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 DecodeStatus 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 DecodeT2AddrModeImm0_1020s4(llvm::MCInst &Inst,unsigned Val,
273 uint64_t Address, const void *Decoder);
274 static DecodeStatus DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
275 uint64_t Address, const void *Decoder);
276 static DecodeStatus DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val,
277 uint64_t Address, const void *Decoder);
278 static DecodeStatus DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Val,
279 uint64_t Address, const void *Decoder);
280 static DecodeStatus DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn,
281 uint64_t Address, const void *Decoder);
282 static DecodeStatus DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn,
283 uint64_t Address, const void *Decoder);
284 static DecodeStatus DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Insn,
285 uint64_t Address, const void *Decoder);
286 static DecodeStatus DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val,
287 uint64_t Address, const void *Decoder);
288 static DecodeStatus DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Val,
289 uint64_t Address, const void *Decoder);
290 static DecodeStatus DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val,
291 uint64_t Address, const void *Decoder);
292 static DecodeStatus DecodeThumbBCCTargetOperand(llvm::MCInst &Inst,unsigned Val,
293 uint64_t Address, const void *Decoder);
294 static DecodeStatus DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
295 uint64_t Address, const void *Decoder);
296 static DecodeStatus DecodeIT(llvm::MCInst &Inst, unsigned Val,
297 uint64_t Address, const void *Decoder);
298 static DecodeStatus DecodeT2LDRDPreInstruction(llvm::MCInst &Inst,unsigned Insn,
299 uint64_t Address, const void *Decoder);
300 static DecodeStatus DecodeT2STRDPreInstruction(llvm::MCInst &Inst,unsigned Insn,
301 uint64_t Address, const void *Decoder);
303 #include "ARMGenDisassemblerTables.inc"
304 #include "ARMGenInstrInfo.inc"
305 #include "ARMGenEDInfo.inc"
307 static MCDisassembler *createARMDisassembler(const Target &T, const MCSubtargetInfo &STI) {
308 return new ARMDisassembler(STI);
311 static MCDisassembler *createThumbDisassembler(const Target &T, const MCSubtargetInfo &STI) {
312 return new ThumbDisassembler(STI);
315 EDInstInfo *ARMDisassembler::getEDInfo() const {
319 EDInstInfo *ThumbDisassembler::getEDInfo() const {
323 DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
324 const MemoryObject &Region,
326 raw_ostream &os) const {
329 assert(!(STI.getFeatureBits() & ARM::ModeThumb) &&
330 "Asked to disassemble an ARM instruction but Subtarget is in Thumb mode!");
332 // We want to read exactly 4 bytes of data.
333 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
335 return MCDisassembler::Fail;
338 // Encoded as a small-endian 32-bit word in the stream.
339 uint32_t insn = (bytes[3] << 24) |
344 // Calling the auto-generated decoder function.
345 DecodeStatus result = decodeARMInstruction32(MI, insn, Address, this, STI);
346 if (result != MCDisassembler::Fail) {
351 // VFP and NEON instructions, similarly, are shared between ARM
354 result = decodeVFPInstruction32(MI, insn, Address, this, STI);
355 if (result != MCDisassembler::Fail) {
361 result = decodeNEONDataInstruction32(MI, insn, Address, this, STI);
362 if (result != MCDisassembler::Fail) {
364 // Add a fake predicate operand, because we share these instruction
365 // definitions with Thumb2 where these instructions are predicable.
366 if (!DecodePredicateOperand(MI, 0xE, Address, this))
367 return MCDisassembler::Fail;
372 result = decodeNEONLoadStoreInstruction32(MI, insn, Address, this, STI);
373 if (result != MCDisassembler::Fail) {
375 // Add a fake predicate operand, because we share these instruction
376 // definitions with Thumb2 where these instructions are predicable.
377 if (!DecodePredicateOperand(MI, 0xE, Address, this))
378 return MCDisassembler::Fail;
383 result = decodeNEONDupInstruction32(MI, insn, Address, this, STI);
384 if (result != MCDisassembler::Fail) {
386 // Add a fake predicate operand, because we share these instruction
387 // definitions with Thumb2 where these instructions are predicable.
388 if (!DecodePredicateOperand(MI, 0xE, Address, this))
389 return MCDisassembler::Fail;
396 return MCDisassembler::Fail;
400 extern MCInstrDesc ARMInsts[];
403 // Thumb1 instructions don't have explicit S bits. Rather, they
404 // implicitly set CPSR. Since it's not represented in the encoding, the
405 // auto-generated decoder won't inject the CPSR operand. We need to fix
406 // that as a post-pass.
407 static void AddThumb1SBit(MCInst &MI, bool InITBlock) {
408 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
409 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
410 MCInst::iterator I = MI.begin();
411 for (unsigned i = 0; i < NumOps; ++i, ++I) {
412 if (I == MI.end()) break;
413 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) {
414 if (i > 0 && OpInfo[i-1].isPredicate()) continue;
415 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
420 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
423 // Most Thumb instructions don't have explicit predicates in the
424 // encoding, but rather get their predicates from IT context. We need
425 // to fix up the predicate operands using this context information as a
427 MCDisassembler::DecodeStatus
428 ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
429 MCDisassembler::DecodeStatus S = Success;
431 // A few instructions actually have predicates encoded in them. Don't
432 // try to overwrite it if we're seeing one of those.
433 switch (MI.getOpcode()) {
438 // Some instructions (mostly conditional branches) are not
439 // allowed in IT blocks.
440 if (!ITBlock.empty())
447 // Some instructions (mostly unconditional branches) can
448 // only appears at the end of, or outside of, an IT.
449 if (ITBlock.size() > 1)
456 // If we're in an IT block, base the predicate on that. Otherwise,
457 // assume a predicate of AL.
459 if (!ITBlock.empty()) {
467 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
468 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
469 MCInst::iterator I = MI.begin();
470 for (unsigned i = 0; i < NumOps; ++i, ++I) {
471 if (I == MI.end()) break;
472 if (OpInfo[i].isPredicate()) {
473 I = MI.insert(I, MCOperand::CreateImm(CC));
476 MI.insert(I, MCOperand::CreateReg(0));
478 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
483 I = MI.insert(I, MCOperand::CreateImm(CC));
486 MI.insert(I, MCOperand::CreateReg(0));
488 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
493 // Thumb VFP instructions are a special case. Because we share their
494 // encodings between ARM and Thumb modes, and they are predicable in ARM
495 // mode, the auto-generated decoder will give them an (incorrect)
496 // predicate operand. We need to rewrite these operands based on the IT
497 // context as a post-pass.
498 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
500 if (!ITBlock.empty()) {
506 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
507 MCInst::iterator I = MI.begin();
508 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
509 for (unsigned i = 0; i < NumOps; ++i, ++I) {
510 if (OpInfo[i].isPredicate() ) {
516 I->setReg(ARM::CPSR);
522 DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
523 const MemoryObject &Region,
525 raw_ostream &os) const {
528 assert((STI.getFeatureBits() & ARM::ModeThumb) &&
529 "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!");
531 // We want to read exactly 2 bytes of data.
532 if (Region.readBytes(Address, 2, (uint8_t*)bytes, NULL) == -1) {
534 return MCDisassembler::Fail;
537 uint16_t insn16 = (bytes[1] << 8) | bytes[0];
538 DecodeStatus result = decodeThumbInstruction16(MI, insn16, Address, this, STI);
539 if (result != MCDisassembler::Fail) {
541 Check(result, AddThumbPredicate(MI));
546 result = decodeThumbSBitInstruction16(MI, insn16, Address, this, STI);
549 bool InITBlock = !ITBlock.empty();
550 Check(result, AddThumbPredicate(MI));
551 AddThumb1SBit(MI, InITBlock);
556 result = decodeThumb2Instruction16(MI, insn16, Address, this, STI);
557 if (result != MCDisassembler::Fail) {
559 Check(result, AddThumbPredicate(MI));
561 // If we find an IT instruction, we need to parse its condition
562 // code and mask operands so that we can apply them correctly
563 // to the subsequent instructions.
564 if (MI.getOpcode() == ARM::t2IT) {
565 // (3 - the number of trailing zeros) is the number of then / else.
566 unsigned firstcond = MI.getOperand(0).getImm();
567 unsigned Mask = MI.getOperand(1).getImm();
568 unsigned CondBit0 = Mask >> 4 & 1;
569 unsigned NumTZ = CountTrailingZeros_32(Mask);
570 assert(NumTZ <= 3 && "Invalid IT mask!");
571 for (unsigned Pos = 3, e = NumTZ; Pos > e; --Pos) {
572 bool T = ((Mask >> Pos) & 1) == CondBit0;
574 ITBlock.insert(ITBlock.begin(), firstcond);
576 ITBlock.insert(ITBlock.begin(), firstcond ^ 1);
579 ITBlock.push_back(firstcond);
585 // We want to read exactly 4 bytes of data.
586 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
588 return MCDisassembler::Fail;
591 uint32_t insn32 = (bytes[3] << 8) |
596 result = decodeThumbInstruction32(MI, insn32, Address, this, STI);
597 if (result != MCDisassembler::Fail) {
599 bool InITBlock = ITBlock.size();
600 Check(result, AddThumbPredicate(MI));
601 AddThumb1SBit(MI, InITBlock);
606 result = decodeThumb2Instruction32(MI, insn32, Address, this, STI);
607 if (result != MCDisassembler::Fail) {
609 Check(result, AddThumbPredicate(MI));
614 result = decodeVFPInstruction32(MI, insn32, Address, this, STI);
615 if (result != MCDisassembler::Fail) {
617 UpdateThumbVFPPredicate(MI);
622 result = decodeNEONDupInstruction32(MI, insn32, Address, this, STI);
623 if (result != MCDisassembler::Fail) {
625 Check(result, AddThumbPredicate(MI));
629 if (fieldFromInstruction32(insn32, 24, 8) == 0xF9) {
631 uint32_t NEONLdStInsn = insn32;
632 NEONLdStInsn &= 0xF0FFFFFF;
633 NEONLdStInsn |= 0x04000000;
634 result = decodeNEONLoadStoreInstruction32(MI, NEONLdStInsn, Address, this, STI);
635 if (result != MCDisassembler::Fail) {
637 Check(result, AddThumbPredicate(MI));
642 if (fieldFromInstruction32(insn32, 24, 4) == 0xF) {
644 uint32_t NEONDataInsn = insn32;
645 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
646 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
647 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
648 result = decodeNEONDataInstruction32(MI, NEONDataInsn, Address, this, STI);
649 if (result != MCDisassembler::Fail) {
651 Check(result, AddThumbPredicate(MI));
657 return MCDisassembler::Fail;
661 extern "C" void LLVMInitializeARMDisassembler() {
662 TargetRegistry::RegisterMCDisassembler(TheARMTarget,
663 createARMDisassembler);
664 TargetRegistry::RegisterMCDisassembler(TheThumbTarget,
665 createThumbDisassembler);
668 static const unsigned GPRDecoderTable[] = {
669 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
670 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
671 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
672 ARM::R12, ARM::SP, ARM::LR, ARM::PC
675 static DecodeStatus DecodeGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
676 uint64_t Address, const void *Decoder) {
678 return MCDisassembler::Fail;
680 unsigned Register = GPRDecoderTable[RegNo];
681 Inst.addOperand(MCOperand::CreateReg(Register));
682 return MCDisassembler::Success;
686 DecodeGPRnopcRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
687 uint64_t Address, const void *Decoder) {
688 if (RegNo == 15) return MCDisassembler::Fail;
689 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
692 static DecodeStatus DecodetGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
693 uint64_t Address, const void *Decoder) {
695 return MCDisassembler::Fail;
696 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
699 static DecodeStatus DecodetcGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
700 uint64_t Address, const void *Decoder) {
701 unsigned Register = 0;
722 return MCDisassembler::Fail;
725 Inst.addOperand(MCOperand::CreateReg(Register));
726 return MCDisassembler::Success;
729 static DecodeStatus DecoderGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
730 uint64_t Address, const void *Decoder) {
731 if (RegNo == 13 || RegNo == 15) return MCDisassembler::Fail;
732 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
735 static const unsigned SPRDecoderTable[] = {
736 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
737 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
738 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
739 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
740 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
741 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
742 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
743 ARM::S28, ARM::S29, ARM::S30, ARM::S31
746 static DecodeStatus DecodeSPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
747 uint64_t Address, const void *Decoder) {
749 return MCDisassembler::Fail;
751 unsigned Register = SPRDecoderTable[RegNo];
752 Inst.addOperand(MCOperand::CreateReg(Register));
753 return MCDisassembler::Success;
756 static const unsigned DPRDecoderTable[] = {
757 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
758 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
759 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
760 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
761 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
762 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
763 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
764 ARM::D28, ARM::D29, ARM::D30, ARM::D31
767 static DecodeStatus DecodeDPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
768 uint64_t Address, const void *Decoder) {
770 return MCDisassembler::Fail;
772 unsigned Register = DPRDecoderTable[RegNo];
773 Inst.addOperand(MCOperand::CreateReg(Register));
774 return MCDisassembler::Success;
777 static DecodeStatus DecodeDPR_8RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
778 uint64_t Address, const void *Decoder) {
780 return MCDisassembler::Fail;
781 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
785 DecodeDPR_VFP2RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
786 uint64_t Address, const void *Decoder) {
788 return MCDisassembler::Fail;
789 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
792 static const unsigned QPRDecoderTable[] = {
793 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
794 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
795 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
796 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
800 static DecodeStatus DecodeQPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
801 uint64_t Address, const void *Decoder) {
803 return MCDisassembler::Fail;
806 unsigned Register = QPRDecoderTable[RegNo];
807 Inst.addOperand(MCOperand::CreateReg(Register));
808 return MCDisassembler::Success;
811 static DecodeStatus DecodePredicateOperand(llvm::MCInst &Inst, unsigned Val,
812 uint64_t Address, const void *Decoder) {
813 if (Val == 0xF) return MCDisassembler::Fail;
814 // AL predicate is not allowed on Thumb1 branches.
