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/MathExtras.h"
26 #include "llvm/Support/SourceMgr.h"
27 #include "llvm/Support/TargetRegistry.h"
28 #include "llvm/Support/raw_ostream.h"
29 #include "llvm/ADT/BitVector.h"
30 #include "llvm/ADT/OwningPtr.h"
31 #include "llvm/ADT/STLExtras.h"
32 #include "llvm/ADT/SmallVector.h"
33 #include "llvm/ADT/StringExtras.h"
34 #include "llvm/ADT/StringSwitch.h"
35 #include "llvm/ADT/Twine.h"
43 class ARMAsmParser : public MCTargetAsmParser {
48 ARMCC::CondCodes Cond; // Condition for IT block.
49 unsigned Mask:4; // Condition mask for instructions.
50 // Starting at first 1 (from lsb).
51 // '1' condition as indicated in IT.
52 // '0' inverse of condition (else).
53 // Count of instructions in IT block is
54 // 4 - trailingzeroes(mask)
56 bool FirstCond; // Explicit flag for when we're parsing the
57 // First instruction in the IT block. It's
58 // implied in the mask, so needs special
61 unsigned CurPosition; // Current position in parsing of IT
62 // block. In range [0,3]. Initialized
63 // according to count of instructions in block.
64 // ~0U if no active IT block.
66 bool inITBlock() { return ITState.CurPosition != ~0U;}
67 void forwardITPosition() {
68 if (!inITBlock()) return;
69 // Move to the next instruction in the IT block, if there is one. If not,
70 // mark the block as done.
71 unsigned TZ = CountTrailingZeros_32(ITState.Mask);
72 if (++ITState.CurPosition == 5 - TZ)
73 ITState.CurPosition = ~0U; // Done with the IT block after this.
77 MCAsmParser &getParser() const { return Parser; }
78 MCAsmLexer &getLexer() const { return Parser.getLexer(); }
80 void Warning(SMLoc L, const Twine &Msg) { Parser.Warning(L, Msg); }
81 bool Error(SMLoc L, const Twine &Msg) { return Parser.Error(L, Msg); }
83 int tryParseRegister();
84 bool tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &);
85 int tryParseShiftRegister(SmallVectorImpl<MCParsedAsmOperand*> &);
86 bool parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &);
87 bool parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &);
88 bool parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &, StringRef Mnemonic);
89 bool parsePrefix(ARMMCExpr::VariantKind &RefKind);
90 const MCExpr *applyPrefixToExpr(const MCExpr *E,
91 MCSymbolRefExpr::VariantKind Variant);
94 bool parseMemRegOffsetShift(ARM_AM::ShiftOpc &ShiftType,
95 unsigned &ShiftAmount);
96 bool parseDirectiveWord(unsigned Size, SMLoc L);
97 bool parseDirectiveThumb(SMLoc L);
98 bool parseDirectiveThumbFunc(SMLoc L);
99 bool parseDirectiveCode(SMLoc L);
100 bool parseDirectiveSyntax(SMLoc L);
102 StringRef splitMnemonic(StringRef Mnemonic, unsigned &PredicationCode,
103 bool &CarrySetting, unsigned &ProcessorIMod,
105 void getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
106 bool &CanAcceptPredicationCode);
108 bool isThumb() const {
109 // FIXME: Can tablegen auto-generate this?
110 return (STI.getFeatureBits() & ARM::ModeThumb) != 0;
112 bool isThumbOne() const {
113 return isThumb() && (STI.getFeatureBits() & ARM::FeatureThumb2) == 0;
115 bool isThumbTwo() const {
116 return isThumb() && (STI.getFeatureBits() & ARM::FeatureThumb2);
118 bool hasV6Ops() const {
119 return STI.getFeatureBits() & ARM::HasV6Ops;
122 unsigned FB = ComputeAvailableFeatures(STI.ToggleFeature(ARM::ModeThumb));
123 setAvailableFeatures(FB);
126 /// @name Auto-generated Match Functions
129 #define GET_ASSEMBLER_HEADER
130 #include "ARMGenAsmMatcher.inc"
134 OperandMatchResultTy parseITCondCode(SmallVectorImpl<MCParsedAsmOperand*>&);
135 OperandMatchResultTy parseCoprocNumOperand(
136 SmallVectorImpl<MCParsedAsmOperand*>&);
137 OperandMatchResultTy parseCoprocRegOperand(
138 SmallVectorImpl<MCParsedAsmOperand*>&);
139 OperandMatchResultTy parseMemBarrierOptOperand(
140 SmallVectorImpl<MCParsedAsmOperand*>&);
141 OperandMatchResultTy parseProcIFlagsOperand(
142 SmallVectorImpl<MCParsedAsmOperand*>&);
143 OperandMatchResultTy parseMSRMaskOperand(
144 SmallVectorImpl<MCParsedAsmOperand*>&);
145 OperandMatchResultTy parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &O,
146 StringRef Op, int Low, int High);
147 OperandMatchResultTy parsePKHLSLImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
148 return parsePKHImm(O, "lsl", 0, 31);
150 OperandMatchResultTy parsePKHASRImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
151 return parsePKHImm(O, "asr", 1, 32);
153 OperandMatchResultTy parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*>&);
154 OperandMatchResultTy parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*>&);
155 OperandMatchResultTy parseRotImm(SmallVectorImpl<MCParsedAsmOperand*>&);
156 OperandMatchResultTy parseBitfield(SmallVectorImpl<MCParsedAsmOperand*>&);
157 OperandMatchResultTy parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*>&);
158 OperandMatchResultTy parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*>&);
160 // Asm Match Converter Methods
161 bool cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
162 const SmallVectorImpl<MCParsedAsmOperand*> &);
163 bool cvtLdWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
164 const SmallVectorImpl<MCParsedAsmOperand*> &);
165 bool cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
166 const SmallVectorImpl<MCParsedAsmOperand*> &);
167 bool cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
168 const SmallVectorImpl<MCParsedAsmOperand*> &);
169 bool cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
170 const SmallVectorImpl<MCParsedAsmOperand*> &);
171 bool cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
172 const SmallVectorImpl<MCParsedAsmOperand*> &);
173 bool cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
174 const SmallVectorImpl<MCParsedAsmOperand*> &);
175 bool cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
176 const SmallVectorImpl<MCParsedAsmOperand*> &);
177 bool cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
178 const SmallVectorImpl<MCParsedAsmOperand*> &);
179 bool cvtLdrdPre(MCInst &Inst, unsigned Opcode,
180 const SmallVectorImpl<MCParsedAsmOperand*> &);
181 bool cvtStrdPre(MCInst &Inst, unsigned Opcode,
182 const SmallVectorImpl<MCParsedAsmOperand*> &);
183 bool cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
184 const SmallVectorImpl<MCParsedAsmOperand*> &);
185 bool cvtThumbMultiply(MCInst &Inst, unsigned Opcode,
186 const SmallVectorImpl<MCParsedAsmOperand*> &);
188 bool validateInstruction(MCInst &Inst,
189 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
190 void processInstruction(MCInst &Inst,
191 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
192 bool shouldOmitCCOutOperand(StringRef Mnemonic,
193 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
196 enum ARMMatchResultTy {
197 Match_RequiresITBlock = FIRST_TARGET_MATCH_RESULT_TY,
198 Match_RequiresNotITBlock,
203 ARMAsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser)
204 : MCTargetAsmParser(), STI(_STI), Parser(_Parser) {
205 MCAsmParserExtension::Initialize(_Parser);
207 // Initialize the set of available features.
208 setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
210 // Not in an ITBlock to start with.
211 ITState.CurPosition = ~0U;
214 // Implementation of the MCTargetAsmParser interface:
215 bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc);
216 bool ParseInstruction(StringRef Name, SMLoc NameLoc,
217 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
218 bool ParseDirective(AsmToken DirectiveID);
220 unsigned checkTargetMatchPredicate(MCInst &Inst);
222 bool MatchAndEmitInstruction(SMLoc IDLoc,
223 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
226 } // end anonymous namespace
230 /// ARMOperand - Instances of this class represent a parsed ARM machine
232 class ARMOperand : public MCParsedAsmOperand {
257 SMLoc StartLoc, EndLoc;
258 SmallVector<unsigned, 8> Registers;
262 ARMCC::CondCodes Val;
278 ARM_PROC::IFlags Val;
298 /// Combined record for all forms of ARM address expressions.
301 // Offset is in OffsetReg or OffsetImm. If both are zero, no offset
303 const MCConstantExpr *OffsetImm; // Offset immediate value
304 unsigned OffsetRegNum; // Offset register num, when OffsetImm == NULL
305 ARM_AM::ShiftOpc ShiftType; // Shift type for OffsetReg
306 unsigned ShiftImm; // shift for OffsetReg.
307 unsigned isNegative : 1; // Negated OffsetReg? (~'U' bit)
313 ARM_AM::ShiftOpc ShiftTy;
322 ARM_AM::ShiftOpc ShiftTy;
328 ARM_AM::ShiftOpc ShiftTy;
341 ARMOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {}
343 ARMOperand(const ARMOperand &o) : MCParsedAsmOperand() {
345 StartLoc = o.StartLoc;
362 case DPRRegisterList:
363 case SPRRegisterList:
364 Registers = o.Registers;
379 case PostIndexRegister:
380 PostIdxReg = o.PostIdxReg;
388 case ShifterImmediate:
389 ShifterImm = o.ShifterImm;
391 case ShiftedRegister:
392 RegShiftedReg = o.RegShiftedReg;
394 case ShiftedImmediate:
395 RegShiftedImm = o.RegShiftedImm;
397 case RotateImmediate:
400 case BitfieldDescriptor:
401 Bitfield = o.Bitfield;
406 /// getStartLoc - Get the location of the first token of this operand.
407 SMLoc getStartLoc() const { return StartLoc; }
408 /// getEndLoc - Get the location of the last token of this operand.
409 SMLoc getEndLoc() const { return EndLoc; }
411 ARMCC::CondCodes getCondCode() const {
412 assert(Kind == CondCode && "Invalid access!");
416 unsigned getCoproc() const {
417 assert((Kind == CoprocNum || Kind == CoprocReg) && "Invalid access!");
421 StringRef getToken() const {
422 assert(Kind == Token && "Invalid access!");
423 return StringRef(Tok.Data, Tok.Length);
426 unsigned getReg() const {
427 assert((Kind == Register || Kind == CCOut) && "Invalid access!");
431 const SmallVectorImpl<unsigned> &getRegList() const {
432 assert((Kind == RegisterList || Kind == DPRRegisterList ||
433 Kind == SPRRegisterList) && "Invalid access!");
437 const MCExpr *getImm() const {
438 assert(Kind == Immediate && "Invalid access!");
442 ARM_MB::MemBOpt getMemBarrierOpt() const {
443 assert(Kind == MemBarrierOpt && "Invalid access!");
447 ARM_PROC::IFlags getProcIFlags() const {
448 assert(Kind == ProcIFlags && "Invalid access!");
452 unsigned getMSRMask() const {
453 assert(Kind == MSRMask && "Invalid access!");
457 bool isCoprocNum() const { return Kind == CoprocNum; }
458 bool isCoprocReg() const { return Kind == CoprocReg; }
459 bool isCondCode() const { return Kind == CondCode; }
460 bool isCCOut() const { return Kind == CCOut; }
461 bool isITMask() const { return Kind == ITCondMask; }
462 bool isITCondCode() const { return Kind == CondCode; }
463 bool isImm() const { return Kind == Immediate; }
464 bool isImm0_1020s4() const {
465 if (Kind != Immediate)
467 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
468 if (!CE) return false;
469 int64_t Value = CE->getValue();
470 return ((Value & 3) == 0) && Value >= 0 && Value <= 1020;
472 bool isImm0_508s4() const {
473 if (Kind != Immediate)
475 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
476 if (!CE) return false;
477 int64_t Value = CE->getValue();
478 return ((Value & 3) == 0) && Value >= 0 && Value <= 508;
480 bool isImm0_255() const {
481 if (Kind != Immediate)
483 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
484 if (!CE) return false;
485 int64_t Value = CE->getValue();
486 return Value >= 0 && Value < 256;
488 bool isImm0_7() const {
489 if (Kind != Immediate)
491 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
492 if (!CE) return false;
493 int64_t Value = CE->getValue();
494 return Value >= 0 && Value < 8;
496 bool isImm0_15() const {
497 if (Kind != Immediate)
499 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
500 if (!CE) return false;
501 int64_t Value = CE->getValue();
502 return Value >= 0 && Value < 16;
504 bool isImm0_31() const {
505 if (Kind != Immediate)
507 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
508 if (!CE) return false;
509 int64_t Value = CE->getValue();
510 return Value >= 0 && Value < 32;
512 bool isImm1_16() const {
513 if (Kind != Immediate)
515 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
516 if (!CE) return false;
517 int64_t Value = CE->getValue();
518 return Value > 0 && Value < 17;
520 bool isImm1_32() const {
521 if (Kind != Immediate)
523 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
524 if (!CE) return false;
525 int64_t Value = CE->getValue();
526 return Value > 0 && Value < 33;
528 bool isImm0_65535() const {
529 if (Kind != Immediate)
531 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
532 if (!CE) return false;
533 int64_t Value = CE->getValue();
534 return Value >= 0 && Value < 65536;
536 bool isImm0_65535Expr() const {
537 if (Kind != Immediate)
539 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
540 // If it's not a constant expression, it'll generate a fixup and be
542 if (!CE) return true;
543 int64_t Value = CE->getValue();
544 return Value >= 0 && Value < 65536;
546 bool isImm24bit() const {
547 if (Kind != Immediate)
549 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
550 if (!CE) return false;
551 int64_t Value = CE->getValue();
552 return Value >= 0 && Value <= 0xffffff;
554 bool isImmThumbSR() const {
555 if (Kind != Immediate)
557 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
558 if (!CE) return false;
559 int64_t Value = CE->getValue();
560 return Value > 0 && Value < 33;
562 bool isPKHLSLImm() const {
563 if (Kind != Immediate)
565 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
566 if (!CE) return false;
567 int64_t Value = CE->getValue();
568 return Value >= 0 && Value < 32;
570 bool isPKHASRImm() const {
571 if (Kind != Immediate)
573 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
574 if (!CE) return false;
575 int64_t Value = CE->getValue();
576 return Value > 0 && Value <= 32;
578 bool isARMSOImm() const {
579 if (Kind != Immediate)
581 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
582 if (!CE) return false;
583 int64_t Value = CE->getValue();
584 return ARM_AM::getSOImmVal(Value) != -1;
586 bool isT2SOImm() const {
587 if (Kind != Immediate)
589 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
590 if (!CE) return false;
591 int64_t Value = CE->getValue();
592 return ARM_AM::getT2SOImmVal(Value) != -1;
594 bool isSetEndImm() const {
595 if (Kind != Immediate)
597 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
598 if (!CE) return false;
599 int64_t Value = CE->getValue();
600 return Value == 1 || Value == 0;
602 bool isReg() const { return Kind == Register; }
603 bool isRegList() const { return Kind == RegisterList; }
604 bool isDPRRegList() const { return Kind == DPRRegisterList; }
605 bool isSPRRegList() const { return Kind == SPRRegisterList; }
606 bool isToken() const { return Kind == Token; }
607 bool isMemBarrierOpt() const { return Kind == MemBarrierOpt; }
608 bool isMemory() const { return Kind == Memory; }
609 bool isShifterImm() const { return Kind == ShifterImmediate; }
610 bool isRegShiftedReg() const { return Kind == ShiftedRegister; }
611 bool isRegShiftedImm() const { return Kind == ShiftedImmediate; }
612 bool isRotImm() const { return Kind == RotateImmediate; }
613 bool isBitfield() const { return Kind == BitfieldDescriptor; }
614 bool isPostIdxRegShifted() const { return Kind == PostIndexRegister; }
615 bool isPostIdxReg() const {
616 return Kind == PostIndexRegister && PostIdxReg.ShiftTy == ARM_AM::no_shift;
618 bool isMemNoOffset() const {
621 // No offset of any kind.
622 return Mem.OffsetRegNum == 0 && Mem.OffsetImm == 0;
624 bool isAddrMode2() const {
627 // Check for register offset.
628 if (Mem.OffsetRegNum) return true;
629 // Immediate offset in range [-4095, 4095].
630 if (!Mem.OffsetImm) return true;
631 int64_t Val = Mem.OffsetImm->getValue();
632 return Val > -4096 && Val < 4096;
634 bool isAM2OffsetImm() const {
635 if (Kind != Immediate)
637 // Immediate offset in range [-4095, 4095].
