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 uint32_t ARMMCCodeEmitter::
447 getThumbSRImmOpValue(const MCInst &MI, unsigned OpIdx,
448 SmallVectorImpl<MCFixup> &Fixups) const {
449 const MCOperand &MO = MI.getOperand(OpIdx);
450 assert(MO.isImm() && "Expected constant shift!");
451 int val = MO.getImm();
452 return (val == 32) ? 0 : val;
456 /// getBranchTargetOpValue - Helper function to get the branch target operand,
457 /// which is either an immediate or requires a fixup.
458 static uint32_t getBranchTargetOpValue(const MCInst &MI, unsigned OpIdx,
460 SmallVectorImpl<MCFixup> &Fixups) {
461 const MCOperand &MO = MI.getOperand(OpIdx);
463 // If the destination is an immediate, we have nothing to do.
464 if (MO.isImm()) return MO.getImm();
465 assert(MO.isExpr() && "Unexpected branch target type!");
466 const MCExpr *Expr = MO.getExpr();
467 MCFixupKind Kind = MCFixupKind(FixupKind);
468 Fixups.push_back(MCFixup::Create(0, Expr, Kind));
470 // All of the information is in the fixup.
474 /// getThumbBLTargetOpValue - Return encoding info for immediate branch target.
475 uint32_t ARMMCCodeEmitter::
476 getThumbBLTargetOpValue(const MCInst &MI, unsigned OpIdx,
477 SmallVectorImpl<MCFixup> &Fixups) const {
478 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_bl, Fixups);
481 /// getThumbBLXTargetOpValue - Return encoding info for Thumb immediate
482 /// BLX branch target.
483 uint32_t ARMMCCodeEmitter::
484 getThumbBLXTargetOpValue(const MCInst &MI, unsigned OpIdx,
485 SmallVectorImpl<MCFixup> &Fixups) const {
486 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_blx, Fixups);
489 /// getThumbBRTargetOpValue - Return encoding info for Thumb branch target.
490 uint32_t ARMMCCodeEmitter::
491 getThumbBRTargetOpValue(const MCInst &MI, unsigned OpIdx,
492 SmallVectorImpl<MCFixup> &Fixups) const {
493 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_br, Fixups);
496 /// getThumbBCCTargetOpValue - Return encoding info for Thumb branch target.
497 uint32_t ARMMCCodeEmitter::
498 getThumbBCCTargetOpValue(const MCInst &MI, unsigned OpIdx,
499 SmallVectorImpl<MCFixup> &Fixups) const {
500 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_bcc, Fixups);
503 /// getThumbCBTargetOpValue - Return encoding info for Thumb branch target.
504 uint32_t ARMMCCodeEmitter::
505 getThumbCBTargetOpValue(const MCInst &MI, unsigned OpIdx,
506 SmallVectorImpl<MCFixup> &Fixups) const {
507 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_cb, Fixups);
510 /// Return true if this branch has a non-always predication
511 static bool HasConditionalBranch(const MCInst &MI) {
512 int NumOp = MI.getNumOperands();
514 for (int i = 0; i < NumOp-1; ++i) {
515 const MCOperand &MCOp1 = MI.getOperand(i);
516 const MCOperand &MCOp2 = MI.getOperand(i + 1);
517 if (MCOp1.isImm() && MCOp2.isReg() &&
518 (MCOp2.getReg() == 0 || MCOp2.getReg() == ARM::CPSR)) {
519 if (ARMCC::CondCodes(MCOp1.getImm()) != ARMCC::AL)
527 /// getBranchTargetOpValue - Return encoding info for 24-bit immediate branch
529 uint32_t ARMMCCodeEmitter::
530 getBranchTargetOpValue(const MCInst &MI, unsigned OpIdx,
531 SmallVectorImpl<MCFixup> &Fixups) const {
532 // FIXME: This really, really shouldn't use TargetMachine. We don't want
533 // coupling between MC and TM anywhere we can help it.
