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 if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
1154 return MCDisassembler::Fail;
1155 for (unsigned i = 0; i < (regs - 1); ++i) {
1156 if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1157 return MCDisassembler::Fail;
1163 static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
1164 uint64_t Address, const void *Decoder) {
1165 DecodeStatus S = MCDisassembler::Success;
1167 unsigned Vd = fieldFromInstruction(Val, 8, 5);
1168 unsigned regs = fieldFromInstruction(Val, 0, 8);
1172 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
1173 return MCDisassembler::Fail;
1174 for (unsigned i = 0; i < (regs - 1); ++i) {
1175 if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1176 return MCDisassembler::Fail;
1182 static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Val,
1183 uint64_t Address, const void *Decoder) {
1184 // This operand encodes a mask of contiguous zeros between a specified MSB
1185 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
1186 // the mask of all bits LSB-and-lower, and then xor them to create
1187 // the mask of that's all ones on [msb, lsb]. Finally we not it to
1188 // create the final mask.
1189 unsigned msb = fieldFromInstruction(Val, 5, 5);
1190 unsigned lsb = fieldFromInstruction(Val, 0, 5);
1192 DecodeStatus S = MCDisassembler::Success;
1194 Check(S, MCDisassembler::SoftFail);
1195 // The check above will cause the warning for the "potentially undefined
1196 // instruction encoding" but we can't build a bad MCOperand value here
1197 // with a lsb > msb or else printing the MCInst will cause a crash.
1201 uint32_t msb_mask = 0xFFFFFFFF;
1202 if (msb != 31) msb_mask = (1U << (msb+1)) - 1;
1203 uint32_t lsb_mask = (1U << lsb) - 1;
1205 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
1209 static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
1210 uint64_t Address, const void *Decoder) {
1211 DecodeStatus S = MCDisassembler::Success;
1213 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1214 unsigned CRd = fieldFromInstruction(Insn, 12, 4);
1215 unsigned coproc = fieldFromInstruction(Insn, 8, 4);
1216 unsigned imm = fieldFromInstruction(Insn, 0, 8);
1217 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1218 unsigned U = fieldFromInstruction(Insn, 23, 1);
1220 switch (Inst.getOpcode()) {
1221 case ARM::LDC_OFFSET:
1224 case ARM::LDC_OPTION:
1225 case ARM::LDCL_OFFSET:
1227 case ARM::LDCL_POST:
1228 case ARM::LDCL_OPTION:
1229 case ARM::STC_OFFSET:
1232 case ARM::STC_OPTION:
1233 case ARM::STCL_OFFSET:
1235 case ARM::STCL_POST:
1236 case ARM::STCL_OPTION:
1237 case ARM::t2LDC_OFFSET:
1238 case ARM::t2LDC_PRE:
1239 case ARM::t2LDC_POST:
1240 case ARM::t2LDC_OPTION:
1241 case ARM::t2LDCL_OFFSET:
1242 case ARM::t2LDCL_PRE:
1243 case ARM::t2LDCL_POST:
1244 case ARM::t2LDCL_OPTION:
1245 case ARM::t2STC_OFFSET:
1246 case ARM::t2STC_PRE:
1247 case ARM::t2STC_POST:
1248 case ARM::t2STC_OPTION:
1249 case ARM::t2STCL_OFFSET:
1250 case ARM::t2STCL_PRE:
1251 case ARM::t2STCL_POST:
1252 case ARM::t2STCL_OPTION:
1253 if (coproc == 0xA || coproc == 0xB)
1254 return MCDisassembler::Fail;
1260 Inst.addOperand(MCOperand::CreateImm(coproc));
1261 Inst.addOperand(MCOperand::CreateImm(CRd));
1262 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1263 return MCDisassembler::Fail;
1265 switch (Inst.getOpcode()) {
1266 case ARM::t2LDC2_OFFSET:
1267 case ARM::t2LDC2L_OFFSET:
1268 case ARM::t2LDC2_PRE:
1269 case ARM::t2LDC2L_PRE:
1270 case ARM::t2STC2_OFFSET:
1271 case ARM::t2STC2L_OFFSET:
1272 case ARM::t2STC2_PRE:
1273 case ARM::t2STC2L_PRE:
1274 case ARM::LDC2_OFFSET:
1275 case ARM::LDC2L_OFFSET:
1277 case ARM::LDC2L_PRE:
1278 case ARM::STC2_OFFSET:
1279 case ARM::STC2L_OFFSET:
1281 case ARM::STC2L_PRE:
1282 case ARM::t2LDC_OFFSET:
1283 case ARM::t2LDCL_OFFSET:
1284 case ARM::t2LDC_PRE:
1285 case ARM::t2LDCL_PRE:
1286 case ARM::t2STC_OFFSET:
1287 case ARM::t2STCL_OFFSET:
1288 case ARM::t2STC_PRE:
1289 case ARM::t2STCL_PRE:
1290 case ARM::LDC_OFFSET:
1291 case ARM::LDCL_OFFSET:
1294 case ARM::STC_OFFSET:
1295 case ARM::STCL_OFFSET:
1298 imm = ARM_AM::getAM5Opc(U ? ARM_AM::add : ARM_AM::sub, imm);
1299 Inst.addOperand(MCOperand::CreateImm(imm));
1301 case ARM::t2LDC2_POST:
1302 case ARM::t2LDC2L_POST:
1303 case ARM::t2STC2_POST:
1304 case ARM::t2STC2L_POST:
1305 case ARM::LDC2_POST:
1306 case ARM::LDC2L_POST:
1307 case ARM::STC2_POST:
1308 case ARM::STC2L_POST:
1309 case ARM::t2LDC_POST:
1310 case ARM::t2LDCL_POST:
1311 case ARM::t2STC_POST:
1312 case ARM::t2STCL_POST:
1314 case ARM::LDCL_POST:
1316 case ARM::STCL_POST:
1320 // The 'option' variant doesn't encode 'U' in the immediate since
1321 // the immediate is unsigned [0,255].
1322 Inst.addOperand(MCOperand::CreateImm(imm));
1326 switch (Inst.getOpcode()) {
1327 case ARM::LDC_OFFSET:
1330 case ARM::LDC_OPTION:
1331 case ARM::LDCL_OFFSET:
1333 case ARM::LDCL_POST:
1334 case ARM::LDCL_OPTION:
1335 case ARM::STC_OFFSET:
1338 case ARM::STC_OPTION:
1339 case ARM::STCL_OFFSET:
1341 case ARM::STCL_POST:
1342 case ARM::STCL_OPTION:
1343 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1344 return MCDisassembler::Fail;
1354 DecodeAddrMode2IdxInstruction(MCInst &Inst, unsigned Insn,
1355 uint64_t Address, const void *Decoder) {
1356 DecodeStatus S = MCDisassembler::Success;
1358 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1359 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1360 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1361 unsigned imm = fieldFromInstruction(Insn, 0, 12);
1362 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1363 unsigned reg = fieldFromInstruction(Insn, 25, 1);
1364 unsigned P = fieldFromInstruction(Insn, 24, 1);
1365 unsigned W = fieldFromInstruction(Insn, 21, 1);
1367 // On stores, the writeback operand precedes Rt.
1368 switch (Inst.getOpcode()) {
1369 case ARM::STR_POST_IMM:
1370 case ARM::STR_POST_REG:
1371 case ARM::STRB_POST_IMM:
1372 case ARM::STRB_POST_REG:
1373 case ARM::STRT_POST_REG:
1374 case ARM::STRT_POST_IMM:
1375 case ARM::STRBT_POST_REG:
1376 case ARM::STRBT_POST_IMM:
1377 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1378 return MCDisassembler::Fail;
1384 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1385 return MCDisassembler::Fail;
1387 // On loads, the writeback operand comes after Rt.
1388 switch (Inst.getOpcode()) {
1389 case ARM::LDR_POST_IMM:
1390 case ARM::LDR_POST_REG:
1391 case ARM::LDRB_POST_IMM:
1392 case ARM::LDRB_POST_REG:
1393 case ARM::LDRBT_POST_REG:
1394 case ARM::LDRBT_POST_IMM:
1395 case ARM::LDRT_POST_REG:
1396 case ARM::LDRT_POST_IMM:
1397 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1398 return MCDisassembler::Fail;
1404 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1405 return MCDisassembler::Fail;
1407 ARM_AM::AddrOpc Op = ARM_AM::add;
1408 if (!fieldFromInstruction(Insn, 23, 1))
1411 bool writeback = (P == 0) || (W == 1);
1412 unsigned idx_mode = 0;
1414 idx_mode = ARMII::IndexModePre;
1415 else if (!P && writeback)
1416 idx_mode = ARMII::IndexModePost;
1418 if (writeback && (Rn == 15 || Rn == Rt))
1419 S = MCDisassembler::SoftFail; // UNPREDICTABLE
1422 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1423 return MCDisassembler::Fail;
1424 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1425 switch( fieldFromInstruction(Insn, 5, 2)) {
1439 return MCDisassembler::Fail;
1441 unsigned amt = fieldFromInstruction(Insn, 7, 5);
1442 if (Opc == ARM_AM::ror && amt == 0)
1444 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1446 Inst.addOperand(MCOperand::CreateImm(imm));
1448 Inst.addOperand(MCOperand::CreateReg(0));
1449 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1450 Inst.addOperand(MCOperand::CreateImm(tmp));
1453 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1454 return MCDisassembler::Fail;
1459 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Val,
1460 uint64_t Address, const void *Decoder) {
1461 DecodeStatus S = MCDisassembler::Success;
1463 unsigned Rn = fieldFromInstruction(Val, 13, 4);
1464 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1465 unsigned type = fieldFromInstruction(Val, 5, 2);
1466 unsigned imm = fieldFromInstruction(Val, 7, 5);
1467 unsigned U = fieldFromInstruction(Val, 12, 1);
1469 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1485 if (ShOp == ARM_AM::ror && imm == 0)
1488 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1489 return MCDisassembler::Fail;
1490 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1491 return MCDisassembler::Fail;
1494 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1496 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1497 Inst.addOperand(MCOperand::CreateImm(shift));
1503 DecodeAddrMode3Instruction(MCInst &Inst, unsigned Insn,
1504 uint64_t Address, const void *Decoder) {
1505 DecodeStatus S = MCDisassembler::Success;
1507 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1508 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1509 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1510 unsigned type = fieldFromInstruction(Insn, 22, 1);
1511 unsigned imm = fieldFromInstruction(Insn, 8, 4);
1512 unsigned U = ((~fieldFromInstruction(Insn, 23, 1)) & 1) << 8;
1513 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1514 unsigned W = fieldFromInstruction(Insn, 21, 1);
1515 unsigned P = fieldFromInstruction(Insn, 24, 1);
1516 unsigned Rt2 = Rt + 1;
1518 bool writeback = (W == 1) | (P == 0);
1520 // For {LD,ST}RD, Rt must be even, else undefined.
