1 //===- ARMDisassembler.cpp - Disassembler for ARM/Thumb ISA -----*- C++ -*-===//
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"
13 #include "ARMRegisterInfo.h"
14 #include "ARMSubtarget.h"
15 #include "MCTargetDesc/ARMAddressingModes.h"
16 #include "MCTargetDesc/ARMBaseInfo.h"
17 #include "llvm/MC/EDInstInfo.h"
18 #include "llvm/MC/MCInst.h"
19 #include "llvm/MC/MCExpr.h"
20 #include "llvm/MC/MCContext.h"
21 #include "llvm/MC/MCDisassembler.h"
22 #include "llvm/Support/Debug.h"
23 #include "llvm/Support/MemoryObject.h"
24 #include "llvm/Support/ErrorHandling.h"
25 #include "llvm/Support/TargetRegistry.h"
26 #include "llvm/Support/raw_ostream.h"
30 typedef MCDisassembler::DecodeStatus DecodeStatus;
33 /// ARMDisassembler - ARM disassembler for all ARM platforms.
34 class ARMDisassembler : public MCDisassembler {
36 /// Constructor - Initializes the disassembler.
38 ARMDisassembler(const MCSubtargetInfo &STI) :
45 /// getInstruction - See MCDisassembler.
46 DecodeStatus getInstruction(MCInst &instr,
48 const MemoryObject ®ion,
50 raw_ostream &vStream) const;
52 /// getEDInfo - See MCDisassembler.
53 EDInstInfo *getEDInfo() const;
57 /// ThumbDisassembler - Thumb disassembler for all Thumb platforms.
58 class ThumbDisassembler : public MCDisassembler {
60 /// Constructor - Initializes the disassembler.
62 ThumbDisassembler(const MCSubtargetInfo &STI) :
66 ~ThumbDisassembler() {
69 /// getInstruction - See MCDisassembler.
70 DecodeStatus getInstruction(MCInst &instr,
72 const MemoryObject ®ion,
74 raw_ostream &vStream) const;
76 /// getEDInfo - See MCDisassembler.
77 EDInstInfo *getEDInfo() const;
79 mutable std::vector<unsigned> ITBlock;
80 void AddThumbPredicate(MCInst&) const;
81 void UpdateThumbVFPPredicate(MCInst&) const;
85 static bool Check(DecodeStatus &Out, DecodeStatus In) {
87 case MCDisassembler::Success:
88 // Out stays the same.
90 case MCDisassembler::SoftFail:
93 case MCDisassembler::Fail:
101 // Forward declare these because the autogenerated code will reference them.
102 // Definitions are further down.
103 static DecodeStatus DecodeGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
104 uint64_t Address, const void *Decoder);
105 static DecodeStatus DecodeGPRnopcRegisterClass(llvm::MCInst &Inst,
106 unsigned RegNo, uint64_t Address,
107 const void *Decoder);
108 static DecodeStatus DecodetGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
109 uint64_t Address, const void *Decoder);
110 static DecodeStatus DecodetcGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
111 uint64_t Address, const void *Decoder);
112 static DecodeStatus DecoderGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
113 uint64_t Address, const void *Decoder);
114 static DecodeStatus DecodeSPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
115 uint64_t Address, const void *Decoder);
116 static DecodeStatus DecodeDPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
117 uint64_t Address, const void *Decoder);
118 static DecodeStatus DecodeDPR_8RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
119 uint64_t Address, const void *Decoder);
120 static DecodeStatus DecodeDPR_VFP2RegisterClass(llvm::MCInst &Inst,
123 const void *Decoder);
124 static DecodeStatus DecodeQPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
125 uint64_t Address, const void *Decoder);
127 static DecodeStatus DecodePredicateOperand(llvm::MCInst &Inst, unsigned Val,
128 uint64_t Address, const void *Decoder);
129 static DecodeStatus DecodeCCOutOperand(llvm::MCInst &Inst, unsigned Val,
130 uint64_t Address, const void *Decoder);
131 static DecodeStatus DecodeSOImmOperand(llvm::MCInst &Inst, unsigned Val,
132 uint64_t Address, const void *Decoder);
133 static DecodeStatus DecodeRegListOperand(llvm::MCInst &Inst, unsigned Val,
134 uint64_t Address, const void *Decoder);
135 static DecodeStatus DecodeSPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
136 uint64_t Address, const void *Decoder);
137 static DecodeStatus DecodeDPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
138 uint64_t Address, const void *Decoder);
140 static DecodeStatus DecodeBitfieldMaskOperand(llvm::MCInst &Inst, unsigned Insn,
141 uint64_t Address, const void *Decoder);
142 static DecodeStatus DecodeCopMemInstruction(llvm::MCInst &Inst, unsigned Insn,
143 uint64_t Address, const void *Decoder);
144 static DecodeStatus DecodeAddrMode2IdxInstruction(llvm::MCInst &Inst,
147 const void *Decoder);
148 static DecodeStatus DecodeSORegMemOperand(llvm::MCInst &Inst, unsigned Insn,
149 uint64_t Address, const void *Decoder);
150 static DecodeStatus DecodeAddrMode3Instruction(llvm::MCInst &Inst,unsigned Insn,
151 uint64_t Address, const void *Decoder);
152 static DecodeStatus DecodeSORegImmOperand(llvm::MCInst &Inst, unsigned Insn,
153 uint64_t Address, const void *Decoder);
154 static DecodeStatus DecodeSORegRegOperand(llvm::MCInst &Inst, unsigned Insn,
155 uint64_t Address, const void *Decoder);
157 static DecodeStatus DecodeMemMultipleWritebackInstruction(llvm::MCInst & Inst,
160 const void *Decoder);
161 static DecodeStatus DecodeSMLAInstruction(llvm::MCInst &Inst, unsigned Insn,
162 uint64_t Address, const void *Decoder);
163 static DecodeStatus DecodeCPSInstruction(llvm::MCInst &Inst, unsigned Insn,
164 uint64_t Address, const void *Decoder);
165 static DecodeStatus DecodeT2CPSInstruction(llvm::MCInst &Inst, unsigned Insn,
166 uint64_t Address, const void *Decoder);
167 static DecodeStatus DecodeAddrModeImm12Operand(llvm::MCInst &Inst, unsigned Val,
168 uint64_t Address, const void *Decoder);
169 static DecodeStatus DecodeAddrMode5Operand(llvm::MCInst &Inst, unsigned Val,
170 uint64_t Address, const void *Decoder);
171 static DecodeStatus DecodeAddrMode7Operand(llvm::MCInst &Inst, unsigned Val,
172 uint64_t Address, const void *Decoder);
173 static DecodeStatus DecodeBranchImmInstruction(llvm::MCInst &Inst,unsigned Insn,
174 uint64_t Address, const void *Decoder);
175 static DecodeStatus DecodeVCVTImmOperand(llvm::MCInst &Inst, unsigned Val,
176 uint64_t Address, const void *Decoder);
177 static DecodeStatus DecodeAddrMode6Operand(llvm::MCInst &Inst, unsigned Val,
178 uint64_t Address, const void *Decoder);
179 static DecodeStatus DecodeVLDInstruction(llvm::MCInst &Inst, unsigned Val,
180 uint64_t Address, const void *Decoder);
181 static DecodeStatus DecodeVSTInstruction(llvm::MCInst &Inst, unsigned Val,
182 uint64_t Address, const void *Decoder);
183 static DecodeStatus DecodeVLD1DupInstruction(llvm::MCInst &Inst, unsigned Val,
184 uint64_t Address, const void *Decoder);
185 static DecodeStatus DecodeVLD2DupInstruction(llvm::MCInst &Inst, unsigned Val,
186 uint64_t Address, const void *Decoder);
187 static DecodeStatus DecodeVLD3DupInstruction(llvm::MCInst &Inst, unsigned Val,
188 uint64_t Address, const void *Decoder);
189 static DecodeStatus DecodeVLD4DupInstruction(llvm::MCInst &Inst, unsigned Val,
190 uint64_t Address, const void *Decoder);
191 static DecodeStatus DecodeNEONModImmInstruction(llvm::MCInst &Inst,unsigned Val,
192 uint64_t Address, const void *Decoder);
193 static DecodeStatus DecodeVSHLMaxInstruction(llvm::MCInst &Inst, unsigned Val,
194 uint64_t Address, const void *Decoder);
195 static DecodeStatus DecodeShiftRight8Imm(llvm::MCInst &Inst, unsigned Val,
196 uint64_t Address, const void *Decoder);
197 static DecodeStatus DecodeShiftRight16Imm(llvm::MCInst &Inst, unsigned Val,
198 uint64_t Address, const void *Decoder);
199 static DecodeStatus DecodeShiftRight32Imm(llvm::MCInst &Inst, unsigned Val,
200 uint64_t Address, const void *Decoder);
201 static DecodeStatus DecodeShiftRight64Imm(llvm::MCInst &Inst, unsigned Val,
202 uint64_t Address, const void *Decoder);
203 static DecodeStatus DecodeTBLInstruction(llvm::MCInst &Inst, unsigned Insn,
204 uint64_t Address, const void *Decoder);
205 static DecodeStatus DecodeVFPfpImm(llvm::MCInst &Inst, unsigned Val,
206 uint64_t Address, const void *Decoder);
207 static DecodeStatus DecodePostIdxReg(llvm::MCInst &Inst, unsigned Insn,
208 uint64_t Address, const void *Decoder);
209 static DecodeStatus DecodeCoprocessor(llvm::MCInst &Inst, unsigned Insn,
210 uint64_t Address, const void *Decoder);
211 static DecodeStatus DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Insn,
212 uint64_t Address, const void *Decoder);
213 static DecodeStatus DecodeMSRMask(llvm::MCInst &Inst, unsigned Insn,
214 uint64_t Address, const void *Decoder);
215 static DecodeStatus DecodeDoubleRegLoad(llvm::MCInst &Inst, unsigned Insn,
216 uint64_t Address, const void *Decoder);
217 static DecodeStatus DecodeDoubleRegStore(llvm::MCInst &Inst, unsigned Insn,
218 uint64_t Address, const void *Decoder);
219 static DecodeStatus DecodeLDRPreImm(llvm::MCInst &Inst, unsigned Insn,
220 uint64_t Address, const void *Decoder);
221 static DecodeStatus DecodeLDRPreReg(llvm::MCInst &Inst, unsigned Insn,
222 uint64_t Address, const void *Decoder);
223 static DecodeStatus DecodeSTRPreImm(llvm::MCInst &Inst, unsigned Insn,
224 uint64_t Address, const void *Decoder);
225 static DecodeStatus DecodeSTRPreReg(llvm::MCInst &Inst, unsigned Insn,
226 uint64_t Address, const void *Decoder);
227 static DecodeStatus DecodeVLD1LN(llvm::MCInst &Inst, unsigned Insn,
228 uint64_t Address, const void *Decoder);
229 static DecodeStatus DecodeVLD2LN(llvm::MCInst &Inst, unsigned Insn,
230 uint64_t Address, const void *Decoder);
231 static DecodeStatus DecodeVLD3LN(llvm::MCInst &Inst, unsigned Insn,
232 uint64_t Address, const void *Decoder);
233 static DecodeStatus DecodeVLD4LN(llvm::MCInst &Inst, unsigned Insn,
234 uint64_t Address, const void *Decoder);
235 static DecodeStatus DecodeVST1LN(llvm::MCInst &Inst, unsigned Insn,
236 uint64_t Address, const void *Decoder);
237 static DecodeStatus DecodeVST2LN(llvm::MCInst &Inst, unsigned Insn,
238 uint64_t Address, const void *Decoder);
239 static DecodeStatus DecodeVST3LN(llvm::MCInst &Inst, unsigned Insn,
240 uint64_t Address, const void *Decoder);
241 static DecodeStatus DecodeVST4LN(llvm::MCInst &Inst, unsigned Insn,
242 uint64_t Address, const void *Decoder);
243 static DecodeStatus DecodeVMOVSRR(llvm::MCInst &Inst, unsigned Insn,
244 uint64_t Address, const void *Decoder);
245 static DecodeStatus DecodeVMOVRRS(llvm::MCInst &Inst, unsigned Insn,
246 uint64_t Address, const void *Decoder);
248 static DecodeStatus DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn,
249 uint64_t Address, const void *Decoder);
250 static DecodeStatus DecodeThumbBROperand(llvm::MCInst &Inst, unsigned Val,
251 uint64_t Address, const void *Decoder);
252 static DecodeStatus DecodeT2BROperand(llvm::MCInst &Inst, unsigned Val,
253 uint64_t Address, const void *Decoder);
254 static DecodeStatus DecodeThumbCmpBROperand(llvm::MCInst &Inst, unsigned Val,
255 uint64_t Address, const void *Decoder);
256 static DecodeStatus DecodeThumbAddrModeRR(llvm::MCInst &Inst, unsigned Val,
257 uint64_t Address, const void *Decoder);
258 static DecodeStatus DecodeThumbAddrModeIS(llvm::MCInst &Inst, unsigned Val,
259 uint64_t Address, const void *Decoder);
260 static DecodeStatus DecodeThumbAddrModePC(llvm::MCInst &Inst, unsigned Val,
261 uint64_t Address, const void *Decoder);
262 static DecodeStatus DecodeThumbAddrModeSP(llvm::MCInst &Inst, unsigned Val,
263 uint64_t Address, const void *Decoder);
264 static DecodeStatus DecodeT2AddrModeSOReg(llvm::MCInst &Inst, unsigned Val,
265 uint64_t Address, const void *Decoder);
266 static DecodeStatus DecodeT2LoadShift(llvm::MCInst &Inst, unsigned Val,
267 uint64_t Address, const void *Decoder);
268 static DecodeStatus DecodeT2Imm8S4(llvm::MCInst &Inst, unsigned Val,
269 uint64_t Address, const void *Decoder);
270 static DecodeStatus DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val,
271 uint64_t Address, const void *Decoder);
272 static DecodeStatus DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
273 uint64_t Address, const void *Decoder);
274 static DecodeStatus DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val,
275 uint64_t Address, const void *Decoder);
276 static DecodeStatus DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Val,
277 uint64_t Address, const void *Decoder);
278 static DecodeStatus DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn,
279 uint64_t Address, const void *Decoder);
280 static DecodeStatus DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn,
281 uint64_t Address, const void *Decoder);
282 static DecodeStatus DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Insn,
283 uint64_t Address, const void *Decoder);
284 static DecodeStatus DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val,
285 uint64_t Address, const void *Decoder);
286 static DecodeStatus DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Val,
287 uint64_t Address, const void *Decoder);
288 static DecodeStatus DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val,
289 uint64_t Address, const void *Decoder);
290 static DecodeStatus DecodeThumbBCCTargetOperand(llvm::MCInst &Inst,unsigned Val,
291 uint64_t Address, const void *Decoder);
292 static DecodeStatus DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
293 uint64_t Address, const void *Decoder);
294 static DecodeStatus DecodeIT(llvm::MCInst &Inst, unsigned Val,
295 uint64_t Address, const void *Decoder);
297 #include "ARMGenDisassemblerTables.inc"
298 #include "ARMGenInstrInfo.inc"
299 #include "ARMGenEDInfo.inc"
301 static MCDisassembler *createARMDisassembler(const Target &T, const MCSubtargetInfo &STI) {
302 return new ARMDisassembler(STI);
305 static MCDisassembler *createThumbDisassembler(const Target &T, const MCSubtargetInfo &STI) {
306 return new ThumbDisassembler(STI);
309 EDInstInfo *ARMDisassembler::getEDInfo() const {
313 EDInstInfo *ThumbDisassembler::getEDInfo() const {
317 DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
318 const MemoryObject &Region,
320 raw_ostream &os) const {
323 assert(!(STI.getFeatureBits() & ARM::ModeThumb) &&
324 "Asked to disassemble an ARM instruction but Subtarget is in Thumb mode!");
326 // We want to read exactly 4 bytes of data.
