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llvm-project/llvm/lib/Target/Hexagon/Disassembler/HexagonDisassembler.cpp

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//===-- HexagonDisassembler.cpp - Disassembler for Hexagon ISA ------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "hexagon-disassembler"
#include "Hexagon.h"
#include "MCTargetDesc/HexagonBaseInfo.h"
#include "MCTargetDesc/HexagonMCChecker.h"
#include "MCTargetDesc/HexagonMCTargetDesc.h"
#include "MCTargetDesc/HexagonMCInstrInfo.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/MC/MCDisassembler/MCDisassembler.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCFixedLenDisassembler.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/TargetRegistry.h"
#include <cassert>
#include <cstddef>
#include <cstdint>
#include <memory>
using namespace llvm;
using namespace Hexagon;
typedef MCDisassembler::DecodeStatus DecodeStatus;
namespace {
/// \brief Hexagon disassembler for all Hexagon platforms.
class HexagonDisassembler : public MCDisassembler {
public:
std::unique_ptr<MCInstrInfo const> const MCII;
std::unique_ptr<MCInst *> CurrentBundle;
HexagonDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx,
MCInstrInfo const *MCII)
: MCDisassembler(STI, Ctx), MCII(MCII), CurrentBundle(new MCInst *) {}
DecodeStatus getSingleInstruction(MCInst &Instr, MCInst &MCB,
ArrayRef<uint8_t> Bytes, uint64_t Address,
raw_ostream &VStream, raw_ostream &CStream,
bool &Complete) const;
DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size,
ArrayRef<uint8_t> Bytes, uint64_t Address,
raw_ostream &VStream,
raw_ostream &CStream) const override;
void adjustExtendedInstructions(MCInst &MCI, MCInst const &MCB) const;
void addSubinstOperands(MCInst *MI, unsigned opcode, unsigned inst) const;
};
} // end anonymous namespace
// Forward declare these because the auto-generated code will reference them.
// Definitions are further down.
static DecodeStatus DecodeIntRegsRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeIntRegsLow8RegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeVectorRegsRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeDoubleRegsRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeVecDblRegsRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodePredRegsRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeVecPredRegsRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeCtrRegsRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeModRegsRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus DecodeCtrRegs64RegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder);
static DecodeStatus decodeSpecial(MCInst &MI, uint32_t insn);
static DecodeStatus decodeImmext(MCInst &MI, uint32_t insn,
void const *Decoder);
static unsigned GetSubinstOpcode(unsigned IClass, unsigned inst, unsigned &op,
raw_ostream &os);
static unsigned getRegFromSubinstEncoding(unsigned encoded_reg);
static DecodeStatus unsignedImmDecoder(MCInst &MI, unsigned tmp,
uint64_t Address, const void *Decoder);
static DecodeStatus s16_0ImmDecoder(MCInst &MI, unsigned tmp, uint64_t Address,
const void *Decoder);
static DecodeStatus s12_0ImmDecoder(MCInst &MI, unsigned tmp, uint64_t Address,
const void *Decoder);
static DecodeStatus s11_0ImmDecoder(MCInst &MI, unsigned tmp, uint64_t Address,
const void *Decoder);
static DecodeStatus s11_1ImmDecoder(MCInst &MI, unsigned tmp, uint64_t Address,
const void *Decoder);
static DecodeStatus s11_2ImmDecoder(MCInst &MI, unsigned tmp, uint64_t Address,
const void *Decoder);
static DecodeStatus s11_3ImmDecoder(MCInst &MI, unsigned tmp, uint64_t Address,
const void *Decoder);
static DecodeStatus s10_0ImmDecoder(MCInst &MI, unsigned tmp, uint64_t Address,
const void *Decoder);
static DecodeStatus s8_0ImmDecoder(MCInst &MI, unsigned tmp, uint64_t Address,
const void *Decoder);
static DecodeStatus s6_0ImmDecoder(MCInst &MI, unsigned tmp, uint64_t Address,
const void *Decoder);
static DecodeStatus s4_0ImmDecoder(MCInst &MI, unsigned tmp, uint64_t Address,
const void *Decoder);
static DecodeStatus s4_1ImmDecoder(MCInst &MI, unsigned tmp, uint64_t Address,
const void *Decoder);
static DecodeStatus s4_2ImmDecoder(MCInst &MI, unsigned tmp, uint64_t Address,
const void *Decoder);
static DecodeStatus s4_3ImmDecoder(MCInst &MI, unsigned tmp, uint64_t Address,
const void *Decoder);
static DecodeStatus s4_6ImmDecoder(MCInst &MI, unsigned tmp, uint64_t Address,
const void *Decoder);
static DecodeStatus s3_6ImmDecoder(MCInst &MI, unsigned tmp, uint64_t Address,
const void *Decoder);
static DecodeStatus brtargetDecoder(MCInst &MI, unsigned tmp, uint64_t Address,
const void *Decoder);
#include "HexagonGenDisassemblerTables.inc"
static MCDisassembler *createHexagonDisassembler(const Target &T,
const MCSubtargetInfo &STI,
MCContext &Ctx) {
return new HexagonDisassembler(STI, Ctx, T.createMCInstrInfo());
}
extern "C" void LLVMInitializeHexagonDisassembler() {
TargetRegistry::RegisterMCDisassembler(getTheHexagonTarget(),
createHexagonDisassembler);
}
DecodeStatus HexagonDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
ArrayRef<uint8_t> Bytes,
uint64_t Address,
raw_ostream &os,
raw_ostream &cs) const {
DecodeStatus Result = DecodeStatus::Success;
bool Complete = false;
Size = 0;
*CurrentBundle = &MI;
MI = HexagonMCInstrInfo::createBundle();
while (Result == Success && !Complete) {
if (Bytes.size() < HEXAGON_INSTR_SIZE)
return MCDisassembler::Fail;
MCInst *Inst = new (getContext()) MCInst;
Result = getSingleInstruction(*Inst, MI, Bytes, Address, os, cs, Complete);
MI.addOperand(MCOperand::createInst(Inst));
Size += HEXAGON_INSTR_SIZE;
Bytes = Bytes.slice(HEXAGON_INSTR_SIZE);
}
if(Result == MCDisassembler::Fail)
return Result;
HexagonMCChecker Checker (*MCII, STI, MI, MI, *getContext().getRegisterInfo());
if(!Checker.check())
return MCDisassembler::Fail;
return MCDisassembler::Success;
}
static HexagonDisassembler const &disassembler(void const *Decoder) {
return *static_cast<HexagonDisassembler const *>(Decoder);
}
static MCContext &contextFromDecoder(void const *Decoder) {
return disassembler(Decoder).getContext();
}
DecodeStatus HexagonDisassembler::getSingleInstruction(
MCInst &MI, MCInst &MCB, ArrayRef<uint8_t> Bytes, uint64_t Address,
raw_ostream &os, raw_ostream &cs, bool &Complete) const {
assert(Bytes.size() >= HEXAGON_INSTR_SIZE);
uint32_t Instruction =
(Bytes[3] << 24) | (Bytes[2] << 16) | (Bytes[1] << 8) | (Bytes[0] << 0);
auto BundleSize = HexagonMCInstrInfo::bundleSize(MCB);
if ((Instruction & HexagonII::INST_PARSE_MASK) ==
HexagonII::INST_PARSE_LOOP_END) {
if (BundleSize == 0)
HexagonMCInstrInfo::setInnerLoop(MCB);
else if (BundleSize == 1)
HexagonMCInstrInfo::setOuterLoop(MCB);
else
return DecodeStatus::Fail;
}
DecodeStatus Result = DecodeStatus::Success;
if ((Instruction & HexagonII::INST_PARSE_MASK) ==
HexagonII::INST_PARSE_DUPLEX) {
// Determine the instruction class of each instruction in the duplex.
