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 DecodeInstSyncBarrierOption(MCInst &Inst, unsigned Insn,
283 uint64_t Address, const void *Decoder);
284 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Insn,
285 uint64_t Address, const void *Decoder);
286 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
287 uint64_t Address, const void *Decoder);
288 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
289 uint64_t Address, const void *Decoder);
290 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
291 uint64_t Address, const void *Decoder);
292 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
293 uint64_t Address, const void *Decoder);
294 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
295 uint64_t Address, const void *Decoder);
296 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
297 uint64_t Address, const void *Decoder);
298 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
299 uint64_t Address, const void *Decoder);
300 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
301 uint64_t Address, const void *Decoder);
302 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
303 uint64_t Address, const void *Decoder);
304 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
305 uint64_t Address, const void *Decoder);
306 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
307 uint64_t Address, const void *Decoder);
308 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
309 uint64_t Address, const void *Decoder);
310 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
311 uint64_t Address, const void *Decoder);
312 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
313 uint64_t Address, const void *Decoder);
314 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
315 uint64_t Address, const void *Decoder);
316 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
317 uint64_t Address, const void *Decoder);
318 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
319 uint64_t Address, const void *Decoder);
320 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
321 uint64_t Address, const void *Decoder);
322 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
323 uint64_t Address, const void *Decoder);
324 static DecodeStatus DecodeImm0_4(MCInst &Inst, unsigned Insn, uint64_t Address,
325 const void *Decoder);
328 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
329 uint64_t Address, const void *Decoder);
330 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
331 uint64_t Address, const void *Decoder);
332 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
333 uint64_t Address, const void *Decoder);
334 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
335 uint64_t Address, const void *Decoder);
336 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
337 uint64_t Address, const void *Decoder);
338 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
339 uint64_t Address, const void *Decoder);
340 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
341 uint64_t Address, const void *Decoder);
342 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
343 uint64_t Address, const void *Decoder);
344 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
345 uint64_t Address, const void *Decoder);
346 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Val,
347 uint64_t Address, const void *Decoder);
348 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
349 uint64_t Address, const void *Decoder);
350 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
351 uint64_t Address, const void *Decoder);
352 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
353 uint64_t Address, const void *Decoder);
354 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
355 uint64_t Address, const void *Decoder);
356 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
357 uint64_t Address, const void *Decoder);
358 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Val,
359 uint64_t Address, const void *Decoder);
360 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
361 uint64_t Address, const void *Decoder);
362 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
363 uint64_t Address, const void *Decoder);
364 static DecodeStatus DecodeQADDInstruction(MCInst &Inst, unsigned Insn,
365 uint64_t Address, const void *Decoder);
366 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Insn,
367 uint64_t Address, const void *Decoder);
368 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
369 uint64_t Address, const void *Decoder);
370 static DecodeStatus DecodeThumbTableBranch(MCInst &Inst, unsigned Val,
371 uint64_t Address, const void *Decoder);
372 static DecodeStatus DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Val,
373 uint64_t Address, const void *Decoder);
374 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
375 uint64_t Address, const void *Decoder);
376 static DecodeStatus DecodeThumbBCCTargetOperand(MCInst &Inst,unsigned Val,
377 uint64_t Address, const void *Decoder);
378 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
379 uint64_t Address, const void *Decoder);
380 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Val,
381 uint64_t Address, const void *Decoder);
382 static DecodeStatus DecodeT2LDRDPreInstruction(MCInst &Inst,unsigned Insn,
383 uint64_t Address, const void *Decoder);
384 static DecodeStatus DecodeT2STRDPreInstruction(MCInst &Inst,unsigned Insn,
385 uint64_t Address, const void *Decoder);
386 static DecodeStatus DecodeT2Adr(MCInst &Inst, unsigned Val,
387 uint64_t Address, const void *Decoder);
388 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Val,
389 uint64_t Address, const void *Decoder);
390 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, unsigned Val,
391 uint64_t Address, const void *Decoder);
393 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
394 uint64_t Address, const void *Decoder);
395 static DecodeStatus DecodeMRRC2(llvm::MCInst &Inst, unsigned Val,
396 uint64_t Address, const void *Decoder);
397 #include "ARMGenDisassemblerTables.inc"
399 static MCDisassembler *createARMDisassembler(const Target &T, const MCSubtargetInfo &STI) {
400 return new ARMDisassembler(STI);
403 static MCDisassembler *createThumbDisassembler(const Target &T, const MCSubtargetInfo &STI) {
404 return new ThumbDisassembler(STI);
407 DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
408 const MemoryObject &Region,
411 raw_ostream &cs) const {
416 assert(!(STI.getFeatureBits() & ARM::ModeThumb) &&
417 "Asked to disassemble an ARM instruction but Subtarget is in Thumb mode!");
419 // We want to read exactly 4 bytes of data.
420 if (Region.readBytes(Address, 4, bytes) == -1) {
422 return MCDisassembler::Fail;
425 // Encoded as a small-endian 32-bit word in the stream.
426 uint32_t insn = (bytes[3] << 24) |
431 // Calling the auto-generated decoder function.
432 DecodeStatus result = decodeInstruction(DecoderTableARM32, MI, insn,
434 if (result != MCDisassembler::Fail) {
439 // VFP and NEON instructions, similarly, are shared between ARM
442 result = decodeInstruction(DecoderTableVFP32, MI, insn, Address, this, STI);
443 if (result != MCDisassembler::Fail) {
449 result = decodeInstruction(DecoderTableNEONData32, MI, insn, Address,
451 if (result != MCDisassembler::Fail) {
453 // Add a fake predicate operand, because we share these instruction
454 // definitions with Thumb2 where these instructions are predicable.
455 if (!DecodePredicateOperand(MI, 0xE, Address, this))
456 return MCDisassembler::Fail;
461 result = decodeInstruction(DecoderTableNEONLoadStore32, MI, insn, Address,
463 if (result != MCDisassembler::Fail) {
465 // Add a fake predicate operand, because we share these instruction
466 // definitions with Thumb2 where these instructions are predicable.
467 if (!DecodePredicateOperand(MI, 0xE, Address, this))
468 return MCDisassembler::Fail;
473 result = decodeInstruction(DecoderTableNEONDup32, MI, insn, Address,
475 if (result != MCDisassembler::Fail) {
477 // Add a fake predicate operand, because we share these instruction
478 // definitions with Thumb2 where these instructions are predicable.
479 if (!DecodePredicateOperand(MI, 0xE, Address, this))
480 return MCDisassembler::Fail;
487 return MCDisassembler::Fail;
491 extern const MCInstrDesc ARMInsts[];
494 /// tryAddingSymbolicOperand - trys to add a symbolic operand in place of the
495 /// immediate Value in the MCInst. The immediate Value has had any PC
496 /// adjustment made by the caller. If the instruction is a branch instruction
497 /// then isBranch is true, else false. If the getOpInfo() function was set as
498 /// part of the setupForSymbolicDisassembly() call then that function is called
499 /// to get any symbolic information at the Address for this instruction. If
500 /// that returns non-zero then the symbolic information it returns is used to
501 /// create an MCExpr and that is added as an operand to the MCInst. If
502 /// getOpInfo() returns zero and isBranch is true then a symbol look up for
503 /// Value is done and if a symbol is found an MCExpr is created with that, else
504 /// an MCExpr with Value is created. This function returns true if it adds an
505 /// operand to the MCInst and false otherwise.
506 static bool tryAddingSymbolicOperand(uint64_t Address, int32_t Value,
507 bool isBranch, uint64_t InstSize,
508 MCInst &MI, const void *Decoder) {
509 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
510 // FIXME: Does it make sense for value to be negative?
511 return Dis->tryAddingSymbolicOperand(MI, (uint32_t)Value, Address, isBranch,
512 /* Offset */ 0, InstSize);
515 /// tryAddingPcLoadReferenceComment - trys to add a comment as to what is being
516 /// referenced by a load instruction with the base register that is the Pc.
517 /// These can often be values in a literal pool near the Address of the
518 /// instruction. The Address of the instruction and its immediate Value are
519 /// used as a possible literal pool entry. The SymbolLookUp call back will
520 /// return the name of a symbol referenced by the literal pool's entry if
521 /// the referenced address is that of a symbol. Or it will return a pointer to
522 /// a literal 'C' string if the referenced address of the literal pool's entry
523 /// is an address into a section with 'C' string literals.
524 static void tryAddingPcLoadReferenceComment(uint64_t Address, int Value,
525 const void *Decoder) {
526 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
527 Dis->tryAddingPcLoadReferenceComment(Value, Address);
530 // Thumb1 instructions don't have explicit S bits. Rather, they
531 // implicitly set CPSR. Since it's not represented in the encoding, the
532 // auto-generated decoder won't inject the CPSR operand. We need to fix
533 // that as a post-pass.
534 static void AddThumb1SBit(MCInst &MI, bool InITBlock) {
535 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
536 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
537 MCInst::iterator I = MI.begin();
538 for (unsigned i = 0; i < NumOps; ++i, ++I) {
539 if (I == MI.end()) break;
540 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) {
541 if (i > 0 && OpInfo[i-1].isPredicate()) continue;
542 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
547 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
550 // Most Thumb instructions don't have explicit predicates in the
551 // encoding, but rather get their predicates from IT context. We need
552 // to fix up the predicate operands using this context information as a
554 MCDisassembler::DecodeStatus
555 ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
556 MCDisassembler::DecodeStatus S = Success;
558 // A few instructions actually have predicates encoded in them. Don't
559 // try to overwrite it if we're seeing one of those.
560 switch (MI.getOpcode()) {
571 // Some instructions (mostly conditional branches) are not
572 // allowed in IT blocks.
573 if (ITBlock.instrInITBlock())
582 // Some instructions (mostly unconditional branches) can
583 // only appears at the end of, or outside of, an IT.
584 if (ITBlock.instrInITBlock() && !ITBlock.instrLastInITBlock())
591 // If we're in an IT block, base the predicate on that. Otherwise,
592 // assume a predicate of AL.
594 CC = ITBlock.getITCC();
597 if (ITBlock.instrInITBlock())
598 ITBlock.advanceITState();
600 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
601 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
602 MCInst::iterator I = MI.begin();
603 for (unsigned i = 0; i < NumOps; ++i, ++I) {
604 if (I == MI.end()) break;
605 if (OpInfo[i].isPredicate()) {
606 I = MI.insert(I, MCOperand::CreateImm(CC));
609 MI.insert(I, MCOperand::CreateReg(0));
611 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
616 I = MI.insert(I, MCOperand::CreateImm(CC));
619 MI.insert(I, MCOperand::CreateReg(0));
621 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
626 // Thumb VFP instructions are a special case. Because we share their
627 // encodings between ARM and Thumb modes, and they are predicable in ARM
628 // mode, the auto-generated decoder will give them an (incorrect)
629 // predicate operand. We need to rewrite these operands based on the IT
630 // context as a post-pass.
631 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
633 CC = ITBlock.getITCC();
634 if (ITBlock.instrInITBlock())
635 ITBlock.advanceITState();
637 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
638 MCInst::iterator I = MI.begin();
639 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
640 for (unsigned i = 0; i < NumOps; ++i, ++I) {
641 if (OpInfo[i].isPredicate() ) {
647 I->setReg(ARM::CPSR);
653 DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
654 const MemoryObject &Region,
657 raw_ostream &cs) const {
662 assert((STI.getFeatureBits() & ARM::ModeThumb) &&
663 "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!");
665 // We want to read exactly 2 bytes of data.
666 if (Region.readBytes(Address, 2, bytes) == -1) {
668 return MCDisassembler::Fail;
671 uint16_t insn16 = (bytes[1] << 8) | bytes[0];
672 DecodeStatus result = decodeInstruction(DecoderTableThumb16, MI, insn16,
674 if (result != MCDisassembler::Fail) {
676 Check(result, AddThumbPredicate(MI));
681 result = decodeInstruction(DecoderTableThumbSBit16, MI, insn16,
685 bool InITBlock = ITBlock.instrInITBlock();
686 Check(result, AddThumbPredicate(MI));
687 AddThumb1SBit(MI, InITBlock);
692 result = decodeInstruction(DecoderTableThumb216, MI, insn16,
694 if (result != MCDisassembler::Fail) {
697 // Nested IT blocks are UNPREDICTABLE. Must be checked before we add
698 // the Thumb predicate.
699 if (MI.getOpcode() == ARM::t2IT && ITBlock.instrInITBlock())
700 result = MCDisassembler::SoftFail;
702 Check(result, AddThumbPredicate(MI));
704 // If we find an IT instruction, we need to parse its condition
705 // code and mask operands so that we can apply them correctly
706 // to the subsequent instructions.
707 if (MI.getOpcode() == ARM::t2IT) {
709 unsigned Firstcond = MI.getOperand(0).getImm();
710 unsigned Mask = MI.getOperand(1).getImm();
711 ITBlock.setITState(Firstcond, Mask);
717 // We want to read exactly 4 bytes of data.
