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);
295 printInstruction(MI, O);
296 printAnnotation(O, Annot);
299 void ARMInstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
301 const MCOperand &Op = MI->getOperand(OpNo);
303 unsigned Reg = Op.getReg();
304 printRegName(O, Reg);
305 } else if (Op.isImm()) {
307 << '#' << formatImm(Op.getImm())
310 assert(Op.isExpr() && "unknown operand kind in printOperand");
311 const MCExpr *Expr = Op.getExpr();
312 switch (Expr->getKind()) {
316 case MCExpr::Constant: {
317 // If a symbolic branch target was added as a constant expression then
318 // print that address in hex. And only print 32 unsigned bits for the
320 const MCConstantExpr *Constant = cast<MCConstantExpr>(Expr);
321 int64_t TargetAddress;
322 if (!Constant->EvaluateAsAbsolute(TargetAddress)) {
326 O.write_hex(static_cast<uint32_t>(TargetAddress));
331 // FIXME: Should we always treat this as if it is a constant literal and
332 // prefix it with '#'?
339 void ARMInstPrinter::printThumbLdrLabelOperand(const MCInst *MI, unsigned OpNum,
341 const MCOperand &MO1 = MI->getOperand(OpNum);
347 O << markup("<mem:") << "[pc, ";
349 int32_t OffImm = (int32_t)MO1.getImm();
350 bool isSub = OffImm < 0;
352 // Special value for #-0. All others are normal.
353 if (OffImm == INT32_MIN)
357 << "#-" << formatImm(-OffImm)
361 << "#" << formatImm(OffImm)
364 O << "]" << markup(">");
367 // so_reg is a 4-operand unit corresponding to register forms of the A5.1
368 // "Addressing Mode 1 - Data-processing operands" forms. This includes:
370 // REG REG 0,SH_OPC - e.g. R5, ROR R3
371 // REG 0 IMM,SH_OPC - e.g. R5, LSL #3
372 void ARMInstPrinter::printSORegRegOperand(const MCInst *MI, unsigned OpNum,
374 const MCOperand &MO1 = MI->getOperand(OpNum);
375 const MCOperand &MO2 = MI->getOperand(OpNum+1);
376 const MCOperand &MO3 = MI->getOperand(OpNum+2);
378 printRegName(O, MO1.getReg());
380 // Print the shift opc.
381 ARM_AM::ShiftOpc ShOpc = ARM_AM::getSORegShOp(MO3.getImm());
382 O << ", " << ARM_AM::getShiftOpcStr(ShOpc);
383 if (ShOpc == ARM_AM::rrx)
387 printRegName(O, MO2.getReg());
388 assert(ARM_AM::getSORegOffset(MO3.getImm()) == 0);
391 void ARMInstPrinter::printSORegImmOperand(const MCInst *MI, unsigned OpNum,
393 const MCOperand &MO1 = MI->getOperand(OpNum);
394 const MCOperand &MO2 = MI->getOperand(OpNum+1);
396 printRegName(O, MO1.getReg());
398 // Print the shift opc.
399 printRegImmShift(O, ARM_AM::getSORegShOp(MO2.getImm()),
400 ARM_AM::getSORegOffset(MO2.getImm()), UseMarkup);
404 //===--------------------------------------------------------------------===//
405 // Addressing Mode #2
406 //===--------------------------------------------------------------------===//
408 void ARMInstPrinter::printAM2PreOrOffsetIndexOp(const MCInst *MI, unsigned Op,
410 const MCOperand &MO1 = MI->getOperand(Op);
411 const MCOperand &MO2 = MI->getOperand(Op+1);
412 const MCOperand &MO3 = MI->getOperand(Op+2);
414 O << markup("<mem:") << "[";
415 printRegName(O, MO1.getReg());
418 if (ARM_AM::getAM2Offset(MO3.getImm())) { // Don't print +0.
422 << ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO3.getImm()))
423 << ARM_AM::getAM2Offset(MO3.getImm())
426 O << "]" << markup(">");
431 O << ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO3.getImm()));
432 printRegName(O, MO2.getReg());
434 printRegImmShift(O, ARM_AM::getAM2ShiftOpc(MO3.getImm()),
435 ARM_AM::getAM2Offset(MO3.getImm()), UseMarkup);
436 O << "]" << markup(">");
439 void ARMInstPrinter::printAddrModeTBB(const MCInst *MI, unsigned Op,
441 const MCOperand &MO1 = MI->getOperand(Op);
442 const MCOperand &MO2 = MI->getOperand(Op+1);
443 O << markup("<mem:") << "[";
444 printRegName(O, MO1.getReg());
446 printRegName(O, MO2.getReg());
447 O << "]" << markup(">");
450 void ARMInstPrinter::printAddrModeTBH(const MCInst *MI, unsigned Op,
452 const MCOperand &MO1 = MI->getOperand(Op);
453 const MCOperand &MO2 = MI->getOperand(Op+1);
454 O << markup("<mem:") << "[";
455 printRegName(O, MO1.getReg());
457 printRegName(O, MO2.getReg());
458 O << ", lsl " << markup("<imm:") << "#1" << markup(">") << "]" << markup(">");
461 void ARMInstPrinter::printAddrMode2Operand(const MCInst *MI, unsigned Op,
463 const MCOperand &MO1 = MI->getOperand(Op);
465 if (!MO1.isReg()) { // FIXME: This is for CP entries, but isn't right.
