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"
12 #include "ARMDisassembler.h"
14 #include "ARMRegisterInfo.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/Target/TargetRegistry.h"
22 #include "llvm/Support/Debug.h"
23 #include "llvm/Support/MemoryObject.h"
24 #include "llvm/Support/ErrorHandling.h"
25 #include "llvm/Support/raw_ostream.h"
27 // Pull DecodeStatus and its enum values into the global namespace.
28 typedef llvm::MCDisassembler::DecodeStatus DecodeStatus;
29 #define Success llvm::MCDisassembler::Success
30 #define Unpredictable llvm::MCDisassembler::SoftFail
31 #define Fail llvm::MCDisassembler::Fail
33 // Helper macro to perform setwise reduction of the current running status
34 // and another status, and return if the new status is Fail.
35 #define CHECK(S,X) do { \
36 S = (DecodeStatus) ((int)S & (X)); \
37 if (S == Fail) return Fail; \
40 // Forward declare these because the autogenerated code will reference them.
41 // Definitions are further down.
42 static DecodeStatus DecodeGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
43 uint64_t Address, const void *Decoder);
44 static DecodeStatus DecodeGPRnopcRegisterClass(llvm::MCInst &Inst,
45 unsigned RegNo, uint64_t Address,
47 static DecodeStatus DecodetGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
48 uint64_t Address, const void *Decoder);
49 static DecodeStatus DecodetcGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
50 uint64_t Address, const void *Decoder);
51 static DecodeStatus DecoderGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
52 uint64_t Address, const void *Decoder);
53 static DecodeStatus DecodeSPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
54 uint64_t Address, const void *Decoder);
55 static DecodeStatus DecodeDPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
56 uint64_t Address, const void *Decoder);
57 static DecodeStatus DecodeDPR_8RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
58 uint64_t Address, const void *Decoder);
59 static DecodeStatus DecodeDPR_VFP2RegisterClass(llvm::MCInst &Inst,
63 static DecodeStatus DecodeQPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
64 uint64_t Address, const void *Decoder);
66 static DecodeStatus DecodePredicateOperand(llvm::MCInst &Inst, unsigned Val,
67 uint64_t Address, const void *Decoder);
68 static DecodeStatus DecodeCCOutOperand(llvm::MCInst &Inst, unsigned Val,
69 uint64_t Address, const void *Decoder);
70 static DecodeStatus DecodeSOImmOperand(llvm::MCInst &Inst, unsigned Val,
71 uint64_t Address, const void *Decoder);
72 static DecodeStatus DecodeBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
73 uint64_t Address, const void *Decoder);
74 static DecodeStatus DecodeRegListOperand(llvm::MCInst &Inst, unsigned Val,
75 uint64_t Address, const void *Decoder);
76 static DecodeStatus DecodeSPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
77 uint64_t Address, const void *Decoder);
78 static DecodeStatus DecodeDPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
79 uint64_t Address, const void *Decoder);
81 static DecodeStatus DecodeBitfieldMaskOperand(llvm::MCInst &Inst, unsigned Insn,
82 uint64_t Address, const void *Decoder);
83 static DecodeStatus DecodeCopMemInstruction(llvm::MCInst &Inst, unsigned Insn,
84 uint64_t Address, const void *Decoder);
85 static DecodeStatus DecodeAddrMode2IdxInstruction(llvm::MCInst &Inst,
89 static DecodeStatus DecodeSORegMemOperand(llvm::MCInst &Inst, unsigned Insn,
90 uint64_t Address, const void *Decoder);
91 static DecodeStatus DecodeAddrMode3Instruction(llvm::MCInst &Inst,unsigned Insn,
92 uint64_t Address, const void *Decoder);
93 static DecodeStatus DecodeSORegImmOperand(llvm::MCInst &Inst, unsigned Insn,
94 uint64_t Address, const void *Decoder);
95 static DecodeStatus DecodeSORegRegOperand(llvm::MCInst &Inst, unsigned Insn,
96 uint64_t Address, const void *Decoder);
98 static DecodeStatus DecodeMemMultipleWritebackInstruction(llvm::MCInst & Inst,
101 const void *Decoder);
102 static DecodeStatus DecodeSMLAInstruction(llvm::MCInst &Inst, unsigned Insn,
103 uint64_t Address, const void *Decoder);
104 static DecodeStatus DecodeCPSInstruction(llvm::MCInst &Inst, unsigned Insn,
105 uint64_t Address, const void *Decoder);
106 static DecodeStatus DecodeAddrModeImm12Operand(llvm::MCInst &Inst, unsigned Val,
107 uint64_t Address, const void *Decoder);
108 static DecodeStatus DecodeAddrMode5Operand(llvm::MCInst &Inst, unsigned Val,
109 uint64_t Address, const void *Decoder);
110 static DecodeStatus DecodeAddrMode7Operand(llvm::MCInst &Inst, unsigned Val,
111 uint64_t Address, const void *Decoder);
112 static DecodeStatus DecodeBranchImmInstruction(llvm::MCInst &Inst,unsigned Insn,
113 uint64_t Address, const void *Decoder);
114 static DecodeStatus DecodeVCVTImmOperand(llvm::MCInst &Inst, unsigned Val,
115 uint64_t Address, const void *Decoder);
116 static DecodeStatus DecodeAddrMode6Operand(llvm::MCInst &Inst, unsigned Val,
117 uint64_t Address, const void *Decoder);
118 static DecodeStatus DecodeVLDInstruction(llvm::MCInst &Inst, unsigned Val,
119 uint64_t Address, const void *Decoder);
120 static DecodeStatus DecodeVSTInstruction(llvm::MCInst &Inst, unsigned Val,
121 uint64_t Address, const void *Decoder);
122 static DecodeStatus DecodeVLD1DupInstruction(llvm::MCInst &Inst, unsigned Val,
123 uint64_t Address, const void *Decoder);
124 static DecodeStatus DecodeVLD2DupInstruction(llvm::MCInst &Inst, unsigned Val,
125 uint64_t Address, const void *Decoder);
126 static DecodeStatus DecodeVLD3DupInstruction(llvm::MCInst &Inst, unsigned Val,
127 uint64_t Address, const void *Decoder);
128 static DecodeStatus DecodeVLD4DupInstruction(llvm::MCInst &Inst, unsigned Val,
129 uint64_t Address, const void *Decoder);
130 static DecodeStatus DecodeNEONModImmInstruction(llvm::MCInst &Inst,unsigned Val,
131 uint64_t Address, const void *Decoder);
132 static DecodeStatus DecodeVSHLMaxInstruction(llvm::MCInst &Inst, unsigned Val,
133 uint64_t Address, const void *Decoder);
134 static DecodeStatus DecodeShiftRight8Imm(llvm::MCInst &Inst, unsigned Val,
135 uint64_t Address, const void *Decoder);
136 static DecodeStatus DecodeShiftRight16Imm(llvm::MCInst &Inst, unsigned Val,
137 uint64_t Address, const void *Decoder);
138 static DecodeStatus DecodeShiftRight32Imm(llvm::MCInst &Inst, unsigned Val,
139 uint64_t Address, const void *Decoder);
140 static DecodeStatus DecodeShiftRight64Imm(llvm::MCInst &Inst, unsigned Val,
141 uint64_t Address, const void *Decoder);
142 static DecodeStatus DecodeTBLInstruction(llvm::MCInst &Inst, unsigned Insn,
143 uint64_t Address, const void *Decoder);
144 static DecodeStatus DecodeVFPfpImm(llvm::MCInst &Inst, unsigned Val,
145 uint64_t Address, const void *Decoder);
146 static DecodeStatus DecodePostIdxReg(llvm::MCInst &Inst, unsigned Insn,
147 uint64_t Address, const void *Decoder);
148 static DecodeStatus DecodeCoprocessor(llvm::MCInst &Inst, unsigned Insn,
149 uint64_t Address, const void *Decoder);
150 static DecodeStatus DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Insn,
151 uint64_t Address, const void *Decoder);
152 static DecodeStatus DecodeMSRMask(llvm::MCInst &Inst, unsigned Insn,
153 uint64_t Address, const void *Decoder);
154 static DecodeStatus DecodeDoubleRegLoad(llvm::MCInst &Inst, unsigned Insn,
155 uint64_t Address, const void *Decoder);
156 static DecodeStatus DecodeDoubleRegStore(llvm::MCInst &Inst, unsigned Insn,
157 uint64_t Address, const void *Decoder);
158 static DecodeStatus DecodeSTRPreImm(llvm::MCInst &Inst, unsigned Insn,
159 uint64_t Address, const void *Decoder);
160 static DecodeStatus DecodeSTRPreReg(llvm::MCInst &Inst, unsigned Insn,
161 uint64_t Address, const void *Decoder);
162 static DecodeStatus DecodeVLD1LN(llvm::MCInst &Inst, unsigned Insn,
163 uint64_t Address, const void *Decoder);
164 static DecodeStatus DecodeVLD2LN(llvm::MCInst &Inst, unsigned Insn,
165 uint64_t Address, const void *Decoder);
166 static DecodeStatus DecodeVLD3LN(llvm::MCInst &Inst, unsigned Insn,
167 uint64_t Address, const void *Decoder);
168 static DecodeStatus DecodeVLD4LN(llvm::MCInst &Inst, unsigned Insn,
169 uint64_t Address, const void *Decoder);
170 static DecodeStatus DecodeVST1LN(llvm::MCInst &Inst, unsigned Insn,
171 uint64_t Address, const void *Decoder);
172 static DecodeStatus DecodeVST2LN(llvm::MCInst &Inst, unsigned Insn,
173 uint64_t Address, const void *Decoder);
174 static DecodeStatus DecodeVST3LN(llvm::MCInst &Inst, unsigned Insn,
175 uint64_t Address, const void *Decoder);
176 static DecodeStatus DecodeVST4LN(llvm::MCInst &Inst, unsigned Insn,
177 uint64_t Address, const void *Decoder);
180 static DecodeStatus DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn,
181 uint64_t Address, const void *Decoder);
182 static DecodeStatus DecodeThumbBROperand(llvm::MCInst &Inst, unsigned Val,
183 uint64_t Address, const void *Decoder);
184 static DecodeStatus DecodeT2BROperand(llvm::MCInst &Inst, unsigned Val,
185 uint64_t Address, const void *Decoder);
186 static DecodeStatus DecodeThumbCmpBROperand(llvm::MCInst &Inst, unsigned Val,
187 uint64_t Address, const void *Decoder);
188 static DecodeStatus DecodeThumbAddrModeRR(llvm::MCInst &Inst, unsigned Val,
189 uint64_t Address, const void *Decoder);
190 static DecodeStatus DecodeThumbAddrModeIS(llvm::MCInst &Inst, unsigned Val,
191 uint64_t Address, const void *Decoder);
192 static DecodeStatus DecodeThumbAddrModePC(llvm::MCInst &Inst, unsigned Val,
193 uint64_t Address, const void *Decoder);
194 static DecodeStatus DecodeThumbAddrModeSP(llvm::MCInst &Inst, unsigned Val,
195 uint64_t Address, const void *Decoder);
196 static DecodeStatus DecodeT2AddrModeSOReg(llvm::MCInst &Inst, unsigned Val,
197 uint64_t Address, const void *Decoder);
198 static DecodeStatus DecodeT2LoadShift(llvm::MCInst &Inst, unsigned Val,
199 uint64_t Address, const void *Decoder);
200 static DecodeStatus DecodeT2Imm8S4(llvm::MCInst &Inst, unsigned Val,
201 uint64_t Address, const void *Decoder);
202 static DecodeStatus DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val,
203 uint64_t Address, const void *Decoder);
204 static DecodeStatus DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
205 uint64_t Address, const void *Decoder);
206 static DecodeStatus DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val,
207 uint64_t Address, const void *Decoder);
208 static DecodeStatus DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Val,
209 uint64_t Address, const void *Decoder);
210 static DecodeStatus DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn,
211 uint64_t Address, const void *Decoder);
212 static DecodeStatus DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn,
213 uint64_t Address, const void *Decoder);
214 static DecodeStatus DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Insn,
215 uint64_t Address, const void *Decoder);
216 static DecodeStatus DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val,
217 uint64_t Address, const void *Decoder);
218 static DecodeStatus DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Val,
219 uint64_t Address, const void *Decoder);
220 static DecodeStatus DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val,
221 uint64_t Address, const void *Decoder);
222 static DecodeStatus DecodeThumbBCCTargetOperand(llvm::MCInst &Inst,unsigned Val,
223 uint64_t Address, const void *Decoder);
224 static DecodeStatus DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
225 uint64_t Address, const void *Decoder);
227 #include "ARMGenDisassemblerTables.inc"
228 #include "ARMGenInstrInfo.inc"
229 #include "ARMGenEDInfo.inc"
231 using namespace llvm;
233 static MCDisassembler *createARMDisassembler(const Target &T) {
234 return new ARMDisassembler;
237 static MCDisassembler *createThumbDisassembler(const Target &T) {
238 return new ThumbDisassembler;
241 EDInstInfo *ARMDisassembler::getEDInfo() const {
245 EDInstInfo *ThumbDisassembler::getEDInfo() const {
249 DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
250 const MemoryObject &Region,
252 raw_ostream &os) const {
255 // We want to read exactly 4 bytes of data.
