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);
140 static bool DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn,
141 uint64_t Address, const void *Decoder);
142 static bool DecodeThumbBROperand(llvm::MCInst &Inst, unsigned Val,
143 uint64_t Address, const void *Decoder);
144 static bool DecodeT2BROperand(llvm::MCInst &Inst, unsigned Val,
145 uint64_t Address, const void *Decoder);
146 static bool DecodeThumbCmpBROperand(llvm::MCInst &Inst, unsigned Val,
147 uint64_t Address, const void *Decoder);
148 static bool DecodeThumbAddrModeRR(llvm::MCInst &Inst, unsigned Val,
149 uint64_t Address, const void *Decoder);
150 static bool DecodeThumbAddrModeIS(llvm::MCInst &Inst, unsigned Val,
151 uint64_t Address, const void *Decoder);
152 static bool DecodeThumbAddrModePC(llvm::MCInst &Inst, unsigned Val,
153 uint64_t Address, const void *Decoder);
154 static bool DecodeThumbAddrModeSP(llvm::MCInst &Inst, unsigned Val,
155 uint64_t Address, const void *Decoder);
156 static bool DecodeT2AddrModeSOReg(llvm::MCInst &Inst, unsigned Val,
157 uint64_t Address, const void *Decoder);
158 static bool DecodeT2LoadShift(llvm::MCInst &Inst, unsigned Val,
159 uint64_t Address, const void *Decoder);
160 static bool DecodeT2Imm8S4(llvm::MCInst &Inst, unsigned Val,
161 uint64_t Address, const void *Decoder);
162 static bool DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val,
163 uint64_t Address, const void *Decoder);
164 static bool DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
165 uint64_t Address, const void *Decoder);
166 static bool DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val,
167 uint64_t Address, const void *Decoder);
168 static bool DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Val,
169 uint64_t Address, const void *Decoder);
170 static bool DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn,
171 uint64_t Address, const void *Decoder);
172 static bool DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn,
173 uint64_t Address, const void *Decoder);
174 static bool DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Insn,
175 uint64_t Address, const void *Decoder);
176 static bool DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val,
177 uint64_t Address, const void *Decoder);
178 static bool DecodeThumbSRImm(llvm::MCInst &Inst, unsigned Val,
179 uint64_t Address, const void *Decoder);
180 static bool DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Val,
181 uint64_t Address, const void *Decoder);
182 static bool DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val,
183 uint64_t Address, const void *Decoder);
184 static bool DecodeThumbBCCTargetOperand(llvm::MCInst &Inst, unsigned Val,
185 uint64_t Address, const void *Decoder);
186 static bool DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
187 uint64_t Address, const void *Decoder);
189 #include "ARMGenDisassemblerTables.inc"
190 #include "ARMGenInstrInfo.inc"
191 #include "ARMGenEDInfo.inc"
193 using namespace llvm;
195 static MCDisassembler *createARMDisassembler(const Target &T) {
196 return new ARMDisassembler;
199 static MCDisassembler *createThumbDisassembler(const Target &T) {
200 return new ThumbDisassembler;
203 EDInstInfo *ARMDisassembler::getEDInfo() const {
207 EDInstInfo *ThumbDisassembler::getEDInfo() const {
212 bool ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
213 const MemoryObject &Region,
214 uint64_t Address,raw_ostream &os) const {
217 // We want to read exactly 4 bytes of data.
218 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1)
221 // Encoded as a small-endian 32-bit word in the stream.
222 uint32_t insn = (bytes[3] << 24) |
227 // Calling the auto-generated decoder function.
228 bool result = decodeARMInstruction32(MI, insn, Address, this);
234 // Instructions that are shared between ARM and Thumb modes.
235 // FIXME: This shouldn't really exist. It's an artifact of the
236 // fact that we fail to encode a few instructions properly for Thumb.
238 result = decodeCommonInstruction32(MI, insn, Address, this);
244 // VFP and NEON instructions, similarly, are shared between ARM
247 result = decodeVFPInstruction32(MI, insn, Address, this);
254 result = decodeNEONDataInstruction32(MI, insn, Address, this);
257 // Add a fake predicate operand, because we share these instruction
258 // definitions with Thumb2 where these instructions are predicable.
259 if (!DecodePredicateOperand(MI, 0xE, Address, this)) return false;
264 result = decodeNEONLoadStoreInstruction32(MI, insn, Address, this);
267 // Add a fake predicate operand, because we share these instruction
268 // definitions with Thumb2 where these instructions are predicable.
269 if (!DecodePredicateOperand(MI, 0xE, Address, this)) return false;
274 result = decodeNEONDupInstruction32(MI, insn, Address, this);
277 // Add a fake predicate operand, because we share these instruction
278 // definitions with Thumb2 where these instructions are predicable.
279 if (!DecodePredicateOperand(MI, 0xE, Address, this)) return false;
289 extern MCInstrDesc ARMInsts[];
292 // Thumb1 instructions don't have explicit S bits. Rather, they
293 // implicitly set CPSR. Since it's not represented in the encoding, the
294 // auto-generated decoder won't inject the CPSR operand. We need to fix
295 // that as a post-pass.
296 static void AddThumb1SBit(MCInst &MI, bool InITBlock) {
297 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
298 MCInst::iterator I = MI.begin();
299 for (unsigned i = 0, e = MI.size(); i < e; ++i, ++I) {
300 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) {
301 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
306 if (OpInfo[MI.size()].isOptionalDef() &&
307 OpInfo[MI.size()].RegClass == ARM::CCRRegClassID)
308 MI.insert(MI.end(), MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
311 // Most Thumb instructions don't have explicit predicates in the
312 // encoding, but rather get their predicates from IT context. We need
313 // to fix up the predicate operands using this context information as a
315 void ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
316 // A few instructions actually have predicates encoded in them. Don't
317 // try to overwrite it if we're seeing one of those.
318 switch (MI.getOpcode()) {
326 // If we're in an IT block, base the predicate on that. Otherwise,
327 // assume a predicate of AL.
329 if (!ITBlock.empty()) {
335 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
336 MCInst::iterator I = MI.begin();
337 for (unsigned i = 0, e = MI.size(); i < e; ++i, ++I) {
338 if (OpInfo[i].isPredicate()) {
339 I = MI.insert(I, MCOperand::CreateImm(CC));
342 MI.insert(I, MCOperand::CreateReg(0));
344 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
349 MI.insert(MI.end(), MCOperand::CreateImm(CC));
351 MI.insert(MI.end(), MCOperand::CreateReg(0));
353 MI.insert(MI.end(), MCOperand::CreateReg(ARM::CPSR));
356 // Thumb VFP instructions are a special case. Because we share their
357 // encodings between ARM and Thumb modes, and they are predicable in ARM
358 // mode, the auto-generated decoder will give them an (incorrect)
359 // predicate operand. We need to rewrite these operands based on the IT
360 // context as a post-pass.
361 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
363 if (!ITBlock.empty()) {
369 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
370 MCInst::iterator I = MI.begin();
371 for (unsigned i = 0, e = MI.size(); i < e; ++i, ++I) {
372 if (OpInfo[i].isPredicate() ) {
378 I->setReg(ARM::CPSR);
385 bool ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
386 const MemoryObject &Region,
387 uint64_t Address,raw_ostream &os) const {
390 // We want to read exactly 2 bytes of data.
