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/ARMBaseInfo.h"
17 #include "MCTargetDesc/ARMAddressingModes.h"
18 #include "llvm/MC/MCInst.h"
19 #include "llvm/MC/MCAsmInfo.h"
20 #include "llvm/MC/MCExpr.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,
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)
51 O << " #" << translateShiftImm(ShImm);
54 ARMInstPrinter::ARMInstPrinter(const MCAsmInfo &MAI,
55 const MCInstrInfo &MII,
56 const MCRegisterInfo &MRI,
57 const MCSubtargetInfo &STI) :
58 MCInstPrinter(MAI, MII, MRI) {
59 // Initialize the set of available features.
60 setAvailableFeatures(STI.getFeatureBits());
63 void ARMInstPrinter::printRegName(raw_ostream &OS, unsigned RegNo) const {
64 OS << getRegisterName(RegNo);
67 void ARMInstPrinter::printInst(const MCInst *MI, raw_ostream &O,
69 unsigned Opcode = MI->getOpcode();
71 // Check for HINT instructions w/ canonical names.
72 if (Opcode == ARM::HINT || Opcode == ARM::t2HINT) {
73 switch (MI->getOperand(0).getImm()) {
74 case 0: O << "\tnop"; break;
75 case 1: O << "\tyield"; break;
76 case 2: O << "\twfe"; break;
77 case 3: O << "\twfi"; break;
78 case 4: O << "\tsev"; break;
80 // Anything else should just print normally.
81 printInstruction(MI, O);
82 printAnnotation(O, Annot);
85 printPredicateOperand(MI, 1, O);
86 if (Opcode == ARM::t2HINT)
88 printAnnotation(O, Annot);
92 // Check for MOVs and print canonical forms, instead.
93 if (Opcode == ARM::MOVsr) {
94 // FIXME: Thumb variants?
95 const MCOperand &Dst = MI->getOperand(0);
96 const MCOperand &MO1 = MI->getOperand(1);
97 const MCOperand &MO2 = MI->getOperand(2);
98 const MCOperand &MO3 = MI->getOperand(3);
100 O << '\t' << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(MO3.getImm()));
101 printSBitModifierOperand(MI, 6, O);
102 printPredicateOperand(MI, 4, O);
104 O << '\t' << getRegisterName(Dst.getReg())
105 << ", " << getRegisterName(MO1.getReg());
107 O << ", " << getRegisterName(MO2.getReg());
108 assert(ARM_AM::getSORegOffset(MO3.getImm()) == 0);
109 printAnnotation(O, Annot);
113 if (Opcode == ARM::MOVsi) {
114 // FIXME: Thumb variants?
115 const MCOperand &Dst = MI->getOperand(0);
116 const MCOperand &MO1 = MI->getOperand(1);
117 const MCOperand &MO2 = MI->getOperand(2);
119 O << '\t' << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(MO2.getImm()));
120 printSBitModifierOperand(MI, 5, O);
121 printPredicateOperand(MI, 3, O);
123 O << '\t' << getRegisterName(Dst.getReg())
124 << ", " << getRegisterName(MO1.getReg());
126 if (ARM_AM::getSORegShOp(MO2.getImm()) == ARM_AM::rrx) {
127 printAnnotation(O, Annot);
131 O << ", #" << translateShiftImm(ARM_AM::getSORegOffset(MO2.getImm()));
132 printAnnotation(O, Annot);
138 if ((Opcode == ARM::STMDB_UPD || Opcode == ARM::t2STMDB_UPD) &&
139 MI->getOperand(0).getReg() == ARM::SP &&
140 MI->getNumOperands() > 5) {
141 // Should only print PUSH if there are at least two registers in the list.
143 printPredicateOperand(MI, 2, O);
144 if (Opcode == ARM::t2STMDB_UPD)
147 printRegisterList(MI, 4, O);
148 printAnnotation(O, Annot);
151 if (Opcode == ARM::STR_PRE_IMM && MI->getOperand(2).getReg() == ARM::SP &&
152 MI->getOperand(3).getImm() == -4) {
154 printPredicateOperand(MI, 4, O);
155 O << "\t{" << getRegisterName(MI->getOperand(1).getReg()) << "}";
156 printAnnotation(O, Annot);
161 if ((Opcode == ARM::LDMIA_UPD || Opcode == ARM::t2LDMIA_UPD) &&
162 MI->getOperand(0).getReg() == ARM::SP &&
163 MI->getNumOperands() > 5) {
164 // Should only print POP if there are at least two registers in the list.
