//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "arm-disassembler"
-
-#include "ARM.h"
-#include "ARMSubtarget.h"
+#include "llvm/MC/MCDisassembler.h"
#include "MCTargetDesc/ARMAddressingModes.h"
-#include "MCTargetDesc/ARMMCExpr.h"
#include "MCTargetDesc/ARMBaseInfo.h"
-#include "llvm/MC/EDInstInfo.h"
+#include "MCTargetDesc/ARMMCExpr.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCFixedLenDisassembler.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstrDesc.h"
-#include "llvm/MC/MCExpr.h"
-#include "llvm/MC/MCContext.h"
-#include "llvm/MC/MCDisassembler.h"
+#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/Support/Debug.h"
-#include "llvm/Support/MemoryObject.h"
#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/LEB128.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/raw_ostream.h"
+#include <vector>
using namespace llvm;
+#define DEBUG_TYPE "arm-disassembler"
+
typedef MCDisassembler::DecodeStatus DecodeStatus;
namespace {
-/// ARMDisassembler - ARM disassembler for all ARM platforms.
+ // Handles the condition code status of instructions in IT blocks
+ class ITStatus
+ {
+ public:
+ // Returns the condition code for instruction in IT block
+ unsigned getITCC() {
+ unsigned CC = ARMCC::AL;
+ if (instrInITBlock())
+ CC = ITStates.back();
+ return CC;
+ }
+
+ // Advances the IT block state to the next T or E
+ void advanceITState() {
+ ITStates.pop_back();
+ }
+
+ // Returns true if the current instruction is in an IT block
+ bool instrInITBlock() {
+ return !ITStates.empty();
+ }
+
+ // Returns true if current instruction is the last instruction in an IT block
+ bool instrLastInITBlock() {
+ return ITStates.size() == 1;
+ }
+
+ // Called when decoding an IT instruction. Sets the IT state for the following
+ // instructions that for the IT block. Firstcond and Mask correspond to the
+ // fields in the IT instruction encoding.
+ 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<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
+ for (unsigned Pos = NumTZ+1; Pos <= 3; ++Pos) {
+ bool T = ((Mask >> Pos) & 1) == CondBit0;
+ if (T)
+ ITStates.push_back(CCBits);
+ else
+ ITStates.push_back(CCBits ^ 1);
+ }
+ ITStates.push_back(CCBits);
+ }
+
+ private:
+ std::vector<unsigned char> ITStates;
+ };
+}
+
+namespace {
+/// ARM disassembler for all ARM platforms.
class ARMDisassembler : public MCDisassembler {
public:
- /// Constructor - Initializes the disassembler.
- ///
- ARMDisassembler(const MCSubtargetInfo &STI) :
- MCDisassembler(STI) {
- }
-
- ~ARMDisassembler() {
+ ARMDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx) :
+ MCDisassembler(STI, Ctx) {
}
- /// getInstruction - See MCDisassembler.
- DecodeStatus getInstruction(MCInst &instr,
- uint64_t &size,
- const MemoryObject ®ion,
- uint64_t address,
- raw_ostream &vStream,
- raw_ostream &cStream) const;
+ ~ARMDisassembler() override {}
- /// getEDInfo - See MCDisassembler.
- const EDInstInfo *getEDInfo() const;
-private:
+ DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size,
+ ArrayRef<uint8_t> Bytes, uint64_t Address,
+ raw_ostream &VStream,
+ raw_ostream &CStream) const override;
};
-/// ThumbDisassembler - Thumb disassembler for all Thumb platforms.
+/// Thumb disassembler for all Thumb platforms.
class ThumbDisassembler : public MCDisassembler {
public:
- /// Constructor - Initializes the disassembler.
- ///
- ThumbDisassembler(const MCSubtargetInfo &STI) :
- MCDisassembler(STI) {
+ ThumbDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx) :
+ MCDisassembler(STI, Ctx) {
}
- ~ThumbDisassembler() {
- }
+ ~ThumbDisassembler() override {}
- /// getInstruction - See MCDisassembler.
- DecodeStatus getInstruction(MCInst &instr,
- uint64_t &size,
- const MemoryObject ®ion,
- uint64_t address,
- raw_ostream &vStream,
- raw_ostream &cStream) const;
+ DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size,
+ ArrayRef<uint8_t> Bytes, uint64_t Address,
+ raw_ostream &VStream,
+ raw_ostream &CStream) const override;
- /// getEDInfo - See MCDisassembler.
- const EDInstInfo *getEDInfo() const;
private:
- mutable std::vector<unsigned> ITBlock;
+ mutable ITStatus ITBlock;
DecodeStatus AddThumbPredicate(MCInst&) const;
void UpdateThumbVFPPredicate(MCInst&) const;
};
// Forward declare these because the autogenerated code will reference them.
// Definitions are further down.
-static DecodeStatus DecodeGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
+static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeGPRnopcRegisterClass(llvm::MCInst &Inst,
+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(llvm::MCInst &Inst, unsigned RegNo,
+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 DecodetcGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
+static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecoderGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
+static DecodeStatus DecodeGPRPairRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeSPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
+static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeDPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
+static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeDPR_8RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
+static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeDPR_VFP2RegisterClass(llvm::MCInst &Inst,
+static DecodeStatus DecodeDPR_VFP2RegisterClass(MCInst &Inst,
unsigned RegNo,
uint64_t Address,
const void *Decoder);
-static DecodeStatus DecodeQPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
+static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeDPairRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
+static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeDPairSpacedRegisterClass(llvm::MCInst &Inst,
+static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
unsigned RegNo, uint64_t Address,
const void *Decoder);
-static DecodeStatus DecodePredicateOperand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeCCOutOperand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeSOImmOperand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeRegListOperand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeSPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
- uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeDPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeBitfieldMaskOperand(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeCopMemInstruction(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeAddrMode2IdxInstruction(llvm::MCInst &Inst,
+static DecodeStatus DecodeAddrMode2IdxInstruction(MCInst &Inst,
unsigned Insn,
uint64_t Address,
const void *Decoder);
-static DecodeStatus DecodeSORegMemOperand(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeAddrMode3Instruction(llvm::MCInst &Inst,unsigned Insn,
+static DecodeStatus DecodeAddrMode3Instruction(MCInst &Inst,unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeSORegImmOperand(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeSORegRegOperand(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeMemMultipleWritebackInstruction(llvm::MCInst & Inst,
+static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst & Inst,
unsigned Insn,
uint64_t Adddress,
const void *Decoder);
-static DecodeStatus DecodeT2MOVTWInstruction(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder);
+static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder);
+static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder);
+static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder);
+static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder);
+static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
+ uint64_t Address, const void *Decoder);
+static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
+ uint64_t Address, const void *Decoder);
+static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeArmMOVTWInstruction(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeSMLAInstruction(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeBranchImmInstruction(MCInst &Inst,unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeCPSInstruction(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeT2CPSInstruction(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVLDST1Instruction(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeAddrModeImm12Operand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeVLDST2Instruction(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeAddrMode5Operand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeVLDST3Instruction(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeAddrMode7Operand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeVLDST4Instruction(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeBranchImmInstruction(llvm::MCInst &Inst,unsigned Insn,
+static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeAddrMode6Operand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeVLDInstruction(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeVSTInstruction(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeVLD1DupInstruction(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeVLD2DupInstruction(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeVLD3DupInstruction(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeNEONModImmInstruction(MCInst &Inst,unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeVLD4DupInstruction(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeNEONModImmInstruction(llvm::MCInst &Inst,unsigned Val,
+static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeVSHLMaxInstruction(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeShiftRight8Imm(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeShiftRight16Imm(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeShiftRight32Imm(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeShiftRight64Imm(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeTBLInstruction(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodePostIdxReg(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeCoprocessor(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeInstSyncBarrierOption(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeMSRMask(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeBankedReg(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeDoubleRegLoad(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeDoubleRegStore(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeLDRPreImm(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeLDRPreReg(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeSTRPreImm(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeSTRPreReg(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeVLD1LN(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeVLD2LN(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeVLD3LN(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeVLD4LN(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeVST1LN(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeVST2LN(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeVST3LN(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeVST4LN(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeVMOVSRR(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeVMOVRRS(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeSwap(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeVCVTD(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeVCVTQ(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn,
+static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeThumbBROperand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeT2BROperand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeThumbCmpBROperand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeThumbAddrModeRR(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeThumbAddrModeIS(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeThumbAddrModePC(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeThumbAddrModeSP(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeT2AddrModeSOReg(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeT2LoadShift(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeT2Imm8S4(llvm::MCInst &Inst, unsigned Val,
+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(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeT2AddrModeImm0_1020s4(llvm::MCInst &Inst,unsigned Val,
+static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Val,
+static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn,
+static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn,
+static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeQADDInstruction(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeThumbTableBranch(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeThumbTableBranch(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeThumbBCCTargetOperand(llvm::MCInst &Inst,unsigned Val,
+static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeThumbBCCTargetOperand(MCInst &Inst,unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeIT(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeT2LDRDPreInstruction(llvm::MCInst &Inst,unsigned Insn,
+static DecodeStatus DecodeIT(MCInst &Inst, unsigned Val,
+ uint64_t Address, const void *Decoder);
+static DecodeStatus DecodeT2LDRDPreInstruction(MCInst &Inst,unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeT2STRDPreInstruction(llvm::MCInst &Inst,unsigned Insn,
+static DecodeStatus DecodeT2STRDPreInstruction(MCInst &Inst,unsigned Insn,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeT2Adr(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeT2Adr(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeT2LdStPre(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-static DecodeStatus DecodeT2ShifterImmOperand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder);
-
-
+static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
+ uint64_t Address, const void *Decoder);
+static DecodeStatus DecodeMRRC2(llvm::MCInst &Inst, unsigned Val,
+ uint64_t Address, const void *Decoder);
#include "ARMGenDisassemblerTables.inc"
-#include "ARMGenInstrInfo.inc"
-#include "ARMGenEDInfo.inc"
-
-static MCDisassembler *createARMDisassembler(const Target &T, const MCSubtargetInfo &STI) {
- return new ARMDisassembler(STI);
-}
-static MCDisassembler *createThumbDisassembler(const Target &T, const MCSubtargetInfo &STI) {
- return new ThumbDisassembler(STI);
+static MCDisassembler *createARMDisassembler(const Target &T,
+ const MCSubtargetInfo &STI,
+ MCContext &Ctx) {
+ return new ARMDisassembler(STI, Ctx);
}
-const EDInstInfo *ARMDisassembler::getEDInfo() const {
- return instInfoARM;
+static MCDisassembler *createThumbDisassembler(const Target &T,
+ const MCSubtargetInfo &STI,
+ MCContext &Ctx) {
+ return new ThumbDisassembler(STI, Ctx);
}
-const EDInstInfo *ThumbDisassembler::getEDInfo() const {
- return instInfoARM;
+// Post-decoding checks
+static DecodeStatus checkDecodedInstruction(MCInst &MI, uint64_t &Size,
+ uint64_t Address, raw_ostream &OS,
+ raw_ostream &CS,
+ uint32_t Insn,
+ DecodeStatus Result)
+{
+ switch (MI.getOpcode()) {
+ case ARM::HVC: {
+ // HVC is undefined if condition = 0xf otherwise upredictable
+ // if condition != 0xe
+ uint32_t Cond = (Insn >> 28) & 0xF;
+ if (Cond == 0xF)
+ return MCDisassembler::Fail;
+ if (Cond != 0xE)
+ return MCDisassembler::SoftFail;
+ return Result;
+ }
+ default: return Result;
+ }
}
DecodeStatus ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
- const MemoryObject &Region,
- uint64_t Address,
- raw_ostream &os,
- raw_ostream &cs) const {
- CommentStream = &cs;
-
- uint8_t bytes[4];
+ ArrayRef<uint8_t> Bytes,
+ uint64_t Address, raw_ostream &OS,
+ raw_ostream &CS) const {
+ CommentStream = &CS;
assert(!(STI.getFeatureBits() & ARM::ModeThumb) &&
- "Asked to disassemble an ARM instruction but Subtarget is in Thumb mode!");
+ "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 (Bytes.size() < 4) {
Size = 0;
return MCDisassembler::Fail;
}
// Encoded as a small-endian 32-bit word in the stream.
- uint32_t insn = (bytes[3] << 24) |
- (bytes[2] << 16) |
- (bytes[1] << 8) |
- (bytes[0] << 0);
+ uint32_t Insn =
+ (Bytes[3] << 24) | (Bytes[2] << 16) | (Bytes[1] << 8) | (Bytes[0] << 0);
// Calling the auto-generated decoder function.
- DecodeStatus result = decodeARMInstruction32(MI, insn, Address, this, STI);
- if (result != MCDisassembler::Fail) {
+ DecodeStatus Result =
+ decodeInstruction(DecoderTableARM32, MI, Insn, Address, this, STI);
+ if (Result != MCDisassembler::Fail) {
Size = 4;
- return result;
+ return checkDecodedInstruction(MI, Size, Address, OS, CS, Insn, Result);
}
// VFP and NEON instructions, similarly, are shared between ARM
// and Thumb modes.