1521 switch (Inst.getOpcode()) {
1524 case ARM::STRD_POST:
1527 case ARM::LDRD_POST:
1528 if (Rt & 0x1) S = MCDisassembler::SoftFail;
1533 switch (Inst.getOpcode()) {
1536 case ARM::STRD_POST:
1537 if (P == 0 && W == 1)
1538 S = MCDisassembler::SoftFail;
1540 if (writeback && (Rn == 15 || Rn == Rt || Rn == Rt2))
1541 S = MCDisassembler::SoftFail;
1542 if (type && Rm == 15)
1543 S = MCDisassembler::SoftFail;
1545 S = MCDisassembler::SoftFail;
1546 if (!type && fieldFromInstruction(Insn, 8, 4))
1547 S = MCDisassembler::SoftFail;
1551 case ARM::STRH_POST:
1553 S = MCDisassembler::SoftFail;
1554 if (writeback && (Rn == 15 || Rn == Rt))
1555 S = MCDisassembler::SoftFail;
1556 if (!type && Rm == 15)
1557 S = MCDisassembler::SoftFail;
1561 case ARM::LDRD_POST:
1562 if (type && Rn == 15){
1564 S = MCDisassembler::SoftFail;
1567 if (P == 0 && W == 1)
1568 S = MCDisassembler::SoftFail;
1569 if (!type && (Rt2 == 15 || Rm == 15 || Rm == Rt || Rm == Rt2))
1570 S = MCDisassembler::SoftFail;
1571 if (!type && writeback && Rn == 15)
1572 S = MCDisassembler::SoftFail;
1573 if (writeback && (Rn == Rt || Rn == Rt2))
1574 S = MCDisassembler::SoftFail;
1578 case ARM::LDRH_POST:
1579 if (type && Rn == 15){
1581 S = MCDisassembler::SoftFail;
1585 S = MCDisassembler::SoftFail;
1586 if (!type && Rm == 15)
1587 S = MCDisassembler::SoftFail;
1588 if (!type && writeback && (Rn == 15 || Rn == Rt))
1589 S = MCDisassembler::SoftFail;
1592 case ARM::LDRSH_PRE:
1593 case ARM::LDRSH_POST:
1595 case ARM::LDRSB_PRE:
1596 case ARM::LDRSB_POST:
1597 if (type && Rn == 15){
1599 S = MCDisassembler::SoftFail;
1602 if (type && (Rt == 15 || (writeback && Rn == Rt)))
1603 S = MCDisassembler::SoftFail;
1604 if (!type && (Rt == 15 || Rm == 15))
1605 S = MCDisassembler::SoftFail;
1606 if (!type && writeback && (Rn == 15 || Rn == Rt))
1607 S = MCDisassembler::SoftFail;
1613 if (writeback) { // Writeback
1615 U |= ARMII::IndexModePre << 9;
1617 U |= ARMII::IndexModePost << 9;
1619 // On stores, the writeback operand precedes Rt.
1620 switch (Inst.getOpcode()) {
1623 case ARM::STRD_POST:
1626 case ARM::STRH_POST:
1627 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1628 return MCDisassembler::Fail;
1635 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1636 return MCDisassembler::Fail;
1637 switch (Inst.getOpcode()) {
1640 case ARM::STRD_POST:
1643 case ARM::LDRD_POST:
1644 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
1645 return MCDisassembler::Fail;
1652 // On loads, the writeback operand comes after Rt.
1653 switch (Inst.getOpcode()) {
1656 case ARM::LDRD_POST:
1659 case ARM::LDRH_POST:
1661 case ARM::LDRSH_PRE:
1662 case ARM::LDRSH_POST:
1664 case ARM::LDRSB_PRE:
1665 case ARM::LDRSB_POST:
1668 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1669 return MCDisassembler::Fail;
1676 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1677 return MCDisassembler::Fail;
1680 Inst.addOperand(MCOperand::CreateReg(0));
1681 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1683 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1684 return MCDisassembler::Fail;
1685 Inst.addOperand(MCOperand::CreateImm(U));
1688 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1689 return MCDisassembler::Fail;
1694 static DecodeStatus DecodeRFEInstruction(MCInst &Inst, unsigned Insn,
1695 uint64_t Address, const void *Decoder) {
1696 DecodeStatus S = MCDisassembler::Success;
1698 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1699 unsigned mode = fieldFromInstruction(Insn, 23, 2);
1716 Inst.addOperand(MCOperand::CreateImm(mode));
1717 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1718 return MCDisassembler::Fail;
1723 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst &Inst,
1725 uint64_t Address, const void *Decoder) {
1726 DecodeStatus S = MCDisassembler::Success;
1728 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1729 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1730 unsigned reglist = fieldFromInstruction(Insn, 0, 16);
1733 switch (Inst.getOpcode()) {
1735 Inst.setOpcode(ARM::RFEDA);
1737 case ARM::LDMDA_UPD:
1738 Inst.setOpcode(ARM::RFEDA_UPD);
1741 Inst.setOpcode(ARM::RFEDB);
1743 case ARM::LDMDB_UPD:
1744 Inst.setOpcode(ARM::RFEDB_UPD);
1747 Inst.setOpcode(ARM::RFEIA);
1749 case ARM::LDMIA_UPD:
1750 Inst.setOpcode(ARM::RFEIA_UPD);
1753 Inst.setOpcode(ARM::RFEIB);
1755 case ARM::LDMIB_UPD:
1756 Inst.setOpcode(ARM::RFEIB_UPD);
1759 Inst.setOpcode(ARM::SRSDA);
1761 case ARM::STMDA_UPD:
1762 Inst.setOpcode(ARM::SRSDA_UPD);
1765 Inst.setOpcode(ARM::SRSDB);
1767 case ARM::STMDB_UPD:
1768 Inst.setOpcode(ARM::SRSDB_UPD);
1771 Inst.setOpcode(ARM::SRSIA);
1773 case ARM::STMIA_UPD:
1774 Inst.setOpcode(ARM::SRSIA_UPD);
1777 Inst.setOpcode(ARM::SRSIB);
1779 case ARM::STMIB_UPD:
1780 Inst.setOpcode(ARM::SRSIB_UPD);
1783 if (!Check(S, MCDisassembler::Fail)) return MCDisassembler::Fail;
1786 // For stores (which become SRS's, the only operand is the mode.
1787 if (fieldFromInstruction(Insn, 20, 1) == 0) {
1789 MCOperand::CreateImm(fieldFromInstruction(Insn, 0, 4)));
1793 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1796 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1797 return MCDisassembler::Fail;
1798 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1799 return MCDisassembler::Fail; // Tied
1800 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1801 return MCDisassembler::Fail;
1802 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
1803 return MCDisassembler::Fail;
1808 static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
1809 uint64_t Address, const void *Decoder) {
1810 unsigned imod = fieldFromInstruction(Insn, 18, 2);
1811 unsigned M = fieldFromInstruction(Insn, 17, 1);
1812 unsigned iflags = fieldFromInstruction(Insn, 6, 3);
1813 unsigned mode = fieldFromInstruction(Insn, 0, 5);
1815 DecodeStatus S = MCDisassembler::Success;
1817 // imod == '01' --> UNPREDICTABLE
1818 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1819 // return failure here. The '01' imod value is unprintable, so there's
1820 // nothing useful we could do even if we returned UNPREDICTABLE.
1822 if (imod == 1) return MCDisassembler::Fail;
1825 Inst.setOpcode(ARM::CPS3p);
1826 Inst.addOperand(MCOperand::CreateImm(imod));
1827 Inst.addOperand(MCOperand::CreateImm(iflags));
1828 Inst.addOperand(MCOperand::CreateImm(mode));
1829 } else if (imod && !M) {
1830 Inst.setOpcode(ARM::CPS2p);
1831 Inst.addOperand(MCOperand::CreateImm(imod));
1832 Inst.addOperand(MCOperand::CreateImm(iflags));
1833 if (mode) S = MCDisassembler::SoftFail;
1834 } else if (!imod && M) {
1835 Inst.setOpcode(ARM::CPS1p);
1836 Inst.addOperand(MCOperand::CreateImm(mode));
1837 if (iflags) S = MCDisassembler::SoftFail;
1839 // imod == '00' && M == '0' --> UNPREDICTABLE
1840 Inst.setOpcode(ARM::CPS1p);
1841 Inst.addOperand(MCOperand::CreateImm(mode));
1842 S = MCDisassembler::SoftFail;
1848 static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
1849 uint64_t Address, const void *Decoder) {
1850 unsigned imod = fieldFromInstruction(Insn, 9, 2);
1851 unsigned M = fieldFromInstruction(Insn, 8, 1);
1852 unsigned iflags = fieldFromInstruction(Insn, 5, 3);
1853 unsigned mode = fieldFromInstruction(Insn, 0, 5);
1855 DecodeStatus S = MCDisassembler::Success;
1857 // imod == '01' --> UNPREDICTABLE
1858 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1859 // return failure here. The '01' imod value is unprintable, so there's
1860 // nothing useful we could do even if we returned UNPREDICTABLE.
