if (getParser().ParseExpression(SubExprVal))
2647 const MCExpr *ExprVal = ARMMCExpr::Create(RefKind, SubExprVal,
2649 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2650 Operands.push_back(ARMOperand::CreateImm(ExprVal, S, E));
2656 // parsePrefix - Parse ARM 16-bit relocations expression prefix, i.e.
2657 // :lower16: and :upper16:.
2658 bool ARMAsmParser::parsePrefix(ARMMCExpr::VariantKind &RefKind) {
2659 RefKind = ARMMCExpr::VK_ARM_None;
2661 // :lower16: and :upper16: modifiers
2662 assert(getLexer().is(AsmToken::Colon) && "expected a :");
2663 Parser.Lex(); // Eat ':'
2665 if (getLexer().isNot(AsmToken::Identifier)) {
2666 Error(Parser.getTok().getLoc(), "expected prefix identifier in operand");
2670 StringRef IDVal = Parser.getTok().getIdentifier();
2671 if (IDVal == "lower16") {
2672 RefKind = ARMMCExpr::VK_ARM_LO16;
2673 } else if (IDVal == "upper16") {
2674 RefKind = ARMMCExpr::VK_ARM_HI16;
2676 Error(Parser.getTok().getLoc(), "unexpected prefix in operand");
2681 if (getLexer().isNot(AsmToken::Colon)) {
2682 Error(Parser.getTok().getLoc(), "unexpected token after prefix");
2685 Parser.Lex(); // Eat the last ':'
2690 ARMAsmParser::applyPrefixToExpr(const MCExpr *E,
2691 MCSymbolRefExpr::VariantKind Variant) {
2692 // Recurse over the given expression, rebuilding it to apply the given variant
2693 // to the leftmost symbol.
2694 if (Variant == MCSymbolRefExpr::VK_None)
2697 switch (E->getKind()) {
2698 case MCExpr::Target:
2699 llvm_unreachable("Can't handle target expr yet");
2700 case MCExpr::Constant:
2701 llvm_unreachable("Can't handle lower16/upper16 of constant yet");
2703 case MCExpr::SymbolRef: {
2704 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
2706 if (SRE->getKind() != MCSymbolRefExpr::VK_None)
2709 return MCSymbolRefExpr::Create(&SRE->getSymbol(), Variant, getContext());
2713 llvm_unreachable("Can't handle unary expressions yet");
2715 case MCExpr::Binary: {
2716 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
2717 const MCExpr *LHS = applyPrefixToExpr(BE->getLHS(), Variant);
2718 const MCExpr *RHS = BE->getRHS();
2722 return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, getContext());
2726 assert(0 && "Invalid expression kind!");
2730 /// \brief Given a mnemonic, split out possible predication code and carry
2731 /// setting letters to form a canonical mnemonic and flags.
2733 // FIXME: Would be nice to autogen this.
2734 StringRef ARMAsmParser::splitMnemonic(StringRef Mnemonic,
2735 unsigned &PredicationCode,
2737 unsigned &ProcessorIMod) {
2738 PredicationCode = ARMCC::AL;
2739 CarrySetting = false;
2742 // Ignore some mnemonics we know aren't predicated forms.
2744 // FIXME: Would be nice to autogen this.
2745 if ((Mnemonic == "movs" && isThumb()) ||
2746 Mnemonic == "teq" || Mnemonic == "vceq" || Mnemonic == "svc" ||
2747 Mnemonic == "mls" || Mnemonic == "smmls" || Mnemonic == "vcls" ||
2748 Mnemonic == "vmls" || Mnemonic == "vnmls" || Mnemonic == "vacge" ||
2749 Mnemonic == "vcge" || Mnemonic == "vclt" || Mnemonic == "vacgt" ||
2750 Mnemonic == "vcgt" || Mnemonic == "vcle" || Mnemonic == "smlal" ||
2751 Mnemonic == "umaal" || Mnemonic == "umlal" || Mnemonic == "vabal" ||
2752 Mnemonic == "vmlal" || Mnemonic == "vpadal" || Mnemonic == "vqdmlal")
2755 // First, split out any predication code. Ignore mnemonics we know aren't
2756 // predicated but do have a carry-set and so weren't caught above.
