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.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) {
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() {}
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 DecodeSOImmOperand(MCInst &Inst, unsigned Val,
180 uint64_t Address, const void *Decoder);
181 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
182 uint64_t Address, const void *Decoder);
183 static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
184 uint64_t Address, const void *Decoder);
185 static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
186 uint64_t Address, const void *Decoder);
188 static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Insn,
189 uint64_t Address, const void *Decoder);
190 static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
191 uint64_t Address, const void *Decoder);
192 static DecodeStatus DecodeAddrMode2IdxInstruction(MCInst &Inst,
195 const void *Decoder);
196 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Insn,
197 uint64_t Address, const void *Decoder);
198 static DecodeStatus DecodeAddrMode3Instruction(MCInst &Inst,unsigned Insn,
199 uint64_t Address, const void *Decoder);
200 static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Insn,
201 uint64_t Address, const void *Decoder);
202 static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Insn,
203 uint64_t Address, const void *Decoder);
205 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst & Inst,
208 const void *Decoder);
209 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
210 uint64_t Address, const void *Decoder);
211 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
212 uint64_t Address, const void *Decoder);
213 static DecodeStatus DecodeSMLAInstruction(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 DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
218 uint64_t Address, const void *Decoder);
219 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
220 uint64_t Address, const void *Decoder);
221 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
222 uint64_t Address, const void *Decoder);
223 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
224 uint64_t Address, const void *Decoder);
225 static DecodeStatus DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
226 uint64_t Address, const void *Decoder);
227 static DecodeStatus DecodeBranchImmInstruction(MCInst &Inst,unsigned Insn,
228 uint64_t Address, const void *Decoder);
229 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
230 uint64_t Address, const void *Decoder);
231 static DecodeStatus DecodeVLDST1Instruction(MCInst &Inst, unsigned Val,
232 uint64_t Address, const void *Decoder);
233 static DecodeStatus DecodeVLDST2Instruction(MCInst &Inst, unsigned Val,
234 uint64_t Address, const void *Decoder);
235 static DecodeStatus DecodeVLDST3Instruction(MCInst &Inst, unsigned Val,
236 uint64_t Address, const void *Decoder);
237 static DecodeStatus DecodeVLDST4Instruction(MCInst &Inst, unsigned Val,
238 uint64_t Address, const void *Decoder);
239 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Val,
240 uint64_t Address, const void *Decoder);
241 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Val,
242 uint64_t Address, const void *Decoder);
243 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Val,
244 uint64_t Address, const void *Decoder);
245 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Val,
246 uint64_t Address, const void *Decoder);
247 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Val,
248 uint64_t Address, const void *Decoder);
249 static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Val,
250 uint64_t Address, const void *Decoder);
251 static DecodeStatus DecodeNEONModImmInstruction(MCInst &Inst,unsigned Val,
252 uint64_t Address, const void *Decoder);
253 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Val,
254 uint64_t Address, const void *Decoder);
255 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
256 uint64_t Address, const void *Decoder);
257 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
258 uint64_t Address, const void *Decoder);
259 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
260 uint64_t Address, const void *Decoder);
261 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
262 uint64_t Address, const void *Decoder);
263 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
264 uint64_t Address, const void *Decoder);
265 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
266 uint64_t Address, const void *Decoder);
267 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Insn,
268 uint64_t Address, const void *Decoder);
269 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Insn,
270 uint64_t Address, const void *Decoder);
271 static DecodeStatus DecodeInstSyncBarrierOption(MCInst &Inst, unsigned Insn,
272 uint64_t Address, const void *Decoder);
273 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Insn,
274 uint64_t Address, const void *Decoder);
275 static DecodeStatus DecodeBankedReg(MCInst &Inst, unsigned Insn,
276 uint64_t Address, const void *Decoder);
277 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
278 uint64_t Address, const void *Decoder);
279 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
280 uint64_t Address, const void *Decoder);
281 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
282 uint64_t Address, const void *Decoder);
283 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
284 uint64_t Address, const void *Decoder);
285 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
286 uint64_t Address, const void *Decoder);
287 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
288 uint64_t Address, const void *Decoder);
289 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
290 uint64_t Address, const void *Decoder);
291 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
292 uint64_t Address, const void *Decoder);
293 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
294 uint64_t Address, const void *Decoder);
295 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
296 uint64_t Address, const void *Decoder);
297 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
298 uint64_t Address, const void *Decoder);
299 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
300 uint64_t Address, const void *Decoder);
301 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
302 uint64_t Address, const void *Decoder);
303 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
304 uint64_t Address, const void *Decoder);
305 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
306 uint64_t Address, const void *Decoder);
307 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
308 uint64_t Address, const void *Decoder);
309 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
310 uint64_t Address, const void *Decoder);
311 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
312 uint64_t Address, const void *Decoder);
313 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
314 uint64_t Address, const void *Decoder);
317 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
318 uint64_t Address, const void *Decoder);
319 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
320 uint64_t Address, const void *Decoder);
321 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
322 uint64_t Address, const void *Decoder);
323 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
324 uint64_t Address, const void *Decoder);
325 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
326 uint64_t Address, const void *Decoder);
327 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
328 uint64_t Address, const void *Decoder);
329 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
330 uint64_t Address, const void *Decoder);
331 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
332 uint64_t Address, const void *Decoder);
333 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
334 uint64_t Address, const void *Decoder);
335 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Val,
336 uint64_t Address, const void *Decoder);
337 static DecodeStatus DecodeT2LoadImm8(MCInst &Inst, unsigned Insn,
338 uint64_t Address, const void* Decoder);
339 static DecodeStatus DecodeT2LoadImm12(MCInst &Inst, unsigned Insn,
340 uint64_t Address, const void* Decoder);
341 static DecodeStatus DecodeT2LoadT(MCInst &Inst, unsigned Insn,
342 uint64_t Address, const void* Decoder);
343 static DecodeStatus DecodeT2LoadLabel(MCInst &Inst, unsigned Insn,
344 uint64_t Address, const void* Decoder);
345 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
346 uint64_t Address, const void *Decoder);
347 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
348 uint64_t Address, const void *Decoder);
349 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
350 uint64_t Address, const void *Decoder);
351 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
352 uint64_t Address, const void *Decoder);
353 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
354 uint64_t Address, const void *Decoder);
355 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Val,
356 uint64_t Address, const void *Decoder);
357 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
358 uint64_t Address, const void *Decoder);
359 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
360 uint64_t Address, const void *Decoder);
361 static DecodeStatus DecodeQADDInstruction(MCInst &Inst, unsigned Insn,
362 uint64_t Address, const void *Decoder);
363 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Insn,
364 uint64_t Address, const void *Decoder);
365 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
366 uint64_t Address, const void *Decoder);
367 static DecodeStatus DecodeThumbTableBranch(MCInst &Inst, unsigned Val,
368 uint64_t Address, const void *Decoder);
369 static DecodeStatus DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Val,
370 uint64_t Address, const void *Decoder);
371 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
372 uint64_t Address, const void *Decoder);
373 static DecodeStatus DecodeThumbBCCTargetOperand(MCInst &Inst,unsigned Val,
374 uint64_t Address, const void *Decoder);
375 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
376 uint64_t Address, const void *Decoder);
377 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Val,
378 uint64_t Address, const void *Decoder);
379 static DecodeStatus DecodeT2LDRDPreInstruction(MCInst &Inst,unsigned Insn,
380 uint64_t Address, const void *Decoder);
381 static DecodeStatus DecodeT2STRDPreInstruction(MCInst &Inst,unsigned Insn,
382 uint64_t Address, const void *Decoder);
383 static DecodeStatus DecodeT2Adr(MCInst &Inst, unsigned Val,
384 uint64_t Address, const void *Decoder);
385 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Val,
386 uint64_t Address, const void *Decoder);
387 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, unsigned Val,
388 uint64_t Address, const void *Decoder);
390 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
391 uint64_t Address, const void *Decoder);
392 static DecodeStatus DecodeMRRC2(llvm::MCInst &Inst, unsigned Val,
393 uint64_t Address, const void *Decoder);
394 #include "ARMGenDisassemblerTables.inc"
396 static MCDisassembler *createARMDisassembler(const Target &T,
397 const MCSubtargetInfo &STI,
399 return new ARMDisassembler(STI, Ctx);
402 static MCDisassembler *createThumbDisassembler(const Target &T,
403 const MCSubtargetInfo &STI,
405 return new ThumbDisassembler(STI, Ctx);
408 // Post-decoding checks
409 static DecodeStatus checkDecodedInstruction(MCInst &MI, uint64_t &Size,
410 uint64_t Address, raw_ostream &OS,
415 switch (MI.getOpcode()) {
417 // HVC is undefined if condition = 0xf otherwise upredictable
418 // if condition != 0xe
419 uint32_t Cond = (Insn >> 28) & 0xF;
421 return MCDisassembler::Fail;
423 return MCDisassembler::SoftFail;
426 default: return Result;
430 DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
431 ArrayRef<uint8_t> Bytes,
432 uint64_t Address, raw_ostream &OS,
433 raw_ostream &CS) const {
436 assert(!(STI.getFeatureBits() & ARM::ModeThumb) &&
437 "Asked to disassemble an ARM instruction but Subtarget is in Thumb "
440 // We want to read exactly 4 bytes of data.
441 if (Bytes.size() < 4) {
443 return MCDisassembler::Fail;
446 // Encoded as a small-endian 32-bit word in the stream.
448 (Bytes[3] << 24) | (Bytes[2] << 16) | (Bytes[1] << 8) | (Bytes[0] << 0);
450 // Calling the auto-generated decoder function.
451 DecodeStatus Result =
452 decodeInstruction(DecoderTableARM32, MI, Insn, Address, this, STI);
453 if (Result != MCDisassembler::Fail) {
455 return checkDecodedInstruction(MI, Size, Address, OS, CS, Insn, Result);
458 // VFP and NEON instructions, similarly, are shared between ARM
461 Result = decodeInstruction(DecoderTableVFP32, MI, Insn, Address, this, STI);
462 if (Result != MCDisassembler::Fail) {
468 Result = decodeInstruction(DecoderTableVFPV832, MI, Insn, Address, this, STI);
469 if (Result != MCDisassembler::Fail) {
476 decodeInstruction(DecoderTableNEONData32, MI, Insn, Address, this, STI);
477 if (Result != MCDisassembler::Fail) {
479 // Add a fake predicate operand, because we share these instruction
480 // definitions with Thumb2 where these instructions are predicable.
481 if (!DecodePredicateOperand(MI, 0xE, Address, this))
482 return MCDisassembler::Fail;
487 Result = decodeInstruction(DecoderTableNEONLoadStore32, MI, Insn, Address,
489 if (Result != MCDisassembler::Fail) {
491 // Add a fake predicate operand, because we share these instruction
492 // definitions with Thumb2 where these instructions are predicable.
493 if (!DecodePredicateOperand(MI, 0xE, Address, this))
494 return MCDisassembler::Fail;
500 decodeInstruction(DecoderTableNEONDup32, MI, Insn, Address, this, STI);
501 if (Result != MCDisassembler::Fail) {
503 // Add a fake predicate operand, because we share these instruction
504 // definitions with Thumb2 where these instructions are predicable.
505 if (!DecodePredicateOperand(MI, 0xE, Address, this))
506 return MCDisassembler::Fail;
512 decodeInstruction(DecoderTablev8NEON32, MI, Insn, Address, this, STI);
513 if (Result != MCDisassembler::Fail) {
520 decodeInstruction(DecoderTablev8Crypto32, MI, Insn, Address, this, STI);
521 if (Result != MCDisassembler::Fail) {
528 return MCDisassembler::Fail;
532 extern const MCInstrDesc ARMInsts[];
535 /// tryAddingSymbolicOperand - trys to add a symbolic operand in place of the
536 /// immediate Value in the MCInst. The immediate Value has had any PC
537 /// adjustment made by the caller. If the instruction is a branch instruction
538 /// then isBranch is true, else false. If the getOpInfo() function was set as
539 /// part of the setupForSymbolicDisassembly() call then that function is called
540 /// to get any symbolic information at the Address for this instruction. If
541 /// that returns non-zero then the symbolic information it returns is used to
542 /// create an MCExpr and that is added as an operand to the MCInst. If
543 /// getOpInfo() returns zero and isBranch is true then a symbol look up for
544 /// Value is done and if a symbol is found an MCExpr is created with that, else
545 /// an MCExpr with Value is created. This function returns true if it adds an
546 /// operand to the MCInst and false otherwise.
547 static bool tryAddingSymbolicOperand(uint64_t Address, int32_t Value,
548 bool isBranch, uint64_t InstSize,
549 MCInst &MI, const void *Decoder) {
550 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
551 // FIXME: Does it make sense for value to be negative?
552 return Dis->tryAddingSymbolicOperand(MI, (uint32_t)Value, Address, isBranch,
553 /* Offset */ 0, InstSize);
556 /// tryAddingPcLoadReferenceComment - trys to add a comment as to what is being
557 /// referenced by a load instruction with the base register that is the Pc.
558 /// These can often be values in a literal pool near the Address of the
559 /// instruction. The Address of the instruction and its immediate Value are
560 /// used as a possible literal pool entry. The SymbolLookUp call back will
561 /// return the name of a symbol referenced by the literal pool's entry if
562 /// the referenced address is that of a symbol. Or it will return a pointer to
563 /// a literal 'C' string if the referenced address of the literal pool's entry
564 /// is an address into a section with 'C' string literals.
565 static void tryAddingPcLoadReferenceComment(uint64_t Address, int Value,
566 const void *Decoder) {
567 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
568 Dis->tryAddingPcLoadReferenceComment(Value, Address);
571 // Thumb1 instructions don't have explicit S bits. Rather, they
572 // implicitly set CPSR. Since it's not represented in the encoding, the
573 // auto-generated decoder won't inject the CPSR operand. We need to fix
574 // that as a post-pass.
575 static void AddThumb1SBit(MCInst &MI, bool InITBlock) {
576 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
577 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
578 MCInst::iterator I = MI.begin();
579 for (unsigned i = 0; i < NumOps; ++i, ++I) {
580 if (I == MI.end()) break;
581 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) {
582 if (i > 0 && OpInfo[i-1].isPredicate()) continue;
583 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
588 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
591 // Most Thumb instructions don't have explicit predicates in the
592 // encoding, but rather get their predicates from IT context. We need
593 // to fix up the predicate operands using this context information as a
595 MCDisassembler::DecodeStatus
596 ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
597 MCDisassembler::DecodeStatus S = Success;
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())
623 // Some instructions (mostly unconditional branches) can
624 // only appears at the end of, or outside of, an IT.
625 if (ITBlock.instrInITBlock() && !ITBlock.instrLastInITBlock())
632 // If we're in an IT block, base the predicate on that. Otherwise,
633 // assume a predicate of AL.
635 CC = ITBlock.getITCC();
638 if (ITBlock.instrInITBlock())
639 ITBlock.advanceITState();
641 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
642 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
643 MCInst::iterator I = MI.begin();
644 for (unsigned i = 0; i < NumOps; ++i, ++I) {
645 if (I == MI.end()) break;
646 if (OpInfo[i].isPredicate()) {
647 I = MI.insert(I, MCOperand::CreateImm(CC));
650 MI.insert(I, MCOperand::CreateReg(0));
652 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
657 I = MI.insert(I, MCOperand::CreateImm(CC));
660 MI.insert(I, MCOperand::CreateReg(0));
662 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
667 // Thumb VFP instructions are a special case. Because we share their
668 // encodings between ARM and Thumb modes, and they are predicable in ARM
669 // mode, the auto-generated decoder will give them an (incorrect)
670 // predicate operand. We need to rewrite these operands based on the IT
671 // context as a post-pass.
672 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
674 CC = ITBlock.getITCC();
675 if (ITBlock.instrInITBlock())
676 ITBlock.advanceITState();
678 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
679 MCInst::iterator I = MI.begin();
680 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
681 for (unsigned i = 0; i < NumOps; ++i, ++I) {
682 if (OpInfo[i].isPredicate() ) {
688 I->setReg(ARM::CPSR);
694 DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
695 ArrayRef<uint8_t> Bytes,
698 raw_ostream &CS) const {
701 assert((STI.getFeatureBits() & ARM::ModeThumb) &&
702 "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!");
704 // We want to read exactly 2 bytes of data.
705 if (Bytes.size() < 2) {
707 return MCDisassembler::Fail;
710 uint16_t Insn16 = (Bytes[1] << 8) | Bytes[0];
711 DecodeStatus Result =
712 decodeInstruction(DecoderTableThumb16, MI, Insn16, Address, this, STI);
713 if (Result != MCDisassembler::Fail) {
715 Check(Result, AddThumbPredicate(MI));
720 Result = decodeInstruction(DecoderTableThumbSBit16, MI, Insn16, Address, this,
724 bool InITBlock = ITBlock.instrInITBlock();
725 Check(Result, AddThumbPredicate(MI));
726 AddThumb1SBit(MI, InITBlock);
732 decodeInstruction(DecoderTableThumb216, MI, Insn16, Address, this, STI);
733 if (Result != MCDisassembler::Fail) {
736 // Nested IT blocks are UNPREDICTABLE. Must be checked before we add
737 // the Thumb predicate.