MI.clear();
- result = decodeVFPInstruction32(MI, insn, Address, this, STI);
- if (result != MCDisassembler::Fail) {
+ Result = decodeInstruction(DecoderTableVFP32, MI, Insn, Address, this, STI);
+ if (Result != MCDisassembler::Fail) {
+ Size = 4;
+ return Result;
+ }
+
+ MI.clear();
+ Result = decodeInstruction(DecoderTableVFPV832, MI, Insn, Address, this, STI);
+ if (Result != MCDisassembler::Fail) {
Size = 4;
- return result;
+ return Result;
}
MI.clear();
- result = decodeNEONDataInstruction32(MI, insn, Address, this, STI);
- if (result != MCDisassembler::Fail) {
+ Result =
+ decodeInstruction(DecoderTableNEONData32, MI, Insn, Address, this, STI);
+ if (Result != MCDisassembler::Fail) {
Size = 4;
// Add a fake predicate operand, because we share these instruction
// definitions with Thumb2 where these instructions are predicable.
if (!DecodePredicateOperand(MI, 0xE, Address, this))
return MCDisassembler::Fail;
- return result;
+ return Result;
}
MI.clear();
- result = decodeNEONLoadStoreInstruction32(MI, insn, Address, this, STI);
- if (result != MCDisassembler::Fail) {
+ Result = decodeInstruction(DecoderTableNEONLoadStore32, MI, Insn, Address,
+ this, STI);
+ if (Result != MCDisassembler::Fail) {
Size = 4;
// Add a fake predicate operand, because we share these instruction
// definitions with Thumb2 where these instructions are predicable.
if (!DecodePredicateOperand(MI, 0xE, Address, this))
return MCDisassembler::Fail;
- return result;
+ return Result;
}
MI.clear();
- result = decodeNEONDupInstruction32(MI, insn, Address, this, STI);
- if (result != MCDisassembler::Fail) {
+ Result =
+ decodeInstruction(DecoderTableNEONDup32, MI, Insn, Address, this, STI);
+ if (Result != MCDisassembler::Fail) {
Size = 4;
// Add a fake predicate operand, because we share these instruction
// definitions with Thumb2 where these instructions are predicable.
if (!DecodePredicateOperand(MI, 0xE, Address, this))
return MCDisassembler::Fail;
- return result;
+ return Result;
}
MI.clear();
+ Result =
+ decodeInstruction(DecoderTablev8NEON32, MI, Insn, Address, this, STI);
+ if (Result != MCDisassembler::Fail) {
+ Size = 4;
+ return Result;
+ }
+
+ MI.clear();
+ Result =
+ decodeInstruction(DecoderTablev8Crypto32, MI, Insn, Address, this, STI);
+ if (Result != MCDisassembler::Fail) {
+ Size = 4;
+ return Result;
+ }
+ MI.clear();
Size = 0;
return MCDisassembler::Fail;
}
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;
- const char *Name = SymbolLookUp(DisInfo, Value, &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
/// These can often be values in a literal pool near the Address of the
/// instruction. The Address of the instruction and its immediate Value are
/// used as a possible literal pool entry. The SymbolLookUp call back will
-/// return the name of a symbol referenced by the the literal pool's entry if
+/// return the name of a symbol referenced by the literal pool's entry if
/// the referenced address is that of a symbol. Or it will return a pointer to
/// a literal 'C' string if the referenced address of the literal pool's entry
/// is an address into a section with 'C' string literals.
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
case ARM::tSETEND:
// Some instructions (mostly conditional branches) are not
// allowed in IT blocks.
- if (!ITBlock.empty())
+ if (ITBlock.instrInITBlock())
S = SoftFail;
else
return Success;
case ARM::t2TBH:
// Some instructions (mostly unconditional branches) can
// only appears at the end of, or outside of, an IT.
- if (ITBlock.size() > 1)
+ if (ITBlock.instrInITBlock() && !ITBlock.instrLastInITBlock())
S = SoftFail;
break;
default:
// If we're in an IT block, base the predicate on that. Otherwise,
// assume a predicate of AL.
unsigned CC;
- if (!ITBlock.empty()) {
- CC = ITBlock.back();
- if (CC == 0xF)
- CC = ARMCC::AL;
- ITBlock.pop_back();
- } else
+ CC = ITBlock.getITCC();
+ if (CC == 0xF)
CC = ARMCC::AL;
+ if (ITBlock.instrInITBlock())
+ ITBlock.advanceITState();
const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
// context as a post-pass.
void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
unsigned CC;
- if (!ITBlock.empty()) {
- CC = ITBlock.back();
- ITBlock.pop_back();
- } else
- CC = ARMCC::AL;
+ CC = ITBlock.getITCC();
+ if (ITBlock.instrInITBlock())
+ ITBlock.advanceITState();
const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
MCInst::iterator I = MI.begin();
}
DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
- const MemoryObject &Region,
+ ArrayRef<uint8_t> Bytes,
uint64_t Address,
- raw_ostream &os,
- raw_ostream &cs) const {
- CommentStream = &cs;
-
- uint8_t bytes[4];
+ raw_ostream &OS,
+ raw_ostream &CS) const {
+ CommentStream = &CS;
assert((STI.getFeatureBits() & ARM::ModeThumb) &&
"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 (Bytes.size() < 2) {
Size = 0;
return MCDisassembler::Fail;
}
- uint16_t insn16 = (bytes[1] << 8) | bytes[0];
- DecodeStatus result = decodeThumbInstruction16(MI, insn16, Address, this, STI);
- if (result != MCDisassembler::Fail) {
+ uint16_t Insn16 = (Bytes[1] << 8) | Bytes[0];
+ DecodeStatus Result =
+ decodeInstruction(DecoderTableThumb16, MI, Insn16, Address, this, STI);
+ if (Result != MCDisassembler::Fail) {
Size = 2;
- Check(result, AddThumbPredicate(MI));
- return result;
+ Check(Result, AddThumbPredicate(MI));
+ return Result;
}
MI.clear();
- result = decodeThumbSBitInstruction16(MI, insn16, Address, this, STI);
- if (result) {
+ Result = decodeInstruction(DecoderTableThumbSBit16, MI, Insn16, Address, this,
+ STI);
+ if (Result) {
Size = 2;
- bool InITBlock = !ITBlock.empty();
- Check(result, AddThumbPredicate(MI));
+ bool InITBlock = ITBlock.instrInITBlock();
+ Check(Result, AddThumbPredicate(MI));
AddThumb1SBit(MI, InITBlock);
- return result;
+ return Result;
}
MI.clear();
- result = decodeThumb2Instruction16(MI, insn16, Address, this, STI);
- if (result != MCDisassembler::Fail) {
+ Result =
+ decodeInstruction(DecoderTableThumb216, MI, Insn16, Address, this, STI);
+ if (Result != MCDisassembler::Fail) {
Size = 2;
// Nested IT blocks are UNPREDICTABLE. Must be checked before we add
// the Thumb predicate.
- if (MI.getOpcode() == ARM::t2IT && !ITBlock.empty())
- result = MCDisassembler::SoftFail;
+ if (MI.getOpcode() == ARM::t2IT && ITBlock.instrInITBlock())
+ Result = MCDisassembler::SoftFail;
- Check(result, AddThumbPredicate(MI));
+ Check(Result, AddThumbPredicate(MI));
// If we find an IT instruction, we need to parse its condition
// code and mask operands so that we can apply them correctly
// to the subsequent instructions.
if (MI.getOpcode() == ARM::t2IT) {
- // (3 - the number of trailing zeros) is the number of then / else.
- unsigned firstcond = MI.getOperand(0).getImm();
+ unsigned Firstcond = MI.getOperand(0).getImm();
unsigned Mask = MI.getOperand(1).getImm();
- unsigned CondBit0 = Mask >> 4 & 1;
- unsigned NumTZ = CountTrailingZeros_32(Mask);
- assert(NumTZ <= 3 && "Invalid IT mask!");
- for (unsigned Pos = 3, e = NumTZ; Pos > e; --Pos) {
- bool T = ((Mask >> Pos) & 1) == CondBit0;
- if (T)
- ITBlock.insert(ITBlock.begin(), firstcond);
- else
- ITBlock.insert(ITBlock.begin(), firstcond ^ 1);
- }
-
- ITBlock.push_back(firstcond);
+ ITBlock.setITState(Firstcond, Mask);
}
- return result;
+ return Result;
}
// We want to read exactly 4 bytes of data.
- if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
+ if (Bytes.size() < 4) {
Size = 0;
return MCDisassembler::Fail;
}
- uint32_t insn32 = (bytes[3] << 8) |
- (bytes[2] << 0) |
- (bytes[1] << 24) |
- (bytes[0] << 16);
+ uint32_t Insn32 =
+ (Bytes[3] << 8) | (Bytes[2] << 0) | (Bytes[1] << 24) | (Bytes[0] << 16);
MI.clear();
- result = decodeThumbInstruction32(MI, insn32, Address, this, STI);
- if (result != MCDisassembler::Fail) {
+ Result =
+ decodeInstruction(DecoderTableThumb32, MI, Insn32, Address, this, STI);
+ if (Result != MCDisassembler::Fail) {
Size = 4;
- bool InITBlock = ITBlock.size();
- Check(result, AddThumbPredicate(MI));
+ bool InITBlock = ITBlock.instrInITBlock();
+ Check(Result, AddThumbPredicate(MI));
AddThumb1SBit(MI, InITBlock);
- return result;
+ return Result;
}
MI.clear();
- result = decodeThumb2Instruction32(MI, insn32, Address, this, STI);
- if (result != MCDisassembler::Fail) {
+ Result =
+ decodeInstruction(DecoderTableThumb232, MI, Insn32, Address, this, STI);
+ if (Result != MCDisassembler::Fail) {
Size = 4;
- Check(result, AddThumbPredicate(MI));
- return result;
+ Check(Result, AddThumbPredicate(MI));
+ return Result;
}
- MI.clear();
- result = decodeVFPInstruction32(MI, insn32, Address, this, STI);
- if (result != MCDisassembler::Fail) {
- Size = 4;
- UpdateThumbVFPPredicate(MI);
- 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 = decodeNEONDupInstruction32(MI, insn32, Address, this, STI);
- if (result != MCDisassembler::Fail) {
+ Result =
+ decodeInstruction(DecoderTableVFPV832, MI, Insn32, Address, this, STI);
+ if (Result != MCDisassembler::Fail) {
Size = 4;
- Check(result, AddThumbPredicate(MI));
- return result;
+ 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 (fieldFromInstruction32(insn32, 24, 8) == 0xF9) {
+ if (fieldFromInstruction(Insn32, 24, 8) == 0xF9) {
MI.clear();
- uint32_t NEONLdStInsn = insn32;
+ uint32_t NEONLdStInsn = Insn32;
NEONLdStInsn &= 0xF0FFFFFF;
NEONLdStInsn |= 0x04000000;
- result = decodeNEONLoadStoreInstruction32(MI, NEONLdStInsn, Address, this, STI);
- if (result != MCDisassembler::Fail) {
+ Result = decodeInstruction(DecoderTableNEONLoadStore32, MI, NEONLdStInsn,
+ Address, this, STI);
+ if (Result != MCDisassembler::Fail) {
Size = 4;
- Check(result, AddThumbPredicate(MI));
- return result;
+ Check(Result, AddThumbPredicate(MI));
+ return Result;
}
}
- if (fieldFromInstruction32(insn32, 24, 4) == 0xF) {
+ if (fieldFromInstruction(Insn32, 24, 4) == 0xF) {
MI.clear();
- uint32_t NEONDataInsn = insn32;
+ uint32_t NEONDataInsn = Insn32;
NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
NEONDataInsn |= 0x12000000; // Set bits 28 and 25
- result = decodeNEONDataInstruction32(MI, NEONDataInsn, Address, this, STI);
- if (result != MCDisassembler::Fail) {
+ Result = decodeInstruction(DecoderTableNEONData32, MI, NEONDataInsn,
+ Address, this, STI);
+ if (Result != MCDisassembler::Fail) {
+ Size = 4;
+ Check(Result, AddThumbPredicate(MI));
+ return Result;
+ }
+
+ MI.clear();
+ uint32_t NEONCryptoInsn = Insn32;
+ NEONCryptoInsn &= 0xF0FFFFFF; // Clear bits 27-24
+ NEONCryptoInsn |= (NEONCryptoInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
+ NEONCryptoInsn |= 0x12000000; // Set bits 28 and 25
+ Result = decodeInstruction(DecoderTablev8Crypto32, MI, NEONCryptoInsn,
+ Address, this, STI);
+ if (Result != MCDisassembler::Fail) {
+ Size = 4;
+ return Result;
+ }
+
+ MI.clear();
+ uint32_t NEONv8Insn = Insn32;
+ NEONv8Insn &= 0xF3FFFFFF; // Clear bits 27-26
+ Result = decodeInstruction(DecoderTablev8NEON32, MI, NEONv8Insn, Address,
+ this, STI);
+ if (Result != MCDisassembler::Fail) {
Size = 4;
- Check(result, AddThumbPredicate(MI));
- return result;
+ return Result;
}
}
+ MI.clear();
Size = 0;
return MCDisassembler::Fail;
}
extern "C" void LLVMInitializeARMDisassembler() {
- TargetRegistry::RegisterMCDisassembler(TheARMTarget,
+ TargetRegistry::RegisterMCDisassembler(TheARMLETarget,
createARMDisassembler);
- TargetRegistry::RegisterMCDisassembler(TheThumbTarget,
+ TargetRegistry::RegisterMCDisassembler(TheARMBETarget,
+ createARMDisassembler);
+ TargetRegistry::RegisterMCDisassembler(TheThumbLETarget,
+ createThumbDisassembler);
+ TargetRegistry::RegisterMCDisassembler(TheThumbBETarget,
createThumbDisassembler);
}
-static const unsigned GPRDecoderTable[] = {
+static const uint16_t GPRDecoderTable[] = {
ARM::R0, ARM::R1, ARM::R2, ARM::R3,
ARM::R4, ARM::R5, ARM::R6, ARM::R7,
ARM::R8, ARM::R9, ARM::R10, ARM::R11,
ARM::R12, ARM::SP, ARM::LR, ARM::PC
};
-static DecodeStatus DecodeGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
+static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder) {
if (RegNo > 15)
return MCDisassembler::Fail;
}
static DecodeStatus
-DecodeGPRnopcRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
+DecodeGPRnopcRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder) {
- if (RegNo == 15) return MCDisassembler::Fail;
- return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
+ DecodeStatus S = MCDisassembler::Success;
+
+ if (RegNo == 15)
+ S = MCDisassembler::SoftFail;
+
+ Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
+
+ 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(llvm::MCInst &Inst, unsigned RegNo,
+static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder) {
if (RegNo > 7)
return MCDisassembler::Fail;
return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
}
-static DecodeStatus DecodetcGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
+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;
switch (RegNo) {
return MCDisassembler::Success;
}
-static DecodeStatus DecoderGPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
+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 unsigned SPRDecoderTable[] = {
+static const uint16_t SPRDecoderTable[] = {
ARM::S0, ARM::S1, ARM::S2, ARM::S3,
ARM::S4, ARM::S5, ARM::S6, ARM::S7,
ARM::S8, ARM::S9, ARM::S10, ARM::S11,
ARM::S28, ARM::S29, ARM::S30, ARM::S31
};
-static DecodeStatus DecodeSPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
+static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder) {
if (RegNo > 31)
return MCDisassembler::Fail;
return MCDisassembler::Success;
}
-static const unsigned DPRDecoderTable[] = {
+static const uint16_t DPRDecoderTable[] = {
ARM::D0, ARM::D1, ARM::D2, ARM::D3,
ARM::D4, ARM::D5, ARM::D6, ARM::D7,
ARM::D8, ARM::D9, ARM::D10, ARM::D11,
ARM::D28, ARM::D29, ARM::D30, ARM::D31
};
-static DecodeStatus DecodeDPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
+static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder) {
- if (RegNo > 31)
+ uint64_t featureBits = ((const MCDisassembler*)Decoder)->getSubtargetInfo()
+ .getFeatureBits();
+ bool hasD16 = featureBits & ARM::FeatureD16;
+
+ if (RegNo > 31 || (hasD16 && RegNo > 15))
return MCDisassembler::Fail;
unsigned Register = DPRDecoderTable[RegNo];
return MCDisassembler::Success;
}
-static DecodeStatus DecodeDPR_8RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
+static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder) {
if (RegNo > 7)
return MCDisassembler::Fail;
}
static DecodeStatus
-DecodeDPR_VFP2RegisterClass(llvm::MCInst &Inst, unsigned RegNo,
+DecodeDPR_VFP2RegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder) {
if (RegNo > 15)
return MCDisassembler::Fail;
return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
}
-static const unsigned QPRDecoderTable[] = {
+static const uint16_t QPRDecoderTable[] = {
ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7,
ARM::Q8, ARM::Q9, ARM::Q10, ARM::Q11,
};
-static DecodeStatus DecodeQPRRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
+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;
return MCDisassembler::Success;
}
-static const unsigned DPairDecoderTable[] = {
+static const uint16_t DPairDecoderTable[] = {
ARM::Q0, ARM::D1_D2, ARM::Q1, ARM::D3_D4, ARM::Q2, ARM::D5_D6,
ARM::Q3, ARM::D7_D8, ARM::Q4, ARM::D9_D10, ARM::Q5, ARM::D11_D12,
ARM::Q6, ARM::D13_D14, ARM::Q7, ARM::D15_D16, ARM::Q8, ARM::D17_D18,
ARM::Q15
};
-static DecodeStatus DecodeDPairRegisterClass(llvm::MCInst &Inst, unsigned RegNo,
+static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder) {
if (RegNo > 30)
return MCDisassembler::Fail;
return MCDisassembler::Success;
}
-static const unsigned DPairSpacedDecoderTable[] = {
+static const uint16_t DPairSpacedDecoderTable[] = {
ARM::D0_D2, ARM::D1_D3, ARM::D2_D4, ARM::D3_D5,
ARM::D4_D6, ARM::D5_D7, ARM::D6_D8, ARM::D7_D9,
ARM::D8_D10, ARM::D9_D11, ARM::D10_D12, ARM::D11_D13,
ARM::D28_D30, ARM::D29_D31
};
-static DecodeStatus DecodeDPairSpacedRegisterClass(llvm::MCInst &Inst,
+static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
unsigned RegNo,
uint64_t Address,
const void *Decoder) {
return MCDisassembler::Success;
}
-static DecodeStatus DecodePredicateOperand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
if (Val == 0xF) return MCDisassembler::Fail;
// AL predicate is not allowed on Thumb1 branches.
