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 /// getAddrMode3OffsetOpValue - Return encoding for am3offset operands.
188 uint32_t getAddrMode3OffsetOpValue(const MCInst &MI, unsigned OpIdx,
189 SmallVectorImpl<MCFixup> &Fixups) const;
191 /// getAddrMode3OpValue - Return encoding for addrmode3 operands.
192 uint32_t getAddrMode3OpValue(const MCInst &MI, unsigned OpIdx,
193 SmallVectorImpl<MCFixup> &Fixups) const;
195 /// getAddrModeThumbSPOpValue - Return encoding info for 'reg +/- imm12'
197 uint32_t getAddrModeThumbSPOpValue(const MCInst &MI, unsigned OpIdx,
198 SmallVectorImpl<MCFixup> &Fixups) const;
200 /// getAddrModeISOpValue - Encode the t_addrmode_is# operands.
201 uint32_t getAddrModeISOpValue(const MCInst &MI, unsigned OpIdx,
202 SmallVectorImpl<MCFixup> &Fixups) const;
204 /// getAddrModePCOpValue - Return encoding for t_addrmode_pc operands.
205 uint32_t getAddrModePCOpValue(const MCInst &MI, unsigned OpIdx,
206 SmallVectorImpl<MCFixup> &Fixups) const;
208 /// getAddrMode5OpValue - Return encoding info for 'reg +/- imm8' operand.
209 uint32_t getAddrMode5OpValue(const MCInst &MI, unsigned OpIdx,
210 SmallVectorImpl<MCFixup> &Fixups) const;
212 /// getCCOutOpValue - Return encoding of the 's' bit.
213 unsigned getCCOutOpValue(const MCInst &MI, unsigned Op,
214 SmallVectorImpl<MCFixup> &Fixups) const {
215 // The operand is either reg0 or CPSR. The 's' bit is encoded as '0' or
217 return MI.getOperand(Op).getReg() == ARM::CPSR;
220 /// getSOImmOpValue - Return an encoded 12-bit shifted-immediate value.
221 unsigned getSOImmOpValue(const MCInst &MI, unsigned Op,
222 SmallVectorImpl<MCFixup> &Fixups) const {
223 unsigned SoImm = MI.getOperand(Op).getImm();
224 int SoImmVal = ARM_AM::getSOImmVal(SoImm);
225 assert(SoImmVal != -1 && "Not a valid so_imm value!");
227 // Encode rotate_imm.
228 unsigned Binary = (ARM_AM::getSOImmValRot((unsigned)SoImmVal) >> 1)
229 << ARMII::SoRotImmShift;
232 Binary |= ARM_AM::getSOImmValImm((unsigned)SoImmVal);
236 /// getT2SOImmOpValue - Return an encoded 12-bit shifted-immediate value.
237 unsigned getT2SOImmOpValue(const MCInst &MI, unsigned Op,
238 SmallVectorImpl<MCFixup> &Fixups) const {
239 unsigned SoImm = MI.getOperand(Op).getImm();
240 unsigned Encoded = ARM_AM::getT2SOImmVal(SoImm);
241 assert(Encoded != ~0U && "Not a Thumb2 so_imm value?");
245 unsigned getT2AddrModeSORegOpValue(const MCInst &MI, unsigned OpNum,
246 SmallVectorImpl<MCFixup> &Fixups) const;
247 unsigned getT2AddrModeImm8OpValue(const MCInst &MI, unsigned OpNum,
248 SmallVectorImpl<MCFixup> &Fixups) const;
249 unsigned getT2AddrModeImm8OffsetOpValue(const MCInst &MI, unsigned OpNum,
250 SmallVectorImpl<MCFixup> &Fixups) const;
251 unsigned getT2AddrModeImm12OffsetOpValue(const MCInst &MI, unsigned OpNum,
252 SmallVectorImpl<MCFixup> &Fixups) const;
254 /// getSORegOpValue - Return an encoded so_reg shifted register value.
255 unsigned getSORegRegOpValue(const MCInst &MI, unsigned Op,
256 SmallVectorImpl<MCFixup> &Fixups) const;
257 unsigned getSORegImmOpValue(const MCInst &MI, unsigned Op,
258 SmallVectorImpl<MCFixup> &Fixups) const;
259 unsigned getT2SORegOpValue(const MCInst &MI, unsigned Op,
260 SmallVectorImpl<MCFixup> &Fixups) const;
262 unsigned getImmMinusOneOpValue(const MCInst &MI, unsigned Op,
263 SmallVectorImpl<MCFixup> &Fixups) const {
264 return MI.getOperand(Op).getImm() - 1;
267 unsigned getNEONVcvtImm32OpValue(const MCInst &MI, unsigned Op,
268 SmallVectorImpl<MCFixup> &Fixups) const {
269 return 64 - MI.getOperand(Op).getImm();
272 unsigned getBitfieldInvertedMaskOpValue(const MCInst &MI, unsigned Op,
273 SmallVectorImpl<MCFixup> &Fixups) const;
275 unsigned getMsbOpValue(const MCInst &MI, unsigned Op,
276 SmallVectorImpl<MCFixup> &Fixups) const;
278 unsigned getRegisterListOpValue(const MCInst &MI, unsigned Op,
279 SmallVectorImpl<MCFixup> &Fixups) const;
280 unsigned getAddrMode6AddressOpValue(const MCInst &MI, unsigned Op,
281 SmallVectorImpl<MCFixup> &Fixups) const;
282 unsigned getAddrMode6OneLane32AddressOpValue(const MCInst &MI, unsigned Op,
283 SmallVectorImpl<MCFixup> &Fixups) const;
284 unsigned getAddrMode6DupAddressOpValue(const MCInst &MI, unsigned Op,
285 SmallVectorImpl<MCFixup> &Fixups) const;
286 unsigned getAddrMode6OffsetOpValue(const MCInst &MI, unsigned Op,
287 SmallVectorImpl<MCFixup> &Fixups) const;
289 unsigned getShiftRight8Imm(const MCInst &MI, unsigned Op,
290 SmallVectorImpl<MCFixup> &Fixups) const;
291 unsigned getShiftRight16Imm(const MCInst &MI, unsigned Op,
292 SmallVectorImpl<MCFixup> &Fixups) const;
293 unsigned getShiftRight32Imm(const MCInst &MI, unsigned Op,
294 SmallVectorImpl<MCFixup> &Fixups) const;
295 unsigned getShiftRight64Imm(const MCInst &MI, unsigned Op,
296 SmallVectorImpl<MCFixup> &Fixups) const;
298 unsigned NEONThumb2DataIPostEncoder(const MCInst &MI,
299 unsigned EncodedValue) const;
300 unsigned NEONThumb2LoadStorePostEncoder(const MCInst &MI,
301 unsigned EncodedValue) const;
302 unsigned NEONThumb2DupPostEncoder(const MCInst &MI,
303 unsigned EncodedValue) const;
305 unsigned VFPThumb2PostEncoder(const MCInst &MI,
306 unsigned EncodedValue) const;
308 void EmitByte(unsigned char C, raw_ostream &OS) const {
312 void EmitConstant(uint64_t Val, unsigned Size, raw_ostream &OS) const {
313 // Output the constant in little endian byte order.