738 if (MI.getOpcode() == ARM::t2IT && ITBlock.instrInITBlock())
739 Result = MCDisassembler::SoftFail;
741 Check(Result, AddThumbPredicate(MI));
743 // If we find an IT instruction, we need to parse its condition
744 // code and mask operands so that we can apply them correctly
745 // to the subsequent instructions.
746 if (MI.getOpcode() == ARM::t2IT) {
748 unsigned Firstcond = MI.getOperand(0).getImm();
749 unsigned Mask = MI.getOperand(1).getImm();
750 ITBlock.setITState(Firstcond, Mask);
756 // We want to read exactly 4 bytes of data.
757 if (Bytes.size() < 4) {
759 return MCDisassembler::Fail;
763 (Bytes[3] << 8) | (Bytes[2] << 0) | (Bytes[1] << 24) | (Bytes[0] << 16);
766 decodeInstruction(DecoderTableThumb32, MI, Insn32, Address, this, STI);
767 if (Result != MCDisassembler::Fail) {
769 bool InITBlock = ITBlock.instrInITBlock();
770 Check(Result, AddThumbPredicate(MI));
771 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) {
787 decodeInstruction(DecoderTableVFP32, MI, Insn32, Address, this, STI);
788 if (Result != MCDisassembler::Fail) {
790 UpdateThumbVFPPredicate(MI);
797 decodeInstruction(DecoderTableVFPV832, MI, Insn32, Address, this, STI);
798 if (Result != MCDisassembler::Fail) {
803 if (fieldFromInstruction(Insn32, 28, 4) == 0xE) {
805 Result = decodeInstruction(DecoderTableNEONDup32, MI, Insn32, Address, this,
807 if (Result != MCDisassembler::Fail) {
809 Check(Result, AddThumbPredicate(MI));
814 if (fieldFromInstruction(Insn32, 24, 8) == 0xF9) {
816 uint32_t NEONLdStInsn = Insn32;
817 NEONLdStInsn &= 0xF0FFFFFF;
818 NEONLdStInsn |= 0x04000000;
819 Result = decodeInstruction(DecoderTableNEONLoadStore32, MI, NEONLdStInsn,
821 if (Result != MCDisassembler::Fail) {
823 Check(Result, AddThumbPredicate(MI));
828 if (fieldFromInstruction(Insn32, 24, 4) == 0xF) {
830 uint32_t NEONDataInsn = Insn32;
831 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
832 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
833 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
834 Result = decodeInstruction(DecoderTableNEONData32, MI, NEONDataInsn,
836 if (Result != MCDisassembler::Fail) {
838 Check(Result, AddThumbPredicate(MI));
843 uint32_t NEONCryptoInsn = Insn32;
844 NEONCryptoInsn &= 0xF0FFFFFF; // Clear bits 27-24
845 NEONCryptoInsn |= (NEONCryptoInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
846 NEONCryptoInsn |= 0x12000000; // Set bits 28 and 25
847 Result = decodeInstruction(DecoderTablev8Crypto32, MI, NEONCryptoInsn,
849 if (Result != MCDisassembler::Fail) {
855 uint32_t NEONv8Insn = Insn32;
856 NEONv8Insn &= 0xF3FFFFFF; // Clear bits 27-26
857 Result = decodeInstruction(DecoderTablev8NEON32, MI, NEONv8Insn, Address,
859 if (Result != MCDisassembler::Fail) {
867 return MCDisassembler::Fail;
871 extern "C" void LLVMInitializeARMDisassembler() {
872 TargetRegistry::RegisterMCDisassembler(TheARMLETarget,
873 createARMDisassembler);
874 TargetRegistry::RegisterMCDisassembler(TheARMBETarget,
875 createARMDisassembler);
876 TargetRegistry::RegisterMCDisassembler(TheThumbLETarget,
877 createThumbDisassembler);
878 TargetRegistry::RegisterMCDisassembler(TheThumbBETarget,
879 createThumbDisassembler);
882 static const uint16_t GPRDecoderTable[] = {
883 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
884 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
885 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
886 ARM::R12, ARM::SP, ARM::LR, ARM::PC
889 static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
890 uint64_t Address, const void *Decoder) {
892 return MCDisassembler::Fail;
894 unsigned Register = GPRDecoderTable[RegNo];
895 Inst.addOperand(MCOperand::CreateReg(Register));
896 return MCDisassembler::Success;
900 DecodeGPRnopcRegisterClass(MCInst &Inst, unsigned RegNo,
901 uint64_t Address, const void *Decoder) {
902 DecodeStatus S = MCDisassembler::Success;
905 S = MCDisassembler::SoftFail;
907 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
913 DecodeGPRwithAPSRRegisterClass(MCInst &Inst, unsigned RegNo,
914 uint64_t Address, const void *Decoder) {
915 DecodeStatus S = MCDisassembler::Success;
919 Inst.addOperand(MCOperand::CreateReg(ARM::APSR_NZCV));
920 return MCDisassembler::Success;
923 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
927 static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
928 uint64_t Address, const void *Decoder) {
930 return MCDisassembler::Fail;
931 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
934 static const uint16_t GPRPairDecoderTable[] = {
935 ARM::R0_R1, ARM::R2_R3, ARM::R4_R5, ARM::R6_R7,
936 ARM::R8_R9, ARM::R10_R11, ARM::R12_SP
939 static DecodeStatus DecodeGPRPairRegisterClass(MCInst &Inst, unsigned RegNo,
940 uint64_t Address, const void *Decoder) {
941 DecodeStatus S = MCDisassembler::Success;
944 return MCDisassembler::Fail;
946 if ((RegNo & 1) || RegNo == 0xe)
947 S = MCDisassembler::SoftFail;
949 unsigned RegisterPair = GPRPairDecoderTable[RegNo/2];
950 Inst.addOperand(MCOperand::CreateReg(RegisterPair));
954 static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
955 uint64_t Address, const void *Decoder) {
956 unsigned Register = 0;
977 return MCDisassembler::Fail;
980 Inst.addOperand(MCOperand::CreateReg(Register));
981 return MCDisassembler::Success;
984 static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
985 uint64_t Address, const void *Decoder) {
986 DecodeStatus S = MCDisassembler::Success;
987 if (RegNo == 13 || RegNo == 15)
988 S = MCDisassembler::SoftFail;
989 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
993 static const uint16_t SPRDecoderTable[] = {
994 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
995 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
996 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
997 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
998 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
999 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
1000 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
1001 ARM::S28, ARM::S29, ARM::S30, ARM::S31
1004 static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
1005 uint64_t Address, const void *Decoder) {
1007 return MCDisassembler::Fail;
1009 unsigned Register = SPRDecoderTable[RegNo];
1010 Inst.addOperand(MCOperand::CreateReg(Register));
1011 return MCDisassembler::Success;
1014 static const uint16_t DPRDecoderTable[] = {
1015 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
1016 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
1017 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
1018 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
1019 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
1020 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
1021 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
1022 ARM::D28, ARM::D29, ARM::D30, ARM::D31
1025 static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
1026 uint64_t Address, const void *Decoder) {
1027 uint64_t featureBits = ((const MCDisassembler*)Decoder)->getSubtargetInfo()
1029 bool hasD16 = featureBits & ARM::FeatureD16;
1031 if (RegNo > 31 || (hasD16 && RegNo > 15))
1032 return MCDisassembler::Fail;
1034 unsigned Register = DPRDecoderTable[RegNo];
1035 Inst.addOperand(MCOperand::CreateReg(Register));
1036 return MCDisassembler::Success;
1039 static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
1040 uint64_t Address, const void *Decoder) {
1042 return MCDisassembler::Fail;
1043 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
1047 DecodeDPR_VFP2RegisterClass(MCInst &Inst, unsigned RegNo,
1048 uint64_t Address, const void *Decoder) {
1050 return MCDisassembler::Fail;
1051 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
1054 static const uint16_t QPRDecoderTable[] = {
1055 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
1056 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
1057 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
1058 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
1062 static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
1063 uint64_t Address, const void *Decoder) {
1064 if (RegNo > 31 || (RegNo & 1) != 0)
1065 return MCDisassembler::Fail;
1068 unsigned Register = QPRDecoderTable[RegNo];
1069 Inst.addOperand(MCOperand::CreateReg(Register));
1070 return MCDisassembler::Success;
1073 static const uint16_t DPairDecoderTable[] = {
1074 ARM::Q0, ARM::D1_D2, ARM::Q1, ARM::D3_D4, ARM::Q2, ARM::D5_D6,
1075 ARM::Q3, ARM::D7_D8, ARM::Q4, ARM::D9_D10, ARM::Q5, ARM::D11_D12,
1076 ARM::Q6, ARM::D13_D14, ARM::Q7, ARM::D15_D16, ARM::Q8, ARM::D17_D18,
1077 ARM::Q9, ARM::D19_D20, ARM::Q10, ARM::D21_D22, ARM::Q11, ARM::D23_D24,
1078 ARM::Q12, ARM::D25_D26, ARM::Q13, ARM::D27_D28, ARM::Q14, ARM::D29_D30,
1082 static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
1083 uint64_t Address, const void *Decoder) {
1085 return MCDisassembler::Fail;
1087 unsigned Register = DPairDecoderTable[RegNo];
1088 Inst.addOperand(MCOperand::CreateReg(Register));
1089 return MCDisassembler::Success;
1092 static const uint16_t DPairSpacedDecoderTable[] = {
1093 ARM::D0_D2, ARM::D1_D3, ARM::D2_D4, ARM::D3_D5,
1094 ARM::D4_D6, ARM::D5_D7, ARM::D6_D8, ARM::D7_D9,
1095 ARM::D8_D10, ARM::D9_D11, ARM::D10_D12, ARM::D11_D13,
1096 ARM::D12_D14, ARM::D13_D15, ARM::D14_D16, ARM::D15_D17,
1097 ARM::D16_D18, ARM::D17_D19, ARM::D18_D20, ARM::D19_D21,
1098 ARM::D20_D22, ARM::D21_D23, ARM::D22_D24, ARM::D23_D25,
1099 ARM::D24_D26, ARM::D25_D27, ARM::D26_D28, ARM::D27_D29,
1100 ARM::D28_D30, ARM::D29_D31
1103 static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
1106 const void *Decoder) {
1108 return MCDisassembler::Fail;
1110 unsigned Register = DPairSpacedDecoderTable[RegNo];
1111 Inst.addOperand(MCOperand::CreateReg(Register));
1112 return MCDisassembler::Success;
1115 static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
1116 uint64_t Address, const void *Decoder) {
1117 if (Val == 0xF) return MCDisassembler::Fail;
1118 // AL predicate is not allowed on Thumb1 branches.
1119 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
1120 return MCDisassembler::Fail;
1121 Inst.addOperand(MCOperand::CreateImm(Val));
1122 if (Val == ARMCC::AL) {
1123 Inst.addOperand(MCOperand::CreateReg(0));
1125 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1126 return MCDisassembler::Success;
1129 static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
1130 uint64_t Address, const void *Decoder) {
1132 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1134 Inst.addOperand(MCOperand::CreateReg(0));
1135 return MCDisassembler::Success;
1138 static DecodeStatus DecodeSOImmOperand(MCInst &Inst, unsigned Val,
1139 uint64_t Address, const void *Decoder) {
1140 uint32_t imm = Val & 0xFF;
1141 uint32_t rot = (Val & 0xF00) >> 7;
1142 uint32_t rot_imm = (imm >> rot) | (imm << ((32-rot) & 0x1F));
1143 Inst.addOperand(MCOperand::CreateImm(rot_imm));
1144 return MCDisassembler::Success;
1147 static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Val,
1148 uint64_t Address, const void *Decoder) {
1149 DecodeStatus S = MCDisassembler::Success;
1151 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1152 unsigned type = fieldFromInstruction(Val, 5, 2);
1153 unsigned imm = fieldFromInstruction(Val, 7, 5);
1155 // Register-immediate
1156 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1157 return MCDisassembler::Fail;
1159 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1162 Shift = ARM_AM::lsl;
1165 Shift = ARM_AM::lsr;
1168 Shift = ARM_AM::asr;
1171 Shift = ARM_AM::ror;
1175 if (Shift == ARM_AM::ror && imm == 0)
1176 Shift = ARM_AM::rrx;
1178 unsigned Op = Shift | (imm << 3);
1179 Inst.addOperand(MCOperand::CreateImm(Op));
1184 static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Val,
1185 uint64_t Address, const void *Decoder) {
1186 DecodeStatus S = MCDisassembler::Success;
1188 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1189 unsigned type = fieldFromInstruction(Val, 5, 2);
1190 unsigned Rs = fieldFromInstruction(Val, 8, 4);
1192 // Register-register
1193 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1194 return MCDisassembler::Fail;
1195 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)))
1196 return MCDisassembler::Fail;
1198 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1201 Shift = ARM_AM::lsl;
1204 Shift = ARM_AM::lsr;
1207 Shift = ARM_AM::asr;
1210 Shift = ARM_AM::ror;
1214 Inst.addOperand(MCOperand::CreateImm(Shift));
1219 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
1220 uint64_t Address, const void *Decoder) {
1221 DecodeStatus S = MCDisassembler::Success;
1223 bool NeedDisjointWriteback = false;
1224 unsigned WritebackReg = 0;
1225 switch (Inst.getOpcode()) {
1228 case ARM::LDMIA_UPD:
1229 case ARM::LDMDB_UPD:
1230 case ARM::LDMIB_UPD:
1231 case ARM::LDMDA_UPD:
1232 case ARM::t2LDMIA_UPD:
1233 case ARM::t2LDMDB_UPD:
1234 case ARM::t2STMIA_UPD:
1235 case ARM::t2STMDB_UPD:
1236 NeedDisjointWriteback = true;
1237 WritebackReg = Inst.getOperand(0).getReg();
1241 // Empty register lists are not allowed.
1242 if (Val == 0) return MCDisassembler::Fail;
1243 for (unsigned i = 0; i < 16; ++i) {
1244 if (Val & (1 << i)) {
1245 if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder)))
1246 return MCDisassembler::Fail;
1247 // Writeback not allowed if Rn is in the target list.
1248 if (NeedDisjointWriteback && WritebackReg == Inst.end()[-1].getReg())
1249 Check(S, MCDisassembler::SoftFail);
1256 static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
1257 uint64_t Address, const void *Decoder) {
1258 DecodeStatus S = MCDisassembler::Success;
1260 unsigned Vd = fieldFromInstruction(Val, 8, 5);
1261 unsigned regs = fieldFromInstruction(Val, 0, 8);
1263 // In case of unpredictable encoding, tweak the operands.
1264 if (regs == 0 || (Vd + regs) > 32) {
1265 regs = Vd + regs > 32 ? 32 - Vd : regs;
1266 regs = std::max( 1u, regs);
1267 S = MCDisassembler::SoftFail;
1270 if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
1271 return MCDisassembler::Fail;
1272 for (unsigned i = 0; i < (regs - 1); ++i) {
1273 if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1274 return MCDisassembler::Fail;
1280 static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
1281 uint64_t Address, const void *Decoder) {
1282 DecodeStatus S = MCDisassembler::Success;
1284 unsigned Vd = fieldFromInstruction(Val, 8, 5);
1285 unsigned regs = fieldFromInstruction(Val, 1, 7);
1287 // In case of unpredictable encoding, tweak the operands.
1288 if (regs == 0 || regs > 16 || (Vd + regs) > 32) {
1289 regs = Vd + regs > 32 ? 32 - Vd : regs;
1290 regs = std::max( 1u, regs);
1291 regs = std::min(16u, regs);
1292 S = MCDisassembler::SoftFail;
1295 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
1296 return MCDisassembler::Fail;
1297 for (unsigned i = 0; i < (regs - 1); ++i) {
1298 if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1299 return MCDisassembler::Fail;
1305 static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Val,
1306 uint64_t Address, const void *Decoder) {
1307 // This operand encodes a mask of contiguous zeros between a specified MSB
1308 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
1309 // the mask of all bits LSB-and-lower, and then xor them to create
1310 // the mask of that's all ones on [msb, lsb]. Finally we not it to
1311 // create the final mask.
1312 unsigned msb = fieldFromInstruction(Val, 5, 5);
1313 unsigned lsb = fieldFromInstruction(Val, 0, 5);
1315 DecodeStatus S = MCDisassembler::Success;
1317 Check(S, MCDisassembler::SoftFail);
1318 // The check above will cause the warning for the "potentially undefined
1319 // instruction encoding" but we can't build a bad MCOperand value here
1320 // with a lsb > msb or else printing the MCInst will cause a crash.
