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 DecodeGPRPairRegisterClass(MCInst &Inst, unsigned RegNo,
169 uint64_t Address, const void *Decoder);
170 static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
171 uint64_t Address, const void *Decoder);
172 static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
173 uint64_t Address, const void *Decoder);
174 static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
175 uint64_t Address, const void *Decoder);
176 static DecodeStatus DecodeDPR_VFP2RegisterClass(MCInst &Inst,
179 const void *Decoder);
180 static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
181 uint64_t Address, const void *Decoder);
182 static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
183 uint64_t Address, const void *Decoder);
184 static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
185 unsigned RegNo, uint64_t Address,
186 const void *Decoder);
188 static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
189 uint64_t Address, const void *Decoder);
190 static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
191 uint64_t Address, const void *Decoder);
192 static DecodeStatus DecodeSOImmOperand(MCInst &Inst, unsigned Val,
193 uint64_t Address, const void *Decoder);
194 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
195 uint64_t Address, const void *Decoder);
196 static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
197 uint64_t Address, const void *Decoder);
198 static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
199 uint64_t Address, const void *Decoder);
201 static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Insn,
202 uint64_t Address, const void *Decoder);
203 static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
204 uint64_t Address, const void *Decoder);
205 static DecodeStatus DecodeAddrMode2IdxInstruction(MCInst &Inst,
208 const void *Decoder);
209 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Insn,
210 uint64_t Address, const void *Decoder);
211 static DecodeStatus DecodeAddrMode3Instruction(MCInst &Inst,unsigned Insn,
212 uint64_t Address, const void *Decoder);
213 static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Insn,
214 uint64_t Address, const void *Decoder);
215 static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Insn,
216 uint64_t Address, const void *Decoder);
218 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst & Inst,
221 const void *Decoder);
222 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
223 uint64_t Address, const void *Decoder);
224 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
225 uint64_t Address, const void *Decoder);
226 static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
227 uint64_t Address, const void *Decoder);
228 static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
229 uint64_t Address, const void *Decoder);
230 static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
231 uint64_t Address, const void *Decoder);
232 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
233 uint64_t Address, const void *Decoder);
234 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
235 uint64_t Address, const void *Decoder);
236 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
237 uint64_t Address, const void *Decoder);
238 static DecodeStatus DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
239 uint64_t Address, const void *Decoder);
240 static DecodeStatus DecodeBranchImmInstruction(MCInst &Inst,unsigned Insn,
241 uint64_t Address, const void *Decoder);
242 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
243 uint64_t Address, const void *Decoder);
244 static DecodeStatus DecodeVLDST1Instruction(MCInst &Inst, unsigned Val,
245 uint64_t Address, const void *Decoder);
246 static DecodeStatus DecodeVLDST2Instruction(MCInst &Inst, unsigned Val,
247 uint64_t Address, const void *Decoder);
248 static DecodeStatus DecodeVLDST3Instruction(MCInst &Inst, unsigned Val,
249 uint64_t Address, const void *Decoder);
250 static DecodeStatus DecodeVLDST4Instruction(MCInst &Inst, unsigned Val,
251 uint64_t Address, const void *Decoder);
252 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Val,
253 uint64_t Address, const void *Decoder);
254 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Val,
255 uint64_t Address, const void *Decoder);
256 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Val,
257 uint64_t Address, const void *Decoder);
258 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Val,
259 uint64_t Address, const void *Decoder);
260 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Val,
261 uint64_t Address, const void *Decoder);
262 static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Val,
263 uint64_t Address, const void *Decoder);
264 static DecodeStatus DecodeNEONModImmInstruction(MCInst &Inst,unsigned Val,
265 uint64_t Address, const void *Decoder);
266 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Val,
267 uint64_t Address, const void *Decoder);
268 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
269 uint64_t Address, const void *Decoder);
270 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
271 uint64_t Address, const void *Decoder);
272 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
273 uint64_t Address, const void *Decoder);
274 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
275 uint64_t Address, const void *Decoder);
276 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
277 uint64_t Address, const void *Decoder);
278 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
279 uint64_t Address, const void *Decoder);
280 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Insn,
281 uint64_t Address, const void *Decoder);
282 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Insn,
283 uint64_t Address, const void *Decoder);
284 static DecodeStatus DecodeInstSyncBarrierOption(MCInst &Inst, unsigned Insn,
285 uint64_t Address, const void *Decoder);
286 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Insn,
287 uint64_t Address, const void *Decoder);
288 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
289 uint64_t Address, const void *Decoder);
290 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
291 uint64_t Address, const void *Decoder);
292 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
293 uint64_t Address, const void *Decoder);
294 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
295 uint64_t Address, const void *Decoder);
296 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
297 uint64_t Address, const void *Decoder);
298 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
299 uint64_t Address, const void *Decoder);
300 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
301 uint64_t Address, const void *Decoder);
302 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
303 uint64_t Address, const void *Decoder);
304 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
305 uint64_t Address, const void *Decoder);
306 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
307 uint64_t Address, const void *Decoder);
308 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
309 uint64_t Address, const void *Decoder);
310 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
311 uint64_t Address, const void *Decoder);
312 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
313 uint64_t Address, const void *Decoder);
314 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
315 uint64_t Address, const void *Decoder);
316 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
317 uint64_t Address, const void *Decoder);
318 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
319 uint64_t Address, const void *Decoder);
320 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
321 uint64_t Address, const void *Decoder);
322 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
323 uint64_t Address, const void *Decoder);
324 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
325 uint64_t Address, const void *Decoder);
326 static DecodeStatus DecodeImm0_4(MCInst &Inst, unsigned Insn, uint64_t Address,
327 const void *Decoder);
330 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
331 uint64_t Address, const void *Decoder);
332 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
333 uint64_t Address, const void *Decoder);
334 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
335 uint64_t Address, const void *Decoder);
336 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
337 uint64_t Address, const void *Decoder);
338 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
339 uint64_t Address, const void *Decoder);
340 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
341 uint64_t Address, const void *Decoder);
342 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
343 uint64_t Address, const void *Decoder);
344 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
345 uint64_t Address, const void *Decoder);
346 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
347 uint64_t Address, const void *Decoder);
348 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Val,
349 uint64_t Address, const void *Decoder);
350 static DecodeStatus DecodeT2LoadImm8(MCInst &Inst, unsigned Insn,
351 uint64_t Address, const void* Decoder);
352 static DecodeStatus DecodeT2LoadImm12(MCInst &Inst, unsigned Insn,
353 uint64_t Address, const void* Decoder);
354 static DecodeStatus DecodeT2LoadT(MCInst &Inst, unsigned Insn,
355 uint64_t Address, const void* Decoder);
356 static DecodeStatus DecodeT2LoadLabel(MCInst &Inst, unsigned Insn,
357 uint64_t Address, const void* Decoder);
358 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
359 uint64_t Address, const void *Decoder);
360 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
361 uint64_t Address, const void *Decoder);
362 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
363 uint64_t Address, const void *Decoder);
364 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
365 uint64_t Address, const void *Decoder);
366 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
367 uint64_t Address, const void *Decoder);
368 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Val,
369 uint64_t Address, const void *Decoder);
370 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
371 uint64_t Address, const void *Decoder);
372 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
373 uint64_t Address, const void *Decoder);
374 static DecodeStatus DecodeQADDInstruction(MCInst &Inst, unsigned Insn,
375 uint64_t Address, const void *Decoder);
376 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Insn,
377 uint64_t Address, const void *Decoder);
378 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
379 uint64_t Address, const void *Decoder);
380 static DecodeStatus DecodeThumbTableBranch(MCInst &Inst, unsigned Val,
381 uint64_t Address, const void *Decoder);
382 static DecodeStatus DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Val,
383 uint64_t Address, const void *Decoder);
384 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
385 uint64_t Address, const void *Decoder);
386 static DecodeStatus DecodeThumbBCCTargetOperand(MCInst &Inst,unsigned Val,
387 uint64_t Address, const void *Decoder);
388 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
389 uint64_t Address, const void *Decoder);
390 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Val,
391 uint64_t Address, const void *Decoder);
392 static DecodeStatus DecodeT2LDRDPreInstruction(MCInst &Inst,unsigned Insn,
393 uint64_t Address, const void *Decoder);
394 static DecodeStatus DecodeT2STRDPreInstruction(MCInst &Inst,unsigned Insn,
395 uint64_t Address, const void *Decoder);
396 static DecodeStatus DecodeT2Adr(MCInst &Inst, unsigned Val,
397 uint64_t Address, const void *Decoder);
398 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Val,
399 uint64_t Address, const void *Decoder);
400 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, unsigned Val,
401 uint64_t Address, const void *Decoder);
403 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
404 uint64_t Address, const void *Decoder);
405 static DecodeStatus DecodeMRRC2(llvm::MCInst &Inst, unsigned Val,
406 uint64_t Address, const void *Decoder);
407 #include "ARMGenDisassemblerTables.inc"
409 static MCDisassembler *createARMDisassembler(const Target &T, const MCSubtargetInfo &STI) {
410 return new ARMDisassembler(STI);
413 static MCDisassembler *createThumbDisassembler(const Target &T, const MCSubtargetInfo &STI) {
414 return new ThumbDisassembler(STI);
417 DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
418 const MemoryObject &Region,
421 raw_ostream &cs) const {
426 assert(!(STI.getFeatureBits() & ARM::ModeThumb) &&
427 "Asked to disassemble an ARM instruction but Subtarget is in Thumb mode!");
429 // We want to read exactly 4 bytes of data.
430 if (Region.readBytes(Address, 4, bytes) == -1) {
432 return MCDisassembler::Fail;
435 // Encoded as a small-endian 32-bit word in the stream.
436 uint32_t insn = (bytes[3] << 24) |
441 // Calling the auto-generated decoder function.
442 DecodeStatus result = decodeInstruction(DecoderTableARM32, MI, insn,
444 if (result != MCDisassembler::Fail) {
449 // VFP and NEON instructions, similarly, are shared between ARM
452 result = decodeInstruction(DecoderTableVFP32, MI, insn, Address, this, STI);
453 if (result != MCDisassembler::Fail) {
459 result = decodeInstruction(DecoderTableVFPV832, MI, insn, Address, this, STI);
460 if (result != MCDisassembler::Fail) {
466 result = decodeInstruction(DecoderTableNEONData32, MI, insn, Address,
468 if (result != MCDisassembler::Fail) {
470 // Add a fake predicate operand, because we share these instruction
471 // definitions with Thumb2 where these instructions are predicable.
472 if (!DecodePredicateOperand(MI, 0xE, Address, this))
473 return MCDisassembler::Fail;
478 result = decodeInstruction(DecoderTableNEONLoadStore32, MI, insn, Address,
480 if (result != MCDisassembler::Fail) {
482 // Add a fake predicate operand, because we share these instruction
483 // definitions with Thumb2 where these instructions are predicable.
484 if (!DecodePredicateOperand(MI, 0xE, Address, this))
485 return MCDisassembler::Fail;
490 result = decodeInstruction(DecoderTableNEONDup32, MI, insn, Address,
492 if (result != MCDisassembler::Fail) {
494 // Add a fake predicate operand, because we share these instruction
495 // definitions with Thumb2 where these instructions are predicable.
496 if (!DecodePredicateOperand(MI, 0xE, Address, this))
497 return MCDisassembler::Fail;
504 return MCDisassembler::Fail;
508 extern const MCInstrDesc ARMInsts[];
511 /// tryAddingSymbolicOperand - trys to add a symbolic operand in place of the
512 /// immediate Value in the MCInst. The immediate Value has had any PC
513 /// adjustment made by the caller. If the instruction is a branch instruction
514 /// then isBranch is true, else false. If the getOpInfo() function was set as
515 /// part of the setupForSymbolicDisassembly() call then that function is called
516 /// to get any symbolic information at the Address for this instruction. If
517 /// that returns non-zero then the symbolic information it returns is used to
518 /// create an MCExpr and that is added as an operand to the MCInst. If
519 /// getOpInfo() returns zero and isBranch is true then a symbol look up for
520 /// Value is done and if a symbol is found an MCExpr is created with that, else
521 /// an MCExpr with Value is created. This function returns true if it adds an
522 /// operand to the MCInst and false otherwise.
523 static bool tryAddingSymbolicOperand(uint64_t Address, int32_t Value,
524 bool isBranch, uint64_t InstSize,
525 MCInst &MI, const void *Decoder) {
526 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
527 // FIXME: Does it make sense for value to be negative?
528 return Dis->tryAddingSymbolicOperand(MI, (uint32_t)Value, Address, isBranch,
529 /* Offset */ 0, InstSize);
532 /// tryAddingPcLoadReferenceComment - trys to add a comment as to what is being
533 /// referenced by a load instruction with the base register that is the Pc.
534 /// These can often be values in a literal pool near the Address of the
535 /// instruction. The Address of the instruction and its immediate Value are
536 /// used as a possible literal pool entry. The SymbolLookUp call back will
537 /// return the name of a symbol referenced by the literal pool's entry if
538 /// the referenced address is that of a symbol. Or it will return a pointer to
539 /// a literal 'C' string if the referenced address of the literal pool's entry
540 /// is an address into a section with 'C' string literals.
541 static void tryAddingPcLoadReferenceComment(uint64_t Address, int Value,
542 const void *Decoder) {
543 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
544 Dis->tryAddingPcLoadReferenceComment(Value, Address);
547 // Thumb1 instructions don't have explicit S bits. Rather, they
548 // implicitly set CPSR. Since it's not represented in the encoding, the
549 // auto-generated decoder won't inject the CPSR operand. We need to fix
550 // that as a post-pass.
551 static void AddThumb1SBit(MCInst &MI, bool InITBlock) {
552 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
553 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
554 MCInst::iterator I = MI.begin();
555 for (unsigned i = 0; i < NumOps; ++i, ++I) {
556 if (I == MI.end()) break;
557 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) {
558 if (i > 0 && OpInfo[i-1].isPredicate()) continue;
559 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
564 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
567 // Most Thumb instructions don't have explicit predicates in the
568 // encoding, but rather get their predicates from IT context. We need
569 // to fix up the predicate operands using this context information as a
571 MCDisassembler::DecodeStatus
572 ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
573 MCDisassembler::DecodeStatus S = Success;
575 // A few instructions actually have predicates encoded in them. Don't
576 // try to overwrite it if we're seeing one of those.
577 switch (MI.getOpcode()) {
588 // Some instructions (mostly conditional branches) are not
589 // allowed in IT blocks.
590 if (ITBlock.instrInITBlock())
599 // Some instructions (mostly unconditional branches) can
600 // only appears at the end of, or outside of, an IT.
601 if (ITBlock.instrInITBlock() && !ITBlock.instrLastInITBlock())
608 // If we're in an IT block, base the predicate on that. Otherwise,
609 // assume a predicate of AL.
611 CC = ITBlock.getITCC();
614 if (ITBlock.instrInITBlock())
615 ITBlock.advanceITState();
617 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
618 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
619 MCInst::iterator I = MI.begin();
620 for (unsigned i = 0; i < NumOps; ++i, ++I) {
621 if (I == MI.end()) break;
622 if (OpInfo[i].isPredicate()) {
623 I = MI.insert(I, MCOperand::CreateImm(CC));
626 MI.insert(I, MCOperand::CreateReg(0));
628 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
633 I = MI.insert(I, MCOperand::CreateImm(CC));
636 MI.insert(I, MCOperand::CreateReg(0));
638 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
643 // Thumb VFP instructions are a special case. Because we share their
644 // encodings between ARM and Thumb modes, and they are predicable in ARM
645 // mode, the auto-generated decoder will give them an (incorrect)
646 // predicate operand. We need to rewrite these operands based on the IT
647 // context as a post-pass.
648 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
650 CC = ITBlock.getITCC();
651 if (ITBlock.instrInITBlock())
652 ITBlock.advanceITState();
654 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
655 MCInst::iterator I = MI.begin();
656 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
657 for (unsigned i = 0; i < NumOps; ++i, ++I) {
658 if (OpInfo[i].isPredicate() ) {
664 I->setReg(ARM::CPSR);
670 DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
671 const MemoryObject &Region,
674 raw_ostream &cs) const {
679 assert((STI.getFeatureBits() & ARM::ModeThumb) &&
680 "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!");
682 // We want to read exactly 2 bytes of data.
