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 DecodeQADDInstruction(MCInst &Inst, unsigned Insn,
363 uint64_t Address, const void *Decoder);
364 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Insn,
365 uint64_t Address, const void *Decoder);
366 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
367 uint64_t Address, const void *Decoder);
368 static DecodeStatus DecodeThumbTableBranch(MCInst &Inst, unsigned Val,
369 uint64_t Address, const void *Decoder);
370 static DecodeStatus DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Val,
371 uint64_t Address, const void *Decoder);
372 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
373 uint64_t Address, const void *Decoder);
374 static DecodeStatus DecodeThumbBCCTargetOperand(MCInst &Inst,unsigned Val,
375 uint64_t Address, const void *Decoder);
376 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
377 uint64_t Address, const void *Decoder);
378 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Val,
379 uint64_t Address, const void *Decoder);
380 static DecodeStatus DecodeT2LDRDPreInstruction(MCInst &Inst,unsigned Insn,
381 uint64_t Address, const void *Decoder);
382 static DecodeStatus DecodeT2STRDPreInstruction(MCInst &Inst,unsigned Insn,
383 uint64_t Address, const void *Decoder);
384 static DecodeStatus DecodeT2Adr(MCInst &Inst, unsigned Val,
385 uint64_t Address, const void *Decoder);
386 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Val,
387 uint64_t Address, const void *Decoder);
388 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, unsigned Val,
389 uint64_t Address, const void *Decoder);
391 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
392 uint64_t Address, const void *Decoder);
393 static DecodeStatus DecodeMRRC2(llvm::MCInst &Inst, unsigned Val,
394 uint64_t Address, const void *Decoder);
395 #include "ARMGenDisassemblerTables.inc"
397 static MCDisassembler *createARMDisassembler(const Target &T, const MCSubtargetInfo &STI) {
398 return new ARMDisassembler(STI);
401 static MCDisassembler *createThumbDisassembler(const Target &T, const MCSubtargetInfo &STI) {
402 return new ThumbDisassembler(STI);
405 DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
406 const MemoryObject &Region,
409 raw_ostream &cs) const {
414 assert(!(STI.getFeatureBits() & ARM::ModeThumb) &&
415 "Asked to disassemble an ARM instruction but Subtarget is in Thumb mode!");
417 // We want to read exactly 4 bytes of data.
418 if (Region.readBytes(Address, 4, bytes) == -1) {
420 return MCDisassembler::Fail;
423 // Encoded as a small-endian 32-bit word in the stream.
424 uint32_t insn = (bytes[3] << 24) |
429 // Calling the auto-generated decoder function.
430 DecodeStatus result = decodeInstruction(DecoderTableARM32, MI, insn,
432 if (result != MCDisassembler::Fail) {
437 // VFP and NEON instructions, similarly, are shared between ARM
440 result = decodeInstruction(DecoderTableVFP32, MI, insn, Address, this, STI);
441 if (result != MCDisassembler::Fail) {
447 result = decodeInstruction(DecoderTableNEONData32, MI, insn, Address,
449 if (result != MCDisassembler::Fail) {
451 // Add a fake predicate operand, because we share these instruction
452 // definitions with Thumb2 where these instructions are predicable.
453 if (!DecodePredicateOperand(MI, 0xE, Address, this))
454 return MCDisassembler::Fail;
459 result = decodeInstruction(DecoderTableNEONLoadStore32, MI, insn, Address,
461 if (result != MCDisassembler::Fail) {
463 // Add a fake predicate operand, because we share these instruction
464 // definitions with Thumb2 where these instructions are predicable.
465 if (!DecodePredicateOperand(MI, 0xE, Address, this))
466 return MCDisassembler::Fail;
471 result = decodeInstruction(DecoderTableNEONDup32, MI, insn, Address,
473 if (result != MCDisassembler::Fail) {
475 // Add a fake predicate operand, because we share these instruction
476 // definitions with Thumb2 where these instructions are predicable.
477 if (!DecodePredicateOperand(MI, 0xE, Address, this))
478 return MCDisassembler::Fail;
485 return MCDisassembler::Fail;
489 extern const MCInstrDesc ARMInsts[];
492 /// tryAddingSymbolicOperand - trys to add a symbolic operand in place of the
493 /// immediate Value in the MCInst. The immediate Value has had any PC
494 /// adjustment made by the caller. If the instruction is a branch instruction
495 /// then isBranch is true, else false. If the getOpInfo() function was set as
496 /// part of the setupForSymbolicDisassembly() call then that function is called
497 /// to get any symbolic information at the Address for this instruction. If
498 /// that returns non-zero then the symbolic information it returns is used to
499 /// create an MCExpr and that is added as an operand to the MCInst. If
500 /// getOpInfo() returns zero and isBranch is true then a symbol look up for
501 /// Value is done and if a symbol is found an MCExpr is created with that, else
502 /// an MCExpr with Value is created. This function returns true if it adds an
503 /// operand to the MCInst and false otherwise.
504 static bool tryAddingSymbolicOperand(uint64_t Address, int32_t Value,
505 bool isBranch, uint64_t InstSize,
506 MCInst &MI, const void *Decoder) {
507 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
508 // FIXME: Does it make sense for value to be negative?
509 return Dis->tryAddingSymbolicOperand(MI, (uint32_t)Value, Address, isBranch,
510 /* Offset */ 0, InstSize);
513 /// tryAddingPcLoadReferenceComment - trys to add a comment as to what is being
514 /// referenced by a load instruction with the base register that is the Pc.
515 /// These can often be values in a literal pool near the Address of the
516 /// instruction. The Address of the instruction and its immediate Value are
517 /// used as a possible literal pool entry. The SymbolLookUp call back will
518 /// return the name of a symbol referenced by the literal pool's entry if
519 /// the referenced address is that of a symbol. Or it will return a pointer to
520 /// a literal 'C' string if the referenced address of the literal pool's entry
521 /// is an address into a section with 'C' string literals.
522 static void tryAddingPcLoadReferenceComment(uint64_t Address, int Value,
523 const void *Decoder) {
524 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
525 Dis->tryAddingPcLoadReferenceComment(Value, Address);
528 // Thumb1 instructions don't have explicit S bits. Rather, they
529 // implicitly set CPSR. Since it's not represented in the encoding, the
530 // auto-generated decoder won't inject the CPSR operand. We need to fix
531 // that as a post-pass.
532 static void AddThumb1SBit(MCInst &MI, bool InITBlock) {
533 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
534 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
535 MCInst::iterator I = MI.begin();
536 for (unsigned i = 0; i < NumOps; ++i, ++I) {
537 if (I == MI.end()) break;
538 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) {
539 if (i > 0 && OpInfo[i-1].isPredicate()) continue;
540 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
545 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
548 // Most Thumb instructions don't have explicit predicates in the
549 // encoding, but rather get their predicates from IT context. We need
550 // to fix up the predicate operands using this context information as a
552 MCDisassembler::DecodeStatus
553 ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
554 MCDisassembler::DecodeStatus S = Success;
556 // A few instructions actually have predicates encoded in them. Don't
557 // try to overwrite it if we're seeing one of those.
558 switch (MI.getOpcode()) {
569 // Some instructions (mostly conditional branches) are not
570 // allowed in IT blocks.
571 if (ITBlock.instrInITBlock())
580 // Some instructions (mostly unconditional branches) can
581 // only appears at the end of, or outside of, an IT.
582 if (ITBlock.instrInITBlock() && !ITBlock.instrLastInITBlock())
589 // If we're in an IT block, base the predicate on that. Otherwise,
590 // assume a predicate of AL.
592 CC = ITBlock.getITCC();
595 if (ITBlock.instrInITBlock())
596 ITBlock.advanceITState();
598 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
599 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
600 MCInst::iterator I = MI.begin();
601 for (unsigned i = 0; i < NumOps; ++i, ++I) {
602 if (I == MI.end()) break;
603 if (OpInfo[i].isPredicate()) {
604 I = MI.insert(I, MCOperand::CreateImm(CC));
607 MI.insert(I, MCOperand::CreateReg(0));
609 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
614 I = MI.insert(I, MCOperand::CreateImm(CC));
617 MI.insert(I, MCOperand::CreateReg(0));
619 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
624 // Thumb VFP instructions are a special case. Because we share their
625 // encodings between ARM and Thumb modes, and they are predicable in ARM
626 // mode, the auto-generated decoder will give them an (incorrect)
627 // predicate operand. We need to rewrite these operands based on the IT
628 // context as a post-pass.
629 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
631 CC = ITBlock.getITCC();
632 if (ITBlock.instrInITBlock())
633 ITBlock.advanceITState();
635 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
636 MCInst::iterator I = MI.begin();
637 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
638 for (unsigned i = 0; i < NumOps; ++i, ++I) {
639 if (OpInfo[i].isPredicate() ) {
645 I->setReg(ARM::CPSR);
651 DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
652 const MemoryObject &Region,
655 raw_ostream &cs) const {
660 assert((STI.getFeatureBits() & ARM::ModeThumb) &&
661 "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!");
663 // We want to read exactly 2 bytes of data.
664 if (Region.readBytes(Address, 2, bytes) == -1) {
666 return MCDisassembler::Fail;
669 uint16_t insn16 = (bytes[1] << 8) | bytes[0];
670 DecodeStatus result = decodeInstruction(DecoderTableThumb16, MI, insn16,
672 if (result != MCDisassembler::Fail) {
674 Check(result, AddThumbPredicate(MI));
679 result = decodeInstruction(DecoderTableThumbSBit16, MI, insn16,
683 bool InITBlock = ITBlock.instrInITBlock();
684 Check(result, AddThumbPredicate(MI));
685 AddThumb1SBit(MI, InITBlock);
690 result = decodeInstruction(DecoderTableThumb216, MI, insn16,
692 if (result != MCDisassembler::Fail) {
695 // Nested IT blocks are UNPREDICTABLE. Must be checked before we add
696 // the Thumb predicate.
697 if (MI.getOpcode() == ARM::t2IT && ITBlock.instrInITBlock())
698 result = MCDisassembler::SoftFail;
700 Check(result, AddThumbPredicate(MI));
702 // If we find an IT instruction, we need to parse its condition
703 // code and mask operands so that we can apply them correctly
704 // to the subsequent instructions.
705 if (MI.getOpcode() == ARM::t2IT) {
707 unsigned Firstcond = MI.getOperand(0).getImm();
708 unsigned Mask = MI.getOperand(1).getImm();
709 ITBlock.setITState(Firstcond, Mask);
715 // We want to read exactly 4 bytes of data.
716 if (Region.readBytes(Address, 4, bytes) == -1) {
718 return MCDisassembler::Fail;
721 uint32_t insn32 = (bytes[3] << 8) |
726 result = decodeInstruction(DecoderTableThumb32, MI, insn32, Address,
728 if (result != MCDisassembler::Fail) {
730 bool InITBlock = ITBlock.instrInITBlock();
731 Check(result, AddThumbPredicate(MI));
732 AddThumb1SBit(MI, InITBlock);
737 result = decodeInstruction(DecoderTableThumb232, MI, insn32, Address,
739 if (result != MCDisassembler::Fail) {
741 Check(result, AddThumbPredicate(MI));
746 result = decodeInstruction(DecoderTableVFP32, MI, insn32, Address, this, STI);
747 if (result != MCDisassembler::Fail) {
749 UpdateThumbVFPPredicate(MI);
754 result = decodeInstruction(DecoderTableNEONDup32, MI, insn32, Address,
756 if (result != MCDisassembler::Fail) {
758 Check(result, AddThumbPredicate(MI));
762 if (fieldFromInstruction(insn32, 24, 8) == 0xF9) {
764 uint32_t NEONLdStInsn = insn32;
765 NEONLdStInsn &= 0xF0FFFFFF;
766 NEONLdStInsn |= 0x04000000;
767 result = decodeInstruction(DecoderTableNEONLoadStore32, MI, NEONLdStInsn,
769 if (result != MCDisassembler::Fail) {
771 Check(result, AddThumbPredicate(MI));
776 if (fieldFromInstruction(insn32, 24, 4) == 0xF) {
778 uint32_t NEONDataInsn = insn32;
779 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
780 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
781 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
782 result = decodeInstruction(DecoderTableNEONData32, MI, NEONDataInsn,
784 if (result != MCDisassembler::Fail) {
786 Check(result, AddThumbPredicate(MI));
792 return MCDisassembler::Fail;
796 extern "C" void LLVMInitializeARMDisassembler() {
797 TargetRegistry::RegisterMCDisassembler(TheARMTarget,
798 createARMDisassembler);
799 TargetRegistry::RegisterMCDisassembler(TheThumbTarget,
800 createThumbDisassembler);
803 static const uint16_t GPRDecoderTable[] = {
804 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
805 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
806 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
807 ARM::R12, ARM::SP, ARM::LR, ARM::PC
810 static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
811 uint64_t Address, const void *Decoder) {
813 return MCDisassembler::Fail;
815 unsigned Register = GPRDecoderTable[RegNo];
816 Inst.addOperand(MCOperand::CreateReg(Register));
817 return MCDisassembler::Success;
821 DecodeGPRnopcRegisterClass(MCInst &Inst, unsigned RegNo,
822 uint64_t Address, const void *Decoder) {
823 DecodeStatus S = MCDisassembler::Success;
826 S = MCDisassembler::SoftFail;
828 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
834 DecodeGPRwithAPSRRegisterClass(MCInst &Inst, unsigned RegNo,
835 uint64_t Address, const void *Decoder) {
836 DecodeStatus S = MCDisassembler::Success;
840 Inst.addOperand(MCOperand::CreateReg(ARM::APSR_NZCV));
841 return MCDisassembler::Success;
844 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
848 static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
849 uint64_t Address, const void *Decoder) {
851 return MCDisassembler::Fail;
852 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
855 static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
856 uint64_t Address, const void *Decoder) {
857 unsigned Register = 0;
878 return MCDisassembler::Fail;
881 Inst.addOperand(MCOperand::CreateReg(Register));
882 return MCDisassembler::Success;
885 static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
886 uint64_t Address, const void *Decoder) {
887 if (RegNo == 13 || RegNo == 15) return MCDisassembler::Fail;
888 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
891 static const uint16_t SPRDecoderTable[] = {
892 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
893 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
894 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
895 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
896 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
897 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
898 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
899 ARM::S28, ARM::S29, ARM::S30, ARM::S31
902 static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
903 uint64_t Address, const void *Decoder) {
905 return MCDisassembler::Fail;
907 unsigned Register = SPRDecoderTable[RegNo];
908 Inst.addOperand(MCOperand::CreateReg(Register));
909 return MCDisassembler::Success;
912 static const uint16_t DPRDecoderTable[] = {
913 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
914 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
915 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
916 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
917 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
918 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
919 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
920 ARM::D28, ARM::D29, ARM::D30, ARM::D31
923 static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
924 uint64_t Address, const void *Decoder) {
926 return MCDisassembler::Fail;
928 unsigned Register = DPRDecoderTable[RegNo];
929 Inst.addOperand(MCOperand::CreateReg(Register));
930 return MCDisassembler::Success;
933 static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
934 uint64_t Address, const void *Decoder) {
936 return MCDisassembler::Fail;
937 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
941 DecodeDPR_VFP2RegisterClass(MCInst &Inst, unsigned RegNo,
942 uint64_t Address, const void *Decoder) {
944 return MCDisassembler::Fail;
945 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
948 static const uint16_t QPRDecoderTable[] = {
949 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
950 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
951 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
952 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
956 static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
957 uint64_t Address, const void *Decoder) {
958 if (RegNo > 31 || (RegNo & 1) != 0)
959 return MCDisassembler::Fail;
962 unsigned Register = QPRDecoderTable[RegNo];
963 Inst.addOperand(MCOperand::CreateReg(Register));
964 return MCDisassembler::Success;
967 static const uint16_t DPairDecoderTable[] = {
968 ARM::Q0, ARM::D1_D2, ARM::Q1, ARM::D3_D4, ARM::Q2, ARM::D5_D6,
969 ARM::Q3, ARM::D7_D8, ARM::Q4, ARM::D9_D10, ARM::Q5, ARM::D11_D12,
970 ARM::Q6, ARM::D13_D14, ARM::Q7, ARM::D15_D16, ARM::Q8, ARM::D17_D18,
971 ARM::Q9, ARM::D19_D20, ARM::Q10, ARM::D21_D22, ARM::Q11, ARM::D23_D24,
972 ARM::Q12, ARM::D25_D26, ARM::Q13, ARM::D27_D28, ARM::Q14, ARM::D29_D30,
976 static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
977 uint64_t Address, const void *Decoder) {
979 return MCDisassembler::Fail;
981 unsigned Register = DPairDecoderTable[RegNo];
982 Inst.addOperand(MCOperand::CreateReg(Register));
983 return MCDisassembler::Success;
986 static const uint16_t DPairSpacedDecoderTable[] = {
987 ARM::D0_D2, ARM::D1_D3, ARM::D2_D4, ARM::D3_D5,
988 ARM::D4_D6, ARM::D5_D7, ARM::D6_D8, ARM::D7_D9,
989 ARM::D8_D10, ARM::D9_D11, ARM::D10_D12, ARM::D11_D13,
990 ARM::D12_D14, ARM::D13_D15, ARM::D14_D16, ARM::D15_D17,
991 ARM::D16_D18, ARM::D17_D19, ARM::D18_D20, ARM::D19_D21,
992 ARM::D20_D22, ARM::D21_D23, ARM::D22_D24, ARM::D23_D25,
993 ARM::D24_D26, ARM::D25_D27, ARM::D26_D28, ARM::D27_D29,
994 ARM::D28_D30, ARM::D29_D31
997 static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
1000 const void *Decoder) {
1002 return MCDisassembler::Fail;
1004 unsigned Register = DPairSpacedDecoderTable[RegNo];
1005 Inst.addOperand(MCOperand::CreateReg(Register));
1006 return MCDisassembler::Success;
1009 static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
1010 uint64_t Address, const void *Decoder) {
1011 if (Val == 0xF) return MCDisassembler::Fail;
1012 // AL predicate is not allowed on Thumb1 branches.
