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 cvtT2LdrdPre(MCInst &Inst, unsigned Opcode,
162 const SmallVectorImpl<MCParsedAsmOperand*> &);
163 bool cvtT2StrdPre(MCInst &Inst, unsigned Opcode,
164 const SmallVectorImpl<MCParsedAsmOperand*> &);
165 bool cvtLdWriteBackRegT2AddrModeImm8(MCInst &Inst, unsigned Opcode,
166 const SmallVectorImpl<MCParsedAsmOperand*> &);
167 bool cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
168 const SmallVectorImpl<MCParsedAsmOperand*> &);
169 bool cvtLdWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
170 const SmallVectorImpl<MCParsedAsmOperand*> &);
171 bool cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
172 const SmallVectorImpl<MCParsedAsmOperand*> &);
173 bool cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
174 const SmallVectorImpl<MCParsedAsmOperand*> &);
175 bool cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
176 const SmallVectorImpl<MCParsedAsmOperand*> &);
177 bool cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
178 const SmallVectorImpl<MCParsedAsmOperand*> &);
179 bool cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
180 const SmallVectorImpl<MCParsedAsmOperand*> &);
181 bool cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
182 const SmallVectorImpl<MCParsedAsmOperand*> &);
183 bool cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
184 const SmallVectorImpl<MCParsedAsmOperand*> &);
185 bool cvtLdrdPre(MCInst &Inst, unsigned Opcode,
186 const SmallVectorImpl<MCParsedAsmOperand*> &);
187 bool cvtStrdPre(MCInst &Inst, unsigned Opcode,
188 const SmallVectorImpl<MCParsedAsmOperand*> &);
189 bool cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
190 const SmallVectorImpl<MCParsedAsmOperand*> &);
191 bool cvtThumbMultiply(MCInst &Inst, unsigned Opcode,
192 const SmallVectorImpl<MCParsedAsmOperand*> &);
194 bool validateInstruction(MCInst &Inst,
195 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
196 void processInstruction(MCInst &Inst,
197 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
198 bool shouldOmitCCOutOperand(StringRef Mnemonic,
199 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
202 enum ARMMatchResultTy {
203 Match_RequiresITBlock = FIRST_TARGET_MATCH_RESULT_TY,
204 Match_RequiresNotITBlock,
209 ARMAsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser)
210 : MCTargetAsmParser(), STI(_STI), Parser(_Parser) {
211 MCAsmParserExtension::Initialize(_Parser);
213 // Initialize the set of available features.
214 setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
216 // Not in an ITBlock to start with.
217 ITState.CurPosition = ~0U;
220 // Implementation of the MCTargetAsmParser interface:
221 bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc);
222 bool ParseInstruction(StringRef Name, SMLoc NameLoc,
223 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
224 bool ParseDirective(AsmToken DirectiveID);
226 unsigned checkTargetMatchPredicate(MCInst &Inst);
228 bool MatchAndEmitInstruction(SMLoc IDLoc,
229 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
232 } // end anonymous namespace
236 /// ARMOperand - Instances of this class represent a parsed ARM machine
238 class ARMOperand : public MCParsedAsmOperand {
263 SMLoc StartLoc, EndLoc;
264 SmallVector<unsigned, 8> Registers;
268 ARMCC::CondCodes Val;
284 ARM_PROC::IFlags Val;
304 /// Combined record for all forms of ARM address expressions.
307 // Offset is in OffsetReg or OffsetImm. If both are zero, no offset
309 const MCConstantExpr *OffsetImm; // Offset immediate value
310 unsigned OffsetRegNum; // Offset register num, when OffsetImm == NULL
311 ARM_AM::ShiftOpc ShiftType; // Shift type for OffsetReg
312 unsigned ShiftImm; // shift for OffsetReg.
313 unsigned isNegative : 1; // Negated OffsetReg? (~'U' bit)
319 ARM_AM::ShiftOpc ShiftTy;
328 ARM_AM::ShiftOpc ShiftTy;
334 ARM_AM::ShiftOpc ShiftTy;
347 ARMOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {}
349 ARMOperand(const ARMOperand &o) : MCParsedAsmOperand() {
351 StartLoc = o.StartLoc;
368 case DPRRegisterList:
369 case SPRRegisterList:
370 Registers = o.Registers;
385 case PostIndexRegister:
386 PostIdxReg = o.PostIdxReg;
394 case ShifterImmediate:
395 ShifterImm = o.ShifterImm;
397 case ShiftedRegister:
398 RegShiftedReg = o.RegShiftedReg;
400 case ShiftedImmediate:
401 RegShiftedImm = o.RegShiftedImm;
403 case RotateImmediate:
406 case BitfieldDescriptor:
407 Bitfield = o.Bitfield;
412 /// getStartLoc - Get the location of the first token of this operand.
413 SMLoc getStartLoc() const { return StartLoc; }
414 /// getEndLoc - Get the location of the last token of this operand.
415 SMLoc getEndLoc() const { return EndLoc; }
417 ARMCC::CondCodes getCondCode() const {
418 assert(Kind == CondCode && "Invalid access!");
422 unsigned getCoproc() const {
423 assert((Kind == CoprocNum || Kind == CoprocReg) && "Invalid access!");
427 StringRef getToken() const {
428 assert(Kind == Token && "Invalid access!");
429 return StringRef(Tok.Data, Tok.Length);
432 unsigned getReg() const {
433 assert((Kind == Register || Kind == CCOut) && "Invalid access!");
437 const SmallVectorImpl<unsigned> &getRegList() const {
438 assert((Kind == RegisterList || Kind == DPRRegisterList ||
439 Kind == SPRRegisterList) && "Invalid access!");
443 const MCExpr *getImm() const {
444 assert(Kind == Immediate && "Invalid access!");
448 ARM_MB::MemBOpt getMemBarrierOpt() const {
449 assert(Kind == MemBarrierOpt && "Invalid access!");
453 ARM_PROC::IFlags getProcIFlags() const {
454 assert(Kind == ProcIFlags && "Invalid access!");
458 unsigned getMSRMask() const {
459 assert(Kind == MSRMask && "Invalid access!");
463 bool isCoprocNum() const { return Kind == CoprocNum; }
464 bool isCoprocReg() const { return Kind == CoprocReg; }
465 bool isCondCode() const { return Kind == CondCode; }
466 bool isCCOut() const { return Kind == CCOut; }
467 bool isITMask() const { return Kind == ITCondMask; }
468 bool isITCondCode() const { return Kind == CondCode; }
469 bool isImm() const { return Kind == Immediate; }
470 bool isImm8s4() const {
471 if (Kind != Immediate)
473 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
474 if (!CE) return false;
475 int64_t Value = CE->getValue();
476 return ((Value & 3) == 0) && Value >= -1020 && Value <= 1020;
478 bool isImm0_1020s4() const {
479 if (Kind != Immediate)
481 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
482 if (!CE) return false;
483 int64_t Value = CE->getValue();
484 return ((Value & 3) == 0) && Value >= 0 && Value <= 1020;
486 bool isImm0_508s4() const {
487 if (Kind != Immediate)
489 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
490 if (!CE) return false;
491 int64_t Value = CE->getValue();
492 return ((Value & 3) == 0) && Value >= 0 && Value <= 508;
494 bool isImm0_255() const {
495 if (Kind != Immediate)
497 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
498 if (!CE) return false;
499 int64_t Value = CE->getValue();
500 return Value >= 0 && Value < 256;
502 bool isImm0_7() const {
503 if (Kind != Immediate)
505 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
506 if (!CE) return false;
507 int64_t Value = CE->getValue();
508 return Value >= 0 && Value < 8;
510 bool isImm0_15() const {
511 if (Kind != Immediate)
513 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
514 if (!CE) return false;
515 int64_t Value = CE->getValue();
516 return Value >= 0 && Value < 16;
518 bool isImm0_31() const {
519 if (Kind != Immediate)
521 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
522 if (!CE) return false;
523 int64_t Value = CE->getValue();
524 return Value >= 0 && Value < 32;
526 bool isImm1_16() const {
527 if (Kind != Immediate)
529 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
530 if (!CE) return false;
531 int64_t Value = CE->getValue();
532 return Value > 0 && Value < 17;
534 bool isImm1_32() const {
535 if (Kind != Immediate)
537 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
538 if (!CE) return false;
539 int64_t Value = CE->getValue();
540 return Value > 0 && Value < 33;
542 bool isImm0_65535() const {
543 if (Kind != Immediate)
545 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
546 if (!CE) return false;
547 int64_t Value = CE->getValue();
548 return Value >= 0 && Value < 65536;
550 bool isImm0_65535Expr() const {
551 if (Kind != Immediate)
553 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
554 // If it's not a constant expression, it'll generate a fixup and be
556 if (!CE) return true;
557 int64_t Value = CE->getValue();
558 return Value >= 0 && Value < 65536;
560 bool isImm24bit() const {
561 if (Kind != Immediate)
563 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
564 if (!CE) return false;
565 int64_t Value = CE->getValue();
566 return Value >= 0 && Value <= 0xffffff;
568 bool isImmThumbSR() const {
569 if (Kind != Immediate)
571 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
572 if (!CE) return false;
573 int64_t Value = CE->getValue();
574 return Value > 0 && Value < 33;
576 bool isPKHLSLImm() const {
577 if (Kind != Immediate)
579 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
580 if (!CE) return false;
581 int64_t Value = CE->getValue();
582 return Value >= 0 && Value < 32;
584 bool isPKHASRImm() const {
585 if (Kind != Immediate)
587 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
588 if (!CE) return false;
589 int64_t Value = CE->getValue();
590 return Value > 0 && Value <= 32;
592 bool isARMSOImm() const {
593 if (Kind != Immediate)
595 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
596 if (!CE) return false;
597 int64_t Value = CE->getValue();
598 return ARM_AM::getSOImmVal(Value) != -1;
600 bool isT2SOImm() const {
601 if (Kind != Immediate)
603 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
604 if (!CE) return false;
605 int64_t Value = CE->getValue();
606 return ARM_AM::getT2SOImmVal(Value) != -1;
608 bool isSetEndImm() const {
609 if (Kind != Immediate)
611 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
612 if (!CE) return false;
613 int64_t Value = CE->getValue();
614 return Value == 1 || Value == 0;
616 bool isReg() const { return Kind == Register; }
617 bool isRegList() const { return Kind == RegisterList; }
618 bool isDPRRegList() const { return Kind == DPRRegisterList; }
619 bool isSPRRegList() const { return Kind == SPRRegisterList; }
620 bool isToken() const { return Kind == Token; }
621 bool isMemBarrierOpt() const { return Kind == MemBarrierOpt; }
622 bool isMemory() const { return Kind == Memory; }
623 bool isShifterImm() const { return Kind == ShifterImmediate; }
624 bool isRegShiftedReg() const { return Kind == ShiftedRegister; }
625 bool isRegShiftedImm() const { return Kind == ShiftedImmediate; }
626 bool isRotImm() const { return Kind == RotateImmediate; }
627 bool isBitfield() const { return Kind == BitfieldDescriptor; }
628 bool isPostIdxRegShifted() const { return Kind == PostIndexRegister; }
629 bool isPostIdxReg() const {
630 return Kind == PostIndexRegister && PostIdxReg.ShiftTy == ARM_AM::no_shift;
632 bool isMemNoOffset() const {
635 // No offset of any kind.
636 return Mem.OffsetRegNum == 0 && Mem.OffsetImm == 0;
638 bool isAddrMode2() const {
641 // Check for register offset.
642 if (Mem.OffsetRegNum) return true;
643 // Immediate offset in range [-4095, 4095].
644 if (!Mem.OffsetImm) return true;
645 int64_t Val = Mem.OffsetImm->getValue();
646 return Val > -4096 && Val < 4096;
648 bool isAM2OffsetImm() const {
649 if (Kind != Immediate)
651 // Immediate offset in range [-4095, 4095].
652 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
653 if (!CE) return false;
654 int64_t Val = CE->getValue();
655 return Val > -4096 && Val < 4096;
657 bool isAddrMode3() const {
660 // No shifts are legal for AM3.
661 if (Mem.ShiftType != ARM_AM::no_shift) return false;
662 // Check for register offset.
663 if (Mem.OffsetRegNum) return true;
664 // Immediate offset in range [-255, 255].
665 if (!Mem.OffsetImm) return true;
666 int64_t Val = Mem.OffsetImm->getValue();
667 return Val > -256 && Val < 256;
669 bool isAM3Offset() const {
670 if (Kind != Immediate && Kind != PostIndexRegister)
672 if (Kind == PostIndexRegister)
673 return PostIdxReg.ShiftTy == ARM_AM::no_shift;
674 // Immediate offset in range [-255, 255].
675 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
676 if (!CE) return false;
677 int64_t Val = CE->getValue();
678 // Special case, #-0 is INT32_MIN.
679 return (Val > -256 && Val < 256) || Val == INT32_MIN;
681 bool isAddrMode5() const {
684 // Check for register offset.
685 if (Mem.OffsetRegNum) return false;
686 // Immediate offset in range [-1020, 1020] and a multiple of 4.
687 if (!Mem.OffsetImm) return true;
688 int64_t Val = Mem.OffsetImm->getValue();
689 return (Val >= -1020 && Val <= 1020 && ((Val & 3) == 0)) ||
692 bool isMemRegOffset() const {
693 if (Kind != Memory || !Mem.OffsetRegNum)
697 bool isT2MemRegOffset() const {
698 if (Kind != Memory || !Mem.OffsetRegNum || Mem.isNegative)
700 // Only lsl #{0, 1, 2, 3} allowed.
701 if (Mem.ShiftType == ARM_AM::no_shift)
703 if (Mem.ShiftType != ARM_AM::lsl || Mem.ShiftImm > 3)
707 bool isMemThumbRR() const {
708 // Thumb reg+reg addressing is simple. Just two registers, a base and
709 // an offset. No shifts, negations or any other complicating factors.
710 if (Kind != Memory || !Mem.OffsetRegNum || Mem.isNegative ||
711 Mem.ShiftType != ARM_AM::no_shift)
713 return isARMLowRegister(Mem.BaseRegNum) &&
714 (!Mem.OffsetRegNum || isARMLowRegister(Mem.OffsetRegNum));
716 bool isMemThumbRIs4() const {
717 if (Kind != Memory || Mem.OffsetRegNum != 0 ||
718 !isARMLowRegister(Mem.BaseRegNum))
720 // Immediate offset, multiple of 4 in range [0, 124].
721 if (!Mem.OffsetImm) return true;
722 int64_t Val = Mem.OffsetImm->getValue();
723 return Val >= 0 && Val <= 124 && (Val % 4) == 0;
725 bool isMemThumbRIs2() const {
726 if (Kind != Memory || Mem.OffsetRegNum != 0 ||
727 !isARMLowRegister(Mem.BaseRegNum))
729 // Immediate offset, multiple of 4 in range [0, 62].
730 if (!Mem.OffsetImm) return true;
731 int64_t Val = Mem.OffsetImm->getValue();
732 return Val >= 0 && Val <= 62 && (Val % 2) == 0;
734 bool isMemThumbRIs1() const {
735 if (Kind != Memory || Mem.OffsetRegNum != 0 ||
736 !isARMLowRegister(Mem.BaseRegNum))
738 // Immediate offset in range [0, 31].
739 if (!Mem.OffsetImm) return true;
740 int64_t Val = Mem.OffsetImm->getValue();
741 return Val >= 0 && Val <= 31;
743 bool isMemThumbSPI() const {
744 if (Kind != Memory || Mem.OffsetRegNum != 0 || Mem.BaseRegNum != ARM::SP)
746 // Immediate offset, multiple of 4 in range [0, 1020].
747 if (!Mem.OffsetImm) return true;
748 int64_t Val = Mem.OffsetImm->getValue();
749 return Val >= 0 && Val <= 1020 && (Val % 4) == 0;
751 bool isMemImm8s4Offset() const {
752 if (Kind != Memory || Mem.OffsetRegNum != 0)
754 // Immediate offset a multiple of 4 in range [-1020, 1020].
755 if (!Mem.OffsetImm) return true;
756 int64_t Val = Mem.OffsetImm->getValue();
757 return Val >= -1020 && Val <= 1020 && (Val & 3) == 0;
759 bool isMemImm8Offset() const {
760 if (Kind != Memory || Mem.OffsetRegNum != 0)
762 // Immediate offset in range [-255, 255].
