ARMInstPrinter.cpp revision b41aaab5a1769f4df04d566da37866ac91b6ee9e 
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
32StringRef ARMInstPrinter::getRegName(unsigned RegNo) const {
33  return getRegisterName(RegNo);
34}
35
36void ARMInstPrinter::printInst(const MCInst *MI, raw_ostream &O) {
37  unsigned Opcode = MI->getOpcode();
38
39  // Check for MOVs and print canonical forms, instead.
40  if (Opcode == ARM::MOVs) {
41    // FIXME: Thumb variants?
42    const MCOperand &Dst = MI->getOperand(0);
43    const MCOperand &MO1 = MI->getOperand(1);
44    const MCOperand &MO2 = MI->getOperand(2);
45    const MCOperand &MO3 = MI->getOperand(3);
46
47    O << '\t' << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(MO3.getImm()));
48    printSBitModifierOperand(MI, 6, O);
49    printPredicateOperand(MI, 4, O);
50
51    O << '\t' << getRegisterName(Dst.getReg())
52      << ", " << getRegisterName(MO1.getReg());
53
54    if (ARM_AM::getSORegShOp(MO3.getImm()) == ARM_AM::rrx)
55      return;
56
57    O << ", ";
58
59    if (MO2.getReg()) {
60      O << getRegisterName(MO2.getReg());
61      assert(ARM_AM::getSORegOffset(MO3.getImm()) == 0);
62    } else {
63      O << "#" << ARM_AM::getSORegOffset(MO3.getImm());
64    }
65    return;
66  }
67
68  // A8.6.123 PUSH
69  if ((Opcode == ARM::STMDB_UPD || Opcode == ARM::t2STMDB_UPD) &&
70      MI->getOperand(0).getReg() == ARM::SP) {
71    O << '\t' << "push";
72    printPredicateOperand(MI, 2, O);
73    if (Opcode == ARM::t2STMDB_UPD)
74      O << ".w";
75    O << '\t';
76    printRegisterList(MI, 4, O);
77    return;
78  }
79
80  // A8.6.122 POP
81  if ((Opcode == ARM::LDMIA_UPD || Opcode == ARM::t2LDMIA_UPD) &&
82      MI->getOperand(0).getReg() == ARM::SP) {
83    O << '\t' << "pop";
84    printPredicateOperand(MI, 2, O);
85    if (Opcode == ARM::t2LDMIA_UPD)
86      O << ".w";
87    O << '\t';
88    printRegisterList(MI, 4, O);
89    return;
90  }
91
92  // A8.6.355 VPUSH
93  if ((Opcode == ARM::VSTMSDB_UPD || Opcode == ARM::VSTMDDB_UPD) &&
94      MI->getOperand(0).getReg() == ARM::SP) {
95    O << '\t' << "vpush";
96    printPredicateOperand(MI, 2, O);
97    O << '\t';
98    printRegisterList(MI, 4, O);
99    return;
100  }
101
102  // A8.6.354 VPOP
103  if ((Opcode == ARM::VLDMSIA_UPD || Opcode == ARM::VLDMDIA_UPD) &&
104      MI->getOperand(0).getReg() == ARM::SP) {
105    O << '\t' << "vpop";
106    printPredicateOperand(MI, 2, O);
107    O << '\t';
108    printRegisterList(MI, 4, O);
109    return;
110  }
111
112  printInstruction(MI, O);
113}
114
115void ARMInstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
116                                  raw_ostream &O) {
117  const MCOperand &Op = MI->getOperand(OpNo);
118  if (Op.isReg()) {
119    unsigned Reg = Op.getReg();
120    O << getRegisterName(Reg);
121  } else if (Op.isImm()) {
122    O << '#' << Op.getImm();
123  } else {
124    assert(Op.isExpr() && "unknown operand kind in printOperand");
125    O << *Op.getExpr();
126  }
127}
128
129static void printSOImm(raw_ostream &O, int64_t V, raw_ostream *CommentStream,
130                       const MCAsmInfo *MAI) {
131  // Break it up into two parts that make up a shifter immediate.