718 if (Region.readBytes(Address, 4, bytes) == -1) {
720 return MCDisassembler::Fail;
723 uint32_t insn32 = (bytes[3] << 8) |
728 result = decodeInstruction(DecoderTableThumb32, MI, insn32, Address,
730 if (result != MCDisassembler::Fail) {
732 bool InITBlock = ITBlock.instrInITBlock();
733 Check(result, AddThumbPredicate(MI));
734 AddThumb1SBit(MI, InITBlock);
739 result = decodeInstruction(DecoderTableThumb232, MI, insn32, Address,
741 if (result != MCDisassembler::Fail) {
743 Check(result, AddThumbPredicate(MI));
748 result = decodeInstruction(DecoderTableVFP32, MI, insn32, Address, this, STI);
749 if (result != MCDisassembler::Fail) {
751 UpdateThumbVFPPredicate(MI);
756 result = decodeInstruction(DecoderTableNEONDup32, MI, insn32, Address,
758 if (result != MCDisassembler::Fail) {
760 Check(result, AddThumbPredicate(MI));
764 if (fieldFromInstruction(insn32, 24, 8) == 0xF9) {
766 uint32_t NEONLdStInsn = insn32;
767 NEONLdStInsn &= 0xF0FFFFFF;
768 NEONLdStInsn |= 0x04000000;
769 result = decodeInstruction(DecoderTableNEONLoadStore32, MI, NEONLdStInsn,
771 if (result != MCDisassembler::Fail) {
773 Check(result, AddThumbPredicate(MI));
778 if (fieldFromInstruction(insn32, 24, 4) == 0xF) {
780 uint32_t NEONDataInsn = insn32;
781 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
782 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
783 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
784 result = decodeInstruction(DecoderTableNEONData32, MI, NEONDataInsn,
786 if (result != MCDisassembler::Fail) {
788 Check(result, AddThumbPredicate(MI));
794 return MCDisassembler::Fail;
798 extern "C" void LLVMInitializeARMDisassembler() {
799 TargetRegistry::RegisterMCDisassembler(TheARMTarget,
800 createARMDisassembler);
801 TargetRegistry::RegisterMCDisassembler(TheThumbTarget,
802 createThumbDisassembler);
805 static const uint16_t GPRDecoderTable[] = {
806 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
807 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
808 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
809 ARM::R12, ARM::SP, ARM::LR, ARM::PC
812 static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
813 uint64_t Address, const void *Decoder) {
815 return MCDisassembler::Fail;
817 unsigned Register = GPRDecoderTable[RegNo];
818 Inst.addOperand(MCOperand::CreateReg(Register));
819 return MCDisassembler::Success;
823 DecodeGPRnopcRegisterClass(MCInst &Inst, unsigned RegNo,
824 uint64_t Address, const void *Decoder) {
825 DecodeStatus S = MCDisassembler::Success;
828 S = MCDisassembler::SoftFail;
830 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
836 DecodeGPRwithAPSRRegisterClass(MCInst &Inst, unsigned RegNo,
837 uint64_t Address, const void *Decoder) {
838 DecodeStatus S = MCDisassembler::Success;
842 Inst.addOperand(MCOperand::CreateReg(ARM::APSR_NZCV));
843 return MCDisassembler::Success;
846 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
850 static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
851 uint64_t Address, const void *Decoder) {
853 return MCDisassembler::Fail;
854 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
857 static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
858 uint64_t Address, const void *Decoder) {
859 unsigned Register = 0;
880 return MCDisassembler::Fail;
883 Inst.addOperand(MCOperand::CreateReg(Register));
884 return MCDisassembler::Success;
887 static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
888 uint64_t Address, const void *Decoder) {
889 if (RegNo == 13 || RegNo == 15) return MCDisassembler::Fail;
890 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
893 static const uint16_t SPRDecoderTable[] = {
894 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
895 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
896 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
897 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
898 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
899 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
900 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
901 ARM::S28, ARM::S29, ARM::S30, ARM::S31
904 static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
905 uint64_t Address, const void *Decoder) {
907 return MCDisassembler::Fail;
909 unsigned Register = SPRDecoderTable[RegNo];
910 Inst.addOperand(MCOperand::CreateReg(Register));
911 return MCDisassembler::Success;
914 static const uint16_t DPRDecoderTable[] = {
915 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
916 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
917 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
918 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
919 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
920 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
921 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
922 ARM::D28, ARM::D29, ARM::D30, ARM::D31
925 static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
926 uint64_t Address, const void *Decoder) {
928 return MCDisassembler::Fail;
930 unsigned Register = DPRDecoderTable[RegNo];
931 Inst.addOperand(MCOperand::CreateReg(Register));
932 return MCDisassembler::Success;
935 static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
936 uint64_t Address, const void *Decoder) {
938 return MCDisassembler::Fail;
939 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
943 DecodeDPR_VFP2RegisterClass(MCInst &Inst, unsigned RegNo,
944 uint64_t Address, const void *Decoder) {
946 return MCDisassembler::Fail;
947 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
950 static const uint16_t QPRDecoderTable[] = {
951 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
952 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
953 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
954 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
958 static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
959 uint64_t Address, const void *Decoder) {
960 if (RegNo > 31 || (RegNo & 1) != 0)
961 return MCDisassembler::Fail;
964 unsigned Register = QPRDecoderTable[RegNo];
965 Inst.addOperand(MCOperand::CreateReg(Register));
966 return MCDisassembler::Success;
969 static const uint16_t DPairDecoderTable[] = {
970 ARM::Q0, ARM::D1_D2, ARM::Q1, ARM::D3_D4, ARM::Q2, ARM::D5_D6,
971 ARM::Q3, ARM::D7_D8, ARM::Q4, ARM::D9_D10, ARM::Q5, ARM::D11_D12,
972 ARM::Q6, ARM::D13_D14, ARM::Q7, ARM::D15_D16, ARM::Q8, ARM::D17_D18,
973 ARM::Q9, ARM::D19_D20, ARM::Q10, ARM::D21_D22, ARM::Q11, ARM::D23_D24,
974 ARM::Q12, ARM::D25_D26, ARM::Q13, ARM::D27_D28, ARM::Q14, ARM::D29_D30,
978 static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
979 uint64_t Address, const void *Decoder) {
981 return MCDisassembler::Fail;
983 unsigned Register = DPairDecoderTable[RegNo];
984 Inst.addOperand(MCOperand::CreateReg(Register));
985 return MCDisassembler::Success;
988 static const uint16_t DPairSpacedDecoderTable[] = {
989 ARM::D0_D2, ARM::D1_D3, ARM::D2_D4, ARM::D3_D5,
990 ARM::D4_D6, ARM::D5_D7, ARM::D6_D8, ARM::D7_D9,
991 ARM::D8_D10, ARM::D9_D11, ARM::D10_D12, ARM::D11_D13,
992 ARM::D12_D14, ARM::D13_D15, ARM::D14_D16, ARM::D15_D17,
993 ARM::D16_D18, ARM::D17_D19, ARM::D18_D20, ARM::D19_D21,
994 ARM::D20_D22, ARM::D21_D23, ARM::D22_D24, ARM::D23_D25,
995 ARM::D24_D26, ARM::D25_D27, ARM::D26_D28, ARM::D27_D29,
996 ARM::D28_D30, ARM::D29_D31
999 static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
1002 const void *Decoder) {
1004 return MCDisassembler::Fail;
1006 unsigned Register = DPairSpacedDecoderTable[RegNo];
1007 Inst.addOperand(MCOperand::CreateReg(Register));
1008 return MCDisassembler::Success;
1011 static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
1012 uint64_t Address, const void *Decoder) {
1013 if (Val == 0xF) return MCDisassembler::Fail;
1014 // AL predicate is not allowed on Thumb1 branches.
1015 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
1016 return MCDisassembler::Fail;
1017 Inst.addOperand(MCOperand::CreateImm(Val));
1018 if (Val == ARMCC::AL) {
1019 Inst.addOperand(MCOperand::CreateReg(0));
1021 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1022 return MCDisassembler::Success;
1025 static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
1026 uint64_t Address, const void *Decoder) {
1028 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1030 Inst.addOperand(MCOperand::CreateReg(0));
1031 return MCDisassembler::Success;
1034 static DecodeStatus DecodeSOImmOperand(MCInst &Inst, unsigned Val,
1035 uint64_t Address, const void *Decoder) {
1036 uint32_t imm = Val & 0xFF;
1037 uint32_t rot = (Val & 0xF00) >> 7;
1038 uint32_t rot_imm = (imm >> rot) | (imm << ((32-rot) & 0x1F));
1039 Inst.addOperand(MCOperand::CreateImm(rot_imm));
1040 return MCDisassembler::Success;
1043 static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Val,
1044 uint64_t Address, const void *Decoder) {
1045 DecodeStatus S = MCDisassembler::Success;
1047 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1048 unsigned type = fieldFromInstruction(Val, 5, 2);
1049 unsigned imm = fieldFromInstruction(Val, 7, 5);
1051 // Register-immediate
1052 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1053 return MCDisassembler::Fail;
1055 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1058 Shift = ARM_AM::lsl;
1061 Shift = ARM_AM::lsr;
1064 Shift = ARM_AM::asr;
1067 Shift = ARM_AM::ror;
1071 if (Shift == ARM_AM::ror && imm == 0)
1072 Shift = ARM_AM::rrx;
1074 unsigned Op = Shift | (imm << 3);
1075 Inst.addOperand(MCOperand::CreateImm(Op));
1080 static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Val,
1081 uint64_t Address, const void *Decoder) {
1082 DecodeStatus S = MCDisassembler::Success;
1084 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1085 unsigned type = fieldFromInstruction(Val, 5, 2);
1086 unsigned Rs = fieldFromInstruction(Val, 8, 4);
1088 // Register-register
1089 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1090 return MCDisassembler::Fail;
1091 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)))
1092 return MCDisassembler::Fail;
1094 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1097 Shift = ARM_AM::lsl;
1100 Shift = ARM_AM::lsr;
1103 Shift = ARM_AM::asr;
1106 Shift = ARM_AM::ror;
1110 Inst.addOperand(MCOperand::CreateImm(Shift));
1115 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
1116 uint64_t Address, const void *Decoder) {
1117 DecodeStatus S = MCDisassembler::Success;
1119 bool writebackLoad = false;
1120 unsigned writebackReg = 0;
1121 switch (Inst.getOpcode()) {
1124 case ARM::LDMIA_UPD:
1125 case ARM::LDMDB_UPD:
1126 case ARM::LDMIB_UPD:
1127 case ARM::LDMDA_UPD:
1128 case ARM::t2LDMIA_UPD:
1129 case ARM::t2LDMDB_UPD:
1130 writebackLoad = true;
1131 writebackReg = Inst.getOperand(0).getReg();
1135 // Empty register lists are not allowed.
1136 if (Val == 0) return MCDisassembler::Fail;
1137 for (unsigned i = 0; i < 16; ++i) {
1138 if (Val & (1 << i)) {
1139 if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder)))
1140 return MCDisassembler::Fail;
1141 // Writeback not allowed if Rn is in the target list.
1142 if (writebackLoad && writebackReg == Inst.end()[-1].getReg())
1143 Check(S, MCDisassembler::SoftFail);
1150 static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
1151 uint64_t Address, const void *Decoder) {
1152 DecodeStatus S = MCDisassembler::Success;
1154 unsigned Vd = fieldFromInstruction(Val, 8, 5);
1155 unsigned regs = fieldFromInstruction(Val, 0, 8);
1157 // In case of unpredictable encoding, tweak the operands.
1158 if (regs == 0 || (Vd + regs) > 32) {
1159 regs = Vd + regs > 32 ? 32 - Vd : regs;
1160 regs = std::max( 1u, regs);
1161 S = MCDisassembler::SoftFail;
1164 if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
1165 return MCDisassembler::Fail;
1166 for (unsigned i = 0; i < (regs - 1); ++i) {
1167 if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1168 return MCDisassembler::Fail;
1174 static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
1175 uint64_t Address, const void *Decoder) {
1176 DecodeStatus S = MCDisassembler::Success;
1178 unsigned Vd = fieldFromInstruction(Val, 8, 5);
1179 unsigned regs = fieldFromInstruction(Val, 1, 7);
1181 // In case of unpredictable encoding, tweak the operands.
1182 if (regs == 0 || regs > 16 || (Vd + regs) > 32) {
1183 regs = Vd + regs > 32 ? 32 - Vd : regs;
1184 regs = std::max( 1u, regs);
1185 regs = std::min(16u, regs);
1186 S = MCDisassembler::SoftFail;
1189 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
1190 return MCDisassembler::Fail;
1191 for (unsigned i = 0; i < (regs - 1); ++i) {
1192 if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1193 return MCDisassembler::Fail;
1199 static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Val,
1200 uint64_t Address, const void *Decoder) {
1201 // This operand encodes a mask of contiguous zeros between a specified MSB
1202 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
1203 // the mask of all bits LSB-and-lower, and then xor them to create
1204 // the mask of that's all ones on [msb, lsb]. Finally we not it to
1205 // create the final mask.
1206 unsigned msb = fieldFromInstruction(Val, 5, 5);
1207 unsigned lsb = fieldFromInstruction(Val, 0, 5);
1209 DecodeStatus S = MCDisassembler::Success;
1211 Check(S, MCDisassembler::SoftFail);
1212 // The check above will cause the warning for the "potentially undefined
1213 // instruction encoding" but we can't build a bad MCOperand value here
1214 // with a lsb > msb or else printing the MCInst will cause a crash.
1218 uint32_t msb_mask = 0xFFFFFFFF;
1219 if (msb != 31) msb_mask = (1U << (msb+1)) - 1;
1220 uint32_t lsb_mask = (1U << lsb) - 1;
1222 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
1226 static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
1227 uint64_t Address, const void *Decoder) {
1228 DecodeStatus S = MCDisassembler::Success;
1230 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1231 unsigned CRd = fieldFromInstruction(Insn, 12, 4);
1232 unsigned coproc = fieldFromInstruction(Insn, 8, 4);
1233 unsigned imm = fieldFromInstruction(Insn, 0, 8);
1234 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1235 unsigned U = fieldFromInstruction(Insn, 23, 1);
1237 switch (Inst.getOpcode()) {
1238 case ARM::LDC_OFFSET:
1241 case ARM::LDC_OPTION:
1242 case ARM::LDCL_OFFSET:
1244 case ARM::LDCL_POST:
1245 case ARM::LDCL_OPTION:
1246 case ARM::STC_OFFSET:
1249 case ARM::STC_OPTION:
1250 case ARM::STCL_OFFSET:
1252 case ARM::STCL_POST:
1253 case ARM::STCL_OPTION:
1254 case ARM::t2LDC_OFFSET:
1255 case ARM::t2LDC_PRE:
1256 case ARM::t2LDC_POST:
1257 case ARM::t2LDC_OPTION:
1258 case ARM::t2LDCL_OFFSET:
1259 case ARM::t2LDCL_PRE:
1260 case ARM::t2LDCL_POST:
1261 case ARM::t2LDCL_OPTION:
1262 case ARM::t2STC_OFFSET:
1263 case ARM::t2STC_PRE:
1264 case ARM::t2STC_POST:
1265 case ARM::t2STC_OPTION:
1266 case ARM::t2STCL_OFFSET:
1267 case ARM::t2STCL_PRE:
1268 case ARM::t2STCL_POST:
1269 case ARM::t2STCL_OPTION:
1270 if (coproc == 0xA || coproc == 0xB)
1271 return MCDisassembler::Fail;
1277 Inst.addOperand(MCOperand::CreateImm(coproc));
1278 Inst.addOperand(MCOperand::CreateImm(CRd));
1279 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1280 return MCDisassembler::Fail;
1282 switch (Inst.getOpcode()) {
1283 case ARM::t2LDC2_OFFSET:
1284 case ARM::t2LDC2L_OFFSET:
1285 case ARM::t2LDC2_PRE:
1286 case ARM::t2LDC2L_PRE:
1287 case ARM::t2STC2_OFFSET:
1288 case ARM::t2STC2L_OFFSET:
1289 case ARM::t2STC2_PRE:
1290 case ARM::t2STC2L_PRE:
1291 case ARM::LDC2_OFFSET:
1292 case ARM::LDC2L_OFFSET:
1294 case ARM::LDC2L_PRE:
1295 case ARM::STC2_OFFSET:
1296 case ARM::STC2L_OFFSET:
1298 case ARM::STC2L_PRE:
1299 case ARM::t2LDC_OFFSET:
1300 case ARM::t2LDCL_OFFSET:
1301 case ARM::t2LDC_PRE:
1302 case ARM::t2LDCL_PRE:
1303 case ARM::t2STC_OFFSET:
1304 case ARM::t2STCL_OFFSET:
1305 case ARM::t2STC_PRE:
1306 case ARM::t2STCL_PRE:
1307 case ARM::LDC_OFFSET:
1308 case ARM::LDCL_OFFSET:
1311 case ARM::STC_OFFSET:
1312 case ARM::STCL_OFFSET:
1315 imm = ARM_AM::getAM5Opc(U ? ARM_AM::add : ARM_AM::sub, imm);
1316 Inst.addOperand(MCOperand::CreateImm(imm));
1318 case ARM::t2LDC2_POST:
1319 case ARM::t2LDC2L_POST:
1320 case ARM::t2STC2_POST:
1321 case ARM::t2STC2L_POST:
1322 case ARM::LDC2_POST:
1323 case ARM::LDC2L_POST:
1324 case ARM::STC2_POST:
1325 case ARM::STC2L_POST:
1326 case ARM::t2LDC_POST:
1327 case ARM::t2LDCL_POST:
1328 case ARM::t2STC_POST:
1329 case ARM::t2STCL_POST:
1331 case ARM::LDCL_POST:
1333 case ARM::STCL_POST:
1337 // The 'option' variant doesn't encode 'U' in the immediate since
1338 // the immediate is unsigned [0,255].
