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);
328 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
329 uint64_t Address, const void *Decoder);
330 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
331 uint64_t Address, const void *Decoder);
332 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
333 uint64_t Address, const void *Decoder);
334 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
335 uint64_t Address, const void *Decoder);
336 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
337 uint64_t Address, const void *Decoder);
338 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
339 uint64_t Address, const void *Decoder);
340 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
341 uint64_t Address, const void *Decoder);
342 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
343 uint64_t Address, const void *Decoder);
344 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
345 uint64_t Address, const void *Decoder);
346 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Val,
347 uint64_t Address, const void *Decoder);
348 static DecodeStatus DecodeT2LoadImm8(MCInst &Inst, unsigned Insn,
349 uint64_t Address, const void* Decoder);
350 static DecodeStatus DecodeT2LoadImm12(MCInst &Inst, unsigned Insn,
351 uint64_t Address, const void* Decoder);
352 static DecodeStatus DecodeT2LoadT(MCInst &Inst, unsigned Insn,
353 uint64_t Address, const void* Decoder);
354 static DecodeStatus DecodeT2LoadLabel(MCInst &Inst, unsigned Insn,
355 uint64_t Address, const void* Decoder);
356 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
357 uint64_t Address, const void *Decoder);
358 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
359 uint64_t Address, const void *Decoder);
360 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
361 uint64_t Address, const void *Decoder);
362 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
363 uint64_t Address, const void *Decoder);
364 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
365 uint64_t Address, const void *Decoder);
366 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Val,
367 uint64_t Address, const void *Decoder);
368 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
369 uint64_t Address, const void *Decoder);
370 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
371 uint64_t Address, const void *Decoder);
372 static DecodeStatus DecodeQADDInstruction(MCInst &Inst, unsigned Insn,
373 uint64_t Address, const void *Decoder);
374 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Insn,
375 uint64_t Address, const void *Decoder);
376 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
377 uint64_t Address, const void *Decoder);
378 static DecodeStatus DecodeThumbTableBranch(MCInst &Inst, unsigned Val,
379 uint64_t Address, const void *Decoder);
380 static DecodeStatus DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Val,
381 uint64_t Address, const void *Decoder);
382 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
383 uint64_t Address, const void *Decoder);
384 static DecodeStatus DecodeThumbBCCTargetOperand(MCInst &Inst,unsigned Val,
385 uint64_t Address, const void *Decoder);
386 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
387 uint64_t Address, const void *Decoder);
388 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Val,
389 uint64_t Address, const void *Decoder);
390 static DecodeStatus DecodeT2LDRDPreInstruction(MCInst &Inst,unsigned Insn,
391 uint64_t Address, const void *Decoder);
392 static DecodeStatus DecodeT2STRDPreInstruction(MCInst &Inst,unsigned Insn,
393 uint64_t Address, const void *Decoder);
394 static DecodeStatus DecodeT2Adr(MCInst &Inst, unsigned Val,
395 uint64_t Address, const void *Decoder);
396 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Val,
397 uint64_t Address, const void *Decoder);
398 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, unsigned Val,
399 uint64_t Address, const void *Decoder);
401 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
402 uint64_t Address, const void *Decoder);
403 static DecodeStatus DecodeMRRC2(llvm::MCInst &Inst, unsigned Val,
404 uint64_t Address, const void *Decoder);
405 #include "ARMGenDisassemblerTables.inc"
407 static MCDisassembler *createARMDisassembler(const Target &T, const MCSubtargetInfo &STI) {
408 return new ARMDisassembler(STI);
411 static MCDisassembler *createThumbDisassembler(const Target &T, const MCSubtargetInfo &STI) {
412 return new ThumbDisassembler(STI);
415 DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
416 const MemoryObject &Region,
419 raw_ostream &cs) const {
424 assert(!(STI.getFeatureBits() & ARM::ModeThumb) &&
425 "Asked to disassemble an ARM instruction but Subtarget is in Thumb mode!");
427 // We want to read exactly 4 bytes of data.
428 if (Region.readBytes(Address, 4, bytes) == -1) {
430 return MCDisassembler::Fail;
433 // Encoded as a small-endian 32-bit word in the stream.
434 uint32_t insn = (bytes[3] << 24) |
439 // Calling the auto-generated decoder function.
440 DecodeStatus result = decodeInstruction(DecoderTableARM32, MI, insn,
442 if (result != MCDisassembler::Fail) {
447 // VFP and NEON instructions, similarly, are shared between ARM
450 result = decodeInstruction(DecoderTableVFP32, MI, insn, Address, this, STI);
451 if (result != MCDisassembler::Fail) {
457 result = decodeInstruction(DecoderTableVFPV832, MI, insn, Address, this, STI);
458 if (result != MCDisassembler::Fail) {
464 result = decodeInstruction(DecoderTableNEONData32, MI, insn, Address,
466 if (result != MCDisassembler::Fail) {
468 // Add a fake predicate operand, because we share these instruction
469 // definitions with Thumb2 where these instructions are predicable.
470 if (!DecodePredicateOperand(MI, 0xE, Address, this))
471 return MCDisassembler::Fail;
476 result = decodeInstruction(DecoderTableNEONLoadStore32, MI, insn, Address,
478 if (result != MCDisassembler::Fail) {
480 // Add a fake predicate operand, because we share these instruction
481 // definitions with Thumb2 where these instructions are predicable.
482 if (!DecodePredicateOperand(MI, 0xE, Address, this))
483 return MCDisassembler::Fail;
488 result = decodeInstruction(DecoderTableNEONDup32, MI, insn, Address,
490 if (result != MCDisassembler::Fail) {
492 // Add a fake predicate operand, because we share these instruction
493 // definitions with Thumb2 where these instructions are predicable.
494 if (!DecodePredicateOperand(MI, 0xE, Address, this))
495 return MCDisassembler::Fail;
500 result = decodeInstruction(DecoderTablev8NEON32, MI, insn, Address,
502 if (result != MCDisassembler::Fail) {
508 result = decodeInstruction(DecoderTablev8Crypto32, MI, insn, Address,
510 if (result != MCDisassembler::Fail) {
517 return MCDisassembler::Fail;
521 extern const MCInstrDesc ARMInsts[];
524 /// tryAddingSymbolicOperand - trys to add a symbolic operand in place of the
525 /// immediate Value in the MCInst. The immediate Value has had any PC
526 /// adjustment made by the caller. If the instruction is a branch instruction
527 /// then isBranch is true, else false. If the getOpInfo() function was set as
528 /// part of the setupForSymbolicDisassembly() call then that function is called
529 /// to get any symbolic information at the Address for this instruction. If
530 /// that returns non-zero then the symbolic information it returns is used to
531 /// create an MCExpr and that is added as an operand to the MCInst. If
532 /// getOpInfo() returns zero and isBranch is true then a symbol look up for
533 /// Value is done and if a symbol is found an MCExpr is created with that, else
534 /// an MCExpr with Value is created. This function returns true if it adds an
535 /// operand to the MCInst and false otherwise.
536 static bool tryAddingSymbolicOperand(uint64_t Address, int32_t Value,
537 bool isBranch, uint64_t InstSize,
538 MCInst &MI, const void *Decoder) {
539 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
540 // FIXME: Does it make sense for value to be negative?
541 return Dis->tryAddingSymbolicOperand(MI, (uint32_t)Value, Address, isBranch,
542 /* Offset */ 0, InstSize);
545 /// tryAddingPcLoadReferenceComment - trys to add a comment as to what is being
546 /// referenced by a load instruction with the base register that is the Pc.
547 /// These can often be values in a literal pool near the Address of the
548 /// instruction. The Address of the instruction and its immediate Value are
549 /// used as a possible literal pool entry. The SymbolLookUp call back will
550 /// return the name of a symbol referenced by the literal pool's entry if
551 /// the referenced address is that of a symbol. Or it will return a pointer to
552 /// a literal 'C' string if the referenced address of the literal pool's entry
553 /// is an address into a section with 'C' string literals.
554 static void tryAddingPcLoadReferenceComment(uint64_t Address, int Value,
555 const void *Decoder) {
556 const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
557 Dis->tryAddingPcLoadReferenceComment(Value, Address);
560 // Thumb1 instructions don't have explicit S bits. Rather, they
561 // implicitly set CPSR. Since it's not represented in the encoding, the
562 // auto-generated decoder won't inject the CPSR operand. We need to fix
563 // that as a post-pass.
564 static void AddThumb1SBit(MCInst &MI, bool InITBlock) {
565 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
566 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
567 MCInst::iterator I = MI.begin();
568 for (unsigned i = 0; i < NumOps; ++i, ++I) {
569 if (I == MI.end()) break;
570 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) {
571 if (i > 0 && OpInfo[i-1].isPredicate()) continue;
572 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
577 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
580 // Most Thumb instructions don't have explicit predicates in the
581 // encoding, but rather get their predicates from IT context. We need
582 // to fix up the predicate operands using this context information as a
584 MCDisassembler::DecodeStatus
585 ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
586 MCDisassembler::DecodeStatus S = Success;
588 // A few instructions actually have predicates encoded in them. Don't
589 // try to overwrite it if we're seeing one of those.
590 switch (MI.getOpcode()) {
601 // Some instructions (mostly conditional branches) are not
602 // allowed in IT blocks.
603 if (ITBlock.instrInITBlock())
612 // Some instructions (mostly unconditional branches) can
613 // only appears at the end of, or outside of, an IT.
614 if (ITBlock.instrInITBlock() && !ITBlock.instrLastInITBlock())
621 // If we're in an IT block, base the predicate on that. Otherwise,
622 // assume a predicate of AL.
624 CC = ITBlock.getITCC();
627 if (ITBlock.instrInITBlock())
628 ITBlock.advanceITState();
630 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
631 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
632 MCInst::iterator I = MI.begin();
633 for (unsigned i = 0; i < NumOps; ++i, ++I) {
634 if (I == MI.end()) break;
635 if (OpInfo[i].isPredicate()) {
636 I = MI.insert(I, MCOperand::CreateImm(CC));
639 MI.insert(I, MCOperand::CreateReg(0));
641 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
646 I = MI.insert(I, MCOperand::CreateImm(CC));
649 MI.insert(I, MCOperand::CreateReg(0));
651 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
656 // Thumb VFP instructions are a special case. Because we share their
657 // encodings between ARM and Thumb modes, and they are predicable in ARM
658 // mode, the auto-generated decoder will give them an (incorrect)
659 // predicate operand. We need to rewrite these operands based on the IT
660 // context as a post-pass.
661 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
663 CC = ITBlock.getITCC();
664 if (ITBlock.instrInITBlock())
665 ITBlock.advanceITState();
667 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
668 MCInst::iterator I = MI.begin();
669 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
670 for (unsigned i = 0; i < NumOps; ++i, ++I) {
671 if (OpInfo[i].isPredicate() ) {
677 I->setReg(ARM::CPSR);
683 DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
684 const MemoryObject &Region,
687 raw_ostream &cs) const {
692 assert((STI.getFeatureBits() & ARM::ModeThumb) &&
693 "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!");
695 // We want to read exactly 2 bytes of data.
696 if (Region.readBytes(Address, 2, bytes) == -1) {
698 return MCDisassembler::Fail;
701 uint16_t insn16 = (bytes[1] << 8) | bytes[0];
702 DecodeStatus result = decodeInstruction(DecoderTableThumb16, MI, insn16,
704 if (result != MCDisassembler::Fail) {
706 Check(result, AddThumbPredicate(MI));
711 result = decodeInstruction(DecoderTableThumbSBit16, MI, insn16,
715 bool InITBlock = ITBlock.instrInITBlock();
716 Check(result, AddThumbPredicate(MI));
717 AddThumb1SBit(MI, InITBlock);
722 result = decodeInstruction(DecoderTableThumb216, MI, insn16,
724 if (result != MCDisassembler::Fail) {
727 // Nested IT blocks are UNPREDICTABLE. Must be checked before we add
728 // the Thumb predicate.
729 if (MI.getOpcode() == ARM::t2IT && ITBlock.instrInITBlock())
730 result = MCDisassembler::SoftFail;
732 Check(result, AddThumbPredicate(MI));
734 // If we find an IT instruction, we need to parse its condition
735 // code and mask operands so that we can apply them correctly
736 // to the subsequent instructions.
737 if (MI.getOpcode() == ARM::t2IT) {
739 unsigned Firstcond = MI.getOperand(0).getImm();
740 unsigned Mask = MI.getOperand(1).getImm();
741 ITBlock.setITState(Firstcond, Mask);
747 // We want to read exactly 4 bytes of data.
