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 #define DEBUG_TYPE "arm-disassembler"
12 #include "llvm/MC/MCDisassembler.h"
13 #include "MCTargetDesc/ARMAddressingModes.h"
14 #include "MCTargetDesc/ARMBaseInfo.h"
15 #include "MCTargetDesc/ARMMCExpr.h"
16 #include "llvm/MC/MCContext.h"
17 #include "llvm/MC/MCExpr.h"
18 #include "llvm/MC/MCFixedLenDisassembler.h"
19 #include "llvm/MC/MCInst.h"
20 #include "llvm/MC/MCInstrDesc.h"
21 #include "llvm/MC/MCSubtargetInfo.h"
22 #include "llvm/Support/Debug.h"
23 #include "llvm/Support/ErrorHandling.h"
24 #include "llvm/Support/LEB128.h"
25 #include "llvm/Support/MemoryObject.h"
26 #include "llvm/Support/TargetRegistry.h"
27 #include "llvm/Support/raw_ostream.h"
32 typedef MCDisassembler::DecodeStatus DecodeStatus;
35 // Handles the condition code status of instructions in IT blocks
39 // Returns the condition code for instruction in IT block
41 unsigned CC = ARMCC::AL;
47 // Advances the IT block state to the next T or E
48 void advanceITState() {
52 // Returns true if the current instruction is in an IT block
53 bool instrInITBlock() {
54 return !ITStates.empty();
57 // Returns true if current instruction is the last instruction in an IT block
58 bool instrLastInITBlock() {
59 return ITStates.size() == 1;
62 // Called when decoding an IT instruction. Sets the IT state for the following
63 // instructions that for the IT block. Firstcond and Mask correspond to the
64 // fields in the IT instruction encoding.
65 void setITState(char Firstcond, char Mask) {
66 // (3 - the number of trailing zeros) is the number of then / else.
67 unsigned CondBit0 = Firstcond & 1;
68 unsigned NumTZ = countTrailingZeros<uint8_t>(Mask);
69 unsigned char CCBits = static_cast<unsigned char>(Firstcond & 0xf);
70 assert(NumTZ <= 3 && "Invalid IT mask!");
71 // push condition codes onto the stack the correct order for the pops
72 for (unsigned Pos = NumTZ+1; Pos <= 3; ++Pos) {
73 bool T = ((Mask >> Pos) & 1) == CondBit0;
75 ITStates.push_back(CCBits);
77 ITStates.push_back(CCBits ^ 1);
79 ITStates.push_back(CCBits);
83 std::vector<unsigned char> ITStates;
88 /// ARMDisassembler - ARM disassembler for all ARM platforms.
89 class ARMDisassembler : public MCDisassembler {
91 /// Constructor - Initializes the disassembler.
93 ARMDisassembler(const MCSubtargetInfo &STI) :
100 /// getInstruction - See MCDisassembler.
101 DecodeStatus getInstruction(MCInst &instr,
103 const MemoryObject ®ion,
105 raw_ostream &vStream,
106 raw_ostream &cStream) const;
109 /// ThumbDisassembler - Thumb disassembler for all Thumb platforms.
110 class ThumbDisassembler : public MCDisassembler {
112 /// Constructor - Initializes the disassembler.
114 ThumbDisassembler(const MCSubtargetInfo &STI) :
115 MCDisassembler(STI) {
118 ~ThumbDisassembler() {
121 /// getInstruction - See MCDisassembler.
122 DecodeStatus getInstruction(MCInst &instr,
124 const MemoryObject ®ion,
126 raw_ostream &vStream,
127 raw_ostream &cStream) const;
130 mutable ITStatus ITBlock;
131 DecodeStatus AddThumbPredicate(MCInst&) const;
132 void UpdateThumbVFPPredicate(MCInst&) const;
136 static bool Check(DecodeStatus &Out, DecodeStatus In) {
138 case MCDisassembler::Success:
139 // Out stays the same.
141 case MCDisassembler::SoftFail:
144 case MCDisassembler::Fail:
148 llvm_unreachable("Invalid DecodeStatus!");
152 // Forward declare these because the autogenerated code will reference them.
153 // Definitions are further down.
154 static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
155 uint64_t Address, const void *Decoder);
156 static DecodeStatus DecodeGPRnopcRegisterClass(MCInst &Inst,
157 unsigned RegNo, uint64_t Address,
158 const void *Decoder);
159 static DecodeStatus DecodeGPRwithAPSRRegisterClass(MCInst &Inst,
160 unsigned RegNo, uint64_t Address,
161 const void *Decoder);
162 static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
163 uint64_t Address, const void *Decoder);
164 static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
165 uint64_t Address, const void *Decoder);
166 static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
167 uint64_t Address, const void *Decoder);
168 static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
169 uint64_t Address, const void *Decoder);
170 static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
171 uint64_t Address, const void *Decoder);
172 static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
173 uint64_t Address, const void *Decoder);
174 static DecodeStatus DecodeDPR_VFP2RegisterClass(MCInst &Inst,
177 const void *Decoder);
178 static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
179 uint64_t Address, const void *Decoder);
180 static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
181 uint64_t Address, const void *Decoder);
182 static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
183 unsigned RegNo, uint64_t Address,
184 const void *Decoder);
186 static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
187 uint64_t Address, const void *Decoder);
188 static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
189 uint64_t Address, const void *Decoder);
190 static DecodeStatus DecodeSOImmOperand(MCInst &Inst, unsigned Val,
191 uint64_t Address, const void *Decoder);
192 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
193 uint64_t Address, const void *Decoder);
194 static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
195 uint64_t Address, const void *Decoder);
196 static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
197 uint64_t Address, const void *Decoder);
199 static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Insn,
200 uint64_t Address, const void *Decoder);
201 static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
202 uint64_t Address, const void *Decoder);
203 static DecodeStatus DecodeAddrMode2IdxInstruction(MCInst &Inst,
206 const void *Decoder);
207 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Insn,
208 uint64_t Address, const void *Decoder);
209 static DecodeStatus DecodeAddrMode3Instruction(MCInst &Inst,unsigned Insn,
210 uint64_t Address, const void *Decoder);
211 static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Insn,
212 uint64_t Address, const void *Decoder);
213 static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Insn,
214 uint64_t Address, const void *Decoder);
216 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst & Inst,
219 const void *Decoder);
220 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
221 uint64_t Address, const void *Decoder);
222 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
223 uint64_t Address, const void *Decoder);
224 static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
225 uint64_t Address, const void *Decoder);
226 static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
227 uint64_t Address, const void *Decoder);
228 static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
229 uint64_t Address, const void *Decoder);
230 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
231 uint64_t Address, const void *Decoder);
232 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
233 uint64_t Address, const void *Decoder);
234 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
235 uint64_t Address, const void *Decoder);
236 static DecodeStatus DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
237 uint64_t Address, const void *Decoder);
238 static DecodeStatus DecodeBranchImmInstruction(MCInst &Inst,unsigned Insn,
239 uint64_t Address, const void *Decoder);
240 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
241 uint64_t Address, const void *Decoder);
242 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Val,
243 uint64_t Address, const void *Decoder);
244 static DecodeStatus DecodeVST1Instruction(MCInst &Inst, unsigned Val,
245 uint64_t Address, const void *Decoder);
246 static DecodeStatus DecodeVST2Instruction(MCInst &Inst, unsigned Val,
247 uint64_t Address, const void *Decoder);
248 static DecodeStatus DecodeVST3Instruction(MCInst &Inst, unsigned Val,
249 uint64_t Address, const void *Decoder);
250 static DecodeStatus DecodeVST4Instruction(MCInst &Inst, unsigned Val,
251 uint64_t Address, const void *Decoder);
252 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Val,
253 uint64_t Address, const void *Decoder);
254 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Val,
255 uint64_t Address, const void *Decoder);
256 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Val,
257 uint64_t Address, const void *Decoder);
258 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Val,
259 uint64_t Address, const void *Decoder);
260 static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Val,
261 uint64_t Address, const void *Decoder);
262 static DecodeStatus DecodeNEONModImmInstruction(MCInst &Inst,unsigned Val,
263 uint64_t Address, const void *Decoder);
264 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Val,
265 uint64_t Address, const void *Decoder);
266 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
267 uint64_t Address, const void *Decoder);
268 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
269 uint64_t Address, const void *Decoder);
270 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
271 uint64_t Address, const void *Decoder);
272 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
273 uint64_t Address, const void *Decoder);
274 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
275 uint64_t Address, const void *Decoder);
276 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
277 uint64_t Address, const void *Decoder);
278 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Insn,
279 uint64_t Address, const void *Decoder);
280 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Insn,
281 uint64_t Address, const void *Decoder);
282 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Insn,
283 uint64_t Address, const void *Decoder);
284 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
285 uint64_t Address, const void *Decoder);
286 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
287 uint64_t Address, const void *Decoder);
288 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
289 uint64_t Address, const void *Decoder);
290 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
291 uint64_t Address, const void *Decoder);
292 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
293 uint64_t Address, const void *Decoder);
294 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
295 uint64_t Address, const void *Decoder);
296 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
297 uint64_t Address, const void *Decoder);
298 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
299 uint64_t Address, const void *Decoder);
300 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
301 uint64_t Address, const void *Decoder);
302 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
303 uint64_t Address, const void *Decoder);
304 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
305 uint64_t Address, const void *Decoder);
306 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
307 uint64_t Address, const void *Decoder);
308 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
309 uint64_t Address, const void *Decoder);
310 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
311 uint64_t Address, const void *Decoder);
312 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
313 uint64_t Address, const void *Decoder);
314 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
315 uint64_t Address, const void *Decoder);
316 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
317 uint64_t Address, const void *Decoder);
318 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
319 uint64_t Address, const void *Decoder);
320 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
321 uint64_t Address, const void *Decoder);
322 static DecodeStatus DecodeImm0_4(MCInst &Inst, unsigned Insn, uint64_t Address,
323 const void *Decoder);
326 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
327 uint64_t Address, const void *Decoder);
328 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
329 uint64_t Address, const void *Decoder);
330 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
331 uint64_t Address, const void *Decoder);
332 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
333 uint64_t Address, const void *Decoder);
334 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
335 uint64_t Address, const void *Decoder);
336 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
337 uint64_t Address, const void *Decoder);
338 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
339 uint64_t Address, const void *Decoder);
340 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
341 uint64_t Address, const void *Decoder);
342 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
343 uint64_t Address, const void *Decoder);
344 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Val,
345 uint64_t Address, const void *Decoder);
346 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
347 uint64_t Address, const void *Decoder);
348 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
349 uint64_t Address, const void *Decoder);
350 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
351 uint64_t Address, const void *Decoder);
352 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
353 uint64_t Address, const void *Decoder);
354 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
355 uint64_t Address, const void *Decoder);
356 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Val,
357 uint64_t Address, const void *Decoder);
358 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
359 uint64_t Address, const void *Decoder);
360 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
361 uint64_t Address, const void *Decoder);
362 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Insn,
363 uint64_t Address, const void *Decoder);
364 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
365 uint64_t Address, const void *Decoder);
366 static DecodeStatus DecodeThumbTableBranch(MCInst &Inst, unsigned Val,
367 uint64_t Address, const void *Decoder);
368 static DecodeStatus DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Val,
369 uint64_t Address, const void *Decoder);
370 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
371 uint64_t Address, const void *Decoder);
372 static DecodeStatus DecodeThumbBCCTargetOperand(MCInst &Inst,unsigned Val,
373 uint64_t Address, const void *Decoder);
374 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
375 uint64_t Address, const void *Decoder);
376 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Val,
377 uint64_t Address, const void *Decoder);
378 static DecodeStatus DecodeT2LDRDPreInstruction(MCInst &Inst,unsigned Insn,
379 uint64_t Address, const void *Decoder);
380 static DecodeStatus DecodeT2STRDPreInstruction(MCInst &Inst,unsigned Insn,
381 uint64_t Address, const void *Decoder);
382 static DecodeStatus DecodeT2Adr(MCInst &Inst, unsigned Val,
383 uint64_t Address, const void *Decoder);
384 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Val,
385 uint64_t Address, const void *Decoder);
386 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, unsigned Val,
387 uint64_t Address, const void *Decoder);
389 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
390 uint64_t Address, const void *Decoder);
391 static DecodeStatus DecodeMRRC2(llvm::MCInst &Inst, unsigned Val,
392 uint64_t Address, const void *Decoder);
393 #include "ARMGenDisassemblerTables.inc"
395 static MCDisassembler *createARMDisassembler(const Target &T, const MCSubtargetInfo &STI) {
396 return new ARMDisassembler(STI);
399 static MCDisassembler *createThumbDisassembler(const Target &T, const MCSubtargetInfo &STI) {
400 return new ThumbDisassembler(STI);
403 DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
404 const MemoryObject &Region,
407 raw_ostream &cs) const {
412 assert(!(STI.getFeatureBits() & ARM::ModeThumb) &&
413 "Asked to disassemble an ARM instruction but Subtarget is in Thumb mode!");
415 // We want to read exactly 4 bytes of data.
416 if (Region.readBytes(Address, 4, bytes) == -1) {
418 return MCDisassembler::Fail;
421 // Encoded as a small-endian 32-bit word in the stream.
422 uint32_t insn = (bytes[3] << 24) |
427 // Calling the auto-generated decoder function.
428 DecodeStatus result = decodeInstruction(DecoderTableARM32, MI, insn,
430 if (result != MCDisassembler::Fail) {
435 // VFP and NEON instructions, similarly, are shared between ARM
438 result = decodeInstruction(DecoderTableVFP32, MI, insn, Address, this, STI);
439 if (result != MCDisassembler::Fail) {
445 result = decodeInstruction(DecoderTableNEONData32, MI, insn, Address,
447 if (result != MCDisassembler::Fail) {
449 // Add a fake predicate operand, because we share these instruction
450 // definitions with Thumb2 where these instructions are predicable.
451 if (!DecodePredicateOperand(MI, 0xE, Address, this))
452 return MCDisassembler::Fail;
457 result = decodeInstruction(DecoderTableNEONLoadStore32, MI, insn, Address,
459 if (result != MCDisassembler::Fail) {
461 // Add a fake predicate operand, because we share these instruction
462 // definitions with Thumb2 where these instructions are predicable.
463 if (!DecodePredicateOperand(MI, 0xE, Address, this))
464 return MCDisassembler::Fail;
469 result = decodeInstruction(DecoderTableNEONDup32, MI, insn, Address,
471 if (result != MCDisassembler::Fail) {
473 // Add a fake predicate operand, because we share these instruction
474 // definitions with Thumb2 where these instructions are predicable.
475 if (!DecodePredicateOperand(MI, 0xE, Address, this))
476 return MCDisassembler::Fail;
483 return MCDisassembler::Fail;
487 extern const MCInstrDesc ARMInsts[];
490 /// tryAddingSymbolicOperand - trys to add a symbolic operand in place of the
491 /// immediate Value in the MCInst. The immediate Value has had any PC
492 /// adjustment made by the caller. If the instruction is a branch instruction
493 /// then isBranch is true, else false. If the getOpInfo() function was set as
494 /// part of the setupForSymbolicDisassembly() call then that function is called
495 /// to get any symbolic information at the Address for this instruction. If
496 /// that returns non-zero then the symbolic information it returns is used to
497 /// create an MCExpr and that is added as an operand to the MCInst. If
498 /// getOpInfo() returns zero and isBranch is true then a symbol look up for
499 /// Value is done and if a symbol is found an MCExpr is created with that, else
500 /// an MCExpr with Value is created. This function returns true if it adds an
501 /// operand to the MCInst and false otherwise.
502 static bool tryAddingSymbolicOperand(uint64_t Address, int32_t Value,
503 bool isBranch, uint64_t InstSize,
504 MCInst &MI, const void *Decoder) {
505 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
506 // FIXME: Does it make sense for value to be negative?
