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 // Forward declare these because the autogenerated code will reference them.
28 // Definitions are further down.
29 static bool DecodeGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
30 uint64_t Address, const void *Decoder);
31 static bool DecodeGPRnopcRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
32 uint64_t Address, const void *Decoder);
33 static bool DecodetGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
34 uint64_t Address, const void *Decoder);
35 static bool DecodetcGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
36 uint64_t Address, const void *Decoder);
37 static bool DecoderGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
38 uint64_t Address, const void *Decoder);
39 static bool DecodeSPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
40 uint64_t Address, const void *Decoder);
41 static bool DecodeDPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
42 uint64_t Address, const void *Decoder);
43 static bool DecodeDPR_8RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
44 uint64_t Address, const void *Decoder);
45 static bool DecodeDPR_VFP2RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
46 uint64_t Address, const void *Decoder);
47 static bool DecodeQPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
48 uint64_t Address, const void *Decoder);
50 static bool DecodePredicateOperand(llvm::MCInst &Inst, unsigned Val,
51 uint64_t Address, const void *Decoder);
52 static bool DecodeCCOutOperand(llvm::MCInst &Inst, unsigned Val,
53 uint64_t Address, const void *Decoder);
54 static bool DecodeSOImmOperand(llvm::MCInst &Inst, unsigned Val,
55 uint64_t Address, const void *Decoder);
56 static bool DecodeBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
57 uint64_t Address, const void *Decoder);
58 static bool DecodeRegListOperand(llvm::MCInst &Inst, unsigned Val,
59 uint64_t Address, const void *Decoder);
60 static bool DecodeSPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
61 uint64_t Address, const void *Decoder);
62 static bool DecodeDPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
63 uint64_t Address, const void *Decoder);
65 static bool DecodeBitfieldMaskOperand(llvm::MCInst &Inst, unsigned Insn,
66 uint64_t Address, const void *Decoder);
67 static bool DecodeCopMemInstruction(llvm::MCInst &Inst, unsigned Insn,
68 uint64_t Address, const void *Decoder);
69 static bool DecodeAddrMode2IdxInstruction(llvm::MCInst &Inst, unsigned Insn,
70 uint64_t Address, const void *Decoder);
71 static bool DecodeSORegMemOperand(llvm::MCInst &Inst, unsigned Insn,
72 uint64_t Address, const void *Decoder);
73 static bool DecodeAddrMode3Instruction(llvm::MCInst &Inst, unsigned Insn,
74 uint64_t Address, const void *Decoder);
75 static bool DecodeSORegImmOperand(llvm::MCInst &Inst, unsigned Insn,
76 uint64_t Address, const void *Decoder);
77 static bool DecodeSORegRegOperand(llvm::MCInst &Inst, unsigned Insn,
78 uint64_t Address, const void *Decoder);
80 static bool DecodeMemMultipleWritebackInstruction(llvm::MCInst & Inst,
84 static bool DecodeSMLAInstruction(llvm::MCInst &Inst, unsigned Insn,
85 uint64_t Address, const void *Decoder);
86 static bool DecodeCPSInstruction(llvm::MCInst &Inst, unsigned Insn,
87 uint64_t Address, const void *Decoder);
88 static bool DecodeAddrModeImm12Operand(llvm::MCInst &Inst, unsigned Val,
89 uint64_t Address, const void *Decoder);
90 static bool DecodeAddrMode5Operand(llvm::MCInst &Inst, unsigned Val,
91 uint64_t Address, const void *Decoder);
92 static bool DecodeAddrMode7Operand(llvm::MCInst &Inst, unsigned Val,
93 uint64_t Address, const void *Decoder);
94 static bool DecodeBranchImmInstruction(llvm::MCInst &Inst, unsigned Insn,
95 uint64_t Address, const void *Decoder);
96 static bool DecodeVCVTImmOperand(llvm::MCInst &Inst, unsigned Val,
97 uint64_t Address, const void *Decoder);
98 static bool DecodeAddrMode6Operand(llvm::MCInst &Inst, unsigned Val,
99 uint64_t Address, const void *Decoder);
100 static bool DecodeVLDInstruction(llvm::MCInst &Inst, unsigned Val,
101 uint64_t Address, const void *Decoder);
102 static bool DecodeVSTInstruction(llvm::MCInst &Inst, unsigned Val,
103 uint64_t Address, const void *Decoder);
104 static bool DecodeVLD1DupInstruction(llvm::MCInst &Inst, unsigned Val,
105 uint64_t Address, const void *Decoder);
106 static bool DecodeVLD2DupInstruction(llvm::MCInst &Inst, unsigned Val,
107 uint64_t Address, const void *Decoder);
108 static bool DecodeVLD3DupInstruction(llvm::MCInst &Inst, unsigned Val,
109 uint64_t Address, const void *Decoder);
110 static bool DecodeVLD4DupInstruction(llvm::MCInst &Inst, unsigned Val,
111 uint64_t Address, const void *Decoder);
112 static bool DecodeNEONModImmInstruction(llvm::MCInst &Inst, unsigned Val,
113 uint64_t Address, const void *Decoder);
114 static bool DecodeVSHLMaxInstruction(llvm::MCInst &Inst, unsigned Val,
115 uint64_t Address, const void *Decoder);
116 static bool DecodeShiftRight8Imm(llvm::MCInst &Inst, unsigned Val,
117 uint64_t Address, const void *Decoder);
118 static bool DecodeShiftRight16Imm(llvm::MCInst &Inst, unsigned Val,
119 uint64_t Address, const void *Decoder);
120 static bool DecodeShiftRight32Imm(llvm::MCInst &Inst, unsigned Val,
121 uint64_t Address, const void *Decoder);
122 static bool DecodeShiftRight64Imm(llvm::MCInst &Inst, unsigned Val,
123 uint64_t Address, const void *Decoder);
124 static bool DecodeTBLInstruction(llvm::MCInst &Inst, unsigned Insn,
125 uint64_t Address, const void *Decoder);
126 static bool DecodeVFPfpImm(llvm::MCInst &Inst, unsigned Val,
127 uint64_t Address, const void *Decoder);
128 static bool DecodePostIdxReg(llvm::MCInst &Inst, unsigned Insn,
129 uint64_t Address, const void *Decoder);
130 static bool DecodeCoprocessor(llvm::MCInst &Inst, unsigned Insn,
131 uint64_t Address, const void *Decoder);
132 static bool DecodeAddrMode3Offset(llvm::MCInst &Inst, unsigned Insn,
133 uint64_t Address, const void *Decoder);
134 static bool DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Insn,
135 uint64_t Address, const void *Decoder);
136 static bool DecodeMSRMask(llvm::MCInst &Inst, unsigned Insn,
137 uint64_t Address, const void *Decoder);
138 static bool DecodeDoubleRegLoad(llvm::MCInst &Inst, unsigned Insn,
139 uint64_t Address, const void *Decoder);
140 static bool DecodeDoubleRegStore(llvm::MCInst &Inst, unsigned Insn,
141 uint64_t Address, const void *Decoder);
142 static bool DecodeSTRPreImm(llvm::MCInst &Inst, unsigned Insn,
143 uint64_t Address, const void *Decoder);
144 static bool DecodeSTRPreReg(llvm::MCInst &Inst, unsigned Insn,
145 uint64_t Address, const void *Decoder);
148 static bool DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn,
149 uint64_t Address, const void *Decoder);
150 static bool DecodeThumbBROperand(llvm::MCInst &Inst, unsigned Val,
151 uint64_t Address, const void *Decoder);
152 static bool DecodeT2BROperand(llvm::MCInst &Inst, unsigned Val,
153 uint64_t Address, const void *Decoder);
154 static bool DecodeThumbCmpBROperand(llvm::MCInst &Inst, unsigned Val,
155 uint64_t Address, const void *Decoder);
156 static bool DecodeThumbAddrModeRR(llvm::MCInst &Inst, unsigned Val,
157 uint64_t Address, const void *Decoder);
158 static bool DecodeThumbAddrModeIS(llvm::MCInst &Inst, unsigned Val,
159 uint64_t Address, const void *Decoder);
160 static bool DecodeThumbAddrModePC(llvm::MCInst &Inst, unsigned Val,
161 uint64_t Address, const void *Decoder);
162 static bool DecodeThumbAddrModeSP(llvm::MCInst &Inst, unsigned Val,
163 uint64_t Address, const void *Decoder);
164 static bool DecodeT2AddrModeSOReg(llvm::MCInst &Inst, unsigned Val,
165 uint64_t Address, const void *Decoder);
166 static bool DecodeT2LoadShift(llvm::MCInst &Inst, unsigned Val,
167 uint64_t Address, const void *Decoder);
168 static bool DecodeT2Imm8S4(llvm::MCInst &Inst, unsigned Val,
169 uint64_t Address, const void *Decoder);
170 static bool DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val,
171 uint64_t Address, const void *Decoder);
172 static bool DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
173 uint64_t Address, const void *Decoder);
174 static bool DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val,
175 uint64_t Address, const void *Decoder);
176 static bool DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Val,
177 uint64_t Address, const void *Decoder);
178 static bool DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn,
179 uint64_t Address, const void *Decoder);
180 static bool DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn,
181 uint64_t Address, const void *Decoder);
182 static bool DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Insn,
183 uint64_t Address, const void *Decoder);
184 static bool DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val,
185 uint64_t Address, const void *Decoder);
186 static bool DecodeThumbSRImm(llvm::MCInst &Inst, unsigned Val,
187 uint64_t Address, const void *Decoder);
188 static bool DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Val,
189 uint64_t Address, const void *Decoder);
190 static bool DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val,
191 uint64_t Address, const void *Decoder);
192 static bool DecodeThumbBCCTargetOperand(llvm::MCInst &Inst, unsigned Val,
193 uint64_t Address, const void *Decoder);
194 static bool DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
195 uint64_t Address, const void *Decoder);
197 #include "ARMGenDisassemblerTables.inc"
198 #include "ARMGenInstrInfo.inc"
199 #include "ARMGenEDInfo.inc"
201 using namespace llvm;
203 static MCDisassembler *createARMDisassembler(const Target &T) {
204 return new ARMDisassembler;
207 static MCDisassembler *createThumbDisassembler(const Target &T) {
208 return new ThumbDisassembler;
211 EDInstInfo *ARMDisassembler::getEDInfo() const {
215 EDInstInfo *ThumbDisassembler::getEDInfo() const {
220 bool ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
221 const MemoryObject &Region,
222 uint64_t Address,raw_ostream &os) const {
225 // We want to read exactly 4 bytes of data.