1339 Inst.addOperand(MCOperand::CreateImm(imm));
1343 switch (Inst.getOpcode()) {
1344 case ARM::LDC_OFFSET:
1347 case ARM::LDC_OPTION:
1348 case ARM::LDCL_OFFSET:
1350 case ARM::LDCL_POST:
1351 case ARM::LDCL_OPTION:
1352 case ARM::STC_OFFSET:
1355 case ARM::STC_OPTION:
1356 case ARM::STCL_OFFSET:
1358 case ARM::STCL_POST:
1359 case ARM::STCL_OPTION:
1360 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1361 return MCDisassembler::Fail;
1371 DecodeAddrMode2IdxInstruction(MCInst &Inst, unsigned Insn,
1372 uint64_t Address, const void *Decoder) {
1373 DecodeStatus S = MCDisassembler::Success;
1375 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1376 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1377 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1378 unsigned imm = fieldFromInstruction(Insn, 0, 12);
1379 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1380 unsigned reg = fieldFromInstruction(Insn, 25, 1);
1381 unsigned P = fieldFromInstruction(Insn, 24, 1);
1382 unsigned W = fieldFromInstruction(Insn, 21, 1);
1384 // On stores, the writeback operand precedes Rt.
1385 switch (Inst.getOpcode()) {
1386 case ARM::STR_POST_IMM:
1387 case ARM::STR_POST_REG:
1388 case ARM::STRB_POST_IMM:
1389 case ARM::STRB_POST_REG:
1390 case ARM::STRT_POST_REG:
1391 case ARM::STRT_POST_IMM:
1392 case ARM::STRBT_POST_REG:
1393 case ARM::STRBT_POST_IMM:
1394 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1395 return MCDisassembler::Fail;
1401 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1402 return MCDisassembler::Fail;
1404 // On loads, the writeback operand comes after Rt.
1405 switch (Inst.getOpcode()) {
1406 case ARM::LDR_POST_IMM:
1407 case ARM::LDR_POST_REG:
1408 case ARM::LDRB_POST_IMM:
1409 case ARM::LDRB_POST_REG:
1410 case ARM::LDRBT_POST_REG:
1411 case ARM::LDRBT_POST_IMM:
1412 case ARM::LDRT_POST_REG:
1413 case ARM::LDRT_POST_IMM:
1414 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1415 return MCDisassembler::Fail;
1421 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1422 return MCDisassembler::Fail;
1424 ARM_AM::AddrOpc Op = ARM_AM::add;
1425 if (!fieldFromInstruction(Insn, 23, 1))
1428 bool writeback = (P == 0) || (W == 1);
1429 unsigned idx_mode = 0;
1431 idx_mode = ARMII::IndexModePre;
1432 else if (!P && writeback)
1433 idx_mode = ARMII::IndexModePost;
1435 if (writeback && (Rn == 15 || Rn == Rt))
1436 S = MCDisassembler::SoftFail; // UNPREDICTABLE
1439 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1440 return MCDisassembler::Fail;
1441 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1442 switch( fieldFromInstruction(Insn, 5, 2)) {
1456 return MCDisassembler::Fail;
1458 unsigned amt = fieldFromInstruction(Insn, 7, 5);
1459 if (Opc == ARM_AM::ror && amt == 0)
1461 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1463 Inst.addOperand(MCOperand::CreateImm(imm));
1465 Inst.addOperand(MCOperand::CreateReg(0));
1466 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1467 Inst.addOperand(MCOperand::CreateImm(tmp));
1470 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1471 return MCDisassembler::Fail;
1476 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Val,
1477 uint64_t Address, const void *Decoder) {
1478 DecodeStatus S = MCDisassembler::Success;
1480 unsigned Rn = fieldFromInstruction(Val, 13, 4);
1481 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1482 unsigned type = fieldFromInstruction(Val, 5, 2);
1483 unsigned imm = fieldFromInstruction(Val, 7, 5);
1484 unsigned U = fieldFromInstruction(Val, 12, 1);
1486 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1502 if (ShOp == ARM_AM::ror && imm == 0)
1505 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1506 return MCDisassembler::Fail;
1507 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1508 return MCDisassembler::Fail;
1511 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1513 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1514 Inst.addOperand(MCOperand::CreateImm(shift));
1520 DecodeAddrMode3Instruction(MCInst &Inst, unsigned Insn,
1521 uint64_t Address, const void *Decoder) {
1522 DecodeStatus S = MCDisassembler::Success;
1524 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1525 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1526 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1527 unsigned type = fieldFromInstruction(Insn, 22, 1);
1528 unsigned imm = fieldFromInstruction(Insn, 8, 4);
1529 unsigned U = ((~fieldFromInstruction(Insn, 23, 1)) & 1) << 8;
1530 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1531 unsigned W = fieldFromInstruction(Insn, 21, 1);
1532 unsigned P = fieldFromInstruction(Insn, 24, 1);
1533 unsigned Rt2 = Rt + 1;
1535 bool writeback = (W == 1) | (P == 0);
1537 // For {LD,ST}RD, Rt must be even, else undefined.
1538 switch (Inst.getOpcode()) {
1541 case ARM::STRD_POST:
1544 case ARM::LDRD_POST:
1545 if (Rt & 0x1) S = MCDisassembler::SoftFail;
1550 switch (Inst.getOpcode()) {
1553 case ARM::STRD_POST:
1554 if (P == 0 && W == 1)
1555 S = MCDisassembler::SoftFail;
1557 if (writeback && (Rn == 15 || Rn == Rt || Rn == Rt2))
1558 S = MCDisassembler::SoftFail;
1559 if (type && Rm == 15)
1560 S = MCDisassembler::SoftFail;
1562 S = MCDisassembler::SoftFail;
1563 if (!type && fieldFromInstruction(Insn, 8, 4))
1564 S = MCDisassembler::SoftFail;
1568 case ARM::STRH_POST:
1570 S = MCDisassembler::SoftFail;
1571 if (writeback && (Rn == 15 || Rn == Rt))
1572 S = MCDisassembler::SoftFail;
1573 if (!type && Rm == 15)
1574 S = MCDisassembler::SoftFail;
1578 case ARM::LDRD_POST:
1579 if (type && Rn == 15){
1581 S = MCDisassembler::SoftFail;
1584 if (P == 0 && W == 1)
1585 S = MCDisassembler::SoftFail;
1586 if (!type && (Rt2 == 15 || Rm == 15 || Rm == Rt || Rm == Rt2))
1587 S = MCDisassembler::SoftFail;
1588 if (!type && writeback && Rn == 15)
1589 S = MCDisassembler::SoftFail;
1590 if (writeback && (Rn == Rt || Rn == Rt2))
1591 S = MCDisassembler::SoftFail;
1595 case ARM::LDRH_POST:
1596 if (type && Rn == 15){
1598 S = MCDisassembler::SoftFail;
1602 S = MCDisassembler::SoftFail;
1603 if (!type && Rm == 15)
1604 S = MCDisassembler::SoftFail;
1605 if (!type && writeback && (Rn == 15 || Rn == Rt))
1606 S = MCDisassembler::SoftFail;
1609 case ARM::LDRSH_PRE:
1610 case ARM::LDRSH_POST:
1612 case ARM::LDRSB_PRE:
1613 case ARM::LDRSB_POST:
1614 if (type && Rn == 15){
1616 S = MCDisassembler::SoftFail;
1619 if (type && (Rt == 15 || (writeback && Rn == Rt)))
1620 S = MCDisassembler::SoftFail;
1621 if (!type && (Rt == 15 || Rm == 15))
1622 S = MCDisassembler::SoftFail;
1623 if (!type && writeback && (Rn == 15 || Rn == Rt))
1624 S = MCDisassembler::SoftFail;
1630 if (writeback) { // Writeback
1632 U |= ARMII::IndexModePre << 9;
1634 U |= ARMII::IndexModePost << 9;
1636 // On stores, the writeback operand precedes Rt.
1637 switch (Inst.getOpcode()) {
1640 case ARM::STRD_POST:
1643 case ARM::STRH_POST:
1644 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1645 return MCDisassembler::Fail;
1652 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1653 return MCDisassembler::Fail;
1654 switch (Inst.getOpcode()) {
1657 case ARM::STRD_POST:
1660 case ARM::LDRD_POST:
1661 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
1662 return MCDisassembler::Fail;
1669 // On loads, the writeback operand comes after Rt.
1670 switch (Inst.getOpcode()) {
1673 case ARM::LDRD_POST:
1676 case ARM::LDRH_POST:
1678 case ARM::LDRSH_PRE:
1679 case ARM::LDRSH_POST:
1681 case ARM::LDRSB_PRE:
1682 case ARM::LDRSB_POST:
1685 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1686 return MCDisassembler::Fail;
1693 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1694 return MCDisassembler::Fail;
1697 Inst.addOperand(MCOperand::CreateReg(0));
1698 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1700 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1701 return MCDisassembler::Fail;
1702 Inst.addOperand(MCOperand::CreateImm(U));
1705 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1706 return MCDisassembler::Fail;
1711 static DecodeStatus DecodeRFEInstruction(MCInst &Inst, unsigned Insn,
1712 uint64_t Address, const void *Decoder) {
1713 DecodeStatus S = MCDisassembler::Success;
1715 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1716 unsigned mode = fieldFromInstruction(Insn, 23, 2);
1733 Inst.addOperand(MCOperand::CreateImm(mode));
1734 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1735 return MCDisassembler::Fail;
1740 static DecodeStatus DecodeQADDInstruction(MCInst &Inst, unsigned Insn,
1741 uint64_t Address, const void *Decoder) {
1742 DecodeStatus S = MCDisassembler::Success;
1744 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
1745 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1746 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1747 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1750 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
1752 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1753 return MCDisassembler::Fail;
1754 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1755 return MCDisassembler::Fail;
1756 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
1757 return MCDisassembler::Fail;
1758 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1759 return MCDisassembler::Fail;
1763 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst &Inst,
1765 uint64_t Address, const void *Decoder) {
1766 DecodeStatus S = MCDisassembler::Success;
1768 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1769 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1770 unsigned reglist = fieldFromInstruction(Insn, 0, 16);
1773 // Ambiguous with RFE and SRS
1774 switch (Inst.getOpcode()) {
1776 Inst.setOpcode(ARM::RFEDA);
1778 case ARM::LDMDA_UPD:
1779 Inst.setOpcode(ARM::RFEDA_UPD);
1782 Inst.setOpcode(ARM::RFEDB);
1784 case ARM::LDMDB_UPD:
1785 Inst.setOpcode(ARM::RFEDB_UPD);
1788 Inst.setOpcode(ARM::RFEIA);
1790 case ARM::LDMIA_UPD:
1791 Inst.setOpcode(ARM::RFEIA_UPD);
1794 Inst.setOpcode(ARM::RFEIB);
1796 case ARM::LDMIB_UPD:
1797 Inst.setOpcode(ARM::RFEIB_UPD);
1800 Inst.setOpcode(ARM::SRSDA);
1802 case ARM::STMDA_UPD:
1803 Inst.setOpcode(ARM::SRSDA_UPD);
1806 Inst.setOpcode(ARM::SRSDB);
1808 case ARM::STMDB_UPD:
1809 Inst.setOpcode(ARM::SRSDB_UPD);
1812 Inst.setOpcode(ARM::SRSIA);
1814 case ARM::STMIA_UPD:
1815 Inst.setOpcode(ARM::SRSIA_UPD);
1818 Inst.setOpcode(ARM::SRSIB);
1820 case ARM::STMIB_UPD:
1821 Inst.setOpcode(ARM::SRSIB_UPD);
1824 return MCDisassembler::Fail;
1827 // For stores (which become SRS's, the only operand is the mode.
1828 if (fieldFromInstruction(Insn, 20, 1) == 0) {
1829 // Check SRS encoding constraints
1830 if (!(fieldFromInstruction(Insn, 22, 1) == 1 &&
1831 fieldFromInstruction(Insn, 20, 1) == 0))
1832 return MCDisassembler::Fail;
1835 MCOperand::CreateImm(fieldFromInstruction(Insn, 0, 4)));
1839 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1842 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1843 return MCDisassembler::Fail;
1844 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1845 return MCDisassembler::Fail; // Tied
1846 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1847 return MCDisassembler::Fail;
1848 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
1849 return MCDisassembler::Fail;
1854 static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
1855 uint64_t Address, const void *Decoder) {
1856 unsigned imod = fieldFromInstruction(Insn, 18, 2);
1857 unsigned M = fieldFromInstruction(Insn, 17, 1);
1858 unsigned iflags = fieldFromInstruction(Insn, 6, 3);
1859 unsigned mode = fieldFromInstruction(Insn, 0, 5);
1861 DecodeStatus S = MCDisassembler::Success;
1863 // This decoder is called from multiple location that do not check
1864 // the full encoding is valid before they do.
1865 if (fieldFromInstruction(Insn, 5, 1) != 0 ||
1866 fieldFromInstruction(Insn, 16, 1) != 0 ||
1867 fieldFromInstruction(Insn, 20, 8) != 0x10)
1868 return MCDisassembler::Fail;
1870 // imod == '01' --> UNPREDICTABLE
1871 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1872 // return failure here. The '01' imod value is unprintable, so there's
1873 // nothing useful we could do even if we returned UNPREDICTABLE.
