void setITState(char Firstcond, char Mask) {
// (3 - the number of trailing zeros) is the number of then / else.
unsigned CondBit0 = Firstcond & 1;
- unsigned NumTZ = CountTrailingZeros_32(Mask);
+ unsigned NumTZ = countTrailingZeros<uint8_t>(Mask);
unsigned char CCBits = static_cast<unsigned char>(Firstcond & 0xf);
assert(NumTZ <= 3 && "Invalid IT mask!");
// push condition codes onto the stack the correct order for the pops
static DecodeStatus DecodeGPRnopcRegisterClass(MCInst &Inst,
unsigned RegNo, uint64_t Address,
const void *Decoder);
+static DecodeStatus DecodeGPRwithAPSRRegisterClass(MCInst &Inst,
+ unsigned RegNo, uint64_t Address,
+ const void *Decoder);
static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder);
static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder);
+static DecodeStatus DecodeGPRPairRegisterClass(MCInst &Inst, unsigned RegNo,
+ uint64_t Address, const void *Decoder);
static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
+static DecodeStatus DecodeVLDST1Instruction(MCInst &Inst, unsigned Val,
+ uint64_t Address, const void *Decoder);
+static DecodeStatus DecodeVLDST2Instruction(MCInst &Inst, unsigned Val,
+ uint64_t Address, const void *Decoder);
+static DecodeStatus DecodeVLDST3Instruction(MCInst &Inst, unsigned Val,
+ uint64_t Address, const void *Decoder);
+static DecodeStatus DecodeVLDST4Instruction(MCInst &Inst, unsigned Val,
+ uint64_t Address, const void *Decoder);
static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
+static DecodeStatus DecodeInstSyncBarrierOption(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder);
static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
+static DecodeStatus DecodeImm0_4(MCInst &Inst, unsigned Insn, uint64_t Address,
+ const void *Decoder);
static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
+static DecodeStatus DecodeT2LoadImm8(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void* Decoder);
+static DecodeStatus DecodeT2LoadImm12(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void* Decoder);
+static DecodeStatus DecodeT2LoadT(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void* Decoder);
+static DecodeStatus DecodeT2LoadLabel(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void* Decoder);
static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
uint64_t Address, const void *Decoder);
+static DecodeStatus DecodeQADDInstruction(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder);
static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
"Asked to disassemble an ARM instruction but Subtarget is in Thumb mode!");
// We want to read exactly 4 bytes of data.
- if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
+ if (Region.readBytes(Address, 4, bytes) == -1) {
Size = 0;
return MCDisassembler::Fail;
}
return result;
}
+ MI.clear();
+ result = decodeInstruction(DecoderTableVFPV832, MI, insn, Address, this, STI);
+ if (result != MCDisassembler::Fail) {
+ Size = 4;
+ return result;
+ }
+
MI.clear();
result = decodeInstruction(DecoderTableNEONData32, MI, insn, Address,
this, STI);
bool isBranch, uint64_t InstSize,
MCInst &MI, const void *Decoder) {
const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
- LLVMOpInfoCallback getOpInfo = Dis->getLLVMOpInfoCallback();
- struct LLVMOpInfo1 SymbolicOp;
- memset(&SymbolicOp, '\0', sizeof(struct LLVMOpInfo1));
- SymbolicOp.Value = Value;
- void *DisInfo = Dis->getDisInfoBlock();
-
- if (!getOpInfo ||
- !getOpInfo(DisInfo, Address, 0 /* Offset */, InstSize, 1, &SymbolicOp)) {
- // Clear SymbolicOp.Value from above and also all other fields.
- memset(&SymbolicOp, '\0', sizeof(struct LLVMOpInfo1));
- LLVMSymbolLookupCallback SymbolLookUp = Dis->getLLVMSymbolLookupCallback();
- if (!SymbolLookUp)
- return false;
- uint64_t ReferenceType;
- if (isBranch)
- ReferenceType = LLVMDisassembler_ReferenceType_In_Branch;
- else
- ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
- const char *ReferenceName;
- uint64_t SymbolValue = 0x00000000ffffffffULL & Value;
- const char *Name = SymbolLookUp(DisInfo, SymbolValue, &ReferenceType,
- Address, &ReferenceName);
- if (Name) {
- SymbolicOp.AddSymbol.Name = Name;
- SymbolicOp.AddSymbol.Present = true;
- }
- // For branches always create an MCExpr so it gets printed as hex address.
