1 //===-- ARMDisassembler.cpp - Disassembler for ARM/Thumb ISA --------------===//
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 #include "llvm/MC/MCDisassembler/MCDisassembler.h"
11 #include "MCTargetDesc/ARMAddressingModes.h"
12 #include "MCTargetDesc/ARMBaseInfo.h"
13 #include "MCTargetDesc/ARMMCExpr.h"
14 #include "llvm/MC/MCContext.h"
15 #include "llvm/MC/MCExpr.h"
16 #include "llvm/MC/MCFixedLenDisassembler.h"
17 #include "llvm/MC/MCInst.h"
18 #include "llvm/MC/MCInstrDesc.h"
19 #include "llvm/MC/MCSubtargetInfo.h"
20 #include "llvm/Support/Debug.h"
21 #include "llvm/Support/ErrorHandling.h"
22 #include "llvm/Support/LEB128.h"
23 #include "llvm/Support/TargetRegistry.h"
24 #include "llvm/Support/raw_ostream.h"
29 #define DEBUG_TYPE "arm-disassembler"
31 typedef MCDisassembler::DecodeStatus DecodeStatus;
34 // Handles the condition code status of instructions in IT blocks
38 // Returns the condition code for instruction in IT block
40 unsigned CC = ARMCC::AL;
46 // Advances the IT block state to the next T or E
47 void advanceITState() {
51 // Returns true if the current instruction is in an IT block
52 bool instrInITBlock() {
53 return !ITStates.empty();
56 // Returns true if current instruction is the last instruction in an IT block
57 bool instrLastInITBlock() {
58 return ITStates.size() == 1;
61 // Called when decoding an IT instruction. Sets the IT state for the following
62 // instructions that for the IT block. Firstcond and Mask correspond to the
63 // fields in the IT instruction encoding.
64 void setITState(char Firstcond, char Mask) {
65 // (3 - the number of trailing zeros) is the number of then / else.
66 unsigned CondBit0 = Firstcond & 1;
67 unsigned NumTZ = countTrailingZeros<uint8_t>(Mask);
68 unsigned char CCBits = static_cast<unsigned char>(Firstcond & 0xf);
69 assert(NumTZ <= 3 && "Invalid IT mask!");
70 // push condition codes onto the stack the correct order for the pops
71 for (unsigned Pos = NumTZ+1; Pos <= 3; ++Pos) {
72 bool T = ((Mask >> Pos) & 1) == CondBit0;
74 ITStates.push_back(CCBits);
76 ITStates.push_back(CCBits ^ 1);
78 ITStates.push_back(CCBits);
82 std::vector<unsigned char> ITStates;
87 /// ARM disassembler for all ARM platforms.
88 class ARMDisassembler : public MCDisassembler {
90 ARMDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx) :
91 MCDisassembler(STI, Ctx) {
94 ~ARMDisassembler() override {}
96 DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size,
97 ArrayRef<uint8_t> Bytes, uint64_t Address,
99 raw_ostream &CStream) const override;
102 /// Thumb disassembler for all Thumb platforms.
103 class ThumbDisassembler : public MCDisassembler {
105 ThumbDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx) :
106 MCDisassembler(STI, Ctx) {
109 ~ThumbDisassembler() override {}
111 DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size,
112 ArrayRef<uint8_t> Bytes, uint64_t Address,
113 raw_ostream &VStream,
114 raw_ostream &CStream) const override;
117 mutable ITStatus ITBlock;
118 DecodeStatus AddThumbPredicate(MCInst&) const;
119 void UpdateThumbVFPPredicate(MCInst&) const;
123 static bool Check(DecodeStatus &Out, DecodeStatus In) {
125 case MCDisassembler::Success:
126 // Out stays the same.
128 case MCDisassembler::SoftFail:
131 case MCDisassembler::Fail:
135 llvm_unreachable("Invalid DecodeStatus!");
139 // Forward declare these because the autogenerated code will reference them.
140 // Definitions are further down.
141 static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
142 uint64_t Address, const void *Decoder);
143 static DecodeStatus DecodeGPRnopcRegisterClass(MCInst &Inst,
144 unsigned RegNo, uint64_t Address,
145 const void *Decoder);
146 static DecodeStatus DecodeGPRwithAPSRRegisterClass(MCInst &Inst,
147 unsigned RegNo, uint64_t Address,
148 const void *Decoder);
149 static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
150 uint64_t Address, const void *Decoder);
151 static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
152 uint64_t Address, const void *Decoder);
153 static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
154 uint64_t Address, const void *Decoder);
155 static DecodeStatus DecodeGPRPairRegisterClass(MCInst &Inst, unsigned RegNo,
156 uint64_t Address, const void *Decoder);
157 static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
158 uint64_t Address, const void *Decoder);
159 static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
160 uint64_t Address, const void *Decoder);
161 static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
162 uint64_t Address, const void *Decoder);
163 static DecodeStatus DecodeDPR_VFP2RegisterClass(MCInst &Inst,
166 const void *Decoder);
167 static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
168 uint64_t Address, const void *Decoder);
169 static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
170 uint64_t Address, const void *Decoder);
171 static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
172 unsigned RegNo, uint64_t Address,
173 const void *Decoder);
175 static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
176 uint64_t Address, const void *Decoder);
177 static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
178 uint64_t Address, const void *Decoder);
179 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
180 uint64_t Address, const void *Decoder);
181 static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
182 uint64_t Address, const void *Decoder);
183 static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
184 uint64_t Address, const void *Decoder);
186 static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Insn,
187 uint64_t Address, const void *Decoder);
188 static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
189 uint64_t Address, const void *Decoder);
190 static DecodeStatus DecodeAddrMode2IdxInstruction(MCInst &Inst,
193 const void *Decoder);
194 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Insn,
195 uint64_t Address, const void *Decoder);
196 static DecodeStatus DecodeAddrMode3Instruction(MCInst &Inst,unsigned Insn,
197 uint64_t Address, const void *Decoder);
198 static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Insn,
199 uint64_t Address, const void *Decoder);
200 static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Insn,
201 uint64_t Address, const void *Decoder);
203 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst & Inst,
206 const void *Decoder);
207 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
208 uint64_t Address, const void *Decoder);
209 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
210 uint64_t Address, const void *Decoder);
211 static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
212 uint64_t Address, const void *Decoder);
213 static DecodeStatus DecodeHINTInstruction(MCInst &Inst, unsigned Insn,
214 uint64_t Address, const void *Decoder);
215 static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
216 uint64_t Address, const void *Decoder);
217 static DecodeStatus DecodeTSTInstruction(MCInst &Inst, unsigned Insn,
218 uint64_t Address, const void *Decoder);
219 static DecodeStatus DecodeSETPANInstruction(MCInst &Inst, unsigned Insn,
220 uint64_t Address, const void *Decoder);
221 static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
222 uint64_t Address, const void *Decoder);
223 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
224 uint64_t Address, const void *Decoder);
225 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
226 uint64_t Address, const void *Decoder);
227 static DecodeStatus DecodeAddrMode5FP16Operand(MCInst &Inst, unsigned Val,
228 uint64_t Address, const void *Decoder);
229 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
230 uint64_t Address, const void *Decoder);
231 static DecodeStatus DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
232 uint64_t Address, const void *Decoder);
233 static DecodeStatus DecodeBranchImmInstruction(MCInst &Inst,unsigned Insn,
234 uint64_t Address, const void *Decoder);
235 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
236 uint64_t Address, const void *Decoder);
237 static DecodeStatus DecodeVLDST1Instruction(MCInst &Inst, unsigned Val,
238 uint64_t Address, const void *Decoder);
239 static DecodeStatus DecodeVLDST2Instruction(MCInst &Inst, unsigned Val,
240 uint64_t Address, const void *Decoder);
241 static DecodeStatus DecodeVLDST3Instruction(MCInst &Inst, unsigned Val,
242 uint64_t Address, const void *Decoder);
243 static DecodeStatus DecodeVLDST4Instruction(MCInst &Inst, unsigned Val,
244 uint64_t Address, const void *Decoder);
245 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Val,
246 uint64_t Address, const void *Decoder);
247 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Val,
248 uint64_t Address, const void *Decoder);
249 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Val,
250 uint64_t Address, const void *Decoder);
251 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Val,
252 uint64_t Address, const void *Decoder);
253 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Val,
254 uint64_t Address, const void *Decoder);
255 static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Val,
256 uint64_t Address, const void *Decoder);
257 static DecodeStatus DecodeNEONModImmInstruction(MCInst &Inst,unsigned Val,
258 uint64_t Address, const void *Decoder);
259 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Val,
260 uint64_t Address, const void *Decoder);
261 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
262 uint64_t Address, const void *Decoder);
263 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
264 uint64_t Address, const void *Decoder);
265 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
266 uint64_t Address, const void *Decoder);
267 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
268 uint64_t Address, const void *Decoder);
269 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
270 uint64_t Address, const void *Decoder);
271 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
272 uint64_t Address, const void *Decoder);
273 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Insn,
274 uint64_t Address, const void *Decoder);
275 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Insn,
276 uint64_t Address, const void *Decoder);
277 static DecodeStatus DecodeInstSyncBarrierOption(MCInst &Inst, unsigned Insn,
278 uint64_t Address, const void *Decoder);
279 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Insn,
280 uint64_t Address, const void *Decoder);
281 static DecodeStatus DecodeBankedReg(MCInst &Inst, unsigned Insn,
282 uint64_t Address, const void *Decoder);
283 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
284 uint64_t Address, const void *Decoder);
285 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
286 uint64_t Address, const void *Decoder);
287 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
288 uint64_t Address, const void *Decoder);
289 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
290 uint64_t Address, const void *Decoder);
291 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
292 uint64_t Address, const void *Decoder);
293 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
294 uint64_t Address, const void *Decoder);
295 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
296 uint64_t Address, const void *Decoder);
297 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
298 uint64_t Address, const void *Decoder);
299 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
300 uint64_t Address, const void *Decoder);
301 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
302 uint64_t Address, const void *Decoder);
303 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
304 uint64_t Address, const void *Decoder);
305 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
306 uint64_t Address, const void *Decoder);
307 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
308 uint64_t Address, const void *Decoder);
309 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
310 uint64_t Address, const void *Decoder);
311 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
312 uint64_t Address, const void *Decoder);
313 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
314 uint64_t Address, const void *Decoder);
315 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
316 uint64_t Address, const void *Decoder);
317 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
318 uint64_t Address, const void *Decoder);
319 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
320 uint64_t Address, const void *Decoder);
323 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
324 uint64_t Address, const void *Decoder);
325 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
326 uint64_t Address, const void *Decoder);
327 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
328 uint64_t Address, const void *Decoder);
329 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
330 uint64_t Address, const void *Decoder);
331 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
332 uint64_t Address, const void *Decoder);
333 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
334 uint64_t Address, const void *Decoder);
335 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
336 uint64_t Address, const void *Decoder);
337 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
338 uint64_t Address, const void *Decoder);
339 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
340 uint64_t Address, const void *Decoder);
341 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Val,
342 uint64_t Address, const void *Decoder);
343 static DecodeStatus DecodeT2LoadImm8(MCInst &Inst, unsigned Insn,
344 uint64_t Address, const void* Decoder);
345 static DecodeStatus DecodeT2LoadImm12(MCInst &Inst, unsigned Insn,
346 uint64_t Address, const void* Decoder);
347 static DecodeStatus DecodeT2LoadT(MCInst &Inst, unsigned Insn,
348 uint64_t Address, const void* Decoder);
349 static DecodeStatus DecodeT2LoadLabel(MCInst &Inst, unsigned Insn,
350 uint64_t Address, const void* Decoder);
351 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
352 uint64_t Address, const void *Decoder);
353 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
354 uint64_t Address, const void *Decoder);
355 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
356 uint64_t Address, const void *Decoder);
357 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
358 uint64_t Address, const void *Decoder);
359 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
360 uint64_t Address, const void *Decoder);
361 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Val,
362 uint64_t Address, const void *Decoder);
363 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
364 uint64_t Address, const void *Decoder);
365 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
366 uint64_t Address, const void *Decoder);
367 static DecodeStatus DecodeQADDInstruction(MCInst &Inst, unsigned Insn,
368 uint64_t Address, const void *Decoder);
369 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Insn,
370 uint64_t Address, const void *Decoder);
371 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
372 uint64_t Address, const void *Decoder);
373 static DecodeStatus DecodeThumbTableBranch(MCInst &Inst, unsigned Val,
374 uint64_t Address, const void *Decoder);
375 static DecodeStatus DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Val,
376 uint64_t Address, const void *Decoder);
377 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
378 uint64_t Address, const void *Decoder);
379 static DecodeStatus DecodeThumbBCCTargetOperand(MCInst &Inst,unsigned Val,
380 uint64_t Address, const void *Decoder);
381 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
382 uint64_t Address, const void *Decoder);
383 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Val,
384 uint64_t Address, const void *Decoder);
385 static DecodeStatus DecodeT2LDRDPreInstruction(MCInst &Inst,unsigned Insn,
386 uint64_t Address, const void *Decoder);
387 static DecodeStatus DecodeT2STRDPreInstruction(MCInst &Inst,unsigned Insn,
388 uint64_t Address, const void *Decoder);
389 static DecodeStatus DecodeT2Adr(MCInst &Inst, unsigned Val,
390 uint64_t Address, const void *Decoder);
391 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Val,
392 uint64_t Address, const void *Decoder);
393 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, unsigned Val,
394 uint64_t Address, const void *Decoder);
396 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
397 uint64_t Address, const void *Decoder);
398 static DecodeStatus DecoderForMRRC2AndMCRR2(llvm::MCInst &Inst, unsigned Val,
399 uint64_t Address, const void *Decoder);
400 #include "ARMGenDisassemblerTables.inc"
402 static MCDisassembler *createARMDisassembler(const Target &T,
403 const MCSubtargetInfo &STI,
405 return new ARMDisassembler(STI, Ctx);
408 static MCDisassembler *createThumbDisassembler(const Target &T,
409 const MCSubtargetInfo &STI,
411 return new ThumbDisassembler(STI, Ctx);
414 // Post-decoding checks
415 static DecodeStatus checkDecodedInstruction(MCInst &MI, uint64_t &Size,
416 uint64_t Address, raw_ostream &OS,
421 switch (MI.getOpcode()) {
423 // HVC is undefined if condition = 0xf otherwise upredictable
424 // if condition != 0xe
425 uint32_t Cond = (Insn >> 28) & 0xF;
427 return MCDisassembler::Fail;
429 return MCDisassembler::SoftFail;
432 default: return Result;
436 DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
437 ArrayRef<uint8_t> Bytes,
438 uint64_t Address, raw_ostream &OS,
439 raw_ostream &CS) const {
442 assert(!STI.getFeatureBits()[ARM::ModeThumb] &&
443 "Asked to disassemble an ARM instruction but Subtarget is in Thumb "
446 // We want to read exactly 4 bytes of data.
447 if (Bytes.size() < 4) {
449 return MCDisassembler::Fail;
452 // Encoded as a small-endian 32-bit word in the stream.
454 (Bytes[3] << 24) | (Bytes[2] << 16) | (Bytes[1] << 8) | (Bytes[0] << 0);
456 // Calling the auto-generated decoder function.
457 DecodeStatus Result =
458 decodeInstruction(DecoderTableARM32, MI, Insn, Address, this, STI);
459 if (Result != MCDisassembler::Fail) {
461 return checkDecodedInstruction(MI, Size, Address, OS, CS, Insn, Result);
464 // VFP and NEON instructions, similarly, are shared between ARM
466 Result = decodeInstruction(DecoderTableVFP32, MI, Insn, Address, this, STI);
467 if (Result != MCDisassembler::Fail) {
472 Result = decodeInstruction(DecoderTableVFPV832, MI, Insn, Address, this, STI);
473 if (Result != MCDisassembler::Fail) {
479 decodeInstruction(DecoderTableNEONData32, MI, Insn, Address, this, STI);
480 if (Result != MCDisassembler::Fail) {
482 // Add a fake predicate operand, because we share these instruction
483 // definitions with Thumb2 where these instructions are predicable.
484 if (!DecodePredicateOperand(MI, 0xE, Address, this))
485 return MCDisassembler::Fail;
489 Result = decodeInstruction(DecoderTableNEONLoadStore32, MI, Insn, Address,
491 if (Result != MCDisassembler::Fail) {
493 // Add a fake predicate operand, because we share these instruction
494 // definitions with Thumb2 where these instructions are predicable.
495 if (!DecodePredicateOperand(MI, 0xE, Address, this))
496 return MCDisassembler::Fail;
501 decodeInstruction(DecoderTableNEONDup32, MI, Insn, Address, this, STI);
502 if (Result != MCDisassembler::Fail) {
504 // Add a fake predicate operand, because we share these instruction
505 // definitions with Thumb2 where these instructions are predicable.
506 if (!DecodePredicateOperand(MI, 0xE, Address, this))
507 return MCDisassembler::Fail;
512 decodeInstruction(DecoderTablev8NEON32, MI, Insn, Address, this, STI);
513 if (Result != MCDisassembler::Fail) {
519 decodeInstruction(DecoderTablev8Crypto32, MI, Insn, Address, this, STI);
520 if (Result != MCDisassembler::Fail) {
526 return MCDisassembler::Fail;
530 extern const MCInstrDesc ARMInsts[];
533 /// tryAddingSymbolicOperand - trys to add a symbolic operand in place of the
534 /// immediate Value in the MCInst. The immediate Value has had any PC
535 /// adjustment made by the caller. If the instruction is a branch instruction
536 /// then isBranch is true, else false. If the getOpInfo() function was set as
537 /// part of the setupForSymbolicDisassembly() call then that function is called
538 /// to get any symbolic information at the Address for this instruction. If
539 /// that returns non-zero then the symbolic information it returns is used to
540 /// create an MCExpr and that is added as an operand to the MCInst. If
541 /// getOpInfo() returns zero and isBranch is true then a symbol look up for
542 /// Value is done and if a symbol is found an MCExpr is created with that, else
543 /// an MCExpr with Value is created. This function returns true if it adds an
544 /// operand to the MCInst and false otherwise.
545 static bool tryAddingSymbolicOperand(uint64_t Address, int32_t Value,
546 bool isBranch, uint64_t InstSize,
547 MCInst &MI, const void *Decoder) {
548 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
549 // FIXME: Does it make sense for value to be negative?
550 return Dis->tryAddingSymbolicOperand(MI, (uint32_t)Value, Address, isBranch,
551 /* Offset */ 0, InstSize);
554 /// tryAddingPcLoadReferenceComment - trys to add a comment as to what is being
555 /// referenced by a load instruction with the base register that is the Pc.
556 /// These can often be values in a literal pool near the Address of the
557 /// instruction. The Address of the instruction and its immediate Value are
558 /// used as a possible literal pool entry. The SymbolLookUp call back will
559 /// return the name of a symbol referenced by the literal pool's entry if
560 /// the referenced address is that of a symbol. Or it will return a pointer to
561 /// a literal 'C' string if the referenced address of the literal pool's entry
562 /// is an address into a section with 'C' string literals.
