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;
121 uint32_t getARMBLXTargetOpValue(const MCInst &MI, unsigned OpIdx,
122 SmallVectorImpl<MCFixup> &Fixups) const;
124 /// getAdrLabelOpValue - Return encoding info for 12-bit immediate
125 /// ADR label target.
126 uint32_t getAdrLabelOpValue(const MCInst &MI, unsigned OpIdx,
127 SmallVectorImpl<MCFixup> &Fixups) const;
128 uint32_t getThumbAdrLabelOpValue(const MCInst &MI, unsigned OpIdx,
129 SmallVectorImpl<MCFixup> &Fixups) const;
130 uint32_t getT2AdrLabelOpValue(const MCInst &MI, unsigned OpIdx,
131 SmallVectorImpl<MCFixup> &Fixups) const;
134 /// getAddrModeImm12OpValue - Return encoding info for 'reg +/- imm12'
136 uint32_t getAddrModeImm12OpValue(const MCInst &MI, unsigned OpIdx,
137 SmallVectorImpl<MCFixup> &Fixups) const;
139 /// getThumbAddrModeRegRegOpValue - Return encoding for 'reg + reg' operand.
140 uint32_t getThumbAddrModeRegRegOpValue(const MCInst &MI, unsigned OpIdx,
141 SmallVectorImpl<MCFixup> &Fixups)const;
143 /// getT2AddrModeImm8s4OpValue - Return encoding info for 'reg +/- imm8<<2'
145 uint32_t getT2AddrModeImm8s4OpValue(const MCInst &MI, unsigned OpIdx,
146 SmallVectorImpl<MCFixup> &Fixups) const;
149 /// getLdStSORegOpValue - Return encoding info for 'reg +/- reg shop imm'
150 /// operand as needed by load/store instructions.
151 uint32_t getLdStSORegOpValue(const MCInst &MI, unsigned OpIdx,
152 SmallVectorImpl<MCFixup> &Fixups) const;
154 /// getLdStmModeOpValue - Return encoding for load/store multiple mode.
155 uint32_t getLdStmModeOpValue(const MCInst &MI, unsigned OpIdx,
156 SmallVectorImpl<MCFixup> &Fixups) const {
157 ARM_AM::AMSubMode Mode = (ARM_AM::AMSubMode)MI.getOperand(OpIdx).getImm();
159 default: assert(0 && "Unknown addressing sub-mode!");
160 case ARM_AM::da: return 0;
161 case ARM_AM::ia: return 1;
162 case ARM_AM::db: return 2;
163 case ARM_AM::ib: return 3;
166 /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value.
168 unsigned getShiftOp(ARM_AM::ShiftOpc ShOpc) const {
170 default: llvm_unreachable("Unknown shift opc!");
171 case ARM_AM::no_shift:
172 case ARM_AM::lsl: return 0;
173 case ARM_AM::lsr: return 1;
174 case ARM_AM::asr: return 2;
176 case ARM_AM::rrx: return 3;
181 /// getAddrMode2OpValue - Return encoding for addrmode2 operands.
182 uint32_t getAddrMode2OpValue(const MCInst &MI, unsigned OpIdx,
183 SmallVectorImpl<MCFixup> &Fixups) const;
185 /// getAddrMode2OffsetOpValue - Return encoding for am2offset operands.
186 uint32_t getAddrMode2OffsetOpValue(const MCInst &MI, unsigned OpIdx,
187 SmallVectorImpl<MCFixup> &Fixups) const;
189 /// getPostIdxRegOpValue - Return encoding for postidx_reg operands.
190 uint32_t getPostIdxRegOpValue(const MCInst &MI, unsigned OpIdx,
191 SmallVectorImpl<MCFixup> &Fixups) const;
193 /// getAddrMode3OffsetOpValue - Return encoding for am3offset operands.
194 uint32_t getAddrMode3OffsetOpValue(const MCInst &MI, unsigned OpIdx,
195 SmallVectorImpl<MCFixup> &Fixups) const;
197 /// getAddrMode3OpValue - Return encoding for addrmode3 operands.
198 uint32_t getAddrMode3OpValue(const MCInst &MI, unsigned OpIdx,
199 SmallVectorImpl<MCFixup> &Fixups) const;
201 /// getAddrModeThumbSPOpValue - Return encoding info for 'reg +/- imm12'
203 uint32_t getAddrModeThumbSPOpValue(const MCInst &MI, unsigned OpIdx,
204 SmallVectorImpl<MCFixup> &Fixups) const;
206 /// getAddrModeISOpValue - Encode the t_addrmode_is# operands.
207 uint32_t getAddrModeISOpValue(const MCInst &MI, unsigned OpIdx,
208 SmallVectorImpl<MCFixup> &Fixups) const;
210 /// getAddrModePCOpValue - Return encoding for t_addrmode_pc operands.
211 uint32_t getAddrModePCOpValue(const MCInst &MI, unsigned OpIdx,
212 SmallVectorImpl<MCFixup> &Fixups) const;
214 /// getAddrMode5OpValue - Return encoding info for 'reg +/- imm8' operand.
215 uint32_t getAddrMode5OpValue(const MCInst &MI, unsigned OpIdx,
216 SmallVectorImpl<MCFixup> &Fixups) const;
218 /// getCCOutOpValue - Return encoding of the 's' bit.
219 unsigned getCCOutOpValue(const MCInst &MI, unsigned Op,
220 SmallVectorImpl<MCFixup> &Fixups) const {
221 // The operand is either reg0 or CPSR. The 's' bit is encoded as '0' or
223 return MI.getOperand(Op).getReg() == ARM::CPSR;
226 /// getSOImmOpValue - Return an encoded 12-bit shifted-immediate value.
227 unsigned getSOImmOpValue(const MCInst &MI, unsigned Op,
228 SmallVectorImpl<MCFixup> &Fixups) const {
229 unsigned SoImm = MI.getOperand(Op).getImm();
230 int SoImmVal = ARM_AM::getSOImmVal(SoImm);
231 assert(SoImmVal != -1 && "Not a valid so_imm value!");
233 // Encode rotate_imm.