166 printPredicateOperand(MI, 2, O);
167 if (Opcode == ARM::t2LDMIA_UPD)
170 printRegisterList(MI, 4, O);
171 printAnnotation(O, Annot);
174 if (Opcode == ARM::LDR_POST_IMM && MI->getOperand(2).getReg() == ARM::SP &&
175 MI->getOperand(4).getImm() == 4) {
177 printPredicateOperand(MI, 5, O);
178 O << "\t{" << getRegisterName(MI->getOperand(0).getReg()) << "}";
179 printAnnotation(O, Annot);
185 if ((Opcode == ARM::VSTMSDB_UPD || Opcode == ARM::VSTMDDB_UPD) &&
186 MI->getOperand(0).getReg() == ARM::SP) {
187 O << '\t' << "vpush";
188 printPredicateOperand(MI, 2, O);
190 printRegisterList(MI, 4, O);
191 printAnnotation(O, Annot);
196 if ((Opcode == ARM::VLDMSIA_UPD || Opcode == ARM::VLDMDIA_UPD) &&
197 MI->getOperand(0).getReg() == ARM::SP) {
199 printPredicateOperand(MI, 2, O);
201 printRegisterList(MI, 4, O);
202 printAnnotation(O, Annot);
206 if (Opcode == ARM::tLDMIA) {
207 bool Writeback = true;
208 unsigned BaseReg = MI->getOperand(0).getReg();
209 for (unsigned i = 3; i < MI->getNumOperands(); ++i) {
210 if (MI->getOperand(i).getReg() == BaseReg)
216 printPredicateOperand(MI, 1, O);
217 O << '\t' << getRegisterName(BaseReg);
218 if (Writeback) O << "!";
220 printRegisterList(MI, 3, O);
221 printAnnotation(O, Annot);
226 if (Opcode == ARM::tMOVr && MI->getOperand(0).getReg() == ARM::R8 &&
227 MI->getOperand(1).getReg() == ARM::R8) {
229 printPredicateOperand(MI, 2, O);
230 printAnnotation(O, Annot);
234 printInstruction(MI, O);
235 printAnnotation(O, Annot);
238 void ARMInstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
240 const MCOperand &Op = MI->getOperand(OpNo);
242 unsigned Reg = Op.getReg();
243 O << getRegisterName(Reg);
244 } else if (Op.isImm()) {
245 O << '#' << Op.getImm();
247 assert(Op.isExpr() && "unknown operand kind in printOperand");
248 // If a symbolic branch target was added as a constant expression then print
249 // that address in hex. And only print 32 unsigned bits for the address.
250 const MCConstantExpr *BranchTarget = dyn_cast<MCConstantExpr>(Op.getExpr());
252 if (BranchTarget && BranchTarget->EvaluateAsAbsolute(Address)) {
254 O.write_hex((uint32_t)Address);
257 // Otherwise, just print the expression.
263 void ARMInstPrinter::printT2LdrLabelOperand(const MCInst *MI, unsigned OpNum,
265 const MCOperand &MO1 = MI->getOperand(OpNum);
268 else if (MO1.isImm())
269 O << "[pc, #" << MO1.getImm() << "]";
271 llvm_unreachable("Unknown LDR label operand?");
274 // so_reg is a 4-operand unit corresponding to register forms of the A5.1
275 // "Addressing Mode 1 - Data-processing operands" forms. This includes:
277 // REG REG 0,SH_OPC - e.g. R5, ROR R3
278 // REG 0 IMM,SH_OPC - e.g. R5, LSL #3
279 void ARMInstPrinter::printSORegRegOperand(const MCInst *MI, unsigned OpNum,
281 const MCOperand &MO1 = MI->getOperand(OpNum);
282 const MCOperand &MO2 = MI->getOperand(OpNum+1);
283 const MCOperand &MO3 = MI->getOperand(OpNum+2);
285 O << getRegisterName(MO1.getReg());
287 // Print the shift opc.
288 ARM_AM::ShiftOpc ShOpc = ARM_AM::getSORegShOp(MO3.getImm());
289 O << ", " << ARM_AM::getShiftOpcStr(ShOpc);
290 if (ShOpc == ARM_AM::rrx)
293 O << ' ' << getRegisterName(MO2.getReg());
294 assert(ARM_AM::getSORegOffset(MO3.getImm()) == 0);
297 void ARMInstPrinter::printSORegImmOperand(const MCInst *MI, unsigned OpNum,
299 const MCOperand &MO1 = MI->getOperand(OpNum);
300 const MCOperand &MO2 = MI->getOperand(OpNum+1);
302 O << getRegisterName(MO1.getReg());
304 // Print the shift opc.
305 printRegImmShift(O, ARM_AM::getSORegShOp(MO2.getImm()),
306 ARM_AM::getSORegOffset(MO2.getImm()));
310 //===--------------------------------------------------------------------===//
311 // Addressing Mode #2
312 //===--------------------------------------------------------------------===//
314 void ARMInstPrinter::printAM2PreOrOffsetIndexOp(const MCInst *MI, unsigned Op,
316 const MCOperand &MO1 = MI->getOperand(Op);
317 const MCOperand &MO2 = MI->getOperand(Op+1);
318 const MCOperand &MO3 = MI->getOperand(Op+2);
320 O << "[" << getRegisterName(MO1.getReg());
323 if (ARM_AM::getAM2Offset(MO3.getImm())) // Don't print +0.
325 << ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO3.getImm()))
326 << ARM_AM::getAM2Offset(MO3.getImm());
332 << ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO3.getImm()))
333 << getRegisterName(MO2.getReg());
335 printRegImmShift(O, ARM_AM::getAM2ShiftOpc(MO3.getImm()),
336 ARM_AM::getAM2Offset(MO3.getImm()));
340 void ARMInstPrinter::printAddrModeTBB(const MCInst *MI, unsigned Op,
342 const MCOperand &MO1 = MI->getOperand(Op);
343 const MCOperand &MO2 = MI->getOperand(Op+1);
344 O << "[" << getRegisterName(MO1.getReg()) << ", "
345 << getRegisterName(MO2.getReg()) << "]";
348 void ARMInstPrinter::printAddrModeTBH(const MCInst *MI, unsigned Op,
350 const MCOperand &MO1 = MI->getOperand(Op);
351 const MCOperand &MO2 = MI->getOperand(Op+1);
352 O << "[" << getRegisterName(MO1.getReg()) << ", "
353 << getRegisterName(MO2.getReg()) << ", lsl #1]";
356 void ARMInstPrinter::printAddrMode2Operand(const MCInst *MI, unsigned Op,
358 const MCOperand &MO1 = MI->getOperand(Op);
360 if (!MO1.isReg()) { // FIXME: This is for CP entries, but isn't right.