683 if (Region.readBytes(Address, 2, bytes) == -1) {
685 return MCDisassembler::Fail;
688 uint16_t insn16 = (bytes[1] << 8) | bytes[0];
689 DecodeStatus result = decodeInstruction(DecoderTableThumb16, MI, insn16,
691 if (result != MCDisassembler::Fail) {
693 Check(result, AddThumbPredicate(MI));
698 result = decodeInstruction(DecoderTableThumbSBit16, MI, insn16,
702 bool InITBlock = ITBlock.instrInITBlock();
703 Check(result, AddThumbPredicate(MI));
704 AddThumb1SBit(MI, InITBlock);
709 result = decodeInstruction(DecoderTableThumb216, MI, insn16,
711 if (result != MCDisassembler::Fail) {
714 // Nested IT blocks are UNPREDICTABLE. Must be checked before we add
715 // the Thumb predicate.
716 if (MI.getOpcode() == ARM::t2IT && ITBlock.instrInITBlock())
717 result = MCDisassembler::SoftFail;
719 Check(result, AddThumbPredicate(MI));
721 // If we find an IT instruction, we need to parse its condition
722 // code and mask operands so that we can apply them correctly
723 // to the subsequent instructions.
724 if (MI.getOpcode() == ARM::t2IT) {
726 unsigned Firstcond = MI.getOperand(0).getImm();
727 unsigned Mask = MI.getOperand(1).getImm();
728 ITBlock.setITState(Firstcond, Mask);
734 // We want to read exactly 4 bytes of data.
735 if (Region.readBytes(Address, 4, bytes) == -1) {
737 return MCDisassembler::Fail;
740 uint32_t insn32 = (bytes[3] << 8) |
745 result = decodeInstruction(DecoderTableThumb32, MI, insn32, Address,
747 if (result != MCDisassembler::Fail) {
749 bool InITBlock = ITBlock.instrInITBlock();
750 Check(result, AddThumbPredicate(MI));
751 AddThumb1SBit(MI, InITBlock);
756 result = decodeInstruction(DecoderTableThumb232, MI, insn32, Address,
758 if (result != MCDisassembler::Fail) {
760 Check(result, AddThumbPredicate(MI));
764 if (fieldFromInstruction(insn32, 28, 4) == 0xE) {
766 result = decodeInstruction(DecoderTableVFP32, MI, insn32, Address, this, STI);
767 if (result != MCDisassembler::Fail) {
769 UpdateThumbVFPPredicate(MI);
775 result = decodeInstruction(DecoderTableVFPV832, MI, insn32, Address, this, STI);
776 if (result != MCDisassembler::Fail) {
778 UpdateThumbVFPPredicate(MI);
782 if (fieldFromInstruction(insn32, 28, 4) == 0xE) {
784 result = decodeInstruction(DecoderTableNEONDup32, MI, insn32, Address,
786 if (result != MCDisassembler::Fail) {
788 Check(result, AddThumbPredicate(MI));
793 if (fieldFromInstruction(insn32, 24, 8) == 0xF9) {
795 uint32_t NEONLdStInsn = insn32;
796 NEONLdStInsn &= 0xF0FFFFFF;
797 NEONLdStInsn |= 0x04000000;
798 result = decodeInstruction(DecoderTableNEONLoadStore32, MI, NEONLdStInsn,
800 if (result != MCDisassembler::Fail) {
802 Check(result, AddThumbPredicate(MI));
807 if (fieldFromInstruction(insn32, 24, 4) == 0xF) {
809 uint32_t NEONDataInsn = insn32;
810 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
811 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
812 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
813 result = decodeInstruction(DecoderTableNEONData32, MI, NEONDataInsn,
815 if (result != MCDisassembler::Fail) {
817 Check(result, AddThumbPredicate(MI));
823 return MCDisassembler::Fail;
827 extern "C" void LLVMInitializeARMDisassembler() {
828 TargetRegistry::RegisterMCDisassembler(TheARMTarget,
829 createARMDisassembler);
830 TargetRegistry::RegisterMCDisassembler(TheThumbTarget,
831 createThumbDisassembler);
834 static const uint16_t GPRDecoderTable[] = {
835 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
836 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
837 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
838 ARM::R12, ARM::SP, ARM::LR, ARM::PC
841 static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
842 uint64_t Address, const void *Decoder) {
844 return MCDisassembler::Fail;
846 unsigned Register = GPRDecoderTable[RegNo];
847 Inst.addOperand(MCOperand::CreateReg(Register));
848 return MCDisassembler::Success;
852 DecodeGPRnopcRegisterClass(MCInst &Inst, unsigned RegNo,
853 uint64_t Address, const void *Decoder) {
854 DecodeStatus S = MCDisassembler::Success;
857 S = MCDisassembler::SoftFail;
859 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
865 DecodeGPRwithAPSRRegisterClass(MCInst &Inst, unsigned RegNo,
866 uint64_t Address, const void *Decoder) {
867 DecodeStatus S = MCDisassembler::Success;
871 Inst.addOperand(MCOperand::CreateReg(ARM::APSR_NZCV));
872 return MCDisassembler::Success;
875 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
879 static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
880 uint64_t Address, const void *Decoder) {
882 return MCDisassembler::Fail;
883 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
886 static const uint16_t GPRPairDecoderTable[] = {
887 ARM::R0_R1, ARM::R2_R3, ARM::R4_R5, ARM::R6_R7,
888 ARM::R8_R9, ARM::R10_R11, ARM::R12_SP
891 static DecodeStatus DecodeGPRPairRegisterClass(MCInst &Inst, unsigned RegNo,
892 uint64_t Address, const void *Decoder) {
893 DecodeStatus S = MCDisassembler::Success;
896 return MCDisassembler::Fail;
898 if ((RegNo & 1) || RegNo == 0xe)
899 S = MCDisassembler::SoftFail;
901 unsigned RegisterPair = GPRPairDecoderTable[RegNo/2];
902 Inst.addOperand(MCOperand::CreateReg(RegisterPair));
906 static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
907 uint64_t Address, const void *Decoder) {
908 unsigned Register = 0;
929 return MCDisassembler::Fail;
932 Inst.addOperand(MCOperand::CreateReg(Register));
933 return MCDisassembler::Success;
936 static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
937 uint64_t Address, const void *Decoder) {
938 DecodeStatus S = MCDisassembler::Success;
939 if (RegNo == 13 || RegNo == 15)
940 S = MCDisassembler::SoftFail;
941 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
945 static const uint16_t SPRDecoderTable[] = {
946 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
947 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
948 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
949 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
950 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
951 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
952 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
953 ARM::S28, ARM::S29, ARM::S30, ARM::S31
956 static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
957 uint64_t Address, const void *Decoder) {
959 return MCDisassembler::Fail;
961 unsigned Register = SPRDecoderTable[RegNo];
962 Inst.addOperand(MCOperand::CreateReg(Register));
963 return MCDisassembler::Success;
966 static const uint16_t DPRDecoderTable[] = {
967 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
968 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
969 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
970 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
971 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
972 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
973 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
974 ARM::D28, ARM::D29, ARM::D30, ARM::D31
977 static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
978 uint64_t Address, const void *Decoder) {
980 return MCDisassembler::Fail;
982 unsigned Register = DPRDecoderTable[RegNo];
983 Inst.addOperand(MCOperand::CreateReg(Register));
984 return MCDisassembler::Success;
987 static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
988 uint64_t Address, const void *Decoder) {
990 return MCDisassembler::Fail;
991 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
995 DecodeDPR_VFP2RegisterClass(MCInst &Inst, unsigned RegNo,
996 uint64_t Address, const void *Decoder) {
998 return MCDisassembler::Fail;
999 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
1002 static const uint16_t QPRDecoderTable[] = {
1003 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
1004 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
1005 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
1006 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
1010 static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
1011 uint64_t Address, const void *Decoder) {
1012 if (RegNo > 31 || (RegNo & 1) != 0)
1013 return MCDisassembler::Fail;
1016 unsigned Register = QPRDecoderTable[RegNo];
1017 Inst.addOperand(MCOperand::CreateReg(Register));
1018 return MCDisassembler::Success;
1021 static const uint16_t DPairDecoderTable[] = {
1022 ARM::Q0, ARM::D1_D2, ARM::Q1, ARM::D3_D4, ARM::Q2, ARM::D5_D6,
1023 ARM::Q3, ARM::D7_D8, ARM::Q4, ARM::D9_D10, ARM::Q5, ARM::D11_D12,
1024 ARM::Q6, ARM::D13_D14, ARM::Q7, ARM::D15_D16, ARM::Q8, ARM::D17_D18,
1025 ARM::Q9, ARM::D19_D20, ARM::Q10, ARM::D21_D22, ARM::Q11, ARM::D23_D24,
1026 ARM::Q12, ARM::D25_D26, ARM::Q13, ARM::D27_D28, ARM::Q14, ARM::D29_D30,
1030 static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
1031 uint64_t Address, const void *Decoder) {
1033 return MCDisassembler::Fail;
1035 unsigned Register = DPairDecoderTable[RegNo];
1036 Inst.addOperand(MCOperand::CreateReg(Register));
1037 return MCDisassembler::Success;
1040 static const uint16_t DPairSpacedDecoderTable[] = {
1041 ARM::D0_D2, ARM::D1_D3, ARM::D2_D4, ARM::D3_D5,
1042 ARM::D4_D6, ARM::D5_D7, ARM::D6_D8, ARM::D7_D9,
1043 ARM::D8_D10, ARM::D9_D11, ARM::D10_D12, ARM::D11_D13,
1044 ARM::D12_D14, ARM::D13_D15, ARM::D14_D16, ARM::D15_D17,
1045 ARM::D16_D18, ARM::D17_D19, ARM::D18_D20, ARM::D19_D21,
1046 ARM::D20_D22, ARM::D21_D23, ARM::D22_D24, ARM::D23_D25,
1047 ARM::D24_D26, ARM::D25_D27, ARM::D26_D28, ARM::D27_D29,
1048 ARM::D28_D30, ARM::D29_D31
1051 static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
1054 const void *Decoder) {
1056 return MCDisassembler::Fail;
1058 unsigned Register = DPairSpacedDecoderTable[RegNo];
1059 Inst.addOperand(MCOperand::CreateReg(Register));
1060 return MCDisassembler::Success;
1063 static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
1064 uint64_t Address, const void *Decoder) {
1065 if (Val == 0xF) return MCDisassembler::Fail;
1066 // AL predicate is not allowed on Thumb1 branches.
1067 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
1068 return MCDisassembler::Fail;
1069 Inst.addOperand(MCOperand::CreateImm(Val));
1070 if (Val == ARMCC::AL) {
1071 Inst.addOperand(MCOperand::CreateReg(0));
1073 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1074 return MCDisassembler::Success;
1077 static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
1078 uint64_t Address, const void *Decoder) {
1080 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1082 Inst.addOperand(MCOperand::CreateReg(0));
1083 return MCDisassembler::Success;
1086 static DecodeStatus DecodeSOImmOperand(MCInst &Inst, unsigned Val,
1087 uint64_t Address, const void *Decoder) {
1088 uint32_t imm = Val & 0xFF;
1089 uint32_t rot = (Val & 0xF00) >> 7;
1090 uint32_t rot_imm = (imm >> rot) | (imm << ((32-rot) & 0x1F));
1091 Inst.addOperand(MCOperand::CreateImm(rot_imm));
1092 return MCDisassembler::Success;
1095 static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Val,
1096 uint64_t Address, const void *Decoder) {
1097 DecodeStatus S = MCDisassembler::Success;
1099 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1100 unsigned type = fieldFromInstruction(Val, 5, 2);
1101 unsigned imm = fieldFromInstruction(Val, 7, 5);
1103 // Register-immediate
1104 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1105 return MCDisassembler::Fail;
1107 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1110 Shift = ARM_AM::lsl;
1113 Shift = ARM_AM::lsr;
1116 Shift = ARM_AM::asr;
1119 Shift = ARM_AM::ror;
1123 if (Shift == ARM_AM::ror && imm == 0)
1124 Shift = ARM_AM::rrx;
1126 unsigned Op = Shift | (imm << 3);
1127 Inst.addOperand(MCOperand::CreateImm(Op));
1132 static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Val,
1133 uint64_t Address, const void *Decoder) {
1134 DecodeStatus S = MCDisassembler::Success;
1136 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1137 unsigned type = fieldFromInstruction(Val, 5, 2);
1138 unsigned Rs = fieldFromInstruction(Val, 8, 4);
1140 // Register-register
1141 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1142 return MCDisassembler::Fail;
1143 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)))
1144 return MCDisassembler::Fail;
1146 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1149 Shift = ARM_AM::lsl;
1152 Shift = ARM_AM::lsr;
1155 Shift = ARM_AM::asr;
1158 Shift = ARM_AM::ror;
1162 Inst.addOperand(MCOperand::CreateImm(Shift));
1167 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
1168 uint64_t Address, const void *Decoder) {
1169 DecodeStatus S = MCDisassembler::Success;
1171 bool writebackLoad = false;
1172 unsigned writebackReg = 0;
1173 switch (Inst.getOpcode()) {
1176 case ARM::LDMIA_UPD:
1177 case ARM::LDMDB_UPD:
1178 case ARM::LDMIB_UPD:
1179 case ARM::LDMDA_UPD:
1180 case ARM::t2LDMIA_UPD:
1181 case ARM::t2LDMDB_UPD:
1182 writebackLoad = true;
1183 writebackReg = Inst.getOperand(0).getReg();
1187 // Empty register lists are not allowed.
1188 if (Val == 0) return MCDisassembler::Fail;
1189 for (unsigned i = 0; i < 16; ++i) {
1190 if (Val & (1 << i)) {
1191 if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder)))
1192 return MCDisassembler::Fail;
1193 // Writeback not allowed if Rn is in the target list.
1194 if (writebackLoad && writebackReg == Inst.end()[-1].getReg())
1195 Check(S, MCDisassembler::SoftFail);
1202 static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
1203 uint64_t Address, const void *Decoder) {
1204 DecodeStatus S = MCDisassembler::Success;
1206 unsigned Vd = fieldFromInstruction(Val, 8, 5);
1207 unsigned regs = fieldFromInstruction(Val, 0, 8);
1209 // In case of unpredictable encoding, tweak the operands.
1210 if (regs == 0 || (Vd + regs) > 32) {
1211 regs = Vd + regs > 32 ? 32 - Vd : regs;
1212 regs = std::max( 1u, regs);
1213 S = MCDisassembler::SoftFail;
1216 if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
1217 return MCDisassembler::Fail;
1218 for (unsigned i = 0; i < (regs - 1); ++i) {
1219 if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1220 return MCDisassembler::Fail;
1226 static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
1227 uint64_t Address, const void *Decoder) {
1228 DecodeStatus S = MCDisassembler::Success;
1230 unsigned Vd = fieldFromInstruction(Val, 8, 5);
1231 unsigned regs = fieldFromInstruction(Val, 1, 7);
1233 // In case of unpredictable encoding, tweak the operands.
1234 if (regs == 0 || regs > 16 || (Vd + regs) > 32) {
1235 regs = Vd + regs > 32 ? 32 - Vd : regs;
1236 regs = std::max( 1u, regs);
1237 regs = std::min(16u, regs);
1238 S = MCDisassembler::SoftFail;
1241 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
1242 return MCDisassembler::Fail;
1243 for (unsigned i = 0; i < (regs - 1); ++i) {
1244 if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1245 return MCDisassembler::Fail;
1251 static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Val,
1252 uint64_t Address, const void *Decoder) {
1253 // This operand encodes a mask of contiguous zeros between a specified MSB
1254 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
1255 // the mask of all bits LSB-and-lower, and then xor them to create
1256 // the mask of that's all ones on [msb, lsb]. Finally we not it to
1257 // create the final mask.
1258 unsigned msb = fieldFromInstruction(Val, 5, 5);
1259 unsigned lsb = fieldFromInstruction(Val, 0, 5);
1261 DecodeStatus S = MCDisassembler::Success;
1263 Check(S, MCDisassembler::SoftFail);
1264 // The check above will cause the warning for the "potentially undefined
1265 // instruction encoding" but we can't build a bad MCOperand value here
1266 // with a lsb > msb or else printing the MCInst will cause a crash.