234 unsigned Binary = (ARM_AM::getSOImmValRot((unsigned)SoImmVal) >> 1)
235 << ARMII::SoRotImmShift;
238 Binary |= ARM_AM::getSOImmValImm((unsigned)SoImmVal);
242 /// getT2SOImmOpValue - Return an encoded 12-bit shifted-immediate value.
243 unsigned getT2SOImmOpValue(const MCInst &MI, unsigned Op,
244 SmallVectorImpl<MCFixup> &Fixups) const {
245 unsigned SoImm = MI.getOperand(Op).getImm();
246 unsigned Encoded = ARM_AM::getT2SOImmVal(SoImm);
247 assert(Encoded != ~0U && "Not a Thumb2 so_imm value?");
251 unsigned getT2AddrModeSORegOpValue(const MCInst &MI, unsigned OpNum,
252 SmallVectorImpl<MCFixup> &Fixups) const;
253 unsigned getT2AddrModeImm8OpValue(const MCInst &MI, unsigned OpNum,
254 SmallVectorImpl<MCFixup> &Fixups) const;
255 unsigned getT2AddrModeImm8OffsetOpValue(const MCInst &MI, unsigned OpNum,
256 SmallVectorImpl<MCFixup> &Fixups) const;
257 unsigned getT2AddrModeImm12OffsetOpValue(const MCInst &MI, unsigned OpNum,
258 SmallVectorImpl<MCFixup> &Fixups) const;
260 /// getSORegOpValue - Return an encoded so_reg shifted register value.
261 unsigned getSORegRegOpValue(const MCInst &MI, unsigned Op,
262 SmallVectorImpl<MCFixup> &Fixups) const;
263 unsigned getSORegImmOpValue(const MCInst &MI, unsigned Op,
264 SmallVectorImpl<MCFixup> &Fixups) const;
265 unsigned getT2SORegOpValue(const MCInst &MI, unsigned Op,
266 SmallVectorImpl<MCFixup> &Fixups) const;
268 unsigned getNEONVcvtImm32OpValue(const MCInst &MI, unsigned Op,
269 SmallVectorImpl<MCFixup> &Fixups) const {
270 return 64 - MI.getOperand(Op).getImm();
273 unsigned getBitfieldInvertedMaskOpValue(const MCInst &MI, unsigned Op,
274 SmallVectorImpl<MCFixup> &Fixups) const;
276 unsigned getMsbOpValue(const MCInst &MI, unsigned Op,
277 SmallVectorImpl<MCFixup> &Fixups) const;
279 unsigned getRegisterListOpValue(const MCInst &MI, unsigned Op,
280 SmallVectorImpl<MCFixup> &Fixups) const;
281 unsigned getAddrMode6AddressOpValue(const MCInst &MI, unsigned Op,
282 SmallVectorImpl<MCFixup> &Fixups) const;
283 unsigned getAddrMode6OneLane32AddressOpValue(const MCInst &MI, unsigned Op,
284 SmallVectorImpl<MCFixup> &Fixups) const;
285 unsigned getAddrMode6DupAddressOpValue(const MCInst &MI, unsigned Op,
286 SmallVectorImpl<MCFixup> &Fixups) const;
287 unsigned getAddrMode6OffsetOpValue(const MCInst &MI, unsigned Op,
288 SmallVectorImpl<MCFixup> &Fixups) const;
290 unsigned getShiftRight8Imm(const MCInst &MI, unsigned Op,
291 SmallVectorImpl<MCFixup> &Fixups) const;
292 unsigned getShiftRight16Imm(const MCInst &MI, unsigned Op,
293 SmallVectorImpl<MCFixup> &Fixups) const;
294 unsigned getShiftRight32Imm(const MCInst &MI, unsigned Op,
295 SmallVectorImpl<MCFixup> &Fixups) const;
296 unsigned getShiftRight64Imm(const MCInst &MI, unsigned Op,
297 SmallVectorImpl<MCFixup> &Fixups) const;
299 unsigned getThumbSRImmOpValue(const MCInst &MI, unsigned Op,
300 SmallVectorImpl<MCFixup> &Fixups) const;
302 unsigned NEONThumb2DataIPostEncoder(const MCInst &MI,
303 unsigned EncodedValue) const;
304 unsigned NEONThumb2LoadStorePostEncoder(const MCInst &MI,
305 unsigned EncodedValue) const;
306 unsigned NEONThumb2DupPostEncoder(const MCInst &MI,
307 unsigned EncodedValue) const;
309 unsigned VFPThumb2PostEncoder(const MCInst &MI,
310 unsigned EncodedValue) const;
312 void EmitByte(unsigned char C, raw_ostream &OS) const {
316 void EmitConstant(uint64_t Val, unsigned Size, raw_ostream &OS) const {
317 // Output the constant in little endian byte order.
318 for (unsigned i = 0; i != Size; ++i) {
319 EmitByte(Val & 255, OS);
324 void EncodeInstruction(const MCInst &MI, raw_ostream &OS,
325 SmallVectorImpl<MCFixup> &Fixups) const;
328 } // end anonymous namespace
330 MCCodeEmitter *llvm::createARMMCCodeEmitter(const MCInstrInfo &MCII,
331 const MCSubtargetInfo &STI,
333 return new ARMMCCodeEmitter(MCII, STI, Ctx);
336 /// NEONThumb2DataIPostEncoder - Post-process encoded NEON data-processing
337 /// instructions, and rewrite them to their Thumb2 form if we are currently in
339 unsigned ARMMCCodeEmitter::NEONThumb2DataIPostEncoder(const MCInst &MI,
340 unsigned EncodedValue) const {
342 // NEON Thumb2 data-processsing encodings are very simple: bit 24 is moved
343 // to bit 12 of the high half-word (i.e. bit 28), and bits 27-24 are
345 unsigned Bit24 = EncodedValue & 0x01000000;
346 unsigned Bit28 = Bit24 << 4;
347 EncodedValue &= 0xEFFFFFFF;
348 EncodedValue |= Bit28;
349 EncodedValue |= 0x0F000000;
355 /// NEONThumb2LoadStorePostEncoder - Post-process encoded NEON load/store
356 /// instructions, and rewrite them to their Thumb2 form if we are currently in
358 unsigned ARMMCCodeEmitter::NEONThumb2LoadStorePostEncoder(const MCInst &MI,
359 unsigned EncodedValue) const {
361 EncodedValue &= 0xF0FFFFFF;
362 EncodedValue |= 0x09000000;
368 /// NEONThumb2DupPostEncoder - Post-process encoded NEON vdup
369 /// instructions, and rewrite them to their Thumb2 form if we are currently in
371 unsigned ARMMCCodeEmitter::NEONThumb2DupPostEncoder(const MCInst &MI,
372 unsigned EncodedValue) const {
374 EncodedValue &= 0x00FFFFFF;
375 EncodedValue |= 0xEE000000;
381 /// VFPThumb2PostEncoder - Post-process encoded VFP instructions and rewrite
382 /// them to their Thumb2 form if we are currently in Thumb2 mode.