638 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
639 if (!CE) return false;
640 int64_t Val = CE->getValue();
641 return Val > -4096 && Val < 4096;
643 bool isAddrMode3() const {
646 // No shifts are legal for AM3.
647 if (Mem.ShiftType != ARM_AM::no_shift) return false;
648 // Check for register offset.
649 if (Mem.OffsetRegNum) return true;
650 // Immediate offset in range [-255, 255].
651 if (!Mem.OffsetImm) return true;
652 int64_t Val = Mem.OffsetImm->getValue();
653 return Val > -256 && Val < 256;
655 bool isAM3Offset() const {
656 if (Kind != Immediate && Kind != PostIndexRegister)
658 if (Kind == PostIndexRegister)
659 return PostIdxReg.ShiftTy == ARM_AM::no_shift;
660 // Immediate offset in range [-255, 255].
661 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
662 if (!CE) return false;
663 int64_t Val = CE->getValue();
664 // Special case, #-0 is INT32_MIN.
665 return (Val > -256 && Val < 256) || Val == INT32_MIN;
667 bool isAddrMode5() const {
670 // Check for register offset.
671 if (Mem.OffsetRegNum) return false;
672 // Immediate offset in range [-1020, 1020] and a multiple of 4.
673 if (!Mem.OffsetImm) return true;
674 int64_t Val = Mem.OffsetImm->getValue();
675 return (Val >= -1020 && Val <= 1020 && ((Val & 3) == 0)) ||
678 bool isMemRegOffset() const {
679 if (Kind != Memory || !Mem.OffsetRegNum)
683 bool isMemThumbRR() const {
684 // Thumb reg+reg addressing is simple. Just two registers, a base and
685 // an offset. No shifts, negations or any other complicating factors.
686 if (Kind != Memory || !Mem.OffsetRegNum || Mem.isNegative ||
687 Mem.ShiftType != ARM_AM::no_shift)
689 return isARMLowRegister(Mem.BaseRegNum) &&
690 (!Mem.OffsetRegNum || isARMLowRegister(Mem.OffsetRegNum));
692 bool isMemThumbRIs4() const {
693 if (Kind != Memory || Mem.OffsetRegNum != 0 ||
694 !isARMLowRegister(Mem.BaseRegNum))
696 // Immediate offset, multiple of 4 in range [0, 124].
697 if (!Mem.OffsetImm) return true;
698 int64_t Val = Mem.OffsetImm->getValue();
699 return Val >= 0 && Val <= 124 && (Val % 4) == 0;
701 bool isMemThumbRIs2() const {
702 if (Kind != Memory || Mem.OffsetRegNum != 0 ||
703 !isARMLowRegister(Mem.BaseRegNum))
705 // Immediate offset, multiple of 4 in range [0, 62].
706 if (!Mem.OffsetImm) return true;
707 int64_t Val = Mem.OffsetImm->getValue();
708 return Val >= 0 && Val <= 62 && (Val % 2) == 0;
710 bool isMemThumbRIs1() const {
711 if (Kind != Memory || Mem.OffsetRegNum != 0 ||
712 !isARMLowRegister(Mem.BaseRegNum))
714 // Immediate offset in range [0, 31].
715 if (!Mem.OffsetImm) return true;
716 int64_t Val = Mem.OffsetImm->getValue();
717 return Val >= 0 && Val <= 31;
719 bool isMemThumbSPI() const {
720 if (Kind != Memory || Mem.OffsetRegNum != 0 || Mem.BaseRegNum != ARM::SP)
722 // Immediate offset, multiple of 4 in range [0, 1020].
723 if (!Mem.OffsetImm) return true;
724 int64_t Val = Mem.OffsetImm->getValue();
725 return Val >= 0 && Val <= 1020 && (Val % 4) == 0;
727 bool isMemImm8Offset() const {
728 if (Kind != Memory || Mem.OffsetRegNum != 0)
730 // Immediate offset in range [-255, 255].
731 if (!Mem.OffsetImm) return true;
732 int64_t Val = Mem.OffsetImm->getValue();
733 return Val > -256 && Val < 256;
735 bool isMemNegImm8Offset() const {
736 if (Kind != Memory || Mem.OffsetRegNum != 0)
738 // Immediate offset in range [-255, -1].
739 if (!Mem.OffsetImm) return true;
740 int64_t Val = Mem.OffsetImm->getValue();
741 return Val > -256 && Val < 0;
743 bool isMemUImm12Offset() const {
744 // If we have an immediate that's not a constant, treat it as a label
745 // reference needing a fixup. If it is a constant, it's something else
747 if (Kind == Immediate && !isa<MCConstantExpr>(getImm()))
750 if (Kind != Memory || Mem.OffsetRegNum != 0)
752 // Immediate offset in range [0, 4095].
753 if (!Mem.OffsetImm) return true;
754 int64_t Val = Mem.OffsetImm->getValue();
755 return (Val >= 0 && Val < 4096);
757 bool isMemImm12Offset() const {
758 // If we have an immediate that's not a constant, treat it as a label
759 // reference needing a fixup. If it is a constant, it's something else
761 if (Kind == Immediate && !isa<MCConstantExpr>(getImm()))
764 if (Kind != Memory || Mem.OffsetRegNum != 0)
766 // Immediate offset in range [-4095, 4095].
767 if (!Mem.OffsetImm) return true;
768 int64_t Val = Mem.OffsetImm->getValue();
769 return (Val > -4096 && Val < 4096) || (Val == INT32_MIN);
771 bool isPostIdxImm8() const {
772 if (Kind != Immediate)
774 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
775 if (!CE) return false;
776 int64_t Val = CE->getValue();
777 return (Val > -256 && Val < 256) || (Val == INT32_MIN);
780 bool isMSRMask() const { return Kind == MSRMask; }
781 bool isProcIFlags() const { return Kind == ProcIFlags; }
783 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
784 // Add as immediates when possible. Null MCExpr = 0.
786 Inst.addOperand(MCOperand::CreateImm(0));
787 else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
788 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
790 Inst.addOperand(MCOperand::CreateExpr(Expr));
793 void addCondCodeOperands(MCInst &Inst, unsigned N) const {
794 assert(N == 2 && "Invalid number of operands!");
795 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
796 unsigned RegNum = getCondCode() == ARMCC::AL ? 0: ARM::CPSR;
797 Inst.addOperand(MCOperand::CreateReg(RegNum));
800 void addCoprocNumOperands(MCInst &Inst, unsigned N) const {
801 assert(N == 1 && "Invalid number of operands!");
802 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
805 void addITMaskOperands(MCInst &Inst, unsigned N) const {
806 assert(N == 1 && "Invalid number of operands!");
807 Inst.addOperand(MCOperand::CreateImm(ITMask.Mask));
810 void addITCondCodeOperands(MCInst &Inst, unsigned N) const {
811 assert(N == 1 && "Invalid number of operands!");
812 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
815 void addCoprocRegOperands(MCInst &Inst, unsigned N) const {
816 assert(N == 1 && "Invalid number of operands!");
817 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
820 void addCCOutOperands(MCInst &Inst, unsigned N) const {
821 assert(N == 1 && "Invalid number of operands!");
822 Inst.addOperand(MCOperand::CreateReg(getReg()));
825 void addRegOperands(MCInst &Inst, unsigned N) const {
826 assert(N == 1 && "Invalid number of operands!");
827 Inst.addOperand(MCOperand::CreateReg(getReg()));
830 void addRegShiftedRegOperands(MCInst &Inst, unsigned N) const {
831 assert(N == 3 && "Invalid number of operands!");
832 assert(isRegShiftedReg() && "addRegShiftedRegOperands() on non RegShiftedReg!");
833 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.SrcReg));
834 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.ShiftReg));
835 Inst.addOperand(MCOperand::CreateImm(
836 ARM_AM::getSORegOpc(RegShiftedReg.ShiftTy, RegShiftedReg.ShiftImm)));
839 void addRegShiftedImmOperands(MCInst &Inst, unsigned N) const {
840 assert(N == 2 && "Invalid number of operands!");
841 assert(isRegShiftedImm() && "addRegShiftedImmOperands() on non RegShiftedImm!");
842 Inst.addOperand(MCOperand::CreateReg(RegShiftedImm.SrcReg));
843 Inst.addOperand(MCOperand::CreateImm(
844 ARM_AM::getSORegOpc(RegShiftedImm.ShiftTy, RegShiftedImm.ShiftImm)));
848 void addShifterImmOperands(MCInst &Inst, unsigned N) const {
849 assert(N == 1 && "Invalid number of operands!");
850 Inst.addOperand(MCOperand::CreateImm((ShifterImm.isASR << 5) |
854 void addRegListOperands(MCInst &Inst, unsigned N) const {
855 assert(N == 1 && "Invalid number of operands!");
856 const SmallVectorImpl<unsigned> &RegList = getRegList();
857 for (SmallVectorImpl<unsigned>::const_iterator
858 I = RegList.begin(), E = RegList.end(); I != E; ++I)
859 Inst.addOperand(MCOperand::CreateReg(*I));
862 void addDPRRegListOperands(MCInst &Inst, unsigned N) const {
863 addRegListOperands(Inst, N);
866 void addSPRRegListOperands(MCInst &Inst, unsigned N) const {
867 addRegListOperands(Inst, N);
870 void addRotImmOperands(MCInst &Inst, unsigned N) const {
871 assert(N == 1 && "Invalid number of operands!");
872 // Encoded as val>>3. The printer handles display as 8, 16, 24.
873 Inst.addOperand(MCOperand::CreateImm(RotImm.Imm >> 3));
876 void addBitfieldOperands(MCInst &Inst, unsigned N) const {
877 assert(N == 1 && "Invalid number of operands!");
878 // Munge the lsb/width into a bitfield mask.
879 unsigned lsb = Bitfield.LSB;
880 unsigned width = Bitfield.Width;
881 // Make a 32-bit mask w/ the referenced bits clear and all other bits set.
882 uint32_t Mask = ~(((uint32_t)0xffffffff >> lsb) << (32 - width) >>
883 (32 - (lsb + width)));
884 Inst.addOperand(MCOperand::CreateImm(Mask));
887 void addImmOperands(MCInst &Inst, unsigned N) const {
888 assert(N == 1 && "Invalid number of operands!");
889 addExpr(Inst, getImm());
892 void addImm0_1020s4Operands(MCInst &Inst, unsigned N) const {
893 assert(N == 1 && "Invalid number of operands!");
894 // The immediate is scaled by four in the encoding and is stored
895 // in the MCInst as such. Lop off the low two bits here.
896 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
897 Inst.addOperand(MCOperand::CreateImm(CE->getValue() / 4));
900 void addImm0_508s4Operands(MCInst &Inst, unsigned N) const {
901 assert(N == 1 && "Invalid number of operands!");
902 // The immediate is scaled by four in the encoding and is stored
903 // in the MCInst as such. Lop off the low two bits here.
904 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
905 Inst.addOperand(MCOperand::CreateImm(CE->getValue() / 4));
908 void addImm0_255Operands(MCInst &Inst, unsigned N) const {
909 assert(N == 1 && "Invalid number of operands!");
910 addExpr(Inst, getImm());
913 void addImm0_7Operands(MCInst &Inst, unsigned N) const {
914 assert(N == 1 && "Invalid number of operands!");
915 addExpr(Inst, getImm());
918 void addImm0_15Operands(MCInst &Inst, unsigned N) const {
919 assert(N == 1 && "Invalid number of operands!");
920 addExpr(Inst, getImm());
923 void addImm0_31Operands(MCInst &Inst, unsigned N) const {
924 assert(N == 1 && "Invalid number of operands!");
925 addExpr(Inst, getImm());
928 void addImm1_16Operands(MCInst &Inst, unsigned N) const {
929 assert(N == 1 && "Invalid number of operands!");
930 // The constant encodes as the immediate-1, and we store in the instruction
931 // the bits as encoded, so subtract off one here.
932 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
933 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
936 void addImm1_32Operands(MCInst &Inst, unsigned N) const {
937 assert(N == 1 && "Invalid number of operands!");
938 // The constant encodes as the immediate-1, and we store in the instruction
939 // the bits as encoded, so subtract off one here.
940 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
941 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
944 void addImm0_65535Operands(MCInst &Inst, unsigned N) const {
945 assert(N == 1 && "Invalid number of operands!");
946 addExpr(Inst, getImm());
949 void addImm0_65535ExprOperands(MCInst &Inst, unsigned N) const {
950 assert(N == 1 && "Invalid number of operands!");
951 addExpr(Inst, getImm());
954 void addImm24bitOperands(MCInst &Inst, unsigned N) const {
955 assert(N == 1 && "Invalid number of operands!");
956 addExpr(Inst, getImm());
959 void addImmThumbSROperands(MCInst &Inst, unsigned N) const {
960 assert(N == 1 && "Invalid number of operands!");
961 // The constant encodes as the immediate, except for 32, which encodes as
963 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
964 unsigned Imm = CE->getValue();
965 Inst.addOperand(MCOperand::CreateImm((Imm == 32 ? 0 : Imm)));
968 void addPKHLSLImmOperands(MCInst &Inst, unsigned N) const {
969 assert(N == 1 && "Invalid number of operands!");
970 addExpr(Inst, getImm());
973 void addPKHASRImmOperands(MCInst &Inst, unsigned N) const {
974 assert(N == 1 && "Invalid number of operands!");
975 // An ASR value of 32 encodes as 0, so that's how we want to add it to
976 // the instruction as well.
977 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
978 int Val = CE->getValue();
979 Inst.addOperand(MCOperand::CreateImm(Val == 32 ? 0 : Val));
982 void addARMSOImmOperands(MCInst &Inst, unsigned N) const {
983 assert(N == 1 && "Invalid number of operands!");
984 addExpr(Inst, getImm());
987 void addT2SOImmOperands(MCInst &Inst, unsigned N) const {
988 assert(N == 1 && "Invalid number of operands!");
989 addExpr(Inst, getImm());
992 void addSetEndImmOperands(MCInst &Inst, unsigned N) const {
993 assert(N == 1 && "Invalid number of operands!");
994 addExpr(Inst, getImm());
997 void addMemBarrierOptOperands(MCInst &Inst, unsigned N) const {
998 assert(N == 1 && "Invalid number of operands!");
999 Inst.addOperand(MCOperand::CreateImm(unsigned(getMemBarrierOpt())));
1002 void addMemNoOffsetOperands(MCInst &Inst, unsigned N) const {
1003 assert(N == 1 && "Invalid number of operands!");
1004 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1007 void addAddrMode2Operands(MCInst &Inst, unsigned N) const {
1008 assert(N == 3 && "Invalid number of operands!");
1009 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
1010 if (!Mem.OffsetRegNum) {
1011 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1012 // Special case for #-0
1013 if (Val == INT32_MIN) Val = 0;
1014 if (Val < 0) Val = -Val;
1015 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
1017 // For register offset, we encode the shift type and negation flag
1019 Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
1020 Mem.ShiftImm, Mem.ShiftType);
1022 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1023 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
1024 Inst.addOperand(MCOperand::CreateImm(Val));
1027 void addAM2OffsetImmOperands(MCInst &Inst, unsigned N) const {
1028 assert(N == 2 && "Invalid number of operands!");
1029 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1030 assert(CE && "non-constant AM2OffsetImm operand!");
1031 int32_t Val = CE->getValue();
1032 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1033 // Special case for #-0
1034 if (Val == INT32_MIN) Val = 0;
1035 if (Val < 0) Val = -Val;
1036 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
1037 Inst.addOperand(MCOperand::CreateReg(0));
1038 Inst.addOperand(MCOperand::CreateImm(Val));
1041 void addAddrMode3Operands(MCInst &Inst, unsigned N) const {
1042 assert(N == 3 && "Invalid number of operands!");
1043 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
1044 if (!Mem.OffsetRegNum) {
1045 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1046 // Special case for #-0
1047 if (Val == INT32_MIN) Val = 0;
1048 if (Val < 0) Val = -Val;
1049 Val = ARM_AM::getAM3Opc(AddSub, Val);
1051 // For register offset, we encode the shift type and negation flag
1053 Val = ARM_AM::getAM3Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add, 0);
1055 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1056 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
1057 Inst.addOperand(MCOperand::CreateImm(Val));
1060 void addAM3OffsetOperands(MCInst &Inst, unsigned N) const {
1061 assert(N == 2 && "Invalid number of operands!");
1062 if (Kind == PostIndexRegister) {
1064 ARM_AM::getAM3Opc(PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub, 0);
1065 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1066 Inst.addOperand(MCOperand::CreateImm(Val));
1071 const MCConstantExpr *CE = static_cast<const MCConstantExpr*>(getImm());
1072 int32_t Val = CE->getValue();
1073 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1074 // Special case for #-0
1075 if (Val == INT32_MIN) Val = 0;
1076 if (Val < 0) Val = -Val;
1077 Val = ARM_AM::getAM3Opc(AddSub, Val);
1078 Inst.addOperand(MCOperand::CreateReg(0));
1079 Inst.addOperand(MCOperand::CreateImm(Val));
1082 void addAddrMode5Operands(MCInst &Inst, unsigned N) const {
1083 assert(N == 2 && "Invalid number of operands!");
1084 // The lower two bits are always zero and as such are not encoded.