- else if (isBranch) {
- SymbolicOp.Value = Value;
- }
- if(ReferenceType == LLVMDisassembler_ReferenceType_Out_SymbolStub)
- (*Dis->CommentStream) << "symbol stub for: " << ReferenceName;
- if (!Name && !isBranch)
- return false;
- }
-
- MCContext *Ctx = Dis->getMCContext();
- const MCExpr *Add = NULL;
- if (SymbolicOp.AddSymbol.Present) {
- if (SymbolicOp.AddSymbol.Name) {
- StringRef Name(SymbolicOp.AddSymbol.Name);
- MCSymbol *Sym = Ctx->GetOrCreateSymbol(Name);
- Add = MCSymbolRefExpr::Create(Sym, *Ctx);
- } else {
- Add = MCConstantExpr::Create(SymbolicOp.AddSymbol.Value, *Ctx);
- }
- }
-
- const MCExpr *Sub = NULL;
- if (SymbolicOp.SubtractSymbol.Present) {
- if (SymbolicOp.SubtractSymbol.Name) {
- StringRef Name(SymbolicOp.SubtractSymbol.Name);
- MCSymbol *Sym = Ctx->GetOrCreateSymbol(Name);
- Sub = MCSymbolRefExpr::Create(Sym, *Ctx);
- } else {
- Sub = MCConstantExpr::Create(SymbolicOp.SubtractSymbol.Value, *Ctx);
- }
- }
-
- const MCExpr *Off = NULL;
- if (SymbolicOp.Value != 0)
- Off = MCConstantExpr::Create(SymbolicOp.Value, *Ctx);
-
- const MCExpr *Expr;
- if (Sub) {
- const MCExpr *LHS;
- if (Add)
- LHS = MCBinaryExpr::CreateSub(Add, Sub, *Ctx);
- else
- LHS = MCUnaryExpr::CreateMinus(Sub, *Ctx);
- if (Off != 0)
- Expr = MCBinaryExpr::CreateAdd(LHS, Off, *Ctx);
- else
- Expr = LHS;
- } else if (Add) {
- if (Off != 0)
- Expr = MCBinaryExpr::CreateAdd(Add, Off, *Ctx);
- else
- Expr = Add;
- } else {
- if (Off != 0)
- Expr = Off;
- else
- Expr = MCConstantExpr::Create(0, *Ctx);
- }
-
- if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_ARM_HI16)
- MI.addOperand(MCOperand::CreateExpr(ARMMCExpr::CreateUpper16(Expr, *Ctx)));
- else if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_ARM_LO16)
- MI.addOperand(MCOperand::CreateExpr(ARMMCExpr::CreateLower16(Expr, *Ctx)));
- else if (SymbolicOp.VariantKind == LLVMDisassembler_VariantKind_None)
- MI.addOperand(MCOperand::CreateExpr(Expr));
- else
- llvm_unreachable("bad SymbolicOp.VariantKind");
-
- return true;
+ // FIXME: Does it make sense for value to be negative?
+ return Dis->tryAddingSymbolicOperand(MI, (uint32_t)Value, Address, isBranch,
+ /* Offset */ 0, InstSize);
}
/// tryAddingPcLoadReferenceComment - trys to add a comment as to what is being
static void tryAddingPcLoadReferenceComment(uint64_t Address, int Value,
const void *Decoder) {
const MCDisassembler *Dis = static_cast<const MCDisassembler*>(Decoder);
- LLVMSymbolLookupCallback SymbolLookUp = Dis->getLLVMSymbolLookupCallback();
- if (SymbolLookUp) {
- void *DisInfo = Dis->getDisInfoBlock();
- uint64_t ReferenceType;
- ReferenceType = LLVMDisassembler_ReferenceType_In_PCrel_Load;
- const char *ReferenceName;
- (void)SymbolLookUp(DisInfo, Value, &ReferenceType, Address, &ReferenceName);
- if(ReferenceType == LLVMDisassembler_ReferenceType_Out_LitPool_SymAddr ||
- ReferenceType == LLVMDisassembler_ReferenceType_Out_LitPool_CstrAddr)
- (*Dis->CommentStream) << "literal pool for: " << ReferenceName;
- }
+ Dis->tryAddingPcLoadReferenceComment(Value, Address);
}
// Thumb1 instructions don't have explicit S bits. Rather, they
"Asked to disassemble in Thumb mode but Subtarget is in ARM mode!");
// We want to read exactly 2 bytes of data.
- if (Region.readBytes(Address, 2, (uint8_t*)bytes, NULL) == -1) {
+ if (Region.readBytes(Address, 2, bytes) == -1) {
Size = 0;
return MCDisassembler::Fail;
}
}
// We want to read exactly 4 bytes of data.