1862 if (imod == 1) return MCDisassembler::Fail;
1865 Inst.setOpcode(ARM::t2CPS3p);
1866 Inst.addOperand(MCOperand::CreateImm(imod));
1867 Inst.addOperand(MCOperand::CreateImm(iflags));
1868 Inst.addOperand(MCOperand::CreateImm(mode));
1869 } else if (imod && !M) {
1870 Inst.setOpcode(ARM::t2CPS2p);
1871 Inst.addOperand(MCOperand::CreateImm(imod));
1872 Inst.addOperand(MCOperand::CreateImm(iflags));
1873 if (mode) S = MCDisassembler::SoftFail;
1874 } else if (!imod && M) {
1875 Inst.setOpcode(ARM::t2CPS1p);
1876 Inst.addOperand(MCOperand::CreateImm(mode));
1877 if (iflags) S = MCDisassembler::SoftFail;
1879 // imod == '00' && M == '0' --> this is a HINT instruction
1880 int imm = fieldFromInstruction(Insn, 0, 8);
1881 // HINT are defined only for immediate in [0..4]
1882 if(imm > 4) return MCDisassembler::Fail;
1883 Inst.setOpcode(ARM::t2HINT);
1884 Inst.addOperand(MCOperand::CreateImm(imm));
1890 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
1891 uint64_t Address, const void *Decoder) {
1892 DecodeStatus S = MCDisassembler::Success;
1894 unsigned Rd = fieldFromInstruction(Insn, 8, 4);
1897 imm |= (fieldFromInstruction(Insn, 0, 8) << 0);
1898 imm |= (fieldFromInstruction(Insn, 12, 3) << 8);
1899 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
1900 imm |= (fieldFromInstruction(Insn, 26, 1) << 11);
1902 if (Inst.getOpcode() == ARM::t2MOVTi16)
1903 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1904 return MCDisassembler::Fail;
1905 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1906 return MCDisassembler::Fail;
1908 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
1909 Inst.addOperand(MCOperand::CreateImm(imm));
1914 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
1915 uint64_t Address, const void *Decoder) {
1916 DecodeStatus S = MCDisassembler::Success;
1918 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
1919 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1922 imm |= (fieldFromInstruction(Insn, 0, 12) << 0);
1923 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
1925 if (Inst.getOpcode() == ARM::MOVTi16)
1926 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1927 return MCDisassembler::Fail;
1929 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1930 return MCDisassembler::Fail;
1932 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
1933 Inst.addOperand(MCOperand::CreateImm(imm));
1935 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1936 return MCDisassembler::Fail;
1941 static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
1942 uint64_t Address, const void *Decoder) {
1943 DecodeStatus S = MCDisassembler::Success;
1945 unsigned Rd = fieldFromInstruction(Insn, 16, 4);
1946 unsigned Rn = fieldFromInstruction(Insn, 0, 4);
1947 unsigned Rm = fieldFromInstruction(Insn, 8, 4);
1948 unsigned Ra = fieldFromInstruction(Insn, 12, 4);
1949 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1952 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
1954 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1955 return MCDisassembler::Fail;
1956 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
1957 return MCDisassembler::Fail;
1958 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1959 return MCDisassembler::Fail;
1960 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
1961 return MCDisassembler::Fail;
1963 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1964 return MCDisassembler::Fail;
1969 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
1970 uint64_t Address, const void *Decoder) {
1971 DecodeStatus S = MCDisassembler::Success;
1973 unsigned add = fieldFromInstruction(Val, 12, 1);
1974 unsigned imm = fieldFromInstruction(Val, 0, 12);
1975 unsigned Rn = fieldFromInstruction(Val, 13, 4);
1977 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1978 return MCDisassembler::Fail;
1980 if (!add) imm *= -1;
1981 if (imm == 0 && !add) imm = INT32_MIN;
1982 Inst.addOperand(MCOperand::CreateImm(imm));
1984 tryAddingPcLoadReferenceComment(Address, Address + imm + 8, Decoder);
1989 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
1990 uint64_t Address, const void *Decoder) {
1991 DecodeStatus S = MCDisassembler::Success;
1993 unsigned Rn = fieldFromInstruction(Val, 9, 4);
1994 unsigned U = fieldFromInstruction(Val, 8, 1);
1995 unsigned imm = fieldFromInstruction(Val, 0, 8);
1997 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1998 return MCDisassembler::Fail;
2001 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
2003 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
2008 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
2009 uint64_t Address, const void *Decoder) {
2010 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
2014 DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
2015 uint64_t Address, const void *Decoder) {
2016 DecodeStatus Status = MCDisassembler::Success;
2018 // Note the J1 and J2 values are from the encoded instruction. So here
2019 // change them to I1 and I2 values via as documented:
2020 // I1 = NOT(J1 EOR S);
2021 // I2 = NOT(J2 EOR S);
2022 // and build the imm32 with one trailing zero as documented:
2023 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
2024 unsigned S = fieldFromInstruction(Insn, 26, 1);
2025 unsigned J1 = fieldFromInstruction(Insn, 13, 1);
2026 unsigned J2 = fieldFromInstruction(Insn, 11, 1);
2027 unsigned I1 = !(J1 ^ S);
2028 unsigned I2 = !(J2 ^ S);
2029 unsigned imm10 = fieldFromInstruction(Insn, 16, 10);
2030 unsigned imm11 = fieldFromInstruction(Insn, 0, 11);
2031 unsigned tmp = (S << 23) | (I1 << 22) | (I2 << 21) | (imm10 << 11) | imm11;
2032 int imm32 = SignExtend32<24>(tmp << 1);
2033 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
2034 true, 4, Inst, Decoder))
2035 Inst.addOperand(MCOperand::CreateImm(imm32));
2041 DecodeBranchImmInstruction(MCInst &Inst, unsigned Insn,
2042 uint64_t Address, const void *Decoder) {
2043 DecodeStatus S = MCDisassembler::Success;
2045 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2046 unsigned imm = fieldFromInstruction(Insn, 0, 24) << 2;
2049 Inst.setOpcode(ARM::BLXi);
2050 imm |= fieldFromInstruction(Insn, 24, 1) << 1;
2051 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2052 true, 4, Inst, Decoder))
2053 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2057 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2058 true, 4, Inst, Decoder))
2059 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2060 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2061 return MCDisassembler::Fail;
2067 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
2068 uint64_t Address, const void *Decoder) {
2069 DecodeStatus S = MCDisassembler::Success;
2071 unsigned Rm = fieldFromInstruction(Val, 0, 4);
2072 unsigned align = fieldFromInstruction(Val, 4, 2);
2074 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2075 return MCDisassembler::Fail;
2077 Inst.addOperand(MCOperand::CreateImm(0));
2079 Inst.addOperand(MCOperand::CreateImm(4 << align));
2084 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Insn,
2085 uint64_t Address, const void *Decoder) {
2086 DecodeStatus S = MCDisassembler::Success;
2088 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2089 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2090 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2091 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2092 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2093 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2095 // First output register
2096 switch (Inst.getOpcode()) {
2097 case ARM::VLD1q16: case ARM::VLD1q32: case ARM::VLD1q64: case ARM::VLD1q8:
2098 case ARM::VLD1q16wb_fixed: case ARM::VLD1q16wb_register:
2099 case ARM::VLD1q32wb_fixed: case ARM::VLD1q32wb_register:
2100 case ARM::VLD1q64wb_fixed: case ARM::VLD1q64wb_register:
2101 case ARM::VLD1q8wb_fixed: case ARM::VLD1q8wb_register:
2102 case ARM::VLD2d16: case ARM::VLD2d32: case ARM::VLD2d8:
2103 case ARM::VLD2d16wb_fixed: case ARM::VLD2d16wb_register:
2104 case ARM::VLD2d32wb_fixed: case ARM::VLD2d32wb_register:
2105 case ARM::VLD2d8wb_fixed: case ARM::VLD2d8wb_register:
2106 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2107 return MCDisassembler::Fail;
2112 case ARM::VLD2b16wb_fixed:
2113 case ARM::VLD2b16wb_register:
2114 case ARM::VLD2b32wb_fixed:
2115 case ARM::VLD2b32wb_register:
2116 case ARM::VLD2b8wb_fixed:
2117 case ARM::VLD2b8wb_register:
2118 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2119 return MCDisassembler::Fail;
2122 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2123 return MCDisassembler::Fail;
2126 // Second output register
2127 switch (Inst.getOpcode()) {
2131 case ARM::VLD3d8_UPD:
2132 case ARM::VLD3d16_UPD:
2133 case ARM::VLD3d32_UPD:
2137 case ARM::VLD4d8_UPD:
2138 case ARM::VLD4d16_UPD:
2139 case ARM::VLD4d32_UPD:
2140 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2141 return MCDisassembler::Fail;
2146 case ARM::VLD3q8_UPD:
2147 case ARM::VLD3q16_UPD:
2148 case ARM::VLD3q32_UPD:
2152 case ARM::VLD4q8_UPD:
2153 case ARM::VLD4q16_UPD:
2154 case ARM::VLD4q32_UPD:
2155 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2156 return MCDisassembler::Fail;
2161 // Third output register
2162 switch(Inst.getOpcode()) {
2166 case ARM::VLD3d8_UPD:
2167 case ARM::VLD3d16_UPD:
2168 case ARM::VLD3d32_UPD:
2172 case ARM::VLD4d8_UPD:
2173 case ARM::VLD4d16_UPD:
2174 case ARM::VLD4d32_UPD:
2175 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2176 return MCDisassembler::Fail;
2181 case ARM::VLD3q8_UPD:
2182 case ARM::VLD3q16_UPD:
2183 case ARM::VLD3q32_UPD:
2187 case ARM::VLD4q8_UPD:
2188 case ARM::VLD4q16_UPD:
2189 case ARM::VLD4q32_UPD:
2190 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2191 return MCDisassembler::Fail;
2197 // Fourth output register
2198 switch (Inst.getOpcode()) {
2202 case ARM::VLD4d8_UPD:
2203 case ARM::VLD4d16_UPD:
2204 case ARM::VLD4d32_UPD:
2205 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2206 return MCDisassembler::Fail;
2211 case ARM::VLD4q8_UPD:
2212 case ARM::VLD4q16_UPD:
2213 case ARM::VLD4q32_UPD:
2214 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2215 return MCDisassembler::Fail;
2221 // Writeback operand
2222 switch (Inst.getOpcode()) {
2223 case ARM::VLD1d8wb_fixed:
2224 case ARM::VLD1d16wb_fixed:
2225 case ARM::VLD1d32wb_fixed:
2226 case ARM::VLD1d64wb_fixed:
2227 case ARM::VLD1d8wb_register:
2228 case ARM::VLD1d16wb_register:
2229 case ARM::VLD1d32wb_register:
2230 case ARM::VLD1d64wb_register:
2231 case ARM::VLD1q8wb_fixed:
2232 case ARM::VLD1q16wb_fixed:
2233 case ARM::VLD1q32wb_fixed:
2234 case ARM::VLD1q64wb_fixed:
2235 case ARM::VLD1q8wb_register:
2236 case ARM::VLD1q16wb_register:
2237 case ARM::VLD1q32wb_register:
2238 case ARM::VLD1q64wb_register:
2239 case ARM::VLD1d8Twb_fixed:
2240 case ARM::VLD1d8Twb_register:
2241 case ARM::VLD1d16Twb_fixed:
2242 case ARM::VLD1d16Twb_register:
2243 case ARM::VLD1d32Twb_fixed:
2244 case ARM::VLD1d32Twb_register:
2245 case ARM::VLD1d64Twb_fixed:
2246 case ARM::VLD1d64Twb_register:
2247 case ARM::VLD1d8Qwb_fixed:
2248 case ARM::VLD1d8Qwb_register:
2249 case ARM::VLD1d16Qwb_fixed:
2250 case ARM::VLD1d16Qwb_register:
2251 case ARM::VLD1d32Qwb_fixed:
2252 case ARM::VLD1d32Qwb_register:
2253 case ARM::VLD1d64Qwb_fixed:
2254 case ARM::VLD1d64Qwb_register:
2255 case ARM::VLD2d8wb_fixed:
2256 case ARM::VLD2d16wb_fixed:
2257 case ARM::VLD2d32wb_fixed:
2258 case ARM::VLD2q8wb_fixed:
2259 case ARM::VLD2q16wb_fixed:
2260 case ARM::VLD2q32wb_fixed:
2261 case ARM::VLD2d8wb_register:
2262 case ARM::VLD2d16wb_register:
2263 case ARM::VLD2d32wb_register:
2264 case ARM::VLD2q8wb_register:
2265 case ARM::VLD2q16wb_register:
2266 case ARM::VLD2q32wb_register:
2267 case ARM::VLD2b8wb_fixed:
2268 case ARM::VLD2b16wb_fixed:
2269 case ARM::VLD2b32wb_fixed:
2270 case ARM::VLD2b8wb_register:
2271 case ARM::VLD2b16wb_register:
2272 case ARM::VLD2b32wb_register:
2273 Inst.addOperand(MCOperand::CreateImm(0));
2275 case ARM::VLD3d8_UPD:
2276 case ARM::VLD3d16_UPD:
2277 case ARM::VLD3d32_UPD:
2278 case ARM::VLD3q8_UPD:
2279 case ARM::VLD3q16_UPD:
2280 case ARM::VLD3q32_UPD:
2281 case ARM::VLD4d8_UPD:
2282 case ARM::VLD4d16_UPD:
2283 case ARM::VLD4d32_UPD:
2284 case ARM::VLD4q8_UPD:
2285 case ARM::VLD4q16_UPD:
2286 case ARM::VLD4q32_UPD:
2287 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2288 return MCDisassembler::Fail;
2294 // AddrMode6 Base (register+alignment)
2295 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2296 return MCDisassembler::Fail;
2298 // AddrMode6 Offset (register)
2299 switch (Inst.getOpcode()) {
2301 // The below have been updated to have explicit am6offset split
2302 // between fixed and register offset. For those instructions not
2303 // yet updated, we need to add an additional reg0 operand for the
2306 // The fixed offset encodes as Rm == 0xd, so we check for that.
2308 Inst.addOperand(MCOperand::CreateReg(0));
2311 // Fall through to handle the register offset variant.
2312 case ARM::VLD1d8wb_fixed:
2313 case ARM::VLD1d16wb_fixed:
2314 case ARM::VLD1d32wb_fixed:
2315 case ARM::VLD1d64wb_fixed:
2316 case ARM::VLD1d8Twb_fixed:
2317 case ARM::VLD1d16Twb_fixed:
2318 case ARM::VLD1d32Twb_fixed:
2319 case ARM::VLD1d64Twb_fixed:
2320 case ARM::VLD1d8Qwb_fixed:
2321 case ARM::VLD1d16Qwb_fixed:
2322 case ARM::VLD1d32Qwb_fixed:
2323 case ARM::VLD1d64Qwb_fixed:
2324 case ARM::VLD1d8wb_register:
2325 case ARM::VLD1d16wb_register:
2326 case ARM::VLD1d32wb_register:
2327 case ARM::VLD1d64wb_register:
2328 case ARM::VLD1q8wb_fixed:
2329 case ARM::VLD1q16wb_fixed:
2330 case ARM::VLD1q32wb_fixed:
2331 case ARM::VLD1q64wb_fixed:
2332 case ARM::VLD1q8wb_register:
2333 case ARM::VLD1q16wb_register:
2334 case ARM::VLD1q32wb_register:
2335 case ARM::VLD1q64wb_register:
2336 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2337 // variant encodes Rm == 0xf. Anything else is a register offset post-
2338 // increment and we need to add the register operand to the instruction.