391 if (Region.readBytes(Address, 2, (uint8_t*)bytes, NULL) == -1)
394 uint16_t insn16 = (bytes[1] << 8) | bytes[0];
395 bool result = decodeThumbInstruction16(MI, insn16, Address, this);
398 bool InITBlock = !ITBlock.empty();
399 AddThumbPredicate(MI);
400 AddThumb1SBit(MI, InITBlock);
405 result = decodeThumb2Instruction16(MI, insn16, Address, this);
408 AddThumbPredicate(MI);
410 // If we find an IT instruction, we need to parse its condition
411 // code and mask operands so that we can apply them correctly
412 // to the subsequent instructions.
413 if (MI.getOpcode() == ARM::t2IT) {
414 unsigned firstcond = MI.getOperand(0).getImm();
415 uint32_t mask = MI.getOperand(1).getImm();
416 unsigned zeros = CountTrailingZeros_32(mask);
419 for (unsigned i = 0; i < 4 - (zeros+1); ++i) {
420 if (firstcond ^ (mask & 1))
421 ITBlock.push_back(firstcond ^ 1);
423 ITBlock.push_back(firstcond);
426 ITBlock.push_back(firstcond);
432 // We want to read exactly 4 bytes of data.
433 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1)
436 uint32_t insn32 = (bytes[3] << 8) |
441 result = decodeThumbInstruction32(MI, insn32, Address, this);
444 bool InITBlock = ITBlock.size();
445 AddThumbPredicate(MI);
446 AddThumb1SBit(MI, InITBlock);
451 result = decodeThumb2Instruction32(MI, insn32, Address, this);
454 AddThumbPredicate(MI);
459 result = decodeCommonInstruction32(MI, insn32, Address, this);
462 AddThumbPredicate(MI);
467 result = decodeVFPInstruction32(MI, insn32, Address, this);
470 UpdateThumbVFPPredicate(MI);
475 if (fieldFromInstruction32(insn32, 24, 4) == 0xF) {
476 uint32_t NEONDataInsn = insn32;
477 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
478 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
479 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
480 result = decodeNEONDataInstruction32(MI, NEONDataInsn, Address, this);
483 AddThumbPredicate(MI);
489 result = decodeNEONLoadStoreInstruction32(MI, insn32, Address, this);
492 AddThumbPredicate(MI);
497 result = decodeNEONDupInstruction32(MI, insn32, Address, this);
500 AddThumbPredicate(MI);
508 extern "C" void LLVMInitializeARMDisassembler() {
509 TargetRegistry::RegisterMCDisassembler(TheARMTarget,
510 createARMDisassembler);
511 TargetRegistry::RegisterMCDisassembler(TheThumbTarget,
512 createThumbDisassembler);
515 static const unsigned GPRDecoderTable[] = {
516 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
517 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
518 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
519 ARM::R12, ARM::SP, ARM::LR, ARM::PC
522 static bool DecodeGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
523 uint64_t Address, const void *Decoder) {
527 unsigned Register = GPRDecoderTable[RegNo];
528 Inst.addOperand(MCOperand::CreateReg(Register));
532 static bool DecodeGPRnopcRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
533 uint64_t Address, const void *Decoder) {
534 if (RegNo == 15) return false;
535 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
538 static bool DecodetGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
539 uint64_t Address, const void *Decoder) {
542 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
545 static bool DecodetcGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
546 uint64_t Address, const void *Decoder) {
547 unsigned Register = 0;
571 Inst.addOperand(MCOperand::CreateReg(Register));
575 static bool DecoderGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
576 uint64_t Address, const void *Decoder) {
577 if (RegNo == 13 || RegNo == 15) return false;
578 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
581 static const unsigned SPRDecoderTable[] = {
582 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
583 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
584 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
585 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
586 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
587 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
588 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
589 ARM::S28, ARM::S29, ARM::S30, ARM::S31
592 static bool DecodeSPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
593 uint64_t Address, const void *Decoder) {
597 unsigned Register = SPRDecoderTable[RegNo];
598 Inst.addOperand(MCOperand::CreateReg(Register));
602 static const unsigned DPRDecoderTable[] = {
603 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
604 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
605 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
606 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
607 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
608 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
609 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
610 ARM::D28, ARM::D29, ARM::D30, ARM::D31
613 static bool DecodeDPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
614 uint64_t Address, const void *Decoder) {
618 unsigned Register = DPRDecoderTable[RegNo];
619 Inst.addOperand(MCOperand::CreateReg(Register));
623 static bool DecodeDPR_8RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
624 uint64_t Address, const void *Decoder) {
627 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
630 static bool DecodeDPR_VFP2RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
631 uint64_t Address, const void *Decoder) {
634 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
637 static const unsigned QPRDecoderTable[] = {
638 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
639 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
640 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
641 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
645 static bool DecodeQPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
646 uint64_t Address, const void *Decoder) {
651 unsigned Register = QPRDecoderTable[RegNo];
652 Inst.addOperand(MCOperand::CreateReg(Register));
656 static bool DecodePredicateOperand(llvm::MCInst &Inst, unsigned Val,
657 uint64_t Address, const void *Decoder) {
658 if (Val == 0xF) return false;
659 // AL predicate is not allowed on Thumb1 branches.
660 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
662 Inst.addOperand(MCOperand::CreateImm(Val));
663 if (Val == ARMCC::AL) {
664 Inst.addOperand(MCOperand::CreateReg(0));
666 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
670 static bool DecodeCCOutOperand(llvm::MCInst &Inst, unsigned Val,
671 uint64_t Address, const void *Decoder) {
673 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
675 Inst.addOperand(MCOperand::CreateReg(0));
679 static bool DecodeSOImmOperand(llvm::MCInst &Inst, unsigned Val,
680 uint64_t Address, const void *Decoder) {
681 uint32_t imm = Val & 0xFF;
682 uint32_t rot = (Val & 0xF00) >> 7;
683 uint32_t rot_imm = (imm >> rot) | (imm << (32-rot));
684 Inst.addOperand(MCOperand::CreateImm(rot_imm));
688 static bool DecodeBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
689 uint64_t Address, const void *Decoder) {
691 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(Val)));
695 static bool DecodeSORegImmOperand(llvm::MCInst &Inst, unsigned Val,
696 uint64_t Address, const void *Decoder) {
698 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
699 unsigned type = fieldFromInstruction32(Val, 5, 2);
700 unsigned imm = fieldFromInstruction32(Val, 7, 5);
702 // Register-immediate
703 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
705 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
721 if (Shift == ARM_AM::ror && imm == 0)
724 unsigned Op = Shift | (imm << 3);
725 Inst.addOperand(MCOperand::CreateImm(Op));
730 static bool DecodeSORegRegOperand(llvm::MCInst &Inst, unsigned Val,
731 uint64_t Address, const void *Decoder) {
733 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
734 unsigned type = fieldFromInstruction32(Val, 5, 2);
735 unsigned Rs = fieldFromInstruction32(Val, 8, 4);
738 if (!DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)) return false;
739 if (!DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)) return false;
741 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
757 Inst.addOperand(MCOperand::CreateImm(Shift));
762 static bool DecodeRegListOperand(llvm::MCInst &Inst, unsigned Val,
763 uint64_t Address, const void *Decoder) {
764 // Empty register lists are not allowed.
