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 DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Insn,
133 uint64_t Address, const void *Decoder);
134 static bool DecodeMSRMask(llvm::MCInst &Inst, unsigned Insn,
135 uint64_t Address, const void *Decoder);
136 static bool DecodeDoubleRegLoad(llvm::MCInst &Inst, unsigned Insn,
137 uint64_t Address, const void *Decoder);
138 static bool DecodeDoubleRegStore(llvm::MCInst &Inst, unsigned Insn,
139 uint64_t Address, const void *Decoder);
140 static bool DecodeSTRPreImm(llvm::MCInst &Inst, unsigned Insn,
141 uint64_t Address, const void *Decoder);
142 static bool DecodeSTRPreReg(llvm::MCInst &Inst, unsigned Insn,
143 uint64_t Address, const void *Decoder);
146 static bool DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn,
147 uint64_t Address, const void *Decoder);
148 static bool DecodeThumbBROperand(llvm::MCInst &Inst, unsigned Val,
149 uint64_t Address, const void *Decoder);
150 static bool DecodeT2BROperand(llvm::MCInst &Inst, unsigned Val,
151 uint64_t Address, const void *Decoder);
152 static bool DecodeThumbCmpBROperand(llvm::MCInst &Inst, unsigned Val,
153 uint64_t Address, const void *Decoder);
154 static bool DecodeThumbAddrModeRR(llvm::MCInst &Inst, unsigned Val,
155 uint64_t Address, const void *Decoder);
156 static bool DecodeThumbAddrModeIS(llvm::MCInst &Inst, unsigned Val,
157 uint64_t Address, const void *Decoder);
158 static bool DecodeThumbAddrModePC(llvm::MCInst &Inst, unsigned Val,
159 uint64_t Address, const void *Decoder);
160 static bool DecodeThumbAddrModeSP(llvm::MCInst &Inst, unsigned Val,
161 uint64_t Address, const void *Decoder);
162 static bool DecodeT2AddrModeSOReg(llvm::MCInst &Inst, unsigned Val,
163 uint64_t Address, const void *Decoder);
164 static bool DecodeT2LoadShift(llvm::MCInst &Inst, unsigned Val,
165 uint64_t Address, const void *Decoder);
166 static bool DecodeT2Imm8S4(llvm::MCInst &Inst, unsigned Val,
167 uint64_t Address, const void *Decoder);
168 static bool DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val,
169 uint64_t Address, const void *Decoder);
170 static bool DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
171 uint64_t Address, const void *Decoder);
172 static bool DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val,
173 uint64_t Address, const void *Decoder);
174 static bool DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Val,
175 uint64_t Address, const void *Decoder);
176 static bool DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn,
177 uint64_t Address, const void *Decoder);
178 static bool DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn,
179 uint64_t Address, const void *Decoder);
180 static bool DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Insn,
181 uint64_t Address, const void *Decoder);
182 static bool DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val,
183 uint64_t Address, const void *Decoder);
184 static bool DecodeThumbSRImm(llvm::MCInst &Inst, unsigned Val,
185 uint64_t Address, const void *Decoder);
186 static bool DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Val,
187 uint64_t Address, const void *Decoder);
188 static bool DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val,
189 uint64_t Address, const void *Decoder);
190 static bool DecodeThumbBCCTargetOperand(llvm::MCInst &Inst, unsigned Val,
191 uint64_t Address, const void *Decoder);
192 static bool DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
193 uint64_t Address, const void *Decoder);
195 #include "ARMGenDisassemblerTables.inc"
196 #include "ARMGenInstrInfo.inc"
197 #include "ARMGenEDInfo.inc"
199 using namespace llvm;
201 static MCDisassembler *createARMDisassembler(const Target &T) {
202 return new ARMDisassembler;
205 static MCDisassembler *createThumbDisassembler(const Target &T) {
206 return new ThumbDisassembler;
209 EDInstInfo *ARMDisassembler::getEDInfo() const {
213 EDInstInfo *ThumbDisassembler::getEDInfo() const {
218 bool ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
219 const MemoryObject &Region,
220 uint64_t Address,raw_ostream &os) const {
223 // We want to read exactly 4 bytes of data.
224 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1)
227 // Encoded as a small-endian 32-bit word in the stream.
228 uint32_t insn = (bytes[3] << 24) |
233 // Calling the auto-generated decoder function.
234 bool result = decodeARMInstruction32(MI, insn, Address, this);
240 // Instructions that are shared between ARM and Thumb modes.
241 // FIXME: This shouldn't really exist. It's an artifact of the
242 // fact that we fail to encode a few instructions properly for Thumb.
244 result = decodeCommonInstruction32(MI, insn, Address, this);
250 // VFP and NEON instructions, similarly, are shared between ARM
253 result = decodeVFPInstruction32(MI, insn, Address, this);
260 result = decodeNEONDataInstruction32(MI, insn, Address, this);
263 // Add a fake predicate operand, because we share these instruction
264 // definitions with Thumb2 where these instructions are predicable.
265 if (!DecodePredicateOperand(MI, 0xE, Address, this)) return false;
270 result = decodeNEONLoadStoreInstruction32(MI, insn, Address, this);
273 // Add a fake predicate operand, because we share these instruction
274 // definitions with Thumb2 where these instructions are predicable.
275 if (!DecodePredicateOperand(MI, 0xE, Address, this)) return false;
280 result = decodeNEONDupInstruction32(MI, insn, Address, this);
283 // Add a fake predicate operand, because we share these instruction
284 // definitions with Thumb2 where these instructions are predicable.
285 if (!DecodePredicateOperand(MI, 0xE, Address, this)) return false;
295 extern MCInstrDesc ARMInsts[];
298 // Thumb1 instructions don't have explicit S bits. Rather, they
299 // implicitly set CPSR. Since it's not represented in the encoding, the
300 // auto-generated decoder won't inject the CPSR operand. We need to fix
301 // that as a post-pass.
302 static void AddThumb1SBit(MCInst &MI, bool InITBlock) {
303 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
304 MCInst::iterator I = MI.begin();
305 for (unsigned i = 0, e = MI.size(); i < e; ++i, ++I) {
306 if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) {
307 MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
312 if (OpInfo[MI.size()].isOptionalDef() &&
313 OpInfo[MI.size()].RegClass == ARM::CCRRegClassID)
314 MI.insert(MI.end(), MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
317 // Most Thumb instructions don't have explicit predicates in the
318 // encoding, but rather get their predicates from IT context. We need
319 // to fix up the predicate operands using this context information as a
321 void ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
322 // A few instructions actually have predicates encoded in them. Don't
323 // try to overwrite it if we're seeing one of those.
324 switch (MI.getOpcode()) {
332 // If we're in an IT block, base the predicate on that. Otherwise,
333 // assume a predicate of AL.
335 if (!ITBlock.empty()) {
341 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
342 MCInst::iterator I = MI.begin();
343 for (unsigned i = 0, e = MI.size(); i < e; ++i, ++I) {
344 if (OpInfo[i].isPredicate()) {
345 I = MI.insert(I, MCOperand::CreateImm(CC));
348 MI.insert(I, MCOperand::CreateReg(0));
350 MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
355 MI.insert(MI.end(), MCOperand::CreateImm(CC));
357 MI.insert(MI.end(), MCOperand::CreateReg(0));
359 MI.insert(MI.end(), MCOperand::CreateReg(ARM::CPSR));
362 // Thumb VFP instructions are a special case. Because we share their
363 // encodings between ARM and Thumb modes, and they are predicable in ARM
364 // mode, the auto-generated decoder will give them an (incorrect)
365 // predicate operand. We need to rewrite these operands based on the IT
366 // context as a post-pass.
367 void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
369 if (!ITBlock.empty()) {
375 const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
376 MCInst::iterator I = MI.begin();
377 for (unsigned i = 0, e = MI.size(); i < e; ++i, ++I) {
378 if (OpInfo[i].isPredicate() ) {
384 I->setReg(ARM::CPSR);
391 bool ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
392 const MemoryObject &Region,
393 uint64_t Address,raw_ostream &os) const {
396 // We want to read exactly 2 bytes of data.