2339 if (Rm != 0xD && Rm != 0xF &&
2340 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2341 return MCDisassembler::Fail;
2343 case ARM::VLD2d8wb_fixed:
2344 case ARM::VLD2d16wb_fixed:
2345 case ARM::VLD2d32wb_fixed:
2346 case ARM::VLD2b8wb_fixed:
2347 case ARM::VLD2b16wb_fixed:
2348 case ARM::VLD2b32wb_fixed:
2349 case ARM::VLD2q8wb_fixed:
2350 case ARM::VLD2q16wb_fixed:
2351 case ARM::VLD2q32wb_fixed:
2358 static DecodeStatus DecodeVST1Instruction(MCInst& Inst, unsigned Insn,
2359 uint64_t Addr, const void* Decoder) {
2360 unsigned type = fieldFromInstruction(Insn, 8, 4);
2361 unsigned align = fieldFromInstruction(Insn, 4, 2);
2362 if(type == 7 && (align & 2)) return MCDisassembler::Fail;
2363 if(type == 10 && align == 3) return MCDisassembler::Fail;
2364 if(type == 6 && (align & 2)) return MCDisassembler::Fail;
2366 return DecodeVSTInstruction(Inst, Insn, Addr, Decoder);
2369 static DecodeStatus DecodeVST2Instruction(MCInst& Inst, unsigned Insn,
2370 uint64_t Addr, const void* Decoder) {
2371 unsigned size = fieldFromInstruction(Insn, 6, 2);
2372 if(size == 3) return MCDisassembler::Fail;
2374 unsigned type = fieldFromInstruction(Insn, 8, 4);
2375 unsigned align = fieldFromInstruction(Insn, 4, 2);
2376 if(type == 8 && align == 3) return MCDisassembler::Fail;
2377 if(type == 9 && align == 3) return MCDisassembler::Fail;
2379 return DecodeVSTInstruction(Inst, Insn, Addr, Decoder);
2382 static DecodeStatus DecodeVST3Instruction(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 align = fieldFromInstruction(Insn, 4, 2);
2388 if(align & 2) return MCDisassembler::Fail;
2390 return DecodeVSTInstruction(Inst, Insn, Addr, Decoder);
2393 static DecodeStatus DecodeVST4Instruction(MCInst& Inst, unsigned Insn,
2394 uint64_t Addr, const void* Decoder) {
2395 unsigned size = fieldFromInstruction(Insn, 6, 2);
2396 if(size == 3) return MCDisassembler::Fail;
2398 return DecodeVSTInstruction(Inst, Insn, Addr, Decoder);
2401 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Insn,
2402 uint64_t Address, const void *Decoder) {
2403 DecodeStatus S = MCDisassembler::Success;
2405 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2406 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2407 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2408 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2409 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2410 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2412 // Writeback Operand
2413 switch (Inst.getOpcode()) {
2414 case ARM::VST1d8wb_fixed:
2415 case ARM::VST1d16wb_fixed:
2416 case ARM::VST1d32wb_fixed:
2417 case ARM::VST1d64wb_fixed:
2418 case ARM::VST1d8wb_register:
2419 case ARM::VST1d16wb_register:
2420 case ARM::VST1d32wb_register:
2421 case ARM::VST1d64wb_register:
2422 case ARM::VST1q8wb_fixed:
2423 case ARM::VST1q16wb_fixed:
2424 case ARM::VST1q32wb_fixed:
2425 case ARM::VST1q64wb_fixed:
2426 case ARM::VST1q8wb_register:
2427 case ARM::VST1q16wb_register:
2428 case ARM::VST1q32wb_register:
2429 case ARM::VST1q64wb_register:
2430 case ARM::VST1d8Twb_fixed:
2431 case ARM::VST1d16Twb_fixed:
2432 case ARM::VST1d32Twb_fixed:
2433 case ARM::VST1d64Twb_fixed:
2434 case ARM::VST1d8Twb_register:
2435 case ARM::VST1d16Twb_register:
2436 case ARM::VST1d32Twb_register:
2437 case ARM::VST1d64Twb_register:
2438 case ARM::VST1d8Qwb_fixed:
2439 case ARM::VST1d16Qwb_fixed:
2440 case ARM::VST1d32Qwb_fixed:
2441 case ARM::VST1d64Qwb_fixed:
2442 case ARM::VST1d8Qwb_register:
2443 case ARM::VST1d16Qwb_register:
2444 case ARM::VST1d32Qwb_register:
2445 case ARM::VST1d64Qwb_register:
2446 case ARM::VST2d8wb_fixed:
2447 case ARM::VST2d16wb_fixed:
2448 case ARM::VST2d32wb_fixed:
2449 case ARM::VST2d8wb_register:
2450 case ARM::VST2d16wb_register:
2451 case ARM::VST2d32wb_register:
2452 case ARM::VST2q8wb_fixed:
2453 case ARM::VST2q16wb_fixed:
2454 case ARM::VST2q32wb_fixed:
2455 case ARM::VST2q8wb_register:
2456 case ARM::VST2q16wb_register:
2457 case ARM::VST2q32wb_register:
2458 case ARM::VST2b8wb_fixed:
2459 case ARM::VST2b16wb_fixed:
2460 case ARM::VST2b32wb_fixed:
2461 case ARM::VST2b8wb_register:
2462 case ARM::VST2b16wb_register:
2463 case ARM::VST2b32wb_register:
2465 return MCDisassembler::Fail;
2466 Inst.addOperand(MCOperand::CreateImm(0));
2468 case ARM::VST3d8_UPD:
2469 case ARM::VST3d16_UPD:
2470 case ARM::VST3d32_UPD:
2471 case ARM::VST3q8_UPD:
2472 case ARM::VST3q16_UPD:
2473 case ARM::VST3q32_UPD:
2474 case ARM::VST4d8_UPD:
2475 case ARM::VST4d16_UPD:
2476 case ARM::VST4d32_UPD:
2477 case ARM::VST4q8_UPD:
2478 case ARM::VST4q16_UPD:
2479 case ARM::VST4q32_UPD:
2480 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2481 return MCDisassembler::Fail;
2487 // AddrMode6 Base (register+alignment)
2488 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2489 return MCDisassembler::Fail;
2491 // AddrMode6 Offset (register)
2492 switch (Inst.getOpcode()) {
2495 Inst.addOperand(MCOperand::CreateReg(0));
2496 else if (Rm != 0xF) {
2497 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2498 return MCDisassembler::Fail;
2501 case ARM::VST1d8wb_fixed:
2502 case ARM::VST1d16wb_fixed:
2503 case ARM::VST1d32wb_fixed:
2504 case ARM::VST1d64wb_fixed:
2505 case ARM::VST1q8wb_fixed:
2506 case ARM::VST1q16wb_fixed:
2507 case ARM::VST1q32wb_fixed:
2508 case ARM::VST1q64wb_fixed:
2509 case ARM::VST1d8Twb_fixed:
2510 case ARM::VST1d16Twb_fixed:
2511 case ARM::VST1d32Twb_fixed:
2512 case ARM::VST1d64Twb_fixed:
2513 case ARM::VST1d8Qwb_fixed:
2514 case ARM::VST1d16Qwb_fixed:
2515 case ARM::VST1d32Qwb_fixed:
2516 case ARM::VST1d64Qwb_fixed:
2517 case ARM::VST2d8wb_fixed:
2518 case ARM::VST2d16wb_fixed:
2519 case ARM::VST2d32wb_fixed:
2520 case ARM::VST2q8wb_fixed:
2521 case ARM::VST2q16wb_fixed:
2522 case ARM::VST2q32wb_fixed:
2523 case ARM::VST2b8wb_fixed:
2524 case ARM::VST2b16wb_fixed:
2525 case ARM::VST2b32wb_fixed:
2530 // First input register
2531 switch (Inst.getOpcode()) {
2536 case ARM::VST1q16wb_fixed:
2537 case ARM::VST1q16wb_register:
2538 case ARM::VST1q32wb_fixed:
2539 case ARM::VST1q32wb_register:
2540 case ARM::VST1q64wb_fixed:
2541 case ARM::VST1q64wb_register:
2542 case ARM::VST1q8wb_fixed:
2543 case ARM::VST1q8wb_register:
2547 case ARM::VST2d16wb_fixed:
2548 case ARM::VST2d16wb_register:
2549 case ARM::VST2d32wb_fixed:
2550 case ARM::VST2d32wb_register:
2551 case ARM::VST2d8wb_fixed:
2552 case ARM::VST2d8wb_register:
2553 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2554 return MCDisassembler::Fail;
2559 case ARM::VST2b16wb_fixed:
2560 case ARM::VST2b16wb_register:
2561 case ARM::VST2b32wb_fixed:
2562 case ARM::VST2b32wb_register:
2563 case ARM::VST2b8wb_fixed:
2564 case ARM::VST2b8wb_register:
2565 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2566 return MCDisassembler::Fail;
2569 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2570 return MCDisassembler::Fail;
2573 // Second input register
2574 switch (Inst.getOpcode()) {
2578 case ARM::VST3d8_UPD:
2579 case ARM::VST3d16_UPD:
2580 case ARM::VST3d32_UPD:
2584 case ARM::VST4d8_UPD:
2585 case ARM::VST4d16_UPD:
2586 case ARM::VST4d32_UPD:
2587 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2588 return MCDisassembler::Fail;
2593 case ARM::VST3q8_UPD:
2594 case ARM::VST3q16_UPD:
2595 case ARM::VST3q32_UPD:
2599 case ARM::VST4q8_UPD:
2600 case ARM::VST4q16_UPD:
2601 case ARM::VST4q32_UPD:
2602 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2603 return MCDisassembler::Fail;
2609 // Third input register
2610 switch (Inst.getOpcode()) {
2614 case ARM::VST3d8_UPD:
2615 case ARM::VST3d16_UPD:
2616 case ARM::VST3d32_UPD:
2620 case ARM::VST4d8_UPD:
2621 case ARM::VST4d16_UPD:
2622 case ARM::VST4d32_UPD:
2623 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2624 return MCDisassembler::Fail;
2629 case ARM::VST3q8_UPD:
2630 case ARM::VST3q16_UPD:
2631 case ARM::VST3q32_UPD:
2635 case ARM::VST4q8_UPD:
2636 case ARM::VST4q16_UPD:
2637 case ARM::VST4q32_UPD:
2638 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2639 return MCDisassembler::Fail;
2645 // Fourth input register
2646 switch (Inst.getOpcode()) {
2650 case ARM::VST4d8_UPD:
2651 case ARM::VST4d16_UPD:
2652 case ARM::VST4d32_UPD:
2653 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2654 return MCDisassembler::Fail;
2659 case ARM::VST4q8_UPD:
2660 case ARM::VST4q16_UPD:
2661 case ARM::VST4q32_UPD:
2662 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2663 return MCDisassembler::Fail;
2672 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Insn,
2673 uint64_t Address, const void *Decoder) {
2674 DecodeStatus S = MCDisassembler::Success;
2676 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2677 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2678 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2679 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2680 unsigned align = fieldFromInstruction(Insn, 4, 1);
2681 unsigned size = fieldFromInstruction(Insn, 6, 2);
2683 if (size == 0 && align == 1)
2684 return MCDisassembler::Fail;
2685 align *= (1 << size);
2687 switch (Inst.getOpcode()) {
2688 case ARM::VLD1DUPq16: case ARM::VLD1DUPq32: case ARM::VLD1DUPq8:
2689 case ARM::VLD1DUPq16wb_fixed: case ARM::VLD1DUPq16wb_register:
2690 case ARM::VLD1DUPq32wb_fixed: case ARM::VLD1DUPq32wb_register:
2691 case ARM::VLD1DUPq8wb_fixed: case ARM::VLD1DUPq8wb_register:
2692 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2693 return MCDisassembler::Fail;
2696 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2697 return MCDisassembler::Fail;
2701 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2702 return MCDisassembler::Fail;
2705 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2706 return MCDisassembler::Fail;
2707 Inst.addOperand(MCOperand::CreateImm(align));
2709 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2710 // variant encodes Rm == 0xf. Anything else is a register offset post-
2711 // increment and we need to add the register operand to the instruction.