unsigned duplexIClass, IClassLow, IClassHigh;
duplexIClass = ((Instruction >> 28) & 0xe) | ((Instruction >> 13) & 0x1);
switch (duplexIClass) {
default:
return MCDisassembler::Fail;
case 0:
IClassLow = HexagonII::HSIG_L1;
IClassHigh = HexagonII::HSIG_L1;
break;
case 1:
IClassLow = HexagonII::HSIG_L2;
IClassHigh = HexagonII::HSIG_L1;
break;
case 2:
IClassLow = HexagonII::HSIG_L2;
IClassHigh = HexagonII::HSIG_L2;
break;
case 3:
IClassLow = HexagonII::HSIG_A;
IClassHigh = HexagonII::HSIG_A;
break;
case 4:
IClassLow = HexagonII::HSIG_L1;
IClassHigh = HexagonII::HSIG_A;
break;
case 5:
IClassLow = HexagonII::HSIG_L2;
IClassHigh = HexagonII::HSIG_A;
break;
case 6:
IClassLow = HexagonII::HSIG_S1;
IClassHigh = HexagonII::HSIG_A;
break;
case 7:
IClassLow = HexagonII::HSIG_S2;
IClassHigh = HexagonII::HSIG_A;
break;
case 8:
IClassLow = HexagonII::HSIG_S1;
IClassHigh = HexagonII::HSIG_L1;
break;
case 9:
IClassLow = HexagonII::HSIG_S1;
IClassHigh = HexagonII::HSIG_L2;
break;
case 10:
IClassLow = HexagonII::HSIG_S1;
IClassHigh = HexagonII::HSIG_S1;
break;
case 11:
IClassLow = HexagonII::HSIG_S2;
IClassHigh = HexagonII::HSIG_S1;
break;
case 12:
IClassLow = HexagonII::HSIG_S2;
IClassHigh = HexagonII::HSIG_L1;
break;
case 13:
IClassLow = HexagonII::HSIG_S2;
IClassHigh = HexagonII::HSIG_L2;
break;
case 14:
IClassLow = HexagonII::HSIG_S2;
IClassHigh = HexagonII::HSIG_S2;
break;
}
// Set the MCInst to be a duplex instruction. Which one doesn't matter.
MI.setOpcode(Hexagon::DuplexIClass0);
// Decode each instruction in the duplex.
// Create an MCInst for each instruction.
unsigned instLow = Instruction & 0x1fff;
unsigned instHigh = (Instruction >> 16) & 0x1fff;
unsigned opLow;
if (GetSubinstOpcode(IClassLow, instLow, opLow, os) !=
MCDisassembler::Success)
return MCDisassembler::Fail;
unsigned opHigh;
if (GetSubinstOpcode(IClassHigh, instHigh, opHigh, os) !=
MCDisassembler::Success)
return MCDisassembler::Fail;
MCInst *MILow = new (getContext()) MCInst;
MILow->setOpcode(opLow);
MCInst *MIHigh = new (getContext()) MCInst;
MIHigh->setOpcode(opHigh);
addSubinstOperands(MILow, opLow, instLow);
addSubinstOperands(MIHigh, opHigh, instHigh);
// see ConvertToSubInst() in
// lib/Target/Hexagon/MCTargetDesc/HexagonMCDuplexInfo.cpp
// Add the duplex instruction MCInsts as operands to the passed in MCInst.
MCOperand OPLow = MCOperand::createInst(MILow);
MCOperand OPHigh = MCOperand::createInst(MIHigh);
MI.addOperand(OPLow);
MI.addOperand(OPHigh);
Complete = true;
} else {
if ((Instruction & HexagonII::INST_PARSE_MASK) ==
HexagonII::INST_PARSE_PACKET_END)
Complete = true;
// Calling the auto-generated decoder function.
Result =
decodeInstruction(DecoderTable32, MI, Instruction, Address, this, STI);
// If a, "standard" insn isn't found check special cases.
if (MCDisassembler::Success != Result ||
MI.getOpcode() == Hexagon::A4_ext) {
Result = decodeImmext(MI, Instruction, this);
if (MCDisassembler::Success != Result) {
Result = decodeSpecial(MI, Instruction);
}
} else {
// If the instruction is a compound instruction, register values will
// follow the duplex model, so the register values in the MCInst are
// incorrect. If the instruction is a compound, loop through the
// operands and change registers appropriately.
if (HexagonMCInstrInfo::getType(*MCII, MI) == HexagonII::TypeCOMPOUND) {
for (MCInst::iterator i = MI.begin(), last = MI.end(); i < last; ++i) {
if (i->isReg()) {
unsigned reg = i->getReg() - Hexagon::R0;
i->setReg(getRegFromSubinstEncoding(reg));
}
}
}
}
}
switch(MI.getOpcode()) {
case Hexagon::J4_cmpeqn1_f_jumpnv_nt:
case Hexagon::J4_cmpeqn1_f_jumpnv_t:
case Hexagon::J4_cmpeqn1_fp0_jump_nt:
case Hexagon::J4_cmpeqn1_fp0_jump_t:
case Hexagon::J4_cmpeqn1_fp1_jump_nt:
case Hexagon::J4_cmpeqn1_fp1_jump_t:
case Hexagon::J4_cmpeqn1_t_jumpnv_nt:
case Hexagon::J4_cmpeqn1_t_jumpnv_t:
case Hexagon::J4_cmpeqn1_tp0_jump_nt:
case Hexagon::J4_cmpeqn1_tp0_jump_t:
case Hexagon::J4_cmpeqn1_tp1_jump_nt:
case Hexagon::J4_cmpeqn1_tp1_jump_t:
case Hexagon::J4_cmpgtn1_f_jumpnv_nt:
case Hexagon::J4_cmpgtn1_f_jumpnv_t:
case Hexagon::J4_cmpgtn1_fp0_jump_nt:
case Hexagon::J4_cmpgtn1_fp0_jump_t:
case Hexagon::J4_cmpgtn1_fp1_jump_nt:
case Hexagon::J4_cmpgtn1_fp1_jump_t:
case Hexagon::J4_cmpgtn1_t_jumpnv_nt:
case Hexagon::J4_cmpgtn1_t_jumpnv_t:
case Hexagon::J4_cmpgtn1_tp0_jump_nt:
case Hexagon::J4_cmpgtn1_tp0_jump_t:
case Hexagon::J4_cmpgtn1_tp1_jump_nt:
case Hexagon::J4_cmpgtn1_tp1_jump_t:
MI.insert(MI.begin() + 1, MCOperand::createExpr(MCConstantExpr::create(-1, getContext())));
break;
default:
break;
}
if (HexagonMCInstrInfo::isNewValue(*MCII, MI)) {
unsigned OpIndex = HexagonMCInstrInfo::getNewValueOp(*MCII, MI);
MCOperand &MCO = MI.getOperand(OpIndex);
assert(MCO.isReg() && "New value consumers must be registers");
unsigned Register =
getContext().getRegisterInfo()->getEncodingValue(MCO.getReg());
if ((Register & 0x6) == 0)
// HexagonPRM 10.11 Bit 1-2 == 0 is reserved
return MCDisassembler::Fail;
unsigned Lookback = (Register & 0x6) >> 1;
unsigned Offset = 1;
bool Vector = HexagonMCInstrInfo::isVector(*MCII, MI);
auto Instructions = HexagonMCInstrInfo::bundleInstructions(**CurrentBundle);
auto i = Instructions.end() - 1;
for (auto n = Instructions.begin() - 1;; --i, ++Offset) {
if (i == n)
// Couldn't find producer
return MCDisassembler::Fail;
if (Vector && !HexagonMCInstrInfo::isVector(*MCII, *i->getInst()))
// Skip scalars when calculating distances for vectors
++Lookback;
if (HexagonMCInstrInfo::isImmext(*i->getInst()))
++Lookback;
if (Offset == Lookback)
break;
}
auto const &Inst = *i->getInst();
bool SubregBit = (Register & 0x1) != 0;
if (SubregBit && HexagonMCInstrInfo::hasNewValue2(*MCII, Inst)) {
// If subreg bit is set we're selecting the second produced newvalue
unsigned Producer =
HexagonMCInstrInfo::getNewValueOperand2(*MCII, Inst).getReg();
assert(Producer != Hexagon::NoRegister);
MCO.setReg(Producer);
} else if (HexagonMCInstrInfo::hasNewValue(*MCII, Inst)) {
unsigned Producer =
HexagonMCInstrInfo::getNewValueOperand(*MCII, Inst).getReg();
if (Producer >= Hexagon::W0 && Producer <= Hexagon::W15)
Producer = ((Producer - Hexagon::W0) << 1) + SubregBit + Hexagon::V0;
else if (SubregBit)
// Hexagon PRM 10.11 New-value operands
// Nt[0] is reserved and should always be encoded as zero.
return MCDisassembler::Fail;
assert(Producer != Hexagon::NoRegister);
MCO.setReg(Producer);
} else
return MCDisassembler::Fail;
}
adjustExtendedInstructions(MI, MCB);
MCInst const *Extender =
HexagonMCInstrInfo::extenderForIndex(MCB,
HexagonMCInstrInfo::bundleSize(MCB));
if(Extender != nullptr) {
MCInst const & Inst = HexagonMCInstrInfo::isDuplex(*MCII, MI) ?