1875 if (imod == 1) return MCDisassembler::Fail;
1878 Inst.setOpcode(ARM::CPS3p);
1879 Inst.addOperand(MCOperand::CreateImm(imod));
1880 Inst.addOperand(MCOperand::CreateImm(iflags));
1881 Inst.addOperand(MCOperand::CreateImm(mode));
1882 } else if (imod && !M) {
1883 Inst.setOpcode(ARM::CPS2p);
1884 Inst.addOperand(MCOperand::CreateImm(imod));
1885 Inst.addOperand(MCOperand::CreateImm(iflags));
1886 if (mode) S = MCDisassembler::SoftFail;
1887 } else if (!imod && M) {
1888 Inst.setOpcode(ARM::CPS1p);
1889 Inst.addOperand(MCOperand::CreateImm(mode));
1890 if (iflags) S = MCDisassembler::SoftFail;
1892 // imod == '00' && M == '0' --> UNPREDICTABLE
1893 Inst.setOpcode(ARM::CPS1p);
1894 Inst.addOperand(MCOperand::CreateImm(mode));
1895 S = MCDisassembler::SoftFail;
1901 static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
1902 uint64_t Address, const void *Decoder) {
1903 unsigned imod = fieldFromInstruction(Insn, 9, 2);
1904 unsigned M = fieldFromInstruction(Insn, 8, 1);
1905 unsigned iflags = fieldFromInstruction(Insn, 5, 3);
1906 unsigned mode = fieldFromInstruction(Insn, 0, 5);
1908 DecodeStatus S = MCDisassembler::Success;
1910 // imod == '01' --> UNPREDICTABLE
1911 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1912 // return failure here. The '01' imod value is unprintable, so there's
1913 // nothing useful we could do even if we returned UNPREDICTABLE.
1915 if (imod == 1) return MCDisassembler::Fail;
1918 Inst.setOpcode(ARM::t2CPS3p);
1919 Inst.addOperand(MCOperand::CreateImm(imod));
1920 Inst.addOperand(MCOperand::CreateImm(iflags));
1921 Inst.addOperand(MCOperand::CreateImm(mode));
1922 } else if (imod && !M) {
1923 Inst.setOpcode(ARM::t2CPS2p);
1924 Inst.addOperand(MCOperand::CreateImm(imod));
1925 Inst.addOperand(MCOperand::CreateImm(iflags));
1926 if (mode) S = MCDisassembler::SoftFail;
1927 } else if (!imod && M) {
1928 Inst.setOpcode(ARM::t2CPS1p);
1929 Inst.addOperand(MCOperand::CreateImm(mode));
1930 if (iflags) S = MCDisassembler::SoftFail;
1932 // imod == '00' && M == '0' --> this is a HINT instruction
1933 int imm = fieldFromInstruction(Insn, 0, 8);
1934 // HINT are defined only for immediate in [0..4]
1935 if(imm > 4) return MCDisassembler::Fail;
1936 Inst.setOpcode(ARM::t2HINT);
1937 Inst.addOperand(MCOperand::CreateImm(imm));
1943 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
1944 uint64_t Address, const void *Decoder) {
1945 DecodeStatus S = MCDisassembler::Success;
1947 unsigned Rd = fieldFromInstruction(Insn, 8, 4);
1950 imm |= (fieldFromInstruction(Insn, 0, 8) << 0);
1951 imm |= (fieldFromInstruction(Insn, 12, 3) << 8);
1952 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
1953 imm |= (fieldFromInstruction(Insn, 26, 1) << 11);
1955 if (Inst.getOpcode() == ARM::t2MOVTi16)
1956 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1957 return MCDisassembler::Fail;
1958 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
1959 return MCDisassembler::Fail;
1961 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
1962 Inst.addOperand(MCOperand::CreateImm(imm));
1967 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
1968 uint64_t Address, const void *Decoder) {
1969 DecodeStatus S = MCDisassembler::Success;
1971 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
1972 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1975 imm |= (fieldFromInstruction(Insn, 0, 12) << 0);
1976 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
1978 if (Inst.getOpcode() == ARM::MOVTi16)
1979 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1980 return MCDisassembler::Fail;
1982 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1983 return MCDisassembler::Fail;
1985 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
1986 Inst.addOperand(MCOperand::CreateImm(imm));
1988 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1989 return MCDisassembler::Fail;
1994 static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
1995 uint64_t Address, const void *Decoder) {
1996 DecodeStatus S = MCDisassembler::Success;
1998 unsigned Rd = fieldFromInstruction(Insn, 16, 4);
1999 unsigned Rn = fieldFromInstruction(Insn, 0, 4);
2000 unsigned Rm = fieldFromInstruction(Insn, 8, 4);
2001 unsigned Ra = fieldFromInstruction(Insn, 12, 4);
2002 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2005 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
2007 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2008 return MCDisassembler::Fail;
2009 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
2010 return MCDisassembler::Fail;
2011 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
2012 return MCDisassembler::Fail;
2013 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
2014 return MCDisassembler::Fail;
2016 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2017 return MCDisassembler::Fail;
2022 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
2023 uint64_t Address, const void *Decoder) {
2024 DecodeStatus S = MCDisassembler::Success;
2026 unsigned add = fieldFromInstruction(Val, 12, 1);
2027 unsigned imm = fieldFromInstruction(Val, 0, 12);
2028 unsigned Rn = fieldFromInstruction(Val, 13, 4);
2030 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2031 return MCDisassembler::Fail;
2033 if (!add) imm *= -1;
2034 if (imm == 0 && !add) imm = INT32_MIN;
2035 Inst.addOperand(MCOperand::CreateImm(imm));
2037 tryAddingPcLoadReferenceComment(Address, Address + imm + 8, Decoder);
2042 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
2043 uint64_t Address, const void *Decoder) {
2044 DecodeStatus S = MCDisassembler::Success;
2046 unsigned Rn = fieldFromInstruction(Val, 9, 4);
2047 unsigned U = fieldFromInstruction(Val, 8, 1);
2048 unsigned imm = fieldFromInstruction(Val, 0, 8);
2050 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2051 return MCDisassembler::Fail;
2054 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
2056 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
2061 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
2062 uint64_t Address, const void *Decoder) {
2063 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
2067 DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
2068 uint64_t Address, const void *Decoder) {
2069 DecodeStatus Status = MCDisassembler::Success;
2071 // Note the J1 and J2 values are from the encoded instruction. So here
2072 // change them to I1 and I2 values via as documented:
2073 // I1 = NOT(J1 EOR S);
2074 // I2 = NOT(J2 EOR S);
2075 // and build the imm32 with one trailing zero as documented:
2076 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
2077 unsigned S = fieldFromInstruction(Insn, 26, 1);
2078 unsigned J1 = fieldFromInstruction(Insn, 13, 1);
2079 unsigned J2 = fieldFromInstruction(Insn, 11, 1);
2080 unsigned I1 = !(J1 ^ S);
2081 unsigned I2 = !(J2 ^ S);
2082 unsigned imm10 = fieldFromInstruction(Insn, 16, 10);
2083 unsigned imm11 = fieldFromInstruction(Insn, 0, 11);
2084 unsigned tmp = (S << 23) | (I1 << 22) | (I2 << 21) | (imm10 << 11) | imm11;
2085 int imm32 = SignExtend32<24>(tmp << 1);
2086 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
2087 true, 4, Inst, Decoder))
2088 Inst.addOperand(MCOperand::CreateImm(imm32));
2094 DecodeBranchImmInstruction(MCInst &Inst, unsigned Insn,
2095 uint64_t Address, const void *Decoder) {
2096 DecodeStatus S = MCDisassembler::Success;
2098 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2099 unsigned imm = fieldFromInstruction(Insn, 0, 24) << 2;
2102 Inst.setOpcode(ARM::BLXi);
2103 imm |= fieldFromInstruction(Insn, 24, 1) << 1;
2104 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2105 true, 4, Inst, Decoder))
2106 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2110 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2111 true, 4, Inst, Decoder))
2112 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2113 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2114 return MCDisassembler::Fail;
2120 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
2121 uint64_t Address, const void *Decoder) {
2122 DecodeStatus S = MCDisassembler::Success;
2124 unsigned Rm = fieldFromInstruction(Val, 0, 4);
2125 unsigned align = fieldFromInstruction(Val, 4, 2);
2127 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2128 return MCDisassembler::Fail;
2130 Inst.addOperand(MCOperand::CreateImm(0));
2132 Inst.addOperand(MCOperand::CreateImm(4 << align));
2137 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Insn,
2138 uint64_t Address, const void *Decoder) {
2139 DecodeStatus S = MCDisassembler::Success;
2141 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2142 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2143 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2144 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2145 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2146 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2148 // First output register
2149 switch (Inst.getOpcode()) {
2150 case ARM::VLD1q16: case ARM::VLD1q32: case ARM::VLD1q64: case ARM::VLD1q8:
2151 case ARM::VLD1q16wb_fixed: case ARM::VLD1q16wb_register:
2152 case ARM::VLD1q32wb_fixed: case ARM::VLD1q32wb_register:
2153 case ARM::VLD1q64wb_fixed: case ARM::VLD1q64wb_register:
2154 case ARM::VLD1q8wb_fixed: case ARM::VLD1q8wb_register:
2155 case ARM::VLD2d16: case ARM::VLD2d32: case ARM::VLD2d8:
2156 case ARM::VLD2d16wb_fixed: case ARM::VLD2d16wb_register:
2157 case ARM::VLD2d32wb_fixed: case ARM::VLD2d32wb_register:
2158 case ARM::VLD2d8wb_fixed: case ARM::VLD2d8wb_register:
2159 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2160 return MCDisassembler::Fail;
2165 case ARM::VLD2b16wb_fixed:
2166 case ARM::VLD2b16wb_register:
2167 case ARM::VLD2b32wb_fixed:
2168 case ARM::VLD2b32wb_register:
2169 case ARM::VLD2b8wb_fixed:
2170 case ARM::VLD2b8wb_register:
2171 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2172 return MCDisassembler::Fail;
2175 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2176 return MCDisassembler::Fail;
2179 // Second output register
2180 switch (Inst.getOpcode()) {
2184 case ARM::VLD3d8_UPD:
2185 case ARM::VLD3d16_UPD:
2186 case ARM::VLD3d32_UPD:
2190 case ARM::VLD4d8_UPD:
2191 case ARM::VLD4d16_UPD:
2192 case ARM::VLD4d32_UPD:
2193 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2194 return MCDisassembler::Fail;
2199 case ARM::VLD3q8_UPD:
2200 case ARM::VLD3q16_UPD:
2201 case ARM::VLD3q32_UPD:
2205 case ARM::VLD4q8_UPD:
2206 case ARM::VLD4q16_UPD:
2207 case ARM::VLD4q32_UPD:
2208 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2209 return MCDisassembler::Fail;
2214 // Third output register
2215 switch(Inst.getOpcode()) {
2219 case ARM::VLD3d8_UPD:
2220 case ARM::VLD3d16_UPD:
2221 case ARM::VLD3d32_UPD:
2225 case ARM::VLD4d8_UPD:
2226 case ARM::VLD4d16_UPD:
2227 case ARM::VLD4d32_UPD:
2228 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2229 return MCDisassembler::Fail;
2234 case ARM::VLD3q8_UPD:
2235 case ARM::VLD3q16_UPD:
2236 case ARM::VLD3q32_UPD:
2240 case ARM::VLD4q8_UPD:
2241 case ARM::VLD4q16_UPD:
2242 case ARM::VLD4q32_UPD:
2243 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2244 return MCDisassembler::Fail;
2250 // Fourth output register
2251 switch (Inst.getOpcode()) {
2255 case ARM::VLD4d8_UPD:
2256 case ARM::VLD4d16_UPD:
2257 case ARM::VLD4d32_UPD:
2258 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2259 return MCDisassembler::Fail;
2264 case ARM::VLD4q8_UPD:
2265 case ARM::VLD4q16_UPD:
2266 case ARM::VLD4q32_UPD:
2267 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2268 return MCDisassembler::Fail;
2274 // Writeback operand
2275 switch (Inst.getOpcode()) {
2276 case ARM::VLD1d8wb_fixed:
2277 case ARM::VLD1d16wb_fixed:
2278 case ARM::VLD1d32wb_fixed:
2279 case ARM::VLD1d64wb_fixed:
2280 case ARM::VLD1d8wb_register:
2281 case ARM::VLD1d16wb_register:
2282 case ARM::VLD1d32wb_register:
2283 case ARM::VLD1d64wb_register:
2284 case ARM::VLD1q8wb_fixed:
2285 case ARM::VLD1q16wb_fixed:
2286 case ARM::VLD1q32wb_fixed:
2287 case ARM::VLD1q64wb_fixed:
2288 case ARM::VLD1q8wb_register:
2289 case ARM::VLD1q16wb_register:
2290 case ARM::VLD1q32wb_register:
2291 case ARM::VLD1q64wb_register:
2292 case ARM::VLD1d8Twb_fixed:
2293 case ARM::VLD1d8Twb_register:
2294 case ARM::VLD1d16Twb_fixed:
2295 case ARM::VLD1d16Twb_register:
2296 case ARM::VLD1d32Twb_fixed:
2297 case ARM::VLD1d32Twb_register:
2298 case ARM::VLD1d64Twb_fixed:
2299 case ARM::VLD1d64Twb_register:
2300 case ARM::VLD1d8Qwb_fixed:
2301 case ARM::VLD1d8Qwb_register:
2302 case ARM::VLD1d16Qwb_fixed:
2303 case ARM::VLD1d16Qwb_register:
2304 case ARM::VLD1d32Qwb_fixed:
2305 case ARM::VLD1d32Qwb_register:
2306 case ARM::VLD1d64Qwb_fixed:
2307 case ARM::VLD1d64Qwb_register:
2308 case ARM::VLD2d8wb_fixed:
2309 case ARM::VLD2d16wb_fixed:
2310 case ARM::VLD2d32wb_fixed:
2311 case ARM::VLD2q8wb_fixed:
2312 case ARM::VLD2q16wb_fixed:
2313 case ARM::VLD2q32wb_fixed:
2314 case ARM::VLD2d8wb_register:
2315 case ARM::VLD2d16wb_register:
2316 case ARM::VLD2d32wb_register:
2317 case ARM::VLD2q8wb_register:
2318 case ARM::VLD2q16wb_register:
2319 case ARM::VLD2q32wb_register:
2320 case ARM::VLD2b8wb_fixed:
2321 case ARM::VLD2b16wb_fixed:
2322 case ARM::VLD2b32wb_fixed:
2323 case ARM::VLD2b8wb_register:
2324 case ARM::VLD2b16wb_register:
2325 case ARM::VLD2b32wb_register:
2326 Inst.addOperand(MCOperand::CreateImm(0));
2328 case ARM::VLD3d8_UPD:
2329 case ARM::VLD3d16_UPD:
2330 case ARM::VLD3d32_UPD:
2331 case ARM::VLD3q8_UPD:
2332 case ARM::VLD3q16_UPD:
2333 case ARM::VLD3q32_UPD:
2334 case ARM::VLD4d8_UPD:
2335 case ARM::VLD4d16_UPD:
2336 case ARM::VLD4d32_UPD:
2337 case ARM::VLD4q8_UPD:
2338 case ARM::VLD4q16_UPD:
2339 case ARM::VLD4q32_UPD:
2340 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2341 return MCDisassembler::Fail;
2347 // AddrMode6 Base (register+alignment)
2348 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2349 return MCDisassembler::Fail;
2351 // AddrMode6 Offset (register)
2352 switch (Inst.getOpcode()) {
2354 // The below have been updated to have explicit am6offset split
2355 // between fixed and register offset. For those instructions not
2356 // yet updated, we need to add an additional reg0 operand for the
2359 // The fixed offset encodes as Rm == 0xd, so we check for that.
