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3610a15c35
SignExtend32<22>(Val<<1) also needs to change to SignExtend32<21>(Val) . git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156213 91177308-0d34-0410-b5e6-96231b3b80d8
4505 lines
152 KiB
C++
4505 lines
152 KiB
C++
//===-- ARMDisassembler.cpp - Disassembler for ARM/Thumb ISA --------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#define DEBUG_TYPE "arm-disassembler"
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#include "MCTargetDesc/ARMAddressingModes.h"
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#include "MCTargetDesc/ARMMCExpr.h"
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#include "MCTargetDesc/ARMBaseInfo.h"
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#include "llvm/MC/EDInstInfo.h"
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#include "llvm/MC/MCInst.h"
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#include "llvm/MC/MCInstrDesc.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCDisassembler.h"
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#include "llvm/MC/MCSubtargetInfo.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/MemoryObject.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/TargetRegistry.h"
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#include "llvm/Support/raw_ostream.h"
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#include <vector>
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using namespace llvm;
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typedef MCDisassembler::DecodeStatus DecodeStatus;
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namespace {
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// Handles the condition code status of instructions in IT blocks
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class ITStatus
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{
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public:
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// Returns the condition code for instruction in IT block
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unsigned getITCC() {
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unsigned CC = ARMCC::AL;
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if (instrInITBlock())
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CC = ITStates.back();
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return CC;
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}
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// Advances the IT block state to the next T or E
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void advanceITState() {
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ITStates.pop_back();
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}
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// Returns true if the current instruction is in an IT block
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bool instrInITBlock() {
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return !ITStates.empty();
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}
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// Returns true if current instruction is the last instruction in an IT block
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bool instrLastInITBlock() {
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return ITStates.size() == 1;
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}
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// Called when decoding an IT instruction. Sets the IT state for the following
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// instructions that for the IT block. Firstcond and Mask correspond to the
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// fields in the IT instruction encoding.
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void setITState(char Firstcond, char Mask) {
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// (3 - the number of trailing zeros) is the number of then / else.
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unsigned CondBit0 = Firstcond & 1;
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unsigned NumTZ = CountTrailingZeros_32(Mask);
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unsigned char CCBits = static_cast<unsigned char>(Firstcond & 0xf);
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assert(NumTZ <= 3 && "Invalid IT mask!");
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// push condition codes onto the stack the correct order for the pops
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for (unsigned Pos = NumTZ+1; Pos <= 3; ++Pos) {
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bool T = ((Mask >> Pos) & 1) == CondBit0;
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if (T)
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ITStates.push_back(CCBits);
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else
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ITStates.push_back(CCBits ^ 1);
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}
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ITStates.push_back(CCBits);
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}
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private:
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std::vector<unsigned char> ITStates;
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};
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}
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namespace {
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/// ARMDisassembler - ARM disassembler for all ARM platforms.
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class ARMDisassembler : public MCDisassembler {
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public:
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/// Constructor - Initializes the disassembler.
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///
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ARMDisassembler(const MCSubtargetInfo &STI) :
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MCDisassembler(STI) {
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}
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~ARMDisassembler() {
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}
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/// getInstruction - See MCDisassembler.
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DecodeStatus getInstruction(MCInst &instr,
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uint64_t &size,
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const MemoryObject ®ion,
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uint64_t address,
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raw_ostream &vStream,
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raw_ostream &cStream) const;
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/// getEDInfo - See MCDisassembler.
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const EDInstInfo *getEDInfo() const;
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private:
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};
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/// ThumbDisassembler - Thumb disassembler for all Thumb platforms.
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class ThumbDisassembler : public MCDisassembler {
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public:
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/// Constructor - Initializes the disassembler.
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///
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ThumbDisassembler(const MCSubtargetInfo &STI) :
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MCDisassembler(STI) {
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}
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~ThumbDisassembler() {
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}
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/// getInstruction - See MCDisassembler.
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DecodeStatus getInstruction(MCInst &instr,
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uint64_t &size,
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const MemoryObject ®ion,
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uint64_t address,
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raw_ostream &vStream,
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raw_ostream &cStream) const;
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/// getEDInfo - See MCDisassembler.
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const EDInstInfo *getEDInfo() const;
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private:
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mutable ITStatus ITBlock;
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DecodeStatus AddThumbPredicate(MCInst&) const;
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void UpdateThumbVFPPredicate(MCInst&) const;
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};
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}
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static bool Check(DecodeStatus &Out, DecodeStatus In) {
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switch (In) {
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case MCDisassembler::Success:
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// Out stays the same.
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return true;
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case MCDisassembler::SoftFail:
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Out = In;
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return true;
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case MCDisassembler::Fail:
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Out = In;
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return false;
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}
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llvm_unreachable("Invalid DecodeStatus!");
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}
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// Forward declare these because the autogenerated code will reference them.
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// Definitions are further down.
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static DecodeStatus DecodeGPRRegisterClass(MCInst &Inst, unsigned RegNo,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeGPRnopcRegisterClass(MCInst &Inst,
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unsigned RegNo, uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecoderGPRRegisterClass(MCInst &Inst, unsigned RegNo,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeDPR_VFP2RegisterClass(MCInst &Inst,
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unsigned RegNo,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
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unsigned RegNo, uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodePredicateOperand(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeSOImmOperand(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeBitfieldMaskOperand(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeCopMemInstruction(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeAddrMode2IdxInstruction(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeSORegMemOperand(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeAddrMode3Instruction(MCInst &Inst,unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeSORegRegOperand(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst & Inst,
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unsigned Insn,
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uint64_t Adddress,
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const void *Decoder);
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static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeArmMOVTWInstruction(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeSMLAInstruction(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeCPSInstruction(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeT2CPSInstruction(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeAddrModeImm12Operand(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeAddrMode5Operand(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeBranchImmInstruction(MCInst &Inst,unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeAddrMode6Operand(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVLDInstruction(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVSTInstruction(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVLD1DupInstruction(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVLD2DupInstruction(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVLD3DupInstruction(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVLD4DupInstruction(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeNEONModImmInstruction(MCInst &Inst,unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVSHLMaxInstruction(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeShiftRight8Imm(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeShiftRight16Imm(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeShiftRight32Imm(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeShiftRight64Imm(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeTBLInstruction(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodePostIdxReg(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeMSRMask(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeDoubleRegLoad(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeLDRPreImm(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeLDRPreReg(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeSTRPreImm(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeSTRPreReg(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVLD1LN(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVLD2LN(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVLD3LN(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVLD4LN(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVST1LN(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVST2LN(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVST3LN(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVST4LN(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVMOVSRR(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVMOVRRS(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeSwap(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVCVTD(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVCVTQ(MCInst &Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeThumbAddSpecialReg(MCInst &Inst, uint16_t Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeT2BROperand(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeThumbCmpBROperand(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeThumbAddrModeRR(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeThumbAddrModeIS(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeThumbAddrModeSP(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeT2AddrModeSOReg(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeT2Imm8S4(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeT2AddrModeImm8s4(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst &Inst,unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeT2AddrModeImm8(MCInst &Inst, unsigned Val,
|
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uint64_t Address, const void *Decoder);
|
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static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Val,
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||
uint64_t Address, const void *Decoder);
|
||
static DecodeStatus DecodeThumbAddSPReg(MCInst &Inst, uint16_t Insn,
|
||
uint64_t Address, const void *Decoder);
|
||
static DecodeStatus DecodeThumbCPS(MCInst &Inst, uint16_t Insn,
|
||
uint64_t Address, const void *Decoder);
|
||
static DecodeStatus DecodeThumbBLXOffset(MCInst &Inst, unsigned Insn,
|
||
uint64_t Address, const void *Decoder);
|
||
static DecodeStatus DecodeT2AddrModeImm12(MCInst &Inst, unsigned Val,
|
||
uint64_t Address, const void *Decoder);
|
||
static DecodeStatus DecodeThumbTableBranch(MCInst &Inst, unsigned Val,
|
||
uint64_t Address, const void *Decoder);
|
||
static DecodeStatus DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Val,
|
||
uint64_t Address, const void *Decoder);
|
||
static DecodeStatus DecodeT2SOImm(MCInst &Inst, unsigned Val,
|
||
uint64_t Address, const void *Decoder);
|
||
static DecodeStatus DecodeThumbBCCTargetOperand(MCInst &Inst,unsigned Val,
|
||
uint64_t Address, const void *Decoder);
|
||
static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
|
||
uint64_t Address, const void *Decoder);
|
||
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(MCInst &Inst,unsigned Insn,
|
||
uint64_t Address, const void *Decoder);
|
||
static DecodeStatus DecodeT2Adr(MCInst &Inst, unsigned Val,
|
||
uint64_t Address, const void *Decoder);
|
||
static DecodeStatus DecodeT2LdStPre(MCInst &Inst, unsigned Val,
|
||
uint64_t Address, const void *Decoder);
|
||
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);
|
||
}
|
||
|
||
const EDInstInfo *ARMDisassembler::getEDInfo() const {
|
||
return instInfoARM;
|
||
}
|
||
|
||
const EDInstInfo *ThumbDisassembler::getEDInfo() const {
|
||
return instInfoARM;
|
||
}
|
||
|
||
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];
|
||
|
||
assert(!(STI.getFeatureBits() & ARM::ModeThumb) &&
|
||
"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) {
|
||
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);
|
||
|
||
// Calling the auto-generated decoder function.
|
||
DecodeStatus result = decodeARMInstruction32(MI, insn, Address, this, STI);
|
||
if (result != MCDisassembler::Fail) {
|
||
Size = 4;
|
||
return 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) {
|
||
Size = 4;
|
||
return result;
|
||
}
|
||
|
||
MI.clear();
|
||
result = decodeNEONDataInstruction32(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;
|
||
}
|
||
|
||
MI.clear();
|
||
result = decodeNEONLoadStoreInstruction32(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;
|
||
}
|
||
|
||
MI.clear();
|
||
result = decodeNEONDupInstruction32(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;
|
||
}
|
||
|
||
MI.clear();
|
||
|
||
Size = 0;
|
||
return MCDisassembler::Fail;
|
||
}
|
||
|
||
namespace llvm {
|
||
extern const MCInstrDesc ARMInsts[];
|
||
}
|
||
|
||
/// tryAddingSymbolicOperand - trys to add a symbolic operand in place of the
|
||
/// immediate Value in the MCInst. The immediate Value has had any PC
|
||
/// adjustment made by the caller. If the instruction is a branch instruction
|
||
/// then isBranch is true, else false. If the getOpInfo() function was set as
|
||
/// part of the setupForSymbolicDisassembly() call then that function is called
|
||
/// to get any symbolic information at the Address for this instruction. If
|
||
/// that returns non-zero then the symbolic information it returns is used to
|
||
/// create an MCExpr and that is added as an operand to the MCInst. If
|
||
/// getOpInfo() returns zero and isBranch is true then a symbol look up for
|
||
/// Value is done and if a symbol is found an MCExpr is created with that, else
|
||
/// an MCExpr with Value is created. This function returns true if it adds an
|
||
/// operand to the MCInst and false otherwise.
|
||
static bool tryAddingSymbolicOperand(uint64_t Address, int32_t Value,
|
||
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;
|
||
}
|
||
|
||
/// tryAddingPcLoadReferenceComment - trys to add a comment as to what is being
|
||
/// referenced by a load instruction with the base register that is the Pc.
|
||
/// 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
|
||
/// 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;
|
||
}
|
||
}
|
||
|
||
// Thumb1 instructions don't have explicit S bits. Rather, they
|
||
// implicitly set CPSR. Since it's not represented in the encoding, the
|
||
// auto-generated decoder won't inject the CPSR operand. We need to fix
|
||
// that as a post-pass.
|
||
static void AddThumb1SBit(MCInst &MI, bool InITBlock) {
|
||
const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
|
||
unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
|
||
MCInst::iterator I = MI.begin();
|
||
for (unsigned i = 0; i < NumOps; ++i, ++I) {
|
||
if (I == MI.end()) break;
|
||
if (OpInfo[i].isOptionalDef() && OpInfo[i].RegClass == ARM::CCRRegClassID) {
|
||
if (i > 0 && OpInfo[i-1].isPredicate()) continue;
|
||
MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
|
||
return;
|
||
}
|
||
}
|
||
|
||
MI.insert(I, MCOperand::CreateReg(InITBlock ? 0 : ARM::CPSR));
|
||
}
|
||
|
||
// Most Thumb instructions don't have explicit predicates in the
|
||
// encoding, but rather get their predicates from IT context. We need
|
||
// to fix up the predicate operands using this context information as a
|
||
// post-pass.
|
||
MCDisassembler::DecodeStatus
|
||
ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
|
||
MCDisassembler::DecodeStatus S = Success;
|
||
|
||
// A few instructions actually have predicates encoded in them. Don't
|
||
// try to overwrite it if we're seeing one of those.
