ARMInstPrinter.cpp revision 8cb415e4c0032300a1b728c942f8b31acec0a9f5 
1//===-- ARMInstPrinter.cpp - Convert ARM MCInst to assembly syntax --------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This class prints an ARM MCInst to a .s file.
11//
12//===----------------------------------------------------------------------===//
13
14#define DEBUG_TYPE "asm-printer"
15#include "ARMBaseInfo.h"
16#include "ARMInstPrinter.h"
17#include "ARMAddressingModes.h"
18#include "llvm/MC/MCInst.h"
19#include "llvm/MC/MCAsmInfo.h"
20#include "llvm/MC/MCExpr.h"
21#include "llvm/ADT/StringExtras.h"
22#include "llvm/Support/raw_ostream.h"
23using namespace llvm;
24
25#define GET_INSTRUCTION_NAME
26#include "ARMGenAsmWriter.inc"
27
28StringRef ARMInstPrinter::getOpcodeName(unsigned Opcode) const {
29  return getInstructionName(Opcode);
30}
31
32
33void ARMInstPrinter::printInst(const MCInst *MI, raw_ostream &O) {
34  unsigned Opcode = MI->getOpcode();
35
36  // Check for MOVs and print canonical forms, instead.
37  if (Opcode == ARM::MOVs) {
38    // FIXME: Thumb variants?
39    const MCOperand &Dst = MI->getOperand(0);
40    const MCOperand &MO1 = MI->getOperand(1);
41    const MCOperand &MO2 = MI->getOperand(2);
42    const MCOperand &MO3 = MI->getOperand(3);
43
44    O << '\t' << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(MO3.getImm()));
45    printSBitModifierOperand(MI, 6, O);
46    printPredicateOperand(MI, 4, O);
47
48    O << '\t' << getRegisterName(Dst.getReg())
49      << ", " << getRegisterName(MO1.getReg());
50
51    if (ARM_AM::getSORegShOp(MO3.getImm()) == ARM_AM::rrx)
52      return;
53
54    O << ", ";
55
56    if (MO2.getReg()) {
57      O << getRegisterName(MO2.getReg());
58      assert(ARM_AM::getSORegOffset(MO3.getImm()) == 0);
59    } else {
60      O << "#" << ARM_AM::getSORegOffset(MO3.getImm());
61    }
62    return;
63  }
64
65  // A8.6.123 PUSH
66  if ((Opcode == ARM::STMDB_UPD || Opcode == ARM::t2STMDB_UPD) &&
67      MI->getOperand(0).getReg() == ARM::SP) {
68    O << '\t' << "push";
69    printPredicateOperand(MI, 2, O);
70    if (Opcode == ARM::t2STMDB_UPD)
71      O << ".w";
72    O << '\t';
73    printRegisterList(MI, 4, O);
74    return;
75  }
76
77  // A8.6.122 POP
78  if ((Opcode == ARM::LDMIA_UPD || Opcode == ARM::t2LDMIA_UPD) &&
79      MI->getOperand(0).getReg() == ARM::SP) {
80    O << '\t' << "pop";
81    printPredicateOperand(MI, 2, O);
82    if (Opcode == ARM::t2LDMIA_UPD)
83      O << ".w";
84    O << '\t';
85    printRegisterList(MI, 4, O);
86    return;
87  }
88
89  // A8.6.355 VPUSH
90  if ((Opcode == ARM::VSTMSDB_UPD || Opcode == ARM::VSTMDDB_UPD) &&
91      MI->getOperand(0).getReg() == ARM::SP) {
92    O << '\t' << "vpush";
93    printPredicateOperand(MI, 2, O);
94    O << '\t';
95    printRegisterList(MI, 4, O);
96    return;
97  }
98
99  // A8.6.354 VPOP
100  if ((Opcode == ARM::VLDMSIA_UPD || Opcode == ARM::VLDMDIA_UPD) &&
101      MI->getOperand(0).getReg() == ARM::SP) {
102    O << '\t' << "vpop";
103    printPredicateOperand(MI, 2, O);
104    O << '\t';
105    printRegisterList(MI, 4, O);
106    return;
107  }
108
109  printInstruction(MI, O);
110}
111
112void ARMInstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
113                                  raw_ostream &O) {
114  const MCOperand &Op = MI->getOperand(OpNo);
115  if (Op.isReg()) {
116    unsigned Reg = Op.getReg();
117    O << getRegisterName(Reg);
118  } else if (Op.isImm()) {
119    O << '#' << Op.getImm();
120  } else {
121    assert(Op.isExpr() && "unknown operand kind in printOperand");
122    O << *Op.getExpr();
123  }
124}
125
126static void printSOImm(raw_ostream &O, int64_t V, raw_ostream *CommentStream,
127                       const MCAsmInfo *MAI) {
128  // Break it up into two parts that make up a shifter immediate.