536 ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_t2_condbranch, Fixups);
537 return getARMBranchTargetOpValue(MI, OpIdx, Fixups);
540 /// getBranchTargetOpValue - Return encoding info for 24-bit immediate branch
542 uint32_t ARMMCCodeEmitter::
543 getARMBranchTargetOpValue(const MCInst &MI, unsigned OpIdx,
544 SmallVectorImpl<MCFixup> &Fixups) const {
545 if (HasConditionalBranch(MI))
546 return ::getBranchTargetOpValue(MI, OpIdx,
547 ARM::fixup_arm_condbranch, Fixups);
548 return ::getBranchTargetOpValue(MI, OpIdx,
549 ARM::fixup_arm_uncondbranch, Fixups);
555 /// getUnconditionalBranchTargetOpValue - Return encoding info for 24-bit
556 /// immediate branch target.
557 uint32_t ARMMCCodeEmitter::
558 getUnconditionalBranchTargetOpValue(const MCInst &MI, unsigned OpIdx,
559 SmallVectorImpl<MCFixup> &Fixups) const {
561 ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_t2_uncondbranch, Fixups);
562 bool I = (Val & 0x800000);
563 bool J1 = (Val & 0x400000);
564 bool J2 = (Val & 0x200000);
578 /// getAdrLabelOpValue - Return encoding info for 12-bit immediate ADR label
580 uint32_t ARMMCCodeEmitter::
581 getAdrLabelOpValue(const MCInst &MI, unsigned OpIdx,
582 SmallVectorImpl<MCFixup> &Fixups) const {
583 assert(MI.getOperand(OpIdx).isExpr() && "Unexpected adr target type!");
584 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_adr_pcrel_12,
588 /// getAdrLabelOpValue - Return encoding info for 12-bit immediate ADR label
590 uint32_t ARMMCCodeEmitter::
591 getT2AdrLabelOpValue(const MCInst &MI, unsigned OpIdx,
592 SmallVectorImpl<MCFixup> &Fixups) const {
593 assert(MI.getOperand(OpIdx).isExpr() && "Unexpected adr target type!");
594 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_t2_adr_pcrel_12,
598 /// getAdrLabelOpValue - Return encoding info for 8-bit immediate ADR label
600 uint32_t ARMMCCodeEmitter::
601 getThumbAdrLabelOpValue(const MCInst &MI, unsigned OpIdx,
602 SmallVectorImpl<MCFixup> &Fixups) const {
603 assert(MI.getOperand(OpIdx).isExpr() && "Unexpected adr target type!");
604 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_thumb_adr_pcrel_10,
608 /// getThumbAddrModeRegRegOpValue - Return encoding info for 'reg + reg'
610 uint32_t ARMMCCodeEmitter::
611 getThumbAddrModeRegRegOpValue(const MCInst &MI, unsigned OpIdx,
612 SmallVectorImpl<MCFixup> &) const {
616 const MCOperand &MO1 = MI.getOperand(OpIdx);
617 const MCOperand &MO2 = MI.getOperand(OpIdx + 1);
618 unsigned Rn = getARMRegisterNumbering(MO1.getReg());
619 unsigned Rm = getARMRegisterNumbering(MO2.getReg());
620 return (Rm << 3) | Rn;
623 /// getAddrModeImm12OpValue - Return encoding info for 'reg +/- imm12' operand.
624 uint32_t ARMMCCodeEmitter::
625 getAddrModeImm12OpValue(const MCInst &MI, unsigned OpIdx,
626 SmallVectorImpl<MCFixup> &Fixups) const {
628 // {12} = (U)nsigned (add == '1', sub == '0')
632 // If The first operand isn't a register, we have a label reference.
633 const MCOperand &MO = MI.getOperand(OpIdx);
635 Reg = getARMRegisterNumbering(ARM::PC); // Rn is PC.
637 isAdd = false ; // 'U' bit is set as part of the fixup.
639 assert(MO.isExpr() && "Unexpected machine operand type!");
640 const MCExpr *Expr = MO.getExpr();
644 Kind = MCFixupKind(ARM::fixup_t2_ldst_pcrel_12);
646 Kind = MCFixupKind(ARM::fixup_arm_ldst_pcrel_12);
647 Fixups.push_back(MCFixup::Create(0, Expr, Kind));
649 ++MCNumCPRelocations;
651 isAdd = EncodeAddrModeOpValues(MI, OpIdx, Reg, Imm12, Fixups);
653 uint32_t Binary = Imm12 & 0xfff;
654 // Immediate is always encoded as positive. The 'U' bit controls add vs sub.
657 Binary |= (Reg << 13);
661 /// getT2AddrModeImm8s4OpValue - Return encoding info for
662 /// 'reg +/- imm8<<2' operand.