1270 uint32_t msb_mask = 0xFFFFFFFF;
1271 if (msb != 31) msb_mask = (1U << (msb+1)) - 1;
1272 uint32_t lsb_mask = (1U << lsb) - 1;
1274 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
1278 static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
1279 uint64_t Address, const void *Decoder) {
1280 DecodeStatus S = MCDisassembler::Success;
1282 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1283 unsigned CRd = fieldFromInstruction(Insn, 12, 4);
1284 unsigned coproc = fieldFromInstruction(Insn, 8, 4);
1285 unsigned imm = fieldFromInstruction(Insn, 0, 8);
1286 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1287 unsigned U = fieldFromInstruction(Insn, 23, 1);
1289 switch (Inst.getOpcode()) {
1290 case ARM::LDC_OFFSET:
1293 case ARM::LDC_OPTION:
1294 case ARM::LDCL_OFFSET:
1296 case ARM::LDCL_POST:
1297 case ARM::LDCL_OPTION:
1298 case ARM::STC_OFFSET:
1301 case ARM::STC_OPTION:
1302 case ARM::STCL_OFFSET:
1304 case ARM::STCL_POST:
1305 case ARM::STCL_OPTION:
1306 case ARM::t2LDC_OFFSET:
1307 case ARM::t2LDC_PRE:
1308 case ARM::t2LDC_POST:
1309 case ARM::t2LDC_OPTION:
1310 case ARM::t2LDCL_OFFSET:
1311 case ARM::t2LDCL_PRE:
1312 case ARM::t2LDCL_POST:
1313 case ARM::t2LDCL_OPTION:
1314 case ARM::t2STC_OFFSET:
1315 case ARM::t2STC_PRE:
1316 case ARM::t2STC_POST:
1317 case ARM::t2STC_OPTION:
1318 case ARM::t2STCL_OFFSET:
1319 case ARM::t2STCL_PRE:
1320 case ARM::t2STCL_POST:
1321 case ARM::t2STCL_OPTION:
1322 if (coproc == 0xA || coproc == 0xB)
1323 return MCDisassembler::Fail;
1329 Inst.addOperand(MCOperand::CreateImm(coproc));
1330 Inst.addOperand(MCOperand::CreateImm(CRd));
1331 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1332 return MCDisassembler::Fail;
1334 switch (Inst.getOpcode()) {
1335 case ARM::t2LDC2_OFFSET:
1336 case ARM::t2LDC2L_OFFSET:
1337 case ARM::t2LDC2_PRE:
1338 case ARM::t2LDC2L_PRE:
1339 case ARM::t2STC2_OFFSET:
1340 case ARM::t2STC2L_OFFSET:
1341 case ARM::t2STC2_PRE:
1342 case ARM::t2STC2L_PRE:
1343 case ARM::LDC2_OFFSET:
1344 case ARM::LDC2L_OFFSET:
1346 case ARM::LDC2L_PRE:
1347 case ARM::STC2_OFFSET:
1348 case ARM::STC2L_OFFSET:
1350 case ARM::STC2L_PRE:
1351 case ARM::t2LDC_OFFSET:
1352 case ARM::t2LDCL_OFFSET:
1353 case ARM::t2LDC_PRE:
1354 case ARM::t2LDCL_PRE:
1355 case ARM::t2STC_OFFSET:
1356 case ARM::t2STCL_OFFSET:
1357 case ARM::t2STC_PRE:
1358 case ARM::t2STCL_PRE:
1359 case ARM::LDC_OFFSET:
1360 case ARM::LDCL_OFFSET:
1363 case ARM::STC_OFFSET:
1364 case ARM::STCL_OFFSET:
1367 imm = ARM_AM::getAM5Opc(U ? ARM_AM::add : ARM_AM::sub, imm);
1368 Inst.addOperand(MCOperand::CreateImm(imm));
1370 case ARM::t2LDC2_POST:
1371 case ARM::t2LDC2L_POST:
1372 case ARM::t2STC2_POST:
1373 case ARM::t2STC2L_POST:
1374 case ARM::LDC2_POST:
1375 case ARM::LDC2L_POST:
1376 case ARM::STC2_POST:
1377 case ARM::STC2L_POST:
1378 case ARM::t2LDC_POST:
1379 case ARM::t2LDCL_POST:
1380 case ARM::t2STC_POST:
1381 case ARM::t2STCL_POST:
1383 case ARM::LDCL_POST:
1385 case ARM::STCL_POST:
1389 // The 'option' variant doesn't encode 'U' in the immediate since
1390 // the immediate is unsigned [0,255].
1391 Inst.addOperand(MCOperand::CreateImm(imm));
1395 switch (Inst.getOpcode()) {
1396 case ARM::LDC_OFFSET:
1399 case ARM::LDC_OPTION:
1400 case ARM::LDCL_OFFSET:
1402 case ARM::LDCL_POST:
1403 case ARM::LDCL_OPTION:
1404 case ARM::STC_OFFSET:
1407 case ARM::STC_OPTION:
1408 case ARM::STCL_OFFSET:
1410 case ARM::STCL_POST:
1411 case ARM::STCL_OPTION:
1412 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1413 return MCDisassembler::Fail;
1423 DecodeAddrMode2IdxInstruction(MCInst &Inst, unsigned Insn,
1424 uint64_t Address, const void *Decoder) {
1425 DecodeStatus S = MCDisassembler::Success;
1427 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1428 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1429 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1430 unsigned imm = fieldFromInstruction(Insn, 0, 12);
1431 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1432 unsigned reg = fieldFromInstruction(Insn, 25, 1);
1433 unsigned P = fieldFromInstruction(Insn, 24, 1);
1434 unsigned W = fieldFromInstruction(Insn, 21, 1);
1436 // On stores, the writeback operand precedes Rt.
1437 switch (Inst.getOpcode()) {
1438 case ARM::STR_POST_IMM:
1439 case ARM::STR_POST_REG:
1440 case ARM::STRB_POST_IMM:
1441 case ARM::STRB_POST_REG:
1442 case ARM::STRT_POST_REG:
1443 case ARM::STRT_POST_IMM:
1444 case ARM::STRBT_POST_REG:
1445 case ARM::STRBT_POST_IMM:
1446 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1447 return MCDisassembler::Fail;
1453 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1454 return MCDisassembler::Fail;
1456 // On loads, the writeback operand comes after Rt.
1457 switch (Inst.getOpcode()) {
1458 case ARM::LDR_POST_IMM:
1459 case ARM::LDR_POST_REG:
1460 case ARM::LDRB_POST_IMM:
1461 case ARM::LDRB_POST_REG:
1462 case ARM::LDRBT_POST_REG:
1463 case ARM::LDRBT_POST_IMM:
1464 case ARM::LDRT_POST_REG:
1465 case ARM::LDRT_POST_IMM:
1466 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1467 return MCDisassembler::Fail;
1473 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1474 return MCDisassembler::Fail;
1476 ARM_AM::AddrOpc Op = ARM_AM::add;
1477 if (!fieldFromInstruction(Insn, 23, 1))
1480 bool writeback = (P == 0) || (W == 1);
1481 unsigned idx_mode = 0;
1483 idx_mode = ARMII::IndexModePre;
1484 else if (!P && writeback)
1485 idx_mode = ARMII::IndexModePost;
1487 if (writeback && (Rn == 15 || Rn == Rt))
1488 S = MCDisassembler::SoftFail; // UNPREDICTABLE
1491 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1492 return MCDisassembler::Fail;
1493 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1494 switch( fieldFromInstruction(Insn, 5, 2)) {
1508 return MCDisassembler::Fail;
1510 unsigned amt = fieldFromInstruction(Insn, 7, 5);
1511 if (Opc == ARM_AM::ror && amt == 0)
1513 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1515 Inst.addOperand(MCOperand::CreateImm(imm));
1517 Inst.addOperand(MCOperand::CreateReg(0));
1518 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1519 Inst.addOperand(MCOperand::CreateImm(tmp));
1522 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1523 return MCDisassembler::Fail;
1528 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Val,
1529 uint64_t Address, const void *Decoder) {
1530 DecodeStatus S = MCDisassembler::Success;
1532 unsigned Rn = fieldFromInstruction(Val, 13, 4);
1533 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1534 unsigned type = fieldFromInstruction(Val, 5, 2);
1535 unsigned imm = fieldFromInstruction(Val, 7, 5);
1536 unsigned U = fieldFromInstruction(Val, 12, 1);
1538 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1554 if (ShOp == ARM_AM::ror && imm == 0)
1557 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1558 return MCDisassembler::Fail;
1559 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1560 return MCDisassembler::Fail;
1563 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1565 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1566 Inst.addOperand(MCOperand::CreateImm(shift));
1572 DecodeAddrMode3Instruction(MCInst &Inst, unsigned Insn,
1573 uint64_t Address, const void *Decoder) {
1574 DecodeStatus S = MCDisassembler::Success;
1576 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1577 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1578 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1579 unsigned type = fieldFromInstruction(Insn, 22, 1);
1580 unsigned imm = fieldFromInstruction(Insn, 8, 4);
1581 unsigned U = ((~fieldFromInstruction(Insn, 23, 1)) & 1) << 8;
1582 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1583 unsigned W = fieldFromInstruction(Insn, 21, 1);
1584 unsigned P = fieldFromInstruction(Insn, 24, 1);
1585 unsigned Rt2 = Rt + 1;
1587 bool writeback = (W == 1) | (P == 0);
1589 // For {LD,ST}RD, Rt must be even, else undefined.
1590 switch (Inst.getOpcode()) {
1593 case ARM::STRD_POST:
1596 case ARM::LDRD_POST:
1597 if (Rt & 0x1) S = MCDisassembler::SoftFail;
1602 switch (Inst.getOpcode()) {
1605 case ARM::STRD_POST:
1606 if (P == 0 && W == 1)
1607 S = MCDisassembler::SoftFail;
1609 if (writeback && (Rn == 15 || Rn == Rt || Rn == Rt2))
1610 S = MCDisassembler::SoftFail;
1611 if (type && Rm == 15)
1612 S = MCDisassembler::SoftFail;
1614 S = MCDisassembler::SoftFail;
1615 if (!type && fieldFromInstruction(Insn, 8, 4))
1616 S = MCDisassembler::SoftFail;
1620 case ARM::STRH_POST:
1622 S = MCDisassembler::SoftFail;
1623 if (writeback && (Rn == 15 || Rn == Rt))
1624 S = MCDisassembler::SoftFail;
1625 if (!type && Rm == 15)
1626 S = MCDisassembler::SoftFail;
1630 case ARM::LDRD_POST:
1631 if (type && Rn == 15){
1633 S = MCDisassembler::SoftFail;
1636 if (P == 0 && W == 1)
1637 S = MCDisassembler::SoftFail;
1638 if (!type && (Rt2 == 15 || Rm == 15 || Rm == Rt || Rm == Rt2))
1639 S = MCDisassembler::SoftFail;
1640 if (!type && writeback && Rn == 15)
1641 S = MCDisassembler::SoftFail;
1642 if (writeback && (Rn == Rt || Rn == Rt2))
1643 S = MCDisassembler::SoftFail;
1647 case ARM::LDRH_POST:
1648 if (type && Rn == 15){
1650 S = MCDisassembler::SoftFail;
1654 S = MCDisassembler::SoftFail;
1655 if (!type && Rm == 15)
1656 S = MCDisassembler::SoftFail;
1657 if (!type && writeback && (Rn == 15 || Rn == Rt))
1658 S = MCDisassembler::SoftFail;
1661 case ARM::LDRSH_PRE:
1662 case ARM::LDRSH_POST:
1664 case ARM::LDRSB_PRE:
1665 case ARM::LDRSB_POST:
1666 if (type && Rn == 15){
1668 S = MCDisassembler::SoftFail;
1671 if (type && (Rt == 15 || (writeback && Rn == Rt)))
1672 S = MCDisassembler::SoftFail;
1673 if (!type && (Rt == 15 || Rm == 15))
1674 S = MCDisassembler::SoftFail;
1675 if (!type && writeback && (Rn == 15 || Rn == Rt))
1676 S = MCDisassembler::SoftFail;
1682 if (writeback) { // Writeback
1684 U |= ARMII::IndexModePre << 9;
1686 U |= ARMII::IndexModePost << 9;
1688 // On stores, the writeback operand precedes Rt.
1689 switch (Inst.getOpcode()) {
1692 case ARM::STRD_POST:
1695 case ARM::STRH_POST:
1696 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1697 return MCDisassembler::Fail;
1704 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1705 return MCDisassembler::Fail;
1706 switch (Inst.getOpcode()) {
1709 case ARM::STRD_POST:
1712 case ARM::LDRD_POST:
1713 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
1714 return MCDisassembler::Fail;
1721 // On loads, the writeback operand comes after Rt.
1722 switch (Inst.getOpcode()) {
1725 case ARM::LDRD_POST:
1728 case ARM::LDRH_POST:
1730 case ARM::LDRSH_PRE:
1731 case ARM::LDRSH_POST:
1733 case ARM::LDRSB_PRE:
1734 case ARM::LDRSB_POST:
1737 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1738 return MCDisassembler::Fail;
1745 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1746 return MCDisassembler::Fail;
1749 Inst.addOperand(MCOperand::CreateReg(0));
1750 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1752 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1753 return MCDisassembler::Fail;
1754 Inst.addOperand(MCOperand::CreateImm(U));
1757 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1758 return MCDisassembler::Fail;
1763 static DecodeStatus DecodeRFEInstruction(MCInst &Inst, unsigned Insn,
1764 uint64_t Address, const void *Decoder) {
1765 DecodeStatus S = MCDisassembler::Success;
1767 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1768 unsigned mode = fieldFromInstruction(Insn, 23, 2);
1785 Inst.addOperand(MCOperand::CreateImm(mode));
1786 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1787 return MCDisassembler::Fail;
1792 static DecodeStatus DecodeQADDInstruction(MCInst &Inst, unsigned Insn,
1793 uint64_t Address, const void *Decoder) {
1794 DecodeStatus S = MCDisassembler::Success;
1796 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
1797 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1798 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1799 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1802 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
1804 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1805 return MCDisassembler::Fail;
1806 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1807 return MCDisassembler::Fail;
1808 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
1809 return MCDisassembler::Fail;
1810 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1811 return MCDisassembler::Fail;
1815 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst &Inst,
1817 uint64_t Address, const void *Decoder) {
1818 DecodeStatus S = MCDisassembler::Success;
1820 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1821 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1822 unsigned reglist = fieldFromInstruction(Insn, 0, 16);
1825 // Ambiguous with RFE and SRS
1826 switch (Inst.getOpcode()) {
1828 Inst.setOpcode(ARM::RFEDA);
1830 case ARM::LDMDA_UPD:
1831 Inst.setOpcode(ARM::RFEDA_UPD);
1834 Inst.setOpcode(ARM::RFEDB);
1836 case ARM::LDMDB_UPD:
1837 Inst.setOpcode(ARM::RFEDB_UPD);
1840 Inst.setOpcode(ARM::RFEIA);
1842 case ARM::LDMIA_UPD:
1843 Inst.setOpcode(ARM::RFEIA_UPD);
1846 Inst.setOpcode(ARM::RFEIB);
1848 case ARM::LDMIB_UPD:
1849 Inst.setOpcode(ARM::RFEIB_UPD);
1852 Inst.setOpcode(ARM::SRSDA);
1854 case ARM::STMDA_UPD:
1855 Inst.setOpcode(ARM::SRSDA_UPD);
1858 Inst.setOpcode(ARM::SRSDB);
1860 case ARM::STMDB_UPD:
1861 Inst.setOpcode(ARM::SRSDB_UPD);
1864 Inst.setOpcode(ARM::SRSIA);
1866 case ARM::STMIA_UPD:
1867 Inst.setOpcode(ARM::SRSIA_UPD);
1870 Inst.setOpcode(ARM::SRSIB);
1872 case ARM::STMIB_UPD:
1873 Inst.setOpcode(ARM::SRSIB_UPD);
1876 return MCDisassembler::Fail;
1879 // For stores (which become SRS's, the only operand is the mode.
1880 if (fieldFromInstruction(Insn, 20, 1) == 0) {
1881 // Check SRS encoding constraints
1882 if (!(fieldFromInstruction(Insn, 22, 1) == 1 &&
1883 fieldFromInstruction(Insn, 20, 1) == 0))
1884 return MCDisassembler::Fail;
1887 MCOperand::CreateImm(fieldFromInstruction(Insn, 0, 4)));
1891 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1894 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1895 return MCDisassembler::Fail;
1896 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1897 return MCDisassembler::Fail; // Tied
1898 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1899 return MCDisassembler::Fail;
1900 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
1901 return MCDisassembler::Fail;
1906 static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
1907 uint64_t Address, const void *Decoder) {
1908 unsigned imod = fieldFromInstruction(Insn, 18, 2);
1909 unsigned M = fieldFromInstruction(Insn, 17, 1);
1910 unsigned iflags = fieldFromInstruction(Insn, 6, 3);
1911 unsigned mode = fieldFromInstruction(Insn, 0, 5);
1913 DecodeStatus S = MCDisassembler::Success;
1915 // This decoder is called from multiple location that do not check
1916 // the full encoding is valid before they do.