563 static void tryAddingPcLoadReferenceComment(uint64_t Address, int Value,
564 const void *Decoder) {
565 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
566 Dis->tryAddingPcLoadReferenceComment(Value, Address);
569 // Thumb1 instructions don't have explicit S bits. Rather, they
570 // implicitly set CPSR. Since it's not represented in the encoding, the
571 // auto-generated decoder won't inject the CPSR operand. We need to fix
572 // that as a post-pass.
573 static void AddThumb1SBit(MCInst &MI, bool InITBlock) {
574 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
575 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
576 MCInst::iterator I = MI.begin();
577 for (unsigned i = 0; i < NumOps; ++i, ++I) {
578 if (I == MI.end()) break;
579 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) {
580 if (i > 0 && OpInfo[i-1].isPredicate()) continue;
581 MI.insert(I, MCOperand::createReg(InITBlock ? 0 : ARM::CPSR));
586 MI.insert(I, MCOperand::createReg(InITBlock ? 0 : ARM::CPSR));
589 // Most Thumb instructions don't have explicit predicates in the
590 // encoding, but rather get their predicates from IT context. We need
591 // to fix up the predicate operands using this context information as a
593 MCDisassembler::DecodeStatus
594 ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
595 MCDisassembler::DecodeStatus S = Success;
597 const FeatureBitset &FeatureBits = getSubtargetInfo().getFeatureBits();
599 // A few instructions actually have predicates encoded in them. Don't
600 // try to overwrite it if we're seeing one of those.
601 switch (MI.getOpcode()) {
612 // Some instructions (mostly conditional branches) are not
613 // allowed in IT blocks.
614 if (ITBlock.instrInITBlock())
620 if (MI.getOperand(0).getImm() == 0x10 && (FeatureBits[ARM::FeatureRAS]) != 0)
627 // Some instructions (mostly unconditional branches) can
628 // only appears at the end of, or outside of, an IT.
629 if (ITBlock.instrInITBlock() && !ITBlock.instrLastInITBlock())
636 // If we're in an IT block, base the predicate on that. Otherwise,
637 // assume a predicate of AL.
639 CC = ITBlock.getITCC();
642 if (ITBlock.instrInITBlock())
643 ITBlock.advanceITState();
645 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
646 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
647 MCInst::iterator I = MI.begin();
648 for (unsigned i = 0; i < NumOps; ++i, ++I) {
649 if (I == MI.end()) break;
650 if (OpInfo[i].isPredicate()) {
651 I = MI.insert(I, MCOperand::createImm(CC));
654 MI.insert(I, MCOperand::createReg(0));
656 MI.insert(I, MCOperand::createReg(ARM::CPSR));
661 I = MI.insert(I, MCOperand::createImm(CC));
664 MI.insert(I, MCOperand::createReg(0));
666 MI.insert(I, MCOperand::createReg(ARM::CPSR));
671 // Thumb VFP instructions are a special case. Because we share their
672 // encodings between ARM and Thumb modes, and they are predicable in ARM
673 // mode, the auto-generated decoder will give them an (incorrect)
674 // predicate operand. We need to rewrite these operands based on the IT
675 // context as a post-pass.
676 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
678 CC = ITBlock.getITCC();
679 if (ITBlock.instrInITBlock())
680 ITBlock.advanceITState();
682 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
683 MCInst::iterator I = MI.begin();
684 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
685 for (unsigned i = 0; i < NumOps; ++i, ++I) {
686 if (OpInfo[i].isPredicate() ) {
692 I->setReg(ARM::CPSR);
698 DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
699 ArrayRef<uint8_t> Bytes,
702 raw_ostream &CS) const {
705 assert(STI.getFeatureBits()[ARM::ModeThumb] &&
706 "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!");
708 // We want to read exactly 2 bytes of data.
709 if (Bytes.size() < 2) {
711 return MCDisassembler::Fail;
714 uint16_t Insn16 = (Bytes[1] << 8) | Bytes[0];
715 DecodeStatus Result =
716 decodeInstruction(DecoderTableThumb16, MI, Insn16, Address, this, STI);
717 if (Result != MCDisassembler::Fail) {
719 Check(Result, AddThumbPredicate(MI));
723 Result = decodeInstruction(DecoderTableThumbSBit16, MI, Insn16, Address, this,
727 bool InITBlock = ITBlock.instrInITBlock();
728 Check(Result, AddThumbPredicate(MI));
729 AddThumb1SBit(MI, InITBlock);
734 decodeInstruction(DecoderTableThumb216, MI, Insn16, Address, this, STI);
735 if (Result != MCDisassembler::Fail) {
738 // Nested IT blocks are UNPREDICTABLE. Must be checked before we add
739 // the Thumb predicate.
740 if (MI.getOpcode() == ARM::t2IT && ITBlock.instrInITBlock())
741 Result = MCDisassembler::SoftFail;
743 Check(Result, AddThumbPredicate(MI));
745 // If we find an IT instruction, we need to parse its condition
746 // code and mask operands so that we can apply them correctly
747 // to the subsequent instructions.
748 if (MI.getOpcode() == ARM::t2IT) {
750 unsigned Firstcond = MI.getOperand(0).getImm();
751 unsigned Mask = MI.getOperand(1).getImm();
752 ITBlock.setITState(Firstcond, Mask);
758 // We want to read exactly 4 bytes of data.
759 if (Bytes.size() < 4) {
761 return MCDisassembler::Fail;
765 (Bytes[3] << 8) | (Bytes[2] << 0) | (Bytes[1] << 24) | (Bytes[0] << 16);
767 decodeInstruction(DecoderTableThumb32, MI, Insn32, Address, this, STI);
768 if (Result != MCDisassembler::Fail) {
770 bool InITBlock = ITBlock.instrInITBlock();
771 Check(Result, AddThumbPredicate(MI));
772 AddThumb1SBit(MI, InITBlock);
777 decodeInstruction(DecoderTableThumb232, MI, Insn32, Address, this, STI);
778 if (Result != MCDisassembler::Fail) {
780 Check(Result, AddThumbPredicate(MI));
784 if (fieldFromInstruction(Insn32, 28, 4) == 0xE) {
786 decodeInstruction(DecoderTableVFP32, MI, Insn32, Address, this, STI);
787 if (Result != MCDisassembler::Fail) {
789 UpdateThumbVFPPredicate(MI);
795 decodeInstruction(DecoderTableVFPV832, MI, Insn32, Address, this, STI);
796 if (Result != MCDisassembler::Fail) {
801 if (fieldFromInstruction(Insn32, 28, 4) == 0xE) {
802 Result = decodeInstruction(DecoderTableNEONDup32, MI, Insn32, Address, this,
804 if (Result != MCDisassembler::Fail) {
806 Check(Result, AddThumbPredicate(MI));
811 if (fieldFromInstruction(Insn32, 24, 8) == 0xF9) {
812 uint32_t NEONLdStInsn = Insn32;
813 NEONLdStInsn &= 0xF0FFFFFF;
814 NEONLdStInsn |= 0x04000000;
815 Result = decodeInstruction(DecoderTableNEONLoadStore32, MI, NEONLdStInsn,
817 if (Result != MCDisassembler::Fail) {
819 Check(Result, AddThumbPredicate(MI));
824 if (fieldFromInstruction(Insn32, 24, 4) == 0xF) {
825 uint32_t NEONDataInsn = Insn32;
826 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
827 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
828 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
829 Result = decodeInstruction(DecoderTableNEONData32, MI, NEONDataInsn,
831 if (Result != MCDisassembler::Fail) {
833 Check(Result, AddThumbPredicate(MI));
837 uint32_t NEONCryptoInsn = Insn32;
838 NEONCryptoInsn &= 0xF0FFFFFF; // Clear bits 27-24
839 NEONCryptoInsn |= (NEONCryptoInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
840 NEONCryptoInsn |= 0x12000000; // Set bits 28 and 25
841 Result = decodeInstruction(DecoderTablev8Crypto32, MI, NEONCryptoInsn,
843 if (Result != MCDisassembler::Fail) {
848 uint32_t NEONv8Insn = Insn32;
849 NEONv8Insn &= 0xF3FFFFFF; // Clear bits 27-26
850 Result = decodeInstruction(DecoderTablev8NEON32, MI, NEONv8Insn, Address,
852 if (Result != MCDisassembler::Fail) {
859 return MCDisassembler::Fail;
863 extern "C" void LLVMInitializeARMDisassembler() {
864 TargetRegistry::RegisterMCDisassembler(getTheARMLETarget(),
865 createARMDisassembler);
866 TargetRegistry::RegisterMCDisassembler(getTheARMBETarget(),
867 createARMDisassembler);
868 TargetRegistry::RegisterMCDisassembler(getTheThumbLETarget(),
869 createThumbDisassembler);
870 TargetRegistry::RegisterMCDisassembler(getTheThumbBETarget(),
871 createThumbDisassembler);
874 static const uint16_t GPRDecoderTable[] = {
875 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
876 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
877 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
878 ARM::R12, ARM::SP, ARM::LR, ARM::PC
881 static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
882 uint64_t Address, const void *Decoder) {
884 return MCDisassembler::Fail;
886 unsigned Register = GPRDecoderTable[RegNo];
887 Inst.addOperand(MCOperand::createReg(Register));
888 return MCDisassembler::Success;
892 DecodeGPRnopcRegisterClass(MCInst &Inst, unsigned RegNo,
893 uint64_t Address, const void *Decoder) {
894 DecodeStatus S = MCDisassembler::Success;
897 S = MCDisassembler::SoftFail;
899 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
905 DecodeGPRwithAPSRRegisterClass(MCInst &Inst, unsigned RegNo,
906 uint64_t Address, const void *Decoder) {
907 DecodeStatus S = MCDisassembler::Success;
911 Inst.addOperand(MCOperand::createReg(ARM::APSR_NZCV));
912 return MCDisassembler::Success;
915 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
919 static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
920 uint64_t Address, const void *Decoder) {
922 return MCDisassembler::Fail;
923 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
926 static const uint16_t GPRPairDecoderTable[] = {
927 ARM::R0_R1, ARM::R2_R3, ARM::R4_R5, ARM::R6_R7,
928 ARM::R8_R9, ARM::R10_R11, ARM::R12_SP
931 static DecodeStatus DecodeGPRPairRegisterClass(MCInst &Inst, unsigned RegNo,
932 uint64_t Address, const void *Decoder) {
933 DecodeStatus S = MCDisassembler::Success;
936 return MCDisassembler::Fail;
938 if ((RegNo & 1) || RegNo == 0xe)
939 S = MCDisassembler::SoftFail;
941 unsigned RegisterPair = GPRPairDecoderTable[RegNo/2];
942 Inst.addOperand(MCOperand::createReg(RegisterPair));
946 static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
947 uint64_t Address, const void *Decoder) {
948 unsigned Register = 0;
969 return MCDisassembler::Fail;
972 Inst.addOperand(MCOperand::createReg(Register));
973 return MCDisassembler::Success;
976 static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
977 uint64_t Address, const void *Decoder) {
978 DecodeStatus S = MCDisassembler::Success;
980 const FeatureBitset &featureBits =
981 ((const MCDisassembler*)Decoder)->getSubtargetInfo().getFeatureBits();
983 if ((RegNo == 13 && !featureBits[ARM::HasV8Ops]) || RegNo == 15)
984 S = MCDisassembler::SoftFail;
986 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
990 static const uint16_t SPRDecoderTable[] = {
991 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
992 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
993 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
994 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
995 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
996 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
997 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
998 ARM::S28, ARM::S29, ARM::S30, ARM::S31
1001 static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
1002 uint64_t Address, const void *Decoder) {
1004 return MCDisassembler::Fail;
1006 unsigned Register = SPRDecoderTable[RegNo];
1007 Inst.addOperand(MCOperand::createReg(Register));
1008 return MCDisassembler::Success;
1011 static const uint16_t DPRDecoderTable[] = {
1012 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
1013 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
1014 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
1015 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
1016 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
1017 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
1018 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
1019 ARM::D28, ARM::D29, ARM::D30, ARM::D31
1022 static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
1023 uint64_t Address, const void *Decoder) {
1024 const FeatureBitset &featureBits =
1025 ((const MCDisassembler*)Decoder)->getSubtargetInfo().getFeatureBits();
1027 bool hasD16 = featureBits[ARM::FeatureD16];
1029 if (RegNo > 31 || (hasD16 && RegNo > 15))
1030 return MCDisassembler::Fail;
1032 unsigned Register = DPRDecoderTable[RegNo];
1033 Inst.addOperand(MCOperand::createReg(Register));
1034 return MCDisassembler::Success;
1037 static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
1038 uint64_t Address, const void *Decoder) {
1040 return MCDisassembler::Fail;
1041 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
1045 DecodeDPR_VFP2RegisterClass(MCInst &Inst, unsigned RegNo,
1046 uint64_t Address, const void *Decoder) {
1048 return MCDisassembler::Fail;
1049 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
1052 static const uint16_t QPRDecoderTable[] = {
1053 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
1054 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
1055 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
1056 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
1060 static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
1061 uint64_t Address, const void *Decoder) {
1062 if (RegNo > 31 || (RegNo & 1) != 0)
1063 return MCDisassembler::Fail;
1066 unsigned Register = QPRDecoderTable[RegNo];
1067 Inst.addOperand(MCOperand::createReg(Register));
1068 return MCDisassembler::Success;
1071 static const uint16_t DPairDecoderTable[] = {
1072 ARM::Q0, ARM::D1_D2, ARM::Q1, ARM::D3_D4, ARM::Q2, ARM::D5_D6,
1073 ARM::Q3, ARM::D7_D8, ARM::Q4, ARM::D9_D10, ARM::Q5, ARM::D11_D12,
1074 ARM::Q6, ARM::D13_D14, ARM::Q7, ARM::D15_D16, ARM::Q8, ARM::D17_D18,
1075 ARM::Q9, ARM::D19_D20, ARM::Q10, ARM::D21_D22, ARM::Q11, ARM::D23_D24,
1076 ARM::Q12, ARM::D25_D26, ARM::Q13, ARM::D27_D28, ARM::Q14, ARM::D29_D30,
1080 static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
1081 uint64_t Address, const void *Decoder) {
1083 return MCDisassembler::Fail;
1085 unsigned Register = DPairDecoderTable[RegNo];
1086 Inst.addOperand(MCOperand::createReg(Register));
1087 return MCDisassembler::Success;
1090 static const uint16_t DPairSpacedDecoderTable[] = {
1091 ARM::D0_D2, ARM::D1_D3, ARM::D2_D4, ARM::D3_D5,
1092 ARM::D4_D6, ARM::D5_D7, ARM::D6_D8, ARM::D7_D9,
1093 ARM::D8_D10, ARM::D9_D11, ARM::D10_D12, ARM::D11_D13,
1094 ARM::D12_D14, ARM::D13_D15, ARM::D14_D16, ARM::D15_D17,
1095 ARM::D16_D18, ARM::D17_D19, ARM::D18_D20, ARM::D19_D21,
1096 ARM::D20_D22, ARM::D21_D23, ARM::D22_D24, ARM::D23_D25,
1097 ARM::D24_D26, ARM::D25_D27, ARM::D26_D28, ARM::D27_D29,
1098 ARM::D28_D30, ARM::D29_D31
1101 static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
1104 const void *Decoder) {
1106 return MCDisassembler::Fail;
1108 unsigned Register = DPairSpacedDecoderTable[RegNo];
1109 Inst.addOperand(MCOperand::createReg(Register));
1110 return MCDisassembler::Success;
1113 static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
1114 uint64_t Address, const void *Decoder) {
1115 if (Val == 0xF) return MCDisassembler::Fail;
1116 // AL predicate is not allowed on Thumb1 branches.
1117 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
1118 return MCDisassembler::Fail;
1119 Inst.addOperand(MCOperand::createImm(Val));
1120 if (Val == ARMCC::AL) {
1121 Inst.addOperand(MCOperand::createReg(0));
1123 Inst.addOperand(MCOperand::createReg(ARM::CPSR));
1124 return MCDisassembler::Success;
1127 static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
1128 uint64_t Address, const void *Decoder) {
1130 Inst.addOperand(MCOperand::createReg(ARM::CPSR));
1132 Inst.addOperand(MCOperand::createReg(0));
1133 return MCDisassembler::Success;
1136 static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Val,
1137 uint64_t Address, const void *Decoder) {
1138 DecodeStatus S = MCDisassembler::Success;
1140 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1141 unsigned type = fieldFromInstruction(Val, 5, 2);
1142 unsigned imm = fieldFromInstruction(Val, 7, 5);
1144 // Register-immediate
1145 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
1146 return MCDisassembler::Fail;
1148 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1151 Shift = ARM_AM::lsl;
1154 Shift = ARM_AM::lsr;
1157 Shift = ARM_AM::asr;
1160 Shift = ARM_AM::ror;
1164 if (Shift == ARM_AM::ror && imm == 0)
1165 Shift = ARM_AM::rrx;
1167 unsigned Op = Shift | (imm << 3);
1168 Inst.addOperand(MCOperand::createImm(Op));
1173 static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Val,
1174 uint64_t Address, const void *Decoder) {
1175 DecodeStatus S = MCDisassembler::Success;
1177 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1178 unsigned type = fieldFromInstruction(Val, 5, 2);
1179 unsigned Rs = fieldFromInstruction(Val, 8, 4);
1181 // Register-register
1182 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1183 return MCDisassembler::Fail;
1184 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)))
1185 return MCDisassembler::Fail;
1187 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1190 Shift = ARM_AM::lsl;
1193 Shift = ARM_AM::lsr;
1196 Shift = ARM_AM::asr;
1199 Shift = ARM_AM::ror;
1203 Inst.addOperand(MCOperand::createImm(Shift));
1208 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
1209 uint64_t Address, const void *Decoder) {
1210 DecodeStatus S = MCDisassembler::Success;
1212 bool NeedDisjointWriteback = false;
1213 unsigned WritebackReg = 0;
1214 switch (Inst.getOpcode()) {
1217 case ARM::LDMIA_UPD:
1218 case ARM::LDMDB_UPD:
1219 case ARM::LDMIB_UPD:
1220 case ARM::LDMDA_UPD:
1221 case ARM::t2LDMIA_UPD:
1222 case ARM::t2LDMDB_UPD:
1223 case ARM::t2STMIA_UPD:
1224 case ARM::t2STMDB_UPD:
1225 NeedDisjointWriteback = true;
1226 WritebackReg = Inst.getOperand(0).getReg();
1230 // Empty register lists are not allowed.
1231 if (Val == 0) return MCDisassembler::Fail;
1232 for (unsigned i = 0; i < 16; ++i) {
1233 if (Val & (1 << i)) {
1234 if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder)))
1235 return MCDisassembler::Fail;
1236 // Writeback not allowed if Rn is in the target list.
