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 DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
409 ArrayRef<uint8_t> Bytes,
410 uint64_t Address, raw_ostream &OS,
411 raw_ostream &CS) const {
414 assert(!(STI.getFeatureBits() & ARM::ModeThumb) &&
415 "Asked to disassemble an ARM instruction but Subtarget is in Thumb "
418 // We want to read exactly 4 bytes of data.
419 if (Bytes.size() < 4) {
421 return MCDisassembler::Fail;
424 // Encoded as a small-endian 32-bit word in the stream.
426 (Bytes[3] << 24) | (Bytes[2] << 16) | (Bytes[1] << 8) | (Bytes[0] << 0);
428 // Calling the auto-generated decoder function.
429 DecodeStatus Result =
430 decodeInstruction(DecoderTableARM32, MI, Insn, Address, this, STI);
431 if (Result != MCDisassembler::Fail) {
436 // VFP and NEON instructions, similarly, are shared between ARM
439 Result = decodeInstruction(DecoderTableVFP32, MI, Insn, Address, this, STI);
440 if (Result != MCDisassembler::Fail) {
446 Result = decodeInstruction(DecoderTableVFPV832, MI, Insn, Address, this, STI);
447 if (Result != MCDisassembler::Fail) {
454 decodeInstruction(DecoderTableNEONData32, MI, Insn, Address, this, STI);
455 if (Result != MCDisassembler::Fail) {
457 // Add a fake predicate operand, because we share these instruction
458 // definitions with Thumb2 where these instructions are predicable.
459 if (!DecodePredicateOperand(MI, 0xE, Address, this))
460 return MCDisassembler::Fail;
465 Result = decodeInstruction(DecoderTableNEONLoadStore32, MI, Insn, Address,
467 if (Result != MCDisassembler::Fail) {
469 // Add a fake predicate operand, because we share these instruction
470 // definitions with Thumb2 where these instructions are predicable.
471 if (!DecodePredicateOperand(MI, 0xE, Address, this))
472 return MCDisassembler::Fail;
478 decodeInstruction(DecoderTableNEONDup32, MI, Insn, Address, this, STI);
479 if (Result != MCDisassembler::Fail) {
481 // Add a fake predicate operand, because we share these instruction
482 // definitions with Thumb2 where these instructions are predicable.
483 if (!DecodePredicateOperand(MI, 0xE, Address, this))
484 return MCDisassembler::Fail;
490 decodeInstruction(DecoderTablev8NEON32, MI, Insn, Address, this, STI);
491 if (Result != MCDisassembler::Fail) {
498 decodeInstruction(DecoderTablev8Crypto32, MI, Insn, Address, this, STI);
499 if (Result != MCDisassembler::Fail) {
506 return MCDisassembler::Fail;
510 extern const MCInstrDesc ARMInsts[];
513 /// tryAddingSymbolicOperand - trys to add a symbolic operand in place of the
514 /// immediate Value in the MCInst. The immediate Value has had any PC
515 /// adjustment made by the caller. If the instruction is a branch instruction
516 /// then isBranch is true, else false. If the getOpInfo() function was set as
517 /// part of the setupForSymbolicDisassembly() call then that function is called
518 /// to get any symbolic information at the Address for this instruction. If
519 /// that returns non-zero then the symbolic information it returns is used to
520 /// create an MCExpr and that is added as an operand to the MCInst. If
521 /// getOpInfo() returns zero and isBranch is true then a symbol look up for
522 /// Value is done and if a symbol is found an MCExpr is created with that, else
523 /// an MCExpr with Value is created. This function returns true if it adds an
524 /// operand to the MCInst and false otherwise.
525 static bool tryAddingSymbolicOperand(uint64_t Address, int32_t Value,
526 bool isBranch, uint64_t InstSize,
527 MCInst &MI, const void *Decoder) {
528 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
529 // FIXME: Does it make sense for value to be negative?
530 return Dis->tryAddingSymbolicOperand(MI, (uint32_t)Value, Address, isBranch,
531 /* Offset */ 0, InstSize);
534 /// tryAddingPcLoadReferenceComment - trys to add a comment as to what is being
535 /// referenced by a load instruction with the base register that is the Pc.
536 /// These can often be values in a literal pool near the Address of the
537 /// instruction. The Address of the instruction and its immediate Value are
538 /// used as a possible literal pool entry. The SymbolLookUp call back will
539 /// return the name of a symbol referenced by the literal pool's entry if
540 /// the referenced address is that of a symbol. Or it will return a pointer to
541 /// a literal 'C' string if the referenced address of the literal pool's entry
542 /// is an address into a section with 'C' string literals.
543 static void tryAddingPcLoadReferenceComment(uint64_t Address, int Value,
544 const void *Decoder) {
545 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
546 Dis->tryAddingPcLoadReferenceComment(Value, Address);
549 // Thumb1 instructions don't have explicit S bits. Rather, they
550 // implicitly set CPSR. Since it's not represented in the encoding, the
551 // auto-generated decoder won't inject the CPSR operand. We need to fix
552 // that as a post-pass.
553 static void AddThumb1SBit(MCInst &MI, bool InITBlock) {
554 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
555 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
556 MCInst::iterator I = MI.begin();
557 for (unsigned i = 0; i < NumOps; ++i, ++I) {
558 if (I == MI.end()) break;
559 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) {
560 if (i > 0 && OpInfo[i-1].isPredicate()) continue;
561 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
566 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
569 // Most Thumb instructions don't have explicit predicates in the
570 // encoding, but rather get their predicates from IT context. We need
571 // to fix up the predicate operands using this context information as a
573 MCDisassembler::DecodeStatus
574 ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
575 MCDisassembler::DecodeStatus S = Success;
577 // A few instructions actually have predicates encoded in them. Don't
578 // try to overwrite it if we're seeing one of those.
579 switch (MI.getOpcode()) {
590 // Some instructions (mostly conditional branches) are not
591 // allowed in IT blocks.
592 if (ITBlock.instrInITBlock())
601 // Some instructions (mostly unconditional branches) can
602 // only appears at the end of, or outside of, an IT.
603 if (ITBlock.instrInITBlock() && !ITBlock.instrLastInITBlock())
610 // If we're in an IT block, base the predicate on that. Otherwise,
611 // assume a predicate of AL.
613 CC = ITBlock.getITCC();
616 if (ITBlock.instrInITBlock())
617 ITBlock.advanceITState();
619 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
620 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
621 MCInst::iterator I = MI.begin();
622 for (unsigned i = 0; i < NumOps; ++i, ++I) {
623 if (I == MI.end()) break;
624 if (OpInfo[i].isPredicate()) {
625 I = MI.insert(I, MCOperand::CreateImm(CC));
628 MI.insert(I, MCOperand::CreateReg(0));
630 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
635 I = MI.insert(I, MCOperand::CreateImm(CC));
638 MI.insert(I, MCOperand::CreateReg(0));
640 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
645 // Thumb VFP instructions are a special case. Because we share their
646 // encodings between ARM and Thumb modes, and they are predicable in ARM
647 // mode, the auto-generated decoder will give them an (incorrect)
648 // predicate operand. We need to rewrite these operands based on the IT
649 // context as a post-pass.
650 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
652 CC = ITBlock.getITCC();
653 if (ITBlock.instrInITBlock())
654 ITBlock.advanceITState();
656 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
657 MCInst::iterator I = MI.begin();
658 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
659 for (unsigned i = 0; i < NumOps; ++i, ++I) {
660 if (OpInfo[i].isPredicate() ) {
666 I->setReg(ARM::CPSR);
672 DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
673 ArrayRef<uint8_t> Bytes,
676 raw_ostream &CS) const {
679 assert((STI.getFeatureBits() & ARM::ModeThumb) &&
680 "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!");
682 // We want to read exactly 2 bytes of data.
683 if (Bytes.size() < 2) {
685 return MCDisassembler::Fail;
688 uint16_t Insn16 = (Bytes[1] << 8) | Bytes[0];
689 DecodeStatus Result =
690 decodeInstruction(DecoderTableThumb16, MI, Insn16, Address, this, STI);
691 if (Result != MCDisassembler::Fail) {
693 Check(Result, AddThumbPredicate(MI));
698 Result = decodeInstruction(DecoderTableThumbSBit16, MI, Insn16, Address, this,
702 bool InITBlock = ITBlock.instrInITBlock();
703 Check(Result, AddThumbPredicate(MI));
704 AddThumb1SBit(MI, InITBlock);
710 decodeInstruction(DecoderTableThumb216, MI, Insn16, Address, this, STI);
711 if (Result != MCDisassembler::Fail) {
714 // Nested IT blocks are UNPREDICTABLE. Must be checked before we add
715 // the Thumb predicate.
716 if (MI.getOpcode() == ARM::t2IT && ITBlock.instrInITBlock())
717 Result = MCDisassembler::SoftFail;
719 Check(Result, AddThumbPredicate(MI));
721 // If we find an IT instruction, we need to parse its condition
722 // code and mask operands so that we can apply them correctly
723 // to the subsequent instructions.
724 if (MI.getOpcode() == ARM::t2IT) {
726 unsigned Firstcond = MI.getOperand(0).getImm();
727 unsigned Mask = MI.getOperand(1).getImm();
728 ITBlock.setITState(Firstcond, Mask);
734 // We want to read exactly 4 bytes of data.
735 if (Bytes.size() < 4) {
737 return MCDisassembler::Fail;
741 (Bytes[3] << 8) | (Bytes[2] << 0) | (Bytes[1] << 24) | (Bytes[0] << 16);
744 decodeInstruction(DecoderTableThumb32, MI, Insn32, Address, this, STI);
745 if (Result != MCDisassembler::Fail) {
747 bool InITBlock = ITBlock.instrInITBlock();
748 Check(Result, AddThumbPredicate(MI));
749 AddThumb1SBit(MI, InITBlock);
755 decodeInstruction(DecoderTableThumb232, MI, Insn32, Address, this, STI);
756 if (Result != MCDisassembler::Fail) {
758 Check(Result, AddThumbPredicate(MI));
762 if (fieldFromInstruction(Insn32, 28, 4) == 0xE) {
765 decodeInstruction(DecoderTableVFP32, MI, Insn32, Address, this, STI);
766 if (Result != MCDisassembler::Fail) {
768 UpdateThumbVFPPredicate(MI);
775 decodeInstruction(DecoderTableVFPV832, MI, Insn32, Address, this, STI);
776 if (Result != MCDisassembler::Fail) {
781 if (fieldFromInstruction(Insn32, 28, 4) == 0xE) {
783 Result = decodeInstruction(DecoderTableNEONDup32, MI, Insn32, Address, this,
785 if (Result != MCDisassembler::Fail) {
787 Check(Result, AddThumbPredicate(MI));
792 if (fieldFromInstruction(Insn32, 24, 8) == 0xF9) {
794 uint32_t NEONLdStInsn = Insn32;
795 NEONLdStInsn &= 0xF0FFFFFF;
796 NEONLdStInsn |= 0x04000000;
797 Result = decodeInstruction(DecoderTableNEONLoadStore32, MI, NEONLdStInsn,
799 if (Result != MCDisassembler::Fail) {
801 Check(Result, AddThumbPredicate(MI));
806 if (fieldFromInstruction(Insn32, 24, 4) == 0xF) {
808 uint32_t NEONDataInsn = Insn32;
809 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
810 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
811 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
812 Result = decodeInstruction(DecoderTableNEONData32, MI, NEONDataInsn,
814 if (Result != MCDisassembler::Fail) {
816 Check(Result, AddThumbPredicate(MI));
821 uint32_t NEONCryptoInsn = Insn32;
822 NEONCryptoInsn &= 0xF0FFFFFF; // Clear bits 27-24
823 NEONCryptoInsn |= (NEONCryptoInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
824 NEONCryptoInsn |= 0x12000000; // Set bits 28 and 25
825 Result = decodeInstruction(DecoderTablev8Crypto32, MI, NEONCryptoInsn,
827 if (Result != MCDisassembler::Fail) {
833 uint32_t NEONv8Insn = Insn32;
834 NEONv8Insn &= 0xF3FFFFFF; // Clear bits 27-26
835 Result = decodeInstruction(DecoderTablev8NEON32, MI, NEONv8Insn, Address,
837 if (Result != MCDisassembler::Fail) {
845 return MCDisassembler::Fail;
849 extern "C" void LLVMInitializeARMDisassembler() {
850 TargetRegistry::RegisterMCDisassembler(TheARMLETarget,
851 createARMDisassembler);
852 TargetRegistry::RegisterMCDisassembler(TheARMBETarget,
853 createARMDisassembler);
854 TargetRegistry::RegisterMCDisassembler(TheThumbLETarget,
855 createThumbDisassembler);
856 TargetRegistry::RegisterMCDisassembler(TheThumbBETarget,
857 createThumbDisassembler);
860 static const uint16_t GPRDecoderTable[] = {
861 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
862 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
863 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
864 ARM::R12, ARM::SP, ARM::LR, ARM::PC
867 static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
868 uint64_t Address, const void *Decoder) {
870 return MCDisassembler::Fail;
872 unsigned Register = GPRDecoderTable[RegNo];
873 Inst.addOperand(MCOperand::CreateReg(Register));
874 return MCDisassembler::Success;
878 DecodeGPRnopcRegisterClass(MCInst &Inst, unsigned RegNo,
879 uint64_t Address, const void *Decoder) {
880 DecodeStatus S = MCDisassembler::Success;
883 S = MCDisassembler::SoftFail;
885 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
891 DecodeGPRwithAPSRRegisterClass(MCInst &Inst, unsigned RegNo,
892 uint64_t Address, const void *Decoder) {
893 DecodeStatus S = MCDisassembler::Success;
897 Inst.addOperand(MCOperand::CreateReg(ARM::APSR_NZCV));
898 return MCDisassembler::Success;
901 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
905 static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
906 uint64_t Address, const void *Decoder) {
908 return MCDisassembler::Fail;
909 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
912 static const uint16_t GPRPairDecoderTable[] = {
913 ARM::R0_R1, ARM::R2_R3, ARM::R4_R5, ARM::R6_R7,
914 ARM::R8_R9, ARM::R10_R11, ARM::R12_SP
917 static DecodeStatus DecodeGPRPairRegisterClass(MCInst &Inst, unsigned RegNo,
918 uint64_t Address, const void *Decoder) {
919 DecodeStatus S = MCDisassembler::Success;
922 return MCDisassembler::Fail;
924 if ((RegNo & 1) || RegNo == 0xe)
925 S = MCDisassembler::SoftFail;
927 unsigned RegisterPair = GPRPairDecoderTable[RegNo/2];
928 Inst.addOperand(MCOperand::CreateReg(RegisterPair));
932 static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
933 uint64_t Address, const void *Decoder) {
934 unsigned Register = 0;
955 return MCDisassembler::Fail;
958 Inst.addOperand(MCOperand::CreateReg(Register));
959 return MCDisassembler::Success;
962 static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
963 uint64_t Address, const void *Decoder) {
964 DecodeStatus S = MCDisassembler::Success;
965 if (RegNo == 13 || RegNo == 15)
966 S = MCDisassembler::SoftFail;
967 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
971 static const uint16_t SPRDecoderTable[] = {
972 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
973 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
974 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
975 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
976 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
977 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
978 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
979 ARM::S28, ARM::S29, ARM::S30, ARM::S31
982 static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
983 uint64_t Address, const void *Decoder) {
985 return MCDisassembler::Fail;
987 unsigned Register = SPRDecoderTable[RegNo];
988 Inst.addOperand(MCOperand::CreateReg(Register));
989 return MCDisassembler::Success;
992 static const uint16_t DPRDecoderTable[] = {
993 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
994 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
995 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
996 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
997 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
998 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
999 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
1000 ARM::D28, ARM::D29, ARM::D30, ARM::D31
1003 static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
1004 uint64_t Address, const void *Decoder) {
1005 uint64_t featureBits = ((const MCDisassembler*)Decoder)->getSubtargetInfo()
1007 bool hasD16 = featureBits & ARM::FeatureD16;
1009 if (RegNo > 31 || (hasD16 && RegNo > 15))
1010 return MCDisassembler::Fail;
1012 unsigned Register = DPRDecoderTable[RegNo];
1013 Inst.addOperand(MCOperand::CreateReg(Register));
1014 return MCDisassembler::Success;
1017 static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
1018 uint64_t Address, const void *Decoder) {
1020 return MCDisassembler::Fail;
1021 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
1025 DecodeDPR_VFP2RegisterClass(MCInst &Inst, unsigned RegNo,
1026 uint64_t Address, const void *Decoder) {
1028 return MCDisassembler::Fail;
1029 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
1032 static const uint16_t QPRDecoderTable[] = {
1033 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
1034 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
1035 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
1036 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
1040 static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
1041 uint64_t Address, const void *Decoder) {
1042 if (RegNo > 31 || (RegNo & 1) != 0)
1043 return MCDisassembler::Fail;
1046 unsigned Register = QPRDecoderTable[RegNo];
1047 Inst.addOperand(MCOperand::CreateReg(Register));
1048 return MCDisassembler::Success;
1051 static const uint16_t DPairDecoderTable[] = {
1052 ARM::Q0, ARM::D1_D2, ARM::Q1, ARM::D3_D4, ARM::Q2, ARM::D5_D6,
1053 ARM::Q3, ARM::D7_D8, ARM::Q4, ARM::D9_D10, ARM::Q5, ARM::D11_D12,
1054 ARM::Q6, ARM::D13_D14, ARM::Q7, ARM::D15_D16, ARM::Q8, ARM::D17_D18,
1055 ARM::Q9, ARM::D19_D20, ARM::Q10, ARM::D21_D22, ARM::Q11, ARM::D23_D24,
1056 ARM::Q12, ARM::D25_D26, ARM::Q13, ARM::D27_D28, ARM::Q14, ARM::D29_D30,
1060 static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
1061 uint64_t Address, const void *Decoder) {
1063 return MCDisassembler::Fail;
1065 unsigned Register = DPairDecoderTable[RegNo];
1066 Inst.addOperand(MCOperand::CreateReg(Register));
1067 return MCDisassembler::Success;
1070 static const uint16_t DPairSpacedDecoderTable[] = {
1071 ARM::D0_D2, ARM::D1_D3, ARM::D2_D4, ARM::D3_D5,
1072 ARM::D4_D6, ARM::D5_D7, ARM::D6_D8, ARM::D7_D9,
1073 ARM::D8_D10, ARM::D9_D11, ARM::D10_D12, ARM::D11_D13,
1074 ARM::D12_D14, ARM::D13_D15, ARM::D14_D16, ARM::D15_D17,
1075 ARM::D16_D18, ARM::D17_D19, ARM::D18_D20, ARM::D19_D21,
1076 ARM::D20_D22, ARM::D21_D23, ARM::D22_D24, ARM::D23_D25,
1077 ARM::D24_D26, ARM::D25_D27, ARM::D26_D28, ARM::D27_D29,
1078 ARM::D28_D30, ARM::D29_D31
1081 static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
1084 const void *Decoder) {
1086 return MCDisassembler::Fail;
1088 unsigned Register = DPairSpacedDecoderTable[RegNo];
1089 Inst.addOperand(MCOperand::CreateReg(Register));
1090 return MCDisassembler::Success;
1093 static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
1094 uint64_t Address, const void *Decoder) {
1095 if (Val == 0xF) return MCDisassembler::Fail;
1096 // AL predicate is not allowed on Thumb1 branches.