1324 uint32_t msb_mask = 0xFFFFFFFF;
1325 if (msb != 31) msb_mask = (1U << (msb+1)) - 1;
1326 uint32_t lsb_mask = (1U << lsb) - 1;
1328 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
1332 static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
1333 uint64_t Address, const void *Decoder) {
1334 DecodeStatus S = MCDisassembler::Success;
1336 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1337 unsigned CRd = fieldFromInstruction(Insn, 12, 4);
1338 unsigned coproc = fieldFromInstruction(Insn, 8, 4);
1339 unsigned imm = fieldFromInstruction(Insn, 0, 8);
1340 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1341 unsigned U = fieldFromInstruction(Insn, 23, 1);
1343 switch (Inst.getOpcode()) {
1344 case ARM::LDC_OFFSET:
1347 case ARM::LDC_OPTION:
1348 case ARM::LDCL_OFFSET:
1350 case ARM::LDCL_POST:
1351 case ARM::LDCL_OPTION:
1352 case ARM::STC_OFFSET:
1355 case ARM::STC_OPTION:
1356 case ARM::STCL_OFFSET:
1358 case ARM::STCL_POST:
1359 case ARM::STCL_OPTION:
1360 case ARM::t2LDC_OFFSET:
1361 case ARM::t2LDC_PRE:
1362 case ARM::t2LDC_POST:
1363 case ARM::t2LDC_OPTION:
1364 case ARM::t2LDCL_OFFSET:
1365 case ARM::t2LDCL_PRE:
1366 case ARM::t2LDCL_POST:
1367 case ARM::t2LDCL_OPTION:
1368 case ARM::t2STC_OFFSET:
1369 case ARM::t2STC_PRE:
1370 case ARM::t2STC_POST:
1371 case ARM::t2STC_OPTION:
1372 case ARM::t2STCL_OFFSET:
1373 case ARM::t2STCL_PRE:
1374 case ARM::t2STCL_POST:
1375 case ARM::t2STCL_OPTION:
1376 if (coproc == 0xA || coproc == 0xB)
1377 return MCDisassembler::Fail;
1383 uint64_t featureBits = ((const MCDisassembler*)Decoder)->getSubtargetInfo()
1385 if ((featureBits & ARM::HasV8Ops) && (coproc != 14))
1386 return MCDisassembler::Fail;
1388 Inst.addOperand(MCOperand::CreateImm(coproc));
1389 Inst.addOperand(MCOperand::CreateImm(CRd));
1390 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1391 return MCDisassembler::Fail;
1393 switch (Inst.getOpcode()) {
1394 case ARM::t2LDC2_OFFSET:
1395 case ARM::t2LDC2L_OFFSET:
1396 case ARM::t2LDC2_PRE:
1397 case ARM::t2LDC2L_PRE:
1398 case ARM::t2STC2_OFFSET:
1399 case ARM::t2STC2L_OFFSET:
1400 case ARM::t2STC2_PRE:
1401 case ARM::t2STC2L_PRE:
1402 case ARM::LDC2_OFFSET:
1403 case ARM::LDC2L_OFFSET:
1405 case ARM::LDC2L_PRE:
1406 case ARM::STC2_OFFSET:
1407 case ARM::STC2L_OFFSET:
1409 case ARM::STC2L_PRE:
1410 case ARM::t2LDC_OFFSET:
1411 case ARM::t2LDCL_OFFSET:
1412 case ARM::t2LDC_PRE:
1413 case ARM::t2LDCL_PRE:
1414 case ARM::t2STC_OFFSET:
1415 case ARM::t2STCL_OFFSET:
1416 case ARM::t2STC_PRE:
1417 case ARM::t2STCL_PRE:
1418 case ARM::LDC_OFFSET:
1419 case ARM::LDCL_OFFSET:
1422 case ARM::STC_OFFSET:
1423 case ARM::STCL_OFFSET:
1426 imm = ARM_AM::getAM5Opc(U ? ARM_AM::add : ARM_AM::sub, imm);
1427 Inst.addOperand(MCOperand::CreateImm(imm));
1429 case ARM::t2LDC2_POST:
1430 case ARM::t2LDC2L_POST:
1431 case ARM::t2STC2_POST:
1432 case ARM::t2STC2L_POST:
1433 case ARM::LDC2_POST:
1434 case ARM::LDC2L_POST:
1435 case ARM::STC2_POST:
1436 case ARM::STC2L_POST:
1437 case ARM::t2LDC_POST:
1438 case ARM::t2LDCL_POST:
1439 case ARM::t2STC_POST:
1440 case ARM::t2STCL_POST:
1442 case ARM::LDCL_POST:
1444 case ARM::STCL_POST:
1448 // The 'option' variant doesn't encode 'U' in the immediate since
1449 // the immediate is unsigned [0,255].
1450 Inst.addOperand(MCOperand::CreateImm(imm));
1454 switch (Inst.getOpcode()) {
1455 case ARM::LDC_OFFSET:
1458 case ARM::LDC_OPTION:
1459 case ARM::LDCL_OFFSET:
1461 case ARM::LDCL_POST:
1462 case ARM::LDCL_OPTION:
1463 case ARM::STC_OFFSET:
1466 case ARM::STC_OPTION:
1467 case ARM::STCL_OFFSET:
1469 case ARM::STCL_POST:
1470 case ARM::STCL_OPTION:
1471 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1472 return MCDisassembler::Fail;
1482 DecodeAddrMode2IdxInstruction(MCInst &Inst, unsigned Insn,
1483 uint64_t Address, const void *Decoder) {
1484 DecodeStatus S = MCDisassembler::Success;
1486 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1487 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1488 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1489 unsigned imm = fieldFromInstruction(Insn, 0, 12);
1490 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1491 unsigned reg = fieldFromInstruction(Insn, 25, 1);
1492 unsigned P = fieldFromInstruction(Insn, 24, 1);
1493 unsigned W = fieldFromInstruction(Insn, 21, 1);
1495 // On stores, the writeback operand precedes Rt.
1496 switch (Inst.getOpcode()) {
1497 case ARM::STR_POST_IMM:
1498 case ARM::STR_POST_REG:
1499 case ARM::STRB_POST_IMM:
1500 case ARM::STRB_POST_REG:
1501 case ARM::STRT_POST_REG:
1502 case ARM::STRT_POST_IMM:
1503 case ARM::STRBT_POST_REG:
1504 case ARM::STRBT_POST_IMM:
1505 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1506 return MCDisassembler::Fail;
1512 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1513 return MCDisassembler::Fail;
1515 // On loads, the writeback operand comes after Rt.
1516 switch (Inst.getOpcode()) {
1517 case ARM::LDR_POST_IMM:
1518 case ARM::LDR_POST_REG:
1519 case ARM::LDRB_POST_IMM:
1520 case ARM::LDRB_POST_REG:
1521 case ARM::LDRBT_POST_REG:
1522 case ARM::LDRBT_POST_IMM:
1523 case ARM::LDRT_POST_REG:
1524 case ARM::LDRT_POST_IMM:
1525 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1526 return MCDisassembler::Fail;
1532 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1533 return MCDisassembler::Fail;
1535 ARM_AM::AddrOpc Op = ARM_AM::add;
1536 if (!fieldFromInstruction(Insn, 23, 1))
1539 bool writeback = (P == 0) || (W == 1);
1540 unsigned idx_mode = 0;
1542 idx_mode = ARMII::IndexModePre;
1543 else if (!P && writeback)
1544 idx_mode = ARMII::IndexModePost;
1546 if (writeback && (Rn == 15 || Rn == Rt))
1547 S = MCDisassembler::SoftFail; // UNPREDICTABLE
1550 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1551 return MCDisassembler::Fail;
1552 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1553 switch( fieldFromInstruction(Insn, 5, 2)) {
1567 return MCDisassembler::Fail;
1569 unsigned amt = fieldFromInstruction(Insn, 7, 5);
1570 if (Opc == ARM_AM::ror && amt == 0)
1572 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1574 Inst.addOperand(MCOperand::CreateImm(imm));
1576 Inst.addOperand(MCOperand::CreateReg(0));
1577 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1578 Inst.addOperand(MCOperand::CreateImm(tmp));
1581 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1582 return MCDisassembler::Fail;
1587 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Val,
1588 uint64_t Address, const void *Decoder) {
1589 DecodeStatus S = MCDisassembler::Success;
1591 unsigned Rn = fieldFromInstruction(Val, 13, 4);
1592 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1593 unsigned type = fieldFromInstruction(Val, 5, 2);
1594 unsigned imm = fieldFromInstruction(Val, 7, 5);
1595 unsigned U = fieldFromInstruction(Val, 12, 1);
1597 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1613 if (ShOp == ARM_AM::ror && imm == 0)
1616 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1617 return MCDisassembler::Fail;
1618 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1619 return MCDisassembler::Fail;
1622 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1624 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1625 Inst.addOperand(MCOperand::CreateImm(shift));
1631 DecodeAddrMode3Instruction(MCInst &Inst, unsigned Insn,
1632 uint64_t Address, const void *Decoder) {
1633 DecodeStatus S = MCDisassembler::Success;
1635 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1636 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1637 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1638 unsigned type = fieldFromInstruction(Insn, 22, 1);
1639 unsigned imm = fieldFromInstruction(Insn, 8, 4);
1640 unsigned U = ((~fieldFromInstruction(Insn, 23, 1)) & 1) << 8;
1641 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1642 unsigned W = fieldFromInstruction(Insn, 21, 1);
1643 unsigned P = fieldFromInstruction(Insn, 24, 1);
1644 unsigned Rt2 = Rt + 1;
1646 bool writeback = (W == 1) | (P == 0);
1648 // For {LD,ST}RD, Rt must be even, else undefined.
1649 switch (Inst.getOpcode()) {
1652 case ARM::STRD_POST:
1655 case ARM::LDRD_POST:
1656 if (Rt & 0x1) S = MCDisassembler::SoftFail;
1661 switch (Inst.getOpcode()) {
1664 case ARM::STRD_POST:
1665 if (P == 0 && W == 1)
1666 S = MCDisassembler::SoftFail;
1668 if (writeback && (Rn == 15 || Rn == Rt || Rn == Rt2))
1669 S = MCDisassembler::SoftFail;
1670 if (type && Rm == 15)
1671 S = MCDisassembler::SoftFail;
1673 S = MCDisassembler::SoftFail;
1674 if (!type && fieldFromInstruction(Insn, 8, 4))
1675 S = MCDisassembler::SoftFail;
1679 case ARM::STRH_POST:
1681 S = MCDisassembler::SoftFail;
1682 if (writeback && (Rn == 15 || Rn == Rt))
1683 S = MCDisassembler::SoftFail;
1684 if (!type && Rm == 15)
1685 S = MCDisassembler::SoftFail;
1689 case ARM::LDRD_POST:
1690 if (type && Rn == 15){
1692 S = MCDisassembler::SoftFail;
1695 if (P == 0 && W == 1)
1696 S = MCDisassembler::SoftFail;
1697 if (!type && (Rt2 == 15 || Rm == 15 || Rm == Rt || Rm == Rt2))
1698 S = MCDisassembler::SoftFail;
1699 if (!type && writeback && Rn == 15)
1700 S = MCDisassembler::SoftFail;
1701 if (writeback && (Rn == Rt || Rn == Rt2))
1702 S = MCDisassembler::SoftFail;
1706 case ARM::LDRH_POST:
1707 if (type && Rn == 15){
1709 S = MCDisassembler::SoftFail;
1713 S = MCDisassembler::SoftFail;
1714 if (!type && Rm == 15)
1715 S = MCDisassembler::SoftFail;
1716 if (!type && writeback && (Rn == 15 || Rn == Rt))
1717 S = MCDisassembler::SoftFail;
1720 case ARM::LDRSH_PRE:
1721 case ARM::LDRSH_POST:
1723 case ARM::LDRSB_PRE:
1724 case ARM::LDRSB_POST:
1725 if (type && Rn == 15){
1727 S = MCDisassembler::SoftFail;
1730 if (type && (Rt == 15 || (writeback && Rn == Rt)))
1731 S = MCDisassembler::SoftFail;
1732 if (!type && (Rt == 15 || Rm == 15))
1733 S = MCDisassembler::SoftFail;
1734 if (!type && writeback && (Rn == 15 || Rn == Rt))
1735 S = MCDisassembler::SoftFail;
1741 if (writeback) { // Writeback
1743 U |= ARMII::IndexModePre << 9;
1745 U |= ARMII::IndexModePost << 9;
1747 // On stores, the writeback operand precedes Rt.
1748 switch (Inst.getOpcode()) {
1751 case ARM::STRD_POST:
1754 case ARM::STRH_POST:
1755 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1756 return MCDisassembler::Fail;
1763 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1764 return MCDisassembler::Fail;
1765 switch (Inst.getOpcode()) {
1768 case ARM::STRD_POST:
1771 case ARM::LDRD_POST:
1772 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
1773 return MCDisassembler::Fail;
1780 // On loads, the writeback operand comes after Rt.
1781 switch (Inst.getOpcode()) {
1784 case ARM::LDRD_POST:
1787 case ARM::LDRH_POST:
1789 case ARM::LDRSH_PRE:
1790 case ARM::LDRSH_POST:
1792 case ARM::LDRSB_PRE:
1793 case ARM::LDRSB_POST:
1796 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1797 return MCDisassembler::Fail;
1804 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1805 return MCDisassembler::Fail;
1808 Inst.addOperand(MCOperand::CreateReg(0));
1809 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1811 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1812 return MCDisassembler::Fail;
1813 Inst.addOperand(MCOperand::CreateImm(U));
1816 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1817 return MCDisassembler::Fail;
1822 static DecodeStatus DecodeRFEInstruction(MCInst &Inst, unsigned Insn,
1823 uint64_t Address, const void *Decoder) {
1824 DecodeStatus S = MCDisassembler::Success;
1826 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1827 unsigned mode = fieldFromInstruction(Insn, 23, 2);
1844 Inst.addOperand(MCOperand::CreateImm(mode));
1845 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1846 return MCDisassembler::Fail;
1851 static DecodeStatus DecodeQADDInstruction(MCInst &Inst, unsigned Insn,
1852 uint64_t Address, const void *Decoder) {
1853 DecodeStatus S = MCDisassembler::Success;
1855 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
1856 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1857 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1858 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1861 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
1863 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1864 return MCDisassembler::Fail;
1865 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1866 return MCDisassembler::Fail;
1867 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
1868 return MCDisassembler::Fail;
1869 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1870 return MCDisassembler::Fail;
1874 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst &Inst,
1876 uint64_t Address, const void *Decoder) {
1877 DecodeStatus S = MCDisassembler::Success;
1879 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1880 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1881 unsigned reglist = fieldFromInstruction(Insn, 0, 16);
1884 // Ambiguous with RFE and SRS
1885 switch (Inst.getOpcode()) {
1887 Inst.setOpcode(ARM::RFEDA);
1889 case ARM::LDMDA_UPD:
1890 Inst.setOpcode(ARM::RFEDA_UPD);
1893 Inst.setOpcode(ARM::RFEDB);
1895 case ARM::LDMDB_UPD:
1896 Inst.setOpcode(ARM::RFEDB_UPD);
1899 Inst.setOpcode(ARM::RFEIA);
1901 case ARM::LDMIA_UPD:
1902 Inst.setOpcode(ARM::RFEIA_UPD);
1905 Inst.setOpcode(ARM::RFEIB);
1907 case ARM::LDMIB_UPD:
1908 Inst.setOpcode(ARM::RFEIB_UPD);
1911 Inst.setOpcode(ARM::SRSDA);
1913 case ARM::STMDA_UPD:
1914 Inst.setOpcode(ARM::SRSDA_UPD);
1917 Inst.setOpcode(ARM::SRSDB);
1919 case ARM::STMDB_UPD:
1920 Inst.setOpcode(ARM::SRSDB_UPD);
1923 Inst.setOpcode(ARM::SRSIA);
1925 case ARM::STMIA_UPD:
1926 Inst.setOpcode(ARM::SRSIA_UPD);
1929 Inst.setOpcode(ARM::SRSIB);
1931 case ARM::STMIB_UPD:
1932 Inst.setOpcode(ARM::SRSIB_UPD);
1935 return MCDisassembler::Fail;
1938 // For stores (which become SRS's, the only operand is the mode.
1939 if (fieldFromInstruction(Insn, 20, 1) == 0) {
1940 // Check SRS encoding constraints
1941 if (!(fieldFromInstruction(Insn, 22, 1) == 1 &&
1942 fieldFromInstruction(Insn, 20, 1) == 0))
1943 return MCDisassembler::Fail;
1946 MCOperand::CreateImm(fieldFromInstruction(Insn, 0, 4)));
1950 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1953 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1954 return MCDisassembler::Fail;
1955 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1956 return MCDisassembler::Fail; // Tied
1957 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1958 return MCDisassembler::Fail;
1959 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
1960 return MCDisassembler::Fail;
1965 static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
1966 uint64_t Address, const void *Decoder) {
1967 unsigned imod = fieldFromInstruction(Insn, 18, 2);
1968 unsigned M = fieldFromInstruction(Insn, 17, 1);
1969 unsigned iflags = fieldFromInstruction(Insn, 6, 3);
1970 unsigned mode = fieldFromInstruction(Insn, 0, 5);
1972 DecodeStatus S = MCDisassembler::Success;
1974 // This decoder is called from multiple location that do not check
1975 // the full encoding is valid before they do.
1976 if (fieldFromInstruction(Insn, 5, 1) != 0 ||
1977 fieldFromInstruction(Insn, 16, 1) != 0 ||
1978 fieldFromInstruction(Insn, 20, 8) != 0x10)
1979 return MCDisassembler::Fail;
1981 // imod == '01' --> UNPREDICTABLE
1982 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1983 // return failure here. The '01' imod value is unprintable, so there's
1984 // nothing useful we could do even if we returned UNPREDICTABLE.