2757 if (Mnemonic != "adcs" && Mnemonic != "bics" && Mnemonic != "movs" &&
2758 Mnemonic != "muls" && Mnemonic != "smlals" && Mnemonic != "smulls" &&
2759 Mnemonic != "umlals" && Mnemonic != "umulls" && Mnemonic != "lsls" &&
2760 Mnemonic != "sbcs") {
2761 unsigned CC = StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2))
2762 .Case("eq", ARMCC::EQ)
2763 .Case("ne", ARMCC::NE)
2764 .Case("hs", ARMCC::HS)
2765 .Case("cs", ARMCC::HS)
2766 .Case("lo", ARMCC::LO)
2767 .Case("cc", ARMCC::LO)
2768 .Case("mi", ARMCC::MI)
2769 .Case("pl", ARMCC::PL)
2770 .Case("vs", ARMCC::VS)
2771 .Case("vc", ARMCC::VC)
2772 .Case("hi", ARMCC::HI)
2773 .Case("ls", ARMCC::LS)
2774 .Case("ge", ARMCC::GE)
2775 .Case("lt", ARMCC::LT)
2776 .Case("gt", ARMCC::GT)
2777 .Case("le", ARMCC::LE)
2778 .Case("al", ARMCC::AL)
2781 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 2);
2782 PredicationCode = CC;
2786 // Next, determine if we have a carry setting bit. We explicitly ignore all
2787 // the instructions we know end in 's'.
2788 if (Mnemonic.endswith("s") &&
2789 !(Mnemonic == "cps" || Mnemonic == "mls" ||
2790 Mnemonic == "mrs" || Mnemonic == "smmls" || Mnemonic == "vabs" ||
2791 Mnemonic == "vcls" || Mnemonic == "vmls" || Mnemonic == "vmrs" ||
2792 Mnemonic == "vnmls" || Mnemonic == "vqabs" || Mnemonic == "vrecps" ||
2793 Mnemonic == "vrsqrts" || Mnemonic == "srs" ||
2794 (Mnemonic == "movs" && isThumb()))) {
2795 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 1);
2796 CarrySetting = true;
2799 // The "cps" instruction can have a interrupt mode operand which is glued into
2800 // the mnemonic. Check if this is the case, split it and parse the imod op
2801 if (Mnemonic.startswith("cps")) {
2802 // Split out any imod code.
2804 StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2, 2))
2805 .Case("ie", ARM_PROC::IE)
2806 .Case("id", ARM_PROC::ID)
2809 Mnemonic = Mnemonic.slice(0, Mnemonic.size()-2);
2810 ProcessorIMod = IMod;
2817 /// \brief Given a canonical mnemonic, determine if the instruction ever allows
2818 /// inclusion of carry set or predication code operands.
2820 // FIXME: It would be nice to autogen this.
2822 getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
2823 bool &CanAcceptPredicationCode) {
2824 if (Mnemonic == "and" || Mnemonic == "lsl" || Mnemonic == "lsr" ||
2825 Mnemonic == "rrx" || Mnemonic == "ror" || Mnemonic == "sub" ||
2826 Mnemonic == "smull" || Mnemonic == "add" || Mnemonic == "adc" ||
2827 Mnemonic == "mul" || Mnemonic == "bic" || Mnemonic == "asr" ||
2828 Mnemonic == "umlal" || Mnemonic == "orr" || Mnemonic == "mvn" ||
2829 Mnemonic == "rsb" || Mnemonic == "rsc" || Mnemonic == "orn" ||
2830 Mnemonic == "sbc" || Mnemonic == "mla" || Mnemonic == "umull" ||
2831 Mnemonic == "eor" || Mnemonic == "smlal" || Mnemonic == "neg" ||
2832 // FIXME: We need a better way. This really confused Thumb2
2833 // parsing for 'mov'.