226 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1)
229 // Encoded as a small-endian 32-bit word in the stream.
230 uint32_t insn = (bytes[3] << 24) |
235 // Calling the auto-generated decoder function.
236 bool result = decodeARMInstruction32(MI, insn, Address, this);
242 // Instructions that are shared between ARM and Thumb modes.
243 // FIXME: This shouldn't really exist. It's an artifact of the
244 // fact that we fail to encode a few instructions properly for Thumb.
246 result = decodeCommonInstruction32(MI, insn, Address, this);
252 // VFP and NEON instructions, similarly, are shared between ARM
255 result = decodeVFPInstruction32(MI, insn, Address, this);
262 result = decodeNEONDataInstruction32(MI, insn, Address, this);
265 // Add a fake predicate operand, because we share these instruction
266 // definitions with Thumb2 where these instructions are predicable.
267 if (!DecodePredicateOperand(MI, 0xE, Address, this)) return false;
272 result = decodeNEONLoadStoreInstruction32(MI, insn, Address, this);
275 // Add a fake predicate operand, because we share these instruction
276 // definitions with Thumb2 where these instructions are predicable.
277 if (!DecodePredicateOperand(MI, 0xE, Address, this)) return false;
282 result = decodeNEONDupInstruction32(MI, insn, Address, this);
285 // Add a fake predicate operand, because we share these instruction
286 // definitions with Thumb2 where these instructions are predicable.
287 if (!DecodePredicateOperand(MI, 0xE, Address, this)) return false;
297 extern MCInstrDesc ARMInsts[];
300 // Thumb1 instructions don't have explicit S bits. Rather, they
301 // implicitly set CPSR. Since it's not represented in the encoding, the
302 // auto-generated decoder won't inject the CPSR operand. We need to fix
303 // that as a post-pass.
304 static void AddThumb1SBit(MCInst &MI, bool InITBlock) {
305 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
306 MCInst::iterator I = MI.begin();
307 for (unsigned i = 0, e = MI.size(); i < e; ++i, ++I) {
308 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) {
309 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
314 if (OpInfo[MI.size()].isOptionalDef() &&
315 OpInfo[MI.size()].RegClass == ARM::CCRRegClassID)
316 MI.insert(MI.end(), MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
319 // Most Thumb instructions don't have explicit predicates in the
320 // encoding, but rather get their predicates from IT context. We need
321 // to fix up the predicate operands using this context information as a
323 void ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
324 // A few instructions actually have predicates encoded in them. Don't
325 // try to overwrite it if we're seeing one of those.
326 switch (MI.getOpcode()) {
334 // If we're in an IT block, base the predicate on that. Otherwise,
335 // assume a predicate of AL.
337 if (!ITBlock.empty()) {
343 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
344 MCInst::iterator I = MI.begin();
345 for (unsigned i = 0, e = MI.size(); i < e; ++i, ++I) {
346 if (OpInfo[i].isPredicate()) {
347 I = MI.insert(I, MCOperand::CreateImm(CC));
350 MI.insert(I, MCOperand::CreateReg(0));
352 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
357 MI.insert(MI.end(), MCOperand::CreateImm(CC));
359 MI.insert(MI.end(), MCOperand::CreateReg(0));
361 MI.insert(MI.end(), MCOperand::CreateReg(ARM::CPSR));
364 // Thumb VFP instructions are a special case. Because we share their
365 // encodings between ARM and Thumb modes, and they are predicable in ARM
366 // mode, the auto-generated decoder will give them an (incorrect)
367 // predicate operand. We need to rewrite these operands based on the IT
368 // context as a post-pass.
369 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
371 if (!ITBlock.empty()) {
377 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
378 MCInst::iterator I = MI.begin();
379 for (unsigned i = 0, e = MI.size(); i < e; ++i, ++I) {
380 if (OpInfo[i].isPredicate() ) {
386 I->setReg(ARM::CPSR);
393 bool ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
394 const MemoryObject &Region,
395 uint64_t Address,raw_ostream &os) const {
398 // We want to read exactly 2 bytes of data.
399 if (Region.readBytes(Address, 2, (uint8_t*)bytes, NULL) == -1)
402 uint16_t insn16 = (bytes[1] << 8) | bytes[0];
403 bool result = decodeThumbInstruction16(MI, insn16, Address, this);
406 bool InITBlock = !ITBlock.empty();
407 AddThumbPredicate(MI);
408 AddThumb1SBit(MI, InITBlock);
413 result = decodeThumb2Instruction16(MI, insn16, Address, this);
416 AddThumbPredicate(MI);
418 // If we find an IT instruction, we need to parse its condition
419 // code and mask operands so that we can apply them correctly
420 // to the subsequent instructions.
421 if (MI.getOpcode() == ARM::t2IT) {
422 unsigned firstcond = MI.getOperand(0).getImm();
423 uint32_t mask = MI.getOperand(1).getImm();
424 unsigned zeros = CountTrailingZeros_32(mask);
427 for (unsigned i = 0; i < 4 - (zeros+1); ++i) {
428 if (firstcond ^ (mask & 1))
429 ITBlock.push_back(firstcond ^ 1);
431 ITBlock.push_back(firstcond);
434 ITBlock.push_back(firstcond);
440 // We want to read exactly 4 bytes of data.