1097 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
1098 return MCDisassembler::Fail;
1099 Inst.addOperand(MCOperand::CreateImm(Val));
1100 if (Val == ARMCC::AL) {
1101 Inst.addOperand(MCOperand::CreateReg(0));
1103 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1104 return MCDisassembler::Success;
1107 static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
1108 uint64_t Address, const void *Decoder) {
1110 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1112 Inst.addOperand(MCOperand::CreateReg(0));
1113 return MCDisassembler::Success;
1116 static DecodeStatus DecodeSOImmOperand(MCInst &Inst, unsigned Val,
1117 uint64_t Address, const void *Decoder) {
1118 uint32_t imm = Val & 0xFF;
1119 uint32_t rot = (Val & 0xF00) >> 7;
1120 uint32_t rot_imm = (imm >> rot) | (imm << ((32-rot) & 0x1F));
1121 Inst.addOperand(MCOperand::CreateImm(rot_imm));
1122 return MCDisassembler::Success;
1125 static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Val,
1126 uint64_t Address, const void *Decoder) {
1127 DecodeStatus S = MCDisassembler::Success;
1129 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1130 unsigned type = fieldFromInstruction(Val, 5, 2);
1131 unsigned imm = fieldFromInstruction(Val, 7, 5);
1133 // Register-immediate
1134 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1135 return MCDisassembler::Fail;
1137 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1140 Shift = ARM_AM::lsl;
1143 Shift = ARM_AM::lsr;
1146 Shift = ARM_AM::asr;
1149 Shift = ARM_AM::ror;
1153 if (Shift == ARM_AM::ror && imm == 0)
1154 Shift = ARM_AM::rrx;
1156 unsigned Op = Shift | (imm << 3);
1157 Inst.addOperand(MCOperand::CreateImm(Op));
1162 static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Val,
1163 uint64_t Address, const void *Decoder) {
1164 DecodeStatus S = MCDisassembler::Success;
1166 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1167 unsigned type = fieldFromInstruction(Val, 5, 2);
1168 unsigned Rs = fieldFromInstruction(Val, 8, 4);
1170 // Register-register
1171 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1172 return MCDisassembler::Fail;
1173 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)))
1174 return MCDisassembler::Fail;
1176 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1179 Shift = ARM_AM::lsl;
1182 Shift = ARM_AM::lsr;
1185 Shift = ARM_AM::asr;
1188 Shift = ARM_AM::ror;
1192 Inst.addOperand(MCOperand::CreateImm(Shift));
1197 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
1198 uint64_t Address, const void *Decoder) {
1199 DecodeStatus S = MCDisassembler::Success;
1201 bool NeedDisjointWriteback = false;
1202 unsigned WritebackReg = 0;
1203 switch (Inst.getOpcode()) {
1206 case ARM::LDMIA_UPD:
1207 case ARM::LDMDB_UPD:
1208 case ARM::LDMIB_UPD:
1209 case ARM::LDMDA_UPD:
1210 case ARM::t2LDMIA_UPD:
1211 case ARM::t2LDMDB_UPD:
1212 case ARM::t2STMIA_UPD:
1213 case ARM::t2STMDB_UPD:
1214 NeedDisjointWriteback = true;
1215 WritebackReg = Inst.getOperand(0).getReg();
1219 // Empty register lists are not allowed.
1220 if (Val == 0) return MCDisassembler::Fail;
1221 for (unsigned i = 0; i < 16; ++i) {
1222 if (Val & (1 << i)) {
1223 if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder)))
1224 return MCDisassembler::Fail;
1225 // Writeback not allowed if Rn is in the target list.
1226 if (NeedDisjointWriteback && WritebackReg == Inst.end()[-1].getReg())
1227 Check(S, MCDisassembler::SoftFail);
1234 static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
1235 uint64_t Address, const void *Decoder) {
1236 DecodeStatus S = MCDisassembler::Success;
1238 unsigned Vd = fieldFromInstruction(Val, 8, 5);
1239 unsigned regs = fieldFromInstruction(Val, 0, 8);
1241 // In case of unpredictable encoding, tweak the operands.
1242 if (regs == 0 || (Vd + regs) > 32) {
1243 regs = Vd + regs > 32 ? 32 - Vd : regs;
1244 regs = std::max( 1u, regs);
1245 S = MCDisassembler::SoftFail;
1248 if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
1249 return MCDisassembler::Fail;
1250 for (unsigned i = 0; i < (regs - 1); ++i) {
1251 if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1252 return MCDisassembler::Fail;
1258 static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
1259 uint64_t Address, const void *Decoder) {
1260 DecodeStatus S = MCDisassembler::Success;
1262 unsigned Vd = fieldFromInstruction(Val, 8, 5);
1263 unsigned regs = fieldFromInstruction(Val, 1, 7);
1265 // In case of unpredictable encoding, tweak the operands.
1266 if (regs == 0 || regs > 16 || (Vd + regs) > 32) {
1267 regs = Vd + regs > 32 ? 32 - Vd : regs;
1268 regs = std::max( 1u, regs);
1269 regs = std::min(16u, regs);
1270 S = MCDisassembler::SoftFail;
1273 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
1274 return MCDisassembler::Fail;
1275 for (unsigned i = 0; i < (regs - 1); ++i) {
1276 if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1277 return MCDisassembler::Fail;
1283 static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Val,
1284 uint64_t Address, const void *Decoder) {
1285 // This operand encodes a mask of contiguous zeros between a specified MSB
1286 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
1287 // the mask of all bits LSB-and-lower, and then xor them to create
1288 // the mask of that's all ones on [msb, lsb]. Finally we not it to
1289 // create the final mask.
1290 unsigned msb = fieldFromInstruction(Val, 5, 5);
1291 unsigned lsb = fieldFromInstruction(Val, 0, 5);
1293 DecodeStatus S = MCDisassembler::Success;
1295 Check(S, MCDisassembler::SoftFail);
1296 // The check above will cause the warning for the "potentially undefined
1297 // instruction encoding" but we can't build a bad MCOperand value here
1298 // with a lsb > msb or else printing the MCInst will cause a crash.
1302 uint32_t msb_mask = 0xFFFFFFFF;
1303 if (msb != 31) msb_mask = (1U << (msb+1)) - 1;
1304 uint32_t lsb_mask = (1U << lsb) - 1;
1306 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
1310 static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
1311 uint64_t Address, const void *Decoder) {
1312 DecodeStatus S = MCDisassembler::Success;
1314 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1315 unsigned CRd = fieldFromInstruction(Insn, 12, 4);
1316 unsigned coproc = fieldFromInstruction(Insn, 8, 4);
1317 unsigned imm = fieldFromInstruction(Insn, 0, 8);
1318 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1319 unsigned U = fieldFromInstruction(Insn, 23, 1);
1321 switch (Inst.getOpcode()) {
1322 case ARM::LDC_OFFSET:
1325 case ARM::LDC_OPTION:
1326 case ARM::LDCL_OFFSET:
1328 case ARM::LDCL_POST:
1329 case ARM::LDCL_OPTION:
1330 case ARM::STC_OFFSET:
1333 case ARM::STC_OPTION:
1334 case ARM::STCL_OFFSET:
1336 case ARM::STCL_POST:
1337 case ARM::STCL_OPTION:
1338 case ARM::t2LDC_OFFSET:
1339 case ARM::t2LDC_PRE:
1340 case ARM::t2LDC_POST:
1341 case ARM::t2LDC_OPTION:
1342 case ARM::t2LDCL_OFFSET:
1343 case ARM::t2LDCL_PRE:
1344 case ARM::t2LDCL_POST:
1345 case ARM::t2LDCL_OPTION:
1346 case ARM::t2STC_OFFSET:
1347 case ARM::t2STC_PRE:
1348 case ARM::t2STC_POST:
1349 case ARM::t2STC_OPTION:
1350 case ARM::t2STCL_OFFSET:
1351 case ARM::t2STCL_PRE:
1352 case ARM::t2STCL_POST:
1353 case ARM::t2STCL_OPTION:
1354 if (coproc == 0xA || coproc == 0xB)
1355 return MCDisassembler::Fail;
1361 uint64_t featureBits = ((const MCDisassembler*)Decoder)->getSubtargetInfo()
1363 if ((featureBits & ARM::HasV8Ops) && (coproc != 14))
1364 return MCDisassembler::Fail;
1366 Inst.addOperand(MCOperand::CreateImm(coproc));
1367 Inst.addOperand(MCOperand::CreateImm(CRd));
1368 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1369 return MCDisassembler::Fail;
1371 switch (Inst.getOpcode()) {
1372 case ARM::t2LDC2_OFFSET:
1373 case ARM::t2LDC2L_OFFSET:
1374 case ARM::t2LDC2_PRE:
1375 case ARM::t2LDC2L_PRE:
1376 case ARM::t2STC2_OFFSET:
1377 case ARM::t2STC2L_OFFSET:
1378 case ARM::t2STC2_PRE:
1379 case ARM::t2STC2L_PRE:
1380 case ARM::LDC2_OFFSET:
1381 case ARM::LDC2L_OFFSET:
1383 case ARM::LDC2L_PRE:
1384 case ARM::STC2_OFFSET:
1385 case ARM::STC2L_OFFSET:
1387 case ARM::STC2L_PRE:
1388 case ARM::t2LDC_OFFSET:
1389 case ARM::t2LDCL_OFFSET:
1390 case ARM::t2LDC_PRE:
1391 case ARM::t2LDCL_PRE:
1392 case ARM::t2STC_OFFSET:
1393 case ARM::t2STCL_OFFSET:
1394 case ARM::t2STC_PRE:
1395 case ARM::t2STCL_PRE:
1396 case ARM::LDC_OFFSET:
1397 case ARM::LDCL_OFFSET:
1400 case ARM::STC_OFFSET:
1401 case ARM::STCL_OFFSET:
1404 imm = ARM_AM::getAM5Opc(U ? ARM_AM::add : ARM_AM::sub, imm);
1405 Inst.addOperand(MCOperand::CreateImm(imm));
1407 case ARM::t2LDC2_POST:
1408 case ARM::t2LDC2L_POST:
1409 case ARM::t2STC2_POST:
1410 case ARM::t2STC2L_POST:
1411 case ARM::LDC2_POST:
1412 case ARM::LDC2L_POST:
1413 case ARM::STC2_POST:
1414 case ARM::STC2L_POST:
1415 case ARM::t2LDC_POST:
1416 case ARM::t2LDCL_POST:
1417 case ARM::t2STC_POST:
1418 case ARM::t2STCL_POST:
1420 case ARM::LDCL_POST:
1422 case ARM::STCL_POST:
1426 // The 'option' variant doesn't encode 'U' in the immediate since
1427 // the immediate is unsigned [0,255].
1428 Inst.addOperand(MCOperand::CreateImm(imm));
1432 switch (Inst.getOpcode()) {
1433 case ARM::LDC_OFFSET:
1436 case ARM::LDC_OPTION:
1437 case ARM::LDCL_OFFSET:
1439 case ARM::LDCL_POST:
1440 case ARM::LDCL_OPTION:
1441 case ARM::STC_OFFSET:
1444 case ARM::STC_OPTION:
1445 case ARM::STCL_OFFSET:
1447 case ARM::STCL_POST:
1448 case ARM::STCL_OPTION:
1449 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1450 return MCDisassembler::Fail;
1460 DecodeAddrMode2IdxInstruction(MCInst &Inst, unsigned Insn,
1461 uint64_t Address, const void *Decoder) {
1462 DecodeStatus S = MCDisassembler::Success;
1464 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1465 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1466 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1467 unsigned imm = fieldFromInstruction(Insn, 0, 12);
1468 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1469 unsigned reg = fieldFromInstruction(Insn, 25, 1);
1470 unsigned P = fieldFromInstruction(Insn, 24, 1);
1471 unsigned W = fieldFromInstruction(Insn, 21, 1);
1473 // On stores, the writeback operand precedes Rt.
1474 switch (Inst.getOpcode()) {
1475 case ARM::STR_POST_IMM:
1476 case ARM::STR_POST_REG:
1477 case ARM::STRB_POST_IMM:
1478 case ARM::STRB_POST_REG:
1479 case ARM::STRT_POST_REG:
1480 case ARM::STRT_POST_IMM:
1481 case ARM::STRBT_POST_REG:
1482 case ARM::STRBT_POST_IMM:
1483 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1484 return MCDisassembler::Fail;
1490 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1491 return MCDisassembler::Fail;
1493 // On loads, the writeback operand comes after Rt.