2712 if (Rm != 0xD && Rm != 0xF &&
2713 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2714 return MCDisassembler::Fail;
2719 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Insn,
2720 uint64_t Address, const void *Decoder) {
2721 DecodeStatus S = MCDisassembler::Success;
2723 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2724 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2725 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2726 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2727 unsigned align = fieldFromInstruction(Insn, 4, 1);
2728 unsigned size = 1 << fieldFromInstruction(Insn, 6, 2);
2731 switch (Inst.getOpcode()) {
2732 case ARM::VLD2DUPd16: case ARM::VLD2DUPd32: case ARM::VLD2DUPd8:
2733 case ARM::VLD2DUPd16wb_fixed: case ARM::VLD2DUPd16wb_register:
2734 case ARM::VLD2DUPd32wb_fixed: case ARM::VLD2DUPd32wb_register:
2735 case ARM::VLD2DUPd8wb_fixed: case ARM::VLD2DUPd8wb_register:
2736 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2737 return MCDisassembler::Fail;
2739 case ARM::VLD2DUPd16x2: case ARM::VLD2DUPd32x2: case ARM::VLD2DUPd8x2:
2740 case ARM::VLD2DUPd16x2wb_fixed: case ARM::VLD2DUPd16x2wb_register:
2741 case ARM::VLD2DUPd32x2wb_fixed: case ARM::VLD2DUPd32x2wb_register:
2742 case ARM::VLD2DUPd8x2wb_fixed: case ARM::VLD2DUPd8x2wb_register:
2743 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2744 return MCDisassembler::Fail;
2747 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2748 return MCDisassembler::Fail;
2753 Inst.addOperand(MCOperand::CreateImm(0));
2755 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2756 return MCDisassembler::Fail;
2757 Inst.addOperand(MCOperand::CreateImm(align));
2759 if (Rm != 0xD && Rm != 0xF) {
2760 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2761 return MCDisassembler::Fail;
2767 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Insn,
2768 uint64_t Address, const void *Decoder) {
2769 DecodeStatus S = MCDisassembler::Success;
2771 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2772 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2773 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2774 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2775 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
2777 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2778 return MCDisassembler::Fail;
2779 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2780 return MCDisassembler::Fail;
2781 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2782 return MCDisassembler::Fail;
2784 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2785 return MCDisassembler::Fail;
2788 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2789 return MCDisassembler::Fail;
2790 Inst.addOperand(MCOperand::CreateImm(0));
2793 Inst.addOperand(MCOperand::CreateReg(0));
2794 else if (Rm != 0xF) {
2795 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2796 return MCDisassembler::Fail;
2802 static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Insn,
2803 uint64_t Address, const void *Decoder) {
2804 DecodeStatus S = MCDisassembler::Success;
2806 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2807 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2808 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2809 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2810 unsigned size = fieldFromInstruction(Insn, 6, 2);
2811 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
2812 unsigned align = fieldFromInstruction(Insn, 4, 1);
2816 return MCDisassembler::Fail;
2829 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2830 return MCDisassembler::Fail;
2831 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2832 return MCDisassembler::Fail;
2833 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2834 return MCDisassembler::Fail;
2835 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
2836 return MCDisassembler::Fail;
2838 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2839 return MCDisassembler::Fail;
2842 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2843 return MCDisassembler::Fail;
2844 Inst.addOperand(MCOperand::CreateImm(align));
2847 Inst.addOperand(MCOperand::CreateReg(0));
2848 else if (Rm != 0xF) {
2849 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2850 return MCDisassembler::Fail;
2857 DecodeNEONModImmInstruction(MCInst &Inst, unsigned Insn,
2858 uint64_t Address, const void *Decoder) {
2859 DecodeStatus S = MCDisassembler::Success;
2861 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2862 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2863 unsigned imm = fieldFromInstruction(Insn, 0, 4);
2864 imm |= fieldFromInstruction(Insn, 16, 3) << 4;
2865 imm |= fieldFromInstruction(Insn, 24, 1) << 7;
2866 imm |= fieldFromInstruction(Insn, 8, 4) << 8;
2867 imm |= fieldFromInstruction(Insn, 5, 1) << 12;
2868 unsigned Q = fieldFromInstruction(Insn, 6, 1);
2871 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2872 return MCDisassembler::Fail;
2874 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2875 return MCDisassembler::Fail;
2878 Inst.addOperand(MCOperand::CreateImm(imm));
2880 switch (Inst.getOpcode()) {
2881 case ARM::VORRiv4i16:
2882 case ARM::VORRiv2i32:
2883 case ARM::VBICiv4i16:
2884 case ARM::VBICiv2i32:
2885 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2886 return MCDisassembler::Fail;
2888 case ARM::VORRiv8i16:
2889 case ARM::VORRiv4i32:
2890 case ARM::VBICiv8i16:
2891 case ARM::VBICiv4i32:
2892 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2893 return MCDisassembler::Fail;
2902 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Insn,
2903 uint64_t Address, const void *Decoder) {
2904 DecodeStatus S = MCDisassembler::Success;
2906 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2907 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2908 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2909 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
2910 unsigned size = fieldFromInstruction(Insn, 18, 2);
2912 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2913 return MCDisassembler::Fail;
2914 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2915 return MCDisassembler::Fail;
2916 Inst.addOperand(MCOperand::CreateImm(8 << size));
2921 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
2922 uint64_t Address, const void *Decoder) {
2923 Inst.addOperand(MCOperand::CreateImm(8 - Val));
2924 return MCDisassembler::Success;
2927 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
2928 uint64_t Address, const void *Decoder) {
2929 Inst.addOperand(MCOperand::CreateImm(16 - Val));
2930 return MCDisassembler::Success;
2933 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
2934 uint64_t Address, const void *Decoder) {
2935 Inst.addOperand(MCOperand::CreateImm(32 - Val));
2936 return MCDisassembler::Success;
2939 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
2940 uint64_t Address, const void *Decoder) {
2941 Inst.addOperand(MCOperand::CreateImm(64 - Val));
2942 return MCDisassembler::Success;
2945 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
2946 uint64_t Address, const void *Decoder) {
2947 DecodeStatus S = MCDisassembler::Success;
2949 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2950 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2951 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2952 Rn |= fieldFromInstruction(Insn, 7, 1) << 4;
2953 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2954 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
2955 unsigned op = fieldFromInstruction(Insn, 6, 1);
2957 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2958 return MCDisassembler::Fail;
2960 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2961 return MCDisassembler::Fail; // Writeback
2964 switch (Inst.getOpcode()) {
2967 if (!Check(S, DecodeDPairRegisterClass(Inst, Rn, Address, Decoder)))
2968 return MCDisassembler::Fail;
2971 if (!Check(S, DecodeDPRRegisterClass(Inst, Rn, Address, Decoder)))
2972 return MCDisassembler::Fail;
2975 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2976 return MCDisassembler::Fail;
2981 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
2982 uint64_t Address, const void *Decoder) {
2983 DecodeStatus S = MCDisassembler::Success;
2985 unsigned dst = fieldFromInstruction(Insn, 8, 3);
2986 unsigned imm = fieldFromInstruction(Insn, 0, 8);
2988 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
2989 return MCDisassembler::Fail;
2991 switch(Inst.getOpcode()) {
2993 return MCDisassembler::Fail;
2995 break; // tADR does not explicitly represent the PC as an operand.
2997 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3001 Inst.addOperand(MCOperand::CreateImm(imm));
3005 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
3006 uint64_t Address, const void *Decoder) {
3007 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<12>(Val<<1) + 4,
3008 true, 2, Inst, Decoder))
3009 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
3010 return MCDisassembler::Success;
3013 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
3014 uint64_t Address, const void *Decoder) {
3015 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<21>(Val) + 4,
3016 true, 4, Inst, Decoder))
3017 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
3018 return MCDisassembler::Success;
3021 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
3022 uint64_t Address, const void *Decoder) {
3023 if (!tryAddingSymbolicOperand(Address, Address + (Val<<1) + 4,
3024 true, 2, Inst, Decoder))
3025 Inst.addOperand(MCOperand::CreateImm(Val << 1));
3026 return MCDisassembler::Success;
3029 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
3030 uint64_t Address, const void *Decoder) {
3031 DecodeStatus S = MCDisassembler::Success;
3033 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3034 unsigned Rm = fieldFromInstruction(Val, 3, 3);
3036 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3037 return MCDisassembler::Fail;
3038 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
3039 return MCDisassembler::Fail;
3044 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
3045 uint64_t Address, const void *Decoder) {
3046 DecodeStatus S = MCDisassembler::Success;
3048 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3049 unsigned imm = fieldFromInstruction(Val, 3, 5);
3051 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3052 return MCDisassembler::Fail;
3053 Inst.addOperand(MCOperand::CreateImm(imm));
3058 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
3059 uint64_t Address, const void *Decoder) {
3060 unsigned imm = Val << 2;
3062 Inst.addOperand(MCOperand::CreateImm(imm));
3063 tryAddingPcLoadReferenceComment(Address, (Address & ~2u) + imm + 4, Decoder);
3065 return MCDisassembler::Success;
3068 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
3069 uint64_t Address, const void *Decoder) {
3070 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3071 Inst.addOperand(MCOperand::CreateImm(Val));
3073 return MCDisassembler::Success;
3076 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
3077 uint64_t Address, const void *Decoder) {
3078 DecodeStatus S = MCDisassembler::Success;
3080 unsigned Rn = fieldFromInstruction(Val, 6, 4);
3081 unsigned Rm = fieldFromInstruction(Val, 2, 4);
3082 unsigned imm = fieldFromInstruction(Val, 0, 2);
3084 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3085 return MCDisassembler::Fail;
3086 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3087 return MCDisassembler::Fail;
3088 Inst.addOperand(MCOperand::CreateImm(imm));
3093 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Insn,
3094 uint64_t Address, const void *Decoder) {
3095 DecodeStatus S = MCDisassembler::Success;
3097 switch (Inst.getOpcode()) {
3103 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3104 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3105 return MCDisassembler::Fail;
3109 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3111 switch (Inst.getOpcode()) {
3113 Inst.setOpcode(ARM::t2LDRBpci);
3116 Inst.setOpcode(ARM::t2LDRHpci);
3119 Inst.setOpcode(ARM::t2LDRSHpci);
3122 Inst.setOpcode(ARM::t2LDRSBpci);
3125 Inst.setOpcode(ARM::t2PLDi12);
3126 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
3129 return MCDisassembler::Fail;
3132 int imm = fieldFromInstruction(Insn, 0, 12);
3133 if (!fieldFromInstruction(Insn, 23, 1)) imm *= -1;
3134 Inst.addOperand(MCOperand::CreateImm(imm));
3139 unsigned addrmode = fieldFromInstruction(Insn, 4, 2);
3140 addrmode |= fieldFromInstruction(Insn, 0, 4) << 2;
3141 addrmode |= fieldFromInstruction(Insn, 16, 4) << 6;
3142 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
3143 return MCDisassembler::Fail;
3148 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
3149 uint64_t Address, const void *Decoder) {
3151 Inst.addOperand(MCOperand::CreateImm(INT32_MIN));
3153 int imm = Val & 0xFF;
3155 if (!(Val & 0x100)) imm *= -1;
3156 Inst.addOperand(MCOperand::CreateImm(imm * 4));
3159 return MCDisassembler::Success;
3162 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
3163 uint64_t Address, const void *Decoder) {
3164 DecodeStatus S = MCDisassembler::Success;
3166 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3167 unsigned imm = fieldFromInstruction(Val, 0, 9);
3169 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3170 return MCDisassembler::Fail;
3171 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
3172 return MCDisassembler::Fail;
3177 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
3178 uint64_t Address, const void *Decoder) {
3179 DecodeStatus S = MCDisassembler::Success;
3181 unsigned Rn = fieldFromInstruction(Val, 8, 4);
3182 unsigned imm = fieldFromInstruction(Val, 0, 8);
3184 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
3185 return MCDisassembler::Fail;
3187 Inst.addOperand(MCOperand::CreateImm(imm));
3192 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
3193 uint64_t Address, const void *Decoder) {
3194 int imm = Val & 0xFF;
3197 else if (!(Val & 0x100))
3199 Inst.addOperand(MCOperand::CreateImm(imm));
3201 return MCDisassembler::Success;
3205 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
3206 uint64_t Address, const void *Decoder) {
3207 DecodeStatus S = MCDisassembler::Success;
3209 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3210 unsigned imm = fieldFromInstruction(Val, 0, 9);
3212 // Some instructions always use an additive offset.