1013 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
1014 return MCDisassembler::Fail;
1015 Inst.addOperand(MCOperand::CreateImm(Val));
1016 if (Val == ARMCC::AL) {
1017 Inst.addOperand(MCOperand::CreateReg(0));
1019 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1020 return MCDisassembler::Success;
1023 static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
1024 uint64_t Address, const void *Decoder) {
1026 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1028 Inst.addOperand(MCOperand::CreateReg(0));
1029 return MCDisassembler::Success;
1032 static DecodeStatus DecodeSOImmOperand(MCInst &Inst, unsigned Val,
1033 uint64_t Address, const void *Decoder) {
1034 uint32_t imm = Val & 0xFF;
1035 uint32_t rot = (Val & 0xF00) >> 7;
1036 uint32_t rot_imm = (imm >> rot) | (imm << ((32-rot) & 0x1F));
1037 Inst.addOperand(MCOperand::CreateImm(rot_imm));
1038 return MCDisassembler::Success;
1041 static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Val,
1042 uint64_t Address, const void *Decoder) {
1043 DecodeStatus S = MCDisassembler::Success;
1045 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1046 unsigned type = fieldFromInstruction(Val, 5, 2);
1047 unsigned imm = fieldFromInstruction(Val, 7, 5);
1049 // Register-immediate
1050 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1051 return MCDisassembler::Fail;
1053 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1056 Shift = ARM_AM::lsl;
1059 Shift = ARM_AM::lsr;
1062 Shift = ARM_AM::asr;
1065 Shift = ARM_AM::ror;
1069 if (Shift == ARM_AM::ror && imm == 0)
1070 Shift = ARM_AM::rrx;
1072 unsigned Op = Shift | (imm << 3);
1073 Inst.addOperand(MCOperand::CreateImm(Op));
1078 static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Val,
1079 uint64_t Address, const void *Decoder) {
1080 DecodeStatus S = MCDisassembler::Success;
1082 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1083 unsigned type = fieldFromInstruction(Val, 5, 2);
1084 unsigned Rs = fieldFromInstruction(Val, 8, 4);
1086 // Register-register
1087 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1088 return MCDisassembler::Fail;
1089 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)))
1090 return MCDisassembler::Fail;
1092 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1095 Shift = ARM_AM::lsl;
1098 Shift = ARM_AM::lsr;
1101 Shift = ARM_AM::asr;
1104 Shift = ARM_AM::ror;
1108 Inst.addOperand(MCOperand::CreateImm(Shift));
1113 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
1114 uint64_t Address, const void *Decoder) {
1115 DecodeStatus S = MCDisassembler::Success;
1117 bool writebackLoad = false;
1118 unsigned writebackReg = 0;
1119 switch (Inst.getOpcode()) {
1122 case ARM::LDMIA_UPD:
1123 case ARM::LDMDB_UPD:
1124 case ARM::LDMIB_UPD:
1125 case ARM::LDMDA_UPD:
1126 case ARM::t2LDMIA_UPD:
1127 case ARM::t2LDMDB_UPD:
1128 writebackLoad = true;
1129 writebackReg = Inst.getOperand(0).getReg();
1133 // Empty register lists are not allowed.
1134 if (Val == 0) return MCDisassembler::Fail;
1135 for (unsigned i = 0; i < 16; ++i) {
1136 if (Val & (1 << i)) {
1137 if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder)))
1138 return MCDisassembler::Fail;
1139 // Writeback not allowed if Rn is in the target list.
1140 if (writebackLoad && writebackReg == Inst.end()[-1].getReg())
1141 Check(S, MCDisassembler::SoftFail);
1148 static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
1149 uint64_t Address, const void *Decoder) {
1150 DecodeStatus S = MCDisassembler::Success;
1152 unsigned Vd = fieldFromInstruction(Val, 8, 5);
1153 unsigned regs = fieldFromInstruction(Val, 0, 8);
1155 // In case of unpredictable encoding, tweak the operands.
1156 if (regs == 0 || (Vd + regs) > 32) {
1157 regs = Vd + regs > 32 ? 32 - Vd : regs;
1158 regs = std::max( 1u, regs);
1159 S = MCDisassembler::SoftFail;
1162 if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
1163 return MCDisassembler::Fail;
1164 for (unsigned i = 0; i < (regs - 1); ++i) {
1165 if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1166 return MCDisassembler::Fail;
1172 static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
1173 uint64_t Address, const void *Decoder) {
1174 DecodeStatus S = MCDisassembler::Success;
1176 unsigned Vd = fieldFromInstruction(Val, 8, 5);
1177 unsigned regs = fieldFromInstruction(Val, 1, 7);
1179 // In case of unpredictable encoding, tweak the operands.
1180 if (regs == 0 || regs > 16 || (Vd + regs) > 32) {
1181 regs = Vd + regs > 32 ? 32 - Vd : regs;
1182 regs = std::max( 1u, regs);
1183 regs = std::min(16u, regs);
1184 S = MCDisassembler::SoftFail;
1187 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
1188 return MCDisassembler::Fail;
1189 for (unsigned i = 0; i < (regs - 1); ++i) {
1190 if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1191 return MCDisassembler::Fail;
1197 static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Val,
1198 uint64_t Address, const void *Decoder) {
1199 // This operand encodes a mask of contiguous zeros between a specified MSB
1200 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
1201 // the mask of all bits LSB-and-lower, and then xor them to create
1202 // the mask of that's all ones on [msb, lsb]. Finally we not it to
1203 // create the final mask.
1204 unsigned msb = fieldFromInstruction(Val, 5, 5);
1205 unsigned lsb = fieldFromInstruction(Val, 0, 5);
1207 DecodeStatus S = MCDisassembler::Success;
1209 Check(S, MCDisassembler::SoftFail);
1210 // The check above will cause the warning for the "potentially undefined
1211 // instruction encoding" but we can't build a bad MCOperand value here
1212 // with a lsb > msb or else printing the MCInst will cause a crash.
1216 uint32_t msb_mask = 0xFFFFFFFF;
1217 if (msb != 31) msb_mask = (1U << (msb+1)) - 1;
1218 uint32_t lsb_mask = (1U << lsb) - 1;
1220 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
1224 static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
1225 uint64_t Address, const void *Decoder) {
1226 DecodeStatus S = MCDisassembler::Success;
1228 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1229 unsigned CRd = fieldFromInstruction(Insn, 12, 4);
1230 unsigned coproc = fieldFromInstruction(Insn, 8, 4);
1231 unsigned imm = fieldFromInstruction(Insn, 0, 8);
1232 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1233 unsigned U = fieldFromInstruction(Insn, 23, 1);
1235 switch (Inst.getOpcode()) {
1236 case ARM::LDC_OFFSET:
1239 case ARM::LDC_OPTION:
1240 case ARM::LDCL_OFFSET:
1242 case ARM::LDCL_POST:
1243 case ARM::LDCL_OPTION:
1244 case ARM::STC_OFFSET:
1247 case ARM::STC_OPTION:
1248 case ARM::STCL_OFFSET:
1250 case ARM::STCL_POST:
1251 case ARM::STCL_OPTION:
1252 case ARM::t2LDC_OFFSET:
1253 case ARM::t2LDC_PRE:
1254 case ARM::t2LDC_POST:
1255 case ARM::t2LDC_OPTION:
1256 case ARM::t2LDCL_OFFSET:
1257 case ARM::t2LDCL_PRE:
1258 case ARM::t2LDCL_POST:
1259 case ARM::t2LDCL_OPTION:
1260 case ARM::t2STC_OFFSET:
1261 case ARM::t2STC_PRE:
1262 case ARM::t2STC_POST:
1263 case ARM::t2STC_OPTION:
1264 case ARM::t2STCL_OFFSET:
1265 case ARM::t2STCL_PRE:
1266 case ARM::t2STCL_POST:
1267 case ARM::t2STCL_OPTION:
1268 if (coproc == 0xA || coproc == 0xB)
1269 return MCDisassembler::Fail;
1275 Inst.addOperand(MCOperand::CreateImm(coproc));
1276 Inst.addOperand(MCOperand::CreateImm(CRd));
1277 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1278 return MCDisassembler::Fail;
1280 switch (Inst.getOpcode()) {
1281 case ARM::t2LDC2_OFFSET:
1282 case ARM::t2LDC2L_OFFSET:
1283 case ARM::t2LDC2_PRE:
1284 case ARM::t2LDC2L_PRE:
1285 case ARM::t2STC2_OFFSET:
1286 case ARM::t2STC2L_OFFSET:
1287 case ARM::t2STC2_PRE:
1288 case ARM::t2STC2L_PRE:
1289 case ARM::LDC2_OFFSET:
1290 case ARM::LDC2L_OFFSET:
1292 case ARM::LDC2L_PRE:
1293 case ARM::STC2_OFFSET:
1294 case ARM::STC2L_OFFSET:
1296 case ARM::STC2L_PRE:
1297 case ARM::t2LDC_OFFSET:
1298 case ARM::t2LDCL_OFFSET:
1299 case ARM::t2LDC_PRE:
1300 case ARM::t2LDCL_PRE:
1301 case ARM::t2STC_OFFSET:
1302 case ARM::t2STCL_OFFSET:
1303 case ARM::t2STC_PRE:
1304 case ARM::t2STCL_PRE:
1305 case ARM::LDC_OFFSET:
1306 case ARM::LDCL_OFFSET:
1309 case ARM::STC_OFFSET:
1310 case ARM::STCL_OFFSET:
1313 imm = ARM_AM::getAM5Opc(U ? ARM_AM::add : ARM_AM::sub, imm);
1314 Inst.addOperand(MCOperand::CreateImm(imm));
1316 case ARM::t2LDC2_POST:
1317 case ARM::t2LDC2L_POST:
1318 case ARM::t2STC2_POST:
1319 case ARM::t2STC2L_POST:
1320 case ARM::LDC2_POST:
1321 case ARM::LDC2L_POST:
1322 case ARM::STC2_POST:
1323 case ARM::STC2L_POST:
1324 case ARM::t2LDC_POST:
1325 case ARM::t2LDCL_POST:
1326 case ARM::t2STC_POST:
1327 case ARM::t2STCL_POST:
1329 case ARM::LDCL_POST:
1331 case ARM::STCL_POST:
1335 // The 'option' variant doesn't encode 'U' in the immediate since
1336 // the immediate is unsigned [0,255].
1337 Inst.addOperand(MCOperand::CreateImm(imm));
1341 switch (Inst.getOpcode()) {
1342 case ARM::LDC_OFFSET:
1345 case ARM::LDC_OPTION:
1346 case ARM::LDCL_OFFSET:
1348 case ARM::LDCL_POST:
1349 case ARM::LDCL_OPTION:
1350 case ARM::STC_OFFSET:
1353 case ARM::STC_OPTION:
1354 case ARM::STCL_OFFSET:
1356 case ARM::STCL_POST:
1357 case ARM::STCL_OPTION:
1358 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1359 return MCDisassembler::Fail;
1369 DecodeAddrMode2IdxInstruction(MCInst &Inst, unsigned Insn,
1370 uint64_t Address, const void *Decoder) {
1371 DecodeStatus S = MCDisassembler::Success;
1373 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1374 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1375 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1376 unsigned imm = fieldFromInstruction(Insn, 0, 12);
1377 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1378 unsigned reg = fieldFromInstruction(Insn, 25, 1);
1379 unsigned P = fieldFromInstruction(Insn, 24, 1);
1380 unsigned W = fieldFromInstruction(Insn, 21, 1);
1382 // On stores, the writeback operand precedes Rt.