466 printOperand(MI, Op, O);
471 const MCOperand &MO3 = MI->getOperand(Op+2);
472 unsigned IdxMode = ARM_AM::getAM2IdxMode(MO3.getImm());
473 assert(IdxMode != ARMII::IndexModePost &&
474 "Should be pre or offset index op");
477 printAM2PreOrOffsetIndexOp(MI, Op, O);
480 void ARMInstPrinter::printAddrMode2OffsetOperand(const MCInst *MI,
483 const MCOperand &MO1 = MI->getOperand(OpNum);
484 const MCOperand &MO2 = MI->getOperand(OpNum+1);
487 unsigned ImmOffs = ARM_AM::getAM2Offset(MO2.getImm());
489 << '#' << ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO2.getImm()))
495 O << ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO2.getImm()));
496 printRegName(O, MO1.getReg());
498 printRegImmShift(O, ARM_AM::getAM2ShiftOpc(MO2.getImm()),
499 ARM_AM::getAM2Offset(MO2.getImm()), UseMarkup);
502 //===--------------------------------------------------------------------===//
503 // Addressing Mode #3
504 //===--------------------------------------------------------------------===//
506 void ARMInstPrinter::printAM3PreOrOffsetIndexOp(const MCInst *MI, unsigned Op,
508 bool AlwaysPrintImm0) {
509 const MCOperand &MO1 = MI->getOperand(Op);
510 const MCOperand &MO2 = MI->getOperand(Op+1);
511 const MCOperand &MO3 = MI->getOperand(Op+2);
513 O << markup("<mem:") << '[';
514 printRegName(O, MO1.getReg());
517 O << ", " << getAddrOpcStr(ARM_AM::getAM3Op(MO3.getImm()));
518 printRegName(O, MO2.getReg());
519 O << ']' << markup(">");
523 //If the op is sub we have to print the immediate even if it is 0
524 unsigned ImmOffs = ARM_AM::getAM3Offset(MO3.getImm());
525 ARM_AM::AddrOpc op = ARM_AM::getAM3Op(MO3.getImm());
527 if (AlwaysPrintImm0 || ImmOffs || (op == ARM_AM::sub)) {
531 << ARM_AM::getAddrOpcStr(op)
535 O << ']' << markup(">");
538 template <bool AlwaysPrintImm0>
539 void ARMInstPrinter::printAddrMode3Operand(const MCInst *MI, unsigned Op,
541 const MCOperand &MO1 = MI->getOperand(Op);
542 if (!MO1.isReg()) { // For label symbolic references.
543 printOperand(MI, Op, O);
547 const MCOperand &MO3 = MI->getOperand(Op+2);
549 assert(ARM_AM::getAM3IdxMode(MO3.getImm()) != ARMII::IndexModePost &&
550 "unexpected idxmode");
551 printAM3PreOrOffsetIndexOp(MI, Op, O, AlwaysPrintImm0);
554 void ARMInstPrinter::printAddrMode3OffsetOperand(const MCInst *MI,
557 const MCOperand &MO1 = MI->getOperand(OpNum);
558 const MCOperand &MO2 = MI->getOperand(OpNum+1);
561 O << getAddrOpcStr(ARM_AM::getAM3Op(MO2.getImm()));
562 printRegName(O, MO1.getReg());
566 unsigned ImmOffs = ARM_AM::getAM3Offset(MO2.getImm());
568 << '#' << ARM_AM::getAddrOpcStr(ARM_AM::getAM3Op(MO2.getImm())) << ImmOffs
572 void ARMInstPrinter::printPostIdxImm8Operand(const MCInst *MI,
575 const MCOperand &MO = MI->getOperand(OpNum);
576 unsigned Imm = MO.getImm();
578 << '#' << ((Imm & 256) ? "" : "-") << (Imm & 0xff)
582 void ARMInstPrinter::printPostIdxRegOperand(const MCInst *MI, unsigned OpNum,
584 const MCOperand &MO1 = MI->getOperand(OpNum);
585 const MCOperand &MO2 = MI->getOperand(OpNum+1);
587 O << (MO2.getImm() ? "" : "-");
588 printRegName(O, MO1.getReg());
591 void ARMInstPrinter::printPostIdxImm8s4Operand(const MCInst *MI,
594 const MCOperand &MO = MI->getOperand(OpNum);
595 unsigned Imm = MO.getImm();
597 << '#' << ((Imm & 256) ? "" : "-") << ((Imm & 0xff) << 2)
602 void ARMInstPrinter::printLdStmModeOperand(const MCInst *MI, unsigned OpNum,
604 ARM_AM::AMSubMode Mode = ARM_AM::getAM4SubMode(MI->getOperand(OpNum)
606 O << ARM_AM::getAMSubModeStr(Mode);
609 template <bool AlwaysPrintImm0>
610 void ARMInstPrinter::printAddrMode5Operand(const MCInst *MI, unsigned OpNum,
612 const MCOperand &MO1 = MI->getOperand(OpNum);
613 const MCOperand &MO2 = MI->getOperand(OpNum+1);
615 if (!MO1.isReg()) { // FIXME: This is for CP entries, but isn't right.