1917 if (fieldFromInstruction(Insn, 5, 1) != 0 ||
1918 fieldFromInstruction(Insn, 16, 1) != 0 ||
1919 fieldFromInstruction(Insn, 20, 8) != 0x10)
1920 return MCDisassembler::Fail;
1922 // imod == '01' --> UNPREDICTABLE
1923 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1924 // return failure here. The '01' imod value is unprintable, so there's
1925 // nothing useful we could do even if we returned UNPREDICTABLE.
1927 if (imod == 1) return MCDisassembler::Fail;
1930 Inst.setOpcode(ARM::CPS3p);
1931 Inst.addOperand(MCOperand::CreateImm(imod));
1932 Inst.addOperand(MCOperand::CreateImm(iflags));
1933 Inst.addOperand(MCOperand::CreateImm(mode));
1934 } else if (imod && !M) {
1935 Inst.setOpcode(ARM::CPS2p);
1936 Inst.addOperand(MCOperand::CreateImm(imod));
1937 Inst.addOperand(MCOperand::CreateImm(iflags));
1938 if (mode) S = MCDisassembler::SoftFail;
1939 } else if (!imod && M) {
1940 Inst.setOpcode(ARM::CPS1p);
1941 Inst.addOperand(MCOperand::CreateImm(mode));
1942 if (iflags) S = MCDisassembler::SoftFail;
1944 // imod == '00' && M == '0' --> UNPREDICTABLE
1945 Inst.setOpcode(ARM::CPS1p);
1946 Inst.addOperand(MCOperand::CreateImm(mode));
1947 S = MCDisassembler::SoftFail;
1953 static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
1954 uint64_t Address, const void *Decoder) {
1955 unsigned imod = fieldFromInstruction(Insn, 9, 2);
1956 unsigned M = fieldFromInstruction(Insn, 8, 1);
1957 unsigned iflags = fieldFromInstruction(Insn, 5, 3);
1958 unsigned mode = fieldFromInstruction(Insn, 0, 5);
1960 DecodeStatus S = MCDisassembler::Success;
1962 // imod == '01' --> UNPREDICTABLE
1963 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1964 // return failure here. The '01' imod value is unprintable, so there's
1965 // nothing useful we could do even if we returned UNPREDICTABLE.
1967 if (imod == 1) return MCDisassembler::Fail;
1970 Inst.setOpcode(ARM::t2CPS3p);
1971 Inst.addOperand(MCOperand::CreateImm(imod));
1972 Inst.addOperand(MCOperand::CreateImm(iflags));
1973 Inst.addOperand(MCOperand::CreateImm(mode));
1974 } else if (imod && !M) {
1975 Inst.setOpcode(ARM::t2CPS2p);
1976 Inst.addOperand(MCOperand::CreateImm(imod));
1977 Inst.addOperand(MCOperand::CreateImm(iflags));
1978 if (mode) S = MCDisassembler::SoftFail;
1979 } else if (!imod && M) {
1980 Inst.setOpcode(ARM::t2CPS1p);
1981 Inst.addOperand(MCOperand::CreateImm(mode));
1982 if (iflags) S = MCDisassembler::SoftFail;
1984 // imod == '00' && M == '0' --> this is a HINT instruction
1985 int imm = fieldFromInstruction(Insn, 0, 8);
1986 // HINT are defined only for immediate in [0..4]
1987 if(imm > 4) return MCDisassembler::Fail;
1988 Inst.setOpcode(ARM::t2HINT);
1989 Inst.addOperand(MCOperand::CreateImm(imm));
1995 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
1996 uint64_t Address, const void *Decoder) {
1997 DecodeStatus S = MCDisassembler::Success;
1999 unsigned Rd = fieldFromInstruction(Insn, 8, 4);
2002 imm |= (fieldFromInstruction(Insn, 0, 8) << 0);
2003 imm |= (fieldFromInstruction(Insn, 12, 3) << 8);
2004 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
2005 imm |= (fieldFromInstruction(Insn, 26, 1) << 11);
2007 if (Inst.getOpcode() == ARM::t2MOVTi16)
2008 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
2009 return MCDisassembler::Fail;
2010 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
2011 return MCDisassembler::Fail;
2013 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
2014 Inst.addOperand(MCOperand::CreateImm(imm));
2019 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
2020 uint64_t Address, const void *Decoder) {
2021 DecodeStatus S = MCDisassembler::Success;
2023 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2024 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2027 imm |= (fieldFromInstruction(Insn, 0, 12) << 0);
2028 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
2030 if (Inst.getOpcode() == ARM::MOVTi16)
2031 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2032 return MCDisassembler::Fail;
2034 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2035 return MCDisassembler::Fail;
2037 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
2038 Inst.addOperand(MCOperand::CreateImm(imm));
2040 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2041 return MCDisassembler::Fail;
2046 static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
2047 uint64_t Address, const void *Decoder) {
2048 DecodeStatus S = MCDisassembler::Success;
2050 unsigned Rd = fieldFromInstruction(Insn, 16, 4);
2051 unsigned Rn = fieldFromInstruction(Insn, 0, 4);
2052 unsigned Rm = fieldFromInstruction(Insn, 8, 4);
2053 unsigned Ra = fieldFromInstruction(Insn, 12, 4);
2054 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2057 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
2059 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2060 return MCDisassembler::Fail;
2061 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
2062 return MCDisassembler::Fail;
2063 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
2064 return MCDisassembler::Fail;
2065 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
2066 return MCDisassembler::Fail;
2068 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2069 return MCDisassembler::Fail;
2074 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
2075 uint64_t Address, const void *Decoder) {
2076 DecodeStatus S = MCDisassembler::Success;
2078 unsigned add = fieldFromInstruction(Val, 12, 1);
2079 unsigned imm = fieldFromInstruction(Val, 0, 12);
2080 unsigned Rn = fieldFromInstruction(Val, 13, 4);
2082 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2083 return MCDisassembler::Fail;
2085 if (!add) imm *= -1;
2086 if (imm == 0 && !add) imm = INT32_MIN;
2087 Inst.addOperand(MCOperand::CreateImm(imm));
2089 tryAddingPcLoadReferenceComment(Address, Address + imm + 8, Decoder);
2094 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
2095 uint64_t Address, const void *Decoder) {
2096 DecodeStatus S = MCDisassembler::Success;
2098 unsigned Rn = fieldFromInstruction(Val, 9, 4);
2099 unsigned U = fieldFromInstruction(Val, 8, 1);
2100 unsigned imm = fieldFromInstruction(Val, 0, 8);
2102 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2103 return MCDisassembler::Fail;
2106 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
2108 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
2113 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
2114 uint64_t Address, const void *Decoder) {
2115 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
2119 DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
2120 uint64_t Address, const void *Decoder) {
2121 DecodeStatus Status = MCDisassembler::Success;
2123 // Note the J1 and J2 values are from the encoded instruction. So here
2124 // change them to I1 and I2 values via as documented:
2125 // I1 = NOT(J1 EOR S);
2126 // I2 = NOT(J2 EOR S);
2127 // and build the imm32 with one trailing zero as documented:
2128 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
2129 unsigned S = fieldFromInstruction(Insn, 26, 1);
2130 unsigned J1 = fieldFromInstruction(Insn, 13, 1);
2131 unsigned J2 = fieldFromInstruction(Insn, 11, 1);
2132 unsigned I1 = !(J1 ^ S);
2133 unsigned I2 = !(J2 ^ S);
2134 unsigned imm10 = fieldFromInstruction(Insn, 16, 10);
2135 unsigned imm11 = fieldFromInstruction(Insn, 0, 11);
2136 unsigned tmp = (S << 23) | (I1 << 22) | (I2 << 21) | (imm10 << 11) | imm11;
2137 int imm32 = SignExtend32<25>(tmp << 1);
2138 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
2139 true, 4, Inst, Decoder))
2140 Inst.addOperand(MCOperand::CreateImm(imm32));
2146 DecodeBranchImmInstruction(MCInst &Inst, unsigned Insn,
2147 uint64_t Address, const void *Decoder) {
2148 DecodeStatus S = MCDisassembler::Success;
2150 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2151 unsigned imm = fieldFromInstruction(Insn, 0, 24) << 2;
2154 Inst.setOpcode(ARM::BLXi);
2155 imm |= fieldFromInstruction(Insn, 24, 1) << 1;
2156 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2157 true, 4, Inst, Decoder))
2158 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2162 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2163 true, 4, Inst, Decoder))
2164 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2165 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2166 return MCDisassembler::Fail;
2172 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
2173 uint64_t Address, const void *Decoder) {
2174 DecodeStatus S = MCDisassembler::Success;
2176 unsigned Rm = fieldFromInstruction(Val, 0, 4);
2177 unsigned align = fieldFromInstruction(Val, 4, 2);
2179 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2180 return MCDisassembler::Fail;
2182 Inst.addOperand(MCOperand::CreateImm(0));
2184 Inst.addOperand(MCOperand::CreateImm(4 << align));
2189 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Insn,
2190 uint64_t Address, const void *Decoder) {
2191 DecodeStatus S = MCDisassembler::Success;
2193 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2194 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2195 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2196 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2197 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2198 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2200 // First output register
2201 switch (Inst.getOpcode()) {
2202 case ARM::VLD1q16: case ARM::VLD1q32: case ARM::VLD1q64: case ARM::VLD1q8:
2203 case ARM::VLD1q16wb_fixed: case ARM::VLD1q16wb_register:
2204 case ARM::VLD1q32wb_fixed: case ARM::VLD1q32wb_register:
2205 case ARM::VLD1q64wb_fixed: case ARM::VLD1q64wb_register:
2206 case ARM::VLD1q8wb_fixed: case ARM::VLD1q8wb_register:
2207 case ARM::VLD2d16: case ARM::VLD2d32: case ARM::VLD2d8:
2208 case ARM::VLD2d16wb_fixed: case ARM::VLD2d16wb_register:
2209 case ARM::VLD2d32wb_fixed: case ARM::VLD2d32wb_register:
2210 case ARM::VLD2d8wb_fixed: case ARM::VLD2d8wb_register:
2211 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2212 return MCDisassembler::Fail;
2217 case ARM::VLD2b16wb_fixed:
2218 case ARM::VLD2b16wb_register:
2219 case ARM::VLD2b32wb_fixed:
2220 case ARM::VLD2b32wb_register:
2221 case ARM::VLD2b8wb_fixed:
2222 case ARM::VLD2b8wb_register:
2223 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2224 return MCDisassembler::Fail;
2227 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2228 return MCDisassembler::Fail;
2231 // Second output register
2232 switch (Inst.getOpcode()) {
2236 case ARM::VLD3d8_UPD:
2237 case ARM::VLD3d16_UPD:
2238 case ARM::VLD3d32_UPD:
2242 case ARM::VLD4d8_UPD:
2243 case ARM::VLD4d16_UPD:
2244 case ARM::VLD4d32_UPD:
2245 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2246 return MCDisassembler::Fail;
2251 case ARM::VLD3q8_UPD:
2252 case ARM::VLD3q16_UPD:
2253 case ARM::VLD3q32_UPD:
2257 case ARM::VLD4q8_UPD:
2258 case ARM::VLD4q16_UPD:
2259 case ARM::VLD4q32_UPD:
2260 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2261 return MCDisassembler::Fail;
2266 // Third output register
2267 switch(Inst.getOpcode()) {
2271 case ARM::VLD3d8_UPD:
2272 case ARM::VLD3d16_UPD:
2273 case ARM::VLD3d32_UPD:
2277 case ARM::VLD4d8_UPD:
2278 case ARM::VLD4d16_UPD:
2279 case ARM::VLD4d32_UPD:
2280 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2281 return MCDisassembler::Fail;
2286 case ARM::VLD3q8_UPD:
2287 case ARM::VLD3q16_UPD:
2288 case ARM::VLD3q32_UPD:
2292 case ARM::VLD4q8_UPD:
2293 case ARM::VLD4q16_UPD:
2294 case ARM::VLD4q32_UPD:
2295 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2296 return MCDisassembler::Fail;
2302 // Fourth output register
2303 switch (Inst.getOpcode()) {
2307 case ARM::VLD4d8_UPD:
2308 case ARM::VLD4d16_UPD:
2309 case ARM::VLD4d32_UPD:
2310 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2311 return MCDisassembler::Fail;
2316 case ARM::VLD4q8_UPD:
2317 case ARM::VLD4q16_UPD:
2318 case ARM::VLD4q32_UPD:
2319 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2320 return MCDisassembler::Fail;
2326 // Writeback operand
2327 switch (Inst.getOpcode()) {
2328 case ARM::VLD1d8wb_fixed:
2329 case ARM::VLD1d16wb_fixed:
2330 case ARM::VLD1d32wb_fixed:
2331 case ARM::VLD1d64wb_fixed:
2332 case ARM::VLD1d8wb_register:
2333 case ARM::VLD1d16wb_register:
2334 case ARM::VLD1d32wb_register:
2335 case ARM::VLD1d64wb_register:
2336 case ARM::VLD1q8wb_fixed:
2337 case ARM::VLD1q16wb_fixed:
2338 case ARM::VLD1q32wb_fixed:
2339 case ARM::VLD1q64wb_fixed:
2340 case ARM::VLD1q8wb_register:
2341 case ARM::VLD1q16wb_register:
2342 case ARM::VLD1q32wb_register:
2343 case ARM::VLD1q64wb_register:
2344 case ARM::VLD1d8Twb_fixed:
2345 case ARM::VLD1d8Twb_register:
2346 case ARM::VLD1d16Twb_fixed:
2347 case ARM::VLD1d16Twb_register:
2348 case ARM::VLD1d32Twb_fixed:
2349 case ARM::VLD1d32Twb_register:
2350 case ARM::VLD1d64Twb_fixed:
2351 case ARM::VLD1d64Twb_register:
2352 case ARM::VLD1d8Qwb_fixed:
2353 case ARM::VLD1d8Qwb_register:
2354 case ARM::VLD1d16Qwb_fixed:
2355 case ARM::VLD1d16Qwb_register:
2356 case ARM::VLD1d32Qwb_fixed:
2357 case ARM::VLD1d32Qwb_register:
2358 case ARM::VLD1d64Qwb_fixed:
2359 case ARM::VLD1d64Qwb_register:
2360 case ARM::VLD2d8wb_fixed:
2361 case ARM::VLD2d16wb_fixed:
2362 case ARM::VLD2d32wb_fixed:
2363 case ARM::VLD2q8wb_fixed:
2364 case ARM::VLD2q16wb_fixed:
2365 case ARM::VLD2q32wb_fixed:
2366 case ARM::VLD2d8wb_register:
2367 case ARM::VLD2d16wb_register:
2368 case ARM::VLD2d32wb_register:
2369 case ARM::VLD2q8wb_register:
2370 case ARM::VLD2q16wb_register:
2371 case ARM::VLD2q32wb_register:
2372 case ARM::VLD2b8wb_fixed:
2373 case ARM::VLD2b16wb_fixed:
2374 case ARM::VLD2b32wb_fixed:
2375 case ARM::VLD2b8wb_register:
2376 case ARM::VLD2b16wb_register:
2377 case ARM::VLD2b32wb_register:
2378 Inst.addOperand(MCOperand::CreateImm(0));
2380 case ARM::VLD3d8_UPD:
2381 case ARM::VLD3d16_UPD:
2382 case ARM::VLD3d32_UPD:
2383 case ARM::VLD3q8_UPD:
2384 case ARM::VLD3q16_UPD:
2385 case ARM::VLD3q32_UPD:
2386 case ARM::VLD4d8_UPD:
2387 case ARM::VLD4d16_UPD:
2388 case ARM::VLD4d32_UPD:
2389 case ARM::VLD4q8_UPD:
2390 case ARM::VLD4q16_UPD:
2391 case ARM::VLD4q32_UPD:
2392 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2393 return MCDisassembler::Fail;
2399 // AddrMode6 Base (register+alignment)
2400 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2401 return MCDisassembler::Fail;
2403 // AddrMode6 Offset (register)
2404 switch (Inst.getOpcode()) {
2406 // The below have been updated to have explicit am6offset split
2407 // between fixed and register offset. For those instructions not
2408 // yet updated, we need to add an additional reg0 operand for the
2411 // The fixed offset encodes as Rm == 0xd, so we check for that.
2413 Inst.addOperand(MCOperand::CreateReg(0));
2416 // Fall through to handle the register offset variant.