return MCDisassembler::Success;
}
-static DecodeStatus DecodeCCOutOperand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
if (Val)
Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
return MCDisassembler::Success;
}
-static DecodeStatus DecodeSOImmOperand(llvm::MCInst &Inst, unsigned Val,
- uint64_t Address, const void *Decoder) {
- uint32_t imm = Val & 0xFF;
- uint32_t rot = (Val & 0xF00) >> 7;
- uint32_t rot_imm = (imm >> rot) | (imm << ((32-rot) & 0x1F));
- Inst.addOperand(MCOperand::CreateImm(rot_imm));
- return MCDisassembler::Success;
-}
-
-static DecodeStatus DecodeSORegImmOperand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rm = fieldFromInstruction32(Val, 0, 4);
- unsigned type = fieldFromInstruction32(Val, 5, 2);
- unsigned imm = fieldFromInstruction32(Val, 7, 5);
+ unsigned Rm = fieldFromInstruction(Val, 0, 4);
+ unsigned type = fieldFromInstruction(Val, 5, 2);
+ unsigned imm = fieldFromInstruction(Val, 7, 5);
// Register-immediate
if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
return S;
}
-static DecodeStatus DecodeSORegRegOperand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rm = fieldFromInstruction32(Val, 0, 4);
- unsigned type = fieldFromInstruction32(Val, 5, 2);
- unsigned Rs = fieldFromInstruction32(Val, 8, 4);
+ unsigned Rm = fieldFromInstruction(Val, 0, 4);
+ unsigned type = fieldFromInstruction(Val, 5, 2);
+ unsigned Rs = fieldFromInstruction(Val, 8, 4);
// Register-register
if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
return S;
}
-static DecodeStatus DecodeRegListOperand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- bool writebackLoad = false;
- unsigned writebackReg = 0;
+ bool NeedDisjointWriteback = false;
+ unsigned WritebackReg = 0;
switch (Inst.getOpcode()) {
- default:
- break;
- case ARM::LDMIA_UPD:
- case ARM::LDMDB_UPD:
- case ARM::LDMIB_UPD:
- case ARM::LDMDA_UPD:
- case ARM::t2LDMIA_UPD:
- case ARM::t2LDMDB_UPD:
- writebackLoad = true;
- writebackReg = Inst.getOperand(0).getReg();
- break;
+ default:
+ break;
+ case ARM::LDMIA_UPD:
+ case ARM::LDMDB_UPD:
+ case ARM::LDMIB_UPD:
+ case ARM::LDMDA_UPD:
+ case ARM::t2LDMIA_UPD:
+ case ARM::t2LDMDB_UPD:
+ case ARM::t2STMIA_UPD:
+ case ARM::t2STMDB_UPD:
+ NeedDisjointWriteback = true;
+ WritebackReg = Inst.getOperand(0).getReg();
+ break;
}
// 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)))
return MCDisassembler::Fail;
// Writeback not allowed if Rn is in the target list.
- if (writebackLoad && writebackReg == Inst.end()[-1].getReg())
+ if (NeedDisjointWriteback && WritebackReg == Inst.end()[-1].getReg())
Check(S, MCDisassembler::SoftFail);
}
}
return S;
}
-static DecodeStatus DecodeSPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Vd = fieldFromInstruction32(Val, 8, 4);
- unsigned regs = Val & 0xFF;
+ 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;
return S;
}
-static DecodeStatus DecodeDPRRegListOperand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Vd = fieldFromInstruction32(Val, 8, 4);
- unsigned regs = (Val & 0xFF) / 2;
+ unsigned Vd = fieldFromInstruction(Val, 8, 5);
+ unsigned regs = fieldFromInstruction(Val, 1, 7);
+
+ // 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 DecodeBitfieldMaskOperand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
// This operand encodes a mask of contiguous zeros between a specified MSB
// and LSB. To decode it, we create the mask of all bits MSB-and-lower,
// the mask of all bits LSB-and-lower, and then xor them to create
// the mask of that's all ones on [msb, lsb]. Finally we not it to
// create the final mask.
- unsigned msb = fieldFromInstruction32(Val, 5, 5);
- unsigned lsb = fieldFromInstruction32(Val, 0, 5);
+ unsigned msb = fieldFromInstruction(Val, 5, 5);
+ unsigned lsb = fieldFromInstruction(Val, 0, 5);
DecodeStatus S = MCDisassembler::Success;
- if (lsb > msb) Check(S, MCDisassembler::SoftFail);
+ if (lsb > msb) {
+ Check(S, MCDisassembler::SoftFail);
+ // The check above will cause the warning for the "potentially undefined
+ // instruction encoding" but we can't build a bad MCOperand value here
+ // with a lsb > msb or else printing the MCInst will cause a crash.
+ lsb = msb;
+ }
uint32_t msb_mask = 0xFFFFFFFF;
if (msb != 31) msb_mask = (1U << (msb+1)) - 1;
return S;
}
-static DecodeStatus DecodeCopMemInstruction(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned pred = fieldFromInstruction32(Insn, 28, 4);
- unsigned CRd = fieldFromInstruction32(Insn, 12, 4);
- unsigned coproc = fieldFromInstruction32(Insn, 8, 4);
- unsigned imm = fieldFromInstruction32(Insn, 0, 8);
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned U = fieldFromInstruction32(Insn, 23, 1);
+ unsigned pred = fieldFromInstruction(Insn, 28, 4);
+ unsigned CRd = fieldFromInstruction(Insn, 12, 4);
+ unsigned coproc = fieldFromInstruction(Insn, 8, 4);
+ unsigned imm = fieldFromInstruction(Insn, 0, 8);
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned U = fieldFromInstruction(Insn, 23, 1);
switch (Inst.getOpcode()) {
case ARM::LDC_OFFSET:
break;
}
+ uint64_t featureBits = ((const MCDisassembler*)Decoder)->getSubtargetInfo()
+ .getFeatureBits();
+ if ((featureBits & ARM::HasV8Ops) && (coproc != 14))
+ return MCDisassembler::Fail;
+
Inst.addOperand(MCOperand::CreateImm(coproc));
Inst.addOperand(MCOperand::CreateImm(CRd));
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
}
static DecodeStatus
-DecodeAddrMode2IdxInstruction(llvm::MCInst &Inst, unsigned Insn,
+DecodeAddrMode2IdxInstruction(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
- unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
- unsigned imm = fieldFromInstruction32(Insn, 0, 12);
- unsigned pred = fieldFromInstruction32(Insn, 28, 4);
- unsigned reg = fieldFromInstruction32(Insn, 25, 1);
- unsigned P = fieldFromInstruction32(Insn, 24, 1);
- unsigned W = fieldFromInstruction32(Insn, 21, 1);
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned Rt = fieldFromInstruction(Insn, 12, 4);
+ unsigned Rm = fieldFromInstruction(Insn, 0, 4);
+ unsigned imm = fieldFromInstruction(Insn, 0, 12);
+ unsigned pred = fieldFromInstruction(Insn, 28, 4);
+ unsigned reg = fieldFromInstruction(Insn, 25, 1);
+ unsigned P = fieldFromInstruction(Insn, 24, 1);
+ unsigned W = fieldFromInstruction(Insn, 21, 1);
// On stores, the writeback operand precedes Rt.
switch (Inst.getOpcode()) {
return MCDisassembler::Fail;
ARM_AM::AddrOpc Op = ARM_AM::add;
- if (!fieldFromInstruction32(Insn, 23, 1))
+ if (!fieldFromInstruction(Insn, 23, 1))
Op = ARM_AM::sub;
bool writeback = (P == 0) || (W == 1);
if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler::Fail;
ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
- switch( fieldFromInstruction32(Insn, 5, 2)) {
+ switch( fieldFromInstruction(Insn, 5, 2)) {
case 0:
Opc = ARM_AM::lsl;
break;
default:
return MCDisassembler::Fail;
}
- unsigned amt = fieldFromInstruction32(Insn, 7, 5);
+ unsigned amt = fieldFromInstruction(Insn, 7, 5);
+ if (Opc == ARM_AM::ror && amt == 0)
+ Opc = ARM_AM::rrx;
unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
Inst.addOperand(MCOperand::CreateImm(imm));
return S;
}
-static DecodeStatus DecodeSORegMemOperand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rn = fieldFromInstruction32(Val, 13, 4);
- unsigned Rm = fieldFromInstruction32(Val, 0, 4);
- unsigned type = fieldFromInstruction32(Val, 5, 2);
- unsigned imm = fieldFromInstruction32(Val, 7, 5);
- unsigned U = fieldFromInstruction32(Val, 12, 1);
+ unsigned Rn = fieldFromInstruction(Val, 13, 4);
+ unsigned Rm = fieldFromInstruction(Val, 0, 4);
+ unsigned type = fieldFromInstruction(Val, 5, 2);
+ unsigned imm = fieldFromInstruction(Val, 7, 5);
+ unsigned U = fieldFromInstruction(Val, 12, 1);
ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
switch (type) {
break;
}
+ if (ShOp == ARM_AM::ror && imm == 0)
+ ShOp = ARM_AM::rrx;
+
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler::Fail;
if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
}
static DecodeStatus
-DecodeAddrMode3Instruction(llvm::MCInst &Inst, unsigned Insn,
+DecodeAddrMode3Instruction(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
- unsigned type = fieldFromInstruction32(Insn, 22, 1);
- unsigned imm = fieldFromInstruction32(Insn, 8, 4);
- unsigned U = ((~fieldFromInstruction32(Insn, 23, 1)) & 1) << 8;
- unsigned pred = fieldFromInstruction32(Insn, 28, 4);
- unsigned W = fieldFromInstruction32(Insn, 21, 1);
- unsigned P = fieldFromInstruction32(Insn, 24, 1);
+ unsigned Rt = fieldFromInstruction(Insn, 12, 4);
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned Rm = fieldFromInstruction(Insn, 0, 4);
+ unsigned type = fieldFromInstruction(Insn, 22, 1);
+ unsigned imm = fieldFromInstruction(Insn, 8, 4);
+ unsigned U = ((~fieldFromInstruction(Insn, 23, 1)) & 1) << 8;
+ unsigned pred = fieldFromInstruction(Insn, 28, 4);
+ unsigned W = fieldFromInstruction(Insn, 21, 1);
+ unsigned P = fieldFromInstruction(Insn, 24, 1);
+ unsigned Rt2 = Rt + 1;
bool writeback = (W == 1) | (P == 0);
case ARM::LDRD:
case ARM::LDRD_PRE:
case ARM::LDRD_POST:
- if (Rt & 0x1) return MCDisassembler::Fail;
+ if (Rt & 0x1) S = MCDisassembler::SoftFail;
+ break;
+ default:
+ break;
+ }
+ switch (Inst.getOpcode()) {
+ case ARM::STRD:
+ case ARM::STRD_PRE:
+ case ARM::STRD_POST:
+ if (P == 0 && W == 1)
+ S = MCDisassembler::SoftFail;
+
+ if (writeback && (Rn == 15 || Rn == Rt || Rn == Rt2))
+ S = MCDisassembler::SoftFail;
+ if (type && Rm == 15)
+ S = MCDisassembler::SoftFail;
+ if (Rt2 == 15)
+ S = MCDisassembler::SoftFail;
+ if (!type && fieldFromInstruction(Insn, 8, 4))
+ S = MCDisassembler::SoftFail;
+ break;
+ case ARM::STRH:
+ case ARM::STRH_PRE:
+ case ARM::STRH_POST:
+ if (Rt == 15)
+ S = MCDisassembler::SoftFail;
+ if (writeback && (Rn == 15 || Rn == Rt))
+ S = MCDisassembler::SoftFail;
+ if (!type && Rm == 15)
+ S = MCDisassembler::SoftFail;
+ break;
+ case ARM::LDRD:
+ case ARM::LDRD_PRE:
+ case ARM::LDRD_POST:
+ if (type && Rn == 15){
+ if (Rt2 == 15)
+ S = MCDisassembler::SoftFail;
+ break;
+ }
+ if (P == 0 && W == 1)
+ S = MCDisassembler::SoftFail;
+ if (!type && (Rt2 == 15 || Rm == 15 || Rm == Rt || Rm == Rt2))
+ S = MCDisassembler::SoftFail;
+ if (!type && writeback && Rn == 15)
+ S = MCDisassembler::SoftFail;
+ if (writeback && (Rn == Rt || Rn == Rt2))
+ S = MCDisassembler::SoftFail;
+ break;
+ case ARM::LDRH:
+ case ARM::LDRH_PRE:
+ case ARM::LDRH_POST:
+ if (type && Rn == 15){
+ if (Rt == 15)
+ S = MCDisassembler::SoftFail;
+ break;
+ }
+ if (Rt == 15)
+ S = MCDisassembler::SoftFail;
+ if (!type && Rm == 15)
+ S = MCDisassembler::SoftFail;
+ if (!type && writeback && (Rn == 15 || Rn == Rt))
+ S = MCDisassembler::SoftFail;
+ break;
+ case ARM::LDRSH:
+ case ARM::LDRSH_PRE:
+ case ARM::LDRSH_POST:
+ case ARM::LDRSB:
+ case ARM::LDRSB_PRE:
+ case ARM::LDRSB_POST:
+ if (type && Rn == 15){
+ if (Rt == 15)
+ S = MCDisassembler::SoftFail;
+ break;
+ }
+ if (type && (Rt == 15 || (writeback && Rn == Rt)))
+ S = MCDisassembler::SoftFail;
+ if (!type && (Rt == 15 || Rm == 15))
+ S = MCDisassembler::SoftFail;
+ if (!type && writeback && (Rn == 15 || Rn == Rt))
+ S = MCDisassembler::SoftFail;
break;
default:
break;
return S;
}
-static DecodeStatus DecodeRFEInstruction(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeRFEInstruction(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned mode = fieldFromInstruction32(Insn, 23, 2);
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned mode = fieldFromInstruction(Insn, 23, 2);
switch (mode) {
case 0:
return S;
}
-static DecodeStatus DecodeMemMultipleWritebackInstruction(llvm::MCInst &Inst,
+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) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned pred = fieldFromInstruction32(Insn, 28, 4);
- unsigned reglist = fieldFromInstruction32(Insn, 0, 16);