663 uint32_t ARMMCCodeEmitter::
664 getT2AddrModeImm8s4OpValue(const MCInst &MI, unsigned OpIdx,
665 SmallVectorImpl<MCFixup> &Fixups) const {
667 // {8} = (U)nsigned (add == '1', sub == '0')
671 // If The first operand isn't a register, we have a label reference.
672 const MCOperand &MO = MI.getOperand(OpIdx);
674 Reg = getARMRegisterNumbering(ARM::PC); // Rn is PC.
676 isAdd = false ; // 'U' bit is set as part of the fixup.
678 assert(MO.isExpr() && "Unexpected machine operand type!");
679 const MCExpr *Expr = MO.getExpr();
680 MCFixupKind Kind = MCFixupKind(ARM::fixup_arm_pcrel_10);
681 Fixups.push_back(MCFixup::Create(0, Expr, Kind));
683 ++MCNumCPRelocations;
685 isAdd = EncodeAddrModeOpValues(MI, OpIdx, Reg, Imm8, Fixups);
687 uint32_t Binary = (Imm8 >> 2) & 0xff;
688 // Immediate is always encoded as positive. The 'U' bit controls add vs sub.
691 Binary |= (Reg << 9);
695 // FIXME: This routine assumes that a binary
696 // expression will always result in a PCRel expression
697 // In reality, its only true if one or more subexpressions
698 // is itself a PCRel (i.e. "." in asm or some other pcrel construct)
699 // but this is good enough for now.
700 static bool EvaluateAsPCRel(const MCExpr *Expr) {
701 switch (Expr->getKind()) {
702 default: assert(0 && "Unexpected expression type");
703 case MCExpr::SymbolRef: return false;
704 case MCExpr::Binary: return true;
709 ARMMCCodeEmitter::getHiLo16ImmOpValue(const MCInst &MI, unsigned OpIdx,
710 SmallVectorImpl<MCFixup> &Fixups) const {
711 // {20-16} = imm{15-12}
712 // {11-0} = imm{11-0}
713 const MCOperand &MO = MI.getOperand(OpIdx);
715 // Hi / lo 16 bits already extracted during earlier passes.
716 return static_cast<unsigned>(MO.getImm());
718 // Handle :upper16: and :lower16: assembly prefixes.
719 const MCExpr *E = MO.getExpr();
720 if (E->getKind() == MCExpr::Target) {
721 const ARMMCExpr *ARM16Expr = cast<ARMMCExpr>(E);
722 E = ARM16Expr->getSubExpr();
725 switch (ARM16Expr->getKind()) {
726 default: assert(0 && "Unsupported ARMFixup");
727 case ARMMCExpr::VK_ARM_HI16:
728 if (!isTargetDarwin() && EvaluateAsPCRel(E))
729 Kind = MCFixupKind(isThumb2()
730 ? ARM::fixup_t2_movt_hi16_pcrel
731 : ARM::fixup_arm_movt_hi16_pcrel);
733 Kind = MCFixupKind(isThumb2()
734 ? ARM::fixup_t2_movt_hi16
735 : ARM::fixup_arm_movt_hi16);
737 case ARMMCExpr::VK_ARM_LO16:
738 if (!isTargetDarwin() && EvaluateAsPCRel(E))
739 Kind = MCFixupKind(isThumb2()
740 ? ARM::fixup_t2_movw_lo16_pcrel
741 : ARM::fixup_arm_movw_lo16_pcrel);
743 Kind = MCFixupKind(isThumb2()
744 ? ARM::fixup_t2_movw_lo16
745 : ARM::fixup_arm_movw_lo16);
748 Fixups.push_back(MCFixup::Create(0, E, Kind));
752 llvm_unreachable("Unsupported MCExpr type in MCOperand!");
756 uint32_t ARMMCCodeEmitter::
757 getLdStSORegOpValue(const MCInst &MI, unsigned OpIdx,
758 SmallVectorImpl<MCFixup> &Fixups) const {
759 const MCOperand &MO = MI.getOperand(OpIdx);
760 const MCOperand &MO1 = MI.getOperand(OpIdx+1);
761 const MCOperand &MO2 = MI.getOperand(OpIdx+2);
762 unsigned Rn = getARMRegisterNumbering(MO.getReg());
763 unsigned Rm = getARMRegisterNumbering(MO1.getReg());
764 unsigned ShImm = ARM_AM::getAM2Offset(MO2.getImm());