1085 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() / 4 : 0;
1086 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1087 // Special case for #-0
1088 if (Val == INT32_MIN) Val = 0;
1089 if (Val < 0) Val = -Val;
1090 Val = ARM_AM::getAM5Opc(AddSub, Val);
1091 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1092 Inst.addOperand(MCOperand::CreateImm(Val));
1095 void addMemImm8OffsetOperands(MCInst &Inst, unsigned N) const {
1096 assert(N == 2 && "Invalid number of operands!");
1097 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
1098 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1099 Inst.addOperand(MCOperand::CreateImm(Val));
1102 void addMemNegImm8OffsetOperands(MCInst &Inst, unsigned N) const {
1103 assert(N == 2 && "Invalid number of operands!");
1104 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
1105 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1106 Inst.addOperand(MCOperand::CreateImm(Val));
1109 void addMemUImm12OffsetOperands(MCInst &Inst, unsigned N) const {
1110 assert(N == 2 && "Invalid number of operands!");
1111 // If this is an immediate, it's a label reference.
1112 if (Kind == Immediate) {
1113 addExpr(Inst, getImm());
1114 Inst.addOperand(MCOperand::CreateImm(0));
1118 // Otherwise, it's a normal memory reg+offset.
1119 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
1120 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1121 Inst.addOperand(MCOperand::CreateImm(Val));
1124 void addMemImm12OffsetOperands(MCInst &Inst, unsigned N) const {
1125 assert(N == 2 && "Invalid number of operands!");
1126 // If this is an immediate, it's a label reference.
1127 if (Kind == Immediate) {
1128 addExpr(Inst, getImm());
1129 Inst.addOperand(MCOperand::CreateImm(0));
1133 // Otherwise, it's a normal memory reg+offset.
1134 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
1135 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1136 Inst.addOperand(MCOperand::CreateImm(Val));
1139 void addMemRegOffsetOperands(MCInst &Inst, unsigned N) const {
1140 assert(N == 3 && "Invalid number of operands!");
1141 unsigned Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
1142 Mem.ShiftImm, Mem.ShiftType);
1143 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1144 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
1145 Inst.addOperand(MCOperand::CreateImm(Val));
1148 void addMemThumbRROperands(MCInst &Inst, unsigned N) const {
1149 assert(N == 2 && "Invalid number of operands!");
1150 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1151 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
1154 void addMemThumbRIs4Operands(MCInst &Inst, unsigned N) const {
1155 assert(N == 2 && "Invalid number of operands!");
1156 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 4) : 0;
1157 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1158 Inst.addOperand(MCOperand::CreateImm(Val));
1161 void addMemThumbRIs2Operands(MCInst &Inst, unsigned N) const {
1162 assert(N == 2 && "Invalid number of operands!");
1163 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 2) : 0;
1164 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1165 Inst.addOperand(MCOperand::CreateImm(Val));
1168 void addMemThumbRIs1Operands(MCInst &Inst, unsigned N) const {
1169 assert(N == 2 && "Invalid number of operands!");
1170 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue()) : 0;
1171 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1172 Inst.addOperand(MCOperand::CreateImm(Val));
1175 void addMemThumbSPIOperands(MCInst &Inst, unsigned N) const {
1176 assert(N == 2 && "Invalid number of operands!");
1177 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 4) : 0;
1178 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1179 Inst.addOperand(MCOperand::CreateImm(Val));
1182 void addPostIdxImm8Operands(MCInst &Inst, unsigned N) const {
1183 assert(N == 1 && "Invalid number of operands!");
1184 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1185 assert(CE && "non-constant post-idx-imm8 operand!");
1186 int Imm = CE->getValue();
1187 bool isAdd = Imm >= 0;
1188 if (Imm == INT32_MIN) Imm = 0;
1189 Imm = (Imm < 0 ? -Imm : Imm) | (int)isAdd << 8;
1190 Inst.addOperand(MCOperand::CreateImm(Imm));
1193 void addPostIdxRegOperands(MCInst &Inst, unsigned N) const {
1194 assert(N == 2 && "Invalid number of operands!");
1195 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1196 Inst.addOperand(MCOperand::CreateImm(PostIdxReg.isAdd));
1199 void addPostIdxRegShiftedOperands(MCInst &Inst, unsigned N) const {
1200 assert(N == 2 && "Invalid number of operands!");
1201 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1202 // The sign, shift type, and shift amount are encoded in a single operand
1203 // using the AM2 encoding helpers.
1204 ARM_AM::AddrOpc opc = PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub;
1205 unsigned Imm = ARM_AM::getAM2Opc(opc, PostIdxReg.ShiftImm,
1206 PostIdxReg.ShiftTy);
1207 Inst.addOperand(MCOperand::CreateImm(Imm));
1210 void addMSRMaskOperands(MCInst &Inst, unsigned N) const {
1211 assert(N == 1 && "Invalid number of operands!");
1212 Inst.addOperand(MCOperand::CreateImm(unsigned(getMSRMask())));
1215 void addProcIFlagsOperands(MCInst &Inst, unsigned N) const {
1216 assert(N == 1 && "Invalid number of operands!");
1217 Inst.addOperand(MCOperand::CreateImm(unsigned(getProcIFlags())));
1220 virtual void print(raw_ostream &OS) const;
1222 static ARMOperand *CreateITMask(unsigned Mask, SMLoc S) {
1223 ARMOperand *Op = new ARMOperand(ITCondMask);
1224 Op->ITMask.Mask = Mask;
1230 static ARMOperand *CreateCondCode(ARMCC::CondCodes CC, SMLoc S) {
1231 ARMOperand *Op = new ARMOperand(CondCode);
1238 static ARMOperand *CreateCoprocNum(unsigned CopVal, SMLoc S) {
1239 ARMOperand *Op = new ARMOperand(CoprocNum);
1240 Op->Cop.Val = CopVal;
1246 static ARMOperand *CreateCoprocReg(unsigned CopVal, SMLoc S) {
1247 ARMOperand *Op = new ARMOperand(CoprocReg);
1248 Op->Cop.Val = CopVal;
1254 static ARMOperand *CreateCCOut(unsigned RegNum, SMLoc S) {
1255 ARMOperand *Op = new ARMOperand(CCOut);
1256 Op->Reg.RegNum = RegNum;
1262 static ARMOperand *CreateToken(StringRef Str, SMLoc S) {
1263 ARMOperand *Op = new ARMOperand(Token);
1264 Op->Tok.Data = Str.data();
1265 Op->Tok.Length = Str.size();
1271 static ARMOperand *CreateReg(unsigned RegNum, SMLoc S, SMLoc E) {
1272 ARMOperand *Op = new ARMOperand(Register);
1273 Op->Reg.RegNum = RegNum;
1279 static ARMOperand *CreateShiftedRegister(ARM_AM::ShiftOpc ShTy,
1284 ARMOperand *Op = new ARMOperand(ShiftedRegister);
1285 Op->RegShiftedReg.ShiftTy = ShTy;
1286 Op->RegShiftedReg.SrcReg = SrcReg;
1287 Op->RegShiftedReg.ShiftReg = ShiftReg;
1288 Op->RegShiftedReg.ShiftImm = ShiftImm;
1294 static ARMOperand *CreateShiftedImmediate(ARM_AM::ShiftOpc ShTy,
1298 ARMOperand *Op = new ARMOperand(ShiftedImmediate);
1299 Op->RegShiftedImm.ShiftTy = ShTy;
1300 Op->RegShiftedImm.SrcReg = SrcReg;
1301 Op->RegShiftedImm.ShiftImm = ShiftImm;
1307 static ARMOperand *CreateShifterImm(bool isASR, unsigned Imm,
1309 ARMOperand *Op = new ARMOperand(ShifterImmediate);
1310 Op->ShifterImm.isASR = isASR;
1311 Op->ShifterImm.Imm = Imm;
1317 static ARMOperand *CreateRotImm(unsigned Imm, SMLoc S, SMLoc E) {
1318 ARMOperand *Op = new ARMOperand(RotateImmediate);
1319 Op->RotImm.Imm = Imm;
1325 static ARMOperand *CreateBitfield(unsigned LSB, unsigned Width,
1327 ARMOperand *Op = new ARMOperand(BitfieldDescriptor);
1328 Op->Bitfield.LSB = LSB;
1329 Op->Bitfield.Width = Width;
1336 CreateRegList(const SmallVectorImpl<std::pair<unsigned, SMLoc> > &Regs,
1337 SMLoc StartLoc, SMLoc EndLoc) {
1338 KindTy Kind = RegisterList;
1340 if (llvm::ARMMCRegisterClasses[ARM::DPRRegClassID].
1341 contains(Regs.front().first))
1342 Kind = DPRRegisterList;
1343 else if (llvm::ARMMCRegisterClasses[ARM::SPRRegClassID].
1344 contains(Regs.front().first))
1345 Kind = SPRRegisterList;
1347 ARMOperand *Op = new ARMOperand(Kind);
1348 for (SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1349 I = Regs.begin(), E = Regs.end(); I != E; ++I)
1350 Op->Registers.push_back(I->first);
1351 array_pod_sort(Op->Registers.begin(), Op->Registers.end());
1352 Op->StartLoc = StartLoc;
1353 Op->EndLoc = EndLoc;
1357 static ARMOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
1358 ARMOperand *Op = new ARMOperand(Immediate);
1365 static ARMOperand *CreateMem(unsigned BaseRegNum,
1366 const MCConstantExpr *OffsetImm,
1367 unsigned OffsetRegNum,
1368 ARM_AM::ShiftOpc ShiftType,
1372 ARMOperand *Op = new ARMOperand(Memory);
1373 Op->Mem.BaseRegNum = BaseRegNum;
1374 Op->Mem.OffsetImm = OffsetImm;
1375 Op->Mem.OffsetRegNum = OffsetRegNum;
1376 Op->Mem.ShiftType = ShiftType;
1377 Op->Mem.ShiftImm = ShiftImm;
1378 Op->Mem.isNegative = isNegative;
1384 static ARMOperand *CreatePostIdxReg(unsigned RegNum, bool isAdd,
1385 ARM_AM::ShiftOpc ShiftTy,
1388 ARMOperand *Op = new ARMOperand(PostIndexRegister);
1389 Op->PostIdxReg.RegNum = RegNum;
1390 Op->PostIdxReg.isAdd = isAdd;
1391 Op->PostIdxReg.ShiftTy = ShiftTy;
1392 Op->PostIdxReg.ShiftImm = ShiftImm;
1398 static ARMOperand *CreateMemBarrierOpt(ARM_MB::MemBOpt Opt, SMLoc S) {
1399 ARMOperand *Op = new ARMOperand(MemBarrierOpt);
1400 Op->MBOpt.Val = Opt;
1406 static ARMOperand *CreateProcIFlags(ARM_PROC::IFlags IFlags, SMLoc S) {
1407 ARMOperand *Op = new ARMOperand(ProcIFlags);
1408 Op->IFlags.Val = IFlags;
1414 static ARMOperand *CreateMSRMask(unsigned MMask, SMLoc S) {
1415 ARMOperand *Op = new ARMOperand(MSRMask);
1416 Op->MMask.Val = MMask;
1423 } // end anonymous namespace.
1425 void ARMOperand::print(raw_ostream &OS) const {
1428 OS << "<ARMCC::" << ARMCondCodeToString(getCondCode()) << ">";
1431 OS << "<ccout " << getReg() << ">";
1434 static char MaskStr[][6] = { "()", "(t)", "(e)", "(tt)", "(et)", "(te)",
1435 "(ee)", "(ttt)", "(ett)", "(tet)", "(eet)", "(tte)", "(ete)",
1437 assert((ITMask.Mask & 0xf) == ITMask.Mask);
1438 OS << "<it-mask " << MaskStr[ITMask.Mask] << ">";
1442 OS << "<coprocessor number: " << getCoproc() << ">";
1445 OS << "<coprocessor register: " << getCoproc() << ">";
1448 OS << "<mask: " << getMSRMask() << ">";
1451 getImm()->print(OS);
1454 OS << "<ARM_MB::" << MemBOptToString(getMemBarrierOpt()) << ">";
1458 << " base:" << Mem.BaseRegNum;
1461 case PostIndexRegister:
1462 OS << "post-idx register " << (PostIdxReg.isAdd ? "" : "-")
1463 << PostIdxReg.RegNum;
1464 if (PostIdxReg.ShiftTy != ARM_AM::no_shift)
1465 OS << ARM_AM::getShiftOpcStr(PostIdxReg.ShiftTy) << " "
1466 << PostIdxReg.ShiftImm;
1470 OS << "<ARM_PROC::";
1471 unsigned IFlags = getProcIFlags();
1472 for (int i=2; i >= 0; --i)
1473 if (IFlags & (1 << i))
1474 OS << ARM_PROC::IFlagsToString(1 << i);
1479 OS << "<register " << getReg() << ">";
1481 case ShifterImmediate:
1482 OS << "<shift " << (ShifterImm.isASR ? "asr" : "lsl")
1483 << " #" << ShifterImm.Imm << ">";
1485 case ShiftedRegister:
1486 OS << "<so_reg_reg "
1487 << RegShiftedReg.SrcReg
1488 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedReg.ShiftImm))
1489 << ", " << RegShiftedReg.ShiftReg << ", "
1490 << ARM_AM::getSORegOffset(RegShiftedReg.ShiftImm)
1493 case ShiftedImmediate:
1494 OS << "<so_reg_imm "
1495 << RegShiftedImm.SrcReg
1496 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedImm.ShiftImm))
1497 << ", " << ARM_AM::getSORegOffset(RegShiftedImm.ShiftImm)
1500 case RotateImmediate:
1501 OS << "<ror " << " #" << (RotImm.Imm * 8) << ">";
1503 case BitfieldDescriptor:
1504 OS << "<bitfield " << "lsb: " << Bitfield.LSB
1505 << ", width: " << Bitfield.Width << ">";
1508 case DPRRegisterList:
1509 case SPRRegisterList: {
1510 OS << "<register_list ";
1512 const SmallVectorImpl<unsigned> &RegList = getRegList();
1513 for (SmallVectorImpl<unsigned>::const_iterator
1514 I = RegList.begin(), E = RegList.end(); I != E; ) {
1516 if (++I < E) OS << ", ";
1523 OS << "'" << getToken() << "'";
1528 /// @name Auto-generated Match Functions
1531 static unsigned MatchRegisterName(StringRef Name);
1535 bool ARMAsmParser::ParseRegister(unsigned &RegNo,
1536 SMLoc &StartLoc, SMLoc &EndLoc) {
1537 RegNo = tryParseRegister();
1539 return (RegNo == (unsigned)-1);
1542 /// Try to parse a register name. The token must be an Identifier when called,
1543 /// and if it is a register name the token is eaten and the register number is
1544 /// returned. Otherwise return -1.
1546 int ARMAsmParser::tryParseRegister() {
1547 const AsmToken &Tok = Parser.getTok();
1548 if (Tok.isNot(AsmToken::Identifier)) return -1;
1550 // FIXME: Validate register for the current architecture; we have to do
1551 // validation later, so maybe there is no need for this here.
1552 std::string upperCase = Tok.getString().str();
1553 std::string lowerCase = LowercaseString(upperCase);
1554 unsigned RegNum = MatchRegisterName(lowerCase);
1556 RegNum = StringSwitch<unsigned>(lowerCase)
1557 .Case("r13", ARM::SP)
1558 .Case("r14", ARM::LR)
1559 .Case("r15", ARM::PC)
1560 .Case("ip", ARM::R12)
1563 if (!RegNum) return -1;
1565 Parser.Lex(); // Eat identifier token.
1569 // Try to parse a shifter (e.g., "lsl <amt>"). On success, return 0.