1237 if (NeedDisjointWriteback && WritebackReg == Inst.end()[-1].getReg())
1238 Check(S, MCDisassembler::SoftFail);
1245 static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
1246 uint64_t Address, const void *Decoder) {
1247 DecodeStatus S = MCDisassembler::Success;
1249 unsigned Vd = fieldFromInstruction(Val, 8, 5);
1250 unsigned regs = fieldFromInstruction(Val, 0, 8);
1252 // In case of unpredictable encoding, tweak the operands.
1253 if (regs == 0 || (Vd + regs) > 32) {
1254 regs = Vd + regs > 32 ? 32 - Vd : regs;
1255 regs = std::max( 1u, regs);
1256 S = MCDisassembler::SoftFail;
1259 if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
1260 return MCDisassembler::Fail;
1261 for (unsigned i = 0; i < (regs - 1); ++i) {
1262 if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1263 return MCDisassembler::Fail;
1269 static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
1270 uint64_t Address, const void *Decoder) {
1271 DecodeStatus S = MCDisassembler::Success;
1273 unsigned Vd = fieldFromInstruction(Val, 8, 5);
1274 unsigned regs = fieldFromInstruction(Val, 1, 7);
1276 // In case of unpredictable encoding, tweak the operands.
1277 if (regs == 0 || regs > 16 || (Vd + regs) > 32) {
1278 regs = Vd + regs > 32 ? 32 - Vd : regs;
1279 regs = std::max( 1u, regs);
1280 regs = std::min(16u, regs);
1281 S = MCDisassembler::SoftFail;
1284 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
1285 return MCDisassembler::Fail;
1286 for (unsigned i = 0; i < (regs - 1); ++i) {
1287 if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1288 return MCDisassembler::Fail;
1294 static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Val,
1295 uint64_t Address, const void *Decoder) {
1296 // This operand encodes a mask of contiguous zeros between a specified MSB
1297 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
1298 // the mask of all bits LSB-and-lower, and then xor them to create
1299 // the mask of that's all ones on [msb, lsb]. Finally we not it to
1300 // create the final mask.
1301 unsigned msb = fieldFromInstruction(Val, 5, 5);
1302 unsigned lsb = fieldFromInstruction(Val, 0, 5);
1304 DecodeStatus S = MCDisassembler::Success;
1306 Check(S, MCDisassembler::SoftFail);
1307 // The check above will cause the warning for the "potentially undefined
1308 // instruction encoding" but we can't build a bad MCOperand value here
1309 // with a lsb > msb or else printing the MCInst will cause a crash.
1313 uint32_t msb_mask = 0xFFFFFFFF;
1314 if (msb != 31) msb_mask = (1U << (msb+1)) - 1;
1315 uint32_t lsb_mask = (1U << lsb) - 1;
1317 Inst.addOperand(MCOperand::createImm(~(msb_mask ^ lsb_mask)));
1321 static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
1322 uint64_t Address, const void *Decoder) {
1323 DecodeStatus S = MCDisassembler::Success;
1325 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1326 unsigned CRd = fieldFromInstruction(Insn, 12, 4);
1327 unsigned coproc = fieldFromInstruction(Insn, 8, 4);
1328 unsigned imm = fieldFromInstruction(Insn, 0, 8);
1329 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1330 unsigned U = fieldFromInstruction(Insn, 23, 1);
1332 switch (Inst.getOpcode()) {
1333 case ARM::LDC_OFFSET:
1336 case ARM::LDC_OPTION:
1337 case ARM::LDCL_OFFSET:
1339 case ARM::LDCL_POST:
1340 case ARM::LDCL_OPTION:
1341 case ARM::STC_OFFSET:
1344 case ARM::STC_OPTION:
1345 case ARM::STCL_OFFSET:
1347 case ARM::STCL_POST:
1348 case ARM::STCL_OPTION:
1349 case ARM::t2LDC_OFFSET:
1350 case ARM::t2LDC_PRE:
1351 case ARM::t2LDC_POST:
1352 case ARM::t2LDC_OPTION:
1353 case ARM::t2LDCL_OFFSET:
1354 case ARM::t2LDCL_PRE:
1355 case ARM::t2LDCL_POST:
1356 case ARM::t2LDCL_OPTION:
1357 case ARM::t2STC_OFFSET:
1358 case ARM::t2STC_PRE:
1359 case ARM::t2STC_POST:
1360 case ARM::t2STC_OPTION:
1361 case ARM::t2STCL_OFFSET:
1362 case ARM::t2STCL_PRE:
1363 case ARM::t2STCL_POST:
1364 case ARM::t2STCL_OPTION:
1365 if (coproc == 0xA || coproc == 0xB)
1366 return MCDisassembler::Fail;
1372 const FeatureBitset &featureBits =
1373 ((const MCDisassembler*)Decoder)->getSubtargetInfo().getFeatureBits();
1374 if (featureBits[ARM::HasV8Ops] && (coproc != 14))
1375 return MCDisassembler::Fail;
1377 Inst.addOperand(MCOperand::createImm(coproc));
1378 Inst.addOperand(MCOperand::createImm(CRd));
1379 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1380 return MCDisassembler::Fail;
1382 switch (Inst.getOpcode()) {
1383 case ARM::t2LDC2_OFFSET:
1384 case ARM::t2LDC2L_OFFSET:
1385 case ARM::t2LDC2_PRE:
1386 case ARM::t2LDC2L_PRE:
1387 case ARM::t2STC2_OFFSET:
1388 case ARM::t2STC2L_OFFSET:
1389 case ARM::t2STC2_PRE:
1390 case ARM::t2STC2L_PRE:
1391 case ARM::LDC2_OFFSET:
1392 case ARM::LDC2L_OFFSET:
1394 case ARM::LDC2L_PRE:
1395 case ARM::STC2_OFFSET:
1396 case ARM::STC2L_OFFSET:
1398 case ARM::STC2L_PRE:
1399 case ARM::t2LDC_OFFSET:
1400 case ARM::t2LDCL_OFFSET:
1401 case ARM::t2LDC_PRE:
1402 case ARM::t2LDCL_PRE:
1403 case ARM::t2STC_OFFSET:
1404 case ARM::t2STCL_OFFSET:
1405 case ARM::t2STC_PRE:
1406 case ARM::t2STCL_PRE:
1407 case ARM::LDC_OFFSET:
1408 case ARM::LDCL_OFFSET:
1411 case ARM::STC_OFFSET:
1412 case ARM::STCL_OFFSET:
1415 imm = ARM_AM::getAM5Opc(U ? ARM_AM::add : ARM_AM::sub, imm);
1416 Inst.addOperand(MCOperand::createImm(imm));
1418 case ARM::t2LDC2_POST:
1419 case ARM::t2LDC2L_POST:
1420 case ARM::t2STC2_POST:
1421 case ARM::t2STC2L_POST:
1422 case ARM::LDC2_POST:
1423 case ARM::LDC2L_POST:
1424 case ARM::STC2_POST:
1425 case ARM::STC2L_POST:
1426 case ARM::t2LDC_POST:
1427 case ARM::t2LDCL_POST:
1428 case ARM::t2STC_POST:
1429 case ARM::t2STCL_POST:
1431 case ARM::LDCL_POST:
1433 case ARM::STCL_POST:
1437 // The 'option' variant doesn't encode 'U' in the immediate since
1438 // the immediate is unsigned [0,255].
1439 Inst.addOperand(MCOperand::createImm(imm));
1443 switch (Inst.getOpcode()) {
1444 case ARM::LDC_OFFSET:
1447 case ARM::LDC_OPTION:
1448 case ARM::LDCL_OFFSET:
1450 case ARM::LDCL_POST:
1451 case ARM::LDCL_OPTION:
1452 case ARM::STC_OFFSET:
1455 case ARM::STC_OPTION:
1456 case ARM::STCL_OFFSET:
1458 case ARM::STCL_POST:
1459 case ARM::STCL_OPTION:
1460 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1461 return MCDisassembler::Fail;
1471 DecodeAddrMode2IdxInstruction(MCInst &Inst, unsigned Insn,
1472 uint64_t Address, const void *Decoder) {
1473 DecodeStatus S = MCDisassembler::Success;
1475 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1476 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1477 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1478 unsigned imm = fieldFromInstruction(Insn, 0, 12);
1479 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1480 unsigned reg = fieldFromInstruction(Insn, 25, 1);
1481 unsigned P = fieldFromInstruction(Insn, 24, 1);
1482 unsigned W = fieldFromInstruction(Insn, 21, 1);
1484 // On stores, the writeback operand precedes Rt.
1485 switch (Inst.getOpcode()) {
1486 case ARM::STR_POST_IMM:
1487 case ARM::STR_POST_REG:
1488 case ARM::STRB_POST_IMM:
1489 case ARM::STRB_POST_REG:
1490 case ARM::STRT_POST_REG:
1491 case ARM::STRT_POST_IMM:
1492 case ARM::STRBT_POST_REG:
1493 case ARM::STRBT_POST_IMM:
1494 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1495 return MCDisassembler::Fail;
1501 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1502 return MCDisassembler::Fail;
1504 // On loads, the writeback operand comes after Rt.
1505 switch (Inst.getOpcode()) {
1506 case ARM::LDR_POST_IMM:
1507 case ARM::LDR_POST_REG:
1508 case ARM::LDRB_POST_IMM:
1509 case ARM::LDRB_POST_REG:
1510 case ARM::LDRBT_POST_REG:
1511 case ARM::LDRBT_POST_IMM:
1512 case ARM::LDRT_POST_REG:
1513 case ARM::LDRT_POST_IMM:
1514 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1515 return MCDisassembler::Fail;
1521 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1522 return MCDisassembler::Fail;
1524 ARM_AM::AddrOpc Op = ARM_AM::add;
1525 if (!fieldFromInstruction(Insn, 23, 1))
1528 bool writeback = (P == 0) || (W == 1);
1529 unsigned idx_mode = 0;
1531 idx_mode = ARMII::IndexModePre;
1532 else if (!P && writeback)
1533 idx_mode = ARMII::IndexModePost;
1535 if (writeback && (Rn == 15 || Rn == Rt))
1536 S = MCDisassembler::SoftFail; // UNPREDICTABLE
1539 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1540 return MCDisassembler::Fail;
1541 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1542 switch( fieldFromInstruction(Insn, 5, 2)) {
1556 return MCDisassembler::Fail;
1558 unsigned amt = fieldFromInstruction(Insn, 7, 5);
1559 if (Opc == ARM_AM::ror && amt == 0)
1561 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1563 Inst.addOperand(MCOperand::createImm(imm));
1565 Inst.addOperand(MCOperand::createReg(0));
1566 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1567 Inst.addOperand(MCOperand::createImm(tmp));
1570 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1571 return MCDisassembler::Fail;
1576 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Val,
1577 uint64_t Address, const void *Decoder) {
1578 DecodeStatus S = MCDisassembler::Success;
1580 unsigned Rn = fieldFromInstruction(Val, 13, 4);
1581 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1582 unsigned type = fieldFromInstruction(Val, 5, 2);
1583 unsigned imm = fieldFromInstruction(Val, 7, 5);
1584 unsigned U = fieldFromInstruction(Val, 12, 1);
1586 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1602 if (ShOp == ARM_AM::ror && imm == 0)
1605 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1606 return MCDisassembler::Fail;
1607 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1608 return MCDisassembler::Fail;
1611 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1613 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1614 Inst.addOperand(MCOperand::createImm(shift));
1620 DecodeAddrMode3Instruction(MCInst &Inst, unsigned Insn,
1621 uint64_t Address, const void *Decoder) {
1622 DecodeStatus S = MCDisassembler::Success;
1624 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1625 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1626 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1627 unsigned type = fieldFromInstruction(Insn, 22, 1);
1628 unsigned imm = fieldFromInstruction(Insn, 8, 4);
1629 unsigned U = ((~fieldFromInstruction(Insn, 23, 1)) & 1) << 8;
1630 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1631 unsigned W = fieldFromInstruction(Insn, 21, 1);
1632 unsigned P = fieldFromInstruction(Insn, 24, 1);
1633 unsigned Rt2 = Rt + 1;
1635 bool writeback = (W == 1) | (P == 0);
1637 // For {LD,ST}RD, Rt must be even, else undefined.
1638 switch (Inst.getOpcode()) {
1641 case ARM::STRD_POST:
1644 case ARM::LDRD_POST:
1645 if (Rt & 0x1) S = MCDisassembler::SoftFail;
1650 switch (Inst.getOpcode()) {
1653 case ARM::STRD_POST:
1654 if (P == 0 && W == 1)
1655 S = MCDisassembler::SoftFail;
1657 if (writeback && (Rn == 15 || Rn == Rt || Rn == Rt2))
1658 S = MCDisassembler::SoftFail;
1659 if (type && Rm == 15)
1660 S = MCDisassembler::SoftFail;
1662 S = MCDisassembler::SoftFail;
1663 if (!type && fieldFromInstruction(Insn, 8, 4))
1664 S = MCDisassembler::SoftFail;
1668 case ARM::STRH_POST:
1670 S = MCDisassembler::SoftFail;
1671 if (writeback && (Rn == 15 || Rn == Rt))
1672 S = MCDisassembler::SoftFail;
1673 if (!type && Rm == 15)
1674 S = MCDisassembler::SoftFail;
1678 case ARM::LDRD_POST:
1679 if (type && Rn == 15){
1681 S = MCDisassembler::SoftFail;
1684 if (P == 0 && W == 1)
1685 S = MCDisassembler::SoftFail;
1686 if (!type && (Rt2 == 15 || Rm == 15 || Rm == Rt || Rm == Rt2))
1687 S = MCDisassembler::SoftFail;
1688 if (!type && writeback && Rn == 15)
1689 S = MCDisassembler::SoftFail;
1690 if (writeback && (Rn == Rt || Rn == Rt2))
1691 S = MCDisassembler::SoftFail;
1695 case ARM::LDRH_POST:
1696 if (type && Rn == 15){
1698 S = MCDisassembler::SoftFail;
1702 S = MCDisassembler::SoftFail;
1703 if (!type && Rm == 15)
1704 S = MCDisassembler::SoftFail;
1705 if (!type && writeback && (Rn == 15 || Rn == Rt))
1706 S = MCDisassembler::SoftFail;
1709 case ARM::LDRSH_PRE:
1710 case ARM::LDRSH_POST:
1712 case ARM::LDRSB_PRE:
1713 case ARM::LDRSB_POST:
1714 if (type && Rn == 15){
1716 S = MCDisassembler::SoftFail;
1719 if (type && (Rt == 15 || (writeback && Rn == Rt)))
1720 S = MCDisassembler::SoftFail;
1721 if (!type && (Rt == 15 || Rm == 15))
1722 S = MCDisassembler::SoftFail;
1723 if (!type && writeback && (Rn == 15 || Rn == Rt))
1724 S = MCDisassembler::SoftFail;
1730 if (writeback) { // Writeback
1732 U |= ARMII::IndexModePre << 9;
1734 U |= ARMII::IndexModePost << 9;
1736 // On stores, the writeback operand precedes Rt.
1737 switch (Inst.getOpcode()) {
1740 case ARM::STRD_POST:
1743 case ARM::STRH_POST:
1744 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1745 return MCDisassembler::Fail;
1752 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1753 return MCDisassembler::Fail;
1754 switch (Inst.getOpcode()) {
1757 case ARM::STRD_POST:
1760 case ARM::LDRD_POST:
1761 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
1762 return MCDisassembler::Fail;
1769 // On loads, the writeback operand comes after Rt.
1770 switch (Inst.getOpcode()) {
1773 case ARM::LDRD_POST:
1776 case ARM::LDRH_POST:
1778 case ARM::LDRSH_PRE:
1779 case ARM::LDRSH_POST:
1781 case ARM::LDRSB_PRE:
1782 case ARM::LDRSB_POST:
1785 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1786 return MCDisassembler::Fail;
1793 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1794 return MCDisassembler::Fail;
1797 Inst.addOperand(MCOperand::createReg(0));
1798 Inst.addOperand(MCOperand::createImm(U | (imm << 4) | Rm));
1800 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1801 return MCDisassembler::Fail;
1802 Inst.addOperand(MCOperand::createImm(U));
1805 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1806 return MCDisassembler::Fail;
1811 static DecodeStatus DecodeRFEInstruction(MCInst &Inst, unsigned Insn,
1812 uint64_t Address, const void *Decoder) {
1813 DecodeStatus S = MCDisassembler::Success;
1815 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1816 unsigned mode = fieldFromInstruction(Insn, 23, 2);
1833 Inst.addOperand(MCOperand::createImm(mode));
1834 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1835 return MCDisassembler::Fail;
1840 static DecodeStatus DecodeQADDInstruction(MCInst &Inst, unsigned Insn,
1841 uint64_t Address, const void *Decoder) {
1842 DecodeStatus S = MCDisassembler::Success;
1844 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
1845 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1846 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1847 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1850 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
1852 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1853 return MCDisassembler::Fail;
1854 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1855 return MCDisassembler::Fail;
1856 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
1857 return MCDisassembler::Fail;
1858 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1859 return MCDisassembler::Fail;
1863 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst &Inst,
1865 uint64_t Address, const void *Decoder) {
1866 DecodeStatus S = MCDisassembler::Success;
1868 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1869 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1870 unsigned reglist = fieldFromInstruction(Insn, 0, 16);
1873 // Ambiguous with RFE and SRS
1874 switch (Inst.getOpcode()) {
1876 Inst.setOpcode(ARM::RFEDA);
1878 case ARM::LDMDA_UPD:
1879 Inst.setOpcode(ARM::RFEDA_UPD);
1882 Inst.setOpcode(ARM::RFEDB);
1884 case ARM::LDMDB_UPD:
1885 Inst.setOpcode(ARM::RFEDB_UPD);
1888 Inst.setOpcode(ARM::RFEIA);
1890 case ARM::LDMIA_UPD:
1891 Inst.setOpcode(ARM::RFEIA_UPD);
1894 Inst.setOpcode(ARM::RFEIB);
1896 case ARM::LDMIB_UPD:
1897 Inst.setOpcode(ARM::RFEIB_UPD);
1900 Inst.setOpcode(ARM::SRSDA);
1902 case ARM::STMDA_UPD:
1903 Inst.setOpcode(ARM::SRSDA_UPD);
1906 Inst.setOpcode(ARM::SRSDB);
1908 case ARM::STMDB_UPD:
1909 Inst.setOpcode(ARM::SRSDB_UPD);
1912 Inst.setOpcode(ARM::SRSIA);
1914 case ARM::STMIA_UPD:
1915 Inst.setOpcode(ARM::SRSIA_UPD);
1918 Inst.setOpcode(ARM::SRSIB);
1920 case ARM::STMIB_UPD:
1921 Inst.setOpcode(ARM::SRSIB_UPD);
1924 return MCDisassembler::Fail;
1927 // For stores (which become SRS's, the only operand is the mode.