1494 switch (Inst.getOpcode()) {
1495 case ARM::LDR_POST_IMM:
1496 case ARM::LDR_POST_REG:
1497 case ARM::LDRB_POST_IMM:
1498 case ARM::LDRB_POST_REG:
1499 case ARM::LDRBT_POST_REG:
1500 case ARM::LDRBT_POST_IMM:
1501 case ARM::LDRT_POST_REG:
1502 case ARM::LDRT_POST_IMM:
1503 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1504 return MCDisassembler::Fail;
1510 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1511 return MCDisassembler::Fail;
1513 ARM_AM::AddrOpc Op = ARM_AM::add;
1514 if (!fieldFromInstruction(Insn, 23, 1))
1517 bool writeback = (P == 0) || (W == 1);
1518 unsigned idx_mode = 0;
1520 idx_mode = ARMII::IndexModePre;
1521 else if (!P && writeback)
1522 idx_mode = ARMII::IndexModePost;
1524 if (writeback && (Rn == 15 || Rn == Rt))
1525 S = MCDisassembler::SoftFail; // UNPREDICTABLE
1528 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1529 return MCDisassembler::Fail;
1530 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1531 switch( fieldFromInstruction(Insn, 5, 2)) {
1545 return MCDisassembler::Fail;
1547 unsigned amt = fieldFromInstruction(Insn, 7, 5);
1548 if (Opc == ARM_AM::ror && amt == 0)
1550 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1552 Inst.addOperand(MCOperand::CreateImm(imm));
1554 Inst.addOperand(MCOperand::CreateReg(0));
1555 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1556 Inst.addOperand(MCOperand::CreateImm(tmp));
1559 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1560 return MCDisassembler::Fail;
1565 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Val,
1566 uint64_t Address, const void *Decoder) {
1567 DecodeStatus S = MCDisassembler::Success;
1569 unsigned Rn = fieldFromInstruction(Val, 13, 4);
1570 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1571 unsigned type = fieldFromInstruction(Val, 5, 2);
1572 unsigned imm = fieldFromInstruction(Val, 7, 5);
1573 unsigned U = fieldFromInstruction(Val, 12, 1);
1575 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1591 if (ShOp == ARM_AM::ror && imm == 0)
1594 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1595 return MCDisassembler::Fail;
1596 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1597 return MCDisassembler::Fail;
1600 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1602 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1603 Inst.addOperand(MCOperand::CreateImm(shift));
1609 DecodeAddrMode3Instruction(MCInst &Inst, unsigned Insn,
1610 uint64_t Address, const void *Decoder) {
1611 DecodeStatus S = MCDisassembler::Success;
1613 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1614 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1615 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1616 unsigned type = fieldFromInstruction(Insn, 22, 1);
1617 unsigned imm = fieldFromInstruction(Insn, 8, 4);
1618 unsigned U = ((~fieldFromInstruction(Insn, 23, 1)) & 1) << 8;
1619 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1620 unsigned W = fieldFromInstruction(Insn, 21, 1);
1621 unsigned P = fieldFromInstruction(Insn, 24, 1);
1622 unsigned Rt2 = Rt + 1;
1624 bool writeback = (W == 1) | (P == 0);
1626 // For {LD,ST}RD, Rt must be even, else undefined.
1627 switch (Inst.getOpcode()) {
1630 case ARM::STRD_POST:
1633 case ARM::LDRD_POST:
1634 if (Rt & 0x1) S = MCDisassembler::SoftFail;
1639 switch (Inst.getOpcode()) {
1642 case ARM::STRD_POST:
1643 if (P == 0 && W == 1)
1644 S = MCDisassembler::SoftFail;
1646 if (writeback && (Rn == 15 || Rn == Rt || Rn == Rt2))
1647 S = MCDisassembler::SoftFail;
1648 if (type && Rm == 15)
1649 S = MCDisassembler::SoftFail;
1651 S = MCDisassembler::SoftFail;
1652 if (!type && fieldFromInstruction(Insn, 8, 4))
1653 S = MCDisassembler::SoftFail;
1657 case ARM::STRH_POST:
1659 S = MCDisassembler::SoftFail;
1660 if (writeback && (Rn == 15 || Rn == Rt))
1661 S = MCDisassembler::SoftFail;
1662 if (!type && Rm == 15)
1663 S = MCDisassembler::SoftFail;
1667 case ARM::LDRD_POST:
1668 if (type && Rn == 15){
1670 S = MCDisassembler::SoftFail;
1673 if (P == 0 && W == 1)
1674 S = MCDisassembler::SoftFail;
1675 if (!type && (Rt2 == 15 || Rm == 15 || Rm == Rt || Rm == Rt2))
1676 S = MCDisassembler::SoftFail;
1677 if (!type && writeback && Rn == 15)
1678 S = MCDisassembler::SoftFail;
1679 if (writeback && (Rn == Rt || Rn == Rt2))
1680 S = MCDisassembler::SoftFail;
1684 case ARM::LDRH_POST:
1685 if (type && Rn == 15){
1687 S = MCDisassembler::SoftFail;
1691 S = MCDisassembler::SoftFail;
1692 if (!type && Rm == 15)
1693 S = MCDisassembler::SoftFail;
1694 if (!type && writeback && (Rn == 15 || Rn == Rt))
1695 S = MCDisassembler::SoftFail;
1698 case ARM::LDRSH_PRE:
1699 case ARM::LDRSH_POST:
1701 case ARM::LDRSB_PRE:
1702 case ARM::LDRSB_POST:
1703 if (type && Rn == 15){
1705 S = MCDisassembler::SoftFail;
1708 if (type && (Rt == 15 || (writeback && Rn == Rt)))
1709 S = MCDisassembler::SoftFail;
1710 if (!type && (Rt == 15 || Rm == 15))
1711 S = MCDisassembler::SoftFail;
1712 if (!type && writeback && (Rn == 15 || Rn == Rt))
1713 S = MCDisassembler::SoftFail;
1719 if (writeback) { // Writeback
1721 U |= ARMII::IndexModePre << 9;
1723 U |= ARMII::IndexModePost << 9;
1725 // On stores, the writeback operand precedes Rt.
1726 switch (Inst.getOpcode()) {
1729 case ARM::STRD_POST:
1732 case ARM::STRH_POST:
1733 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1734 return MCDisassembler::Fail;
1741 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1742 return MCDisassembler::Fail;
1743 switch (Inst.getOpcode()) {
1746 case ARM::STRD_POST:
1749 case ARM::LDRD_POST:
1750 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
1751 return MCDisassembler::Fail;
1758 // On loads, the writeback operand comes after Rt.
1759 switch (Inst.getOpcode()) {
1762 case ARM::LDRD_POST:
1765 case ARM::LDRH_POST:
1767 case ARM::LDRSH_PRE:
1768 case ARM::LDRSH_POST:
1770 case ARM::LDRSB_PRE:
1771 case ARM::LDRSB_POST:
1774 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1775 return MCDisassembler::Fail;
1782 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1783 return MCDisassembler::Fail;
1786 Inst.addOperand(MCOperand::CreateReg(0));
1787 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1789 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1790 return MCDisassembler::Fail;
1791 Inst.addOperand(MCOperand::CreateImm(U));
1794 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1795 return MCDisassembler::Fail;
1800 static DecodeStatus DecodeRFEInstruction(MCInst &Inst, unsigned Insn,
1801 uint64_t Address, const void *Decoder) {
1802 DecodeStatus S = MCDisassembler::Success;
1804 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1805 unsigned mode = fieldFromInstruction(Insn, 23, 2);
1822 Inst.addOperand(MCOperand::CreateImm(mode));
1823 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1824 return MCDisassembler::Fail;
1829 static DecodeStatus DecodeQADDInstruction(MCInst &Inst, unsigned Insn,
1830 uint64_t Address, const void *Decoder) {
1831 DecodeStatus S = MCDisassembler::Success;
1833 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
1834 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1835 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1836 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1839 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
1841 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1842 return MCDisassembler::Fail;
1843 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1844 return MCDisassembler::Fail;
1845 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
1846 return MCDisassembler::Fail;
1847 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1848 return MCDisassembler::Fail;
1852 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst &Inst,
1854 uint64_t Address, const void *Decoder) {
1855 DecodeStatus S = MCDisassembler::Success;
1857 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1858 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1859 unsigned reglist = fieldFromInstruction(Insn, 0, 16);
1862 // Ambiguous with RFE and SRS
1863 switch (Inst.getOpcode()) {
1865 Inst.setOpcode(ARM::RFEDA);
1867 case ARM::LDMDA_UPD:
1868 Inst.setOpcode(ARM::RFEDA_UPD);
1871 Inst.setOpcode(ARM::RFEDB);
1873 case ARM::LDMDB_UPD:
1874 Inst.setOpcode(ARM::RFEDB_UPD);
1877 Inst.setOpcode(ARM::RFEIA);
1879 case ARM::LDMIA_UPD:
1880 Inst.setOpcode(ARM::RFEIA_UPD);
1883 Inst.setOpcode(ARM::RFEIB);
1885 case ARM::LDMIB_UPD:
1886 Inst.setOpcode(ARM::RFEIB_UPD);
1889 Inst.setOpcode(ARM::SRSDA);
1891 case ARM::STMDA_UPD:
1892 Inst.setOpcode(ARM::SRSDA_UPD);
1895 Inst.setOpcode(ARM::SRSDB);
1897 case ARM::STMDB_UPD:
1898 Inst.setOpcode(ARM::SRSDB_UPD);
1901 Inst.setOpcode(ARM::SRSIA);
1903 case ARM::STMIA_UPD:
1904 Inst.setOpcode(ARM::SRSIA_UPD);
1907 Inst.setOpcode(ARM::SRSIB);
1909 case ARM::STMIB_UPD:
1910 Inst.setOpcode(ARM::SRSIB_UPD);
1913 return MCDisassembler::Fail;
1916 // For stores (which become SRS's, the only operand is the mode.
1917 if (fieldFromInstruction(Insn, 20, 1) == 0) {
1918 // Check SRS encoding constraints
1919 if (!(fieldFromInstruction(Insn, 22, 1) == 1 &&
1920 fieldFromInstruction(Insn, 20, 1) == 0))
1921 return MCDisassembler::Fail;
1924 MCOperand::CreateImm(fieldFromInstruction(Insn, 0, 4)));
1928 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1931 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1932 return MCDisassembler::Fail;
1933 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1934 return MCDisassembler::Fail; // Tied
1935 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1936 return MCDisassembler::Fail;
1937 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
1938 return MCDisassembler::Fail;
1943 static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
1944 uint64_t Address, const void *Decoder) {
1945 unsigned imod = fieldFromInstruction(Insn, 18, 2);
1946 unsigned M = fieldFromInstruction(Insn, 17, 1);
1947 unsigned iflags = fieldFromInstruction(Insn, 6, 3);
1948 unsigned mode = fieldFromInstruction(Insn, 0, 5);
1950 DecodeStatus S = MCDisassembler::Success;
1952 // This decoder is called from multiple location that do not check
1953 // the full encoding is valid before they do.
1954 if (fieldFromInstruction(Insn, 5, 1) != 0 ||
1955 fieldFromInstruction(Insn, 16, 1) != 0 ||
1956 fieldFromInstruction(Insn, 20, 8) != 0x10)
1957 return MCDisassembler::Fail;
1959 // imod == '01' --> UNPREDICTABLE
1960 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1961 // return failure here. The '01' imod value is unprintable, so there's
1962 // nothing useful we could do even if we returned UNPREDICTABLE.
1964 if (imod == 1) return MCDisassembler::Fail;
1967 Inst.setOpcode(ARM::CPS3p);
1968 Inst.addOperand(MCOperand::CreateImm(imod));
1969 Inst.addOperand(MCOperand::CreateImm(iflags));
1970 Inst.addOperand(MCOperand::CreateImm(mode));
1971 } else if (imod && !M) {
1972 Inst.setOpcode(ARM::CPS2p);
1973 Inst.addOperand(MCOperand::CreateImm(imod));
1974 Inst.addOperand(MCOperand::CreateImm(iflags));
1975 if (mode) S = MCDisassembler::SoftFail;
1976 } else if (!imod && M) {
1977 Inst.setOpcode(ARM::CPS1p);
1978 Inst.addOperand(MCOperand::CreateImm(mode));
1979 if (iflags) S = MCDisassembler::SoftFail;
1981 // imod == '00' && M == '0' --> UNPREDICTABLE
1982 Inst.setOpcode(ARM::CPS1p);
1983 Inst.addOperand(MCOperand::CreateImm(mode));
1984 S = MCDisassembler::SoftFail;
1990 static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
1991 uint64_t Address, const void *Decoder) {
1992 unsigned imod = fieldFromInstruction(Insn, 9, 2);
1993 unsigned M = fieldFromInstruction(Insn, 8, 1);
1994 unsigned iflags = fieldFromInstruction(Insn, 5, 3);
1995 unsigned mode = fieldFromInstruction(Insn, 0, 5);
1997 DecodeStatus S = MCDisassembler::Success;
1999 // imod == '01' --> UNPREDICTABLE
2000 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
2001 // return failure here. The '01' imod value is unprintable, so there's
2002 // nothing useful we could do even if we returned UNPREDICTABLE.