383 unsigned ARMMCCodeEmitter::
384 VFPThumb2PostEncoder(const MCInst &MI, unsigned EncodedValue) const {
386 EncodedValue &= 0x0FFFFFFF;
387 EncodedValue |= 0xE0000000;
392 /// getMachineOpValue - Return binary encoding of operand. If the machine
393 /// operand requires relocation, record the relocation and return zero.
394 unsigned ARMMCCodeEmitter::
395 getMachineOpValue(const MCInst &MI, const MCOperand &MO,
396 SmallVectorImpl<MCFixup> &Fixups) const {
398 unsigned Reg = MO.getReg();
399 unsigned RegNo = getARMRegisterNumbering(Reg);
401 // Q registers are encoded as 2x their register number.
405 case ARM::Q0: case ARM::Q1: case ARM::Q2: case ARM::Q3:
406 case ARM::Q4: case ARM::Q5: case ARM::Q6: case ARM::Q7:
407 case ARM::Q8: case ARM::Q9: case ARM::Q10: case ARM::Q11:
408 case ARM::Q12: case ARM::Q13: case ARM::Q14: case ARM::Q15:
411 } else if (MO.isImm()) {
412 return static_cast<unsigned>(MO.getImm());
413 } else if (MO.isFPImm()) {
414 return static_cast<unsigned>(APFloat(MO.getFPImm())
415 .bitcastToAPInt().getHiBits(32).getLimitedValue());
418 llvm_unreachable("Unable to encode MCOperand!");
422 /// getAddrModeImmOpValue - Return encoding info for 'reg +/- imm' operand.
423 bool ARMMCCodeEmitter::
424 EncodeAddrModeOpValues(const MCInst &MI, unsigned OpIdx, unsigned &Reg,
425 unsigned &Imm, SmallVectorImpl<MCFixup> &Fixups) const {
426 const MCOperand &MO = MI.getOperand(OpIdx);
427 const MCOperand &MO1 = MI.getOperand(OpIdx + 1);
429 Reg = getARMRegisterNumbering(MO.getReg());
431 int32_t SImm = MO1.getImm();
434 // Special value for #-0
435 if (SImm == INT32_MIN) {
440 // Immediate is always encoded as positive. The 'U' bit controls add vs sub.
450 /// getBranchTargetOpValue - Helper function to get the branch target operand,
451 /// which is either an immediate or requires a fixup.
452 static uint32_t getBranchTargetOpValue(const MCInst &MI, unsigned OpIdx,
454 SmallVectorImpl<MCFixup> &Fixups) {
455 const MCOperand &MO = MI.getOperand(OpIdx);
457 // If the destination is an immediate, we have nothing to do.
458 if (MO.isImm()) return MO.getImm();
459 assert(MO.isExpr() && "Unexpected branch target type!");
460 const MCExpr *Expr = MO.getExpr();
461 MCFixupKind Kind = MCFixupKind(FixupKind);
462 Fixups.push_back(MCFixup::Create(0, Expr, Kind));
464 // All of the information is in the fixup.
468 /// getThumbBLTargetOpValue - Return encoding info for immediate branch target.
469 uint32_t ARMMCCodeEmitter::
470 getThumbBLTargetOpValue(const MCInst &MI, unsigned OpIdx,
471 SmallVectorImpl<MCFixup> &Fixups) const {
472 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_bl, Fixups);
475 /// getThumbBLXTargetOpValue - Return encoding info for Thumb immediate
476 /// BLX branch target.
477 uint32_t ARMMCCodeEmitter::
478 getThumbBLXTargetOpValue(const MCInst &MI, unsigned OpIdx,
479 SmallVectorImpl<MCFixup> &Fixups) const {
480 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_blx, Fixups);
483 /// getThumbBRTargetOpValue - Return encoding info for Thumb branch target.
484 uint32_t ARMMCCodeEmitter::
485 getThumbBRTargetOpValue(const MCInst &MI, unsigned OpIdx,
486 SmallVectorImpl<MCFixup> &Fixups) const {
487 const MCOperand MO = MI.getOperand(OpIdx);
489 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_br, Fixups);
490 return (MO.getImm() >> 1);
493 /// getThumbBCCTargetOpValue - Return encoding info for Thumb branch target.
494 uint32_t ARMMCCodeEmitter::
495 getThumbBCCTargetOpValue(const MCInst &MI, unsigned OpIdx,
496 SmallVectorImpl<MCFixup> &Fixups) const {
497 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_bcc, Fixups);
500 /// getThumbCBTargetOpValue - Return encoding info for Thumb branch target.