256 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1)
259 // Encoded as a small-endian 32-bit word in the stream.
260 uint32_t insn = (bytes[3] << 24) |
265 // Calling the auto-generated decoder function.
266 DecodeStatus result = decodeARMInstruction32(MI, insn, Address, this);
267 if (result != Fail) {
272 // Instructions that are shared between ARM and Thumb modes.
273 // FIXME: This shouldn't really exist. It's an artifact of the
274 // fact that we fail to encode a few instructions properly for Thumb.
276 result = decodeCommonInstruction32(MI, insn, Address, this);
277 if (result != Fail) {
282 // VFP and NEON instructions, similarly, are shared between ARM
285 result = decodeVFPInstruction32(MI, insn, Address, this);
286 if (result != Fail) {
292 result = decodeNEONDataInstruction32(MI, insn, Address, this);
293 if (result != Fail) {
295 // Add a fake predicate operand, because we share these instruction
296 // definitions with Thumb2 where these instructions are predicable.
297 if (!DecodePredicateOperand(MI, 0xE, Address, this)) return Fail;
302 result = decodeNEONLoadStoreInstruction32(MI, insn, Address, this);
303 if (result != Fail) {
305 // Add a fake predicate operand, because we share these instruction
306 // definitions with Thumb2 where these instructions are predicable.
307 if (!DecodePredicateOperand(MI, 0xE, Address, this)) return Fail;
312 result = decodeNEONDupInstruction32(MI, insn, Address, this);
313 if (result != Fail) {
315 // Add a fake predicate operand, because we share these instruction
316 // definitions with Thumb2 where these instructions are predicable.
317 if (!DecodePredicateOperand(MI, 0xE, Address, this)) return Fail;
327 extern MCInstrDesc ARMInsts[];
330 // Thumb1 instructions don't have explicit S bits. Rather, they
331 // implicitly set CPSR. Since it's not represented in the encoding, the
332 // auto-generated decoder won't inject the CPSR operand. We need to fix
333 // that as a post-pass.
334 static void AddThumb1SBit(MCInst &MI, bool InITBlock) {
335 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
336 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
337 MCInst::iterator I = MI.begin();
338 for (unsigned i = 0; i < NumOps; ++i, ++I) {
339 if (I == MI.end()) break;
340 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) {
341 if (i > 0 && OpInfo[i-1].isPredicate()) continue;
342 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
347 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
350 // Most Thumb instructions don't have explicit predicates in the
351 // encoding, but rather get their predicates from IT context. We need
352 // to fix up the predicate operands using this context information as a
354 void ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
355 // A few instructions actually have predicates encoded in them. Don't
356 // try to overwrite it if we're seeing one of those.
357 switch (MI.getOpcode()) {
365 // If we're in an IT block, base the predicate on that. Otherwise,
366 // assume a predicate of AL.
368 if (!ITBlock.empty()) {
374 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
375 unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
376 MCInst::iterator I = MI.begin();
377 for (unsigned i = 0; i < NumOps; ++i, ++I) {
378 if (I == MI.end()) break;
379 if (OpInfo[i].isPredicate()) {
380 I = MI.insert(I, MCOperand::CreateImm(CC));
383 MI.insert(I, MCOperand::CreateReg(0));
385 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
390 I = MI.insert(I, MCOperand::CreateImm(CC));
393 MI.insert(I, MCOperand::CreateReg(0));
395 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
398 // Thumb VFP instructions are a special case. Because we share their
399 // encodings between ARM and Thumb modes, and they are predicable in ARM
400 // mode, the auto-generated decoder will give them an (incorrect)
401 // predicate operand. We need to rewrite these operands based on the IT
402 // context as a post-pass.
403 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
405 if (!ITBlock.empty()) {
411 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
412 MCInst::iterator I = MI.begin();
413 for (unsigned i = 0, e = MI.size(); i < e; ++i, ++I) {
414 if (OpInfo[i].isPredicate() ) {
420 I->setReg(ARM::CPSR);
426 DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
427 const MemoryObject &Region,
429 raw_ostream &os) const {
432 // We want to read exactly 2 bytes of data.
433 if (Region.readBytes(Address, 2, (uint8_t*)bytes, NULL) == -1)
436 uint16_t insn16 = (bytes[1] << 8) | bytes[0];
437 DecodeStatus result = decodeThumbInstruction16(MI, insn16, Address, this);
438 if (result != Fail) {
440 AddThumbPredicate(MI);
445 result = decodeThumbSBitInstruction16(MI, insn16, Address, this);
448 bool InITBlock = !ITBlock.empty();
449 AddThumbPredicate(MI);
450 AddThumb1SBit(MI, InITBlock);
455 result = decodeThumb2Instruction16(MI, insn16, Address, this);
456 if (result != Fail) {
458 AddThumbPredicate(MI);
460 // If we find an IT instruction, we need to parse its condition
461 // code and mask operands so that we can apply them correctly
462 // to the subsequent instructions.
463 if (MI.getOpcode() == ARM::t2IT) {
464 unsigned firstcond = MI.getOperand(0).getImm();
465 uint32_t mask = MI.getOperand(1).getImm();
466 unsigned zeros = CountTrailingZeros_32(mask);
469 for (unsigned i = 0; i < 4 - (zeros+1); ++i) {
470 if (firstcond ^ (mask & 1))
471 ITBlock.push_back(firstcond ^ 1);
473 ITBlock.push_back(firstcond);
476 ITBlock.push_back(firstcond);
482 // We want to read exactly 4 bytes of data.
483 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1)
486 uint32_t insn32 = (bytes[3] << 8) |
491 result = decodeThumbInstruction32(MI, insn32, Address, this);
492 if (result != Fail) {
494 bool InITBlock = ITBlock.size();
495 AddThumbPredicate(MI);
496 AddThumb1SBit(MI, InITBlock);
501 result = decodeThumb2Instruction32(MI, insn32, Address, this);
502 if (result != Fail) {
504 AddThumbPredicate(MI);
509 result = decodeCommonInstruction32(MI, insn32, Address, this);
510 if (result != Fail) {
512 AddThumbPredicate(MI);
517 result = decodeVFPInstruction32(MI, insn32, Address, this);
518 if (result != Fail) {
520 UpdateThumbVFPPredicate(MI);
525 result = decodeNEONDupInstruction32(MI, insn32, Address, this);
526 if (result != Fail) {
528 AddThumbPredicate(MI);
532 if (fieldFromInstruction32(insn32, 24, 8) == 0xF9) {
534 uint32_t NEONLdStInsn = insn32;
535 NEONLdStInsn &= 0xF0FFFFFF;
536 NEONLdStInsn |= 0x04000000;
537 result = decodeNEONLoadStoreInstruction32(MI, NEONLdStInsn, Address, this);
538 if (result != Fail) {
540 AddThumbPredicate(MI);
545 if (fieldFromInstruction32(insn32, 24, 4) == 0xF) {
547 uint32_t NEONDataInsn = insn32;
548 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
549 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
550 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
551 result = decodeNEONDataInstruction32(MI, NEONDataInsn, Address, this);
552 if (result != Fail) {
554 AddThumbPredicate(MI);
563 extern "C" void LLVMInitializeARMDisassembler() {
564 TargetRegistry::RegisterMCDisassembler(TheARMTarget,
565 createARMDisassembler);
566 TargetRegistry::RegisterMCDisassembler(TheThumbTarget,
567 createThumbDisassembler);
570 static const unsigned GPRDecoderTable[] = {
571 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
572 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
573 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
574 ARM::R12, ARM::SP, ARM::LR, ARM::PC
577 static DecodeStatus DecodeGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
578 uint64_t Address, const void *Decoder) {
582 unsigned Register = GPRDecoderTable[RegNo];
583 Inst.addOperand(MCOperand::CreateReg(Register));
588 DecodeGPRnopcRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
589 uint64_t Address, const void *Decoder) {
590 if (RegNo == 15) return Fail;
591 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
594 static DecodeStatus DecodetGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
595 uint64_t Address, const void *Decoder) {
598 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
601 static DecodeStatus DecodetcGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
602 uint64_t Address, const void *Decoder) {
603 unsigned Register = 0;
627 Inst.addOperand(MCOperand::CreateReg(Register));
631 static DecodeStatus DecoderGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
632 uint64_t Address, const void *Decoder) {
633 if (RegNo == 13 || RegNo == 15) return Fail;
634 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
637 static const unsigned SPRDecoderTable[] = {
638 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
639 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
640 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
641 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
642 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
643 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
644 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
645 ARM::S28, ARM::S29, ARM::S30, ARM::S31
648 static DecodeStatus DecodeSPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
649 uint64_t Address, const void *Decoder) {
653 unsigned Register = SPRDecoderTable[RegNo];
654 Inst.addOperand(MCOperand::CreateReg(Register));
658 static const unsigned DPRDecoderTable[] = {
659 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
660 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
661 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
662 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
663 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
664 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
665 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
666 ARM::D28, ARM::D29, ARM::D30, ARM::D31
669 static DecodeStatus DecodeDPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
670 uint64_t Address, const void *Decoder) {
674 unsigned Register = DPRDecoderTable[RegNo];
675 Inst.addOperand(MCOperand::CreateReg(Register));
679 static DecodeStatus DecodeDPR_8RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
680 uint64_t Address, const void *Decoder) {
683 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
687 DecodeDPR_VFP2RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
688 uint64_t Address, const void *Decoder) {
691 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
694 static const unsigned QPRDecoderTable[] = {
695 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
696 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
697 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
698 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
702 static DecodeStatus DecodeQPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
703 uint64_t Address, const void *Decoder) {
708 unsigned Register = QPRDecoderTable[RegNo];
709 Inst.addOperand(MCOperand::CreateReg(Register));
713 static DecodeStatus DecodePredicateOperand(llvm::MCInst &Inst, unsigned Val,
714 uint64_t Address, const void *Decoder) {
715 if (Val == 0xF) return Fail;
716 // AL predicate is not allowed on Thumb1 branches.