397 if (Region.readBytes(Address, 2, (uint8_t*)bytes, NULL) == -1)
400 uint16_t insn16 = (bytes[1] << 8) | bytes[0];
401 bool result = decodeThumbInstruction16(MI, insn16, Address, this);
404 bool InITBlock = !ITBlock.empty();
405 AddThumbPredicate(MI);
406 AddThumb1SBit(MI, InITBlock);
411 result = decodeThumb2Instruction16(MI, insn16, Address, this);
414 AddThumbPredicate(MI);
416 // If we find an IT instruction, we need to parse its condition
417 // code and mask operands so that we can apply them correctly
418 // to the subsequent instructions.
419 if (MI.getOpcode() == ARM::t2IT) {
420 unsigned firstcond = MI.getOperand(0).getImm();
421 uint32_t mask = MI.getOperand(1).getImm();
422 unsigned zeros = CountTrailingZeros_32(mask);
425 for (unsigned i = 0; i < 4 - (zeros+1); ++i) {
426 if (firstcond ^ (mask & 1))
427 ITBlock.push_back(firstcond ^ 1);
429 ITBlock.push_back(firstcond);
432 ITBlock.push_back(firstcond);
438 // We want to read exactly 4 bytes of data.
439 if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1)
442 uint32_t insn32 = (bytes[3] << 8) |
447 result = decodeThumbInstruction32(MI, insn32, Address, this);
450 bool InITBlock = ITBlock.size();
451 AddThumbPredicate(MI);
452 AddThumb1SBit(MI, InITBlock);
457 result = decodeThumb2Instruction32(MI, insn32, Address, this);
460 AddThumbPredicate(MI);
465 result = decodeCommonInstruction32(MI, insn32, Address, this);
468 AddThumbPredicate(MI);
473 result = decodeVFPInstruction32(MI, insn32, Address, this);
476 UpdateThumbVFPPredicate(MI);
481 if (fieldFromInstruction32(insn32, 24, 4) == 0xF) {
482 uint32_t NEONDataInsn = insn32;
483 NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
484 NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
485 NEONDataInsn |= 0x12000000; // Set bits 28 and 25
486 result = decodeNEONDataInstruction32(MI, NEONDataInsn, Address, this);
489 AddThumbPredicate(MI);
495 result = decodeNEONLoadStoreInstruction32(MI, insn32, Address, this);
498 AddThumbPredicate(MI);
503 result = decodeNEONDupInstruction32(MI, insn32, Address, this);
506 AddThumbPredicate(MI);
514 extern "C" void LLVMInitializeARMDisassembler() {
515 TargetRegistry::RegisterMCDisassembler(TheARMTarget,
516 createARMDisassembler);
517 TargetRegistry::RegisterMCDisassembler(TheThumbTarget,
518 createThumbDisassembler);
521 static const unsigned GPRDecoderTable[] = {
522 ARM::R0, ARM::R1, ARM::R2, ARM::R3,
523 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
524 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
525 ARM::R12, ARM::SP, ARM::LR, ARM::PC
528 static bool DecodeGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
529 uint64_t Address, const void *Decoder) {
533 unsigned Register = GPRDecoderTable[RegNo];
534 Inst.addOperand(MCOperand::CreateReg(Register));
538 static bool DecodeGPRnopcRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
539 uint64_t Address, const void *Decoder) {
540 if (RegNo == 15) return false;
541 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
544 static bool DecodetGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
545 uint64_t Address, const void *Decoder) {
548 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
551 static bool DecodetcGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
552 uint64_t Address, const void *Decoder) {
553 unsigned Register = 0;
577 Inst.addOperand(MCOperand::CreateReg(Register));
581 static bool DecoderGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
582 uint64_t Address, const void *Decoder) {
583 if (RegNo == 13 || RegNo == 15) return false;
584 return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
587 static const unsigned SPRDecoderTable[] = {
588 ARM::S0, ARM::S1, ARM::S2, ARM::S3,
589 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
590 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
591 ARM::S12, ARM::S13, ARM::S14, ARM::S15,
592 ARM::S16, ARM::S17, ARM::S18, ARM::S19,
593 ARM::S20, ARM::S21, ARM::S22, ARM::S23,
594 ARM::S24, ARM::S25, ARM::S26, ARM::S27,
595 ARM::S28, ARM::S29, ARM::S30, ARM::S31
598 static bool DecodeSPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
599 uint64_t Address, const void *Decoder) {
603 unsigned Register = SPRDecoderTable[RegNo];
604 Inst.addOperand(MCOperand::CreateReg(Register));
608 static const unsigned DPRDecoderTable[] = {
609 ARM::D0, ARM::D1, ARM::D2, ARM::D3,
610 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
611 ARM::D8, ARM::D9, ARM::D10, ARM::D11,
612 ARM::D12, ARM::D13, ARM::D14, ARM::D15,
613 ARM::D16, ARM::D17, ARM::D18, ARM::D19,
614 ARM::D20, ARM::D21, ARM::D22, ARM::D23,
615 ARM::D24, ARM::D25, ARM::D26, ARM::D27,
616 ARM::D28, ARM::D29, ARM::D30, ARM::D31
619 static bool DecodeDPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
620 uint64_t Address, const void *Decoder) {
624 unsigned Register = DPRDecoderTable[RegNo];
625 Inst.addOperand(MCOperand::CreateReg(Register));
629 static bool DecodeDPR_8RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
630 uint64_t Address, const void *Decoder) {
633 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
636 static bool DecodeDPR_VFP2RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
637 uint64_t Address, const void *Decoder) {
640 return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
643 static const unsigned QPRDecoderTable[] = {
644 ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
645 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
646 ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
647 ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
651 static bool DecodeQPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
652 uint64_t Address, const void *Decoder) {
657 unsigned Register = QPRDecoderTable[RegNo];
658 Inst.addOperand(MCOperand::CreateReg(Register));
662 static bool DecodePredicateOperand(llvm::MCInst &Inst, unsigned Val,
663 uint64_t Address, const void *Decoder) {
664 if (Val == 0xF) return false;
665 // AL predicate is not allowed on Thumb1 branches.
666 if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
668 Inst.addOperand(MCOperand::CreateImm(Val));
669 if (Val == ARMCC::AL) {
670 Inst.addOperand(MCOperand::CreateReg(0));
672 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
676 static bool DecodeCCOutOperand(llvm::MCInst &Inst, unsigned Val,
677 uint64_t Address, const void *Decoder) {
679 Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
681 Inst.addOperand(MCOperand::CreateReg(0));
685 static bool DecodeSOImmOperand(llvm::MCInst &Inst, unsigned Val,
686 uint64_t Address, const void *Decoder) {
687 uint32_t imm = Val & 0xFF;
688 uint32_t rot = (Val & 0xF00) >> 7;
689 uint32_t rot_imm = (imm >> rot) | (imm << (32-rot));
690 Inst.addOperand(MCOperand::CreateImm(rot_imm));
694 static bool DecodeBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
695 uint64_t Address, const void *Decoder) {
697 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(Val)));
701 static bool DecodeSORegImmOperand(llvm::MCInst &Inst, unsigned Val,
702 uint64_t Address, const void *Decoder) {
704 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
705 unsigned type = fieldFromInstruction32(Val, 5, 2);
706 unsigned imm = fieldFromInstruction32(Val, 7, 5);
708 // Register-immediate
709 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
711 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
727 if (Shift == ARM_AM::ror && imm == 0)
730 unsigned Op = Shift | (imm << 3);
731 Inst.addOperand(MCOperand::CreateImm(Op));
736 static bool DecodeSORegRegOperand(llvm::MCInst &Inst, unsigned Val,
737 uint64_t Address, const void *Decoder) {
739 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
740 unsigned type = fieldFromInstruction32(Val, 5, 2);
741 unsigned Rs = fieldFromInstruction32(Val, 8, 4);
744 if (!DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)) return false;
745 if (!DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)) return false;
747 ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
763 Inst.addOperand(MCOperand::CreateImm(Shift));
768 static bool DecodeRegListOperand(llvm::MCInst &Inst, unsigned Val,
769 uint64_t Address, const void *Decoder) {
770 // Empty register lists are not allowed.