2834 (Mnemonic == "mov" && !isThumbOne())) {
2835 CanAcceptCarrySet = true;
2837 CanAcceptCarrySet = false;
2840 if (Mnemonic == "cbnz" || Mnemonic == "setend" || Mnemonic == "dmb" ||
2841 Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
2842 Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
2843 Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
2844 Mnemonic == "dsb" || Mnemonic == "isb" || Mnemonic == "clrex" ||
2845 Mnemonic == "setend" ||
2846 (Mnemonic == "nop" && isThumbOne()) ||
2847 ((Mnemonic == "pld" || Mnemonic == "pli") && !isThumb()) ||
2848 ((Mnemonic.startswith("rfe") || Mnemonic.startswith("srs"))
2850 Mnemonic.startswith("cps") || (Mnemonic == "movs" && isThumb())) {
2851 CanAcceptPredicationCode = false;
2853 CanAcceptPredicationCode = true;
2857 if (Mnemonic == "bkpt" || Mnemonic == "mcr" || Mnemonic == "mcrr" ||
2858 Mnemonic == "mrc" || Mnemonic == "mrrc" || Mnemonic == "cdp")
2859 CanAcceptPredicationCode = false;
2862 bool ARMAsmParser::shouldOmitCCOutOperand(StringRef Mnemonic,
2863 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2865 // The 'mov' mnemonic is special. One variant has a cc_out operand, while
2866 // another does not. Specifically, the MOVW instruction does not. So we
2867 // special case it here and remove the defaulted (non-setting) cc_out
2868 // operand if that's the instruction we're trying to match.
2870 // We do this as post-processing of the explicit operands rather than just
2871 // conditionally adding the cc_out in the first place because we need
2872 // to check the type of the parsed immediate operand.
2873 if (Mnemonic == "mov" && Operands.size() > 4 &&
2874 !static_cast<ARMOperand*>(Operands[4])->isARMSOImm() &&
2875 static_cast<ARMOperand*>(Operands[4])->isImm0_65535Expr() &&
2876 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
2879 // Register-register 'add' for thumb does not have a cc_out operand
2880 // when there are only two register operands.
2881 if (isThumb() && Mnemonic == "add" && Operands.size() == 5 &&
2882 static_cast<ARMOperand*>(Operands[3])->isReg() &&
2883 static_cast<ARMOperand*>(Operands[4])->isReg() &&
2884 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
2890 /// Parse an arm instruction mnemonic followed by its operands.
2891 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
2892 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2893 // Create the leading tokens for the mnemonic, split by '.' characters.
2894 size_t Start = 0, Next = Name.find('.');
2895 StringRef Mnemonic = Name.slice(Start, Next);
2897 // Split out the predication code and carry setting flag from the mnemonic.
2898 unsigned PredicationCode;
2899 unsigned ProcessorIMod;
2901 Mnemonic = splitMnemonic(Mnemonic, PredicationCode, CarrySetting,
2904 Operands.push_back(ARMOperand::CreateToken(Mnemonic, NameLoc));
2906 // FIXME: This is all a pretty gross hack. We should automatically handle
2907 // optional operands like this via tblgen.
2909 // Next, add the CCOut and ConditionCode operands, if needed.
2911 // For mnemonics which can ever incorporate a carry setting bit or predication
2912 // code, our matching model involves us always generating CCOut and
2913 // ConditionCode operands to match the mnemonic "as written" and then we let
2914 // the matcher deal with finding the right instruction or generating an
2915 // appropriate error.