1928 if (fieldFromInstruction(Insn, 20, 1) == 0) {
1929 // Check SRS encoding constraints
1930 if (!(fieldFromInstruction(Insn, 22, 1) == 1 &&
1931 fieldFromInstruction(Insn, 20, 1) == 0))
1932 return MCDisassembler::Fail;
1935 MCOperand::createImm(fieldFromInstruction(Insn, 0, 4)));
1939 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1942 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1943 return MCDisassembler::Fail;
1944 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1945 return MCDisassembler::Fail; // Tied
1946 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1947 return MCDisassembler::Fail;
1948 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
1949 return MCDisassembler::Fail;
1954 // Check for UNPREDICTABLE predicated ESB instruction
1955 static DecodeStatus DecodeHINTInstruction(MCInst &Inst, unsigned Insn,
1956 uint64_t Address, const void *Decoder) {
1957 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1958 unsigned imm8 = fieldFromInstruction(Insn, 0, 8);
1959 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
1960 const FeatureBitset &FeatureBits = Dis->getSubtargetInfo().getFeatureBits();
1962 DecodeStatus S = MCDisassembler::Success;
1964 Inst.addOperand(MCOperand::createImm(imm8));
1966 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1967 return MCDisassembler::Fail;
1969 // ESB is unpredictable if pred != AL. Without the RAS extension, it is a NOP,
1970 // so all predicates should be allowed.
1971 if (imm8 == 0x10 && pred != 0xe && ((FeatureBits[ARM::FeatureRAS]) != 0))
1972 S = MCDisassembler::SoftFail;
1977 static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
1978 uint64_t Address, const void *Decoder) {
1979 unsigned imod = fieldFromInstruction(Insn, 18, 2);
1980 unsigned M = fieldFromInstruction(Insn, 17, 1);
1981 unsigned iflags = fieldFromInstruction(Insn, 6, 3);
1982 unsigned mode = fieldFromInstruction(Insn, 0, 5);
1984 DecodeStatus S = MCDisassembler::Success;
1986 // This decoder is called from multiple location that do not check
1987 // the full encoding is valid before they do.
1988 if (fieldFromInstruction(Insn, 5, 1) != 0 ||
1989 fieldFromInstruction(Insn, 16, 1) != 0 ||
1990 fieldFromInstruction(Insn, 20, 8) != 0x10)
1991 return MCDisassembler::Fail;
1993 // imod == '01' --> UNPREDICTABLE
1994 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1995 // return failure here. The '01' imod value is unprintable, so there's
1996 // nothing useful we could do even if we returned UNPREDICTABLE.
1998 if (imod == 1) return MCDisassembler::Fail;
2001 Inst.setOpcode(ARM::CPS3p);
2002 Inst.addOperand(MCOperand::createImm(imod));
2003 Inst.addOperand(MCOperand::createImm(iflags));
2004 Inst.addOperand(MCOperand::createImm(mode));
2005 } else if (imod && !M) {
2006 Inst.setOpcode(ARM::CPS2p);
2007 Inst.addOperand(MCOperand::createImm(imod));
2008 Inst.addOperand(MCOperand::createImm(iflags));
2009 if (mode) S = MCDisassembler::SoftFail;
2010 } else if (!imod && M) {
2011 Inst.setOpcode(ARM::CPS1p);
2012 Inst.addOperand(MCOperand::createImm(mode));
2013 if (iflags) S = MCDisassembler::SoftFail;
2015 // imod == '00' && M == '0' --> UNPREDICTABLE
2016 Inst.setOpcode(ARM::CPS1p);
2017 Inst.addOperand(MCOperand::createImm(mode));
2018 S = MCDisassembler::SoftFail;
2024 static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
2025 uint64_t Address, const void *Decoder) {
2026 unsigned imod = fieldFromInstruction(Insn, 9, 2);
2027 unsigned M = fieldFromInstruction(Insn, 8, 1);
2028 unsigned iflags = fieldFromInstruction(Insn, 5, 3);
2029 unsigned mode = fieldFromInstruction(Insn, 0, 5);
2031 DecodeStatus S = MCDisassembler::Success;
2033 // imod == '01' --> UNPREDICTABLE
2034 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
2035 // return failure here. The '01' imod value is unprintable, so there's
2036 // nothing useful we could do even if we returned UNPREDICTABLE.
2038 if (imod == 1) return MCDisassembler::Fail;
2041 Inst.setOpcode(ARM::t2CPS3p);
2042 Inst.addOperand(MCOperand::createImm(imod));
2043 Inst.addOperand(MCOperand::createImm(iflags));
2044 Inst.addOperand(MCOperand::createImm(mode));
2045 } else if (imod && !M) {
2046 Inst.setOpcode(ARM::t2CPS2p);
2047 Inst.addOperand(MCOperand::createImm(imod));
2048 Inst.addOperand(MCOperand::createImm(iflags));
2049 if (mode) S = MCDisassembler::SoftFail;
2050 } else if (!imod && M) {
2051 Inst.setOpcode(ARM::t2CPS1p);
2052 Inst.addOperand(MCOperand::createImm(mode));
2053 if (iflags) S = MCDisassembler::SoftFail;
2055 // imod == '00' && M == '0' --> this is a HINT instruction
2056 int imm = fieldFromInstruction(Insn, 0, 8);
2057 // HINT are defined only for immediate in [0..4]
2058 if(imm > 4) return MCDisassembler::Fail;
2059 Inst.setOpcode(ARM::t2HINT);
2060 Inst.addOperand(MCOperand::createImm(imm));
2066 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
2067 uint64_t Address, const void *Decoder) {
2068 DecodeStatus S = MCDisassembler::Success;
2070 unsigned Rd = fieldFromInstruction(Insn, 8, 4);
2073 imm |= (fieldFromInstruction(Insn, 0, 8) << 0);
2074 imm |= (fieldFromInstruction(Insn, 12, 3) << 8);
2075 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
2076 imm |= (fieldFromInstruction(Insn, 26, 1) << 11);
2078 if (Inst.getOpcode() == ARM::t2MOVTi16)
2079 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
2080 return MCDisassembler::Fail;
2081 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
2082 return MCDisassembler::Fail;
2084 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
2085 Inst.addOperand(MCOperand::createImm(imm));
2090 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
2091 uint64_t Address, const void *Decoder) {
2092 DecodeStatus S = MCDisassembler::Success;
2094 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2095 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2098 imm |= (fieldFromInstruction(Insn, 0, 12) << 0);
2099 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
2101 if (Inst.getOpcode() == ARM::MOVTi16)
2102 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2103 return MCDisassembler::Fail;
2105 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2106 return MCDisassembler::Fail;
2108 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
2109 Inst.addOperand(MCOperand::createImm(imm));
2111 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2112 return MCDisassembler::Fail;
2117 static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
2118 uint64_t Address, const void *Decoder) {
2119 DecodeStatus S = MCDisassembler::Success;
2121 unsigned Rd = fieldFromInstruction(Insn, 16, 4);
2122 unsigned Rn = fieldFromInstruction(Insn, 0, 4);
2123 unsigned Rm = fieldFromInstruction(Insn, 8, 4);
2124 unsigned Ra = fieldFromInstruction(Insn, 12, 4);
2125 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2128 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
2130 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2131 return MCDisassembler::Fail;
2132 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
2133 return MCDisassembler::Fail;
2134 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
2135 return MCDisassembler::Fail;
2136 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
2137 return MCDisassembler::Fail;
2139 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2140 return MCDisassembler::Fail;
2145 static DecodeStatus DecodeTSTInstruction(MCInst &Inst, unsigned Insn,
2146 uint64_t Address, const void *Decoder) {
2147 DecodeStatus S = MCDisassembler::Success;
2149 unsigned Pred = fieldFromInstruction(Insn, 28, 4);
2150 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2151 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2154 return DecodeSETPANInstruction(Inst, Insn, Address, Decoder);
2156 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2157 return MCDisassembler::Fail;
2158 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2159 return MCDisassembler::Fail;
2160 if (!Check(S, DecodePredicateOperand(Inst, Pred, Address, Decoder)))
2161 return MCDisassembler::Fail;
2166 static DecodeStatus DecodeSETPANInstruction(MCInst &Inst, unsigned Insn,
2167 uint64_t Address, const void *Decoder) {
2168 DecodeStatus S = MCDisassembler::Success;
2170 unsigned Imm = fieldFromInstruction(Insn, 9, 1);
2172 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
2173 const FeatureBitset &FeatureBits = Dis->getSubtargetInfo().getFeatureBits();
2175 if (!FeatureBits[ARM::HasV8_1aOps] ||
2176 !FeatureBits[ARM::HasV8Ops])
2177 return MCDisassembler::Fail;
2179 // Decoder can be called from DecodeTST, which does not check the full
2180 // encoding is valid.
2181 if (fieldFromInstruction(Insn, 20,12) != 0xf11 ||
2182 fieldFromInstruction(Insn, 4,4) != 0)
2183 return MCDisassembler::Fail;
2184 if (fieldFromInstruction(Insn, 10,10) != 0 ||
2185 fieldFromInstruction(Insn, 0,4) != 0)
2186 S = MCDisassembler::SoftFail;
2188 Inst.setOpcode(ARM::SETPAN);
2189 Inst.addOperand(MCOperand::createImm(Imm));
2194 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
2195 uint64_t Address, const void *Decoder) {
2196 DecodeStatus S = MCDisassembler::Success;
2198 unsigned add = fieldFromInstruction(Val, 12, 1);
2199 unsigned imm = fieldFromInstruction(Val, 0, 12);
2200 unsigned Rn = fieldFromInstruction(Val, 13, 4);
2202 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2203 return MCDisassembler::Fail;
2205 if (!add) imm *= -1;
2206 if (imm == 0 && !add) imm = INT32_MIN;
2207 Inst.addOperand(MCOperand::createImm(imm));
2209 tryAddingPcLoadReferenceComment(Address, Address + imm + 8, Decoder);
2214 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
2215 uint64_t Address, const void *Decoder) {
2216 DecodeStatus S = MCDisassembler::Success;
2218 unsigned Rn = fieldFromInstruction(Val, 9, 4);
2219 // U == 1 to add imm, 0 to subtract it.
2220 unsigned U = fieldFromInstruction(Val, 8, 1);
2221 unsigned imm = fieldFromInstruction(Val, 0, 8);
2223 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2224 return MCDisassembler::Fail;
2227 Inst.addOperand(MCOperand::createImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
2229 Inst.addOperand(MCOperand::createImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
2234 static DecodeStatus DecodeAddrMode5FP16Operand(MCInst &Inst, unsigned Val,
2235 uint64_t Address, const void *Decoder) {
2236 DecodeStatus S = MCDisassembler::Success;
2238 unsigned Rn = fieldFromInstruction(Val, 9, 4);
2239 // U == 1 to add imm, 0 to subtract it.
2240 unsigned U = fieldFromInstruction(Val, 8, 1);
2241 unsigned imm = fieldFromInstruction(Val, 0, 8);
2243 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2244 return MCDisassembler::Fail;
2247 Inst.addOperand(MCOperand::createImm(ARM_AM::getAM5FP16Opc(ARM_AM::add, imm)));
2249 Inst.addOperand(MCOperand::createImm(ARM_AM::getAM5FP16Opc(ARM_AM::sub, imm)));
2254 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
2255 uint64_t Address, const void *Decoder) {
2256 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
2260 DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
2261 uint64_t Address, const void *Decoder) {
2262 DecodeStatus Status = MCDisassembler::Success;
2264 // Note the J1 and J2 values are from the encoded instruction. So here
2265 // change them to I1 and I2 values via as documented:
2266 // I1 = NOT(J1 EOR S);
2267 // I2 = NOT(J2 EOR S);
2268 // and build the imm32 with one trailing zero as documented:
2269 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
2270 unsigned S = fieldFromInstruction(Insn, 26, 1);
2271 unsigned J1 = fieldFromInstruction(Insn, 13, 1);
2272 unsigned J2 = fieldFromInstruction(Insn, 11, 1);
2273 unsigned I1 = !(J1 ^ S);
2274 unsigned I2 = !(J2 ^ S);
2275 unsigned imm10 = fieldFromInstruction(Insn, 16, 10);
2276 unsigned imm11 = fieldFromInstruction(Insn, 0, 11);
2277 unsigned tmp = (S << 23) | (I1 << 22) | (I2 << 21) | (imm10 << 11) | imm11;
2278 int imm32 = SignExtend32<25>(tmp << 1);
2279 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
2280 true, 4, Inst, Decoder))
2281 Inst.addOperand(MCOperand::createImm(imm32));
2287 DecodeBranchImmInstruction(MCInst &Inst, unsigned Insn,
2288 uint64_t Address, const void *Decoder) {
2289 DecodeStatus S = MCDisassembler::Success;
2291 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2292 unsigned imm = fieldFromInstruction(Insn, 0, 24) << 2;
2295 Inst.setOpcode(ARM::BLXi);
2296 imm |= fieldFromInstruction(Insn, 24, 1) << 1;
2297 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2298 true, 4, Inst, Decoder))
2299 Inst.addOperand(MCOperand::createImm(SignExtend32<26>(imm)));
2303 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2304 true, 4, Inst, Decoder))
2305 Inst.addOperand(MCOperand::createImm(SignExtend32<26>(imm)));
2306 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2307 return MCDisassembler::Fail;
2313 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
2314 uint64_t Address, const void *Decoder) {
2315 DecodeStatus S = MCDisassembler::Success;
2317 unsigned Rm = fieldFromInstruction(Val, 0, 4);
2318 unsigned align = fieldFromInstruction(Val, 4, 2);
2320 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2321 return MCDisassembler::Fail;
2323 Inst.addOperand(MCOperand::createImm(0));
2325 Inst.addOperand(MCOperand::createImm(4 << align));
2330 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Insn,
2331 uint64_t Address, const void *Decoder) {
2332 DecodeStatus S = MCDisassembler::Success;
2334 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2335 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2336 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2337 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2338 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2339 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2341 // First output register
2342 switch (Inst.getOpcode()) {
2343 case ARM::VLD1q16: case ARM::VLD1q32: case ARM::VLD1q64: case ARM::VLD1q8:
2344 case ARM::VLD1q16wb_fixed: case ARM::VLD1q16wb_register:
2345 case ARM::VLD1q32wb_fixed: case ARM::VLD1q32wb_register:
2346 case ARM::VLD1q64wb_fixed: case ARM::VLD1q64wb_register:
2347 case ARM::VLD1q8wb_fixed: case ARM::VLD1q8wb_register:
2348 case ARM::VLD2d16: case ARM::VLD2d32: case ARM::VLD2d8:
2349 case ARM::VLD2d16wb_fixed: case ARM::VLD2d16wb_register:
2350 case ARM::VLD2d32wb_fixed: case ARM::VLD2d32wb_register:
2351 case ARM::VLD2d8wb_fixed: case ARM::VLD2d8wb_register:
2352 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2353 return MCDisassembler::Fail;
2358 case ARM::VLD2b16wb_fixed:
2359 case ARM::VLD2b16wb_register:
2360 case ARM::VLD2b32wb_fixed:
2361 case ARM::VLD2b32wb_register:
2362 case ARM::VLD2b8wb_fixed:
2363 case ARM::VLD2b8wb_register:
2364 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2365 return MCDisassembler::Fail;
2368 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2369 return MCDisassembler::Fail;
2372 // Second output register
2373 switch (Inst.getOpcode()) {
2377 case ARM::VLD3d8_UPD:
2378 case ARM::VLD3d16_UPD:
2379 case ARM::VLD3d32_UPD:
2383 case ARM::VLD4d8_UPD:
2384 case ARM::VLD4d16_UPD:
2385 case ARM::VLD4d32_UPD:
2386 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2387 return MCDisassembler::Fail;
2392 case ARM::VLD3q8_UPD:
2393 case ARM::VLD3q16_UPD:
2394 case ARM::VLD3q32_UPD:
2398 case ARM::VLD4q8_UPD:
2399 case ARM::VLD4q16_UPD:
2400 case ARM::VLD4q32_UPD:
2401 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2402 return MCDisassembler::Fail;
2407 // Third output register
2408 switch(Inst.getOpcode()) {
2412 case ARM::VLD3d8_UPD:
2413 case ARM::VLD3d16_UPD:
2414 case ARM::VLD3d32_UPD:
2418 case ARM::VLD4d8_UPD:
2419 case ARM::VLD4d16_UPD:
2420 case ARM::VLD4d32_UPD:
2421 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2422 return MCDisassembler::Fail;
2427 case ARM::VLD3q8_UPD:
2428 case ARM::VLD3q16_UPD:
2429 case ARM::VLD3q32_UPD:
2433 case ARM::VLD4q8_UPD:
2434 case ARM::VLD4q16_UPD:
2435 case ARM::VLD4q32_UPD:
2436 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2437 return MCDisassembler::Fail;
2443 // Fourth output register
2444 switch (Inst.getOpcode()) {
2448 case ARM::VLD4d8_UPD:
2449 case ARM::VLD4d16_UPD:
2450 case ARM::VLD4d32_UPD:
2451 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2452 return MCDisassembler::Fail;
2457 case ARM::VLD4q8_UPD:
2458 case ARM::VLD4q16_UPD:
2459 case ARM::VLD4q32_UPD:
2460 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2461 return MCDisassembler::Fail;
2467 // Writeback operand
2468 switch (Inst.getOpcode()) {
2469 case ARM::VLD1d8wb_fixed:
2470 case ARM::VLD1d16wb_fixed:
2471 case ARM::VLD1d32wb_fixed:
2472 case ARM::VLD1d64wb_fixed:
2473 case ARM::VLD1d8wb_register:
2474 case ARM::VLD1d16wb_register:
2475 case ARM::VLD1d32wb_register:
2476 case ARM::VLD1d64wb_register:
2477 case ARM::VLD1q8wb_fixed:
2478 case ARM::VLD1q16wb_fixed:
2479 case ARM::VLD1q32wb_fixed:
2480 case ARM::VLD1q64wb_fixed:
2481 case ARM::VLD1q8wb_register:
2482 case ARM::VLD1q16wb_register:
2483 case ARM::VLD1q32wb_register:
2484 case ARM::VLD1q64wb_register:
2485 case ARM::VLD1d8Twb_fixed:
2486 case ARM::VLD1d8Twb_register:
2487 case ARM::VLD1d16Twb_fixed:
2488 case ARM::VLD1d16Twb_register:
2489 case ARM::VLD1d32Twb_fixed:
2490 case ARM::VLD1d32Twb_register:
2491 case ARM::VLD1d64Twb_fixed:
2492 case ARM::VLD1d64Twb_register:
2493 case ARM::VLD1d8Qwb_fixed:
2494 case ARM::VLD1d8Qwb_register:
2495 case ARM::VLD1d16Qwb_fixed:
2496 case ARM::VLD1d16Qwb_register:
2497 case ARM::VLD1d32Qwb_fixed:
2498 case ARM::VLD1d32Qwb_register:
2499 case ARM::VLD1d64Qwb_fixed:
2500 case ARM::VLD1d64Qwb_register:
2501 case ARM::VLD2d8wb_fixed:
2502 case ARM::VLD2d16wb_fixed:
2503 case ARM::VLD2d32wb_fixed:
2504 case ARM::VLD2q8wb_fixed:
2505 case ARM::VLD2q16wb_fixed:
2506 case ARM::VLD2q32wb_fixed:
2507 case ARM::VLD2d8wb_register:
2508 case ARM::VLD2d16wb_register:
2509 case ARM::VLD2d32wb_register:
2510 case ARM::VLD2q8wb_register:
2511 case ARM::VLD2q16wb_register:
2512 case ARM::VLD2q32wb_register:
2513 case ARM::VLD2b8wb_fixed:
2514 case ARM::VLD2b16wb_fixed:
2515 case ARM::VLD2b32wb_fixed:
2516 case ARM::VLD2b8wb_register:
2517 case ARM::VLD2b16wb_register:
2518 case ARM::VLD2b32wb_register:
2519 Inst.addOperand(MCOperand::createImm(0));
2521 case ARM::VLD3d8_UPD:
2522 case ARM::VLD3d16_UPD:
2523 case ARM::VLD3d32_UPD:
2524 case ARM::VLD3q8_UPD:
2525 case ARM::VLD3q16_UPD:
2526 case ARM::VLD3q32_UPD:
2527 case ARM::VLD4d8_UPD:
2528 case ARM::VLD4d16_UPD:
2529 case ARM::VLD4d32_UPD:
2530 case ARM::VLD4q8_UPD:
2531 case ARM::VLD4q16_UPD:
2532 case ARM::VLD4q32_UPD:
2533 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2534 return MCDisassembler::Fail;
2540 // AddrMode6 Base (register+alignment)
2541 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2542 return MCDisassembler::Fail;
2544 // AddrMode6 Offset (register)
2545 switch (Inst.getOpcode()) {
2547 // The below have been updated to have explicit am6offset split
2548 // between fixed and register offset. For those instructions not
2549 // yet updated, we need to add an additional reg0 operand for the
2552 // The fixed offset encodes as Rm == 0xd, so we check for that.
