843 lines
34 KiB
C++
843 lines
34 KiB
C++
//===- HexagonDisassembler.cpp - Disassembler for Hexagon 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 "hexagon-disassembler"
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#include "MCTargetDesc/HexagonBaseInfo.h"
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#include "MCTargetDesc/HexagonMCChecker.h"
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#include "MCTargetDesc/HexagonMCInstrInfo.h"
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#include "MCTargetDesc/HexagonMCTargetDesc.h"
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCDisassembler/MCDisassembler.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCFixedLenDisassembler.h"
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#include "llvm/MC/MCInst.h"
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#include "llvm/MC/MCInstrInfo.h"
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#include "llvm/MC/MCRegisterInfo.h"
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#include "llvm/MC/MCSubtargetInfo.h"
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#include "llvm/Support/Endian.h"
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#include "llvm/Support/MathExtras.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 <cassert>
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#include <cstddef>
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#include <cstdint>
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#include <memory>
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using namespace llvm;
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using namespace Hexagon;
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using DecodeStatus = MCDisassembler::DecodeStatus;
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namespace {
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/// Hexagon disassembler for all Hexagon platforms.
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class HexagonDisassembler : public MCDisassembler {
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public:
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std::unique_ptr<MCInstrInfo const> const MCII;
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std::unique_ptr<MCInst *> CurrentBundle;
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mutable MCInst const *CurrentExtender;
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HexagonDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx,
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MCInstrInfo const *MCII)
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: MCDisassembler(STI, Ctx), MCII(MCII), CurrentBundle(new MCInst *),
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CurrentExtender(nullptr) {}
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DecodeStatus getSingleInstruction(MCInst &Instr, MCInst &MCB,
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ArrayRef<uint8_t> Bytes, uint64_t Address,
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raw_ostream &VStream, raw_ostream &CStream,
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bool &Complete) const;
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DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size,
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ArrayRef<uint8_t> Bytes, uint64_t Address,
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raw_ostream &VStream,
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raw_ostream &CStream) const override;
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void remapInstruction(MCInst &Instr) const;
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};
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static uint64_t fullValue(HexagonDisassembler const &Disassembler, MCInst &MI,
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int64_t Value) {
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MCInstrInfo MCII = *Disassembler.MCII;
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if (!Disassembler.CurrentExtender ||
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MI.size() != HexagonMCInstrInfo::getExtendableOp(MCII, MI))
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return Value;
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unsigned Alignment = HexagonMCInstrInfo::getExtentAlignment(MCII, MI);
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uint32_t Lower6 = static_cast<uint32_t>(Value >> Alignment) & 0x3f;
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int64_t Bits;
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bool Success =
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Disassembler.CurrentExtender->getOperand(0).getExpr()->evaluateAsAbsolute(
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Bits);
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assert(Success);
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(void)Success;
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uint64_t Upper26 = static_cast<uint64_t>(Bits);
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uint64_t Operand = Upper26 | Lower6;
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return Operand;
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}
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static HexagonDisassembler const &disassembler(void const *Decoder) {
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return *static_cast<HexagonDisassembler const *>(Decoder);
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}
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template <size_t T>
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static void signedDecoder(MCInst &MI, unsigned tmp, const void *Decoder) {
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HexagonDisassembler const &Disassembler = disassembler(Decoder);
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int64_t FullValue = fullValue(Disassembler, MI, SignExtend64<T>(tmp));
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int64_t Extended = SignExtend64<32>(FullValue);
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HexagonMCInstrInfo::addConstant(MI, Extended, Disassembler.getContext());
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}
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}
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// Forward declare these because the auto-generated code will reference them.
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// Definitions are further down.