815 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
816 return MCDisassembler::Fail;
817 Inst.addOperand(MCOperand::CreateImm(Val));
818 if (Val == ARMCC::AL) {
819 Inst.addOperand(MCOperand::CreateReg(0));
821 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
822 return MCDisassembler::Success;
825 static DecodeStatus DecodeCCOutOperand(llvm::MCInst &Inst, unsigned Val,
826 uint64_t Address, const void *Decoder) {
828 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
830 Inst.addOperand(MCOperand::CreateReg(0));
831 return MCDisassembler::Success;
834 static DecodeStatus DecodeSOImmOperand(llvm::MCInst &Inst, unsigned Val,
835 uint64_t Address, const void *Decoder) {
836 uint32_t imm = Val & 0xFF;
837 uint32_t rot = (Val & 0xF00) >> 7;
838 uint32_t rot_imm = (imm >> rot) | (imm << (32-rot));
839 Inst.addOperand(MCOperand::CreateImm(rot_imm));
840 return MCDisassembler::Success;
843 static DecodeStatus DecodeSORegImmOperand(llvm::MCInst &Inst, unsigned Val,
844 uint64_t Address, const void *Decoder) {
845 DecodeStatus S = MCDisassembler::Success;
847 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
848 unsigned type = fieldFromInstruction32(Val, 5, 2);
849 unsigned imm = fieldFromInstruction32(Val, 7, 5);
851 // Register-immediate
852 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
853 return MCDisassembler::Fail;
855 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
871 if (Shift == ARM_AM::ror && imm == 0)
874 unsigned Op = Shift | (imm << 3);
875 Inst.addOperand(MCOperand::CreateImm(Op));
880 static DecodeStatus DecodeSORegRegOperand(llvm::MCInst &Inst, unsigned Val,
881 uint64_t Address, const void *Decoder) {
882 DecodeStatus S = MCDisassembler::Success;
884 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
885 unsigned type = fieldFromInstruction32(Val, 5, 2);
886 unsigned Rs = fieldFromInstruction32(Val, 8, 4);
889 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
890 return MCDisassembler::Fail;
891 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)))
892 return MCDisassembler::Fail;
894 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
910 Inst.addOperand(MCOperand::CreateImm(Shift));
915 static DecodeStatus DecodeRegListOperand(llvm::MCInst &Inst, unsigned Val,
916 uint64_t Address, const void *Decoder) {
917 DecodeStatus S = MCDisassembler::Success;
919 // Empty register lists are not allowed.
920 if (CountPopulation_32(Val) == 0) return MCDisassembler::Fail;
921 for (unsigned i = 0; i < 16; ++i) {
922 if (Val & (1 << i)) {
923 if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder)))
924 return MCDisassembler::Fail;
931 static DecodeStatus DecodeSPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
932 uint64_t Address, const void *Decoder) {
933 DecodeStatus S = MCDisassembler::Success;
935 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
936 unsigned regs = Val & 0xFF;
938 if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
939 return MCDisassembler::Fail;
940 for (unsigned i = 0; i < (regs - 1); ++i) {
941 if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)))
942 return MCDisassembler::Fail;
948 static DecodeStatus DecodeDPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
949 uint64_t Address, const void *Decoder) {
950 DecodeStatus S = MCDisassembler::Success;
952 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
953 unsigned regs = (Val & 0xFF) / 2;
955 if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
956 return MCDisassembler::Fail;
957 for (unsigned i = 0; i < (regs - 1); ++i) {
958 if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)))
959 return MCDisassembler::Fail;
965 static DecodeStatus DecodeBitfieldMaskOperand(llvm::MCInst &Inst, unsigned Val,
966 uint64_t Address, const void *Decoder) {
967 // This operand encodes a mask of contiguous zeros between a specified MSB
968 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
969 // the mask of all bits LSB-and-lower, and then xor them to create
970 // the mask of that's all ones on [msb, lsb]. Finally we not it to
971 // create the final mask.
972 unsigned msb = fieldFromInstruction32(Val, 5, 5);
973 unsigned lsb = fieldFromInstruction32(Val, 0, 5);
974 uint32_t msb_mask = (1 << (msb+1)) - 1;
975 uint32_t lsb_mask = (1 << lsb) - 1;
976 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
977 return MCDisassembler::Success;
980 static DecodeStatus DecodeCopMemInstruction(llvm::MCInst &Inst, unsigned Insn,
981 uint64_t Address, const void *Decoder) {
982 DecodeStatus S = MCDisassembler::Success;
984 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
985 unsigned CRd = fieldFromInstruction32(Insn, 12, 4);
986 unsigned coproc = fieldFromInstruction32(Insn, 8, 4);
987 unsigned imm = fieldFromInstruction32(Insn, 0, 8);
988 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
989 unsigned U = fieldFromInstruction32(Insn, 23, 1);
991 switch (Inst.getOpcode()) {
992 case ARM::LDC_OFFSET:
995 case ARM::LDC_OPTION:
996 case ARM::LDCL_OFFSET:
999 case ARM::LDCL_OPTION:
1000 case ARM::STC_OFFSET:
1003 case ARM::STC_OPTION:
1004 case ARM::STCL_OFFSET:
1006 case ARM::STCL_POST:
1007 case ARM::STCL_OPTION:
1008 case ARM::t2LDC_OFFSET:
1009 case ARM::t2LDC_PRE:
1010 case ARM::t2LDC_POST:
1011 case ARM::t2LDC_OPTION:
1012 case ARM::t2LDCL_OFFSET:
1013 case ARM::t2LDCL_PRE:
1014 case ARM::t2LDCL_POST:
1015 case ARM::t2LDCL_OPTION:
1016 case ARM::t2STC_OFFSET:
1017 case ARM::t2STC_PRE:
1018 case ARM::t2STC_POST:
1019 case ARM::t2STC_OPTION:
1020 case ARM::t2STCL_OFFSET:
1021 case ARM::t2STCL_PRE:
1022 case ARM::t2STCL_POST:
1023 case ARM::t2STCL_OPTION:
1024 if (coproc == 0xA || coproc == 0xB)
1025 return MCDisassembler::Fail;
1031 Inst.addOperand(MCOperand::CreateImm(coproc));
1032 Inst.addOperand(MCOperand::CreateImm(CRd));
1033 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1034 return MCDisassembler::Fail;
1035 switch (Inst.getOpcode()) {
1036 case ARM::LDC_OPTION:
1037 case ARM::LDCL_OPTION:
1038 case ARM::LDC2_OPTION:
1039 case ARM::LDC2L_OPTION:
1040 case ARM::STC_OPTION:
1041 case ARM::STCL_OPTION:
1042 case ARM::STC2_OPTION:
1043 case ARM::STC2L_OPTION:
1044 case ARM::LDCL_POST:
1045 case ARM::STCL_POST:
1046 case ARM::LDC2L_POST:
1047 case ARM::STC2L_POST:
1048 case ARM::t2LDC_OPTION:
1049 case ARM::t2LDCL_OPTION:
1050 case ARM::t2STC_OPTION:
1051 case ARM::t2STCL_OPTION:
1052 case ARM::t2LDCL_POST:
1053 case ARM::t2STCL_POST:
1056 Inst.addOperand(MCOperand::CreateReg(0));
1060 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1061 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1063 bool writeback = (P == 0) || (W == 1);
1064 unsigned idx_mode = 0;
1066 idx_mode = ARMII::IndexModePre;
1067 else if (!P && writeback)
1068 idx_mode = ARMII::IndexModePost;
1070 switch (Inst.getOpcode()) {
1071 case ARM::LDCL_POST:
1072 case ARM::STCL_POST:
1073 case ARM::t2LDCL_POST:
1074 case ARM::t2STCL_POST:
1075 case ARM::LDC2L_POST:
1076 case ARM::STC2L_POST:
1078 case ARM::LDC_OPTION:
1079 case ARM::LDCL_OPTION:
1080 case ARM::LDC2_OPTION:
1081 case ARM::LDC2L_OPTION:
1082 case ARM::STC_OPTION:
1083 case ARM::STCL_OPTION:
1084 case ARM::STC2_OPTION:
1085 case ARM::STC2L_OPTION:
1086 case ARM::t2LDC_OPTION:
1087 case ARM::t2LDCL_OPTION:
1088 case ARM::t2STC_OPTION:
1089 case ARM::t2STCL_OPTION:
1090 Inst.addOperand(MCOperand::CreateImm(imm));
1094 Inst.addOperand(MCOperand::CreateImm(
1095 ARM_AM::getAM2Opc(ARM_AM::add, imm, ARM_AM::lsl, idx_mode)));
1097 Inst.addOperand(MCOperand::CreateImm(
1098 ARM_AM::getAM2Opc(ARM_AM::sub, imm, ARM_AM::lsl, idx_mode)));
1102 switch (Inst.getOpcode()) {
1103 case ARM::LDC_OFFSET:
1106 case ARM::LDC_OPTION:
1107 case ARM::LDCL_OFFSET:
1109 case ARM::LDCL_POST:
1110 case ARM::LDCL_OPTION:
1111 case ARM::STC_OFFSET:
1114 case ARM::STC_OPTION:
1115 case ARM::STCL_OFFSET:
1117 case ARM::STCL_POST:
1118 case ARM::STCL_OPTION:
1119 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1120 return MCDisassembler::Fail;
1130 DecodeAddrMode2IdxInstruction(llvm::MCInst &Inst, unsigned Insn,
1131 uint64_t Address, const void *Decoder) {
1132 DecodeStatus S = MCDisassembler::Success;
1134 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1135 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1136 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1137 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
1138 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1139 unsigned reg = fieldFromInstruction32(Insn, 25, 1);
1140 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1141 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1143 // On stores, the writeback operand precedes Rt.