765 bool isAdd = ARM_AM::getAM2Op(MO2.getImm()) == ARM_AM::add;
766 ARM_AM::ShiftOpc ShOp = ARM_AM::getAM2ShiftOpc(MO2.getImm());
767 unsigned SBits = getShiftOp(ShOp);
776 uint32_t Binary = Rm;
778 Binary |= SBits << 5;
779 Binary |= ShImm << 7;
785 uint32_t ARMMCCodeEmitter::
786 getAddrMode2OpValue(const MCInst &MI, unsigned OpIdx,
787 SmallVectorImpl<MCFixup> &Fixups) const {
789 // {13} 1 == imm12, 0 == Rm
792 const MCOperand &MO = MI.getOperand(OpIdx);
793 unsigned Rn = getARMRegisterNumbering(MO.getReg());
794 uint32_t Binary = getAddrMode2OffsetOpValue(MI, OpIdx + 1, Fixups);
799 uint32_t ARMMCCodeEmitter::
800 getAddrMode2OffsetOpValue(const MCInst &MI, unsigned OpIdx,
801 SmallVectorImpl<MCFixup> &Fixups) const {
802 // {13} 1 == imm12, 0 == Rm
805 const MCOperand &MO = MI.getOperand(OpIdx);
806 const MCOperand &MO1 = MI.getOperand(OpIdx+1);
807 unsigned Imm = MO1.getImm();
808 bool isAdd = ARM_AM::getAM2Op(Imm) == ARM_AM::add;
809 bool isReg = MO.getReg() != 0;
810 uint32_t Binary = ARM_AM::getAM2Offset(Imm);
811 // if reg +/- reg, Rm will be non-zero. Otherwise, we have reg +/- imm12
813 ARM_AM::ShiftOpc ShOp = ARM_AM::getAM2ShiftOpc(Imm);
814 Binary <<= 7; // Shift amount is bits [11:7]
815 Binary |= getShiftOp(ShOp) << 5; // Shift type is bits [6:5]
816 Binary |= getARMRegisterNumbering(MO.getReg()); // Rm is bits [3:0]
818 return Binary | (isAdd << 12) | (isReg << 13);
821 uint32_t ARMMCCodeEmitter::
822 getPostIdxRegOpValue(const MCInst &MI, unsigned OpIdx,
823 SmallVectorImpl<MCFixup> &Fixups) const {
826 const MCOperand &MO = MI.getOperand(OpIdx);
827 const MCOperand &MO1 = MI.getOperand(OpIdx+1);
828 bool isAdd = MO1.getImm() != 0;
829 return getARMRegisterNumbering(MO.getReg()) | (isAdd << 4);
832 uint32_t ARMMCCodeEmitter::
833 getAddrMode3OffsetOpValue(const MCInst &MI, unsigned OpIdx,
834 SmallVectorImpl<MCFixup> &Fixups) const {
835 // {9} 1 == imm8, 0 == Rm
839 const MCOperand &MO = MI.getOperand(OpIdx);
840 const MCOperand &MO1 = MI.getOperand(OpIdx+1);
841 unsigned Imm = MO1.getImm();
842 bool isAdd = ARM_AM::getAM3Op(Imm) == ARM_AM::add;
843 bool isImm = MO.getReg() == 0;
844 uint32_t Imm8 = ARM_AM::getAM3Offset(Imm);
845 // if reg +/- reg, Rm will be non-zero. Otherwise, we have reg +/- imm8
847 Imm8 = getARMRegisterNumbering(MO.getReg());
848 return Imm8 | (isAdd << 8) | (isImm << 9);
851 uint32_t ARMMCCodeEmitter::
852 getAddrMode3OpValue(const MCInst &MI, unsigned OpIdx,
853 SmallVectorImpl<MCFixup> &Fixups) const {
854 // {13} 1 == imm8, 0 == Rm
859 const MCOperand &MO = MI.getOperand(OpIdx);
860 const MCOperand &MO1 = MI.getOperand(OpIdx+1);
861 const MCOperand &MO2 = MI.getOperand(OpIdx+2);
862 unsigned Rn = getARMRegisterNumbering(MO.getReg());
863 unsigned Imm = MO2.getImm();
864 bool isAdd = ARM_AM::getAM3Op(Imm) == ARM_AM::add;
865 bool isImm = MO1.getReg() == 0;
866 uint32_t Imm8 = ARM_AM::getAM3Offset(Imm);
867 // if reg +/- reg, Rm will be non-zero. Otherwise, we have reg +/- imm8
869 Imm8 = getARMRegisterNumbering(MO1.getReg());
870 return (Rn << 9) | Imm8 | (isAdd << 8) | (isImm << 13);
873 /// getAddrModeThumbSPOpValue - Encode the t_addrmode_sp operands.