507 return Dis->tryAddingSymbolicOperand(MI, (uint32_t)Value, Address, isBranch,
508 /* Offset */ 0, InstSize);
511 /// tryAddingPcLoadReferenceComment - trys to add a comment as to what is being
512 /// referenced by a load instruction with the base register that is the Pc.
513 /// These can often be values in a literal pool near the Address of the
514 /// instruction. The Address of the instruction and its immediate Value are
515 /// used as a possible literal pool entry. The SymbolLookUp call back will
516 /// return the name of a symbol referenced by the literal pool's entry if
517 /// the referenced address is that of a symbol. Or it will return a pointer to
518 /// a literal 'C' string if the referenced address of the literal pool's entry
519 /// is an address into a section with 'C' string literals.
520 static void tryAddingPcLoadReferenceComment(uint64_t Address, int Value,
521 const void *Decoder) {
522 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
523 Dis->tryAddingPcLoadReferenceComment(Value, Address);
526 // Thumb1 instructions don't have explicit S bits. Rather, they
527 // implicitly set CPSR. Since it's not represented in the encoding, the
528 // auto-generated decoder won't inject the CPSR operand. We need to fix
529 // that as a post-pass.
530 static void AddThumb1SBit(MCInst &MI, bool InITBlock) {
531 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
532 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
533 MCInst::iterator I = MI.begin();
534 for (unsigned i = 0; i < NumOps; ++i, ++I) {
535 if (I == MI.end()) break;
536 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) {
537 if (i > 0 && OpInfo[i-1].isPredicate()) continue;
538 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
543 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
546 // Most Thumb instructions don't have explicit predicates in the
547 // encoding, but rather get their predicates from IT context. We need
548 // to fix up the predicate operands using this context information as a
550 MCDisassembler::DecodeStatus
551 ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
552 MCDisassembler::DecodeStatus S = Success;
554 // A few instructions actually have predicates encoded in them. Don't
555 // try to overwrite it if we're seeing one of those.
556 switch (MI.getOpcode()) {
567 // Some instructions (mostly conditional branches) are not
568 // allowed in IT blocks.
569 if (ITBlock.instrInITBlock())
578 // Some instructions (mostly unconditional branches) can
579 // only appears at the end of, or outside of, an IT.
580 if (ITBlock.instrInITBlock() && !ITBlock.instrLastInITBlock())
587 // If we're in an IT block, base the predicate on that. Otherwise,
588 // assume a predicate of AL.
590 CC = ITBlock.getITCC();
593 if (ITBlock.instrInITBlock())
594 ITBlock.advanceITState();
596 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
597 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
598 MCInst::iterator I = MI.begin();
599 for (unsigned i = 0; i < NumOps; ++i, ++I) {
600 if (I == MI.end()) break;
601 if (OpInfo[i].isPredicate()) {
602 I = MI.insert(I, MCOperand::CreateImm(CC));
605 MI.insert(I, MCOperand::CreateReg(0));
607 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
612 I = MI.insert(I, MCOperand::CreateImm(CC));
615 MI.insert(I, MCOperand::CreateReg(0));
617 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
622 // Thumb VFP instructions are a special case. Because we share their
623 // encodings between ARM and Thumb modes, and they are predicable in ARM
624 // mode, the auto-generated decoder will give them an (incorrect)
625 // predicate operand. We need to rewrite these operands based on the IT
626 // context as a post-pass.
627 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
629 CC = ITBlock.getITCC();
630 if (ITBlock.instrInITBlock())
631 ITBlock.advanceITState();
633 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
634 MCInst::iterator I = MI.begin();
635 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
636 for (unsigned i = 0; i < NumOps; ++i, ++I) {
637 if (OpInfo[i].isPredicate() ) {
643 I->setReg(ARM::CPSR);
649 DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
650 const MemoryObject &Region,
653 raw_ostream &cs) const {
658 assert((STI.getFeatureBits() & ARM::ModeThumb) &&
659 "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!");
661 // We want to read exactly 2 bytes of data.
662 if (Region.readBytes(Address, 2, bytes) == -1) {
664 return MCDisassembler::Fail;
667 uint16_t insn16 = (bytes[1] << 8) | bytes[0];
668 DecodeStatus result = decodeInstruction(DecoderTableThumb16, MI, insn16,
670 if (result != MCDisassembler::Fail) {
672 Check(result, AddThumbPredicate(MI));
677 result = decodeInstruction(DecoderTableThumbSBit16, MI, insn16,
681 bool InITBlock = ITBlock.instrInITBlock();
682 Check(result, AddThumbPredicate(MI));
683 AddThumb1SBit(MI, InITBlock);
688 result = decodeInstruction(DecoderTableThumb216, MI, insn16,
690 if (result != MCDisassembler::Fail) {
693 // Nested IT blocks are UNPREDICTABLE. Must be checked before we add
694 // the Thumb predicate.
695 if (MI.getOpcode() == ARM::t2IT && ITBlock.instrInITBlock())
696 result = MCDisassembler::SoftFail;
698 Check(result, AddThumbPredicate(MI));
700 // If we find an IT instruction, we need to parse its condition
701 // code and mask operands so that we can apply them correctly
702 // to the subsequent instructions.
703 if (MI.getOpcode() == ARM::t2IT) {
705 unsigned Firstcond = MI.getOperand(0).getImm();
706 unsigned Mask = MI.getOperand(1).getImm();
707 ITBlock.setITState(Firstcond, Mask);
713 // We want to read exactly 4 bytes of data.
714 if (Region.readBytes(Address, 4, bytes) == -1) {
716 return MCDisassembler::Fail;
719 uint32_t insn32 = (bytes[3] << 8) |
724 result = decodeInstruction(DecoderTableThumb32, MI, insn32, Address,
726 if (result != MCDisassembler::Fail) {
728 bool InITBlock = ITBlock.instrInITBlock();
729 Check(result, AddThumbPredicate(MI));
730 AddThumb1SBit(MI, InITBlock);
735 result = decodeInstruction(DecoderTableThumb232, MI, insn32, Address,
737 if (result != MCDisassembler::Fail) {
739 Check(result, AddThumbPredicate(MI));
744 result = decodeInstruction(DecoderTableVFP32, MI, insn32, Address, this, STI);
745 if (result != MCDisassembler::Fail) {
747 UpdateThumbVFPPredicate(MI);
752 result = decodeInstruction(DecoderTableNEONDup32, MI, insn32, Address,
754 if (result != MCDisassembler::Fail) {
756 Check(result, AddThumbPredicate(MI));
760 if (fieldFromInstruction(insn32, 24, 8) == 0xF9) {
762 uint32_t NEONLdStInsn = insn32;
763 NEONLdStInsn &= 0xF0FFFFFF;
764 NEONLdStInsn |= 0x04000000;
765 result = decodeInstruction(DecoderTableNEONLoadStore32, MI, NEONLdStInsn,
767 if (result != MCDisassembler::Fail) {
769 Check(result, AddThumbPredicate(MI));
774 if (fieldFromInstruction(insn32, 24, 4) == 0xF) {
776 uint32_t NEONDataInsn = insn32;
777 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
778 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
779 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
780 result = decodeInstruction(DecoderTableNEONData32, MI, NEONDataInsn,
782 if (result != MCDisassembler::Fail) {
784 Check(result, AddThumbPredicate(MI));
790 return MCDisassembler::Fail;
794 extern "C" void LLVMInitializeARMDisassembler() {
795 TargetRegistry::RegisterMCDisassembler(TheARMTarget,
796 createARMDisassembler);
797 TargetRegistry::RegisterMCDisassembler(TheThumbTarget,
798 createThumbDisassembler);
801 static const uint16_t GPRDecoderTable[] = {
802 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
803 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
804 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
805 ARM::R12, ARM::SP, ARM::LR, ARM::PC
808 static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
809 uint64_t Address, const void *Decoder) {
811 return MCDisassembler::Fail;
813 unsigned Register = GPRDecoderTable[RegNo];
814 Inst.addOperand(MCOperand::CreateReg(Register));
815 return MCDisassembler::Success;
819 DecodeGPRnopcRegisterClass(MCInst &Inst, unsigned RegNo,
820 uint64_t Address, const void *Decoder) {
821 DecodeStatus S = MCDisassembler::Success;
824 S = MCDisassembler::SoftFail;
826 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
832 DecodeGPRwithAPSRRegisterClass(MCInst &Inst, unsigned RegNo,
833 uint64_t Address, const void *Decoder) {
834 DecodeStatus S = MCDisassembler::Success;
838 Inst.addOperand(MCOperand::CreateReg(ARM::APSR_NZCV));
839 return MCDisassembler::Success;
842 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
846 static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
847 uint64_t Address, const void *Decoder) {
849 return MCDisassembler::Fail;
850 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
853 static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
854 uint64_t Address, const void *Decoder) {
855 unsigned Register = 0;
876 return MCDisassembler::Fail;
879 Inst.addOperand(MCOperand::CreateReg(Register));
880 return MCDisassembler::Success;
883 static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
884 uint64_t Address, const void *Decoder) {
885 if (RegNo == 13 || RegNo == 15) return MCDisassembler::Fail;
886 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
889 static const uint16_t SPRDecoderTable[] = {
890 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
891 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
892 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
893 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
894 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
895 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
896 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
897 ARM::S28, ARM::S29, ARM::S30, ARM::S31
900 static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
901 uint64_t Address, const void *Decoder) {
903 return MCDisassembler::Fail;
905 unsigned Register = SPRDecoderTable[RegNo];
906 Inst.addOperand(MCOperand::CreateReg(Register));
907 return MCDisassembler::Success;
910 static const uint16_t DPRDecoderTable[] = {
911 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
912 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
913 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
914 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
915 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
916 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
917 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
918 ARM::D28, ARM::D29, ARM::D30, ARM::D31
921 static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
922 uint64_t Address, const void *Decoder) {
924 return MCDisassembler::Fail;
926 unsigned Register = DPRDecoderTable[RegNo];
927 Inst.addOperand(MCOperand::CreateReg(Register));
928 return MCDisassembler::Success;
931 static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
932 uint64_t Address, const void *Decoder) {
934 return MCDisassembler::Fail;
935 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
939 DecodeDPR_VFP2RegisterClass(MCInst &Inst, unsigned RegNo,
940 uint64_t Address, const void *Decoder) {
942 return MCDisassembler::Fail;
943 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
946 static const uint16_t QPRDecoderTable[] = {
947 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
948 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
949 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
950 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
954 static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
955 uint64_t Address, const void *Decoder) {
956 if (RegNo > 31 || (RegNo & 1) != 0)
957 return MCDisassembler::Fail;
960 unsigned Register = QPRDecoderTable[RegNo];
961 Inst.addOperand(MCOperand::CreateReg(Register));
962 return MCDisassembler::Success;
965 static const uint16_t DPairDecoderTable[] = {
966 ARM::Q0, ARM::D1_D2, ARM::Q1, ARM::D3_D4, ARM::Q2, ARM::D5_D6,
967 ARM::Q3, ARM::D7_D8, ARM::Q4, ARM::D9_D10, ARM::Q5, ARM::D11_D12,
968 ARM::Q6, ARM::D13_D14, ARM::Q7, ARM::D15_D16, ARM::Q8, ARM::D17_D18,
969 ARM::Q9, ARM::D19_D20, ARM::Q10, ARM::D21_D22, ARM::Q11, ARM::D23_D24,
970 ARM::Q12, ARM::D25_D26, ARM::Q13, ARM::D27_D28, ARM::Q14, ARM::D29_D30,
974 static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
975 uint64_t Address, const void *Decoder) {
977 return MCDisassembler::Fail;
979 unsigned Register = DPairDecoderTable[RegNo];
980 Inst.addOperand(MCOperand::CreateReg(Register));
981 return MCDisassembler::Success;
984 static const uint16_t DPairSpacedDecoderTable[] = {
985 ARM::D0_D2, ARM::D1_D3, ARM::D2_D4, ARM::D3_D5,
986 ARM::D4_D6, ARM::D5_D7, ARM::D6_D8, ARM::D7_D9,
987 ARM::D8_D10, ARM::D9_D11, ARM::D10_D12, ARM::D11_D13,
988 ARM::D12_D14, ARM::D13_D15, ARM::D14_D16, ARM::D15_D17,
989 ARM::D16_D18, ARM::D17_D19, ARM::D18_D20, ARM::D19_D21,
990 ARM::D20_D22, ARM::D21_D23, ARM::D22_D24, ARM::D23_D25,
991 ARM::D24_D26, ARM::D25_D27, ARM::D26_D28, ARM::D27_D29,
992 ARM::D28_D30, ARM::D29_D31
995 static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
998 const void *Decoder) {
1000 return MCDisassembler::Fail;
1002 unsigned Register = DPairSpacedDecoderTable[RegNo];
1003 Inst.addOperand(MCOperand::CreateReg(Register));
1004 return MCDisassembler::Success;
1007 static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
1008 uint64_t Address, const void *Decoder) {
1009 if (Val == 0xF) return MCDisassembler::Fail;
1010 // AL predicate is not allowed on Thumb1 branches.
1011 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
1012 return MCDisassembler::Fail;
1013 Inst.addOperand(MCOperand::CreateImm(Val));
1014 if (Val == ARMCC::AL) {
1015 Inst.addOperand(MCOperand::CreateReg(0));
1017 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1018 return MCDisassembler::Success;
1021 static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
1022 uint64_t Address, const void *Decoder) {
1024 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1026 Inst.addOperand(MCOperand::CreateReg(0));
1027 return MCDisassembler::Success;
1030 static DecodeStatus DecodeSOImmOperand(MCInst &Inst, unsigned Val,
1031 uint64_t Address, const void *Decoder) {
1032 uint32_t imm = Val & 0xFF;
1033 uint32_t rot = (Val & 0xF00) >> 7;
1034 uint32_t rot_imm = (imm >> rot) | (imm << ((32-rot) & 0x1F));
1035 Inst.addOperand(MCOperand::CreateImm(rot_imm));
1036 return MCDisassembler::Success;
1039 static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Val,
1040 uint64_t Address, const void *Decoder) {
1041 DecodeStatus S = MCDisassembler::Success;
1043 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1044 unsigned type = fieldFromInstruction(Val, 5, 2);
1045 unsigned imm = fieldFromInstruction(Val, 7, 5);
1047 // Register-immediate
1048 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1049 return MCDisassembler::Fail;
1051 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1054 Shift = ARM_AM::lsl;
1057 Shift = ARM_AM::lsr;
1060 Shift = ARM_AM::asr;
1063 Shift = ARM_AM::ror;
1067 if (Shift == ARM_AM::ror && imm == 0)
1068 Shift = ARM_AM::rrx;
1070 unsigned Op = Shift | (imm << 3);
1071 Inst.addOperand(MCOperand::CreateImm(Op));
1076 static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Val,
1077 uint64_t Address, const void *Decoder) {
1078 DecodeStatus S = MCDisassembler::Success;
1080 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1081 unsigned type = fieldFromInstruction(Val, 5, 2);
1082 unsigned Rs = fieldFromInstruction(Val, 8, 4);
1084 // Register-register
1085 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1086 return MCDisassembler::Fail;
1087 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)))
1088 return MCDisassembler::Fail;
1090 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1093 Shift = ARM_AM::lsl;
1096 Shift = ARM_AM::lsr;
1099 Shift = ARM_AM::asr;
1102 Shift = ARM_AM::ror;
1106 Inst.addOperand(MCOperand::CreateImm(Shift));
1111 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
1112 uint64_t Address, const void *Decoder) {
1113 DecodeStatus S = MCDisassembler::Success;
1115 bool writebackLoad = false;
1116 unsigned writebackReg = 0;
1117 switch (Inst.getOpcode()) {
1120 case ARM::LDMIA_UPD:
1121 case ARM::LDMDB_UPD:
1122 case ARM::LDMIB_UPD:
1123 case ARM::LDMDA_UPD:
1124 case ARM::t2LDMIA_UPD:
1125 case ARM::t2LDMDB_UPD:
1126 writebackLoad = true;
1127 writebackReg = Inst.getOperand(0).getReg();
1131 // Empty register lists are not allowed.
