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 #define DEBUG_TYPE "asm-printer"
15 #include "ARMInstPrinter.h"
16 #include "MCTargetDesc/ARMAddressingModes.h"
17 #include "MCTargetDesc/ARMBaseInfo.h"
18 #include "llvm/MC/MCAsmInfo.h"
19 #include "llvm/MC/MCExpr.h"
20 #include "llvm/MC/MCInst.h"
21 #include "llvm/MC/MCInstrInfo.h"
22 #include "llvm/MC/MCRegisterInfo.h"
23 #include "llvm/Support/raw_ostream.h"
26 #include "ARMGenAsmWriter.inc"
28 /// translateShiftImm - Convert shift immediate from 0-31 to 1-32 for printing.
30 /// getSORegOffset returns an integer from 0-31, representing '32' as 0.
31 static unsigned translateShiftImm(unsigned imm) {
32 // lsr #32 and asr #32 exist, but should be encoded as a 0.
33 assert((imm & ~0x1f) == 0 && "Invalid shift encoding");
40 /// Prints the shift value with an immediate value.
41 static void printRegImmShift(raw_ostream &O, ARM_AM::ShiftOpc ShOpc,
42 unsigned ShImm, bool UseMarkup) {
43 if (ShOpc == ARM_AM::no_shift || (ShOpc == ARM_AM::lsl && !ShImm))
47 assert (!(ShOpc == ARM_AM::ror && !ShImm) && "Cannot have ror #0");
48 O << getShiftOpcStr(ShOpc);
50 if (ShOpc != ARM_AM::rrx) {
54 O << "#" << translateShiftImm(ShImm);
60 ARMInstPrinter::ARMInstPrinter(const MCAsmInfo &MAI,
61 const MCInstrInfo &MII,
62 const MCRegisterInfo &MRI,
63 const MCSubtargetInfo &STI) :
64 MCInstPrinter(MAI, MII, MRI) {
65 // Initialize the set of available features.
66 setAvailableFeatures(STI.getFeatureBits());
69 void ARMInstPrinter::printRegName(raw_ostream &OS, unsigned RegNo) const {
71 << getRegisterName(RegNo)
75 void ARMInstPrinter::printInst(const MCInst *MI, raw_ostream &O,
77 unsigned Opcode = MI->getOpcode();
79 // Check for HINT instructions w/ canonical names.
80 if (Opcode == ARM::HINT || Opcode == ARM::t2HINT) {
81 switch (MI->getOperand(0).getImm()) {
82 case 0: O << "\tnop"; break;
83 case 1: O << "\tyield"; break;
84 case 2: O << "\twfe"; break;
85 case 3: O << "\twfi"; break;
86 case 4: O << "\tsev"; break;
88 // Anything else should just print normally.
89 printInstruction(MI, O);
90 printAnnotation(O, Annot);
93 printPredicateOperand(MI, 1, O);
94 if (Opcode == ARM::t2HINT)
96 printAnnotation(O, Annot);
100 // Check for MOVs and print canonical forms, instead.
101 if (Opcode == ARM::MOVsr) {
102 // FIXME: Thumb variants?
103 const MCOperand &Dst = MI->getOperand(0);
104 const MCOperand &MO1 = MI->getOperand(1);
105 const MCOperand &MO2 = MI->getOperand(2);
106 const MCOperand &MO3 = MI->getOperand(3);
108 O << '\t' << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(MO3.getImm()));
109 printSBitModifierOperand(MI, 6, O);
110 printPredicateOperand(MI, 4, O);
113 printRegName(O, Dst.getReg());
115 printRegName(O, MO1.getReg());
118 printRegName(O, MO2.getReg());
119 assert(ARM_AM::getSORegOffset(MO3.getImm()) == 0);
120 printAnnotation(O, Annot);
124 if (Opcode == ARM::MOVsi) {
125 // FIXME: Thumb variants?
126 const MCOperand &Dst = MI->getOperand(0);
127 const MCOperand &MO1 = MI->getOperand(1);
128 const MCOperand &MO2 = MI->getOperand(2);
130 O << '\t' << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(MO2.getImm()));
131 printSBitModifierOperand(MI, 5, O);
132 printPredicateOperand(MI, 3, O);
135 printRegName(O, Dst.getReg());
137 printRegName(O, MO1.getReg());
139 if (ARM_AM::getSORegShOp(MO2.getImm()) == ARM_AM::rrx) {
140 printAnnotation(O, Annot);
146 << "#" << translateShiftImm(ARM_AM::getSORegOffset(MO2.getImm()))
148 printAnnotation(O, Annot);
154 if ((Opcode == ARM::STMDB_UPD || Opcode == ARM::t2STMDB_UPD) &&
155 MI->getOperand(0).getReg() == ARM::SP &&
156 MI->getNumOperands() > 5) {
157 // Should only print PUSH if there are at least two registers in the list.
159 printPredicateOperand(MI, 2, O);
160 if (Opcode == ARM::t2STMDB_UPD)
163 printRegisterList(MI, 4, O);
164 printAnnotation(O, Annot);
167 if (Opcode == ARM::STR_PRE_IMM && MI->getOperand(2).getReg() == ARM::SP &&
168 MI->getOperand(3).getImm() == -4) {
170 printPredicateOperand(MI, 4, O);
172 printRegName(O, MI->getOperand(1).getReg());
174 printAnnotation(O, Annot);
179 if ((Opcode == ARM::LDMIA_UPD || Opcode == ARM::t2LDMIA_UPD) &&
180 MI->getOperand(0).getReg() == ARM::SP &&
181 MI->getNumOperands() > 5) {
182 // Should only print POP if there are at least two registers in the list.