361 printOperand(MI, Op, O);
366 const MCOperand &MO3 = MI->getOperand(Op+2);
367 unsigned IdxMode = ARM_AM::getAM2IdxMode(MO3.getImm());
368 assert(IdxMode != ARMII::IndexModePost &&
369 "Should be pre or offset index op");
372 printAM2PreOrOffsetIndexOp(MI, Op, O);
375 void ARMInstPrinter::printAddrMode2OffsetOperand(const MCInst *MI,
378 const MCOperand &MO1 = MI->getOperand(OpNum);
379 const MCOperand &MO2 = MI->getOperand(OpNum+1);
382 unsigned ImmOffs = ARM_AM::getAM2Offset(MO2.getImm());
384 << ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO2.getImm()))
389 O << ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO2.getImm()))
390 << getRegisterName(MO1.getReg());
392 printRegImmShift(O, ARM_AM::getAM2ShiftOpc(MO2.getImm()),
393 ARM_AM::getAM2Offset(MO2.getImm()));
396 //===--------------------------------------------------------------------===//
397 // Addressing Mode #3
398 //===--------------------------------------------------------------------===//
400 void ARMInstPrinter::printAM3PostIndexOp(const MCInst *MI, unsigned Op,
402 const MCOperand &MO1 = MI->getOperand(Op);
403 const MCOperand &MO2 = MI->getOperand(Op+1);
404 const MCOperand &MO3 = MI->getOperand(Op+2);
406 O << "[" << getRegisterName(MO1.getReg()) << "], ";
409 O << (char)ARM_AM::getAM3Op(MO3.getImm())
410 << getRegisterName(MO2.getReg());
414 unsigned ImmOffs = ARM_AM::getAM3Offset(MO3.getImm());
416 << ARM_AM::getAddrOpcStr(ARM_AM::getAM3Op(MO3.getImm()))
420 void ARMInstPrinter::printAM3PreOrOffsetIndexOp(const MCInst *MI, unsigned Op,
422 const MCOperand &MO1 = MI->getOperand(Op);
423 const MCOperand &MO2 = MI->getOperand(Op+1);
424 const MCOperand &MO3 = MI->getOperand(Op+2);
426 O << '[' << getRegisterName(MO1.getReg());
429 O << ", " << getAddrOpcStr(ARM_AM::getAM3Op(MO3.getImm()))
430 << getRegisterName(MO2.getReg()) << ']';
434 //If the op is sub we have to print the immediate even if it is 0
435 unsigned ImmOffs = ARM_AM::getAM3Offset(MO3.getImm());
436 ARM_AM::AddrOpc op = ARM_AM::getAM3Op(MO3.getImm());
438 if (ImmOffs || (op == ARM_AM::sub))
440 << ARM_AM::getAddrOpcStr(op)
445 void ARMInstPrinter::printAddrMode3Operand(const MCInst *MI, unsigned Op,
447 const MCOperand &MO1 = MI->getOperand(Op);
448 if (!MO1.isReg()) { // For label symbolic references.
449 printOperand(MI, Op, O);
453 const MCOperand &MO3 = MI->getOperand(Op+2);
454 unsigned IdxMode = ARM_AM::getAM3IdxMode(MO3.getImm());
456 if (IdxMode == ARMII::IndexModePost) {
457 printAM3PostIndexOp(MI, Op, O);
460 printAM3PreOrOffsetIndexOp(MI, Op, O);
463 void ARMInstPrinter::printAddrMode3OffsetOperand(const MCInst *MI,
466 const MCOperand &MO1 = MI->getOperand(OpNum);
467 const MCOperand &MO2 = MI->getOperand(OpNum+1);
470 O << getAddrOpcStr(ARM_AM::getAM3Op(MO2.getImm()))
471 << getRegisterName(MO1.getReg());
475 unsigned ImmOffs = ARM_AM::getAM3Offset(MO2.getImm());
477 << ARM_AM::getAddrOpcStr(ARM_AM::getAM3Op(MO2.getImm()))
481 void ARMInstPrinter::printPostIdxImm8Operand(const MCInst *MI,
484 const MCOperand &MO = MI->getOperand(OpNum);
485 unsigned Imm = MO.getImm();
486 O << '#' << ((Imm & 256) ? "" : "-") << (Imm & 0xff);
489 void ARMInstPrinter::printPostIdxRegOperand(const MCInst *MI, unsigned OpNum,
491 const MCOperand &MO1 = MI->getOperand(OpNum);
492 const MCOperand &MO2 = MI->getOperand(OpNum+1);
494 O << (MO2.getImm() ? "" : "-") << getRegisterName(MO1.getReg());
497 void ARMInstPrinter::printPostIdxImm8s4Operand(const MCInst *MI,
500 const MCOperand &MO = MI->getOperand(OpNum);
501 unsigned Imm = MO.getImm();
502 O << '#' << ((Imm & 256) ? "" : "-") << ((Imm & 0xff) << 2);
506 void ARMInstPrinter::printLdStmModeOperand(const MCInst *MI, unsigned OpNum,
508 ARM_AM::AMSubMode Mode = ARM_AM::getAM4SubMode(MI->getOperand(OpNum)
510 O << ARM_AM::getAMSubModeStr(Mode);
513 void ARMInstPrinter::printAddrMode5Operand(const MCInst *MI, unsigned OpNum,
515 const MCOperand &MO1 = MI->getOperand(OpNum);
516 const MCOperand &MO2 = MI->getOperand(OpNum+1);
518 if (!MO1.isReg()) { // FIXME: This is for CP entries, but isn't right.