771 if (CountPopulation_32(Val) == 0) return false;
772 for (unsigned i = 0; i < 16; ++i) {
773 if (Val & (1 << i)) {
774 if (!DecodeGPRRegisterClass(Inst, i, Address, Decoder)) return false;
781 static bool DecodeSPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
782 uint64_t Address, const void *Decoder) {
783 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
784 unsigned regs = Val & 0xFF;
786 if (!DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)) return false;
787 for (unsigned i = 0; i < (regs - 1); ++i) {
788 if (!DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)) return false;
794 static bool DecodeDPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
795 uint64_t Address, const void *Decoder) {
796 unsigned Vd = fieldFromInstruction32(Val, 8, 4);
797 unsigned regs = (Val & 0xFF) / 2;
799 if (!DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)) return false;
800 for (unsigned i = 0; i < (regs - 1); ++i) {
801 if (!DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)) return false;
807 static bool DecodeBitfieldMaskOperand(llvm::MCInst &Inst, unsigned Val,
808 uint64_t Address, const void *Decoder) {
809 // This operand encodes a mask of contiguous zeros between a specified MSB
810 // and LSB. To decode it, we create the mask of all bits MSB-and-lower,
811 // the mask of all bits LSB-and-lower, and then xor them to create
812 // the mask of that's all ones on [msb, lsb]. Finally we not it to
813 // create the final mask.
814 unsigned msb = fieldFromInstruction32(Val, 5, 5);
815 unsigned lsb = fieldFromInstruction32(Val, 0, 5);
816 uint32_t msb_mask = (1 << (msb+1)) - 1;
817 uint32_t lsb_mask = (1 << lsb) - 1;
818 Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
822 static bool DecodeCopMemInstruction(llvm::MCInst &Inst, unsigned Insn,
823 uint64_t Address, const void *Decoder) {
824 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
825 unsigned CRd = fieldFromInstruction32(Insn, 12, 4);
826 unsigned coproc = fieldFromInstruction32(Insn, 8, 4);
827 unsigned imm = fieldFromInstruction32(Insn, 0, 8);
828 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
829 unsigned U = fieldFromInstruction32(Insn, 23, 1);
831 switch (Inst.getOpcode()) {
832 case ARM::LDC_OFFSET:
835 case ARM::LDC_OPTION:
836 case ARM::LDCL_OFFSET:
839 case ARM::LDCL_OPTION:
840 case ARM::STC_OFFSET:
843 case ARM::STC_OPTION:
844 case ARM::STCL_OFFSET:
847 case ARM::STCL_OPTION:
848 if (coproc == 0xA || coproc == 0xB)
855 Inst.addOperand(MCOperand::CreateImm(coproc));
856 Inst.addOperand(MCOperand::CreateImm(CRd));
857 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
858 switch (Inst.getOpcode()) {
859 case ARM::LDC_OPTION:
860 case ARM::LDCL_OPTION:
861 case ARM::LDC2_OPTION:
862 case ARM::LDC2L_OPTION:
863 case ARM::STC_OPTION:
864 case ARM::STCL_OPTION:
865 case ARM::STC2_OPTION:
866 case ARM::STC2L_OPTION:
871 Inst.addOperand(MCOperand::CreateReg(0));
875 unsigned P = fieldFromInstruction32(Insn, 24, 1);
876 unsigned W = fieldFromInstruction32(Insn, 21, 1);
878 bool writeback = (P == 0) || (W == 1);
879 unsigned idx_mode = 0;
881 idx_mode = ARMII::IndexModePre;
882 else if (!P && writeback)
883 idx_mode = ARMII::IndexModePost;
885 switch (Inst.getOpcode()) {
889 case ARM::LDC_OPTION:
890 case ARM::LDCL_OPTION:
891 case ARM::LDC2_OPTION:
892 case ARM::LDC2L_OPTION:
893 case ARM::STC_OPTION:
894 case ARM::STCL_OPTION:
895 case ARM::STC2_OPTION:
896 case ARM::STC2L_OPTION:
897 Inst.addOperand(MCOperand::CreateImm(imm));
901 Inst.addOperand(MCOperand::CreateImm(
902 ARM_AM::getAM2Opc(ARM_AM::add, imm, ARM_AM::lsl, idx_mode)));
904 Inst.addOperand(MCOperand::CreateImm(
905 ARM_AM::getAM2Opc(ARM_AM::sub, imm, ARM_AM::lsl, idx_mode)));
909 switch (Inst.getOpcode()) {
910 case ARM::LDC_OFFSET:
913 case ARM::LDC_OPTION:
914 case ARM::LDCL_OFFSET:
917 case ARM::LDCL_OPTION:
918 case ARM::STC_OFFSET:
921 case ARM::STC_OPTION:
922 case ARM::STCL_OFFSET:
925 case ARM::STCL_OPTION:
926 if (!DecodePredicateOperand(Inst, pred, Address, Decoder)) return false;
935 static bool DecodeAddrMode2IdxInstruction(llvm::MCInst &Inst, unsigned Insn,
936 uint64_t Address, const void *Decoder) {
937 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
938 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
939 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
940 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
941 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
942 unsigned reg = fieldFromInstruction32(Insn, 25, 1);
943 unsigned P = fieldFromInstruction32(Insn, 24, 1);
944 unsigned W = fieldFromInstruction32(Insn, 21, 1);
946 // On stores, the writeback operand precedes Rt.
947 switch (Inst.getOpcode()) {
948 case ARM::STR_POST_IMM:
949 case ARM::STR_POST_REG:
950 case ARM::STRB_POST_IMM:
951 case ARM::STRB_POST_REG:
952 case ARM::STRT_POST_REG:
953 case ARM::STRT_POST_IMM:
954 case ARM::STRBT_POST_REG:
955 case ARM::STRBT_POST_IMM:
956 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
962 if (!DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)) return false;
964 // On loads, the writeback operand comes after Rt.
965 switch (Inst.getOpcode()) {
966 case ARM::LDR_POST_IMM:
967 case ARM::LDR_POST_REG:
968 case ARM::LDRB_POST_IMM:
969 case ARM::LDRB_POST_REG:
972 case ARM::LDRBT_POST_REG:
973 case ARM::LDRBT_POST_IMM:
974 case ARM::LDRT_POST_REG:
975 case ARM::LDRT_POST_IMM:
976 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))
983 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
985 ARM_AM::AddrOpc Op = ARM_AM::add;
986 if (!fieldFromInstruction32(Insn, 23, 1))
989 bool writeback = (P == 0) || (W == 1);
990 unsigned idx_mode = 0;
992 idx_mode = ARMII::IndexModePre;
993 else if (!P && writeback)
994 idx_mode = ARMII::IndexModePost;
996 if (writeback && (Rn == 15 || Rn == Rt)) return false; // UNPREDICTABLE
999 if (!DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)) return false;
1000 ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
1001 switch( fieldFromInstruction32(Insn, 5, 2)) {
1017 unsigned amt = fieldFromInstruction32(Insn, 7, 5);
1018 unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
1020 Inst.addOperand(MCOperand::CreateImm(imm));
1022 Inst.addOperand(MCOperand::CreateReg(0));
1023 unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
1024 Inst.addOperand(MCOperand::CreateImm(tmp));
1027 if (!DecodePredicateOperand(Inst, pred, Address, Decoder)) return false;
1032 static bool DecodeSORegMemOperand(llvm::MCInst &Inst, unsigned Val,
1033 uint64_t Address, const void *Decoder) {
1034 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1035 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1036 unsigned type = fieldFromInstruction32(Val, 5, 2);
1037 unsigned imm = fieldFromInstruction32(Val, 7, 5);
1038 unsigned U = fieldFromInstruction32(Val, 12, 1);
1040 ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
1056 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1057 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
1060 shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
1062 shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
1063 Inst.addOperand(MCOperand::CreateImm(shift));
1068 static bool DecodeAddrMode3Instruction(llvm::MCInst &Inst, unsigned Insn,
1069 uint64_t Address, const void *Decoder) {
1070 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
1071 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1072 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1073 unsigned type = fieldFromInstruction32(Insn, 22, 1);
1074 unsigned imm = fieldFromInstruction32(Insn, 8, 4);
1075 unsigned U = ((~fieldFromInstruction32(Insn, 23, 1)) & 1) << 8;
1076 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1077 unsigned W = fieldFromInstruction32(Insn, 21, 1);
1078 unsigned P = fieldFromInstruction32(Insn, 24, 1);
1080 bool writeback = (W == 1) | (P == 0);
1081 if (writeback) { // Writeback
1083 U |= ARMII::IndexModePre << 9;
1085 U |= ARMII::IndexModePost << 9;
1087 // On stores, the writeback operand precedes Rt.