*MI.getOperand(1).getInst() : MI;
if (!HexagonMCInstrInfo::isExtendable(*MCII, Inst) &&
!HexagonMCInstrInfo::isExtended(*MCII, Inst))
return MCDisassembler::Fail;
}
return Result;
}
void HexagonDisassembler::adjustExtendedInstructions(MCInst &MCI,
MCInst const &MCB) const {
if (!HexagonMCInstrInfo::hasExtenderForIndex(
MCB, HexagonMCInstrInfo::bundleSize(MCB))) {
unsigned opcode;
// This code is used by the disassembler to disambiguate between GP
// relative and absolute addressing instructions since they both have
// same encoding bits. However, an absolute addressing instruction must
// follow an immediate extender. Disassembler alwaus select absolute
// addressing instructions first and uses this code to change them into
// GP relative instruction in the absence of the corresponding immediate
// extender.
switch (MCI.getOpcode()) {
case Hexagon::PS_storerbabs:
opcode = Hexagon::S2_storerbgp;
break;
case Hexagon::PS_storerhabs:
opcode = Hexagon::S2_storerhgp;
break;
case Hexagon::PS_storerfabs:
opcode = Hexagon::S2_storerfgp;
break;
case Hexagon::PS_storeriabs:
opcode = Hexagon::S2_storerigp;
break;
case Hexagon::PS_storerbnewabs:
opcode = Hexagon::S2_storerbnewgp;
break;
case Hexagon::PS_storerhnewabs:
opcode = Hexagon::S2_storerhnewgp;
break;
case Hexagon::PS_storerinewabs:
opcode = Hexagon::S2_storerinewgp;
break;
case Hexagon::PS_storerdabs:
opcode = Hexagon::S2_storerdgp;
break;
case Hexagon::PS_loadrbabs:
opcode = Hexagon::L2_loadrbgp;
break;
case Hexagon::PS_loadrubabs:
opcode = Hexagon::L2_loadrubgp;
break;
case Hexagon::PS_loadrhabs:
opcode = Hexagon::L2_loadrhgp;
break;
case Hexagon::PS_loadruhabs:
opcode = Hexagon::L2_loadruhgp;
break;
case Hexagon::PS_loadriabs:
opcode = Hexagon::L2_loadrigp;
break;
case Hexagon::PS_loadrdabs:
opcode = Hexagon::L2_loadrdgp;
break;
default:
opcode = MCI.getOpcode();
}
MCI.setOpcode(opcode);
}
}
static DecodeStatus DecodeRegisterClass(MCInst &Inst, unsigned RegNo,
ArrayRef<MCPhysReg> Table) {
if (RegNo < Table.size()) {
Inst.addOperand(MCOperand::createReg(Table[RegNo]));
return MCDisassembler::Success;
}
return MCDisassembler::Fail;
}
static DecodeStatus DecodeIntRegsLow8RegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder) {
return DecodeIntRegsRegisterClass(Inst, RegNo, Address, Decoder);
}
static DecodeStatus DecodeIntRegsRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address,
const void *Decoder) {
static const MCPhysReg IntRegDecoderTable[] = {
Hexagon::R0, Hexagon::R1, Hexagon::R2, Hexagon::R3, Hexagon::R4,
Hexagon::R5, Hexagon::R6, Hexagon::R7, Hexagon::R8, Hexagon::R9,
Hexagon::R10, Hexagon::R11, Hexagon::R12, Hexagon::R13, Hexagon::R14,
Hexagon::R15, Hexagon::R16, Hexagon::R17, Hexagon::R18, Hexagon::R19,
Hexagon::R20, Hexagon::R21, Hexagon::R22, Hexagon::R23, Hexagon::R24,
Hexagon::R25, Hexagon::R26, Hexagon::R27, Hexagon::R28, Hexagon::R29,
Hexagon::R30, Hexagon::R31};
return DecodeRegisterClass(Inst, RegNo, IntRegDecoderTable);
}
static DecodeStatus DecodeVectorRegsRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t /*Address*/,
const void *Decoder) {
static const MCPhysReg VecRegDecoderTable[] = {
Hexagon::V0, Hexagon::V1, Hexagon::V2, Hexagon::V3, Hexagon::V4,
Hexagon::V5, Hexagon::V6, Hexagon::V7, Hexagon::V8, Hexagon::V9,
Hexagon::V10, Hexagon::V11, Hexagon::V12, Hexagon::V13, Hexagon::V14,
Hexagon::V15, Hexagon::V16, Hexagon::V17, Hexagon::V18, Hexagon::V19,
Hexagon::V20, Hexagon::V21, Hexagon::V22, Hexagon::V23, Hexagon::V24,
Hexagon::V25, Hexagon::V26, Hexagon::V27, Hexagon::V28, Hexagon::V29,
Hexagon::V30, Hexagon::V31};
return DecodeRegisterClass(Inst, RegNo, VecRegDecoderTable);
}
static DecodeStatus DecodeDoubleRegsRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t /*Address*/,
const void *Decoder) {
static const MCPhysReg DoubleRegDecoderTable[] = {
Hexagon::D0, Hexagon::D1, Hexagon::D2, Hexagon::D3,
Hexagon::D4, Hexagon::D5, Hexagon::D6, Hexagon::D7,
Hexagon::D8, Hexagon::D9, Hexagon::D10, Hexagon::D11,
Hexagon::D12, Hexagon::D13, Hexagon::D14, Hexagon::D15};
return DecodeRegisterClass(Inst, RegNo >> 1, DoubleRegDecoderTable);
}
static DecodeStatus DecodeVecDblRegsRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t /*Address*/,
const void *Decoder) {
static const MCPhysReg VecDblRegDecoderTable[] = {
Hexagon::W0, Hexagon::W1, Hexagon::W2, Hexagon::W3,
Hexagon::W4, Hexagon::W5, Hexagon::W6, Hexagon::W7,
Hexagon::W8, Hexagon::W9, Hexagon::W10, Hexagon::W11,
Hexagon::W12, Hexagon::W13, Hexagon::W14, Hexagon::W15};
return (DecodeRegisterClass(Inst, RegNo >> 1, VecDblRegDecoderTable));
}
static DecodeStatus DecodePredRegsRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t /*Address*/,
const void *Decoder) {
static const MCPhysReg PredRegDecoderTable[] = {Hexagon::P0, Hexagon::P1,
Hexagon::P2, Hexagon::P3};
return DecodeRegisterClass(Inst, RegNo, PredRegDecoderTable);
}
static DecodeStatus DecodeVecPredRegsRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t /*Address*/,
const void *Decoder) {
static const MCPhysReg VecPredRegDecoderTable[] = {Hexagon::Q0, Hexagon::Q1,
Hexagon::Q2, Hexagon::Q3};
return DecodeRegisterClass(Inst, RegNo, VecPredRegDecoderTable);
}
static DecodeStatus DecodeCtrRegsRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t /*Address*/,
const void *Decoder) {
static const MCPhysReg CtrlRegDecoderTable[] = {
Hexagon::SA0, Hexagon::LC0, Hexagon::SA1, Hexagon::LC1,
Hexagon::P3_0, Hexagon::C5, Hexagon::C6, Hexagon::C7,
Hexagon::USR, Hexagon::PC, Hexagon::UGP, Hexagon::GP,
Hexagon::CS0, Hexagon::CS1, Hexagon::UPCL, Hexagon::UPC
};
if (RegNo >= array_lengthof(CtrlRegDecoderTable))
return MCDisassembler::Fail;
if (CtrlRegDecoderTable[RegNo] == Hexagon::NoRegister)
return MCDisassembler::Fail;
unsigned Register = CtrlRegDecoderTable[RegNo];
Inst.addOperand(MCOperand::createReg(Register));
return MCDisassembler::Success;
}
static DecodeStatus DecodeCtrRegs64RegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t /*Address*/,
const void *Decoder) {
static const MCPhysReg CtrlReg64DecoderTable[] = {
Hexagon::C1_0, Hexagon::NoRegister,
Hexagon::C3_2, Hexagon::NoRegister,