184 printPredicateOperand(MI, 2, O);
185 if (Opcode == ARM::t2LDMIA_UPD)
188 printRegisterList(MI, 4, O);
189 printAnnotation(O, Annot);
192 if (Opcode == ARM::LDR_POST_IMM && MI->getOperand(2).getReg() == ARM::SP &&
193 MI->getOperand(4).getImm() == 4) {
195 printPredicateOperand(MI, 5, O);
197 printRegName(O, MI->getOperand(0).getReg());
199 printAnnotation(O, Annot);
205 if ((Opcode == ARM::VSTMSDB_UPD || Opcode == ARM::VSTMDDB_UPD) &&
206 MI->getOperand(0).getReg() == ARM::SP) {
207 O << '\t' << "vpush";
208 printPredicateOperand(MI, 2, O);
210 printRegisterList(MI, 4, O);
211 printAnnotation(O, Annot);
216 if ((Opcode == ARM::VLDMSIA_UPD || Opcode == ARM::VLDMDIA_UPD) &&
217 MI->getOperand(0).getReg() == ARM::SP) {
219 printPredicateOperand(MI, 2, O);
221 printRegisterList(MI, 4, O);
222 printAnnotation(O, Annot);
226 if (Opcode == ARM::tLDMIA) {
227 bool Writeback = true;
228 unsigned BaseReg = MI->getOperand(0).getReg();
229 for (unsigned i = 3; i < MI->getNumOperands(); ++i) {
230 if (MI->getOperand(i).getReg() == BaseReg)
236 printPredicateOperand(MI, 1, O);
238 printRegName(O, BaseReg);
239 if (Writeback) O << "!";
241 printRegisterList(MI, 3, O);
242 printAnnotation(O, Annot);
247 if (Opcode == ARM::tMOVr && MI->getOperand(0).getReg() == ARM::R8 &&
248 MI->getOperand(1).getReg() == ARM::R8) {
250 printPredicateOperand(MI, 2, O);
251 printAnnotation(O, Annot);
255 // Combine 2 GPRs from disassember into a GPRPair to match with instr def.
256 // ldrexd/strexd require even/odd GPR pair. To enforce this constraint,
257 // a single GPRPair reg operand is used in the .td file to replace the two
258 // GPRs. However, when decoding them, the two GRPs cannot be automatically
259 // expressed as a GPRPair, so we have to manually merge them.
260 // FIXME: We would really like to be able to tablegen'erate this.
261 if (Opcode == ARM::LDREXD || Opcode == ARM::STREXD) {
262 const MCRegisterClass& MRC = MRI.getRegClass(ARM::GPRRegClassID);
263 bool isStore = Opcode == ARM::STREXD;
264 unsigned Reg = MI->getOperand(isStore ? 1 : 0).getReg();
265 if (MRC.contains(Reg)) {
268 NewMI.setOpcode(Opcode);
271 NewMI.addOperand(MI->getOperand(0));
272 NewReg = MCOperand::CreateReg(MRI.getMatchingSuperReg(Reg, ARM::gsub_0,
273 &MRI.getRegClass(ARM::GPRPairRegClassID)));
274 NewMI.addOperand(NewReg);
276 // Copy the rest operands into NewMI.
277 for(unsigned i= isStore ? 3 : 2; i < MI->getNumOperands(); ++i)
278 NewMI.addOperand(MI->getOperand(i));
279 printInstruction(&NewMI, O);
284 printInstruction(MI, O);
285 printAnnotation(O, Annot);
288 void ARMInstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
290 const MCOperand &Op = MI->getOperand(OpNo);
292 unsigned Reg = Op.getReg();
293 printRegName(O, Reg);
294 } else if (Op.isImm()) {
296 << '#' << formatImm(Op.getImm())
299 assert(Op.isExpr() && "unknown operand kind in printOperand");
300 // If a symbolic branch target was added as a constant expression then print
301 // that address in hex. And only print 32 unsigned bits for the address.
302 const MCConstantExpr *BranchTarget = dyn_cast<MCConstantExpr>(Op.getExpr());
304 if (BranchTarget && BranchTarget->EvaluateAsAbsolute(Address)) {
306 O.write_hex((uint32_t)Address);
309 // Otherwise, just print the expression.
315 void ARMInstPrinter::printThumbLdrLabelOperand(const MCInst *MI, unsigned OpNum,
317 const MCOperand &MO1 = MI->getOperand(OpNum);
323 O << markup("<mem:") << "[pc, ";
325 int32_t OffImm = (int32_t)MO1.getImm();
326 bool isSub = OffImm < 0;
328 // Special value for #-0. All others are normal.
329 if (OffImm == INT32_MIN)
333 << "#-" << formatImm(-OffImm)
337 << "#" << formatImm(OffImm)
340 O << "]" << markup(">");
343 // so_reg is a 4-operand unit corresponding to register forms of the A5.1
344 // "Addressing Mode 1 - Data-processing operands" forms. This includes:
346 // REG REG 0,SH_OPC - e.g. R5, ROR R3
347 // REG 0 IMM,SH_OPC - e.g. R5, LSL #3
348 void ARMInstPrinter::printSORegRegOperand(const MCInst *MI, unsigned OpNum,
350 const MCOperand &MO1 = MI->getOperand(OpNum);
351 const MCOperand &MO2 = MI->getOperand(OpNum+1);
352 const MCOperand &MO3 = MI->getOperand(OpNum+2);
354 printRegName(O, MO1.getReg());
356 // Print the shift opc.