763 if (!Mem.OffsetImm) return true;
764 int64_t Val = Mem.OffsetImm->getValue();
765 return Val > -256 && Val < 256;
767 bool isMemPosImm8Offset() const {
768 if (Kind != Memory || Mem.OffsetRegNum != 0)
770 // Immediate offset in range [0, 255].
771 if (!Mem.OffsetImm) return true;
772 int64_t Val = Mem.OffsetImm->getValue();
773 return Val >= 0 && Val < 256;
775 bool isMemNegImm8Offset() const {
776 if (Kind != Memory || Mem.OffsetRegNum != 0)
778 // Immediate offset in range [-255, -1].
779 if (!Mem.OffsetImm) return true;
780 int64_t Val = Mem.OffsetImm->getValue();
781 return Val > -256 && Val < 0;
783 bool isMemUImm12Offset() const {
784 // If we have an immediate that's not a constant, treat it as a label
785 // reference needing a fixup. If it is a constant, it's something else
787 if (Kind == Immediate && !isa<MCConstantExpr>(getImm()))
790 if (Kind != Memory || Mem.OffsetRegNum != 0)
792 // Immediate offset in range [0, 4095].
793 if (!Mem.OffsetImm) return true;
794 int64_t Val = Mem.OffsetImm->getValue();
795 return (Val >= 0 && Val < 4096);
797 bool isMemImm12Offset() const {
798 // If we have an immediate that's not a constant, treat it as a label
799 // reference needing a fixup. If it is a constant, it's something else
801 if (Kind == Immediate && !isa<MCConstantExpr>(getImm()))
804 if (Kind != Memory || Mem.OffsetRegNum != 0)
806 // Immediate offset in range [-4095, 4095].
807 if (!Mem.OffsetImm) return true;
808 int64_t Val = Mem.OffsetImm->getValue();
809 return (Val > -4096 && Val < 4096) || (Val == INT32_MIN);
811 bool isPostIdxImm8() const {
812 if (Kind != Immediate)
814 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
815 if (!CE) return false;
816 int64_t Val = CE->getValue();
817 return (Val > -256 && Val < 256) || (Val == INT32_MIN);
820 bool isMSRMask() const { return Kind == MSRMask; }
821 bool isProcIFlags() const { return Kind == ProcIFlags; }
823 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
824 // Add as immediates when possible. Null MCExpr = 0.
826 Inst.addOperand(MCOperand::CreateImm(0));
827 else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
828 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
830 Inst.addOperand(MCOperand::CreateExpr(Expr));
833 void addCondCodeOperands(MCInst &Inst, unsigned N) const {
834 assert(N == 2 && "Invalid number of operands!");
835 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
836 unsigned RegNum = getCondCode() == ARMCC::AL ? 0: ARM::CPSR;
837 Inst.addOperand(MCOperand::CreateReg(RegNum));
840 void addCoprocNumOperands(MCInst &Inst, unsigned N) const {
841 assert(N == 1 && "Invalid number of operands!");
842 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
845 void addITMaskOperands(MCInst &Inst, unsigned N) const {
846 assert(N == 1 && "Invalid number of operands!");
847 Inst.addOperand(MCOperand::CreateImm(ITMask.Mask));
850 void addITCondCodeOperands(MCInst &Inst, unsigned N) const {
851 assert(N == 1 && "Invalid number of operands!");
852 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
855 void addCoprocRegOperands(MCInst &Inst, unsigned N) const {
856 assert(N == 1 && "Invalid number of operands!");
857 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
860 void addCCOutOperands(MCInst &Inst, unsigned N) const {
861 assert(N == 1 && "Invalid number of operands!");
862 Inst.addOperand(MCOperand::CreateReg(getReg()));
865 void addRegOperands(MCInst &Inst, unsigned N) const {
866 assert(N == 1 && "Invalid number of operands!");
867 Inst.addOperand(MCOperand::CreateReg(getReg()));
870 void addRegShiftedRegOperands(MCInst &Inst, unsigned N) const {
871 assert(N == 3 && "Invalid number of operands!");
872 assert(isRegShiftedReg() && "addRegShiftedRegOperands() on non RegShiftedReg!");
873 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.SrcReg));
874 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.ShiftReg));
875 Inst.addOperand(MCOperand::CreateImm(
876 ARM_AM::getSORegOpc(RegShiftedReg.ShiftTy, RegShiftedReg.ShiftImm)));
879 void addRegShiftedImmOperands(MCInst &Inst, unsigned N) const {
880 assert(N == 2 && "Invalid number of operands!");
881 assert(isRegShiftedImm() && "addRegShiftedImmOperands() on non RegShiftedImm!");
882 Inst.addOperand(MCOperand::CreateReg(RegShiftedImm.SrcReg));
883 Inst.addOperand(MCOperand::CreateImm(
884 ARM_AM::getSORegOpc(RegShiftedImm.ShiftTy, RegShiftedImm.ShiftImm)));
887 void addShifterImmOperands(MCInst &Inst, unsigned N) const {
888 assert(N == 1 && "Invalid number of operands!");
889 Inst.addOperand(MCOperand::CreateImm((ShifterImm.isASR << 5) |
893 void addRegListOperands(MCInst &Inst, unsigned N) const {
894 assert(N == 1 && "Invalid number of operands!");
895 const SmallVectorImpl<unsigned> &RegList = getRegList();
896 for (SmallVectorImpl<unsigned>::const_iterator
897 I = RegList.begin(), E = RegList.end(); I != E; ++I)
898 Inst.addOperand(MCOperand::CreateReg(*I));
901 void addDPRRegListOperands(MCInst &Inst, unsigned N) const {
902 addRegListOperands(Inst, N);
905 void addSPRRegListOperands(MCInst &Inst, unsigned N) const {
906 addRegListOperands(Inst, N);
909 void addRotImmOperands(MCInst &Inst, unsigned N) const {
910 assert(N == 1 && "Invalid number of operands!");
911 // Encoded as val>>3. The printer handles display as 8, 16, 24.
912 Inst.addOperand(MCOperand::CreateImm(RotImm.Imm >> 3));
915 void addBitfieldOperands(MCInst &Inst, unsigned N) const {
916 assert(N == 1 && "Invalid number of operands!");
917 // Munge the lsb/width into a bitfield mask.
918 unsigned lsb = Bitfield.LSB;
919 unsigned width = Bitfield.Width;
920 // Make a 32-bit mask w/ the referenced bits clear and all other bits set.
921 uint32_t Mask = ~(((uint32_t)0xffffffff >> lsb) << (32 - width) >>
922 (32 - (lsb + width)));
923 Inst.addOperand(MCOperand::CreateImm(Mask));
926 void addImmOperands(MCInst &Inst, unsigned N) const {
927 assert(N == 1 && "Invalid number of operands!");
928 addExpr(Inst, getImm());
931 void addImm8s4Operands(MCInst &Inst, unsigned N) const {
932 assert(N == 1 && "Invalid number of operands!");
933 // FIXME: We really want to scale the value here, but the LDRD/STRD
934 // instruction don't encode operands that way yet.
935 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
936 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
939 void addImm0_1020s4Operands(MCInst &Inst, unsigned N) const {
940 assert(N == 1 && "Invalid number of operands!");
941 // The immediate is scaled by four in the encoding and is stored
942 // in the MCInst as such. Lop off the low two bits here.
943 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
944 Inst.addOperand(MCOperand::CreateImm(CE->getValue() / 4));
947 void addImm0_508s4Operands(MCInst &Inst, unsigned N) const {
948 assert(N == 1 && "Invalid number of operands!");
949 // The immediate is scaled by four in the encoding and is stored
950 // in the MCInst as such. Lop off the low two bits here.
951 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
952 Inst.addOperand(MCOperand::CreateImm(CE->getValue() / 4));
955 void addImm0_255Operands(MCInst &Inst, unsigned N) const {
956 assert(N == 1 && "Invalid number of operands!");
957 addExpr(Inst, getImm());
960 void addImm0_7Operands(MCInst &Inst, unsigned N) const {
961 assert(N == 1 && "Invalid number of operands!");
962 addExpr(Inst, getImm());
965 void addImm0_15Operands(MCInst &Inst, unsigned N) const {
966 assert(N == 1 && "Invalid number of operands!");
967 addExpr(Inst, getImm());
970 void addImm0_31Operands(MCInst &Inst, unsigned N) const {
971 assert(N == 1 && "Invalid number of operands!");
972 addExpr(Inst, getImm());
975 void addImm1_16Operands(MCInst &Inst, unsigned N) const {
976 assert(N == 1 && "Invalid number of operands!");
977 // The constant encodes as the immediate-1, and we store in the instruction
978 // the bits as encoded, so subtract off one here.
979 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
980 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
983 void addImm1_32Operands(MCInst &Inst, unsigned N) const {
984 assert(N == 1 && "Invalid number of operands!");
985 // The constant encodes as the immediate-1, and we store in the instruction
986 // the bits as encoded, so subtract off one here.
987 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
988 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
991 void addImm0_65535Operands(MCInst &Inst, unsigned N) const {
992 assert(N == 1 && "Invalid number of operands!");
993 addExpr(Inst, getImm());
996 void addImm0_65535ExprOperands(MCInst &Inst, unsigned N) const {
997 assert(N == 1 && "Invalid number of operands!");
998 addExpr(Inst, getImm());
1001 void addImm24bitOperands(MCInst &Inst, unsigned N) const {
1002 assert(N == 1 && "Invalid number of operands!");
1003 addExpr(Inst, getImm());
1006 void addImmThumbSROperands(MCInst &Inst, unsigned N) const {
1007 assert(N == 1 && "Invalid number of operands!");
1008 // The constant encodes as the immediate, except for 32, which encodes as
1010 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1011 unsigned Imm = CE->getValue();
1012 Inst.addOperand(MCOperand::CreateImm((Imm == 32 ? 0 : Imm)));
1015 void addPKHLSLImmOperands(MCInst &Inst, unsigned N) const {
1016 assert(N == 1 && "Invalid number of operands!");
1017 addExpr(Inst, getImm());
1020 void addPKHASRImmOperands(MCInst &Inst, unsigned N) const {
1021 assert(N == 1 && "Invalid number of operands!");
1022 // An ASR value of 32 encodes as 0, so that's how we want to add it to
1023 // the instruction as well.
1024 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1025 int Val = CE->getValue();
1026 Inst.addOperand(MCOperand::CreateImm(Val == 32 ? 0 : Val));
1029 void addARMSOImmOperands(MCInst &Inst, unsigned N) const {
1030 assert(N == 1 && "Invalid number of operands!");
1031 addExpr(Inst, getImm());
1034 void addT2SOImmOperands(MCInst &Inst, unsigned N) const {
1035 assert(N == 1 && "Invalid number of operands!");
1036 addExpr(Inst, getImm());
1039 void addSetEndImmOperands(MCInst &Inst, unsigned N) const {
1040 assert(N == 1 && "Invalid number of operands!");
1041 addExpr(Inst, getImm());
1044 void addMemBarrierOptOperands(MCInst &Inst, unsigned N) const {
1045 assert(N == 1 && "Invalid number of operands!");
1046 Inst.addOperand(MCOperand::CreateImm(unsigned(getMemBarrierOpt())));
1049 void addMemNoOffsetOperands(MCInst &Inst, unsigned N) const {
1050 assert(N == 1 && "Invalid number of operands!");
1051 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1054 void addAddrMode2Operands(MCInst &Inst, unsigned N) const {
1055 assert(N == 3 && "Invalid number of operands!");
1056 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
1057 if (!Mem.OffsetRegNum) {
1058 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1059 // Special case for #-0
1060 if (Val == INT32_MIN) Val = 0;
1061 if (Val < 0) Val = -Val;
1062 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
1064 // For register offset, we encode the shift type and negation flag
1066 Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
1067 Mem.ShiftImm, Mem.ShiftType);
1069 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1070 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
1071 Inst.addOperand(MCOperand::CreateImm(Val));
1074 void addAM2OffsetImmOperands(MCInst &Inst, unsigned N) const {
1075 assert(N == 2 && "Invalid number of operands!");
1076 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1077 assert(CE && "non-constant AM2OffsetImm operand!");
1078 int32_t Val = CE->getValue();
1079 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1080 // Special case for #-0
1081 if (Val == INT32_MIN) Val = 0;
1082 if (Val < 0) Val = -Val;
1083 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
1084 Inst.addOperand(MCOperand::CreateReg(0));
1085 Inst.addOperand(MCOperand::CreateImm(Val));
1088 void addAddrMode3Operands(MCInst &Inst, unsigned N) const {
1089 assert(N == 3 && "Invalid number of operands!");
1090 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
1091 if (!Mem.OffsetRegNum) {
1092 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1093 // Special case for #-0
1094 if (Val == INT32_MIN) Val = 0;
1095 if (Val < 0) Val = -Val;
1096 Val = ARM_AM::getAM3Opc(AddSub, Val);
1098 // For register offset, we encode the shift type and negation flag
1100 Val = ARM_AM::getAM3Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add, 0);
1102 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1103 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
1104 Inst.addOperand(MCOperand::CreateImm(Val));
1107 void addAM3OffsetOperands(MCInst &Inst, unsigned N) const {
1108 assert(N == 2 && "Invalid number of operands!");
1109 if (Kind == PostIndexRegister) {
1111 ARM_AM::getAM3Opc(PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub, 0);
1112 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1113 Inst.addOperand(MCOperand::CreateImm(Val));
1118 const MCConstantExpr *CE = static_cast<const MCConstantExpr*>(getImm());
1119 int32_t Val = CE->getValue();
1120 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1121 // Special case for #-0
1122 if (Val == INT32_MIN) Val = 0;
1123 if (Val < 0) Val = -Val;
1124 Val = ARM_AM::getAM3Opc(AddSub, Val);
1125 Inst.addOperand(MCOperand::CreateReg(0));
1126 Inst.addOperand(MCOperand::CreateImm(Val));
1129 void addAddrMode5Operands(MCInst &Inst, unsigned N) const {
1130 assert(N == 2 && "Invalid number of operands!");
1131 // The lower two bits are always zero and as such are not encoded.
1132 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() / 4 : 0;
1133 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1134 // Special case for #-0
1135 if (Val == INT32_MIN) Val = 0;
1136 if (Val < 0) Val = -Val;
1137 Val = ARM_AM::getAM5Opc(AddSub, Val);
1138 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1139 Inst.addOperand(MCOperand::CreateImm(Val));
1142 void addMemImm8s4OffsetOperands(MCInst &Inst, unsigned N) const {
1143 assert(N == 2 && "Invalid number of operands!");
1144 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
1145 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1146 Inst.addOperand(MCOperand::CreateImm(Val));
1149 void addMemImm8OffsetOperands(MCInst &Inst, unsigned N) const {
1150 assert(N == 2 && "Invalid number of operands!");
1151 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
1152 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1153 Inst.addOperand(MCOperand::CreateImm(Val));
1156 void addMemPosImm8OffsetOperands(MCInst &Inst, unsigned N) const {
1157 addMemImm8OffsetOperands(Inst, N);
1160 void addMemNegImm8OffsetOperands(MCInst &Inst, unsigned N) const {
1161 addMemImm8OffsetOperands(Inst, N);
1164 void addMemUImm12OffsetOperands(MCInst &Inst, unsigned N) const {
1165 assert(N == 2 && "Invalid number of operands!");
1166 // If this is an immediate, it's a label reference.
1167 if (Kind == Immediate) {
1168 addExpr(Inst, getImm());
1169 Inst.addOperand(MCOperand::CreateImm(0));
1173 // Otherwise, it's a normal memory reg+offset.
1174 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
1175 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1176 Inst.addOperand(MCOperand::CreateImm(Val));
1179 void addMemImm12OffsetOperands(MCInst &Inst, unsigned N) const {
1180 assert(N == 2 && "Invalid number of operands!");
1181 // If this is an immediate, it's a label reference.
1182 if (Kind == Immediate) {
1183 addExpr(Inst, getImm());
1184 Inst.addOperand(MCOperand::CreateImm(0));
1188 // Otherwise, it's a normal memory reg+offset.