|
||
switch (MI.getOpcode()) {
|
||
case ARM::tBcc:
|
||
case ARM::t2Bcc:
|
||
case ARM::tCBZ:
|
||
case ARM::tCBNZ:
|
||
case ARM::tCPS:
|
||
case ARM::t2CPS3p:
|
||
case ARM::t2CPS2p:
|
||
case ARM::t2CPS1p:
|
||
case ARM::tMOVSr:
|
||
case ARM::tSETEND:
|
||
// Some instructions (mostly conditional branches) are not
|
||
// allowed in IT blocks.
|
||
if (ITBlock.instrInITBlock())
|
||
S = SoftFail;
|
||
else
|
||
return Success;
|
||
break;
|
||
case ARM::tB:
|
||
case ARM::t2B:
|
||
case ARM::t2TBB:
|
||
case ARM::t2TBH:
|
||
// Some instructions (mostly unconditional branches) can
|
||
// only appears at the end of, or outside of, an IT.
|
||
if (ITBlock.instrInITBlock() && !ITBlock.instrLastInITBlock())
|
||
S = SoftFail;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
// If we're in an IT block, base the predicate on that. Otherwise,
|
||
// assume a predicate of AL.
|
||
unsigned CC;
|
||
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;
|
||
MCInst::iterator I = MI.begin();
|
||
for (unsigned i = 0; i < NumOps; ++i, ++I) {
|
||
if (I == MI.end()) break;
|
||
if (OpInfo[i].isPredicate()) {
|
||
I = MI.insert(I, MCOperand::CreateImm(CC));
|
||
++I;
|
||
if (CC == ARMCC::AL)
|
||
MI.insert(I, MCOperand::CreateReg(0));
|
||
else
|
||
MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
|
||
return S;
|
||
}
|
||
}
|
||
|
||
I = MI.insert(I, MCOperand::CreateImm(CC));
|
||
++I;
|
||
if (CC == ARMCC::AL)
|
||
MI.insert(I, MCOperand::CreateReg(0));
|
||
else
|
||
MI.insert(I, MCOperand::CreateReg(ARM::CPSR));
|
||
|
||
return S;
|
||
}
|
||
|
||
// Thumb VFP instructions are a special case. Because we share their
|
||
// encodings between ARM and Thumb modes, and they are predicable in ARM
|
||
// mode, the auto-generated decoder will give them an (incorrect)
|
||
// predicate operand. We need to rewrite these operands based on the IT
|
||
// context as a post-pass.
|
||
void ThumbDisassembler::UpdateThumbVFPPredicate(MCInst &MI) const {
|
||
unsigned CC;
|
||
CC = ITBlock.getITCC();
|
||
if (ITBlock.instrInITBlock())
|
||
ITBlock.advanceITState();
|
||
|
||
const MCOperandInfo *OpInfo = ARMInsts[MI.getOpcode()].OpInfo;
|
||
MCInst::iterator I = MI.begin();
|
||
unsigned short NumOps = ARMInsts[MI.getOpcode()].NumOperands;
|
||
for (unsigned i = 0; i < NumOps; ++i, ++I) {
|
||
if (OpInfo[i].isPredicate() ) {
|
||
I->setImm(CC);
|
||
++I;
|
||
if (CC == ARMCC::AL)
|
||
I->setReg(0);
|
||
else
|
||
I->setReg(ARM::CPSR);
|
||
return;
|
||
}
|
||
}
|
||
}
|
||
|
||
DecodeStatus ThumbDisassembler::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];
|
||
|
||
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) {
|
||
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) {
|
||
Size = 2;
|
||
Check(result, AddThumbPredicate(MI));
|
||
return result;
|
||
}
|
||
|
||
MI.clear();
|
||
result = decodeThumbSBitInstruction16(MI, insn16, Address, this, STI);
|
||
if (result) {
|
||
Size = 2;
|
||
bool InITBlock = ITBlock.instrInITBlock();
|
||
Check(result, AddThumbPredicate(MI));
|
||
AddThumb1SBit(MI, InITBlock);
|
||
return result;
|
||
}
|
||
|
||
MI.clear();
|
||
result = decodeThumb2Instruction16(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.instrInITBlock())
|
||
result = MCDisassembler::SoftFail;
|
||
|
||
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) {
|
||
|
||
unsigned Firstcond = MI.getOperand(0).getImm();
|
||
unsigned Mask = MI.getOperand(1).getImm();
|
||
ITBlock.setITState(Firstcond, Mask);
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
// We want to read exactly 4 bytes of data.
|
||
if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
|
||
Size = 0;
|
||
return MCDisassembler::Fail;
|
||
}
|
||
|
||
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) {
|
||
Size = 4;
|
||
bool InITBlock = ITBlock.instrInITBlock();
|
||
Check(result, AddThumbPredicate(MI));
|
||
AddThumb1SBit(MI, InITBlock);
|
||
return result;
|
||
}
|
||
|
||
MI.clear();
|
||
result = decodeThumb2Instruction32(MI, insn32, Address, this, STI);
|
||
if (result != MCDisassembler::Fail) {
|
||
Size = 4;
|
||
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;
|
||
}
|
||
|
||
MI.clear();
|
||
result = decodeNEONDupInstruction32(MI, insn32, Address, this, STI);
|
||
if (result != MCDisassembler::Fail) {
|
||
Size = 4;
|
||
Check(result, AddThumbPredicate(MI));
|
||
return result;
|
||
}
|
||
|
||
if (fieldFromInstruction32(insn32, 24, 8) == 0xF9) {
|
||
MI.clear();
|
||
uint32_t NEONLdStInsn = insn32;
|
||
NEONLdStInsn &= 0xF0FFFFFF;
|
||
NEONLdStInsn |= 0x04000000;
|
||
result = decodeNEONLoadStoreInstruction32(MI, NEONLdStInsn, Address, this, STI);
|
||
if (result != MCDisassembler::Fail) {
|
||
Size = 4;
|
||
Check(result, AddThumbPredicate(MI));
|
||
return result;
|
||
}
|
||
}
|
||
|
||
if (fieldFromInstruction32(insn32, 24, 4) == 0xF) {
|
||
MI.clear();
|
||
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) {
|
||
Size = 4;
|
||
Check(result, AddThumbPredicate(MI));
|
||
return result;
|
||
}
|
||
}
|
||
|
||
Size = 0;
|
||
return MCDisassembler::Fail;
|
||
}
|
||
|
||
|
||
extern "C" void LLVMInitializeARMDisassembler() {
|
||
TargetRegistry::RegisterMCDisassembler(TheARMTarget,
|
||
createARMDisassembler);
|
||
TargetRegistry::RegisterMCDisassembler(TheThumbTarget,
|
||
createThumbDisassembler);
|
||
}
|
||
|
||
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(MCInst &Inst, unsigned RegNo,
|
||
uint64_t Address, const void *Decoder) {
|
||
if (RegNo > 15)
|
||
return MCDisassembler::Fail;
|
||
|
||
unsigned Register = GPRDecoderTable[RegNo];
|
||
Inst.addOperand(MCOperand::CreateReg(Register));
|
||
return MCDisassembler::Success;
|
||
}
|
||
|
||
static DecodeStatus
|
||
DecodeGPRnopcRegisterClass(MCInst &Inst, unsigned RegNo,
|
||
uint64_t Address, const void *Decoder) {
|
||
DecodeStatus S = MCDisassembler::Success;
|
||
|
||
if (RegNo == 15)
|
||
S = MCDisassembler::SoftFail;
|
||
|
||
Check(S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
|
||
|
||
return S;
|
||
}
|
||
|
||
static DecodeStatus DecodetGPRRegisterClass(MCInst &Inst, unsigned RegNo,
|
||
uint64_t Address, const void *Decoder) {
|
||
if (RegNo > 7)
|
||
return MCDisassembler::Fail;
|
||
return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
|
||
}
|
||
|
||
static DecodeStatus DecodetcGPRRegisterClass(MCInst &Inst, unsigned RegNo,
|
||
uint64_t Address, const void *Decoder) {
|
||
unsigned Register = 0;
|
||
switch (RegNo) {
|
||
case 0:
|
||
Register = ARM::R0;
|
||
break;
|
||
case 1:
|
||
Register = ARM::R1;
|
||
break;
|
||
case 2:
|
||
Register = ARM::R2;
|
||
break;
|
||
case 3:
|
||
Register = ARM::R3;
|
||
break;
|
||
case 9:
|
||
Register = ARM::R9;
|
||
break;
|
||
case 12:
|
||
Register = ARM::R12;
|
||
break;
|
||
default:
|
||
return MCDisassembler::Fail;
|
||
}
|
||
|
||
Inst.addOperand(MCOperand::CreateReg(Register));
|
||
return MCDisassembler::Success;
|
||
}
|
||
|
||
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);
|
||
}
|
||
|
||
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::S12, ARM::S13, ARM::S14, ARM::S15,
|
||
ARM::S16, ARM::S17, ARM::S18, ARM::S19,
|
||
ARM::S20, ARM::S21, ARM::S22, ARM::S23,
|
||
ARM::S24, ARM::S25, ARM::S26, ARM::S27,
|
||
ARM::S28, ARM::S29, ARM::S30, ARM::S31
|
||
};
|
||
|
||
static DecodeStatus DecodeSPRRegisterClass(MCInst &Inst, unsigned RegNo,
|
||
uint64_t Address, const void *Decoder) {
|
||
if (RegNo > 31)
|
||
return MCDisassembler::Fail;
|
||
|
||
unsigned Register = SPRDecoderTable[RegNo];
|
||
Inst.addOperand(MCOperand::CreateReg(Register));
|
||
return MCDisassembler::Success;
|
||
}
|
||
|
||
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::D12, ARM::D13, ARM::D14, ARM::D15,
|
||
ARM::D16, ARM::D17, ARM::D18, ARM::D19,
|
||
ARM::D20, ARM::D21, ARM::D22, ARM::D23,
|
||
ARM::D24, ARM::D25, ARM::D26, ARM::D27,
|
||
ARM::D28, ARM::D29, ARM::D30, ARM::D31
|
||
};
|
||
|
||
static DecodeStatus DecodeDPRRegisterClass(MCInst &Inst, unsigned RegNo,
|
||
uint64_t Address, const void *Decoder) {
|
||
if (RegNo > 31)
|
||
return MCDisassembler::Fail;
|
||
|
||
unsigned Register = DPRDecoderTable[RegNo];
|
||
Inst.addOperand(MCOperand::CreateReg(Register));
|
||
return MCDisassembler::Success;
|
||
}
|
||
|
||
static DecodeStatus DecodeDPR_8RegisterClass(MCInst &Inst, unsigned RegNo,
|
||
uint64_t Address, const void *Decoder) {
|
||
if (RegNo > 7)
|
||
return MCDisassembler::Fail;
|
||
return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
|
||
}
|
||
|
||
static DecodeStatus
|
||
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 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,
|
||
ARM::Q12, ARM::Q13, ARM::Q14, ARM::Q15
|
||
};
|
||
|
||
|
||
static DecodeStatus DecodeQPRRegisterClass(MCInst &Inst, unsigned RegNo,
|
||
uint64_t Address, const void *Decoder) {
|
||
if (RegNo > 31)
|
||
return MCDisassembler::Fail;
|
||
RegNo >>= 1;
|
||
|
||
unsigned Register = QPRDecoderTable[RegNo];
|
||
Inst.addOperand(MCOperand::CreateReg(Register));
|
||
return MCDisassembler::Success;
|
||
}
|
||
|
||
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::Q9, ARM::D19_D20, ARM::Q10, ARM::D21_D22, ARM::Q11, ARM::D23_D24,
|
||
ARM::Q12, ARM::D25_D26, ARM::Q13, ARM::D27_D28, ARM::Q14, ARM::D29_D30,
|
||
ARM::Q15
|
||
};
|
||
|
||
static DecodeStatus DecodeDPairRegisterClass(MCInst &Inst, unsigned RegNo,
|
||
uint64_t Address, const void *Decoder) {
|
||
if (RegNo > 30)
|
||
return MCDisassembler::Fail;
|
||
|
||
unsigned Register = DPairDecoderTable[RegNo];
|
||
Inst.addOperand(MCOperand::CreateReg(Register));
|
||
return MCDisassembler::Success;
|
||
}
|
||
|
||
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::D12_D14, ARM::D13_D15, ARM::D14_D16, ARM::D15_D17,
|
||
ARM::D16_D18, ARM::D17_D19, ARM::D18_D20, ARM::D19_D21,
|
||
ARM::D20_D22, ARM::D21_D23, ARM::D22_D24, ARM::D23_D25,
|
||
ARM::D24_D26, ARM::D25_D27, ARM::D26_D28, ARM::D27_D29,
|
||
ARM::D28_D30, ARM::D29_D31
|
||
};
|
||
|
||
static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst &Inst,
|
||
unsigned RegNo,
|
||
uint64_t Address,
|
||
const void *Decoder) {
|
||
if (RegNo > 29)
|
||
return MCDisassembler::Fail;
|
||
|
||
unsigned Register = DPairSpacedDecoderTable[RegNo];
|
||
Inst.addOperand(MCOperand::CreateReg(Register));
|
||
return MCDisassembler::Success;
|
||
}
|
||
|
||
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.