1570 // If a recoverable error occurs, return 1. If an irrecoverable error
1571 // occurs, return -1. An irrecoverable error is one where tokens have been
1572 // consumed in the process of trying to parse the shifter (i.e., when it is
1573 // indeed a shifter operand, but malformed).
1574 int ARMAsmParser::tryParseShiftRegister(
1575 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1576 SMLoc S = Parser.getTok().getLoc();
1577 const AsmToken &Tok = Parser.getTok();
1578 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1580 std::string upperCase = Tok.getString().str();
1581 std::string lowerCase = LowercaseString(upperCase);
1582 ARM_AM::ShiftOpc ShiftTy = StringSwitch<ARM_AM::ShiftOpc>(lowerCase)
1583 .Case("lsl", ARM_AM::lsl)
1584 .Case("lsr", ARM_AM::lsr)
1585 .Case("asr", ARM_AM::asr)
1586 .Case("ror", ARM_AM::ror)
1587 .Case("rrx", ARM_AM::rrx)
1588 .Default(ARM_AM::no_shift);
1590 if (ShiftTy == ARM_AM::no_shift)
1593 Parser.Lex(); // Eat the operator.
1595 // The source register for the shift has already been added to the
1596 // operand list, so we need to pop it off and combine it into the shifted
1597 // register operand instead.
1598 OwningPtr<ARMOperand> PrevOp((ARMOperand*)Operands.pop_back_val());
1599 if (!PrevOp->isReg())
1600 return Error(PrevOp->getStartLoc(), "shift must be of a register");
1601 int SrcReg = PrevOp->getReg();
1604 if (ShiftTy == ARM_AM::rrx) {
1605 // RRX Doesn't have an explicit shift amount. The encoder expects
1606 // the shift register to be the same as the source register. Seems odd,
1610 // Figure out if this is shifted by a constant or a register (for non-RRX).
1611 if (Parser.getTok().is(AsmToken::Hash)) {
1612 Parser.Lex(); // Eat hash.
1613 SMLoc ImmLoc = Parser.getTok().getLoc();
1614 const MCExpr *ShiftExpr = 0;
1615 if (getParser().ParseExpression(ShiftExpr)) {
1616 Error(ImmLoc, "invalid immediate shift value");
1619 // The expression must be evaluatable as an immediate.
1620 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftExpr);
1622 Error(ImmLoc, "invalid immediate shift value");
1625 // Range check the immediate.
1626 // lsl, ror: 0 <= imm <= 31
1627 // lsr, asr: 0 <= imm <= 32
1628 Imm = CE->getValue();
1630 ((ShiftTy == ARM_AM::lsl || ShiftTy == ARM_AM::ror) && Imm > 31) ||
1631 ((ShiftTy == ARM_AM::lsr || ShiftTy == ARM_AM::asr) && Imm > 32)) {
1632 Error(ImmLoc, "immediate shift value out of range");
1635 } else if (Parser.getTok().is(AsmToken::Identifier)) {
1636 ShiftReg = tryParseRegister();
1637 SMLoc L = Parser.getTok().getLoc();
1638 if (ShiftReg == -1) {
1639 Error (L, "expected immediate or register in shift operand");
1643 Error (Parser.getTok().getLoc(),
1644 "expected immediate or register in shift operand");
1649 if (ShiftReg && ShiftTy != ARM_AM::rrx)
1650 Operands.push_back(ARMOperand::CreateShiftedRegister(ShiftTy, SrcReg,
1652 S, Parser.getTok().getLoc()));
1654 Operands.push_back(ARMOperand::CreateShiftedImmediate(ShiftTy, SrcReg, Imm,
1655 S, Parser.getTok().getLoc()));
1661 /// Try to parse a register name. The token must be an Identifier when called.
1662 /// If it's a register, an AsmOperand is created. Another AsmOperand is created
1663 /// if there is a "writeback". 'true' if it's not a register.
1665 /// TODO this is likely to change to allow different register types and or to
1666 /// parse for a specific register type.
1668 tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1669 SMLoc S = Parser.getTok().getLoc();
1670 int RegNo = tryParseRegister();
1674 Operands.push_back(ARMOperand::CreateReg(RegNo, S, Parser.getTok().getLoc()));
1676 const AsmToken &ExclaimTok = Parser.getTok();
1677 if (ExclaimTok.is(AsmToken::Exclaim)) {
1678 Operands.push_back(ARMOperand::CreateToken(ExclaimTok.getString(),
1679 ExclaimTok.getLoc()));
1680 Parser.Lex(); // Eat exclaim token
1686 /// MatchCoprocessorOperandName - Try to parse an coprocessor related
1687 /// instruction with a symbolic operand name. Example: "p1", "p7", "c3",
1689 static int MatchCoprocessorOperandName(StringRef Name, char CoprocOp) {
1690 // Use the same layout as the tablegen'erated register name matcher. Ugly,
1692 switch (Name.size()) {
1695 if (Name[0] != CoprocOp)
1712 if (Name[0] != CoprocOp || Name[1] != '1')
1716 case '0': return 10;
1717 case '1': return 11;
1718 case '2': return 12;
1719 case '3': return 13;
1720 case '4': return 14;
1721 case '5': return 15;
1729 /// parseITCondCode - Try to parse a condition code for an IT instruction.
1730 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1731 parseITCondCode(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1732 SMLoc S = Parser.getTok().getLoc();
1733 const AsmToken &Tok = Parser.getTok();
1734 if (!Tok.is(AsmToken::Identifier))
1735 return MatchOperand_NoMatch;
1736 unsigned CC = StringSwitch<unsigned>(Tok.getString())
1737 .Case("eq", ARMCC::EQ)
1738 .Case("ne", ARMCC::NE)
1739 .Case("hs", ARMCC::HS)
1740 .Case("cs", ARMCC::HS)
1741 .Case("lo", ARMCC::LO)
1742 .Case("cc", ARMCC::LO)
1743 .Case("mi", ARMCC::MI)
1744 .Case("pl", ARMCC::PL)
1745 .Case("vs", ARMCC::VS)
1746 .Case("vc", ARMCC::VC)
1747 .Case("hi", ARMCC::HI)
1748 .Case("ls", ARMCC::LS)
1749 .Case("ge", ARMCC::GE)
1750 .Case("lt", ARMCC::LT)
1751 .Case("gt", ARMCC::GT)
1752 .Case("le", ARMCC::LE)
1753 .Case("al", ARMCC::AL)
1756 return MatchOperand_NoMatch;
1757 Parser.Lex(); // Eat the token.
1759 Operands.push_back(ARMOperand::CreateCondCode(ARMCC::CondCodes(CC), S));
1761 return MatchOperand_Success;
1764 /// parseCoprocNumOperand - Try to parse an coprocessor number operand. The
1765 /// token must be an Identifier when called, and if it is a coprocessor
1766 /// number, the token is eaten and the operand is added to the operand list.
1767 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1768 parseCoprocNumOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1769 SMLoc S = Parser.getTok().getLoc();
1770 const AsmToken &Tok = Parser.getTok();
1771 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1773 int Num = MatchCoprocessorOperandName(Tok.getString(), 'p');
1775 return MatchOperand_NoMatch;
1777 Parser.Lex(); // Eat identifier token.
1778 Operands.push_back(ARMOperand::CreateCoprocNum(Num, S));
1779 return MatchOperand_Success;
1782 /// parseCoprocRegOperand - Try to parse an coprocessor register operand. The
1783 /// token must be an Identifier when called, and if it is a coprocessor
1784 /// number, the token is eaten and the operand is added to the operand list.
1785 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1786 parseCoprocRegOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1787 SMLoc S = Parser.getTok().getLoc();
1788 const AsmToken &Tok = Parser.getTok();
1789 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1791 int Reg = MatchCoprocessorOperandName(Tok.getString(), 'c');
1793 return MatchOperand_NoMatch;
1795 Parser.Lex(); // Eat identifier token.
1796 Operands.push_back(ARMOperand::CreateCoprocReg(Reg, S));
1797 return MatchOperand_Success;
1800 /// Parse a register list, return it if successful else return null. The first
1801 /// token must be a '{' when called.
1803 parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1804 assert(Parser.getTok().is(AsmToken::LCurly) &&
1805 "Token is not a Left Curly Brace");
1806 SMLoc S = Parser.getTok().getLoc();
1808 // Read the rest of the registers in the list.
1809 unsigned PrevRegNum = 0;
1810 SmallVector<std::pair<unsigned, SMLoc>, 32> Registers;
1813 bool IsRange = Parser.getTok().is(AsmToken::Minus);
1814 Parser.Lex(); // Eat non-identifier token.
1816 const AsmToken &RegTok = Parser.getTok();
1817 SMLoc RegLoc = RegTok.getLoc();
1818 if (RegTok.isNot(AsmToken::Identifier)) {
1819 Error(RegLoc, "register expected");
1823 int RegNum = tryParseRegister();
1825 Error(RegLoc, "register expected");
1830 int Reg = PrevRegNum;
1833 Registers.push_back(std::make_pair(Reg, RegLoc));
1834 } while (Reg != RegNum);
1836 Registers.push_back(std::make_pair(RegNum, RegLoc));
1839 PrevRegNum = RegNum;
1840 } while (Parser.getTok().is(AsmToken::Comma) ||
1841 Parser.getTok().is(AsmToken::Minus));
1843 // Process the right curly brace of the list.
1844 const AsmToken &RCurlyTok = Parser.getTok();
1845 if (RCurlyTok.isNot(AsmToken::RCurly)) {
1846 Error(RCurlyTok.getLoc(), "'}' expected");
1850 SMLoc E = RCurlyTok.getLoc();
1851 Parser.Lex(); // Eat right curly brace token.
1853 // Verify the register list.
1854 bool EmittedWarning = false;
1855 unsigned HighRegNum = 0;
1856 BitVector RegMap(32);
1857 for (unsigned i = 0, e = Registers.size(); i != e; ++i) {
1858 const std::pair<unsigned, SMLoc> &RegInfo = Registers[i];
1859 unsigned Reg = getARMRegisterNumbering(RegInfo.first);
1862 Error(RegInfo.second, "register duplicated in register list");
1866 if (!EmittedWarning && Reg < HighRegNum)
1867 Warning(RegInfo.second,
1868 "register not in ascending order in register list");
1871 HighRegNum = std::max(Reg, HighRegNum);
1874 Operands.push_back(ARMOperand::CreateRegList(Registers, S, E));
1878 /// parseMemBarrierOptOperand - Try to parse DSB/DMB data barrier options.
1879 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1880 parseMemBarrierOptOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1881 SMLoc S = Parser.getTok().getLoc();
1882 const AsmToken &Tok = Parser.getTok();
1883 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1884 StringRef OptStr = Tok.getString();
1886 unsigned Opt = StringSwitch<unsigned>(OptStr.slice(0, OptStr.size()))
1887 .Case("sy", ARM_MB::SY)
1888 .Case("st", ARM_MB::ST)
1889 .Case("sh", ARM_MB::ISH)
1890 .Case("ish", ARM_MB::ISH)
1891 .Case("shst", ARM_MB::ISHST)
1892 .Case("ishst", ARM_MB::ISHST)
1893 .Case("nsh", ARM_MB::NSH)
1894 .Case("un", ARM_MB::NSH)
1895 .Case("nshst", ARM_MB::NSHST)
1896 .Case("unst", ARM_MB::NSHST)
1897 .Case("osh", ARM_MB::OSH)
1898 .Case("oshst", ARM_MB::OSHST)
1902 return MatchOperand_NoMatch;
1904 Parser.Lex(); // Eat identifier token.
1905 Operands.push_back(ARMOperand::CreateMemBarrierOpt((ARM_MB::MemBOpt)Opt, S));
1906 return MatchOperand_Success;
1909 /// parseProcIFlagsOperand - Try to parse iflags from CPS instruction.
1910 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1911 parseProcIFlagsOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1912 SMLoc S = Parser.getTok().getLoc();
1913 const AsmToken &Tok = Parser.getTok();
1914 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1915 StringRef IFlagsStr = Tok.getString();
1917 unsigned IFlags = 0;
1918 for (int i = 0, e = IFlagsStr.size(); i != e; ++i) {
1919 unsigned Flag = StringSwitch<unsigned>(IFlagsStr.substr(i, 1))
1920 .Case("a", ARM_PROC::A)
1921 .Case("i", ARM_PROC::I)
1922 .Case("f", ARM_PROC::F)
1925 // If some specific iflag is already set, it means that some letter is
1926 // present more than once, this is not acceptable.
1927 if (Flag == ~0U || (IFlags & Flag))
1928 return MatchOperand_NoMatch;
1933 Parser.Lex(); // Eat identifier token.
1934 Operands.push_back(ARMOperand::CreateProcIFlags((ARM_PROC::IFlags)IFlags, S));
1935 return MatchOperand_Success;
1938 /// parseMSRMaskOperand - Try to parse mask flags from MSR instruction.
1939 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1940 parseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1941 SMLoc S = Parser.getTok().getLoc();
1942 const AsmToken &Tok = Parser.getTok();
1943 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1944 StringRef Mask = Tok.getString();
1946 // Split spec_reg from flag, example: CPSR_sxf => "CPSR" and "sxf"
1947 size_t Start = 0, Next = Mask.find('_');
1948 StringRef Flags = "";
1949 std::string SpecReg = LowercaseString(Mask.slice(Start, Next));
1950 if (Next != StringRef::npos)
1951 Flags = Mask.slice(Next+1, Mask.size());
1953 // FlagsVal contains the complete mask:
1955 // 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1956 unsigned FlagsVal = 0;
1958 if (SpecReg == "apsr") {
1959 FlagsVal = StringSwitch<unsigned>(Flags)
1960 .Case("nzcvq", 0x8) // same as CPSR_f
1961 .Case("g", 0x4) // same as CPSR_s
1962 .Case("nzcvqg", 0xc) // same as CPSR_fs
1965 if (FlagsVal == ~0U) {
1967 return MatchOperand_NoMatch;
1969 FlagsVal = 0; // No flag
1971 } else if (SpecReg == "cpsr" || SpecReg == "spsr") {
1972 if (Flags == "all") // cpsr_all is an alias for cpsr_fc
1974 for (int i = 0, e = Flags.size(); i != e; ++i) {
1975 unsigned Flag = StringSwitch<unsigned>(Flags.substr(i, 1))
1982 // If some specific flag is already set, it means that some letter is
1983 // present more than once, this is not acceptable.
1984 if (FlagsVal == ~0U || (FlagsVal & Flag))
1985 return MatchOperand_NoMatch;
1988 } else // No match for special register.
1989 return MatchOperand_NoMatch;
1991 // Special register without flags are equivalent to "fc" flags.
1995 // Bit 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1996 if (SpecReg == "spsr")
1999 Parser.Lex(); // Eat identifier token.
2000 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
2001 return MatchOperand_Success;
2004 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2005 parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands, StringRef Op,
2006 int Low, int High) {
2007 const AsmToken &Tok = Parser.getTok();
2008 if (Tok.isNot(AsmToken::Identifier)) {
2009 Error(Parser.getTok().getLoc(), Op + " operand expected.");
2010 return MatchOperand_ParseFail;
2012 StringRef ShiftName = Tok.getString();
2013 std::string LowerOp = LowercaseString(Op);
2014 std::string UpperOp = UppercaseString(Op);
2015 if (ShiftName != LowerOp && ShiftName != UpperOp) {
2016 Error(Parser.getTok().getLoc(), Op + " operand expected.");
2017 return MatchOperand_ParseFail;
2019 Parser.Lex(); // Eat shift type token.
2021 // There must be a '#' and a shift amount.