314 for (unsigned i = 0; i != Size; ++i) {
315 EmitByte(Val & 255, OS);
320 void EncodeInstruction(const MCInst &MI, raw_ostream &OS,
321 SmallVectorImpl<MCFixup> &Fixups) const;
324 } // end anonymous namespace
326 MCCodeEmitter *llvm::createARMMCCodeEmitter(const MCInstrInfo &MCII,
327 const MCSubtargetInfo &STI,
329 return new ARMMCCodeEmitter(MCII, STI, Ctx);
332 /// NEONThumb2DataIPostEncoder - Post-process encoded NEON data-processing
333 /// instructions, and rewrite them to their Thumb2 form if we are currently in
335 unsigned ARMMCCodeEmitter::NEONThumb2DataIPostEncoder(const MCInst &MI,
336 unsigned EncodedValue) const {
338 // NEON Thumb2 data-processsing encodings are very simple: bit 24 is moved
339 // to bit 12 of the high half-word (i.e. bit 28), and bits 27-24 are
341 unsigned Bit24 = EncodedValue & 0x01000000;
342 unsigned Bit28 = Bit24 << 4;
343 EncodedValue &= 0xEFFFFFFF;
344 EncodedValue |= Bit28;
345 EncodedValue |= 0x0F000000;
351 /// NEONThumb2LoadStorePostEncoder - Post-process encoded NEON load/store
352 /// instructions, and rewrite them to their Thumb2 form if we are currently in
354 unsigned ARMMCCodeEmitter::NEONThumb2LoadStorePostEncoder(const MCInst &MI,
355 unsigned EncodedValue) const {
357 EncodedValue &= 0xF0FFFFFF;
358 EncodedValue |= 0x09000000;
364 /// NEONThumb2DupPostEncoder - Post-process encoded NEON vdup
365 /// instructions, and rewrite them to their Thumb2 form if we are currently in
367 unsigned ARMMCCodeEmitter::NEONThumb2DupPostEncoder(const MCInst &MI,
368 unsigned EncodedValue) const {
370 EncodedValue &= 0x00FFFFFF;
371 EncodedValue |= 0xEE000000;
377 /// VFPThumb2PostEncoder - Post-process encoded VFP instructions and rewrite
378 /// them to their Thumb2 form if we are currently in Thumb2 mode.
379 unsigned ARMMCCodeEmitter::
380 VFPThumb2PostEncoder(const MCInst &MI, unsigned EncodedValue) const {
382 EncodedValue &= 0x0FFFFFFF;
383 EncodedValue |= 0xE0000000;
388 /// getMachineOpValue - Return binary encoding of operand. If the machine
389 /// operand requires relocation, record the relocation and return zero.
390 unsigned ARMMCCodeEmitter::
391 getMachineOpValue(const MCInst &MI, const MCOperand &MO,
392 SmallVectorImpl<MCFixup> &Fixups) const {
394 unsigned Reg = MO.getReg();
395 unsigned RegNo = getARMRegisterNumbering(Reg);
397 // Q registers are encoded as 2x their register number.
401 case ARM::Q0: case ARM::Q1: case ARM::Q2: case ARM::Q3:
402 case ARM::Q4: case ARM::Q5: case ARM::Q6: case ARM::Q7:
403 case ARM::Q8: case ARM::Q9: case ARM::Q10: case ARM::Q11:
404 case ARM::Q12: case ARM::Q13: case ARM::Q14: case ARM::Q15:
407 } else if (MO.isImm()) {
408 return static_cast<unsigned>(MO.getImm());
409 } else if (MO.isFPImm()) {
410 return static_cast<unsigned>(APFloat(MO.getFPImm())
411 .bitcastToAPInt().getHiBits(32).getLimitedValue());
414 llvm_unreachable("Unable to encode MCOperand!");
418 /// getAddrModeImmOpValue - Return encoding info for 'reg +/- imm' operand.