1189 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
1190 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1191 Inst.addOperand(MCOperand::CreateImm(Val));
1194 void addMemRegOffsetOperands(MCInst &Inst, unsigned N) const {
1195 assert(N == 3 && "Invalid number of operands!");
1196 unsigned Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
1197 Mem.ShiftImm, Mem.ShiftType);
1198 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1199 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
1200 Inst.addOperand(MCOperand::CreateImm(Val));
1203 void addT2MemRegOffsetOperands(MCInst &Inst, unsigned N) const {
1204 assert(N == 3 && "Invalid number of operands!");
1205 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1206 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
1207 Inst.addOperand(MCOperand::CreateImm(Mem.ShiftImm));
1210 void addMemThumbRROperands(MCInst &Inst, unsigned N) const {
1211 assert(N == 2 && "Invalid number of operands!");
1212 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1213 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
1216 void addMemThumbRIs4Operands(MCInst &Inst, unsigned N) const {
1217 assert(N == 2 && "Invalid number of operands!");
1218 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 4) : 0;
1219 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1220 Inst.addOperand(MCOperand::CreateImm(Val));
1223 void addMemThumbRIs2Operands(MCInst &Inst, unsigned N) const {
1224 assert(N == 2 && "Invalid number of operands!");
1225 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 2) : 0;
1226 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1227 Inst.addOperand(MCOperand::CreateImm(Val));
1230 void addMemThumbRIs1Operands(MCInst &Inst, unsigned N) const {
1231 assert(N == 2 && "Invalid number of operands!");
1232 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue()) : 0;
1233 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1234 Inst.addOperand(MCOperand::CreateImm(Val));
1237 void addMemThumbSPIOperands(MCInst &Inst, unsigned N) const {
1238 assert(N == 2 && "Invalid number of operands!");
1239 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 4) : 0;
1240 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1241 Inst.addOperand(MCOperand::CreateImm(Val));
1244 void addPostIdxImm8Operands(MCInst &Inst, unsigned N) const {
1245 assert(N == 1 && "Invalid number of operands!");
1246 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1247 assert(CE && "non-constant post-idx-imm8 operand!");
1248 int Imm = CE->getValue();
1249 bool isAdd = Imm >= 0;
1250 if (Imm == INT32_MIN) Imm = 0;
1251 Imm = (Imm < 0 ? -Imm : Imm) | (int)isAdd << 8;
1252 Inst.addOperand(MCOperand::CreateImm(Imm));
1255 void addPostIdxRegOperands(MCInst &Inst, unsigned N) const {
1256 assert(N == 2 && "Invalid number of operands!");
1257 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1258 Inst.addOperand(MCOperand::CreateImm(PostIdxReg.isAdd));
1261 void addPostIdxRegShiftedOperands(MCInst &Inst, unsigned N) const {
1262 assert(N == 2 && "Invalid number of operands!");
1263 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1264 // The sign, shift type, and shift amount are encoded in a single operand
1265 // using the AM2 encoding helpers.
1266 ARM_AM::AddrOpc opc = PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub;
1267 unsigned Imm = ARM_AM::getAM2Opc(opc, PostIdxReg.ShiftImm,
1268 PostIdxReg.ShiftTy);
1269 Inst.addOperand(MCOperand::CreateImm(Imm));
1272 void addMSRMaskOperands(MCInst &Inst, unsigned N) const {
1273 assert(N == 1 && "Invalid number of operands!");
1274 Inst.addOperand(MCOperand::CreateImm(unsigned(getMSRMask())));
1277 void addProcIFlagsOperands(MCInst &Inst, unsigned N) const {
1278 assert(N == 1 && "Invalid number of operands!");
1279 Inst.addOperand(MCOperand::CreateImm(unsigned(getProcIFlags())));
1282 virtual void print(raw_ostream &OS) const;
1284 static ARMOperand *CreateITMask(unsigned Mask, SMLoc S) {
1285 ARMOperand *Op = new ARMOperand(ITCondMask);
1286 Op->ITMask.Mask = Mask;
1292 static ARMOperand *CreateCondCode(ARMCC::CondCodes CC, SMLoc S) {
1293 ARMOperand *Op = new ARMOperand(CondCode);
1300 static ARMOperand *CreateCoprocNum(unsigned CopVal, SMLoc S) {
1301 ARMOperand *Op = new ARMOperand(CoprocNum);
1302 Op->Cop.Val = CopVal;
1308 static ARMOperand *CreateCoprocReg(unsigned CopVal, SMLoc S) {
1309 ARMOperand *Op = new ARMOperand(CoprocReg);
1310 Op->Cop.Val = CopVal;
1316 static ARMOperand *CreateCCOut(unsigned RegNum, SMLoc S) {
1317 ARMOperand *Op = new ARMOperand(CCOut);
1318 Op->Reg.RegNum = RegNum;
1324 static ARMOperand *CreateToken(StringRef Str, SMLoc S) {
1325 ARMOperand *Op = new ARMOperand(Token);
1326 Op->Tok.Data = Str.data();
1327 Op->Tok.Length = Str.size();
1333 static ARMOperand *CreateReg(unsigned RegNum, SMLoc S, SMLoc E) {
1334 ARMOperand *Op = new ARMOperand(Register);
1335 Op->Reg.RegNum = RegNum;
1341 static ARMOperand *CreateShiftedRegister(ARM_AM::ShiftOpc ShTy,
1346 ARMOperand *Op = new ARMOperand(ShiftedRegister);
1347 Op->RegShiftedReg.ShiftTy = ShTy;
1348 Op->RegShiftedReg.SrcReg = SrcReg;
1349 Op->RegShiftedReg.ShiftReg = ShiftReg;
1350 Op->RegShiftedReg.ShiftImm = ShiftImm;
1356 static ARMOperand *CreateShiftedImmediate(ARM_AM::ShiftOpc ShTy,
1360 ARMOperand *Op = new ARMOperand(ShiftedImmediate);
1361 Op->RegShiftedImm.ShiftTy = ShTy;
1362 Op->RegShiftedImm.SrcReg = SrcReg;
1363 Op->RegShiftedImm.ShiftImm = ShiftImm;
1369 static ARMOperand *CreateShifterImm(bool isASR, unsigned Imm,
1371 ARMOperand *Op = new ARMOperand(ShifterImmediate);
1372 Op->ShifterImm.isASR = isASR;
1373 Op->ShifterImm.Imm = Imm;
1379 static ARMOperand *CreateRotImm(unsigned Imm, SMLoc S, SMLoc E) {
1380 ARMOperand *Op = new ARMOperand(RotateImmediate);
1381 Op->RotImm.Imm = Imm;
1387 static ARMOperand *CreateBitfield(unsigned LSB, unsigned Width,
1389 ARMOperand *Op = new ARMOperand(BitfieldDescriptor);
1390 Op->Bitfield.LSB = LSB;
1391 Op->Bitfield.Width = Width;
1398 CreateRegList(const SmallVectorImpl<std::pair<unsigned, SMLoc> > &Regs,
1399 SMLoc StartLoc, SMLoc EndLoc) {
1400 KindTy Kind = RegisterList;
1402 if (llvm::ARMMCRegisterClasses[ARM::DPRRegClassID].
1403 contains(Regs.front().first))
1404 Kind = DPRRegisterList;
1405 else if (llvm::ARMMCRegisterClasses[ARM::SPRRegClassID].
1406 contains(Regs.front().first))
1407 Kind = SPRRegisterList;
1409 ARMOperand *Op = new ARMOperand(Kind);
1410 for (SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1411 I = Regs.begin(), E = Regs.end(); I != E; ++I)
1412 Op->Registers.push_back(I->first);
1413 array_pod_sort(Op->Registers.begin(), Op->Registers.end());
1414 Op->StartLoc = StartLoc;
1415 Op->EndLoc = EndLoc;
1419 static ARMOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
1420 ARMOperand *Op = new ARMOperand(Immediate);
1427 static ARMOperand *CreateMem(unsigned BaseRegNum,
1428 const MCConstantExpr *OffsetImm,
1429 unsigned OffsetRegNum,
1430 ARM_AM::ShiftOpc ShiftType,
1434 ARMOperand *Op = new ARMOperand(Memory);
1435 Op->Mem.BaseRegNum = BaseRegNum;
1436 Op->Mem.OffsetImm = OffsetImm;
1437 Op->Mem.OffsetRegNum = OffsetRegNum;
1438 Op->Mem.ShiftType = ShiftType;
1439 Op->Mem.ShiftImm = ShiftImm;
1440 Op->Mem.isNegative = isNegative;
1446 static ARMOperand *CreatePostIdxReg(unsigned RegNum, bool isAdd,
1447 ARM_AM::ShiftOpc ShiftTy,
1450 ARMOperand *Op = new ARMOperand(PostIndexRegister);
1451 Op->PostIdxReg.RegNum = RegNum;
1452 Op->PostIdxReg.isAdd = isAdd;
1453 Op->PostIdxReg.ShiftTy = ShiftTy;
1454 Op->PostIdxReg.ShiftImm = ShiftImm;
1460 static ARMOperand *CreateMemBarrierOpt(ARM_MB::MemBOpt Opt, SMLoc S) {
1461 ARMOperand *Op = new ARMOperand(MemBarrierOpt);
1462 Op->MBOpt.Val = Opt;
1468 static ARMOperand *CreateProcIFlags(ARM_PROC::IFlags IFlags, SMLoc S) {
1469 ARMOperand *Op = new ARMOperand(ProcIFlags);
1470 Op->IFlags.Val = IFlags;
1476 static ARMOperand *CreateMSRMask(unsigned MMask, SMLoc S) {
1477 ARMOperand *Op = new ARMOperand(MSRMask);
1478 Op->MMask.Val = MMask;
1485 } // end anonymous namespace.
1487 void ARMOperand::print(raw_ostream &OS) const {
1490 OS << "<ARMCC::" << ARMCondCodeToString(getCondCode()) << ">";
1493 OS << "<ccout " << getReg() << ">";
1496 static char MaskStr[][6] = { "()", "(t)", "(e)", "(tt)", "(et)", "(te)",
1497 "(ee)", "(ttt)", "(ett)", "(tet)", "(eet)", "(tte)", "(ete)",
1499 assert((ITMask.Mask & 0xf) == ITMask.Mask);
1500 OS << "<it-mask " << MaskStr[ITMask.Mask] << ">";
1504 OS << "<coprocessor number: " << getCoproc() << ">";
1507 OS << "<coprocessor register: " << getCoproc() << ">";
1510 OS << "<mask: " << getMSRMask() << ">";
1513 getImm()->print(OS);
1516 OS << "<ARM_MB::" << MemBOptToString(getMemBarrierOpt()) << ">";
1520 << " base:" << Mem.BaseRegNum;
1523 case PostIndexRegister:
1524 OS << "post-idx register " << (PostIdxReg.isAdd ? "" : "-")
1525 << PostIdxReg.RegNum;
1526 if (PostIdxReg.ShiftTy != ARM_AM::no_shift)
1527 OS << ARM_AM::getShiftOpcStr(PostIdxReg.ShiftTy) << " "
1528 << PostIdxReg.ShiftImm;
1532 OS << "<ARM_PROC::";
1533 unsigned IFlags = getProcIFlags();
1534 for (int i=2; i >= 0; --i)
1535 if (IFlags & (1 << i))
1536 OS << ARM_PROC::IFlagsToString(1 << i);
1541 OS << "<register " << getReg() << ">";
1543 case ShifterImmediate:
1544 OS << "<shift " << (ShifterImm.isASR ? "asr" : "lsl")
1545 << " #" << ShifterImm.Imm << ">";
1547 case ShiftedRegister:
1548 OS << "<so_reg_reg "
1549 << RegShiftedReg.SrcReg
1550 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedReg.ShiftImm))
1551 << ", " << RegShiftedReg.ShiftReg << ", "
1552 << ARM_AM::getSORegOffset(RegShiftedReg.ShiftImm)
1555 case ShiftedImmediate:
1556 OS << "<so_reg_imm "
1557 << RegShiftedImm.SrcReg
1558 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedImm.ShiftImm))
1559 << ", " << ARM_AM::getSORegOffset(RegShiftedImm.ShiftImm)
1562 case RotateImmediate:
1563 OS << "<ror " << " #" << (RotImm.Imm * 8) << ">";
1565 case BitfieldDescriptor:
1566 OS << "<bitfield " << "lsb: " << Bitfield.LSB
1567 << ", width: " << Bitfield.Width << ">";
1570 case DPRRegisterList:
1571 case SPRRegisterList: {
1572 OS << "<register_list ";
1574 const SmallVectorImpl<unsigned> &RegList = getRegList();
1575 for (SmallVectorImpl<unsigned>::const_iterator
1576 I = RegList.begin(), E = RegList.end(); I != E; ) {
1578 if (++I < E) OS << ", ";
1585 OS << "'" << getToken() << "'";
1590 /// @name Auto-generated Match Functions
1593 static unsigned MatchRegisterName(StringRef Name);
1597 bool ARMAsmParser::ParseRegister(unsigned &RegNo,
1598 SMLoc &StartLoc, SMLoc &EndLoc) {
1599 RegNo = tryParseRegister();
1601 return (RegNo == (unsigned)-1);
1604 /// Try to parse a register name. The token must be an Identifier when called,
1605 /// and if it is a register name the token is eaten and the register number is
1606 /// returned. Otherwise return -1.
1608 int ARMAsmParser::tryParseRegister() {
1609 const AsmToken &Tok = Parser.getTok();
1610 if (Tok.isNot(AsmToken::Identifier)) return -1;
1612 // FIXME: Validate register for the current architecture; we have to do
1613 // validation later, so maybe there is no need for this here.
1614 std::string upperCase = Tok.getString().str();
1615 std::string lowerCase = LowercaseString(upperCase);
1616 unsigned RegNum = MatchRegisterName(lowerCase);
1618 RegNum = StringSwitch<unsigned>(lowerCase)
1619 .Case("r13", ARM::SP)
1620 .Case("r14", ARM::LR)
1621 .Case("r15", ARM::PC)
1622 .Case("ip", ARM::R12)
1625 if (!RegNum) return -1;
1627 Parser.Lex(); // Eat identifier token.
1631 // Try to parse a shifter (e.g., "lsl <amt>"). On success, return 0.
1632 // If a recoverable error occurs, return 1. If an irrecoverable error
1633 // occurs, return -1. An irrecoverable error is one where tokens have been
1634 // consumed in the process of trying to parse the shifter (i.e., when it is
1635 // indeed a shifter operand, but malformed).
1636 int ARMAsmParser::tryParseShiftRegister(
1637 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1638 SMLoc S = Parser.getTok().getLoc();
1639 const AsmToken &Tok = Parser.getTok();
1640 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1642 std::string upperCase = Tok.getString().str();
1643 std::string lowerCase = LowercaseString(upperCase);
1644 ARM_AM::ShiftOpc ShiftTy = StringSwitch<ARM_AM::ShiftOpc>(lowerCase)
1645 .Case("lsl", ARM_AM::lsl)
1646 .Case("lsr", ARM_AM::lsr)
1647 .Case("asr", ARM_AM::asr)
1648 .Case("ror", ARM_AM::ror)
1649 .Case("rrx", ARM_AM::rrx)
1650 .Default(ARM_AM::no_shift);
1652 if (ShiftTy == ARM_AM::no_shift)
1655 Parser.Lex(); // Eat the operator.
1657 // The source register for the shift has already been added to the
1658 // operand list, so we need to pop it off and combine it into the shifted
1659 // register operand instead.
1660 OwningPtr<ARMOperand> PrevOp((ARMOperand*)Operands.pop_back_val());
1661 if (!PrevOp->isReg())
1662 return Error(PrevOp->getStartLoc(), "shift must be of a register");
1663 int SrcReg = PrevOp->getReg();
1666 if (ShiftTy == ARM_AM::rrx) {
1667 // RRX Doesn't have an explicit shift amount. The encoder expects
1668 // the shift register to be the same as the source register. Seems odd,
1672 // Figure out if this is shifted by a constant or a register (for non-RRX).
1673 if (Parser.getTok().is(AsmToken::Hash)) {
1674 Parser.Lex(); // Eat hash.
1675 SMLoc ImmLoc = Parser.getTok().getLoc();
1676 const MCExpr *ShiftExpr = 0;
1677 if (getParser().ParseExpression(ShiftExpr)) {
1678 Error(ImmLoc, "invalid immediate shift value");
1681 // The expression must be evaluatable as an immediate.