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned pred = fieldFromInstruction(Insn, 28, 4);
+ 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 (fieldFromInstruction32(Insn, 20, 1) == 0) {
+ 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(fieldFromInstruction32(Insn, 0, 4)));
+ MCOperand::CreateImm(fieldFromInstruction(Insn, 0, 4)));
return S;
}
return S;
}
-static DecodeStatus DecodeCPSInstruction(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
- unsigned imod = fieldFromInstruction32(Insn, 18, 2);
- unsigned M = fieldFromInstruction32(Insn, 17, 1);
- unsigned iflags = fieldFromInstruction32(Insn, 6, 3);
- unsigned mode = fieldFromInstruction32(Insn, 0, 5);
+ unsigned imod = fieldFromInstruction(Insn, 18, 2);
+ unsigned M = fieldFromInstruction(Insn, 17, 1);
+ unsigned iflags = fieldFromInstruction(Insn, 6, 3);
+ unsigned mode = fieldFromInstruction(Insn, 0, 5);
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
return S;
}
-static DecodeStatus DecodeT2CPSInstruction(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
- unsigned imod = fieldFromInstruction32(Insn, 9, 2);
- unsigned M = fieldFromInstruction32(Insn, 8, 1);
- unsigned iflags = fieldFromInstruction32(Insn, 5, 3);
- unsigned mode = fieldFromInstruction32(Insn, 0, 5);
+ unsigned imod = fieldFromInstruction(Insn, 9, 2);
+ unsigned M = fieldFromInstruction(Insn, 8, 1);
+ unsigned iflags = fieldFromInstruction(Insn, 5, 3);
+ unsigned mode = fieldFromInstruction(Insn, 0, 5);
DecodeStatus S = MCDisassembler::Success;
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;
}
-static DecodeStatus DecodeT2MOVTWInstruction(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rd = fieldFromInstruction32(Insn, 8, 4);
+ unsigned Rd = fieldFromInstruction(Insn, 8, 4);
unsigned imm = 0;
- imm |= (fieldFromInstruction32(Insn, 0, 8) << 0);
- imm |= (fieldFromInstruction32(Insn, 12, 3) << 8);
- imm |= (fieldFromInstruction32(Insn, 16, 4) << 12);
- imm |= (fieldFromInstruction32(Insn, 26, 1) << 11);
+ imm |= (fieldFromInstruction(Insn, 0, 8) << 0);
+ imm |= (fieldFromInstruction(Insn, 12, 3) << 8);
+ imm |= (fieldFromInstruction(Insn, 16, 4) << 12);
+ imm |= (fieldFromInstruction(Insn, 26, 1) << 11);
if (Inst.getOpcode() == ARM::t2MOVTi16)
if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
return S;
}
-static DecodeStatus DecodeArmMOVTWInstruction(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
- unsigned pred = fieldFromInstruction32(Insn, 28, 4);
+ unsigned Rd = fieldFromInstruction(Insn, 12, 4);
+ unsigned pred = fieldFromInstruction(Insn, 28, 4);
unsigned imm = 0;
- imm |= (fieldFromInstruction32(Insn, 0, 12) << 0);
- imm |= (fieldFromInstruction32(Insn, 16, 4) << 12);
+ imm |= (fieldFromInstruction(Insn, 0, 12) << 0);
+ 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))
return S;
}
-static DecodeStatus DecodeSMLAInstruction(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rd = fieldFromInstruction32(Insn, 16, 4);
- unsigned Rn = fieldFromInstruction32(Insn, 0, 4);
- unsigned Rm = fieldFromInstruction32(Insn, 8, 4);
- unsigned Ra = fieldFromInstruction32(Insn, 12, 4);
- unsigned pred = fieldFromInstruction32(Insn, 28, 4);
+ unsigned Rd = fieldFromInstruction(Insn, 16, 4);
+ unsigned Rn = fieldFromInstruction(Insn, 0, 4);
+ unsigned Rm = fieldFromInstruction(Insn, 8, 4);
+ unsigned Ra = fieldFromInstruction(Insn, 12, 4);
+ unsigned pred = fieldFromInstruction(Insn, 28, 4);
if (pred == 0xF)
return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
return S;
}
-static DecodeStatus DecodeAddrModeImm12Operand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned add = fieldFromInstruction32(Val, 12, 1);
- unsigned imm = fieldFromInstruction32(Val, 0, 12);
- unsigned Rn = fieldFromInstruction32(Val, 13, 4);
+ unsigned add = fieldFromInstruction(Val, 12, 1);
+ unsigned imm = fieldFromInstruction(Val, 0, 12);
+ unsigned Rn = fieldFromInstruction(Val, 13, 4);
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler::Fail;
return S;
}
-static DecodeStatus DecodeAddrMode5Operand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rn = fieldFromInstruction32(Val, 9, 4);
- unsigned U = fieldFromInstruction32(Val, 8, 1);
- unsigned imm = fieldFromInstruction32(Val, 0, 8);
+ unsigned Rn = fieldFromInstruction(Val, 9, 4);
+ unsigned U = fieldFromInstruction(Val, 8, 1);
+ unsigned imm = fieldFromInstruction(Val, 0, 8);
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler::Fail;
return S;
}
-static DecodeStatus DecodeAddrMode7Operand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
}
static DecodeStatus
-DecodeBranchImmInstruction(llvm::MCInst &Inst, unsigned Insn,
+DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder) {
+ DecodeStatus Status = MCDisassembler::Success;
+
+ // Note the J1 and J2 values are from the encoded instruction. So here
+ // change them to I1 and I2 values via as documented:
+ // I1 = NOT(J1 EOR S);
+ // I2 = NOT(J2 EOR S);
+ // and build the imm32 with one trailing zero as documented:
+ // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
+ unsigned S = fieldFromInstruction(Insn, 26, 1);
+ unsigned J1 = fieldFromInstruction(Insn, 13, 1);
+ unsigned J2 = fieldFromInstruction(Insn, 11, 1);
+ unsigned I1 = !(J1 ^ S);
+ unsigned I2 = !(J2 ^ S);
+ 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<25>(tmp << 1);
+ if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
+ true, 4, Inst, Decoder))
+ Inst.addOperand(MCOperand::CreateImm(imm32));
+
+ return Status;
+}
+
+static DecodeStatus
+DecodeBranchImmInstruction(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned pred = fieldFromInstruction32(Insn, 28, 4);
- unsigned imm = fieldFromInstruction32(Insn, 0, 24) << 2;
+ unsigned pred = fieldFromInstruction(Insn, 28, 4);
+ unsigned imm = fieldFromInstruction(Insn, 0, 24) << 2;
if (pred == 0xF) {
Inst.setOpcode(ARM::BLXi);
- imm |= fieldFromInstruction32(Insn, 24, 1) << 1;
+ imm |= fieldFromInstruction(Insn, 24, 1) << 1;
if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
true, 4, Inst, Decoder))
Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
}
-static DecodeStatus DecodeAddrMode6Operand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rm = fieldFromInstruction32(Val, 0, 4);
- unsigned align = fieldFromInstruction32(Val, 4, 2);
+ unsigned Rm = fieldFromInstruction(Val, 0, 4);
+ unsigned align = fieldFromInstruction(Val, 4, 2);
if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler::Fail;
return S;
}
-static DecodeStatus DecodeVLDInstruction(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
- Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
- unsigned wb = fieldFromInstruction32(Insn, 16, 4);
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
- unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
+ unsigned Rd = fieldFromInstruction(Insn, 12, 4);
+ Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
+ unsigned wb = fieldFromInstruction(Insn, 16, 4);
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
+ unsigned Rm = fieldFromInstruction(Insn, 0, 4);
// First output register
switch (Inst.getOpcode()) {
case ARM::VLD2b8wb_register:
case ARM::VLD2b16wb_register:
case ARM::VLD2b32wb_register:
+ Inst.addOperand(MCOperand::CreateImm(0));
+ break;
case ARM::VLD3d8_UPD:
case ARM::VLD3d16_UPD:
case ARM::VLD3d32_UPD:
!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler::Fail;
break;
+ case ARM::VLD2d8wb_fixed:
+ case ARM::VLD2d16wb_fixed:
+ case ARM::VLD2d32wb_fixed:
+ case ARM::VLD2b8wb_fixed:
+ case ARM::VLD2b16wb_fixed:
+ case ARM::VLD2b32wb_fixed:
+ case ARM::VLD2q8wb_fixed:
+ case ARM::VLD2q16wb_fixed:
+ case ARM::VLD2q32wb_fixed:
+ break;
}
return S;
}
-static DecodeStatus DecodeVSTInstruction(llvm::MCInst &Inst, unsigned Insn,
- uint64_t Address, const void *Decoder) {
- DecodeStatus S = MCDisassembler::Success;
+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);
+}
- unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
- Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
- unsigned wb = fieldFromInstruction32(Insn, 16, 4);
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- Rn |= fieldFromInstruction32(Insn, 4, 2) << 4;
- unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
+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;
- // Writeback Operand
- switch (Inst.getOpcode()) {
- case ARM::VST1d8wb_fixed:
- case ARM::VST1d16wb_fixed:
- case ARM::VST1d32wb_fixed:
- case ARM::VST1d64wb_fixed:
+ 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;
+
+ unsigned Rd = fieldFromInstruction(Insn, 12, 4);
+ Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
+ unsigned wb = fieldFromInstruction(Insn, 16, 4);
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ Rn |= fieldFromInstruction(Insn, 4, 2) << 4;
+ unsigned Rm = fieldFromInstruction(Insn, 0, 4);
+
+ // Writeback Operand
+ switch (Inst.getOpcode()) {
+ case ARM::VST1d8wb_fixed:
+ case ARM::VST1d16wb_fixed:
+ case ARM::VST1d32wb_fixed:
+ case ARM::VST1d64wb_fixed:
case ARM::VST1d8wb_register:
case ARM::VST1d16wb_register:
case ARM::VST1d32wb_register:
case ARM::VST2b8wb_register:
case ARM::VST2b16wb_register:
case ARM::VST2b32wb_register:
+ if (Rm == 0xF)
+ return MCDisassembler::Fail;
+ Inst.addOperand(MCOperand::CreateImm(0));
+ break;
case ARM::VST3d8_UPD:
case ARM::VST3d16_UPD:
case ARM::VST3d32_UPD:
case ARM::VST1q16wb_fixed:
case ARM::VST1q32wb_fixed:
case ARM::VST1q64wb_fixed:
+ case ARM::VST1d8Twb_fixed:
+ case ARM::VST1d16Twb_fixed:
+ case ARM::VST1d32Twb_fixed:
+ case ARM::VST1d64Twb_fixed:
+ case ARM::VST1d8Qwb_fixed:
+ case ARM::VST1d16Qwb_fixed:
+ case ARM::VST1d32Qwb_fixed:
+ case ARM::VST1d64Qwb_fixed:
+ case ARM::VST2d8wb_fixed:
+ case ARM::VST2d16wb_fixed:
+ case ARM::VST2d32wb_fixed:
+ case ARM::VST2q8wb_fixed:
+ case ARM::VST2q16wb_fixed:
+ case ARM::VST2q32wb_fixed:
+ case ARM::VST2b8wb_fixed:
+ case ARM::VST2b16wb_fixed:
+ case ARM::VST2b32wb_fixed:
break;
}
return S;
}
-static DecodeStatus DecodeVLD1DupInstruction(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
- Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
- unsigned align = fieldFromInstruction32(Insn, 4, 1);
- unsigned size = fieldFromInstruction32(Insn, 6, 2);
+ unsigned Rd = fieldFromInstruction(Insn, 12, 4);
+ Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned Rm = fieldFromInstruction(Insn, 0, 4);
+ unsigned align = fieldFromInstruction(Insn, 4, 1);
+ unsigned size = fieldFromInstruction(Insn, 6, 2);
+ if (size == 0 && align == 1)
+ return MCDisassembler::Fail;
align *= (1 << size);
switch (Inst.getOpcode()) {
return S;
}
-static DecodeStatus DecodeVLD2DupInstruction(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
- Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
- unsigned align = fieldFromInstruction32(Insn, 4, 1);
- unsigned size = 1 << fieldFromInstruction32(Insn, 6, 2);
- unsigned pred = fieldFromInstruction32(Insn, 22, 4);
+ unsigned Rd = fieldFromInstruction(Insn, 12, 4);
+ Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned Rm = fieldFromInstruction(Insn, 0, 4);
+ unsigned align = fieldFromInstruction(Insn, 4, 1);
+ unsigned size = 1 << fieldFromInstruction(Insn, 6, 2);
align *= 2*size;
switch (Inst.getOpcode()) {
return MCDisassembler::Fail;
Inst.addOperand(MCOperand::CreateImm(align));
- if (Rm == 0xD)
- Inst.addOperand(MCOperand::CreateReg(0));
- else if (Rm != 0xF) {
+ if (Rm != 0xD && Rm != 0xF) {
if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler::Fail;
}
- if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
- return MCDisassembler::Fail;
-
return S;
}
-static DecodeStatus DecodeVLD3DupInstruction(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
- Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
- unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
+ unsigned Rd = fieldFromInstruction(Insn, 12, 4);
+ Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned Rm = fieldFromInstruction(Insn, 0, 4);
+ unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler::Fail;
return S;
}
-static DecodeStatus DecodeVLD4DupInstruction(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
- Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
- unsigned size = fieldFromInstruction32(Insn, 6, 2);
- unsigned inc = fieldFromInstruction32(Insn, 5, 1) + 1;
- unsigned align = fieldFromInstruction32(Insn, 4, 1);
+ unsigned Rd = fieldFromInstruction(Insn, 12, 4);
+ Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned Rm = fieldFromInstruction(Insn, 0, 4);
+ unsigned size = fieldFromInstruction(Insn, 6, 2);
+ unsigned inc = fieldFromInstruction(Insn, 5, 1) + 1;
+ unsigned align = fieldFromInstruction(Insn, 4, 1);
if (size == 0x3) {
- size = 4;
+ if (align == 0)
+ return MCDisassembler::Fail;
align = 16;
} else {
if (size == 2) {
- size = 1 << size;
align *= 8;
} else {
size = 1 << size;
}
static DecodeStatus
-DecodeNEONModImmInstruction(llvm::MCInst &Inst, unsigned Insn,
+DecodeNEONModImmInstruction(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
- Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
- unsigned imm = fieldFromInstruction32(Insn, 0, 4);
- imm |= fieldFromInstruction32(Insn, 16, 3) << 4;
- imm |= fieldFromInstruction32(Insn, 24, 1) << 7;
- imm |= fieldFromInstruction32(Insn, 8, 4) << 8;
- imm |= fieldFromInstruction32(Insn, 5, 1) << 12;
- unsigned Q = fieldFromInstruction32(Insn, 6, 1);
+ unsigned Rd = fieldFromInstruction(Insn, 12, 4);
+ Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
+ unsigned imm = fieldFromInstruction(Insn, 0, 4);
+ imm |= fieldFromInstruction(Insn, 16, 3) << 4;
+ imm |= fieldFromInstruction(Insn, 24, 1) << 7;
+ imm |= fieldFromInstruction(Insn, 8, 4) << 8;
+ imm |= fieldFromInstruction(Insn, 5, 1) << 12;
+ unsigned Q = fieldFromInstruction(Insn, 6, 1);
if (Q) {
if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
return S;
}
-static DecodeStatus DecodeVSHLMaxInstruction(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
- Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
- unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
- Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
- unsigned size = fieldFromInstruction32(Insn, 18, 2);
+ unsigned Rd = fieldFromInstruction(Insn, 12, 4);
+ Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
+ unsigned Rm = fieldFromInstruction(Insn, 0, 4);
+ Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
+ unsigned size = fieldFromInstruction(Insn, 18, 2);
if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler::Fail;
return S;
}
-static DecodeStatus DecodeShiftRight8Imm(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
Inst.addOperand(MCOperand::CreateImm(8 - Val));
return MCDisassembler::Success;
}
-static DecodeStatus DecodeShiftRight16Imm(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
Inst.addOperand(MCOperand::CreateImm(16 - Val));
return MCDisassembler::Success;
}
-static DecodeStatus DecodeShiftRight32Imm(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
Inst.addOperand(MCOperand::CreateImm(32 - Val));
return MCDisassembler::Success;
}
-static DecodeStatus DecodeShiftRight64Imm(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
Inst.addOperand(MCOperand::CreateImm(64 - Val));
return MCDisassembler::Success;
}
-static DecodeStatus DecodeTBLInstruction(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
- Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- Rn |= fieldFromInstruction32(Insn, 7, 1) << 4;
- unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
- Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
- unsigned op = fieldFromInstruction32(Insn, 6, 1);
+ unsigned Rd = fieldFromInstruction(Insn, 12, 4);
+ Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ Rn |= fieldFromInstruction(Insn, 7, 1) << 4;
+ unsigned Rm = fieldFromInstruction(Insn, 0, 4);
+ Rm |= fieldFromInstruction(Insn, 5, 1) << 4;
+ unsigned op = fieldFromInstruction(Insn, 6, 1);
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
return MCDisassembler::Fail;
return S;
}
-static DecodeStatus DecodeThumbAddSpecialReg(llvm::MCInst &Inst, uint16_t Insn,
+static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned dst = fieldFromInstruction16(Insn, 8, 3);
- unsigned imm = fieldFromInstruction16(Insn, 0, 8);
+ unsigned dst = fieldFromInstruction(Insn, 8, 3);
+ unsigned imm = fieldFromInstruction(Insn, 0, 8);
if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
return MCDisassembler::Fail;
return S;
}
-static DecodeStatus DecodeThumbBROperand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
- Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
+ if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<12>(Val<<1) + 4,
+ true, 2, Inst, Decoder))
+ Inst.addOperand(MCOperand::CreateImm(SignExtend32<12>(Val << 1)));
return MCDisassembler::Success;
}
-static DecodeStatus DecodeT2BROperand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
- Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
+ if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<21>(Val) + 4,
+ true, 4, Inst, Decoder))
+ Inst.addOperand(MCOperand::CreateImm(SignExtend32<21>(Val)));
return MCDisassembler::Success;
}
-static DecodeStatus DecodeThumbCmpBROperand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
- Inst.addOperand(MCOperand::CreateImm(SignExtend32<7>(Val << 1)));
+ if (!tryAddingSymbolicOperand(Address, Address + (Val<<1) + 4,
+ true, 2, Inst, Decoder))
+ Inst.addOperand(MCOperand::CreateImm(Val << 1));
return MCDisassembler::Success;
}
-static DecodeStatus DecodeThumbAddrModeRR(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rn = fieldFromInstruction32(Val, 0, 3);
- unsigned Rm = fieldFromInstruction32(Val, 3, 3);
+ unsigned Rn = fieldFromInstruction(Val, 0, 3);
+ unsigned Rm = fieldFromInstruction(Val, 3, 3);
if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler::Fail;
return S;
}
-static DecodeStatus DecodeThumbAddrModeIS(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rn = fieldFromInstruction32(Val, 0, 3);
- unsigned imm = fieldFromInstruction32(Val, 3, 5);
+ unsigned Rn = fieldFromInstruction(Val, 0, 3);
+ unsigned imm = fieldFromInstruction(Val, 3, 5);
if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler::Fail;
return S;
}
-static DecodeStatus DecodeThumbAddrModePC(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
unsigned imm = Val << 2;
return MCDisassembler::Success;
}
-static DecodeStatus DecodeThumbAddrModeSP(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
Inst.addOperand(MCOperand::CreateReg(ARM::SP));
Inst.addOperand(MCOperand::CreateImm(Val));
return MCDisassembler::Success;
}
-static DecodeStatus DecodeT2AddrModeSOReg(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rn = fieldFromInstruction32(Val, 6, 4);
- unsigned Rm = fieldFromInstruction32(Val, 2, 4);
- unsigned imm = fieldFromInstruction32(Val, 0, 2);
+ unsigned Rn = fieldFromInstruction(Val, 6, 4);
+ 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;
return S;
}
-static DecodeStatus DecodeT2LoadShift(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
+ unsigned Rt = fieldFromInstruction(Insn, 12, 4);
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+
+ uint64_t featureBits = ((const MCDisassembler*)Decoder)->getSubtargetInfo()
+ .getFeatureBits();
+ bool hasMP = featureBits & ARM::FeatureMP;
+ bool hasV7Ops = featureBits & ARM::HasV7Ops;
+
+ 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:
+ Inst.setOpcode(ARM::t2PLDWs);
+ break;
+ case ARM::t2LDRSBs:
+ Inst.setOpcode(ARM::t2PLIs);
+ default:
+ break;
+ }
+ }
+
switch (Inst.getOpcode()) {
case ARM::t2PLDs:
- case ARM::t2PLDWs:
+ break;
case ARM::t2PLIs:
+ if (!hasV7Ops)
+ return MCDisassembler::Fail;
break;
- default: {
- unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
- if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
+ case ARM::t2PLDWs:
+ if (!hasV7Ops || !hasMP)
+ return MCDisassembler::Fail;
+ 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;
+
+ 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);
+ unsigned add = fieldFromInstruction(Insn, 9, 1);
+
+ uint64_t featureBits = ((const MCDisassembler*)Decoder)->getSubtargetInfo()
+ .getFeatureBits();
+ bool hasMP = featureBits & ARM::FeatureMP;
+ bool hasV7Ops = featureBits & ARM::HasV7Ops;
+
+ 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);
}
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- if (Rn == 0xF) {
+ if (Rt == 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::t2PLDs:
- Inst.setOpcode(ARM::t2PLDi12);
- Inst.addOperand(MCOperand::CreateReg(ARM::PC));
- break;
- default:
+ case ARM::t2LDRSHi8:
+ return MCDisassembler::Fail;
+ case ARM::t2LDRHi8:
+ if (!add)
+ Inst.setOpcode(ARM::t2PLDWi8);
+ break;
+ case ARM::t2LDRSBi8:
+ Inst.setOpcode(ARM::t2PLIi8);
+ break;
+ default:
+ break;
+ }
+ }
+
+ switch (Inst.getOpcode()) {
+ case ARM::t2PLDi8:
+ break;
+ case ARM::t2PLIi8:
+ if (!hasV7Ops)
+ return MCDisassembler::Fail;
+ break;
+ case ARM::t2PLDWi8:
+ if (!hasV7Ops || !hasMP)
return MCDisassembler::Fail;
+ 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);
+ unsigned Rt = fieldFromInstruction(Insn, 12, 4);
+ unsigned imm = fieldFromInstruction(Insn, 0, 12);
+ imm |= (Rn << 13);
+
+ uint64_t featureBits = ((const MCDisassembler*)Decoder)->getSubtargetInfo()
+ .getFeatureBits();
+ bool hasMP = (featureBits & ARM::FeatureMP);
+ bool hasV7Ops = (featureBits & ARM::HasV7Ops);
+
+ if (Rn == 15) {
+ switch (Inst.getOpcode()) {
+ 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);
+ }
- int imm = fieldFromInstruction32(Insn, 0, 12);
- if (!fieldFromInstruction32(Insn, 23, 1)) imm *= -1;
- Inst.addOperand(MCOperand::CreateImm(imm));
+ if (Rt == 15) {
+ switch (Inst.getOpcode()) {
+ case ARM::t2LDRSHi12:
+ return MCDisassembler::Fail;
+ case ARM::t2LDRHi12:
+ Inst.setOpcode(ARM::t2PLDWi12);
+ break;
+ case ARM::t2LDRSBi12:
+ Inst.setOpcode(ARM::t2PLIi12);
+ break;
+ default:
+ break;
+ }
+ }
- return S;
+ switch (Inst.getOpcode()) {
+ case ARM::t2PLDi12:
+ break;
+ case ARM::t2PLIi12:
+ if (!hasV7Ops)
+ return MCDisassembler::Fail;
+ break;
+ case ARM::t2PLDWi12:
+ if (!hasV7Ops || !hasMP)
+ return MCDisassembler::Fail;
+ break;
+ default:
+ if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
+ return MCDisassembler::Fail;
}
- unsigned addrmode = fieldFromInstruction32(Insn, 4, 2);
- addrmode |= fieldFromInstruction32(Insn, 0, 4) << 2;
- addrmode |= fieldFromInstruction32(Insn, 16, 4) << 6;
- if (!Check(S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
+ 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);
+
+ uint64_t featureBits = ((const MCDisassembler*)Decoder)->getSubtargetInfo()
+ .getFeatureBits();
+ bool hasV7Ops = (featureBits & ARM::HasV7Ops);
+
+ if (Rt == 15) {
+ switch (Inst.getOpcode()) {
+ case ARM::t2LDRBpci:
+ case ARM::t2LDRHpci:
+ Inst.setOpcode(ARM::t2PLDpci);
+ break;
+ case ARM::t2LDRSBpci:
+ Inst.setOpcode(ARM::t2PLIpci);
+ break;
+ case ARM::t2LDRSHpci:
+ return MCDisassembler::Fail;
+ default:
+ break;
+ }
+ }
+
+ switch(Inst.getOpcode()) {
+ case ARM::t2PLDpci:
+ break;
+ case ARM::t2PLIpci:
+ if (!hasV7Ops)
+ return MCDisassembler::Fail;
+ break;
+ default:
+ if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, 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;
}
-static DecodeStatus DecodeT2Imm8S4(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
- int imm = Val & 0xFF;
- if (!(Val & 0x100)) imm *= -1;
- Inst.addOperand(MCOperand::CreateImm(imm << 2));
+ if (Val == 0)
+ Inst.addOperand(MCOperand::CreateImm(INT32_MIN));
+ else {
+ int imm = Val & 0xFF;
+
+ if (!(Val & 0x100)) imm *= -1;
+ Inst.addOperand(MCOperand::CreateImm(imm * 4));
+ }
return MCDisassembler::Success;
}
-static DecodeStatus DecodeT2AddrModeImm8s4(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rn = fieldFromInstruction32(Val, 9, 4);