419 bool ARMMCCodeEmitter::
420 EncodeAddrModeOpValues(const MCInst &MI, unsigned OpIdx, unsigned &Reg,
421 unsigned &Imm, SmallVectorImpl<MCFixup> &Fixups) const {
422 const MCOperand &MO = MI.getOperand(OpIdx);
423 const MCOperand &MO1 = MI.getOperand(OpIdx + 1);
425 Reg = getARMRegisterNumbering(MO.getReg());
427 int32_t SImm = MO1.getImm();
430 // Special value for #-0
431 if (SImm == INT32_MIN)
434 // Immediate is always encoded as positive. The 'U' bit controls add vs sub.
444 /// getBranchTargetOpValue - Helper function to get the branch target operand,
445 /// which is either an immediate or requires a fixup.
446 static uint32_t getBranchTargetOpValue(const MCInst &MI, unsigned OpIdx,
448 SmallVectorImpl<MCFixup> &Fixups) {
449 const MCOperand &MO = MI.getOperand(OpIdx);
451 // If the destination is an immediate, we have nothing to do.
452 if (MO.isImm()) return MO.getImm();
453 assert(MO.isExpr() && "Unexpected branch target type!");
454 const MCExpr *Expr = MO.getExpr();
455 MCFixupKind Kind = MCFixupKind(FixupKind);
456 Fixups.push_back(MCFixup::Create(0, Expr, Kind));
458 // All of the information is in the fixup.
462 /// getThumbBLTargetOpValue - Return encoding info for immediate branch target.
463 uint32_t ARMMCCodeEmitter::
464 getThumbBLTargetOpValue(const MCInst &MI, unsigned OpIdx,
465 SmallVectorImpl<MCFixup> &Fixups) const {
466 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_bl, Fixups);
469 /// getThumbBLXTargetOpValue - Return encoding info for Thumb immediate
470 /// BLX branch target.
471 uint32_t ARMMCCodeEmitter::
472 getThumbBLXTargetOpValue(const MCInst &MI, unsigned OpIdx,
473 SmallVectorImpl<MCFixup> &Fixups) const {
474 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_blx, Fixups);
477 /// getThumbBRTargetOpValue - Return encoding info for Thumb branch target.
478 uint32_t ARMMCCodeEmitter::
479 getThumbBRTargetOpValue(const MCInst &MI, unsigned OpIdx,
480 SmallVectorImpl<MCFixup> &Fixups) const {
481 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_br, Fixups);
484 /// getThumbBCCTargetOpValue - Return encoding info for Thumb branch target.
485 uint32_t ARMMCCodeEmitter::
486 getThumbBCCTargetOpValue(const MCInst &MI, unsigned OpIdx,
487 SmallVectorImpl<MCFixup> &Fixups) const {
488 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_bcc, Fixups);
491 /// getThumbCBTargetOpValue - Return encoding info for Thumb branch target.
492 uint32_t ARMMCCodeEmitter::
493 getThumbCBTargetOpValue(const MCInst &MI, unsigned OpIdx,
494 SmallVectorImpl<MCFixup> &Fixups) const {
495 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_cb, Fixups);
498 /// Return true if this branch has a non-always predication
499 static bool HasConditionalBranch(const MCInst &MI) {
500 int NumOp = MI.getNumOperands();
502 for (int i = 0; i < NumOp-1; ++i) {
503 const MCOperand &MCOp1 = MI.getOperand(i);
504 const MCOperand &MCOp2 = MI.getOperand(i + 1);
505 if (MCOp1.isImm() && MCOp2.isReg() &&
506 (MCOp2.getReg() == 0 || MCOp2.getReg() == ARM::CPSR)) {
507 if (ARMCC::CondCodes(MCOp1.getImm()) != ARMCC::AL)
515 /// getBranchTargetOpValue - Return encoding info for 24-bit immediate branch
517 uint32_t ARMMCCodeEmitter::
518 getBranchTargetOpValue(const MCInst &MI, unsigned OpIdx,
519 SmallVectorImpl<MCFixup> &Fixups) const {
520 // FIXME: This really, really shouldn't use TargetMachine. We don't want
521 // coupling between MC and TM anywhere we can help it.
524 ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_t2_condbranch, Fixups);
525 return getARMBranchTargetOpValue(MI, OpIdx, Fixups);
528 /// getBranchTargetOpValue - Return encoding info for 24-bit immediate branch
530 uint32_t ARMMCCodeEmitter::
531 getARMBranchTargetOpValue(const MCInst &MI, unsigned OpIdx,
532 SmallVectorImpl<MCFixup> &Fixups) const {
533 if (HasConditionalBranch(MI))
534 return ::getBranchTargetOpValue(MI, OpIdx,
535 ARM::fixup_arm_condbranch, Fixups);
536 return ::getBranchTargetOpValue(MI, OpIdx,
537 ARM::fixup_arm_uncondbranch, Fixups);
543 /// getUnconditionalBranchTargetOpValue - Return encoding info for 24-bit
544 /// immediate branch target.