Hexagon::C7_6, Hexagon::NoRegister,
Hexagon::C9_8, Hexagon::NoRegister,
Hexagon::C11_10, Hexagon::NoRegister,
Hexagon::CS, Hexagon::NoRegister,
Hexagon::UPC, Hexagon::NoRegister
};
if (RegNo >= array_lengthof(CtrlReg64DecoderTable))
return MCDisassembler::Fail;
if (CtrlReg64DecoderTable[RegNo] == Hexagon::NoRegister)
return MCDisassembler::Fail;
unsigned Register = CtrlReg64DecoderTable[RegNo];
Inst.addOperand(MCOperand::createReg(Register));
return MCDisassembler::Success;
}
static DecodeStatus DecodeModRegsRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t /*Address*/,
const void *Decoder) {
unsigned Register = 0;
switch (RegNo) {
case 0:
Register = Hexagon::M0;
break;
case 1:
Register = Hexagon::M1;
break;
default:
return MCDisassembler::Fail;
}
Inst.addOperand(MCOperand::createReg(Register));
return MCDisassembler::Success;
}
static uint32_t fullValue(MCInstrInfo const &MCII, MCInst &MCB, MCInst &MI,
int64_t Value) {
MCInst const *Extender = HexagonMCInstrInfo::extenderForIndex(
MCB, HexagonMCInstrInfo::bundleSize(MCB));
if(!Extender || MI.size() != HexagonMCInstrInfo::getExtendableOp(MCII, MI))
return Value;
unsigned Alignment = HexagonMCInstrInfo::getExtentAlignment(MCII, MI);
uint32_t Lower6 = static_cast<uint32_t>(Value >> Alignment) & 0x3f;
int64_t Bits;
bool Success = Extender->getOperand(0).getExpr()->evaluateAsAbsolute(Bits);
assert(Success);(void)Success;
uint32_t Upper26 = static_cast<uint32_t>(Bits);
uint32_t Operand = Upper26 | Lower6;
return Operand;
}
template <size_t T>
static void signedDecoder(MCInst &MI, unsigned tmp, const void *Decoder) {
HexagonDisassembler const &Disassembler = disassembler(Decoder);
int64_t FullValue = fullValue(*Disassembler.MCII,
**Disassembler.CurrentBundle,
MI, SignExtend64<T>(tmp));
int64_t Extended = SignExtend64<32>(FullValue);
HexagonMCInstrInfo::addConstant(MI, Extended,
Disassembler.getContext());
}
static DecodeStatus unsignedImmDecoder(MCInst &MI, unsigned tmp,
uint64_t /*Address*/,
const void *Decoder) {
HexagonDisassembler const &Disassembler = disassembler(Decoder);
int64_t FullValue = fullValue(*Disassembler.MCII,
**Disassembler.CurrentBundle,
MI, tmp);
assert(FullValue >= 0 && "Negative in unsigned decoder");
HexagonMCInstrInfo::addConstant(MI, FullValue, Disassembler.getContext());
return MCDisassembler::Success;
}
static DecodeStatus s16_0ImmDecoder(MCInst &MI, unsigned tmp,
uint64_t /*Address*/, const void *Decoder) {
signedDecoder<16>(MI, tmp, Decoder);
return MCDisassembler::Success;
}
static DecodeStatus s12_0ImmDecoder(MCInst &MI, unsigned tmp,
uint64_t /*Address*/, const void *Decoder) {
signedDecoder<12>(MI, tmp, Decoder);
return MCDisassembler::Success;
}
static DecodeStatus s11_0ImmDecoder(MCInst &MI, unsigned tmp,
uint64_t /*Address*/, const void *Decoder) {
signedDecoder<11>(MI, tmp, Decoder);
return MCDisassembler::Success;
}
static DecodeStatus s11_1ImmDecoder(MCInst &MI, unsigned tmp,
uint64_t /*Address*/, const void *Decoder) {
HexagonMCInstrInfo::addConstant(MI, SignExtend64<12>(tmp), contextFromDecoder(Decoder));
return MCDisassembler::Success;
}
static DecodeStatus s11_2ImmDecoder(MCInst &MI, unsigned tmp,
uint64_t /*Address*/, const void *Decoder) {
signedDecoder<13>(MI, tmp, Decoder);
return MCDisassembler::Success;
}
static DecodeStatus s11_3ImmDecoder(MCInst &MI, unsigned tmp,
uint64_t /*Address*/, const void *Decoder) {
signedDecoder<14>(MI, tmp, Decoder);
return MCDisassembler::Success;
}
static DecodeStatus s10_0ImmDecoder(MCInst &MI, unsigned tmp,
uint64_t /*Address*/, const void *Decoder) {
signedDecoder<10>(MI, tmp, Decoder);
return MCDisassembler::Success;
}
static DecodeStatus s8_0ImmDecoder(MCInst &MI, unsigned tmp, uint64_t /*Address*/,
const void *Decoder) {
signedDecoder<8>(MI, tmp, Decoder);
return MCDisassembler::Success;
}
static DecodeStatus s6_0ImmDecoder(MCInst &MI, unsigned tmp,
uint64_t /*Address*/, const void *Decoder) {
signedDecoder<6>(MI, tmp, Decoder);
return MCDisassembler::Success;
}
static DecodeStatus s4_0ImmDecoder(MCInst &MI, unsigned tmp,
uint64_t /*Address*/, const void *Decoder) {
signedDecoder<4>(MI, tmp, Decoder);
return MCDisassembler::Success;
}
static DecodeStatus s4_1ImmDecoder(MCInst &MI, unsigned tmp,
uint64_t /*Address*/, const void *Decoder) {
signedDecoder<5>(MI, tmp, Decoder);
return MCDisassembler::Success;
}
static DecodeStatus s4_2ImmDecoder(MCInst &MI, unsigned tmp,
uint64_t /*Address*/, const void *Decoder) {
signedDecoder<6>(MI, tmp, Decoder);
return MCDisassembler::Success;
}
static DecodeStatus s4_3ImmDecoder(MCInst &MI, unsigned tmp,
uint64_t /*Address*/, const void *Decoder) {
signedDecoder<7>(MI, tmp, Decoder);
return MCDisassembler::Success;
}
static DecodeStatus s4_6ImmDecoder(MCInst &MI, unsigned tmp,
uint64_t /*Address*/, const void *Decoder) {
signedDecoder<10>(MI, tmp, Decoder);
return MCDisassembler::Success;
}
static DecodeStatus s3_6ImmDecoder(MCInst &MI, unsigned tmp,
uint64_t /*Address*/, const void *Decoder) {
signedDecoder<19>(MI, tmp, Decoder);
return MCDisassembler::Success;
}
// custom decoder for various jump/call immediates
static DecodeStatus brtargetDecoder(MCInst &MI, unsigned tmp, uint64_t Address,
const void *Decoder) {
HexagonDisassembler const &Disassembler = disassembler(Decoder);
unsigned Bits = HexagonMCInstrInfo::getExtentBits(*Disassembler.MCII, MI);
// r13_2 is not extendable, so if there are no extent bits, it's r13_2
if (Bits == 0)
Bits = 15;
uint32_t FullValue = fullValue(*Disassembler.MCII,
**Disassembler.CurrentBundle,
MI, SignExtend64(tmp, Bits));
int64_t Extended = SignExtend64<32>(FullValue) + Address;
if (!Disassembler.tryAddingSymbolicOperand(MI, Extended, Address, true,
0, 4))
HexagonMCInstrInfo::addConstant(MI, Extended, Disassembler.getContext());
return MCDisassembler::Success;
}
// Addressing mode dependent load store opcode map.
// - If an insn is preceded by an extender the address is absolute.
// - memw(##symbol) = r0
// - If an insn is not preceded by an extender the address is GP relative.
// - memw(gp + #symbol) = r0
// Please note that the instructions must be ordered in the descending order
// of their opcode.