3213 switch (Inst.getOpcode()) {
3228 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3229 return MCDisassembler::Fail;
3230 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
3231 return MCDisassembler::Fail;
3236 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Insn,
3237 uint64_t Address, const void *Decoder) {
3238 DecodeStatus S = MCDisassembler::Success;
3240 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3241 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3242 unsigned addr = fieldFromInstruction(Insn, 0, 8);
3243 addr |= fieldFromInstruction(Insn, 9, 1) << 8;
3245 unsigned load = fieldFromInstruction(Insn, 20, 1);
3248 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3249 return MCDisassembler::Fail;
3252 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3253 return MCDisassembler::Fail;
3256 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3257 return MCDisassembler::Fail;
3260 if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
3261 return MCDisassembler::Fail;
3266 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
3267 uint64_t Address, const void *Decoder) {
3268 DecodeStatus S = MCDisassembler::Success;
3270 unsigned Rn = fieldFromInstruction(Val, 13, 4);
3271 unsigned imm = fieldFromInstruction(Val, 0, 12);
3273 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3274 return MCDisassembler::Fail;
3275 Inst.addOperand(MCOperand::CreateImm(imm));
3281 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Insn,
3282 uint64_t Address, const void *Decoder) {
3283 unsigned imm = fieldFromInstruction(Insn, 0, 7);
3285 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3286 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3287 Inst.addOperand(MCOperand::CreateImm(imm));
3289 return MCDisassembler::Success;
3292 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
3293 uint64_t Address, const void *Decoder) {
3294 DecodeStatus S = MCDisassembler::Success;
3296 if (Inst.getOpcode() == ARM::tADDrSP) {
3297 unsigned Rdm = fieldFromInstruction(Insn, 0, 3);
3298 Rdm |= fieldFromInstruction(Insn, 7, 1) << 3;
3300 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3301 return MCDisassembler::Fail;
3302 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3303 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3304 return MCDisassembler::Fail;
3305 } else if (Inst.getOpcode() == ARM::tADDspr) {
3306 unsigned Rm = fieldFromInstruction(Insn, 3, 4);
3308 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3309 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3310 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3311 return MCDisassembler::Fail;
3317 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
3318 uint64_t Address, const void *Decoder) {
3319 unsigned imod = fieldFromInstruction(Insn, 4, 1) | 0x2;
3320 unsigned flags = fieldFromInstruction(Insn, 0, 3);
3322 Inst.addOperand(MCOperand::CreateImm(imod));
3323 Inst.addOperand(MCOperand::CreateImm(flags));
3325 return MCDisassembler::Success;
3328 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
3329 uint64_t Address, const void *Decoder) {
3330 DecodeStatus S = MCDisassembler::Success;
3331 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3332 unsigned add = fieldFromInstruction(Insn, 4, 1);
3334 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
3335 return MCDisassembler::Fail;
3336 Inst.addOperand(MCOperand::CreateImm(add));
3341 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Val,
3342 uint64_t Address, const void *Decoder) {
3343 // Val is passed in as S:J1:J2:imm10H:imm10L:'0'
3344 // Note only one trailing zero not two. Also the J1 and J2 values are from
3345 // the encoded instruction. So here change to I1 and I2 values via:
3346 // I1 = NOT(J1 EOR S);
3347 // I2 = NOT(J2 EOR S);
3348 // and build the imm32 with two trailing zeros as documented:
3349 // imm32 = SignExtend(S:I1:I2:imm10H:imm10L:'00', 32);
3350 unsigned S = (Val >> 23) & 1;
3351 unsigned J1 = (Val >> 22) & 1;
3352 unsigned J2 = (Val >> 21) & 1;
3353 unsigned I1 = !(J1 ^ S);
3354 unsigned I2 = !(J2 ^ S);
3355 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
3356 int imm32 = SignExtend32<25>(tmp << 1);
3358 if (!tryAddingSymbolicOperand(Address,
3359 (Address & ~2u) + imm32 + 4,
3360 true, 4, Inst, Decoder))
3361 Inst.addOperand(MCOperand::CreateImm(imm32));
3362 return MCDisassembler::Success;
3365 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Val,
3366 uint64_t Address, const void *Decoder) {
3367 if (Val == 0xA || Val == 0xB)
3368 return MCDisassembler::Fail;
3370 Inst.addOperand(MCOperand::CreateImm(Val));
3371 return MCDisassembler::Success;
3375 DecodeThumbTableBranch(MCInst &Inst, unsigned Insn,
3376 uint64_t Address, const void *Decoder) {
3377 DecodeStatus S = MCDisassembler::Success;
3379 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3380 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3382 if (Rn == ARM::SP) S = MCDisassembler::SoftFail;
3383 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3384 return MCDisassembler::Fail;
3385 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3386 return MCDisassembler::Fail;
3391 DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Insn,
3392 uint64_t Address, const void *Decoder) {
3393 DecodeStatus S = MCDisassembler::Success;
3395 unsigned pred = fieldFromInstruction(Insn, 22, 4);
3396 if (pred == 0xE || pred == 0xF) {
3397 unsigned opc = fieldFromInstruction(Insn, 4, 28);
3400 return MCDisassembler::Fail;
3402 Inst.setOpcode(ARM::t2DSB);
3405 Inst.setOpcode(ARM::t2DMB);
3408 Inst.setOpcode(ARM::t2ISB);
3412 unsigned imm = fieldFromInstruction(Insn, 0, 4);
3413 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
3416 unsigned brtarget = fieldFromInstruction(Insn, 0, 11) << 1;
3417 brtarget |= fieldFromInstruction(Insn, 11, 1) << 19;
3418 brtarget |= fieldFromInstruction(Insn, 13, 1) << 18;
3419 brtarget |= fieldFromInstruction(Insn, 16, 6) << 12;
3420 brtarget |= fieldFromInstruction(Insn, 26, 1) << 20;
3422 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
3423 return MCDisassembler::Fail;
3424 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3425 return MCDisassembler::Fail;
3430 // Decode a shifted immediate operand. These basically consist
3431 // of an 8-bit value, and a 4-bit directive that specifies either
3432 // a splat operation or a rotation.
3433 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
3434 uint64_t Address, const void *Decoder) {
3435 unsigned ctrl = fieldFromInstruction(Val, 10, 2);
3437 unsigned byte = fieldFromInstruction(Val, 8, 2);
3438 unsigned imm = fieldFromInstruction(Val, 0, 8);
3441 Inst.addOperand(MCOperand::CreateImm(imm));
3444 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
3447 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
3450 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
3455 unsigned unrot = fieldFromInstruction(Val, 0, 7) | 0x80;
3456 unsigned rot = fieldFromInstruction(Val, 7, 5);
3457 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
3458 Inst.addOperand(MCOperand::CreateImm(imm));
3461 return MCDisassembler::Success;
3465 DecodeThumbBCCTargetOperand(MCInst &Inst, unsigned Val,
3466 uint64_t Address, const void *Decoder){
3467 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<9>(Val<<1) + 4,
3468 true, 2, Inst, Decoder))
3469 Inst.addOperand(MCOperand::CreateImm(SignExtend32<9>(Val << 1)));
3470 return MCDisassembler::Success;
3473 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
3474 uint64_t Address, const void *Decoder){
3475 // Val is passed in as S:J1:J2:imm10:imm11
3476 // Note no trailing zero after imm11. Also the J1 and J2 values are from
3477 // the encoded instruction. So here change to I1 and I2 values via:
3478 // I1 = NOT(J1 EOR S);
3479 // I2 = NOT(J2 EOR S);
3480 // and build the imm32 with one trailing zero as documented:
3481 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
3482 unsigned S = (Val >> 23) & 1;
3483 unsigned J1 = (Val >> 22) & 1;
3484 unsigned J2 = (Val >> 21) & 1;
3485 unsigned I1 = !(J1 ^ S);
3486 unsigned I2 = !(J2 ^ S);
3487 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
3488 int imm32 = SignExtend32<25>(tmp << 1);
3490 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
3491 true, 4, Inst, Decoder))
3492 Inst.addOperand(MCOperand::CreateImm(imm32));
3493 return MCDisassembler::Success;
3496 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Val,
3497 uint64_t Address, const void *Decoder) {
3499 return MCDisassembler::Fail;
3501 Inst.addOperand(MCOperand::CreateImm(Val));
3502 return MCDisassembler::Success;
3505 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Val,
3506 uint64_t Address, const void *Decoder) {
3507 if (!Val) return MCDisassembler::Fail;
3508 Inst.addOperand(MCOperand::CreateImm(Val));
3509 return MCDisassembler::Success;
3512 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
3513 uint64_t Address, const void *Decoder) {
3514 DecodeStatus S = MCDisassembler::Success;
3516 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3517 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3518 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3520 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3522 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3523 return MCDisassembler::Fail;
3524 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3525 return MCDisassembler::Fail;
3526 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3527 return MCDisassembler::Fail;
3528 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3529 return MCDisassembler::Fail;
3535 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
3536 uint64_t Address, const void *Decoder){
3537 DecodeStatus S = MCDisassembler::Success;
3539 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3540 unsigned Rt = fieldFromInstruction(Insn, 0, 4);
3541 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3542 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3544 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
3545 return MCDisassembler::Fail;
3547 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3548 if (Rd == Rn || Rd == Rt || Rd == Rt+1) return MCDisassembler::Fail;
3550 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3551 return MCDisassembler::Fail;
3552 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3553 return MCDisassembler::Fail;
3554 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3555 return MCDisassembler::Fail;
3556 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3557 return MCDisassembler::Fail;
3562 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
3563 uint64_t Address, const void *Decoder) {
3564 DecodeStatus S = MCDisassembler::Success;
3566 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3567 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3568 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3569 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3570 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3571 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3573 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3575 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3576 return MCDisassembler::Fail;
3577 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3578 return MCDisassembler::Fail;
3579 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3580 return MCDisassembler::Fail;
3581 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3582 return MCDisassembler::Fail;
3587 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
3588 uint64_t Address, const void *Decoder) {
3589 DecodeStatus S = MCDisassembler::Success;
3591 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3592 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3593 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3594 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3595 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3596 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3597 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3599 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3600 if (Rm == 0xF) S = MCDisassembler::SoftFail;
3602 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3603 return MCDisassembler::Fail;
3604 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3605 return MCDisassembler::Fail;
3606 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3607 return MCDisassembler::Fail;
3608 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3609 return MCDisassembler::Fail;
3615 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
3616 uint64_t Address, const void *Decoder) {
3617 DecodeStatus S = MCDisassembler::Success;
3619 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3620 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3621 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3622 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3623 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3624 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3626 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3628 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3629 return MCDisassembler::Fail;