|
||
if (Inst.getOpcode() == ARM::tBcc && Val == 0xE)
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(Val));
|
||
if (Val == ARMCC::AL) {
|
||
Inst.addOperand(MCOperand::CreateReg(0));
|
||
} else
|
||
Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
|
||
return MCDisassembler::Success;
|
||
}
|
||
|
||
static DecodeStatus DecodeCCOutOperand(MCInst &Inst, unsigned Val,
|
||
uint64_t Address, const void *Decoder) {
|
||
if (Val)
|
||
Inst.addOperand(MCOperand::CreateReg(ARM::CPSR));
|
||
else
|
||
Inst.addOperand(MCOperand::CreateReg(0));
|
||
return MCDisassembler::Success;
|
||
}
|
||
|
||
static DecodeStatus DecodeSOImmOperand(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(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);
|
||
|
||
// Register-immediate
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
|
||
switch (type) {
|
||
case 0:
|
||
Shift = ARM_AM::lsl;
|
||
break;
|
||
case 1:
|
||
Shift = ARM_AM::lsr;
|
||
break;
|
||
case 2:
|
||
Shift = ARM_AM::asr;
|
||
break;
|
||
case 3:
|
||
Shift = ARM_AM::ror;
|
||
break;
|
||
}
|
||
|
||
if (Shift == ARM_AM::ror && imm == 0)
|
||
Shift = ARM_AM::rrx;
|
||
|
||
unsigned Op = Shift | (imm << 3);
|
||
Inst.addOperand(MCOperand::CreateImm(Op));
|
||
|
||
return S;
|
||
}
|
||
|
||
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);
|
||
|
||
// Register-register
|
||
if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
ARM_AM::ShiftOpc Shift = ARM_AM::lsl;
|
||
switch (type) {
|
||
case 0:
|
||
Shift = ARM_AM::lsl;
|
||
break;
|
||
case 1:
|
||
Shift = ARM_AM::lsr;
|
||
break;
|
||
case 2:
|
||
Shift = ARM_AM::asr;
|
||
break;
|
||
case 3:
|
||
Shift = ARM_AM::ror;
|
||
break;
|
||
}
|
||
|
||
Inst.addOperand(MCOperand::CreateImm(Shift));
|
||
|
||
return S;
|
||
}
|
||
|
||
static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Val,
|
||
uint64_t Address, const void *Decoder) {
|
||
DecodeStatus S = MCDisassembler::Success;
|
||
|
||
bool writebackLoad = 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;
|
||
}
|
||
|
||
// Empty register lists are not allowed.
|
||
if (CountPopulation_32(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())
|
||
Check(S, MCDisassembler::SoftFail);
|
||
}
|
||
}
|
||
|
||
return S;
|
||
}
|
||
|
||
static DecodeStatus DecodeSPRRegListOperand(MCInst &Inst, unsigned Val,
|
||
uint64_t Address, const void *Decoder) {
|
||
DecodeStatus S = MCDisassembler::Success;
|
||
|
||
unsigned Vd = fieldFromInstruction32(Val, 8, 5);
|
||
unsigned regs = fieldFromInstruction32(Val, 0, 8);
|
||
|
||
if (!Check(S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
for (unsigned i = 0; i < (regs - 1); ++i) {
|
||
if (!Check(S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
}
|
||
|
||
return S;
|
||
}
|
||
|
||
static DecodeStatus DecodeDPRRegListOperand(MCInst &Inst, unsigned Val,
|
||
uint64_t Address, const void *Decoder) {
|
||
DecodeStatus S = MCDisassembler::Success;
|
||
|
||
unsigned Vd = fieldFromInstruction32(Val, 8, 5);
|
||
unsigned regs = fieldFromInstruction32(Val, 0, 8);
|
||
|
||
regs = regs >> 1;
|
||
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
for (unsigned i = 0; i < (regs - 1); ++i) {
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
}
|
||
|
||
return S;
|
||
}
|
||
|
||
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);
|
||
|
||
DecodeStatus S = MCDisassembler::Success;
|
||
if (lsb > msb) Check(S, MCDisassembler::SoftFail);
|
||
|
||
uint32_t msb_mask = 0xFFFFFFFF;
|
||
if (msb != 31) msb_mask = (1U << (msb+1)) - 1;
|
||
uint32_t lsb_mask = (1U << lsb) - 1;
|
||
|
||
Inst.addOperand(MCOperand::CreateImm(~(msb_mask ^ lsb_mask)));
|
||
return S;
|
||
}
|
||
|
||
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);
|
||
|
||
switch (Inst.getOpcode()) {
|
||
case ARM::LDC_OFFSET:
|
||
case ARM::LDC_PRE:
|
||
case ARM::LDC_POST:
|
||
case ARM::LDC_OPTION:
|
||
case ARM::LDCL_OFFSET:
|
||
case ARM::LDCL_PRE:
|
||
case ARM::LDCL_POST:
|
||
case ARM::LDCL_OPTION:
|
||
case ARM::STC_OFFSET:
|
||
case ARM::STC_PRE:
|
||
case ARM::STC_POST:
|
||
case ARM::STC_OPTION:
|
||
case ARM::STCL_OFFSET:
|
||
case ARM::STCL_PRE:
|
||
case ARM::STCL_POST:
|
||
case ARM::STCL_OPTION:
|
||
case ARM::t2LDC_OFFSET:
|
||
case ARM::t2LDC_PRE:
|
||
case ARM::t2LDC_POST:
|
||
case ARM::t2LDC_OPTION:
|
||
case ARM::t2LDCL_OFFSET:
|
||
case ARM::t2LDCL_PRE:
|
||
case ARM::t2LDCL_POST:
|
||
case ARM::t2LDCL_OPTION:
|
||
case ARM::t2STC_OFFSET:
|
||
case ARM::t2STC_PRE:
|
||
case ARM::t2STC_POST:
|
||
case ARM::t2STC_OPTION:
|
||
case ARM::t2STCL_OFFSET:
|
||
case ARM::t2STCL_PRE:
|
||
case ARM::t2STCL_POST:
|
||
case ARM::t2STCL_OPTION:
|
||
if (coproc == 0xA || coproc == 0xB)
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
Inst.addOperand(MCOperand::CreateImm(coproc));
|
||
Inst.addOperand(MCOperand::CreateImm(CRd));
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
switch (Inst.getOpcode()) {
|
||
case ARM::t2LDC2_OFFSET:
|
||
case ARM::t2LDC2L_OFFSET:
|
||
case ARM::t2LDC2_PRE:
|
||
case ARM::t2LDC2L_PRE:
|
||
case ARM::t2STC2_OFFSET:
|
||
case ARM::t2STC2L_OFFSET:
|
||
case ARM::t2STC2_PRE:
|
||
case ARM::t2STC2L_PRE:
|
||
case ARM::LDC2_OFFSET:
|
||
case ARM::LDC2L_OFFSET:
|
||
case ARM::LDC2_PRE:
|
||
case ARM::LDC2L_PRE:
|
||
case ARM::STC2_OFFSET:
|
||
case ARM::STC2L_OFFSET:
|
||
case ARM::STC2_PRE:
|
||
case ARM::STC2L_PRE:
|
||
case ARM::t2LDC_OFFSET:
|
||
case ARM::t2LDCL_OFFSET:
|
||
case ARM::t2LDC_PRE:
|
||
case ARM::t2LDCL_PRE:
|
||
case ARM::t2STC_OFFSET:
|
||
case ARM::t2STCL_OFFSET:
|
||
case ARM::t2STC_PRE:
|
||
case ARM::t2STCL_PRE:
|
||
case ARM::LDC_OFFSET:
|
||
case ARM::LDCL_OFFSET:
|
||
case ARM::LDC_PRE:
|
||
case ARM::LDCL_PRE:
|
||
case ARM::STC_OFFSET:
|
||
case ARM::STCL_OFFSET:
|
||
case ARM::STC_PRE:
|
||
case ARM::STCL_PRE:
|
||
imm = ARM_AM::getAM5Opc(U ? ARM_AM::add : ARM_AM::sub, imm);
|
||
Inst.addOperand(MCOperand::CreateImm(imm));
|
||
break;
|
||
case ARM::t2LDC2_POST:
|
||
case ARM::t2LDC2L_POST:
|
||
case ARM::t2STC2_POST:
|
||
case ARM::t2STC2L_POST:
|
||
case ARM::LDC2_POST:
|
||
case ARM::LDC2L_POST:
|
||
case ARM::STC2_POST:
|
||
case ARM::STC2L_POST:
|
||
case ARM::t2LDC_POST:
|
||
case ARM::t2LDCL_POST:
|
||
case ARM::t2STC_POST:
|
||
case ARM::t2STCL_POST:
|
||
case ARM::LDC_POST:
|
||
case ARM::LDCL_POST:
|
||
case ARM::STC_POST:
|
||
case ARM::STCL_POST:
|
||
imm |= U << 8;
|
||
// fall through.
|
||
default:
|
||
// The 'option' variant doesn't encode 'U' in the immediate since
|
||
// the immediate is unsigned [0,255].
|
||
Inst.addOperand(MCOperand::CreateImm(imm));
|
||
break;
|
||
}
|
||
|
||
switch (Inst.getOpcode()) {
|
||
case ARM::LDC_OFFSET:
|
||
case ARM::LDC_PRE:
|
||
case ARM::LDC_POST:
|
||
case ARM::LDC_OPTION:
|
||
case ARM::LDCL_OFFSET:
|
||
case ARM::LDCL_PRE:
|
||
case ARM::LDCL_POST:
|
||
case ARM::LDCL_OPTION:
|
||
case ARM::STC_OFFSET:
|
||
case ARM::STC_PRE:
|
||
case ARM::STC_POST:
|
||
case ARM::STC_OPTION:
|
||
case ARM::STCL_OFFSET:
|
||
case ARM::STCL_PRE:
|
||
case ARM::STCL_POST:
|
||
case ARM::STCL_OPTION:
|
||
if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
return S;
|
||
}
|
||
|
||
static DecodeStatus
|
||
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);
|
||
|
||
// On stores, the writeback operand precedes Rt.
|
||
switch (Inst.getOpcode()) {
|
||
case ARM::STR_POST_IMM:
|
||
case ARM::STR_POST_REG:
|
||
case ARM::STRB_POST_IMM:
|
||
case ARM::STRB_POST_REG:
|
||
case ARM::STRT_POST_REG:
|
||
case ARM::STRT_POST_IMM:
|
||
case ARM::STRBT_POST_REG:
|
||
case ARM::STRBT_POST_IMM:
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
// On loads, the writeback operand comes after Rt.
|
||
switch (Inst.getOpcode()) {
|
||
case ARM::LDR_POST_IMM:
|
||
case ARM::LDR_POST_REG:
|
||
case ARM::LDRB_POST_IMM:
|
||
case ARM::LDRB_POST_REG:
|
||
case ARM::LDRBT_POST_REG:
|
||
case ARM::LDRBT_POST_IMM:
|
||
case ARM::LDRT_POST_REG:
|
||
case ARM::LDRT_POST_IMM:
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
ARM_AM::AddrOpc Op = ARM_AM::add;
|
||
if (!fieldFromInstruction32(Insn, 23, 1))
|
||
Op = ARM_AM::sub;
|
||
|
||
bool writeback = (P == 0) || (W == 1);
|
||
unsigned idx_mode = 0;
|
||
if (P && writeback)
|
||
idx_mode = ARMII::IndexModePre;
|
||
else if (!P && writeback)
|
||
idx_mode = ARMII::IndexModePost;
|
||
|
||
if (writeback && (Rn == 15 || Rn == Rt))
|
||
S = MCDisassembler::SoftFail; // UNPREDICTABLE
|
||
|
||
if (reg) {
|
||
if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
ARM_AM::ShiftOpc Opc = ARM_AM::lsl;
|
||
switch( fieldFromInstruction32(Insn, 5, 2)) {
|
||
case 0:
|
||
Opc = ARM_AM::lsl;
|
||
break;
|
||
case 1:
|
||
Opc = ARM_AM::lsr;
|
||
break;
|
||
case 2:
|
||
Opc = ARM_AM::asr;
|
||
break;
|
||
case 3:
|
||
Opc = ARM_AM::ror;
|
||
break;
|
||
default:
|
||
return MCDisassembler::Fail;
|
||
}
|
||
unsigned amt = fieldFromInstruction32(Insn, 7, 5);
|
||
unsigned imm = ARM_AM::getAM2Opc(Op, amt, Opc, idx_mode);
|
||
|
||
Inst.addOperand(MCOperand::CreateImm(imm));
|
||
} else {
|
||
Inst.addOperand(MCOperand::CreateReg(0));
|
||
unsigned tmp = ARM_AM::getAM2Opc(Op, imm, ARM_AM::lsl, idx_mode);
|
||
Inst.addOperand(MCOperand::CreateImm(tmp));
|
||
}
|
||
|
||
if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
return S;
|
||
}
|
||
|
||
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);
|
||
|
||
ARM_AM::ShiftOpc ShOp = ARM_AM::lsl;
|
||
switch (type) {
|
||
case 0:
|
||
ShOp = ARM_AM::lsl;
|
||
break;
|
||
case 1:
|
||
ShOp = ARM_AM::lsr;
|
||
break;
|
||
case 2:
|
||
ShOp = ARM_AM::asr;
|
||
break;
|
||
case 3:
|
||
ShOp = ARM_AM::ror;
|
||
break;
|
||
}
|
||
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
unsigned shift;
|
||
if (U)
|
||
shift = ARM_AM::getAM2Opc(ARM_AM::add, imm, ShOp);
|
||
else
|
||
shift = ARM_AM::getAM2Opc(ARM_AM::sub, imm, ShOp);
|
||
Inst.addOperand(MCOperand::CreateImm(shift));
|
||
|
||
return S;
|
||
}
|
||
|
||
static DecodeStatus
|
||
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 Rt2 = Rt + 1;
|
||
|
||
bool writeback = (W == 1) | (P == 0);
|
||
|
||
// For {LD,ST}RD, Rt must be even, else undefined.