717 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
719 Inst.addOperand(MCOperand::CreateImm(Val));
720 if (Val == ARMCC::AL) {
721 Inst.addOperand(MCOperand::CreateReg(0));
723 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
727 static DecodeStatus DecodeCCOutOperand(llvm::MCInst &Inst, unsigned Val,
728 uint64_t Address, const void *Decoder) {
730 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
732 Inst.addOperand(MCOperand::CreateReg(0));
736 static DecodeStatus DecodeSOImmOperand(llvm::MCInst &Inst, unsigned Val,
737 uint64_t Address, const void *Decoder) {
738 uint32_t imm = Val & 0xFF;
739 uint32_t rot = (Val & 0xF00) >> 7;
740 uint32_t rot_imm = (imm >> rot) | (imm << (32-rot));
741 Inst.addOperand(MCOperand::CreateImm(rot_imm));
745 static DecodeStatus DecodeBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
746 uint64_t Address, const void *Decoder) {
748 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(Val)));
752 static DecodeStatus DecodeSORegImmOperand(llvm::MCInst &Inst, unsigned Val,
753 uint64_t Address, const void *Decoder) {
754 DecodeStatus S = Success;
756 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
757 unsigned type = fieldFromInstruction32(Val, 5, 2);
758 unsigned imm = fieldFromInstruction32(Val, 7, 5);
760 // Register-immediate
761 CHECK(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder));
763 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
779 if (Shift == ARM_AM::ror && imm == 0)
782 unsigned Op = Shift | (imm << 3);
783 Inst.addOperand(MCOperand::CreateImm(Op));
788 static DecodeStatus DecodeSORegRegOperand(llvm::MCInst &Inst, unsigned Val,
789 uint64_t Address, const void *Decoder) {
790 DecodeStatus S = Success;
792 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
793 unsigned type = fieldFromInstruction32(Val, 5, 2);
794 unsigned Rs = fieldFromInstruction32(Val, 8, 4);
797 CHECK(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder));
798 CHECK(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder));
800 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
816 Inst.addOperand(MCOperand::CreateImm(Shift));
821 static DecodeStatus DecodeRegListOperand(llvm::MCInst &Inst, unsigned Val,
822 uint64_t Address, const void *Decoder) {
823 DecodeStatus S = Success;
825 // Empty register lists are not allowed.
826 if (CountPopulation_32(Val) == 0) return Fail;
827 for (unsigned i = 0; i < 16; ++i) {
828 if (Val & (1 << i)) {
829 CHECK(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder));
836 static DecodeStatus DecodeSPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
837 uint64_t Address, const void *Decoder) {
838 DecodeStatus S = Success;
840 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
841 unsigned regs = Val & 0xFF;
843 CHECK(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder));
844 for (unsigned i = 0; i < (regs - 1); ++i) {
845 CHECK(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder));
851 static DecodeStatus DecodeDPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
852 uint64_t Address, const void *Decoder) {
853 DecodeStatus S = Success;
855 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
856 unsigned regs = (Val & 0xFF) / 2;
858 CHECK(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder));
859 for (unsigned i = 0; i < (regs - 1); ++i) {
860 CHECK(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder));
866 static DecodeStatus DecodeBitfieldMaskOperand(llvm::MCInst &Inst, unsigned Val,
867 uint64_t Address, const void *Decoder) {
868 // This operand encodes a mask of contiguous zeros between a specified MSB
869 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
870 // the mask of all bits LSB-and-lower, and then xor them to create
871 // the mask of that's all ones on [msb, lsb]. Finally we not it to
872 // create the final mask.
873 unsigned msb = fieldFromInstruction32(Val, 5, 5);
874 unsigned lsb = fieldFromInstruction32(Val, 0, 5);
875 uint32_t msb_mask = (1 << (msb+1)) - 1;
876 uint32_t lsb_mask = (1 << lsb) - 1;
877 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
881 static DecodeStatus DecodeCopMemInstruction(llvm::MCInst &Inst, unsigned Insn,
882 uint64_t Address, const void *Decoder) {
883 DecodeStatus S = Success;
885 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
886 unsigned CRd = fieldFromInstruction32(Insn, 12, 4);
887 unsigned coproc = fieldFromInstruction32(Insn, 8, 4);
888 unsigned imm = fieldFromInstruction32(Insn, 0, 8);
889 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
890 unsigned U = fieldFromInstruction32(Insn, 23, 1);
892 switch (Inst.getOpcode()) {
893 case ARM::LDC_OFFSET:
896 case ARM::LDC_OPTION:
897 case ARM::LDCL_OFFSET:
900 case ARM::LDCL_OPTION:
901 case ARM::STC_OFFSET:
904 case ARM::STC_OPTION:
905 case ARM::STCL_OFFSET:
908 case ARM::STCL_OPTION:
909 if (coproc == 0xA || coproc == 0xB)
916 Inst.addOperand(MCOperand::CreateImm(coproc));
917 Inst.addOperand(MCOperand::CreateImm(CRd));
918 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
919 switch (Inst.getOpcode()) {
920 case ARM::LDC_OPTION:
921 case ARM::LDCL_OPTION:
922 case ARM::LDC2_OPTION:
923 case ARM::LDC2L_OPTION:
924 case ARM::STC_OPTION:
925 case ARM::STCL_OPTION:
926 case ARM::STC2_OPTION:
927 case ARM::STC2L_OPTION:
930 case ARM::LDC2L_POST:
931 case ARM::STC2L_POST:
934 Inst.addOperand(MCOperand::CreateReg(0));
938 unsigned P = fieldFromInstruction32(Insn, 24, 1);
939 unsigned W = fieldFromInstruction32(Insn, 21, 1);
941 bool writeback = (P == 0) || (W == 1);
942 unsigned idx_mode = 0;
944 idx_mode = ARMII::IndexModePre;
945 else if (!P && writeback)
946 idx_mode = ARMII::IndexModePost;
948 switch (Inst.getOpcode()) {
951 case ARM::LDC2L_POST:
952 case ARM::STC2L_POST:
954 case ARM::LDC_OPTION:
955 case ARM::LDCL_OPTION:
956 case ARM::LDC2_OPTION:
957 case ARM::LDC2L_OPTION:
958 case ARM::STC_OPTION:
959 case ARM::STCL_OPTION:
960 case ARM::STC2_OPTION:
961 case ARM::STC2L_OPTION:
962 Inst.addOperand(MCOperand::CreateImm(imm));
966 Inst.addOperand(MCOperand::CreateImm(
967 ARM_AM::getAM2Opc(ARM_AM::add, imm, ARM_AM::lsl, idx_mode)));
969 Inst.addOperand(MCOperand::CreateImm(
970 ARM_AM::getAM2Opc(ARM_AM::sub, imm, ARM_AM::lsl, idx_mode)));
974 switch (Inst.getOpcode()) {
975 case ARM::LDC_OFFSET:
978 case ARM::LDC_OPTION:
979 case ARM::LDCL_OFFSET:
982 case ARM::LDCL_OPTION:
983 case ARM::STC_OFFSET:
986 case ARM::STC_OPTION:
987 case ARM::STCL_OFFSET:
990 case ARM::STCL_OPTION:
991 CHECK(S, DecodePredicateOperand(Inst, pred, Address, Decoder));
1001 DecodeAddrMode2IdxInstruction(llvm::MCInst &Inst, unsigned Insn,
1002 uint64_t Address, const void *Decoder) {
1003 DecodeStatus S = Success;
1005 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1006 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1007 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1008 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
1009 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1010 unsigned reg = fieldFromInstruction32(Insn, 25, 1);
1011 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1012 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1014 // On stores, the writeback operand precedes Rt.
1015 switch (Inst.getOpcode()) {
1016 case ARM::STR_POST_IMM:
1017 case ARM::STR_POST_REG:
1018 case ARM::STRB_POST_IMM:
1019 case ARM::STRB_POST_REG:
1020 case ARM::STRT_POST_REG:
1021 case ARM::STRT_POST_IMM:
1022 case ARM::STRBT_POST_REG:
1023 case ARM::STRBT_POST_IMM:
1024 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
1030 CHECK(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder));
1032 // On loads, the writeback operand comes after Rt.