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static DecodeStatus DecodeIntRegsRegisterClass(MCInst &Inst, unsigned RegNo,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeGeneralSubRegsRegisterClass(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 DecodeIntRegsLow8RegisterClass(MCInst &Inst, unsigned RegNo,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeHvxVRRegisterClass(MCInst &Inst, unsigned RegNo,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeDoubleRegsRegisterClass(MCInst &Inst, unsigned RegNo,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus
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DecodeGeneralDoubleLow8RegsRegisterClass(MCInst &Inst, unsigned RegNo,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeHvxWRRegisterClass(MCInst &Inst, unsigned RegNo,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodePredRegsRegisterClass(MCInst &Inst, unsigned RegNo,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeHvxQRRegisterClass(MCInst &Inst, unsigned RegNo,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeCtrRegsRegisterClass(MCInst &Inst, unsigned RegNo,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeGuestRegsRegisterClass(MCInst &Inst, unsigned RegNo,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeModRegsRegisterClass(MCInst &Inst, unsigned RegNo,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeCtrRegs64RegisterClass(MCInst &Inst, unsigned RegNo,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeGuestRegs64RegisterClass(MCInst &Inst, unsigned RegNo,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus unsignedImmDecoder(MCInst &MI, unsigned tmp,
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uint64_t Address, const void *Decoder);
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static DecodeStatus s32_0ImmDecoder(MCInst &MI, unsigned tmp,
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uint64_t /*Address*/, const void *Decoder);
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static DecodeStatus brtargetDecoder(MCInst &MI, unsigned tmp, uint64_t Address,
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const void *Decoder);
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static DecodeStatus s4_0ImmDecoder(MCInst &MI, unsigned tmp, uint64_t,
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const void *Decoder) {
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signedDecoder<4>(MI, tmp, Decoder);
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return MCDisassembler::Success;
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}
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static DecodeStatus s29_3ImmDecoder(MCInst &MI, unsigned tmp, uint64_t,
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const void *Decoder) {
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signedDecoder<14>(MI, tmp, Decoder);
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return MCDisassembler::Success;
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}
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static DecodeStatus s8_0ImmDecoder(MCInst &MI, unsigned tmp, uint64_t,
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const void *Decoder) {
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signedDecoder<8>(MI, tmp, Decoder);
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return MCDisassembler::Success;
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}
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static DecodeStatus s4_3ImmDecoder(MCInst &MI, unsigned tmp, uint64_t,
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const void *Decoder) {
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signedDecoder<7>(MI, tmp, Decoder);
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return MCDisassembler::Success;
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}
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static DecodeStatus s31_1ImmDecoder(MCInst &MI, unsigned tmp, uint64_t,
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const void *Decoder) {
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signedDecoder<12>(MI, tmp, Decoder);
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return MCDisassembler::Success;
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}
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static DecodeStatus s3_0ImmDecoder(MCInst &MI, unsigned tmp, uint64_t,
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const void *Decoder) {
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signedDecoder<3>(MI, tmp, Decoder);
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return MCDisassembler::Success;
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}
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static DecodeStatus s30_2ImmDecoder(MCInst &MI, unsigned tmp, uint64_t,
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const void *Decoder) {
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signedDecoder<13>(MI, tmp, Decoder);
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return MCDisassembler::Success;
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}
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static DecodeStatus s6_0ImmDecoder(MCInst &MI, unsigned tmp, uint64_t,
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const void *Decoder) {
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signedDecoder<6>(MI, tmp, Decoder);
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return MCDisassembler::Success;
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}
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static DecodeStatus s6_3ImmDecoder(MCInst &MI, unsigned tmp, uint64_t,
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const void *Decoder) {
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signedDecoder<9>(MI, tmp, Decoder);
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return MCDisassembler::Success;
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}
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static DecodeStatus s4_1ImmDecoder(MCInst &MI, unsigned tmp, uint64_t,
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const void *Decoder) {
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signedDecoder<5>(MI, tmp, Decoder);
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return MCDisassembler::Success;
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}
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static DecodeStatus s4_2ImmDecoder(MCInst &MI, unsigned tmp, uint64_t,
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const void *Decoder) {
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signedDecoder<6>(MI, tmp, Decoder);
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return MCDisassembler::Success;
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}