616 printOperand(MI, OpNum, O);
620 O << markup("<mem:") << "[";
621 printRegName(O, MO1.getReg());
623 unsigned ImmOffs = ARM_AM::getAM5Offset(MO2.getImm());
624 unsigned Op = ARM_AM::getAM5Op(MO2.getImm());
625 if (AlwaysPrintImm0 || ImmOffs || Op == ARM_AM::sub) {
629 << ARM_AM::getAddrOpcStr(ARM_AM::getAM5Op(MO2.getImm()))
633 O << "]" << markup(">");
636 void ARMInstPrinter::printAddrMode6Operand(const MCInst *MI, unsigned OpNum,
638 const MCOperand &MO1 = MI->getOperand(OpNum);
639 const MCOperand &MO2 = MI->getOperand(OpNum+1);
641 O << markup("<mem:") << "[";
642 printRegName(O, MO1.getReg());
644 O << ":" << (MO2.getImm() << 3);
646 O << "]" << markup(">");
649 void ARMInstPrinter::printAddrMode7Operand(const MCInst *MI, unsigned OpNum,
651 const MCOperand &MO1 = MI->getOperand(OpNum);
652 O << markup("<mem:") << "[";
653 printRegName(O, MO1.getReg());
654 O << "]" << markup(">");
657 void ARMInstPrinter::printAddrMode6OffsetOperand(const MCInst *MI,
660 const MCOperand &MO = MI->getOperand(OpNum);
661 if (MO.getReg() == 0)
665 printRegName(O, MO.getReg());
669 void ARMInstPrinter::printBitfieldInvMaskImmOperand(const MCInst *MI,
672 const MCOperand &MO = MI->getOperand(OpNum);
673 uint32_t v = ~MO.getImm();
674 int32_t lsb = countTrailingZeros(v);
675 int32_t width = (32 - countLeadingZeros (v)) - lsb;
676 assert(MO.isImm() && "Not a valid bf_inv_mask_imm value!");
677 O << markup("<imm:") << '#' << lsb << markup(">")
679 << markup("<imm:") << '#' << width << markup(">");
682 void ARMInstPrinter::printMemBOption(const MCInst *MI, unsigned OpNum,
684 unsigned val = MI->getOperand(OpNum).getImm();
685 O << ARM_MB::MemBOptToString(val, (getAvailableFeatures() & ARM::HasV8Ops));
688 void ARMInstPrinter::printInstSyncBOption(const MCInst *MI, unsigned OpNum,
690 unsigned val = MI->getOperand(OpNum).getImm();
691 O << ARM_ISB::InstSyncBOptToString(val);
694 void ARMInstPrinter::printShiftImmOperand(const MCInst *MI, unsigned OpNum,
696 unsigned ShiftOp = MI->getOperand(OpNum).getImm();
697 bool isASR = (ShiftOp & (1 << 5)) != 0;
698 unsigned Amt = ShiftOp & 0x1f;
702 << "#" << (Amt == 0 ? 32 : Amt)
713 void ARMInstPrinter::printPKHLSLShiftImm(const MCInst *MI, unsigned OpNum,
715 unsigned Imm = MI->getOperand(OpNum).getImm();
718 assert(Imm > 0 && Imm < 32 && "Invalid PKH shift immediate value!");
719 O << ", lsl " << markup("<imm:") << "#" << Imm << markup(">");
722 void ARMInstPrinter::printPKHASRShiftImm(const MCInst *MI, unsigned OpNum,
724 unsigned Imm = MI->getOperand(OpNum).getImm();
725 // A shift amount of 32 is encoded as 0.
