1 //===-- ARM/ARMMCCodeEmitter.cpp - Convert ARM code to machine code -------===//
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 file implements the ARMMCCodeEmitter class.
12 //===----------------------------------------------------------------------===//
14 #define DEBUG_TYPE "mccodeemitter"
15 #include "MCTargetDesc/ARMAddressingModes.h"
16 #include "MCTargetDesc/ARMBaseInfo.h"
17 #include "MCTargetDesc/ARMFixupKinds.h"
18 #include "MCTargetDesc/ARMMCExpr.h"
19 #include "MCTargetDesc/ARMMCTargetDesc.h"
20 #include "llvm/MC/MCCodeEmitter.h"
21 #include "llvm/MC/MCExpr.h"
22 #include "llvm/MC/MCInst.h"
23 #include "llvm/MC/MCInstrInfo.h"
24 #include "llvm/MC/MCRegisterInfo.h"
25 #include "llvm/MC/MCSubtargetInfo.h"
26 #include "llvm/ADT/APFloat.h"
27 #include "llvm/ADT/Statistic.h"
28 #include "llvm/Support/raw_ostream.h"
32 STATISTIC(MCNumEmitted, "Number of MC instructions emitted.");
33 STATISTIC(MCNumCPRelocations, "Number of constant pool relocations created.");
36 class ARMMCCodeEmitter : public MCCodeEmitter {
37 ARMMCCodeEmitter(const ARMMCCodeEmitter &); // DO NOT IMPLEMENT
38 void operator=(const ARMMCCodeEmitter &); // DO NOT IMPLEMENT
39 const MCInstrInfo &MCII;
40 const MCSubtargetInfo &STI;
43 ARMMCCodeEmitter(const MCInstrInfo &mcii, const MCSubtargetInfo &sti,
45 : MCII(mcii), STI(sti) {
48 ~ARMMCCodeEmitter() {}
50 bool isThumb() const {
51 // FIXME: Can tablegen auto-generate this?
52 return (STI.getFeatureBits() & ARM::ModeThumb) != 0;
54 bool isThumb2() const {
55 return isThumb() && (STI.getFeatureBits() & ARM::FeatureThumb2) != 0;
57 bool isTargetDarwin() const {
58 Triple TT(STI.getTargetTriple());
59 Triple::OSType OS = TT.getOS();
60 return OS == Triple::Darwin || OS == Triple::MacOSX || OS == Triple::IOS;
63 unsigned getMachineSoImmOpValue(unsigned SoImm) const;
65 // getBinaryCodeForInstr - TableGen'erated function for getting the
66 // binary encoding for an instruction.
67 unsigned getBinaryCodeForInstr(const MCInst &MI,
68 SmallVectorImpl<MCFixup> &Fixups) const;
70 /// getMachineOpValue - Return binary encoding of operand. If the machine
71 /// operand requires relocation, record the relocation and return zero.
72 unsigned getMachineOpValue(const MCInst &MI,const MCOperand &MO,
73 SmallVectorImpl<MCFixup> &Fixups) const;
75 /// getHiLo16ImmOpValue - Return the encoding for the hi / low 16-bit of
76 /// the specified operand. This is used for operands with :lower16: and
77 /// :upper16: prefixes.
78 uint32_t getHiLo16ImmOpValue(const MCInst &MI, unsigned OpIdx,
79 SmallVectorImpl<MCFixup> &Fixups) const;
81 bool EncodeAddrModeOpValues(const MCInst &MI, unsigned OpIdx,
82 unsigned &Reg, unsigned &Imm,
83 SmallVectorImpl<MCFixup> &Fixups) const;
85 /// getThumbBLTargetOpValue - Return encoding info for Thumb immediate
87 uint32_t getThumbBLTargetOpValue(const MCInst &MI, unsigned OpIdx,
88 SmallVectorImpl<MCFixup> &Fixups) const;
90 /// getThumbBLXTargetOpValue - Return encoding info for Thumb immediate
91 /// BLX branch target.
92 uint32_t getThumbBLXTargetOpValue(const MCInst &MI, unsigned OpIdx,
93 SmallVectorImpl<MCFixup> &Fixups) const;
95 /// getThumbBRTargetOpValue - Return encoding info for Thumb branch target.
96 uint32_t getThumbBRTargetOpValue(const MCInst &MI, unsigned OpIdx,
97 SmallVectorImpl<MCFixup> &Fixups) const;
99 /// getThumbBCCTargetOpValue - Return encoding info for Thumb branch target.
100 uint32_t getThumbBCCTargetOpValue(const MCInst &MI, unsigned OpIdx,
101 SmallVectorImpl<MCFixup> &Fixups) const;
103 /// getThumbCBTargetOpValue - Return encoding info for Thumb branch target.
104 uint32_t getThumbCBTargetOpValue(const MCInst &MI, unsigned OpIdx,
105 SmallVectorImpl<MCFixup> &Fixups) const;
107 /// getBranchTargetOpValue - Return encoding info for 24-bit immediate
109 uint32_t getBranchTargetOpValue(const MCInst &MI, unsigned OpIdx,
110 SmallVectorImpl<MCFixup> &Fixups) const;
112 /// getUnconditionalBranchTargetOpValue - Return encoding info for 24-bit
113 /// immediate Thumb2 direct branch target.
114 uint32_t getUnconditionalBranchTargetOpValue(const MCInst &MI, unsigned OpIdx,
115 SmallVectorImpl<MCFixup> &Fixups) const;
117 /// getARMBranchTargetOpValue - Return encoding info for 24-bit immediate
119 uint32_t getARMBranchTargetOpValue(const MCInst &MI, unsigned OpIdx,
120 SmallVectorImpl<MCFixup> &Fixups) const;
122 /// getAdrLabelOpValue - Return encoding info for 12-bit immediate
123 /// ADR label target.
124 uint32_t getAdrLabelOpValue(const MCInst &MI, unsigned OpIdx,
125 SmallVectorImpl<MCFixup> &Fixups) const;
126 uint32_t getThumbAdrLabelOpValue(const MCInst &MI, unsigned OpIdx,
127 SmallVectorImpl<MCFixup> &Fixups) const;
128 uint32_t getT2AdrLabelOpValue(const MCInst &MI, unsigned OpIdx,
129 SmallVectorImpl<MCFixup> &Fixups) const;
132 /// getAddrModeImm12OpValue - Return encoding info for 'reg +/- imm12'
134 uint32_t getAddrModeImm12OpValue(const MCInst &MI, unsigned OpIdx,
135 SmallVectorImpl<MCFixup> &Fixups) const;
137 /// getThumbAddrModeRegRegOpValue - Return encoding for 'reg + reg' operand.