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#include "HexagonGenDisassemblerTables.inc"
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static MCDisassembler *createHexagonDisassembler(const Target &T,
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const MCSubtargetInfo &STI,
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MCContext &Ctx) {
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return new HexagonDisassembler(STI, Ctx, T.createMCInstrInfo());
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}
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extern "C" void LLVMInitializeHexagonDisassembler() {
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TargetRegistry::RegisterMCDisassembler(getTheHexagonTarget(),
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createHexagonDisassembler);
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}
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DecodeStatus HexagonDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
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ArrayRef<uint8_t> Bytes,
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uint64_t Address,
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raw_ostream &os,
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raw_ostream &cs) const {
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DecodeStatus Result = DecodeStatus::Success;
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bool Complete = false;
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Size = 0;
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*CurrentBundle = &MI;
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MI.setOpcode(Hexagon::BUNDLE);
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MI.addOperand(MCOperand::createImm(0));
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while (Result == Success && !Complete) {
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if (Bytes.size() < HEXAGON_INSTR_SIZE)
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return MCDisassembler::Fail;
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MCInst *Inst = new (getContext()) MCInst;
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Result = getSingleInstruction(*Inst, MI, Bytes, Address, os, cs, Complete);
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MI.addOperand(MCOperand::createInst(Inst));
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Size += HEXAGON_INSTR_SIZE;
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Bytes = Bytes.slice(HEXAGON_INSTR_SIZE);
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}
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if (Result == MCDisassembler::Fail)
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return Result;
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if (Size > HEXAGON_MAX_PACKET_SIZE)
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return MCDisassembler::Fail;
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HexagonMCChecker Checker(getContext(), *MCII, STI, MI,
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*getContext().getRegisterInfo(), false);
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if (!Checker.check())
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return MCDisassembler::Fail;
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remapInstruction(MI);
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return MCDisassembler::Success;
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}
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void HexagonDisassembler::remapInstruction(MCInst &Instr) const {
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for (auto I: HexagonMCInstrInfo::bundleInstructions(Instr)) {
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auto &MI = const_cast<MCInst &>(*I.getInst());
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switch (MI.getOpcode()) {
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case Hexagon::S2_allocframe:
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if (MI.getOperand(0).getReg() == Hexagon::R29) {
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MI.setOpcode(Hexagon::S6_allocframe_to_raw);
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MI.erase(MI.begin () + 1);
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MI.erase(MI.begin ());
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}
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break;
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case Hexagon::L2_deallocframe:
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if (MI.getOperand(0).getReg() == Hexagon::D15 &&
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MI.getOperand(1).getReg() == Hexagon::R30) {
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MI.setOpcode(L6_deallocframe_map_to_raw);
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MI.erase(MI.begin () + 1);
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MI.erase(MI.begin ());
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}
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break;
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case Hexagon::L4_return:
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if (MI.getOperand(0).getReg() == Hexagon::D15 &&
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MI.getOperand(1).getReg() == Hexagon::R30) {
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MI.setOpcode(L6_return_map_to_raw);
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MI.erase(MI.begin () + 1);
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MI.erase(MI.begin ());
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}
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break;
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case Hexagon::L4_return_t:
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if (MI.getOperand(0).getReg() == Hexagon::D15 &&
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MI.getOperand(2).getReg() == Hexagon::R30) {
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MI.setOpcode(L4_return_map_to_raw_t);
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MI.erase(MI.begin () + 2);
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MI.erase(MI.begin ());
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}
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break;
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case Hexagon::L4_return_f:
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if (MI.getOperand(0).getReg() == Hexagon::D15 &&
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MI.getOperand(2).getReg() == Hexagon::R30) {
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MI.setOpcode(L4_return_map_to_raw_f);
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MI.erase(MI.begin () + 2);