441 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1)
444 uint32_t insn32 = (bytes[3] << 8) |
449 result = decodeThumbInstruction32(MI, insn32, Address, this);
452 bool InITBlock = ITBlock.size();
453 AddThumbPredicate(MI);
454 AddThumb1SBit(MI, InITBlock);
459 result = decodeThumb2Instruction32(MI, insn32, Address, this);
462 AddThumbPredicate(MI);
467 result = decodeCommonInstruction32(MI, insn32, Address, this);
470 AddThumbPredicate(MI);
475 result = decodeVFPInstruction32(MI, insn32, Address, this);
478 UpdateThumbVFPPredicate(MI);
483 if (fieldFromInstruction32(insn32, 24, 4) == 0xF) {
484 uint32_t NEONDataInsn = insn32;
485 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
486 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
487 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
488 result = decodeNEONDataInstruction32(MI, NEONDataInsn, Address, this);
491 AddThumbPredicate(MI);
497 result = decodeNEONLoadStoreInstruction32(MI, insn32, Address, this);
500 AddThumbPredicate(MI);
505 result = decodeNEONDupInstruction32(MI, insn32, Address, this);
508 AddThumbPredicate(MI);
516 extern "C" void LLVMInitializeARMDisassembler() {
517 TargetRegistry::RegisterMCDisassembler(TheARMTarget,
518 createARMDisassembler);
519 TargetRegistry::RegisterMCDisassembler(TheThumbTarget,
520 createThumbDisassembler);
523 static const unsigned GPRDecoderTable[] = {
524 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
525 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
526 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
527 ARM::R12, ARM::SP, ARM::LR, ARM::PC
530 static bool DecodeGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
531 uint64_t Address, const void *Decoder) {
535 unsigned Register = GPRDecoderTable[RegNo];
536 Inst.addOperand(MCOperand::CreateReg(Register));
540 static bool DecodeGPRnopcRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
541 uint64_t Address, const void *Decoder) {
542 if (RegNo == 15) return false;
543 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
546 static bool DecodetGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
547 uint64_t Address, const void *Decoder) {
550 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
553 static bool DecodetcGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
554 uint64_t Address, const void *Decoder) {
555 unsigned Register = 0;
579 Inst.addOperand(MCOperand::CreateReg(Register));
583 static bool DecoderGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
584 uint64_t Address, const void *Decoder) {
585 if (RegNo == 13 || RegNo == 15) return false;
586 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
589 static const unsigned SPRDecoderTable[] = {
590 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
591 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
592 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
593 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
594 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
595 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
596 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
597 ARM::S28, ARM::S29, ARM::S30, ARM::S31
600 static bool DecodeSPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
601 uint64_t Address, const void *Decoder) {
605 unsigned Register = SPRDecoderTable[RegNo];
606 Inst.addOperand(MCOperand::CreateReg(Register));
610 static const unsigned DPRDecoderTable[] = {
611 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
612 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
613 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
614 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
615 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
616 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
617 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
618 ARM::D28, ARM::D29, ARM::D30, ARM::D31
621 static bool DecodeDPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
622 uint64_t Address, const void *Decoder) {
626 unsigned Register = DPRDecoderTable[RegNo];
627 Inst.addOperand(MCOperand::CreateReg(Register));
631 static bool DecodeDPR_8RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
632 uint64_t Address, const void *Decoder) {
635 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
638 static bool DecodeDPR_VFP2RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
639 uint64_t Address, const void *Decoder) {
642 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
645 static const unsigned QPRDecoderTable[] = {
646 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
647 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
648 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
649 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
653 static bool DecodeQPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
654 uint64_t Address, const void *Decoder) {
659 unsigned Register = QPRDecoderTable[RegNo];
660 Inst.addOperand(MCOperand::CreateReg(Register));
664 static bool DecodePredicateOperand(llvm::MCInst &Inst, unsigned Val,
665 uint64_t Address, const void *Decoder) {
666 if (Val == 0xF) return false;
667 // AL predicate is not allowed on Thumb1 branches.
668 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
670 Inst.addOperand(MCOperand::CreateImm(Val));
671 if (Val == ARMCC::AL) {
672 Inst.addOperand(MCOperand::CreateReg(0));
674 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
678 static bool DecodeCCOutOperand(llvm::MCInst &Inst, unsigned Val,
679 uint64_t Address, const void *Decoder) {
681 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
683 Inst.addOperand(MCOperand::CreateReg(0));
687 static bool DecodeSOImmOperand(llvm::MCInst &Inst, unsigned Val,
688 uint64_t Address, const void *Decoder) {
689 uint32_t imm = Val & 0xFF;
690 uint32_t rot = (Val & 0xF00) >> 7;
691 uint32_t rot_imm = (imm >> rot) | (imm << (32-rot));
692 Inst.addOperand(MCOperand::CreateImm(rot_imm));
696 static bool DecodeBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
697 uint64_t Address, const void *Decoder) {
699 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(Val)));
703 static bool DecodeSORegImmOperand(llvm::MCInst &Inst, unsigned Val,
704 uint64_t Address, const void *Decoder) {
706 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
707 unsigned type = fieldFromInstruction32(Val, 5, 2);
708 unsigned imm = fieldFromInstruction32(Val, 7, 5);
710 // Register-immediate
711 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
713 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
729 if (Shift == ARM_AM::ror && imm == 0)
732 unsigned Op = Shift | (imm << 3);
733 Inst.addOperand(MCOperand::CreateImm(Op));
738 static bool DecodeSORegRegOperand(llvm::MCInst &Inst, unsigned Val,
739 uint64_t Address, const void *Decoder) {
741 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
742 unsigned type = fieldFromInstruction32(Val, 5, 2);
743 unsigned Rs = fieldFromInstruction32(Val, 8, 4);
746 if (!DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)) return false;
747 if (!DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)) return false;
749 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
765 Inst.addOperand(MCOperand::CreateImm(Shift));
770 static bool DecodeRegListOperand(llvm::MCInst &Inst, unsigned Val,
771 uint64_t Address, const void *Decoder) {
772 // Empty register lists are not allowed.
773 if (CountPopulation_32(Val) == 0) return false;
774 for (unsigned i = 0; i < 16; ++i) {
775 if (Val & (1 << i)) {
776 if (!DecodeGPRRegisterClass(Inst, i, Address, Decoder)) return false;
783 static bool DecodeSPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
784 uint64_t Address, const void *Decoder) {
785 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
786 unsigned regs = Val & 0xFF;
788 if (!DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)) return false;
789 for (unsigned i = 0; i < (regs - 1); ++i) {
790 if (!DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)) return false;
796 static bool DecodeDPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
797 uint64_t Address, const void *Decoder) {
798 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
799 unsigned regs = (Val & 0xFF) / 2;
801 if (!DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)) return false;
802 for (unsigned i = 0; i < (regs - 1); ++i) {
803 if (!DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)) return false;
809 static bool DecodeBitfieldMaskOperand(llvm::MCInst &Inst, unsigned Val,
810 uint64_t Address, const void *Decoder) {
811 // This operand encodes a mask of contiguous zeros between a specified MSB
812 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
813 // the mask of all bits LSB-and-lower, and then xor them to create
814 // the mask of that's all ones on [msb, lsb]. Finally we not it to
815 // create the final mask.
816 unsigned msb = fieldFromInstruction32(Val, 5, 5);
817 unsigned lsb = fieldFromInstruction32(Val, 0, 5);
818 uint32_t msb_mask = (1 << (msb+1)) - 1;
819 uint32_t lsb_mask = (1 << lsb) - 1;
820 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
824 static bool DecodeCopMemInstruction(llvm::MCInst &Inst, unsigned Insn,
825 uint64_t Address, const void *Decoder) {
826 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
827 unsigned CRd = fieldFromInstruction32(Insn, 12, 4);
828 unsigned coproc = fieldFromInstruction32(Insn, 8, 4);
829 unsigned imm = fieldFromInstruction32(Insn, 0, 8);
830 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
831 unsigned U = fieldFromInstruction32(Insn, 23, 1);
833 switch (Inst.getOpcode()) {
834 case ARM::LDC_OFFSET:
837 case ARM::LDC_OPTION:
838 case ARM::LDCL_OFFSET:
841 case ARM::LDCL_OPTION:
842 case ARM::STC_OFFSET:
845 case ARM::STC_OPTION:
846 case ARM::STCL_OFFSET:
849 case ARM::STCL_OPTION:
850 if (coproc == 0xA || coproc == 0xB)
857 Inst.addOperand(MCOperand::CreateImm(coproc));
858 Inst.addOperand(MCOperand::CreateImm(CRd));
859 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
860 switch (Inst.getOpcode()) {
861 case ARM::LDC_OPTION:
862 case ARM::LDCL_OPTION:
863 case ARM::LDC2_OPTION:
864 case ARM::LDC2L_OPTION:
865 case ARM::STC_OPTION:
866 case ARM::STCL_OPTION:
867 case ARM::STC2_OPTION:
868 case ARM::STC2L_OPTION:
873 Inst.addOperand(MCOperand::CreateReg(0));
877 unsigned P = fieldFromInstruction32(Insn, 24, 1);
878 unsigned W = fieldFromInstruction32(Insn, 21, 1);
880 bool writeback = (P == 0) || (W == 1);
881 unsigned idx_mode = 0;
883 idx_mode = ARMII::IndexModePre;
884 else if (!P && writeback)
885 idx_mode = ARMII::IndexModePost;
887 switch (Inst.getOpcode()) {
891 case ARM::LDC_OPTION:
892 case ARM::LDCL_OPTION:
893 case ARM::LDC2_OPTION:
894 case ARM::LDC2L_OPTION:
895 case ARM::STC_OPTION:
896 case ARM::STCL_OPTION:
897 case ARM::STC2_OPTION:
898 case ARM::STC2L_OPTION:
899 Inst.addOperand(MCOperand::CreateImm(imm));
903 Inst.addOperand(MCOperand::CreateImm(
904 ARM_AM::getAM2Opc(ARM_AM::add, imm, ARM_AM::lsl, idx_mode)));
906 Inst.addOperand(MCOperand::CreateImm(
907 ARM_AM::getAM2Opc(ARM_AM::sub, imm, ARM_AM::lsl, idx_mode)));
911 switch (Inst.getOpcode()) {
912 case ARM::LDC_OFFSET:
915 case ARM::LDC_OPTION:
916 case ARM::LDCL_OFFSET:
919 case ARM::LDCL_OPTION:
920 case ARM::STC_OFFSET:
923 case ARM::STC_OPTION:
924 case ARM::STCL_OFFSET:
927 case ARM::STCL_OPTION:
928 if (!DecodePredicateOperand(Inst, pred, Address, Decoder)) return false;
937 static bool DecodeAddrMode2IdxInstruction(llvm::MCInst &Inst, unsigned Insn,
938 uint64_t Address, const void *Decoder) {
939 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
940 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
941 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
942 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
943 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
944 unsigned reg = fieldFromInstruction32(Insn, 25, 1);
945 unsigned P = fieldFromInstruction32(Insn, 24, 1);
946 unsigned W = fieldFromInstruction32(Insn, 21, 1);
948 // On stores, the writeback operand precedes Rt.