519 printOperand(MI, OpNum, O);
523 O << "[" << getRegisterName(MO1.getReg());
525 unsigned ImmOffs = ARM_AM::getAM5Offset(MO2.getImm());
526 unsigned Op = ARM_AM::getAM5Op(MO2.getImm());
527 if (ImmOffs || Op == ARM_AM::sub) {
529 << ARM_AM::getAddrOpcStr(ARM_AM::getAM5Op(MO2.getImm()))
535 void ARMInstPrinter::printAddrMode6Operand(const MCInst *MI, unsigned OpNum,
537 const MCOperand &MO1 = MI->getOperand(OpNum);
538 const MCOperand &MO2 = MI->getOperand(OpNum+1);
540 O << "[" << getRegisterName(MO1.getReg());
542 // FIXME: Both darwin as and GNU as violate ARM docs here.
543 O << ", :" << (MO2.getImm() << 3);
548 void ARMInstPrinter::printAddrMode7Operand(const MCInst *MI, unsigned OpNum,
550 const MCOperand &MO1 = MI->getOperand(OpNum);
551 O << "[" << getRegisterName(MO1.getReg()) << "]";
554 void ARMInstPrinter::printAddrMode6OffsetOperand(const MCInst *MI,
557 const MCOperand &MO = MI->getOperand(OpNum);
558 if (MO.getReg() == 0)
561 O << ", " << getRegisterName(MO.getReg());
564 void ARMInstPrinter::printBitfieldInvMaskImmOperand(const MCInst *MI,
567 const MCOperand &MO = MI->getOperand(OpNum);
568 uint32_t v = ~MO.getImm();
569 int32_t lsb = CountTrailingZeros_32(v);
570 int32_t width = (32 - CountLeadingZeros_32 (v)) - lsb;
571 assert(MO.isImm() && "Not a valid bf_inv_mask_imm value!");
572 O << '#' << lsb << ", #" << width;
575 void ARMInstPrinter::printMemBOption(const MCInst *MI, unsigned OpNum,
577 unsigned val = MI->getOperand(OpNum).getImm();
578 O << ARM_MB::MemBOptToString(val);
581 void ARMInstPrinter::printShiftImmOperand(const MCInst *MI, unsigned OpNum,
583 unsigned ShiftOp = MI->getOperand(OpNum).getImm();
584 bool isASR = (ShiftOp & (1 << 5)) != 0;
585 unsigned Amt = ShiftOp & 0x1f;
587 O << ", asr #" << (Amt == 0 ? 32 : Amt);
589 O << ", lsl #" << Amt;
592 void ARMInstPrinter::printPKHLSLShiftImm(const MCInst *MI, unsigned OpNum,
594 unsigned Imm = MI->getOperand(OpNum).getImm();
597 assert(Imm > 0 && Imm < 32 && "Invalid PKH shift immediate value!");
598 O << ", lsl #" << Imm;
601 void ARMInstPrinter::printPKHASRShiftImm(const MCInst *MI, unsigned OpNum,
603 unsigned Imm = MI->getOperand(OpNum).getImm();
604 // A shift amount of 32 is encoded as 0.
607 assert(Imm > 0 && Imm <= 32 && "Invalid PKH shift immediate value!");
608 O << ", asr #" << Imm;
611 void ARMInstPrinter::printRegisterList(const MCInst *MI, unsigned OpNum,
614 for (unsigned i = OpNum, e = MI->getNumOperands(); i != e; ++i) {
615 if (i != OpNum) O << ", ";
616 O << getRegisterName(MI->getOperand(i).getReg());
621 void ARMInstPrinter::printSetendOperand(const MCInst *MI, unsigned OpNum,
623 const MCOperand &Op = MI->getOperand(OpNum);
630 void ARMInstPrinter::printCPSIMod(const MCInst *MI, unsigned OpNum,
632 const MCOperand &Op = MI->getOperand(OpNum);
633 O << ARM_PROC::IModToString(Op.getImm());
636 void ARMInstPrinter::printCPSIFlag(const MCInst *MI, unsigned OpNum,
638 const MCOperand &Op = MI->getOperand(OpNum);
639 unsigned IFlags = Op.getImm();
640 for (int i=2; i >= 0; --i)
641 if (IFlags & (1 << i))
642 O << ARM_PROC::IFlagsToString(1 << i);
648 void ARMInstPrinter::printMSRMaskOperand(const MCInst *MI, unsigned OpNum,
650 const MCOperand &Op = MI->getOperand(OpNum);
651 unsigned SpecRegRBit = Op.getImm() >> 4;
652 unsigned Mask = Op.getImm() & 0xf;
654 if (getAvailableFeatures() & ARM::FeatureMClass) {
655 unsigned SYSm = Op.getImm();
656 unsigned Opcode = MI->getOpcode();
657 // For reads of the special registers ignore the "mask encoding" bits
658 // which are only for writes.