874 uint32_t ARMMCCodeEmitter::
875 getAddrModeThumbSPOpValue(const MCInst &MI, unsigned OpIdx,
876 SmallVectorImpl<MCFixup> &Fixups) const {
879 const MCOperand &MO1 = MI.getOperand(OpIdx + 1);
880 assert(MI.getOperand(OpIdx).getReg() == ARM::SP &&
881 "Unexpected base register!");
883 // The immediate is already shifted for the implicit zeroes, so no change
885 return MO1.getImm() & 0xff;
888 /// getAddrModeISOpValue - Encode the t_addrmode_is# operands.
889 uint32_t ARMMCCodeEmitter::
890 getAddrModeISOpValue(const MCInst &MI, unsigned OpIdx,
891 SmallVectorImpl<MCFixup> &Fixups) const {
895 const MCOperand &MO = MI.getOperand(OpIdx);
896 const MCOperand &MO1 = MI.getOperand(OpIdx + 1);
897 unsigned Rn = getARMRegisterNumbering(MO.getReg());
898 unsigned Imm5 = MO1.getImm();
899 return ((Imm5 & 0x1f) << 3) | Rn;
902 /// getAddrModePCOpValue - Return encoding for t_addrmode_pc operands.
903 uint32_t ARMMCCodeEmitter::
904 getAddrModePCOpValue(const MCInst &MI, unsigned OpIdx,
905 SmallVectorImpl<MCFixup> &Fixups) const {
906 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_cp, Fixups);
909 /// getAddrMode5OpValue - Return encoding info for 'reg +/- imm10' operand.
910 uint32_t ARMMCCodeEmitter::
911 getAddrMode5OpValue(const MCInst &MI, unsigned OpIdx,
912 SmallVectorImpl<MCFixup> &Fixups) const {
914 // {8} = (U)nsigned (add == '1', sub == '0')
918 // If The first operand isn't a register, we have a label reference.
919 const MCOperand &MO = MI.getOperand(OpIdx);
921 Reg = getARMRegisterNumbering(ARM::PC); // Rn is PC.
923 isAdd = false; // 'U' bit is handled as part of the fixup.
925 assert(MO.isExpr() && "Unexpected machine operand type!");
926 const MCExpr *Expr = MO.getExpr();
929 Kind = MCFixupKind(ARM::fixup_t2_pcrel_10);
931 Kind = MCFixupKind(ARM::fixup_arm_pcrel_10);
932 Fixups.push_back(MCFixup::Create(0, Expr, Kind));
934 ++MCNumCPRelocations;
936 EncodeAddrModeOpValues(MI, OpIdx, Reg, Imm8, Fixups);
937 isAdd = ARM_AM::getAM5Op(Imm8) == ARM_AM::add;
940 uint32_t Binary = ARM_AM::getAM5Offset(Imm8);
941 // Immediate is always encoded as positive. The 'U' bit controls add vs sub.
944 Binary |= (Reg << 9);
948 unsigned ARMMCCodeEmitter::
949 getSORegRegOpValue(const MCInst &MI, unsigned OpIdx,
950 SmallVectorImpl<MCFixup> &Fixups) const {
951 // Sub-operands are [reg, reg, imm]. The first register is Rm, the reg to be
952 // shifted. The second is Rs, the amount to shift by, and the third specifies
953 // the type of the shift.
961 const MCOperand &MO = MI.getOperand(OpIdx);
962 const MCOperand &MO1 = MI.getOperand(OpIdx + 1);
963 const MCOperand &MO2 = MI.getOperand(OpIdx + 2);
964 ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO2.getImm());
967 unsigned Binary = getARMRegisterNumbering(MO.getReg());
969 // Encode the shift opcode.
971 unsigned Rs = MO1.getReg();
973 // Set shift operand (bit[7:4]).