132  V = ARM_AM::getSOImmVal(V);
133  assert(V != -1 && "Not a valid so_imm value!");
134
135  unsigned Imm = ARM_AM::getSOImmValImm(V);
136  unsigned Rot = ARM_AM::getSOImmValRot(V);
137
138  // Print low-level immediate formation info, per
139  // A5.1.3: "Data-processing operands - Immediate".
140  if (Rot) {
141    O << "#" << Imm << ", " << Rot;
142    // Pretty printed version.
143    if (CommentStream)
144      *CommentStream << (int)ARM_AM::rotr32(Imm, Rot) << "\n";
145  } else {
146    O << "#" << Imm;
147  }
148}
149
150
151/// printSOImmOperand - SOImm is 4-bit rotate amount in bits 8-11 with 8-bit
152/// immediate in bits 0-7.
153void ARMInstPrinter::printSOImmOperand(const MCInst *MI, unsigned OpNum,
154                                       raw_ostream &O) {
155  const MCOperand &MO = MI->getOperand(OpNum);
156  assert(MO.isImm() && "Not a valid so_imm value!");
157  printSOImm(O, MO.getImm(), CommentStream, &MAI);
158}
159
160// so_reg is a 4-operand unit corresponding to register forms of the A5.1
161// "Addressing Mode 1 - Data-processing operands" forms.  This includes:
162//    REG 0   0           - e.g. R5
163//    REG REG 0,SH_OPC    - e.g. R5, ROR R3
164//    REG 0   IMM,SH_OPC  - e.g. R5, LSL #3
165void ARMInstPrinter::printSORegOperand(const MCInst *MI, unsigned OpNum,
166                                       raw_ostream &O) {
167  const MCOperand &MO1 = MI->getOperand(OpNum);
168  const MCOperand &MO2 = MI->getOperand(OpNum+1);
169  const MCOperand &MO3 = MI->getOperand(OpNum+2);
170
171  O << getRegisterName(MO1.getReg());
172
173  // Print the shift opc.
174  ARM_AM::ShiftOpc ShOpc = ARM_AM::getSORegShOp(MO3.getImm());
175  O << ", " << ARM_AM::getShiftOpcStr(ShOpc);
176  if (MO2.getReg()) {
177    O << ' ' << getRegisterName(MO2.getReg());
178    assert(ARM_AM::getSORegOffset(MO3.getImm()) == 0);
179  } else if (ShOpc != ARM_AM::rrx) {
180    O << " #" << ARM_AM::getSORegOffset(MO3.getImm());
181  }
182}
183
184
185void ARMInstPrinter::printAddrMode2Operand(const MCInst *MI, unsigned Op,
186                                           raw_ostream &O) {
187  const MCOperand &MO1 = MI->getOperand(Op);
188  const MCOperand &MO2 = MI->getOperand(Op+1);
189  const MCOperand &MO3 = MI->getOperand(Op+2);
190
191  if (!MO1.isReg()) {   // FIXME: This is for CP entries, but isn't right.
192    printOperand(MI, Op, O);
193    return;
194  }
195
196  O << "[" << getRegisterName(MO1.getReg());
197
198  if (!MO2.getReg()) {
199    if (ARM_AM::getAM2Offset(MO3.getImm())) // Don't print +0.
