1 //===-- ARMInstPrinter.cpp - Convert ARM MCInst to assembly syntax --------===//
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 // This class prints an ARM MCInst to a .s file.
12 //===----------------------------------------------------------------------===//
14 #include "ARMInstPrinter.h"
15 #include "MCTargetDesc/ARMAddressingModes.h"
16 #include "MCTargetDesc/ARMBaseInfo.h"
17 #include "llvm/MC/MCAsmInfo.h"
18 #include "llvm/MC/MCExpr.h"
19 #include "llvm/MC/MCInst.h"
20 #include "llvm/MC/MCInstrInfo.h"
21 #include "llvm/MC/MCRegisterInfo.h"
22 #include "llvm/Support/raw_ostream.h"
25 #define DEBUG_TYPE "asm-printer"
27 #include "ARMGenAsmWriter.inc"
29 /// translateShiftImm - Convert shift immediate from 0-31 to 1-32 for printing.
31 /// getSORegOffset returns an integer from 0-31, representing '32' as 0.
32 static unsigned translateShiftImm(unsigned imm) {
33 // lsr #32 and asr #32 exist, but should be encoded as a 0.
34 assert((imm & ~0x1f) == 0 && "Invalid shift encoding");
41 /// Prints the shift value with an immediate value.
42 static void printRegImmShift(raw_ostream &O, ARM_AM::ShiftOpc ShOpc,
43 unsigned ShImm, bool UseMarkup) {
44 if (ShOpc == ARM_AM::no_shift || (ShOpc == ARM_AM::lsl && !ShImm))
48 assert (!(ShOpc == ARM_AM::ror && !ShImm) && "Cannot have ror #0");
49 O << getShiftOpcStr(ShOpc);
51 if (ShOpc != ARM_AM::rrx) {
55 O << "#" << translateShiftImm(ShImm);
61 ARMInstPrinter::ARMInstPrinter(const MCAsmInfo &MAI,
62 const MCInstrInfo &MII,
63 const MCRegisterInfo &MRI,
64 const MCSubtargetInfo &STI) :
65 MCInstPrinter(MAI, MII, MRI) {
66 // Initialize the set of available features.
67 setAvailableFeatures(STI.getFeatureBits());
70 void ARMInstPrinter::printRegName(raw_ostream &OS, unsigned RegNo) const {
72 << getRegisterName(RegNo)
76 void ARMInstPrinter::printInst(const MCInst *MI, raw_ostream &O,
78 unsigned Opcode = MI->getOpcode();
82 // Check for HINT instructions w/ canonical names.
86 switch (MI->getOperand(0).getImm()) {
87 case 0: O << "\tnop"; break;
88 case 1: O << "\tyield"; break;
89 case 2: O << "\twfe"; break;
90 case 3: O << "\twfi"; break;
91 case 4: O << "\tsev"; break;
93 if ((getAvailableFeatures() & ARM::HasV8Ops)) {
96 } // Fallthrough for non-v8
98 // Anything else should just print normally.
99 printInstruction(MI, O);
100 printAnnotation(O, Annot);
103 printPredicateOperand(MI, 1, O);
104 if (Opcode == ARM::t2HINT)
106 printAnnotation(O, Annot);
109 // Check for MOVs and print canonical forms, instead.
111 // FIXME: Thumb variants?
112 const MCOperand &Dst = MI->getOperand(0);
113 const MCOperand &MO1 = MI->getOperand(1);
114 const MCOperand &MO2 = MI->getOperand(2);
115 const MCOperand &MO3 = MI->getOperand(3);
117 O << '\t' << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(MO3.getImm()));
118 printSBitModifierOperand(MI, 6, O);
119 printPredicateOperand(MI, 4, O);
122 printRegName(O, Dst.getReg());
124 printRegName(O, MO1.getReg());
127 printRegName(O, MO2.getReg());
128 assert(ARM_AM::getSORegOffset(MO3.getImm()) == 0);
129 printAnnotation(O, Annot);
134 // FIXME: Thumb variants?
135 const MCOperand &Dst = MI->getOperand(0);
136 const MCOperand &MO1 = MI->getOperand(1);
137 const MCOperand &MO2 = MI->getOperand(2);
139 O << '\t' << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(MO2.getImm()));
140 printSBitModifierOperand(MI, 5, O);
141 printPredicateOperand(MI, 3, O);
144 printRegName(O, Dst.getReg());
146 printRegName(O, MO1.getReg());
148 if (ARM_AM::getSORegShOp(MO2.getImm()) == ARM_AM::rrx) {
149 printAnnotation(O, Annot);
155 << "#" << translateShiftImm(ARM_AM::getSORegOffset(MO2.getImm()))
157 printAnnotation(O, Annot);
163 case ARM::t2STMDB_UPD:
164 if (MI->getOperand(0).getReg() == ARM::SP && MI->getNumOperands() > 5) {
165 // Should only print PUSH if there are at least two registers in the list.
167 printPredicateOperand(MI, 2, O);
168 if (Opcode == ARM::t2STMDB_UPD)
171 printRegisterList(MI, 4, O);
172 printAnnotation(O, Annot);
177 case ARM::STR_PRE_IMM:
178 if (MI->getOperand(2).getReg() == ARM::SP &&
179 MI->getOperand(3).getImm() == -4) {
181 printPredicateOperand(MI, 4, O);
183 printRegName(O, MI->getOperand(1).getReg());
185 printAnnotation(O, Annot);
192 case ARM::t2LDMIA_UPD:
193 if (MI->getOperand(0).getReg() == ARM::SP && MI->getNumOperands() > 5) {
194 // Should only print POP if there are at least two registers in the list.