2361 Inst.addOperand(MCOperand::CreateReg(0));
2364 // Fall through to handle the register offset variant.
2365 case ARM::VLD1d8wb_fixed:
2366 case ARM::VLD1d16wb_fixed:
2367 case ARM::VLD1d32wb_fixed:
2368 case ARM::VLD1d64wb_fixed:
2369 case ARM::VLD1d8Twb_fixed:
2370 case ARM::VLD1d16Twb_fixed:
2371 case ARM::VLD1d32Twb_fixed:
2372 case ARM::VLD1d64Twb_fixed:
2373 case ARM::VLD1d8Qwb_fixed:
2374 case ARM::VLD1d16Qwb_fixed:
2375 case ARM::VLD1d32Qwb_fixed:
2376 case ARM::VLD1d64Qwb_fixed:
2377 case ARM::VLD1d8wb_register:
2378 case ARM::VLD1d16wb_register:
2379 case ARM::VLD1d32wb_register:
2380 case ARM::VLD1d64wb_register:
2381 case ARM::VLD1q8wb_fixed:
2382 case ARM::VLD1q16wb_fixed:
2383 case ARM::VLD1q32wb_fixed:
2384 case ARM::VLD1q64wb_fixed:
2385 case ARM::VLD1q8wb_register:
2386 case ARM::VLD1q16wb_register:
2387 case ARM::VLD1q32wb_register:
2388 case ARM::VLD1q64wb_register:
2389 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2390 // variant encodes Rm == 0xf. Anything else is a register offset post-
2391 // increment and we need to add the register operand to the instruction.
2392 if (Rm != 0xD && Rm != 0xF &&
2393 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2394 return MCDisassembler::Fail;
2396 case ARM::VLD2d8wb_fixed:
2397 case ARM::VLD2d16wb_fixed:
2398 case ARM::VLD2d32wb_fixed:
2399 case ARM::VLD2b8wb_fixed:
2400 case ARM::VLD2b16wb_fixed:
2401 case ARM::VLD2b32wb_fixed:
2402 case ARM::VLD2q8wb_fixed:
2403 case ARM::VLD2q16wb_fixed:
2404 case ARM::VLD2q32wb_fixed:
2411 static DecodeStatus DecodeVST1Instruction(MCInst& Inst, unsigned Insn,
2412 uint64_t Addr, const void* Decoder) {
2413 unsigned type = fieldFromInstruction(Insn, 8, 4);
2414 unsigned align = fieldFromInstruction(Insn, 4, 2);
2415 if(type == 7 && (align & 2)) return MCDisassembler::Fail;
2416 if(type == 10 && align == 3) return MCDisassembler::Fail;
2417 if(type == 6 && (align & 2)) return MCDisassembler::Fail;
2419 return DecodeVSTInstruction(Inst, Insn, Addr, Decoder);
2422 static DecodeStatus DecodeVST2Instruction(MCInst& Inst, unsigned Insn,
2423 uint64_t Addr, const void* Decoder) {
2424 unsigned size = fieldFromInstruction(Insn, 6, 2);
2425 if(size == 3) return MCDisassembler::Fail;
2427 unsigned type = fieldFromInstruction(Insn, 8, 4);
2428 unsigned align = fieldFromInstruction(Insn, 4, 2);
2429 if(type == 8 && align == 3) return MCDisassembler::Fail;
2430 if(type == 9 && align == 3) return MCDisassembler::Fail;
2432 return DecodeVSTInstruction(Inst, Insn, Addr, Decoder);
2435 static DecodeStatus DecodeVST3Instruction(MCInst& Inst, unsigned Insn,
2436 uint64_t Addr, const void* Decoder) {
2437 unsigned size = fieldFromInstruction(Insn, 6, 2);
2438 if(size == 3) return MCDisassembler::Fail;
2440 unsigned align = fieldFromInstruction(Insn, 4, 2);
2441 if(align & 2) return MCDisassembler::Fail;
2443 return DecodeVSTInstruction(Inst, Insn, Addr, Decoder);
2446 static DecodeStatus DecodeVST4Instruction(MCInst& Inst, unsigned Insn,
2447 uint64_t Addr, const void* Decoder) {
2448 unsigned size = fieldFromInstruction(Insn, 6, 2);
2449 if(size == 3) return MCDisassembler::Fail;
2451 return DecodeVSTInstruction(Inst, Insn, Addr, Decoder);
2454 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Insn,
2455 uint64_t Address, const void *Decoder) {
2456 DecodeStatus S = MCDisassembler::Success;
2458 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2459 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2460 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2461 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2462 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2463 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2465 // Writeback Operand
2466 switch (Inst.getOpcode()) {
2467 case ARM::VST1d8wb_fixed:
2468 case ARM::VST1d16wb_fixed:
2469 case ARM::VST1d32wb_fixed:
2470 case ARM::VST1d64wb_fixed:
2471 case ARM::VST1d8wb_register:
2472 case ARM::VST1d16wb_register:
2473 case ARM::VST1d32wb_register:
2474 case ARM::VST1d64wb_register:
2475 case ARM::VST1q8wb_fixed:
2476 case ARM::VST1q16wb_fixed:
2477 case ARM::VST1q32wb_fixed:
2478 case ARM::VST1q64wb_fixed:
2479 case ARM::VST1q8wb_register:
2480 case ARM::VST1q16wb_register:
2481 case ARM::VST1q32wb_register:
2482 case ARM::VST1q64wb_register:
2483 case ARM::VST1d8Twb_fixed:
2484 case ARM::VST1d16Twb_fixed:
2485 case ARM::VST1d32Twb_fixed:
2486 case ARM::VST1d64Twb_fixed:
2487 case ARM::VST1d8Twb_register:
2488 case ARM::VST1d16Twb_register:
2489 case ARM::VST1d32Twb_register:
2490 case ARM::VST1d64Twb_register:
2491 case ARM::VST1d8Qwb_fixed:
2492 case ARM::VST1d16Qwb_fixed:
2493 case ARM::VST1d32Qwb_fixed:
2494 case ARM::VST1d64Qwb_fixed:
2495 case ARM::VST1d8Qwb_register:
2496 case ARM::VST1d16Qwb_register:
2497 case ARM::VST1d32Qwb_register:
2498 case ARM::VST1d64Qwb_register:
2499 case ARM::VST2d8wb_fixed:
2500 case ARM::VST2d16wb_fixed:
2501 case ARM::VST2d32wb_fixed:
2502 case ARM::VST2d8wb_register:
2503 case ARM::VST2d16wb_register:
2504 case ARM::VST2d32wb_register:
2505 case ARM::VST2q8wb_fixed:
2506 case ARM::VST2q16wb_fixed:
2507 case ARM::VST2q32wb_fixed:
2508 case ARM::VST2q8wb_register:
2509 case ARM::VST2q16wb_register:
2510 case ARM::VST2q32wb_register:
2511 case ARM::VST2b8wb_fixed:
2512 case ARM::VST2b16wb_fixed:
2513 case ARM::VST2b32wb_fixed:
2514 case ARM::VST2b8wb_register:
2515 case ARM::VST2b16wb_register:
2516 case ARM::VST2b32wb_register:
2518 return MCDisassembler::Fail;
2519 Inst.addOperand(MCOperand::CreateImm(0));
2521 case ARM::VST3d8_UPD:
2522 case ARM::VST3d16_UPD:
2523 case ARM::VST3d32_UPD:
2524 case ARM::VST3q8_UPD:
2525 case ARM::VST3q16_UPD:
2526 case ARM::VST3q32_UPD:
2527 case ARM::VST4d8_UPD:
2528 case ARM::VST4d16_UPD:
2529 case ARM::VST4d32_UPD:
2530 case ARM::VST4q8_UPD:
2531 case ARM::VST4q16_UPD:
2532 case ARM::VST4q32_UPD:
2533 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2534 return MCDisassembler::Fail;
2540 // AddrMode6 Base (register+alignment)
2541 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2542 return MCDisassembler::Fail;
2544 // AddrMode6 Offset (register)
2545 switch (Inst.getOpcode()) {
2548 Inst.addOperand(MCOperand::CreateReg(0));
2549 else if (Rm != 0xF) {
2550 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2551 return MCDisassembler::Fail;
2554 case ARM::VST1d8wb_fixed:
2555 case ARM::VST1d16wb_fixed:
2556 case ARM::VST1d32wb_fixed:
2557 case ARM::VST1d64wb_fixed:
2558 case ARM::VST1q8wb_fixed:
2559 case ARM::VST1q16wb_fixed:
2560 case ARM::VST1q32wb_fixed:
2561 case ARM::VST1q64wb_fixed:
2562 case ARM::VST1d8Twb_fixed:
2563 case ARM::VST1d16Twb_fixed:
2564 case ARM::VST1d32Twb_fixed:
2565 case ARM::VST1d64Twb_fixed:
2566 case ARM::VST1d8Qwb_fixed:
2567 case ARM::VST1d16Qwb_fixed:
2568 case ARM::VST1d32Qwb_fixed:
2569 case ARM::VST1d64Qwb_fixed:
2570 case ARM::VST2d8wb_fixed:
2571 case ARM::VST2d16wb_fixed:
2572 case ARM::VST2d32wb_fixed:
2573 case ARM::VST2q8wb_fixed:
2574 case ARM::VST2q16wb_fixed:
2575 case ARM::VST2q32wb_fixed:
2576 case ARM::VST2b8wb_fixed:
2577 case ARM::VST2b16wb_fixed:
2578 case ARM::VST2b32wb_fixed:
2583 // First input register
2584 switch (Inst.getOpcode()) {
2589 case ARM::VST1q16wb_fixed:
2590 case ARM::VST1q16wb_register:
2591 case ARM::VST1q32wb_fixed:
2592 case ARM::VST1q32wb_register:
2593 case ARM::VST1q64wb_fixed:
2594 case ARM::VST1q64wb_register:
2595 case ARM::VST1q8wb_fixed:
2596 case ARM::VST1q8wb_register:
2600 case ARM::VST2d16wb_fixed:
2601 case ARM::VST2d16wb_register:
2602 case ARM::VST2d32wb_fixed:
2603 case ARM::VST2d32wb_register:
2604 case ARM::VST2d8wb_fixed:
2605 case ARM::VST2d8wb_register:
2606 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2607 return MCDisassembler::Fail;
2612 case ARM::VST2b16wb_fixed:
2613 case ARM::VST2b16wb_register:
2614 case ARM::VST2b32wb_fixed:
2615 case ARM::VST2b32wb_register:
2616 case ARM::VST2b8wb_fixed:
2617 case ARM::VST2b8wb_register:
2618 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2619 return MCDisassembler::Fail;
2622 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2623 return MCDisassembler::Fail;
2626 // Second input register
2627 switch (Inst.getOpcode()) {
2631 case ARM::VST3d8_UPD:
2632 case ARM::VST3d16_UPD:
2633 case ARM::VST3d32_UPD:
2637 case ARM::VST4d8_UPD:
2638 case ARM::VST4d16_UPD:
2639 case ARM::VST4d32_UPD:
2640 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2641 return MCDisassembler::Fail;
2646 case ARM::VST3q8_UPD:
2647 case ARM::VST3q16_UPD:
2648 case ARM::VST3q32_UPD:
2652 case ARM::VST4q8_UPD:
2653 case ARM::VST4q16_UPD:
2654 case ARM::VST4q32_UPD:
2655 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2656 return MCDisassembler::Fail;
2662 // Third input register
2663 switch (Inst.getOpcode()) {
2667 case ARM::VST3d8_UPD:
2668 case ARM::VST3d16_UPD:
2669 case ARM::VST3d32_UPD:
2673 case ARM::VST4d8_UPD:
2674 case ARM::VST4d16_UPD:
2675 case ARM::VST4d32_UPD:
2676 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2677 return MCDisassembler::Fail;
2682 case ARM::VST3q8_UPD:
2683 case ARM::VST3q16_UPD:
2684 case ARM::VST3q32_UPD:
2688 case ARM::VST4q8_UPD:
2689 case ARM::VST4q16_UPD:
2690 case ARM::VST4q32_UPD:
2691 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2692 return MCDisassembler::Fail;
2698 // Fourth input register
2699 switch (Inst.getOpcode()) {
2703 case ARM::VST4d8_UPD:
2704 case ARM::VST4d16_UPD:
2705 case ARM::VST4d32_UPD:
2706 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2707 return MCDisassembler::Fail;
2712 case ARM::VST4q8_UPD:
2713 case ARM::VST4q16_UPD:
2714 case ARM::VST4q32_UPD:
2715 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2716 return MCDisassembler::Fail;
2725 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Insn,
2726 uint64_t Address, const void *Decoder) {
2727 DecodeStatus S = MCDisassembler::Success;
2729 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2730 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2731 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2732 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2733 unsigned align = fieldFromInstruction(Insn, 4, 1);
2734 unsigned size = fieldFromInstruction(Insn, 6, 2);
2736 if (size == 0 && align == 1)
2737 return MCDisassembler::Fail;
2738 align *= (1 << size);
2740 switch (Inst.getOpcode()) {
2741 case ARM::VLD1DUPq16: case ARM::VLD1DUPq32: case ARM::VLD1DUPq8:
2742 case ARM::VLD1DUPq16wb_fixed: case ARM::VLD1DUPq16wb_register:
2743 case ARM::VLD1DUPq32wb_fixed: case ARM::VLD1DUPq32wb_register:
2744 case ARM::VLD1DUPq8wb_fixed: case ARM::VLD1DUPq8wb_register:
2745 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2746 return MCDisassembler::Fail;
2749 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2750 return MCDisassembler::Fail;
2754 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2755 return MCDisassembler::Fail;
2758 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2759 return MCDisassembler::Fail;
2760 Inst.addOperand(MCOperand::CreateImm(align));
2762 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2763 // variant encodes Rm == 0xf. Anything else is a register offset post-
2764 // increment and we need to add the register operand to the instruction.