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MI.erase(MI.begin ());
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}
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break;
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case Hexagon::L4_return_tnew_pt:
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if (MI.getOperand(0).getReg() == Hexagon::D15 &&
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MI.getOperand(2).getReg() == Hexagon::R30) {
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MI.setOpcode(L4_return_map_to_raw_tnew_pt);
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MI.erase(MI.begin () + 2);
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MI.erase(MI.begin ());
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}
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break;
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case Hexagon::L4_return_fnew_pt:
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if (MI.getOperand(0).getReg() == Hexagon::D15 &&
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MI.getOperand(2).getReg() == Hexagon::R30) {
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MI.setOpcode(L4_return_map_to_raw_fnew_pt);
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MI.erase(MI.begin () + 2);
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MI.erase(MI.begin ());
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}
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break;
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case Hexagon::L4_return_tnew_pnt:
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if (MI.getOperand(0).getReg() == Hexagon::D15 &&
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MI.getOperand(2).getReg() == Hexagon::R30) {
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MI.setOpcode(L4_return_map_to_raw_tnew_pnt);
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MI.erase(MI.begin () + 2);
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MI.erase(MI.begin ());
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}
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break;
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case Hexagon::L4_return_fnew_pnt:
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if (MI.getOperand(0).getReg() == Hexagon::D15 &&
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MI.getOperand(2).getReg() == Hexagon::R30) {
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MI.setOpcode(L4_return_map_to_raw_fnew_pnt);
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MI.erase(MI.begin () + 2);
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MI.erase(MI.begin ());
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}
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break;
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}
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}
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}
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static void adjustDuplex(MCInst &MI, MCContext &Context) {
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switch (MI.getOpcode()) {
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case Hexagon::SA1_setin1:
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MI.insert(MI.begin() + 1,
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MCOperand::createExpr(MCConstantExpr::create(-1, Context)));
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break;
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case Hexagon::SA1_dec:
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MI.insert(MI.begin() + 2,
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MCOperand::createExpr(MCConstantExpr::create(-1, Context)));
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break;
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default:
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break;
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}
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}
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DecodeStatus HexagonDisassembler::getSingleInstruction(
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MCInst &MI, MCInst &MCB, ArrayRef<uint8_t> Bytes, uint64_t Address,
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raw_ostream &os, raw_ostream &cs, bool &Complete) const {
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assert(Bytes.size() >= HEXAGON_INSTR_SIZE);
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uint32_t Instruction = support::endian::read32le(Bytes.data());
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auto BundleSize = HexagonMCInstrInfo::bundleSize(MCB);
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if ((Instruction & HexagonII::INST_PARSE_MASK) ==
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HexagonII::INST_PARSE_LOOP_END) {
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if (BundleSize == 0)
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HexagonMCInstrInfo::setInnerLoop(MCB);
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else if (BundleSize == 1)
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HexagonMCInstrInfo::setOuterLoop(MCB);
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else
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return DecodeStatus::Fail;
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}
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CurrentExtender = HexagonMCInstrInfo::extenderForIndex(
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MCB, HexagonMCInstrInfo::bundleSize(MCB));
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DecodeStatus Result = DecodeStatus::Fail;
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if ((Instruction & HexagonII::INST_PARSE_MASK) ==
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HexagonII::INST_PARSE_DUPLEX) {
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unsigned duplexIClass;
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uint8_t const *DecodeLow, *DecodeHigh;
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duplexIClass = ((Instruction >> 28) & 0xe) | ((Instruction >> 13) & 0x1);
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switch (duplexIClass) {
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default:
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return MCDisassembler::Fail;
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case 0:
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DecodeLow = DecoderTableSUBINSN_L132;
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DecodeHigh = DecoderTableSUBINSN_L132;
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break;
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case 1:
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DecodeLow = DecoderTableSUBINSN_L232;