1682 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftExpr);
1684 Error(ImmLoc, "invalid immediate shift value");
1687 // Range check the immediate.
1688 // lsl, ror: 0 <= imm <= 31
1689 // lsr, asr: 0 <= imm <= 32
1690 Imm = CE->getValue();
1692 ((ShiftTy == ARM_AM::lsl || ShiftTy == ARM_AM::ror) && Imm > 31) ||
1693 ((ShiftTy == ARM_AM::lsr || ShiftTy == ARM_AM::asr) && Imm > 32)) {
1694 Error(ImmLoc, "immediate shift value out of range");
1697 } else if (Parser.getTok().is(AsmToken::Identifier)) {
1698 ShiftReg = tryParseRegister();
1699 SMLoc L = Parser.getTok().getLoc();
1700 if (ShiftReg == -1) {
1701 Error (L, "expected immediate or register in shift operand");
1705 Error (Parser.getTok().getLoc(),
1706 "expected immediate or register in shift operand");
1711 if (ShiftReg && ShiftTy != ARM_AM::rrx)
1712 Operands.push_back(ARMOperand::CreateShiftedRegister(ShiftTy, SrcReg,
1714 S, Parser.getTok().getLoc()));
1716 Operands.push_back(ARMOperand::CreateShiftedImmediate(ShiftTy, SrcReg, Imm,
1717 S, Parser.getTok().getLoc()));
1723 /// Try to parse a register name. The token must be an Identifier when called.
1724 /// If it's a register, an AsmOperand is created. Another AsmOperand is created
1725 /// if there is a "writeback". 'true' if it's not a register.
1727 /// TODO this is likely to change to allow different register types and or to
1728 /// parse for a specific register type.
1730 tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1731 SMLoc S = Parser.getTok().getLoc();
1732 int RegNo = tryParseRegister();
1736 Operands.push_back(ARMOperand::CreateReg(RegNo, S, Parser.getTok().getLoc()));
1738 const AsmToken &ExclaimTok = Parser.getTok();
1739 if (ExclaimTok.is(AsmToken::Exclaim)) {
1740 Operands.push_back(ARMOperand::CreateToken(ExclaimTok.getString(),
1741 ExclaimTok.getLoc()));
1742 Parser.Lex(); // Eat exclaim token
1748 /// MatchCoprocessorOperandName - Try to parse an coprocessor related
1749 /// instruction with a symbolic operand name. Example: "p1", "p7", "c3",
1751 static int MatchCoprocessorOperandName(StringRef Name, char CoprocOp) {
1752 // Use the same layout as the tablegen'erated register name matcher. Ugly,
1754 switch (Name.size()) {
1757 if (Name[0] != CoprocOp)
1774 if (Name[0] != CoprocOp || Name[1] != '1')
1778 case '0': return 10;
1779 case '1': return 11;
1780 case '2': return 12;
1781 case '3': return 13;
1782 case '4': return 14;
1783 case '5': return 15;
1791 /// parseITCondCode - Try to parse a condition code for an IT instruction.
1792 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1793 parseITCondCode(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1794 SMLoc S = Parser.getTok().getLoc();
1795 const AsmToken &Tok = Parser.getTok();
1796 if (!Tok.is(AsmToken::Identifier))
1797 return MatchOperand_NoMatch;
1798 unsigned CC = StringSwitch<unsigned>(Tok.getString())
1799 .Case("eq", ARMCC::EQ)
1800 .Case("ne", ARMCC::NE)
1801 .Case("hs", ARMCC::HS)
1802 .Case("cs", ARMCC::HS)
1803 .Case("lo", ARMCC::LO)
1804 .Case("cc", ARMCC::LO)
1805 .Case("mi", ARMCC::MI)
1806 .Case("pl", ARMCC::PL)
1807 .Case("vs", ARMCC::VS)
1808 .Case("vc", ARMCC::VC)
1809 .Case("hi", ARMCC::HI)
1810 .Case("ls", ARMCC::LS)
1811 .Case("ge", ARMCC::GE)
1812 .Case("lt", ARMCC::LT)
1813 .Case("gt", ARMCC::GT)
1814 .Case("le", ARMCC::LE)
1815 .Case("al", ARMCC::AL)
1818 return MatchOperand_NoMatch;
1819 Parser.Lex(); // Eat the token.
1821 Operands.push_back(ARMOperand::CreateCondCode(ARMCC::CondCodes(CC), S));
1823 return MatchOperand_Success;
1826 /// parseCoprocNumOperand - Try to parse an coprocessor number operand. The
1827 /// token must be an Identifier when called, and if it is a coprocessor
1828 /// number, the token is eaten and the operand is added to the operand list.
1829 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1830 parseCoprocNumOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1831 SMLoc S = Parser.getTok().getLoc();
1832 const AsmToken &Tok = Parser.getTok();
1833 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1835 int Num = MatchCoprocessorOperandName(Tok.getString(), 'p');
1837 return MatchOperand_NoMatch;
1839 Parser.Lex(); // Eat identifier token.
1840 Operands.push_back(ARMOperand::CreateCoprocNum(Num, S));
1841 return MatchOperand_Success;
1844 /// parseCoprocRegOperand - Try to parse an coprocessor register operand. The
1845 /// token must be an Identifier when called, and if it is a coprocessor
1846 /// number, the token is eaten and the operand is added to the operand list.
1847 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1848 parseCoprocRegOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1849 SMLoc S = Parser.getTok().getLoc();
1850 const AsmToken &Tok = Parser.getTok();
1851 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1853 int Reg = MatchCoprocessorOperandName(Tok.getString(), 'c');
1855 return MatchOperand_NoMatch;
1857 Parser.Lex(); // Eat identifier token.
1858 Operands.push_back(ARMOperand::CreateCoprocReg(Reg, S));
1859 return MatchOperand_Success;
1862 /// Parse a register list, return it if successful else return null. The first
1863 /// token must be a '{' when called.
1865 parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1866 assert(Parser.getTok().is(AsmToken::LCurly) &&
1867 "Token is not a Left Curly Brace");
1868 SMLoc S = Parser.getTok().getLoc();
1870 // Read the rest of the registers in the list.
1871 unsigned PrevRegNum = 0;
1872 SmallVector<std::pair<unsigned, SMLoc>, 32> Registers;
1875 bool IsRange = Parser.getTok().is(AsmToken::Minus);
1876 Parser.Lex(); // Eat non-identifier token.
1878 const AsmToken &RegTok = Parser.getTok();
1879 SMLoc RegLoc = RegTok.getLoc();
1880 if (RegTok.isNot(AsmToken::Identifier)) {
1881 Error(RegLoc, "register expected");
1885 int RegNum = tryParseRegister();
1887 Error(RegLoc, "register expected");
1892 int Reg = PrevRegNum;
1895 Registers.push_back(std::make_pair(Reg, RegLoc));
1896 } while (Reg != RegNum);
1898 Registers.push_back(std::make_pair(RegNum, RegLoc));
1901 PrevRegNum = RegNum;
1902 } while (Parser.getTok().is(AsmToken::Comma) ||
1903 Parser.getTok().is(AsmToken::Minus));
1905 // Process the right curly brace of the list.
1906 const AsmToken &RCurlyTok = Parser.getTok();
1907 if (RCurlyTok.isNot(AsmToken::RCurly)) {
1908 Error(RCurlyTok.getLoc(), "'}' expected");
1912 SMLoc E = RCurlyTok.getLoc();
1913 Parser.Lex(); // Eat right curly brace token.
1915 // Verify the register list.
1916 bool EmittedWarning = false;
1917 unsigned HighRegNum = 0;
1918 BitVector RegMap(32);
1919 for (unsigned i = 0, e = Registers.size(); i != e; ++i) {
1920 const std::pair<unsigned, SMLoc> &RegInfo = Registers[i];
1921 unsigned Reg = getARMRegisterNumbering(RegInfo.first);
1924 Error(RegInfo.second, "register duplicated in register list");
1928 if (!EmittedWarning && Reg < HighRegNum)
1929 Warning(RegInfo.second,
1930 "register not in ascending order in register list");
1933 HighRegNum = std::max(Reg, HighRegNum);
1936 Operands.push_back(ARMOperand::CreateRegList(Registers, S, E));
1940 /// parseMemBarrierOptOperand - Try to parse DSB/DMB data barrier options.
1941 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1942 parseMemBarrierOptOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1943 SMLoc S = Parser.getTok().getLoc();
1944 const AsmToken &Tok = Parser.getTok();
1945 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1946 StringRef OptStr = Tok.getString();
1948 unsigned Opt = StringSwitch<unsigned>(OptStr.slice(0, OptStr.size()))
1949 .Case("sy", ARM_MB::SY)
1950 .Case("st", ARM_MB::ST)
1951 .Case("sh", ARM_MB::ISH)
1952 .Case("ish", ARM_MB::ISH)
1953 .Case("shst", ARM_MB::ISHST)
1954 .Case("ishst", ARM_MB::ISHST)
1955 .Case("nsh", ARM_MB::NSH)
1956 .Case("un", ARM_MB::NSH)
1957 .Case("nshst", ARM_MB::NSHST)
1958 .Case("unst", ARM_MB::NSHST)
1959 .Case("osh", ARM_MB::OSH)
1960 .Case("oshst", ARM_MB::OSHST)
1964 return MatchOperand_NoMatch;
1966 Parser.Lex(); // Eat identifier token.
1967 Operands.push_back(ARMOperand::CreateMemBarrierOpt((ARM_MB::MemBOpt)Opt, S));
1968 return MatchOperand_Success;
1971 /// parseProcIFlagsOperand - Try to parse iflags from CPS instruction.
1972 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1973 parseProcIFlagsOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1974 SMLoc S = Parser.getTok().getLoc();
1975 const AsmToken &Tok = Parser.getTok();
1976 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1977 StringRef IFlagsStr = Tok.getString();
1979 unsigned IFlags = 0;
1980 for (int i = 0, e = IFlagsStr.size(); i != e; ++i) {
1981 unsigned Flag = StringSwitch<unsigned>(IFlagsStr.substr(i, 1))
1982 .Case("a", ARM_PROC::A)
1983 .Case("i", ARM_PROC::I)
1984 .Case("f", ARM_PROC::F)
1987 // If some specific iflag is already set, it means that some letter is
1988 // present more than once, this is not acceptable.
1989 if (Flag == ~0U || (IFlags & Flag))
1990 return MatchOperand_NoMatch;
1995 Parser.Lex(); // Eat identifier token.
1996 Operands.push_back(ARMOperand::CreateProcIFlags((ARM_PROC::IFlags)IFlags, S));
1997 return MatchOperand_Success;
2000 /// parseMSRMaskOperand - Try to parse mask flags from MSR instruction.
2001 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2002 parseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2003 SMLoc S = Parser.getTok().getLoc();
2004 const AsmToken &Tok = Parser.getTok();
2005 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
2006 StringRef Mask = Tok.getString();
2008 // Split spec_reg from flag, example: CPSR_sxf => "CPSR" and "sxf"
2009 size_t Start = 0, Next = Mask.find('_');
2010 StringRef Flags = "";
2011 std::string SpecReg = LowercaseString(Mask.slice(Start, Next));
2012 if (Next != StringRef::npos)
2013 Flags = Mask.slice(Next+1, Mask.size());
2015 // FlagsVal contains the complete mask:
2017 // 4: Special Reg (cpsr, apsr => 0; spsr => 1)
2018 unsigned FlagsVal = 0;
2020 if (SpecReg == "apsr") {
2021 FlagsVal = StringSwitch<unsigned>(Flags)
2022 .Case("nzcvq", 0x8) // same as CPSR_f
2023 .Case("g", 0x4) // same as CPSR_s
2024 .Case("nzcvqg", 0xc) // same as CPSR_fs
2027 if (FlagsVal == ~0U) {
2029 return MatchOperand_NoMatch;
2031 FlagsVal = 0; // No flag
2033 } else if (SpecReg == "cpsr" || SpecReg == "spsr") {
2034 if (Flags == "all") // cpsr_all is an alias for cpsr_fc
2036 for (int i = 0, e = Flags.size(); i != e; ++i) {
2037 unsigned Flag = StringSwitch<unsigned>(Flags.substr(i, 1))
2044 // If some specific flag is already set, it means that some letter is
2045 // present more than once, this is not acceptable.
2046 if (FlagsVal == ~0U || (FlagsVal & Flag))
2047 return MatchOperand_NoMatch;
2050 } else // No match for special register.
2051 return MatchOperand_NoMatch;
2053 // Special register without flags are equivalent to "fc" flags.
2057 // Bit 4: Special Reg (cpsr, apsr => 0; spsr => 1)
2058 if (SpecReg == "spsr")
2061 Parser.Lex(); // Eat identifier token.
2062 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
2063 return MatchOperand_Success;
2066 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2067 parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands, StringRef Op,
2068 int Low, int High) {
2069 const AsmToken &Tok = Parser.getTok();
2070 if (Tok.isNot(AsmToken::Identifier)) {
2071 Error(Parser.getTok().getLoc(), Op + " operand expected.");
2072 return MatchOperand_ParseFail;
2074 StringRef ShiftName = Tok.getString();
2075 std::string LowerOp = LowercaseString(Op);
2076 std::string UpperOp = UppercaseString(Op);
2077 if (ShiftName != LowerOp && ShiftName != UpperOp) {
2078 Error(Parser.getTok().getLoc(), Op + " operand expected.");
2079 return MatchOperand_ParseFail;
2081 Parser.Lex(); // Eat shift type token.
2083 // There must be a '#' and a shift amount.
2084 if (Parser.getTok().isNot(AsmToken::Hash)) {
2085 Error(Parser.getTok().getLoc(), "'#' expected");
2086 return MatchOperand_ParseFail;
2088 Parser.Lex(); // Eat hash token.
2090 const MCExpr *ShiftAmount;
2091 SMLoc Loc = Parser.getTok().getLoc();
2092 if (getParser().ParseExpression(ShiftAmount)) {
2093 Error(Loc, "illegal expression");
2094 return MatchOperand_ParseFail;
2096 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2098 Error(Loc, "constant expression expected");
2099 return MatchOperand_ParseFail;
2101 int Val = CE->getValue();
2102 if (Val < Low || Val > High) {
2103 Error(Loc, "immediate value out of range");
2104 return MatchOperand_ParseFail;
2107 Operands.push_back(ARMOperand::CreateImm(CE, Loc, Parser.getTok().getLoc()));
2109 return MatchOperand_Success;
2112 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2113 parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2114 const AsmToken &Tok = Parser.getTok();
2115 SMLoc S = Tok.getLoc();
2116 if (Tok.isNot(AsmToken::Identifier)) {
2117 Error(Tok.getLoc(), "'be' or 'le' operand expected");
2118 return MatchOperand_ParseFail;
2120 int Val = StringSwitch<int>(Tok.getString())
2124 Parser.Lex(); // Eat the token.
2127 Error(Tok.getLoc(), "'be' or 'le' operand expected");
2128 return MatchOperand_ParseFail;
2130 Operands.push_back(ARMOperand::CreateImm(MCConstantExpr::Create(Val,
2132 S, Parser.getTok().getLoc()));
2133 return MatchOperand_Success;
2136 /// parseShifterImm - Parse the shifter immediate operand for SSAT/USAT
2137 /// instructions. Legal values are:
2138 /// lsl #n 'n' in [0,31]
2139 /// asr #n 'n' in [1,32]
2140 /// n == 32 encoded as n == 0.
2141 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2142 parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2143 const AsmToken &Tok = Parser.getTok();
2144 SMLoc S = Tok.getLoc();
2145 if (Tok.isNot(AsmToken::Identifier)) {
2146 Error(S, "shift operator 'asr' or 'lsl' expected");
2147 return MatchOperand_ParseFail;
2149 StringRef ShiftName = Tok.getString();
2151 if (ShiftName == "lsl" || ShiftName == "LSL")
2153 else if (ShiftName == "asr" || ShiftName == "ASR")
2156 Error(S, "shift operator 'asr' or 'lsl' expected");
2157 return MatchOperand_ParseFail;
2159 Parser.Lex(); // Eat the operator.
2161 // A '#' and a shift amount.