138 uint32_t getThumbAddrModeRegRegOpValue(const MCInst &MI, unsigned OpIdx,
139 SmallVectorImpl<MCFixup> &Fixups)const;
141 /// getT2AddrModeImm8s4OpValue - Return encoding info for 'reg +/- imm8<<2'
143 uint32_t getT2AddrModeImm8s4OpValue(const MCInst &MI, unsigned OpIdx,
144 SmallVectorImpl<MCFixup> &Fixups) const;
147 /// getLdStSORegOpValue - Return encoding info for 'reg +/- reg shop imm'
148 /// operand as needed by load/store instructions.
149 uint32_t getLdStSORegOpValue(const MCInst &MI, unsigned OpIdx,
150 SmallVectorImpl<MCFixup> &Fixups) const;
152 /// getLdStmModeOpValue - Return encoding for load/store multiple mode.
153 uint32_t getLdStmModeOpValue(const MCInst &MI, unsigned OpIdx,
154 SmallVectorImpl<MCFixup> &Fixups) const {
155 ARM_AM::AMSubMode Mode = (ARM_AM::AMSubMode)MI.getOperand(OpIdx).getImm();
157 default: assert(0 && "Unknown addressing sub-mode!");
158 case ARM_AM::da: return 0;
159 case ARM_AM::ia: return 1;
160 case ARM_AM::db: return 2;
161 case ARM_AM::ib: return 3;
164 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
166 unsigned getShiftOp(ARM_AM::ShiftOpc ShOpc) const {
168 default: llvm_unreachable("Unknown shift opc!");
169 case ARM_AM::no_shift:
170 case ARM_AM::lsl: return 0;
171 case ARM_AM::lsr: return 1;
172 case ARM_AM::asr: return 2;
174 case ARM_AM::rrx: return 3;
179 /// getAddrMode2OpValue - Return encoding for addrmode2 operands.
180 uint32_t getAddrMode2OpValue(const MCInst &MI, unsigned OpIdx,
181 SmallVectorImpl<MCFixup> &Fixups) const;
183 /// getAddrMode2OffsetOpValue - Return encoding for am2offset operands.
184 uint32_t getAddrMode2OffsetOpValue(const MCInst &MI, unsigned OpIdx,
185 SmallVectorImpl<MCFixup> &Fixups) const;
187 /// getPostIdxRegOpValue - Return encoding for postidx_reg operands.
188 uint32_t getPostIdxRegOpValue(const MCInst &MI, unsigned OpIdx,
189 SmallVectorImpl<MCFixup> &Fixups) const;
191 /// getAddrMode3OffsetOpValue - Return encoding for am3offset operands.
192 uint32_t getAddrMode3OffsetOpValue(const MCInst &MI, unsigned OpIdx,
193 SmallVectorImpl<MCFixup> &Fixups) const;
195 /// getAddrMode3OpValue - Return encoding for addrmode3 operands.
196 uint32_t getAddrMode3OpValue(const MCInst &MI, unsigned OpIdx,
197 SmallVectorImpl<MCFixup> &Fixups) const;
199 /// getAddrModeThumbSPOpValue - Return encoding info for 'reg +/- imm12'
201 uint32_t getAddrModeThumbSPOpValue(const MCInst &MI, unsigned OpIdx,
202 SmallVectorImpl<MCFixup> &Fixups) const;
204 /// getAddrModeISOpValue - Encode the t_addrmode_is# operands.
205 uint32_t getAddrModeISOpValue(const MCInst &MI, unsigned OpIdx,
206 SmallVectorImpl<MCFixup> &Fixups) const;
208 /// getAddrModePCOpValue - Return encoding for t_addrmode_pc operands.
209 uint32_t getAddrModePCOpValue(const MCInst &MI, unsigned OpIdx,
210 SmallVectorImpl<MCFixup> &Fixups) const;
212 /// getAddrMode5OpValue - Return encoding info for 'reg +/- imm8' operand.
213 uint32_t getAddrMode5OpValue(const MCInst &MI, unsigned OpIdx,
214 SmallVectorImpl<MCFixup> &Fixups) const;
216 /// getCCOutOpValue - Return encoding of the 's' bit.
217 unsigned getCCOutOpValue(const MCInst &MI, unsigned Op,
218 SmallVectorImpl<MCFixup> &Fixups) const {
219 // The operand is either reg0 or CPSR. The 's' bit is encoded as '0' or
221 return MI.getOperand(Op).getReg() == ARM::CPSR;
224 /// getSOImmOpValue - Return an encoded 12-bit shifted-immediate value.
225 unsigned getSOImmOpValue(const MCInst &MI, unsigned Op,
226 SmallVectorImpl<MCFixup> &Fixups) const {
227 unsigned SoImm = MI.getOperand(Op).getImm();
228 int SoImmVal = ARM_AM::getSOImmVal(SoImm);
229 assert(SoImmVal != -1 && "Not a valid so_imm value!");
231 // Encode rotate_imm.
232 unsigned Binary = (ARM_AM::getSOImmValRot((unsigned)SoImmVal) >> 1)
233 << ARMII::SoRotImmShift;
236 Binary |= ARM_AM::getSOImmValImm((unsigned)SoImmVal);
240 /// getT2SOImmOpValue - Return an encoded 12-bit shifted-immediate value.
241 unsigned getT2SOImmOpValue(const MCInst &MI, unsigned Op,
242 SmallVectorImpl<MCFixup> &Fixups) const {
243 unsigned SoImm = MI.getOperand(Op).getImm();
244 unsigned Encoded = ARM_AM::getT2SOImmVal(SoImm);
245 assert(Encoded != ~0U && "Not a Thumb2 so_imm value?");
249 unsigned getT2AddrModeSORegOpValue(const MCInst &MI, unsigned OpNum,
250 SmallVectorImpl<MCFixup> &Fixups) const;
251 unsigned getT2AddrModeImm8OpValue(const MCInst &MI, unsigned OpNum,
252 SmallVectorImpl<MCFixup> &Fixups) const;
253 unsigned getT2AddrModeImm8OffsetOpValue(const MCInst &MI, unsigned OpNum,
254 SmallVectorImpl<MCFixup> &Fixups) const;
255 unsigned getT2AddrModeImm12OffsetOpValue(const MCInst &MI, unsigned OpNum,
256 SmallVectorImpl<MCFixup> &Fixups) const;
258 /// getSORegOpValue - Return an encoded so_reg shifted register value.