1144 switch (Inst.getOpcode()) {
1145 case ARM::STR_POST_IMM:
1146 case ARM::STR_POST_REG:
1147 case ARM::STRB_POST_IMM:
1148 case ARM::STRB_POST_REG:
1149 case ARM::STRT_POST_REG:
1150 case ARM::STRT_POST_IMM:
1151 case ARM::STRBT_POST_REG:
1152 case ARM::STRBT_POST_IMM:
1153 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1154 return MCDisassembler::Fail;
1160 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1161 return MCDisassembler::Fail;
1163 // On loads, the writeback operand comes after Rt.
1164 switch (Inst.getOpcode()) {
1165 case ARM::LDR_POST_IMM:
1166 case ARM::LDR_POST_REG:
1167 case ARM::LDRB_POST_IMM:
1168 case ARM::LDRB_POST_REG:
1169 case ARM::LDRBT_POST_REG:
1170 case ARM::LDRBT_POST_IMM:
1171 case ARM::LDRT_POST_REG:
1172 case ARM::LDRT_POST_IMM:
1173 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1174 return MCDisassembler::Fail;
1180 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1181 return MCDisassembler::Fail;
1183 ARM_AM::AddrOpc Op = ARM_AM::add;
1184 if (!fieldFromInstruction32(Insn, 23, 1))
1187 bool writeback = (P == 0) || (W == 1);
1188 unsigned idx_mode = 0;
1190 idx_mode = ARMII::IndexModePre;
1191 else if (!P && writeback)
1192 idx_mode = ARMII::IndexModePost;
1194 if (writeback && (Rn == 15 || Rn == Rt))
1195 S = MCDisassembler::SoftFail; // UNPREDICTABLE
1198 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1199 return MCDisassembler::Fail;
1200 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1201 switch( fieldFromInstruction32(Insn, 5, 2)) {
1215 return MCDisassembler::Fail;
1217 unsigned amt = fieldFromInstruction32(Insn, 7, 5);
1218 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1220 Inst.addOperand(MCOperand::CreateImm(imm));
1222 Inst.addOperand(MCOperand::CreateReg(0));
1223 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1224 Inst.addOperand(MCOperand::CreateImm(tmp));
1227 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1228 return MCDisassembler::Fail;
1233 static DecodeStatus DecodeSORegMemOperand(llvm::MCInst &Inst, unsigned Val,
1234 uint64_t Address, const void *Decoder) {
1235 DecodeStatus S = MCDisassembler::Success;
1237 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1238 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1239 unsigned type = fieldFromInstruction32(Val, 5, 2);
1240 unsigned imm = fieldFromInstruction32(Val, 7, 5);
1241 unsigned U = fieldFromInstruction32(Val, 12, 1);
1243 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1259 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1260 return MCDisassembler::Fail;
1261 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1262 return MCDisassembler::Fail;
1265 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1267 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1268 Inst.addOperand(MCOperand::CreateImm(shift));
1274 DecodeAddrMode3Instruction(llvm::MCInst &Inst, unsigned Insn,
1275 uint64_t Address, const void *Decoder) {
1276 DecodeStatus S = MCDisassembler::Success;
1278 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1279 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1280 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1281 unsigned type = fieldFromInstruction32(Insn, 22, 1);
1282 unsigned imm = fieldFromInstruction32(Insn, 8, 4);
1283 unsigned U = ((~fieldFromInstruction32(Insn, 23, 1)) & 1) << 8;
1284 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1285 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1286 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1288 bool writeback = (W == 1) | (P == 0);
1290 // For {LD,ST}RD, Rt must be even, else undefined.
1291 switch (Inst.getOpcode()) {
1294 case ARM::STRD_POST:
1297 case ARM::LDRD_POST:
1298 if (Rt & 0x1) return MCDisassembler::Fail;
1304 if (writeback) { // Writeback
1306 U |= ARMII::IndexModePre << 9;
1308 U |= ARMII::IndexModePost << 9;
1310 // On stores, the writeback operand precedes Rt.
1311 switch (Inst.getOpcode()) {
1314 case ARM::STRD_POST:
1317 case ARM::STRH_POST:
1318 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1319 return MCDisassembler::Fail;
1326 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
1327 return MCDisassembler::Fail;
1328 switch (Inst.getOpcode()) {
1331 case ARM::STRD_POST:
1334 case ARM::LDRD_POST:
1335 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
1336 return MCDisassembler::Fail;
1343 // On loads, the writeback operand comes after Rt.
1344 switch (Inst.getOpcode()) {
1347 case ARM::LDRD_POST:
1350 case ARM::LDRH_POST:
1352 case ARM::LDRSH_PRE:
1353 case ARM::LDRSH_POST:
1355 case ARM::LDRSB_PRE:
1356 case ARM::LDRSB_POST:
1359 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1360 return MCDisassembler::Fail;
1367 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1368 return MCDisassembler::Fail;
1371 Inst.addOperand(MCOperand::CreateReg(0));
1372 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1374 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1375 return MCDisassembler::Fail;
1376 Inst.addOperand(MCOperand::CreateImm(U));
1379 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1380 return MCDisassembler::Fail;
1385 static DecodeStatus DecodeRFEInstruction(llvm::MCInst &Inst, unsigned Insn,
1386 uint64_t Address, const void *Decoder) {
1387 DecodeStatus S = MCDisassembler::Success;
1389 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1390 unsigned mode = fieldFromInstruction32(Insn, 23, 2);
1407 Inst.addOperand(MCOperand::CreateImm(mode));
1408 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1409 return MCDisassembler::Fail;
1414 static DecodeStatus DecodeMemMultipleWritebackInstruction(llvm::MCInst &Inst,
1416 uint64_t Address, const void *Decoder) {
1417 DecodeStatus S = MCDisassembler::Success;
1419 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1420 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1421 unsigned reglist = fieldFromInstruction32(Insn, 0, 16);
1424 switch (Inst.getOpcode()) {
1426 Inst.setOpcode(ARM::RFEDA);
1428 case ARM::LDMDA_UPD:
1429 Inst.setOpcode(ARM::RFEDA_UPD);
1432 Inst.setOpcode(ARM::RFEDB);
1434 case ARM::LDMDB_UPD:
1435 Inst.setOpcode(ARM::RFEDB_UPD);
1438 Inst.setOpcode(ARM::RFEIA);
1440 case ARM::LDMIA_UPD:
1441 Inst.setOpcode(ARM::RFEIA_UPD);
1444 Inst.setOpcode(ARM::RFEIB);
1446 case ARM::LDMIB_UPD:
1447 Inst.setOpcode(ARM::RFEIB_UPD);
1450 Inst.setOpcode(ARM::SRSDA);
1452 case ARM::STMDA_UPD:
1453 Inst.setOpcode(ARM::SRSDA_UPD);
1456 Inst.setOpcode(ARM::SRSDB);
1458 case ARM::STMDB_UPD:
1459 Inst.setOpcode(ARM::SRSDB_UPD);
1462 Inst.setOpcode(ARM::SRSIA);
1464 case ARM::STMIA_UPD:
1465 Inst.setOpcode(ARM::SRSIA_UPD);
1468 Inst.setOpcode(ARM::SRSIB);
1470 case ARM::STMIB_UPD:
1471 Inst.setOpcode(ARM::SRSIB_UPD);
1474 if (!Check(S, MCDisassembler::Fail)) return MCDisassembler::Fail;
1477 // For stores (which become SRS's, the only operand is the mode.
1478 if (fieldFromInstruction32(Insn, 20, 1) == 0) {
1480 MCOperand::CreateImm(fieldFromInstruction32(Insn, 0, 4)));
1484 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1487 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1488 return MCDisassembler::Fail;
1489 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1490 return MCDisassembler::Fail; // Tied
1491 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1492 return MCDisassembler::Fail;
1493 if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
1494 return MCDisassembler::Fail;
1499 static DecodeStatus DecodeCPSInstruction(llvm::MCInst &Inst, unsigned Insn,
1500 uint64_t Address, const void *Decoder) {
1501 unsigned imod = fieldFromInstruction32(Insn, 18, 2);
1502 unsigned M = fieldFromInstruction32(Insn, 17, 1);
1503 unsigned iflags = fieldFromInstruction32(Insn, 6, 3);
1504 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1506 DecodeStatus S = MCDisassembler::Success;
1508 // imod == '01' --> UNPREDICTABLE
1509 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1510 // return failure here. The '01' imod value is unprintable, so there's
1511 // nothing useful we could do even if we returned UNPREDICTABLE.
1513 if (imod == 1) return MCDisassembler::Fail;
1516 Inst.setOpcode(ARM::CPS3p);
1517 Inst.addOperand(MCOperand::CreateImm(imod));
1518 Inst.addOperand(MCOperand::CreateImm(iflags));
1519 Inst.addOperand(MCOperand::CreateImm(mode));
1520 } else if (imod && !M) {
1521 Inst.setOpcode(ARM::CPS2p);
1522 Inst.addOperand(MCOperand::CreateImm(imod));
1523 Inst.addOperand(MCOperand::CreateImm(iflags));
1524 if (mode) S = MCDisassembler::SoftFail;
1525 } else if (!imod && M) {
1526 Inst.setOpcode(ARM::CPS1p);
1527 Inst.addOperand(MCOperand::CreateImm(mode));
1528 if (iflags) S = MCDisassembler::SoftFail;
1530 // imod == '00' && M == '0' --> UNPREDICTABLE
1531 Inst.setOpcode(ARM::CPS1p);
1532 Inst.addOperand(MCOperand::CreateImm(mode));
1533 S = MCDisassembler::SoftFail;
1539 static DecodeStatus DecodeT2CPSInstruction(llvm::MCInst &Inst, unsigned Insn,
1540 uint64_t Address, const void *Decoder) {
1541 unsigned imod = fieldFromInstruction32(Insn, 9, 2);
1542 unsigned M = fieldFromInstruction32(Insn, 8, 1);
1543 unsigned iflags = fieldFromInstruction32(Insn, 5, 3);
1544 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1546 DecodeStatus S = MCDisassembler::Success;
1548 // imod == '01' --> UNPREDICTABLE
1549 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1550 // return failure here. The '01' imod value is unprintable, so there's
1551 // nothing useful we could do even if we returned UNPREDICTABLE.