129  V = ARM_AM::getSOImmVal(V);
130  assert(V != -1 && "Not a valid so_imm value!");
131
132  unsigned Imm = ARM_AM::getSOImmValImm(V);
133  unsigned Rot = ARM_AM::getSOImmValRot(V);
134
135  // Print low-level immediate formation info, per
136  // A5.1.3: "Data-processing operands - Immediate".
137  if (Rot) {
138    O << "#" << Imm << ", " << Rot;
139    // Pretty printed version.
140    if (CommentStream)
141      *CommentStream << (int)ARM_AM::rotr32(Imm, Rot) << "\n";
142  } else {
143    O << "#" << Imm;
144  }
145}
146
147
148/// printSOImmOperand - SOImm is 4-bit rotate amount in bits 8-11 with 8-bit
149/// immediate in bits 0-7.
150void ARMInstPrinter::printSOImmOperand(const MCInst *MI, unsigned OpNum,
151                                       raw_ostream &O) {
152  const MCOperand &MO = MI->getOperand(OpNum);
153  assert(MO.isImm() && "Not a valid so_imm value!");
154  printSOImm(O, MO.getImm(), CommentStream, &MAI);
155}
156
157// so_reg is a 4-operand unit corresponding to register forms of the A5.1
158// "Addressing Mode 1 - Data-processing operands" forms.  This includes:
159//    REG 0   0           - e.g. R5
160//    REG REG 0,SH_OPC    - e.g. R5, ROR R3
161//    REG 0   IMM,SH_OPC  - e.g. R5, LSL #3
162void ARMInstPrinter::printSORegOperand(const MCInst *MI, unsigned OpNum,
163                                       raw_ostream &O) {
164  const MCOperand &MO1 = MI->getOperand(OpNum);
165  const MCOperand &MO2 = MI->getOperand(OpNum+1);
166  const MCOperand &MO3 = MI->getOperand(OpNum+2);
167
168  O << getRegisterName(MO1.getReg());
169
170  // Print the shift opc.
171  ARM_AM::ShiftOpc ShOpc = ARM_AM::getSORegShOp(MO3.getImm());
172  O << ", " << ARM_AM::getShiftOpcStr(ShOpc);
173  if (MO2.getReg()) {
174    O << ' ' << getRegisterName(MO2.getReg());
175    assert(ARM_AM::getSORegOffset(MO3.getImm()) == 0);
176  } else if (ShOpc != ARM_AM::rrx) {
177    O << " #" << ARM_AM::getSORegOffset(MO3.getImm());
178  }
179}
180
181
182void ARMInstPrinter::printAddrMode2Operand(const MCInst *MI, unsigned Op,
183                                           raw_ostream &O) {
184  const MCOperand &MO1 = MI->getOperand(Op);
185  const MCOperand &MO2 = MI->getOperand(Op+1);
186  const MCOperand &MO3 = MI->getOperand(Op+2);
187
188  if (!MO1.isReg()) {   // FIXME: This is for CP entries, but isn't right.
189    printOperand(MI, Op, O);
190    return;
191  }
192
193  O << "[" << getRegisterName(MO1.getReg());
194
195  if (!MO2.getReg()) {
196    if (ARM_AM::getAM2Offset(MO3.getImm())) // Don't print +0.