327 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
329 return MCDisassembler::Fail;
332 // Encoded as a small-endian 32-bit word in the stream.
333 uint32_t insn = (bytes[3] << 24) |
338 // Calling the auto-generated decoder function.
339 DecodeStatus result = decodeARMInstruction32(MI, insn, Address, this, STI);
340 if (result != MCDisassembler::Fail) {
345 // VFP and NEON instructions, similarly, are shared between ARM
348 result = decodeVFPInstruction32(MI, insn, Address, this, STI);
349 if (result != MCDisassembler::Fail) {
355 result = decodeNEONDataInstruction32(MI, insn, Address, this, STI);
356 if (result != MCDisassembler::Fail) {
358 // Add a fake predicate operand, because we share these instruction
359 // definitions with Thumb2 where these instructions are predicable.
360 if (!DecodePredicateOperand(MI, 0xE, Address, this))
361 return MCDisassembler::Fail;
366 result = decodeNEONLoadStoreInstruction32(MI, insn, Address, this, STI);
367 if (result != MCDisassembler::Fail) {
369 // Add a fake predicate operand, because we share these instruction
370 // definitions with Thumb2 where these instructions are predicable.
371 if (!DecodePredicateOperand(MI, 0xE, Address, this))
372 return MCDisassembler::Fail;
377 result = decodeNEONDupInstruction32(MI, insn, Address, this, STI);
378 if (result != MCDisassembler::Fail) {
380 // Add a fake predicate operand, because we share these instruction
381 // definitions with Thumb2 where these instructions are predicable.
382 if (!DecodePredicateOperand(MI, 0xE, Address, this))
383 return MCDisassembler::Fail;
390 return MCDisassembler::Fail;
394 extern MCInstrDesc ARMInsts[];
397 // Thumb1 instructions don't have explicit S bits. Rather, they
398 // implicitly set CPSR. Since it's not represented in the encoding, the
399 // auto-generated decoder won't inject the CPSR operand. We need to fix
400 // that as a post-pass.
401 static void AddThumb1SBit(MCInst &MI, bool InITBlock) {
402 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
403 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
404 MCInst::iterator I = MI.begin();
405 for (unsigned i = 0; i < NumOps; ++i, ++I) {
406 if (I == MI.end()) break;
407 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) {
408 if (i > 0 && OpInfo[i-1].isPredicate()) continue;
409 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
414 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
417 // Most Thumb instructions don't have explicit predicates in the
418 // encoding, but rather get their predicates from IT context. We need
419 // to fix up the predicate operands using this context information as a
421 void ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
422 // A few instructions actually have predicates encoded in them. Don't
423 // try to overwrite it if we're seeing one of those.
424 switch (MI.getOpcode()) {
432 // If we're in an IT block, base the predicate on that. Otherwise,
433 // assume a predicate of AL.
435 if (!ITBlock.empty()) {
443 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
444 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
445 MCInst::iterator I = MI.begin();
446 for (unsigned i = 0; i < NumOps; ++i, ++I) {
447 if (I == MI.end()) break;
448 if (OpInfo[i].isPredicate()) {
449 I = MI.insert(I, MCOperand::CreateImm(CC));
452 MI.insert(I, MCOperand::CreateReg(0));
454 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
459 I = MI.insert(I, MCOperand::CreateImm(CC));
462 MI.insert(I, MCOperand::CreateReg(0));
464 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
467 // Thumb VFP instructions are a special case. Because we share their
468 // encodings between ARM and Thumb modes, and they are predicable in ARM
469 // mode, the auto-generated decoder will give them an (incorrect)
470 // predicate operand. We need to rewrite these operands based on the IT
471 // context as a post-pass.
472 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
474 if (!ITBlock.empty()) {
480 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
481 MCInst::iterator I = MI.begin();
482 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
483 for (unsigned i = 0; i < NumOps; ++i, ++I) {
484 if (OpInfo[i].isPredicate() ) {
490 I->setReg(ARM::CPSR);
496 DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
497 const MemoryObject &Region,
499 raw_ostream &os) const {
502 assert((STI.getFeatureBits() & ARM::ModeThumb) &&
503 "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!");
505 // We want to read exactly 2 bytes of data.
506 if (Region.readBytes(Address, 2, (uint8_t*)bytes, NULL) == -1) {
508 return MCDisassembler::Fail;
511 uint16_t insn16 = (bytes[1] << 8) | bytes[0];
512 DecodeStatus result = decodeThumbInstruction16(MI, insn16, Address, this, STI);
513 if (result != MCDisassembler::Fail) {
515 AddThumbPredicate(MI);
520 result = decodeThumbSBitInstruction16(MI, insn16, Address, this, STI);
523 bool InITBlock = !ITBlock.empty();
524 AddThumbPredicate(MI);
525 AddThumb1SBit(MI, InITBlock);
530 result = decodeThumb2Instruction16(MI, insn16, Address, this, STI);
531 if (result != MCDisassembler::Fail) {
533 AddThumbPredicate(MI);
535 // If we find an IT instruction, we need to parse its condition
536 // code and mask operands so that we can apply them correctly
537 // to the subsequent instructions.
538 if (MI.getOpcode() == ARM::t2IT) {
539 // (3 - the number of trailing zeros) is the number of then / else.
540 unsigned firstcond = MI.getOperand(0).getImm();
541 unsigned Mask = MI.getOperand(1).getImm();
542 unsigned CondBit0 = Mask >> 4 & 1;
543 unsigned NumTZ = CountTrailingZeros_32(Mask);
544 assert(NumTZ <= 3 && "Invalid IT mask!");
545 for (unsigned Pos = 3, e = NumTZ; Pos > e; --Pos) {
546 bool T = ((Mask >> Pos) & 1) == CondBit0;
548 ITBlock.insert(ITBlock.begin(), firstcond);
550 ITBlock.insert(ITBlock.begin(), firstcond ^ 1);
553 ITBlock.push_back(firstcond);
559 // We want to read exactly 4 bytes of data.
560 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
562 return MCDisassembler::Fail;
565 uint32_t insn32 = (bytes[3] << 8) |
570 result = decodeThumbInstruction32(MI, insn32, Address, this, STI);
571 if (result != MCDisassembler::Fail) {
573 bool InITBlock = ITBlock.size();
574 AddThumbPredicate(MI);
575 AddThumb1SBit(MI, InITBlock);
580 result = decodeThumb2Instruction32(MI, insn32, Address, this, STI);
581 if (result != MCDisassembler::Fail) {
583 AddThumbPredicate(MI);
588 result = decodeVFPInstruction32(MI, insn32, Address, this, STI);
589 if (result != MCDisassembler::Fail) {
591 UpdateThumbVFPPredicate(MI);
596 result = decodeNEONDupInstruction32(MI, insn32, Address, this, STI);
597 if (result != MCDisassembler::Fail) {
599 AddThumbPredicate(MI);
603 if (fieldFromInstruction32(insn32, 24, 8) == 0xF9) {
605 uint32_t NEONLdStInsn = insn32;
606 NEONLdStInsn &= 0xF0FFFFFF;
607 NEONLdStInsn |= 0x04000000;
608 result = decodeNEONLoadStoreInstruction32(MI, NEONLdStInsn, Address, this, STI);
609 if (result != MCDisassembler::Fail) {
611 AddThumbPredicate(MI);
616 if (fieldFromInstruction32(insn32, 24, 4) == 0xF) {
618 uint32_t NEONDataInsn = insn32;
619 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
620 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
621 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
622 result = decodeNEONDataInstruction32(MI, NEONDataInsn, Address, this, STI);
623 if (result != MCDisassembler::Fail) {
625 AddThumbPredicate(MI);
631 return MCDisassembler::Fail;
635 extern "C" void LLVMInitializeARMDisassembler() {
636 TargetRegistry::RegisterMCDisassembler(TheARMTarget,
637 createARMDisassembler);
638 TargetRegistry::RegisterMCDisassembler(TheThumbTarget,
639 createThumbDisassembler);
642 static const unsigned GPRDecoderTable[] = {
643 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
644 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
645 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
646 ARM::R12, ARM::SP, ARM::LR, ARM::PC
649 static DecodeStatus DecodeGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
650 uint64_t Address, const void *Decoder) {
652 return MCDisassembler::Fail;
654 unsigned Register = GPRDecoderTable[RegNo];
655 Inst.addOperand(MCOperand::CreateReg(Register));
656 return MCDisassembler::Success;
660 DecodeGPRnopcRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
661 uint64_t Address, const void *Decoder) {
662 if (RegNo == 15) return MCDisassembler::Fail;
663 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
666 static DecodeStatus DecodetGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
667 uint64_t Address, const void *Decoder) {
669 return MCDisassembler::Fail;
670 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
673 static DecodeStatus DecodetcGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
674 uint64_t Address, const void *Decoder) {
675 unsigned Register = 0;
696 return MCDisassembler::Fail;
699 Inst.addOperand(MCOperand::CreateReg(Register));
700 return MCDisassembler::Success;
703 static DecodeStatus DecoderGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
704 uint64_t Address, const void *Decoder) {
705 if (RegNo == 13 || RegNo == 15) return MCDisassembler::Fail;
706 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
709 static const unsigned SPRDecoderTable[] = {
710 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
711 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
712 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
713 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
714 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
715 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
716 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
717 ARM::S28, ARM::S29, ARM::S30, ARM::S31
720 static DecodeStatus DecodeSPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
721 uint64_t Address, const void *Decoder) {
723 return MCDisassembler::Fail;
725 unsigned Register = SPRDecoderTable[RegNo];
726 Inst.addOperand(MCOperand::CreateReg(Register));
727 return MCDisassembler::Success;
730 static const unsigned DPRDecoderTable[] = {
731 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
732 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
733 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
734 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
735 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
736 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
737 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
738 ARM::D28, ARM::D29, ARM::D30, ARM::D31
741 static DecodeStatus DecodeDPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
742 uint64_t Address, const void *Decoder) {
744 return MCDisassembler::Fail;
746 unsigned Register = DPRDecoderTable[RegNo];
747 Inst.addOperand(MCOperand::CreateReg(Register));
748 return MCDisassembler::Success;
751 static DecodeStatus DecodeDPR_8RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
752 uint64_t Address, const void *Decoder) {
754 return MCDisassembler::Fail;
755 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
759 DecodeDPR_VFP2RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
760 uint64_t Address, const void *Decoder) {
762 return MCDisassembler::Fail;
763 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
766 static const unsigned QPRDecoderTable[] = {
767 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
768 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
769 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
770 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
774 static DecodeStatus DecodeQPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
775 uint64_t Address, const void *Decoder) {
777 return MCDisassembler::Fail;
780 unsigned Register = QPRDecoderTable[RegNo];
781 Inst.addOperand(MCOperand::CreateReg(Register));
782 return MCDisassembler::Success;
785 static DecodeStatus DecodePredicateOperand(llvm::MCInst &Inst, unsigned Val,
786 uint64_t Address, const void *Decoder) {
787 if (Val == 0xF) return MCDisassembler::Fail;
788 // AL predicate is not allowed on Thumb1 branches.