728 assert(Imm > 0 && Imm <= 32 && "Invalid PKH shift immediate value!");
729 O << ", asr " << markup("<imm:") << "#" << Imm << markup(">");
732 void ARMInstPrinter::printRegisterList(const MCInst *MI, unsigned OpNum,
735 for (unsigned i = OpNum, e = MI->getNumOperands(); i != e; ++i) {
736 if (i != OpNum) O << ", ";
737 printRegName(O, MI->getOperand(i).getReg());
742 void ARMInstPrinter::printGPRPairOperand(const MCInst *MI, unsigned OpNum,
744 unsigned Reg = MI->getOperand(OpNum).getReg();
745 printRegName(O, MRI.getSubReg(Reg, ARM::gsub_0));
747 printRegName(O, MRI.getSubReg(Reg, ARM::gsub_1));
751 void ARMInstPrinter::printSetendOperand(const MCInst *MI, unsigned OpNum,
753 const MCOperand &Op = MI->getOperand(OpNum);
760 void ARMInstPrinter::printCPSIMod(const MCInst *MI, unsigned OpNum,
762 const MCOperand &Op = MI->getOperand(OpNum);
763 O << ARM_PROC::IModToString(Op.getImm());
766 void ARMInstPrinter::printCPSIFlag(const MCInst *MI, unsigned OpNum,
768 const MCOperand &Op = MI->getOperand(OpNum);
769 unsigned IFlags = Op.getImm();
770 for (int i=2; i >= 0; --i)
771 if (IFlags & (1 << i))
772 O << ARM_PROC::IFlagsToString(1 << i);
778 void ARMInstPrinter::printMSRMaskOperand(const MCInst *MI, unsigned OpNum,
780 const MCOperand &Op = MI->getOperand(OpNum);
781 unsigned SpecRegRBit = Op.getImm() >> 4;
782 unsigned Mask = Op.getImm() & 0xf;
783 uint64_t FeatureBits = getAvailableFeatures();
785 if (FeatureBits & ARM::FeatureMClass) {
786 unsigned SYSm = Op.getImm();
787 unsigned Opcode = MI->getOpcode();
789 // For writes, handle extended mask bits if the DSP extension is present.
790 if (Opcode == ARM::t2MSR_M && (FeatureBits & ARM::FeatureDSPThumb2)) {
792 case 0x400: O << "apsr_g"; return;
793 case 0xc00: O << "apsr_nzcvqg"; return;
794 case 0x401: O << "iapsr_g"; return;
795 case 0xc01: O << "iapsr_nzcvqg"; return;
796 case 0x402: O << "eapsr_g"; return;
797 case 0xc02: O << "eapsr_nzcvqg"; return;
798 case 0x403: O << "xpsr_g"; return;
799 case 0xc03: O << "xpsr_nzcvqg"; return;
803 // Handle the basic 8-bit mask.
806 if (Opcode == ARM::t2MSR_M && (FeatureBits & ARM::HasV7Ops)) {
807 // ARMv7-M deprecates using MSR APSR without a _<bits> qualifier as an
808 // alias for MSR APSR_nzcvq.
810 case 0: O << "apsr_nzcvq"; return;
811 case 1: O << "iapsr_nzcvq"; return;
812 case 2: O << "eapsr_nzcvq"; return;
813 case 3: O << "xpsr_nzcvq"; return;
818 default: llvm_unreachable("Unexpected mask value!");
819 case 0: O << "apsr"; return;
820 case 1: O << "iapsr"; return;
821 case 2: O << "eapsr"; return;
822 case 3: O << "xpsr"; return;
823 case 5: O << "ipsr"; return;
824 case 6: O << "epsr"; return;
825 case 7: O << "iepsr"; return;
826 case 8: O << "msp"; return;
827 case 9: O << "psp"; return;
828 case 16: O << "primask"; return;
829 case 17: O << "basepri"; return;
830 case 18: O << "basepri_max"; return;
831 case 19: O << "faultmask"; return;
832 case 20: O << "control"; return;
836 // As special cases, CPSR_f, CPSR_s and CPSR_fs prefer printing as
837 // APSR_nzcvq, APSR_g and APSRnzcvqg, respectively.
838 if (!SpecRegRBit && (Mask == 8 || Mask == 4 || Mask == 12)) {
841 default: llvm_unreachable("Unexpected mask value!");
842 case 4: O << "g"; return;
843 case 8: O << "nzcvq"; return;
844 case 12: O << "nzcvqg"; return;
855 if (Mask & 8) O << 'f';
856 if (Mask & 4) O << 's';
857 if (Mask & 2) O << 'x';
858 if (Mask & 1) O << 'c';
862 void ARMInstPrinter::printBankedRegOperand(const MCInst *MI, unsigned OpNum,
864 uint32_t Banked = MI->getOperand(OpNum).getImm();
865 uint32_t R = (Banked & 0x20) >> 5;
866 uint32_t SysM = Banked & 0x1f;
868 // Nothing much we can do about this, the encodings are specified in B9.2.3 of
869 // the ARM ARM v7C, and are all over the shop.