196 printPredicateOperand(MI, 2, O);
197 if (Opcode == ARM::t2LDMIA_UPD)
200 printRegisterList(MI, 4, O);
201 printAnnotation(O, Annot);
206 case ARM::LDR_POST_IMM:
207 if (MI->getOperand(2).getReg() == ARM::SP &&
208 MI->getOperand(4).getImm() == 4) {
210 printPredicateOperand(MI, 5, O);
212 printRegName(O, MI->getOperand(0).getReg());
214 printAnnotation(O, Annot);
220 case ARM::VSTMSDB_UPD:
221 case ARM::VSTMDDB_UPD:
222 if (MI->getOperand(0).getReg() == ARM::SP) {
223 O << '\t' << "vpush";
224 printPredicateOperand(MI, 2, O);
226 printRegisterList(MI, 4, O);
227 printAnnotation(O, Annot);
233 case ARM::VLDMSIA_UPD:
234 case ARM::VLDMDIA_UPD:
235 if (MI->getOperand(0).getReg() == ARM::SP) {
237 printPredicateOperand(MI, 2, O);
239 printRegisterList(MI, 4, O);
240 printAnnotation(O, Annot);
246 bool Writeback = true;
247 unsigned BaseReg = MI->getOperand(0).getReg();
248 for (unsigned i = 3; i < MI->getNumOperands(); ++i) {
249 if (MI->getOperand(i).getReg() == BaseReg)
255 printPredicateOperand(MI, 1, O);
257 printRegName(O, BaseReg);
258 if (Writeback) O << "!";
260 printRegisterList(MI, 3, O);
261 printAnnotation(O, Annot);
265 // Combine 2 GPRs from disassember into a GPRPair to match with instr def.
266 // ldrexd/strexd require even/odd GPR pair. To enforce this constraint,
267 // a single GPRPair reg operand is used in the .td file to replace the two
268 // GPRs. However, when decoding them, the two GRPs cannot be automatically
269 // expressed as a GPRPair, so we have to manually merge them.
270 // FIXME: We would really like to be able to tablegen'erate this.
271 case ARM::LDREXD: case ARM::STREXD:
272 case ARM::LDAEXD: case ARM::STLEXD: {
273 const MCRegisterClass& MRC = MRI.getRegClass(ARM::GPRRegClassID);
274 bool isStore = Opcode == ARM::STREXD || Opcode == ARM::STLEXD;
275 unsigned Reg = MI->getOperand(isStore ? 1 : 0).getReg();
276 if (MRC.contains(Reg)) {
279 NewMI.setOpcode(Opcode);
282 NewMI.addOperand(MI->getOperand(0));
283 NewReg = MCOperand::CreateReg(MRI.getMatchingSuperReg(Reg, ARM::gsub_0,
284 &MRI.getRegClass(ARM::GPRPairRegClassID)));
285 NewMI.addOperand(NewReg);
287 // Copy the rest operands into NewMI.
288 for(unsigned i= isStore ? 3 : 2; i < MI->getNumOperands(); ++i)
289 NewMI.addOperand(MI->getOperand(i));
290 printInstruction(&NewMI, O);
297 printInstruction(MI, O);
298 printAnnotation(O, Annot);
301 void ARMInstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
303 const MCOperand &Op = MI->getOperand(OpNo);
305 unsigned Reg = Op.getReg();
306 printRegName(O, Reg);
307 } else if (Op.isImm()) {
309 << '#' << formatImm(Op.getImm())
312 assert(Op.isExpr() && "unknown operand kind in printOperand");
313 const MCExpr *Expr = Op.getExpr();
314 switch (Expr->getKind()) {
318 case MCExpr::Constant: {
319 // If a symbolic branch target was added as a constant expression then
320 // print that address in hex. And only print 32 unsigned bits for the
322 const MCConstantExpr *Constant = cast<MCConstantExpr>(Expr);
323 int64_t TargetAddress;
324 if (!Constant->EvaluateAsAbsolute(TargetAddress)) {
328 O.write_hex(static_cast<uint32_t>(TargetAddress));
333 // FIXME: Should we always treat this as if it is a constant literal and
334 // prefix it with '#'?
341 void ARMInstPrinter::printThumbLdrLabelOperand(const MCInst *MI, unsigned OpNum,
343 const MCOperand &MO1 = MI->getOperand(OpNum);
349 O << markup("<mem:") << "[pc, ";
351 int32_t OffImm = (int32_t)MO1.getImm();
352 bool isSub = OffImm < 0;
354 // Special value for #-0. All others are normal.
355 if (OffImm == INT32_MIN)
359 << "#-" << formatImm(-OffImm)
363 << "#" << formatImm(OffImm)
366 O << "]" << markup(">");
369 // so_reg is a 4-operand unit corresponding to register forms of the A5.1
370 // "Addressing Mode 1 - Data-processing operands" forms. This includes:
372 // REG REG 0,SH_OPC - e.g. R5, ROR R3
373 // REG 0 IMM,SH_OPC - e.g. R5, LSL #3
374 void ARMInstPrinter::printSORegRegOperand(const MCInst *MI, unsigned OpNum,
376 const MCOperand &MO1 = MI->getOperand(OpNum);
377 const MCOperand &MO2 = MI->getOperand(OpNum+1);
378 const MCOperand &MO3 = MI->getOperand(OpNum+2);
380 printRegName(O, MO1.getReg());
382 // Print the shift opc.
383 ARM_AM::ShiftOpc ShOpc = ARM_AM::getSORegShOp(MO3.getImm());
384 O << ", " << ARM_AM::getShiftOpcStr(ShOpc);
385 if (ShOpc == ARM_AM::rrx)
389 printRegName(O, MO2.getReg());
390 assert(ARM_AM::getSORegOffset(MO3.getImm()) == 0);
393 void ARMInstPrinter::printSORegImmOperand(const MCInst *MI, unsigned OpNum,
395 const MCOperand &MO1 = MI->getOperand(OpNum);
396 const MCOperand &MO2 = MI->getOperand(OpNum+1);
398 printRegName(O, MO1.getReg());
400 // Print the shift opc.