2162 if (Parser.getTok().isNot(AsmToken::Hash)) {
2163 Error(Parser.getTok().getLoc(), "'#' expected");
2164 return MatchOperand_ParseFail;
2166 Parser.Lex(); // Eat hash token.
2168 const MCExpr *ShiftAmount;
2169 SMLoc E = Parser.getTok().getLoc();
2170 if (getParser().ParseExpression(ShiftAmount)) {
2171 Error(E, "malformed shift expression");
2172 return MatchOperand_ParseFail;
2174 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2176 Error(E, "shift amount must be an immediate");
2177 return MatchOperand_ParseFail;
2180 int64_t Val = CE->getValue();
2182 // Shift amount must be in [1,32]
2183 if (Val < 1 || Val > 32) {
2184 Error(E, "'asr' shift amount must be in range [1,32]");
2185 return MatchOperand_ParseFail;
2187 // asr #32 encoded as asr #0.
2188 if (Val == 32) Val = 0;
2190 // Shift amount must be in [1,32]
2191 if (Val < 0 || Val > 31) {
2192 Error(E, "'lsr' shift amount must be in range [0,31]");
2193 return MatchOperand_ParseFail;
2197 E = Parser.getTok().getLoc();
2198 Operands.push_back(ARMOperand::CreateShifterImm(isASR, Val, S, E));
2200 return MatchOperand_Success;
2203 /// parseRotImm - Parse the shifter immediate operand for SXTB/UXTB family
2204 /// of instructions. Legal values are:
2205 /// ror #n 'n' in {0, 8, 16, 24}
2206 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2207 parseRotImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2208 const AsmToken &Tok = Parser.getTok();
2209 SMLoc S = Tok.getLoc();
2210 if (Tok.isNot(AsmToken::Identifier)) {
2211 Error(S, "rotate operator 'ror' expected");
2212 return MatchOperand_ParseFail;
2214 StringRef ShiftName = Tok.getString();
2215 if (ShiftName != "ror" && ShiftName != "ROR") {
2216 Error(S, "rotate operator 'ror' expected");
2217 return MatchOperand_ParseFail;
2219 Parser.Lex(); // Eat the operator.
2221 // A '#' and a rotate amount.
2222 if (Parser.getTok().isNot(AsmToken::Hash)) {
2223 Error(Parser.getTok().getLoc(), "'#' expected");
2224 return MatchOperand_ParseFail;
2226 Parser.Lex(); // Eat hash token.
2228 const MCExpr *ShiftAmount;
2229 SMLoc E = Parser.getTok().getLoc();
2230 if (getParser().ParseExpression(ShiftAmount)) {
2231 Error(E, "malformed rotate expression");
2232 return MatchOperand_ParseFail;
2234 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2236 Error(E, "rotate amount must be an immediate");
2237 return MatchOperand_ParseFail;
2240 int64_t Val = CE->getValue();
2241 // Shift amount must be in {0, 8, 16, 24} (0 is undocumented extension)
2242 // normally, zero is represented in asm by omitting the rotate operand
2244 if (Val != 8 && Val != 16 && Val != 24 && Val != 0) {
2245 Error(E, "'ror' rotate amount must be 8, 16, or 24");
2246 return MatchOperand_ParseFail;
2249 E = Parser.getTok().getLoc();
2250 Operands.push_back(ARMOperand::CreateRotImm(Val, S, E));
2252 return MatchOperand_Success;
2255 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2256 parseBitfield(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2257 SMLoc S = Parser.getTok().getLoc();
2258 // The bitfield descriptor is really two operands, the LSB and the width.
2259 if (Parser.getTok().isNot(AsmToken::Hash)) {
2260 Error(Parser.getTok().getLoc(), "'#' expected");
2261 return MatchOperand_ParseFail;
2263 Parser.Lex(); // Eat hash token.
2265 const MCExpr *LSBExpr;
2266 SMLoc E = Parser.getTok().getLoc();
2267 if (getParser().ParseExpression(LSBExpr)) {
2268 Error(E, "malformed immediate expression");
2269 return MatchOperand_ParseFail;
2271 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(LSBExpr);
2273 Error(E, "'lsb' operand must be an immediate");
2274 return MatchOperand_ParseFail;
2277 int64_t LSB = CE->getValue();
2278 // The LSB must be in the range [0,31]
2279 if (LSB < 0 || LSB > 31) {
2280 Error(E, "'lsb' operand must be in the range [0,31]");
2281 return MatchOperand_ParseFail;
2283 E = Parser.getTok().getLoc();
2285 // Expect another immediate operand.
2286 if (Parser.getTok().isNot(AsmToken::Comma)) {
2287 Error(Parser.getTok().getLoc(), "too few operands");
2288 return MatchOperand_ParseFail;
2290 Parser.Lex(); // Eat hash token.
2291 if (Parser.getTok().isNot(AsmToken::Hash)) {
2292 Error(Parser.getTok().getLoc(), "'#' expected");
2293 return MatchOperand_ParseFail;
2295 Parser.Lex(); // Eat hash token.
2297 const MCExpr *WidthExpr;
2298 if (getParser().ParseExpression(WidthExpr)) {
2299 Error(E, "malformed immediate expression");
2300 return MatchOperand_ParseFail;
2302 CE = dyn_cast<MCConstantExpr>(WidthExpr);
2304 Error(E, "'width' operand must be an immediate");
2305 return MatchOperand_ParseFail;
2308 int64_t Width = CE->getValue();
2309 // The LSB must be in the range [1,32-lsb]
2310 if (Width < 1 || Width > 32 - LSB) {
2311 Error(E, "'width' operand must be in the range [1,32-lsb]");
2312 return MatchOperand_ParseFail;
2314 E = Parser.getTok().getLoc();
2316 Operands.push_back(ARMOperand::CreateBitfield(LSB, Width, S, E));
2318 return MatchOperand_Success;
2321 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2322 parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2323 // Check for a post-index addressing register operand. Specifically:
2324 // postidx_reg := '+' register {, shift}
2325 // | '-' register {, shift}
2326 // | register {, shift}
2328 // This method must return MatchOperand_NoMatch without consuming any tokens
2329 // in the case where there is no match, as other alternatives take other
2331 AsmToken Tok = Parser.getTok();
2332 SMLoc S = Tok.getLoc();
2333 bool haveEaten = false;
2336 if (Tok.is(AsmToken::Plus)) {
2337 Parser.Lex(); // Eat the '+' token.
2339 } else if (Tok.is(AsmToken::Minus)) {
2340 Parser.Lex(); // Eat the '-' token.
2344 if (Parser.getTok().is(AsmToken::Identifier))
2345 Reg = tryParseRegister();
2348 return MatchOperand_NoMatch;
2349 Error(Parser.getTok().getLoc(), "register expected");
2350 return MatchOperand_ParseFail;
2352 SMLoc E = Parser.getTok().getLoc();
2354 ARM_AM::ShiftOpc ShiftTy = ARM_AM::no_shift;
2355 unsigned ShiftImm = 0;
2356 if (Parser.getTok().is(AsmToken::Comma)) {
2357 Parser.Lex(); // Eat the ','.
2358 if (parseMemRegOffsetShift(ShiftTy, ShiftImm))
2359 return MatchOperand_ParseFail;
2362 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ShiftTy,
2365 return MatchOperand_Success;
2368 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2369 parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2370 // Check for a post-index addressing register operand. Specifically:
2371 // am3offset := '+' register
2378 // This method must return MatchOperand_NoMatch without consuming any tokens
2379 // in the case where there is no match, as other alternatives take other
2381 AsmToken Tok = Parser.getTok();
2382 SMLoc S = Tok.getLoc();
2384 // Do immediates first, as we always parse those if we have a '#'.
2385 if (Parser.getTok().is(AsmToken::Hash)) {
2386 Parser.Lex(); // Eat the '#'.
2387 // Explicitly look for a '-', as we need to encode negative zero
2389 bool isNegative = Parser.getTok().is(AsmToken::Minus);
2390 const MCExpr *Offset;
2391 if (getParser().ParseExpression(Offset))
2392 return MatchOperand_ParseFail;
2393 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2395 Error(S, "constant expression expected");
2396 return MatchOperand_ParseFail;
2398 SMLoc E = Tok.getLoc();
2399 // Negative zero is encoded as the flag value INT32_MIN.
2400 int32_t Val = CE->getValue();
2401 if (isNegative && Val == 0)
2405 ARMOperand::CreateImm(MCConstantExpr::Create(Val, getContext()), S, E));
2407 return MatchOperand_Success;
2411 bool haveEaten = false;
2414 if (Tok.is(AsmToken::Plus)) {
2415 Parser.Lex(); // Eat the '+' token.
2417 } else if (Tok.is(AsmToken::Minus)) {
2418 Parser.Lex(); // Eat the '-' token.
2422 if (Parser.getTok().is(AsmToken::Identifier))
2423 Reg = tryParseRegister();
2426 return MatchOperand_NoMatch;
2427 Error(Parser.getTok().getLoc(), "register expected");
2428 return MatchOperand_ParseFail;
2430 SMLoc E = Parser.getTok().getLoc();
2432 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ARM_AM::no_shift,
2435 return MatchOperand_Success;
2438 /// cvtT2LdrdPre - Convert parsed operands to MCInst.
2439 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2440 /// when they refer multiple MIOperands inside a single one.
2442 cvtT2LdrdPre(MCInst &Inst, unsigned Opcode,
2443 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2445 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2446 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2447 // Create a writeback register dummy placeholder.
2448 Inst.addOperand(MCOperand::CreateReg(0));
2450 ((ARMOperand*)Operands[4])->addMemImm8s4OffsetOperands(Inst, 2);
2452 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2456 /// cvtT2StrdPre - Convert parsed operands to MCInst.
2457 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2458 /// when they refer multiple MIOperands inside a single one.
2460 cvtT2StrdPre(MCInst &Inst, unsigned Opcode,
2461 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2462 // Create a writeback register dummy placeholder.
2463 Inst.addOperand(MCOperand::CreateReg(0));
2465 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2466 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2468 ((ARMOperand*)Operands[4])->addMemImm8s4OffsetOperands(Inst, 2);
2470 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2474 /// cvtLdWriteBackRegT2AddrModeImm8 - Convert parsed operands to MCInst.
2475 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2476 /// when they refer multiple MIOperands inside a single one.
2478 cvtLdWriteBackRegT2AddrModeImm8(MCInst &Inst, unsigned Opcode,
2479 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2480 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2482 // Create a writeback register dummy placeholder.
2483 Inst.addOperand(MCOperand::CreateImm(0));
2485 ((ARMOperand*)Operands[3])->addMemImm8OffsetOperands(Inst, 2);
2486 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2490 /// cvtLdWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2491 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2492 /// when they refer multiple MIOperands inside a single one.
2494 cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2495 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2496 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2498 // Create a writeback register dummy placeholder.
2499 Inst.addOperand(MCOperand::CreateImm(0));
2501 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2502 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2506 /// cvtLdWriteBackRegAddrModeImm12 - Convert parsed operands to MCInst.
2507 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2508 /// when they refer multiple MIOperands inside a single one.
2510 cvtLdWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
2511 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2512 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2514 // Create a writeback register dummy placeholder.
2515 Inst.addOperand(MCOperand::CreateImm(0));
2517 ((ARMOperand*)Operands[3])->addMemImm12OffsetOperands(Inst, 2);
2518 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2523 /// cvtStWriteBackRegAddrModeImm12 - Convert parsed operands to MCInst.
2524 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2525 /// when they refer multiple MIOperands inside a single one.
2527 cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
2528 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2529 // Create a writeback register dummy placeholder.
2530 Inst.addOperand(MCOperand::CreateImm(0));
2531 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2532 ((ARMOperand*)Operands[3])->addMemImm12OffsetOperands(Inst, 2);
2533 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2537 /// cvtStWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2538 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2539 /// when they refer multiple MIOperands inside a single one.
2541 cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2542 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2543 // Create a writeback register dummy placeholder.
2544 Inst.addOperand(MCOperand::CreateImm(0));
2545 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2546 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2547 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2551 /// cvtStWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
2552 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2553 /// when they refer multiple MIOperands inside a single one.
2555 cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
2556 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2557 // Create a writeback register dummy placeholder.
2558 Inst.addOperand(MCOperand::CreateImm(0));
2559 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2560 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
2561 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2565 /// cvtLdExtTWriteBackImm - Convert parsed operands to MCInst.
2566 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2567 /// when they refer multiple MIOperands inside a single one.
2569 cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2570 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2572 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2573 // Create a writeback register dummy placeholder.
2574 Inst.addOperand(MCOperand::CreateImm(0));
2576 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2578 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2580 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2584 /// cvtLdExtTWriteBackReg - Convert parsed operands to MCInst.
2585 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2586 /// when they refer multiple MIOperands inside a single one.
2588 cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2589 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2591 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2592 // Create a writeback register dummy placeholder.
2593 Inst.addOperand(MCOperand::CreateImm(0));
2595 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2597 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2599 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2603 /// cvtStExtTWriteBackImm - Convert parsed operands to MCInst.
2604 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2605 /// when they refer multiple MIOperands inside a single one.
2607 cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2608 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2609 // Create a writeback register dummy placeholder.
2610 Inst.addOperand(MCOperand::CreateImm(0));
2612 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2614 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2616 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2618 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2622 /// cvtStExtTWriteBackReg - Convert parsed operands to MCInst.
2623 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2624 /// when they refer multiple MIOperands inside a single one.
2626 cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2627 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2628 // Create a writeback register dummy placeholder.
2629 Inst.addOperand(MCOperand::CreateImm(0));
2631 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2633 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2635 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2637 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2641 /// cvtLdrdPre - Convert parsed operands to MCInst.
2642 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2643 /// when they refer multiple MIOperands inside a single one.
2645 cvtLdrdPre(MCInst &Inst, unsigned Opcode,
2646 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2648 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2649 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2650 // Create a writeback register dummy placeholder.
2651 Inst.addOperand(MCOperand::CreateImm(0));
2653 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
2655 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2659 /// cvtStrdPre - Convert parsed operands to MCInst.
2660 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2661 /// when they refer multiple MIOperands inside a single one.
2663 cvtStrdPre(MCInst &Inst, unsigned Opcode,
2664 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2665 // Create a writeback register dummy placeholder.
2666 Inst.addOperand(MCOperand::CreateImm(0));
2668 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2669 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2671 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
2673 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2677 /// cvtLdWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
2678 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2679 /// when they refer multiple MIOperands inside a single one.
2681 cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
2682 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2683 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2684 // Create a writeback register dummy placeholder.
2685 Inst.addOperand(MCOperand::CreateImm(0));
2686 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
2687 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2691 /// cvtThumbMultiple- Convert parsed operands to MCInst.
2692 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2693 /// when they refer multiple MIOperands inside a single one.
2695 cvtThumbMultiply(MCInst &Inst, unsigned Opcode,
2696 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2697 // The second source operand must be the same register as the destination
2699 if (Operands.size() == 6 &&
2700 (((ARMOperand*)Operands[3])->getReg() !=
2701 ((ARMOperand*)Operands[5])->getReg()) &&
2702 (((ARMOperand*)Operands[3])->getReg() !=
2703 ((ARMOperand*)Operands[4])->getReg())) {
2704 Error(Operands[3]->getStartLoc(),
2705 "destination register must match source register");
2708 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2709 ((ARMOperand*)Operands[1])->addCCOutOperands(Inst, 1);
2710 ((ARMOperand*)Operands[4])->addRegOperands(Inst, 1);
2711 // If we have a three-operand form, use that, else the second source operand
2712 // is just the destination operand again.
2713 if (Operands.size() == 6)
2714 ((ARMOperand*)Operands[5])->addRegOperands(Inst, 1);
2716 Inst.addOperand(Inst.getOperand(0));
2717 ((ARMOperand*)Operands[2])->addCondCodeOperands(Inst, 2);
2722 /// Parse an ARM memory expression, return false if successful else return true
2723 /// or an error. The first token must be a '[' when called.
2725 parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2727 assert(Parser.getTok().is(AsmToken::LBrac) &&
2728 "Token is not a Left Bracket");
2729 S = Parser.getTok().getLoc();
2730 Parser.Lex(); // Eat left bracket token.
2732 const AsmToken &BaseRegTok = Parser.getTok();
2733 int BaseRegNum = tryParseRegister();
2734 if (BaseRegNum == -1)
2735 return Error(BaseRegTok.getLoc(), "register expected");
2737 // The next token must either be a comma or a closing bracket.