1383 switch (Inst.getOpcode()) {
1384 case ARM::STR_POST_IMM:
1385 case ARM::STR_POST_REG:
1386 case ARM::STRB_POST_IMM:
1387 case ARM::STRB_POST_REG:
1388 case ARM::STRT_POST_REG:
1389 case ARM::STRT_POST_IMM:
1390 case ARM::STRBT_POST_REG:
1391 case ARM::STRBT_POST_IMM:
1392 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1393 return MCDisassembler::Fail;
1399 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1400 return MCDisassembler::Fail;
1402 // On loads, the writeback operand comes after Rt.
1403 switch (Inst.getOpcode()) {
1404 case ARM::LDR_POST_IMM:
1405 case ARM::LDR_POST_REG:
1406 case ARM::LDRB_POST_IMM:
1407 case ARM::LDRB_POST_REG:
1408 case ARM::LDRBT_POST_REG:
1409 case ARM::LDRBT_POST_IMM:
1410 case ARM::LDRT_POST_REG:
1411 case ARM::LDRT_POST_IMM:
1412 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1413 return MCDisassembler::Fail;
1419 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1420 return MCDisassembler::Fail;
1422 ARM_AM::AddrOpc Op = ARM_AM::add;
1423 if (!fieldFromInstruction(Insn, 23, 1))
1426 bool writeback = (P == 0) || (W == 1);
1427 unsigned idx_mode = 0;
1429 idx_mode = ARMII::IndexModePre;
1430 else if (!P && writeback)
1431 idx_mode = ARMII::IndexModePost;
1433 if (writeback && (Rn == 15 || Rn == Rt))
1434 S = MCDisassembler::SoftFail; // UNPREDICTABLE
1437 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1438 return MCDisassembler::Fail;
1439 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1440 switch( fieldFromInstruction(Insn, 5, 2)) {
1454 return MCDisassembler::Fail;
1456 unsigned amt = fieldFromInstruction(Insn, 7, 5);
1457 if (Opc == ARM_AM::ror && amt == 0)
1459 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1461 Inst.addOperand(MCOperand::CreateImm(imm));
1463 Inst.addOperand(MCOperand::CreateReg(0));
1464 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1465 Inst.addOperand(MCOperand::CreateImm(tmp));
1468 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1469 return MCDisassembler::Fail;
1474 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Val,
1475 uint64_t Address, const void *Decoder) {
1476 DecodeStatus S = MCDisassembler::Success;
1478 unsigned Rn = fieldFromInstruction(Val, 13, 4);
1479 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1480 unsigned type = fieldFromInstruction(Val, 5, 2);
1481 unsigned imm = fieldFromInstruction(Val, 7, 5);
1482 unsigned U = fieldFromInstruction(Val, 12, 1);
1484 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1500 if (ShOp == ARM_AM::ror && imm == 0)
1503 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1504 return MCDisassembler::Fail;
1505 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1506 return MCDisassembler::Fail;
1509 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1511 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1512 Inst.addOperand(MCOperand::CreateImm(shift));
1518 DecodeAddrMode3Instruction(MCInst &Inst, unsigned Insn,
1519 uint64_t Address, const void *Decoder) {
1520 DecodeStatus S = MCDisassembler::Success;
1522 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1523 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1524 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1525 unsigned type = fieldFromInstruction(Insn, 22, 1);
1526 unsigned imm = fieldFromInstruction(Insn, 8, 4);
1527 unsigned U = ((~fieldFromInstruction(Insn, 23, 1)) & 1) << 8;
1528 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1529 unsigned W = fieldFromInstruction(Insn, 21, 1);
1530 unsigned P = fieldFromInstruction(Insn, 24, 1);
1531 unsigned Rt2 = Rt + 1;
1533 bool writeback = (W == 1) | (P == 0);
1535 // For {LD,ST}RD, Rt must be even, else undefined.
1536 switch (Inst.getOpcode()) {
1539 case ARM::STRD_POST:
1542 case ARM::LDRD_POST:
1543 if (Rt & 0x1) S = MCDisassembler::SoftFail;
1548 switch (Inst.getOpcode()) {
1551 case ARM::STRD_POST:
1552 if (P == 0 && W == 1)
1553 S = MCDisassembler::SoftFail;
1555 if (writeback && (Rn == 15 || Rn == Rt || Rn == Rt2))
1556 S = MCDisassembler::SoftFail;
1557 if (type && Rm == 15)
1558 S = MCDisassembler::SoftFail;
1560 S = MCDisassembler::SoftFail;
1561 if (!type && fieldFromInstruction(Insn, 8, 4))
1562 S = MCDisassembler::SoftFail;
1566 case ARM::STRH_POST:
1568 S = MCDisassembler::SoftFail;
1569 if (writeback && (Rn == 15 || Rn == Rt))
1570 S = MCDisassembler::SoftFail;
1571 if (!type && Rm == 15)
1572 S = MCDisassembler::SoftFail;
1576 case ARM::LDRD_POST:
1577 if (type && Rn == 15){
1579 S = MCDisassembler::SoftFail;
1582 if (P == 0 && W == 1)
1583 S = MCDisassembler::SoftFail;
1584 if (!type && (Rt2 == 15 || Rm == 15 || Rm == Rt || Rm == Rt2))
1585 S = MCDisassembler::SoftFail;
1586 if (!type && writeback && Rn == 15)
1587 S = MCDisassembler::SoftFail;
1588 if (writeback && (Rn == Rt || Rn == Rt2))
1589 S = MCDisassembler::SoftFail;
1593 case ARM::LDRH_POST:
1594 if (type && Rn == 15){
1596 S = MCDisassembler::SoftFail;
1600 S = MCDisassembler::SoftFail;
1601 if (!type && Rm == 15)
1602 S = MCDisassembler::SoftFail;
1603 if (!type && writeback && (Rn == 15 || Rn == Rt))
1604 S = MCDisassembler::SoftFail;
1607 case ARM::LDRSH_PRE:
1608 case ARM::LDRSH_POST:
1610 case ARM::LDRSB_PRE:
1611 case ARM::LDRSB_POST:
1612 if (type && Rn == 15){
1614 S = MCDisassembler::SoftFail;
1617 if (type && (Rt == 15 || (writeback && Rn == Rt)))
1618 S = MCDisassembler::SoftFail;
1619 if (!type && (Rt == 15 || Rm == 15))
1620 S = MCDisassembler::SoftFail;
1621 if (!type && writeback && (Rn == 15 || Rn == Rt))
1622 S = MCDisassembler::SoftFail;
1628 if (writeback) { // Writeback
1630 U |= ARMII::IndexModePre << 9;
1632 U |= ARMII::IndexModePost << 9;
1634 // On stores, the writeback operand precedes Rt.
1635 switch (Inst.getOpcode()) {
1638 case ARM::STRD_POST:
1641 case ARM::STRH_POST:
1642 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1643 return MCDisassembler::Fail;
1650 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1651 return MCDisassembler::Fail;
1652 switch (Inst.getOpcode()) {
1655 case ARM::STRD_POST:
1658 case ARM::LDRD_POST:
1659 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
1660 return MCDisassembler::Fail;
1667 // On loads, the writeback operand comes after Rt.
1668 switch (Inst.getOpcode()) {
1671 case ARM::LDRD_POST:
1674 case ARM::LDRH_POST:
1676 case ARM::LDRSH_PRE:
1677 case ARM::LDRSH_POST:
1679 case ARM::LDRSB_PRE:
1680 case ARM::LDRSB_POST:
1683 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1684 return MCDisassembler::Fail;
1691 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1692 return MCDisassembler::Fail;
1695 Inst.addOperand(MCOperand::CreateReg(0));
1696 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1698 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1699 return MCDisassembler::Fail;
1700 Inst.addOperand(MCOperand::CreateImm(U));
1703 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1704 return MCDisassembler::Fail;
1709 static DecodeStatus DecodeRFEInstruction(MCInst &Inst, unsigned Insn,
1710 uint64_t Address, const void *Decoder) {
1711 DecodeStatus S = MCDisassembler::Success;
1713 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1714 unsigned mode = fieldFromInstruction(Insn, 23, 2);
1731 Inst.addOperand(MCOperand::CreateImm(mode));
1732 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1733 return MCDisassembler::Fail;
1738 static DecodeStatus DecodeQADDInstruction(MCInst &Inst, unsigned Insn,
1739 uint64_t Address, const void *Decoder) {
1740 DecodeStatus S = MCDisassembler::Success;
1742 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
1743 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1744 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1745 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1748 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
1750 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1751 return MCDisassembler::Fail;
1752 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1753 return MCDisassembler::Fail;
1754 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
1755 return MCDisassembler::Fail;
1756 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1757 return MCDisassembler::Fail;
1761 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst &Inst,
1763 uint64_t Address, const void *Decoder) {
1764 DecodeStatus S = MCDisassembler::Success;
1766 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1767 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1768 unsigned reglist = fieldFromInstruction(Insn, 0, 16);
1771 switch (Inst.getOpcode()) {
1773 Inst.setOpcode(ARM::RFEDA);
1775 case ARM::LDMDA_UPD:
1776 Inst.setOpcode(ARM::RFEDA_UPD);
1779 Inst.setOpcode(ARM::RFEDB);
1781 case ARM::LDMDB_UPD:
1782 Inst.setOpcode(ARM::RFEDB_UPD);
1785 Inst.setOpcode(ARM::RFEIA);
1787 case ARM::LDMIA_UPD:
1788 Inst.setOpcode(ARM::RFEIA_UPD);
1791 Inst.setOpcode(ARM::RFEIB);
1793 case ARM::LDMIB_UPD:
1794 Inst.setOpcode(ARM::RFEIB_UPD);
1797 Inst.setOpcode(ARM::SRSDA);
1799 case ARM::STMDA_UPD:
1800 Inst.setOpcode(ARM::SRSDA_UPD);
1803 Inst.setOpcode(ARM::SRSDB);
1805 case ARM::STMDB_UPD:
1806 Inst.setOpcode(ARM::SRSDB_UPD);
1809 Inst.setOpcode(ARM::SRSIA);
1811 case ARM::STMIA_UPD:
1812 Inst.setOpcode(ARM::SRSIA_UPD);
1815 Inst.setOpcode(ARM::SRSIB);
1817 case ARM::STMIB_UPD:
1818 Inst.setOpcode(ARM::SRSIB_UPD);
1821 if (!Check(S, MCDisassembler::Fail)) return MCDisassembler::Fail;
1824 // For stores (which become SRS's, the only operand is the mode.
1825 if (fieldFromInstruction(Insn, 20, 1) == 0) {
1827 MCOperand::CreateImm(fieldFromInstruction(Insn, 0, 4)));
1831 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1834 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1835 return MCDisassembler::Fail;
1836 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1837 return MCDisassembler::Fail; // Tied
1838 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1839 return MCDisassembler::Fail;
1840 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
1841 return MCDisassembler::Fail;
1846 static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
1847 uint64_t Address, const void *Decoder) {
1848 unsigned imod = fieldFromInstruction(Insn, 18, 2);
1849 unsigned M = fieldFromInstruction(Insn, 17, 1);
1850 unsigned iflags = fieldFromInstruction(Insn, 6, 3);
1851 unsigned mode = fieldFromInstruction(Insn, 0, 5);
1853 DecodeStatus S = MCDisassembler::Success;
1855 // This decoder is called from multiple location that do not check
1856 // the full encoding is valid before they do.
1857 if (fieldFromInstruction(Insn, 5, 1) != 0 ||
1858 fieldFromInstruction(Insn, 16, 1) != 0 ||
1859 fieldFromInstruction(Insn, 20, 8) != 0x10)
1860 return MCDisassembler::Fail;
1862 // imod == '01' --> UNPREDICTABLE
1863 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1864 // return failure here. The '01' imod value is unprintable, so there's
1865 // nothing useful we could do even if we returned UNPREDICTABLE.
1867 if (imod == 1) return MCDisassembler::Fail;
1870 Inst.setOpcode(ARM::CPS3p);
1871 Inst.addOperand(MCOperand::CreateImm(imod));
1872 Inst.addOperand(MCOperand::CreateImm(iflags));
1873 Inst.addOperand(MCOperand::CreateImm(mode));
1874 } else if (imod && !M) {
1875 Inst.setOpcode(ARM::CPS2p);
1876 Inst.addOperand(MCOperand::CreateImm(imod));
1877 Inst.addOperand(MCOperand::CreateImm(iflags));
1878 if (mode) S = MCDisassembler::SoftFail;
1879 } else if (!imod && M) {
1880 Inst.setOpcode(ARM::CPS1p);
1881 Inst.addOperand(MCOperand::CreateImm(mode));
1882 if (iflags) S = MCDisassembler::SoftFail;
1884 // imod == '00' && M == '0' --> UNPREDICTABLE
1885 Inst.setOpcode(ARM::CPS1p);
1886 Inst.addOperand(MCOperand::CreateImm(mode));
1887 S = MCDisassembler::SoftFail;
1893 static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
1894 uint64_t Address, const void *Decoder) {
1895 unsigned imod = fieldFromInstruction(Insn, 9, 2);
1896 unsigned M = fieldFromInstruction(Insn, 8, 1);
1897 unsigned iflags = fieldFromInstruction(Insn, 5, 3);
1898 unsigned mode = fieldFromInstruction(Insn, 0, 5);
1900 DecodeStatus S = MCDisassembler::Success;
1902 // imod == '01' --> UNPREDICTABLE
1903 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1904 // return failure here. The '01' imod value is unprintable, so there's
1905 // nothing useful we could do even if we returned UNPREDICTABLE.