748 if (Region.readBytes(Address, 4, bytes) == -1) {
750 return MCDisassembler::Fail;
753 uint32_t insn32 = (bytes[3] << 8) |
758 result = decodeInstruction(DecoderTableThumb32, MI, insn32, Address,
760 if (result != MCDisassembler::Fail) {
762 bool InITBlock = ITBlock.instrInITBlock();
763 Check(result, AddThumbPredicate(MI));
764 AddThumb1SBit(MI, InITBlock);
769 result = decodeInstruction(DecoderTableThumb232, MI, insn32, Address,
771 if (result != MCDisassembler::Fail) {
773 Check(result, AddThumbPredicate(MI));
777 if (fieldFromInstruction(insn32, 28, 4) == 0xE) {
779 result = decodeInstruction(DecoderTableVFP32, MI, insn32, Address, this, STI);
780 if (result != MCDisassembler::Fail) {
782 UpdateThumbVFPPredicate(MI);
788 result = decodeInstruction(DecoderTableVFPV832, MI, insn32, Address, this, STI);
789 if (result != MCDisassembler::Fail) {
794 if (fieldFromInstruction(insn32, 28, 4) == 0xE) {
796 result = decodeInstruction(DecoderTableNEONDup32, MI, insn32, Address,
798 if (result != MCDisassembler::Fail) {
800 Check(result, AddThumbPredicate(MI));
805 if (fieldFromInstruction(insn32, 24, 8) == 0xF9) {
807 uint32_t NEONLdStInsn = insn32;
808 NEONLdStInsn &= 0xF0FFFFFF;
809 NEONLdStInsn |= 0x04000000;
810 result = decodeInstruction(DecoderTableNEONLoadStore32, MI, NEONLdStInsn,
812 if (result != MCDisassembler::Fail) {
814 Check(result, AddThumbPredicate(MI));
819 if (fieldFromInstruction(insn32, 24, 4) == 0xF) {
821 uint32_t NEONDataInsn = insn32;
822 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
823 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
824 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
825 result = decodeInstruction(DecoderTableNEONData32, MI, NEONDataInsn,
827 if (result != MCDisassembler::Fail) {
829 Check(result, AddThumbPredicate(MI));
834 uint32_t NEONCryptoInsn = insn32;
835 NEONCryptoInsn &= 0xF0FFFFFF; // Clear bits 27-24
836 NEONCryptoInsn |= (NEONCryptoInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
837 NEONCryptoInsn |= 0x12000000; // Set bits 28 and 25
838 result = decodeInstruction(DecoderTablev8Crypto32, MI, NEONCryptoInsn,
840 if (result != MCDisassembler::Fail) {
846 uint32_t NEONv8Insn = insn32;
847 NEONv8Insn &= 0xF3FFFFFF; // Clear bits 27-26
848 result = decodeInstruction(DecoderTablev8NEON32, MI, NEONv8Insn, Address,
850 if (result != MCDisassembler::Fail) {
858 return MCDisassembler::Fail;
862 extern "C" void LLVMInitializeARMDisassembler() {
863 TargetRegistry::RegisterMCDisassembler(TheARMTarget,
864 createARMDisassembler);
865 TargetRegistry::RegisterMCDisassembler(TheThumbTarget,
866 createThumbDisassembler);
869 static const uint16_t GPRDecoderTable[] = {
870 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
871 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
872 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
873 ARM::R12, ARM::SP, ARM::LR, ARM::PC
876 static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
877 uint64_t Address, const void *Decoder) {
879 return MCDisassembler::Fail;
881 unsigned Register = GPRDecoderTable[RegNo];
882 Inst.addOperand(MCOperand::CreateReg(Register));
883 return MCDisassembler::Success;
887 DecodeGPRnopcRegisterClass(MCInst &Inst, unsigned RegNo,
888 uint64_t Address, const void *Decoder) {
889 DecodeStatus S = MCDisassembler::Success;
892 S = MCDisassembler::SoftFail;
894 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
900 DecodeGPRwithAPSRRegisterClass(MCInst &Inst, unsigned RegNo,
901 uint64_t Address, const void *Decoder) {
902 DecodeStatus S = MCDisassembler::Success;
906 Inst.addOperand(MCOperand::CreateReg(ARM::APSR_NZCV));
907 return MCDisassembler::Success;
910 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
914 static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
915 uint64_t Address, const void *Decoder) {
917 return MCDisassembler::Fail;
918 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
921 static const uint16_t GPRPairDecoderTable[] = {
922 ARM::R0_R1, ARM::R2_R3, ARM::R4_R5, ARM::R6_R7,
923 ARM::R8_R9, ARM::R10_R11, ARM::R12_SP
926 static DecodeStatus DecodeGPRPairRegisterClass(MCInst &Inst, unsigned RegNo,
927 uint64_t Address, const void *Decoder) {
928 DecodeStatus S = MCDisassembler::Success;
931 return MCDisassembler::Fail;
933 if ((RegNo & 1) || RegNo == 0xe)
934 S = MCDisassembler::SoftFail;
936 unsigned RegisterPair = GPRPairDecoderTable[RegNo/2];
937 Inst.addOperand(MCOperand::CreateReg(RegisterPair));
941 static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
942 uint64_t Address, const void *Decoder) {
943 unsigned Register = 0;
964 return MCDisassembler::Fail;
967 Inst.addOperand(MCOperand::CreateReg(Register));
968 return MCDisassembler::Success;
971 static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
972 uint64_t Address, const void *Decoder) {
973 DecodeStatus S = MCDisassembler::Success;
974 if (RegNo == 13 || RegNo == 15)
975 S = MCDisassembler::SoftFail;
976 Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
980 static const uint16_t SPRDecoderTable[] = {
981 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
982 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
983 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
984 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
985 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
986 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
987 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
988 ARM::S28, ARM::S29, ARM::S30, ARM::S31
991 static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
992 uint64_t Address, const void *Decoder) {
994 return MCDisassembler::Fail;
996 unsigned Register = SPRDecoderTable[RegNo];
997 Inst.addOperand(MCOperand::CreateReg(Register));
998 return MCDisassembler::Success;
1001 static const uint16_t DPRDecoderTable[] = {
1002 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
1003 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
1004 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
1005 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
1006 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
1007 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
1008 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
1009 ARM::D28, ARM::D29, ARM::D30, ARM::D31
1012 static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
1013 uint64_t Address, const void *Decoder) {
1015 return MCDisassembler::Fail;
1017 unsigned Register = DPRDecoderTable[RegNo];
1018 Inst.addOperand(MCOperand::CreateReg(Register));
1019 return MCDisassembler::Success;
1022 static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
1023 uint64_t Address, const void *Decoder) {
1025 return MCDisassembler::Fail;
1026 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
1030 DecodeDPR_VFP2RegisterClass(MCInst &Inst, unsigned RegNo,
1031 uint64_t Address, const void *Decoder) {
1033 return MCDisassembler::Fail;
1034 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
1037 static const uint16_t QPRDecoderTable[] = {
1038 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
1039 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
1040 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
1041 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
1045 static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
1046 uint64_t Address, const void *Decoder) {
1047 if (RegNo > 31 || (RegNo & 1) != 0)
1048 return MCDisassembler::Fail;
1051 unsigned Register = QPRDecoderTable[RegNo];
1052 Inst.addOperand(MCOperand::CreateReg(Register));
1053 return MCDisassembler::Success;
1056 static const uint16_t DPairDecoderTable[] = {
1057 ARM::Q0, ARM::D1_D2, ARM::Q1, ARM::D3_D4, ARM::Q2, ARM::D5_D6,
1058 ARM::Q3, ARM::D7_D8, ARM::Q4, ARM::D9_D10, ARM::Q5, ARM::D11_D12,
1059 ARM::Q6, ARM::D13_D14, ARM::Q7, ARM::D15_D16, ARM::Q8, ARM::D17_D18,
1060 ARM::Q9, ARM::D19_D20, ARM::Q10, ARM::D21_D22, ARM::Q11, ARM::D23_D24,
1061 ARM::Q12, ARM::D25_D26, ARM::Q13, ARM::D27_D28, ARM::Q14, ARM::D29_D30,
1065 static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
1066 uint64_t Address, const void *Decoder) {
1068 return MCDisassembler::Fail;
1070 unsigned Register = DPairDecoderTable[RegNo];
1071 Inst.addOperand(MCOperand::CreateReg(Register));
1072 return MCDisassembler::Success;
1075 static const uint16_t DPairSpacedDecoderTable[] = {
1076 ARM::D0_D2, ARM::D1_D3, ARM::D2_D4, ARM::D3_D5,
1077 ARM::D4_D6, ARM::D5_D7, ARM::D6_D8, ARM::D7_D9,
1078 ARM::D8_D10, ARM::D9_D11, ARM::D10_D12, ARM::D11_D13,
1079 ARM::D12_D14, ARM::D13_D15, ARM::D14_D16, ARM::D15_D17,
1080 ARM::D16_D18, ARM::D17_D19, ARM::D18_D20, ARM::D19_D21,
1081 ARM::D20_D22, ARM::D21_D23, ARM::D22_D24, ARM::D23_D25,
1082 ARM::D24_D26, ARM::D25_D27, ARM::D26_D28, ARM::D27_D29,
1083 ARM::D28_D30, ARM::D29_D31
1086 static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
1089 const void *Decoder) {
1091 return MCDisassembler::Fail;
1093 unsigned Register = DPairSpacedDecoderTable[RegNo];
1094 Inst.addOperand(MCOperand::CreateReg(Register));
1095 return MCDisassembler::Success;
1098 static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
1099 uint64_t Address, const void *Decoder) {
1100 if (Val == 0xF) return MCDisassembler::Fail;
1101 // AL predicate is not allowed on Thumb1 branches.
1102 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
1103 return MCDisassembler::Fail;
1104 Inst.addOperand(MCOperand::CreateImm(Val));
1105 if (Val == ARMCC::AL) {
1106 Inst.addOperand(MCOperand::CreateReg(0));
1108 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1109 return MCDisassembler::Success;
1112 static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
1113 uint64_t Address, const void *Decoder) {
1115 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1117 Inst.addOperand(MCOperand::CreateReg(0));
1118 return MCDisassembler::Success;
1121 static DecodeStatus DecodeSOImmOperand(MCInst &Inst, unsigned Val,
1122 uint64_t Address, const void *Decoder) {
1123 uint32_t imm = Val & 0xFF;
1124 uint32_t rot = (Val & 0xF00) >> 7;
1125 uint32_t rot_imm = (imm >> rot) | (imm << ((32-rot) & 0x1F));
1126 Inst.addOperand(MCOperand::CreateImm(rot_imm));
1127 return MCDisassembler::Success;
1130 static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Val,
1131 uint64_t Address, const void *Decoder) {
1132 DecodeStatus S = MCDisassembler::Success;
1134 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1135 unsigned type = fieldFromInstruction(Val, 5, 2);
1136 unsigned imm = fieldFromInstruction(Val, 7, 5);
1138 // Register-immediate
1139 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1140 return MCDisassembler::Fail;
1142 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1145 Shift = ARM_AM::lsl;
1148 Shift = ARM_AM::lsr;
1151 Shift = ARM_AM::asr;
1154 Shift = ARM_AM::ror;
1158 if (Shift == ARM_AM::ror && imm == 0)
1159 Shift = ARM_AM::rrx;
1161 unsigned Op = Shift | (imm << 3);
1162 Inst.addOperand(MCOperand::CreateImm(Op));
1167 static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Val,
1168 uint64_t Address, const void *Decoder) {
1169 DecodeStatus S = MCDisassembler::Success;
1171 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1172 unsigned type = fieldFromInstruction(Val, 5, 2);
1173 unsigned Rs = fieldFromInstruction(Val, 8, 4);
1175 // Register-register
1176 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1177 return MCDisassembler::Fail;
1178 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)))
1179 return MCDisassembler::Fail;
1181 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
1184 Shift = ARM_AM::lsl;
1187 Shift = ARM_AM::lsr;
1190 Shift = ARM_AM::asr;
1193 Shift = ARM_AM::ror;
1197 Inst.addOperand(MCOperand::CreateImm(Shift));
1202 static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
1203 uint64_t Address, const void *Decoder) {
1204 DecodeStatus S = MCDisassembler::Success;
1206 bool NeedDisjointWriteback = false;
1207 unsigned WritebackReg = 0;
1208 switch (Inst.getOpcode()) {
1211 case ARM::LDMIA_UPD:
1212 case ARM::LDMDB_UPD:
1213 case ARM::LDMIB_UPD:
1214 case ARM::LDMDA_UPD:
1215 case ARM::t2LDMIA_UPD:
1216 case ARM::t2LDMDB_UPD:
1217 case ARM::t2STMIA_UPD:
1218 case ARM::t2STMDB_UPD:
1219 NeedDisjointWriteback = true;
1220 WritebackReg = Inst.getOperand(0).getReg();
1224 // Empty register lists are not allowed.
1225 if (Val == 0) return MCDisassembler::Fail;
1226 for (unsigned i = 0; i < 16; ++i) {
1227 if (Val & (1 << i)) {
1228 if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder)))
1229 return MCDisassembler::Fail;
1230 // Writeback not allowed if Rn is in the target list.
1231 if (NeedDisjointWriteback && WritebackReg == Inst.end()[-1].getReg())
1232 Check(S, MCDisassembler::SoftFail);
1239 static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
1240 uint64_t Address, const void *Decoder) {
1241 DecodeStatus S = MCDisassembler::Success;
1243 unsigned Vd = fieldFromInstruction(Val, 8, 5);
1244 unsigned regs = fieldFromInstruction(Val, 0, 8);
1246 // In case of unpredictable encoding, tweak the operands.
1247 if (regs == 0 || (Vd + regs) > 32) {
1248 regs = Vd + regs > 32 ? 32 - Vd : regs;
1249 regs = std::max( 1u, regs);
1250 S = MCDisassembler::SoftFail;
1253 if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
1254 return MCDisassembler::Fail;
1255 for (unsigned i = 0; i < (regs - 1); ++i) {
1256 if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1257 return MCDisassembler::Fail;
1263 static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
1264 uint64_t Address, const void *Decoder) {
1265 DecodeStatus S = MCDisassembler::Success;
1267 unsigned Vd = fieldFromInstruction(Val, 8, 5);
1268 unsigned regs = fieldFromInstruction(Val, 1, 7);
1270 // In case of unpredictable encoding, tweak the operands.
1271 if (regs == 0 || regs > 16 || (Vd + regs) > 32) {
1272 regs = Vd + regs > 32 ? 32 - Vd : regs;
1273 regs = std::max( 1u, regs);
1274 regs = std::min(16u, regs);
1275 S = MCDisassembler::SoftFail;
1278 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
1279 return MCDisassembler::Fail;
1280 for (unsigned i = 0; i < (regs - 1); ++i) {
1281 if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)))
1282 return MCDisassembler::Fail;
1288 static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Val,
1289 uint64_t Address, const void *Decoder) {
1290 // This operand encodes a mask of contiguous zeros between a specified MSB
1291 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
1292 // the mask of all bits LSB-and-lower, and then xor them to create
1293 // the mask of that's all ones on [msb, lsb]. Finally we not it to
1294 // create the final mask.
1295 unsigned msb = fieldFromInstruction(Val, 5, 5);
1296 unsigned lsb = fieldFromInstruction(Val, 0, 5);
1298 DecodeStatus S = MCDisassembler::Success;
1300 Check(S, MCDisassembler::SoftFail);
1301 // The check above will cause the warning for the "potentially undefined
1302 // instruction encoding" but we can't build a bad MCOperand value here
1303 // with a lsb > msb or else printing the MCInst will cause a crash.
1307 uint32_t msb_mask = 0xFFFFFFFF;
1308 if (msb != 31) msb_mask = (1U << (msb+1)) - 1;
1309 uint32_t lsb_mask = (1U << lsb) - 1;
1311 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
1315 static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
1316 uint64_t Address, const void *Decoder) {
1317 DecodeStatus S = MCDisassembler::Success;
1319 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1320 unsigned CRd = fieldFromInstruction(Insn, 12, 4);
1321 unsigned coproc = fieldFromInstruction(Insn, 8, 4);
1322 unsigned imm = fieldFromInstruction(Insn, 0, 8);
1323 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1324 unsigned U = fieldFromInstruction(Insn, 23, 1);
1326 switch (Inst.getOpcode()) {
1327 case ARM::LDC_OFFSET:
1330 case ARM::LDC_OPTION:
1331 case ARM::LDCL_OFFSET:
1333 case ARM::LDCL_POST:
1334 case ARM::LDCL_OPTION:
1335 case ARM::STC_OFFSET:
1338 case ARM::STC_OPTION:
1339 case ARM::STCL_OFFSET:
1341 case ARM::STCL_POST:
1342 case ARM::STCL_OPTION:
1343 case ARM::t2LDC_OFFSET:
1344 case ARM::t2LDC_PRE:
1345 case ARM::t2LDC_POST:
1346 case ARM::t2LDC_OPTION:
1347 case ARM::t2LDCL_OFFSET:
1348 case ARM::t2LDCL_PRE:
1349 case ARM::t2LDCL_POST:
1350 case ARM::t2LDCL_OPTION:
1351 case ARM::t2STC_OFFSET:
1352 case ARM::t2STC_PRE:
1353 case ARM::t2STC_POST:
1354 case ARM::t2STC_OPTION:
1355 case ARM::t2STCL_OFFSET:
1356 case ARM::t2STCL_PRE:
1357 case ARM::t2STCL_POST:
1358 case ARM::t2STCL_OPTION:
1359 if (coproc == 0xA || coproc == 0xB)
1360 return MCDisassembler::Fail;
1366 Inst.addOperand(MCOperand::CreateImm(coproc));
1367 Inst.addOperand(MCOperand::CreateImm(CRd));
1368 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1369 return MCDisassembler::Fail;
1371 switch (Inst.getOpcode()) {
1372 case ARM::t2LDC2_OFFSET:
1373 case ARM::t2LDC2L_OFFSET:
1374 case ARM::t2LDC2_PRE:
1375 case ARM::t2LDC2L_PRE:
1376 case ARM::t2STC2_OFFSET:
1377 case ARM::t2STC2L_OFFSET:
1378 case ARM::t2STC2_PRE:
1379 case ARM::t2STC2L_PRE:
1380 case ARM::LDC2_OFFSET:
1381 case ARM::LDC2L_OFFSET:
1383 case ARM::LDC2L_PRE:
1384 case ARM::STC2_OFFSET:
1385 case ARM::STC2L_OFFSET:
1387 case ARM::STC2L_PRE:
1388 case ARM::t2LDC_OFFSET:
1389 case ARM::t2LDCL_OFFSET:
1390 case ARM::t2LDC_PRE:
1391 case ARM::t2LDCL_PRE:
1392 case ARM::t2STC_OFFSET:
1393 case ARM::t2STCL_OFFSET:
1394 case ARM::t2STC_PRE:
1395 case ARM::t2STCL_PRE:
1396 case ARM::LDC_OFFSET:
1397 case ARM::LDCL_OFFSET:
1400 case ARM::STC_OFFSET:
1401 case ARM::STCL_OFFSET:
1404 imm = ARM_AM::getAM5Opc(U ? ARM_AM::add : ARM_AM::sub, imm);
1405 Inst.addOperand(MCOperand::CreateImm(imm));
1407 case ARM::t2LDC2_POST:
1408 case ARM::t2LDC2L_POST:
1409 case ARM::t2STC2_POST:
1410 case ARM::t2STC2L_POST:
1411 case ARM::LDC2_POST:
1412 case ARM::LDC2L_POST:
1413 case ARM::STC2_POST:
1414 case ARM::STC2L_POST:
1415 case ARM::t2LDC_POST:
1416 case ARM::t2LDCL_POST:
1417 case ARM::t2STC_POST:
1418 case ARM::t2STCL_POST:
1420 case ARM::LDCL_POST:
1422 case ARM::STCL_POST:
1426 // The 'option' variant doesn't encode 'U' in the immediate since
1427 // the immediate is unsigned [0,255].