2738 const AsmToken &Tok = Parser.getTok();
2739 if (!Tok.is(AsmToken::Comma) && !Tok.is(AsmToken::RBrac))
2740 return Error(Tok.getLoc(), "malformed memory operand");
2742 if (Tok.is(AsmToken::RBrac)) {
2744 Parser.Lex(); // Eat right bracket token.
2746 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0, ARM_AM::no_shift,
2752 assert(Tok.is(AsmToken::Comma) && "Lost comma in memory operand?!");
2753 Parser.Lex(); // Eat the comma.
2755 // If we have a '#' it's an immediate offset, else assume it's a register
2757 if (Parser.getTok().is(AsmToken::Hash)) {
2758 Parser.Lex(); // Eat the '#'.
2759 E = Parser.getTok().getLoc();
2761 bool isNegative = getParser().getTok().is(AsmToken::Minus);
2762 const MCExpr *Offset;
2763 if (getParser().ParseExpression(Offset))
2766 // The expression has to be a constant. Memory references with relocations
2767 // don't come through here, as they use the <label> forms of the relevant
2769 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2771 return Error (E, "constant expression expected");
2773 // If the constant was #-0, represent it as INT32_MIN.
2774 int32_t Val = CE->getValue();
2775 if (isNegative && Val == 0)
2776 CE = MCConstantExpr::Create(INT32_MIN, getContext());
2778 // Now we should have the closing ']'
2779 E = Parser.getTok().getLoc();
2780 if (Parser.getTok().isNot(AsmToken::RBrac))
2781 return Error(E, "']' expected");
2782 Parser.Lex(); // Eat right bracket token.
2784 // Don't worry about range checking the value here. That's handled by
2785 // the is*() predicates.
2786 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, CE, 0,
2787 ARM_AM::no_shift, 0, false, S,E));
2789 // If there's a pre-indexing writeback marker, '!', just add it as a token
2791 if (Parser.getTok().is(AsmToken::Exclaim)) {
2792 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2793 Parser.Lex(); // Eat the '!'.
2799 // The register offset is optionally preceded by a '+' or '-'
2800 bool isNegative = false;
2801 if (Parser.getTok().is(AsmToken::Minus)) {
2803 Parser.Lex(); // Eat the '-'.
2804 } else if (Parser.getTok().is(AsmToken::Plus)) {
2806 Parser.Lex(); // Eat the '+'.
2809 E = Parser.getTok().getLoc();
2810 int OffsetRegNum = tryParseRegister();
2811 if (OffsetRegNum == -1)
2812 return Error(E, "register expected");
2814 // If there's a shift operator, handle it.
2815 ARM_AM::ShiftOpc ShiftType = ARM_AM::no_shift;
2816 unsigned ShiftImm = 0;
2817 if (Parser.getTok().is(AsmToken::Comma)) {
2818 Parser.Lex(); // Eat the ','.
2819 if (parseMemRegOffsetShift(ShiftType, ShiftImm))
2823 // Now we should have the closing ']'
2824 E = Parser.getTok().getLoc();
2825 if (Parser.getTok().isNot(AsmToken::RBrac))
2826 return Error(E, "']' expected");
2827 Parser.Lex(); // Eat right bracket token.
2829 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, OffsetRegNum,
2830 ShiftType, ShiftImm, isNegative,
2833 // If there's a pre-indexing writeback marker, '!', just add it as a token
2835 if (Parser.getTok().is(AsmToken::Exclaim)) {
2836 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2837 Parser.Lex(); // Eat the '!'.
2843 /// parseMemRegOffsetShift - one of these two:
2844 /// ( lsl | lsr | asr | ror ) , # shift_amount
2846 /// return true if it parses a shift otherwise it returns false.
2847 bool ARMAsmParser::parseMemRegOffsetShift(ARM_AM::ShiftOpc &St,
2849 SMLoc Loc = Parser.getTok().getLoc();
2850 const AsmToken &Tok = Parser.getTok();
2851 if (Tok.isNot(AsmToken::Identifier))
2853 StringRef ShiftName = Tok.getString();
2854 if (ShiftName == "lsl" || ShiftName == "LSL")
2856 else if (ShiftName == "lsr" || ShiftName == "LSR")
2858 else if (ShiftName == "asr" || ShiftName == "ASR")
2860 else if (ShiftName == "ror" || ShiftName == "ROR")
2862 else if (ShiftName == "rrx" || ShiftName == "RRX")
2865 return Error(Loc, "illegal shift operator");
2866 Parser.Lex(); // Eat shift type token.
2868 // rrx stands alone.
2870 if (St != ARM_AM::rrx) {
2871 Loc = Parser.getTok().getLoc();
2872 // A '#' and a shift amount.
2873 const AsmToken &HashTok = Parser.getTok();
2874 if (HashTok.isNot(AsmToken::Hash))
2875 return Error(HashTok.getLoc(), "'#' expected");
2876 Parser.Lex(); // Eat hash token.
2879 if (getParser().ParseExpression(Expr))
2881 // Range check the immediate.
2882 // lsl, ror: 0 <= imm <= 31
2883 // lsr, asr: 0 <= imm <= 32
2884 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
2886 return Error(Loc, "shift amount must be an immediate");
2887 int64_t Imm = CE->getValue();
2889 ((St == ARM_AM::lsl || St == ARM_AM::ror) && Imm > 31) ||
2890 ((St == ARM_AM::lsr || St == ARM_AM::asr) && Imm > 32))
2891 return Error(Loc, "immediate shift value out of range");
2898 /// Parse a arm instruction operand. For now this parses the operand regardless
2899 /// of the mnemonic.
2900 bool ARMAsmParser::parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2901 StringRef Mnemonic) {
2904 // Check if the current operand has a custom associated parser, if so, try to
2905 // custom parse the operand, or fallback to the general approach.
2906 OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
2907 if (ResTy == MatchOperand_Success)
2909 // If there wasn't a custom match, try the generic matcher below. Otherwise,
2910 // there was a match, but an error occurred, in which case, just return that
2911 // the operand parsing failed.
2912 if (ResTy == MatchOperand_ParseFail)
2915 switch (getLexer().getKind()) {
2917 Error(Parser.getTok().getLoc(), "unexpected token in operand");
2919 case AsmToken::Identifier: {
2920 if (!tryParseRegisterWithWriteBack(Operands))
2922 int Res = tryParseShiftRegister(Operands);
2923 if (Res == 0) // success
2925 else if (Res == -1) // irrecoverable error
2928 // Fall though for the Identifier case that is not a register or a
2931 case AsmToken::Integer: // things like 1f and 2b as a branch targets
2932 case AsmToken::Dot: { // . as a branch target
2933 // This was not a register so parse other operands that start with an
2934 // identifier (like labels) as expressions and create them as immediates.
2935 const MCExpr *IdVal;
2936 S = Parser.getTok().getLoc();
2937 if (getParser().ParseExpression(IdVal))
2939 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2940 Operands.push_back(ARMOperand::CreateImm(IdVal, S, E));
2943 case AsmToken::LBrac:
2944 return parseMemory(Operands);
2945 case AsmToken::LCurly:
2946 return parseRegisterList(Operands);
2947 case AsmToken::Hash: {
2948 // #42 -> immediate.
2949 // TODO: ":lower16:" and ":upper16:" modifiers after # before immediate
2950 S = Parser.getTok().getLoc();
2952 bool isNegative = Parser.getTok().is(AsmToken::Minus);
2953 const MCExpr *ImmVal;
2954 if (getParser().ParseExpression(ImmVal))
2956 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ImmVal);
2958 Error(S, "constant expression expected");
2959 return MatchOperand_ParseFail;
2961 int32_t Val = CE->getValue();
2962 if (isNegative && Val == 0)
2963 ImmVal = MCConstantExpr::Create(INT32_MIN, getContext());
2964 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2965 Operands.push_back(ARMOperand::CreateImm(ImmVal, S, E));
2968 case AsmToken::Colon: {
2969 // ":lower16:" and ":upper16:" expression prefixes
2970 // FIXME: Check it's an expression prefix,
2971 // e.g. (FOO - :lower16:BAR) isn't legal.
2972 ARMMCExpr::VariantKind RefKind;
2973 if (parsePrefix(RefKind))
2976 const MCExpr *SubExprVal;
2977 if (getParser().ParseExpression(SubExprVal))
2980 const MCExpr *ExprVal = ARMMCExpr::Create(RefKind, SubExprVal,
2982 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2983 Operands.push_back(ARMOperand::CreateImm(ExprVal, S, E));
2989 // parsePrefix - Parse ARM 16-bit relocations expression prefix, i.e.
2990 // :lower16: and :upper16:.
2991 bool ARMAsmParser::parsePrefix(ARMMCExpr::VariantKind &RefKind) {
2992 RefKind = ARMMCExpr::VK_ARM_None;
2994 // :lower16: and :upper16: modifiers
2995 assert(getLexer().is(AsmToken::Colon) && "expected a :");
2996 Parser.Lex(); // Eat ':'
2998 if (getLexer().isNot(AsmToken::Identifier)) {
2999 Error(Parser.getTok().getLoc(), "expected prefix identifier in operand");
3003 StringRef IDVal = Parser.getTok().getIdentifier();
3004 if (IDVal == "lower16") {
3005 RefKind = ARMMCExpr::VK_ARM_LO16;
3006 } else if (IDVal == "upper16") {
3007 RefKind = ARMMCExpr::VK_ARM_HI16;
3009 Error(Parser.getTok().getLoc(), "unexpected prefix in operand");
3014 if (getLexer().isNot(AsmToken::Colon)) {
3015 Error(Parser.getTok().getLoc(), "unexpected token after prefix");
3018 Parser.Lex(); // Eat the last ':'
3023 ARMAsmParser::applyPrefixToExpr(const MCExpr *E,
3024 MCSymbolRefExpr::VariantKind Variant) {
3025 // Recurse over the given expression, rebuilding it to apply the given variant
3026 // to the leftmost symbol.
3027 if (Variant == MCSymbolRefExpr::VK_None)
3030 switch (E->getKind()) {
3031 case MCExpr::Target:
3032 llvm_unreachable("Can't handle target expr yet");
3033 case MCExpr::Constant:
3034 llvm_unreachable("Can't handle lower16/upper16 of constant yet");
3036 case MCExpr::SymbolRef: {
3037 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
3039 if (SRE->getKind() != MCSymbolRefExpr::VK_None)
3042 return MCSymbolRefExpr::Create(&SRE->getSymbol(), Variant, getContext());
3046 llvm_unreachable("Can't handle unary expressions yet");
3048 case MCExpr::Binary: {
3049 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
3050 const MCExpr *LHS = applyPrefixToExpr(BE->getLHS(), Variant);
3051 const MCExpr *RHS = BE->getRHS();
3055 return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, getContext());
3059 assert(0 && "Invalid expression kind!");
3063 /// \brief Given a mnemonic, split out possible predication code and carry
3064 /// setting letters to form a canonical mnemonic and flags.
3066 // FIXME: Would be nice to autogen this.
3067 // FIXME: This is a bit of a maze of special cases.
3068 StringRef ARMAsmParser::splitMnemonic(StringRef Mnemonic,
3069 unsigned &PredicationCode,
3071 unsigned &ProcessorIMod,
3072 StringRef &ITMask) {
3073 PredicationCode = ARMCC::AL;
3074 CarrySetting = false;
3077 // Ignore some mnemonics we know aren't predicated forms.
3079 // FIXME: Would be nice to autogen this.
3080 if ((Mnemonic == "movs" && isThumb()) ||
3081 Mnemonic == "teq" || Mnemonic == "vceq" || Mnemonic == "svc" ||
3082 Mnemonic == "mls" || Mnemonic == "smmls" || Mnemonic == "vcls" ||
3083 Mnemonic == "vmls" || Mnemonic == "vnmls" || Mnemonic == "vacge" ||
3084 Mnemonic == "vcge" || Mnemonic == "vclt" || Mnemonic == "vacgt" ||
3085 Mnemonic == "vcgt" || Mnemonic == "vcle" || Mnemonic == "smlal" ||
3086 Mnemonic == "umaal" || Mnemonic == "umlal" || Mnemonic == "vabal" ||
3087 Mnemonic == "vmlal" || Mnemonic == "vpadal" || Mnemonic == "vqdmlal")
3090 // First, split out any predication code. Ignore mnemonics we know aren't
3091 // predicated but do have a carry-set and so weren't caught above.
3092 if (Mnemonic != "adcs" && Mnemonic != "bics" && Mnemonic != "movs" &&
3093 Mnemonic != "muls" && Mnemonic != "smlals" && Mnemonic != "smulls" &&
3094 Mnemonic != "umlals" && Mnemonic != "umulls" && Mnemonic != "lsls" &&
3095 Mnemonic != "sbcs" && Mnemonic != "rscs") {
3096 unsigned CC = StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2))
3097 .Case("eq", ARMCC::EQ)
3098 .Case("ne", ARMCC::NE)
3099 .Case("hs", ARMCC::HS)
3100 .Case("cs", ARMCC::HS)
3101 .Case("lo", ARMCC::LO)
3102 .Case("cc", ARMCC::LO)
3103 .Case("mi", ARMCC::MI)
3104 .Case("pl", ARMCC::PL)
3105 .Case("vs", ARMCC::VS)
3106 .Case("vc", ARMCC::VC)
3107 .Case("hi", ARMCC::HI)
3108 .Case("ls", ARMCC::LS)
3109 .Case("ge", ARMCC::GE)
3110 .Case("lt", ARMCC::LT)
3111 .Case("gt", ARMCC::GT)
3112 .Case("le", ARMCC::LE)
3113 .Case("al", ARMCC::AL)
3116 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 2);
3117 PredicationCode = CC;
3121 // Next, determine if we have a carry setting bit. We explicitly ignore all
3122 // the instructions we know end in 's'.
3123 if (Mnemonic.endswith("s") &&
3124 !(Mnemonic == "cps" || Mnemonic == "mls" ||
3125 Mnemonic == "mrs" || Mnemonic == "smmls" || Mnemonic == "vabs" ||
3126 Mnemonic == "vcls" || Mnemonic == "vmls" || Mnemonic == "vmrs" ||
3127 Mnemonic == "vnmls" || Mnemonic == "vqabs" || Mnemonic == "vrecps" ||
3128 Mnemonic == "vrsqrts" || Mnemonic == "srs" ||
3129 (Mnemonic == "movs" && isThumb()))) {
3130 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 1);
3131 CarrySetting = true;
3134 // The "cps" instruction can have a interrupt mode operand which is glued into
3135 // the mnemonic. Check if this is the case, split it and parse the imod op
3136 if (Mnemonic.startswith("cps")) {
3137 // Split out any imod code.
3139 StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2, 2))
3140 .Case("ie", ARM_PROC::IE)
3141 .Case("id", ARM_PROC::ID)
3144 Mnemonic = Mnemonic.slice(0, Mnemonic.size()-2);
3145 ProcessorIMod = IMod;
3149 // The "it" instruction has the condition mask on the end of the mnemonic.
3150 if (Mnemonic.startswith("it")) {
3151 ITMask = Mnemonic.slice(2, Mnemonic.size());
3152 Mnemonic = Mnemonic.slice(0, 2);
3158 /// \brief Given a canonical mnemonic, determine if the instruction ever allows
3159 /// inclusion of carry set or predication code operands.
3161 // FIXME: It would be nice to autogen this.