401 printRegImmShift(O, ARM_AM::getSORegShOp(MO2.getImm()),
402 ARM_AM::getSORegOffset(MO2.getImm()), UseMarkup);
406 //===--------------------------------------------------------------------===//
407 // Addressing Mode #2
408 //===--------------------------------------------------------------------===//
410 void ARMInstPrinter::printAM2PreOrOffsetIndexOp(const MCInst *MI, unsigned Op,
412 const MCOperand &MO1 = MI->getOperand(Op);
413 const MCOperand &MO2 = MI->getOperand(Op+1);
414 const MCOperand &MO3 = MI->getOperand(Op+2);
416 O << markup("<mem:") << "[";
417 printRegName(O, MO1.getReg());
420 if (ARM_AM::getAM2Offset(MO3.getImm())) { // Don't print +0.
424 << ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO3.getImm()))
425 << ARM_AM::getAM2Offset(MO3.getImm())
428 O << "]" << markup(">");
433 O << ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO3.getImm()));
434 printRegName(O, MO2.getReg());
436 printRegImmShift(O, ARM_AM::getAM2ShiftOpc(MO3.getImm()),
437 ARM_AM::getAM2Offset(MO3.getImm()), UseMarkup);
438 O << "]" << markup(">");
441 void ARMInstPrinter::printAddrModeTBB(const MCInst *MI, unsigned Op,
443 const MCOperand &MO1 = MI->getOperand(Op);
444 const MCOperand &MO2 = MI->getOperand(Op+1);
445 O << markup("<mem:") << "[";
446 printRegName(O, MO1.getReg());
448 printRegName(O, MO2.getReg());
449 O << "]" << markup(">");
452 void ARMInstPrinter::printAddrModeTBH(const MCInst *MI, unsigned Op,
454 const MCOperand &MO1 = MI->getOperand(Op);
455 const MCOperand &MO2 = MI->getOperand(Op+1);
456 O << markup("<mem:") << "[";
457 printRegName(O, MO1.getReg());
459 printRegName(O, MO2.getReg());
460 O << ", lsl " << markup("<imm:") << "#1" << markup(">") << "]" << markup(">");
463 void ARMInstPrinter::printAddrMode2Operand(const MCInst *MI, unsigned Op,
465 const MCOperand &MO1 = MI->getOperand(Op);
467 if (!MO1.isReg()) { // FIXME: This is for CP entries, but isn't right.
468 printOperand(MI, Op, O);
473 const MCOperand &MO3 = MI->getOperand(Op+2);
474 unsigned IdxMode = ARM_AM::getAM2IdxMode(MO3.getImm());
475 assert(IdxMode != ARMII::IndexModePost &&
476 "Should be pre or offset index op");
479 printAM2PreOrOffsetIndexOp(MI, Op, O);
482 void ARMInstPrinter::printAddrMode2OffsetOperand(const MCInst *MI,
485 const MCOperand &MO1 = MI->getOperand(OpNum);
486 const MCOperand &MO2 = MI->getOperand(OpNum+1);
489 unsigned ImmOffs = ARM_AM::getAM2Offset(MO2.getImm());
491 << '#' << ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO2.getImm()))
497 O << ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO2.getImm()));
498 printRegName(O, MO1.getReg());
500 printRegImmShift(O, ARM_AM::getAM2ShiftOpc(MO2.getImm()),
501 ARM_AM::getAM2Offset(MO2.getImm()), UseMarkup);
504 //===--------------------------------------------------------------------===//
505 // Addressing Mode #3
506 //===--------------------------------------------------------------------===//
508 void ARMInstPrinter::printAM3PreOrOffsetIndexOp(const MCInst *MI, unsigned Op,
510 bool AlwaysPrintImm0) {
511 const MCOperand &MO1 = MI->getOperand(Op);
512 const MCOperand &MO2 = MI->getOperand(Op+1);
513 const MCOperand &MO3 = MI->getOperand(Op+2);
515 O << markup("<mem:") << '[';
516 printRegName(O, MO1.getReg());
519 O << ", " << getAddrOpcStr(ARM_AM::getAM3Op(MO3.getImm()));
520 printRegName(O, MO2.getReg());
521 O << ']' << markup(">");
525 //If the op is sub we have to print the immediate even if it is 0
526 unsigned ImmOffs = ARM_AM::getAM3Offset(MO3.getImm());
527 ARM_AM::AddrOpc op = ARM_AM::getAM3Op(MO3.getImm());
529 if (AlwaysPrintImm0 || ImmOffs || (op == ARM_AM::sub)) {
533 << ARM_AM::getAddrOpcStr(op)
537 O << ']' << markup(">");
540 template <bool AlwaysPrintImm0>
541 void ARMInstPrinter::printAddrMode3Operand(const MCInst *MI, unsigned Op,
543 const MCOperand &MO1 = MI->getOperand(Op);
544 if (!MO1.isReg()) { // For label symbolic references.
545 printOperand(MI, Op, O);
549 assert(ARM_AM::getAM3IdxMode(MI->getOperand(Op + 2).getImm()) !=
550 ARMII::IndexModePost &&
551 "unexpected idxmode");
552 printAM3PreOrOffsetIndexOp(MI, Op, O, AlwaysPrintImm0);
555 void ARMInstPrinter::printAddrMode3OffsetOperand(const MCInst *MI,
558 const MCOperand &MO1 = MI->getOperand(OpNum);
559 const MCOperand &MO2 = MI->getOperand(OpNum+1);
562 O << getAddrOpcStr(ARM_AM::getAM3Op(MO2.getImm()));
563 printRegName(O, MO1.getReg());
567 unsigned ImmOffs = ARM_AM::getAM3Offset(MO2.getImm());
569 << '#' << ARM_AM::getAddrOpcStr(ARM_AM::getAM3Op(MO2.getImm())) << ImmOffs
573 void ARMInstPrinter::printPostIdxImm8Operand(const MCInst *MI,
576 const MCOperand &MO = MI->getOperand(OpNum);
577 unsigned Imm = MO.getImm();
579 << '#' << ((Imm & 256) ? "" : "-") << (Imm & 0xff)
583 void ARMInstPrinter::printPostIdxRegOperand(const MCInst *MI, unsigned OpNum,
585 const MCOperand &MO1 = MI->getOperand(OpNum);
586 const MCOperand &MO2 = MI->getOperand(OpNum+1);
588 O << (MO2.getImm() ? "" : "-");
589 printRegName(O, MO1.getReg());
592 void ARMInstPrinter::printPostIdxImm8s4Operand(const MCInst *MI,
595 const MCOperand &MO = MI->getOperand(OpNum);
596 unsigned Imm = MO.getImm();
598 << '#' << ((Imm & 256) ? "" : "-") << ((Imm & 0xff) << 2)
603 void ARMInstPrinter::printLdStmModeOperand(const MCInst *MI, unsigned OpNum,
605 ARM_AM::AMSubMode Mode = ARM_AM::getAM4SubMode(MI->getOperand(OpNum)
607 O << ARM_AM::getAMSubModeStr(Mode);
610 template <bool AlwaysPrintImm0>
611 void ARMInstPrinter::printAddrMode5Operand(const MCInst *MI, unsigned OpNum,
613 const MCOperand &MO1 = MI->getOperand(OpNum);
614 const MCOperand &MO2 = MI->getOperand(OpNum+1);
616 if (!MO1.isReg()) { // FIXME: This is for CP entries, but isn't right.