1132 if (Val == 0) return MCDisassembler::Fail;
1133 for (unsigned i = 0; i < 16; ++i) {
1134 if (Val & (1 << i)) {
1135 if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder)))
1136 return MCDisassembler::Fail;
1137 // Writeback not allowed if Rn is in the target list.
1138 if (writebackLoad && writebackReg == Inst.end()[-1].getReg())
1139 Check(S, MCDisassembler::SoftFail);
1146 static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
1147 uint64_t Address, const void *Decoder) {
1148 DecodeStatus S = MCDisassembler::Success;
1150 unsigned Vd = fieldFromInstruction(Val, 8, 5);
1151 unsigned regs = fieldFromInstruction(Val, 0, 8);
1153 // In case of unpredictable encoding, tweak the operands.
1154 if (regs == 0 || (Vd + regs) > 32) {
1155 regs = Vd + regs > 32 ? 32 - Vd : regs;
1156 regs = std::max( 1u, regs);
1157 S = MCDisassembler::SoftFail;
1160 if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
1161 return MCDisassembler::Fail;
1162 for (unsigned i = 0; i < (regs - 1); ++i) {
1163 if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1164 return MCDisassembler::Fail;
1170 static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
1171 uint64_t Address, const void *Decoder) {
1172 DecodeStatus S = MCDisassembler::Success;
1174 unsigned Vd = fieldFromInstruction(Val, 8, 5);
1175 unsigned regs = fieldFromInstruction(Val, 1, 7);
1177 // In case of unpredictable encoding, tweak the operands.
1178 if (regs == 0 || regs > 16 || (Vd + regs) > 32) {
1179 regs = Vd + regs > 32 ? 32 - Vd : regs;
1180 regs = std::max( 1u, regs);
1181 regs = std::min(16u, regs);
1182 S = MCDisassembler::SoftFail;
1185 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
1186 return MCDisassembler::Fail;
1187 for (unsigned i = 0; i < (regs - 1); ++i) {
1188 if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1189 return MCDisassembler::Fail;
1195 static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Val,
1196 uint64_t Address, const void *Decoder) {
1197 // This operand encodes a mask of contiguous zeros between a specified MSB
1198 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
1199 // the mask of all bits LSB-and-lower, and then xor them to create
1200 // the mask of that's all ones on [msb, lsb]. Finally we not it to
1201 // create the final mask.
1202 unsigned msb = fieldFromInstruction(Val, 5, 5);
1203 unsigned lsb = fieldFromInstruction(Val, 0, 5);
1205 DecodeStatus S = MCDisassembler::Success;
1207 Check(S, MCDisassembler::SoftFail);
1208 // The check above will cause the warning for the "potentially undefined
1209 // instruction encoding" but we can't build a bad MCOperand value here
1210 // with a lsb > msb or else printing the MCInst will cause a crash.
1214 uint32_t msb_mask = 0xFFFFFFFF;
1215 if (msb != 31) msb_mask = (1U << (msb+1)) - 1;
1216 uint32_t lsb_mask = (1U << lsb) - 1;
1218 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
1222 static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
1223 uint64_t Address, const void *Decoder) {
1224 DecodeStatus S = MCDisassembler::Success;
1226 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1227 unsigned CRd = fieldFromInstruction(Insn, 12, 4);
1228 unsigned coproc = fieldFromInstruction(Insn, 8, 4);
1229 unsigned imm = fieldFromInstruction(Insn, 0, 8);
1230 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1231 unsigned U = fieldFromInstruction(Insn, 23, 1);
1233 switch (Inst.getOpcode()) {
1234 case ARM::LDC_OFFSET:
1237 case ARM::LDC_OPTION:
1238 case ARM::LDCL_OFFSET:
1240 case ARM::LDCL_POST:
1241 case ARM::LDCL_OPTION:
1242 case ARM::STC_OFFSET:
1245 case ARM::STC_OPTION:
1246 case ARM::STCL_OFFSET:
1248 case ARM::STCL_POST:
1249 case ARM::STCL_OPTION:
1250 case ARM::t2LDC_OFFSET:
1251 case ARM::t2LDC_PRE:
1252 case ARM::t2LDC_POST:
1253 case ARM::t2LDC_OPTION:
1254 case ARM::t2LDCL_OFFSET:
1255 case ARM::t2LDCL_PRE:
1256 case ARM::t2LDCL_POST:
1257 case ARM::t2LDCL_OPTION:
1258 case ARM::t2STC_OFFSET:
1259 case ARM::t2STC_PRE:
1260 case ARM::t2STC_POST:
1261 case ARM::t2STC_OPTION:
1262 case ARM::t2STCL_OFFSET:
1263 case ARM::t2STCL_PRE:
1264 case ARM::t2STCL_POST:
1265 case ARM::t2STCL_OPTION:
1266 if (coproc == 0xA || coproc == 0xB)
1267 return MCDisassembler::Fail;
1273 Inst.addOperand(MCOperand::CreateImm(coproc));
1274 Inst.addOperand(MCOperand::CreateImm(CRd));
1275 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1276 return MCDisassembler::Fail;
1278 switch (Inst.getOpcode()) {
1279 case ARM::t2LDC2_OFFSET:
1280 case ARM::t2LDC2L_OFFSET:
1281 case ARM::t2LDC2_PRE:
1282 case ARM::t2LDC2L_PRE:
1283 case ARM::t2STC2_OFFSET:
1284 case ARM::t2STC2L_OFFSET:
1285 case ARM::t2STC2_PRE:
1286 case ARM::t2STC2L_PRE:
1287 case ARM::LDC2_OFFSET:
1288 case ARM::LDC2L_OFFSET:
1290 case ARM::LDC2L_PRE:
1291 case ARM::STC2_OFFSET:
1292 case ARM::STC2L_OFFSET:
1294 case ARM::STC2L_PRE:
1295 case ARM::t2LDC_OFFSET:
1296 case ARM::t2LDCL_OFFSET:
1297 case ARM::t2LDC_PRE:
1298 case ARM::t2LDCL_PRE:
1299 case ARM::t2STC_OFFSET:
1300 case ARM::t2STCL_OFFSET:
1301 case ARM::t2STC_PRE:
1302 case ARM::t2STCL_PRE:
1303 case ARM::LDC_OFFSET:
1304 case ARM::LDCL_OFFSET:
1307 case ARM::STC_OFFSET:
1308 case ARM::STCL_OFFSET:
1311 imm = ARM_AM::getAM5Opc(U ? ARM_AM::add : ARM_AM::sub, imm);
1312 Inst.addOperand(MCOperand::CreateImm(imm));
1314 case ARM::t2LDC2_POST:
1315 case ARM::t2LDC2L_POST:
1316 case ARM::t2STC2_POST:
1317 case ARM::t2STC2L_POST:
1318 case ARM::LDC2_POST:
1319 case ARM::LDC2L_POST:
1320 case ARM::STC2_POST:
1321 case ARM::STC2L_POST:
1322 case ARM::t2LDC_POST:
1323 case ARM::t2LDCL_POST:
1324 case ARM::t2STC_POST:
1325 case ARM::t2STCL_POST:
1327 case ARM::LDCL_POST:
1329 case ARM::STCL_POST:
1333 // The 'option' variant doesn't encode 'U' in the immediate since
1334 // the immediate is unsigned [0,255].
1335 Inst.addOperand(MCOperand::CreateImm(imm));
1339 switch (Inst.getOpcode()) {
1340 case ARM::LDC_OFFSET:
1343 case ARM::LDC_OPTION:
1344 case ARM::LDCL_OFFSET:
1346 case ARM::LDCL_POST:
1347 case ARM::LDCL_OPTION:
1348 case ARM::STC_OFFSET:
1351 case ARM::STC_OPTION:
1352 case ARM::STCL_OFFSET:
1354 case ARM::STCL_POST:
1355 case ARM::STCL_OPTION:
1356 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1357 return MCDisassembler::Fail;
1367 DecodeAddrMode2IdxInstruction(MCInst &Inst, unsigned Insn,
1368 uint64_t Address, const void *Decoder) {
1369 DecodeStatus S = MCDisassembler::Success;
1371 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1372 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1373 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1374 unsigned imm = fieldFromInstruction(Insn, 0, 12);
1375 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1376 unsigned reg = fieldFromInstruction(Insn, 25, 1);
1377 unsigned P = fieldFromInstruction(Insn, 24, 1);
1378 unsigned W = fieldFromInstruction(Insn, 21, 1);
1380 // On stores, the writeback operand precedes Rt.
1381 switch (Inst.getOpcode()) {
1382 case ARM::STR_POST_IMM:
1383 case ARM::STR_POST_REG:
1384 case ARM::STRB_POST_IMM:
1385 case ARM::STRB_POST_REG:
1386 case ARM::STRT_POST_REG:
1387 case ARM::STRT_POST_IMM:
1388 case ARM::STRBT_POST_REG:
1389 case ARM::STRBT_POST_IMM:
1390 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1391 return MCDisassembler::Fail;
1397 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1398 return MCDisassembler::Fail;
1400 // On loads, the writeback operand comes after Rt.
1401 switch (Inst.getOpcode()) {
1402 case ARM::LDR_POST_IMM:
1403 case ARM::LDR_POST_REG:
1404 case ARM::LDRB_POST_IMM:
1405 case ARM::LDRB_POST_REG:
1406 case ARM::LDRBT_POST_REG:
1407 case ARM::LDRBT_POST_IMM:
1408 case ARM::LDRT_POST_REG:
1409 case ARM::LDRT_POST_IMM:
1410 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1411 return MCDisassembler::Fail;
1417 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1418 return MCDisassembler::Fail;
1420 ARM_AM::AddrOpc Op = ARM_AM::add;
1421 if (!fieldFromInstruction(Insn, 23, 1))
1424 bool writeback = (P == 0) || (W == 1);
1425 unsigned idx_mode = 0;
1427 idx_mode = ARMII::IndexModePre;
1428 else if (!P && writeback)
1429 idx_mode = ARMII::IndexModePost;
1431 if (writeback && (Rn == 15 || Rn == Rt))
1432 S = MCDisassembler::SoftFail; // UNPREDICTABLE
1435 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1436 return MCDisassembler::Fail;
1437 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1438 switch( fieldFromInstruction(Insn, 5, 2)) {
1452 return MCDisassembler::Fail;
1454 unsigned amt = fieldFromInstruction(Insn, 7, 5);
1455 if (Opc == ARM_AM::ror && amt == 0)
1457 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1459 Inst.addOperand(MCOperand::CreateImm(imm));
1461 Inst.addOperand(MCOperand::CreateReg(0));
1462 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1463 Inst.addOperand(MCOperand::CreateImm(tmp));
1466 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1467 return MCDisassembler::Fail;
1472 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Val,
1473 uint64_t Address, const void *Decoder) {
1474 DecodeStatus S = MCDisassembler::Success;
1476 unsigned Rn = fieldFromInstruction(Val, 13, 4);
1477 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1478 unsigned type = fieldFromInstruction(Val, 5, 2);
1479 unsigned imm = fieldFromInstruction(Val, 7, 5);
1480 unsigned U = fieldFromInstruction(Val, 12, 1);
1482 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1498 if (ShOp == ARM_AM::ror && imm == 0)
1501 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1502 return MCDisassembler::Fail;
1503 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1504 return MCDisassembler::Fail;
1507 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1509 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1510 Inst.addOperand(MCOperand::CreateImm(shift));
1516 DecodeAddrMode3Instruction(MCInst &Inst, unsigned Insn,
1517 uint64_t Address, const void *Decoder) {
1518 DecodeStatus S = MCDisassembler::Success;
1520 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1521 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1522 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1523 unsigned type = fieldFromInstruction(Insn, 22, 1);
1524 unsigned imm = fieldFromInstruction(Insn, 8, 4);
1525 unsigned U = ((~fieldFromInstruction(Insn, 23, 1)) & 1) << 8;
1526 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1527 unsigned W = fieldFromInstruction(Insn, 21, 1);
1528 unsigned P = fieldFromInstruction(Insn, 24, 1);
1529 unsigned Rt2 = Rt + 1;
1531 bool writeback = (W == 1) | (P == 0);
1533 // For {LD,ST}RD, Rt must be even, else undefined.
1534 switch (Inst.getOpcode()) {
1537 case ARM::STRD_POST:
1540 case ARM::LDRD_POST:
1541 if (Rt & 0x1) S = MCDisassembler::SoftFail;
1546 switch (Inst.getOpcode()) {
1549 case ARM::STRD_POST:
1550 if (P == 0 && W == 1)
1551 S = MCDisassembler::SoftFail;
1553 if (writeback && (Rn == 15 || Rn == Rt || Rn == Rt2))
1554 S = MCDisassembler::SoftFail;
1555 if (type && Rm == 15)
1556 S = MCDisassembler::SoftFail;
1558 S = MCDisassembler::SoftFail;
1559 if (!type && fieldFromInstruction(Insn, 8, 4))
1560 S = MCDisassembler::SoftFail;
1564 case ARM::STRH_POST:
1566 S = MCDisassembler::SoftFail;
1567 if (writeback && (Rn == 15 || Rn == Rt))
1568 S = MCDisassembler::SoftFail;
1569 if (!type && Rm == 15)
1570 S = MCDisassembler::SoftFail;
1574 case ARM::LDRD_POST:
1575 if (type && Rn == 15){
1577 S = MCDisassembler::SoftFail;
1580 if (P == 0 && W == 1)
1581 S = MCDisassembler::SoftFail;
1582 if (!type && (Rt2 == 15 || Rm == 15 || Rm == Rt || Rm == Rt2))
1583 S = MCDisassembler::SoftFail;
1584 if (!type && writeback && Rn == 15)
1585 S = MCDisassembler::SoftFail;
1586 if (writeback && (Rn == Rt || Rn == Rt2))
1587 S = MCDisassembler::SoftFail;
1591 case ARM::LDRH_POST:
1592 if (type && Rn == 15){
1594 S = MCDisassembler::SoftFail;
1598 S = MCDisassembler::SoftFail;
1599 if (!type && Rm == 15)
1600 S = MCDisassembler::SoftFail;
1601 if (!type && writeback && (Rn == 15 || Rn == Rt))
1602 S = MCDisassembler::SoftFail;
1605 case ARM::LDRSH_PRE:
1606 case ARM::LDRSH_POST:
1608 case ARM::LDRSB_PRE:
1609 case ARM::LDRSB_POST:
1610 if (type && Rn == 15){
1612 S = MCDisassembler::SoftFail;
1615 if (type && (Rt == 15 || (writeback && Rn == Rt)))
1616 S = MCDisassembler::SoftFail;
1617 if (!type && (Rt == 15 || Rm == 15))
1618 S = MCDisassembler::SoftFail;
1619 if (!type && writeback && (Rn == 15 || Rn == Rt))
1620 S = MCDisassembler::SoftFail;
1626 if (writeback) { // Writeback
1628 U |= ARMII::IndexModePre << 9;
1630 U |= ARMII::IndexModePost << 9;
1632 // On stores, the writeback operand precedes Rt.
1633 switch (Inst.getOpcode()) {
1636 case ARM::STRD_POST:
1639 case ARM::STRH_POST:
1640 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1641 return MCDisassembler::Fail;
1648 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1649 return MCDisassembler::Fail;
1650 switch (Inst.getOpcode()) {
1653 case ARM::STRD_POST:
1656 case ARM::LDRD_POST:
1657 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
1658 return MCDisassembler::Fail;
1665 // On loads, the writeback operand comes after Rt.