2916 bool CanAcceptCarrySet, CanAcceptPredicationCode;
2917 getMnemonicAcceptInfo(Mnemonic, CanAcceptCarrySet, CanAcceptPredicationCode);
2919 // If we had a carry-set on an instruction that can't do that, issue an
2921 if (!CanAcceptCarrySet && CarrySetting) {
2922 Parser.EatToEndOfStatement();
2923 return Error(NameLoc, "instruction '" + Mnemonic +
2924 "' can not set flags, but 's' suffix specified");
2926 // If we had a predication code on an instruction that can't do that, issue an
2928 if (!CanAcceptPredicationCode && PredicationCode != ARMCC::AL) {
2929 Parser.EatToEndOfStatement();
2930 return Error(NameLoc, "instruction '" + Mnemonic +
2931 "' is not predicable, but condition code specified");
2934 // Add the carry setting operand, if necessary.
2936 // FIXME: It would be awesome if we could somehow invent a location such that
2937 // match errors on this operand would print a nice diagnostic about how the
2938 // 's' character in the mnemonic resulted in a CCOut operand.
2939 if (CanAcceptCarrySet)
2940 Operands.push_back(ARMOperand::CreateCCOut(CarrySetting ? ARM::CPSR : 0,
2943 // Add the predication code operand, if necessary.
2944 if (CanAcceptPredicationCode) {
2945 Operands.push_back(ARMOperand::CreateCondCode(
2946 ARMCC::CondCodes(PredicationCode), NameLoc));
2949 // Add the processor imod operand, if necessary.
2950 if (ProcessorIMod) {
2951 Operands.push_back(ARMOperand::CreateImm(
2952 MCConstantExpr::Create(ProcessorIMod, getContext()),
2955 // This mnemonic can't ever accept a imod, but the user wrote
2956 // one (or misspelled another mnemonic).
2958 // FIXME: Issue a nice error.
2961 // Add the remaining tokens in the mnemonic.
2962 while (Next != StringRef::npos) {
2964 Next = Name.find('.', Start + 1);
2965 StringRef ExtraToken = Name.slice(Start, Next);
2967 Operands.push_back(ARMOperand::CreateToken(ExtraToken, NameLoc));
2970 // Read the remaining operands.
2971 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2972 // Read the first operand.
2973 if (parseOperand(Operands, Mnemonic)) {
2974 Parser.EatToEndOfStatement();
2978 while (getLexer().is(AsmToken::Comma)) {
2979 Parser.Lex(); // Eat the comma.
2981 // Parse and remember the operand.
2982 if (parseOperand(Operands, Mnemonic)) {
2983 Parser.EatToEndOfStatement();
2989 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2990 Parser.EatToEndOfStatement();
2991 return TokError("unexpected token in argument list");
2994 Parser.Lex(); // Consume the EndOfStatement
2996 // Some instructions, mostly Thumb, have forms for the same mnemonic that
2997 // do and don't have a cc_out optional-def operand. With some spot-checks
2998 // of the operand list, we can figure out which variant we're trying to
2999 // parse and adjust accordingly before actually matching. Reason number
3000 // #317 the table driven matcher doesn't fit well with the ARM instruction
3002 if (shouldOmitCCOutOperand(Mnemonic, Operands)) {
3003 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
3004 Operands.erase(Operands.begin() + 1);
3008 // ARM mode 'blx' need special handling, as the register operand version
3009 // is predicable, but the label operand version is not. So, we can't rely
3010 // on the Mnemonic based checking to correctly figure out when to put
3011 // a CondCode operand in the list. If we're trying to match the label
3012 // version, remove the CondCode operand here.
3013 if (!isThumb() && Mnemonic == "blx" && Operands.size() == 3 &&
3014 static_cast<ARMOperand*>(Operands[2])->isImm()) {
3015 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
3016 Operands.erase(Operands.begin() + 1);
3020 // The vector-compare-to-zero instructions have a literal token "#0" at
3021 // the end that comes to here as an immediate operand. Convert it to a
3022 // token to play nicely with the matcher.