2022 if (Parser.getTok().isNot(AsmToken::Hash)) {
2023 Error(Parser.getTok().getLoc(), "'#' expected");
2024 return MatchOperand_ParseFail;
2026 Parser.Lex(); // Eat hash token.
2028 const MCExpr *ShiftAmount;
2029 SMLoc Loc = Parser.getTok().getLoc();
2030 if (getParser().ParseExpression(ShiftAmount)) {
2031 Error(Loc, "illegal expression");
2032 return MatchOperand_ParseFail;
2034 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2036 Error(Loc, "constant expression expected");
2037 return MatchOperand_ParseFail;
2039 int Val = CE->getValue();
2040 if (Val < Low || Val > High) {
2041 Error(Loc, "immediate value out of range");
2042 return MatchOperand_ParseFail;
2045 Operands.push_back(ARMOperand::CreateImm(CE, Loc, Parser.getTok().getLoc()));
2047 return MatchOperand_Success;
2050 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2051 parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2052 const AsmToken &Tok = Parser.getTok();
2053 SMLoc S = Tok.getLoc();
2054 if (Tok.isNot(AsmToken::Identifier)) {
2055 Error(Tok.getLoc(), "'be' or 'le' operand expected");
2056 return MatchOperand_ParseFail;
2058 int Val = StringSwitch<int>(Tok.getString())
2062 Parser.Lex(); // Eat the token.
2065 Error(Tok.getLoc(), "'be' or 'le' operand expected");
2066 return MatchOperand_ParseFail;
2068 Operands.push_back(ARMOperand::CreateImm(MCConstantExpr::Create(Val,
2070 S, Parser.getTok().getLoc()));
2071 return MatchOperand_Success;
2074 /// parseShifterImm - Parse the shifter immediate operand for SSAT/USAT
2075 /// instructions. Legal values are:
2076 /// lsl #n 'n' in [0,31]
2077 /// asr #n 'n' in [1,32]
2078 /// n == 32 encoded as n == 0.
2079 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2080 parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2081 const AsmToken &Tok = Parser.getTok();
2082 SMLoc S = Tok.getLoc();
2083 if (Tok.isNot(AsmToken::Identifier)) {
2084 Error(S, "shift operator 'asr' or 'lsl' expected");
2085 return MatchOperand_ParseFail;
2087 StringRef ShiftName = Tok.getString();
2089 if (ShiftName == "lsl" || ShiftName == "LSL")
2091 else if (ShiftName == "asr" || ShiftName == "ASR")
2094 Error(S, "shift operator 'asr' or 'lsl' expected");
2095 return MatchOperand_ParseFail;
2097 Parser.Lex(); // Eat the operator.
2099 // A '#' and a shift amount.
2100 if (Parser.getTok().isNot(AsmToken::Hash)) {
2101 Error(Parser.getTok().getLoc(), "'#' expected");
2102 return MatchOperand_ParseFail;
2104 Parser.Lex(); // Eat hash token.
2106 const MCExpr *ShiftAmount;
2107 SMLoc E = Parser.getTok().getLoc();
2108 if (getParser().ParseExpression(ShiftAmount)) {
2109 Error(E, "malformed shift expression");
2110 return MatchOperand_ParseFail;
2112 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2114 Error(E, "shift amount must be an immediate");
2115 return MatchOperand_ParseFail;
2118 int64_t Val = CE->getValue();
2120 // Shift amount must be in [1,32]
2121 if (Val < 1 || Val > 32) {
2122 Error(E, "'asr' shift amount must be in range [1,32]");
2123 return MatchOperand_ParseFail;
2125 // asr #32 encoded as asr #0.
2126 if (Val == 32) Val = 0;
2128 // Shift amount must be in [1,32]
2129 if (Val < 0 || Val > 31) {
2130 Error(E, "'lsr' shift amount must be in range [0,31]");
2131 return MatchOperand_ParseFail;
2135 E = Parser.getTok().getLoc();
2136 Operands.push_back(ARMOperand::CreateShifterImm(isASR, Val, S, E));
2138 return MatchOperand_Success;
2141 /// parseRotImm - Parse the shifter immediate operand for SXTB/UXTB family
2142 /// of instructions. Legal values are:
2143 /// ror #n 'n' in {0, 8, 16, 24}
2144 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2145 parseRotImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2146 const AsmToken &Tok = Parser.getTok();
2147 SMLoc S = Tok.getLoc();
2148 if (Tok.isNot(AsmToken::Identifier)) {
2149 Error(S, "rotate operator 'ror' expected");
2150 return MatchOperand_ParseFail;
2152 StringRef ShiftName = Tok.getString();
2153 if (ShiftName != "ror" && ShiftName != "ROR") {
2154 Error(S, "rotate operator 'ror' expected");
2155 return MatchOperand_ParseFail;
2157 Parser.Lex(); // Eat the operator.
2159 // A '#' and a rotate amount.
2160 if (Parser.getTok().isNot(AsmToken::Hash)) {
2161 Error(Parser.getTok().getLoc(), "'#' expected");
2162 return MatchOperand_ParseFail;
2164 Parser.Lex(); // Eat hash token.
2166 const MCExpr *ShiftAmount;
2167 SMLoc E = Parser.getTok().getLoc();
2168 if (getParser().ParseExpression(ShiftAmount)) {
2169 Error(E, "malformed rotate expression");
2170 return MatchOperand_ParseFail;
2172 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2174 Error(E, "rotate amount must be an immediate");
2175 return MatchOperand_ParseFail;
2178 int64_t Val = CE->getValue();
2179 // Shift amount must be in {0, 8, 16, 24} (0 is undocumented extension)
2180 // normally, zero is represented in asm by omitting the rotate operand
2182 if (Val != 8 && Val != 16 && Val != 24 && Val != 0) {
2183 Error(E, "'ror' rotate amount must be 8, 16, or 24");
2184 return MatchOperand_ParseFail;
2187 E = Parser.getTok().getLoc();
2188 Operands.push_back(ARMOperand::CreateRotImm(Val, S, E));
2190 return MatchOperand_Success;
2193 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2194 parseBitfield(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2195 SMLoc S = Parser.getTok().getLoc();
2196 // The bitfield descriptor is really two operands, the LSB and the width.
2197 if (Parser.getTok().isNot(AsmToken::Hash)) {
2198 Error(Parser.getTok().getLoc(), "'#' expected");
2199 return MatchOperand_ParseFail;
2201 Parser.Lex(); // Eat hash token.
2203 const MCExpr *LSBExpr;
2204 SMLoc E = Parser.getTok().getLoc();
2205 if (getParser().ParseExpression(LSBExpr)) {
2206 Error(E, "malformed immediate expression");
2207 return MatchOperand_ParseFail;
2209 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(LSBExpr);
2211 Error(E, "'lsb' operand must be an immediate");
2212 return MatchOperand_ParseFail;
2215 int64_t LSB = CE->getValue();
2216 // The LSB must be in the range [0,31]
2217 if (LSB < 0 || LSB > 31) {
2218 Error(E, "'lsb' operand must be in the range [0,31]");
2219 return MatchOperand_ParseFail;
2221 E = Parser.getTok().getLoc();
2223 // Expect another immediate operand.
2224 if (Parser.getTok().isNot(AsmToken::Comma)) {
2225 Error(Parser.getTok().getLoc(), "too few operands");
2226 return MatchOperand_ParseFail;
2228 Parser.Lex(); // Eat hash token.
2229 if (Parser.getTok().isNot(AsmToken::Hash)) {
2230 Error(Parser.getTok().getLoc(), "'#' expected");
2231 return MatchOperand_ParseFail;
2233 Parser.Lex(); // Eat hash token.
2235 const MCExpr *WidthExpr;
2236 if (getParser().ParseExpression(WidthExpr)) {
2237 Error(E, "malformed immediate expression");
2238 return MatchOperand_ParseFail;
2240 CE = dyn_cast<MCConstantExpr>(WidthExpr);
2242 Error(E, "'width' operand must be an immediate");
2243 return MatchOperand_ParseFail;
2246 int64_t Width = CE->getValue();
2247 // The LSB must be in the range [1,32-lsb]
2248 if (Width < 1 || Width > 32 - LSB) {
2249 Error(E, "'width' operand must be in the range [1,32-lsb]");
2250 return MatchOperand_ParseFail;
2252 E = Parser.getTok().getLoc();
2254 Operands.push_back(ARMOperand::CreateBitfield(LSB, Width, S, E));
2256 return MatchOperand_Success;
2259 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2260 parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2261 // Check for a post-index addressing register operand. Specifically:
2262 // postidx_reg := '+' register {, shift}
2263 // | '-' register {, shift}
2264 // | register {, shift}
2266 // This method must return MatchOperand_NoMatch without consuming any tokens
2267 // in the case where there is no match, as other alternatives take other
2269 AsmToken Tok = Parser.getTok();
2270 SMLoc S = Tok.getLoc();
2271 bool haveEaten = false;
2274 if (Tok.is(AsmToken::Plus)) {
2275 Parser.Lex(); // Eat the '+' token.
2277 } else if (Tok.is(AsmToken::Minus)) {
2278 Parser.Lex(); // Eat the '-' token.
2282 if (Parser.getTok().is(AsmToken::Identifier))
2283 Reg = tryParseRegister();
2286 return MatchOperand_NoMatch;
2287 Error(Parser.getTok().getLoc(), "register expected");
2288 return MatchOperand_ParseFail;
2290 SMLoc E = Parser.getTok().getLoc();
2292 ARM_AM::ShiftOpc ShiftTy = ARM_AM::no_shift;
2293 unsigned ShiftImm = 0;
2294 if (Parser.getTok().is(AsmToken::Comma)) {
2295 Parser.Lex(); // Eat the ','.
2296 if (parseMemRegOffsetShift(ShiftTy, ShiftImm))
2297 return MatchOperand_ParseFail;
2300 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ShiftTy,
2303 return MatchOperand_Success;
2306 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2307 parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2308 // Check for a post-index addressing register operand. Specifically:
2309 // am3offset := '+' register
2316 // This method must return MatchOperand_NoMatch without consuming any tokens
2317 // in the case where there is no match, as other alternatives take other
2319 AsmToken Tok = Parser.getTok();
2320 SMLoc S = Tok.getLoc();
2322 // Do immediates first, as we always parse those if we have a '#'.
2323 if (Parser.getTok().is(AsmToken::Hash)) {
2324 Parser.Lex(); // Eat the '#'.
2325 // Explicitly look for a '-', as we need to encode negative zero
2327 bool isNegative = Parser.getTok().is(AsmToken::Minus);
2328 const MCExpr *Offset;
2329 if (getParser().ParseExpression(Offset))
2330 return MatchOperand_ParseFail;
2331 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2333 Error(S, "constant expression expected");
2334 return MatchOperand_ParseFail;
2336 SMLoc E = Tok.getLoc();
2337 // Negative zero is encoded as the flag value INT32_MIN.
2338 int32_t Val = CE->getValue();
2339 if (isNegative && Val == 0)
2343 ARMOperand::CreateImm(MCConstantExpr::Create(Val, getContext()), S, E));
2345 return MatchOperand_Success;
2349 bool haveEaten = false;
2352 if (Tok.is(AsmToken::Plus)) {
2353 Parser.Lex(); // Eat the '+' token.
2355 } else if (Tok.is(AsmToken::Minus)) {
2356 Parser.Lex(); // Eat the '-' token.
2360 if (Parser.getTok().is(AsmToken::Identifier))
2361 Reg = tryParseRegister();
2364 return MatchOperand_NoMatch;
2365 Error(Parser.getTok().getLoc(), "register expected");
2366 return MatchOperand_ParseFail;
2368 SMLoc E = Parser.getTok().getLoc();
2370 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ARM_AM::no_shift,
2373 return MatchOperand_Success;
2376 /// cvtLdWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2377 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2378 /// when they refer multiple MIOperands inside a single one.
2380 cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2381 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2382 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2384 // Create a writeback register dummy placeholder.
2385 Inst.addOperand(MCOperand::CreateImm(0));
2387 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2388 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2392 /// cvtLdWriteBackRegAddrModeImm12 - Convert parsed operands to MCInst.
2393 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2394 /// when they refer multiple MIOperands inside a single one.
2396 cvtLdWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
2397 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2398 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2400 // Create a writeback register dummy placeholder.
2401 Inst.addOperand(MCOperand::CreateImm(0));
2403 ((ARMOperand*)Operands[3])->addMemImm12OffsetOperands(Inst, 2);
2404 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2409 /// cvtStWriteBackRegAddrModeImm12 - Convert parsed operands to MCInst.
2410 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2411 /// when they refer multiple MIOperands inside a single one.
2413 cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
2414 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2415 // Create a writeback register dummy placeholder.
2416 Inst.addOperand(MCOperand::CreateImm(0));
2417 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2418 ((ARMOperand*)Operands[3])->addMemImm12OffsetOperands(Inst, 2);
2419 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2423 /// cvtStWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2424 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2425 /// when they refer multiple MIOperands inside a single one.
2427 cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2428 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2429 // Create a writeback register dummy placeholder.
2430 Inst.addOperand(MCOperand::CreateImm(0));
2431 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2432 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2433 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2437 /// cvtStWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
2438 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2439 /// when they refer multiple MIOperands inside a single one.
2441 cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
2442 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2443 // Create a writeback register dummy placeholder.
2444 Inst.addOperand(MCOperand::CreateImm(0));
2445 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2446 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
2447 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2451 /// cvtLdExtTWriteBackImm - Convert parsed operands to MCInst.
2452 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2453 /// when they refer multiple MIOperands inside a single one.
2455 cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2456 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2458 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2459 // Create a writeback register dummy placeholder.
2460 Inst.addOperand(MCOperand::CreateImm(0));
2462 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2464 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2466 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2470 /// cvtLdExtTWriteBackReg - Convert parsed operands to MCInst.
2471 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2472 /// when they refer multiple MIOperands inside a single one.
2474 cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2475 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2477 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2478 // Create a writeback register dummy placeholder.
2479 Inst.addOperand(MCOperand::CreateImm(0));
2481 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2483 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2485 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2489 /// cvtStExtTWriteBackImm - Convert parsed operands to MCInst.
2490 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2491 /// when they refer multiple MIOperands inside a single one.
2493 cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2494 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2495 // Create a writeback register dummy placeholder.
2496 Inst.addOperand(MCOperand::CreateImm(0));
2498 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2500 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2502 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2504 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2508 /// cvtStExtTWriteBackReg - Convert parsed operands to MCInst.
2509 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2510 /// when they refer multiple MIOperands inside a single one.
2512 cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2513 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2514 // Create a writeback register dummy placeholder.
2515 Inst.addOperand(MCOperand::CreateImm(0));
2517 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2519 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2521 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2523 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2527 /// cvtLdrdPre - Convert parsed operands to MCInst.
2528 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2529 /// when they refer multiple MIOperands inside a single one.
2531 cvtLdrdPre(MCInst &Inst, unsigned Opcode,
2532 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2534 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2535 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2536 // Create a writeback register dummy placeholder.
2537 Inst.addOperand(MCOperand::CreateImm(0));
2539 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
2541 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2545 /// cvtStrdPre - Convert parsed operands to MCInst.
2546 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2547 /// when they refer multiple MIOperands inside a single one.
2549 cvtStrdPre(MCInst &Inst, unsigned Opcode,
2550 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2551 // Create a writeback register dummy placeholder.
2552 Inst.addOperand(MCOperand::CreateImm(0));
2554 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2555 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2557 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
2559 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2563 /// cvtLdWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
2564 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2565 /// when they refer multiple MIOperands inside a single one.
2567 cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
2568 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2569 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2570 // Create a writeback register dummy placeholder.
2571 Inst.addOperand(MCOperand::CreateImm(0));
2572 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
2573 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2577 /// cvtThumbMultiple- Convert parsed operands to MCInst.
2578 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2579 /// when they refer multiple MIOperands inside a single one.
2581 cvtThumbMultiply(MCInst &Inst, unsigned Opcode,
2582 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2583 // The second source operand must be the same register as the destination
2585 if (Operands.size() == 6 &&
2586 (((ARMOperand*)Operands[3])->getReg() !=
2587 ((ARMOperand*)Operands[5])->getReg()) &&
2588 (((ARMOperand*)Operands[3])->getReg() !=
2589 ((ARMOperand*)Operands[4])->getReg())) {
2590 Error(Operands[3]->getStartLoc(),
2591 "destination register must match source register");
2594 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2595 ((ARMOperand*)Operands[1])->addCCOutOperands(Inst, 1);
2596 ((ARMOperand*)Operands[4])->addRegOperands(Inst, 1);
2597 // If we have a three-operand form, use that, else the second source operand
2598 // is just the destination operand again.
2599 if (Operands.size() == 6)
2600 ((ARMOperand*)Operands[5])->addRegOperands(Inst, 1);
2602 Inst.addOperand(Inst.getOperand(0));
2603 ((ARMOperand*)Operands[2])->addCondCodeOperands(Inst, 2);
2608 /// Parse an ARM memory expression, return false if successful else return true
2609 /// or an error. The first token must be a '[' when called.