200      O << ", #"
201        << ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO3.getImm()))
202        << ARM_AM::getAM2Offset(MO3.getImm());
203    O << "]";
204    return;
205  }
206
207  O << ", "
208    << ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO3.getImm()))
209    << getRegisterName(MO2.getReg());
210
211  if (unsigned ShImm = ARM_AM::getAM2Offset(MO3.getImm()))
212    O << ", "
213    << ARM_AM::getShiftOpcStr(ARM_AM::getAM2ShiftOpc(MO3.getImm()))
214    << " #" << ShImm;
215  O << "]";
216}
217
218void ARMInstPrinter::printAddrMode2OffsetOperand(const MCInst *MI,
219                                                 unsigned OpNum,
220                                                 raw_ostream &O) {
221  const MCOperand &MO1 = MI->getOperand(OpNum);
222  const MCOperand &MO2 = MI->getOperand(OpNum+1);
223
224  if (!MO1.getReg()) {
225    unsigned ImmOffs = ARM_AM::getAM2Offset(MO2.getImm());
226    O << '#'
227      << ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO2.getImm()))
228      << ImmOffs;
229    return;
230  }
231
232  O << ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO2.getImm()))
233    << getRegisterName(MO1.getReg());
234
235  if (unsigned ShImm = ARM_AM::getAM2Offset(MO2.getImm()))
236    O << ", "
237    << ARM_AM::getShiftOpcStr(ARM_AM::getAM2ShiftOpc(MO2.getImm()))
238    << " #" << ShImm;
239}
240
241void ARMInstPrinter::printAddrMode3Operand(const MCInst *MI, unsigned OpNum,
242                                           raw_ostream &O) {
243  const MCOperand &MO1 = MI->getOperand(OpNum);
244  const MCOperand &MO2 = MI->getOperand(OpNum+1);
245  const MCOperand &MO3 = MI->getOperand(OpNum+2);
246
247  O << '[' << getRegisterName(MO1.getReg());
248
249  if (MO2.getReg()) {
250    O << ", " << (char)ARM_AM::getAM3Op(MO3.getImm())
251      << getRegisterName(MO2.getReg()) << ']';
252    return;
253  }
254
255  if (unsigned ImmOffs = ARM_AM::getAM3Offset(MO3.getImm()))
256    O << ", #"
257      << ARM_AM::getAddrOpcStr(ARM_AM::getAM3Op(MO3.getImm()))
258      << ImmOffs;
259  O << ']';
260}
261
262void ARMInstPrinter::printAddrMode3OffsetOperand(const MCInst *MI,
263                                                 unsigned OpNum,
264                                                 raw_ostream &O) {
265  const MCOperand &MO1 = MI->getOperand(OpNum);
266  const MCOperand &MO2 = MI->getOperand(OpNum+1);
267
268  if (MO1.getReg()) {
269    O << (char)ARM_AM::getAM3Op(MO2.getImm())
270    << getRegisterName(MO1.getReg());
271    return;
272  }
273
274  unsigned ImmOffs = ARM_AM::getAM3Offset(MO2.getImm());
275  O << '#'
276    << ARM_AM::getAddrOpcStr(ARM_AM::getAM3Op(MO2.getImm()))
277    << ImmOffs;
278}
279
280void ARMInstPrinter::printLdStmModeOperand(const MCInst *MI, unsigned OpNum,
281                                           raw_ostream &O) {
282  ARM_AM::AMSubMode Mode = ARM_AM::getAM4SubMode(MI->getOperand(OpNum)
283                                                 .getImm());
284  O << ARM_AM::getAMSubModeStr(Mode);
285}
286
287void ARMInstPrinter::printAddrMode5Operand(const MCInst *MI, unsigned OpNum,
288                                           raw_ostream &O) {
289  const MCOperand &MO1 = MI->getOperand(OpNum);
290  const MCOperand &MO2 = MI->getOperand(OpNum+1);
291
292  if (!MO1.isReg()) {   // FIXME: This is for CP entries, but isn't right.
293    printOperand(MI, OpNum, O);
294    return;
295  }
296
297  O << "[" << getRegisterName(MO1.getReg());
298
299  if (unsigned ImmOffs = ARM_AM::getAM5Offset(MO2.getImm())) {
300    O << ", #"
301      << ARM_AM::getAddrOpcStr(ARM_AM::getAM5Op(MO2.getImm()))
302      << ImmOffs * 4;
303  }
304  O << "]";
305}
306
307void ARMInstPrinter::printAddrMode6Operand(const MCInst *MI, unsigned OpNum,
308                                           raw_ostream &O) {
309  const MCOperand &MO1 = MI->getOperand(OpNum);
310  const MCOperand &MO2 = MI->getOperand(OpNum+1);
311
312  O << "[" << getRegisterName(MO1.getReg());
313  if (MO2.getImm()) {
314    // FIXME: Both darwin as and GNU as violate ARM docs here.