2765 if (Rm != 0xD && Rm != 0xF &&
2766 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2767 return MCDisassembler::Fail;
2772 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Insn,
2773 uint64_t Address, const void *Decoder) {
2774 DecodeStatus S = MCDisassembler::Success;
2776 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2777 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2778 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2779 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2780 unsigned align = fieldFromInstruction(Insn, 4, 1);
2781 unsigned size = 1 << fieldFromInstruction(Insn, 6, 2);
2784 switch (Inst.getOpcode()) {
2785 case ARM::VLD2DUPd16: case ARM::VLD2DUPd32: case ARM::VLD2DUPd8:
2786 case ARM::VLD2DUPd16wb_fixed: case ARM::VLD2DUPd16wb_register:
2787 case ARM::VLD2DUPd32wb_fixed: case ARM::VLD2DUPd32wb_register:
2788 case ARM::VLD2DUPd8wb_fixed: case ARM::VLD2DUPd8wb_register:
2789 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2790 return MCDisassembler::Fail;
2792 case ARM::VLD2DUPd16x2: case ARM::VLD2DUPd32x2: case ARM::VLD2DUPd8x2:
2793 case ARM::VLD2DUPd16x2wb_fixed: case ARM::VLD2DUPd16x2wb_register:
2794 case ARM::VLD2DUPd32x2wb_fixed: case ARM::VLD2DUPd32x2wb_register:
2795 case ARM::VLD2DUPd8x2wb_fixed: case ARM::VLD2DUPd8x2wb_register:
2796 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2797 return MCDisassembler::Fail;
2800 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2801 return MCDisassembler::Fail;
2806 Inst.addOperand(MCOperand::CreateImm(0));
2808 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2809 return MCDisassembler::Fail;
2810 Inst.addOperand(MCOperand::CreateImm(align));
2812 if (Rm != 0xD && Rm != 0xF) {
2813 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2814 return MCDisassembler::Fail;
2820 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Insn,
2821 uint64_t Address, const void *Decoder) {
2822 DecodeStatus S = MCDisassembler::Success;
2824 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2825 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2826 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2827 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2828 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
2830 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2831 return MCDisassembler::Fail;
2832 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2833 return MCDisassembler::Fail;
2834 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2835 return MCDisassembler::Fail;
2837 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2838 return MCDisassembler::Fail;
2841 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2842 return MCDisassembler::Fail;
2843 Inst.addOperand(MCOperand::CreateImm(0));
2846 Inst.addOperand(MCOperand::CreateReg(0));
2847 else if (Rm != 0xF) {
2848 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2849 return MCDisassembler::Fail;
2855 static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Insn,
2856 uint64_t Address, const void *Decoder) {
2857 DecodeStatus S = MCDisassembler::Success;
2859 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2860 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2861 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2862 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2863 unsigned size = fieldFromInstruction(Insn, 6, 2);
2864 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
2865 unsigned align = fieldFromInstruction(Insn, 4, 1);
2869 return MCDisassembler::Fail;
2882 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2883 return MCDisassembler::Fail;
2884 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2885 return MCDisassembler::Fail;
2886 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2887 return MCDisassembler::Fail;
2888 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
2889 return MCDisassembler::Fail;
2891 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2892 return MCDisassembler::Fail;
2895 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2896 return MCDisassembler::Fail;
2897 Inst.addOperand(MCOperand::CreateImm(align));
2900 Inst.addOperand(MCOperand::CreateReg(0));
2901 else if (Rm != 0xF) {
2902 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2903 return MCDisassembler::Fail;
2910 DecodeNEONModImmInstruction(MCInst &Inst, unsigned Insn,
2911 uint64_t Address, const void *Decoder) {
2912 DecodeStatus S = MCDisassembler::Success;
2914 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2915 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2916 unsigned imm = fieldFromInstruction(Insn, 0, 4);
2917 imm |= fieldFromInstruction(Insn, 16, 3) << 4;
2918 imm |= fieldFromInstruction(Insn, 24, 1) << 7;
2919 imm |= fieldFromInstruction(Insn, 8, 4) << 8;
2920 imm |= fieldFromInstruction(Insn, 5, 1) << 12;
2921 unsigned Q = fieldFromInstruction(Insn, 6, 1);
2924 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2925 return MCDisassembler::Fail;
2927 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2928 return MCDisassembler::Fail;
2931 Inst.addOperand(MCOperand::CreateImm(imm));
2933 switch (Inst.getOpcode()) {
2934 case ARM::VORRiv4i16:
2935 case ARM::VORRiv2i32:
2936 case ARM::VBICiv4i16:
2937 case ARM::VBICiv2i32:
2938 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2939 return MCDisassembler::Fail;
2941 case ARM::VORRiv8i16:
2942 case ARM::VORRiv4i32:
2943 case ARM::VBICiv8i16:
2944 case ARM::VBICiv4i32:
2945 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2946 return MCDisassembler::Fail;
2955 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Insn,
2956 uint64_t Address, const void *Decoder) {
2957 DecodeStatus S = MCDisassembler::Success;
2959 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2960 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2961 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2962 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
2963 unsigned size = fieldFromInstruction(Insn, 18, 2);
2965 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2966 return MCDisassembler::Fail;
2967 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2968 return MCDisassembler::Fail;
2969 Inst.addOperand(MCOperand::CreateImm(8 << size));
2974 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
2975 uint64_t Address, const void *Decoder) {
2976 Inst.addOperand(MCOperand::CreateImm(8 - Val));
2977 return MCDisassembler::Success;
2980 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
2981 uint64_t Address, const void *Decoder) {
2982 Inst.addOperand(MCOperand::CreateImm(16 - Val));
2983 return MCDisassembler::Success;
2986 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
2987 uint64_t Address, const void *Decoder) {
2988 Inst.addOperand(MCOperand::CreateImm(32 - Val));
2989 return MCDisassembler::Success;
2992 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
2993 uint64_t Address, const void *Decoder) {
2994 Inst.addOperand(MCOperand::CreateImm(64 - Val));
2995 return MCDisassembler::Success;
2998 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
2999 uint64_t Address, const void *Decoder) {
3000 DecodeStatus S = MCDisassembler::Success;
3002 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3003 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3004 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3005 Rn |= fieldFromInstruction(Insn, 7, 1) << 4;
3006 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3007 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
3008 unsigned op = fieldFromInstruction(Insn, 6, 1);
3010 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3011 return MCDisassembler::Fail;
3013 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3014 return MCDisassembler::Fail; // Writeback
3017 switch (Inst.getOpcode()) {
3020 if (!Check(S, DecodeDPairRegisterClass(Inst, Rn, Address, Decoder)))
3021 return MCDisassembler::Fail;
3024 if (!Check(S, DecodeDPRRegisterClass(Inst, Rn, Address, Decoder)))
3025 return MCDisassembler::Fail;
3028 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
3029 return MCDisassembler::Fail;
3034 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
3035 uint64_t Address, const void *Decoder) {
3036 DecodeStatus S = MCDisassembler::Success;
3038 unsigned dst = fieldFromInstruction(Insn, 8, 3);
3039 unsigned imm = fieldFromInstruction(Insn, 0, 8);
3041 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
3042 return MCDisassembler::Fail;
3044 switch(Inst.getOpcode()) {
3046 return MCDisassembler::Fail;
3048 break; // tADR does not explicitly represent the PC as an operand.
3050 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3054 Inst.addOperand(MCOperand::CreateImm(imm));
3058 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
3059 uint64_t Address, const void *Decoder) {
3060 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<12>(Val<<1) + 4,
3061 true, 2, Inst, Decoder))
3062 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
3063 return MCDisassembler::Success;
3066 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
3067 uint64_t Address, const void *Decoder) {
3068 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<21>(Val) + 4,
3069 true, 4, Inst, Decoder))
3070 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
3071 return MCDisassembler::Success;
3074 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
3075 uint64_t Address, const void *Decoder) {
3076 if (!tryAddingSymbolicOperand(Address, Address + (Val<<1) + 4,
3077 true, 2, Inst, Decoder))
3078 Inst.addOperand(MCOperand::CreateImm(Val << 1));
3079 return MCDisassembler::Success;
3082 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
3083 uint64_t Address, const void *Decoder) {
3084 DecodeStatus S = MCDisassembler::Success;
3086 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3087 unsigned Rm = fieldFromInstruction(Val, 3, 3);
3089 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3090 return MCDisassembler::Fail;
3091 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
3092 return MCDisassembler::Fail;
3097 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
3098 uint64_t Address, const void *Decoder) {
3099 DecodeStatus S = MCDisassembler::Success;
3101 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3102 unsigned imm = fieldFromInstruction(Val, 3, 5);
3104 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3105 return MCDisassembler::Fail;
3106 Inst.addOperand(MCOperand::CreateImm(imm));
3111 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
3112 uint64_t Address, const void *Decoder) {
3113 unsigned imm = Val << 2;
3115 Inst.addOperand(MCOperand::CreateImm(imm));
3116 tryAddingPcLoadReferenceComment(Address, (Address & ~2u) + imm + 4, Decoder);
3118 return MCDisassembler::Success;
3121 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
3122 uint64_t Address, const void *Decoder) {
3123 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3124 Inst.addOperand(MCOperand::CreateImm(Val));
3126 return MCDisassembler::Success;
3129 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
3130 uint64_t Address, const void *Decoder) {
3131 DecodeStatus S = MCDisassembler::Success;
3133 unsigned Rn = fieldFromInstruction(Val, 6, 4);
3134 unsigned Rm = fieldFromInstruction(Val, 2, 4);
3135 unsigned imm = fieldFromInstruction(Val, 0, 2);
3137 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3138 return MCDisassembler::Fail;
3139 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3140 return MCDisassembler::Fail;
3141 Inst.addOperand(MCOperand::CreateImm(imm));
3146 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Insn,
3147 uint64_t Address, const void *Decoder) {
3148 DecodeStatus S = MCDisassembler::Success;
3150 switch (Inst.getOpcode()) {
3156 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3157 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3158 return MCDisassembler::Fail;
3162 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3164 switch (Inst.getOpcode()) {
3166 Inst.setOpcode(ARM::t2LDRBpci);
3169 Inst.setOpcode(ARM::t2LDRHpci);
3172 Inst.setOpcode(ARM::t2LDRSHpci);
3175 Inst.setOpcode(ARM::t2LDRSBpci);
3178 Inst.setOpcode(ARM::t2PLDi12);
3179 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
3182 return MCDisassembler::Fail;
3185 int imm = fieldFromInstruction(Insn, 0, 12);
3186 if (!fieldFromInstruction(Insn, 23, 1)) imm *= -1;
3187 Inst.addOperand(MCOperand::CreateImm(imm));
3192 unsigned addrmode = fieldFromInstruction(Insn, 4, 2);
3193 addrmode |= fieldFromInstruction(Insn, 0, 4) << 2;
3194 addrmode |= fieldFromInstruction(Insn, 16, 4) << 6;
3195 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
3196 return MCDisassembler::Fail;
3201 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
3202 uint64_t Address, const void *Decoder) {
3204 Inst.addOperand(MCOperand::CreateImm(INT32_MIN));
3206 int imm = Val & 0xFF;
3208 if (!(Val & 0x100)) imm *= -1;
3209 Inst.addOperand(MCOperand::CreateImm(imm * 4));
3212 return MCDisassembler::Success;
3215 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
3216 uint64_t Address, const void *Decoder) {
3217 DecodeStatus S = MCDisassembler::Success;
3219 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3220 unsigned imm = fieldFromInstruction(Val, 0, 9);
3222 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3223 return MCDisassembler::Fail;
3224 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
3225 return MCDisassembler::Fail;
3230 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
3231 uint64_t Address, const void *Decoder) {
3232 DecodeStatus S = MCDisassembler::Success;
3234 unsigned Rn = fieldFromInstruction(Val, 8, 4);
3235 unsigned imm = fieldFromInstruction(Val, 0, 8);
3237 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
3238 return MCDisassembler::Fail;
3240 Inst.addOperand(MCOperand::CreateImm(imm));
3245 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
3246 uint64_t Address, const void *Decoder) {
3247 int imm = Val & 0xFF;
3250 else if (!(Val & 0x100))
3252 Inst.addOperand(MCOperand::CreateImm(imm));
3254 return MCDisassembler::Success;
3258 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
3259 uint64_t Address, const void *Decoder) {
3260 DecodeStatus S = MCDisassembler::Success;
3262 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3263 unsigned imm = fieldFromInstruction(Val, 0, 9);
3265 // Some instructions always use an additive offset.
3266 switch (Inst.getOpcode()) {
3281 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3282 return MCDisassembler::Fail;
3283 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
3284 return MCDisassembler::Fail;
3289 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Insn,
3290 uint64_t Address, const void *Decoder) {
3291 DecodeStatus S = MCDisassembler::Success;
3293 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3294 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3295 unsigned addr = fieldFromInstruction(Insn, 0, 8);
3296 addr |= fieldFromInstruction(Insn, 9, 1) << 8;
3298 unsigned load = fieldFromInstruction(Insn, 20, 1);
3301 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3302 return MCDisassembler::Fail;
3305 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3306 return MCDisassembler::Fail;
3309 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3310 return MCDisassembler::Fail;
3313 if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
3314 return MCDisassembler::Fail;
3319 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
3320 uint64_t Address, const void *Decoder) {
3321 DecodeStatus S = MCDisassembler::Success;
3323 unsigned Rn = fieldFromInstruction(Val, 13, 4);
3324 unsigned imm = fieldFromInstruction(Val, 0, 12);
3326 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3327 return MCDisassembler::Fail;
3328 Inst.addOperand(MCOperand::CreateImm(imm));
3334 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Insn,
3335 uint64_t Address, const void *Decoder) {
3336 unsigned imm = fieldFromInstruction(Insn, 0, 7);
3338 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3339 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3340 Inst.addOperand(MCOperand::CreateImm(imm));
3342 return MCDisassembler::Success;
3345 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
3346 uint64_t Address, const void *Decoder) {
3347 DecodeStatus S = MCDisassembler::Success;
3349 if (Inst.getOpcode() == ARM::tADDrSP) {
3350 unsigned Rdm = fieldFromInstruction(Insn, 0, 3);
3351 Rdm |= fieldFromInstruction(Insn, 7, 1) << 3;
3353 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3354 return MCDisassembler::Fail;
3355 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3356 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3357 return MCDisassembler::Fail;
3358 } else if (Inst.getOpcode() == ARM::tADDspr) {
3359 unsigned Rm = fieldFromInstruction(Insn, 3, 4);
3361 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3362 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3363 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3364 return MCDisassembler::Fail;
3370 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
3371 uint64_t Address, const void *Decoder) {
3372 unsigned imod = fieldFromInstruction(Insn, 4, 1) | 0x2;
3373 unsigned flags = fieldFromInstruction(Insn, 0, 3);
3375 Inst.addOperand(MCOperand::CreateImm(imod));
3376 Inst.addOperand(MCOperand::CreateImm(flags));
3378 return MCDisassembler::Success;
3381 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
3382 uint64_t Address, const void *Decoder) {
3383 DecodeStatus S = MCDisassembler::Success;
3384 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3385 unsigned add = fieldFromInstruction(Insn, 4, 1);
3387 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
3388 return MCDisassembler::Fail;
3389 Inst.addOperand(MCOperand::CreateImm(add));
3394 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Val,
3395 uint64_t Address, const void *Decoder) {
3396 // Val is passed in as S:J1:J2:imm10H:imm10L:'0'
3397 // Note only one trailing zero not two. Also the J1 and J2 values are from
3398 // the encoded instruction. So here change to I1 and I2 values via:
3399 // I1 = NOT(J1 EOR S);
3400 // I2 = NOT(J2 EOR S);
3401 // and build the imm32 with two trailing zeros as documented:
3402 // imm32 = SignExtend(S:I1:I2:imm10H:imm10L:'00', 32);
3403 unsigned S = (Val >> 23) & 1;
3404 unsigned J1 = (Val >> 22) & 1;
3405 unsigned J2 = (Val >> 21) & 1;
3406 unsigned I1 = !(J1 ^ S);
3407 unsigned I2 = !(J2 ^ S);
3408 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
3409 int imm32 = SignExtend32<25>(tmp << 1);
3411 if (!tryAddingSymbolicOperand(Address,
3412 (Address & ~2u) + imm32 + 4,
3413 true, 4, Inst, Decoder))
3414 Inst.addOperand(MCOperand::CreateImm(imm32));
3415 return MCDisassembler::Success;
3418 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Val,
3419 uint64_t Address, const void *Decoder) {
3420 if (Val == 0xA || Val == 0xB)
3421 return MCDisassembler::Fail;
3423 Inst.addOperand(MCOperand::CreateImm(Val));
3424 return MCDisassembler::Success;
3428 DecodeThumbTableBranch(MCInst &Inst, unsigned Insn,
3429 uint64_t Address, const void *Decoder) {
3430 DecodeStatus S = MCDisassembler::Success;
3432 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3433 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3435 if (Rn == ARM::SP) S = MCDisassembler::SoftFail;
3436 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3437 return MCDisassembler::Fail;
3438 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3439 return MCDisassembler::Fail;
3444 DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Insn,
3445 uint64_t Address, const void *Decoder) {
3446 DecodeStatus S = MCDisassembler::Success;
3448 unsigned pred = fieldFromInstruction(Insn, 22, 4);
3449 if (pred == 0xE || pred == 0xF) {
3450 unsigned opc = fieldFromInstruction(Insn, 4, 28);
3453 return MCDisassembler::Fail;
3455 Inst.setOpcode(ARM::t2DSB);
3458 Inst.setOpcode(ARM::t2DMB);
3461 Inst.setOpcode(ARM::t2ISB);
3465 unsigned imm = fieldFromInstruction(Insn, 0, 4);
3466 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
3469 unsigned brtarget = fieldFromInstruction(Insn, 0, 11) << 1;
3470 brtarget |= fieldFromInstruction(Insn, 11, 1) << 19;
3471 brtarget |= fieldFromInstruction(Insn, 13, 1) << 18;
3472 brtarget |= fieldFromInstruction(Insn, 16, 6) << 12;
3473 brtarget |= fieldFromInstruction(Insn, 26, 1) << 20;
3475 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
3476 return MCDisassembler::Fail;
3477 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3478 return MCDisassembler::Fail;
3483 // Decode a shifted immediate operand. These basically consist
3484 // of an 8-bit value, and a 4-bit directive that specifies either
3485 // a splat operation or a rotation.