197      O << ", #"
198        << ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO3.getImm()))
199        << ARM_AM::getAM2Offset(MO3.getImm());
200    O << "]";
201    return;
202  }
203
204  O << ", "
205    << ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO3.getImm()))
206    << getRegisterName(MO2.getReg());
207
208  if (unsigned ShImm = ARM_AM::getAM2Offset(MO3.getImm()))
209    O << ", "
210    << ARM_AM::getShiftOpcStr(ARM_AM::getAM2ShiftOpc(MO3.getImm()))
211    << " #" << ShImm;
212  O << "]";
213}
214
215void ARMInstPrinter::printAddrMode2OffsetOperand(const MCInst *MI,
216                                                 unsigned OpNum,
217                                                 raw_ostream &O) {
218  const MCOperand &MO1 = MI->getOperand(OpNum);
219  const MCOperand &MO2 = MI->getOperand(OpNum+1);
220
221  if (!MO1.getReg()) {
222    unsigned ImmOffs = ARM_AM::getAM2Offset(MO2.getImm());
223    O << '#'
224      << ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO2.getImm()))
225      << ImmOffs;
226    return;
227  }
228
229  O << ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO2.getImm()))
230    << getRegisterName(MO1.getReg());
231
232  if (unsigned ShImm = ARM_AM::getAM2Offset(MO2.getImm()))
233    O << ", "
234    << ARM_AM::getShiftOpcStr(ARM_AM::getAM2ShiftOpc(MO2.getImm()))
235    << " #" << ShImm;
236}
237
238void ARMInstPrinter::printAddrMode3Operand(const MCInst *MI, unsigned OpNum,
239                                           raw_ostream &O) {
240  const MCOperand &MO1 = MI->getOperand(OpNum);
241  const MCOperand &MO2 = MI->getOperand(OpNum+1);
242  const MCOperand &MO3 = MI->getOperand(OpNum+2);
243
244  O << '[' << getRegisterName(MO1.getReg());
245
246  if (MO2.getReg()) {
247    O << ", " << (char)ARM_AM::getAM3Op(MO3.getImm())
248      << getRegisterName(MO2.getReg()) << ']';
249    return;
250  }
251
252  if (unsigned ImmOffs = ARM_AM::getAM3Offset(MO3.getImm()))
253    O << ", #"
254      << ARM_AM::getAddrOpcStr(ARM_AM::getAM3Op(MO3.getImm()))
255      << ImmOffs;
256  O << ']';
257}
258
259void ARMInstPrinter::printAddrMode3OffsetOperand(const MCInst *MI,
260                                                 unsigned OpNum,
261                                                 raw_ostream &O) {
262  const MCOperand &MO1 = MI->getOperand(OpNum);
263  const MCOperand &MO2 = MI->getOperand(OpNum+1);
264
265  if (MO1.getReg()) {
266    O << (char)ARM_AM::getAM3Op(MO2.getImm())
267    << getRegisterName(MO1.getReg());
268    return;
269  }
270
271  unsigned ImmOffs = ARM_AM::getAM3Offset(MO2.getImm());
272  O << '#'
273    << ARM_AM::getAddrOpcStr(ARM_AM::getAM3Op(MO2.getImm()))
274    << ImmOffs;
275}
276
277void ARMInstPrinter::printLdStmModeOperand(const MCInst *MI, unsigned OpNum,
278                                           raw_ostream &O) {
279  ARM_AM::AMSubMode Mode = ARM_AM::getAM4SubMode(MI->getOperand(OpNum)
280                                                 .getImm());
281  O << ARM_AM::getAMSubModeStr(Mode);
282}
283
284void ARMInstPrinter::printAddrMode5Operand(const MCInst *MI, unsigned OpNum,
285                                           raw_ostream &O) {
286  const MCOperand &MO1 = MI->getOperand(OpNum);
287  const MCOperand &MO2 = MI->getOperand(OpNum+1);
288
289  if (!MO1.isReg()) {   // FIXME: This is for CP entries, but isn't right.
290    printOperand(MI, OpNum, O);
291    return;
292  }
293
294  O << "[" << getRegisterName(MO1.getReg());
295
296  if (unsigned ImmOffs = ARM_AM::getAM5Offset(MO2.getImm())) {
297    O << ", #"
298      << ARM_AM::getAddrOpcStr(ARM_AM::getAM5Op(MO2.getImm()))
299      << ImmOffs * 4;
300  }
301  O << "]";
302}
303
304void ARMInstPrinter::printAddrMode6Operand(const MCInst *MI, unsigned OpNum,
305                                           raw_ostream &O) {
306  const MCOperand &MO1 = MI->getOperand(OpNum);
307  const MCOperand &MO2 = MI->getOperand(OpNum+1);
308
309  O << "[" << getRegisterName(MO1.getReg());
310  if (MO2.getImm()) {
311    // FIXME: Both darwin as and GNU as violate ARM docs here.