- if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
+ if (Region.readBytes(Address, 4, bytes) == -1) {
Size = 0;
return MCDisassembler::Fail;
}
return result;
}
+ if (fieldFromInstruction(insn32, 28, 4) == 0xE) {
+ MI.clear();
+ result = decodeInstruction(DecoderTableVFP32, MI, insn32, Address, this, STI);
+ if (result != MCDisassembler::Fail) {
+ Size = 4;
+ UpdateThumbVFPPredicate(MI);
+ return result;
+ }
+ }
+
MI.clear();
- result = decodeInstruction(DecoderTableVFP32, MI, insn32, Address, this, STI);
+ result = decodeInstruction(DecoderTableVFPV832, MI, insn32, Address, this, STI);
if (result != MCDisassembler::Fail) {
Size = 4;
UpdateThumbVFPPredicate(MI);
return result;
}
- MI.clear();
- result = decodeInstruction(DecoderTableNEONDup32, MI, insn32, Address,
- this, STI);
- if (result != MCDisassembler::Fail) {
- Size = 4;
- Check(result, AddThumbPredicate(MI));
- return result;
+ if (fieldFromInstruction(insn32, 28, 4) == 0xE) {
+ MI.clear();
+ result = decodeInstruction(DecoderTableNEONDup32, MI, insn32, Address,
+ this, STI);
+ if (result != MCDisassembler::Fail) {
+ Size = 4;
+ Check(result, AddThumbPredicate(MI));
+ return result;
+ }
}
if (fieldFromInstruction(insn32, 24, 8) == 0xF9) {
return S;
}
+static DecodeStatus
+DecodeGPRwithAPSRRegisterClass(MCInst &Inst, unsigned RegNo,
+ uint64_t Address, const void *Decoder) {
+ DecodeStatus S = MCDisassembler::Success;
+
+ if (RegNo == 15)
+ {
+ Inst.addOperand(MCOperand::CreateReg(ARM::APSR_NZCV));
+ return MCDisassembler::Success;
+ }
+
+ Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
+ return S;
+}
+
static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder) {
if (RegNo > 7)
return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
}
+static const uint16_t GPRPairDecoderTable[] = {
+ ARM::R0_R1, ARM::R2_R3, ARM::R4_R5, ARM::R6_R7,
+ ARM::R8_R9, ARM::R10_R11, ARM::R12_SP
+};
+
+static DecodeStatus DecodeGPRPairRegisterClass(MCInst &Inst, unsigned RegNo,
+ uint64_t Address, const void *Decoder) {
+ DecodeStatus S = MCDisassembler::Success;
+
+ if (RegNo > 13)
+ return MCDisassembler::Fail;
+
+ if ((RegNo & 1) || RegNo == 0xe)
+ S = MCDisassembler::SoftFail;
+
+ unsigned RegisterPair = GPRPairDecoderTable[RegNo/2];
+ Inst.addOperand(MCOperand::CreateReg(RegisterPair));
+ return S;
+}
+
static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder) {
unsigned Register = 0;
static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder) {
- if (RegNo == 13 || RegNo == 15) return MCDisassembler::Fail;
- return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
+ DecodeStatus S = MCDisassembler::Success;
+ if (RegNo == 13 || RegNo == 15)
+ S = MCDisassembler::SoftFail;
+ Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
+ return S;
}
static const uint16_t SPRDecoderTable[] = {
static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder) {
- if (RegNo > 31)
+ if (RegNo > 31 || (RegNo & 1) != 0)
return MCDisassembler::Fail;
RegNo >>= 1;
}
// Empty register lists are not allowed.
- if (CountPopulation_32(Val) == 0) return MCDisassembler::Fail;
+ if (Val == 0) return MCDisassembler::Fail;
for (unsigned i = 0; i < 16; ++i) {
if (Val & (1 << i)) {
if (!Check(S, DecodeGPRRegisterClass(Inst, i, Address, Decoder)))
unsigned Vd = fieldFromInstruction(Val, 8, 5);
unsigned regs = fieldFromInstruction(Val, 0, 8);
+ // In case of unpredictable encoding, tweak the operands.
+ if (regs == 0 || (Vd + regs) > 32) {
+ regs = Vd + regs > 32 ? 32 - Vd : regs;
+ regs = std::max( 1u, regs);
+ S = MCDisassembler::SoftFail;
+ }
+
if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
return MCDisassembler::Fail;
for (unsigned i = 0; i < (regs - 1); ++i) {
DecodeStatus S = MCDisassembler::Success;
unsigned Vd = fieldFromInstruction(Val, 8, 5);
- unsigned regs = fieldFromInstruction(Val, 0, 8);
+ unsigned regs = fieldFromInstruction(Val, 1, 7);
- regs = regs >> 1;
+ // In case of unpredictable encoding, tweak the operands.