259 unsigned getSORegRegOpValue(const MCInst &MI, unsigned Op,
260 SmallVectorImpl<MCFixup> &Fixups) const;
261 unsigned getSORegImmOpValue(const MCInst &MI, unsigned Op,
262 SmallVectorImpl<MCFixup> &Fixups) const;
263 unsigned getT2SORegOpValue(const MCInst &MI, unsigned Op,
264 SmallVectorImpl<MCFixup> &Fixups) const;
266 unsigned getNEONVcvtImm32OpValue(const MCInst &MI, unsigned Op,
267 SmallVectorImpl<MCFixup> &Fixups) const {
268 return 64 - MI.getOperand(Op).getImm();
271 unsigned getBitfieldInvertedMaskOpValue(const MCInst &MI, unsigned Op,
272 SmallVectorImpl<MCFixup> &Fixups) const;
274 unsigned getMsbOpValue(const MCInst &MI, unsigned Op,
275 SmallVectorImpl<MCFixup> &Fixups) const;
277 unsigned getRegisterListOpValue(const MCInst &MI, unsigned Op,
278 SmallVectorImpl<MCFixup> &Fixups) const;
279 unsigned getAddrMode6AddressOpValue(const MCInst &MI, unsigned Op,
280 SmallVectorImpl<MCFixup> &Fixups) const;
281 unsigned getAddrMode6OneLane32AddressOpValue(const MCInst &MI, unsigned Op,
282 SmallVectorImpl<MCFixup> &Fixups) const;
283 unsigned getAddrMode6DupAddressOpValue(const MCInst &MI, unsigned Op,
284 SmallVectorImpl<MCFixup> &Fixups) const;
285 unsigned getAddrMode6OffsetOpValue(const MCInst &MI, unsigned Op,
286 SmallVectorImpl<MCFixup> &Fixups) const;
288 unsigned getShiftRight8Imm(const MCInst &MI, unsigned Op,
289 SmallVectorImpl<MCFixup> &Fixups) const;
290 unsigned getShiftRight16Imm(const MCInst &MI, unsigned Op,
291 SmallVectorImpl<MCFixup> &Fixups) const;
292 unsigned getShiftRight32Imm(const MCInst &MI, unsigned Op,
293 SmallVectorImpl<MCFixup> &Fixups) const;
294 unsigned getShiftRight64Imm(const MCInst &MI, unsigned Op,
295 SmallVectorImpl<MCFixup> &Fixups) const;
297 unsigned getThumbSRImmOpValue(const MCInst &MI, unsigned Op,
298 SmallVectorImpl<MCFixup> &Fixups) const;
300 unsigned NEONThumb2DataIPostEncoder(const MCInst &MI,
301 unsigned EncodedValue) const;
302 unsigned NEONThumb2LoadStorePostEncoder(const MCInst &MI,
303 unsigned EncodedValue) const;
304 unsigned NEONThumb2DupPostEncoder(const MCInst &MI,
305 unsigned EncodedValue) const;
307 unsigned VFPThumb2PostEncoder(const MCInst &MI,
308 unsigned EncodedValue) const;
310 void EmitByte(unsigned char C, raw_ostream &OS) const {
314 void EmitConstant(uint64_t Val, unsigned Size, raw_ostream &OS) const {
315 // Output the constant in little endian byte order.
316 for (unsigned i = 0; i != Size; ++i) {
317 EmitByte(Val & 255, OS);
322 void EncodeInstruction(const MCInst &MI, raw_ostream &OS,
323 SmallVectorImpl<MCFixup> &Fixups) const;
326 } // end anonymous namespace
328 MCCodeEmitter *llvm::createARMMCCodeEmitter(const MCInstrInfo &MCII,
329 const MCSubtargetInfo &STI,
331 return new ARMMCCodeEmitter(MCII, STI, Ctx);
334 /// NEONThumb2DataIPostEncoder - Post-process encoded NEON data-processing
335 /// instructions, and rewrite them to their Thumb2 form if we are currently in
337 unsigned ARMMCCodeEmitter::NEONThumb2DataIPostEncoder(const MCInst &MI,
338 unsigned EncodedValue) const {
340 // NEON Thumb2 data-processsing encodings are very simple: bit 24 is moved
341 // to bit 12 of the high half-word (i.e. bit 28), and bits 27-24 are
343 unsigned Bit24 = EncodedValue & 0x01000000;
344 unsigned Bit28 = Bit24 << 4;
345 EncodedValue &= 0xEFFFFFFF;
346 EncodedValue |= Bit28;
347 EncodedValue |= 0x0F000000;
353 /// NEONThumb2LoadStorePostEncoder - Post-process encoded NEON load/store
354 /// instructions, and rewrite them to their Thumb2 form if we are currently in
356 unsigned ARMMCCodeEmitter::NEONThumb2LoadStorePostEncoder(const MCInst &MI,
357 unsigned EncodedValue) const {
359 EncodedValue &= 0xF0FFFFFF;
360 EncodedValue |= 0x09000000;
366 /// NEONThumb2DupPostEncoder - Post-process encoded NEON vdup
367 /// instructions, and rewrite them to their Thumb2 form if we are currently in
369 unsigned ARMMCCodeEmitter::NEONThumb2DupPostEncoder(const MCInst &MI,
370 unsigned EncodedValue) const {
372 EncodedValue &= 0x00FFFFFF;
373 EncodedValue |= 0xEE000000;
379 /// VFPThumb2PostEncoder - Post-process encoded VFP instructions and rewrite
380 /// them to their Thumb2 form if we are currently in Thumb2 mode.
381 unsigned ARMMCCodeEmitter::
382 VFPThumb2PostEncoder(const MCInst &MI, unsigned EncodedValue) const {
384 EncodedValue &= 0x0FFFFFFF;
385 EncodedValue |= 0xE0000000;
390 /// getMachineOpValue - Return binary encoding of operand. If the machine
391 /// operand requires relocation, record the relocation and return zero.
392 unsigned ARMMCCodeEmitter::
393 getMachineOpValue(const MCInst &MI, const MCOperand &MO,
394 SmallVectorImpl<MCFixup> &Fixups) const {
396 unsigned Reg = MO.getReg();
397 unsigned RegNo = getARMRegisterNumbering(Reg);
399 // Q registers are encoded as 2x their register number.
403 case ARM::Q0: case ARM::Q1: case ARM::Q2: case ARM::Q3:
404 case ARM::Q4: case ARM::Q5: case ARM::Q6: case ARM::Q7:
405 case ARM::Q8: case ARM::Q9: case ARM::Q10: case ARM::Q11:
406 case ARM::Q12: case ARM::Q13: case ARM::Q14: case ARM::Q15:
409 } else if (MO.isImm()) {
410 return static_cast<unsigned>(MO.getImm());
411 } else if (MO.isFPImm()) {
412 return static_cast<unsigned>(APFloat(MO.getFPImm())
413 .bitcastToAPInt().getHiBits(32).getLimitedValue());
416 llvm_unreachable("Unable to encode MCOperand!");
420 /// getAddrModeImmOpValue - Return encoding info for 'reg +/- imm' operand.
421 bool ARMMCCodeEmitter::
422 EncodeAddrModeOpValues(const MCInst &MI, unsigned OpIdx, unsigned &Reg,
423 unsigned &Imm, SmallVectorImpl<MCFixup> &Fixups) const {
424 const MCOperand &MO = MI.getOperand(OpIdx);
425 const MCOperand &MO1 = MI.getOperand(OpIdx + 1);
427 Reg = getARMRegisterNumbering(MO.getReg());
429 int32_t SImm = MO1.getImm();
432 // Special value for #-0
433 if (SImm == INT32_MIN)
436 // Immediate is always encoded as positive. The 'U' bit controls add vs sub.