2554 Inst.addOperand(MCOperand::createReg(0));
2557 // Fall through to handle the register offset variant.
2559 case ARM::VLD1d8wb_fixed:
2560 case ARM::VLD1d16wb_fixed:
2561 case ARM::VLD1d32wb_fixed:
2562 case ARM::VLD1d64wb_fixed:
2563 case ARM::VLD1d8Twb_fixed:
2564 case ARM::VLD1d16Twb_fixed:
2565 case ARM::VLD1d32Twb_fixed:
2566 case ARM::VLD1d64Twb_fixed:
2567 case ARM::VLD1d8Qwb_fixed:
2568 case ARM::VLD1d16Qwb_fixed:
2569 case ARM::VLD1d32Qwb_fixed:
2570 case ARM::VLD1d64Qwb_fixed:
2571 case ARM::VLD1d8wb_register:
2572 case ARM::VLD1d16wb_register:
2573 case ARM::VLD1d32wb_register:
2574 case ARM::VLD1d64wb_register:
2575 case ARM::VLD1q8wb_fixed:
2576 case ARM::VLD1q16wb_fixed:
2577 case ARM::VLD1q32wb_fixed:
2578 case ARM::VLD1q64wb_fixed:
2579 case ARM::VLD1q8wb_register:
2580 case ARM::VLD1q16wb_register:
2581 case ARM::VLD1q32wb_register:
2582 case ARM::VLD1q64wb_register:
2583 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2584 // variant encodes Rm == 0xf. Anything else is a register offset post-
2585 // increment and we need to add the register operand to the instruction.
2586 if (Rm != 0xD && Rm != 0xF &&
2587 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2588 return MCDisassembler::Fail;
2590 case ARM::VLD2d8wb_fixed:
2591 case ARM::VLD2d16wb_fixed:
2592 case ARM::VLD2d32wb_fixed:
2593 case ARM::VLD2b8wb_fixed:
2594 case ARM::VLD2b16wb_fixed:
2595 case ARM::VLD2b32wb_fixed:
2596 case ARM::VLD2q8wb_fixed:
2597 case ARM::VLD2q16wb_fixed:
2598 case ARM::VLD2q32wb_fixed:
2605 static DecodeStatus DecodeVLDST1Instruction(MCInst &Inst, unsigned Insn,
2606 uint64_t Address, const void *Decoder) {
2607 unsigned type = fieldFromInstruction(Insn, 8, 4);
2608 unsigned align = fieldFromInstruction(Insn, 4, 2);
2609 if (type == 6 && (align & 2)) return MCDisassembler::Fail;
2610 if (type == 7 && (align & 2)) return MCDisassembler::Fail;
2611 if (type == 10 && align == 3) return MCDisassembler::Fail;
2613 unsigned load = fieldFromInstruction(Insn, 21, 1);
2614 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
2615 : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
2618 static DecodeStatus DecodeVLDST2Instruction(MCInst &Inst, unsigned Insn,
2619 uint64_t Address, const void *Decoder) {
2620 unsigned size = fieldFromInstruction(Insn, 6, 2);
2621 if (size == 3) return MCDisassembler::Fail;
2623 unsigned type = fieldFromInstruction(Insn, 8, 4);
2624 unsigned align = fieldFromInstruction(Insn, 4, 2);
2625 if (type == 8 && align == 3) return MCDisassembler::Fail;
2626 if (type == 9 && align == 3) return MCDisassembler::Fail;
2628 unsigned load = fieldFromInstruction(Insn, 21, 1);
2629 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
2630 : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
2633 static DecodeStatus DecodeVLDST3Instruction(MCInst &Inst, unsigned Insn,
2634 uint64_t Address, const void *Decoder) {
2635 unsigned size = fieldFromInstruction(Insn, 6, 2);
2636 if (size == 3) return MCDisassembler::Fail;
2638 unsigned align = fieldFromInstruction(Insn, 4, 2);
2639 if (align & 2) return MCDisassembler::Fail;
2641 unsigned load = fieldFromInstruction(Insn, 21, 1);
2642 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
2643 : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
2646 static DecodeStatus DecodeVLDST4Instruction(MCInst &Inst, unsigned Insn,
2647 uint64_t Address, const void *Decoder) {
2648 unsigned size = fieldFromInstruction(Insn, 6, 2);
2649 if (size == 3) return MCDisassembler::Fail;
2651 unsigned load = fieldFromInstruction(Insn, 21, 1);
2652 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
2653 : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
2656 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Insn,
2657 uint64_t Address, const void *Decoder) {
2658 DecodeStatus S = MCDisassembler::Success;
2660 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2661 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2662 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2663 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2664 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2665 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2667 // Writeback Operand
2668 switch (Inst.getOpcode()) {
2669 case ARM::VST1d8wb_fixed:
2670 case ARM::VST1d16wb_fixed:
2671 case ARM::VST1d32wb_fixed:
2672 case ARM::VST1d64wb_fixed:
2673 case ARM::VST1d8wb_register:
2674 case ARM::VST1d16wb_register:
2675 case ARM::VST1d32wb_register:
2676 case ARM::VST1d64wb_register:
2677 case ARM::VST1q8wb_fixed:
2678 case ARM::VST1q16wb_fixed:
2679 case ARM::VST1q32wb_fixed:
2680 case ARM::VST1q64wb_fixed:
2681 case ARM::VST1q8wb_register:
2682 case ARM::VST1q16wb_register:
2683 case ARM::VST1q32wb_register:
2684 case ARM::VST1q64wb_register:
2685 case ARM::VST1d8Twb_fixed:
2686 case ARM::VST1d16Twb_fixed:
2687 case ARM::VST1d32Twb_fixed:
2688 case ARM::VST1d64Twb_fixed:
2689 case ARM::VST1d8Twb_register:
2690 case ARM::VST1d16Twb_register:
2691 case ARM::VST1d32Twb_register:
2692 case ARM::VST1d64Twb_register:
2693 case ARM::VST1d8Qwb_fixed:
2694 case ARM::VST1d16Qwb_fixed:
2695 case ARM::VST1d32Qwb_fixed:
2696 case ARM::VST1d64Qwb_fixed:
2697 case ARM::VST1d8Qwb_register:
2698 case ARM::VST1d16Qwb_register:
2699 case ARM::VST1d32Qwb_register:
2700 case ARM::VST1d64Qwb_register:
2701 case ARM::VST2d8wb_fixed:
2702 case ARM::VST2d16wb_fixed:
2703 case ARM::VST2d32wb_fixed:
2704 case ARM::VST2d8wb_register:
2705 case ARM::VST2d16wb_register:
2706 case ARM::VST2d32wb_register:
2707 case ARM::VST2q8wb_fixed:
2708 case ARM::VST2q16wb_fixed:
2709 case ARM::VST2q32wb_fixed:
2710 case ARM::VST2q8wb_register:
2711 case ARM::VST2q16wb_register:
2712 case ARM::VST2q32wb_register:
2713 case ARM::VST2b8wb_fixed:
2714 case ARM::VST2b16wb_fixed:
2715 case ARM::VST2b32wb_fixed:
2716 case ARM::VST2b8wb_register:
2717 case ARM::VST2b16wb_register:
2718 case ARM::VST2b32wb_register:
2720 return MCDisassembler::Fail;
2721 Inst.addOperand(MCOperand::createImm(0));
2723 case ARM::VST3d8_UPD:
2724 case ARM::VST3d16_UPD:
2725 case ARM::VST3d32_UPD:
2726 case ARM::VST3q8_UPD:
2727 case ARM::VST3q16_UPD:
2728 case ARM::VST3q32_UPD:
2729 case ARM::VST4d8_UPD:
2730 case ARM::VST4d16_UPD:
2731 case ARM::VST4d32_UPD:
2732 case ARM::VST4q8_UPD:
2733 case ARM::VST4q16_UPD:
2734 case ARM::VST4q32_UPD:
2735 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2736 return MCDisassembler::Fail;
2742 // AddrMode6 Base (register+alignment)
2743 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2744 return MCDisassembler::Fail;
2746 // AddrMode6 Offset (register)
2747 switch (Inst.getOpcode()) {
2750 Inst.addOperand(MCOperand::createReg(0));
2751 else if (Rm != 0xF) {
2752 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2753 return MCDisassembler::Fail;
2756 case ARM::VST1d8wb_fixed:
2757 case ARM::VST1d16wb_fixed:
2758 case ARM::VST1d32wb_fixed:
2759 case ARM::VST1d64wb_fixed:
2760 case ARM::VST1q8wb_fixed:
2761 case ARM::VST1q16wb_fixed:
2762 case ARM::VST1q32wb_fixed:
2763 case ARM::VST1q64wb_fixed:
2764 case ARM::VST1d8Twb_fixed:
2765 case ARM::VST1d16Twb_fixed:
2766 case ARM::VST1d32Twb_fixed:
2767 case ARM::VST1d64Twb_fixed:
2768 case ARM::VST1d8Qwb_fixed:
2769 case ARM::VST1d16Qwb_fixed:
2770 case ARM::VST1d32Qwb_fixed:
2771 case ARM::VST1d64Qwb_fixed:
2772 case ARM::VST2d8wb_fixed:
2773 case ARM::VST2d16wb_fixed:
2774 case ARM::VST2d32wb_fixed:
2775 case ARM::VST2q8wb_fixed:
2776 case ARM::VST2q16wb_fixed:
2777 case ARM::VST2q32wb_fixed:
2778 case ARM::VST2b8wb_fixed:
2779 case ARM::VST2b16wb_fixed:
2780 case ARM::VST2b32wb_fixed:
2785 // First input register
2786 switch (Inst.getOpcode()) {
2791 case ARM::VST1q16wb_fixed:
2792 case ARM::VST1q16wb_register:
2793 case ARM::VST1q32wb_fixed:
2794 case ARM::VST1q32wb_register:
2795 case ARM::VST1q64wb_fixed:
2796 case ARM::VST1q64wb_register:
2797 case ARM::VST1q8wb_fixed:
2798 case ARM::VST1q8wb_register:
2802 case ARM::VST2d16wb_fixed:
2803 case ARM::VST2d16wb_register:
2804 case ARM::VST2d32wb_fixed:
2805 case ARM::VST2d32wb_register:
2806 case ARM::VST2d8wb_fixed:
2807 case ARM::VST2d8wb_register:
2808 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2809 return MCDisassembler::Fail;
2814 case ARM::VST2b16wb_fixed:
2815 case ARM::VST2b16wb_register:
2816 case ARM::VST2b32wb_fixed:
2817 case ARM::VST2b32wb_register:
2818 case ARM::VST2b8wb_fixed:
2819 case ARM::VST2b8wb_register:
2820 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2821 return MCDisassembler::Fail;
2824 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2825 return MCDisassembler::Fail;
2828 // Second input register
2829 switch (Inst.getOpcode()) {
2833 case ARM::VST3d8_UPD:
2834 case ARM::VST3d16_UPD:
2835 case ARM::VST3d32_UPD:
2839 case ARM::VST4d8_UPD:
2840 case ARM::VST4d16_UPD:
2841 case ARM::VST4d32_UPD:
2842 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2843 return MCDisassembler::Fail;
2848 case ARM::VST3q8_UPD:
2849 case ARM::VST3q16_UPD:
2850 case ARM::VST3q32_UPD:
2854 case ARM::VST4q8_UPD:
2855 case ARM::VST4q16_UPD:
2856 case ARM::VST4q32_UPD:
2857 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2858 return MCDisassembler::Fail;
2864 // Third input register
2865 switch (Inst.getOpcode()) {
2869 case ARM::VST3d8_UPD:
2870 case ARM::VST3d16_UPD:
2871 case ARM::VST3d32_UPD:
2875 case ARM::VST4d8_UPD:
2876 case ARM::VST4d16_UPD:
2877 case ARM::VST4d32_UPD:
2878 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2879 return MCDisassembler::Fail;
2884 case ARM::VST3q8_UPD:
2885 case ARM::VST3q16_UPD:
2886 case ARM::VST3q32_UPD:
2890 case ARM::VST4q8_UPD:
2891 case ARM::VST4q16_UPD:
2892 case ARM::VST4q32_UPD:
2893 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2894 return MCDisassembler::Fail;
2900 // Fourth input register
2901 switch (Inst.getOpcode()) {
2905 case ARM::VST4d8_UPD:
2906 case ARM::VST4d16_UPD:
2907 case ARM::VST4d32_UPD:
2908 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2909 return MCDisassembler::Fail;
2914 case ARM::VST4q8_UPD:
2915 case ARM::VST4q16_UPD:
2916 case ARM::VST4q32_UPD:
2917 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2918 return MCDisassembler::Fail;
2927 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Insn,
2928 uint64_t Address, const void *Decoder) {
2929 DecodeStatus S = MCDisassembler::Success;
2931 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2932 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2933 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2934 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2935 unsigned align = fieldFromInstruction(Insn, 4, 1);
2936 unsigned size = fieldFromInstruction(Insn, 6, 2);
2938 if (size == 0 && align == 1)
2939 return MCDisassembler::Fail;
2940 align *= (1 << size);
2942 switch (Inst.getOpcode()) {
2943 case ARM::VLD1DUPq16: case ARM::VLD1DUPq32: case ARM::VLD1DUPq8:
2944 case ARM::VLD1DUPq16wb_fixed: case ARM::VLD1DUPq16wb_register:
2945 case ARM::VLD1DUPq32wb_fixed: case ARM::VLD1DUPq32wb_register:
2946 case ARM::VLD1DUPq8wb_fixed: case ARM::VLD1DUPq8wb_register:
2947 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2948 return MCDisassembler::Fail;
2951 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2952 return MCDisassembler::Fail;
2956 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2957 return MCDisassembler::Fail;
2960 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2961 return MCDisassembler::Fail;
2962 Inst.addOperand(MCOperand::createImm(align));
2964 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2965 // variant encodes Rm == 0xf. Anything else is a register offset post-
2966 // increment and we need to add the register operand to the instruction.