2417 case ARM::VLD1d8wb_fixed:
2418 case ARM::VLD1d16wb_fixed:
2419 case ARM::VLD1d32wb_fixed:
2420 case ARM::VLD1d64wb_fixed:
2421 case ARM::VLD1d8Twb_fixed:
2422 case ARM::VLD1d16Twb_fixed:
2423 case ARM::VLD1d32Twb_fixed:
2424 case ARM::VLD1d64Twb_fixed:
2425 case ARM::VLD1d8Qwb_fixed:
2426 case ARM::VLD1d16Qwb_fixed:
2427 case ARM::VLD1d32Qwb_fixed:
2428 case ARM::VLD1d64Qwb_fixed:
2429 case ARM::VLD1d8wb_register:
2430 case ARM::VLD1d16wb_register:
2431 case ARM::VLD1d32wb_register:
2432 case ARM::VLD1d64wb_register:
2433 case ARM::VLD1q8wb_fixed:
2434 case ARM::VLD1q16wb_fixed:
2435 case ARM::VLD1q32wb_fixed:
2436 case ARM::VLD1q64wb_fixed:
2437 case ARM::VLD1q8wb_register:
2438 case ARM::VLD1q16wb_register:
2439 case ARM::VLD1q32wb_register:
2440 case ARM::VLD1q64wb_register:
2441 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2442 // variant encodes Rm == 0xf. Anything else is a register offset post-
2443 // increment and we need to add the register operand to the instruction.
2444 if (Rm != 0xD && Rm != 0xF &&
2445 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2446 return MCDisassembler::Fail;
2448 case ARM::VLD2d8wb_fixed:
2449 case ARM::VLD2d16wb_fixed:
2450 case ARM::VLD2d32wb_fixed:
2451 case ARM::VLD2b8wb_fixed:
2452 case ARM::VLD2b16wb_fixed:
2453 case ARM::VLD2b32wb_fixed:
2454 case ARM::VLD2q8wb_fixed:
2455 case ARM::VLD2q16wb_fixed:
2456 case ARM::VLD2q32wb_fixed:
2463 static DecodeStatus DecodeVLDST1Instruction(MCInst &Inst, unsigned Insn,
2464 uint64_t Address, const void *Decoder) {
2465 unsigned type = fieldFromInstruction(Insn, 8, 4);
2466 unsigned align = fieldFromInstruction(Insn, 4, 2);
2467 if (type == 6 && (align & 2)) return MCDisassembler::Fail;
2468 if (type == 7 && (align & 2)) return MCDisassembler::Fail;
2469 if (type == 10 && align == 3) return MCDisassembler::Fail;
2471 unsigned load = fieldFromInstruction(Insn, 21, 1);
2472 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
2473 : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
2476 static DecodeStatus DecodeVLDST2Instruction(MCInst &Inst, unsigned Insn,
2477 uint64_t Address, const void *Decoder) {
2478 unsigned size = fieldFromInstruction(Insn, 6, 2);
2479 if (size == 3) return MCDisassembler::Fail;
2481 unsigned type = fieldFromInstruction(Insn, 8, 4);
2482 unsigned align = fieldFromInstruction(Insn, 4, 2);
2483 if (type == 8 && align == 3) return MCDisassembler::Fail;
2484 if (type == 9 && align == 3) return MCDisassembler::Fail;
2486 unsigned load = fieldFromInstruction(Insn, 21, 1);
2487 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
2488 : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
2491 static DecodeStatus DecodeVLDST3Instruction(MCInst &Inst, unsigned Insn,
2492 uint64_t Address, const void *Decoder) {
2493 unsigned size = fieldFromInstruction(Insn, 6, 2);
2494 if (size == 3) return MCDisassembler::Fail;
2496 unsigned align = fieldFromInstruction(Insn, 4, 2);
2497 if (align & 2) return MCDisassembler::Fail;
2499 unsigned load = fieldFromInstruction(Insn, 21, 1);
2500 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
2501 : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
2504 static DecodeStatus DecodeVLDST4Instruction(MCInst &Inst, unsigned Insn,
2505 uint64_t Address, const void *Decoder) {
2506 unsigned size = fieldFromInstruction(Insn, 6, 2);
2507 if (size == 3) return MCDisassembler::Fail;
2509 unsigned load = fieldFromInstruction(Insn, 21, 1);
2510 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
2511 : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
2514 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Insn,
2515 uint64_t Address, const void *Decoder) {
2516 DecodeStatus S = MCDisassembler::Success;
2518 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2519 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2520 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2521 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2522 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2523 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2525 // Writeback Operand
2526 switch (Inst.getOpcode()) {
2527 case ARM::VST1d8wb_fixed:
2528 case ARM::VST1d16wb_fixed:
2529 case ARM::VST1d32wb_fixed:
2530 case ARM::VST1d64wb_fixed:
2531 case ARM::VST1d8wb_register:
2532 case ARM::VST1d16wb_register:
2533 case ARM::VST1d32wb_register:
2534 case ARM::VST1d64wb_register:
2535 case ARM::VST1q8wb_fixed:
2536 case ARM::VST1q16wb_fixed:
2537 case ARM::VST1q32wb_fixed:
2538 case ARM::VST1q64wb_fixed:
2539 case ARM::VST1q8wb_register:
2540 case ARM::VST1q16wb_register:
2541 case ARM::VST1q32wb_register:
2542 case ARM::VST1q64wb_register:
2543 case ARM::VST1d8Twb_fixed:
2544 case ARM::VST1d16Twb_fixed:
2545 case ARM::VST1d32Twb_fixed:
2546 case ARM::VST1d64Twb_fixed:
2547 case ARM::VST1d8Twb_register:
2548 case ARM::VST1d16Twb_register:
2549 case ARM::VST1d32Twb_register:
2550 case ARM::VST1d64Twb_register:
2551 case ARM::VST1d8Qwb_fixed:
2552 case ARM::VST1d16Qwb_fixed:
2553 case ARM::VST1d32Qwb_fixed:
2554 case ARM::VST1d64Qwb_fixed:
2555 case ARM::VST1d8Qwb_register:
2556 case ARM::VST1d16Qwb_register:
2557 case ARM::VST1d32Qwb_register:
2558 case ARM::VST1d64Qwb_register:
2559 case ARM::VST2d8wb_fixed:
2560 case ARM::VST2d16wb_fixed:
2561 case ARM::VST2d32wb_fixed:
2562 case ARM::VST2d8wb_register:
2563 case ARM::VST2d16wb_register:
2564 case ARM::VST2d32wb_register:
2565 case ARM::VST2q8wb_fixed:
2566 case ARM::VST2q16wb_fixed:
2567 case ARM::VST2q32wb_fixed:
2568 case ARM::VST2q8wb_register:
2569 case ARM::VST2q16wb_register:
2570 case ARM::VST2q32wb_register:
2571 case ARM::VST2b8wb_fixed:
2572 case ARM::VST2b16wb_fixed:
2573 case ARM::VST2b32wb_fixed:
2574 case ARM::VST2b8wb_register:
2575 case ARM::VST2b16wb_register:
2576 case ARM::VST2b32wb_register:
2578 return MCDisassembler::Fail;
2579 Inst.addOperand(MCOperand::CreateImm(0));
2581 case ARM::VST3d8_UPD:
2582 case ARM::VST3d16_UPD:
2583 case ARM::VST3d32_UPD:
2584 case ARM::VST3q8_UPD:
2585 case ARM::VST3q16_UPD:
2586 case ARM::VST3q32_UPD:
2587 case ARM::VST4d8_UPD:
2588 case ARM::VST4d16_UPD:
2589 case ARM::VST4d32_UPD:
2590 case ARM::VST4q8_UPD:
2591 case ARM::VST4q16_UPD:
2592 case ARM::VST4q32_UPD:
2593 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2594 return MCDisassembler::Fail;
2600 // AddrMode6 Base (register+alignment)
2601 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2602 return MCDisassembler::Fail;
2604 // AddrMode6 Offset (register)
2605 switch (Inst.getOpcode()) {
2608 Inst.addOperand(MCOperand::CreateReg(0));
2609 else if (Rm != 0xF) {
2610 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2611 return MCDisassembler::Fail;
2614 case ARM::VST1d8wb_fixed:
2615 case ARM::VST1d16wb_fixed:
2616 case ARM::VST1d32wb_fixed:
2617 case ARM::VST1d64wb_fixed:
2618 case ARM::VST1q8wb_fixed:
2619 case ARM::VST1q16wb_fixed:
2620 case ARM::VST1q32wb_fixed:
2621 case ARM::VST1q64wb_fixed:
2622 case ARM::VST1d8Twb_fixed:
2623 case ARM::VST1d16Twb_fixed:
2624 case ARM::VST1d32Twb_fixed:
2625 case ARM::VST1d64Twb_fixed:
2626 case ARM::VST1d8Qwb_fixed:
2627 case ARM::VST1d16Qwb_fixed:
2628 case ARM::VST1d32Qwb_fixed:
2629 case ARM::VST1d64Qwb_fixed:
2630 case ARM::VST2d8wb_fixed:
2631 case ARM::VST2d16wb_fixed:
2632 case ARM::VST2d32wb_fixed:
2633 case ARM::VST2q8wb_fixed:
2634 case ARM::VST2q16wb_fixed:
2635 case ARM::VST2q32wb_fixed:
2636 case ARM::VST2b8wb_fixed:
2637 case ARM::VST2b16wb_fixed:
2638 case ARM::VST2b32wb_fixed:
2643 // First input register
2644 switch (Inst.getOpcode()) {
2649 case ARM::VST1q16wb_fixed:
2650 case ARM::VST1q16wb_register:
2651 case ARM::VST1q32wb_fixed:
2652 case ARM::VST1q32wb_register:
2653 case ARM::VST1q64wb_fixed:
2654 case ARM::VST1q64wb_register:
2655 case ARM::VST1q8wb_fixed:
2656 case ARM::VST1q8wb_register:
2660 case ARM::VST2d16wb_fixed:
2661 case ARM::VST2d16wb_register:
2662 case ARM::VST2d32wb_fixed:
2663 case ARM::VST2d32wb_register:
2664 case ARM::VST2d8wb_fixed:
2665 case ARM::VST2d8wb_register:
2666 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2667 return MCDisassembler::Fail;
2672 case ARM::VST2b16wb_fixed:
2673 case ARM::VST2b16wb_register:
2674 case ARM::VST2b32wb_fixed:
2675 case ARM::VST2b32wb_register:
2676 case ARM::VST2b8wb_fixed:
2677 case ARM::VST2b8wb_register:
2678 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2679 return MCDisassembler::Fail;
2682 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2683 return MCDisassembler::Fail;
2686 // Second input register
2687 switch (Inst.getOpcode()) {
2691 case ARM::VST3d8_UPD:
2692 case ARM::VST3d16_UPD:
2693 case ARM::VST3d32_UPD:
2697 case ARM::VST4d8_UPD:
2698 case ARM::VST4d16_UPD:
2699 case ARM::VST4d32_UPD:
2700 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2701 return MCDisassembler::Fail;
2706 case ARM::VST3q8_UPD:
2707 case ARM::VST3q16_UPD:
2708 case ARM::VST3q32_UPD:
2712 case ARM::VST4q8_UPD:
2713 case ARM::VST4q16_UPD:
2714 case ARM::VST4q32_UPD:
2715 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2716 return MCDisassembler::Fail;
2722 // Third input register
2723 switch (Inst.getOpcode()) {
2727 case ARM::VST3d8_UPD:
2728 case ARM::VST3d16_UPD:
2729 case ARM::VST3d32_UPD:
2733 case ARM::VST4d8_UPD:
2734 case ARM::VST4d16_UPD:
2735 case ARM::VST4d32_UPD:
2736 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2737 return MCDisassembler::Fail;
2742 case ARM::VST3q8_UPD:
2743 case ARM::VST3q16_UPD:
2744 case ARM::VST3q32_UPD:
2748 case ARM::VST4q8_UPD:
2749 case ARM::VST4q16_UPD:
2750 case ARM::VST4q32_UPD:
2751 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2752 return MCDisassembler::Fail;
2758 // Fourth input register
2759 switch (Inst.getOpcode()) {
2763 case ARM::VST4d8_UPD:
2764 case ARM::VST4d16_UPD:
2765 case ARM::VST4d32_UPD:
2766 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2767 return MCDisassembler::Fail;
2772 case ARM::VST4q8_UPD:
2773 case ARM::VST4q16_UPD:
2774 case ARM::VST4q32_UPD:
2775 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2776 return MCDisassembler::Fail;
2785 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Insn,
2786 uint64_t Address, const void *Decoder) {
2787 DecodeStatus S = MCDisassembler::Success;
2789 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2790 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2791 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2792 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2793 unsigned align = fieldFromInstruction(Insn, 4, 1);
2794 unsigned size = fieldFromInstruction(Insn, 6, 2);
2796 if (size == 0 && align == 1)
2797 return MCDisassembler::Fail;
2798 align *= (1 << size);
2800 switch (Inst.getOpcode()) {
2801 case ARM::VLD1DUPq16: case ARM::VLD1DUPq32: case ARM::VLD1DUPq8:
2802 case ARM::VLD1DUPq16wb_fixed: case ARM::VLD1DUPq16wb_register:
2803 case ARM::VLD1DUPq32wb_fixed: case ARM::VLD1DUPq32wb_register:
2804 case ARM::VLD1DUPq8wb_fixed: case ARM::VLD1DUPq8wb_register:
2805 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2806 return MCDisassembler::Fail;
2809 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2810 return MCDisassembler::Fail;
2814 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2815 return MCDisassembler::Fail;
2818 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2819 return MCDisassembler::Fail;
2820 Inst.addOperand(MCOperand::CreateImm(align));
2822 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2823 // variant encodes Rm == 0xf. Anything else is a register offset post-
2824 // increment and we need to add the register operand to the instruction.