// HexagonII::INST_ICLASS_ST
static const unsigned int StoreConditionalOpcodeData[][2] = {
{S4_pstorerdfnew_abs, 0xafc02084},
{S4_pstorerdtnew_abs, 0xafc02080},
{S4_pstorerdf_abs, 0xafc00084},
{S4_pstorerdt_abs, 0xafc00080},
{S4_pstorerinewfnew_abs, 0xafa03084},
{S4_pstorerinewtnew_abs, 0xafa03080},
{S4_pstorerhnewfnew_abs, 0xafa02884},
{S4_pstorerhnewtnew_abs, 0xafa02880},
{S4_pstorerbnewfnew_abs, 0xafa02084},
{S4_pstorerbnewtnew_abs, 0xafa02080},
{S4_pstorerinewf_abs, 0xafa01084},
{S4_pstorerinewt_abs, 0xafa01080},
{S4_pstorerhnewf_abs, 0xafa00884},
{S4_pstorerhnewt_abs, 0xafa00880},
{S4_pstorerbnewf_abs, 0xafa00084},
{S4_pstorerbnewt_abs, 0xafa00080},
{S4_pstorerifnew_abs, 0xaf802084},
{S4_pstoreritnew_abs, 0xaf802080},
{S4_pstorerif_abs, 0xaf800084},
{S4_pstorerit_abs, 0xaf800080},
{S4_pstorerhfnew_abs, 0xaf402084},
{S4_pstorerhtnew_abs, 0xaf402080},
{S4_pstorerhf_abs, 0xaf400084},
{S4_pstorerht_abs, 0xaf400080},
{S4_pstorerbfnew_abs, 0xaf002084},
{S4_pstorerbtnew_abs, 0xaf002080},
{S4_pstorerbf_abs, 0xaf000084},
{S4_pstorerbt_abs, 0xaf000080}};
// HexagonII::INST_ICLASS_LD
// HexagonII::INST_ICLASS_LD_ST_2
static unsigned int LoadStoreOpcodeData[][2] = {{PS_loadrdabs, 0x49c00000},
{PS_loadriabs, 0x49800000},
{PS_loadruhabs, 0x49600000},
{PS_loadrhabs, 0x49400000},
{PS_loadrubabs, 0x49200000},
{PS_loadrbabs, 0x49000000},
{PS_storerdabs, 0x48c00000},
{PS_storerinewabs, 0x48a01000},
{PS_storerhnewabs, 0x48a00800},
{PS_storerbnewabs, 0x48a00000},
{PS_storeriabs, 0x48800000},
{PS_storerfabs, 0x48600000},
{PS_storerhabs, 0x48400000},
{PS_storerbabs, 0x48000000}};
static const size_t NumCondS = array_lengthof(StoreConditionalOpcodeData);
static const size_t NumLS = array_lengthof(LoadStoreOpcodeData);
static DecodeStatus decodeSpecial(MCInst &MI, uint32_t insn) {
unsigned MachineOpcode = 0;
unsigned LLVMOpcode = 0;
if ((insn & HexagonII::INST_ICLASS_MASK) == HexagonII::INST_ICLASS_ST) {
for (size_t i = 0; i < NumCondS; ++i) {
if ((insn & StoreConditionalOpcodeData[i][1]) ==
StoreConditionalOpcodeData[i][1]) {
MachineOpcode = StoreConditionalOpcodeData[i][1];
LLVMOpcode = StoreConditionalOpcodeData[i][0];
break;
}
}
}
if ((insn & HexagonII::INST_ICLASS_MASK) == HexagonII::INST_ICLASS_LD_ST_2) {
for (size_t i = 0; i < NumLS; ++i) {
if ((insn & LoadStoreOpcodeData[i][1]) == LoadStoreOpcodeData[i][1]) {
MachineOpcode = LoadStoreOpcodeData[i][1];
LLVMOpcode = LoadStoreOpcodeData[i][0];
break;
}
}
}
if (MachineOpcode) {
unsigned Value = 0;
unsigned shift = 0;
MI.setOpcode(LLVMOpcode);
// Remove the parse bits from the insn.
insn &= ~HexagonII::INST_PARSE_MASK;
switch (LLVMOpcode) {
default:
return MCDisassembler::Fail;
break;
case Hexagon::S4_pstorerdf_abs:
case Hexagon::S4_pstorerdt_abs:
case Hexagon::S4_pstorerdfnew_abs:
case Hexagon::S4_pstorerdtnew_abs:
// op: Pv
Value = insn & UINT64_C(3);
DecodePredRegsRegisterClass(MI, Value, 0, nullptr);
// op: u6
Value = (insn >> 12) & UINT64_C(48);
Value |= (insn >> 3) & UINT64_C(15);
MI.addOperand(MCOperand::createImm(Value));
// op: Rtt
Value = (insn >> 8) & UINT64_C(31);
DecodeDoubleRegsRegisterClass(MI, Value, 0, nullptr);
break;
case Hexagon::S4_pstorerbnewf_abs:
case Hexagon::S4_pstorerbnewt_abs:
case Hexagon::S4_pstorerbnewfnew_abs:
case Hexagon::S4_pstorerbnewtnew_abs:
case Hexagon::S4_pstorerhnewf_abs:
case Hexagon::S4_pstorerhnewt_abs:
case Hexagon::S4_pstorerhnewfnew_abs:
case Hexagon::S4_pstorerhnewtnew_abs:
case Hexagon::S4_pstorerinewf_abs:
case Hexagon::S4_pstorerinewt_abs:
case Hexagon::S4_pstorerinewfnew_abs:
case Hexagon::S4_pstorerinewtnew_abs:
// op: Pv
Value = insn & UINT64_C(3);
DecodePredRegsRegisterClass(MI, Value, 0, nullptr);
// op: u6
Value = (insn >> 12) & UINT64_C(48);
Value |= (insn >> 3) & UINT64_C(15);
MI.addOperand(MCOperand::createImm(Value));
// op: Nt
Value = (insn >> 8) & UINT64_C(7);
DecodeIntRegsRegisterClass(MI, Value, 0, nullptr);
break;
case Hexagon::S4_pstorerbf_abs:
case Hexagon::S4_pstorerbt_abs:
case Hexagon::S4_pstorerbfnew_abs:
case Hexagon::S4_pstorerbtnew_abs:
case Hexagon::S4_pstorerhf_abs:
case Hexagon::S4_pstorerht_abs:
case Hexagon::S4_pstorerhfnew_abs:
case Hexagon::S4_pstorerhtnew_abs:
case Hexagon::S4_pstorerif_abs:
case Hexagon::S4_pstorerit_abs:
case Hexagon::S4_pstorerifnew_abs:
case Hexagon::S4_pstoreritnew_abs:
// op: Pv
Value = insn & UINT64_C(3);
DecodePredRegsRegisterClass(MI, Value, 0, nullptr);
// op: u6
Value = (insn >> 12) & UINT64_C(48);
Value |= (insn >> 3) & UINT64_C(15);
MI.addOperand(MCOperand::createImm(Value));
// op: Rt
Value = (insn >> 8) & UINT64_C(31);
DecodeIntRegsRegisterClass(MI, Value, 0, nullptr);
break;
case Hexagon::L4_ploadrdf_abs:
case Hexagon::L4_ploadrdt_abs:
case Hexagon::L4_ploadrdfnew_abs:
case Hexagon::L4_ploadrdtnew_abs:
// op: Rdd
Value = insn & UINT64_C(31);
DecodeDoubleRegsRegisterClass(MI, Value, 0, nullptr);
// op: Pt
Value = ((insn >> 9) & UINT64_C(3));
DecodePredRegsRegisterClass(MI, Value, 0, nullptr);
// op: u6
Value = ((insn >> 15) & UINT64_C(62));
Value |= ((insn >> 8) & UINT64_C(1));
MI.addOperand(MCOperand::createImm(Value));
break;
case Hexagon::L4_ploadrbf_abs:
case Hexagon::L4_ploadrbt_abs:
case Hexagon::L4_ploadrbfnew_abs:
case Hexagon::L4_ploadrbtnew_abs:
case Hexagon::L4_ploadrhf_abs:
case Hexagon::L4_ploadrht_abs:
case Hexagon::L4_ploadrhfnew_abs:
case Hexagon::L4_ploadrhtnew_abs:
case Hexagon::L4_ploadrubf_abs:
case Hexagon::L4_ploadrubt_abs:
case Hexagon::L4_ploadrubfnew_abs:
case Hexagon::L4_ploadrubtnew_abs:
case Hexagon::L4_ploadruhf_abs:
case Hexagon::L4_ploadruht_abs:
case Hexagon::L4_ploadruhfnew_abs:
case Hexagon::L4_ploadruhtnew_abs:
case Hexagon::L4_ploadrif_abs:
case Hexagon::L4_ploadrit_abs:
case Hexagon::L4_ploadrifnew_abs:
case Hexagon::L4_ploadritnew_abs:
// op: Rd
Value = insn & UINT64_C(31);
DecodeIntRegsRegisterClass(MI, Value, 0, nullptr);
// op: Pt
Value = (insn >> 9) & UINT64_C(3);
DecodePredRegsRegisterClass(MI, Value, 0, nullptr);
// op: u6
Value = (insn >> 15) & UINT64_C(62);
Value |= (insn >> 8) & UINT64_C(1);
MI.addOperand(MCOperand::createImm(Value));
break;
// op: g16_2
case (Hexagon::PS_loadriabs):
++shift;
// op: g16_1
case Hexagon::PS_loadrhabs:
case Hexagon::PS_loadruhabs:
++shift;
// op: g16_0
case Hexagon::PS_loadrbabs:
case Hexagon::PS_loadrubabs:
// op: Rd
Value |= insn & UINT64_C(31);
DecodeIntRegsRegisterClass(MI, Value, 0, nullptr);
Value = (insn >> 11) & UINT64_C(49152);
Value |= (insn >> 7) & UINT64_C(15872);
Value |= (insn >> 5) & UINT64_C(511);
MI.addOperand(MCOperand::createImm(Value << shift));
break;
case Hexagon::PS_loadrdabs:
Value = insn & UINT64_C(31);
DecodeDoubleRegsRegisterClass(MI, Value, 0, nullptr);
Value = (insn >> 11) & UINT64_C(49152);
Value |= (insn >> 7) & UINT64_C(15872);
Value |= (insn >> 5) & UINT64_C(511);
MI.addOperand(MCOperand::createImm(Value << 3));
break;
case Hexagon::PS_storerdabs:
// op: g16_3
Value = (insn >> 11) & UINT64_C(49152);
Value |= (insn >> 7) & UINT64_C(15872);
Value |= (insn >> 5) & UINT64_C(256);
Value |= insn & UINT64_C(255);
MI.addOperand(MCOperand::createImm(Value << 3));
// op: Rtt
Value = (insn >> 8) & UINT64_C(31);
DecodeDoubleRegsRegisterClass(MI, Value, 0, nullptr);
break;
// op: g16_2
case Hexagon::PS_storerinewabs:
++shift;
// op: g16_1
case Hexagon::PS_storerhnewabs:
++shift;
// op: g16_0
case Hexagon::PS_storerbnewabs:
Value = (insn >> 11) & UINT64_C(49152);
Value |= (insn >> 7) & UINT64_C(15872);
Value |= (insn >> 5) & UINT64_C(256);
Value |= insn & UINT64_C(255);
MI.addOperand(MCOperand::createImm(Value << shift));
// op: Nt
Value = (insn >> 8) & UINT64_C(7);
DecodeIntRegsRegisterClass(MI, Value, 0, nullptr);
break;
// op: g16_2
case Hexagon::PS_storeriabs:
++shift;
// op: g16_1
case Hexagon::PS_storerhabs:
case Hexagon::PS_storerfabs:
++shift;
// op: g16_0
case Hexagon::PS_storerbabs:
Value = (insn >> 11) & UINT64_C(49152);
Value |= (insn >> 7) & UINT64_C(15872);
Value |= (insn >> 5) & UINT64_C(256);
Value |= insn & UINT64_C(255);
MI.addOperand(MCOperand::createImm(Value << shift));
// op: Rt
Value = (insn >> 8) & UINT64_C(31);
DecodeIntRegsRegisterClass(MI, Value, 0, nullptr);
break;
}
return MCDisassembler::Success;
}
return MCDisassembler::Fail;
}
static DecodeStatus decodeImmext(MCInst &MI, uint32_t insn,
void const *Decoder) {
// Instruction Class for a constant a extender: bits 31:28 = 0x0000
if ((~insn & 0xf0000000) == 0xf0000000) {
unsigned Value;
// 27:16 High 12 bits of 26-bit extender.