874 case 0x0e: O << "fiq"; return;
875 case 0x10: O << "irq"; return;
876 case 0x12: O << "svc"; return;
877 case 0x14: O << "abt"; return;
878 case 0x16: O << "und"; return;
879 case 0x1c: O << "mon"; return;
880 case 0x1e: O << "hyp"; return;
881 default: llvm_unreachable("Invalid banked SPSR register");
885 assert(!R && "should have dealt with SPSR regs");
886 const char *RegNames[] = {
887 "r8_usr", "r9_usr", "r10_usr", "r11_usr", "r12_usr", "sp_usr", "lr_usr", "",
888 "r8_fiq", "r9_fiq", "r10_fiq", "r11_fiq", "r12_fiq", "sp_fiq", "lr_fiq", "",
889 "lr_irq", "sp_irq", "lr_svc", "sp_svc", "lr_abt", "sp_abt", "lr_und", "sp_und",
890 "", "", "", "", "lr_mon", "sp_mon", "elr_hyp", "sp_hyp"
892 const char *Name = RegNames[SysM];
893 assert(Name[0] && "invalid banked register operand");
898 void ARMInstPrinter::printPredicateOperand(const MCInst *MI, unsigned OpNum,
900 ARMCC::CondCodes CC = (ARMCC::CondCodes)MI->getOperand(OpNum).getImm();
901 // Handle the undefined 15 CC value here for printing so we don't abort().
902 if ((unsigned)CC == 15)
904 else if (CC != ARMCC::AL)
905 O << ARMCondCodeToString(CC);
908 void ARMInstPrinter::printMandatoryPredicateOperand(const MCInst *MI,
911 ARMCC::CondCodes CC = (ARMCC::CondCodes)MI->getOperand(OpNum).getImm();
912 O << ARMCondCodeToString(CC);
915 void ARMInstPrinter::printSBitModifierOperand(const MCInst *MI, unsigned OpNum,
917 if (MI->getOperand(OpNum).getReg()) {
918 assert(MI->getOperand(OpNum).getReg() == ARM::CPSR &&
919 "Expect ARM CPSR register!");
924 void ARMInstPrinter::printNoHashImmediate(const MCInst *MI, unsigned OpNum,
926 O << MI->getOperand(OpNum).getImm();
929 void ARMInstPrinter::printPImmediate(const MCInst *MI, unsigned OpNum,
931 O << "p" << MI->getOperand(OpNum).getImm();
934 void ARMInstPrinter::printCImmediate(const MCInst *MI, unsigned OpNum,
936 O << "c" << MI->getOperand(OpNum).getImm();
939 void ARMInstPrinter::printCoprocOptionImm(const MCInst *MI, unsigned OpNum,
941 O << "{" << MI->getOperand(OpNum).getImm() << "}";
944 void ARMInstPrinter::printPCLabel(const MCInst *MI, unsigned OpNum,
946 llvm_unreachable("Unhandled PC-relative pseudo-instruction!");
949 template<unsigned scale>
950 void ARMInstPrinter::printAdrLabelOperand(const MCInst *MI, unsigned OpNum,
952 const MCOperand &MO = MI->getOperand(OpNum);
959 int32_t OffImm = (int32_t)MO.getImm() << scale;
961 O << markup("<imm:");
962 if (OffImm == INT32_MIN)
965 O << "#-" << -OffImm;
971 void ARMInstPrinter::printThumbS4ImmOperand(const MCInst *MI, unsigned OpNum,
974 << "#" << formatImm(MI->getOperand(OpNum).getImm() * 4)
978 void ARMInstPrinter::printThumbSRImm(const MCInst *MI, unsigned OpNum,
980 unsigned Imm = MI->getOperand(OpNum).getImm();
982 << "#" << formatImm((Imm == 0 ? 32 : Imm))
986 void ARMInstPrinter::printThumbITMask(const MCInst *MI, unsigned OpNum,
988 // (3 - the number of trailing zeros) is the number of then / else.
989 unsigned Mask = MI->getOperand(OpNum).getImm();
990 unsigned Firstcond = MI->getOperand(OpNum-1).getImm();
991 unsigned CondBit0 = Firstcond & 1;
992 unsigned NumTZ = countTrailingZeros(Mask);
993 assert(NumTZ <= 3 && "Invalid IT mask!");
994 for (unsigned Pos = 3, e = NumTZ; Pos > e; --Pos) {
995 bool T = ((Mask >> Pos) & 1) == CondBit0;
1003 void ARMInstPrinter::printThumbAddrModeRROperand(const MCInst *MI, unsigned Op,
1005 const MCOperand &MO1 = MI->getOperand(Op);
1006 const MCOperand &MO2 = MI->getOperand(Op + 1);
1008 if (!MO1.isReg()) { // FIXME: This is for CP entries, but isn't right.
1009 printOperand(MI, Op, O);
1013 O << markup("<mem:") << "[";
1014 printRegName(O, MO1.getReg());
1015 if (unsigned RegNum = MO2.getReg()) {
1017 printRegName(O, RegNum);
1019 O << "]" << markup(">");
1022 void ARMInstPrinter::printThumbAddrModeImm5SOperand(const MCInst *MI,
1026 const MCOperand &MO1 = MI->getOperand(Op);
1027 const MCOperand &MO2 = MI->getOperand(Op + 1);
1029 if (!MO1.isReg()) { // FIXME: This is for CP entries, but isn't right.