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DecodeHigh = DecoderTableSUBINSN_L132;
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break;
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case 2:
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DecodeLow = DecoderTableSUBINSN_L232;
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DecodeHigh = DecoderTableSUBINSN_L232;
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break;
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case 3:
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DecodeLow = DecoderTableSUBINSN_A32;
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DecodeHigh = DecoderTableSUBINSN_A32;
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break;
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case 4:
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DecodeLow = DecoderTableSUBINSN_L132;
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DecodeHigh = DecoderTableSUBINSN_A32;
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break;
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case 5:
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DecodeLow = DecoderTableSUBINSN_L232;
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DecodeHigh = DecoderTableSUBINSN_A32;
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break;
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case 6:
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DecodeLow = DecoderTableSUBINSN_S132;
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DecodeHigh = DecoderTableSUBINSN_A32;
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break;
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case 7:
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DecodeLow = DecoderTableSUBINSN_S232;
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DecodeHigh = DecoderTableSUBINSN_A32;
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break;
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case 8:
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DecodeLow = DecoderTableSUBINSN_S132;
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DecodeHigh = DecoderTableSUBINSN_L132;
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break;
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case 9:
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DecodeLow = DecoderTableSUBINSN_S132;
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DecodeHigh = DecoderTableSUBINSN_L232;
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break;
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case 10:
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DecodeLow = DecoderTableSUBINSN_S132;
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DecodeHigh = DecoderTableSUBINSN_S132;
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break;
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case 11:
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DecodeLow = DecoderTableSUBINSN_S232;
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DecodeHigh = DecoderTableSUBINSN_S132;
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break;
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case 12:
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DecodeLow = DecoderTableSUBINSN_S232;
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DecodeHigh = DecoderTableSUBINSN_L132;
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break;
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case 13:
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DecodeLow = DecoderTableSUBINSN_S232;
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DecodeHigh = DecoderTableSUBINSN_L232;
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break;
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case 14:
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DecodeLow = DecoderTableSUBINSN_S232;
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DecodeHigh = DecoderTableSUBINSN_S232;
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break;
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}
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MI.setOpcode(Hexagon::DuplexIClass0 + duplexIClass);
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MCInst *MILow = new (getContext()) MCInst;
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MCInst *MIHigh = new (getContext()) MCInst;
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auto TmpExtender = CurrentExtender;
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CurrentExtender =
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nullptr; // constant extenders in duplex must always be in slot 1
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Result = decodeInstruction(DecodeLow, *MILow, Instruction & 0x1fff, Address,
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this, STI);
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CurrentExtender = TmpExtender;
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if (Result != DecodeStatus::Success)
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return DecodeStatus::Fail;
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adjustDuplex(*MILow, getContext());
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Result = decodeInstruction(
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DecodeHigh, *MIHigh, (Instruction >> 16) & 0x1fff, Address, this, STI);
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if (Result != DecodeStatus::Success)
|
|
return DecodeStatus::Fail;
|
|
adjustDuplex(*MIHigh, getContext());
|
|
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;
|
|
|
|
if (CurrentExtender != nullptr)
|
|
Result = decodeInstruction(DecoderTableMustExtend32, MI, Instruction,
|
|
Address, this, STI);
|
|
|
|
if (Result != MCDisassembler::Success)
|
|
Result = decodeInstruction(DecoderTable32, MI, Instruction, Address, this,
|
|
STI);
|
|
|
|
if (Result != MCDisassembler::Success &&
|
|
STI.getFeatureBits()[Hexagon::ExtensionHVX])
|
|
Result = decodeInstruction(DecoderTableEXT_mmvec32, MI, Instruction,
|
|
Address, this, STI);
|
|
|
|
}
|
|
|
|
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);
|
|
bool PrevVector = false;
|
|
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;
|
|
bool CurrentVector = HexagonMCInstrInfo::isVector(*MCII, *i->getInst());
|
|
if (Vector && !CurrentVector)
|
|
// Skip scalars when calculating distances for vectors
|
|
++Lookback;
|
|
if (HexagonMCInstrInfo::isImmext(*i->getInst()) && (Vector == PrevVector))
|
|
++Lookback;
|
|
PrevVector = CurrentVector;
|
|
if (Offset == Lookback)
|
|
break;
|
|
}
|
|
auto const &Inst = *i->getInst();
|
|
bool SubregBit = (Register & 0x1) != 0;
|
|
if (HexagonMCInstrInfo::hasNewValue2(*MCII, Inst)) {
|
|
// If subreg bit is set we're selecting the second produced newvalue
|
|
unsigned Producer = SubregBit ?