1428 Inst.addOperand(MCOperand::CreateImm(imm));
1432 switch (Inst.getOpcode()) {
1433 case ARM::LDC_OFFSET:
1436 case ARM::LDC_OPTION:
1437 case ARM::LDCL_OFFSET:
1439 case ARM::LDCL_POST:
1440 case ARM::LDCL_OPTION:
1441 case ARM::STC_OFFSET:
1444 case ARM::STC_OPTION:
1445 case ARM::STCL_OFFSET:
1447 case ARM::STCL_POST:
1448 case ARM::STCL_OPTION:
1449 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1450 return MCDisassembler::Fail;
1460 DecodeAddrMode2IdxInstruction(MCInst &Inst, unsigned Insn,
1461 uint64_t Address, const void *Decoder) {
1462 DecodeStatus S = MCDisassembler::Success;
1464 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1465 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1466 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1467 unsigned imm = fieldFromInstruction(Insn, 0, 12);
1468 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1469 unsigned reg = fieldFromInstruction(Insn, 25, 1);
1470 unsigned P = fieldFromInstruction(Insn, 24, 1);
1471 unsigned W = fieldFromInstruction(Insn, 21, 1);
1473 // On stores, the writeback operand precedes Rt.
1474 switch (Inst.getOpcode()) {
1475 case ARM::STR_POST_IMM:
1476 case ARM::STR_POST_REG:
1477 case ARM::STRB_POST_IMM:
1478 case ARM::STRB_POST_REG:
1479 case ARM::STRT_POST_REG:
1480 case ARM::STRT_POST_IMM:
1481 case ARM::STRBT_POST_REG:
1482 case ARM::STRBT_POST_IMM:
1483 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1484 return MCDisassembler::Fail;
1490 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1491 return MCDisassembler::Fail;
1493 // On loads, the writeback operand comes after Rt.
1494 switch (Inst.getOpcode()) {
1495 case ARM::LDR_POST_IMM:
1496 case ARM::LDR_POST_REG:
1497 case ARM::LDRB_POST_IMM:
1498 case ARM::LDRB_POST_REG:
1499 case ARM::LDRBT_POST_REG:
1500 case ARM::LDRBT_POST_IMM:
1501 case ARM::LDRT_POST_REG:
1502 case ARM::LDRT_POST_IMM:
1503 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1504 return MCDisassembler::Fail;
1510 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1511 return MCDisassembler::Fail;
1513 ARM_AM::AddrOpc Op = ARM_AM::add;
1514 if (!fieldFromInstruction(Insn, 23, 1))
1517 bool writeback = (P == 0) || (W == 1);
1518 unsigned idx_mode = 0;
1520 idx_mode = ARMII::IndexModePre;
1521 else if (!P && writeback)
1522 idx_mode = ARMII::IndexModePost;
1524 if (writeback && (Rn == 15 || Rn == Rt))
1525 S = MCDisassembler::SoftFail; // UNPREDICTABLE
1528 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1529 return MCDisassembler::Fail;
1530 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1531 switch( fieldFromInstruction(Insn, 5, 2)) {
1545 return MCDisassembler::Fail;
1547 unsigned amt = fieldFromInstruction(Insn, 7, 5);
1548 if (Opc == ARM_AM::ror && amt == 0)
1550 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1552 Inst.addOperand(MCOperand::CreateImm(imm));
1554 Inst.addOperand(MCOperand::CreateReg(0));
1555 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1556 Inst.addOperand(MCOperand::CreateImm(tmp));
1559 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1560 return MCDisassembler::Fail;
1565 static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Val,
1566 uint64_t Address, const void *Decoder) {
1567 DecodeStatus S = MCDisassembler::Success;
1569 unsigned Rn = fieldFromInstruction(Val, 13, 4);
1570 unsigned Rm = fieldFromInstruction(Val, 0, 4);
1571 unsigned type = fieldFromInstruction(Val, 5, 2);
1572 unsigned imm = fieldFromInstruction(Val, 7, 5);
1573 unsigned U = fieldFromInstruction(Val, 12, 1);
1575 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1591 if (ShOp == ARM_AM::ror && imm == 0)
1594 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1595 return MCDisassembler::Fail;
1596 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1597 return MCDisassembler::Fail;
1600 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1602 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1603 Inst.addOperand(MCOperand::CreateImm(shift));
1609 DecodeAddrMode3Instruction(MCInst &Inst, unsigned Insn,
1610 uint64_t Address, const void *Decoder) {
1611 DecodeStatus S = MCDisassembler::Success;
1613 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
1614 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1615 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1616 unsigned type = fieldFromInstruction(Insn, 22, 1);
1617 unsigned imm = fieldFromInstruction(Insn, 8, 4);
1618 unsigned U = ((~fieldFromInstruction(Insn, 23, 1)) & 1) << 8;
1619 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1620 unsigned W = fieldFromInstruction(Insn, 21, 1);
1621 unsigned P = fieldFromInstruction(Insn, 24, 1);
1622 unsigned Rt2 = Rt + 1;
1624 bool writeback = (W == 1) | (P == 0);
1626 // For {LD,ST}RD, Rt must be even, else undefined.
1627 switch (Inst.getOpcode()) {
1630 case ARM::STRD_POST:
1633 case ARM::LDRD_POST:
1634 if (Rt & 0x1) S = MCDisassembler::SoftFail;
1639 switch (Inst.getOpcode()) {
1642 case ARM::STRD_POST:
1643 if (P == 0 && W == 1)
1644 S = MCDisassembler::SoftFail;
1646 if (writeback && (Rn == 15 || Rn == Rt || Rn == Rt2))
1647 S = MCDisassembler::SoftFail;
1648 if (type && Rm == 15)
1649 S = MCDisassembler::SoftFail;
1651 S = MCDisassembler::SoftFail;
1652 if (!type && fieldFromInstruction(Insn, 8, 4))
1653 S = MCDisassembler::SoftFail;
1657 case ARM::STRH_POST:
1659 S = MCDisassembler::SoftFail;
1660 if (writeback && (Rn == 15 || Rn == Rt))
1661 S = MCDisassembler::SoftFail;
1662 if (!type && Rm == 15)
1663 S = MCDisassembler::SoftFail;
1667 case ARM::LDRD_POST:
1668 if (type && Rn == 15){
1670 S = MCDisassembler::SoftFail;
1673 if (P == 0 && W == 1)
1674 S = MCDisassembler::SoftFail;
1675 if (!type && (Rt2 == 15 || Rm == 15 || Rm == Rt || Rm == Rt2))
1676 S = MCDisassembler::SoftFail;
1677 if (!type && writeback && Rn == 15)
1678 S = MCDisassembler::SoftFail;
1679 if (writeback && (Rn == Rt || Rn == Rt2))
1680 S = MCDisassembler::SoftFail;
1684 case ARM::LDRH_POST:
1685 if (type && Rn == 15){
1687 S = MCDisassembler::SoftFail;
1691 S = MCDisassembler::SoftFail;
1692 if (!type && Rm == 15)
1693 S = MCDisassembler::SoftFail;
1694 if (!type && writeback && (Rn == 15 || Rn == Rt))
1695 S = MCDisassembler::SoftFail;
1698 case ARM::LDRSH_PRE:
1699 case ARM::LDRSH_POST:
1701 case ARM::LDRSB_PRE:
1702 case ARM::LDRSB_POST:
1703 if (type && Rn == 15){
1705 S = MCDisassembler::SoftFail;
1708 if (type && (Rt == 15 || (writeback && Rn == Rt)))
1709 S = MCDisassembler::SoftFail;
1710 if (!type && (Rt == 15 || Rm == 15))
1711 S = MCDisassembler::SoftFail;
1712 if (!type && writeback && (Rn == 15 || Rn == Rt))
1713 S = MCDisassembler::SoftFail;
1719 if (writeback) { // Writeback
1721 U |= ARMII::IndexModePre << 9;
1723 U |= ARMII::IndexModePost << 9;
1725 // On stores, the writeback operand precedes Rt.
1726 switch (Inst.getOpcode()) {
1729 case ARM::STRD_POST:
1732 case ARM::STRH_POST:
1733 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1734 return MCDisassembler::Fail;
1741 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1742 return MCDisassembler::Fail;
1743 switch (Inst.getOpcode()) {
1746 case ARM::STRD_POST:
1749 case ARM::LDRD_POST:
1750 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
1751 return MCDisassembler::Fail;
1758 // On loads, the writeback operand comes after Rt.
1759 switch (Inst.getOpcode()) {
1762 case ARM::LDRD_POST:
1765 case ARM::LDRH_POST:
1767 case ARM::LDRSH_PRE:
1768 case ARM::LDRSH_POST:
1770 case ARM::LDRSB_PRE:
1771 case ARM::LDRSB_POST:
1774 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1775 return MCDisassembler::Fail;
1782 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1783 return MCDisassembler::Fail;
1786 Inst.addOperand(MCOperand::CreateReg(0));
1787 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1789 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1790 return MCDisassembler::Fail;
1791 Inst.addOperand(MCOperand::CreateImm(U));
1794 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1795 return MCDisassembler::Fail;
1800 static DecodeStatus DecodeRFEInstruction(MCInst &Inst, unsigned Insn,
1801 uint64_t Address, const void *Decoder) {
1802 DecodeStatus S = MCDisassembler::Success;
1804 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1805 unsigned mode = fieldFromInstruction(Insn, 23, 2);
1822 Inst.addOperand(MCOperand::CreateImm(mode));
1823 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1824 return MCDisassembler::Fail;
1829 static DecodeStatus DecodeQADDInstruction(MCInst &Inst, unsigned Insn,
1830 uint64_t Address, const void *Decoder) {
1831 DecodeStatus S = MCDisassembler::Success;
1833 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
1834 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
1835 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1836 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1839 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
1841 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1842 return MCDisassembler::Fail;
1843 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1844 return MCDisassembler::Fail;
1845 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
1846 return MCDisassembler::Fail;
1847 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1848 return MCDisassembler::Fail;
1852 static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst &Inst,
1854 uint64_t Address, const void *Decoder) {
1855 DecodeStatus S = MCDisassembler::Success;
1857 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
1858 unsigned pred = fieldFromInstruction(Insn, 28, 4);
1859 unsigned reglist = fieldFromInstruction(Insn, 0, 16);
1862 // Ambiguous with RFE and SRS
1863 switch (Inst.getOpcode()) {
1865 Inst.setOpcode(ARM::RFEDA);
1867 case ARM::LDMDA_UPD:
1868 Inst.setOpcode(ARM::RFEDA_UPD);
1871 Inst.setOpcode(ARM::RFEDB);
1873 case ARM::LDMDB_UPD:
1874 Inst.setOpcode(ARM::RFEDB_UPD);
1877 Inst.setOpcode(ARM::RFEIA);
1879 case ARM::LDMIA_UPD:
1880 Inst.setOpcode(ARM::RFEIA_UPD);
1883 Inst.setOpcode(ARM::RFEIB);
1885 case ARM::LDMIB_UPD:
1886 Inst.setOpcode(ARM::RFEIB_UPD);
1889 Inst.setOpcode(ARM::SRSDA);
1891 case ARM::STMDA_UPD:
1892 Inst.setOpcode(ARM::SRSDA_UPD);
1895 Inst.setOpcode(ARM::SRSDB);
1897 case ARM::STMDB_UPD:
1898 Inst.setOpcode(ARM::SRSDB_UPD);
1901 Inst.setOpcode(ARM::SRSIA);
1903 case ARM::STMIA_UPD:
1904 Inst.setOpcode(ARM::SRSIA_UPD);
1907 Inst.setOpcode(ARM::SRSIB);
1909 case ARM::STMIB_UPD:
1910 Inst.setOpcode(ARM::SRSIB_UPD);
1913 return MCDisassembler::Fail;
1916 // For stores (which become SRS's, the only operand is the mode.
1917 if (fieldFromInstruction(Insn, 20, 1) == 0) {
1918 // Check SRS encoding constraints
1919 if (!(fieldFromInstruction(Insn, 22, 1) == 1 &&
1920 fieldFromInstruction(Insn, 20, 1) == 0))
1921 return MCDisassembler::Fail;
1924 MCOperand::CreateImm(fieldFromInstruction(Insn, 0, 4)));
1928 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1931 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1932 return MCDisassembler::Fail;
1933 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1934 return MCDisassembler::Fail; // Tied
1935 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1936 return MCDisassembler::Fail;
1937 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
1938 return MCDisassembler::Fail;
1943 static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
1944 uint64_t Address, const void *Decoder) {
1945 unsigned imod = fieldFromInstruction(Insn, 18, 2);
1946 unsigned M = fieldFromInstruction(Insn, 17, 1);
1947 unsigned iflags = fieldFromInstruction(Insn, 6, 3);
1948 unsigned mode = fieldFromInstruction(Insn, 0, 5);
1950 DecodeStatus S = MCDisassembler::Success;
1952 // This decoder is called from multiple location that do not check
1953 // the full encoding is valid before they do.
1954 if (fieldFromInstruction(Insn, 5, 1) != 0 ||
1955 fieldFromInstruction(Insn, 16, 1) != 0 ||
1956 fieldFromInstruction(Insn, 20, 8) != 0x10)
1957 return MCDisassembler::Fail;
1959 // imod == '01' --> UNPREDICTABLE
1960 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1961 // return failure here. The '01' imod value is unprintable, so there's
1962 // nothing useful we could do even if we returned UNPREDICTABLE.
1964 if (imod == 1) return MCDisassembler::Fail;
1967 Inst.setOpcode(ARM::CPS3p);
1968 Inst.addOperand(MCOperand::CreateImm(imod));
1969 Inst.addOperand(MCOperand::CreateImm(iflags));
1970 Inst.addOperand(MCOperand::CreateImm(mode));
1971 } else if (imod && !M) {
1972 Inst.setOpcode(ARM::CPS2p);
1973 Inst.addOperand(MCOperand::CreateImm(imod));
1974 Inst.addOperand(MCOperand::CreateImm(iflags));
1975 if (mode) S = MCDisassembler::SoftFail;
1976 } else if (!imod && M) {
1977 Inst.setOpcode(ARM::CPS1p);
1978 Inst.addOperand(MCOperand::CreateImm(mode));
1979 if (iflags) S = MCDisassembler::SoftFail;
1981 // imod == '00' && M == '0' --> UNPREDICTABLE
1982 Inst.setOpcode(ARM::CPS1p);
1983 Inst.addOperand(MCOperand::CreateImm(mode));
1984 S = MCDisassembler::SoftFail;
1990 static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
1991 uint64_t Address, const void *Decoder) {
1992 unsigned imod = fieldFromInstruction(Insn, 9, 2);
1993 unsigned M = fieldFromInstruction(Insn, 8, 1);
1994 unsigned iflags = fieldFromInstruction(Insn, 5, 3);
1995 unsigned mode = fieldFromInstruction(Insn, 0, 5);
1997 DecodeStatus S = MCDisassembler::Success;
1999 // imod == '01' --> UNPREDICTABLE
2000 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
2001 // return failure here. The '01' imod value is unprintable, so there's
2002 // nothing useful we could do even if we returned UNPREDICTABLE.