Value = (insn & 0x0fff0000) << 4;
// 13:0 Low 14 bits of 26-bit extender.
Value |= ((insn & 0x3fff) << 6);
MI.setOpcode(Hexagon::A4_ext);
HexagonMCInstrInfo::addConstant(MI, Value, contextFromDecoder(Decoder));
return MCDisassembler::Success;
}
return MCDisassembler::Fail;
}
// These values are from HexagonGenMCCodeEmitter.inc and HexagonIsetDx.td
enum subInstBinaryValues {
SA1_addi_BITS = 0x0000,
SA1_addi_MASK = 0x1800,
SA1_addrx_BITS = 0x1800,
SA1_addrx_MASK = 0x1f00,
SA1_addsp_BITS = 0x0c00,
SA1_addsp_MASK = 0x1c00,
SA1_and1_BITS = 0x1200,
SA1_and1_MASK = 0x1f00,
SA1_clrf_BITS = 0x1a70,
SA1_clrf_MASK = 0x1e70,
SA1_clrfnew_BITS = 0x1a50,
SA1_clrfnew_MASK = 0x1e70,
SA1_clrt_BITS = 0x1a60,
SA1_clrt_MASK = 0x1e70,
SA1_clrtnew_BITS = 0x1a40,
SA1_clrtnew_MASK = 0x1e70,
SA1_cmpeqi_BITS = 0x1900,
SA1_cmpeqi_MASK = 0x1f00,
SA1_combine0i_BITS = 0x1c00,
SA1_combine0i_MASK = 0x1d18,
SA1_combine1i_BITS = 0x1c08,
SA1_combine1i_MASK = 0x1d18,
SA1_combine2i_BITS = 0x1c10,
SA1_combine2i_MASK = 0x1d18,
SA1_combine3i_BITS = 0x1c18,
SA1_combine3i_MASK = 0x1d18,
SA1_combinerz_BITS = 0x1d08,
SA1_combinerz_MASK = 0x1d08,
SA1_combinezr_BITS = 0x1d00,
SA1_combinezr_MASK = 0x1d08,
SA1_dec_BITS = 0x1300,
SA1_dec_MASK = 0x1f00,
SA1_inc_BITS = 0x1100,
SA1_inc_MASK = 0x1f00,
SA1_seti_BITS = 0x0800,
SA1_seti_MASK = 0x1c00,
SA1_setin1_BITS = 0x1a00,
SA1_setin1_MASK = 0x1e40,
SA1_sxtb_BITS = 0x1500,
SA1_sxtb_MASK = 0x1f00,
SA1_sxth_BITS = 0x1400,
SA1_sxth_MASK = 0x1f00,
SA1_tfr_BITS = 0x1000,
SA1_tfr_MASK = 0x1f00,
SA1_zxtb_BITS = 0x1700,
SA1_zxtb_MASK = 0x1f00,
SA1_zxth_BITS = 0x1600,
SA1_zxth_MASK = 0x1f00,
SL1_loadri_io_BITS = 0x0000,
SL1_loadri_io_MASK = 0x1000,
SL1_loadrub_io_BITS = 0x1000,
SL1_loadrub_io_MASK = 0x1000,
SL2_deallocframe_BITS = 0x1f00,
SL2_deallocframe_MASK = 0x1fc0,
SL2_jumpr31_BITS = 0x1fc0,
SL2_jumpr31_MASK = 0x1fc4,
SL2_jumpr31_f_BITS = 0x1fc5,
SL2_jumpr31_f_MASK = 0x1fc7,
SL2_jumpr31_fnew_BITS = 0x1fc7,
SL2_jumpr31_fnew_MASK = 0x1fc7,
SL2_jumpr31_t_BITS = 0x1fc4,
SL2_jumpr31_t_MASK = 0x1fc7,
SL2_jumpr31_tnew_BITS = 0x1fc6,
SL2_jumpr31_tnew_MASK = 0x1fc7,
SL2_loadrb_io_BITS = 0x1000,
SL2_loadrb_io_MASK = 0x1800,
SL2_loadrd_sp_BITS = 0x1e00,
SL2_loadrd_sp_MASK = 0x1f00,
SL2_loadrh_io_BITS = 0x0000,
SL2_loadrh_io_MASK = 0x1800,
SL2_loadri_sp_BITS = 0x1c00,
SL2_loadri_sp_MASK = 0x1e00,
SL2_loadruh_io_BITS = 0x0800,
SL2_loadruh_io_MASK = 0x1800,
SL2_return_BITS = 0x1f40,
SL2_return_MASK = 0x1fc4,
SL2_return_f_BITS = 0x1f45,
SL2_return_f_MASK = 0x1fc7,
SL2_return_fnew_BITS = 0x1f47,
SL2_return_fnew_MASK = 0x1fc7,
SL2_return_t_BITS = 0x1f44,
SL2_return_t_MASK = 0x1fc7,
SL2_return_tnew_BITS = 0x1f46,
SL2_return_tnew_MASK = 0x1fc7,
SS1_storeb_io_BITS = 0x1000,
SS1_storeb_io_MASK = 0x1000,
SS1_storew_io_BITS = 0x0000,
SS1_storew_io_MASK = 0x1000,
SS2_allocframe_BITS = 0x1c00,
SS2_allocframe_MASK = 0x1e00,
SS2_storebi0_BITS = 0x1200,
SS2_storebi0_MASK = 0x1f00,
SS2_storebi1_BITS = 0x1300,
SS2_storebi1_MASK = 0x1f00,
SS2_stored_sp_BITS = 0x0a00,
SS2_stored_sp_MASK = 0x1e00,
SS2_storeh_io_BITS = 0x0000,
SS2_storeh_io_MASK = 0x1800,
SS2_storew_sp_BITS = 0x0800,
SS2_storew_sp_MASK = 0x1e00,
SS2_storewi0_BITS = 0x1000,
SS2_storewi0_MASK = 0x1f00,
SS2_storewi1_BITS = 0x1100,
SS2_storewi1_MASK = 0x1f00
};
static unsigned GetSubinstOpcode(unsigned IClass, unsigned inst, unsigned &op,
raw_ostream &os) {
switch (IClass) {
case HexagonII::HSIG_L1:
if ((inst & SL1_loadri_io_MASK) == SL1_loadri_io_BITS)
op = Hexagon::SL1_loadri_io;
else if ((inst & SL1_loadrub_io_MASK) == SL1_loadrub_io_BITS)
op = Hexagon::SL1_loadrub_io;
else {
os << "<unknown subinstruction>";
return MCDisassembler::Fail;
}
break;
case HexagonII::HSIG_L2:
if ((inst & SL2_deallocframe_MASK) == SL2_deallocframe_BITS)
op = Hexagon::SL2_deallocframe;
else if ((inst & SL2_jumpr31_MASK) == SL2_jumpr31_BITS)
op = Hexagon::SL2_jumpr31;
else if ((inst & SL2_jumpr31_f_MASK) == SL2_jumpr31_f_BITS)
op = Hexagon::SL2_jumpr31_f;
else if ((inst & SL2_jumpr31_fnew_MASK) == SL2_jumpr31_fnew_BITS)
op = Hexagon::SL2_jumpr31_fnew;
else if ((inst & SL2_jumpr31_t_MASK) == SL2_jumpr31_t_BITS)
op = Hexagon::SL2_jumpr31_t;
else if ((inst & SL2_jumpr31_tnew_MASK) == SL2_jumpr31_tnew_BITS)
op = Hexagon::SL2_jumpr31_tnew;
else if ((inst & SL2_loadrb_io_MASK) == SL2_loadrb_io_BITS)
op = Hexagon::SL2_loadrb_io;
else if ((inst & SL2_loadrd_sp_MASK) == SL2_loadrd_sp_BITS)
op = Hexagon::SL2_loadrd_sp;
else if ((inst & SL2_loadrh_io_MASK) == SL2_loadrh_io_BITS)
op = Hexagon::SL2_loadrh_io;
else if ((inst & SL2_loadri_sp_MASK) == SL2_loadri_sp_BITS)
op = Hexagon::SL2_loadri_sp;
else if ((inst & SL2_loadruh_io_MASK) == SL2_loadruh_io_BITS)
op = Hexagon::SL2_loadruh_io;
else if ((inst & SL2_return_MASK) == SL2_return_BITS)
op = Hexagon::SL2_return;
else if ((inst & SL2_return_f_MASK) == SL2_return_f_BITS)
op = Hexagon::SL2_return_f;
else if ((inst & SL2_return_fnew_MASK) == SL2_return_fnew_BITS)
op = Hexagon::SL2_return_fnew;
else if ((inst & SL2_return_t_MASK) == SL2_return_t_BITS)
op = Hexagon::SL2_return_t;
else if ((inst & SL2_return_tnew_MASK) == SL2_return_tnew_BITS)
op = Hexagon::SL2_return_tnew;
else {
os << "<unknown subinstruction>";
return MCDisassembler::Fail;
}
break;
case HexagonII::HSIG_A:
if ((inst & SA1_addi_MASK) == SA1_addi_BITS)
op = Hexagon::SA1_addi;
else if ((inst & SA1_addrx_MASK) == SA1_addrx_BITS)
op = Hexagon::SA1_addrx;
else if ((inst & SA1_addsp_MASK) == SA1_addsp_BITS)
op = Hexagon::SA1_addsp;
else if ((inst & SA1_and1_MASK) == SA1_and1_BITS)
op = Hexagon::SA1_and1;
else if ((inst & SA1_clrf_MASK) == SA1_clrf_BITS)