765 if (CountPopulation_32(Val) == 0) return false;
766 for (unsigned i = 0; i < 16; ++i) {
767 if (Val & (1 << i)) {
768 if (!DecodeGPRRegisterClass(Inst, i, Address, Decoder)) return false;
775 static bool DecodeSPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
776 uint64_t Address, const void *Decoder) {
777 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
778 unsigned regs = Val & 0xFF;
780 if (!DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)) return false;
781 for (unsigned i = 0; i < (regs - 1); ++i) {
782 if (!DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)) return false;
788 static bool DecodeDPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
789 uint64_t Address, const void *Decoder) {
790 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
791 unsigned regs = (Val & 0xFF) / 2;
793 if (!DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)) return false;
794 for (unsigned i = 0; i < (regs - 1); ++i) {
795 if (!DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)) return false;
801 static bool DecodeBitfieldMaskOperand(llvm::MCInst &Inst, unsigned Val,
802 uint64_t Address, const void *Decoder) {
803 // This operand encodes a mask of contiguous zeros between a specified MSB
804 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
805 // the mask of all bits LSB-and-lower, and then xor them to create
806 // the mask of that's all ones on [msb, lsb]. Finally we not it to
807 // create the final mask.
808 unsigned msb = fieldFromInstruction32(Val, 5, 5);
809 unsigned lsb = fieldFromInstruction32(Val, 0, 5);
810 uint32_t msb_mask = (1 << (msb+1)) - 1;
811 uint32_t lsb_mask = (1 << lsb) - 1;
812 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
816 static bool DecodeCopMemInstruction(llvm::MCInst &Inst, unsigned Insn,
817 uint64_t Address, const void *Decoder) {
818 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
819 unsigned CRd = fieldFromInstruction32(Insn, 12, 4);
820 unsigned coproc = fieldFromInstruction32(Insn, 8, 4);
821 unsigned imm = fieldFromInstruction32(Insn, 0, 8);
822 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
823 unsigned U = fieldFromInstruction32(Insn, 23, 1);
825 switch (Inst.getOpcode()) {
826 case ARM::LDC_OFFSET:
829 case ARM::LDC_OPTION:
830 case ARM::LDCL_OFFSET:
833 case ARM::LDCL_OPTION:
834 case ARM::STC_OFFSET:
837 case ARM::STC_OPTION:
838 case ARM::STCL_OFFSET:
841 case ARM::STCL_OPTION:
842 if (coproc == 0xA || coproc == 0xB)
849 Inst.addOperand(MCOperand::CreateImm(coproc));
850 Inst.addOperand(MCOperand::CreateImm(CRd));
851 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
852 switch (Inst.getOpcode()) {
853 case ARM::LDC_OPTION:
854 case ARM::LDCL_OPTION:
855 case ARM::LDC2_OPTION:
856 case ARM::LDC2L_OPTION:
857 case ARM::STC_OPTION:
858 case ARM::STCL_OPTION:
859 case ARM::STC2_OPTION:
860 case ARM::STC2L_OPTION:
865 Inst.addOperand(MCOperand::CreateReg(0));
869 unsigned P = fieldFromInstruction32(Insn, 24, 1);
870 unsigned W = fieldFromInstruction32(Insn, 21, 1);
872 bool writeback = (P == 0) || (W == 1);
873 unsigned idx_mode = 0;
875 idx_mode = ARMII::IndexModePre;
876 else if (!P && writeback)
877 idx_mode = ARMII::IndexModePost;
879 switch (Inst.getOpcode()) {
883 case ARM::LDC_OPTION:
884 case ARM::LDCL_OPTION:
885 case ARM::LDC2_OPTION:
886 case ARM::LDC2L_OPTION:
887 case ARM::STC_OPTION:
888 case ARM::STCL_OPTION:
889 case ARM::STC2_OPTION:
890 case ARM::STC2L_OPTION:
891 Inst.addOperand(MCOperand::CreateImm(imm));
895 Inst.addOperand(MCOperand::CreateImm(
896 ARM_AM::getAM2Opc(ARM_AM::add, imm, ARM_AM::lsl, idx_mode)));
898 Inst.addOperand(MCOperand::CreateImm(
899 ARM_AM::getAM2Opc(ARM_AM::sub, imm, ARM_AM::lsl, idx_mode)));
903 switch (Inst.getOpcode()) {
904 case ARM::LDC_OFFSET:
907 case ARM::LDC_OPTION:
908 case ARM::LDCL_OFFSET:
911 case ARM::LDCL_OPTION:
912 case ARM::STC_OFFSET:
915 case ARM::STC_OPTION:
916 case ARM::STCL_OFFSET:
919 case ARM::STCL_OPTION:
920 if (!DecodePredicateOperand(Inst, pred, Address, Decoder)) return false;
929 static bool DecodeAddrMode2IdxInstruction(llvm::MCInst &Inst, unsigned Insn,
930 uint64_t Address, const void *Decoder) {
931 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
932 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
933 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
934 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
935 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
936 unsigned reg = fieldFromInstruction32(Insn, 25, 1);
937 unsigned P = fieldFromInstruction32(Insn, 24, 1);
938 unsigned W = fieldFromInstruction32(Insn, 21, 1);
940 // On stores, the writeback operand precedes Rt.
941 switch (Inst.getOpcode()) {
942 case ARM::STR_POST_IMM:
943 case ARM::STR_POST_REG:
944 case ARM::STRB_POST_IMM:
945 case ARM::STRB_POST_REG:
948 case ARM::STRBT_POST_REG:
949 case ARM::STRBT_POST_IMM:
950 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
956 if (!DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)) return false;
958 // On loads, the writeback operand comes after Rt.
959 switch (Inst.getOpcode()) {
960 case ARM::LDR_POST_IMM:
961 case ARM::LDR_POST_REG:
962 case ARM::LDRB_POST_IMM:
963 case ARM::LDRB_POST_REG:
965 case ARM::LDRBT_POST_REG:
966 case ARM::LDRBT_POST_IMM:
967 case ARM::LDRT_POST_REG:
968 case ARM::LDRT_POST_IMM:
969 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))
976 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
978 ARM_AM::AddrOpc Op = ARM_AM::add;
979 if (!fieldFromInstruction32(Insn, 23, 1))
982 bool writeback = (P == 0) || (W == 1);
983 unsigned idx_mode = 0;
985 idx_mode = ARMII::IndexModePre;
986 else if (!P && writeback)
987 idx_mode = ARMII::IndexModePost;
989 if (writeback && (Rn == 15 || Rn == Rt)) return false; // UNPREDICTABLE
992 if (!DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)) return false;
993 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
994 switch( fieldFromInstruction32(Insn, 5, 2)) {
1010 unsigned amt = fieldFromInstruction32(Insn, 7, 5);
1011 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1013 Inst.addOperand(MCOperand::CreateImm(imm));
1015 Inst.addOperand(MCOperand::CreateReg(0));
1016 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1017 Inst.addOperand(MCOperand::CreateImm(tmp));
1020 if (!DecodePredicateOperand(Inst, pred, Address, Decoder)) return false;
1025 static bool DecodeSORegMemOperand(llvm::MCInst &Inst, unsigned Val,
1026 uint64_t Address, const void *Decoder) {
1027 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1028 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1029 unsigned type = fieldFromInstruction32(Val, 5, 2);
1030 unsigned imm = fieldFromInstruction32(Val, 7, 5);
1031 unsigned U = fieldFromInstruction32(Val, 12, 1);
1033 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1049 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1050 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
1053 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1055 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1056 Inst.addOperand(MCOperand::CreateImm(shift));
1061 static bool DecodeAddrMode3Instruction(llvm::MCInst &Inst, unsigned Insn,
1062 uint64_t Address, const void *Decoder) {
1063 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1064 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1065 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1066 unsigned type = fieldFromInstruction32(Insn, 22, 1);
1067 unsigned imm = fieldFromInstruction32(Insn, 8, 4);
1068 unsigned U = ((~fieldFromInstruction32(Insn, 23, 1)) & 1) << 8;
1069 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1070 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1071 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1073 bool writeback = (W == 1) | (P == 0);
1074 if (writeback) { // Writeback
1076 U |= ARMII::IndexModePre << 9;
1078 U |= ARMII::IndexModePost << 9;
1080 // On stores, the writeback operand precedes Rt.