312    O << ", :" << (MO2.getImm() << 3);
313  }
314  O << "]";
315}
316
317void ARMInstPrinter::printAddrMode6OffsetOperand(const MCInst *MI,
318                                                 unsigned OpNum,
319                                                 raw_ostream &O) {
320  const MCOperand &MO = MI->getOperand(OpNum);
321  if (MO.getReg() == 0)
322    O << "!";
323  else
324    O << ", " << getRegisterName(MO.getReg());
325}
326
327void ARMInstPrinter::printBitfieldInvMaskImmOperand(const MCInst *MI,
328                                                    unsigned OpNum,
329                                                    raw_ostream &O) {
330  const MCOperand &MO = MI->getOperand(OpNum);
331  uint32_t v = ~MO.getImm();
332  int32_t lsb = CountTrailingZeros_32(v);
333  int32_t width = (32 - CountLeadingZeros_32 (v)) - lsb;
334  assert(MO.isImm() && "Not a valid bf_inv_mask_imm value!");
335  O << '#' << lsb << ", #" << width;
336}
337
338void ARMInstPrinter::printMemBOption(const MCInst *MI, unsigned OpNum,
339                                     raw_ostream &O) {
340  unsigned val = MI->getOperand(OpNum).getImm();
341  O << ARM_MB::MemBOptToString(val);
342}
343
344void ARMInstPrinter::printShiftImmOperand(const MCInst *MI, unsigned OpNum,
345                                          raw_ostream &O) {
346  unsigned ShiftOp = MI->getOperand(OpNum).getImm();
347  ARM_AM::ShiftOpc Opc = ARM_AM::getSORegShOp(ShiftOp);
348  switch (Opc) {
349  case ARM_AM::no_shift:
350    return;
351  case ARM_AM::lsl:
352    O << ", lsl #";
353    break;
354  case ARM_AM::asr:
355    O << ", asr #";
356    break;
357  default:
358    assert(0 && "unexpected shift opcode for shift immediate operand");
359  }
360  O << ARM_AM::getSORegOffset(ShiftOp);
361}
362
363void ARMInstPrinter::printRegisterList(const MCInst *MI, unsigned OpNum,
364                                       raw_ostream &O) {
365  O << "{";
366  for (unsigned i = OpNum, e = MI->getNumOperands(); i != e; ++i) {
367    if (i != OpNum) O << ", ";
368    O << getRegisterName(MI->getOperand(i).getReg());
369  }
370  O << "}";
371}
372
373void ARMInstPrinter::printSetendOperand(const MCInst *MI, unsigned OpNum,
374                                        raw_ostream &O) {
375  const MCOperand &Op = MI->getOperand(OpNum);
376  if (Op.getImm())
377    O << "be";
378  else
379    O << "le";
380}
381
382void ARMInstPrinter::printCPSOptionOperand(const MCInst *MI, unsigned OpNum,
383                                           raw_ostream &O) {
384  const MCOperand &Op = MI->getOperand(OpNum);
385  unsigned option = Op.getImm();
386  unsigned mode = option & 31;
387  bool changemode = option >> 5 & 1;
388  unsigned AIF = option >> 6 & 7;
389  unsigned imod = option >> 9 & 3;
390  if (imod == 2)
391    O << "ie";
392  else if (imod == 3)
393    O << "id";
394  O << '\t';
395  if (imod > 1) {
396    if (AIF & 4) O << 'a';
397    if (AIF & 2) O << 'i';
398    if (AIF & 1) O << 'f';
399    if (AIF > 0 && changemode) O << ", ";
400  }
401  if (changemode)
402    O << '#' << mode;
403}
404
405void ARMInstPrinter::printMSRMaskOperand(const MCInst *MI, unsigned OpNum,
406                                         raw_ostream &O) {
407  const MCOperand &Op = MI->getOperand(OpNum);
408  unsigned Mask = Op.getImm();
409  if (Mask) {
410    O << '_';
411    if (Mask & 8) O << 'f';
412    if (Mask & 4) O << 's';
413    if (Mask & 2) O << 'x';
414    if (Mask & 1) O << 'c';
415  }
416}
417
418void ARMInstPrinter::printNegZeroOperand(const MCInst *MI, unsigned OpNum,
419                                         raw_ostream &O) {
420  const MCOperand &Op = MI->getOperand(OpNum);