1088 switch (Inst.getOpcode()) {
1091 case ARM::STRD_POST:
1094 case ARM::STRH_POST:
1095 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))
1103 if (!DecodeGPRRegisterClass(Inst, Rt, Address, Decoder))
1105 switch (Inst.getOpcode()) {
1108 case ARM::STRD_POST:
1111 case ARM::LDRD_POST:
1112 if (!DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder))
1120 // On loads, the writeback operand comes after Rt.
1121 switch (Inst.getOpcode()) {
1124 case ARM::LDRD_POST:
1127 case ARM::LDRH_POST:
1129 case ARM::LDRSH_PRE:
1130 case ARM::LDRSH_POST:
1132 case ARM::LDRSB_PRE:
1133 case ARM::LDRSB_POST:
1136 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))
1144 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))
1148 Inst.addOperand(MCOperand::CreateReg(0));
1149 Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
1151 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))
1153 Inst.addOperand(MCOperand::CreateImm(U));
1156 if (!DecodePredicateOperand(Inst, pred, Address, Decoder)) return false;
1161 static bool DecodeRFEInstruction(llvm::MCInst &Inst, unsigned Insn,
1162 uint64_t Address, const void *Decoder) {
1163 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1164 unsigned mode = fieldFromInstruction32(Insn, 23, 2);
1181 Inst.addOperand(MCOperand::CreateImm(mode));
1182 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1187 static bool DecodeMemMultipleWritebackInstruction(llvm::MCInst &Inst,
1189 uint64_t Address, const void *Decoder) {
1190 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1191 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1192 unsigned reglist = fieldFromInstruction32(Insn, 0, 16);
1195 switch (Inst.getOpcode()) {
1197 Inst.setOpcode(ARM::RFEDA);
1199 case ARM::STMDA_UPD:
1200 Inst.setOpcode(ARM::RFEDA_UPD);
1203 Inst.setOpcode(ARM::RFEDB);
1205 case ARM::STMDB_UPD:
1206 Inst.setOpcode(ARM::RFEDB_UPD);
1209 Inst.setOpcode(ARM::RFEIA);
1211 case ARM::STMIA_UPD:
1212 Inst.setOpcode(ARM::RFEIA_UPD);
1215 Inst.setOpcode(ARM::RFEIB);
1217 case ARM::STMIB_UPD:
1218 Inst.setOpcode(ARM::RFEIB_UPD);
1221 return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
1224 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder) ||
1225 !DecodeGPRRegisterClass(Inst, Rn, Address, Decoder) || // Tied
1226 !DecodePredicateOperand(Inst, pred, Address, Decoder) ||
1227 !DecodeRegListOperand(Inst, reglist, Address, Decoder))
1233 static bool DecodeCPSInstruction(llvm::MCInst &Inst, unsigned Insn,
1234 uint64_t Address, const void *Decoder) {
1235 unsigned imod = fieldFromInstruction32(Insn, 18, 2);
1236 unsigned M = fieldFromInstruction32(Insn, 17, 1);
1237 unsigned iflags = fieldFromInstruction32(Insn, 6, 3);
1238 unsigned mode = fieldFromInstruction32(Insn, 0, 5);
1240 // imod == '01' --> UNPREDICTABLE
1241 if (imod == 1) return false;
1243 if (M && mode && imod && iflags) {
1244 Inst.setOpcode(ARM::CPS3p);
1245 Inst.addOperand(MCOperand::CreateImm(imod));
1246 Inst.addOperand(MCOperand::CreateImm(iflags));
1247 Inst.addOperand(MCOperand::CreateImm(mode));
1249 } else if (!mode && !M) {
1250 Inst.setOpcode(ARM::CPS2p);
1251 Inst.addOperand(MCOperand::CreateImm(imod));
1252 Inst.addOperand(MCOperand::CreateImm(iflags));
1254 } else if (!imod && !iflags && M) {
1255 Inst.setOpcode(ARM::CPS1p);
1256 Inst.addOperand(MCOperand::CreateImm(mode));
1263 static bool DecodeSMLAInstruction(llvm::MCInst &Inst, unsigned Insn,
1264 uint64_t Address, const void *Decoder) {
1265 unsigned Rd = fieldFromInstruction32(Insn, 16, 4);
1266 unsigned Rn = fieldFromInstruction32(Insn, 0, 4);
1267 unsigned Rm = fieldFromInstruction32(Insn, 8, 4);
1268 unsigned Ra = fieldFromInstruction32(Insn, 12, 4);
1269 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1272 return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
1274 if (!DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder) ||
1275 !DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder) ||
1276 !DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder) ||
1277 !DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder))
1280 if (!DecodePredicateOperand(Inst, pred, Address, Decoder)) return false;
1285 static bool DecodeAddrModeImm12Operand(llvm::MCInst &Inst, unsigned Val,
1286 uint64_t Address, const void *Decoder) {
1287 unsigned add = fieldFromInstruction32(Val, 12, 1);
1288 unsigned imm = fieldFromInstruction32(Val, 0, 12);
1289 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
1291 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))
1294 if (!add) imm *= -1;
1295 if (imm == 0 && !add) imm = INT32_MIN;
1296 Inst.addOperand(MCOperand::CreateImm(imm));
1301 static bool DecodeAddrMode5Operand(llvm::MCInst &Inst, unsigned Val,
1302 uint64_t Address, const void *Decoder) {
1303 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
1304 unsigned U = fieldFromInstruction32(Val, 8, 1);
1305 unsigned imm = fieldFromInstruction32(Val, 0, 8);
1307 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder))
1311 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
1313 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
1318 static bool DecodeAddrMode7Operand(llvm::MCInst &Inst, unsigned Val,
1319 uint64_t Address, const void *Decoder) {
1320 return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
1323 static bool DecodeBranchImmInstruction(llvm::MCInst &Inst, unsigned Insn,
1324 uint64_t Address, const void *Decoder) {
1325 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
1326 unsigned imm = fieldFromInstruction32(Insn, 0, 24) << 2;
1329 Inst.setOpcode(ARM::BLXi);
1330 imm |= fieldFromInstruction32(Insn, 24, 1) << 1;
1331 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1335 Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
1336 if (!DecodePredicateOperand(Inst, pred, Address, Decoder)) return false;
1342 static bool DecodeVCVTImmOperand(llvm::MCInst &Inst, unsigned Val,
1343 uint64_t Address, const void *Decoder) {
1344 Inst.addOperand(MCOperand::CreateImm(64 - Val));
1348 static bool DecodeAddrMode6Operand(llvm::MCInst &Inst, unsigned Val,
1349 uint64_t Address, const void *Decoder) {
1350 unsigned Rm = fieldFromInstruction32(Val, 0, 4);
1351 unsigned align = fieldFromInstruction32(Val, 4, 2);
1353 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))
1356 Inst.addOperand(MCOperand::CreateImm(0));
1358 Inst.addOperand(MCOperand::CreateImm(4 << align));
1363 static bool DecodeVLDInstruction(llvm::MCInst &Inst, unsigned Insn,
1364 uint64_t Address, const void *Decoder) {
1365 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1366 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1367 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
1368 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1369 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
1370 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1372 // First output register
1373 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
1375 // Second output register
1376 switch (Inst.getOpcode()) {
1381 case ARM::VLD1q8_UPD:
1382 case ARM::VLD1q16_UPD:
1383 case ARM::VLD1q32_UPD:
1384 case ARM::VLD1q64_UPD:
1389 case ARM::VLD1d8T_UPD:
1390 case ARM::VLD1d16T_UPD:
1391 case ARM::VLD1d32T_UPD:
1392 case ARM::VLD1d64T_UPD:
1397 case ARM::VLD1d8Q_UPD:
1398 case ARM::VLD1d16Q_UPD:
1399 case ARM::VLD1d32Q_UPD:
1400 case ARM::VLD1d64Q_UPD:
1404 case ARM::VLD2d8_UPD:
1405 case ARM::VLD2d16_UPD:
1406 case ARM::VLD2d32_UPD:
1410 case ARM::VLD2q8_UPD:
1411 case ARM::VLD2q16_UPD:
1412 case ARM::VLD2q32_UPD:
1416 case ARM::VLD3d8_UPD:
1417 case ARM::VLD3d16_UPD:
1418 case ARM::VLD3d32_UPD:
1422 case ARM::VLD4d8_UPD:
1423 case ARM::VLD4d16_UPD:
1424 case ARM::VLD4d32_UPD:
1425 if (!DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)) return false;
1430 case ARM::VLD2b8_UPD:
1431 case ARM::VLD2b16_UPD:
1432 case ARM::VLD2b32_UPD:
1436 case ARM::VLD3q8_UPD:
1437 case ARM::VLD3q16_UPD:
1438 case ARM::VLD3q32_UPD:
1442 case ARM::VLD4q8_UPD:
1443 case ARM::VLD4q16_UPD:
1444 case ARM::VLD4q32_UPD:
1445 if (!DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)) return false;
1450 // Third output register
1451 switch(Inst.getOpcode()) {
1456 case ARM::VLD1d8T_UPD:
1457 case ARM::VLD1d16T_UPD:
1458 case ARM::VLD1d32T_UPD:
1459 case ARM::VLD1d64T_UPD:
1464 case ARM::VLD1d8Q_UPD:
1465 case ARM::VLD1d16Q_UPD:
1466 case ARM::VLD1d32Q_UPD:
1467 case ARM::VLD1d64Q_UPD:
1471 case ARM::VLD2q8_UPD:
1472 case ARM::VLD2q16_UPD:
1473 case ARM::VLD2q32_UPD:
1477 case ARM::VLD3d8_UPD:
1478 case ARM::VLD3d16_UPD:
1479 case ARM::VLD3d32_UPD:
1483 case ARM::VLD4d8_UPD:
1484 case ARM::VLD4d16_UPD:
1485 case ARM::VLD4d32_UPD:
1486 if (!DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)) return false;
1491 case ARM::VLD3q8_UPD:
1492 case ARM::VLD3q16_UPD:
1493 case ARM::VLD3q32_UPD:
1497 case ARM::VLD4q8_UPD:
1498 case ARM::VLD4q16_UPD:
1499 case ARM::VLD4q32_UPD:
1500 if (!DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)) return false;
1506 // Fourth output register
1507 switch (Inst.getOpcode()) {
1512 case ARM::VLD1d8Q_UPD:
1513 case ARM::VLD1d16Q_UPD:
1514 case ARM::VLD1d32Q_UPD:
1515 case ARM::VLD1d64Q_UPD:
1519 case ARM::VLD2q8_UPD:
1520 case ARM::VLD2q16_UPD:
1521 case ARM::VLD2q32_UPD:
1525 case ARM::VLD4d8_UPD:
1526 case ARM::VLD4d16_UPD:
1527 case ARM::VLD4d32_UPD:
1528 if (!DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)) return false;
1533 case ARM::VLD4q8_UPD:
1534 case ARM::VLD4q16_UPD:
1535 case ARM::VLD4q32_UPD:
1536 if (!DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)) return false;
1542 // Writeback operand
1543 switch (Inst.getOpcode()) {
1544 case ARM::VLD1d8_UPD:
1545 case ARM::VLD1d16_UPD:
1546 case ARM::VLD1d32_UPD:
1547 case ARM::VLD1d64_UPD:
1548 case ARM::VLD1q8_UPD:
1549 case ARM::VLD1q16_UPD:
1550 case ARM::VLD1q32_UPD:
1551 case ARM::VLD1q64_UPD:
1552 case ARM::VLD1d8T_UPD:
1553 case ARM::VLD1d16T_UPD:
1554 case ARM::VLD1d32T_UPD:
1555 case ARM::VLD1d64T_UPD:
1556 case ARM::VLD1d8Q_UPD:
1557 case ARM::VLD1d16Q_UPD:
1558 case ARM::VLD1d32Q_UPD:
1559 case ARM::VLD1d64Q_UPD:
1560 case ARM::VLD2d8_UPD:
1561 case ARM::VLD2d16_UPD:
1562 case ARM::VLD2d32_UPD:
1563 case ARM::VLD2q8_UPD:
1564 case ARM::VLD2q16_UPD:
1565 case ARM::VLD2q32_UPD:
1566 case ARM::VLD2b8_UPD:
1567 case ARM::VLD2b16_UPD:
1568 case ARM::VLD2b32_UPD:
1569 case ARM::VLD3d8_UPD:
1570 case ARM::VLD3d16_UPD:
1571 case ARM::VLD3d32_UPD:
1572 case ARM::VLD3q8_UPD:
1573 case ARM::VLD3q16_UPD:
1574 case ARM::VLD3q32_UPD:
1575 case ARM::VLD4d8_UPD:
1576 case ARM::VLD4d16_UPD:
1577 case ARM::VLD4d32_UPD:
1578 case ARM::VLD4q8_UPD:
1579 case ARM::VLD4q16_UPD:
1580 case ARM::VLD4q32_UPD:
1581 if (!DecodeGPRRegisterClass(Inst, wb, Address, Decoder)) return false;
1587 // AddrMode6 Base (register+alignment)
1588 if (!DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)) return false;
1590 // AddrMode6 Offset (register)
1592 Inst.addOperand(MCOperand::CreateReg(0));
1593 else if (Rm != 0xF) {
1594 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder))
1601 static bool DecodeVSTInstruction(llvm::MCInst &Inst, unsigned Insn,
1602 uint64_t Address, const void *Decoder) {
1603 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1604 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1605 unsigned wb = fieldFromInstruction32(Insn, 16, 4);
1606 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1607 Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
1608 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1610 // Writeback Operand
1611 switch (Inst.getOpcode()) {
1612 case ARM::VST1d8_UPD:
1613 case ARM::VST1d16_UPD:
1614 case ARM::VST1d32_UPD:
1615 case ARM::VST1d64_UPD:
1616 case ARM::VST1q8_UPD:
1617 case ARM::VST1q16_UPD:
1618 case ARM::VST1q32_UPD:
1619 case ARM::VST1q64_UPD:
1620 case ARM::VST1d8T_UPD:
1621 case ARM::VST1d16T_UPD:
1622 case ARM::VST1d32T_UPD:
1623 case ARM::VST1d64T_UPD:
1624 case ARM::VST1d8Q_UPD:
1625 case ARM::VST1d16Q_UPD:
1626 case ARM::VST1d32Q_UPD:
1627 case ARM::VST1d64Q_UPD:
1628 case ARM::VST2d8_UPD:
1629 case ARM::VST2d16_UPD:
1630 case ARM::VST2d32_UPD:
1631 case ARM::VST2q8_UPD:
1632 case ARM::VST2q16_UPD:
1633 case ARM::VST2q32_UPD:
1634 case ARM::VST2b8_UPD:
1635 case ARM::VST2b16_UPD:
1636 case ARM::VST2b32_UPD:
1637 case ARM::VST3d8_UPD:
1638 case ARM::VST3d16_UPD:
1639 case ARM::VST3d32_UPD:
1640 case ARM::VST3q8_UPD:
1641 case ARM::VST3q16_UPD:
1642 case ARM::VST3q32_UPD:
1643 case ARM::VST4d8_UPD:
1644 case ARM::VST4d16_UPD:
1645 case ARM::VST4d32_UPD:
1646 case ARM::VST4q8_UPD:
1647 case ARM::VST4q16_UPD:
1648 case ARM::VST4q32_UPD:
1649 if (!DecodeGPRRegisterClass(Inst, wb, Address, Decoder))
1656 // AddrMode6 Base (register+alignment)
1657 if (!DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)) return false;
1659 // AddrMode6 Offset (register)
1661 Inst.addOperand(MCOperand::CreateReg(0));
1662 else if (Rm != 0xF) {
1663 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
1666 // First input register
1667 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
1669 // Second input register
1670 switch (Inst.getOpcode()) {
1675 case ARM::VST1q8_UPD:
1676 case ARM::VST1q16_UPD:
1677 case ARM::VST1q32_UPD:
1678 case ARM::VST1q64_UPD:
1683 case ARM::VST1d8T_UPD:
1684 case ARM::VST1d16T_UPD:
1685 case ARM::VST1d32T_UPD:
1686 case ARM::VST1d64T_UPD:
1691 case ARM::VST1d8Q_UPD:
1692 case ARM::VST1d16Q_UPD:
1693 case ARM::VST1d32Q_UPD:
1694 case ARM::VST1d64Q_UPD:
1698 case ARM::VST2d8_UPD:
1699 case ARM::VST2d16_UPD:
1700 case ARM::VST2d32_UPD:
1704 case ARM::VST2q8_UPD:
1705 case ARM::VST2q16_UPD:
1706 case ARM::VST2q32_UPD:
1710 case ARM::VST3d8_UPD:
1711 case ARM::VST3d16_UPD:
1712 case ARM::VST3d32_UPD:
1716 case ARM::VST4d8_UPD:
1717 case ARM::VST4d16_UPD:
1718 case ARM::VST4d32_UPD:
1719 if (!DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)) return false;
1724 case ARM::VST2b8_UPD:
1725 case ARM::VST2b16_UPD:
1726 case ARM::VST2b32_UPD:
1730 case ARM::VST3q8_UPD:
1731 case ARM::VST3q16_UPD:
1732 case ARM::VST3q32_UPD:
1736 case ARM::VST4q8_UPD:
1737 case ARM::VST4q16_UPD:
1738 case ARM::VST4q32_UPD:
1739 if (!DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)) return false;
1745 // Third input register
1746 switch (Inst.getOpcode()) {