2825 if (Rm != 0xD && Rm != 0xF &&
2826 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2827 return MCDisassembler::Fail;
2832 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Insn,
2833 uint64_t Address, const void *Decoder) {
2834 DecodeStatus S = MCDisassembler::Success;
2836 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2837 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2838 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2839 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2840 unsigned align = fieldFromInstruction(Insn, 4, 1);
2841 unsigned size = 1 << fieldFromInstruction(Insn, 6, 2);
2844 switch (Inst.getOpcode()) {
2845 case ARM::VLD2DUPd16: case ARM::VLD2DUPd32: case ARM::VLD2DUPd8:
2846 case ARM::VLD2DUPd16wb_fixed: case ARM::VLD2DUPd16wb_register:
2847 case ARM::VLD2DUPd32wb_fixed: case ARM::VLD2DUPd32wb_register:
2848 case ARM::VLD2DUPd8wb_fixed: case ARM::VLD2DUPd8wb_register:
2849 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2850 return MCDisassembler::Fail;
2852 case ARM::VLD2DUPd16x2: case ARM::VLD2DUPd32x2: case ARM::VLD2DUPd8x2:
2853 case ARM::VLD2DUPd16x2wb_fixed: case ARM::VLD2DUPd16x2wb_register:
2854 case ARM::VLD2DUPd32x2wb_fixed: case ARM::VLD2DUPd32x2wb_register:
2855 case ARM::VLD2DUPd8x2wb_fixed: case ARM::VLD2DUPd8x2wb_register:
2856 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2857 return MCDisassembler::Fail;
2860 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2861 return MCDisassembler::Fail;
2866 Inst.addOperand(MCOperand::CreateImm(0));
2868 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2869 return MCDisassembler::Fail;
2870 Inst.addOperand(MCOperand::CreateImm(align));
2872 if (Rm != 0xD && Rm != 0xF) {
2873 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2874 return MCDisassembler::Fail;
2880 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Insn,
2881 uint64_t Address, const void *Decoder) {
2882 DecodeStatus S = MCDisassembler::Success;
2884 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2885 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2886 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2887 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2888 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
2890 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2891 return MCDisassembler::Fail;
2892 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2893 return MCDisassembler::Fail;
2894 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2895 return MCDisassembler::Fail;
2897 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2898 return MCDisassembler::Fail;
2901 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2902 return MCDisassembler::Fail;
2903 Inst.addOperand(MCOperand::CreateImm(0));
2906 Inst.addOperand(MCOperand::CreateReg(0));
2907 else if (Rm != 0xF) {
2908 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2909 return MCDisassembler::Fail;
2915 static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Insn,
2916 uint64_t Address, const void *Decoder) {
2917 DecodeStatus S = MCDisassembler::Success;
2919 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2920 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2921 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2922 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2923 unsigned size = fieldFromInstruction(Insn, 6, 2);
2924 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
2925 unsigned align = fieldFromInstruction(Insn, 4, 1);
2929 return MCDisassembler::Fail;
2942 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2943 return MCDisassembler::Fail;
2944 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2945 return MCDisassembler::Fail;
2946 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2947 return MCDisassembler::Fail;
2948 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
2949 return MCDisassembler::Fail;
2951 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2952 return MCDisassembler::Fail;
2955 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2956 return MCDisassembler::Fail;
2957 Inst.addOperand(MCOperand::CreateImm(align));
2960 Inst.addOperand(MCOperand::CreateReg(0));
2961 else if (Rm != 0xF) {
2962 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2963 return MCDisassembler::Fail;
2970 DecodeNEONModImmInstruction(MCInst &Inst, unsigned Insn,
2971 uint64_t Address, const void *Decoder) {
2972 DecodeStatus S = MCDisassembler::Success;
2974 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2975 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2976 unsigned imm = fieldFromInstruction(Insn, 0, 4);
2977 imm |= fieldFromInstruction(Insn, 16, 3) << 4;
2978 imm |= fieldFromInstruction(Insn, 24, 1) << 7;
2979 imm |= fieldFromInstruction(Insn, 8, 4) << 8;
2980 imm |= fieldFromInstruction(Insn, 5, 1) << 12;
2981 unsigned Q = fieldFromInstruction(Insn, 6, 1);
2984 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2985 return MCDisassembler::Fail;
2987 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2988 return MCDisassembler::Fail;
2991 Inst.addOperand(MCOperand::CreateImm(imm));
2993 switch (Inst.getOpcode()) {
2994 case ARM::VORRiv4i16:
2995 case ARM::VORRiv2i32:
2996 case ARM::VBICiv4i16:
2997 case ARM::VBICiv2i32:
2998 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2999 return MCDisassembler::Fail;
3001 case ARM::VORRiv8i16:
3002 case ARM::VORRiv4i32:
3003 case ARM::VBICiv8i16:
3004 case ARM::VBICiv4i32:
3005 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
3006 return MCDisassembler::Fail;
3015 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Insn,
3016 uint64_t Address, const void *Decoder) {
3017 DecodeStatus S = MCDisassembler::Success;
3019 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3020 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3021 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3022 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
3023 unsigned size = fieldFromInstruction(Insn, 18, 2);
3025 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
3026 return MCDisassembler::Fail;
3027 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
3028 return MCDisassembler::Fail;
3029 Inst.addOperand(MCOperand::CreateImm(8 << size));
3034 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
3035 uint64_t Address, const void *Decoder) {
3036 Inst.addOperand(MCOperand::CreateImm(8 - Val));
3037 return MCDisassembler::Success;
3040 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
3041 uint64_t Address, const void *Decoder) {
3042 Inst.addOperand(MCOperand::CreateImm(16 - Val));
3043 return MCDisassembler::Success;
3046 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
3047 uint64_t Address, const void *Decoder) {
3048 Inst.addOperand(MCOperand::CreateImm(32 - Val));
3049 return MCDisassembler::Success;
3052 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
3053 uint64_t Address, const void *Decoder) {
3054 Inst.addOperand(MCOperand::CreateImm(64 - Val));
3055 return MCDisassembler::Success;
3058 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
3059 uint64_t Address, const void *Decoder) {
3060 DecodeStatus S = MCDisassembler::Success;
3062 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3063 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3064 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3065 Rn |= fieldFromInstruction(Insn, 7, 1) << 4;
3066 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3067 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
3068 unsigned op = fieldFromInstruction(Insn, 6, 1);
3070 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3071 return MCDisassembler::Fail;
3073 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3074 return MCDisassembler::Fail; // Writeback
3077 switch (Inst.getOpcode()) {
3080 if (!Check(S, DecodeDPairRegisterClass(Inst, Rn, Address, Decoder)))
3081 return MCDisassembler::Fail;
3084 if (!Check(S, DecodeDPRRegisterClass(Inst, Rn, Address, Decoder)))
3085 return MCDisassembler::Fail;
3088 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
3089 return MCDisassembler::Fail;
3094 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
3095 uint64_t Address, const void *Decoder) {
3096 DecodeStatus S = MCDisassembler::Success;
3098 unsigned dst = fieldFromInstruction(Insn, 8, 3);
3099 unsigned imm = fieldFromInstruction(Insn, 0, 8);
3101 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
3102 return MCDisassembler::Fail;
3104 switch(Inst.getOpcode()) {
3106 return MCDisassembler::Fail;
3108 break; // tADR does not explicitly represent the PC as an operand.
3110 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3114 Inst.addOperand(MCOperand::CreateImm(imm));
3118 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
3119 uint64_t Address, const void *Decoder) {
3120 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<12>(Val<<1) + 4,
3121 true, 2, Inst, Decoder))
3122 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
3123 return MCDisassembler::Success;
3126 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
3127 uint64_t Address, const void *Decoder) {
3128 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<21>(Val) + 4,
3129 true, 4, Inst, Decoder))
3130 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
3131 return MCDisassembler::Success;
3134 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
3135 uint64_t Address, const void *Decoder) {
3136 if (!tryAddingSymbolicOperand(Address, Address + (Val<<1) + 4,
3137 true, 2, Inst, Decoder))
3138 Inst.addOperand(MCOperand::CreateImm(Val << 1));
3139 return MCDisassembler::Success;
3142 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
3143 uint64_t Address, const void *Decoder) {
3144 DecodeStatus S = MCDisassembler::Success;
3146 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3147 unsigned Rm = fieldFromInstruction(Val, 3, 3);
3149 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3150 return MCDisassembler::Fail;
3151 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
3152 return MCDisassembler::Fail;
3157 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
3158 uint64_t Address, const void *Decoder) {
3159 DecodeStatus S = MCDisassembler::Success;
3161 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3162 unsigned imm = fieldFromInstruction(Val, 3, 5);
3164 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3165 return MCDisassembler::Fail;
3166 Inst.addOperand(MCOperand::CreateImm(imm));
3171 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
3172 uint64_t Address, const void *Decoder) {
3173 unsigned imm = Val << 2;
3175 Inst.addOperand(MCOperand::CreateImm(imm));
3176 tryAddingPcLoadReferenceComment(Address, (Address & ~2u) + imm + 4, Decoder);
3178 return MCDisassembler::Success;
3181 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
3182 uint64_t Address, const void *Decoder) {
3183 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3184 Inst.addOperand(MCOperand::CreateImm(Val));
3186 return MCDisassembler::Success;
3189 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
3190 uint64_t Address, const void *Decoder) {
3191 DecodeStatus S = MCDisassembler::Success;
3193 unsigned Rn = fieldFromInstruction(Val, 6, 4);
3194 unsigned Rm = fieldFromInstruction(Val, 2, 4);
3195 unsigned imm = fieldFromInstruction(Val, 0, 2);
3197 // Thumb stores cannot use PC as dest register.
3198 switch (Inst.getOpcode()) {
3203 return MCDisassembler::Fail;
3208 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3209 return MCDisassembler::Fail;
3210 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3211 return MCDisassembler::Fail;
3212 Inst.addOperand(MCOperand::CreateImm(imm));
3217 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Insn,
3218 uint64_t Address, const void *Decoder) {
3219 DecodeStatus S = MCDisassembler::Success;
3221 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3222 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3225 switch (Inst.getOpcode()) {
3227 Inst.setOpcode(ARM::t2LDRBpci);
3230 Inst.setOpcode(ARM::t2LDRHpci);
3233 Inst.setOpcode(ARM::t2LDRSHpci);
3236 Inst.setOpcode(ARM::t2LDRSBpci);
3239 Inst.setOpcode(ARM::t2LDRpci);
3242 Inst.setOpcode(ARM::t2PLDpci);
3245 Inst.setOpcode(ARM::t2PLIpci);
3248 return MCDisassembler::Fail;
3251 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3255 switch (Inst.getOpcode()) {
3257 return MCDisassembler::Fail;
3259 // FIXME: this instruction is only available with MP extensions,
3260 // this should be checked first but we don't have access to the
3261 // feature bits here.
3262 Inst.setOpcode(ARM::t2PLDWs);
3269 switch (Inst.getOpcode()) {
3275 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3276 return MCDisassembler::Fail;
3279 unsigned addrmode = fieldFromInstruction(Insn, 4, 2);
3280 addrmode |= fieldFromInstruction(Insn, 0, 4) << 2;
3281 addrmode |= fieldFromInstruction(Insn, 16, 4) << 6;
3282 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
3283 return MCDisassembler::Fail;
3288 static DecodeStatus DecodeT2LoadImm8(MCInst &Inst, unsigned Insn,
3289 uint64_t Address, const void* Decoder) {
3290 DecodeStatus S = MCDisassembler::Success;
3292 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3293 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3294 unsigned U = fieldFromInstruction(Insn, 9, 1);
3295 unsigned imm = fieldFromInstruction(Insn, 0, 8);
3300 switch (Inst.getOpcode()) {
3302 Inst.setOpcode(ARM::t2LDRpci);
3305 Inst.setOpcode(ARM::t2LDRBpci);
3307 case ARM::t2LDRSBi8:
3308 Inst.setOpcode(ARM::t2LDRSBpci);
3311 Inst.setOpcode(ARM::t2LDRHpci);
3313 case ARM::t2LDRSHi8:
3314 Inst.setOpcode(ARM::t2LDRSHpci);
3317 Inst.setOpcode(ARM::t2PLDpci);
3320 Inst.setOpcode(ARM::t2PLIpci);
3323 return MCDisassembler::Fail;
3325 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3329 switch (Inst.getOpcode()) {
3330 case ARM::t2LDRSHi8:
3331 return MCDisassembler::Fail;
3337 switch (Inst.getOpcode()) {
3342 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3343 return MCDisassembler::Fail;
3346 if (!Check(S, DecodeT2AddrModeImm8(Inst, imm, Address, Decoder)))
3347 return MCDisassembler::Fail;
3351 static DecodeStatus DecodeT2LoadImm12(MCInst &Inst, unsigned Insn,
3352 uint64_t Address, const void* Decoder) {
3353 DecodeStatus S = MCDisassembler::Success;
3355 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3356 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3357 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3361 switch (Inst.getOpcode()) {
3363 Inst.setOpcode(ARM::t2LDRpci);
3365 case ARM::t2LDRHi12:
3366 Inst.setOpcode(ARM::t2LDRHpci);
3368 case ARM::t2LDRSHi12:
3369 Inst.setOpcode(ARM::t2LDRSHpci);
3371 case ARM::t2LDRBi12:
3372 Inst.setOpcode(ARM::t2LDRBpci);
3374 case ARM::t2LDRSBi12:
3375 Inst.setOpcode(ARM::t2LDRSBpci);
3378 Inst.setOpcode(ARM::t2PLDpci);
3381 Inst.setOpcode(ARM::t2PLIpci);
3384 return MCDisassembler::Fail;
3386 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3390 switch (Inst.getOpcode()) {
3391 case ARM::t2LDRSHi12:
3392 return MCDisassembler::Fail;
3393 case ARM::t2LDRHi12:
3394 Inst.setOpcode(ARM::t2PLDi12);
3401 switch (Inst.getOpcode()) {
3406 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3407 return MCDisassembler::Fail;
3410 if (!Check(S, DecodeT2AddrModeImm12(Inst, imm, Address, Decoder)))
3411 return MCDisassembler::Fail;
3415 static DecodeStatus DecodeT2LoadT(MCInst &Inst, unsigned Insn,
3416 uint64_t Address, const void* Decoder) {
3417 DecodeStatus S = MCDisassembler::Success;
3419 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3420 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3421 unsigned imm = fieldFromInstruction(Insn, 0, 8);
3425 switch (Inst.getOpcode()) {
3427 Inst.setOpcode(ARM::t2LDRpci);
3430 Inst.setOpcode(ARM::t2LDRBpci);
3433 Inst.setOpcode(ARM::t2LDRHpci);
3436 Inst.setOpcode(ARM::t2LDRSBpci);
3439 Inst.setOpcode(ARM::t2LDRSHpci);
3442 return MCDisassembler::Fail;
3444 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3447 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3448 return MCDisassembler::Fail;
3449 if (!Check(S, DecodeT2AddrModeImm8(Inst, imm, Address, Decoder)))
3450 return MCDisassembler::Fail;
3454 static DecodeStatus DecodeT2LoadLabel(MCInst &Inst, unsigned Insn,
3455 uint64_t Address, const void* Decoder) {
3456 DecodeStatus S = MCDisassembler::Success;
3458 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3459 unsigned U = fieldFromInstruction(Insn, 23, 1);
3460 int imm = fieldFromInstruction(Insn, 0, 12);
3463 switch (Inst.getOpcode()) {
3464 case ARM::t2LDRBpci:
3465 case ARM::t2LDRHpci:
3466 Inst.setOpcode(ARM::t2PLDpci);
3468 case ARM::t2LDRSBpci:
3469 Inst.setOpcode(ARM::t2PLIpci);
3471 case ARM::t2LDRSHpci:
3472 return MCDisassembler::Fail;
3478 switch(Inst.getOpcode()) {
3483 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3484 return MCDisassembler::Fail;
3488 // Special case for #-0.
3494 Inst.addOperand(MCOperand::CreateImm(imm));
3499 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
3500 uint64_t Address, const void *Decoder) {
3502 Inst.addOperand(MCOperand::CreateImm(INT32_MIN));
3504 int imm = Val & 0xFF;
3506 if (!(Val & 0x100)) imm *= -1;
3507 Inst.addOperand(MCOperand::CreateImm(imm * 4));
3510 return MCDisassembler::Success;
3513 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
3514 uint64_t Address, const void *Decoder) {
3515 DecodeStatus S = MCDisassembler::Success;
3517 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3518 unsigned imm = fieldFromInstruction(Val, 0, 9);
3520 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3521 return MCDisassembler::Fail;
3522 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
3523 return MCDisassembler::Fail;
3528 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
3529 uint64_t Address, const void *Decoder) {
3530 DecodeStatus S = MCDisassembler::Success;
3532 unsigned Rn = fieldFromInstruction(Val, 8, 4);
3533 unsigned imm = fieldFromInstruction(Val, 0, 8);
3535 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
3536 return MCDisassembler::Fail;
3538 Inst.addOperand(MCOperand::CreateImm(imm));
3543 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
3544 uint64_t Address, const void *Decoder) {
3545 int imm = Val & 0xFF;
3548 else if (!(Val & 0x100))
3550 Inst.addOperand(MCOperand::CreateImm(imm));
3552 return MCDisassembler::Success;
3556 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
3557 uint64_t Address, const void *Decoder) {
3558 DecodeStatus S = MCDisassembler::Success;
3560 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3561 unsigned imm = fieldFromInstruction(Val, 0, 9);
3563 // Thumb stores cannot use PC as dest register.
3564 switch (Inst.getOpcode()) {
3572 return MCDisassembler::Fail;
3578 // Some instructions always use an additive offset.
3579 switch (Inst.getOpcode()) {
3594 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3595 return MCDisassembler::Fail;
3596 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
3597 return MCDisassembler::Fail;
3602 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Insn,
3603 uint64_t Address, const void *Decoder) {
3604 DecodeStatus S = MCDisassembler::Success;
3606 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3607 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3608 unsigned addr = fieldFromInstruction(Insn, 0, 8);
3609 addr |= fieldFromInstruction(Insn, 9, 1) << 8;
3611 unsigned load = fieldFromInstruction(Insn, 20, 1);
3614 switch (Inst.getOpcode()) {
3615 case ARM::t2LDR_PRE:
3616 case ARM::t2LDR_POST:
3617 Inst.setOpcode(ARM::t2LDRpci);
3619 case ARM::t2LDRB_PRE:
3620 case ARM::t2LDRB_POST:
3621 Inst.setOpcode(ARM::t2LDRBpci);
3623 case ARM::t2LDRH_PRE:
3624 case ARM::t2LDRH_POST:
3625 Inst.setOpcode(ARM::t2LDRHpci);
3627 case ARM::t2LDRSB_PRE:
3628 case ARM::t2LDRSB_POST:
3630 Inst.setOpcode(ARM::t2PLIpci);
3632 Inst.setOpcode(ARM::t2LDRSBpci);
3634 case ARM::t2LDRSH_PRE:
3635 case ARM::t2LDRSH_POST:
3636 Inst.setOpcode(ARM::t2LDRSHpci);
3639 return MCDisassembler::Fail;
3641 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3645 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3646 return MCDisassembler::Fail;
3649 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3650 return MCDisassembler::Fail;
3653 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3654 return MCDisassembler::Fail;
3657 if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
3658 return MCDisassembler::Fail;
3663 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
3664 uint64_t Address, const void *Decoder) {
3665 DecodeStatus S = MCDisassembler::Success;
3667 unsigned Rn = fieldFromInstruction(Val, 13, 4);
3668 unsigned imm = fieldFromInstruction(Val, 0, 12);
3670 // Thumb stores cannot use PC as dest register.