949 switch (Inst.getOpcode()) {
950 case ARM::STR_POST_IMM:
951 case ARM::STR_POST_REG:
952 case ARM::STRB_POST_IMM:
953 case ARM::STRB_POST_REG:
954 case ARM::STRT_POST_REG:
955 case ARM::STRT_POST_IMM:
956 case ARM::STRBT_POST_REG:
957 case ARM::STRBT_POST_IMM:
958 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
964 if (!DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)) return false;
966 // On loads, the writeback operand comes after Rt.
967 switch (Inst.getOpcode()) {
968 case ARM::LDR_POST_IMM:
969 case ARM::LDR_POST_REG:
970 case ARM::LDRB_POST_IMM:
971 case ARM::LDRB_POST_REG:
973 case ARM::LDRBT_POST_REG:
974 case ARM::LDRBT_POST_IMM:
975 case ARM::LDRT_POST_REG:
976 case ARM::LDRT_POST_IMM:
977 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))
984 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
986 ARM_AM::AddrOpc Op = ARM_AM::add;
987 if (!fieldFromInstruction32(Insn, 23, 1))
990 bool writeback = (P == 0) || (W == 1);
991 unsigned idx_mode = 0;
993 idx_mode = ARMII::IndexModePre;
994 else if (!P && writeback)
995 idx_mode = ARMII::IndexModePost;
997 if (writeback && (Rn == 15 || Rn == Rt)) return false; // UNPREDICTABLE
1000 if (!DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)) return false;
1001 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1002 switch( fieldFromInstruction32(Insn, 5, 2)) {
1018 unsigned amt = fieldFromInstruction32(Insn, 7, 5);
1019 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1021 Inst.addOperand(MCOperand::CreateImm(imm));
1023 Inst.addOperand(MCOperand::CreateReg(0));
1024 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1025 Inst.addOperand(MCOperand::CreateImm(tmp));
1028 if (!DecodePredicateOperand(Inst, pred, Address, Decoder)) return false;
1033 static bool DecodeSORegMemOperand(llvm::MCInst &Inst, unsigned Val,
1034 uint64_t Address, const void *Decoder) {
1035 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1036 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1037 unsigned type = fieldFromInstruction32(Val, 5, 2);
1038 unsigned imm = fieldFromInstruction32(Val, 7, 5);
1039 unsigned U = fieldFromInstruction32(Val, 12, 1);
1041 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1057 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1058 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
1061 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1063 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1064 Inst.addOperand(MCOperand::CreateImm(shift));
1069 static bool DecodeAddrMode3Instruction(llvm::MCInst &Inst, unsigned Insn,
1070 uint64_t Address, const void *Decoder) {
1071 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1072 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1073 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1074 unsigned type = fieldFromInstruction32(Insn, 22, 1);
1075 unsigned imm = fieldFromInstruction32(Insn, 8, 4);
1076 unsigned U = ((~fieldFromInstruction32(Insn, 23, 1)) & 1) << 8;
1077 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1078 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1079 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1081 bool writeback = (W == 1) | (P == 0);
1082 if (writeback) { // Writeback
1084 U |= ARMII::IndexModePre << 9;
1086 U |= ARMII::IndexModePost << 9;
1088 // On stores, the writeback operand precedes Rt.
1089 switch (Inst.getOpcode()) {
1092 case ARM::STRD_POST:
1095 case ARM::STRH_POST:
1096 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))
1104 if (!DecodeGPRRegisterClass(Inst, Rt, Address, Decoder))
1106 switch (Inst.getOpcode()) {
1109 case ARM::STRD_POST:
1112 case ARM::LDRD_POST:
1113 if (!DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder))
1121 // On loads, the writeback operand comes after Rt.
1122 switch (Inst.getOpcode()) {
1125 case ARM::LDRD_POST:
1128 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))
1136 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))
1140 Inst.addOperand(MCOperand::CreateReg(0));
1141 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1143 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))
1145 Inst.addOperand(MCOperand::CreateImm(U));
1148 if (!DecodePredicateOperand(Inst, pred, Address, Decoder)) return false;
1153 static bool DecodeRFEInstruction(llvm::MCInst &Inst, unsigned Insn,
1154 uint64_t Address, const void *Decoder) {
1155 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1156 unsigned mode = fieldFromInstruction32(Insn, 23, 2);
1173 Inst.addOperand(MCOperand::CreateImm(mode));
1174 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1179 static bool DecodeMemMultipleWritebackInstruction(llvm::MCInst &Inst,
1181 uint64_t Address, const void *Decoder) {
1182 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1183 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1184 unsigned reglist = fieldFromInstruction32(Insn, 0, 16);
1187 switch (Inst.getOpcode()) {
1189 Inst.setOpcode(ARM::RFEDA);
1191 case ARM::STMDA_UPD:
1192 Inst.setOpcode(ARM::RFEDA_UPD);
1195 Inst.setOpcode(ARM::RFEDB);
1197 case ARM::STMDB_UPD:
1198 Inst.setOpcode(ARM::RFEDB_UPD);
1201 Inst.setOpcode(ARM::RFEIA);
1203 case ARM::STMIA_UPD:
1204 Inst.setOpcode(ARM::RFEIA_UPD);
1207 Inst.setOpcode(ARM::RFEIB);
1209 case ARM::STMIB_UPD:
1210 Inst.setOpcode(ARM::RFEIB_UPD);
1213 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1216 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder) ||
1217 !DecodeGPRRegisterClass(Inst, Rn, Address, Decoder) || // Tied
1218 !DecodePredicateOperand(Inst, pred, Address, Decoder) ||
1219 !DecodeRegListOperand(Inst, reglist, Address, Decoder))
1225 static bool DecodeCPSInstruction(llvm::MCInst &Inst, unsigned Insn,
1226 uint64_t Address, const void *Decoder) {
1227 unsigned imod = fieldFromInstruction32(Insn, 18, 2);
1228 unsigned M = fieldFromInstruction32(Insn, 17, 1);
1229 unsigned iflags = fieldFromInstruction32(Insn, 6, 3);
1230 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1232 // imod == '01' --> UNPREDICTABLE
1233 if (imod == 1) return false;
1235 if (M && mode && imod && iflags) {
1236 Inst.setOpcode(ARM::CPS3p);
1237 Inst.addOperand(MCOperand::CreateImm(imod));
1238 Inst.addOperand(MCOperand::CreateImm(iflags));
1239 Inst.addOperand(MCOperand::CreateImm(mode));
1241 } else if (!mode && !M) {
1242 Inst.setOpcode(ARM::CPS2p);
1243 Inst.addOperand(MCOperand::CreateImm(imod));
1244 Inst.addOperand(MCOperand::CreateImm(iflags));
1246 } else if (!imod && !iflags && M) {
1247 Inst.setOpcode(ARM::CPS1p);
1248 Inst.addOperand(MCOperand::CreateImm(mode));
1255 static bool DecodeSMLAInstruction(llvm::MCInst &Inst, unsigned Insn,
1256 uint64_t Address, const void *Decoder) {
1257 unsigned Rd = fieldFromInstruction32(Insn, 16, 4);
1258 unsigned Rn = fieldFromInstruction32(Insn, 0, 4);
1259 unsigned Rm = fieldFromInstruction32(Insn, 8, 4);
1260 unsigned Ra = fieldFromInstruction32(Insn, 12, 4);
1261 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1264 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
1266 if (!DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder) ||
1267 !DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder) ||
1268 !DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder) ||
1269 !DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder))
1272 if (!DecodePredicateOperand(Inst, pred, Address, Decoder)) return false;
1277 static bool DecodeAddrModeImm12Operand(llvm::MCInst &Inst, unsigned Val,
1278 uint64_t Address, const void *Decoder) {
1279 unsigned add = fieldFromInstruction32(Val, 12, 1);
1280 unsigned imm = fieldFromInstruction32(Val, 0, 12);
1281 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1283 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))
1286 if (!add) imm *= -1;
1287 if (imm == 0 && !add) imm = INT32_MIN;
1288 Inst.addOperand(MCOperand::CreateImm(imm));
1293 static bool DecodeAddrMode5Operand(llvm::MCInst &Inst, unsigned Val,