3023 if ((Mnemonic == "vceq" || Mnemonic == "vcge" || Mnemonic == "vcgt" ||
3024 Mnemonic == "vcle" || Mnemonic == "vclt") && Operands.size() == 6 &&
3025 static_cast<ARMOperand*>(Operands[5])->isImm()) {
3026 ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
3027 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
3028 if (CE && CE->getValue() == 0) {
3029 Operands.erase(Operands.begin() + 5);
3030 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
3034 // Similarly, the Thumb1 "RSB" instruction has a literal "#0" on the
3035 // end. Convert it to a token here.
3036 if (Mnemonic == "rsb" && isThumb() && Operands.size() == 6 &&
3037 static_cast<ARMOperand*>(Operands[5])->isImm()) {
3038 ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
3039 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
3040 if (CE && CE->getValue() == 0) {
3041 Operands.erase(Operands.begin() + 5);
3042 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
3050 // Validate context-sensitive operand constraints.
3052 // return 'true' if register list contains non-low GPR registers,
3053 // 'false' otherwise. If Reg is in the register list or is HiReg, set
3054 // 'containsReg' to true.
3055 static bool checkLowRegisterList(MCInst Inst, unsigned OpNo, unsigned Reg,
3056 unsigned HiReg, bool &containsReg) {
3057 containsReg = false;
3058 for (unsigned i = OpNo; i < Inst.getNumOperands(); ++i) {
3059 unsigned OpReg = Inst.getOperand(i).getReg();
3062 // Anything other than a low register isn't legal here.
3063 if (!isARMLowRegister(OpReg) && (!HiReg || OpReg != HiReg))
3069 // FIXME: We would really like to be able to tablegen'erate this.
3071 validateInstruction(MCInst &Inst,
3072 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3073 switch (Inst.getOpcode()) {
3076 case ARM::LDRD_POST:
3078 // Rt2 must be Rt + 1.
3079 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
3080 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3082 return Error(Operands[3]->getStartLoc(),
3083 "destination operands must be sequential");
3087 // Rt2 must be Rt + 1.
3088 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
3089 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3091 return Error(Operands[3]->getStartLoc(),
3092 "source operands must be sequential");
3096 case ARM::STRD_POST:
3098 // Rt2 must be Rt + 1.
3099 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3100 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(2).getReg());
3102 return Error(Operands[3]->getStartLoc(),
3103 "source operands must be sequential");
3108 // width must be in range [1, 32-lsb]
3109 unsigned lsb = Inst.getOperand(2).getImm();
3110 unsigned widthm1 = Inst.getOperand(3).getImm();
3111 if (widthm1 >= 32 - lsb)
3112 return Error(Operands[5]->getStartLoc(),
3113 "bitfield width must be in range [1,32-lsb]");
3117 // Thumb LDM instructions are writeback iff the base register is not
3118 // in the register list.
3119 unsigned Rn = Inst.getOperand(0).getReg();
3120 bool hasWritebackToken =
3121 (static_cast<ARMOperand*>(Operands[3])->isToken() &&
3122 static_cast<ARMOperand*>(Operands[3])->getToken() == "!");
3123 bool listContainsBase;
3124 if (checkLowRegisterList(Inst, 3, Rn, 0, listContainsBase))
3125 return Error(Operands[3 + hasWritebackToken]->getStartLoc(),
3126 "registers must be in range r0-r7");
3127 // If we should have writeback, then there should be a '!' token.
3128 if (!listContainsBase && !hasWritebackToken)
3129 return Error(Operands[2]->getStartLoc(),
3130 "writeback operator '!' expected");
3131 // Likewise, if we should not have writeback, there must not be a '!'