617 printOperand(MI, OpNum, O);
621 O << markup("<mem:") << "[";
622 printRegName(O, MO1.getReg());
624 unsigned ImmOffs = ARM_AM::getAM5Offset(MO2.getImm());
625 unsigned Op = ARM_AM::getAM5Op(MO2.getImm());
626 if (AlwaysPrintImm0 || ImmOffs || Op == ARM_AM::sub) {
630 << ARM_AM::getAddrOpcStr(ARM_AM::getAM5Op(MO2.getImm()))
634 O << "]" << markup(">");
637 void ARMInstPrinter::printAddrMode6Operand(const MCInst *MI, unsigned OpNum,
639 const MCOperand &MO1 = MI->getOperand(OpNum);
640 const MCOperand &MO2 = MI->getOperand(OpNum+1);
642 O << markup("<mem:") << "[";
643 printRegName(O, MO1.getReg());
645 O << ":" << (MO2.getImm() << 3);
647 O << "]" << markup(">");
650 void ARMInstPrinter::printAddrMode7Operand(const MCInst *MI, unsigned OpNum,
652 const MCOperand &MO1 = MI->getOperand(OpNum);
653 O << markup("<mem:") << "[";
654 printRegName(O, MO1.getReg());
655 O << "]" << markup(">");
658 void ARMInstPrinter::printAddrMode6OffsetOperand(const MCInst *MI,
661 const MCOperand &MO = MI->getOperand(OpNum);
662 if (MO.getReg() == 0)
666 printRegName(O, MO.getReg());
670 void ARMInstPrinter::printBitfieldInvMaskImmOperand(const MCInst *MI,
673 const MCOperand &MO = MI->getOperand(OpNum);
674 uint32_t v = ~MO.getImm();
675 int32_t lsb = countTrailingZeros(v);
676 int32_t width = (32 - countLeadingZeros (v)) - lsb;
677 assert(MO.isImm() && "Not a valid bf_inv_mask_imm value!");
678 O << markup("<imm:") << '#' << lsb << markup(">")
680 << markup("<imm:") << '#' << width << markup(">");
683 void ARMInstPrinter::printMemBOption(const MCInst *MI, unsigned OpNum,
685 unsigned val = MI->getOperand(OpNum).getImm();
686 O << ARM_MB::MemBOptToString(val, (getAvailableFeatures() & ARM::HasV8Ops));
689 void ARMInstPrinter::printInstSyncBOption(const MCInst *MI, unsigned OpNum,
691 unsigned val = MI->getOperand(OpNum).getImm();
692 O << ARM_ISB::InstSyncBOptToString(val);
695 void ARMInstPrinter::printShiftImmOperand(const MCInst *MI, unsigned OpNum,
697 unsigned ShiftOp = MI->getOperand(OpNum).getImm();
698 bool isASR = (ShiftOp & (1 << 5)) != 0;
699 unsigned Amt = ShiftOp & 0x1f;
703 << "#" << (Amt == 0 ? 32 : Amt)
714 void ARMInstPrinter::printPKHLSLShiftImm(const MCInst *MI, unsigned OpNum,
716 unsigned Imm = MI->getOperand(OpNum).getImm();
719 assert(Imm > 0 && Imm < 32 && "Invalid PKH shift immediate value!");
720 O << ", lsl " << markup("<imm:") << "#" << Imm << markup(">");
723 void ARMInstPrinter::printPKHASRShiftImm(const MCInst *MI, unsigned OpNum,
725 unsigned Imm = MI->getOperand(OpNum).getImm();
726 // A shift amount of 32 is encoded as 0.
729 assert(Imm > 0 && Imm <= 32 && "Invalid PKH shift immediate value!");
730 O << ", asr " << markup("<imm:") << "#" << Imm << markup(">");
733 void ARMInstPrinter::printRegisterList(const MCInst *MI, unsigned OpNum,
736 for (unsigned i = OpNum, e = MI->getNumOperands(); i != e; ++i) {
737 if (i != OpNum) O << ", ";
738 printRegName(O, MI->getOperand(i).getReg());
743 void ARMInstPrinter::printGPRPairOperand(const MCInst *MI, unsigned OpNum,
745 unsigned Reg = MI->getOperand(OpNum).getReg();
746 printRegName(O, MRI.getSubReg(Reg, ARM::gsub_0));
748 printRegName(O, MRI.getSubReg(Reg, ARM::gsub_1));
752 void ARMInstPrinter::printSetendOperand(const MCInst *MI, unsigned OpNum,
754 const MCOperand &Op = MI->getOperand(OpNum);
761 void ARMInstPrinter::printCPSIMod(const MCInst *MI, unsigned OpNum,
763 const MCOperand &Op = MI->getOperand(OpNum);
764 O << ARM_PROC::IModToString(Op.getImm());
767 void ARMInstPrinter::printCPSIFlag(const MCInst *MI, unsigned OpNum,
769 const MCOperand &Op = MI->getOperand(OpNum);
770 unsigned IFlags = Op.getImm();
771 for (int i=2; i >= 0; --i)
772 if (IFlags & (1 << i))
773 O << ARM_PROC::IFlagsToString(1 << i);
779 void ARMInstPrinter::printMSRMaskOperand(const MCInst *MI, unsigned OpNum,
781 const MCOperand &Op = MI->getOperand(OpNum);
782 unsigned SpecRegRBit = Op.getImm() >> 4;
783 unsigned Mask = Op.getImm() & 0xf;
784 uint64_t FeatureBits = getAvailableFeatures();
786 if (FeatureBits & ARM::FeatureMClass) {
787 unsigned SYSm = Op.getImm();
788 unsigned Opcode = MI->getOpcode();
790 // For writes, handle extended mask bits if the DSP extension is present.