1553 if (imod == 1) return MCDisassembler::Fail;
1556 Inst.setOpcode(ARM::t2CPS3p);
1557 Inst.addOperand(MCOperand::CreateImm(imod));
1558 Inst.addOperand(MCOperand::CreateImm(iflags));
1559 Inst.addOperand(MCOperand::CreateImm(mode));
1560 } else if (imod && !M) {
1561 Inst.setOpcode(ARM::t2CPS2p);
1562 Inst.addOperand(MCOperand::CreateImm(imod));
1563 Inst.addOperand(MCOperand::CreateImm(iflags));
1564 if (mode) S = MCDisassembler::SoftFail;
1565 } else if (!imod && M) {
1566 Inst.setOpcode(ARM::t2CPS1p);
1567 Inst.addOperand(MCOperand::CreateImm(mode));
1568 if (iflags) S = MCDisassembler::SoftFail;
1570 // imod == '00' && M == '0' --> UNPREDICTABLE
1571 Inst.setOpcode(ARM::t2CPS1p);
1572 Inst.addOperand(MCOperand::CreateImm(mode));
1573 S = MCDisassembler::SoftFail;
1580 static DecodeStatus DecodeSMLAInstruction(llvm::MCInst &Inst, unsigned Insn,
1581 uint64_t Address, const void *Decoder) {
1582 DecodeStatus S = MCDisassembler::Success;
1584 unsigned Rd = fieldFromInstruction32(Insn, 16, 4);
1585 unsigned Rn = fieldFromInstruction32(Insn, 0, 4);
1586 unsigned Rm = fieldFromInstruction32(Insn, 8, 4);
1587 unsigned Ra = fieldFromInstruction32(Insn, 12, 4);
1588 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1591 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
1593 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
1594 return MCDisassembler::Fail;
1595 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
1596 return MCDisassembler::Fail;
1597 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
1598 return MCDisassembler::Fail;
1599 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
1600 return MCDisassembler::Fail;
1602 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1603 return MCDisassembler::Fail;
1608 static DecodeStatus DecodeAddrModeImm12Operand(llvm::MCInst &Inst, unsigned Val,
1609 uint64_t Address, const void *Decoder) {
1610 DecodeStatus S = MCDisassembler::Success;
1612 unsigned add = fieldFromInstruction32(Val, 12, 1);
1613 unsigned imm = fieldFromInstruction32(Val, 0, 12);
1614 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1616 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1617 return MCDisassembler::Fail;
1619 if (!add) imm *= -1;
1620 if (imm == 0 && !add) imm = INT32_MIN;
1621 Inst.addOperand(MCOperand::CreateImm(imm));
1626 static DecodeStatus DecodeAddrMode5Operand(llvm::MCInst &Inst, unsigned Val,
1627 uint64_t Address, const void *Decoder) {
1628 DecodeStatus S = MCDisassembler::Success;
1630 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
1631 unsigned U = fieldFromInstruction32(Val, 8, 1);
1632 unsigned imm = fieldFromInstruction32(Val, 0, 8);
1634 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
1635 return MCDisassembler::Fail;
1638 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
1640 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
1645 static DecodeStatus DecodeAddrMode7Operand(llvm::MCInst &Inst, unsigned Val,
1646 uint64_t Address, const void *Decoder) {
1647 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
1651 DecodeBranchImmInstruction(llvm::MCInst &Inst, unsigned Insn,
1652 uint64_t Address, const void *Decoder) {
1653 DecodeStatus S = MCDisassembler::Success;
1655 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1656 unsigned imm = fieldFromInstruction32(Insn, 0, 24) << 2;
1659 Inst.setOpcode(ARM::BLXi);
1660 imm |= fieldFromInstruction32(Insn, 24, 1) << 1;
1661 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1665 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1666 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
1667 return MCDisassembler::Fail;
1673 static DecodeStatus DecodeVCVTImmOperand(llvm::MCInst &Inst, unsigned Val,
1674 uint64_t Address, const void *Decoder) {
1675 Inst.addOperand(MCOperand::CreateImm(64 - Val));
1676 return MCDisassembler::Success;
1679 static DecodeStatus DecodeAddrMode6Operand(llvm::MCInst &Inst, unsigned Val,
1680 uint64_t Address, const void *Decoder) {
1681 DecodeStatus S = MCDisassembler::Success;
1683 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1684 unsigned align = fieldFromInstruction32(Val, 4, 2);
1686 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1687 return MCDisassembler::Fail;
1689 Inst.addOperand(MCOperand::CreateImm(0));
1691 Inst.addOperand(MCOperand::CreateImm(4 << align));
1696 static DecodeStatus DecodeVLDInstruction(llvm::MCInst &Inst, unsigned Insn,
1697 uint64_t Address, const void *Decoder) {
1698 DecodeStatus S = MCDisassembler::Success;
1700 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1701 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1702 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
1703 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1704 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
1705 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1707 // First output register
1708 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
1709 return MCDisassembler::Fail;
1711 // Second output register
1712 switch (Inst.getOpcode()) {
1717 case ARM::VLD1q8_UPD:
1718 case ARM::VLD1q16_UPD:
1719 case ARM::VLD1q32_UPD:
1720 case ARM::VLD1q64_UPD:
1725 case ARM::VLD1d8T_UPD:
1726 case ARM::VLD1d16T_UPD:
1727 case ARM::VLD1d32T_UPD:
1728 case ARM::VLD1d64T_UPD:
1733 case ARM::VLD1d8Q_UPD:
1734 case ARM::VLD1d16Q_UPD:
1735 case ARM::VLD1d32Q_UPD:
1736 case ARM::VLD1d64Q_UPD:
1740 case ARM::VLD2d8_UPD:
1741 case ARM::VLD2d16_UPD:
1742 case ARM::VLD2d32_UPD:
1746 case ARM::VLD2q8_UPD:
1747 case ARM::VLD2q16_UPD:
1748 case ARM::VLD2q32_UPD:
1752 case ARM::VLD3d8_UPD:
1753 case ARM::VLD3d16_UPD:
1754 case ARM::VLD3d32_UPD:
1758 case ARM::VLD4d8_UPD:
1759 case ARM::VLD4d16_UPD:
1760 case ARM::VLD4d32_UPD:
1761 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
1762 return MCDisassembler::Fail;
1767 case ARM::VLD2b8_UPD:
1768 case ARM::VLD2b16_UPD:
1769 case ARM::VLD2b32_UPD:
1773 case ARM::VLD3q8_UPD:
1774 case ARM::VLD3q16_UPD:
1775 case ARM::VLD3q32_UPD:
1779 case ARM::VLD4q8_UPD:
1780 case ARM::VLD4q16_UPD:
1781 case ARM::VLD4q32_UPD:
1782 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
1783 return MCDisassembler::Fail;
1788 // Third output register
1789 switch(Inst.getOpcode()) {
1794 case ARM::VLD1d8T_UPD:
1795 case ARM::VLD1d16T_UPD:
1796 case ARM::VLD1d32T_UPD:
1797 case ARM::VLD1d64T_UPD:
1802 case ARM::VLD1d8Q_UPD:
1803 case ARM::VLD1d16Q_UPD:
1804 case ARM::VLD1d32Q_UPD:
1805 case ARM::VLD1d64Q_UPD:
1809 case ARM::VLD2q8_UPD:
1810 case ARM::VLD2q16_UPD:
1811 case ARM::VLD2q32_UPD:
1815 case ARM::VLD3d8_UPD:
1816 case ARM::VLD3d16_UPD:
1817 case ARM::VLD3d32_UPD:
1821 case ARM::VLD4d8_UPD:
1822 case ARM::VLD4d16_UPD:
1823 case ARM::VLD4d32_UPD:
1824 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
1825 return MCDisassembler::Fail;
1830 case ARM::VLD3q8_UPD:
1831 case ARM::VLD3q16_UPD:
1832 case ARM::VLD3q32_UPD:
1836 case ARM::VLD4q8_UPD:
1837 case ARM::VLD4q16_UPD:
1838 case ARM::VLD4q32_UPD:
1839 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
1840 return MCDisassembler::Fail;
1846 // Fourth output register
1847 switch (Inst.getOpcode()) {
1852 case ARM::VLD1d8Q_UPD:
1853 case ARM::VLD1d16Q_UPD:
1854 case ARM::VLD1d32Q_UPD:
1855 case ARM::VLD1d64Q_UPD:
1859 case ARM::VLD2q8_UPD:
1860 case ARM::VLD2q16_UPD:
1861 case ARM::VLD2q32_UPD:
1865 case ARM::VLD4d8_UPD:
1866 case ARM::VLD4d16_UPD:
1867 case ARM::VLD4d32_UPD:
1868 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
1869 return MCDisassembler::Fail;
1874 case ARM::VLD4q8_UPD:
1875 case ARM::VLD4q16_UPD:
1876 case ARM::VLD4q32_UPD:
1877 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
1878 return MCDisassembler::Fail;
1884 // Writeback operand
1885 switch (Inst.getOpcode()) {
1886 case ARM::VLD1d8_UPD:
1887 case ARM::VLD1d16_UPD:
1888 case ARM::VLD1d32_UPD:
1889 case ARM::VLD1d64_UPD:
1890 case ARM::VLD1q8_UPD:
1891 case ARM::VLD1q16_UPD:
1892 case ARM::VLD1q32_UPD:
1893 case ARM::VLD1q64_UPD:
1894 case ARM::VLD1d8T_UPD:
1895 case ARM::VLD1d16T_UPD:
1896 case ARM::VLD1d32T_UPD:
1897 case ARM::VLD1d64T_UPD:
1898 case ARM::VLD1d8Q_UPD:
1899 case ARM::VLD1d16Q_UPD:
1900 case ARM::VLD1d32Q_UPD:
1901 case ARM::VLD1d64Q_UPD:
1902 case ARM::VLD2d8_UPD:
1903 case ARM::VLD2d16_UPD:
1904 case ARM::VLD2d32_UPD:
1905 case ARM::VLD2q8_UPD:
1906 case ARM::VLD2q16_UPD:
1907 case ARM::VLD2q32_UPD:
1908 case ARM::VLD2b8_UPD:
1909 case ARM::VLD2b16_UPD:
1910 case ARM::VLD2b32_UPD:
1911 case ARM::VLD3d8_UPD:
1912 case ARM::VLD3d16_UPD:
1913 case ARM::VLD3d32_UPD:
1914 case ARM::VLD3q8_UPD:
1915 case ARM::VLD3q16_UPD:
1916 case ARM::VLD3q32_UPD:
1917 case ARM::VLD4d8_UPD:
1918 case ARM::VLD4d16_UPD:
1919 case ARM::VLD4d32_UPD:
1920 case ARM::VLD4q8_UPD:
1921 case ARM::VLD4q16_UPD:
1922 case ARM::VLD4q32_UPD:
1923 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
1924 return MCDisassembler::Fail;
1930 // AddrMode6 Base (register+alignment)
1931 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
1932 return MCDisassembler::Fail;
1934 // AddrMode6 Offset (register)
1936 Inst.addOperand(MCOperand::CreateReg(0));
1937 else if (Rm != 0xF) {
1938 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
1939 return MCDisassembler::Fail;
1945 static DecodeStatus DecodeVSTInstruction(llvm::MCInst &Inst, unsigned Insn,
1946 uint64_t Address, const void *Decoder) {
1947 DecodeStatus S = MCDisassembler::Success;
1949 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1950 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1951 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
1952 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1953 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
1954 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1956 // Writeback Operand
1957 switch (Inst.getOpcode()) {
1958 case ARM::VST1d8_UPD:
1959 case ARM::VST1d16_UPD:
1960 case ARM::VST1d32_UPD:
1961 case ARM::VST1d64_UPD:
1962 case ARM::VST1q8_UPD:
1963 case ARM::VST1q16_UPD:
1964 case ARM::VST1q32_UPD:
1965 case ARM::VST1q64_UPD:
1966 case ARM::VST1d8T_UPD:
1967 case ARM::VST1d16T_UPD:
1968 case ARM::VST1d32T_UPD:
1969 case ARM::VST1d64T_UPD:
1970 case ARM::VST1d8Q_UPD:
1971 case ARM::VST1d16Q_UPD:
1972 case ARM::VST1d32Q_UPD:
1973 case ARM::VST1d64Q_UPD:
1974 case ARM::VST2d8_UPD:
1975 case ARM::VST2d16_UPD:
1976 case ARM::VST2d32_UPD:
1977 case ARM::VST2q8_UPD:
1978 case ARM::VST2q16_UPD:
1979 case ARM::VST2q32_UPD:
1980 case ARM::VST2b8_UPD:
1981 case ARM::VST2b16_UPD:
1982 case ARM::VST2b32_UPD:
1983 case ARM::VST3d8_UPD:
1984 case ARM::VST3d16_UPD:
1985 case ARM::VST3d32_UPD:
1986 case ARM::VST3q8_UPD:
1987 case ARM::VST3q16_UPD:
1988 case ARM::VST3q32_UPD:
1989 case ARM::VST4d8_UPD:
1990 case ARM::VST4d16_UPD:
1991 case ARM::VST4d32_UPD:
1992 case ARM::VST4q8_UPD:
1993 case ARM::VST4q16_UPD:
1994 case ARM::VST4q32_UPD:
1995 if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
1996 return MCDisassembler::Fail;
2002 // AddrMode6 Base (register+alignment)
2003 if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
2004 return MCDisassembler::Fail;
2006 // AddrMode6 Offset (register)
2008 Inst.addOperand(MCOperand::CreateReg(0));
2009 else if (Rm != 0xF) {
2010 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2011 return MCDisassembler::Fail;
2014 // First input register
2015 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2016 return MCDisassembler::Fail;
2018 // Second input register
2019 switch (Inst.getOpcode()) {
2024 case ARM::VST1q8_UPD:
2025 case ARM::VST1q16_UPD:
2026 case ARM::VST1q32_UPD:
2027 case ARM::VST1q64_UPD:
2032 case ARM::VST1d8T_UPD:
2033 case ARM::VST1d16T_UPD:
2034 case ARM::VST1d32T_UPD:
2035 case ARM::VST1d64T_UPD:
2040 case ARM::VST1d8Q_UPD:
2041 case ARM::VST1d16Q_UPD:
2042 case ARM::VST1d32Q_UPD:
2043 case ARM::VST1d64Q_UPD:
2047 case ARM::VST2d8_UPD:
2048 case ARM::VST2d16_UPD:
2049 case ARM::VST2d32_UPD:
2053 case ARM::VST2q8_UPD:
2054 case ARM::VST2q16_UPD:
2055 case ARM::VST2q32_UPD:
2059 case ARM::VST3d8_UPD:
2060 case ARM::VST3d16_UPD:
2061 case ARM::VST3d32_UPD:
2065 case ARM::VST4d8_UPD:
2066 case ARM::VST4d16_UPD:
2067 case ARM::VST4d32_UPD:
2068 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2069 return MCDisassembler::Fail;
2074 case ARM::VST2b8_UPD:
2075 case ARM::VST2b16_UPD:
2076 case ARM::VST2b32_UPD:
2080 case ARM::VST3q8_UPD:
2081 case ARM::VST3q16_UPD:
2082 case ARM::VST3q32_UPD:
2086 case ARM::VST4q8_UPD:
2087 case ARM::VST4q16_UPD:
2088 case ARM::VST4q32_UPD:
2089 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2090 return MCDisassembler::Fail;
2096 // Third input register
2097 switch (Inst.getOpcode()) {
2102 case ARM::VST1d8T_UPD:
2103 case ARM::VST1d16T_UPD:
2104 case ARM::VST1d32T_UPD:
2105 case ARM::VST1d64T_UPD:
2110 case ARM::VST1d8Q_UPD:
2111 case ARM::VST1d16Q_UPD:
2112 case ARM::VST1d32Q_UPD:
2113 case ARM::VST1d64Q_UPD:
2117 case ARM::VST2q8_UPD:
2118 case ARM::VST2q16_UPD:
2119 case ARM::VST2q32_UPD:
2123 case ARM::VST3d8_UPD:
2124 case ARM::VST3d16_UPD:
2125 case ARM::VST3d32_UPD:
2129 case ARM::VST4d8_UPD:
2130 case ARM::VST4d16_UPD:
2131 case ARM::VST4d32_UPD:
2132 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
2133 return MCDisassembler::Fail;
2138 case ARM::VST3q8_UPD:
2139 case ARM::VST3q16_UPD:
2140 case ARM::VST3q32_UPD:
2144 case ARM::VST4q8_UPD:
2145 case ARM::VST4q16_UPD:
2146 case ARM::VST4q32_UPD:
2147 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
2148 return MCDisassembler::Fail;
2154 // Fourth input register
2155 switch (Inst.getOpcode()) {
2160 case ARM::VST1d8Q_UPD:
2161 case ARM::VST1d16Q_UPD:
2162 case ARM::VST1d32Q_UPD:
2163 case ARM::VST1d64Q_UPD:
2167 case ARM::VST2q8_UPD:
2168 case ARM::VST2q16_UPD:
2169 case ARM::VST2q32_UPD:
2173 case ARM::VST4d8_UPD:
2174 case ARM::VST4d16_UPD:
2175 case ARM::VST4d32_UPD:
2176 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
2177 return MCDisassembler::Fail;
2182 case ARM::VST4q8_UPD:
2183 case ARM::VST4q16_UPD:
2184 case ARM::VST4q32_UPD:
2185 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
2186 return MCDisassembler::Fail;
2195 static DecodeStatus DecodeVLD1DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2196 uint64_t Address, const void *Decoder) {
2197 DecodeStatus S = MCDisassembler::Success;
2199 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2200 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2201 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2202 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2203 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2204 unsigned size = fieldFromInstruction32(Insn, 6, 2);
2205 unsigned regs = fieldFromInstruction32(Insn, 5, 1) + 1;
2207 align *= (1 << size);
2209 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2210 return MCDisassembler::Fail;
2212 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
2213 return MCDisassembler::Fail;
2216 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2217 return MCDisassembler::Fail;
2220 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2221 return MCDisassembler::Fail;
2222 Inst.addOperand(MCOperand::CreateImm(align));
2225 Inst.addOperand(MCOperand::CreateReg(0));
2226 else if (Rm != 0xF) {
2227 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2228 return MCDisassembler::Fail;
2234 static DecodeStatus DecodeVLD2DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2235 uint64_t Address, const void *Decoder) {
2236 DecodeStatus S = MCDisassembler::Success;
2238 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2239 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2240 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2241 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2242 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2243 unsigned size = 1 << fieldFromInstruction32(Insn, 6, 2);
2244 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2247 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2248 return MCDisassembler::Fail;
2249 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2250 return MCDisassembler::Fail;
2252 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2253 return MCDisassembler::Fail;
2256 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2257 return MCDisassembler::Fail;
2258 Inst.addOperand(MCOperand::CreateImm(align));
2261 Inst.addOperand(MCOperand::CreateReg(0));
2262 else if (Rm != 0xF) {
2263 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2264 return MCDisassembler::Fail;
2270 static DecodeStatus DecodeVLD3DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2271 uint64_t Address, const void *Decoder) {
2272 DecodeStatus S = MCDisassembler::Success;
2274 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2275 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2276 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2277 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2278 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2280 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2281 return MCDisassembler::Fail;
2282 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2283 return MCDisassembler::Fail;
2284 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2285 return MCDisassembler::Fail;
2287 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2288 return MCDisassembler::Fail;
2291 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2292 return MCDisassembler::Fail;
2293 Inst.addOperand(MCOperand::CreateImm(0));
2296 Inst.addOperand(MCOperand::CreateReg(0));
2297 else if (Rm != 0xF) {
2298 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2299 return MCDisassembler::Fail;
2305 static DecodeStatus DecodeVLD4DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2306 uint64_t Address, const void *Decoder) {
2307 DecodeStatus S = MCDisassembler::Success;
2309 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2310 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2311 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2312 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2313 unsigned size = fieldFromInstruction32(Insn, 6, 2);
2314 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2315 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2330 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2331 return MCDisassembler::Fail;
2332 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
2333 return MCDisassembler::Fail;
2334 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
2335 return MCDisassembler::Fail;
2336 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
2337 return MCDisassembler::Fail;
2339 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2340 return MCDisassembler::Fail;
2343 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2344 return MCDisassembler::Fail;
2345 Inst.addOperand(MCOperand::CreateImm(align));
2348 Inst.addOperand(MCOperand::CreateReg(0));
2349 else if (Rm != 0xF) {
2350 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2351 return MCDisassembler::Fail;
2358 DecodeNEONModImmInstruction(llvm::MCInst &Inst, unsigned Insn,
2359 uint64_t Address, const void *Decoder) {
2360 DecodeStatus S = MCDisassembler::Success;
2362 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2363 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2364 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
2365 imm |= fieldFromInstruction32(Insn, 16, 3) << 4;
2366 imm |= fieldFromInstruction32(Insn, 24, 1) << 7;
2367 imm |= fieldFromInstruction32(Insn, 8, 4) << 8;
2368 imm |= fieldFromInstruction32(Insn, 5, 1) << 12;
2369 unsigned Q = fieldFromInstruction32(Insn, 6, 1);
2372 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2373 return MCDisassembler::Fail;
2375 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2376 return MCDisassembler::Fail;
2379 Inst.addOperand(MCOperand::CreateImm(imm));
2381 switch (Inst.getOpcode()) {
2382 case ARM::VORRiv4i16:
2383 case ARM::VORRiv2i32:
2384 case ARM::VBICiv4i16:
2385 case ARM::VBICiv2i32:
2386 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2387 return MCDisassembler::Fail;
2389 case ARM::VORRiv8i16:
2390 case ARM::VORRiv4i32:
2391 case ARM::VBICiv8i16:
2392 case ARM::VBICiv4i32:
2393 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2394 return MCDisassembler::Fail;
2403 static DecodeStatus DecodeVSHLMaxInstruction(llvm::MCInst &Inst, unsigned Insn,
2404 uint64_t Address, const void *Decoder) {
2405 DecodeStatus S = MCDisassembler::Success;
2407 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2408 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2409 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2410 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2411 unsigned size = fieldFromInstruction32(Insn, 18, 2);
2413 if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
2414 return MCDisassembler::Fail;
2415 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2416 return MCDisassembler::Fail;
2417 Inst.addOperand(MCOperand::CreateImm(8 << size));
2422 static DecodeStatus DecodeShiftRight8Imm(llvm::MCInst &Inst, unsigned Val,
2423 uint64_t Address, const void *Decoder) {
2424 Inst.addOperand(MCOperand::CreateImm(8 - Val));
2425 return MCDisassembler::Success;
2428 static DecodeStatus DecodeShiftRight16Imm(llvm::MCInst &Inst, unsigned Val,
2429 uint64_t Address, const void *Decoder) {
2430 Inst.addOperand(MCOperand::CreateImm(16 - Val));
2431 return MCDisassembler::Success;
2434 static DecodeStatus DecodeShiftRight32Imm(llvm::MCInst &Inst, unsigned Val,
2435 uint64_t Address, const void *Decoder) {
2436 Inst.addOperand(MCOperand::CreateImm(32 - Val));
2437 return MCDisassembler::Success;
2440 static DecodeStatus DecodeShiftRight64Imm(llvm::MCInst &Inst, unsigned Val,
2441 uint64_t Address, const void *Decoder) {
2442 Inst.addOperand(MCOperand::CreateImm(64 - Val));
2443 return MCDisassembler::Success;
2446 static DecodeStatus DecodeTBLInstruction(llvm::MCInst &Inst, unsigned Insn,
2447 uint64_t Address, const void *Decoder) {
2448 DecodeStatus S = MCDisassembler::Success;
2450 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2451 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2452 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2453 Rn |= fieldFromInstruction32(Insn, 7, 1) << 4;
2454 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2455 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2456 unsigned op = fieldFromInstruction32(Insn, 6, 1);
2457 unsigned length = fieldFromInstruction32(Insn, 8, 2) + 1;
2459 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2460 return MCDisassembler::Fail;
2462 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
2463 return MCDisassembler::Fail; // Writeback
2466 for (unsigned i = 0; i < length; ++i) {
2467 if (!Check(S, DecodeDPRRegisterClass(Inst, (Rn+i)%32, Address, Decoder)))
2468 return MCDisassembler::Fail;
2471 if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
2472 return MCDisassembler::Fail;
2477 static DecodeStatus DecodeVFPfpImm(llvm::MCInst &Inst, unsigned Val,
2478 uint64_t Address, const void *Decoder) {
2479 // The immediate needs to be a fully instantiated float. However, the
2480 // auto-generated decoder is only able to fill in some of the bits
2481 // necessary. For instance, the 'b' bit is replicated multiple times,
2482 // and is even present in inverted form in one bit. We do a little
2483 // binary parsing here to fill in those missing bits, and then
2484 // reinterpret it all as a float.