979 default: llvm_unreachable("Unknown shift opc!");
980 case ARM_AM::lsl: SBits = 0x1; break;
981 case ARM_AM::lsr: SBits = 0x3; break;
982 case ARM_AM::asr: SBits = 0x5; break;
983 case ARM_AM::ror: SBits = 0x7; break;
987 Binary |= SBits << 4;
989 // Encode the shift operation Rs.
990 // Encode Rs bit[11:8].
991 assert(ARM_AM::getSORegOffset(MO2.getImm()) == 0);
992 return Binary | (getARMRegisterNumbering(Rs) << ARMII::RegRsShift);
995 unsigned ARMMCCodeEmitter::
996 getSORegImmOpValue(const MCInst &MI, unsigned OpIdx,
997 SmallVectorImpl<MCFixup> &Fixups) const {
998 // Sub-operands are [reg, imm]. The first register is Rm, the reg to be
999 // shifted. The second is the amount to shift by.
1006 const MCOperand &MO = MI.getOperand(OpIdx);
1007 const MCOperand &MO1 = MI.getOperand(OpIdx + 1);
1008 ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO1.getImm());
1011 unsigned Binary = getARMRegisterNumbering(MO.getReg());
1013 // Encode the shift opcode.
1016 // Set shift operand (bit[6:4]).
1021 // RRX - 110 and bit[11:8] clear.
1023 default: llvm_unreachable("Unknown shift opc!");
1024 case ARM_AM::lsl: SBits = 0x0; break;
1025 case ARM_AM::lsr: SBits = 0x2; break;
1026 case ARM_AM::asr: SBits = 0x4; break;
1027 case ARM_AM::ror: SBits = 0x6; break;
1033 // Encode shift_imm bit[11:7].
1034 Binary |= SBits << 4;
1035 return Binary | ARM_AM::getSORegOffset(MO1.getImm()) << 7;
1039 unsigned ARMMCCodeEmitter::
1040 getT2AddrModeSORegOpValue(const MCInst &MI, unsigned OpNum,
1041 SmallVectorImpl<MCFixup> &Fixups) const {
1042 const MCOperand &MO1 = MI.getOperand(OpNum);
1043 const MCOperand &MO2 = MI.getOperand(OpNum+1);
1044 const MCOperand &MO3 = MI.getOperand(OpNum+2);
1046 // Encoded as [Rn, Rm, imm].
1047 // FIXME: Needs fixup support.
1048 unsigned Value = getARMRegisterNumbering(MO1.getReg());
1050 Value |= getARMRegisterNumbering(MO2.getReg());
1052 Value |= MO3.getImm();
1057 unsigned ARMMCCodeEmitter::
1058 getT2AddrModeImm8OpValue(const MCInst &MI, unsigned OpNum,
1059 SmallVectorImpl<MCFixup> &Fixups) const {
1060 const MCOperand &MO1 = MI.getOperand(OpNum);
1061 const MCOperand &MO2 = MI.getOperand(OpNum+1);
1063 // FIXME: Needs fixup support.
1064 unsigned Value = getARMRegisterNumbering(MO1.getReg());
1066 // Even though the immediate is 8 bits long, we need 9 bits in order
1067 // to represent the (inverse of the) sign bit.
1069 int32_t tmp = (int32_t)MO2.getImm();
1073 Value |= 256; // Set the ADD bit
1078 unsigned ARMMCCodeEmitter::
1079 getT2AddrModeImm8OffsetOpValue(const MCInst &MI, unsigned OpNum,
1080 SmallVectorImpl<MCFixup> &Fixups) const {
1081 const MCOperand &MO1 = MI.getOperand(OpNum);
1083 // FIXME: Needs fixup support.
1085 int32_t tmp = (int32_t)MO1.getImm();
1089 Value |= 256; // Set the ADD bit
1094 unsigned ARMMCCodeEmitter::
1095 getT2AddrModeImm12OffsetOpValue(const MCInst &MI, unsigned OpNum,
1096 SmallVectorImpl<MCFixup> &Fixups) const {
1097 const MCOperand &MO1 = MI.getOperand(OpNum);
1099 // FIXME: Needs fixup support.