1666 switch (Inst.getOpcode()) {
1669 case ARM::LDRD_POST:
1672 case ARM::LDRH_POST:
1674 case ARM::LDRSH_PRE:
1675 case ARM::LDRSH_POST:
1677 case ARM::LDRSB_PRE:
1678 case ARM::LDRSB_POST:
1681 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1682 return MCDisassembler::Fail;
1689 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1690 return MCDisassembler::Fail;
1693 Inst.addOperand(MCOperand::CreateReg(0));
1694 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1696 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1697 return MCDisassembler::Fail;
1698 Inst.addOperand(MCOperand::CreateImm(U));
1701 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1702 return MCDisassembler::Fail;
1707 static DecodeStatus DecodeRFEInstruction(MCInst &Inst, unsigned Insn,
1708 uint64_t Address, const void *Decoder) {
1709 DecodeStatus S = MCDisassembler::Success;
1711 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1712 unsigned mode = fieldFromInstruction(Insn, 23, 2);
1729 Inst.addOperand(MCOperand::CreateImm(mode));
1730 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1731 return MCDisassembler::Fail;
1736 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst &Inst,
1738 uint64_t Address, const void *Decoder) {
1739 DecodeStatus S = MCDisassembler::Success;
1741 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1742 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1743 unsigned reglist = fieldFromInstruction(Insn, 0, 16);
1746 switch (Inst.getOpcode()) {
1748 Inst.setOpcode(ARM::RFEDA);
1750 case ARM::LDMDA_UPD:
1751 Inst.setOpcode(ARM::RFEDA_UPD);
1754 Inst.setOpcode(ARM::RFEDB);
1756 case ARM::LDMDB_UPD:
1757 Inst.setOpcode(ARM::RFEDB_UPD);
1760 Inst.setOpcode(ARM::RFEIA);
1762 case ARM::LDMIA_UPD:
1763 Inst.setOpcode(ARM::RFEIA_UPD);
1766 Inst.setOpcode(ARM::RFEIB);
1768 case ARM::LDMIB_UPD:
1769 Inst.setOpcode(ARM::RFEIB_UPD);
1772 Inst.setOpcode(ARM::SRSDA);
1774 case ARM::STMDA_UPD:
1775 Inst.setOpcode(ARM::SRSDA_UPD);
1778 Inst.setOpcode(ARM::SRSDB);
1780 case ARM::STMDB_UPD:
1781 Inst.setOpcode(ARM::SRSDB_UPD);
1784 Inst.setOpcode(ARM::SRSIA);
1786 case ARM::STMIA_UPD:
1787 Inst.setOpcode(ARM::SRSIA_UPD);
1790 Inst.setOpcode(ARM::SRSIB);
1792 case ARM::STMIB_UPD:
1793 Inst.setOpcode(ARM::SRSIB_UPD);
1796 if (!Check(S, MCDisassembler::Fail)) return MCDisassembler::Fail;
1799 // For stores (which become SRS's, the only operand is the mode.
1800 if (fieldFromInstruction(Insn, 20, 1) == 0) {
1802 MCOperand::CreateImm(fieldFromInstruction(Insn, 0, 4)));
1806 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1809 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1810 return MCDisassembler::Fail;
1811 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1812 return MCDisassembler::Fail; // Tied
1813 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1814 return MCDisassembler::Fail;
1815 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
1816 return MCDisassembler::Fail;
1821 static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
1822 uint64_t Address, const void *Decoder) {
1823 unsigned imod = fieldFromInstruction(Insn, 18, 2);
1824 unsigned M = fieldFromInstruction(Insn, 17, 1);
1825 unsigned iflags = fieldFromInstruction(Insn, 6, 3);
1826 unsigned mode = fieldFromInstruction(Insn, 0, 5);
1828 DecodeStatus S = MCDisassembler::Success;
1830 // imod == '01' --> UNPREDICTABLE
1831 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1832 // return failure here. The '01' imod value is unprintable, so there's
1833 // nothing useful we could do even if we returned UNPREDICTABLE.
1835 if (imod == 1) return MCDisassembler::Fail;
1838 Inst.setOpcode(ARM::CPS3p);
1839 Inst.addOperand(MCOperand::CreateImm(imod));
1840 Inst.addOperand(MCOperand::CreateImm(iflags));
1841 Inst.addOperand(MCOperand::CreateImm(mode));
1842 } else if (imod && !M) {
1843 Inst.setOpcode(ARM::CPS2p);
1844 Inst.addOperand(MCOperand::CreateImm(imod));
1845 Inst.addOperand(MCOperand::CreateImm(iflags));
1846 if (mode) S = MCDisassembler::SoftFail;
1847 } else if (!imod && M) {
1848 Inst.setOpcode(ARM::CPS1p);
1849 Inst.addOperand(MCOperand::CreateImm(mode));
1850 if (iflags) S = MCDisassembler::SoftFail;
1852 // imod == '00' && M == '0' --> UNPREDICTABLE
1853 Inst.setOpcode(ARM::CPS1p);
1854 Inst.addOperand(MCOperand::CreateImm(mode));
1855 S = MCDisassembler::SoftFail;
1861 static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
1862 uint64_t Address, const void *Decoder) {
1863 unsigned imod = fieldFromInstruction(Insn, 9, 2);
1864 unsigned M = fieldFromInstruction(Insn, 8, 1);
1865 unsigned iflags = fieldFromInstruction(Insn, 5, 3);
1866 unsigned mode = fieldFromInstruction(Insn, 0, 5);
1868 DecodeStatus S = MCDisassembler::Success;
1870 // imod == '01' --> UNPREDICTABLE
1871 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1872 // return failure here. The '01' imod value is unprintable, so there's
1873 // nothing useful we could do even if we returned UNPREDICTABLE.
1875 if (imod == 1) return MCDisassembler::Fail;
1878 Inst.setOpcode(ARM::t2CPS3p);
1879 Inst.addOperand(MCOperand::CreateImm(imod));
1880 Inst.addOperand(MCOperand::CreateImm(iflags));
1881 Inst.addOperand(MCOperand::CreateImm(mode));
1882 } else if (imod && !M) {
1883 Inst.setOpcode(ARM::t2CPS2p);
1884 Inst.addOperand(MCOperand::CreateImm(imod));
1885 Inst.addOperand(MCOperand::CreateImm(iflags));
1886 if (mode) S = MCDisassembler::SoftFail;
1887 } else if (!imod && M) {
1888 Inst.setOpcode(ARM::t2CPS1p);
1889 Inst.addOperand(MCOperand::CreateImm(mode));
1890 if (iflags) S = MCDisassembler::SoftFail;
1892 // imod == '00' && M == '0' --> this is a HINT instruction
1893 int imm = fieldFromInstruction(Insn, 0, 8);
1894 // HINT are defined only for immediate in [0..4]
1895 if(imm > 4) return MCDisassembler::Fail;
1896 Inst.setOpcode(ARM::t2HINT);
1897 Inst.addOperand(MCOperand::CreateImm(imm));
1903 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
1904 uint64_t Address, const void *Decoder) {
1905 DecodeStatus S = MCDisassembler::Success;
1907 unsigned Rd = fieldFromInstruction(Insn, 8, 4);
1910 imm |= (fieldFromInstruction(Insn, 0, 8) << 0);
1911 imm |= (fieldFromInstruction(Insn, 12, 3) << 8);
1912 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
1913 imm |= (fieldFromInstruction(Insn, 26, 1) << 11);
1915 if (Inst.getOpcode() == ARM::t2MOVTi16)
1916 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1917 return MCDisassembler::Fail;
1918 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1919 return MCDisassembler::Fail;
1921 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
1922 Inst.addOperand(MCOperand::CreateImm(imm));
1927 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
1928 uint64_t Address, const void *Decoder) {
1929 DecodeStatus S = MCDisassembler::Success;
1931 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
1932 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1935 imm |= (fieldFromInstruction(Insn, 0, 12) << 0);
1936 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
1938 if (Inst.getOpcode() == ARM::MOVTi16)
1939 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1940 return MCDisassembler::Fail;
1942 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1943 return MCDisassembler::Fail;
1945 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
1946 Inst.addOperand(MCOperand::CreateImm(imm));
1948 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1949 return MCDisassembler::Fail;
1954 static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
1955 uint64_t Address, const void *Decoder) {
1956 DecodeStatus S = MCDisassembler::Success;
1958 unsigned Rd = fieldFromInstruction(Insn, 16, 4);
1959 unsigned Rn = fieldFromInstruction(Insn, 0, 4);
1960 unsigned Rm = fieldFromInstruction(Insn, 8, 4);
1961 unsigned Ra = fieldFromInstruction(Insn, 12, 4);
1962 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1965 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
1967 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1968 return MCDisassembler::Fail;
1969 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
1970 return MCDisassembler::Fail;
1971 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1972 return MCDisassembler::Fail;
1973 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
1974 return MCDisassembler::Fail;
1976 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1977 return MCDisassembler::Fail;
1982 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
1983 uint64_t Address, const void *Decoder) {
1984 DecodeStatus S = MCDisassembler::Success;
1986 unsigned add = fieldFromInstruction(Val, 12, 1);
1987 unsigned imm = fieldFromInstruction(Val, 0, 12);
1988 unsigned Rn = fieldFromInstruction(Val, 13, 4);
1990 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1991 return MCDisassembler::Fail;
1993 if (!add) imm *= -1;
1994 if (imm == 0 && !add) imm = INT32_MIN;
1995 Inst.addOperand(MCOperand::CreateImm(imm));
1997 tryAddingPcLoadReferenceComment(Address, Address + imm + 8, Decoder);
2002 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
2003 uint64_t Address, const void *Decoder) {
2004 DecodeStatus S = MCDisassembler::Success;
2006 unsigned Rn = fieldFromInstruction(Val, 9, 4);
2007 unsigned U = fieldFromInstruction(Val, 8, 1);
2008 unsigned imm = fieldFromInstruction(Val, 0, 8);
2010 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2011 return MCDisassembler::Fail;
2014 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
2016 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
2021 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
2022 uint64_t Address, const void *Decoder) {
2023 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
2027 DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
2028 uint64_t Address, const void *Decoder) {
2029 DecodeStatus Status = MCDisassembler::Success;
2031 // Note the J1 and J2 values are from the encoded instruction. So here
2032 // change them to I1 and I2 values via as documented:
2033 // I1 = NOT(J1 EOR S);
2034 // I2 = NOT(J2 EOR S);
2035 // and build the imm32 with one trailing zero as documented:
2036 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
2037 unsigned S = fieldFromInstruction(Insn, 26, 1);
2038 unsigned J1 = fieldFromInstruction(Insn, 13, 1);
2039 unsigned J2 = fieldFromInstruction(Insn, 11, 1);
2040 unsigned I1 = !(J1 ^ S);
2041 unsigned I2 = !(J2 ^ S);
2042 unsigned imm10 = fieldFromInstruction(Insn, 16, 10);
2043 unsigned imm11 = fieldFromInstruction(Insn, 0, 11);
2044 unsigned tmp = (S << 23) | (I1 << 22) | (I2 << 21) | (imm10 << 11) | imm11;
2045 int imm32 = SignExtend32<24>(tmp << 1);
2046 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
2047 true, 4, Inst, Decoder))
2048 Inst.addOperand(MCOperand::CreateImm(imm32));
2054 DecodeBranchImmInstruction(MCInst &Inst, unsigned Insn,
2055 uint64_t Address, const void *Decoder) {
2056 DecodeStatus S = MCDisassembler::Success;
2058 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2059 unsigned imm = fieldFromInstruction(Insn, 0, 24) << 2;
2062 Inst.setOpcode(ARM::BLXi);
2063 imm |= fieldFromInstruction(Insn, 24, 1) << 1;
2064 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2065 true, 4, Inst, Decoder))
2066 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2070 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2071 true, 4, Inst, Decoder))
2072 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2073 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2074 return MCDisassembler::Fail;
2080 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
2081 uint64_t Address, const void *Decoder) {
2082 DecodeStatus S = MCDisassembler::Success;
2084 unsigned Rm = fieldFromInstruction(Val, 0, 4);
2085 unsigned align = fieldFromInstruction(Val, 4, 2);
2087 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2088 return MCDisassembler::Fail;
2090 Inst.addOperand(MCOperand::CreateImm(0));
2092 Inst.addOperand(MCOperand::CreateImm(4 << align));
2097 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Insn,
2098 uint64_t Address, const void *Decoder) {
2099 DecodeStatus S = MCDisassembler::Success;
2101 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2102 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2103 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2104 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2105 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2106 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2108 // First output register
2109 switch (Inst.getOpcode()) {
2110 case ARM::VLD1q16: case ARM::VLD1q32: case ARM::VLD1q64: case ARM::VLD1q8:
2111 case ARM::VLD1q16wb_fixed: case ARM::VLD1q16wb_register:
2112 case ARM::VLD1q32wb_fixed: case ARM::VLD1q32wb_register:
2113 case ARM::VLD1q64wb_fixed: case ARM::VLD1q64wb_register:
2114 case ARM::VLD1q8wb_fixed: case ARM::VLD1q8wb_register:
2115 case ARM::VLD2d16: case ARM::VLD2d32: case ARM::VLD2d8:
2116 case ARM::VLD2d16wb_fixed: case ARM::VLD2d16wb_register:
2117 case ARM::VLD2d32wb_fixed: case ARM::VLD2d32wb_register:
2118 case ARM::VLD2d8wb_fixed: case ARM::VLD2d8wb_register:
2119 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2120 return MCDisassembler::Fail;
2125 case ARM::VLD2b16wb_fixed:
2126 case ARM::VLD2b16wb_register:
2127 case ARM::VLD2b32wb_fixed:
2128 case ARM::VLD2b32wb_register:
2129 case ARM::VLD2b8wb_fixed:
2130 case ARM::VLD2b8wb_register:
2131 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2132 return MCDisassembler::Fail;
2135 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2136 return MCDisassembler::Fail;
2139 // Second output register
2140 switch (Inst.getOpcode()) {
2144 case ARM::VLD3d8_UPD:
2145 case ARM::VLD3d16_UPD:
2146 case ARM::VLD3d32_UPD:
2150 case ARM::VLD4d8_UPD:
2151 case ARM::VLD4d16_UPD:
2152 case ARM::VLD4d32_UPD:
2153 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2154 return MCDisassembler::Fail;
2159 case ARM::VLD3q8_UPD:
2160 case ARM::VLD3q16_UPD:
2161 case ARM::VLD3q32_UPD:
2165 case ARM::VLD4q8_UPD:
2166 case ARM::VLD4q16_UPD:
2167 case ARM::VLD4q32_UPD:
2168 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2169 return MCDisassembler::Fail;
2174 // Third output register
2175 switch(Inst.getOpcode()) {
2179 case ARM::VLD3d8_UPD:
2180 case ARM::VLD3d16_UPD:
2181 case ARM::VLD3d32_UPD:
2185 case ARM::VLD4d8_UPD:
2186 case ARM::VLD4d16_UPD:
2187 case ARM::VLD4d32_UPD:
2188 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2189 return MCDisassembler::Fail;
2194 case ARM::VLD3q8_UPD:
2195 case ARM::VLD3q16_UPD:
2196 case ARM::VLD3q32_UPD:
2200 case ARM::VLD4q8_UPD:
2201 case ARM::VLD4q16_UPD:
2202 case ARM::VLD4q32_UPD:
2203 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2204 return MCDisassembler::Fail;
2210 // Fourth output register
2211 switch (Inst.getOpcode()) {
2215 case ARM::VLD4d8_UPD:
2216 case ARM::VLD4d16_UPD:
2217 case ARM::VLD4d32_UPD:
2218 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2219 return MCDisassembler::Fail;
2224 case ARM::VLD4q8_UPD:
2225 case ARM::VLD4q16_UPD:
2226 case ARM::VLD4q32_UPD:
2227 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2228 return MCDisassembler::Fail;
2234 // Writeback operand
2235 switch (Inst.getOpcode()) {
2236 case ARM::VLD1d8wb_fixed:
2237 case ARM::VLD1d16wb_fixed:
2238 case ARM::VLD1d32wb_fixed:
2239 case ARM::VLD1d64wb_fixed:
2240 case ARM::VLD1d8wb_register:
2241 case ARM::VLD1d16wb_register:
2242 case ARM::VLD1d32wb_register:
2243 case ARM::VLD1d64wb_register:
2244 case ARM::VLD1q8wb_fixed:
2245 case ARM::VLD1q16wb_fixed:
2246 case ARM::VLD1q32wb_fixed:
2247 case ARM::VLD1q64wb_fixed:
2248 case ARM::VLD1q8wb_register:
2249 case ARM::VLD1q16wb_register:
2250 case ARM::VLD1q32wb_register:
2251 case ARM::VLD1q64wb_register:
2252 case ARM::VLD1d8Twb_fixed:
2253 case ARM::VLD1d8Twb_register:
2254 case ARM::VLD1d16Twb_fixed:
2255 case ARM::VLD1d16Twb_register:
2256 case ARM::VLD1d32Twb_fixed:
2257 case ARM::VLD1d32Twb_register:
2258 case ARM::VLD1d64Twb_fixed:
2259 case ARM::VLD1d64Twb_register:
2260 case ARM::VLD1d8Qwb_fixed:
2261 case ARM::VLD1d8Qwb_register:
2262 case ARM::VLD1d16Qwb_fixed:
2263 case ARM::VLD1d16Qwb_register:
2264 case ARM::VLD1d32Qwb_fixed:
2265 case ARM::VLD1d32Qwb_register:
2266 case ARM::VLD1d64Qwb_fixed:
2267 case ARM::VLD1d64Qwb_register:
2268 case ARM::VLD2d8wb_fixed:
2269 case ARM::VLD2d16wb_fixed:
2270 case ARM::VLD2d32wb_fixed:
2271 case ARM::VLD2q8wb_fixed:
2272 case ARM::VLD2q16wb_fixed:
2273 case ARM::VLD2q32wb_fixed:
2274 case ARM::VLD2d8wb_register:
2275 case ARM::VLD2d16wb_register:
2276 case ARM::VLD2d32wb_register:
2277 case ARM::VLD2q8wb_register:
2278 case ARM::VLD2q16wb_register:
2279 case ARM::VLD2q32wb_register:
2280 case ARM::VLD2b8wb_fixed:
2281 case ARM::VLD2b16wb_fixed:
2282 case ARM::VLD2b32wb_fixed:
2283 case ARM::VLD2b8wb_register:
2284 case ARM::VLD2b16wb_register:
2285 case ARM::VLD2b32wb_register:
2286 Inst.addOperand(MCOperand::CreateImm(0));
2288 case ARM::VLD3d8_UPD:
2289 case ARM::VLD3d16_UPD:
2290 case ARM::VLD3d32_UPD:
2291 case ARM::VLD3q8_UPD:
2292 case ARM::VLD3q16_UPD:
2293 case ARM::VLD3q32_UPD:
2294 case ARM::VLD4d8_UPD:
2295 case ARM::VLD4d16_UPD:
2296 case ARM::VLD4d32_UPD:
2297 case ARM::VLD4q8_UPD:
2298 case ARM::VLD4q16_UPD:
2299 case ARM::VLD4q32_UPD:
2300 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2301 return MCDisassembler::Fail;
2307 // AddrMode6 Base (register+alignment)
2308 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2309 return MCDisassembler::Fail;
2311 // AddrMode6 Offset (register)
2312 switch (Inst.getOpcode()) {
2314 // The below have been updated to have explicit am6offset split
2315 // between fixed and register offset. For those instructions not
2316 // yet updated, we need to add an additional reg0 operand for the
2319 // The fixed offset encodes as Rm == 0xd, so we check for that.