1033 switch (Inst.getOpcode()) {
1034 case ARM::LDR_POST_IMM:
1035 case ARM::LDR_POST_REG:
1036 case ARM::LDRB_POST_IMM:
1037 case ARM::LDRB_POST_REG:
1040 case ARM::LDRBT_POST_REG:
1041 case ARM::LDRBT_POST_IMM:
1042 case ARM::LDRT_POST_REG:
1043 case ARM::LDRT_POST_IMM:
1044 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
1050 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
1052 ARM_AM::AddrOpc Op = ARM_AM::add;
1053 if (!fieldFromInstruction32(Insn, 23, 1))
1056 bool writeback = (P == 0) || (W == 1);
1057 unsigned idx_mode = 0;
1059 idx_mode = ARMII::IndexModePre;
1060 else if (!P && writeback)
1061 idx_mode = ARMII::IndexModePost;
1063 if (writeback && (Rn == 15 || Rn == Rt)) S = Unpredictable; // UNPREDICTABLE
1066 CHECK(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder));
1067 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1068 switch( fieldFromInstruction32(Insn, 5, 2)) {
1084 unsigned amt = fieldFromInstruction32(Insn, 7, 5);
1085 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1087 Inst.addOperand(MCOperand::CreateImm(imm));
1089 Inst.addOperand(MCOperand::CreateReg(0));
1090 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1091 Inst.addOperand(MCOperand::CreateImm(tmp));
1094 CHECK(S, DecodePredicateOperand(Inst, pred, Address, Decoder));
1099 static DecodeStatus DecodeSORegMemOperand(llvm::MCInst &Inst, unsigned Val,
1100 uint64_t Address, const void *Decoder) {
1101 DecodeStatus S = Success;
1103 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1104 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1105 unsigned type = fieldFromInstruction32(Val, 5, 2);
1106 unsigned imm = fieldFromInstruction32(Val, 7, 5);
1107 unsigned U = fieldFromInstruction32(Val, 12, 1);
1109 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1125 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
1126 CHECK(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder));
1129 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1131 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1132 Inst.addOperand(MCOperand::CreateImm(shift));
1138 DecodeAddrMode3Instruction(llvm::MCInst &Inst, unsigned Insn,
1139 uint64_t Address, const void *Decoder) {
1140 DecodeStatus S = Success;
1142 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1143 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1144 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1145 unsigned type = fieldFromInstruction32(Insn, 22, 1);
1146 unsigned imm = fieldFromInstruction32(Insn, 8, 4);
1147 unsigned U = ((~fieldFromInstruction32(Insn, 23, 1)) & 1) << 8;
1148 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1149 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1150 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1152 bool writeback = (W == 1) | (P == 0);
1154 // For {LD,ST}RD, Rt must be even, else undefined.
1155 switch (Inst.getOpcode()) {
1158 case ARM::STRD_POST:
1161 case ARM::LDRD_POST:
1162 if (Rt & 0x1) return Fail;
1168 if (writeback) { // Writeback
1170 U |= ARMII::IndexModePre << 9;
1172 U |= ARMII::IndexModePost << 9;
1174 // On stores, the writeback operand precedes Rt.
1175 switch (Inst.getOpcode()) {
1178 case ARM::STRD_POST:
1181 case ARM::STRH_POST:
1182 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
1189 CHECK(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder));
1190 switch (Inst.getOpcode()) {
1193 case ARM::STRD_POST:
1196 case ARM::LDRD_POST:
1197 CHECK(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder));
1204 // On loads, the writeback operand comes after Rt.
1205 switch (Inst.getOpcode()) {
1208 case ARM::LDRD_POST:
1211 case ARM::LDRH_POST:
1213 case ARM::LDRSH_PRE:
1214 case ARM::LDRSH_POST:
1216 case ARM::LDRSB_PRE:
1217 case ARM::LDRSB_POST:
1220 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
1227 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
1230 Inst.addOperand(MCOperand::CreateReg(0));
1231 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1233 CHECK(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder));
1234 Inst.addOperand(MCOperand::CreateImm(U));
1237 CHECK(S, DecodePredicateOperand(Inst, pred, Address, Decoder));
1242 static DecodeStatus DecodeRFEInstruction(llvm::MCInst &Inst, unsigned Insn,
1243 uint64_t Address, const void *Decoder) {
1244 DecodeStatus S = Success;
1246 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1247 unsigned mode = fieldFromInstruction32(Insn, 23, 2);
1264 Inst.addOperand(MCOperand::CreateImm(mode));
1265 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
1270 static DecodeStatus DecodeMemMultipleWritebackInstruction(llvm::MCInst &Inst,
1272 uint64_t Address, const void *Decoder) {
1273 DecodeStatus S = Success;
1275 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1276 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1277 unsigned reglist = fieldFromInstruction32(Insn, 0, 16);
1280 switch (Inst.getOpcode()) {
1282 Inst.setOpcode(ARM::RFEDA);
1284 case ARM::LDMDA_UPD:
1285 Inst.setOpcode(ARM::RFEDA_UPD);
1288 Inst.setOpcode(ARM::RFEDB);
1290 case ARM::LDMDB_UPD:
1291 Inst.setOpcode(ARM::RFEDB_UPD);
1294 Inst.setOpcode(ARM::RFEIA);
1296 case ARM::LDMIA_UPD:
1297 Inst.setOpcode(ARM::RFEIA_UPD);
1300 Inst.setOpcode(ARM::RFEIB);
1302 case ARM::LDMIB_UPD:
1303 Inst.setOpcode(ARM::RFEIB_UPD);
1306 Inst.setOpcode(ARM::SRSDA);
1308 case ARM::STMDA_UPD:
1309 Inst.setOpcode(ARM::SRSDA_UPD);
1312 Inst.setOpcode(ARM::SRSDB);
1314 case ARM::STMDB_UPD:
1315 Inst.setOpcode(ARM::SRSDB_UPD);
1318 Inst.setOpcode(ARM::SRSIA);
1320 case ARM::STMIA_UPD:
1321 Inst.setOpcode(ARM::SRSIA_UPD);
1324 Inst.setOpcode(ARM::SRSIB);
1326 case ARM::STMIB_UPD:
1327 Inst.setOpcode(ARM::SRSIB_UPD);
1333 // For stores (which become SRS's, the only operand is the mode.
1334 if (fieldFromInstruction32(Insn, 20, 1) == 0) {
1336 MCOperand::CreateImm(fieldFromInstruction32(Insn, 0, 4)));
1340 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1343 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
1344 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)); // Tied
1345 CHECK(S, DecodePredicateOperand(Inst, pred, Address, Decoder));
1346 CHECK(S, DecodeRegListOperand(Inst, reglist, Address, Decoder));
1351 static DecodeStatus DecodeCPSInstruction(llvm::MCInst &Inst, unsigned Insn,
1352 uint64_t Address, const void *Decoder) {
1353 unsigned imod = fieldFromInstruction32(Insn, 18, 2);
1354 unsigned M = fieldFromInstruction32(Insn, 17, 1);
1355 unsigned iflags = fieldFromInstruction32(Insn, 6, 3);
1356 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1358 DecodeStatus S = Success;
1360 // imod == '01' --> UNPREDICTABLE
1361 // NOTE: Even though this is technically UNPREDICTABLE, we choose to
1362 // return failure here. The '01' imod value is unprintable, so there's
1363 // nothing useful we could do even if we returned UNPREDICTABLE.
1365 if (imod == 1) CHECK(S, Fail);
1368 Inst.setOpcode(ARM::CPS3p);
1369 Inst.addOperand(MCOperand::CreateImm(imod));
1370 Inst.addOperand(MCOperand::CreateImm(iflags));
1371 Inst.addOperand(MCOperand::CreateImm(mode));
1372 } else if (imod && !M) {
1373 Inst.setOpcode(ARM::CPS2p);
1374 Inst.addOperand(MCOperand::CreateImm(imod));
1375 Inst.addOperand(MCOperand::CreateImm(iflags));
1376 if (mode) CHECK(S, Unpredictable);
1377 } else if (!imod && M) {
1378 Inst.setOpcode(ARM::CPS1p);
1379 Inst.addOperand(MCOperand::CreateImm(mode));
1380 if (iflags) CHECK(S, Unpredictable);
1382 // imod == '00' && M == '0' --> UNPREDICTABLE
1383 Inst.setOpcode(ARM::CPS1p);
1384 Inst.addOperand(MCOperand::CreateImm(mode));
1385 CHECK(S, Unpredictable);
1391 static DecodeStatus DecodeSMLAInstruction(llvm::MCInst &Inst, unsigned Insn,
1392 uint64_t Address, const void *Decoder) {
1393 DecodeStatus S = Success;
1395 unsigned Rd = fieldFromInstruction32(Insn, 16, 4);
1396 unsigned Rn = fieldFromInstruction32(Insn, 0, 4);
1397 unsigned Rm = fieldFromInstruction32(Insn, 8, 4);
1398 unsigned Ra = fieldFromInstruction32(Insn, 12, 4);
1399 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1402 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
1404 CHECK(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder));
1405 CHECK(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder));
1406 CHECK(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder));
1407 CHECK(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder));
1409 CHECK(S, DecodePredicateOperand(Inst, pred, Address, Decoder));
1414 static DecodeStatus DecodeAddrModeImm12Operand(llvm::MCInst &Inst, unsigned Val,
1415 uint64_t Address, const void *Decoder) {
1416 DecodeStatus S = Success;
1418 unsigned add = fieldFromInstruction32(Val, 12, 1);
1419 unsigned imm = fieldFromInstruction32(Val, 0, 12);
1420 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1422 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
1424 if (!add) imm *= -1;
1425 if (imm == 0 && !add) imm = INT32_MIN;
1426 Inst.addOperand(MCOperand::CreateImm(imm));
1431 static DecodeStatus DecodeAddrMode5Operand(llvm::MCInst &Inst, unsigned Val,
1432 uint64_t Address, const void *Decoder) {
1433 DecodeStatus S = Success;
1435 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
1436 unsigned U = fieldFromInstruction32(Val, 8, 1);
1437 unsigned imm = fieldFromInstruction32(Val, 0, 8);
1439 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
1442 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