791 if (Opcode == ARM::t2MSR_M && (FeatureBits & ARM::FeatureDSPThumb2)) {
793 case 0x400: O << "apsr_g"; return;
794 case 0xc00: O << "apsr_nzcvqg"; return;
795 case 0x401: O << "iapsr_g"; return;
796 case 0xc01: O << "iapsr_nzcvqg"; return;
797 case 0x402: O << "eapsr_g"; return;
798 case 0xc02: O << "eapsr_nzcvqg"; return;
799 case 0x403: O << "xpsr_g"; return;
800 case 0xc03: O << "xpsr_nzcvqg"; return;
804 // Handle the basic 8-bit mask.
807 if (Opcode == ARM::t2MSR_M && (FeatureBits & ARM::HasV7Ops)) {
808 // ARMv7-M deprecates using MSR APSR without a _<bits> qualifier as an
809 // alias for MSR APSR_nzcvq.
811 case 0: O << "apsr_nzcvq"; return;
812 case 1: O << "iapsr_nzcvq"; return;
813 case 2: O << "eapsr_nzcvq"; return;
814 case 3: O << "xpsr_nzcvq"; return;
819 default: llvm_unreachable("Unexpected mask value!");
820 case 0: O << "apsr"; return;
821 case 1: O << "iapsr"; return;
822 case 2: O << "eapsr"; return;
823 case 3: O << "xpsr"; return;
824 case 5: O << "ipsr"; return;
825 case 6: O << "epsr"; return;
826 case 7: O << "iepsr"; return;
827 case 8: O << "msp"; return;
828 case 9: O << "psp"; return;
829 case 16: O << "primask"; return;
830 case 17: O << "basepri"; return;
831 case 18: O << "basepri_max"; return;
832 case 19: O << "faultmask"; return;
833 case 20: O << "control"; return;
837 // As special cases, CPSR_f, CPSR_s and CPSR_fs prefer printing as
838 // APSR_nzcvq, APSR_g and APSRnzcvqg, respectively.
839 if (!SpecRegRBit && (Mask == 8 || Mask == 4 || Mask == 12)) {
842 default: llvm_unreachable("Unexpected mask value!");
843 case 4: O << "g"; return;
844 case 8: O << "nzcvq"; return;
845 case 12: O << "nzcvqg"; return;
856 if (Mask & 8) O << 'f';
857 if (Mask & 4) O << 's';
858 if (Mask & 2) O << 'x';
859 if (Mask & 1) O << 'c';
863 void ARMInstPrinter::printBankedRegOperand(const MCInst *MI, unsigned OpNum,
865 uint32_t Banked = MI->getOperand(OpNum).getImm();
866 uint32_t R = (Banked & 0x20) >> 5;
867 uint32_t SysM = Banked & 0x1f;
869 // Nothing much we can do about this, the encodings are specified in B9.2.3 of
870 // the ARM ARM v7C, and are all over the shop.
875 case 0x0e: O << "fiq"; return;
876 case 0x10: O << "irq"; return;
877 case 0x12: O << "svc"; return;
878 case 0x14: O << "abt"; return;
879 case 0x16: O << "und"; return;
880 case 0x1c: O << "mon"; return;
881 case 0x1e: O << "hyp"; return;
882 default: llvm_unreachable("Invalid banked SPSR register");
886 assert(!R && "should have dealt with SPSR regs");
887 const char *RegNames[] = {
888 "r8_usr", "r9_usr", "r10_usr", "r11_usr", "r12_usr", "sp_usr", "lr_usr", "",
889 "r8_fiq", "r9_fiq", "r10_fiq", "r11_fiq", "r12_fiq", "sp_fiq", "lr_fiq", "",
890 "lr_irq", "sp_irq", "lr_svc", "sp_svc", "lr_abt", "sp_abt", "lr_und", "sp_und",
891 "", "", "", "", "lr_mon", "sp_mon", "elr_hyp", "sp_hyp"
893 const char *Name = RegNames[SysM];
894 assert(Name[0] && "invalid banked register operand");
899 void ARMInstPrinter::printPredicateOperand(const MCInst *MI, unsigned OpNum,
901 ARMCC::CondCodes CC = (ARMCC::CondCodes)MI->getOperand(OpNum).getImm();
902 // Handle the undefined 15 CC value here for printing so we don't abort().