- unsigned imm = fieldFromInstruction32(Val, 0, 9);
+ unsigned Rn = fieldFromInstruction(Val, 9, 4);
+ unsigned imm = fieldFromInstruction(Val, 0, 9);
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler::Fail;
return S;
}
-static DecodeStatus DecodeT2AddrModeImm0_1020s4(llvm::MCInst &Inst,unsigned Val,
+static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rn = fieldFromInstruction32(Val, 8, 4);
- unsigned imm = fieldFromInstruction32(Val, 0, 8);
+ unsigned Rn = fieldFromInstruction(Val, 8, 4);
+ unsigned imm = fieldFromInstruction(Val, 0, 8);
if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler::Fail;
return S;
}
-static DecodeStatus DecodeT2Imm8(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
int imm = Val & 0xFF;
if (Val == 0)
}
-static DecodeStatus DecodeT2AddrModeImm8(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rn = fieldFromInstruction32(Val, 9, 4);
- unsigned imm = fieldFromInstruction32(Val, 0, 9);
+ 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()) {
return S;
}
-static DecodeStatus DecodeT2LdStPre(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned addr = fieldFromInstruction32(Insn, 0, 8);
- addr |= fieldFromInstruction32(Insn, 9, 1) << 8;
+ unsigned Rt = fieldFromInstruction(Insn, 12, 4);
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned addr = fieldFromInstruction(Insn, 0, 8);
+ addr |= fieldFromInstruction(Insn, 9, 1) << 8;
addr |= Rn << 9;
- unsigned load = fieldFromInstruction32(Insn, 20, 1);
+ 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;
}
- if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
+ if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler::Fail;
if (load) {
return S;
}
-static DecodeStatus DecodeT2AddrModeImm12(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rn = fieldFromInstruction32(Val, 13, 4);
- unsigned imm = fieldFromInstruction32(Val, 0, 12);
+ 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;
}
-static DecodeStatus DecodeThumbAddSPImm(llvm::MCInst &Inst, uint16_t Insn,
+static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Insn,
uint64_t Address, const void *Decoder) {
- unsigned imm = fieldFromInstruction16(Insn, 0, 7);
+ unsigned imm = fieldFromInstruction(Insn, 0, 7);
Inst.addOperand(MCOperand::CreateReg(ARM::SP));
Inst.addOperand(MCOperand::CreateReg(ARM::SP));
return MCDisassembler::Success;
}
-static DecodeStatus DecodeThumbAddSPReg(llvm::MCInst &Inst, uint16_t Insn,
+static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
if (Inst.getOpcode() == ARM::tADDrSP) {
- unsigned Rdm = fieldFromInstruction16(Insn, 0, 3);
- Rdm |= fieldFromInstruction16(Insn, 7, 1) << 3;
+ unsigned Rdm = fieldFromInstruction(Insn, 0, 3);
+ Rdm |= fieldFromInstruction(Insn, 7, 1) << 3;
if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
return MCDisassembler::Fail;
+ Inst.addOperand(MCOperand::CreateReg(ARM::SP));
if (!Check(S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
return MCDisassembler::Fail;
- Inst.addOperand(MCOperand::CreateReg(ARM::SP));
} else if (Inst.getOpcode() == ARM::tADDspr) {
- unsigned Rm = fieldFromInstruction16(Insn, 3, 4);
+ unsigned Rm = fieldFromInstruction(Insn, 3, 4);
Inst.addOperand(MCOperand::CreateReg(ARM::SP));
Inst.addOperand(MCOperand::CreateReg(ARM::SP));
return S;
}
-static DecodeStatus DecodeThumbCPS(llvm::MCInst &Inst, uint16_t Insn,
+static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
uint64_t Address, const void *Decoder) {
- unsigned imod = fieldFromInstruction16(Insn, 4, 1) | 0x2;
- unsigned flags = fieldFromInstruction16(Insn, 0, 3);
+ unsigned imod = fieldFromInstruction(Insn, 4, 1) | 0x2;
+ unsigned flags = fieldFromInstruction(Insn, 0, 3);
Inst.addOperand(MCOperand::CreateImm(imod));
Inst.addOperand(MCOperand::CreateImm(flags));
return MCDisassembler::Success;
}
-static DecodeStatus DecodePostIdxReg(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
- unsigned add = fieldFromInstruction32(Insn, 4, 1);
+ unsigned Rm = fieldFromInstruction(Insn, 0, 4);
+ unsigned add = fieldFromInstruction(Insn, 4, 1);
- if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
+ if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
return MCDisassembler::Fail;
Inst.addOperand(MCOperand::CreateImm(add));
return S;
}
-static DecodeStatus DecodeThumbBLXOffset(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
+ // Val is passed in as S:J1:J2:imm10H:imm10L:'0'
+ // Note only one trailing zero not two. Also the J1 and J2 values are from
+ // the encoded instruction. So here change to I1 and I2 values via:
+ // I1 = NOT(J1 EOR S);
+ // I2 = NOT(J2 EOR S);
+ // and build the imm32 with two trailing zeros as documented:
+ // imm32 = SignExtend(S:I1:I2:imm10H:imm10L:'00', 32);
+ unsigned S = (Val >> 23) & 1;
+ unsigned J1 = (Val >> 22) & 1;
+ unsigned J2 = (Val >> 21) & 1;
+ unsigned I1 = !(J1 ^ S);
+ unsigned I2 = !(J2 ^ S);
+ unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
+ int imm32 = SignExtend32<25>(tmp << 1);
+
if (!tryAddingSymbolicOperand(Address,
- (Address & ~2u) + SignExtend32<22>(Val << 1) + 4,
+ (Address & ~2u) + imm32 + 4,
true, 4, Inst, Decoder))
- Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
+ Inst.addOperand(MCOperand::CreateImm(imm32));
return MCDisassembler::Success;
}
-static DecodeStatus DecodeCoprocessor(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
if (Val == 0xA || Val == 0xB)
return MCDisassembler::Fail;
+ uint64_t featureBits = ((const MCDisassembler*)Decoder)->getSubtargetInfo()
+ .getFeatureBits();
+ if ((featureBits & ARM::HasV8Ops) && !(Val == 14 || Val == 15))
+ return MCDisassembler::Fail;
+
Inst.addOperand(MCOperand::CreateImm(Val));
return MCDisassembler::Success;
}
static DecodeStatus
-DecodeThumbTableBranch(llvm::MCInst &Inst, unsigned Insn,
+DecodeThumbTableBranch(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned Rm = fieldFromInstruction(Insn, 0, 4);
if (Rn == ARM::SP) S = MCDisassembler::SoftFail;
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
}
static DecodeStatus
-DecodeThumb2BCCInstruction(llvm::MCInst &Inst, unsigned Insn,
+DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned pred = fieldFromInstruction32(Insn, 22, 4);
+ unsigned pred = fieldFromInstruction(Insn, 22, 4);
if (pred == 0xE || pred == 0xF) {
- unsigned opc = fieldFromInstruction32(Insn, 4, 28);
+ unsigned opc = fieldFromInstruction(Insn, 4, 28);
switch (opc) {
default:
return MCDisassembler::Fail;
break;
}
- unsigned imm = fieldFromInstruction32(Insn, 0, 4);
+ unsigned imm = fieldFromInstruction(Insn, 0, 4);
return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
}
- unsigned brtarget = fieldFromInstruction32(Insn, 0, 11) << 1;
- brtarget |= fieldFromInstruction32(Insn, 11, 1) << 19;
- brtarget |= fieldFromInstruction32(Insn, 13, 1) << 18;
- brtarget |= fieldFromInstruction32(Insn, 16, 6) << 12;
- brtarget |= fieldFromInstruction32(Insn, 26, 1) << 20;
+ unsigned brtarget = fieldFromInstruction(Insn, 0, 11) << 1;
+ brtarget |= fieldFromInstruction(Insn, 11, 1) << 19;
+ brtarget |= fieldFromInstruction(Insn, 13, 1) << 18;
+ brtarget |= fieldFromInstruction(Insn, 16, 6) << 12;
+ brtarget |= fieldFromInstruction(Insn, 26, 1) << 20;
if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
return MCDisassembler::Fail;
// Decode a shifted immediate operand. These basically consist
// of an 8-bit value, and a 4-bit directive that specifies either
// a splat operation or a rotation.
-static DecodeStatus DecodeT2SOImm(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
- unsigned ctrl = fieldFromInstruction32(Val, 10, 2);
+ unsigned ctrl = fieldFromInstruction(Val, 10, 2);
if (ctrl == 0) {
- unsigned byte = fieldFromInstruction32(Val, 8, 2);
- unsigned imm = fieldFromInstruction32(Val, 0, 8);
+ unsigned byte = fieldFromInstruction(Val, 8, 2);
+ unsigned imm = fieldFromInstruction(Val, 0, 8);
switch (byte) {
case 0:
Inst.addOperand(MCOperand::CreateImm(imm));
break;
}
} else {
- unsigned unrot = fieldFromInstruction32(Val, 0, 7) | 0x80;
- unsigned rot = fieldFromInstruction32(Val, 7, 5);
+ unsigned unrot = fieldFromInstruction(Val, 0, 7) | 0x80;
+ unsigned rot = fieldFromInstruction(Val, 7, 5);
unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
Inst.addOperand(MCOperand::CreateImm(imm));
}
}
static DecodeStatus
-DecodeThumbBCCTargetOperand(llvm::MCInst &Inst, unsigned Val,
+DecodeThumbBCCTargetOperand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder){
- Inst.addOperand(MCOperand::CreateImm(Val << 1));
+ if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<9>(Val<<1) + 4,
+ true, 2, Inst, Decoder))
+ Inst.addOperand(MCOperand::CreateImm(SignExtend32<9>(Val << 1)));
return MCDisassembler::Success;
}
-static DecodeStatus DecodeThumbBLTargetOperand(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder){
- if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<22>(Val<<1) + 4,
+ // Val is passed in as S:J1:J2:imm10:imm11
+ // Note no trailing zero after imm11. Also the J1 and J2 values are from
+ // the encoded instruction. So here change to I1 and I2 values via:
+ // I1 = NOT(J1 EOR S);
+ // I2 = NOT(J2 EOR S);
+ // and build the imm32 with one trailing zero as documented:
+ // imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
+ unsigned S = (Val >> 23) & 1;
+ unsigned J1 = (Val >> 22) & 1;
+ unsigned J2 = (Val >> 21) & 1;
+ unsigned I1 = !(J1 ^ S);
+ unsigned I2 = !(J2 ^ S);
+ unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
+ int imm32 = SignExtend32<25>(tmp << 1);
+
+ if (!tryAddingSymbolicOperand(Address, Address + imm32 + 4,
true, 4, Inst, Decoder))
- Inst.addOperand(MCOperand::CreateImm(SignExtend32<22>(Val << 1)));
+ Inst.addOperand(MCOperand::CreateImm(imm32));
return MCDisassembler::Success;
}
-static DecodeStatus DecodeMemBarrierOption(llvm::MCInst &Inst, unsigned Val,
+static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Val,
uint64_t Address, const void *Decoder) {
- switch (Val) {
- default:
+ if (Val & ~0xf)
return MCDisassembler::Fail;
- case 0xF: // SY
- case 0xE: // ST
- case 0xB: // ISH
- case 0xA: // ISHST
- case 0x7: // NSH
- case 0x6: // NSHST
- case 0x3: // OSH
- case 0x2: // OSHST
- break;
- }
Inst.addOperand(MCOperand::CreateImm(Val));
return MCDisassembler::Success;
}
-static DecodeStatus DecodeMSRMask(llvm::MCInst &Inst, unsigned Val,
+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;
+ DecodeStatus S = MCDisassembler::Success;
+ uint64_t FeatureBits = ((const MCDisassembler*)Decoder)->getSubtargetInfo()
+ .getFeatureBits();
+ if (FeatureBits & ARM::FeatureMClass) {
+ unsigned ValLow = Val & 0xff;
+
+ // Validate the SYSm value first.
+ switch (ValLow) {
+ case 0: // apsr
+ case 1: // iapsr
+ case 2: // eapsr
+ case 3: // xpsr
+ case 5: // ipsr
+ case 6: // epsr
+ case 7: // iepsr
+ case 8: // msp
+ case 9: // psp
+ case 16: // primask
+ case 20: // control
+ break;
+ case 17: // basepri
+ case 18: // basepri_max
+ case 19: // faultmask
+ if (!(FeatureBits & ARM::HasV7Ops))
+ // Values basepri, basepri_max and faultmask are only valid for v7m.
+ return MCDisassembler::Fail;
+ break;
+ default:
+ return MCDisassembler::Fail;
+ }
+
+ if (Inst.getOpcode() == ARM::t2MSR_M) {
+ unsigned Mask = fieldFromInstruction(Val, 10, 2);
+ if (!(FeatureBits & ARM::HasV7Ops)) {
+ // The ARMv6-M MSR bits {11-10} can be only 0b10, other values are
+ // unpredictable.
+ if (Mask != 2)
+ S = MCDisassembler::SoftFail;
+ }
+ else {
+ // The ARMv7-M architecture stores an additional 2-bit mask value in
+ // MSR bits {11-10}. The mask is used only with apsr, iapsr, eapsr and
+ // xpsr, it has to be 0b10 in other cases. Bit mask{1} indicates if
+ // the NZCVQ bits should be moved by the instruction. Bit mask{0}
+ // indicates the move for the GE{3:0} bits, the mask{0} bit can be set
+ // only if the processor includes the DSP extension.