1081 switch (Inst.getOpcode()) {
1084 case ARM::STRD_POST:
1085 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))
1093 if (!DecodeGPRRegisterClass(Inst, Rt, Address, Decoder))
1095 switch (Inst.getOpcode()) {
1098 case ARM::STRD_POST:
1101 case ARM::LDRD_POST:
1102 if (!DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder))
1110 // On loads, the writeback operand comes after Rt.
1111 switch (Inst.getOpcode()) {
1114 case ARM::LDRD_POST:
1117 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))
1125 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))
1129 Inst.addOperand(MCOperand::CreateReg(0));
1130 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1132 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))
1134 Inst.addOperand(MCOperand::CreateImm(U));
1137 if (!DecodePredicateOperand(Inst, pred, Address, Decoder)) return false;
1142 static bool DecodeRFEInstruction(llvm::MCInst &Inst, unsigned Insn,
1143 uint64_t Address, const void *Decoder) {
1144 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1145 unsigned mode = fieldFromInstruction32(Insn, 23, 2);
1162 Inst.addOperand(MCOperand::CreateImm(mode));
1163 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1168 static bool DecodeMemMultipleWritebackInstruction(llvm::MCInst &Inst,
1170 uint64_t Address, const void *Decoder) {
1171 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1172 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1173 unsigned reglist = fieldFromInstruction32(Insn, 0, 16);
1176 switch (Inst.getOpcode()) {
1178 Inst.setOpcode(ARM::RFEDA);
1180 case ARM::STMDA_UPD:
1181 Inst.setOpcode(ARM::RFEDA_UPD);
1184 Inst.setOpcode(ARM::RFEDB);
1186 case ARM::STMDB_UPD:
1187 Inst.setOpcode(ARM::RFEDB_UPD);
1190 Inst.setOpcode(ARM::RFEIA);
1192 case ARM::STMIA_UPD:
1193 Inst.setOpcode(ARM::RFEIA_UPD);
1196 Inst.setOpcode(ARM::RFEIB);
1198 case ARM::STMIB_UPD:
1199 Inst.setOpcode(ARM::RFEIB_UPD);
1202 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1205 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder) ||
1206 !DecodeGPRRegisterClass(Inst, Rn, Address, Decoder) || // Tied
1207 !DecodePredicateOperand(Inst, pred, Address, Decoder) ||
1208 !DecodeRegListOperand(Inst, reglist, Address, Decoder))
1214 static bool DecodeCPSInstruction(llvm::MCInst &Inst, unsigned Insn,
1215 uint64_t Address, const void *Decoder) {
1216 unsigned imod = fieldFromInstruction32(Insn, 18, 2);
1217 unsigned M = fieldFromInstruction32(Insn, 17, 1);
1218 unsigned iflags = fieldFromInstruction32(Insn, 6, 3);
1219 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1221 // imod == '01' --> UNPREDICTABLE
1222 if (imod == 1) return false;
1224 if (M && mode && imod && iflags) {
1225 Inst.setOpcode(ARM::CPS3p);
1226 Inst.addOperand(MCOperand::CreateImm(imod));
1227 Inst.addOperand(MCOperand::CreateImm(iflags));
1228 Inst.addOperand(MCOperand::CreateImm(mode));
1230 } else if (!mode && !M) {
1231 Inst.setOpcode(ARM::CPS2p);
1232 Inst.addOperand(MCOperand::CreateImm(imod));
1233 Inst.addOperand(MCOperand::CreateImm(iflags));
1235 } else if (!imod && !iflags && M) {
1236 Inst.setOpcode(ARM::CPS1p);
1237 Inst.addOperand(MCOperand::CreateImm(mode));
1244 static bool DecodeSMLAInstruction(llvm::MCInst &Inst, unsigned Insn,
1245 uint64_t Address, const void *Decoder) {
1246 unsigned Rd = fieldFromInstruction32(Insn, 16, 4);
1247 unsigned Rn = fieldFromInstruction32(Insn, 0, 4);
1248 unsigned Rm = fieldFromInstruction32(Insn, 8, 4);
1249 unsigned Ra = fieldFromInstruction32(Insn, 12, 4);
1250 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1253 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
1255 if (!DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder) ||
1256 !DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder) ||
1257 !DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder) ||
1258 !DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder))
1264 static bool DecodeAddrModeImm12Operand(llvm::MCInst &Inst, unsigned Val,
1265 uint64_t Address, const void *Decoder) {
1266 unsigned add = fieldFromInstruction32(Val, 12, 1);
1267 unsigned imm = fieldFromInstruction32(Val, 0, 12);
1268 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1270 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))
1273 if (!add) imm *= -1;
1274 if (imm == 0 && !add) imm = INT32_MIN;
1275 Inst.addOperand(MCOperand::CreateImm(imm));
1280 static bool DecodeAddrMode5Operand(llvm::MCInst &Inst, unsigned Val,
1281 uint64_t Address, const void *Decoder) {
1282 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
1283 unsigned U = fieldFromInstruction32(Val, 8, 1);
1284 unsigned imm = fieldFromInstruction32(Val, 0, 8);
1286 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))
1290 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
1292 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
1297 static bool DecodeAddrMode7Operand(llvm::MCInst &Inst, unsigned Val,
1298 uint64_t Address, const void *Decoder) {
1299 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
1302 static bool DecodeBranchImmInstruction(llvm::MCInst &Inst, unsigned Insn,
1303 uint64_t Address, const void *Decoder) {
1304 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1305 unsigned imm = fieldFromInstruction32(Insn, 0, 24) << 2;
1308 Inst.setOpcode(ARM::BLXi);
1309 imm |= fieldFromInstruction32(Insn, 24, 1) << 1;
1310 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1314 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1315 if (!DecodePredicateOperand(Inst, pred, Address, Decoder)) return false;
1321 static bool DecodeVCVTImmOperand(llvm::MCInst &Inst, unsigned Val,
1322 uint64_t Address, const void *Decoder) {
1323 Inst.addOperand(MCOperand::CreateImm(64 - Val));
1327 static bool DecodeAddrMode6Operand(llvm::MCInst &Inst, unsigned Val,
1328 uint64_t Address, const void *Decoder) {
1329 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1330 unsigned align = fieldFromInstruction32(Val, 4, 2);
1332 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))
1335 Inst.addOperand(MCOperand::CreateImm(0));
1337 Inst.addOperand(MCOperand::CreateImm(4 << align));
1342 static bool DecodeVLDInstruction(llvm::MCInst &Inst, unsigned Insn,
1343 uint64_t Address, const void *Decoder) {
1344 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1345 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1346 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
1347 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1348 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
1349 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1351 // First output register
1352 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
1354 // Second output register
1355 switch (Inst.getOpcode()) {
1360 case ARM::VLD1q8_UPD:
1361 case ARM::VLD1q16_UPD:
1362 case ARM::VLD1q32_UPD:
1363 case ARM::VLD1q64_UPD:
1368 case ARM::VLD1d8T_UPD:
1369 case ARM::VLD1d16T_UPD:
1370 case ARM::VLD1d32T_UPD:
1371 case ARM::VLD1d64T_UPD:
1376 case ARM::VLD1d8Q_UPD:
1377 case ARM::VLD1d16Q_UPD:
1378 case ARM::VLD1d32Q_UPD:
1379 case ARM::VLD1d64Q_UPD:
1383 case ARM::VLD2d8_UPD:
1384 case ARM::VLD2d16_UPD:
1385 case ARM::VLD2d32_UPD:
1389 case ARM::VLD2q8_UPD:
1390 case ARM::VLD2q16_UPD:
1391 case ARM::VLD2q32_UPD:
1395 case ARM::VLD3d8_UPD:
1396 case ARM::VLD3d16_UPD:
1397 case ARM::VLD3d32_UPD:
1401 case ARM::VLD4d8_UPD:
1402 case ARM::VLD4d16_UPD:
1403 case ARM::VLD4d32_UPD:
1404 if (!DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)) return false;
1409 case ARM::VLD2b8_UPD:
1410 case ARM::VLD2b16_UPD:
1411 case ARM::VLD2b32_UPD:
1415 case ARM::VLD3q8_UPD:
1416 case ARM::VLD3q16_UPD:
1417 case ARM::VLD3q32_UPD:
1421 case ARM::VLD4q8_UPD:
1422 case ARM::VLD4q16_UPD:
1423 case ARM::VLD4q32_UPD:
1424 if (!DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)) return false;
1429 // Third output register
1430 switch(Inst.getOpcode()) {
1435 case ARM::VLD1d8T_UPD:
1436 case ARM::VLD1d16T_UPD:
1437 case ARM::VLD1d32T_UPD:
1438 case ARM::VLD1d64T_UPD:
1443 case ARM::VLD1d8Q_UPD:
1444 case ARM::VLD1d16Q_UPD:
1445 case ARM::VLD1d32Q_UPD:
1446 case ARM::VLD1d64Q_UPD:
1450 case ARM::VLD2q8_UPD:
1451 case ARM::VLD2q16_UPD:
1452 case ARM::VLD2q32_UPD:
1456 case ARM::VLD3d8_UPD:
1457 case ARM::VLD3d16_UPD:
1458 case ARM::VLD3d32_UPD:
1462 case ARM::VLD4d8_UPD:
1463 case ARM::VLD4d16_UPD:
1464 case ARM::VLD4d32_UPD:
1465 if (!DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)) return false;
1470 case ARM::VLD3q8_UPD:
1471 case ARM::VLD3q16_UPD:
1472 case ARM::VLD3q32_UPD:
1476 case ARM::VLD4q8_UPD:
1477 case ARM::VLD4q16_UPD:
1478 case ARM::VLD4q32_UPD:
1479 if (!DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)) return false;
1485 // Fourth output register
1486 switch (Inst.getOpcode()) {
1491 case ARM::VLD1d8Q_UPD:
1492 case ARM::VLD1d16Q_UPD:
1493 case ARM::VLD1d32Q_UPD:
1494 case ARM::VLD1d64Q_UPD:
1498 case ARM::VLD2q8_UPD:
1499 case ARM::VLD2q16_UPD:
1500 case ARM::VLD2q32_UPD:
1504 case ARM::VLD4d8_UPD:
1505 case ARM::VLD4d16_UPD:
1506 case ARM::VLD4d32_UPD:
1507 if (!DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)) return false;
1512 case ARM::VLD4q8_UPD:
1513 case ARM::VLD4q16_UPD:
1514 case ARM::VLD4q32_UPD:
1515 if (!DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)) return false;
1521 // Writeback operand
1522 switch (Inst.getOpcode()) {
1523 case ARM::VLD1d8_UPD:
1524 case ARM::VLD1d16_UPD:
1525 case ARM::VLD1d32_UPD:
1526 case ARM::VLD1d64_UPD:
1527 case ARM::VLD1q8_UPD:
1528 case ARM::VLD1q16_UPD:
1529 case ARM::VLD1q32_UPD:
1530 case ARM::VLD1q64_UPD:
1531 case ARM::VLD1d8T_UPD:
1532 case ARM::VLD1d16T_UPD:
1533 case ARM::VLD1d32T_UPD:
1534 case ARM::VLD1d64T_UPD:
1535 case ARM::VLD1d8Q_UPD:
1536 case ARM::VLD1d16Q_UPD:
1537 case ARM::VLD1d32Q_UPD:
1538 case ARM::VLD1d64Q_UPD:
1539 case ARM::VLD2d8_UPD:
1540 case ARM::VLD2d16_UPD:
1541 case ARM::VLD2d32_UPD:
1542 case ARM::VLD2q8_UPD:
1543 case ARM::VLD2q16_UPD:
1544 case ARM::VLD2q32_UPD:
1545 case ARM::VLD2b8_UPD:
1546 case ARM::VLD2b16_UPD:
1547 case ARM::VLD2b32_UPD:
1548 case ARM::VLD3d8_UPD:
1549 case ARM::VLD3d16_UPD:
1550 case ARM::VLD3d32_UPD:
1551 case ARM::VLD3q8_UPD:
1552 case ARM::VLD3q16_UPD:
1553 case ARM::VLD3q32_UPD:
1554 case ARM::VLD4d8_UPD:
1555 case ARM::VLD4d16_UPD:
1556 case ARM::VLD4d32_UPD:
1557 case ARM::VLD4q8_UPD:
1558 case ARM::VLD4q16_UPD:
1559 case ARM::VLD4q32_UPD:
1560 if (!DecodeGPRRegisterClass(Inst, wb, Address, Decoder)) return false;
1566 // AddrMode6 Base (register+alignment)
1567 if (!DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)) return false;
1569 // AddrMode6 Offset (register)
1571 Inst.addOperand(MCOperand::CreateReg(0));
1572 else if (Rm != 0xF) {
1573 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))
1580 static bool DecodeVSTInstruction(llvm::MCInst &Inst, unsigned Insn,
1581 uint64_t Address, const void *Decoder) {
1582 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1583 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1584 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
1585 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1586 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
1587 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1589 // Writeback Operand
1590 switch (Inst.getOpcode()) {
1591 case ARM::VST1d8_UPD:
1592 case ARM::VST1d16_UPD:
1593 case ARM::VST1d32_UPD:
1594 case ARM::VST1d64_UPD:
1595 case ARM::VST1q8_UPD:
1596 case ARM::VST1q16_UPD:
1597 case ARM::VST1q32_UPD:
1598 case ARM::VST1q64_UPD:
1599 case ARM::VST1d8T_UPD:
1600 case ARM::VST1d16T_UPD:
1601 case ARM::VST1d32T_UPD:
1602 case ARM::VST1d64T_UPD:
1603 case ARM::VST1d8Q_UPD:
1604 case ARM::VST1d16Q_UPD:
1605 case ARM::VST1d32Q_UPD:
1606 case ARM::VST1d64Q_UPD:
1607 case ARM::VST2d8_UPD:
1608 case ARM::VST2d16_UPD:
1609 case ARM::VST2d32_UPD:
1610 case ARM::VST2q8_UPD:
1611 case ARM::VST2q16_UPD:
1612 case ARM::VST2q32_UPD:
1613 case ARM::VST2b8_UPD:
1614 case ARM::VST2b16_UPD:
1615 case ARM::VST2b32_UPD:
1616 case ARM::VST3d8_UPD:
1617 case ARM::VST3d16_UPD:
1618 case ARM::VST3d32_UPD:
1619 case ARM::VST3q8_UPD:
1620 case ARM::VST3q16_UPD:
1621 case ARM::VST3q32_UPD:
1622 case ARM::VST4d8_UPD:
1623 case ARM::VST4d16_UPD:
1624 case ARM::VST4d32_UPD:
1625 case ARM::VST4q8_UPD:
1626 case ARM::VST4q16_UPD:
1627 case ARM::VST4q32_UPD:
1628 if (!DecodeGPRRegisterClass(Inst, wb, Address, Decoder))
1635 // AddrMode6 Base (register+alignment)
1636 if (!DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)) return false;
1638 // AddrMode6 Offset (register)
1640 Inst.addOperand(MCOperand::CreateReg(0));
1641 else if (Rm != 0xF) {
1642 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
1645 // First input register
1646 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
1648 // Second input register
1649 switch (Inst.getOpcode()) {
1654 case ARM::VST1q8_UPD:
1655 case ARM::VST1q16_UPD:
1656 case ARM::VST1q32_UPD:
1657 case ARM::VST1q64_UPD:
1662 case ARM::VST1d8T_UPD:
1663 case ARM::VST1d16T_UPD:
1664 case ARM::VST1d32T_UPD:
1665 case ARM::VST1d64T_UPD:
1670 case ARM::VST1d8Q_UPD:
1671 case ARM::VST1d16Q_UPD:
1672 case ARM::VST1d32Q_UPD:
1673 case ARM::VST1d64Q_UPD:
1677 case ARM::VST2d8_UPD:
1678 case ARM::VST2d16_UPD:
1679 case ARM::VST2d32_UPD:
1683 case ARM::VST2q8_UPD:
1684 case ARM::VST2q16_UPD:
1685 case ARM::VST2q32_UPD:
1689 case ARM::VST3d8_UPD:
1690 case ARM::VST3d16_UPD:
1691 case ARM::VST3d32_UPD:
1695 case ARM::VST4d8_UPD:
1696 case ARM::VST4d16_UPD:
1697 case ARM::VST4d32_UPD:
1698 if (!DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)) return false;
1703 case ARM::VST2b8_UPD:
1704 case ARM::VST2b16_UPD:
1705 case ARM::VST2b32_UPD:
1709 case ARM::VST3q8_UPD:
1710 case ARM::VST3q16_UPD:
1711 case ARM::VST3q32_UPD:
1715 case ARM::VST4q8_UPD:
1716 case ARM::VST4q16_UPD:
1717 case ARM::VST4q32_UPD:
1718 if (!DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)) return false;
1724 // Third input register
1725 switch (Inst.getOpcode()) {
1730 case ARM::VST1d8T_UPD:
1731 case ARM::VST1d16T_UPD:
1732 case ARM::VST1d32T_UPD:
1733 case ARM::VST1d64T_UPD:
1738 case ARM::VST1d8Q_UPD:
1739 case ARM::VST1d16Q_UPD:
1740 case ARM::VST1d32Q_UPD:
1741 case ARM::VST1d64Q_UPD:
1745 case ARM::VST2q8_UPD:
1746 case ARM::VST2q16_UPD:
1747 case ARM::VST2q32_UPD:
1751 case ARM::VST3d8_UPD:
1752 case ARM::VST3d16_UPD:
1753 case ARM::VST3d32_UPD:
1757 case ARM::VST4d8_UPD:
1758 case ARM::VST4d16_UPD:
1759 case ARM::VST4d32_UPD:
1760 if (!DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)) return false;
1765 case ARM::VST3q8_UPD:
1766 case ARM::VST3q16_UPD:
1767 case ARM::VST3q32_UPD:
1771 case ARM::VST4q8_UPD:
1772 case ARM::VST4q16_UPD:
1773 case ARM::VST4q32_UPD:
1774 if (!DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)) return false;
1780 // Fourth input register
1781 switch (Inst.getOpcode()) {
1786 case ARM::VST1d8Q_UPD:
1787 case ARM::VST1d16Q_UPD:
1788 case ARM::VST1d32Q_UPD:
1789 case ARM::VST1d64Q_UPD:
1793 case ARM::VST2q8_UPD:
1794 case ARM::VST2q16_UPD:
1795 case ARM::VST2q32_UPD:
1799 case ARM::VST4d8_UPD:
1800 case ARM::VST4d16_UPD:
1801 case ARM::VST4d32_UPD:
1802 if (!DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)) return false;
1807 case ARM::VST4q8_UPD:
1808 case ARM::VST4q16_UPD:
1809 case ARM::VST4q32_UPD:
1810 if (!DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)) return false;
1819 static bool DecodeVLD1DupInstruction(llvm::MCInst &Inst, unsigned Insn,
1820 uint64_t Address, const void *Decoder) {
1821 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1822 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1823 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1824 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1825 unsigned align = fieldFromInstruction32(Insn, 4, 1);
1826 unsigned size = fieldFromInstruction32(Insn, 6, 2);
1827 unsigned regs = fieldFromInstruction32(Insn, 5, 1) + 1;
1829 align *= (1 << size);
1831 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
1833 if (!DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)) return false;
1836 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1839 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1840 Inst.addOperand(MCOperand::CreateImm(align));
1843 Inst.addOperand(MCOperand::CreateReg(0));
1844 else if (Rm != 0xF) {
1845 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
1851 static bool DecodeVLD2DupInstruction(llvm::MCInst &Inst, unsigned Insn,
1852 uint64_t Address, const void *Decoder) {
1853 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1854 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1855 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1856 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1857 unsigned align = fieldFromInstruction32(Insn, 4, 1);
1858 unsigned size = 1 << fieldFromInstruction32(Insn, 6, 2);
1859 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
1862 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
1863 if (!DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)) return false;
1865 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1868 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1869 Inst.addOperand(MCOperand::CreateImm(align));
1872 Inst.addOperand(MCOperand::CreateReg(0));
1873 else if (Rm != 0xF) {
1874 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
1880 static bool DecodeVLD3DupInstruction(llvm::MCInst &Inst, unsigned Insn,
1881 uint64_t Address, const void *Decoder) {
1882 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1883 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1884 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1885 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1886 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
1888 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder) ||
1889 !DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder) ||
1890 !DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder))
1893 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1896 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1897 Inst.addOperand(MCOperand::CreateImm(0));
1900 Inst.addOperand(MCOperand::CreateReg(0));
1901 else if (Rm != 0xF) {
1902 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
1908 static bool DecodeVLD4DupInstruction(llvm::MCInst &Inst, unsigned Insn,
1909 uint64_t Address, const void *Decoder) {
1910 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1911 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1912 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1913 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1914 unsigned size = fieldFromInstruction32(Insn, 6, 2);
1915 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
1916 unsigned align = fieldFromInstruction32(Insn, 4, 1);
1931 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder) ||
1932 !DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder) ||
1933 !DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder) ||
1934 !DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder))
1937 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1940 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1941 Inst.addOperand(MCOperand::CreateImm(align));
1944 Inst.addOperand(MCOperand::CreateReg(0));
1945 else if (Rm != 0xF) {
1946 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
1952 static bool DecodeNEONModImmInstruction(llvm::MCInst &Inst, unsigned Insn,
1953 uint64_t Address, const void *Decoder) {
1954 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1955 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1956 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
1957 imm |= fieldFromInstruction32(Insn, 16, 3) << 4;
1958 imm |= fieldFromInstruction32(Insn, 24, 1) << 7;
1959 imm |= fieldFromInstruction32(Insn, 8, 4) << 8;
1960 imm |= fieldFromInstruction32(Insn, 5, 1) << 12;
1961 unsigned Q = fieldFromInstruction32(Insn, 6, 1);
1964 if (!DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
1966 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
1969 Inst.addOperand(MCOperand::CreateImm(imm));
1971 switch (Inst.getOpcode()) {
1972 case ARM::VORRiv4i16:
1973 case ARM::VORRiv2i32:
1974 case ARM::VBICiv4i16:
1975 case ARM::VBICiv2i32:
1976 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
1978 case ARM::VORRiv8i16:
1979 case ARM::VORRiv4i32:
1980 case ARM::VBICiv8i16:
1981 case ARM::VBICiv4i32:
1982 if (!DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
1991 static bool DecodeVSHLMaxInstruction(llvm::MCInst &Inst, unsigned Insn,
1992 uint64_t Address, const void *Decoder) {
1993 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1994 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1995 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1996 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
1997 unsigned size = fieldFromInstruction32(Insn, 18, 2);
1999 if (!DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
2000 if (!DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
2001 Inst.addOperand(MCOperand::CreateImm(8 << size));
2006 static bool DecodeShiftRight8Imm(llvm::MCInst &Inst, unsigned Val,
2007 uint64_t Address, const void *Decoder) {
2008 Inst.addOperand(MCOperand::CreateImm(8 - Val));