1907 if (imod == 1) return MCDisassembler::Fail;
1910 Inst.setOpcode(ARM::t2CPS3p);
1911 Inst.addOperand(MCOperand::CreateImm(imod));
1912 Inst.addOperand(MCOperand::CreateImm(iflags));
1913 Inst.addOperand(MCOperand::CreateImm(mode));
1914 } else if (imod && !M) {
1915 Inst.setOpcode(ARM::t2CPS2p);
1916 Inst.addOperand(MCOperand::CreateImm(imod));
1917 Inst.addOperand(MCOperand::CreateImm(iflags));
1918 if (mode) S = MCDisassembler::SoftFail;
1919 } else if (!imod && M) {
1920 Inst.setOpcode(ARM::t2CPS1p);
1921 Inst.addOperand(MCOperand::CreateImm(mode));
1922 if (iflags) S = MCDisassembler::SoftFail;
1924 // imod == '00' && M == '0' --> this is a HINT instruction
1925 int imm = fieldFromInstruction(Insn, 0, 8);
1926 // HINT are defined only for immediate in [0..4]
1927 if(imm > 4) return MCDisassembler::Fail;
1928 Inst.setOpcode(ARM::t2HINT);
1929 Inst.addOperand(MCOperand::CreateImm(imm));
1935 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
1936 uint64_t Address, const void *Decoder) {
1937 DecodeStatus S = MCDisassembler::Success;
1939 unsigned Rd = fieldFromInstruction(Insn, 8, 4);
1942 imm |= (fieldFromInstruction(Insn, 0, 8) << 0);
1943 imm |= (fieldFromInstruction(Insn, 12, 3) << 8);
1944 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
1945 imm |= (fieldFromInstruction(Insn, 26, 1) << 11);
1947 if (Inst.getOpcode() == ARM::t2MOVTi16)
1948 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1949 return MCDisassembler::Fail;
1950 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1951 return MCDisassembler::Fail;
1953 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
1954 Inst.addOperand(MCOperand::CreateImm(imm));
1959 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
1960 uint64_t Address, const void *Decoder) {
1961 DecodeStatus S = MCDisassembler::Success;
1963 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
1964 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1967 imm |= (fieldFromInstruction(Insn, 0, 12) << 0);
1968 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
1970 if (Inst.getOpcode() == ARM::MOVTi16)
1971 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1972 return MCDisassembler::Fail;
1974 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1975 return MCDisassembler::Fail;
1977 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
1978 Inst.addOperand(MCOperand::CreateImm(imm));
1980 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1981 return MCDisassembler::Fail;
1986 static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
1987 uint64_t Address, const void *Decoder) {
1988 DecodeStatus S = MCDisassembler::Success;
1990 unsigned Rd = fieldFromInstruction(Insn, 16, 4);
1991 unsigned Rn = fieldFromInstruction(Insn, 0, 4);
1992 unsigned Rm = fieldFromInstruction(Insn, 8, 4);
1993 unsigned Ra = fieldFromInstruction(Insn, 12, 4);
1994 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1997 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
1999 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2000 return MCDisassembler::Fail;
2001 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
2002 return MCDisassembler::Fail;
2003 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
2004 return MCDisassembler::Fail;
2005 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
2006 return MCDisassembler::Fail;
2008 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2009 return MCDisassembler::Fail;
2014 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
2015 uint64_t Address, const void *Decoder) {
2016 DecodeStatus S = MCDisassembler::Success;
2018 unsigned add = fieldFromInstruction(Val, 12, 1);
2019 unsigned imm = fieldFromInstruction(Val, 0, 12);
2020 unsigned Rn = fieldFromInstruction(Val, 13, 4);
2022 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2023 return MCDisassembler::Fail;
2025 if (!add) imm *= -1;
2026 if (imm == 0 && !add) imm = INT32_MIN;
2027 Inst.addOperand(MCOperand::CreateImm(imm));
2029 tryAddingPcLoadReferenceComment(Address, Address + imm + 8, Decoder);
2034 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
2035 uint64_t Address, const void *Decoder) {
2036 DecodeStatus S = MCDisassembler::Success;
2038 unsigned Rn = fieldFromInstruction(Val, 9, 4);
2039 unsigned U = fieldFromInstruction(Val, 8, 1);
2040 unsigned imm = fieldFromInstruction(Val, 0, 8);
2042 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2043 return MCDisassembler::Fail;
2046 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
2048 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
2053 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
2054 uint64_t Address, const void *Decoder) {
2055 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
2059 DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
2060 uint64_t Address, const void *Decoder) {
2061 DecodeStatus Status = MCDisassembler::Success;
2063 // Note the J1 and J2 values are from the encoded instruction. So here
2064 // change them to I1 and I2 values via as documented:
2065 // I1 = NOT(J1 EOR S);
2066 // I2 = NOT(J2 EOR S);
2067 // and build the imm32 with one trailing zero as documented:
2068 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
2069 unsigned S = fieldFromInstruction(Insn, 26, 1);
2070 unsigned J1 = fieldFromInstruction(Insn, 13, 1);
2071 unsigned J2 = fieldFromInstruction(Insn, 11, 1);
2072 unsigned I1 = !(J1 ^ S);
2073 unsigned I2 = !(J2 ^ S);
2074 unsigned imm10 = fieldFromInstruction(Insn, 16, 10);
2075 unsigned imm11 = fieldFromInstruction(Insn, 0, 11);
2076 unsigned tmp = (S << 23) | (I1 << 22) | (I2 << 21) | (imm10 << 11) | imm11;
2077 int imm32 = SignExtend32<24>(tmp << 1);
2078 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
2079 true, 4, Inst, Decoder))
2080 Inst.addOperand(MCOperand::CreateImm(imm32));
2086 DecodeBranchImmInstruction(MCInst &Inst, unsigned Insn,
2087 uint64_t Address, const void *Decoder) {
2088 DecodeStatus S = MCDisassembler::Success;
2090 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2091 unsigned imm = fieldFromInstruction(Insn, 0, 24) << 2;
2094 Inst.setOpcode(ARM::BLXi);
2095 imm |= fieldFromInstruction(Insn, 24, 1) << 1;
2096 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2097 true, 4, Inst, Decoder))
2098 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2102 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2103 true, 4, Inst, Decoder))
2104 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2105 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2106 return MCDisassembler::Fail;
2112 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
2113 uint64_t Address, const void *Decoder) {
2114 DecodeStatus S = MCDisassembler::Success;
2116 unsigned Rm = fieldFromInstruction(Val, 0, 4);
2117 unsigned align = fieldFromInstruction(Val, 4, 2);
2119 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2120 return MCDisassembler::Fail;
2122 Inst.addOperand(MCOperand::CreateImm(0));
2124 Inst.addOperand(MCOperand::CreateImm(4 << align));
2129 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Insn,
2130 uint64_t Address, const void *Decoder) {
2131 DecodeStatus S = MCDisassembler::Success;
2133 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2134 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2135 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2136 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2137 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2138 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2140 // First output register
2141 switch (Inst.getOpcode()) {
2142 case ARM::VLD1q16: case ARM::VLD1q32: case ARM::VLD1q64: case ARM::VLD1q8:
2143 case ARM::VLD1q16wb_fixed: case ARM::VLD1q16wb_register:
2144 case ARM::VLD1q32wb_fixed: case ARM::VLD1q32wb_register:
2145 case ARM::VLD1q64wb_fixed: case ARM::VLD1q64wb_register:
2146 case ARM::VLD1q8wb_fixed: case ARM::VLD1q8wb_register:
2147 case ARM::VLD2d16: case ARM::VLD2d32: case ARM::VLD2d8:
2148 case ARM::VLD2d16wb_fixed: case ARM::VLD2d16wb_register:
2149 case ARM::VLD2d32wb_fixed: case ARM::VLD2d32wb_register:
2150 case ARM::VLD2d8wb_fixed: case ARM::VLD2d8wb_register:
2151 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2152 return MCDisassembler::Fail;
2157 case ARM::VLD2b16wb_fixed:
2158 case ARM::VLD2b16wb_register:
2159 case ARM::VLD2b32wb_fixed:
2160 case ARM::VLD2b32wb_register:
2161 case ARM::VLD2b8wb_fixed:
2162 case ARM::VLD2b8wb_register:
2163 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2164 return MCDisassembler::Fail;
2167 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2168 return MCDisassembler::Fail;
2171 // Second output register
2172 switch (Inst.getOpcode()) {
2176 case ARM::VLD3d8_UPD:
2177 case ARM::VLD3d16_UPD:
2178 case ARM::VLD3d32_UPD:
2182 case ARM::VLD4d8_UPD:
2183 case ARM::VLD4d16_UPD:
2184 case ARM::VLD4d32_UPD:
2185 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2186 return MCDisassembler::Fail;
2191 case ARM::VLD3q8_UPD:
2192 case ARM::VLD3q16_UPD:
2193 case ARM::VLD3q32_UPD:
2197 case ARM::VLD4q8_UPD:
2198 case ARM::VLD4q16_UPD:
2199 case ARM::VLD4q32_UPD:
2200 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2201 return MCDisassembler::Fail;
2206 // Third output register
2207 switch(Inst.getOpcode()) {
2211 case ARM::VLD3d8_UPD:
2212 case ARM::VLD3d16_UPD:
2213 case ARM::VLD3d32_UPD:
2217 case ARM::VLD4d8_UPD:
2218 case ARM::VLD4d16_UPD:
2219 case ARM::VLD4d32_UPD:
2220 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2221 return MCDisassembler::Fail;
2226 case ARM::VLD3q8_UPD:
2227 case ARM::VLD3q16_UPD:
2228 case ARM::VLD3q32_UPD:
2232 case ARM::VLD4q8_UPD:
2233 case ARM::VLD4q16_UPD:
2234 case ARM::VLD4q32_UPD:
2235 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2236 return MCDisassembler::Fail;
2242 // Fourth output register
2243 switch (Inst.getOpcode()) {
2247 case ARM::VLD4d8_UPD:
2248 case ARM::VLD4d16_UPD:
2249 case ARM::VLD4d32_UPD:
2250 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2251 return MCDisassembler::Fail;
2256 case ARM::VLD4q8_UPD:
2257 case ARM::VLD4q16_UPD:
2258 case ARM::VLD4q32_UPD:
2259 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2260 return MCDisassembler::Fail;
2266 // Writeback operand
2267 switch (Inst.getOpcode()) {
2268 case ARM::VLD1d8wb_fixed:
2269 case ARM::VLD1d16wb_fixed:
2270 case ARM::VLD1d32wb_fixed:
2271 case ARM::VLD1d64wb_fixed:
2272 case ARM::VLD1d8wb_register:
2273 case ARM::VLD1d16wb_register:
2274 case ARM::VLD1d32wb_register:
2275 case ARM::VLD1d64wb_register:
2276 case ARM::VLD1q8wb_fixed:
2277 case ARM::VLD1q16wb_fixed:
2278 case ARM::VLD1q32wb_fixed:
2279 case ARM::VLD1q64wb_fixed:
2280 case ARM::VLD1q8wb_register:
2281 case ARM::VLD1q16wb_register:
2282 case ARM::VLD1q32wb_register:
2283 case ARM::VLD1q64wb_register:
2284 case ARM::VLD1d8Twb_fixed:
2285 case ARM::VLD1d8Twb_register:
2286 case ARM::VLD1d16Twb_fixed:
2287 case ARM::VLD1d16Twb_register:
2288 case ARM::VLD1d32Twb_fixed:
2289 case ARM::VLD1d32Twb_register:
2290 case ARM::VLD1d64Twb_fixed:
2291 case ARM::VLD1d64Twb_register:
2292 case ARM::VLD1d8Qwb_fixed:
2293 case ARM::VLD1d8Qwb_register:
2294 case ARM::VLD1d16Qwb_fixed:
2295 case ARM::VLD1d16Qwb_register:
2296 case ARM::VLD1d32Qwb_fixed:
2297 case ARM::VLD1d32Qwb_register:
2298 case ARM::VLD1d64Qwb_fixed:
2299 case ARM::VLD1d64Qwb_register:
2300 case ARM::VLD2d8wb_fixed:
2301 case ARM::VLD2d16wb_fixed:
2302 case ARM::VLD2d32wb_fixed:
2303 case ARM::VLD2q8wb_fixed:
2304 case ARM::VLD2q16wb_fixed:
2305 case ARM::VLD2q32wb_fixed:
2306 case ARM::VLD2d8wb_register:
2307 case ARM::VLD2d16wb_register:
2308 case ARM::VLD2d32wb_register:
2309 case ARM::VLD2q8wb_register:
2310 case ARM::VLD2q16wb_register:
2311 case ARM::VLD2q32wb_register:
2312 case ARM::VLD2b8wb_fixed:
2313 case ARM::VLD2b16wb_fixed:
2314 case ARM::VLD2b32wb_fixed:
2315 case ARM::VLD2b8wb_register:
2316 case ARM::VLD2b16wb_register:
2317 case ARM::VLD2b32wb_register:
2318 Inst.addOperand(MCOperand::CreateImm(0));
2320 case ARM::VLD3d8_UPD:
2321 case ARM::VLD3d16_UPD:
2322 case ARM::VLD3d32_UPD:
2323 case ARM::VLD3q8_UPD:
2324 case ARM::VLD3q16_UPD:
2325 case ARM::VLD3q32_UPD:
2326 case ARM::VLD4d8_UPD:
2327 case ARM::VLD4d16_UPD:
2328 case ARM::VLD4d32_UPD:
2329 case ARM::VLD4q8_UPD:
2330 case ARM::VLD4q16_UPD:
2331 case ARM::VLD4q32_UPD:
2332 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2333 return MCDisassembler::Fail;
2339 // AddrMode6 Base (register+alignment)
2340 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2341 return MCDisassembler::Fail;
2343 // AddrMode6 Offset (register)
2344 switch (Inst.getOpcode()) {
2346 // The below have been updated to have explicit am6offset split
2347 // between fixed and register offset. For those instructions not
2348 // yet updated, we need to add an additional reg0 operand for the
2351 // The fixed offset encodes as Rm == 0xd, so we check for that.
2353 Inst.addOperand(MCOperand::CreateReg(0));
2356 // Fall through to handle the register offset variant.
2357 case ARM::VLD1d8wb_fixed:
2358 case ARM::VLD1d16wb_fixed:
2359 case ARM::VLD1d32wb_fixed:
2360 case ARM::VLD1d64wb_fixed:
2361 case ARM::VLD1d8Twb_fixed:
2362 case ARM::VLD1d16Twb_fixed:
2363 case ARM::VLD1d32Twb_fixed:
2364 case ARM::VLD1d64Twb_fixed:
2365 case ARM::VLD1d8Qwb_fixed:
2366 case ARM::VLD1d16Qwb_fixed:
2367 case ARM::VLD1d32Qwb_fixed:
2368 case ARM::VLD1d64Qwb_fixed:
2369 case ARM::VLD1d8wb_register:
2370 case ARM::VLD1d16wb_register:
2371 case ARM::VLD1d32wb_register:
2372 case ARM::VLD1d64wb_register:
2373 case ARM::VLD1q8wb_fixed:
2374 case ARM::VLD1q16wb_fixed:
2375 case ARM::VLD1q32wb_fixed:
2376 case ARM::VLD1q64wb_fixed:
2377 case ARM::VLD1q8wb_register:
2378 case ARM::VLD1q16wb_register:
2379 case ARM::VLD1q32wb_register:
2380 case ARM::VLD1q64wb_register:
2381 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2382 // variant encodes Rm == 0xf. Anything else is a register offset post-
2383 // increment and we need to add the register operand to the instruction.