446 /// getBranchTargetOpValue - Helper function to get the branch target operand,
447 /// which is either an immediate or requires a fixup.
448 static uint32_t getBranchTargetOpValue(const MCInst &MI, unsigned OpIdx,
450 SmallVectorImpl<MCFixup> &Fixups) {
451 const MCOperand &MO = MI.getOperand(OpIdx);
453 // If the destination is an immediate, we have nothing to do.
454 if (MO.isImm()) return MO.getImm();
455 assert(MO.isExpr() && "Unexpected branch target type!");
456 const MCExpr *Expr = MO.getExpr();
457 MCFixupKind Kind = MCFixupKind(FixupKind);
458 Fixups.push_back(MCFixup::Create(0, Expr, Kind));
460 // All of the information is in the fixup.
464 /// getThumbBLTargetOpValue - Return encoding info for immediate branch target.
465 uint32_t ARMMCCodeEmitter::
466 getThumbBLTargetOpValue(const MCInst &MI, unsigned OpIdx,
467 SmallVectorImpl<MCFixup> &Fixups) const {
468 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_bl, Fixups);
471 /// getThumbBLXTargetOpValue - Return encoding info for Thumb immediate
472 /// BLX branch target.
473 uint32_t ARMMCCodeEmitter::
474 getThumbBLXTargetOpValue(const MCInst &MI, unsigned OpIdx,
475 SmallVectorImpl<MCFixup> &Fixups) const {
476 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_blx, Fixups);
479 /// getThumbBRTargetOpValue - Return encoding info for Thumb branch target.
480 uint32_t ARMMCCodeEmitter::
481 getThumbBRTargetOpValue(const MCInst &MI, unsigned OpIdx,
482 SmallVectorImpl<MCFixup> &Fixups) const {
483 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_br, Fixups);
486 /// getThumbBCCTargetOpValue - Return encoding info for Thumb branch target.
487 uint32_t ARMMCCodeEmitter::
488 getThumbBCCTargetOpValue(const MCInst &MI, unsigned OpIdx,
489 SmallVectorImpl<MCFixup> &Fixups) const {
490 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_bcc, Fixups);
493 /// getThumbCBTargetOpValue - Return encoding info for Thumb branch target.
494 uint32_t ARMMCCodeEmitter::
495 getThumbCBTargetOpValue(const MCInst &MI, unsigned OpIdx,
496 SmallVectorImpl<MCFixup> &Fixups) const {
497 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_cb, Fixups);
500 /// Return true if this branch has a non-always predication
501 static bool HasConditionalBranch(const MCInst &MI) {
502 int NumOp = MI.getNumOperands();
504 for (int i = 0; i < NumOp-1; ++i) {
505 const MCOperand &MCOp1 = MI.getOperand(i);
506 const MCOperand &MCOp2 = MI.getOperand(i + 1);
507 if (MCOp1.isImm() && MCOp2.isReg() &&
508 (MCOp2.getReg() == 0 || MCOp2.getReg() == ARM::CPSR)) {
509 if (ARMCC::CondCodes(MCOp1.getImm()) != ARMCC::AL)
517 /// getBranchTargetOpValue - Return encoding info for 24-bit immediate branch
519 uint32_t ARMMCCodeEmitter::
520 getBranchTargetOpValue(const MCInst &MI, unsigned OpIdx,
521 SmallVectorImpl<MCFixup> &Fixups) const {
522 // FIXME: This really, really shouldn't use TargetMachine. We don't want
523 // coupling between MC and TM anywhere we can help it.
526 ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_t2_condbranch, Fixups);
527 return getARMBranchTargetOpValue(MI, OpIdx, Fixups);
530 /// getBranchTargetOpValue - Return encoding info for 24-bit immediate branch
532 uint32_t ARMMCCodeEmitter::
533 getARMBranchTargetOpValue(const MCInst &MI, unsigned OpIdx,
534 SmallVectorImpl<MCFixup> &Fixups) const {
535 const MCOperand MO = MI.getOperand(OpIdx);
537 if (HasConditionalBranch(MI))
538 return ::getBranchTargetOpValue(MI, OpIdx,
539 ARM::fixup_arm_condbranch, Fixups);
540 return ::getBranchTargetOpValue(MI, OpIdx,
541 ARM::fixup_arm_uncondbranch, Fixups);
544 return MO.getImm() >> 2;
550 /// getUnconditionalBranchTargetOpValue - Return encoding info for 24-bit
551 /// immediate branch target.
552 uint32_t ARMMCCodeEmitter::
553 getUnconditionalBranchTargetOpValue(const MCInst &MI, unsigned OpIdx,
554 SmallVectorImpl<MCFixup> &Fixups) const {
556 ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_t2_uncondbranch, Fixups);
557 bool I = (Val & 0x800000);
558 bool J1 = (Val & 0x400000);
559 bool J2 = (Val & 0x200000);
573 /// getAdrLabelOpValue - Return encoding info for 12-bit immediate ADR label
575 uint32_t ARMMCCodeEmitter::
576 getAdrLabelOpValue(const MCInst &MI, unsigned OpIdx,
577 SmallVectorImpl<MCFixup> &Fixups) const {
578 const MCOperand MO = MI.getOperand(OpIdx);
580 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_adr_pcrel_12,
582 int32_t offset = MO.getImm();
583 uint32_t Val = 0x2000;
592 /// getAdrLabelOpValue - Return encoding info for 12-bit immediate ADR label
594 uint32_t ARMMCCodeEmitter::
595 getT2AdrLabelOpValue(const MCInst &MI, unsigned OpIdx,
596 SmallVectorImpl<MCFixup> &Fixups) const {
597 const MCOperand MO = MI.getOperand(OpIdx);
599 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_t2_adr_pcrel_12,
604 /// getAdrLabelOpValue - Return encoding info for 8-bit immediate ADR label
606 uint32_t ARMMCCodeEmitter::
607 getThumbAdrLabelOpValue(const MCInst &MI, unsigned OpIdx,
608 SmallVectorImpl<MCFixup> &Fixups) const {
609 const MCOperand MO = MI.getOperand(OpIdx);
611 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_thumb_adr_pcrel_10,
616 /// getThumbAddrModeRegRegOpValue - Return encoding info for 'reg + reg'
618 uint32_t ARMMCCodeEmitter::
619 getThumbAddrModeRegRegOpValue(const MCInst &MI, unsigned OpIdx,
620 SmallVectorImpl<MCFixup> &) const {
624 const MCOperand &MO1 = MI.getOperand(OpIdx);
625 const MCOperand &MO2 = MI.getOperand(OpIdx + 1);
626 unsigned Rn = getARMRegisterNumbering(MO1.getReg());
627 unsigned Rm = getARMRegisterNumbering(MO2.getReg());
628 return (Rm << 3) | Rn;
631 /// getAddrModeImm12OpValue - Return encoding info for 'reg +/- imm12' operand.