+ if (Mask == 0 || (Mask != 2 && ValLow > 3) ||
+ (!(FeatureBits & ARM::FeatureDSPThumb2) && (Mask & 1)))
+ S = MCDisassembler::SoftFail;
+ }
+ }
+ } else {
+ // A/R class
+ if (Val == 0)
+ return MCDisassembler::Fail;
+ }
+ Inst.addOperand(MCOperand::CreateImm(Val));
+ return S;
+}
+
+static DecodeStatus DecodeBankedReg(MCInst &Inst, unsigned Val,
+ uint64_t Address, const void *Decoder) {
+
+ unsigned R = fieldFromInstruction(Val, 5, 1);
+ unsigned SysM = fieldFromInstruction(Val, 0, 5);
+
+ // The table of encodings for these banked registers comes from B9.2.3 of the
+ // ARM ARM. There are patterns, but nothing regular enough to make this logic
+ // neater. So by fiat, these values are UNPREDICTABLE:
+ if (!R) {
+ if (SysM == 0x7 || SysM == 0xf || SysM == 0x18 || SysM == 0x19 ||
+ SysM == 0x1a || SysM == 0x1b)
+ return MCDisassembler::SoftFail;
+ } else {
+ if (SysM != 0xe && SysM != 0x10 && SysM != 0x12 && SysM != 0x14 &&
+ SysM != 0x16 && SysM != 0x1c && SysM != 0x1e)
+ return MCDisassembler::SoftFail;
+ }
+
Inst.addOperand(MCOperand::CreateImm(Val));
return MCDisassembler::Success;
}
-static DecodeStatus DecodeDoubleRegLoad(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned pred = fieldFromInstruction32(Insn, 28, 4);
+ unsigned Rt = fieldFromInstruction(Insn, 12, 4);
+ 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(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder){
DecodeStatus S = MCDisassembler::Success;
- unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
- unsigned Rt = fieldFromInstruction32(Insn, 0, 4);
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned pred = fieldFromInstruction32(Insn, 28, 4);
+ unsigned Rd = fieldFromInstruction(Insn, 12, 4);
+ unsigned Rt = fieldFromInstruction(Insn, 0, 4);
+ 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;
return S;
}
-static DecodeStatus DecodeLDRPreImm(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
- unsigned imm = fieldFromInstruction32(Insn, 0, 12);
- imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
- imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
- unsigned pred = fieldFromInstruction32(Insn, 28, 4);
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned Rt = fieldFromInstruction(Insn, 12, 4);
+ unsigned imm = fieldFromInstruction(Insn, 0, 12);
+ imm |= fieldFromInstruction(Insn, 16, 4) << 13;
+ imm |= fieldFromInstruction(Insn, 23, 1) << 12;
+ unsigned pred = fieldFromInstruction(Insn, 28, 4);
if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
return S;
}
-static DecodeStatus DecodeLDRPreReg(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
- unsigned imm = fieldFromInstruction32(Insn, 0, 12);
- imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
- imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
- unsigned pred = fieldFromInstruction32(Insn, 28, 4);
- unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned Rt = fieldFromInstruction(Insn, 12, 4);
+ unsigned imm = fieldFromInstruction(Insn, 0, 12);
+ imm |= fieldFromInstruction(Insn, 16, 4) << 13;
+ imm |= fieldFromInstruction(Insn, 23, 1) << 12;
+ unsigned pred = fieldFromInstruction(Insn, 28, 4);
+ unsigned Rm = fieldFromInstruction(Insn, 0, 4);
if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
if (Rm == 0xF) S = MCDisassembler::SoftFail;
}
-static DecodeStatus DecodeSTRPreImm(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
- unsigned imm = fieldFromInstruction32(Insn, 0, 12);
- imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
- imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
- unsigned pred = fieldFromInstruction32(Insn, 28, 4);
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned Rt = fieldFromInstruction(Insn, 12, 4);
+ unsigned imm = fieldFromInstruction(Insn, 0, 12);
+ imm |= fieldFromInstruction(Insn, 16, 4) << 13;
+ imm |= fieldFromInstruction(Insn, 23, 1) << 12;
+ unsigned pred = fieldFromInstruction(Insn, 28, 4);
if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
return S;
}
-static DecodeStatus DecodeSTRPreReg(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
- unsigned imm = fieldFromInstruction32(Insn, 0, 12);
- imm |= fieldFromInstruction32(Insn, 16, 4) << 13;
- imm |= fieldFromInstruction32(Insn, 23, 1) << 12;
- unsigned pred = fieldFromInstruction32(Insn, 28, 4);
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned Rt = fieldFromInstruction(Insn, 12, 4);
+ unsigned imm = fieldFromInstruction(Insn, 0, 12);
+ imm |= fieldFromInstruction(Insn, 16, 4) << 13;
+ imm |= fieldFromInstruction(Insn, 23, 1) << 12;
+ unsigned pred = fieldFromInstruction(Insn, 28, 4);
if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
return S;
}
-static DecodeStatus DecodeVLD1LN(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
- unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
- Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
- unsigned size = fieldFromInstruction32(Insn, 10, 2);
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned Rm = fieldFromInstruction(Insn, 0, 4);
+ unsigned Rd = fieldFromInstruction(Insn, 12, 4);
+ Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
+ unsigned size = fieldFromInstruction(Insn, 10, 2);
unsigned align = 0;
unsigned index = 0;
default:
return MCDisassembler::Fail;
case 0:
- if (fieldFromInstruction32(Insn, 4, 1))
+ if (fieldFromInstruction(Insn, 4, 1))
return MCDisassembler::Fail; // UNDEFINED
- index = fieldFromInstruction32(Insn, 5, 3);
+ index = fieldFromInstruction(Insn, 5, 3);
break;
case 1:
- if (fieldFromInstruction32(Insn, 5, 1))
+ if (fieldFromInstruction(Insn, 5, 1))
return MCDisassembler::Fail; // UNDEFINED
- index = fieldFromInstruction32(Insn, 6, 2);
- if (fieldFromInstruction32(Insn, 4, 1))
+ index = fieldFromInstruction(Insn, 6, 2);
+ if (fieldFromInstruction(Insn, 4, 1))
align = 2;
break;
case 2:
- if (fieldFromInstruction32(Insn, 6, 1))
+ if (fieldFromInstruction(Insn, 6, 1))
return MCDisassembler::Fail; // UNDEFINED
- index = fieldFromInstruction32(Insn, 7, 1);
- if (fieldFromInstruction32(Insn, 4, 2) != 0)
- align = 4;
+ index = fieldFromInstruction(Insn, 7, 1);
+
+ switch (fieldFromInstruction(Insn, 4, 2)) {
+ case 0 :
+ align = 0; break;
+ case 3:
+ align = 4; break;
+ default:
+ return MCDisassembler::Fail;
+ }
+ break;
}
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
return S;
}
-static DecodeStatus DecodeVST1LN(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
- unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
- Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
- unsigned size = fieldFromInstruction32(Insn, 10, 2);
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned Rm = fieldFromInstruction(Insn, 0, 4);
+ unsigned Rd = fieldFromInstruction(Insn, 12, 4);
+ Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
+ unsigned size = fieldFromInstruction(Insn, 10, 2);
unsigned align = 0;
unsigned index = 0;
default:
return MCDisassembler::Fail;
case 0:
- if (fieldFromInstruction32(Insn, 4, 1))
+ if (fieldFromInstruction(Insn, 4, 1))
return MCDisassembler::Fail; // UNDEFINED
- index = fieldFromInstruction32(Insn, 5, 3);
+ index = fieldFromInstruction(Insn, 5, 3);
break;
case 1:
- if (fieldFromInstruction32(Insn, 5, 1))
+ if (fieldFromInstruction(Insn, 5, 1))
return MCDisassembler::Fail; // UNDEFINED
- index = fieldFromInstruction32(Insn, 6, 2);
- if (fieldFromInstruction32(Insn, 4, 1))
+ index = fieldFromInstruction(Insn, 6, 2);
+ if (fieldFromInstruction(Insn, 4, 1))
align = 2;
break;
case 2:
- if (fieldFromInstruction32(Insn, 6, 1))
+ if (fieldFromInstruction(Insn, 6, 1))
return MCDisassembler::Fail; // UNDEFINED
- index = fieldFromInstruction32(Insn, 7, 1);
- if (fieldFromInstruction32(Insn, 4, 2) != 0)
- align = 4;
+ index = fieldFromInstruction(Insn, 7, 1);
+
+ switch (fieldFromInstruction(Insn, 4, 2)) {
+ case 0:
+ align = 0; break;
+ case 3:
+ align = 4; break;
+ default:
+ return MCDisassembler::Fail;
+ }
+ break;
}
if (Rm != 0xF) { // Writeback
}
-static DecodeStatus DecodeVLD2LN(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
- unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
- Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
- unsigned size = fieldFromInstruction32(Insn, 10, 2);
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned Rm = fieldFromInstruction(Insn, 0, 4);
+ unsigned Rd = fieldFromInstruction(Insn, 12, 4);
+ Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
+ unsigned size = fieldFromInstruction(Insn, 10, 2);
unsigned align = 0;
unsigned index = 0;
default:
return MCDisassembler::Fail;
case 0:
- index = fieldFromInstruction32(Insn, 5, 3);
- if (fieldFromInstruction32(Insn, 4, 1))
+ index = fieldFromInstruction(Insn, 5, 3);
+ if (fieldFromInstruction(Insn, 4, 1))
align = 2;
break;
case 1:
- index = fieldFromInstruction32(Insn, 6, 2);
- if (fieldFromInstruction32(Insn, 4, 1))
+ index = fieldFromInstruction(Insn, 6, 2);
+ if (fieldFromInstruction(Insn, 4, 1))
align = 4;
- if (fieldFromInstruction32(Insn, 5, 1))
+ if (fieldFromInstruction(Insn, 5, 1))
inc = 2;
break;
case 2:
- if (fieldFromInstruction32(Insn, 5, 1))
+ if (fieldFromInstruction(Insn, 5, 1))
return MCDisassembler::Fail; // UNDEFINED
- index = fieldFromInstruction32(Insn, 7, 1);
- if (fieldFromInstruction32(Insn, 4, 1) != 0)
+ index = fieldFromInstruction(Insn, 7, 1);
+ if (fieldFromInstruction(Insn, 4, 1) != 0)
align = 8;
- if (fieldFromInstruction32(Insn, 6, 1))
+ if (fieldFromInstruction(Insn, 6, 1))
inc = 2;
break;
}
return S;
}
-static DecodeStatus DecodeVST2LN(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
- unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
- Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
- unsigned size = fieldFromInstruction32(Insn, 10, 2);
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned Rm = fieldFromInstruction(Insn, 0, 4);
+ unsigned Rd = fieldFromInstruction(Insn, 12, 4);
+ Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
+ unsigned size = fieldFromInstruction(Insn, 10, 2);
unsigned align = 0;
unsigned index = 0;
default:
return MCDisassembler::Fail;
case 0:
- index = fieldFromInstruction32(Insn, 5, 3);
- if (fieldFromInstruction32(Insn, 4, 1))
+ index = fieldFromInstruction(Insn, 5, 3);
+ if (fieldFromInstruction(Insn, 4, 1))
align = 2;
break;
case 1:
- index = fieldFromInstruction32(Insn, 6, 2);
- if (fieldFromInstruction32(Insn, 4, 1))
+ index = fieldFromInstruction(Insn, 6, 2);
+ if (fieldFromInstruction(Insn, 4, 1))
align = 4;
- if (fieldFromInstruction32(Insn, 5, 1))
+ if (fieldFromInstruction(Insn, 5, 1))
inc = 2;
break;
case 2:
- if (fieldFromInstruction32(Insn, 5, 1))
+ if (fieldFromInstruction(Insn, 5, 1))
return MCDisassembler::Fail; // UNDEFINED
- index = fieldFromInstruction32(Insn, 7, 1);
- if (fieldFromInstruction32(Insn, 4, 1) != 0)
+ index = fieldFromInstruction(Insn, 7, 1);
+ if (fieldFromInstruction(Insn, 4, 1) != 0)
align = 8;
- if (fieldFromInstruction32(Insn, 6, 1))
+ if (fieldFromInstruction(Insn, 6, 1))
inc = 2;
break;
}
}
-static DecodeStatus DecodeVLD3LN(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
- unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
- Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
- unsigned size = fieldFromInstruction32(Insn, 10, 2);
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned Rm = fieldFromInstruction(Insn, 0, 4);
+ unsigned Rd = fieldFromInstruction(Insn, 12, 4);
+ Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
+ unsigned size = fieldFromInstruction(Insn, 10, 2);
unsigned align = 0;
unsigned index = 0;
default:
return MCDisassembler::Fail;
case 0:
- if (fieldFromInstruction32(Insn, 4, 1))
+ if (fieldFromInstruction(Insn, 4, 1))
return MCDisassembler::Fail; // UNDEFINED
- index = fieldFromInstruction32(Insn, 5, 3);
+ index = fieldFromInstruction(Insn, 5, 3);
break;
case 1:
- if (fieldFromInstruction32(Insn, 4, 1))
+ if (fieldFromInstruction(Insn, 4, 1))
return MCDisassembler::Fail; // UNDEFINED
- index = fieldFromInstruction32(Insn, 6, 2);
- if (fieldFromInstruction32(Insn, 5, 1))
+ index = fieldFromInstruction(Insn, 6, 2);
+ if (fieldFromInstruction(Insn, 5, 1))
inc = 2;
break;
case 2:
- if (fieldFromInstruction32(Insn, 4, 2))
+ if (fieldFromInstruction(Insn, 4, 2))
return MCDisassembler::Fail; // UNDEFINED
- index = fieldFromInstruction32(Insn, 7, 1);
- if (fieldFromInstruction32(Insn, 6, 1))
+ index = fieldFromInstruction(Insn, 7, 1);
+ if (fieldFromInstruction(Insn, 6, 1))
inc = 2;
break;
}
return S;
}
-static DecodeStatus DecodeVST3LN(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
- unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
- Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
- unsigned size = fieldFromInstruction32(Insn, 10, 2);
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned Rm = fieldFromInstruction(Insn, 0, 4);
+ unsigned Rd = fieldFromInstruction(Insn, 12, 4);
+ Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
+ unsigned size = fieldFromInstruction(Insn, 10, 2);
unsigned align = 0;
unsigned index = 0;
default:
return MCDisassembler::Fail;
case 0:
- if (fieldFromInstruction32(Insn, 4, 1))
+ if (fieldFromInstruction(Insn, 4, 1))