1986 if (imod == 1) return MCDisassembler::Fail;
1989 Inst.setOpcode(ARM::CPS3p);
1990 Inst.addOperand(MCOperand::CreateImm(imod));
1991 Inst.addOperand(MCOperand::CreateImm(iflags));
1992 Inst.addOperand(MCOperand::CreateImm(mode));
1993 } else if (imod && !M) {
1994 Inst.setOpcode(ARM::CPS2p);
1995 Inst.addOperand(MCOperand::CreateImm(imod));
1996 Inst.addOperand(MCOperand::CreateImm(iflags));
1997 if (mode) S = MCDisassembler::SoftFail;
1998 } else if (!imod && M) {
1999 Inst.setOpcode(ARM::CPS1p);
2000 Inst.addOperand(MCOperand::CreateImm(mode));
2001 if (iflags) S = MCDisassembler::SoftFail;
2003 // imod == '00' && M == '0' --> UNPREDICTABLE
2004 Inst.setOpcode(ARM::CPS1p);
2005 Inst.addOperand(MCOperand::CreateImm(mode));
2006 S = MCDisassembler::SoftFail;
2012 static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
2013 uint64_t Address, const void *Decoder) {
2014 unsigned imod = fieldFromInstruction(Insn, 9, 2);
2015 unsigned M = fieldFromInstruction(Insn, 8, 1);
2016 unsigned iflags = fieldFromInstruction(Insn, 5, 3);
2017 unsigned mode = fieldFromInstruction(Insn, 0, 5);
2019 DecodeStatus S = MCDisassembler::Success;
2021 // imod == '01' --> UNPREDICTABLE
2022 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
2023 // return failure here. The '01' imod value is unprintable, so there's
2024 // nothing useful we could do even if we returned UNPREDICTABLE.
2026 if (imod == 1) return MCDisassembler::Fail;
2029 Inst.setOpcode(ARM::t2CPS3p);
2030 Inst.addOperand(MCOperand::CreateImm(imod));
2031 Inst.addOperand(MCOperand::CreateImm(iflags));
2032 Inst.addOperand(MCOperand::CreateImm(mode));
2033 } else if (imod && !M) {
2034 Inst.setOpcode(ARM::t2CPS2p);
2035 Inst.addOperand(MCOperand::CreateImm(imod));
2036 Inst.addOperand(MCOperand::CreateImm(iflags));
2037 if (mode) S = MCDisassembler::SoftFail;
2038 } else if (!imod && M) {
2039 Inst.setOpcode(ARM::t2CPS1p);
2040 Inst.addOperand(MCOperand::CreateImm(mode));
2041 if (iflags) S = MCDisassembler::SoftFail;
2043 // imod == '00' && M == '0' --> this is a HINT instruction
2044 int imm = fieldFromInstruction(Insn, 0, 8);
2045 // HINT are defined only for immediate in [0..4]
2046 if(imm > 4) return MCDisassembler::Fail;
2047 Inst.setOpcode(ARM::t2HINT);
2048 Inst.addOperand(MCOperand::CreateImm(imm));
2054 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
2055 uint64_t Address, const void *Decoder) {
2056 DecodeStatus S = MCDisassembler::Success;
2058 unsigned Rd = fieldFromInstruction(Insn, 8, 4);
2061 imm |= (fieldFromInstruction(Insn, 0, 8) << 0);
2062 imm |= (fieldFromInstruction(Insn, 12, 3) << 8);
2063 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
2064 imm |= (fieldFromInstruction(Insn, 26, 1) << 11);
2066 if (Inst.getOpcode() == ARM::t2MOVTi16)
2067 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
2068 return MCDisassembler::Fail;
2069 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
2070 return MCDisassembler::Fail;
2072 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
2073 Inst.addOperand(MCOperand::CreateImm(imm));
2078 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
2079 uint64_t Address, const void *Decoder) {
2080 DecodeStatus S = MCDisassembler::Success;
2082 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2083 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2086 imm |= (fieldFromInstruction(Insn, 0, 12) << 0);
2087 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
2089 if (Inst.getOpcode() == ARM::MOVTi16)
2090 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2091 return MCDisassembler::Fail;
2093 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2094 return MCDisassembler::Fail;
2096 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
2097 Inst.addOperand(MCOperand::CreateImm(imm));
2099 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2100 return MCDisassembler::Fail;
2105 static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
2106 uint64_t Address, const void *Decoder) {
2107 DecodeStatus S = MCDisassembler::Success;
2109 unsigned Rd = fieldFromInstruction(Insn, 16, 4);
2110 unsigned Rn = fieldFromInstruction(Insn, 0, 4);
2111 unsigned Rm = fieldFromInstruction(Insn, 8, 4);
2112 unsigned Ra = fieldFromInstruction(Insn, 12, 4);
2113 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2116 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
2118 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2119 return MCDisassembler::Fail;
2120 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
2121 return MCDisassembler::Fail;
2122 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
2123 return MCDisassembler::Fail;
2124 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
2125 return MCDisassembler::Fail;
2127 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2128 return MCDisassembler::Fail;
2133 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
2134 uint64_t Address, const void *Decoder) {
2135 DecodeStatus S = MCDisassembler::Success;
2137 unsigned add = fieldFromInstruction(Val, 12, 1);
2138 unsigned imm = fieldFromInstruction(Val, 0, 12);
2139 unsigned Rn = fieldFromInstruction(Val, 13, 4);
2141 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2142 return MCDisassembler::Fail;
2144 if (!add) imm *= -1;
2145 if (imm == 0 && !add) imm = INT32_MIN;
2146 Inst.addOperand(MCOperand::CreateImm(imm));
2148 tryAddingPcLoadReferenceComment(Address, Address + imm + 8, Decoder);
2153 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
2154 uint64_t Address, const void *Decoder) {
2155 DecodeStatus S = MCDisassembler::Success;
2157 unsigned Rn = fieldFromInstruction(Val, 9, 4);
2158 unsigned U = fieldFromInstruction(Val, 8, 1);
2159 unsigned imm = fieldFromInstruction(Val, 0, 8);
2161 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2162 return MCDisassembler::Fail;
2165 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
2167 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
2172 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
2173 uint64_t Address, const void *Decoder) {
2174 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
2178 DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
2179 uint64_t Address, const void *Decoder) {
2180 DecodeStatus Status = MCDisassembler::Success;
2182 // Note the J1 and J2 values are from the encoded instruction. So here
2183 // change them to I1 and I2 values via as documented:
2184 // I1 = NOT(J1 EOR S);
2185 // I2 = NOT(J2 EOR S);
2186 // and build the imm32 with one trailing zero as documented:
2187 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
2188 unsigned S = fieldFromInstruction(Insn, 26, 1);
2189 unsigned J1 = fieldFromInstruction(Insn, 13, 1);
2190 unsigned J2 = fieldFromInstruction(Insn, 11, 1);
2191 unsigned I1 = !(J1 ^ S);
2192 unsigned I2 = !(J2 ^ S);
2193 unsigned imm10 = fieldFromInstruction(Insn, 16, 10);
2194 unsigned imm11 = fieldFromInstruction(Insn, 0, 11);
2195 unsigned tmp = (S << 23) | (I1 << 22) | (I2 << 21) | (imm10 << 11) | imm11;
2196 int imm32 = SignExtend32<25>(tmp << 1);
2197 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
2198 true, 4, Inst, Decoder))
2199 Inst.addOperand(MCOperand::CreateImm(imm32));
2205 DecodeBranchImmInstruction(MCInst &Inst, unsigned Insn,
2206 uint64_t Address, const void *Decoder) {
2207 DecodeStatus S = MCDisassembler::Success;
2209 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2210 unsigned imm = fieldFromInstruction(Insn, 0, 24) << 2;
2213 Inst.setOpcode(ARM::BLXi);
2214 imm |= fieldFromInstruction(Insn, 24, 1) << 1;
2215 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2216 true, 4, Inst, Decoder))
2217 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2221 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2222 true, 4, Inst, Decoder))
2223 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2224 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2225 return MCDisassembler::Fail;
2231 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
2232 uint64_t Address, const void *Decoder) {
2233 DecodeStatus S = MCDisassembler::Success;
2235 unsigned Rm = fieldFromInstruction(Val, 0, 4);
2236 unsigned align = fieldFromInstruction(Val, 4, 2);
2238 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2239 return MCDisassembler::Fail;
2241 Inst.addOperand(MCOperand::CreateImm(0));
2243 Inst.addOperand(MCOperand::CreateImm(4 << align));
2248 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Insn,
2249 uint64_t Address, const void *Decoder) {
2250 DecodeStatus S = MCDisassembler::Success;
2252 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2253 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2254 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2255 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2256 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2257 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2259 // First output register
2260 switch (Inst.getOpcode()) {
2261 case ARM::VLD1q16: case ARM::VLD1q32: case ARM::VLD1q64: case ARM::VLD1q8:
2262 case ARM::VLD1q16wb_fixed: case ARM::VLD1q16wb_register:
2263 case ARM::VLD1q32wb_fixed: case ARM::VLD1q32wb_register:
2264 case ARM::VLD1q64wb_fixed: case ARM::VLD1q64wb_register:
2265 case ARM::VLD1q8wb_fixed: case ARM::VLD1q8wb_register:
2266 case ARM::VLD2d16: case ARM::VLD2d32: case ARM::VLD2d8:
2267 case ARM::VLD2d16wb_fixed: case ARM::VLD2d16wb_register:
2268 case ARM::VLD2d32wb_fixed: case ARM::VLD2d32wb_register:
2269 case ARM::VLD2d8wb_fixed: case ARM::VLD2d8wb_register:
2270 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2271 return MCDisassembler::Fail;
2276 case ARM::VLD2b16wb_fixed:
2277 case ARM::VLD2b16wb_register:
2278 case ARM::VLD2b32wb_fixed:
2279 case ARM::VLD2b32wb_register:
2280 case ARM::VLD2b8wb_fixed:
2281 case ARM::VLD2b8wb_register:
2282 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2283 return MCDisassembler::Fail;
2286 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2287 return MCDisassembler::Fail;
2290 // Second output register
2291 switch (Inst.getOpcode()) {
2295 case ARM::VLD3d8_UPD:
2296 case ARM::VLD3d16_UPD:
2297 case ARM::VLD3d32_UPD:
2301 case ARM::VLD4d8_UPD:
2302 case ARM::VLD4d16_UPD:
2303 case ARM::VLD4d32_UPD:
2304 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2305 return MCDisassembler::Fail;
2310 case ARM::VLD3q8_UPD:
2311 case ARM::VLD3q16_UPD:
2312 case ARM::VLD3q32_UPD:
2316 case ARM::VLD4q8_UPD:
2317 case ARM::VLD4q16_UPD:
2318 case ARM::VLD4q32_UPD:
2319 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2320 return MCDisassembler::Fail;
2325 // Third output register
2326 switch(Inst.getOpcode()) {
2330 case ARM::VLD3d8_UPD:
2331 case ARM::VLD3d16_UPD:
2332 case ARM::VLD3d32_UPD:
2336 case ARM::VLD4d8_UPD:
2337 case ARM::VLD4d16_UPD:
2338 case ARM::VLD4d32_UPD:
2339 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2340 return MCDisassembler::Fail;
2345 case ARM::VLD3q8_UPD:
2346 case ARM::VLD3q16_UPD:
2347 case ARM::VLD3q32_UPD:
2351 case ARM::VLD4q8_UPD:
2352 case ARM::VLD4q16_UPD:
2353 case ARM::VLD4q32_UPD:
2354 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2355 return MCDisassembler::Fail;
2361 // Fourth output register
2362 switch (Inst.getOpcode()) {
2366 case ARM::VLD4d8_UPD:
2367 case ARM::VLD4d16_UPD:
2368 case ARM::VLD4d32_UPD:
2369 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2370 return MCDisassembler::Fail;
2375 case ARM::VLD4q8_UPD:
2376 case ARM::VLD4q16_UPD:
2377 case ARM::VLD4q32_UPD:
2378 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2379 return MCDisassembler::Fail;
2385 // Writeback operand
2386 switch (Inst.getOpcode()) {
2387 case ARM::VLD1d8wb_fixed:
2388 case ARM::VLD1d16wb_fixed:
2389 case ARM::VLD1d32wb_fixed:
2390 case ARM::VLD1d64wb_fixed:
2391 case ARM::VLD1d8wb_register:
2392 case ARM::VLD1d16wb_register:
2393 case ARM::VLD1d32wb_register:
2394 case ARM::VLD1d64wb_register:
2395 case ARM::VLD1q8wb_fixed:
2396 case ARM::VLD1q16wb_fixed:
2397 case ARM::VLD1q32wb_fixed:
2398 case ARM::VLD1q64wb_fixed:
2399 case ARM::VLD1q8wb_register:
2400 case ARM::VLD1q16wb_register:
2401 case ARM::VLD1q32wb_register:
2402 case ARM::VLD1q64wb_register:
2403 case ARM::VLD1d8Twb_fixed:
2404 case ARM::VLD1d8Twb_register:
2405 case ARM::VLD1d16Twb_fixed:
2406 case ARM::VLD1d16Twb_register:
2407 case ARM::VLD1d32Twb_fixed:
2408 case ARM::VLD1d32Twb_register:
2409 case ARM::VLD1d64Twb_fixed:
2410 case ARM::VLD1d64Twb_register:
2411 case ARM::VLD1d8Qwb_fixed:
2412 case ARM::VLD1d8Qwb_register:
2413 case ARM::VLD1d16Qwb_fixed:
2414 case ARM::VLD1d16Qwb_register:
2415 case ARM::VLD1d32Qwb_fixed:
2416 case ARM::VLD1d32Qwb_register:
2417 case ARM::VLD1d64Qwb_fixed:
2418 case ARM::VLD1d64Qwb_register:
2419 case ARM::VLD2d8wb_fixed:
2420 case ARM::VLD2d16wb_fixed:
2421 case ARM::VLD2d32wb_fixed:
2422 case ARM::VLD2q8wb_fixed:
2423 case ARM::VLD2q16wb_fixed:
2424 case ARM::VLD2q32wb_fixed:
2425 case ARM::VLD2d8wb_register:
2426 case ARM::VLD2d16wb_register:
2427 case ARM::VLD2d32wb_register:
2428 case ARM::VLD2q8wb_register:
2429 case ARM::VLD2q16wb_register:
2430 case ARM::VLD2q32wb_register:
2431 case ARM::VLD2b8wb_fixed:
2432 case ARM::VLD2b16wb_fixed:
2433 case ARM::VLD2b32wb_fixed:
2434 case ARM::VLD2b8wb_register:
2435 case ARM::VLD2b16wb_register:
2436 case ARM::VLD2b32wb_register:
2437 Inst.addOperand(MCOperand::CreateImm(0));
2439 case ARM::VLD3d8_UPD:
2440 case ARM::VLD3d16_UPD:
2441 case ARM::VLD3d32_UPD:
2442 case ARM::VLD3q8_UPD:
2443 case ARM::VLD3q16_UPD:
2444 case ARM::VLD3q32_UPD:
2445 case ARM::VLD4d8_UPD:
2446 case ARM::VLD4d16_UPD:
2447 case ARM::VLD4d32_UPD:
2448 case ARM::VLD4q8_UPD:
2449 case ARM::VLD4q16_UPD:
2450 case ARM::VLD4q32_UPD:
2451 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2452 return MCDisassembler::Fail;
2458 // AddrMode6 Base (register+alignment)
2459 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2460 return MCDisassembler::Fail;
2462 // AddrMode6 Offset (register)
2463 switch (Inst.getOpcode()) {
2465 // The below have been updated to have explicit am6offset split
2466 // between fixed and register offset. For those instructions not
2467 // yet updated, we need to add an additional reg0 operand for the
2470 // The fixed offset encodes as Rm == 0xd, so we check for that.
2472 Inst.addOperand(MCOperand::CreateReg(0));
2475 // Fall through to handle the register offset variant.
2476 case ARM::VLD1d8wb_fixed:
2477 case ARM::VLD1d16wb_fixed:
2478 case ARM::VLD1d32wb_fixed:
2479 case ARM::VLD1d64wb_fixed:
2480 case ARM::VLD1d8Twb_fixed:
2481 case ARM::VLD1d16Twb_fixed:
2482 case ARM::VLD1d32Twb_fixed:
2483 case ARM::VLD1d64Twb_fixed:
2484 case ARM::VLD1d8Qwb_fixed:
2485 case ARM::VLD1d16Qwb_fixed:
2486 case ARM::VLD1d32Qwb_fixed:
2487 case ARM::VLD1d64Qwb_fixed:
2488 case ARM::VLD1d8wb_register:
2489 case ARM::VLD1d16wb_register:
2490 case ARM::VLD1d32wb_register:
2491 case ARM::VLD1d64wb_register:
2492 case ARM::VLD1q8wb_fixed:
2493 case ARM::VLD1q16wb_fixed:
2494 case ARM::VLD1q32wb_fixed:
2495 case ARM::VLD1q64wb_fixed:
2496 case ARM::VLD1q8wb_register:
2497 case ARM::VLD1q16wb_register:
2498 case ARM::VLD1q32wb_register:
2499 case ARM::VLD1q64wb_register:
2500 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2501 // variant encodes Rm == 0xf. Anything else is a register offset post-
2502 // increment and we need to add the register operand to the instruction.