1294 uint64_t Address, const void *Decoder) {
1295 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
1296 unsigned U = fieldFromInstruction32(Val, 8, 1);
1297 unsigned imm = fieldFromInstruction32(Val, 0, 8);
1299 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))
1303 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
1305 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
1310 static bool DecodeAddrMode7Operand(llvm::MCInst &Inst, unsigned Val,
1311 uint64_t Address, const void *Decoder) {
1312 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
1315 static bool DecodeBranchImmInstruction(llvm::MCInst &Inst, unsigned Insn,
1316 uint64_t Address, const void *Decoder) {
1317 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1318 unsigned imm = fieldFromInstruction32(Insn, 0, 24) << 2;
1321 Inst.setOpcode(ARM::BLXi);
1322 imm |= fieldFromInstruction32(Insn, 24, 1) << 1;
1323 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1327 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1328 if (!DecodePredicateOperand(Inst, pred, Address, Decoder)) return false;
1334 static bool DecodeVCVTImmOperand(llvm::MCInst &Inst, unsigned Val,
1335 uint64_t Address, const void *Decoder) {
1336 Inst.addOperand(MCOperand::CreateImm(64 - Val));
1340 static bool DecodeAddrMode6Operand(llvm::MCInst &Inst, unsigned Val,
1341 uint64_t Address, const void *Decoder) {
1342 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1343 unsigned align = fieldFromInstruction32(Val, 4, 2);
1345 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))
1348 Inst.addOperand(MCOperand::CreateImm(0));
1350 Inst.addOperand(MCOperand::CreateImm(4 << align));
1355 static bool DecodeVLDInstruction(llvm::MCInst &Inst, unsigned Insn,
1356 uint64_t Address, const void *Decoder) {
1357 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1358 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1359 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
1360 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1361 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
1362 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1364 // First output register
1365 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
1367 // Second output register
1368 switch (Inst.getOpcode()) {
1373 case ARM::VLD1q8_UPD:
1374 case ARM::VLD1q16_UPD:
1375 case ARM::VLD1q32_UPD:
1376 case ARM::VLD1q64_UPD:
1381 case ARM::VLD1d8T_UPD:
1382 case ARM::VLD1d16T_UPD:
1383 case ARM::VLD1d32T_UPD:
1384 case ARM::VLD1d64T_UPD:
1389 case ARM::VLD1d8Q_UPD:
1390 case ARM::VLD1d16Q_UPD:
1391 case ARM::VLD1d32Q_UPD:
1392 case ARM::VLD1d64Q_UPD:
1396 case ARM::VLD2d8_UPD:
1397 case ARM::VLD2d16_UPD:
1398 case ARM::VLD2d32_UPD:
1402 case ARM::VLD2q8_UPD:
1403 case ARM::VLD2q16_UPD:
1404 case ARM::VLD2q32_UPD:
1408 case ARM::VLD3d8_UPD:
1409 case ARM::VLD3d16_UPD:
1410 case ARM::VLD3d32_UPD:
1414 case ARM::VLD4d8_UPD:
1415 case ARM::VLD4d16_UPD:
1416 case ARM::VLD4d32_UPD:
1417 if (!DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)) return false;
1422 case ARM::VLD2b8_UPD:
1423 case ARM::VLD2b16_UPD:
1424 case ARM::VLD2b32_UPD:
1428 case ARM::VLD3q8_UPD:
1429 case ARM::VLD3q16_UPD:
1430 case ARM::VLD3q32_UPD:
1434 case ARM::VLD4q8_UPD:
1435 case ARM::VLD4q16_UPD:
1436 case ARM::VLD4q32_UPD:
1437 if (!DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)) return false;
1442 // Third output register
1443 switch(Inst.getOpcode()) {
1448 case ARM::VLD1d8T_UPD:
1449 case ARM::VLD1d16T_UPD:
1450 case ARM::VLD1d32T_UPD:
1451 case ARM::VLD1d64T_UPD:
1456 case ARM::VLD1d8Q_UPD:
1457 case ARM::VLD1d16Q_UPD:
1458 case ARM::VLD1d32Q_UPD:
1459 case ARM::VLD1d64Q_UPD:
1463 case ARM::VLD2q8_UPD:
1464 case ARM::VLD2q16_UPD:
1465 case ARM::VLD2q32_UPD:
1469 case ARM::VLD3d8_UPD:
1470 case ARM::VLD3d16_UPD:
1471 case ARM::VLD3d32_UPD:
1475 case ARM::VLD4d8_UPD:
1476 case ARM::VLD4d16_UPD:
1477 case ARM::VLD4d32_UPD:
1478 if (!DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)) return false;
1483 case ARM::VLD3q8_UPD:
1484 case ARM::VLD3q16_UPD:
1485 case ARM::VLD3q32_UPD:
1489 case ARM::VLD4q8_UPD:
1490 case ARM::VLD4q16_UPD:
1491 case ARM::VLD4q32_UPD:
1492 if (!DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)) return false;
1498 // Fourth output register
1499 switch (Inst.getOpcode()) {
1504 case ARM::VLD1d8Q_UPD:
1505 case ARM::VLD1d16Q_UPD:
1506 case ARM::VLD1d32Q_UPD:
1507 case ARM::VLD1d64Q_UPD:
1511 case ARM::VLD2q8_UPD:
1512 case ARM::VLD2q16_UPD:
1513 case ARM::VLD2q32_UPD:
1517 case ARM::VLD4d8_UPD:
1518 case ARM::VLD4d16_UPD:
1519 case ARM::VLD4d32_UPD:
1520 if (!DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)) return false;
1525 case ARM::VLD4q8_UPD:
1526 case ARM::VLD4q16_UPD:
1527 case ARM::VLD4q32_UPD:
1528 if (!DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)) return false;
1534 // Writeback operand
1535 switch (Inst.getOpcode()) {
1536 case ARM::VLD1d8_UPD:
1537 case ARM::VLD1d16_UPD:
1538 case ARM::VLD1d32_UPD:
1539 case ARM::VLD1d64_UPD:
1540 case ARM::VLD1q8_UPD:
1541 case ARM::VLD1q16_UPD:
1542 case ARM::VLD1q32_UPD:
1543 case ARM::VLD1q64_UPD:
1544 case ARM::VLD1d8T_UPD:
1545 case ARM::VLD1d16T_UPD:
1546 case ARM::VLD1d32T_UPD:
1547 case ARM::VLD1d64T_UPD:
1548 case ARM::VLD1d8Q_UPD:
1549 case ARM::VLD1d16Q_UPD:
1550 case ARM::VLD1d32Q_UPD:
1551 case ARM::VLD1d64Q_UPD:
1552 case ARM::VLD2d8_UPD:
1553 case ARM::VLD2d16_UPD:
1554 case ARM::VLD2d32_UPD:
1555 case ARM::VLD2q8_UPD:
1556 case ARM::VLD2q16_UPD:
1557 case ARM::VLD2q32_UPD:
1558 case ARM::VLD2b8_UPD:
1559 case ARM::VLD2b16_UPD:
1560 case ARM::VLD2b32_UPD:
1561 case ARM::VLD3d8_UPD:
1562 case ARM::VLD3d16_UPD:
1563 case ARM::VLD3d32_UPD:
1564 case ARM::VLD3q8_UPD:
1565 case ARM::VLD3q16_UPD:
1566 case ARM::VLD3q32_UPD:
1567 case ARM::VLD4d8_UPD:
1568 case ARM::VLD4d16_UPD:
1569 case ARM::VLD4d32_UPD:
1570 case ARM::VLD4q8_UPD:
1571 case ARM::VLD4q16_UPD:
1572 case ARM::VLD4q32_UPD:
1573 if (!DecodeGPRRegisterClass(Inst, wb, Address, Decoder)) return false;
1579 // AddrMode6 Base (register+alignment)
1580 if (!DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)) return false;
1582 // AddrMode6 Offset (register)
1584 Inst.addOperand(MCOperand::CreateReg(0));
1585 else if (Rm != 0xF) {
1586 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))
1593 static bool DecodeVSTInstruction(llvm::MCInst &Inst, unsigned Insn,
1594 uint64_t Address, const void *Decoder) {
1595 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1596 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1597 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
1598 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1599 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
1600 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1602 // Writeback Operand
1603 switch (Inst.getOpcode()) {
1604 case ARM::VST1d8_UPD:
1605 case ARM::VST1d16_UPD:
1606 case ARM::VST1d32_UPD:
1607 case ARM::VST1d64_UPD:
1608 case ARM::VST1q8_UPD:
1609 case ARM::VST1q16_UPD:
1610 case ARM::VST1q32_UPD:
1611 case ARM::VST1q64_UPD:
1612 case ARM::VST1d8T_UPD:
1613 case ARM::VST1d16T_UPD:
1614 case ARM::VST1d32T_UPD:
1615 case ARM::VST1d64T_UPD:
1616 case ARM::VST1d8Q_UPD:
1617 case ARM::VST1d16Q_UPD:
1618 case ARM::VST1d32Q_UPD:
1619 case ARM::VST1d64Q_UPD:
1620 case ARM::VST2d8_UPD:
1621 case ARM::VST2d16_UPD:
1622 case ARM::VST2d32_UPD:
1623 case ARM::VST2q8_UPD:
1624 case ARM::VST2q16_UPD:
1625 case ARM::VST2q32_UPD:
1626 case ARM::VST2b8_UPD:
1627 case ARM::VST2b16_UPD:
1628 case ARM::VST2b32_UPD:
1629 case ARM::VST3d8_UPD:
1630 case ARM::VST3d16_UPD:
1631 case ARM::VST3d32_UPD:
1632 case ARM::VST3q8_UPD:
1633 case ARM::VST3q16_UPD:
1634 case ARM::VST3q32_UPD:
1635 case ARM::VST4d8_UPD:
1636 case ARM::VST4d16_UPD:
1637 case ARM::VST4d32_UPD:
1638 case ARM::VST4q8_UPD:
1639 case ARM::VST4q16_UPD:
1640 case ARM::VST4q32_UPD:
1641 if (!DecodeGPRRegisterClass(Inst, wb, Address, Decoder))
1648 // AddrMode6 Base (register+alignment)