357 ARM_AM::ShiftOpc ShOpc = ARM_AM::getSORegShOp(MO3.getImm());
358 O << ", " << ARM_AM::getShiftOpcStr(ShOpc);
359 if (ShOpc == ARM_AM::rrx)
363 printRegName(O, MO2.getReg());
364 assert(ARM_AM::getSORegOffset(MO3.getImm()) == 0);
367 void ARMInstPrinter::printSORegImmOperand(const MCInst *MI, unsigned OpNum,
369 const MCOperand &MO1 = MI->getOperand(OpNum);
370 const MCOperand &MO2 = MI->getOperand(OpNum+1);
372 printRegName(O, MO1.getReg());
374 // Print the shift opc.
375 printRegImmShift(O, ARM_AM::getSORegShOp(MO2.getImm()),
376 ARM_AM::getSORegOffset(MO2.getImm()), UseMarkup);
380 //===--------------------------------------------------------------------===//
381 // Addressing Mode #2
382 //===--------------------------------------------------------------------===//
384 void ARMInstPrinter::printAM2PreOrOffsetIndexOp(const MCInst *MI, unsigned Op,
386 const MCOperand &MO1 = MI->getOperand(Op);
387 const MCOperand &MO2 = MI->getOperand(Op+1);
388 const MCOperand &MO3 = MI->getOperand(Op+2);
390 O << markup("<mem:") << "[";
391 printRegName(O, MO1.getReg());
394 if (ARM_AM::getAM2Offset(MO3.getImm())) { // Don't print +0.
398 << ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO3.getImm()))
399 << ARM_AM::getAM2Offset(MO3.getImm())
402 O << "]" << markup(">");
407 O << ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO3.getImm()));
408 printRegName(O, MO2.getReg());
410 printRegImmShift(O, ARM_AM::getAM2ShiftOpc(MO3.getImm()),
411 ARM_AM::getAM2Offset(MO3.getImm()), UseMarkup);
412 O << "]" << markup(">");
415 void ARMInstPrinter::printAddrModeTBB(const MCInst *MI, unsigned Op,
417 const MCOperand &MO1 = MI->getOperand(Op);
418 const MCOperand &MO2 = MI->getOperand(Op+1);
419 O << markup("<mem:") << "[";
420 printRegName(O, MO1.getReg());
422 printRegName(O, MO2.getReg());
423 O << "]" << markup(">");
426 void ARMInstPrinter::printAddrModeTBH(const MCInst *MI, unsigned Op,
428 const MCOperand &MO1 = MI->getOperand(Op);
429 const MCOperand &MO2 = MI->getOperand(Op+1);
430 O << markup("<mem:") << "[";
431 printRegName(O, MO1.getReg());
433 printRegName(O, MO2.getReg());
434 O << ", lsl " << markup("<imm:") << "#1" << markup(">") << "]" << markup(">");
437 void ARMInstPrinter::printAddrMode2Operand(const MCInst *MI, unsigned Op,
439 const MCOperand &MO1 = MI->getOperand(Op);
441 if (!MO1.isReg()) { // FIXME: This is for CP entries, but isn't right.
442 printOperand(MI, Op, O);
447 const MCOperand &MO3 = MI->getOperand(Op+2);
448 unsigned IdxMode = ARM_AM::getAM2IdxMode(MO3.getImm());
449 assert(IdxMode != ARMII::IndexModePost &&
450 "Should be pre or offset index op");
453 printAM2PreOrOffsetIndexOp(MI, Op, O);
456 void ARMInstPrinter::printAddrMode2OffsetOperand(const MCInst *MI,
459 const MCOperand &MO1 = MI->getOperand(OpNum);
460 const MCOperand &MO2 = MI->getOperand(OpNum+1);
463 unsigned ImmOffs = ARM_AM::getAM2Offset(MO2.getImm());
465 << '#' << ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO2.getImm()))
471 O << ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO2.getImm()));
472 printRegName(O, MO1.getReg());
474 printRegImmShift(O, ARM_AM::getAM2ShiftOpc(MO2.getImm()),
475 ARM_AM::getAM2Offset(MO2.getImm()), UseMarkup);
478 //===--------------------------------------------------------------------===//
479 // Addressing Mode #3
480 //===--------------------------------------------------------------------===//
482 void ARMInstPrinter::printAM3PostIndexOp(const MCInst *MI, unsigned Op,
484 const MCOperand &MO1 = MI->getOperand(Op);
485 const MCOperand &MO2 = MI->getOperand(Op+1);
486 const MCOperand &MO3 = MI->getOperand(Op+2);
488 O << markup("<mem:") << "[";
489 printRegName(O, MO1.getReg());
490 O << "], " << markup(">");
493 O << (char)ARM_AM::getAM3Op(MO3.getImm());
494 printRegName(O, MO2.getReg());
498 unsigned ImmOffs = ARM_AM::getAM3Offset(MO3.getImm());
501 << ARM_AM::getAddrOpcStr(ARM_AM::getAM3Op(MO3.getImm()))
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);
548 unsigned IdxMode = ARM_AM::getAM3IdxMode(MO3.getImm());
550 if (IdxMode == ARMII::IndexModePost) {
551 printAM3PostIndexOp(MI, Op, O);
554 printAM3PreOrOffsetIndexOp(MI, Op, O, AlwaysPrintImm0);
557 void ARMInstPrinter::printAddrMode3OffsetOperand(const MCInst *MI,
560 const MCOperand &MO1 = MI->getOperand(OpNum);
561 const MCOperand &MO2 = MI->getOperand(OpNum+1);
564 O << getAddrOpcStr(ARM_AM::getAM3Op(MO2.getImm()));
565 printRegName(O, MO1.getReg());
569 unsigned ImmOffs = ARM_AM::getAM3Offset(MO2.getImm());
571 << '#' << ARM_AM::getAddrOpcStr(ARM_AM::getAM3Op(MO2.getImm())) << ImmOffs
575 void ARMInstPrinter::printPostIdxImm8Operand(const MCInst *MI,
578 const MCOperand &MO = MI->getOperand(OpNum);
579 unsigned Imm = MO.getImm();
581 << '#' << ((Imm & 256) ? "" : "-") << (Imm & 0xff)
585 void ARMInstPrinter::printPostIdxRegOperand(const MCInst *MI, unsigned OpNum,
587 const MCOperand &MO1 = MI->getOperand(OpNum);
588 const MCOperand &MO2 = MI->getOperand(OpNum+1);
590 O << (MO2.getImm() ? "" : "-");
591 printRegName(O, MO1.getReg());
594 void ARMInstPrinter::printPostIdxImm8s4Operand(const MCInst *MI,
597 const MCOperand &MO = MI->getOperand(OpNum);
598 unsigned Imm = MO.getImm();
600 << '#' << ((Imm & 256) ? "" : "-") << ((Imm & 0xff) << 2)
605 void ARMInstPrinter::printLdStmModeOperand(const MCInst *MI, unsigned OpNum,
607 ARM_AM::AMSubMode Mode = ARM_AM::getAM4SubMode(MI->getOperand(OpNum)
609 O << ARM_AM::getAMSubModeStr(Mode);
612 template <bool AlwaysPrintImm0>
613 void ARMInstPrinter::printAddrMode5Operand(const MCInst *MI, unsigned OpNum,
615 const MCOperand &MO1 = MI->getOperand(OpNum);
616 const MCOperand &MO2 = MI->getOperand(OpNum+1);
618 if (!MO1.isReg()) { // FIXME: This is for CP entries, but isn't right.