|
||
switch (Inst.getOpcode()) {
|
||
case ARM::STRD:
|
||
case ARM::STRD_PRE:
|
||
case ARM::STRD_POST:
|
||
case ARM::LDRD:
|
||
case ARM::LDRD_PRE:
|
||
case ARM::LDRD_POST:
|
||
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 && fieldFromInstruction32(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;
|
||
}
|
||
|
||
if (writeback) { // Writeback
|
||
if (P)
|
||
U |= ARMII::IndexModePre << 9;
|
||
else
|
||
U |= ARMII::IndexModePost << 9;
|
||
|
||
// On stores, the writeback operand precedes Rt.
|
||
switch (Inst.getOpcode()) {
|
||
case ARM::STRD:
|
||
case ARM::STRD_PRE:
|
||
case ARM::STRD_POST:
|
||
case ARM::STRH:
|
||
case ARM::STRH_PRE:
|
||
case ARM::STRH_POST:
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
switch (Inst.getOpcode()) {
|
||
case ARM::STRD:
|
||
case ARM::STRD_PRE:
|
||
case ARM::STRD_POST:
|
||
case ARM::LDRD:
|
||
case ARM::LDRD_PRE:
|
||
case ARM::LDRD_POST:
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
if (writeback) {
|
||
// On loads, the writeback operand comes after Rt.
|
||
switch (Inst.getOpcode()) {
|
||
case ARM::LDRD:
|
||
case ARM::LDRD_PRE:
|
||
case ARM::LDRD_POST:
|
||
case ARM::LDRH:
|
||
case ARM::LDRH_PRE:
|
||
case ARM::LDRH_POST:
|
||
case ARM::LDRSH:
|
||
case ARM::LDRSH_PRE:
|
||
case ARM::LDRSH_POST:
|
||
case ARM::LDRSB:
|
||
case ARM::LDRSB_PRE:
|
||
case ARM::LDRSB_POST:
|
||
case ARM::LDRHTr:
|
||
case ARM::LDRSBTr:
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
if (type) {
|
||
Inst.addOperand(MCOperand::CreateReg(0));
|
||
Inst.addOperand(MCOperand::CreateImm(U | (imm << 4) | Rm));
|
||
} else {
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(U));
|
||
}
|
||
|
||
if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
return S;
|
||
}
|
||
|
||
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);
|
||
|
||
switch (mode) {
|
||
case 0:
|
||
mode = ARM_AM::da;
|
||
break;
|
||
case 1:
|
||
mode = ARM_AM::ia;
|
||
break;
|
||
case 2:
|
||
mode = ARM_AM::db;
|
||
break;
|
||
case 3:
|
||
mode = ARM_AM::ib;
|
||
break;
|
||
}
|
||
|
||
Inst.addOperand(MCOperand::CreateImm(mode));
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, 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);
|
||
|
||
if (pred == 0xF) {
|
||
switch (Inst.getOpcode()) {
|
||
case ARM::LDMDA:
|
||
Inst.setOpcode(ARM::RFEDA);
|
||
break;
|
||
case ARM::LDMDA_UPD:
|
||
Inst.setOpcode(ARM::RFEDA_UPD);
|
||
break;
|
||
case ARM::LDMDB:
|
||
Inst.setOpcode(ARM::RFEDB);
|
||
break;
|
||
case ARM::LDMDB_UPD:
|
||
Inst.setOpcode(ARM::RFEDB_UPD);
|
||
break;
|
||
case ARM::LDMIA:
|
||
Inst.setOpcode(ARM::RFEIA);
|
||
break;
|
||
case ARM::LDMIA_UPD:
|
||
Inst.setOpcode(ARM::RFEIA_UPD);
|
||
break;
|
||
case ARM::LDMIB:
|
||
Inst.setOpcode(ARM::RFEIB);
|
||
break;
|
||
case ARM::LDMIB_UPD:
|
||
Inst.setOpcode(ARM::RFEIB_UPD);
|
||
break;
|
||
case ARM::STMDA:
|
||
Inst.setOpcode(ARM::SRSDA);
|
||
break;
|
||
case ARM::STMDA_UPD:
|
||
Inst.setOpcode(ARM::SRSDA_UPD);
|
||
break;
|
||
case ARM::STMDB:
|
||
Inst.setOpcode(ARM::SRSDB);
|
||
break;
|
||
case ARM::STMDB_UPD:
|
||
Inst.setOpcode(ARM::SRSDB_UPD);
|
||
break;
|
||
case ARM::STMIA:
|
||
Inst.setOpcode(ARM::SRSIA);
|
||
break;
|
||
case ARM::STMIA_UPD:
|
||
Inst.setOpcode(ARM::SRSIA_UPD);
|
||
break;
|
||
case ARM::STMIB:
|
||
Inst.setOpcode(ARM::SRSIB);
|
||
break;
|
||
case ARM::STMIB_UPD:
|
||
Inst.setOpcode(ARM::SRSIB_UPD);
|
||
break;
|
||
default:
|
||
if (!Check(S, MCDisassembler::Fail)) return MCDisassembler::Fail;
|
||
}
|
||
|
||
// For stores (which become SRS's, the only operand is the mode.
|
||
if (fieldFromInstruction32(Insn, 20, 1) == 0) {
|
||
Inst.addOperand(
|
||
MCOperand::CreateImm(fieldFromInstruction32(Insn, 0, 4)));
|
||
return S;
|
||
}
|
||
|
||
return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
|
||
}
|
||
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail; // Tied
|
||
if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
return S;
|
||
}
|
||
|
||
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);
|
||
|
||
DecodeStatus S = MCDisassembler::Success;
|
||
|
||
// 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
|
||
// nothing useful we could do even if we returned UNPREDICTABLE.
|
||
|
||
if (imod == 1) return MCDisassembler::Fail;
|
||
|
||
if (imod && M) {
|
||
Inst.setOpcode(ARM::CPS3p);
|
||
Inst.addOperand(MCOperand::CreateImm(imod));
|
||
Inst.addOperand(MCOperand::CreateImm(iflags));
|
||
Inst.addOperand(MCOperand::CreateImm(mode));
|
||
} else if (imod && !M) {
|
||
Inst.setOpcode(ARM::CPS2p);
|
||
Inst.addOperand(MCOperand::CreateImm(imod));
|
||
Inst.addOperand(MCOperand::CreateImm(iflags));
|
||
if (mode) S = MCDisassembler::SoftFail;
|
||
} else if (!imod && M) {
|
||
Inst.setOpcode(ARM::CPS1p);
|
||
Inst.addOperand(MCOperand::CreateImm(mode));
|
||
if (iflags) S = MCDisassembler::SoftFail;
|
||
} else {
|
||
// imod == '00' && M == '0' --> UNPREDICTABLE
|
||
Inst.setOpcode(ARM::CPS1p);
|
||
Inst.addOperand(MCOperand::CreateImm(mode));
|
||
S = MCDisassembler::SoftFail;
|
||
}
|
||
|
||
return S;
|
||
}
|
||
|
||
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);
|
||
|
||
DecodeStatus S = MCDisassembler::Success;
|
||
|
||
// 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
|
||
// nothing useful we could do even if we returned UNPREDICTABLE.
|
||
|
||
if (imod == 1) return MCDisassembler::Fail;
|
||
|
||
if (imod && M) {
|
||
Inst.setOpcode(ARM::t2CPS3p);
|
||
Inst.addOperand(MCOperand::CreateImm(imod));
|
||
Inst.addOperand(MCOperand::CreateImm(iflags));
|
||
Inst.addOperand(MCOperand::CreateImm(mode));
|
||
} else if (imod && !M) {
|
||
Inst.setOpcode(ARM::t2CPS2p);
|
||
Inst.addOperand(MCOperand::CreateImm(imod));
|
||
Inst.addOperand(MCOperand::CreateImm(iflags));
|
||
if (mode) S = MCDisassembler::SoftFail;
|
||
} else if (!imod && M) {
|
||
Inst.setOpcode(ARM::t2CPS1p);
|
||
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;
|
||
}
|
||
|
||
return S;
|
||
}
|
||
|
||
static DecodeStatus DecodeT2MOVTWInstruction(MCInst &Inst, unsigned Insn,
|
||
uint64_t Address, const void *Decoder) {
|
||
DecodeStatus S = MCDisassembler::Success;
|
||
|
||
unsigned Rd = fieldFromInstruction32(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);
|
||
|
||
if (Inst.getOpcode() == ARM::t2MOVTi16)
|
||
if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
|
||
Inst.addOperand(MCOperand::CreateImm(imm));
|
||
|
||
return S;
|
||
}
|
||
|
||
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 imm = 0;
|
||
|
||
imm |= (fieldFromInstruction32(Insn, 0, 12) << 0);
|
||
imm |= (fieldFromInstruction32(Insn, 16, 4) << 12);
|
||
|
||
if (Inst.getOpcode() == ARM::MOVTi16)
|
||
if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
if (!tryAddingSymbolicOperand(Address, imm, false, 4, Inst, Decoder))
|
||
Inst.addOperand(MCOperand::CreateImm(imm));
|
||
|
||
if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
return S;
|
||
}
|
||
|
||
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);
|
||
|
||
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, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
return S;
|
||
}
|
||
|
||
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);
|
||
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
if (!add) imm *= -1;
|
||
if (imm == 0 && !add) imm = INT32_MIN;
|
||
Inst.addOperand(MCOperand::CreateImm(imm));
|
||
if (Rn == 15)
|
||
tryAddingPcLoadReferenceComment(Address, Address + imm + 8, Decoder);
|
||
|
||
return S;
|
||
}
|
||
|
||
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);
|
||
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
if (U)
|
||
Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add, imm)));
|
||
else
|
||
Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub, imm)));
|
||
|
||
return S;
|
||
}
|
||
|
||
static DecodeStatus DecodeAddrMode7Operand(MCInst &Inst, unsigned Val,
|
||
uint64_t Address, const void *Decoder) {
|
||
return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
|
||
}
|
||
|
||
static DecodeStatus
|
||
DecodeT2BInstruction(MCInst &Inst, unsigned Insn,
|
||
uint64_t Address, const void *Decoder) {
|
||
DecodeStatus S = MCDisassembler::Success;