3630 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3631 return MCDisassembler::Fail;
3632 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3633 return MCDisassembler::Fail;
3634 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3635 return MCDisassembler::Fail;
3640 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
3641 uint64_t Address, const void *Decoder) {
3642 DecodeStatus S = MCDisassembler::Success;
3644 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3645 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3646 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3647 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3648 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3649 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3651 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3653 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3654 return MCDisassembler::Fail;
3655 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3656 return MCDisassembler::Fail;
3657 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3658 return MCDisassembler::Fail;
3659 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3660 return MCDisassembler::Fail;
3665 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
3666 uint64_t Address, const void *Decoder) {
3667 DecodeStatus S = MCDisassembler::Success;
3669 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3670 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3671 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3672 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3673 unsigned size = fieldFromInstruction(Insn, 10, 2);
3679 return MCDisassembler::Fail;
3681 if (fieldFromInstruction(Insn, 4, 1))
3682 return MCDisassembler::Fail; // UNDEFINED
3683 index = fieldFromInstruction(Insn, 5, 3);
3686 if (fieldFromInstruction(Insn, 5, 1))
3687 return MCDisassembler::Fail; // UNDEFINED
3688 index = fieldFromInstruction(Insn, 6, 2);
3689 if (fieldFromInstruction(Insn, 4, 1))
3693 if (fieldFromInstruction(Insn, 6, 1))
3694 return MCDisassembler::Fail; // UNDEFINED
3695 index = fieldFromInstruction(Insn, 7, 1);
3697 switch (fieldFromInstruction(Insn, 4, 2)) {
3703 return MCDisassembler::Fail;
3708 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3709 return MCDisassembler::Fail;
3710 if (Rm != 0xF) { // Writeback
3711 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3712 return MCDisassembler::Fail;
3714 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3715 return MCDisassembler::Fail;
3716 Inst.addOperand(MCOperand::CreateImm(align));
3719 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3720 return MCDisassembler::Fail;
3722 Inst.addOperand(MCOperand::CreateReg(0));
3725 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3726 return MCDisassembler::Fail;
3727 Inst.addOperand(MCOperand::CreateImm(index));
3732 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
3733 uint64_t Address, const void *Decoder) {
3734 DecodeStatus S = MCDisassembler::Success;
3736 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3737 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3738 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3739 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3740 unsigned size = fieldFromInstruction(Insn, 10, 2);
3746 return MCDisassembler::Fail;
3748 if (fieldFromInstruction(Insn, 4, 1))
3749 return MCDisassembler::Fail; // UNDEFINED
3750 index = fieldFromInstruction(Insn, 5, 3);
3753 if (fieldFromInstruction(Insn, 5, 1))
3754 return MCDisassembler::Fail; // UNDEFINED
3755 index = fieldFromInstruction(Insn, 6, 2);
3756 if (fieldFromInstruction(Insn, 4, 1))
3760 if (fieldFromInstruction(Insn, 6, 1))
3761 return MCDisassembler::Fail; // UNDEFINED
3762 index = fieldFromInstruction(Insn, 7, 1);
3764 switch (fieldFromInstruction(Insn, 4, 2)) {
3770 return MCDisassembler::Fail;
3775 if (Rm != 0xF) { // Writeback
3776 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3777 return MCDisassembler::Fail;
3779 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3780 return MCDisassembler::Fail;
3781 Inst.addOperand(MCOperand::CreateImm(align));
3784 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3785 return MCDisassembler::Fail;
3787 Inst.addOperand(MCOperand::CreateReg(0));
3790 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3791 return MCDisassembler::Fail;
3792 Inst.addOperand(MCOperand::CreateImm(index));
3798 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
3799 uint64_t Address, const void *Decoder) {
3800 DecodeStatus S = MCDisassembler::Success;
3802 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3803 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3804 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3805 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3806 unsigned size = fieldFromInstruction(Insn, 10, 2);
3813 return MCDisassembler::Fail;
3815 index = fieldFromInstruction(Insn, 5, 3);
3816 if (fieldFromInstruction(Insn, 4, 1))
3820 index = fieldFromInstruction(Insn, 6, 2);
3821 if (fieldFromInstruction(Insn, 4, 1))
3823 if (fieldFromInstruction(Insn, 5, 1))
3827 if (fieldFromInstruction(Insn, 5, 1))
3828 return MCDisassembler::Fail; // UNDEFINED
3829 index = fieldFromInstruction(Insn, 7, 1);
3830 if (fieldFromInstruction(Insn, 4, 1) != 0)
3832 if (fieldFromInstruction(Insn, 6, 1))
3837 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3838 return MCDisassembler::Fail;
3839 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3840 return MCDisassembler::Fail;
3841 if (Rm != 0xF) { // Writeback
3842 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3843 return MCDisassembler::Fail;
3845 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3846 return MCDisassembler::Fail;
3847 Inst.addOperand(MCOperand::CreateImm(align));
3850 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3851 return MCDisassembler::Fail;
3853 Inst.addOperand(MCOperand::CreateReg(0));
3856 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3857 return MCDisassembler::Fail;
3858 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3859 return MCDisassembler::Fail;
3860 Inst.addOperand(MCOperand::CreateImm(index));
3865 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
3866 uint64_t Address, const void *Decoder) {
3867 DecodeStatus S = MCDisassembler::Success;
3869 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3870 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3871 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3872 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3873 unsigned size = fieldFromInstruction(Insn, 10, 2);
3880 return MCDisassembler::Fail;
3882 index = fieldFromInstruction(Insn, 5, 3);
3883 if (fieldFromInstruction(Insn, 4, 1))
3887 index = fieldFromInstruction(Insn, 6, 2);
3888 if (fieldFromInstruction(Insn, 4, 1))
3890 if (fieldFromInstruction(Insn, 5, 1))
3894 if (fieldFromInstruction(Insn, 5, 1))
3895 return MCDisassembler::Fail; // UNDEFINED
3896 index = fieldFromInstruction(Insn, 7, 1);
3897 if (fieldFromInstruction(Insn, 4, 1) != 0)
3899 if (fieldFromInstruction(Insn, 6, 1))
3904 if (Rm != 0xF) { // Writeback
3905 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3906 return MCDisassembler::Fail;
3908 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3909 return MCDisassembler::Fail;
3910 Inst.addOperand(MCOperand::CreateImm(align));
3913 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3914 return MCDisassembler::Fail;
3916 Inst.addOperand(MCOperand::CreateReg(0));
3919 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3920 return MCDisassembler::Fail;
3921 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3922 return MCDisassembler::Fail;
3923 Inst.addOperand(MCOperand::CreateImm(index));
3929 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
3930 uint64_t Address, const void *Decoder) {
3931 DecodeStatus S = MCDisassembler::Success;
3933 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3934 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3935 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3936 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3937 unsigned size = fieldFromInstruction(Insn, 10, 2);
3944 return MCDisassembler::Fail;
3946 if (fieldFromInstruction(Insn, 4, 1))
3947 return MCDisassembler::Fail; // UNDEFINED
3948 index = fieldFromInstruction(Insn, 5, 3);
3951 if (fieldFromInstruction(Insn, 4, 1))
3952 return MCDisassembler::Fail; // UNDEFINED
3953 index = fieldFromInstruction(Insn, 6, 2);
3954 if (fieldFromInstruction(Insn, 5, 1))
3958 if (fieldFromInstruction(Insn, 4, 2))
3959 return MCDisassembler::Fail; // UNDEFINED
3960 index = fieldFromInstruction(Insn, 7, 1);
3961 if (fieldFromInstruction(Insn, 6, 1))
3966 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3967 return MCDisassembler::Fail;
3968 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3969 return MCDisassembler::Fail;
3970 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3971 return MCDisassembler::Fail;
3973 if (Rm != 0xF) { // Writeback
3974 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3975 return MCDisassembler::Fail;
3977 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3978 return MCDisassembler::Fail;
3979 Inst.addOperand(MCOperand::CreateImm(align));
3982 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3983 return MCDisassembler::Fail;
3985 Inst.addOperand(MCOperand::CreateReg(0));
3988 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3989 return MCDisassembler::Fail;
3990 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3991 return MCDisassembler::Fail;
3992 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3993 return MCDisassembler::Fail;
3994 Inst.addOperand(MCOperand::CreateImm(index));
3999 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
4000 uint64_t Address, const void *Decoder) {
4001 DecodeStatus S = MCDisassembler::Success;
4003 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4004 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4005 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4006 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4007 unsigned size = fieldFromInstruction(Insn, 10, 2);
4014 return MCDisassembler::Fail;
4016 if (fieldFromInstruction(Insn, 4, 1))
4017 return MCDisassembler::Fail; // UNDEFINED
4018 index = fieldFromInstruction(Insn, 5, 3);
4021 if (fieldFromInstruction(Insn, 4, 1))
4022 return MCDisassembler::Fail; // UNDEFINED
4023 index = fieldFromInstruction(Insn, 6, 2);
4024 if (fieldFromInstruction(Insn, 5, 1))
4028 if (fieldFromInstruction(Insn, 4, 2))
4029 return MCDisassembler::Fail; // UNDEFINED
4030 index = fieldFromInstruction(Insn, 7, 1);
4031 if (fieldFromInstruction(Insn, 6, 1))
4036 if (Rm != 0xF) { // Writeback
4037 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4038 return MCDisassembler::Fail;
4040 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4041 return MCDisassembler::Fail;
4042 Inst.addOperand(MCOperand::CreateImm(align));
4045 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4046 return MCDisassembler::Fail;
4048 Inst.addOperand(MCOperand::CreateReg(0));
4051 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4052 return MCDisassembler::Fail;
4053 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4054 return MCDisassembler::Fail;
4055 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4056 return MCDisassembler::Fail;
4057 Inst.addOperand(MCOperand::CreateImm(index));
4063 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
4064 uint64_t Address, const void *Decoder) {
4065 DecodeStatus S = MCDisassembler::Success;
4067 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4068 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4069 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4070 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4071 unsigned size = fieldFromInstruction(Insn, 10, 2);
4078 return MCDisassembler::Fail;
4080 if (fieldFromInstruction(Insn, 4, 1))
4082 index = fieldFromInstruction(Insn, 5, 3);
4085 if (fieldFromInstruction(Insn, 4, 1))
4087 index = fieldFromInstruction(Insn, 6, 2);
4088 if (fieldFromInstruction(Insn, 5, 1))
4092 switch (fieldFromInstruction(Insn, 4, 2)) {
4096 return MCDisassembler::Fail;
4098 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4101 index = fieldFromInstruction(Insn, 7, 1);
4102 if (fieldFromInstruction(Insn, 6, 1))
4107 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4108 return MCDisassembler::Fail;
4109 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4110 return MCDisassembler::Fail;
4111 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4112 return MCDisassembler::Fail;
4113 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4114 return MCDisassembler::Fail;
4116 if (Rm != 0xF) { // Writeback
4117 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4118 return MCDisassembler::Fail;