2012 static bool DecodeShiftRight16Imm(llvm::MCInst &Inst, unsigned Val,
2013 uint64_t Address, const void *Decoder) {
2014 Inst.addOperand(MCOperand::CreateImm(16 - Val));
2018 static bool DecodeShiftRight32Imm(llvm::MCInst &Inst, unsigned Val,
2019 uint64_t Address, const void *Decoder) {
2020 Inst.addOperand(MCOperand::CreateImm(32 - Val));
2024 static bool DecodeShiftRight64Imm(llvm::MCInst &Inst, unsigned Val,
2025 uint64_t Address, const void *Decoder) {
2026 Inst.addOperand(MCOperand::CreateImm(64 - Val));
2030 static bool DecodeTBLInstruction(llvm::MCInst &Inst, unsigned Insn,
2031 uint64_t Address, const void *Decoder) {
2032 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2033 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2034 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2035 Rn |= fieldFromInstruction32(Insn, 7, 1) << 4;
2036 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2037 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2038 unsigned op = fieldFromInstruction32(Insn, 6, 1);
2039 unsigned length = fieldFromInstruction32(Insn, 8, 2) + 1;
2041 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
2043 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)) return false; // Writeback
2046 for (unsigned i = 0; i < length; ++i) {
2047 if (!DecodeDPRRegisterClass(Inst, (Rn+i)%32, Address, Decoder)) return false;
2050 if (!DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
2055 static bool DecodeVFPfpImm(llvm::MCInst &Inst, unsigned Val,
2056 uint64_t Address, const void *Decoder) {
2057 // The immediate needs to be a fully instantiated float. However, the
2058 // auto-generated decoder is only able to fill in some of the bits
2059 // necessary. For instance, the 'b' bit is replicated multiple times,
2060 // and is even present in inverted form in one bit. We do a little
2061 // binary parsing here to fill in those missing bits, and then
2062 // reinterpret it all as a float.
2068 fp_conv.integer = Val;
2069 uint32_t b = fieldFromInstruction32(Val, 25, 1);
2070 fp_conv.integer |= b << 26;
2071 fp_conv.integer |= b << 27;
2072 fp_conv.integer |= b << 28;
2073 fp_conv.integer |= b << 29;
2074 fp_conv.integer |= (~b & 0x1) << 30;
2076 Inst.addOperand(MCOperand::CreateFPImm(fp_conv.fp));
2080 static bool DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn,
2081 uint64_t Address, const void *Decoder) {
2082 unsigned dst = fieldFromInstruction16(Insn, 8, 3);
2083 unsigned imm = fieldFromInstruction16(Insn, 0, 8);
2085 if (!DecodetGPRRegisterClass(Inst, dst, Address, Decoder)) return false;
2087 if (Inst.getOpcode() == ARM::tADR)
2088 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
2089 else if (Inst.getOpcode() == ARM::tADDrSPi)
2090 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2094 Inst.addOperand(MCOperand::CreateImm(imm));
2098 static bool DecodeThumbBROperand(llvm::MCInst &Inst, unsigned Val,
2099 uint64_t Address, const void *Decoder) {
2100 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
2104 static bool DecodeT2BROperand(llvm::MCInst &Inst, unsigned Val,
2105 uint64_t Address, const void *Decoder) {
2106 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
2110 static bool DecodeThumbCmpBROperand(llvm::MCInst &Inst, unsigned Val,
2111 uint64_t Address, const void *Decoder) {
2112 Inst.addOperand(MCOperand::CreateImm(SignExtend32<7>(Val << 1)));
2116 static bool DecodeThumbAddrModeRR(llvm::MCInst &Inst, unsigned Val,
2117 uint64_t Address, const void *Decoder) {
2118 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2119 unsigned Rm = fieldFromInstruction32(Val, 3, 3);
2121 if (!DecodetGPRRegisterClass(Inst, Rn, Address, Decoder) ||
2122 !DecodetGPRRegisterClass(Inst, Rm, Address, Decoder))
2128 static bool DecodeThumbAddrModeIS(llvm::MCInst &Inst, unsigned Val,
2129 uint64_t Address, const void *Decoder) {
2130 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2131 unsigned imm = fieldFromInstruction32(Val, 3, 5);
2133 if (!DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
2134 Inst.addOperand(MCOperand::CreateImm(imm));
2139 static bool DecodeThumbAddrModePC(llvm::MCInst &Inst, unsigned Val,
2140 uint64_t Address, const void *Decoder) {
2141 Inst.addOperand(MCOperand::CreateImm(Val << 2));
2146 static bool DecodeThumbAddrModeSP(llvm::MCInst &Inst, unsigned Val,
2147 uint64_t Address, const void *Decoder) {
2148 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2149 Inst.addOperand(MCOperand::CreateImm(Val << 2));
2154 static bool DecodeT2AddrModeSOReg(llvm::MCInst &Inst, unsigned Val,
2155 uint64_t Address, const void *Decoder) {
2156 unsigned Rn = fieldFromInstruction32(Val, 6, 4);
2157 unsigned Rm = fieldFromInstruction32(Val, 2, 4);
2158 unsigned imm = fieldFromInstruction32(Val, 0, 2);
2160 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder) ||
2161 !DecoderGPRRegisterClass(Inst, Rm, Address, Decoder))
2163 Inst.addOperand(MCOperand::CreateImm(imm));
2168 static bool DecodeT2LoadShift(llvm::MCInst &Inst, unsigned Insn,
2169 uint64_t Address, const void *Decoder) {
2170 if (Inst.getOpcode() != ARM::t2PLDs) {
2171 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2172 if (!DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)) return false;
2175 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2177 switch (Inst.getOpcode()) {
2179 Inst.setOpcode(ARM::t2LDRBpci);
2182 Inst.setOpcode(ARM::t2LDRHpci);
2185 Inst.setOpcode(ARM::t2LDRSHpci);
2188 Inst.setOpcode(ARM::t2LDRSBpci);
2191 Inst.setOpcode(ARM::t2PLDi12);
2192 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
2198 int imm = fieldFromInstruction32(Insn, 0, 12);
2199 if (!fieldFromInstruction32(Insn, 23, 1)) imm *= -1;
2200 Inst.addOperand(MCOperand::CreateImm(imm));
2205 unsigned addrmode = fieldFromInstruction32(Insn, 4, 2);
2206 addrmode |= fieldFromInstruction32(Insn, 0, 4) << 2;
2207 addrmode |= fieldFromInstruction32(Insn, 16, 4) << 6;
2208 DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder);
2213 static bool DecodeT2Imm8S4(llvm::MCInst &Inst, unsigned Val,
2214 uint64_t Address, const void *Decoder) {
2215 int imm = Val & 0xFF;
2216 if (!(Val & 0x100)) imm *= -1;
2217 Inst.addOperand(MCOperand::CreateImm(imm << 2));
2222 static bool DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val,
2223 uint64_t Address, const void *Decoder) {
2224 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2225 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2227 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder) ||
2228 !DecodeT2Imm8S4(Inst, imm, Address, Decoder))
2234 static bool DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
2235 uint64_t Address, const void *Decoder) {
2236 int imm = Val & 0xFF;
2237 if (!(Val & 0x100)) imm *= -1;
2238 Inst.addOperand(MCOperand::CreateImm(imm));
2244 static bool DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val,
2245 uint64_t Address, const void *Decoder) {
2246 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2247 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2249 // Some instructions always use an additive offset.