|
||
unsigned imm = (fieldFromInstruction32(Insn, 0, 11) << 0) |
|
||
(fieldFromInstruction32(Insn, 11, 1) << 18) |
|
||
(fieldFromInstruction32(Insn, 13, 1) << 17) |
|
||
(fieldFromInstruction32(Insn, 16, 6) << 11) |
|
||
(fieldFromInstruction32(Insn, 26, 1) << 19);
|
||
if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<20>(imm<<1) + 4,
|
||
true, 4, Inst, Decoder))
|
||
Inst.addOperand(MCOperand::CreateImm(SignExtend32<20>(imm << 1)));
|
||
return S;
|
||
}
|
||
|
||
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;
|
||
|
||
if (pred == 0xF) {
|
||
Inst.setOpcode(ARM::BLXi);
|
||
imm |= fieldFromInstruction32(Insn, 24, 1) << 1;
|
||
if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
|
||
true, 4, Inst, Decoder))
|
||
Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
|
||
return S;
|
||
}
|
||
|
||
if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<26>(imm) + 8,
|
||
true, 4, Inst, Decoder))
|
||
Inst.addOperand(MCOperand::CreateImm(SignExtend32<26>(imm)));
|
||
if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
return S;
|
||
}
|
||
|
||
|
||
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);
|
||
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!align)
|
||
Inst.addOperand(MCOperand::CreateImm(0));
|
||
else
|
||
Inst.addOperand(MCOperand::CreateImm(4 << align));
|
||
|
||
return S;
|
||
}
|
||
|
||
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);
|
||
|
||
// First output register
|
||
switch (Inst.getOpcode()) {
|
||
case ARM::VLD1q16: case ARM::VLD1q32: case ARM::VLD1q64: case ARM::VLD1q8:
|
||
case ARM::VLD1q16wb_fixed: case ARM::VLD1q16wb_register:
|
||
case ARM::VLD1q32wb_fixed: case ARM::VLD1q32wb_register:
|
||
case ARM::VLD1q64wb_fixed: case ARM::VLD1q64wb_register:
|
||
case ARM::VLD1q8wb_fixed: case ARM::VLD1q8wb_register:
|
||
case ARM::VLD2d16: case ARM::VLD2d32: case ARM::VLD2d8:
|
||
case ARM::VLD2d16wb_fixed: case ARM::VLD2d16wb_register:
|
||
case ARM::VLD2d32wb_fixed: case ARM::VLD2d32wb_register:
|
||
case ARM::VLD2d8wb_fixed: case ARM::VLD2d8wb_register:
|
||
if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
case ARM::VLD2b16:
|
||
case ARM::VLD2b32:
|
||
case ARM::VLD2b8:
|
||
case ARM::VLD2b16wb_fixed:
|
||
case ARM::VLD2b16wb_register:
|
||
case ARM::VLD2b32wb_fixed:
|
||
case ARM::VLD2b32wb_register:
|
||
case ARM::VLD2b8wb_fixed:
|
||
case ARM::VLD2b8wb_register:
|
||
if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
default:
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
}
|
||
|
||
// Second output register
|
||
switch (Inst.getOpcode()) {
|
||
case ARM::VLD3d8:
|
||
case ARM::VLD3d16:
|
||
case ARM::VLD3d32:
|
||
case ARM::VLD3d8_UPD:
|
||
case ARM::VLD3d16_UPD:
|
||
case ARM::VLD3d32_UPD:
|
||
case ARM::VLD4d8:
|
||
case ARM::VLD4d16:
|
||
case ARM::VLD4d32:
|
||
case ARM::VLD4d8_UPD:
|
||
case ARM::VLD4d16_UPD:
|
||
case ARM::VLD4d32_UPD:
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
case ARM::VLD3q8:
|
||
case ARM::VLD3q16:
|
||
case ARM::VLD3q32:
|
||
case ARM::VLD3q8_UPD:
|
||
case ARM::VLD3q16_UPD:
|
||
case ARM::VLD3q32_UPD:
|
||
case ARM::VLD4q8:
|
||
case ARM::VLD4q16:
|
||
case ARM::VLD4q32:
|
||
case ARM::VLD4q8_UPD:
|
||
case ARM::VLD4q16_UPD:
|
||
case ARM::VLD4q32_UPD:
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
// Third output register
|
||
switch(Inst.getOpcode()) {
|
||
case ARM::VLD3d8:
|
||
case ARM::VLD3d16:
|
||
case ARM::VLD3d32:
|
||
case ARM::VLD3d8_UPD:
|
||
case ARM::VLD3d16_UPD:
|
||
case ARM::VLD3d32_UPD:
|
||
case ARM::VLD4d8:
|
||
case ARM::VLD4d16:
|
||
case ARM::VLD4d32:
|
||
case ARM::VLD4d8_UPD:
|
||
case ARM::VLD4d16_UPD:
|
||
case ARM::VLD4d32_UPD:
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
case ARM::VLD3q8:
|
||
case ARM::VLD3q16:
|
||
case ARM::VLD3q32:
|
||
case ARM::VLD3q8_UPD:
|
||
case ARM::VLD3q16_UPD:
|
||
case ARM::VLD3q32_UPD:
|
||
case ARM::VLD4q8:
|
||
case ARM::VLD4q16:
|
||
case ARM::VLD4q32:
|
||
case ARM::VLD4q8_UPD:
|
||
case ARM::VLD4q16_UPD:
|
||
case ARM::VLD4q32_UPD:
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
// Fourth output register
|
||
switch (Inst.getOpcode()) {
|
||
case ARM::VLD4d8:
|
||
case ARM::VLD4d16:
|
||
case ARM::VLD4d32:
|
||
case ARM::VLD4d8_UPD:
|
||
case ARM::VLD4d16_UPD:
|
||
case ARM::VLD4d32_UPD:
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
case ARM::VLD4q8:
|
||
case ARM::VLD4q16:
|
||
case ARM::VLD4q32:
|
||
case ARM::VLD4q8_UPD:
|
||
case ARM::VLD4q16_UPD:
|
||
case ARM::VLD4q32_UPD:
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
// Writeback operand
|
||
switch (Inst.getOpcode()) {
|
||
case ARM::VLD1d8wb_fixed:
|
||
case ARM::VLD1d16wb_fixed:
|
||
case ARM::VLD1d32wb_fixed:
|
||
case ARM::VLD1d64wb_fixed:
|
||
case ARM::VLD1d8wb_register:
|
||
case ARM::VLD1d16wb_register:
|
||
case ARM::VLD1d32wb_register:
|
||
case ARM::VLD1d64wb_register:
|
||
case ARM::VLD1q8wb_fixed:
|
||
case ARM::VLD1q16wb_fixed:
|
||
case ARM::VLD1q32wb_fixed:
|
||
case ARM::VLD1q64wb_fixed:
|
||
case ARM::VLD1q8wb_register:
|
||
case ARM::VLD1q16wb_register:
|
||
case ARM::VLD1q32wb_register:
|
||
case ARM::VLD1q64wb_register:
|
||
case ARM::VLD1d8Twb_fixed:
|
||
case ARM::VLD1d8Twb_register:
|
||
case ARM::VLD1d16Twb_fixed:
|
||
case ARM::VLD1d16Twb_register:
|
||
case ARM::VLD1d32Twb_fixed:
|
||
case ARM::VLD1d32Twb_register:
|
||
case ARM::VLD1d64Twb_fixed:
|
||
case ARM::VLD1d64Twb_register:
|
||
case ARM::VLD1d8Qwb_fixed:
|
||
case ARM::VLD1d8Qwb_register:
|
||
case ARM::VLD1d16Qwb_fixed:
|
||
case ARM::VLD1d16Qwb_register:
|
||
case ARM::VLD1d32Qwb_fixed:
|
||
case ARM::VLD1d32Qwb_register:
|
||
case ARM::VLD1d64Qwb_fixed:
|
||
case ARM::VLD1d64Qwb_register:
|
||
case ARM::VLD2d8wb_fixed:
|
||
case ARM::VLD2d16wb_fixed:
|
||
case ARM::VLD2d32wb_fixed:
|
||
case ARM::VLD2q8wb_fixed:
|
||
case ARM::VLD2q16wb_fixed:
|
||
case ARM::VLD2q32wb_fixed:
|
||
case ARM::VLD2d8wb_register:
|
||
case ARM::VLD2d16wb_register:
|
||
case ARM::VLD2d32wb_register:
|
||
case ARM::VLD2q8wb_register:
|
||
case ARM::VLD2q16wb_register:
|
||
case ARM::VLD2q32wb_register:
|
||
case ARM::VLD2b8wb_fixed:
|
||
case ARM::VLD2b16wb_fixed:
|
||
case ARM::VLD2b32wb_fixed:
|
||
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:
|
||
case ARM::VLD3q8_UPD:
|
||
case ARM::VLD3q16_UPD:
|
||
case ARM::VLD3q32_UPD:
|
||
case ARM::VLD4d8_UPD:
|
||
case ARM::VLD4d16_UPD:
|
||
case ARM::VLD4d32_UPD:
|
||
case ARM::VLD4q8_UPD:
|
||
case ARM::VLD4q16_UPD:
|
||
case ARM::VLD4q32_UPD:
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
// AddrMode6 Base (register+alignment)
|
||
if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
// AddrMode6 Offset (register)
|
||
switch (Inst.getOpcode()) {
|
||
default:
|
||
// The below have been updated to have explicit am6offset split
|
||
// between fixed and register offset. For those instructions not
|
||
// yet updated, we need to add an additional reg0 operand for the
|
||
// fixed variant.
|
||
//
|
||
// The fixed offset encodes as Rm == 0xd, so we check for that.
|
||
if (Rm == 0xd) {
|
||
Inst.addOperand(MCOperand::CreateReg(0));
|
||
break;
|
||
}
|
||
// Fall through to handle the register offset variant.
|
||
case ARM::VLD1d8wb_fixed:
|
||
case ARM::VLD1d16wb_fixed:
|
||
case ARM::VLD1d32wb_fixed:
|
||
case ARM::VLD1d64wb_fixed:
|
||
case ARM::VLD1d8Twb_fixed:
|
||
case ARM::VLD1d16Twb_fixed:
|
||
case ARM::VLD1d32Twb_fixed:
|
||
case ARM::VLD1d64Twb_fixed:
|
||
case ARM::VLD1d8Qwb_fixed:
|
||
case ARM::VLD1d16Qwb_fixed:
|
||
case ARM::VLD1d32Qwb_fixed:
|
||
case ARM::VLD1d64Qwb_fixed:
|
||
case ARM::VLD1d8wb_register:
|
||
case ARM::VLD1d16wb_register:
|
||
case ARM::VLD1d32wb_register:
|
||
case ARM::VLD1d64wb_register:
|
||
case ARM::VLD1q8wb_fixed:
|
||
case ARM::VLD1q16wb_fixed:
|
||
case ARM::VLD1q32wb_fixed:
|
||
case ARM::VLD1q64wb_fixed:
|
||
case ARM::VLD1q8wb_register:
|
||
case ARM::VLD1q16wb_register:
|
||
case ARM::VLD1q32wb_register:
|
||
case ARM::VLD1q64wb_register:
|
||
// The fixed offset post-increment encodes Rm == 0xd. The no-writeback
|
||
// variant encodes Rm == 0xf. Anything else is a register offset post-
|
||
// increment and we need to add the register operand to the instruction.