2384 if (Rm != 0xD && Rm != 0xF &&
2385 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2386 return MCDisassembler::Fail;
2388 case ARM::VLD2d8wb_fixed:
2389 case ARM::VLD2d16wb_fixed:
2390 case ARM::VLD2d32wb_fixed:
2391 case ARM::VLD2b8wb_fixed:
2392 case ARM::VLD2b16wb_fixed:
2393 case ARM::VLD2b32wb_fixed:
2394 case ARM::VLD2q8wb_fixed:
2395 case ARM::VLD2q16wb_fixed:
2396 case ARM::VLD2q32wb_fixed:
2403 static DecodeStatus DecodeVST1Instruction(MCInst& Inst, unsigned Insn,
2404 uint64_t Addr, const void* Decoder) {
2405 unsigned type = fieldFromInstruction(Insn, 8, 4);
2406 unsigned align = fieldFromInstruction(Insn, 4, 2);
2407 if(type == 7 && (align & 2)) return MCDisassembler::Fail;
2408 if(type == 10 && align == 3) return MCDisassembler::Fail;
2409 if(type == 6 && (align & 2)) return MCDisassembler::Fail;
2411 return DecodeVSTInstruction(Inst, Insn, Addr, Decoder);
2414 static DecodeStatus DecodeVST2Instruction(MCInst& Inst, unsigned Insn,
2415 uint64_t Addr, const void* Decoder) {
2416 unsigned size = fieldFromInstruction(Insn, 6, 2);
2417 if(size == 3) return MCDisassembler::Fail;
2419 unsigned type = fieldFromInstruction(Insn, 8, 4);
2420 unsigned align = fieldFromInstruction(Insn, 4, 2);
2421 if(type == 8 && align == 3) return MCDisassembler::Fail;
2422 if(type == 9 && align == 3) return MCDisassembler::Fail;
2424 return DecodeVSTInstruction(Inst, Insn, Addr, Decoder);
2427 static DecodeStatus DecodeVST3Instruction(MCInst& Inst, unsigned Insn,
2428 uint64_t Addr, const void* Decoder) {
2429 unsigned size = fieldFromInstruction(Insn, 6, 2);
2430 if(size == 3) return MCDisassembler::Fail;
2432 unsigned align = fieldFromInstruction(Insn, 4, 2);
2433 if(align & 2) return MCDisassembler::Fail;
2435 return DecodeVSTInstruction(Inst, Insn, Addr, Decoder);
2438 static DecodeStatus DecodeVST4Instruction(MCInst& Inst, unsigned Insn,
2439 uint64_t Addr, const void* Decoder) {
2440 unsigned size = fieldFromInstruction(Insn, 6, 2);
2441 if(size == 3) return MCDisassembler::Fail;
2443 return DecodeVSTInstruction(Inst, Insn, Addr, Decoder);
2446 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Insn,
2447 uint64_t Address, const void *Decoder) {
2448 DecodeStatus S = MCDisassembler::Success;
2450 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2451 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2452 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2453 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2454 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2455 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2457 // Writeback Operand
2458 switch (Inst.getOpcode()) {
2459 case ARM::VST1d8wb_fixed:
2460 case ARM::VST1d16wb_fixed:
2461 case ARM::VST1d32wb_fixed:
2462 case ARM::VST1d64wb_fixed:
2463 case ARM::VST1d8wb_register:
2464 case ARM::VST1d16wb_register:
2465 case ARM::VST1d32wb_register:
2466 case ARM::VST1d64wb_register:
2467 case ARM::VST1q8wb_fixed:
2468 case ARM::VST1q16wb_fixed:
2469 case ARM::VST1q32wb_fixed:
2470 case ARM::VST1q64wb_fixed:
2471 case ARM::VST1q8wb_register:
2472 case ARM::VST1q16wb_register:
2473 case ARM::VST1q32wb_register:
2474 case ARM::VST1q64wb_register:
2475 case ARM::VST1d8Twb_fixed:
2476 case ARM::VST1d16Twb_fixed:
2477 case ARM::VST1d32Twb_fixed:
2478 case ARM::VST1d64Twb_fixed:
2479 case ARM::VST1d8Twb_register:
2480 case ARM::VST1d16Twb_register:
2481 case ARM::VST1d32Twb_register:
2482 case ARM::VST1d64Twb_register:
2483 case ARM::VST1d8Qwb_fixed:
2484 case ARM::VST1d16Qwb_fixed:
2485 case ARM::VST1d32Qwb_fixed:
2486 case ARM::VST1d64Qwb_fixed:
2487 case ARM::VST1d8Qwb_register:
2488 case ARM::VST1d16Qwb_register:
2489 case ARM::VST1d32Qwb_register:
2490 case ARM::VST1d64Qwb_register:
2491 case ARM::VST2d8wb_fixed:
2492 case ARM::VST2d16wb_fixed:
2493 case ARM::VST2d32wb_fixed:
2494 case ARM::VST2d8wb_register:
2495 case ARM::VST2d16wb_register:
2496 case ARM::VST2d32wb_register:
2497 case ARM::VST2q8wb_fixed:
2498 case ARM::VST2q16wb_fixed:
2499 case ARM::VST2q32wb_fixed:
2500 case ARM::VST2q8wb_register:
2501 case ARM::VST2q16wb_register:
2502 case ARM::VST2q32wb_register:
2503 case ARM::VST2b8wb_fixed:
2504 case ARM::VST2b16wb_fixed:
2505 case ARM::VST2b32wb_fixed:
2506 case ARM::VST2b8wb_register:
2507 case ARM::VST2b16wb_register:
2508 case ARM::VST2b32wb_register:
2510 return MCDisassembler::Fail;
2511 Inst.addOperand(MCOperand::CreateImm(0));
2513 case ARM::VST3d8_UPD:
2514 case ARM::VST3d16_UPD:
2515 case ARM::VST3d32_UPD:
2516 case ARM::VST3q8_UPD:
2517 case ARM::VST3q16_UPD:
2518 case ARM::VST3q32_UPD:
2519 case ARM::VST4d8_UPD:
2520 case ARM::VST4d16_UPD:
2521 case ARM::VST4d32_UPD:
2522 case ARM::VST4q8_UPD:
2523 case ARM::VST4q16_UPD:
2524 case ARM::VST4q32_UPD:
2525 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2526 return MCDisassembler::Fail;
2532 // AddrMode6 Base (register+alignment)
2533 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2534 return MCDisassembler::Fail;
2536 // AddrMode6 Offset (register)
2537 switch (Inst.getOpcode()) {
2540 Inst.addOperand(MCOperand::CreateReg(0));
2541 else if (Rm != 0xF) {
2542 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2543 return MCDisassembler::Fail;
2546 case ARM::VST1d8wb_fixed:
2547 case ARM::VST1d16wb_fixed:
2548 case ARM::VST1d32wb_fixed:
2549 case ARM::VST1d64wb_fixed:
2550 case ARM::VST1q8wb_fixed:
2551 case ARM::VST1q16wb_fixed:
2552 case ARM::VST1q32wb_fixed:
2553 case ARM::VST1q64wb_fixed:
2554 case ARM::VST1d8Twb_fixed:
2555 case ARM::VST1d16Twb_fixed:
2556 case ARM::VST1d32Twb_fixed:
2557 case ARM::VST1d64Twb_fixed:
2558 case ARM::VST1d8Qwb_fixed:
2559 case ARM::VST1d16Qwb_fixed:
2560 case ARM::VST1d32Qwb_fixed:
2561 case ARM::VST1d64Qwb_fixed:
2562 case ARM::VST2d8wb_fixed:
2563 case ARM::VST2d16wb_fixed:
2564 case ARM::VST2d32wb_fixed:
2565 case ARM::VST2q8wb_fixed:
2566 case ARM::VST2q16wb_fixed:
2567 case ARM::VST2q32wb_fixed:
2568 case ARM::VST2b8wb_fixed:
2569 case ARM::VST2b16wb_fixed:
2570 case ARM::VST2b32wb_fixed:
2575 // First input register
2576 switch (Inst.getOpcode()) {
2581 case ARM::VST1q16wb_fixed:
2582 case ARM::VST1q16wb_register:
2583 case ARM::VST1q32wb_fixed:
2584 case ARM::VST1q32wb_register:
2585 case ARM::VST1q64wb_fixed:
2586 case ARM::VST1q64wb_register:
2587 case ARM::VST1q8wb_fixed:
2588 case ARM::VST1q8wb_register:
2592 case ARM::VST2d16wb_fixed:
2593 case ARM::VST2d16wb_register:
2594 case ARM::VST2d32wb_fixed:
2595 case ARM::VST2d32wb_register:
2596 case ARM::VST2d8wb_fixed:
2597 case ARM::VST2d8wb_register:
2598 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2599 return MCDisassembler::Fail;
2604 case ARM::VST2b16wb_fixed:
2605 case ARM::VST2b16wb_register:
2606 case ARM::VST2b32wb_fixed:
2607 case ARM::VST2b32wb_register:
2608 case ARM::VST2b8wb_fixed:
2609 case ARM::VST2b8wb_register:
2610 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2611 return MCDisassembler::Fail;
2614 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2615 return MCDisassembler::Fail;
2618 // Second input register
2619 switch (Inst.getOpcode()) {
2623 case ARM::VST3d8_UPD:
2624 case ARM::VST3d16_UPD:
2625 case ARM::VST3d32_UPD:
2629 case ARM::VST4d8_UPD:
2630 case ARM::VST4d16_UPD:
2631 case ARM::VST4d32_UPD:
2632 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2633 return MCDisassembler::Fail;
2638 case ARM::VST3q8_UPD:
2639 case ARM::VST3q16_UPD:
2640 case ARM::VST3q32_UPD:
2644 case ARM::VST4q8_UPD:
2645 case ARM::VST4q16_UPD:
2646 case ARM::VST4q32_UPD:
2647 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2648 return MCDisassembler::Fail;
2654 // Third input register
2655 switch (Inst.getOpcode()) {
2659 case ARM::VST3d8_UPD:
2660 case ARM::VST3d16_UPD:
2661 case ARM::VST3d32_UPD:
2665 case ARM::VST4d8_UPD:
2666 case ARM::VST4d16_UPD:
2667 case ARM::VST4d32_UPD:
2668 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2669 return MCDisassembler::Fail;
2674 case ARM::VST3q8_UPD:
2675 case ARM::VST3q16_UPD:
2676 case ARM::VST3q32_UPD:
2680 case ARM::VST4q8_UPD:
2681 case ARM::VST4q16_UPD:
2682 case ARM::VST4q32_UPD:
2683 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2684 return MCDisassembler::Fail;
2690 // Fourth input register
2691 switch (Inst.getOpcode()) {
2695 case ARM::VST4d8_UPD:
2696 case ARM::VST4d16_UPD:
2697 case ARM::VST4d32_UPD:
2698 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2699 return MCDisassembler::Fail;
2704 case ARM::VST4q8_UPD:
2705 case ARM::VST4q16_UPD:
2706 case ARM::VST4q32_UPD:
2707 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2708 return MCDisassembler::Fail;
2717 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Insn,
2718 uint64_t Address, const void *Decoder) {
2719 DecodeStatus S = MCDisassembler::Success;
2721 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2722 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2723 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2724 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2725 unsigned align = fieldFromInstruction(Insn, 4, 1);
2726 unsigned size = fieldFromInstruction(Insn, 6, 2);
2728 if (size == 0 && align == 1)
2729 return MCDisassembler::Fail;
2730 align *= (1 << size);
2732 switch (Inst.getOpcode()) {
2733 case ARM::VLD1DUPq16: case ARM::VLD1DUPq32: case ARM::VLD1DUPq8:
2734 case ARM::VLD1DUPq16wb_fixed: case ARM::VLD1DUPq16wb_register:
2735 case ARM::VLD1DUPq32wb_fixed: case ARM::VLD1DUPq32wb_register:
2736 case ARM::VLD1DUPq8wb_fixed: case ARM::VLD1DUPq8wb_register:
2737 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2738 return MCDisassembler::Fail;
2741 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2742 return MCDisassembler::Fail;
2746 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2747 return MCDisassembler::Fail;
2750 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2751 return MCDisassembler::Fail;
2752 Inst.addOperand(MCOperand::CreateImm(align));
2754 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2755 // variant encodes Rm == 0xf. Anything else is a register offset post-
2756 // increment and we need to add the register operand to the instruction.