1101 int32_t tmp = (int32_t)MO1.getImm();
1105 Value |= 4096; // Set the ADD bit
1106 Value |= tmp & 4095;
1110 unsigned ARMMCCodeEmitter::
1111 getT2SORegOpValue(const MCInst &MI, unsigned OpIdx,
1112 SmallVectorImpl<MCFixup> &Fixups) const {
1113 // Sub-operands are [reg, imm]. The first register is Rm, the reg to be
1114 // shifted. The second is the amount to shift by.
1121 const MCOperand &MO = MI.getOperand(OpIdx);
1122 const MCOperand &MO1 = MI.getOperand(OpIdx + 1);
1123 ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO1.getImm());
1126 unsigned Binary = getARMRegisterNumbering(MO.getReg());
1128 // Encode the shift opcode.
1130 // Set shift operand (bit[6:4]).
1136 default: llvm_unreachable("Unknown shift opc!");
1137 case ARM_AM::lsl: SBits = 0x0; break;
1138 case ARM_AM::lsr: SBits = 0x2; break;
1139 case ARM_AM::asr: SBits = 0x4; break;
1140 case ARM_AM::ror: SBits = 0x6; break;
1143 Binary |= SBits << 4;
1144 if (SOpc == ARM_AM::rrx)
1147 // Encode shift_imm bit[11:7].
1148 return Binary | ARM_AM::getSORegOffset(MO1.getImm()) << 7;
1151 unsigned ARMMCCodeEmitter::
1152 getBitfieldInvertedMaskOpValue(const MCInst &MI, unsigned Op,
1153 SmallVectorImpl<MCFixup> &Fixups) const {
1154 // 10 bits. lower 5 bits are are the lsb of the mask, high five bits are the
1156 const MCOperand &MO = MI.getOperand(Op);
1157 uint32_t v = ~MO.getImm();
1158 uint32_t lsb = CountTrailingZeros_32(v);
1159 uint32_t msb = (32 - CountLeadingZeros_32 (v)) - 1;
1160 assert (v != 0 && lsb < 32 && msb < 32 && "Illegal bitfield mask!");
1161 return lsb | (msb << 5);
1164 unsigned ARMMCCodeEmitter::
1165 getMsbOpValue(const MCInst &MI, unsigned Op,
1166 SmallVectorImpl<MCFixup> &Fixups) const {
1168 uint32_t lsb = MI.getOperand(Op-1).getImm();
1169 uint32_t width = MI.getOperand(Op).getImm();
1170 uint32_t msb = lsb+width-1;
1171 assert (width != 0 && msb < 32 && "Illegal bit width!");
1175 unsigned ARMMCCodeEmitter::
1176 getRegisterListOpValue(const MCInst &MI, unsigned Op,
1177 SmallVectorImpl<MCFixup> &Fixups) const {
1180 // {7-0} = Number of registers
1183 // {15-0} = Bitfield of GPRs.
1184 unsigned Reg = MI.getOperand(Op).getReg();
1185 bool SPRRegs = llvm::ARMMCRegisterClasses[ARM::SPRRegClassID].contains(Reg);
1186 bool DPRRegs = llvm::ARMMCRegisterClasses[ARM::DPRRegClassID].contains(Reg);
1188 unsigned Binary = 0;
1190 if (SPRRegs || DPRRegs) {
1192 unsigned RegNo = getARMRegisterNumbering(Reg);
1193 unsigned NumRegs = (MI.getNumOperands() - Op) & 0xff;
1194 Binary |= (RegNo & 0x1f) << 8;
1198 Binary |= NumRegs * 2;
1200 for (unsigned I = Op, E = MI.getNumOperands(); I < E; ++I) {
1201 unsigned RegNo = getARMRegisterNumbering(MI.getOperand(I).getReg());
1202 Binary |= 1 << RegNo;
1209 /// getAddrMode6AddressOpValue - Encode an addrmode6 register number along
1210 /// with the alignment operand.
1211 unsigned ARMMCCodeEmitter::
1212 getAddrMode6AddressOpValue(const MCInst &MI, unsigned Op,
1213 SmallVectorImpl<MCFixup> &Fixups) const {
1214 const MCOperand &Reg = MI.getOperand(Op);
1215 const MCOperand &Imm = MI.getOperand(Op + 1);
1217 unsigned RegNo = getARMRegisterNumbering(Reg.getReg());
1220 switch (Imm.getImm()) {
1224 case 8: Align = 0x01; break;
1225 case 16: Align = 0x02; break;
1226 case 32: Align = 0x03; break;
1229 return RegNo | (Align << 4);
1232 /// getAddrMode6OneLane32AddressOpValue - Encode an addrmode6 register number
1233 /// along with the alignment operand for use in VST1 and VLD1 with size 32.