3671 switch (Inst.getOpcode()) {
3673 case ARM::t2STRBi12:
3674 case ARM::t2STRHi12:
3676 return MCDisassembler::Fail;
3681 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3682 return MCDisassembler::Fail;
3683 Inst.addOperand(MCOperand::CreateImm(imm));
3689 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Insn,
3690 uint64_t Address, const void *Decoder) {
3691 unsigned imm = fieldFromInstruction(Insn, 0, 7);
3693 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3694 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3695 Inst.addOperand(MCOperand::CreateImm(imm));
3697 return MCDisassembler::Success;
3700 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
3701 uint64_t Address, const void *Decoder) {
3702 DecodeStatus S = MCDisassembler::Success;
3704 if (Inst.getOpcode() == ARM::tADDrSP) {
3705 unsigned Rdm = fieldFromInstruction(Insn, 0, 3);
3706 Rdm |= fieldFromInstruction(Insn, 7, 1) << 3;
3708 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3709 return MCDisassembler::Fail;
3710 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3711 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3712 return MCDisassembler::Fail;
3713 } else if (Inst.getOpcode() == ARM::tADDspr) {
3714 unsigned Rm = fieldFromInstruction(Insn, 3, 4);
3716 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3717 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3718 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3719 return MCDisassembler::Fail;
3725 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
3726 uint64_t Address, const void *Decoder) {
3727 unsigned imod = fieldFromInstruction(Insn, 4, 1) | 0x2;
3728 unsigned flags = fieldFromInstruction(Insn, 0, 3);
3730 Inst.addOperand(MCOperand::CreateImm(imod));
3731 Inst.addOperand(MCOperand::CreateImm(flags));
3733 return MCDisassembler::Success;
3736 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
3737 uint64_t Address, const void *Decoder) {
3738 DecodeStatus S = MCDisassembler::Success;
3739 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3740 unsigned add = fieldFromInstruction(Insn, 4, 1);
3742 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
3743 return MCDisassembler::Fail;
3744 Inst.addOperand(MCOperand::CreateImm(add));
3749 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Val,
3750 uint64_t Address, const void *Decoder) {
3751 // Val is passed in as S:J1:J2:imm10H:imm10L:'0'
3752 // Note only one trailing zero not two. Also the J1 and J2 values are from
3753 // the encoded instruction. So here change to I1 and I2 values via:
3754 // I1 = NOT(J1 EOR S);
3755 // I2 = NOT(J2 EOR S);
3756 // and build the imm32 with two trailing zeros as documented:
3757 // imm32 = SignExtend(S:I1:I2:imm10H:imm10L:'00', 32);
3758 unsigned S = (Val >> 23) & 1;
3759 unsigned J1 = (Val >> 22) & 1;
3760 unsigned J2 = (Val >> 21) & 1;
3761 unsigned I1 = !(J1 ^ S);
3762 unsigned I2 = !(J2 ^ S);
3763 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
3764 int imm32 = SignExtend32<25>(tmp << 1);
3766 if (!tryAddingSymbolicOperand(Address,
3767 (Address & ~2u) + imm32 + 4,
3768 true, 4, Inst, Decoder))
3769 Inst.addOperand(MCOperand::CreateImm(imm32));
3770 return MCDisassembler::Success;
3773 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Val,
3774 uint64_t Address, const void *Decoder) {
3775 if (Val == 0xA || Val == 0xB)
3776 return MCDisassembler::Fail;
3778 Inst.addOperand(MCOperand::CreateImm(Val));
3779 return MCDisassembler::Success;
3783 DecodeThumbTableBranch(MCInst &Inst, unsigned Insn,
3784 uint64_t Address, const void *Decoder) {
3785 DecodeStatus S = MCDisassembler::Success;
3787 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3788 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3790 if (Rn == ARM::SP) S = MCDisassembler::SoftFail;
3791 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3792 return MCDisassembler::Fail;
3793 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3794 return MCDisassembler::Fail;
3799 DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Insn,
3800 uint64_t Address, const void *Decoder) {
3801 DecodeStatus S = MCDisassembler::Success;
3803 unsigned pred = fieldFromInstruction(Insn, 22, 4);
3804 if (pred == 0xE || pred == 0xF) {
3805 unsigned opc = fieldFromInstruction(Insn, 4, 28);
3808 return MCDisassembler::Fail;
3810 Inst.setOpcode(ARM::t2DSB);
3813 Inst.setOpcode(ARM::t2DMB);
3816 Inst.setOpcode(ARM::t2ISB);
3820 unsigned imm = fieldFromInstruction(Insn, 0, 4);
3821 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
3824 unsigned brtarget = fieldFromInstruction(Insn, 0, 11) << 1;
3825 brtarget |= fieldFromInstruction(Insn, 11, 1) << 19;
3826 brtarget |= fieldFromInstruction(Insn, 13, 1) << 18;
3827 brtarget |= fieldFromInstruction(Insn, 16, 6) << 12;
3828 brtarget |= fieldFromInstruction(Insn, 26, 1) << 20;
3830 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
3831 return MCDisassembler::Fail;
3832 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3833 return MCDisassembler::Fail;
3838 // Decode a shifted immediate operand. These basically consist
3839 // of an 8-bit value, and a 4-bit directive that specifies either
3840 // a splat operation or a rotation.
3841 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
3842 uint64_t Address, const void *Decoder) {
3843 unsigned ctrl = fieldFromInstruction(Val, 10, 2);
3845 unsigned byte = fieldFromInstruction(Val, 8, 2);
3846 unsigned imm = fieldFromInstruction(Val, 0, 8);
3849 Inst.addOperand(MCOperand::CreateImm(imm));
3852 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
3855 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
3858 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
3863 unsigned unrot = fieldFromInstruction(Val, 0, 7) | 0x80;
3864 unsigned rot = fieldFromInstruction(Val, 7, 5);
3865 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
3866 Inst.addOperand(MCOperand::CreateImm(imm));
3869 return MCDisassembler::Success;
3873 DecodeThumbBCCTargetOperand(MCInst &Inst, unsigned Val,
3874 uint64_t Address, const void *Decoder){
3875 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<9>(Val<<1) + 4,
3876 true, 2, Inst, Decoder))
3877 Inst.addOperand(MCOperand::CreateImm(SignExtend32<9>(Val << 1)));
3878 return MCDisassembler::Success;
3881 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
3882 uint64_t Address, const void *Decoder){
3883 // Val is passed in as S:J1:J2:imm10:imm11
3884 // Note no trailing zero after imm11. Also the J1 and J2 values are from
3885 // the encoded instruction. So here change to I1 and I2 values via:
3886 // I1 = NOT(J1 EOR S);
3887 // I2 = NOT(J2 EOR S);
3888 // and build the imm32 with one trailing zero as documented:
3889 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
3890 unsigned S = (Val >> 23) & 1;
3891 unsigned J1 = (Val >> 22) & 1;
3892 unsigned J2 = (Val >> 21) & 1;
3893 unsigned I1 = !(J1 ^ S);
3894 unsigned I2 = !(J2 ^ S);
3895 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
3896 int imm32 = SignExtend32<25>(tmp << 1);
3898 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
3899 true, 4, Inst, Decoder))
3900 Inst.addOperand(MCOperand::CreateImm(imm32));
3901 return MCDisassembler::Success;
3904 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Val,
3905 uint64_t Address, const void *Decoder) {
3907 return MCDisassembler::Fail;
3909 Inst.addOperand(MCOperand::CreateImm(Val));
3910 return MCDisassembler::Success;
3913 static DecodeStatus DecodeInstSyncBarrierOption(MCInst &Inst, unsigned Val,
3914 uint64_t Address, const void *Decoder) {
3916 return MCDisassembler::Fail;
3918 Inst.addOperand(MCOperand::CreateImm(Val));
3919 return MCDisassembler::Success;
3922 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Val,
3923 uint64_t Address, const void *Decoder) {
3924 if (!Val) return MCDisassembler::Fail;
3925 Inst.addOperand(MCOperand::CreateImm(Val));
3926 return MCDisassembler::Success;
3929 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
3930 uint64_t Address, const void *Decoder) {
3931 DecodeStatus S = MCDisassembler::Success;
3933 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3934 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3935 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3938 S = MCDisassembler::SoftFail;
3940 if (!Check(S, DecodeGPRPairRegisterClass(Inst, Rt, Address, Decoder)))
3941 return MCDisassembler::Fail;
3942 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3943 return MCDisassembler::Fail;
3944 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3945 return MCDisassembler::Fail;
3950 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
3951 uint64_t Address, const void *Decoder){
3952 DecodeStatus S = MCDisassembler::Success;
3954 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3955 unsigned Rt = fieldFromInstruction(Insn, 0, 4);
3956 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3957 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3959 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
3960 return MCDisassembler::Fail;
3962 if (Rn == 0xF || Rd == Rn || Rd == Rt || Rd == Rt+1)
3963 S = MCDisassembler::SoftFail;
3965 if (!Check(S, DecodeGPRPairRegisterClass(Inst, Rt, Address, Decoder)))
3966 return MCDisassembler::Fail;
3967 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3968 return MCDisassembler::Fail;
3969 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3970 return MCDisassembler::Fail;
3975 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
3976 uint64_t Address, const void *Decoder) {
3977 DecodeStatus S = MCDisassembler::Success;
3979 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3980 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3981 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3982 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
3983 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
3984 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3986 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3988 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3989 return MCDisassembler::Fail;
3990 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3991 return MCDisassembler::Fail;
3992 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3993 return MCDisassembler::Fail;
3994 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3995 return MCDisassembler::Fail;
4000 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
4001 uint64_t Address, const void *Decoder) {
4002 DecodeStatus S = MCDisassembler::Success;
4004 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4005 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4006 unsigned imm = fieldFromInstruction(Insn, 0, 12);
4007 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
4008 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
4009 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4010 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4012 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
4013 if (Rm == 0xF) S = MCDisassembler::SoftFail;
4015 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
4016 return MCDisassembler::Fail;
4017 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4018 return MCDisassembler::Fail;
4019 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
4020 return MCDisassembler::Fail;
4021 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4022 return MCDisassembler::Fail;
4028 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
4029 uint64_t Address, const void *Decoder) {
4030 DecodeStatus S = MCDisassembler::Success;
4032 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4033 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4034 unsigned imm = fieldFromInstruction(Insn, 0, 12);
4035 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
4036 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
4037 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4039 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
4041 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4042 return MCDisassembler::Fail;
4043 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
4044 return MCDisassembler::Fail;
4045 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
4046 return MCDisassembler::Fail;
4047 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4048 return MCDisassembler::Fail;
4053 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
4054 uint64_t Address, const void *Decoder) {
4055 DecodeStatus S = MCDisassembler::Success;
4057 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4058 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4059 unsigned imm = fieldFromInstruction(Insn, 0, 12);
4060 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
4061 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
4062 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4064 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
4066 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4067 return MCDisassembler::Fail;
4068 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
4069 return MCDisassembler::Fail;
4070 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
4071 return MCDisassembler::Fail;
4072 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4073 return MCDisassembler::Fail;
4078 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
4079 uint64_t Address, const void *Decoder) {
4080 DecodeStatus S = MCDisassembler::Success;
4082 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4083 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4084 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4085 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4086 unsigned size = fieldFromInstruction(Insn, 10, 2);
4092 return MCDisassembler::Fail;
4094 if (fieldFromInstruction(Insn, 4, 1))
4095 return MCDisassembler::Fail; // UNDEFINED
4096 index = fieldFromInstruction(Insn, 5, 3);
4099 if (fieldFromInstruction(Insn, 5, 1))
4100 return MCDisassembler::Fail; // UNDEFINED
4101 index = fieldFromInstruction(Insn, 6, 2);
4102 if (fieldFromInstruction(Insn, 4, 1))
4106 if (fieldFromInstruction(Insn, 6, 1))
4107 return MCDisassembler::Fail; // UNDEFINED
4108 index = fieldFromInstruction(Insn, 7, 1);
4110 switch (fieldFromInstruction(Insn, 4, 2)) {
4116 return MCDisassembler::Fail;
4121 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4122 return MCDisassembler::Fail;
4123 if (Rm != 0xF) { // Writeback
4124 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4125 return MCDisassembler::Fail;
4127 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4128 return MCDisassembler::Fail;
4129 Inst.addOperand(MCOperand::CreateImm(align));
4132 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4133 return MCDisassembler::Fail;
4135 Inst.addOperand(MCOperand::CreateReg(0));
4138 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4139 return MCDisassembler::Fail;
4140 Inst.addOperand(MCOperand::CreateImm(index));
4145 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
4146 uint64_t Address, const void *Decoder) {
4147 DecodeStatus S = MCDisassembler::Success;
4149 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4150 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4151 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4152 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4153 unsigned size = fieldFromInstruction(Insn, 10, 2);
4159 return MCDisassembler::Fail;
4161 if (fieldFromInstruction(Insn, 4, 1))
4162 return MCDisassembler::Fail; // UNDEFINED
4163 index = fieldFromInstruction(Insn, 5, 3);
4166 if (fieldFromInstruction(Insn, 5, 1))
4167 return MCDisassembler::Fail; // UNDEFINED
4168 index = fieldFromInstruction(Insn, 6, 2);
4169 if (fieldFromInstruction(Insn, 4, 1))
4173 if (fieldFromInstruction(Insn, 6, 1))
4174 return MCDisassembler::Fail; // UNDEFINED
4175 index = fieldFromInstruction(Insn, 7, 1);
4177 switch (fieldFromInstruction(Insn, 4, 2)) {
4183 return MCDisassembler::Fail;
4188 if (Rm != 0xF) { // Writeback
4189 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4190 return MCDisassembler::Fail;
4192 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4193 return MCDisassembler::Fail;
4194 Inst.addOperand(MCOperand::CreateImm(align));
4197 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4198 return MCDisassembler::Fail;
4200 Inst.addOperand(MCOperand::CreateReg(0));
4203 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4204 return MCDisassembler::Fail;
4205 Inst.addOperand(MCOperand::CreateImm(index));
4211 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
4212 uint64_t Address, const void *Decoder) {
4213 DecodeStatus S = MCDisassembler::Success;
4215 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4216 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4217 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4218 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4219 unsigned size = fieldFromInstruction(Insn, 10, 2);
4226 return MCDisassembler::Fail;
4228 index = fieldFromInstruction(Insn, 5, 3);
4229 if (fieldFromInstruction(Insn, 4, 1))
4233 index = fieldFromInstruction(Insn, 6, 2);
4234 if (fieldFromInstruction(Insn, 4, 1))
4236 if (fieldFromInstruction(Insn, 5, 1))
4240 if (fieldFromInstruction(Insn, 5, 1))
4241 return MCDisassembler::Fail; // UNDEFINED
4242 index = fieldFromInstruction(Insn, 7, 1);
4243 if (fieldFromInstruction(Insn, 4, 1) != 0)
4245 if (fieldFromInstruction(Insn, 6, 1))
4250 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4251 return MCDisassembler::Fail;
4252 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4253 return MCDisassembler::Fail;
4254 if (Rm != 0xF) { // Writeback
4255 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4256 return MCDisassembler::Fail;
4258 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4259 return MCDisassembler::Fail;
4260 Inst.addOperand(MCOperand::CreateImm(align));
4263 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4264 return MCDisassembler::Fail;
4266 Inst.addOperand(MCOperand::CreateReg(0));
4269 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4270 return MCDisassembler::Fail;
4271 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4272 return MCDisassembler::Fail;
4273 Inst.addOperand(MCOperand::CreateImm(index));
4278 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
4279 uint64_t Address, const void *Decoder) {
4280 DecodeStatus S = MCDisassembler::Success;
4282 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4283 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4284 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4285 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4286 unsigned size = fieldFromInstruction(Insn, 10, 2);
4293 return MCDisassembler::Fail;
4295 index = fieldFromInstruction(Insn, 5, 3);
4296 if (fieldFromInstruction(Insn, 4, 1))
4300 index = fieldFromInstruction(Insn, 6, 2);
4301 if (fieldFromInstruction(Insn, 4, 1))
4303 if (fieldFromInstruction(Insn, 5, 1))
4307 if (fieldFromInstruction(Insn, 5, 1))
4308 return MCDisassembler::Fail; // UNDEFINED
4309 index = fieldFromInstruction(Insn, 7, 1);