2004 if (imod == 1) return MCDisassembler::Fail;
2007 Inst.setOpcode(ARM::t2CPS3p);
2008 Inst.addOperand(MCOperand::CreateImm(imod));
2009 Inst.addOperand(MCOperand::CreateImm(iflags));
2010 Inst.addOperand(MCOperand::CreateImm(mode));
2011 } else if (imod && !M) {
2012 Inst.setOpcode(ARM::t2CPS2p);
2013 Inst.addOperand(MCOperand::CreateImm(imod));
2014 Inst.addOperand(MCOperand::CreateImm(iflags));
2015 if (mode) S = MCDisassembler::SoftFail;
2016 } else if (!imod && M) {
2017 Inst.setOpcode(ARM::t2CPS1p);
2018 Inst.addOperand(MCOperand::CreateImm(mode));
2019 if (iflags) S = MCDisassembler::SoftFail;
2021 // imod == '00' && M == '0' --> this is a HINT instruction
2022 int imm = fieldFromInstruction(Insn, 0, 8);
2023 // HINT are defined only for immediate in [0..4]
2024 if(imm > 4) return MCDisassembler::Fail;
2025 Inst.setOpcode(ARM::t2HINT);
2026 Inst.addOperand(MCOperand::CreateImm(imm));
2032 static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
2033 uint64_t Address, const void *Decoder) {
2034 DecodeStatus S = MCDisassembler::Success;
2036 unsigned Rd = fieldFromInstruction(Insn, 8, 4);
2039 imm |= (fieldFromInstruction(Insn, 0, 8) << 0);
2040 imm |= (fieldFromInstruction(Insn, 12, 3) << 8);
2041 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
2042 imm |= (fieldFromInstruction(Insn, 26, 1) << 11);
2044 if (Inst.getOpcode() == ARM::t2MOVTi16)
2045 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
2046 return MCDisassembler::Fail;
2047 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
2048 return MCDisassembler::Fail;
2050 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
2051 Inst.addOperand(MCOperand::CreateImm(imm));
2056 static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
2057 uint64_t Address, const void *Decoder) {
2058 DecodeStatus S = MCDisassembler::Success;
2060 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2061 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2064 imm |= (fieldFromInstruction(Insn, 0, 12) << 0);
2065 imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
2067 if (Inst.getOpcode() == ARM::MOVTi16)
2068 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2069 return MCDisassembler::Fail;
2071 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2072 return MCDisassembler::Fail;
2074 if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
2075 Inst.addOperand(MCOperand::CreateImm(imm));
2077 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2078 return MCDisassembler::Fail;
2083 static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
2084 uint64_t Address, const void *Decoder) {
2085 DecodeStatus S = MCDisassembler::Success;
2087 unsigned Rd = fieldFromInstruction(Insn, 16, 4);
2088 unsigned Rn = fieldFromInstruction(Insn, 0, 4);
2089 unsigned Rm = fieldFromInstruction(Insn, 8, 4);
2090 unsigned Ra = fieldFromInstruction(Insn, 12, 4);
2091 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2094 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
2096 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
2097 return MCDisassembler::Fail;
2098 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
2099 return MCDisassembler::Fail;
2100 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
2101 return MCDisassembler::Fail;
2102 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
2103 return MCDisassembler::Fail;
2105 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2106 return MCDisassembler::Fail;
2111 static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
2112 uint64_t Address, const void *Decoder) {
2113 DecodeStatus S = MCDisassembler::Success;
2115 unsigned add = fieldFromInstruction(Val, 12, 1);
2116 unsigned imm = fieldFromInstruction(Val, 0, 12);
2117 unsigned Rn = fieldFromInstruction(Val, 13, 4);
2119 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2120 return MCDisassembler::Fail;
2122 if (!add) imm *= -1;
2123 if (imm == 0 && !add) imm = INT32_MIN;
2124 Inst.addOperand(MCOperand::CreateImm(imm));
2126 tryAddingPcLoadReferenceComment(Address, Address + imm + 8, Decoder);
2131 static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
2132 uint64_t Address, const void *Decoder) {
2133 DecodeStatus S = MCDisassembler::Success;
2135 unsigned Rn = fieldFromInstruction(Val, 9, 4);
2136 unsigned U = fieldFromInstruction(Val, 8, 1);
2137 unsigned imm = fieldFromInstruction(Val, 0, 8);
2139 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2140 return MCDisassembler::Fail;
2143 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
2145 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
2150 static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
2151 uint64_t Address, const void *Decoder) {
2152 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
2156 DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
2157 uint64_t Address, const void *Decoder) {
2158 DecodeStatus Status = MCDisassembler::Success;
2160 // Note the J1 and J2 values are from the encoded instruction. So here
2161 // change them to I1 and I2 values via as documented:
2162 // I1 = NOT(J1 EOR S);
2163 // I2 = NOT(J2 EOR S);
2164 // and build the imm32 with one trailing zero as documented:
2165 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
2166 unsigned S = fieldFromInstruction(Insn, 26, 1);
2167 unsigned J1 = fieldFromInstruction(Insn, 13, 1);
2168 unsigned J2 = fieldFromInstruction(Insn, 11, 1);
2169 unsigned I1 = !(J1 ^ S);
2170 unsigned I2 = !(J2 ^ S);
2171 unsigned imm10 = fieldFromInstruction(Insn, 16, 10);
2172 unsigned imm11 = fieldFromInstruction(Insn, 0, 11);
2173 unsigned tmp = (S << 23) | (I1 << 22) | (I2 << 21) | (imm10 << 11) | imm11;
2174 int imm32 = SignExtend32<25>(tmp << 1);
2175 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
2176 true, 4, Inst, Decoder))
2177 Inst.addOperand(MCOperand::CreateImm(imm32));
2183 DecodeBranchImmInstruction(MCInst &Inst, unsigned Insn,
2184 uint64_t Address, const void *Decoder) {
2185 DecodeStatus S = MCDisassembler::Success;
2187 unsigned pred = fieldFromInstruction(Insn, 28, 4);
2188 unsigned imm = fieldFromInstruction(Insn, 0, 24) << 2;
2191 Inst.setOpcode(ARM::BLXi);
2192 imm |= fieldFromInstruction(Insn, 24, 1) << 1;
2193 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2194 true, 4, Inst, Decoder))
2195 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2199 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
2200 true, 4, Inst, Decoder))
2201 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
2202 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2203 return MCDisassembler::Fail;
2209 static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
2210 uint64_t Address, const void *Decoder) {
2211 DecodeStatus S = MCDisassembler::Success;
2213 unsigned Rm = fieldFromInstruction(Val, 0, 4);
2214 unsigned align = fieldFromInstruction(Val, 4, 2);
2216 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2217 return MCDisassembler::Fail;
2219 Inst.addOperand(MCOperand::CreateImm(0));
2221 Inst.addOperand(MCOperand::CreateImm(4 << align));
2226 static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Insn,
2227 uint64_t Address, const void *Decoder) {
2228 DecodeStatus S = MCDisassembler::Success;
2230 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2231 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2232 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2233 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2234 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2235 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2237 // First output register
2238 switch (Inst.getOpcode()) {
2239 case ARM::VLD1q16: case ARM::VLD1q32: case ARM::VLD1q64: case ARM::VLD1q8:
2240 case ARM::VLD1q16wb_fixed: case ARM::VLD1q16wb_register:
2241 case ARM::VLD1q32wb_fixed: case ARM::VLD1q32wb_register:
2242 case ARM::VLD1q64wb_fixed: case ARM::VLD1q64wb_register:
2243 case ARM::VLD1q8wb_fixed: case ARM::VLD1q8wb_register:
2244 case ARM::VLD2d16: case ARM::VLD2d32: case ARM::VLD2d8:
2245 case ARM::VLD2d16wb_fixed: case ARM::VLD2d16wb_register:
2246 case ARM::VLD2d32wb_fixed: case ARM::VLD2d32wb_register:
2247 case ARM::VLD2d8wb_fixed: case ARM::VLD2d8wb_register:
2248 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2249 return MCDisassembler::Fail;
2254 case ARM::VLD2b16wb_fixed:
2255 case ARM::VLD2b16wb_register:
2256 case ARM::VLD2b32wb_fixed:
2257 case ARM::VLD2b32wb_register:
2258 case ARM::VLD2b8wb_fixed:
2259 case ARM::VLD2b8wb_register:
2260 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2261 return MCDisassembler::Fail;
2264 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2265 return MCDisassembler::Fail;
2268 // Second output register
2269 switch (Inst.getOpcode()) {
2273 case ARM::VLD3d8_UPD:
2274 case ARM::VLD3d16_UPD:
2275 case ARM::VLD3d32_UPD:
2279 case ARM::VLD4d8_UPD:
2280 case ARM::VLD4d16_UPD:
2281 case ARM::VLD4d32_UPD:
2282 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2283 return MCDisassembler::Fail;
2288 case ARM::VLD3q8_UPD:
2289 case ARM::VLD3q16_UPD:
2290 case ARM::VLD3q32_UPD:
2294 case ARM::VLD4q8_UPD:
2295 case ARM::VLD4q16_UPD:
2296 case ARM::VLD4q32_UPD:
2297 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2298 return MCDisassembler::Fail;
2303 // Third output register
2304 switch(Inst.getOpcode()) {
2308 case ARM::VLD3d8_UPD:
2309 case ARM::VLD3d16_UPD:
2310 case ARM::VLD3d32_UPD:
2314 case ARM::VLD4d8_UPD:
2315 case ARM::VLD4d16_UPD:
2316 case ARM::VLD4d32_UPD:
2317 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2318 return MCDisassembler::Fail;
2323 case ARM::VLD3q8_UPD:
2324 case ARM::VLD3q16_UPD:
2325 case ARM::VLD3q32_UPD:
2329 case ARM::VLD4q8_UPD:
2330 case ARM::VLD4q16_UPD:
2331 case ARM::VLD4q32_UPD:
2332 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2333 return MCDisassembler::Fail;
2339 // Fourth output register
2340 switch (Inst.getOpcode()) {
2344 case ARM::VLD4d8_UPD:
2345 case ARM::VLD4d16_UPD:
2346 case ARM::VLD4d32_UPD:
2347 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2348 return MCDisassembler::Fail;
2353 case ARM::VLD4q8_UPD:
2354 case ARM::VLD4q16_UPD:
2355 case ARM::VLD4q32_UPD:
2356 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2357 return MCDisassembler::Fail;
2363 // Writeback operand
2364 switch (Inst.getOpcode()) {
2365 case ARM::VLD1d8wb_fixed:
2366 case ARM::VLD1d16wb_fixed:
2367 case ARM::VLD1d32wb_fixed:
2368 case ARM::VLD1d64wb_fixed:
2369 case ARM::VLD1d8wb_register:
2370 case ARM::VLD1d16wb_register:
2371 case ARM::VLD1d32wb_register:
2372 case ARM::VLD1d64wb_register:
2373 case ARM::VLD1q8wb_fixed:
2374 case ARM::VLD1q16wb_fixed:
2375 case ARM::VLD1q32wb_fixed:
2376 case ARM::VLD1q64wb_fixed:
2377 case ARM::VLD1q8wb_register:
2378 case ARM::VLD1q16wb_register:
2379 case ARM::VLD1q32wb_register:
2380 case ARM::VLD1q64wb_register:
2381 case ARM::VLD1d8Twb_fixed:
2382 case ARM::VLD1d8Twb_register:
2383 case ARM::VLD1d16Twb_fixed:
2384 case ARM::VLD1d16Twb_register:
2385 case ARM::VLD1d32Twb_fixed:
2386 case ARM::VLD1d32Twb_register:
2387 case ARM::VLD1d64Twb_fixed:
2388 case ARM::VLD1d64Twb_register:
2389 case ARM::VLD1d8Qwb_fixed:
2390 case ARM::VLD1d8Qwb_register:
2391 case ARM::VLD1d16Qwb_fixed:
2392 case ARM::VLD1d16Qwb_register:
2393 case ARM::VLD1d32Qwb_fixed:
2394 case ARM::VLD1d32Qwb_register:
2395 case ARM::VLD1d64Qwb_fixed:
2396 case ARM::VLD1d64Qwb_register:
2397 case ARM::VLD2d8wb_fixed:
2398 case ARM::VLD2d16wb_fixed:
2399 case ARM::VLD2d32wb_fixed:
2400 case ARM::VLD2q8wb_fixed:
2401 case ARM::VLD2q16wb_fixed:
2402 case ARM::VLD2q32wb_fixed:
2403 case ARM::VLD2d8wb_register:
2404 case ARM::VLD2d16wb_register:
2405 case ARM::VLD2d32wb_register:
2406 case ARM::VLD2q8wb_register:
2407 case ARM::VLD2q16wb_register:
2408 case ARM::VLD2q32wb_register:
2409 case ARM::VLD2b8wb_fixed:
2410 case ARM::VLD2b16wb_fixed:
2411 case ARM::VLD2b32wb_fixed:
2412 case ARM::VLD2b8wb_register:
2413 case ARM::VLD2b16wb_register:
2414 case ARM::VLD2b32wb_register:
2415 Inst.addOperand(MCOperand::CreateImm(0));
2417 case ARM::VLD3d8_UPD:
2418 case ARM::VLD3d16_UPD:
2419 case ARM::VLD3d32_UPD:
2420 case ARM::VLD3q8_UPD:
2421 case ARM::VLD3q16_UPD:
2422 case ARM::VLD3q32_UPD:
2423 case ARM::VLD4d8_UPD:
2424 case ARM::VLD4d16_UPD:
2425 case ARM::VLD4d32_UPD:
2426 case ARM::VLD4q8_UPD:
2427 case ARM::VLD4q16_UPD:
2428 case ARM::VLD4q32_UPD:
2429 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2430 return MCDisassembler::Fail;
2436 // AddrMode6 Base (register+alignment)
2437 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2438 return MCDisassembler::Fail;
2440 // AddrMode6 Offset (register)
2441 switch (Inst.getOpcode()) {
2443 // The below have been updated to have explicit am6offset split
2444 // between fixed and register offset. For those instructions not
2445 // yet updated, we need to add an additional reg0 operand for the
2448 // The fixed offset encodes as Rm == 0xd, so we check for that.
2450 Inst.addOperand(MCOperand::CreateReg(0));
2453 // Fall through to handle the register offset variant.
2454 case ARM::VLD1d8wb_fixed:
2455 case ARM::VLD1d16wb_fixed:
2456 case ARM::VLD1d32wb_fixed:
2457 case ARM::VLD1d64wb_fixed:
2458 case ARM::VLD1d8Twb_fixed:
2459 case ARM::VLD1d16Twb_fixed:
2460 case ARM::VLD1d32Twb_fixed:
2461 case ARM::VLD1d64Twb_fixed:
2462 case ARM::VLD1d8Qwb_fixed:
2463 case ARM::VLD1d16Qwb_fixed:
2464 case ARM::VLD1d32Qwb_fixed:
2465 case ARM::VLD1d64Qwb_fixed:
2466 case ARM::VLD1d8wb_register:
2467 case ARM::VLD1d16wb_register:
2468 case ARM::VLD1d32wb_register:
2469 case ARM::VLD1d64wb_register:
2470 case ARM::VLD1q8wb_fixed:
2471 case ARM::VLD1q16wb_fixed:
2472 case ARM::VLD1q32wb_fixed:
2473 case ARM::VLD1q64wb_fixed:
2474 case ARM::VLD1q8wb_register:
2475 case ARM::VLD1q16wb_register:
2476 case ARM::VLD1q32wb_register:
2477 case ARM::VLD1q64wb_register:
2478 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2479 // variant encodes Rm == 0xf. Anything else is a register offset post-
2480 // increment and we need to add the register operand to the instruction.