789 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
790 return MCDisassembler::Fail;
791 Inst.addOperand(MCOperand::CreateImm(Val));
792 if (Val == ARMCC::AL) {
793 Inst.addOperand(MCOperand::CreateReg(0));
795 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
796 return MCDisassembler::Success;
799 static DecodeStatus DecodeCCOutOperand(llvm::MCInst &Inst, unsigned Val,
800 uint64_t Address, const void *Decoder) {
802 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
804 Inst.addOperand(MCOperand::CreateReg(0));
805 return MCDisassembler::Success;
808 static DecodeStatus DecodeSOImmOperand(llvm::MCInst &Inst, unsigned Val,
809 uint64_t Address, const void *Decoder) {
810 uint32_t imm = Val & 0xFF;
811 uint32_t rot = (Val & 0xF00) >> 7;
812 uint32_t rot_imm = (imm >> rot) | (imm << (32-rot));
813 Inst.addOperand(MCOperand::CreateImm(rot_imm));
814 return MCDisassembler::Success;
817 static DecodeStatus DecodeSORegImmOperand(llvm::MCInst &Inst, unsigned Val,
818 uint64_t Address, const void *Decoder) {
819 DecodeStatus S = MCDisassembler::Success;
821 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
822 unsigned type = fieldFromInstruction32(Val, 5, 2);
823 unsigned imm = fieldFromInstruction32(Val, 7, 5);
825 // Register-immediate
826 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
827 return MCDisassembler::Fail;
829 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
845 if (Shift == ARM_AM::ror && imm == 0)
848 unsigned Op = Shift | (imm << 3);
849 Inst.addOperand(MCOperand::CreateImm(Op));
854 static DecodeStatus DecodeSORegRegOperand(llvm::MCInst &Inst, unsigned Val,
855 uint64_t Address, const void *Decoder) {
856 DecodeStatus S = MCDisassembler::Success;
858 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
859 unsigned type = fieldFromInstruction32(Val, 5, 2);
860 unsigned Rs = fieldFromInstruction32(Val, 8, 4);
863 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
864 return MCDisassembler::Fail;
865 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)))
866 return MCDisassembler::Fail;
868 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
884 Inst.addOperand(MCOperand::CreateImm(Shift));
889 static DecodeStatus DecodeRegListOperand(llvm::MCInst &Inst, unsigned Val,
890 uint64_t Address, const void *Decoder) {
891 DecodeStatus S = MCDisassembler::Success;
893 // Empty register lists are not allowed.
894 if (CountPopulation_32(Val) == 0) return MCDisassembler::Fail;
895 for (unsigned i = 0; i < 16; ++i) {
896 if (Val & (1 << i)) {
897 if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder)))
898 return MCDisassembler::Fail;
905 static DecodeStatus DecodeSPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
906 uint64_t Address, const void *Decoder) {
907 DecodeStatus S = MCDisassembler::Success;
909 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
910 unsigned regs = Val & 0xFF;
912 if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
913 return MCDisassembler::Fail;
914 for (unsigned i = 0; i < (regs - 1); ++i) {
915 if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)))
916 return MCDisassembler::Fail;
922 static DecodeStatus DecodeDPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
923 uint64_t Address, const void *Decoder) {
924 DecodeStatus S = MCDisassembler::Success;
926 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
927 unsigned regs = (Val & 0xFF) / 2;
929 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
930 return MCDisassembler::Fail;
931 for (unsigned i = 0; i < (regs - 1); ++i) {
932 if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)))
933 return MCDisassembler::Fail;
939 static DecodeStatus DecodeBitfieldMaskOperand(llvm::MCInst &Inst, unsigned Val,
940 uint64_t Address, const void *Decoder) {
941 // This operand encodes a mask of contiguous zeros between a specified MSB
942 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
943 // the mask of all bits LSB-and-lower, and then xor them to create
944 // the mask of that's all ones on [msb, lsb]. Finally we not it to
945 // create the final mask.
946 unsigned msb = fieldFromInstruction32(Val, 5, 5);
947 unsigned lsb = fieldFromInstruction32(Val, 0, 5);
948 uint32_t msb_mask = (1 << (msb+1)) - 1;
949 uint32_t lsb_mask = (1 << lsb) - 1;
950 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
951 return MCDisassembler::Success;
954 static DecodeStatus DecodeCopMemInstruction(llvm::MCInst &Inst, unsigned Insn,
955 uint64_t Address, const void *Decoder) {
956 DecodeStatus S = MCDisassembler::Success;
958 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
959 unsigned CRd = fieldFromInstruction32(Insn, 12, 4);
960 unsigned coproc = fieldFromInstruction32(Insn, 8, 4);
961 unsigned imm = fieldFromInstruction32(Insn, 0, 8);
962 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
963 unsigned U = fieldFromInstruction32(Insn, 23, 1);
965 switch (Inst.getOpcode()) {
966 case ARM::LDC_OFFSET:
969 case ARM::LDC_OPTION:
970 case ARM::LDCL_OFFSET:
973 case ARM::LDCL_OPTION:
974 case ARM::STC_OFFSET:
977 case ARM::STC_OPTION:
978 case ARM::STCL_OFFSET:
981 case ARM::STCL_OPTION:
982 case ARM::t2LDC_OFFSET:
984 case ARM::t2LDC_POST:
985 case ARM::t2LDC_OPTION:
986 case ARM::t2LDCL_OFFSET:
987 case ARM::t2LDCL_PRE:
988 case ARM::t2LDCL_POST:
989 case ARM::t2LDCL_OPTION:
990 case ARM::t2STC_OFFSET:
992 case ARM::t2STC_POST:
993 case ARM::t2STC_OPTION:
994 case ARM::t2STCL_OFFSET:
995 case ARM::t2STCL_PRE:
996 case ARM::t2STCL_POST:
997 case ARM::t2STCL_OPTION:
998 if (coproc == 0xA || coproc == 0xB)
999 return MCDisassembler::Fail;
1005 Inst.addOperand(MCOperand::CreateImm(coproc));
1006 Inst.addOperand(MCOperand::CreateImm(CRd));
1007 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1008 return MCDisassembler::Fail;
1009 switch (Inst.getOpcode()) {
1010 case ARM::LDC_OPTION:
1011 case ARM::LDCL_OPTION:
1012 case ARM::LDC2_OPTION:
1013 case ARM::LDC2L_OPTION:
1014 case ARM::STC_OPTION:
1015 case ARM::STCL_OPTION:
1016 case ARM::STC2_OPTION:
1017 case ARM::STC2L_OPTION:
1018 case ARM::LDCL_POST:
1019 case ARM::STCL_POST:
1020 case ARM::LDC2L_POST:
1021 case ARM::STC2L_POST:
1022 case ARM::t2LDC_OPTION:
1023 case ARM::t2LDCL_OPTION:
1024 case ARM::t2STC_OPTION:
1025 case ARM::t2STCL_OPTION:
1026 case ARM::t2LDCL_POST:
1027 case ARM::t2STCL_POST:
1030 Inst.addOperand(MCOperand::CreateReg(0));
1034 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1035 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1037 bool writeback = (P == 0) || (W == 1);
1038 unsigned idx_mode = 0;
1040 idx_mode = ARMII::IndexModePre;
1041 else if (!P && writeback)
1042 idx_mode = ARMII::IndexModePost;
1044 switch (Inst.getOpcode()) {
1045 case ARM::LDCL_POST:
1046 case ARM::STCL_POST:
1047 case ARM::t2LDCL_POST:
1048 case ARM::t2STCL_POST:
1049 case ARM::LDC2L_POST:
1050 case ARM::STC2L_POST:
1052 case ARM::LDC_OPTION:
1053 case ARM::LDCL_OPTION:
1054 case ARM::LDC2_OPTION:
1055 case ARM::LDC2L_OPTION:
1056 case ARM::STC_OPTION:
1057 case ARM::STCL_OPTION:
1058 case ARM::STC2_OPTION:
1059 case ARM::STC2L_OPTION:
1060 case ARM::t2LDC_OPTION:
1061 case ARM::t2LDCL_OPTION:
1062 case ARM::t2STC_OPTION:
1063 case ARM::t2STCL_OPTION:
1064 Inst.addOperand(MCOperand::CreateImm(imm));
1068 Inst.addOperand(MCOperand::CreateImm(
1069 ARM_AM::getAM2Opc(ARM_AM::add, imm, ARM_AM::lsl, idx_mode)));
1071 Inst.addOperand(MCOperand::CreateImm(
1072 ARM_AM::getAM2Opc(ARM_AM::sub, imm, ARM_AM::lsl, idx_mode)));
1076 switch (Inst.getOpcode()) {
1077 case ARM::LDC_OFFSET:
1080 case ARM::LDC_OPTION:
1081 case ARM::LDCL_OFFSET:
1083 case ARM::LDCL_POST:
1084 case ARM::LDCL_OPTION:
1085 case ARM::STC_OFFSET:
1088 case ARM::STC_OPTION:
1089 case ARM::STCL_OFFSET:
1091 case ARM::STCL_POST:
1092 case ARM::STCL_OPTION:
1093 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1094 return MCDisassembler::Fail;
1104 DecodeAddrMode2IdxInstruction(llvm::MCInst &Inst, unsigned Insn,
1105 uint64_t Address, const void *Decoder) {
1106 DecodeStatus S = MCDisassembler::Success;
1108 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1109 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1110 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1111 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
1112 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1113 unsigned reg = fieldFromInstruction32(Insn, 25, 1);
1114 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1115 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1117 // On stores, the writeback operand precedes Rt.
1118 switch (Inst.getOpcode()) {
1119 case ARM::STR_POST_IMM:
1120 case ARM::STR_POST_REG:
1121 case ARM::STRB_POST_IMM:
1122 case ARM::STRB_POST_REG:
1123 case ARM::STRT_POST_REG:
1124 case ARM::STRT_POST_IMM:
1125 case ARM::STRBT_POST_REG:
1126 case ARM::STRBT_POST_IMM:
1127 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1128 return MCDisassembler::Fail;
1134 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1135 return MCDisassembler::Fail;
1137 // On loads, the writeback operand comes after Rt.