3132 if (listContainsBase && hasWritebackToken)
3133 return Error(Operands[3]->getStartLoc(),
3134 "writeback operator '!' not allowed when base register "
3135 "in register list");
3140 bool listContainsBase;
3141 if (checkLowRegisterList(Inst, 3, 0, ARM::PC, listContainsBase))
3142 return Error(Operands[2]->getStartLoc(),
3143 "registers must be in range r0-r7 or pc");
3147 bool listContainsBase;
3148 if (checkLowRegisterList(Inst, 3, 0, ARM::LR, listContainsBase))
3149 return Error(Operands[2]->getStartLoc(),
3150 "registers must be in range r0-r7 or lr");
3153 case ARM::tSTMIA_UPD: {
3154 bool listContainsBase;
3155 if (checkLowRegisterList(Inst, 4, 0, 0, listContainsBase))
3156 return Error(Operands[4]->getStartLoc(),
3157 "registers must be in range r0-r7");
3166 processInstruction(MCInst &Inst,
3167 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3168 switch (Inst.getOpcode()) {
3169 case ARM::LDMIA_UPD:
3170 // If this is a load of a single register via a 'pop', then we should use
3171 // a post-indexed LDR instruction instead, per the ARM ARM.
3172 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "pop" &&
3173 Inst.getNumOperands() == 5) {
3175 TmpInst.setOpcode(ARM::LDR_POST_IMM);
3176 TmpInst.addOperand(Inst.getOperand(4)); // Rt
3177 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
3178 TmpInst.addOperand(Inst.getOperand(1)); // Rn
3179 TmpInst.addOperand(MCOperand::CreateReg(0)); // am2offset
3180 TmpInst.addOperand(MCOperand::CreateImm(4));
3181 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
3182 TmpInst.addOperand(Inst.getOperand(3));
3186 case ARM::STMDB_UPD:
3187 // If this is a store of a single register via a 'push', then we should use
3188 // a pre-indexed STR instruction instead, per the ARM ARM.
3189 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "push" &&
3190 Inst.getNumOperands() == 5) {
3192 TmpInst.setOpcode(ARM::STR_PRE_IMM);
3193 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
3194 TmpInst.addOperand(Inst.getOperand(4)); // Rt
3195 TmpInst.addOperand(Inst.getOperand(1)); // addrmode_imm12
3196 TmpInst.addOperand(MCOperand::CreateImm(-4));
3197 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
3198 TmpInst.addOperand(Inst.getOperand(3));
3203 // If the immediate is in the range 0-7, we really wanted tADDi3.
3204 if (Inst.getOperand(3).getImm() < 8)
3205 Inst.setOpcode(ARM::tADDi3);
3208 // If the conditional is AL, we really want tB.
3209 if (Inst.getOperand(1).getImm() == ARMCC::AL)
3210 Inst.setOpcode(ARM::tB);
3215 // FIXME: We would really prefer to have MCInstrInfo (the wrapper around
3216 // the ARMInsts array) instead. Getting that here requires awkward
3217 // API changes, though. Better way?
3219 extern MCInstrDesc ARMInsts[];
3221 static MCInstrDesc &getInstDesc(unsigned Opcode) {
3222 return ARMInsts[Opcode];
3225 unsigned ARMAsmParser::checkTargetMatchPredicate(MCInst &Inst) {
3226 // 16-bit thumb arithmetic instructions either require or preclude the 'S'
3227 // suffix depending on whether they're in an IT block or not.
3228 unsigned Opc = Inst.getOpcode();
3229 MCInstrDesc &MCID = getInstDesc(Opc);
3230 if (MCID.TSFlags & ARMII::ThumbArithFlagSetting) {
3231 assert(MCID.hasOptionalDef() &&
3232 "optionally flag setting instruction missing optional def operand");
3233 assert(MCID.NumOperands == Inst.getNumOperands() &&
3234 "operand count mismatch!");
3235 // Find the optional-def operand (cc_out).
3238 !MCID.OpInfo[OpNo].isOptionalDef() && OpNo < MCID.NumOperands;
3241 // If we're parsing Thumb1, reject it completely.