2611 parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2613 assert(Parser.getTok().is(AsmToken::LBrac) &&
2614 "Token is not a Left Bracket");
2615 S = Parser.getTok().getLoc();
2616 Parser.Lex(); // Eat left bracket token.
2618 const AsmToken &BaseRegTok = Parser.getTok();
2619 int BaseRegNum = tryParseRegister();
2620 if (BaseRegNum == -1)
2621 return Error(BaseRegTok.getLoc(), "register expected");
2623 // The next token must either be a comma or a closing bracket.
2624 const AsmToken &Tok = Parser.getTok();
2625 if (!Tok.is(AsmToken::Comma) && !Tok.is(AsmToken::RBrac))
2626 return Error(Tok.getLoc(), "malformed memory operand");
2628 if (Tok.is(AsmToken::RBrac)) {
2630 Parser.Lex(); // Eat right bracket token.
2632 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0, ARM_AM::no_shift,
2638 assert(Tok.is(AsmToken::Comma) && "Lost comma in memory operand?!");
2639 Parser.Lex(); // Eat the comma.
2641 // If we have a '#' it's an immediate offset, else assume it's a register
2643 if (Parser.getTok().is(AsmToken::Hash)) {
2644 Parser.Lex(); // Eat the '#'.
2645 E = Parser.getTok().getLoc();
2647 bool isNegative = getParser().getTok().is(AsmToken::Minus);
2648 const MCExpr *Offset;
2649 if (getParser().ParseExpression(Offset))
2652 // The expression has to be a constant. Memory references with relocations
2653 // don't come through here, as they use the <label> forms of the relevant
2655 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2657 return Error (E, "constant expression expected");
2659 // If the constant was #-0, represent it as INT32_MIN.
2660 int32_t Val = CE->getValue();
2661 if (isNegative && Val == 0)
2662 CE = MCConstantExpr::Create(INT32_MIN, getContext());
2664 // Now we should have the closing ']'
2665 E = Parser.getTok().getLoc();
2666 if (Parser.getTok().isNot(AsmToken::RBrac))
2667 return Error(E, "']' expected");
2668 Parser.Lex(); // Eat right bracket token.
2670 // Don't worry about range checking the value here. That's handled by
2671 // the is*() predicates.
2672 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, CE, 0,
2673 ARM_AM::no_shift, 0, false, S,E));
2675 // If there's a pre-indexing writeback marker, '!', just add it as a token
2677 if (Parser.getTok().is(AsmToken::Exclaim)) {
2678 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2679 Parser.Lex(); // Eat the '!'.
2685 // The register offset is optionally preceded by a '+' or '-'
2686 bool isNegative = false;
2687 if (Parser.getTok().is(AsmToken::Minus)) {
2689 Parser.Lex(); // Eat the '-'.
2690 } else if (Parser.getTok().is(AsmToken::Plus)) {
2692 Parser.Lex(); // Eat the '+'.
2695 E = Parser.getTok().getLoc();
2696 int OffsetRegNum = tryParseRegister();
2697 if (OffsetRegNum == -1)
2698 return Error(E, "register expected");
2700 // If there's a shift operator, handle it.
2701 ARM_AM::ShiftOpc ShiftType = ARM_AM::no_shift;
2702 unsigned ShiftImm = 0;
2703 if (Parser.getTok().is(AsmToken::Comma)) {
2704 Parser.Lex(); // Eat the ','.
2705 if (parseMemRegOffsetShift(ShiftType, ShiftImm))
2709 // Now we should have the closing ']'
2710 E = Parser.getTok().getLoc();
2711 if (Parser.getTok().isNot(AsmToken::RBrac))
2712 return Error(E, "']' expected");
2713 Parser.Lex(); // Eat right bracket token.
2715 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, OffsetRegNum,
2716 ShiftType, ShiftImm, isNegative,
2719 // If there's a pre-indexing writeback marker, '!', just add it as a token
2721 if (Parser.getTok().is(AsmToken::Exclaim)) {
2722 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2723 Parser.Lex(); // Eat the '!'.
2729 /// parseMemRegOffsetShift - one of these two:
2730 /// ( lsl | lsr | asr | ror ) , # shift_amount
2732 /// return true if it parses a shift otherwise it returns false.
2733 bool ARMAsmParser::parseMemRegOffsetShift(ARM_AM::ShiftOpc &St,
2735 SMLoc Loc = Parser.getTok().getLoc();
2736 const AsmToken &Tok = Parser.getTok();
2737 if (Tok.isNot(AsmToken::Identifier))
2739 StringRef ShiftName = Tok.getString();
2740 if (ShiftName == "lsl" || ShiftName == "LSL")
2742 else if (ShiftName == "lsr" || ShiftName == "LSR")
2744 else if (ShiftName == "asr" || ShiftName == "ASR")
2746 else if (ShiftName == "ror" || ShiftName == "ROR")
2748 else if (ShiftName == "rrx" || ShiftName == "RRX")
2751 return Error(Loc, "illegal shift operator");
2752 Parser.Lex(); // Eat shift type token.
2754 // rrx stands alone.
2756 if (St != ARM_AM::rrx) {
2757 Loc = Parser.getTok().getLoc();
2758 // A '#' and a shift amount.
2759 const AsmToken &HashTok = Parser.getTok();
2760 if (HashTok.isNot(AsmToken::Hash))
2761 return Error(HashTok.getLoc(), "'#' expected");
2762 Parser.Lex(); // Eat hash token.
2765 if (getParser().ParseExpression(Expr))
2767 // Range check the immediate.
2768 // lsl, ror: 0 <= imm <= 31
2769 // lsr, asr: 0 <= imm <= 32
2770 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
2772 return Error(Loc, "shift amount must be an immediate");
2773 int64_t Imm = CE->getValue();
2775 ((St == ARM_AM::lsl || St == ARM_AM::ror) && Imm > 31) ||
2776 ((St == ARM_AM::lsr || St == ARM_AM::asr) && Imm > 32))
2777 return Error(Loc, "immediate shift value out of range");
2784 /// Parse a arm instruction operand. For now this parses the operand regardless
2785 /// of the mnemonic.
2786 bool ARMAsmParser::parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2787 StringRef Mnemonic) {
2790 // Check if the current operand has a custom associated parser, if so, try to
2791 // custom parse the operand, or fallback to the general approach.
2792 OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
2793 if (ResTy == MatchOperand_Success)
2795 // If there wasn't a custom match, try the generic matcher below. Otherwise,
2796 // there was a match, but an error occurred, in which case, just return that
2797 // the operand parsing failed.
2798 if (ResTy == MatchOperand_ParseFail)
2801 switch (getLexer().getKind()) {
2803 Error(Parser.getTok().getLoc(), "unexpected token in operand");
2805 case AsmToken::Identifier: {
2806 if (!tryParseRegisterWithWriteBack(Operands))
2808 int Res = tryParseShiftRegister(Operands);
2809 if (Res == 0) // success
2811 else if (Res == -1) // irrecoverable error
2814 // Fall though for the Identifier case that is not a register or a
2817 case AsmToken::Integer: // things like 1f and 2b as a branch targets
2818 case AsmToken::Dot: { // . as a branch target
2819 // This was not a register so parse other operands that start with an
2820 // identifier (like labels) as expressions and create them as immediates.
2821 const MCExpr *IdVal;
2822 S = Parser.getTok().getLoc();
2823 if (getParser().ParseExpression(IdVal))
2825 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2826 Operands.push_back(ARMOperand::CreateImm(IdVal, S, E));
2829 case AsmToken::LBrac:
2830 return parseMemory(Operands);
2831 case AsmToken::LCurly:
2832 return parseRegisterList(Operands);
2833 case AsmToken::Hash: {
2834 // #42 -> immediate.
2835 // TODO: ":lower16:" and ":upper16:" modifiers after # before immediate
2836 S = Parser.getTok().getLoc();
2838 bool isNegative = Parser.getTok().is(AsmToken::Minus);
2839 const MCExpr *ImmVal;
2840 if (getParser().ParseExpression(ImmVal))
2842 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ImmVal);
2844 Error(S, "constant expression expected");
2845 return MatchOperand_ParseFail;
2847 int32_t Val = CE->getValue();
2848 if (isNegative && Val == 0)
2849 ImmVal = MCConstantExpr::Create(INT32_MIN, getContext());
2850 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2851 Operands.push_back(ARMOperand::CreateImm(ImmVal, S, E));
2854 case AsmToken::Colon: {
2855 // ":lower16:" and ":upper16:" expression prefixes
2856 // FIXME: Check it's an expression prefix,
2857 // e.g. (FOO - :lower16:BAR) isn't legal.
2858 ARMMCExpr::VariantKind RefKind;
2859 if (parsePrefix(RefKind))
2862 const MCExpr *SubExprVal;
2863 if (getParser().ParseExpression(SubExprVal))
2866 const MCExpr *ExprVal = ARMMCExpr::Create(RefKind, SubExprVal,
2868 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2869 Operands.push_back(ARMOperand::CreateImm(ExprVal, S, E));
2875 // parsePrefix - Parse ARM 16-bit relocations expression prefix, i.e.
2876 // :lower16: and :upper16:.
2877 bool ARMAsmParser::parsePrefix(ARMMCExpr::VariantKind &RefKind) {
2878 RefKind = ARMMCExpr::VK_ARM_None;
2880 // :lower16: and :upper16: modifiers
2881 assert(getLexer().is(AsmToken::Colon) && "expected a :");
2882 Parser.Lex(); // Eat ':'
2884 if (getLexer().isNot(AsmToken::Identifier)) {
2885 Error(Parser.getTok().getLoc(), "expected prefix identifier in operand");
2889 StringRef IDVal = Parser.getTok().getIdentifier();
2890 if (IDVal == "lower16") {
2891 RefKind = ARMMCExpr::VK_ARM_LO16;
2892 } else if (IDVal == "upper16") {
2893 RefKind = ARMMCExpr::VK_ARM_HI16;
2895 Error(Parser.getTok().getLoc(), "unexpected prefix in operand");
2900 if (getLexer().isNot(AsmToken::Colon)) {
2901 Error(Parser.getTok().getLoc(), "unexpected token after prefix");
2904 Parser.Lex(); // Eat the last ':'
2909 ARMAsmParser::applyPrefixToExpr(const MCExpr *E,
2910 MCSymbolRefExpr::VariantKind Variant) {
2911 // Recurse over the given expression, rebuilding it to apply the given variant
2912 // to the leftmost symbol.
2913 if (Variant == MCSymbolRefExpr::VK_None)
2916 switch (E->getKind()) {
2917 case MCExpr::Target:
2918 llvm_unreachable("Can't handle target expr yet");
2919 case MCExpr::Constant:
2920 llvm_unreachable("Can't handle lower16/upper16 of constant yet");
2922 case MCExpr::SymbolRef: {
2923 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
2925 if (SRE->getKind() != MCSymbolRefExpr::VK_None)
2928 return MCSymbolRefExpr::Create(&SRE->getSymbol(), Variant, getContext());
2932 llvm_unreachable("Can't handle unary expressions yet");
2934 case MCExpr::Binary: {
2935 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
2936 const MCExpr *LHS = applyPrefixToExpr(BE->getLHS(), Variant);
2937 const MCExpr *RHS = BE->getRHS();
2941 return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, getContext());
2945 assert(0 && "Invalid expression kind!");
2949 /// \brief Given a mnemonic, split out possible predication code and carry
2950 /// setting letters to form a canonical mnemonic and flags.
2952 // FIXME: Would be nice to autogen this.
2953 // FIXME: This is a bit of a maze of special cases.
2954 StringRef ARMAsmParser::splitMnemonic(StringRef Mnemonic,
2955 unsigned &PredicationCode,
2957 unsigned &ProcessorIMod,
2958 StringRef &ITMask) {
2959 PredicationCode = ARMCC::AL;
2960 CarrySetting = false;
2963 // Ignore some mnemonics we know aren't predicated forms.
2965 // FIXME: Would be nice to autogen this.
2966 if ((Mnemonic == "movs" && isThumb()) ||
2967 Mnemonic == "teq" || Mnemonic == "vceq" || Mnemonic == "svc" ||
2968 Mnemonic == "mls" || Mnemonic == "smmls" || Mnemonic == "vcls" ||
2969 Mnemonic == "vmls" || Mnemonic == "vnmls" || Mnemonic == "vacge" ||
2970 Mnemonic == "vcge" || Mnemonic == "vclt" || Mnemonic == "vacgt" ||
2971 Mnemonic == "vcgt" || Mnemonic == "vcle" || Mnemonic == "smlal" ||
2972 Mnemonic == "umaal" || Mnemonic == "umlal" || Mnemonic == "vabal" ||
2973 Mnemonic == "vmlal" || Mnemonic == "vpadal" || Mnemonic == "vqdmlal")
2976 // First, split out any predication code. Ignore mnemonics we know aren't
2977 // predicated but do have a carry-set and so weren't caught above.
2978 if (Mnemonic != "adcs" && Mnemonic != "bics" && Mnemonic != "movs" &&
2979 Mnemonic != "muls" && Mnemonic != "smlals" && Mnemonic != "smulls" &&
2980 Mnemonic != "umlals" && Mnemonic != "umulls" && Mnemonic != "lsls" &&
2981 Mnemonic != "sbcs" && Mnemonic != "rscs") {
2982 unsigned CC = StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2))
2983 .Case("eq", ARMCC::EQ)
2984 .Case("ne", ARMCC::NE)
2985 .Case("hs", ARMCC::HS)
2986 .Case("cs", ARMCC::HS)
2987 .Case("lo", ARMCC::LO)
2988 .Case("cc", ARMCC::LO)
2989 .Case("mi", ARMCC::MI)
2990 .Case("pl", ARMCC::PL)
2991 .Case("vs", ARMCC::VS)
2992 .Case("vc", ARMCC::VC)
2993 .Case("hi", ARMCC::HI)
2994 .Case("ls", ARMCC::LS)
2995 .Case("ge", ARMCC::GE)
2996 .Case("lt", ARMCC::LT)
2997 .Case("gt", ARMCC::GT)
2998 .Case("le", ARMCC::LE)
2999 .Case("al", ARMCC::AL)
3002 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 2);
3003 PredicationCode = CC;
3007 // Next, determine if we have a carry setting bit. We explicitly ignore all
3008 // the instructions we know end in 's'.
3009 if (Mnemonic.endswith("s") &&
3010 !(Mnemonic == "cps" || Mnemonic == "mls" ||
3011 Mnemonic == "mrs" || Mnemonic == "smmls" || Mnemonic == "vabs" ||
3012 Mnemonic == "vcls" || Mnemonic == "vmls" || Mnemonic == "vmrs" ||
3013 Mnemonic == "vnmls" || Mnemonic == "vqabs" || Mnemonic == "vrecps" ||
3014 Mnemonic == "vrsqrts" || Mnemonic == "srs" ||
3015 (Mnemonic == "movs" && isThumb()))) {
3016 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 1);
3017 CarrySetting = true;
3020 // The "cps" instruction can have a interrupt mode operand which is glued into
3021 // the mnemonic. Check if this is the case, split it and parse the imod op
3022 if (Mnemonic.startswith("cps")) {
3023 // Split out any imod code.
3025 StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2, 2))
3026 .Case("ie", ARM_PROC::IE)
3027 .Case("id", ARM_PROC::ID)
3030 Mnemonic = Mnemonic.slice(0, Mnemonic.size()-2);
3031 ProcessorIMod = IMod;
3035 // The "it" instruction has the condition mask on the end of the mnemonic.
3036 if (Mnemonic.startswith("it")) {
3037 ITMask = Mnemonic.slice(2, Mnemonic.size());
3038 Mnemonic = Mnemonic.slice(0, 2);
3044 /// \brief Given a canonical mnemonic, determine if the instruction ever allows
3045 /// inclusion of carry set or predication code operands.
3047 // FIXME: It would be nice to autogen this.