1138 switch (Inst.getOpcode()) {
1139 case ARM::LDR_POST_IMM:
1140 case ARM::LDR_POST_REG:
1141 case ARM::LDRB_POST_IMM:
1142 case ARM::LDRB_POST_REG:
1143 case ARM::LDRBT_POST_REG:
1144 case ARM::LDRBT_POST_IMM:
1145 case ARM::LDRT_POST_REG:
1146 case ARM::LDRT_POST_IMM:
1147 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1148 return MCDisassembler::Fail;
1154 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1155 return MCDisassembler::Fail;
1157 ARM_AM::AddrOpc Op = ARM_AM::add;
1158 if (!fieldFromInstruction32(Insn, 23, 1))
1161 bool writeback = (P == 0) || (W == 1);
1162 unsigned idx_mode = 0;
1164 idx_mode = ARMII::IndexModePre;
1165 else if (!P && writeback)
1166 idx_mode = ARMII::IndexModePost;
1168 if (writeback && (Rn == 15 || Rn == Rt))
1169 S = MCDisassembler::SoftFail; // UNPREDICTABLE
1172 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1173 return MCDisassembler::Fail;
1174 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1175 switch( fieldFromInstruction32(Insn, 5, 2)) {
1189 return MCDisassembler::Fail;
1191 unsigned amt = fieldFromInstruction32(Insn, 7, 5);
1192 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1194 Inst.addOperand(MCOperand::CreateImm(imm));
1196 Inst.addOperand(MCOperand::CreateReg(0));
1197 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1198 Inst.addOperand(MCOperand::CreateImm(tmp));
1201 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1202 return MCDisassembler::Fail;
1207 static DecodeStatus DecodeSORegMemOperand(llvm::MCInst &Inst, unsigned Val,
1208 uint64_t Address, const void *Decoder) {
1209 DecodeStatus S = MCDisassembler::Success;
1211 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1212 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1213 unsigned type = fieldFromInstruction32(Val, 5, 2);
1214 unsigned imm = fieldFromInstruction32(Val, 7, 5);
1215 unsigned U = fieldFromInstruction32(Val, 12, 1);
1217 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1233 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1234 return MCDisassembler::Fail;
1235 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1236 return MCDisassembler::Fail;
1239 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1241 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1242 Inst.addOperand(MCOperand::CreateImm(shift));
1248 DecodeAddrMode3Instruction(llvm::MCInst &Inst, unsigned Insn,
1249 uint64_t Address, const void *Decoder) {
1250 DecodeStatus S = MCDisassembler::Success;
1252 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1253 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1254 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1255 unsigned type = fieldFromInstruction32(Insn, 22, 1);
1256 unsigned imm = fieldFromInstruction32(Insn, 8, 4);
1257 unsigned U = ((~fieldFromInstruction32(Insn, 23, 1)) & 1) << 8;
1258 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1259 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1260 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1262 bool writeback = (W == 1) | (P == 0);
1264 // For {LD,ST}RD, Rt must be even, else undefined.
1265 switch (Inst.getOpcode()) {
1268 case ARM::STRD_POST:
1271 case ARM::LDRD_POST:
1272 if (Rt & 0x1) return MCDisassembler::Fail;
1278 if (writeback) { // Writeback
1280 U |= ARMII::IndexModePre << 9;
1282 U |= ARMII::IndexModePost << 9;
1284 // On stores, the writeback operand precedes Rt.
1285 switch (Inst.getOpcode()) {
1288 case ARM::STRD_POST:
1291 case ARM::STRH_POST:
1292 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1293 return MCDisassembler::Fail;
1300 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1301 return MCDisassembler::Fail;
1302 switch (Inst.getOpcode()) {
1305 case ARM::STRD_POST:
1308 case ARM::LDRD_POST:
1309 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
1310 return MCDisassembler::Fail;
1317 // On loads, the writeback operand comes after Rt.
1318 switch (Inst.getOpcode()) {
1321 case ARM::LDRD_POST:
1324 case ARM::LDRH_POST:
1326 case ARM::LDRSH_PRE:
1327 case ARM::LDRSH_POST:
1329 case ARM::LDRSB_PRE:
1330 case ARM::LDRSB_POST:
1333 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1334 return MCDisassembler::Fail;
1341 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1342 return MCDisassembler::Fail;
1345 Inst.addOperand(MCOperand::CreateReg(0));
1346 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1348 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1349 return MCDisassembler::Fail;
1350 Inst.addOperand(MCOperand::CreateImm(U));
1353 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1354 return MCDisassembler::Fail;
1359 static DecodeStatus DecodeRFEInstruction(llvm::MCInst &Inst, unsigned Insn,
1360 uint64_t Address, const void *Decoder) {
1361 DecodeStatus S = MCDisassembler::Success;
1363 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1364 unsigned mode = fieldFromInstruction32(Insn, 23, 2);
1381 Inst.addOperand(MCOperand::CreateImm(mode));
1382 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1383 return MCDisassembler::Fail;
1388 static DecodeStatus DecodeMemMultipleWritebackInstruction(llvm::MCInst &Inst,
1390 uint64_t Address, const void *Decoder) {
1391 DecodeStatus S = MCDisassembler::Success;
1393 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1394 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1395 unsigned reglist = fieldFromInstruction32(Insn, 0, 16);
1398 switch (Inst.getOpcode()) {
1400 Inst.setOpcode(ARM::RFEDA);
1402 case ARM::LDMDA_UPD:
1403 Inst.setOpcode(ARM::RFEDA_UPD);
1406 Inst.setOpcode(ARM::RFEDB);
1408 case ARM::LDMDB_UPD:
1409 Inst.setOpcode(ARM::RFEDB_UPD);
1412 Inst.setOpcode(ARM::RFEIA);
1414 case ARM::LDMIA_UPD:
1415 Inst.setOpcode(ARM::RFEIA_UPD);
1418 Inst.setOpcode(ARM::RFEIB);
1420 case ARM::LDMIB_UPD:
1421 Inst.setOpcode(ARM::RFEIB_UPD);
1424 Inst.setOpcode(ARM::SRSDA);
1426 case ARM::STMDA_UPD:
1427 Inst.setOpcode(ARM::SRSDA_UPD);
1430 Inst.setOpcode(ARM::SRSDB);
1432 case ARM::STMDB_UPD:
1433 Inst.setOpcode(ARM::SRSDB_UPD);
1436 Inst.setOpcode(ARM::SRSIA);
1438 case ARM::STMIA_UPD:
1439 Inst.setOpcode(ARM::SRSIA_UPD);
1442 Inst.setOpcode(ARM::SRSIB);
1444 case ARM::STMIB_UPD:
1445 Inst.setOpcode(ARM::SRSIB_UPD);
1448 if (!Check(S, MCDisassembler::Fail)) return MCDisassembler::Fail;
1451 // For stores (which become SRS's, the only operand is the mode.
1452 if (fieldFromInstruction32(Insn, 20, 1) == 0) {
1454 MCOperand::CreateImm(fieldFromInstruction32(Insn, 0, 4)));
1458 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1461 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1462 return MCDisassembler::Fail;
1463 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1464 return MCDisassembler::Fail; // Tied
1465 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1466 return MCDisassembler::Fail;
1467 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
1468 return MCDisassembler::Fail;
1473 static DecodeStatus DecodeCPSInstruction(llvm::MCInst &Inst, unsigned Insn,
1474 uint64_t Address, const void *Decoder) {
1475 unsigned imod = fieldFromInstruction32(Insn, 18, 2);
1476 unsigned M = fieldFromInstruction32(Insn, 17, 1);
1477 unsigned iflags = fieldFromInstruction32(Insn, 6, 3);
1478 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1480 DecodeStatus S = MCDisassembler::Success;
1482 // imod == '01' --> UNPREDICTABLE
1483 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1484 // return failure here. The '01' imod value is unprintable, so there's
1485 // nothing useful we could do even if we returned UNPREDICTABLE.
1487 if (imod == 1) return MCDisassembler::Fail;
1490 Inst.setOpcode(ARM::CPS3p);
1491 Inst.addOperand(MCOperand::CreateImm(imod));
1492 Inst.addOperand(MCOperand::CreateImm(iflags));
1493 Inst.addOperand(MCOperand::CreateImm(mode));
1494 } else if (imod && !M) {
1495 Inst.setOpcode(ARM::CPS2p);
1496 Inst.addOperand(MCOperand::CreateImm(imod));
1497 Inst.addOperand(MCOperand::CreateImm(iflags));
1498 if (mode) S = MCDisassembler::SoftFail;
1499 } else if (!imod && M) {
1500 Inst.setOpcode(ARM::CPS1p);
1501 Inst.addOperand(MCOperand::CreateImm(mode));
1502 if (iflags) S = MCDisassembler::SoftFail;
1504 // imod == '00' && M == '0' --> UNPREDICTABLE
1505 Inst.setOpcode(ARM::CPS1p);
1506 Inst.addOperand(MCOperand::CreateImm(mode));
1507 S = MCDisassembler::SoftFail;
1513 static DecodeStatus DecodeT2CPSInstruction(llvm::MCInst &Inst, unsigned Insn,
1514 uint64_t Address, const void *Decoder) {
1515 unsigned imod = fieldFromInstruction32(Insn, 9, 2);
1516 unsigned M = fieldFromInstruction32(Insn, 8, 1);
1517 unsigned iflags = fieldFromInstruction32(Insn, 5, 3);
1518 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1520 DecodeStatus S = MCDisassembler::Success;
1522 // imod == '01' --> UNPREDICTABLE
1523 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1524 // return failure here. The '01' imod value is unprintable, so there's
1525 // nothing useful we could do even if we returned UNPREDICTABLE.
1527 if (imod == 1) return MCDisassembler::Fail;
1530 Inst.setOpcode(ARM::t2CPS3p);
1531 Inst.addOperand(MCOperand::CreateImm(imod));
1532 Inst.addOperand(MCOperand::CreateImm(iflags));
1533 Inst.addOperand(MCOperand::CreateImm(mode));
1534 } else if (imod && !M) {
1535 Inst.setOpcode(ARM::t2CPS2p);
1536 Inst.addOperand(MCOperand::CreateImm(imod));
1537 Inst.addOperand(MCOperand::CreateImm(iflags));
1538 if (mode) S = MCDisassembler::SoftFail;
1539 } else if (!imod && M) {
1540 Inst.setOpcode(ARM::t2CPS1p);
1541 Inst.addOperand(MCOperand::CreateImm(mode));
1542 if (iflags) S = MCDisassembler::SoftFail;
1544 // imod == '00' && M == '0' --> UNPREDICTABLE
1545 Inst.setOpcode(ARM::t2CPS1p);
1546 Inst.addOperand(MCOperand::CreateImm(mode));
1547 S = MCDisassembler::SoftFail;
1554 static DecodeStatus DecodeSMLAInstruction(llvm::MCInst &Inst, unsigned Insn,
1555 uint64_t Address, const void *Decoder) {
1556 DecodeStatus S = MCDisassembler::Success;
1558 unsigned Rd = fieldFromInstruction32(Insn, 16, 4);
1559 unsigned Rn = fieldFromInstruction32(Insn, 0, 4);
1560 unsigned Rm = fieldFromInstruction32(Insn, 8, 4);
1561 unsigned Ra = fieldFromInstruction32(Insn, 12, 4);
1562 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1565 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
1567 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1568 return MCDisassembler::Fail;
1569 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
1570 return MCDisassembler::Fail;
1571 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1572 return MCDisassembler::Fail;
1573 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
1574 return MCDisassembler::Fail;
1576 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1577 return MCDisassembler::Fail;
1582 static DecodeStatus DecodeAddrModeImm12Operand(llvm::MCInst &Inst, unsigned Val,
1583 uint64_t Address, const void *Decoder) {
1584 DecodeStatus S = MCDisassembler::Success;
1586 unsigned add = fieldFromInstruction32(Val, 12, 1);
1587 unsigned imm = fieldFromInstruction32(Val, 0, 12);
1588 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1590 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1591 return MCDisassembler::Fail;
1593 if (!add) imm *= -1;
1594 if (imm == 0 && !add) imm = INT32_MIN;
1595 Inst.addOperand(MCOperand::CreateImm(imm));
1600 static DecodeStatus DecodeAddrMode5Operand(llvm::MCInst &Inst, unsigned Val,
1601 uint64_t Address, const void *Decoder) {
1602 DecodeStatus S = MCDisassembler::Success;
1604 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
1605 unsigned U = fieldFromInstruction32(Val, 8, 1);
1606 unsigned imm = fieldFromInstruction32(Val, 0, 8);
1608 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1609 return MCDisassembler::Fail;
1612 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
1614 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
1619 static DecodeStatus DecodeAddrMode7Operand(llvm::MCInst &Inst, unsigned Val,
1620 uint64_t Address, const void *Decoder) {
1621 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
1625 DecodeBranchImmInstruction(llvm::MCInst &Inst, unsigned Insn,
1626 uint64_t Address, const void *Decoder) {
1627 DecodeStatus S = MCDisassembler::Success;
1629 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1630 unsigned imm = fieldFromInstruction32(Insn, 0, 24) << 2;
1633 Inst.setOpcode(ARM::BLXi);
1634 imm |= fieldFromInstruction32(Insn, 24, 1) << 1;
1635 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1639 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1640 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1641 return MCDisassembler::Fail;
1647 static DecodeStatus DecodeVCVTImmOperand(llvm::MCInst &Inst, unsigned Val,
1648 uint64_t Address, const void *Decoder) {
1649 Inst.addOperand(MCOperand::CreateImm(64 - Val));
1650 return MCDisassembler::Success;