|
||
if (Rm != 0xD && Rm != 0xF &&
|
||
!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(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);
|
||
|
||
// 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::VST1d64wb_register:
|
||
case ARM::VST1q8wb_fixed:
|
||
case ARM::VST1q16wb_fixed:
|
||
case ARM::VST1q32wb_fixed:
|
||
case ARM::VST1q64wb_fixed:
|
||
case ARM::VST1q8wb_register:
|
||
case ARM::VST1q16wb_register:
|
||
case ARM::VST1q32wb_register:
|
||
case ARM::VST1q64wb_register:
|
||
case ARM::VST1d8Twb_fixed:
|
||
case ARM::VST1d16Twb_fixed:
|
||
case ARM::VST1d32Twb_fixed:
|
||
case ARM::VST1d64Twb_fixed:
|
||
case ARM::VST1d8Twb_register:
|
||
case ARM::VST1d16Twb_register:
|
||
case ARM::VST1d32Twb_register:
|
||
case ARM::VST1d64Twb_register:
|
||
case ARM::VST1d8Qwb_fixed:
|
||
case ARM::VST1d16Qwb_fixed:
|
||
case ARM::VST1d32Qwb_fixed:
|
||
case ARM::VST1d64Qwb_fixed:
|
||
case ARM::VST1d8Qwb_register:
|
||
case ARM::VST1d16Qwb_register:
|
||
case ARM::VST1d32Qwb_register:
|
||
case ARM::VST1d64Qwb_register:
|
||
case ARM::VST2d8wb_fixed:
|
||
case ARM::VST2d16wb_fixed:
|
||
case ARM::VST2d32wb_fixed:
|
||
case ARM::VST2d8wb_register:
|
||
case ARM::VST2d16wb_register:
|
||
case ARM::VST2d32wb_register:
|
||
case ARM::VST2q8wb_fixed:
|
||
case ARM::VST2q16wb_fixed:
|
||
case ARM::VST2q32wb_fixed:
|
||
case ARM::VST2q8wb_register:
|
||
case ARM::VST2q16wb_register:
|
||
case ARM::VST2q32wb_register:
|
||
case ARM::VST2b8wb_fixed:
|
||
case ARM::VST2b16wb_fixed:
|
||
case ARM::VST2b32wb_fixed:
|
||
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::VST3q8_UPD:
|
||
case ARM::VST3q16_UPD:
|
||
case ARM::VST3q32_UPD:
|
||
case ARM::VST4d8_UPD:
|
||
case ARM::VST4d16_UPD:
|
||
case ARM::VST4d32_UPD:
|
||
case ARM::VST4q8_UPD:
|
||
case ARM::VST4q16_UPD:
|
||
case ARM::VST4q32_UPD:
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
// AddrMode6 Base (register+alignment)
|
||
if (!Check(S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
// AddrMode6 Offset (register)
|
||
switch (Inst.getOpcode()) {
|
||
default:
|
||
if (Rm == 0xD)
|
||
Inst.addOperand(MCOperand::CreateReg(0));
|
||
else if (Rm != 0xF) {
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
}
|
||
break;
|
||
case ARM::VST1d8wb_fixed:
|
||
case ARM::VST1d16wb_fixed:
|
||
case ARM::VST1d32wb_fixed:
|
||
case ARM::VST1d64wb_fixed:
|
||
case ARM::VST1q8wb_fixed:
|
||
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;
|
||
}
|
||
|
||
|
||
// First input register
|
||
switch (Inst.getOpcode()) {
|
||
case ARM::VST1q16:
|
||
case ARM::VST1q32:
|
||
case ARM::VST1q64:
|
||
case ARM::VST1q8:
|
||
case ARM::VST1q16wb_fixed:
|
||
case ARM::VST1q16wb_register:
|
||
case ARM::VST1q32wb_fixed:
|
||
case ARM::VST1q32wb_register:
|
||
case ARM::VST1q64wb_fixed:
|
||
case ARM::VST1q64wb_register:
|
||
case ARM::VST1q8wb_fixed:
|
||
case ARM::VST1q8wb_register:
|
||
case ARM::VST2d16:
|
||
case ARM::VST2d32:
|
||
case ARM::VST2d8:
|
||
case ARM::VST2d16wb_fixed:
|
||
case ARM::VST2d16wb_register:
|
||
case ARM::VST2d32wb_fixed:
|
||
case ARM::VST2d32wb_register:
|
||
case ARM::VST2d8wb_fixed:
|
||
case ARM::VST2d8wb_register:
|
||
if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
case ARM::VST2b16:
|
||
case ARM::VST2b32:
|
||
case ARM::VST2b8:
|
||
case ARM::VST2b16wb_fixed:
|
||
case ARM::VST2b16wb_register:
|
||
case ARM::VST2b32wb_fixed:
|
||
case ARM::VST2b32wb_register:
|
||
case ARM::VST2b8wb_fixed:
|
||
case ARM::VST2b8wb_register:
|
||
if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
default:
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
}
|
||
|
||
// Second input register
|
||
switch (Inst.getOpcode()) {
|
||
case ARM::VST3d8:
|
||
case ARM::VST3d16:
|
||
case ARM::VST3d32:
|
||
case ARM::VST3d8_UPD:
|
||
case ARM::VST3d16_UPD:
|
||
case ARM::VST3d32_UPD:
|
||
case ARM::VST4d8:
|
||
case ARM::VST4d16:
|
||
case ARM::VST4d32:
|
||
case ARM::VST4d8_UPD:
|
||
case ARM::VST4d16_UPD:
|
||
case ARM::VST4d32_UPD:
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
case ARM::VST3q8:
|
||
case ARM::VST3q16:
|
||
case ARM::VST3q32:
|
||
case ARM::VST3q8_UPD:
|
||
case ARM::VST3q16_UPD:
|
||
case ARM::VST3q32_UPD:
|
||
case ARM::VST4q8:
|
||
case ARM::VST4q16:
|
||
case ARM::VST4q32:
|
||
case ARM::VST4q8_UPD:
|
||
case ARM::VST4q16_UPD:
|
||
case ARM::VST4q32_UPD:
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
// Third input register
|
||
switch (Inst.getOpcode()) {
|
||
case ARM::VST3d8:
|
||
case ARM::VST3d16:
|
||
case ARM::VST3d32:
|
||
case ARM::VST3d8_UPD:
|
||
case ARM::VST3d16_UPD:
|
||
case ARM::VST3d32_UPD:
|
||
case ARM::VST4d8:
|
||
case ARM::VST4d16:
|
||
case ARM::VST4d32:
|
||
case ARM::VST4d8_UPD:
|
||
case ARM::VST4d16_UPD:
|
||
case ARM::VST4d32_UPD:
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
case ARM::VST3q8:
|
||
case ARM::VST3q16:
|
||
case ARM::VST3q32:
|
||
case ARM::VST3q8_UPD:
|
||
case ARM::VST3q16_UPD:
|
||
case ARM::VST3q32_UPD:
|
||
case ARM::VST4q8:
|
||
case ARM::VST4q16:
|
||
case ARM::VST4q32:
|
||
case ARM::VST4q8_UPD:
|
||
case ARM::VST4q16_UPD:
|
||
case ARM::VST4q32_UPD:
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
// Fourth input register
|
||
switch (Inst.getOpcode()) {
|
||
case ARM::VST4d8:
|
||
case ARM::VST4d16:
|
||
case ARM::VST4d32:
|
||
case ARM::VST4d8_UPD:
|
||
case ARM::VST4d16_UPD:
|
||
case ARM::VST4d32_UPD:
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
case ARM::VST4q8:
|
||
case ARM::VST4q16:
|
||
case ARM::VST4q32:
|
||
case ARM::VST4q8_UPD:
|
||
case ARM::VST4q16_UPD:
|
||
case ARM::VST4q32_UPD:
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
return S;
|
||
}
|
||
|
||
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);
|
||
|
||
align *= (1 << size);
|
||
|
||
switch (Inst.getOpcode()) {
|
||
case ARM::VLD1DUPq16: case ARM::VLD1DUPq32: case ARM::VLD1DUPq8:
|
||
case ARM::VLD1DUPq16wb_fixed: case ARM::VLD1DUPq16wb_register:
|
||
case ARM::VLD1DUPq32wb_fixed: case ARM::VLD1DUPq32wb_register:
|
||
case ARM::VLD1DUPq8wb_fixed: case ARM::VLD1DUPq8wb_register:
|
||
if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
default:
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
}
|
||
if (Rm != 0xF) {
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
}
|
||
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(align));
|
||
|
||
// The fixed offset post-increment encodes Rm == 0xd. The no-writeback
|
||
// variant encodes Rm == 0xf. Anything else is a register offset post-
|
||
// increment and we need to add the register operand to the instruction.
|
||
if (Rm != 0xD && Rm != 0xF &&
|
||
!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
return S;
|
||
}
|
||
|
||
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);
|
||
align *= 2*size;
|
||
|
||
switch (Inst.getOpcode()) {
|
||
case ARM::VLD2DUPd16: case ARM::VLD2DUPd32: case ARM::VLD2DUPd8:
|
||
case ARM::VLD2DUPd16wb_fixed: case ARM::VLD2DUPd16wb_register:
|
||
case ARM::VLD2DUPd32wb_fixed: case ARM::VLD2DUPd32wb_register:
|
||
case ARM::VLD2DUPd8wb_fixed: case ARM::VLD2DUPd8wb_register:
|
||
if (!Check(S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
case ARM::VLD2DUPd16x2: case ARM::VLD2DUPd32x2: case ARM::VLD2DUPd8x2:
|
||
case ARM::VLD2DUPd16x2wb_fixed: case ARM::VLD2DUPd16x2wb_register:
|
||
case ARM::VLD2DUPd32x2wb_fixed: case ARM::VLD2DUPd32x2wb_register:
|
||
case ARM::VLD2DUPd8x2wb_fixed: case ARM::VLD2DUPd8x2wb_register:
|
||
if (!Check(S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
default:
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
}
|
||
|
||
if (Rm != 0xF)
|
||
Inst.addOperand(MCOperand::CreateImm(0));
|
||
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(align));
|
||
|
||
if (Rm != 0xD && Rm != 0xF) {
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
}
|
||
|
||
return S;
|
||
}
|
||
|
||
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;
|
||
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (Rm != 0xF) {
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
}
|
||
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(0));
|
||
|
||
if (Rm == 0xD)
|
||
Inst.addOperand(MCOperand::CreateReg(0));
|
||
else if (Rm != 0xF) {
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
}
|
||
|
||
return S;
|
||
}
|
||
|
||
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);
|
||
|
||
if (size == 0x3) {
|
||
size = 4;
|
||
align = 16;
|
||
} else {
|
||
if (size == 2) {
|
||
size = 1 << size;
|
||
align *= 8;
|
||
} else {
|
||
size = 1 << size;
|
||
align *= 4*size;
|
||
}
|
||
}
|
||
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (Rm != 0xF) {
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
}
|
||
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(align));
|
||
|
||
if (Rm == 0xD)
|
||
Inst.addOperand(MCOperand::CreateReg(0));
|
||
else if (Rm != 0xF) {
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
}
|
||
|
||
return S;
|
||
}
|
||
|
||
static DecodeStatus
|
||
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);
|
||
|
||
if (Q) {
|
||
if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
} else {
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
}
|
||
|
||
Inst.addOperand(MCOperand::CreateImm(imm));
|
||
|
||
switch (Inst.getOpcode()) {
|
||
case ARM::VORRiv4i16:
|
||
case ARM::VORRiv2i32:
|
||
case ARM::VBICiv4i16:
|
||
case ARM::VBICiv2i32:
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
case ARM::VORRiv8i16:
|
||
case ARM::VORRiv4i32:
|
||
case ARM::VBICiv8i16:
|
||
case ARM::VBICiv4i32:
|
||
if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
return S;
|
||
}
|
||
|
||
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);
|
||
|
||
if (!Check(S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(8 << size));
|
||
|
||
return S;
|
||
}
|
||
|
||
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(MCInst &Inst, unsigned Val,
|
||
uint64_t Address, const void *Decoder) {
|
||
Inst.addOperand(MCOperand::CreateImm(16 - Val));
|
||
return MCDisassembler::Success;
|
||
}
|
||
|
||
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(MCInst &Inst, unsigned Val,
|
||
uint64_t Address, const void *Decoder) {
|
||
Inst.addOperand(MCOperand::CreateImm(64 - Val));
|
||
return MCDisassembler::Success;
|
||
}
|
||
|
||
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);
|
||
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (op) {
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail; // Writeback
|
||
}
|
||
|
||
switch (Inst.getOpcode()) {
|
||
case ARM::VTBL2:
|
||
case ARM::VTBX2:
|
||
if (!Check(S, DecodeDPairRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
break;
|
||
default:
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
}
|
||
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
return S;
|
||
}
|
||
|
||
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);
|
||
|
||
if (!Check(S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
switch(Inst.getOpcode()) {
|
||
default:
|
||
return MCDisassembler::Fail;
|
||
case ARM::tADR:
|
||
break; // tADR does not explicitly represent the PC as an operand.
|
||
case ARM::tADDrSPi:
|
||
Inst.addOperand(MCOperand::CreateReg(ARM::SP));
|
||
break;
|
||
}
|
||
|
||
Inst.addOperand(MCOperand::CreateImm(imm));
|
||
return S;
|
||
}
|
||
|
||
static DecodeStatus DecodeThumbBROperand(MCInst &Inst, unsigned Val,
|
||
uint64_t Address, const void *Decoder) {
|
||
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(MCInst &Inst, unsigned Val,
|
||
uint64_t Address, const void *Decoder) {
|
||
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(MCInst &Inst, unsigned Val,
|
||
uint64_t Address, const void *Decoder) {
|
||
if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<7>(Val<<1) + 4,
|
||
true, 2, Inst, Decoder))
|
||
Inst.addOperand(MCOperand::CreateImm(SignExtend32<7>(Val << 1)));
|
||
return MCDisassembler::Success;
|
||
}
|
||
|
||
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);
|
||
|
||
if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
return S;
|
||
}
|
||
|
||
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);
|
||
|
||
if (!Check(S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(imm));
|
||
|
||
return S;
|
||
}
|
||
|
||
static DecodeStatus DecodeThumbAddrModePC(MCInst &Inst, unsigned Val,
|
||
uint64_t Address, const void *Decoder) {
|
||
unsigned imm = Val << 2;
|
||
|
||
Inst.addOperand(MCOperand::CreateImm(imm));
|
||
tryAddingPcLoadReferenceComment(Address, (Address & ~2u) + imm + 4, Decoder);
|
||
|
||
return MCDisassembler::Success;
|
||
}
|
||
|
||
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(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);
|
||
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(imm));
|
||
|
||
return S;
|
||
}
|
||
|
||
static DecodeStatus DecodeT2LoadShift(MCInst &Inst, unsigned Insn,
|
||
uint64_t Address, const void *Decoder) {
|
||
DecodeStatus S = MCDisassembler::Success;
|
||
|
||
switch (Inst.getOpcode()) {
|
||
case ARM::t2PLDs:
|
||
case ARM::t2PLDWs:
|
||
case ARM::t2PLIs:
|
||
break;
|
||
default: {
|
||
unsigned Rt = fieldFromInstruction32(Insn, 12, 4);
|
||
if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
}
|
||
}
|
||
|
||
unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
|
||
if (Rn == 0xF) {
|
||
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:
|
||
return MCDisassembler::Fail;
|
||
}
|
||
|
||
int imm = fieldFromInstruction32(Insn, 0, 12);
|
||
if (!fieldFromInstruction32(Insn, 23, 1)) imm *= -1;
|
||
Inst.addOperand(MCOperand::CreateImm(imm));
|
||
|
||
return S;
|
||
}
|
||
|
||
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)))
|
||
return MCDisassembler::Fail;
|
||
|
||
return S;
|
||
}
|
||
|
||
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));
|
||
|
||
return MCDisassembler::Success;
|
||
}
|
||
|
||
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);
|
||
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
return S;
|
||
}
|
||
|
||
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);
|
||
|
||
if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
Inst.addOperand(MCOperand::CreateImm(imm));
|
||
|
||
return S;
|
||
}
|
||
|
||
static DecodeStatus DecodeT2Imm8(MCInst &Inst, unsigned Val,
|
||
uint64_t Address, const void *Decoder) {
|
||
int imm = Val & 0xFF;
|
||
if (Val == 0)
|
||
imm = INT32_MIN;
|
||
else if (!(Val & 0x100))
|
||
imm *= -1;
|
||
Inst.addOperand(MCOperand::CreateImm(imm));
|
||
|
||
return MCDisassembler::Success;
|
||
}
|
||
|
||
|
||
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);
|
||
|
||
// Some instructions always use an additive offset.