619 printOperand(MI, OpNum, O);
623 O << markup("<mem:") << "[";
624 printRegName(O, MO1.getReg());
626 unsigned ImmOffs = ARM_AM::getAM5Offset(MO2.getImm());
627 unsigned Op = ARM_AM::getAM5Op(MO2.getImm());
628 if (AlwaysPrintImm0 || ImmOffs || Op == ARM_AM::sub) {
632 << ARM_AM::getAddrOpcStr(ARM_AM::getAM5Op(MO2.getImm()))
636 O << "]" << markup(">");
639 void ARMInstPrinter::printAddrMode6Operand(const MCInst *MI, unsigned OpNum,
641 const MCOperand &MO1 = MI->getOperand(OpNum);
642 const MCOperand &MO2 = MI->getOperand(OpNum+1);
644 O << markup("<mem:") << "[";
645 printRegName(O, MO1.getReg());
647 O << ":" << (MO2.getImm() << 3);
649 O << "]" << markup(">");
652 void ARMInstPrinter::printAddrMode7Operand(const MCInst *MI, unsigned OpNum,
654 const MCOperand &MO1 = MI->getOperand(OpNum);
655 O << markup("<mem:") << "[";
656 printRegName(O, MO1.getReg());
657 O << "]" << markup(">");
660 void ARMInstPrinter::printAddrMode6OffsetOperand(const MCInst *MI,
663 const MCOperand &MO = MI->getOperand(OpNum);
664 if (MO.getReg() == 0)
668 printRegName(O, MO.getReg());
672 void ARMInstPrinter::printBitfieldInvMaskImmOperand(const MCInst *MI,
675 const MCOperand &MO = MI->getOperand(OpNum);
676 uint32_t v = ~MO.getImm();
677 int32_t lsb = countTrailingZeros(v);
678 int32_t width = (32 - countLeadingZeros (v)) - lsb;
679 assert(MO.isImm() && "Not a valid bf_inv_mask_imm value!");
680 O << markup("<imm:") << '#' << lsb << markup(">")
682 << markup("<imm:") << '#' << width << markup(">");
685 void ARMInstPrinter::printMemBOption(const MCInst *MI, unsigned OpNum,
687 unsigned val = MI->getOperand(OpNum).getImm();
688 O << ARM_MB::MemBOptToString(val);
691 void ARMInstPrinter::printInstSyncBOption(const MCInst *MI, unsigned OpNum,
693 unsigned val = MI->getOperand(OpNum).getImm();
694 O << ARM_ISB::InstSyncBOptToString(val);
697 void ARMInstPrinter::printShiftImmOperand(const MCInst *MI, unsigned OpNum,
699 unsigned ShiftOp = MI->getOperand(OpNum).getImm();
700 bool isASR = (ShiftOp & (1 << 5)) != 0;
701 unsigned Amt = ShiftOp & 0x1f;
705 << "#" << (Amt == 0 ? 32 : Amt)
716 void ARMInstPrinter::printPKHLSLShiftImm(const MCInst *MI, unsigned OpNum,
718 unsigned Imm = MI->getOperand(OpNum).getImm();
721 assert(Imm > 0 && Imm < 32 && "Invalid PKH shift immediate value!");
722 O << ", lsl " << markup("<imm:") << "#" << Imm << markup(">");
725 void ARMInstPrinter::printPKHASRShiftImm(const MCInst *MI, unsigned OpNum,
727 unsigned Imm = MI->getOperand(OpNum).getImm();
728 // A shift amount of 32 is encoded as 0.