545 uint32_t ARMMCCodeEmitter::
546 getUnconditionalBranchTargetOpValue(const MCInst &MI, unsigned OpIdx,
547 SmallVectorImpl<MCFixup> &Fixups) const {
549 ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_t2_uncondbranch, Fixups);
550 bool I = (Val & 0x800000);
551 bool J1 = (Val & 0x400000);
552 bool J2 = (Val & 0x200000);
566 /// getAdrLabelOpValue - Return encoding info for 12-bit immediate ADR label
568 uint32_t ARMMCCodeEmitter::
569 getAdrLabelOpValue(const MCInst &MI, unsigned OpIdx,
570 SmallVectorImpl<MCFixup> &Fixups) const {
571 assert(MI.getOperand(OpIdx).isExpr() && "Unexpected adr target type!");
572 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_adr_pcrel_12,
576 /// getAdrLabelOpValue - Return encoding info for 12-bit immediate ADR label
578 uint32_t ARMMCCodeEmitter::
579 getT2AdrLabelOpValue(const MCInst &MI, unsigned OpIdx,
580 SmallVectorImpl<MCFixup> &Fixups) const {
581 assert(MI.getOperand(OpIdx).isExpr() && "Unexpected adr target type!");
582 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_t2_adr_pcrel_12,
586 /// getAdrLabelOpValue - Return encoding info for 8-bit immediate ADR label
588 uint32_t ARMMCCodeEmitter::
589 getThumbAdrLabelOpValue(const MCInst &MI, unsigned OpIdx,
590 SmallVectorImpl<MCFixup> &Fixups) const {
591 assert(MI.getOperand(OpIdx).isExpr() && "Unexpected adr target type!");
592 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_thumb_adr_pcrel_10,
596 /// getThumbAddrModeRegRegOpValue - Return encoding info for 'reg + reg'
598 uint32_t ARMMCCodeEmitter::
599 getThumbAddrModeRegRegOpValue(const MCInst &MI, unsigned OpIdx,
600 SmallVectorImpl<MCFixup> &) const {
604 const MCOperand &MO1 = MI.getOperand(OpIdx);
605 const MCOperand &MO2 = MI.getOperand(OpIdx + 1);
606 unsigned Rn = getARMRegisterNumbering(MO1.getReg());
607 unsigned Rm = getARMRegisterNumbering(MO2.getReg());
608 return (Rm << 3) | Rn;
611 /// getAddrModeImm12OpValue - Return encoding info for 'reg +/- imm12' operand.
612 uint32_t ARMMCCodeEmitter::
613 getAddrModeImm12OpValue(const MCInst &MI, unsigned OpIdx,
614 SmallVectorImpl<MCFixup> &Fixups) const {
616 // {12} = (U)nsigned (add == '1', sub == '0')
620 // If The first operand isn't a register, we have a label reference.
621 const MCOperand &MO = MI.getOperand(OpIdx);
623 Reg = getARMRegisterNumbering(ARM::PC); // Rn is PC.
625 isAdd = false ; // 'U' bit is set as part of the fixup.
627 assert(MO.isExpr() && "Unexpected machine operand type!");
628 const MCExpr *Expr = MO.getExpr();
632 Kind = MCFixupKind(ARM::fixup_t2_ldst_pcrel_12);
634 Kind = MCFixupKind(ARM::fixup_arm_ldst_pcrel_12);
635 Fixups.push_back(MCFixup::Create(0, Expr, Kind));
637 ++MCNumCPRelocations;
639 isAdd = EncodeAddrModeOpValues(MI, OpIdx, Reg, Imm12, Fixups);
641 uint32_t Binary = Imm12 & 0xfff;
642 // Immediate is always encoded as positive. The 'U' bit controls add vs sub.
645 Binary |= (Reg << 13);
649 /// getT2AddrModeImm8s4OpValue - Return encoding info for
650 /// 'reg +/- imm8<<2' operand.
651 uint32_t ARMMCCodeEmitter::
652 getT2AddrModeImm8s4OpValue(const MCInst &MI, unsigned OpIdx,
653 SmallVectorImpl<MCFixup> &Fixups) const {
655 // {8} = (U)nsigned (add == '1', sub == '0')
659 // If The first operand isn't a register, we have a label reference.
660 const MCOperand &MO = MI.getOperand(OpIdx);
662 Reg = getARMRegisterNumbering(ARM::PC); // Rn is PC.
664 isAdd = false ; // 'U' bit is set as part of the fixup.
666 assert(MO.isExpr() && "Unexpected machine operand type!");
667 const MCExpr *Expr = MO.getExpr();
668 MCFixupKind Kind = MCFixupKind(ARM::fixup_arm_pcrel_10);
669 Fixups.push_back(MCFixup::Create(0, Expr, Kind));
671 ++MCNumCPRelocations;
673 isAdd = EncodeAddrModeOpValues(MI, OpIdx, Reg, Imm8, Fixups);
675 uint32_t Binary = (Imm8 >> 2) & 0xff;
676 // Immediate is always encoded as positive. The 'U' bit controls add vs sub.
679 Binary |= (Reg << 9);
683 // FIXME: This routine assumes that a binary
684 // expression will always result in a PCRel expression
685 // In reality, its only true if one or more subexpressions
686 // is itself a PCRel (i.e. "." in asm or some other pcrel construct)
687 // but this is good enough for now.
688 static bool EvaluateAsPCRel(const MCExpr *Expr) {
689 switch (Expr->getKind()) {
690 default: assert(0 && "Unexpected expression type");
691 case MCExpr::SymbolRef: return false;
692 case MCExpr::Binary: return true;
697 ARMMCCodeEmitter::getHiLo16ImmOpValue(const MCInst &MI, unsigned OpIdx,
698 SmallVectorImpl<MCFixup> &Fixups) const {
699 // {20-16} = imm{15-12}
700 // {11-0} = imm{11-0}
701 const MCOperand &MO = MI.getOperand(OpIdx);
703 // Hi / lo 16 bits already extracted during earlier passes.
704 return static_cast<unsigned>(MO.getImm());
706 // Handle :upper16: and :lower16: assembly prefixes.