1653 static DecodeStatus DecodeAddrMode6Operand(llvm::MCInst &Inst, unsigned Val,
1654 uint64_t Address, const void *Decoder) {
1655 DecodeStatus S = MCDisassembler::Success;
1657 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1658 unsigned align = fieldFromInstruction32(Val, 4, 2);
1660 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1661 return MCDisassembler::Fail;
1663 Inst.addOperand(MCOperand::CreateImm(0));
1665 Inst.addOperand(MCOperand::CreateImm(4 << align));
1670 static DecodeStatus DecodeVLDInstruction(llvm::MCInst &Inst, unsigned Insn,
1671 uint64_t Address, const void *Decoder) {
1672 DecodeStatus S = MCDisassembler::Success;
1674 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1675 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1676 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
1677 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1678 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
1679 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1681 // First output register
1682 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
1683 return MCDisassembler::Fail;
1685 // Second output register
1686 switch (Inst.getOpcode()) {
1691 case ARM::VLD1q8_UPD:
1692 case ARM::VLD1q16_UPD:
1693 case ARM::VLD1q32_UPD:
1694 case ARM::VLD1q64_UPD:
1699 case ARM::VLD1d8T_UPD:
1700 case ARM::VLD1d16T_UPD:
1701 case ARM::VLD1d32T_UPD:
1702 case ARM::VLD1d64T_UPD:
1707 case ARM::VLD1d8Q_UPD:
1708 case ARM::VLD1d16Q_UPD:
1709 case ARM::VLD1d32Q_UPD:
1710 case ARM::VLD1d64Q_UPD:
1714 case ARM::VLD2d8_UPD:
1715 case ARM::VLD2d16_UPD:
1716 case ARM::VLD2d32_UPD:
1720 case ARM::VLD2q8_UPD:
1721 case ARM::VLD2q16_UPD:
1722 case ARM::VLD2q32_UPD:
1726 case ARM::VLD3d8_UPD:
1727 case ARM::VLD3d16_UPD:
1728 case ARM::VLD3d32_UPD:
1732 case ARM::VLD4d8_UPD:
1733 case ARM::VLD4d16_UPD:
1734 case ARM::VLD4d32_UPD:
1735 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
1736 return MCDisassembler::Fail;
1741 case ARM::VLD2b8_UPD:
1742 case ARM::VLD2b16_UPD:
1743 case ARM::VLD2b32_UPD:
1747 case ARM::VLD3q8_UPD:
1748 case ARM::VLD3q16_UPD:
1749 case ARM::VLD3q32_UPD:
1753 case ARM::VLD4q8_UPD:
1754 case ARM::VLD4q16_UPD:
1755 case ARM::VLD4q32_UPD:
1756 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
1757 return MCDisassembler::Fail;
1762 // Third output register
1763 switch(Inst.getOpcode()) {
1768 case ARM::VLD1d8T_UPD:
1769 case ARM::VLD1d16T_UPD:
1770 case ARM::VLD1d32T_UPD:
1771 case ARM::VLD1d64T_UPD:
1776 case ARM::VLD1d8Q_UPD:
1777 case ARM::VLD1d16Q_UPD:
1778 case ARM::VLD1d32Q_UPD:
1779 case ARM::VLD1d64Q_UPD:
1783 case ARM::VLD2q8_UPD:
1784 case ARM::VLD2q16_UPD:
1785 case ARM::VLD2q32_UPD:
1789 case ARM::VLD3d8_UPD:
1790 case ARM::VLD3d16_UPD:
1791 case ARM::VLD3d32_UPD:
1795 case ARM::VLD4d8_UPD:
1796 case ARM::VLD4d16_UPD:
1797 case ARM::VLD4d32_UPD:
1798 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
1799 return MCDisassembler::Fail;
1804 case ARM::VLD3q8_UPD:
1805 case ARM::VLD3q16_UPD:
1806 case ARM::VLD3q32_UPD:
1810 case ARM::VLD4q8_UPD:
1811 case ARM::VLD4q16_UPD:
1812 case ARM::VLD4q32_UPD:
1813 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
1814 return MCDisassembler::Fail;
1820 // Fourth output register
1821 switch (Inst.getOpcode()) {
1826 case ARM::VLD1d8Q_UPD:
1827 case ARM::VLD1d16Q_UPD:
1828 case ARM::VLD1d32Q_UPD:
1829 case ARM::VLD1d64Q_UPD:
1833 case ARM::VLD2q8_UPD:
1834 case ARM::VLD2q16_UPD:
1835 case ARM::VLD2q32_UPD:
1839 case ARM::VLD4d8_UPD:
1840 case ARM::VLD4d16_UPD:
1841 case ARM::VLD4d32_UPD:
1842 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
1843 return MCDisassembler::Fail;
1848 case ARM::VLD4q8_UPD:
1849 case ARM::VLD4q16_UPD:
1850 case ARM::VLD4q32_UPD:
1851 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
1852 return MCDisassembler::Fail;
1858 // Writeback operand
1859 switch (Inst.getOpcode()) {
1860 case ARM::VLD1d8_UPD:
1861 case ARM::VLD1d16_UPD:
1862 case ARM::VLD1d32_UPD:
1863 case ARM::VLD1d64_UPD:
1864 case ARM::VLD1q8_UPD:
1865 case ARM::VLD1q16_UPD:
1866 case ARM::VLD1q32_UPD:
1867 case ARM::VLD1q64_UPD:
1868 case ARM::VLD1d8T_UPD:
1869 case ARM::VLD1d16T_UPD:
1870 case ARM::VLD1d32T_UPD:
1871 case ARM::VLD1d64T_UPD:
1872 case ARM::VLD1d8Q_UPD:
1873 case ARM::VLD1d16Q_UPD:
1874 case ARM::VLD1d32Q_UPD:
1875 case ARM::VLD1d64Q_UPD:
1876 case ARM::VLD2d8_UPD:
1877 case ARM::VLD2d16_UPD:
1878 case ARM::VLD2d32_UPD:
1879 case ARM::VLD2q8_UPD:
1880 case ARM::VLD2q16_UPD:
1881 case ARM::VLD2q32_UPD:
1882 case ARM::VLD2b8_UPD:
1883 case ARM::VLD2b16_UPD:
1884 case ARM::VLD2b32_UPD:
1885 case ARM::VLD3d8_UPD:
1886 case ARM::VLD3d16_UPD:
1887 case ARM::VLD3d32_UPD:
1888 case ARM::VLD3q8_UPD:
1889 case ARM::VLD3q16_UPD:
1890 case ARM::VLD3q32_UPD:
1891 case ARM::VLD4d8_UPD:
1892 case ARM::VLD4d16_UPD:
1893 case ARM::VLD4d32_UPD:
1894 case ARM::VLD4q8_UPD:
1895 case ARM::VLD4q16_UPD:
1896 case ARM::VLD4q32_UPD:
1897 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
1898 return MCDisassembler::Fail;
1904 // AddrMode6 Base (register+alignment)
1905 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
1906 return MCDisassembler::Fail;
1908 // AddrMode6 Offset (register)
1910 Inst.addOperand(MCOperand::CreateReg(0));
1911 else if (Rm != 0xF) {
1912 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1913 return MCDisassembler::Fail;
1919 static DecodeStatus DecodeVSTInstruction(llvm::MCInst &Inst, unsigned Insn,
1920 uint64_t Address, const void *Decoder) {
1921 DecodeStatus S = MCDisassembler::Success;
1923 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1924 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1925 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
1926 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1927 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
1928 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1930 // Writeback Operand
1931 switch (Inst.getOpcode()) {
1932 case ARM::VST1d8_UPD:
1933 case ARM::VST1d16_UPD:
1934 case ARM::VST1d32_UPD:
1935 case ARM::VST1d64_UPD:
1936 case ARM::VST1q8_UPD:
1937 case ARM::VST1q16_UPD:
1938 case ARM::VST1q32_UPD:
1939 case ARM::VST1q64_UPD:
1940 case ARM::VST1d8T_UPD:
1941 case ARM::VST1d16T_UPD:
1942 case ARM::VST1d32T_UPD:
1943 case ARM::VST1d64T_UPD:
1944 case ARM::VST1d8Q_UPD:
1945 case ARM::VST1d16Q_UPD:
1946 case ARM::VST1d32Q_UPD:
1947 case ARM::VST1d64Q_UPD:
1948 case ARM::VST2d8_UPD:
1949 case ARM::VST2d16_UPD:
1950 case ARM::VST2d32_UPD:
1951 case ARM::VST2q8_UPD:
1952 case ARM::VST2q16_UPD:
1953 case ARM::VST2q32_UPD:
1954 case ARM::VST2b8_UPD:
1955 case ARM::VST2b16_UPD:
1956 case ARM::VST2b32_UPD:
1957 case ARM::VST3d8_UPD:
1958 case ARM::VST3d16_UPD:
1959 case ARM::VST3d32_UPD:
1960 case ARM::VST3q8_UPD:
1961 case ARM::VST3q16_UPD:
1962 case ARM::VST3q32_UPD:
1963 case ARM::VST4d8_UPD:
1964 case ARM::VST4d16_UPD:
1965 case ARM::VST4d32_UPD:
1966 case ARM::VST4q8_UPD:
1967 case ARM::VST4q16_UPD:
1968 case ARM::VST4q32_UPD:
1969 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
1970 return MCDisassembler::Fail;
1976 // AddrMode6 Base (register+alignment)
1977 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
1978 return MCDisassembler::Fail;
1980 // AddrMode6 Offset (register)
1982 Inst.addOperand(MCOperand::CreateReg(0));
1983 else if (Rm != 0xF) {
1984 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1985 return MCDisassembler::Fail;
1988 // First input register
1989 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
1990 return MCDisassembler::Fail;
1992 // Second input register
1993 switch (Inst.getOpcode()) {
1998 case ARM::VST1q8_UPD:
1999 case ARM::VST1q16_UPD:
2000 case ARM::VST1q32_UPD:
2001 case ARM::VST1q64_UPD:
2006 case ARM::VST1d8T_UPD:
2007 case ARM::VST1d16T_UPD:
2008 case ARM::VST1d32T_UPD:
2009 case ARM::VST1d64T_UPD:
2014 case ARM::VST1d8Q_UPD:
2015 case ARM::VST1d16Q_UPD:
2016 case ARM::VST1d32Q_UPD:
2017 case ARM::VST1d64Q_UPD:
2021 case ARM::VST2d8_UPD:
2022 case ARM::VST2d16_UPD:
2023 case ARM::VST2d32_UPD:
2027 case ARM::VST2q8_UPD:
2028 case ARM::VST2q16_UPD:
2029 case ARM::VST2q32_UPD:
2033 case ARM::VST3d8_UPD:
2034 case ARM::VST3d16_UPD:
2035 case ARM::VST3d32_UPD:
2039 case ARM::VST4d8_UPD:
2040 case ARM::VST4d16_UPD:
2041 case ARM::VST4d32_UPD:
2042 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2043 return MCDisassembler::Fail;
2048 case ARM::VST2b8_UPD:
2049 case ARM::VST2b16_UPD:
2050 case ARM::VST2b32_UPD:
2054 case ARM::VST3q8_UPD:
2055 case ARM::VST3q16_UPD:
2056 case ARM::VST3q32_UPD:
2060 case ARM::VST4q8_UPD:
2061 case ARM::VST4q16_UPD:
2062 case ARM::VST4q32_UPD:
2063 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2064 return MCDisassembler::Fail;
2070 // Third input register
2071 switch (Inst.getOpcode()) {
2076 case ARM::VST1d8T_UPD:
2077 case ARM::VST1d16T_UPD:
2078 case ARM::VST1d32T_UPD:
2079 case ARM::VST1d64T_UPD:
2084 case ARM::VST1d8Q_UPD:
2085 case ARM::VST1d16Q_UPD:
2086 case ARM::VST1d32Q_UPD:
2087 case ARM::VST1d64Q_UPD:
2091 case ARM::VST2q8_UPD:
2092 case ARM::VST2q16_UPD:
2093 case ARM::VST2q32_UPD:
2097 case ARM::VST3d8_UPD:
2098 case ARM::VST3d16_UPD:
2099 case ARM::VST3d32_UPD:
2103 case ARM::VST4d8_UPD:
2104 case ARM::VST4d16_UPD:
2105 case ARM::VST4d32_UPD:
2106 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2107 return MCDisassembler::Fail;
2112 case ARM::VST3q8_UPD:
2113 case ARM::VST3q16_UPD:
2114 case ARM::VST3q32_UPD:
2118 case ARM::VST4q8_UPD:
2119 case ARM::VST4q16_UPD:
2120 case ARM::VST4q32_UPD:
2121 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2122 return MCDisassembler::Fail;
2128 // Fourth input register
2129 switch (Inst.getOpcode()) {
2134 case ARM::VST1d8Q_UPD:
2135 case ARM::VST1d16Q_UPD:
2136 case ARM::VST1d32Q_UPD:
2137 case ARM::VST1d64Q_UPD:
2141 case ARM::VST2q8_UPD:
2142 case ARM::VST2q16_UPD:
2143 case ARM::VST2q32_UPD:
2147 case ARM::VST4d8_UPD:
2148 case ARM::VST4d16_UPD:
2149 case ARM::VST4d32_UPD:
2150 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2151 return MCDisassembler::Fail;
2156 case ARM::VST4q8_UPD:
2157 case ARM::VST4q16_UPD:
2158 case ARM::VST4q32_UPD:
2159 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2160 return MCDisassembler::Fail;
2169 static DecodeStatus DecodeVLD1DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2170 uint64_t Address, const void *Decoder) {
2171 DecodeStatus S = MCDisassembler::Success;
2173 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2174 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2175 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2176 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2177 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2178 unsigned size = fieldFromInstruction32(Insn, 6, 2);
2179 unsigned regs = fieldFromInstruction32(Insn, 5, 1) + 1;
2181 align *= (1 << size);
2183 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2184 return MCDisassembler::Fail;
2186 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2187 return MCDisassembler::Fail;
2190 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2191 return MCDisassembler::Fail;
2194 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2195 return MCDisassembler::Fail;
2196 Inst.addOperand(MCOperand::CreateImm(align));
2199 Inst.addOperand(MCOperand::CreateReg(0));
2200 else if (Rm != 0xF) {
2201 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2202 return MCDisassembler::Fail;
2208 static DecodeStatus DecodeVLD2DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2209 uint64_t Address, const void *Decoder) {
2210 DecodeStatus S = MCDisassembler::Success;
2212 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2213 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2214 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2215 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2216 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2217 unsigned size = 1 << fieldFromInstruction32(Insn, 6, 2);
2218 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2221 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2222 return MCDisassembler::Fail;
2223 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2224 return MCDisassembler::Fail;
2226 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2227 return MCDisassembler::Fail;
2230 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2231 return MCDisassembler::Fail;
2232 Inst.addOperand(MCOperand::CreateImm(align));
2235 Inst.addOperand(MCOperand::CreateReg(0));
2236 else if (Rm != 0xF) {
2237 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2238 return MCDisassembler::Fail;
2244 static DecodeStatus DecodeVLD3DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2245 uint64_t Address, const void *Decoder) {
2246 DecodeStatus S = MCDisassembler::Success;