|
||
switch (Inst.getOpcode()) {
|
||
case ARM::t2LDRT:
|
||
case ARM::t2LDRBT:
|
||
case ARM::t2LDRHT:
|
||
case ARM::t2LDRSBT:
|
||
case ARM::t2LDRSHT:
|
||
case ARM::t2STRT:
|
||
case ARM::t2STRBT:
|
||
case ARM::t2STRHT:
|
||
imm |= 0x100;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
return S;
|
||
}
|
||
|
||
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;
|
||
addr |= Rn << 9;
|
||
unsigned load = fieldFromInstruction32(Insn, 20, 1);
|
||
|
||
if (!load) {
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
}
|
||
|
||
if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
if (load) {
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
}
|
||
|
||
if (!Check(S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
return S;
|
||
}
|
||
|
||
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);
|
||
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(imm));
|
||
|
||
return S;
|
||
}
|
||
|
||
|
||
static DecodeStatus DecodeThumbAddSPImm(MCInst &Inst, uint16_t Insn,
|
||
uint64_t Address, const void *Decoder) {
|
||
unsigned imm = fieldFromInstruction16(Insn, 0, 7);
|
||
|
||
Inst.addOperand(MCOperand::CreateReg(ARM::SP));
|
||
Inst.addOperand(MCOperand::CreateReg(ARM::SP));
|
||
Inst.addOperand(MCOperand::CreateImm(imm));
|
||
|
||
return MCDisassembler::Success;
|
||
}
|
||
|
||
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;
|
||
|
||
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;
|
||
} else if (Inst.getOpcode() == ARM::tADDspr) {
|
||
unsigned Rm = fieldFromInstruction16(Insn, 3, 4);
|
||
|
||
Inst.addOperand(MCOperand::CreateReg(ARM::SP));
|
||
Inst.addOperand(MCOperand::CreateReg(ARM::SP));
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
}
|
||
|
||
return S;
|
||
}
|
||
|
||
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);
|
||
|
||
Inst.addOperand(MCOperand::CreateImm(imod));
|
||
Inst.addOperand(MCOperand::CreateImm(flags));
|
||
|
||
return MCDisassembler::Success;
|
||
}
|
||
|
||
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);
|
||
|
||
if (!Check(S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(add));
|
||
|
||
return S;
|
||
}
|
||
|
||
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) + imm32 + 4,
|
||
true, 4, Inst, Decoder))
|
||
Inst.addOperand(MCOperand::CreateImm(imm32));
|
||
return MCDisassembler::Success;
|
||
}
|
||
|
||
static DecodeStatus DecodeCoprocessor(MCInst &Inst, unsigned Val,
|
||
uint64_t Address, const void *Decoder) {
|
||
if (Val == 0xA || Val == 0xB)
|
||
return MCDisassembler::Fail;
|
||
|
||
Inst.addOperand(MCOperand::CreateImm(Val));
|
||
return MCDisassembler::Success;
|
||
}
|
||
|
||
static DecodeStatus
|
||
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);
|
||
|
||
if (Rn == ARM::SP) S = MCDisassembler::SoftFail;
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
return S;
|
||
}
|
||
|
||
static DecodeStatus
|
||
DecodeThumb2BCCInstruction(MCInst &Inst, unsigned Insn,
|
||
uint64_t Address, const void *Decoder) {
|
||
DecodeStatus S = MCDisassembler::Success;
|
||
|
||
unsigned pred = fieldFromInstruction32(Insn, 22, 4);
|
||
if (pred == 0xE || pred == 0xF) {
|
||
unsigned opc = fieldFromInstruction32(Insn, 4, 28);
|
||
switch (opc) {
|
||
default:
|
||
return MCDisassembler::Fail;
|
||
case 0xf3bf8f4:
|
||
Inst.setOpcode(ARM::t2DSB);
|
||
break;
|
||
case 0xf3bf8f5:
|
||
Inst.setOpcode(ARM::t2DMB);
|
||
break;
|
||
case 0xf3bf8f6:
|
||
Inst.setOpcode(ARM::t2ISB);
|
||
break;
|
||
}
|
||
|
||
unsigned imm = fieldFromInstruction32(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;
|
||
|
||
if (!Check(S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
return S;
|
||
}
|
||
|
||
// 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(MCInst &Inst, unsigned Val,
|
||
uint64_t Address, const void *Decoder) {
|
||
unsigned ctrl = fieldFromInstruction32(Val, 10, 2);
|
||
if (ctrl == 0) {
|
||
unsigned byte = fieldFromInstruction32(Val, 8, 2);
|
||
unsigned imm = fieldFromInstruction32(Val, 0, 8);
|
||
switch (byte) {
|
||
case 0:
|
||
Inst.addOperand(MCOperand::CreateImm(imm));
|
||
break;
|
||
case 1:
|
||
Inst.addOperand(MCOperand::CreateImm((imm << 16) | imm));
|
||
break;
|
||
case 2:
|
||
Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 8)));
|
||
break;
|
||
case 3:
|
||
Inst.addOperand(MCOperand::CreateImm((imm << 24) | (imm << 16) |
|
||
(imm << 8) | imm));
|
||
break;
|
||
}
|
||
} else {
|
||
unsigned unrot = fieldFromInstruction32(Val, 0, 7) | 0x80;
|
||
unsigned rot = fieldFromInstruction32(Val, 7, 5);
|
||
unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
|
||
Inst.addOperand(MCOperand::CreateImm(imm));
|
||
}
|
||
|
||
return MCDisassembler::Success;
|
||
}
|
||
|
||
static DecodeStatus
|
||
DecodeThumbBCCTargetOperand(MCInst &Inst, unsigned Val,
|
||
uint64_t Address, const void *Decoder){
|
||
if (!tryAddingSymbolicOperand(Address, Address + SignExtend32<8>(Val<<1) + 4,
|
||
true, 2, Inst, Decoder))
|
||
Inst.addOperand(MCOperand::CreateImm(SignExtend32<8>(Val << 1)));
|
||
return MCDisassembler::Success;
|
||
}
|
||
|
||
static DecodeStatus DecodeThumbBLTargetOperand(MCInst &Inst, unsigned Val,
|
||
uint64_t Address, const void *Decoder){
|
||
// 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(imm32));
|
||
return MCDisassembler::Success;
|
||
}
|
||
|
||
static DecodeStatus DecodeMemBarrierOption(MCInst &Inst, unsigned Val,
|
||
uint64_t Address, const void *Decoder) {
|
||
switch (Val) {
|
||
default:
|
||
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(MCInst &Inst, unsigned Val,
|
||
uint64_t Address, const void *Decoder) {
|
||
if (!Val) return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(Val));
|
||
return MCDisassembler::Success;
|
||
}
|
||
|
||
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);
|
||
|
||
if ((Rt & 1) || Rt == 0xE || Rn == 0xF) return MCDisassembler::Fail;
|
||
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
return S;
|
||
}
|
||
|
||
|
||
static DecodeStatus DecodeDoubleRegStore(MCInst &Inst, unsigned Insn,
|
||
uint64_t Address, const void *Decoder){
|
||
DecodeStatus S = MCDisassembler::Success;
|
||
|
||
unsigned Rd = fieldFromInstruction32(Insn, 12, 4);
|
||
unsigned Rt = fieldFromInstruction32(Insn, 0, 4);
|
||
unsigned Rn = fieldFromInstruction32(Insn, 16, 4);
|
||
unsigned pred = fieldFromInstruction32(Insn, 28, 4);
|
||
|
||
if (!Check(S, DecoderGPRRegisterClass(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 (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
return S;
|
||
}
|
||
|
||
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);
|
||
|
||
if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
|
||
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
return S;
|
||
}
|
||
|
||
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);
|
||
|
||
if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
|
||
if (Rm == 0xF) S = MCDisassembler::SoftFail;
|
||
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
return S;
|
||
}
|
||
|
||
|
||
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);
|
||
|
||
if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
|
||
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
return S;
|
||
}
|
||
|
||
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);
|
||
|
||
if (Rn == 0xF || Rn == Rt) S = MCDisassembler::SoftFail;
|
||
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
return S;
|
||
}
|
||
|
||
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 align = 0;
|
||
unsigned index = 0;
|
||
switch (size) {
|
||
default:
|
||
return MCDisassembler::Fail;
|
||
case 0:
|
||
if (fieldFromInstruction32(Insn, 4, 1))
|
||
return MCDisassembler::Fail; // UNDEFINED
|
||
index = fieldFromInstruction32(Insn, 5, 3);
|
||
break;
|
||
case 1:
|
||
if (fieldFromInstruction32(Insn, 5, 1))
|
||
return MCDisassembler::Fail; // UNDEFINED
|
||
index = fieldFromInstruction32(Insn, 6, 2);
|
||
if (fieldFromInstruction32(Insn, 4, 1))
|
||
align = 2;
|
||
break;
|
||
case 2:
|
||
if (fieldFromInstruction32(Insn, 6, 1))
|
||
return MCDisassembler::Fail; // UNDEFINED
|
||
index = fieldFromInstruction32(Insn, 7, 1);
|
||
if (fieldFromInstruction32(Insn, 4, 2) != 0)
|
||
align = 4;
|
||
}
|
||
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (Rm != 0xF) { // Writeback
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
}
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(align));
|
||
if (Rm != 0xF) {
|
||
if (Rm != 0xD) {
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
} else
|
||
Inst.addOperand(MCOperand::CreateReg(0));
|
||
}
|
||
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(index));
|
||
|
||
return S;
|
||
}
|
||
|
||
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 align = 0;
|
||
unsigned index = 0;
|
||
switch (size) {
|
||
default:
|
||
return MCDisassembler::Fail;
|
||
case 0:
|
||
if (fieldFromInstruction32(Insn, 4, 1))
|
||
return MCDisassembler::Fail; // UNDEFINED
|
||
index = fieldFromInstruction32(Insn, 5, 3);
|
||
break;
|
||
case 1:
|
||
if (fieldFromInstruction32(Insn, 5, 1))
|
||
return MCDisassembler::Fail; // UNDEFINED
|
||
index = fieldFromInstruction32(Insn, 6, 2);
|
||
if (fieldFromInstruction32(Insn, 4, 1))
|
||
align = 2;
|
||
break;
|
||
case 2:
|
||
if (fieldFromInstruction32(Insn, 6, 1))
|
||
return MCDisassembler::Fail; // UNDEFINED
|
||
index = fieldFromInstruction32(Insn, 7, 1);
|
||
if (fieldFromInstruction32(Insn, 4, 2) != 0)
|
||
align = 4;
|
||
}
|
||
|
||
if (Rm != 0xF) { // Writeback
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
}
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(align));
|
||
if (Rm != 0xF) {
|
||
if (Rm != 0xD) {
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
} else
|
||
Inst.addOperand(MCOperand::CreateReg(0));
|
||
}
|
||
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(index));
|
||
|
||
return S;
|
||
}
|
||
|
||
|
||
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 align = 0;
|
||
unsigned index = 0;
|
||
unsigned inc = 1;
|
||
switch (size) {
|
||
default:
|
||
return MCDisassembler::Fail;
|
||
case 0:
|
||
index = fieldFromInstruction32(Insn, 5, 3);
|
||
if (fieldFromInstruction32(Insn, 4, 1))
|
||
align = 2;
|
||
break;
|
||
case 1:
|
||
index = fieldFromInstruction32(Insn, 6, 2);
|
||
if (fieldFromInstruction32(Insn, 4, 1))
|
||
align = 4;
|
||
if (fieldFromInstruction32(Insn, 5, 1))
|
||
inc = 2;
|
||
break;
|
||
case 2:
|
||
if (fieldFromInstruction32(Insn, 5, 1))
|
||
return MCDisassembler::Fail; // UNDEFINED
|
||
index = fieldFromInstruction32(Insn, 7, 1);
|
||
if (fieldFromInstruction32(Insn, 4, 1) != 0)
|
||
align = 8;
|
||
if (fieldFromInstruction32(Insn, 6, 1))
|
||
inc = 2;
|
||
break;
|
||
}
|
||
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (Rm != 0xF) { // Writeback
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
}
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(align));
|
||
if (Rm != 0xF) {
|
||
if (Rm != 0xD) {
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
} else
|
||
Inst.addOperand(MCOperand::CreateReg(0));