315    O << ", :" << (MO2.getImm() << 3);
316  }
317  O << "]";
318}
319
320void ARMInstPrinter::printAddrMode7Operand(const MCInst *MI, unsigned OpNum,
321                                           raw_ostream &O) {
322  const MCOperand &MO1 = MI->getOperand(OpNum);
323  O << "[" << getRegisterName(MO1.getReg()) << "]";
324}
325
326void ARMInstPrinter::printAddrMode6OffsetOperand(const MCInst *MI,
327                                                 unsigned OpNum,
328                                                 raw_ostream &O) {
329  const MCOperand &MO = MI->getOperand(OpNum);
330  if (MO.getReg() == 0)
331    O << "!";
332  else
333    O << ", " << getRegisterName(MO.getReg());
334}
335
336void ARMInstPrinter::printBitfieldInvMaskImmOperand(const MCInst *MI,
337                                                    unsigned OpNum,
338                                                    raw_ostream &O) {
339  const MCOperand &MO = MI->getOperand(OpNum);
340  uint32_t v = ~MO.getImm();
341  int32_t lsb = CountTrailingZeros_32(v);
342  int32_t width = (32 - CountLeadingZeros_32 (v)) - lsb;
343  assert(MO.isImm() && "Not a valid bf_inv_mask_imm value!");
344  O << '#' << lsb << ", #" << width;
345}
346
347void ARMInstPrinter::printMemBOption(const MCInst *MI, unsigned OpNum,
348                                     raw_ostream &O) {
349  unsigned val = MI->getOperand(OpNum).getImm();
350  O << ARM_MB::MemBOptToString(val);
351}
352
353void ARMInstPrinter::printShiftImmOperand(const MCInst *MI, unsigned OpNum,
354                                          raw_ostream &O) {
355  unsigned ShiftOp = MI->getOperand(OpNum).getImm();
356  ARM_AM::ShiftOpc Opc = ARM_AM::getSORegShOp(ShiftOp);
357  switch (Opc) {
358  case ARM_AM::no_shift:
359    return;
360  case ARM_AM::lsl:
361    O << ", lsl #";
362    break;
363  case ARM_AM::asr:
364    O << ", asr #";
365    break;
366  default:
367    assert(0 && "unexpected shift opcode for shift immediate operand");
368  }
369  O << ARM_AM::getSORegOffset(ShiftOp);
370}
371
372void ARMInstPrinter::printRegisterList(const MCInst *MI, unsigned OpNum,
373                                       raw_ostream &O) {
374  O << "{";
375  for (unsigned i = OpNum, e = MI->getNumOperands(); i != e; ++i) {
376    if (i != OpNum) O << ", ";
377    O << getRegisterName(MI->getOperand(i).getReg());
378  }
379  O << "}";
380}
381
382void ARMInstPrinter::printSetendOperand(const MCInst *MI, unsigned OpNum,
383                                        raw_ostream &O) {
384  const MCOperand &Op = MI->getOperand(OpNum);
385  if (Op.getImm())
386    O << "be";
387  else
388    O << "le";
389}
390
391void ARMInstPrinter::printCPSIMod(const MCInst *MI, unsigned OpNum,
392                                  raw_ostream &O) {
393  const MCOperand &Op = MI->getOperand(OpNum);
394  O << ARM_PROC::IModToString(Op.getImm());
395}
396
397void ARMInstPrinter::printCPSIFlag(const MCInst *MI, unsigned OpNum,
398                                   raw_ostream &O) {
399  const MCOperand &Op = MI->getOperand(OpNum);
400  unsigned IFlags = Op.getImm();
401  for (int i=2; i >= 0; --i)
402    if (IFlags & (1 << i))
403      O << ARM_PROC::IFlagsToString(1 << i);
404}
405
406void ARMInstPrinter::printMSRMaskOperand(const MCInst *MI, unsigned OpNum,
407                                         raw_ostream &O) {
408  const MCOperand &Op = MI->getOperand(OpNum);
409  unsigned SpecRegRBit = Op.getImm() >> 4;
410  unsigned Mask = Op.getImm() & 0xf;
411
412  if (SpecRegRBit)
413    O << "spsr";
414  else
415    O << "cpsr";
416
417  if (Mask) {
418    O << '_';
419    if (Mask & 8) O << 'f';