4310 if (fieldFromInstruction(Insn, 4, 1) != 0)
4312 if (fieldFromInstruction(Insn, 6, 1))
4317 if (Rm != 0xF) { // Writeback
4318 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4319 return MCDisassembler::Fail;
4321 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4322 return MCDisassembler::Fail;
4323 Inst.addOperand(MCOperand::CreateImm(align));
4326 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4327 return MCDisassembler::Fail;
4329 Inst.addOperand(MCOperand::CreateReg(0));
4332 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4333 return MCDisassembler::Fail;
4334 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4335 return MCDisassembler::Fail;
4336 Inst.addOperand(MCOperand::CreateImm(index));
4342 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
4343 uint64_t Address, const void *Decoder) {
4344 DecodeStatus S = MCDisassembler::Success;
4346 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4347 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4348 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4349 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4350 unsigned size = fieldFromInstruction(Insn, 10, 2);
4357 return MCDisassembler::Fail;
4359 if (fieldFromInstruction(Insn, 4, 1))
4360 return MCDisassembler::Fail; // UNDEFINED
4361 index = fieldFromInstruction(Insn, 5, 3);
4364 if (fieldFromInstruction(Insn, 4, 1))
4365 return MCDisassembler::Fail; // UNDEFINED
4366 index = fieldFromInstruction(Insn, 6, 2);
4367 if (fieldFromInstruction(Insn, 5, 1))
4371 if (fieldFromInstruction(Insn, 4, 2))
4372 return MCDisassembler::Fail; // UNDEFINED
4373 index = fieldFromInstruction(Insn, 7, 1);
4374 if (fieldFromInstruction(Insn, 6, 1))
4379 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4380 return MCDisassembler::Fail;
4381 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4382 return MCDisassembler::Fail;
4383 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4384 return MCDisassembler::Fail;
4386 if (Rm != 0xF) { // Writeback
4387 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4388 return MCDisassembler::Fail;
4390 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4391 return MCDisassembler::Fail;
4392 Inst.addOperand(MCOperand::CreateImm(align));
4395 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4396 return MCDisassembler::Fail;
4398 Inst.addOperand(MCOperand::CreateReg(0));
4401 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4402 return MCDisassembler::Fail;
4403 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4404 return MCDisassembler::Fail;
4405 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4406 return MCDisassembler::Fail;
4407 Inst.addOperand(MCOperand::CreateImm(index));
4412 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
4413 uint64_t Address, const void *Decoder) {
4414 DecodeStatus S = MCDisassembler::Success;
4416 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4417 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4418 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4419 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4420 unsigned size = fieldFromInstruction(Insn, 10, 2);
4427 return MCDisassembler::Fail;
4429 if (fieldFromInstruction(Insn, 4, 1))
4430 return MCDisassembler::Fail; // UNDEFINED
4431 index = fieldFromInstruction(Insn, 5, 3);
4434 if (fieldFromInstruction(Insn, 4, 1))
4435 return MCDisassembler::Fail; // UNDEFINED
4436 index = fieldFromInstruction(Insn, 6, 2);
4437 if (fieldFromInstruction(Insn, 5, 1))
4441 if (fieldFromInstruction(Insn, 4, 2))
4442 return MCDisassembler::Fail; // UNDEFINED
4443 index = fieldFromInstruction(Insn, 7, 1);
4444 if (fieldFromInstruction(Insn, 6, 1))
4449 if (Rm != 0xF) { // Writeback
4450 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4451 return MCDisassembler::Fail;
4453 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4454 return MCDisassembler::Fail;
4455 Inst.addOperand(MCOperand::CreateImm(align));
4458 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4459 return MCDisassembler::Fail;
4461 Inst.addOperand(MCOperand::CreateReg(0));
4464 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4465 return MCDisassembler::Fail;
4466 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4467 return MCDisassembler::Fail;
4468 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4469 return MCDisassembler::Fail;
4470 Inst.addOperand(MCOperand::CreateImm(index));
4476 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
4477 uint64_t Address, const void *Decoder) {
4478 DecodeStatus S = MCDisassembler::Success;
4480 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4481 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4482 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4483 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4484 unsigned size = fieldFromInstruction(Insn, 10, 2);
4491 return MCDisassembler::Fail;
4493 if (fieldFromInstruction(Insn, 4, 1))
4495 index = fieldFromInstruction(Insn, 5, 3);
4498 if (fieldFromInstruction(Insn, 4, 1))
4500 index = fieldFromInstruction(Insn, 6, 2);
4501 if (fieldFromInstruction(Insn, 5, 1))
4505 switch (fieldFromInstruction(Insn, 4, 2)) {
4509 return MCDisassembler::Fail;
4511 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4514 index = fieldFromInstruction(Insn, 7, 1);
4515 if (fieldFromInstruction(Insn, 6, 1))
4520 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4521 return MCDisassembler::Fail;
4522 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4523 return MCDisassembler::Fail;
4524 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4525 return MCDisassembler::Fail;
4526 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4527 return MCDisassembler::Fail;
4529 if (Rm != 0xF) { // Writeback
4530 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4531 return MCDisassembler::Fail;
4533 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4534 return MCDisassembler::Fail;
4535 Inst.addOperand(MCOperand::CreateImm(align));
4538 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4539 return MCDisassembler::Fail;
4541 Inst.addOperand(MCOperand::CreateReg(0));
4544 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4545 return MCDisassembler::Fail;
4546 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4547 return MCDisassembler::Fail;
4548 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4549 return MCDisassembler::Fail;
4550 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4551 return MCDisassembler::Fail;
4552 Inst.addOperand(MCOperand::CreateImm(index));
4557 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
4558 uint64_t Address, const void *Decoder) {
4559 DecodeStatus S = MCDisassembler::Success;
4561 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4562 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4563 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4564 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4565 unsigned size = fieldFromInstruction(Insn, 10, 2);
4572 return MCDisassembler::Fail;
4574 if (fieldFromInstruction(Insn, 4, 1))
4576 index = fieldFromInstruction(Insn, 5, 3);
4579 if (fieldFromInstruction(Insn, 4, 1))
4581 index = fieldFromInstruction(Insn, 6, 2);
4582 if (fieldFromInstruction(Insn, 5, 1))
4586 switch (fieldFromInstruction(Insn, 4, 2)) {
4590 return MCDisassembler::Fail;
4592 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4595 index = fieldFromInstruction(Insn, 7, 1);
4596 if (fieldFromInstruction(Insn, 6, 1))
4601 if (Rm != 0xF) { // Writeback
4602 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4603 return MCDisassembler::Fail;
4605 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4606 return MCDisassembler::Fail;
4607 Inst.addOperand(MCOperand::CreateImm(align));
4610 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4611 return MCDisassembler::Fail;
4613 Inst.addOperand(MCOperand::CreateReg(0));
4616 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4617 return MCDisassembler::Fail;
4618 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4619 return MCDisassembler::Fail;
4620 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4621 return MCDisassembler::Fail;
4622 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4623 return MCDisassembler::Fail;
4624 Inst.addOperand(MCOperand::CreateImm(index));
4629 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
4630 uint64_t Address, const void *Decoder) {
4631 DecodeStatus S = MCDisassembler::Success;
4632 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4633 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4634 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4635 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4636 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4638 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4639 S = MCDisassembler::SoftFail;
4641 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4642 return MCDisassembler::Fail;
4643 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4644 return MCDisassembler::Fail;
4645 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4646 return MCDisassembler::Fail;
4647 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4648 return MCDisassembler::Fail;
4649 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4650 return MCDisassembler::Fail;
4655 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
4656 uint64_t Address, const void *Decoder) {
4657 DecodeStatus S = MCDisassembler::Success;
4658 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4659 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4660 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4661 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4662 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4664 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4665 S = MCDisassembler::SoftFail;
4667 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4668 return MCDisassembler::Fail;
4669 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4670 return MCDisassembler::Fail;
4671 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4672 return MCDisassembler::Fail;
4673 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4674 return MCDisassembler::Fail;
4675 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4676 return MCDisassembler::Fail;
4681 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Insn,
4682 uint64_t Address, const void *Decoder) {
4683 DecodeStatus S = MCDisassembler::Success;
4684 unsigned pred = fieldFromInstruction(Insn, 4, 4);
4685 unsigned mask = fieldFromInstruction(Insn, 0, 4);
4689 S = MCDisassembler::SoftFail;
4693 return MCDisassembler::Fail;
4695 Inst.addOperand(MCOperand::CreateImm(pred));
4696 Inst.addOperand(MCOperand::CreateImm(mask));
4701 DecodeT2LDRDPreInstruction(MCInst &Inst, unsigned Insn,
4702 uint64_t Address, const void *Decoder) {
4703 DecodeStatus S = MCDisassembler::Success;
4705 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4706 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
4707 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4708 unsigned addr = fieldFromInstruction(Insn, 0, 8);
4709 unsigned W = fieldFromInstruction(Insn, 21, 1);
4710 unsigned U = fieldFromInstruction(Insn, 23, 1);
4711 unsigned P = fieldFromInstruction(Insn, 24, 1);
4712 bool writeback = (W == 1) | (P == 0);
4714 addr |= (U << 8) | (Rn << 9);
4716 if (writeback && (Rn == Rt || Rn == Rt2))
4717 Check(S, MCDisassembler::SoftFail);
4719 Check(S, MCDisassembler::SoftFail);
4722 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4723 return MCDisassembler::Fail;
4725 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4726 return MCDisassembler::Fail;
4727 // Writeback operand
4728 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4729 return MCDisassembler::Fail;
4731 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4732 return MCDisassembler::Fail;
4738 DecodeT2STRDPreInstruction(MCInst &Inst, unsigned Insn,
4739 uint64_t Address, const void *Decoder) {
4740 DecodeStatus S = MCDisassembler::Success;
4742 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4743 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
4744 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4745 unsigned addr = fieldFromInstruction(Insn, 0, 8);
4746 unsigned W = fieldFromInstruction(Insn, 21, 1);
4747 unsigned U = fieldFromInstruction(Insn, 23, 1);
4748 unsigned P = fieldFromInstruction(Insn, 24, 1);
4749 bool writeback = (W == 1) | (P == 0);
4751 addr |= (U << 8) | (Rn << 9);
4753 if (writeback && (Rn == Rt || Rn == Rt2))
4754 Check(S, MCDisassembler::SoftFail);
4756 // Writeback operand
4757 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4758 return MCDisassembler::Fail;
4760 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4761 return MCDisassembler::Fail;
4763 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4764 return MCDisassembler::Fail;
4766 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4767 return MCDisassembler::Fail;
4772 static DecodeStatus DecodeT2Adr(MCInst &Inst, uint32_t Insn,
4773 uint64_t Address, const void *Decoder) {
4774 unsigned sign1 = fieldFromInstruction(Insn, 21, 1);
4775 unsigned sign2 = fieldFromInstruction(Insn, 23, 1);
4776 if (sign1 != sign2) return MCDisassembler::Fail;
4778 unsigned Val = fieldFromInstruction(Insn, 0, 8);
4779 Val |= fieldFromInstruction(Insn, 12, 3) << 8;
4780 Val |= fieldFromInstruction(Insn, 26, 1) << 11;
4782 Inst.addOperand(MCOperand::CreateImm(SignExtend32<13>(Val)));
4784 return MCDisassembler::Success;
4787 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, uint32_t Val,
4789 const void *Decoder) {
4790 DecodeStatus S = MCDisassembler::Success;
4792 // Shift of "asr #32" is not allowed in Thumb2 mode.
4793 if (Val == 0x20) S = MCDisassembler::SoftFail;
4794 Inst.addOperand(MCOperand::CreateImm(Val));
4798 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
4799 uint64_t Address, const void *Decoder) {
4800 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4801 unsigned Rt2 = fieldFromInstruction(Insn, 0, 4);
4802 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4803 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4806 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
4808 DecodeStatus S = MCDisassembler::Success;
4810 if (Rt == Rn || Rn == Rt2)
4811 S = MCDisassembler::SoftFail;
4813 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4814 return MCDisassembler::Fail;
4815 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
4816 return MCDisassembler::Fail;
4817 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4818 return MCDisassembler::Fail;
4819 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4820 return MCDisassembler::Fail;
4825 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
4826 uint64_t Address, const void *Decoder) {
4827 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
4828 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
4829 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
4830 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
4831 unsigned imm = fieldFromInstruction(Insn, 16, 6);
4832 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
4833 unsigned op = fieldFromInstruction(Insn, 5, 1);
4835 DecodeStatus S = MCDisassembler::Success;
4837 // VMOVv2f32 is ambiguous with these decodings.
4838 if (!(imm & 0x38) && cmode == 0xF) {
4839 if (op == 1) return MCDisassembler::Fail;
4840 Inst.setOpcode(ARM::VMOVv2f32);
4841 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4844 if (!(imm & 0x20)) return MCDisassembler::Fail;
4846 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
4847 return MCDisassembler::Fail;
4848 if (!Check(S, DecodeDPRRegisterClass(Inst, Vm, Address, Decoder)))
4849 return MCDisassembler::Fail;
4850 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4855 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
4856 uint64_t Address, const void *Decoder) {
4857 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
4858 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
4859 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
4860 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
4861 unsigned imm = fieldFromInstruction(Insn, 16, 6);
4862 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
4863 unsigned op = fieldFromInstruction(Insn, 5, 1);
4865 DecodeStatus S = MCDisassembler::Success;
4867 // VMOVv4f32 is ambiguous with these decodings.
4868 if (!(imm & 0x38) && cmode == 0xF) {
4869 if (op == 1) return MCDisassembler::Fail;
4870 Inst.setOpcode(ARM::VMOVv4f32);
4871 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4874 if (!(imm & 0x20)) return MCDisassembler::Fail;
4876 if (!Check(S, DecodeQPRRegisterClass(Inst, Vd, Address, Decoder)))
4877 return MCDisassembler::Fail;
4878 if (!Check(S, DecodeQPRRegisterClass(Inst, Vm, Address, Decoder)))
4879 return MCDisassembler::Fail;
4880 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4885 static DecodeStatus DecodeImm0_4(MCInst &Inst, unsigned Insn, uint64_t Address,
4886 const void *Decoder)
4888 unsigned Imm = fieldFromInstruction(Insn, 0, 3);
4889 if (Imm > 4) return MCDisassembler::Fail;
4890 Inst.addOperand(MCOperand::CreateImm(Imm));
4891 return MCDisassembler::Success;
4894 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
4895 uint64_t Address, const void *Decoder) {
4896 DecodeStatus S = MCDisassembler::Success;
4898 unsigned Rn = fieldFromInstruction(Val, 16, 4);
4899 unsigned Rt = fieldFromInstruction(Val, 12, 4);
4900 unsigned Rm = fieldFromInstruction(Val, 0, 4);
4901 Rm |= (fieldFromInstruction(Val, 23, 1) << 4);
4902 unsigned Cond = fieldFromInstruction(Val, 28, 4);
4904 if (fieldFromInstruction(Val, 8, 4) != 0 || Rn == Rt)
4905 S = MCDisassembler::SoftFail;
4907 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4908 return MCDisassembler::Fail;
4909 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4910 return MCDisassembler::Fail;
4911 if (!Check(S, DecodeAddrMode7Operand(Inst, Rn, Address, Decoder)))
4912 return MCDisassembler::Fail;
4913 if (!Check(S, DecodePostIdxReg(Inst, Rm, Address, Decoder)))
4914 return MCDisassembler::Fail;
4915 if (!Check(S, DecodePredicateOperand(Inst, Cond, Address, Decoder)))
4916 return MCDisassembler::Fail;
4921 static DecodeStatus DecodeMRRC2(llvm::MCInst &Inst, unsigned Val,
4922 uint64_t Address, const void *Decoder) {
4924 DecodeStatus S = MCDisassembler::Success;
4926 unsigned CRm = fieldFromInstruction(Val, 0, 4);
4927 unsigned opc1 = fieldFromInstruction(Val, 4, 4);
4928 unsigned cop = fieldFromInstruction(Val, 8, 4);
4929 unsigned Rt = fieldFromInstruction(Val, 12, 4);
4930 unsigned Rt2 = fieldFromInstruction(Val, 16, 4);
4932 if ((cop & ~0x1) == 0xa)
4933 return MCDisassembler::Fail;
4936 S = MCDisassembler::SoftFail;
4938 Inst.addOperand(MCOperand::CreateImm(cop));
4939 Inst.addOperand(MCOperand::CreateImm(opc1));
4940 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4941 return MCDisassembler::Fail;
4942 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
4943 return MCDisassembler::Fail;
4944 Inst.addOperand(MCOperand::CreateImm(CRm));