659 if (Opcode == ARM::t2MRS_M)
662 default: llvm_unreachable("Unexpected mask value!");
664 case 0x800: O << "apsr"; return; // with _nzcvq bits is an alias for aspr
665 case 0x400: O << "apsr_g"; return;
666 case 0xc00: O << "apsr_nzcvqg"; return;
668 case 0x801: O << "iapsr"; return; // with _nzcvq bits is an alias for iapsr
669 case 0x401: O << "iapsr_g"; return;
670 case 0xc01: O << "iapsr_nzcvqg"; return;
672 case 0x802: O << "eapsr"; return; // with _nzcvq bits is an alias for eapsr
673 case 0x402: O << "eapsr_g"; return;
674 case 0xc02: O << "eapsr_nzcvqg"; return;
676 case 0x803: O << "xpsr"; return; // with _nzcvq bits is an alias for xpsr
677 case 0x403: O << "xpsr_g"; return;
678 case 0xc03: O << "xpsr_nzcvqg"; return;
680 case 0x805: O << "ipsr"; return;
682 case 0x806: O << "epsr"; return;
684 case 0x807: O << "iepsr"; return;
686 case 0x808: O << "msp"; return;
688 case 0x809: O << "psp"; return;
690 case 0x810: O << "primask"; return;
692 case 0x811: O << "basepri"; return;
694 case 0x812: O << "basepri_max"; return;
696 case 0x813: O << "faultmask"; return;
698 case 0x814: O << "control"; return;
702 // As special cases, CPSR_f, CPSR_s and CPSR_fs prefer printing as
703 // APSR_nzcvq, APSR_g and APSRnzcvqg, respectively.
704 if (!SpecRegRBit && (Mask == 8 || Mask == 4 || Mask == 12)) {
707 default: llvm_unreachable("Unexpected mask value!");
708 case 4: O << "g"; return;
709 case 8: O << "nzcvq"; return;
710 case 12: O << "nzcvqg"; return;
721 if (Mask & 8) O << 'f';
722 if (Mask & 4) O << 's';
723 if (Mask & 2) O << 'x';
724 if (Mask & 1) O << 'c';
728 void ARMInstPrinter::printPredicateOperand(const MCInst *MI, unsigned OpNum,
730 ARMCC::CondCodes CC = (ARMCC::CondCodes)MI->getOperand(OpNum).getImm();
731 // Handle the undefined 15 CC value here for printing so we don't abort().
732 if ((unsigned)CC == 15)
734 else if (CC != ARMCC::AL)
735 O << ARMCondCodeToString(CC);
738 void ARMInstPrinter::printMandatoryPredicateOperand(const MCInst *MI,
741 ARMCC::CondCodes CC = (ARMCC::CondCodes)MI->getOperand(OpNum).getImm();
742 O << ARMCondCodeToString(CC);
745 void ARMInstPrinter::printSBitModifierOperand(const MCInst *MI, unsigned OpNum,
747 if (MI->getOperand(OpNum).getReg()) {
748 assert(MI->getOperand(OpNum).getReg() == ARM::CPSR &&
749 "Expect ARM CPSR register!");
754 void ARMInstPrinter::printNoHashImmediate(const MCInst *MI, unsigned OpNum,
756 O << MI->getOperand(OpNum).getImm();
759 void ARMInstPrinter::printPImmediate(const MCInst *MI, unsigned OpNum,
761 O << "p" << MI->getOperand(OpNum).getImm();
764 void ARMInstPrinter::printCImmediate(const MCInst *MI, unsigned OpNum,
766 O << "c" << MI->getOperand(OpNum).getImm();
769 void ARMInstPrinter::printCoprocOptionImm(const MCInst *MI, unsigned OpNum,
771 O << "{" << MI->getOperand(OpNum).getImm() << "}";
774 void ARMInstPrinter::printPCLabel(const MCInst *MI, unsigned OpNum,
776 llvm_unreachable("Unhandled PC-relative pseudo-instruction!");
779 void ARMInstPrinter::printAdrLabelOperand(const MCInst *MI, unsigned OpNum,
781 const MCOperand &MO = MI->getOperand(OpNum);
788 int32_t OffImm = (int32_t)MO.getImm();
790 if (OffImm == INT32_MIN)
793 O << "#-" << -OffImm;
798 void ARMInstPrinter::printThumbS4ImmOperand(const MCInst *MI, unsigned OpNum,
800 O << "#" << MI->getOperand(OpNum).getImm() * 4;
803 void ARMInstPrinter::printThumbSRImm(const MCInst *MI, unsigned OpNum,
805 unsigned Imm = MI->getOperand(OpNum).getImm();
806 O << "#" << (Imm == 0 ? 32 : Imm);
809 void ARMInstPrinter::printThumbITMask(const MCInst *MI, unsigned OpNum,
811 // (3 - the number of trailing zeros) is the number of then / else.