2503 if (Rm != 0xD && Rm != 0xF &&
2504 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2505 return MCDisassembler::Fail;
2507 case ARM::VLD2d8wb_fixed:
2508 case ARM::VLD2d16wb_fixed:
2509 case ARM::VLD2d32wb_fixed:
2510 case ARM::VLD2b8wb_fixed:
2511 case ARM::VLD2b16wb_fixed:
2512 case ARM::VLD2b32wb_fixed:
2513 case ARM::VLD2q8wb_fixed:
2514 case ARM::VLD2q16wb_fixed:
2515 case ARM::VLD2q32wb_fixed:
2522 static DecodeStatus DecodeVLDST1Instruction(MCInst &Inst, unsigned Insn,
2523 uint64_t Address, const void *Decoder) {
2524 unsigned type = fieldFromInstruction(Insn, 8, 4);
2525 unsigned align = fieldFromInstruction(Insn, 4, 2);
2526 if (type == 6 && (align & 2)) return MCDisassembler::Fail;
2527 if (type == 7 && (align & 2)) return MCDisassembler::Fail;
2528 if (type == 10 && align == 3) return MCDisassembler::Fail;
2530 unsigned load = fieldFromInstruction(Insn, 21, 1);
2531 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
2532 : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
2535 static DecodeStatus DecodeVLDST2Instruction(MCInst &Inst, unsigned Insn,
2536 uint64_t Address, const void *Decoder) {
2537 unsigned size = fieldFromInstruction(Insn, 6, 2);
2538 if (size == 3) return MCDisassembler::Fail;
2540 unsigned type = fieldFromInstruction(Insn, 8, 4);
2541 unsigned align = fieldFromInstruction(Insn, 4, 2);
2542 if (type == 8 && align == 3) return MCDisassembler::Fail;
2543 if (type == 9 && align == 3) return MCDisassembler::Fail;
2545 unsigned load = fieldFromInstruction(Insn, 21, 1);
2546 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
2547 : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
2550 static DecodeStatus DecodeVLDST3Instruction(MCInst &Inst, unsigned Insn,
2551 uint64_t Address, const void *Decoder) {
2552 unsigned size = fieldFromInstruction(Insn, 6, 2);
2553 if (size == 3) return MCDisassembler::Fail;
2555 unsigned align = fieldFromInstruction(Insn, 4, 2);
2556 if (align & 2) return MCDisassembler::Fail;
2558 unsigned load = fieldFromInstruction(Insn, 21, 1);
2559 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
2560 : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
2563 static DecodeStatus DecodeVLDST4Instruction(MCInst &Inst, unsigned Insn,
2564 uint64_t Address, const void *Decoder) {
2565 unsigned size = fieldFromInstruction(Insn, 6, 2);
2566 if (size == 3) return MCDisassembler::Fail;
2568 unsigned load = fieldFromInstruction(Insn, 21, 1);
2569 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
2570 : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
2573 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Insn,
2574 uint64_t Address, const void *Decoder) {
2575 DecodeStatus S = MCDisassembler::Success;
2577 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2578 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2579 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2580 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2581 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2582 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2584 // Writeback Operand
2585 switch (Inst.getOpcode()) {
2586 case ARM::VST1d8wb_fixed:
2587 case ARM::VST1d16wb_fixed:
2588 case ARM::VST1d32wb_fixed:
2589 case ARM::VST1d64wb_fixed:
2590 case ARM::VST1d8wb_register:
2591 case ARM::VST1d16wb_register:
2592 case ARM::VST1d32wb_register:
2593 case ARM::VST1d64wb_register:
2594 case ARM::VST1q8wb_fixed:
2595 case ARM::VST1q16wb_fixed:
2596 case ARM::VST1q32wb_fixed:
2597 case ARM::VST1q64wb_fixed:
2598 case ARM::VST1q8wb_register:
2599 case ARM::VST1q16wb_register:
2600 case ARM::VST1q32wb_register:
2601 case ARM::VST1q64wb_register:
2602 case ARM::VST1d8Twb_fixed:
2603 case ARM::VST1d16Twb_fixed:
2604 case ARM::VST1d32Twb_fixed:
2605 case ARM::VST1d64Twb_fixed:
2606 case ARM::VST1d8Twb_register:
2607 case ARM::VST1d16Twb_register:
2608 case ARM::VST1d32Twb_register:
2609 case ARM::VST1d64Twb_register:
2610 case ARM::VST1d8Qwb_fixed:
2611 case ARM::VST1d16Qwb_fixed:
2612 case ARM::VST1d32Qwb_fixed:
2613 case ARM::VST1d64Qwb_fixed:
2614 case ARM::VST1d8Qwb_register:
2615 case ARM::VST1d16Qwb_register:
2616 case ARM::VST1d32Qwb_register:
2617 case ARM::VST1d64Qwb_register:
2618 case ARM::VST2d8wb_fixed:
2619 case ARM::VST2d16wb_fixed:
2620 case ARM::VST2d32wb_fixed:
2621 case ARM::VST2d8wb_register:
2622 case ARM::VST2d16wb_register:
2623 case ARM::VST2d32wb_register:
2624 case ARM::VST2q8wb_fixed:
2625 case ARM::VST2q16wb_fixed:
2626 case ARM::VST2q32wb_fixed:
2627 case ARM::VST2q8wb_register:
2628 case ARM::VST2q16wb_register:
2629 case ARM::VST2q32wb_register:
2630 case ARM::VST2b8wb_fixed:
2631 case ARM::VST2b16wb_fixed:
2632 case ARM::VST2b32wb_fixed:
2633 case ARM::VST2b8wb_register:
2634 case ARM::VST2b16wb_register:
2635 case ARM::VST2b32wb_register:
2637 return MCDisassembler::Fail;
2638 Inst.addOperand(MCOperand::CreateImm(0));
2640 case ARM::VST3d8_UPD:
2641 case ARM::VST3d16_UPD:
2642 case ARM::VST3d32_UPD:
2643 case ARM::VST3q8_UPD:
2644 case ARM::VST3q16_UPD:
2645 case ARM::VST3q32_UPD:
2646 case ARM::VST4d8_UPD:
2647 case ARM::VST4d16_UPD:
2648 case ARM::VST4d32_UPD:
2649 case ARM::VST4q8_UPD:
2650 case ARM::VST4q16_UPD:
2651 case ARM::VST4q32_UPD:
2652 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2653 return MCDisassembler::Fail;
2659 // AddrMode6 Base (register+alignment)
2660 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2661 return MCDisassembler::Fail;
2663 // AddrMode6 Offset (register)
2664 switch (Inst.getOpcode()) {
2667 Inst.addOperand(MCOperand::CreateReg(0));
2668 else if (Rm != 0xF) {
2669 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2670 return MCDisassembler::Fail;
2673 case ARM::VST1d8wb_fixed:
2674 case ARM::VST1d16wb_fixed:
2675 case ARM::VST1d32wb_fixed:
2676 case ARM::VST1d64wb_fixed:
2677 case ARM::VST1q8wb_fixed:
2678 case ARM::VST1q16wb_fixed:
2679 case ARM::VST1q32wb_fixed:
2680 case ARM::VST1q64wb_fixed:
2681 case ARM::VST1d8Twb_fixed:
2682 case ARM::VST1d16Twb_fixed:
2683 case ARM::VST1d32Twb_fixed:
2684 case ARM::VST1d64Twb_fixed:
2685 case ARM::VST1d8Qwb_fixed:
2686 case ARM::VST1d16Qwb_fixed:
2687 case ARM::VST1d32Qwb_fixed:
2688 case ARM::VST1d64Qwb_fixed:
2689 case ARM::VST2d8wb_fixed:
2690 case ARM::VST2d16wb_fixed:
2691 case ARM::VST2d32wb_fixed:
2692 case ARM::VST2q8wb_fixed:
2693 case ARM::VST2q16wb_fixed:
2694 case ARM::VST2q32wb_fixed:
2695 case ARM::VST2b8wb_fixed:
2696 case ARM::VST2b16wb_fixed:
2697 case ARM::VST2b32wb_fixed:
2702 // First input register
2703 switch (Inst.getOpcode()) {
2708 case ARM::VST1q16wb_fixed:
2709 case ARM::VST1q16wb_register:
2710 case ARM::VST1q32wb_fixed:
2711 case ARM::VST1q32wb_register:
2712 case ARM::VST1q64wb_fixed:
2713 case ARM::VST1q64wb_register:
2714 case ARM::VST1q8wb_fixed:
2715 case ARM::VST1q8wb_register:
2719 case ARM::VST2d16wb_fixed:
2720 case ARM::VST2d16wb_register:
2721 case ARM::VST2d32wb_fixed:
2722 case ARM::VST2d32wb_register:
2723 case ARM::VST2d8wb_fixed:
2724 case ARM::VST2d8wb_register:
2725 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2726 return MCDisassembler::Fail;
2731 case ARM::VST2b16wb_fixed:
2732 case ARM::VST2b16wb_register:
2733 case ARM::VST2b32wb_fixed:
2734 case ARM::VST2b32wb_register:
2735 case ARM::VST2b8wb_fixed:
2736 case ARM::VST2b8wb_register:
2737 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2738 return MCDisassembler::Fail;
2741 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2742 return MCDisassembler::Fail;
2745 // Second input register
2746 switch (Inst.getOpcode()) {
2750 case ARM::VST3d8_UPD:
2751 case ARM::VST3d16_UPD:
2752 case ARM::VST3d32_UPD:
2756 case ARM::VST4d8_UPD:
2757 case ARM::VST4d16_UPD:
2758 case ARM::VST4d32_UPD:
2759 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2760 return MCDisassembler::Fail;
2765 case ARM::VST3q8_UPD:
2766 case ARM::VST3q16_UPD:
2767 case ARM::VST3q32_UPD:
2771 case ARM::VST4q8_UPD:
2772 case ARM::VST4q16_UPD:
2773 case ARM::VST4q32_UPD:
2774 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2775 return MCDisassembler::Fail;
2781 // Third input register
2782 switch (Inst.getOpcode()) {
2786 case ARM::VST3d8_UPD:
2787 case ARM::VST3d16_UPD:
2788 case ARM::VST3d32_UPD:
2792 case ARM::VST4d8_UPD:
2793 case ARM::VST4d16_UPD:
2794 case ARM::VST4d32_UPD:
2795 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2796 return MCDisassembler::Fail;
2801 case ARM::VST3q8_UPD:
2802 case ARM::VST3q16_UPD:
2803 case ARM::VST3q32_UPD:
2807 case ARM::VST4q8_UPD:
2808 case ARM::VST4q16_UPD:
2809 case ARM::VST4q32_UPD:
2810 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2811 return MCDisassembler::Fail;
2817 // Fourth input register
2818 switch (Inst.getOpcode()) {
2822 case ARM::VST4d8_UPD:
2823 case ARM::VST4d16_UPD:
2824 case ARM::VST4d32_UPD:
2825 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2826 return MCDisassembler::Fail;
2831 case ARM::VST4q8_UPD:
2832 case ARM::VST4q16_UPD:
2833 case ARM::VST4q32_UPD:
2834 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2835 return MCDisassembler::Fail;
2844 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Insn,
2845 uint64_t Address, const void *Decoder) {
2846 DecodeStatus S = MCDisassembler::Success;
2848 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2849 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2850 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2851 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2852 unsigned align = fieldFromInstruction(Insn, 4, 1);
2853 unsigned size = fieldFromInstruction(Insn, 6, 2);
2855 if (size == 0 && align == 1)
2856 return MCDisassembler::Fail;
2857 align *= (1 << size);
2859 switch (Inst.getOpcode()) {
2860 case ARM::VLD1DUPq16: case ARM::VLD1DUPq32: case ARM::VLD1DUPq8:
2861 case ARM::VLD1DUPq16wb_fixed: case ARM::VLD1DUPq16wb_register:
2862 case ARM::VLD1DUPq32wb_fixed: case ARM::VLD1DUPq32wb_register:
2863 case ARM::VLD1DUPq8wb_fixed: case ARM::VLD1DUPq8wb_register:
2864 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2865 return MCDisassembler::Fail;
2868 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2869 return MCDisassembler::Fail;
2873 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2874 return MCDisassembler::Fail;
2877 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2878 return MCDisassembler::Fail;
2879 Inst.addOperand(MCOperand::CreateImm(align));
2881 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2882 // variant encodes Rm == 0xf. Anything else is a register offset post-
2883 // increment and we need to add the register operand to the instruction.
2884 if (Rm != 0xD && Rm != 0xF &&
2885 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2886 return MCDisassembler::Fail;
2891 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Insn,
2892 uint64_t Address, const void *Decoder) {
2893 DecodeStatus S = MCDisassembler::Success;
2895 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2896 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2897 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2898 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2899 unsigned align = fieldFromInstruction(Insn, 4, 1);
2900 unsigned size = 1 << fieldFromInstruction(Insn, 6, 2);
2903 switch (Inst.getOpcode()) {
2904 case ARM::VLD2DUPd16: case ARM::VLD2DUPd32: case ARM::VLD2DUPd8:
2905 case ARM::VLD2DUPd16wb_fixed: case ARM::VLD2DUPd16wb_register:
2906 case ARM::VLD2DUPd32wb_fixed: case ARM::VLD2DUPd32wb_register:
2907 case ARM::VLD2DUPd8wb_fixed: case ARM::VLD2DUPd8wb_register:
2908 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2909 return MCDisassembler::Fail;
2911 case ARM::VLD2DUPd16x2: case ARM::VLD2DUPd32x2: case ARM::VLD2DUPd8x2:
2912 case ARM::VLD2DUPd16x2wb_fixed: case ARM::VLD2DUPd16x2wb_register:
2913 case ARM::VLD2DUPd32x2wb_fixed: case ARM::VLD2DUPd32x2wb_register:
2914 case ARM::VLD2DUPd8x2wb_fixed: case ARM::VLD2DUPd8x2wb_register:
2915 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2916 return MCDisassembler::Fail;
2919 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2920 return MCDisassembler::Fail;
2925 Inst.addOperand(MCOperand::CreateImm(0));
2927 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2928 return MCDisassembler::Fail;
2929 Inst.addOperand(MCOperand::CreateImm(align));
2931 if (Rm != 0xD && Rm != 0xF) {
2932 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2933 return MCDisassembler::Fail;
2939 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Insn,
2940 uint64_t Address, const void *Decoder) {
2941 DecodeStatus S = MCDisassembler::Success;
2943 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2944 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2945 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2946 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2947 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
2949 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2950 return MCDisassembler::Fail;
2951 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2952 return MCDisassembler::Fail;
2953 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2954 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(0));
2965 Inst.addOperand(MCOperand::CreateReg(0));
2966 else if (Rm != 0xF) {
2967 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2968 return MCDisassembler::Fail;
2974 static DecodeStatus DecodeVLD4DupInstruction(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 size = fieldFromInstruction(Insn, 6, 2);
2983 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
2984 unsigned align = fieldFromInstruction(Insn, 4, 1);
2988 return MCDisassembler::Fail;
2999 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3000 return MCDisassembler::Fail;
3001 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
3002 return MCDisassembler::Fail;
3003 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
3004 return MCDisassembler::Fail;
3005 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
3006 return MCDisassembler::Fail;
3008 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3009 return MCDisassembler::Fail;
3012 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3013 return MCDisassembler::Fail;
3014 Inst.addOperand(MCOperand::CreateImm(align));
3017 Inst.addOperand(MCOperand::CreateReg(0));
3018 else if (Rm != 0xF) {
3019 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3020 return MCDisassembler::Fail;
3027 DecodeNEONModImmInstruction(MCInst &Inst, unsigned Insn,
3028 uint64_t Address, const void *Decoder) {
3029 DecodeStatus S = MCDisassembler::Success;
3031 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3032 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3033 unsigned imm = fieldFromInstruction(Insn, 0, 4);
3034 imm |= fieldFromInstruction(Insn, 16, 3) << 4;
3035 imm |= fieldFromInstruction(Insn, 24, 1) << 7;
3036 imm |= fieldFromInstruction(Insn, 8, 4) << 8;
3037 imm |= fieldFromInstruction(Insn, 5, 1) << 12;
3038 unsigned Q = fieldFromInstruction(Insn, 6, 1);
3041 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
3042 return MCDisassembler::Fail;
3044 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3045 return MCDisassembler::Fail;
3048 Inst.addOperand(MCOperand::CreateImm(imm));
3050 switch (Inst.getOpcode()) {
3051 case ARM::VORRiv4i16:
3052 case ARM::VORRiv2i32:
3053 case ARM::VBICiv4i16:
3054 case ARM::VBICiv2i32:
3055 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3056 return MCDisassembler::Fail;
3058 case ARM::VORRiv8i16:
3059 case ARM::VORRiv4i32:
3060 case ARM::VBICiv8i16:
3061 case ARM::VBICiv4i32:
3062 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
3063 return MCDisassembler::Fail;
3072 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Insn,
3073 uint64_t Address, const void *Decoder) {
3074 DecodeStatus S = MCDisassembler::Success;
3076 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3077 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3078 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3079 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
3080 unsigned size = fieldFromInstruction(Insn, 18, 2);
3082 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
3083 return MCDisassembler::Fail;
3084 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
3085 return MCDisassembler::Fail;
3086 Inst.addOperand(MCOperand::CreateImm(8 << size));
3091 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
3092 uint64_t Address, const void *Decoder) {
3093 Inst.addOperand(MCOperand::CreateImm(8 - Val));
3094 return MCDisassembler::Success;
3097 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
3098 uint64_t Address, const void *Decoder) {
3099 Inst.addOperand(MCOperand::CreateImm(16 - Val));
3100 return MCDisassembler::Success;
3103 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
3104 uint64_t Address, const void *Decoder) {
3105 Inst.addOperand(MCOperand::CreateImm(32 - Val));
3106 return MCDisassembler::Success;
3109 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
3110 uint64_t Address, const void *Decoder) {
3111 Inst.addOperand(MCOperand::CreateImm(64 - Val));
3112 return MCDisassembler::Success;
3115 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
3116 uint64_t Address, const void *Decoder) {
3117 DecodeStatus S = MCDisassembler::Success;
3119 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3120 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3121 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3122 Rn |= fieldFromInstruction(Insn, 7, 1) << 4;
3123 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3124 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
3125 unsigned op = fieldFromInstruction(Insn, 6, 1);
3127 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3128 return MCDisassembler::Fail;
3130 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3131 return MCDisassembler::Fail; // Writeback
3134 switch (Inst.getOpcode()) {
3137 if (!Check(S, DecodeDPairRegisterClass(Inst, Rn, Address, Decoder)))
3138 return MCDisassembler::Fail;
3141 if (!Check(S, DecodeDPRRegisterClass(Inst, Rn, Address, Decoder)))
3142 return MCDisassembler::Fail;
3145 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
3146 return MCDisassembler::Fail;
3151 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
3152 uint64_t Address, const void *Decoder) {
3153 DecodeStatus S = MCDisassembler::Success;
3155 unsigned dst = fieldFromInstruction(Insn, 8, 3);
3156 unsigned imm = fieldFromInstruction(Insn, 0, 8);
3158 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
3159 return MCDisassembler::Fail;
3161 switch(Inst.getOpcode()) {
3163 return MCDisassembler::Fail;
3165 break; // tADR does not explicitly represent the PC as an operand.