+ if (regs == 0 || regs > 16 || (Vd + regs) > 32) {
+ regs = Vd + regs > 32 ? 32 - Vd : regs;
+ regs = std::max( 1u, regs);
+ regs = std::min(16u, regs);
+ S = MCDisassembler::SoftFail;
+ }
if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
return MCDisassembler::Fail;
return S;
}
+static DecodeStatus DecodeQADDInstruction(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder) {
+ DecodeStatus S = MCDisassembler::Success;
+
+ unsigned Rd = fieldFromInstruction(Insn, 12, 4);
+ unsigned Rm = fieldFromInstruction(Insn, 0, 4);
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned pred = fieldFromInstruction(Insn, 28, 4);
+
+ if (pred == 0xF)
+ return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
+
+ if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
+ return MCDisassembler::Fail;
+ if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
+ return MCDisassembler::Fail;
+ if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
+ return MCDisassembler::Fail;
+ if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
+ return MCDisassembler::Fail;
+ return S;
+}
+
static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst &Inst,
unsigned Insn,
uint64_t Address, const void *Decoder) {
unsigned reglist = fieldFromInstruction(Insn, 0, 16);
if (pred == 0xF) {
+ // Ambiguous with RFE and SRS
switch (Inst.getOpcode()) {
case ARM::LDMDA:
Inst.setOpcode(ARM::RFEDA);
Inst.setOpcode(ARM::SRSIB_UPD);
break;
default:
- if (!Check(S, MCDisassembler::Fail)) return MCDisassembler::Fail;
+ return MCDisassembler::Fail;
}
// For stores (which become SRS's, the only operand is the mode.
if (fieldFromInstruction(Insn, 20, 1) == 0) {
+ // Check SRS encoding constraints
+ if (!(fieldFromInstruction(Insn, 22, 1) == 1 &&
+ fieldFromInstruction(Insn, 20, 1) == 0))
+ return MCDisassembler::Fail;
+
Inst.addOperand(
MCOperand::CreateImm(fieldFromInstruction(Insn, 0, 4)));
return S;
DecodeStatus S = MCDisassembler::Success;
+ // This decoder is called from multiple location that do not check
+ // the full encoding is valid before they do.
+ if (fieldFromInstruction(Insn, 5, 1) != 0 ||
+ fieldFromInstruction(Insn, 16, 1) != 0 ||
+ fieldFromInstruction(Insn, 20, 8) != 0x10)
+ return MCDisassembler::Fail;
+
// imod == '01' --> UNPREDICTABLE
// NOTE: Even though this is technically UNPREDICTABLE, we choose to
// return failure here. The '01' imod value is unprintable, so there's
Inst.addOperand(MCOperand::CreateImm(mode));
if (iflags) S = MCDisassembler::SoftFail;
} else {
- // imod == '00' && M == '0' --> UNPREDICTABLE
- Inst.setOpcode(ARM::t2CPS1p);
- Inst.addOperand(MCOperand::CreateImm(mode));
- S = MCDisassembler::SoftFail;
+ // imod == '00' && M == '0' --> this is a HINT instruction
+ int imm = fieldFromInstruction(Insn, 0, 8);
+ // HINT are defined only for immediate in [0..4]
+ if(imm > 4) return MCDisassembler::Fail;
+ Inst.setOpcode(ARM::t2HINT);
+ Inst.addOperand(MCOperand::CreateImm(imm));
}
return S;
imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
if (Inst.getOpcode() == ARM::MOVTi16)
- if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
+ if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler::Fail;
- if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
+
+ if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler::Fail;
if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
unsigned imm10 = fieldFromInstruction(Insn, 16, 10);
unsigned imm11 = fieldFromInstruction(Insn, 0, 11);
unsigned tmp = (S << 23) | (I1 << 22) | (I2 << 21) | (imm10 << 11) | imm11;
- int imm32 = SignExtend32<24>(tmp << 1);
+ int imm32 = SignExtend32<25>(tmp << 1);
if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
true, 4, Inst, Decoder))
Inst.addOperand(MCOperand::CreateImm(imm32));
return S;
}