2481 if (Rm != 0xD && Rm != 0xF &&
2482 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2483 return MCDisassembler::Fail;
2485 case ARM::VLD2d8wb_fixed:
2486 case ARM::VLD2d16wb_fixed:
2487 case ARM::VLD2d32wb_fixed:
2488 case ARM::VLD2b8wb_fixed:
2489 case ARM::VLD2b16wb_fixed:
2490 case ARM::VLD2b32wb_fixed:
2491 case ARM::VLD2q8wb_fixed:
2492 case ARM::VLD2q16wb_fixed:
2493 case ARM::VLD2q32wb_fixed:
2500 static DecodeStatus DecodeVLDST1Instruction(MCInst &Inst, unsigned Insn,
2501 uint64_t Address, const void *Decoder) {
2502 unsigned type = fieldFromInstruction(Insn, 8, 4);
2503 unsigned align = fieldFromInstruction(Insn, 4, 2);
2504 if (type == 6 && (align & 2)) return MCDisassembler::Fail;
2505 if (type == 7 && (align & 2)) return MCDisassembler::Fail;
2506 if (type == 10 && align == 3) return MCDisassembler::Fail;
2508 unsigned load = fieldFromInstruction(Insn, 21, 1);
2509 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
2510 : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
2513 static DecodeStatus DecodeVLDST2Instruction(MCInst &Inst, unsigned Insn,
2514 uint64_t Address, const void *Decoder) {
2515 unsigned size = fieldFromInstruction(Insn, 6, 2);
2516 if (size == 3) return MCDisassembler::Fail;
2518 unsigned type = fieldFromInstruction(Insn, 8, 4);
2519 unsigned align = fieldFromInstruction(Insn, 4, 2);
2520 if (type == 8 && align == 3) return MCDisassembler::Fail;
2521 if (type == 9 && align == 3) return MCDisassembler::Fail;
2523 unsigned load = fieldFromInstruction(Insn, 21, 1);
2524 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
2525 : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
2528 static DecodeStatus DecodeVLDST3Instruction(MCInst &Inst, unsigned Insn,
2529 uint64_t Address, const void *Decoder) {
2530 unsigned size = fieldFromInstruction(Insn, 6, 2);
2531 if (size == 3) return MCDisassembler::Fail;
2533 unsigned align = fieldFromInstruction(Insn, 4, 2);
2534 if (align & 2) return MCDisassembler::Fail;
2536 unsigned load = fieldFromInstruction(Insn, 21, 1);
2537 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
2538 : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
2541 static DecodeStatus DecodeVLDST4Instruction(MCInst &Inst, unsigned Insn,
2542 uint64_t Address, const void *Decoder) {
2543 unsigned size = fieldFromInstruction(Insn, 6, 2);
2544 if (size == 3) return MCDisassembler::Fail;
2546 unsigned load = fieldFromInstruction(Insn, 21, 1);
2547 return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
2548 : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
2551 static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Insn,
2552 uint64_t Address, const void *Decoder) {
2553 DecodeStatus S = MCDisassembler::Success;
2555 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2556 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2557 unsigned wb = fieldFromInstruction(Insn, 16, 4);
2558 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2559 Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
2560 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2562 // Writeback Operand
2563 switch (Inst.getOpcode()) {
2564 case ARM::VST1d8wb_fixed:
2565 case ARM::VST1d16wb_fixed:
2566 case ARM::VST1d32wb_fixed:
2567 case ARM::VST1d64wb_fixed:
2568 case ARM::VST1d8wb_register:
2569 case ARM::VST1d16wb_register:
2570 case ARM::VST1d32wb_register:
2571 case ARM::VST1d64wb_register:
2572 case ARM::VST1q8wb_fixed:
2573 case ARM::VST1q16wb_fixed:
2574 case ARM::VST1q32wb_fixed:
2575 case ARM::VST1q64wb_fixed:
2576 case ARM::VST1q8wb_register:
2577 case ARM::VST1q16wb_register:
2578 case ARM::VST1q32wb_register:
2579 case ARM::VST1q64wb_register:
2580 case ARM::VST1d8Twb_fixed:
2581 case ARM::VST1d16Twb_fixed:
2582 case ARM::VST1d32Twb_fixed:
2583 case ARM::VST1d64Twb_fixed:
2584 case ARM::VST1d8Twb_register:
2585 case ARM::VST1d16Twb_register:
2586 case ARM::VST1d32Twb_register:
2587 case ARM::VST1d64Twb_register:
2588 case ARM::VST1d8Qwb_fixed:
2589 case ARM::VST1d16Qwb_fixed:
2590 case ARM::VST1d32Qwb_fixed:
2591 case ARM::VST1d64Qwb_fixed:
2592 case ARM::VST1d8Qwb_register:
2593 case ARM::VST1d16Qwb_register:
2594 case ARM::VST1d32Qwb_register:
2595 case ARM::VST1d64Qwb_register:
2596 case ARM::VST2d8wb_fixed:
2597 case ARM::VST2d16wb_fixed:
2598 case ARM::VST2d32wb_fixed:
2599 case ARM::VST2d8wb_register:
2600 case ARM::VST2d16wb_register:
2601 case ARM::VST2d32wb_register:
2602 case ARM::VST2q8wb_fixed:
2603 case ARM::VST2q16wb_fixed:
2604 case ARM::VST2q32wb_fixed:
2605 case ARM::VST2q8wb_register:
2606 case ARM::VST2q16wb_register:
2607 case ARM::VST2q32wb_register:
2608 case ARM::VST2b8wb_fixed:
2609 case ARM::VST2b16wb_fixed:
2610 case ARM::VST2b32wb_fixed:
2611 case ARM::VST2b8wb_register:
2612 case ARM::VST2b16wb_register:
2613 case ARM::VST2b32wb_register:
2615 return MCDisassembler::Fail;
2616 Inst.addOperand(MCOperand::CreateImm(0));
2618 case ARM::VST3d8_UPD:
2619 case ARM::VST3d16_UPD:
2620 case ARM::VST3d32_UPD:
2621 case ARM::VST3q8_UPD:
2622 case ARM::VST3q16_UPD:
2623 case ARM::VST3q32_UPD:
2624 case ARM::VST4d8_UPD:
2625 case ARM::VST4d16_UPD:
2626 case ARM::VST4d32_UPD:
2627 case ARM::VST4q8_UPD:
2628 case ARM::VST4q16_UPD:
2629 case ARM::VST4q32_UPD:
2630 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
2631 return MCDisassembler::Fail;
2637 // AddrMode6 Base (register+alignment)
2638 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2639 return MCDisassembler::Fail;
2641 // AddrMode6 Offset (register)
2642 switch (Inst.getOpcode()) {
2645 Inst.addOperand(MCOperand::CreateReg(0));
2646 else if (Rm != 0xF) {
2647 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2648 return MCDisassembler::Fail;
2651 case ARM::VST1d8wb_fixed:
2652 case ARM::VST1d16wb_fixed:
2653 case ARM::VST1d32wb_fixed:
2654 case ARM::VST1d64wb_fixed:
2655 case ARM::VST1q8wb_fixed:
2656 case ARM::VST1q16wb_fixed:
2657 case ARM::VST1q32wb_fixed:
2658 case ARM::VST1q64wb_fixed:
2659 case ARM::VST1d8Twb_fixed:
2660 case ARM::VST1d16Twb_fixed:
2661 case ARM::VST1d32Twb_fixed:
2662 case ARM::VST1d64Twb_fixed:
2663 case ARM::VST1d8Qwb_fixed:
2664 case ARM::VST1d16Qwb_fixed:
2665 case ARM::VST1d32Qwb_fixed:
2666 case ARM::VST1d64Qwb_fixed:
2667 case ARM::VST2d8wb_fixed:
2668 case ARM::VST2d16wb_fixed:
2669 case ARM::VST2d32wb_fixed:
2670 case ARM::VST2q8wb_fixed:
2671 case ARM::VST2q16wb_fixed:
2672 case ARM::VST2q32wb_fixed:
2673 case ARM::VST2b8wb_fixed:
2674 case ARM::VST2b16wb_fixed:
2675 case ARM::VST2b32wb_fixed:
2680 // First input register
2681 switch (Inst.getOpcode()) {
2686 case ARM::VST1q16wb_fixed:
2687 case ARM::VST1q16wb_register:
2688 case ARM::VST1q32wb_fixed:
2689 case ARM::VST1q32wb_register:
2690 case ARM::VST1q64wb_fixed:
2691 case ARM::VST1q64wb_register:
2692 case ARM::VST1q8wb_fixed:
2693 case ARM::VST1q8wb_register:
2697 case ARM::VST2d16wb_fixed:
2698 case ARM::VST2d16wb_register:
2699 case ARM::VST2d32wb_fixed:
2700 case ARM::VST2d32wb_register:
2701 case ARM::VST2d8wb_fixed:
2702 case ARM::VST2d8wb_register:
2703 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2704 return MCDisassembler::Fail;
2709 case ARM::VST2b16wb_fixed:
2710 case ARM::VST2b16wb_register:
2711 case ARM::VST2b32wb_fixed:
2712 case ARM::VST2b32wb_register:
2713 case ARM::VST2b8wb_fixed:
2714 case ARM::VST2b8wb_register:
2715 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2716 return MCDisassembler::Fail;
2719 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2720 return MCDisassembler::Fail;
2723 // Second input register
2724 switch (Inst.getOpcode()) {
2728 case ARM::VST3d8_UPD:
2729 case ARM::VST3d16_UPD:
2730 case ARM::VST3d32_UPD:
2734 case ARM::VST4d8_UPD:
2735 case ARM::VST4d16_UPD:
2736 case ARM::VST4d32_UPD:
2737 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2738 return MCDisassembler::Fail;
2743 case ARM::VST3q8_UPD:
2744 case ARM::VST3q16_UPD:
2745 case ARM::VST3q32_UPD:
2749 case ARM::VST4q8_UPD:
2750 case ARM::VST4q16_UPD:
2751 case ARM::VST4q32_UPD:
2752 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2753 return MCDisassembler::Fail;
2759 // Third input register
2760 switch (Inst.getOpcode()) {
2764 case ARM::VST3d8_UPD:
2765 case ARM::VST3d16_UPD:
2766 case ARM::VST3d32_UPD:
2770 case ARM::VST4d8_UPD:
2771 case ARM::VST4d16_UPD:
2772 case ARM::VST4d32_UPD:
2773 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2774 return MCDisassembler::Fail;
2779 case ARM::VST3q8_UPD:
2780 case ARM::VST3q16_UPD:
2781 case ARM::VST3q32_UPD:
2785 case ARM::VST4q8_UPD:
2786 case ARM::VST4q16_UPD:
2787 case ARM::VST4q32_UPD:
2788 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2789 return MCDisassembler::Fail;
2795 // Fourth input register
2796 switch (Inst.getOpcode()) {
2800 case ARM::VST4d8_UPD:
2801 case ARM::VST4d16_UPD:
2802 case ARM::VST4d32_UPD:
2803 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2804 return MCDisassembler::Fail;
2809 case ARM::VST4q8_UPD:
2810 case ARM::VST4q16_UPD:
2811 case ARM::VST4q32_UPD:
2812 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2813 return MCDisassembler::Fail;
2822 static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Insn,
2823 uint64_t Address, const void *Decoder) {
2824 DecodeStatus S = MCDisassembler::Success;
2826 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2827 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2828 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2829 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2830 unsigned align = fieldFromInstruction(Insn, 4, 1);
2831 unsigned size = fieldFromInstruction(Insn, 6, 2);
2833 if (size == 0 && align == 1)
2834 return MCDisassembler::Fail;
2835 align *= (1 << size);
2837 switch (Inst.getOpcode()) {
2838 case ARM::VLD1DUPq16: case ARM::VLD1DUPq32: case ARM::VLD1DUPq8:
2839 case ARM::VLD1DUPq16wb_fixed: case ARM::VLD1DUPq16wb_register:
2840 case ARM::VLD1DUPq32wb_fixed: case ARM::VLD1DUPq32wb_register:
2841 case ARM::VLD1DUPq8wb_fixed: case ARM::VLD1DUPq8wb_register:
2842 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2843 return MCDisassembler::Fail;
2846 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2847 return MCDisassembler::Fail;
2851 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2852 return MCDisassembler::Fail;
2855 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2856 return MCDisassembler::Fail;
2857 Inst.addOperand(MCOperand::CreateImm(align));
2859 // The fixed offset post-increment encodes Rm == 0xd. The no-writeback
2860 // variant encodes Rm == 0xf. Anything else is a register offset post-
2861 // increment and we need to add the register operand to the instruction.
2862 if (Rm != 0xD && Rm != 0xF &&
2863 !Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2864 return MCDisassembler::Fail;
2869 static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Insn,
2870 uint64_t Address, const void *Decoder) {
2871 DecodeStatus S = MCDisassembler::Success;
2873 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2874 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2875 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2876 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2877 unsigned align = fieldFromInstruction(Insn, 4, 1);
2878 unsigned size = 1 << fieldFromInstruction(Insn, 6, 2);
2881 switch (Inst.getOpcode()) {
2882 case ARM::VLD2DUPd16: case ARM::VLD2DUPd32: case ARM::VLD2DUPd8:
2883 case ARM::VLD2DUPd16wb_fixed: case ARM::VLD2DUPd16wb_register:
2884 case ARM::VLD2DUPd32wb_fixed: case ARM::VLD2DUPd32wb_register:
2885 case ARM::VLD2DUPd8wb_fixed: case ARM::VLD2DUPd8wb_register:
2886 if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
2887 return MCDisassembler::Fail;
2889 case ARM::VLD2DUPd16x2: case ARM::VLD2DUPd32x2: case ARM::VLD2DUPd8x2:
2890 case ARM::VLD2DUPd16x2wb_fixed: case ARM::VLD2DUPd16x2wb_register:
2891 case ARM::VLD2DUPd32x2wb_fixed: case ARM::VLD2DUPd32x2wb_register:
2892 case ARM::VLD2DUPd8x2wb_fixed: case ARM::VLD2DUPd8x2wb_register:
2893 if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
2894 return MCDisassembler::Fail;
2897 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2898 return MCDisassembler::Fail;
2903 Inst.addOperand(MCOperand::CreateImm(0));
2905 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2906 return MCDisassembler::Fail;
2907 Inst.addOperand(MCOperand::CreateImm(align));
2909 if (Rm != 0xD && Rm != 0xF) {
2910 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2911 return MCDisassembler::Fail;
2917 static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Insn,
2918 uint64_t Address, const void *Decoder) {
2919 DecodeStatus S = MCDisassembler::Success;
2921 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2922 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2923 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2924 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2925 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
2927 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2928 return MCDisassembler::Fail;
2929 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2930 return MCDisassembler::Fail;
2931 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2932 return MCDisassembler::Fail;
2934 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2935 return MCDisassembler::Fail;
2938 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2939 return MCDisassembler::Fail;
2940 Inst.addOperand(MCOperand::CreateImm(0));
2943 Inst.addOperand(MCOperand::CreateReg(0));
2944 else if (Rm != 0xF) {
2945 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2946 return MCDisassembler::Fail;
2952 static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Insn,
2953 uint64_t Address, const void *Decoder) {
2954 DecodeStatus S = MCDisassembler::Success;
2956 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
2957 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
2958 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
2959 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
2960 unsigned size = fieldFromInstruction(Insn, 6, 2);
2961 unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
2962 unsigned align = fieldFromInstruction(Insn, 4, 1);
2966 return MCDisassembler::Fail;
2979 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2980 return MCDisassembler::Fail;
2981 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2982 return MCDisassembler::Fail;
2983 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2984 return MCDisassembler::Fail;
2985 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
2986 return MCDisassembler::Fail;
2988 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2989 return MCDisassembler::Fail;
2992 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2993 return MCDisassembler::Fail;
2994 Inst.addOperand(MCOperand::CreateImm(align));
2997 Inst.addOperand(MCOperand::CreateReg(0));
2998 else if (Rm != 0xF) {
2999 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3000 return MCDisassembler::Fail;
3007 DecodeNEONModImmInstruction(MCInst &Inst, unsigned Insn,
3008 uint64_t Address, const void *Decoder) {
3009 DecodeStatus S = MCDisassembler::Success;
3011 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3012 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3013 unsigned imm = fieldFromInstruction(Insn, 0, 4);
3014 imm |= fieldFromInstruction(Insn, 16, 3) << 4;
3015 imm |= fieldFromInstruction(Insn, 24, 1) << 7;
3016 imm |= fieldFromInstruction(Insn, 8, 4) << 8;
3017 imm |= fieldFromInstruction(Insn, 5, 1) << 12;
3018 unsigned Q = fieldFromInstruction(Insn, 6, 1);
3021 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
3022 return MCDisassembler::Fail;
3024 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3025 return MCDisassembler::Fail;
3028 Inst.addOperand(MCOperand::CreateImm(imm));
3030 switch (Inst.getOpcode()) {
3031 case ARM::VORRiv4i16:
3032 case ARM::VORRiv2i32:
3033 case ARM::VBICiv4i16:
3034 case ARM::VBICiv2i32:
3035 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3036 return MCDisassembler::Fail;
3038 case ARM::VORRiv8i16:
3039 case ARM::VORRiv4i32:
3040 case ARM::VBICiv8i16:
3041 case ARM::VBICiv4i32:
3042 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
3043 return MCDisassembler::Fail;
3052 static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Insn,
3053 uint64_t Address, const void *Decoder) {
3054 DecodeStatus S = MCDisassembler::Success;
3056 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3057 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3058 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3059 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
3060 unsigned size = fieldFromInstruction(Insn, 18, 2);
3062 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
3063 return MCDisassembler::Fail;
3064 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
3065 return MCDisassembler::Fail;
3066 Inst.addOperand(MCOperand::CreateImm(8 << size));
3071 static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
3072 uint64_t Address, const void *Decoder) {
3073 Inst.addOperand(MCOperand::CreateImm(8 - Val));
3074 return MCDisassembler::Success;
3077 static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
3078 uint64_t Address, const void *Decoder) {
3079 Inst.addOperand(MCOperand::CreateImm(16 - Val));
3080 return MCDisassembler::Success;
3083 static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
3084 uint64_t Address, const void *Decoder) {
3085 Inst.addOperand(MCOperand::CreateImm(32 - Val));
3086 return MCDisassembler::Success;
3089 static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
3090 uint64_t Address, const void *Decoder) {
3091 Inst.addOperand(MCOperand::CreateImm(64 - Val));
3092 return MCDisassembler::Success;
3095 static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
3096 uint64_t Address, const void *Decoder) {
3097 DecodeStatus S = MCDisassembler::Success;
3099 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3100 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
3101 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3102 Rn |= fieldFromInstruction(Insn, 7, 1) << 4;
3103 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3104 Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
3105 unsigned op = fieldFromInstruction(Insn, 6, 1);
3107 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3108 return MCDisassembler::Fail;
3110 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3111 return MCDisassembler::Fail; // Writeback
3114 switch (Inst.getOpcode()) {
3117 if (!Check(S, DecodeDPairRegisterClass(Inst, Rn, Address, Decoder)))
3118 return MCDisassembler::Fail;
3121 if (!Check(S, DecodeDPRRegisterClass(Inst, Rn, Address, Decoder)))
3122 return MCDisassembler::Fail;
3125 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
3126 return MCDisassembler::Fail;
3131 static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
3132 uint64_t Address, const void *Decoder) {
3133 DecodeStatus S = MCDisassembler::Success;
3135 unsigned dst = fieldFromInstruction(Insn, 8, 3);
3136 unsigned imm = fieldFromInstruction(Insn, 0, 8);
3138 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
3139 return MCDisassembler::Fail;
3141 switch(Inst.getOpcode()) {
3143 return MCDisassembler::Fail;
3145 break; // tADR does not explicitly represent the PC as an operand.