return MCDisassembler::Fail; // UNDEFINED
- index = fieldFromInstruction32(Insn, 5, 3);
+ index = fieldFromInstruction(Insn, 5, 3);
break;
case 1:
- if (fieldFromInstruction32(Insn, 4, 1))
+ if (fieldFromInstruction(Insn, 4, 1))
return MCDisassembler::Fail; // UNDEFINED
- index = fieldFromInstruction32(Insn, 6, 2);
- if (fieldFromInstruction32(Insn, 5, 1))
+ index = fieldFromInstruction(Insn, 6, 2);
+ if (fieldFromInstruction(Insn, 5, 1))
inc = 2;
break;
case 2:
- if (fieldFromInstruction32(Insn, 4, 2))
+ if (fieldFromInstruction(Insn, 4, 2))
return MCDisassembler::Fail; // UNDEFINED
- index = fieldFromInstruction32(Insn, 7, 1);
- if (fieldFromInstruction32(Insn, 6, 1))
+ index = fieldFromInstruction(Insn, 7, 1);
+ if (fieldFromInstruction(Insn, 6, 1))
inc = 2;
break;
}
}
-static DecodeStatus DecodeVLD4LN(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
- unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
- Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
- unsigned size = fieldFromInstruction32(Insn, 10, 2);
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned Rm = fieldFromInstruction(Insn, 0, 4);
+ unsigned Rd = fieldFromInstruction(Insn, 12, 4);
+ Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
+ unsigned size = fieldFromInstruction(Insn, 10, 2);
unsigned align = 0;
unsigned index = 0;
default:
return MCDisassembler::Fail;
case 0:
- if (fieldFromInstruction32(Insn, 4, 1))
+ if (fieldFromInstruction(Insn, 4, 1))
align = 4;
- index = fieldFromInstruction32(Insn, 5, 3);
+ index = fieldFromInstruction(Insn, 5, 3);
break;
case 1:
- if (fieldFromInstruction32(Insn, 4, 1))
+ if (fieldFromInstruction(Insn, 4, 1))
align = 8;
- index = fieldFromInstruction32(Insn, 6, 2);
- if (fieldFromInstruction32(Insn, 5, 1))
+ index = fieldFromInstruction(Insn, 6, 2);
+ if (fieldFromInstruction(Insn, 5, 1))
inc = 2;
break;
case 2:
- if (fieldFromInstruction32(Insn, 4, 2))
- align = 4 << fieldFromInstruction32(Insn, 4, 2);
- index = fieldFromInstruction32(Insn, 7, 1);
- if (fieldFromInstruction32(Insn, 6, 1))
+ switch (fieldFromInstruction(Insn, 4, 2)) {
+ case 0:
+ align = 0; break;
+ case 3:
+ return MCDisassembler::Fail;
+ default:
+ align = 4 << fieldFromInstruction(Insn, 4, 2); break;
+ }
+
+ index = fieldFromInstruction(Insn, 7, 1);
+ if (fieldFromInstruction(Insn, 6, 1))
inc = 2;
break;
}
return S;
}
-static DecodeStatus DecodeVST4LN(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
- unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
- Rd |= fieldFromInstruction32(Insn, 22, 1) << 4;
- unsigned size = fieldFromInstruction32(Insn, 10, 2);
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned Rm = fieldFromInstruction(Insn, 0, 4);
+ unsigned Rd = fieldFromInstruction(Insn, 12, 4);
+ Rd |= fieldFromInstruction(Insn, 22, 1) << 4;
+ unsigned size = fieldFromInstruction(Insn, 10, 2);
unsigned align = 0;
unsigned index = 0;
default:
return MCDisassembler::Fail;
case 0:
- if (fieldFromInstruction32(Insn, 4, 1))
+ if (fieldFromInstruction(Insn, 4, 1))
align = 4;
- index = fieldFromInstruction32(Insn, 5, 3);
+ index = fieldFromInstruction(Insn, 5, 3);
break;
case 1:
- if (fieldFromInstruction32(Insn, 4, 1))
+ if (fieldFromInstruction(Insn, 4, 1))
align = 8;
- index = fieldFromInstruction32(Insn, 6, 2);
- if (fieldFromInstruction32(Insn, 5, 1))
+ index = fieldFromInstruction(Insn, 6, 2);
+ if (fieldFromInstruction(Insn, 5, 1))
inc = 2;
break;
case 2:
- if (fieldFromInstruction32(Insn, 4, 2))
- align = 4 << fieldFromInstruction32(Insn, 4, 2);
- index = fieldFromInstruction32(Insn, 7, 1);
- if (fieldFromInstruction32(Insn, 6, 1))
+ switch (fieldFromInstruction(Insn, 4, 2)) {
+ case 0:
+ align = 0; break;
+ case 3:
+ return MCDisassembler::Fail;
+ default:
+ align = 4 << fieldFromInstruction(Insn, 4, 2); break;
+ }
+
+ index = fieldFromInstruction(Insn, 7, 1);
+ if (fieldFromInstruction(Insn, 6, 1))
inc = 2;
break;
}
return S;
}
-static DecodeStatus DecodeVMOVSRR(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
- unsigned Rt2 = fieldFromInstruction32(Insn, 16, 4);
- unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
- unsigned pred = fieldFromInstruction32(Insn, 28, 4);
- Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
+ unsigned Rt = fieldFromInstruction(Insn, 12, 4);
+ unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
+ unsigned Rm = fieldFromInstruction(Insn, 5, 1);
+ unsigned pred = fieldFromInstruction(Insn, 28, 4);
+ Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
S = MCDisassembler::SoftFail;
return S;
}
-static DecodeStatus DecodeVMOVRRS(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
- unsigned Rt2 = fieldFromInstruction32(Insn, 16, 4);
- unsigned Rm = fieldFromInstruction32(Insn, 0, 4);
- unsigned pred = fieldFromInstruction32(Insn, 28, 4);
- Rm |= fieldFromInstruction32(Insn, 5, 1) << 4;
+ unsigned Rt = fieldFromInstruction(Insn, 12, 4);
+ unsigned Rt2 = fieldFromInstruction(Insn, 16, 4);
+ unsigned Rm = fieldFromInstruction(Insn, 5, 1);
+ unsigned pred = fieldFromInstruction(Insn, 28, 4);
+ Rm |= fieldFromInstruction(Insn, 0, 4) << 1;
if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
S = MCDisassembler::SoftFail;
return S;
}
-static DecodeStatus DecodeIT(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeIT(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned pred = fieldFromInstruction16(Insn, 4, 4);
- // The InstPrinter needs to have the low bit of the predicate in
- // the mask operand to be able to print it properly.
- unsigned mask = fieldFromInstruction16(Insn, 0, 5);
+ unsigned pred = fieldFromInstruction(Insn, 4, 4);
+ unsigned mask = fieldFromInstruction(Insn, 0, 4);
if (pred == 0xF) {
pred = 0xE;
S = MCDisassembler::SoftFail;
}
- if ((mask & 0xF) == 0) {
- // Preserve the high bit of the mask, which is the low bit of
- // the predicate.
- mask &= 0x10;
- mask |= 0x8;
- S = MCDisassembler::SoftFail;
- }
+ if (mask == 0x0)
+ return MCDisassembler::Fail;
Inst.addOperand(MCOperand::CreateImm(pred));
Inst.addOperand(MCOperand::CreateImm(mask));
}
static DecodeStatus
-DecodeT2LDRDPreInstruction(llvm::MCInst &Inst, unsigned Insn,
+DecodeT2LDRDPreInstruction(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
- unsigned Rt2 = fieldFromInstruction32(Insn, 8, 4);
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned addr = fieldFromInstruction32(Insn, 0, 8);
- unsigned W = fieldFromInstruction32(Insn, 21, 1);
- unsigned U = fieldFromInstruction32(Insn, 23, 1);
- unsigned P = fieldFromInstruction32(Insn, 24, 1);
+ unsigned Rt = fieldFromInstruction(Insn, 12, 4);
+ unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned addr = fieldFromInstruction(Insn, 0, 8);
+ unsigned W = fieldFromInstruction(Insn, 21, 1);
+ unsigned U = fieldFromInstruction(Insn, 23, 1);
+ unsigned P = fieldFromInstruction(Insn, 24, 1);
bool writeback = (W == 1) | (P == 0);
addr |= (U << 8) | (Rn << 9);
}
static DecodeStatus
-DecodeT2STRDPreInstruction(llvm::MCInst &Inst, unsigned Insn,
+DecodeT2STRDPreInstruction(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
- unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
- unsigned Rt2 = fieldFromInstruction32(Insn, 8, 4);
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned addr = fieldFromInstruction32(Insn, 0, 8);
- unsigned W = fieldFromInstruction32(Insn, 21, 1);
- unsigned U = fieldFromInstruction32(Insn, 23, 1);
- unsigned P = fieldFromInstruction32(Insn, 24, 1);
+ unsigned Rt = fieldFromInstruction(Insn, 12, 4);
+ unsigned Rt2 = fieldFromInstruction(Insn, 8, 4);
+ unsigned Rn = fieldFromInstruction(Insn, 16, 4);
+ unsigned addr = fieldFromInstruction(Insn, 0, 8);
+ unsigned W = fieldFromInstruction(Insn, 21, 1);
+ unsigned U = fieldFromInstruction(Insn, 23, 1);
+ unsigned P = fieldFromInstruction(Insn, 24, 1);
bool writeback = (W == 1) | (P == 0);
addr |= (U << 8) | (Rn << 9);
return S;
}
-static DecodeStatus DecodeT2Adr(llvm::MCInst &Inst, uint32_t Insn,
+static DecodeStatus DecodeT2Adr(MCInst &Inst, uint32_t Insn,
uint64_t Address, const void *Decoder) {
- unsigned sign1 = fieldFromInstruction32(Insn, 21, 1);
- unsigned sign2 = fieldFromInstruction32(Insn, 23, 1);
+ unsigned sign1 = fieldFromInstruction(Insn, 21, 1);
+ unsigned sign2 = fieldFromInstruction(Insn, 23, 1);
if (sign1 != sign2) return MCDisassembler::Fail;
- unsigned Val = fieldFromInstruction32(Insn, 0, 8);
- Val |= fieldFromInstruction32(Insn, 12, 3) << 8;
- Val |= fieldFromInstruction32(Insn, 26, 1) << 11;
+ unsigned Val = fieldFromInstruction(Insn, 0, 8);
+ Val |= fieldFromInstruction(Insn, 12, 3) << 8;
+ Val |= fieldFromInstruction(Insn, 26, 1) << 11;
Val |= sign1 << 12;
Inst.addOperand(MCOperand::CreateImm(SignExtend32<13>(Val)));
return MCDisassembler::Success;
}
-static DecodeStatus DecodeT2ShifterImmOperand(llvm::MCInst &Inst, uint32_t Val,
+static DecodeStatus DecodeT2ShifterImmOperand(MCInst &Inst, uint32_t Val,
uint64_t Address,
const void *Decoder) {
DecodeStatus S = MCDisassembler::Success;
// Shift of "asr #32" is not allowed in Thumb2 mode.
- if (Val == 0x20) S = MCDisassembler::SoftFail;
+ if (Val == 0x20) S = MCDisassembler::Fail;
Inst.addOperand(MCOperand::CreateImm(Val));
return S;
}
-static DecodeStatus DecodeSwap(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
- unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
- unsigned Rt2 = fieldFromInstruction32(Insn, 0, 4);
- unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
- unsigned pred = fieldFromInstruction32(Insn, 28, 4);
+ unsigned Rt = fieldFromInstruction(Insn, 12, 4);
+ unsigned Rt2 = 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);
DecodeStatus S = MCDisassembler::Success;
+
+ if (Rt == Rn || Rn == Rt2)
+ S = MCDisassembler::SoftFail;
+
if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
return MCDisassembler::Fail;
if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
return S;
}
-static DecodeStatus DecodeVCVTD(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
- unsigned Vd = (fieldFromInstruction32(Insn, 12, 4) << 0);
- Vd |= (fieldFromInstruction32(Insn, 22, 1) << 4);
- unsigned Vm = (fieldFromInstruction32(Insn, 0, 4) << 0);
- Vm |= (fieldFromInstruction32(Insn, 5, 1) << 4);
- unsigned imm = fieldFromInstruction32(Insn, 16, 6);
- unsigned cmode = fieldFromInstruction32(Insn, 8, 4);
+ unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
+ Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
+ unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
+ 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;
return S;
}
-static DecodeStatus DecodeVCVTQ(llvm::MCInst &Inst, unsigned Insn,
+static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
uint64_t Address, const void *Decoder) {
- unsigned Vd = (fieldFromInstruction32(Insn, 12, 4) << 0);
- Vd |= (fieldFromInstruction32(Insn, 22, 1) << 4);
- unsigned Vm = (fieldFromInstruction32(Insn, 0, 4) << 0);
- Vm |= (fieldFromInstruction32(Insn, 5, 1) << 4);
- unsigned imm = fieldFromInstruction32(Insn, 16, 6);
- unsigned cmode = fieldFromInstruction32(Insn, 8, 4);
+ unsigned Vd = (fieldFromInstruction(Insn, 12, 4) << 0);
+ Vd |= (fieldFromInstruction(Insn, 22, 1) << 4);
+ unsigned Vm = (fieldFromInstruction(Insn, 0, 4) << 0);
+ 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 DecodeLDR(MCInst &Inst, unsigned Val,
+ uint64_t Address, const void *Decoder) {
+ DecodeStatus S = MCDisassembler::Success;
+
+ unsigned Rn = fieldFromInstruction(Val, 16, 4);
+ unsigned Rt = fieldFromInstruction(Val, 12, 4);
+ unsigned Rm = fieldFromInstruction(Val, 0, 4);
+ Rm |= (fieldFromInstruction(Val, 23, 1) << 4);
+ unsigned Cond = fieldFromInstruction(Val, 28, 4);
+
+ if (fieldFromInstruction(Val, 8, 4) != 0 || Rn == Rt)
+ S = MCDisassembler::SoftFail;
+
+ if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
+ return MCDisassembler::Fail;
+ if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
+ return MCDisassembler::Fail;
+ if (!Check(S, DecodeAddrMode7Operand(Inst, Rn, Address, Decoder)))
+ return MCDisassembler::Fail;
+ if (!Check(S, DecodePostIdxReg(Inst, Rm, Address, Decoder)))
+ return MCDisassembler::Fail;
+ if (!Check(S, DecodePredicateOperand(Inst, Cond, Address, Decoder)))
+ return MCDisassembler::Fail;
+
+ return S;
+}
+
+static DecodeStatus DecodeMRRC2(llvm::MCInst &Inst, unsigned Val,
+ uint64_t Address, const void *Decoder) {
+
+ DecodeStatus S = MCDisassembler::Success;
+
+ unsigned CRm = fieldFromInstruction(Val, 0, 4);
+ unsigned opc1 = fieldFromInstruction(Val, 4, 4);
+ unsigned cop = fieldFromInstruction(Val, 8, 4);
+ unsigned Rt = fieldFromInstruction(Val, 12, 4);
+ unsigned Rt2 = fieldFromInstruction(Val, 16, 4);
+
+ if ((cop & ~0x1) == 0xa)
+ return MCDisassembler::Fail;
+
+ if (Rt == Rt2)
+ S = MCDisassembler::SoftFail;
+
+ Inst.addOperand(MCOperand::CreateImm(cop));
+ Inst.addOperand(MCOperand::CreateImm(opc1));
+ if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
+ return MCDisassembler::Fail;
+ if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
+ return MCDisassembler::Fail;
+ Inst.addOperand(MCOperand::CreateImm(CRm));
+
+ return S;
+}
+
projects / oota-llvm.git / blobdiff