2321 Inst.addOperand(MCOperand::CreateReg(0));
2324 // Fall through to handle the register offset variant.
2325 case ARM::VLD1d8wb_fixed:
2326 case ARM::VLD1d16wb_fixed:
2327 case ARM::VLD1d32wb_fixed:
2328 case ARM::VLD1d64wb_fixed:
2329 case ARM::VLD1d8Twb_fixed:
2330 case ARM::VLD1d16Twb_fixed:
2331 case ARM::VLD1d32Twb_fixed:
2332 case ARM::VLD1d64Twb_fixed:
2333 case ARM::VLD1d8Qwb_fixed:
2334 case ARM::VLD1d16Qwb_fixed:
2335 case ARM::VLD1d32Qwb_fixed:
2336 case ARM::VLD1d64Qwb_fixed:
2337 case ARM::VLD1d8wb_register:
2338 case ARM::VLD1d16wb_register:
2339 case ARM::VLD1d32wb_register:
2340 case ARM::VLD1d64wb_register:
2341 case ARM::VLD1q8wb_fixed:
2342 case ARM::VLD1q16wb_fixed:
2343 case ARM::VLD1q32wb_fixed:
2344 case ARM::VLD1q64wb_fixed:
2345 case ARM::VLD1q8wb_register:
2346 case ARM::VLD1q16wb_register:
2347 case ARM::VLD1q32wb_register:
2348 case ARM::VLD1q64wb_register:
2349 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2350 // variant encodes Rm == 0xf. Anything else is a register offset post-
2351 // increment and we need to add the register operand to the instruction.
2352 if (Rm != 0xD && Rm != 0xF &&
2353 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2354 return MCDisassembler::Fail;
2356 case ARM::VLD2d8wb_fixed:
2357 case ARM::VLD2d16wb_fixed:
2358 case ARM::VLD2d32wb_fixed:
2359 case ARM::VLD2b8wb_fixed:
2360 case ARM::VLD2b16wb_fixed:
2361 case ARM::VLD2b32wb_fixed:
2362 case ARM::VLD2q8wb_fixed:
2363 case ARM::VLD2q16wb_fixed:
2364 case ARM::VLD2q32wb_fixed:
2371 static DecodeStatus DecodeVST1Instruction(MCInst& Inst, unsigned Insn,
2372 uint64_t Addr, const void* Decoder) {
2373 unsigned type = fieldFromInstruction(Insn, 8, 4);
2374 unsigned align = fieldFromInstruction(Insn, 4, 2);
2375 if(type == 7 && (align & 2)) return MCDisassembler::Fail;
2376 if(type == 10 && align == 3) return MCDisassembler::Fail;
2377 if(type == 6 && (align & 2)) return MCDisassembler::Fail;
2379 return DecodeVSTInstruction(Inst, Insn, Addr, Decoder);
2382 static DecodeStatus DecodeVST2Instruction(MCInst& Inst, unsigned Insn,
2383 uint64_t Addr, const void* Decoder) {
2384 unsigned size = fieldFromInstruction(Insn, 6, 2);
2385 if(size == 3) return MCDisassembler::Fail;
2387 unsigned type = fieldFromInstruction(Insn, 8, 4);
2388 unsigned align = fieldFromInstruction(Insn, 4, 2);
2389 if(type == 8 && align == 3) return MCDisassembler::Fail;
2390 if(type == 9 && align == 3) return MCDisassembler::Fail;
2392 return DecodeVSTInstruction(Inst, Insn, Addr, Decoder);
2395 static DecodeStatus DecodeVST3Instruction(MCInst& Inst, unsigned Insn,
2396 uint64_t Addr, const void* Decoder) {
2397 unsigned size = fieldFromInstruction(Insn, 6, 2);
2398 if(size == 3) return MCDisassembler::Fail;
2400 unsigned align = fieldFromInstruction(Insn, 4, 2);
2401 if(align & 2) return MCDisassembler::Fail;
2403 return DecodeVSTInstruction(Inst, Insn, Addr, Decoder);
2406 static DecodeStatus DecodeVST4Instruction(MCInst& Inst, unsigned Insn,
2407 uint64_t Addr, const void* Decoder) {
2408 unsigned size = fieldFromInstruction(Insn, 6, 2);
2409 if(size == 3) return MCDisassembler::Fail;
2411 return DecodeVSTInstruction(Inst, Insn, Addr, Decoder);
2414 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Insn,
2415 uint64_t Address, const void *Decoder) {
2416 DecodeStatus S = MCDisassembler::Success;
2418 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2419 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2420 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2421 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2422 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2423 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2425 // Writeback Operand
2426 switch (Inst.getOpcode()) {
2427 case ARM::VST1d8wb_fixed:
2428 case ARM::VST1d16wb_fixed:
2429 case ARM::VST1d32wb_fixed:
2430 case ARM::VST1d64wb_fixed:
2431 case ARM::VST1d8wb_register:
2432 case ARM::VST1d16wb_register:
2433 case ARM::VST1d32wb_register:
2434 case ARM::VST1d64wb_register:
2435 case ARM::VST1q8wb_fixed:
2436 case ARM::VST1q16wb_fixed:
2437 case ARM::VST1q32wb_fixed:
2438 case ARM::VST1q64wb_fixed:
2439 case ARM::VST1q8wb_register:
2440 case ARM::VST1q16wb_register:
2441 case ARM::VST1q32wb_register:
2442 case ARM::VST1q64wb_register:
2443 case ARM::VST1d8Twb_fixed:
2444 case ARM::VST1d16Twb_fixed:
2445 case ARM::VST1d32Twb_fixed:
2446 case ARM::VST1d64Twb_fixed:
2447 case ARM::VST1d8Twb_register:
2448 case ARM::VST1d16Twb_register:
2449 case ARM::VST1d32Twb_register:
2450 case ARM::VST1d64Twb_register:
2451 case ARM::VST1d8Qwb_fixed:
2452 case ARM::VST1d16Qwb_fixed:
2453 case ARM::VST1d32Qwb_fixed:
2454 case ARM::VST1d64Qwb_fixed:
2455 case ARM::VST1d8Qwb_register:
2456 case ARM::VST1d16Qwb_register:
2457 case ARM::VST1d32Qwb_register:
2458 case ARM::VST1d64Qwb_register:
2459 case ARM::VST2d8wb_fixed:
2460 case ARM::VST2d16wb_fixed:
2461 case ARM::VST2d32wb_fixed:
2462 case ARM::VST2d8wb_register:
2463 case ARM::VST2d16wb_register:
2464 case ARM::VST2d32wb_register:
2465 case ARM::VST2q8wb_fixed:
2466 case ARM::VST2q16wb_fixed:
2467 case ARM::VST2q32wb_fixed:
2468 case ARM::VST2q8wb_register:
2469 case ARM::VST2q16wb_register:
2470 case ARM::VST2q32wb_register:
2471 case ARM::VST2b8wb_fixed:
2472 case ARM::VST2b16wb_fixed:
2473 case ARM::VST2b32wb_fixed:
2474 case ARM::VST2b8wb_register:
2475 case ARM::VST2b16wb_register:
2476 case ARM::VST2b32wb_register:
2478 return MCDisassembler::Fail;
2479 Inst.addOperand(MCOperand::CreateImm(0));
2481 case ARM::VST3d8_UPD:
2482 case ARM::VST3d16_UPD:
2483 case ARM::VST3d32_UPD:
2484 case ARM::VST3q8_UPD:
2485 case ARM::VST3q16_UPD:
2486 case ARM::VST3q32_UPD:
2487 case ARM::VST4d8_UPD:
2488 case ARM::VST4d16_UPD:
2489 case ARM::VST4d32_UPD:
2490 case ARM::VST4q8_UPD:
2491 case ARM::VST4q16_UPD:
2492 case ARM::VST4q32_UPD:
2493 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2494 return MCDisassembler::Fail;
2500 // AddrMode6 Base (register+alignment)
2501 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2502 return MCDisassembler::Fail;
2504 // AddrMode6 Offset (register)
2505 switch (Inst.getOpcode()) {
2508 Inst.addOperand(MCOperand::CreateReg(0));
2509 else if (Rm != 0xF) {
2510 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2511 return MCDisassembler::Fail;
2514 case ARM::VST1d8wb_fixed:
2515 case ARM::VST1d16wb_fixed:
2516 case ARM::VST1d32wb_fixed:
2517 case ARM::VST1d64wb_fixed:
2518 case ARM::VST1q8wb_fixed:
2519 case ARM::VST1q16wb_fixed:
2520 case ARM::VST1q32wb_fixed:
2521 case ARM::VST1q64wb_fixed:
2522 case ARM::VST1d8Twb_fixed:
2523 case ARM::VST1d16Twb_fixed:
2524 case ARM::VST1d32Twb_fixed:
2525 case ARM::VST1d64Twb_fixed:
2526 case ARM::VST1d8Qwb_fixed:
2527 case ARM::VST1d16Qwb_fixed:
2528 case ARM::VST1d32Qwb_fixed:
2529 case ARM::VST1d64Qwb_fixed:
2530 case ARM::VST2d8wb_fixed:
2531 case ARM::VST2d16wb_fixed:
2532 case ARM::VST2d32wb_fixed:
2533 case ARM::VST2q8wb_fixed:
2534 case ARM::VST2q16wb_fixed:
2535 case ARM::VST2q32wb_fixed:
2536 case ARM::VST2b8wb_fixed:
2537 case ARM::VST2b16wb_fixed:
2538 case ARM::VST2b32wb_fixed:
2543 // First input register
2544 switch (Inst.getOpcode()) {
2549 case ARM::VST1q16wb_fixed:
2550 case ARM::VST1q16wb_register:
2551 case ARM::VST1q32wb_fixed:
2552 case ARM::VST1q32wb_register:
2553 case ARM::VST1q64wb_fixed:
2554 case ARM::VST1q64wb_register:
2555 case ARM::VST1q8wb_fixed:
2556 case ARM::VST1q8wb_register:
2560 case ARM::VST2d16wb_fixed:
2561 case ARM::VST2d16wb_register:
2562 case ARM::VST2d32wb_fixed:
2563 case ARM::VST2d32wb_register:
2564 case ARM::VST2d8wb_fixed:
2565 case ARM::VST2d8wb_register:
2566 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2567 return MCDisassembler::Fail;
2572 case ARM::VST2b16wb_fixed:
2573 case ARM::VST2b16wb_register:
2574 case ARM::VST2b32wb_fixed:
2575 case ARM::VST2b32wb_register:
2576 case ARM::VST2b8wb_fixed:
2577 case ARM::VST2b8wb_register:
2578 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2579 return MCDisassembler::Fail;
2582 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2583 return MCDisassembler::Fail;
2586 // Second input register
2587 switch (Inst.getOpcode()) {
2591 case ARM::VST3d8_UPD:
2592 case ARM::VST3d16_UPD:
2593 case ARM::VST3d32_UPD:
2597 case ARM::VST4d8_UPD:
2598 case ARM::VST4d16_UPD:
2599 case ARM::VST4d32_UPD:
2600 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2601 return MCDisassembler::Fail;
2606 case ARM::VST3q8_UPD:
2607 case ARM::VST3q16_UPD:
2608 case ARM::VST3q32_UPD:
2612 case ARM::VST4q8_UPD:
2613 case ARM::VST4q16_UPD:
2614 case ARM::VST4q32_UPD:
2615 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2616 return MCDisassembler::Fail;
2622 // Third input register
2623 switch (Inst.getOpcode()) {
2627 case ARM::VST3d8_UPD:
2628 case ARM::VST3d16_UPD:
2629 case ARM::VST3d32_UPD:
2633 case ARM::VST4d8_UPD:
2634 case ARM::VST4d16_UPD:
2635 case ARM::VST4d32_UPD:
2636 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2637 return MCDisassembler::Fail;
2642 case ARM::VST3q8_UPD:
2643 case ARM::VST3q16_UPD:
2644 case ARM::VST3q32_UPD:
2648 case ARM::VST4q8_UPD:
2649 case ARM::VST4q16_UPD:
2650 case ARM::VST4q32_UPD:
2651 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2652 return MCDisassembler::Fail;
2658 // Fourth input register
2659 switch (Inst.getOpcode()) {
2663 case ARM::VST4d8_UPD:
2664 case ARM::VST4d16_UPD:
2665 case ARM::VST4d32_UPD:
2666 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2667 return MCDisassembler::Fail;
2672 case ARM::VST4q8_UPD:
2673 case ARM::VST4q16_UPD:
2674 case ARM::VST4q32_UPD:
2675 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2676 return MCDisassembler::Fail;
2685 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Insn,
2686 uint64_t Address, const void *Decoder) {
2687 DecodeStatus S = MCDisassembler::Success;
2689 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2690 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2691 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2692 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2693 unsigned align = fieldFromInstruction(Insn, 4, 1);
2694 unsigned size = fieldFromInstruction(Insn, 6, 2);
2696 if (size == 0 && align == 1)
2697 return MCDisassembler::Fail;
2698 align *= (1 << size);
2700 switch (Inst.getOpcode()) {
2701 case ARM::VLD1DUPq16: case ARM::VLD1DUPq32: case ARM::VLD1DUPq8:
2702 case ARM::VLD1DUPq16wb_fixed: case ARM::VLD1DUPq16wb_register:
2703 case ARM::VLD1DUPq32wb_fixed: case ARM::VLD1DUPq32wb_register:
2704 case ARM::VLD1DUPq8wb_fixed: case ARM::VLD1DUPq8wb_register:
2705 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2706 return MCDisassembler::Fail;
2709 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2710 return MCDisassembler::Fail;
2714 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2715 return MCDisassembler::Fail;
2718 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2719 return MCDisassembler::Fail;
2720 Inst.addOperand(MCOperand::CreateImm(align));
2722 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2723 // variant encodes Rm == 0xf. Anything else is a register offset post-
2724 // increment and we need to add the register operand to the instruction.