3163 getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
3164 bool &CanAcceptPredicationCode) {
3165 if (Mnemonic == "and" || Mnemonic == "lsl" || Mnemonic == "lsr" ||
3166 Mnemonic == "rrx" || Mnemonic == "ror" || Mnemonic == "sub" ||
3167 Mnemonic == "smull" || Mnemonic == "add" || Mnemonic == "adc" ||
3168 Mnemonic == "mul" || Mnemonic == "bic" || Mnemonic == "asr" ||
3169 Mnemonic == "umlal" || Mnemonic == "orr" || Mnemonic == "mvn" ||
3170 Mnemonic == "rsb" || Mnemonic == "rsc" || Mnemonic == "orn" ||
3171 Mnemonic == "sbc" || Mnemonic == "mla" || Mnemonic == "umull" ||
3172 Mnemonic == "eor" || Mnemonic == "smlal" || Mnemonic == "neg" ||
3173 (Mnemonic == "mov" && !isThumb())) {
3174 CanAcceptCarrySet = true;
3176 CanAcceptCarrySet = false;
3179 if (Mnemonic == "cbnz" || Mnemonic == "setend" || Mnemonic == "dmb" ||
3180 Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
3181 Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
3182 Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
3183 Mnemonic == "dsb" || Mnemonic == "isb" || Mnemonic == "setend" ||
3184 (Mnemonic == "clrex" && !isThumb()) ||
3185 (Mnemonic == "nop" && isThumbOne()) ||
3186 ((Mnemonic == "pld" || Mnemonic == "pli" || Mnemonic == "pldw") &&
3188 ((Mnemonic.startswith("rfe") || Mnemonic.startswith("srs")) &&
3190 Mnemonic.startswith("cps") || (Mnemonic == "movs" && isThumb())) {
3191 CanAcceptPredicationCode = false;
3193 CanAcceptPredicationCode = true;
3197 if (Mnemonic == "bkpt" || Mnemonic == "mcr" || Mnemonic == "mcrr" ||
3198 Mnemonic == "mrc" || Mnemonic == "mrrc" || Mnemonic == "cdp")
3199 CanAcceptPredicationCode = false;
3202 bool ARMAsmParser::shouldOmitCCOutOperand(StringRef Mnemonic,
3203 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3204 // FIXME: This is all horribly hacky. We really need a better way to deal
3205 // with optional operands like this in the matcher table.
3207 // The 'mov' mnemonic is special. One variant has a cc_out operand, while
3208 // another does not. Specifically, the MOVW instruction does not. So we
3209 // special case it here and remove the defaulted (non-setting) cc_out
3210 // operand if that's the instruction we're trying to match.
3212 // We do this as post-processing of the explicit operands rather than just
3213 // conditionally adding the cc_out in the first place because we need
3214 // to check the type of the parsed immediate operand.
3215 if (Mnemonic == "mov" && Operands.size() > 4 &&
3216 !static_cast<ARMOperand*>(Operands[4])->isARMSOImm() &&
3217 static_cast<ARMOperand*>(Operands[4])->isImm0_65535Expr() &&
3218 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
3221 // Register-register 'add' for thumb does not have a cc_out operand
3222 // when there are only two register operands.
3223 if (isThumb() && Mnemonic == "add" && Operands.size() == 5 &&
3224 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3225 static_cast<ARMOperand*>(Operands[4])->isReg() &&
3226 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
3228 // Register-register 'add' for thumb does not have a cc_out operand
3229 // when it's an ADD Rdm, SP, {Rdm|#imm0_255} instruction. We do
3230 // have to check the immediate range here since Thumb2 has a variant
3231 // that can handle a different range and has a cc_out operand.
3232 if (isThumb() && Mnemonic == "add" && Operands.size() == 6 &&
3233 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3234 static_cast<ARMOperand*>(Operands[4])->isReg() &&
3235 static_cast<ARMOperand*>(Operands[4])->getReg() == ARM::SP &&
3236 static_cast<ARMOperand*>(Operands[1])->getReg() == 0 &&
3237 (static_cast<ARMOperand*>(Operands[5])->isReg() ||
3238 static_cast<ARMOperand*>(Operands[5])->isImm0_1020s4()))
3240 // For Thumb2, add immediate does not have a cc_out operand for the
3241 // imm0_4096 variant. That's the least-preferred variant when
3242 // selecting via the generic "add" mnemonic, so to know that we
3243 // should remove the cc_out operand, we have to explicitly check that
3244 // it's not one of the other variants. Ugh.
3245 if (isThumbTwo() && Mnemonic == "add" && Operands.size() == 6 &&
3246 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3247 static_cast<ARMOperand*>(Operands[4])->isReg() &&
3248 static_cast<ARMOperand*>(Operands[5])->isImm()) {
3249 // Nest conditions rather than one big 'if' statement for readability.
3251 // If either register is a high reg, it's either one of the SP
3252 // variants (handled above) or a 32-bit encoding, so we just
3253 // check against T3.
3254 if ((!isARMLowRegister(static_cast<ARMOperand*>(Operands[3])->getReg()) ||
3255 !isARMLowRegister(static_cast<ARMOperand*>(Operands[4])->getReg())) &&
3256 static_cast<ARMOperand*>(Operands[5])->isT2SOImm())
3258 // If both registers are low, we're in an IT block, and the immediate is
3259 // in range, we should use encoding T1 instead, which has a cc_out.
3261 isARMLowRegister(static_cast<ARMOperand*>(Operands[4])->getReg()) &&
3262 isARMLowRegister(static_cast<ARMOperand*>(Operands[4])->getReg()) &&
3263 static_cast<ARMOperand*>(Operands[5])->isImm0_7())
3266 // Otherwise, we use encoding T4, which does not have a cc_out
3272 // Register-register 'add/sub' for thumb does not have a cc_out operand
3273 // when it's an ADD/SUB SP, #imm. Be lenient on count since there's also
3274 // the "add/sub SP, SP, #imm" version. If the follow-up operands aren't
3275 // right, this will result in better diagnostics (which operand is off)
3277 if (isThumb() && (Mnemonic == "add" || Mnemonic == "sub") &&
3278 (Operands.size() == 5 || Operands.size() == 6) &&
3279 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3280 static_cast<ARMOperand*>(Operands[3])->getReg() == ARM::SP &&
3281 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
3287 /// Parse an arm instruction mnemonic followed by its operands.
3288 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
3289 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3290 // Create the leading tokens for the mnemonic, split by '.' characters.
3291 size_t Start = 0, Next = Name.find('.');
3292 StringRef Mnemonic = Name.slice(Start, Next);
3294 // Split out the predication code and carry setting flag from the mnemonic.
3295 unsigned PredicationCode;
3296 unsigned ProcessorIMod;
3299 Mnemonic = splitMnemonic(Mnemonic, PredicationCode, CarrySetting,
3300 ProcessorIMod, ITMask);
3302 // In Thumb1, only the branch (B) instruction can be predicated.
3303 if (isThumbOne() && PredicationCode != ARMCC::AL && Mnemonic != "b") {
3304 Parser.EatToEndOfStatement();
3305 return Error(NameLoc, "conditional execution not supported in Thumb1");
3308 Operands.push_back(ARMOperand::CreateToken(Mnemonic, NameLoc));
3310 // Handle the IT instruction ITMask. Convert it to a bitmask. This
3311 // is the mask as it will be for the IT encoding if the conditional
3312 // encoding has a '1' as it's bit0 (i.e. 't' ==> '1'). In the case
3313 // where the conditional bit0 is zero, the instruction post-processing
3314 // will adjust the mask accordingly.
3315 if (Mnemonic == "it") {
3316 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + 2);
3317 if (ITMask.size() > 3) {
3318 Parser.EatToEndOfStatement();
3319 return Error(Loc, "too many conditions on IT instruction");
3322 for (unsigned i = ITMask.size(); i != 0; --i) {
3323 char pos = ITMask[i - 1];
3324 if (pos != 't' && pos != 'e') {
3325 Parser.EatToEndOfStatement();
3326 return Error(Loc, "illegal IT block condition mask '" + ITMask + "'");
3329 if (ITMask[i - 1] == 't')
3332 Operands.push_back(ARMOperand::CreateITMask(Mask, Loc));
3335 // FIXME: This is all a pretty gross hack. We should automatically handle
3336 // optional operands like this via tblgen.
3338 // Next, add the CCOut and ConditionCode operands, if needed.
3340 // For mnemonics which can ever incorporate a carry setting bit or predication
3341 // code, our matching model involves us always generating CCOut and
3342 // ConditionCode operands to match the mnemonic "as written" and then we let
3343 // the matcher deal with finding the right instruction or generating an
3344 // appropriate error.
3345 bool CanAcceptCarrySet, CanAcceptPredicationCode;
3346 getMnemonicAcceptInfo(Mnemonic, CanAcceptCarrySet, CanAcceptPredicationCode);
3348 // If we had a carry-set on an instruction that can't do that, issue an
3350 if (!CanAcceptCarrySet && CarrySetting) {
3351 Parser.EatToEndOfStatement();
3352 return Error(NameLoc, "instruction '" + Mnemonic +
3353 "' can not set flags, but 's' suffix specified");
3355 // If we had a predication code on an instruction that can't do that, issue an
3357 if (!CanAcceptPredicationCode && PredicationCode != ARMCC::AL) {
3358 Parser.EatToEndOfStatement();
3359 return Error(NameLoc, "instruction '" + Mnemonic +
3360 "' is not predicable, but condition code specified");
3363 // Add the carry setting operand, if necessary.
3364 if (CanAcceptCarrySet) {
3365 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + Mnemonic.size());
3366 Operands.push_back(ARMOperand::CreateCCOut(CarrySetting ? ARM::CPSR : 0,
3370 // Add the predication code operand, if necessary.
3371 if (CanAcceptPredicationCode) {
3372 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + Mnemonic.size() +
3374 Operands.push_back(ARMOperand::CreateCondCode(
3375 ARMCC::CondCodes(PredicationCode), Loc));
3378 // Add the processor imod operand, if necessary.
3379 if (ProcessorIMod) {
3380 Operands.push_back(ARMOperand::CreateImm(
3381 MCConstantExpr::Create(ProcessorIMod, getContext()),
3385 // Add the remaining tokens in the mnemonic.
3386 while (Next != StringRef::npos) {
3388 Next = Name.find('.', Start + 1);
3389 StringRef ExtraToken = Name.slice(Start, Next);
3391 // For now, we're only parsing Thumb1 (for the most part), so
3392 // just ignore ".n" qualifiers. We'll use them to restrict
3393 // matching when we do Thumb2.
3394 if (ExtraToken != ".n") {
3395 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + Start);
3396 Operands.push_back(ARMOperand::CreateToken(ExtraToken, Loc));
3400 // Read the remaining operands.
3401 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3402 // Read the first operand.
3403 if (parseOperand(Operands, Mnemonic)) {
3404 Parser.EatToEndOfStatement();
3408 while (getLexer().is(AsmToken::Comma)) {
3409 Parser.Lex(); // Eat the comma.
3411 // Parse and remember the operand.
3412 if (parseOperand(Operands, Mnemonic)) {
3413 Parser.EatToEndOfStatement();
3419 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3420 Parser.EatToEndOfStatement();
3421 return TokError("unexpected token in argument list");
3424 Parser.Lex(); // Consume the EndOfStatement
3426 // Some instructions, mostly Thumb, have forms for the same mnemonic that
3427 // do and don't have a cc_out optional-def operand. With some spot-checks
3428 // of the operand list, we can figure out which variant we're trying to
3429 // parse and adjust accordingly before actually matching. We shouldn't ever
3430 // try to remove a cc_out operand that was explicitly set on the the
3431 // mnemonic, of course (CarrySetting == true). Reason number #317 the
3432 // table driven matcher doesn't fit well with the ARM instruction set.
3433 if (!CarrySetting && shouldOmitCCOutOperand(Mnemonic, Operands)) {
3434 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
3435 Operands.erase(Operands.begin() + 1);
3439 // ARM mode 'blx' need special handling, as the register operand version
3440 // is predicable, but the label operand version is not. So, we can't rely
3441 // on the Mnemonic based checking to correctly figure out when to put
3442 // a CondCode operand in the list. If we're trying to match the label
3443 // version, remove the CondCode operand here.
3444 if (!isThumb() && Mnemonic == "blx" && Operands.size() == 3 &&
3445 static_cast<ARMOperand*>(Operands[2])->isImm()) {
3446 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
3447 Operands.erase(Operands.begin() + 1);
3451 // The vector-compare-to-zero instructions have a literal token "#0" at
3452 // the end that comes to here as an immediate operand. Convert it to a
3453 // token to play nicely with the matcher.
3454 if ((Mnemonic == "vceq" || Mnemonic == "vcge" || Mnemonic == "vcgt" ||
3455 Mnemonic == "vcle" || Mnemonic == "vclt") && Operands.size() == 6 &&
3456 static_cast<ARMOperand*>(Operands[5])->isImm()) {
3457 ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
3458 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
3459 if (CE && CE->getValue() == 0) {
3460 Operands.erase(Operands.begin() + 5);
3461 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
3465 // Similarly, the Thumb1 "RSB" instruction has a literal "#0" on the
3466 // end. Convert it to a token here.
3467 if (Mnemonic == "rsb" && isThumb() && Operands.size() == 6 &&
3468 static_cast<ARMOperand*>(Operands[5])->isImm()) {
3469 ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
3470 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
3471 if (CE && CE->getValue() == 0) {
3472 Operands.erase(Operands.begin() + 5);
3473 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
3481 // Validate context-sensitive operand constraints.
3483 // return 'true' if register list contains non-low GPR registers,
3484 // 'false' otherwise. If Reg is in the register list or is HiReg, set
3485 // 'containsReg' to true.
3486 static bool checkLowRegisterList(MCInst Inst, unsigned OpNo, unsigned Reg,
3487 unsigned HiReg, bool &containsReg) {
3488 containsReg = false;
3489 for (unsigned i = OpNo; i < Inst.getNumOperands(); ++i) {
3490 unsigned OpReg = Inst.getOperand(i).getReg();
3493 // Anything other than a low register isn't legal here.
3494 if (!isARMLowRegister(OpReg) && (!HiReg || OpReg != HiReg))
3500 // Check if the specified regisgter is in the register list of the inst,
3501 // starting at the indicated operand number.
3502 static bool listContainsReg(MCInst &Inst, unsigned OpNo, unsigned Reg) {
3503 for (unsigned i = OpNo; i < Inst.getNumOperands(); ++i) {
3504 unsigned OpReg = Inst.getOperand(i).getReg();
3511 // FIXME: We would really prefer to have MCInstrInfo (the wrapper around
3512 // the ARMInsts array) instead. Getting that here requires awkward
3513 // API changes, though. Better way?
3515 extern MCInstrDesc ARMInsts[];
3517 static MCInstrDesc &getInstDesc(unsigned Opcode) {
3518 return ARMInsts[Opcode];
3521 // FIXME: We would really like to be able to tablegen'erate this.
3523 validateInstruction(MCInst &Inst,
3524 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3525 MCInstrDesc &MCID = getInstDesc(Inst.getOpcode());
3526 SMLoc Loc = Operands[0]->getStartLoc();
3527 // Check the IT block state first.
3530 if (ITState.FirstCond)
3531 ITState.FirstCond = false;
3533 bit = (ITState.Mask >> (5 - ITState.CurPosition)) & 1;
3534 // The instruction must be predicable.
3535 if (!MCID.isPredicable())
3536 return Error(Loc, "instructions in IT block must be predicable");
3537 unsigned Cond = Inst.getOperand(MCID.findFirstPredOperandIdx()).getImm();
3538 unsigned ITCond = bit ? ITState.Cond :
3539 ARMCC::getOppositeCondition(ITState.Cond);
3540 if (Cond != ITCond) {
3541 // Find the condition code Operand to get its SMLoc information.
3543 for (unsigned i = 1; i < Operands.size(); ++i)
3544 if (static_cast<ARMOperand*>(Operands[i])->isCondCode())
3545 CondLoc = Operands[i]->getStartLoc();
3546 return Error(CondLoc, "incorrect condition in IT block; got '" +
3547 StringRef(ARMCondCodeToString(ARMCC::CondCodes(Cond))) +
3548 "', but expected '" +
3549 ARMCondCodeToString(ARMCC::CondCodes(ITCond)) + "'");
3551 // Check for non-'al' condition codes outside of the IT block.
3552 } else if (isThumbTwo() && MCID.isPredicable() &&
3553 Inst.getOperand(MCID.findFirstPredOperandIdx()).getImm() !=
3554 ARMCC::AL && Inst.getOpcode() != ARM::tBcc &&
3555 Inst.getOpcode() != ARM::t2Bcc)
3556 return Error(Loc, "predicated instructions must be in IT block");
3558 switch (Inst.getOpcode()) {
3561 case ARM::LDRD_POST:
3563 // Rt2 must be Rt + 1.
3564 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
3565 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3567 return Error(Operands[3]->getStartLoc(),
3568 "destination operands must be sequential");
3572 // Rt2 must be Rt + 1.