2490 fp_conv.integer = Val;
2491 uint32_t b = fieldFromInstruction32(Val, 25, 1);
2492 fp_conv.integer |= b << 26;
2493 fp_conv.integer |= b << 27;
2494 fp_conv.integer |= b << 28;
2495 fp_conv.integer |= b << 29;
2496 fp_conv.integer |= (~b & 0x1) << 30;
2498 Inst.addOperand(MCOperand::CreateFPImm(fp_conv.fp));
2499 return MCDisassembler::Success;
2502 static DecodeStatus DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn,
2503 uint64_t Address, const void *Decoder) {
2504 DecodeStatus S = MCDisassembler::Success;
2506 unsigned dst = fieldFromInstruction16(Insn, 8, 3);
2507 unsigned imm = fieldFromInstruction16(Insn, 0, 8);
2509 if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
2510 return MCDisassembler::Fail;
2512 switch(Inst.getOpcode()) {
2514 return MCDisassembler::Fail;
2516 break; // tADR does not explicitly represent the PC as an operand.
2518 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2522 Inst.addOperand(MCOperand::CreateImm(imm));
2526 static DecodeStatus DecodeThumbBROperand(llvm::MCInst &Inst, unsigned Val,
2527 uint64_t Address, const void *Decoder) {
2528 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
2529 return MCDisassembler::Success;
2532 static DecodeStatus DecodeT2BROperand(llvm::MCInst &Inst, unsigned Val,
2533 uint64_t Address, const void *Decoder) {
2534 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
2535 return MCDisassembler::Success;
2538 static DecodeStatus DecodeThumbCmpBROperand(llvm::MCInst &Inst, unsigned Val,
2539 uint64_t Address, const void *Decoder) {
2540 Inst.addOperand(MCOperand::CreateImm(SignExtend32<7>(Val << 1)));
2541 return MCDisassembler::Success;
2544 static DecodeStatus DecodeThumbAddrModeRR(llvm::MCInst &Inst, unsigned Val,
2545 uint64_t Address, const void *Decoder) {
2546 DecodeStatus S = MCDisassembler::Success;
2548 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2549 unsigned Rm = fieldFromInstruction32(Val, 3, 3);
2551 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
2552 return MCDisassembler::Fail;
2553 if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
2554 return MCDisassembler::Fail;
2559 static DecodeStatus DecodeThumbAddrModeIS(llvm::MCInst &Inst, unsigned Val,
2560 uint64_t Address, const void *Decoder) {
2561 DecodeStatus S = MCDisassembler::Success;
2563 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2564 unsigned imm = fieldFromInstruction32(Val, 3, 5);
2566 if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
2567 return MCDisassembler::Fail;
2568 Inst.addOperand(MCOperand::CreateImm(imm));
2573 static DecodeStatus DecodeThumbAddrModePC(llvm::MCInst &Inst, unsigned Val,
2574 uint64_t Address, const void *Decoder) {
2575 Inst.addOperand(MCOperand::CreateImm(Val << 2));
2577 return MCDisassembler::Success;
2580 static DecodeStatus DecodeThumbAddrModeSP(llvm::MCInst &Inst, unsigned Val,
2581 uint64_t Address, const void *Decoder) {
2582 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2583 Inst.addOperand(MCOperand::CreateImm(Val));
2585 return MCDisassembler::Success;
2588 static DecodeStatus DecodeT2AddrModeSOReg(llvm::MCInst &Inst, unsigned Val,
2589 uint64_t Address, const void *Decoder) {
2590 DecodeStatus S = MCDisassembler::Success;
2592 unsigned Rn = fieldFromInstruction32(Val, 6, 4);
2593 unsigned Rm = fieldFromInstruction32(Val, 2, 4);
2594 unsigned imm = fieldFromInstruction32(Val, 0, 2);
2596 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2597 return MCDisassembler::Fail;
2598 if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
2599 return MCDisassembler::Fail;
2600 Inst.addOperand(MCOperand::CreateImm(imm));
2605 static DecodeStatus DecodeT2LoadShift(llvm::MCInst &Inst, unsigned Insn,
2606 uint64_t Address, const void *Decoder) {
2607 DecodeStatus S = MCDisassembler::Success;
2609 switch (Inst.getOpcode()) {
2615 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2616 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
2617 return MCDisassembler::Fail;
2621 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2623 switch (Inst.getOpcode()) {
2625 Inst.setOpcode(ARM::t2LDRBpci);
2628 Inst.setOpcode(ARM::t2LDRHpci);
2631 Inst.setOpcode(ARM::t2LDRSHpci);
2634 Inst.setOpcode(ARM::t2LDRSBpci);
2637 Inst.setOpcode(ARM::t2PLDi12);
2638 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
2641 return MCDisassembler::Fail;
2644 int imm = fieldFromInstruction32(Insn, 0, 12);
2645 if (!fieldFromInstruction32(Insn, 23, 1)) imm *= -1;
2646 Inst.addOperand(MCOperand::CreateImm(imm));
2651 unsigned addrmode = fieldFromInstruction32(Insn, 4, 2);
2652 addrmode |= fieldFromInstruction32(Insn, 0, 4) << 2;
2653 addrmode |= fieldFromInstruction32(Insn, 16, 4) << 6;
2654 if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
2655 return MCDisassembler::Fail;
2660 static DecodeStatus DecodeT2Imm8S4(llvm::MCInst &Inst, unsigned Val,
2661 uint64_t Address, const void *Decoder) {
2662 int imm = Val & 0xFF;
2663 if (!(Val & 0x100)) imm *= -1;
2664 Inst.addOperand(MCOperand::CreateImm(imm << 2));
2666 return MCDisassembler::Success;
2669 static DecodeStatus DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val,
2670 uint64_t Address, const void *Decoder) {
2671 DecodeStatus S = MCDisassembler::Success;
2673 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2674 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2676 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2677 return MCDisassembler::Fail;
2678 if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
2679 return MCDisassembler::Fail;
2684 static DecodeStatus DecodeT2AddrModeImm0_1020s4(llvm::MCInst &Inst,unsigned Val,
2685 uint64_t Address, const void *Decoder) {
2686 DecodeStatus S = MCDisassembler::Success;
2688 unsigned Rn = fieldFromInstruction32(Val, 8, 4);
2689 unsigned imm = fieldFromInstruction32(Val, 0, 8);
2691 if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
2692 return MCDisassembler::Fail;
2694 Inst.addOperand(MCOperand::CreateImm(imm));
2699 static DecodeStatus DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
2700 uint64_t Address, const void *Decoder) {
2701 int imm = Val & 0xFF;
2702 if (!(Val & 0x100)) imm *= -1;
2703 Inst.addOperand(MCOperand::CreateImm(imm));
2705 return MCDisassembler::Success;
2709 static DecodeStatus DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val,
2710 uint64_t Address, const void *Decoder) {
2711 DecodeStatus S = MCDisassembler::Success;
2713 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2714 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2716 // Some instructions always use an additive offset.
2717 switch (Inst.getOpcode()) {
2729 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2730 return MCDisassembler::Fail;
2731 if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
2732 return MCDisassembler::Fail;
2738 static DecodeStatus DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val,
2739 uint64_t Address, const void *Decoder) {
2740 DecodeStatus S = MCDisassembler::Success;
2742 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
2743 unsigned imm = fieldFromInstruction32(Val, 0, 12);
2745 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2746 return MCDisassembler::Fail;
2747 Inst.addOperand(MCOperand::CreateImm(imm));
2753 static DecodeStatus DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Insn,
2754 uint64_t Address, const void *Decoder) {
2755 unsigned imm = fieldFromInstruction16(Insn, 0, 7);
2757 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2758 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2759 Inst.addOperand(MCOperand::CreateImm(imm));
2761 return MCDisassembler::Success;
2764 static DecodeStatus DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn,
2765 uint64_t Address, const void *Decoder) {
2766 DecodeStatus S = MCDisassembler::Success;
2768 if (Inst.getOpcode() == ARM::tADDrSP) {
2769 unsigned Rdm = fieldFromInstruction16(Insn, 0, 3);
2770 Rdm |= fieldFromInstruction16(Insn, 7, 1) << 3;
2772 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
2773 return MCDisassembler::Fail;
2774 if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
2775 return MCDisassembler::Fail;
2776 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2777 } else if (Inst.getOpcode() == ARM::tADDspr) {
2778 unsigned Rm = fieldFromInstruction16(Insn, 3, 4);
2780 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2781 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2782 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2783 return MCDisassembler::Fail;
2789 static DecodeStatus DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn,
2790 uint64_t Address, const void *Decoder) {
2791 unsigned imod = fieldFromInstruction16(Insn, 4, 1) | 0x2;
2792 unsigned flags = fieldFromInstruction16(Insn, 0, 3);
2794 Inst.addOperand(MCOperand::CreateImm(imod));
2795 Inst.addOperand(MCOperand::CreateImm(flags));
2797 return MCDisassembler::Success;
2800 static DecodeStatus DecodePostIdxReg(llvm::MCInst &Inst, unsigned Insn,
2801 uint64_t Address, const void *Decoder) {
2802 DecodeStatus S = MCDisassembler::Success;
2803 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2804 unsigned add = fieldFromInstruction32(Insn, 4, 1);
2806 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
2807 return MCDisassembler::Fail;
2808 Inst.addOperand(MCOperand::CreateImm(add));
2813 static DecodeStatus DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Val,
2814 uint64_t Address, const void *Decoder) {
2815 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
2816 return MCDisassembler::Success;
2819 static DecodeStatus DecodeCoprocessor(llvm::MCInst &Inst, unsigned Val,
2820 uint64_t Address, const void *Decoder) {
2821 if (Val == 0xA || Val == 0xB)
2822 return MCDisassembler::Fail;
2824 Inst.addOperand(MCOperand::CreateImm(Val));
2825 return MCDisassembler::Success;
2829 DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Insn,
2830 uint64_t Address, const void *Decoder) {
2831 DecodeStatus S = MCDisassembler::Success;
2833 unsigned pred = fieldFromInstruction32(Insn, 22, 4);
2834 if (pred == 0xE || pred == 0xF) {
2835 unsigned opc = fieldFromInstruction32(Insn, 4, 28);
2838 return MCDisassembler::Fail;
2840 Inst.setOpcode(ARM::t2DSB);
2843 Inst.setOpcode(ARM::t2DMB);
2846 Inst.setOpcode(ARM::t2ISB);
2850 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
2851 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
2854 unsigned brtarget = fieldFromInstruction32(Insn, 0, 11) << 1;
2855 brtarget |= fieldFromInstruction32(Insn, 11, 1) << 19;
2856 brtarget |= fieldFromInstruction32(Insn, 13, 1) << 18;
2857 brtarget |= fieldFromInstruction32(Insn, 16, 6) << 12;
2858 brtarget |= fieldFromInstruction32(Insn, 26, 1) << 20;
2860 if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
2861 return MCDisassembler::Fail;
2862 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2863 return MCDisassembler::Fail;
2868 // Decode a shifted immediate operand. These basically consist
2869 // of an 8-bit value, and a 4-bit directive that specifies either
2870 // a splat operation or a rotation.