731 assert(Imm > 0 && Imm <= 32 && "Invalid PKH shift immediate value!");
732 O << ", asr " << markup("<imm:") << "#" << Imm << markup(">");
735 void ARMInstPrinter::printRegisterList(const MCInst *MI, unsigned OpNum,
738 for (unsigned i = OpNum, e = MI->getNumOperands(); i != e; ++i) {
739 if (i != OpNum) O << ", ";
740 printRegName(O, MI->getOperand(i).getReg());
745 void ARMInstPrinter::printGPRPairOperand(const MCInst *MI, unsigned OpNum,
747 unsigned Reg = MI->getOperand(OpNum).getReg();
748 printRegName(O, MRI.getSubReg(Reg, ARM::gsub_0));
750 printRegName(O, MRI.getSubReg(Reg, ARM::gsub_1));
754 void ARMInstPrinter::printSetendOperand(const MCInst *MI, unsigned OpNum,
756 const MCOperand &Op = MI->getOperand(OpNum);
763 void ARMInstPrinter::printCPSIMod(const MCInst *MI, unsigned OpNum,
765 const MCOperand &Op = MI->getOperand(OpNum);
766 O << ARM_PROC::IModToString(Op.getImm());
769 void ARMInstPrinter::printCPSIFlag(const MCInst *MI, unsigned OpNum,
771 const MCOperand &Op = MI->getOperand(OpNum);
772 unsigned IFlags = Op.getImm();
773 for (int i=2; i >= 0; --i)
774 if (IFlags & (1 << i))
775 O << ARM_PROC::IFlagsToString(1 << i);
781 void ARMInstPrinter::printMSRMaskOperand(const MCInst *MI, unsigned OpNum,
783 const MCOperand &Op = MI->getOperand(OpNum);
784 unsigned SpecRegRBit = Op.getImm() >> 4;
785 unsigned Mask = Op.getImm() & 0xf;
787 if (getAvailableFeatures() & ARM::FeatureMClass) {
788 unsigned SYSm = Op.getImm();
789 unsigned Opcode = MI->getOpcode();
790 // For reads of the special registers ignore the "mask encoding" bits
791 // which are only for writes.
792 if (Opcode == ARM::t2MRS_M)
795 default: llvm_unreachable("Unexpected mask value!");
797 case 0x800: O << "apsr"; return; // with _nzcvq bits is an alias for aspr
798 case 0x400: O << "apsr_g"; return;
799 case 0xc00: O << "apsr_nzcvqg"; return;
801 case 0x801: O << "iapsr"; return; // with _nzcvq bits is an alias for iapsr
802 case 0x401: O << "iapsr_g"; return;
803 case 0xc01: O << "iapsr_nzcvqg"; return;
805 case 0x802: O << "eapsr"; return; // with _nzcvq bits is an alias for eapsr
806 case 0x402: O << "eapsr_g"; return;
807 case 0xc02: O << "eapsr_nzcvqg"; return;
809 case 0x803: O << "xpsr"; return; // with _nzcvq bits is an alias for xpsr
810 case 0x403: O << "xpsr_g"; return;
811 case 0xc03: O << "xpsr_nzcvqg"; return;
813 case 0x805: O << "ipsr"; return;
815 case 0x806: O << "epsr"; return;
817 case 0x807: O << "iepsr"; return;
819 case 0x808: O << "msp"; return;
821 case 0x809: O << "psp"; return;
823 case 0x810: O << "primask"; return;
825 case 0x811: O << "basepri"; return;
827 case 0x812: O << "basepri_max"; return;
829 case 0x813: O << "faultmask"; return;
831 case 0x814: O << "control"; return;
835 // As special cases, CPSR_f, CPSR_s and CPSR_fs prefer printing as
836 // APSR_nzcvq, APSR_g and APSRnzcvqg, respectively.
837 if (!SpecRegRBit && (Mask == 8 || Mask == 4 || Mask == 12)) {
840 default: llvm_unreachable("Unexpected mask value!");
841 case 4: O << "g"; return;
842 case 8: O << "nzcvq"; return;
843 case 12: O << "nzcvqg"; return;
854 if (Mask & 8) O << 'f';
855 if (Mask & 4) O << 's';
856 if (Mask & 2) O << 'x';
857 if (Mask & 1) O << 'c';
861 void ARMInstPrinter::printPredicateOperand(const MCInst *MI, unsigned OpNum,
863 ARMCC::CondCodes CC = (ARMCC::CondCodes)MI->getOperand(OpNum).getImm();
864 // Handle the undefined 15 CC value here for printing so we don't abort().
865 if ((unsigned)CC == 15)
867 else if (CC != ARMCC::AL)
868 O << ARMCondCodeToString(CC);
871 void ARMInstPrinter::printMandatoryPredicateOperand(const MCInst *MI,
874 ARMCC::CondCodes CC = (ARMCC::CondCodes)MI->getOperand(OpNum).getImm();
875 O << ARMCondCodeToString(CC);
878 void ARMInstPrinter::printSBitModifierOperand(const MCInst *MI, unsigned OpNum,
880 if (MI->getOperand(OpNum).getReg()) {
881 assert(MI->getOperand(OpNum).getReg() == ARM::CPSR &&
882 "Expect ARM CPSR register!");
887 void ARMInstPrinter::printNoHashImmediate(const MCInst *MI, unsigned OpNum,
889 O << MI->getOperand(OpNum).getImm();
892 void ARMInstPrinter::printPImmediate(const MCInst *MI, unsigned OpNum,
894 O << "p" << MI->getOperand(OpNum).getImm();
897 void ARMInstPrinter::printCImmediate(const MCInst *MI, unsigned OpNum,
899 O << "c" << MI->getOperand(OpNum).getImm();
902 void ARMInstPrinter::printCoprocOptionImm(const MCInst *MI, unsigned OpNum,
904 O << "{" << MI->getOperand(OpNum).getImm() << "}";
907 void ARMInstPrinter::printPCLabel(const MCInst *MI, unsigned OpNum,
909 llvm_unreachable("Unhandled PC-relative pseudo-instruction!");
912 void ARMInstPrinter::printAdrLabelOperand(const MCInst *MI, unsigned OpNum,
914 const MCOperand &MO = MI->getOperand(OpNum);
921 int32_t OffImm = (int32_t)MO.getImm();
923 O << markup("<imm:");
924 if (OffImm == INT32_MIN)
927 O << "#-" << -OffImm;
933 void ARMInstPrinter::printThumbS4ImmOperand(const MCInst *MI, unsigned OpNum,
936 << "#" << formatImm(MI->getOperand(OpNum).getImm() * 4)
940 void ARMInstPrinter::printThumbSRImm(const MCInst *MI, unsigned OpNum,
942 unsigned Imm = MI->getOperand(OpNum).getImm();
944 << "#" << formatImm((Imm == 0 ? 32 : Imm))
948 void ARMInstPrinter::printThumbITMask(const MCInst *MI, unsigned OpNum,
950 // (3 - the number of trailing zeros) is the number of then / else.