3573 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
3574 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3576 return Error(Operands[3]->getStartLoc(),
3577 "source operands must be sequential");
3581 case ARM::STRD_POST:
3583 // Rt2 must be Rt + 1.
3584 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3585 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(2).getReg());
3587 return Error(Operands[3]->getStartLoc(),
3588 "source operands must be sequential");
3593 // width must be in range [1, 32-lsb]
3594 unsigned lsb = Inst.getOperand(2).getImm();
3595 unsigned widthm1 = Inst.getOperand(3).getImm();
3596 if (widthm1 >= 32 - lsb)
3597 return Error(Operands[5]->getStartLoc(),
3598 "bitfield width must be in range [1,32-lsb]");
3602 // If we're parsing Thumb2, the .w variant is available and handles
3603 // most cases that are normally illegal for a Thumb1 LDM
3604 // instruction. We'll make the transformation in processInstruction()
3607 // Thumb LDM instructions are writeback iff the base register is not
3608 // in the register list.
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) && !isThumbTwo())
3615 return Error(Operands[3 + hasWritebackToken]->getStartLoc(),
3616 "registers must be in range r0-r7");
3617 // If we should have writeback, then there should be a '!' token.
3618 if (!listContainsBase && !hasWritebackToken && !isThumbTwo())
3619 return Error(Operands[2]->getStartLoc(),
3620 "writeback operator '!' expected");
3621 // If we should not have writeback, there must not be a '!'. This is
3622 // true even for the 32-bit wide encodings.
3623 if (listContainsBase && hasWritebackToken)
3624 return Error(Operands[3]->getStartLoc(),
3625 "writeback operator '!' not allowed when base register "
3626 "in register list");
3630 case ARM::t2LDMIA_UPD: {
3631 if (listContainsReg(Inst, 3, Inst.getOperand(0).getReg()))
3632 return Error(Operands[4]->getStartLoc(),
3633 "writeback operator '!' not allowed when base register "
3634 "in register list");
3638 bool listContainsBase;
3639 if (checkLowRegisterList(Inst, 3, 0, ARM::PC, listContainsBase))
3640 return Error(Operands[2]->getStartLoc(),
3641 "registers must be in range r0-r7 or pc");
3645 bool listContainsBase;
3646 if (checkLowRegisterList(Inst, 3, 0, ARM::LR, listContainsBase))
3647 return Error(Operands[2]->getStartLoc(),
3648 "registers must be in range r0-r7 or lr");
3651 case ARM::tSTMIA_UPD: {
3652 bool listContainsBase;
3653 if (checkLowRegisterList(Inst, 4, 0, 0, listContainsBase))
3654 return Error(Operands[4]->getStartLoc(),
3655 "registers must be in range r0-r7");
3664 processInstruction(MCInst &Inst,
3665 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3666 switch (Inst.getOpcode()) {
3667 case ARM::LDMIA_UPD:
3668 // If this is a load of a single register via a 'pop', then we should use
3669 // a post-indexed LDR instruction instead, per the ARM ARM.
3670 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "pop" &&
3671 Inst.getNumOperands() == 5) {
3673 TmpInst.setOpcode(ARM::LDR_POST_IMM);
3674 TmpInst.addOperand(Inst.getOperand(4)); // Rt
3675 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
3676 TmpInst.addOperand(Inst.getOperand(1)); // Rn
3677 TmpInst.addOperand(MCOperand::CreateReg(0)); // am2offset
3678 TmpInst.addOperand(MCOperand::CreateImm(4));
3679 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
3680 TmpInst.addOperand(Inst.getOperand(3));
3684 case ARM::STMDB_UPD:
3685 // If this is a store of a single register via a 'push', then we should use
3686 // a pre-indexed STR instruction instead, per the ARM ARM.
3687 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "push" &&
3688 Inst.getNumOperands() == 5) {
3690 TmpInst.setOpcode(ARM::STR_PRE_IMM);
3691 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
3692 TmpInst.addOperand(Inst.getOperand(4)); // Rt
3693 TmpInst.addOperand(Inst.getOperand(1)); // addrmode_imm12
3694 TmpInst.addOperand(MCOperand::CreateImm(-4));
3695 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
3696 TmpInst.addOperand(Inst.getOperand(3));
3701 // If the immediate is in the range 0-7, we want tADDi3 iff Rd was
3702 // explicitly specified. From the ARM ARM: "Encoding T1 is preferred
3703 // to encoding T2 if <Rd> is specified and encoding T2 is preferred
3704 // to encoding T1 if <Rd> is omitted."
3705 if (Inst.getOperand(3).getImm() < 8 && Operands.size() == 6)
3706 Inst.setOpcode(ARM::tADDi3);
3709 // If the conditional is AL or we're in an IT block, we really want t2B.
3710 if (Inst.getOperand(1).getImm() == ARMCC::AL || inITBlock())
3711 Inst.setOpcode(ARM::t2B);
3714 // If the conditional is AL, we really want tB.
3715 if (Inst.getOperand(1).getImm() == ARMCC::AL)
3716 Inst.setOpcode(ARM::tB);
3719 // If the register list contains any high registers, or if the writeback
3720 // doesn't match what tLDMIA can do, we need to use the 32-bit encoding
3721 // instead if we're in Thumb2. Otherwise, this should have generated
3722 // an error in validateInstruction().
3723 unsigned Rn = Inst.getOperand(0).getReg();
3724 bool hasWritebackToken =
3725 (static_cast<ARMOperand*>(Operands[3])->isToken() &&
3726 static_cast<ARMOperand*>(Operands[3])->getToken() == "!");
3727 bool listContainsBase;
3728 if (checkLowRegisterList(Inst, 3, Rn, 0, listContainsBase) ||
3729 (!listContainsBase && !hasWritebackToken) ||
3730 (listContainsBase && hasWritebackToken)) {
3731 // 16-bit encoding isn't sufficient. Switch to the 32-bit version.
3732 assert (isThumbTwo());
3733 Inst.setOpcode(hasWritebackToken ? ARM::t2LDMIA_UPD : ARM::t2LDMIA);
3734 // If we're switching to the updating version, we need to insert
3735 // the writeback tied operand.
3736 if (hasWritebackToken)
3737 Inst.insert(Inst.begin(),
3738 MCOperand::CreateReg(Inst.getOperand(0).getReg()));
3743 // The mask bits for all but the first condition are represented as
3744 // the low bit of the condition code value implies 't'. We currently
3745 // always have 1 implies 't', so XOR toggle the bits if the low bit
3746 // of the condition code is zero. The encoding also expects the low
3747 // bit of the condition to be encoded as bit 4 of the mask operand,
3748 // so mask that in if needed
3749 MCOperand &MO = Inst.getOperand(1);
3750 unsigned Mask = MO.getImm();
3751 unsigned OrigMask = Mask;
3752 unsigned TZ = CountTrailingZeros_32(Mask);
3753 if ((Inst.getOperand(0).getImm() & 1) == 0) {
3754 assert(Mask && TZ <= 3 && "illegal IT mask value!");
3755 for (unsigned i = 3; i != TZ; --i)
3761 // Set up the IT block state according to the IT instruction we just
3763 assert(!inITBlock() && "nested IT blocks?!");
3764 ITState.Cond = ARMCC::CondCodes(Inst.getOperand(0).getImm());
3765 ITState.Mask = OrigMask; // Use the original mask, not the updated one.
3766 ITState.CurPosition = 0;
3767 ITState.FirstCond = true;
3773 unsigned ARMAsmParser::checkTargetMatchPredicate(MCInst &Inst) {
3774 // 16-bit thumb arithmetic instructions either require or preclude the 'S'
3775 // suffix depending on whether they're in an IT block or not.
3776 unsigned Opc = Inst.getOpcode();
3777 MCInstrDesc &MCID = getInstDesc(Opc);
3778 if (MCID.TSFlags & ARMII::ThumbArithFlagSetting) {
3779 assert(MCID.hasOptionalDef() &&
3780 "optionally flag setting instruction missing optional def operand");
3781 assert(MCID.NumOperands == Inst.getNumOperands() &&
3782 "operand count mismatch!");
3783 // Find the optional-def operand (cc_out).
3786 !MCID.OpInfo[OpNo].isOptionalDef() && OpNo < MCID.NumOperands;
3789 // If we're parsing Thumb1, reject it completely.
3790 if (isThumbOne() && Inst.getOperand(OpNo).getReg() != ARM::CPSR)
3791 return Match_MnemonicFail;
3792 // If we're parsing Thumb2, which form is legal depends on whether we're
3794 if (isThumbTwo() && Inst.getOperand(OpNo).getReg() != ARM::CPSR &&
3796 return Match_RequiresITBlock;
3797 if (isThumbTwo() && Inst.getOperand(OpNo).getReg() == ARM::CPSR &&
3799 return Match_RequiresNotITBlock;
3801 // Some high-register supporting Thumb1 encodings only allow both registers
3802 // to be from r0-r7 when in Thumb2.
3803 else if (Opc == ARM::tADDhirr && isThumbOne() &&
3804 isARMLowRegister(Inst.getOperand(1).getReg()) &&
3805 isARMLowRegister(Inst.getOperand(2).getReg()))
3806 return Match_RequiresThumb2;
3807 // Others only require ARMv6 or later.
3808 else if (Opc == ARM::tMOVr && isThumbOne() && !hasV6Ops() &&
3809 isARMLowRegister(Inst.getOperand(0).getReg()) &&
3810 isARMLowRegister(Inst.getOperand(1).getReg()))
3811 return Match_RequiresV6;
3812 return Match_Success;
3816 MatchAndEmitInstruction(SMLoc IDLoc,
3817 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
3821 unsigned MatchResult;
3822 MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo);
3823 switch (MatchResult) {
3826 // Context sensitive operand constraints aren't handled by the matcher,
3827 // so check them here.
3828 if (validateInstruction(Inst, Operands)) {
3829 // Still progress the IT block, otherwise one wrong condition causes
3830 // nasty cascading errors.
3831 forwardITPosition();
3835 // Some instructions need post-processing to, for example, tweak which
3836 // encoding is selected.
3837 processInstruction(Inst, Operands);
3839 // Only move forward at the very end so that everything in validate
3840 // and process gets a consistent answer about whether we're in an IT
3842 forwardITPosition();
3844 Out.EmitInstruction(Inst);
3846 case Match_MissingFeature:
3847 Error(IDLoc, "instruction requires a CPU feature not currently enabled");
3849 case Match_InvalidOperand: {
3850 SMLoc ErrorLoc = IDLoc;
3851 if (ErrorInfo != ~0U) {
3852 if (ErrorInfo >= Operands.size())
3853 return Error(IDLoc, "too few operands for instruction");
3855 ErrorLoc = ((ARMOperand*)Operands[ErrorInfo])->getStartLoc();
3856 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
3859 return Error(ErrorLoc, "invalid operand for instruction");
3861 case Match_MnemonicFail:
3862 return Error(IDLoc, "invalid instruction");
3863 case Match_ConversionFail:
3864 // The converter function will have already emited a diagnostic.
3866 case Match_RequiresNotITBlock:
3867 return Error(IDLoc, "flag setting instruction only valid outside IT block");
3868 case Match_RequiresITBlock:
3869 return Error(IDLoc, "instruction only valid inside IT block");
3870 case Match_RequiresV6:
3871 return Error(IDLoc, "instruction variant requires ARMv6 or later");
3872 case Match_RequiresThumb2:
3873 return Error(IDLoc, "instruction variant requires Thumb2");
3876 llvm_unreachable("Implement any new match types added!");
3880 /// parseDirective parses the arm specific directives
3881 bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
3882 StringRef IDVal = DirectiveID.getIdentifier();
3883 if (IDVal == ".word")
3884 return parseDirectiveWord(4, DirectiveID.getLoc());
3885 else if (IDVal == ".thumb")
3886 return parseDirectiveThumb(DirectiveID.getLoc());
3887 else if (IDVal == ".thumb_func")
3888 return parseDirectiveThumbFunc(DirectiveID.getLoc());
3889 else if (IDVal == ".code")
3890 return parseDirectiveCode(DirectiveID.getLoc());
3891 else if (IDVal == ".syntax")
3892 return parseDirectiveSyntax(DirectiveID.getLoc());
3896 /// parseDirectiveWord
3897 /// ::= .word [ expression (, expression)* ]
3898 bool ARMAsmParser::parseDirectiveWord(unsigned Size, SMLoc L) {
3899 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3901 const MCExpr *Value;
3902 if (getParser().ParseExpression(Value))
3905 getParser().getStreamer().EmitValue(Value, Size, 0/*addrspace*/);
3907 if (getLexer().is(AsmToken::EndOfStatement))
3910 // FIXME: Improve diagnostic.
3911 if (getLexer().isNot(AsmToken::Comma))
3912 return Error(L, "unexpected token in directive");
3921 /// parseDirectiveThumb
3923 bool ARMAsmParser::parseDirectiveThumb(SMLoc L) {
3924 if (getLexer().isNot(AsmToken::EndOfStatement))
3925 return Error(L, "unexpected token in directive");
3928 // TODO: set thumb mode
3929 // TODO: tell the MC streamer the mode
3930 // getParser().getStreamer().Emit???();
3934 /// parseDirectiveThumbFunc
3935 /// ::= .thumbfunc symbol_name
3936 bool ARMAsmParser::parseDirectiveThumbFunc(SMLoc L) {
3937 const MCAsmInfo &MAI = getParser().getStreamer().getContext().getAsmInfo();
3938 bool isMachO = MAI.hasSubsectionsViaSymbols();
3941 // Darwin asm has function name after .thumb_func direction
3944 const AsmToken &Tok = Parser.getTok();
3945 if (Tok.isNot(AsmToken::Identifier) && Tok.isNot(AsmToken::String))
3946 return Error(L, "unexpected token in .thumb_func directive");
3947 Name = Tok.getString();
3948 Parser.Lex(); // Consume the identifier token.
3951 if (getLexer().isNot(AsmToken::EndOfStatement))
3952 return Error(L, "unexpected token in directive");
3955 // FIXME: assuming function name will be the line following .thumb_func
3957 Name = Parser.getTok().getString();
3960 // Mark symbol as a thumb symbol.
3961 MCSymbol *Func = getParser().getContext().GetOrCreateSymbol(Name);
3962 getParser().getStreamer().EmitThumbFunc(Func);
3966 /// parseDirectiveSyntax
3967 /// ::= .syntax unified | divided
3968 bool ARMAsmParser::parseDirectiveSyntax(SMLoc L) {
3969 const AsmToken &Tok = Parser.getTok();
3970 if (Tok.isNot(AsmToken::Identifier))
3971 return Error(L, "unexpected token in .syntax directive");
3972 StringRef Mode = Tok.getString();
3973 if (Mode == "unified" || Mode == "UNIFIED")
3975 else if (Mode == "divided" || Mode == "DIVIDED")
3976 return Error(L, "'.syntax divided' arm asssembly not supported");
3978 return Error(L, "unrecognized syntax mode in .syntax directive");
3980 if (getLexer().isNot(AsmToken::EndOfStatement))
3981 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
3984 // TODO tell the MC streamer the mode
3985 // getParser().getStreamer().Emit???();
3989 /// parseDirectiveCode
3990 /// ::= .code 16 | 32
3991 bool ARMAsmParser::parseDirectiveCode(SMLoc L) {
3992 const AsmToken &Tok = Parser.getTok();
3993 if (Tok.isNot(AsmToken::Integer))
3994 return Error(L, "unexpected token in .code directive");
3995 int64_t Val = Parser.getTok().getIntVal();
4001 return Error(L, "invalid operand to .code directive");
4003 if (getLexer().isNot(AsmToken::EndOfStatement))
4004 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
4010 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code16);
4014 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code32);
4020 extern "C" void LLVMInitializeARMAsmLexer();
4022 /// Force static initialization.
4023 extern "C" void LLVMInitializeARMAsmParser() {
4024 RegisterMCAsmParser<ARMAsmParser> X(TheARMTarget);
4025 RegisterMCAsmParser<ARMAsmParser> Y(TheThumbTarget);
4026 LLVMInitializeARMAsmLexer();
4029 #define GET_REGISTER_MATCHER
4030 #define GET_MATCHER_IMPLEMENTATION
4031 #include "ARMGenAsmMatcher.inc"