op = Hexagon::SA1_clrf;
else if ((inst & SA1_clrfnew_MASK) == SA1_clrfnew_BITS)
op = Hexagon::SA1_clrfnew;
else if ((inst & SA1_clrt_MASK) == SA1_clrt_BITS)
op = Hexagon::SA1_clrt;
else if ((inst & SA1_clrtnew_MASK) == SA1_clrtnew_BITS)
op = Hexagon::SA1_clrtnew;
else if ((inst & SA1_cmpeqi_MASK) == SA1_cmpeqi_BITS)
op = Hexagon::SA1_cmpeqi;
else if ((inst & SA1_combine0i_MASK) == SA1_combine0i_BITS)
op = Hexagon::SA1_combine0i;
else if ((inst & SA1_combine1i_MASK) == SA1_combine1i_BITS)
op = Hexagon::SA1_combine1i;
else if ((inst & SA1_combine2i_MASK) == SA1_combine2i_BITS)
op = Hexagon::SA1_combine2i;
else if ((inst & SA1_combine3i_MASK) == SA1_combine3i_BITS)
op = Hexagon::SA1_combine3i;
else if ((inst & SA1_combinerz_MASK) == SA1_combinerz_BITS)
op = Hexagon::SA1_combinerz;
else if ((inst & SA1_combinezr_MASK) == SA1_combinezr_BITS)
op = Hexagon::SA1_combinezr;
else if ((inst & SA1_dec_MASK) == SA1_dec_BITS)
op = Hexagon::SA1_dec;
else if ((inst & SA1_inc_MASK) == SA1_inc_BITS)
op = Hexagon::SA1_inc;
else if ((inst & SA1_seti_MASK) == SA1_seti_BITS)
op = Hexagon::SA1_seti;
else if ((inst & SA1_setin1_MASK) == SA1_setin1_BITS)
op = Hexagon::SA1_setin1;
else if ((inst & SA1_sxtb_MASK) == SA1_sxtb_BITS)
op = Hexagon::SA1_sxtb;
else if ((inst & SA1_sxth_MASK) == SA1_sxth_BITS)
op = Hexagon::SA1_sxth;
else if ((inst & SA1_tfr_MASK) == SA1_tfr_BITS)
op = Hexagon::SA1_tfr;
else if ((inst & SA1_zxtb_MASK) == SA1_zxtb_BITS)
op = Hexagon::SA1_zxtb;
else if ((inst & SA1_zxth_MASK) == SA1_zxth_BITS)
op = Hexagon::SA1_zxth;
else {
os << "<unknown subinstruction>";
return MCDisassembler::Fail;
}
break;
case HexagonII::HSIG_S1:
if ((inst & SS1_storeb_io_MASK) == SS1_storeb_io_BITS)
op = Hexagon::SS1_storeb_io;
else if ((inst & SS1_storew_io_MASK) == SS1_storew_io_BITS)
op = Hexagon::SS1_storew_io;
else {
os << "<unknown subinstruction>";
return MCDisassembler::Fail;
}
break;
case HexagonII::HSIG_S2:
if ((inst & SS2_allocframe_MASK) == SS2_allocframe_BITS)
op = Hexagon::SS2_allocframe;
else if ((inst & SS2_storebi0_MASK) == SS2_storebi0_BITS)
op = Hexagon::SS2_storebi0;
else if ((inst & SS2_storebi1_MASK) == SS2_storebi1_BITS)
op = Hexagon::SS2_storebi1;
else if ((inst & SS2_stored_sp_MASK) == SS2_stored_sp_BITS)
op = Hexagon::SS2_stored_sp;
else if ((inst & SS2_storeh_io_MASK) == SS2_storeh_io_BITS)
op = Hexagon::SS2_storeh_io;
else if ((inst & SS2_storew_sp_MASK) == SS2_storew_sp_BITS)
op = Hexagon::SS2_storew_sp;
else if ((inst & SS2_storewi0_MASK) == SS2_storewi0_BITS)
op = Hexagon::SS2_storewi0;
else if ((inst & SS2_storewi1_MASK) == SS2_storewi1_BITS)
op = Hexagon::SS2_storewi1;
else {
os << "<unknown subinstruction>";
return MCDisassembler::Fail;
}
break;
default:
os << "<unknown>";
return MCDisassembler::Fail;
}
return MCDisassembler::Success;
}
static unsigned getRegFromSubinstEncoding(unsigned encoded_reg) {
if (encoded_reg < 8)
return Hexagon::R0 + encoded_reg;
else if (encoded_reg < 16)
return Hexagon::R0 + encoded_reg + 8;
// patently false value
return Hexagon::NoRegister;
}
static unsigned getDRegFromSubinstEncoding(unsigned encoded_dreg) {
if (encoded_dreg < 4)
return Hexagon::D0 + encoded_dreg;
else if (encoded_dreg < 8)
return Hexagon::D0 + encoded_dreg + 4;
// patently false value
return Hexagon::NoRegister;
}
void HexagonDisassembler::addSubinstOperands(MCInst *MI, unsigned opcode,
unsigned inst) const {
int64_t operand;
MCOperand Op;
switch (opcode) {
case Hexagon::SL2_deallocframe:
case Hexagon::SL2_jumpr31:
case Hexagon::SL2_jumpr31_f:
case Hexagon::SL2_jumpr31_fnew:
case Hexagon::SL2_jumpr31_t:
case Hexagon::SL2_jumpr31_tnew:
case Hexagon::SL2_return:
case Hexagon::SL2_return_f:
case Hexagon::SL2_return_fnew:
case Hexagon::SL2_return_t:
case Hexagon::SL2_return_tnew:
// no operands for these instructions
break;
case Hexagon::SS2_allocframe:
// u 8-4{5_3}
operand = ((inst & 0x1f0) >> 4) << 3;
HexagonMCInstrInfo::addConstant(*MI, operand, getContext());
break;
case Hexagon::SL1_loadri_io:
// Rd 3-0, Rs 7-4, u 11-8{4_2}
operand = getRegFromSubinstEncoding(inst & 0xf);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
operand = getRegFromSubinstEncoding((inst & 0xf0) >> 4);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
operand = (inst & 0xf00) >> 6;
HexagonMCInstrInfo::addConstant(*MI, operand, getContext());
break;
case Hexagon::SL1_loadrub_io:
// Rd 3-0, Rs 7-4, u 11-8
operand = getRegFromSubinstEncoding(inst & 0xf);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
operand = getRegFromSubinstEncoding((inst & 0xf0) >> 4);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
operand = (inst & 0xf00) >> 8;
HexagonMCInstrInfo::addConstant(*MI, operand, getContext());
break;
case Hexagon::SL2_loadrb_io:
// Rd 3-0, Rs 7-4, u 10-8
operand = getRegFromSubinstEncoding(inst & 0xf);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
operand = getRegFromSubinstEncoding((inst & 0xf0) >> 4);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
operand = (inst & 0x700) >> 8;
HexagonMCInstrInfo::addConstant(*MI, operand, getContext());
break;
case Hexagon::SL2_loadrh_io:
case Hexagon::SL2_loadruh_io:
// Rd 3-0, Rs 7-4, u 10-8{3_1}
operand = getRegFromSubinstEncoding(inst & 0xf);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
operand = getRegFromSubinstEncoding((inst & 0xf0) >> 4);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
operand = ((inst & 0x700) >> 8) << 1;
HexagonMCInstrInfo::addConstant(*MI, operand, getContext());
break;
case Hexagon::SL2_loadrd_sp:
// Rdd 2-0, u 7-3{5_3}