2757 if (Rm != 0xD && Rm != 0xF &&
2758 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2759 return MCDisassembler::Fail;
2764 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Insn,
2765 uint64_t Address, const void *Decoder) {
2766 DecodeStatus S = MCDisassembler::Success;
2768 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2769 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2770 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2771 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2772 unsigned align = fieldFromInstruction(Insn, 4, 1);
2773 unsigned size = 1 << fieldFromInstruction(Insn, 6, 2);
2776 switch (Inst.getOpcode()) {
2777 case ARM::VLD2DUPd16: case ARM::VLD2DUPd32: case ARM::VLD2DUPd8:
2778 case ARM::VLD2DUPd16wb_fixed: case ARM::VLD2DUPd16wb_register:
2779 case ARM::VLD2DUPd32wb_fixed: case ARM::VLD2DUPd32wb_register:
2780 case ARM::VLD2DUPd8wb_fixed: case ARM::VLD2DUPd8wb_register:
2781 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2782 return MCDisassembler::Fail;
2784 case ARM::VLD2DUPd16x2: case ARM::VLD2DUPd32x2: case ARM::VLD2DUPd8x2:
2785 case ARM::VLD2DUPd16x2wb_fixed: case ARM::VLD2DUPd16x2wb_register:
2786 case ARM::VLD2DUPd32x2wb_fixed: case ARM::VLD2DUPd32x2wb_register:
2787 case ARM::VLD2DUPd8x2wb_fixed: case ARM::VLD2DUPd8x2wb_register:
2788 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2789 return MCDisassembler::Fail;
2792 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2793 return MCDisassembler::Fail;
2798 Inst.addOperand(MCOperand::CreateImm(0));
2800 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2801 return MCDisassembler::Fail;
2802 Inst.addOperand(MCOperand::CreateImm(align));
2804 if (Rm != 0xD && Rm != 0xF) {
2805 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2806 return MCDisassembler::Fail;
2812 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Insn,
2813 uint64_t Address, const void *Decoder) {
2814 DecodeStatus S = MCDisassembler::Success;
2816 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2817 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2818 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2819 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2820 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
2822 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2823 return MCDisassembler::Fail;
2824 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2825 return MCDisassembler::Fail;
2826 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2827 return MCDisassembler::Fail;
2829 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2830 return MCDisassembler::Fail;
2833 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2834 return MCDisassembler::Fail;
2835 Inst.addOperand(MCOperand::CreateImm(0));
2838 Inst.addOperand(MCOperand::CreateReg(0));
2839 else if (Rm != 0xF) {
2840 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2841 return MCDisassembler::Fail;
2847 static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Insn,
2848 uint64_t Address, const void *Decoder) {
2849 DecodeStatus S = MCDisassembler::Success;
2851 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2852 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2853 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2854 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2855 unsigned size = fieldFromInstruction(Insn, 6, 2);
2856 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
2857 unsigned align = fieldFromInstruction(Insn, 4, 1);
2861 return MCDisassembler::Fail;
2874 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2875 return MCDisassembler::Fail;
2876 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2877 return MCDisassembler::Fail;
2878 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2879 return MCDisassembler::Fail;
2880 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
2881 return MCDisassembler::Fail;
2883 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2884 return MCDisassembler::Fail;
2887 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2888 return MCDisassembler::Fail;
2889 Inst.addOperand(MCOperand::CreateImm(align));
2892 Inst.addOperand(MCOperand::CreateReg(0));
2893 else if (Rm != 0xF) {
2894 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2895 return MCDisassembler::Fail;
2902 DecodeNEONModImmInstruction(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 imm = fieldFromInstruction(Insn, 0, 4);
2909 imm |= fieldFromInstruction(Insn, 16, 3) << 4;
2910 imm |= fieldFromInstruction(Insn, 24, 1) << 7;
2911 imm |= fieldFromInstruction(Insn, 8, 4) << 8;
2912 imm |= fieldFromInstruction(Insn, 5, 1) << 12;
2913 unsigned Q = fieldFromInstruction(Insn, 6, 1);
2916 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2917 return MCDisassembler::Fail;
2919 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2920 return MCDisassembler::Fail;
2923 Inst.addOperand(MCOperand::CreateImm(imm));
2925 switch (Inst.getOpcode()) {
2926 case ARM::VORRiv4i16:
2927 case ARM::VORRiv2i32:
2928 case ARM::VBICiv4i16:
2929 case ARM::VBICiv2i32:
2930 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2931 return MCDisassembler::Fail;
2933 case ARM::VORRiv8i16:
2934 case ARM::VORRiv4i32:
2935 case ARM::VBICiv8i16:
2936 case ARM::VBICiv4i32:
2937 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2938 return MCDisassembler::Fail;
2947 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Insn,
2948 uint64_t Address, const void *Decoder) {
2949 DecodeStatus S = MCDisassembler::Success;
2951 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2952 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2953 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2954 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
2955 unsigned size = fieldFromInstruction(Insn, 18, 2);
2957 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2958 return MCDisassembler::Fail;
2959 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2960 return MCDisassembler::Fail;
2961 Inst.addOperand(MCOperand::CreateImm(8 << size));
2966 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
2967 uint64_t Address, const void *Decoder) {
2968 Inst.addOperand(MCOperand::CreateImm(8 - Val));
2969 return MCDisassembler::Success;
2972 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
2973 uint64_t Address, const void *Decoder) {
2974 Inst.addOperand(MCOperand::CreateImm(16 - Val));
2975 return MCDisassembler::Success;
2978 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
2979 uint64_t Address, const void *Decoder) {
2980 Inst.addOperand(MCOperand::CreateImm(32 - Val));
2981 return MCDisassembler::Success;
2984 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
2985 uint64_t Address, const void *Decoder) {
2986 Inst.addOperand(MCOperand::CreateImm(64 - Val));
2987 return MCDisassembler::Success;
2990 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
2991 uint64_t Address, const void *Decoder) {
2992 DecodeStatus S = MCDisassembler::Success;
2994 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2995 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2996 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2997 Rn |= fieldFromInstruction(Insn, 7, 1) << 4;
2998 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2999 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
3000 unsigned op = fieldFromInstruction(Insn, 6, 1);
3002 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3003 return MCDisassembler::Fail;
3005 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3006 return MCDisassembler::Fail; // Writeback
3009 switch (Inst.getOpcode()) {
3012 if (!Check(S, DecodeDPairRegisterClass(Inst, Rn, Address, Decoder)))
3013 return MCDisassembler::Fail;
3016 if (!Check(S, DecodeDPRRegisterClass(Inst, Rn, Address, Decoder)))
3017 return MCDisassembler::Fail;
3020 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
3021 return MCDisassembler::Fail;
3026 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
3027 uint64_t Address, const void *Decoder) {
3028 DecodeStatus S = MCDisassembler::Success;
3030 unsigned dst = fieldFromInstruction(Insn, 8, 3);
3031 unsigned imm = fieldFromInstruction(Insn, 0, 8);
3033 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
3034 return MCDisassembler::Fail;
3036 switch(Inst.getOpcode()) {
3038 return MCDisassembler::Fail;
3040 break; // tADR does not explicitly represent the PC as an operand.
3042 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3046 Inst.addOperand(MCOperand::CreateImm(imm));
3050 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
3051 uint64_t Address, const void *Decoder) {
3052 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<12>(Val<<1) + 4,
3053 true, 2, Inst, Decoder))
3054 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
3055 return MCDisassembler::Success;
3058 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
3059 uint64_t Address, const void *Decoder) {
3060 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<21>(Val) + 4,
3061 true, 4, Inst, Decoder))
3062 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
3063 return MCDisassembler::Success;
3066 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
3067 uint64_t Address, const void *Decoder) {
3068 if (!tryAddingSymbolicOperand(Address, Address + (Val<<1) + 4,
3069 true, 2, Inst, Decoder))
3070 Inst.addOperand(MCOperand::CreateImm(Val << 1));
3071 return MCDisassembler::Success;
3074 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
3075 uint64_t Address, const void *Decoder) {
3076 DecodeStatus S = MCDisassembler::Success;
3078 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3079 unsigned Rm = fieldFromInstruction(Val, 3, 3);
3081 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3082 return MCDisassembler::Fail;
3083 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
3084 return MCDisassembler::Fail;
3089 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
3090 uint64_t Address, const void *Decoder) {
3091 DecodeStatus S = MCDisassembler::Success;
3093 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3094 unsigned imm = fieldFromInstruction(Val, 3, 5);
3096 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3097 return MCDisassembler::Fail;
3098 Inst.addOperand(MCOperand::CreateImm(imm));
3103 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
3104 uint64_t Address, const void *Decoder) {
3105 unsigned imm = Val << 2;
3107 Inst.addOperand(MCOperand::CreateImm(imm));
3108 tryAddingPcLoadReferenceComment(Address, (Address & ~2u) + imm + 4, Decoder);
3110 return MCDisassembler::Success;
3113 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
3114 uint64_t Address, const void *Decoder) {
3115 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3116 Inst.addOperand(MCOperand::CreateImm(Val));
3118 return MCDisassembler::Success;
3121 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
3122 uint64_t Address, const void *Decoder) {
3123 DecodeStatus S = MCDisassembler::Success;
3125 unsigned Rn = fieldFromInstruction(Val, 6, 4);
3126 unsigned Rm = fieldFromInstruction(Val, 2, 4);
3127 unsigned imm = fieldFromInstruction(Val, 0, 2);
3129 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3130 return MCDisassembler::Fail;
3131 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3132 return MCDisassembler::Fail;
3133 Inst.addOperand(MCOperand::CreateImm(imm));
3138 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Insn,
3139 uint64_t Address, const void *Decoder) {
3140 DecodeStatus S = MCDisassembler::Success;
3142 switch (Inst.getOpcode()) {
3148 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3149 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3150 return MCDisassembler::Fail;
3154 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3156 switch (Inst.getOpcode()) {
3158 Inst.setOpcode(ARM::t2LDRBpci);
3161 Inst.setOpcode(ARM::t2LDRHpci);
3164 Inst.setOpcode(ARM::t2LDRSHpci);
3167 Inst.setOpcode(ARM::t2LDRSBpci);
3170 Inst.setOpcode(ARM::t2PLDi12);
3171 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
3174 return MCDisassembler::Fail;
3177 int imm = fieldFromInstruction(Insn, 0, 12);
3178 if (!fieldFromInstruction(Insn, 23, 1)) imm *= -1;
3179 Inst.addOperand(MCOperand::CreateImm(imm));
3184 unsigned addrmode = fieldFromInstruction(Insn, 4, 2);
3185 addrmode |= fieldFromInstruction(Insn, 0, 4) << 2;
3186 addrmode |= fieldFromInstruction(Insn, 16, 4) << 6;
3187 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
3188 return MCDisassembler::Fail;
3193 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
3194 uint64_t Address, const void *Decoder) {
3196 Inst.addOperand(MCOperand::CreateImm(INT32_MIN));
3198 int imm = Val & 0xFF;
3200 if (!(Val & 0x100)) imm *= -1;
3201 Inst.addOperand(MCOperand::CreateImm(imm * 4));
3204 return MCDisassembler::Success;
3207 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
3208 uint64_t Address, const void *Decoder) {
3209 DecodeStatus S = MCDisassembler::Success;
3211 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3212 unsigned imm = fieldFromInstruction(Val, 0, 9);
3214 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3215 return MCDisassembler::Fail;
3216 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
3217 return MCDisassembler::Fail;
3222 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
3223 uint64_t Address, const void *Decoder) {
3224 DecodeStatus S = MCDisassembler::Success;
3226 unsigned Rn = fieldFromInstruction(Val, 8, 4);
3227 unsigned imm = fieldFromInstruction(Val, 0, 8);
3229 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
3230 return MCDisassembler::Fail;
3232 Inst.addOperand(MCOperand::CreateImm(imm));
3237 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
3238 uint64_t Address, const void *Decoder) {
3239 int imm = Val & 0xFF;
3242 else if (!(Val & 0x100))
3244 Inst.addOperand(MCOperand::CreateImm(imm));
3246 return MCDisassembler::Success;
3250 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
3251 uint64_t Address, const void *Decoder) {
3252 DecodeStatus S = MCDisassembler::Success;
3254 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3255 unsigned imm = fieldFromInstruction(Val, 0, 9);
3257 // Some instructions always use an additive offset.
3258 switch (Inst.getOpcode()) {
3273 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3274 return MCDisassembler::Fail;
3275 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
3276 return MCDisassembler::Fail;
3281 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Insn,
3282 uint64_t Address, const void *Decoder) {
3283 DecodeStatus S = MCDisassembler::Success;
3285 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3286 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3287 unsigned addr = fieldFromInstruction(Insn, 0, 8);
3288 addr |= fieldFromInstruction(Insn, 9, 1) << 8;
3290 unsigned load = fieldFromInstruction(Insn, 20, 1);
3293 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3294 return MCDisassembler::Fail;
3297 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3298 return MCDisassembler::Fail;
3301 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3302 return MCDisassembler::Fail;
3305 if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
3306 return MCDisassembler::Fail;
3311 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
3312 uint64_t Address, const void *Decoder) {
3313 DecodeStatus S = MCDisassembler::Success;
3315 unsigned Rn = fieldFromInstruction(Val, 13, 4);
3316 unsigned imm = fieldFromInstruction(Val, 0, 12);
3318 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3319 return MCDisassembler::Fail;
3320 Inst.addOperand(MCOperand::CreateImm(imm));
3326 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Insn,
3327 uint64_t Address, const void *Decoder) {
3328 unsigned imm = fieldFromInstruction(Insn, 0, 7);
3330 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3331 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3332 Inst.addOperand(MCOperand::CreateImm(imm));
3334 return MCDisassembler::Success;
3337 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
3338 uint64_t Address, const void *Decoder) {
3339 DecodeStatus S = MCDisassembler::Success;
3341 if (Inst.getOpcode() == ARM::tADDrSP) {
3342 unsigned Rdm = fieldFromInstruction(Insn, 0, 3);
3343 Rdm |= fieldFromInstruction(Insn, 7, 1) << 3;
3345 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3346 return MCDisassembler::Fail;
3347 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3348 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3349 return MCDisassembler::Fail;
3350 } else if (Inst.getOpcode() == ARM::tADDspr) {
3351 unsigned Rm = fieldFromInstruction(Insn, 3, 4);
3353 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3354 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3355 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3356 return MCDisassembler::Fail;
3362 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
3363 uint64_t Address, const void *Decoder) {
3364 unsigned imod = fieldFromInstruction(Insn, 4, 1) | 0x2;
3365 unsigned flags = fieldFromInstruction(Insn, 0, 3);
3367 Inst.addOperand(MCOperand::CreateImm(imod));
3368 Inst.addOperand(MCOperand::CreateImm(flags));
3370 return MCDisassembler::Success;
3373 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
3374 uint64_t Address, const void *Decoder) {
3375 DecodeStatus S = MCDisassembler::Success;
3376 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3377 unsigned add = fieldFromInstruction(Insn, 4, 1);
3379 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
3380 return MCDisassembler::Fail;
3381 Inst.addOperand(MCOperand::CreateImm(add));
3386 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Val,
3387 uint64_t Address, const void *Decoder) {
3388 // Val is passed in as S:J1:J2:imm10H:imm10L:'0'
3389 // Note only one trailing zero not two. Also the J1 and J2 values are from
3390 // the encoded instruction. So here change to I1 and I2 values via:
3391 // I1 = NOT(J1 EOR S);
3392 // I2 = NOT(J2 EOR S);
3393 // and build the imm32 with two trailing zeros as documented:
3394 // imm32 = SignExtend(S:I1:I2:imm10H:imm10L:'00', 32);
3395 unsigned S = (Val >> 23) & 1;
3396 unsigned J1 = (Val >> 22) & 1;
3397 unsigned J2 = (Val >> 21) & 1;
3398 unsigned I1 = !(J1 ^ S);
3399 unsigned I2 = !(J2 ^ S);
3400 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
3401 int imm32 = SignExtend32<25>(tmp << 1);
3403 if (!tryAddingSymbolicOperand(Address,
3404 (Address & ~2u) + imm32 + 4,
3405 true, 4, Inst, Decoder))
3406 Inst.addOperand(MCOperand::CreateImm(imm32));
3407 return MCDisassembler::Success;
3410 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Val,
3411 uint64_t Address, const void *Decoder) {
3412 if (Val == 0xA || Val == 0xB)
3413 return MCDisassembler::Fail;
3415 Inst.addOperand(MCOperand::CreateImm(Val));
3416 return MCDisassembler::Success;
3420 DecodeThumbTableBranch(MCInst &Inst, unsigned Insn,
3421 uint64_t Address, const void *Decoder) {
3422 DecodeStatus S = MCDisassembler::Success;
3424 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3425 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3427 if (Rn == ARM::SP) S = MCDisassembler::SoftFail;
3428 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3429 return MCDisassembler::Fail;
3430 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3431 return MCDisassembler::Fail;
3436 DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Insn,
3437 uint64_t Address, const void *Decoder) {
3438 DecodeStatus S = MCDisassembler::Success;
3440 unsigned pred = fieldFromInstruction(Insn, 22, 4);
3441 if (pred == 0xE || pred == 0xF) {
3442 unsigned opc = fieldFromInstruction(Insn, 4, 28);
3445 return MCDisassembler::Fail;
3447 Inst.setOpcode(ARM::t2DSB);
3450 Inst.setOpcode(ARM::t2DMB);
3453 Inst.setOpcode(ARM::t2ISB);
3457 unsigned imm = fieldFromInstruction(Insn, 0, 4);
3458 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
3461 unsigned brtarget = fieldFromInstruction(Insn, 0, 11) << 1;
3462 brtarget |= fieldFromInstruction(Insn, 11, 1) << 19;
3463 brtarget |= fieldFromInstruction(Insn, 13, 1) << 18;
3464 brtarget |= fieldFromInstruction(Insn, 16, 6) << 12;
3465 brtarget |= fieldFromInstruction(Insn, 26, 1) << 20;
3467 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
3468 return MCDisassembler::Fail;
3469 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3470 return MCDisassembler::Fail;
3475 // Decode a shifted immediate operand. These basically consist
3476 // of an 8-bit value, and a 4-bit directive that specifies either
3477 // a splat operation or a rotation.