3049 getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
3050 bool &CanAcceptPredicationCode) {
3051 if (Mnemonic == "and" || Mnemonic == "lsl" || Mnemonic == "lsr" ||
3052 Mnemonic == "rrx" || Mnemonic == "ror" || Mnemonic == "sub" ||
3053 Mnemonic == "smull" || Mnemonic == "add" || Mnemonic == "adc" ||
3054 Mnemonic == "mul" || Mnemonic == "bic" || Mnemonic == "asr" ||
3055 Mnemonic == "umlal" || Mnemonic == "orr" || Mnemonic == "mvn" ||
3056 Mnemonic == "rsb" || Mnemonic == "rsc" || Mnemonic == "orn" ||
3057 Mnemonic == "sbc" || Mnemonic == "mla" || Mnemonic == "umull" ||
3058 Mnemonic == "eor" || Mnemonic == "smlal" || Mnemonic == "neg" ||
3059 (Mnemonic == "mov" && !isThumb())) {
3060 CanAcceptCarrySet = true;
3062 CanAcceptCarrySet = false;
3065 if (Mnemonic == "cbnz" || Mnemonic == "setend" || Mnemonic == "dmb" ||
3066 Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
3067 Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
3068 Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
3069 Mnemonic == "dsb" || Mnemonic == "isb" || Mnemonic == "setend" ||
3070 (Mnemonic == "clrex" && !isThumb()) ||
3071 (Mnemonic == "nop" && isThumbOne()) ||
3072 ((Mnemonic == "pld" || Mnemonic == "pli" || Mnemonic == "pldw") &&
3074 ((Mnemonic.startswith("rfe") || Mnemonic.startswith("srs")) &&
3076 Mnemonic.startswith("cps") || (Mnemonic == "movs" && isThumb())) {
3077 CanAcceptPredicationCode = false;
3079 CanAcceptPredicationCode = true;
3083 if (Mnemonic == "bkpt" || Mnemonic == "mcr" || Mnemonic == "mcrr" ||
3084 Mnemonic == "mrc" || Mnemonic == "mrrc" || Mnemonic == "cdp")
3085 CanAcceptPredicationCode = false;
3088 bool ARMAsmParser::shouldOmitCCOutOperand(StringRef Mnemonic,
3089 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3090 // FIXME: This is all horribly hacky. We really need a better way to deal
3091 // with optional operands like this in the matcher table.
3093 // The 'mov' mnemonic is special. One variant has a cc_out operand, while
3094 // another does not. Specifically, the MOVW instruction does not. So we
3095 // special case it here and remove the defaulted (non-setting) cc_out
3096 // operand if that's the instruction we're trying to match.
3098 // We do this as post-processing of the explicit operands rather than just
3099 // conditionally adding the cc_out in the first place because we need
3100 // to check the type of the parsed immediate operand.
3101 if (Mnemonic == "mov" && Operands.size() > 4 &&
3102 !static_cast<ARMOperand*>(Operands[4])->isARMSOImm() &&
3103 static_cast<ARMOperand*>(Operands[4])->isImm0_65535Expr() &&
3104 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
3107 // Register-register 'add' for thumb does not have a cc_out operand
3108 // when there are only two register operands.
3109 if (isThumb() && Mnemonic == "add" && Operands.size() == 5 &&
3110 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3111 static_cast<ARMOperand*>(Operands[4])->isReg() &&
3112 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
3114 // Register-register 'add' for thumb does not have a cc_out operand
3115 // when it's an ADD Rdm, SP, {Rdm|#imm0_255} instruction. We do
3116 // have to check the immediate range here since Thumb2 has a variant
3117 // that can handle a different range and has a cc_out operand.
3118 if (isThumb() && Mnemonic == "add" && Operands.size() == 6 &&
3119 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3120 static_cast<ARMOperand*>(Operands[4])->isReg() &&
3121 static_cast<ARMOperand*>(Operands[4])->getReg() == ARM::SP &&
3122 static_cast<ARMOperand*>(Operands[1])->getReg() == 0 &&
3123 (static_cast<ARMOperand*>(Operands[5])->isReg() ||
3124 static_cast<ARMOperand*>(Operands[5])->isImm0_1020s4()))
3126 // For Thumb2, add immediate does not have a cc_out operand for the
3127 // imm0_4096 variant. That's the least-preferred variant when
3128 // selecting via the generic "add" mnemonic, so to know that we
3129 // should remove the cc_out operand, we have to explicitly check that
3130 // it's not one of the other variants. Ugh.
3131 if (isThumbTwo() && Mnemonic == "add" && Operands.size() == 6 &&
3132 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3133 static_cast<ARMOperand*>(Operands[4])->isReg() &&
3134 static_cast<ARMOperand*>(Operands[5])->isImm()) {
3135 // Nest conditions rather than one big 'if' statement for readability.
3137 // If either register is a high reg, it's either one of the SP
3138 // variants (handled above) or a 32-bit encoding, so we just
3139 // check against T3.
3140 if ((!isARMLowRegister(static_cast<ARMOperand*>(Operands[3])->getReg()) ||
3141 !isARMLowRegister(static_cast<ARMOperand*>(Operands[4])->getReg())) &&
3142 static_cast<ARMOperand*>(Operands[5])->isT2SOImm())
3144 // If both registers are low, we're in an IT block, and the immediate is
3145 // in range, we should use encoding T1 instead, which has a cc_out.
3147 isARMLowRegister(static_cast<ARMOperand*>(Operands[4])->getReg()) &&
3148 isARMLowRegister(static_cast<ARMOperand*>(Operands[4])->getReg()) &&
3149 static_cast<ARMOperand*>(Operands[5])->isImm0_7())
3152 // Otherwise, we use encoding T4, which does not have a cc_out
3158 // Register-register 'add/sub' for thumb does not have a cc_out operand
3159 // when it's an ADD/SUB SP, #imm. Be lenient on count since there's also
3160 // the "add/sub SP, SP, #imm" version. If the follow-up operands aren't
3161 // right, this will result in better diagnostics (which operand is off)
3163 if (isThumb() && (Mnemonic == "add" || Mnemonic == "sub") &&
3164 (Operands.size() == 5 || Operands.size() == 6) &&
3165 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3166 static_cast<ARMOperand*>(Operands[3])->getReg() == ARM::SP &&
3167 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
3173 /// Parse an arm instruction mnemonic followed by its operands.
3174 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
3175 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3176 // Create the leading tokens for the mnemonic, split by '.' characters.
3177 size_t Start = 0, Next = Name.find('.');
3178 StringRef Mnemonic = Name.slice(Start, Next);
3180 // Split out the predication code and carry setting flag from the mnemonic.
3181 unsigned PredicationCode;
3182 unsigned ProcessorIMod;
3185 Mnemonic = splitMnemonic(Mnemonic, PredicationCode, CarrySetting,
3186 ProcessorIMod, ITMask);
3188 // In Thumb1, only the branch (B) instruction can be predicated.
3189 if (isThumbOne() && PredicationCode != ARMCC::AL && Mnemonic != "b") {
3190 Parser.EatToEndOfStatement();
3191 return Error(NameLoc, "conditional execution not supported in Thumb1");
3194 Operands.push_back(ARMOperand::CreateToken(Mnemonic, NameLoc));
3196 // Handle the IT instruction ITMask. Convert it to a bitmask. This
3197 // is the mask as it will be for the IT encoding if the conditional
3198 // encoding has a '1' as it's bit0 (i.e. 't' ==> '1'). In the case
3199 // where the conditional bit0 is zero, the instruction post-processing
3200 // will adjust the mask accordingly.
3201 if (Mnemonic == "it") {
3202 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + 2);
3203 if (ITMask.size() > 3) {
3204 Parser.EatToEndOfStatement();
3205 return Error(Loc, "too many conditions on IT instruction");
3208 for (unsigned i = ITMask.size(); i != 0; --i) {
3209 char pos = ITMask[i - 1];
3210 if (pos != 't' && pos != 'e') {
3211 Parser.EatToEndOfStatement();
3212 return Error(Loc, "illegal IT block condition mask '" + ITMask + "'");
3215 if (ITMask[i - 1] == 't')
3218 Operands.push_back(ARMOperand::CreateITMask(Mask, Loc));
3221 // FIXME: This is all a pretty gross hack. We should automatically handle
3222 // optional operands like this via tblgen.
3224 // Next, add the CCOut and ConditionCode operands, if needed.
3226 // For mnemonics which can ever incorporate a carry setting bit or predication
3227 // code, our matching model involves us always generating CCOut and
3228 // ConditionCode operands to match the mnemonic "as written" and then we let
3229 // the matcher deal with finding the right instruction or generating an
3230 // appropriate error.
3231 bool CanAcceptCarrySet, CanAcceptPredicationCode;
3232 getMnemonicAcceptInfo(Mnemonic, CanAcceptCarrySet, CanAcceptPredicationCode);
3234 // If we had a carry-set on an instruction that can't do that, issue an
3236 if (!CanAcceptCarrySet && CarrySetting) {
3237 Parser.EatToEndOfStatement();
3238 return Error(NameLoc, "instruction '" + Mnemonic +
3239 "' can not set flags, but 's' suffix specified");
3241 // If we had a predication code on an instruction that can't do that, issue an
3243 if (!CanAcceptPredicationCode && PredicationCode != ARMCC::AL) {
3244 Parser.EatToEndOfStatement();
3245 return Error(NameLoc, "instruction '" + Mnemonic +
3246 "' is not predicable, but condition code specified");
3249 // Add the carry setting operand, if necessary.
3250 if (CanAcceptCarrySet) {
3251 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + Mnemonic.size());
3252 Operands.push_back(ARMOperand::CreateCCOut(CarrySetting ? ARM::CPSR : 0,
3256 // Add the predication code operand, if necessary.
3257 if (CanAcceptPredicationCode) {
3258 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + Mnemonic.size() +
3260 Operands.push_back(ARMOperand::CreateCondCode(
3261 ARMCC::CondCodes(PredicationCode), Loc));
3264 // Add the processor imod operand, if necessary.
3265 if (ProcessorIMod) {
3266 Operands.push_back(ARMOperand::CreateImm(
3267 MCConstantExpr::Create(ProcessorIMod, getContext()),
3271 // Add the remaining tokens in the mnemonic.
3272 while (Next != StringRef::npos) {
3274 Next = Name.find('.', Start + 1);
3275 StringRef ExtraToken = Name.slice(Start, Next);
3277 // For now, we're only parsing Thumb1 (for the most part), so
3278 // just ignore ".n" qualifiers. We'll use them to restrict
3279 // matching when we do Thumb2.
3280 if (ExtraToken != ".n") {
3281 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + Start);
3282 Operands.push_back(ARMOperand::CreateToken(ExtraToken, Loc));
3286 // Read the remaining operands.
3287 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3288 // Read the first operand.
3289 if (parseOperand(Operands, Mnemonic)) {
3290 Parser.EatToEndOfStatement();
3294 while (getLexer().is(AsmToken::Comma)) {
3295 Parser.Lex(); // Eat the comma.
3297 // Parse and remember the operand.
3298 if (parseOperand(Operands, Mnemonic)) {
3299 Parser.EatToEndOfStatement();
3305 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3306 Parser.EatToEndOfStatement();
3307 return TokError("unexpected token in argument list");
3310 Parser.Lex(); // Consume the EndOfStatement
3312 // Some instructions, mostly Thumb, have forms for the same mnemonic that
3313 // do and don't have a cc_out optional-def operand. With some spot-checks
3314 // of the operand list, we can figure out which variant we're trying to
3315 // parse and adjust accordingly before actually matching. We shouldn't ever
3316 // try to remove a cc_out operand that was explicitly set on the the
3317 // mnemonic, of course (CarrySetting == true). Reason number #317 the
3318 // table driven matcher doesn't fit well with the ARM instruction set.
3319 if (!CarrySetting && shouldOmitCCOutOperand(Mnemonic, Operands)) {
3320 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
3321 Operands.erase(Operands.begin() + 1);
3325 // ARM mode 'blx' need special handling, as the register operand version
3326 // is predicable, but the label operand version is not. So, we can't rely
3327 // on the Mnemonic based checking to correctly figure out when to put
3328 // a CondCode operand in the list. If we're trying to match the label
3329 // version, remove the CondCode operand here.
3330 if (!isThumb() && Mnemonic == "blx" && Operands.size() == 3 &&
3331 static_cast<ARMOperand*>(Operands[2])->isImm()) {
3332 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
3333 Operands.erase(Operands.begin() + 1);
3337 // The vector-compare-to-zero instructions have a literal token "#0" at
3338 // the end that comes to here as an immediate operand. Convert it to a
3339 // token to play nicely with the matcher.
3340 if ((Mnemonic == "vceq" || Mnemonic == "vcge" || Mnemonic == "vcgt" ||
3341 Mnemonic == "vcle" || Mnemonic == "vclt") && Operands.size() == 6 &&
3342 static_cast<ARMOperand*>(Operands[5])->isImm()) {
3343 ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
3344 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
3345 if (CE && CE->getValue() == 0) {
3346 Operands.erase(Operands.begin() + 5);
3347 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
3351 // Similarly, the Thumb1 "RSB" instruction has a literal "#0" on the
3352 // end. Convert it to a token here.
3353 if (Mnemonic == "rsb" && isThumb() && Operands.size() == 6 &&
3354 static_cast<ARMOperand*>(Operands[5])->isImm()) {
3355 ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
3356 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
3357 if (CE && CE->getValue() == 0) {
3358 Operands.erase(Operands.begin() + 5);
3359 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
3367 // Validate context-sensitive operand constraints.
3369 // return 'true' if register list contains non-low GPR registers,
3370 // 'false' otherwise. If Reg is in the register list or is HiReg, set
3371 // 'containsReg' to true.
3372 static bool checkLowRegisterList(MCInst Inst, unsigned OpNo, unsigned Reg,
3373 unsigned HiReg, bool &containsReg) {
3374 containsReg = false;
3375 for (unsigned i = OpNo; i < Inst.getNumOperands(); ++i) {
3376 unsigned OpReg = Inst.getOperand(i).getReg();
3379 // Anything other than a low register isn't legal here.
3380 if (!isARMLowRegister(OpReg) && (!HiReg || OpReg != HiReg))
3386 // Check if the specified regisgter is in the register list of the inst,
3387 // starting at the indicated operand number.
3388 static bool listContainsReg(MCInst &Inst, unsigned OpNo, unsigned Reg) {
3389 for (unsigned i = OpNo; i < Inst.getNumOperands(); ++i) {
3390 unsigned OpReg = Inst.getOperand(i).getReg();
3397 // FIXME: We would really prefer to have MCInstrInfo (the wrapper around
3398 // the ARMInsts array) instead. Getting that here requires awkward
3399 // API changes, though. Better way?
3401 extern MCInstrDesc ARMInsts[];
3403 static MCInstrDesc &getInstDesc(unsigned Opcode) {
3404 return ARMInsts[Opcode];
3407 // FIXME: We would really like to be able to tablegen'erate this.
3409 validateInstruction(MCInst &Inst,
3410 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3411 MCInstrDesc &MCID = getInstDesc(Inst.getOpcode());
3412 SMLoc Loc = Operands[0]->getStartLoc();
3413 // Check the IT block state first.
3416 if (ITState.FirstCond)
3417 ITState.FirstCond = false;
3419 bit = (ITState.Mask >> (5 - ITState.CurPosition)) & 1;
3420 // The instruction must be predicable.
3421 if (!MCID.isPredicable())
3422 return Error(Loc, "instructions in IT block must be predicable");
3423 unsigned Cond = Inst.getOperand(MCID.findFirstPredOperandIdx()).getImm();
3424 unsigned ITCond = bit ? ITState.Cond :
3425 ARMCC::getOppositeCondition(ITState.Cond);
3426 if (Cond != ITCond) {
3427 // Find the condition code Operand to get its SMLoc information.
3429 for (unsigned i = 1; i < Operands.size(); ++i)
3430 if (static_cast<ARMOperand*>(Operands[i])->isCondCode())
3431 CondLoc = Operands[i]->getStartLoc();
3432 return Error(CondLoc, "incorrect condition in IT block; got '" +
3433 StringRef(ARMCondCodeToString(ARMCC::CondCodes(Cond))) +
3434 "', but expected '" +
3435 ARMCondCodeToString(ARMCC::CondCodes(ITCond)) + "'");
3437 // Check for non-'al' condition codes outside of the IT block.
3438 } else if (isThumbTwo() && MCID.isPredicable() &&
3439 Inst.getOperand(MCID.findFirstPredOperandIdx()).getImm() !=
3440 ARMCC::AL && Inst.getOpcode() != ARM::tBcc &&
3441 Inst.getOpcode() != ARM::t2Bcc)
3442 return Error(Loc, "predicated instructions must be in IT block");
3444 switch (Inst.getOpcode()) {
3447 case ARM::LDRD_POST:
3449 // Rt2 must be Rt + 1.
3450 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
3451 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3453 return Error(Operands[3]->getStartLoc(),
3454 "destination operands must be sequential");
3458 // Rt2 must be Rt + 1.
3459 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
3460 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3462 return Error(Operands[3]->getStartLoc(),
3463 "source operands must be sequential");
3467 case ARM::STRD_POST:
3469 // Rt2 must be Rt + 1.