501 uint32_t ARMMCCodeEmitter::
502 getThumbCBTargetOpValue(const MCInst &MI, unsigned OpIdx,
503 SmallVectorImpl<MCFixup> &Fixups) const {
504 const MCOperand MO = MI.getOperand(OpIdx);
506 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_cb, Fixups);
507 return (MO.getImm() >> 1);
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 const MCOperand MO = MI.getOperand(OpIdx);
547 if (HasConditionalBranch(MI))
548 return ::getBranchTargetOpValue(MI, OpIdx,
549 ARM::fixup_arm_condbranch, Fixups);
550 return ::getBranchTargetOpValue(MI, OpIdx,
551 ARM::fixup_arm_uncondbranch, Fixups);
554 return MO.getImm() >> 2;
557 uint32_t ARMMCCodeEmitter::
558 getARMBLXTargetOpValue(const MCInst &MI, unsigned OpIdx,
559 SmallVectorImpl<MCFixup> &Fixups) const {
560 const MCOperand MO = MI.getOperand(OpIdx);
562 if (HasConditionalBranch(MI))
563 return ::getBranchTargetOpValue(MI, OpIdx,
564 ARM::fixup_arm_condbranch, Fixups);
565 return ::getBranchTargetOpValue(MI, OpIdx,
566 ARM::fixup_arm_uncondbranch, Fixups);
569 return MO.getImm() >> 1;
572 /// getUnconditionalBranchTargetOpValue - Return encoding info for 24-bit
573 /// immediate branch target.
574 uint32_t ARMMCCodeEmitter::
575 getUnconditionalBranchTargetOpValue(const MCInst &MI, unsigned OpIdx,
576 SmallVectorImpl<MCFixup> &Fixups) const {
578 ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_t2_uncondbranch, Fixups);
579 bool I = (Val & 0x800000);
580 bool J1 = (Val & 0x400000);
581 bool J2 = (Val & 0x200000);
595 /// getAdrLabelOpValue - Return encoding info for 12-bit immediate ADR label
597 uint32_t ARMMCCodeEmitter::
598 getAdrLabelOpValue(const MCInst &MI, unsigned OpIdx,
599 SmallVectorImpl<MCFixup> &Fixups) const {
600 const MCOperand MO = MI.getOperand(OpIdx);
602 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_adr_pcrel_12,
604 int32_t offset = MO.getImm();
605 uint32_t Val = 0x2000;
614 /// getAdrLabelOpValue - Return encoding info for 12-bit immediate ADR label
616 uint32_t ARMMCCodeEmitter::
617 getT2AdrLabelOpValue(const MCInst &MI, unsigned OpIdx,
618 SmallVectorImpl<MCFixup> &Fixups) const {
619 const MCOperand MO = MI.getOperand(OpIdx);
621 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_t2_adr_pcrel_12,
626 /// getAdrLabelOpValue - Return encoding info for 8-bit immediate ADR label
628 uint32_t ARMMCCodeEmitter::
629 getThumbAdrLabelOpValue(const MCInst &MI, unsigned OpIdx,
630 SmallVectorImpl<MCFixup> &Fixups) const {
631 const MCOperand MO = MI.getOperand(OpIdx);
633 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_thumb_adr_pcrel_10,
638 /// getThumbAddrModeRegRegOpValue - Return encoding info for 'reg + reg'
640 uint32_t ARMMCCodeEmitter::
641 getThumbAddrModeRegRegOpValue(const MCInst &MI, unsigned OpIdx,
642 SmallVectorImpl<MCFixup> &) const {
646 const MCOperand &MO1 = MI.getOperand(OpIdx);
647 const MCOperand &MO2 = MI.getOperand(OpIdx + 1);
648 unsigned Rn = getARMRegisterNumbering(MO1.getReg());
649 unsigned Rm = getARMRegisterNumbering(MO2.getReg());
650 return (Rm << 3) | Rn;
653 /// getAddrModeImm12OpValue - Return encoding info for 'reg +/- imm12' operand.
654 uint32_t ARMMCCodeEmitter::
655 getAddrModeImm12OpValue(const MCInst &MI, unsigned OpIdx,
656 SmallVectorImpl<MCFixup> &Fixups) const {
658 // {12} = (U)nsigned (add == '1', sub == '0')
662 // If The first operand isn't a register, we have a label reference.
663 const MCOperand &MO = MI.getOperand(OpIdx);
665 Reg = getARMRegisterNumbering(ARM::PC); // Rn is PC.
667 isAdd = false ; // 'U' bit is set as part of the fixup.
669 assert(MO.isExpr() && "Unexpected machine operand type!");
670 const MCExpr *Expr = MO.getExpr();
674 Kind = MCFixupKind(ARM::fixup_t2_ldst_pcrel_12);
676 Kind = MCFixupKind(ARM::fixup_arm_ldst_pcrel_12);
677 Fixups.push_back(MCFixup::Create(0, Expr, Kind));
679 ++MCNumCPRelocations;
681 isAdd = EncodeAddrModeOpValues(MI, OpIdx, Reg, Imm12, Fixups);
683 uint32_t Binary = Imm12 & 0xfff;
684 // Immediate is always encoded as positive. The 'U' bit controls add vs sub.
687 Binary |= (Reg << 13);
691 /// getT2AddrModeImm8s4OpValue - Return encoding info for
692 /// 'reg +/- imm8<<2' operand.
693 uint32_t ARMMCCodeEmitter::
694 getT2AddrModeImm8s4OpValue(const MCInst &MI, unsigned OpIdx,
695 SmallVectorImpl<MCFixup> &Fixups) const {
697 // {8} = (U)nsigned (add == '1', sub == '0')
701 // If The first operand isn't a register, we have a label reference.
702 const MCOperand &MO = MI.getOperand(OpIdx);
704 Reg = getARMRegisterNumbering(ARM::PC); // Rn is PC.
706 isAdd = false ; // 'U' bit is set as part of the fixup.
708 assert(MO.isExpr() && "Unexpected machine operand type!");
709 const MCExpr *Expr = MO.getExpr();
710 MCFixupKind Kind = MCFixupKind(ARM::fixup_arm_pcrel_10);
711 Fixups.push_back(MCFixup::Create(0, Expr, Kind));
713 ++MCNumCPRelocations;
715 isAdd = EncodeAddrModeOpValues(MI, OpIdx, Reg, Imm8, Fixups);
717 uint32_t Binary = (Imm8 >> 2) & 0xff;
718 // Immediate is always encoded as positive. The 'U' bit controls add vs sub.
721 Binary |= (Reg << 9);
725 // FIXME: This routine assumes that a binary
726 // expression will always result in a PCRel expression
727 // In reality, its only true if one or more subexpressions
728 // is itself a PCRel (i.e. "." in asm or some other pcrel construct)
729 // but this is good enough for now.