1649 if (!DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)) return false;
1651 // AddrMode6 Offset (register)
1653 Inst.addOperand(MCOperand::CreateReg(0));
1654 else if (Rm != 0xF) {
1655 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
1658 // First input register
1659 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
1661 // Second input register
1662 switch (Inst.getOpcode()) {
1667 case ARM::VST1q8_UPD:
1668 case ARM::VST1q16_UPD:
1669 case ARM::VST1q32_UPD:
1670 case ARM::VST1q64_UPD:
1675 case ARM::VST1d8T_UPD:
1676 case ARM::VST1d16T_UPD:
1677 case ARM::VST1d32T_UPD:
1678 case ARM::VST1d64T_UPD:
1683 case ARM::VST1d8Q_UPD:
1684 case ARM::VST1d16Q_UPD:
1685 case ARM::VST1d32Q_UPD:
1686 case ARM::VST1d64Q_UPD:
1690 case ARM::VST2d8_UPD:
1691 case ARM::VST2d16_UPD:
1692 case ARM::VST2d32_UPD:
1696 case ARM::VST2q8_UPD:
1697 case ARM::VST2q16_UPD:
1698 case ARM::VST2q32_UPD:
1702 case ARM::VST3d8_UPD:
1703 case ARM::VST3d16_UPD:
1704 case ARM::VST3d32_UPD:
1708 case ARM::VST4d8_UPD:
1709 case ARM::VST4d16_UPD:
1710 case ARM::VST4d32_UPD:
1711 if (!DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)) return false;
1716 case ARM::VST2b8_UPD:
1717 case ARM::VST2b16_UPD:
1718 case ARM::VST2b32_UPD:
1722 case ARM::VST3q8_UPD:
1723 case ARM::VST3q16_UPD:
1724 case ARM::VST3q32_UPD:
1728 case ARM::VST4q8_UPD:
1729 case ARM::VST4q16_UPD:
1730 case ARM::VST4q32_UPD:
1731 if (!DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)) return false;
1737 // Third input register
1738 switch (Inst.getOpcode()) {
1743 case ARM::VST1d8T_UPD:
1744 case ARM::VST1d16T_UPD:
1745 case ARM::VST1d32T_UPD:
1746 case ARM::VST1d64T_UPD:
1751 case ARM::VST1d8Q_UPD:
1752 case ARM::VST1d16Q_UPD:
1753 case ARM::VST1d32Q_UPD:
1754 case ARM::VST1d64Q_UPD:
1758 case ARM::VST2q8_UPD:
1759 case ARM::VST2q16_UPD:
1760 case ARM::VST2q32_UPD:
1764 case ARM::VST3d8_UPD:
1765 case ARM::VST3d16_UPD:
1766 case ARM::VST3d32_UPD:
1770 case ARM::VST4d8_UPD:
1771 case ARM::VST4d16_UPD:
1772 case ARM::VST4d32_UPD:
1773 if (!DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)) return false;
1778 case ARM::VST3q8_UPD:
1779 case ARM::VST3q16_UPD:
1780 case ARM::VST3q32_UPD:
1784 case ARM::VST4q8_UPD:
1785 case ARM::VST4q16_UPD:
1786 case ARM::VST4q32_UPD:
1787 if (!DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)) return false;
1793 // Fourth input register
1794 switch (Inst.getOpcode()) {
1799 case ARM::VST1d8Q_UPD:
1800 case ARM::VST1d16Q_UPD:
1801 case ARM::VST1d32Q_UPD:
1802 case ARM::VST1d64Q_UPD:
1806 case ARM::VST2q8_UPD:
1807 case ARM::VST2q16_UPD:
1808 case ARM::VST2q32_UPD:
1812 case ARM::VST4d8_UPD:
1813 case ARM::VST4d16_UPD:
1814 case ARM::VST4d32_UPD:
1815 if (!DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)) return false;
1820 case ARM::VST4q8_UPD:
1821 case ARM::VST4q16_UPD:
1822 case ARM::VST4q32_UPD:
1823 if (!DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)) return false;
1832 static bool DecodeVLD1DupInstruction(llvm::MCInst &Inst, unsigned Insn,
1833 uint64_t Address, const void *Decoder) {
1834 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1835 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1836 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1837 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1838 unsigned align = fieldFromInstruction32(Insn, 4, 1);
1839 unsigned size = fieldFromInstruction32(Insn, 6, 2);
1840 unsigned regs = fieldFromInstruction32(Insn, 5, 1) + 1;
1842 align *= (1 << size);
1844 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
1846 if (!DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)) return false;
1849 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1852 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1853 Inst.addOperand(MCOperand::CreateImm(align));
1856 Inst.addOperand(MCOperand::CreateReg(0));
1857 else if (Rm != 0xF) {
1858 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
1864 static bool DecodeVLD2DupInstruction(llvm::MCInst &Inst, unsigned Insn,
1865 uint64_t Address, const void *Decoder) {
1866 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1867 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1868 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1869 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1870 unsigned align = fieldFromInstruction32(Insn, 4, 1);
1871 unsigned size = 1 << fieldFromInstruction32(Insn, 6, 2);
1872 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
1875 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
1876 if (!DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)) return false;
1878 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1881 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1882 Inst.addOperand(MCOperand::CreateImm(align));
1885 Inst.addOperand(MCOperand::CreateReg(0));
1886 else if (Rm != 0xF) {
1887 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
1893 static bool DecodeVLD3DupInstruction(llvm::MCInst &Inst, unsigned Insn,
1894 uint64_t Address, const void *Decoder) {
1895 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1896 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1897 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1898 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1899 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
1901 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder) ||
1902 !DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder) ||
1903 !DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder))
1906 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1909 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1910 Inst.addOperand(MCOperand::CreateImm(0));
1913 Inst.addOperand(MCOperand::CreateReg(0));
1914 else if (Rm != 0xF) {
1915 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
1921 static bool DecodeVLD4DupInstruction(llvm::MCInst &Inst, unsigned Insn,
1922 uint64_t Address, const void *Decoder) {
1923 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1924 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1925 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1926 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1927 unsigned size = fieldFromInstruction32(Insn, 6, 2);
1928 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
1929 unsigned align = fieldFromInstruction32(Insn, 4, 1);
1944 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder) ||
1945 !DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder) ||
1946 !DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder) ||
1947 !DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder))
1950 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1953 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1954 Inst.addOperand(MCOperand::CreateImm(align));
1957 Inst.addOperand(MCOperand::CreateReg(0));
1958 else if (Rm != 0xF) {
1959 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
1965 static bool DecodeNEONModImmInstruction(llvm::MCInst &Inst, unsigned Insn,
1966 uint64_t Address, const void *Decoder) {
1967 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1968 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1969 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
1970 imm |= fieldFromInstruction32(Insn, 16, 3) << 4;
1971 imm |= fieldFromInstruction32(Insn, 24, 1) << 7;
1972 imm |= fieldFromInstruction32(Insn, 8, 4) << 8;
1973 imm |= fieldFromInstruction32(Insn, 5, 1) << 12;
1974 unsigned Q = fieldFromInstruction32(Insn, 6, 1);
1977 if (!DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
1979 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
1982 Inst.addOperand(MCOperand::CreateImm(imm));
1984 switch (Inst.getOpcode()) {
1985 case ARM::VORRiv4i16:
1986 case ARM::VORRiv2i32:
1987 case ARM::VBICiv4i16:
1988 case ARM::VBICiv2i32:
1989 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
1991 case ARM::VORRiv8i16:
1992 case ARM::VORRiv4i32:
1993 case ARM::VBICiv8i16:
1994 case ARM::VBICiv4i32:
1995 if (!DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
2004 static bool DecodeVSHLMaxInstruction(llvm::MCInst &Inst, unsigned Insn,
2005 uint64_t Address, const void *Decoder) {
2006 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2007 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2008 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2009 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2010 unsigned size = fieldFromInstruction32(Insn, 18, 2);
2012 if (!DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
2013 if (!DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
2014 Inst.addOperand(MCOperand::CreateImm(8 << size));
2019 static bool DecodeShiftRight8Imm(llvm::MCInst &Inst, unsigned Val,
2020 uint64_t Address, const void *Decoder) {
2021 Inst.addOperand(MCOperand::CreateImm(8 - Val));
2025 static bool DecodeShiftRight16Imm(llvm::MCInst &Inst, unsigned Val,
2026 uint64_t Address, const void *Decoder) {
2027 Inst.addOperand(MCOperand::CreateImm(16 - Val));
2031 static bool DecodeShiftRight32Imm(llvm::MCInst &Inst, unsigned Val,
2032 uint64_t Address, const void *Decoder) {
2033 Inst.addOperand(MCOperand::CreateImm(32 - Val));
2037 static bool DecodeShiftRight64Imm(llvm::MCInst &Inst, unsigned Val,
2038 uint64_t Address, const void *Decoder) {
2039 Inst.addOperand(MCOperand::CreateImm(64 - Val));
2043 static bool DecodeTBLInstruction(llvm::MCInst &Inst, unsigned Insn,
2044 uint64_t Address, const void *Decoder) {
2045 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2046 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2047 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2048 Rn |= fieldFromInstruction32(Insn, 7, 1) << 4;
2049 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2050 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2051 unsigned op = fieldFromInstruction32(Insn, 6, 1);
2052 unsigned length = fieldFromInstruction32(Insn, 8, 2) + 1;
2054 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
2056 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)) return false; // Writeback
2059 for (unsigned i = 0; i < length; ++i) {
2060 if (!DecodeDPRRegisterClass(Inst, (Rn+i)%32, Address, Decoder)) return false;
2063 if (!DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
2068 static bool DecodeVFPfpImm(llvm::MCInst &Inst, unsigned Val,
2069 uint64_t Address, const void *Decoder) {
2070 // The immediate needs to be a fully instantiated float. However, the
2071 // auto-generated decoder is only able to fill in some of the bits
2072 // necessary. For instance, the 'b' bit is replicated multiple times,
2073 // and is even present in inverted form in one bit. We do a little
2074 // binary parsing here to fill in those missing bits, and then
2075 // reinterpret it all as a float.
2081 fp_conv.integer = Val;
2082 uint32_t b = fieldFromInstruction32(Val, 25, 1);
2083 fp_conv.integer |= b << 26;
2084 fp_conv.integer |= b << 27;
2085 fp_conv.integer |= b << 28;
2086 fp_conv.integer |= b << 29;
2087 fp_conv.integer |= (~b & 0x1) << 30;
2089 Inst.addOperand(MCOperand::CreateFPImm(fp_conv.fp));
2093 static bool DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn,
2094 uint64_t Address, const void *Decoder) {
2095 unsigned dst = fieldFromInstruction16(Insn, 8, 3);
2096 unsigned imm = fieldFromInstruction16(Insn, 0, 8);
2098 if (!DecodetGPRRegisterClass(Inst, dst, Address, Decoder)) return false;
2100 if (Inst.getOpcode() == ARM::tADR)
2101 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
2102 else if (Inst.getOpcode() == ARM::tADDrSPi)
2103 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2107 Inst.addOperand(MCOperand::CreateImm(imm));
2111 static bool DecodeThumbBROperand(llvm::MCInst &Inst, unsigned Val,
2112 uint64_t Address, const void *Decoder) {
2113 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
2117 static bool DecodeT2BROperand(llvm::MCInst &Inst, unsigned Val,
2118 uint64_t Address, const void *Decoder) {
2119 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
2123 static bool DecodeThumbCmpBROperand(llvm::MCInst &Inst, unsigned Val,
2124 uint64_t Address, const void *Decoder) {
2125 Inst.addOperand(MCOperand::CreateImm(SignExtend32<7>(Val << 1)));
2129 static bool DecodeThumbAddrModeRR(llvm::MCInst &Inst, unsigned Val,
2130 uint64_t Address, const void *Decoder) {
2131 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2132 unsigned Rm = fieldFromInstruction32(Val, 3, 3);
2134 if (!DecodetGPRRegisterClass(Inst, Rn, Address, Decoder) ||
2135 !DecodetGPRRegisterClass(Inst, Rm, Address, Decoder))
2141 static bool DecodeThumbAddrModeIS(llvm::MCInst &Inst, unsigned Val,
2142 uint64_t Address, const void *Decoder) {
2143 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2144 unsigned imm = fieldFromInstruction32(Val, 3, 5);
2146 if (!DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
2147 Inst.addOperand(MCOperand::CreateImm(imm));
2152 static bool DecodeThumbAddrModePC(llvm::MCInst &Inst, unsigned Val,
2153 uint64_t Address, const void *Decoder) {
2154 Inst.addOperand(MCOperand::CreateImm(Val << 2));
2159 static bool DecodeThumbAddrModeSP(llvm::MCInst &Inst, unsigned Val,
2160 uint64_t Address, const void *Decoder) {
2161 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2162 Inst.addOperand(MCOperand::CreateImm(Val << 2));
2167 static bool DecodeT2AddrModeSOReg(llvm::MCInst &Inst, unsigned Val,
2168 uint64_t Address, const void *Decoder) {
2169 unsigned Rn = fieldFromInstruction32(Val, 6, 4);
2170 unsigned Rm = fieldFromInstruction32(Val, 2, 4);
2171 unsigned imm = fieldFromInstruction32(Val, 0, 2);
2173 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder) ||
2174 !DecoderGPRRegisterClass(Inst, Rm, Address, Decoder))
2176 Inst.addOperand(MCOperand::CreateImm(imm));
2181 static bool DecodeT2LoadShift(llvm::MCInst &Inst, unsigned Insn,
2182 uint64_t Address, const void *Decoder) {
2183 if (Inst.getOpcode() != ARM::t2PLDs) {
2184 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2185 if (!DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)) return false;
2188 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2190 switch (Inst.getOpcode()) {
2192 Inst.setOpcode(ARM::t2LDRBpci);
2195 Inst.setOpcode(ARM::t2LDRHpci);
2198 Inst.setOpcode(ARM::t2LDRSHpci);
2201 Inst.setOpcode(ARM::t2LDRSBpci);
2204 Inst.setOpcode(ARM::t2PLDi12);
2205 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
2211 int imm = fieldFromInstruction32(Insn, 0, 12);
2212 if (!fieldFromInstruction32(Insn, 23, 1)) imm *= -1;
2213 Inst.addOperand(MCOperand::CreateImm(imm));
2218 unsigned addrmode = fieldFromInstruction32(Insn, 4, 2);
2219 addrmode |= fieldFromInstruction32(Insn, 0, 4) << 2;
2220 addrmode |= fieldFromInstruction32(Insn, 16, 4) << 6;
2221 DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder);
2226 static bool DecodeT2Imm8S4(llvm::MCInst &Inst, unsigned Val,
2227 uint64_t Address, const void *Decoder) {
2228 int imm = Val & 0xFF;
2229 if (!(Val & 0x100)) imm *= -1;
2230 Inst.addOperand(MCOperand::CreateImm(imm << 2));
2235 static bool DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val,
2236 uint64_t Address, const void *Decoder) {
2237 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2238 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2240 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder) ||
2241 !DecodeT2Imm8S4(Inst, imm, Address, Decoder))
2247 static bool DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
2248 uint64_t Address, const void *Decoder) {
2249 int imm = Val & 0xFF;
2250 if (!(Val & 0x100)) imm *= -1;
2251 Inst.addOperand(MCOperand::CreateImm(imm));
2257 static bool DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val,
2258 uint64_t Address, const void *Decoder) {
2259 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2260 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2262 // Some instructions always use an additive offset.