632 uint32_t ARMMCCodeEmitter::
633 getAddrModeImm12OpValue(const MCInst &MI, unsigned OpIdx,
634 SmallVectorImpl<MCFixup> &Fixups) const {
636 // {12} = (U)nsigned (add == '1', sub == '0')
640 // If The first operand isn't a register, we have a label reference.
641 const MCOperand &MO = MI.getOperand(OpIdx);
643 Reg = getARMRegisterNumbering(ARM::PC); // Rn is PC.
645 isAdd = false ; // 'U' bit is set as part of the fixup.
647 assert(MO.isExpr() && "Unexpected machine operand type!");
648 const MCExpr *Expr = MO.getExpr();
652 Kind = MCFixupKind(ARM::fixup_t2_ldst_pcrel_12);
654 Kind = MCFixupKind(ARM::fixup_arm_ldst_pcrel_12);
655 Fixups.push_back(MCFixup::Create(0, Expr, Kind));
657 ++MCNumCPRelocations;
659 isAdd = EncodeAddrModeOpValues(MI, OpIdx, Reg, Imm12, Fixups);
661 uint32_t Binary = Imm12 & 0xfff;
662 // Immediate is always encoded as positive. The 'U' bit controls add vs sub.
665 Binary |= (Reg << 13);
669 /// getT2AddrModeImm8s4OpValue - Return encoding info for
670 /// 'reg +/- imm8<<2' operand.
671 uint32_t ARMMCCodeEmitter::
672 getT2AddrModeImm8s4OpValue(const MCInst &MI, unsigned OpIdx,
673 SmallVectorImpl<MCFixup> &Fixups) const {
675 // {8} = (U)nsigned (add == '1', sub == '0')
679 // If The first operand isn't a register, we have a label reference.
680 const MCOperand &MO = MI.getOperand(OpIdx);
682 Reg = getARMRegisterNumbering(ARM::PC); // Rn is PC.
684 isAdd = false ; // 'U' bit is set as part of the fixup.
686 assert(MO.isExpr() && "Unexpected machine operand type!");
687 const MCExpr *Expr = MO.getExpr();
688 MCFixupKind Kind = MCFixupKind(ARM::fixup_arm_pcrel_10);
689 Fixups.push_back(MCFixup::Create(0, Expr, Kind));
691 ++MCNumCPRelocations;
693 isAdd = EncodeAddrModeOpValues(MI, OpIdx, Reg, Imm8, Fixups);
695 uint32_t Binary = (Imm8 >> 2) & 0xff;
696 // Immediate is always encoded as positive. The 'U' bit controls add vs sub.
699 Binary |= (Reg << 9);
703 // FIXME: This routine assumes that a binary
704 // expression will always result in a PCRel expression
705 // In reality, its only true if one or more subexpressions
706 // is itself a PCRel (i.e. "." in asm or some other pcrel construct)
707 // but this is good enough for now.
708 static bool EvaluateAsPCRel(const MCExpr *Expr) {
709 switch (Expr->getKind()) {
710 default: assert(0 && "Unexpected expression type");
711 case MCExpr::SymbolRef: return false;
712 case MCExpr::Binary: return true;
717 ARMMCCodeEmitter::getHiLo16ImmOpValue(const MCInst &MI, unsigned OpIdx,
718 SmallVectorImpl<MCFixup> &Fixups) const {
719 // {20-16} = imm{15-12}
720 // {11-0} = imm{11-0}
721 const MCOperand &MO = MI.getOperand(OpIdx);
723 // Hi / lo 16 bits already extracted during earlier passes.
724 return static_cast<unsigned>(MO.getImm());
726 // Handle :upper16: and :lower16: assembly prefixes.
727 const MCExpr *E = MO.getExpr();
728 if (E->getKind() == MCExpr::Target) {
729 const ARMMCExpr *ARM16Expr = cast<ARMMCExpr>(E);
730 E = ARM16Expr->getSubExpr();
733 switch (ARM16Expr->getKind()) {
734 default: assert(0 && "Unsupported ARMFixup");
735 case ARMMCExpr::VK_ARM_HI16:
736 if (!isTargetDarwin() && EvaluateAsPCRel(E))
737 Kind = MCFixupKind(isThumb2()
738 ? ARM::fixup_t2_movt_hi16_pcrel
739 : ARM::fixup_arm_movt_hi16_pcrel);
741 Kind = MCFixupKind(isThumb2()
742 ? ARM::fixup_t2_movt_hi16
743 : ARM::fixup_arm_movt_hi16);
745 case ARMMCExpr::VK_ARM_LO16:
746 if (!isTargetDarwin() && EvaluateAsPCRel(E))
747 Kind = MCFixupKind(isThumb2()
748 ? ARM::fixup_t2_movw_lo16_pcrel
749 : ARM::fixup_arm_movw_lo16_pcrel);
751 Kind = MCFixupKind(isThumb2()
752 ? ARM::fixup_t2_movw_lo16
753 : ARM::fixup_arm_movw_lo16);
756 Fixups.push_back(MCFixup::Create(0, E, Kind));
760 llvm_unreachable("Unsupported MCExpr type in MCOperand!");
764 uint32_t ARMMCCodeEmitter::
765 getLdStSORegOpValue(const MCInst &MI, unsigned OpIdx,
766 SmallVectorImpl<MCFixup> &Fixups) const {
767 const MCOperand &MO = MI.getOperand(OpIdx);
768 const MCOperand &MO1 = MI.getOperand(OpIdx+1);
769 const MCOperand &MO2 = MI.getOperand(OpIdx+2);
770 unsigned Rn = getARMRegisterNumbering(MO.getReg());
771 unsigned Rm = getARMRegisterNumbering(MO1.getReg());
772 unsigned ShImm = ARM_AM::getAM2Offset(MO2.getImm());
773 bool isAdd = ARM_AM::getAM2Op(MO2.getImm()) == ARM_AM::add;
774 ARM_AM::ShiftOpc ShOp = ARM_AM::getAM2ShiftOpc(MO2.getImm());
775 unsigned SBits = getShiftOp(ShOp);
784 uint32_t Binary = Rm;
786 Binary |= SBits << 5;
787 Binary |= ShImm << 7;
793 uint32_t ARMMCCodeEmitter::
794 getAddrMode2OpValue(const MCInst &MI, unsigned OpIdx,
795 SmallVectorImpl<MCFixup> &Fixups) const {
797 // {13} 1 == imm12, 0 == Rm
800 const MCOperand &MO = MI.getOperand(OpIdx);
801 unsigned Rn = getARMRegisterNumbering(MO.getReg());