2725 if (Rm != 0xD && Rm != 0xF &&
2726 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2727 return MCDisassembler::Fail;
2732 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Insn,
2733 uint64_t Address, const void *Decoder) {
2734 DecodeStatus S = MCDisassembler::Success;
2736 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2737 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2738 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2739 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2740 unsigned align = fieldFromInstruction(Insn, 4, 1);
2741 unsigned size = 1 << fieldFromInstruction(Insn, 6, 2);
2744 switch (Inst.getOpcode()) {
2745 case ARM::VLD2DUPd16: case ARM::VLD2DUPd32: case ARM::VLD2DUPd8:
2746 case ARM::VLD2DUPd16wb_fixed: case ARM::VLD2DUPd16wb_register:
2747 case ARM::VLD2DUPd32wb_fixed: case ARM::VLD2DUPd32wb_register:
2748 case ARM::VLD2DUPd8wb_fixed: case ARM::VLD2DUPd8wb_register:
2749 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2750 return MCDisassembler::Fail;
2752 case ARM::VLD2DUPd16x2: case ARM::VLD2DUPd32x2: case ARM::VLD2DUPd8x2:
2753 case ARM::VLD2DUPd16x2wb_fixed: case ARM::VLD2DUPd16x2wb_register:
2754 case ARM::VLD2DUPd32x2wb_fixed: case ARM::VLD2DUPd32x2wb_register:
2755 case ARM::VLD2DUPd8x2wb_fixed: case ARM::VLD2DUPd8x2wb_register:
2756 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2757 return MCDisassembler::Fail;
2760 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2761 return MCDisassembler::Fail;
2766 Inst.addOperand(MCOperand::CreateImm(0));
2768 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2769 return MCDisassembler::Fail;
2770 Inst.addOperand(MCOperand::CreateImm(align));
2772 if (Rm != 0xD && Rm != 0xF) {
2773 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2774 return MCDisassembler::Fail;
2780 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Insn,
2781 uint64_t Address, const void *Decoder) {
2782 DecodeStatus S = MCDisassembler::Success;
2784 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2785 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2786 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2787 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2788 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
2790 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2791 return MCDisassembler::Fail;
2792 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2793 return MCDisassembler::Fail;
2794 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2795 return MCDisassembler::Fail;
2797 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2798 return MCDisassembler::Fail;
2801 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2802 return MCDisassembler::Fail;
2803 Inst.addOperand(MCOperand::CreateImm(0));
2806 Inst.addOperand(MCOperand::CreateReg(0));
2807 else if (Rm != 0xF) {
2808 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2809 return MCDisassembler::Fail;
2815 static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Insn,
2816 uint64_t Address, const void *Decoder) {
2817 DecodeStatus S = MCDisassembler::Success;
2819 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2820 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2821 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2822 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2823 unsigned size = fieldFromInstruction(Insn, 6, 2);
2824 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
2825 unsigned align = fieldFromInstruction(Insn, 4, 1);
2829 return MCDisassembler::Fail;
2842 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2843 return MCDisassembler::Fail;
2844 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2845 return MCDisassembler::Fail;
2846 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2847 return MCDisassembler::Fail;
2848 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
2849 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));
2860 Inst.addOperand(MCOperand::CreateReg(0));
2861 else if (Rm != 0xF) {
2862 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2863 return MCDisassembler::Fail;
2870 DecodeNEONModImmInstruction(MCInst &Inst, unsigned Insn,
2871 uint64_t Address, const void *Decoder) {
2872 DecodeStatus S = MCDisassembler::Success;
2874 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2875 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2876 unsigned imm = fieldFromInstruction(Insn, 0, 4);
2877 imm |= fieldFromInstruction(Insn, 16, 3) << 4;
2878 imm |= fieldFromInstruction(Insn, 24, 1) << 7;
2879 imm |= fieldFromInstruction(Insn, 8, 4) << 8;
2880 imm |= fieldFromInstruction(Insn, 5, 1) << 12;
2881 unsigned Q = fieldFromInstruction(Insn, 6, 1);
2884 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2885 return MCDisassembler::Fail;
2887 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2888 return MCDisassembler::Fail;
2891 Inst.addOperand(MCOperand::CreateImm(imm));
2893 switch (Inst.getOpcode()) {
2894 case ARM::VORRiv4i16:
2895 case ARM::VORRiv2i32:
2896 case ARM::VBICiv4i16:
2897 case ARM::VBICiv2i32:
2898 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2899 return MCDisassembler::Fail;
2901 case ARM::VORRiv8i16:
2902 case ARM::VORRiv4i32:
2903 case ARM::VBICiv8i16:
2904 case ARM::VBICiv4i32:
2905 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2906 return MCDisassembler::Fail;
2915 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Insn,
2916 uint64_t Address, const void *Decoder) {
2917 DecodeStatus S = MCDisassembler::Success;
2919 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2920 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2921 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2922 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
2923 unsigned size = fieldFromInstruction(Insn, 18, 2);
2925 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2926 return MCDisassembler::Fail;
2927 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2928 return MCDisassembler::Fail;
2929 Inst.addOperand(MCOperand::CreateImm(8 << size));
2934 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
2935 uint64_t Address, const void *Decoder) {
2936 Inst.addOperand(MCOperand::CreateImm(8 - Val));
2937 return MCDisassembler::Success;
2940 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
2941 uint64_t Address, const void *Decoder) {
2942 Inst.addOperand(MCOperand::CreateImm(16 - Val));
2943 return MCDisassembler::Success;
2946 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
2947 uint64_t Address, const void *Decoder) {
2948 Inst.addOperand(MCOperand::CreateImm(32 - Val));
2949 return MCDisassembler::Success;
2952 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
2953 uint64_t Address, const void *Decoder) {
2954 Inst.addOperand(MCOperand::CreateImm(64 - Val));
2955 return MCDisassembler::Success;
2958 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
2959 uint64_t Address, const void *Decoder) {
2960 DecodeStatus S = MCDisassembler::Success;
2962 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2963 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2964 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2965 Rn |= fieldFromInstruction(Insn, 7, 1) << 4;
2966 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2967 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
2968 unsigned op = fieldFromInstruction(Insn, 6, 1);
2970 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2971 return MCDisassembler::Fail;
2973 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2974 return MCDisassembler::Fail; // Writeback
2977 switch (Inst.getOpcode()) {
2980 if (!Check(S, DecodeDPairRegisterClass(Inst, Rn, Address, Decoder)))
2981 return MCDisassembler::Fail;
2984 if (!Check(S, DecodeDPRRegisterClass(Inst, Rn, Address, Decoder)))
2985 return MCDisassembler::Fail;
2988 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2989 return MCDisassembler::Fail;
2994 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
2995 uint64_t Address, const void *Decoder) {
2996 DecodeStatus S = MCDisassembler::Success;
2998 unsigned dst = fieldFromInstruction(Insn, 8, 3);
2999 unsigned imm = fieldFromInstruction(Insn, 0, 8);
3001 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
3002 return MCDisassembler::Fail;
3004 switch(Inst.getOpcode()) {
3006 return MCDisassembler::Fail;
3008 break; // tADR does not explicitly represent the PC as an operand.
3010 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3014 Inst.addOperand(MCOperand::CreateImm(imm));
3018 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
3019 uint64_t Address, const void *Decoder) {
3020 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<12>(Val<<1) + 4,
3021 true, 2, Inst, Decoder))
3022 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
3023 return MCDisassembler::Success;
3026 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
3027 uint64_t Address, const void *Decoder) {
3028 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<21>(Val) + 4,
3029 true, 4, Inst, Decoder))
3030 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
3031 return MCDisassembler::Success;
3034 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
3035 uint64_t Address, const void *Decoder) {
3036 if (!tryAddingSymbolicOperand(Address, Address + (Val<<1) + 4,
3037 true, 2, Inst, Decoder))
3038 Inst.addOperand(MCOperand::CreateImm(Val << 1));
3039 return MCDisassembler::Success;
3042 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
3043 uint64_t Address, const void *Decoder) {
3044 DecodeStatus S = MCDisassembler::Success;
3046 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3047 unsigned Rm = fieldFromInstruction(Val, 3, 3);
3049 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3050 return MCDisassembler::Fail;
3051 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
3052 return MCDisassembler::Fail;
3057 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
3058 uint64_t Address, const void *Decoder) {
3059 DecodeStatus S = MCDisassembler::Success;
3061 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3062 unsigned imm = fieldFromInstruction(Val, 3, 5);
3064 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3065 return MCDisassembler::Fail;
3066 Inst.addOperand(MCOperand::CreateImm(imm));
3071 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
3072 uint64_t Address, const void *Decoder) {
3073 unsigned imm = Val << 2;
3075 Inst.addOperand(MCOperand::CreateImm(imm));
3076 tryAddingPcLoadReferenceComment(Address, (Address & ~2u) + imm + 4, Decoder);
3078 return MCDisassembler::Success;
3081 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
3082 uint64_t Address, const void *Decoder) {
3083 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3084 Inst.addOperand(MCOperand::CreateImm(Val));
3086 return MCDisassembler::Success;
3089 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
3090 uint64_t Address, const void *Decoder) {
3091 DecodeStatus S = MCDisassembler::Success;
3093 unsigned Rn = fieldFromInstruction(Val, 6, 4);
3094 unsigned Rm = fieldFromInstruction(Val, 2, 4);
3095 unsigned imm = fieldFromInstruction(Val, 0, 2);
3097 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3098 return MCDisassembler::Fail;
3099 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3100 return MCDisassembler::Fail;
3101 Inst.addOperand(MCOperand::CreateImm(imm));
3106 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Insn,
3107 uint64_t Address, const void *Decoder) {
3108 DecodeStatus S = MCDisassembler::Success;
3110 switch (Inst.getOpcode()) {
3116 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3117 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3118 return MCDisassembler::Fail;
3122 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3124 switch (Inst.getOpcode()) {
3126 Inst.setOpcode(ARM::t2LDRBpci);
3129 Inst.setOpcode(ARM::t2LDRHpci);
3132 Inst.setOpcode(ARM::t2LDRSHpci);
3135 Inst.setOpcode(ARM::t2LDRSBpci);
3138 Inst.setOpcode(ARM::t2PLDi12);
3139 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
3142 return MCDisassembler::Fail;
3145 int imm = fieldFromInstruction(Insn, 0, 12);
3146 if (!fieldFromInstruction(Insn, 23, 1)) imm *= -1;
3147 Inst.addOperand(MCOperand::CreateImm(imm));
3152 unsigned addrmode = fieldFromInstruction(Insn, 4, 2);
3153 addrmode |= fieldFromInstruction(Insn, 0, 4) << 2;
3154 addrmode |= fieldFromInstruction(Insn, 16, 4) << 6;
3155 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
3156 return MCDisassembler::Fail;
3161 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
3162 uint64_t Address, const void *Decoder) {
3164 Inst.addOperand(MCOperand::CreateImm(INT32_MIN));
3166 int imm = Val & 0xFF;
3168 if (!(Val & 0x100)) imm *= -1;
3169 Inst.addOperand(MCOperand::CreateImm(imm * 4));
3172 return MCDisassembler::Success;
3175 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
3176 uint64_t Address, const void *Decoder) {
3177 DecodeStatus S = MCDisassembler::Success;
3179 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3180 unsigned imm = fieldFromInstruction(Val, 0, 9);
3182 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3183 return MCDisassembler::Fail;
3184 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
3185 return MCDisassembler::Fail;
3190 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
3191 uint64_t Address, const void *Decoder) {
3192 DecodeStatus S = MCDisassembler::Success;
3194 unsigned Rn = fieldFromInstruction(Val, 8, 4);
3195 unsigned imm = fieldFromInstruction(Val, 0, 8);
3197 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
3198 return MCDisassembler::Fail;
3200 Inst.addOperand(MCOperand::CreateImm(imm));
3205 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
3206 uint64_t Address, const void *Decoder) {
3207 int imm = Val & 0xFF;
3210 else if (!(Val & 0x100))
3212 Inst.addOperand(MCOperand::CreateImm(imm));
3214 return MCDisassembler::Success;
3218 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
3219 uint64_t Address, const void *Decoder) {
3220 DecodeStatus S = MCDisassembler::Success;
3222 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3223 unsigned imm = fieldFromInstruction(Val, 0, 9);
3225 // Some instructions always use an additive offset.