3242 if (isThumbOne() && Inst.getOperand(OpNo).getReg() != ARM::CPSR)
3243 return Match_MnemonicFail;
3244 // If we're parsing Thumb2, which form is legal depends on whether we're
3246 // FIXME: We don't yet do IT blocks, so just always consider it to be
3247 // that we aren't in one until we do.
3248 if (isThumbTwo() && Inst.getOperand(OpNo).getReg() != ARM::CPSR)
3249 return Match_RequiresITBlock;
3251 // Some high-register supporting Thumb1 encodings only allow both registers
3252 // to be from r0-r7 when in Thumb2.
3253 else if (Opc == ARM::tADDhirr && isThumbOne() &&
3254 isARMLowRegister(Inst.getOperand(1).getReg()) &&
3255 isARMLowRegister(Inst.getOperand(2).getReg()))
3256 return Match_RequiresThumb2;
3257 // Others only require ARMv6 or later.
3258 else if (Opc == ARM::tMOVr && isThumbOne() && !hasV6Ops() &&
3259 isARMLowRegister(Inst.getOperand(0).getReg()) &&
3260 isARMLowRegister(Inst.getOperand(1).getReg()))
3261 return Match_RequiresV6;
3262 return Match_Success;
3266 MatchAndEmitInstruction(SMLoc IDLoc,
3267 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
3271 unsigned MatchResult;
3272 MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo);
3273 switch (MatchResult) {
3276 // Context sensitive operand constraints aren't handled by the matcher,
3277 // so check them here.
3278 if (validateInstruction(Inst, Operands))
3281 // Some instructions need post-processing to, for example, tweak which
3282 // encoding is selected.
3283 processInstruction(Inst, Operands);
3285 Out.EmitInstruction(Inst);
3287 case Match_MissingFeature:
3288 Error(IDLoc, "instruction requires a CPU feature not currently enabled");
3290 case Match_InvalidOperand: {
3291 SMLoc ErrorLoc = IDLoc;
3292 if (ErrorInfo != ~0U) {
3293 if (ErrorInfo >= Operands.size())
3294 return Error(IDLoc, "too few operands for instruction");
3296 ErrorLoc = ((ARMOperand*)Operands[ErrorInfo])->getStartLoc();
3297 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
3300 return Error(ErrorLoc, "invalid operand for instruction");
3302 case Match_MnemonicFail:
3303 return Error(IDLoc, "invalid instruction");
3304 case Match_ConversionFail:
3305 // The converter function will have already emited a diagnostic.
3307 case Match_RequiresITBlock:
3308 return Error(IDLoc, "instruction only valid inside IT block");
3309 case Match_RequiresV6:
3310 return Error(IDLoc, "instruction variant requires ARMv6 or later");
3311 case Match_RequiresThumb2:
3312 return Error(IDLoc, "instruction variant requires Thumb2");
3315 llvm_unreachable("Implement any new match types added!");
3319 /// parseDirective parses the arm specific directives
3320 bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
3321 StringRef IDVal = DirectiveID.getIdentifier();
3322 if (IDVal == ".word")
3323 return parseDirectiveWord(4, DirectiveID.getLoc());
3324 else if (IDVal == ".thumb")
3325 return parseDirectiveThumb(DirectiveID.getLoc());
3326 else if (IDVal == ".thumb_func")
3327 return parseDirectiveThumbFunc(DirectiveID.getLoc());
3328 else if (IDVal == ".code")
3329 return parseDirectiveCode(DirectiveID.getLoc());
3330 else if (IDVal == ".syntax")
3331 return parseDirectiveSyntax(DirectiveID.getLoc());
3335 /// parseDirectiveWord
3336 /// ::= .word [ expression (, expression)* ]
3337 bool ARMAsmParser::parseDirectiveWord(unsigned Size, SMLoc L) {
3338 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3340 const MCExpr *Value;
3341 if (getParser().ParseExpression(Value))
3344 getParser().getStreamer().EmitValue(Value, Size, 0/*addrspace*/);
3346 if (getLexer().is(AsmToken::EndOfStatement))
3349 // FIXME: Improve diagnostic.