951 unsigned Mask = MI->getOperand(OpNum).getImm();
952 unsigned Firstcond = MI->getOperand(OpNum-1).getImm();
953 unsigned CondBit0 = Firstcond & 1;
954 unsigned NumTZ = countTrailingZeros(Mask);
955 assert(NumTZ <= 3 && "Invalid IT mask!");
956 for (unsigned Pos = 3, e = NumTZ; Pos > e; --Pos) {
957 bool T = ((Mask >> Pos) & 1) == CondBit0;
965 void ARMInstPrinter::printThumbAddrModeRROperand(const MCInst *MI, unsigned Op,
967 const MCOperand &MO1 = MI->getOperand(Op);
968 const MCOperand &MO2 = MI->getOperand(Op + 1);
970 if (!MO1.isReg()) { // FIXME: This is for CP entries, but isn't right.
971 printOperand(MI, Op, O);
975 O << markup("<mem:") << "[";
976 printRegName(O, MO1.getReg());
977 if (unsigned RegNum = MO2.getReg()) {
979 printRegName(O, RegNum);
981 O << "]" << markup(">");
984 void ARMInstPrinter::printThumbAddrModeImm5SOperand(const MCInst *MI,
988 const MCOperand &MO1 = MI->getOperand(Op);
989 const MCOperand &MO2 = MI->getOperand(Op + 1);
991 if (!MO1.isReg()) { // FIXME: This is for CP entries, but isn't right.
992 printOperand(MI, Op, O);
996 O << markup("<mem:") << "[";
997 printRegName(O, MO1.getReg());
998 if (unsigned ImmOffs = MO2.getImm()) {
1001 << "#" << formatImm(ImmOffs * Scale)
1004 O << "]" << markup(">");
1007 void ARMInstPrinter::printThumbAddrModeImm5S1Operand(const MCInst *MI,
1010 printThumbAddrModeImm5SOperand(MI, Op, O, 1);
1013 void ARMInstPrinter::printThumbAddrModeImm5S2Operand(const MCInst *MI,
1016 printThumbAddrModeImm5SOperand(MI, Op, O, 2);
1019 void ARMInstPrinter::printThumbAddrModeImm5S4Operand(const MCInst *MI,
1022 printThumbAddrModeImm5SOperand(MI, Op, O, 4);
1025 void ARMInstPrinter::printThumbAddrModeSPOperand(const MCInst *MI, unsigned Op,
1027 printThumbAddrModeImm5SOperand(MI, Op, O, 4);
1030 // Constant shifts t2_so_reg is a 2-operand unit corresponding to the Thumb2
1031 // register with shift forms.
1032 // REG 0 0 - e.g. R5
1033 // REG IMM, SH_OPC - e.g. R5, LSL #3
1034 void ARMInstPrinter::printT2SOOperand(const MCInst *MI, unsigned OpNum,
1036 const MCOperand &MO1 = MI->getOperand(OpNum);
1037 const MCOperand &MO2 = MI->getOperand(OpNum+1);
1039 unsigned Reg = MO1.getReg();
1040 printRegName(O, Reg);
1042 // Print the shift opc.
1043 assert(MO2.isImm() && "Not a valid t2_so_reg value!");
1044 printRegImmShift(O, ARM_AM::getSORegShOp(MO2.getImm()),
1045 ARM_AM::getSORegOffset(MO2.getImm()), UseMarkup);
1048 template <bool AlwaysPrintImm0>
1049 void ARMInstPrinter::printAddrModeImm12Operand(const MCInst *MI, unsigned OpNum,
1051 const MCOperand &MO1 = MI->getOperand(OpNum);
1052 const MCOperand &MO2 = MI->getOperand(OpNum+1);
1054 if (!MO1.isReg()) { // FIXME: This is for CP entries, but isn't right.
1055 printOperand(MI, OpNum, O);
1059 O << markup("<mem:") << "[";
1060 printRegName(O, MO1.getReg());
1062 int32_t OffImm = (int32_t)MO2.getImm();
1063 bool isSub = OffImm < 0;
1064 // Special value for #-0. All others are normal.
1065 if (OffImm == INT32_MIN)
1073 else if (AlwaysPrintImm0 || OffImm > 0) {
1079 O << "]" << markup(">");
1082 void ARMInstPrinter::printT2AddrModeImm8Operand(const MCInst *MI,
1085 const MCOperand &MO1 = MI->getOperand(OpNum);
1086 const MCOperand &MO2 = MI->getOperand(OpNum+1);
1088 O << markup("<mem:") << "[";
1089 printRegName(O, MO1.getReg());
1091 int32_t OffImm = (int32_t)MO2.getImm();
1095 if (OffImm != 0 && UseMarkup)
1097 if (OffImm == INT32_MIN)
1099 else if (OffImm < 0)
1100 O << "#-" << -OffImm;
1101 else if (OffImm > 0)
1103 if (OffImm != 0 && UseMarkup)
1105 O << "]" << markup(">");
1108 void ARMInstPrinter::printT2AddrModeImm8s4Operand(const MCInst *MI,
1111 const MCOperand &MO1 = MI->getOperand(OpNum);
1112 const MCOperand &MO2 = MI->getOperand(OpNum+1);
1114 if (!MO1.isReg()) { // For label symbolic references.