2004 if (imod == 1) return MCDisassembler::Fail;
2007 Inst.setOpcode(ARM::t2CPS3p);
2008 Inst.addOperand(MCOperand::CreateImm(imod));
2009 Inst.addOperand(MCOperand::CreateImm(iflags));
2010 Inst.addOperand(MCOperand::CreateImm(mode));
2011 } else if (imod && !M) {
2012 Inst.setOpcode(ARM::t2CPS2p);
2013 Inst.addOperand(MCOperand::CreateImm(imod));
2014 Inst.addOperand(MCOperand::CreateImm(iflags));
2015 if (mode) S = MCDisassembler::SoftFail;
2016 } else if (!imod && M) {
2017 Inst.setOpcode(ARM::t2CPS1p);
2018 Inst.addOperand(MCOperand::CreateImm(mode));
2019 if (iflags) S = MCDisassembler::SoftFail;
2021 // imod == '00' && M == '0' --> this is a HINT instruction
2022 int imm = fieldFromInstruction(Insn, 0, 8);
2023 // HINT are defined only for immediate in [0..4]
2024 if(imm > 4) return MCDisassembler::Fail;
2025 Inst.setOpcode(ARM::t2HINT);
2026 Inst.addOperand(MCOperand::CreateImm(imm));
2032 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
2033 uint64_t Address, const void *Decoder) {
2034 DecodeStatus S = MCDisassembler::Success;
2036 unsigned Rd = fieldFromInstruction(Insn, 8, 4);
2039 imm |= (fieldFromInstruction(Insn, 0, 8) << 0);
2040 imm |= (fieldFromInstruction(Insn, 12, 3) << 8);
2041 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
2042 imm |= (fieldFromInstruction(Insn, 26, 1) << 11);
2044 if (Inst.getOpcode() == ARM::t2MOVTi16)
2045 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
2046 return MCDisassembler::Fail;
2047 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
2048 return MCDisassembler::Fail;
2050 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
2051 Inst.addOperand(MCOperand::CreateImm(imm));
2056 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
2057 uint64_t Address, const void *Decoder) {
2058 DecodeStatus S = MCDisassembler::Success;
2060 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2061 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2064 imm |= (fieldFromInstruction(Insn, 0, 12) << 0);
2065 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
2067 if (Inst.getOpcode() == ARM::MOVTi16)
2068 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2069 return MCDisassembler::Fail;
2071 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2072 return MCDisassembler::Fail;
2074 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
2075 Inst.addOperand(MCOperand::CreateImm(imm));
2077 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2078 return MCDisassembler::Fail;
2083 static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
2084 uint64_t Address, const void *Decoder) {
2085 DecodeStatus S = MCDisassembler::Success;
2087 unsigned Rd = fieldFromInstruction(Insn, 16, 4);
2088 unsigned Rn = fieldFromInstruction(Insn, 0, 4);
2089 unsigned Rm = fieldFromInstruction(Insn, 8, 4);
2090 unsigned Ra = fieldFromInstruction(Insn, 12, 4);
2091 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2094 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
2096 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2097 return MCDisassembler::Fail;
2098 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
2099 return MCDisassembler::Fail;
2100 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
2101 return MCDisassembler::Fail;
2102 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
2103 return MCDisassembler::Fail;
2105 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2106 return MCDisassembler::Fail;
2111 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
2112 uint64_t Address, const void *Decoder) {
2113 DecodeStatus S = MCDisassembler::Success;
2115 unsigned add = fieldFromInstruction(Val, 12, 1);
2116 unsigned imm = fieldFromInstruction(Val, 0, 12);
2117 unsigned Rn = fieldFromInstruction(Val, 13, 4);
2119 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2120 return MCDisassembler::Fail;
2122 if (!add) imm *= -1;
2123 if (imm == 0 && !add) imm = INT32_MIN;
2124 Inst.addOperand(MCOperand::CreateImm(imm));
2126 tryAddingPcLoadReferenceComment(Address, Address + imm + 8, Decoder);
2131 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
2132 uint64_t Address, const void *Decoder) {
2133 DecodeStatus S = MCDisassembler::Success;
2135 unsigned Rn = fieldFromInstruction(Val, 9, 4);
2136 unsigned U = fieldFromInstruction(Val, 8, 1);
2137 unsigned imm = fieldFromInstruction(Val, 0, 8);
2139 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2140 return MCDisassembler::Fail;
2143 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
2145 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
2150 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
2151 uint64_t Address, const void *Decoder) {
2152 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
2156 DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
2157 uint64_t Address, const void *Decoder) {
2158 DecodeStatus Status = MCDisassembler::Success;
2160 // Note the J1 and J2 values are from the encoded instruction. So here
2161 // change them to I1 and I2 values via as documented:
2162 // I1 = NOT(J1 EOR S);
2163 // I2 = NOT(J2 EOR S);
2164 // and build the imm32 with one trailing zero as documented:
2165 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
2166 unsigned S = fieldFromInstruction(Insn, 26, 1);
2167 unsigned J1 = fieldFromInstruction(Insn, 13, 1);
2168 unsigned J2 = fieldFromInstruction(Insn, 11, 1);
2169 unsigned I1 = !(J1 ^ S);
2170 unsigned I2 = !(J2 ^ S);
2171 unsigned imm10 = fieldFromInstruction(Insn, 16, 10);
2172 unsigned imm11 = fieldFromInstruction(Insn, 0, 11);
2173 unsigned tmp = (S << 23) | (I1 << 22) | (I2 << 21) | (imm10 << 11) | imm11;
2174 int imm32 = SignExtend32<25>(tmp << 1);
2175 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
2176 true, 4, Inst, Decoder))
2177 Inst.addOperand(MCOperand::CreateImm(imm32));
2183 DecodeBranchImmInstruction(MCInst &Inst, unsigned Insn,
2184 uint64_t Address, const void *Decoder) {
2185 DecodeStatus S = MCDisassembler::Success;
2187 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2188 unsigned imm = fieldFromInstruction(Insn, 0, 24) << 2;
2191 Inst.setOpcode(ARM::BLXi);
2192 imm |= fieldFromInstruction(Insn, 24, 1) << 1;
2193 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2194 true, 4, Inst, Decoder))
2195 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2199 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2200 true, 4, Inst, Decoder))
2201 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2202 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2203 return MCDisassembler::Fail;
2209 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
2210 uint64_t Address, const void *Decoder) {
2211 DecodeStatus S = MCDisassembler::Success;
2213 unsigned Rm = fieldFromInstruction(Val, 0, 4);
2214 unsigned align = fieldFromInstruction(Val, 4, 2);
2216 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2217 return MCDisassembler::Fail;
2219 Inst.addOperand(MCOperand::CreateImm(0));
2221 Inst.addOperand(MCOperand::CreateImm(4 << align));
2226 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Insn,
2227 uint64_t Address, const void *Decoder) {
2228 DecodeStatus S = MCDisassembler::Success;
2230 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2231 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2232 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2233 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2234 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2235 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2237 // First output register
2238 switch (Inst.getOpcode()) {
2239 case ARM::VLD1q16: case ARM::VLD1q32: case ARM::VLD1q64: case ARM::VLD1q8:
2240 case ARM::VLD1q16wb_fixed: case ARM::VLD1q16wb_register:
2241 case ARM::VLD1q32wb_fixed: case ARM::VLD1q32wb_register:
2242 case ARM::VLD1q64wb_fixed: case ARM::VLD1q64wb_register:
2243 case ARM::VLD1q8wb_fixed: case ARM::VLD1q8wb_register:
2244 case ARM::VLD2d16: case ARM::VLD2d32: case ARM::VLD2d8:
2245 case ARM::VLD2d16wb_fixed: case ARM::VLD2d16wb_register:
2246 case ARM::VLD2d32wb_fixed: case ARM::VLD2d32wb_register:
2247 case ARM::VLD2d8wb_fixed: case ARM::VLD2d8wb_register:
2248 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2249 return MCDisassembler::Fail;
2254 case ARM::VLD2b16wb_fixed:
2255 case ARM::VLD2b16wb_register:
2256 case ARM::VLD2b32wb_fixed:
2257 case ARM::VLD2b32wb_register:
2258 case ARM::VLD2b8wb_fixed:
2259 case ARM::VLD2b8wb_register:
2260 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2261 return MCDisassembler::Fail;
2264 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2265 return MCDisassembler::Fail;
2268 // Second output register
2269 switch (Inst.getOpcode()) {
2273 case ARM::VLD3d8_UPD:
2274 case ARM::VLD3d16_UPD:
2275 case ARM::VLD3d32_UPD:
2279 case ARM::VLD4d8_UPD:
2280 case ARM::VLD4d16_UPD:
2281 case ARM::VLD4d32_UPD:
2282 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2283 return MCDisassembler::Fail;
2288 case ARM::VLD3q8_UPD:
2289 case ARM::VLD3q16_UPD:
2290 case ARM::VLD3q32_UPD:
2294 case ARM::VLD4q8_UPD:
2295 case ARM::VLD4q16_UPD:
2296 case ARM::VLD4q32_UPD:
2297 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2298 return MCDisassembler::Fail;
2303 // Third output register
2304 switch(Inst.getOpcode()) {
2308 case ARM::VLD3d8_UPD:
2309 case ARM::VLD3d16_UPD:
2310 case ARM::VLD3d32_UPD:
2314 case ARM::VLD4d8_UPD:
2315 case ARM::VLD4d16_UPD:
2316 case ARM::VLD4d32_UPD:
2317 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2318 return MCDisassembler::Fail;
2323 case ARM::VLD3q8_UPD:
2324 case ARM::VLD3q16_UPD:
2325 case ARM::VLD3q32_UPD:
2329 case ARM::VLD4q8_UPD:
2330 case ARM::VLD4q16_UPD:
2331 case ARM::VLD4q32_UPD:
2332 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2333 return MCDisassembler::Fail;
2339 // Fourth output register
2340 switch (Inst.getOpcode()) {
2344 case ARM::VLD4d8_UPD:
2345 case ARM::VLD4d16_UPD:
2346 case ARM::VLD4d32_UPD:
2347 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2348 return MCDisassembler::Fail;
2353 case ARM::VLD4q8_UPD:
2354 case ARM::VLD4q16_UPD:
2355 case ARM::VLD4q32_UPD:
2356 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2357 return MCDisassembler::Fail;
2363 // Writeback operand
2364 switch (Inst.getOpcode()) {
2365 case ARM::VLD1d8wb_fixed:
2366 case ARM::VLD1d16wb_fixed:
2367 case ARM::VLD1d32wb_fixed:
2368 case ARM::VLD1d64wb_fixed:
2369 case ARM::VLD1d8wb_register:
2370 case ARM::VLD1d16wb_register:
2371 case ARM::VLD1d32wb_register:
2372 case ARM::VLD1d64wb_register:
2373 case ARM::VLD1q8wb_fixed:
2374 case ARM::VLD1q16wb_fixed:
2375 case ARM::VLD1q32wb_fixed:
2376 case ARM::VLD1q64wb_fixed:
2377 case ARM::VLD1q8wb_register:
2378 case ARM::VLD1q16wb_register:
2379 case ARM::VLD1q32wb_register:
2380 case ARM::VLD1q64wb_register:
2381 case ARM::VLD1d8Twb_fixed:
2382 case ARM::VLD1d8Twb_register:
2383 case ARM::VLD1d16Twb_fixed:
2384 case ARM::VLD1d16Twb_register:
2385 case ARM::VLD1d32Twb_fixed:
2386 case ARM::VLD1d32Twb_register:
2387 case ARM::VLD1d64Twb_fixed:
2388 case ARM::VLD1d64Twb_register:
2389 case ARM::VLD1d8Qwb_fixed:
2390 case ARM::VLD1d8Qwb_register:
2391 case ARM::VLD1d16Qwb_fixed:
2392 case ARM::VLD1d16Qwb_register:
2393 case ARM::VLD1d32Qwb_fixed:
2394 case ARM::VLD1d32Qwb_register:
2395 case ARM::VLD1d64Qwb_fixed:
2396 case ARM::VLD1d64Qwb_register:
2397 case ARM::VLD2d8wb_fixed:
2398 case ARM::VLD2d16wb_fixed:
2399 case ARM::VLD2d32wb_fixed:
2400 case ARM::VLD2q8wb_fixed:
2401 case ARM::VLD2q16wb_fixed:
2402 case ARM::VLD2q32wb_fixed:
2403 case ARM::VLD2d8wb_register:
2404 case ARM::VLD2d16wb_register:
2405 case ARM::VLD2d32wb_register:
2406 case ARM::VLD2q8wb_register:
2407 case ARM::VLD2q16wb_register:
2408 case ARM::VLD2q32wb_register:
2409 case ARM::VLD2b8wb_fixed:
2410 case ARM::VLD2b16wb_fixed:
2411 case ARM::VLD2b32wb_fixed:
2412 case ARM::VLD2b8wb_register:
2413 case ARM::VLD2b16wb_register:
2414 case ARM::VLD2b32wb_register:
2415 Inst.addOperand(MCOperand::CreateImm(0));
2417 case ARM::VLD3d8_UPD:
2418 case ARM::VLD3d16_UPD:
2419 case ARM::VLD3d32_UPD:
2420 case ARM::VLD3q8_UPD:
2421 case ARM::VLD3q16_UPD:
2422 case ARM::VLD3q32_UPD:
2423 case ARM::VLD4d8_UPD:
2424 case ARM::VLD4d16_UPD:
2425 case ARM::VLD4d32_UPD:
2426 case ARM::VLD4q8_UPD:
2427 case ARM::VLD4q16_UPD:
2428 case ARM::VLD4q32_UPD:
2429 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2430 return MCDisassembler::Fail;
2436 // AddrMode6 Base (register+alignment)
2437 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2438 return MCDisassembler::Fail;
2440 // AddrMode6 Offset (register)
2441 switch (Inst.getOpcode()) {
2443 // The below have been updated to have explicit am6offset split
2444 // between fixed and register offset. For those instructions not
2445 // yet updated, we need to add an additional reg0 operand for the
2448 // The fixed offset encodes as Rm == 0xd, so we check for that.
2450 Inst.addOperand(MCOperand::CreateReg(0));
2453 // Fall through to handle the register offset variant.
2454 case ARM::VLD1d8wb_fixed:
2455 case ARM::VLD1d16wb_fixed:
2456 case ARM::VLD1d32wb_fixed:
2457 case ARM::VLD1d64wb_fixed:
2458 case ARM::VLD1d8Twb_fixed:
2459 case ARM::VLD1d16Twb_fixed:
2460 case ARM::VLD1d32Twb_fixed:
2461 case ARM::VLD1d64Twb_fixed:
2462 case ARM::VLD1d8Qwb_fixed:
2463 case ARM::VLD1d16Qwb_fixed:
2464 case ARM::VLD1d32Qwb_fixed:
2465 case ARM::VLD1d64Qwb_fixed:
2466 case ARM::VLD1d8wb_register:
2467 case ARM::VLD1d16wb_register:
2468 case ARM::VLD1d32wb_register:
2469 case ARM::VLD1d64wb_register:
2470 case ARM::VLD1q8wb_fixed:
2471 case ARM::VLD1q16wb_fixed:
2472 case ARM::VLD1q32wb_fixed:
2473 case ARM::VLD1q64wb_fixed:
2474 case ARM::VLD1q8wb_register:
2475 case ARM::VLD1q16wb_register:
2476 case ARM::VLD1q32wb_register:
2477 case ARM::VLD1q64wb_register:
2478 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2479 // variant encodes Rm == 0xf. Anything else is a register offset post-
2480 // increment and we need to add the register operand to the instruction.