707 const MCExpr *E = MO.getExpr();
708 if (E->getKind() == MCExpr::Target) {
709 const ARMMCExpr *ARM16Expr = cast<ARMMCExpr>(E);
710 E = ARM16Expr->getSubExpr();
713 switch (ARM16Expr->getKind()) {
714 default: assert(0 && "Unsupported ARMFixup");
715 case ARMMCExpr::VK_ARM_HI16:
716 if (!isTargetDarwin() && EvaluateAsPCRel(E))
717 Kind = MCFixupKind(isThumb2()
718 ? ARM::fixup_t2_movt_hi16_pcrel
719 : ARM::fixup_arm_movt_hi16_pcrel);
721 Kind = MCFixupKind(isThumb2()
722 ? ARM::fixup_t2_movt_hi16
723 : ARM::fixup_arm_movt_hi16);
725 case ARMMCExpr::VK_ARM_LO16:
726 if (!isTargetDarwin() && EvaluateAsPCRel(E))
727 Kind = MCFixupKind(isThumb2()
728 ? ARM::fixup_t2_movw_lo16_pcrel
729 : ARM::fixup_arm_movw_lo16_pcrel);
731 Kind = MCFixupKind(isThumb2()
732 ? ARM::fixup_t2_movw_lo16
733 : ARM::fixup_arm_movw_lo16);
736 Fixups.push_back(MCFixup::Create(0, E, Kind));
740 llvm_unreachable("Unsupported MCExpr type in MCOperand!");
744 uint32_t ARMMCCodeEmitter::
745 getLdStSORegOpValue(const MCInst &MI, unsigned OpIdx,
746 SmallVectorImpl<MCFixup> &Fixups) const {
747 const MCOperand &MO = MI.getOperand(OpIdx);
748 const MCOperand &MO1 = MI.getOperand(OpIdx+1);
749 const MCOperand &MO2 = MI.getOperand(OpIdx+2);
750 unsigned Rn = getARMRegisterNumbering(MO.getReg());
751 unsigned Rm = getARMRegisterNumbering(MO1.getReg());
752 unsigned ShImm = ARM_AM::getAM2Offset(MO2.getImm());
753 bool isAdd = ARM_AM::getAM2Op(MO2.getImm()) == ARM_AM::add;
754 ARM_AM::ShiftOpc ShOp = ARM_AM::getAM2ShiftOpc(MO2.getImm());
755 unsigned SBits = getShiftOp(ShOp);
764 uint32_t Binary = Rm;
766 Binary |= SBits << 5;
767 Binary |= ShImm << 7;
773 uint32_t ARMMCCodeEmitter::
774 getAddrMode2OpValue(const MCInst &MI, unsigned OpIdx,
775 SmallVectorImpl<MCFixup> &Fixups) const {
777 // {13} 1 == imm12, 0 == Rm
780 const MCOperand &MO = MI.getOperand(OpIdx);
781 unsigned Rn = getARMRegisterNumbering(MO.getReg());
782 uint32_t Binary = getAddrMode2OffsetOpValue(MI, OpIdx + 1, Fixups);
787 uint32_t ARMMCCodeEmitter::
788 getAddrMode2OffsetOpValue(const MCInst &MI, unsigned OpIdx,
789 SmallVectorImpl<MCFixup> &Fixups) const {
790 // {13} 1 == imm12, 0 == Rm
793 const MCOperand &MO = MI.getOperand(OpIdx);
794 const MCOperand &MO1 = MI.getOperand(OpIdx+1);
795 unsigned Imm = MO1.getImm();
796 bool isAdd = ARM_AM::getAM2Op(Imm) == ARM_AM::add;
797 bool isReg = MO.getReg() != 0;
798 uint32_t Binary = ARM_AM::getAM2Offset(Imm);
799 // if reg +/- reg, Rm will be non-zero. Otherwise, we have reg +/- imm12
801 ARM_AM::ShiftOpc ShOp = ARM_AM::getAM2ShiftOpc(Imm);
802 Binary <<= 7; // Shift amount is bits [11:7]
803 Binary |= getShiftOp(ShOp) << 5; // Shift type is bits [6:5]
804 Binary |= getARMRegisterNumbering(MO.getReg()); // Rm is bits [3:0]
806 return Binary | (isAdd << 12) | (isReg << 13);
809 uint32_t ARMMCCodeEmitter::
810 getAddrMode3OffsetOpValue(const MCInst &MI, unsigned OpIdx,
811 SmallVectorImpl<MCFixup> &Fixups) const {
812 // {9} 1 == imm8, 0 == Rm
816 const MCOperand &MO = MI.getOperand(OpIdx);
817 const MCOperand &MO1 = MI.getOperand(OpIdx+1);
818 unsigned Imm = MO1.getImm();
819 bool isAdd = ARM_AM::getAM3Op(Imm) == ARM_AM::add;
820 bool isImm = MO.getReg() == 0;
821 uint32_t Imm8 = ARM_AM::getAM3Offset(Imm);
822 // if reg +/- reg, Rm will be non-zero. Otherwise, we have reg +/- imm8
824 Imm8 = getARMRegisterNumbering(MO.getReg());
825 return Imm8 | (isAdd << 8) | (isImm << 9);
828 uint32_t ARMMCCodeEmitter::
829 getAddrMode3OpValue(const MCInst &MI, unsigned OpIdx,
830 SmallVectorImpl<MCFixup> &Fixups) const {
831 // {13} 1 == imm8, 0 == Rm
836 const MCOperand &MO = MI.getOperand(OpIdx);
837 const MCOperand &MO1 = MI.getOperand(OpIdx+1);
838 const MCOperand &MO2 = MI.getOperand(OpIdx+2);
839 unsigned Rn = getARMRegisterNumbering(MO.getReg());
840 unsigned Imm = MO2.getImm();
841 bool isAdd = ARM_AM::getAM3Op(Imm) == ARM_AM::add;
842 bool isImm = MO1.getReg() == 0;
843 uint32_t Imm8 = ARM_AM::getAM3Offset(Imm);
844 // if reg +/- reg, Rm will be non-zero. Otherwise, we have reg +/- imm8
846 Imm8 = getARMRegisterNumbering(MO1.getReg());
847 return (Rn << 9) | Imm8 | (isAdd << 8) | (isImm << 13);
850 /// getAddrModeThumbSPOpValue - Encode the t_addrmode_sp operands.