3226 switch (Inst.getOpcode()) {
3241 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3242 return MCDisassembler::Fail;
3243 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
3244 return MCDisassembler::Fail;
3249 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Insn,
3250 uint64_t Address, const void *Decoder) {
3251 DecodeStatus S = MCDisassembler::Success;
3253 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3254 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3255 unsigned addr = fieldFromInstruction(Insn, 0, 8);
3256 addr |= fieldFromInstruction(Insn, 9, 1) << 8;
3258 unsigned load = fieldFromInstruction(Insn, 20, 1);
3261 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3262 return MCDisassembler::Fail;
3265 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3266 return MCDisassembler::Fail;
3269 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3270 return MCDisassembler::Fail;
3273 if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
3274 return MCDisassembler::Fail;
3279 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
3280 uint64_t Address, const void *Decoder) {
3281 DecodeStatus S = MCDisassembler::Success;
3283 unsigned Rn = fieldFromInstruction(Val, 13, 4);
3284 unsigned imm = fieldFromInstruction(Val, 0, 12);
3286 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3287 return MCDisassembler::Fail;
3288 Inst.addOperand(MCOperand::CreateImm(imm));
3294 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Insn,
3295 uint64_t Address, const void *Decoder) {
3296 unsigned imm = fieldFromInstruction(Insn, 0, 7);
3298 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3299 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3300 Inst.addOperand(MCOperand::CreateImm(imm));
3302 return MCDisassembler::Success;
3305 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
3306 uint64_t Address, const void *Decoder) {
3307 DecodeStatus S = MCDisassembler::Success;
3309 if (Inst.getOpcode() == ARM::tADDrSP) {
3310 unsigned Rdm = fieldFromInstruction(Insn, 0, 3);
3311 Rdm |= fieldFromInstruction(Insn, 7, 1) << 3;
3313 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3314 return MCDisassembler::Fail;
3315 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3316 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3317 return MCDisassembler::Fail;
3318 } else if (Inst.getOpcode() == ARM::tADDspr) {
3319 unsigned Rm = fieldFromInstruction(Insn, 3, 4);
3321 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3322 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3323 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3324 return MCDisassembler::Fail;
3330 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
3331 uint64_t Address, const void *Decoder) {
3332 unsigned imod = fieldFromInstruction(Insn, 4, 1) | 0x2;
3333 unsigned flags = fieldFromInstruction(Insn, 0, 3);
3335 Inst.addOperand(MCOperand::CreateImm(imod));
3336 Inst.addOperand(MCOperand::CreateImm(flags));
3338 return MCDisassembler::Success;
3341 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
3342 uint64_t Address, const void *Decoder) {
3343 DecodeStatus S = MCDisassembler::Success;
3344 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3345 unsigned add = fieldFromInstruction(Insn, 4, 1);
3347 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
3348 return MCDisassembler::Fail;
3349 Inst.addOperand(MCOperand::CreateImm(add));
3354 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Val,
3355 uint64_t Address, const void *Decoder) {
3356 // Val is passed in as S:J1:J2:imm10H:imm10L:'0'
3357 // Note only one trailing zero not two. Also the J1 and J2 values are from
3358 // the encoded instruction. So here change to I1 and I2 values via:
3359 // I1 = NOT(J1 EOR S);
3360 // I2 = NOT(J2 EOR S);
3361 // and build the imm32 with two trailing zeros as documented:
3362 // imm32 = SignExtend(S:I1:I2:imm10H:imm10L:'00', 32);
3363 unsigned S = (Val >> 23) & 1;
3364 unsigned J1 = (Val >> 22) & 1;
3365 unsigned J2 = (Val >> 21) & 1;
3366 unsigned I1 = !(J1 ^ S);
3367 unsigned I2 = !(J2 ^ S);
3368 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
3369 int imm32 = SignExtend32<25>(tmp << 1);
3371 if (!tryAddingSymbolicOperand(Address,
3372 (Address & ~2u) + imm32 + 4,
3373 true, 4, Inst, Decoder))
3374 Inst.addOperand(MCOperand::CreateImm(imm32));
3375 return MCDisassembler::Success;
3378 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Val,
3379 uint64_t Address, const void *Decoder) {
3380 if (Val == 0xA || Val == 0xB)
3381 return MCDisassembler::Fail;
3383 Inst.addOperand(MCOperand::CreateImm(Val));
3384 return MCDisassembler::Success;
3388 DecodeThumbTableBranch(MCInst &Inst, unsigned Insn,
3389 uint64_t Address, const void *Decoder) {
3390 DecodeStatus S = MCDisassembler::Success;
3392 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3393 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3395 if (Rn == ARM::SP) S = MCDisassembler::SoftFail;
3396 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3397 return MCDisassembler::Fail;
3398 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3399 return MCDisassembler::Fail;
3404 DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Insn,
3405 uint64_t Address, const void *Decoder) {
3406 DecodeStatus S = MCDisassembler::Success;
3408 unsigned pred = fieldFromInstruction(Insn, 22, 4);
3409 if (pred == 0xE || pred == 0xF) {
3410 unsigned opc = fieldFromInstruction(Insn, 4, 28);
3413 return MCDisassembler::Fail;
3415 Inst.setOpcode(ARM::t2DSB);
3418 Inst.setOpcode(ARM::t2DMB);
3421 Inst.setOpcode(ARM::t2ISB);
3425 unsigned imm = fieldFromInstruction(Insn, 0, 4);
3426 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
3429 unsigned brtarget = fieldFromInstruction(Insn, 0, 11) << 1;
3430 brtarget |= fieldFromInstruction(Insn, 11, 1) << 19;
3431 brtarget |= fieldFromInstruction(Insn, 13, 1) << 18;
3432 brtarget |= fieldFromInstruction(Insn, 16, 6) << 12;
3433 brtarget |= fieldFromInstruction(Insn, 26, 1) << 20;
3435 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
3436 return MCDisassembler::Fail;
3437 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3438 return MCDisassembler::Fail;
3443 // Decode a shifted immediate operand. These basically consist
3444 // of an 8-bit value, and a 4-bit directive that specifies either
3445 // a splat operation or a rotation.
3446 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
3447 uint64_t Address, const void *Decoder) {
3448 unsigned ctrl = fieldFromInstruction(Val, 10, 2);
3450 unsigned byte = fieldFromInstruction(Val, 8, 2);
3451 unsigned imm = fieldFromInstruction(Val, 0, 8);
3454 Inst.addOperand(MCOperand::CreateImm(imm));
3457 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
3460 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
3463 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
3468 unsigned unrot = fieldFromInstruction(Val, 0, 7) | 0x80;
3469 unsigned rot = fieldFromInstruction(Val, 7, 5);
3470 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
3471 Inst.addOperand(MCOperand::CreateImm(imm));
3474 return MCDisassembler::Success;
3478 DecodeThumbBCCTargetOperand(MCInst &Inst, unsigned Val,
3479 uint64_t Address, const void *Decoder){
3480 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<9>(Val<<1) + 4,
3481 true, 2, Inst, Decoder))
3482 Inst.addOperand(MCOperand::CreateImm(SignExtend32<9>(Val << 1)));
3483 return MCDisassembler::Success;
3486 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
3487 uint64_t Address, const void *Decoder){
3488 // Val is passed in as S:J1:J2:imm10:imm11
3489 // Note no trailing zero after imm11. Also the J1 and J2 values are from
3490 // the encoded instruction. So here change to I1 and I2 values via:
3491 // I1 = NOT(J1 EOR S);
3492 // I2 = NOT(J2 EOR S);
3493 // and build the imm32 with one trailing zero as documented:
3494 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
3495 unsigned S = (Val >> 23) & 1;
3496 unsigned J1 = (Val >> 22) & 1;
3497 unsigned J2 = (Val >> 21) & 1;
3498 unsigned I1 = !(J1 ^ S);
3499 unsigned I2 = !(J2 ^ S);
3500 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
3501 int imm32 = SignExtend32<25>(tmp << 1);
3503 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
3504 true, 4, Inst, Decoder))
3505 Inst.addOperand(MCOperand::CreateImm(imm32));
3506 return MCDisassembler::Success;
3509 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Val,
3510 uint64_t Address, const void *Decoder) {
3512 return MCDisassembler::Fail;
3514 Inst.addOperand(MCOperand::CreateImm(Val));
3515 return MCDisassembler::Success;
3518 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Val,
3519 uint64_t Address, const void *Decoder) {
3520 if (!Val) return MCDisassembler::Fail;
3521 Inst.addOperand(MCOperand::CreateImm(Val));
3522 return MCDisassembler::Success;
3525 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
3526 uint64_t Address, const void *Decoder) {
3527 DecodeStatus S = MCDisassembler::Success;
3529 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3530 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3531 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3533 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3535 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3536 return MCDisassembler::Fail;
3537 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3538 return MCDisassembler::Fail;
3539 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3540 return MCDisassembler::Fail;
3541 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3542 return MCDisassembler::Fail;
3548 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
3549 uint64_t Address, const void *Decoder){
3550 DecodeStatus S = MCDisassembler::Success;
3552 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3553 unsigned Rt = fieldFromInstruction(Insn, 0, 4);
3554 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3555 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3557 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
3558 return MCDisassembler::Fail;
3560 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3561 if (Rd == Rn || Rd == Rt || Rd == Rt+1) return MCDisassembler::Fail;
3563 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3564 return MCDisassembler::Fail;
3565 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3566 return MCDisassembler::Fail;
3567 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3568 return MCDisassembler::Fail;
3569 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3570 return MCDisassembler::Fail;
3575 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
3576 uint64_t Address, const void *Decoder) {
3577 DecodeStatus S = MCDisassembler::Success;
3579 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3580 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3581 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3582 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3583 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3584 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3586 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3588 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3589 return MCDisassembler::Fail;
3590 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3591 return MCDisassembler::Fail;
3592 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3593 return MCDisassembler::Fail;
3594 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3595 return MCDisassembler::Fail;
3600 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
3601 uint64_t Address, const void *Decoder) {
3602 DecodeStatus S = MCDisassembler::Success;
3604 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3605 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3606 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3607 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3608 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3609 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3610 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3612 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3613 if (Rm == 0xF) S = MCDisassembler::SoftFail;
3615 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3616 return MCDisassembler::Fail;
3617 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3618 return MCDisassembler::Fail;
3619 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3620 return MCDisassembler::Fail;
3621 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3622 return MCDisassembler::Fail;
3628 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
3629 uint64_t Address, const void *Decoder) {
3630 DecodeStatus S = MCDisassembler::Success;
3632 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3633 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3634 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3635 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3636 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3637 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3639 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3641 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3642 return MCDisassembler::Fail;
3643 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3644 return MCDisassembler::Fail;
3645 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3646 return MCDisassembler::Fail;
3647 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3648 return MCDisassembler::Fail;
3653 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
3654 uint64_t Address, const void *Decoder) {
3655 DecodeStatus S = MCDisassembler::Success;
3657 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3658 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3659 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3660 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3661 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3662 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3664 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3666 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3667 return MCDisassembler::Fail;
3668 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3669 return MCDisassembler::Fail;
3670 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3671 return MCDisassembler::Fail;
3672 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3673 return MCDisassembler::Fail;
3678 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
3679 uint64_t Address, const void *Decoder) {
3680 DecodeStatus S = MCDisassembler::Success;
3682 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3683 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3684 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3685 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3686 unsigned size = fieldFromInstruction(Insn, 10, 2);
3692 return MCDisassembler::Fail;
3694 if (fieldFromInstruction(Insn, 4, 1))
3695 return MCDisassembler::Fail; // UNDEFINED
3696 index = fieldFromInstruction(Insn, 5, 3);
3699 if (fieldFromInstruction(Insn, 5, 1))
3700 return MCDisassembler::Fail; // UNDEFINED
3701 index = fieldFromInstruction(Insn, 6, 2);
3702 if (fieldFromInstruction(Insn, 4, 1))
3706 if (fieldFromInstruction(Insn, 6, 1))
3707 return MCDisassembler::Fail; // UNDEFINED
3708 index = fieldFromInstruction(Insn, 7, 1);
3710 switch (fieldFromInstruction(Insn, 4, 2)) {
3716 return MCDisassembler::Fail;
3721 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3722 return MCDisassembler::Fail;
3723 if (Rm != 0xF) { // Writeback
3724 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3725 return MCDisassembler::Fail;
3727 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3728 return MCDisassembler::Fail;
3729 Inst.addOperand(MCOperand::CreateImm(align));
3732 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3733 return MCDisassembler::Fail;
3735 Inst.addOperand(MCOperand::CreateReg(0));
3738 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3739 return MCDisassembler::Fail;
3740 Inst.addOperand(MCOperand::CreateImm(index));
3745 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
3746 uint64_t Address, const void *Decoder) {
3747 DecodeStatus S = MCDisassembler::Success;
3749 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3750 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3751 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3752 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3753 unsigned size = fieldFromInstruction(Insn, 10, 2);
3759 return MCDisassembler::Fail;
3761 if (fieldFromInstruction(Insn, 4, 1))
3762 return MCDisassembler::Fail; // UNDEFINED
3763 index = fieldFromInstruction(Insn, 5, 3);
3766 if (fieldFromInstruction(Insn, 5, 1))
3767 return MCDisassembler::Fail; // UNDEFINED
3768 index = fieldFromInstruction(Insn, 6, 2);
3769 if (fieldFromInstruction(Insn, 4, 1))
3773 if (fieldFromInstruction(Insn, 6, 1))
3774 return MCDisassembler::Fail; // UNDEFINED
3775 index = fieldFromInstruction(Insn, 7, 1);
3777 switch (fieldFromInstruction(Insn, 4, 2)) {
3783 return MCDisassembler::Fail;
3788 if (Rm != 0xF) { // Writeback
3789 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3790 return MCDisassembler::Fail;
3792 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3793 return MCDisassembler::Fail;
3794 Inst.addOperand(MCOperand::CreateImm(align));
3797 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3798 return MCDisassembler::Fail;
3800 Inst.addOperand(MCOperand::CreateReg(0));
3803 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3804 return MCDisassembler::Fail;
3805 Inst.addOperand(MCOperand::CreateImm(index));
3811 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
3812 uint64_t Address, const void *Decoder) {
3813 DecodeStatus S = MCDisassembler::Success;
3815 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3816 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3817 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3818 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3819 unsigned size = fieldFromInstruction(Insn, 10, 2);
3826 return MCDisassembler::Fail;
3828 index = fieldFromInstruction(Insn, 5, 3);
3829 if (fieldFromInstruction(Insn, 4, 1))
3833 index = fieldFromInstruction(Insn, 6, 2);
3834 if (fieldFromInstruction(Insn, 4, 1))
3836 if (fieldFromInstruction(Insn, 5, 1))
3840 if (fieldFromInstruction(Insn, 5, 1))
3841 return MCDisassembler::Fail; // UNDEFINED
3842 index = fieldFromInstruction(Insn, 7, 1);
3843 if (fieldFromInstruction(Insn, 4, 1) != 0)
3845 if (fieldFromInstruction(Insn, 6, 1))
3850 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3851 return MCDisassembler::Fail;
3852 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3853 return MCDisassembler::Fail;
3854 if (Rm != 0xF) { // Writeback
3855 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3856 return MCDisassembler::Fail;
3858 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3859 return MCDisassembler::Fail;
3860 Inst.addOperand(MCOperand::CreateImm(align));
3863 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3864 return MCDisassembler::Fail;
3866 Inst.addOperand(MCOperand::CreateReg(0));
3869 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3870 return MCDisassembler::Fail;
3871 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3872 return MCDisassembler::Fail;
3873 Inst.addOperand(MCOperand::CreateImm(index));
3878 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
3879 uint64_t Address, const void *Decoder) {
3880 DecodeStatus S = MCDisassembler::Success;