420    if (Mask & 4) O << 's';
421    if (Mask & 2) O << 'x';
422    if (Mask & 1) O << 'c';
423  }
424}
425
426void ARMInstPrinter::printPredicateOperand(const MCInst *MI, unsigned OpNum,
427                                           raw_ostream &O) {
428  ARMCC::CondCodes CC = (ARMCC::CondCodes)MI->getOperand(OpNum).getImm();
429  if (CC != ARMCC::AL)
430    O << ARMCondCodeToString(CC);
431}
432
433void ARMInstPrinter::printMandatoryPredicateOperand(const MCInst *MI,
434                                                    unsigned OpNum,
435                                                    raw_ostream &O) {
436  ARMCC::CondCodes CC = (ARMCC::CondCodes)MI->getOperand(OpNum).getImm();
437  O << ARMCondCodeToString(CC);
438}
439
440void ARMInstPrinter::printSBitModifierOperand(const MCInst *MI, unsigned OpNum,
441                                              raw_ostream &O) {
442  if (MI->getOperand(OpNum).getReg()) {
443    assert(MI->getOperand(OpNum).getReg() == ARM::CPSR &&
444           "Expect ARM CPSR register!");
445    O << 's';
446  }
447}
448
449void ARMInstPrinter::printNoHashImmediate(const MCInst *MI, unsigned OpNum,
450                                          raw_ostream &O) {
451  O << MI->getOperand(OpNum).getImm();
452}
453
454void ARMInstPrinter::printPImmediate(const MCInst *MI, unsigned OpNum,
455                                          raw_ostream &O) {
456  O << "p" << MI->getOperand(OpNum).getImm();
457}
458
459void ARMInstPrinter::printCImmediate(const MCInst *MI, unsigned OpNum,
460                                          raw_ostream &O) {
461  O << "c" << MI->getOperand(OpNum).getImm();
462}
463
464void ARMInstPrinter::printPCLabel(const MCInst *MI, unsigned OpNum,
465                                  raw_ostream &O) {
466  llvm_unreachable("Unhandled PC-relative pseudo-instruction!");
467}
468
469void ARMInstPrinter::printThumbS4ImmOperand(const MCInst *MI, unsigned OpNum,
470                                            raw_ostream &O) {
471  O << "#" <<  MI->getOperand(OpNum).getImm() * 4;
472}
473
474void ARMInstPrinter::printThumbITMask(const MCInst *MI, unsigned OpNum,
475                                      raw_ostream &O) {
476  // (3 - the number of trailing zeros) is the number of then / else.
477  unsigned Mask = MI->getOperand(OpNum).getImm();
478  unsigned CondBit0 = Mask >> 4 & 1;
479  unsigned NumTZ = CountTrailingZeros_32(Mask);
480  assert(NumTZ <= 3 && "Invalid IT mask!");
481  for (unsigned Pos = 3, e = NumTZ; Pos > e; --Pos) {
482    bool T = ((Mask >> Pos) & 1) == CondBit0;
483    if (T)
484      O << 't';
485    else
486      O << 'e';
487  }
488}
489
490void ARMInstPrinter::printThumbAddrModeRROperand(const MCInst *MI, unsigned Op,
491                                                 raw_ostream &O) {
492  const MCOperand &MO1 = MI->getOperand(Op);
493  const MCOperand &MO2 = MI->getOperand(Op + 1);
494
495  if (!MO1.isReg()) {   // FIXME: This is for CP entries, but isn't right.
496    printOperand(MI, Op, O);
497    return;
498  }
499
500  O << "[" << getRegisterName(MO1.getReg());
501  if (unsigned RegNum = MO2.getReg())
502    O << ", " << getRegisterName(RegNum);
503  O << "]";
504}
505
506void ARMInstPrinter::printThumbAddrModeImm5SOperand(const MCInst *MI,
507                                                    unsigned Op,
508                                                    raw_ostream &O,
509                                                    unsigned Scale) {
510  const MCOperand &MO1 = MI->getOperand(Op);
511  const MCOperand &MO2 = MI->getOperand(Op + 1);
512
513  if (!MO1.isReg()) {   // FIXME: This is for CP entries, but isn't right.