3147 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3151 Inst.addOperand(MCOperand::CreateImm(imm));
3155 static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
3156 uint64_t Address, const void *Decoder) {
3157 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<12>(Val<<1) + 4,
3158 true, 2, Inst, Decoder))
3159 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
3160 return MCDisassembler::Success;
3163 static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
3164 uint64_t Address, const void *Decoder) {
3165 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<21>(Val) + 4,
3166 true, 4, Inst, Decoder))
3167 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
3168 return MCDisassembler::Success;
3171 static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
3172 uint64_t Address, const void *Decoder) {
3173 if (!tryAddingSymbolicOperand(Address, Address + (Val<<1) + 4,
3174 true, 2, Inst, Decoder))
3175 Inst.addOperand(MCOperand::CreateImm(Val << 1));
3176 return MCDisassembler::Success;
3179 static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
3180 uint64_t Address, const void *Decoder) {
3181 DecodeStatus S = MCDisassembler::Success;
3183 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3184 unsigned Rm = fieldFromInstruction(Val, 3, 3);
3186 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3187 return MCDisassembler::Fail;
3188 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
3189 return MCDisassembler::Fail;
3194 static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
3195 uint64_t Address, const void *Decoder) {
3196 DecodeStatus S = MCDisassembler::Success;
3198 unsigned Rn = fieldFromInstruction(Val, 0, 3);
3199 unsigned imm = fieldFromInstruction(Val, 3, 5);
3201 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
3202 return MCDisassembler::Fail;
3203 Inst.addOperand(MCOperand::CreateImm(imm));
3208 static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
3209 uint64_t Address, const void *Decoder) {
3210 unsigned imm = Val << 2;
3212 Inst.addOperand(MCOperand::CreateImm(imm));
3213 tryAddingPcLoadReferenceComment(Address, (Address & ~2u) + imm + 4, Decoder);
3215 return MCDisassembler::Success;
3218 static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
3219 uint64_t Address, const void *Decoder) {
3220 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3221 Inst.addOperand(MCOperand::CreateImm(Val));
3223 return MCDisassembler::Success;
3226 static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
3227 uint64_t Address, const void *Decoder) {
3228 DecodeStatus S = MCDisassembler::Success;
3230 unsigned Rn = fieldFromInstruction(Val, 6, 4);
3231 unsigned Rm = fieldFromInstruction(Val, 2, 4);
3232 unsigned imm = fieldFromInstruction(Val, 0, 2);
3234 // Thumb stores cannot use PC as dest register.
3235 switch (Inst.getOpcode()) {
3240 return MCDisassembler::Fail;
3245 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3246 return MCDisassembler::Fail;
3247 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3248 return MCDisassembler::Fail;
3249 Inst.addOperand(MCOperand::CreateImm(imm));
3254 static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Insn,
3255 uint64_t Address, const void *Decoder) {
3256 DecodeStatus S = MCDisassembler::Success;
3258 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3259 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3262 switch (Inst.getOpcode()) {
3264 Inst.setOpcode(ARM::t2LDRBpci);
3267 Inst.setOpcode(ARM::t2LDRHpci);
3270 Inst.setOpcode(ARM::t2LDRSHpci);
3273 Inst.setOpcode(ARM::t2LDRSBpci);
3276 Inst.setOpcode(ARM::t2LDRpci);
3279 Inst.setOpcode(ARM::t2PLDpci);
3282 Inst.setOpcode(ARM::t2PLIpci);
3285 return MCDisassembler::Fail;
3288 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3292 switch (Inst.getOpcode()) {
3294 return MCDisassembler::Fail;
3296 // FIXME: this instruction is only available with MP extensions,
3297 // this should be checked first but we don't have access to the
3298 // feature bits here.
3299 Inst.setOpcode(ARM::t2PLDWs);
3306 switch (Inst.getOpcode()) {
3312 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3313 return MCDisassembler::Fail;
3316 unsigned addrmode = fieldFromInstruction(Insn, 4, 2);
3317 addrmode |= fieldFromInstruction(Insn, 0, 4) << 2;
3318 addrmode |= fieldFromInstruction(Insn, 16, 4) << 6;
3319 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
3320 return MCDisassembler::Fail;
3325 static DecodeStatus DecodeT2LoadImm8(MCInst &Inst, unsigned Insn,
3326 uint64_t Address, const void* Decoder) {
3327 DecodeStatus S = MCDisassembler::Success;
3329 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3330 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3331 unsigned U = fieldFromInstruction(Insn, 9, 1);
3332 unsigned imm = fieldFromInstruction(Insn, 0, 8);
3337 switch (Inst.getOpcode()) {
3339 Inst.setOpcode(ARM::t2LDRpci);
3342 Inst.setOpcode(ARM::t2LDRBpci);
3344 case ARM::t2LDRSBi8:
3345 Inst.setOpcode(ARM::t2LDRSBpci);
3348 Inst.setOpcode(ARM::t2LDRHpci);
3350 case ARM::t2LDRSHi8:
3351 Inst.setOpcode(ARM::t2LDRSHpci);
3354 Inst.setOpcode(ARM::t2PLDpci);
3357 Inst.setOpcode(ARM::t2PLIpci);
3360 return MCDisassembler::Fail;
3362 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3366 switch (Inst.getOpcode()) {
3367 case ARM::t2LDRSHi8:
3368 return MCDisassembler::Fail;
3374 switch (Inst.getOpcode()) {
3380 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3381 return MCDisassembler::Fail;
3384 if (!Check(S, DecodeT2AddrModeImm8(Inst, imm, Address, Decoder)))
3385 return MCDisassembler::Fail;
3389 static DecodeStatus DecodeT2LoadImm12(MCInst &Inst, unsigned Insn,
3390 uint64_t Address, const void* Decoder) {
3391 DecodeStatus S = MCDisassembler::Success;
3393 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3394 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3395 unsigned imm = fieldFromInstruction(Insn, 0, 12);
3399 switch (Inst.getOpcode()) {
3401 Inst.setOpcode(ARM::t2LDRpci);
3403 case ARM::t2LDRHi12:
3404 Inst.setOpcode(ARM::t2LDRHpci);
3406 case ARM::t2LDRSHi12:
3407 Inst.setOpcode(ARM::t2LDRSHpci);
3409 case ARM::t2LDRBi12:
3410 Inst.setOpcode(ARM::t2LDRBpci);
3412 case ARM::t2LDRSBi12:
3413 Inst.setOpcode(ARM::t2LDRSBpci);
3416 Inst.setOpcode(ARM::t2PLDpci);
3419 Inst.setOpcode(ARM::t2PLIpci);
3422 return MCDisassembler::Fail;
3424 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3428 switch (Inst.getOpcode()) {
3429 case ARM::t2LDRSHi12:
3430 return MCDisassembler::Fail;
3431 case ARM::t2LDRHi12:
3432 Inst.setOpcode(ARM::t2PLDi12);
3439 switch (Inst.getOpcode()) {
3441 case ARM::t2PLDWi12:
3445 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3446 return MCDisassembler::Fail;
3449 if (!Check(S, DecodeT2AddrModeImm12(Inst, imm, Address, Decoder)))
3450 return MCDisassembler::Fail;
3454 static DecodeStatus DecodeT2LoadT(MCInst &Inst, unsigned Insn,
3455 uint64_t Address, const void* Decoder) {
3456 DecodeStatus S = MCDisassembler::Success;
3458 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3459 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3460 unsigned imm = fieldFromInstruction(Insn, 0, 8);
3464 switch (Inst.getOpcode()) {
3466 Inst.setOpcode(ARM::t2LDRpci);
3469 Inst.setOpcode(ARM::t2LDRBpci);
3472 Inst.setOpcode(ARM::t2LDRHpci);
3475 Inst.setOpcode(ARM::t2LDRSBpci);
3478 Inst.setOpcode(ARM::t2LDRSHpci);
3481 return MCDisassembler::Fail;
3483 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3486 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3487 return MCDisassembler::Fail;
3488 if (!Check(S, DecodeT2AddrModeImm8(Inst, imm, Address, Decoder)))
3489 return MCDisassembler::Fail;
3493 static DecodeStatus DecodeT2LoadLabel(MCInst &Inst, unsigned Insn,
3494 uint64_t Address, const void* Decoder) {
3495 DecodeStatus S = MCDisassembler::Success;
3497 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3498 unsigned U = fieldFromInstruction(Insn, 23, 1);
3499 int imm = fieldFromInstruction(Insn, 0, 12);
3502 switch (Inst.getOpcode()) {
3503 case ARM::t2LDRBpci:
3504 case ARM::t2LDRHpci:
3505 Inst.setOpcode(ARM::t2PLDpci);
3507 case ARM::t2LDRSBpci:
3508 Inst.setOpcode(ARM::t2PLIpci);
3510 case ARM::t2LDRSHpci:
3511 return MCDisassembler::Fail;
3517 switch(Inst.getOpcode()) {
3522 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3523 return MCDisassembler::Fail;
3527 // Special case for #-0.
3533 Inst.addOperand(MCOperand::CreateImm(imm));
3538 static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
3539 uint64_t Address, const void *Decoder) {
3541 Inst.addOperand(MCOperand::CreateImm(INT32_MIN));
3543 int imm = Val & 0xFF;
3545 if (!(Val & 0x100)) imm *= -1;
3546 Inst.addOperand(MCOperand::CreateImm(imm * 4));
3549 return MCDisassembler::Success;
3552 static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
3553 uint64_t Address, const void *Decoder) {
3554 DecodeStatus S = MCDisassembler::Success;
3556 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3557 unsigned imm = fieldFromInstruction(Val, 0, 9);
3559 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3560 return MCDisassembler::Fail;
3561 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
3562 return MCDisassembler::Fail;
3567 static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
3568 uint64_t Address, const void *Decoder) {
3569 DecodeStatus S = MCDisassembler::Success;
3571 unsigned Rn = fieldFromInstruction(Val, 8, 4);
3572 unsigned imm = fieldFromInstruction(Val, 0, 8);
3574 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
3575 return MCDisassembler::Fail;
3577 Inst.addOperand(MCOperand::CreateImm(imm));
3582 static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
3583 uint64_t Address, const void *Decoder) {
3584 int imm = Val & 0xFF;
3587 else if (!(Val & 0x100))
3589 Inst.addOperand(MCOperand::CreateImm(imm));
3591 return MCDisassembler::Success;
3595 static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
3596 uint64_t Address, const void *Decoder) {
3597 DecodeStatus S = MCDisassembler::Success;
3599 unsigned Rn = fieldFromInstruction(Val, 9, 4);
3600 unsigned imm = fieldFromInstruction(Val, 0, 9);
3602 // Thumb stores cannot use PC as dest register.
3603 switch (Inst.getOpcode()) {
3611 return MCDisassembler::Fail;
3617 // Some instructions always use an additive offset.
3618 switch (Inst.getOpcode()) {
3633 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3634 return MCDisassembler::Fail;
3635 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
3636 return MCDisassembler::Fail;
3641 static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Insn,
3642 uint64_t Address, const void *Decoder) {
3643 DecodeStatus S = MCDisassembler::Success;
3645 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3646 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3647 unsigned addr = fieldFromInstruction(Insn, 0, 8);
3648 addr |= fieldFromInstruction(Insn, 9, 1) << 8;
3650 unsigned load = fieldFromInstruction(Insn, 20, 1);
3653 switch (Inst.getOpcode()) {
3654 case ARM::t2LDR_PRE:
3655 case ARM::t2LDR_POST:
3656 Inst.setOpcode(ARM::t2LDRpci);
3658 case ARM::t2LDRB_PRE:
3659 case ARM::t2LDRB_POST:
3660 Inst.setOpcode(ARM::t2LDRBpci);
3662 case ARM::t2LDRH_PRE:
3663 case ARM::t2LDRH_POST:
3664 Inst.setOpcode(ARM::t2LDRHpci);
3666 case ARM::t2LDRSB_PRE:
3667 case ARM::t2LDRSB_POST:
3669 Inst.setOpcode(ARM::t2PLIpci);
3671 Inst.setOpcode(ARM::t2LDRSBpci);
3673 case ARM::t2LDRSH_PRE:
3674 case ARM::t2LDRSH_POST:
3675 Inst.setOpcode(ARM::t2LDRSHpci);
3678 return MCDisassembler::Fail;
3680 return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
3684 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3685 return MCDisassembler::Fail;
3688 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3689 return MCDisassembler::Fail;
3692 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3693 return MCDisassembler::Fail;
3696 if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
3697 return MCDisassembler::Fail;
3702 static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
3703 uint64_t Address, const void *Decoder) {
3704 DecodeStatus S = MCDisassembler::Success;
3706 unsigned Rn = fieldFromInstruction(Val, 13, 4);
3707 unsigned imm = fieldFromInstruction(Val, 0, 12);
3709 // Thumb stores cannot use PC as dest register.