730 static bool EvaluateAsPCRel(const MCExpr *Expr) {
731 switch (Expr->getKind()) {
732 default: assert(0 && "Unexpected expression type");
733 case MCExpr::SymbolRef: return false;
734 case MCExpr::Binary: return true;
739 ARMMCCodeEmitter::getHiLo16ImmOpValue(const MCInst &MI, unsigned OpIdx,
740 SmallVectorImpl<MCFixup> &Fixups) const {
741 // {20-16} = imm{15-12}
742 // {11-0} = imm{11-0}
743 const MCOperand &MO = MI.getOperand(OpIdx);
745 // Hi / lo 16 bits already extracted during earlier passes.
746 return static_cast<unsigned>(MO.getImm());
748 // Handle :upper16: and :lower16: assembly prefixes.
749 const MCExpr *E = MO.getExpr();
750 if (E->getKind() == MCExpr::Target) {
751 const ARMMCExpr *ARM16Expr = cast<ARMMCExpr>(E);
752 E = ARM16Expr->getSubExpr();
755 switch (ARM16Expr->getKind()) {
756 default: assert(0 && "Unsupported ARMFixup");
757 case ARMMCExpr::VK_ARM_HI16:
758 if (!isTargetDarwin() && EvaluateAsPCRel(E))
759 Kind = MCFixupKind(isThumb2()
760 ? ARM::fixup_t2_movt_hi16_pcrel
761 : ARM::fixup_arm_movt_hi16_pcrel);
763 Kind = MCFixupKind(isThumb2()
764 ? ARM::fixup_t2_movt_hi16
765 : ARM::fixup_arm_movt_hi16);
767 case ARMMCExpr::VK_ARM_LO16:
768 if (!isTargetDarwin() && EvaluateAsPCRel(E))
769 Kind = MCFixupKind(isThumb2()
770 ? ARM::fixup_t2_movw_lo16_pcrel
771 : ARM::fixup_arm_movw_lo16_pcrel);
773 Kind = MCFixupKind(isThumb2()
774 ? ARM::fixup_t2_movw_lo16
775 : ARM::fixup_arm_movw_lo16);
778 Fixups.push_back(MCFixup::Create(0, E, Kind));
782 llvm_unreachable("Unsupported MCExpr type in MCOperand!");
786 uint32_t ARMMCCodeEmitter::
787 getLdStSORegOpValue(const MCInst &MI, unsigned OpIdx,
788 SmallVectorImpl<MCFixup> &Fixups) const {
789 const MCOperand &MO = MI.getOperand(OpIdx);
790 const MCOperand &MO1 = MI.getOperand(OpIdx+1);
791 const MCOperand &MO2 = MI.getOperand(OpIdx+2);
792 unsigned Rn = getARMRegisterNumbering(MO.getReg());
793 unsigned Rm = getARMRegisterNumbering(MO1.getReg());
794 unsigned ShImm = ARM_AM::getAM2Offset(MO2.getImm());
795 bool isAdd = ARM_AM::getAM2Op(MO2.getImm()) == ARM_AM::add;
796 ARM_AM::ShiftOpc ShOp = ARM_AM::getAM2ShiftOpc(MO2.getImm());
797 unsigned SBits = getShiftOp(ShOp);
806 uint32_t Binary = Rm;
808 Binary |= SBits << 5;
809 Binary |= ShImm << 7;
815 uint32_t ARMMCCodeEmitter::
816 getAddrMode2OpValue(const MCInst &MI, unsigned OpIdx,
817 SmallVectorImpl<MCFixup> &Fixups) const {
819 // {13} 1 == imm12, 0 == Rm
822 const MCOperand &MO = MI.getOperand(OpIdx);
823 unsigned Rn = getARMRegisterNumbering(MO.getReg());
824 uint32_t Binary = getAddrMode2OffsetOpValue(MI, OpIdx + 1, Fixups);
829 uint32_t ARMMCCodeEmitter::
830 getAddrMode2OffsetOpValue(const MCInst &MI, unsigned OpIdx,
831 SmallVectorImpl<MCFixup> &Fixups) const {
832 // {13} 1 == imm12, 0 == Rm
835 const MCOperand &MO = MI.getOperand(OpIdx);
836 const MCOperand &MO1 = MI.getOperand(OpIdx+1);
837 unsigned Imm = MO1.getImm();
838 bool isAdd = ARM_AM::getAM2Op(Imm) == ARM_AM::add;
839 bool isReg = MO.getReg() != 0;
840 uint32_t Binary = ARM_AM::getAM2Offset(Imm);
841 // if reg +/- reg, Rm will be non-zero. Otherwise, we have reg +/- imm12
843 ARM_AM::ShiftOpc ShOp = ARM_AM::getAM2ShiftOpc(Imm);
844 Binary <<= 7; // Shift amount is bits [11:7]
845 Binary |= getShiftOp(ShOp) << 5; // Shift type is bits [6:5]
846 Binary |= getARMRegisterNumbering(MO.getReg()); // Rm is bits [3:0]
848 return Binary | (isAdd << 12) | (isReg << 13);
851 uint32_t ARMMCCodeEmitter::
852 getPostIdxRegOpValue(const MCInst &MI, unsigned OpIdx,
853 SmallVectorImpl<MCFixup> &Fixups) const {
856 const MCOperand &MO = MI.getOperand(OpIdx);
857 const MCOperand &MO1 = MI.getOperand(OpIdx+1);
858 bool isAdd = MO1.getImm() != 0;
859 return getARMRegisterNumbering(MO.getReg()) | (isAdd << 4);
862 uint32_t ARMMCCodeEmitter::
863 getAddrMode3OffsetOpValue(const MCInst &MI, unsigned OpIdx,
864 SmallVectorImpl<MCFixup> &Fixups) const {
865 // {9} 1 == imm8, 0 == Rm
869 const MCOperand &MO = MI.getOperand(OpIdx);
870 const MCOperand &MO1 = MI.getOperand(OpIdx+1);
871 unsigned Imm = MO1.getImm();
872 bool isAdd = ARM_AM::getAM3Op(Imm) == ARM_AM::add;
873 bool isImm = MO.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(MO.getReg());
878 return Imm8 | (isAdd << 8) | (isImm << 9);
881 uint32_t ARMMCCodeEmitter::
882 getAddrMode3OpValue(const MCInst &MI, unsigned OpIdx,
883 SmallVectorImpl<MCFixup> &Fixups) const {
884 // {13} 1 == imm8, 0 == Rm
889 const MCOperand &MO = MI.getOperand(OpIdx);
890 const MCOperand &MO1 = MI.getOperand(OpIdx+1);
891 const MCOperand &MO2 = MI.getOperand(OpIdx+2);
892 unsigned Rn = getARMRegisterNumbering(MO.getReg());
893 unsigned Imm = MO2.getImm();
894 bool isAdd = ARM_AM::getAM3Op(Imm) == ARM_AM::add;
895 bool isImm = MO1.getReg() == 0;
896 uint32_t Imm8 = ARM_AM::getAM3Offset(Imm);
897 // if reg +/- reg, Rm will be non-zero. Otherwise, we have reg +/- imm8
899 Imm8 = getARMRegisterNumbering(MO1.getReg());
900 return (Rn << 9) | Imm8 | (isAdd << 8) | (isImm << 13);
903 /// getAddrModeThumbSPOpValue - Encode the t_addrmode_sp operands.