903 if ((unsigned)CC == 15)
905 else if (CC != ARMCC::AL)
906 O << ARMCondCodeToString(CC);
909 void ARMInstPrinter::printMandatoryPredicateOperand(const MCInst *MI,
912 ARMCC::CondCodes CC = (ARMCC::CondCodes)MI->getOperand(OpNum).getImm();
913 O << ARMCondCodeToString(CC);
916 void ARMInstPrinter::printSBitModifierOperand(const MCInst *MI, unsigned OpNum,
918 if (MI->getOperand(OpNum).getReg()) {
919 assert(MI->getOperand(OpNum).getReg() == ARM::CPSR &&
920 "Expect ARM CPSR register!");
925 void ARMInstPrinter::printNoHashImmediate(const MCInst *MI, unsigned OpNum,
927 O << MI->getOperand(OpNum).getImm();
930 void ARMInstPrinter::printPImmediate(const MCInst *MI, unsigned OpNum,
932 O << "p" << MI->getOperand(OpNum).getImm();
935 void ARMInstPrinter::printCImmediate(const MCInst *MI, unsigned OpNum,
937 O << "c" << MI->getOperand(OpNum).getImm();
940 void ARMInstPrinter::printCoprocOptionImm(const MCInst *MI, unsigned OpNum,
942 O << "{" << MI->getOperand(OpNum).getImm() << "}";
945 void ARMInstPrinter::printPCLabel(const MCInst *MI, unsigned OpNum,
947 llvm_unreachable("Unhandled PC-relative pseudo-instruction!");
950 template<unsigned scale>
951 void ARMInstPrinter::printAdrLabelOperand(const MCInst *MI, unsigned OpNum,
953 const MCOperand &MO = MI->getOperand(OpNum);
960 int32_t OffImm = (int32_t)MO.getImm() << scale;
962 O << markup("<imm:");
963 if (OffImm == INT32_MIN)
966 O << "#-" << -OffImm;
972 void ARMInstPrinter::printThumbS4ImmOperand(const MCInst *MI, unsigned OpNum,
975 << "#" << formatImm(MI->getOperand(OpNum).getImm() * 4)
979 void ARMInstPrinter::printThumbSRImm(const MCInst *MI, unsigned OpNum,
981 unsigned Imm = MI->getOperand(OpNum).getImm();
983 << "#" << formatImm((Imm == 0 ? 32 : Imm))
987 void ARMInstPrinter::printThumbITMask(const MCInst *MI, unsigned OpNum,
989 // (3 - the number of trailing zeros) is the number of then / else.
990 unsigned Mask = MI->getOperand(OpNum).getImm();
991 unsigned Firstcond = MI->getOperand(OpNum-1).getImm();
992 unsigned CondBit0 = Firstcond & 1;
993 unsigned NumTZ = countTrailingZeros(Mask);
994 assert(NumTZ <= 3 && "Invalid IT mask!");
995 for (unsigned Pos = 3, e = NumTZ; Pos > e; --Pos) {
996 bool T = ((Mask >> Pos) & 1) == CondBit0;
1004 void ARMInstPrinter::printThumbAddrModeRROperand(const MCInst *MI, unsigned Op,
1006 const MCOperand &MO1 = MI->getOperand(Op);
1007 const MCOperand &MO2 = MI->getOperand(Op + 1);
1009 if (!MO1.isReg()) { // FIXME: This is for CP entries, but isn't right.
1010 printOperand(MI, Op, O);
1014 O << markup("<mem:") << "[";
1015 printRegName(O, MO1.getReg());
1016 if (unsigned RegNum = MO2.getReg()) {
1018 printRegName(O, RegNum);
1020 O << "]" << markup(">");
1023 void ARMInstPrinter::printThumbAddrModeImm5SOperand(const MCInst *MI,
1027 const MCOperand &MO1 = MI->getOperand(Op);
1028 const MCOperand &MO2 = MI->getOperand(Op + 1);
1030 if (!MO1.isReg()) { // FIXME: This is for CP entries, but isn't right.
1031 printOperand(MI, Op, O);
1035 O << markup("<mem:") << "[";
1036 printRegName(O, MO1.getReg());
1037 if (unsigned ImmOffs = MO2.getImm()) {
1040 << "#" << formatImm(ImmOffs * Scale)
1043 O << "]" << markup(">");
1046 void ARMInstPrinter::printThumbAddrModeImm5S1Operand(const MCInst *MI,
1049 printThumbAddrModeImm5SOperand(MI, Op, O, 1);
1052 void ARMInstPrinter::printThumbAddrModeImm5S2Operand(const MCInst *MI,
1055 printThumbAddrModeImm5SOperand(MI, Op, O, 2);
1058 void ARMInstPrinter::printThumbAddrModeImm5S4Operand(const MCInst *MI,
1061 printThumbAddrModeImm5SOperand(MI, Op, O, 4);
1064 void ARMInstPrinter::printThumbAddrModeSPOperand(const MCInst *MI, unsigned Op,
1066 printThumbAddrModeImm5SOperand(MI, Op, O, 4);
1069 // Constant shifts t2_so_reg is a 2-operand unit corresponding to the Thumb2
1070 // register with shift forms.
1071 // REG 0 0 - e.g. R5
1072 // REG IMM, SH_OPC - e.g. R5, LSL #3
1073 void ARMInstPrinter::printT2SOOperand(const MCInst *MI, unsigned OpNum,
1075 const MCOperand &MO1 = MI->getOperand(OpNum);
1076 const MCOperand &MO2 = MI->getOperand(OpNum+1);
1078 unsigned Reg = MO1.getReg();
1079 printRegName(O, Reg);
1081 // Print the shift opc.
1082 assert(MO2.isImm() && "Not a valid t2_so_reg value!");
1083 printRegImmShift(O, ARM_AM::getSORegShOp(MO2.getImm()),
1084 ARM_AM::getSORegOffset(MO2.getImm()), UseMarkup);
1087 template <bool AlwaysPrintImm0>
1088 void ARMInstPrinter::printAddrModeImm12Operand(const MCInst *MI, unsigned OpNum,
1090 const MCOperand &MO1 = MI->getOperand(OpNum);
1091 const MCOperand &MO2 = MI->getOperand(OpNum+1);
1093 if (!MO1.isReg()) { // FIXME: This is for CP entries, but isn't right.
1094 printOperand(MI, OpNum, O);
1098 O << markup("<mem:") << "[";
1099 printRegName(O, MO1.getReg());
1101 int32_t OffImm = (int32_t)MO2.getImm();
1102 bool isSub = OffImm < 0;
1103 // Special value for #-0. All others are normal.