2967 if (Rm != 0xD && Rm != 0xF &&
2968 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2969 return MCDisassembler::Fail;
2974 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Insn,
2975 uint64_t Address, const void *Decoder) {
2976 DecodeStatus S = MCDisassembler::Success;
2978 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2979 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2980 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2981 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2982 unsigned align = fieldFromInstruction(Insn, 4, 1);
2983 unsigned size = 1 << fieldFromInstruction(Insn, 6, 2);
2986 switch (Inst.getOpcode()) {
2987 case ARM::VLD2DUPd16: case ARM::VLD2DUPd32: case ARM::VLD2DUPd8:
2988 case ARM::VLD2DUPd16wb_fixed: case ARM::VLD2DUPd16wb_register:
2989 case ARM::VLD2DUPd32wb_fixed: case ARM::VLD2DUPd32wb_register:
2990 case ARM::VLD2DUPd8wb_fixed: case ARM::VLD2DUPd8wb_register:
2991 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2992 return MCDisassembler::Fail;
2994 case ARM::VLD2DUPd16x2: case ARM::VLD2DUPd32x2: case ARM::VLD2DUPd8x2:
2995 case ARM::VLD2DUPd16x2wb_fixed: case ARM::VLD2DUPd16x2wb_register:
2996 case ARM::VLD2DUPd32x2wb_fixed: case ARM::VLD2DUPd32x2wb_register:
2997 case ARM::VLD2DUPd8x2wb_fixed: case ARM::VLD2DUPd8x2wb_register:
2998 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2999 return MCDisassembler::Fail;
3002 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3003 return MCDisassembler::Fail;
3008 Inst.addOperand(MCOperand::createImm(0));
3010 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3011 return MCDisassembler::Fail;
3012 Inst.addOperand(MCOperand::createImm(align));
3014 if (Rm != 0xD && Rm != 0xF) {
3015 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3016 return MCDisassembler::Fail;
3022 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Insn,
3023 uint64_t Address, const void *Decoder) {
3024 DecodeStatus S = MCDisassembler::Success;
3026 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3027 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3028 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3029 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3030 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
3032 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3033 return MCDisassembler::Fail;
3034 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
3035 return MCDisassembler::Fail;
3036 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
3037 return MCDisassembler::Fail;
3039 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3040 return MCDisassembler::Fail;
3043 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3044 return MCDisassembler::Fail;
3045 Inst.addOperand(MCOperand::createImm(0));
3048 Inst.addOperand(MCOperand::createReg(0));
3049 else if (Rm != 0xF) {
3050 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3051 return MCDisassembler::Fail;
3057 static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Insn,
3058 uint64_t Address, const void *Decoder) {
3059 DecodeStatus S = MCDisassembler::Success;
3061 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3062 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3063 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3064 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3065 unsigned size = fieldFromInstruction(Insn, 6, 2);
3066 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
3067 unsigned align = fieldFromInstruction(Insn, 4, 1);
3071 return MCDisassembler::Fail;
3082 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3083 return MCDisassembler::Fail;
3084 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
3085 return MCDisassembler::Fail;
3086 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
3087 return MCDisassembler::Fail;
3088 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
3089 return MCDisassembler::Fail;
3091 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3092 return MCDisassembler::Fail;
3095 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3096 return MCDisassembler::Fail;
3097 Inst.addOperand(MCOperand::createImm(align));
3100 Inst.addOperand(MCOperand::createReg(0));
3101 else if (Rm != 0xF) {
3102 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3103 return MCDisassembler::Fail;
3110 DecodeNEONModImmInstruction(MCInst &Inst, unsigned Insn,
3111 uint64_t Address, const void *Decoder) {
3112 DecodeStatus S = MCDisassembler::Success;
3114 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3115 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3116 unsigned imm = fieldFromInstruction(Insn, 0, 4);
3117 imm |= fieldFromInstruction(Insn, 16, 3) << 4;
3118 imm |= fieldFromInstruction(Insn, 24, 1) << 7;
3119 imm |= fieldFromInstruction(Insn, 8, 4) << 8;
3120 imm |= fieldFromInstruction(Insn, 5, 1) << 12;
3121 unsigned Q = fieldFromInstruction(Insn, 6, 1);
3124 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
3125 return MCDisassembler::Fail;
3127 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3128 return MCDisassembler::Fail;
3131 Inst.addOperand(MCOperand::createImm(imm));
3133 switch (Inst.getOpcode()) {
3134 case ARM::VORRiv4i16:
3135 case ARM::VORRiv2i32:
3136 case ARM::VBICiv4i16:
3137 case ARM::VBICiv2i32:
3138 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3139 return MCDisassembler::Fail;
3141 case ARM::VORRiv8i16:
3142 case ARM::VORRiv4i32:
3143 case ARM::VBICiv8i16:
3144 case ARM::VBICiv4i32:
3145 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
3146 return MCDisassembler::Fail;
3155 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Insn,
3156 uint64_t Address, const void *Decoder) {
3157 DecodeStatus S = MCDisassembler::Success;
3159 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3160 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3161 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3162 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
3163 unsigned size = fieldFromInstruction(Insn, 18, 2);
3165 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
3166 return MCDisassembler::Fail;
3167 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
3168 return MCDisassembler::Fail;
3169 Inst.addOperand(MCOperand::createImm(8 << size));
3174 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
3175 uint64_t Address, const void *Decoder) {
3176 Inst.addOperand(MCOperand::createImm(8 - Val));
3177 return MCDisassembler::Success;
3180 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
3181 uint64_t Address, const void *Decoder) {
3182 Inst.addOperand(MCOperand::createImm(16 - Val));
3183 return MCDisassembler::Success;
3186 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
3187 uint64_t Address, const void *Decoder) {
3188 Inst.addOperand(MCOperand::createImm(32 - Val));
3189 return MCDisassembler::Success;
3192 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
3193 uint64_t Address, const void *Decoder) {
3194 Inst.addOperand(MCOperand::createImm(64 - Val));
3195 return MCDisassembler::Success;
3198 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
3199 uint64_t Address, const void *Decoder) {
3200 DecodeStatus S = MCDisassembler::Success;
3202 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3203 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3204 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3205 Rn |= fieldFromInstruction(Insn, 7, 1) << 4;
3206 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3207 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
3208 unsigned op = fieldFromInstruction(Insn, 6, 1);
3210 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3211 return MCDisassembler::Fail;
3213 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3214 return MCDisassembler::Fail; // Writeback
3217 switch (Inst.getOpcode()) {
3220 if (!Check(S, DecodeDPairRegisterClass(Inst, Rn, Address, Decoder)))
3221 return MCDisassembler::Fail;
3224 if (!Check(S, DecodeDPRRegisterClass(Inst, Rn, Address, Decoder)))
3225 return MCDisassembler::Fail;
3228 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
3229 return MCDisassembler::Fail;
3234 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
3235 uint64_t Address, const void *Decoder) {
3236 DecodeStatus S = MCDisassembler::Success;
3238 unsigned dst = fieldFromInstruction(Insn, 8, 3);
3239 unsigned imm = fieldFromInstruction(Insn, 0, 8);
3241 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
3242 return MCDisassembler::Fail;
3244 switch(Inst.getOpcode()) {
3246 return MCDisassembler::Fail;
3248 break; // tADR does not explicitly represent the PC as an operand.
3250 Inst.addOperand(MCOperand::createReg(ARM::SP));
3254 Inst.addOperand(MCOperand::createImm(imm));
3258 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
3259 uint64_t Address, const void *Decoder) {
3260 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<12>(Val<<1) + 4,
3261 true, 2, Inst, Decoder))
3262 Inst.addOperand(MCOperand::createImm(SignExtend32<12>(Val << 1)));
3263 return MCDisassembler::Success;
3266 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
3267 uint64_t Address, const void *Decoder) {
3268 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<21>(Val) + 4,
3269 true, 4, Inst, Decoder))
3270 Inst.addOperand(MCOperand::createImm(SignExtend32<21>(Val)));
3271 return MCDisassembler::Success;
3274 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
3275 uint64_t Address, const void *Decoder) {
3276 if (!tryAddingSymbolicOperand(Address, Address + (Val<<1) + 4,
3277 true, 2, Inst, Decoder))
3278 Inst.addOperand(MCOperand::createImm(Val << 1));
3279 return MCDisassembler::Success;
3282 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
3283 uint64_t Address, const void *Decoder) {
3284 DecodeStatus S = MCDisassembler::Success;
3286 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3287 unsigned Rm = fieldFromInstruction(Val, 3, 3);
3289 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3290 return MCDisassembler::Fail;
3291 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
3292 return MCDisassembler::Fail;
3297 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
3298 uint64_t Address, const void *Decoder) {
3299 DecodeStatus S = MCDisassembler::Success;
3301 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3302 unsigned imm = fieldFromInstruction(Val, 3, 5);
3304 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3305 return MCDisassembler::Fail;
3306 Inst.addOperand(MCOperand::createImm(imm));
3311 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
3312 uint64_t Address, const void *Decoder) {
3313 unsigned imm = Val << 2;
3315 Inst.addOperand(MCOperand::createImm(imm));
3316 tryAddingPcLoadReferenceComment(Address, (Address & ~2u) + imm + 4, Decoder);
3318 return MCDisassembler::Success;
3321 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
3322 uint64_t Address, const void *Decoder) {
3323 Inst.addOperand(MCOperand::createReg(ARM::SP));
3324 Inst.addOperand(MCOperand::createImm(Val));
3326 return MCDisassembler::Success;
3329 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
3330 uint64_t Address, const void *Decoder) {
3331 DecodeStatus S = MCDisassembler::Success;
3333 unsigned Rn = fieldFromInstruction(Val, 6, 4);
3334 unsigned Rm = fieldFromInstruction(Val, 2, 4);
3335 unsigned imm = fieldFromInstruction(Val, 0, 2);
3337 // Thumb stores cannot use PC as dest register.
3338 switch (Inst.getOpcode()) {
3343 return MCDisassembler::Fail;
3348 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3349 return MCDisassembler::Fail;
3350 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3351 return MCDisassembler::Fail;
3352 Inst.addOperand(MCOperand::createImm(imm));
3357 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Insn,
3358 uint64_t Address, const void *Decoder) {
3359 DecodeStatus S = MCDisassembler::Success;
3361 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3362 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3364 const FeatureBitset &featureBits =
3365 ((const MCDisassembler*)Decoder)->getSubtargetInfo().getFeatureBits();
3367 bool hasMP = featureBits[ARM::FeatureMP];
3368 bool hasV7Ops = featureBits[ARM::HasV7Ops];
3371 switch (Inst.getOpcode()) {
3373 Inst.setOpcode(ARM::t2LDRBpci);
3376 Inst.setOpcode(ARM::t2LDRHpci);
3379 Inst.setOpcode(ARM::t2LDRSHpci);
3382 Inst.setOpcode(ARM::t2LDRSBpci);
3385 Inst.setOpcode(ARM::t2LDRpci);
3388 Inst.setOpcode(ARM::t2PLDpci);
3391 Inst.setOpcode(ARM::t2PLIpci);
3394 return MCDisassembler::Fail;
3397 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3401 switch (Inst.getOpcode()) {
3403 return MCDisassembler::Fail;
3405 Inst.setOpcode(ARM::t2PLDWs);
3408 Inst.setOpcode(ARM::t2PLIs);
3414 switch (Inst.getOpcode()) {
3419 return MCDisassembler::Fail;
3422 if (!hasV7Ops || !hasMP)
3423 return MCDisassembler::Fail;
3426 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3427 return MCDisassembler::Fail;
3430 unsigned addrmode = fieldFromInstruction(Insn, 4, 2);
3431 addrmode |= fieldFromInstruction(Insn, 0, 4) << 2;
3432 addrmode |= fieldFromInstruction(Insn, 16, 4) << 6;
3433 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
3434 return MCDisassembler::Fail;
3439 static DecodeStatus DecodeT2LoadImm8(MCInst &Inst, unsigned Insn,
3440 uint64_t Address, const void* Decoder) {
3441 DecodeStatus S = MCDisassembler::Success;
3443 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3444 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3445 unsigned U = fieldFromInstruction(Insn, 9, 1);
3446 unsigned imm = fieldFromInstruction(Insn, 0, 8);
3449 unsigned add = fieldFromInstruction(Insn, 9, 1);
3451 const FeatureBitset &featureBits =
3452 ((const MCDisassembler*)Decoder)->getSubtargetInfo().getFeatureBits();
3454 bool hasMP = featureBits[ARM::FeatureMP];
3455 bool hasV7Ops = featureBits[ARM::HasV7Ops];
3458 switch (Inst.getOpcode()) {
3460 Inst.setOpcode(ARM::t2LDRpci);
3463 Inst.setOpcode(ARM::t2LDRBpci);
3465 case ARM::t2LDRSBi8:
3466 Inst.setOpcode(ARM::t2LDRSBpci);
3469 Inst.setOpcode(ARM::t2LDRHpci);
3471 case ARM::t2LDRSHi8:
3472 Inst.setOpcode(ARM::t2LDRSHpci);
3475 Inst.setOpcode(ARM::t2PLDpci);
3478 Inst.setOpcode(ARM::t2PLIpci);
3481 return MCDisassembler::Fail;
3483 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3487 switch (Inst.getOpcode()) {
3488 case ARM::t2LDRSHi8:
3489 return MCDisassembler::Fail;
3492 Inst.setOpcode(ARM::t2PLDWi8);
3494 case ARM::t2LDRSBi8:
3495 Inst.setOpcode(ARM::t2PLIi8);
3502 switch (Inst.getOpcode()) {
3507 return MCDisassembler::Fail;
3510 if (!hasV7Ops || !hasMP)
3511 return MCDisassembler::Fail;
3514 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3515 return MCDisassembler::Fail;
3518 if (!Check(S, DecodeT2AddrModeImm8(Inst, imm, Address, Decoder)))
3519 return MCDisassembler::Fail;
3523 static DecodeStatus DecodeT2LoadImm12(MCInst &Inst, unsigned Insn,
3524 uint64_t Address, const void* Decoder) {
3525 DecodeStatus S = MCDisassembler::Success;
3527 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3528 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3529 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3532 const FeatureBitset &featureBits =
3533 ((const MCDisassembler*)Decoder)->getSubtargetInfo().getFeatureBits();
3535 bool hasMP = featureBits[ARM::FeatureMP];
3536 bool hasV7Ops = featureBits[ARM::HasV7Ops];
3539 switch (Inst.getOpcode()) {
3541 Inst.setOpcode(ARM::t2LDRpci);
3543 case ARM::t2LDRHi12:
3544 Inst.setOpcode(ARM::t2LDRHpci);
3546 case ARM::t2LDRSHi12:
3547 Inst.setOpcode(ARM::t2LDRSHpci);
3549 case ARM::t2LDRBi12:
3550 Inst.setOpcode(ARM::t2LDRBpci);
3552 case ARM::t2LDRSBi12:
3553 Inst.setOpcode(ARM::t2LDRSBpci);
3556 Inst.setOpcode(ARM::t2PLDpci);
3559 Inst.setOpcode(ARM::t2PLIpci);
3562 return MCDisassembler::Fail;
3564 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3568 switch (Inst.getOpcode()) {
3569 case ARM::t2LDRSHi12:
3570 return MCDisassembler::Fail;
3571 case ARM::t2LDRHi12:
3572 Inst.setOpcode(ARM::t2PLDWi12);
3574 case ARM::t2LDRSBi12:
3575 Inst.setOpcode(ARM::t2PLIi12);
3582 switch (Inst.getOpcode()) {
3587 return MCDisassembler::Fail;
3589 case ARM::t2PLDWi12:
3590 if (!hasV7Ops || !hasMP)
3591 return MCDisassembler::Fail;
3594 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3595 return MCDisassembler::Fail;
3598 if (!Check(S, DecodeT2AddrModeImm12(Inst, imm, Address, Decoder)))
3599 return MCDisassembler::Fail;
3603 static DecodeStatus DecodeT2LoadT(MCInst &Inst, unsigned Insn,
3604 uint64_t Address, const void* Decoder) {
3605 DecodeStatus S = MCDisassembler::Success;
3607 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3608 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3609 unsigned imm = fieldFromInstruction(Insn, 0, 8);
3613 switch (Inst.getOpcode()) {
3615 Inst.setOpcode(ARM::t2LDRpci);
3618 Inst.setOpcode(ARM::t2LDRBpci);
3621 Inst.setOpcode(ARM::t2LDRHpci);
3624 Inst.setOpcode(ARM::t2LDRSBpci);
3627 Inst.setOpcode(ARM::t2LDRSHpci);
3630 return MCDisassembler::Fail;
3632 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3635 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3636 return MCDisassembler::Fail;
3637 if (!Check(S, DecodeT2AddrModeImm8(Inst, imm, Address, Decoder)))
3638 return MCDisassembler::Fail;
3642 static DecodeStatus DecodeT2LoadLabel(MCInst &Inst, unsigned Insn,
3643 uint64_t Address, const void* Decoder) {
3644 DecodeStatus S = MCDisassembler::Success;
3646 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3647 unsigned U = fieldFromInstruction(Insn, 23, 1);
3648 int imm = fieldFromInstruction(Insn, 0, 12);
3650 const FeatureBitset &featureBits =
3651 ((const MCDisassembler*)Decoder)->getSubtargetInfo().getFeatureBits();
3653 bool hasV7Ops = featureBits[ARM::HasV7Ops];
3656 switch (Inst.getOpcode()) {
3657 case ARM::t2LDRBpci:
3658 case ARM::t2LDRHpci:
3659 Inst.setOpcode(ARM::t2PLDpci);
3661 case ARM::t2LDRSBpci:
3662 Inst.setOpcode(ARM::t2PLIpci);
3664 case ARM::t2LDRSHpci:
3665 return MCDisassembler::Fail;
3671 switch(Inst.getOpcode()) {
3676 return MCDisassembler::Fail;
3679 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3680 return MCDisassembler::Fail;
3684 // Special case for #-0.
3690 Inst.addOperand(MCOperand::createImm(imm));
3695 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
3696 uint64_t Address, const void *Decoder) {
3698 Inst.addOperand(MCOperand::createImm(INT32_MIN));
3700 int imm = Val & 0xFF;
3702 if (!(Val & 0x100)) imm *= -1;
3703 Inst.addOperand(MCOperand::createImm(imm * 4));
3706 return MCDisassembler::Success;
3709 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
3710 uint64_t Address, const void *Decoder) {
3711 DecodeStatus S = MCDisassembler::Success;
3713 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3714 unsigned imm = fieldFromInstruction(Val, 0, 9);
3716 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3717 return MCDisassembler::Fail;
3718 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
3719 return MCDisassembler::Fail;
3724 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
3725 uint64_t Address, const void *Decoder) {
3726 DecodeStatus S = MCDisassembler::Success;
3728 unsigned Rn = fieldFromInstruction(Val, 8, 4);
3729 unsigned imm = fieldFromInstruction(Val, 0, 8);
3731 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
3732 return MCDisassembler::Fail;
3734 Inst.addOperand(MCOperand::createImm(imm));
3739 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
3740 uint64_t Address, const void *Decoder) {
3741 int imm = Val & 0xFF;
3744 else if (!(Val & 0x100))
3746 Inst.addOperand(MCOperand::createImm(imm));
3748 return MCDisassembler::Success;
3752 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
3753 uint64_t Address, const void *Decoder) {
3754 DecodeStatus S = MCDisassembler::Success;
3756 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3757 unsigned imm = fieldFromInstruction(Val, 0, 9);
3759 // Thumb stores cannot use PC as dest register.
3760 switch (Inst.getOpcode()) {
3768 return MCDisassembler::Fail;
3774 // Some instructions always use an additive offset.
3775 switch (Inst.getOpcode()) {
3790 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3791 return MCDisassembler::Fail;
3792 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
3793 return MCDisassembler::Fail;
3798 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Insn,
3799 uint64_t Address, const void *Decoder) {
3800 DecodeStatus S = MCDisassembler::Success;
3802 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3803 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3804 unsigned addr = fieldFromInstruction(Insn, 0, 8);
3805 addr |= fieldFromInstruction(Insn, 9, 1) << 8;
3807 unsigned load = fieldFromInstruction(Insn, 20, 1);
3810 switch (Inst.getOpcode()) {
3811 case ARM::t2LDR_PRE:
3812 case ARM::t2LDR_POST:
3813 Inst.setOpcode(ARM::t2LDRpci);
3815 case ARM::t2LDRB_PRE:
3816 case ARM::t2LDRB_POST:
3817 Inst.setOpcode(ARM::t2LDRBpci);
3819 case ARM::t2LDRH_PRE:
3820 case ARM::t2LDRH_POST:
3821 Inst.setOpcode(ARM::t2LDRHpci);
3823 case ARM::t2LDRSB_PRE:
3824 case ARM::t2LDRSB_POST:
3826 Inst.setOpcode(ARM::t2PLIpci);
3828 Inst.setOpcode(ARM::t2LDRSBpci);
3830 case ARM::t2LDRSH_PRE:
3831 case ARM::t2LDRSH_POST:
3832 Inst.setOpcode(ARM::t2LDRSHpci);
3835 return MCDisassembler::Fail;
3837 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3841 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3842 return MCDisassembler::Fail;
3845 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3846 return MCDisassembler::Fail;
3849 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3850 return MCDisassembler::Fail;
3853 if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
3854 return MCDisassembler::Fail;
3859 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
3860 uint64_t Address, const void *Decoder) {
3861 DecodeStatus S = MCDisassembler::Success;
3863 unsigned Rn = fieldFromInstruction(Val, 13, 4);
3864 unsigned imm = fieldFromInstruction(Val, 0, 12);
3866 // Thumb stores cannot use PC as dest register.