1030 printOperand(MI, Op, O);
1034 O << markup("<mem:") << "[";
1035 printRegName(O, MO1.getReg());
1036 if (unsigned ImmOffs = MO2.getImm()) {
1039 << "#" << formatImm(ImmOffs * Scale)
1042 O << "]" << markup(">");
1045 void ARMInstPrinter::printThumbAddrModeImm5S1Operand(const MCInst *MI,
1048 printThumbAddrModeImm5SOperand(MI, Op, O, 1);
1051 void ARMInstPrinter::printThumbAddrModeImm5S2Operand(const MCInst *MI,
1054 printThumbAddrModeImm5SOperand(MI, Op, O, 2);
1057 void ARMInstPrinter::printThumbAddrModeImm5S4Operand(const MCInst *MI,
1060 printThumbAddrModeImm5SOperand(MI, Op, O, 4);
1063 void ARMInstPrinter::printThumbAddrModeSPOperand(const MCInst *MI, unsigned Op,
1065 printThumbAddrModeImm5SOperand(MI, Op, O, 4);
1068 // Constant shifts t2_so_reg is a 2-operand unit corresponding to the Thumb2
1069 // register with shift forms.
1070 // REG 0 0 - e.g. R5
1071 // REG IMM, SH_OPC - e.g. R5, LSL #3
1072 void ARMInstPrinter::printT2SOOperand(const MCInst *MI, unsigned OpNum,
1074 const MCOperand &MO1 = MI->getOperand(OpNum);
1075 const MCOperand &MO2 = MI->getOperand(OpNum+1);
1077 unsigned Reg = MO1.getReg();
1078 printRegName(O, Reg);
1080 // Print the shift opc.
1081 assert(MO2.isImm() && "Not a valid t2_so_reg value!");
1082 printRegImmShift(O, ARM_AM::getSORegShOp(MO2.getImm()),
1083 ARM_AM::getSORegOffset(MO2.getImm()), UseMarkup);
1086 template <bool AlwaysPrintImm0>
1087 void ARMInstPrinter::printAddrModeImm12Operand(const MCInst *MI, unsigned OpNum,
1089 const MCOperand &MO1 = MI->getOperand(OpNum);
1090 const MCOperand &MO2 = MI->getOperand(OpNum+1);
1092 if (!MO1.isReg()) { // FIXME: This is for CP entries, but isn't right.
1093 printOperand(MI, OpNum, O);
1097 O << markup("<mem:") << "[";
1098 printRegName(O, MO1.getReg());
1100 int32_t OffImm = (int32_t)MO2.getImm();
1101 bool isSub = OffImm < 0;
1102 // Special value for #-0. All others are normal.
1103 if (OffImm == INT32_MIN)
1108 << "#-" << formatImm(-OffImm)
1111 else if (AlwaysPrintImm0 || OffImm > 0) {
1114 << "#" << formatImm(OffImm)
1117 O << "]" << markup(">");
1120 template<bool AlwaysPrintImm0>
1121 void ARMInstPrinter::printT2AddrModeImm8Operand(const MCInst *MI,
1124 const MCOperand &MO1 = MI->getOperand(OpNum);
1125 const MCOperand &MO2 = MI->getOperand(OpNum+1);
1127 O << markup("<mem:") << "[";
1128 printRegName(O, MO1.getReg());
1130 int32_t OffImm = (int32_t)MO2.getImm();
1131 bool isSub = OffImm < 0;
1133 if (OffImm == INT32_MIN)
1140 } else if (AlwaysPrintImm0 || OffImm > 0) {
1146 O << "]" << markup(">");
1149 template<bool AlwaysPrintImm0>
1150 void ARMInstPrinter::printT2AddrModeImm8s4Operand(const MCInst *MI,
1153 const MCOperand &MO1 = MI->getOperand(OpNum);
1154 const MCOperand &MO2 = MI->getOperand(OpNum+1);
1156 if (!MO1.isReg()) { // For label symbolic references.