1444 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
1449 static DecodeStatus DecodeAddrMode7Operand(llvm::MCInst &Inst, unsigned Val,
1450 uint64_t Address, const void *Decoder) {
1451 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
1455 DecodeBranchImmInstruction(llvm::MCInst &Inst, unsigned Insn,
1456 uint64_t Address, const void *Decoder) {
1457 DecodeStatus S = Success;
1459 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1460 unsigned imm = fieldFromInstruction32(Insn, 0, 24) << 2;
1463 Inst.setOpcode(ARM::BLXi);
1464 imm |= fieldFromInstruction32(Insn, 24, 1) << 1;
1465 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1469 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1470 CHECK(S, DecodePredicateOperand(Inst, pred, Address, Decoder));
1476 static DecodeStatus DecodeVCVTImmOperand(llvm::MCInst &Inst, unsigned Val,
1477 uint64_t Address, const void *Decoder) {
1478 Inst.addOperand(MCOperand::CreateImm(64 - Val));
1482 static DecodeStatus DecodeAddrMode6Operand(llvm::MCInst &Inst, unsigned Val,
1483 uint64_t Address, const void *Decoder) {
1484 DecodeStatus S = Success;
1486 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1487 unsigned align = fieldFromInstruction32(Val, 4, 2);
1489 CHECK(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder));
1491 Inst.addOperand(MCOperand::CreateImm(0));
1493 Inst.addOperand(MCOperand::CreateImm(4 << align));
1498 static DecodeStatus DecodeVLDInstruction(llvm::MCInst &Inst, unsigned Insn,
1499 uint64_t Address, const void *Decoder) {
1500 DecodeStatus S = Success;
1502 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1503 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1504 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
1505 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1506 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
1507 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1509 // First output register
1510 CHECK(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder));
1512 // Second output register
1513 switch (Inst.getOpcode()) {
1518 case ARM::VLD1q8_UPD:
1519 case ARM::VLD1q16_UPD:
1520 case ARM::VLD1q32_UPD:
1521 case ARM::VLD1q64_UPD:
1526 case ARM::VLD1d8T_UPD:
1527 case ARM::VLD1d16T_UPD:
1528 case ARM::VLD1d32T_UPD:
1529 case ARM::VLD1d64T_UPD:
1534 case ARM::VLD1d8Q_UPD:
1535 case ARM::VLD1d16Q_UPD:
1536 case ARM::VLD1d32Q_UPD:
1537 case ARM::VLD1d64Q_UPD:
1541 case ARM::VLD2d8_UPD:
1542 case ARM::VLD2d16_UPD:
1543 case ARM::VLD2d32_UPD:
1547 case ARM::VLD2q8_UPD:
1548 case ARM::VLD2q16_UPD:
1549 case ARM::VLD2q32_UPD:
1553 case ARM::VLD3d8_UPD:
1554 case ARM::VLD3d16_UPD:
1555 case ARM::VLD3d32_UPD:
1559 case ARM::VLD4d8_UPD:
1560 case ARM::VLD4d16_UPD:
1561 case ARM::VLD4d32_UPD:
1562 CHECK(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder));
1567 case ARM::VLD2b8_UPD:
1568 case ARM::VLD2b16_UPD:
1569 case ARM::VLD2b32_UPD:
1573 case ARM::VLD3q8_UPD:
1574 case ARM::VLD3q16_UPD:
1575 case ARM::VLD3q32_UPD:
1579 case ARM::VLD4q8_UPD:
1580 case ARM::VLD4q16_UPD:
1581 case ARM::VLD4q32_UPD:
1582 CHECK(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder));
1587 // Third output register
1588 switch(Inst.getOpcode()) {
1593 case ARM::VLD1d8T_UPD:
1594 case ARM::VLD1d16T_UPD:
1595 case ARM::VLD1d32T_UPD:
1596 case ARM::VLD1d64T_UPD:
1601 case ARM::VLD1d8Q_UPD:
1602 case ARM::VLD1d16Q_UPD:
1603 case ARM::VLD1d32Q_UPD:
1604 case ARM::VLD1d64Q_UPD:
1608 case ARM::VLD2q8_UPD:
1609 case ARM::VLD2q16_UPD:
1610 case ARM::VLD2q32_UPD:
1614 case ARM::VLD3d8_UPD:
1615 case ARM::VLD3d16_UPD:
1616 case ARM::VLD3d32_UPD:
1620 case ARM::VLD4d8_UPD:
1621 case ARM::VLD4d16_UPD:
1622 case ARM::VLD4d32_UPD:
1623 CHECK(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder));
1628 case ARM::VLD3q8_UPD:
1629 case ARM::VLD3q16_UPD:
1630 case ARM::VLD3q32_UPD:
1634 case ARM::VLD4q8_UPD:
1635 case ARM::VLD4q16_UPD:
1636 case ARM::VLD4q32_UPD:
1637 CHECK(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder));
1643 // Fourth output register
1644 switch (Inst.getOpcode()) {
1649 case ARM::VLD1d8Q_UPD:
1650 case ARM::VLD1d16Q_UPD:
1651 case ARM::VLD1d32Q_UPD:
1652 case ARM::VLD1d64Q_UPD:
1656 case ARM::VLD2q8_UPD:
1657 case ARM::VLD2q16_UPD:
1658 case ARM::VLD2q32_UPD:
1662 case ARM::VLD4d8_UPD:
1663 case ARM::VLD4d16_UPD:
1664 case ARM::VLD4d32_UPD:
1665 CHECK(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder));
1670 case ARM::VLD4q8_UPD:
1671 case ARM::VLD4q16_UPD:
1672 case ARM::VLD4q32_UPD:
1673 CHECK(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder));
1679 // Writeback operand
1680 switch (Inst.getOpcode()) {
1681 case ARM::VLD1d8_UPD:
1682 case ARM::VLD1d16_UPD:
1683 case ARM::VLD1d32_UPD:
1684 case ARM::VLD1d64_UPD:
1685 case ARM::VLD1q8_UPD:
1686 case ARM::VLD1q16_UPD:
1687 case ARM::VLD1q32_UPD:
1688 case ARM::VLD1q64_UPD:
1689 case ARM::VLD1d8T_UPD:
1690 case ARM::VLD1d16T_UPD:
1691 case ARM::VLD1d32T_UPD:
1692 case ARM::VLD1d64T_UPD:
1693 case ARM::VLD1d8Q_UPD:
1694 case ARM::VLD1d16Q_UPD:
1695 case ARM::VLD1d32Q_UPD:
1696 case ARM::VLD1d64Q_UPD:
1697 case ARM::VLD2d8_UPD:
1698 case ARM::VLD2d16_UPD:
1699 case ARM::VLD2d32_UPD:
1700 case ARM::VLD2q8_UPD:
1701 case ARM::VLD2q16_UPD:
1702 case ARM::VLD2q32_UPD:
1703 case ARM::VLD2b8_UPD:
1704 case ARM::VLD2b16_UPD:
1705 case ARM::VLD2b32_UPD:
1706 case ARM::VLD3d8_UPD:
1707 case ARM::VLD3d16_UPD:
1708 case ARM::VLD3d32_UPD:
1709 case ARM::VLD3q8_UPD:
1710 case ARM::VLD3q16_UPD:
1711 case ARM::VLD3q32_UPD:
1712 case ARM::VLD4d8_UPD:
1713 case ARM::VLD4d16_UPD:
1714 case ARM::VLD4d32_UPD:
1715 case ARM::VLD4q8_UPD:
1716 case ARM::VLD4q16_UPD:
1717 case ARM::VLD4q32_UPD:
1718 CHECK(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder));
1724 // AddrMode6 Base (register+alignment)
1725 CHECK(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder));
1727 // AddrMode6 Offset (register)
1729 Inst.addOperand(MCOperand::CreateReg(0));
1730 else if (Rm != 0xF) {
1731 CHECK(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder));
1737 static DecodeStatus DecodeVSTInstruction(llvm::MCInst &Inst, unsigned Insn,
1738 uint64_t Address, const void *Decoder) {
1739 DecodeStatus S = Success;
1741 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1742 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1743 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
1744 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1745 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
1746 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1748 // Writeback Operand
1749 switch (Inst.getOpcode()) {
1750 case ARM::VST1d8_UPD:
1751 case ARM::VST1d16_UPD:
1752 case ARM::VST1d32_UPD:
1753 case ARM::VST1d64_UPD:
1754 case ARM::VST1q8_UPD:
1755 case ARM::VST1q16_UPD:
1756 case ARM::VST1q32_UPD:
1757 case ARM::VST1q64_UPD:
1758 case ARM::VST1d8T_UPD:
1759 case ARM::VST1d16T_UPD:
1760 case ARM::VST1d32T_UPD:
1761 case ARM::VST1d64T_UPD:
1762 case ARM::VST1d8Q_UPD:
1763 case ARM::VST1d16Q_UPD:
1764 case ARM::VST1d32Q_UPD:
1765 case ARM::VST1d64Q_UPD:
1766 case ARM::VST2d8_UPD:
1767 case ARM::VST2d16_UPD:
1768 case ARM::VST2d32_UPD:
1769 case ARM::VST2q8_UPD:
1770 case ARM::VST2q16_UPD:
1771 case ARM::VST2q32_UPD:
1772 case ARM::VST2b8_UPD:
1773 case ARM::VST2b16_UPD:
1774 case ARM::VST2b32_UPD:
1775 case ARM::VST3d8_UPD:
1776 case ARM::VST3d16_UPD:
1777 case ARM::VST3d32_UPD:
1778 case ARM::VST3q8_UPD:
1779 case ARM::VST3q16_UPD:
1780 case ARM::VST3q32_UPD:
1781 case ARM::VST4d8_UPD:
1782 case ARM::VST4d16_UPD:
1783 case ARM::VST4d32_UPD:
1784 case ARM::VST4q8_UPD:
1785 case ARM::VST4q16_UPD:
1786 case ARM::VST4q32_UPD:
1787 CHECK(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder));
1793 // AddrMode6 Base (register+alignment)
1794 CHECK(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder));
1796 // AddrMode6 Offset (register)
1798 Inst.addOperand(MCOperand::CreateReg(0));
1799 else if (Rm != 0xF) {
1800 CHECK(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder));
1803 // First input register
1804 CHECK(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder));
1806 // Second input register
1807 switch (Inst.getOpcode()) {
1812 case ARM::VST1q8_UPD:
1813 case ARM::VST1q16_UPD:
1814 case ARM::VST1q32_UPD:
1815 case ARM::VST1q64_UPD:
1820 case ARM::VST1d8T_UPD:
1821 case ARM::VST1d16T_UPD:
1822 case ARM::VST1d32T_UPD:
1823 case ARM::VST1d64T_UPD:
1828 case ARM::VST1d8Q_UPD:
1829 case ARM::VST1d16Q_UPD:
1830 case ARM::VST1d32Q_UPD:
1831 case ARM::VST1d64Q_UPD:
1835 case ARM::VST2d8_UPD:
1836 case ARM::VST2d16_UPD:
1837 case ARM::VST2d32_UPD:
1841 case ARM::VST2q8_UPD:
1842 case ARM::VST2q16_UPD:
1843 case ARM::VST2q32_UPD:
1847 case ARM::VST3d8_UPD:
1848 case ARM::VST3d16_UPD:
1849 case ARM::VST3d32_UPD:
1853 case ARM::VST4d8_UPD:
1854 case ARM::VST4d16_UPD:
1855 case ARM::VST4d32_UPD:
1856 CHECK(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder));
1861 case ARM::VST2b8_UPD:
1862 case ARM::VST2b16_UPD:
1863 case ARM::VST2b32_UPD:
1867 case ARM::VST3q8_UPD:
1868 case ARM::VST3q16_UPD:
1869 case ARM::VST3q32_UPD:
1873 case ARM::VST4q8_UPD:
1874 case ARM::VST4q16_UPD:
1875 case ARM::VST4q32_UPD:
1876 CHECK(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder));
1882 // Third input register
1883 switch (Inst.getOpcode()) {
1888 case ARM::VST1d8T_UPD:
1889 case ARM::VST1d16T_UPD:
1890 case ARM::VST1d32T_UPD:
1891 case ARM::VST1d64T_UPD:
1896 case ARM::VST1d8Q_UPD:
1897 case ARM::VST1d16Q_UPD:
1898 case ARM::VST1d32Q_UPD:
1899 case ARM::VST1d64Q_UPD:
1903 case ARM::VST2q8_UPD:
1904 case ARM::VST2q16_UPD:
1905 case ARM::VST2q32_UPD:
1909 case ARM::VST3d8_UPD:
1910 case ARM::VST3d16_UPD:
1911 case ARM::VST3d32_UPD:
1915 case ARM::VST4d8_UPD:
1916 case ARM::VST4d16_UPD:
1917 case ARM::VST4d32_UPD:
1918 CHECK(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder));
1923 case ARM::VST3q8_UPD:
1924 case ARM::VST3q16_UPD:
1925 case ARM::VST3q32_UPD:
1929 case ARM::VST4q8_UPD:
1930 case ARM::VST4q16_UPD:
1931 case ARM::VST4q32_UPD:
1932 CHECK(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder));
1938 // Fourth input register
1939 switch (Inst.getOpcode()) {
1944 case ARM::VST1d8Q_UPD:
1945 case ARM::VST1d16Q_UPD:
1946 case ARM::VST1d32Q_UPD:
1947 case ARM::VST1d64Q_UPD:
1951 case ARM::VST2q8_UPD:
1952 case ARM::VST2q16_UPD:
1953 case ARM::VST2q32_UPD:
1957 case ARM::VST4d8_UPD:
1958 case ARM::VST4d16_UPD:
1959 case ARM::VST4d32_UPD:
1960 CHECK(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder));
1965 case ARM::VST4q8_UPD:
1966 case ARM::VST4q16_UPD:
1967 case ARM::VST4q32_UPD:
1968 CHECK(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder));
1977 static DecodeStatus DecodeVLD1DupInstruction(llvm::MCInst &Inst, unsigned Insn,
1978 uint64_t Address, const void *Decoder) {
1979 DecodeStatus S = Success;
1981 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1982 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1983 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1984 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1985 unsigned align = fieldFromInstruction32(Insn, 4, 1);
1986 unsigned size = fieldFromInstruction32(Insn, 6, 2);
1987 unsigned regs = fieldFromInstruction32(Insn, 5, 1) + 1;
1989 align *= (1 << size);
1991 CHECK(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder));
1993 CHECK(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder));
1996 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
1999 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
2000 Inst.addOperand(MCOperand::CreateImm(align));
2003 Inst.addOperand(MCOperand::CreateReg(0));
2004 else if (Rm != 0xF) {
2005 CHECK(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder));
2011 static DecodeStatus DecodeVLD2DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2012 uint64_t Address, const void *Decoder) {
2013 DecodeStatus S = Success;
2015 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2016 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2017 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2018 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2019 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2020 unsigned size = 1 << fieldFromInstruction32(Insn, 6, 2);
2021 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2024 CHECK(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder));
2025 CHECK(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder));
2027 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
2030 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
2031 Inst.addOperand(MCOperand::CreateImm(align));
2034 Inst.addOperand(MCOperand::CreateReg(0));
2035 else if (Rm != 0xF) {
2036 CHECK(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder));
2042 static DecodeStatus DecodeVLD3DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2043 uint64_t Address, const void *Decoder) {
2044 DecodeStatus S = Success;
2046 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2047 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2048 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2049 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2050 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2052 CHECK(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder));
2053 CHECK(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder));
2054 CHECK(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder));
2056 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
2059 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
2060 Inst.addOperand(MCOperand::CreateImm(0));
2063 Inst.addOperand(MCOperand::CreateReg(0));
2064 else if (Rm != 0xF) {
2065 CHECK(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder));
2071 static DecodeStatus DecodeVLD4DupInstruction(llvm::MCInst &Inst, unsigned Insn,
2072 uint64_t Address, const void *Decoder) {
2073 DecodeStatus S = Success;
2075 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2076 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2077 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2078 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2079 unsigned size = fieldFromInstruction32(Insn, 6, 2);
2080 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
2081 unsigned align = fieldFromInstruction32(Insn, 4, 1);
2096 CHECK(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder));
2097 CHECK(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder));
2098 CHECK(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder));
2099 CHECK(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder));
2101 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
2104 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
2105 Inst.addOperand(MCOperand::CreateImm(align));
2108 Inst.addOperand(MCOperand::CreateReg(0));
2109 else if (Rm != 0xF) {
2110 CHECK(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder));
2117 DecodeNEONModImmInstruction(llvm::MCInst &Inst, unsigned Insn,
2118 uint64_t Address, const void *Decoder) {
2119 DecodeStatus S = Success;
2121 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2122 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2123 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
2124 imm |= fieldFromInstruction32(Insn, 16, 3) << 4;
2125 imm |= fieldFromInstruction32(Insn, 24, 1) << 7;
2126 imm |= fieldFromInstruction32(Insn, 8, 4) << 8;
2127 imm |= fieldFromInstruction32(Insn, 5, 1) << 12;
2128 unsigned Q = fieldFromInstruction32(Insn, 6, 1);
2131 CHECK(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder));
2133 CHECK(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder));
2136 Inst.addOperand(MCOperand::CreateImm(imm));
2138 switch (Inst.getOpcode()) {
2139 case ARM::VORRiv4i16:
2140 case ARM::VORRiv2i32:
2141 case ARM::VBICiv4i16:
2142 case ARM::VBICiv2i32:
2143 CHECK(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder));
2145 case ARM::VORRiv8i16:
2146 case ARM::VORRiv4i32:
2147 case ARM::VBICiv8i16:
2148 case ARM::VBICiv4i32:
2149 CHECK(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder));
2158 static DecodeStatus DecodeVSHLMaxInstruction(llvm::MCInst &Inst, unsigned Insn,
2159 uint64_t Address, const void *Decoder) {
2160 DecodeStatus S = Success;
2162 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2163 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2164 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2165 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2166 unsigned size = fieldFromInstruction32(Insn, 18, 2);
2168 CHECK(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder));
2169 CHECK(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder));
2170 Inst.addOperand(MCOperand::CreateImm(8 << size));
2175 static DecodeStatus DecodeShiftRight8Imm(llvm::MCInst &Inst, unsigned Val,
2176 uint64_t Address, const void *Decoder) {
2177 Inst.addOperand(MCOperand::CreateImm(8 - Val));
2181 static DecodeStatus DecodeShiftRight16Imm(llvm::MCInst &Inst, unsigned Val,
2182 uint64_t Address, const void *Decoder) {
2183 Inst.addOperand(MCOperand::CreateImm(16 - Val));
2187 static DecodeStatus DecodeShiftRight32Imm(llvm::MCInst &Inst, unsigned Val,
2188 uint64_t Address, const void *Decoder) {
2189 Inst.addOperand(MCOperand::CreateImm(32 - Val));
2193 static DecodeStatus DecodeShiftRight64Imm(llvm::MCInst &Inst, unsigned Val,
2194 uint64_t Address, const void *Decoder) {
2195 Inst.addOperand(MCOperand::CreateImm(64 - Val));
2199 static DecodeStatus DecodeTBLInstruction(llvm::MCInst &Inst, unsigned Insn,
2200 uint64_t Address, const void *Decoder) {
2201 DecodeStatus S = Success;
2203 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2204 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2205 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2206 Rn |= fieldFromInstruction32(Insn, 7, 1) << 4;
2207 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2208 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2209 unsigned op = fieldFromInstruction32(Insn, 6, 1);
2210 unsigned length = fieldFromInstruction32(Insn, 8, 2) + 1;
2212 CHECK(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder));
2214 CHECK(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)); // Writeback
2217 for (unsigned i = 0; i < length; ++i) {
2218 CHECK(S, DecodeDPRRegisterClass(Inst, (Rn+i)%32, Address, Decoder));
2221 CHECK(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder));
2226 static DecodeStatus DecodeVFPfpImm(llvm::MCInst &Inst, unsigned Val,
2227 uint64_t Address, const void *Decoder) {
2228 // The immediate needs to be a fully instantiated float. However, the
2229 // auto-generated decoder is only able to fill in some of the bits
2230 // necessary. For instance, the 'b' bit is replicated multiple times,
2231 // and is even present in inverted form in one bit. We do a little
2232 // binary parsing here to fill in those missing bits, and then
2233 // reinterpret it all as a float.