2263 switch (Inst.getOpcode()) {
2275 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder) ||
2276 !DecodeT2Imm8(Inst, imm, Address, Decoder))
2283 static bool DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val,
2284 uint64_t Address, const void *Decoder) {
2285 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
2286 unsigned imm = fieldFromInstruction32(Val, 0, 12);
2288 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
2289 Inst.addOperand(MCOperand::CreateImm(imm));
2295 static bool DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Insn,
2296 uint64_t Address, const void *Decoder) {
2297 unsigned imm = fieldFromInstruction16(Insn, 0, 7);
2299 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2300 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2301 Inst.addOperand(MCOperand::CreateImm(imm));
2306 static bool DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn,
2307 uint64_t Address, const void *Decoder) {
2308 if (Inst.getOpcode() == ARM::tADDrSP) {
2309 unsigned Rdm = fieldFromInstruction16(Insn, 0, 3);
2310 Rdm |= fieldFromInstruction16(Insn, 7, 1) << 3;
2312 if (!DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)) return false;
2313 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2314 if (!DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)) return false;
2315 } else if (Inst.getOpcode() == ARM::tADDspr) {
2316 unsigned Rm = fieldFromInstruction16(Insn, 3, 4);
2318 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2319 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2320 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
2326 static bool DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn,
2327 uint64_t Address, const void *Decoder) {
2328 unsigned imod = fieldFromInstruction16(Insn, 4, 1) | 0x2;
2329 unsigned flags = fieldFromInstruction16(Insn, 0, 3);
2331 Inst.addOperand(MCOperand::CreateImm(imod));
2332 Inst.addOperand(MCOperand::CreateImm(flags));
2337 static bool DecodePostIdxReg(llvm::MCInst &Inst, unsigned Insn,
2338 uint64_t Address, const void *Decoder) {
2339 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2340 unsigned add = fieldFromInstruction32(Insn, 4, 1);
2342 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
2343 Inst.addOperand(MCOperand::CreateImm(add));
2348 static bool DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Val,
2349 uint64_t Address, const void *Decoder) {
2350 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
2354 static bool DecodeCoprocessor(llvm::MCInst &Inst, unsigned Val,
2355 uint64_t Address, const void *Decoder) {
2356 if (Val == 0xA || Val == 0xB)
2359 Inst.addOperand(MCOperand::CreateImm(Val));
2363 static bool DecodeThumbSRImm(llvm::MCInst &Inst, unsigned Val,
2364 uint64_t Address, const void *Decoder) {
2366 Inst.addOperand(MCOperand::CreateImm(32));
2368 Inst.addOperand(MCOperand::CreateImm(Val));
2372 static bool DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Insn,
2373 uint64_t Address, const void *Decoder) {
2374 unsigned pred = fieldFromInstruction32(Insn, 22, 4);
2375 if (pred == 0xE || pred == 0xF) {
2376 unsigned opc = fieldFromInstruction32(Insn, 4, 2);
2381 Inst.setOpcode(ARM::t2DSB);
2384 Inst.setOpcode(ARM::t2DMB);
2387 Inst.setOpcode(ARM::t2ISB);
2391 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
2392 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
2395 unsigned brtarget = fieldFromInstruction32(Insn, 0, 11) << 1;
2396 brtarget |= fieldFromInstruction32(Insn, 11, 1) << 19;
2397 brtarget |= fieldFromInstruction32(Insn, 13, 1) << 18;
2398 brtarget |= fieldFromInstruction32(Insn, 16, 6) << 12;
2399 brtarget |= fieldFromInstruction32(Insn, 26, 1) << 20;
2401 if (!DecodeT2BROperand(Inst, brtarget, Address, Decoder) ||
2402 !DecodePredicateOperand(Inst, pred, Address, Decoder))
2408 // Decode a shifted immediate operand. These basically consist
2409 // of an 8-bit value, and a 4-bit directive that specifies either
2410 // a splat operation or a rotation.
2411 static bool DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val,
2412 uint64_t Address, const void *Decoder) {
2413 unsigned ctrl = fieldFromInstruction32(Val, 10, 2);
2415 unsigned byte = fieldFromInstruction32(Val, 8, 2);
2416 unsigned imm = fieldFromInstruction32(Val, 0, 8);
2419 Inst.addOperand(MCOperand::CreateImm(imm));
2422 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
2425 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
2428 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
2433 unsigned unrot = fieldFromInstruction32(Val, 0, 7) | 0x80;
2434 unsigned rot = fieldFromInstruction32(Val, 7, 5);
2435 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
2436 Inst.addOperand(MCOperand::CreateImm(imm));
2442 static bool DecodeThumbBCCTargetOperand(llvm::MCInst &Inst, unsigned Val,
2443 uint64_t Address, const void *Decoder){
2444 Inst.addOperand(MCOperand::CreateImm(Val << 1));
2448 static bool DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
2449 uint64_t Address, const void *Decoder){
2450 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
2454 static bool DecodeAddrMode3Offset(llvm::MCInst &Inst, unsigned Val,
2455 uint64_t Address, const void *Decoder) {
2456 bool isImm = fieldFromInstruction32(Val, 9, 1);
2457 bool isAdd = fieldFromInstruction32(Val, 8, 1);
2458 unsigned imm = fieldFromInstruction32(Val, 0, 8);
2461 if (!DecodeGPRRegisterClass(Inst, imm, Address, Decoder)) return false;
2462 Inst.addOperand(MCOperand::CreateImm(!isAdd << 8));
2464 Inst.addOperand(MCOperand::CreateReg(0));
2465 Inst.addOperand(MCOperand::CreateImm(imm | (!isAdd << 8)));
2471 static bool DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Val,
2472 uint64_t Address, const void *Decoder) {
2487 Inst.addOperand(MCOperand::CreateImm(Val));
2491 static bool DecodeMSRMask(llvm::MCInst &Inst, unsigned Val,
2492 uint64_t Address, const void *Decoder) {
2493 if (!Val) return false;
2494 Inst.addOperand(MCOperand::CreateImm(Val));
2498 static bool DecodeDoubleRegLoad(llvm::MCInst &Inst, unsigned Insn,
2499 uint64_t Address, const void *Decoder) {
2500 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2501 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2502 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
2504 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return false;
2506 if (!DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)) return false;
2507 if (!DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)) return false;
2508 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
2509 if (!DecodePredicateOperand(Inst, pred, Address, Decoder)) return false;
2515 static bool DecodeDoubleRegStore(llvm::MCInst &Inst, unsigned Insn,
2516 uint64_t Address, const void *Decoder) {
2517 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2518 unsigned Rt = fieldFromInstruction32(Insn, 0, 4);
2519 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2520 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
2522 if (!DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
2524 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return false;
2525 if (Rd == Rn || Rd == Rt || Rd == Rt+1) return false;
2527 if (!DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)) return false;
2528 if (!DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)) return false;
2529 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
2530 if (!DecodePredicateOperand(Inst, pred, Address, Decoder)) return false;
2535 static bool DecodeSTRPreImm(llvm::MCInst &Inst, unsigned Insn,
2536 uint64_t Address, const void *Decoder) {
2537 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2538 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2539 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
2540 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
2541 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
2542 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
2544 if (Rn == 0xF || Rn == Rt) return false; // UNPREDICTABLE
2546 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
2547 if (!DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)) return false;
2548 if (!DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)) return false;
2549 if (!DecodePredicateOperand(Inst, pred, Address, Decoder)) return false;
2554 static bool DecodeSTRPreReg(llvm::MCInst &Inst, unsigned Insn,
2555 uint64_t Address, const void *Decoder) {
2556 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2557 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2558 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
2559 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
2560 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
2561 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
2563 if (Rn == 0xF || Rn == Rt) return false; // UNPREDICTABLE
2565 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
2566 if (!DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)) return false;
2567 if (!DecodeSORegMemOperand(Inst, imm, Address, Decoder)) return false;
2568 if (!DecodePredicateOperand(Inst, pred, Address, Decoder)) return false;