2481 if (Rm != 0xD && Rm != 0xF &&
2482 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2483 return MCDisassembler::Fail;
2485 case ARM::VLD2d8wb_fixed:
2486 case ARM::VLD2d16wb_fixed:
2487 case ARM::VLD2d32wb_fixed:
2488 case ARM::VLD2b8wb_fixed:
2489 case ARM::VLD2b16wb_fixed:
2490 case ARM::VLD2b32wb_fixed:
2491 case ARM::VLD2q8wb_fixed:
2492 case ARM::VLD2q16wb_fixed:
2493 case ARM::VLD2q32wb_fixed:
2500 static DecodeStatus DecodeVLDST1Instruction(MCInst &Inst, unsigned Insn,
2501 uint64_t Address, const void *Decoder) {
2502 unsigned type = fieldFromInstruction(Insn, 8, 4);
2503 unsigned align = fieldFromInstruction(Insn, 4, 2);
2504 if (type == 6 && (align & 2)) return MCDisassembler::Fail;
2505 if (type == 7 && (align & 2)) return MCDisassembler::Fail;
2506 if (type == 10 && align == 3) return MCDisassembler::Fail;
2508 unsigned load = fieldFromInstruction(Insn, 21, 1);
2509 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
2510 : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
2513 static DecodeStatus DecodeVLDST2Instruction(MCInst &Inst, unsigned Insn,
2514 uint64_t Address, const void *Decoder) {
2515 unsigned size = fieldFromInstruction(Insn, 6, 2);
2516 if (size == 3) return MCDisassembler::Fail;
2518 unsigned type = fieldFromInstruction(Insn, 8, 4);
2519 unsigned align = fieldFromInstruction(Insn, 4, 2);
2520 if (type == 8 && align == 3) return MCDisassembler::Fail;
2521 if (type == 9 && align == 3) return MCDisassembler::Fail;
2523 unsigned load = fieldFromInstruction(Insn, 21, 1);
2524 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
2525 : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
2528 static DecodeStatus DecodeVLDST3Instruction(MCInst &Inst, unsigned Insn,
2529 uint64_t Address, const void *Decoder) {
2530 unsigned size = fieldFromInstruction(Insn, 6, 2);
2531 if (size == 3) return MCDisassembler::Fail;
2533 unsigned align = fieldFromInstruction(Insn, 4, 2);
2534 if (align & 2) return MCDisassembler::Fail;
2536 unsigned load = fieldFromInstruction(Insn, 21, 1);
2537 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
2538 : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
2541 static DecodeStatus DecodeVLDST4Instruction(MCInst &Inst, unsigned Insn,
2542 uint64_t Address, const void *Decoder) {
2543 unsigned size = fieldFromInstruction(Insn, 6, 2);
2544 if (size == 3) return MCDisassembler::Fail;
2546 unsigned load = fieldFromInstruction(Insn, 21, 1);
2547 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
2548 : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
2551 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Insn,
2552 uint64_t Address, const void *Decoder) {
2553 DecodeStatus S = MCDisassembler::Success;
2555 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2556 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2557 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2558 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2559 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2560 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2562 // Writeback Operand
2563 switch (Inst.getOpcode()) {
2564 case ARM::VST1d8wb_fixed:
2565 case ARM::VST1d16wb_fixed:
2566 case ARM::VST1d32wb_fixed:
2567 case ARM::VST1d64wb_fixed:
2568 case ARM::VST1d8wb_register:
2569 case ARM::VST1d16wb_register:
2570 case ARM::VST1d32wb_register:
2571 case ARM::VST1d64wb_register:
2572 case ARM::VST1q8wb_fixed:
2573 case ARM::VST1q16wb_fixed:
2574 case ARM::VST1q32wb_fixed:
2575 case ARM::VST1q64wb_fixed:
2576 case ARM::VST1q8wb_register:
2577 case ARM::VST1q16wb_register:
2578 case ARM::VST1q32wb_register:
2579 case ARM::VST1q64wb_register:
2580 case ARM::VST1d8Twb_fixed:
2581 case ARM::VST1d16Twb_fixed:
2582 case ARM::VST1d32Twb_fixed:
2583 case ARM::VST1d64Twb_fixed:
2584 case ARM::VST1d8Twb_register:
2585 case ARM::VST1d16Twb_register:
2586 case ARM::VST1d32Twb_register:
2587 case ARM::VST1d64Twb_register:
2588 case ARM::VST1d8Qwb_fixed:
2589 case ARM::VST1d16Qwb_fixed:
2590 case ARM::VST1d32Qwb_fixed:
2591 case ARM::VST1d64Qwb_fixed:
2592 case ARM::VST1d8Qwb_register:
2593 case ARM::VST1d16Qwb_register:
2594 case ARM::VST1d32Qwb_register:
2595 case ARM::VST1d64Qwb_register:
2596 case ARM::VST2d8wb_fixed:
2597 case ARM::VST2d16wb_fixed:
2598 case ARM::VST2d32wb_fixed:
2599 case ARM::VST2d8wb_register:
2600 case ARM::VST2d16wb_register:
2601 case ARM::VST2d32wb_register:
2602 case ARM::VST2q8wb_fixed:
2603 case ARM::VST2q16wb_fixed:
2604 case ARM::VST2q32wb_fixed:
2605 case ARM::VST2q8wb_register:
2606 case ARM::VST2q16wb_register:
2607 case ARM::VST2q32wb_register:
2608 case ARM::VST2b8wb_fixed:
2609 case ARM::VST2b16wb_fixed:
2610 case ARM::VST2b32wb_fixed:
2611 case ARM::VST2b8wb_register:
2612 case ARM::VST2b16wb_register:
2613 case ARM::VST2b32wb_register:
2615 return MCDisassembler::Fail;
2616 Inst.addOperand(MCOperand::CreateImm(0));
2618 case ARM::VST3d8_UPD:
2619 case ARM::VST3d16_UPD:
2620 case ARM::VST3d32_UPD:
2621 case ARM::VST3q8_UPD:
2622 case ARM::VST3q16_UPD:
2623 case ARM::VST3q32_UPD:
2624 case ARM::VST4d8_UPD:
2625 case ARM::VST4d16_UPD:
2626 case ARM::VST4d32_UPD:
2627 case ARM::VST4q8_UPD:
2628 case ARM::VST4q16_UPD:
2629 case ARM::VST4q32_UPD:
2630 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2631 return MCDisassembler::Fail;
2637 // AddrMode6 Base (register+alignment)
2638 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2639 return MCDisassembler::Fail;
2641 // AddrMode6 Offset (register)
2642 switch (Inst.getOpcode()) {
2645 Inst.addOperand(MCOperand::CreateReg(0));
2646 else if (Rm != 0xF) {
2647 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2648 return MCDisassembler::Fail;
2651 case ARM::VST1d8wb_fixed:
2652 case ARM::VST1d16wb_fixed:
2653 case ARM::VST1d32wb_fixed:
2654 case ARM::VST1d64wb_fixed:
2655 case ARM::VST1q8wb_fixed:
2656 case ARM::VST1q16wb_fixed:
2657 case ARM::VST1q32wb_fixed:
2658 case ARM::VST1q64wb_fixed:
2659 case ARM::VST1d8Twb_fixed:
2660 case ARM::VST1d16Twb_fixed:
2661 case ARM::VST1d32Twb_fixed:
2662 case ARM::VST1d64Twb_fixed:
2663 case ARM::VST1d8Qwb_fixed:
2664 case ARM::VST1d16Qwb_fixed:
2665 case ARM::VST1d32Qwb_fixed:
2666 case ARM::VST1d64Qwb_fixed:
2667 case ARM::VST2d8wb_fixed:
2668 case ARM::VST2d16wb_fixed:
2669 case ARM::VST2d32wb_fixed:
2670 case ARM::VST2q8wb_fixed:
2671 case ARM::VST2q16wb_fixed:
2672 case ARM::VST2q32wb_fixed:
2673 case ARM::VST2b8wb_fixed:
2674 case ARM::VST2b16wb_fixed:
2675 case ARM::VST2b32wb_fixed:
2680 // First input register
2681 switch (Inst.getOpcode()) {
2686 case ARM::VST1q16wb_fixed:
2687 case ARM::VST1q16wb_register:
2688 case ARM::VST1q32wb_fixed:
2689 case ARM::VST1q32wb_register:
2690 case ARM::VST1q64wb_fixed:
2691 case ARM::VST1q64wb_register:
2692 case ARM::VST1q8wb_fixed:
2693 case ARM::VST1q8wb_register:
2697 case ARM::VST2d16wb_fixed:
2698 case ARM::VST2d16wb_register:
2699 case ARM::VST2d32wb_fixed:
2700 case ARM::VST2d32wb_register:
2701 case ARM::VST2d8wb_fixed:
2702 case ARM::VST2d8wb_register:
2703 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2704 return MCDisassembler::Fail;
2709 case ARM::VST2b16wb_fixed:
2710 case ARM::VST2b16wb_register:
2711 case ARM::VST2b32wb_fixed:
2712 case ARM::VST2b32wb_register:
2713 case ARM::VST2b8wb_fixed:
2714 case ARM::VST2b8wb_register:
2715 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2716 return MCDisassembler::Fail;
2719 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2720 return MCDisassembler::Fail;
2723 // Second input register
2724 switch (Inst.getOpcode()) {
2728 case ARM::VST3d8_UPD:
2729 case ARM::VST3d16_UPD:
2730 case ARM::VST3d32_UPD:
2734 case ARM::VST4d8_UPD:
2735 case ARM::VST4d16_UPD:
2736 case ARM::VST4d32_UPD:
2737 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2738 return MCDisassembler::Fail;
2743 case ARM::VST3q8_UPD:
2744 case ARM::VST3q16_UPD:
2745 case ARM::VST3q32_UPD:
2749 case ARM::VST4q8_UPD:
2750 case ARM::VST4q16_UPD:
2751 case ARM::VST4q32_UPD:
2752 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2753 return MCDisassembler::Fail;
2759 // Third input register
2760 switch (Inst.getOpcode()) {
2764 case ARM::VST3d8_UPD:
2765 case ARM::VST3d16_UPD:
2766 case ARM::VST3d32_UPD:
2770 case ARM::VST4d8_UPD:
2771 case ARM::VST4d16_UPD:
2772 case ARM::VST4d32_UPD:
2773 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2774 return MCDisassembler::Fail;
2779 case ARM::VST3q8_UPD:
2780 case ARM::VST3q16_UPD:
2781 case ARM::VST3q32_UPD:
2785 case ARM::VST4q8_UPD:
2786 case ARM::VST4q16_UPD:
2787 case ARM::VST4q32_UPD:
2788 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2789 return MCDisassembler::Fail;
2795 // Fourth input register
2796 switch (Inst.getOpcode()) {
2800 case ARM::VST4d8_UPD:
2801 case ARM::VST4d16_UPD:
2802 case ARM::VST4d32_UPD:
2803 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2804 return MCDisassembler::Fail;
2809 case ARM::VST4q8_UPD:
2810 case ARM::VST4q16_UPD:
2811 case ARM::VST4q32_UPD:
2812 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2813 return MCDisassembler::Fail;
2822 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Insn,
2823 uint64_t Address, const void *Decoder) {
2824 DecodeStatus S = MCDisassembler::Success;
2826 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2827 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2828 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2829 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2830 unsigned align = fieldFromInstruction(Insn, 4, 1);
2831 unsigned size = fieldFromInstruction(Insn, 6, 2);
2833 if (size == 0 && align == 1)
2834 return MCDisassembler::Fail;
2835 align *= (1 << size);
2837 switch (Inst.getOpcode()) {
2838 case ARM::VLD1DUPq16: case ARM::VLD1DUPq32: case ARM::VLD1DUPq8:
2839 case ARM::VLD1DUPq16wb_fixed: case ARM::VLD1DUPq16wb_register:
2840 case ARM::VLD1DUPq32wb_fixed: case ARM::VLD1DUPq32wb_register:
2841 case ARM::VLD1DUPq8wb_fixed: case ARM::VLD1DUPq8wb_register:
2842 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2843 return MCDisassembler::Fail;
2846 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2847 return MCDisassembler::Fail;
2851 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2852 return MCDisassembler::Fail;
2855 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2856 return MCDisassembler::Fail;
2857 Inst.addOperand(MCOperand::CreateImm(align));
2859 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2860 // variant encodes Rm == 0xf. Anything else is a register offset post-
2861 // increment and we need to add the register operand to the instruction.
2862 if (Rm != 0xD && Rm != 0xF &&
2863 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2864 return MCDisassembler::Fail;
2869 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Insn,
2870 uint64_t Address, const void *Decoder) {
2871 DecodeStatus S = MCDisassembler::Success;
2873 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2874 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2875 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2876 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2877 unsigned align = fieldFromInstruction(Insn, 4, 1);
2878 unsigned size = 1 << fieldFromInstruction(Insn, 6, 2);
2881 switch (Inst.getOpcode()) {
2882 case ARM::VLD2DUPd16: case ARM::VLD2DUPd32: case ARM::VLD2DUPd8:
2883 case ARM::VLD2DUPd16wb_fixed: case ARM::VLD2DUPd16wb_register:
2884 case ARM::VLD2DUPd32wb_fixed: case ARM::VLD2DUPd32wb_register:
2885 case ARM::VLD2DUPd8wb_fixed: case ARM::VLD2DUPd8wb_register:
2886 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2887 return MCDisassembler::Fail;
2889 case ARM::VLD2DUPd16x2: case ARM::VLD2DUPd32x2: case ARM::VLD2DUPd8x2:
2890 case ARM::VLD2DUPd16x2wb_fixed: case ARM::VLD2DUPd16x2wb_register:
2891 case ARM::VLD2DUPd32x2wb_fixed: case ARM::VLD2DUPd32x2wb_register:
2892 case ARM::VLD2DUPd8x2wb_fixed: case ARM::VLD2DUPd8x2wb_register:
2893 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2894 return MCDisassembler::Fail;
2897 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2898 return MCDisassembler::Fail;
2903 Inst.addOperand(MCOperand::CreateImm(0));
2905 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2906 return MCDisassembler::Fail;
2907 Inst.addOperand(MCOperand::CreateImm(align));
2909 if (Rm != 0xD && Rm != 0xF) {
2910 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2911 return MCDisassembler::Fail;
2917 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Insn,
2918 uint64_t Address, const void *Decoder) {
2919 DecodeStatus S = MCDisassembler::Success;
2921 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2922 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2923 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2924 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2925 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
2927 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2928 return MCDisassembler::Fail;
2929 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2930 return MCDisassembler::Fail;
2931 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2932 return MCDisassembler::Fail;
2934 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2935 return MCDisassembler::Fail;
2938 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2939 return MCDisassembler::Fail;
2940 Inst.addOperand(MCOperand::CreateImm(0));
2943 Inst.addOperand(MCOperand::CreateReg(0));
2944 else if (Rm != 0xF) {
2945 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2946 return MCDisassembler::Fail;
2952 static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Insn,
2953 uint64_t Address, const void *Decoder) {
2954 DecodeStatus S = MCDisassembler::Success;
2956 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2957 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2958 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2959 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2960 unsigned size = fieldFromInstruction(Insn, 6, 2);
2961 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
2962 unsigned align = fieldFromInstruction(Insn, 4, 1);
2966 return MCDisassembler::Fail;
2977 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2978 return MCDisassembler::Fail;
2979 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2980 return MCDisassembler::Fail;
2981 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2982 return MCDisassembler::Fail;
2983 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
2984 return MCDisassembler::Fail;
2986 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2987 return MCDisassembler::Fail;
2990 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2991 return MCDisassembler::Fail;
2992 Inst.addOperand(MCOperand::CreateImm(align));
2995 Inst.addOperand(MCOperand::CreateReg(0));
2996 else if (Rm != 0xF) {
2997 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2998 return MCDisassembler::Fail;
3005 DecodeNEONModImmInstruction(MCInst &Inst, unsigned Insn,
3006 uint64_t Address, const void *Decoder) {
3007 DecodeStatus S = MCDisassembler::Success;
3009 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3010 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3011 unsigned imm = fieldFromInstruction(Insn, 0, 4);
3012 imm |= fieldFromInstruction(Insn, 16, 3) << 4;
3013 imm |= fieldFromInstruction(Insn, 24, 1) << 7;
3014 imm |= fieldFromInstruction(Insn, 8, 4) << 8;
3015 imm |= fieldFromInstruction(Insn, 5, 1) << 12;
3016 unsigned Q = fieldFromInstruction(Insn, 6, 1);
3019 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
3020 return MCDisassembler::Fail;
3022 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3023 return MCDisassembler::Fail;
3026 Inst.addOperand(MCOperand::CreateImm(imm));
3028 switch (Inst.getOpcode()) {
3029 case ARM::VORRiv4i16:
3030 case ARM::VORRiv2i32:
3031 case ARM::VBICiv4i16:
3032 case ARM::VBICiv2i32:
3033 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3034 return MCDisassembler::Fail;
3036 case ARM::VORRiv8i16:
3037 case ARM::VORRiv4i32:
3038 case ARM::VBICiv8i16:
3039 case ARM::VBICiv4i32:
3040 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
3041 return MCDisassembler::Fail;
3050 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Insn,
3051 uint64_t Address, const void *Decoder) {
3052 DecodeStatus S = MCDisassembler::Success;
3054 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3055 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3056 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3057 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
3058 unsigned size = fieldFromInstruction(Insn, 18, 2);
3060 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
3061 return MCDisassembler::Fail;
3062 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
3063 return MCDisassembler::Fail;
3064 Inst.addOperand(MCOperand::CreateImm(8 << size));
3069 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
3070 uint64_t Address, const void *Decoder) {
3071 Inst.addOperand(MCOperand::CreateImm(8 - Val));
3072 return MCDisassembler::Success;
3075 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
3076 uint64_t Address, const void *Decoder) {
3077 Inst.addOperand(MCOperand::CreateImm(16 - Val));
3078 return MCDisassembler::Success;
3081 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
3082 uint64_t Address, const void *Decoder) {
3083 Inst.addOperand(MCOperand::CreateImm(32 - Val));
3084 return MCDisassembler::Success;
3087 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
3088 uint64_t Address, const void *Decoder) {
3089 Inst.addOperand(MCOperand::CreateImm(64 - Val));
3090 return MCDisassembler::Success;
3093 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
3094 uint64_t Address, const void *Decoder) {
3095 DecodeStatus S = MCDisassembler::Success;
3097 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3098 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3099 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3100 Rn |= fieldFromInstruction(Insn, 7, 1) << 4;
3101 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3102 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
3103 unsigned op = fieldFromInstruction(Insn, 6, 1);
3105 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3106 return MCDisassembler::Fail;
3108 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3109 return MCDisassembler::Fail; // Writeback
3112 switch (Inst.getOpcode()) {
3115 if (!Check(S, DecodeDPairRegisterClass(Inst, Rn, Address, Decoder)))
3116 return MCDisassembler::Fail;
3119 if (!Check(S, DecodeDPRRegisterClass(Inst, Rn, Address, Decoder)))
3120 return MCDisassembler::Fail;
3123 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
3124 return MCDisassembler::Fail;
3129 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
3130 uint64_t Address, const void *Decoder) {
3131 DecodeStatus S = MCDisassembler::Success;
3133 unsigned dst = fieldFromInstruction(Insn, 8, 3);
3134 unsigned imm = fieldFromInstruction(Insn, 0, 8);
3136 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
3137 return MCDisassembler::Fail;
3139 switch(Inst.getOpcode()) {
3141 return MCDisassembler::Fail;
3143 break; // tADR does not explicitly represent the PC as an operand.