+static DecodeStatus DecodeVLDST1Instruction(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder) {
+ unsigned type = fieldFromInstruction(Insn, 8, 4);
+ unsigned align = fieldFromInstruction(Insn, 4, 2);
+ if (type == 6 && (align & 2)) return MCDisassembler::Fail;
+ if (type == 7 && (align & 2)) return MCDisassembler::Fail;
+ if (type == 10 && align == 3) return MCDisassembler::Fail;
+
+ unsigned load = fieldFromInstruction(Insn, 21, 1);
+ return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
+ : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
+}
+
+static DecodeStatus DecodeVLDST2Instruction(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder) {
+ unsigned size = fieldFromInstruction(Insn, 6, 2);
+ if (size == 3) return MCDisassembler::Fail;
+
+ unsigned type = fieldFromInstruction(Insn, 8, 4);
+ unsigned align = fieldFromInstruction(Insn, 4, 2);
+ if (type == 8 && align == 3) return MCDisassembler::Fail;
+ if (type == 9 && align == 3) return MCDisassembler::Fail;
+
+ unsigned load = fieldFromInstruction(Insn, 21, 1);
+ return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
+ : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
+}
+
+static DecodeStatus DecodeVLDST3Instruction(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder) {
+ unsigned size = fieldFromInstruction(Insn, 6, 2);
+ if (size == 3) return MCDisassembler::Fail;
+
+ unsigned align = fieldFromInstruction(Insn, 4, 2);
+ if (align & 2) return MCDisassembler::Fail;
+
+ unsigned load = fieldFromInstruction(Insn, 21, 1);
+ return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
+ : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
+}
+
+static DecodeStatus DecodeVLDST4Instruction(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder) {
+ unsigned size = fieldFromInstruction(Insn, 6, 2);
+ if (size == 3) return MCDisassembler::Fail;
+
+ unsigned load = fieldFromInstruction(Insn, 21, 1);
+ return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
+ : DecodeVSTInstruction(Inst, Insn, Address, Decoder);
+}
+
static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
- if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<7>(Val<<1) + 4,
+ if (!tryAddingSymbolicOperand(Address, Address + (Val<<1) + 4,
true, 2, Inst, Decoder))
- Inst.addOperand(MCOperand::CreateImm(SignExtend32<7>(Val << 1)));
+ Inst.addOperand(MCOperand::CreateImm(Val << 1));
return MCDisassembler::Success;
}
unsigned Rm = fieldFromInstruction(Val, 2, 4);
unsigned imm = fieldFromInstruction(Val, 0, 2);
+ // Thumb stores cannot use PC as dest register.
+ switch (Inst.getOpcode()) {
+ case ARM::t2STRHs:
+ case ARM::t2STRBs:
+ case ARM::t2STRs:
+ if (Rn == 15)
+ return MCDisassembler::Fail;
+ default:
+ break;
+ }
+
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler::Fail;
if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
+ unsigned Rt = fieldFromInstruction(Insn, 12, 4);
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+
+ if (Rn == 15) {
+ switch (Inst.getOpcode()) {
+ case ARM::t2LDRBs:
+ Inst.setOpcode(ARM::t2LDRBpci);
+ break;
+ case ARM::t2LDRHs:
+ Inst.setOpcode(ARM::t2LDRHpci);
+ break;
+ case ARM::t2LDRSHs:
+ Inst.setOpcode(ARM::t2LDRSHpci);
+ break;
+ case ARM::t2LDRSBs:
+ Inst.setOpcode(ARM::t2LDRSBpci);
+ break;
+ case ARM::t2LDRs:
+ Inst.setOpcode(ARM::t2LDRpci);
+ break;
+ case ARM::t2PLDs:
+ Inst.setOpcode(ARM::t2PLDpci);
+ break;
+ case ARM::t2PLIs:
+ Inst.setOpcode(ARM::t2PLIpci);
+ break;
+ default:
+ return MCDisassembler::Fail;
+ }
+
+ return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
+ }
+
+ if (Rt == 15) {
+ switch (Inst.getOpcode()) {
+ case ARM::t2LDRSHs:
+ return MCDisassembler::Fail;
+ case ARM::t2LDRHs:
+ // FIXME: this instruction is only available with MP extensions,
+ // this should be checked first but we don't have access to the
+ // feature bits here.