1115 printOperand(MI, OpNum, O);
1119 O << markup("<mem:") << "[";
1120 printRegName(O, MO1.getReg());
1122 int32_t OffImm = (int32_t)MO2.getImm();
1124 assert(((OffImm & 0x3) == 0) && "Not a valid immediate!");
1129 if (OffImm != 0 && UseMarkup)
1131 if (OffImm == INT32_MIN)
1133 else if (OffImm < 0)
1134 O << "#-" << -OffImm;
1135 else if (OffImm > 0)
1137 if (OffImm != 0 && UseMarkup)
1139 O << "]" << markup(">");
1142 void ARMInstPrinter::printT2AddrModeImm0_1020s4Operand(const MCInst *MI,
1145 const MCOperand &MO1 = MI->getOperand(OpNum);
1146 const MCOperand &MO2 = MI->getOperand(OpNum+1);
1148 O << markup("<mem:") << "[";
1149 printRegName(O, MO1.getReg());
1153 << "#" << formatImm(MO2.getImm() * 4)
1156 O << "]" << markup(">");
1159 void ARMInstPrinter::printT2AddrModeImm8OffsetOperand(const MCInst *MI,
1162 const MCOperand &MO1 = MI->getOperand(OpNum);
1163 int32_t OffImm = (int32_t)MO1.getImm();
1164 O << ", " << markup("<imm:");
1165 if (OffImm == INT32_MIN)
1167 else if (OffImm < 0)
1168 O << "#-" << -OffImm;
1174 void ARMInstPrinter::printT2AddrModeImm8s4OffsetOperand(const MCInst *MI,
1177 const MCOperand &MO1 = MI->getOperand(OpNum);
1178 int32_t OffImm = (int32_t)MO1.getImm();
1180 assert(((OffImm & 0x3) == 0) && "Not a valid immediate!");
1185 if (OffImm != 0 && UseMarkup)
1187 if (OffImm == INT32_MIN)
1189 else if (OffImm < 0)
1190 O << "#-" << -OffImm;
1191 else if (OffImm > 0)
1193 if (OffImm != 0 && UseMarkup)
1197 void ARMInstPrinter::printT2AddrModeSoRegOperand(const MCInst *MI,
1200 const MCOperand &MO1 = MI->getOperand(OpNum);
1201 const MCOperand &MO2 = MI->getOperand(OpNum+1);
1202 const MCOperand &MO3 = MI->getOperand(OpNum+2);
1204 O << markup("<mem:") << "[";
1205 printRegName(O, MO1.getReg());
1207 assert(MO2.getReg() && "Invalid so_reg load / store address!");
1209 printRegName(O, MO2.getReg());
1211 unsigned ShAmt = MO3.getImm();
1213 assert(ShAmt <= 3 && "Not a valid Thumb2 addressing mode!");
1219 O << "]" << markup(">");
1222 void ARMInstPrinter::printFPImmOperand(const MCInst *MI, unsigned OpNum,
1224 const MCOperand &MO = MI->getOperand(OpNum);
1225 O << markup("<imm:")
1226 << '#' << ARM_AM::getFPImmFloat(MO.getImm())
1230 void ARMInstPrinter::printNEONModImmOperand(const MCInst *MI, unsigned OpNum,
1232 unsigned EncodedImm = MI->getOperand(OpNum).getImm();
1234 uint64_t Val = ARM_AM::decodeNEONModImm(EncodedImm, EltBits);
1235 O << markup("<imm:")
1241 void ARMInstPrinter::printImmPlusOneOperand(const MCInst *MI, unsigned OpNum,
1243 unsigned Imm = MI->getOperand(OpNum).getImm();
1244 O << markup("<imm:")
1245 << "#" << formatImm(Imm + 1)
1249 void ARMInstPrinter::printRotImmOperand(const MCInst *MI, unsigned OpNum,
1251 unsigned Imm = MI->getOperand(OpNum).getImm();
1258 default: assert (0 && "illegal ror immediate!");
1259 case 1: O << "8"; break;
1260 case 2: O << "16"; break;
1261 case 3: O << "24"; break;
1266 void ARMInstPrinter::printFBits16(const MCInst *MI, unsigned OpNum,
1268 O << markup("<imm:")
1269 << "#" << 16 - MI->getOperand(OpNum).getImm()
1273 void ARMInstPrinter::printFBits32(const MCInst *MI, unsigned OpNum,
1275 O << markup("<imm:")
1276 << "#" << 32 - MI->getOperand(OpNum).getImm()
1280 void ARMInstPrinter::printVectorIndex(const MCInst *MI, unsigned OpNum,
1282 O << "[" << MI->getOperand(OpNum).getImm() << "]";
1285 void ARMInstPrinter::printVectorListOne(const MCInst *MI, unsigned OpNum,
1288 printRegName(O, MI->getOperand(OpNum).getReg());
1292 void ARMInstPrinter::printVectorListTwo(const MCInst *MI, unsigned OpNum,
1294 unsigned Reg = MI->getOperand(OpNum).getReg();
1295 unsigned Reg0 = MRI.getSubReg(Reg, ARM::dsub_0);
1296 unsigned Reg1 = MRI.getSubReg(Reg, ARM::dsub_1);
1298 printRegName(O, Reg0);
1300 printRegName(O, Reg1);
1304 void ARMInstPrinter::printVectorListTwoSpaced(const MCInst *MI,
1307 unsigned Reg = MI->getOperand(OpNum).getReg();
1308 unsigned Reg0 = MRI.getSubReg(Reg, ARM::dsub_0);
1309 unsigned Reg1 = MRI.getSubReg(Reg, ARM::dsub_2);
1311 printRegName(O, Reg0);
1313 printRegName(O, Reg1);
1317 void ARMInstPrinter::printVectorListThree(const MCInst *MI, unsigned OpNum,
1319 // Normally, it's not safe to use register enum values directly with
1320 // addition to get the next register, but for VFP registers, the
1321 // sort order is guaranteed because they're all of the form D<n>.