3145 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3149 Inst.addOperand(MCOperand::CreateImm(imm));
3153 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
3154 uint64_t Address, const void *Decoder) {
3155 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<12>(Val<<1) + 4,
3156 true, 2, Inst, Decoder))
3157 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
3158 return MCDisassembler::Success;
3161 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
3162 uint64_t Address, const void *Decoder) {
3163 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<21>(Val) + 4,
3164 true, 4, Inst, Decoder))
3165 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
3166 return MCDisassembler::Success;
3169 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
3170 uint64_t Address, const void *Decoder) {
3171 if (!tryAddingSymbolicOperand(Address, Address + (Val<<1) + 4,
3172 true, 2, Inst, Decoder))
3173 Inst.addOperand(MCOperand::CreateImm(Val << 1));
3174 return MCDisassembler::Success;
3177 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
3178 uint64_t Address, const void *Decoder) {
3179 DecodeStatus S = MCDisassembler::Success;
3181 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3182 unsigned Rm = fieldFromInstruction(Val, 3, 3);
3184 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3185 return MCDisassembler::Fail;
3186 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
3187 return MCDisassembler::Fail;
3192 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
3193 uint64_t Address, const void *Decoder) {
3194 DecodeStatus S = MCDisassembler::Success;
3196 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3197 unsigned imm = fieldFromInstruction(Val, 3, 5);
3199 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3200 return MCDisassembler::Fail;
3201 Inst.addOperand(MCOperand::CreateImm(imm));
3206 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
3207 uint64_t Address, const void *Decoder) {
3208 unsigned imm = Val << 2;
3210 Inst.addOperand(MCOperand::CreateImm(imm));
3211 tryAddingPcLoadReferenceComment(Address, (Address & ~2u) + imm + 4, Decoder);
3213 return MCDisassembler::Success;
3216 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
3217 uint64_t Address, const void *Decoder) {
3218 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3219 Inst.addOperand(MCOperand::CreateImm(Val));
3221 return MCDisassembler::Success;
3224 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
3225 uint64_t Address, const void *Decoder) {
3226 DecodeStatus S = MCDisassembler::Success;
3228 unsigned Rn = fieldFromInstruction(Val, 6, 4);
3229 unsigned Rm = fieldFromInstruction(Val, 2, 4);
3230 unsigned imm = fieldFromInstruction(Val, 0, 2);
3232 // Thumb stores cannot use PC as dest register.
3233 switch (Inst.getOpcode()) {
3238 return MCDisassembler::Fail;
3243 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3244 return MCDisassembler::Fail;
3245 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3246 return MCDisassembler::Fail;
3247 Inst.addOperand(MCOperand::CreateImm(imm));
3252 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Insn,
3253 uint64_t Address, const void *Decoder) {
3254 DecodeStatus S = MCDisassembler::Success;
3256 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3257 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3259 uint64_t featureBits = ((const MCDisassembler*)Decoder)->getSubtargetInfo()
3261 bool hasMP = featureBits & ARM::FeatureMP;
3262 bool hasV7Ops = featureBits & ARM::HasV7Ops;
3265 switch (Inst.getOpcode()) {
3267 Inst.setOpcode(ARM::t2LDRBpci);
3270 Inst.setOpcode(ARM::t2LDRHpci);
3273 Inst.setOpcode(ARM::t2LDRSHpci);
3276 Inst.setOpcode(ARM::t2LDRSBpci);
3279 Inst.setOpcode(ARM::t2LDRpci);
3282 Inst.setOpcode(ARM::t2PLDpci);
3285 Inst.setOpcode(ARM::t2PLIpci);
3288 return MCDisassembler::Fail;
3291 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3295 switch (Inst.getOpcode()) {
3297 return MCDisassembler::Fail;
3299 Inst.setOpcode(ARM::t2PLDWs);
3302 Inst.setOpcode(ARM::t2PLIs);
3308 switch (Inst.getOpcode()) {
3313 return MCDisassembler::Fail;
3316 if (!hasV7Ops || !hasMP)
3317 return MCDisassembler::Fail;
3320 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3321 return MCDisassembler::Fail;
3324 unsigned addrmode = fieldFromInstruction(Insn, 4, 2);
3325 addrmode |= fieldFromInstruction(Insn, 0, 4) << 2;
3326 addrmode |= fieldFromInstruction(Insn, 16, 4) << 6;
3327 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
3328 return MCDisassembler::Fail;
3333 static DecodeStatus DecodeT2LoadImm8(MCInst &Inst, unsigned Insn,
3334 uint64_t Address, const void* Decoder) {
3335 DecodeStatus S = MCDisassembler::Success;
3337 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3338 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3339 unsigned U = fieldFromInstruction(Insn, 9, 1);
3340 unsigned imm = fieldFromInstruction(Insn, 0, 8);
3343 unsigned add = fieldFromInstruction(Insn, 9, 1);
3345 uint64_t featureBits = ((const MCDisassembler*)Decoder)->getSubtargetInfo()
3347 bool hasMP = featureBits & ARM::FeatureMP;
3348 bool hasV7Ops = featureBits & ARM::HasV7Ops;
3351 switch (Inst.getOpcode()) {
3353 Inst.setOpcode(ARM::t2LDRpci);
3356 Inst.setOpcode(ARM::t2LDRBpci);
3358 case ARM::t2LDRSBi8:
3359 Inst.setOpcode(ARM::t2LDRSBpci);
3362 Inst.setOpcode(ARM::t2LDRHpci);
3364 case ARM::t2LDRSHi8:
3365 Inst.setOpcode(ARM::t2LDRSHpci);
3368 Inst.setOpcode(ARM::t2PLDpci);
3371 Inst.setOpcode(ARM::t2PLIpci);
3374 return MCDisassembler::Fail;
3376 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3380 switch (Inst.getOpcode()) {
3381 case ARM::t2LDRSHi8:
3382 return MCDisassembler::Fail;
3385 Inst.setOpcode(ARM::t2PLDWi8);
3387 case ARM::t2LDRSBi8:
3388 Inst.setOpcode(ARM::t2PLIi8);
3395 switch (Inst.getOpcode()) {
3400 return MCDisassembler::Fail;
3403 if (!hasV7Ops || !hasMP)
3404 return MCDisassembler::Fail;
3407 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3408 return MCDisassembler::Fail;
3411 if (!Check(S, DecodeT2AddrModeImm8(Inst, imm, Address, Decoder)))
3412 return MCDisassembler::Fail;
3416 static DecodeStatus DecodeT2LoadImm12(MCInst &Inst, unsigned Insn,
3417 uint64_t Address, const void* Decoder) {
3418 DecodeStatus S = MCDisassembler::Success;
3420 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3421 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3422 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3425 uint64_t featureBits = ((const MCDisassembler*)Decoder)->getSubtargetInfo()
3427 bool hasMP = (featureBits & ARM::FeatureMP);
3428 bool hasV7Ops = (featureBits & ARM::HasV7Ops);
3431 switch (Inst.getOpcode()) {
3433 Inst.setOpcode(ARM::t2LDRpci);
3435 case ARM::t2LDRHi12:
3436 Inst.setOpcode(ARM::t2LDRHpci);
3438 case ARM::t2LDRSHi12:
3439 Inst.setOpcode(ARM::t2LDRSHpci);
3441 case ARM::t2LDRBi12:
3442 Inst.setOpcode(ARM::t2LDRBpci);
3444 case ARM::t2LDRSBi12:
3445 Inst.setOpcode(ARM::t2LDRSBpci);
3448 Inst.setOpcode(ARM::t2PLDpci);
3451 Inst.setOpcode(ARM::t2PLIpci);
3454 return MCDisassembler::Fail;
3456 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3460 switch (Inst.getOpcode()) {
3461 case ARM::t2LDRSHi12:
3462 return MCDisassembler::Fail;
3463 case ARM::t2LDRHi12:
3464 Inst.setOpcode(ARM::t2PLDWi12);
3466 case ARM::t2LDRSBi12:
3467 Inst.setOpcode(ARM::t2PLIi12);
3474 switch (Inst.getOpcode()) {
3479 return MCDisassembler::Fail;
3481 case ARM::t2PLDWi12:
3482 if (!hasV7Ops || !hasMP)
3483 return MCDisassembler::Fail;
3486 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3487 return MCDisassembler::Fail;
3490 if (!Check(S, DecodeT2AddrModeImm12(Inst, imm, Address, Decoder)))
3491 return MCDisassembler::Fail;
3495 static DecodeStatus DecodeT2LoadT(MCInst &Inst, unsigned Insn,
3496 uint64_t Address, const void* Decoder) {
3497 DecodeStatus S = MCDisassembler::Success;
3499 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3500 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3501 unsigned imm = fieldFromInstruction(Insn, 0, 8);
3505 switch (Inst.getOpcode()) {
3507 Inst.setOpcode(ARM::t2LDRpci);
3510 Inst.setOpcode(ARM::t2LDRBpci);
3513 Inst.setOpcode(ARM::t2LDRHpci);
3516 Inst.setOpcode(ARM::t2LDRSBpci);
3519 Inst.setOpcode(ARM::t2LDRSHpci);
3522 return MCDisassembler::Fail;
3524 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3527 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3528 return MCDisassembler::Fail;
3529 if (!Check(S, DecodeT2AddrModeImm8(Inst, imm, Address, Decoder)))
3530 return MCDisassembler::Fail;
3534 static DecodeStatus DecodeT2LoadLabel(MCInst &Inst, unsigned Insn,
3535 uint64_t Address, const void* Decoder) {
3536 DecodeStatus S = MCDisassembler::Success;
3538 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3539 unsigned U = fieldFromInstruction(Insn, 23, 1);
3540 int imm = fieldFromInstruction(Insn, 0, 12);
3542 uint64_t featureBits = ((const MCDisassembler*)Decoder)->getSubtargetInfo()
3544 bool hasV7Ops = (featureBits & ARM::HasV7Ops);
3547 switch (Inst.getOpcode()) {
3548 case ARM::t2LDRBpci:
3549 case ARM::t2LDRHpci:
3550 Inst.setOpcode(ARM::t2PLDpci);
3552 case ARM::t2LDRSBpci:
3553 Inst.setOpcode(ARM::t2PLIpci);
3555 case ARM::t2LDRSHpci:
3556 return MCDisassembler::Fail;
3562 switch(Inst.getOpcode()) {
3567 return MCDisassembler::Fail;
3570 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3571 return MCDisassembler::Fail;
3575 // Special case for #-0.
3581 Inst.addOperand(MCOperand::CreateImm(imm));
3586 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
3587 uint64_t Address, const void *Decoder) {
3589 Inst.addOperand(MCOperand::CreateImm(INT32_MIN));
3591 int imm = Val & 0xFF;
3593 if (!(Val & 0x100)) imm *= -1;
3594 Inst.addOperand(MCOperand::CreateImm(imm * 4));
3597 return MCDisassembler::Success;
3600 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
3601 uint64_t Address, const void *Decoder) {
3602 DecodeStatus S = MCDisassembler::Success;
3604 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3605 unsigned imm = fieldFromInstruction(Val, 0, 9);
3607 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3608 return MCDisassembler::Fail;
3609 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
3610 return MCDisassembler::Fail;
3615 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
3616 uint64_t Address, const void *Decoder) {
3617 DecodeStatus S = MCDisassembler::Success;
3619 unsigned Rn = fieldFromInstruction(Val, 8, 4);
3620 unsigned imm = fieldFromInstruction(Val, 0, 8);
3622 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
3623 return MCDisassembler::Fail;
3625 Inst.addOperand(MCOperand::CreateImm(imm));
3630 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
3631 uint64_t Address, const void *Decoder) {
3632 int imm = Val & 0xFF;
3635 else if (!(Val & 0x100))
3637 Inst.addOperand(MCOperand::CreateImm(imm));
3639 return MCDisassembler::Success;
3643 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
3644 uint64_t Address, const void *Decoder) {
3645 DecodeStatus S = MCDisassembler::Success;
3647 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3648 unsigned imm = fieldFromInstruction(Val, 0, 9);
3650 // Thumb stores cannot use PC as dest register.
3651 switch (Inst.getOpcode()) {
3659 return MCDisassembler::Fail;
3665 // Some instructions always use an additive offset.
3666 switch (Inst.getOpcode()) {
3681 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3682 return MCDisassembler::Fail;
3683 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
3684 return MCDisassembler::Fail;
3689 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Insn,
3690 uint64_t Address, const void *Decoder) {
3691 DecodeStatus S = MCDisassembler::Success;
3693 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3694 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3695 unsigned addr = fieldFromInstruction(Insn, 0, 8);
3696 addr |= fieldFromInstruction(Insn, 9, 1) << 8;
3698 unsigned load = fieldFromInstruction(Insn, 20, 1);
3701 switch (Inst.getOpcode()) {
3702 case ARM::t2LDR_PRE:
3703 case ARM::t2LDR_POST:
3704 Inst.setOpcode(ARM::t2LDRpci);
3706 case ARM::t2LDRB_PRE:
3707 case ARM::t2LDRB_POST:
3708 Inst.setOpcode(ARM::t2LDRBpci);
3710 case ARM::t2LDRH_PRE:
3711 case ARM::t2LDRH_POST:
3712 Inst.setOpcode(ARM::t2LDRHpci);
3714 case ARM::t2LDRSB_PRE:
3715 case ARM::t2LDRSB_POST:
3717 Inst.setOpcode(ARM::t2PLIpci);
3719 Inst.setOpcode(ARM::t2LDRSBpci);
3721 case ARM::t2LDRSH_PRE:
3722 case ARM::t2LDRSH_POST:
3723 Inst.setOpcode(ARM::t2LDRSHpci);
3726 return MCDisassembler::Fail;
3728 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3732 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3733 return MCDisassembler::Fail;
3736 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3737 return MCDisassembler::Fail;
3740 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3741 return MCDisassembler::Fail;
3744 if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
3745 return MCDisassembler::Fail;
3750 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
3751 uint64_t Address, const void *Decoder) {
3752 DecodeStatus S = MCDisassembler::Success;
3754 unsigned Rn = fieldFromInstruction(Val, 13, 4);
3755 unsigned imm = fieldFromInstruction(Val, 0, 12);
3757 // Thumb stores cannot use PC as dest register.
3758 switch (Inst.getOpcode()) {
3760 case ARM::t2STRBi12:
3761 case ARM::t2STRHi12:
3763 return MCDisassembler::Fail;
3768 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3769 return MCDisassembler::Fail;
3770 Inst.addOperand(MCOperand::CreateImm(imm));
3776 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Insn,
3777 uint64_t Address, const void *Decoder) {
3778 unsigned imm = fieldFromInstruction(Insn, 0, 7);
3780 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3781 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3782 Inst.addOperand(MCOperand::CreateImm(imm));
3784 return MCDisassembler::Success;
3787 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
3788 uint64_t Address, const void *Decoder) {
3789 DecodeStatus S = MCDisassembler::Success;
3791 if (Inst.getOpcode() == ARM::tADDrSP) {
3792 unsigned Rdm = fieldFromInstruction(Insn, 0, 3);
3793 Rdm |= fieldFromInstruction(Insn, 7, 1) << 3;
3795 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3796 return MCDisassembler::Fail;
3797 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3798 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3799 return MCDisassembler::Fail;
3800 } else if (Inst.getOpcode() == ARM::tADDspr) {
3801 unsigned Rm = fieldFromInstruction(Insn, 3, 4);
3803 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3804 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3805 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3806 return MCDisassembler::Fail;
3812 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
3813 uint64_t Address, const void *Decoder) {
3814 unsigned imod = fieldFromInstruction(Insn, 4, 1) | 0x2;
3815 unsigned flags = fieldFromInstruction(Insn, 0, 3);
3817 Inst.addOperand(MCOperand::CreateImm(imod));
3818 Inst.addOperand(MCOperand::CreateImm(flags));
3820 return MCDisassembler::Success;
3823 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
3824 uint64_t Address, const void *Decoder) {
3825 DecodeStatus S = MCDisassembler::Success;
3826 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3827 unsigned add = fieldFromInstruction(Insn, 4, 1);
3829 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
3830 return MCDisassembler::Fail;
3831 Inst.addOperand(MCOperand::CreateImm(add));
3836 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Val,
3837 uint64_t Address, const void *Decoder) {
3838 // Val is passed in as S:J1:J2:imm10H:imm10L:'0'
3839 // Note only one trailing zero not two. Also the J1 and J2 values are from
3840 // the encoded instruction. So here change to I1 and I2 values via:
3841 // I1 = NOT(J1 EOR S);
3842 // I2 = NOT(J2 EOR S);
3843 // and build the imm32 with two trailing zeros as documented:
3844 // imm32 = SignExtend(S:I1:I2:imm10H:imm10L:'00', 32);
3845 unsigned S = (Val >> 23) & 1;
3846 unsigned J1 = (Val >> 22) & 1;
3847 unsigned J2 = (Val >> 21) & 1;
3848 unsigned I1 = !(J1 ^ S);
3849 unsigned I2 = !(J2 ^ S);
3850 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
3851 int imm32 = SignExtend32<25>(tmp << 1);
3853 if (!tryAddingSymbolicOperand(Address,
3854 (Address & ~2u) + imm32 + 4,
3855 true, 4, Inst, Decoder))
3856 Inst.addOperand(MCOperand::CreateImm(imm32));
3857 return MCDisassembler::Success;
3860 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Val,
3861 uint64_t Address, const void *Decoder) {
3862 if (Val == 0xA || Val == 0xB)
3863 return MCDisassembler::Fail;
3865 uint64_t featureBits = ((const MCDisassembler*)Decoder)->getSubtargetInfo()
3867 if ((featureBits & ARM::HasV8Ops) && !(Val == 14 || Val == 15))
3868 return MCDisassembler::Fail;
3870 Inst.addOperand(MCOperand::CreateImm(Val));
3871 return MCDisassembler::Success;
3875 DecodeThumbTableBranch(MCInst &Inst, unsigned Insn,
3876 uint64_t Address, const void *Decoder) {
3877 DecodeStatus S = MCDisassembler::Success;
3879 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3880 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3882 if (Rn == ARM::SP) S = MCDisassembler::SoftFail;
3883 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3884 return MCDisassembler::Fail;
3885 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3886 return MCDisassembler::Fail;
3891 DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Insn,
3892 uint64_t Address, const void *Decoder) {
3893 DecodeStatus S = MCDisassembler::Success;
3895 unsigned pred = fieldFromInstruction(Insn, 22, 4);
3896 if (pred == 0xE || pred == 0xF) {
3897 unsigned opc = fieldFromInstruction(Insn, 4, 28);
3900 return MCDisassembler::Fail;
3902 Inst.setOpcode(ARM::t2DSB);
3905 Inst.setOpcode(ARM::t2DMB);
3908 Inst.setOpcode(ARM::t2ISB);
3912 unsigned imm = fieldFromInstruction(Insn, 0, 4);
3913 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
3916 unsigned brtarget = fieldFromInstruction(Insn, 0, 11) << 1;
3917 brtarget |= fieldFromInstruction(Insn, 11, 1) << 19;
3918 brtarget |= fieldFromInstruction(Insn, 13, 1) << 18;
3919 brtarget |= fieldFromInstruction(Insn, 16, 6) << 12;
3920 brtarget |= fieldFromInstruction(Insn, 26, 1) << 20;
3922 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
3923 return MCDisassembler::Fail;
3924 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3925 return MCDisassembler::Fail;
3930 // Decode a shifted immediate operand. These basically consist
3931 // of an 8-bit value, and a 4-bit directive that specifies either
3932 // a splat operation or a rotation.