|
|
HexagonMCInstrInfo::getNewValueOperand(*MCII, Inst).getReg() :
|
|
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;
|
|
}
|
|
|
|
if (CurrentExtender != 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;
|
|
}
|
|
|
|
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 DecodeGeneralSubRegsRegisterClass(MCInst &Inst,
|
|
unsigned RegNo,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
static const MCPhysReg GeneralSubRegDecoderTable[] = {
|
|
Hexagon::R0, Hexagon::R1, Hexagon::R2, Hexagon::R3,
|
|
Hexagon::R4, Hexagon::R5, Hexagon::R6, Hexagon::R7,
|
|
Hexagon::R16, Hexagon::R17, Hexagon::R18, Hexagon::R19,
|
|
Hexagon::R20, Hexagon::R21, Hexagon::R22, Hexagon::R23,
|
|
};
|
|
|
|
return DecodeRegisterClass(Inst, RegNo, GeneralSubRegDecoderTable);
|
|
}
|
|
|
|
static DecodeStatus DecodeHvxVRRegisterClass(MCInst &Inst, unsigned RegNo,
|
|
uint64_t /*Address*/,
|
|
const void *Decoder) {
|
|
static const MCPhysReg HvxVRDecoderTable[] = {
|
|
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, HvxVRDecoderTable);
|
|
}
|
|
|
|
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 DecodeGeneralDoubleLow8RegsRegisterClass(
|
|
MCInst &Inst, unsigned RegNo, uint64_t /*Address*/, const void *Decoder) {
|
|
static const MCPhysReg GeneralDoubleLow8RegDecoderTable[] = {
|
|
Hexagon::D0, Hexagon::D1, Hexagon::D2, Hexagon::D3,
|
|
Hexagon::D8, Hexagon::D9, Hexagon::D10, Hexagon::D11};
|
|
|
|
return DecodeRegisterClass(Inst, RegNo, GeneralDoubleLow8RegDecoderTable);
|
|
}
|
|
|
|
static DecodeStatus DecodeHvxWRRegisterClass(MCInst &Inst, unsigned RegNo,
|
|
uint64_t /*Address*/,
|
|
const void *Decoder) {
|
|
static const MCPhysReg HvxWRDecoderTable[] = {
|
|
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, HvxWRDecoderTable));
|
|
}
|
|
|
|
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 DecodeHvxQRRegisterClass(MCInst &Inst, unsigned RegNo,
|
|
uint64_t /*Address*/,
|
|
const void *Decoder) {
|
|
static const MCPhysReg HvxQRDecoderTable[] = {Hexagon::Q0, Hexagon::Q1,
|
|
Hexagon::Q2, Hexagon::Q3};
|
|
|
|
return DecodeRegisterClass(Inst, RegNo, HvxQRDecoderTable);
|
|
}
|
|
|
|
static DecodeStatus DecodeCtrRegsRegisterClass(MCInst &Inst, unsigned RegNo,
|
|
uint64_t /*Address*/,
|
|
const void *Decoder) {
|
|
using namespace Hexagon;
|
|
|
|
static const MCPhysReg CtrlRegDecoderTable[] = {
|
|
/* 0 */ SA0, LC0, SA1, LC1,
|
|
/* 4 */ P3_0, C5, M0, M1,
|
|
/* 8 */ USR, PC, UGP, GP,
|
|
/* 12 */ CS0, CS1, UPCYCLELO, UPCYCLEHI,
|
|
/* 16 */ FRAMELIMIT, FRAMEKEY, PKTCOUNTLO, PKTCOUNTHI,
|
|
/* 20 */ 0, 0, 0, 0,
|
|
/* 24 */ 0, 0, 0, 0,
|
|
/* 28 */ 0, 0, UTIMERLO, UTIMERHI
|
|
};
|
|
|
|
if (RegNo >= array_lengthof(CtrlRegDecoderTable))
|
|
return MCDisassembler::Fail;
|
|
|
|
static_assert(NoRegister == 0, "Expecting NoRegister to be 0");
|
|
if (CtrlRegDecoderTable[RegNo] == 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) {
|
|
using namespace Hexagon;
|
|
|
|
static const MCPhysReg CtrlReg64DecoderTable[] = {
|
|
/* 0 */ C1_0, 0, C3_2, 0,
|
|
/* 4 */ C5_4, 0, C7_6, 0,
|
|
/* 8 */ C9_8, 0, C11_10, 0,
|
|
/* 12 */ CS, 0, UPCYCLE, 0,
|
|
/* 16 */ C17_16, 0, PKTCOUNT, 0,