2239 fp_conv.integer = Val;
2240 uint32_t b = fieldFromInstruction32(Val, 25, 1);
2241 fp_conv.integer |= b << 26;
2242 fp_conv.integer |= b << 27;
2243 fp_conv.integer |= b << 28;
2244 fp_conv.integer |= b << 29;
2245 fp_conv.integer |= (~b & 0x1) << 30;
2247 Inst.addOperand(MCOperand::CreateFPImm(fp_conv.fp));
2251 static DecodeStatus DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn,
2252 uint64_t Address, const void *Decoder) {
2253 DecodeStatus S = Success;
2255 unsigned dst = fieldFromInstruction16(Insn, 8, 3);
2256 unsigned imm = fieldFromInstruction16(Insn, 0, 8);
2258 CHECK(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder));
2260 if (Inst.getOpcode() == ARM::tADR)
2261 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
2262 else if (Inst.getOpcode() == ARM::tADDrSPi)
2263 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2267 Inst.addOperand(MCOperand::CreateImm(imm));
2271 static DecodeStatus DecodeThumbBROperand(llvm::MCInst &Inst, unsigned Val,
2272 uint64_t Address, const void *Decoder) {
2273 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
2277 static DecodeStatus DecodeT2BROperand(llvm::MCInst &Inst, unsigned Val,
2278 uint64_t Address, const void *Decoder) {
2279 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
2283 static DecodeStatus DecodeThumbCmpBROperand(llvm::MCInst &Inst, unsigned Val,
2284 uint64_t Address, const void *Decoder) {
2285 Inst.addOperand(MCOperand::CreateImm(SignExtend32<7>(Val << 1)));
2289 static DecodeStatus DecodeThumbAddrModeRR(llvm::MCInst &Inst, unsigned Val,
2290 uint64_t Address, const void *Decoder) {
2291 DecodeStatus S = Success;
2293 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2294 unsigned Rm = fieldFromInstruction32(Val, 3, 3);
2296 CHECK(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder));
2297 CHECK(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder));
2302 static DecodeStatus DecodeThumbAddrModeIS(llvm::MCInst &Inst, unsigned Val,
2303 uint64_t Address, const void *Decoder) {
2304 DecodeStatus S = Success;
2306 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2307 unsigned imm = fieldFromInstruction32(Val, 3, 5);
2309 CHECK(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder));
2310 Inst.addOperand(MCOperand::CreateImm(imm));
2315 static DecodeStatus DecodeThumbAddrModePC(llvm::MCInst &Inst, unsigned Val,
2316 uint64_t Address, const void *Decoder) {
2317 Inst.addOperand(MCOperand::CreateImm(Val << 2));
2322 static DecodeStatus DecodeThumbAddrModeSP(llvm::MCInst &Inst, unsigned Val,
2323 uint64_t Address, const void *Decoder) {
2324 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2325 Inst.addOperand(MCOperand::CreateImm(Val));
2330 static DecodeStatus DecodeT2AddrModeSOReg(llvm::MCInst &Inst, unsigned Val,
2331 uint64_t Address, const void *Decoder) {
2332 DecodeStatus S = Success;
2334 unsigned Rn = fieldFromInstruction32(Val, 6, 4);
2335 unsigned Rm = fieldFromInstruction32(Val, 2, 4);
2336 unsigned imm = fieldFromInstruction32(Val, 0, 2);
2338 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
2339 CHECK(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder));
2340 Inst.addOperand(MCOperand::CreateImm(imm));
2345 static DecodeStatus DecodeT2LoadShift(llvm::MCInst &Inst, unsigned Insn,
2346 uint64_t Address, const void *Decoder) {
2347 DecodeStatus S = Success;
2349 if (Inst.getOpcode() != ARM::t2PLDs) {
2350 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2351 CHECK(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder));
2354 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2356 switch (Inst.getOpcode()) {
2358 Inst.setOpcode(ARM::t2LDRBpci);
2361 Inst.setOpcode(ARM::t2LDRHpci);
2364 Inst.setOpcode(ARM::t2LDRSHpci);
2367 Inst.setOpcode(ARM::t2LDRSBpci);
2370 Inst.setOpcode(ARM::t2PLDi12);
2371 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
2377 int imm = fieldFromInstruction32(Insn, 0, 12);
2378 if (!fieldFromInstruction32(Insn, 23, 1)) imm *= -1;
2379 Inst.addOperand(MCOperand::CreateImm(imm));
2384 unsigned addrmode = fieldFromInstruction32(Insn, 4, 2);
2385 addrmode |= fieldFromInstruction32(Insn, 0, 4) << 2;
2386 addrmode |= fieldFromInstruction32(Insn, 16, 4) << 6;
2387 CHECK(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder));
2392 static DecodeStatus DecodeT2Imm8S4(llvm::MCInst &Inst, unsigned Val,
2393 uint64_t Address, const void *Decoder) {
2394 int imm = Val & 0xFF;
2395 if (!(Val & 0x100)) imm *= -1;
2396 Inst.addOperand(MCOperand::CreateImm(imm << 2));
2401 static DecodeStatus DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val,
2402 uint64_t Address, const void *Decoder) {
2403 DecodeStatus S = Success;
2405 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2406 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2408 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
2409 CHECK(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder));
2414 static DecodeStatus DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
2415 uint64_t Address, const void *Decoder) {
2416 int imm = Val & 0xFF;
2417 if (!(Val & 0x100)) imm *= -1;
2418 Inst.addOperand(MCOperand::CreateImm(imm));
2424 static DecodeStatus DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val,
2425 uint64_t Address, const void *Decoder) {
2426 DecodeStatus S = Success;
2428 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2429 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2431 // Some instructions always use an additive offset.
2432 switch (Inst.getOpcode()) {
2444 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
2445 CHECK(S, DecodeT2Imm8(Inst, imm, Address, Decoder));
2451 static DecodeStatus DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val,
2452 uint64_t Address, const void *Decoder) {
2453 DecodeStatus S = Success;
2455 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
2456 unsigned imm = fieldFromInstruction32(Val, 0, 12);
2458 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
2459 Inst.addOperand(MCOperand::CreateImm(imm));
2465 static DecodeStatus DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Insn,
2466 uint64_t Address, const void *Decoder) {
2467 unsigned imm = fieldFromInstruction16(Insn, 0, 7);
2469 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2470 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2471 Inst.addOperand(MCOperand::CreateImm(imm));
2476 static DecodeStatus DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn,
2477 uint64_t Address, const void *Decoder) {
2478 DecodeStatus S = Success;
2480 if (Inst.getOpcode() == ARM::tADDrSP) {
2481 unsigned Rdm = fieldFromInstruction16(Insn, 0, 3);
2482 Rdm |= fieldFromInstruction16(Insn, 7, 1) << 3;
2484 CHECK(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder));
2485 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2486 CHECK(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder));
2487 } else if (Inst.getOpcode() == ARM::tADDspr) {
2488 unsigned Rm = fieldFromInstruction16(Insn, 3, 4);
2490 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2491 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2492 CHECK(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder));
2498 static DecodeStatus DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn,
2499 uint64_t Address, const void *Decoder) {
2500 unsigned imod = fieldFromInstruction16(Insn, 4, 1) | 0x2;
2501 unsigned flags = fieldFromInstruction16(Insn, 0, 3);
2503 Inst.addOperand(MCOperand::CreateImm(imod));
2504 Inst.addOperand(MCOperand::CreateImm(flags));
2509 static DecodeStatus DecodePostIdxReg(llvm::MCInst &Inst, unsigned Insn,
2510 uint64_t Address, const void *Decoder) {
2511 DecodeStatus S = Success;
2512 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2513 unsigned add = fieldFromInstruction32(Insn, 4, 1);
2515 CHECK(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) ;
2516 Inst.addOperand(MCOperand::CreateImm(add));
2521 static DecodeStatus DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Val,
2522 uint64_t Address, const void *Decoder) {
2523 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
2527 static DecodeStatus DecodeCoprocessor(llvm::MCInst &Inst, unsigned Val,
2528 uint64_t Address, const void *Decoder) {
2529 if (Val == 0xA || Val == 0xB)
2532 Inst.addOperand(MCOperand::CreateImm(Val));
2537 DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Insn,
2538 uint64_t Address, const void *Decoder) {
2539 DecodeStatus S = Success;
2541 unsigned pred = fieldFromInstruction32(Insn, 22, 4);
2542 if (pred == 0xE || pred == 0xF) {
2543 unsigned opc = fieldFromInstruction32(Insn, 4, 2);
2548 Inst.setOpcode(ARM::t2DSB);
2551 Inst.setOpcode(ARM::t2DMB);
2554 Inst.setOpcode(ARM::t2ISB);
2558 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
2559 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
2562 unsigned brtarget = fieldFromInstruction32(Insn, 0, 11) << 1;
2563 brtarget |= fieldFromInstruction32(Insn, 11, 1) << 19;
2564 brtarget |= fieldFromInstruction32(Insn, 13, 1) << 18;
2565 brtarget |= fieldFromInstruction32(Insn, 16, 6) << 12;
2566 brtarget |= fieldFromInstruction32(Insn, 26, 1) << 20;
2568 CHECK(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder));
2569 CHECK(S, DecodePredicateOperand(Inst, pred, Address, Decoder));
2574 // Decode a shifted immediate operand. These basically consist
2575 // of an 8-bit value, and a 4-bit directive that specifies either
2576 // a splat operation or a rotation.
2577 static DecodeStatus DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val,
2578 uint64_t Address, const void *Decoder) {
2579 unsigned ctrl = fieldFromInstruction32(Val, 10, 2);
2581 unsigned byte = fieldFromInstruction32(Val, 8, 2);
2582 unsigned imm = fieldFromInstruction32(Val, 0, 8);
2585 Inst.addOperand(MCOperand::CreateImm(imm));
2588 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
2591 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
2594 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
2599 unsigned unrot = fieldFromInstruction32(Val, 0, 7) | 0x80;
2600 unsigned rot = fieldFromInstruction32(Val, 7, 5);
2601 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
2602 Inst.addOperand(MCOperand::CreateImm(imm));
2609 DecodeThumbBCCTargetOperand(llvm::MCInst &Inst, unsigned Val,
2610 uint64_t Address, const void *Decoder){
2611 Inst.addOperand(MCOperand::CreateImm(Val << 1));
2615 static DecodeStatus DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
2616 uint64_t Address, const void *Decoder){
2617 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
2621 static DecodeStatus DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Val,
2622 uint64_t Address, const void *Decoder) {
2637 Inst.addOperand(MCOperand::CreateImm(Val));
2641 static DecodeStatus DecodeMSRMask(llvm::MCInst &Inst, unsigned Val,
2642 uint64_t Address, const void *Decoder) {
2643 if (!Val) return Fail;
2644 Inst.addOperand(MCOperand::CreateImm(Val));
2648 static DecodeStatus DecodeDoubleRegLoad(llvm::MCInst &Inst, unsigned Insn,
2649 uint64_t Address, const void *Decoder) {
2650 DecodeStatus S = Success;
2652 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2653 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2654 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
2656 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return Fail;
2658 CHECK(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder));
2659 CHECK(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder));
2660 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
2661 CHECK(S, DecodePredicateOperand(Inst, pred, Address, Decoder));
2667 static DecodeStatus DecodeDoubleRegStore(llvm::MCInst &Inst, unsigned Insn,
2668 uint64_t Address, const void *Decoder){
2669 DecodeStatus S = Success;
2671 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2672 unsigned Rt = fieldFromInstruction32(Insn, 0, 4);
2673 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2674 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
2676 CHECK(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder));
2678 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return Fail;
2679 if (Rd == Rn || Rd == Rt || Rd == Rt+1) return Fail;
2681 CHECK(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder));
2682 CHECK(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder));
2683 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
2684 CHECK(S, DecodePredicateOperand(Inst, pred, Address, Decoder));
2689 static DecodeStatus DecodeSTRPreImm(llvm::MCInst &Inst, unsigned Insn,
2690 uint64_t Address, const void *Decoder) {
2691 DecodeStatus S = Success;
2693 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2694 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2695 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
2696 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
2697 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
2698 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
2700 if (Rn == 0xF || Rn == Rt) CHECK(S, Unpredictable);
2702 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
2703 CHECK(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder));