1157 printOperand(MI, OpNum, O);
1161 O << markup("<mem:") << "[";
1162 printRegName(O, MO1.getReg());
1164 int32_t OffImm = (int32_t)MO2.getImm();
1165 bool isSub = OffImm < 0;
1167 assert(((OffImm & 0x3) == 0) && "Not a valid immediate!");
1170 if (OffImm == INT32_MIN)
1177 } else if (AlwaysPrintImm0 || OffImm > 0) {
1183 O << "]" << markup(">");
1186 void ARMInstPrinter::printT2AddrModeImm0_1020s4Operand(const MCInst *MI,
1189 const MCOperand &MO1 = MI->getOperand(OpNum);
1190 const MCOperand &MO2 = MI->getOperand(OpNum+1);
1192 O << markup("<mem:") << "[";
1193 printRegName(O, MO1.getReg());
1197 << "#" << formatImm(MO2.getImm() * 4)
1200 O << "]" << markup(">");
1203 void ARMInstPrinter::printT2AddrModeImm8OffsetOperand(const MCInst *MI,
1206 const MCOperand &MO1 = MI->getOperand(OpNum);
1207 int32_t OffImm = (int32_t)MO1.getImm();
1208 O << ", " << markup("<imm:");
1209 if (OffImm == INT32_MIN)
1211 else if (OffImm < 0)
1212 O << "#-" << -OffImm;
1218 void ARMInstPrinter::printT2AddrModeImm8s4OffsetOperand(const MCInst *MI,
1221 const MCOperand &MO1 = MI->getOperand(OpNum);
1222 int32_t OffImm = (int32_t)MO1.getImm();
1224 assert(((OffImm & 0x3) == 0) && "Not a valid immediate!");
1226 O << ", " << markup("<imm:");
1227 if (OffImm == INT32_MIN)
1229 else if (OffImm < 0)
1230 O << "#-" << -OffImm;
1236 void ARMInstPrinter::printT2AddrModeSoRegOperand(const MCInst *MI,
1239 const MCOperand &MO1 = MI->getOperand(OpNum);
1240 const MCOperand &MO2 = MI->getOperand(OpNum+1);
1241 const MCOperand &MO3 = MI->getOperand(OpNum+2);
1243 O << markup("<mem:") << "[";
1244 printRegName(O, MO1.getReg());
1246 assert(MO2.getReg() && "Invalid so_reg load / store address!");
1248 printRegName(O, MO2.getReg());
1250 unsigned ShAmt = MO3.getImm();
1252 assert(ShAmt <= 3 && "Not a valid Thumb2 addressing mode!");
1258 O << "]" << markup(">");
1261 void ARMInstPrinter::printFPImmOperand(const MCInst *MI, unsigned OpNum,
1263 const MCOperand &MO = MI->getOperand(OpNum);
1264 O << markup("<imm:")
1265 << '#' << ARM_AM::getFPImmFloat(MO.getImm())
1269 void ARMInstPrinter::printNEONModImmOperand(const MCInst *MI, unsigned OpNum,
1271 unsigned EncodedImm = MI->getOperand(OpNum).getImm();
1273 uint64_t Val = ARM_AM::decodeNEONModImm(EncodedImm, EltBits);
1274 O << markup("<imm:")
1280 void ARMInstPrinter::printImmPlusOneOperand(const MCInst *MI, unsigned OpNum,
1282 unsigned Imm = MI->getOperand(OpNum).getImm();
1283 O << markup("<imm:")
1284 << "#" << formatImm(Imm + 1)
1288 void ARMInstPrinter::printRotImmOperand(const MCInst *MI, unsigned OpNum,
1290 unsigned Imm = MI->getOperand(OpNum).getImm();
1297 default: assert (0 && "illegal ror immediate!");
1298 case 1: O << "8"; break;
1299 case 2: O << "16"; break;
1300 case 3: O << "24"; break;
1305 void ARMInstPrinter::printFBits16(const MCInst *MI, unsigned OpNum,
1307 O << markup("<imm:")
1308 << "#" << 16 - MI->getOperand(OpNum).getImm()
1312 void ARMInstPrinter::printFBits32(const MCInst *MI, unsigned OpNum,
1314 O << markup("<imm:")
1315 << "#" << 32 - MI->getOperand(OpNum).getImm()
1319 void ARMInstPrinter::printVectorIndex(const MCInst *MI, unsigned OpNum,
1321 O << "[" << MI->getOperand(OpNum).getImm() << "]";
1324 void ARMInstPrinter::printVectorListOne(const MCInst *MI, unsigned OpNum,
1327 printRegName(O, MI->getOperand(OpNum).getReg());
1331 void ARMInstPrinter::printVectorListTwo(const MCInst *MI, unsigned OpNum,
1333 unsigned Reg = MI->getOperand(OpNum).getReg();
1334 unsigned Reg0 = MRI.getSubReg(Reg, ARM::dsub_0);
1335 unsigned Reg1 = MRI.getSubReg(Reg, ARM::dsub_1);
1337 printRegName(O, Reg0);
1339 printRegName(O, Reg1);
1343 void ARMInstPrinter::printVectorListTwoSpaced(const MCInst *MI,
1346 unsigned Reg = MI->getOperand(OpNum).getReg();
1347 unsigned Reg0 = MRI.getSubReg(Reg, ARM::dsub_0);
1348 unsigned Reg1 = MRI.getSubReg(Reg, ARM::dsub_2);
1350 printRegName(O, Reg0);
1352 printRegName(O, Reg1);
1356 void ARMInstPrinter::printVectorListThree(const MCInst *MI, unsigned OpNum,
1358 // Normally, it's not safe to use register enum values directly with
1359 // addition to get the next register, but for VFP registers, the
1360 // sort order is guaranteed because they're all of the form D<n>.