802 uint32_t Binary = getAddrMode2OffsetOpValue(MI, OpIdx + 1, Fixups);
807 uint32_t ARMMCCodeEmitter::
808 getAddrMode2OffsetOpValue(const MCInst &MI, unsigned OpIdx,
809 SmallVectorImpl<MCFixup> &Fixups) const {
810 // {13} 1 == imm12, 0 == Rm
813 const MCOperand &MO = MI.getOperand(OpIdx);
814 const MCOperand &MO1 = MI.getOperand(OpIdx+1);
815 unsigned Imm = MO1.getImm();
816 bool isAdd = ARM_AM::getAM2Op(Imm) == ARM_AM::add;
817 bool isReg = MO.getReg() != 0;
818 uint32_t Binary = ARM_AM::getAM2Offset(Imm);
819 // if reg +/- reg, Rm will be non-zero. Otherwise, we have reg +/- imm12
821 ARM_AM::ShiftOpc ShOp = ARM_AM::getAM2ShiftOpc(Imm);
822 Binary <<= 7; // Shift amount is bits [11:7]
823 Binary |= getShiftOp(ShOp) << 5; // Shift type is bits [6:5]
824 Binary |= getARMRegisterNumbering(MO.getReg()); // Rm is bits [3:0]
826 return Binary | (isAdd << 12) | (isReg << 13);
829 uint32_t ARMMCCodeEmitter::
830 getPostIdxRegOpValue(const MCInst &MI, unsigned OpIdx,
831 SmallVectorImpl<MCFixup> &Fixups) const {
834 const MCOperand &MO = MI.getOperand(OpIdx);
835 const MCOperand &MO1 = MI.getOperand(OpIdx+1);
836 bool isAdd = MO1.getImm() != 0;
837 return getARMRegisterNumbering(MO.getReg()) | (isAdd << 4);
840 uint32_t ARMMCCodeEmitter::
841 getAddrMode3OffsetOpValue(const MCInst &MI, unsigned OpIdx,
842 SmallVectorImpl<MCFixup> &Fixups) const {
843 // {9} 1 == imm8, 0 == Rm
847 const MCOperand &MO = MI.getOperand(OpIdx);
848 const MCOperand &MO1 = MI.getOperand(OpIdx+1);
849 unsigned Imm = MO1.getImm();
850 bool isAdd = ARM_AM::getAM3Op(Imm) == ARM_AM::add;
851 bool isImm = MO.getReg() == 0;
852 uint32_t Imm8 = ARM_AM::getAM3Offset(Imm);
853 // if reg +/- reg, Rm will be non-zero. Otherwise, we have reg +/- imm8
855 Imm8 = getARMRegisterNumbering(MO.getReg());
856 return Imm8 | (isAdd << 8) | (isImm << 9);
859 uint32_t ARMMCCodeEmitter::
860 getAddrMode3OpValue(const MCInst &MI, unsigned OpIdx,
861 SmallVectorImpl<MCFixup> &Fixups) const {
862 // {13} 1 == imm8, 0 == Rm
867 const MCOperand &MO = MI.getOperand(OpIdx);
868 const MCOperand &MO1 = MI.getOperand(OpIdx+1);
869 const MCOperand &MO2 = MI.getOperand(OpIdx+2);
870 unsigned Rn = getARMRegisterNumbering(MO.getReg());
871 unsigned Imm = MO2.getImm();
872 bool isAdd = ARM_AM::getAM3Op(Imm) == ARM_AM::add;
873 bool isImm = MO1.getReg() == 0;
874 uint32_t Imm8 = ARM_AM::getAM3Offset(Imm);
875 // if reg +/- reg, Rm will be non-zero. Otherwise, we have reg +/- imm8
877 Imm8 = getARMRegisterNumbering(MO1.getReg());
878 return (Rn << 9) | Imm8 | (isAdd << 8) | (isImm << 13);
881 /// getAddrModeThumbSPOpValue - Encode the t_addrmode_sp operands.
882 uint32_t ARMMCCodeEmitter::
883 getAddrModeThumbSPOpValue(const MCInst &MI, unsigned OpIdx,
884 SmallVectorImpl<MCFixup> &Fixups) const {
887 const MCOperand &MO1 = MI.getOperand(OpIdx + 1);
888 assert(MI.getOperand(OpIdx).getReg() == ARM::SP &&
889 "Unexpected base register!");
891 // The immediate is already shifted for the implicit zeroes, so no change
893 return MO1.getImm() & 0xff;
896 /// getAddrModeISOpValue - Encode the t_addrmode_is# operands.
897 uint32_t ARMMCCodeEmitter::
898 getAddrModeISOpValue(const MCInst &MI, unsigned OpIdx,
899 SmallVectorImpl<MCFixup> &Fixups) const {
903 const MCOperand &MO = MI.getOperand(OpIdx);
904 const MCOperand &MO1 = MI.getOperand(OpIdx + 1);
905 unsigned Rn = getARMRegisterNumbering(MO.getReg());
906 unsigned Imm5 = MO1.getImm();
907 return ((Imm5 & 0x1f) << 3) | Rn;
910 /// getAddrModePCOpValue - Return encoding for t_addrmode_pc operands.
911 uint32_t ARMMCCodeEmitter::
912 getAddrModePCOpValue(const MCInst &MI, unsigned OpIdx,
913 SmallVectorImpl<MCFixup> &Fixups) const {
914 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_cp, Fixups);
917 /// getAddrMode5OpValue - Return encoding info for 'reg +/- imm10' operand.
918 uint32_t ARMMCCodeEmitter::
919 getAddrMode5OpValue(const MCInst &MI, unsigned OpIdx,
920 SmallVectorImpl<MCFixup> &Fixups) const {
922 // {8} = (U)nsigned (add == '1', sub == '0')
926 // If The first operand isn't a register, we have a label reference.
927 const MCOperand &MO = MI.getOperand(OpIdx);
929 Reg = getARMRegisterNumbering(ARM::PC); // Rn is PC.
931 isAdd = false; // 'U' bit is handled as part of the fixup.
933 assert(MO.isExpr() && "Unexpected machine operand type!");
934 const MCExpr *Expr = MO.getExpr();
937 Kind = MCFixupKind(ARM::fixup_t2_pcrel_10);
939 Kind = MCFixupKind(ARM::fixup_arm_pcrel_10);
940 Fixups.push_back(MCFixup::Create(0, Expr, Kind));
942 ++MCNumCPRelocations;
944 EncodeAddrModeOpValues(MI, OpIdx, Reg, Imm8, Fixups);
945 isAdd = ARM_AM::getAM5Op(Imm8) == ARM_AM::add;
948 uint32_t Binary = ARM_AM::getAM5Offset(Imm8);
949 // Immediate is always encoded as positive. The 'U' bit controls add vs sub.