2248 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2249 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2250 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2251 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2252 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2254 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2255 return MCDisassembler::Fail;
2256 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2257 return MCDisassembler::Fail;
2258 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2259 return MCDisassembler::Fail;
2261 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2262 return MCDisassembler::Fail;
2265 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2266 return MCDisassembler::Fail;
2267 Inst.addOperand(MCOperand::CreateImm(0));
2270 Inst.addOperand(MCOperand::CreateReg(0));
2271 else if (Rm != 0xF) {
2272 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2273 return MCDisassembler::Fail;
2279 static DecodeStatus DecodeVLD4DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2280 uint64_t Address, const void *Decoder) {
2281 DecodeStatus S = MCDisassembler::Success;
2283 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2284 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2285 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2286 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2287 unsigned size = fieldFromInstruction32(Insn, 6, 2);
2288 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2289 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2304 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2305 return MCDisassembler::Fail;
2306 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2307 return MCDisassembler::Fail;
2308 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2309 return MCDisassembler::Fail;
2310 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
2311 return MCDisassembler::Fail;
2313 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2314 return MCDisassembler::Fail;
2317 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2318 return MCDisassembler::Fail;
2319 Inst.addOperand(MCOperand::CreateImm(align));
2322 Inst.addOperand(MCOperand::CreateReg(0));
2323 else if (Rm != 0xF) {
2324 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2325 return MCDisassembler::Fail;
2332 DecodeNEONModImmInstruction(llvm::MCInst &Inst, unsigned Insn,
2333 uint64_t Address, const void *Decoder) {
2334 DecodeStatus S = MCDisassembler::Success;
2336 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2337 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2338 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
2339 imm |= fieldFromInstruction32(Insn, 16, 3) << 4;
2340 imm |= fieldFromInstruction32(Insn, 24, 1) << 7;
2341 imm |= fieldFromInstruction32(Insn, 8, 4) << 8;
2342 imm |= fieldFromInstruction32(Insn, 5, 1) << 12;
2343 unsigned Q = fieldFromInstruction32(Insn, 6, 1);
2346 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2347 return MCDisassembler::Fail;
2349 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2350 return MCDisassembler::Fail;
2353 Inst.addOperand(MCOperand::CreateImm(imm));
2355 switch (Inst.getOpcode()) {
2356 case ARM::VORRiv4i16:
2357 case ARM::VORRiv2i32:
2358 case ARM::VBICiv4i16:
2359 case ARM::VBICiv2i32:
2360 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2361 return MCDisassembler::Fail;
2363 case ARM::VORRiv8i16:
2364 case ARM::VORRiv4i32:
2365 case ARM::VBICiv8i16:
2366 case ARM::VBICiv4i32:
2367 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2368 return MCDisassembler::Fail;
2377 static DecodeStatus DecodeVSHLMaxInstruction(llvm::MCInst &Inst, unsigned Insn,
2378 uint64_t Address, const void *Decoder) {
2379 DecodeStatus S = MCDisassembler::Success;
2381 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2382 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2383 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2384 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2385 unsigned size = fieldFromInstruction32(Insn, 18, 2);
2387 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2388 return MCDisassembler::Fail;
2389 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2390 return MCDisassembler::Fail;
2391 Inst.addOperand(MCOperand::CreateImm(8 << size));
2396 static DecodeStatus DecodeShiftRight8Imm(llvm::MCInst &Inst, unsigned Val,
2397 uint64_t Address, const void *Decoder) {
2398 Inst.addOperand(MCOperand::CreateImm(8 - Val));
2399 return MCDisassembler::Success;
2402 static DecodeStatus DecodeShiftRight16Imm(llvm::MCInst &Inst, unsigned Val,
2403 uint64_t Address, const void *Decoder) {
2404 Inst.addOperand(MCOperand::CreateImm(16 - Val));
2405 return MCDisassembler::Success;
2408 static DecodeStatus DecodeShiftRight32Imm(llvm::MCInst &Inst, unsigned Val,
2409 uint64_t Address, const void *Decoder) {
2410 Inst.addOperand(MCOperand::CreateImm(32 - Val));
2411 return MCDisassembler::Success;
2414 static DecodeStatus DecodeShiftRight64Imm(llvm::MCInst &Inst, unsigned Val,
2415 uint64_t Address, const void *Decoder) {
2416 Inst.addOperand(MCOperand::CreateImm(64 - Val));
2417 return MCDisassembler::Success;
2420 static DecodeStatus DecodeTBLInstruction(llvm::MCInst &Inst, unsigned Insn,
2421 uint64_t Address, const void *Decoder) {
2422 DecodeStatus S = MCDisassembler::Success;
2424 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2425 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2426 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2427 Rn |= fieldFromInstruction32(Insn, 7, 1) << 4;
2428 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2429 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2430 unsigned op = fieldFromInstruction32(Insn, 6, 1);
2431 unsigned length = fieldFromInstruction32(Insn, 8, 2) + 1;
2433 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2434 return MCDisassembler::Fail;
2436 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2437 return MCDisassembler::Fail; // Writeback
2440 for (unsigned i = 0; i < length; ++i) {
2441 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rn+i)%32, Address, Decoder)))
2442 return MCDisassembler::Fail;
2445 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2446 return MCDisassembler::Fail;
2451 static DecodeStatus DecodeVFPfpImm(llvm::MCInst &Inst, unsigned Val,
2452 uint64_t Address, const void *Decoder) {
2453 // The immediate needs to be a fully instantiated float. However, the
2454 // auto-generated decoder is only able to fill in some of the bits
2455 // necessary. For instance, the 'b' bit is replicated multiple times,
2456 // and is even present in inverted form in one bit. We do a little
2457 // binary parsing here to fill in those missing bits, and then
2458 // reinterpret it all as a float.
2464 fp_conv.integer = Val;
2465 uint32_t b = fieldFromInstruction32(Val, 25, 1);
2466 fp_conv.integer |= b << 26;
2467 fp_conv.integer |= b << 27;
2468 fp_conv.integer |= b << 28;
2469 fp_conv.integer |= b << 29;
2470 fp_conv.integer |= (~b & 0x1) << 30;
2472 Inst.addOperand(MCOperand::CreateFPImm(fp_conv.fp));
2473 return MCDisassembler::Success;
2476 static DecodeStatus DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn,
2477 uint64_t Address, const void *Decoder) {
2478 DecodeStatus S = MCDisassembler::Success;
2480 unsigned dst = fieldFromInstruction16(Insn, 8, 3);
2481 unsigned imm = fieldFromInstruction16(Insn, 0, 8);
2483 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
2484 return MCDisassembler::Fail;
2486 switch(Inst.getOpcode()) {
2488 return MCDisassembler::Fail;
2490 break; // tADR does not explicitly represent the PC as an operand.
2492 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2496 Inst.addOperand(MCOperand::CreateImm(imm));
2500 static DecodeStatus DecodeThumbBROperand(llvm::MCInst &Inst, unsigned Val,
2501 uint64_t Address, const void *Decoder) {
2502 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
2503 return MCDisassembler::Success;
2506 static DecodeStatus DecodeT2BROperand(llvm::MCInst &Inst, unsigned Val,
2507 uint64_t Address, const void *Decoder) {
2508 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
2509 return MCDisassembler::Success;
2512 static DecodeStatus DecodeThumbCmpBROperand(llvm::MCInst &Inst, unsigned Val,
2513 uint64_t Address, const void *Decoder) {
2514 Inst.addOperand(MCOperand::CreateImm(SignExtend32<7>(Val << 1)));
2515 return MCDisassembler::Success;
2518 static DecodeStatus DecodeThumbAddrModeRR(llvm::MCInst &Inst, unsigned Val,
2519 uint64_t Address, const void *Decoder) {
2520 DecodeStatus S = MCDisassembler::Success;
2522 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2523 unsigned Rm = fieldFromInstruction32(Val, 3, 3);
2525 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
2526 return MCDisassembler::Fail;
2527 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
2528 return MCDisassembler::Fail;
2533 static DecodeStatus DecodeThumbAddrModeIS(llvm::MCInst &Inst, unsigned Val,
2534 uint64_t Address, const void *Decoder) {
2535 DecodeStatus S = MCDisassembler::Success;
2537 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2538 unsigned imm = fieldFromInstruction32(Val, 3, 5);
2540 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
2541 return MCDisassembler::Fail;
2542 Inst.addOperand(MCOperand::CreateImm(imm));
2547 static DecodeStatus DecodeThumbAddrModePC(llvm::MCInst &Inst, unsigned Val,
2548 uint64_t Address, const void *Decoder) {
2549 Inst.addOperand(MCOperand::CreateImm(Val << 2));
2551 return MCDisassembler::Success;
2554 static DecodeStatus DecodeThumbAddrModeSP(llvm::MCInst &Inst, unsigned Val,
2555 uint64_t Address, const void *Decoder) {
2556 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2557 Inst.addOperand(MCOperand::CreateImm(Val));
2559 return MCDisassembler::Success;
2562 static DecodeStatus DecodeT2AddrModeSOReg(llvm::MCInst &Inst, unsigned Val,
2563 uint64_t Address, const void *Decoder) {
2564 DecodeStatus S = MCDisassembler::Success;
2566 unsigned Rn = fieldFromInstruction32(Val, 6, 4);
2567 unsigned Rm = fieldFromInstruction32(Val, 2, 4);
2568 unsigned imm = fieldFromInstruction32(Val, 0, 2);
2570 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2571 return MCDisassembler::Fail;
2572 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
2573 return MCDisassembler::Fail;
2574 Inst.addOperand(MCOperand::CreateImm(imm));
2579 static DecodeStatus DecodeT2LoadShift(llvm::MCInst &Inst, unsigned Insn,
2580 uint64_t Address, const void *Decoder) {
2581 DecodeStatus S = MCDisassembler::Success;
2583 switch (Inst.getOpcode()) {
2589 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2590 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
2591 return MCDisassembler::Fail;
2595 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2597 switch (Inst.getOpcode()) {
2599 Inst.setOpcode(ARM::t2LDRBpci);
2602 Inst.setOpcode(ARM::t2LDRHpci);
2605 Inst.setOpcode(ARM::t2LDRSHpci);
2608 Inst.setOpcode(ARM::t2LDRSBpci);
2611 Inst.setOpcode(ARM::t2PLDi12);
2612 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
2615 return MCDisassembler::Fail;
2618 int imm = fieldFromInstruction32(Insn, 0, 12);
2619 if (!fieldFromInstruction32(Insn, 23, 1)) imm *= -1;
2620 Inst.addOperand(MCOperand::CreateImm(imm));
2625 unsigned addrmode = fieldFromInstruction32(Insn, 4, 2);
2626 addrmode |= fieldFromInstruction32(Insn, 0, 4) << 2;
2627 addrmode |= fieldFromInstruction32(Insn, 16, 4) << 6;
2628 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
2629 return MCDisassembler::Fail;
2634 static DecodeStatus DecodeT2Imm8S4(llvm::MCInst &Inst, unsigned Val,
2635 uint64_t Address, const void *Decoder) {
2636 int imm = Val & 0xFF;
2637 if (!(Val & 0x100)) imm *= -1;
2638 Inst.addOperand(MCOperand::CreateImm(imm << 2));
2640 return MCDisassembler::Success;
2643 static DecodeStatus DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val,
2644 uint64_t Address, const void *Decoder) {
2645 DecodeStatus S = MCDisassembler::Success;
2647 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2648 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2650 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2651 return MCDisassembler::Fail;
2652 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
2653 return MCDisassembler::Fail;
2658 static DecodeStatus DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
2659 uint64_t Address, const void *Decoder) {
2660 int imm = Val & 0xFF;
2661 if (!(Val & 0x100)) imm *= -1;
2662 Inst.addOperand(MCOperand::CreateImm(imm));
2664 return MCDisassembler::Success;
2668 static DecodeStatus DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val,
2669 uint64_t Address, const void *Decoder) {
2670 DecodeStatus S = MCDisassembler::Success;
2672 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2673 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2675 // Some instructions always use an additive offset.