+ Inst.setOpcode(ARM::t2PLDWs);
+ break;
+ default:
+ break;
+ }
+ }
+
switch (Inst.getOpcode()) {
case ARM::t2PLDs:
case ARM::t2PLDWs:
case ARM::t2PLIs:
break;
- default: {
- unsigned Rt = fieldFromInstruction(Insn, 12, 4);
- if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
+ default:
+ if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
+ return MCDisassembler::Fail;
+ }
+
+ unsigned addrmode = fieldFromInstruction(Insn, 4, 2);
+ addrmode |= fieldFromInstruction(Insn, 0, 4) << 2;
+ addrmode |= fieldFromInstruction(Insn, 16, 4) << 6;
+ if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
return MCDisassembler::Fail;
+
+ return S;
+}
+
+static DecodeStatus DecodeT2LoadImm8(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void* Decoder) {
+ DecodeStatus S = MCDisassembler::Success;
+
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned Rt = fieldFromInstruction(Insn, 12, 4);
+ unsigned U = fieldFromInstruction(Insn, 9, 1);
+ unsigned imm = fieldFromInstruction(Insn, 0, 8);
+ imm |= (U << 8);
+ imm |= (Rn << 9);
+
+ if (Rn == 15) {
+ switch (Inst.getOpcode()) {
+ case ARM::t2LDRi8:
+ Inst.setOpcode(ARM::t2LDRpci);
+ break;
+ case ARM::t2LDRBi8:
+ Inst.setOpcode(ARM::t2LDRBpci);
+ break;
+ case ARM::t2LDRSBi8:
+ Inst.setOpcode(ARM::t2LDRSBpci);
+ break;
+ case ARM::t2LDRHi8:
+ Inst.setOpcode(ARM::t2LDRHpci);
+ break;
+ case ARM::t2LDRSHi8:
+ Inst.setOpcode(ARM::t2LDRSHpci);
+ break;
+ case ARM::t2PLDi8:
+ Inst.setOpcode(ARM::t2PLDpci);
+ break;
+ case ARM::t2PLIi8:
+ Inst.setOpcode(ARM::t2PLIpci);
+ break;
+ default:
+ return MCDisassembler::Fail;
+ }
+ return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
+ }
+
+ if (Rt == 15) {
+ switch (Inst.getOpcode()) {
+ case ARM::t2LDRSHi8:
+ return MCDisassembler::Fail;
+ default:
+ break;
}
}
+ switch (Inst.getOpcode()) {
+ case ARM::t2PLDi8:
+ case ARM::t2PLIi8:
+ break;
+ default:
+ if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
+ return MCDisassembler::Fail;
+ }
+
+ if (!Check(S, DecodeT2AddrModeImm8(Inst, imm, Address, Decoder)))
+ return MCDisassembler::Fail;
+ return S;
+}
+
+static DecodeStatus DecodeT2LoadImm12(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void* Decoder) {
+ DecodeStatus S = MCDisassembler::Success;
+
unsigned Rn = fieldFromInstruction(Insn, 16, 4);
- if (Rn == 0xF) {
+ unsigned Rt = fieldFromInstruction(Insn, 12, 4);
+ unsigned imm = fieldFromInstruction(Insn, 0, 12);
+ imm |= (Rn << 13);
+
+ if (Rn == 15) {
switch (Inst.getOpcode()) {
- case ARM::t2LDRBs:
- Inst.setOpcode(ARM::t2LDRBpci);
- break;
- case ARM::t2LDRHs:
- Inst.setOpcode(ARM::t2LDRHpci);
- break;
- case ARM::t2LDRSHs:
- Inst.setOpcode(ARM::t2LDRSHpci);
- break;
- case ARM::t2LDRSBs:
- Inst.setOpcode(ARM::t2LDRSBpci);
+ case ARM::t2LDRi12:
+ Inst.setOpcode(ARM::t2LDRpci);
+ break;
+ case ARM::t2LDRHi12:
+ Inst.setOpcode(ARM::t2LDRHpci);
+ break;
+ case ARM::t2LDRSHi12:
+ Inst.setOpcode(ARM::t2LDRSHpci);
+ break;
+ case ARM::t2LDRBi12:
+ Inst.setOpcode(ARM::t2LDRBpci);
+ break;
+ case ARM::t2LDRSBi12:
+ Inst.setOpcode(ARM::t2LDRSBpci);
+ break;
+ case ARM::t2PLDi12:
+ Inst.setOpcode(ARM::t2PLDpci);
+ break;
+ case ARM::t2PLIi12:
+ Inst.setOpcode(ARM::t2PLIpci);
+ break;
+ default:
+ return MCDisassembler::Fail;
+ }
+ return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
+ }
+
+ if (Rt == 15) {
+ switch (Inst.getOpcode()) {
+ case ARM::t2LDRSHi12:
+ return MCDisassembler::Fail;
+ case ARM::t2LDRHi12:
+ Inst.setOpcode(ARM::t2PLDi12);
+ break;
+ default:
+ break;
+ }
+ }
+
+ switch (Inst.getOpcode()) {
+ case ARM::t2PLDi12:
+ case ARM::t2PLIi12:
+ break;
+ default:
+ if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
+ return MCDisassembler::Fail;
+ }
+
+ if (!Check(S, DecodeT2AddrModeImm12(Inst, imm, Address, Decoder)))
+ return MCDisassembler::Fail;
+ return S;
+}
+