1751 case ARM::VST1d8T_UPD:
1752 case ARM::VST1d16T_UPD:
1753 case ARM::VST1d32T_UPD:
1754 case ARM::VST1d64T_UPD:
1759 case ARM::VST1d8Q_UPD:
1760 case ARM::VST1d16Q_UPD:
1761 case ARM::VST1d32Q_UPD:
1762 case ARM::VST1d64Q_UPD:
1766 case ARM::VST2q8_UPD:
1767 case ARM::VST2q16_UPD:
1768 case ARM::VST2q32_UPD:
1772 case ARM::VST3d8_UPD:
1773 case ARM::VST3d16_UPD:
1774 case ARM::VST3d32_UPD:
1778 case ARM::VST4d8_UPD:
1779 case ARM::VST4d16_UPD:
1780 case ARM::VST4d32_UPD:
1781 if (!DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)) return false;
1786 case ARM::VST3q8_UPD:
1787 case ARM::VST3q16_UPD:
1788 case ARM::VST3q32_UPD:
1792 case ARM::VST4q8_UPD:
1793 case ARM::VST4q16_UPD:
1794 case ARM::VST4q32_UPD:
1795 if (!DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)) return false;
1801 // Fourth input register
1802 switch (Inst.getOpcode()) {
1807 case ARM::VST1d8Q_UPD:
1808 case ARM::VST1d16Q_UPD:
1809 case ARM::VST1d32Q_UPD:
1810 case ARM::VST1d64Q_UPD:
1814 case ARM::VST2q8_UPD:
1815 case ARM::VST2q16_UPD:
1816 case ARM::VST2q32_UPD:
1820 case ARM::VST4d8_UPD:
1821 case ARM::VST4d16_UPD:
1822 case ARM::VST4d32_UPD:
1823 if (!DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)) return false;
1828 case ARM::VST4q8_UPD:
1829 case ARM::VST4q16_UPD:
1830 case ARM::VST4q32_UPD:
1831 if (!DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)) return false;
1840 static bool DecodeVLD1DupInstruction(llvm::MCInst &Inst, unsigned Insn,
1841 uint64_t Address, const void *Decoder) {
1842 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1843 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1844 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1845 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1846 unsigned align = fieldFromInstruction32(Insn, 4, 1);
1847 unsigned size = fieldFromInstruction32(Insn, 6, 2);
1848 unsigned regs = fieldFromInstruction32(Insn, 5, 1) + 1;
1850 align *= (1 << size);
1852 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
1854 if (!DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)) return false;
1857 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1860 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1861 Inst.addOperand(MCOperand::CreateImm(align));
1864 Inst.addOperand(MCOperand::CreateReg(0));
1865 else if (Rm != 0xF) {
1866 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
1872 static bool DecodeVLD2DupInstruction(llvm::MCInst &Inst, unsigned Insn,
1873 uint64_t Address, const void *Decoder) {
1874 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1875 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1876 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1877 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1878 unsigned align = fieldFromInstruction32(Insn, 4, 1);
1879 unsigned size = 1 << fieldFromInstruction32(Insn, 6, 2);
1880 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
1883 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
1884 if (!DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)) return false;
1886 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1889 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1890 Inst.addOperand(MCOperand::CreateImm(align));
1893 Inst.addOperand(MCOperand::CreateReg(0));
1894 else if (Rm != 0xF) {
1895 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
1901 static bool DecodeVLD3DupInstruction(llvm::MCInst &Inst, unsigned Insn,
1902 uint64_t Address, const void *Decoder) {
1903 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1904 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1905 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1906 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1907 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
1909 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder) ||
1910 !DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder) ||
1911 !DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder))
1914 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1917 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1918 Inst.addOperand(MCOperand::CreateImm(0));
1921 Inst.addOperand(MCOperand::CreateReg(0));
1922 else if (Rm != 0xF) {
1923 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
1929 static bool DecodeVLD4DupInstruction(llvm::MCInst &Inst, unsigned Insn,
1930 uint64_t Address, const void *Decoder) {
1931 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1932 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1933 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
1934 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
1935 unsigned size = fieldFromInstruction32(Insn, 6, 2);
1936 unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
1937 unsigned align = fieldFromInstruction32(Insn, 4, 1);
1952 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder) ||
1953 !DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder) ||
1954 !DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder) ||
1955 !DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder))
1958 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1961 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
1962 Inst.addOperand(MCOperand::CreateImm(align));
1965 Inst.addOperand(MCOperand::CreateReg(0));
1966 else if (Rm != 0xF) {
1967 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
1973 static bool DecodeNEONModImmInstruction(llvm::MCInst &Inst, unsigned Insn,
1974 uint64_t Address, const void *Decoder) {
1975 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
1976 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
1977 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
1978 imm |= fieldFromInstruction32(Insn, 16, 3) << 4;
1979 imm |= fieldFromInstruction32(Insn, 24, 1) << 7;
1980 imm |= fieldFromInstruction32(Insn, 8, 4) << 8;
1981 imm |= fieldFromInstruction32(Insn, 5, 1) << 12;
1982 unsigned Q = fieldFromInstruction32(Insn, 6, 1);
1985 if (!DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
1987 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
1990 Inst.addOperand(MCOperand::CreateImm(imm));
1992 switch (Inst.getOpcode()) {
1993 case ARM::VORRiv4i16:
1994 case ARM::VORRiv2i32:
1995 case ARM::VBICiv4i16:
1996 case ARM::VBICiv2i32:
1997 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
1999 case ARM::VORRiv8i16:
2000 case ARM::VORRiv4i32:
2001 case ARM::VBICiv8i16:
2002 case ARM::VBICiv4i32:
2003 if (!DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
2012 static bool DecodeVSHLMaxInstruction(llvm::MCInst &Inst, unsigned Insn,
2013 uint64_t Address, const void *Decoder) {
2014 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2015 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2016 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2017 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2018 unsigned size = fieldFromInstruction32(Insn, 18, 2);
2020 if (!DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
2021 if (!DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
2022 Inst.addOperand(MCOperand::CreateImm(8 << size));