3470 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3471 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(2).getReg());
3473 return Error(Operands[3]->getStartLoc(),
3474 "source operands must be sequential");
3479 // width must be in range [1, 32-lsb]
3480 unsigned lsb = Inst.getOperand(2).getImm();
3481 unsigned widthm1 = Inst.getOperand(3).getImm();
3482 if (widthm1 >= 32 - lsb)
3483 return Error(Operands[5]->getStartLoc(),
3484 "bitfield width must be in range [1,32-lsb]");
3488 // If we're parsing Thumb2, the .w variant is available and handles
3489 // most cases that are normally illegal for a Thumb1 LDM
3490 // instruction. We'll make the transformation in processInstruction()
3493 // Thumb LDM instructions are writeback iff the base register is not
3494 // in the register list.
3495 unsigned Rn = Inst.getOperand(0).getReg();
3496 bool hasWritebackToken =
3497 (static_cast<ARMOperand*>(Operands[3])->isToken() &&
3498 static_cast<ARMOperand*>(Operands[3])->getToken() == "!");
3499 bool listContainsBase;
3500 if (checkLowRegisterList(Inst, 3, Rn, 0, listContainsBase) && !isThumbTwo())
3501 return Error(Operands[3 + hasWritebackToken]->getStartLoc(),
3502 "registers must be in range r0-r7");
3503 // If we should have writeback, then there should be a '!' token.
3504 if (!listContainsBase && !hasWritebackToken && !isThumbTwo())
3505 return Error(Operands[2]->getStartLoc(),
3506 "writeback operator '!' expected");
3507 // If we should not have writeback, there must not be a '!'. This is
3508 // true even for the 32-bit wide encodings.
3509 if (listContainsBase && hasWritebackToken)
3510 return Error(Operands[3]->getStartLoc(),
3511 "writeback operator '!' not allowed when base register "
3512 "in register list");
3516 case ARM::t2LDMIA_UPD: {
3517 if (listContainsReg(Inst, 3, Inst.getOperand(0).getReg()))
3518 return Error(Operands[4]->getStartLoc(),
3519 "writeback operator '!' not allowed when base register "
3520 "in register list");
3524 bool listContainsBase;
3525 if (checkLowRegisterList(Inst, 3, 0, ARM::PC, listContainsBase))
3526 return Error(Operands[2]->getStartLoc(),
3527 "registers must be in range r0-r7 or pc");
3531 bool listContainsBase;
3532 if (checkLowRegisterList(Inst, 3, 0, ARM::LR, listContainsBase))
3533 return Error(Operands[2]->getStartLoc(),
3534 "registers must be in range r0-r7 or lr");
3537 case ARM::tSTMIA_UPD: {
3538 bool listContainsBase;
3539 if (checkLowRegisterList(Inst, 4, 0, 0, listContainsBase))
3540 return Error(Operands[4]->getStartLoc(),
3541 "registers must be in range r0-r7");
3550 processInstruction(MCInst &Inst,
3551 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3552 switch (Inst.getOpcode()) {
3553 case ARM::LDMIA_UPD:
3554 // If this is a load of a single register via a 'pop', then we should use
3555 // a post-indexed LDR instruction instead, per the ARM ARM.
3556 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "pop" &&
3557 Inst.getNumOperands() == 5) {
3559 TmpInst.setOpcode(ARM::LDR_POST_IMM);
3560 TmpInst.addOperand(Inst.getOperand(4)); // Rt
3561 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
3562 TmpInst.addOperand(Inst.getOperand(1)); // Rn
3563 TmpInst.addOperand(MCOperand::CreateReg(0)); // am2offset
3564 TmpInst.addOperand(MCOperand::CreateImm(4));
3565 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
3566 TmpInst.addOperand(Inst.getOperand(3));
3570 case ARM::STMDB_UPD:
3571 // If this is a store of a single register via a 'push', then we should use
3572 // a pre-indexed STR instruction instead, per the ARM ARM.
3573 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "push" &&
3574 Inst.getNumOperands() == 5) {
3576 TmpInst.setOpcode(ARM::STR_PRE_IMM);
3577 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
3578 TmpInst.addOperand(Inst.getOperand(4)); // Rt
3579 TmpInst.addOperand(Inst.getOperand(1)); // addrmode_imm12
3580 TmpInst.addOperand(MCOperand::CreateImm(-4));
3581 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
3582 TmpInst.addOperand(Inst.getOperand(3));
3587 // If the immediate is in the range 0-7, we want tADDi3 iff Rd was
3588 // explicitly specified. From the ARM ARM: "Encoding T1 is preferred
3589 // to encoding T2 if <Rd> is specified and encoding T2 is preferred
3590 // to encoding T1 if <Rd> is omitted."
3591 if (Inst.getOperand(3).getImm() < 8 && Operands.size() == 6)
3592 Inst.setOpcode(ARM::tADDi3);
3595 // If the conditional is AL or we're in an IT block, we really want t2B.
3596 if (Inst.getOperand(1).getImm() == ARMCC::AL || inITBlock())
3597 Inst.setOpcode(ARM::t2B);
3600 // If the conditional is AL, we really want tB.
3601 if (Inst.getOperand(1).getImm() == ARMCC::AL)
3602 Inst.setOpcode(ARM::tB);
3605 // If the register list contains any high registers, or if the writeback
3606 // doesn't match what tLDMIA can do, we need to use the 32-bit encoding
3607 // instead if we're in Thumb2. Otherwise, this should have generated
3608 // an error in validateInstruction().
3609 unsigned Rn = Inst.getOperand(0).getReg();
3610 bool hasWritebackToken =
3611 (static_cast<ARMOperand*>(Operands[3])->isToken() &&
3612 static_cast<ARMOperand*>(Operands[3])->getToken() == "!");
3613 bool listContainsBase;
3614 if (checkLowRegisterList(Inst, 3, Rn, 0, listContainsBase) ||
3615 (!listContainsBase && !hasWritebackToken) ||
3616 (listContainsBase && hasWritebackToken)) {
3617 // 16-bit encoding isn't sufficient. Switch to the 32-bit version.
3618 assert (isThumbTwo());
3619 Inst.setOpcode(hasWritebackToken ? ARM::t2LDMIA_UPD : ARM::t2LDMIA);
3620 // If we're switching to the updating version, we need to insert
3621 // the writeback tied operand.
3622 if (hasWritebackToken)
3623 Inst.insert(Inst.begin(),
3624 MCOperand::CreateReg(Inst.getOperand(0).getReg()));
3629 // The mask bits for all but the first condition are represented as
3630 // the low bit of the condition code value implies 't'. We currently
3631 // always have 1 implies 't', so XOR toggle the bits if the low bit
3632 // of the condition code is zero. The encoding also expects the low
3633 // bit of the condition to be encoded as bit 4 of the mask operand,
3634 // so mask that in if needed
3635 MCOperand &MO = Inst.getOperand(1);
3636 unsigned Mask = MO.getImm();
3637 unsigned OrigMask = Mask;
3638 unsigned TZ = CountTrailingZeros_32(Mask);
3639 if ((Inst.getOperand(0).getImm() & 1) == 0) {
3640 assert(Mask && TZ <= 3 && "illegal IT mask value!");
3641 for (unsigned i = 3; i != TZ; --i)
3647 // Set up the IT block state according to the IT instruction we just
3649 assert(!inITBlock() && "nested IT blocks?!");
3650 ITState.Cond = ARMCC::CondCodes(Inst.getOperand(0).getImm());
3651 ITState.Mask = OrigMask; // Use the original mask, not the updated one.
3652 ITState.CurPosition = 0;
3653 ITState.FirstCond = true;
3659 unsigned ARMAsmParser::checkTargetMatchPredicate(MCInst &Inst) {
3660 // 16-bit thumb arithmetic instructions either require or preclude the 'S'
3661 // suffix depending on whether they're in an IT block or not.
3662 unsigned Opc = Inst.getOpcode();
3663 MCInstrDesc &MCID = getInstDesc(Opc);
3664 if (MCID.TSFlags & ARMII::ThumbArithFlagSetting) {
3665 assert(MCID.hasOptionalDef() &&
3666 "optionally flag setting instruction missing optional def operand");
3667 assert(MCID.NumOperands == Inst.getNumOperands() &&
3668 "operand count mismatch!");
3669 // Find the optional-def operand (cc_out).
3672 !MCID.OpInfo[OpNo].isOptionalDef() && OpNo < MCID.NumOperands;
3675 // If we're parsing Thumb1, reject it completely.
3676 if (isThumbOne() && Inst.getOperand(OpNo).getReg() != ARM::CPSR)
3677 return Match_MnemonicFail;
3678 // If we're parsing Thumb2, which form is legal depends on whether we're
3680 if (isThumbTwo() && Inst.getOperand(OpNo).getReg() != ARM::CPSR &&
3682 return Match_RequiresITBlock;
3683 if (isThumbTwo() && Inst.getOperand(OpNo).getReg() == ARM::CPSR &&
3685 return Match_RequiresNotITBlock;
3687 // Some high-register supporting Thumb1 encodings only allow both registers
3688 // to be from r0-r7 when in Thumb2.
3689 else if (Opc == ARM::tADDhirr && isThumbOne() &&
3690 isARMLowRegister(Inst.getOperand(1).getReg()) &&
3691 isARMLowRegister(Inst.getOperand(2).getReg()))
3692 return Match_RequiresThumb2;
3693 // Others only require ARMv6 or later.
3694 else if (Opc == ARM::tMOVr && isThumbOne() && !hasV6Ops() &&
3695 isARMLowRegister(Inst.getOperand(0).getReg()) &&
3696 isARMLowRegister(Inst.getOperand(1).getReg()))
3697 return Match_RequiresV6;
3698 return Match_Success;
3702 MatchAndEmitInstruction(SMLoc IDLoc,
3703 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
3707 unsigned MatchResult;
3708 MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo);
3709 switch (MatchResult) {
3712 // Context sensitive operand constraints aren't handled by the matcher,
3713 // so check them here.
3714 if (validateInstruction(Inst, Operands)) {
3715 // Still progress the IT block, otherwise one wrong condition causes
3716 // nasty cascading errors.
3717 forwardITPosition();
3721 // Some instructions need post-processing to, for example, tweak which
3722 // encoding is selected.
3723 processInstruction(Inst, Operands);
3725 // Only move forward at the very end so that everything in validate
3726 // and process gets a consistent answer about whether we're in an IT
3728 forwardITPosition();
3730 Out.EmitInstruction(Inst);
3732 case Match_MissingFeature:
3733 Error(IDLoc, "instruction requires a CPU feature not currently enabled");
3735 case Match_InvalidOperand: {
3736 SMLoc ErrorLoc = IDLoc;
3737 if (ErrorInfo != ~0U) {
3738 if (ErrorInfo >= Operands.size())
3739 return Error(IDLoc, "too few operands for instruction");
3741 ErrorLoc = ((ARMOperand*)Operands[ErrorInfo])->getStartLoc();
3742 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
3745 return Error(ErrorLoc, "invalid operand for instruction");
3747 case Match_MnemonicFail:
3748 return Error(IDLoc, "invalid instruction");
3749 case Match_ConversionFail:
3750 // The converter function will have already emited a diagnostic.
3752 case Match_RequiresNotITBlock:
3753 return Error(IDLoc, "flag setting instruction only valid outside IT block");
3754 case Match_RequiresITBlock:
3755 return Error(IDLoc, "instruction only valid inside IT block");
3756 case Match_RequiresV6:
3757 return Error(IDLoc, "instruction variant requires ARMv6 or later");
3758 case Match_RequiresThumb2:
3759 return Error(IDLoc, "instruction variant requires Thumb2");
3762 llvm_unreachable("Implement any new match types added!");
3766 /// parseDirective parses the arm specific directives
3767 bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
3768 StringRef IDVal = DirectiveID.getIdentifier();
3769 if (IDVal == ".word")
3770 return parseDirectiveWord(4, DirectiveID.getLoc());
3771 else if (IDVal == ".thumb")
3772 return parseDirectiveThumb(DirectiveID.getLoc());
3773 else if (IDVal == ".thumb_func")
3774 return parseDirectiveThumbFunc(DirectiveID.getLoc());
3775 else if (IDVal == ".code")
3776 return parseDirectiveCode(DirectiveID.getLoc());
3777 else if (IDVal == ".syntax")
3778 return parseDirectiveSyntax(DirectiveID.getLoc());
3782 /// parseDirectiveWord
3783 /// ::= .word [ expression (, expression)* ]
3784 bool ARMAsmParser::parseDirectiveWord(unsigned Size, SMLoc L) {
3785 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3787 const MCExpr *Value;
3788 if (getParser().ParseExpression(Value))
3791 getParser().getStreamer().EmitValue(Value, Size, 0/*addrspace*/);
3793 if (getLexer().is(AsmToken::EndOfStatement))
3796 // FIXME: Improve diagnostic.
3797 if (getLexer().isNot(AsmToken::Comma))
3798 return Error(L, "unexpected token in directive");
3807 /// parseDirectiveThumb
3809 bool ARMAsmParser::parseDirectiveThumb(SMLoc L) {
3810 if (getLexer().isNot(AsmToken::EndOfStatement))
3811 return Error(L, "unexpected token in directive");
3814 // TODO: set thumb mode
3815 // TODO: tell the MC streamer the mode
3816 // getParser().getStreamer().Emit???();
3820 /// parseDirectiveThumbFunc
3821 /// ::= .thumbfunc symbol_name
3822 bool ARMAsmParser::parseDirectiveThumbFunc(SMLoc L) {
3823 const MCAsmInfo &MAI = getParser().getStreamer().getContext().getAsmInfo();
3824 bool isMachO = MAI.hasSubsectionsViaSymbols();
3827 // Darwin asm has function name after .thumb_func direction
3830 const AsmToken &Tok = Parser.getTok();
3831 if (Tok.isNot(AsmToken::Identifier) && Tok.isNot(AsmToken::String))
3832 return Error(L, "unexpected token in .thumb_func directive");
3833 Name = Tok.getString();
3834 Parser.Lex(); // Consume the identifier token.
3837 if (getLexer().isNot(AsmToken::EndOfStatement))
3838 return Error(L, "unexpected token in directive");
3841 // FIXME: assuming function name will be the line following .thumb_func
3843 Name = Parser.getTok().getString();
3846 // Mark symbol as a thumb symbol.
3847 MCSymbol *Func = getParser().getContext().GetOrCreateSymbol(Name);
3848 getParser().getStreamer().EmitThumbFunc(Func);
3852 /// parseDirectiveSyntax
3853 /// ::= .syntax unified | divided
3854 bool ARMAsmParser::parseDirectiveSyntax(SMLoc L) {
3855 const AsmToken &Tok = Parser.getTok();
3856 if (Tok.isNot(AsmToken::Identifier))
3857 return Error(L, "unexpected token in .syntax directive");
3858 StringRef Mode = Tok.getString();
3859 if (Mode == "unified" || Mode == "UNIFIED")
3861 else if (Mode == "divided" || Mode == "DIVIDED")
3862 return Error(L, "'.syntax divided' arm asssembly not supported");
3864 return Error(L, "unrecognized syntax mode in .syntax directive");
3866 if (getLexer().isNot(AsmToken::EndOfStatement))
3867 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
3870 // TODO tell the MC streamer the mode
3871 // getParser().getStreamer().Emit???();
3875 /// parseDirectiveCode
3876 /// ::= .code 16 | 32
3877 bool ARMAsmParser::parseDirectiveCode(SMLoc L) {
3878 const AsmToken &Tok = Parser.getTok();
3879 if (Tok.isNot(AsmToken::Integer))
3880 return Error(L, "unexpected token in .code directive");
3881 int64_t Val = Parser.getTok().getIntVal();
3887 return Error(L, "invalid operand to .code directive");
3889 if (getLexer().isNot(AsmToken::EndOfStatement))
3890 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
3896 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code16);
3900 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code32);
3906 extern "C" void LLVMInitializeARMAsmLexer();
3908 /// Force static initialization.
3909 extern "C" void LLVMInitializeARMAsmParser() {
3910 RegisterMCAsmParser<ARMAsmParser> X(TheARMTarget);
3911 RegisterMCAsmParser<ARMAsmParser> Y(TheThumbTarget);
3912 LLVMInitializeARMAsmLexer();
3915 #define GET_REGISTER_MATCHER
3916 #define GET_MATCHER_IMPLEMENTATION
3917 #include "ARMGenAsmMatcher.inc"