514    printOperand(MI, Op, O);
515    return;
516  }
517
518  O << "[" << getRegisterName(MO1.getReg());
519  if (unsigned ImmOffs = MO2.getImm())
520    O << ", #" << ImmOffs * Scale;
521  O << "]";
522}
523
524void ARMInstPrinter::printThumbAddrModeImm5S1Operand(const MCInst *MI,
525                                                     unsigned Op,
526                                                     raw_ostream &O) {
527  printThumbAddrModeImm5SOperand(MI, Op, O, 1);
528}
529
530void ARMInstPrinter::printThumbAddrModeImm5S2Operand(const MCInst *MI,
531                                                     unsigned Op,
532                                                     raw_ostream &O) {
533  printThumbAddrModeImm5SOperand(MI, Op, O, 2);
534}
535
536void ARMInstPrinter::printThumbAddrModeImm5S4Operand(const MCInst *MI,
537                                                     unsigned Op,
538                                                     raw_ostream &O) {
539  printThumbAddrModeImm5SOperand(MI, Op, O, 4);
540}
541
542void ARMInstPrinter::printThumbAddrModeSPOperand(const MCInst *MI, unsigned Op,
543                                                 raw_ostream &O) {
544  printThumbAddrModeImm5SOperand(MI, Op, O, 4);
545}
546
547// Constant shifts t2_so_reg is a 2-operand unit corresponding to the Thumb2
548// register with shift forms.
549// REG 0   0           - e.g. R5
550// REG IMM, SH_OPC     - e.g. R5, LSL #3
551void ARMInstPrinter::printT2SOOperand(const MCInst *MI, unsigned OpNum,
552                                      raw_ostream &O) {
553  const MCOperand &MO1 = MI->getOperand(OpNum);
554  const MCOperand &MO2 = MI->getOperand(OpNum+1);
555
556  unsigned Reg = MO1.getReg();
557  O << getRegisterName(Reg);
558
559  // Print the shift opc.
560  assert(MO2.isImm() && "Not a valid t2_so_reg value!");
561  ARM_AM::ShiftOpc ShOpc = ARM_AM::getSORegShOp(MO2.getImm());
562  O << ", " << ARM_AM::getShiftOpcStr(ShOpc);
563  if (ShOpc != ARM_AM::rrx)
564    O << " #" << ARM_AM::getSORegOffset(MO2.getImm());
565}
566
567void ARMInstPrinter::printAddrModeImm12Operand(const MCInst *MI, unsigned OpNum,
568                                               raw_ostream &O) {
569  const MCOperand &MO1 = MI->getOperand(OpNum);
570  const MCOperand &MO2 = MI->getOperand(OpNum+1);
571
572  if (!MO1.isReg()) {   // FIXME: This is for CP entries, but isn't right.
573    printOperand(MI, OpNum, O);
574    return;
575  }
576
577  O << "[" << getRegisterName(MO1.getReg());
578
579  int32_t OffImm = (int32_t)MO2.getImm();
580  bool isSub = OffImm < 0;
581  // Special value for #-0. All others are normal.
582  if (OffImm == INT32_MIN)
583    OffImm = 0;
584  if (isSub)
585    O << ", #-" << -OffImm;
586  else if (OffImm > 0)
587    O << ", #" << OffImm;
588  O << "]";
589}
590
591void ARMInstPrinter::printT2AddrModeImm8Operand(const MCInst *MI,
592                                                unsigned OpNum,
593                                                raw_ostream &O) {
594  const MCOperand &MO1 = MI->getOperand(OpNum);
595  const MCOperand &MO2 = MI->getOperand(OpNum+1);
596
597  O << "[" << getRegisterName(MO1.getReg());
598
599  int32_t OffImm = (int32_t)MO2.getImm();
600  // Don't print +0.