851 uint32_t ARMMCCodeEmitter::
852 getAddrModeThumbSPOpValue(const MCInst &MI, unsigned OpIdx,
853 SmallVectorImpl<MCFixup> &Fixups) const {
856 const MCOperand &MO1 = MI.getOperand(OpIdx + 1);
857 assert(MI.getOperand(OpIdx).getReg() == ARM::SP &&
858 "Unexpected base register!");
860 // The immediate is already shifted for the implicit zeroes, so no change
862 return MO1.getImm() & 0xff;
865 /// getAddrModeISOpValue - Encode the t_addrmode_is# operands.
866 uint32_t ARMMCCodeEmitter::
867 getAddrModeISOpValue(const MCInst &MI, unsigned OpIdx,
868 SmallVectorImpl<MCFixup> &Fixups) const {
872 const MCOperand &MO = MI.getOperand(OpIdx);
873 const MCOperand &MO1 = MI.getOperand(OpIdx + 1);
874 unsigned Rn = getARMRegisterNumbering(MO.getReg());
875 unsigned Imm5 = MO1.getImm();
876 return ((Imm5 & 0x1f) << 3) | Rn;
879 /// getAddrModePCOpValue - Return encoding for t_addrmode_pc operands.
880 uint32_t ARMMCCodeEmitter::
881 getAddrModePCOpValue(const MCInst &MI, unsigned OpIdx,
882 SmallVectorImpl<MCFixup> &Fixups) const {
883 return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_cp, Fixups);
886 /// getAddrMode5OpValue - Return encoding info for 'reg +/- imm10' operand.
887 uint32_t ARMMCCodeEmitter::
888 getAddrMode5OpValue(const MCInst &MI, unsigned OpIdx,
889 SmallVectorImpl<MCFixup> &Fixups) const {
891 // {8} = (U)nsigned (add == '1', sub == '0')
895 // If The first operand isn't a register, we have a label reference.
896 const MCOperand &MO = MI.getOperand(OpIdx);
898 Reg = getARMRegisterNumbering(ARM::PC); // Rn is PC.
900 isAdd = false; // 'U' bit is handled as part of the fixup.
902 assert(MO.isExpr() && "Unexpected machine operand type!");
903 const MCExpr *Expr = MO.getExpr();
906 Kind = MCFixupKind(ARM::fixup_t2_pcrel_10);
908 Kind = MCFixupKind(ARM::fixup_arm_pcrel_10);
909 Fixups.push_back(MCFixup::Create(0, Expr, Kind));
911 ++MCNumCPRelocations;
913 EncodeAddrModeOpValues(MI, OpIdx, Reg, Imm8, Fixups);
914 isAdd = ARM_AM::getAM5Op(Imm8) == ARM_AM::add;
917 uint32_t Binary = ARM_AM::getAM5Offset(Imm8);
918 // Immediate is always encoded as positive. The 'U' bit controls add vs sub.
921 Binary |= (Reg << 9);
925 unsigned ARMMCCodeEmitter::
926 getSORegRegOpValue(const MCInst &MI, unsigned OpIdx,
927 SmallVectorImpl<MCFixup> &Fixups) const {
928 // Sub-operands are [reg, reg, imm]. The first register is Rm, the reg to be
929 // shifted. The second is either Rs, the amount to shift by, or reg0 in which
930 // case the imm contains the amount to shift by.
933 // {4} = 1 if reg shift, 0 if imm shift
941 const MCOperand &MO = MI.getOperand(OpIdx);
942 const MCOperand &MO1 = MI.getOperand(OpIdx + 1);
943 const MCOperand &MO2 = MI.getOperand(OpIdx + 2);
944 ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO2.getImm());
947 unsigned Binary = getARMRegisterNumbering(MO.getReg());
949 // Encode the shift opcode.
951 unsigned Rs = MO1.getReg();
953 // Set shift operand (bit[7:4]).
959 default: llvm_unreachable("Unknown shift opc!");
960 case ARM_AM::lsl: SBits = 0x1; break;
961 case ARM_AM::lsr: SBits = 0x3; break;
962 case ARM_AM::asr: SBits = 0x5; break;
963 case ARM_AM::ror: SBits = 0x7; break;
967 Binary |= SBits << 4;
969 // Encode the shift operation Rs or shift_imm (except rrx).
970 // Encode Rs bit[11:8].
971 assert(ARM_AM::getSORegOffset(MO2.getImm()) == 0);
972 return Binary | (getARMRegisterNumbering(Rs) << ARMII::RegRsShift);
975 unsigned ARMMCCodeEmitter::
976 getSORegImmOpValue(const MCInst &MI, unsigned OpIdx,
977 SmallVectorImpl<MCFixup> &Fixups) const {
978 // Sub-operands are [reg, reg, imm]. The first register is Rm, the reg to be
979 // shifted. The second is either Rs, the amount to shift by, or reg0 in which
980 // case the imm contains the amount to shift by.
983 // {4} = 1 if reg shift, 0 if imm shift
991 const MCOperand &MO = MI.getOperand(OpIdx);
992 const MCOperand &MO1 = MI.getOperand(OpIdx + 1);
993 ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO1.getImm());
996 unsigned Binary = getARMRegisterNumbering(MO.getReg());
998 // Encode the shift opcode.
1001 // Set shift operand (bit[6:4]).
1006 // RRX - 110 and bit[11:8] clear.
1008 default: llvm_unreachable("Unknown shift opc!");
1009 case ARM_AM::lsl: SBits = 0x0; break;
1010 case ARM_AM::lsr: SBits = 0x2; break;
1011 case ARM_AM::asr: SBits = 0x4; break;
1012 case ARM_AM::ror: SBits = 0x6; break;
1018 // Encode shift_imm bit[11:7].