3867 switch (Inst.getOpcode()) {
3869 case ARM::t2STRBi12:
3870 case ARM::t2STRHi12:
3872 return MCDisassembler::Fail;
3877 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3878 return MCDisassembler::Fail;
3879 Inst.addOperand(MCOperand::createImm(imm));
3885 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Insn,
3886 uint64_t Address, const void *Decoder) {
3887 unsigned imm = fieldFromInstruction(Insn, 0, 7);
3889 Inst.addOperand(MCOperand::createReg(ARM::SP));
3890 Inst.addOperand(MCOperand::createReg(ARM::SP));
3891 Inst.addOperand(MCOperand::createImm(imm));
3893 return MCDisassembler::Success;
3896 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
3897 uint64_t Address, const void *Decoder) {
3898 DecodeStatus S = MCDisassembler::Success;
3900 if (Inst.getOpcode() == ARM::tADDrSP) {
3901 unsigned Rdm = fieldFromInstruction(Insn, 0, 3);
3902 Rdm |= fieldFromInstruction(Insn, 7, 1) << 3;
3904 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3905 return MCDisassembler::Fail;
3906 Inst.addOperand(MCOperand::createReg(ARM::SP));
3907 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3908 return MCDisassembler::Fail;
3909 } else if (Inst.getOpcode() == ARM::tADDspr) {
3910 unsigned Rm = fieldFromInstruction(Insn, 3, 4);
3912 Inst.addOperand(MCOperand::createReg(ARM::SP));
3913 Inst.addOperand(MCOperand::createReg(ARM::SP));
3914 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3915 return MCDisassembler::Fail;
3921 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
3922 uint64_t Address, const void *Decoder) {
3923 unsigned imod = fieldFromInstruction(Insn, 4, 1) | 0x2;
3924 unsigned flags = fieldFromInstruction(Insn, 0, 3);
3926 Inst.addOperand(MCOperand::createImm(imod));
3927 Inst.addOperand(MCOperand::createImm(flags));
3929 return MCDisassembler::Success;
3932 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
3933 uint64_t Address, const void *Decoder) {
3934 DecodeStatus S = MCDisassembler::Success;
3935 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3936 unsigned add = fieldFromInstruction(Insn, 4, 1);
3938 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
3939 return MCDisassembler::Fail;
3940 Inst.addOperand(MCOperand::createImm(add));
3945 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Val,
3946 uint64_t Address, const void *Decoder) {
3947 // Val is passed in as S:J1:J2:imm10H:imm10L:'0'
3948 // Note only one trailing zero not two. Also the J1 and J2 values are from
3949 // the encoded instruction. So here change to I1 and I2 values via:
3950 // I1 = NOT(J1 EOR S);
3951 // I2 = NOT(J2 EOR S);
3952 // and build the imm32 with two trailing zeros as documented:
3953 // imm32 = SignExtend(S:I1:I2:imm10H:imm10L:'00', 32);
3954 unsigned S = (Val >> 23) & 1;
3955 unsigned J1 = (Val >> 22) & 1;
3956 unsigned J2 = (Val >> 21) & 1;
3957 unsigned I1 = !(J1 ^ S);
3958 unsigned I2 = !(J2 ^ S);
3959 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
3960 int imm32 = SignExtend32<25>(tmp << 1);
3962 if (!tryAddingSymbolicOperand(Address,
3963 (Address & ~2u) + imm32 + 4,
3964 true, 4, Inst, Decoder))
3965 Inst.addOperand(MCOperand::createImm(imm32));
3966 return MCDisassembler::Success;
3969 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Val,
3970 uint64_t Address, const void *Decoder) {
3971 if (Val == 0xA || Val == 0xB)
3972 return MCDisassembler::Fail;
3974 const FeatureBitset &featureBits =
3975 ((const MCDisassembler*)Decoder)->getSubtargetInfo().getFeatureBits();
3977 if (featureBits[ARM::HasV8Ops] && !(Val == 14 || Val == 15))
3978 return MCDisassembler::Fail;
3980 Inst.addOperand(MCOperand::createImm(Val));
3981 return MCDisassembler::Success;
3985 DecodeThumbTableBranch(MCInst &Inst, unsigned Insn,
3986 uint64_t Address, const void *Decoder) {
3987 DecodeStatus S = MCDisassembler::Success;
3989 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3990 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3992 if (Rn == ARM::SP) S = MCDisassembler::SoftFail;
3993 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3994 return MCDisassembler::Fail;
3995 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3996 return MCDisassembler::Fail;
4001 DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Insn,
4002 uint64_t Address, const void *Decoder) {
4003 DecodeStatus S = MCDisassembler::Success;
4005 unsigned pred = fieldFromInstruction(Insn, 22, 4);
4006 if (pred == 0xE || pred == 0xF) {
4007 unsigned opc = fieldFromInstruction(Insn, 4, 28);
4010 return MCDisassembler::Fail;
4012 Inst.setOpcode(ARM::t2DSB);
4015 Inst.setOpcode(ARM::t2DMB);
4018 Inst.setOpcode(ARM::t2ISB);
4022 unsigned imm = fieldFromInstruction(Insn, 0, 4);
4023 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
4026 unsigned brtarget = fieldFromInstruction(Insn, 0, 11) << 1;
4027 brtarget |= fieldFromInstruction(Insn, 11, 1) << 19;
4028 brtarget |= fieldFromInstruction(Insn, 13, 1) << 18;
4029 brtarget |= fieldFromInstruction(Insn, 16, 6) << 12;
4030 brtarget |= fieldFromInstruction(Insn, 26, 1) << 20;
4032 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
4033 return MCDisassembler::Fail;
4034 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4035 return MCDisassembler::Fail;
4040 // Decode a shifted immediate operand. These basically consist
4041 // of an 8-bit value, and a 4-bit directive that specifies either
4042 // a splat operation or a rotation.
4043 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
4044 uint64_t Address, const void *Decoder) {
4045 unsigned ctrl = fieldFromInstruction(Val, 10, 2);
4047 unsigned byte = fieldFromInstruction(Val, 8, 2);
4048 unsigned imm = fieldFromInstruction(Val, 0, 8);
4051 Inst.addOperand(MCOperand::createImm(imm));
4054 Inst.addOperand(MCOperand::createImm((imm << 16) | imm));
4057 Inst.addOperand(MCOperand::createImm((imm << 24) | (imm << 8)));
4060 Inst.addOperand(MCOperand::createImm((imm << 24) | (imm << 16) |
4065 unsigned unrot = fieldFromInstruction(Val, 0, 7) | 0x80;
4066 unsigned rot = fieldFromInstruction(Val, 7, 5);
4067 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
4068 Inst.addOperand(MCOperand::createImm(imm));
4071 return MCDisassembler::Success;
4075 DecodeThumbBCCTargetOperand(MCInst &Inst, unsigned Val,
4076 uint64_t Address, const void *Decoder){
4077 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<9>(Val<<1) + 4,
4078 true, 2, Inst, Decoder))
4079 Inst.addOperand(MCOperand::createImm(SignExtend32<9>(Val << 1)));
4080 return MCDisassembler::Success;
4083 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
4084 uint64_t Address, const void *Decoder){
4085 // Val is passed in as S:J1:J2:imm10:imm11
4086 // Note no trailing zero after imm11. Also the J1 and J2 values are from
4087 // the encoded instruction. So here change to I1 and I2 values via:
4088 // I1 = NOT(J1 EOR S);
4089 // I2 = NOT(J2 EOR S);
4090 // and build the imm32 with one trailing zero as documented:
4091 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
4092 unsigned S = (Val >> 23) & 1;
4093 unsigned J1 = (Val >> 22) & 1;
4094 unsigned J2 = (Val >> 21) & 1;
4095 unsigned I1 = !(J1 ^ S);
4096 unsigned I2 = !(J2 ^ S);
4097 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
4098 int imm32 = SignExtend32<25>(tmp << 1);
4100 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
4101 true, 4, Inst, Decoder))
4102 Inst.addOperand(MCOperand::createImm(imm32));
4103 return MCDisassembler::Success;
4106 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Val,
4107 uint64_t Address, const void *Decoder) {
4109 return MCDisassembler::Fail;
4111 Inst.addOperand(MCOperand::createImm(Val));
4112 return MCDisassembler::Success;
4115 static DecodeStatus DecodeInstSyncBarrierOption(MCInst &Inst, unsigned Val,
4116 uint64_t Address, const void *Decoder) {
4118 return MCDisassembler::Fail;
4120 Inst.addOperand(MCOperand::createImm(Val));
4121 return MCDisassembler::Success;
4124 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Val,
4125 uint64_t Address, const void *Decoder) {
4126 DecodeStatus S = MCDisassembler::Success;
4127 const FeatureBitset &FeatureBits =
4128 ((const MCDisassembler*)Decoder)->getSubtargetInfo().getFeatureBits();
4130 if (FeatureBits[ARM::FeatureMClass]) {
4131 unsigned ValLow = Val & 0xff;
4133 // Validate the SYSm value first.
4148 case 18: // basepri_max
4149 case 19: // faultmask
4150 if (!(FeatureBits[ARM::HasV7Ops]))
4151 // Values basepri, basepri_max and faultmask are only valid for v7m.
4152 return MCDisassembler::Fail;
4154 case 0x8a: // msplim_ns
4155 case 0x8b: // psplim_ns
4156 case 0x91: // basepri_ns
4157 case 0x92: // basepri_max_ns
4158 case 0x93: // faultmask_ns
4159 if (!(FeatureBits[ARM::HasV8MMainlineOps]))
4160 return MCDisassembler::Fail;
4164 case 0x88: // msp_ns
4165 case 0x89: // psp_ns
4166 case 0x90: // primask_ns
4167 case 0x94: // control_ns
4169 if (!(FeatureBits[ARM::Feature8MSecExt]))
4170 return MCDisassembler::Fail;
4173 return MCDisassembler::Fail;
4176 if (Inst.getOpcode() == ARM::t2MSR_M) {
4177 unsigned Mask = fieldFromInstruction(Val, 10, 2);
4178 if (!(FeatureBits[ARM::HasV7Ops])) {
4179 // The ARMv6-M MSR bits {11-10} can be only 0b10, other values are
4182 S = MCDisassembler::SoftFail;
4185 // The ARMv7-M architecture stores an additional 2-bit mask value in
4186 // MSR bits {11-10}. The mask is used only with apsr, iapsr, eapsr and
4187 // xpsr, it has to be 0b10 in other cases. Bit mask{1} indicates if
4188 // the NZCVQ bits should be moved by the instruction. Bit mask{0}
4189 // indicates the move for the GE{3:0} bits, the mask{0} bit can be set
4190 // only if the processor includes the DSP extension.
4191 if (Mask == 0 || (Mask != 2 && ValLow > 3) ||
4192 (!(FeatureBits[ARM::FeatureDSP]) && (Mask & 1)))
4193 S = MCDisassembler::SoftFail;
4199 return MCDisassembler::Fail;
4201 Inst.addOperand(MCOperand::createImm(Val));
4205 static DecodeStatus DecodeBankedReg(MCInst &Inst, unsigned Val,
4206 uint64_t Address, const void *Decoder) {
4208 unsigned R = fieldFromInstruction(Val, 5, 1);
4209 unsigned SysM = fieldFromInstruction(Val, 0, 5);
4211 // The table of encodings for these banked registers comes from B9.2.3 of the
4212 // ARM ARM. There are patterns, but nothing regular enough to make this logic
4213 // neater. So by fiat, these values are UNPREDICTABLE:
4215 if (SysM == 0x7 || SysM == 0xf || SysM == 0x18 || SysM == 0x19 ||
4216 SysM == 0x1a || SysM == 0x1b)
4217 return MCDisassembler::SoftFail;
4219 if (SysM != 0xe && SysM != 0x10 && SysM != 0x12 && SysM != 0x14 &&
4220 SysM != 0x16 && SysM != 0x1c && SysM != 0x1e)
4221 return MCDisassembler::SoftFail;
4224 Inst.addOperand(MCOperand::createImm(Val));
4225 return MCDisassembler::Success;
4228 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
4229 uint64_t Address, const void *Decoder) {
4230 DecodeStatus S = MCDisassembler::Success;
4232 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4233 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4234 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4237 S = MCDisassembler::SoftFail;
4239 if (!Check(S, DecodeGPRPairRegisterClass(Inst, Rt, Address, Decoder)))
4240 return MCDisassembler::Fail;
4241 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4242 return MCDisassembler::Fail;
4243 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4244 return MCDisassembler::Fail;
4249 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
4250 uint64_t Address, const void *Decoder){
4251 DecodeStatus S = MCDisassembler::Success;
4253 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4254 unsigned Rt = fieldFromInstruction(Insn, 0, 4);
4255 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4256 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4258 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
4259 return MCDisassembler::Fail;
4261 if (Rn == 0xF || Rd == Rn || Rd == Rt || Rd == Rt+1)
4262 S = MCDisassembler::SoftFail;
4264 if (!Check(S, DecodeGPRPairRegisterClass(Inst, Rt, Address, Decoder)))
4265 return MCDisassembler::Fail;
4266 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4267 return MCDisassembler::Fail;
4268 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4269 return MCDisassembler::Fail;
4274 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
4275 uint64_t Address, const void *Decoder) {
4276 DecodeStatus S = MCDisassembler::Success;
4278 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4279 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4280 unsigned imm = fieldFromInstruction(Insn, 0, 12);
4281 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
4282 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
4283 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4285 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
4287 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
4288 return MCDisassembler::Fail;
4289 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4290 return MCDisassembler::Fail;
4291 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
4292 return MCDisassembler::Fail;
4293 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4294 return MCDisassembler::Fail;
4299 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
4300 uint64_t Address, const void *Decoder) {
4301 DecodeStatus S = MCDisassembler::Success;
4303 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4304 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4305 unsigned imm = fieldFromInstruction(Insn, 0, 12);
4306 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
4307 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
4308 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4309 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4311 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
4312 if (Rm == 0xF) S = MCDisassembler::SoftFail;
4314 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
4315 return MCDisassembler::Fail;
4316 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4317 return MCDisassembler::Fail;
4318 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
4319 return MCDisassembler::Fail;
4320 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4321 return MCDisassembler::Fail;
4327 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
4328 uint64_t Address, const void *Decoder) {
4329 DecodeStatus S = MCDisassembler::Success;
4331 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4332 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4333 unsigned imm = fieldFromInstruction(Insn, 0, 12);
4334 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
4335 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
4336 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4338 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
4340 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4341 return MCDisassembler::Fail;
4342 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
4343 return MCDisassembler::Fail;
4344 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
4345 return MCDisassembler::Fail;
4346 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4347 return MCDisassembler::Fail;
4352 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
4353 uint64_t Address, const void *Decoder) {
4354 DecodeStatus S = MCDisassembler::Success;
4356 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4357 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4358 unsigned imm = fieldFromInstruction(Insn, 0, 12);
4359 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
4360 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
4361 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4363 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
4365 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4366 return MCDisassembler::Fail;
4367 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
4368 return MCDisassembler::Fail;
4369 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
4370 return MCDisassembler::Fail;
4371 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4372 return MCDisassembler::Fail;
4377 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
4378 uint64_t Address, const void *Decoder) {
4379 DecodeStatus S = MCDisassembler::Success;
4381 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4382 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4383 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4384 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4385 unsigned size = fieldFromInstruction(Insn, 10, 2);
4391 return MCDisassembler::Fail;
4393 if (fieldFromInstruction(Insn, 4, 1))
4394 return MCDisassembler::Fail; // UNDEFINED
4395 index = fieldFromInstruction(Insn, 5, 3);
4398 if (fieldFromInstruction(Insn, 5, 1))
4399 return MCDisassembler::Fail; // UNDEFINED
4400 index = fieldFromInstruction(Insn, 6, 2);
4401 if (fieldFromInstruction(Insn, 4, 1))
4405 if (fieldFromInstruction(Insn, 6, 1))
4406 return MCDisassembler::Fail; // UNDEFINED
4407 index = fieldFromInstruction(Insn, 7, 1);
4409 switch (fieldFromInstruction(Insn, 4, 2)) {
4415 return MCDisassembler::Fail;
4420 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4421 return MCDisassembler::Fail;
4422 if (Rm != 0xF) { // Writeback
4423 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4424 return MCDisassembler::Fail;
4426 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4427 return MCDisassembler::Fail;
4428 Inst.addOperand(MCOperand::createImm(align));
4431 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4432 return MCDisassembler::Fail;
4434 Inst.addOperand(MCOperand::createReg(0));
4437 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4438 return MCDisassembler::Fail;
4439 Inst.addOperand(MCOperand::createImm(index));
4444 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
4445 uint64_t Address, const void *Decoder) {
4446 DecodeStatus S = MCDisassembler::Success;
4448 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4449 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4450 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4451 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4452 unsigned size = fieldFromInstruction(Insn, 10, 2);
4458 return MCDisassembler::Fail;
4460 if (fieldFromInstruction(Insn, 4, 1))
4461 return MCDisassembler::Fail; // UNDEFINED
4462 index = fieldFromInstruction(Insn, 5, 3);
4465 if (fieldFromInstruction(Insn, 5, 1))
4466 return MCDisassembler::Fail; // UNDEFINED
4467 index = fieldFromInstruction(Insn, 6, 2);
4468 if (fieldFromInstruction(Insn, 4, 1))
4472 if (fieldFromInstruction(Insn, 6, 1))
4473 return MCDisassembler::Fail; // UNDEFINED
4474 index = fieldFromInstruction(Insn, 7, 1);
4476 switch (fieldFromInstruction(Insn, 4, 2)) {
4482 return MCDisassembler::Fail;
4487 if (Rm != 0xF) { // Writeback
4488 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4489 return MCDisassembler::Fail;
4491 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4492 return MCDisassembler::Fail;
4493 Inst.addOperand(MCOperand::createImm(align));
4496 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4497 return MCDisassembler::Fail;
4499 Inst.addOperand(MCOperand::createReg(0));
4502 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4503 return MCDisassembler::Fail;
4504 Inst.addOperand(MCOperand::createImm(index));
4510 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
4511 uint64_t Address, const void *Decoder) {
4512 DecodeStatus S = MCDisassembler::Success;
4514 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4515 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4516 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4517 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4518 unsigned size = fieldFromInstruction(Insn, 10, 2);
4525 return MCDisassembler::Fail;
4527 index = fieldFromInstruction(Insn, 5, 3);
4528 if (fieldFromInstruction(Insn, 4, 1))
4532 index = fieldFromInstruction(Insn, 6, 2);
4533 if (fieldFromInstruction(Insn, 4, 1))
4535 if (fieldFromInstruction(Insn, 5, 1))
4539 if (fieldFromInstruction(Insn, 5, 1))
4540 return MCDisassembler::Fail; // UNDEFINED
4541 index = fieldFromInstruction(Insn, 7, 1);
4542 if (fieldFromInstruction(Insn, 4, 1) != 0)
4544 if (fieldFromInstruction(Insn, 6, 1))
4549 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4550 return MCDisassembler::Fail;
4551 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4552 return MCDisassembler::Fail;
4553 if (Rm != 0xF) { // Writeback
4554 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4555 return MCDisassembler::Fail;
4557 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4558 return MCDisassembler::Fail;
4559 Inst.addOperand(MCOperand::createImm(align));
4562 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4563 return MCDisassembler::Fail;
4565 Inst.addOperand(MCOperand::createReg(0));
4568 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4569 return MCDisassembler::Fail;
4570 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4571 return MCDisassembler::Fail;
4572 Inst.addOperand(MCOperand::createImm(index));
4577 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
4578 uint64_t Address, const void *Decoder) {