operand = getDRegFromSubinstEncoding(inst & 0x7);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
operand = ((inst & 0x0f8) >> 3) << 3;
HexagonMCInstrInfo::addConstant(*MI, operand, getContext());
break;
case Hexagon::SL2_loadri_sp:
// Rd 3-0, u 8-4{5_2}
operand = getRegFromSubinstEncoding(inst & 0xf);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
operand = ((inst & 0x1f0) >> 4) << 2;
HexagonMCInstrInfo::addConstant(*MI, operand, getContext());
break;
case Hexagon::SA1_addi:
// Rx 3-0 (x2), s7 10-4
operand = getRegFromSubinstEncoding(inst & 0xf);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
MI->addOperand(Op);
operand = SignExtend64<7>((inst & 0x7f0) >> 4);
HexagonMCInstrInfo::addConstant(*MI, operand, getContext());
break;
case Hexagon::SA1_addrx:
// Rx 3-0 (x2), Rs 7-4
operand = getRegFromSubinstEncoding(inst & 0xf);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
MI->addOperand(Op);
operand = getRegFromSubinstEncoding((inst & 0xf0) >> 4);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
break;
case Hexagon::SA1_and1:
case Hexagon::SA1_dec:
case Hexagon::SA1_inc:
case Hexagon::SA1_sxtb:
case Hexagon::SA1_sxth:
case Hexagon::SA1_tfr:
case Hexagon::SA1_zxtb:
case Hexagon::SA1_zxth:
// Rd 3-0, Rs 7-4
operand = getRegFromSubinstEncoding(inst & 0xf);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
operand = getRegFromSubinstEncoding((inst & 0xf0) >> 4);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
break;
case Hexagon::SA1_addsp:
// Rd 3-0, u 9-4{6_2}
operand = getRegFromSubinstEncoding(inst & 0xf);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
operand = ((inst & 0x3f0) >> 4) << 2;
HexagonMCInstrInfo::addConstant(*MI, operand, getContext());
break;
case Hexagon::SA1_seti:
// Rd 3-0, u 9-4
operand = getRegFromSubinstEncoding(inst & 0xf);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
operand = (inst & 0x3f0) >> 4;
HexagonMCInstrInfo::addConstant(*MI, operand, getContext());
break;
case Hexagon::SA1_clrf:
case Hexagon::SA1_clrfnew:
case Hexagon::SA1_clrt:
case Hexagon::SA1_clrtnew:
case Hexagon::SA1_setin1:
// Rd 3-0
operand = getRegFromSubinstEncoding(inst & 0xf);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
if (opcode == Hexagon::SA1_setin1)
break;
MI->addOperand(MCOperand::createReg(Hexagon::P0));
break;
case Hexagon::SA1_cmpeqi:
// Rs 7-4, u 1-0
operand = getRegFromSubinstEncoding((inst & 0xf0) >> 4);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
operand = inst & 0x3;
HexagonMCInstrInfo::addConstant(*MI, operand, getContext());
break;
case Hexagon::SA1_combine0i:
case Hexagon::SA1_combine1i:
case Hexagon::SA1_combine2i:
case Hexagon::SA1_combine3i:
// Rdd 2-0, u 6-5
operand = getDRegFromSubinstEncoding(inst & 0x7);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
operand = (inst & 0x060) >> 5;
HexagonMCInstrInfo::addConstant(*MI, operand, getContext());
break;
case Hexagon::SA1_combinerz:
case Hexagon::SA1_combinezr:
// Rdd 2-0, Rs 7-4
operand = getDRegFromSubinstEncoding(inst & 0x7);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
operand = getRegFromSubinstEncoding((inst & 0xf0) >> 4);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
break;
case Hexagon::SS1_storeb_io:
// Rs 7-4, u 11-8, Rt 3-0
operand = getRegFromSubinstEncoding((inst & 0xf0) >> 4);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
operand = (inst & 0xf00) >> 8;
HexagonMCInstrInfo::addConstant(*MI, operand, getContext());
operand = getRegFromSubinstEncoding(inst & 0xf);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
break;
case Hexagon::SS1_storew_io:
// Rs 7-4, u 11-8{4_2}, Rt 3-0
operand = getRegFromSubinstEncoding((inst & 0xf0) >> 4);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
operand = ((inst & 0xf00) >> 8) << 2;
HexagonMCInstrInfo::addConstant(*MI, operand, getContext());
operand = getRegFromSubinstEncoding(inst & 0xf);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
break;
case Hexagon::SS2_storebi0:
case Hexagon::SS2_storebi1:
// Rs 7-4, u 3-0
operand = getRegFromSubinstEncoding((inst & 0xf0) >> 4);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
operand = inst & 0xf;
HexagonMCInstrInfo::addConstant(*MI, operand, getContext());
break;
case Hexagon::SS2_storewi0:
case Hexagon::SS2_storewi1:
// Rs 7-4, u 3-0{4_2}
operand = getRegFromSubinstEncoding((inst & 0xf0) >> 4);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
operand = (inst & 0xf) << 2;
HexagonMCInstrInfo::addConstant(*MI, operand, getContext());
break;
case Hexagon::SS2_stored_sp:
// s 8-3{6_3}, Rtt 2-0
operand = SignExtend64<9>(((inst & 0x1f8) >> 3) << 3);
HexagonMCInstrInfo::addConstant(*MI, operand, getContext());
operand = getDRegFromSubinstEncoding(inst & 0x7);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
break;
case Hexagon::SS2_storeh_io:
// Rs 7-4, u 10-8{3_1}, Rt 3-0
operand = getRegFromSubinstEncoding((inst & 0xf0) >> 4);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
operand = ((inst & 0x700) >> 8) << 1;
HexagonMCInstrInfo::addConstant(*MI, operand, getContext());
operand = getRegFromSubinstEncoding(inst & 0xf);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
break;
case Hexagon::SS2_storew_sp:
// u 8-4{5_2}, Rd 3-0
operand = ((inst & 0x1f0) >> 4) << 2;
HexagonMCInstrInfo::addConstant(*MI, operand, getContext());
operand = getRegFromSubinstEncoding(inst & 0xf);
Op = MCOperand::createReg(operand);
MI->addOperand(Op);
break;
default:
// don't crash with an invalid subinstruction
// llvm_unreachable("Invalid subinstruction in duplex instruction");
break;
}
}
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