4120 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4121 return MCDisassembler::Fail;
4122 Inst.addOperand(MCOperand::CreateImm(align));
4125 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4126 return MCDisassembler::Fail;
4128 Inst.addOperand(MCOperand::CreateReg(0));
4131 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4132 return MCDisassembler::Fail;
4133 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4134 return MCDisassembler::Fail;
4135 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4136 return MCDisassembler::Fail;
4137 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4138 return MCDisassembler::Fail;
4139 Inst.addOperand(MCOperand::CreateImm(index));
4144 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
4145 uint64_t Address, const void *Decoder) {
4146 DecodeStatus S = MCDisassembler::Success;
4148 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4149 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4150 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4151 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4152 unsigned size = fieldFromInstruction(Insn, 10, 2);
4159 return MCDisassembler::Fail;
4161 if (fieldFromInstruction(Insn, 4, 1))
4163 index = fieldFromInstruction(Insn, 5, 3);
4166 if (fieldFromInstruction(Insn, 4, 1))
4168 index = fieldFromInstruction(Insn, 6, 2);
4169 if (fieldFromInstruction(Insn, 5, 1))
4173 switch (fieldFromInstruction(Insn, 4, 2)) {
4177 return MCDisassembler::Fail;
4179 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4182 index = fieldFromInstruction(Insn, 7, 1);
4183 if (fieldFromInstruction(Insn, 6, 1))
4188 if (Rm != 0xF) { // Writeback
4189 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4190 return MCDisassembler::Fail;
4192 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4193 return MCDisassembler::Fail;
4194 Inst.addOperand(MCOperand::CreateImm(align));
4197 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4198 return MCDisassembler::Fail;
4200 Inst.addOperand(MCOperand::CreateReg(0));
4203 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4204 return MCDisassembler::Fail;
4205 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4206 return MCDisassembler::Fail;
4207 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4208 return MCDisassembler::Fail;
4209 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4210 return MCDisassembler::Fail;
4211 Inst.addOperand(MCOperand::CreateImm(index));
4216 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
4217 uint64_t Address, const void *Decoder) {
4218 DecodeStatus S = MCDisassembler::Success;
4219 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4220 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4221 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4222 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4223 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4225 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4226 S = MCDisassembler::SoftFail;
4228 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4229 return MCDisassembler::Fail;
4230 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4231 return MCDisassembler::Fail;
4232 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4233 return MCDisassembler::Fail;
4234 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4235 return MCDisassembler::Fail;
4236 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4237 return MCDisassembler::Fail;
4242 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
4243 uint64_t Address, const void *Decoder) {
4244 DecodeStatus S = MCDisassembler::Success;
4245 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4246 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4247 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4248 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4249 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4251 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4252 S = MCDisassembler::SoftFail;
4254 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4255 return MCDisassembler::Fail;
4256 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4257 return MCDisassembler::Fail;
4258 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4259 return MCDisassembler::Fail;
4260 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4261 return MCDisassembler::Fail;
4262 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4263 return MCDisassembler::Fail;
4268 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Insn,
4269 uint64_t Address, const void *Decoder) {
4270 DecodeStatus S = MCDisassembler::Success;
4271 unsigned pred = fieldFromInstruction(Insn, 4, 4);
4272 unsigned mask = fieldFromInstruction(Insn, 0, 4);
4276 S = MCDisassembler::SoftFail;
4281 S = MCDisassembler::SoftFail;
4284 Inst.addOperand(MCOperand::CreateImm(pred));
4285 Inst.addOperand(MCOperand::CreateImm(mask));
4290 DecodeT2LDRDPreInstruction(MCInst &Inst, unsigned Insn,
4291 uint64_t Address, const void *Decoder) {
4292 DecodeStatus S = MCDisassembler::Success;
4294 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4295 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
4296 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4297 unsigned addr = fieldFromInstruction(Insn, 0, 8);
4298 unsigned W = fieldFromInstruction(Insn, 21, 1);
4299 unsigned U = fieldFromInstruction(Insn, 23, 1);
4300 unsigned P = fieldFromInstruction(Insn, 24, 1);
4301 bool writeback = (W == 1) | (P == 0);
4303 addr |= (U << 8) | (Rn << 9);
4305 if (writeback && (Rn == Rt || Rn == Rt2))
4306 Check(S, MCDisassembler::SoftFail);
4308 Check(S, MCDisassembler::SoftFail);
4311 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4312 return MCDisassembler::Fail;
4314 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4315 return MCDisassembler::Fail;
4316 // Writeback operand
4317 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4318 return MCDisassembler::Fail;
4320 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4321 return MCDisassembler::Fail;
4327 DecodeT2STRDPreInstruction(MCInst &Inst, unsigned Insn,
4328 uint64_t Address, const void *Decoder) {
4329 DecodeStatus S = MCDisassembler::Success;
4331 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4332 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
4333 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4334 unsigned addr = fieldFromInstruction(Insn, 0, 8);
4335 unsigned W = fieldFromInstruction(Insn, 21, 1);
4336 unsigned U = fieldFromInstruction(Insn, 23, 1);
4337 unsigned P = fieldFromInstruction(Insn, 24, 1);
4338 bool writeback = (W == 1) | (P == 0);
4340 addr |= (U << 8) | (Rn << 9);
4342 if (writeback && (Rn == Rt || Rn == Rt2))
4343 Check(S, MCDisassembler::SoftFail);
4345 // Writeback operand
4346 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4347 return MCDisassembler::Fail;
4349 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4350 return MCDisassembler::Fail;
4352 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4353 return MCDisassembler::Fail;
4355 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4356 return MCDisassembler::Fail;
4361 static DecodeStatus DecodeT2Adr(MCInst &Inst, uint32_t Insn,
4362 uint64_t Address, const void *Decoder) {
4363 unsigned sign1 = fieldFromInstruction(Insn, 21, 1);
4364 unsigned sign2 = fieldFromInstruction(Insn, 23, 1);
4365 if (sign1 != sign2) return MCDisassembler::Fail;
4367 unsigned Val = fieldFromInstruction(Insn, 0, 8);
4368 Val |= fieldFromInstruction(Insn, 12, 3) << 8;
4369 Val |= fieldFromInstruction(Insn, 26, 1) << 11;
4371 Inst.addOperand(MCOperand::CreateImm(SignExtend32<13>(Val)));
4373 return MCDisassembler::Success;
4376 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, uint32_t Val,
4378 const void *Decoder) {
4379 DecodeStatus S = MCDisassembler::Success;
4381 // Shift of "asr #32" is not allowed in Thumb2 mode.
4382 if (Val == 0x20) S = MCDisassembler::SoftFail;
4383 Inst.addOperand(MCOperand::CreateImm(Val));
4387 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
4388 uint64_t Address, const void *Decoder) {
4389 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4390 unsigned Rt2 = fieldFromInstruction(Insn, 0, 4);
4391 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4392 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4395 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
4397 DecodeStatus S = MCDisassembler::Success;
4399 if (Rt == Rn || Rn == Rt2)
4400 S = MCDisassembler::SoftFail;
4402 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4403 return MCDisassembler::Fail;
4404 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
4405 return MCDisassembler::Fail;
4406 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4407 return MCDisassembler::Fail;
4408 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4409 return MCDisassembler::Fail;
4414 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
4415 uint64_t Address, const void *Decoder) {
4416 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
4417 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
4418 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
4419 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
4420 unsigned imm = fieldFromInstruction(Insn, 16, 6);
4421 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
4423 DecodeStatus S = MCDisassembler::Success;
4425 // VMOVv2f32 is ambiguous with these decodings.
4426 if (!(imm & 0x38) && cmode == 0xF) {
4427 Inst.setOpcode(ARM::VMOVv2f32);
4428 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4431 if (!(imm & 0x20)) Check(S, MCDisassembler::SoftFail);
4433 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
4434 return MCDisassembler::Fail;
4435 if (!Check(S, DecodeDPRRegisterClass(Inst, Vm, Address, Decoder)))
4436 return MCDisassembler::Fail;
4437 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4442 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
4443 uint64_t Address, const void *Decoder) {
4444 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
4445 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
4446 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
4447 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
4448 unsigned imm = fieldFromInstruction(Insn, 16, 6);
4449 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
4451 DecodeStatus S = MCDisassembler::Success;
4453 // VMOVv4f32 is ambiguous with these decodings.
4454 if (!(imm & 0x38) && cmode == 0xF) {
4455 Inst.setOpcode(ARM::VMOVv4f32);
4456 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4459 if (!(imm & 0x20)) Check(S, MCDisassembler::SoftFail);
4461 if (!Check(S, DecodeQPRRegisterClass(Inst, Vd, Address, Decoder)))
4462 return MCDisassembler::Fail;
4463 if (!Check(S, DecodeQPRRegisterClass(Inst, Vm, Address, Decoder)))
4464 return MCDisassembler::Fail;
4465 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4470 static DecodeStatus DecodeImm0_4(MCInst &Inst, unsigned Insn, uint64_t Address,
4471 const void *Decoder)
4473 unsigned Imm = fieldFromInstruction(Insn, 0, 3);
4474 if (Imm > 4) return MCDisassembler::Fail;
4475 Inst.addOperand(MCOperand::CreateImm(Imm));
4476 return MCDisassembler::Success;
4479 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
4480 uint64_t Address, const void *Decoder) {
4481 DecodeStatus S = MCDisassembler::Success;
4483 unsigned Rn = fieldFromInstruction(Val, 16, 4);
4484 unsigned Rt = fieldFromInstruction(Val, 12, 4);
4485 unsigned Rm = fieldFromInstruction(Val, 0, 4);
4486 Rm |= (fieldFromInstruction(Val, 23, 1) << 4);
4487 unsigned Cond = fieldFromInstruction(Val, 28, 4);
4489 if (fieldFromInstruction(Val, 8, 4) != 0 || Rn == Rt)
4490 S = MCDisassembler::SoftFail;
4492 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4493 return MCDisassembler::Fail;
4494 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4495 return MCDisassembler::Fail;
4496 if (!Check(S, DecodeAddrMode7Operand(Inst, Rn, Address, Decoder)))
4497 return MCDisassembler::Fail;
4498 if (!Check(S, DecodePostIdxReg(Inst, Rm, Address, Decoder)))
4499 return MCDisassembler::Fail;
4500 if (!Check(S, DecodePredicateOperand(Inst, Cond, Address, Decoder)))
4501 return MCDisassembler::Fail;
4506 static DecodeStatus DecodeMRRC2(llvm::MCInst &Inst, unsigned Val,
4507 uint64_t Address, const void *Decoder) {
4509 DecodeStatus S = MCDisassembler::Success;
4511 unsigned CRm = fieldFromInstruction(Val, 0, 4);
4512 unsigned opc1 = fieldFromInstruction(Val, 4, 4);
4513 unsigned cop = fieldFromInstruction(Val, 8, 4);
4514 unsigned Rt = fieldFromInstruction(Val, 12, 4);
4515 unsigned Rt2 = fieldFromInstruction(Val, 16, 4);
4517 if ((cop & ~0x1) == 0xa)
4518 return MCDisassembler::Fail;
4521 S = MCDisassembler::SoftFail;
4523 Inst.addOperand(MCOperand::CreateImm(cop));
4524 Inst.addOperand(MCOperand::CreateImm(opc1));
4525 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4526 return MCDisassembler::Fail;
4527 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
4528 return MCDisassembler::Fail;
4529 Inst.addOperand(MCOperand::CreateImm(CRm));