952 Binary |= (Reg << 9);
956 unsigned ARMMCCodeEmitter::
957 getSORegRegOpValue(const MCInst &MI, unsigned OpIdx,
958 SmallVectorImpl<MCFixup> &Fixups) const {
959 // Sub-operands are [reg, reg, imm]. The first register is Rm, the reg to be
960 // shifted. The second is Rs, the amount to shift by, and the third specifies
961 // the type of the shift.
969 const MCOperand &MO = MI.getOperand(OpIdx);
970 const MCOperand &MO1 = MI.getOperand(OpIdx + 1);
971 const MCOperand &MO2 = MI.getOperand(OpIdx + 2);
972 ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO2.getImm());
975 unsigned Binary = getARMRegisterNumbering(MO.getReg());
977 // Encode the shift opcode.
979 unsigned Rs = MO1.getReg();
981 // Set shift operand (bit[7:4]).
987 default: llvm_unreachable("Unknown shift opc!");
988 case ARM_AM::lsl: SBits = 0x1; break;
989 case ARM_AM::lsr: SBits = 0x3; break;
990 case ARM_AM::asr: SBits = 0x5; break;
991 case ARM_AM::ror: SBits = 0x7; break;
995 Binary |= SBits << 4;
997 // Encode the shift operation Rs.
998 // Encode Rs bit[11:8].
999 assert(ARM_AM::getSORegOffset(MO2.getImm()) == 0);
1000 return Binary | (getARMRegisterNumbering(Rs) << ARMII::RegRsShift);
1003 unsigned ARMMCCodeEmitter::
1004 getSORegImmOpValue(const MCInst &MI, unsigned OpIdx,
1005 SmallVectorImpl<MCFixup> &Fixups) const {
1006 // Sub-operands are [reg, imm]. The first register is Rm, the reg to be
1007 // shifted. The second is the amount to shift by.
1014 const MCOperand &MO = MI.getOperand(OpIdx);
1015 const MCOperand &MO1 = MI.getOperand(OpIdx + 1);
1016 ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO1.getImm());
1019 unsigned Binary = getARMRegisterNumbering(MO.getReg());
1021 // Encode the shift opcode.
1024 // Set shift operand (bit[6:4]).
1029 // RRX - 110 and bit[11:8] clear.
1031 default: llvm_unreachable("Unknown shift opc!");
1032 case ARM_AM::lsl: SBits = 0x0; break;
1033 case ARM_AM::lsr: SBits = 0x2; break;
1034 case ARM_AM::asr: SBits = 0x4; break;
1035 case ARM_AM::ror: SBits = 0x6; break;
1041 // Encode shift_imm bit[11:7].
1042 Binary |= SBits << 4;
1043 unsigned Offset = ARM_AM::getSORegOffset(MO1.getImm());
1044 assert(Offset && "Offset must be in range 1-32!");
1045 if (Offset == 32) Offset = 0;
1046 return Binary | (Offset << 7);
1050 unsigned ARMMCCodeEmitter::
1051 getT2AddrModeSORegOpValue(const MCInst &MI, unsigned OpNum,
1052 SmallVectorImpl<MCFixup> &Fixups) const {
1053 const MCOperand &MO1 = MI.getOperand(OpNum);
1054 const MCOperand &MO2 = MI.getOperand(OpNum+1);
1055 const MCOperand &MO3 = MI.getOperand(OpNum+2);
1057 // Encoded as [Rn, Rm, imm].
1058 // FIXME: Needs fixup support.
1059 unsigned Value = getARMRegisterNumbering(MO1.getReg());
1061 Value |= getARMRegisterNumbering(MO2.getReg());
1063 Value |= MO3.getImm();
1068 unsigned ARMMCCodeEmitter::
1069 getT2AddrModeImm8OpValue(const MCInst &MI, unsigned OpNum,
1070 SmallVectorImpl<MCFixup> &Fixups) const {
1071 const MCOperand &MO1 = MI.getOperand(OpNum);
1072 const MCOperand &MO2 = MI.getOperand(OpNum+1);
1074 // FIXME: Needs fixup support.
1075 unsigned Value = getARMRegisterNumbering(MO1.getReg());
1077 // Even though the immediate is 8 bits long, we need 9 bits in order
1078 // to represent the (inverse of the) sign bit.
1080 int32_t tmp = (int32_t)MO2.getImm();
1084 Value |= 256; // Set the ADD bit
1089 unsigned ARMMCCodeEmitter::
1090 getT2AddrModeImm8OffsetOpValue(const MCInst &MI, unsigned OpNum,
1091 SmallVectorImpl<MCFixup> &Fixups) const {
1092 const MCOperand &MO1 = MI.getOperand(OpNum);
1094 // FIXME: Needs fixup support.
1096 int32_t tmp = (int32_t)MO1.getImm();
1100 Value |= 256; // Set the ADD bit
1105 unsigned ARMMCCodeEmitter::
1106 getT2AddrModeImm12OffsetOpValue(const MCInst &MI, unsigned OpNum,
1107 SmallVectorImpl<MCFixup> &Fixups) const {
1108 const MCOperand &MO1 = MI.getOperand(OpNum);
1110 // FIXME: Needs fixup support.
1112 int32_t tmp = (int32_t)MO1.getImm();
1116 Value |= 4096; // Set the ADD bit
1117 Value |= tmp & 4095;
1121 unsigned ARMMCCodeEmitter::
1122 getT2SORegOpValue(const MCInst &MI, unsigned OpIdx,
1123 SmallVectorImpl<MCFixup> &Fixups) const {
1124 // Sub-operands are [reg, imm]. The first register is Rm, the reg to be
1125 // shifted. The second is the amount to shift by.
1132 const MCOperand &MO = MI.getOperand(OpIdx);
1133 const MCOperand &MO1 = MI.getOperand(OpIdx + 1);
1134 ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO1.getImm());
1137 unsigned Binary = getARMRegisterNumbering(MO.getReg());
1139 // Encode the shift opcode.
1141 // Set shift operand (bit[6:4]).
1147 default: llvm_unreachable("Unknown shift opc!");
1148 case ARM_AM::lsl: SBits = 0x0; break;
1149 case ARM_AM::lsr: SBits = 0x2; break;
1150 case ARM_AM::asr: SBits = 0x4; break;
1151 case ARM_AM::ror: SBits = 0x6; break;
1154 Binary |= SBits << 4;
1155 if (SOpc == ARM_AM::rrx)
1158 // Encode shift_imm bit[11:7].