3167 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3171 Inst.addOperand(MCOperand::CreateImm(imm));
3175 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
3176 uint64_t Address, const void *Decoder) {
3177 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<12>(Val<<1) + 4,
3178 true, 2, Inst, Decoder))
3179 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
3180 return MCDisassembler::Success;
3183 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
3184 uint64_t Address, const void *Decoder) {
3185 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<21>(Val) + 4,
3186 true, 4, Inst, Decoder))
3187 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
3188 return MCDisassembler::Success;
3191 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
3192 uint64_t Address, const void *Decoder) {
3193 if (!tryAddingSymbolicOperand(Address, Address + (Val<<1) + 4,
3194 true, 2, Inst, Decoder))
3195 Inst.addOperand(MCOperand::CreateImm(Val << 1));
3196 return MCDisassembler::Success;
3199 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
3200 uint64_t Address, const void *Decoder) {
3201 DecodeStatus S = MCDisassembler::Success;
3203 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3204 unsigned Rm = fieldFromInstruction(Val, 3, 3);
3206 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3207 return MCDisassembler::Fail;
3208 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
3209 return MCDisassembler::Fail;
3214 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
3215 uint64_t Address, const void *Decoder) {
3216 DecodeStatus S = MCDisassembler::Success;
3218 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3219 unsigned imm = fieldFromInstruction(Val, 3, 5);
3221 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3222 return MCDisassembler::Fail;
3223 Inst.addOperand(MCOperand::CreateImm(imm));
3228 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
3229 uint64_t Address, const void *Decoder) {
3230 unsigned imm = Val << 2;
3232 Inst.addOperand(MCOperand::CreateImm(imm));
3233 tryAddingPcLoadReferenceComment(Address, (Address & ~2u) + imm + 4, Decoder);
3235 return MCDisassembler::Success;
3238 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
3239 uint64_t Address, const void *Decoder) {
3240 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3241 Inst.addOperand(MCOperand::CreateImm(Val));
3243 return MCDisassembler::Success;
3246 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
3247 uint64_t Address, const void *Decoder) {
3248 DecodeStatus S = MCDisassembler::Success;
3250 unsigned Rn = fieldFromInstruction(Val, 6, 4);
3251 unsigned Rm = fieldFromInstruction(Val, 2, 4);
3252 unsigned imm = fieldFromInstruction(Val, 0, 2);
3254 // Thumb stores cannot use PC as dest register.
3255 switch (Inst.getOpcode()) {
3260 return MCDisassembler::Fail;
3265 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3266 return MCDisassembler::Fail;
3267 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3268 return MCDisassembler::Fail;
3269 Inst.addOperand(MCOperand::CreateImm(imm));
3274 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Insn,
3275 uint64_t Address, const void *Decoder) {
3276 DecodeStatus S = MCDisassembler::Success;
3278 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3279 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3281 uint64_t featureBits = ((const MCDisassembler*)Decoder)->getSubtargetInfo()
3283 bool hasMP = featureBits & ARM::FeatureMP;
3284 bool hasV7Ops = featureBits & ARM::HasV7Ops;
3287 switch (Inst.getOpcode()) {
3289 Inst.setOpcode(ARM::t2LDRBpci);
3292 Inst.setOpcode(ARM::t2LDRHpci);
3295 Inst.setOpcode(ARM::t2LDRSHpci);
3298 Inst.setOpcode(ARM::t2LDRSBpci);
3301 Inst.setOpcode(ARM::t2LDRpci);
3304 Inst.setOpcode(ARM::t2PLDpci);
3307 Inst.setOpcode(ARM::t2PLIpci);
3310 return MCDisassembler::Fail;
3313 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3317 switch (Inst.getOpcode()) {
3319 return MCDisassembler::Fail;
3321 Inst.setOpcode(ARM::t2PLDWs);
3324 Inst.setOpcode(ARM::t2PLIs);
3330 switch (Inst.getOpcode()) {
3335 return MCDisassembler::Fail;
3338 if (!hasV7Ops || !hasMP)
3339 return MCDisassembler::Fail;
3342 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3343 return MCDisassembler::Fail;
3346 unsigned addrmode = fieldFromInstruction(Insn, 4, 2);
3347 addrmode |= fieldFromInstruction(Insn, 0, 4) << 2;
3348 addrmode |= fieldFromInstruction(Insn, 16, 4) << 6;
3349 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
3350 return MCDisassembler::Fail;
3355 static DecodeStatus DecodeT2LoadImm8(MCInst &Inst, unsigned Insn,
3356 uint64_t Address, const void* Decoder) {
3357 DecodeStatus S = MCDisassembler::Success;
3359 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3360 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3361 unsigned U = fieldFromInstruction(Insn, 9, 1);
3362 unsigned imm = fieldFromInstruction(Insn, 0, 8);
3365 unsigned add = fieldFromInstruction(Insn, 9, 1);
3367 uint64_t featureBits = ((const MCDisassembler*)Decoder)->getSubtargetInfo()
3369 bool hasMP = featureBits & ARM::FeatureMP;
3370 bool hasV7Ops = featureBits & ARM::HasV7Ops;
3373 switch (Inst.getOpcode()) {
3375 Inst.setOpcode(ARM::t2LDRpci);
3378 Inst.setOpcode(ARM::t2LDRBpci);
3380 case ARM::t2LDRSBi8:
3381 Inst.setOpcode(ARM::t2LDRSBpci);
3384 Inst.setOpcode(ARM::t2LDRHpci);
3386 case ARM::t2LDRSHi8:
3387 Inst.setOpcode(ARM::t2LDRSHpci);
3390 Inst.setOpcode(ARM::t2PLDpci);
3393 Inst.setOpcode(ARM::t2PLIpci);
3396 return MCDisassembler::Fail;
3398 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3402 switch (Inst.getOpcode()) {
3403 case ARM::t2LDRSHi8:
3404 return MCDisassembler::Fail;
3407 Inst.setOpcode(ARM::t2PLDWi8);
3409 case ARM::t2LDRSBi8:
3410 Inst.setOpcode(ARM::t2PLIi8);
3417 switch (Inst.getOpcode()) {
3422 return MCDisassembler::Fail;
3425 if (!hasV7Ops || !hasMP)
3426 return MCDisassembler::Fail;
3429 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3430 return MCDisassembler::Fail;
3433 if (!Check(S, DecodeT2AddrModeImm8(Inst, imm, Address, Decoder)))
3434 return MCDisassembler::Fail;
3438 static DecodeStatus DecodeT2LoadImm12(MCInst &Inst, unsigned Insn,
3439 uint64_t Address, const void* Decoder) {
3440 DecodeStatus S = MCDisassembler::Success;
3442 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3443 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3444 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3447 uint64_t featureBits = ((const MCDisassembler*)Decoder)->getSubtargetInfo()
3449 bool hasMP = (featureBits & ARM::FeatureMP);
3450 bool hasV7Ops = (featureBits & ARM::HasV7Ops);
3453 switch (Inst.getOpcode()) {
3455 Inst.setOpcode(ARM::t2LDRpci);
3457 case ARM::t2LDRHi12:
3458 Inst.setOpcode(ARM::t2LDRHpci);
3460 case ARM::t2LDRSHi12:
3461 Inst.setOpcode(ARM::t2LDRSHpci);
3463 case ARM::t2LDRBi12:
3464 Inst.setOpcode(ARM::t2LDRBpci);
3466 case ARM::t2LDRSBi12:
3467 Inst.setOpcode(ARM::t2LDRSBpci);
3470 Inst.setOpcode(ARM::t2PLDpci);
3473 Inst.setOpcode(ARM::t2PLIpci);
3476 return MCDisassembler::Fail;
3478 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3482 switch (Inst.getOpcode()) {
3483 case ARM::t2LDRSHi12:
3484 return MCDisassembler::Fail;
3485 case ARM::t2LDRHi12:
3486 Inst.setOpcode(ARM::t2PLDWi12);
3488 case ARM::t2LDRSBi12:
3489 Inst.setOpcode(ARM::t2PLIi12);
3496 switch (Inst.getOpcode()) {
3501 return MCDisassembler::Fail;
3503 case ARM::t2PLDWi12:
3504 if (!hasV7Ops || !hasMP)
3505 return MCDisassembler::Fail;
3508 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3509 return MCDisassembler::Fail;
3512 if (!Check(S, DecodeT2AddrModeImm12(Inst, imm, Address, Decoder)))
3513 return MCDisassembler::Fail;
3517 static DecodeStatus DecodeT2LoadT(MCInst &Inst, unsigned Insn,
3518 uint64_t Address, const void* Decoder) {
3519 DecodeStatus S = MCDisassembler::Success;
3521 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3522 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3523 unsigned imm = fieldFromInstruction(Insn, 0, 8);
3527 switch (Inst.getOpcode()) {
3529 Inst.setOpcode(ARM::t2LDRpci);
3532 Inst.setOpcode(ARM::t2LDRBpci);
3535 Inst.setOpcode(ARM::t2LDRHpci);
3538 Inst.setOpcode(ARM::t2LDRSBpci);
3541 Inst.setOpcode(ARM::t2LDRSHpci);
3544 return MCDisassembler::Fail;
3546 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3549 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3550 return MCDisassembler::Fail;
3551 if (!Check(S, DecodeT2AddrModeImm8(Inst, imm, Address, Decoder)))
3552 return MCDisassembler::Fail;
3556 static DecodeStatus DecodeT2LoadLabel(MCInst &Inst, unsigned Insn,
3557 uint64_t Address, const void* Decoder) {
3558 DecodeStatus S = MCDisassembler::Success;
3560 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3561 unsigned U = fieldFromInstruction(Insn, 23, 1);
3562 int imm = fieldFromInstruction(Insn, 0, 12);
3564 uint64_t featureBits = ((const MCDisassembler*)Decoder)->getSubtargetInfo()
3566 bool hasV7Ops = (featureBits & ARM::HasV7Ops);
3569 switch (Inst.getOpcode()) {
3570 case ARM::t2LDRBpci:
3571 case ARM::t2LDRHpci:
3572 Inst.setOpcode(ARM::t2PLDpci);
3574 case ARM::t2LDRSBpci:
3575 Inst.setOpcode(ARM::t2PLIpci);
3577 case ARM::t2LDRSHpci:
3578 return MCDisassembler::Fail;
3584 switch(Inst.getOpcode()) {
3589 return MCDisassembler::Fail;
3592 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3593 return MCDisassembler::Fail;
3597 // Special case for #-0.
3603 Inst.addOperand(MCOperand::CreateImm(imm));
3608 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
3609 uint64_t Address, const void *Decoder) {
3611 Inst.addOperand(MCOperand::CreateImm(INT32_MIN));
3613 int imm = Val & 0xFF;
3615 if (!(Val & 0x100)) imm *= -1;
3616 Inst.addOperand(MCOperand::CreateImm(imm * 4));
3619 return MCDisassembler::Success;
3622 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
3623 uint64_t Address, const void *Decoder) {
3624 DecodeStatus S = MCDisassembler::Success;
3626 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3627 unsigned imm = fieldFromInstruction(Val, 0, 9);
3629 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3630 return MCDisassembler::Fail;
3631 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
3632 return MCDisassembler::Fail;
3637 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
3638 uint64_t Address, const void *Decoder) {
3639 DecodeStatus S = MCDisassembler::Success;
3641 unsigned Rn = fieldFromInstruction(Val, 8, 4);
3642 unsigned imm = fieldFromInstruction(Val, 0, 8);
3644 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
3645 return MCDisassembler::Fail;
3647 Inst.addOperand(MCOperand::CreateImm(imm));
3652 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
3653 uint64_t Address, const void *Decoder) {
3654 int imm = Val & 0xFF;
3657 else if (!(Val & 0x100))
3659 Inst.addOperand(MCOperand::CreateImm(imm));
3661 return MCDisassembler::Success;
3665 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
3666 uint64_t Address, const void *Decoder) {
3667 DecodeStatus S = MCDisassembler::Success;
3669 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3670 unsigned imm = fieldFromInstruction(Val, 0, 9);
3672 // Thumb stores cannot use PC as dest register.
3673 switch (Inst.getOpcode()) {
3681 return MCDisassembler::Fail;
3687 // Some instructions always use an additive offset.
3688 switch (Inst.getOpcode()) {
3703 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3704 return MCDisassembler::Fail;
3705 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
3706 return MCDisassembler::Fail;
3711 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Insn,
3712 uint64_t Address, const void *Decoder) {
3713 DecodeStatus S = MCDisassembler::Success;
3715 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3716 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3717 unsigned addr = fieldFromInstruction(Insn, 0, 8);
3718 addr |= fieldFromInstruction(Insn, 9, 1) << 8;
3720 unsigned load = fieldFromInstruction(Insn, 20, 1);
3723 switch (Inst.getOpcode()) {
3724 case ARM::t2LDR_PRE:
3725 case ARM::t2LDR_POST:
3726 Inst.setOpcode(ARM::t2LDRpci);
3728 case ARM::t2LDRB_PRE:
3729 case ARM::t2LDRB_POST:
3730 Inst.setOpcode(ARM::t2LDRBpci);
3732 case ARM::t2LDRH_PRE:
3733 case ARM::t2LDRH_POST:
3734 Inst.setOpcode(ARM::t2LDRHpci);
3736 case ARM::t2LDRSB_PRE:
3737 case ARM::t2LDRSB_POST:
3739 Inst.setOpcode(ARM::t2PLIpci);
3741 Inst.setOpcode(ARM::t2LDRSBpci);
3743 case ARM::t2LDRSH_PRE:
3744 case ARM::t2LDRSH_POST:
3745 Inst.setOpcode(ARM::t2LDRSHpci);
3748 return MCDisassembler::Fail;
3750 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3754 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3755 return MCDisassembler::Fail;
3758 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3759 return MCDisassembler::Fail;
3762 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3763 return MCDisassembler::Fail;
3766 if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
3767 return MCDisassembler::Fail;
3772 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
3773 uint64_t Address, const void *Decoder) {
3774 DecodeStatus S = MCDisassembler::Success;
3776 unsigned Rn = fieldFromInstruction(Val, 13, 4);
3777 unsigned imm = fieldFromInstruction(Val, 0, 12);
3779 // Thumb stores cannot use PC as dest register.