1323 printRegName(O, MI->getOperand(OpNum).getReg());
1325 printRegName(O, MI->getOperand(OpNum).getReg() + 1);
1327 printRegName(O, MI->getOperand(OpNum).getReg() + 2);
1331 void ARMInstPrinter::printVectorListFour(const MCInst *MI, unsigned OpNum,
1333 // Normally, it's not safe to use register enum values directly with
1334 // addition to get the next register, but for VFP registers, the
1335 // sort order is guaranteed because they're all of the form D<n>.
1337 printRegName(O, MI->getOperand(OpNum).getReg());
1339 printRegName(O, MI->getOperand(OpNum).getReg() + 1);
1341 printRegName(O, MI->getOperand(OpNum).getReg() + 2);
1343 printRegName(O, MI->getOperand(OpNum).getReg() + 3);
1347 void ARMInstPrinter::printVectorListOneAllLanes(const MCInst *MI,
1351 printRegName(O, MI->getOperand(OpNum).getReg());
1355 void ARMInstPrinter::printVectorListTwoAllLanes(const MCInst *MI,
1358 unsigned Reg = MI->getOperand(OpNum).getReg();
1359 unsigned Reg0 = MRI.getSubReg(Reg, ARM::dsub_0);
1360 unsigned Reg1 = MRI.getSubReg(Reg, ARM::dsub_1);
1362 printRegName(O, Reg0);
1364 printRegName(O, Reg1);
1368 void ARMInstPrinter::printVectorListThreeAllLanes(const MCInst *MI,
1371 // Normally, it's not safe to use register enum values directly with
1372 // addition to get the next register, but for VFP registers, the
1373 // sort order is guaranteed because they're all of the form D<n>.
1375 printRegName(O, MI->getOperand(OpNum).getReg());
1377 printRegName(O, MI->getOperand(OpNum).getReg() + 1);
1379 printRegName(O, MI->getOperand(OpNum).getReg() + 2);
1383 void ARMInstPrinter::printVectorListFourAllLanes(const MCInst *MI,
1386 // Normally, it's not safe to use register enum values directly with
1387 // addition to get the next register, but for VFP registers, the
1388 // sort order is guaranteed because they're all of the form D<n>.
1390 printRegName(O, MI->getOperand(OpNum).getReg());
1392 printRegName(O, MI->getOperand(OpNum).getReg() + 1);
1394 printRegName(O, MI->getOperand(OpNum).getReg() + 2);
1396 printRegName(O, MI->getOperand(OpNum).getReg() + 3);
1400 void ARMInstPrinter::printVectorListTwoSpacedAllLanes(const MCInst *MI,
1403 unsigned Reg = MI->getOperand(OpNum).getReg();
1404 unsigned Reg0 = MRI.getSubReg(Reg, ARM::dsub_0);
1405 unsigned Reg1 = MRI.getSubReg(Reg, ARM::dsub_2);
1407 printRegName(O, Reg0);
1409 printRegName(O, Reg1);
1413 void ARMInstPrinter::printVectorListThreeSpacedAllLanes(const MCInst *MI,
1416 // Normally, it's not safe to use register enum values directly with
1417 // addition to get the next register, but for VFP registers, the
1418 // sort order is guaranteed because they're all of the form D<n>.
1420 printRegName(O, MI->getOperand(OpNum).getReg());
1422 printRegName(O, MI->getOperand(OpNum).getReg() + 2);
1424 printRegName(O, MI->getOperand(OpNum).getReg() + 4);
1428 void ARMInstPrinter::printVectorListFourSpacedAllLanes(const MCInst *MI,
1431 // Normally, it's not safe to use register enum values directly with
1432 // addition to get the next register, but for VFP registers, the
1433 // sort order is guaranteed because they're all of the form D<n>.
1435 printRegName(O, MI->getOperand(OpNum).getReg());
1437 printRegName(O, MI->getOperand(OpNum).getReg() + 2);
1439 printRegName(O, MI->getOperand(OpNum).getReg() + 4);
1441 printRegName(O, MI->getOperand(OpNum).getReg() + 6);
1445 void ARMInstPrinter::printVectorListThreeSpaced(const MCInst *MI,
1448 // Normally, it's not safe to use register enum values directly with
1449 // addition to get the next register, but for VFP registers, the
1450 // sort order is guaranteed because they're all of the form D<n>.
1452 printRegName(O, MI->getOperand(OpNum).getReg());
1454 printRegName(O, MI->getOperand(OpNum).getReg() + 2);
1456 printRegName(O, MI->getOperand(OpNum).getReg() + 4);
1460 void ARMInstPrinter::printVectorListFourSpaced(const MCInst *MI,
1463 // Normally, it's not safe to use register enum values directly with
1464 // addition to get the next register, but for VFP registers, the
1465 // sort order is guaranteed because they're all of the form D<n>.
1467 printRegName(O, MI->getOperand(OpNum).getReg());
1469 printRegName(O, MI->getOperand(OpNum).getReg() + 2);
1471 printRegName(O, MI->getOperand(OpNum).getReg() + 4);
1473 printRegName(O, MI->getOperand(OpNum).getReg() + 6);