2250 switch (Inst.getOpcode()) {
2262 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder) ||
2263 !DecodeT2Imm8(Inst, imm, Address, Decoder))
2270 static bool DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val,
2271 uint64_t Address, const void *Decoder) {
2272 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
2273 unsigned imm = fieldFromInstruction32(Val, 0, 12);
2275 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
2276 Inst.addOperand(MCOperand::CreateImm(imm));
2282 static bool DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Insn,
2283 uint64_t Address, const void *Decoder) {
2284 unsigned imm = fieldFromInstruction16(Insn, 0, 7);
2286 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2287 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2288 Inst.addOperand(MCOperand::CreateImm(imm));
2293 static bool DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn,
2294 uint64_t Address, const void *Decoder) {
2295 if (Inst.getOpcode() == ARM::tADDrSP) {
2296 unsigned Rdm = fieldFromInstruction16(Insn, 0, 3);
2297 Rdm |= fieldFromInstruction16(Insn, 7, 1) << 3;
2299 if (!DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)) return false;
2300 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2301 if (!DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)) return false;
2302 } else if (Inst.getOpcode() == ARM::tADDspr) {
2303 unsigned Rm = fieldFromInstruction16(Insn, 3, 4);
2305 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2306 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2307 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
2313 static bool DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn,
2314 uint64_t Address, const void *Decoder) {
2315 unsigned imod = fieldFromInstruction16(Insn, 4, 1) | 0x2;
2316 unsigned flags = fieldFromInstruction16(Insn, 0, 3);
2318 Inst.addOperand(MCOperand::CreateImm(imod));
2319 Inst.addOperand(MCOperand::CreateImm(flags));
2324 static bool DecodePostIdxReg(llvm::MCInst &Inst, unsigned Insn,
2325 uint64_t Address, const void *Decoder) {
2326 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2327 unsigned add = fieldFromInstruction32(Insn, 4, 1);
2329 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
2330 Inst.addOperand(MCOperand::CreateImm(add));
2335 static bool DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Val,
2336 uint64_t Address, const void *Decoder) {
2337 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
2341 static bool DecodeCoprocessor(llvm::MCInst &Inst, unsigned Val,
2342 uint64_t Address, const void *Decoder) {
2343 if (Val == 0xA || Val == 0xB)
2346 Inst.addOperand(MCOperand::CreateImm(Val));
2350 static bool DecodeThumbSRImm(llvm::MCInst &Inst, unsigned Val,
2351 uint64_t Address, const void *Decoder) {
2353 Inst.addOperand(MCOperand::CreateImm(32));
2355 Inst.addOperand(MCOperand::CreateImm(Val));
2359 static bool DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Insn,
2360 uint64_t Address, const void *Decoder) {
2361 unsigned pred = fieldFromInstruction32(Insn, 22, 4);
2362 if (pred == 0xE || pred == 0xF) {
2363 unsigned opc = fieldFromInstruction32(Insn, 4, 2);
2368 Inst.setOpcode(ARM::t2DSB);
2371 Inst.setOpcode(ARM::t2DMB);
2374 Inst.setOpcode(ARM::t2ISB);
2378 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
2379 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
2382 unsigned brtarget = fieldFromInstruction32(Insn, 0, 11) << 1;
2383 brtarget |= fieldFromInstruction32(Insn, 11, 1) << 19;
2384 brtarget |= fieldFromInstruction32(Insn, 13, 1) << 18;
2385 brtarget |= fieldFromInstruction32(Insn, 16, 6) << 12;
2386 brtarget |= fieldFromInstruction32(Insn, 26, 1) << 20;
2388 if (!DecodeT2BROperand(Inst, brtarget, Address, Decoder) ||
2389 !DecodePredicateOperand(Inst, pred, Address, Decoder))
2395 // Decode a shifted immediate operand. These basically consist
2396 // of an 8-bit value, and a 4-bit directive that specifies either
2397 // a splat operation or a rotation.
2398 static bool DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val,
2399 uint64_t Address, const void *Decoder) {
2400 unsigned ctrl = fieldFromInstruction32(Val, 10, 2);
2402 unsigned byte = fieldFromInstruction32(Val, 8, 2);
2403 unsigned imm = fieldFromInstruction32(Val, 0, 8);
2406 Inst.addOperand(MCOperand::CreateImm(imm));
2409 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
2412 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
2415 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
2420 unsigned unrot = fieldFromInstruction32(Val, 0, 7) | 0x80;
2421 unsigned rot = fieldFromInstruction32(Val, 7, 5);
2422 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
2423 Inst.addOperand(MCOperand::CreateImm(imm));
2429 static bool DecodeThumbBCCTargetOperand(llvm::MCInst &Inst, unsigned Val,
2430 uint64_t Address, const void *Decoder){
2431 Inst.addOperand(MCOperand::CreateImm(Val << 1));
2435 static bool DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
2436 uint64_t Address, const void *Decoder){
2437 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
2441 static bool DecodeAddrMode3Offset(llvm::MCInst &Inst, unsigned Val,
2442 uint64_t Address, const void *Decoder) {
2443 bool isImm = fieldFromInstruction32(Val, 9, 1);
2444 bool isAdd = fieldFromInstruction32(Val, 8, 1);
2445 unsigned imm = fieldFromInstruction32(Val, 0, 8);
2448 if (!DecodeGPRRegisterClass(Inst, imm, Address, Decoder)) return false;
2449 Inst.addOperand(MCOperand::CreateImm(!isAdd << 8));
2451 Inst.addOperand(MCOperand::CreateReg(0));
2452 Inst.addOperand(MCOperand::CreateImm(imm | (!isAdd << 8)));
2458 static bool DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Val,
2459 uint64_t Address, const void *Decoder) {
2474 Inst.addOperand(MCOperand::CreateImm(Val));
2478 static bool DecodeMSRMask(llvm::MCInst &Inst, unsigned Val,
2479 uint64_t Address, const void *Decoder) {
2480 if (!Val) return false;
2481 Inst.addOperand(MCOperand::CreateImm(Val));