2676 switch (Inst.getOpcode()) {
2688 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2689 return MCDisassembler::Fail;
2690 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
2691 return MCDisassembler::Fail;
2697 static DecodeStatus DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val,
2698 uint64_t Address, const void *Decoder) {
2699 DecodeStatus S = MCDisassembler::Success;
2701 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
2702 unsigned imm = fieldFromInstruction32(Val, 0, 12);
2704 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2705 return MCDisassembler::Fail;
2706 Inst.addOperand(MCOperand::CreateImm(imm));
2712 static DecodeStatus DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Insn,
2713 uint64_t Address, const void *Decoder) {
2714 unsigned imm = fieldFromInstruction16(Insn, 0, 7);
2716 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2717 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2718 Inst.addOperand(MCOperand::CreateImm(imm));
2720 return MCDisassembler::Success;
2723 static DecodeStatus DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn,
2724 uint64_t Address, const void *Decoder) {
2725 DecodeStatus S = MCDisassembler::Success;
2727 if (Inst.getOpcode() == ARM::tADDrSP) {
2728 unsigned Rdm = fieldFromInstruction16(Insn, 0, 3);
2729 Rdm |= fieldFromInstruction16(Insn, 7, 1) << 3;
2731 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
2732 return MCDisassembler::Fail;
2733 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
2734 return MCDisassembler::Fail;
2735 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2736 } else if (Inst.getOpcode() == ARM::tADDspr) {
2737 unsigned Rm = fieldFromInstruction16(Insn, 3, 4);
2739 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2740 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2741 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2742 return MCDisassembler::Fail;
2748 static DecodeStatus DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn,
2749 uint64_t Address, const void *Decoder) {
2750 unsigned imod = fieldFromInstruction16(Insn, 4, 1) | 0x2;
2751 unsigned flags = fieldFromInstruction16(Insn, 0, 3);
2753 Inst.addOperand(MCOperand::CreateImm(imod));
2754 Inst.addOperand(MCOperand::CreateImm(flags));
2756 return MCDisassembler::Success;
2759 static DecodeStatus DecodePostIdxReg(llvm::MCInst &Inst, unsigned Insn,
2760 uint64_t Address, const void *Decoder) {
2761 DecodeStatus S = MCDisassembler::Success;
2762 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2763 unsigned add = fieldFromInstruction32(Insn, 4, 1);
2765 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2766 return MCDisassembler::Fail;
2767 Inst.addOperand(MCOperand::CreateImm(add));
2772 static DecodeStatus DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Val,
2773 uint64_t Address, const void *Decoder) {
2774 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
2775 return MCDisassembler::Success;
2778 static DecodeStatus DecodeCoprocessor(llvm::MCInst &Inst, unsigned Val,
2779 uint64_t Address, const void *Decoder) {
2780 if (Val == 0xA || Val == 0xB)
2781 return MCDisassembler::Fail;
2783 Inst.addOperand(MCOperand::CreateImm(Val));
2784 return MCDisassembler::Success;
2788 DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Insn,
2789 uint64_t Address, const void *Decoder) {
2790 DecodeStatus S = MCDisassembler::Success;
2792 unsigned pred = fieldFromInstruction32(Insn, 22, 4);
2793 if (pred == 0xE || pred == 0xF) {
2794 unsigned opc = fieldFromInstruction32(Insn, 4, 28);
2797 return MCDisassembler::Fail;
2799 Inst.setOpcode(ARM::t2DSB);
2802 Inst.setOpcode(ARM::t2DMB);
2805 Inst.setOpcode(ARM::t2ISB);
2809 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
2810 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
2813 unsigned brtarget = fieldFromInstruction32(Insn, 0, 11) << 1;
2814 brtarget |= fieldFromInstruction32(Insn, 11, 1) << 19;
2815 brtarget |= fieldFromInstruction32(Insn, 13, 1) << 18;
2816 brtarget |= fieldFromInstruction32(Insn, 16, 6) << 12;
2817 brtarget |= fieldFromInstruction32(Insn, 26, 1) << 20;
2819 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
2820 return MCDisassembler::Fail;
2821 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2822 return MCDisassembler::Fail;
2827 // Decode a shifted immediate operand. These basically consist
2828 // of an 8-bit value, and a 4-bit directive that specifies either
2829 // a splat operation or a rotation.
2830 static DecodeStatus DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val,
2831 uint64_t Address, const void *Decoder) {
2832 unsigned ctrl = fieldFromInstruction32(Val, 10, 2);
2834 unsigned byte = fieldFromInstruction32(Val, 8, 2);
2835 unsigned imm = fieldFromInstruction32(Val, 0, 8);
2838 Inst.addOperand(MCOperand::CreateImm(imm));
2841 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
2844 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
2847 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
2852 unsigned unrot = fieldFromInstruction32(Val, 0, 7) | 0x80;
2853 unsigned rot = fieldFromInstruction32(Val, 7, 5);
2854 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
2855 Inst.addOperand(MCOperand::CreateImm(imm));
2858 return MCDisassembler::Success;
2862 DecodeThumbBCCTargetOperand(llvm::MCInst &Inst, unsigned Val,
2863 uint64_t Address, const void *Decoder){
2864 Inst.addOperand(MCOperand::CreateImm(Val << 1));
2865 return MCDisassembler::Success;
2868 static DecodeStatus DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
2869 uint64_t Address, const void *Decoder){
2870 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
2871 return MCDisassembler::Success;
2874 static DecodeStatus DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Val,
2875 uint64_t Address, const void *Decoder) {
2878 return MCDisassembler::Fail;
2890 Inst.addOperand(MCOperand::CreateImm(Val));
2891 return MCDisassembler::Success;
2894 static DecodeStatus DecodeMSRMask(llvm::MCInst &Inst, unsigned Val,
2895 uint64_t Address, const void *Decoder) {
2896 if (!Val) return MCDisassembler::Fail;
2897 Inst.addOperand(MCOperand::CreateImm(Val));
2898 return MCDisassembler::Success;
2901 static DecodeStatus DecodeDoubleRegLoad(llvm::MCInst &Inst, unsigned Insn,
2902 uint64_t Address, const void *Decoder) {
2903 DecodeStatus S = MCDisassembler::Success;
2905 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2906 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2907 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
2909 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
2911 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
2912 return MCDisassembler::Fail;
2913 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
2914 return MCDisassembler::Fail;
2915 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2916 return MCDisassembler::Fail;
2917 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2918 return MCDisassembler::Fail;
2924 static DecodeStatus DecodeDoubleRegStore(llvm::MCInst &Inst, unsigned Insn,
2925 uint64_t Address, const void *Decoder){
2926 DecodeStatus S = MCDisassembler::Success;
2928 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2929 unsigned Rt = fieldFromInstruction32(Insn, 0, 4);
2930 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2931 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
2933 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
2934 return MCDisassembler::Fail;
2936 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
2937 if (Rd == Rn || Rd == Rt || Rd == Rt+1) return MCDisassembler::Fail;
2939 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
2940 return MCDisassembler::Fail;
2941 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
2942 return MCDisassembler::Fail;
2943 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2944 return MCDisassembler::Fail;
2945 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2946 return MCDisassembler::Fail;
2951 static DecodeStatus DecodeLDRPreImm(llvm::MCInst &Inst, unsigned Insn,
2952 uint64_t Address, const void *Decoder) {
2953 DecodeStatus S = MCDisassembler::Success;
2955 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2956 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2957 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
2958 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
2959 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
2960 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
2962 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
2964 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
2965 return MCDisassembler::Fail;
2966 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2967 return MCDisassembler::Fail;
2968 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
2969 return MCDisassembler::Fail;
2970 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2971 return MCDisassembler::Fail;
2976 static DecodeStatus DecodeLDRPreReg(llvm::MCInst &Inst, unsigned Insn,
2977 uint64_t Address, const void *Decoder) {
2978 DecodeStatus S = MCDisassembler::Success;
2980 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2981 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2982 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
2983 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
2984 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
2985 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
2986 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2988 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
2989 if (Rm == 0xF) S = MCDisassembler::SoftFail;
2991 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
2992 return MCDisassembler::Fail;
2993 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2994 return MCDisassembler::Fail;
2995 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
2996 return MCDisassembler::Fail;
2997 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2998 return MCDisassembler::Fail;
3004 static DecodeStatus DecodeSTRPreImm(llvm::MCInst &Inst, unsigned Insn,
3005 uint64_t Address, const void *Decoder) {
3006 DecodeStatus S = MCDisassembler::Success;
3008 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3009 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3010 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3011 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3012 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3013 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3015 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3017 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3018 return MCDisassembler::Fail;
3019 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3020 return MCDisassembler::Fail;
3021 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3022 return MCDisassembler::Fail;
3023 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3024 return MCDisassembler::Fail;
3029 static DecodeStatus DecodeSTRPreReg(llvm::MCInst &Inst, unsigned Insn,
3030 uint64_t Address, const void *Decoder) {
3031 DecodeStatus S = MCDisassembler::Success;
3033 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3034 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3035 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3036 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3037 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3038 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3040 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3042 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3043 return MCDisassembler::Fail;
3044 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3045 return MCDisassembler::Fail;
3046 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3047 return MCDisassembler::Fail;
3048 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3049 return MCDisassembler::Fail;
3054 static DecodeStatus DecodeVLD1LN(llvm::MCInst &Inst, unsigned Insn,
3055 uint64_t Address, const void *Decoder) {
3056 DecodeStatus S = MCDisassembler::Success;
3058 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3059 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3060 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3061 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3062 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3068 return MCDisassembler::Fail;
3070 if (fieldFromInstruction32(Insn, 4, 1))
3071 return MCDisassembler::Fail; // UNDEFINED
3072 index = fieldFromInstruction32(Insn, 5, 3);
3075 if (fieldFromInstruction32(Insn, 5, 1))
3076 return MCDisassembler::Fail; // UNDEFINED
3077 index = fieldFromInstruction32(Insn, 6, 2);
3078 if (fieldFromInstruction32(Insn, 4, 1))
3082 if (fieldFromInstruction32(Insn, 6, 1))
3083 return MCDisassembler::Fail; // UNDEFINED
3084 index = fieldFromInstruction32(Insn, 7, 1);
3085 if (fieldFromInstruction32(Insn, 4, 2) != 0)
3089 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3090 return MCDisassembler::Fail;
3091 if (Rm != 0xF) { // Writeback
3092 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3093 return MCDisassembler::Fail;
3095 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3096 return MCDisassembler::Fail;
3097 Inst.addOperand(MCOperand::CreateImm(align));
3100 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3101 return MCDisassembler::Fail;
3103 Inst.addOperand(MCOperand::CreateReg(0));
3106 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3107 return MCDisassembler::Fail;
3108 Inst.addOperand(MCOperand::CreateImm(index));
3113 static DecodeStatus DecodeVST1LN(llvm::MCInst &Inst, unsigned Insn,
3114 uint64_t Address, const void *Decoder) {
3115 DecodeStatus S = MCDisassembler::Success;
3117 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3118 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3119 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3120 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3121 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3127 return MCDisassembler::Fail;
3129 if (fieldFromInstruction32(Insn, 4, 1))
3130 return MCDisassembler::Fail; // UNDEFINED
3131 index = fieldFromInstruction32(Insn, 5, 3);
3134 if (fieldFromInstruction32(Insn, 5, 1))
3135 return MCDisassembler::Fail; // UNDEFINED
3136 index = fieldFromInstruction32(Insn, 6, 2);
3137 if (fieldFromInstruction32(Insn, 4, 1))
3141 if (fieldFromInstruction32(Insn, 6, 1))