904 uint32_t ARMMCCodeEmitter::
905 getAddrModeThumbSPOpValue(const MCInst &MI, unsigned OpIdx,
906 SmallVectorImpl<MCFixup> &Fixups) const {
909 const MCOperand &MO1 = MI.getOperand(OpIdx + 1);
910 assert(MI.getOperand(OpIdx).getReg() == ARM::SP &&
911 "Unexpected base register!");
913 // The immediate is already shifted for the implicit zeroes, so no change
915 return MO1.getImm() & 0xff;
918 /// getAddrModeISOpValue - Encode the t_addrmode_is# operands.
919 uint32_t ARMMCCodeEmitter::
920 getAddrModeISOpValue(const MCInst &MI, unsigned OpIdx,
921 SmallVectorImpl<MCFixup> &Fixups) const {
925 const MCOperand &MO = MI.getOperand(OpIdx);
926 const MCOperand &MO1 = MI.getOperand(OpIdx + 1);
927 unsigned Rn = getARMRegisterNumbering(MO.getReg());
928 unsigned Imm5 = MO1.getImm();
929 return ((Imm5 & 0x1f) << 3) | Rn;
932 /// getAddrModePCOpValue - Return encoding for t_addrmode_pc operands.
933 uint32_t ARMMCCodeEmitter::
934 getAddrModePCOpValue(const MCInst &MI, unsigned OpIdx,
935 SmallVectorImpl<MCFixup> &Fixups) const {
936 const MCOperand MO = MI.getOperand(OpIdx);
938 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_cp, Fixups);
939 return (MO.getImm() >> 2);
942 /// getAddrMode5OpValue - Return encoding info for 'reg +/- imm10' operand.
943 uint32_t ARMMCCodeEmitter::
944 getAddrMode5OpValue(const MCInst &MI, unsigned OpIdx,
945 SmallVectorImpl<MCFixup> &Fixups) const {
947 // {8} = (U)nsigned (add == '1', sub == '0')
951 // If The first operand isn't a register, we have a label reference.
952 const MCOperand &MO = MI.getOperand(OpIdx);
954 Reg = getARMRegisterNumbering(ARM::PC); // Rn is PC.
956 isAdd = false; // 'U' bit is handled as part of the fixup.
958 assert(MO.isExpr() && "Unexpected machine operand type!");
959 const MCExpr *Expr = MO.getExpr();
962 Kind = MCFixupKind(ARM::fixup_t2_pcrel_10);
964 Kind = MCFixupKind(ARM::fixup_arm_pcrel_10);
965 Fixups.push_back(MCFixup::Create(0, Expr, Kind));
967 ++MCNumCPRelocations;
969 EncodeAddrModeOpValues(MI, OpIdx, Reg, Imm8, Fixups);
970 isAdd = ARM_AM::getAM5Op(Imm8) == ARM_AM::add;
973 uint32_t Binary = ARM_AM::getAM5Offset(Imm8);
974 // Immediate is always encoded as positive. The 'U' bit controls add vs sub.
977 Binary |= (Reg << 9);
981 unsigned ARMMCCodeEmitter::
982 getSORegRegOpValue(const MCInst &MI, unsigned OpIdx,
983 SmallVectorImpl<MCFixup> &Fixups) const {
984 // Sub-operands are [reg, reg, imm]. The first register is Rm, the reg to be
985 // shifted. The second is Rs, the amount to shift by, and the third specifies
986 // the type of the shift.
994 const MCOperand &MO = MI.getOperand(OpIdx);
995 const MCOperand &MO1 = MI.getOperand(OpIdx + 1);
996 const MCOperand &MO2 = MI.getOperand(OpIdx + 2);
997 ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO2.getImm());
1000 unsigned Binary = getARMRegisterNumbering(MO.getReg());
1002 // Encode the shift opcode.
1004 unsigned Rs = MO1.getReg();
1006 // Set shift operand (bit[7:4]).
1012 default: llvm_unreachable("Unknown shift opc!");
1013 case ARM_AM::lsl: SBits = 0x1; break;
1014 case ARM_AM::lsr: SBits = 0x3; break;
1015 case ARM_AM::asr: SBits = 0x5; break;
1016 case ARM_AM::ror: SBits = 0x7; break;
1020 Binary |= SBits << 4;
1022 // Encode the shift operation Rs.
1023 // Encode Rs bit[11:8].
1024 assert(ARM_AM::getSORegOffset(MO2.getImm()) == 0);
1025 return Binary | (getARMRegisterNumbering(Rs) << ARMII::RegRsShift);
1028 unsigned ARMMCCodeEmitter::
1029 getSORegImmOpValue(const MCInst &MI, unsigned OpIdx,
1030 SmallVectorImpl<MCFixup> &Fixups) const {
1031 // Sub-operands are [reg, imm]. The first register is Rm, the reg to be
1032 // shifted. The second is the amount to shift by.