601  if (OffImm < 0)
602    O << ", #-" << -OffImm;
603  else if (OffImm > 0)
604    O << ", #" << OffImm;
605  O << "]";
606}
607
608void ARMInstPrinter::printT2AddrModeImm8s4Operand(const MCInst *MI,
609                                                  unsigned OpNum,
610                                                  raw_ostream &O) {
611  const MCOperand &MO1 = MI->getOperand(OpNum);
612  const MCOperand &MO2 = MI->getOperand(OpNum+1);
613
614  O << "[" << getRegisterName(MO1.getReg());
615
616  int32_t OffImm = (int32_t)MO2.getImm() / 4;
617  // Don't print +0.
618  if (OffImm < 0)
619    O << ", #-" << -OffImm * 4;
620  else if (OffImm > 0)
621    O << ", #" << OffImm * 4;
622  O << "]";
623}
624
625void ARMInstPrinter::printT2AddrModeImm8OffsetOperand(const MCInst *MI,
626                                                      unsigned OpNum,
627                                                      raw_ostream &O) {
628  const MCOperand &MO1 = MI->getOperand(OpNum);
629  int32_t OffImm = (int32_t)MO1.getImm();
630  // Don't print +0.
631  if (OffImm < 0)
632    O << "#-" << -OffImm;
633  else if (OffImm > 0)
634    O << "#" << OffImm;
635}
636
637void ARMInstPrinter::printT2AddrModeImm8s4OffsetOperand(const MCInst *MI,
638                                                        unsigned OpNum,
639                                                        raw_ostream &O) {
640  const MCOperand &MO1 = MI->getOperand(OpNum);
641  int32_t OffImm = (int32_t)MO1.getImm() / 4;
642  // Don't print +0.
643  if (OffImm < 0)
644    O << "#-" << -OffImm * 4;
645  else if (OffImm > 0)
646    O << "#" << OffImm * 4;
647}
648
649void ARMInstPrinter::printT2AddrModeSoRegOperand(const MCInst *MI,
650                                                 unsigned OpNum,
651                                                 raw_ostream &O) {
652  const MCOperand &MO1 = MI->getOperand(OpNum);
653  const MCOperand &MO2 = MI->getOperand(OpNum+1);
654  const MCOperand &MO3 = MI->getOperand(OpNum+2);
655
656  O << "[" << getRegisterName(MO1.getReg());
657
658  assert(MO2.getReg() && "Invalid so_reg load / store address!");
659  O << ", " << getRegisterName(MO2.getReg());
660
661  unsigned ShAmt = MO3.getImm();
662  if (ShAmt) {
663    assert(ShAmt <= 3 && "Not a valid Thumb2 addressing mode!");
664    O << ", lsl #" << ShAmt;
665  }
666  O << "]";
667}
668
669void ARMInstPrinter::printVFPf32ImmOperand(const MCInst *MI, unsigned OpNum,
670                                           raw_ostream &O) {
671  const MCOperand &MO = MI->getOperand(OpNum);
672  O << '#';
673  if (MO.isFPImm()) {
674    O << (float)MO.getFPImm();
675  } else {
676    union {
677      uint32_t I;
678      float F;
679    } FPUnion;
680
681    FPUnion.I = MO.getImm();
682    O << FPUnion.F;
683  }
684}
685
686void ARMInstPrinter::printVFPf64ImmOperand(const MCInst *MI, unsigned OpNum,
687                                           raw_ostream &O) {
688  const MCOperand &MO = MI->getOperand(OpNum);
689  O << '#';
690  if (MO.isFPImm()) {
691    O << MO.getFPImm();
692  } else {
693    // We expect the binary encoding of a floating point number here.
694    union {
695      uint64_t I;
696      double D;
697    } FPUnion;
698
699    FPUnion.I = MO.getImm();
700    O << FPUnion.D;
701  }
702}
703
704void ARMInstPrinter::printNEONModImmOperand(const MCInst *MI, unsigned OpNum,
705                                            raw_ostream &O) {
706  unsigned EncodedImm = MI->getOperand(OpNum).getImm();
707  unsigned EltBits;
708  uint64_t Val = ARM_AM::decodeNEONModImm(EncodedImm, EltBits);
709  O << "#0x" << utohexstr(Val);
710}
711