1159 return Binary | ARM_AM::getSORegOffset(MO1.getImm()) << 7;
1162 unsigned ARMMCCodeEmitter::
1163 getBitfieldInvertedMaskOpValue(const MCInst &MI, unsigned Op,
1164 SmallVectorImpl<MCFixup> &Fixups) const {
1165 // 10 bits. lower 5 bits are are the lsb of the mask, high five bits are the
1167 const MCOperand &MO = MI.getOperand(Op);
1168 uint32_t v = ~MO.getImm();
1169 uint32_t lsb = CountTrailingZeros_32(v);
1170 uint32_t msb = (32 - CountLeadingZeros_32 (v)) - 1;
1171 assert (v != 0 && lsb < 32 && msb < 32 && "Illegal bitfield mask!");
1172 return lsb | (msb << 5);
1175 unsigned ARMMCCodeEmitter::
1176 getMsbOpValue(const MCInst &MI, unsigned Op,
1177 SmallVectorImpl<MCFixup> &Fixups) const {
1179 uint32_t lsb = MI.getOperand(Op-1).getImm();
1180 uint32_t width = MI.getOperand(Op).getImm();
1181 uint32_t msb = lsb+width-1;
1182 assert (width != 0 && msb < 32 && "Illegal bit width!");
1186 unsigned ARMMCCodeEmitter::
1187 getRegisterListOpValue(const MCInst &MI, unsigned Op,
1188 SmallVectorImpl<MCFixup> &Fixups) const {
1191 // {7-0} = Number of registers
1194 // {15-0} = Bitfield of GPRs.
1195 unsigned Reg = MI.getOperand(Op).getReg();
1196 bool SPRRegs = llvm::ARMMCRegisterClasses[ARM::SPRRegClassID].contains(Reg);
1197 bool DPRRegs = llvm::ARMMCRegisterClasses[ARM::DPRRegClassID].contains(Reg);
1199 unsigned Binary = 0;
1201 if (SPRRegs || DPRRegs) {
1203 unsigned RegNo = getARMRegisterNumbering(Reg);
1204 unsigned NumRegs = (MI.getNumOperands() - Op) & 0xff;
1205 Binary |= (RegNo & 0x1f) << 8;
1209 Binary |= NumRegs * 2;
1211 for (unsigned I = Op, E = MI.getNumOperands(); I < E; ++I) {
1212 unsigned RegNo = getARMRegisterNumbering(MI.getOperand(I).getReg());
1213 Binary |= 1 << RegNo;
1220 /// getAddrMode6AddressOpValue - Encode an addrmode6 register number along
1221 /// with the alignment operand.
1222 unsigned ARMMCCodeEmitter::
1223 getAddrMode6AddressOpValue(const MCInst &MI, unsigned Op,
1224 SmallVectorImpl<MCFixup> &Fixups) const {
1225 const MCOperand &Reg = MI.getOperand(Op);
1226 const MCOperand &Imm = MI.getOperand(Op + 1);
1228 unsigned RegNo = getARMRegisterNumbering(Reg.getReg());
1231 switch (Imm.getImm()) {
1235 case 8: Align = 0x01; break;
1236 case 16: Align = 0x02; break;
1237 case 32: Align = 0x03; break;
1240 return RegNo | (Align << 4);
1243 /// getAddrMode6OneLane32AddressOpValue - Encode an addrmode6 register number
1244 /// along with the alignment operand for use in VST1 and VLD1 with size 32.
1245 unsigned ARMMCCodeEmitter::
1246 getAddrMode6OneLane32AddressOpValue(const MCInst &MI, unsigned Op,
1247 SmallVectorImpl<MCFixup> &Fixups) const {
1248 const MCOperand &Reg = MI.getOperand(Op);
1249 const MCOperand &Imm = MI.getOperand(Op + 1);
1251 unsigned RegNo = getARMRegisterNumbering(Reg.getReg());
1254 switch (Imm.getImm()) {
1259 case 16: Align = 0x00; break;
1260 case 32: Align = 0x03; break;
1263 return RegNo | (Align << 4);
1267 /// getAddrMode6DupAddressOpValue - Encode an addrmode6 register number and
1268 /// alignment operand for use in VLD-dup instructions. This is the same as
1269 /// getAddrMode6AddressOpValue except for the alignment encoding, which is
1270 /// different for VLD4-dup.
1271 unsigned ARMMCCodeEmitter::
1272 getAddrMode6DupAddressOpValue(const MCInst &MI, unsigned Op,
1273 SmallVectorImpl<MCFixup> &Fixups) const {
1274 const MCOperand &Reg = MI.getOperand(Op);
1275 const MCOperand &Imm = MI.getOperand(Op + 1);
1277 unsigned RegNo = getARMRegisterNumbering(Reg.getReg());
1280 switch (Imm.getImm()) {
1284 case 8: Align = 0x01; break;
1285 case 16: Align = 0x03; break;
1288 return RegNo | (Align << 4);
1291 unsigned ARMMCCodeEmitter::
1292 getAddrMode6OffsetOpValue(const MCInst &MI, unsigned Op,
1293 SmallVectorImpl<MCFixup> &Fixups) const {
1294 const MCOperand &MO = MI.getOperand(Op);
1295 if (MO.getReg() == 0) return 0x0D;
1299 unsigned ARMMCCodeEmitter::
1300 getShiftRight8Imm(const MCInst &MI, unsigned Op,
1301 SmallVectorImpl<MCFixup> &Fixups) const {
1302 return 8 - MI.getOperand(Op).getImm();
1305 unsigned ARMMCCodeEmitter::
1306 getShiftRight16Imm(const MCInst &MI, unsigned Op,
1307 SmallVectorImpl<MCFixup> &Fixups) const {
1308 return 16 - MI.getOperand(Op).getImm();
1311 unsigned ARMMCCodeEmitter::
1312 getShiftRight32Imm(const MCInst &MI, unsigned Op,
1313 SmallVectorImpl<MCFixup> &Fixups) const {
1314 return 32 - MI.getOperand(Op).getImm();
1317 unsigned ARMMCCodeEmitter::
1318 getShiftRight64Imm(const MCInst &MI, unsigned Op,
1319 SmallVectorImpl<MCFixup> &Fixups) const {
1320 return 64 - MI.getOperand(Op).getImm();
1323 void ARMMCCodeEmitter::
1324 EncodeInstruction(const MCInst &MI, raw_ostream &OS,
1325 SmallVectorImpl<MCFixup> &Fixups) const {
1326 // Pseudo instructions don't get encoded.
1327 const MCInstrDesc &Desc = MCII.get(MI.getOpcode());
1328 uint64_t TSFlags = Desc.TSFlags;
1329 if ((TSFlags & ARMII::FormMask) == ARMII::Pseudo)
1333 if (Desc.getSize() == 2 || Desc.getSize() == 4)
1334 Size = Desc.getSize();
1336 llvm_unreachable("Unexpected instruction size!");
1338 uint32_t Binary = getBinaryCodeForInstr(MI, Fixups);
1339 // Thumb 32-bit wide instructions need to emit the high order halfword
1341 if (isThumb() && Size == 4) {
1342 EmitConstant(Binary >> 16, 2, OS);
1343 EmitConstant(Binary & 0xffff, 2, OS);
1345 EmitConstant(Binary, Size, OS);
1346 ++MCNumEmitted; // Keep track of the # of mi's emitted.
1349 #include "ARMGenMCCodeEmitter.inc"