3780 switch (Inst.getOpcode()) {
3782 case ARM::t2STRBi12:
3783 case ARM::t2STRHi12:
3785 return MCDisassembler::Fail;
3790 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3791 return MCDisassembler::Fail;
3792 Inst.addOperand(MCOperand::CreateImm(imm));
3798 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Insn,
3799 uint64_t Address, const void *Decoder) {
3800 unsigned imm = fieldFromInstruction(Insn, 0, 7);
3802 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3803 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3804 Inst.addOperand(MCOperand::CreateImm(imm));
3806 return MCDisassembler::Success;
3809 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
3810 uint64_t Address, const void *Decoder) {
3811 DecodeStatus S = MCDisassembler::Success;
3813 if (Inst.getOpcode() == ARM::tADDrSP) {
3814 unsigned Rdm = fieldFromInstruction(Insn, 0, 3);
3815 Rdm |= fieldFromInstruction(Insn, 7, 1) << 3;
3817 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3818 return MCDisassembler::Fail;
3819 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3820 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3821 return MCDisassembler::Fail;
3822 } else if (Inst.getOpcode() == ARM::tADDspr) {
3823 unsigned Rm = fieldFromInstruction(Insn, 3, 4);
3825 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3826 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3827 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3828 return MCDisassembler::Fail;
3834 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
3835 uint64_t Address, const void *Decoder) {
3836 unsigned imod = fieldFromInstruction(Insn, 4, 1) | 0x2;
3837 unsigned flags = fieldFromInstruction(Insn, 0, 3);
3839 Inst.addOperand(MCOperand::CreateImm(imod));
3840 Inst.addOperand(MCOperand::CreateImm(flags));
3842 return MCDisassembler::Success;
3845 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
3846 uint64_t Address, const void *Decoder) {
3847 DecodeStatus S = MCDisassembler::Success;
3848 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3849 unsigned add = fieldFromInstruction(Insn, 4, 1);
3851 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
3852 return MCDisassembler::Fail;
3853 Inst.addOperand(MCOperand::CreateImm(add));
3858 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Val,
3859 uint64_t Address, const void *Decoder) {
3860 // Val is passed in as S:J1:J2:imm10H:imm10L:'0'
3861 // Note only one trailing zero not two. Also the J1 and J2 values are from
3862 // the encoded instruction. So here change to I1 and I2 values via:
3863 // I1 = NOT(J1 EOR S);
3864 // I2 = NOT(J2 EOR S);
3865 // and build the imm32 with two trailing zeros as documented:
3866 // imm32 = SignExtend(S:I1:I2:imm10H:imm10L:'00', 32);
3867 unsigned S = (Val >> 23) & 1;
3868 unsigned J1 = (Val >> 22) & 1;
3869 unsigned J2 = (Val >> 21) & 1;
3870 unsigned I1 = !(J1 ^ S);
3871 unsigned I2 = !(J2 ^ S);
3872 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
3873 int imm32 = SignExtend32<25>(tmp << 1);
3875 if (!tryAddingSymbolicOperand(Address,
3876 (Address & ~2u) + imm32 + 4,
3877 true, 4, Inst, Decoder))
3878 Inst.addOperand(MCOperand::CreateImm(imm32));
3879 return MCDisassembler::Success;
3882 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Val,
3883 uint64_t Address, const void *Decoder) {
3884 if (Val == 0xA || Val == 0xB)
3885 return MCDisassembler::Fail;
3887 uint64_t featureBits = ((const MCDisassembler*)Decoder)->getSubtargetInfo()
3889 if ((featureBits & ARM::HasV8Ops) && !(Val == 14 || Val == 15))
3890 return MCDisassembler::Fail;
3892 Inst.addOperand(MCOperand::CreateImm(Val));
3893 return MCDisassembler::Success;
3897 DecodeThumbTableBranch(MCInst &Inst, unsigned Insn,
3898 uint64_t Address, const void *Decoder) {
3899 DecodeStatus S = MCDisassembler::Success;
3901 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3902 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3904 if (Rn == ARM::SP) S = MCDisassembler::SoftFail;
3905 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3906 return MCDisassembler::Fail;
3907 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3908 return MCDisassembler::Fail;
3913 DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Insn,
3914 uint64_t Address, const void *Decoder) {
3915 DecodeStatus S = MCDisassembler::Success;
3917 unsigned pred = fieldFromInstruction(Insn, 22, 4);
3918 if (pred == 0xE || pred == 0xF) {
3919 unsigned opc = fieldFromInstruction(Insn, 4, 28);
3922 return MCDisassembler::Fail;
3924 Inst.setOpcode(ARM::t2DSB);
3927 Inst.setOpcode(ARM::t2DMB);
3930 Inst.setOpcode(ARM::t2ISB);
3934 unsigned imm = fieldFromInstruction(Insn, 0, 4);
3935 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
3938 unsigned brtarget = fieldFromInstruction(Insn, 0, 11) << 1;
3939 brtarget |= fieldFromInstruction(Insn, 11, 1) << 19;
3940 brtarget |= fieldFromInstruction(Insn, 13, 1) << 18;
3941 brtarget |= fieldFromInstruction(Insn, 16, 6) << 12;
3942 brtarget |= fieldFromInstruction(Insn, 26, 1) << 20;
3944 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
3945 return MCDisassembler::Fail;
3946 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3947 return MCDisassembler::Fail;
3952 // Decode a shifted immediate operand. These basically consist
3953 // of an 8-bit value, and a 4-bit directive that specifies either
3954 // a splat operation or a rotation.
3955 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
3956 uint64_t Address, const void *Decoder) {
3957 unsigned ctrl = fieldFromInstruction(Val, 10, 2);
3959 unsigned byte = fieldFromInstruction(Val, 8, 2);
3960 unsigned imm = fieldFromInstruction(Val, 0, 8);
3963 Inst.addOperand(MCOperand::CreateImm(imm));
3966 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
3969 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
3972 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
3977 unsigned unrot = fieldFromInstruction(Val, 0, 7) | 0x80;
3978 unsigned rot = fieldFromInstruction(Val, 7, 5);
3979 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
3980 Inst.addOperand(MCOperand::CreateImm(imm));
3983 return MCDisassembler::Success;
3987 DecodeThumbBCCTargetOperand(MCInst &Inst, unsigned Val,
3988 uint64_t Address, const void *Decoder){
3989 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<9>(Val<<1) + 4,
3990 true, 2, Inst, Decoder))
3991 Inst.addOperand(MCOperand::CreateImm(SignExtend32<9>(Val << 1)));
3992 return MCDisassembler::Success;
3995 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
3996 uint64_t Address, const void *Decoder){
3997 // Val is passed in as S:J1:J2:imm10:imm11
3998 // Note no trailing zero after imm11. Also the J1 and J2 values are from
3999 // the encoded instruction. So here change to I1 and I2 values via:
4000 // I1 = NOT(J1 EOR S);
4001 // I2 = NOT(J2 EOR S);
4002 // and build the imm32 with one trailing zero as documented:
4003 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
4004 unsigned S = (Val >> 23) & 1;
4005 unsigned J1 = (Val >> 22) & 1;
4006 unsigned J2 = (Val >> 21) & 1;
4007 unsigned I1 = !(J1 ^ S);
4008 unsigned I2 = !(J2 ^ S);
4009 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
4010 int imm32 = SignExtend32<25>(tmp << 1);
4012 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
4013 true, 4, Inst, Decoder))
4014 Inst.addOperand(MCOperand::CreateImm(imm32));
4015 return MCDisassembler::Success;
4018 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Val,
4019 uint64_t Address, const void *Decoder) {
4021 return MCDisassembler::Fail;
4023 Inst.addOperand(MCOperand::CreateImm(Val));
4024 return MCDisassembler::Success;
4027 static DecodeStatus DecodeInstSyncBarrierOption(MCInst &Inst, unsigned Val,
4028 uint64_t Address, const void *Decoder) {
4030 return MCDisassembler::Fail;
4032 Inst.addOperand(MCOperand::CreateImm(Val));
4033 return MCDisassembler::Success;
4036 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Val,
4037 uint64_t Address, const void *Decoder) {
4038 DecodeStatus S = MCDisassembler::Success;
4039 uint64_t FeatureBits = ((const MCDisassembler*)Decoder)->getSubtargetInfo()
4041 if (FeatureBits & ARM::FeatureMClass) {
4042 unsigned ValLow = Val & 0xff;
4044 // Validate the SYSm value first.
4059 case 18: // basepri_max
4060 case 19: // faultmask
4061 if (!(FeatureBits & ARM::HasV7Ops))
4062 // Values basepri, basepri_max and faultmask are only valid for v7m.
4063 return MCDisassembler::Fail;
4066 return MCDisassembler::Fail;
4069 if (Inst.getOpcode() == ARM::t2MSR_M) {
4070 unsigned Mask = fieldFromInstruction(Val, 10, 2);
4071 if (!(FeatureBits & ARM::HasV7Ops)) {
4072 // The ARMv6-M MSR bits {11-10} can be only 0b10, other values are
4075 S = MCDisassembler::SoftFail;
4078 // The ARMv7-M architecture stores an additional 2-bit mask value in
4079 // MSR bits {11-10}. The mask is used only with apsr, iapsr, eapsr and
4080 // xpsr, it has to be 0b10 in other cases. Bit mask{1} indicates if
4081 // the NZCVQ bits should be moved by the instruction. Bit mask{0}
4082 // indicates the move for the GE{3:0} bits, the mask{0} bit can be set
4083 // only if the processor includes the DSP extension.
4084 if (Mask == 0 || (Mask != 2 && ValLow > 3) ||
4085 (!(FeatureBits & ARM::FeatureDSPThumb2) && (Mask & 1)))
4086 S = MCDisassembler::SoftFail;
4092 return MCDisassembler::Fail;
4094 Inst.addOperand(MCOperand::CreateImm(Val));
4098 static DecodeStatus DecodeBankedReg(MCInst &Inst, unsigned Val,
4099 uint64_t Address, const void *Decoder) {
4101 unsigned R = fieldFromInstruction(Val, 5, 1);
4102 unsigned SysM = fieldFromInstruction(Val, 0, 5);
4104 // The table of encodings for these banked registers comes from B9.2.3 of the
4105 // ARM ARM. There are patterns, but nothing regular enough to make this logic
4106 // neater. So by fiat, these values are UNPREDICTABLE:
4108 if (SysM == 0x7 || SysM == 0xf || SysM == 0x18 || SysM == 0x19 ||
4109 SysM == 0x1a || SysM == 0x1b)
4110 return MCDisassembler::SoftFail;
4112 if (SysM != 0xe && SysM != 0x10 && SysM != 0x12 && SysM != 0x14 &&
4113 SysM != 0x16 && SysM != 0x1c && SysM != 0x1e)
4114 return MCDisassembler::SoftFail;
4117 Inst.addOperand(MCOperand::CreateImm(Val));
4118 return MCDisassembler::Success;
4121 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
4122 uint64_t Address, const void *Decoder) {
4123 DecodeStatus S = MCDisassembler::Success;
4125 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4126 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4127 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4130 S = MCDisassembler::SoftFail;
4132 if (!Check(S, DecodeGPRPairRegisterClass(Inst, Rt, Address, Decoder)))
4133 return MCDisassembler::Fail;
4134 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4135 return MCDisassembler::Fail;
4136 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4137 return MCDisassembler::Fail;
4142 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
4143 uint64_t Address, const void *Decoder){
4144 DecodeStatus S = MCDisassembler::Success;
4146 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4147 unsigned Rt = fieldFromInstruction(Insn, 0, 4);
4148 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4149 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4151 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
4152 return MCDisassembler::Fail;
4154 if (Rn == 0xF || Rd == Rn || Rd == Rt || Rd == Rt+1)
4155 S = MCDisassembler::SoftFail;
4157 if (!Check(S, DecodeGPRPairRegisterClass(Inst, Rt, Address, Decoder)))
4158 return MCDisassembler::Fail;
4159 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4160 return MCDisassembler::Fail;
4161 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4162 return MCDisassembler::Fail;
4167 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
4168 uint64_t Address, const void *Decoder) {
4169 DecodeStatus S = MCDisassembler::Success;
4171 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4172 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4173 unsigned imm = fieldFromInstruction(Insn, 0, 12);
4174 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
4175 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
4176 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4178 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
4180 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
4181 return MCDisassembler::Fail;
4182 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4183 return MCDisassembler::Fail;
4184 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
4185 return MCDisassembler::Fail;
4186 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4187 return MCDisassembler::Fail;
4192 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
4193 uint64_t Address, const void *Decoder) {
4194 DecodeStatus S = MCDisassembler::Success;
4196 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4197 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4198 unsigned imm = fieldFromInstruction(Insn, 0, 12);
4199 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
4200 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
4201 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4202 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4204 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
4205 if (Rm == 0xF) S = MCDisassembler::SoftFail;
4207 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
4208 return MCDisassembler::Fail;
4209 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4210 return MCDisassembler::Fail;
4211 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
4212 return MCDisassembler::Fail;
4213 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4214 return MCDisassembler::Fail;
4220 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
4221 uint64_t Address, const void *Decoder) {
4222 DecodeStatus S = MCDisassembler::Success;
4224 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4225 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4226 unsigned imm = fieldFromInstruction(Insn, 0, 12);
4227 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
4228 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
4229 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4231 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
4233 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4234 return MCDisassembler::Fail;
4235 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
4236 return MCDisassembler::Fail;
4237 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
4238 return MCDisassembler::Fail;
4239 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4240 return MCDisassembler::Fail;
4245 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
4246 uint64_t Address, const void *Decoder) {
4247 DecodeStatus S = MCDisassembler::Success;
4249 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4250 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4251 unsigned imm = fieldFromInstruction(Insn, 0, 12);
4252 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
4253 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
4254 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4256 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
4258 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4259 return MCDisassembler::Fail;
4260 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
4261 return MCDisassembler::Fail;
4262 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
4263 return MCDisassembler::Fail;
4264 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4265 return MCDisassembler::Fail;
4270 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
4271 uint64_t Address, const void *Decoder) {
4272 DecodeStatus S = MCDisassembler::Success;
4274 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4275 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4276 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4277 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4278 unsigned size = fieldFromInstruction(Insn, 10, 2);
4284 return MCDisassembler::Fail;
4286 if (fieldFromInstruction(Insn, 4, 1))
4287 return MCDisassembler::Fail; // UNDEFINED
4288 index = fieldFromInstruction(Insn, 5, 3);
4291 if (fieldFromInstruction(Insn, 5, 1))
4292 return MCDisassembler::Fail; // UNDEFINED
4293 index = fieldFromInstruction(Insn, 6, 2);
4294 if (fieldFromInstruction(Insn, 4, 1))
4298 if (fieldFromInstruction(Insn, 6, 1))
4299 return MCDisassembler::Fail; // UNDEFINED
4300 index = fieldFromInstruction(Insn, 7, 1);
4302 switch (fieldFromInstruction(Insn, 4, 2)) {
4308 return MCDisassembler::Fail;
4313 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4314 return MCDisassembler::Fail;
4315 if (Rm != 0xF) { // Writeback
4316 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4317 return MCDisassembler::Fail;
4319 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4320 return MCDisassembler::Fail;
4321 Inst.addOperand(MCOperand::CreateImm(align));
4324 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4325 return MCDisassembler::Fail;
4327 Inst.addOperand(MCOperand::CreateReg(0));
4330 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4331 return MCDisassembler::Fail;
4332 Inst.addOperand(MCOperand::CreateImm(index));
4337 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
4338 uint64_t Address, const void *Decoder) {
4339 DecodeStatus S = MCDisassembler::Success;
4341 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4342 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4343 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4344 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4345 unsigned size = fieldFromInstruction(Insn, 10, 2);
4351 return MCDisassembler::Fail;
4353 if (fieldFromInstruction(Insn, 4, 1))
4354 return MCDisassembler::Fail; // UNDEFINED
4355 index = fieldFromInstruction(Insn, 5, 3);
4358 if (fieldFromInstruction(Insn, 5, 1))
4359 return MCDisassembler::Fail; // UNDEFINED
4360 index = fieldFromInstruction(Insn, 6, 2);
4361 if (fieldFromInstruction(Insn, 4, 1))
4365 if (fieldFromInstruction(Insn, 6, 1))
4366 return MCDisassembler::Fail; // UNDEFINED
4367 index = fieldFromInstruction(Insn, 7, 1);
4369 switch (fieldFromInstruction(Insn, 4, 2)) {
4375 return MCDisassembler::Fail;
4380 if (Rm != 0xF) { // Writeback
4381 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4382 return MCDisassembler::Fail;
4384 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4385 return MCDisassembler::Fail;
4386 Inst.addOperand(MCOperand::CreateImm(align));
4389 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4390 return MCDisassembler::Fail;
4392 Inst.addOperand(MCOperand::CreateReg(0));
4395 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4396 return MCDisassembler::Fail;
4397 Inst.addOperand(MCOperand::CreateImm(index));
4403 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
4404 uint64_t Address, const void *Decoder) {
4405 DecodeStatus S = MCDisassembler::Success;
4407 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4408 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4409 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4410 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4411 unsigned size = fieldFromInstruction(Insn, 10, 2);
4418 return MCDisassembler::Fail;
4420 index = fieldFromInstruction(Insn, 5, 3);
4421 if (fieldFromInstruction(Insn, 4, 1))
4425 index = fieldFromInstruction(Insn, 6, 2);
4426 if (fieldFromInstruction(Insn, 4, 1))
4428 if (fieldFromInstruction(Insn, 5, 1))
4432 if (fieldFromInstruction(Insn, 5, 1))
4433 return MCDisassembler::Fail; // UNDEFINED
4434 index = fieldFromInstruction(Insn, 7, 1);
4435 if (fieldFromInstruction(Insn, 4, 1) != 0)
4437 if (fieldFromInstruction(Insn, 6, 1))
4442 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4443 return MCDisassembler::Fail;
4444 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4445 return MCDisassembler::Fail;
4446 if (Rm != 0xF) { // Writeback
4447 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4448 return MCDisassembler::Fail;
4450 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4451 return MCDisassembler::Fail;