3486 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
3487 uint64_t Address, const void *Decoder) {
3488 unsigned ctrl = fieldFromInstruction(Val, 10, 2);
3490 unsigned byte = fieldFromInstruction(Val, 8, 2);
3491 unsigned imm = fieldFromInstruction(Val, 0, 8);
3494 Inst.addOperand(MCOperand::CreateImm(imm));
3497 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
3500 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
3503 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
3508 unsigned unrot = fieldFromInstruction(Val, 0, 7) | 0x80;
3509 unsigned rot = fieldFromInstruction(Val, 7, 5);
3510 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
3511 Inst.addOperand(MCOperand::CreateImm(imm));
3514 return MCDisassembler::Success;
3518 DecodeThumbBCCTargetOperand(MCInst &Inst, unsigned Val,
3519 uint64_t Address, const void *Decoder){
3520 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<9>(Val<<1) + 4,
3521 true, 2, Inst, Decoder))
3522 Inst.addOperand(MCOperand::CreateImm(SignExtend32<9>(Val << 1)));
3523 return MCDisassembler::Success;
3526 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
3527 uint64_t Address, const void *Decoder){
3528 // Val is passed in as S:J1:J2:imm10:imm11
3529 // Note no trailing zero after imm11. Also the J1 and J2 values are from
3530 // the encoded instruction. So here change to I1 and I2 values via:
3531 // I1 = NOT(J1 EOR S);
3532 // I2 = NOT(J2 EOR S);
3533 // and build the imm32 with one trailing zero as documented:
3534 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
3535 unsigned S = (Val >> 23) & 1;
3536 unsigned J1 = (Val >> 22) & 1;
3537 unsigned J2 = (Val >> 21) & 1;
3538 unsigned I1 = !(J1 ^ S);
3539 unsigned I2 = !(J2 ^ S);
3540 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
3541 int imm32 = SignExtend32<25>(tmp << 1);
3543 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
3544 true, 4, Inst, Decoder))
3545 Inst.addOperand(MCOperand::CreateImm(imm32));
3546 return MCDisassembler::Success;
3549 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Val,
3550 uint64_t Address, const void *Decoder) {
3552 return MCDisassembler::Fail;
3554 Inst.addOperand(MCOperand::CreateImm(Val));
3555 return MCDisassembler::Success;
3558 static DecodeStatus DecodeInstSyncBarrierOption(MCInst &Inst, unsigned Val,
3559 uint64_t Address, const void *Decoder) {
3561 return MCDisassembler::Fail;
3563 Inst.addOperand(MCOperand::CreateImm(Val));
3564 return MCDisassembler::Success;
3567 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Val,
3568 uint64_t Address, const void *Decoder) {
3569 if (!Val) return MCDisassembler::Fail;
3570 Inst.addOperand(MCOperand::CreateImm(Val));
3571 return MCDisassembler::Success;
3574 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
3575 uint64_t Address, const void *Decoder) {
3576 DecodeStatus S = MCDisassembler::Success;
3578 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3579 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3580 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3582 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3584 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3585 return MCDisassembler::Fail;
3586 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3587 return MCDisassembler::Fail;
3588 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3589 return MCDisassembler::Fail;
3590 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3591 return MCDisassembler::Fail;
3597 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
3598 uint64_t Address, const void *Decoder){
3599 DecodeStatus S = MCDisassembler::Success;
3601 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3602 unsigned Rt = fieldFromInstruction(Insn, 0, 4);
3603 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3604 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3606 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
3607 return MCDisassembler::Fail;
3609 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
3610 if (Rd == Rn || Rd == Rt || Rd == Rt+1) return MCDisassembler::Fail;
3612 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3613 return MCDisassembler::Fail;
3614 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
3615 return MCDisassembler::Fail;
3616 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3617 return MCDisassembler::Fail;
3618 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3619 return MCDisassembler::Fail;
3624 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
3625 uint64_t Address, const void *Decoder) {
3626 DecodeStatus S = MCDisassembler::Success;
3628 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3629 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3630 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3631 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3632 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3633 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3635 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3637 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3638 return MCDisassembler::Fail;
3639 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3640 return MCDisassembler::Fail;
3641 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3642 return MCDisassembler::Fail;
3643 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3644 return MCDisassembler::Fail;
3649 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
3650 uint64_t Address, const void *Decoder) {
3651 DecodeStatus S = MCDisassembler::Success;
3653 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3654 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3655 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3656 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3657 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3658 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3659 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3661 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3662 if (Rm == 0xF) S = MCDisassembler::SoftFail;
3664 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3665 return MCDisassembler::Fail;
3666 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3667 return MCDisassembler::Fail;
3668 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3669 return MCDisassembler::Fail;
3670 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3671 return MCDisassembler::Fail;
3677 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
3678 uint64_t Address, const void *Decoder) {
3679 DecodeStatus S = MCDisassembler::Success;
3681 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3682 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3683 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3684 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3685 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3686 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3688 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3690 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3691 return MCDisassembler::Fail;
3692 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3693 return MCDisassembler::Fail;
3694 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3695 return MCDisassembler::Fail;
3696 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3697 return MCDisassembler::Fail;
3702 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
3703 uint64_t Address, const void *Decoder) {
3704 DecodeStatus S = MCDisassembler::Success;
3706 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3707 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3708 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3709 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3710 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3711 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3713 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3715 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3716 return MCDisassembler::Fail;
3717 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3718 return MCDisassembler::Fail;
3719 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3720 return MCDisassembler::Fail;
3721 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3722 return MCDisassembler::Fail;
3727 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
3728 uint64_t Address, const void *Decoder) {
3729 DecodeStatus S = MCDisassembler::Success;
3731 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3732 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3733 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3734 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3735 unsigned size = fieldFromInstruction(Insn, 10, 2);
3741 return MCDisassembler::Fail;
3743 if (fieldFromInstruction(Insn, 4, 1))
3744 return MCDisassembler::Fail; // UNDEFINED
3745 index = fieldFromInstruction(Insn, 5, 3);
3748 if (fieldFromInstruction(Insn, 5, 1))
3749 return MCDisassembler::Fail; // UNDEFINED
3750 index = fieldFromInstruction(Insn, 6, 2);
3751 if (fieldFromInstruction(Insn, 4, 1))
3755 if (fieldFromInstruction(Insn, 6, 1))
3756 return MCDisassembler::Fail; // UNDEFINED
3757 index = fieldFromInstruction(Insn, 7, 1);
3759 switch (fieldFromInstruction(Insn, 4, 2)) {
3765 return MCDisassembler::Fail;
3770 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3771 return MCDisassembler::Fail;
3772 if (Rm != 0xF) { // Writeback
3773 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3774 return MCDisassembler::Fail;
3776 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3777 return MCDisassembler::Fail;
3778 Inst.addOperand(MCOperand::CreateImm(align));
3781 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3782 return MCDisassembler::Fail;
3784 Inst.addOperand(MCOperand::CreateReg(0));
3787 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3788 return MCDisassembler::Fail;
3789 Inst.addOperand(MCOperand::CreateImm(index));
3794 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
3795 uint64_t Address, const void *Decoder) {
3796 DecodeStatus S = MCDisassembler::Success;
3798 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3799 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3800 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3801 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3802 unsigned size = fieldFromInstruction(Insn, 10, 2);
3808 return MCDisassembler::Fail;
3810 if (fieldFromInstruction(Insn, 4, 1))
3811 return MCDisassembler::Fail; // UNDEFINED
3812 index = fieldFromInstruction(Insn, 5, 3);
3815 if (fieldFromInstruction(Insn, 5, 1))
3816 return MCDisassembler::Fail; // UNDEFINED
3817 index = fieldFromInstruction(Insn, 6, 2);
3818 if (fieldFromInstruction(Insn, 4, 1))
3822 if (fieldFromInstruction(Insn, 6, 1))
3823 return MCDisassembler::Fail; // UNDEFINED
3824 index = fieldFromInstruction(Insn, 7, 1);
3826 switch (fieldFromInstruction(Insn, 4, 2)) {
3832 return MCDisassembler::Fail;
3837 if (Rm != 0xF) { // Writeback
3838 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3839 return MCDisassembler::Fail;
3841 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3842 return MCDisassembler::Fail;
3843 Inst.addOperand(MCOperand::CreateImm(align));
3846 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3847 return MCDisassembler::Fail;
3849 Inst.addOperand(MCOperand::CreateReg(0));
3852 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3853 return MCDisassembler::Fail;
3854 Inst.addOperand(MCOperand::CreateImm(index));
3860 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
3861 uint64_t Address, const void *Decoder) {
3862 DecodeStatus S = MCDisassembler::Success;
3864 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3865 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3866 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3867 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3868 unsigned size = fieldFromInstruction(Insn, 10, 2);
3875 return MCDisassembler::Fail;
3877 index = fieldFromInstruction(Insn, 5, 3);
3878 if (fieldFromInstruction(Insn, 4, 1))
3882 index = fieldFromInstruction(Insn, 6, 2);
3883 if (fieldFromInstruction(Insn, 4, 1))
3885 if (fieldFromInstruction(Insn, 5, 1))
3889 if (fieldFromInstruction(Insn, 5, 1))
3890 return MCDisassembler::Fail; // UNDEFINED
3891 index = fieldFromInstruction(Insn, 7, 1);
3892 if (fieldFromInstruction(Insn, 4, 1) != 0)
3894 if (fieldFromInstruction(Insn, 6, 1))
3899 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3900 return MCDisassembler::Fail;
3901 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3902 return MCDisassembler::Fail;
3903 if (Rm != 0xF) { // Writeback
3904 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3905 return MCDisassembler::Fail;
3907 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3908 return MCDisassembler::Fail;
3909 Inst.addOperand(MCOperand::CreateImm(align));
3912 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3913 return MCDisassembler::Fail;
3915 Inst.addOperand(MCOperand::CreateReg(0));
3918 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3919 return MCDisassembler::Fail;
3920 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3921 return MCDisassembler::Fail;
3922 Inst.addOperand(MCOperand::CreateImm(index));
3927 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
3928 uint64_t Address, const void *Decoder) {
3929 DecodeStatus S = MCDisassembler::Success;
3931 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3932 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3933 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3934 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3935 unsigned size = fieldFromInstruction(Insn, 10, 2);
3942 return MCDisassembler::Fail;
3944 index = fieldFromInstruction(Insn, 5, 3);
3945 if (fieldFromInstruction(Insn, 4, 1))
3949 index = fieldFromInstruction(Insn, 6, 2);
3950 if (fieldFromInstruction(Insn, 4, 1))
3952 if (fieldFromInstruction(Insn, 5, 1))
3956 if (fieldFromInstruction(Insn, 5, 1))
3957 return MCDisassembler::Fail; // UNDEFINED
3958 index = fieldFromInstruction(Insn, 7, 1);
3959 if (fieldFromInstruction(Insn, 4, 1) != 0)
3961 if (fieldFromInstruction(Insn, 6, 1))
3966 if (Rm != 0xF) { // Writeback
3967 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3968 return MCDisassembler::Fail;
3970 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3971 return MCDisassembler::Fail;
3972 Inst.addOperand(MCOperand::CreateImm(align));
3975 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3976 return MCDisassembler::Fail;
3978 Inst.addOperand(MCOperand::CreateReg(0));
3981 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3982 return MCDisassembler::Fail;
3983 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3984 return MCDisassembler::Fail;
3985 Inst.addOperand(MCOperand::CreateImm(index));
3991 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
3992 uint64_t Address, const void *Decoder) {
3993 DecodeStatus S = MCDisassembler::Success;
3995 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3996 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3997 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3998 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3999 unsigned size = fieldFromInstruction(Insn, 10, 2);
4006 return MCDisassembler::Fail;
4008 if (fieldFromInstruction(Insn, 4, 1))
4009 return MCDisassembler::Fail; // UNDEFINED
4010 index = fieldFromInstruction(Insn, 5, 3);
4013 if (fieldFromInstruction(Insn, 4, 1))
4014 return MCDisassembler::Fail; // UNDEFINED
4015 index = fieldFromInstruction(Insn, 6, 2);
4016 if (fieldFromInstruction(Insn, 5, 1))
4020 if (fieldFromInstruction(Insn, 4, 2))
4021 return MCDisassembler::Fail; // UNDEFINED
4022 index = fieldFromInstruction(Insn, 7, 1);
4023 if (fieldFromInstruction(Insn, 6, 1))
4028 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4029 return MCDisassembler::Fail;
4030 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4031 return MCDisassembler::Fail;
4032 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4033 return MCDisassembler::Fail;
4035 if (Rm != 0xF) { // Writeback
4036 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4037 return MCDisassembler::Fail;
4039 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4040 return MCDisassembler::Fail;
4041 Inst.addOperand(MCOperand::CreateImm(align));
4044 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4045 return MCDisassembler::Fail;
4047 Inst.addOperand(MCOperand::CreateReg(0));
4050 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4051 return MCDisassembler::Fail;