812 unsigned Mask = MI->getOperand(OpNum).getImm();
813 unsigned Firstcond = MI->getOperand(OpNum-1).getImm();
814 unsigned CondBit0 = Firstcond & 1;
815 unsigned NumTZ = CountTrailingZeros_32(Mask);
816 assert(NumTZ <= 3 && "Invalid IT mask!");
817 for (unsigned Pos = 3, e = NumTZ; Pos > e; --Pos) {
818 bool T = ((Mask >> Pos) & 1) == CondBit0;
826 void ARMInstPrinter::printThumbAddrModeRROperand(const MCInst *MI, unsigned Op,
828 const MCOperand &MO1 = MI->getOperand(Op);
829 const MCOperand &MO2 = MI->getOperand(Op + 1);
831 if (!MO1.isReg()) { // FIXME: This is for CP entries, but isn't right.
832 printOperand(MI, Op, O);
836 O << "[" << getRegisterName(MO1.getReg());
837 if (unsigned RegNum = MO2.getReg())
838 O << ", " << getRegisterName(RegNum);
842 void ARMInstPrinter::printThumbAddrModeImm5SOperand(const MCInst *MI,
846 const MCOperand &MO1 = MI->getOperand(Op);
847 const MCOperand &MO2 = MI->getOperand(Op + 1);
849 if (!MO1.isReg()) { // FIXME: This is for CP entries, but isn't right.
850 printOperand(MI, Op, O);
854 O << "[" << getRegisterName(MO1.getReg());
855 if (unsigned ImmOffs = MO2.getImm())
856 O << ", #" << ImmOffs * Scale;
860 void ARMInstPrinter::printThumbAddrModeImm5S1Operand(const MCInst *MI,
863 printThumbAddrModeImm5SOperand(MI, Op, O, 1);
866 void ARMInstPrinter::printThumbAddrModeImm5S2Operand(const MCInst *MI,
869 printThumbAddrModeImm5SOperand(MI, Op, O, 2);
872 void ARMInstPrinter::printThumbAddrModeImm5S4Operand(const MCInst *MI,
875 printThumbAddrModeImm5SOperand(MI, Op, O, 4);
878 void ARMInstPrinter::printThumbAddrModeSPOperand(const MCInst *MI, unsigned Op,
880 printThumbAddrModeImm5SOperand(MI, Op, O, 4);
883 // Constant shifts t2_so_reg is a 2-operand unit corresponding to the Thumb2
884 // register with shift forms.
886 // REG IMM, SH_OPC - e.g. R5, LSL #3
887 void ARMInstPrinter::printT2SOOperand(const MCInst *MI, unsigned OpNum,
889 const MCOperand &MO1 = MI->getOperand(OpNum);
890 const MCOperand &MO2 = MI->getOperand(OpNum+1);
892 unsigned Reg = MO1.getReg();
893 O << getRegisterName(Reg);
895 // Print the shift opc.
896 assert(MO2.isImm() && "Not a valid t2_so_reg value!");
897 printRegImmShift(O, ARM_AM::getSORegShOp(MO2.getImm()),
898 ARM_AM::getSORegOffset(MO2.getImm()));
901 void ARMInstPrinter::printAddrModeImm12Operand(const MCInst *MI, unsigned OpNum,
903 const MCOperand &MO1 = MI->getOperand(OpNum);
904 const MCOperand &MO2 = MI->getOperand(OpNum+1);
906 if (!MO1.isReg()) { // FIXME: This is for CP entries, but isn't right.
907 printOperand(MI, OpNum, O);
911 O << "[" << getRegisterName(MO1.getReg());
913 int32_t OffImm = (int32_t)MO2.getImm();
914 bool isSub = OffImm < 0;
915 // Special value for #-0. All others are normal.
916 if (OffImm == INT32_MIN)
919 O << ", #-" << -OffImm;
921 O << ", #" << OffImm;
925 void ARMInstPrinter::printT2AddrModeImm8Operand(const MCInst *MI,
928 const MCOperand &MO1 = MI->getOperand(OpNum);
929 const MCOperand &MO2 = MI->getOperand(OpNum+1);
931 O << "[" << getRegisterName(MO1.getReg());
933 int32_t OffImm = (int32_t)MO2.getImm();
935 if (OffImm == INT32_MIN)
938 O << ", #-" << -OffImm;
940 O << ", #" << OffImm;
944 void ARMInstPrinter::printT2AddrModeImm8s4Operand(const MCInst *MI,
947 const MCOperand &MO1 = MI->getOperand(OpNum);
948 const MCOperand &MO2 = MI->getOperand(OpNum+1);
950 if (!MO1.isReg()) { // For label symbolic references.