421  O << '#';
422  if (Op.getImm() < 0)
423    O << '-' << (-Op.getImm() - 1);
424  else
425    O << Op.getImm();
426}
427
428void ARMInstPrinter::printPredicateOperand(const MCInst *MI, unsigned OpNum,
429                                           raw_ostream &O) {
430  ARMCC::CondCodes CC = (ARMCC::CondCodes)MI->getOperand(OpNum).getImm();
431  if (CC != ARMCC::AL)
432    O << ARMCondCodeToString(CC);
433}
434
435void ARMInstPrinter::printMandatoryPredicateOperand(const MCInst *MI,
436                                                    unsigned OpNum,
437                                                    raw_ostream &O) {
438  ARMCC::CondCodes CC = (ARMCC::CondCodes)MI->getOperand(OpNum).getImm();
439  O << ARMCondCodeToString(CC);
440}
441
442void ARMInstPrinter::printSBitModifierOperand(const MCInst *MI, unsigned OpNum,
443                                              raw_ostream &O) {
444  if (MI->getOperand(OpNum).getReg()) {
445    assert(MI->getOperand(OpNum).getReg() == ARM::CPSR &&
446           "Expect ARM CPSR register!");
447    O << 's';
448  }
449}
450
451void ARMInstPrinter::printNoHashImmediate(const MCInst *MI, unsigned OpNum,
452                                          raw_ostream &O) {
453  O << MI->getOperand(OpNum).getImm();
454}
455
456void ARMInstPrinter::printPImmediate(const MCInst *MI, unsigned OpNum,
457                                          raw_ostream &O) {
458  O << "p" << MI->getOperand(OpNum).getImm();
459}
460
461void ARMInstPrinter::printCImmediate(const MCInst *MI, unsigned OpNum,
462                                          raw_ostream &O) {
463  O << "c" << MI->getOperand(OpNum).getImm();
464}
465
466void ARMInstPrinter::printPCLabel(const MCInst *MI, unsigned OpNum,
467                                  raw_ostream &O) {
468  llvm_unreachable("Unhandled PC-relative pseudo-instruction!");
469}
470
471void ARMInstPrinter::printThumbS4ImmOperand(const MCInst *MI, unsigned OpNum,
472                                            raw_ostream &O) {
473  O << "#" <<  MI->getOperand(OpNum).getImm() * 4;
474}
475
476void ARMInstPrinter::printThumbITMask(const MCInst *MI, unsigned OpNum,
477                                      raw_ostream &O) {
478  // (3 - the number of trailing zeros) is the number of then / else.
479  unsigned Mask = MI->getOperand(OpNum).getImm();
480  unsigned CondBit0 = Mask >> 4 & 1;
481  unsigned NumTZ = CountTrailingZeros_32(Mask);
482  assert(NumTZ <= 3 && "Invalid IT mask!");
483  for (unsigned Pos = 3, e = NumTZ; Pos > e; --Pos) {
484    bool T = ((Mask >> Pos) & 1) == CondBit0;
485    if (T)
486      O << 't';
487    else
488      O << 'e';
489  }
490}
491
492void ARMInstPrinter::printThumbAddrModeRROperand(const MCInst *MI, unsigned Op,
493                                                 raw_ostream &O) {
494  const MCOperand &MO1 = MI->getOperand(Op);
495  const MCOperand &MO2 = MI->getOperand(Op + 1);
496
497  if (!MO1.isReg()) {   // FIXME: This is for CP entries, but isn't right.
498    printOperand(MI, Op, O);
499    return;
500  }
501
502  O << "[" << getRegisterName(MO1.getReg());
503  if (unsigned RegNum = MO2.getReg())
504    O << ", " << getRegisterName(RegNum);
505  O << "]";
506}
507
508void ARMInstPrinter::printThumbAddrModeImm5SOperand(const MCInst *MI,
509                                                    unsigned Op,
510                                                    raw_ostream &O,
511                                                    unsigned Scale) {
512  const MCOperand &MO1 = MI->getOperand(Op);
513  const MCOperand &MO2 = MI->getOperand(Op + 1);
514
515  if (!MO1.isReg()) {   // FIXME: This is for CP entries, but isn't right.