4052 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4053 return MCDisassembler::Fail;
4054 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4055 return MCDisassembler::Fail;
4056 Inst.addOperand(MCOperand::CreateImm(index));
4061 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
4062 uint64_t Address, const void *Decoder) {
4063 DecodeStatus S = MCDisassembler::Success;
4065 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4066 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4067 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4068 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4069 unsigned size = fieldFromInstruction(Insn, 10, 2);
4076 return MCDisassembler::Fail;
4078 if (fieldFromInstruction(Insn, 4, 1))
4079 return MCDisassembler::Fail; // UNDEFINED
4080 index = fieldFromInstruction(Insn, 5, 3);
4083 if (fieldFromInstruction(Insn, 4, 1))
4084 return MCDisassembler::Fail; // UNDEFINED
4085 index = fieldFromInstruction(Insn, 6, 2);
4086 if (fieldFromInstruction(Insn, 5, 1))
4090 if (fieldFromInstruction(Insn, 4, 2))
4091 return MCDisassembler::Fail; // UNDEFINED
4092 index = fieldFromInstruction(Insn, 7, 1);
4093 if (fieldFromInstruction(Insn, 6, 1))
4098 if (Rm != 0xF) { // Writeback
4099 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4100 return MCDisassembler::Fail;
4102 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4103 return MCDisassembler::Fail;
4104 Inst.addOperand(MCOperand::CreateImm(align));
4107 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4108 return MCDisassembler::Fail;
4110 Inst.addOperand(MCOperand::CreateReg(0));
4113 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4114 return MCDisassembler::Fail;
4115 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4116 return MCDisassembler::Fail;
4117 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4118 return MCDisassembler::Fail;
4119 Inst.addOperand(MCOperand::CreateImm(index));
4125 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
4126 uint64_t Address, const void *Decoder) {
4127 DecodeStatus S = MCDisassembler::Success;
4129 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4130 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4131 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4132 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4133 unsigned size = fieldFromInstruction(Insn, 10, 2);
4140 return MCDisassembler::Fail;
4142 if (fieldFromInstruction(Insn, 4, 1))
4144 index = fieldFromInstruction(Insn, 5, 3);
4147 if (fieldFromInstruction(Insn, 4, 1))
4149 index = fieldFromInstruction(Insn, 6, 2);
4150 if (fieldFromInstruction(Insn, 5, 1))
4154 switch (fieldFromInstruction(Insn, 4, 2)) {
4158 return MCDisassembler::Fail;
4160 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4163 index = fieldFromInstruction(Insn, 7, 1);
4164 if (fieldFromInstruction(Insn, 6, 1))
4169 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4170 return MCDisassembler::Fail;
4171 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4172 return MCDisassembler::Fail;
4173 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4174 return MCDisassembler::Fail;
4175 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4176 return MCDisassembler::Fail;
4178 if (Rm != 0xF) { // Writeback
4179 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4180 return MCDisassembler::Fail;
4182 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4183 return MCDisassembler::Fail;
4184 Inst.addOperand(MCOperand::CreateImm(align));
4187 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4188 return MCDisassembler::Fail;
4190 Inst.addOperand(MCOperand::CreateReg(0));
4193 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4194 return MCDisassembler::Fail;
4195 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4196 return MCDisassembler::Fail;
4197 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4198 return MCDisassembler::Fail;
4199 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4200 return MCDisassembler::Fail;
4201 Inst.addOperand(MCOperand::CreateImm(index));
4206 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
4207 uint64_t Address, const void *Decoder) {
4208 DecodeStatus S = MCDisassembler::Success;
4210 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4211 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4212 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4213 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4214 unsigned size = fieldFromInstruction(Insn, 10, 2);
4221 return MCDisassembler::Fail;
4223 if (fieldFromInstruction(Insn, 4, 1))
4225 index = fieldFromInstruction(Insn, 5, 3);
4228 if (fieldFromInstruction(Insn, 4, 1))
4230 index = fieldFromInstruction(Insn, 6, 2);
4231 if (fieldFromInstruction(Insn, 5, 1))
4235 switch (fieldFromInstruction(Insn, 4, 2)) {
4239 return MCDisassembler::Fail;
4241 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4244 index = fieldFromInstruction(Insn, 7, 1);
4245 if (fieldFromInstruction(Insn, 6, 1))
4250 if (Rm != 0xF) { // Writeback
4251 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4252 return MCDisassembler::Fail;
4254 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4255 return MCDisassembler::Fail;
4256 Inst.addOperand(MCOperand::CreateImm(align));
4259 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4260 return MCDisassembler::Fail;
4262 Inst.addOperand(MCOperand::CreateReg(0));
4265 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4266 return MCDisassembler::Fail;
4267 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4268 return MCDisassembler::Fail;
4269 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4270 return MCDisassembler::Fail;
4271 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4272 return MCDisassembler::Fail;
4273 Inst.addOperand(MCOperand::CreateImm(index));
4278 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
4279 uint64_t Address, const void *Decoder) {
4280 DecodeStatus S = MCDisassembler::Success;
4281 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4282 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4283 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4284 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4285 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4287 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4288 S = MCDisassembler::SoftFail;
4290 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4291 return MCDisassembler::Fail;
4292 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4293 return MCDisassembler::Fail;
4294 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4295 return MCDisassembler::Fail;
4296 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4297 return MCDisassembler::Fail;
4298 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4299 return MCDisassembler::Fail;
4304 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
4305 uint64_t Address, const void *Decoder) {
4306 DecodeStatus S = MCDisassembler::Success;
4307 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4308 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4309 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4310 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4311 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4313 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4314 S = MCDisassembler::SoftFail;
4316 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4317 return MCDisassembler::Fail;
4318 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4319 return MCDisassembler::Fail;
4320 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4321 return MCDisassembler::Fail;
4322 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4323 return MCDisassembler::Fail;
4324 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4325 return MCDisassembler::Fail;
4330 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Insn,
4331 uint64_t Address, const void *Decoder) {
4332 DecodeStatus S = MCDisassembler::Success;
4333 unsigned pred = fieldFromInstruction(Insn, 4, 4);
4334 unsigned mask = fieldFromInstruction(Insn, 0, 4);
4338 S = MCDisassembler::SoftFail;
4343 S = MCDisassembler::SoftFail;
4346 Inst.addOperand(MCOperand::CreateImm(pred));
4347 Inst.addOperand(MCOperand::CreateImm(mask));
4352 DecodeT2LDRDPreInstruction(MCInst &Inst, unsigned Insn,
4353 uint64_t Address, const void *Decoder) {
4354 DecodeStatus S = MCDisassembler::Success;
4356 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4357 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
4358 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4359 unsigned addr = fieldFromInstruction(Insn, 0, 8);
4360 unsigned W = fieldFromInstruction(Insn, 21, 1);
4361 unsigned U = fieldFromInstruction(Insn, 23, 1);
4362 unsigned P = fieldFromInstruction(Insn, 24, 1);
4363 bool writeback = (W == 1) | (P == 0);
4365 addr |= (U << 8) | (Rn << 9);
4367 if (writeback && (Rn == Rt || Rn == Rt2))
4368 Check(S, MCDisassembler::SoftFail);
4370 Check(S, MCDisassembler::SoftFail);
4373 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4374 return MCDisassembler::Fail;
4376 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4377 return MCDisassembler::Fail;
4378 // Writeback operand
4379 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4380 return MCDisassembler::Fail;
4382 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4383 return MCDisassembler::Fail;
4389 DecodeT2STRDPreInstruction(MCInst &Inst, unsigned Insn,
4390 uint64_t Address, const void *Decoder) {
4391 DecodeStatus S = MCDisassembler::Success;
4393 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4394 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
4395 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4396 unsigned addr = fieldFromInstruction(Insn, 0, 8);
4397 unsigned W = fieldFromInstruction(Insn, 21, 1);
4398 unsigned U = fieldFromInstruction(Insn, 23, 1);
4399 unsigned P = fieldFromInstruction(Insn, 24, 1);
4400 bool writeback = (W == 1) | (P == 0);
4402 addr |= (U << 8) | (Rn << 9);
4404 if (writeback && (Rn == Rt || Rn == Rt2))
4405 Check(S, MCDisassembler::SoftFail);
4407 // Writeback operand
4408 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4409 return MCDisassembler::Fail;
4411 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4412 return MCDisassembler::Fail;
4414 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4415 return MCDisassembler::Fail;
4417 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4418 return MCDisassembler::Fail;
4423 static DecodeStatus DecodeT2Adr(MCInst &Inst, uint32_t Insn,
4424 uint64_t Address, const void *Decoder) {
4425 unsigned sign1 = fieldFromInstruction(Insn, 21, 1);
4426 unsigned sign2 = fieldFromInstruction(Insn, 23, 1);
4427 if (sign1 != sign2) return MCDisassembler::Fail;
4429 unsigned Val = fieldFromInstruction(Insn, 0, 8);
4430 Val |= fieldFromInstruction(Insn, 12, 3) << 8;
4431 Val |= fieldFromInstruction(Insn, 26, 1) << 11;
4433 Inst.addOperand(MCOperand::CreateImm(SignExtend32<13>(Val)));
4435 return MCDisassembler::Success;
4438 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, uint32_t Val,
4440 const void *Decoder) {
4441 DecodeStatus S = MCDisassembler::Success;
4443 // Shift of "asr #32" is not allowed in Thumb2 mode.
4444 if (Val == 0x20) S = MCDisassembler::SoftFail;
4445 Inst.addOperand(MCOperand::CreateImm(Val));
4449 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
4450 uint64_t Address, const void *Decoder) {
4451 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4452 unsigned Rt2 = fieldFromInstruction(Insn, 0, 4);
4453 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4454 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4457 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
4459 DecodeStatus S = MCDisassembler::Success;
4461 if (Rt == Rn || Rn == Rt2)
4462 S = MCDisassembler::SoftFail;
4464 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4465 return MCDisassembler::Fail;
4466 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
4467 return MCDisassembler::Fail;
4468 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4469 return MCDisassembler::Fail;
4470 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4471 return MCDisassembler::Fail;
4476 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
4477 uint64_t Address, const void *Decoder) {
4478 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
4479 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
4480 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
4481 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
4482 unsigned imm = fieldFromInstruction(Insn, 16, 6);
4483 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
4484 unsigned op = fieldFromInstruction(Insn, 5, 1);
4486 DecodeStatus S = MCDisassembler::Success;
4488 // VMOVv2f32 is ambiguous with these decodings.
4489 if (!(imm & 0x38) && cmode == 0xF) {
4490 if (op == 1) return MCDisassembler::Fail;
4491 Inst.setOpcode(ARM::VMOVv2f32);
4492 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4495 if (!(imm & 0x20)) return MCDisassembler::Fail;
4497 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
4498 return MCDisassembler::Fail;
4499 if (!Check(S, DecodeDPRRegisterClass(Inst, Vm, Address, Decoder)))
4500 return MCDisassembler::Fail;
4501 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4506 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
4507 uint64_t Address, const void *Decoder) {
4508 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
4509 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
4510 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
4511 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
4512 unsigned imm = fieldFromInstruction(Insn, 16, 6);
4513 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
4514 unsigned op = fieldFromInstruction(Insn, 5, 1);
4516 DecodeStatus S = MCDisassembler::Success;
4518 // VMOVv4f32 is ambiguous with these decodings.
4519 if (!(imm & 0x38) && cmode == 0xF) {
4520 if (op == 1) return MCDisassembler::Fail;
4521 Inst.setOpcode(ARM::VMOVv4f32);
4522 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4525 if (!(imm & 0x20)) return MCDisassembler::Fail;
4527 if (!Check(S, DecodeQPRRegisterClass(Inst, Vd, Address, Decoder)))
4528 return MCDisassembler::Fail;
4529 if (!Check(S, DecodeQPRRegisterClass(Inst, Vm, Address, Decoder)))
4530 return MCDisassembler::Fail;
4531 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4536 static DecodeStatus DecodeImm0_4(MCInst &Inst, unsigned Insn, uint64_t Address,
4537 const void *Decoder)
4539 unsigned Imm = fieldFromInstruction(Insn, 0, 3);
4540 if (Imm > 4) return MCDisassembler::Fail;
4541 Inst.addOperand(MCOperand::CreateImm(Imm));
4542 return MCDisassembler::Success;
4545 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
4546 uint64_t Address, const void *Decoder) {
4547 DecodeStatus S = MCDisassembler::Success;
4549 unsigned Rn = fieldFromInstruction(Val, 16, 4);
4550 unsigned Rt = fieldFromInstruction(Val, 12, 4);
4551 unsigned Rm = fieldFromInstruction(Val, 0, 4);
4552 Rm |= (fieldFromInstruction(Val, 23, 1) << 4);
4553 unsigned Cond = fieldFromInstruction(Val, 28, 4);
4555 if (fieldFromInstruction(Val, 8, 4) != 0 || Rn == Rt)
4556 S = MCDisassembler::SoftFail;
4558 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4559 return MCDisassembler::Fail;
4560 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4561 return MCDisassembler::Fail;
4562 if (!Check(S, DecodeAddrMode7Operand(Inst, Rn, Address, Decoder)))
4563 return MCDisassembler::Fail;
4564 if (!Check(S, DecodePostIdxReg(Inst, Rm, Address, Decoder)))
4565 return MCDisassembler::Fail;
4566 if (!Check(S, DecodePredicateOperand(Inst, Cond, Address, Decoder)))
4567 return MCDisassembler::Fail;
4572 static DecodeStatus DecodeMRRC2(llvm::MCInst &Inst, unsigned Val,
4573 uint64_t Address, const void *Decoder) {
4575 DecodeStatus S = MCDisassembler::Success;
4577 unsigned CRm = fieldFromInstruction(Val, 0, 4);
4578 unsigned opc1 = fieldFromInstruction(Val, 4, 4);
4579 unsigned cop = fieldFromInstruction(Val, 8, 4);
4580 unsigned Rt = fieldFromInstruction(Val, 12, 4);
4581 unsigned Rt2 = fieldFromInstruction(Val, 16, 4);
4583 if ((cop & ~0x1) == 0xa)
4584 return MCDisassembler::Fail;
4587 S = MCDisassembler::SoftFail;
4589 Inst.addOperand(MCOperand::CreateImm(cop));
4590 Inst.addOperand(MCOperand::CreateImm(opc1));
4591 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4592 return MCDisassembler::Fail;
4593 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
4594 return MCDisassembler::Fail;
4595 Inst.addOperand(MCOperand::CreateImm(CRm));