1039 const MCOperand &MO = MI.getOperand(OpIdx);
1040 const MCOperand &MO1 = MI.getOperand(OpIdx + 1);
1041 ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO1.getImm());
1044 unsigned Binary = getARMRegisterNumbering(MO.getReg());
1046 // Encode the shift opcode.
1049 // Set shift operand (bit[6:4]).
1054 // RRX - 110 and bit[11:8] clear.
1056 default: llvm_unreachable("Unknown shift opc!");
1057 case ARM_AM::lsl: SBits = 0x0; break;
1058 case ARM_AM::lsr: SBits = 0x2; break;
1059 case ARM_AM::asr: SBits = 0x4; break;
1060 case ARM_AM::ror: SBits = 0x6; break;
1066 // Encode shift_imm bit[11:7].
1067 Binary |= SBits << 4;
1068 unsigned Offset = ARM_AM::getSORegOffset(MO1.getImm());
1069 assert(Offset && "Offset must be in range 1-32!");
1070 if (Offset == 32) Offset = 0;
1071 return Binary | (Offset << 7);
1075 unsigned ARMMCCodeEmitter::
1076 getT2AddrModeSORegOpValue(const MCInst &MI, unsigned OpNum,
1077 SmallVectorImpl<MCFixup> &Fixups) const {
1078 const MCOperand &MO1 = MI.getOperand(OpNum);
1079 const MCOperand &MO2 = MI.getOperand(OpNum+1);
1080 const MCOperand &MO3 = MI.getOperand(OpNum+2);
1082 // Encoded as [Rn, Rm, imm].
1083 // FIXME: Needs fixup support.
1084 unsigned Value = getARMRegisterNumbering(MO1.getReg());
1086 Value |= getARMRegisterNumbering(MO2.getReg());
1088 Value |= MO3.getImm();
1093 unsigned ARMMCCodeEmitter::
1094 getT2AddrModeImm8OpValue(const MCInst &MI, unsigned OpNum,
1095 SmallVectorImpl<MCFixup> &Fixups) const {
1096 const MCOperand &MO1 = MI.getOperand(OpNum);
1097 const MCOperand &MO2 = MI.getOperand(OpNum+1);
1099 // FIXME: Needs fixup support.
1100 unsigned Value = getARMRegisterNumbering(MO1.getReg());
1102 // Even though the immediate is 8 bits long, we need 9 bits in order
1103 // to represent the (inverse of the) sign bit.
1105 int32_t tmp = (int32_t)MO2.getImm();
1109 Value |= 256; // Set the ADD bit
1114 unsigned ARMMCCodeEmitter::
1115 getT2AddrModeImm8OffsetOpValue(const MCInst &MI, unsigned OpNum,
1116 SmallVectorImpl<MCFixup> &Fixups) const {
1117 const MCOperand &MO1 = MI.getOperand(OpNum);
1119 // FIXME: Needs fixup support.
1121 int32_t tmp = (int32_t)MO1.getImm();
1125 Value |= 256; // Set the ADD bit
1130 unsigned ARMMCCodeEmitter::
1131 getT2AddrModeImm12OffsetOpValue(const MCInst &MI, unsigned OpNum,
1132 SmallVectorImpl<MCFixup> &Fixups) const {
1133 const MCOperand &MO1 = MI.getOperand(OpNum);
1135 // FIXME: Needs fixup support.
1137 int32_t tmp = (int32_t)MO1.getImm();
1141 Value |= 4096; // Set the ADD bit
1142 Value |= tmp & 4095;
1146 unsigned ARMMCCodeEmitter::
1147 getT2SORegOpValue(const MCInst &MI, unsigned OpIdx,
1148 SmallVectorImpl<MCFixup> &Fixups) const {
1149 // Sub-operands are [reg, imm]. The first register is Rm, the reg to be
1150 // shifted. The second is the amount to shift by.
1157 const MCOperand &MO = MI.getOperand(OpIdx);
1158 const MCOperand &MO1 = MI.getOperand(OpIdx + 1);
1159 ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO1.getImm());
1162 unsigned Binary = getARMRegisterNumbering(MO.getReg());
1164 // Encode the shift opcode.
1166 // Set shift operand (bit[6:4]).
1172 default: llvm_unreachable("Unknown shift opc!");
1173 case ARM_AM::lsl: SBits = 0x0; break;
1174 case ARM_AM::lsr: SBits = 0x2; break;
1175 case ARM_AM::asr: SBits = 0x4; break;
1176 case ARM_AM::ror: SBits = 0x6; break;
1179 Binary |= SBits << 4;
1180 if (SOpc == ARM_AM::rrx)
1183 // Encode shift_imm bit[11:7].
1184 return Binary | ARM_AM::getSORegOffset(MO1.getImm()) << 7;
1187 unsigned ARMMCCodeEmitter::
1188 getBitfieldInvertedMaskOpValue(const MCInst &MI, unsigned Op,
1189 SmallVectorImpl<MCFixup> &Fixups) const {
1190 // 10 bits. lower 5 bits are are the lsb of the mask, high five bits are the
1192 const MCOperand &MO = MI.getOperand(Op);
1193 uint32_t v = ~MO.getImm();
1194 uint32_t lsb = CountTrailingZeros_32(v);
1195 uint32_t msb = (32 - CountLeadingZeros_32 (v)) - 1;
1196 assert (v != 0 && lsb < 32 && msb < 32 && "Illegal bitfield mask!");
1197 return lsb | (msb << 5);
1200 unsigned ARMMCCodeEmitter::
1201 getMsbOpValue(const MCInst &MI, unsigned Op,
1202 SmallVectorImpl<MCFixup> &Fixups) const {
1204 uint32_t lsb = MI.getOperand(Op-1).getImm();
1205 uint32_t width = MI.getOperand(Op).getImm();
1206 uint32_t msb = lsb+width-1;
1207 assert (width != 0 && msb < 32 && "Illegal bit width!");
1211 unsigned ARMMCCodeEmitter::
1212 getRegisterListOpValue(const MCInst &MI, unsigned Op,
1213 SmallVectorImpl<MCFixup> &Fixups) const {
1216 // {7-0} = Number of registers
1219 // {15-0} = Bitfield of GPRs.