|
||
}
|
||
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(index));
|
||
|
||
return S;
|
||
}
|
||
|
||
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 align = 0;
|
||
unsigned index = 0;
|
||
unsigned inc = 1;
|
||
switch (size) {
|
||
default:
|
||
return MCDisassembler::Fail;
|
||
case 0:
|
||
index = fieldFromInstruction32(Insn, 5, 3);
|
||
if (fieldFromInstruction32(Insn, 4, 1))
|
||
align = 2;
|
||
break;
|
||
case 1:
|
||
index = fieldFromInstruction32(Insn, 6, 2);
|
||
if (fieldFromInstruction32(Insn, 4, 1))
|
||
align = 4;
|
||
if (fieldFromInstruction32(Insn, 5, 1))
|
||
inc = 2;
|
||
break;
|
||
case 2:
|
||
if (fieldFromInstruction32(Insn, 5, 1))
|
||
return MCDisassembler::Fail; // UNDEFINED
|
||
index = fieldFromInstruction32(Insn, 7, 1);
|
||
if (fieldFromInstruction32(Insn, 4, 1) != 0)
|
||
align = 8;
|
||
if (fieldFromInstruction32(Insn, 6, 1))
|
||
inc = 2;
|
||
break;
|
||
}
|
||
|
||
if (Rm != 0xF) { // Writeback
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
}
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(align));
|
||
if (Rm != 0xF) {
|
||
if (Rm != 0xD) {
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
} else
|
||
Inst.addOperand(MCOperand::CreateReg(0));
|
||
}
|
||
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(index));
|
||
|
||
return S;
|
||
}
|
||
|
||
|
||
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 align = 0;
|
||
unsigned index = 0;
|
||
unsigned inc = 1;
|
||
switch (size) {
|
||
default:
|
||
return MCDisassembler::Fail;
|
||
case 0:
|
||
if (fieldFromInstruction32(Insn, 4, 1))
|
||
return MCDisassembler::Fail; // UNDEFINED
|
||
index = fieldFromInstruction32(Insn, 5, 3);
|
||
break;
|
||
case 1:
|
||
if (fieldFromInstruction32(Insn, 4, 1))
|
||
return MCDisassembler::Fail; // UNDEFINED
|
||
index = fieldFromInstruction32(Insn, 6, 2);
|
||
if (fieldFromInstruction32(Insn, 5, 1))
|
||
inc = 2;
|
||
break;
|
||
case 2:
|
||
if (fieldFromInstruction32(Insn, 4, 2))
|
||
return MCDisassembler::Fail; // UNDEFINED
|
||
index = fieldFromInstruction32(Insn, 7, 1);
|
||
if (fieldFromInstruction32(Insn, 6, 1))
|
||
inc = 2;
|
||
break;
|
||
}
|
||
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
if (Rm != 0xF) { // Writeback
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
}
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(align));
|
||
if (Rm != 0xF) {
|
||
if (Rm != 0xD) {
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
} else
|
||
Inst.addOperand(MCOperand::CreateReg(0));
|
||
}
|
||
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(index));
|
||
|
||
return S;
|
||
}
|
||
|
||
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 align = 0;
|
||
unsigned index = 0;
|
||
unsigned inc = 1;
|
||
switch (size) {
|
||
default:
|
||
return MCDisassembler::Fail;
|
||
case 0:
|
||
if (fieldFromInstruction32(Insn, 4, 1))
|
||
return MCDisassembler::Fail; // UNDEFINED
|
||
index = fieldFromInstruction32(Insn, 5, 3);
|
||
break;
|
||
case 1:
|
||
if (fieldFromInstruction32(Insn, 4, 1))
|
||
return MCDisassembler::Fail; // UNDEFINED
|
||
index = fieldFromInstruction32(Insn, 6, 2);
|
||
if (fieldFromInstruction32(Insn, 5, 1))
|
||
inc = 2;
|
||
break;
|
||
case 2:
|
||
if (fieldFromInstruction32(Insn, 4, 2))
|
||
return MCDisassembler::Fail; // UNDEFINED
|
||
index = fieldFromInstruction32(Insn, 7, 1);
|
||
if (fieldFromInstruction32(Insn, 6, 1))
|
||
inc = 2;
|
||
break;
|
||
}
|
||
|
||
if (Rm != 0xF) { // Writeback
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
}
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(align));
|
||
if (Rm != 0xF) {
|
||
if (Rm != 0xD) {
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
} else
|
||
Inst.addOperand(MCOperand::CreateReg(0));
|
||
}
|
||
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(index));
|
||
|
||
return S;
|
||
}
|
||
|
||
|
||
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 align = 0;
|
||
unsigned index = 0;
|
||
unsigned inc = 1;
|
||
switch (size) {
|
||
default:
|
||
return MCDisassembler::Fail;
|
||
case 0:
|
||
if (fieldFromInstruction32(Insn, 4, 1))
|
||
align = 4;
|
||
index = fieldFromInstruction32(Insn, 5, 3);
|
||
break;
|
||
case 1:
|
||
if (fieldFromInstruction32(Insn, 4, 1))
|
||
align = 8;
|
||
index = fieldFromInstruction32(Insn, 6, 2);
|
||
if (fieldFromInstruction32(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))
|
||
inc = 2;
|
||
break;
|
||
}
|
||
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
if (Rm != 0xF) { // Writeback
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
}
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(align));
|
||
if (Rm != 0xF) {
|
||
if (Rm != 0xD) {
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
} else
|
||
Inst.addOperand(MCOperand::CreateReg(0));
|
||
}
|
||
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(index));
|
||
|
||
return S;
|
||
}
|
||
|
||
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 align = 0;
|
||
unsigned index = 0;
|
||
unsigned inc = 1;
|
||
switch (size) {
|
||
default:
|
||
return MCDisassembler::Fail;
|
||
case 0:
|
||
if (fieldFromInstruction32(Insn, 4, 1))
|
||
align = 4;
|
||
index = fieldFromInstruction32(Insn, 5, 3);
|
||
break;
|
||
case 1:
|
||
if (fieldFromInstruction32(Insn, 4, 1))
|
||
align = 8;
|
||
index = fieldFromInstruction32(Insn, 6, 2);
|
||
if (fieldFromInstruction32(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))
|
||
inc = 2;
|
||
break;
|
||
}
|
||
|
||
if (Rm != 0xF) { // Writeback
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
}
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(align));
|
||
if (Rm != 0xF) {
|
||
if (Rm != 0xD) {
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
} else
|
||
Inst.addOperand(MCOperand::CreateReg(0));
|
||
}
|
||
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(index));
|
||
|
||
return S;
|
||
}
|
||
|
||
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;
|
||
|
||
if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
|
||
S = MCDisassembler::SoftFail;
|
||
|
||
if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
return S;
|
||
}
|
||
|
||
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;
|
||
|
||
if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
|
||
S = MCDisassembler::SoftFail;
|
||
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
return S;
|
||
}
|
||
|
||
static DecodeStatus DecodeIT(MCInst &Inst, unsigned Insn,
|
||
uint64_t Address, const void *Decoder) {
|
||
DecodeStatus S = MCDisassembler::Success;
|
||
unsigned pred = fieldFromInstruction16(Insn, 4, 4);
|
||
unsigned mask = fieldFromInstruction16(Insn, 0, 4);
|
||
|
||
if (pred == 0xF) {
|
||
pred = 0xE;
|
||
S = MCDisassembler::SoftFail;
|
||
}
|
||
|
||
if (mask == 0x0) {
|
||
mask |= 0x8;
|
||
S = MCDisassembler::SoftFail;
|
||
}
|
||
|
||
Inst.addOperand(MCOperand::CreateImm(pred));
|
||
Inst.addOperand(MCOperand::CreateImm(mask));
|
||
return S;
|
||
}
|
||
|
||
static DecodeStatus
|
||
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);
|
||
bool writeback = (W == 1) | (P == 0);
|
||
|
||
addr |= (U << 8) | (Rn << 9);
|
||
|
||
if (writeback && (Rn == Rt || Rn == Rt2))
|
||
Check(S, MCDisassembler::SoftFail);
|
||
if (Rt == Rt2)
|
||
Check(S, MCDisassembler::SoftFail);
|
||
|
||
// Rt
|
||
if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
// Rt2
|
||
if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
// Writeback operand
|
||
if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
// addr
|
||
if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
return S;
|
||
}
|
||
|
||
static DecodeStatus
|
||
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);
|
||
bool writeback = (W == 1) | (P == 0);
|
||
|
||
addr |= (U << 8) | (Rn << 9);
|
||
|
||
if (writeback && (Rn == Rt || Rn == Rt2))
|
||
Check(S, MCDisassembler::SoftFail);
|
||
|
||
// Writeback operand
|
||
if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
// Rt
|
||
if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
// Rt2
|
||
if (!Check(S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
// addr
|
||
if (!Check(S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
|
||
return S;
|
||
}
|
||
|
||
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);
|
||
if (sign1 != sign2) return MCDisassembler::Fail;
|
||
|
||
unsigned Val = fieldFromInstruction32(Insn, 0, 8);
|
||
Val |= fieldFromInstruction32(Insn, 12, 3) << 8;
|
||
Val |= fieldFromInstruction32(Insn, 26, 1) << 11;
|
||
Val |= sign1 << 12;
|
||
Inst.addOperand(MCOperand::CreateImm(SignExtend32<13>(Val)));
|
||
|
||
return MCDisassembler::Success;
|
||
}
|
||
|
||
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;
|
||
Inst.addOperand(MCOperand::CreateImm(Val));
|
||
return S;
|
||
}
|
||
|
||
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);
|
||
|
||
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 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 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);
|
||
|
||
DecodeStatus S = MCDisassembler::Success;
|
||
|
||
// VMOVv2f32 is ambiguous with these decodings.
|
||
if (!(imm & 0x38) && cmode == 0xF) {
|
||
Inst.setOpcode(ARM::VMOVv2f32);
|
||
return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
|
||
}
|
||
|
||
if (!(imm & 0x20)) Check(S, MCDisassembler::SoftFail);
|
||
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeDPRRegisterClass(Inst, Vm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(64 - imm));
|
||
|
||
return S;
|
||
}
|
||
|
||
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);
|
||
|
||
DecodeStatus S = MCDisassembler::Success;
|
||
|
||
// VMOVv4f32 is ambiguous with these decodings.
|
||
if (!(imm & 0x38) && cmode == 0xF) {
|
||
Inst.setOpcode(ARM::VMOVv4f32);
|
||
return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
|
||
}
|
||
|
||
if (!(imm & 0x20)) Check(S, MCDisassembler::SoftFail);
|
||
|
||
if (!Check(S, DecodeQPRRegisterClass(Inst, Vd, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
if (!Check(S, DecodeQPRRegisterClass(Inst, Vm, Address, Decoder)))
|
||
return MCDisassembler::Fail;
|
||
Inst.addOperand(MCOperand::CreateImm(64 - imm));
|
||
|
||
return S;
|
||
}
|
||
|
||
static DecodeStatus DecodeLDR(MCInst &Inst, unsigned Val,
|
||
uint64_t Address, const void *Decoder) {
|
||
DecodeStatus S = MCDisassembler::Success;
|
||
|
||
unsigned Rn = fieldFromInstruction32(Val, 16, 4);
|
||
unsigned Rt = fieldFromInstruction32(Val, 12, 4);
|
||
unsigned Rm = fieldFromInstruction32(Val, 0, 4);
|
||
Rm |= (fieldFromInstruction32(Val, 23, 1) << 4);
|
||
unsigned Cond = fieldFromInstruction32(Val, 28, 4);
|
||
|
||
if (fieldFromInstruction32(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 = fieldFromInstruction32(Val, 0, 4);
|
||
unsigned opc1 = fieldFromInstruction32(Val, 4, 4);
|
||
unsigned cop = fieldFromInstruction32(Val, 8, 4);
|
||
unsigned Rt = fieldFromInstruction32(Val, 12, 4);
|
||
unsigned Rt2 = fieldFromInstruction32(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;
|
||
}
|
||
|