1104 if (OffImm == INT32_MIN)
1109 << "#-" << formatImm(-OffImm)
1112 else if (AlwaysPrintImm0 || OffImm > 0) {
1115 << "#" << formatImm(OffImm)
1118 O << "]" << markup(">");
1121 template<bool AlwaysPrintImm0>
1122 void ARMInstPrinter::printT2AddrModeImm8Operand(const MCInst *MI,
1125 const MCOperand &MO1 = MI->getOperand(OpNum);
1126 const MCOperand &MO2 = MI->getOperand(OpNum+1);
1128 O << markup("<mem:") << "[";
1129 printRegName(O, MO1.getReg());
1131 int32_t OffImm = (int32_t)MO2.getImm();
1132 bool isSub = OffImm < 0;
1134 if (OffImm == INT32_MIN)
1141 } else if (AlwaysPrintImm0 || OffImm > 0) {
1147 O << "]" << markup(">");
1150 template<bool AlwaysPrintImm0>
1151 void ARMInstPrinter::printT2AddrModeImm8s4Operand(const MCInst *MI,
1154 const MCOperand &MO1 = MI->getOperand(OpNum);
1155 const MCOperand &MO2 = MI->getOperand(OpNum+1);
1157 if (!MO1.isReg()) { // For label symbolic references.
1158 printOperand(MI, OpNum, O);
1162 O << markup("<mem:") << "[";
1163 printRegName(O, MO1.getReg());
1165 int32_t OffImm = (int32_t)MO2.getImm();
1166 bool isSub = OffImm < 0;
1168 assert(((OffImm & 0x3) == 0) && "Not a valid immediate!");
1171 if (OffImm == INT32_MIN)
1178 } else if (AlwaysPrintImm0 || OffImm > 0) {
1184 O << "]" << markup(">");
1187 void ARMInstPrinter::printT2AddrModeImm0_1020s4Operand(const MCInst *MI,
1190 const MCOperand &MO1 = MI->getOperand(OpNum);
1191 const MCOperand &MO2 = MI->getOperand(OpNum+1);
1193 O << markup("<mem:") << "[";
1194 printRegName(O, MO1.getReg());
1198 << "#" << formatImm(MO2.getImm() * 4)
1201 O << "]" << markup(">");
1204 void ARMInstPrinter::printT2AddrModeImm8OffsetOperand(const MCInst *MI,
1207 const MCOperand &MO1 = MI->getOperand(OpNum);
1208 int32_t OffImm = (int32_t)MO1.getImm();
1209 O << ", " << markup("<imm:");
1210 if (OffImm == INT32_MIN)
1212 else if (OffImm < 0)
1213 O << "#-" << -OffImm;
1219 void ARMInstPrinter::printT2AddrModeImm8s4OffsetOperand(const MCInst *MI,
1222 const MCOperand &MO1 = MI->getOperand(OpNum);
1223 int32_t OffImm = (int32_t)MO1.getImm();
1225 assert(((OffImm & 0x3) == 0) && "Not a valid immediate!");
1227 O << ", " << markup("<imm:");
1228 if (OffImm == INT32_MIN)
1230 else if (OffImm < 0)
1231 O << "#-" << -OffImm;
1237 void ARMInstPrinter::printT2AddrModeSoRegOperand(const MCInst *MI,
1240 const MCOperand &MO1 = MI->getOperand(OpNum);
1241 const MCOperand &MO2 = MI->getOperand(OpNum+1);
1242 const MCOperand &MO3 = MI->getOperand(OpNum+2);
1244 O << markup("<mem:") << "[";
1245 printRegName(O, MO1.getReg());
1247 assert(MO2.getReg() && "Invalid so_reg load / store address!");
1249 printRegName(O, MO2.getReg());
1251 unsigned ShAmt = MO3.getImm();
1253 assert(ShAmt <= 3 && "Not a valid Thumb2 addressing mode!");
1259 O << "]" << markup(">");
1262 void ARMInstPrinter::printFPImmOperand(const MCInst *MI, unsigned OpNum,
1264 const MCOperand &MO = MI->getOperand(OpNum);
1265 O << markup("<imm:")
1266 << '#' << ARM_AM::getFPImmFloat(MO.getImm())
1270 void ARMInstPrinter::printNEONModImmOperand(const MCInst *MI, unsigned OpNum,
1272 unsigned EncodedImm = MI->getOperand(OpNum).getImm();
1274 uint64_t Val = ARM_AM::decodeNEONModImm(EncodedImm, EltBits);
1275 O << markup("<imm:")
1281 void ARMInstPrinter::printImmPlusOneOperand(const MCInst *MI, unsigned OpNum,
1283 unsigned Imm = MI->getOperand(OpNum).getImm();
1284 O << markup("<imm:")
1285 << "#" << formatImm(Imm + 1)
1289 void ARMInstPrinter::printRotImmOperand(const MCInst *MI, unsigned OpNum,
1291 unsigned Imm = MI->getOperand(OpNum).getImm();
1298 default: assert (0 && "illegal ror immediate!");
1299 case 1: O << "8"; break;
1300 case 2: O << "16"; break;
1301 case 3: O << "24"; break;
1306 void ARMInstPrinter::printFBits16(const MCInst *MI, unsigned OpNum,
1308 O << markup("<imm:")
1309 << "#" << 16 - MI->getOperand(OpNum).getImm()
1313 void ARMInstPrinter::printFBits32(const MCInst *MI, unsigned OpNum,
1315 O << markup("<imm:")
1316 << "#" << 32 - MI->getOperand(OpNum).getImm()
1320 void ARMInstPrinter::printVectorIndex(const MCInst *MI, unsigned OpNum,
1322 O << "[" << MI->getOperand(OpNum).getImm() << "]";
1325 void ARMInstPrinter::printVectorListOne(const MCInst *MI, unsigned OpNum,
1328 printRegName(O, MI->getOperand(OpNum).getReg());
1332 void ARMInstPrinter::printVectorListTwo(const MCInst *MI, unsigned OpNum,
1334 unsigned Reg = MI->getOperand(OpNum).getReg();
1335 unsigned Reg0 = MRI.getSubReg(Reg, ARM::dsub_0);
1336 unsigned Reg1 = MRI.getSubReg(Reg, ARM::dsub_1);
1338 printRegName(O, Reg0);
1340 printRegName(O, Reg1);
1344 void ARMInstPrinter::printVectorListTwoSpaced(const MCInst *MI,
1347 unsigned Reg = MI->getOperand(OpNum).getReg();
1348 unsigned Reg0 = MRI.getSubReg(Reg, ARM::dsub_0);
1349 unsigned Reg1 = MRI.getSubReg(Reg, ARM::dsub_2);
1351 printRegName(O, Reg0);
1353 printRegName(O, Reg1);
1357 void ARMInstPrinter::printVectorListThree(const MCInst *MI, unsigned OpNum,
1359 // Normally, it's not safe to use register enum values directly with
1360 // addition to get the next register, but for VFP registers, the
1361 // sort order is guaranteed because they're all of the form D<n>.