4579 DecodeStatus S = MCDisassembler::Success;
4581 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4582 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4583 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4584 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4585 unsigned size = fieldFromInstruction(Insn, 10, 2);
4592 return MCDisassembler::Fail;
4594 index = fieldFromInstruction(Insn, 5, 3);
4595 if (fieldFromInstruction(Insn, 4, 1))
4599 index = fieldFromInstruction(Insn, 6, 2);
4600 if (fieldFromInstruction(Insn, 4, 1))
4602 if (fieldFromInstruction(Insn, 5, 1))
4606 if (fieldFromInstruction(Insn, 5, 1))
4607 return MCDisassembler::Fail; // UNDEFINED
4608 index = fieldFromInstruction(Insn, 7, 1);
4609 if (fieldFromInstruction(Insn, 4, 1) != 0)
4611 if (fieldFromInstruction(Insn, 6, 1))
4616 if (Rm != 0xF) { // Writeback
4617 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4618 return MCDisassembler::Fail;
4620 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4621 return MCDisassembler::Fail;
4622 Inst.addOperand(MCOperand::createImm(align));
4625 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4626 return MCDisassembler::Fail;
4628 Inst.addOperand(MCOperand::createReg(0));
4631 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4632 return MCDisassembler::Fail;
4633 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4634 return MCDisassembler::Fail;
4635 Inst.addOperand(MCOperand::createImm(index));
4641 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
4642 uint64_t Address, const void *Decoder) {
4643 DecodeStatus S = MCDisassembler::Success;
4645 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4646 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4647 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4648 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4649 unsigned size = fieldFromInstruction(Insn, 10, 2);
4656 return MCDisassembler::Fail;
4658 if (fieldFromInstruction(Insn, 4, 1))
4659 return MCDisassembler::Fail; // UNDEFINED
4660 index = fieldFromInstruction(Insn, 5, 3);
4663 if (fieldFromInstruction(Insn, 4, 1))
4664 return MCDisassembler::Fail; // UNDEFINED
4665 index = fieldFromInstruction(Insn, 6, 2);
4666 if (fieldFromInstruction(Insn, 5, 1))
4670 if (fieldFromInstruction(Insn, 4, 2))
4671 return MCDisassembler::Fail; // UNDEFINED
4672 index = fieldFromInstruction(Insn, 7, 1);
4673 if (fieldFromInstruction(Insn, 6, 1))
4678 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4679 return MCDisassembler::Fail;
4680 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4681 return MCDisassembler::Fail;
4682 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4683 return MCDisassembler::Fail;
4685 if (Rm != 0xF) { // Writeback
4686 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4687 return MCDisassembler::Fail;
4689 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4690 return MCDisassembler::Fail;
4691 Inst.addOperand(MCOperand::createImm(align));
4694 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4695 return MCDisassembler::Fail;
4697 Inst.addOperand(MCOperand::createReg(0));
4700 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4701 return MCDisassembler::Fail;
4702 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4703 return MCDisassembler::Fail;
4704 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4705 return MCDisassembler::Fail;
4706 Inst.addOperand(MCOperand::createImm(index));
4711 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
4712 uint64_t Address, const void *Decoder) {
4713 DecodeStatus S = MCDisassembler::Success;
4715 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4716 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4717 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4718 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4719 unsigned size = fieldFromInstruction(Insn, 10, 2);
4726 return MCDisassembler::Fail;
4728 if (fieldFromInstruction(Insn, 4, 1))
4729 return MCDisassembler::Fail; // UNDEFINED
4730 index = fieldFromInstruction(Insn, 5, 3);
4733 if (fieldFromInstruction(Insn, 4, 1))
4734 return MCDisassembler::Fail; // UNDEFINED
4735 index = fieldFromInstruction(Insn, 6, 2);
4736 if (fieldFromInstruction(Insn, 5, 1))
4740 if (fieldFromInstruction(Insn, 4, 2))
4741 return MCDisassembler::Fail; // UNDEFINED
4742 index = fieldFromInstruction(Insn, 7, 1);
4743 if (fieldFromInstruction(Insn, 6, 1))
4748 if (Rm != 0xF) { // Writeback
4749 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4750 return MCDisassembler::Fail;
4752 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4753 return MCDisassembler::Fail;
4754 Inst.addOperand(MCOperand::createImm(align));
4757 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4758 return MCDisassembler::Fail;
4760 Inst.addOperand(MCOperand::createReg(0));
4763 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4764 return MCDisassembler::Fail;
4765 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4766 return MCDisassembler::Fail;
4767 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4768 return MCDisassembler::Fail;
4769 Inst.addOperand(MCOperand::createImm(index));
4775 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
4776 uint64_t Address, const void *Decoder) {
4777 DecodeStatus S = MCDisassembler::Success;
4779 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4780 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4781 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4782 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4783 unsigned size = fieldFromInstruction(Insn, 10, 2);
4790 return MCDisassembler::Fail;
4792 if (fieldFromInstruction(Insn, 4, 1))
4794 index = fieldFromInstruction(Insn, 5, 3);
4797 if (fieldFromInstruction(Insn, 4, 1))
4799 index = fieldFromInstruction(Insn, 6, 2);
4800 if (fieldFromInstruction(Insn, 5, 1))
4804 switch (fieldFromInstruction(Insn, 4, 2)) {
4808 return MCDisassembler::Fail;
4810 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4813 index = fieldFromInstruction(Insn, 7, 1);
4814 if (fieldFromInstruction(Insn, 6, 1))
4819 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4820 return MCDisassembler::Fail;
4821 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4822 return MCDisassembler::Fail;
4823 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4824 return MCDisassembler::Fail;
4825 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4826 return MCDisassembler::Fail;
4828 if (Rm != 0xF) { // Writeback
4829 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4830 return MCDisassembler::Fail;
4832 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4833 return MCDisassembler::Fail;
4834 Inst.addOperand(MCOperand::createImm(align));
4837 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4838 return MCDisassembler::Fail;
4840 Inst.addOperand(MCOperand::createReg(0));
4843 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4844 return MCDisassembler::Fail;
4845 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4846 return MCDisassembler::Fail;
4847 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4848 return MCDisassembler::Fail;
4849 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4850 return MCDisassembler::Fail;
4851 Inst.addOperand(MCOperand::createImm(index));
4856 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
4857 uint64_t Address, const void *Decoder) {
4858 DecodeStatus S = MCDisassembler::Success;
4860 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4861 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4862 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4863 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4864 unsigned size = fieldFromInstruction(Insn, 10, 2);
4871 return MCDisassembler::Fail;
4873 if (fieldFromInstruction(Insn, 4, 1))
4875 index = fieldFromInstruction(Insn, 5, 3);
4878 if (fieldFromInstruction(Insn, 4, 1))
4880 index = fieldFromInstruction(Insn, 6, 2);
4881 if (fieldFromInstruction(Insn, 5, 1))
4885 switch (fieldFromInstruction(Insn, 4, 2)) {
4889 return MCDisassembler::Fail;
4891 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4894 index = fieldFromInstruction(Insn, 7, 1);
4895 if (fieldFromInstruction(Insn, 6, 1))
4900 if (Rm != 0xF) { // Writeback
4901 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4902 return MCDisassembler::Fail;
4904 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4905 return MCDisassembler::Fail;
4906 Inst.addOperand(MCOperand::createImm(align));
4909 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4910 return MCDisassembler::Fail;
4912 Inst.addOperand(MCOperand::createReg(0));
4915 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4916 return MCDisassembler::Fail;
4917 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4918 return MCDisassembler::Fail;
4919 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4920 return MCDisassembler::Fail;
4921 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4922 return MCDisassembler::Fail;
4923 Inst.addOperand(MCOperand::createImm(index));
4928 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
4929 uint64_t Address, const void *Decoder) {
4930 DecodeStatus S = MCDisassembler::Success;
4931 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4932 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4933 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4934 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4935 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4937 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4938 S = MCDisassembler::SoftFail;
4940 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4941 return MCDisassembler::Fail;
4942 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4943 return MCDisassembler::Fail;
4944 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4945 return MCDisassembler::Fail;
4946 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4947 return MCDisassembler::Fail;
4948 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4949 return MCDisassembler::Fail;
4954 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
4955 uint64_t Address, const void *Decoder) {
4956 DecodeStatus S = MCDisassembler::Success;
4957 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4958 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4959 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4960 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4961 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4963 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4964 S = MCDisassembler::SoftFail;
4966 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4967 return MCDisassembler::Fail;
4968 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4969 return MCDisassembler::Fail;
4970 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4971 return MCDisassembler::Fail;
4972 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4973 return MCDisassembler::Fail;
4974 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4975 return MCDisassembler::Fail;
4980 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Insn,
4981 uint64_t Address, const void *Decoder) {
4982 DecodeStatus S = MCDisassembler::Success;
4983 unsigned pred = fieldFromInstruction(Insn, 4, 4);
4984 unsigned mask = fieldFromInstruction(Insn, 0, 4);
4988 S = MCDisassembler::SoftFail;
4992 return MCDisassembler::Fail;
4994 Inst.addOperand(MCOperand::createImm(pred));
4995 Inst.addOperand(MCOperand::createImm(mask));
5000 DecodeT2LDRDPreInstruction(MCInst &Inst, unsigned Insn,
5001 uint64_t Address, const void *Decoder) {
5002 DecodeStatus S = MCDisassembler::Success;
5004 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
5005 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
5006 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
5007 unsigned addr = fieldFromInstruction(Insn, 0, 8);
5008 unsigned W = fieldFromInstruction(Insn, 21, 1);
5009 unsigned U = fieldFromInstruction(Insn, 23, 1);
5010 unsigned P = fieldFromInstruction(Insn, 24, 1);
5011 bool writeback = (W == 1) | (P == 0);
5013 addr |= (U << 8) | (Rn << 9);
5015 if (writeback && (Rn == Rt || Rn == Rt2))
5016 Check(S, MCDisassembler::SoftFail);
5018 Check(S, MCDisassembler::SoftFail);
5021 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
5022 return MCDisassembler::Fail;
5024 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
5025 return MCDisassembler::Fail;
5026 // Writeback operand
5027 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
5028 return MCDisassembler::Fail;
5030 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
5031 return MCDisassembler::Fail;
5037 DecodeT2STRDPreInstruction(MCInst &Inst, unsigned Insn,
5038 uint64_t Address, const void *Decoder) {
5039 DecodeStatus S = MCDisassembler::Success;
5041 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
5042 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
5043 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
5044 unsigned addr = fieldFromInstruction(Insn, 0, 8);
5045 unsigned W = fieldFromInstruction(Insn, 21, 1);
5046 unsigned U = fieldFromInstruction(Insn, 23, 1);
5047 unsigned P = fieldFromInstruction(Insn, 24, 1);
5048 bool writeback = (W == 1) | (P == 0);
5050 addr |= (U << 8) | (Rn << 9);
5052 if (writeback && (Rn == Rt || Rn == Rt2))
5053 Check(S, MCDisassembler::SoftFail);
5055 // Writeback operand
5056 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
5057 return MCDisassembler::Fail;
5059 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
5060 return MCDisassembler::Fail;
5062 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
5063 return MCDisassembler::Fail;
5065 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
5066 return MCDisassembler::Fail;
5071 static DecodeStatus DecodeT2Adr(MCInst &Inst, uint32_t Insn,
5072 uint64_t Address, const void *Decoder) {
5073 unsigned sign1 = fieldFromInstruction(Insn, 21, 1);
5074 unsigned sign2 = fieldFromInstruction(Insn, 23, 1);
5075 if (sign1 != sign2) return MCDisassembler::Fail;
5077 unsigned Val = fieldFromInstruction(Insn, 0, 8);
5078 Val |= fieldFromInstruction(Insn, 12, 3) << 8;
5079 Val |= fieldFromInstruction(Insn, 26, 1) << 11;
5081 Inst.addOperand(MCOperand::createImm(SignExtend32<13>(Val)));
5083 return MCDisassembler::Success;
5086 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, uint32_t Val,
5088 const void *Decoder) {
5089 DecodeStatus S = MCDisassembler::Success;
5091 // Shift of "asr #32" is not allowed in Thumb2 mode.
5092 if (Val == 0x20) S = MCDisassembler::Fail;
5093 Inst.addOperand(MCOperand::createImm(Val));
5097 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
5098 uint64_t Address, const void *Decoder) {
5099 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
5100 unsigned Rt2 = fieldFromInstruction(Insn, 0, 4);
5101 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
5102 unsigned pred = fieldFromInstruction(Insn, 28, 4);
5105 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
5107 DecodeStatus S = MCDisassembler::Success;
5109 if (Rt == Rn || Rn == Rt2)
5110 S = MCDisassembler::SoftFail;
5112 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
5113 return MCDisassembler::Fail;
5114 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
5115 return MCDisassembler::Fail;
5116 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
5117 return MCDisassembler::Fail;
5118 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
5119 return MCDisassembler::Fail;
5124 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
5125 uint64_t Address, const void *Decoder) {
5126 const FeatureBitset &featureBits =
5127 ((const MCDisassembler *)Decoder)->getSubtargetInfo().getFeatureBits();
5128 bool hasFullFP16 = featureBits[ARM::FeatureFullFP16];
5130 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
5131 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
5132 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
5133 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
5134 unsigned imm = fieldFromInstruction(Insn, 16, 6);
5135 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
5136 unsigned op = fieldFromInstruction(Insn, 5, 1);
5138 DecodeStatus S = MCDisassembler::Success;
5140 // If the top 3 bits of imm are clear, this is a VMOV (immediate)
5141 if (!(imm & 0x38)) {
5143 if (op == 1) return MCDisassembler::Fail;
5144 Inst.setOpcode(ARM::VMOVv2f32);
5149 Inst.setOpcode(ARM::VMOVv1i64);
5151 Inst.setOpcode(ARM::VMOVv8i8);
5156 Inst.setOpcode(ARM::VMVNv2i32);
5158 Inst.setOpcode(ARM::VMOVv2i32);
5163 Inst.setOpcode(ARM::VMVNv2i32);
5165 Inst.setOpcode(ARM::VMOVv2i32);
5169 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
5172 if (!(imm & 0x20)) return MCDisassembler::Fail;
5174 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
5175 return MCDisassembler::Fail;
5176 if (!Check(S, DecodeDPRRegisterClass(Inst, Vm, Address, Decoder)))
5177 return MCDisassembler::Fail;
5178 Inst.addOperand(MCOperand::createImm(64 - imm));
5183 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
5184 uint64_t Address, const void *Decoder) {
5185 const FeatureBitset &featureBits =
5186 ((const MCDisassembler *)Decoder)->getSubtargetInfo().getFeatureBits();
5187 bool hasFullFP16 = featureBits[ARM::FeatureFullFP16];
5189 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
5190 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
5191 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
5192 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
5193 unsigned imm = fieldFromInstruction(Insn, 16, 6);
5194 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
5195 unsigned op = fieldFromInstruction(Insn, 5, 1);
5197 DecodeStatus S = MCDisassembler::Success;
5199 // If the top 3 bits of imm are clear, this is a VMOV (immediate)
5200 if (!(imm & 0x38)) {
5202 if (op == 1) return MCDisassembler::Fail;
5203 Inst.setOpcode(ARM::VMOVv4f32);
5208 Inst.setOpcode(ARM::VMOVv2i64);
5210 Inst.setOpcode(ARM::VMOVv16i8);
5215 Inst.setOpcode(ARM::VMVNv4i32);
5217 Inst.setOpcode(ARM::VMOVv4i32);
5222 Inst.setOpcode(ARM::VMVNv4i32);
5224 Inst.setOpcode(ARM::VMOVv4i32);
5228 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
5231 if (!(imm & 0x20)) return MCDisassembler::Fail;
5233 if (!Check(S, DecodeQPRRegisterClass(Inst, Vd, Address, Decoder)))
5234 return MCDisassembler::Fail;
5235 if (!Check(S, DecodeQPRRegisterClass(Inst, Vm, Address, Decoder)))
5236 return MCDisassembler::Fail;
5237 Inst.addOperand(MCOperand::createImm(64 - imm));
5242 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
5243 uint64_t Address, const void *Decoder) {
5244 DecodeStatus S = MCDisassembler::Success;
5246 unsigned Rn = fieldFromInstruction(Val, 16, 4);
5247 unsigned Rt = fieldFromInstruction(Val, 12, 4);
5248 unsigned Rm = fieldFromInstruction(Val, 0, 4);
5249 Rm |= (fieldFromInstruction(Val, 23, 1) << 4);
5250 unsigned Cond = fieldFromInstruction(Val, 28, 4);
5252 if (fieldFromInstruction(Val, 8, 4) != 0 || Rn == Rt)
5253 S = MCDisassembler::SoftFail;
5255 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
5256 return MCDisassembler::Fail;
5257 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
5258 return MCDisassembler::Fail;
5259 if (!Check(S, DecodeAddrMode7Operand(Inst, Rn, Address, Decoder)))
5260 return MCDisassembler::Fail;
5261 if (!Check(S, DecodePostIdxReg(Inst, Rm, Address, Decoder)))
5262 return MCDisassembler::Fail;
5263 if (!Check(S, DecodePredicateOperand(Inst, Cond, Address, Decoder)))
5264 return MCDisassembler::Fail;
5269 static DecodeStatus DecoderForMRRC2AndMCRR2(llvm::MCInst &Inst, unsigned Val,
5270 uint64_t Address, const void *Decoder) {
5272 DecodeStatus S = MCDisassembler::Success;
5274 unsigned CRm = fieldFromInstruction(Val, 0, 4);
5275 unsigned opc1 = fieldFromInstruction(Val, 4, 4);
5276 unsigned cop = fieldFromInstruction(Val, 8, 4);
5277 unsigned Rt = fieldFromInstruction(Val, 12, 4);
5278 unsigned Rt2 = fieldFromInstruction(Val, 16, 4);
5280 if ((cop & ~0x1) == 0xa)
5281 return MCDisassembler::Fail;
5284 S = MCDisassembler::SoftFail;
5286 // We have to check if the instruction is MRRC2
5287 // or MCRR2 when constructing the operands for
5288 // Inst. Reason is because MRRC2 stores to two
5289 // registers so it's tablegen desc has has two
5290 // outputs whereas MCRR doesn't store to any
5291 // registers so all of it's operands are listed
5292 // as inputs, therefore the operand order for
5293 // MRRC2 needs to be [Rt, Rt2, cop, opc1, CRm]
5294 // and MCRR2 operand order is [cop, opc1, Rt, Rt2, CRm]
5296 if (Inst.getOpcode() == ARM::MRRC2) {
5297 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
5298 return MCDisassembler::Fail;
5299 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
5300 return MCDisassembler::Fail;
5302 Inst.addOperand(MCOperand::createImm(cop));
5303 Inst.addOperand(MCOperand::createImm(opc1));
5304 if (Inst.getOpcode() == ARM::MCRR2) {
5305 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
5306 return MCDisassembler::Fail;
5307 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
5308 return MCDisassembler::Fail;
5310 Inst.addOperand(MCOperand::createImm(CRm));