1234 unsigned ARMMCCodeEmitter::
1235 getAddrMode6OneLane32AddressOpValue(const MCInst &MI, unsigned Op,
1236 SmallVectorImpl<MCFixup> &Fixups) const {
1237 const MCOperand &Reg = MI.getOperand(Op);
1238 const MCOperand &Imm = MI.getOperand(Op + 1);
1240 unsigned RegNo = getARMRegisterNumbering(Reg.getReg());
1243 switch (Imm.getImm()) {
1248 case 16: Align = 0x00; break;
1249 case 32: Align = 0x03; break;
1252 return RegNo | (Align << 4);
1256 /// getAddrMode6DupAddressOpValue - Encode an addrmode6 register number and
1257 /// alignment operand for use in VLD-dup instructions. This is the same as
1258 /// getAddrMode6AddressOpValue except for the alignment encoding, which is
1259 /// different for VLD4-dup.
1260 unsigned ARMMCCodeEmitter::
1261 getAddrMode6DupAddressOpValue(const MCInst &MI, unsigned Op,
1262 SmallVectorImpl<MCFixup> &Fixups) const {
1263 const MCOperand &Reg = MI.getOperand(Op);
1264 const MCOperand &Imm = MI.getOperand(Op + 1);
1266 unsigned RegNo = getARMRegisterNumbering(Reg.getReg());
1269 switch (Imm.getImm()) {
1273 case 8: Align = 0x01; break;
1274 case 16: Align = 0x03; break;
1277 return RegNo | (Align << 4);
1280 unsigned ARMMCCodeEmitter::
1281 getAddrMode6OffsetOpValue(const MCInst &MI, unsigned Op,
1282 SmallVectorImpl<MCFixup> &Fixups) const {
1283 const MCOperand &MO = MI.getOperand(Op);
1284 if (MO.getReg() == 0) return 0x0D;
1288 unsigned ARMMCCodeEmitter::
1289 getShiftRight8Imm(const MCInst &MI, unsigned Op,
1290 SmallVectorImpl<MCFixup> &Fixups) const {
1291 return 8 - MI.getOperand(Op).getImm();
1294 unsigned ARMMCCodeEmitter::
1295 getShiftRight16Imm(const MCInst &MI, unsigned Op,
1296 SmallVectorImpl<MCFixup> &Fixups) const {
1297 return 16 - MI.getOperand(Op).getImm();
1300 unsigned ARMMCCodeEmitter::
1301 getShiftRight32Imm(const MCInst &MI, unsigned Op,
1302 SmallVectorImpl<MCFixup> &Fixups) const {
1303 return 32 - MI.getOperand(Op).getImm();
1306 unsigned ARMMCCodeEmitter::
1307 getShiftRight64Imm(const MCInst &MI, unsigned Op,
1308 SmallVectorImpl<MCFixup> &Fixups) const {
1309 return 64 - MI.getOperand(Op).getImm();
1312 void ARMMCCodeEmitter::
1313 EncodeInstruction(const MCInst &MI, raw_ostream &OS,
1314 SmallVectorImpl<MCFixup> &Fixups) const {
1315 // Pseudo instructions don't get encoded.
1316 const MCInstrDesc &Desc = MCII.get(MI.getOpcode());
1317 uint64_t TSFlags = Desc.TSFlags;
1318 if ((TSFlags & ARMII::FormMask) == ARMII::Pseudo)
1322 if (Desc.getSize() == 2 || Desc.getSize() == 4)
1323 Size = Desc.getSize();
1325 llvm_unreachable("Unexpected instruction size!");
1327 uint32_t Binary = getBinaryCodeForInstr(MI, Fixups);
1328 // Thumb 32-bit wide instructions need to emit the high order halfword
1330 if (isThumb() && Size == 4) {
1331 EmitConstant(Binary >> 16, 2, OS);
1332 EmitConstant(Binary & 0xffff, 2, OS);
1334 EmitConstant(Binary, Size, OS);
1335 ++MCNumEmitted; // Keep track of the # of mi's emitted.
1338 #include "ARMGenMCCodeEmitter.inc"