+static DecodeStatus DecodeT2LoadT(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void* Decoder) {
+ DecodeStatus S = MCDisassembler::Success;
+
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned Rt = fieldFromInstruction(Insn, 12, 4);
+ unsigned imm = fieldFromInstruction(Insn, 0, 8);
+ imm |= (Rn << 9);
+
+ if (Rn == 15) {
+ switch (Inst.getOpcode()) {
+ case ARM::t2LDRT:
+ Inst.setOpcode(ARM::t2LDRpci);
+ break;
+ case ARM::t2LDRBT:
+ Inst.setOpcode(ARM::t2LDRBpci);
+ break;
+ case ARM::t2LDRHT:
+ Inst.setOpcode(ARM::t2LDRHpci);
+ break;
+ case ARM::t2LDRSBT:
+ Inst.setOpcode(ARM::t2LDRSBpci);
+ break;
+ case ARM::t2LDRSHT:
+ Inst.setOpcode(ARM::t2LDRSHpci);
+ break;
+ default:
+ return MCDisassembler::Fail;
+ }
+ return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
+ }
+
+ if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
+ return MCDisassembler::Fail;
+ if (!Check(S, DecodeT2AddrModeImm8(Inst, imm, Address, Decoder)))
+ return MCDisassembler::Fail;
+ return S;
+}
+
+static DecodeStatus DecodeT2LoadLabel(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void* Decoder) {
+ DecodeStatus S = MCDisassembler::Success;
+
+ unsigned Rt = fieldFromInstruction(Insn, 12, 4);
+ unsigned U = fieldFromInstruction(Insn, 23, 1);
+ int imm = fieldFromInstruction(Insn, 0, 12);
+
+ if (Rt == 15) {
+ switch (Inst.getOpcode()) {
+ case ARM::t2LDRBpci:
+ case ARM::t2LDRHpci:
+ Inst.setOpcode(ARM::t2PLDpci);
break;
- case ARM::t2PLDs:
- Inst.setOpcode(ARM::t2PLDi12);
- Inst.addOperand(MCOperand::CreateReg(ARM::PC));
+ case ARM::t2LDRSBpci:
+ Inst.setOpcode(ARM::t2PLIpci);
break;
- default:
+ case ARM::t2LDRSHpci:
return MCDisassembler::Fail;
+ default:
+ break;
}
+ }
- int imm = fieldFromInstruction(Insn, 0, 12);
- if (!fieldFromInstruction(Insn, 23, 1)) imm *= -1;
- Inst.addOperand(MCOperand::CreateImm(imm));
-
- return S;
+ switch(Inst.getOpcode()) {
+ case ARM::t2PLDpci:
+ case ARM::t2PLIpci:
+ break;
+ default:
+ if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
+ return MCDisassembler::Fail;
}
- unsigned addrmode = fieldFromInstruction(Insn, 4, 2);
- addrmode |= fieldFromInstruction(Insn, 0, 4) << 2;
- addrmode |= fieldFromInstruction(Insn, 16, 4) << 6;
- if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
- return MCDisassembler::Fail;
+ if (!U) {
+ // Special case for #-0.
+ if (imm == 0)
+ imm = INT32_MIN;
+ else
+ imm = -imm;
+ }
+ Inst.addOperand(MCOperand::CreateImm(imm));
return S;
}
unsigned Rn = fieldFromInstruction(Val, 9, 4);
unsigned imm = fieldFromInstruction(Val, 0, 9);
+ // Thumb stores cannot use PC as dest register.
+ switch (Inst.getOpcode()) {
+ case ARM::t2STRT:
+ case ARM::t2STRBT:
+ case ARM::t2STRHT:
+ case ARM::t2STRi8:
+ case ARM::t2STRHi8:
+ case ARM::t2STRBi8:
+ if (Rn == 15)
+ return MCDisassembler::Fail;
+ break;
+ default:
+ break;
+ }
+
// Some instructions always use an additive offset.
switch (Inst.getOpcode()) {
case ARM::t2LDRT:
addr |= Rn << 9;
unsigned load = fieldFromInstruction(Insn, 20, 1);
+ if (Rn == 15) {
+ switch (Inst.getOpcode()) {
+ case ARM::t2LDR_PRE:
+ case ARM::t2LDR_POST:
+ Inst.setOpcode(ARM::t2LDRpci);
+ break;
+ case ARM::t2LDRB_PRE:
+ case ARM::t2LDRB_POST:
+ Inst.setOpcode(ARM::t2LDRBpci);
+ break;
+ case ARM::t2LDRH_PRE:
+ case ARM::t2LDRH_POST:
+ Inst.setOpcode(ARM::t2LDRHpci);
+ break;
+ case ARM::t2LDRSB_PRE:
+ case ARM::t2LDRSB_POST:
+ if (Rt == 15)
+ Inst.setOpcode(ARM::t2PLIpci);
+ else
+ Inst.setOpcode(ARM::t2LDRSBpci);
+ break;
+ case ARM::t2LDRSH_PRE:
+ case ARM::t2LDRSH_POST:
+ Inst.setOpcode(ARM::t2LDRSHpci);
+ break;
+ default:
+ return MCDisassembler::Fail;
+ }
+ return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
+ }
+
if (!load) {
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler::Fail;
unsigned Rn = fieldFromInstruction(Val, 13, 4);
unsigned imm = fieldFromInstruction(Val, 0, 12);
+ // Thumb stores cannot use PC as dest register.