3710 switch (Inst.getOpcode()) {
3712 case ARM::t2STRBi12:
3713 case ARM::t2STRHi12:
3715 return MCDisassembler::Fail;
3720 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3721 return MCDisassembler::Fail;
3722 Inst.addOperand(MCOperand::CreateImm(imm));
3728 static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Insn,
3729 uint64_t Address, const void *Decoder) {
3730 unsigned imm = fieldFromInstruction(Insn, 0, 7);
3732 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3733 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3734 Inst.addOperand(MCOperand::CreateImm(imm));
3736 return MCDisassembler::Success;
3739 static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
3740 uint64_t Address, const void *Decoder) {
3741 DecodeStatus S = MCDisassembler::Success;
3743 if (Inst.getOpcode() == ARM::tADDrSP) {
3744 unsigned Rdm = fieldFromInstruction(Insn, 0, 3);
3745 Rdm |= fieldFromInstruction(Insn, 7, 1) << 3;
3747 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3748 return MCDisassembler::Fail;
3749 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3750 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
3751 return MCDisassembler::Fail;
3752 } else if (Inst.getOpcode() == ARM::tADDspr) {
3753 unsigned Rm = fieldFromInstruction(Insn, 3, 4);
3755 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3756 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
3757 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3758 return MCDisassembler::Fail;
3764 static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
3765 uint64_t Address, const void *Decoder) {
3766 unsigned imod = fieldFromInstruction(Insn, 4, 1) | 0x2;
3767 unsigned flags = fieldFromInstruction(Insn, 0, 3);
3769 Inst.addOperand(MCOperand::CreateImm(imod));
3770 Inst.addOperand(MCOperand::CreateImm(flags));
3772 return MCDisassembler::Success;
3775 static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
3776 uint64_t Address, const void *Decoder) {
3777 DecodeStatus S = MCDisassembler::Success;
3778 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3779 unsigned add = fieldFromInstruction(Insn, 4, 1);
3781 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
3782 return MCDisassembler::Fail;
3783 Inst.addOperand(MCOperand::CreateImm(add));
3788 static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Val,
3789 uint64_t Address, const void *Decoder) {
3790 // Val is passed in as S:J1:J2:imm10H:imm10L:'0'
3791 // Note only one trailing zero not two. Also the J1 and J2 values are from
3792 // the encoded instruction. So here change to I1 and I2 values via:
3793 // I1 = NOT(J1 EOR S);
3794 // I2 = NOT(J2 EOR S);
3795 // and build the imm32 with two trailing zeros as documented:
3796 // imm32 = SignExtend(S:I1:I2:imm10H:imm10L:'00', 32);
3797 unsigned S = (Val >> 23) & 1;
3798 unsigned J1 = (Val >> 22) & 1;
3799 unsigned J2 = (Val >> 21) & 1;
3800 unsigned I1 = !(J1 ^ S);
3801 unsigned I2 = !(J2 ^ S);
3802 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
3803 int imm32 = SignExtend32<25>(tmp << 1);
3805 if (!tryAddingSymbolicOperand(Address,
3806 (Address & ~2u) + imm32 + 4,
3807 true, 4, Inst, Decoder))
3808 Inst.addOperand(MCOperand::CreateImm(imm32));
3809 return MCDisassembler::Success;
3812 static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Val,
3813 uint64_t Address, const void *Decoder) {
3814 if (Val == 0xA || Val == 0xB)
3815 return MCDisassembler::Fail;
3817 Inst.addOperand(MCOperand::CreateImm(Val));
3818 return MCDisassembler::Success;
3822 DecodeThumbTableBranch(MCInst &Inst, unsigned Insn,
3823 uint64_t Address, const void *Decoder) {
3824 DecodeStatus S = MCDisassembler::Success;
3826 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3827 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
3829 if (Rn == ARM::SP) S = MCDisassembler::SoftFail;
3830 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3831 return MCDisassembler::Fail;
3832 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
3833 return MCDisassembler::Fail;
3838 DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Insn,
3839 uint64_t Address, const void *Decoder) {
3840 DecodeStatus S = MCDisassembler::Success;
3842 unsigned pred = fieldFromInstruction(Insn, 22, 4);
3843 if (pred == 0xE || pred == 0xF) {
3844 unsigned opc = fieldFromInstruction(Insn, 4, 28);
3847 return MCDisassembler::Fail;
3849 Inst.setOpcode(ARM::t2DSB);
3852 Inst.setOpcode(ARM::t2DMB);
3855 Inst.setOpcode(ARM::t2ISB);
3859 unsigned imm = fieldFromInstruction(Insn, 0, 4);
3860 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
3863 unsigned brtarget = fieldFromInstruction(Insn, 0, 11) << 1;
3864 brtarget |= fieldFromInstruction(Insn, 11, 1) << 19;
3865 brtarget |= fieldFromInstruction(Insn, 13, 1) << 18;
3866 brtarget |= fieldFromInstruction(Insn, 16, 6) << 12;
3867 brtarget |= fieldFromInstruction(Insn, 26, 1) << 20;
3869 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
3870 return MCDisassembler::Fail;
3871 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3872 return MCDisassembler::Fail;
3877 // Decode a shifted immediate operand. These basically consist
3878 // of an 8-bit value, and a 4-bit directive that specifies either
3879 // a splat operation or a rotation.
3880 static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
3881 uint64_t Address, const void *Decoder) {
3882 unsigned ctrl = fieldFromInstruction(Val, 10, 2);
3884 unsigned byte = fieldFromInstruction(Val, 8, 2);
3885 unsigned imm = fieldFromInstruction(Val, 0, 8);
3888 Inst.addOperand(MCOperand::CreateImm(imm));
3891 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
3894 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
3897 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
3902 unsigned unrot = fieldFromInstruction(Val, 0, 7) | 0x80;
3903 unsigned rot = fieldFromInstruction(Val, 7, 5);
3904 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
3905 Inst.addOperand(MCOperand::CreateImm(imm));
3908 return MCDisassembler::Success;
3912 DecodeThumbBCCTargetOperand(MCInst &Inst, unsigned Val,
3913 uint64_t Address, const void *Decoder){
3914 if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<9>(Val<<1) + 4,
3915 true, 2, Inst, Decoder))
3916 Inst.addOperand(MCOperand::CreateImm(SignExtend32<9>(Val << 1)));
3917 return MCDisassembler::Success;
3920 static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
3921 uint64_t Address, const void *Decoder){
3922 // Val is passed in as S:J1:J2:imm10:imm11
3923 // Note no trailing zero after imm11. Also the J1 and J2 values are from
3924 // the encoded instruction. So here change to I1 and I2 values via:
3925 // I1 = NOT(J1 EOR S);
3926 // I2 = NOT(J2 EOR S);
3927 // and build the imm32 with one trailing zero as documented:
3928 // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
3929 unsigned S = (Val >> 23) & 1;
3930 unsigned J1 = (Val >> 22) & 1;
3931 unsigned J2 = (Val >> 21) & 1;
3932 unsigned I1 = !(J1 ^ S);
3933 unsigned I2 = !(J2 ^ S);
3934 unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
3935 int imm32 = SignExtend32<25>(tmp << 1);
3937 if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
3938 true, 4, Inst, Decoder))
3939 Inst.addOperand(MCOperand::CreateImm(imm32));
3940 return MCDisassembler::Success;
3943 static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Val,
3944 uint64_t Address, const void *Decoder) {
3946 return MCDisassembler::Fail;
3948 Inst.addOperand(MCOperand::CreateImm(Val));
3949 return MCDisassembler::Success;
3952 static DecodeStatus DecodeInstSyncBarrierOption(MCInst &Inst, unsigned Val,
3953 uint64_t Address, const void *Decoder) {
3955 return MCDisassembler::Fail;
3957 Inst.addOperand(MCOperand::CreateImm(Val));
3958 return MCDisassembler::Success;
3961 static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Val,
3962 uint64_t Address, const void *Decoder) {
3963 if (!Val) return MCDisassembler::Fail;
3964 Inst.addOperand(MCOperand::CreateImm(Val));
3965 return MCDisassembler::Success;
3968 static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
3969 uint64_t Address, const void *Decoder) {
3970 DecodeStatus S = MCDisassembler::Success;
3972 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
3973 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3974 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3977 S = MCDisassembler::SoftFail;
3979 if (!Check(S, DecodeGPRPairRegisterClass(Inst, Rt, Address, Decoder)))
3980 return MCDisassembler::Fail;
3981 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3982 return MCDisassembler::Fail;
3983 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3984 return MCDisassembler::Fail;
3989 static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
3990 uint64_t Address, const void *Decoder){
3991 DecodeStatus S = MCDisassembler::Success;
3993 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
3994 unsigned Rt = fieldFromInstruction(Insn, 0, 4);
3995 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
3996 unsigned pred = fieldFromInstruction(Insn, 28, 4);
3998 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
3999 return MCDisassembler::Fail;
4001 if (Rn == 0xF || Rd == Rn || Rd == Rt || Rd == Rt+1)
4002 S = MCDisassembler::SoftFail;
4004 if (!Check(S, DecodeGPRPairRegisterClass(Inst, Rt, Address, Decoder)))
4005 return MCDisassembler::Fail;
4006 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4007 return MCDisassembler::Fail;
4008 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4009 return MCDisassembler::Fail;
4014 static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
4015 uint64_t Address, const void *Decoder) {
4016 DecodeStatus S = MCDisassembler::Success;
4018 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4019 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4020 unsigned imm = fieldFromInstruction(Insn, 0, 12);
4021 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
4022 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
4023 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4025 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
4027 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
4028 return MCDisassembler::Fail;
4029 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4030 return MCDisassembler::Fail;
4031 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
4032 return MCDisassembler::Fail;
4033 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4034 return MCDisassembler::Fail;
4039 static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
4040 uint64_t Address, const void *Decoder) {
4041 DecodeStatus S = MCDisassembler::Success;
4043 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4044 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4045 unsigned imm = fieldFromInstruction(Insn, 0, 12);
4046 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
4047 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
4048 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4049 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4051 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
4052 if (Rm == 0xF) S = MCDisassembler::SoftFail;
4054 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
4055 return MCDisassembler::Fail;
4056 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4057 return MCDisassembler::Fail;
4058 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
4059 return MCDisassembler::Fail;
4060 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4061 return MCDisassembler::Fail;
4067 static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
4068 uint64_t Address, const void *Decoder) {
4069 DecodeStatus S = MCDisassembler::Success;
4071 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4072 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4073 unsigned imm = fieldFromInstruction(Insn, 0, 12);
4074 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
4075 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
4076 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4078 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
4080 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4081 return MCDisassembler::Fail;
4082 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
4083 return MCDisassembler::Fail;
4084 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
4085 return MCDisassembler::Fail;
4086 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4087 return MCDisassembler::Fail;
4092 static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
4093 uint64_t Address, const void *Decoder) {
4094 DecodeStatus S = MCDisassembler::Success;
4096 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4097 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4098 unsigned imm = fieldFromInstruction(Insn, 0, 12);
4099 imm |= fieldFromInstruction(Insn, 16, 4) << 13;
4100 imm |= fieldFromInstruction(Insn, 23, 1) << 12;
4101 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4103 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
4105 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4106 return MCDisassembler::Fail;
4107 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
4108 return MCDisassembler::Fail;
4109 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
4110 return MCDisassembler::Fail;
4111 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4112 return MCDisassembler::Fail;
4117 static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
4118 uint64_t Address, const void *Decoder) {
4119 DecodeStatus S = MCDisassembler::Success;
4121 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4122 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4123 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4124 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4125 unsigned size = fieldFromInstruction(Insn, 10, 2);
4131 return MCDisassembler::Fail;
4133 if (fieldFromInstruction(Insn, 4, 1))
4134 return MCDisassembler::Fail; // UNDEFINED
4135 index = fieldFromInstruction(Insn, 5, 3);
4138 if (fieldFromInstruction(Insn, 5, 1))
4139 return MCDisassembler::Fail; // UNDEFINED
4140 index = fieldFromInstruction(Insn, 6, 2);
4141 if (fieldFromInstruction(Insn, 4, 1))
4145 if (fieldFromInstruction(Insn, 6, 1))
4146 return MCDisassembler::Fail; // UNDEFINED
4147 index = fieldFromInstruction(Insn, 7, 1);
4149 switch (fieldFromInstruction(Insn, 4, 2)) {
4155 return MCDisassembler::Fail;
4160 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4161 return MCDisassembler::Fail;
4162 if (Rm != 0xF) { // Writeback
4163 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4164 return MCDisassembler::Fail;
4166 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4167 return MCDisassembler::Fail;
4168 Inst.addOperand(MCOperand::CreateImm(align));
4171 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4172 return MCDisassembler::Fail;
4174 Inst.addOperand(MCOperand::CreateReg(0));
4177 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4178 return MCDisassembler::Fail;
4179 Inst.addOperand(MCOperand::CreateImm(index));
4184 static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
4185 uint64_t Address, const void *Decoder) {
4186 DecodeStatus S = MCDisassembler::Success;
4188 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4189 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4190 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4191 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4192 unsigned size = fieldFromInstruction(Insn, 10, 2);
4198 return MCDisassembler::Fail;
4200 if (fieldFromInstruction(Insn, 4, 1))
4201 return MCDisassembler::Fail; // UNDEFINED
4202 index = fieldFromInstruction(Insn, 5, 3);
4205 if (fieldFromInstruction(Insn, 5, 1))
4206 return MCDisassembler::Fail; // UNDEFINED
4207 index = fieldFromInstruction(Insn, 6, 2);
4208 if (fieldFromInstruction(Insn, 4, 1))
4212 if (fieldFromInstruction(Insn, 6, 1))
4213 return MCDisassembler::Fail; // UNDEFINED
4214 index = fieldFromInstruction(Insn, 7, 1);
4216 switch (fieldFromInstruction(Insn, 4, 2)) {
4222 return MCDisassembler::Fail;
4227 if (Rm != 0xF) { // Writeback
4228 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4229 return MCDisassembler::Fail;
4231 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4232 return MCDisassembler::Fail;
4233 Inst.addOperand(MCOperand::CreateImm(align));
4236 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4237 return MCDisassembler::Fail;
4239 Inst.addOperand(MCOperand::CreateReg(0));
4242 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4243 return MCDisassembler::Fail;
4244 Inst.addOperand(MCOperand::CreateImm(index));
4250 static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
4251 uint64_t Address, const void *Decoder) {
4252 DecodeStatus S = MCDisassembler::Success;
4254 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4255 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4256 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4257 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4258 unsigned size = fieldFromInstruction(Insn, 10, 2);
4265 return MCDisassembler::Fail;
4267 index = fieldFromInstruction(Insn, 5, 3);
4268 if (fieldFromInstruction(Insn, 4, 1))
4272 index = fieldFromInstruction(Insn, 6, 2);
4273 if (fieldFromInstruction(Insn, 4, 1))
4275 if (fieldFromInstruction(Insn, 5, 1))
4279 if (fieldFromInstruction(Insn, 5, 1))
4280 return MCDisassembler::Fail; // UNDEFINED
4281 index = fieldFromInstruction(Insn, 7, 1);
4282 if (fieldFromInstruction(Insn, 4, 1) != 0)
4284 if (fieldFromInstruction(Insn, 6, 1))
4289 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4290 return MCDisassembler::Fail;
4291 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4292 return MCDisassembler::Fail;
4293 if (Rm != 0xF) { // Writeback
4294 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4295 return MCDisassembler::Fail;
4297 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4298 return MCDisassembler::Fail;
4299 Inst.addOperand(MCOperand::CreateImm(align));
4302 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4303 return MCDisassembler::Fail;
4305 Inst.addOperand(MCOperand::CreateReg(0));
4308 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4309 return MCDisassembler::Fail;
4310 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4311 return MCDisassembler::Fail;
4312 Inst.addOperand(MCOperand::CreateImm(index));
4317 static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
4318 uint64_t Address, const void *Decoder) {
4319 DecodeStatus S = MCDisassembler::Success;
4321 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4322 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4323 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4324 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4325 unsigned size = fieldFromInstruction(Insn, 10, 2);
4332 return MCDisassembler::Fail;
4334 index = fieldFromInstruction(Insn, 5, 3);
4335 if (fieldFromInstruction(Insn, 4, 1))
4339 index = fieldFromInstruction(Insn, 6, 2);
4340 if (fieldFromInstruction(Insn, 4, 1))
4342 if (fieldFromInstruction(Insn, 5, 1))