3478 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
3479 uint64_t Address, const void *Decoder) {
3480 unsigned ctrl = fieldFromInstruction(Val, 10, 2);
3482 unsigned byte = fieldFromInstruction(Val, 8, 2);
3483 unsigned imm = fieldFromInstruction(Val, 0, 8);
3486 Inst.addOperand(MCOperand::CreateImm(imm));
3489 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
3492 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
3495 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
3500 unsigned unrot = fieldFromInstruction(Val, 0, 7) | 0x80;
3501 unsigned rot = fieldFromInstruction(Val, 7, 5);
3502 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
3503 Inst.addOperand(MCOperand::CreateImm(imm));
3506 return MCDisassembler::Success;
3510 DecodeThumbBCCTargetOperand(MCInst &Inst, unsigned Val,
3511 uint64_t Address, const void *Decoder){
3512 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<9>(Val<<1) + 4,
3513 true, 2, Inst, Decoder))
3514 Inst.addOperand(MCOperand::CreateImm(SignExtend32<9>(Val << 1)));
3515 return MCDisassembler::Success;
3518 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
3519 uint64_t Address, const void *Decoder){
3520 // Val is passed in as S:J1:J2:imm10:imm11
3521 // Note no trailing zero after imm11. Also the J1 and J2 values are from
3522 // the encoded instruction. So here change to I1 and I2 values via:
3523 // I1 = NOT(J1 EOR S);
3524 // I2 = NOT(J2 EOR S);
3525 // and build the imm32 with one trailing zero as documented:
3526 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
3527 unsigned S = (Val >> 23) & 1;
3528 unsigned J1 = (Val >> 22) & 1;
3529 unsigned J2 = (Val >> 21) & 1;
3530 unsigned I1 = !(J1 ^ S);
3531 unsigned I2 = !(J2 ^ S);
3532 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
3533 int imm32 = SignExtend32<25>(tmp << 1);
3535 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
3536 true, 4, Inst, Decoder))
3537 Inst.addOperand(MCOperand::CreateImm(imm32));
3538 return MCDisassembler::Success;
3541 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Val,
3542 uint64_t Address, const void *Decoder) {
3544 return MCDisassembler::Fail;
3546 Inst.addOperand(MCOperand::CreateImm(Val));
3547 return MCDisassembler::Success;
3550 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Val,
3551 uint64_t Address, const void *Decoder) {
3552 if (!Val) return MCDisassembler::Fail;
3553 Inst.addOperand(MCOperand::CreateImm(Val));
3554 return MCDisassembler::Success;
3557 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
3558 uint64_t Address, const void *Decoder) {
3559 DecodeStatus S = MCDisassembler::Success;
3561 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3562 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3563 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3565 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3567 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3568 return MCDisassembler::Fail;
3569 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3570 return MCDisassembler::Fail;
3571 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3572 return MCDisassembler::Fail;
3573 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3574 return MCDisassembler::Fail;
3580 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
3581 uint64_t Address, const void *Decoder){
3582 DecodeStatus S = MCDisassembler::Success;
3584 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3585 unsigned Rt = fieldFromInstruction(Insn, 0, 4);
3586 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3587 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3589 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
3590 return MCDisassembler::Fail;
3592 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3593 if (Rd == Rn || Rd == Rt || Rd == Rt+1) return MCDisassembler::Fail;
3595 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3596 return MCDisassembler::Fail;
3597 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3598 return MCDisassembler::Fail;
3599 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3600 return MCDisassembler::Fail;
3601 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3602 return MCDisassembler::Fail;
3607 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
3608 uint64_t Address, const void *Decoder) {
3609 DecodeStatus S = MCDisassembler::Success;
3611 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3612 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3613 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3614 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3615 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3616 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3618 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3620 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3621 return MCDisassembler::Fail;
3622 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3623 return MCDisassembler::Fail;
3624 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3625 return MCDisassembler::Fail;
3626 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3627 return MCDisassembler::Fail;
3632 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
3633 uint64_t Address, const void *Decoder) {
3634 DecodeStatus S = MCDisassembler::Success;
3636 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3637 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3638 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3639 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3640 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3641 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3642 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3644 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3645 if (Rm == 0xF) S = MCDisassembler::SoftFail;
3647 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3648 return MCDisassembler::Fail;
3649 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3650 return MCDisassembler::Fail;
3651 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3652 return MCDisassembler::Fail;
3653 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3654 return MCDisassembler::Fail;
3660 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
3661 uint64_t Address, const void *Decoder) {
3662 DecodeStatus S = MCDisassembler::Success;
3664 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3665 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3666 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3667 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3668 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3669 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3671 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3673 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3674 return MCDisassembler::Fail;
3675 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3676 return MCDisassembler::Fail;
3677 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3678 return MCDisassembler::Fail;
3679 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3680 return MCDisassembler::Fail;
3685 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
3686 uint64_t Address, const void *Decoder) {
3687 DecodeStatus S = MCDisassembler::Success;
3689 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3690 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3691 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3692 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3693 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3694 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3696 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3698 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3699 return MCDisassembler::Fail;
3700 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3701 return MCDisassembler::Fail;
3702 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3703 return MCDisassembler::Fail;
3704 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3705 return MCDisassembler::Fail;
3710 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
3711 uint64_t Address, const void *Decoder) {
3712 DecodeStatus S = MCDisassembler::Success;
3714 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3715 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3716 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3717 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3718 unsigned size = fieldFromInstruction(Insn, 10, 2);
3724 return MCDisassembler::Fail;
3726 if (fieldFromInstruction(Insn, 4, 1))
3727 return MCDisassembler::Fail; // UNDEFINED
3728 index = fieldFromInstruction(Insn, 5, 3);
3731 if (fieldFromInstruction(Insn, 5, 1))
3732 return MCDisassembler::Fail; // UNDEFINED
3733 index = fieldFromInstruction(Insn, 6, 2);
3734 if (fieldFromInstruction(Insn, 4, 1))
3738 if (fieldFromInstruction(Insn, 6, 1))
3739 return MCDisassembler::Fail; // UNDEFINED
3740 index = fieldFromInstruction(Insn, 7, 1);
3742 switch (fieldFromInstruction(Insn, 4, 2)) {
3748 return MCDisassembler::Fail;
3753 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3754 return MCDisassembler::Fail;
3755 if (Rm != 0xF) { // Writeback
3756 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3757 return MCDisassembler::Fail;
3759 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3760 return MCDisassembler::Fail;
3761 Inst.addOperand(MCOperand::CreateImm(align));
3764 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3765 return MCDisassembler::Fail;
3767 Inst.addOperand(MCOperand::CreateReg(0));
3770 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3771 return MCDisassembler::Fail;
3772 Inst.addOperand(MCOperand::CreateImm(index));
3777 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
3778 uint64_t Address, const void *Decoder) {
3779 DecodeStatus S = MCDisassembler::Success;
3781 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3782 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3783 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3784 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3785 unsigned size = fieldFromInstruction(Insn, 10, 2);
3791 return MCDisassembler::Fail;
3793 if (fieldFromInstruction(Insn, 4, 1))
3794 return MCDisassembler::Fail; // UNDEFINED
3795 index = fieldFromInstruction(Insn, 5, 3);
3798 if (fieldFromInstruction(Insn, 5, 1))
3799 return MCDisassembler::Fail; // UNDEFINED
3800 index = fieldFromInstruction(Insn, 6, 2);
3801 if (fieldFromInstruction(Insn, 4, 1))
3805 if (fieldFromInstruction(Insn, 6, 1))
3806 return MCDisassembler::Fail; // UNDEFINED
3807 index = fieldFromInstruction(Insn, 7, 1);
3809 switch (fieldFromInstruction(Insn, 4, 2)) {
3815 return MCDisassembler::Fail;
3820 if (Rm != 0xF) { // Writeback
3821 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3822 return MCDisassembler::Fail;
3824 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3825 return MCDisassembler::Fail;
3826 Inst.addOperand(MCOperand::CreateImm(align));
3829 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3830 return MCDisassembler::Fail;
3832 Inst.addOperand(MCOperand::CreateReg(0));
3835 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3836 return MCDisassembler::Fail;
3837 Inst.addOperand(MCOperand::CreateImm(index));
3843 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
3844 uint64_t Address, const void *Decoder) {
3845 DecodeStatus S = MCDisassembler::Success;
3847 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3848 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3849 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3850 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3851 unsigned size = fieldFromInstruction(Insn, 10, 2);
3858 return MCDisassembler::Fail;
3860 index = fieldFromInstruction(Insn, 5, 3);
3861 if (fieldFromInstruction(Insn, 4, 1))
3865 index = fieldFromInstruction(Insn, 6, 2);
3866 if (fieldFromInstruction(Insn, 4, 1))
3868 if (fieldFromInstruction(Insn, 5, 1))
3872 if (fieldFromInstruction(Insn, 5, 1))
3873 return MCDisassembler::Fail; // UNDEFINED
3874 index = fieldFromInstruction(Insn, 7, 1);
3875 if (fieldFromInstruction(Insn, 4, 1) != 0)
3877 if (fieldFromInstruction(Insn, 6, 1))
3882 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3883 return MCDisassembler::Fail;
3884 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3885 return MCDisassembler::Fail;
3886 if (Rm != 0xF) { // Writeback
3887 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3888 return MCDisassembler::Fail;
3890 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3891 return MCDisassembler::Fail;
3892 Inst.addOperand(MCOperand::CreateImm(align));
3895 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3896 return MCDisassembler::Fail;
3898 Inst.addOperand(MCOperand::CreateReg(0));
3901 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3902 return MCDisassembler::Fail;
3903 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3904 return MCDisassembler::Fail;
3905 Inst.addOperand(MCOperand::CreateImm(index));
3910 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
3911 uint64_t Address, const void *Decoder) {
3912 DecodeStatus S = MCDisassembler::Success;
3914 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3915 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3916 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3917 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3918 unsigned size = fieldFromInstruction(Insn, 10, 2);
3925 return MCDisassembler::Fail;
3927 index = fieldFromInstruction(Insn, 5, 3);
3928 if (fieldFromInstruction(Insn, 4, 1))
3932 index = fieldFromInstruction(Insn, 6, 2);
3933 if (fieldFromInstruction(Insn, 4, 1))
3935 if (fieldFromInstruction(Insn, 5, 1))
3939 if (fieldFromInstruction(Insn, 5, 1))
3940 return MCDisassembler::Fail; // UNDEFINED
3941 index = fieldFromInstruction(Insn, 7, 1);
3942 if (fieldFromInstruction(Insn, 4, 1) != 0)
3944 if (fieldFromInstruction(Insn, 6, 1))
3949 if (Rm != 0xF) { // Writeback
3950 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3951 return MCDisassembler::Fail;
3953 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3954 return MCDisassembler::Fail;
3955 Inst.addOperand(MCOperand::CreateImm(align));
3958 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3959 return MCDisassembler::Fail;
3961 Inst.addOperand(MCOperand::CreateReg(0));
3964 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3965 return MCDisassembler::Fail;
3966 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3967 return MCDisassembler::Fail;
3968 Inst.addOperand(MCOperand::CreateImm(index));
3974 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
3975 uint64_t Address, const void *Decoder) {
3976 DecodeStatus S = MCDisassembler::Success;
3978 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3979 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3980 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3981 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3982 unsigned size = fieldFromInstruction(Insn, 10, 2);
3989 return MCDisassembler::Fail;
3991 if (fieldFromInstruction(Insn, 4, 1))
3992 return MCDisassembler::Fail; // UNDEFINED
3993 index = fieldFromInstruction(Insn, 5, 3);
3996 if (fieldFromInstruction(Insn, 4, 1))
3997 return MCDisassembler::Fail; // UNDEFINED
3998 index = fieldFromInstruction(Insn, 6, 2);
3999 if (fieldFromInstruction(Insn, 5, 1))
4003 if (fieldFromInstruction(Insn, 4, 2))
4004 return MCDisassembler::Fail; // UNDEFINED
4005 index = fieldFromInstruction(Insn, 7, 1);
4006 if (fieldFromInstruction(Insn, 6, 1))
4011 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4012 return MCDisassembler::Fail;
4013 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4014 return MCDisassembler::Fail;
4015 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4016 return MCDisassembler::Fail;
4018 if (Rm != 0xF) { // Writeback
4019 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4020 return MCDisassembler::Fail;
4022 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4023 return MCDisassembler::Fail;
4024 Inst.addOperand(MCOperand::CreateImm(align));
4027 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4028 return MCDisassembler::Fail;
4030 Inst.addOperand(MCOperand::CreateReg(0));
4033 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4034 return MCDisassembler::Fail;
4035 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4036 return MCDisassembler::Fail;