+ switch (Inst.getOpcode()) {
+ case ARM::t2STRi12:
+ case ARM::t2STRBi12:
+ case ARM::t2STRHi12:
+ if (Rn == 15)
+ return MCDisassembler::Fail;
+ default:
+ break;
+ }
+
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler::Fail;
Inst.addOperand(MCOperand::CreateImm(imm));
return MCDisassembler::Success;
}
+static DecodeStatus DecodeInstSyncBarrierOption(MCInst &Inst, unsigned Val,
+ uint64_t Address, const void *Decoder) {
+ if (Val & ~0xf)
+ return MCDisassembler::Fail;
+
+ Inst.addOperand(MCOperand::CreateImm(Val));
+ return MCDisassembler::Success;
+}
+
static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
if (!Val) return MCDisassembler::Fail;
unsigned Rn = fieldFromInstruction(Insn, 16, 4);
unsigned pred = fieldFromInstruction(Insn, 28, 4);
- if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
+ if (Rn == 0xF)
+ S = MCDisassembler::SoftFail;
- if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
- return MCDisassembler::Fail;
- if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
+ if (!Check(S, DecodeGPRPairRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler::Fail;
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler::Fail;
return S;
}
-
static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder){
DecodeStatus S = MCDisassembler::Success;
unsigned Rn = fieldFromInstruction(Insn, 16, 4);
unsigned pred = fieldFromInstruction(Insn, 28, 4);
- if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
+ if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler::Fail;
- if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
- if (Rd == Rn || Rd == Rt || Rd == Rt+1) return MCDisassembler::Fail;
+ if (Rn == 0xF || Rd == Rn || Rd == Rt || Rd == Rt+1)
+ S = MCDisassembler::SoftFail;
- if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
- return MCDisassembler::Fail;
- if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
+ if (!Check(S, DecodeGPRPairRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler::Fail;
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler::Fail;
S = MCDisassembler::SoftFail;
}
- if (mask == 0x0) {
- mask |= 0x8;
- S = MCDisassembler::SoftFail;
- }
+ if (mask == 0x0)
+ return MCDisassembler::Fail;
Inst.addOperand(MCOperand::CreateImm(pred));
Inst.addOperand(MCOperand::CreateImm(mask));
Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
unsigned imm = fieldFromInstruction(Insn, 16, 6);
unsigned cmode = fieldFromInstruction(Insn, 8, 4);
+ unsigned op = fieldFromInstruction(Insn, 5, 1);
DecodeStatus S = MCDisassembler::Success;
// VMOVv2f32 is ambiguous with these decodings.
if (!(imm & 0x38) && cmode == 0xF) {
+ if (op == 1) return MCDisassembler::Fail;
Inst.setOpcode(ARM::VMOVv2f32);
return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
}
- if (!(imm & 0x20)) Check(S, MCDisassembler::SoftFail);
+ if (!(imm & 0x20)) return MCDisassembler::Fail;
if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
return MCDisassembler::Fail;
Vm |= (fieldFromInstruction(Insn, 5, 1) << 4);
unsigned imm = fieldFromInstruction(Insn, 16, 6);
unsigned cmode = fieldFromInstruction(Insn, 8, 4);
+ unsigned op = fieldFromInstruction(Insn, 5, 1);
DecodeStatus S = MCDisassembler::Success;
// VMOVv4f32 is ambiguous with these decodings.
if (!(imm & 0x38) && cmode == 0xF) {
+ if (op == 1) return MCDisassembler::Fail;
Inst.setOpcode(ARM::VMOVv4f32);
return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
}
- if (!(imm & 0x20)) Check(S, MCDisassembler::SoftFail);
+ if (!(imm & 0x20)) return MCDisassembler::Fail;
if (!Check(S, DecodeQPRRegisterClass(Inst, Vd, Address, Decoder)))
return MCDisassembler::Fail;
return S;
}
+static DecodeStatus DecodeImm0_4(MCInst &Inst, unsigned Insn, uint64_t Address,
+ const void *Decoder)
+{
+ unsigned Imm = fieldFromInstruction(Insn, 0, 3);
+ if (Imm > 4) return MCDisassembler::Fail;
+ Inst.addOperand(MCOperand::CreateImm(Imm));
+ return MCDisassembler::Success;
+}
+
static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
projects / oota-llvm.git / blobdiff