516    printOperand(MI, Op, O);
517    return;
518  }
519
520  O << "[" << getRegisterName(MO1.getReg());
521  if (unsigned ImmOffs = MO2.getImm())
522    O << ", #" << ImmOffs * Scale;
523  O << "]";
524}
525
526void ARMInstPrinter::printThumbAddrModeImm5S1Operand(const MCInst *MI,
527                                                     unsigned Op,
528                                                     raw_ostream &O) {
529  printThumbAddrModeImm5SOperand(MI, Op, O, 1);
530}
531
532void ARMInstPrinter::printThumbAddrModeImm5S2Operand(const MCInst *MI,
533                                                     unsigned Op,
534                                                     raw_ostream &O) {
535  printThumbAddrModeImm5SOperand(MI, Op, O, 2);
536}
537
538void ARMInstPrinter::printThumbAddrModeImm5S4Operand(const MCInst *MI,
539                                                     unsigned Op,
540                                                     raw_ostream &O) {
541  printThumbAddrModeImm5SOperand(MI, Op, O, 4);
542}
543
544void ARMInstPrinter::printThumbAddrModeSPOperand(const MCInst *MI, unsigned Op,
545                                                 raw_ostream &O) {
546  printThumbAddrModeImm5SOperand(MI, Op, O, 4);
547}
548
549// Constant shifts t2_so_reg is a 2-operand unit corresponding to the Thumb2
550// register with shift forms.
551// REG 0   0           - e.g. R5
552// REG IMM, SH_OPC     - e.g. R5, LSL #3
553void ARMInstPrinter::printT2SOOperand(const MCInst *MI, unsigned OpNum,
554                                      raw_ostream &O) {
555  const MCOperand &MO1 = MI->getOperand(OpNum);
556  const MCOperand &MO2 = MI->getOperand(OpNum+1);
557
558  unsigned Reg = MO1.getReg();
559  O << getRegisterName(Reg);
560
561  // Print the shift opc.
562  assert(MO2.isImm() && "Not a valid t2_so_reg value!");
563  ARM_AM::ShiftOpc ShOpc = ARM_AM::getSORegShOp(MO2.getImm());
564  O << ", " << ARM_AM::getShiftOpcStr(ShOpc);
565  if (ShOpc != ARM_AM::rrx)
566    O << " #" << ARM_AM::getSORegOffset(MO2.getImm());
567}
568
569void ARMInstPrinter::printAddrModeImm12Operand(const MCInst *MI, unsigned OpNum,
570                                               raw_ostream &O) {
571  const MCOperand &MO1 = MI->getOperand(OpNum);
572  const MCOperand &MO2 = MI->getOperand(OpNum+1);
573
574  if (!MO1.isReg()) {   // FIXME: This is for CP entries, but isn't right.
575    printOperand(MI, OpNum, O);
576    return;
577  } else if (MO1.getReg() == ARM::PC && MO2.isExpr()) {
578    printOperand(MI, OpNum+1, O);
579    return;
580  }
581
582  O << "[" << getRegisterName(MO1.getReg());
583
584  int32_t OffImm = (int32_t)MO2.getImm();
585  bool isSub = OffImm < 0;
586  // Special value for #-0. All others are normal.
587  if (OffImm == INT32_MIN)
588    OffImm = 0;
589  if (isSub)
590    O << ", #-" << -OffImm;
591  else if (OffImm > 0)
592    O << ", #" << OffImm;
593  O << "]";
594}
595
596void ARMInstPrinter::printT2AddrModeImm8Operand(const MCInst *MI,
597                                                unsigned OpNum,
598                                                raw_ostream &O) {
599  const MCOperand &MO1 = MI->getOperand(OpNum);
600  const MCOperand &MO2 = MI->getOperand(OpNum+1);
601
602  O << "[" << getRegisterName(MO1.getReg());
603
604  int32_t OffImm = (int32_t)MO2.getImm();
605  // Don't print +0.