4346 if (fieldFromInstruction(Insn, 5, 1))
4347 return MCDisassembler::Fail; // UNDEFINED
4348 index = fieldFromInstruction(Insn, 7, 1);
4349 if (fieldFromInstruction(Insn, 4, 1) != 0)
4351 if (fieldFromInstruction(Insn, 6, 1))
4356 if (Rm != 0xF) { // Writeback
4357 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4358 return MCDisassembler::Fail;
4360 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4361 return MCDisassembler::Fail;
4362 Inst.addOperand(MCOperand::CreateImm(align));
4365 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4366 return MCDisassembler::Fail;
4368 Inst.addOperand(MCOperand::CreateReg(0));
4371 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4372 return MCDisassembler::Fail;
4373 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4374 return MCDisassembler::Fail;
4375 Inst.addOperand(MCOperand::CreateImm(index));
4381 static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
4382 uint64_t Address, const void *Decoder) {
4383 DecodeStatus S = MCDisassembler::Success;
4385 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4386 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4387 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4388 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4389 unsigned size = fieldFromInstruction(Insn, 10, 2);
4396 return MCDisassembler::Fail;
4398 if (fieldFromInstruction(Insn, 4, 1))
4399 return MCDisassembler::Fail; // UNDEFINED
4400 index = fieldFromInstruction(Insn, 5, 3);
4403 if (fieldFromInstruction(Insn, 4, 1))
4404 return MCDisassembler::Fail; // UNDEFINED
4405 index = fieldFromInstruction(Insn, 6, 2);
4406 if (fieldFromInstruction(Insn, 5, 1))
4410 if (fieldFromInstruction(Insn, 4, 2))
4411 return MCDisassembler::Fail; // UNDEFINED
4412 index = fieldFromInstruction(Insn, 7, 1);
4413 if (fieldFromInstruction(Insn, 6, 1))
4418 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4419 return MCDisassembler::Fail;
4420 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4421 return MCDisassembler::Fail;
4422 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4423 return MCDisassembler::Fail;
4425 if (Rm != 0xF) { // Writeback
4426 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4427 return MCDisassembler::Fail;
4429 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4430 return MCDisassembler::Fail;
4431 Inst.addOperand(MCOperand::CreateImm(align));
4434 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4435 return MCDisassembler::Fail;
4437 Inst.addOperand(MCOperand::CreateReg(0));
4440 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4441 return MCDisassembler::Fail;
4442 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4443 return MCDisassembler::Fail;
4444 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4445 return MCDisassembler::Fail;
4446 Inst.addOperand(MCOperand::CreateImm(index));
4451 static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
4452 uint64_t Address, const void *Decoder) {
4453 DecodeStatus S = MCDisassembler::Success;
4455 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4456 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4457 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4458 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4459 unsigned size = fieldFromInstruction(Insn, 10, 2);
4466 return MCDisassembler::Fail;
4468 if (fieldFromInstruction(Insn, 4, 1))
4469 return MCDisassembler::Fail; // UNDEFINED
4470 index = fieldFromInstruction(Insn, 5, 3);
4473 if (fieldFromInstruction(Insn, 4, 1))
4474 return MCDisassembler::Fail; // UNDEFINED
4475 index = fieldFromInstruction(Insn, 6, 2);
4476 if (fieldFromInstruction(Insn, 5, 1))
4480 if (fieldFromInstruction(Insn, 4, 2))
4481 return MCDisassembler::Fail; // UNDEFINED
4482 index = fieldFromInstruction(Insn, 7, 1);
4483 if (fieldFromInstruction(Insn, 6, 1))
4488 if (Rm != 0xF) { // Writeback
4489 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4490 return MCDisassembler::Fail;
4492 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4493 return MCDisassembler::Fail;
4494 Inst.addOperand(MCOperand::CreateImm(align));
4497 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4498 return MCDisassembler::Fail;
4500 Inst.addOperand(MCOperand::CreateReg(0));
4503 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4504 return MCDisassembler::Fail;
4505 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4506 return MCDisassembler::Fail;
4507 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4508 return MCDisassembler::Fail;
4509 Inst.addOperand(MCOperand::CreateImm(index));
4515 static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
4516 uint64_t Address, const void *Decoder) {
4517 DecodeStatus S = MCDisassembler::Success;
4519 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4520 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4521 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4522 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4523 unsigned size = fieldFromInstruction(Insn, 10, 2);
4530 return MCDisassembler::Fail;
4532 if (fieldFromInstruction(Insn, 4, 1))
4534 index = fieldFromInstruction(Insn, 5, 3);
4537 if (fieldFromInstruction(Insn, 4, 1))
4539 index = fieldFromInstruction(Insn, 6, 2);
4540 if (fieldFromInstruction(Insn, 5, 1))
4544 switch (fieldFromInstruction(Insn, 4, 2)) {
4548 return MCDisassembler::Fail;
4550 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4553 index = fieldFromInstruction(Insn, 7, 1);
4554 if (fieldFromInstruction(Insn, 6, 1))
4559 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4560 return MCDisassembler::Fail;
4561 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4562 return MCDisassembler::Fail;
4563 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4564 return MCDisassembler::Fail;
4565 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4566 return MCDisassembler::Fail;
4568 if (Rm != 0xF) { // Writeback
4569 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4570 return MCDisassembler::Fail;
4572 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4573 return MCDisassembler::Fail;
4574 Inst.addOperand(MCOperand::CreateImm(align));
4577 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4578 return MCDisassembler::Fail;
4580 Inst.addOperand(MCOperand::CreateReg(0));
4583 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4584 return MCDisassembler::Fail;
4585 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4586 return MCDisassembler::Fail;
4587 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4588 return MCDisassembler::Fail;
4589 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4590 return MCDisassembler::Fail;
4591 Inst.addOperand(MCOperand::CreateImm(index));
4596 static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
4597 uint64_t Address, const void *Decoder) {
4598 DecodeStatus S = MCDisassembler::Success;
4600 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4601 unsigned Rm = fieldFromInstruction(Insn, 0, 4);
4602 unsigned Rd = fieldFromInstruction(Insn, 12, 4);
4603 Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
4604 unsigned size = fieldFromInstruction(Insn, 10, 2);
4611 return MCDisassembler::Fail;
4613 if (fieldFromInstruction(Insn, 4, 1))
4615 index = fieldFromInstruction(Insn, 5, 3);
4618 if (fieldFromInstruction(Insn, 4, 1))
4620 index = fieldFromInstruction(Insn, 6, 2);
4621 if (fieldFromInstruction(Insn, 5, 1))
4625 switch (fieldFromInstruction(Insn, 4, 2)) {
4629 return MCDisassembler::Fail;
4631 align = 4 << fieldFromInstruction(Insn, 4, 2); break;
4634 index = fieldFromInstruction(Insn, 7, 1);
4635 if (fieldFromInstruction(Insn, 6, 1))
4640 if (Rm != 0xF) { // Writeback
4641 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4642 return MCDisassembler::Fail;
4644 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
4645 return MCDisassembler::Fail;
4646 Inst.addOperand(MCOperand::CreateImm(align));
4649 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
4650 return MCDisassembler::Fail;
4652 Inst.addOperand(MCOperand::CreateReg(0));
4655 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
4656 return MCDisassembler::Fail;
4657 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
4658 return MCDisassembler::Fail;
4659 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
4660 return MCDisassembler::Fail;
4661 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
4662 return MCDisassembler::Fail;
4663 Inst.addOperand(MCOperand::CreateImm(index));
4668 static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
4669 uint64_t Address, const void *Decoder) {
4670 DecodeStatus S = MCDisassembler::Success;
4671 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4672 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4673 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4674 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4675 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4677 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4678 S = MCDisassembler::SoftFail;
4680 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4681 return MCDisassembler::Fail;
4682 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4683 return MCDisassembler::Fail;
4684 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4685 return MCDisassembler::Fail;
4686 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4687 return MCDisassembler::Fail;
4688 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4689 return MCDisassembler::Fail;
4694 static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
4695 uint64_t Address, const void *Decoder) {
4696 DecodeStatus S = MCDisassembler::Success;
4697 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4698 unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
4699 unsigned Rm = fieldFromInstruction(Insn, 5, 1);
4700 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4701 Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
4703 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
4704 S = MCDisassembler::SoftFail;
4706 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
4707 return MCDisassembler::Fail;
4708 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
4709 return MCDisassembler::Fail;
4710 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
4711 return MCDisassembler::Fail;
4712 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
4713 return MCDisassembler::Fail;
4714 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4715 return MCDisassembler::Fail;
4720 static DecodeStatus DecodeIT(MCInst &Inst, unsigned Insn,
4721 uint64_t Address, const void *Decoder) {
4722 DecodeStatus S = MCDisassembler::Success;
4723 unsigned pred = fieldFromInstruction(Insn, 4, 4);
4724 unsigned mask = fieldFromInstruction(Insn, 0, 4);
4728 S = MCDisassembler::SoftFail;
4732 return MCDisassembler::Fail;
4734 Inst.addOperand(MCOperand::CreateImm(pred));
4735 Inst.addOperand(MCOperand::CreateImm(mask));
4740 DecodeT2LDRDPreInstruction(MCInst &Inst, unsigned Insn,
4741 uint64_t Address, const void *Decoder) {
4742 DecodeStatus S = MCDisassembler::Success;
4744 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4745 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
4746 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4747 unsigned addr = fieldFromInstruction(Insn, 0, 8);
4748 unsigned W = fieldFromInstruction(Insn, 21, 1);
4749 unsigned U = fieldFromInstruction(Insn, 23, 1);
4750 unsigned P = fieldFromInstruction(Insn, 24, 1);
4751 bool writeback = (W == 1) | (P == 0);
4753 addr |= (U << 8) | (Rn << 9);
4755 if (writeback && (Rn == Rt || Rn == Rt2))
4756 Check(S, MCDisassembler::SoftFail);
4758 Check(S, MCDisassembler::SoftFail);
4761 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4762 return MCDisassembler::Fail;
4764 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4765 return MCDisassembler::Fail;
4766 // Writeback operand
4767 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4768 return MCDisassembler::Fail;
4770 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4771 return MCDisassembler::Fail;
4777 DecodeT2STRDPreInstruction(MCInst &Inst, unsigned Insn,
4778 uint64_t Address, const void *Decoder) {
4779 DecodeStatus S = MCDisassembler::Success;
4781 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4782 unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
4783 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4784 unsigned addr = fieldFromInstruction(Insn, 0, 8);
4785 unsigned W = fieldFromInstruction(Insn, 21, 1);
4786 unsigned U = fieldFromInstruction(Insn, 23, 1);
4787 unsigned P = fieldFromInstruction(Insn, 24, 1);
4788 bool writeback = (W == 1) | (P == 0);
4790 addr |= (U << 8) | (Rn << 9);
4792 if (writeback && (Rn == Rt || Rn == Rt2))
4793 Check(S, MCDisassembler::SoftFail);
4795 // Writeback operand
4796 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
4797 return MCDisassembler::Fail;
4799 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
4800 return MCDisassembler::Fail;
4802 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
4803 return MCDisassembler::Fail;
4805 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
4806 return MCDisassembler::Fail;
4811 static DecodeStatus DecodeT2Adr(MCInst &Inst, uint32_t Insn,
4812 uint64_t Address, const void *Decoder) {
4813 unsigned sign1 = fieldFromInstruction(Insn, 21, 1);
4814 unsigned sign2 = fieldFromInstruction(Insn, 23, 1);
4815 if (sign1 != sign2) return MCDisassembler::Fail;
4817 unsigned Val = fieldFromInstruction(Insn, 0, 8);
4818 Val |= fieldFromInstruction(Insn, 12, 3) << 8;
4819 Val |= fieldFromInstruction(Insn, 26, 1) << 11;
4821 Inst.addOperand(MCOperand::CreateImm(SignExtend32<13>(Val)));
4823 return MCDisassembler::Success;
4826 static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, uint32_t Val,
4828 const void *Decoder) {
4829 DecodeStatus S = MCDisassembler::Success;
4831 // Shift of "asr #32" is not allowed in Thumb2 mode.
4832 if (Val == 0x20) S = MCDisassembler::SoftFail;
4833 Inst.addOperand(MCOperand::CreateImm(Val));
4837 static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
4838 uint64_t Address, const void *Decoder) {
4839 unsigned Rt = fieldFromInstruction(Insn, 12, 4);
4840 unsigned Rt2 = fieldFromInstruction(Insn, 0, 4);
4841 unsigned Rn = fieldFromInstruction(Insn, 16, 4);
4842 unsigned pred = fieldFromInstruction(Insn, 28, 4);
4845 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
4847 DecodeStatus S = MCDisassembler::Success;
4849 if (Rt == Rn || Rn == Rt2)
4850 S = MCDisassembler::SoftFail;
4852 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4853 return MCDisassembler::Fail;
4854 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
4855 return MCDisassembler::Fail;
4856 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4857 return MCDisassembler::Fail;
4858 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
4859 return MCDisassembler::Fail;
4864 static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
4865 uint64_t Address, const void *Decoder) {
4866 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
4867 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
4868 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
4869 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
4870 unsigned imm = fieldFromInstruction(Insn, 16, 6);
4871 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
4872 unsigned op = fieldFromInstruction(Insn, 5, 1);
4874 DecodeStatus S = MCDisassembler::Success;
4876 // VMOVv2f32 is ambiguous with these decodings.
4877 if (!(imm & 0x38) && cmode == 0xF) {
4878 if (op == 1) return MCDisassembler::Fail;
4879 Inst.setOpcode(ARM::VMOVv2f32);
4880 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4883 if (!(imm & 0x20)) return MCDisassembler::Fail;
4885 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
4886 return MCDisassembler::Fail;
4887 if (!Check(S, DecodeDPRRegisterClass(Inst, Vm, Address, Decoder)))
4888 return MCDisassembler::Fail;
4889 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4894 static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
4895 uint64_t Address, const void *Decoder) {
4896 unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
4897 Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
4898 unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
4899 Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
4900 unsigned imm = fieldFromInstruction(Insn, 16, 6);
4901 unsigned cmode = fieldFromInstruction(Insn, 8, 4);
4902 unsigned op = fieldFromInstruction(Insn, 5, 1);
4904 DecodeStatus S = MCDisassembler::Success;
4906 // VMOVv4f32 is ambiguous with these decodings.
4907 if (!(imm & 0x38) && cmode == 0xF) {
4908 if (op == 1) return MCDisassembler::Fail;
4909 Inst.setOpcode(ARM::VMOVv4f32);
4910 return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
4913 if (!(imm & 0x20)) return MCDisassembler::Fail;
4915 if (!Check(S, DecodeQPRRegisterClass(Inst, Vd, Address, Decoder)))
4916 return MCDisassembler::Fail;
4917 if (!Check(S, DecodeQPRRegisterClass(Inst, Vm, Address, Decoder)))
4918 return MCDisassembler::Fail;
4919 Inst.addOperand(MCOperand::CreateImm(64 - imm));
4924 static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
4925 uint64_t Address, const void *Decoder) {
4926 DecodeStatus S = MCDisassembler::Success;
4928 unsigned Rn = fieldFromInstruction(Val, 16, 4);
4929 unsigned Rt = fieldFromInstruction(Val, 12, 4);
4930 unsigned Rm = fieldFromInstruction(Val, 0, 4);
4931 Rm |= (fieldFromInstruction(Val, 23, 1) << 4);
4932 unsigned Cond = fieldFromInstruction(Val, 28, 4);
4934 if (fieldFromInstruction(Val, 8, 4) != 0 || Rn == Rt)
4935 S = MCDisassembler::SoftFail;
4937 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4938 return MCDisassembler::Fail;
4939 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
4940 return MCDisassembler::Fail;
4941 if (!Check(S, DecodeAddrMode7Operand(Inst, Rn, Address, Decoder)))
4942 return MCDisassembler::Fail;
4943 if (!Check(S, DecodePostIdxReg(Inst, Rm, Address, Decoder)))
4944 return MCDisassembler::Fail;
4945 if (!Check(S, DecodePredicateOperand(Inst, Cond, Address, Decoder)))
4946 return MCDisassembler::Fail;
4951 static DecodeStatus DecodeMRRC2(llvm::MCInst &Inst, unsigned Val,
4952 uint64_t Address, const void *Decoder) {
4954 DecodeStatus S = MCDisassembler::Success;
4956 unsigned CRm = fieldFromInstruction(Val, 0, 4);
4957 unsigned opc1 = fieldFromInstruction(Val, 4, 4);
4958 unsigned cop = fieldFromInstruction(Val, 8, 4);
4959 unsigned Rt = fieldFromInstruction(Val, 12, 4);
4960 unsigned Rt2 = fieldFromInstruction(Val, 16, 4);
4962 if ((cop & ~0x1) == 0xa)
4963 return MCDisassembler::Fail;
4966 S = MCDisassembler::SoftFail;
4968 Inst.addOperand(MCOperand::CreateImm(cop));
4969 Inst.addOperand(MCOperand::CreateImm(opc1));
4970 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
4971 return MCDisassembler::Fail;
4972 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
4973 return MCDisassembler::Fail;
4974 Inst.addOperand(MCOperand::CreateImm(CRm));