1363 printRegName(O, MI->getOperand(OpNum).getReg());
1365 printRegName(O, MI->getOperand(OpNum).getReg() + 1);
1367 printRegName(O, MI->getOperand(OpNum).getReg() + 2);
1371 void ARMInstPrinter::printVectorListFour(const MCInst *MI, unsigned OpNum,
1373 // Normally, it's not safe to use register enum values directly with
1374 // addition to get the next register, but for VFP registers, the
1375 // sort order is guaranteed because they're all of the form D<n>.
1377 printRegName(O, MI->getOperand(OpNum).getReg());
1379 printRegName(O, MI->getOperand(OpNum).getReg() + 1);
1381 printRegName(O, MI->getOperand(OpNum).getReg() + 2);
1383 printRegName(O, MI->getOperand(OpNum).getReg() + 3);
1387 void ARMInstPrinter::printVectorListOneAllLanes(const MCInst *MI,
1391 printRegName(O, MI->getOperand(OpNum).getReg());
1395 void ARMInstPrinter::printVectorListTwoAllLanes(const MCInst *MI,
1398 unsigned Reg = MI->getOperand(OpNum).getReg();
1399 unsigned Reg0 = MRI.getSubReg(Reg, ARM::dsub_0);
1400 unsigned Reg1 = MRI.getSubReg(Reg, ARM::dsub_1);
1402 printRegName(O, Reg0);
1404 printRegName(O, Reg1);
1408 void ARMInstPrinter::printVectorListThreeAllLanes(const MCInst *MI,
1411 // Normally, it's not safe to use register enum values directly with
1412 // addition to get the next register, but for VFP registers, the
1413 // sort order is guaranteed because they're all of the form D<n>.
1415 printRegName(O, MI->getOperand(OpNum).getReg());
1417 printRegName(O, MI->getOperand(OpNum).getReg() + 1);
1419 printRegName(O, MI->getOperand(OpNum).getReg() + 2);
1423 void ARMInstPrinter::printVectorListFourAllLanes(const MCInst *MI,
1426 // Normally, it's not safe to use register enum values directly with
1427 // addition to get the next register, but for VFP registers, the
1428 // sort order is guaranteed because they're all of the form D<n>.
1430 printRegName(O, MI->getOperand(OpNum).getReg());
1432 printRegName(O, MI->getOperand(OpNum).getReg() + 1);
1434 printRegName(O, MI->getOperand(OpNum).getReg() + 2);
1436 printRegName(O, MI->getOperand(OpNum).getReg() + 3);
1440 void ARMInstPrinter::printVectorListTwoSpacedAllLanes(const MCInst *MI,
1443 unsigned Reg = MI->getOperand(OpNum).getReg();
1444 unsigned Reg0 = MRI.getSubReg(Reg, ARM::dsub_0);
1445 unsigned Reg1 = MRI.getSubReg(Reg, ARM::dsub_2);
1447 printRegName(O, Reg0);
1449 printRegName(O, Reg1);
1453 void ARMInstPrinter::printVectorListThreeSpacedAllLanes(const MCInst *MI,
1456 // Normally, it's not safe to use register enum values directly with
1457 // addition to get the next register, but for VFP registers, the
1458 // sort order is guaranteed because they're all of the form D<n>.
1460 printRegName(O, MI->getOperand(OpNum).getReg());
1462 printRegName(O, MI->getOperand(OpNum).getReg() + 2);
1464 printRegName(O, MI->getOperand(OpNum).getReg() + 4);
1468 void ARMInstPrinter::printVectorListFourSpacedAllLanes(const MCInst *MI,
1471 // Normally, it's not safe to use register enum values directly with
1472 // addition to get the next register, but for VFP registers, the
1473 // sort order is guaranteed because they're all of the form D<n>.
1475 printRegName(O, MI->getOperand(OpNum).getReg());
1477 printRegName(O, MI->getOperand(OpNum).getReg() + 2);
1479 printRegName(O, MI->getOperand(OpNum).getReg() + 4);
1481 printRegName(O, MI->getOperand(OpNum).getReg() + 6);
1485 void ARMInstPrinter::printVectorListThreeSpaced(const MCInst *MI,
1488 // Normally, it's not safe to use register enum values directly with
1489 // addition to get the next register, but for VFP registers, the
1490 // sort order is guaranteed because they're all of the form D<n>.
1492 printRegName(O, MI->getOperand(OpNum).getReg());
1494 printRegName(O, MI->getOperand(OpNum).getReg() + 2);
1496 printRegName(O, MI->getOperand(OpNum).getReg() + 4);
1500 void ARMInstPrinter::printVectorListFourSpaced(const MCInst *MI,
1503 // Normally, it's not safe to use register enum values directly with
1504 // addition to get the next register, but for VFP registers, the
1505 // sort order is guaranteed because they're all of the form D<n>.
1507 printRegName(O, MI->getOperand(OpNum).getReg());
1509 printRegName(O, MI->getOperand(OpNum).getReg() + 2);
1511 printRegName(O, MI->getOperand(OpNum).getReg() + 4);
1513 printRegName(O, MI->getOperand(OpNum).getReg() + 6);