2027 static bool DecodeShiftRight8Imm(llvm::MCInst &Inst, unsigned Val,
2028 uint64_t Address, const void *Decoder) {
2029 Inst.addOperand(MCOperand::CreateImm(8 - Val));
2033 static bool DecodeShiftRight16Imm(llvm::MCInst &Inst, unsigned Val,
2034 uint64_t Address, const void *Decoder) {
2035 Inst.addOperand(MCOperand::CreateImm(16 - Val));
2039 static bool DecodeShiftRight32Imm(llvm::MCInst &Inst, unsigned Val,
2040 uint64_t Address, const void *Decoder) {
2041 Inst.addOperand(MCOperand::CreateImm(32 - Val));
2045 static bool DecodeShiftRight64Imm(llvm::MCInst &Inst, unsigned Val,
2046 uint64_t Address, const void *Decoder) {
2047 Inst.addOperand(MCOperand::CreateImm(64 - Val));
2051 static bool DecodeTBLInstruction(llvm::MCInst &Inst, unsigned Insn,
2052 uint64_t Address, const void *Decoder) {
2053 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2054 Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
2055 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2056 Rn |= fieldFromInstruction32(Insn, 7, 1) << 4;
2057 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2058 Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
2059 unsigned op = fieldFromInstruction32(Insn, 6, 1);
2060 unsigned length = fieldFromInstruction32(Insn, 8, 2) + 1;
2062 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
2064 if (!DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)) return false; // Writeback
2067 for (unsigned i = 0; i < length; ++i) {
2068 if (!DecodeDPRRegisterClass(Inst, (Rn+i)%32, Address, Decoder)) return false;
2071 if (!DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
2076 static bool DecodeVFPfpImm(llvm::MCInst &Inst, unsigned Val,
2077 uint64_t Address, const void *Decoder) {
2078 // The immediate needs to be a fully instantiated float. However, the
2079 // auto-generated decoder is only able to fill in some of the bits
2080 // necessary. For instance, the 'b' bit is replicated multiple times,
2081 // and is even present in inverted form in one bit. We do a little
2082 // binary parsing here to fill in those missing bits, and then
2083 // reinterpret it all as a float.
2089 fp_conv.integer = Val;
2090 uint32_t b = fieldFromInstruction32(Val, 25, 1);
2091 fp_conv.integer |= b << 26;
2092 fp_conv.integer |= b << 27;
2093 fp_conv.integer |= b << 28;
2094 fp_conv.integer |= b << 29;
2095 fp_conv.integer |= (~b & 0x1) << 30;
2097 Inst.addOperand(MCOperand::CreateFPImm(fp_conv.fp));
2101 static bool DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn,
2102 uint64_t Address, const void *Decoder) {
2103 unsigned dst = fieldFromInstruction16(Insn, 8, 3);
2104 unsigned imm = fieldFromInstruction16(Insn, 0, 8);
2106 if (!DecodetGPRRegisterClass(Inst, dst, Address, Decoder)) return false;
2108 if (Inst.getOpcode() == ARM::tADR)
2109 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
2110 else if (Inst.getOpcode() == ARM::tADDrSPi)
2111 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2115 Inst.addOperand(MCOperand::CreateImm(imm));
2119 static bool DecodeThumbBROperand(llvm::MCInst &Inst, unsigned Val,
2120 uint64_t Address, const void *Decoder) {
2121 Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
2125 static bool DecodeT2BROperand(llvm::MCInst &Inst, unsigned Val,
2126 uint64_t Address, const void *Decoder) {
2127 Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
2131 static bool DecodeThumbCmpBROperand(llvm::MCInst &Inst, unsigned Val,
2132 uint64_t Address, const void *Decoder) {
2133 Inst.addOperand(MCOperand::CreateImm(SignExtend32<7>(Val << 1)));
2137 static bool DecodeThumbAddrModeRR(llvm::MCInst &Inst, unsigned Val,
2138 uint64_t Address, const void *Decoder) {
2139 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2140 unsigned Rm = fieldFromInstruction32(Val, 3, 3);
2142 if (!DecodetGPRRegisterClass(Inst, Rn, Address, Decoder) ||
2143 !DecodetGPRRegisterClass(Inst, Rm, Address, Decoder))
2149 static bool DecodeThumbAddrModeIS(llvm::MCInst &Inst, unsigned Val,
2150 uint64_t Address, const void *Decoder) {
2151 unsigned Rn = fieldFromInstruction32(Val, 0, 3);
2152 unsigned imm = fieldFromInstruction32(Val, 3, 5);
2154 if (!DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
2155 Inst.addOperand(MCOperand::CreateImm(imm));
2160 static bool DecodeThumbAddrModePC(llvm::MCInst &Inst, unsigned Val,
2161 uint64_t Address, const void *Decoder) {
2162 Inst.addOperand(MCOperand::CreateImm(Val << 2));
2167 static bool DecodeThumbAddrModeSP(llvm::MCInst &Inst, unsigned Val,
2168 uint64_t Address, const void *Decoder) {
2169 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2170 Inst.addOperand(MCOperand::CreateImm(Val << 2));
2175 static bool DecodeT2AddrModeSOReg(llvm::MCInst &Inst, unsigned Val,
2176 uint64_t Address, const void *Decoder) {
2177 unsigned Rn = fieldFromInstruction32(Val, 6, 4);
2178 unsigned Rm = fieldFromInstruction32(Val, 2, 4);
2179 unsigned imm = fieldFromInstruction32(Val, 0, 2);
2181 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder) ||
2182 !DecoderGPRRegisterClass(Inst, Rm, Address, Decoder))
2184 Inst.addOperand(MCOperand::CreateImm(imm));
2189 static bool DecodeT2LoadShift(llvm::MCInst &Inst, unsigned Insn,
2190 uint64_t Address, const void *Decoder) {
2191 if (Inst.getOpcode() != ARM::t2PLDs) {
2192 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2193 if (!DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)) return false;
2196 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2198 switch (Inst.getOpcode()) {
2200 Inst.setOpcode(ARM::t2LDRBpci);
2203 Inst.setOpcode(ARM::t2LDRHpci);
2206 Inst.setOpcode(ARM::t2LDRSHpci);
2209 Inst.setOpcode(ARM::t2LDRSBpci);
2212 Inst.setOpcode(ARM::t2PLDi12);
2213 Inst.addOperand(MCOperand::CreateReg(ARM::PC));
2219 int imm = fieldFromInstruction32(Insn, 0, 12);
2220 if (!fieldFromInstruction32(Insn, 23, 1)) imm *= -1;
2221 Inst.addOperand(MCOperand::CreateImm(imm));
2226 unsigned addrmode = fieldFromInstruction32(Insn, 4, 2);
2227 addrmode |= fieldFromInstruction32(Insn, 0, 4) << 2;
2228 addrmode |= fieldFromInstruction32(Insn, 16, 4) << 6;
2229 DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder);
2234 static bool DecodeT2Imm8S4(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 << 2));
2243 static bool DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val,
2244 uint64_t Address, const void *Decoder) {
2245 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2246 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2248 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder) ||
2249 !DecodeT2Imm8S4(Inst, imm, Address, Decoder))
2255 static bool DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
2256 uint64_t Address, const void *Decoder) {
2257 int imm = Val & 0xFF;
2258 if (!(Val & 0x100)) imm *= -1;
2259 Inst.addOperand(MCOperand::CreateImm(imm));
2265 static bool DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val,
2266 uint64_t Address, const void *Decoder) {
2267 unsigned Rn = fieldFromInstruction32(Val, 9, 4);
2268 unsigned imm = fieldFromInstruction32(Val, 0, 9);
2270 // Some instructions always use an additive offset.