1220 unsigned Reg = MI.getOperand(Op).getReg();
1221 bool SPRRegs = llvm::ARMMCRegisterClasses[ARM::SPRRegClassID].contains(Reg);
1222 bool DPRRegs = llvm::ARMMCRegisterClasses[ARM::DPRRegClassID].contains(Reg);
1224 unsigned Binary = 0;
1226 if (SPRRegs || DPRRegs) {
1228 unsigned RegNo = getARMRegisterNumbering(Reg);
1229 unsigned NumRegs = (MI.getNumOperands() - Op) & 0xff;
1230 Binary |= (RegNo & 0x1f) << 8;
1234 Binary |= NumRegs * 2;
1236 for (unsigned I = Op, E = MI.getNumOperands(); I < E; ++I) {
1237 unsigned RegNo = getARMRegisterNumbering(MI.getOperand(I).getReg());
1238 Binary |= 1 << RegNo;
1245 /// getAddrMode6AddressOpValue - Encode an addrmode6 register number along
1246 /// with the alignment operand.
1247 unsigned ARMMCCodeEmitter::
1248 getAddrMode6AddressOpValue(const MCInst &MI, unsigned Op,
1249 SmallVectorImpl<MCFixup> &Fixups) const {
1250 const MCOperand &Reg = MI.getOperand(Op);
1251 const MCOperand &Imm = MI.getOperand(Op + 1);
1253 unsigned RegNo = getARMRegisterNumbering(Reg.getReg());
1256 switch (Imm.getImm()) {
1260 case 8: Align = 0x01; break;
1261 case 16: Align = 0x02; break;
1262 case 32: Align = 0x03; break;
1265 return RegNo | (Align << 4);
1268 /// getAddrMode6OneLane32AddressOpValue - Encode an addrmode6 register number
1269 /// along with the alignment operand for use in VST1 and VLD1 with size 32.
1270 unsigned ARMMCCodeEmitter::
1271 getAddrMode6OneLane32AddressOpValue(const MCInst &MI, unsigned Op,
1272 SmallVectorImpl<MCFixup> &Fixups) const {
1273 const MCOperand &Reg = MI.getOperand(Op);
1274 const MCOperand &Imm = MI.getOperand(Op + 1);
1276 unsigned RegNo = getARMRegisterNumbering(Reg.getReg());
1279 switch (Imm.getImm()) {
1284 case 16: Align = 0x00; break;
1285 case 32: Align = 0x03; break;
1288 return RegNo | (Align << 4);
1292 /// getAddrMode6DupAddressOpValue - Encode an addrmode6 register number and
1293 /// alignment operand for use in VLD-dup instructions. This is the same as
1294 /// getAddrMode6AddressOpValue except for the alignment encoding, which is
1295 /// different for VLD4-dup.
1296 unsigned ARMMCCodeEmitter::
1297 getAddrMode6DupAddressOpValue(const MCInst &MI, unsigned Op,
1298 SmallVectorImpl<MCFixup> &Fixups) const {
1299 const MCOperand &Reg = MI.getOperand(Op);
1300 const MCOperand &Imm = MI.getOperand(Op + 1);
1302 unsigned RegNo = getARMRegisterNumbering(Reg.getReg());
1305 switch (Imm.getImm()) {
1309 case 8: Align = 0x01; break;
1310 case 16: Align = 0x03; break;
1313 return RegNo | (Align << 4);
1316 unsigned ARMMCCodeEmitter::
1317 getAddrMode6OffsetOpValue(const MCInst &MI, unsigned Op,
1318 SmallVectorImpl<MCFixup> &Fixups) const {
1319 const MCOperand &MO = MI.getOperand(Op);
1320 if (MO.getReg() == 0) return 0x0D;
1324 unsigned ARMMCCodeEmitter::
1325 getShiftRight8Imm(const MCInst &MI, unsigned Op,
1326 SmallVectorImpl<MCFixup> &Fixups) const {
1327 return 8 - MI.getOperand(Op).getImm();
1330 unsigned ARMMCCodeEmitter::
1331 getShiftRight16Imm(const MCInst &MI, unsigned Op,
1332 SmallVectorImpl<MCFixup> &Fixups) const {
1333 return 16 - MI.getOperand(Op).getImm();
1336 unsigned ARMMCCodeEmitter::
1337 getShiftRight32Imm(const MCInst &MI, unsigned Op,
1338 SmallVectorImpl<MCFixup> &Fixups) const {
1339 return 32 - MI.getOperand(Op).getImm();
1342 unsigned ARMMCCodeEmitter::
1343 getShiftRight64Imm(const MCInst &MI, unsigned Op,
1344 SmallVectorImpl<MCFixup> &Fixups) const {
1345 return 64 - MI.getOperand(Op).getImm();
1348 void ARMMCCodeEmitter::
1349 EncodeInstruction(const MCInst &MI, raw_ostream &OS,
1350 SmallVectorImpl<MCFixup> &Fixups) const {
1351 // Pseudo instructions don't get encoded.
1352 const MCInstrDesc &Desc = MCII.get(MI.getOpcode());
1353 uint64_t TSFlags = Desc.TSFlags;
1354 if ((TSFlags & ARMII::FormMask) == ARMII::Pseudo)
1358 if (Desc.getSize() == 2 || Desc.getSize() == 4)
1359 Size = Desc.getSize();
1361 llvm_unreachable("Unexpected instruction size!");
1363 uint32_t Binary = getBinaryCodeForInstr(MI, Fixups);
1364 // Thumb 32-bit wide instructions need to emit the high order halfword
1366 if (isThumb() && Size == 4) {
1367 EmitConstant(Binary >> 16, 2, OS);
1368 EmitConstant(Binary & 0xffff, 2, OS);
1370 EmitConstant(Binary, Size, OS);
1371 ++MCNumEmitted; // Keep track of the # of mi's emitted.
1374 #include "ARMGenMCCodeEmitter.inc"