3882 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3883 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3884 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3885 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3886 unsigned size = fieldFromInstruction(Insn, 10, 2);
3893 return MCDisassembler::Fail;
3895 index = fieldFromInstruction(Insn, 5, 3);
3896 if (fieldFromInstruction(Insn, 4, 1))
3900 index = fieldFromInstruction(Insn, 6, 2);
3901 if (fieldFromInstruction(Insn, 4, 1))
3903 if (fieldFromInstruction(Insn, 5, 1))
3907 if (fieldFromInstruction(Insn, 5, 1))
3908 return MCDisassembler::Fail; // UNDEFINED
3909 index = fieldFromInstruction(Insn, 7, 1);
3910 if (fieldFromInstruction(Insn, 4, 1) != 0)
3912 if (fieldFromInstruction(Insn, 6, 1))
3917 if (Rm != 0xF) { // Writeback
3918 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3919 return MCDisassembler::Fail;
3921 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3922 return MCDisassembler::Fail;
3923 Inst.addOperand(MCOperand::CreateImm(align));
3926 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3927 return MCDisassembler::Fail;
3929 Inst.addOperand(MCOperand::CreateReg(0));
3932 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3933 return MCDisassembler::Fail;
3934 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3935 return MCDisassembler::Fail;
3936 Inst.addOperand(MCOperand::CreateImm(index));
3942 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
3943 uint64_t Address, const void *Decoder) {
3944 DecodeStatus S = MCDisassembler::Success;
3946 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3947 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3948 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3949 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3950 unsigned size = fieldFromInstruction(Insn, 10, 2);
3957 return MCDisassembler::Fail;
3959 if (fieldFromInstruction(Insn, 4, 1))
3960 return MCDisassembler::Fail; // UNDEFINED
3961 index = fieldFromInstruction(Insn, 5, 3);
3964 if (fieldFromInstruction(Insn, 4, 1))
3965 return MCDisassembler::Fail; // UNDEFINED
3966 index = fieldFromInstruction(Insn, 6, 2);
3967 if (fieldFromInstruction(Insn, 5, 1))
3971 if (fieldFromInstruction(Insn, 4, 2))
3972 return MCDisassembler::Fail; // UNDEFINED
3973 index = fieldFromInstruction(Insn, 7, 1);
3974 if (fieldFromInstruction(Insn, 6, 1))
3979 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3980 return MCDisassembler::Fail;
3981 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3982 return MCDisassembler::Fail;
3983 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3984 return MCDisassembler::Fail;
3986 if (Rm != 0xF) { // Writeback
3987 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3988 return MCDisassembler::Fail;
3990 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3991 return MCDisassembler::Fail;
3992 Inst.addOperand(MCOperand::CreateImm(align));
3995 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3996 return MCDisassembler::Fail;
3998 Inst.addOperand(MCOperand::CreateReg(0));
4001 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4002 return MCDisassembler::Fail;
4003 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4004 return MCDisassembler::Fail;
4005 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4006 return MCDisassembler::Fail;
4007 Inst.addOperand(MCOperand::CreateImm(index));
4012 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
4013 uint64_t Address, const void *Decoder) {
4014 DecodeStatus S = MCDisassembler::Success;
4016 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4017 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4018 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4019 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4020 unsigned size = fieldFromInstruction(Insn, 10, 2);
4027 return MCDisassembler::Fail;
4029 if (fieldFromInstruction(Insn, 4, 1))
4030 return MCDisassembler::Fail; // UNDEFINED
4031 index = fieldFromInstruction(Insn, 5, 3);
4034 if (fieldFromInstruction(Insn, 4, 1))
4035 return MCDisassembler::Fail; // UNDEFINED
4036 index = fieldFromInstruction(Insn, 6, 2);
4037 if (fieldFromInstruction(Insn, 5, 1))
4041 if (fieldFromInstruction(Insn, 4, 2))
4042 return MCDisassembler::Fail; // UNDEFINED
4043 index = fieldFromInstruction(Insn, 7, 1);
4044 if (fieldFromInstruction(Insn, 6, 1))
4049 if (Rm != 0xF) { // Writeback
4050 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4051 return MCDisassembler::Fail;
4053 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4054 return MCDisassembler::Fail;
4055 Inst.addOperand(MCOperand::CreateImm(align));
4058 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4059 return MCDisassembler::Fail;
4061 Inst.addOperand(MCOperand::CreateReg(0));
4064 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4065 return MCDisassembler::Fail;
4066 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4067 return MCDisassembler::Fail;
4068 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4069 return MCDisassembler::Fail;
4070 Inst.addOperand(MCOperand::CreateImm(index));
4076 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
4077 uint64_t Address, const void *Decoder) {
4078 DecodeStatus S = MCDisassembler::Success;
4080 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4081 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4082 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4083 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4084 unsigned size = fieldFromInstruction(Insn, 10, 2);
4091 return MCDisassembler::Fail;
4093 if (fieldFromInstruction(Insn, 4, 1))
4095 index = fieldFromInstruction(Insn, 5, 3);
4098 if (fieldFromInstruction(Insn, 4, 1))
4100 index = fieldFromInstruction(Insn, 6, 2);
4101 if (fieldFromInstruction(Insn, 5, 1))
4105 switch (fieldFromInstruction(Insn, 4, 2)) {
4109 return MCDisassembler::Fail;
4111 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4114 index = fieldFromInstruction(Insn, 7, 1);
4115 if (fieldFromInstruction(Insn, 6, 1))
4120 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4121 return MCDisassembler::Fail;
4122 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4123 return MCDisassembler::Fail;
4124 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4125 return MCDisassembler::Fail;
4126 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4127 return MCDisassembler::Fail;
4129 if (Rm != 0xF) { // Writeback
4130 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4131 return MCDisassembler::Fail;
4133 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4134 return MCDisassembler::Fail;
4135 Inst.addOperand(MCOperand::CreateImm(align));
4138 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4139 return MCDisassembler::Fail;
4141 Inst.addOperand(MCOperand::CreateReg(0));
4144 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4145 return MCDisassembler::Fail;
4146 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4147 return MCDisassembler::Fail;
4148 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4149 return MCDisassembler::Fail;
4150 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4151 return MCDisassembler::Fail;
4152 Inst.addOperand(MCOperand::CreateImm(index));
4157 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
4158 uint64_t Address, const void *Decoder) {
4159 DecodeStatus S = MCDisassembler::Success;
4161 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4162 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4163 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4164 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4165 unsigned size = fieldFromInstruction(Insn, 10, 2);
4172 return MCDisassembler::Fail;
4174 if (fieldFromInstruction(Insn, 4, 1))
4176 index = fieldFromInstruction(Insn, 5, 3);
4179 if (fieldFromInstruction(Insn, 4, 1))
4181 index = fieldFromInstruction(Insn, 6, 2);
4182 if (fieldFromInstruction(Insn, 5, 1))
4186 switch (fieldFromInstruction(Insn, 4, 2)) {
4190 return MCDisassembler::Fail;
4192 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4195 index = fieldFromInstruction(Insn, 7, 1);
4196 if (fieldFromInstruction(Insn, 6, 1))
4201 if (Rm != 0xF) { // Writeback
4202 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4203 return MCDisassembler::Fail;
4205 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4206 return MCDisassembler::Fail;
4207 Inst.addOperand(MCOperand::CreateImm(align));
4210 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4211 return MCDisassembler::Fail;
4213 Inst.addOperand(MCOperand::CreateReg(0));
4216 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4217 return MCDisassembler::Fail;
4218 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4219 return MCDisassembler::Fail;
4220 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4221 return MCDisassembler::Fail;
4222 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4223 return MCDisassembler::Fail;
4224 Inst.addOperand(MCOperand::CreateImm(index));
4229 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
4230 uint64_t Address, const void *Decoder) {
4231 DecodeStatus S = MCDisassembler::Success;
4232 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4233 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4234 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4235 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4236 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4238 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4239 S = MCDisassembler::SoftFail;
4241 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4242 return MCDisassembler::Fail;
4243 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4244 return MCDisassembler::Fail;
4245 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4246 return MCDisassembler::Fail;
4247 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4248 return MCDisassembler::Fail;
4249 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4250 return MCDisassembler::Fail;
4255 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
4256 uint64_t Address, const void *Decoder) {
4257 DecodeStatus S = MCDisassembler::Success;
4258 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4259 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4260 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4261 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4262 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4264 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4265 S = MCDisassembler::SoftFail;
4267 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4268 return MCDisassembler::Fail;
4269 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4270 return MCDisassembler::Fail;
4271 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4272 return MCDisassembler::Fail;
4273 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4274 return MCDisassembler::Fail;
4275 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4276 return MCDisassembler::Fail;
4281 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Insn,
4282 uint64_t Address, const void *Decoder) {
4283 DecodeStatus S = MCDisassembler::Success;
4284 unsigned pred = fieldFromInstruction(Insn, 4, 4);
4285 unsigned mask = fieldFromInstruction(Insn, 0, 4);
4289 S = MCDisassembler::SoftFail;
4294 S = MCDisassembler::SoftFail;
4297 Inst.addOperand(MCOperand::CreateImm(pred));
4298 Inst.addOperand(MCOperand::CreateImm(mask));
4303 DecodeT2LDRDPreInstruction(MCInst &Inst, unsigned Insn,
4304 uint64_t Address, const void *Decoder) {
4305 DecodeStatus S = MCDisassembler::Success;
4307 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4308 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
4309 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4310 unsigned addr = fieldFromInstruction(Insn, 0, 8);
4311 unsigned W = fieldFromInstruction(Insn, 21, 1);
4312 unsigned U = fieldFromInstruction(Insn, 23, 1);
4313 unsigned P = fieldFromInstruction(Insn, 24, 1);
4314 bool writeback = (W == 1) | (P == 0);
4316 addr |= (U << 8) | (Rn << 9);
4318 if (writeback && (Rn == Rt || Rn == Rt2))
4319 Check(S, MCDisassembler::SoftFail);
4321 Check(S, MCDisassembler::SoftFail);
4324 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4325 return MCDisassembler::Fail;
4327 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4328 return MCDisassembler::Fail;
4329 // Writeback operand
4330 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4331 return MCDisassembler::Fail;
4333 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4334 return MCDisassembler::Fail;
4340 DecodeT2STRDPreInstruction(MCInst &Inst, unsigned Insn,
4341 uint64_t Address, const void *Decoder) {
4342 DecodeStatus S = MCDisassembler::Success;
4344 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4345 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
4346 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4347 unsigned addr = fieldFromInstruction(Insn, 0, 8);
4348 unsigned W = fieldFromInstruction(Insn, 21, 1);
4349 unsigned U = fieldFromInstruction(Insn, 23, 1);
4350 unsigned P = fieldFromInstruction(Insn, 24, 1);
4351 bool writeback = (W == 1) | (P == 0);
4353 addr |= (U << 8) | (Rn << 9);
4355 if (writeback && (Rn == Rt || Rn == Rt2))
4356 Check(S, MCDisassembler::SoftFail);
4358 // Writeback operand
4359 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4360 return MCDisassembler::Fail;
4362 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4363 return MCDisassembler::Fail;
4365 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4366 return MCDisassembler::Fail;
4368 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4369 return MCDisassembler::Fail;
4374 static DecodeStatus DecodeT2Adr(MCInst &Inst, uint32_t Insn,
4375 uint64_t Address, const void *Decoder) {
4376 unsigned sign1 = fieldFromInstruction(Insn, 21, 1);
4377 unsigned sign2 = fieldFromInstruction(Insn, 23, 1);
4378 if (sign1 != sign2) return MCDisassembler::Fail;
4380 unsigned Val = fieldFromInstruction(Insn, 0, 8);
4381 Val |= fieldFromInstruction(Insn, 12, 3) << 8;
4382 Val |= fieldFromInstruction(Insn, 26, 1) << 11;
4384 Inst.addOperand(MCOperand::CreateImm(SignExtend32<13>(Val)));
4386 return MCDisassembler::Success;
4389 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, uint32_t Val,
4391 const void *Decoder) {
4392 DecodeStatus S = MCDisassembler::Success;
4394 // Shift of "asr #32" is not allowed in Thumb2 mode.
4395 if (Val == 0x20) S = MCDisassembler::SoftFail;
4396 Inst.addOperand(MCOperand::CreateImm(Val));
4400 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
4401 uint64_t Address, const void *Decoder) {
4402 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4403 unsigned Rt2 = fieldFromInstruction(Insn, 0, 4);
4404 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4405 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4408 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
4410 DecodeStatus S = MCDisassembler::Success;
4412 if (Rt == Rn || Rn == Rt2)
4413 S = MCDisassembler::SoftFail;
4415 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4416 return MCDisassembler::Fail;
4417 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
4418 return MCDisassembler::Fail;
4419 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4420 return MCDisassembler::Fail;
4421 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4422 return MCDisassembler::Fail;
4427 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
4428 uint64_t Address, const void *Decoder) {
4429 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
4430 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
4431 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
4432 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
4433 unsigned imm = fieldFromInstruction(Insn, 16, 6);
4434 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
4436 DecodeStatus S = MCDisassembler::Success;
4438 // VMOVv2f32 is ambiguous with these decodings.
4439 if (!(imm & 0x38) && cmode == 0xF) {
4440 Inst.setOpcode(ARM::VMOVv2f32);
4441 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4444 if (!(imm & 0x20)) Check(S, MCDisassembler::SoftFail);
4446 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
4447 return MCDisassembler::Fail;
4448 if (!Check(S, DecodeDPRRegisterClass(Inst, Vm, Address, Decoder)))
4449 return MCDisassembler::Fail;
4450 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4455 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
4456 uint64_t Address, const void *Decoder) {
4457 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
4458 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
4459 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
4460 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
4461 unsigned imm = fieldFromInstruction(Insn, 16, 6);
4462 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
4464 DecodeStatus S = MCDisassembler::Success;
4466 // VMOVv4f32 is ambiguous with these decodings.
4467 if (!(imm & 0x38) && cmode == 0xF) {
4468 Inst.setOpcode(ARM::VMOVv4f32);
4469 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4472 if (!(imm & 0x20)) Check(S, MCDisassembler::SoftFail);
4474 if (!Check(S, DecodeQPRRegisterClass(Inst, Vd, Address, Decoder)))
4475 return MCDisassembler::Fail;
4476 if (!Check(S, DecodeQPRRegisterClass(Inst, Vm, Address, Decoder)))
4477 return MCDisassembler::Fail;
4478 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4483 static DecodeStatus DecodeImm0_4(MCInst &Inst, unsigned Insn, uint64_t Address,
4484 const void *Decoder)
4486 unsigned Imm = fieldFromInstruction(Insn, 0, 3);
4487 if (Imm > 4) return MCDisassembler::Fail;
4488 Inst.addOperand(MCOperand::CreateImm(Imm));
4489 return MCDisassembler::Success;
4492 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
4493 uint64_t Address, const void *Decoder) {
4494 DecodeStatus S = MCDisassembler::Success;
4496 unsigned Rn = fieldFromInstruction(Val, 16, 4);
4497 unsigned Rt = fieldFromInstruction(Val, 12, 4);
4498 unsigned Rm = fieldFromInstruction(Val, 0, 4);
4499 Rm |= (fieldFromInstruction(Val, 23, 1) << 4);
4500 unsigned Cond = fieldFromInstruction(Val, 28, 4);
4502 if (fieldFromInstruction(Val, 8, 4) != 0 || Rn == Rt)
4503 S = MCDisassembler::SoftFail;
4505 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4506 return MCDisassembler::Fail;
4507 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4508 return MCDisassembler::Fail;
4509 if (!Check(S, DecodeAddrMode7Operand(Inst, Rn, Address, Decoder)))
4510 return MCDisassembler::Fail;
4511 if (!Check(S, DecodePostIdxReg(Inst, Rm, Address, Decoder)))
4512 return MCDisassembler::Fail;
4513 if (!Check(S, DecodePredicateOperand(Inst, Cond, Address, Decoder)))
4514 return MCDisassembler::Fail;
4519 static DecodeStatus DecodeMRRC2(llvm::MCInst &Inst, unsigned Val,
4520 uint64_t Address, const void *Decoder) {
4522 DecodeStatus S = MCDisassembler::Success;
4524 unsigned CRm = fieldFromInstruction(Val, 0, 4);
4525 unsigned opc1 = fieldFromInstruction(Val, 4, 4);
4526 unsigned cop = fieldFromInstruction(Val, 8, 4);
4527 unsigned Rt = fieldFromInstruction(Val, 12, 4);
4528 unsigned Rt2 = fieldFromInstruction(Val, 16, 4);
4530 if ((cop & ~0x1) == 0xa)
4531 return MCDisassembler::Fail;
4534 S = MCDisassembler::SoftFail;
4536 Inst.addOperand(MCOperand::CreateImm(cop));
4537 Inst.addOperand(MCOperand::CreateImm(opc1));
4538 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4539 return MCDisassembler::Fail;
4540 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
4541 return MCDisassembler::Fail;
4542 Inst.addOperand(MCOperand::CreateImm(CRm));