3142 return MCDisassembler::Fail; // UNDEFINED
3143 index = fieldFromInstruction32(Insn, 7, 1);
3144 if (fieldFromInstruction32(Insn, 4, 2) != 0)
3148 if (Rm != 0xF) { // Writeback
3149 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3150 return MCDisassembler::Fail;
3152 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3153 return MCDisassembler::Fail;
3154 Inst.addOperand(MCOperand::CreateImm(align));
3157 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3158 return MCDisassembler::Fail;
3160 Inst.addOperand(MCOperand::CreateReg(0));
3163 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3164 return MCDisassembler::Fail;
3165 Inst.addOperand(MCOperand::CreateImm(index));
3171 static DecodeStatus DecodeVLD2LN(llvm::MCInst &Inst, unsigned Insn,
3172 uint64_t Address, const void *Decoder) {
3173 DecodeStatus S = MCDisassembler::Success;
3175 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3176 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3177 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3178 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3179 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3186 return MCDisassembler::Fail;
3188 index = fieldFromInstruction32(Insn, 5, 3);
3189 if (fieldFromInstruction32(Insn, 4, 1))
3193 index = fieldFromInstruction32(Insn, 6, 2);
3194 if (fieldFromInstruction32(Insn, 4, 1))
3196 if (fieldFromInstruction32(Insn, 5, 1))
3200 if (fieldFromInstruction32(Insn, 5, 1))
3201 return MCDisassembler::Fail; // UNDEFINED
3202 index = fieldFromInstruction32(Insn, 7, 1);
3203 if (fieldFromInstruction32(Insn, 4, 1) != 0)
3205 if (fieldFromInstruction32(Insn, 6, 1))
3210 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3211 return MCDisassembler::Fail;
3212 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3213 return MCDisassembler::Fail;
3214 if (Rm != 0xF) { // Writeback
3215 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3216 return MCDisassembler::Fail;
3218 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3219 return MCDisassembler::Fail;
3220 Inst.addOperand(MCOperand::CreateImm(align));
3223 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3224 return MCDisassembler::Fail;
3226 Inst.addOperand(MCOperand::CreateReg(0));
3229 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3230 return MCDisassembler::Fail;
3231 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3232 return MCDisassembler::Fail;
3233 Inst.addOperand(MCOperand::CreateImm(index));
3238 static DecodeStatus DecodeVST2LN(llvm::MCInst &Inst, unsigned Insn,
3239 uint64_t Address, const void *Decoder) {
3240 DecodeStatus S = MCDisassembler::Success;
3242 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3243 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3244 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3245 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3246 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3253 return MCDisassembler::Fail;
3255 index = fieldFromInstruction32(Insn, 5, 3);
3256 if (fieldFromInstruction32(Insn, 4, 1))
3260 index = fieldFromInstruction32(Insn, 6, 2);
3261 if (fieldFromInstruction32(Insn, 4, 1))
3263 if (fieldFromInstruction32(Insn, 5, 1))
3267 if (fieldFromInstruction32(Insn, 5, 1))
3268 return MCDisassembler::Fail; // UNDEFINED
3269 index = fieldFromInstruction32(Insn, 7, 1);
3270 if (fieldFromInstruction32(Insn, 4, 1) != 0)
3272 if (fieldFromInstruction32(Insn, 6, 1))
3277 if (Rm != 0xF) { // Writeback
3278 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3279 return MCDisassembler::Fail;
3281 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3282 return MCDisassembler::Fail;
3283 Inst.addOperand(MCOperand::CreateImm(align));
3286 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3287 return MCDisassembler::Fail;
3289 Inst.addOperand(MCOperand::CreateReg(0));
3292 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3293 return MCDisassembler::Fail;
3294 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3295 return MCDisassembler::Fail;
3296 Inst.addOperand(MCOperand::CreateImm(index));
3302 static DecodeStatus DecodeVLD3LN(llvm::MCInst &Inst, unsigned Insn,
3303 uint64_t Address, const void *Decoder) {
3304 DecodeStatus S = MCDisassembler::Success;
3306 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3307 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3308 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3309 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3310 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3317 return MCDisassembler::Fail;
3319 if (fieldFromInstruction32(Insn, 4, 1))
3320 return MCDisassembler::Fail; // UNDEFINED
3321 index = fieldFromInstruction32(Insn, 5, 3);
3324 if (fieldFromInstruction32(Insn, 4, 1))
3325 return MCDisassembler::Fail; // UNDEFINED
3326 index = fieldFromInstruction32(Insn, 6, 2);
3327 if (fieldFromInstruction32(Insn, 5, 1))
3331 if (fieldFromInstruction32(Insn, 4, 2))
3332 return MCDisassembler::Fail; // UNDEFINED
3333 index = fieldFromInstruction32(Insn, 7, 1);
3334 if (fieldFromInstruction32(Insn, 6, 1))
3339 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3340 return MCDisassembler::Fail;
3341 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3342 return MCDisassembler::Fail;
3343 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3344 return MCDisassembler::Fail;
3346 if (Rm != 0xF) { // Writeback
3347 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3348 return MCDisassembler::Fail;
3350 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3351 return MCDisassembler::Fail;
3352 Inst.addOperand(MCOperand::CreateImm(align));
3355 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3356 return MCDisassembler::Fail;
3358 Inst.addOperand(MCOperand::CreateReg(0));
3361 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3362 return MCDisassembler::Fail;
3363 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3364 return MCDisassembler::Fail;
3365 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3366 return MCDisassembler::Fail;
3367 Inst.addOperand(MCOperand::CreateImm(index));
3372 static DecodeStatus DecodeVST3LN(llvm::MCInst &Inst, unsigned Insn,
3373 uint64_t Address, const void *Decoder) {
3374 DecodeStatus S = MCDisassembler::Success;
3376 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3377 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3378 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3379 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3380 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3387 return MCDisassembler::Fail;
3389 if (fieldFromInstruction32(Insn, 4, 1))
3390 return MCDisassembler::Fail; // UNDEFINED
3391 index = fieldFromInstruction32(Insn, 5, 3);
3394 if (fieldFromInstruction32(Insn, 4, 1))
3395 return MCDisassembler::Fail; // UNDEFINED
3396 index = fieldFromInstruction32(Insn, 6, 2);
3397 if (fieldFromInstruction32(Insn, 5, 1))
3401 if (fieldFromInstruction32(Insn, 4, 2))
3402 return MCDisassembler::Fail; // UNDEFINED
3403 index = fieldFromInstruction32(Insn, 7, 1);
3404 if (fieldFromInstruction32(Insn, 6, 1))
3409 if (Rm != 0xF) { // Writeback
3410 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3411 return MCDisassembler::Fail;
3413 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3414 return MCDisassembler::Fail;
3415 Inst.addOperand(MCOperand::CreateImm(align));
3418 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3419 return MCDisassembler::Fail;
3421 Inst.addOperand(MCOperand::CreateReg(0));
3424 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3425 return MCDisassembler::Fail;
3426 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3427 return MCDisassembler::Fail;
3428 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3429 return MCDisassembler::Fail;
3430 Inst.addOperand(MCOperand::CreateImm(index));
3436 static DecodeStatus DecodeVLD4LN(llvm::MCInst &Inst, unsigned Insn,
3437 uint64_t Address, const void *Decoder) {
3438 DecodeStatus S = MCDisassembler::Success;
3440 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3441 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3442 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3443 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3444 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3451 return MCDisassembler::Fail;
3453 if (fieldFromInstruction32(Insn, 4, 1))
3455 index = fieldFromInstruction32(Insn, 5, 3);
3458 if (fieldFromInstruction32(Insn, 4, 1))
3460 index = fieldFromInstruction32(Insn, 6, 2);
3461 if (fieldFromInstruction32(Insn, 5, 1))
3465 if (fieldFromInstruction32(Insn, 4, 2))
3466 align = 4 << fieldFromInstruction32(Insn, 4, 2);
3467 index = fieldFromInstruction32(Insn, 7, 1);
3468 if (fieldFromInstruction32(Insn, 6, 1))
3473 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3474 return MCDisassembler::Fail;
3475 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3476 return MCDisassembler::Fail;
3477 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3478 return MCDisassembler::Fail;
3479 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3480 return MCDisassembler::Fail;
3482 if (Rm != 0xF) { // Writeback
3483 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3484 return MCDisassembler::Fail;
3486 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3487 return MCDisassembler::Fail;
3488 Inst.addOperand(MCOperand::CreateImm(align));
3491 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3492 return MCDisassembler::Fail;
3494 Inst.addOperand(MCOperand::CreateReg(0));
3497 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3498 return MCDisassembler::Fail;
3499 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3500 return MCDisassembler::Fail;
3501 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3502 return MCDisassembler::Fail;
3503 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3504 return MCDisassembler::Fail;
3505 Inst.addOperand(MCOperand::CreateImm(index));
3510 static DecodeStatus DecodeVST4LN(llvm::MCInst &Inst, unsigned Insn,
3511 uint64_t Address, const void *Decoder) {
3512 DecodeStatus S = MCDisassembler::Success;
3514 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3515 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3516 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3517 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3518 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3525 return MCDisassembler::Fail;
3527 if (fieldFromInstruction32(Insn, 4, 1))
3529 index = fieldFromInstruction32(Insn, 5, 3);
3532 if (fieldFromInstruction32(Insn, 4, 1))
3534 index = fieldFromInstruction32(Insn, 6, 2);
3535 if (fieldFromInstruction32(Insn, 5, 1))
3539 if (fieldFromInstruction32(Insn, 4, 2))
3540 align = 4 << fieldFromInstruction32(Insn, 4, 2);
3541 index = fieldFromInstruction32(Insn, 7, 1);
3542 if (fieldFromInstruction32(Insn, 6, 1))
3547 if (Rm != 0xF) { // Writeback
3548 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3549 return MCDisassembler::Fail;
3551 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3552 return MCDisassembler::Fail;
3553 Inst.addOperand(MCOperand::CreateImm(align));
3556 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3557 return MCDisassembler::Fail;
3559 Inst.addOperand(MCOperand::CreateReg(0));
3562 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3563 return MCDisassembler::Fail;
3564 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3565 return MCDisassembler::Fail;
3566 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3567 return MCDisassembler::Fail;
3568 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3569 return MCDisassembler::Fail;
3570 Inst.addOperand(MCOperand::CreateImm(index));
3575 static DecodeStatus DecodeVMOVSRR(llvm::MCInst &Inst, unsigned Insn,
3576 uint64_t Address, const void *Decoder) {
3577 DecodeStatus S = MCDisassembler::Success;
3578 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3579 unsigned Rt2 = fieldFromInstruction32(Insn, 16, 4);
3580 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3581 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3582 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
3584 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
3585 S = MCDisassembler::SoftFail;
3587 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
3588 return MCDisassembler::Fail;
3589 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
3590 return MCDisassembler::Fail;
3591 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
3592 return MCDisassembler::Fail;
3593 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
3594 return MCDisassembler::Fail;
3595 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3596 return MCDisassembler::Fail;
3601 static DecodeStatus DecodeVMOVRRS(llvm::MCInst &Inst, unsigned Insn,
3602 uint64_t Address, const void *Decoder) {
3603 DecodeStatus S = MCDisassembler::Success;
3604 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3605 unsigned Rt2 = fieldFromInstruction32(Insn, 16, 4);
3606 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3607 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3608 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
3610 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
3611 S = MCDisassembler::SoftFail;
3613 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
3614 return MCDisassembler::Fail;
3615 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
3616 return MCDisassembler::Fail;
3617 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
3618 return MCDisassembler::Fail;
3619 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
3620 return MCDisassembler::Fail;
3621 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3622 return MCDisassembler::Fail;
3627 static DecodeStatus DecodeIT(llvm::MCInst &Inst, unsigned Insn,
3628 uint64_t Address, const void *Decoder) {
3629 DecodeStatus S = MCDisassembler::Success;
3630 unsigned pred = fieldFromInstruction16(Insn, 4, 4);
3631 // The InstPrinter needs to have the low bit of the predicate in
3632 // the mask operand to be able to print it properly.
3633 unsigned mask = fieldFromInstruction16(Insn, 0, 5);
3637 S = MCDisassembler::SoftFail;
3640 if ((mask & 0xF) == 0) {
3641 // Preserve the high bit of the mask, which is the low bit of
3645 S = MCDisassembler::SoftFail;
3648 Inst.addOperand(MCOperand::CreateImm(pred));
3649 Inst.addOperand(MCOperand::CreateImm(mask));