2871 static DecodeStatus DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val,
2872 uint64_t Address, const void *Decoder) {
2873 unsigned ctrl = fieldFromInstruction32(Val, 10, 2);
2875 unsigned byte = fieldFromInstruction32(Val, 8, 2);
2876 unsigned imm = fieldFromInstruction32(Val, 0, 8);
2879 Inst.addOperand(MCOperand::CreateImm(imm));
2882 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
2885 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
2888 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
2893 unsigned unrot = fieldFromInstruction32(Val, 0, 7) | 0x80;
2894 unsigned rot = fieldFromInstruction32(Val, 7, 5);
2895 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
2896 Inst.addOperand(MCOperand::CreateImm(imm));
2899 return MCDisassembler::Success;
2903 DecodeThumbBCCTargetOperand(llvm::MCInst &Inst, unsigned Val,
2904 uint64_t Address, const void *Decoder){
2905 Inst.addOperand(MCOperand::CreateImm(Val << 1));
2906 return MCDisassembler::Success;
2909 static DecodeStatus DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
2910 uint64_t Address, const void *Decoder){
2911 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
2912 return MCDisassembler::Success;
2915 static DecodeStatus DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Val,
2916 uint64_t Address, const void *Decoder) {
2919 return MCDisassembler::Fail;
2931 Inst.addOperand(MCOperand::CreateImm(Val));
2932 return MCDisassembler::Success;
2935 static DecodeStatus DecodeMSRMask(llvm::MCInst &Inst, unsigned Val,
2936 uint64_t Address, const void *Decoder) {
2937 if (!Val) return MCDisassembler::Fail;
2938 Inst.addOperand(MCOperand::CreateImm(Val));
2939 return MCDisassembler::Success;
2942 static DecodeStatus DecodeDoubleRegLoad(llvm::MCInst &Inst, unsigned Insn,
2943 uint64_t Address, const void *Decoder) {
2944 DecodeStatus S = MCDisassembler::Success;
2946 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2947 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2948 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
2950 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
2952 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
2953 return MCDisassembler::Fail;
2954 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
2955 return MCDisassembler::Fail;
2956 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2957 return MCDisassembler::Fail;
2958 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2959 return MCDisassembler::Fail;
2965 static DecodeStatus DecodeDoubleRegStore(llvm::MCInst &Inst, unsigned Insn,
2966 uint64_t Address, const void *Decoder){
2967 DecodeStatus S = MCDisassembler::Success;
2969 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2970 unsigned Rt = fieldFromInstruction32(Insn, 0, 4);
2971 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2972 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
2974 if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
2975 return MCDisassembler::Fail;
2977 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
2978 if (Rd == Rn || Rd == Rt || Rd == Rt+1) return MCDisassembler::Fail;
2980 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
2981 return MCDisassembler::Fail;
2982 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
2983 return MCDisassembler::Fail;
2984 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
2985 return MCDisassembler::Fail;
2986 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
2987 return MCDisassembler::Fail;
2992 static DecodeStatus DecodeLDRPreImm(llvm::MCInst &Inst, unsigned Insn,
2993 uint64_t Address, const void *Decoder) {
2994 DecodeStatus S = MCDisassembler::Success;
2996 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2997 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2998 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
2999 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3000 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3001 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3003 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3005 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3006 return MCDisassembler::Fail;
3007 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3008 return MCDisassembler::Fail;
3009 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3010 return MCDisassembler::Fail;
3011 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3012 return MCDisassembler::Fail;
3017 static DecodeStatus DecodeLDRPreReg(llvm::MCInst &Inst, unsigned Insn,
3018 uint64_t Address, const void *Decoder) {
3019 DecodeStatus S = MCDisassembler::Success;
3021 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3022 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3023 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3024 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3025 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3026 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3027 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3029 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3030 if (Rm == 0xF) S = MCDisassembler::SoftFail;
3032 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3033 return MCDisassembler::Fail;
3034 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3035 return MCDisassembler::Fail;
3036 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3037 return MCDisassembler::Fail;
3038 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3039 return MCDisassembler::Fail;
3045 static DecodeStatus DecodeSTRPreImm(llvm::MCInst &Inst, unsigned Insn,
3046 uint64_t Address, const void *Decoder) {
3047 DecodeStatus S = MCDisassembler::Success;
3049 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3050 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3051 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3052 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3053 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3054 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3056 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3058 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3059 return MCDisassembler::Fail;
3060 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3061 return MCDisassembler::Fail;
3062 if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
3063 return MCDisassembler::Fail;
3064 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3065 return MCDisassembler::Fail;
3070 static DecodeStatus DecodeSTRPreReg(llvm::MCInst &Inst, unsigned Insn,
3071 uint64_t Address, const void *Decoder) {
3072 DecodeStatus S = MCDisassembler::Success;
3074 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3075 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3076 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
3077 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
3078 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
3079 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3081 if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
3083 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3084 return MCDisassembler::Fail;
3085 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
3086 return MCDisassembler::Fail;
3087 if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
3088 return MCDisassembler::Fail;
3089 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3090 return MCDisassembler::Fail;
3095 static DecodeStatus DecodeVLD1LN(llvm::MCInst &Inst, unsigned Insn,
3096 uint64_t Address, const void *Decoder) {
3097 DecodeStatus S = MCDisassembler::Success;
3099 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3100 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3101 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3102 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3103 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3109 return MCDisassembler::Fail;
3111 if (fieldFromInstruction32(Insn, 4, 1))
3112 return MCDisassembler::Fail; // UNDEFINED
3113 index = fieldFromInstruction32(Insn, 5, 3);
3116 if (fieldFromInstruction32(Insn, 5, 1))
3117 return MCDisassembler::Fail; // UNDEFINED
3118 index = fieldFromInstruction32(Insn, 6, 2);
3119 if (fieldFromInstruction32(Insn, 4, 1))
3123 if (fieldFromInstruction32(Insn, 6, 1))
3124 return MCDisassembler::Fail; // UNDEFINED
3125 index = fieldFromInstruction32(Insn, 7, 1);
3126 if (fieldFromInstruction32(Insn, 4, 2) != 0)
3130 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3131 return MCDisassembler::Fail;
3132 if (Rm != 0xF) { // Writeback
3133 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3134 return MCDisassembler::Fail;
3136 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3137 return MCDisassembler::Fail;
3138 Inst.addOperand(MCOperand::CreateImm(align));
3141 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3142 return MCDisassembler::Fail;
3144 Inst.addOperand(MCOperand::CreateReg(0));
3147 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3148 return MCDisassembler::Fail;
3149 Inst.addOperand(MCOperand::CreateImm(index));
3154 static DecodeStatus DecodeVST1LN(llvm::MCInst &Inst, unsigned Insn,
3155 uint64_t Address, const void *Decoder) {
3156 DecodeStatus S = MCDisassembler::Success;
3158 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3159 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3160 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3161 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3162 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3168 return MCDisassembler::Fail;
3170 if (fieldFromInstruction32(Insn, 4, 1))
3171 return MCDisassembler::Fail; // UNDEFINED
3172 index = fieldFromInstruction32(Insn, 5, 3);
3175 if (fieldFromInstruction32(Insn, 5, 1))
3176 return MCDisassembler::Fail; // UNDEFINED
3177 index = fieldFromInstruction32(Insn, 6, 2);
3178 if (fieldFromInstruction32(Insn, 4, 1))
3182 if (fieldFromInstruction32(Insn, 6, 1))
3183 return MCDisassembler::Fail; // UNDEFINED
3184 index = fieldFromInstruction32(Insn, 7, 1);
3185 if (fieldFromInstruction32(Insn, 4, 2) != 0)
3189 if (Rm != 0xF) { // Writeback
3190 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3191 return MCDisassembler::Fail;
3193 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3194 return MCDisassembler::Fail;
3195 Inst.addOperand(MCOperand::CreateImm(align));
3198 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3199 return MCDisassembler::Fail;
3201 Inst.addOperand(MCOperand::CreateReg(0));
3204 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3205 return MCDisassembler::Fail;
3206 Inst.addOperand(MCOperand::CreateImm(index));
3212 static DecodeStatus DecodeVLD2LN(llvm::MCInst &Inst, unsigned Insn,
3213 uint64_t Address, const void *Decoder) {
3214 DecodeStatus S = MCDisassembler::Success;
3216 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3217 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3218 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3219 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3220 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3227 return MCDisassembler::Fail;
3229 index = fieldFromInstruction32(Insn, 5, 3);
3230 if (fieldFromInstruction32(Insn, 4, 1))
3234 index = fieldFromInstruction32(Insn, 6, 2);
3235 if (fieldFromInstruction32(Insn, 4, 1))
3237 if (fieldFromInstruction32(Insn, 5, 1))
3241 if (fieldFromInstruction32(Insn, 5, 1))
3242 return MCDisassembler::Fail; // UNDEFINED
3243 index = fieldFromInstruction32(Insn, 7, 1);
3244 if (fieldFromInstruction32(Insn, 4, 1) != 0)
3246 if (fieldFromInstruction32(Insn, 6, 1))
3251 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3252 return MCDisassembler::Fail;
3253 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3254 return MCDisassembler::Fail;
3255 if (Rm != 0xF) { // Writeback
3256 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3257 return MCDisassembler::Fail;
3259 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3260 return MCDisassembler::Fail;
3261 Inst.addOperand(MCOperand::CreateImm(align));
3264 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3265 return MCDisassembler::Fail;
3267 Inst.addOperand(MCOperand::CreateReg(0));
3270 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3271 return MCDisassembler::Fail;
3272 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3273 return MCDisassembler::Fail;
3274 Inst.addOperand(MCOperand::CreateImm(index));
3279 static DecodeStatus DecodeVST2LN(llvm::MCInst &Inst, unsigned Insn,
3280 uint64_t Address, const void *Decoder) {
3281 DecodeStatus S = MCDisassembler::Success;
3283 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3284 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3285 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3286 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3287 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3294 return MCDisassembler::Fail;
3296 index = fieldFromInstruction32(Insn, 5, 3);
3297 if (fieldFromInstruction32(Insn, 4, 1))
3301 index = fieldFromInstruction32(Insn, 6, 2);
3302 if (fieldFromInstruction32(Insn, 4, 1))
3304 if (fieldFromInstruction32(Insn, 5, 1))
3308 if (fieldFromInstruction32(Insn, 5, 1))
3309 return MCDisassembler::Fail; // UNDEFINED
3310 index = fieldFromInstruction32(Insn, 7, 1);
3311 if (fieldFromInstruction32(Insn, 4, 1) != 0)