1362 printRegName(O, MI->getOperand(OpNum).getReg());
1364 printRegName(O, MI->getOperand(OpNum).getReg() + 1);
1366 printRegName(O, MI->getOperand(OpNum).getReg() + 2);
1370 void ARMInstPrinter::printVectorListFour(const MCInst *MI, unsigned OpNum,
1372 // Normally, it's not safe to use register enum values directly with
1373 // addition to get the next register, but for VFP registers, the
1374 // sort order is guaranteed because they're all of the form D<n>.
1376 printRegName(O, MI->getOperand(OpNum).getReg());
1378 printRegName(O, MI->getOperand(OpNum).getReg() + 1);
1380 printRegName(O, MI->getOperand(OpNum).getReg() + 2);
1382 printRegName(O, MI->getOperand(OpNum).getReg() + 3);
1386 void ARMInstPrinter::printVectorListOneAllLanes(const MCInst *MI,
1390 printRegName(O, MI->getOperand(OpNum).getReg());
1394 void ARMInstPrinter::printVectorListTwoAllLanes(const MCInst *MI,
1397 unsigned Reg = MI->getOperand(OpNum).getReg();
1398 unsigned Reg0 = MRI.getSubReg(Reg, ARM::dsub_0);
1399 unsigned Reg1 = MRI.getSubReg(Reg, ARM::dsub_1);
1401 printRegName(O, Reg0);
1403 printRegName(O, Reg1);
1407 void ARMInstPrinter::printVectorListThreeAllLanes(const MCInst *MI,
1410 // Normally, it's not safe to use register enum values directly with
1411 // addition to get the next register, but for VFP registers, the
1412 // sort order is guaranteed because they're all of the form D<n>.
1414 printRegName(O, MI->getOperand(OpNum).getReg());
1416 printRegName(O, MI->getOperand(OpNum).getReg() + 1);
1418 printRegName(O, MI->getOperand(OpNum).getReg() + 2);
1422 void ARMInstPrinter::printVectorListFourAllLanes(const MCInst *MI,
1425 // Normally, it's not safe to use register enum values directly with
1426 // addition to get the next register, but for VFP registers, the
1427 // sort order is guaranteed because they're all of the form D<n>.
1429 printRegName(O, MI->getOperand(OpNum).getReg());
1431 printRegName(O, MI->getOperand(OpNum).getReg() + 1);
1433 printRegName(O, MI->getOperand(OpNum).getReg() + 2);
1435 printRegName(O, MI->getOperand(OpNum).getReg() + 3);
1439 void ARMInstPrinter::printVectorListTwoSpacedAllLanes(const MCInst *MI,
1442 unsigned Reg = MI->getOperand(OpNum).getReg();
1443 unsigned Reg0 = MRI.getSubReg(Reg, ARM::dsub_0);
1444 unsigned Reg1 = MRI.getSubReg(Reg, ARM::dsub_2);
1446 printRegName(O, Reg0);
1448 printRegName(O, Reg1);
1452 void ARMInstPrinter::printVectorListThreeSpacedAllLanes(const MCInst *MI,
1455 // Normally, it's not safe to use register enum values directly with
1456 // addition to get the next register, but for VFP registers, the
1457 // sort order is guaranteed because they're all of the form D<n>.
1459 printRegName(O, MI->getOperand(OpNum).getReg());
1461 printRegName(O, MI->getOperand(OpNum).getReg() + 2);
1463 printRegName(O, MI->getOperand(OpNum).getReg() + 4);
1467 void ARMInstPrinter::printVectorListFourSpacedAllLanes(const MCInst *MI,
1470 // Normally, it's not safe to use register enum values directly with
1471 // addition to get the next register, but for VFP registers, the
1472 // sort order is guaranteed because they're all of the form D<n>.
1474 printRegName(O, MI->getOperand(OpNum).getReg());
1476 printRegName(O, MI->getOperand(OpNum).getReg() + 2);
1478 printRegName(O, MI->getOperand(OpNum).getReg() + 4);
1480 printRegName(O, MI->getOperand(OpNum).getReg() + 6);
1484 void ARMInstPrinter::printVectorListThreeSpaced(const MCInst *MI,
1487 // Normally, it's not safe to use register enum values directly with
1488 // addition to get the next register, but for VFP registers, the
1489 // sort order is guaranteed because they're all of the form D<n>.
1491 printRegName(O, MI->getOperand(OpNum).getReg());
1493 printRegName(O, MI->getOperand(OpNum).getReg() + 2);
1495 printRegName(O, MI->getOperand(OpNum).getReg() + 4);
1499 void ARMInstPrinter::printVectorListFourSpaced(const MCInst *MI,
1502 // Normally, it's not safe to use register enum values directly with
1503 // addition to get the next register, but for VFP registers, the
1504 // sort order is guaranteed because they're all of the form D<n>.
1506 printRegName(O, MI->getOperand(OpNum).getReg());
1508 printRegName(O, MI->getOperand(OpNum).getReg() + 2);
1510 printRegName(O, MI->getOperand(OpNum).getReg() + 4);
1512 printRegName(O, MI->getOperand(OpNum).getReg() + 6);