4452 Inst.addOperand(MCOperand::CreateImm(align));
4455 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4456 return MCDisassembler::Fail;
4458 Inst.addOperand(MCOperand::CreateReg(0));
4461 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4462 return MCDisassembler::Fail;
4463 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4464 return MCDisassembler::Fail;
4465 Inst.addOperand(MCOperand::CreateImm(index));
4470 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
4471 uint64_t Address, const void *Decoder) {
4472 DecodeStatus S = MCDisassembler::Success;
4474 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4475 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4476 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4477 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4478 unsigned size = fieldFromInstruction(Insn, 10, 2);
4485 return MCDisassembler::Fail;
4487 index = fieldFromInstruction(Insn, 5, 3);
4488 if (fieldFromInstruction(Insn, 4, 1))
4492 index = fieldFromInstruction(Insn, 6, 2);
4493 if (fieldFromInstruction(Insn, 4, 1))
4495 if (fieldFromInstruction(Insn, 5, 1))
4499 if (fieldFromInstruction(Insn, 5, 1))
4500 return MCDisassembler::Fail; // UNDEFINED
4501 index = fieldFromInstruction(Insn, 7, 1);
4502 if (fieldFromInstruction(Insn, 4, 1) != 0)
4504 if (fieldFromInstruction(Insn, 6, 1))
4509 if (Rm != 0xF) { // Writeback
4510 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4511 return MCDisassembler::Fail;
4513 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4514 return MCDisassembler::Fail;
4515 Inst.addOperand(MCOperand::CreateImm(align));
4518 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4519 return MCDisassembler::Fail;
4521 Inst.addOperand(MCOperand::CreateReg(0));
4524 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4525 return MCDisassembler::Fail;
4526 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4527 return MCDisassembler::Fail;
4528 Inst.addOperand(MCOperand::CreateImm(index));
4534 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
4535 uint64_t Address, const void *Decoder) {
4536 DecodeStatus S = MCDisassembler::Success;
4538 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4539 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4540 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4541 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4542 unsigned size = fieldFromInstruction(Insn, 10, 2);
4549 return MCDisassembler::Fail;
4551 if (fieldFromInstruction(Insn, 4, 1))
4552 return MCDisassembler::Fail; // UNDEFINED
4553 index = fieldFromInstruction(Insn, 5, 3);
4556 if (fieldFromInstruction(Insn, 4, 1))
4557 return MCDisassembler::Fail; // UNDEFINED
4558 index = fieldFromInstruction(Insn, 6, 2);
4559 if (fieldFromInstruction(Insn, 5, 1))
4563 if (fieldFromInstruction(Insn, 4, 2))
4564 return MCDisassembler::Fail; // UNDEFINED
4565 index = fieldFromInstruction(Insn, 7, 1);
4566 if (fieldFromInstruction(Insn, 6, 1))
4571 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4572 return MCDisassembler::Fail;
4573 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4574 return MCDisassembler::Fail;
4575 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4576 return MCDisassembler::Fail;
4578 if (Rm != 0xF) { // Writeback
4579 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4580 return MCDisassembler::Fail;
4582 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4583 return MCDisassembler::Fail;
4584 Inst.addOperand(MCOperand::CreateImm(align));
4587 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4588 return MCDisassembler::Fail;
4590 Inst.addOperand(MCOperand::CreateReg(0));
4593 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4594 return MCDisassembler::Fail;
4595 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4596 return MCDisassembler::Fail;
4597 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4598 return MCDisassembler::Fail;
4599 Inst.addOperand(MCOperand::CreateImm(index));
4604 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
4605 uint64_t Address, const void *Decoder) {
4606 DecodeStatus S = MCDisassembler::Success;
4608 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4609 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4610 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4611 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4612 unsigned size = fieldFromInstruction(Insn, 10, 2);
4619 return MCDisassembler::Fail;
4621 if (fieldFromInstruction(Insn, 4, 1))
4622 return MCDisassembler::Fail; // UNDEFINED
4623 index = fieldFromInstruction(Insn, 5, 3);
4626 if (fieldFromInstruction(Insn, 4, 1))
4627 return MCDisassembler::Fail; // UNDEFINED
4628 index = fieldFromInstruction(Insn, 6, 2);
4629 if (fieldFromInstruction(Insn, 5, 1))
4633 if (fieldFromInstruction(Insn, 4, 2))
4634 return MCDisassembler::Fail; // UNDEFINED
4635 index = fieldFromInstruction(Insn, 7, 1);
4636 if (fieldFromInstruction(Insn, 6, 1))
4641 if (Rm != 0xF) { // Writeback
4642 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4643 return MCDisassembler::Fail;
4645 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4646 return MCDisassembler::Fail;
4647 Inst.addOperand(MCOperand::CreateImm(align));
4650 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4651 return MCDisassembler::Fail;
4653 Inst.addOperand(MCOperand::CreateReg(0));
4656 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4657 return MCDisassembler::Fail;
4658 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4659 return MCDisassembler::Fail;
4660 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4661 return MCDisassembler::Fail;
4662 Inst.addOperand(MCOperand::CreateImm(index));
4668 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
4669 uint64_t Address, const void *Decoder) {
4670 DecodeStatus S = MCDisassembler::Success;
4672 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4673 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4674 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4675 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4676 unsigned size = fieldFromInstruction(Insn, 10, 2);
4683 return MCDisassembler::Fail;
4685 if (fieldFromInstruction(Insn, 4, 1))
4687 index = fieldFromInstruction(Insn, 5, 3);
4690 if (fieldFromInstruction(Insn, 4, 1))
4692 index = fieldFromInstruction(Insn, 6, 2);
4693 if (fieldFromInstruction(Insn, 5, 1))
4697 switch (fieldFromInstruction(Insn, 4, 2)) {
4701 return MCDisassembler::Fail;
4703 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4706 index = fieldFromInstruction(Insn, 7, 1);
4707 if (fieldFromInstruction(Insn, 6, 1))
4712 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4713 return MCDisassembler::Fail;
4714 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4715 return MCDisassembler::Fail;
4716 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4717 return MCDisassembler::Fail;
4718 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4719 return MCDisassembler::Fail;
4721 if (Rm != 0xF) { // Writeback
4722 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4723 return MCDisassembler::Fail;
4725 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4726 return MCDisassembler::Fail;
4727 Inst.addOperand(MCOperand::CreateImm(align));
4730 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4731 return MCDisassembler::Fail;
4733 Inst.addOperand(MCOperand::CreateReg(0));
4736 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4737 return MCDisassembler::Fail;
4738 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4739 return MCDisassembler::Fail;
4740 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4741 return MCDisassembler::Fail;
4742 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4743 return MCDisassembler::Fail;
4744 Inst.addOperand(MCOperand::CreateImm(index));
4749 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
4750 uint64_t Address, const void *Decoder) {
4751 DecodeStatus S = MCDisassembler::Success;
4753 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4754 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4755 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4756 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4757 unsigned size = fieldFromInstruction(Insn, 10, 2);
4764 return MCDisassembler::Fail;
4766 if (fieldFromInstruction(Insn, 4, 1))
4768 index = fieldFromInstruction(Insn, 5, 3);
4771 if (fieldFromInstruction(Insn, 4, 1))
4773 index = fieldFromInstruction(Insn, 6, 2);
4774 if (fieldFromInstruction(Insn, 5, 1))
4778 switch (fieldFromInstruction(Insn, 4, 2)) {
4782 return MCDisassembler::Fail;
4784 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4787 index = fieldFromInstruction(Insn, 7, 1);
4788 if (fieldFromInstruction(Insn, 6, 1))
4793 if (Rm != 0xF) { // Writeback
4794 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4795 return MCDisassembler::Fail;
4797 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4798 return MCDisassembler::Fail;
4799 Inst.addOperand(MCOperand::CreateImm(align));
4802 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4803 return MCDisassembler::Fail;
4805 Inst.addOperand(MCOperand::CreateReg(0));
4808 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4809 return MCDisassembler::Fail;
4810 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4811 return MCDisassembler::Fail;
4812 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4813 return MCDisassembler::Fail;
4814 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4815 return MCDisassembler::Fail;
4816 Inst.addOperand(MCOperand::CreateImm(index));
4821 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
4822 uint64_t Address, const void *Decoder) {
4823 DecodeStatus S = MCDisassembler::Success;
4824 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4825 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4826 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4827 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4828 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4830 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4831 S = MCDisassembler::SoftFail;
4833 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4834 return MCDisassembler::Fail;
4835 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4836 return MCDisassembler::Fail;
4837 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4838 return MCDisassembler::Fail;
4839 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4840 return MCDisassembler::Fail;
4841 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4842 return MCDisassembler::Fail;
4847 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
4848 uint64_t Address, const void *Decoder) {
4849 DecodeStatus S = MCDisassembler::Success;
4850 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4851 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4852 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4853 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4854 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4856 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4857 S = MCDisassembler::SoftFail;
4859 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4860 return MCDisassembler::Fail;
4861 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4862 return MCDisassembler::Fail;
4863 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4864 return MCDisassembler::Fail;
4865 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4866 return MCDisassembler::Fail;
4867 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4868 return MCDisassembler::Fail;
4873 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Insn,
4874 uint64_t Address, const void *Decoder) {
4875 DecodeStatus S = MCDisassembler::Success;
4876 unsigned pred = fieldFromInstruction(Insn, 4, 4);
4877 unsigned mask = fieldFromInstruction(Insn, 0, 4);
4881 S = MCDisassembler::SoftFail;
4885 return MCDisassembler::Fail;
4887 Inst.addOperand(MCOperand::CreateImm(pred));
4888 Inst.addOperand(MCOperand::CreateImm(mask));
4893 DecodeT2LDRDPreInstruction(MCInst &Inst, unsigned Insn,
4894 uint64_t Address, const void *Decoder) {
4895 DecodeStatus S = MCDisassembler::Success;
4897 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4898 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
4899 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4900 unsigned addr = fieldFromInstruction(Insn, 0, 8);
4901 unsigned W = fieldFromInstruction(Insn, 21, 1);
4902 unsigned U = fieldFromInstruction(Insn, 23, 1);
4903 unsigned P = fieldFromInstruction(Insn, 24, 1);
4904 bool writeback = (W == 1) | (P == 0);
4906 addr |= (U << 8) | (Rn << 9);
4908 if (writeback && (Rn == Rt || Rn == Rt2))
4909 Check(S, MCDisassembler::SoftFail);
4911 Check(S, MCDisassembler::SoftFail);
4914 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4915 return MCDisassembler::Fail;
4917 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4918 return MCDisassembler::Fail;
4919 // Writeback operand
4920 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4921 return MCDisassembler::Fail;
4923 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4924 return MCDisassembler::Fail;
4930 DecodeT2STRDPreInstruction(MCInst &Inst, unsigned Insn,
4931 uint64_t Address, const void *Decoder) {
4932 DecodeStatus S = MCDisassembler::Success;
4934 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4935 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
4936 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4937 unsigned addr = fieldFromInstruction(Insn, 0, 8);
4938 unsigned W = fieldFromInstruction(Insn, 21, 1);
4939 unsigned U = fieldFromInstruction(Insn, 23, 1);
4940 unsigned P = fieldFromInstruction(Insn, 24, 1);
4941 bool writeback = (W == 1) | (P == 0);
4943 addr |= (U << 8) | (Rn << 9);
4945 if (writeback && (Rn == Rt || Rn == Rt2))
4946 Check(S, MCDisassembler::SoftFail);
4948 // Writeback operand
4949 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4950 return MCDisassembler::Fail;
4952 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4953 return MCDisassembler::Fail;
4955 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4956 return MCDisassembler::Fail;
4958 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4959 return MCDisassembler::Fail;
4964 static DecodeStatus DecodeT2Adr(MCInst &Inst, uint32_t Insn,
4965 uint64_t Address, const void *Decoder) {
4966 unsigned sign1 = fieldFromInstruction(Insn, 21, 1);
4967 unsigned sign2 = fieldFromInstruction(Insn, 23, 1);
4968 if (sign1 != sign2) return MCDisassembler::Fail;
4970 unsigned Val = fieldFromInstruction(Insn, 0, 8);
4971 Val |= fieldFromInstruction(Insn, 12, 3) << 8;
4972 Val |= fieldFromInstruction(Insn, 26, 1) << 11;
4974 Inst.addOperand(MCOperand::CreateImm(SignExtend32<13>(Val)));
4976 return MCDisassembler::Success;
4979 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, uint32_t Val,
4981 const void *Decoder) {
4982 DecodeStatus S = MCDisassembler::Success;
4984 // Shift of "asr #32" is not allowed in Thumb2 mode.
4985 if (Val == 0x20) S = MCDisassembler::SoftFail;
4986 Inst.addOperand(MCOperand::CreateImm(Val));
4990 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
4991 uint64_t Address, const void *Decoder) {
4992 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4993 unsigned Rt2 = fieldFromInstruction(Insn, 0, 4);
4994 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4995 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4998 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
5000 DecodeStatus S = MCDisassembler::Success;
5002 if (Rt == Rn || Rn == Rt2)
5003 S = MCDisassembler::SoftFail;
5005 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
5006 return MCDisassembler::Fail;
5007 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
5008 return MCDisassembler::Fail;
5009 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
5010 return MCDisassembler::Fail;
5011 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
5012 return MCDisassembler::Fail;
5017 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
5018 uint64_t Address, const void *Decoder) {
5019 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
5020 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
5021 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
5022 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
5023 unsigned imm = fieldFromInstruction(Insn, 16, 6);
5024 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
5025 unsigned op = fieldFromInstruction(Insn, 5, 1);
5027 DecodeStatus S = MCDisassembler::Success;
5029 // VMOVv2f32 is ambiguous with these decodings.
5030 if (!(imm & 0x38) && cmode == 0xF) {
5031 if (op == 1) return MCDisassembler::Fail;
5032 Inst.setOpcode(ARM::VMOVv2f32);
5033 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
5036 if (!(imm & 0x20)) return MCDisassembler::Fail;
5038 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
5039 return MCDisassembler::Fail;
5040 if (!Check(S, DecodeDPRRegisterClass(Inst, Vm, Address, Decoder)))
5041 return MCDisassembler::Fail;
5042 Inst.addOperand(MCOperand::CreateImm(64 - imm));
5047 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
5048 uint64_t Address, const void *Decoder) {
5049 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
5050 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
5051 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
5052 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
5053 unsigned imm = fieldFromInstruction(Insn, 16, 6);
5054 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
5055 unsigned op = fieldFromInstruction(Insn, 5, 1);
5057 DecodeStatus S = MCDisassembler::Success;
5059 // VMOVv4f32 is ambiguous with these decodings.
5060 if (!(imm & 0x38) && cmode == 0xF) {
5061 if (op == 1) return MCDisassembler::Fail;
5062 Inst.setOpcode(ARM::VMOVv4f32);
5063 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
5066 if (!(imm & 0x20)) return MCDisassembler::Fail;
5068 if (!Check(S, DecodeQPRRegisterClass(Inst, Vd, Address, Decoder)))
5069 return MCDisassembler::Fail;
5070 if (!Check(S, DecodeQPRRegisterClass(Inst, Vm, Address, Decoder)))
5071 return MCDisassembler::Fail;
5072 Inst.addOperand(MCOperand::CreateImm(64 - imm));
5077 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
5078 uint64_t Address, const void *Decoder) {
5079 DecodeStatus S = MCDisassembler::Success;
5081 unsigned Rn = fieldFromInstruction(Val, 16, 4);
5082 unsigned Rt = fieldFromInstruction(Val, 12, 4);
5083 unsigned Rm = fieldFromInstruction(Val, 0, 4);
5084 Rm |= (fieldFromInstruction(Val, 23, 1) << 4);
5085 unsigned Cond = fieldFromInstruction(Val, 28, 4);
5087 if (fieldFromInstruction(Val, 8, 4) != 0 || Rn == Rt)
5088 S = MCDisassembler::SoftFail;
5090 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
5091 return MCDisassembler::Fail;
5092 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
5093 return MCDisassembler::Fail;
5094 if (!Check(S, DecodeAddrMode7Operand(Inst, Rn, Address, Decoder)))
5095 return MCDisassembler::Fail;
5096 if (!Check(S, DecodePostIdxReg(Inst, Rm, Address, Decoder)))
5097 return MCDisassembler::Fail;
5098 if (!Check(S, DecodePredicateOperand(Inst, Cond, Address, Decoder)))
5099 return MCDisassembler::Fail;
5104 static DecodeStatus DecodeMRRC2(llvm::MCInst &Inst, unsigned Val,
5105 uint64_t Address, const void *Decoder) {
5107 DecodeStatus S = MCDisassembler::Success;
5109 unsigned CRm = fieldFromInstruction(Val, 0, 4);
5110 unsigned opc1 = fieldFromInstruction(Val, 4, 4);
5111 unsigned cop = fieldFromInstruction(Val, 8, 4);
5112 unsigned Rt = fieldFromInstruction(Val, 12, 4);
5113 unsigned Rt2 = fieldFromInstruction(Val, 16, 4);
5115 if ((cop & ~0x1) == 0xa)
5116 return MCDisassembler::Fail;
5119 S = MCDisassembler::SoftFail;
5121 Inst.addOperand(MCOperand::CreateImm(cop));
5122 Inst.addOperand(MCOperand::CreateImm(opc1));
5123 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
5124 return MCDisassembler::Fail;
5125 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
5126 return MCDisassembler::Fail;
5127 Inst.addOperand(MCOperand::CreateImm(CRm));