1019 Binary |= SBits << 4;
1020 return Binary | ARM_AM::getSORegOffset(MO1.getImm()) << 7;
1024 unsigned ARMMCCodeEmitter::
1025 getT2AddrModeSORegOpValue(const MCInst &MI, unsigned OpNum,
1026 SmallVectorImpl<MCFixup> &Fixups) const {
1027 const MCOperand &MO1 = MI.getOperand(OpNum);
1028 const MCOperand &MO2 = MI.getOperand(OpNum+1);
1029 const MCOperand &MO3 = MI.getOperand(OpNum+2);
1031 // Encoded as [Rn, Rm, imm].
1032 // FIXME: Needs fixup support.
1033 unsigned Value = getARMRegisterNumbering(MO1.getReg());
1035 Value |= getARMRegisterNumbering(MO2.getReg());
1037 Value |= MO3.getImm();
1042 unsigned ARMMCCodeEmitter::
1043 getT2AddrModeImm8OpValue(const MCInst &MI, unsigned OpNum,
1044 SmallVectorImpl<MCFixup> &Fixups) const {
1045 const MCOperand &MO1 = MI.getOperand(OpNum);
1046 const MCOperand &MO2 = MI.getOperand(OpNum+1);
1048 // FIXME: Needs fixup support.
1049 unsigned Value = getARMRegisterNumbering(MO1.getReg());
1051 // Even though the immediate is 8 bits long, we need 9 bits in order
1052 // to represent the (inverse of the) sign bit.
1054 int32_t tmp = (int32_t)MO2.getImm();
1058 Value |= 256; // Set the ADD bit
1063 unsigned ARMMCCodeEmitter::
1064 getT2AddrModeImm8OffsetOpValue(const MCInst &MI, unsigned OpNum,
1065 SmallVectorImpl<MCFixup> &Fixups) const {
1066 const MCOperand &MO1 = MI.getOperand(OpNum);
1068 // FIXME: Needs fixup support.
1070 int32_t tmp = (int32_t)MO1.getImm();
1074 Value |= 256; // Set the ADD bit
1079 unsigned ARMMCCodeEmitter::
1080 getT2AddrModeImm12OffsetOpValue(const MCInst &MI, unsigned OpNum,
1081 SmallVectorImpl<MCFixup> &Fixups) const {
1082 const MCOperand &MO1 = MI.getOperand(OpNum);
1084 // FIXME: Needs fixup support.
1086 int32_t tmp = (int32_t)MO1.getImm();
1090 Value |= 4096; // Set the ADD bit
1091 Value |= tmp & 4095;
1095 unsigned ARMMCCodeEmitter::
1096 getT2SORegOpValue(const MCInst &MI, unsigned OpIdx,
1097 SmallVectorImpl<MCFixup> &Fixups) const {
1098 // Sub-operands are [reg, imm]. The first register is Rm, the reg to be
1099 // shifted. The second is the amount to shift by.
1106 const MCOperand &MO = MI.getOperand(OpIdx);
1107 const MCOperand &MO1 = MI.getOperand(OpIdx + 1);
1108 ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO1.getImm());
1111 unsigned Binary = getARMRegisterNumbering(MO.getReg());
1113 // Encode the shift opcode.
1115 // Set shift operand (bit[6:4]).
1121 default: llvm_unreachable("Unknown shift opc!");
1122 case ARM_AM::lsl: SBits = 0x0; break;
1123 case ARM_AM::lsr: SBits = 0x2; break;
1124 case ARM_AM::asr: SBits = 0x4; break;
1125 case ARM_AM::ror: SBits = 0x6; break;
1128 Binary |= SBits << 4;
1129 if (SOpc == ARM_AM::rrx)
1132 // Encode shift_imm bit[11:7].
1133 return Binary | ARM_AM::getSORegOffset(MO1.getImm()) << 7;
1136 unsigned ARMMCCodeEmitter::
1137 getBitfieldInvertedMaskOpValue(const MCInst &MI, unsigned Op,
1138 SmallVectorImpl<MCFixup> &Fixups) const {
1139 // 10 bits. lower 5 bits are are the lsb of the mask, high five bits are the
1141 const MCOperand &MO = MI.getOperand(Op);
1142 uint32_t v = ~MO.getImm();
1143 uint32_t lsb = CountTrailingZeros_32(v);
1144 uint32_t msb = (32 - CountLeadingZeros_32 (v)) - 1;
1145 assert (v != 0 && lsb < 32 && msb < 32 && "Illegal bitfield mask!");
1146 return lsb | (msb << 5);
1149 unsigned ARMMCCodeEmitter::
1150 getMsbOpValue(const MCInst &MI, unsigned Op,
1151 SmallVectorImpl<MCFixup> &Fixups) const {
1153 uint32_t lsb = MI.getOperand(Op-1).getImm();
1154 uint32_t width = MI.getOperand(Op).getImm();
1155 uint32_t msb = lsb+width-1;
1156 assert (width != 0 && msb < 32 && "Illegal bit width!");
1161 // FIXME: TableGen this?
1162 extern MCRegisterClass ARMMCRegisterClasses[]; // In ARMGenRegisterInfo.inc.
1165 unsigned ARMMCCodeEmitter::
1166 getRegisterListOpValue(const MCInst &MI, unsigned Op,
1167 SmallVectorImpl<MCFixup> &Fixups) const {
1170 // {7-0} = Number of registers
1173 // {15-0} = Bitfield of GPRs.