3313 if (fieldFromInstruction32(Insn, 6, 1))
3318 if (Rm != 0xF) { // Writeback
3319 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3320 return MCDisassembler::Fail;
3322 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3323 return MCDisassembler::Fail;
3324 Inst.addOperand(MCOperand::CreateImm(align));
3327 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3328 return MCDisassembler::Fail;
3330 Inst.addOperand(MCOperand::CreateReg(0));
3333 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3334 return MCDisassembler::Fail;
3335 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3336 return MCDisassembler::Fail;
3337 Inst.addOperand(MCOperand::CreateImm(index));
3343 static DecodeStatus DecodeVLD3LN(llvm::MCInst &Inst, unsigned Insn,
3344 uint64_t Address, const void *Decoder) {
3345 DecodeStatus S = MCDisassembler::Success;
3347 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3348 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3349 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3350 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3351 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3358 return MCDisassembler::Fail;
3360 if (fieldFromInstruction32(Insn, 4, 1))
3361 return MCDisassembler::Fail; // UNDEFINED
3362 index = fieldFromInstruction32(Insn, 5, 3);
3365 if (fieldFromInstruction32(Insn, 4, 1))
3366 return MCDisassembler::Fail; // UNDEFINED
3367 index = fieldFromInstruction32(Insn, 6, 2);
3368 if (fieldFromInstruction32(Insn, 5, 1))
3372 if (fieldFromInstruction32(Insn, 4, 2))
3373 return MCDisassembler::Fail; // UNDEFINED
3374 index = fieldFromInstruction32(Insn, 7, 1);
3375 if (fieldFromInstruction32(Insn, 6, 1))
3380 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3381 return MCDisassembler::Fail;
3382 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3383 return MCDisassembler::Fail;
3384 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3385 return MCDisassembler::Fail;
3387 if (Rm != 0xF) { // Writeback
3388 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3389 return MCDisassembler::Fail;
3391 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3392 return MCDisassembler::Fail;
3393 Inst.addOperand(MCOperand::CreateImm(align));
3396 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3397 return MCDisassembler::Fail;
3399 Inst.addOperand(MCOperand::CreateReg(0));
3402 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3403 return MCDisassembler::Fail;
3404 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3405 return MCDisassembler::Fail;
3406 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3407 return MCDisassembler::Fail;
3408 Inst.addOperand(MCOperand::CreateImm(index));
3413 static DecodeStatus DecodeVST3LN(llvm::MCInst &Inst, unsigned Insn,
3414 uint64_t Address, const void *Decoder) {
3415 DecodeStatus S = MCDisassembler::Success;
3417 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3418 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3419 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3420 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3421 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3428 return MCDisassembler::Fail;
3430 if (fieldFromInstruction32(Insn, 4, 1))
3431 return MCDisassembler::Fail; // UNDEFINED
3432 index = fieldFromInstruction32(Insn, 5, 3);
3435 if (fieldFromInstruction32(Insn, 4, 1))
3436 return MCDisassembler::Fail; // UNDEFINED
3437 index = fieldFromInstruction32(Insn, 6, 2);
3438 if (fieldFromInstruction32(Insn, 5, 1))
3442 if (fieldFromInstruction32(Insn, 4, 2))
3443 return MCDisassembler::Fail; // UNDEFINED
3444 index = fieldFromInstruction32(Insn, 7, 1);
3445 if (fieldFromInstruction32(Insn, 6, 1))
3450 if (Rm != 0xF) { // Writeback
3451 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3452 return MCDisassembler::Fail;
3454 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3455 return MCDisassembler::Fail;
3456 Inst.addOperand(MCOperand::CreateImm(align));
3459 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3460 return MCDisassembler::Fail;
3462 Inst.addOperand(MCOperand::CreateReg(0));
3465 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3466 return MCDisassembler::Fail;
3467 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3468 return MCDisassembler::Fail;
3469 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3470 return MCDisassembler::Fail;
3471 Inst.addOperand(MCOperand::CreateImm(index));
3477 static DecodeStatus DecodeVLD4LN(llvm::MCInst &Inst, unsigned Insn,
3478 uint64_t Address, const void *Decoder) {
3479 DecodeStatus S = MCDisassembler::Success;
3481 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3482 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3483 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3484 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3485 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3492 return MCDisassembler::Fail;
3494 if (fieldFromInstruction32(Insn, 4, 1))
3496 index = fieldFromInstruction32(Insn, 5, 3);
3499 if (fieldFromInstruction32(Insn, 4, 1))
3501 index = fieldFromInstruction32(Insn, 6, 2);
3502 if (fieldFromInstruction32(Insn, 5, 1))
3506 if (fieldFromInstruction32(Insn, 4, 2))
3507 align = 4 << fieldFromInstruction32(Insn, 4, 2);
3508 index = fieldFromInstruction32(Insn, 7, 1);
3509 if (fieldFromInstruction32(Insn, 6, 1))
3514 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3515 return MCDisassembler::Fail;
3516 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3517 return MCDisassembler::Fail;
3518 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3519 return MCDisassembler::Fail;
3520 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3521 return MCDisassembler::Fail;
3523 if (Rm != 0xF) { // Writeback
3524 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3525 return MCDisassembler::Fail;
3527 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3528 return MCDisassembler::Fail;
3529 Inst.addOperand(MCOperand::CreateImm(align));
3532 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3533 return MCDisassembler::Fail;
3535 Inst.addOperand(MCOperand::CreateReg(0));
3538 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3539 return MCDisassembler::Fail;
3540 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3541 return MCDisassembler::Fail;
3542 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3543 return MCDisassembler::Fail;
3544 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3545 return MCDisassembler::Fail;
3546 Inst.addOperand(MCOperand::CreateImm(index));
3551 static DecodeStatus DecodeVST4LN(llvm::MCInst &Inst, unsigned Insn,
3552 uint64_t Address, const void *Decoder) {
3553 DecodeStatus S = MCDisassembler::Success;
3555 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3556 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3557 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3558 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3559 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3566 return MCDisassembler::Fail;
3568 if (fieldFromInstruction32(Insn, 4, 1))
3570 index = fieldFromInstruction32(Insn, 5, 3);
3573 if (fieldFromInstruction32(Insn, 4, 1))
3575 index = fieldFromInstruction32(Insn, 6, 2);
3576 if (fieldFromInstruction32(Insn, 5, 1))
3580 if (fieldFromInstruction32(Insn, 4, 2))
3581 align = 4 << fieldFromInstruction32(Insn, 4, 2);
3582 index = fieldFromInstruction32(Insn, 7, 1);
3583 if (fieldFromInstruction32(Insn, 6, 1))
3588 if (Rm != 0xF) { // Writeback
3589 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3590 return MCDisassembler::Fail;
3592 if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
3593 return MCDisassembler::Fail;
3594 Inst.addOperand(MCOperand::CreateImm(align));
3597 if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
3598 return MCDisassembler::Fail;
3600 Inst.addOperand(MCOperand::CreateReg(0));
3603 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
3604 return MCDisassembler::Fail;
3605 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
3606 return MCDisassembler::Fail;
3607 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
3608 return MCDisassembler::Fail;
3609 if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
3610 return MCDisassembler::Fail;
3611 Inst.addOperand(MCOperand::CreateImm(index));
3616 static DecodeStatus DecodeVMOVSRR(llvm::MCInst &Inst, unsigned Insn,
3617 uint64_t Address, const void *Decoder) {
3618 DecodeStatus S = MCDisassembler::Success;
3619 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3620 unsigned Rt2 = fieldFromInstruction32(Insn, 16, 4);
3621 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3622 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3623 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
3625 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
3626 S = MCDisassembler::SoftFail;
3628 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
3629 return MCDisassembler::Fail;
3630 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
3631 return MCDisassembler::Fail;
3632 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
3633 return MCDisassembler::Fail;
3634 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
3635 return MCDisassembler::Fail;
3636 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3637 return MCDisassembler::Fail;
3642 static DecodeStatus DecodeVMOVRRS(llvm::MCInst &Inst, unsigned Insn,
3643 uint64_t Address, const void *Decoder) {
3644 DecodeStatus S = MCDisassembler::Success;
3645 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3646 unsigned Rt2 = fieldFromInstruction32(Insn, 16, 4);
3647 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3648 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
3649 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
3651 if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
3652 S = MCDisassembler::SoftFail;
3654 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
3655 return MCDisassembler::Fail;
3656 if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
3657 return MCDisassembler::Fail;
3658 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
3659 return MCDisassembler::Fail;
3660 if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
3661 return MCDisassembler::Fail;
3662 if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
3663 return MCDisassembler::Fail;
3668 static DecodeStatus DecodeIT(llvm::MCInst &Inst, unsigned Insn,
3669 uint64_t Address, const void *Decoder) {
3670 DecodeStatus S = MCDisassembler::Success;
3671 unsigned pred = fieldFromInstruction16(Insn, 4, 4);
3672 // The InstPrinter needs to have the low bit of the predicate in
3673 // the mask operand to be able to print it properly.
3674 unsigned mask = fieldFromInstruction16(Insn, 0, 5);
3678 S = MCDisassembler::SoftFail;
3681 if ((mask & 0xF) == 0) {
3682 // Preserve the high bit of the mask, which is the low bit of
3686 S = MCDisassembler::SoftFail;
3689 Inst.addOperand(MCOperand::CreateImm(pred));
3690 Inst.addOperand(MCOperand::CreateImm(mask));
3695 DecodeT2LDRDPreInstruction(llvm::MCInst &Inst, unsigned Insn,
3696 uint64_t Address, const void *Decoder) {
3697 DecodeStatus S = MCDisassembler::Success;
3699 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3700 unsigned Rt2 = fieldFromInstruction32(Insn, 8, 4);
3701 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3702 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
3703 unsigned W = fieldFromInstruction32(Insn, 21, 1);
3704 unsigned U = fieldFromInstruction32(Insn, 23, 1);
3705 unsigned P = fieldFromInstruction32(Insn, 24, 1);
3706 bool writeback = (W == 1) | (P == 0);
3708 addr |= (U << 8) | (Rn << 9);
3710 if (writeback && (Rn == Rt || Rn == Rt2))
3711 Check(S, MCDisassembler::SoftFail);
3713 Check(S, MCDisassembler::SoftFail);
3716 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3717 return MCDisassembler::Fail;
3719 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
3720 return MCDisassembler::Fail;
3721 // Writeback operand
3722 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
3723 return MCDisassembler::Fail;
3725 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
3726 return MCDisassembler::Fail;
3732 DecodeT2STRDPreInstruction(llvm::MCInst &Inst, unsigned Insn,
3733 uint64_t Address, const void *Decoder) {
3734 DecodeStatus S = MCDisassembler::Success;
3736 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
3737 unsigned Rt2 = fieldFromInstruction32(Insn, 8, 4);
3738 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3739 unsigned addr = fieldFromInstruction32(Insn, 0, 8);
3740 unsigned W = fieldFromInstruction32(Insn, 21, 1);
3741 unsigned U = fieldFromInstruction32(Insn, 23, 1);
3742 unsigned P = fieldFromInstruction32(Insn, 24, 1);
3743 bool writeback = (W == 1) | (P == 0);
3745 addr |= (U << 8) | (Rn << 9);
3747 if (writeback && (Rn == Rt || Rn == Rt2))
3748 Check(S, MCDisassembler::SoftFail);
3750 // Writeback operand
3751 if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
3752 return MCDisassembler::Fail;
3754 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
3755 return MCDisassembler::Fail;
3757 if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
3758 return MCDisassembler::Fail;
3760 if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
3761 return MCDisassembler::Fail;