3933 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
3934 uint64_t Address, const void *Decoder) {
3935 unsigned ctrl = fieldFromInstruction(Val, 10, 2);
3937 unsigned byte = fieldFromInstruction(Val, 8, 2);
3938 unsigned imm = fieldFromInstruction(Val, 0, 8);
3941 Inst.addOperand(MCOperand::CreateImm(imm));
3944 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
3947 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
3950 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
3955 unsigned unrot = fieldFromInstruction(Val, 0, 7) | 0x80;
3956 unsigned rot = fieldFromInstruction(Val, 7, 5);
3957 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
3958 Inst.addOperand(MCOperand::CreateImm(imm));
3961 return MCDisassembler::Success;
3965 DecodeThumbBCCTargetOperand(MCInst &Inst, unsigned Val,
3966 uint64_t Address, const void *Decoder){
3967 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<9>(Val<<1) + 4,
3968 true, 2, Inst, Decoder))
3969 Inst.addOperand(MCOperand::CreateImm(SignExtend32<9>(Val << 1)));
3970 return MCDisassembler::Success;
3973 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
3974 uint64_t Address, const void *Decoder){
3975 // Val is passed in as S:J1:J2:imm10:imm11
3976 // Note no trailing zero after imm11. Also the J1 and J2 values are from
3977 // the encoded instruction. So here change to I1 and I2 values via:
3978 // I1 = NOT(J1 EOR S);
3979 // I2 = NOT(J2 EOR S);
3980 // and build the imm32 with one trailing zero as documented:
3981 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
3982 unsigned S = (Val >> 23) & 1;
3983 unsigned J1 = (Val >> 22) & 1;
3984 unsigned J2 = (Val >> 21) & 1;
3985 unsigned I1 = !(J1 ^ S);
3986 unsigned I2 = !(J2 ^ S);
3987 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
3988 int imm32 = SignExtend32<25>(tmp << 1);
3990 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
3991 true, 4, Inst, Decoder))
3992 Inst.addOperand(MCOperand::CreateImm(imm32));
3993 return MCDisassembler::Success;
3996 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Val,
3997 uint64_t Address, const void *Decoder) {
3999 return MCDisassembler::Fail;
4001 Inst.addOperand(MCOperand::CreateImm(Val));
4002 return MCDisassembler::Success;
4005 static DecodeStatus DecodeInstSyncBarrierOption(MCInst &Inst, unsigned Val,
4006 uint64_t Address, const void *Decoder) {
4008 return MCDisassembler::Fail;
4010 Inst.addOperand(MCOperand::CreateImm(Val));
4011 return MCDisassembler::Success;
4014 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Val,
4015 uint64_t Address, const void *Decoder) {
4016 DecodeStatus S = MCDisassembler::Success;
4017 uint64_t FeatureBits = ((const MCDisassembler*)Decoder)->getSubtargetInfo()
4019 if (FeatureBits & ARM::FeatureMClass) {
4020 unsigned ValLow = Val & 0xff;
4022 // Validate the SYSm value first.
4037 case 18: // basepri_max
4038 case 19: // faultmask
4039 if (!(FeatureBits & ARM::HasV7Ops))
4040 // Values basepri, basepri_max and faultmask are only valid for v7m.
4041 return MCDisassembler::Fail;
4044 return MCDisassembler::Fail;
4047 if (Inst.getOpcode() == ARM::t2MSR_M) {
4048 unsigned Mask = fieldFromInstruction(Val, 10, 2);
4049 if (!(FeatureBits & ARM::HasV7Ops)) {
4050 // The ARMv6-M MSR bits {11-10} can be only 0b10, other values are
4053 S = MCDisassembler::SoftFail;
4056 // The ARMv7-M architecture stores an additional 2-bit mask value in
4057 // MSR bits {11-10}. The mask is used only with apsr, iapsr, eapsr and
4058 // xpsr, it has to be 0b10 in other cases. Bit mask{1} indicates if
4059 // the NZCVQ bits should be moved by the instruction. Bit mask{0}
4060 // indicates the move for the GE{3:0} bits, the mask{0} bit can be set
4061 // only if the processor includes the DSP extension.
4062 if (Mask == 0 || (Mask != 2 && ValLow > 3) ||
4063 (!(FeatureBits & ARM::FeatureDSPThumb2) && (Mask & 1)))
4064 S = MCDisassembler::SoftFail;
4070 return MCDisassembler::Fail;
4072 Inst.addOperand(MCOperand::CreateImm(Val));
4076 static DecodeStatus DecodeBankedReg(MCInst &Inst, unsigned Val,
4077 uint64_t Address, const void *Decoder) {
4079 unsigned R = fieldFromInstruction(Val, 5, 1);
4080 unsigned SysM = fieldFromInstruction(Val, 0, 5);
4082 // The table of encodings for these banked registers comes from B9.2.3 of the
4083 // ARM ARM. There are patterns, but nothing regular enough to make this logic
4084 // neater. So by fiat, these values are UNPREDICTABLE:
4086 if (SysM == 0x7 || SysM == 0xf || SysM == 0x18 || SysM == 0x19 ||
4087 SysM == 0x1a || SysM == 0x1b)
4088 return MCDisassembler::SoftFail;
4090 if (SysM != 0xe && SysM != 0x10 && SysM != 0x12 && SysM != 0x14 &&
4091 SysM != 0x16 && SysM != 0x1c && SysM != 0x1e)
4092 return MCDisassembler::SoftFail;
4095 Inst.addOperand(MCOperand::CreateImm(Val));
4096 return MCDisassembler::Success;
4099 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
4100 uint64_t Address, const void *Decoder) {
4101 DecodeStatus S = MCDisassembler::Success;
4103 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4104 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4105 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4108 S = MCDisassembler::SoftFail;
4110 if (!Check(S, DecodeGPRPairRegisterClass(Inst, Rt, Address, Decoder)))
4111 return MCDisassembler::Fail;
4112 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4113 return MCDisassembler::Fail;
4114 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4115 return MCDisassembler::Fail;
4120 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
4121 uint64_t Address, const void *Decoder){
4122 DecodeStatus S = MCDisassembler::Success;
4124 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4125 unsigned Rt = fieldFromInstruction(Insn, 0, 4);
4126 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4127 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4129 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
4130 return MCDisassembler::Fail;
4132 if (Rn == 0xF || Rd == Rn || Rd == Rt || Rd == Rt+1)
4133 S = MCDisassembler::SoftFail;
4135 if (!Check(S, DecodeGPRPairRegisterClass(Inst, Rt, Address, Decoder)))
4136 return MCDisassembler::Fail;
4137 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4138 return MCDisassembler::Fail;
4139 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4140 return MCDisassembler::Fail;
4145 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
4146 uint64_t Address, const void *Decoder) {
4147 DecodeStatus S = MCDisassembler::Success;
4149 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4150 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4151 unsigned imm = fieldFromInstruction(Insn, 0, 12);
4152 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
4153 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
4154 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4156 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
4158 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
4159 return MCDisassembler::Fail;
4160 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4161 return MCDisassembler::Fail;
4162 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
4163 return MCDisassembler::Fail;
4164 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4165 return MCDisassembler::Fail;
4170 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
4171 uint64_t Address, const void *Decoder) {
4172 DecodeStatus S = MCDisassembler::Success;
4174 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4175 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4176 unsigned imm = fieldFromInstruction(Insn, 0, 12);
4177 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
4178 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
4179 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4180 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4182 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
4183 if (Rm == 0xF) S = MCDisassembler::SoftFail;
4185 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
4186 return MCDisassembler::Fail;
4187 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4188 return MCDisassembler::Fail;
4189 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
4190 return MCDisassembler::Fail;
4191 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4192 return MCDisassembler::Fail;
4198 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
4199 uint64_t Address, const void *Decoder) {
4200 DecodeStatus S = MCDisassembler::Success;
4202 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4203 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4204 unsigned imm = fieldFromInstruction(Insn, 0, 12);
4205 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
4206 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
4207 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4209 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
4211 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4212 return MCDisassembler::Fail;
4213 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
4214 return MCDisassembler::Fail;
4215 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
4216 return MCDisassembler::Fail;
4217 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4218 return MCDisassembler::Fail;
4223 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
4224 uint64_t Address, const void *Decoder) {
4225 DecodeStatus S = MCDisassembler::Success;
4227 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4228 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4229 unsigned imm = fieldFromInstruction(Insn, 0, 12);
4230 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
4231 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
4232 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4234 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
4236 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4237 return MCDisassembler::Fail;
4238 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
4239 return MCDisassembler::Fail;
4240 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
4241 return MCDisassembler::Fail;
4242 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4243 return MCDisassembler::Fail;
4248 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
4249 uint64_t Address, const void *Decoder) {
4250 DecodeStatus S = MCDisassembler::Success;
4252 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4253 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4254 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4255 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4256 unsigned size = fieldFromInstruction(Insn, 10, 2);
4262 return MCDisassembler::Fail;
4264 if (fieldFromInstruction(Insn, 4, 1))
4265 return MCDisassembler::Fail; // UNDEFINED
4266 index = fieldFromInstruction(Insn, 5, 3);
4269 if (fieldFromInstruction(Insn, 5, 1))
4270 return MCDisassembler::Fail; // UNDEFINED
4271 index = fieldFromInstruction(Insn, 6, 2);
4272 if (fieldFromInstruction(Insn, 4, 1))
4276 if (fieldFromInstruction(Insn, 6, 1))
4277 return MCDisassembler::Fail; // UNDEFINED
4278 index = fieldFromInstruction(Insn, 7, 1);
4280 switch (fieldFromInstruction(Insn, 4, 2)) {
4286 return MCDisassembler::Fail;
4291 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4292 return MCDisassembler::Fail;
4293 if (Rm != 0xF) { // Writeback
4294 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4295 return MCDisassembler::Fail;
4297 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4298 return MCDisassembler::Fail;
4299 Inst.addOperand(MCOperand::CreateImm(align));
4302 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4303 return MCDisassembler::Fail;
4305 Inst.addOperand(MCOperand::CreateReg(0));
4308 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4309 return MCDisassembler::Fail;
4310 Inst.addOperand(MCOperand::CreateImm(index));
4315 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
4316 uint64_t Address, const void *Decoder) {
4317 DecodeStatus S = MCDisassembler::Success;
4319 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4320 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4321 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4322 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4323 unsigned size = fieldFromInstruction(Insn, 10, 2);
4329 return MCDisassembler::Fail;
4331 if (fieldFromInstruction(Insn, 4, 1))
4332 return MCDisassembler::Fail; // UNDEFINED
4333 index = fieldFromInstruction(Insn, 5, 3);
4336 if (fieldFromInstruction(Insn, 5, 1))
4337 return MCDisassembler::Fail; // UNDEFINED
4338 index = fieldFromInstruction(Insn, 6, 2);
4339 if (fieldFromInstruction(Insn, 4, 1))
4343 if (fieldFromInstruction(Insn, 6, 1))
4344 return MCDisassembler::Fail; // UNDEFINED
4345 index = fieldFromInstruction(Insn, 7, 1);
4347 switch (fieldFromInstruction(Insn, 4, 2)) {
4353 return MCDisassembler::Fail;
4358 if (Rm != 0xF) { // Writeback
4359 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4360 return MCDisassembler::Fail;
4362 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4363 return MCDisassembler::Fail;
4364 Inst.addOperand(MCOperand::CreateImm(align));
4367 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4368 return MCDisassembler::Fail;
4370 Inst.addOperand(MCOperand::CreateReg(0));
4373 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4374 return MCDisassembler::Fail;
4375 Inst.addOperand(MCOperand::CreateImm(index));
4381 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
4382 uint64_t Address, const void *Decoder) {
4383 DecodeStatus S = MCDisassembler::Success;
4385 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4386 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4387 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4388 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4389 unsigned size = fieldFromInstruction(Insn, 10, 2);
4396 return MCDisassembler::Fail;
4398 index = fieldFromInstruction(Insn, 5, 3);
4399 if (fieldFromInstruction(Insn, 4, 1))
4403 index = fieldFromInstruction(Insn, 6, 2);
4404 if (fieldFromInstruction(Insn, 4, 1))
4406 if (fieldFromInstruction(Insn, 5, 1))
4410 if (fieldFromInstruction(Insn, 5, 1))
4411 return MCDisassembler::Fail; // UNDEFINED
4412 index = fieldFromInstruction(Insn, 7, 1);
4413 if (fieldFromInstruction(Insn, 4, 1) != 0)
4415 if (fieldFromInstruction(Insn, 6, 1))
4420 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4421 return MCDisassembler::Fail;
4422 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4423 return MCDisassembler::Fail;
4424 if (Rm != 0xF) { // Writeback
4425 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4426 return MCDisassembler::Fail;
4428 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4429 return MCDisassembler::Fail;
4430 Inst.addOperand(MCOperand::CreateImm(align));
4433 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4434 return MCDisassembler::Fail;
4436 Inst.addOperand(MCOperand::CreateReg(0));
4439 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4440 return MCDisassembler::Fail;
4441 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4442 return MCDisassembler::Fail;
4443 Inst.addOperand(MCOperand::CreateImm(index));
4448 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
4449 uint64_t Address, const void *Decoder) {
4450 DecodeStatus S = MCDisassembler::Success;
4452 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4453 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4454 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4455 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4456 unsigned size = fieldFromInstruction(Insn, 10, 2);
4463 return MCDisassembler::Fail;
4465 index = fieldFromInstruction(Insn, 5, 3);
4466 if (fieldFromInstruction(Insn, 4, 1))
4470 index = fieldFromInstruction(Insn, 6, 2);
4471 if (fieldFromInstruction(Insn, 4, 1))
4473 if (fieldFromInstruction(Insn, 5, 1))
4477 if (fieldFromInstruction(Insn, 5, 1))
4478 return MCDisassembler::Fail; // UNDEFINED
4479 index = fieldFromInstruction(Insn, 7, 1);
4480 if (fieldFromInstruction(Insn, 4, 1) != 0)
4482 if (fieldFromInstruction(Insn, 6, 1))
4487 if (Rm != 0xF) { // Writeback
4488 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4489 return MCDisassembler::Fail;
4491 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4492 return MCDisassembler::Fail;
4493 Inst.addOperand(MCOperand::CreateImm(align));
4496 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4497 return MCDisassembler::Fail;
4499 Inst.addOperand(MCOperand::CreateReg(0));
4502 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4503 return MCDisassembler::Fail;
4504 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4505 return MCDisassembler::Fail;
4506 Inst.addOperand(MCOperand::CreateImm(index));
4512 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
4513 uint64_t Address, const void *Decoder) {
4514 DecodeStatus S = MCDisassembler::Success;
4516 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4517 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4518 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4519 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4520 unsigned size = fieldFromInstruction(Insn, 10, 2);
4527 return MCDisassembler::Fail;
4529 if (fieldFromInstruction(Insn, 4, 1))