2271 switch (Inst.getOpcode()) {
2283 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder) ||
2284 !DecodeT2Imm8(Inst, imm, Address, Decoder))
2291 static bool DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val,
2292 uint64_t Address, const void *Decoder) {
2293 unsigned Rn = fieldFromInstruction32(Val, 13, 4);
2294 unsigned imm = fieldFromInstruction32(Val, 0, 12);
2296 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
2297 Inst.addOperand(MCOperand::CreateImm(imm));
2303 static bool DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Insn,
2304 uint64_t Address, const void *Decoder) {
2305 unsigned imm = fieldFromInstruction16(Insn, 0, 7);
2307 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2308 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2309 Inst.addOperand(MCOperand::CreateImm(imm));
2314 static bool DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn,
2315 uint64_t Address, const void *Decoder) {
2316 if (Inst.getOpcode() == ARM::tADDrSP) {
2317 unsigned Rdm = fieldFromInstruction16(Insn, 0, 3);
2318 Rdm |= fieldFromInstruction16(Insn, 7, 1) << 3;
2320 if (!DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)) return false;
2321 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2322 if (!DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)) return false;
2323 } else if (Inst.getOpcode() == ARM::tADDspr) {
2324 unsigned Rm = fieldFromInstruction16(Insn, 3, 4);
2326 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2327 Inst.addOperand(MCOperand::CreateReg(ARM::SP));
2328 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
2334 static bool DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn,
2335 uint64_t Address, const void *Decoder) {
2336 unsigned imod = fieldFromInstruction16(Insn, 4, 1) | 0x2;
2337 unsigned flags = fieldFromInstruction16(Insn, 0, 3);
2339 Inst.addOperand(MCOperand::CreateImm(imod));
2340 Inst.addOperand(MCOperand::CreateImm(flags));
2345 static bool DecodePostIdxReg(llvm::MCInst &Inst, unsigned Insn,
2346 uint64_t Address, const void *Decoder) {
2347 unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
2348 unsigned add = fieldFromInstruction32(Insn, 4, 1);
2350 if (!DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)) return false;
2351 Inst.addOperand(MCOperand::CreateImm(add));
2356 static bool DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Val,
2357 uint64_t Address, const void *Decoder) {
2358 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
2362 static bool DecodeCoprocessor(llvm::MCInst &Inst, unsigned Val,
2363 uint64_t Address, const void *Decoder) {
2364 if (Val == 0xA || Val == 0xB)
2367 Inst.addOperand(MCOperand::CreateImm(Val));
2371 static bool DecodeThumbSRImm(llvm::MCInst &Inst, unsigned Val,
2372 uint64_t Address, const void *Decoder) {
2374 Inst.addOperand(MCOperand::CreateImm(32));
2376 Inst.addOperand(MCOperand::CreateImm(Val));
2380 static bool DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Insn,
2381 uint64_t Address, const void *Decoder) {
2382 unsigned pred = fieldFromInstruction32(Insn, 22, 4);
2383 if (pred == 0xE || pred == 0xF) {
2384 unsigned opc = fieldFromInstruction32(Insn, 4, 2);
2389 Inst.setOpcode(ARM::t2DSB);
2392 Inst.setOpcode(ARM::t2DMB);
2395 Inst.setOpcode(ARM::t2ISB);
2399 unsigned imm = fieldFromInstruction32(Insn, 0, 4);
2400 return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
2403 unsigned brtarget = fieldFromInstruction32(Insn, 0, 11) << 1;
2404 brtarget |= fieldFromInstruction32(Insn, 11, 1) << 19;
2405 brtarget |= fieldFromInstruction32(Insn, 13, 1) << 18;
2406 brtarget |= fieldFromInstruction32(Insn, 16, 6) << 12;
2407 brtarget |= fieldFromInstruction32(Insn, 26, 1) << 20;
2409 if (!DecodeT2BROperand(Inst, brtarget, Address, Decoder) ||
2410 !DecodePredicateOperand(Inst, pred, Address, Decoder))
2416 // Decode a shifted immediate operand. These basically consist
2417 // of an 8-bit value, and a 4-bit directive that specifies either
2418 // a splat operation or a rotation.
2419 static bool DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val,
2420 uint64_t Address, const void *Decoder) {
2421 unsigned ctrl = fieldFromInstruction32(Val, 10, 2);
2423 unsigned byte = fieldFromInstruction32(Val, 8, 2);
2424 unsigned imm = fieldFromInstruction32(Val, 0, 8);
2427 Inst.addOperand(MCOperand::CreateImm(imm));
2430 Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
2433 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
2436 Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
2441 unsigned unrot = fieldFromInstruction32(Val, 0, 7) | 0x80;
2442 unsigned rot = fieldFromInstruction32(Val, 7, 5);
2443 unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
2444 Inst.addOperand(MCOperand::CreateImm(imm));
2450 static bool DecodeThumbBCCTargetOperand(llvm::MCInst &Inst, unsigned Val,
2451 uint64_t Address, const void *Decoder){
2452 Inst.addOperand(MCOperand::CreateImm(Val << 1));
2456 static bool DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
2457 uint64_t Address, const void *Decoder){
2458 Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
2462 static bool DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Val,
2463 uint64_t Address, const void *Decoder) {
2478 Inst.addOperand(MCOperand::CreateImm(Val));
2482 static bool DecodeMSRMask(llvm::MCInst &Inst, unsigned Val,
2483 uint64_t Address, const void *Decoder) {
2484 if (!Val) return false;
2485 Inst.addOperand(MCOperand::CreateImm(Val));
2489 static bool DecodeDoubleRegLoad(llvm::MCInst &Inst, unsigned Insn,
2490 uint64_t Address, const void *Decoder) {
2491 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2492 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2493 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
2495 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return false;
2497 if (!DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)) return false;
2498 if (!DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)) return false;
2499 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
2500 if (!DecodePredicateOperand(Inst, pred, Address, Decoder)) return false;
2506 static bool DecodeDoubleRegStore(llvm::MCInst &Inst, unsigned Insn,
2507 uint64_t Address, const void *Decoder) {
2508 unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
2509 unsigned Rt = fieldFromInstruction32(Insn, 0, 4);
2510 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2511 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
2513 if (!DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)) return false;
2515 if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return false;
2516 if (Rd == Rn || Rd == Rt || Rd == Rt+1) return false;
2518 if (!DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)) return false;
2519 if (!DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)) return false;
2520 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
2521 if (!DecodePredicateOperand(Inst, pred, Address, Decoder)) return false;
2526 static bool DecodeSTRPreImm(llvm::MCInst &Inst, unsigned Insn,
2527 uint64_t Address, const void *Decoder) {
2528 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2529 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2530 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
2531 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
2532 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
2533 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
2535 if (Rn == 0xF || Rn == Rt) return false; // UNPREDICTABLE
2537 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
2538 if (!DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)) return false;
2539 if (!DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)) return false;
2540 if (!DecodePredicateOperand(Inst, pred, Address, Decoder)) return false;
2545 static bool DecodeSTRPreReg(llvm::MCInst &Inst, unsigned Insn,
2546 uint64_t Address, const void *Decoder) {
2547 unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
2548 unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
2549 unsigned imm = fieldFromInstruction32(Insn, 0, 12);
2550 imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
2551 imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
2552 unsigned pred = fieldFromInstruction32(Insn, 28, 4);
2554 if (Rn == 0xF || Rn == Rt) return false; // UNPREDICTABLE
2556 if (!DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)) return false;
2557 if (!DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)) return false;
2558 if (!DecodeSORegMemOperand(Inst, imm, Address, Decoder)) return false;
2559 if (!DecodePredicateOperand(Inst, pred, Address, Decoder)) return false;