4037 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4038 return MCDisassembler::Fail;
4039 Inst.addOperand(MCOperand::CreateImm(index));
4044 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
4045 uint64_t Address, const void *Decoder) {
4046 DecodeStatus S = MCDisassembler::Success;
4048 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4049 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4050 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4051 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4052 unsigned size = fieldFromInstruction(Insn, 10, 2);
4059 return MCDisassembler::Fail;
4061 if (fieldFromInstruction(Insn, 4, 1))
4062 return MCDisassembler::Fail; // UNDEFINED
4063 index = fieldFromInstruction(Insn, 5, 3);
4066 if (fieldFromInstruction(Insn, 4, 1))
4067 return MCDisassembler::Fail; // UNDEFINED
4068 index = fieldFromInstruction(Insn, 6, 2);
4069 if (fieldFromInstruction(Insn, 5, 1))
4073 if (fieldFromInstruction(Insn, 4, 2))
4074 return MCDisassembler::Fail; // UNDEFINED
4075 index = fieldFromInstruction(Insn, 7, 1);
4076 if (fieldFromInstruction(Insn, 6, 1))
4081 if (Rm != 0xF) { // Writeback
4082 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4083 return MCDisassembler::Fail;
4085 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4086 return MCDisassembler::Fail;
4087 Inst.addOperand(MCOperand::CreateImm(align));
4090 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4091 return MCDisassembler::Fail;
4093 Inst.addOperand(MCOperand::CreateReg(0));
4096 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4097 return MCDisassembler::Fail;
4098 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4099 return MCDisassembler::Fail;
4100 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4101 return MCDisassembler::Fail;
4102 Inst.addOperand(MCOperand::CreateImm(index));
4108 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
4109 uint64_t Address, const void *Decoder) {
4110 DecodeStatus S = MCDisassembler::Success;
4112 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4113 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4114 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4115 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4116 unsigned size = fieldFromInstruction(Insn, 10, 2);
4123 return MCDisassembler::Fail;
4125 if (fieldFromInstruction(Insn, 4, 1))
4127 index = fieldFromInstruction(Insn, 5, 3);
4130 if (fieldFromInstruction(Insn, 4, 1))
4132 index = fieldFromInstruction(Insn, 6, 2);
4133 if (fieldFromInstruction(Insn, 5, 1))
4137 switch (fieldFromInstruction(Insn, 4, 2)) {
4141 return MCDisassembler::Fail;
4143 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4146 index = fieldFromInstruction(Insn, 7, 1);
4147 if (fieldFromInstruction(Insn, 6, 1))
4152 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4153 return MCDisassembler::Fail;
4154 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4155 return MCDisassembler::Fail;
4156 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4157 return MCDisassembler::Fail;
4158 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4159 return MCDisassembler::Fail;
4161 if (Rm != 0xF) { // Writeback
4162 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4163 return MCDisassembler::Fail;
4165 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4166 return MCDisassembler::Fail;
4167 Inst.addOperand(MCOperand::CreateImm(align));
4170 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4171 return MCDisassembler::Fail;
4173 Inst.addOperand(MCOperand::CreateReg(0));
4176 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4177 return MCDisassembler::Fail;
4178 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4179 return MCDisassembler::Fail;
4180 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4181 return MCDisassembler::Fail;
4182 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4183 return MCDisassembler::Fail;
4184 Inst.addOperand(MCOperand::CreateImm(index));
4189 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
4190 uint64_t Address, const void *Decoder) {
4191 DecodeStatus S = MCDisassembler::Success;
4193 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4194 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4195 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4196 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4197 unsigned size = fieldFromInstruction(Insn, 10, 2);
4204 return MCDisassembler::Fail;
4206 if (fieldFromInstruction(Insn, 4, 1))
4208 index = fieldFromInstruction(Insn, 5, 3);
4211 if (fieldFromInstruction(Insn, 4, 1))
4213 index = fieldFromInstruction(Insn, 6, 2);
4214 if (fieldFromInstruction(Insn, 5, 1))
4218 switch (fieldFromInstruction(Insn, 4, 2)) {
4222 return MCDisassembler::Fail;
4224 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4227 index = fieldFromInstruction(Insn, 7, 1);
4228 if (fieldFromInstruction(Insn, 6, 1))
4233 if (Rm != 0xF) { // Writeback
4234 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4235 return MCDisassembler::Fail;
4237 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4238 return MCDisassembler::Fail;
4239 Inst.addOperand(MCOperand::CreateImm(align));
4242 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4243 return MCDisassembler::Fail;
4245 Inst.addOperand(MCOperand::CreateReg(0));
4248 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4249 return MCDisassembler::Fail;
4250 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4251 return MCDisassembler::Fail;
4252 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4253 return MCDisassembler::Fail;
4254 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4255 return MCDisassembler::Fail;
4256 Inst.addOperand(MCOperand::CreateImm(index));
4261 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
4262 uint64_t Address, const void *Decoder) {
4263 DecodeStatus S = MCDisassembler::Success;
4264 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4265 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4266 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4267 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4268 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4270 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4271 S = MCDisassembler::SoftFail;
4273 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4274 return MCDisassembler::Fail;
4275 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4276 return MCDisassembler::Fail;
4277 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4278 return MCDisassembler::Fail;
4279 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4280 return MCDisassembler::Fail;
4281 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4282 return MCDisassembler::Fail;
4287 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
4288 uint64_t Address, const void *Decoder) {
4289 DecodeStatus S = MCDisassembler::Success;
4290 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4291 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4292 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4293 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4294 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4296 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4297 S = MCDisassembler::SoftFail;
4299 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4300 return MCDisassembler::Fail;
4301 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4302 return MCDisassembler::Fail;
4303 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4304 return MCDisassembler::Fail;
4305 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4306 return MCDisassembler::Fail;
4307 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4308 return MCDisassembler::Fail;
4313 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Insn,
4314 uint64_t Address, const void *Decoder) {
4315 DecodeStatus S = MCDisassembler::Success;
4316 unsigned pred = fieldFromInstruction(Insn, 4, 4);
4317 unsigned mask = fieldFromInstruction(Insn, 0, 4);
4321 S = MCDisassembler::SoftFail;
4326 S = MCDisassembler::SoftFail;
4329 Inst.addOperand(MCOperand::CreateImm(pred));
4330 Inst.addOperand(MCOperand::CreateImm(mask));
4335 DecodeT2LDRDPreInstruction(MCInst &Inst, unsigned Insn,
4336 uint64_t Address, const void *Decoder) {
4337 DecodeStatus S = MCDisassembler::Success;
4339 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4340 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
4341 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4342 unsigned addr = fieldFromInstruction(Insn, 0, 8);
4343 unsigned W = fieldFromInstruction(Insn, 21, 1);
4344 unsigned U = fieldFromInstruction(Insn, 23, 1);
4345 unsigned P = fieldFromInstruction(Insn, 24, 1);
4346 bool writeback = (W == 1) | (P == 0);
4348 addr |= (U << 8) | (Rn << 9);
4350 if (writeback && (Rn == Rt || Rn == Rt2))
4351 Check(S, MCDisassembler::SoftFail);
4353 Check(S, MCDisassembler::SoftFail);
4356 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4357 return MCDisassembler::Fail;
4359 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4360 return MCDisassembler::Fail;
4361 // Writeback operand
4362 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4363 return MCDisassembler::Fail;
4365 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4366 return MCDisassembler::Fail;
4372 DecodeT2STRDPreInstruction(MCInst &Inst, unsigned Insn,
4373 uint64_t Address, const void *Decoder) {
4374 DecodeStatus S = MCDisassembler::Success;
4376 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4377 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
4378 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4379 unsigned addr = fieldFromInstruction(Insn, 0, 8);
4380 unsigned W = fieldFromInstruction(Insn, 21, 1);
4381 unsigned U = fieldFromInstruction(Insn, 23, 1);
4382 unsigned P = fieldFromInstruction(Insn, 24, 1);
4383 bool writeback = (W == 1) | (P == 0);
4385 addr |= (U << 8) | (Rn << 9);
4387 if (writeback && (Rn == Rt || Rn == Rt2))
4388 Check(S, MCDisassembler::SoftFail);
4390 // Writeback operand
4391 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4392 return MCDisassembler::Fail;
4394 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4395 return MCDisassembler::Fail;
4397 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4398 return MCDisassembler::Fail;
4400 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4401 return MCDisassembler::Fail;
4406 static DecodeStatus DecodeT2Adr(MCInst &Inst, uint32_t Insn,
4407 uint64_t Address, const void *Decoder) {
4408 unsigned sign1 = fieldFromInstruction(Insn, 21, 1);
4409 unsigned sign2 = fieldFromInstruction(Insn, 23, 1);
4410 if (sign1 != sign2) return MCDisassembler::Fail;
4412 unsigned Val = fieldFromInstruction(Insn, 0, 8);
4413 Val |= fieldFromInstruction(Insn, 12, 3) << 8;
4414 Val |= fieldFromInstruction(Insn, 26, 1) << 11;
4416 Inst.addOperand(MCOperand::CreateImm(SignExtend32<13>(Val)));
4418 return MCDisassembler::Success;
4421 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, uint32_t Val,
4423 const void *Decoder) {
4424 DecodeStatus S = MCDisassembler::Success;
4426 // Shift of "asr #32" is not allowed in Thumb2 mode.
4427 if (Val == 0x20) S = MCDisassembler::SoftFail;
4428 Inst.addOperand(MCOperand::CreateImm(Val));
4432 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
4433 uint64_t Address, const void *Decoder) {
4434 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4435 unsigned Rt2 = fieldFromInstruction(Insn, 0, 4);
4436 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4437 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4440 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
4442 DecodeStatus S = MCDisassembler::Success;
4444 if (Rt == Rn || Rn == Rt2)
4445 S = MCDisassembler::SoftFail;
4447 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4448 return MCDisassembler::Fail;
4449 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
4450 return MCDisassembler::Fail;
4451 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4452 return MCDisassembler::Fail;
4453 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4454 return MCDisassembler::Fail;
4459 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
4460 uint64_t Address, const void *Decoder) {
4461 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
4462 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
4463 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
4464 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
4465 unsigned imm = fieldFromInstruction(Insn, 16, 6);
4466 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
4468 DecodeStatus S = MCDisassembler::Success;
4470 // VMOVv2f32 is ambiguous with these decodings.
4471 if (!(imm & 0x38) && cmode == 0xF) {
4472 Inst.setOpcode(ARM::VMOVv2f32);
4473 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4476 if (!(imm & 0x20)) return MCDisassembler::Fail;
4478 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
4479 return MCDisassembler::Fail;
4480 if (!Check(S, DecodeDPRRegisterClass(Inst, Vm, Address, Decoder)))
4481 return MCDisassembler::Fail;
4482 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4487 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
4488 uint64_t Address, const void *Decoder) {
4489 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
4490 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
4491 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
4492 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
4493 unsigned imm = fieldFromInstruction(Insn, 16, 6);
4494 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
4496 DecodeStatus S = MCDisassembler::Success;
4498 // VMOVv4f32 is ambiguous with these decodings.
4499 if (!(imm & 0x38) && cmode == 0xF) {
4500 Inst.setOpcode(ARM::VMOVv4f32);
4501 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4504 if (!(imm & 0x20)) return MCDisassembler::Fail;
4506 if (!Check(S, DecodeQPRRegisterClass(Inst, Vd, Address, Decoder)))
4507 return MCDisassembler::Fail;
4508 if (!Check(S, DecodeQPRRegisterClass(Inst, Vm, Address, Decoder)))
4509 return MCDisassembler::Fail;
4510 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4515 static DecodeStatus DecodeImm0_4(MCInst &Inst, unsigned Insn, uint64_t Address,
4516 const void *Decoder)
4518 unsigned Imm = fieldFromInstruction(Insn, 0, 3);
4519 if (Imm > 4) return MCDisassembler::Fail;
4520 Inst.addOperand(MCOperand::CreateImm(Imm));
4521 return MCDisassembler::Success;
4524 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
4525 uint64_t Address, const void *Decoder) {
4526 DecodeStatus S = MCDisassembler::Success;
4528 unsigned Rn = fieldFromInstruction(Val, 16, 4);
4529 unsigned Rt = fieldFromInstruction(Val, 12, 4);
4530 unsigned Rm = fieldFromInstruction(Val, 0, 4);
4531 Rm |= (fieldFromInstruction(Val, 23, 1) << 4);
4532 unsigned Cond = fieldFromInstruction(Val, 28, 4);
4534 if (fieldFromInstruction(Val, 8, 4) != 0 || Rn == Rt)
4535 S = MCDisassembler::SoftFail;
4537 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4538 return MCDisassembler::Fail;
4539 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4540 return MCDisassembler::Fail;
4541 if (!Check(S, DecodeAddrMode7Operand(Inst, Rn, Address, Decoder)))
4542 return MCDisassembler::Fail;
4543 if (!Check(S, DecodePostIdxReg(Inst, Rm, Address, Decoder)))
4544 return MCDisassembler::Fail;
4545 if (!Check(S, DecodePredicateOperand(Inst, Cond, Address, Decoder)))
4546 return MCDisassembler::Fail;
4551 static DecodeStatus DecodeMRRC2(llvm::MCInst &Inst, unsigned Val,
4552 uint64_t Address, const void *Decoder) {
4554 DecodeStatus S = MCDisassembler::Success;
4556 unsigned CRm = fieldFromInstruction(Val, 0, 4);
4557 unsigned opc1 = fieldFromInstruction(Val, 4, 4);
4558 unsigned cop = fieldFromInstruction(Val, 8, 4);
4559 unsigned Rt = fieldFromInstruction(Val, 12, 4);
4560 unsigned Rt2 = fieldFromInstruction(Val, 16, 4);
4562 if ((cop & ~0x1) == 0xa)
4563 return MCDisassembler::Fail;
4566 S = MCDisassembler::SoftFail;
4568 Inst.addOperand(MCOperand::CreateImm(cop));
4569 Inst.addOperand(MCOperand::CreateImm(opc1));
4570 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4571 return MCDisassembler::Fail;
4572 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
4573 return MCDisassembler::Fail;
4574 Inst.addOperand(MCOperand::CreateImm(CRm));