951 printOperand(MI, OpNum, O);
955 O << "[" << getRegisterName(MO1.getReg());
957 int32_t OffImm = (int32_t)MO2.getImm();
959 assert(((OffImm & 0x3) == 0) && "Not a valid immediate!");
962 if (OffImm == INT32_MIN)
965 O << ", #-" << -OffImm;
967 O << ", #" << OffImm;
971 void ARMInstPrinter::printT2AddrModeImm0_1020s4Operand(const MCInst *MI,
974 const MCOperand &MO1 = MI->getOperand(OpNum);
975 const MCOperand &MO2 = MI->getOperand(OpNum+1);
977 O << "[" << getRegisterName(MO1.getReg());
979 O << ", #" << MO2.getImm() * 4;
983 void ARMInstPrinter::printT2AddrModeImm8OffsetOperand(const MCInst *MI,
986 const MCOperand &MO1 = MI->getOperand(OpNum);
987 int32_t OffImm = (int32_t)MO1.getImm();
990 O << ", #-" << -OffImm;
992 O << ", #" << OffImm;
995 void ARMInstPrinter::printT2AddrModeImm8s4OffsetOperand(const MCInst *MI,
998 const MCOperand &MO1 = MI->getOperand(OpNum);
999 int32_t OffImm = (int32_t)MO1.getImm();
1001 assert(((OffImm & 0x3) == 0) && "Not a valid immediate!");
1004 if (OffImm == INT32_MIN)
1006 else if (OffImm < 0)
1007 O << ", #-" << -OffImm;
1008 else if (OffImm > 0)
1009 O << ", #" << OffImm;
1012 void ARMInstPrinter::printT2AddrModeSoRegOperand(const MCInst *MI,
1015 const MCOperand &MO1 = MI->getOperand(OpNum);
1016 const MCOperand &MO2 = MI->getOperand(OpNum+1);
1017 const MCOperand &MO3 = MI->getOperand(OpNum+2);
1019 O << "[" << getRegisterName(MO1.getReg());
1021 assert(MO2.getReg() && "Invalid so_reg load / store address!");
1022 O << ", " << getRegisterName(MO2.getReg());
1024 unsigned ShAmt = MO3.getImm();
1026 assert(ShAmt <= 3 && "Not a valid Thumb2 addressing mode!");
1027 O << ", lsl #" << ShAmt;
1032 void ARMInstPrinter::printFPImmOperand(const MCInst *MI, unsigned OpNum,
1034 const MCOperand &MO = MI->getOperand(OpNum);
1035 O << '#' << ARM_AM::getFPImmFloat(MO.getImm());
1038 void ARMInstPrinter::printNEONModImmOperand(const MCInst *MI, unsigned OpNum,
1040 unsigned EncodedImm = MI->getOperand(OpNum).getImm();
1042 uint64_t Val = ARM_AM::decodeNEONModImm(EncodedImm, EltBits);
1047 void ARMInstPrinter::printImmPlusOneOperand(const MCInst *MI, unsigned OpNum,
1049 unsigned Imm = MI->getOperand(OpNum).getImm();
1050 O << "#" << Imm + 1;
1053 void ARMInstPrinter::printRotImmOperand(const MCInst *MI, unsigned OpNum,
1055 unsigned Imm = MI->getOperand(OpNum).getImm();
1060 default: assert (0 && "illegal ror immediate!");
1061 case 1: O << "8"; break;
1062 case 2: O << "16"; break;
1063 case 3: O << "24"; break;
1067 void ARMInstPrinter::printFBits16(const MCInst *MI, unsigned OpNum,
1069 O << "#" << 16 - MI->getOperand(OpNum).getImm();
1072 void ARMInstPrinter::printFBits32(const MCInst *MI, unsigned OpNum,
1074 O << "#" << 32 - MI->getOperand(OpNum).getImm();
1077 void ARMInstPrinter::printVectorIndex(const MCInst *MI, unsigned OpNum,
1079 O << "[" << MI->getOperand(OpNum).getImm() << "]";
1082 void ARMInstPrinter::printVectorListOne(const MCInst *MI, unsigned OpNum,
1084 O << "{" << getRegisterName(MI->getOperand(OpNum).getReg()) << "}";
1087 void ARMInstPrinter::printVectorListTwo(const MCInst *MI, unsigned OpNum,
1089 unsigned Reg = MI->getOperand(OpNum).getReg();
1090 unsigned Reg0 = MRI.getSubReg(Reg, ARM::dsub_0);
1091 unsigned Reg1 = MRI.getSubReg(Reg, ARM::dsub_1);
1092 O << "{" << getRegisterName(Reg0) << ", " << getRegisterName(Reg1) << "}";
1095 void ARMInstPrinter::printVectorListTwoSpaced(const MCInst *MI,
1098 unsigned Reg = MI->getOperand(OpNum).getReg();
1099 unsigned Reg0 = MRI.getSubReg(Reg, ARM::dsub_0);
1100 unsigned Reg1 = MRI.getSubReg(Reg, ARM::dsub_2);
1101 O << "{" << getRegisterName(Reg0) << ", " << getRegisterName(Reg1) << "}";
1104 void ARMInstPrinter::printVectorListThree(const MCInst *MI, unsigned OpNum,
1106 // Normally, it's not safe to use register enum values directly with
1107 // addition to get the next register, but for VFP registers, the
1108 // sort order is guaranteed because they're all of the form D<n>.
1109 O << "{" << getRegisterName(MI->getOperand(OpNum).getReg()) << ", "
1110 << getRegisterName(MI->getOperand(OpNum).getReg() + 1) << ", "
1111 << getRegisterName(MI->getOperand(OpNum).getReg() + 2) << "}";
1114 void ARMInstPrinter::printVectorListFour(const MCInst *MI, unsigned OpNum,
1116 // Normally, it's not safe to use register enum values directly with
1117 // addition to get the next register, but for VFP registers, the
1118 // sort order is guaranteed because they're all of the form D<n>.