1174 unsigned Reg = MI.getOperand(Op).getReg();
1175 bool SPRRegs = llvm::ARMMCRegisterClasses[ARM::SPRRegClassID].contains(Reg);
1176 bool DPRRegs = llvm::ARMMCRegisterClasses[ARM::DPRRegClassID].contains(Reg);
1178 unsigned Binary = 0;
1180 if (SPRRegs || DPRRegs) {
1182 unsigned RegNo = getARMRegisterNumbering(Reg);
1183 unsigned NumRegs = (MI.getNumOperands() - Op) & 0xff;
1184 Binary |= (RegNo & 0x1f) << 8;
1188 Binary |= NumRegs * 2;
1190 for (unsigned I = Op, E = MI.getNumOperands(); I < E; ++I) {
1191 unsigned RegNo = getARMRegisterNumbering(MI.getOperand(I).getReg());
1192 Binary |= 1 << RegNo;
1199 /// getAddrMode6AddressOpValue - Encode an addrmode6 register number along
1200 /// with the alignment operand.
1201 unsigned ARMMCCodeEmitter::
1202 getAddrMode6AddressOpValue(const MCInst &MI, unsigned Op,
1203 SmallVectorImpl<MCFixup> &Fixups) const {
1204 const MCOperand &Reg = MI.getOperand(Op);
1205 const MCOperand &Imm = MI.getOperand(Op + 1);
1207 unsigned RegNo = getARMRegisterNumbering(Reg.getReg());
1210 switch (Imm.getImm()) {
1214 case 8: Align = 0x01; break;
1215 case 16: Align = 0x02; break;
1216 case 32: Align = 0x03; break;
1219 return RegNo | (Align << 4);
1222 /// getAddrMode6OneLane32AddressOpValue - Encode an addrmode6 register number
1223 /// along with the alignment operand for use in VST1 and VLD1 with size 32.
1224 unsigned ARMMCCodeEmitter::
1225 getAddrMode6OneLane32AddressOpValue(const MCInst &MI, unsigned Op,
1226 SmallVectorImpl<MCFixup> &Fixups) const {
1227 const MCOperand &Reg = MI.getOperand(Op);
1228 const MCOperand &Imm = MI.getOperand(Op + 1);
1230 unsigned RegNo = getARMRegisterNumbering(Reg.getReg());
1233 switch (Imm.getImm()) {
1238 case 16: Align = 0x00; break;
1239 case 32: Align = 0x03; break;
1242 return RegNo | (Align << 4);
1246 /// getAddrMode6DupAddressOpValue - Encode an addrmode6 register number and
1247 /// alignment operand for use in VLD-dup instructions. This is the same as
1248 /// getAddrMode6AddressOpValue except for the alignment encoding, which is
1249 /// different for VLD4-dup.
1250 unsigned ARMMCCodeEmitter::
1251 getAddrMode6DupAddressOpValue(const MCInst &MI, unsigned Op,
1252 SmallVectorImpl<MCFixup> &Fixups) const {
1253 const MCOperand &Reg = MI.getOperand(Op);
1254 const MCOperand &Imm = MI.getOperand(Op + 1);
1256 unsigned RegNo = getARMRegisterNumbering(Reg.getReg());
1259 switch (Imm.getImm()) {
1263 case 8: Align = 0x01; break;
1264 case 16: Align = 0x03; break;
1267 return RegNo | (Align << 4);
1270 unsigned ARMMCCodeEmitter::
1271 getAddrMode6OffsetOpValue(const MCInst &MI, unsigned Op,
1272 SmallVectorImpl<MCFixup> &Fixups) const {
1273 const MCOperand &MO = MI.getOperand(Op);
1274 if (MO.getReg() == 0) return 0x0D;
1278 unsigned ARMMCCodeEmitter::
1279 getShiftRight8Imm(const MCInst &MI, unsigned Op,
1280 SmallVectorImpl<MCFixup> &Fixups) const {
1281 return 8 - MI.getOperand(Op).getImm();
1284 unsigned ARMMCCodeEmitter::
1285 getShiftRight16Imm(const MCInst &MI, unsigned Op,
1286 SmallVectorImpl<MCFixup> &Fixups) const {
1287 return 16 - MI.getOperand(Op).getImm();
1290 unsigned ARMMCCodeEmitter::
1291 getShiftRight32Imm(const MCInst &MI, unsigned Op,
1292 SmallVectorImpl<MCFixup> &Fixups) const {
1293 return 32 - MI.getOperand(Op).getImm();
1296 unsigned ARMMCCodeEmitter::
1297 getShiftRight64Imm(const MCInst &MI, unsigned Op,
1298 SmallVectorImpl<MCFixup> &Fixups) const {
1299 return 64 - MI.getOperand(Op).getImm();
1302 void ARMMCCodeEmitter::
1303 EncodeInstruction(const MCInst &MI, raw_ostream &OS,
1304 SmallVectorImpl<MCFixup> &Fixups) const {
1305 // Pseudo instructions don't get encoded.
1306 const MCInstrDesc &Desc = MCII.get(MI.getOpcode());
1307 uint64_t TSFlags = Desc.TSFlags;
1308 if ((TSFlags & ARMII::FormMask) == ARMII::Pseudo)
1312 if (Desc.getSize() == 2 || Desc.getSize() == 4)
1313 Size = Desc.getSize();
1315 llvm_unreachable("Unexpected instruction size!");
1317 uint32_t Binary = getBinaryCodeForInstr(MI, Fixups);
1318 // Thumb 32-bit wide instructions need to emit the high order halfword
1320 if (isThumb() && Size == 4) {
1321 EmitConstant(Binary >> 16, 2, OS);
1322 EmitConstant(Binary & 0xffff, 2, OS);
1324 EmitConstant(Binary, Size, OS);
1325 ++MCNumEmitted; // Keep track of the # of mi's emitted.
1328 #include "ARMGenMCCodeEmitter.inc"