3350 if (getLexer().isNot(AsmToken::Comma))
3351 return Error(L, "unexpected token in directive");
3360 /// parseDirectiveThumb
3362 bool ARMAsmParser::parseDirectiveThumb(SMLoc L) {
3363 if (getLexer().isNot(AsmToken::EndOfStatement))
3364 return Error(L, "unexpected token in directive");
3367 // TODO: set thumb mode
3368 // TODO: tell the MC streamer the mode
3369 // getParser().getStreamer().Emit???();
3373 /// parseDirectiveThumbFunc
3374 /// ::= .thumbfunc symbol_name
3375 bool ARMAsmParser::parseDirectiveThumbFunc(SMLoc L) {
3376 const MCAsmInfo &MAI = getParser().getStreamer().getContext().getAsmInfo();
3377 bool isMachO = MAI.hasSubsectionsViaSymbols();
3380 // Darwin asm has function name after .thumb_func direction
3383 const AsmToken &Tok = Parser.getTok();
3384 if (Tok.isNot(AsmToken::Identifier) && Tok.isNot(AsmToken::String))
3385 return Error(L, "unexpected token in .thumb_func directive");
3386 Name = Tok.getString();
3387 Parser.Lex(); // Consume the identifier token.
3390 if (getLexer().isNot(AsmToken::EndOfStatement))
3391 return Error(L, "unexpected token in directive");
3394 // FIXME: assuming function name will be the line following .thumb_func
3396 Name = Parser.getTok().getString();
3399 // Mark symbol as a thumb symbol.
3400 MCSymbol *Func = getParser().getContext().GetOrCreateSymbol(Name);
3401 getParser().getStreamer().EmitThumbFunc(Func);
3405 /// parseDirectiveSyntax
3406 /// ::= .syntax unified | divided
3407 bool ARMAsmParser::parseDirectiveSyntax(SMLoc L) {
3408 const AsmToken &Tok = Parser.getTok();
3409 if (Tok.isNot(AsmToken::Identifier))
3410 return Error(L, "unexpected token in .syntax directive");
3411 StringRef Mode = Tok.getString();
3412 if (Mode == "unified" || Mode == "UNIFIED")
3414 else if (Mode == "divided" || Mode == "DIVIDED")
3415 return Error(L, "'.syntax divided' arm asssembly not supported");
3417 return Error(L, "unrecognized syntax mode in .syntax directive");
3419 if (getLexer().isNot(AsmToken::EndOfStatement))
3420 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
3423 // TODO tell the MC streamer the mode
3424 // getParser().getStreamer().Emit???();
3428 /// parseDirectiveCode
3429 /// ::= .code 16 | 32
3430 bool ARMAsmParser::parseDirectiveCode(SMLoc L) {
3431 const AsmToken &Tok = Parser.getTok();
3432 if (Tok.isNot(AsmToken::Integer))
3433 return Error(L, "unexpected token in .code directive");
3434 int64_t Val = Parser.getTok().getIntVal();
3440 return Error(L, "invalid operand to .code directive");
3442 if (getLexer().isNot(AsmToken::EndOfStatement))
3443 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
3449 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code16);
3454 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code32);
3461 extern "C" void LLVMInitializeARMAsmLexer();
3463 /// Force static initialization.
3464 extern "C" void LLVMInitializeARMAsmParser() {
3465 RegisterMCAsmParser<ARMAsmParser> X(TheARMTarget);
3466 RegisterMCAsmParser<ARMAsmParser> Y(TheThumbTarget);
3467 LLVMInitializeARMAsmLexer();
3470 #define GET_REGISTER_MATCHER
3471 #define GET_MATCHER_IMPLEMENTATION
3472 #include "ARMGenAsmMatcher.inc"