1119 O << "{" << getRegisterName(MI->getOperand(OpNum).getReg()) << ", "
1120 << getRegisterName(MI->getOperand(OpNum).getReg() + 1) << ", "
1121 << getRegisterName(MI->getOperand(OpNum).getReg() + 2) << ", "
1122 << getRegisterName(MI->getOperand(OpNum).getReg() + 3) << "}";
1125 void ARMInstPrinter::printVectorListOneAllLanes(const MCInst *MI,
1128 O << "{" << getRegisterName(MI->getOperand(OpNum).getReg()) << "[]}";
1131 void ARMInstPrinter::printVectorListTwoAllLanes(const MCInst *MI,
1134 unsigned Reg = MI->getOperand(OpNum).getReg();
1135 unsigned Reg0 = MRI.getSubReg(Reg, ARM::dsub_0);
1136 unsigned Reg1 = MRI.getSubReg(Reg, ARM::dsub_1);
1137 O << "{" << getRegisterName(Reg0) << "[], " << getRegisterName(Reg1) << "[]}";
1140 void ARMInstPrinter::printVectorListThreeAllLanes(const MCInst *MI,
1143 // Normally, it's not safe to use register enum values directly with
1144 // addition to get the next register, but for VFP registers, the
1145 // sort order is guaranteed because they're all of the form D<n>.
1146 O << "{" << getRegisterName(MI->getOperand(OpNum).getReg()) << "[], "
1147 << getRegisterName(MI->getOperand(OpNum).getReg() + 1) << "[], "
1148 << getRegisterName(MI->getOperand(OpNum).getReg() + 2) << "[]}";
1151 void ARMInstPrinter::printVectorListFourAllLanes(const MCInst *MI,
1154 // Normally, it's not safe to use register enum values directly with
1155 // addition to get the next register, but for VFP registers, the
1156 // sort order is guaranteed because they're all of the form D<n>.
1157 O << "{" << getRegisterName(MI->getOperand(OpNum).getReg()) << "[], "
1158 << getRegisterName(MI->getOperand(OpNum).getReg() + 1) << "[], "
1159 << getRegisterName(MI->getOperand(OpNum).getReg() + 2) << "[], "
1160 << getRegisterName(MI->getOperand(OpNum).getReg() + 3) << "[]}";
1163 void ARMInstPrinter::printVectorListTwoSpacedAllLanes(const MCInst *MI,
1166 unsigned Reg = MI->getOperand(OpNum).getReg();
1167 unsigned Reg0 = MRI.getSubReg(Reg, ARM::dsub_0);
1168 unsigned Reg1 = MRI.getSubReg(Reg, ARM::dsub_2);
1169 O << "{" << getRegisterName(Reg0) << "[], " << getRegisterName(Reg1) << "[]}";
1172 void ARMInstPrinter::printVectorListThreeSpacedAllLanes(const MCInst *MI,
1175 // Normally, it's not safe to use register enum values directly with
1176 // addition to get the next register, but for VFP registers, the
1177 // sort order is guaranteed because they're all of the form D<n>.
1178 O << "{" << getRegisterName(MI->getOperand(OpNum).getReg()) << "[], "
1179 << getRegisterName(MI->getOperand(OpNum).getReg() + 2) << "[], "
1180 << getRegisterName(MI->getOperand(OpNum).getReg() + 4) << "[]}";
1183 void ARMInstPrinter::printVectorListFourSpacedAllLanes(const MCInst *MI,
1186 // Normally, it's not safe to use register enum values directly with
1187 // addition to get the next register, but for VFP registers, the
1188 // sort order is guaranteed because they're all of the form D<n>.
1189 O << "{" << getRegisterName(MI->getOperand(OpNum).getReg()) << "[], "
1190 << getRegisterName(MI->getOperand(OpNum).getReg() + 2) << "[], "
1191 << getRegisterName(MI->getOperand(OpNum).getReg() + 4) << "[], "
1192 << getRegisterName(MI->getOperand(OpNum).getReg() + 6) << "[]}";
1195 void ARMInstPrinter::printVectorListThreeSpaced(const MCInst *MI,
1198 // Normally, it's not safe to use register enum values directly with
1199 // addition to get the next register, but for VFP registers, the
1200 // sort order is guaranteed because they're all of the form D<n>.
1201 O << "{" << getRegisterName(MI->getOperand(OpNum).getReg()) << ", "
1202 << getRegisterName(MI->getOperand(OpNum).getReg() + 2) << ", "
1203 << getRegisterName(MI->getOperand(OpNum).getReg() + 4) << "}";
1206 void ARMInstPrinter::printVectorListFourSpaced(const MCInst *MI,
1209 // Normally, it's not safe to use register enum values directly with
1210 // addition to get the next register, but for VFP registers, the
1211 // sort order is guaranteed because they're all of the form D<n>.
1212 O << "{" << getRegisterName(MI->getOperand(OpNum).getReg()) << ", "
1213 << getRegisterName(MI->getOperand(OpNum).getReg() + 2) << ", "
1214 << getRegisterName(MI->getOperand(OpNum).getReg() + 4) << ", "
1215 << getRegisterName(MI->getOperand(OpNum).getReg() + 6) << "}";