606  if (OffImm < 0)
607    O << ", #-" << -OffImm;
608  else if (OffImm > 0)
609    O << ", #" << OffImm;
610  O << "]";
611}
612
613void ARMInstPrinter::printT2AddrModeImm8s4Operand(const MCInst *MI,
614                                                  unsigned OpNum,
615                                                  raw_ostream &O) {
616  const MCOperand &MO1 = MI->getOperand(OpNum);
617  const MCOperand &MO2 = MI->getOperand(OpNum+1);
618
619  O << "[" << getRegisterName(MO1.getReg());
620
621  int32_t OffImm = (int32_t)MO2.getImm() / 4;
622  // Don't print +0.
623  if (OffImm < 0)
624    O << ", #-" << -OffImm * 4;
625  else if (OffImm > 0)
626    O << ", #" << OffImm * 4;
627  O << "]";
628}
629
630void ARMInstPrinter::printT2AddrModeImm8OffsetOperand(const MCInst *MI,
631                                                      unsigned OpNum,
632                                                      raw_ostream &O) {
633  const MCOperand &MO1 = MI->getOperand(OpNum);
634  int32_t OffImm = (int32_t)MO1.getImm();
635  // Don't print +0.
636  if (OffImm < 0)
637    O << "#-" << -OffImm;
638  else if (OffImm > 0)
639    O << "#" << OffImm;
640}
641
642void ARMInstPrinter::printT2AddrModeImm8s4OffsetOperand(const MCInst *MI,
643                                                        unsigned OpNum,
644                                                        raw_ostream &O) {
645  const MCOperand &MO1 = MI->getOperand(OpNum);
646  int32_t OffImm = (int32_t)MO1.getImm() / 4;
647  // Don't print +0.
648  if (OffImm < 0)
649    O << "#-" << -OffImm * 4;
650  else if (OffImm > 0)
651    O << "#" << OffImm * 4;
652}
653
654void ARMInstPrinter::printT2AddrModeSoRegOperand(const MCInst *MI,
655                                                 unsigned OpNum,
656                                                 raw_ostream &O) {
657  const MCOperand &MO1 = MI->getOperand(OpNum);
658  const MCOperand &MO2 = MI->getOperand(OpNum+1);
659  const MCOperand &MO3 = MI->getOperand(OpNum+2);
660
661  O << "[" << getRegisterName(MO1.getReg());
662
663  assert(MO2.getReg() && "Invalid so_reg load / store address!");
664  O << ", " << getRegisterName(MO2.getReg());
665
666  unsigned ShAmt = MO3.getImm();
667  if (ShAmt) {
668    assert(ShAmt <= 3 && "Not a valid Thumb2 addressing mode!");
669    O << ", lsl #" << ShAmt;
670  }
671  O << "]";
672}
673
674void ARMInstPrinter::printVFPf32ImmOperand(const MCInst *MI, unsigned OpNum,
675                                           raw_ostream &O) {
676  const MCOperand &MO = MI->getOperand(OpNum);
677  O << '#';
678  if (MO.isFPImm()) {
679    O << (float)MO.getFPImm();
680  } else {
681    union {
682      uint32_t I;
683      float F;
684    } FPUnion;
685
686    FPUnion.I = MO.getImm();
687    O << FPUnion.F;
688  }
689}
690
691void ARMInstPrinter::printVFPf64ImmOperand(const MCInst *MI, unsigned OpNum,
692                                           raw_ostream &O) {
693  const MCOperand &MO = MI->getOperand(OpNum);
694  O << '#';
695  if (MO.isFPImm()) {
696    O << MO.getFPImm();
697  } else {
698    // We expect the binary encoding of a floating point number here.
699    union {
700      uint64_t I;
701      double D;
702    } FPUnion;
703
704    FPUnion.I = MO.getImm();
705    O << FPUnion.D;
706  }
707}
708
709void ARMInstPrinter::printNEONModImmOperand(const MCInst *MI, unsigned OpNum,
710                                            raw_ostream &O) {
711  unsigned EncodedImm = MI->getOperand(OpNum).getImm();
712  unsigned EltBits;
713  uint64_t Val = ARM_AM::decodeNEONModImm(EncodedImm, EltBits);
714  O << "#0x" << utohexstr(Val);
715}
716