|
|
/* 20 */ 0, 0, 0, 0,
|
|
/* 24 */ 0, 0, 0, 0,
|
|
/* 28 */ 0, 0, UTIMER, 0
|
|
};
|
|
|
|
if (RegNo >= array_lengthof(CtrlReg64DecoderTable))
|
|
return MCDisassembler::Fail;
|
|
|
|
static_assert(NoRegister == 0, "Expecting NoRegister to be 0");
|
|
if (CtrlReg64DecoderTable[RegNo] == 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 DecodeStatus unsignedImmDecoder(MCInst &MI, unsigned tmp,
|
|
uint64_t /*Address*/,
|
|
const void *Decoder) {
|
|
HexagonDisassembler const &Disassembler = disassembler(Decoder);
|
|
int64_t FullValue = fullValue(Disassembler, MI, tmp);
|
|
assert(FullValue >= 0 && "Negative in unsigned decoder");
|
|
HexagonMCInstrInfo::addConstant(MI, FullValue, Disassembler.getContext());
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus s32_0ImmDecoder(MCInst &MI, unsigned tmp,
|
|
uint64_t /*Address*/, const void *Decoder) {
|
|
HexagonDisassembler const &Disassembler = disassembler(Decoder);
|
|
unsigned Bits = HexagonMCInstrInfo::getExtentBits(*Disassembler.MCII, MI);
|
|
tmp = SignExtend64(tmp, Bits);
|
|
signedDecoder<32>(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;
|
|
uint64_t FullValue = fullValue(Disassembler, MI, SignExtend64(tmp, Bits));
|
|
uint32_t Extended = FullValue + Address;
|
|
if (!Disassembler.tryAddingSymbolicOperand(MI, Extended, Address, true, 0, 4))
|
|
HexagonMCInstrInfo::addConstant(MI, Extended, Disassembler.getContext());
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeGuestRegsRegisterClass(MCInst &Inst, unsigned RegNo,
|
|
uint64_t /*Address*/,
|
|
const void *Decoder) {
|
|
using namespace Hexagon;
|
|
|
|
static const MCPhysReg GuestRegDecoderTable[] = {
|
|
/* 0 */ GELR, GSR, GOSP, G3,
|
|
/* 4 */ G4, G5, G6, G7,
|
|
/* 8 */ G8, G9, G10, G11,
|
|
/* 12 */ G12, G13, G14, G15,
|
|
/* 16 */ GPMUCNT4, GPMUCNT5, GPMUCNT6, GPMUCNT7,
|
|
/* 20 */ G20, G21, G22, G23,
|
|
/* 24 */ GPCYCLELO, GPCYCLEHI, GPMUCNT0, GPMUCNT1,
|
|
/* 28 */ GPMUCNT2, GPMUCNT3, G30, G31
|
|
};
|
|
|
|
if (RegNo >= array_lengthof(GuestRegDecoderTable))
|
|
return MCDisassembler::Fail;
|
|
if (GuestRegDecoderTable[RegNo] == Hexagon::NoRegister)
|
|
return MCDisassembler::Fail;
|
|
|
|
unsigned Register = GuestRegDecoderTable[RegNo];
|
|
Inst.addOperand(MCOperand::createReg(Register));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeGuestRegs64RegisterClass(MCInst &Inst, unsigned RegNo,
|
|
uint64_t /*Address*/,
|
|
const void *Decoder) {
|
|
using namespace Hexagon;
|
|
|
|
static const MCPhysReg GuestReg64DecoderTable[] = {
|
|
/* 0 */ G1_0, 0, G3_2, 0,
|
|
/* 4 */ G5_4, 0, G7_6, 0,
|
|
/* 8 */ G9_8, 0, G11_10, 0,
|
|
/* 12 */ G13_12, 0, G15_14, 0,
|
|
/* 16 */ G17_16, 0, G19_18, 0,
|
|
/* 20 */ G21_20, 0, G23_22, 0,
|
|
/* 24 */ G25_24, 0, G27_26, 0,
|
|
/* 28 */ G29_28, 0, G31_30, 0
|
|
};
|
|
|
|
if (RegNo >= array_lengthof(GuestReg64DecoderTable))
|
|
return MCDisassembler::Fail;
|
|
if (GuestReg64DecoderTable[RegNo] == Hexagon::NoRegister)
|
|
return MCDisassembler::Fail;
|
|
|
|
unsigned Register = GuestReg64DecoderTable[RegNo];
|
|
Inst.addOperand(MCOperand::createReg(Register));
|
|
return MCDisassembler::Success;
|
|
}
|