4530 return MCDisassembler::Fail; // UNDEFINED
4531 index = fieldFromInstruction(Insn, 5, 3);
4534 if (fieldFromInstruction(Insn, 4, 1))
4535 return MCDisassembler::Fail; // UNDEFINED
4536 index = fieldFromInstruction(Insn, 6, 2);
4537 if (fieldFromInstruction(Insn, 5, 1))
4541 if (fieldFromInstruction(Insn, 4, 2))
4542 return MCDisassembler::Fail; // UNDEFINED
4543 index = fieldFromInstruction(Insn, 7, 1);
4544 if (fieldFromInstruction(Insn, 6, 1))
4549 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4550 return MCDisassembler::Fail;
4551 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4552 return MCDisassembler::Fail;
4553 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4554 return MCDisassembler::Fail;
4556 if (Rm != 0xF) { // Writeback
4557 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4558 return MCDisassembler::Fail;
4560 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4561 return MCDisassembler::Fail;
4562 Inst.addOperand(MCOperand::CreateImm(align));
4565 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4566 return MCDisassembler::Fail;
4568 Inst.addOperand(MCOperand::CreateReg(0));
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;
4577 Inst.addOperand(MCOperand::CreateImm(index));
4582 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
4583 uint64_t Address, const void *Decoder) {
4584 DecodeStatus S = MCDisassembler::Success;
4586 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4587 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4588 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4589 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4590 unsigned size = fieldFromInstruction(Insn, 10, 2);
4597 return MCDisassembler::Fail;
4599 if (fieldFromInstruction(Insn, 4, 1))
4600 return MCDisassembler::Fail; // UNDEFINED
4601 index = fieldFromInstruction(Insn, 5, 3);
4604 if (fieldFromInstruction(Insn, 4, 1))
4605 return MCDisassembler::Fail; // UNDEFINED
4606 index = fieldFromInstruction(Insn, 6, 2);
4607 if (fieldFromInstruction(Insn, 5, 1))
4611 if (fieldFromInstruction(Insn, 4, 2))
4612 return MCDisassembler::Fail; // UNDEFINED
4613 index = fieldFromInstruction(Insn, 7, 1);
4614 if (fieldFromInstruction(Insn, 6, 1))
4619 if (Rm != 0xF) { // Writeback
4620 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4621 return MCDisassembler::Fail;
4623 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4624 return MCDisassembler::Fail;
4625 Inst.addOperand(MCOperand::CreateImm(align));
4628 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4629 return MCDisassembler::Fail;
4631 Inst.addOperand(MCOperand::CreateReg(0));
4634 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4635 return MCDisassembler::Fail;
4636 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4637 return MCDisassembler::Fail;
4638 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4639 return MCDisassembler::Fail;
4640 Inst.addOperand(MCOperand::CreateImm(index));
4646 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
4647 uint64_t Address, const void *Decoder) {
4648 DecodeStatus S = MCDisassembler::Success;
4650 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4651 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4652 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4653 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4654 unsigned size = fieldFromInstruction(Insn, 10, 2);
4661 return MCDisassembler::Fail;
4663 if (fieldFromInstruction(Insn, 4, 1))
4665 index = fieldFromInstruction(Insn, 5, 3);
4668 if (fieldFromInstruction(Insn, 4, 1))
4670 index = fieldFromInstruction(Insn, 6, 2);
4671 if (fieldFromInstruction(Insn, 5, 1))
4675 switch (fieldFromInstruction(Insn, 4, 2)) {
4679 return MCDisassembler::Fail;
4681 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4684 index = fieldFromInstruction(Insn, 7, 1);
4685 if (fieldFromInstruction(Insn, 6, 1))
4690 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4691 return MCDisassembler::Fail;
4692 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4693 return MCDisassembler::Fail;
4694 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4695 return MCDisassembler::Fail;
4696 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4697 return MCDisassembler::Fail;
4699 if (Rm != 0xF) { // Writeback
4700 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4701 return MCDisassembler::Fail;
4703 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4704 return MCDisassembler::Fail;
4705 Inst.addOperand(MCOperand::CreateImm(align));
4708 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4709 return MCDisassembler::Fail;
4711 Inst.addOperand(MCOperand::CreateReg(0));
4714 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4715 return MCDisassembler::Fail;
4716 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4717 return MCDisassembler::Fail;
4718 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4719 return MCDisassembler::Fail;
4720 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4721 return MCDisassembler::Fail;
4722 Inst.addOperand(MCOperand::CreateImm(index));
4727 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
4728 uint64_t Address, const void *Decoder) {
4729 DecodeStatus S = MCDisassembler::Success;
4731 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4732 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4733 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4734 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4735 unsigned size = fieldFromInstruction(Insn, 10, 2);
4742 return MCDisassembler::Fail;
4744 if (fieldFromInstruction(Insn, 4, 1))
4746 index = fieldFromInstruction(Insn, 5, 3);
4749 if (fieldFromInstruction(Insn, 4, 1))
4751 index = fieldFromInstruction(Insn, 6, 2);
4752 if (fieldFromInstruction(Insn, 5, 1))
4756 switch (fieldFromInstruction(Insn, 4, 2)) {
4760 return MCDisassembler::Fail;
4762 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4765 index = fieldFromInstruction(Insn, 7, 1);
4766 if (fieldFromInstruction(Insn, 6, 1))
4771 if (Rm != 0xF) { // Writeback
4772 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4773 return MCDisassembler::Fail;
4775 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4776 return MCDisassembler::Fail;
4777 Inst.addOperand(MCOperand::CreateImm(align));
4780 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4781 return MCDisassembler::Fail;
4783 Inst.addOperand(MCOperand::CreateReg(0));
4786 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4787 return MCDisassembler::Fail;
4788 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4789 return MCDisassembler::Fail;
4790 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4791 return MCDisassembler::Fail;
4792 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4793 return MCDisassembler::Fail;
4794 Inst.addOperand(MCOperand::CreateImm(index));
4799 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
4800 uint64_t Address, const void *Decoder) {
4801 DecodeStatus S = MCDisassembler::Success;
4802 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4803 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4804 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4805 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4806 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4808 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4809 S = MCDisassembler::SoftFail;
4811 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4812 return MCDisassembler::Fail;
4813 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4814 return MCDisassembler::Fail;
4815 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4816 return MCDisassembler::Fail;
4817 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4818 return MCDisassembler::Fail;
4819 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4820 return MCDisassembler::Fail;
4825 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
4826 uint64_t Address, const void *Decoder) {
4827 DecodeStatus S = MCDisassembler::Success;
4828 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4829 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4830 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4831 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4832 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4834 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4835 S = MCDisassembler::SoftFail;
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, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4842 return MCDisassembler::Fail;
4843 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4844 return MCDisassembler::Fail;
4845 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4846 return MCDisassembler::Fail;
4851 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Insn,
4852 uint64_t Address, const void *Decoder) {
4853 DecodeStatus S = MCDisassembler::Success;
4854 unsigned pred = fieldFromInstruction(Insn, 4, 4);
4855 unsigned mask = fieldFromInstruction(Insn, 0, 4);
4859 S = MCDisassembler::SoftFail;
4863 return MCDisassembler::Fail;
4865 Inst.addOperand(MCOperand::CreateImm(pred));
4866 Inst.addOperand(MCOperand::CreateImm(mask));
4871 DecodeT2LDRDPreInstruction(MCInst &Inst, unsigned Insn,
4872 uint64_t Address, const void *Decoder) {
4873 DecodeStatus S = MCDisassembler::Success;
4875 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4876 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
4877 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4878 unsigned addr = fieldFromInstruction(Insn, 0, 8);
4879 unsigned W = fieldFromInstruction(Insn, 21, 1);
4880 unsigned U = fieldFromInstruction(Insn, 23, 1);
4881 unsigned P = fieldFromInstruction(Insn, 24, 1);
4882 bool writeback = (W == 1) | (P == 0);
4884 addr |= (U << 8) | (Rn << 9);
4886 if (writeback && (Rn == Rt || Rn == Rt2))
4887 Check(S, MCDisassembler::SoftFail);
4889 Check(S, MCDisassembler::SoftFail);
4892 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4893 return MCDisassembler::Fail;
4895 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4896 return MCDisassembler::Fail;
4897 // Writeback operand
4898 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4899 return MCDisassembler::Fail;
4901 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4902 return MCDisassembler::Fail;
4908 DecodeT2STRDPreInstruction(MCInst &Inst, unsigned Insn,
4909 uint64_t Address, const void *Decoder) {
4910 DecodeStatus S = MCDisassembler::Success;
4912 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4913 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
4914 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4915 unsigned addr = fieldFromInstruction(Insn, 0, 8);
4916 unsigned W = fieldFromInstruction(Insn, 21, 1);
4917 unsigned U = fieldFromInstruction(Insn, 23, 1);
4918 unsigned P = fieldFromInstruction(Insn, 24, 1);
4919 bool writeback = (W == 1) | (P == 0);
4921 addr |= (U << 8) | (Rn << 9);
4923 if (writeback && (Rn == Rt || Rn == Rt2))
4924 Check(S, MCDisassembler::SoftFail);
4926 // Writeback operand
4927 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4928 return MCDisassembler::Fail;
4930 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4931 return MCDisassembler::Fail;
4933 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4934 return MCDisassembler::Fail;
4936 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4937 return MCDisassembler::Fail;
4942 static DecodeStatus DecodeT2Adr(MCInst &Inst, uint32_t Insn,
4943 uint64_t Address, const void *Decoder) {
4944 unsigned sign1 = fieldFromInstruction(Insn, 21, 1);
4945 unsigned sign2 = fieldFromInstruction(Insn, 23, 1);
4946 if (sign1 != sign2) return MCDisassembler::Fail;
4948 unsigned Val = fieldFromInstruction(Insn, 0, 8);
4949 Val |= fieldFromInstruction(Insn, 12, 3) << 8;
4950 Val |= fieldFromInstruction(Insn, 26, 1) << 11;
4952 Inst.addOperand(MCOperand::CreateImm(SignExtend32<13>(Val)));
4954 return MCDisassembler::Success;
4957 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, uint32_t Val,
4959 const void *Decoder) {
4960 DecodeStatus S = MCDisassembler::Success;
4962 // Shift of "asr #32" is not allowed in Thumb2 mode.
4963 if (Val == 0x20) S = MCDisassembler::SoftFail;
4964 Inst.addOperand(MCOperand::CreateImm(Val));
4968 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
4969 uint64_t Address, const void *Decoder) {
4970 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4971 unsigned Rt2 = fieldFromInstruction(Insn, 0, 4);
4972 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4973 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4976 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
4978 DecodeStatus S = MCDisassembler::Success;
4980 if (Rt == Rn || Rn == Rt2)
4981 S = MCDisassembler::SoftFail;
4983 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4984 return MCDisassembler::Fail;
4985 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
4986 return MCDisassembler::Fail;
4987 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4988 return MCDisassembler::Fail;
4989 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4990 return MCDisassembler::Fail;
4995 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
4996 uint64_t Address, const void *Decoder) {
4997 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
4998 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
4999 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
5000 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
5001 unsigned imm = fieldFromInstruction(Insn, 16, 6);
5002 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
5003 unsigned op = fieldFromInstruction(Insn, 5, 1);
5005 DecodeStatus S = MCDisassembler::Success;
5007 // VMOVv2f32 is ambiguous with these decodings.
5008 if (!(imm & 0x38) && cmode == 0xF) {
5009 if (op == 1) return MCDisassembler::Fail;
5010 Inst.setOpcode(ARM::VMOVv2f32);
5011 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
5014 if (!(imm & 0x20)) return MCDisassembler::Fail;
5016 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
5017 return MCDisassembler::Fail;
5018 if (!Check(S, DecodeDPRRegisterClass(Inst, Vm, Address, Decoder)))
5019 return MCDisassembler::Fail;
5020 Inst.addOperand(MCOperand::CreateImm(64 - imm));
5025 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
5026 uint64_t Address, const void *Decoder) {
5027 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
5028 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
5029 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
5030 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
5031 unsigned imm = fieldFromInstruction(Insn, 16, 6);
5032 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
5033 unsigned op = fieldFromInstruction(Insn, 5, 1);
5035 DecodeStatus S = MCDisassembler::Success;
5037 // VMOVv4f32 is ambiguous with these decodings.
5038 if (!(imm & 0x38) && cmode == 0xF) {
5039 if (op == 1) return MCDisassembler::Fail;
5040 Inst.setOpcode(ARM::VMOVv4f32);
5041 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
5044 if (!(imm & 0x20)) return MCDisassembler::Fail;
5046 if (!Check(S, DecodeQPRRegisterClass(Inst, Vd, Address, Decoder)))
5047 return MCDisassembler::Fail;
5048 if (!Check(S, DecodeQPRRegisterClass(Inst, Vm, Address, Decoder)))
5049 return MCDisassembler::Fail;
5050 Inst.addOperand(MCOperand::CreateImm(64 - imm));
5055 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
5056 uint64_t Address, const void *Decoder) {
5057 DecodeStatus S = MCDisassembler::Success;
5059 unsigned Rn = fieldFromInstruction(Val, 16, 4);
5060 unsigned Rt = fieldFromInstruction(Val, 12, 4);
5061 unsigned Rm = fieldFromInstruction(Val, 0, 4);
5062 Rm |= (fieldFromInstruction(Val, 23, 1) << 4);
5063 unsigned Cond = fieldFromInstruction(Val, 28, 4);
5065 if (fieldFromInstruction(Val, 8, 4) != 0 || Rn == Rt)
5066 S = MCDisassembler::SoftFail;
5068 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
5069 return MCDisassembler::Fail;
5070 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
5071 return MCDisassembler::Fail;
5072 if (!Check(S, DecodeAddrMode7Operand(Inst, Rn, Address, Decoder)))
5073 return MCDisassembler::Fail;
5074 if (!Check(S, DecodePostIdxReg(Inst, Rm, Address, Decoder)))
5075 return MCDisassembler::Fail;
5076 if (!Check(S, DecodePredicateOperand(Inst, Cond, Address, Decoder)))
5077 return MCDisassembler::Fail;
5082 static DecodeStatus DecodeMRRC2(llvm::MCInst &Inst, unsigned Val,
5083 uint64_t Address, const void *Decoder) {
5085 DecodeStatus S = MCDisassembler::Success;
5087 unsigned CRm = fieldFromInstruction(Val, 0, 4);
5088 unsigned opc1 = fieldFromInstruction(Val, 4, 4);
5089 unsigned cop = fieldFromInstruction(Val, 8, 4);
5090 unsigned Rt = fieldFromInstruction(Val, 12, 4);
5091 unsigned Rt2 = fieldFromInstruction(Val, 16, 4);
5093 if ((cop & ~0x1) == 0xa)
5094 return MCDisassembler::Fail;
5097 S = MCDisassembler::SoftFail;
5099 Inst.addOperand(MCOperand::CreateImm(cop));
5100 Inst.addOperand(MCOperand::CreateImm(opc1));
5101 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
5102 return MCDisassembler::Fail;
5103 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
5104 return MCDisassembler::Fail;
5105 Inst.addOperand(MCOperand::CreateImm(CRm));