2704 CHECK(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder));
2705 CHECK(S, DecodePredicateOperand(Inst, pred, Address, Decoder));
2710 static DecodeStatus DecodeSTRPreReg(llvm::MCInst &Inst, unsigned Insn,
2711 uint64_t Address, const void *Decoder) {
2712 DecodeStatus S = Success;
2714 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2715 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2716 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
2717 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
2718 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
2719 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
2721 if (Rn == 0xF || Rn == Rt) CHECK(S, Unpredictable);
2723 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
2724 CHECK(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder));
2725 CHECK(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder));
2726 CHECK(S, DecodePredicateOperand(Inst, pred, Address, Decoder));
2731 static DecodeStatus DecodeVLD1LN(llvm::MCInst &Inst, unsigned Insn,
2732 uint64_t Address, const void *Decoder) {
2733 DecodeStatus S = Success;
2735 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2736 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2737 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2738 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2739 unsigned size = fieldFromInstruction32(Insn, 10, 2);
2747 if (fieldFromInstruction32(Insn, 4, 1))
2748 return Fail; // UNDEFINED
2749 index = fieldFromInstruction32(Insn, 5, 3);
2752 if (fieldFromInstruction32(Insn, 5, 1))
2753 return Fail; // UNDEFINED
2754 index = fieldFromInstruction32(Insn, 6, 2);
2755 if (fieldFromInstruction32(Insn, 4, 1))
2759 if (fieldFromInstruction32(Insn, 6, 1))
2760 return Fail; // UNDEFINED
2761 index = fieldFromInstruction32(Insn, 7, 1);
2762 if (fieldFromInstruction32(Insn, 4, 2) != 0)
2766 CHECK(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder));
2767 if (Rm != 0xF) { // Writeback
2768 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
2770 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
2771 Inst.addOperand(MCOperand::CreateImm(align));
2772 if (Rm != 0xF && Rm != 0xD) {
2773 CHECK(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder));
2776 CHECK(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder));
2777 Inst.addOperand(MCOperand::CreateImm(index));
2782 static DecodeStatus DecodeVST1LN(llvm::MCInst &Inst, unsigned Insn,
2783 uint64_t Address, const void *Decoder) {
2784 DecodeStatus S = Success;
2786 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2787 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2788 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2789 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2790 unsigned size = fieldFromInstruction32(Insn, 10, 2);
2798 if (fieldFromInstruction32(Insn, 4, 1))
2799 return Fail; // UNDEFINED
2800 index = fieldFromInstruction32(Insn, 5, 3);
2803 if (fieldFromInstruction32(Insn, 5, 1))
2804 return Fail; // UNDEFINED
2805 index = fieldFromInstruction32(Insn, 6, 2);
2806 if (fieldFromInstruction32(Insn, 4, 1))
2810 if (fieldFromInstruction32(Insn, 6, 1))
2811 return Fail; // UNDEFINED
2812 index = fieldFromInstruction32(Insn, 7, 1);
2813 if (fieldFromInstruction32(Insn, 4, 2) != 0)
2817 if (Rm != 0xF) { // Writeback
2818 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
2820 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
2821 Inst.addOperand(MCOperand::CreateImm(align));
2822 if (Rm != 0xF && Rm != 0xD) {
2823 CHECK(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder));
2826 CHECK(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder));
2827 Inst.addOperand(MCOperand::CreateImm(index));
2833 static DecodeStatus DecodeVLD2LN(llvm::MCInst &Inst, unsigned Insn,
2834 uint64_t Address, const void *Decoder) {
2835 DecodeStatus S = Success;
2837 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2838 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2839 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2840 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2841 unsigned size = fieldFromInstruction32(Insn, 10, 2);
2850 index = fieldFromInstruction32(Insn, 5, 3);
2851 if (fieldFromInstruction32(Insn, 4, 1))
2855 index = fieldFromInstruction32(Insn, 6, 2);
2856 if (fieldFromInstruction32(Insn, 4, 1))
2858 if (fieldFromInstruction32(Insn, 5, 1))
2862 if (fieldFromInstruction32(Insn, 5, 1))
2863 return Fail; // UNDEFINED
2864 index = fieldFromInstruction32(Insn, 7, 1);
2865 if (fieldFromInstruction32(Insn, 4, 1) != 0)
2867 if (fieldFromInstruction32(Insn, 6, 1))
2872 CHECK(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder));
2873 CHECK(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder));
2874 if (Rm != 0xF) { // Writeback
2875 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
2877 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
2878 Inst.addOperand(MCOperand::CreateImm(align));
2879 if (Rm != 0xF && Rm != 0xD) {
2880 CHECK(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder));
2883 CHECK(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder));
2884 CHECK(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder));
2885 Inst.addOperand(MCOperand::CreateImm(index));
2890 static DecodeStatus DecodeVST2LN(llvm::MCInst &Inst, unsigned Insn,
2891 uint64_t Address, const void *Decoder) {
2892 DecodeStatus S = Success;
2894 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2895 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2896 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2897 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2898 unsigned size = fieldFromInstruction32(Insn, 10, 2);
2907 index = fieldFromInstruction32(Insn, 5, 3);
2908 if (fieldFromInstruction32(Insn, 4, 1))
2912 index = fieldFromInstruction32(Insn, 6, 2);
2913 if (fieldFromInstruction32(Insn, 4, 1))
2915 if (fieldFromInstruction32(Insn, 5, 1))
2919 if (fieldFromInstruction32(Insn, 5, 1))
2920 return Fail; // UNDEFINED
2921 index = fieldFromInstruction32(Insn, 7, 1);
2922 if (fieldFromInstruction32(Insn, 4, 1) != 0)
2924 if (fieldFromInstruction32(Insn, 6, 1))
2929 if (Rm != 0xF) { // Writeback
2930 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
2932 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
2933 Inst.addOperand(MCOperand::CreateImm(align));
2934 if (Rm != 0xF && Rm != 0xD) {
2935 CHECK(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder));
2938 CHECK(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder));
2939 CHECK(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder));
2940 Inst.addOperand(MCOperand::CreateImm(index));
2946 static DecodeStatus DecodeVLD3LN(llvm::MCInst &Inst, unsigned Insn,
2947 uint64_t Address, const void *Decoder) {
2948 DecodeStatus S = Success;
2950 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2951 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2952 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2953 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2954 unsigned size = fieldFromInstruction32(Insn, 10, 2);
2963 if (fieldFromInstruction32(Insn, 4, 1))
2964 return Fail; // UNDEFINED
2965 index = fieldFromInstruction32(Insn, 5, 3);
2968 if (fieldFromInstruction32(Insn, 4, 1))
2969 return Fail; // UNDEFINED
2970 index = fieldFromInstruction32(Insn, 6, 2);
2971 if (fieldFromInstruction32(Insn, 5, 1))
2975 if (fieldFromInstruction32(Insn, 4, 2))
2976 return Fail; // UNDEFINED
2977 index = fieldFromInstruction32(Insn, 7, 1);
2978 if (fieldFromInstruction32(Insn, 6, 1))
2983 CHECK(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder));
2984 CHECK(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder));
2985 CHECK(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder));
2987 if (Rm != 0xF) { // Writeback
2988 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
2990 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
2991 Inst.addOperand(MCOperand::CreateImm(align));
2992 if (Rm != 0xF && Rm != 0xD) {
2993 CHECK(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder));
2996 CHECK(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder));
2997 CHECK(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder));
2998 CHECK(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder));
2999 Inst.addOperand(MCOperand::CreateImm(index));
3004 static DecodeStatus DecodeVST3LN(llvm::MCInst &Inst, unsigned Insn,
3005 uint64_t Address, const void *Decoder) {
3006 DecodeStatus S = Success;
3008 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3009 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3010 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3011 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3012 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3021 if (fieldFromInstruction32(Insn, 4, 1))
3022 return Fail; // UNDEFINED
3023 index = fieldFromInstruction32(Insn, 5, 3);
3026 if (fieldFromInstruction32(Insn, 4, 1))
3027 return Fail; // UNDEFINED
3028 index = fieldFromInstruction32(Insn, 6, 2);
3029 if (fieldFromInstruction32(Insn, 5, 1))
3033 if (fieldFromInstruction32(Insn, 4, 2))
3034 return Fail; // UNDEFINED
3035 index = fieldFromInstruction32(Insn, 7, 1);
3036 if (fieldFromInstruction32(Insn, 6, 1))
3041 if (Rm != 0xF) { // Writeback
3042 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
3044 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
3045 Inst.addOperand(MCOperand::CreateImm(align));
3046 if (Rm != 0xF && Rm != 0xD) {
3047 CHECK(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder));
3050 CHECK(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder));
3051 CHECK(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder));
3052 CHECK(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder));
3053 Inst.addOperand(MCOperand::CreateImm(index));
3059 static DecodeStatus DecodeVLD4LN(llvm::MCInst &Inst, unsigned Insn,
3060 uint64_t Address, const void *Decoder) {
3061 DecodeStatus S = Success;
3063 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3064 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3065 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3066 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3067 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3076 if (fieldFromInstruction32(Insn, 4, 1))
3078 index = fieldFromInstruction32(Insn, 5, 3);
3081 if (fieldFromInstruction32(Insn, 4, 1))
3083 index = fieldFromInstruction32(Insn, 6, 2);
3084 if (fieldFromInstruction32(Insn, 5, 1))
3088 if (fieldFromInstruction32(Insn, 4, 2))
3089 align = 4 << fieldFromInstruction32(Insn, 4, 2);
3090 index = fieldFromInstruction32(Insn, 7, 1);
3091 if (fieldFromInstruction32(Insn, 6, 1))
3096 CHECK(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder));
3097 CHECK(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder));
3098 CHECK(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder));
3099 CHECK(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder));
3101 if (Rm != 0xF) { // Writeback
3102 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
3104 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
3105 Inst.addOperand(MCOperand::CreateImm(align));
3106 if (Rm != 0xF && Rm != 0xD) {
3107 CHECK(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder));
3110 CHECK(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder));
3111 CHECK(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder));
3112 CHECK(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder));
3113 CHECK(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder));
3114 Inst.addOperand(MCOperand::CreateImm(index));
3119 static DecodeStatus DecodeVST4LN(llvm::MCInst &Inst, unsigned Insn,
3120 uint64_t Address, const void *Decoder) {
3121 DecodeStatus S = Success;
3123 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
3124 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
3125 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
3126 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
3127 unsigned size = fieldFromInstruction32(Insn, 10, 2);
3136 if (fieldFromInstruction32(Insn, 4, 1))
3138 index = fieldFromInstruction32(Insn, 5, 3);
3141 if (fieldFromInstruction32(Insn, 4, 1))
3143 index = fieldFromInstruction32(Insn, 6, 2);
3144 if (fieldFromInstruction32(Insn, 5, 1))
3148 if (fieldFromInstruction32(Insn, 4, 2))
3149 align = 4 << fieldFromInstruction32(Insn, 4, 2);
3150 index = fieldFromInstruction32(Insn, 7, 1);
3151 if (fieldFromInstruction32(Insn, 6, 1))
3156 if (Rm != 0xF) { // Writeback
3157 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
3159 CHECK(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder));
3160 Inst.addOperand(MCOperand::CreateImm(align));
3161 if (Rm != 0xF && Rm != 0xD) {
3162 CHECK(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder));
3165 CHECK(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder));
3166 CHECK(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder));
3167 CHECK(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder));
3168 CHECK(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder));
3169 Inst.addOperand(MCOperand::CreateImm(index));